Merging USRP X300 and X310 support!!

341 files changed, 80132 insertions, 552 deletions

diff --git a/CHANGELOG b/CHANGELOG
index d69945842..5ee6359e3 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,17 @@
 Change Log for Releases
 ==============================
 
+## 003.007.000
+* Introduced USRP X300 and X310 support!
+* Releasing a CHDR Dissector for Wireshark analysis
+* Improved USRP B200 and B210 stability
+* Introducing Integer-N tuning for WBX, SBX, CBX daughterboards
+* Introducing support for 120 MHz versions of WBX, SBX, CBX
+* Lots of new documentation
+* New GPIO example for USRP X300
+* Fixed threading bug in USRP B2xx code causing GQRX issue
+* General UHD bug fixes & improvements
+
 ## 003.006.002
 * Fixed bug in timed commands example.
 * Improved compatibility for older versions of Boost.
@@ -247,7 +258,7 @@ Change Log for Releases
 ** Incremented FPGA image compat number to 7.2
 ** Incremented firmware image compat number to 10.4
 * N2x0:
-** GPSDO control tweak for some Firefly devices
+** GPSDO control tweak for some devices
 ** Fix for erasure logic in rare bricking cases
 * E100:
 ** Fix RX run state for GPIOs controlled by ATR
diff --git a/firmware/x300/.gitignore b/firmware/x300/.gitignore
new file mode 100644
index 000000000..796b96d1c
--- /dev/null
+++ b/firmware/x300/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/firmware/x300/CMakeLists.txt b/firmware/x300/CMakeLists.txt
new file mode 100644
index 000000000..e2de46634
--- /dev/null
+++ b/firmware/x300/CMakeLists.txt
@@ -0,0 +1,119 @@
+#
+# Copyright 2010-2012 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+# setup project and compiler
+########################################################################
+CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
+#force the compiler because the check wont use the special flag below
+INCLUDE(CMakeForceCompiler)
+SET(CMAKE_SYSTEM_NAME Generic)
+CMAKE_FORCE_C_COMPILER(zpu-elf-gcc GNU)
+PROJECT(B250_FW C)
+
+INCLUDE_DIRECTORIES(include)
+
+find_package(PythonInterp)
+
+########################################################################
+# lwIP header include dirs
+########################################################################
+SET(LWIPDIR ${CMAKE_SOURCE_DIR}/lwip/lwip-1.3.1)
+
+INCLUDE_DIRECTORIES(
+    ${CMAKE_SOURCE_DIR}/lwip
+    ${CMAKE_SOURCE_DIR}/lwip_port
+    ${LWIPDIR}/src/include
+    ${LWIPDIR}/src/include/ipv4
+)
+
+########################################################################
+# misc flags for the gcc compiler
+########################################################################
+SET(CMAKE_C_FLAGS -phi) #always needed compile time and link time
+SET(CMAKE_C_FLAGS_DEBUG -DX300_DEBUG_UART)
+ADD_DEFINITIONS(-Os)
+ADD_DEFINITIONS(--std=gnu99)
+ADD_DEFINITIONS(-Wall)
+ADD_DEFINITIONS(-Werror-implicit-function-declaration)
+ADD_DEFINITIONS(-ffunction-sections)
+ADD_DEFINITIONS(-DPRINTF_LONG_SUPPORT)
+
+MACRO(ADD_LINKER_FLAGS flags)
+    SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flags}")
+ENDMACRO(ADD_LINKER_FLAGS)
+
+ADD_LINKER_FLAGS("-Wl,--gc-sections")
+ADD_LINKER_FLAGS("-Wl,--relax")
+
+########################################################################
+# setup programs for output files
+########################################################################
+FIND_PROGRAM(LINKER zpu-elf-ld)
+FIND_PROGRAM(OBJCOPY zpu-elf-objcopy)
+FIND_PROGRAM(OBJDUMP zpu-elf-objdump)
+FIND_PROGRAM(HEXDUMP hexdump)
+
+########################################################################
+# helper functions to build output formats
+########################################################################
+SET(GEN_OUTPUTS_BIN_SIZE "bin_size_not_set") #set before calling
+MACRO(GEN_OUTPUTS target)
+    GET_FILENAME_COMPONENT(name ${target} NAME_WE)
+    #command to create a map from elf
+    ADD_CUSTOM_COMMAND(
+        OUTPUT ${name}.map DEPENDS ${target}
+        COMMAND ${LINKER} -Map ${name}.map ${target}
+    )
+    #command to create a bin from elf
+    ADD_CUSTOM_COMMAND(
+        OUTPUT ${name}.bin DEPENDS ${target}
+        COMMAND ${OBJCOPY} -O binary ${target} ${name}.bin
+        --pad-to ${GEN_OUTPUTS_BIN_SIZE}
+    )
+    #command to create a ihx from elf
+    ADD_CUSTOM_COMMAND(
+        OUTPUT ${name}.ihx DEPENDS ${target}
+        COMMAND ${OBJCOPY} -O ihex ${target} ${name}.ihx
+        --pad-to ${GEN_OUTPUTS_BIN_SIZE}
+    )
+    #command to create a dump from elf
+    ADD_CUSTOM_COMMAND(
+        OUTPUT ${name}.dump DEPENDS ${target}
+        COMMAND ${OBJDUMP} -DSC ${target} > ${name}.dump
+    )
+    #command to create a rom from bin
+    ADD_CUSTOM_COMMAND(
+        OUTPUT ${name}.rom DEPENDS ${name}.bin
+        COMMAND ${HEXDUMP} -v -e'1/1 \"%.2X\\n\"' ${name}.bin > ${name}.rom
+    )
+    #command to create a coe from bin
+    ADD_CUSTOM_COMMAND(
+        OUTPUT ${name}.coe DEPENDS ${name}.bin
+        COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_SOURCE_DIR}/bin_to_coe.py ${name}.bin ${name}.coe
+    )
+    #add a top level target for output files
+    ADD_CUSTOM_TARGET(
+        ${name}_outputs ALL DEPENDS ${name}.map ${name}.bin ${name}.ihx ${name}.dump ${name}.rom ${name}.coe
+    )
+ENDMACRO(GEN_OUTPUTS)
+
+########################################################################
+# Add the subdirectories
+########################################################################
+ADD_SUBDIRECTORY(lib)
+ADD_SUBDIRECTORY(x300)
diff --git a/firmware/x300/bin_to_coe.py b/firmware/x300/bin_to_coe.py
new file mode 100755
index 000000000..332c705ae
--- /dev/null
+++ b/firmware/x300/bin_to_coe.py
@@ -0,0 +1,18 @@
+#!/usr/bin/python
+
+import sys
+import binascii
+
+if __name__ == '__main__':
+    bin_file = sys.argv[1]
+    coe_file = sys.argv[2]
+
+    #parse bin file into hex lines
+    h = binascii.hexlify(open(bin_file).read()) + '0'*7
+    d = [h[i*8:(i+1)*8] for i in range(len(h)/8)]
+
+    #write output coe file
+    out = open(coe_file, 'w')
+    out.write('memory_initialization_radix=16;\n')
+    out.write('memory_initialization_vector=\n')
+    out.write(',\n'.join([h[i*8:(i+1)*8] for i in range(len(h)/8)]) + ';')
diff --git a/firmware/x300/include/chinch.h b/firmware/x300/include/chinch.h
new file mode 100644
index 000000000..a3e70337a
--- /dev/null
+++ b/firmware/x300/include/chinch.h
@@ -0,0 +1,109 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+#ifndef INCLUDED_CHINCH_H
+#define INCLUDED_CHINCH_H
+
+#include <wb_utils.h>
+#include <stdbool.h>
+#include <printf.h>
+
+#define STATUS_CHAIN(x, status) if (status) status = (x)
+#define STATUS_MERGE(x, status) status &= (x)
+#define STATUS_CHAIN_DBG(x, status) STATUS_CHAIN(x, status); printf("%s: %s\n", #x, status?"succeeded":"failed!")
+
+//The unit for this timeout is somewhat arbitrary. We could use the counter reg to enforce this in
+//terms of clock cycles but that is not worth the extra code
+static const uint32_t CHINCH_DEFAULT_XACT_TIMEOUT   = 32768;
+static const uint32_t CHINCH_FLASH_MAX_BUF_WRITES   = 32;
+
+//-----------------------------------------------------
+// Peek-Poke interface for the Chinch
+//-----------------------------------------------------
+bool chinch_poke(const uint32_t addr, const uint32_t data, bool half_word, uint32_t timeout);
+bool chinch_peek(const uint32_t addr, uint32_t* data, bool half_word, uint32_t timeout);
+
+static inline bool chinch_poke32(const uint32_t addr, const uint32_t data) {
+    return chinch_poke(addr, data, false /*half word*/, CHINCH_DEFAULT_XACT_TIMEOUT);
+}
+static inline bool chinch_poke16(const uint32_t addr, const uint32_t data) {
+    return chinch_poke(addr, data, true /*half word*/, CHINCH_DEFAULT_XACT_TIMEOUT);
+}
+static inline bool chinch_peek32(const uint32_t addr, uint32_t* data) {
+    return chinch_peek(addr, data, false /*half word*/, CHINCH_DEFAULT_XACT_TIMEOUT);
+}
+static inline bool chinch_peek16(const uint32_t addr, uint32_t* data) {
+    return chinch_peek(addr, data, true /*half word*/, CHINCH_DEFAULT_XACT_TIMEOUT);
+}
+
+//-----------------------------------------------------
+// Flash access
+//-----------------------------------------------------
+bool chinch_flash_init();
+void chinch_flash_cleanup();
+bool chinch_flash_select_sector(uint32_t sector);
+bool chinch_flash_erase_sector();
+bool chinch_flash_read_buf(uint32_t offset, uint16_t* buf, uint32_t size);
+bool chinch_flash_write_buf(uint32_t offset, uint16_t* buf, uint32_t size);
+
+static inline bool chinch_flash_read(uint32_t offset, uint16_t* data) {
+    return chinch_flash_read_buf(offset, data, 1);
+}
+static inline bool chinch_flash_write(uint32_t offset, uint16_t data) {
+    return chinch_flash_write_buf(offset, &data, 1);
+}
+
+//-----------------------------------------------------
+// FPGA Configuration
+//-----------------------------------------------------
+typedef uint8_t config_status_t;
+static const config_status_t CHINCH_CONFIG_RUNNING   = 0;
+static const config_status_t CHINCH_CONFIG_DISABLED  = 1;
+static const config_status_t CHINCH_CONFIG_COMPLETED = 2;
+static const config_status_t CHINCH_CONFIG_ERROR     = 3;
+
+void chinch_start_config();   //Caution: This operation will make the ZPU self-destruct!
+config_status_t chinch_get_config_status();
+
+//-----------------------------------------------------
+// Read-back interface for user initiated
+// PCIe register transactions
+//-----------------------------------------------------
+typedef uint8_t pcie_xact_size_t;
+static const pcie_xact_size_t PCIE_XACT_32_BIT = 0;
+static const pcie_xact_size_t PCIE_XACT_16_BIT = 1;
+
+typedef uint8_t pcie_xact_t;
+static const pcie_xact_t PCIE_XACT_ERROR = 0;
+static const pcie_xact_t PCIE_XACT_READ  = 1;
+static const pcie_xact_t PCIE_XACT_WRITE = 2;
+
+typedef bool (*pcie_register_xact_responder_t)(uint32_t response, uint32_t timeout);
+
+typedef struct
+{
+    pcie_xact_t                     type;
+    uint32_t                        addr;
+    uint32_t                        data;
+    pcie_xact_size_t                size;
+    pcie_register_xact_responder_t  respond;
+} pcie_register_xact_t;
+
+bool check_pcie_user_regport(pcie_register_xact_t** xact_info_hdl);
+bool forward_pcie_user_xact_to_wb();
+
+
+#endif /* INCLUDED_CHINCH_H */
diff --git a/firmware/x300/include/ethernet.h b/firmware/x300/include/ethernet.h
new file mode 100644
index 000000000..52f14d05b
--- /dev/null
+++ b/firmware/x300/include/ethernet.h
@@ -0,0 +1,53 @@
+/* -*- c -*- */
+/*
+ * Copyright 2007,2009 Free Software Foundation, Inc.
+ * Copyright 2009 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef INCLUDED_ETHERNET_H
+#define INCLUDED_ETHERNET_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+typedef void (*ethernet_link_changed_callback_t)(int ethnum, int speed);
+
+#define MDIO_PORT 4
+
+/*!
+ * \brief one time call to initialize ethernet
+ */
+void xge_ethernet_init(const uint32_t eth);
+
+/*!
+ * \brief Return number of ethernet interfaces
+ */
+int ethernet_ninterfaces(void);
+
+
+void dump_mdio_regs(const uint8_t eth, uint32_t mdio_port);
+
+/*!
+ * \brief Test status of SFP+ modules
+ */
+void
+xge_poll_sfpp_status(const uint32_t eth);
+
+//! get the link status of eth (true for link up)
+bool ethernet_get_link_up(const uint32_t eth);
+
+#endif /* INCLUDED_ETHERNET_H */
diff --git a/firmware/x300/include/ethertype.h b/firmware/x300/include/ethertype.h
new file mode 100644
index 000000000..235981193
--- /dev/null
+++ b/firmware/x300/include/ethertype.h
@@ -0,0 +1,27 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2009-2011 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef INCLUDED_ETHERTYPE_H
+#define INCLUDED_ETHERTYPE_H
+
+// all we care about
+
+#define	ETHERTYPE_IPV4	0x0800
+#define	ETHERTYPE_ARP	0x0806
+
+
+#endif /* INCLUDED_ETHERTYPE_H */
diff --git a/firmware/x300/include/if_arp.h b/firmware/x300/include/if_arp.h
new file mode 100644
index 000000000..63519c4be
--- /dev/null
+++ b/firmware/x300/include/if_arp.h
@@ -0,0 +1,153 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Global definitions for the ARP (RFC 826) protocol.
+ *
+ * Version:	@(#)if_arp.h	1.0.1	04/16/93
+ *
+ * Authors:	Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
+ *		Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
+ *		Ross Biro
+ *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *		Florian La Roche,
+ *		Jonathan Layes <layes@loran.com>
+ *		Arnaldo Carvalho de Melo <acme@conectiva.com.br> ARPHRD_HWX25
+ *
+ *		This program is free software; you can redistribute it and/or
+ *		modify it under the terms of the GNU General Public License
+ *		as published by the Free Software Foundation; either version
+ *		2 of the License, or (at your option) any later version.
+ */
+#ifndef _LINUX_IF_ARP_H
+#define _LINUX_IF_ARP_H
+
+/* ARP protocol HARDWARE identifiers. */
+#define ARPHRD_NETROM	0		/* from KA9Q: NET/ROM pseudo	*/
+#define ARPHRD_ETHER 	1		/* Ethernet 10Mbps		*/
+#define	ARPHRD_EETHER	2		/* Experimental Ethernet	*/
+#define	ARPHRD_AX25	3		/* AX.25 Level 2		*/
+#define	ARPHRD_PRONET	4		/* PROnet token ring		*/
+#define	ARPHRD_CHAOS	5		/* Chaosnet			*/
+#define	ARPHRD_IEEE802	6		/* IEEE 802.2 Ethernet/TR/TB	*/
+#define	ARPHRD_ARCNET	7		/* ARCnet			*/
+#define	ARPHRD_APPLETLK	8		/* APPLEtalk			*/
+#define ARPHRD_DLCI	15		/* Frame Relay DLCI		*/
+#define ARPHRD_ATM	19		/* ATM 				*/
+#define ARPHRD_METRICOM	23		/* Metricom STRIP (new IANA id)	*/
+#define	ARPHRD_IEEE1394	24		/* IEEE 1394 IPv4 - RFC 2734	*/
+#define ARPHRD_EUI64	27		/* EUI-64                       */
+#define ARPHRD_INFINIBAND 32		/* InfiniBand			*/
+
+/* Dummy types for non ARP hardware */
+#define ARPHRD_SLIP	256
+#define ARPHRD_CSLIP	257
+#define ARPHRD_SLIP6	258
+#define ARPHRD_CSLIP6	259
+#define ARPHRD_RSRVD	260		/* Notional KISS type 		*/
+#define ARPHRD_ADAPT	264
+#define ARPHRD_ROSE	270
+#define ARPHRD_X25	271		/* CCITT X.25			*/
+#define ARPHRD_HWX25	272		/* Boards with X.25 in firmware	*/
+#define ARPHRD_CAN	280		/* Controller Area Network      */
+#define ARPHRD_PPP	512
+#define ARPHRD_CISCO	513		/* Cisco HDLC	 		*/
+#define ARPHRD_HDLC	ARPHRD_CISCO
+#define ARPHRD_LAPB	516		/* LAPB				*/
+#define ARPHRD_DDCMP    517		/* Digital's DDCMP protocol     */
+#define ARPHRD_RAWHDLC	518		/* Raw HDLC			*/
+
+#define ARPHRD_TUNNEL	768		/* IPIP tunnel			*/
+#define ARPHRD_TUNNEL6	769		/* IP6IP6 tunnel       		*/
+#define ARPHRD_FRAD	770             /* Frame Relay Access Device    */
+#define ARPHRD_SKIP	771		/* SKIP vif			*/
+#define ARPHRD_LOOPBACK	772		/* Loopback device		*/
+#define ARPHRD_LOCALTLK 773		/* Localtalk device		*/
+#define ARPHRD_FDDI	774		/* Fiber Distributed Data Interface */
+#define ARPHRD_BIF      775             /* AP1000 BIF                   */
+#define ARPHRD_SIT	776		/* sit0 device - IPv6-in-IPv4	*/
+#define ARPHRD_IPDDP	777		/* IP over DDP tunneller	*/
+#define ARPHRD_IPGRE	778		/* GRE over IP			*/
+#define ARPHRD_PIMREG	779		/* PIMSM register interface	*/
+#define ARPHRD_HIPPI	780		/* High Performance Parallel Interface */
+#define ARPHRD_ASH	781		/* Nexus 64Mbps Ash		*/
+#define ARPHRD_ECONET	782		/* Acorn Econet			*/
+#define ARPHRD_IRDA 	783		/* Linux-IrDA			*/
+/* ARP works differently on different FC media .. so  */
+#define ARPHRD_FCPP	784		/* Point to point fibrechannel	*/
+#define ARPHRD_FCAL	785		/* Fibrechannel arbitrated loop */
+#define ARPHRD_FCPL	786		/* Fibrechannel public loop	*/
+#define ARPHRD_FCFABRIC	787		/* Fibrechannel fabric		*/
+	/* 787->799 reserved for fibrechannel media types */
+#define ARPHRD_IEEE802_TR 800		/* Magic type ident for TR	*/
+#define ARPHRD_IEEE80211 801		/* IEEE 802.11			*/
+#define ARPHRD_IEEE80211_PRISM 802	/* IEEE 802.11 + Prism2 header  */
+#define ARPHRD_IEEE80211_RADIOTAP 803	/* IEEE 802.11 + radiotap header */
+
+#define ARPHRD_VOID	  0xFFFF	/* Void type, nothing is known */
+#define ARPHRD_NONE	  0xFFFE	/* zero header length */
+
+/* ARP protocol opcodes. */
+#define	ARPOP_REQUEST	1		/* ARP request			*/
+#define	ARPOP_REPLY	2		/* ARP reply			*/
+#define	ARPOP_RREQUEST	3		/* RARP request			*/
+#define	ARPOP_RREPLY	4		/* RARP reply			*/
+#define	ARPOP_InREQUEST	8		/* InARP request		*/
+#define	ARPOP_InREPLY	9		/* InARP reply			*/
+#define	ARPOP_NAK	10		/* (ATM)ARP NAK			*/
+
+
+/* ARP Flag values. */
+#define ATF_COM		0x02		/* completed entry (ha valid)	*/
+#define	ATF_PERM	0x04		/* permanent entry		*/
+#define	ATF_PUBL	0x08		/* publish entry		*/
+#define	ATF_USETRAILERS	0x10		/* has requested trailers	*/
+#define ATF_NETMASK     0x20            /* want to use a netmask (only
+					   for proxy entries) */
+#define ATF_DONTPUB	0x40		/* don't answer this addresses	*/
+
+typedef unsigned short  __be16;
+
+/*
+ *	This structure defines an ethernet arp header.
+ */
+struct arphdr
+{
+	__be16		ar_hrd;		/* format of hardware address	*/
+	__be16		ar_pro;		/* format of protocol address	*/
+	unsigned char	ar_hln;		/* length of hardware address	*/
+	unsigned char	ar_pln;		/* length of protocol address	*/
+	__be16		ar_op;		/* ARP opcode (command)		*/
+
+#if 0
+	 /*
+	  *	 Ethernet looks like this : This bit is variable sized however...
+	  */
+	unsigned char		ar_sha[ETH_ALEN];	/* sender hardware address	*/
+	unsigned char		ar_sip[4];		/* sender IP address		*/
+	unsigned char		ar_tha[ETH_ALEN];	/* target hardware address	*/
+	unsigned char		ar_tip[4];		/* target IP address		*/
+#endif
+
+};
+
+/*
+ *	This structure defines an ethernet arp header.
+ */
+struct arp_eth_ipv4
+{
+	__be16		ar_hrd;		/* format of hardware address	*/
+	__be16		ar_pro;		/* format of protocol address	*/
+	unsigned char	ar_hln;		/* length of hardware address	*/
+	unsigned char	ar_pln;		/* length of protocol address	*/
+	__be16		ar_op;		/* ARP opcode (command)		*/
+
+	unsigned char	ar_sha[6];	/* sender hardware address	*/
+	unsigned char	ar_sip[4];	/* sender IP address		*/
+	unsigned char	ar_tha[6];	/* target hardware address	*/
+	unsigned char	ar_tip[4];	/* target IP address		*/
+};
+
+
+#endif	/* _LINUX_IF_ARP_H */
diff --git a/firmware/x300/include/link_state_route_proto.h b/firmware/x300/include/link_state_route_proto.h
new file mode 100644
index 000000000..8feb3e717
--- /dev/null
+++ b/firmware/x300/include/link_state_route_proto.h
@@ -0,0 +1,56 @@
+
+// Copyright 2013 Ettus Research LLC
+
+#ifndef INCLUDED_LINK_STATE_ROUTE_PROTO_H
+#define INCLUDED_LINK_STATE_ROUTE_PROTO_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <lwip/ip_addr.h>
+
+//http://en.wikipedia.org/wiki/Link-state_routing_protocol
+
+//! Initialize internals and handler registration
+void link_state_route_proto_init(void);
+
+/*!
+ * Advances the internal counter to determine expired entries.
+ * Call this periodically, along with the other periodic calls.
+ */
+void link_state_route_proto_tick(void);
+
+//! Initiate a periodic update to the neighbor table
+void link_state_route_proto_update(const uint8_t ethno);
+
+//! Flood the network with information about routes
+void link_state_route_proto_flood(const uint8_t ethno);
+
+/*!
+ * Updates the causes cycle cache for the given source ethno.
+ */
+void link_state_route_proto_update_cycle_cache(const uint8_t ethno);
+
+/*!
+ * Determine if the given link is the cause of a cycle (aka routing loop)
+ * This call does not run the algorithm, but rather checks the cache.
+ * This call also differs from the one below, takes the ethnos.
+ */
+bool link_state_route_proto_causes_cycle_cached(const uint8_t eth_src, const uint8_t eth_dst);
+
+//! Determine if the given link is the cause of a cycle (aka routing loop)
+bool link_state_route_proto_causes_cycle(const struct ip_addr *src, const struct ip_addr *dst);
+
+typedef struct
+{
+    struct ip_addr node;
+    struct ip_addr nbor;
+} ls_node_mapping_t;
+
+/*!
+ * Get a pointer to the node mapping table.
+ * The table length will be set to *length.
+ */
+const ls_node_mapping_t *link_state_route_get_node_mapping(size_t *length);
+
+#endif /* INCLUDED_LINK_STATE_ROUTE_PROTO_H */
diff --git a/firmware/x300/include/mdelay.h b/firmware/x300/include/mdelay.h
new file mode 100644
index 000000000..226bbb3f7
--- /dev/null
+++ b/firmware/x300/include/mdelay.h
@@ -0,0 +1,29 @@
+/* -*- c -*- */
+/*
+ * Copyright 2007 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef INCLUDED_MDELAY_H
+#define INCLUDED_MDELAY_H
+
+/*!
+ * \brief Delay about ms milliseconds
+ *
+ * If simulating, _very_ short delay
+ */
+void mdelay(int ms);
+
+#endif /* INCLUDED_MDELAY_H */
diff --git a/firmware/x300/include/print_addrs.h b/firmware/x300/include/print_addrs.h
new file mode 100644
index 000000000..1aa5d6888
--- /dev/null
+++ b/firmware/x300/include/print_addrs.h
@@ -0,0 +1,15 @@
+// Copyright 2013 Ettus Research LLC
+
+#ifndef INCLUDED_PRINT_ADDRS_H
+#define INCLUDED_PRINT_ADDRS_H
+
+char *mac_addr_to_str_r(const void *addr, char *str);
+char *ip_addr_to_str_r(const void *addr, char *str);
+
+char *mac_addr_to_str(const void *addr);
+char *ip_addr_to_str(const void *addr);
+
+//void print_mac_addr(const void *addr);
+//void print_ip_addr(const void *addr);
+
+#endif /* INCLUDED_PRINT_ADDRS_H */
diff --git a/firmware/x300/include/printf.h b/firmware/x300/include/printf.h
new file mode 100644
index 000000000..6b3088dbe
--- /dev/null
+++ b/firmware/x300/include/printf.h
@@ -0,0 +1,108 @@
+/*
+File: printf.h
+
+Copyright (C) 2004  Kustaa Nyholm
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+See the GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+This library is realy just two files: 'printf.h' and 'printf.c'.
+
+They provide a simple and small (+200 loc) printf functionality to 
+be used in embedded systems.
+
+I've found them so usefull in debugging that I do not bother with a 
+debugger at all.
+
+They are distributed in source form, so to use them, just compile them 
+into your project. 
+
+Two printf variants are provided: printf and sprintf. 
+
+The formats supported by this implementation are: 'd' 'u' 'c' 's' 'x' 'X'.
+
+Zero padding and field width are also supported.
+
+If the library is compiled with 'PRINTF_SUPPORT_LONG' defined then the 
+long specifier is also
+supported. Note that this will pull in some long math routines (pun intended!)
+and thus make your executable noticably longer.
+
+The memory foot print of course depends on the target cpu, compiler and 
+compiler options, but a rough guestimate (based on a H8S target) is about 
+1.4 kB for code and some twenty 'int's and 'char's, say 60 bytes of stack space. 
+Not too bad. Your milage may vary. By hacking the source code you can 
+get rid of some hunred bytes, I'm sure, but personally I feel the balance of 
+functionality and flexibility versus  code size is close to optimal for
+many embedded systems.
+
+To use the printf you need to supply your own character output function, 
+something like :
+
+	void putc ( void* p, char c)
+		{
+		while (!SERIAL_PORT_EMPTY) ;
+		SERIAL_PORT_TX_REGISTER = c;
+		}
+
+Before you can call printf you need to initialize it to use your 
+character output function with something like:
+
+	init_printf(NULL,putc);
+
+Notice the 'NULL' in 'init_printf' and the parameter 'void* p' in 'putc', 
+the NULL (or any pointer) you pass into the 'init_printf' will eventually be 
+passed to your 'putc' routine. This allows you to pass some storage space (or 
+anything realy) to the character output function, if necessary. 
+This is not often needed but it was implemented like that because it made 
+implementing the sprintf function so neat (look at the source code).
+
+The code is re-entrant, except for the 'init_printf' function, so it 
+is safe to call it from interupts too, although this may result in mixed output. 
+If you rely on re-entrancy, take care that your 'putc' function is re-entrant!
+
+The printf and sprintf functions are actually macros that translate to 
+'tfp_printf' and 'tfp_sprintf'. This makes it possible
+to use them along with 'stdio.h' printf's in a single source file. 
+You just need to undef the names before you include the 'stdio.h'.
+Note that these are not function like macros, so if you have variables
+or struct members with these names, things will explode in your face.
+Without variadic macros this is the best we can do to wrap these
+fucnction. If it is a problem just give up the macros and use the
+functions directly or rename them.
+
+For further details see source code.
+
+regs Kusti, 23.10.2004
+*/
+
+
+#ifndef __TFP_PRINTF__
+#define __TFP_PRINTF__
+
+#include <stdarg.h>
+
+void init_printf(void* putp,void (*putf) (void*,char));
+
+void tfp_printf(char *fmt, ...);
+void tfp_sprintf(char* s,char *fmt, ...);
+
+void tfp_format(void* putp,void (*putf) (void*,char),char *fmt, va_list va);
+
+#define printf tfp_printf 
+#define sprintf tfp_sprintf 
+#define PRINTF_LONG_SUPPORT 1
+//#define PRINTF_LONG_LONG_SUPPORT 1 //IJB gcc for ZPU long long appears to have bugs
+
+#endif
diff --git a/firmware/x300/include/stdint.h b/firmware/x300/include/stdint.h
new file mode 100644
index 000000000..b5a8611a9
--- /dev/null
+++ b/firmware/x300/include/stdint.h
@@ -0,0 +1,34 @@
+/* -*- c -*- */
+/*
+ * Copyright 2007,2009 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef INCLUDED_STDINT_H
+#define INCLUDED_STDINT_H
+
+typedef signed char	int8_t;
+typedef unsigned char	uint8_t;
+typedef short		int16_t;
+typedef unsigned short	uint16_t;
+typedef int		int32_t;
+typedef unsigned int	uint32_t;
+typedef long long int		int64_t;
+typedef unsigned long long int	uint64_t;
+
+typedef int		intptr_t;
+typedef unsigned int	uintptr_t;
+
+#endif /* INCLUDED_STDINT_H */
diff --git a/firmware/x300/include/u3_net_stack.h b/firmware/x300/include/u3_net_stack.h
new file mode 100644
index 000000000..cbf714e20
--- /dev/null
+++ b/firmware/x300/include/u3_net_stack.h
@@ -0,0 +1,113 @@
+
+// Copyright 2012-2013 Ettus Research LLC
+
+#ifndef INCLUDED_U3_NET_STACK_H
+#define INCLUDED_U3_NET_STACK_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <wb_pkt_iface64.h>
+
+//----------------------------------------------------------------------
+
+#include <lwip/ip_addr.h>
+#include <lwip/ip.h>
+#include <lwip/udp.h>
+#include <lwip/icmp.h>
+#include <if_arp.h>
+#include <ethertype.h>
+
+typedef struct
+{
+    uint8_t addr[6];
+} eth_mac_addr_t;
+
+typedef struct
+{
+    uint8_t ethno;
+    uint8_t pad[5];
+    eth_mac_addr_t dst;
+    eth_mac_addr_t src;
+    uint16_t ethertype;
+} padded_eth_hdr_t;
+
+//------------------ init stuff ------------------------------------
+
+void u3_net_stack_init(wb_pkt_iface64_config_t *config);
+
+void u3_net_stack_init_eth(const uint8_t ethno, const eth_mac_addr_t *mac, const struct ip_addr *ip, const struct ip_addr *subnet);
+
+const struct ip_addr *u3_net_stack_get_ip_addr(const uint8_t ethno);
+
+const struct ip_addr *u3_net_stack_get_subnet(const uint8_t ethno);
+
+const struct ip_addr *u3_net_stack_get_bcast(const uint8_t ethno);
+
+const eth_mac_addr_t *u3_net_stack_get_mac_addr(const uint8_t ethno);
+
+uint32_t u3_net_stack_get_stat_counts(const uint8_t ethno);
+
+//------------------ udp handling ------------------------------------
+
+typedef void (*u3_net_stack_udp_handler_t)(
+    const uint8_t,
+    const struct ip_addr *, const struct ip_addr *,
+    const uint16_t, const uint16_t,
+    const void *, const size_t
+);
+
+void u3_net_stack_register_udp_handler(
+    const uint16_t port,
+    const u3_net_stack_udp_handler_t handler
+);
+
+void u3_net_stack_send_udp_pkt(
+    const uint8_t ethno,
+    const struct ip_addr *dst,
+    const uint16_t src_port,
+    const uint16_t dst_port,
+    const void *buff,
+    const size_t num_bytes
+);
+
+//------------------ icmp handling ------------------------------------
+
+typedef void (*u3_net_stack_icmp_handler_t)(
+    const uint8_t,
+    const struct ip_addr *, const struct ip_addr *,
+    const uint16_t, const uint16_t,
+    const void *, const size_t
+);
+
+void u3_net_stack_register_icmp_handler(
+    const uint8_t type,
+    const uint8_t code,
+    const u3_net_stack_icmp_handler_t handler
+);
+
+void u3_net_stack_send_icmp_pkt(
+    const uint8_t ethno,
+    const uint8_t type,
+    const uint8_t code,
+    const uint16_t id,
+    const uint16_t seq,
+    const struct ip_addr *dst,
+    const void *buff,
+    const size_t num_bytes
+);
+
+//------------------ entry point ------------------------------------
+
+void u3_net_stack_handle_one(void);
+
+//------------------ arp handling ------------------------------------
+
+void u3_net_stack_send_arp_request(const uint8_t ethno, const struct ip_addr *addr);
+
+//commented out to make private - do we need cache update outside this module?
+//void u3_net_stack_arp_cache_update(const struct ip_addr *ip_addr, const eth_mac_addr_t *mac_addr, const uint8_t ethno);
+
+const eth_mac_addr_t *u3_net_stack_arp_cache_lookup(const struct ip_addr *ip_addr);
+
+#endif /* INCLUDED_U3_NET_STACK_H */
diff --git a/firmware/x300/include/udp_uart.h b/firmware/x300/include/udp_uart.h
new file mode 100644
index 000000000..4a33a9299
--- /dev/null
+++ b/firmware/x300/include/udp_uart.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2011-2013 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef INCLUDED_UDP_UART_H
+#define INCLUDED_UDP_UART_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+/*!
+ * Initialize the UDP/UART module.
+ * Registers handler into the network.
+ */
+void udp_uart_init(const uint32_t uart_base, const uint16_t udp_port);
+
+/*!
+ * Polls the UART state machine,
+ * and sends messages over UDP.
+ */
+void udp_uart_poll(void);
+
+#endif /* INCLUDED_UDP_UART_H */
diff --git a/firmware/x300/include/wb_i2c.h b/firmware/x300/include/wb_i2c.h
new file mode 100644
index 000000000..cb307f373
--- /dev/null
+++ b/firmware/x300/include/wb_i2c.h
@@ -0,0 +1,18 @@
+
+// Copyright 2012 Ettus Research LLC
+
+#ifndef INCLUDED_WB_I2C_H
+#define INCLUDED_WB_I2C_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+void wb_i2c_init(const uint32_t base, const size_t clk_rate);
+
+bool wb_i2c_read(const uint32_t base, const uint8_t i2c_addr, uint8_t *buf, size_t len);
+
+bool wb_i2c_write(const uint32_t base, const uint8_t i2c_addr, const uint8_t *buf, size_t len);
+
+
+#endif /* INCLUDED_WB_I2C_H */
diff --git a/firmware/x300/include/wb_pkt_iface64.h b/firmware/x300/include/wb_pkt_iface64.h
new file mode 100644
index 000000000..aa3c174ed
--- /dev/null
+++ b/firmware/x300/include/wb_pkt_iface64.h
@@ -0,0 +1,44 @@
+
+// Copyright 2012 Ettus Research LLC
+
+#ifndef INCLUDED_WB_PKT_IFACE64_H
+#define INCLUDED_WB_PKT_IFACE64_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+//! opaque, dont touch insides
+typedef struct
+{
+    uint32_t base;
+    uint32_t ctrl;
+    uint32_t config_addr;
+} wb_pkt_iface64_config_t;
+
+//! Init the wb slave for packet interface
+wb_pkt_iface64_config_t wb_pkt_iface64_init(const uint32_t base, const size_t ctrl_offset);
+
+/*!
+ * Poll if an packet has been received.
+ * If yes, return the pointer to the pkt, num_bytes is set.
+ * Otherwise, return null.
+ */
+const void *wb_pkt_iface64_rx_try_claim(wb_pkt_iface64_config_t *config, size_t *num_bytes);
+
+/*!
+ * Release the hold on a received packet.
+ */
+void wb_pkt_iface64_rx_release(wb_pkt_iface64_config_t *config);
+
+/*!
+ * Aquire the buffer for an outgoing packet.
+ */
+void *wb_pkt_iface64_tx_claim(wb_pkt_iface64_config_t *config);
+
+/*!
+ * Submit an outgoing packet from a filled the buffer.
+ */
+void wb_pkt_iface64_tx_submit(wb_pkt_iface64_config_t *config, const size_t num_bytes);
+
+#endif /* INCLUDED_WB_PKT_IFACE64_H */
diff --git a/firmware/x300/include/wb_uart.h b/firmware/x300/include/wb_uart.h
new file mode 100644
index 000000000..46dd97441
--- /dev/null
+++ b/firmware/x300/include/wb_uart.h
@@ -0,0 +1,23 @@
+
+// Copyright 2012 Ettus Research LLC
+
+#ifndef INCLUDED_WB_UART_H
+#define INCLUDED_WB_UART_H
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
+//! Init the uart in question
+void wb_uart_init(const uint32_t base, const size_t div);
+
+//! Put character blocking
+void wb_uart_putc(const uint32_t base, const int ch);
+
+//! Put character not blocking - false for fail
+bool wb_uart_try_putc(const uint32_t base, const int ch);
+
+//! Get character non blocking, -1 for none
+int wb_uart_getc(const uint32_t base);
+
+#endif /* INCLUDED_WB_UART_H */
diff --git a/firmware/x300/include/wb_utils.h b/firmware/x300/include/wb_utils.h
new file mode 100644
index 000000000..34be51b8f
--- /dev/null
+++ b/firmware/x300/include/wb_utils.h
@@ -0,0 +1,24 @@
+
+// Copyright 2012 Ettus Research LLC
+
+#ifndef INCLUDED_WB_UTILS_H
+#define INCLUDED_WB_UTILS_H
+
+#include <stdint.h>
+
+#define localparam static const int
+
+static inline void wb_poke32(const uint32_t addr, const uint32_t data)
+{
+    *((volatile uint32_t *)addr) = data;
+}
+
+static inline uint32_t wb_peek32(const uint32_t addr)
+{
+    const uint32_t data = *((volatile uint32_t *)addr);
+    return data;
+}
+
+#define SR_ADDR(base, offset) ((base) + (offset)*4)
+
+#endif /* INCLUDED_WB_UTILS_H */
diff --git a/firmware/x300/include/xge_mac.h b/firmware/x300/include/xge_mac.h
new file mode 100644
index 000000000..d288bdd8d
--- /dev/null
+++ b/firmware/x300/include/xge_mac.h
@@ -0,0 +1,37 @@
+
+#ifndef INCLUDED_XGE_MAC_H
+#define INCLUDED_XGE_MAC_H
+
+#define HAVE_OPENCORES_XGEMAC 1
+
+#ifdef HAVE_OPENCORES_XGEMAC
+#define XGE_TX_ENABLE    (1 << 0)         // Set to enable transmission.
+// Interupt register bits.
+#define XGE_RX_FRAG_ERR  (1 << 8)
+#define XGE_RX_CRC_ERR   (1 << 7)
+#define XGE_RX_PAUSE     (1 << 6)
+#define XGE_REMOTE_FAULT (1 << 5)
+#define XGE_LOCAL_FAULT  (1 << 4)
+#define XGE_RX_UNDERFLOW (1 << 3)
+#define XGE_RX_OVERFLOW  (1 << 2)
+#define XGE_TX_UNDERFLOW (1 << 1)
+#define XGE_TX_OVERFLOW  (1 << 0)
+#endif
+
+// MDIO OP
+#define XGE_MDIO_CLAUSE(n) ((n & 0x1) << 12)
+#define CLAUSE45 1
+#define CLAUSE22 0
+#define XGE_MDIO_OP(n)     ((n & 0x3) << 10)
+#define MDIO_ADDRESS 0
+#define MDIO_WRITE 1
+#define MDIO_READ 3
+#define MDIO_C22_WRITE 2
+#define MDIO_C22_READ 1
+#define MDIO_READ_POST 2
+#define XGE_MDIO_ADDR(n)   ((n & 0x1f) << 5)
+#define XGE_MDIO_MMD(n)    ((n & 0x1f) << 0)
+
+#endif
+
+
diff --git a/firmware/x300/include/xge_phy.h b/firmware/x300/include/xge_phy.h
new file mode 100644
index 000000000..eeb94753e
--- /dev/null
+++ b/firmware/x300/include/xge_phy.h
@@ -0,0 +1,78 @@
+
+#ifndef INCLUDED_XGE_PHY_H
+#define INCLUDED_XGE_PHY_H
+
+#define HAVE_AEL2005_PHY 1
+
+//
+// IEEE 802.3ae Clause 45 managable device types (DEVAD)
+//
+#define XGE_MDIO_DEVICE_PMA 1
+#define XGE_MDIO_DEVICE_WIS 2
+#define XGE_MDIO_DEVICE_PCS 3
+#define XGE_MDIO_DEVICE_PHY_XS 4
+#define XGE_MDIO_DEVICE_DTE_XS 5
+#define XGE_MDIO_DEVICE_TC 6
+
+//
+// IEEE 802.3ae Clause 45 register set for MDIO
+//
+#define XGE_MDIO_CONTROL1 0
+#define XGE_MDIO_STATUS1 1
+#define XGE_MDIO_DEVID1 2
+#define XGE_MDIO_DEVID2 3
+#define XGE_MDIO_SPEED 4
+#define XGE_MDIO_DEVICES1 5
+#define XGE_MDIO_DEVICES2 6
+#define XGE_MDIO_CONTROL2 7
+#define XGE_MDIO_STATUS2 8
+#define XGE_MDIO_LANESTATUS 24
+#define XGE_MDIO_TESTCTRL 25
+#define XILINX_CORE_VERSION 65535
+
+//
+// QR2 AEL2005 Phy address on MDIO (PORT ADDR)
+//
+#define XGE_MDIO_ADDR_PHY_A 0
+
+//
+// QR2 MDIO address of FPGA XAUI (DTE XS) (PORT ADDR)
+//
+#define XGE_MDIO_ADDR_XAUI_A 2
+
+//
+// ID's for all XGE interfaces
+#define XGE_A 0
+
+// PHY module types 
+enum {
+  SFFP_TYPE_NONE,
+  SFFP_TYPE_SR,
+  SFFP_TYPE_LR,
+  SFFP_TYPE_LRM,
+  SFFP_TYPE_TWINAX,
+  SFFP_TYPE_TWINAX_LONG,
+  SFFP_TYPE_UNKNOWN,
+  SFFP_TYPE_1000BASE_SX,
+  SFFP_TYPE_1000BASE_LX,
+  SFFP_TYPE_1000BASE_T
+};
+
+// PHY module I2C device address 
+// (I2C device driver shifts "7bit" address left 1 bit)
+// SFF-8431 specifys the I2C address as 8 bits with lSB as X
+enum {
+  MODULE_DEV_ADDR = (0xa0 >> 1),
+  SFF_DEV_ADDR    = (0xa2 >>1),
+};
+
+// SFPP module status
+enum {
+  SFFP_NO_CHANGE,
+  SFFP_REMOVED,
+  SFFP_INSERTED
+};
+
+#endif
+
+
diff --git a/firmware/x300/lib/CMakeLists.txt b/firmware/x300/lib/CMakeLists.txt
new file mode 100644
index 000000000..ed5a0a7c0
--- /dev/null
+++ b/firmware/x300/lib/CMakeLists.txt
@@ -0,0 +1,32 @@
+#
+# Copyright 2010-2013 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+
+add_library(usrpfw STATIC
+    udp_uart.c
+    wb_uart.c
+    wb_i2c.c
+    printf.c
+    wb_pkt_iface64.c
+    u3_net_stack.c
+    ethernet.c
+    mdelay.c
+    chinch.c
+    print_addrs.c
+    link_state_route_proto.c
+)
diff --git a/firmware/x300/lib/chinch.c b/firmware/x300/lib/chinch.c
new file mode 100644
index 000000000..054845754
--- /dev/null
+++ b/firmware/x300/lib/chinch.c
@@ -0,0 +1,310 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "chinch.h"
+
+#define PCIE_MSG_REG_BASE   0xFB00
+#define PCIE_MSG_DATA_REG   0 //Write: Data register for outbound requests and responses
+                              //Read:  Latched data for inbound requests
+#define PCIE_MSG_CTRL_REG   1 //Write: Control register for outbound requests and responses (Initiates xfer)
+                              //Read:  Latched control word for inbound requests
+#define PCIE_MSG_RESP_REG   2 //Read:  Latched response data for outbound requests
+#define PCIE_MSG_STATUS_REG 3 //Read:  Status register for inbound and outbound transactions
+
+// Transaction Word Format
+//
+// -Control- --Data--
+// 63     32 31      0
+// |       | |       |
+// FXXA AAAA DDDD DDDD
+//
+// where:
+// D = Data/Payload
+// A = Address
+// X = Reserved
+// F = Flags: {Read_Response, Write_Request, Read_Request, Half_Word_Cycle}
+
+#define PCIE_CTRL_REG_READ_RESP         (1<<31)
+#define PCIE_CTRL_REG_WRITE             (1<<30)
+#define PCIE_CTRL_REG_READ              (1<<29)
+#define PCIE_CTRL_REG_HALF_WORD         (1<<28)
+#define PCIE_CTRL_REG_ADDR_MASK         0x000FFFFF
+
+#define PCIE_STATUS_REG_READ_PENDING    (1<<0)
+#define PCIE_STATUS_REG_REQ_PENDING     (1<<1)
+#define PCIE_STATUS_REG_RESP_PENDING    (1<<2)
+#define PCIE_STATUS_REG_BUSY            (1<<4)
+
+#define CHINCH_FPGA_CONFIG_REG          0x58
+#define CHINCH_FLASH_WINDOW_REG0        0xC0
+#define CHINCH_FLASH_WINDOW_REG1        0xE0
+#define CHINCH_FLASH_2AAA_REG           0x400
+#define CHINCH_FLASH_5555_REG           0x408
+#define CHINCH_FLASH_WINDOW_BASE        0x60000
+#define CHINCH_FLASH_WINDOW_SIZE        0x20000
+#define CHINCH_FLASH_WINDOW_CONF        0x91
+
+//-----------------------------------------------------
+// Peek-Poke interface
+//-----------------------------------------------------
+
+bool chinch_poke(
+    const uint32_t addr,
+    const uint32_t data,
+    bool half_word,
+    uint32_t timeout
+)
+{
+    //Build transaction control word
+    uint32_t ctrl_word = 0, i;
+    ctrl_word |= (addr & PCIE_CTRL_REG_ADDR_MASK);
+    if (half_word) ctrl_word |= PCIE_CTRL_REG_HALF_WORD;
+    ctrl_word |= PCIE_CTRL_REG_WRITE;
+
+    //Wait for space in the transaction queue or timeout
+    i = 0;
+    while ((wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_STATUS_REG)) & PCIE_STATUS_REG_BUSY) != 0) {
+        if (++i > timeout) return false;
+    }
+
+    //Flush transaction control and data registers
+    wb_poke32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_DATA_REG), data);
+    wb_poke32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_CTRL_REG), ctrl_word);
+
+    return true;
+}
+
+bool chinch_peek(
+    const uint32_t addr,
+    uint32_t* data,
+    bool half_word,
+    uint32_t timeout
+)
+{
+    //Build transaction control word
+    uint32_t ctrl_word = 0, i;
+    ctrl_word |= (addr & PCIE_CTRL_REG_ADDR_MASK);
+    if (half_word) ctrl_word |= PCIE_CTRL_REG_HALF_WORD;
+    ctrl_word |= PCIE_CTRL_REG_READ;
+
+    //Wait for space in the transaction queue or timeout
+    i = 0;
+    while ((wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_STATUS_REG)) & PCIE_STATUS_REG_BUSY) != 0) {
+        if (++i > timeout) return false;
+    }
+
+    //Flush transaction control register
+    if (data) *data = 0;
+    wb_poke32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_CTRL_REG), ctrl_word);
+
+    //Wait for read completion or timeout
+    i = 0;
+    while ((wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_STATUS_REG)) & PCIE_STATUS_REG_READ_PENDING) != 0) {
+        if (++i > timeout) return false;
+    }
+    //Read transaction data register
+    if (data) *data = wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_RESP_REG));
+    return true;
+}
+
+//-----------------------------------------------------
+// Flash access
+//-----------------------------------------------------
+
+uint32_t    g_cached_win_reg0;
+uint32_t    g_cached_win_reg1;
+
+bool chinch_flash_init()
+{
+    chinch_peek32(CHINCH_FLASH_WINDOW_REG0, &g_cached_win_reg0);
+    chinch_peek32(CHINCH_FLASH_WINDOW_REG1, &g_cached_win_reg1);
+
+    bool status = true, passed = true;
+    STATUS_MERGE(chinch_poke32(CHINCH_FLASH_WINDOW_REG0, CHINCH_FLASH_WINDOW_BASE | CHINCH_FLASH_WINDOW_CONF), status);
+
+    //Run a loopback test to ensure that we will not corrupt the flash.
+    STATUS_MERGE(chinch_poke32(0x200, 0xDEADBEEF), status);
+    STATUS_MERGE(chinch_poke16(0x204, 0x5678), status);
+    uint32_t reg_val;
+    STATUS_MERGE(chinch_peek16(0x0, &reg_val), status);
+    STATUS_MERGE(chinch_poke16(0x206, reg_val), status);
+    STATUS_MERGE(chinch_peek32(0x200, &reg_val), status);
+    passed &= (reg_val == 0xDEADBEEF);
+    STATUS_MERGE(chinch_peek32(0x204, &reg_val), status);
+    passed &= (reg_val == 0x7AD05678);
+
+    return status && passed;
+}
+
+void chinch_flash_cleanup()
+{
+    chinch_poke32(CHINCH_FLASH_WINDOW_REG0, g_cached_win_reg0);
+    chinch_poke32(CHINCH_FLASH_WINDOW_REG1, g_cached_win_reg1);
+}
+
+bool chinch_flash_select_sector(uint32_t sector)
+{
+    return chinch_poke32(CHINCH_FLASH_WINDOW_REG1, sector * CHINCH_FLASH_WINDOW_SIZE);
+}
+
+bool chinch_flash_erase_sector()
+{
+    bool status = true;
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_5555_REG,    0x00AA), status);    //Unlock #1
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_2AAA_REG,    0x0055), status);    //Unlock #2
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_5555_REG,    0x0080), status);    //Setup
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_5555_REG,    0x00AA), status);    //Unlock #1
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_2AAA_REG,    0x0055), status);    //Unlock #2
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_WINDOW_BASE, 0x0030), status);    //Erase
+
+    if (status) {
+        uint32_t read_data;
+        while (true) {
+            status = chinch_peek16(CHINCH_FLASH_WINDOW_BASE, &read_data);    //Wait for sector to erase
+            if (((read_data & 0xFFFF) == 0xFFFF) || !status) break;
+        }
+    }
+    return status;
+}
+
+bool chinch_flash_read_buf(uint32_t offset, uint16_t* buf, uint32_t size)
+{
+    bool status = true;
+    uint32_t base_addr = CHINCH_FLASH_WINDOW_BASE | (offset & 0x3FFFF);
+    for (uint32_t i = 0; (i < size) && status; i++) {
+        uint32_t word;
+        STATUS_CHAIN(chinch_peek16(base_addr + (i * 2), &word), status);
+        buf[i] = (uint16_t)word;
+    }
+    return status;
+}
+
+bool chinch_flash_write_buf(uint32_t offset, uint16_t* buf, uint32_t size)
+{
+    if (size > CHINCH_FLASH_MAX_BUF_WRITES || buf == 0) return false;
+    bool status = true;
+
+    //Setup buffered write
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_5555_REG,    0x00AA), status);      //Unlock #1
+    STATUS_MERGE(chinch_poke16(CHINCH_FLASH_2AAA_REG,    0x0055), status);      //Unlock #2
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_WINDOW_BASE, 0x0025), status);      //Setup write
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_WINDOW_BASE, size - 1), status);    //Num words
+
+    //Write the data
+    uint32_t base_addr = CHINCH_FLASH_WINDOW_BASE | (offset & 0x3FFFF);
+    for (uint32_t i = 0; i < size; i++) {
+        STATUS_CHAIN(chinch_poke16(base_addr + (i * 2), buf[i]), status);
+    }
+
+    //Commit write and poll until data is written
+    STATUS_CHAIN(chinch_poke16(CHINCH_FLASH_WINDOW_BASE, 0x0029), status);
+    if (status) {
+        uint16_t read_data;
+        while (true) {
+            STATUS_MERGE(chinch_flash_read(base_addr, &read_data), status);    //Wait for write to finish
+            if ((read_data == buf[0]) || !status) break;
+        }
+    }
+    return status;
+}
+
+//-----------------------------------------------------
+// FPGA Configuration
+//-----------------------------------------------------
+void chinch_start_config()
+{
+    chinch_poke32(CHINCH_FPGA_CONFIG_REG, 0x1);
+}
+
+config_status_t chinch_get_config_status()
+{
+    bool status = true;
+    uint32_t read_data;
+    STATUS_MERGE(chinch_peek32(CHINCH_FPGA_CONFIG_REG, &read_data), status);
+    return status ? (config_status_t)read_data : CHINCH_CONFIG_ERROR;
+}
+
+//-----------------------------------------------------
+// Read-back interface for the user initiated
+// PCIe register transactions
+//-----------------------------------------------------
+pcie_register_xact_t    g_pcie_reg_xact_info;
+uint32_t                g_pcie_res_timeout;
+
+bool _respond_to_pcie_xact_request(uint32_t response, uint32_t timeout)
+{
+    //Wait for space in the transaction queue or timeout
+    uint32_t i = 0;
+    while ((wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_STATUS_REG)) & PCIE_STATUS_REG_BUSY) != 0) {
+        if (++i > g_pcie_res_timeout) return false;
+    }
+
+    //First write data and then the control register to ensure coherency
+    wb_poke32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_DATA_REG), response);
+    wb_poke32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_CTRL_REG), PCIE_CTRL_REG_READ_RESP);
+
+    return true;
+}
+
+bool check_pcie_user_regport(pcie_register_xact_t** xact_info_hdl)
+{
+    //Check for pending transaction requests
+    if ((wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_STATUS_REG)) & PCIE_STATUS_REG_REQ_PENDING) != 0) {
+        //Attach responder to transaction info
+        g_pcie_reg_xact_info.respond = _respond_to_pcie_xact_request;
+
+        //First read data and then the control register to ensure coherency
+        g_pcie_reg_xact_info.data = wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_DATA_REG));
+        uint32_t xact_control = wb_peek32(SR_ADDR(PCIE_MSG_REG_BASE, PCIE_MSG_CTRL_REG));
+
+        g_pcie_reg_xact_info.addr = xact_control & PCIE_CTRL_REG_ADDR_MASK;
+        g_pcie_reg_xact_info.size =
+            (xact_control & PCIE_CTRL_REG_HALF_WORD) == 0 ? PCIE_XACT_32_BIT : PCIE_XACT_16_BIT;
+        if ((xact_control & PCIE_CTRL_REG_READ) != 0)
+            g_pcie_reg_xact_info.type = PCIE_XACT_READ;
+        else if ((xact_control & PCIE_CTRL_REG_WRITE) != 0)
+            g_pcie_reg_xact_info.type = PCIE_XACT_WRITE;
+        else
+            g_pcie_reg_xact_info.type = PCIE_XACT_ERROR;
+
+        *xact_info_hdl = &g_pcie_reg_xact_info;
+        return true;
+    } else {
+        *xact_info_hdl = 0;
+        return false;
+    }
+}
+
+bool forward_pcie_user_xact_to_wb()
+{
+    pcie_register_xact_t* xact_info;
+    if (check_pcie_user_regport(&xact_info)) {
+        if (xact_info->size == PCIE_XACT_32_BIT) {
+            //Only respond to 32-bit transactions because that is all the LVFPGA interface can send
+            if (xact_info->type == PCIE_XACT_WRITE) {
+                wb_poke32(xact_info->addr, xact_info->data);
+                return true;
+            } else if (xact_info->type == PCIE_XACT_READ) {
+                return xact_info->respond(wb_peek32(xact_info->addr), CHINCH_DEFAULT_XACT_TIMEOUT);
+            }
+        }
+    }
+    return false;
+}
+
+
+
diff --git a/firmware/x300/lib/ethernet.c b/firmware/x300/lib/ethernet.c
new file mode 100644
index 000000000..806a3840d
--- /dev/null
+++ b/firmware/x300/lib/ethernet.c
@@ -0,0 +1,639 @@
+/*
+ * Copyright 2007,2009 Free Software Foundation, Inc.
+ * Copyright 2009 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "../x300/x300_defs.h"
+#include "ethernet.h"
+#include "mdelay.h"
+#include "printf.h"
+#include "wb_i2c.h"
+#include "wb_utils.h"
+//#include "memory_map.h"
+//#include "eth_phy.h"
+//#include "pic.h"
+//#include "hal_io.h"
+//#include "nonstdio.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include "xge_phy.h"
+#include "xge_mac.h"
+#include <u3_net_stack.h>
+
+
+
+
+#define VERBOSE 0
+
+#define	NETHS	2	// # of ethernet interfaces
+
+static bool links_up[NETHS] = {};
+
+////////////////////////////////////////////////////////////////////////
+//
+// 10 Gig Ethernet MAC.
+//
+typedef struct {
+  volatile uint32_t config;             // WO
+  volatile uint32_t int_pending;        // Clear-on-read
+  volatile uint32_t int_status;         // RO
+  volatile uint32_t int_mask;           // RW
+  volatile uint32_t mdio_data;
+  volatile uint32_t mdio_addr;
+  volatile uint32_t mdio_op;
+  volatile uint32_t mdio_control;
+  volatile uint32_t gpio;
+} xge_regs_t;
+
+#define xge_regs ((xge_regs_t *) base)
+
+#define SFPP_STATUS_MODABS_CHG     (1 << 5)    // Has MODABS changed since last read?
+#define SFPP_STATUS_TXFAULT_CHG    (1 << 4)    // Has TXFAULT changed since last read?
+#define SFPP_STATUS_RXLOS_CHG      (1 << 3)    // Has RXLOS changed since last read?
+#define SFPP_STATUS_MODABS         (1 << 2)    // MODABS state
+#define SFPP_STATUS_TXFAULT        (1 << 1)    // TXFAULT state
+#define SFPP_STATUS_RXLOS          (1 << 0)    // RXLOS state
+
+
+int
+ethernet_ninterfaces(void)
+{
+  return NETHS;
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+// Clause 45 MDIO used for 10Gig Ethernet has two bus transactions to complete a transfer.
+// An initial transaction sets up the address, and a subsequent one transfers the read or write data.
+//
+static uint32_t 
+xge_read_mdio(const uint32_t base, const uint32_t address, const uint32_t device, const uint32_t port)
+{
+  // Set register address each iteration
+  xge_regs->mdio_addr = address;
+  // Its a clause 45 device. We want to ADDRESS
+  xge_regs->mdio_op = XGE_MDIO_CLAUSE(CLAUSE45) | XGE_MDIO_OP(MDIO_ADDRESS) | XGE_MDIO_ADDR(port) | XGE_MDIO_MMD(device);
+  // Start MDIO bus transaction
+  xge_regs->mdio_control = 1;
+  // Wait until bus transaction complete
+  while (xge_regs->mdio_control == 1);
+  // Its a clause 45 device. We want to READ
+  xge_regs->mdio_op = XGE_MDIO_CLAUSE(CLAUSE45) | XGE_MDIO_OP(MDIO_READ) | XGE_MDIO_ADDR(port) | XGE_MDIO_MMD(device);
+  // Start MDIO bus transaction
+  xge_regs->mdio_control = 1;
+  // Wait until bus transaction complete
+  while (xge_regs->mdio_control == 1);
+  // Read MDIO data
+  return(xge_regs->mdio_data);
+}
+
+static void 
+xge_write_mdio(const uint32_t base, const uint32_t address, const uint32_t device, const uint32_t port, const uint32_t data)
+{  
+  // Set register address each iteration
+  xge_regs->mdio_addr = address;
+  // Its a clause 45 device. We want to ADDRESS
+  xge_regs->mdio_op = XGE_MDIO_CLAUSE(CLAUSE45) | XGE_MDIO_OP(MDIO_ADDRESS) | XGE_MDIO_ADDR(port) | XGE_MDIO_MMD(device);
+  // Start MDIO bus transaction
+  xge_regs->mdio_control = 1;
+  // Wait until bus transaction complete
+  while (xge_regs->mdio_control == 1);
+  // Write new value to mdio_write_data reg. 
+  xge_regs->mdio_data = data; 
+  // Its a clause 45 device. We want to WRITE 
+  xge_regs->mdio_op = XGE_MDIO_CLAUSE(CLAUSE45) | XGE_MDIO_OP(MDIO_WRITE) | XGE_MDIO_ADDR(port) | XGE_MDIO_MMD(device);
+  // Start MDIO bus transaction 
+  xge_regs->mdio_control = 1; 
+  // Wait until bus transaction complete  
+  while (xge_regs->mdio_control == 1);
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+// Clause 22 MDIO used for 1Gig Ethernet has one bus transaction to complete a transfer.
+//
+static uint32_t 
+ge_read_mdio(const uint32_t base, const uint32_t address, const uint32_t port)
+{
+  // Its a clause 22 device. We want to READ
+  xge_regs->mdio_op = XGE_MDIO_CLAUSE(CLAUSE22) | XGE_MDIO_OP(MDIO_C22_READ) | XGE_MDIO_ADDR(port) | address;
+  // Start MDIO bus transaction
+  xge_regs->mdio_control = 1;
+  // Wait until bus transaction complete
+  while (xge_regs->mdio_control == 1);
+  // Read MDIO data
+  return(xge_regs->mdio_data);
+}
+
+static void 
+ge_write_mdio(const uint32_t base, const uint32_t address, const uint32_t port, const uint32_t data)
+{
+  // Write new value to mdio_write_data reg. 
+  xge_regs->mdio_data = data; 
+  // Its a clause 22 device. We want to WRITE 
+  xge_regs->mdio_op = XGE_MDIO_CLAUSE(CLAUSE22) | XGE_MDIO_OP(MDIO_C22_WRITE) | XGE_MDIO_ADDR(port) | address;
+  // Start MDIO bus transaction 
+  xge_regs->mdio_control = 1; 
+  // Wait until bus transaction complete  
+  while (xge_regs->mdio_control == 1);
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+// Read and write MDIO independent of type
+//
+
+static uint32_t read_mdio(const uint8_t eth, const uint32_t address, const uint32_t device, const uint32_t port)
+{
+    const uint32_t rb_addr = (eth==0) ? RB_ETH_TYPE0 : RB_ETH_TYPE1;
+    const uint32_t base = (eth==0) ? XGE0_BASE : XGE1_BASE;
+    if (wb_peek32(SR_ADDR(RB0_BASE, rb_addr)) != 0)
+    {
+        return xge_read_mdio(base, address, device, port);
+    }
+    else
+    {
+        return ge_read_mdio(base, address, port);
+    }
+}
+
+static void write_mdio(const uint8_t eth, const uint32_t address, const uint32_t device, const uint32_t port, const uint32_t data)
+{
+    const uint32_t rb_addr = (eth==0) ? RB_ETH_TYPE0 : RB_ETH_TYPE1;
+    const uint32_t base = (eth==0) ? XGE0_BASE : XGE1_BASE;
+    if (wb_peek32(SR_ADDR(RB0_BASE, rb_addr)) != 0)
+    {
+        return xge_write_mdio(base, address, device, port, data);
+    }
+    else
+    {
+        return ge_write_mdio(base, address, port, data);
+    }
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+// Read an 8-bit word from a device attached to the PHY's i2c bus.
+//
+static int
+xge_i2c_rd(const uint32_t base, const uint8_t i2c_dev_addr, const uint8_t i2c_word_addr)
+{
+  uint8_t buf;
+  // IJB. CHECK HERE FOR MODET. Bail immediately if no module
+
+  // SFF-8472 defines a hardcoded bus address of 0xA0, an 8bit internal address and a register map.
+  // Write the random access address to the SPF module
+  if (wb_i2c_write(base, i2c_dev_addr, &i2c_word_addr, 1) == false)
+    return(-1);
+
+  // Now read back a byte of data
+  if (wb_i2c_read(base, i2c_dev_addr, &buf, 1) == false)
+    return(-1);
+  
+  return((int) buf);
+}
+
+////////////////////////////////////////////////////////////////////////
+//
+// Read identity of SFP+ module for XGE PHY
+//
+// (base is i2c controller)
+static int
+xge_read_sfpp_type(const uint32_t base, const uint32_t delay_ms)
+{
+  int x;
+ // Delay read of SFPP
+  if (delay_ms)
+    mdelay(delay_ms);
+  // Read ID code from SFP
+  x = xge_i2c_rd(base, MODULE_DEV_ADDR, 3);
+  // I2C Error?
+  if (x < 0) {
+    printf("DEBUG: I2C error in SFPP_TYPE.\n");
+    return x;
+    }
+  // Decode module type. These registers and values are defined in SFF-8472
+  if (x & 0x01) // Active 1X Infinband Copper
+    {
+      goto twinax;
+    }
+  if (x & 0x10)
+    {
+      printf("DEBUG: SFFP_TYPE_SR.\n");
+      return SFFP_TYPE_SR;
+    }
+  if (x & 0x20)
+    {
+      printf("DEBUG: SFFP_TYPE_LR.\n");
+      return SFFP_TYPE_LR;
+    }
+  if (x & 0x40)
+    {
+      printf("DEBUG: SFFP_TYPE_LRM.\n");
+      return SFFP_TYPE_LRM;
+    }
+  // Search for legacy 1000-Base SFP types
+  x = xge_i2c_rd(base, MODULE_DEV_ADDR, 0x6);
+  if (x < 0) {
+    printf("DEBUG: I2C error in SFPP_TYPE.\n");
+    return x;
+  }
+  if (x & 0x01) {
+    printf("DEBUG: SFFP_TYPE_1000BASE_SX.\n");
+    return SFFP_TYPE_1000BASE_SX;
+  }
+  if (x & 0x02) {
+    printf("DEBUG: SFFP_TYPE_1000BASE_LX.\n");
+    return SFFP_TYPE_1000BASE_LX;
+  }
+  if (x & 0x08) {
+    printf("DEBUG: SFFP_TYPE_1000BASE_T.\n");
+    return SFFP_TYPE_1000BASE_T;
+  }
+  // Not one of the standard optical types..now try to deduce if it's twinax aka 10GSFP+CU
+  // which is not covered explicitly in SFF-8472
+  x = xge_i2c_rd(base, MODULE_DEV_ADDR, 8);
+  if (x < 0) {
+    printf("DEBUG: I2C error in SFPP_TYPE.\n");
+    return x;
+  }
+  if ((x & 4) == 0) // Passive SFP+ cable type
+    goto unknown;
+//  x = xge_i2c_rd(MODULE_DEV_ADDR, 6);
+//   printf("SFP+ reg6 read as %x\n",x);
+//  if (x < 0)
+//    return x;
+//  if (x != 0x04)  // Returns  1000Base-CX as Compliance code
+//    goto unknown;
+  x = xge_i2c_rd(base, MODULE_DEV_ADDR, 0xA);
+  if (x < 0) {
+    printf("DEBUG: I2C error in SFPP_TYPE.\n");
+    return x;
+  }
+  if (x & 0x80) {
+  twinax:
+    // Reports 1200 MBytes/sec fibre channel speed..close enough to 10G ethernet!
+    x = xge_i2c_rd(base, MODULE_DEV_ADDR, 0x12);
+
+    if (x < 0) {
+      printf("DEBUG: I2C error in SFPP_TYPE.\n");
+      return x;
+    }
+    printf("DEBUG: TwinAx.\n");
+    // If cable length support is greater than 10M then pick correct type
+    return x > 10 ? SFFP_TYPE_TWINAX_LONG : SFFP_TYPE_TWINAX;
+  }
+unknown:
+  printf("DEBUG: Unknown SFP+ type.\n");
+  // Not a supported Module type
+  return SFFP_TYPE_UNKNOWN;
+}
+
+
+// Pull  reset line low for 100ms then release and wait 100ms
+static void
+xge_hard_phy_reset(const uint32_t base)
+{
+  wb_poke32(base, 1);
+  mdelay(100);
+  wb_poke32(base, 0);
+  mdelay(100);
+
+}
+
+static void
+xge_mac_init(const uint32_t base)
+{
+  printf("INFO: Begining XGE MAC init sequence.\n");
+  xge_regs->config =  XGE_TX_ENABLE;
+}
+
+// base is pointer to XGE MAC on Wishbone.
+static void
+xge_phy_init(const uint8_t eth, const uint32_t mdio_port)
+{
+  int x;
+  // Read LASI Ctrl register to capture state.
+  //y = xge_read_mdio(0x9002,XGE_MDIO_DEVICE_PMA,XGE_MDIO_ADDR_PHY_A);
+  printf("INFO: Begining XGE PHY init sequence.\n");
+  // Software reset
+  x = read_mdio(eth, 0x0, XGE_MDIO_DEVICE_PMA,mdio_port);
+  x = x | (1 << 15); 
+  write_mdio(eth, 0x0,XGE_MDIO_DEVICE_PMA,mdio_port,x);  
+  //FIXME uncomment lines below when 1gigE MDIO works
+  //while(x&(1<<15)) 
+  //  x = read_mdio(eth, 0x0,XGE_MDIO_DEVICE_PMA,mdio_port);
+}
+
+void
+xge_poll_sfpp_status(const uint32_t eth)
+{   
+  uint32_t x;
+  // Has MODDET/MODAbS changed since we last looked?
+  x = wb_peek32(SR_ADDR(RB0_BASE, (eth==0) ? RB_SFPP_STATUS0 : RB_SFPP_STATUS1 ));
+
+  if (x & SFPP_STATUS_RXLOS_CHG)
+    printf("DEBUG: eth%1d RXLOS changed state: %d\n", eth, x & SFPP_STATUS_RXLOS);
+  if (x & SFPP_STATUS_TXFAULT_CHG)
+    printf("DEBUG: eth%1d TXFAULT changed state: %d\n", eth,(x & SFPP_STATUS_TXFAULT) >> 1 );
+  if (x & SFPP_STATUS_MODABS_CHG)
+    printf("DEBUG: eth%1d MODABS changed state: %d\n", eth, (x & SFPP_STATUS_MODABS) >> 2);
+
+  if (x & (SFPP_STATUS_RXLOS_CHG|SFPP_STATUS_TXFAULT_CHG|SFPP_STATUS_MODABS_CHG))
+    if (( x & (SFPP_STATUS_RXLOS|SFPP_STATUS_TXFAULT|SFPP_STATUS_MODABS)) == 0) {
+	xge_ethernet_init(eth);
+	dump_mdio_regs((eth==0) ? XGE0_BASE : XGE1_BASE,MDIO_PORT);
+	mdelay(100);
+	dump_mdio_regs((eth==0) ? XGE0_BASE : XGE1_BASE,MDIO_PORT);
+	mdelay(100);
+	dump_mdio_regs((eth==0) ? XGE0_BASE : XGE1_BASE,MDIO_PORT);
+      }
+
+  if (x & SFPP_STATUS_MODABS_CHG) {
+    // MODDET has changed state since last checked
+    if (x & SFPP_STATUS_MODABS) {
+      // MODDET is high, module currently removed.
+      printf("INFO: An SFP+ module has been removed from eth port %d.\n", eth);
+    } else {
+      // MODDET is low, module currently inserted.
+      // Return status.
+      printf("INFO: A new SFP+ module has been inserted into eth port %d.\n", eth);
+      xge_read_sfpp_type((eth==0) ? I2C0_BASE : I2C2_BASE,1);
+    }
+  }
+
+    //update the link up status
+    const bool old_link_up = links_up[eth];
+    links_up[eth] = ((read_mdio(eth, XGE_MDIO_STATUS1,XGE_MDIO_DEVICE_PMA,MDIO_PORT)) & (1 << 2)) != 0;
+    //The link became up, send a GARP so everyone knows our mac/ip association
+    if (!old_link_up && links_up[eth]) u3_net_stack_send_arp_request(eth, u3_net_stack_get_ip_addr(eth));
+}
+  
+
+void
+xge_ethernet_init(const uint32_t eth)
+{ 
+  xge_mac_init((eth==0) ? XGE0_BASE : XGE1_BASE); 
+ //xge_hard_phy_reset();  
+  xge_phy_init(eth ,MDIO_PORT);    
+  uint32_t x = wb_peek32(SR_ADDR(RB0_BASE, (eth==0) ? RB_SFPP_STATUS0 : RB_SFPP_STATUS1 ));
+  printf(" eth%1d SFP initial state: RXLOS: %d  TXFAULT: %d  MODABS: %d\n",
+	 eth,
+	 x & SFPP_STATUS_RXLOS,
+	 (x & SFPP_STATUS_TXFAULT) >> 1,
+	 (x & SFPP_STATUS_MODABS) >> 2);
+}
+
+//
+// Debug code to verbosely read XGE MDIO registers below here.
+//
+
+
+void decode_reg(uint32_t address, uint32_t device, uint32_t data)
+{
+  int x;
+  printf("Device: ");
+  printf("%x",device);
+  printf("  ");
+  switch(address) {
+  case XGE_MDIO_CONTROL1: 
+    printf("CONTROL1: ");
+    printf("%x",data); printf("  ");
+    for (x=15; x >= 0 ; x--)
+      if ((data & (1 << x)) != 0)
+	// Bits set.
+	switch(x) {
+	case 15: printf("Reset,"); break;
+	case 14: printf("Loopback,"); break;
+	case 11: printf("Low Power Mode,"); break;
+	case 5:case 4:case 3:case 2: printf("RESERVED speed value,"); break;
+	case 0: printf("PMA loopback,"); break;
+	} //else 
+	// Bits clear.
+	//switch (x) {
+	//case 13: case 6: printf(" None 10Gb/s speed set!"); break;
+	//}
+    printf(" \n");
+    break;
+  case XGE_MDIO_STATUS1:
+    printf("STATUS1: ");
+    printf("%x",data); printf("  ");
+    for (x=15; x >= 0 ; x--)
+      if ((data & (1 << x)) != 0)
+	// Bits set.
+	switch(x) {
+	case 7: printf("Fault Detected,"); break;
+	case 2: printf("Link is Up,"); break;
+	case 1: printf("Supports Low Power,"); break;
+	} else 
+	// Bits Clear
+	switch(x) {
+	case 2: printf("Link is Down,"); break;
+	}
+    printf(" \n");
+    break;
+  case XGE_MDIO_SPEED:
+    printf("SPEED ABILITY: ");
+    printf("%x",data); printf("  ");
+    for (x=15; x >= 0 ; x--)
+      if ((data & (1 << x)) != 0)
+	// Bits set.
+	switch(x) {
+	case 15:case 14:case 13:case 12:case 11:case 10:case 9:
+	case 8:case 7:case 6:case 5:case 4:case 3:case 2:case 1: printf("RESERVED bits set!,"); break;
+	case 0: printf("Capable of 10Gb/s,");
+	} else 
+	// Bits clear.
+	switch(x) {
+	case 0: printf("Incapable of 10Gb/s,"); break;
+	}
+    printf(" \n");
+    break;
+  case XGE_MDIO_DEVICES1:
+    printf("DEVICES IN PACKAGE: ");
+    printf("%x",data); printf("  ");
+    for (x=15; x >= 0 ; x--)
+      if ((data & (1 << x)) != 0)
+	// Bits set.
+	switch(x) {
+	case 7: printf("Auto-Negotiation,"); break;
+	case 6: printf("TC,"); break;
+ 	case 5: printf("DTE XS,"); break;
+	case 4: printf("PHY XS,"); break;
+	case 3: printf("PCS,"); break;
+	case 2: printf("WIS,"); break;
+	case 1: printf("PMD/PMA,"); break;
+	case 0: printf("Clause 22 registers,"); break;
+	}
+    printf(" \n");
+    break;
+  case XGE_MDIO_DEVICES2:
+    printf("DEVICES IN PACKAGE (cont): ");
+    printf("%x",data); printf("  ");
+    for (x=15; x >= 0 ; x--)
+      if ((data & (1 << x)) != 0)
+	// Bits set.
+	switch(x) {
+	case 15: printf("Vendor device 2,"); break;
+	case 14: printf("Vendor device 1,"); break;
+	case 13: printf("Clause 22 extension,"); break;
+	}
+    printf(" \n");
+    break;
+  case XGE_MDIO_CONTROL2:
+    printf("CONTROL2: ");
+    printf("%x",data); printf("  ");
+    // PMA/PMD
+    if (device == XGE_MDIO_DEVICE_PMA)
+      switch((data & 0xf)) {
+      case 0xF: printf("10BASE-T,"); break;
+      case 0xE: printf("100BASE-TX,"); break;
+      case 0xD: printf("1000BASE-KX,"); break;
+      case 0xC: printf("1000BASE-T,"); break;
+      case 0xB: printf("10GBASE-KR,"); break;
+      case 0xA: printf("10GBASE-KX4,"); break;
+      case 0x9: printf("10GBASE-T,"); break;
+      case 0x8: printf("10GBASE-LRM,"); break;
+      case 0x7: printf("10GBASE-SR,"); break;
+      case 0x6: printf("10GBASE-LR,"); break;
+      case 0x5: printf("10GBASE-ER,"); break;
+      case 0x4: printf("10GBASE-LX4,"); break;
+	//     case 0x3: printf("10GBASE-SW,"); break;
+	//      case 0x2: printf("10GBASE-LW,"); break;
+	//     case 0x1: printf("10GBASE-EW,"); break;
+      case 0x0: printf("10GBASE-CX4,"); break;
+      } else if (device == XGE_MDIO_DEVICE_PCS)
+      // PCS
+      switch((data & 0x3)) {
+      case 0x3: printf("10GBASE-T PCS,"); break;
+      case 0x2: printf("10GBASE-W PCS,"); break;
+      case 0x1: printf("10GBASE-X PCS,"); break;
+      case 0x0: printf("10GBASE-R PCS,"); break;
+      }
+    printf(" \n");
+    break;
+  case XGE_MDIO_STATUS2:
+    printf("STATUS2: ");
+    printf("%x",data); printf("  ");
+    for (x=15; x >= 0 ; x--)
+      if ((data & (1 << x)) != 0)
+	// Bits set.
+	switch(x) {
+	case 15: if ((data & (1 << 14)) == 0) printf("Device responding,"); break;
+	case 13: if (device == XGE_MDIO_DEVICE_PMA) printf("Able detect a Tx fault,"); break;
+	case 12: if (device == XGE_MDIO_DEVICE_PMA) printf("Able detect an Rx fault,"); break;
+	case 11: printf("Fault on Tx path,"); break;
+	case 10: printf("Fault on Rx path,"); break;
+	case 9:  if (device == XGE_MDIO_DEVICE_PMA) printf("Extended abilities in Reg1.11,"); break;
+	case 8:  if (device == XGE_MDIO_DEVICE_PMA) printf("Able to disable TX,"); break;
+	case 7:  if (device == XGE_MDIO_DEVICE_PMA) printf("10GBASE-SR,"); break;
+	case 6:  if (device == XGE_MDIO_DEVICE_PMA) printf("10GBASE-LR,"); break;
+	case 5:  if (device == XGE_MDIO_DEVICE_PMA) printf("10GBASE-ER,"); break;
+	case 4:  if (device == XGE_MDIO_DEVICE_PMA) printf("10GBASE-LX4,"); break;
+	case 3:  if (device == XGE_MDIO_DEVICE_PMA) printf("10GBASE-SW,"); break;
+	case 2:  if (device == XGE_MDIO_DEVICE_PMA) printf("10GBASE-LW,"); break;
+	case 1:  if (device == XGE_MDIO_DEVICE_PMA) printf("10GBASE-EW,"); break;
+	case 0:  if (device == XGE_MDIO_DEVICE_PMA) printf("loopback,"); break;
+	}
+    printf(" \n");
+    break;
+  case XGE_MDIO_LANESTATUS:
+    printf("LANE STATUS: ");
+    printf("%x",data); printf("  ");
+    for (x=15; x >= 0 ; x--)
+      if ((data & (1 << x)) != 0)
+	// Bits set.
+	switch(x) {
+	case 12: printf("Lanes aligned,"); break;
+	case 11: printf("Able to generate test patterns,"); break;
+	case 3:  printf("Lane 3 synced,"); break;
+	case 2:  printf("Lane 2 synced,"); break;
+	case 1:  printf("Lane 1 synced,"); break;
+	case 0:  printf("Lane 0 synced,"); break;
+	} else
+	// Bits clear
+	switch(x) {
+ 	case 3:  printf("Lane 3 not synced,"); break;
+	case 2:  printf("Lane 2 not synced,"); break;
+	case 1:  printf("Lane 1 not synced,"); break;
+	case 0:  printf("Lane 0 not synced,"); break;
+	} 
+    printf(" \n");
+    break;
+  case XILINX_CORE_VERSION:
+    printf("XILINX CORE VERSION: %x  ",data);
+    printf("Version: %d.%d ",(data&0xf000)>>12,(data&0xf00)>>8);
+    printf("Patch: %d ",(data&0xE)>>1);
+    if (data&0x1) printf("Evaluation Version of core");
+    printf("\n");
+    break;
+  default:
+    printf("Register @ address: ");
+    printf("%x",address);
+    printf(" has value: ");
+    printf("%x\n",data);
+    break;
+  }
+}
+
+void 
+dump_mdio_regs(const uint8_t eth, uint32_t mdio_port)
+{
+    volatile unsigned int x;
+    int y;
+    unsigned int regs_a[9] = {0,1,4,5,6,7,8,32,33};
+    unsigned int regs_b[10] = {0,1,4,5,6,7,8,10,11,65535};
+   
+    printf("\n");
+
+    for (y = 0; y < 10; y++)       
+	{
+	  // Read MDIO data
+	  x = read_mdio(eth,regs_b[y],XGE_MDIO_DEVICE_PMA,mdio_port);
+	  decode_reg(regs_b[y],XGE_MDIO_DEVICE_PMA,x);
+	}
+    
+      for (y = 0; y < 9; y++)
+	{
+	  // Read MDIO data
+	  x = read_mdio(eth,regs_a[y],XGE_MDIO_DEVICE_PCS,mdio_port);
+	  decode_reg(regs_a[y],XGE_MDIO_DEVICE_PCS,x);
+	}
+
+     printf("\n");
+
+      /* for (y = 0; y < 8; y++) */
+      /* 	{ */
+      /* 	  // Read MDIO data */
+      /* 	  x = xge_read_mdio(base,regs_a[y],XGE_MDIO_DEVICE_PHY_XS,mdio_port); */
+      /* 	  decode_reg(regs_a[y],XGE_MDIO_DEVICE_PHY_XS,x); */
+      /* 	}  */
+
+      /* for (y = 0; y < 8; y++) */
+      /* 	{ */
+      /* 	  // Read MDIO data */
+      /* 	  x = xge_read_mdio(base,regs_a[y],XGE_MDIO_DEVICE_DTE_XS,mdio_port); */
+      /* 	  decode_reg(regs_a[y],XGE_MDIO_DEVICE_DTE_XS,x); */
+      /* 	} */
+}
+
+bool ethernet_get_link_up(const uint32_t eth)
+{
+    return links_up[eth];
+}
diff --git a/firmware/x300/lib/link_state_route_proto.c b/firmware/x300/lib/link_state_route_proto.c
new file mode 100644
index 000000000..30cfd73cb
--- /dev/null
+++ b/firmware/x300/lib/link_state_route_proto.c
@@ -0,0 +1,441 @@
+
+// Copyright 2013 Ettus Research LLC
+
+#include <link_state_route_proto.h>
+#include <u3_net_stack.h>
+#include <ethernet.h>
+#include <string.h>
+#include <printf.h>
+#include <print_addrs.h>
+
+#define lengthof(a) (sizeof(a)/sizeof(*(a)))
+
+/***********************************************************************
+ * global constants
+ **********************************************************************/
+#define LS_PROTO_VERSION 6
+
+//shift the proto version into the ID so only matching fw responds
+#define LS_ID_DISCOVER  (0 | (8 << LS_PROTO_VERSION))
+#define LS_ID_INFORM    (1 | (8 << LS_PROTO_VERSION))
+
+#define LS_PAYLOAD_MTU 1024
+#define LS_NUM_NBOR_ENTRIES 16
+#define LS_NUM_NODE_ENTRIES 64
+#define LS_NUM_MAP_ENTRIES 128
+
+#define NETHS 4 //max eths supported in this file
+
+/***********************************************************************
+ * wire format for table communication
+ **********************************************************************/
+typedef struct
+{
+    uint32_t num_nbors; //number of entries in neighbors list
+    uint32_t num_ports; //first few neighbors are local ports
+    struct ip_addr node;
+    struct ip_addr nbors[];
+} ls_data_t;
+
+static inline size_t sizeof_ls_data(const ls_data_t *ls_data)
+{
+    return 0
+        + sizeof(uint32_t)/*num neighbors*/
+        + sizeof(uint32_t)/*num ports*/
+        + sizeof(struct ip_addr)/*source node*/
+        + sizeof(struct ip_addr)*ls_data->num_nbors;
+}
+
+/***********************************************************************
+ * sequence and tick counter monitor
+ **********************************************************************/
+static uint16_t ticker = 0;
+
+void link_state_route_proto_tick(void)
+{
+    ticker++;
+}
+
+static inline bool is_tick_expired(const uint16_t tick)
+{
+    const uint16_t delta = ticker - tick;
+    return delta > 2; //have not talked in a while, you are deaf to me
+}
+
+static uint16_t current_seq = 0;
+
+static inline bool is_seq_newer(const uint16_t seq, const uint16_t entry_seq)
+{
+    if (seq == entry_seq) return false; //not newer if equal
+    const uint16_t delta = seq - entry_seq;
+    return (delta & (1 << 15)) == 0; //newer when subtraction did not overflow
+}
+
+/***********************************************************************
+ * node entry api
+ **********************************************************************/
+typedef struct
+{
+    uint16_t seq;
+    uint16_t tick;
+    uint8_t ethno;
+    struct ip_addr ip_addr;
+} ls_node_entry_t;
+
+static bool ls_node_entry_valid(const ls_node_entry_t *entry)
+{
+    return entry->ip_addr.addr != 0 && !is_tick_expired(entry->tick);
+}
+
+static void ls_node_entry_update(ls_node_entry_t *entry, const int8_t ethno, const uint16_t seq, const struct ip_addr *ip_addr)
+{
+    entry->seq = seq;
+    entry->tick = ticker;
+    entry->ethno = ethno;
+    entry->ip_addr.addr = ip_addr->addr;
+}
+
+static bool ls_node_entries_update(
+    ls_node_entry_t *entries, const size_t num_entries,
+    const int8_t ethno, const uint16_t seq, const struct ip_addr *ip_addr
+)
+{
+    for (size_t i = 0; i < num_entries; i++)
+    {
+        if (!ls_node_entry_valid(&entries[i]))
+        {
+            ls_node_entry_update(entries+i, ethno, seq, ip_addr);
+            return true;
+        }
+
+        if (entries[i].ip_addr.addr == ip_addr->addr && entries[i].ethno == ethno)
+        {
+            if (is_seq_newer(seq, entries[i].seq))
+            {
+                ls_node_entry_update(entries+i, ethno, seq, ip_addr);
+                return true;
+            }
+            return false;
+        }
+    }
+
+    //no space, shift the table down and take entry 0
+    memmove(entries+1, entries, (num_entries-1)*sizeof(ls_node_entry_t));
+    ls_node_entry_update(entries+0, ethno, seq, ip_addr);
+    return true;
+}
+
+/***********************************************************************
+ * storage for nodes in the network
+ **********************************************************************/
+static ls_node_entry_t ls_nbors[LS_NUM_NBOR_ENTRIES];
+static ls_node_entry_t ls_nodes[LS_NUM_NODE_ENTRIES];
+
+/***********************************************************************
+ * node table
+ **********************************************************************/
+static ls_node_mapping_t ls_node_maps[LS_NUM_MAP_ENTRIES];
+
+const ls_node_mapping_t *link_state_route_get_node_mapping(size_t *length)
+{
+    *length = lengthof(ls_node_maps);
+    return ls_node_maps;
+}
+
+static void add_node_mapping(const struct ip_addr *node, const struct ip_addr *nbor)
+{
+    //printf("add_node_mapping: %s -> %s\n", ip_addr_to_str(node), ip_addr_to_str(nbor));
+
+    //write into the first available slot
+    for (size_t i = 0; i < lengthof(ls_node_maps); i++)
+    {
+        if (ls_node_maps[i].node.addr == 0)
+        {
+            ls_node_maps[i].node.addr = node->addr;
+            ls_node_maps[i].nbor.addr = nbor->addr;
+            return;
+        }
+    }
+
+    //otherwise, shift down the table and take slot0
+    memmove(ls_node_maps+1, ls_node_maps, sizeof(ls_node_maps) - sizeof(ls_node_mapping_t));
+    ls_node_maps[0].node.addr = node->addr;
+    ls_node_maps[0].nbor.addr = nbor->addr;
+}
+
+static void remove_node_matches(const struct ip_addr *node)
+{
+    //printf("remove_node_matches: %s\n", ip_addr_to_str(node));
+
+    for (size_t j = 0; j < lengthof(ls_node_maps); j++)
+    {
+        //if the address is a match, clear the entry
+        if (ls_node_maps[j].node.addr == node->addr)
+        {
+            ls_node_maps[j].node.addr = 0;
+            ls_node_maps[j].nbor.addr = 0;
+        }
+    }
+}
+
+static void update_node_mappings(const ls_data_t *ls_data)
+{
+    //printf("update_node_mappings: %s\n", ip_addr_to_str(&ls_data->node));
+
+    //remove any expired entries
+    for (size_t i = 0; i < lengthof(ls_nodes); i++)
+    {
+        if (ls_nodes[i].ip_addr.addr != 0 && is_tick_expired(ls_nodes[i].tick))
+        {
+            remove_node_matches(&ls_nodes[i].ip_addr);
+        }
+    }
+
+    //remove any matches for the current node
+    remove_node_matches(&ls_data->node);
+
+    //is this a local packet?
+    bool is_local = false;
+    for (size_t e = 0; e < ethernet_ninterfaces(); e++)
+    {
+        if (ls_data->node.addr == u3_net_stack_get_ip_addr(e)->addr) is_local = true;
+    }
+
+    //load entries from ls data into array
+    for (size_t i = 0; i < ls_data->num_nbors; i++)
+    {
+        if (is_local && i < ls_data->num_ports) continue; //ignore local ports
+        add_node_mapping(&ls_data->node, &ls_data->nbors[i]);
+    }
+}
+
+/***********************************************************************
+ * forward link state data onto all neighbors on the given port
+ **********************************************************************/
+static void send_link_state_data_to_all_neighbors(
+    const uint8_t ethno, const uint16_t seq, const ls_data_t *ls_data
+){
+    //exit and dont forward if the information is stale
+    if (!ls_node_entries_update(ls_nodes, lengthof(ls_nodes), ethno, seq, &ls_data->node)) return;
+
+    //update the mappings with new info
+    update_node_mappings(ls_data);
+
+    //forward to all neighbors
+    for (size_t i = 0; i < lengthof(ls_nbors); i++)
+    {
+        if (ls_nbors[i].ip_addr.addr == ls_data->node.addr) continue; //dont forward to sender
+        if (ls_node_entry_valid(&ls_nbors[i]))
+        {
+            if (ethernet_get_link_up(ls_nbors[i].ethno)) u3_net_stack_send_icmp_pkt(
+                ls_nbors[i].ethno, ICMP_IRQ, 0,
+                LS_ID_INFORM, seq,
+                &(ls_nbors[i].ip_addr), ls_data, sizeof_ls_data(ls_data)
+            );
+        }
+    }
+
+    //a change may have occured, update the cache
+    link_state_route_proto_update_cycle_cache(ethno);
+}
+
+/***********************************************************************
+ * handler for information reply
+ **********************************************************************/
+static void handle_icmp_ir(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t id, const uint16_t seq,
+    const void *buff, const size_t num_bytes
+){
+    switch (id)
+    {
+    //received a reply directly from the neighbor, add to neighbor list
+    case LS_ID_DISCOVER:
+        //printf("GOT LS_ID_DISCOVER REPLY - ID 0x%x - IP%u: %s\n", id, (int)ethno, ip_addr_to_str(u3_net_stack_get_ip_addr(ethno)));
+        if (ls_node_entries_update(ls_nbors, lengthof(ls_nbors), ethno, seq, src)) link_state_route_proto_flood(ethno);
+        break;
+    }
+}
+
+/***********************************************************************
+ * handler for information request
+ **********************************************************************/
+static void handle_icmp_irq(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t id, const uint16_t seq,
+    const void *buff, const size_t num_bytes
+){
+    switch (id)
+    {
+    //replies to discovery packets
+    case LS_ID_DISCOVER:
+        //printf("GOT LS_ID_DISCOVER REQ - IP%u: %s\n", (int)ethno, ip_addr_to_str(u3_net_stack_get_ip_addr(ethno)));
+        //printf("SEND LS_ID_DISCOVER REPLY - IP%u: %s\n", (int)ethno, ip_addr_to_str(u3_net_stack_get_ip_addr(ethno)));
+        u3_net_stack_send_icmp_pkt(ethno, ICMP_IR, 0, id, seq, src, buff, num_bytes);
+        break;
+
+    //handle and forward information
+    case LS_ID_INFORM:
+        //printf("GOT LS_ID_INFORM REQ - IP%u: %s\n", (int)ethno, ip_addr_to_str(u3_net_stack_get_ip_addr(ethno)));
+        send_link_state_data_to_all_neighbors(ethno, seq, (const ls_data_t *)buff);
+        break;
+    };
+}
+
+/***********************************************************************
+ * initiate a periodic update to the table
+ **********************************************************************/
+void link_state_route_proto_update(const uint8_t ethno)
+{
+    //send a discovery packet
+    //printf("SEND LS_ID_DISCOVER REQ - IP%u: %s\n", (int)ethno, ip_addr_to_str(u3_net_stack_get_ip_addr(ethno)));
+    u3_net_stack_send_icmp_pkt(
+        ethno, ICMP_IRQ, 0,
+        LS_ID_DISCOVER, current_seq++,
+        u3_net_stack_get_bcast(ethno), NULL, 0
+    );
+}
+
+void link_state_route_proto_flood(const uint8_t ethno)
+{
+    for (size_t e = 0; e < ethernet_ninterfaces(); e++)
+    {
+        //fill link state data buffer
+        uint8_t buff[LS_PAYLOAD_MTU] = {};
+        ls_data_t *ls_data = (ls_data_t *)buff;
+        ls_data->node.addr = u3_net_stack_get_ip_addr(e)->addr;
+        ls_data->num_nbors = 0;
+        ls_data->num_ports = 0;
+
+        //first the local port links
+        for (size_t ej = 0; ej < ethernet_ninterfaces(); ej++)
+        {
+            if (e == ej) continue; //dont include our own port
+            ls_data->nbors[ls_data->num_nbors++].addr = u3_net_stack_get_ip_addr(ej)->addr;
+            ls_data->num_ports++;
+        }
+
+        //now list the neighbors
+        for (size_t i = 0; i < lengthof(ls_nbors); i++)
+        {
+            if ((sizeof_ls_data(ls_data) + 4) >= LS_PAYLOAD_MTU) break;
+            if (ls_node_entry_valid(&ls_nbors[i]) && ls_nbors[i].ethno == e)
+            {
+                ls_data->nbors[ls_data->num_nbors++].addr = ls_nbors[i].ip_addr.addr;
+            }
+        }
+
+        //send this data to all neighbors
+        send_link_state_data_to_all_neighbors(ethno, current_seq++, ls_data);
+    }
+}
+
+/***********************************************************************
+ * cycle detection logic
+ **********************************************************************/
+static void follow_links(const size_t current, struct ip_addr *nodes, bool *visited, const size_t num_nodes)
+{
+    if (visited[current]) return; //end the recursion
+    visited[current] = true;
+
+    //follow all links where current node is the source
+    for (size_t i = 0; i < lengthof(ls_node_maps); i++)
+    {
+        if (ls_node_maps[i].node.addr != nodes[current].addr) continue;
+
+        //find the index of the neighbor in the node list to recurse
+        for (size_t j = 0; j < num_nodes; j++)
+        {
+            if (nodes[j].addr != ls_node_maps[i].nbor.addr) continue;
+            follow_links(j, nodes, visited, num_nodes);
+        }
+    }
+}
+
+bool link_state_route_proto_causes_cycle(const struct ip_addr *src, const struct ip_addr *dst)
+{
+    //printf("is there a cycle? %s -> %s: \n", ip_addr_to_str(src), ip_addr_to_str(dst));
+
+    //make a set of all nodes
+    size_t num_nodes = 0;
+    struct ip_addr nodes[LS_NUM_MAP_ENTRIES];
+    for (size_t i = 0; i < lengthof(ls_node_maps); i++)
+    {
+        if (ls_node_maps[i].node.addr == 0 || ls_node_maps[i].nbor.addr == 0) continue;
+        //printf("  Link %s -> %s\n", ip_addr_to_str(&ls_node_maps[i].node), ip_addr_to_str(&ls_node_maps[i].nbor));
+        const struct ip_addr *node = &ls_node_maps[i].node;
+
+        //check if we have an entry
+        for (size_t j = 0; j < num_nodes; j++)
+        {
+            if (nodes[j].addr == node->addr) goto skip_add;
+        }
+
+        //otherwise, we add the node
+        nodes[num_nodes++].addr = node->addr;
+        //printf("  Add to node set: %s\n", ip_addr_to_str(node));
+        skip_add: continue;
+    }
+
+    //and stateful tracking info for each node
+    bool visited[LS_NUM_MAP_ENTRIES];
+    for (size_t i = 0; i < num_nodes; i++) visited[i] = false;
+
+    //find our src node in the set and follow
+    for (size_t i = 0; i < num_nodes; i++)
+    {
+        if (nodes[i].addr == src->addr) follow_links(i, nodes, visited, num_nodes);
+    }
+
+    //did we visit the destination? if so, there is a cycle
+    for (size_t i = 0; i < num_nodes; i++)
+    {
+        if (nodes[i].addr == dst->addr && visited[i])
+        {
+            //printf("CAUSES CYCLE!\n");
+            return true;
+        }
+    }
+
+    //printf("no cycle found.\n");
+    return false;
+}
+
+static bool ls_causes_cycle[NETHS][NETHS];
+
+void link_state_route_proto_update_cycle_cache(const uint8_t eth_src)
+{
+    for (size_t eth_dst = 0; eth_dst < ethernet_ninterfaces(); eth_dst++)
+    {
+        if (eth_src == eth_dst) continue;
+        ls_causes_cycle[eth_src][eth_dst] = link_state_route_proto_causes_cycle(
+            u3_net_stack_get_ip_addr(eth_src),
+            u3_net_stack_get_ip_addr(eth_dst)
+        );
+    }
+}
+
+bool link_state_route_proto_causes_cycle_cached(const uint8_t eth_src, const uint8_t eth_dst)
+{
+    return ls_causes_cycle[eth_src][eth_dst];
+}
+
+/***********************************************************************
+ * init and registration code
+ **********************************************************************/
+void link_state_route_proto_init(void)
+{
+    u3_net_stack_register_icmp_handler(ICMP_IRQ, 0, &handle_icmp_irq);
+    u3_net_stack_register_icmp_handler(ICMP_IR, 0, &handle_icmp_ir);
+
+    //default to causing a cycle, let the algorithm set this correctly
+    for (size_t i = 0; i < NETHS; i++)
+    {
+        for (size_t j = 0; j < NETHS; j++)
+        {
+            ls_causes_cycle[i][j] = true;
+        }
+    }
+}
diff --git a/firmware/x300/lib/mdelay.c b/firmware/x300/lib/mdelay.c
new file mode 100644
index 000000000..6d2742206
--- /dev/null
+++ b/firmware/x300/lib/mdelay.c
@@ -0,0 +1,36 @@
+/* -*- c -*- */
+/*
+ * Copyright 2007 Free Software Foundation, Inc.
+ * Copyright 2009 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "mdelay.h"
+#include "wb_utils.h"
+#include "printf.h"
+#include <stdint.h>
+//IJB FIXME.
+#include "../x300/x300_defs.h"
+
+void mdelay(int ms){
+  for(int i = 0; i < ms; i++){
+    static const uint32_t num_ticks = CPU_CLOCK/1000;
+    const uint32_t ticks_begin = wb_peek32(SR_ADDR(RB0_BASE, RB_COUNTER));
+    //    printf("DEBUG: Counter is %d\n",ticks_begin);
+    while((wb_peek32(SR_ADDR(RB0_BASE, RB_COUNTER)) - ticks_begin) < num_ticks) {
+      /*NOP*/
+    }
+  }
+}
diff --git a/firmware/x300/lib/print_addrs.c b/firmware/x300/lib/print_addrs.c
new file mode 100644
index 000000000..6a710f75c
--- /dev/null
+++ b/firmware/x300/lib/print_addrs.c
@@ -0,0 +1,64 @@
+// Copyright 2013 Ettus Research LLC
+
+#include <print_addrs.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <printf.h>
+
+#define MAX_MAC_CHARS 24
+#define MAX_IP_CHARS 16
+
+static const char hex[16] = "0123456789ABCDEF";
+
+char *mac_addr_to_str_r(const void *addr, char *str)
+{
+    uint8_t *p = (uint8_t *)addr;
+    size_t j = 0;
+    for(size_t i = 0; i < 6; i++)
+    {
+        if (i) str[j++] = ':';
+        str[j++] = hex[(p[i] >> 4) & 0xf];
+        str[j++] = hex[p[i] & 0xf];
+    }
+    str[j++] = '\0';
+    return str;
+}
+
+char *ip_addr_to_str_r(const void *addr, char *str)
+{
+    uint8_t *p = (uint8_t *)addr;
+    sprintf(str, "%d.%d.%d.%d", p[0], p[1], p[2], p[3]);
+    return str;
+}
+
+char *mac_addr_to_str(const void *addr)
+{
+    static size_t index = 0;
+    index = (index + 1) % 4;
+    static char str[4][MAX_MAC_CHARS];
+    return mac_addr_to_str_r(addr, str[index]);
+}
+
+char *ip_addr_to_str(const void *addr)
+{
+    static size_t index = 0;
+    index = (index + 1) % 4;
+    static char str[4][MAX_IP_CHARS];
+    return ip_addr_to_str_r(addr, str[index]);
+}
+
+/*
+void print_mac_addr(const void *addr)
+{
+    char str[MAX_MAC_CHARS];
+    mac_addr_to_str_r(addr, str);
+    printf("%s", str);
+}
+
+void print_ip_addr(const void *addr)
+{
+    char str[MAX_IP_CHARS];
+    ip_addr_to_str_r(addr, str);
+    printf("%s", str);
+}
+*/
diff --git a/firmware/x300/lib/printf.c b/firmware/x300/lib/printf.c
new file mode 100644
index 000000000..6d6a3e712
--- /dev/null
+++ b/firmware/x300/lib/printf.c
@@ -0,0 +1,287 @@
+/*
+File: printf.c
+
+Copyright (C) 2004  Kustaa Nyholm
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+*/
+
+#include "printf.h"
+
+typedef void (*putcf) (void*,char);
+static putcf stdout_putf;
+static void* stdout_putp;
+
+#ifdef PRINTF_LONG_LONG_SUPPORT
+
+static void ulli2a(unsigned long long int num, unsigned int base, int uc,char * bf)
+    {
+    int n=0;
+    unsigned int d=1;
+    while (num/d >= base)
+        d*=base;         
+    while (d!=0) {
+        int dgt = num / d;
+        num%=d;
+        d/=base;
+        if (n || dgt>0|| d==0) {
+            *bf++ = dgt+(dgt<10 ? '0' : (uc ? 'A' : 'a')-10);
+            ++n;
+            }
+        }
+    *bf=0;
+    }
+
+static void lli2a (long long num, char * bf)
+    {
+    if (num<0) {
+        num=-num;
+        *bf++ = '-';
+        }
+    ulli2a(num,10,0,bf);
+    }
+
+#endif
+
+#ifdef PRINTF_LONG_SUPPORT
+
+static void uli2a(unsigned long int num, unsigned int base, int uc,char * bf)
+    {
+    int n=0;
+    unsigned int d=1;
+    while (num/d >= base)
+        d*=base;         
+    while (d!=0) {
+        int dgt = num / d;
+        num%=d;
+        d/=base;
+        if (n || dgt>0|| d==0) {
+            *bf++ = dgt+(dgt<10 ? '0' : (uc ? 'A' : 'a')-10);
+            ++n;
+            }
+        }
+    *bf=0;
+    }
+
+static void li2a (long num, char * bf)
+    {
+    if (num<0) {
+        num=-num;
+        *bf++ = '-';
+        }
+    uli2a(num,10,0,bf);
+    }
+
+#endif
+
+static void ui2a(unsigned int num, unsigned int base, int uc,char * bf)
+    {
+    int n=0;
+    unsigned int d=1;
+    while (num/d >= base)
+        d*=base;        
+    while (d!=0) {
+        int dgt = num / d;
+        num%= d;
+        d/=base;
+        if (n || dgt>0 || d==0) {
+            *bf++ = dgt+(dgt<10 ? '0' : (uc ? 'A' : 'a')-10);
+            ++n;
+            }
+        }
+    *bf=0;
+    }
+
+static void i2a (int num, char * bf)
+    {
+    if (num<0) {
+        num=-num;
+        *bf++ = '-';
+        }
+    ui2a(num,10,0,bf);
+    }
+
+static int a2d(char ch)
+    {
+    if (ch>='0' && ch<='9') 
+        return ch-'0';
+    else if (ch>='a' && ch<='f')
+        return ch-'a'+10;
+    else if (ch>='A' && ch<='F')
+        return ch-'A'+10;
+    else return -1;
+    }
+
+static char a2i(char ch, char** src,int base,int* nump)
+    {
+    char* p= *src;
+    int num=0;
+    int digit;
+    while ((digit=a2d(ch))>=0) {
+        if (digit>base) break;
+        num=num*base+digit;
+        ch=*p++;
+        }
+    *src=p;
+    *nump=num;
+    return ch;
+    }
+
+static void putchw(void* putp,putcf putf,int n, char z, char* bf)
+    {
+    char fc=z? '0' : ' ';
+    char ch;
+    char* p=bf;
+    while (*p++ && n > 0)
+        n--;
+    while (n-- > 0) 
+        putf(putp,fc);
+    while ((ch= *bf++))
+        putf(putp,ch);
+    }
+
+void tfp_format(void* putp,putcf putf,char *fmt, va_list va)
+    {
+    char bf[12];
+    
+    char ch;
+
+
+    while ((ch=*(fmt++))) {
+        if (ch!='%') 
+            putf(putp,ch);
+        else {
+            char lz=0;
+#ifdef  PRINTF_LONG_SUPPORT
+            char lng=0;
+#endif
+#ifdef  PRINTF_LONG_LONG_SUPPORT
+            char lnglng=0;
+#endif
+            int w=0;
+            ch=*(fmt++);
+            if (ch=='0') {
+                ch=*(fmt++);
+                lz=1;
+                }
+            if (ch>='0' && ch<='9') {
+                ch=a2i(ch,&fmt,10,&w);
+                }
+#ifdef  PRINTF_LONG_SUPPORT
+            if (ch=='l') {
+                ch=*(fmt++);
+                lng=1;
+            }
+#endif
+#ifdef  PRINTF_LONG_LONG_SUPPORT
+	    if ((ch=='l')&&(lng==1)) {
+                ch=*(fmt++);
+                lnglng=1;
+            }
+#endif
+            switch (ch) {
+                case 0: 
+                    goto abort;
+                case 'u' : {
+#ifdef  PRINTF_LONG_LONG_SUPPORT
+                    if (lnglng)
+                        ulli2a(va_arg(va, unsigned long long int),10,0,bf);
+                    else
+#endif
+#ifdef  PRINTF_LONG_SUPPORT
+                    if (lng)
+                        uli2a(va_arg(va, unsigned long int),10,0,bf);
+                    else
+#endif
+                    ui2a(va_arg(va, unsigned int),10,0,bf);
+                    putchw(putp,putf,w,lz,bf);
+                    break;
+                    }
+                case 'd' :  {
+#ifdef  PRINTF_LONG_LONG_SUPPORT
+                    if (lnglng)
+                        lli2a(va_arg(va, long long int),bf);
+                    else
+#endif
+#ifdef  PRINTF_LONG_SUPPORT
+                    if (lng)
+                        li2a(va_arg(va, long int),bf);
+                    else
+#endif
+                    i2a(va_arg(va, int),bf);
+                    putchw(putp,putf,w,lz,bf);
+                    break;
+                    }
+                case 'x': case 'X' : 
+#ifdef  PRINTF_LONG_LONG_SUPPORT
+                    if (lnglng)
+                        ulli2a(va_arg(va, unsigned long long int),16,(ch=='X'),bf);
+                    else
+#endif
+#ifdef  PRINTF_LONG_SUPPORT
+                    if (lng)
+                        uli2a(va_arg(va, unsigned long int),16,(ch=='X'),bf);
+                    else
+#endif
+                    ui2a(va_arg(va, unsigned int),16,(ch=='X'),bf);
+                    putchw(putp,putf,w,lz,bf);
+                    break;
+                case 'c' : 
+                    putf(putp,(char)(va_arg(va, int)));
+                    break;
+                case 's' : 
+                    putchw(putp,putf,w,0,va_arg(va, char*));
+                    break;
+                case '%' :
+                    putf(putp,ch);
+                default:
+                    break;
+                }
+            }
+        }
+    abort:;
+    }
+
+
+void init_printf(void* putp,void (*putf) (void*,char))
+    {
+    stdout_putf=putf;
+    stdout_putp=putp;
+    }
+
+void tfp_printf(char *fmt, ...)
+    {
+    va_list va;
+    va_start(va,fmt);
+    tfp_format(stdout_putp,stdout_putf,fmt,va);
+    va_end(va);
+    }
+
+static void putcp(void* p,char c)
+    {
+    *(*((char**)p))++ = c;
+    }
+
+
+
+void tfp_sprintf(char* s,char *fmt, ...)
+    {
+    va_list va;
+    va_start(va,fmt);
+    tfp_format(&s,putcp,fmt,va);
+    putcp(&s,0);
+    va_end(va);
+    }
diff --git a/firmware/x300/lib/u3_net_stack.c b/firmware/x300/lib/u3_net_stack.c
new file mode 100644
index 000000000..6b8ef096c
--- /dev/null
+++ b/firmware/x300/lib/u3_net_stack.c
@@ -0,0 +1,589 @@
+
+// Copyright 2012-2013 Ettus Research LLC
+
+#include <u3_net_stack.h>
+#include <string.h> //memcmp
+#include <printf.h>
+
+#define MAX_NETHS 4
+
+typedef struct
+{
+    padded_eth_hdr_t eth;
+    struct arp_eth_ipv4 arp;
+} padded_arp_t;
+
+typedef struct
+{
+    padded_eth_hdr_t eth;
+    struct ip_hdr ip;
+    struct icmp_echo_hdr icmp;
+} padded_icmp_t;
+
+typedef struct
+{
+    padded_eth_hdr_t eth;
+    struct ip_hdr ip;
+    struct udp_hdr udp;
+} padded_udp_t;
+
+/***********************************************************************
+ * declares for internal handlers
+ **********************************************************************/
+static void handle_icmp_echo_packet(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t id, const uint16_t seq,
+    const void *buff, const size_t num_bytes
+){
+    u3_net_stack_send_icmp_pkt(ethno, ICMP_ER, 0, id, seq, src, buff, num_bytes);
+}
+
+static void handle_icmp_dur_packet(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t id, const uint16_t seq,
+    const void *buff, const size_t num_bytes
+);
+
+/***********************************************************************
+ * 16-bit one's complement sum
+ **********************************************************************/
+static uint32_t chksum_buffer(
+    uint16_t *buf, size_t nshorts,
+    uint32_t initial_chksum
+){
+    uint32_t chksum = initial_chksum;
+    for (size_t i = 0; i < nshorts; i++) chksum += buf[i];
+
+    while (chksum >> 16) chksum = (chksum & 0xffff) + (chksum >> 16);
+
+    return chksum;
+}
+
+/***********************************************************************
+ * ARP Cache implementation
+ **********************************************************************/
+#define ARP_CACHE_NENTRIES 32
+
+static size_t arp_cache_wr_index;
+
+static struct ip_addr arp_cache_ips[ARP_CACHE_NENTRIES];
+static eth_mac_addr_t arp_cache_macs[ARP_CACHE_NENTRIES];
+static uint8_t arp_cache_eths[ARP_CACHE_NENTRIES];
+
+void u3_net_stack_arp_cache_update(const struct ip_addr *ip_addr, const eth_mac_addr_t *mac_addr, const uint8_t ethno)
+{
+    for (size_t i = 0; i < ARP_CACHE_NENTRIES; i++)
+    {
+        if (memcmp(ip_addr, arp_cache_ips+i, sizeof(struct ip_addr)) == 0)
+        {
+            memcpy(arp_cache_macs+i, mac_addr, sizeof(eth_mac_addr_t));
+            arp_cache_eths[i] = ethno;
+            return;
+        }
+    }
+    if (arp_cache_wr_index >= ARP_CACHE_NENTRIES) arp_cache_wr_index = 0;
+    memcpy(arp_cache_ips+arp_cache_wr_index, ip_addr, sizeof(struct ip_addr));
+    memcpy(arp_cache_macs+arp_cache_wr_index, mac_addr, sizeof(eth_mac_addr_t));
+    arp_cache_eths[arp_cache_wr_index] = ethno;
+    arp_cache_wr_index++;
+}
+
+const eth_mac_addr_t *u3_net_stack_arp_cache_lookup(const struct ip_addr *ip_addr)
+{
+    //do a local look up on our own ports
+    for (size_t e = 0; e < MAX_NETHS; e++)
+    {
+        if (memcmp(ip_addr, u3_net_stack_get_ip_addr(e), sizeof(struct ip_addr)) == 0)
+        {
+            return u3_net_stack_get_mac_addr(e);
+        }
+    }
+    //now check the arp cache
+    for (size_t i = 0; i < ARP_CACHE_NENTRIES; i++)
+    {
+        if (memcmp(ip_addr, arp_cache_ips+i, sizeof(struct ip_addr)) == 0)
+        {
+            return &arp_cache_macs[i];
+        }
+    }
+    return NULL;
+}
+
+bool resolve_ip(const struct ip_addr *ip_addr, eth_mac_addr_t *mac_addr)
+{
+    for (size_t e = 0; e < MAX_NETHS; e++)
+    {
+        if (memcmp(u3_net_stack_get_bcast(e), ip_addr, sizeof(struct ip_addr)) == 0)
+        {
+            memset(mac_addr, 0xff, sizeof(eth_mac_addr_t));
+            return true;
+        }
+    }
+    const eth_mac_addr_t *r = u3_net_stack_arp_cache_lookup(ip_addr);
+    if (r != NULL)
+    {
+        memcpy(mac_addr, r, sizeof(eth_mac_addr_t));
+        return true;
+    }
+    return false;
+}
+
+/***********************************************************************
+ * Net stack config
+ **********************************************************************/
+static wb_pkt_iface64_config_t *pkt_iface_config = NULL;
+
+void u3_net_stack_init(wb_pkt_iface64_config_t *config)
+{
+    pkt_iface_config = config;
+    u3_net_stack_register_icmp_handler(ICMP_ECHO, 0, &handle_icmp_echo_packet);
+    u3_net_stack_register_icmp_handler(ICMP_DUR, ICMP_DUR_PORT, &handle_icmp_dur_packet);
+}
+
+static struct ip_addr net_conf_ips[MAX_NETHS];
+static eth_mac_addr_t net_conf_macs[MAX_NETHS];
+static struct ip_addr net_conf_subnets[MAX_NETHS];
+static struct ip_addr net_conf_bcasts[MAX_NETHS];
+static uint32_t net_stat_counts[MAX_NETHS];
+
+void u3_net_stack_init_eth(
+    const uint8_t ethno,
+    const eth_mac_addr_t *mac,
+    const struct ip_addr *ip,
+    const struct ip_addr *subnet
+)
+{
+    memcpy(&net_conf_macs[ethno], mac, sizeof(eth_mac_addr_t));
+    memcpy(&net_conf_ips[ethno], ip, sizeof(struct ip_addr));
+    memcpy(&net_conf_subnets[ethno], subnet, sizeof(struct ip_addr));
+    net_stat_counts[ethno] = 0;
+}
+
+const struct ip_addr *u3_net_stack_get_ip_addr(const uint8_t ethno)
+{
+    return &net_conf_ips[ethno];
+}
+
+const struct ip_addr *u3_net_stack_get_subnet(const uint8_t ethno)
+{
+    return &net_conf_subnets[ethno];
+}
+
+const struct ip_addr *u3_net_stack_get_bcast(const uint8_t ethno)
+{
+    const uint32_t ip = u3_net_stack_get_ip_addr(ethno)->addr;
+    const uint32_t subnet = u3_net_stack_get_subnet(ethno)->addr;
+    net_conf_bcasts[ethno].addr = ip | (~subnet);
+    return &net_conf_bcasts[ethno];
+}
+
+const eth_mac_addr_t *u3_net_stack_get_mac_addr(const uint8_t ethno)
+{
+    return &net_conf_macs[ethno];
+}
+
+/***********************************************************************
+ * Ethernet activity stats
+ **********************************************************************/
+uint32_t u3_net_stack_get_stat_counts(const uint8_t ethno)
+{
+    return net_stat_counts[ethno];
+}
+
+static void incr_stat_counts(const void *p)
+{
+    const padded_eth_hdr_t *eth = (const padded_eth_hdr_t *)p;
+    if (eth->ethno < MAX_NETHS) net_stat_counts[eth->ethno]++;
+}
+
+/***********************************************************************
+ * Ethernet handlers - send packet w/ payload
+ **********************************************************************/
+static void send_eth_pkt(
+    const void *p0, const size_t l0,
+    const void *p1, const size_t l1,
+    const void *p2, const size_t l2
+)
+{
+    incr_stat_counts(p0);
+    void *ptr = wb_pkt_iface64_tx_claim(pkt_iface_config);
+    size_t buff_i = 0;
+
+    uint32_t *buff32 = (uint32_t *)ptr;
+    for (size_t i = 0; i < (l0+3)/4; i++)
+    {
+        buff32[buff_i++] = ((const uint32_t *)p0)[i];
+    }
+    for (size_t i = 0; i < (l1+3)/4; i++)
+    {
+        buff32[buff_i++] = ((const uint32_t *)p1)[i];
+    }
+    for (size_t i = 0; i < (l2+3)/4; i++)
+    {
+        buff32[buff_i++] = ((const uint32_t *)p2)[i];
+    }
+
+    // Fixes issue where we don't write an even number of 32bit words leaving last data stranded in H/W.
+    if ((buff_i%2) == 1) buff32[buff_i++] = 0;
+
+    wb_pkt_iface64_tx_submit(pkt_iface_config, l0 + l1 + l2);
+}
+
+/***********************************************************************
+ * ARP handlers
+ **********************************************************************/
+static void send_arp_reply(
+    const uint8_t ethno,
+    const struct arp_eth_ipv4 *req,
+    const eth_mac_addr_t *our_mac
+){
+    padded_arp_t reply;
+    reply.eth.ethno = ethno;
+    memcpy(&reply.eth.dst, (eth_mac_addr_t *)req->ar_sha, sizeof(eth_mac_addr_t));
+    memcpy(&reply.eth.src, u3_net_stack_get_mac_addr(ethno), sizeof(eth_mac_addr_t));
+    reply.eth.ethertype = ETHERTYPE_ARP;
+
+    reply.arp.ar_hrd = req->ar_hrd;
+    reply.arp.ar_pro = req->ar_pro;
+    reply.arp.ar_hln = req->ar_hln;
+    reply.arp.ar_pln = req->ar_pln;
+    reply.arp.ar_op = ARPOP_REPLY;
+    memcpy(reply.arp.ar_sha, our_mac,     sizeof(eth_mac_addr_t));
+    memcpy(reply.arp.ar_sip, req->ar_tip, sizeof(struct ip_addr));
+    memcpy(reply.arp.ar_tha, req->ar_sha, sizeof(eth_mac_addr_t));
+    memcpy(reply.arp.ar_tip, req->ar_sip, sizeof(struct ip_addr));
+
+    send_eth_pkt(&reply, sizeof(reply), NULL, 0, NULL, 0);
+}
+
+void u3_net_stack_send_arp_request(const uint8_t ethno, const struct ip_addr *addr)
+{
+    padded_arp_t req;
+    req.eth.ethno = ethno;
+    memset(&req.eth.dst, 0xff, sizeof(eth_mac_addr_t)); //bcast
+    memcpy(&req.eth.src, u3_net_stack_get_mac_addr(ethno), sizeof(eth_mac_addr_t));
+    req.eth.ethertype = ETHERTYPE_ARP;
+
+    req.arp.ar_hrd = ARPHRD_ETHER;
+    req.arp.ar_pro = ETHERTYPE_IPV4;
+    req.arp.ar_hln = sizeof(eth_mac_addr_t);
+    req.arp.ar_pln = sizeof(struct ip_addr);
+    req.arp.ar_op = ARPOP_REQUEST;
+    memcpy(req.arp.ar_sha, u3_net_stack_get_mac_addr(ethno), sizeof(eth_mac_addr_t));
+    memcpy(req.arp.ar_sip, u3_net_stack_get_ip_addr(ethno), sizeof(struct ip_addr));
+    memset(req.arp.ar_tha, 0x00, sizeof(eth_mac_addr_t));
+    memcpy(req.arp.ar_tip, addr, sizeof(struct ip_addr));
+
+    send_eth_pkt(&req, sizeof(req), NULL, 0, NULL, 0);
+}
+
+static void handle_arp_packet(const uint8_t ethno, const struct arp_eth_ipv4 *p)
+{
+    //printf("handle_arp_packet\n");
+    if (p->ar_hrd != ARPHRD_ETHER
+      || p->ar_pro != ETHERTYPE_IPV4
+      || p->ar_hln != sizeof(eth_mac_addr_t)
+      || p->ar_pln != sizeof(struct ip_addr))
+    return;
+
+    //got an arp reply -- injest it into the arp cache
+    if (p->ar_op == ARPOP_REPLY)
+    {
+        //printf("ARPOP_REPLY\n");
+        struct ip_addr ip_addr;
+        memcpy(&ip_addr, p->ar_sip, sizeof(ip_addr));
+        eth_mac_addr_t mac_addr;
+        memcpy(&mac_addr, p->ar_sha, sizeof(mac_addr));
+        u3_net_stack_arp_cache_update(&ip_addr, &mac_addr, ethno);
+    }
+
+    //got an arp request -- reply if its for our address
+    if (p->ar_op == ARPOP_REQUEST)
+    {
+        //printf("ARPOP_REQUEST\n");
+        if (memcmp(p->ar_tip, u3_net_stack_get_ip_addr(ethno), sizeof(struct ip_addr)) == 0)
+        {
+            send_arp_reply(ethno, p, u3_net_stack_get_mac_addr(ethno));
+        }
+    }
+}
+
+/***********************************************************************
+ * UDP handlers
+ **********************************************************************/
+#define UDP_NHANDLERS 16
+
+static uint16_t udp_handler_ports[UDP_NHANDLERS];
+static u3_net_stack_udp_handler_t udp_handlers[UDP_NHANDLERS];
+static size_t udp_handlers_index = 0;
+
+void u3_net_stack_register_udp_handler(
+    const uint16_t port,
+    const u3_net_stack_udp_handler_t handler
+)
+{
+    if (udp_handlers_index < UDP_NHANDLERS)
+    {
+        udp_handler_ports[udp_handlers_index] = port;
+        udp_handlers[udp_handlers_index] = handler;
+        udp_handlers_index++;
+    }
+}
+
+void u3_net_stack_send_udp_pkt(
+    const uint8_t ethno,
+    const struct ip_addr *dst,
+    const uint16_t src_port,
+    const uint16_t dst_port,
+    const void *buff,
+    const size_t num_bytes
+)
+{
+    eth_mac_addr_t dst_mac_addr;
+    if (!resolve_ip(dst, &dst_mac_addr))
+    {
+        printf("u3_net_stack_send_udp_pkt arp_cache_lookup fail\n");
+        return;
+    }
+
+    padded_udp_t pkt;
+
+    pkt.eth.ethno = ethno;
+    memcpy(&pkt.eth.dst, &dst_mac_addr,                    sizeof(eth_mac_addr_t));
+    memcpy(&pkt.eth.src, u3_net_stack_get_mac_addr(ethno), sizeof(eth_mac_addr_t));
+    pkt.eth.ethertype = ETHERTYPE_IPV4;
+
+    IPH_VHLTOS_SET(&pkt.ip, 4, 5, 0);
+    IPH_LEN_SET(&pkt.ip, IP_HLEN + UDP_HLEN + num_bytes);
+    IPH_ID_SET(&pkt.ip, 0);
+    IPH_OFFSET_SET(&pkt.ip, IP_DF);	/* don't fragment */
+    IPH_TTL_SET(&pkt.ip, 32);
+    IPH_PROTO_SET(&pkt.ip, IP_PROTO_UDP);
+    IPH_CHKSUM_SET(&pkt.ip, 0);
+    memcpy(&pkt.ip.src, u3_net_stack_get_ip_addr(ethno), sizeof(struct ip_addr));
+    memcpy(&pkt.ip.dest, dst, sizeof(struct ip_addr));
+
+    IPH_CHKSUM_SET(&pkt.ip, ~chksum_buffer(
+        (unsigned short *) &pkt.ip, sizeof(pkt.ip)/sizeof(short), 0
+    ));
+
+    pkt.udp.src = src_port;
+    pkt.udp.dest = dst_port;
+    pkt.udp.len = UDP_HLEN + num_bytes;
+    pkt.udp.chksum = 0;
+
+    send_eth_pkt(&pkt, sizeof(pkt), buff, num_bytes, NULL, 0);
+}
+
+static void handle_udp_packet(
+    const uint8_t ethno,
+    const struct ip_addr *src,
+    const struct ip_addr *dst,
+    const struct udp_hdr *udp,
+    const size_t num_bytes
+){
+    for (size_t i = 0; i < udp_handlers_index; i++)
+    {
+        if (udp_handler_ports[i] == udp->dest)
+        {
+            udp_handlers[i](
+                ethno, src, u3_net_stack_get_ip_addr(ethno), udp->src, udp->dest,
+                ((const uint8_t *)udp) + sizeof(struct udp_hdr),
+                num_bytes - UDP_HLEN
+            );
+            return;
+        }
+    }
+    printf("Unhandled UDP packet src=%u, dest=%u\n", udp->src, udp->dest);
+    //TODO send destination unreachable
+}
+
+/***********************************************************************
+ * ICMP handlers
+ **********************************************************************/
+#define ICMP_NHANDLERS 8
+
+static uint8_t icmp_handler_types[ICMP_NHANDLERS];
+static uint8_t icmp_handler_codes[ICMP_NHANDLERS];
+static u3_net_stack_icmp_handler_t icmp_handlers[ICMP_NHANDLERS];
+static size_t icmp_handlers_index = 0;
+
+void u3_net_stack_register_icmp_handler(
+    const uint8_t type,
+    const uint8_t code,
+    const u3_net_stack_icmp_handler_t handler
+)
+{
+    if (icmp_handlers_index < ICMP_NHANDLERS)
+    {
+        icmp_handler_types[icmp_handlers_index] = type;
+        icmp_handler_codes[icmp_handlers_index] = code;
+        icmp_handlers[icmp_handlers_index] = handler;
+        icmp_handlers_index++;
+    }
+}
+
+static void handle_icmp_packet(
+    const uint8_t ethno,
+    const struct ip_addr *src,
+    const struct ip_addr *dst,
+    const struct icmp_echo_hdr *icmp,
+    const size_t num_bytes
+){
+
+    for (size_t i = 0; i < icmp_handlers_index; i++)
+    {
+        if (icmp_handler_types[i] == icmp->type && icmp_handler_codes[i] == icmp->code)
+        {
+            icmp_handlers[i](
+                ethno, src, u3_net_stack_get_ip_addr(ethno), icmp->id, icmp->seqno,
+                ((const uint8_t *)icmp) + sizeof(struct icmp_echo_hdr),
+                num_bytes - sizeof(struct icmp_echo_hdr)
+            );
+            return;
+        }
+    }
+    printf("Unhandled ICMP packet type=%u\n", icmp->type);
+}
+
+static void handle_icmp_dur_packet(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t id, const uint16_t seq,
+    const void *buff, const size_t num_bytes
+){
+    struct ip_hdr *ip = (struct ip_hdr *)buff;
+    struct udp_hdr *udp = (struct udp_hdr *)(((char *)ip) + IP_HLEN);
+    if (IPH_PROTO(ip) != IP_PROTO_UDP) return;
+    for (size_t i = 0; i < udp_handlers_index; i++)
+    {
+        if (udp_handler_ports[i] == udp->src)
+        {
+            udp_handlers[i](ethno,
+                src, u3_net_stack_get_ip_addr(ethno),
+                udp->src, udp->dest, NULL, 0
+            );
+            return;
+        }
+    }
+}
+
+void u3_net_stack_send_icmp_pkt(
+    const uint8_t ethno,
+    const uint8_t type,
+    const uint8_t code,
+    const uint16_t id,
+    const uint16_t seq,
+    const struct ip_addr *dst,
+    const void *buff,
+    const size_t num_bytes
+)
+{
+    eth_mac_addr_t dst_mac_addr;
+    if (!resolve_ip(dst, &dst_mac_addr))
+    {
+        printf("u3_net_stack_send_echo_request arp_cache_lookup fail\n");
+        return;
+    }
+
+    padded_icmp_t pkt;
+
+    pkt.eth.ethno = ethno;
+    memcpy(&pkt.eth.dst, &dst_mac_addr,                    sizeof(eth_mac_addr_t));
+    memcpy(&pkt.eth.src, u3_net_stack_get_mac_addr(ethno), sizeof(eth_mac_addr_t));
+    pkt.eth.ethertype = ETHERTYPE_IPV4;
+
+    IPH_VHLTOS_SET(&pkt.ip, 4, 5, 0);
+    IPH_LEN_SET(&pkt.ip, IP_HLEN + sizeof(pkt.icmp) + num_bytes);
+    IPH_ID_SET(&pkt.ip, 0);
+    IPH_OFFSET_SET(&pkt.ip, IP_DF);	/* don't fragment */
+    IPH_TTL_SET(&pkt.ip, 32);
+    IPH_PROTO_SET(&pkt.ip, IP_PROTO_ICMP);
+    IPH_CHKSUM_SET(&pkt.ip, 0);
+    memcpy(&pkt.ip.src, u3_net_stack_get_ip_addr(ethno), sizeof(struct ip_addr));
+    memcpy(&pkt.ip.dest, dst, sizeof(struct ip_addr));
+
+    IPH_CHKSUM_SET(&pkt.ip, ~chksum_buffer(
+        (unsigned short *) &pkt.ip, sizeof(pkt.ip)/sizeof(short), 0
+    ));
+
+    pkt.icmp.type = type;
+    pkt.icmp.code = code;
+    pkt.icmp.chksum = 0;
+    pkt.icmp.id = id;
+    pkt.icmp.seqno = seq;
+    pkt.icmp.chksum = ~chksum_buffer( //data checksum
+        (unsigned short *)buff,
+        num_bytes/sizeof(short),
+        chksum_buffer(                  //header checksum
+            (unsigned short *)&pkt.icmp,
+            sizeof(pkt.icmp)/sizeof(short),
+        0)
+    );
+
+    send_eth_pkt(&pkt, sizeof(pkt), buff, num_bytes, NULL, 0);
+}
+
+/***********************************************************************
+ * Ethernet handlers
+ **********************************************************************/
+static void handle_eth_packet(const void *buff, const size_t num_bytes)
+{
+    const padded_eth_hdr_t *eth_hdr = (padded_eth_hdr_t *)buff;
+    const uint8_t *eth_body = ((const uint8_t *)buff) + sizeof(padded_eth_hdr_t);
+    //printf("handle_eth_packet got ethertype 0x%x\n", (unsigned)eth_hdr->ethertype);
+
+    if (eth_hdr->ethertype == ETHERTYPE_ARP)
+    {
+        //printf("eth_hdr->ethertype == ETHERTYPE_ARP\n");
+        const struct arp_eth_ipv4 *arp = (const struct arp_eth_ipv4 *)eth_body;
+        handle_arp_packet(eth_hdr->ethno, arp);
+    }
+    else if (eth_hdr->ethertype == ETHERTYPE_IPV4)
+    {
+        //printf("eth_hdr->ethertype == ETHERTYPE_IPV4\n");
+        const struct ip_hdr *ip = (const struct ip_hdr *)eth_body;
+        const uint8_t *ip_body = eth_body + IP_HLEN;
+
+        if (IPH_V(ip) != 4 || IPH_HL(ip) != 5) return;// ignore pkts w/ bad version or options
+        if (IPH_OFFSET(ip) & (IP_MF | IP_OFFMASK)) return;// ignore fragmented packets
+
+        //TODO -- only handle when the mac is bcast or IP is for us
+
+        u3_net_stack_arp_cache_update(&ip->src, &eth_hdr->src, eth_hdr->ethno);
+
+        if (IPH_PROTO(ip) == IP_PROTO_UDP)
+        {
+            handle_udp_packet(
+                eth_hdr->ethno, &ip->src, &ip->dest,
+                (const struct udp_hdr *)ip_body,
+                IPH_LEN(ip) - IP_HLEN
+            );
+        }
+
+        if (IPH_PROTO(ip) == IP_PROTO_ICMP)
+        {
+            handle_icmp_packet(
+                eth_hdr->ethno, &ip->src, &ip->dest,
+                (const struct icmp_echo_hdr *)ip_body,
+                IPH_LEN(ip) - IP_HLEN
+            );
+        }
+    }
+    else return;	// Not ARP or IPV4, ignore
+}
+
+void u3_net_stack_handle_one(void)
+{
+    size_t num_bytes = 0;
+    const void *ptr = wb_pkt_iface64_rx_try_claim(pkt_iface_config, &num_bytes);
+    if (ptr != NULL)
+    {
+        //printf("u3_net_stack_handle_one got %u bytes\n", (unsigned)num_bytes);
+        incr_stat_counts(ptr);
+        handle_eth_packet(ptr, num_bytes);
+        wb_pkt_iface64_rx_release(pkt_iface_config);
+    }
+}
diff --git a/firmware/x300/lib/udp_uart.c b/firmware/x300/lib/udp_uart.c
new file mode 100644
index 000000000..d078aa2c3
--- /dev/null
+++ b/firmware/x300/lib/udp_uart.c
@@ -0,0 +1,149 @@
+/*
+ * Copyright 2011-2013 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <wb_uart.h>
+#include <udp_uart.h>
+#include <u3_net_stack.h>
+
+/***********************************************************************
+ * Constants
+ **********************************************************************/
+#define MAX_NUM_UARTS 4
+
+static const size_t num_idle_cyc_b4_flush = 22;
+
+/***********************************************************************
+ * Globals
+ **********************************************************************/
+typedef struct
+{
+    uint32_t uart_base;
+    struct ip_addr host_addr;
+    int host_ethno;
+    uint16_t host_port;
+    uint16_t local_port;
+    __attribute__ ((aligned (16))) uint8_t buf[256];
+    size_t len; //length of buffer
+    size_t cyc; //idle cycle count
+} udp_uart_state_t;
+
+static udp_uart_state_t _states[MAX_NUM_UARTS];
+
+static int udp_uart_lookup(const uint16_t port)
+{
+    for (size_t i = 0; i < MAX_NUM_UARTS; i++)
+    {
+        if (_states[i].local_port == port) return i;
+    }
+    return -1;
+}
+
+/***********************************************************************
+ * UDP handler for UARTs
+ **********************************************************************/
+static void handle_uart_data_packet(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t src_port, const uint16_t dst_port,
+    const void *buff, const size_t num_bytes
+){
+    //handle ICMP destination unreachable
+    if (buff == NULL)
+    {
+        const size_t which = udp_uart_lookup(src_port);
+        if (which == -1) return;
+        _states[which].host_port = 0;
+    }
+
+    //handle a regular blocking UART write
+    else
+    {
+        const size_t which = udp_uart_lookup(dst_port);
+        if (which == -1) return;
+        _states[which].host_ethno = ethno;
+        _states[which].host_addr = *src;
+        _states[which].host_port = src_port;
+        for (size_t i = 0; i < num_bytes; i++)
+        {
+            const char ch = ((const char *)buff)[i];
+            if (ch == '\n') wb_uart_putc(_states[which].uart_base, (int)'\r');
+            wb_uart_putc(_states[which].uart_base, (int)ch);
+            udp_uart_poll();
+        }
+    }
+}
+
+/***********************************************************************
+ * Public init function
+ **********************************************************************/
+void udp_uart_init(const uint32_t uart_base, const uint16_t udp_port)
+{
+    for (size_t i = 0; i < MAX_NUM_UARTS; i++)
+    {
+        if (_states[i].uart_base != 0) continue;
+        _states[i].uart_base = uart_base;
+        _states[i].local_port = udp_port;
+        _states[i].host_port = 0; //reset to null port
+        _states[i].len = 0;
+        _states[i].cyc = 0;
+        u3_net_stack_register_udp_handler(udp_port, &handle_uart_data_packet);
+        return;
+    }
+}
+
+/***********************************************************************
+ * Public poll function
+ **********************************************************************/
+void udp_uart_poll(void)
+{
+    for (size_t i = 0; i < MAX_NUM_UARTS; i++)
+    {
+        if (_states[i].uart_base == 0) continue;
+
+        bool newline = false;
+        udp_uart_state_t *state = &_states[i];
+
+        //read all characters we can without blocking
+        for (size_t j = state->len; j < sizeof(state->buf); j++)
+        {
+            int ret = wb_uart_getc(state->uart_base);
+            if (ret == -1) break;
+            char ch = (char) ret;
+            if (ch == '\n' || ch == '\r') newline = true;
+            state->buf[j] = ch;
+            state->len++;
+            state->cyc = 0; //reset idle cycles
+        }
+
+        //nothing in buffer, continue to next uart
+        if (state->len == 0) continue;
+
+        //send out a message if newline or forced flush
+        if (newline || state->cyc++ > num_idle_cyc_b4_flush)
+        {
+            if (state->host_port != 0) u3_net_stack_send_udp_pkt(
+                state->host_ethno,
+                &state->host_addr,
+                state->local_port,
+                state->host_port,
+                state->buf, state->len
+            );
+            state->len = 0;
+            state->cyc = 0;
+        }
+    }
+}
diff --git a/firmware/x300/lib/wb_i2c.c b/firmware/x300/lib/wb_i2c.c
new file mode 100644
index 000000000..611908e18
--- /dev/null
+++ b/firmware/x300/lib/wb_i2c.c
@@ -0,0 +1,137 @@
+
+// Copyright 2012 Ettus Research LLC
+/*
+ * Copyright 2007 Free Software Foundation, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// NOTE: this driver left shifts a "7bit" I2C address by one bit and puts a R/W bit as bit 0.
+// Some devices may specify there I2C address assuming this R/W bit is already in place.
+
+#include <wb_i2c.h>
+
+typedef struct {
+  volatile uint32_t  prescaler_lo;	// r/w
+  volatile uint32_t  prescaler_hi;	// r/w
+  volatile uint32_t  ctrl;		// r/w
+  volatile uint32_t  data;		// wr = transmit reg; rd = receive reg
+  volatile uint32_t  cmd_status;	// wr = command reg;  rd = status reg
+} i2c_regs_t;
+
+#define i2c_regs ((i2c_regs_t *) base)
+
+#define	I2C_CTRL_EN	(1 << 7)	// core enable
+#define	I2C_CTRL_IE	(1 << 6)	// interrupt enable
+
+//
+// STA, STO, RD, WR, and IACK bits are cleared automatically
+//
+#define	I2C_CMD_START	(1 << 7)	// generate (repeated) start condition
+#define I2C_CMD_STOP	(1 << 6)	// generate stop condition
+#define	I2C_CMD_RD	(1 << 5)	// read from slave
+#define I2C_CMD_WR	(1 << 4)	// write to slave
+#define	I2C_CMD_NACK	(1 << 3)	// when a rcvr, send ACK (ACK=0) or NACK (ACK=1)
+#define I2C_CMD_RSVD_2	(1 << 2)	// reserved
+#define	I2C_CMD_RSVD_1	(1 << 1)	// reserved
+#define I2C_CMD_IACK	(1 << 0)	// set to clear pending interrupt
+
+#define I2C_ST_RXACK	(1 << 7)	// Received acknowledgement from slave (1 = NAK, 0 = ACK)
+#define	I2C_ST_BUSY	(1 << 6)	// 1 after START signal detected; 0 after STOP signal detected
+#define	I2C_ST_AL	(1 << 5)	// Arbitration lost.  1 when core lost arbitration
+#define	I2C_ST_RSVD_4	(1 << 4)	// reserved
+#define	I2C_ST_RSVD_3	(1 << 3)	// reserved
+#define	I2C_ST_RSVD_2	(1 << 2)	// reserved
+#define I2C_ST_TIP	(1 << 1)	// Transfer-in-progress
+#define	I2C_ST_IP	(1 << 0)	// Interrupt pending
+
+void wb_i2c_init(const uint32_t base, const size_t clk_rate)
+{
+    // prescaler divisor values for 100 kHz I2C [uses 5 * SCLK internally]
+    const uint16_t prescaler = (clk_rate/(5 * 400000)) - 1;
+  i2c_regs->prescaler_lo = prescaler & 0xff;
+  i2c_regs->prescaler_hi = (prescaler >> 8) & 0xff;
+
+  i2c_regs->ctrl = I2C_CTRL_EN; //| I2C_CTRL_IE;	// enable core
+}
+
+static inline void
+wait_for_xfer(const uint32_t base)
+{
+  while (i2c_regs->cmd_status & I2C_ST_TIP)	// wait for xfer to complete
+    ;
+}
+
+static inline bool
+wait_chk_ack(const uint32_t base)
+{
+  wait_for_xfer(base);
+
+  if ((i2c_regs->cmd_status & I2C_ST_RXACK) != 0){	// target NAK'd
+    return false;
+  }
+  return true;
+}
+
+bool wb_i2c_read(const uint32_t base, const uint8_t i2c_addr, uint8_t *buf, size_t len)
+{
+  if (len == 0)			// reading zero bytes always works
+    return true;
+
+  while (i2c_regs->cmd_status & I2C_ST_BUSY)
+    ;
+
+  i2c_regs->data = (i2c_addr << 1) | 1;	 // 7 bit address and read bit (1)
+  // generate START and write addr
+  i2c_regs->cmd_status = I2C_CMD_WR | I2C_CMD_START;
+  if (!wait_chk_ack(base))
+    goto fail;
+
+  for (; len > 0; buf++, len--){
+    i2c_regs->cmd_status = I2C_CMD_RD | (len == 1 ? (I2C_CMD_NACK | I2C_CMD_STOP) : 0);
+    wait_for_xfer(base);
+    *buf = i2c_regs->data;
+  }
+  return true;
+
+ fail:
+  i2c_regs->cmd_status = I2C_CMD_STOP;  // generate STOP
+  return false;
+}
+
+bool wb_i2c_write(const uint32_t base, const uint8_t i2c_addr, const uint8_t *buf, size_t len)
+{
+  while (i2c_regs->cmd_status & I2C_ST_BUSY)
+    ;
+
+  i2c_regs->data = (i2c_addr << 1) | 0;	 // 7 bit address and write bit (0)
+
+  // generate START and write addr (and maybe STOP)
+  i2c_regs->cmd_status = I2C_CMD_WR | I2C_CMD_START | (len == 0 ? I2C_CMD_STOP : 0);
+  if (!wait_chk_ack(base))
+    goto fail;
+
+  for (; len > 0; buf++, len--){
+    i2c_regs->data = *buf;
+    i2c_regs->cmd_status = I2C_CMD_WR | (len == 1 ? I2C_CMD_STOP : 0);
+    if (!wait_chk_ack(base))
+      goto fail;
+  }
+  return true;
+
+ fail:
+  i2c_regs->cmd_status = I2C_CMD_STOP;  // generate STOP
+  return false;
+}
+
diff --git a/firmware/x300/lib/wb_pkt_iface64.c b/firmware/x300/lib/wb_pkt_iface64.c
new file mode 100644
index 000000000..3c0774bdd
--- /dev/null
+++ b/firmware/x300/lib/wb_pkt_iface64.c
@@ -0,0 +1,87 @@
+// Copyright 2012 Ettus Research LLC
+
+#include <wb_pkt_iface64.h>
+#include <wb_utils.h>
+#include <printf.h>
+
+#define NUM_BYTES_MASK 0x1fff
+
+static uint32_t get_status(wb_pkt_iface64_config_t *config)
+{
+    return wb_peek32(config->config_addr);
+}
+
+static void set_control(wb_pkt_iface64_config_t *config)
+{
+    wb_poke32(config->config_addr, config->ctrl);
+}
+
+wb_pkt_iface64_config_t wb_pkt_iface64_init(const uint32_t base, const size_t ctrl_offset)
+{
+    wb_pkt_iface64_config_t config;
+    config.base = base;
+    config.ctrl = 0;
+    config.config_addr = base + ctrl_offset;
+    set_control(&config);
+    wb_pkt_iface64_rx_release(&config); //always release, in case left in a filled state
+    return config;
+}
+
+const void *wb_pkt_iface64_rx_try_claim(wb_pkt_iface64_config_t *config, size_t *num_bytes)
+{
+    const uint32_t status = get_status(config);
+    const uint32_t rx_state_flag = (status >> 31) & 0x1;
+    *num_bytes = (status & NUM_BYTES_MASK);
+    //if (*num_bytes & 0x7) *num_bytes -= 8; //adjust for tuser
+    if (rx_state_flag == 0) return NULL;
+    return (void *)config->base;
+}
+
+void wb_pkt_iface64_rx_release(wb_pkt_iface64_config_t *config)
+{
+    config->ctrl |= 1ul << 31; //does a release
+    set_control(config);
+    while (true)
+    {
+        const uint32_t status = get_status(config);
+        const uint32_t rx_state_flag = (status >> 31) & 0x1;
+        if (rx_state_flag == 0)
+        {
+            config->ctrl &= ~(1ul << 31); //allows for next claim
+            set_control(config);
+            return;
+        }
+    }
+}
+
+void *wb_pkt_iface64_tx_claim(wb_pkt_iface64_config_t *config)
+{
+    while (true)
+    {
+        const uint32_t status = get_status(config);
+        const uint32_t tx_state_flag = (status >> 30) & 0x1;
+        if (tx_state_flag == 1) break;
+    }
+    return (void *)config->base;
+}
+
+void wb_pkt_iface64_tx_submit(wb_pkt_iface64_config_t *config, size_t num_bytes)
+{
+    config->ctrl |= (1ul << 30); //allows for next claim
+    config->ctrl &= ~(NUM_BYTES_MASK); //clear num bytes
+    if (num_bytes & 0x7) num_bytes += 8; //adjust for tuser
+    config->ctrl |= num_bytes & NUM_BYTES_MASK; //set num bytes
+    set_control(config);
+
+    //wait for state machine to transition
+    while (true)
+    {
+        const uint32_t status = get_status(config);
+        const uint32_t tx_state_flag = (status >> 30) & 0x1;
+        if (tx_state_flag == 0) break;
+    }
+
+    config->ctrl &= ~(1ul << 30); //release
+    set_control(config);
+
+}
diff --git a/firmware/x300/lib/wb_uart.c b/firmware/x300/lib/wb_uart.c
new file mode 100644
index 000000000..368d0e150
--- /dev/null
+++ b/firmware/x300/lib/wb_uart.c
@@ -0,0 +1,34 @@
+// Copyright 2012 Ettus Research LLC
+
+#include <wb_uart.h>
+#include <wb_utils.h>
+
+localparam SUART_CLKDIV = 0;
+localparam SUART_TXLEVEL = 1;
+localparam SUART_RXLEVEL = 2;
+localparam SUART_TXCHAR = 3;
+localparam SUART_RXCHAR = 4;
+
+void wb_uart_init(const uint32_t base, const size_t div)
+{
+    wb_poke32(base + SUART_CLKDIV*4, div);
+}
+
+void wb_uart_putc(const uint32_t base, const int ch)
+{
+    while (wb_peek32(base + SUART_TXLEVEL*4) == 0);
+    wb_poke32(base + SUART_TXCHAR*4, ch);
+}
+
+bool wb_uart_try_putc(const uint32_t base, const int ch)
+{
+    if (wb_peek32(base + SUART_TXLEVEL*4) == 0) return false;
+    wb_poke32(base + SUART_TXCHAR*4, ch);
+    return true;
+}
+
+int wb_uart_getc(const uint32_t base)
+{
+    if (wb_peek32(base + SUART_RXLEVEL*4) == 0) return -1;
+    return wb_peek32(base + SUART_RXCHAR*4);
+}
diff --git a/firmware/x300/lwip/lwip-1.3.1/CHANGELOG b/firmware/x300/lwip/lwip-1.3.1/CHANGELOG
new file mode 100644
index 000000000..a45765010
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/CHANGELOG
@@ -0,0 +1,2248 @@
+FUTURE
+
+  * TODO: The lwIP source code makes some invalid assumptions on processor
+    word-length, storage sizes and alignment. See the mailing lists for
+    problems with exoteric (/DSP) architectures showing these problems.
+    We still have to fix some of these issues neatly.
+
+  * TODO: the PPP code is broken in a few ways. There are namespace
+    collisions on BSD systems and many assumptions on word-length
+    (sizeof(int)). In ppp.c an assumption is made on the availability of
+    a thread subsystem. Either PPP needs to be moved to contrib/ports/???
+    or rearranged to be more generic.
+
+HISTORY
+
+(CVS HEAD)
+
+  * [Enter new changes just after this line - do not remove this line]
+
+  ++ New features:
+
+  ++ Bugfixes:
+
+
+(STABLE-1.3.1)
+
+  ++ New features:
+
+  2009-05-10 Simon Goldschmidt
+  * opt.h, sockets.c, pbuf.c, netbuf.h, pbuf.h: task #7013: Added option
+    LWIP_NETIF_TX_SINGLE_PBUF to try to create transmit packets from only
+    one pbuf to help MACs that don't support scatter-gather DMA.
+
+  2009-05-09 Simon Goldschmidt
+  * icmp.h, icmp.c: Shrinked ICMP code, added option to NOT check icoming
+    ECHO pbuf for size (just use it): LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
+
+  2009-05-05 Simon Goldschmidt, Jakob Stoklund Olesen
+  * ip.h, ip.c: Added ip_current_netif() & ip_current_header() to receive
+    extended info about the currently received packet.
+
+  2009-04-27 Simon Goldschmidt
+  * sys.h: Made SYS_LIGHTWEIGHT_PROT and sys_now() work with NO_SYS=1
+
+  2009-04-25 Simon Goldschmidt
+  * mem.c, opt.h: Added option MEM_USE_POOLS_TRY_BIGGER_POOL to try the next
+    bigger malloc pool if one is empty (only usable with MEM_USE_POOLS).
+
+  2009-04-21 Simon Goldschmidt
+  * dns.c, init.c, dns.h, opt.h: task #7507, patch #6786: DNS supports static
+    hosts table. New configuration options DNS_LOCAL_HOSTLIST and
+    DNS_LOCAL_HOSTLIST_IS_DYNAMIC. Also, DNS_LOOKUP_LOCAL_EXTERN() can be defined
+    as an external function for lookup.
+
+  2009-04-15 Simon Goldschmidt
+  * dhcp.c: patch #6763: Global DHCP XID can be redefined to something more unique
+
+  2009-03-31 Kieran Mansley
+  * tcp.c, tcp_out.c, tcp_in.c, sys.h, tcp.h, opts.h: add support for
+    TCP timestamp options, off by default.  Rework tcp_enqueue() to
+    take option flags rather than specified option data
+
+  2009-02-18 Simon Goldschmidt
+  * cc.h: Added printf formatter for size_t: SZT_F
+
+  2009-02-16 Simon Goldschmidt (patch by Rishi Khan)
+  * icmp.c, opt.h: patch #6539: (configurable) response to broadcast- and multicast
+    pings
+
+  2009-02-12 Simon Goldschmidt
+  * init.h: Added LWIP_VERSION to get the current version of the stack
+
+  2009-02-11 Simon Goldschmidt (suggested by Gottfried Spitaler)
+  * opt.h, memp.h/.c: added MEMP_MEM_MALLOC to use mem_malloc/mem_free instead
+    of the pool allocator (can save code size with MEM_LIBC_MALLOC if libc-malloc
+    is otherwise used)
+
+  2009-01-28 Jonathan Larmour (suggested by Bill Bauerbach)
+  * ipv4/inet_chksum.c, ipv4/lwip/inet_chksum.h: inet_chksum_pseudo_partial()
+  is only used by UDPLITE at present, so conditionalise it.
+
+  2008-12-03 Simon Goldschmidt (base on patch from Luca Ceresoli)
+  * autoip.c: checked in (slightly modified) patch #6683: Customizable AUTOIP
+    "seed" address. This should reduce AUTOIP conflicts if
+    LWIP_AUTOIP_CREATE_SEED_ADDR is overridden.
+
+  2008-10-02 Jonathan Larmour and Rishi Khan
+  * sockets.c (lwip_accept): Return EWOULDBLOCK if would block on non-blocking
+    socket.
+
+  2008-06-30 Simon Goldschmidt
+  * mem.c, opt.h, stats.h: fixed bug #21433: Calling mem_free/pbuf_free from
+    interrupt context isn't safe: LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT allows
+    mem_free to run between mem_malloc iterations. Added illegal counter for
+    mem stats.
+
+  2008-06-27 Simon Goldschmidt
+  * stats.h/.c, some other files: patch #6483: stats module improvement:
+    Added defines to display each module's statistic individually, added stats
+    defines for MEM, MEMP and SYS modules, removed (unused) rexmit counter.
+
+  2008-06-17 Simon Goldschmidt
+  * err.h: patch #6459: Made err_t overridable to use a more efficient type
+    (define LWIP_ERR_T in cc.h)
+
+  2008-06-17 Simon Goldschmidt
+  * slipif.c: patch #6480: Added a configuration option for slipif for symmetry
+    to loopif
+
+  2008-06-17 Simon Goldschmidt (patch by Luca Ceresoli)
+  * netif.c, loopif.c, ip.c, netif.h, loopif.h, opt.h: Checked in slightly
+    modified version of patch # 6370: Moved loopif code to netif.c so that
+    loopback traffic is supported on all netifs (all local IPs).
+    Added option to limit loopback packets for each netifs.
+
+
+  ++ Bugfixes:
+  2009-08-12 Kieran Mansley
+  * tcp_in.c, tcp.c: Fix bug #27209: handle trimming of segments when
+    out of window or out of order properly
+
+  2009-08-12 Kieran Mansley
+  * tcp_in.c: Fix bug #27199: use snd_wl2 instead of snd_wl1
+
+  2009-07-28 Simon Goldschmidt
+  * mem.h: Fixed bug #27105: "realloc() cannot replace mem_realloc()"s
+
+  2009-07-27 Kieran Mansley
+  * api.h api_msg.h netdb.h sockets.h: add missing #include directives
+
+  2009-07-09 Kieran Mansley
+  * api_msg.c, sockets.c, api.h: BUG23240 use signed counters for
+    recv_avail and don't increment counters until message successfully
+    sent to mbox
+
+  2009-06-25 Kieran Mansley
+  * api_msg.c api.h: BUG26722: initialise netconn write variables 
+    in netconn_alloc
+
+  2009-06-25 Kieran Mansley
+  * tcp.h: BUG26879: set ret value in TCP_EVENT macros when function is not set
+
+  2009-06-25 Kieran Mansley
+  * tcp.c, tcp_in.c, tcp_out.c, tcp.h: BUG26301 and BUG26267: correct
+    simultaneous close behaviour, and make snd_nxt have the same meaning 
+    as in the RFCs.
+
+  2009-05-12 Simon Goldschmidt
+  * etharp.h, etharp.c, netif.c: fixed bug #26507: "Gratuitous ARP depends on
+    arp_table / uses etharp_query" by adding etharp_gratuitous()
+
+  2009-05-12 Simon Goldschmidt
+  * ip.h, ip.c, igmp.c: bug #26487: Added ip_output_if_opt that can add IP options
+    to the IP header (used by igmp_ip_output_if)
+
+  2009-05-06 Simon Goldschmidt
+  * inet_chksum.c: On little endian architectures, use LWIP_PLATFORM_HTONS (if
+    defined) for SWAP_BYTES_IN_WORD to speed up checksumming.
+
+  2009-05-05 Simon Goldschmidt
+  * sockets.c: bug #26405: Prematurely released semaphore causes lwip_select()
+    to crash
+
+  2009-05-04 Simon Goldschmidt
+  * init.c: snmp was not initialized in lwip_init()
+
+  2009-05-04 Frédéric Bernon
+  * dhcp.c, netbios.c: Changes if IP_SOF_BROADCAST is enabled.
+
+  2009-05-03 Simon Goldschmidt
+  * tcp.h: bug #26349: Nagle algorithm doesn't send although segment is full
+    (and unsent->next == NULL)
+
+  2009-05-02 Simon Goldschmidt
+  * tcpip.h, tcpip.c: fixed tcpip_untimeout (does not need the time, broken after
+    1.3.0 in CVS only) - fixes compilation of ppp_oe.c
+
+  2009-05-02 Simon Goldschmidt
+  * msg_in.c: fixed bug #25636: SNMPSET value is ignored for integer fields
+
+  2009-05-01 Simon Goldschmidt
+  * pap.c: bug #21680: PPP upap_rauthnak() drops legal NAK packets
+
+  2009-05-01 Simon Goldschmidt
+  * ppp.c: bug #24228: Memory corruption with PPP and DHCP
+
+  2009-04-29 Frédéric Bernon
+  * raw.c, udp.c, init.c, opt.h, ip.h, sockets.h: bug #26309: Implement the
+    SO(F)_BROADCAST filter for all API layers. Avoid the unindented reception
+    of broadcast packets even when this option wasn't set. Port maintainers
+    which want to enable this filter have to set IP_SOF_BROADCAST=1 in opt.h.
+    If you want this option also filter broadcast on recv operations, you also
+    have to set IP_SOF_BROADCAST_RECV=1 in opt.h.
+
+  2009-04-28 Simon Goldschmidt, Jakob Stoklund Olesen
+  * dhcp.c: patch #6721, bugs #25575, #25576: Some small fixes to DHCP and
+    DHCP/AUTOIP cooperation
+
+  2009-04-25 Simon Goldschmidt, Oleg Tyshev
+  * tcp_out.c: bug #24212: Deadlocked tcp_retransmit due to exceeded pcb->cwnd
+    Fixed by sorting the unsent and unacked queues (segments are inserted at the
+    right place in tcp_output and tcp_rexmit).
+
+  2009-04-25 Simon Goldschmidt
+  * memp.c, mem.c, memp.h, mem_std.h: bug #26213 "Problem with memory allocation
+    when debugging": memp_sizes contained the wrong sizes (including sanity
+    regions); memp pools for MEM_USE_POOLS were too small
+
+  2009-04-24 Simon Goldschmidt, Frédéric Bernon
+  * inet.c: patch #6765: Fix a small problem with the last changes (incorrect
+    behavior, with with ip address string not ended by a '\0', a space or a
+    end of line)
+
+  2009-04-19 Simon Goldschmidt
+  * rawapi.txt: Fixed bug #26069: Corrected documentation: if tcp_connect fails,
+    pcb->err is called, not pcb->connected (with an error code).
+
+  2009-04-19 Simon Goldschmidt
+  * tcp_out.c: Fixed bug #26236: "TCP options (timestamp) don't work with
+    no-copy-tcpwrite": deallocate option data, only concat segments with same flags
+
+  2009-04-19 Simon Goldschmidt
+  * tcp_out.c: Fixed bug #25094: "Zero-length pbuf" (options are now allocated
+    in the header pbuf, not the data pbuf)
+
+  2009-04-18 Simon Goldschmidt
+  * api_msg.c: fixed bug #25695: Segmentation fault in do_writemore()
+
+  2009-04-15 Simon Goldschmidt
+  * sockets.c: tried to fix bug #23559: lwip_recvfrom problem with tcp
+
+  2009-04-15 Simon Goldschmidt
+  * dhcp.c: task #9192: mem_free of dhcp->options_in and dhcp->msg_in
+
+  2009-04-15 Simon Goldschmidt
+  * ip.c, ip6.c, tcp_out.c, ip.h: patch #6808: Add a utility function
+    ip_hinted_output() (for smaller code mainly)
+
+  2009-04-15 Simon Goldschmidt
+  * inet.c: patch #6765: Supporting new line characters in inet_aton()
+
+  2009-04-15 Simon Goldschmidt
+  * dhcp.c: patch #6764: DHCP rebind and renew did not send hostnam option;
+    Converted constant OPTION_MAX_MSG_SIZE to netif->mtu, check if netif->mtu
+    is big enough in dhcp_start
+
+  2009-04-15 Simon Goldschmidt
+  * netbuf.c: bug #26027: netbuf_chain resulted in pbuf memory leak
+
+  2009-04-15 Simon Goldschmidt
+  * sockets.c, ppp.c: bug #25763: corrected 4 occurrences of SMEMCPY to MEMCPY
+
+  2009-04-15 Simon Goldschmidt
+  * sockets.c: bug #26121: set_errno can be overridden
+
+  2009-04-09 Kieran Mansley (patch from Luca Ceresoli <lucaceresoli>)
+  * init.c, opt.h: Patch#6774 TCP_QUEUE_OOSEQ breaks compilation when
+    LWIP_TCP==0
+
+  2009-04-09 Kieran Mansley (patch from Roy Lee <roylee17>)
+  * tcp.h: Patch#6802 Add do-while-clauses to those function like
+    macros in tcp.h
+
+  2009-03-31 Kieran Mansley
+  * tcp.c, tcp_in.c, tcp_out.c, tcp.h, opt.h: Rework the way window
+    updates are calculated and sent (BUG20515)
+
+  * tcp_in.c: cope with SYN packets received during established states,
+    and retransmission of initial SYN.
+
+  * tcp_out.c: set push bit correctly when tcp segments are merged
+
+  2009-03-27 Kieran Mansley
+  * tcp_out.c set window correctly on probes (correcting change made
+    yesterday)
+
+  2009-03-26 Kieran Mansley
+  * tcp.c, tcp_in.c, tcp.h: add tcp_abandon() to cope with dropping
+    connections where no reset required (bug #25622)
+
+  * tcp_out.c: set TCP_ACK flag on keepalive and zero window probes 
+    (bug #20779)
+
+  2009-02-18 Simon Goldschmidt (Jonathan Larmour and Bill Auerbach)
+  * ip_frag.c: patch #6528: the buffer used for IP_FRAG_USES_STATIC_BUF could be
+    too small depending on MEM_ALIGNMENT
+
+  2009-02-16 Simon Goldschmidt
+  * sockets.h/.c, api_*.h/.c: fixed arguments of socket functions to match the standard;
+    converted size argument of netconn_write to 'size_t'
+
+  2009-02-16 Simon Goldschmidt
+  * tcp.h, tcp.c: fixed bug #24440: TCP connection close problem on 64-bit host
+    by moving accept callback function pointer to TCP_PCB_COMMON
+
+  2009-02-12 Simon Goldschmidt
+  * dhcp.c: fixed bug #25345 (DHCPDECLINE is sent with "Maximum message size"
+    option)
+
+  2009-02-11 Simon Goldschmidt
+  * dhcp.c: fixed bug #24480 (releasing old udp_pdb and pbuf in dhcp_start)
+
+  2009-02-11 Simon Goldschmidt
+  * opt.h, api_msg.c: added configurable default valud for netconn->recv_bufsize:
+    RECV_BUFSIZE_DEFAULT (fixes bug #23726: pbuf pool exhaustion on slow recv())
+
+  2009-02-10 Simon Goldschmidt
+  * tcp.c: fixed bug #25467: Listen backlog is not reset on timeout in SYN_RCVD:
+    Accepts_pending is decrease on a corresponding listen pcb when a connection
+    in state SYN_RCVD is close.
+
+  2009-01-28 Jonathan Larmour
+  * pbuf.c: reclaim pbufs from TCP out-of-sequence segments if we run
+    out of pool pbufs.
+
+  2008-12-19 Simon Goldschmidt
+  * many files: patch #6699: fixed some warnings on platform where sizeof(int) == 2 
+
+  2008-12-10 Tamas Somogyi, Frédéric Bernon
+  * sockets.c: fixed bug #25051: lwip_recvfrom problem with udp: fromaddr and
+    port uses deleted netbuf.
+
+  2008-10-18 Simon Goldschmidt
+  * tcp_in.c: fixed bug ##24596: Vulnerability on faulty TCP options length
+    in tcp_parseopt
+
+  2008-10-15 Simon Goldschmidt
+  * ip_frag.c: fixed bug #24517: IP reassembly crashes on unaligned IP headers
+    by packing the struct ip_reass_helper.
+
+  2008-10-03 David Woodhouse, Jonathan Larmour
+  * etharp.c (etharp_arp_input): Fix type aliasing problem copying ip address.
+
+  2008-10-02 Jonathan Larmour
+  * dns.c: Hard-code structure sizes, to avoid issues on some compilers where
+    padding is included.
+
+  2008-09-30 Jonathan Larmour
+  * sockets.c (lwip_accept): check addr isn't NULL. If it's valid, do an
+    assertion check that addrlen isn't NULL.
+
+  2008-09-30 Jonathan Larmour
+  * tcp.c: Fix bug #24227, wrong error message in tcp_bind.
+
+  2008-08-26 Simon Goldschmidt
+  * inet.h, ip_addr.h: fixed bug #24132: Cross-dependency between ip_addr.h and
+    inet.h -> moved declaration of struct in_addr from ip_addr.h to inet.h
+
+  2008-08-14 Simon Goldschmidt
+  * api_msg.c: fixed bug #23847: do_close_internal references freed memory (when
+    tcp_close returns != ERR_OK)
+
+  2008-07-08 Frédéric Bernon
+  * stats.h: Fix some build bugs introduced with patch #6483 (missing some parameters
+    in macros, mainly if MEM_STATS=0 and MEMP_STATS=0).
+
+  2008-06-24 Jonathan Larmour
+  * tcp_in.c: Fix for bug #23693 as suggested by Art R. Ensure cseg is unused
+    if tcp_seg_copy fails.
+
+  2008-06-17 Simon Goldschmidt
+  * inet_chksum.c: Checked in some ideas of patch #6460 (loop optimizations)
+    and created defines for swapping bytes and folding u32 to u16.
+
+  2008-05-30 Kieran Mansley
+  * tcp_in.c Remove redundant "if" statement, and use real rcv_wnd
+    rather than rcv_ann_wnd when deciding if packets are in-window.
+    Contributed by <arasmussen@consultant.datasys.swri.edu>
+
+  2008-05-30 Kieran Mansley
+  * mem.h: Fix BUG#23254.  Change macro definition of mem_* to allow
+    passing as function pointers when MEM_LIBC_MALLOC is defined.
+
+  2008-05-09 Jonathan Larmour
+  * err.h, err.c, sockets.c: Fix bug #23119: Reorder timeout error code to
+    stop it being treated as a fatal error.
+
+  2008-04-15 Simon Goldschmidt
+  * dhcp.c: fixed bug #22804: dhcp_stop doesn't clear NETIF_FLAG_DHCP
+    (flag now cleared)
+
+  2008-03-27 Simon Goldschmidt
+  * mem.c, tcpip.c, tcpip.h, opt.h: fixed bug #21433 (Calling mem_free/pbuf_free
+    from interrupt context isn't safe): set LWIP_USE_HEAP_FROM_INTERRUPT to 1
+    in lwipopts.h or use pbuf_free_callback(p)/mem_free_callback(m) to free pbufs
+    or heap memory from interrupt context
+
+  2008-03-26 Simon Goldschmidt
+  * tcp_in.c, tcp.c: fixed bug #22249: division by zero could occur if a remote
+    host sent a zero mss as TCP option.
+
+
+(STABLE-1.3.0)
+
+  ++ New features:
+
+  2008-03-10 Jonathan Larmour
+  * inet_chksum.c: Allow choice of one of the sample algorithms to be
+    made from lwipopts.h. Fix comment on how to override LWIP_CHKSUM.
+
+  2008-01-22 Frédéric Bernon
+  * tcp.c, tcp_in.c, tcp.h, opt.h: Rename LWIP_CALCULATE_EFF_SEND_MSS in 
+    TCP_CALCULATE_EFF_SEND_MSS to have coherent TCP options names.
+
+  2008-01-14 Frédéric Bernon
+  * rawapi.txt, api_msg.c, tcp.c, tcp_in.c, tcp.h: changes for task #7675 "Enable
+    to refuse data on a TCP_EVENT_RECV call". Important, behavior changes for the
+    tcp_recv callback (see rawapi.txt).
+
+  2008-01-14 Frédéric Bernon, Marc Chaland
+  * ip.c: Integrate patch #6369" ip_input : checking before realloc".
+  
+  2008-01-12 Frédéric Bernon
+  * tcpip.h, tcpip.c, api.h, api_lib.c, api_msg.c, sockets.c: replace the field
+    netconn::sem per netconn::op_completed like suggested for the task #7490
+    "Add return value to sys_mbox_post".
+
+  2008-01-12 Frédéric Bernon
+  * api_msg.c, opt.h: replace DEFAULT_RECVMBOX_SIZE per DEFAULT_TCP_RECVMBOX_SIZE,
+    DEFAULT_UDP_RECVMBOX_SIZE and DEFAULT_RAW_RECVMBOX_SIZE (to optimize queues
+    sizes), like suggested for the task #7490 "Add return value to sys_mbox_post".
+
+  2008-01-10 Frédéric Bernon
+  * tcpip.h, tcpip.c: add tcpip_callback_with_block function for the task #7490
+    "Add return value to sys_mbox_post". tcpip_callback is always defined as
+    "blocking" ("block" parameter = 1).
+
+  2008-01-10 Frédéric Bernon
+  * tcpip.h, tcpip.c, api.h, api_lib.c, api_msg.c, sockets.c: replace the field
+    netconn::mbox (sys_mbox_t) per netconn::sem (sys_sem_t) for the task #7490
+    "Add return value to sys_mbox_post".
+
+  2008-01-05 Frédéric Bernon
+  * sys_arch.txt, api.h, api_lib.c, api_msg.h, api_msg.c, tcpip.c, sys.h, opt.h:
+    Introduce changes for task #7490 "Add return value to sys_mbox_post" with some
+    modifications in the sys_mbox api: sys_mbox_new take a "size" parameters which
+    indicate the number of pointers query by the mailbox. There is three defines
+    in opt.h to indicate sizes for tcpip::mbox, netconn::recvmbox, and for the 
+    netconn::acceptmbox. Port maintainers, you can decide to just add this new 
+    parameter in your implementation, but to ignore it to keep the previous behavior.
+    The new sys_mbox_trypost function return a value to know if the mailbox is
+    full or if the message is posted. Take a look to sys_arch.txt for more details.
+    This new function is used in tcpip_input (so, can be called in an interrupt
+    context since the function is not blocking), and in recv_udp and recv_raw.
+
+  2008-01-04 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
+  * rawapi.txt, api.h, api_lib.c, api_msg.h, api_msg.c, sockets.c, tcp.h, tcp.c,
+    tcp_in.c, init.c, opt.h: rename backlog options with TCP_ prefix, limit the
+    "backlog" parameter in an u8_t, 0 is interpreted as "smallest queue", add
+    documentation in the rawapi.txt file.
+
+  2007-12-31 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
+  * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Add TCP persist timer
+
+  2007-12-31 Frédéric Bernon, Luca Ceresoli
+  * autoip.c, etharp.c: ip_addr.h: Integrate patch #6348: "Broadcast ARP packets
+    in autoip". The change in etharp_raw could be removed, since all calls to
+    etharp_raw use ethbroadcast for the "ethdst_addr" parameter. But it could be
+    wrong in the future.
+
+  2007-12-30 Frédéric Bernon, Tom Evans
+  * ip.c: Fix bug #21846 "LwIP doesn't appear to perform any IP Source Address
+    Filtering" reported by Tom Evans.
+
+  2007-12-21 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
+  * tcp.h, opt.h, api.h, api_msg.h, tcp.c, tcp_in.c, api_lib.c, api_msg.c,
+    sockets.c, init.c: task #7252: Implement TCP listen backlog: Warning: raw API
+    applications have to call 'tcp_accepted(pcb)' in their accept callback to
+    keep accepting new connections.
+
+  2007-12-13 Frédéric Bernon
+  * api_msg.c, err.h, err.c, sockets.c, dns.c, dns.h: replace "enum dns_result"
+    by err_t type. Add a new err_t code "ERR_INPROGRESS".
+
+  2007-12-12 Frédéric Bernon
+  * dns.h, dns.c, opt.h: move DNS options to the "right" place. Most visibles
+    are the one which have ram usage.
+
+  2007-12-05 Frédéric Bernon
+  * netdb.c: add a LWIP_DNS_API_HOSTENT_STORAGE option to decide to use a static
+    set of variables (=0) or a local one (=1). In this last case, your port should
+    provide a function "struct hostent* sys_thread_hostent( struct hostent* h)"
+    which have to do a copy of "h" and return a pointer ont the "per-thread" copy.
+
+  2007-12-03 Simon Goldschmidt
+  * ip.c: ip_input: check if a packet is for inp first before checking all other
+    netifs on netif_list (speeds up packet receiving in most cases)
+
+  2007-11-30 Simon Goldschmidt
+  * udp.c, raw.c: task #7497: Sort lists (pcb, netif, ...) for faster access
+    UDP: move a (connected) pcb selected for input to the front of the list of
+    pcbs so that it is found faster next time. Same for RAW pcbs that have eaten
+    a packet.
+
+  2007-11-28 Simon Goldschmidt
+  * etharp.c, stats.c, stats.h, opt.h: Introduced ETHARP_STATS
+
+  2007-11-25 Simon Goldschmidt
+  * dhcp.c: dhcp_unfold_reply() uses pbuf_copy_partial instead of its own copy
+    algorithm.
+
+  2007-11-24 Simon Goldschmidt
+  * netdb.h, netdb.c, sockets.h/.c: Moved lwip_gethostbyname from sockets.c
+    to the new file netdb.c; included lwip_getaddrinfo.
+
+  2007-11-21 Simon Goldschmidt
+  * tcp.h, opt.h, tcp.c, tcp_in.c: implemented calculating the effective send-mss
+    based on the MTU of the netif used to send. Enabled by default. Disable by
+    setting LWIP_CALCULATE_EFF_SEND_MSS to 0. This fixes bug #21492.
+
+  2007-11-19 Frédéric Bernon
+  * api_msg.c, dns.h, dns.c: Implement DNS_DOES_NAME_CHECK option (check if name
+    received match the name query), implement DNS_USES_STATIC_BUF (the place where
+    copy dns payload to parse the response), return an error if there is no place
+    for a new query, and fix some minor problems.
+
+  2007-11-16 Simon Goldschmidt
+  * new files: ipv4/inet.c, ipv4/inet_chksum.c, ipv6/inet6.c
+    removed files: core/inet.c, core/inet6.c
+    Moved inet files into ipv4/ipv6 directory; splitted inet.c/inet.h into
+    inet and chksum part; changed includes in all lwIP files as appropriate
+
+  2007-11-16 Simon Goldschmidt
+  * api.h, api_msg.h, api_lib.c, api_msg.c, socket.h, socket.c: Added sequential
+    dns resolver function for netconn api (netconn_gethostbyname) and socket api
+    (gethostbyname/gethostbyname_r).
+
+  2007-11-15 Jim Pettinato, Frédéric Bernon
+  * opt.h, init.c, tcpip.c, dhcp.c, dns.h, dns.c: add DNS client for simple name
+    requests with RAW api interface. Initialization is done in lwip_init() with
+    build time options. DNS timer is added in tcpip_thread context. DHCP can set
+    DNS server ip addresses when options are received. You need to set LWIP_DNS=1
+    in your lwipopts.h file (LWIP_DNS=0 in opt.h). DNS_DEBUG can be set to get
+    some traces with LWIP_DEBUGF. Sanity check have been added. There is a "todo"
+    list with points to improve.
+
+  2007-11-06 Simon Goldschmidt
+  * opt.h, mib2.c: Patch #6215: added ifAdminStatus write support (if explicitly
+    enabled by defining SNMP_SAFE_REQUESTS to 0); added code to check link status
+    for ifOperStatus if LWIP_NETIF_LINK_CALLBACK is defined.
+
+  2007-11-06 Simon Goldschmidt
+  * api.h, api_msg.h and dependent files: Task #7410: Removed the need to include
+    core header files in api.h (ip/tcp/udp/raw.h) to hide the internal
+    implementation from netconn api applications.
+
+  2007-11-03 Frédéric Bernon
+  * api.h, api_lib.c, api_msg.c, sockets.c, opt.h: add SO_RCVBUF option for UDP &
+    RAW netconn. You need to set LWIP_SO_RCVBUF=1 in your lwipopts.h (it's disabled
+    by default). Netconn API users can use the netconn_recv_bufsize macro to access
+    it. This is a first release which have to be improve for TCP. Note it used the
+    netconn::recv_avail which need to be more "thread-safe" (note there is already
+    the problem for FIONREAD with lwip_ioctl/ioctlsocket).
+
+  2007-11-01 Frédéric Bernon, Marc Chaland
+  * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, tcp.h, tcp_out.c:
+    Integrate "patch #6250 : MSG_MORE flag for send". MSG_MORE is used at socket api
+    layer, NETCONN_MORE at netconn api layer, and TCP_WRITE_FLAG_MORE at raw api
+    layer. This option enable to delayed TCP PUSH flag on multiple "write" calls.
+    Note that previous "copy" parameter for "write" APIs is now called "apiflags".
+
+  2007-10-24 Frédéric Bernon
+  * api.h, api_lib.c, api_msg.c: Add macro API_EVENT in the same spirit than 
+    TCP_EVENT_xxx macros to get a code more readable. It could also help to remove
+    some code (like we have talk in "patch #5919 : Create compile switch to remove
+    select code"), but it could be done later.
+
+  2007-10-08 Simon Goldschmidt
+  * many files: Changed initialization: many init functions are not needed any
+    more since we now rely on the compiler initializing global and static
+    variables to zero!
+
+  2007-10-06 Simon Goldschmidt
+  * ip_frag.c, memp.c, mib2.c, ip_frag.h, memp_std.h, opt.h: Changed IP_REASSEMBLY
+    to enqueue the received pbufs so that multiple packets can be reassembled
+    simultaneously and no static reassembly buffer is needed.
+
+  2007-10-05 Simon Goldschmidt
+  * tcpip.c, etharp.h, etharp.c: moved ethernet_input from tcpip.c to etharp.c so
+    all netifs (or ports) can use it.
+
+  2007-10-05 Frédéric Bernon
+  * netifapi.h, netifapi.c: add function netifapi_netif_set_default. Change the 
+    common function to reduce a little bit the footprint (for all functions using
+    only the "netif" parameter).
+
+  2007-10-03 Frédéric Bernon
+  * netifapi.h, netifapi.c: add functions netifapi_netif_set_up, netifapi_netif_set_down,
+    netifapi_autoip_start and netifapi_autoip_stop. Use a common function to reduce
+    a little bit the footprint (for all functions using only the "netif" parameter).
+
+  2007-09-15 Frédéric Bernon
+  * udp.h, udp.c, sockets.c: Changes for "#20503 IGMP Improvement". Add IP_MULTICAST_IF
+    option in socket API, and a new field "multicast_ip" in "struct udp_pcb" (for
+    netconn and raw API users), only if LWIP_IGMP=1. Add getsockopt processing for
+    IP_MULTICAST_TTL and IP_MULTICAST_IF.
+
+  2007-09-10 Frédéric Bernon
+  * snmp.h, mib2.c: enable to remove SNMP timer (which consumne several cycles
+    even when it's not necessary). snmp_agent.txt tell to call snmp_inc_sysuptime()
+    each 10ms (but, it's intrusive if you use sys_timeout feature). Now, you can
+    decide to call snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but
+    call to a lower frequency). Or, you can decide to not call snmp_inc_sysuptime()
+    or snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
+    This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
+    snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
+    when it's queried (any direct call to "sysuptime" is changed by a call to 
+    snmp_get_sysuptime).
+
+  2007-09-09 Frédéric Bernon, Bill Florac
+  * igmp.h, igmp.c, netif.h, netif.c, ip.c: To enable to have interfaces with IGMP,
+    and others without it, there is a new NETIF_FLAG_IGMP flag to set in netif->flags
+    if you want IGMP on an interface. igmp_stop() is now called inside netif_remove().
+    igmp_report_groups() is now called inside netif_set_link_up() (need to have
+    LWIP_NETIF_LINK_CALLBACK=1) to resend reports once the link is up (avoid to wait
+    the next query message to receive the matching multicast streams).
+
+  2007-09-08 Frédéric Bernon
+  * sockets.c, ip.h, api.h, tcp.h: declare a "struct ip_pcb" which only contains
+    IP_PCB. Add in the netconn's "pcb" union a "struct ip_pcb *ip;" (no size change).
+    Use this new field to access to common pcb fields (ttl, tos, so_options, etc...).
+    Enable to access to these fields with LWIP_TCP=0.
+
+  2007-09-05 Frédéric Bernon
+  * udp.c, ipv4/icmp.c, ipv4/ip.c, ipv6/icmp.c, ipv6/ip6.c, ipv4/icmp.h,
+    ipv6/icmp.h, opt.h: Integrate "task #7272 : LWIP_ICMP option". The new option
+    LWIP_ICMP enable/disable ICMP module inside the IP stack (enable per default).
+    Be careful, disabling ICMP make your product non-compliant to RFC1122, but
+    help to reduce footprint, and to reduce "visibility" on the Internet.
+
+  2007-09-05 Frédéric Bernon, Bill Florac
+  * opt.h, sys.h, tcpip.c, slipif.c, ppp.c, sys_arch.txt: Change parameters list
+    for sys_thread_new (see "task #7252 : Create sys_thread_new_ex()"). Two new
+    parameters have to be provided: a task name, and a task stack size. For this
+    one, since it's platform dependant, you could define the best one for you in
+    your lwipopts.h. For port maintainers, you can just add these new parameters
+    in your sys_arch.c file, and but it's not mandatory, use them in your OS
+    specific functions.
+
+  2007-09-05 Frédéric Bernon
+  * inet.c, autoip.c, msg_in.c, msg_out.c, init.c: Move some build time checkings
+    inside init.c for task #7142 "Sanity check user-configurable values".
+
+  2007-09-04 Frédéric Bernon, Bill Florac
+  * igmp.h, igmp.c, memp_std.h, memp.c, init.c, opt.h: Replace mem_malloc call by
+    memp_malloc, and use a new MEMP_NUM_IGMP_GROUP option (see opt.h to define the
+    value). It will avoid potential fragmentation problems, use a counter to know
+    how many times a group is used on an netif, and free it when all applications
+    leave it. MEMP_NUM_IGMP_GROUP got 8 as default value (and init.c got a sanity
+    check if LWIP_IGMP!=0).
+
+  2007-09-03 Frédéric Bernon
+  * igmp.h, igmp.c, sockets.c, api_msg.c: Changes for "#20503 IGMP Improvement".
+    Initialize igmp_mac_filter to NULL in netif_add (this field should be set in
+    the netif's "init" function). Use the "imr_interface" field (for socket layer)
+    and/or the "interface" field (for netconn layer), for join/leave operations.
+    The igmp_join/leavegroup first parameter change from a netif to an ipaddr.
+    This field could be a netif's ipaddr, or "any" (same meaning than ip_addr_isany).
+
+  2007-08-30 Frédéric Bernon
+  * Add netbuf.h, netbuf.c, Change api.h, api_lib.c: #7249 "Split netbuf functions
+    from api/api_lib". Now netbuf API is independant of netconn, and can be used
+    with other API (application based on raw API, or future "socket2" API). Ports
+    maintainers just have to add src/api/netbuf.c in their makefile/projects.
+
+  2007-08-30 Frédéric Bernon, Jonathan Larmour
+  * init.c: Add first version of lwip_sanity_check for task #7142 "Sanity check
+    user-configurable values".
+
+  2007-08-29 Frédéric Bernon
+  * igmp.h, igmp.c, tcpip.c, init.c, netif.c: change igmp_init and add igmp_start.
+    igmp_start is call inside netif_add. Now, igmp initialization is in the same
+    spirit than the others modules. Modify some IGMP debug traces.
+
+  2007-08-29 Frédéric Bernon
+  * Add init.h, init.c, Change opt.h, tcpip.c: Task  #7213 "Add a lwip_init function"
+    Add lwip_init function to regroup all modules initializations, and to provide
+    a place to add code for task #7142 "Sanity check user-configurable values".
+    Ports maintainers should remove direct initializations calls from their code,
+    and add init.c in their makefiles. Note that lwip_init() function is called
+    inside tcpip_init, but can also be used by raw api users since all calls are
+    disabled when matching options are disabled. Also note that their is new options
+    in opt.h, you should configure in your lwipopts.h (they are enabled per default).
+
+  2007-08-26 Marc Boucher
+  * api_msg.c: do_close_internal(): Reset the callbacks and arg (conn) to NULL
+    since they can under certain circumstances be called with an invalid conn
+    pointer after the connection has been closed (and conn has been freed). 
+
+  2007-08-25 Frédéric Bernon (Artem Migaev's Patch)
+  * netif.h, netif.c: Integrate "patch #6163 : Function to check if link layer is up".
+    Add a netif_is_link_up() function if LWIP_NETIF_LINK_CALLBACK option is set.
+
+  2007-08-22 Frédéric Bernon
+  * netif.h, netif.c, opt.h: Rename LWIP_NETIF_CALLBACK in LWIP_NETIF_STATUS_CALLBACK
+    to be coherent with new LWIP_NETIF_LINK_CALLBACK option before next release.
+
+  2007-08-22 Frédéric Bernon
+  * tcpip.h, tcpip.c, ethernetif.c, opt.h: remove options ETHARP_TCPIP_INPUT &
+    ETHARP_TCPIP_ETHINPUT, now, only "ethinput" code is supported, even if the 
+    name is tcpip_input (we keep the name of 1.2.0 function).
+
+  2007-08-17 Jared Grubb
+  * memp_std.h, memp.h, memp.c, mem.c, stats.c: (Task #7136) Centralize mempool 
+    settings into new memp_std.h and optional user file lwippools.h. This adds
+    more dynamic mempools, and allows the user to create an arbitrary number of
+    mempools for mem_malloc.
+
+  2007-08-16 Marc Boucher
+  * api_msg.c: Initialize newconn->state to NETCONN_NONE in accept_function;
+    otherwise it was left to NETCONN_CLOSE and sent_tcp() could prematurely
+    close the connection.
+
+  2007-08-16 Marc Boucher
+  * sockets.c: lwip_accept(): check netconn_peer() error return.
+
+  2007-08-16 Marc Boucher
+  * mem.c, mem.h: Added mem_calloc().
+
+  2007-08-16 Marc Boucher
+  * tcpip.c, tcpip.h memp.c, memp.h: Added distinct memp (MEMP_TCPIP_MSG_INPKT)
+    for input packets to prevent floods from consuming all of MEMP_TCPIP_MSG
+    and starving other message types.
+    Renamed MEMP_TCPIP_MSG to MEMP_TCPIP_MSG_API
+
+  2007-08-16 Marc Boucher
+  * pbuf.c, pbuf.h, etharp.c, tcp_in.c, sockets.c: Split pbuf flags in pbuf
+    type and flgs (later renamed to flags).
+    Use enum pbuf_flag as pbuf_type.  Renumber PBUF_FLAG_*.
+    Improved lwip_recvfrom().  TCP push now propagated.
+
+  2007-08-16 Marc Boucher
+  * ethernetif.c, contrib/ports/various: ethbroadcast now a shared global
+    provided by etharp.
+
+  2007-08-16 Marc Boucher
+  * ppp_oe.c ppp_oe.h, auth.c chap.c fsm.c lcp.c ppp.c ppp.h,
+    etharp.c ethernetif.c, etharp.h, opt.h tcpip.h, tcpip.c:
+    Added PPPoE support and various PPP improvements.
+
+  2007-07-25 Simon Goldschmidt
+  * api_lib.c, ip_frag.c, pbuf.c, api.h, pbuf.h: Introduced pbuf_copy_partial,
+    making netbuf_copy_partial use this function.
+
+  2007-07-25 Simon Goldschmidt
+  * tcp_in.c: Fix bug #20506: Slow start / initial congestion window starts with
+    2 * mss (instead of 1 * mss previously) to comply with some newer RFCs and
+    other stacks.
+
+  2007-07-13 Jared Grubb (integrated by Frédéric Bernon)
+  * opt.h, netif.h, netif.c, ethernetif.c: Add new configuration option to add
+    a link callback in the netif struct, and functions to handle it. Be carefull
+    for port maintainers to add the NETIF_FLAG_LINK_UP flag (like in ethernetif.c)
+    if you want to be sure to be compatible with future changes...
+
+  2007-06-30 Frédéric Bernon
+  * sockets.h, sockets.c: Implement MSG_PEEK flag for recv/recvfrom functions.
+
+  2007-06-21 Simon Goldschmidt
+  * etharp.h, etharp.c: Combined etharp_request with etharp_raw for both
+    LWIP_AUTOIP =0 and =1 to remove redundant code.
+
+  2007-06-21 Simon Goldschmidt
+  * mem.c, memp.c, mem.h, memp.h, opt.h: task #6863: Introduced the option
+    MEM_USE_POOLS to use 4 pools with different sized elements instead of a
+    heap. This both prevents memory fragmentation and gives a higher speed
+    at the cost of more memory consumption. Turned off by default.
+
+  2007-06-21 Simon Goldschmidt
+  * api_lib.c, api_msg.c, api.h, api_msg.h: Converted the length argument of
+    netconn_write (and therefore also api_msg_msg.msg.w.len) from u16_t into
+    int to be able to send a bigger buffer than 64K with one time (mainly
+    used from lwip_send).
+
+  2007-06-21 Simon Goldschmidt
+  * tcp.h, api_msg.c: Moved the nagle algorithm from netconn_write/do_write
+    into a define (tcp_output_nagle) in tcp.h to provide it to raw api users, too.
+
+  2007-06-21 Simon Goldschmidt
+  * api.h, api_lib.c, api_msg.c: Fixed bug #20021: Moved sendbuf-processing in
+    netconn_write from api_lib.c to api_msg.c to also prevent multiple context-
+    changes on low memory or empty send-buffer.
+
+  2007-06-18 Simon Goldschmidt
+  * etharp.c, etharp.h: Changed etharp to use a defined hardware address length
+    of 6 to avoid loading netif->hwaddr_len every time (since this file is only
+    used for ethernet and struct eth_addr already had a defined length of 6).
+
+  2007-06-17 Simon Goldschmidt
+  * sockets.c, sockets.h: Implemented socket options SO_NO_CHECK for UDP sockets
+    to disable UDP checksum generation on transmit.
+
+  2007-06-13 Frédéric Bernon, Simon Goldschmidt
+  * debug.h, api_msg.c: change LWIP_ERROR to use it to check errors like invalid
+    pointers or parameters, and let the possibility to redefined it in cc.h. Use
+    this macro to check "conn" parameter in api_msg.c functions.
+
+  2007-06-11 Simon Goldschmidt
+  * sockets.c, sockets.h: Added UDP lite support for sockets
+
+  2007-06-10 Simon Goldschmidt
+  * udp.h, opt.h, api_msg.c, ip.c, udp.c: Included switch LWIP_UDPLITE (enabled
+    by default) to switch off UDP-Lite support if not needed (reduces udp.c code
+    size)
+
+  2007-06-09 Dominik Spies (integrated by Frédéric Bernon)
+  * autoip.h, autoip.c, dhcp.h, dhcp.c, netif.h, netif.c, etharp.h, etharp.c, opt.h:
+    AutoIP implementation available for IPv4, with new options LWIP_AUTOIP and
+    LWIP_DHCP_AUTOIP_COOP if you want to cooperate with DHCP. Some tips to adapt
+    (see TODO mark in the source code).
+
+  2007-06-09 Simon Goldschmidt
+  * etharp.h, etharp.c, ethernetif.c: Modified order of parameters for
+    etharp_output() to match netif->output so etharp_output() can be used
+    directly as netif->output to save one function call.
+
+  2007-06-08 Simon Goldschmidt
+  * netif.h, ethernetif.c, slipif.c, loopif.c: Added define
+    NETIF_INIT_SNMP(netif, type, speed) to initialize per-netif snmp variables,
+    added initialization of those to ethernetif, slipif and loopif.
+
+  2007-05-18 Simon Goldschmidt
+  * opt.h, ip_frag.c, ip_frag.h, ip.c: Added option IP_FRAG_USES_STATIC_BUF
+    (defaulting to off for now) that can be set to 0 to send fragmented
+    packets by passing PBUF_REFs down the stack.
+
+  2007-05-23 Frédéric Bernon
+  * api_lib.c: Implement SO_RCVTIMEO for accept and recv on TCP
+    connections, such present in patch #5959.
+
+  2007-05-23 Frédéric Bernon
+  * api.h, api_lib.c, api_msg.c, sockets.c: group the different NETCONN_UDPxxx
+    code in only one part...
+
+  2007-05-18 Simon Goldschmidt
+  * opt.h, memp.h, memp.c: Added option MEMP_OVERFLOW_CHECK to check for memp
+    elements to overflow. This is achieved by adding some bytes before and after
+    each pool element (increasing their size, of course), filling them with a
+    prominent value and checking them on freeing the element.
+    Set it to 2 to also check every element in every pool each time memp_malloc()
+    or memp_free() is called (slower but more helpful).
+
+  2007-05-10 Simon Goldschmidt
+  * opt.h, memp.h, memp.c, pbuf.c (see task #6831): use a new memp pool for
+    PBUF_POOL pbufs instead of the old pool implementation in pbuf.c to reduce
+    code size.
+
+  2007-05-11 Frédéric Bernon
+  * sockets.c, api_lib.c, api_msg.h, api_msg.c, netifapi.h, netifapi.c, tcpip.c:
+    Include a function pointer instead of a table index in the message to reduce
+    footprint. Disable some part of lwip_send and lwip_sendto if some options are
+    not set (LWIP_TCP, LWIP_UDP, LWIP_RAW).
+
+  2007-05-10 Simon Goldschmidt
+  * *.h (except netif/ppp/*.h): Included patch #5448: include '#ifdef __cplusplus
+    \ extern "C" {' in all header files. Now you can write your application using
+    the lwIP stack in C++ and simply #include the core files. Note I have left
+    out the netif/ppp/*h header files for now, since I don't know which files are
+    included by applications and which are for internal use only.
+
+  2007-05-09 Simon Goldschmidt
+  * opt.h, *.c/*.h: Included patch #5920: Create define to override C-library
+    memcpy. 2 Defines are created: MEMCPY() for normal memcpy, SMEMCPY() for
+    situations where some compilers might inline the copy and save a function
+    call. Also replaced all calls to memcpy() with calls to (S)MEMCPY().
+
+  2007-05-08 Simon Goldschmidt
+  * mem.h: If MEM_LIBC_MALLOC==1, allow the defines (e.g. mem_malloc() -> malloc())
+    to be overriden in case the C-library malloc implementation is not protected
+    against concurrent access.
+
+  2007-05-04 Simon Goldschmidt (Atte Kojo)
+  * etharp.c: Introduced fast one-entry-cache to speed up ARP lookup when sending
+    multiple packets to the same host.
+
+  2007-05-04 Frédéric Bernon, Jonathan Larmour
+  * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fix bug #19162 "lwip_sento: a possible
+    to corrupt remote addr/port connection state". Reduce problems "not enought memory" with
+    netbuf (if we receive lot of datagrams). Improve lwip_sendto (only one exchange between
+    sockets api and api_msg which run in tcpip_thread context). Add netconn_sento function.
+    Warning, if you directly access to "fromaddr" & "fromport" field from netbuf struct,
+    these fields are now renamed "addr" & "port".
+
+  2007-04-11 Jonathan Larmour
+  * sys.h, api_lib.c: Provide new sys_mbox_tryfetch function. Require ports to provide new
+    sys_arch_mbox_tryfetch function to get a message if one is there, otherwise return
+    with SYS_MBOX_EMPTY. sys_arch_mbox_tryfetch can be implemented as a function-like macro
+    by the port in sys_arch.h if desired.
+
+  2007-04-06 Frédéric Bernon, Simon Goldschmidt
+  * opt.h, tcpip.h, tcpip.c, netifapi.h, netifapi.c: New configuration option LWIP_NETIF_API
+    allow to use thread-safe functions to add/remove netif in list, and to start/stop dhcp
+    clients, using new functions from netifapi.h. Disable as default (no port change to do).
+
+  2007-04-05 Frédéric Bernon
+  * sockets.c: remplace ENOBUFS errors on alloc_socket by ENFILE to be more BSD compliant.
+
+  2007-04-04 Simon Goldschmidt
+  * arch.h, api_msg.c, dhcp.c, msg_in.c, sockets.c: Introduced #define LWIP_UNUSED_ARG(x)
+    use this for and architecture-independent form to tell the compiler you intentionally
+    are not using this variable. Can be overriden in cc.h.
+
+  2007-03-28 Frédéric Bernon
+  * opt.h, netif.h, dhcp.h, dhcp.c: New configuration option LWIP_NETIF_HOSTNAME allow to
+    define a hostname in netif struct (this is just a pointer, so, you can use a hardcoded
+    string, point on one of your's ethernetif field, or alloc a string you will free yourself).
+    It will be used by DHCP to register a client hostname, but can also be use when you call
+    snmp_set_sysname.
+
+  2007-03-28 Frédéric Bernon
+  * netif.h, netif.c: A new NETIF_FLAG_ETHARP flag is defined in netif.h, to allow to 
+    initialize a network interface's flag with. It tell this interface is an ethernet
+    device, and we can use ARP with it to do a "gratuitous ARP" (RFC 3220 "IP Mobility
+    Support for IPv4" section 4.6) when interface is "up" with netif_set_up().
+
+  2007-03-26 Frédéric Bernon, Jonathan Larmour
+  * opt.h, tcpip.c: New configuration option LWIP_ARP allow to disable ARP init at build
+    time if you only use PPP or SLIP. The default is enable. Note we don't have to call 
+    etharp_init in your port's initilization sequence if you use tcpip.c, because this call
+    is done in tcpip_init function.
+
+  2007-03-22 Frédéric Bernon
+  * stats.h, stats.c, msg_in.c: Stats counters can be change to u32_t if necessary with the
+    new option LWIP_STATS_LARGE. If you need this option, define LWIP_STATS_LARGE to 1 in
+    your lwipopts.h. More, unused counters are not defined in the stats structs, and not 
+    display by stats_display(). Note that some options (SYS_STATS and RAW_STATS) are defined
+    but never used. Fix msg_in.c with the correct #if test for a stat display.
+
+  2007-03-21 Kieran Mansley
+  * netif.c, netif.h: Apply patch#4197 with some changes (originator: rireland@hmgsl.com). 
+    Provides callback on netif up/down state change.
+
+  2007-03-11 Frédéric Bernon, Mace Gael, Steve Reynolds
+  * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, igmp.h, igmp.c,
+    ip.c, netif.h, tcpip.c, opt.h:
+    New configuration option LWIP_IGMP to enable IGMP processing. Based on only one 
+    filter per all network interfaces. Declare a new function in netif to enable to
+    control the MAC filter (to reduce lwIP traffic processing).
+
+  2007-03-11 Frédéric Bernon
+  * tcp.h, tcp.c, sockets.c, tcp_out.c, tcp_in.c, opt.h: Keepalive values can
+    be configured at run time with LWIP_TCP_KEEPALIVE, but don't change this
+    unless you know what you're doing (default are RFC1122 compliant). Note
+    that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set in seconds.
+
+  2007-03-08 Frédéric Bernon
+  * tcp.h: Keepalive values can be configured at compile time, but don't change
+    this unless you know what you're doing (default are RFC1122 compliant).
+
+  2007-03-08 Frédéric Bernon
+  * sockets.c, api.h, api_lib.c, tcpip.c, sys.h, sys.c, err.c, opt.h:
+    Implement LWIP_SO_RCVTIMEO configuration option to enable/disable SO_RCVTIMEO
+    on UDP sockets/netconn.
+
+  2007-03-08 Simon Goldschmidt
+  * snmp_msg.h, msg_in.c: SNMP UDP ports can be configured at compile time.
+
+  2007-03-06 Frédéric Bernon
+  * api.h, api_lib.c, sockets.h, sockets.c, tcpip.c, sys.h, sys.c, err.h: 
+    Implement SO_RCVTIMEO on UDP sockets/netconn.
+
+  2007-02-28 Kieran Mansley (based on patch from Simon Goldschmidt)
+  * api_lib.c, tcpip.c, memp.c, memp.h: make API msg structs allocated
+    on the stack and remove the API msg type from memp
+
+  2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
+  * sockets.h, sockets.c: Move socket initialization to new
+    lwip_socket_init() function.
+    NOTE: this changes the API with ports. Ports will have to be
+    updated to call lwip_socket_init() now.
+
+  2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
+  * api_lib.c: Use memcpy in netbuf_copy_partial.
+
+
+  ++ Bug fixes:
+
+  2008-03-17 Frédéric Bernon, Ed Kerekes
+  * igmp.h, igmp.c: Fix bug #22613 "IGMP iphdr problem" (could have
+    some problems to fill the IP header on some targets, use now the
+    ip.h macros to do it).
+
+  2008-03-13 Frédéric Bernon
+  * sockets.c: Fix bug #22435 "lwip_recvfrom with TCP break;". Using
+    (lwip_)recvfrom with valid "from" and "fromlen" parameters, on a
+    TCP connection caused a crash. Note that using (lwip_)recvfrom
+    like this is a bit slow and that using (lwip)getpeername is the
+    good lwip way to do it (so, using recv is faster on tcp sockets).
+
+  2008-03-12 Frédéric Bernon, Jonathan Larmour
+  * api_msg.c, contrib/apps/ping.c: Fix bug #22530 "api_msg.c's
+    recv_raw() does not consume data", and the ping sample (with
+    LWIP_SOCKET=1, the code did the wrong supposition that lwip_recvfrom
+    returned the IP payload, without the IP header).
+
+  2008-03-04 Jonathan Larmour
+  * mem.c, stats.c, mem.h: apply patch #6414 to avoid compiler errors
+  and/or warnings on some systems where mem_size_t and size_t differ.
+  * pbuf.c, ppp.c: Fix warnings on some systems with mem_malloc.
+
+  2008-03-04 Kieran Mansley (contributions by others) 
+  * Numerous small compiler error/warning fixes from contributions to
+    mailing list after 1.3.0 release candidate made.
+
+  2008-01-25 Cui hengbin (integrated by Frédéric Bernon)
+  * dns.c: Fix bug #22108 "DNS problem" caused by unaligned structures.
+
+  2008-01-15 Kieran Mansley
+  * tcp_out.c: BUG20511.  Modify persist timer to start when we are
+    prevented from sending by a small send window, not just a zero
+    send window.
+
+  2008-01-09 Jonathan Larmour
+  * opt.h, ip.c: Rename IP_OPTIONS define to IP_OPTIONS_ALLOWED to avoid
+    conflict with Linux system headers.
+
+  2008-01-06 Jonathan Larmour
+  * dhcp.c: fix bug #19927: "DHCP NACK problem" by clearing any existing set IP
+    address entirely on receiving a DHCPNAK, and restarting discovery.
+
+  2007-12-21 Simon Goldschmidt
+  * sys.h, api_lib.c, api_msg.c, sockets.c: fix bug #21698: "netconn->recv_avail
+    is not protected" by using new macros for interlocked access to modify/test
+    netconn->recv_avail.
+
+  2007-12-20 Kieran Mansley (based on patch from Oleg Tyshev)
+  * tcp_in.c: fix bug# 21535 (nrtx not reset correctly in SYN_SENT state)
+
+  2007-12-20 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
+  * tcp.c, tcp_in.c, tcp_out.c, tcp.h: fix bug #20199 (better handling
+    of silly window avoidance and prevent lwIP from shrinking the window)
+
+  2007-12-04 Simon Goldschmidt
+  * tcp.c, tcp_in.c: fix bug #21699 (segment leak in ooseq processing when last
+    data packet was lost): add assert that all segment lists are empty in
+    tcp_pcb_remove before setting pcb to CLOSED state; don't directly set CLOSED
+    state from LAST_ACK in tcp_process
+
+  2007-12-02 Simon Goldschmidt
+  * sockets.h: fix bug #21654: exclude definition of struct timeval from #ifndef FD_SET
+    If including <sys/time.h> for system-struct timeval, LWIP_TIMEVAL_PRIVATE now
+    has to be set to 0 in lwipopts.h
+
+  2007-12-02 Simon Goldschmidt
+  * api_msg.c, api_lib.c: fix bug #21656 (recvmbox problem in netconn API): always
+    allocate a recvmbox in netconn_new_with_proto_and_callback. For a tcp-listen
+    netconn, this recvmbox is later freed and a new mbox is allocated for acceptmbox.
+    This is a fix for thread-safety and allocates all items needed for a netconn
+    when the netconn is created.
+
+  2007-11-30 Simon Goldschmidt
+  * udp.c: first attempt to fix bug #21655 (DHCP doesn't work reliably with multiple
+    netifs): if LWIP_DHCP is enabled, UDP packets to DHCP_CLIENT_PORT are passed
+    to netif->dhcp->pcb only (if that exists) and not to any other pcb for the same
+    port (only solution to let UDP pcbs 'bind' to a netif instead of an IP address)
+
+  2007-11-27 Simon Goldschmidt
+  * ip.c: fixed bug #21643 (udp_send/raw_send don't fail if netif is down) by
+    letting ip_route only use netifs that are up.
+
+  2007-11-27 Simon Goldschmidt
+  * err.h, api_lib.c, api_msg.c, sockets.c: Changed error handling: ERR_MEM, ERR_BUF
+    and ERR_RTE are seen as non-fatal, all other errors are fatal. netconns and
+    sockets block most operations once they have seen a fatal error.
+
+  2007-11-27 Simon Goldschmidt
+  * udp.h, udp.c, dhcp.c: Implemented new function udp_sendto_if which takes the
+    netif to send as an argument (to be able to send on netifs that are down).
+
+  2007-11-26 Simon Goldschmidt
+  * tcp_in.c: Fixed bug #21582: pcb->acked accounting can be wrong when ACKs
+    arrive out-of-order
+
+  2007-11-21 Simon Goldschmidt
+  * tcp.h, tcp_out.c, api_msg.c: Fixed bug #20287: tcp_output_nagle sends too early
+    Fixed the nagle algorithm; nagle now also works for all raw API applications
+    and has to be explicitly disabled with 'tcp_pcb->flags |= TF_NODELAY'
+
+  2007-11-12 Frédéric Bernon
+  * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fixed bug #20900. Now, most
+    of the netconn_peer and netconn_addr processing is done inside tcpip_thread
+    context in do_getaddr.
+
+  2007-11-10 Simon Goldschmidt
+  * etharp.c: Fixed bug: assert fired when MEMP_ARP_QUEUE was empty (which can
+    happen any time). Now the packet simply isn't enqueued when out of memory.
+
+  2007-11-01 Simon Goldschmidt
+  * tcp.c, tcp_in.c: Fixed bug #21494: The send mss (pcb->mss) is set to 536 (or
+    TCP_MSS if that is smaller) as long as no MSS option is received from the
+    remote host.
+
+  2007-11-01 Simon Goldschmidt
+  * tcp.h, tcp.c, tcp_in.c: Fixed bug #21491: The MSS option sent (with SYN)
+    is now based on TCP_MSS instead of pcb->mss (on passive open now effectively
+    sending our configured TCP_MSS instead of the one received).
+
+  2007-11-01 Simon Goldschmidt
+  * tcp_in.c: Fixed bug #21181: On active open, the initial congestion window was
+    calculated based on the configured TCP_MSS, not on the MSS option received
+    with SYN+ACK.
+
+  2007-10-09 Simon Goldschmidt
+  * udp.c, inet.c, inet.h: Fixed UDPLite: send: Checksum was always generated too
+    short and also was generated wrong if checksum coverage != tot_len;
+    receive: checksum was calculated wrong if checksum coverage != tot_len
+
+  2007-10-08 Simon Goldschmidt
+  * mem.c: lfree was not updated in mem_realloc!
+
+  2007-10-07 Frédéric Bernon
+  * sockets.c, api.h, api_lib.c: First step to fix "bug #20900 : Potential
+    crash error problem with netconn_peer & netconn_addr". VERY IMPORTANT:
+    this change cause an API breakage for netconn_addr, since a parameter
+    type change. Any compiler should cause an error without any changes in
+    yours netconn_peer calls (so, it can't be a "silent change"). It also
+    reduce a little bit the footprint for socket layer (lwip_getpeername &
+    lwip_getsockname use now a common lwip_getaddrname function since 
+    netconn_peer & netconn_addr have the same parameters).
+
+  2007-09-20 Simon Goldschmidt
+  * tcp.c: Fixed bug #21080 (tcp_bind without check pcbs in TIME_WAIT state)
+    by checking  tcp_tw_pcbs also
+
+  2007-09-19 Simon Goldschmidt
+  * icmp.c: Fixed bug #21107 (didn't reset IP TTL in ICMP echo replies)
+
+  2007-09-15 Mike Kleshov
+  * mem.c: Fixed bug #21077 (inaccuracy in calculation of lwip_stat.mem.used)
+
+  2007-09-06 Frédéric Bernon
+  * several-files: replace some #include "arch/cc.h" by "lwip/arch.h", or simply remove
+    it as long as "lwip/opt.h" is included before (this one include "lwip/debug.h" which
+    already include "lwip/arch.h"). Like that, default defines are provided by "lwip/arch.h"
+    if they are not defined in cc.h, in the same spirit than "lwip/opt.h" for lwipopts.h.
+
+  2007-08-30 Frédéric Bernon
+  * igmp.h, igmp.c: Some changes to remove some redundant code, add some traces, 
+    and fix some coding style.
+
+  2007-08-28 Frédéric Bernon
+  * tcpip.c: Fix TCPIP_MSG_INPKT processing: now, tcpip_input can be used for any
+    kind of packets. These packets are considered like Ethernet packets (payload 
+    pointing to ethhdr) if the netif got the NETIF_FLAG_ETHARP flag. Else, packets 
+    are considered like IP packets (payload pointing to iphdr).
+
+  2007-08-27 Frédéric Bernon
+  * api.h, api_lib.c, api_msg.c: First fix for "bug #20900 : Potential crash error
+    problem with netconn_peer & netconn_addr". Introduce NETCONN_LISTEN netconn_state
+    and remove obsolete ones (NETCONN_RECV & NETCONN_ACCEPT).
+
+  2007-08-24 Kieran Mansley
+  * inet.c Modify (acc >> 16) test to ((acc >> 16) != 0) to help buggy
+    compiler (Paradigm C++)
+
+  2007-08-09 Frédéric Bernon, Bill Florac
+  * stats.h, stats.c, igmp.h, igmp.c, opt.h: Fix for bug #20503 : IGMP Improvement.
+    Introduce IGMP_STATS to centralize statistics management.
+
+  2007-08-09 Frédéric Bernon, Bill Florac
+  * udp.c: Fix for bug #20503 : IGMP Improvement. Enable to receive a multicast
+    packet on a udp pcb binded on an netif's IP address, and not on "any".
+
+  2007-08-09 Frédéric Bernon, Bill Florac
+  * igmp.h, igmp.c, ip.c: Fix minor changes from bug #20503 : IGMP Improvement.
+    This is mainly on using lookup/lookfor, and some coding styles...
+
+  2007-07-26 Frédéric Bernon (and "thedoctor")
+  * igmp.c: Fix bug #20595 to accept IGMPv3 "Query" messages.
+
+  2007-07-25 Simon Goldschmidt
+  * api_msg.c, tcp.c: Another fix for bug #20021: by not returning an error if
+    tcp_output fails in tcp_close, the code in do_close_internal gets simpler
+    (tcp_output is called again later from tcp timers).
+
+  2007-07-25 Simon Goldschmidt
+  * ip_frag.c: Fixed bug #20429: use the new pbuf_copy_partial instead of the old
+    copy_from_pbuf, which illegally modified the given pbuf.
+
+  2007-07-25 Simon Goldschmidt
+  * tcp_out.c: tcp_enqueue: pcb->snd_queuelen didn't work for chaine PBUF_RAMs:
+    changed snd_queuelen++ to snd_queuelen += pbuf_clen(p).
+
+  2007-07-24 Simon Goldschmidt
+  * api_msg.c, tcp.c: Fix bug #20480: Check the pcb passed to tcp_listen() for the
+    correct state (must be CLOSED).
+
+  2007-07-13 Thomas Taranowski (commited by Jared Grubb)
+  * memp.c: Fix bug #20478: memp_malloc returned NULL+MEMP_SIZE on failed
+    allocation. It now returns NULL.
+
+  2007-07-13 Frédéric Bernon
+  * api_msg.c: Fix bug #20318: api_msg "recv" callbacks don't call pbuf_free in
+    all error cases.
+
+  2007-07-13 Frédéric Bernon
+  * api_msg.c: Fix bug #20315: possible memory leak problem if tcp_listen failed,
+    because current code doesn't follow rawapi.txt documentation.
+
+  2007-07-13 Kieran Mansley
+  * src/core/tcp_in.c Apply patch#5741 from Oleg Tyshev to fix bug in
+    out of sequence processing of received packets
+
+  2007-07-03 Simon Goldschmidt
+  * nearly-all-files: Added assertions where PBUF_RAM pbufs are used and an
+    assumption is made that this pbuf is in one piece (i.e. not chained). These
+    assumptions clash with the possibility of converting to fully pool-based
+    pbuf implementations, where PBUF_RAM pbufs might be chained.
+
+  2007-07-03 Simon Goldschmidt
+  * api.h, api_lib.c, api_msg.c: Final fix for bug #20021 and some other problems
+    when closing tcp netconns: removed conn->sem, less context switches when
+    closing, both netconn_close and netconn_delete should safely close tcp
+    connections.
+
+  2007-07-02 Simon Goldschmidt
+  * ipv4/ip.h, ipv6/ip.h, opt.h, netif.h, etharp.h, ipv4/ip.c, netif.c, raw.c,
+    tcp_out.c, udp.c, etharp.c: Added option LWIP_NETIF_HWADDRHINT (default=off)
+    to cache ARP table indices with each pcb instead of single-entry cache for
+    the complete stack.
+
+  2007-07-02 Simon Goldschmidt
+  * tcp.h, tcp.c, tcp_in.c, tcp_out.c: Added some ASSERTS and casts to prevent
+    warnings when assigning to smaller types.
+
+  2007-06-28 Simon Goldschmidt
+  * tcp_out.c: Added check to prevent tcp_pcb->snd_queuelen from overflowing.
+
+  2007-06-28 Simon Goldschmidt
+  * tcp.h: Fixed bug #20287: Fixed nagle algorithm (sending was done too early if
+    a segment contained chained pbufs)
+
+  2007-06-28 Frédéric Bernon
+  * autoip.c: replace most of rand() calls by a macro LWIP_AUTOIP_RAND which compute
+    a "pseudo-random" value based on netif's MAC and some autoip fields. It's always
+    possible to define this macro in your own lwipopts.h to always use C library's
+    rand(). Note that autoip_create_rand_addr doesn't use this macro.
+
+  2007-06-28 Frédéric Bernon
+  * netifapi.h, netifapi.c, tcpip.h, tcpip.c: Update code to handle the option
+    LWIP_TCPIP_CORE_LOCKING, and do some changes to be coherent with last modifications
+    in api_lib/api_msg (use pointers and not type with table, etc...) 
+
+  2007-06-26 Simon Goldschmidt
+  * udp.h: Fixed bug #20259: struct udp_hdr was lacking the packin defines.
+
+  2007-06-25 Simon Goldschmidt
+  * udp.c: Fixed bug #20253: icmp_dest_unreach was called with a wrong p->payload
+    for udp packets with no matching pcb.
+
+  2007-06-25 Simon Goldschmidt
+  * udp.c: Fixed bug #20220: UDP PCB search in udp_input(): a non-local match
+    could get udp input packets if the remote side matched.
+
+  2007-06-13 Simon Goldschmidt
+  * netif.c: Fixed bug #20180 (TCP pcbs listening on IP_ADDR_ANY could get
+    changed in netif_set_ipaddr if previous netif->ip_addr.addr was 0.
+
+  2007-06-13 Simon Goldschmidt
+  * api_msg.c: pcb_new sets conn->err if protocol is not implemented
+    -> netconn_new_..() does not allocate a new connection for unsupported
+    protocols.
+
+  2007-06-13 Frédéric Bernon, Simon Goldschmidt
+  * api_lib.c: change return expression in netconn_addr and netconn_peer, because
+    conn->err was reset to ERR_OK without any reasons (and error was lost)...
+
+  2007-06-13 Frédéric Bernon, Matthias Weisser
+  * opt.h, mem.h, mem.c, memp.c, pbuf.c, ip_frag.c, vj.c: Fix bug #20162. Rename
+    MEM_ALIGN in LWIP_MEM_ALIGN and MEM_ALIGN_SIZE in LWIP_MEM_ALIGN_SIZE to avoid
+    some macro names collision with some OS macros.
+
+  2007-06-11 Simon Goldschmidt
+  * udp.c: UDP Lite: corrected the use of chksum_len (based on RFC3828: if it's 0,
+    create checksum over the complete packet. On RX, if it's < 8 (and not 0),
+    discard the packet. Also removed the duplicate 'udphdr->chksum = 0' for both
+    UDP & UDP Lite.
+
+  2007-06-11 Srinivas Gollakota & Oleg Tyshev
+  * tcp_out.c: Fix for bug #20075 : "A problem with keep-alive timer and TCP flags"
+    where TCP flags wasn't initialized in tcp_keepalive.
+
+  2007-06-03 Simon Goldschmidt
+  * udp.c: udp_input(): Input pbuf was not freed if pcb had no recv function
+    registered, p->payload was modified without modifying p->len if sending
+    icmp_dest_unreach() (had no negative effect but was definitively wrong).
+
+  2007-06-03 Simon Goldschmidt
+  * icmp.c: Corrected bug #19937: For responding to an icmp echo request, icmp
+    re-used the input pbuf even if that didn't have enough space to include the
+    link headers. Now the space is tested and a new pbuf is allocated for the
+    echo response packet if the echo request pbuf isn't big enough.
+
+  2007-06-01 Simon Goldschmidt
+  * sockets.c: Checked in patch #5914: Moved sockopt processing into tcpip_thread.
+
+  2007-05-23 Frédéric Bernon
+  * api_lib.c, sockets.c: Fixed bug #5958 for netconn_listen (acceptmbox only
+    allocated by do_listen if success) and netconn_accept errors handling. In
+    most of api_lib functions, we replace some errors checkings like "if (conn==NULL)"
+    by ASSERT, except for netconn_delete.
+
+  2007-05-23 Frédéric Bernon
+  * api_lib.c: Fixed bug #5957 "Safe-thread problem inside netconn_recv" to return
+    an error code if it's impossible to fetch a pbuf on a TCP connection (and not
+    directly close the recvmbox).
+
+  2007-05-22 Simon Goldschmidt
+  * tcp.c: Fixed bug #1895 (tcp_bind not correct) by introducing a list of
+    bound but unconnected (and non-listening) tcp_pcbs.
+
+  2007-05-22 Frédéric Bernon
+  * sys.h, sys.c, api_lib.c, tcpip.c: remove sys_mbox_fetch_timeout() (was only
+    used for LWIP_SO_RCVTIMEO option) and use sys_arch_mbox_fetch() instead of
+    sys_mbox_fetch() in api files. Now, users SHOULD NOT use internal lwIP features
+    like "sys_timeout" in their application threads.
+
+  2007-05-22 Frédéric Bernon
+  * api.h, api_lib.c, api_msg.h, api_msg.c: change the struct api_msg_msg to see
+    which parameters are used by which do_xxx function, and to avoid "misusing"
+    parameters (patch #5938).
+
+  2007-05-22 Simon Goldschmidt
+  * api_lib.c, api_msg.c, raw.c, api.h, api_msg.h, raw.h: Included patch #5938:
+    changed raw_pcb.protocol from u16_t to u8_t since for IPv4 and IPv6, proto
+    is only 8 bits wide. This affects the api, as there, the protocol was
+    u16_t, too.
+
+  2007-05-18 Simon Goldschmidt
+  * memp.c: addition to patch #5913: smaller pointer was returned but
+    memp_memory was the same size -> did not save memory.
+
+  2007-05-16 Simon Goldschmidt
+  * loopif.c, slipif.c: Fix bug #19729: free pbuf if netif->input() returns
+    != ERR_OK.
+
+  2007-05-16 Simon Goldschmidt
+  * api_msg.c, udp.c: If a udp_pcb has a local_ip set, check if it is the same
+    as the one of the netif used for sending to prevent sending from old
+    addresses after a netif address gets changed (partly fixes bug #3168).
+
+  2007-05-16 Frédéric Bernon
+  * tcpip.c, igmp.h, igmp.c: Fixed bug "#19800 : IGMP: igmp_tick() will not work
+    with NO_SYS=1". Note that igmp_init is always in tcpip_thread (and not in 
+    tcpip_init) because we have to be sure that network interfaces are already
+    added (mac filter is updated only in igmp_init for the moment).
+
+  2007-05-16 Simon Goldschmidt
+  * mem.c, memp.c: Removed semaphores from memp, changed sys_sem_wait calls
+    into sys_arch_sem_wait calls to prevent timers from running while waiting
+    for the heap. This fixes bug #19167.
+
+  2007-05-13 Simon Goldschmidt
+  * tcp.h, sockets.h, sockets.c: Fixed bug from patch #5865 by moving the defines
+    for socket options (lwip_set/-getsockopt) used with level IPPROTO_TCP from
+    tcp.h to sockets.h.
+
+  2007-05-07 Simon Goldschmidt
+  * mem.c: Another attempt to fix bug #17922.
+
+  2007-05-04 Simon Goldschmidt
+  * pbuf.c, pbuf.h, etharp.c: Further update to ARP queueing: Changed pbuf_copy()
+    implementation so that it can be reused (don't allocate the target
+    pbuf inside pbuf_copy()).
+
+  2007-05-04 Simon Goldschmidt
+  * memp.c: checked in patch #5913: in memp_malloc() we can return memp as mem
+    to save a little RAM (next pointer of memp is not used while not in pool).
+
+  2007-05-03 "maq"
+  * sockets.c: Fix ioctl FIONREAD when some data remains from last recv.
+    (patch #3574).
+
+  2007-04-23 Simon Goldschmidt
+  * loopif.c, loopif.h, opt.h, src/netif/FILES: fix bug #2595: "loopif results
+    in NULL reference for incoming TCP packets". Loopif has to be configured
+    (using LWIP_LOOPIF_MULTITHREADING) to directly call netif->input()
+    (multithreading environments, e.g. netif->input() = tcpip_input()) or
+    putting packets on a list that is fed to the stack by calling loopif_poll()
+    (single-thread / NO_SYS / polling environment where e.g.
+    netif->input() = ip_input).
+
+  2007-04-17 Jonathan Larmour
+  * pbuf.c: Use s32_t in pbuf_realloc(), as an s16_t can't reliably hold
+    the difference between two u16_t's.
+  * sockets.h: FD_SETSIZE needs to match number of sockets, which is
+    MEMP_NUM_NETCONN in sockets.c right now.
+
+  2007-04-12 Jonathan Larmour
+  * icmp.c: Reset IP header TTL in ICMP ECHO responses (bug #19580).
+
+  2007-04-12 Kieran Mansley
+  * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Modify way the retransmission
+    timer is reset to fix bug#19434, with help from Oleg Tyshev.
+
+  2007-04-11 Simon Goldschmidt
+  * etharp.c, pbuf.c, pbuf.h: 3rd fix for bug #11400 (arp-queuing): More pbufs than
+    previously thought need to be copied (everything but PBUF_ROM!). Cleaned up
+    pbuf.c: removed functions no needed any more (by etharp).
+
+  2007-04-11 Kieran Mansley
+  * inet.c, ip_addr.h, sockets.h, sys.h, tcp.h: Apply patch #5745: Fix
+    "Constant is long" warnings with 16bit compilers.  Contributed by
+    avatar@mmlab.cse.yzu.edu.tw
+
+  2007-04-05 Frédéric Bernon, Jonathan Larmour
+  * api_msg.c: Fix bug #16830: "err_tcp() posts to connection mailbox when no pend on
+    the mailbox is active". Now, the post is only done during a connect, and do_send,
+    do_write and do_join_leave_group don't do anything if a previous error was signaled.
+
+  2007-04-03 Frédéric Bernon
+  * ip.c: Don't set the IP_DF ("Don't fragment") flag in the IP header in IP output
+    packets. See patch #5834.
+
+  2007-03-30 Frédéric Bernon
+  * api_msg.c: add a "pcb_new" helper function to avoid redundant code, and to add
+    missing  pcb allocations checking (in do_bind, and for each raw_new). Fix style.
+
+  2007-03-30 Frédéric Bernon
+  * most of files: prefix all debug.h define with "LWIP_" to avoid any conflict with
+    others environment defines (these were too "generic").
+
+  2007-03-28 Frédéric Bernon
+  * api.h, api_lib.c, sockets.c: netbuf_ref doesn't check its internal pbuf_alloc call
+    result and can cause a crash. lwip_send now check netbuf_ref result.
+
+  2007-03-28 Simon Goldschmidt
+  * sockets.c Remove "#include <errno.h>" from sockets.c to avoid multiple
+    definition of macros (in errno.h and lwip/arch.h) if LWIP_PROVIDE_ERRNO is
+    defined. This is the way it should have been already (looking at
+    doc/sys_arch.txt)
+
+  2007-03-28 Kieran Mansley
+  * opt.h Change default PBUF_POOL_BUFSIZE (again) to accomodate default MSS +
+    IP and TCP headers *and* physical link headers
+
+  2007-03-26 Frédéric Bernon (based on patch from Dmitry Potapov)
+  * api_lib.c: patch for netconn_write(), fixes a possible race condition which cause
+    to send some garbage. It is not a definitive solution, but the patch does solve
+    the problem for most cases.
+
+  2007-03-22 Frédéric Bernon
+  * api_msg.h, api_msg.c: Remove obsolete API_MSG_ACCEPT and do_accept (never used).
+
+  2007-03-22 Frédéric Bernon
+  * api_lib.c: somes resources couldn't be freed if there was errors during
+    netconn_new_with_proto_and_callback.
+
+  2007-03-22 Frédéric Bernon
+  * ethernetif.c: update netif->input calls to check return value. In older ports,
+    it's a good idea to upgrade them, even if before, there could be another problem
+    (access to an uninitialized mailbox).
+
+  2007-03-21 Simon Goldschmidt
+  * sockets.c: fixed bug #5067 (essentialy a signed/unsigned warning fixed
+    by casting to unsigned).
+
+  2007-03-21 Frédéric Bernon
+  * api_lib.c, api_msg.c, tcpip.c: integrate sys_mbox_fetch(conn->mbox, NULL) calls from
+    api_lib.c to tcpip.c's tcpip_apimsg(). Now, use a local variable and not a
+    dynamic one from memp to send tcpip_msg to tcpip_thread in a synchrone call.
+    Free tcpip_msg from tcpip_apimsg is not done in tcpip_thread. This give a
+    faster and more reliable communication between api_lib and tcpip.
+
+  2007-03-21 Frédéric Bernon
+  * opt.h: Add LWIP_NETIF_CALLBACK (to avoid compiler warning) and set it to 0.
+
+  2007-03-21 Frédéric Bernon
+  * api_msg.c, igmp.c, igmp.h: Fix C++ style comments
+
+  2007-03-21 Kieran Mansley
+  * opt.h Change default PBUF_POOL_BUFSIZE to accomodate default MSS +
+    IP and TCP headers
+
+  2007-03-21 Kieran Mansley
+  * Fix all uses of pbuf_header to check the return value.  In some
+    cases just assert if it fails as I'm not sure how to fix them, but
+    this is no worse than before when they would carry on regardless
+    of the failure.
+
+  2007-03-21 Kieran Mansley
+  * sockets.c, igmp.c, igmp.h, memp.h: Fix C++ style comments and
+    comment out missing header include in icmp.c
+
+  2007-03-20 Frédéric Bernon
+  * memp.h, stats.c: Fix stats_display function where memp_names table wasn't
+    synchronized with memp.h.
+
+  2007-03-20 Frédéric Bernon
+  * tcpip.c: Initialize tcpip's mbox, and verify if initialized in tcpip_input,
+    tcpip_ethinput, tcpip_callback, tcpip_apimsg, to fix a init problem with 
+    network interfaces. Also fix a compiler warning.
+
+  2007-03-20 Kieran Mansley
+  * udp.c: Only try and use pbuf_header() to make space for headers if
+    not a ROM or REF pbuf.
+
+  2007-03-19 Frédéric Bernon
+  * api_msg.h, api_msg.c, tcpip.h, tcpip.c: Add return types to tcpip_apimsg()
+    and api_msg_post().
+
+  2007-03-19 Frédéric Bernon
+  * Remove unimplemented "memp_realloc" function from memp.h.
+
+  2007-03-11 Simon Goldschmidt
+  * pbuf.c: checked in patch #5796: pbuf_alloc: len field claculation caused
+    memory corruption.
+
+  2007-03-11 Simon Goldschmidt (based on patch from Dmitry Potapov)
+  * api_lib.c, sockets.c, api.h, api_msg.h, sockets.h: Fixed bug #19251
+    (missing `const' qualifier in socket functions), to get more compatible to
+    standard POSIX sockets.
+
+  2007-03-11 Frédéric Bernon (based on patch from Dmitry Potapov)
+  * sockets.c: Add asserts inside bind, connect and sendto to check input
+    parameters. Remove excessive set_errno() calls after get_socket(), because
+    errno is set inside of get_socket(). Move last sock_set_errno() inside
+    lwip_close.
+
+  2007-03-09 Simon Goldschmidt
+  * memp.c: Fixed bug #11400: New etharp queueing introduced bug: memp_memory
+    was allocated too small.
+
+  2007-03-06 Simon Goldschmidt
+  * tcpip.c: Initialize dhcp timers in tcpip_thread (if LWIP_DHCP) to protect
+    the stack from concurrent access.
+
+  2007-03-06 Frédéric Bernon, Dmitry Potapov
+  * tcpip.c, ip_frag.c, ethernetif.c: Fix some build problems, and a redundancy
+    call to "lwip_stats.link.recv++;" in low_level_input() & ethernetif_input().
+
+  2007-03-06 Simon Goldschmidt
+  * ip_frag.c, ip_frag.h: Reduce code size: don't include code in those files
+    if IP_FRAG == 0 and IP_REASSEMBLY == 0
+
+  2007-03-06 Frédéric Bernon, Simon Goldschmidt
+  * opt.h, ip_frag.h, tcpip.h, tcpip.c, ethernetif.c: add new configuration
+    option named ETHARP_TCPIP_ETHINPUT, which enable the new tcpip_ethinput.
+    Allow to do ARP processing for incoming packets inside tcpip_thread
+    (protecting ARP layer against concurrent access). You can also disable
+    old code using tcp_input with new define ETHARP_TCPIP_INPUT set to 0.
+    Older ports have to use tcpip_ethinput.
+
+  2007-03-06 Simon Goldschmidt (based on patch from Dmitry Potapov)
+  * err.h, err.c: fixed compiler warning "initialization dircards qualifiers
+    from pointer target type"
+
+  2007-03-05 Frédéric Bernon
+  * opt.h, sockets.h: add new configuration options (LWIP_POSIX_SOCKETS_IO_NAMES,
+    ETHARP_TRUST_IP_MAC, review SO_REUSE)
+
+  2007-03-04 Frédéric Bernon
+  * api_msg.c: Remove some compiler warnings : parameter "pcb" was never
+    referenced.
+
+  2007-03-04 Frédéric Bernon
+  * api_lib.c: Fix "[patch #5764] api_lib.c cleanup: after patch #5687" (from
+    Dmitry Potapov).
+    The api_msg struct stay on the stack (not moved to netconn struct).
+
+  2007-03-04 Simon Goldschmidt (based on patch from Dmitry Potapov)
+  * pbuf.c: Fix BUG#19168 - pbuf_free can cause deadlock (if
+    SYS_LIGHTWEIGHT_PROT=1 & freeing PBUF_RAM when mem_sem is not available)
+    Also fixed cast warning in pbuf_alloc()
+
+  2007-03-04 Simon Goldschmidt
+  * etharp.c, etharp.h, memp.c, memp.h, opt.h: Fix BUG#11400 - don't corrupt
+    existing pbuf chain when enqueuing multiple pbufs to a pending ARP request
+
+  2007-03-03 Frédéric Bernon
+  * udp.c: remove obsolete line "static struct udp_pcb *pcb_cache = NULL;"
+    It is static, and never used in udp.c except udp_init().
+
+  2007-03-02 Simon Goldschmidt
+  * tcpip.c: Moved call to ip_init(), udp_init() and tcp_init() from
+    tcpip_thread() to tcpip_init(). This way, raw API connections can be
+    initialized before tcpip_thread is running (e.g. before OS is started)
+
+  2007-03-02 Frédéric Bernon
+  * rawapi.txt: Fix documentation mismatch with etharp.h about etharp_tmr's call
+    interval.
+
+  2007-02-28 Kieran Mansley 
+  * pbuf.c: Fix BUG#17645 - ensure pbuf payload pointer is not moved
+    outside the region of the pbuf by pbuf_header()
+
+  2007-02-28 Kieran Mansley 
+  * sockets.c: Fix BUG#19161 - ensure milliseconds timeout is non-zero
+    when supplied timeout is also non-zero 
+
+(STABLE-1.2.0)
+
+  2006-12-05 Leon Woestenberg
+  * CHANGELOG: Mention STABLE-1.2.0 release.
+
+  ++ New features:
+
+  2006-12-01 Christiaan Simons
+  * mem.h, opt.h: Added MEM_LIBC_MALLOC option.
+    Note this is a workaround. Currently I have no other options left.
+
+  2006-10-26 Christiaan Simons (accepted patch by Jonathan Larmour)
+  * ipv4/ip_frag.c: rename MAX_MTU to IP_FRAG_MAX_MTU and move define
+    to include/lwip/opt.h.
+  * ipv4/lwip/ip_frag.h: Remove unused IP_REASS_INTERVAL.
+    Move IP_REASS_MAXAGE and IP_REASS_BUFSIZE to include/lwip/opt.h.
+  * opt.h: Add above new options.
+
+  2006-08-18 Christiaan Simons
+  * tcp_{in,out}.c: added SNMP counters.
+  * ipv4/ip.c: added SNMP counters.
+  * ipv4/ip_frag.c: added SNMP counters.
+
+  2006-08-08 Christiaan Simons
+  * etharp.{c,h}: added etharp_find_addr() to read
+    (stable) ethernet/IP address pair from ARP table
+
+  2006-07-14 Christiaan Simons
+  * mib_structs.c: added
+  * include/lwip/snmp_structs.h: added
+  * netif.{c,h}, netif/ethernetif.c: added SNMP statistics to netif struct
+
+  2006-07-06 Christiaan Simons
+  * snmp/asn1_{enc,dec}.c added
+  * snmp/mib2.c added
+  * snmp/msg_{in,out}.c added
+  * include/lwip/snmp_asn1.h added
+  * include/lwip/snmp_msg.h added
+  * doc/snmp_agent.txt added
+
+  2006-03-29 Christiaan Simons
+  * inet.c, inet.h: Added platform byteswap support.
+    Added LWIP_PLATFORM_BYTESWAP define (defaults to 0) and
+    optional LWIP_PLATFORM_HTONS(), LWIP_PLATFORM_HTONL() macros.
+
+  ++ Bug fixes:
+
+  2006-11-30 Christiaan Simons
+  * dhcp.c: Fixed false triggers of request_timeout.
+
+  2006-11-28 Christiaan Simons
+  * netif.c: In netif_add() fixed missing clear of ip_addr, netmask, gw and flags.
+
+  2006-10-11 Christiaan Simons
+  * api_lib.c etharp.c, ip.c, memp.c, stats.c, sys.{c,h} tcp.h:
+    Partially accepted patch #5449 for ANSI C compatibility / build fixes.
+  * ipv4/lwip/ip.h ipv6/lwip/ip.h: Corrected UDP-Lite protocol
+    identifier from 170 to 136 (bug #17574).
+
+  2006-10-10 Christiaan Simons
+  * api_msg.c: Fixed Nagle algorithm as reported by Bob Grice.
+
+  2006-08-17 Christiaan Simons
+  * udp.c: Fixed bug #17200, added check for broadcast
+    destinations for PCBs bound to a unicast address.
+
+  2006-08-07 Christiaan Simons
+  * api_msg.c: Flushing TCP output in do_close() (bug #15926).
+
+  2006-06-27 Christiaan Simons
+  * api_msg.c: Applied patch for cold case (bug #11135).
+    In accept_function() ensure newconn->callback is always initialized.
+
+  2006-06-15 Christiaan Simons
+  * mem.h: added MEM_SIZE_F alias to fix an ancient cold case (bug #1748),
+    facilitate printing of mem_size_t and u16_t statistics.
+
+  2006-06-14 Christiaan Simons
+  * api_msg.c: Applied patch #5146 to handle allocation failures
+    in accept() by Kevin Lawson.
+
+  2006-05-26 Christiaan Simons
+  * api_lib.c: Removed conn->sem creation and destruction 
+    from netconn_write() and added sys_sem_new to netconn_new_*.
+
+(STABLE-1_1_1)
+
+  2006-03-03  Christiaan Simons
+  * ipv4/ip_frag.c: Added bound-checking assertions on ip_reassbitmap
+    access and added pbuf_alloc() return value checks.
+
+  2006-01-01  Leon Woestenberg <leon.woestenberg@gmx.net>
+  * tcp_{in,out}.c, tcp_out.c: Removed 'even sndbuf' fix in TCP, which is
+    now handled by the checksum routine properly.
+
+  2006-02-27  Leon Woestenberg <leon.woestenberg@gmx.net>
+   * pbuf.c: Fix alignment; pbuf_init() would not work unless
+     pbuf_pool_memory[] was properly aligned. (Patch by Curt McDowell.)
+
+  2005-12-20  Leon Woestenberg <leon.woestenberg@gmx.net>
+  * tcp.c: Remove PCBs which stay in LAST_ACK state too long. Patch
+    submitted by Mitrani Hiroshi.
+
+  2005-12-15  Christiaan Simons
+  * inet.c: Disabled the added summing routine to preserve code space.
+
+  2005-12-14  Leon Woestenberg <leon.woestenberg@gmx.net>
+  * tcp_in.c: Duplicate FIN ACK race condition fix by Kelvin Lawson.
+    Added Curt McDowell's optimized checksumming routine for future
+    inclusion. Need to create test case for unaliged, aligned, odd,
+    even length combination of cases on various endianess machines.
+
+  2005-12-09  Christiaan Simons
+  * inet.c: Rewrote standard checksum routine in proper portable C.
+
+  2005-11-25  Christiaan Simons
+  * udp.c tcp.c: Removed SO_REUSE hack. Should reside in socket code only.
+  * *.c: introduced cc.h LWIP_DEBUG formatters matching the u16_t, s16_t,
+    u32_t, s32_t typedefs. This solves most debug word-length assumes.
+
+  2005-07-17 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * inet.c: Fixed unaligned 16-bit access in the standard checksum
+    routine by Peter Jolasson.
+  * slipif.c: Fixed implementation assumption of single-pbuf datagrams.
+
+  2005-02-04 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * tcp_out.c: Fixed uninitialized 'queue' referenced in memerr branch.
+  * tcp_{out|in}.c: Applied patch fixing unaligned access.
+
+  2005-01-04 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * pbuf.c: Fixed missing semicolon after LWIP_DEBUG statement.
+
+  2005-01-03 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * udp.c: UDP pcb->recv() was called even when it was NULL.
+
+(STABLE-1_1_0)
+
+  2004-12-28 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * etharp.*: Disabled multiple packets on the ARP queue.
+    This clashes with TCP queueing.
+
+  2004-11-28 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * etharp.*: Fixed race condition from ARP request to ARP timeout.
+    Halved the ARP period, doubled the period counts.
+    ETHARP_MAX_PENDING now should be at least 2. This prevents
+    the counter from reaching 0 right away (which would allow
+    too little time for ARP responses to be received).
+
+  2004-11-25 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * dhcp.c: Decline messages were not multicast but unicast.
+  * etharp.c: ETHARP_CREATE is renamed to ETHARP_TRY_HARD.
+    Do not try hard to insert arbitrary packet's source address,
+    etharp_ip_input() now calls etharp_update() without ETHARP_TRY_HARD. 
+    etharp_query() now always DOES call ETHARP_TRY_HARD so that users
+    querying an address will see it appear in the cache (DHCP could
+    suffer from this when a server invalidly gave an in-use address.)
+  * ipv4/ip_addr.h: Renamed ip_addr_maskcmp() to _netcmp() as we are
+    comparing network addresses (identifiers), not the network masks
+    themselves.
+  * ipv4/ip_addr.c: ip_addr_isbroadcast() now checks that the given
+    IP address actually belongs to the network of the given interface.
+
+  2004-11-24 Kieran Mansley <kjm25@cam.ac.uk>
+  * tcp.c: Increment pcb->snd_buf when ACK is received in SYN_SENT state.
+
+(STABLE-1_1_0-RC1)
+
+  2004-10-16 Kieran Mansley <kjm25@cam.ac.uk>
+  * tcp.c: Add code to tcp_recved() to send an ACK (window update) immediately,
+    even if one is already pending, if the rcv_wnd is above a threshold
+    (currently TCP_WND/2). This avoids waiting for a timer to expire to send a
+    delayed ACK in order to open the window if the stack is only receiving data.
+
+  2004-09-12 Kieran Mansley <kjm25@cam.ac.uk>
+  * tcp*.*: Retransmit time-out handling improvement by Sam Jansen.
+
+  2004-08-20 Tony Mountifield <tony@softins.co.uk>
+  * etharp.c: Make sure the first pbuf queued on an ARP entry
+    is properly ref counted.
+
+  2004-07-27 Tony Mountifield <tony@softins.co.uk>
+  * debug.h: Added (int) cast in LWIP_DEBUGF() to avoid compiler
+    warnings about comparison.
+  * pbuf.c: Stopped compiler complaining of empty if statement
+    when LWIP_DEBUGF() empty.  Closed an unclosed comment.
+  * tcp.c: Stopped compiler complaining of empty if statement
+    when LWIP_DEBUGF() empty.
+  * ip.h Corrected IPH_TOS() macro: returns a byte, so doesn't need htons().
+  * inet.c: Added a couple of casts to quiet the compiler.
+    No need to test isascii(c) before isdigit(c) or isxdigit(c).
+
+  2004-07-22 Tony Mountifield <tony@softins.co.uk>
+  * inet.c: Made data types consistent in inet_ntoa().
+    Added casts for return values of checksum routines, to pacify compiler.
+  * ip_frag.c, tcp_out.c, sockets.c, pbuf.c
+    Small corrections to some debugging statements, to pacify compiler.
+
+  2004-07-21 Tony Mountifield <tony@softins.co.uk>
+  * etharp.c: Removed spurious semicolon and added missing end-of-comment.
+  * ethernetif.c Updated low_level_output() to match prototype for
+    netif->linkoutput and changed low_level_input() similarly for consistency.
+  * api_msg.c: Changed recv_raw() from int to u8_t, to match prototype
+    of raw_recv() in raw.h and so avoid compiler error.
+  * sockets.c: Added trivial (int) cast to keep compiler happier.
+  * ip.c, netif.c Changed debug statements to use the tidier ip4_addrN() macros.
+
+(STABLE-1_0_0)
+
+  ++ Changes:
+
+  2004-07-05 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * sockets.*: Restructured LWIP_PRIVATE_TIMEVAL. Make sure
+    your cc.h file defines this either 1 or 0. If non-defined,
+    defaults to 1.
+  * .c: Added <string.h> and <errno.h> includes where used.
+  * etharp.c: Made some array indices unsigned.
+
+  2004-06-27 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * netif.*: Added netif_set_up()/down().
+  * dhcp.c: Changes to restart program flow.
+
+  2004-05-07 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * etharp.c: In find_entry(), instead of a list traversal per candidate, do a
+    single-pass lookup for different candidates. Should exploit locality.
+
+  2004-04-29 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * tcp*.c: Cleaned up source comment documentation for Doxygen processing.
+  * opt.h: ETHARP_ALWAYS_INSERT option removed to comply with ARP RFC.
+  * etharp.c: update_arp_entry() only adds new ARP entries when adviced to by
+    the caller. This deprecates the ETHARP_ALWAYS_INSERT overrule option.
+
+  ++ Bug fixes:
+
+  2004-04-27 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * etharp.c: Applied patch of bug #8708 by Toni Mountifield with a solution
+    suggested by Timmy Brolin. Fix for 32-bit processors that cannot access
+    non-aligned 32-bit words, such as soms 32-bit TCP/IP header fields. Fix
+    is to prefix the 14-bit Ethernet headers with two padding bytes.
+
+  2004-04-23 Leon Woestenberg <leon.woestenberg@gmx.net>
+  * ip_addr.c: Fix in the ip_addr_isbroadcast() check.
+  * etharp.c: Fixed the case where the packet that initiates the ARP request
+    is not queued, and gets lost. Fixed the case where the packets destination
+    address is already known; we now always queue the packet and perform an ARP
+    request.
+
+(STABLE-0_7_0)
+
+  ++ Bug fixes:
+
+  * Fixed TCP bug for SYN_SENT to ESTABLISHED state transition.
+  * Fixed TCP bug in dequeueing of FIN from out of order segment queue.
+  * Fixed two possible NULL references in rare cases.
+
+(STABLE-0_6_6)
+
+  ++ Bug fixes:
+
+  * Fixed DHCP which did not include the IP address in DECLINE messages.
+
+  ++ Changes:
+
+  * etharp.c has been hauled over a bit.
+
+(STABLE-0_6_5)
+
+  ++ Bug fixes:
+
+  * Fixed TCP bug induced by bad window resizing with unidirectional TCP traffic.
+  * Packets sent from ARP queue had invalid source hardware address.
+
+  ++ Changes:
+
+  * Pass-by ARP requests do now update the cache.
+
+  ++ New features:
+
+  * No longer dependent on ctype.h.
+  * New socket options.
+  * Raw IP pcb support.
+
+(STABLE-0_6_4)
+
+  ++ Bug fixes:
+
+  * Some debug formatters and casts fixed.
+  * Numereous fixes in PPP.
+
+  ++ Changes:
+
+  * DEBUGF now is LWIP_DEBUGF
+  * pbuf_dechain() has been re-enabled.
+  * Mentioned the changed use of CVS branches in README.
+
+(STABLE-0_6_3)
+
+  ++ Bug fixes:
+
+  * Fixed pool pbuf memory leak in pbuf_alloc().
+    Occured if not enough PBUF_POOL pbufs for a packet pbuf chain.
+    Reported by Savin Zlobec.
+
+  * PBUF_POOL chains had their tot_len field not set for non-first
+    pbufs. Fixed in pbuf_alloc().
+
+  ++ New features:
+
+  * Added PPP stack contributed by Marc Boucher
+
+  ++ Changes:
+
+  * Now drops short packets for ICMP/UDP/TCP protocols. More robust.
+
+  * ARP queueuing now queues the latest packet instead of the first.
+    This is the RFC recommended behaviour, but can be overridden in
+    lwipopts.h.
+
+(0.6.2)
+
+  ++ Bugfixes:
+
+  * TCP has been fixed to deal with the new use of the pbuf->ref
+    counter.
+
+  * DHCP dhcp_inform() crash bug fixed.
+
+  ++ Changes:
+
+  * Removed pbuf_pool_free_cache and pbuf_pool_alloc_cache. Also removed
+    pbuf_refresh(). This has sped up pbuf pool operations considerably.
+    Implemented by David Haas.
+
+(0.6.1)
+
+  ++ New features:
+
+  * The packet buffer implementation has been enhanced to support
+    zero-copy and copy-on-demand for packet buffers which have their
+    payloads in application-managed memory.
+    Implemented by David Haas.
+
+    Use PBUF_REF to make a pbuf refer to RAM. lwIP will use zero-copy
+    if an outgoing packet can be directly sent on the link, or perform
+    a copy-on-demand when necessary.
+
+    The application can safely assume the packet is sent, and the RAM
+    is available to the application directly after calling udp_send()
+    or similar function.
+
+  ++ Bugfixes:
+
+  * ARP_QUEUEING should now correctly work for all cases, including
+    PBUF_REF.
+    Implemented by Leon Woestenberg.
+
+  ++ Changes:
+
+  * IP_ADDR_ANY is no longer a NULL pointer. Instead, it is a pointer
+    to a '0.0.0.0' IP address.
+
+  * The packet buffer implementation is changed. The pbuf->ref counter
+    meaning has changed, and several pbuf functions have been
+    adapted accordingly.
+
+  * netif drivers have to be changed to set the hardware address length field
+    that must be initialized correctly by the driver (hint: 6 for Ethernet MAC).
+    See the contrib/ports/c16x cs8900 driver as a driver example.
+
+  * netif's have a dhcp field that must be initialized to NULL by the driver.
+    See the contrib/ports/c16x cs8900 driver as a driver example.
+
+(0.5.x) This file has been unmaintained up to 0.6.1. All changes are
+  logged in CVS but have not been explained here.
+
+(0.5.3) Changes since version 0.5.2
+
+  ++ Bugfixes:
+
+  * memp_malloc(MEMP_API_MSG) could fail with multiple application
+    threads because it wasn't protected by semaphores.
+
+  ++ Other changes:
+
+  * struct ip_addr now packed.
+
+  * The name of the time variable in arp.c has been changed to ctime
+    to avoid conflicts with the time() function.
+
+(0.5.2) Changes since version 0.5.1
+
+  ++ New features:
+
+  * A new TCP function, tcp_tmr(), now handles both TCP timers.
+
+  ++ Bugfixes:
+
+  * A bug in tcp_parseopt() could cause the stack to hang because of a
+    malformed TCP option.
+
+  * The address of new connections in the accept() function in the BSD
+    socket library was not handled correctly.
+
+  * pbuf_dechain() did not update the ->tot_len field of the tail.
+
+  * Aborted TCP connections were not handled correctly in all
+    situations.
+
+  ++ Other changes:
+
+  * All protocol header structs are now packed.
+
+  * The ->len field in the tcp_seg structure now counts the actual
+    amount of data, and does not add one for SYN and FIN segments.
+
+(0.5.1) Changes since version 0.5.0
+
+  ++ New features:
+
+  * Possible to run as a user process under Linux.
+
+  * Preliminary support for cross platform packed structs.
+
+  * ARP timer now implemented.
+
+  ++ Bugfixes:
+
+  * TCP output queue length was badly initialized when opening
+    connections.
+
+  * TCP delayed ACKs were not sent correctly.
+
+  * Explicit initialization of BSS segment variables.
+
+  * read() in BSD socket library could drop data.
+
+  * Problems with memory alignment.
+
+  * Situations when all TCP buffers were used could lead to
+    starvation.
+
+  * TCP MSS option wasn't parsed correctly.
+
+  * Problems with UDP checksum calculation.
+
+  * IP multicast address tests had endianess problems.
+
+  * ARP requests had wrong destination hardware address.
+
+  ++ Other changes:
+
+  * struct eth_addr changed from u16_t[3] array to u8_t[6].
+
+  * A ->linkoutput() member was added to struct netif.
+
+  * TCP and UDP ->dest_* struct members where changed to ->remote_*.
+
+  * ntoh* macros are now null definitions for big endian CPUs.
+
+(0.5.0) Changes since version 0.4.2
+
+  ++ New features:
+
+  * Redesigned operating system emulation layer to make porting easier.
+
+  * Better control over TCP output buffers.
+
+  * Documenation added.
+
+  ++ Bugfixes:
+
+  * Locking issues in buffer management.
+
+  * Bugfixes in the sequential API.
+
+  * IP forwarding could cause memory leakage. This has been fixed.
+
+  ++ Other changes:
+
+  * Directory structure somewhat changed; the core/ tree has been
+    collapsed.
+
+(0.4.2) Changes since version 0.4.1
+
+  ++ New features:
+
+  * Experimental ARP implementation added.
+
+  * Skeleton Ethernet driver added.
+
+  * Experimental BSD socket API library added.
+
+  ++ Bugfixes:
+
+  * In very intense situations, memory leakage could occur. This has
+    been fixed.
+
+  ++ Other changes:
+
+  * Variables named "data" and "code" have been renamed in order to
+    avoid name conflicts in certain compilers.
+
+  * Variable++ have in appliciable cases been translated to ++variable
+    since some compilers generate better code in the latter case.
+
+(0.4.1) Changes since version 0.4
+
+  ++ New features:
+
+  * TCP: Connection attempts time out earlier than data
+    transmissions. Nagle algorithm implemented. Push flag set on the
+    last segment in a burst.
+
+  * UDP: experimental support for UDP-Lite extensions.
+
+  ++ Bugfixes:
+
+  * TCP: out of order segments were in some cases handled incorrectly,
+    and this has now been fixed. Delayed acknowledgements was broken
+    in 0.4, has now been fixed. Binding to an address that is in use
+    now results in an error. Reset connections sometimes hung an
+    application; this has been fixed.
+
+  * Checksum calculation sometimes failed for chained pbufs with odd
+    lengths. This has been fixed.
+
+  * API: a lot of bug fixes in the API. The UDP API has been improved
+    and tested. Error reporting and handling has been
+    improved. Logical flaws and race conditions for incoming TCP
+    connections has been found and removed.
+
+  * Memory manager: alignment issues. Reallocating memory sometimes
+    failed, this has been fixed.
+
+  * Generic library: bcopy was flawed and has been fixed.
+
+  ++ Other changes:
+
+  * API: all datatypes has been changed from generic ones such as
+    ints, to specified ones such as u16_t. Functions that return
+    errors now have the correct type (err_t).
+
+  * General: A lot of code cleaned up and debugging code removed. Many
+    portability issues have been fixed.
+
+  * The license was changed; the advertising clause was removed.
+
+  * C64 port added.
+
+  * Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri
+    Kosunen, Mikael Caleres, and Frits Wilmink for reporting and
+    fixing bugs!
+
+(0.4) Changes since version 0.3.1
+
+  * Memory management has been radically changed; instead of
+    allocating memory from a shared heap, memory for objects that are
+    rapidly allocated and deallocated is now kept in pools. Allocation
+    and deallocation from those memory pools is very fast. The shared
+    heap is still present but is used less frequently.
+
+  * The memory, memory pool, and packet buffer subsystems now support
+    4-, 2-, or 1-byte alignment.
+
+  * "Out of memory" situations are handled in a more robust way.
+
+  * Stack usage has been reduced.
+
+  * Easier configuration of lwIP parameters such as memory usage,
+    TTLs, statistics gathering, etc. All configuration parameters are
+    now kept in a single header file "lwipopts.h".
+
+  * The directory structure has been changed slightly so that all
+    architecture specific files are kept under the src/arch
+    hierarchy.
+
+  * Error propagation has been improved, both in the protocol modules
+    and in the API.
+
+  * The code for the RTXC architecture has been implemented, tested
+    and put to use.
+
+  * Bugs have been found and corrected in the TCP, UDP, IP, API, and
+    the Internet checksum modules.
+
+  * Bugs related to porting between a 32-bit and a 16-bit architecture
+    have been found and corrected.
+
+  * The license has been changed slightly to conform more with the
+    original BSD license, including the advertisement clause.
+
+(0.3.1) Changes since version 0.3
+
+  * Fix of a fatal bug in the buffer management. Pbufs with allocated
+    RAM never returned the RAM when the pbuf was deallocated.
+
+  * TCP congestion control, window updates and retransmissions did not
+    work correctly. This has now been fixed.
+
+  * Bugfixes in the API.
+
+(0.3) Changes since version 0.2
+
+  * New and improved directory structure. All include files are now
+    kept in a dedicated include/ directory.
+
+  * The API now has proper error handling. A new function,
+    netconn_err(), now returns an error code for the connection in
+    case of errors.
+
+  * Improvements in the memory management subsystem. The system now
+    keeps a pointer to the lowest free memory block. A new function,
+    mem_malloc2() tries to allocate memory once, and if it fails tries
+    to free some memory and retry the allocation.
+
+  * Much testing has been done with limited memory
+    configurations. lwIP now does a better job when overloaded.
+
+  * Some bugfixes and improvements to the buffer (pbuf) subsystem.
+
+  * Many bugfixes in the TCP code:
+
+    - Fixed a bug in tcp_close().
+
+    - The TCP receive window was incorrectly closed when out of
+      sequence segments was received. This has been fixed.
+
+    - Connections are now timed-out of the FIN-WAIT-2 state.
+
+    - The initial congestion window could in some cases be too
+      large. This has been fixed.
+
+    - The retransmission queue could in some cases be screwed up. This
+      has been fixed.
+
+    - TCP RST flag now handled correctly.
+
+    - Out of sequence data was in some cases never delivered to the
+      application. This has been fixed.
+
+    - Retransmitted segments now contain the correct acknowledgment
+      number and advertised window.
+
+    - TCP retransmission timeout backoffs are not correctly computed
+      (ala BSD). After a number of retransmissions, TCP now gives up
+      the connection.
+
+  * TCP connections now are kept on three lists, one for active
+    connections, one for listening connections, and one for
+    connections that are in TIME-WAIT. This greatly speeds up the fast
+    timeout processing for sending delayed ACKs.
+
+  * TCP now provides proper feedback to the application when a
+    connection has been successfully set up.
+
+  * More comments have been added to the code. The code has also been
+    somewhat cleaned up.
+
+(0.2) Initial public release.
diff --git a/firmware/x300/lwip/lwip-1.3.1/COPYING b/firmware/x300/lwip/lwip-1.3.1/COPYING
new file mode 100644
index 000000000..e23898b5e
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/COPYING
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/FILES b/firmware/x300/lwip/lwip-1.3.1/FILES
new file mode 100644
index 000000000..66253196f
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/FILES
@@ -0,0 +1,4 @@
+src/      - The source code for the lwIP TCP/IP stack.
+doc/      - The documentation for lwIP.
+
+See also the FILES file in each subdirectory.
diff --git a/firmware/x300/lwip/lwip-1.3.1/README b/firmware/x300/lwip/lwip-1.3.1/README
new file mode 100644
index 000000000..8dda4b468
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/README
@@ -0,0 +1,89 @@
+INTRODUCTION
+
+lwIP is a small independent implementation of the TCP/IP protocol
+suite that has been developed by Adam Dunkels at the Computer and
+Networks Architectures (CNA) lab at the Swedish Institute of Computer
+Science (SICS).
+
+The focus of the lwIP TCP/IP implementation is to reduce the RAM usage
+while still having a full scale TCP. This making lwIP suitable for use
+in embedded systems with tens of kilobytes of free RAM and room for
+around 40 kilobytes of code ROM.
+
+FEATURES
+
+  * IP (Internet Protocol) including packet forwarding over multiple network
+    interfaces
+  * ICMP (Internet Control Message Protocol) for network maintenance and debugging
+  * IGMP (Internet Group Management Protocol) for multicast traffic management
+  * UDP (User Datagram Protocol) including experimental UDP-lite extensions
+  * TCP (Transmission Control Protocol) with congestion control, RTT estimation
+    and fast recovery/fast retransmit
+  * Specialized raw/native API for enhanced performance
+  * Optional Berkeley-like socket API
+  * DNS (Domain names resolver)
+  * SNMP (Simple Network Management Protocol)
+  * DHCP (Dynamic Host Configuration Protocol)
+  * AUTOIP (for IPv4, conform with RFC 3927)
+  * PPP (Point-to-Point Protocol)
+  * ARP (Address Resolution Protocol) for Ethernet
+
+LICENSE
+
+lwIP is freely available under a BSD license.
+
+DEVELOPMENT
+
+lwIP has grown into an excellent TCP/IP stack for embedded devices,
+and developers using the stack often submit bug fixes, improvements,
+and additions to the stack to further increase its usefulness.
+
+Development of lwIP is hosted on Savannah, a central point for
+software development, maintenance and distribution. Everyone can
+help improve lwIP by use of Savannah's interface, CVS and the
+mailing list. A core team of developers will commit changes to the
+CVS source tree.
+
+The lwIP TCP/IP stack is maintained in the 'lwip' CVS module and
+contributions (such as platform ports) are in the 'contrib' module.
+
+See doc/savannah.txt for details on CVS server access for users and
+developers.
+
+Last night's CVS tar ball can be downloaded from:
+  http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING]
+
+The current CVS trees are web-browsable:
+  http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/
+  http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/contrib/
+
+Submit patches and bugs via the lwIP project page:
+  http://savannah.nongnu.org/projects/lwip/
+
+
+DOCUMENTATION
+
+The original out-dated homepage of lwIP and Adam Dunkels' papers on
+lwIP are at the official lwIP home page:
+  http://www.sics.se/~adam/lwip/
+
+Self documentation of the source code is regularly extracted from the
+current CVS sources and is available from this web page:
+  http://www.nongnu.org/lwip/
+
+There is now a constantly growin wiki about lwIP at
+  http://lwip.scribblewiki.com/
+
+Also, there are mailing lists you can subscribe at
+  http://savannah.nongnu.org/mail/?group=lwip
+plus searchable archives:
+  http://lists.nongnu.org/archive/html/lwip-users/
+  http://lists.nongnu.org/archive/html/lwip-devel/
+
+Reading Adam's papers, the files in docs/, browsing the source code
+documentation and browsing the mailing list archives is a good way to
+become familiar with the design of lwIP.
+
+Adam Dunkels <adam@sics.se>
+Leon Woestenberg <leon.woestenberg@gmx.net>
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/doc/FILES b/firmware/x300/lwip/lwip-1.3.1/doc/FILES
new file mode 100644
index 000000000..05d356f4f
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/doc/FILES
@@ -0,0 +1,6 @@
+savannah.txt   - How to obtain the current development source code.
+contrib.txt    - How to contribute to lwIP as a developer.
+rawapi.txt     - The documentation for the core API of lwIP.
+                 Also provides an overview about the other APIs and multithreading.
+snmp_agent.txt - The documentation for the lwIP SNMP agent.
+sys_arch.txt   - The documentation for a system abstraction layer of lwIP.
diff --git a/firmware/x300/lwip/lwip-1.3.1/doc/contrib.txt b/firmware/x300/lwip/lwip-1.3.1/doc/contrib.txt
new file mode 100644
index 000000000..39596fca3
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/doc/contrib.txt
@@ -0,0 +1,63 @@
+1 Introduction
+
+This document describes some guidelines for people participating
+in lwIP development.
+
+2 How to contribute to lwIP
+
+Here is a short list of suggestions to anybody working with lwIP and 
+trying to contribute bug reports, fixes, enhancements, platform ports etc.
+First of all as you may already know lwIP is a volunteer project so feedback
+to fixes or questions might often come late. Hopefully the bug and patch tracking 
+features of Savannah help us not lose users' input.
+
+2.1 Source code style:
+
+1. do not use tabs.
+2. indentation is two spaces per level (i.e. per tab).
+3. end debug messages with a trailing newline (\n).
+4. one space between keyword and opening bracket.
+5. no space between function and opening bracket.
+6. one space and no newline before opening curly braces of a block.
+7. closing curly brace on a single line.
+8. spaces surrounding assignment and comparisons.
+9. don't initialize static and/or global variables to zero, the compiler takes care of that.
+10. use current source code style as further reference.
+
+2.2 Source code documentation style:
+
+1. JavaDoc compliant and Doxygen compatible.
+2. Function documentation above functions in .c files, not .h files.
+   (This forces you to synchronize documentation and implementation.)
+3. Use current documentation style as further reference.
+ 
+2.3 Bug reports and patches:
+
+1. Make sure you are reporting bugs or send patches against the latest
+   sources. (From the latest release and/or the current CVS sources.)
+2. If you think you found a bug make sure it's not already filed in the
+   bugtracker at Savannah.
+3. If you have a fix put the patch on Savannah. If it is a patch that affects
+   both core and arch specific stuff please separate them so that the core can
+   be applied separately while leaving the other patch 'open'. The prefered way
+   is to NOT touch archs you can't test and let maintainers take care of them.
+   This is a good way to see if they are used at all - the same goes for unix
+   netifs except tapif.
+4. Do not file a bug and post a fix to it to the patch area. Either a bug report
+   or a patch will be enough.
+   If you correct an existing bug then attach the patch to the bug rather than creating a new entry in the patch area.
+5. Trivial patches (compiler warning, indentation and spelling fixes or anything obvious which takes a line or two)
+   can go to the lwip-users list. This is still the fastest way of interaction and the list is not so crowded
+   as to allow for loss of fixes. Putting bugs on Savannah and subsequently closing them is too much an overhead
+   for reporting a compiler warning fix.
+6. Patches should be specific to a single change or to related changes.Do not mix bugfixes with spelling and other
+   trivial fixes unless the bugfix is trivial too.Do not reorganize code and rename identifiers in the same patch you
+   change behaviour if not necessary.A patch is easier to read and understand if it's to the point and short than
+   if it's not to the point and long :) so the chances for it to be applied are greater. 
+
+2.4 Platform porters:
+
+1. If you have ported lwIP to a platform (an OS, a uC/processor or a combination of these) and
+   you think it could benefit others[1] you might want discuss this on the mailing list. You
+   can also ask for CVS access to submit and maintain your port in the contrib CVS module.
+   
\ No newline at end of file
diff --git a/firmware/x300/lwip/lwip-1.3.1/doc/rawapi.txt b/firmware/x300/lwip/lwip-1.3.1/doc/rawapi.txt
new file mode 100644
index 000000000..8eec6e786
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/doc/rawapi.txt
@@ -0,0 +1,478 @@
+Raw TCP/IP interface for lwIP
+
+Authors: Adam Dunkels, Leon Woestenberg, Christiaan Simons
+
+lwIP provides three Application Program's Interfaces (APIs) for programs
+to use for communication with the TCP/IP code:
+* low-level "core" / "callback" or "raw" API.
+* higher-level "sequential" API.
+* BSD-style socket API.
+
+The sequential API provides a way for ordinary, sequential, programs
+to use the lwIP stack. It is quite similar to the BSD socket API. The
+model of execution is based on the blocking open-read-write-close
+paradigm. Since the TCP/IP stack is event based by nature, the TCP/IP
+code and the application program must reside in different execution
+contexts (threads).
+
+The socket API is a compatibility API for existing applications,
+currently it is built on top of the sequential API. It is meant to
+provide all functions needed to run socket API applications running
+on other platforms (e.g. unix / windows etc.). However, due to limitations
+in the specification of this API, there might be incompatibilities
+that require small modifications of existing programs.
+
+** Threading
+
+lwIP started targeting single-threaded environments. When adding multi-
+threading support, instead of making the core thread-safe, another
+approach was chosen: there is one main thread running the lwIP core
+(also known as the "tcpip_thread"). The raw API may only be used from
+this thread! Application threads using the sequential- or socket API
+communicate with this main thread through message passing.
+
+      As such, the list of functions that may be called from
+      other threads or an ISR is very limited! Only functions
+      from these API header files are thread-safe:
+      - api.h
+      - netbuf.h
+      - netdb.h
+      - netifapi.h
+      - sockets.h
+      - sys.h
+
+      Additionaly, memory (de-)allocation functions may be
+      called from multiple threads (not ISR!) with NO_SYS=0
+      since they are protected by SYS_LIGHTWEIGHT_PROT and/or
+      semaphores.
+
+      Only since 1.3.0, if SYS_LIGHTWEIGHT_PROT is set to 1
+      and LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT is set to 1,
+      pbuf_free() may also be called from another thread or
+      an ISR (since only then, mem_free - for PBUF_RAM - may
+      be called from an ISR: otherwise, the HEAP is only
+      protected by semaphores).
+      
+
+** The remainder of this document discusses the "raw" API. **
+
+The raw TCP/IP interface allows the application program to integrate
+better with the TCP/IP code. Program execution is event based by
+having callback functions being called from within the TCP/IP
+code. The TCP/IP code and the application program both run in the same
+thread. The sequential API has a much higher overhead and is not very
+well suited for small systems since it forces a multithreaded paradigm
+on the application.
+
+The raw TCP/IP interface is not only faster in terms of code execution
+time but is also less memory intensive. The drawback is that program
+development is somewhat harder and application programs written for
+the raw TCP/IP interface are more difficult to understand. Still, this
+is the preferred way of writing applications that should be small in
+code size and memory usage.
+
+Both APIs can be used simultaneously by different application
+programs. In fact, the sequential API is implemented as an application
+program using the raw TCP/IP interface.
+
+--- Callbacks
+
+Program execution is driven by callbacks. Each callback is an ordinary
+C function that is called from within the TCP/IP code. Every callback
+function is passed the current TCP or UDP connection state as an
+argument. Also, in order to be able to keep program specific state,
+the callback functions are called with a program specified argument
+that is independent of the TCP/IP state.
+
+The function for setting the application connection state is:
+
+- void tcp_arg(struct tcp_pcb *pcb, void *arg)
+
+  Specifies the program specific state that should be passed to all
+  other callback functions. The "pcb" argument is the current TCP
+  connection control block, and the "arg" argument is the argument
+  that will be passed to the callbacks.
+
+  
+--- TCP connection setup
+
+The functions used for setting up connections is similar to that of
+the sequential API and of the BSD socket API. A new TCP connection
+identifier (i.e., a protocol control block - PCB) is created with the
+tcp_new() function. This PCB can then be either set to listen for new
+incoming connections or be explicitly connected to another host.
+
+- struct tcp_pcb *tcp_new(void)
+
+  Creates a new connection identifier (PCB). If memory is not
+  available for creating the new pcb, NULL is returned.
+
+- err_t tcp_bind(struct tcp_pcb *pcb, struct ip_addr *ipaddr,
+                 u16_t port)
+
+  Binds the pcb to a local IP address and port number. The IP address
+  can be specified as IP_ADDR_ANY in order to bind the connection to
+  all local IP addresses.
+
+  If another connection is bound to the same port, the function will
+  return ERR_USE, otherwise ERR_OK is returned.
+
+- struct tcp_pcb *tcp_listen(struct tcp_pcb *pcb)
+
+  Commands a pcb to start listening for incoming connections. When an
+  incoming connection is accepted, the function specified with the
+  tcp_accept() function will be called. The pcb will have to be bound
+  to a local port with the tcp_bind() function.
+
+  The tcp_listen() function returns a new connection identifier, and
+  the one passed as an argument to the function will be
+  deallocated. The reason for this behavior is that less memory is
+  needed for a connection that is listening, so tcp_listen() will
+  reclaim the memory needed for the original connection and allocate a
+  new smaller memory block for the listening connection.
+
+  tcp_listen() may return NULL if no memory was available for the
+  listening connection. If so, the memory associated with the pcb
+  passed as an argument to tcp_listen() will not be deallocated.
+
+- struct tcp_pcb *tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog)
+
+  Same as tcp_listen, but limits the number of outstanding connections
+  in the listen queue to the value specified by the backlog argument.
+  To use it, your need to set TCP_LISTEN_BACKLOG=1 in your lwipopts.h.
+
+- void tcp_accepted(struct tcp_pcb *pcb)
+
+  Inform lwIP that an incoming connection has been accepted. This would
+  usually be called from the accept callback. This allows lwIP to perform
+  housekeeping tasks, such as allowing further incoming connections to be
+  queued in the listen backlog.
+
+- void tcp_accept(struct tcp_pcb *pcb,
+                  err_t (* accept)(void *arg, struct tcp_pcb *newpcb,
+                                   err_t err))
+
+  Specified the callback function that should be called when a new
+  connection arrives on a listening connection.
+      
+- err_t tcp_connect(struct tcp_pcb *pcb, struct ip_addr *ipaddr,
+                    u16_t port, err_t (* connected)(void *arg,
+                                                    struct tcp_pcb *tpcb,
+                                                    err_t err));
+
+  Sets up the pcb to connect to the remote host and sends the
+  initial SYN segment which opens the connection. 
+
+  The tcp_connect() function returns immediately; it does not wait for
+  the connection to be properly setup. Instead, it will call the
+  function specified as the fourth argument (the "connected" argument)
+  when the connection is established. If the connection could not be
+  properly established, either because the other host refused the
+  connection or because the other host didn't answer, the "err"
+  callback function of this pcb (registered with tcp_err, see below)
+  will be called.
+
+  The tcp_connect() function can return ERR_MEM if no memory is
+  available for enqueueing the SYN segment. If the SYN indeed was
+  enqueued successfully, the tcp_connect() function returns ERR_OK.
+
+  
+--- Sending TCP data
+
+TCP data is sent by enqueueing the data with a call to
+tcp_write(). When the data is successfully transmitted to the remote
+host, the application will be notified with a call to a specified
+callback function.
+
+- err_t tcp_write(struct tcp_pcb *pcb, void *dataptr, u16_t len,
+                  u8_t copy)
+
+  Enqueues the data pointed to by the argument dataptr. The length of
+  the data is passed as the len parameter. The copy argument is either
+  0 or 1 and indicates whether the new memory should be allocated for
+  the data to be copied into. If the argument is 0, no new memory
+  should be allocated and the data should only be referenced by
+  pointer.
+
+  The tcp_write() function will fail and return ERR_MEM if the length
+  of the data exceeds the current send buffer size or if the length of
+  the queue of outgoing segment is larger than the upper limit defined
+  in lwipopts.h. The number of bytes available in the output queue can
+  be retrieved with the tcp_sndbuf() function.
+
+  The proper way to use this function is to call the function with at
+  most tcp_sndbuf() bytes of data. If the function returns ERR_MEM,
+  the application should wait until some of the currently enqueued
+  data has been successfully received by the other host and try again.
+
+- void tcp_sent(struct tcp_pcb *pcb,
+                err_t (* sent)(void *arg, struct tcp_pcb *tpcb,
+                u16_t len))
+
+  Specifies the callback function that should be called when data has
+  successfully been received (i.e., acknowledged) by the remote
+  host. The len argument passed to the callback function gives the
+  amount bytes that was acknowledged by the last acknowledgment.
+
+  
+--- Receiving TCP data
+
+TCP data reception is callback based - an application specified
+callback function is called when new data arrives. When the
+application has taken the data, it has to call the tcp_recved()
+function to indicate that TCP can advertise increase the receive
+window.
+
+- void tcp_recv(struct tcp_pcb *pcb,
+                err_t (* recv)(void *arg, struct tcp_pcb *tpcb,
+                               struct pbuf *p, err_t err))
+
+  Sets the callback function that will be called when new data
+  arrives. The callback function will be passed a NULL pbuf to
+  indicate that the remote host has closed the connection. If
+  there are no errors and the callback function is to return
+  ERR_OK, then it must free the pbuf. Otherwise, it must not
+  free the pbuf so that lwIP core code can store it.
+
+- void tcp_recved(struct tcp_pcb *pcb, u16_t len)
+
+  Must be called when the application has received the data. The len
+  argument indicates the length of the received data.
+    
+
+--- Application polling
+
+When a connection is idle (i.e., no data is either transmitted or
+received), lwIP will repeatedly poll the application by calling a
+specified callback function. This can be used either as a watchdog
+timer for killing connections that have stayed idle for too long, or
+as a method of waiting for memory to become available. For instance,
+if a call to tcp_write() has failed because memory wasn't available,
+the application may use the polling functionality to call tcp_write()
+again when the connection has been idle for a while.
+
+- void tcp_poll(struct tcp_pcb *pcb, u8_t interval,
+                err_t (* poll)(void *arg, struct tcp_pcb *tpcb))
+
+  Specifies the polling interval and the callback function that should
+  be called to poll the application. The interval is specified in
+  number of TCP coarse grained timer shots, which typically occurs
+  twice a second. An interval of 10 means that the application would
+  be polled every 5 seconds.
+
+
+--- Closing and aborting connections
+
+- err_t tcp_close(struct tcp_pcb *pcb)
+
+  Closes the connection. The function may return ERR_MEM if no memory
+  was available for closing the connection. If so, the application
+  should wait and try again either by using the acknowledgment
+  callback or the polling functionality. If the close succeeds, the
+  function returns ERR_OK.
+
+  The pcb is deallocated by the TCP code after a call to tcp_close(). 
+
+- void tcp_abort(struct tcp_pcb *pcb)
+
+  Aborts the connection by sending a RST (reset) segment to the remote
+  host. The pcb is deallocated. This function never fails.
+
+If a connection is aborted because of an error, the application is
+alerted of this event by the err callback. Errors that might abort a
+connection are when there is a shortage of memory. The callback
+function to be called is set using the tcp_err() function.
+
+- void tcp_err(struct tcp_pcb *pcb, void (* err)(void *arg,
+       err_t err))
+
+  The error callback function does not get the pcb passed to it as a
+  parameter since the pcb may already have been deallocated.
+
+
+--- Lower layer TCP interface
+
+TCP provides a simple interface to the lower layers of the
+system. During system initialization, the function tcp_init() has
+to be called before any other TCP function is called. When the system
+is running, the two timer functions tcp_fasttmr() and tcp_slowtmr()
+must be called with regular intervals. The tcp_fasttmr() should be
+called every TCP_FAST_INTERVAL milliseconds (defined in tcp.h) and
+tcp_slowtmr() should be called every TCP_SLOW_INTERVAL milliseconds. 
+
+
+--- UDP interface
+
+The UDP interface is similar to that of TCP, but due to the lower
+level of complexity of UDP, the interface is significantly simpler.
+
+- struct udp_pcb *udp_new(void)
+
+  Creates a new UDP pcb which can be used for UDP communication. The
+  pcb is not active until it has either been bound to a local address
+  or connected to a remote address.
+
+- void udp_remove(struct udp_pcb *pcb)
+
+  Removes and deallocates the pcb.  
+  
+- err_t udp_bind(struct udp_pcb *pcb, struct ip_addr *ipaddr,
+                 u16_t port)
+
+  Binds the pcb to a local address. The IP-address argument "ipaddr"
+  can be IP_ADDR_ANY to indicate that it should listen to any local IP
+  address. The function currently always return ERR_OK.
+
+- err_t udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr,
+                    u16_t port)
+
+  Sets the remote end of the pcb. This function does not generate any
+  network traffic, but only set the remote address of the pcb.
+
+- err_t udp_disconnect(struct udp_pcb *pcb)
+
+  Remove the remote end of the pcb. This function does not generate
+  any network traffic, but only removes the remote address of the pcb.
+
+- err_t udp_send(struct udp_pcb *pcb, struct pbuf *p)
+
+  Sends the pbuf p. The pbuf is not deallocated.
+
+- void udp_recv(struct udp_pcb *pcb,
+                void (* recv)(void *arg, struct udp_pcb *upcb,
+                                         struct pbuf *p,
+                                         struct ip_addr *addr,
+                                         u16_t port),
+                              void *recv_arg)
+
+  Specifies a callback function that should be called when a UDP
+  datagram is received.
+  
+
+--- System initalization
+
+A truly complete and generic sequence for initializing the lwip stack
+cannot be given because it depends on the build configuration (lwipopts.h)
+and additional initializations for your runtime environment (e.g. timers).
+
+We can give you some idea on how to proceed when using the raw API.
+We assume a configuration using a single Ethernet netif and the
+UDP and TCP transport layers, IPv4 and the DHCP client.
+
+Call these functions in the order of appearance:
+
+- stats_init()
+
+  Clears the structure where runtime statistics are gathered.
+
+- sys_init()
+  
+  Not of much use since we set the NO_SYS 1 option in lwipopts.h,
+  to be called for easy configuration changes.
+
+- mem_init()
+
+  Initializes the dynamic memory heap defined by MEM_SIZE.
+
+- memp_init()
+
+  Initializes the memory pools defined by MEMP_NUM_x.
+
+- pbuf_init()
+
+  Initializes the pbuf memory pool defined by PBUF_POOL_SIZE.
+  
+- etharp_init()
+
+  Initializes the ARP table and queue.
+  Note: you must call etharp_tmr at a ARP_TMR_INTERVAL (5 seconds) regular interval
+  after this initialization.
+
+- ip_init()
+
+  Doesn't do much, it should be called to handle future changes.
+
+- udp_init()
+
+  Clears the UDP PCB list.
+
+- tcp_init()
+
+  Clears the TCP PCB list and clears some internal TCP timers.
+  Note: you must call tcp_fasttmr() and tcp_slowtmr() at the
+  predefined regular intervals after this initialization. 
+  
+- netif_add(struct netif *netif, struct ip_addr *ipaddr,
+            struct ip_addr *netmask, struct ip_addr *gw,
+            void *state, err_t (* init)(struct netif *netif),
+            err_t (* input)(struct pbuf *p, struct netif *netif))
+
+  Adds your network interface to the netif_list. Allocate a struct
+  netif and pass a pointer to this structure as the first argument.
+  Give pointers to cleared ip_addr structures when using DHCP,
+  or fill them with sane numbers otherwise. The state pointer may be NULL.
+
+  The init function pointer must point to a initialization function for
+  your ethernet netif interface. The following code illustrates it's use.
+  
+  err_t netif_if_init(struct netif *netif)
+  {
+    u8_t i;
+    
+    for(i = 0; i < ETHARP_HWADDR_LEN; i++) netif->hwaddr[i] = some_eth_addr[i];
+    init_my_eth_device();
+    return ERR_OK;
+  }
+  
+  For ethernet drivers, the input function pointer must point to the lwip
+  function ethernet_input() declared in "netif/etharp.h". Other drivers
+  must use ip_input() declared in "lwip/ip.h".
+  
+- netif_set_default(struct netif *netif)
+
+  Registers the default network interface.
+
+- netif_set_up(struct netif *netif)
+
+  When the netif is fully configured this function must be called.
+
+- dhcp_start(struct netif *netif)
+
+  Creates a new DHCP client for this interface on the first call.
+  Note: you must call dhcp_fine_tmr() and dhcp_coarse_tmr() at
+  the predefined regular intervals after starting the client.
+  
+  You can peek in the netif->dhcp struct for the actual DHCP status.
+
+
+--- Optimalization hints
+
+The first thing you want to optimize is the lwip_standard_checksum()
+routine from src/core/inet.c. You can override this standard
+function with the #define LWIP_CHKSUM <your_checksum_routine>.
+
+There are C examples given in inet.c or you might want to
+craft an assembly function for this. RFC1071 is a good
+introduction to this subject.
+
+Other significant improvements can be made by supplying
+assembly or inline replacements for htons() and htonl()
+if you're using a little-endian architecture.
+#define LWIP_PLATFORM_BYTESWAP 1
+#define LWIP_PLATFORM_HTONS(x) <your_htons>
+#define LWIP_PLATFORM_HTONL(x) <your_htonl>
+
+Check your network interface driver if it reads at
+a higher speed than the maximum wire-speed. If the
+hardware isn't serviced frequently and fast enough
+buffer overflows are likely to occur.
+
+E.g. when using the cs8900 driver, call cs8900if_service(ethif)
+as frequently as possible. When using an RTOS let the cs8900 interrupt
+wake a high priority task that services your driver using a binary
+semaphore or event flag. Some drivers might allow additional tuning
+to match your application and network.
+
+For a production release it is recommended to set LWIP_STATS to 0.
+Note that speed performance isn't influenced much by simply setting
+high values to the memory options.
diff --git a/firmware/x300/lwip/lwip-1.3.1/doc/savannah.txt b/firmware/x300/lwip/lwip-1.3.1/doc/savannah.txt
new file mode 100644
index 000000000..409905b10
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/doc/savannah.txt
@@ -0,0 +1,135 @@
+Daily Use Guide for using Savannah for lwIP
+
+Table of Contents:
+
+1 - Obtaining lwIP from the CVS repository
+2 - Committers/developers CVS access using SSH (to be written)
+3 - Merging from DEVEL branch to main trunk (stable branch)
+4 - How to release lwIP
+
+
+
+1 Obtaining lwIP from the CVS repository
+----------------------------------------
+
+To perform an anonymous CVS checkout of the main trunk (this is where
+bug fixes and incremental enhancements occur), do this:
+
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout lwip
+ 
+Or, obtain a stable branch (updated with bug fixes only) as follows:
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
+  -r STABLE-0_7 -d lwip-0.7 lwip
+
+Or, obtain a specific (fixed) release as follows:
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
+  -r STABLE-0_7_0 -d lwip-0.7.0 lwip
+
+3 Committers/developers CVS access using SSH
+--------------------------------------------
+
+The Savannah server uses SSH (Secure Shell) protocol 2 authentication and encryption.
+As such, CVS commits to the server occur through a SSH tunnel for project members.
+To create a SSH2 key pair in UNIX-like environments, do this:
+
+ssh-keygen -t dsa
+
+Under Windows, a recommended SSH client is "PuTTY", freely available with good
+documentation and a graphic user interface. Use its key generator.
+
+Now paste the id_dsa.pub contents into your Savannah account public key list. Wait
+a while so that Savannah can update its configuration (This can take minutes).
+
+Try to login using SSH:
+
+ssh -v your_login@cvs.sv.gnu.org
+
+If it tells you:
+
+Authenticating with public key "your_key_name"...
+Server refused to allocate pty
+
+then you could login; Savannah refuses to give you a shell - which is OK, as we
+are allowed to use SSH for CVS only. Now, you should be able to do this:
+
+export CVS_RSH=ssh
+cvs -z3 -d:ext:your_login@cvs.sv.gnu.org:/sources/lwip co lwip
+ 
+after which you can edit your local files with bug fixes or new features and
+commit them. Make sure you know what you are doing when using CVS to make
+changes on the repository. If in doubt, ask on the lwip-members mailing list.
+
+(If SSH asks about authenticity of the host, you can check the key
+ fingerprint against http://savannah.nongnu.org/cvs/?group=lwip)
+
+
+3 Merging from DEVEL branch to main trunk (stable)
+--------------------------------------------------
+
+Merging is a delicate process in CVS and requires the
+following disciplined steps in order to prevent conflicts
+in the future. Conflicts can be hard to solve!
+
+Merging from branch A to branch B requires that the A branch
+has a tag indicating the previous merger. This tag is called
+'merged_from_A_to_B'. After merging, the tag is moved in the
+A branch to remember this merger for future merge actions.
+
+IMPORTANT: AFTER COMMITTING A SUCCESFUL MERGE IN THE
+REPOSITORY, THE TAG MUST BE SET ON THE SOURCE BRANCH OF THE
+MERGE ACTION (REPLACING EXISTING TAGS WITH THE SAME NAME).
+
+Merge all changes in DEVEL since our last merge to main:
+
+In the working copy of the main trunk:
+cvs update -P -jmerged_from_DEVEL_to_main -jDEVEL 
+
+(This will apply the changes between 'merged_from_DEVEL_to_main'
+and 'DEVEL' to your work set of files)
+
+We can now commit the merge result.
+cvs commit -R -m "Merged from DEVEL to main." 
+
+If this worked out OK, we now move the tag in the DEVEL branch
+to this merge point, so we can use this point for future merges:
+
+cvs rtag -F -r DEVEL merged_from_DEVEL_to_main lwip 
+
+4 How to release lwIP
+---------------------
+
+First, checkout a clean copy of the branch to be released. Tag this set with
+tag name "STABLE-0_6_3". (I use release number 0.6.3 throughout this example).
+
+Login CVS using pserver authentication, then export a clean copy of the
+tagged tree. Export is similar to a checkout, except that the CVS metadata
+is not created locally. 
+
+export CVS_RSH=ssh
+cvs -z3 -d:pserver:anonymous@cvs.sv.gnu.org:/sources/lwip checkout \
+  -r STABLE-0_6_3 -d lwip-0.6.3 lwip
+
+Archive this directory using tar, gzip'd, bzip2'd and zip'd.
+
+tar czvf lwip-0.6.3.tar.gz lwip-0.6.3
+tar cjvf lwip-0.6.3.tar.bz2 lwip-0.6.3
+zip -r lwip-0.6.3.zip lwip-0.6.3
+
+Now, sign the archives with a detached GPG binary signature as follows:
+
+gpg -b lwip-0.6.3.tar.gz
+gpg -b lwip-0.6.3.tar.bz2
+gpg -b lwip-0.6.3.zip
+
+Upload these files using anonymous FTP:
+ncftp ftp://savannah.gnu.org/incoming/savannah/lwip
+
+ncftp>mput *0.6.3.*
+
+Additionally, you may post a news item on Savannah, like this:
+
+A new 0.6.3 release is now available here:
+http://savannah.nongnu.org/files/?group=lwip&highlight=0.6.3
+
+You will have to submit this via the user News interface, then approve
+this via the Administrator News interface.
\ No newline at end of file
diff --git a/firmware/x300/lwip/lwip-1.3.1/doc/snmp_agent.txt b/firmware/x300/lwip/lwip-1.3.1/doc/snmp_agent.txt
new file mode 100644
index 000000000..9b58616a6
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/doc/snmp_agent.txt
@@ -0,0 +1,181 @@
+SNMPv1 agent for lwIP
+
+Author: Christiaan Simons
+
+This is a brief introduction how to use and configure the SNMP agent.
+Note the agent uses the raw-API UDP interface so you may also want to
+read rawapi.txt to gain a better understanding of the SNMP message handling.
+
+0 Agent Capabilities
+====================
+
+SNMPv1 per RFC1157
+  This is an old(er) standard but is still widely supported.
+  For SNMPv2c and v3 have a greater complexity and need many
+  more lines of code. IMHO this breaks the idea of "lightweight IP".
+
+  Note the S in SNMP stands for "Simple". Note that "Simple" is
+  relative. SNMP is simple compared to the complex ISO network
+  management protocols CMIP (Common Management Information Protocol)
+  and CMOT (CMip Over Tcp).
+
+MIB II per RFC1213
+  The standard lwIP stack management information base.
+  This is a required MIB, so this is always enabled.
+  When builing lwIP without TCP, the mib-2.tcp group is omitted.
+  The groups EGP, CMOT and transmission are disabled by default.
+  
+  Most mib-2 objects are not writable except:
+  sysName, sysLocation, sysContact, snmpEnableAuthenTraps.
+  Writing to or changing the ARP and IP address and route
+  tables is not possible.
+ 
+  Note lwIP has a very limited notion of IP routing. It currently
+  doen't have a route table and doesn't have a notion of the U,G,H flags.
+  Instead lwIP uses the interface list with only one default interface
+  acting as a single gateway interface (G) for the default route.
+
+  The agent returns a "virtual table" with the default route 0.0.0.0
+  for the default interface and network routes (no H) for each
+  network interface in the netif_list.
+  All routes are considered to be up (U).
+
+Loading additional MIBs
+  MIBs can only be added in compile-time, not in run-time.
+  There is no MIB compiler thus additional MIBs must be hand coded.
+
+Large SNMP message support
+  The packet decoding and encoding routines are designed
+  to use pbuf-chains. Larger payloads then the minimum
+  SNMP requirement of 484 octets are supported if the 
+  PBUF_POOL_SIZE and IP_REASS_BUFSIZE are set to match your
+  local requirement.
+
+1 Building the Agent
+====================
+
+First of all you'll need to add the following define
+to your local lwipopts.h:
+
+#define LWIP_SNMP               1
+
+and add the source files in lwip/src/core/snmp
+and some snmp headers in lwip/src/include/lwip to your makefile.
+
+Note you'll might need to adapt you network driver to update
+the mib2 variables for your interface.
+
+2 Running the Agent
+===================
+
+The following function calls must be made in your program to
+actually get the SNMP agent running.
+
+Before starting the agent you should supply pointers
+to non-volatile memory for sysContact, sysLocation,
+and snmpEnableAuthenTraps. You can do this by calling
+
+snmp_set_syscontact()
+snmp_set_syslocation()
+snmp_set_snmpenableauthentraps()
+
+Additionally you may want to set
+
+snmp_set_sysdescr()
+snmp_set_sysobjid() (if you have a private MIB)
+snmp_set_sysname()
+
+Also before starting the agent you need to setup
+one or more trap destinations using these calls:
+
+snmp_trap_dst_enable();
+snmp_trap_dst_ip_set();
+
+In the lwIP initialisation sequence call snmp_init() just after
+the call to udp_init().
+
+Exactly every 10 msec the SNMP uptime timestamp must be updated with
+snmp_inc_sysuptime(). You should call this from a timer interrupt
+or a timer signal handler depending on your runtime environment.
+
+An alternative way to update the SNMP uptime timestamp is to do a call like
+snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but call to
+a lower frequency). Another one is to not call snmp_inc_sysuptime() or
+snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
+This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
+snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
+when it's queried (any function which need "sysuptime" have to call
+snmp_get_sysuptime).
+
+
+3 Private MIBs
+==============
+
+If want to extend the agent with your own private MIB you'll need to
+add the following define to your local lwipopts.h:
+
+#define SNMP_PRIVATE_MIB        1
+
+You must provide the private_mib.h and associated files yourself.
+Note we don't have a "MIB compiler" that generates C source from a MIB,
+so you're required to do some serious coding if you enable this!
+
+Note the lwIP enterprise ID (26381) is assigned to the lwIP project,
+ALL OBJECT IDENTIFIERS LIVING UNDER THIS ID ARE ASSIGNED BY THE lwIP
+MAINTAINERS!
+
+If you need to create your own private MIB you'll need
+to apply for your own enterprise ID with IANA: http://www.iana.org/numbers.html 
+
+You can set it by passing a struct snmp_obj_id to the agent
+using snmp_set_sysobjid(&my_object_id), just before snmp_init().
+
+Note the object identifiers for thes MIB-2 and your private MIB
+tree must be kept in sorted ascending (lexicographical) order.
+This to ensure correct getnext operation.
+
+An example for a private MIB is part of the "minimal Unix" project:
+contrib/ports/unix/proj/minimal/lwip_prvmib.c
+
+The next chapter gives a more detailed description of the
+MIB-2 tree and the optional private MIB.
+
+4 The Gory Details
+==================
+
+4.0 Object identifiers and the MIB tree.
+
+We have three distinct parts for all object identifiers:
+
+The prefix
+  .iso.org.dod.internet
+
+the middle part 
+  .mgmt.mib-2.ip.ipNetToMediaTable.ipNetToMediaEntry.ipNetToMediaPhysAddress
+
+and the index part
+  .1.192.168.0.1
+
+Objects located above the .internet hierarchy aren't supported.
+Currently only the .mgmt sub-tree is available and
+when the SNMP_PRIVATE_MIB is enabled the .private tree
+becomes available too.
+
+Object identifiers from incoming requests are checked
+for a matching prefix, middle part and index part
+or are expanded(*) for GetNext requests with short
+or inexisting names in the request.
+(* we call this "expansion" but this also
+resembles the "auto-completion" operation)
+
+The middle part is usually located in ROM (const)
+to preserve precious RAM on small microcontrollers.
+However RAM location is possible for an dynamically
+changing private tree.
+
+The index part is handled by functions which in
+turn use dynamically allocated index trees from RAM.
+These trees are updated by e.g. the etharp code
+when new entries are made or removed form the ARP cache.
+
+/** @todo more gory details */
diff --git a/firmware/x300/lwip/lwip-1.3.1/doc/sys_arch.txt b/firmware/x300/lwip/lwip-1.3.1/doc/sys_arch.txt
new file mode 100644
index 000000000..66310a91e
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/doc/sys_arch.txt
@@ -0,0 +1,228 @@
+sys_arch interface for lwIP 0.6++
+
+Author: Adam Dunkels
+
+The operating system emulation layer provides a common interface
+between the lwIP code and the underlying operating system kernel. The
+general idea is that porting lwIP to new architectures requires only
+small changes to a few header files and a new sys_arch
+implementation. It is also possible to do a sys_arch implementation
+that does not rely on any underlying operating system.
+
+The sys_arch provides semaphores and mailboxes to lwIP. For the full
+lwIP functionality, multiple threads support can be implemented in the
+sys_arch, but this is not required for the basic lwIP
+functionality. Previous versions of lwIP required the sys_arch to
+implement timer scheduling as well but as of lwIP 0.5 this is
+implemented in a higher layer.
+
+In addition to the source file providing the functionality of sys_arch,
+the OS emulation layer must provide several header files defining
+macros used throughout lwip.  The files required and the macros they
+must define are listed below the sys_arch description.
+
+Semaphores can be either counting or binary - lwIP works with both
+kinds. Mailboxes are used for message passing and can be implemented
+either as a queue which allows multiple messages to be posted to a
+mailbox, or as a rendez-vous point where only one message can be
+posted at a time. lwIP works with both kinds, but the former type will
+be more efficient. A message in a mailbox is just a pointer, nothing
+more. 
+
+Semaphores are represented by the type "sys_sem_t" which is typedef'd
+in the sys_arch.h file. Mailboxes are equivalently represented by the
+type "sys_mbox_t". lwIP does not place any restrictions on how
+sys_sem_t or sys_mbox_t are represented internally.
+
+The following functions must be implemented by the sys_arch:
+
+- void sys_init(void)
+
+  Is called to initialize the sys_arch layer.
+
+- sys_sem_t sys_sem_new(u8_t count)
+
+  Creates and returns a new semaphore. The "count" argument specifies
+  the initial state of the semaphore.
+
+- void sys_sem_free(sys_sem_t sem)
+
+  Deallocates a semaphore.
+
+- void sys_sem_signal(sys_sem_t sem)
+
+  Signals a semaphore.
+
+- u32_t sys_arch_sem_wait(sys_sem_t sem, u32_t timeout)
+
+  Blocks the thread while waiting for the semaphore to be
+  signaled. If the "timeout" argument is non-zero, the thread should
+  only be blocked for the specified time (measured in
+  milliseconds). If the "timeout" argument is zero, the thread should be
+  blocked until the semaphore is signalled.
+
+  If the timeout argument is non-zero, the return value is the number of
+  milliseconds spent waiting for the semaphore to be signaled. If the
+  semaphore wasn't signaled within the specified time, the return value is
+  SYS_ARCH_TIMEOUT. If the thread didn't have to wait for the semaphore
+  (i.e., it was already signaled), the function may return zero.
+
+  Notice that lwIP implements a function with a similar name,
+  sys_sem_wait(), that uses the sys_arch_sem_wait() function.
+
+- sys_mbox_t sys_mbox_new(int size)
+
+  Creates an empty mailbox for maximum "size" elements. Elements stored
+  in mailboxes are pointers. You have to define macros "_MBOX_SIZE"
+  in your lwipopts.h, or ignore this parameter in your implementation
+  and use a default size.
+
+- void sys_mbox_free(sys_mbox_t mbox)
+
+  Deallocates a mailbox. If there are messages still present in the
+  mailbox when the mailbox is deallocated, it is an indication of a
+  programming error in lwIP and the developer should be notified.
+
+- void sys_mbox_post(sys_mbox_t mbox, void *msg)
+
+  Posts the "msg" to the mailbox. This function have to block until
+  the "msg" is really posted.
+
+- err_t sys_mbox_trypost(sys_mbox_t mbox, void *msg)
+
+  Try to post the "msg" to the mailbox. Returns ERR_MEM if this one
+  is full, else, ERR_OK if the "msg" is posted.
+
+- u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u32_t timeout)
+
+  Blocks the thread until a message arrives in the mailbox, but does
+  not block the thread longer than "timeout" milliseconds (similar to
+  the sys_arch_sem_wait() function). If "timeout" is 0, the thread should
+  be blocked until a message arrives. The "msg" argument is a result
+  parameter that is set by the function (i.e., by doing "*msg =
+  ptr"). The "msg" parameter maybe NULL to indicate that the message
+  should be dropped.
+
+  The return values are the same as for the sys_arch_sem_wait() function:
+  Number of milliseconds spent waiting or SYS_ARCH_TIMEOUT if there was a
+  timeout.
+
+  Note that a function with a similar name, sys_mbox_fetch(), is
+  implemented by lwIP. 
+
+- u32_t sys_arch_mbox_tryfetch(sys_mbox_t mbox, void **msg)
+
+  This is similar to sys_arch_mbox_fetch, however if a message is not
+  present in the mailbox, it immediately returns with the code
+  SYS_MBOX_EMPTY. On success 0 is returned.
+
+  To allow for efficient implementations, this can be defined as a
+  function-like macro in sys_arch.h instead of a normal function. For
+  example, a naive implementation could be:
+    #define sys_arch_mbox_tryfetch(mbox,msg) \
+      sys_arch_mbox_fetch(mbox,msg,1)
+  although this would introduce unnecessary delays.
+  
+- struct sys_timeouts *sys_arch_timeouts(void)
+
+  Returns a pointer to the per-thread sys_timeouts structure. In lwIP,
+  each thread has a list of timeouts which is repressented as a linked
+  list of sys_timeout structures. The sys_timeouts structure holds a
+  pointer to a linked list of timeouts. This function is called by
+  the lwIP timeout scheduler and must not return a NULL value. 
+
+  In a single thread sys_arch implementation, this function will
+  simply return a pointer to a global sys_timeouts variable stored in
+  the sys_arch module.
+  
+If threads are supported by the underlying operating system and if
+such functionality is needed in lwIP, the following function will have
+to be implemented as well:
+
+- sys_thread_t sys_thread_new(char *name, void (* thread)(void *arg), void *arg, int stacksize, int prio)
+
+  Starts a new thread named "name" with priority "prio" that will begin its
+  execution in the function "thread()". The "arg" argument will be passed as an
+  argument to the thread() function. The stack size to used for this thread is
+  the "stacksize" parameter. The id of the new thread is returned. Both the id
+  and the priority are system dependent.
+
+- sys_prot_t sys_arch_protect(void)
+
+  This optional function does a "fast" critical region protection and returns
+  the previous protection level. This function is only called during very short
+  critical regions. An embedded system which supports ISR-based drivers might
+  want to implement this function by disabling interrupts. Task-based systems
+  might want to implement this by using a mutex or disabling tasking. This
+  function should support recursive calls from the same task or interrupt. In
+  other words, sys_arch_protect() could be called while already protected. In
+  that case the return value indicates that it is already protected.
+
+  sys_arch_protect() is only required if your port is supporting an operating
+  system.
+
+- void sys_arch_unprotect(sys_prot_t pval)
+
+  This optional function does a "fast" set of critical region protection to the
+  value specified by pval. See the documentation for sys_arch_protect() for
+  more information. This function is only required if your port is supporting
+  an operating system.
+
+Note:
+
+Be carefull with using mem_malloc() in sys_arch. When malloc() refers to
+mem_malloc() you can run into a circular function call problem. In mem.c
+mem_init() tries to allcate a semaphore using mem_malloc, which of course
+can't be performed when sys_arch uses mem_malloc.
+
+-------------------------------------------------------------------------------
+Additional files required for the "OS support" emulation layer:
+-------------------------------------------------------------------------------
+
+cc.h       - Architecture environment, some compiler specific, some
+             environment specific (probably should move env stuff 
+             to sys_arch.h.)
+
+  Typedefs for the types used by lwip -
+    u8_t, s8_t, u16_t, s16_t, u32_t, s32_t, mem_ptr_t
+
+  Compiler hints for packing lwip's structures -
+    PACK_STRUCT_FIELD(x)
+    PACK_STRUCT_STRUCT
+    PACK_STRUCT_BEGIN
+    PACK_STRUCT_END
+
+  Platform specific diagnostic output -
+    LWIP_PLATFORM_DIAG(x)    - non-fatal, print a message.
+    LWIP_PLATFORM_ASSERT(x)  - fatal, print message and abandon execution.
+    Portability defines for printf formatters:
+    U16_F, S16_F, X16_F, U32_F, S32_F, X32_F, SZT_F
+
+  "lightweight" synchronization mechanisms -
+    SYS_ARCH_DECL_PROTECT(x) - declare a protection state variable.
+    SYS_ARCH_PROTECT(x)      - enter protection mode.
+    SYS_ARCH_UNPROTECT(x)    - leave protection mode.
+
+  If the compiler does not provide memset() this file must include a
+  definition of it, or include a file which defines it.
+
+  This file must either include a system-local <errno.h> which defines
+  the standard *nix error codes, or it should #define LWIP_PROVIDE_ERRNO
+  to make lwip/arch.h define the codes which are used throughout.
+
+
+perf.h     - Architecture specific performance measurement.
+  Measurement calls made throughout lwip, these can be defined to nothing.
+    PERF_START               - start measuring something.
+    PERF_STOP(x)             - stop measuring something, and record the result.
+
+sys_arch.h - Tied to sys_arch.c
+
+  Arch dependent types for the following objects:
+    sys_sem_t, sys_mbox_t, sys_thread_t,
+  And, optionally:
+    sys_prot_t
+
+  Defines to set vars of sys_mbox_t and sys_sem_t to NULL.
+    SYS_MBOX_NULL NULL
+    SYS_SEM_NULL NULL
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/.hgignore b/firmware/x300/lwip/lwip-1.3.1/src/.hgignore
new file mode 100644
index 000000000..f88587df3
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/.hgignore
@@ -0,0 +1,26 @@
+syntax: glob 
+ 
+*.pyc 
+*.orig 
+*.rej 
+*~ 
+TAGS 
+Module.symvers 
+*.ncb
+*.suo
+*.bak
+*.orig
+*.rej
+
+syntax: regexp
+\.\#.+
+[\\/]CVS$
+^CVS$
+^build$
+^install$
+^logs.build_tree$
+[\\/]bin$
+^bin$
+[\\/]obj$
+^obj$
+\.cvsignore
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/FILES b/firmware/x300/lwip/lwip-1.3.1/src/FILES
new file mode 100644
index 000000000..952aeabb4
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/FILES
@@ -0,0 +1,13 @@
+api/      - The code for the high-level wrapper API. Not needed if
+            you use the lowel-level call-back/raw API.
+
+core/     - The core of the TPC/IP stack; protocol implementations,
+            memory and buffer management, and the low-level raw API.
+
+include/  - lwIP include files.
+
+netif/    - Generic network interface device drivers are kept here,
+            as well as the ARP module.
+
+For more information on the various subdirectories, check the FILES
+file in each directory.
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/api_lib.c b/firmware/x300/lwip/lwip-1.3.1/src/api/api_lib.c
new file mode 100644
index 000000000..86df911ea
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/api_lib.c
@@ -0,0 +1,557 @@
+/**
+ * @file
+ * Sequential API External module
+ *
+ */
+ 
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/* This is the part of the API that is linked with
+   the application */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/api.h"
+#include "lwip/tcpip.h"
+#include "lwip/memp.h"
+
+#include "lwip/ip.h"
+#include "lwip/raw.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+
+#include <string.h>
+
+/**
+ * Create a new netconn (of a specific type) that has a callback function.
+ * The corresponding pcb is also created.
+ *
+ * @param t the type of 'connection' to create (@see enum netconn_type)
+ * @param proto the IP protocol for RAW IP pcbs
+ * @param callback a function to call on status changes (RX available, TX'ed)
+ * @return a newly allocated struct netconn or
+ *         NULL on memory error
+ */
+struct netconn*
+netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto, netconn_callback callback)
+{
+  struct netconn *conn;
+  struct api_msg msg;
+
+  conn = netconn_alloc(t, callback);
+  if (conn != NULL ) {
+    msg.function = do_newconn;
+    msg.msg.msg.n.proto = proto;
+    msg.msg.conn = conn;
+    TCPIP_APIMSG(&msg);
+
+    if (conn->err != ERR_OK) {
+      LWIP_ASSERT("freeing conn without freeing pcb", conn->pcb.tcp == NULL);
+      LWIP_ASSERT("conn has no op_completed", conn->op_completed != SYS_SEM_NULL);
+      LWIP_ASSERT("conn has no recvmbox", conn->recvmbox != SYS_MBOX_NULL);
+      LWIP_ASSERT("conn->acceptmbox shouldn't exist", conn->acceptmbox == SYS_MBOX_NULL);
+      sys_sem_free(conn->op_completed);
+      sys_mbox_free(conn->recvmbox);
+      memp_free(MEMP_NETCONN, conn);
+      return NULL;
+    }
+  }
+  return conn;
+}
+
+/**
+ * Close a netconn 'connection' and free its resources.
+ * UDP and RAW connection are completely closed, TCP pcbs might still be in a waitstate
+ * after this returns.
+ *
+ * @param conn the netconn to delete
+ * @return ERR_OK if the connection was deleted
+ */
+err_t
+netconn_delete(struct netconn *conn)
+{
+  struct api_msg msg;
+
+  /* No ASSERT here because possible to get a (conn == NULL) if we got an accept error */
+  if (conn == NULL) {
+    return ERR_OK;
+  }
+
+  msg.function = do_delconn;
+  msg.msg.conn = conn;
+  tcpip_apimsg(&msg);
+
+  conn->pcb.tcp = NULL;
+  netconn_free(conn);
+
+  return ERR_OK;
+}
+
+/**
+ * Get the local or remote IP address and port of a netconn.
+ * For RAW netconns, this returns the protocol instead of a port!
+ *
+ * @param conn the netconn to query
+ * @param addr a pointer to which to save the IP address
+ * @param port a pointer to which to save the port (or protocol for RAW)
+ * @param local 1 to get the local IP address, 0 to get the remote one
+ * @return ERR_CONN for invalid connections
+ *         ERR_OK if the information was retrieved
+ */
+err_t
+netconn_getaddr(struct netconn *conn, struct ip_addr *addr, u16_t *port, u8_t local)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_getaddr: invalid conn", (conn != NULL), return ERR_ARG;);
+  LWIP_ERROR("netconn_getaddr: invalid addr", (addr != NULL), return ERR_ARG;);
+  LWIP_ERROR("netconn_getaddr: invalid port", (port != NULL), return ERR_ARG;);
+
+  msg.function = do_getaddr;
+  msg.msg.conn = conn;
+  msg.msg.msg.ad.ipaddr = addr;
+  msg.msg.msg.ad.port = port;
+  msg.msg.msg.ad.local = local;
+  TCPIP_APIMSG(&msg);
+
+  return conn->err;
+}
+
+/**
+ * Bind a netconn to a specific local IP address and port.
+ * Binding one netconn twice might not always be checked correctly!
+ *
+ * @param conn the netconn to bind
+ * @param addr the local IP address to bind the netconn to (use IP_ADDR_ANY
+ *             to bind to all addresses)
+ * @param port the local port to bind the netconn to (not used for RAW)
+ * @return ERR_OK if bound, any other err_t on failure
+ */
+err_t
+netconn_bind(struct netconn *conn, struct ip_addr *addr, u16_t port)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_bind: invalid conn", (conn != NULL), return ERR_ARG;);
+
+  msg.function = do_bind;
+  msg.msg.conn = conn;
+  msg.msg.msg.bc.ipaddr = addr;
+  msg.msg.msg.bc.port = port;
+  TCPIP_APIMSG(&msg);
+  return conn->err;
+}
+
+/**
+ * Connect a netconn to a specific remote IP address and port.
+ *
+ * @param conn the netconn to connect
+ * @param addr the remote IP address to connect to
+ * @param port the remote port to connect to (no used for RAW)
+ * @return ERR_OK if connected, return value of tcp_/udp_/raw_connect otherwise
+ */
+err_t
+netconn_connect(struct netconn *conn, struct ip_addr *addr, u16_t port)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_connect: invalid conn", (conn != NULL), return ERR_ARG;);
+
+  msg.function = do_connect;
+  msg.msg.conn = conn;
+  msg.msg.msg.bc.ipaddr = addr;
+  msg.msg.msg.bc.port = port;
+  /* This is the only function which need to not block tcpip_thread */
+  tcpip_apimsg(&msg);
+  return conn->err;
+}
+
+/**
+ * Disconnect a netconn from its current peer (only valid for UDP netconns).
+ *
+ * @param conn the netconn to disconnect
+ * @return TODO: return value is not set here...
+ */
+err_t
+netconn_disconnect(struct netconn *conn)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_disconnect: invalid conn", (conn != NULL), return ERR_ARG;);
+
+  msg.function = do_disconnect;
+  msg.msg.conn = conn;
+  TCPIP_APIMSG(&msg);
+  return conn->err;
+}
+
+/**
+ * Set a TCP netconn into listen mode
+ *
+ * @param conn the tcp netconn to set to listen mode
+ * @param backlog the listen backlog, only used if TCP_LISTEN_BACKLOG==1
+ * @return ERR_OK if the netconn was set to listen (UDP and RAW netconns
+ *         don't return any error (yet?))
+ */
+err_t
+netconn_listen_with_backlog(struct netconn *conn, u8_t backlog)
+{
+  struct api_msg msg;
+
+  /* This does no harm. If TCP_LISTEN_BACKLOG is off, backlog is unused. */
+  LWIP_UNUSED_ARG(backlog);
+
+  LWIP_ERROR("netconn_listen: invalid conn", (conn != NULL), return ERR_ARG;);
+
+  msg.function = do_listen;
+  msg.msg.conn = conn;
+#if TCP_LISTEN_BACKLOG
+  msg.msg.msg.lb.backlog = backlog;
+#endif /* TCP_LISTEN_BACKLOG */
+  TCPIP_APIMSG(&msg);
+  return conn->err;
+}
+
+/**
+ * Accept a new connection on a TCP listening netconn.
+ *
+ * @param conn the TCP listen netconn
+ * @return the newly accepted netconn or NULL on timeout
+ */
+struct netconn *
+netconn_accept(struct netconn *conn)
+{
+  struct netconn *newconn;
+
+  LWIP_ERROR("netconn_accept: invalid conn",       (conn != NULL),                      return NULL;);
+  LWIP_ERROR("netconn_accept: invalid acceptmbox", (conn->acceptmbox != SYS_MBOX_NULL), return NULL;);
+
+#if LWIP_SO_RCVTIMEO
+  if (sys_arch_mbox_fetch(conn->acceptmbox, (void *)&newconn, conn->recv_timeout) == SYS_ARCH_TIMEOUT) {
+    newconn = NULL;
+  } else
+#else
+  sys_arch_mbox_fetch(conn->acceptmbox, (void *)&newconn, 0);
+#endif /* LWIP_SO_RCVTIMEO*/
+  {
+    /* Register event with callback */
+    API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0);
+
+#if TCP_LISTEN_BACKLOG
+    if (newconn != NULL) {
+      /* Let the stack know that we have accepted the connection. */
+      struct api_msg msg;
+      msg.function = do_recv;
+      msg.msg.conn = conn;
+      TCPIP_APIMSG(&msg);
+    }
+#endif /* TCP_LISTEN_BACKLOG */
+  }
+
+  return newconn;
+}
+
+/**
+ * Receive data (in form of a netbuf containing a packet buffer) from a netconn
+ *
+ * @param conn the netconn from which to receive data
+ * @return a new netbuf containing received data or NULL on memory error or timeout
+ */
+struct netbuf *
+netconn_recv(struct netconn *conn)
+{
+  struct api_msg msg;
+  struct netbuf *buf = NULL;
+  struct pbuf *p;
+  u16_t len;
+
+  LWIP_ERROR("netconn_recv: invalid conn",  (conn != NULL), return NULL;);
+
+  if (conn->recvmbox == SYS_MBOX_NULL) {
+    /* @todo: should calling netconn_recv on a TCP listen conn be fatal (ERR_CONN)?? */
+    /* TCP listen conns don't have a recvmbox! */
+    conn->err = ERR_CONN;
+    return NULL;
+  }
+
+  if (ERR_IS_FATAL(conn->err)) {
+    return NULL;
+  }
+
+  if (conn->type == NETCONN_TCP) {
+#if LWIP_TCP
+    if (conn->state == NETCONN_LISTEN) {
+      /* @todo: should calling netconn_recv on a TCP listen conn be fatal?? */
+      conn->err = ERR_CONN;
+      return NULL;
+    }
+
+    buf = memp_malloc(MEMP_NETBUF);
+
+    if (buf == NULL) {
+      conn->err = ERR_MEM;
+      return NULL;
+    }
+
+#if LWIP_SO_RCVTIMEO
+    if (sys_arch_mbox_fetch(conn->recvmbox, (void *)&p, conn->recv_timeout)==SYS_ARCH_TIMEOUT) {
+      conn->err = ERR_TIMEOUT;
+      p = NULL;
+    }
+#else
+    sys_arch_mbox_fetch(conn->recvmbox, (void *)&p, 0);
+#endif /* LWIP_SO_RCVTIMEO*/
+
+    if (p != NULL) {
+      len = p->tot_len;
+      SYS_ARCH_DEC(conn->recv_avail, len);
+    } else {
+      len = 0;
+    }
+
+    /* Register event with callback */
+    API_EVENT(conn, NETCONN_EVT_RCVMINUS, len);
+
+    /* If we are closed, we indicate that we no longer wish to use the socket */
+    if (p == NULL) {
+      memp_free(MEMP_NETBUF, buf);
+      /* Avoid to lose any previous error code */
+      if (conn->err == ERR_OK) {
+        conn->err = ERR_CLSD;
+      }
+      return NULL;
+    }
+
+    buf->p = p;
+    buf->ptr = p;
+    buf->port = 0;
+    buf->addr = NULL;
+
+    /* Let the stack know that we have taken the data. */
+    msg.function = do_recv;
+    msg.msg.conn = conn;
+    if (buf != NULL) {
+      msg.msg.msg.r.len = buf->p->tot_len;
+    } else {
+      msg.msg.msg.r.len = 1;
+    }
+    TCPIP_APIMSG(&msg);
+#endif /* LWIP_TCP */
+  } else {
+#if (LWIP_UDP || LWIP_RAW)
+#if LWIP_SO_RCVTIMEO
+    if (sys_arch_mbox_fetch(conn->recvmbox, (void *)&buf, conn->recv_timeout)==SYS_ARCH_TIMEOUT) {
+      buf = NULL;
+    }
+#else
+    sys_arch_mbox_fetch(conn->recvmbox, (void *)&buf, 0);
+#endif /* LWIP_SO_RCVTIMEO*/
+    if (buf!=NULL) {
+      SYS_ARCH_DEC(conn->recv_avail, buf->p->tot_len);
+      /* Register event with callback */
+      API_EVENT(conn, NETCONN_EVT_RCVMINUS, buf->p->tot_len);
+    }
+#endif /* (LWIP_UDP || LWIP_RAW) */
+  }
+
+  LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv: received %p (err %d)\n", (void *)buf, conn->err));
+
+  return buf;
+}
+
+/**
+ * Send data (in form of a netbuf) to a specific remote IP address and port.
+ * Only to be used for UDP and RAW netconns (not TCP).
+ *
+ * @param conn the netconn over which to send data
+ * @param buf a netbuf containing the data to send
+ * @param addr the remote IP address to which to send the data
+ * @param port the remote port to which to send the data
+ * @return ERR_OK if data was sent, any other err_t on error
+ */
+err_t
+netconn_sendto(struct netconn *conn, struct netbuf *buf, struct ip_addr *addr, u16_t port)
+{
+  if (buf != NULL) {
+    buf->addr = addr;
+    buf->port = port;
+    return netconn_send(conn, buf);
+  }
+  return ERR_VAL;
+}
+
+/**
+ * Send data over a UDP or RAW netconn (that is already connected).
+ *
+ * @param conn the UDP or RAW netconn over which to send data
+ * @param buf a netbuf containing the data to send
+ * @return ERR_OK if data was sent, any other err_t on error
+ */
+err_t
+netconn_send(struct netconn *conn, struct netbuf *buf)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_send: invalid conn",  (conn != NULL), return ERR_ARG;);
+
+  LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %"U16_F" bytes\n", buf->p->tot_len));
+  msg.function = do_send;
+  msg.msg.conn = conn;
+  msg.msg.msg.b = buf;
+  TCPIP_APIMSG(&msg);
+  return conn->err;
+}
+
+/**
+ * Send data over a TCP netconn.
+ *
+ * @param conn the TCP netconn over which to send data
+ * @param dataptr pointer to the application buffer that contains the data to send
+ * @param size size of the application data to send
+ * @param apiflags combination of following flags :
+ * - NETCONN_COPY (0x01) data will be copied into memory belonging to the stack
+ * - NETCONN_MORE (0x02) for TCP connection, PSH flag will be set on last segment sent
+ * @return ERR_OK if data was sent, any other err_t on error
+ */
+err_t
+netconn_write(struct netconn *conn, const void *dataptr, size_t size, u8_t apiflags)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_write: invalid conn",  (conn != NULL), return ERR_ARG;);
+  LWIP_ERROR("netconn_write: invalid conn->type",  (conn->type == NETCONN_TCP), return ERR_VAL;);
+
+  msg.function = do_write;
+  msg.msg.conn = conn;
+  msg.msg.msg.w.dataptr = dataptr;
+  msg.msg.msg.w.apiflags = apiflags;
+  msg.msg.msg.w.len = size;
+  /* For locking the core: this _can_ be delayed on low memory/low send buffer,
+     but if it is, this is done inside api_msg.c:do_write(), so we can use the
+     non-blocking version here. */
+  TCPIP_APIMSG(&msg);
+  return conn->err;
+}
+
+/**
+ * Close a TCP netconn (doesn't delete it).
+ *
+ * @param conn the TCP netconn to close
+ * @return ERR_OK if the netconn was closed, any other err_t on error
+ */
+err_t
+netconn_close(struct netconn *conn)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_close: invalid conn",  (conn != NULL), return ERR_ARG;);
+
+  msg.function = do_close;
+  msg.msg.conn = conn;
+  tcpip_apimsg(&msg);
+  return conn->err;
+}
+
+#if LWIP_IGMP
+/**
+ * Join multicast groups for UDP netconns.
+ *
+ * @param conn the UDP netconn for which to change multicast addresses
+ * @param multiaddr IP address of the multicast group to join or leave
+ * @param interface the IP address of the network interface on which to send
+ *                  the igmp message
+ * @param join_or_leave flag whether to send a join- or leave-message
+ * @return ERR_OK if the action was taken, any err_t on error
+ */
+err_t
+netconn_join_leave_group(struct netconn *conn,
+                         struct ip_addr *multiaddr,
+                         struct ip_addr *interface,
+                         enum netconn_igmp join_or_leave)
+{
+  struct api_msg msg;
+
+  LWIP_ERROR("netconn_join_leave_group: invalid conn",  (conn != NULL), return ERR_ARG;);
+
+  msg.function = do_join_leave_group;
+  msg.msg.conn = conn;
+  msg.msg.msg.jl.multiaddr = multiaddr;
+  msg.msg.msg.jl.interface = interface;
+  msg.msg.msg.jl.join_or_leave = join_or_leave;
+  TCPIP_APIMSG(&msg);
+  return conn->err;
+}
+#endif /* LWIP_IGMP */
+
+#if LWIP_DNS
+/**
+ * Execute a DNS query, only one IP address is returned
+ *
+ * @param name a string representation of the DNS host name to query
+ * @param addr a preallocated struct ip_addr where to store the resolved IP address
+ * @return ERR_OK: resolving succeeded
+ *         ERR_MEM: memory error, try again later
+ *         ERR_ARG: dns client not initialized or invalid hostname
+ *         ERR_VAL: dns server response was invalid
+ */
+err_t
+netconn_gethostbyname(const char *name, struct ip_addr *addr)
+{
+  struct dns_api_msg msg;
+  err_t err;
+  sys_sem_t sem;
+
+  LWIP_ERROR("netconn_gethostbyname: invalid name", (name != NULL), return ERR_ARG;);
+  LWIP_ERROR("netconn_gethostbyname: invalid addr", (addr != NULL), return ERR_ARG;);
+
+  sem = sys_sem_new(0);
+  if (sem == SYS_SEM_NULL) {
+    return ERR_MEM;
+  }
+
+  msg.name = name;
+  msg.addr = addr;
+  msg.err = &err;
+  msg.sem = sem;
+
+  tcpip_callback(do_gethostbyname, &msg);
+  sys_sem_wait(sem);
+  sys_sem_free(sem);
+
+  return err;
+}
+#endif /* LWIP_DNS*/
+
+#endif /* LWIP_NETCONN */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/api_msg.c b/firmware/x300/lwip/lwip-1.3.1/src/api/api_msg.c
new file mode 100644
index 000000000..28d101019
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/api_msg.c
@@ -0,0 +1,1232 @@
+/**
+ * @file
+ * Sequential API Internal module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/api_msg.h"
+
+#include "lwip/ip.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+#include "lwip/raw.h"
+
+#include "lwip/memp.h"
+#include "lwip/tcpip.h"
+#include "lwip/igmp.h"
+#include "lwip/dns.h"
+
+#include <string.h>
+
+/* forward declarations */
+#if LWIP_TCP
+static err_t do_writemore(struct netconn *conn);
+static void do_close_internal(struct netconn *conn);
+#endif
+
+#if LWIP_RAW
+/**
+ * Receive callback function for RAW netconns.
+ * Doesn't 'eat' the packet, only references it and sends it to
+ * conn->recvmbox
+ *
+ * @see raw.h (struct raw_pcb.recv) for parameters and return value
+ */
+static u8_t
+recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
+    struct ip_addr *addr)
+{
+  struct pbuf *q;
+  struct netbuf *buf;
+  struct netconn *conn;
+#if LWIP_SO_RCVBUF
+  int recv_avail;
+#endif /* LWIP_SO_RCVBUF */
+
+  LWIP_UNUSED_ARG(addr);
+  conn = arg;
+
+#if LWIP_SO_RCVBUF
+  SYS_ARCH_GET(conn->recv_avail, recv_avail);
+  if ((conn != NULL) && (conn->recvmbox != SYS_MBOX_NULL) &&
+      ((recv_avail + (int)(p->tot_len)) <= conn->recv_bufsize)) {
+#else  /* LWIP_SO_RCVBUF */
+  if ((conn != NULL) && (conn->recvmbox != SYS_MBOX_NULL)) {
+#endif /* LWIP_SO_RCVBUF */
+    /* copy the whole packet into new pbufs */
+    q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
+    if(q != NULL) {
+      if (pbuf_copy(q, p) != ERR_OK) {
+        pbuf_free(q);
+        q = NULL;
+      }
+    }
+
+    if(q != NULL) {
+      buf = memp_malloc(MEMP_NETBUF);
+      if (buf == NULL) {
+        pbuf_free(q);
+        return 0;
+      }
+
+      buf->p = q;
+      buf->ptr = q;
+      buf->addr = &(((struct ip_hdr*)(q->payload))->src);
+      buf->port = pcb->protocol;
+
+      if (sys_mbox_trypost(conn->recvmbox, buf) != ERR_OK) {
+        netbuf_delete(buf);
+        return 0;
+      } else {
+        SYS_ARCH_INC(conn->recv_avail, q->tot_len);
+        /* Register event with callback */
+        API_EVENT(conn, NETCONN_EVT_RCVPLUS, q->tot_len);
+      }
+    }
+  }
+
+  return 0; /* do not eat the packet */
+}
+#endif /* LWIP_RAW*/
+
+#if LWIP_UDP
+/**
+ * Receive callback function for UDP netconns.
+ * Posts the packet to conn->recvmbox or deletes it on memory error.
+ *
+ * @see udp.h (struct udp_pcb.recv) for parameters
+ */
+static void
+recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
+   struct ip_addr *addr, u16_t port)
+{
+  struct netbuf *buf;
+  struct netconn *conn;
+#if LWIP_SO_RCVBUF
+  int recv_avail;
+#endif /* LWIP_SO_RCVBUF */
+
+  LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
+  LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
+  LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
+  conn = arg;
+  LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
+
+#if LWIP_SO_RCVBUF
+  SYS_ARCH_GET(conn->recv_avail, recv_avail);
+  if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL) ||
+      ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
+#else  /* LWIP_SO_RCVBUF */
+  if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL)) {
+#endif /* LWIP_SO_RCVBUF */
+    pbuf_free(p);
+    return;
+  }
+
+  buf = memp_malloc(MEMP_NETBUF);
+  if (buf == NULL) {
+    pbuf_free(p);
+    return;
+  } else {
+    buf->p = p;
+    buf->ptr = p;
+    buf->addr = addr;
+    buf->port = port;
+  }
+
+  if (sys_mbox_trypost(conn->recvmbox, buf) != ERR_OK) {
+    netbuf_delete(buf);
+    return;
+  } else {
+    SYS_ARCH_INC(conn->recv_avail, p->tot_len);
+    /* Register event with callback */
+    API_EVENT(conn, NETCONN_EVT_RCVPLUS, p->tot_len);
+  }
+}
+#endif /* LWIP_UDP */
+
+#if LWIP_TCP
+/**
+ * Receive callback function for TCP netconns.
+ * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
+ *
+ * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
+ */
+static err_t
+recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+  struct netconn *conn;
+  u16_t len;
+
+  LWIP_UNUSED_ARG(pcb);
+  LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
+  LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
+  conn = arg;
+  LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
+
+  if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL)) {
+    return ERR_VAL;
+  }
+
+  conn->err = err;
+  if (p != NULL) {
+    len = p->tot_len;
+    SYS_ARCH_INC(conn->recv_avail, len);
+  } else {
+    len = 0;
+  }
+
+  if (sys_mbox_trypost(conn->recvmbox, p) != ERR_OK) {
+    return ERR_MEM;
+  } else {
+    /* Register event with callback */
+    API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
+  }
+
+  return ERR_OK;
+}
+
+/**
+ * Poll callback function for TCP netconns.
+ * Wakes up an application thread that waits for a connection to close
+ * or data to be sent. The application thread then takes the
+ * appropriate action to go on.
+ *
+ * Signals the conn->sem.
+ * netconn_close waits for conn->sem if closing failed.
+ *
+ * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
+ */
+static err_t
+poll_tcp(void *arg, struct tcp_pcb *pcb)
+{
+  struct netconn *conn = arg;
+
+  LWIP_UNUSED_ARG(pcb);
+  LWIP_ASSERT("conn != NULL", (conn != NULL));
+
+  if (conn->state == NETCONN_WRITE) {
+    do_writemore(conn);
+  } else if (conn->state == NETCONN_CLOSE) {
+    do_close_internal(conn);
+  }
+
+  return ERR_OK;
+}
+
+/**
+ * Sent callback function for TCP netconns.
+ * Signals the conn->sem and calls API_EVENT.
+ * netconn_write waits for conn->sem if send buffer is low.
+ *
+ * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
+ */
+static err_t
+sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
+{
+  struct netconn *conn = arg;
+
+  LWIP_UNUSED_ARG(pcb);
+  LWIP_ASSERT("conn != NULL", (conn != NULL));
+
+  if (conn->state == NETCONN_WRITE) {
+    LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
+    do_writemore(conn);
+  } else if (conn->state == NETCONN_CLOSE) {
+    do_close_internal(conn);
+  }
+
+  if (conn) {
+    if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT)) {
+      API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
+    }
+  }
+  
+  return ERR_OK;
+}
+
+/**
+ * Error callback function for TCP netconns.
+ * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
+ * The application thread has then to decide what to do.
+ *
+ * @see tcp.h (struct tcp_pcb.err) for parameters
+ */
+static void
+err_tcp(void *arg, err_t err)
+{
+  struct netconn *conn;
+
+  conn = arg;
+  LWIP_ASSERT("conn != NULL", (conn != NULL));
+
+  conn->pcb.tcp = NULL;
+
+  conn->err = err;
+  if (conn->recvmbox != SYS_MBOX_NULL) {
+    /* Register event with callback */
+    API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
+    sys_mbox_post(conn->recvmbox, NULL);
+  }
+  if (conn->op_completed != SYS_SEM_NULL && conn->state == NETCONN_CONNECT) {
+    conn->state = NETCONN_NONE;
+    sys_sem_signal(conn->op_completed);
+  }
+  if (conn->acceptmbox != SYS_MBOX_NULL) {
+    /* Register event with callback */
+    API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
+    sys_mbox_post(conn->acceptmbox, NULL);
+  }
+  if ((conn->state == NETCONN_WRITE) || (conn->state == NETCONN_CLOSE)) {
+    /* calling do_writemore/do_close_internal is not necessary
+       since the pcb has already been deleted! */
+    conn->state = NETCONN_NONE;
+    /* wake up the waiting task */
+    sys_sem_signal(conn->op_completed);
+  }
+}
+
+/**
+ * Setup a tcp_pcb with the correct callback function pointers
+ * and their arguments.
+ *
+ * @param conn the TCP netconn to setup
+ */
+static void
+setup_tcp(struct netconn *conn)
+{
+  struct tcp_pcb *pcb;
+
+  pcb = conn->pcb.tcp;
+  tcp_arg(pcb, conn);
+  tcp_recv(pcb, recv_tcp);
+  tcp_sent(pcb, sent_tcp);
+  tcp_poll(pcb, poll_tcp, 4);
+  tcp_err(pcb, err_tcp);
+}
+
+/**
+ * Accept callback function for TCP netconns.
+ * Allocates a new netconn and posts that to conn->acceptmbox.
+ *
+ * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
+ */
+static err_t
+accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
+{
+  struct netconn *newconn;
+  struct netconn *conn;
+
+#if API_MSG_DEBUG
+#if TCP_DEBUG
+  tcp_debug_print_state(newpcb->state);
+#endif /* TCP_DEBUG */
+#endif /* API_MSG_DEBUG */
+  conn = (struct netconn *)arg;
+
+  LWIP_ERROR("accept_function: invalid conn->acceptmbox",
+             conn->acceptmbox != SYS_MBOX_NULL, return ERR_VAL;);
+
+  /* We have to set the callback here even though
+   * the new socket is unknown. conn->socket is marked as -1. */
+  newconn = netconn_alloc(conn->type, conn->callback);
+  if (newconn == NULL) {
+    return ERR_MEM;
+  }
+  newconn->pcb.tcp = newpcb;
+  setup_tcp(newconn);
+  newconn->err = err;
+
+  if (sys_mbox_trypost(conn->acceptmbox, newconn) != ERR_OK) {
+    /* When returning != ERR_OK, the connection is aborted in tcp_process(),
+       so do nothing here! */
+    newconn->pcb.tcp = NULL;
+    netconn_free(newconn);
+    return ERR_MEM;
+  } else {
+    /* Register event with callback */
+    API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
+  }
+
+  return ERR_OK;
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Create a new pcb of a specific type.
+ * Called from do_newconn().
+ *
+ * @param msg the api_msg_msg describing the connection type
+ * @return msg->conn->err, but the return value is currently ignored
+ */
+static err_t
+pcb_new(struct api_msg_msg *msg)
+{
+   msg->conn->err = ERR_OK;
+
+   LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
+
+   /* Allocate a PCB for this connection */
+   switch(NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+   case NETCONN_RAW:
+     msg->conn->pcb.raw = raw_new(msg->msg.n.proto);
+     if(msg->conn->pcb.raw == NULL) {
+       msg->conn->err = ERR_MEM;
+       break;
+     }
+     raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
+     break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+   case NETCONN_UDP:
+     msg->conn->pcb.udp = udp_new();
+     if(msg->conn->pcb.udp == NULL) {
+       msg->conn->err = ERR_MEM;
+       break;
+     }
+#if LWIP_UDPLITE
+     if (msg->conn->type==NETCONN_UDPLITE) {
+       udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
+     }
+#endif /* LWIP_UDPLITE */
+     if (msg->conn->type==NETCONN_UDPNOCHKSUM) {
+       udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
+     }
+     udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
+     break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+   case NETCONN_TCP:
+     msg->conn->pcb.tcp = tcp_new();
+     if(msg->conn->pcb.tcp == NULL) {
+       msg->conn->err = ERR_MEM;
+       break;
+     }
+     setup_tcp(msg->conn);
+     break;
+#endif /* LWIP_TCP */
+   default:
+     /* Unsupported netconn type, e.g. protocol disabled */
+     msg->conn->err = ERR_VAL;
+     break;
+   }
+
+  return msg->conn->err;
+}
+
+/**
+ * Create a new pcb of a specific type inside a netconn.
+ * Called from netconn_new_with_proto_and_callback.
+ *
+ * @param msg the api_msg_msg describing the connection type
+ */
+void
+do_newconn(struct api_msg_msg *msg)
+{
+   if(msg->conn->pcb.tcp == NULL) {
+     pcb_new(msg);
+   }
+   /* Else? This "new" connection already has a PCB allocated. */
+   /* Is this an error condition? Should it be deleted? */
+   /* We currently just are happy and return. */
+
+   TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Create a new netconn (of a specific type) that has a callback function.
+ * The corresponding pcb is NOT created!
+ *
+ * @param t the type of 'connection' to create (@see enum netconn_type)
+ * @param proto the IP protocol for RAW IP pcbs
+ * @param callback a function to call on status changes (RX available, TX'ed)
+ * @return a newly allocated struct netconn or
+ *         NULL on memory error
+ */
+struct netconn*
+netconn_alloc(enum netconn_type t, netconn_callback callback)
+{
+  struct netconn *conn;
+  int size;
+
+  conn = memp_malloc(MEMP_NETCONN);
+  if (conn == NULL) {
+    return NULL;
+  }
+
+  conn->err = ERR_OK;
+  conn->type = t;
+  conn->pcb.tcp = NULL;
+
+#if (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_UDP_RECVMBOX_SIZE) && \
+    (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_TCP_RECVMBOX_SIZE)
+  size = DEFAULT_RAW_RECVMBOX_SIZE;
+#else
+  switch(NETCONNTYPE_GROUP(t)) {
+#if LWIP_RAW
+  case NETCONN_RAW:
+    size = DEFAULT_RAW_RECVMBOX_SIZE;
+    break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+  case NETCONN_UDP:
+    size = DEFAULT_UDP_RECVMBOX_SIZE;
+    break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+  case NETCONN_TCP:
+    size = DEFAULT_TCP_RECVMBOX_SIZE;
+    break;
+#endif /* LWIP_TCP */
+  default:
+    LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
+    break;
+  }
+#endif
+
+  if ((conn->op_completed = sys_sem_new(0)) == SYS_SEM_NULL) {
+    memp_free(MEMP_NETCONN, conn);
+    return NULL;
+  }
+  if ((conn->recvmbox = sys_mbox_new(size)) == SYS_MBOX_NULL) {
+    sys_sem_free(conn->op_completed);
+    memp_free(MEMP_NETCONN, conn);
+    return NULL;
+  }
+
+  conn->acceptmbox   = SYS_MBOX_NULL;
+  conn->state        = NETCONN_NONE;
+  /* initialize socket to -1 since 0 is a valid socket */
+  conn->socket       = -1;
+  conn->callback     = callback;
+  conn->recv_avail   = 0;
+#if LWIP_TCP
+  conn->write_msg    = NULL;
+  conn->write_offset = 0;
+#if LWIP_TCPIP_CORE_LOCKING
+  conn->write_delayed = 0;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+#endif /* LWIP_TCP */
+#if LWIP_SO_RCVTIMEO
+  conn->recv_timeout = 0;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+  conn->recv_bufsize = RECV_BUFSIZE_DEFAULT;
+#endif /* LWIP_SO_RCVBUF */
+  return conn;
+}
+
+/**
+ * Delete a netconn and all its resources.
+ * The pcb is NOT freed (since we might not be in the right thread context do this).
+ *
+ * @param conn the netconn to free
+ */
+void
+netconn_free(struct netconn *conn)
+{
+  void *mem;
+  LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
+
+  /* Drain the recvmbox. */
+  if (conn->recvmbox != SYS_MBOX_NULL) {
+    while (sys_mbox_tryfetch(conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
+      if (conn->type == NETCONN_TCP) {
+        if(mem != NULL) {
+          pbuf_free((struct pbuf *)mem);
+        }
+      } else {
+        netbuf_delete((struct netbuf *)mem);
+      }
+    }
+    sys_mbox_free(conn->recvmbox);
+    conn->recvmbox = SYS_MBOX_NULL;
+  }
+
+  /* Drain the acceptmbox. */
+  if (conn->acceptmbox != SYS_MBOX_NULL) {
+    while (sys_mbox_tryfetch(conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
+      netconn_delete((struct netconn *)mem);
+    }
+    sys_mbox_free(conn->acceptmbox);
+    conn->acceptmbox = SYS_MBOX_NULL;
+  }
+
+  sys_sem_free(conn->op_completed);
+  conn->op_completed = SYS_SEM_NULL;
+
+  memp_free(MEMP_NETCONN, conn);
+}
+
+#if LWIP_TCP
+/**
+ * Internal helper function to close a TCP netconn: since this sometimes
+ * doesn't work at the first attempt, this function is called from multiple
+ * places.
+ *
+ * @param conn the TCP netconn to close
+ */
+static void
+do_close_internal(struct netconn *conn)
+{
+  err_t err;
+
+  LWIP_ASSERT("invalid conn", (conn != NULL));
+  LWIP_ASSERT("this is for tcp netconns only", (conn->type == NETCONN_TCP));
+  LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
+  LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
+
+  /* Set back some callback pointers */
+  tcp_arg(conn->pcb.tcp, NULL);
+  if (conn->pcb.tcp->state == LISTEN) {
+    tcp_accept(conn->pcb.tcp, NULL);
+  } else {
+    tcp_recv(conn->pcb.tcp, NULL);
+    tcp_accept(conn->pcb.tcp, NULL);
+    /* some callbacks have to be reset if tcp_close is not successful */
+    tcp_sent(conn->pcb.tcp, NULL);
+    tcp_poll(conn->pcb.tcp, NULL, 4);
+    tcp_err(conn->pcb.tcp, NULL);
+  }
+  /* Try to close the connection */
+  err = tcp_close(conn->pcb.tcp);
+  if (err == ERR_OK) {
+    /* Closing succeeded */
+    conn->state = NETCONN_NONE;
+    /* Set back some callback pointers as conn is going away */
+    conn->pcb.tcp = NULL;
+    conn->err = ERR_OK;
+    /* Trigger select() in socket layer. This send should something else so the
+       errorfd is set, not the read and write fd! */
+    API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
+    API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
+    /* wake up the application task */
+    sys_sem_signal(conn->op_completed);
+  } else {
+    /* Closing failed, restore some of the callbacks */
+    /* Closing of listen pcb will never fail! */
+    LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state != LISTEN));
+    tcp_sent(conn->pcb.tcp, sent_tcp);
+    tcp_poll(conn->pcb.tcp, poll_tcp, 4);
+    tcp_err(conn->pcb.tcp, err_tcp);
+    tcp_arg(conn->pcb.tcp, conn);
+  }
+  /* If closing didn't succeed, we get called again either
+     from poll_tcp or from sent_tcp */
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Delete the pcb inside a netconn.
+ * Called from netconn_delete.
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_delconn(struct api_msg_msg *msg)
+{
+  if (msg->conn->pcb.tcp != NULL) {
+    switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+    case NETCONN_RAW:
+      raw_remove(msg->conn->pcb.raw);
+      break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+    case NETCONN_UDP:
+      msg->conn->pcb.udp->recv_arg = NULL;
+      udp_remove(msg->conn->pcb.udp);
+      break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+    case NETCONN_TCP:
+      msg->conn->state = NETCONN_CLOSE;
+      do_close_internal(msg->conn);
+      /* API_EVENT is called inside do_close_internal, before releasing
+         the application thread, so we can return at this point! */
+      return;
+#endif /* LWIP_TCP */
+    default:
+      break;
+    }
+  }
+  /* tcp netconns don't come here! */
+
+  /* Trigger select() in socket layer. This send should something else so the
+     errorfd is set, not the read and write fd! */
+  API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
+  API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
+
+  if (msg->conn->op_completed != SYS_SEM_NULL) {
+    sys_sem_signal(msg->conn->op_completed);
+  }
+}
+
+/**
+ * Bind a pcb contained in a netconn
+ * Called from netconn_bind.
+ *
+ * @param msg the api_msg_msg pointing to the connection and containing
+ *            the IP address and port to bind to
+ */
+void
+do_bind(struct api_msg_msg *msg)
+{
+  if (!ERR_IS_FATAL(msg->conn->err)) {
+    if (msg->conn->pcb.tcp != NULL) {
+      switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+      case NETCONN_RAW:
+        msg->conn->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
+        break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+      case NETCONN_UDP:
+        msg->conn->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
+        break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+      case NETCONN_TCP:
+        msg->conn->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port);
+        break;
+#endif /* LWIP_TCP */
+      default:
+        break;
+      }
+    } else {
+      /* msg->conn->pcb is NULL */
+      msg->conn->err = ERR_VAL;
+    }
+  }
+  TCPIP_APIMSG_ACK(msg);
+}
+
+#if LWIP_TCP
+/**
+ * TCP callback function if a connection (opened by tcp_connect/do_connect) has
+ * been established (or reset by the remote host).
+ *
+ * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
+ */
+static err_t
+do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+  struct netconn *conn;
+
+  LWIP_UNUSED_ARG(pcb);
+
+  conn = arg;
+
+  if (conn == NULL) {
+    return ERR_VAL;
+  }
+
+  conn->err = err;
+  if ((conn->type == NETCONN_TCP) && (err == ERR_OK)) {
+    setup_tcp(conn);
+  }
+  conn->state = NETCONN_NONE;
+  sys_sem_signal(conn->op_completed);
+  return ERR_OK;
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Connect a pcb contained inside a netconn
+ * Called from netconn_connect.
+ *
+ * @param msg the api_msg_msg pointing to the connection and containing
+ *            the IP address and port to connect to
+ */
+void
+do_connect(struct api_msg_msg *msg)
+{
+  if (msg->conn->pcb.tcp == NULL) {
+    sys_sem_signal(msg->conn->op_completed);
+    return;
+  }
+
+  switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+  case NETCONN_RAW:
+    msg->conn->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
+    sys_sem_signal(msg->conn->op_completed);
+    break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+  case NETCONN_UDP:
+    msg->conn->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
+    sys_sem_signal(msg->conn->op_completed);
+    break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+  case NETCONN_TCP:
+    msg->conn->state = NETCONN_CONNECT;
+    setup_tcp(msg->conn);
+    msg->conn->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port,
+                                 do_connected);
+    /* sys_sem_signal() is called from do_connected (or err_tcp()),
+     * when the connection is established! */
+    break;
+#endif /* LWIP_TCP */
+  default:
+    break;
+  }
+}
+
+/**
+ * Connect a pcb contained inside a netconn
+ * Only used for UDP netconns.
+ * Called from netconn_disconnect.
+ *
+ * @param msg the api_msg_msg pointing to the connection to disconnect
+ */
+void
+do_disconnect(struct api_msg_msg *msg)
+{
+#if LWIP_UDP
+  if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
+    udp_disconnect(msg->conn->pcb.udp);
+  }
+#endif /* LWIP_UDP */
+  TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Set a TCP pcb contained in a netconn into listen mode
+ * Called from netconn_listen.
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_listen(struct api_msg_msg *msg)
+{
+#if LWIP_TCP
+  if (!ERR_IS_FATAL(msg->conn->err)) {
+    if (msg->conn->pcb.tcp != NULL) {
+      if (msg->conn->type == NETCONN_TCP) {
+        if (msg->conn->pcb.tcp->state == CLOSED) {
+#if TCP_LISTEN_BACKLOG
+          struct tcp_pcb* lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
+#else  /* TCP_LISTEN_BACKLOG */
+          struct tcp_pcb* lpcb = tcp_listen(msg->conn->pcb.tcp);
+#endif /* TCP_LISTEN_BACKLOG */
+          if (lpcb == NULL) {
+            msg->conn->err = ERR_MEM;
+          } else {
+            /* delete the recvmbox and allocate the acceptmbox */
+            if (msg->conn->recvmbox != SYS_MBOX_NULL) {
+              /** @todo: should we drain the recvmbox here? */
+              sys_mbox_free(msg->conn->recvmbox);
+              msg->conn->recvmbox = SYS_MBOX_NULL;
+            }
+            if (msg->conn->acceptmbox == SYS_MBOX_NULL) {
+              if ((msg->conn->acceptmbox = sys_mbox_new(DEFAULT_ACCEPTMBOX_SIZE)) == SYS_MBOX_NULL) {
+                msg->conn->err = ERR_MEM;
+              }
+            }
+            if (msg->conn->err == ERR_OK) {
+              msg->conn->state = NETCONN_LISTEN;
+              msg->conn->pcb.tcp = lpcb;
+              tcp_arg(msg->conn->pcb.tcp, msg->conn);
+              tcp_accept(msg->conn->pcb.tcp, accept_function);
+            }
+          }
+        } else {
+          msg->conn->err = ERR_CONN;
+        }
+      }
+    }
+  }
+#endif /* LWIP_TCP */
+  TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Send some data on a RAW or UDP pcb contained in a netconn
+ * Called from netconn_send
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_send(struct api_msg_msg *msg)
+{
+  if (!ERR_IS_FATAL(msg->conn->err)) {
+    if (msg->conn->pcb.tcp != NULL) {
+      switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+      case NETCONN_RAW:
+        if (msg->msg.b->addr == NULL) {
+          msg->conn->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
+        } else {
+          msg->conn->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, msg->msg.b->addr);
+        }
+        break;
+#endif
+#if LWIP_UDP
+      case NETCONN_UDP:
+        if (msg->msg.b->addr == NULL) {
+          msg->conn->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
+        } else {
+          msg->conn->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, msg->msg.b->addr, msg->msg.b->port);
+        }
+        break;
+#endif /* LWIP_UDP */
+      default:
+        break;
+      }
+    }
+  }
+  TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Indicate data has been received from a TCP pcb contained in a netconn
+ * Called from netconn_recv
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_recv(struct api_msg_msg *msg)
+{
+#if LWIP_TCP
+  if (!ERR_IS_FATAL(msg->conn->err)) {
+    if (msg->conn->pcb.tcp != NULL) {
+      if (msg->conn->type == NETCONN_TCP) {
+#if TCP_LISTEN_BACKLOG
+        if (msg->conn->pcb.tcp->state == LISTEN) {
+          tcp_accepted(msg->conn->pcb.tcp);
+        } else
+#endif /* TCP_LISTEN_BACKLOG */
+        {
+          tcp_recved(msg->conn->pcb.tcp, msg->msg.r.len);
+        }
+      }
+    }
+  }
+#endif /* LWIP_TCP */
+  TCPIP_APIMSG_ACK(msg);
+}
+
+#if LWIP_TCP
+/**
+ * See if more data needs to be written from a previous call to netconn_write.
+ * Called initially from do_write. If the first call can't send all data
+ * (because of low memory or empty send-buffer), this function is called again
+ * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
+ * blocking application thread (waiting in netconn_write) is released.
+ *
+ * @param conn netconn (that is currently in state NETCONN_WRITE) to process
+ * @return ERR_OK
+ *         ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
+ */
+static err_t
+do_writemore(struct netconn *conn)
+{
+  err_t err;
+  void *dataptr;
+  u16_t len, available;
+  u8_t write_finished = 0;
+  size_t diff;
+
+  LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
+
+  dataptr = (u8_t*)conn->write_msg->msg.w.dataptr + conn->write_offset;
+  diff = conn->write_msg->msg.w.len - conn->write_offset;
+  if (diff > 0xffffUL) { /* max_u16_t */
+    len = 0xffff;
+#if LWIP_TCPIP_CORE_LOCKING
+    conn->write_delayed = 1;
+#endif
+  } else {
+    len = (u16_t)diff;
+  }
+  available = tcp_sndbuf(conn->pcb.tcp);
+  if (available < len) {
+    /* don't try to write more than sendbuf */
+    len = available;
+#if LWIP_TCPIP_CORE_LOCKING
+    conn->write_delayed = 1;
+#endif
+  }
+
+  err = tcp_write(conn->pcb.tcp, dataptr, len, conn->write_msg->msg.w.apiflags);
+  LWIP_ASSERT("do_writemore: invalid length!", ((conn->write_offset + len) <= conn->write_msg->msg.w.len));
+  if (err == ERR_OK) {
+    conn->write_offset += len;
+    if (conn->write_offset == conn->write_msg->msg.w.len) {
+      /* everything was written */
+      write_finished = 1;
+      conn->write_msg = NULL;
+      conn->write_offset = 0;
+      /* API_EVENT might call tcp_tmr, so reset conn->state now */
+      conn->state = NETCONN_NONE;
+    }
+    err = tcp_output_nagle(conn->pcb.tcp);
+    conn->err = err;
+    if ((err == ERR_OK) && (tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT)) {
+      API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
+    }
+  } else if (err == ERR_MEM) {
+    /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called
+       we do NOT return to the application thread, since ERR_MEM is
+       only a temporary error! */
+
+    /* tcp_enqueue returned ERR_MEM, try tcp_output anyway */
+    err = tcp_output(conn->pcb.tcp);
+
+#if LWIP_TCPIP_CORE_LOCKING
+    conn->write_delayed = 1;
+#endif
+  } else {
+    /* On errors != ERR_MEM, we don't try writing any more but return
+       the error to the application thread. */
+    conn->err = err;
+    write_finished = 1;
+  }
+
+  if (write_finished) {
+    /* everything was written: set back connection state
+       and back to application task */
+    conn->state = NETCONN_NONE;
+#if LWIP_TCPIP_CORE_LOCKING
+    if (conn->write_delayed != 0)
+#endif
+    {
+      sys_sem_signal(conn->op_completed);
+    }
+  }
+#if LWIP_TCPIP_CORE_LOCKING
+  else
+    return ERR_MEM;
+#endif
+  return ERR_OK;
+}
+#endif /* LWIP_TCP */
+
+/**
+ * Send some data on a TCP pcb contained in a netconn
+ * Called from netconn_write
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_write(struct api_msg_msg *msg)
+{
+  if (!ERR_IS_FATAL(msg->conn->err)) {
+    if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
+#if LWIP_TCP
+      msg->conn->state = NETCONN_WRITE;
+      /* set all the variables used by do_writemore */
+      LWIP_ASSERT("already writing", msg->conn->write_msg == NULL &&
+        msg->conn->write_offset == 0);
+      msg->conn->write_msg = msg;
+      msg->conn->write_offset = 0;
+#if LWIP_TCPIP_CORE_LOCKING
+      msg->conn->write_delayed = 0;
+      if (do_writemore(msg->conn) != ERR_OK) {
+        LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
+        UNLOCK_TCPIP_CORE();
+        sys_arch_sem_wait(msg->conn->op_completed, 0);
+        LOCK_TCPIP_CORE();
+        LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
+      }
+#else
+      do_writemore(msg->conn);
+#endif
+      /* for both cases: if do_writemore was called, don't ACK the APIMSG! */
+      return;
+#endif /* LWIP_TCP */
+#if (LWIP_UDP || LWIP_RAW)
+    } else {
+      msg->conn->err = ERR_VAL;
+#endif /* (LWIP_UDP || LWIP_RAW) */
+    }
+  }
+  TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Return a connection's local or remote address
+ * Called from netconn_getaddr
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_getaddr(struct api_msg_msg *msg)
+{
+  if (msg->conn->pcb.ip != NULL) {
+    *(msg->msg.ad.ipaddr) = (msg->msg.ad.local?msg->conn->pcb.ip->local_ip:msg->conn->pcb.ip->remote_ip);
+    
+    switch (NETCONNTYPE_GROUP(msg->conn->type)) {
+#if LWIP_RAW
+    case NETCONN_RAW:
+      if (msg->msg.ad.local) {
+        *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
+      } else {
+        /* return an error as connecting is only a helper for upper layers */
+        msg->conn->err = ERR_CONN;
+      }
+      break;
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+    case NETCONN_UDP:
+      if (msg->msg.ad.local) {
+        *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
+      } else {
+        if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
+          msg->conn->err = ERR_CONN;
+        } else {
+          *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
+        }
+      }
+      break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+    case NETCONN_TCP:
+      *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port);
+      break;
+#endif /* LWIP_TCP */
+    }
+  } else {
+    msg->conn->err = ERR_CONN;
+  }
+  TCPIP_APIMSG_ACK(msg);
+}
+
+/**
+ * Close a TCP pcb contained in a netconn
+ * Called from netconn_close
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_close(struct api_msg_msg *msg)
+{
+#if LWIP_TCP
+  if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
+      msg->conn->state = NETCONN_CLOSE;
+      do_close_internal(msg->conn);
+      /* for tcp netconns, do_close_internal ACKs the message */
+  } else
+#endif /* LWIP_TCP */
+  {
+    msg->conn->err = ERR_VAL;
+    TCPIP_APIMSG_ACK(msg);
+  }
+}
+
+#if LWIP_IGMP
+/**
+ * Join multicast groups for UDP netconns.
+ * Called from netconn_join_leave_group
+ *
+ * @param msg the api_msg_msg pointing to the connection
+ */
+void
+do_join_leave_group(struct api_msg_msg *msg)
+{ 
+  if (!ERR_IS_FATAL(msg->conn->err)) {
+    if (msg->conn->pcb.tcp != NULL) {
+      if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
+#if LWIP_UDP
+        if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
+          msg->conn->err = igmp_joingroup(msg->msg.jl.interface, msg->msg.jl.multiaddr);
+        } else {
+          msg->conn->err = igmp_leavegroup(msg->msg.jl.interface, msg->msg.jl.multiaddr);
+        }
+#endif /* LWIP_UDP */
+#if (LWIP_TCP || LWIP_RAW)
+      } else {
+        msg->conn->err = ERR_VAL;
+#endif /* (LWIP_TCP || LWIP_RAW) */
+      }
+    }
+  }
+  TCPIP_APIMSG_ACK(msg);
+}
+#endif /* LWIP_IGMP */
+
+#if LWIP_DNS
+/**
+ * Callback function that is called when DNS name is resolved
+ * (or on timeout). A waiting application thread is waked up by
+ * signaling the semaphore.
+ */
+static void
+do_dns_found(const char *name, struct ip_addr *ipaddr, void *arg)
+{
+  struct dns_api_msg *msg = (struct dns_api_msg*)arg;
+
+  LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0);
+
+  if (ipaddr == NULL) {
+    /* timeout or memory error */
+    *msg->err = ERR_VAL;
+  } else {
+    /* address was resolved */
+    *msg->err = ERR_OK;
+    *msg->addr = *ipaddr;
+  }
+  /* wake up the application task waiting in netconn_gethostbyname */
+  sys_sem_signal(msg->sem);
+}
+
+/**
+ * Execute a DNS query
+ * Called from netconn_gethostbyname
+ *
+ * @param arg the dns_api_msg pointing to the query
+ */
+void
+do_gethostbyname(void *arg)
+{
+  struct dns_api_msg *msg = (struct dns_api_msg*)arg;
+
+  *msg->err = dns_gethostbyname(msg->name, msg->addr, do_dns_found, msg);
+  if (*msg->err != ERR_INPROGRESS) {
+    /* on error or immediate success, wake up the application
+     * task waiting in netconn_gethostbyname */
+    sys_sem_signal(msg->sem);
+  }
+}
+#endif /* LWIP_DNS */
+
+#endif /* LWIP_NETCONN */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/err.c b/firmware/x300/lwip/lwip-1.3.1/src/api/err.c
new file mode 100644
index 000000000..a90cb98c8
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/err.c
@@ -0,0 +1,74 @@
+/**
+ * @file
+ * Error Management module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/err.h"
+
+#ifdef LWIP_DEBUG
+
+static const char *err_strerr[] = {
+           "Ok.",                    /* ERR_OK          0  */
+           "Out of memory error.",   /* ERR_MEM        -1  */
+           "Buffer error.",          /* ERR_BUF        -2  */
+           "Timeout.",               /* ERR_TIMEOUT    -3 */
+           "Routing problem.",       /* ERR_RTE        -4  */
+           "Connection aborted.",    /* ERR_ABRT       -5  */
+           "Connection reset.",      /* ERR_RST        -6  */
+           "Connection closed.",     /* ERR_CLSD       -7  */
+           "Not connected.",         /* ERR_CONN       -8  */
+           "Illegal value.",         /* ERR_VAL        -9  */
+           "Illegal argument.",      /* ERR_ARG        -10 */
+           "Address in use.",        /* ERR_USE        -11 */
+           "Low-level netif error.", /* ERR_IF         -12 */
+           "Already connected.",     /* ERR_ISCONN     -13 */
+           "Operation in progress."  /* ERR_INPROGRESS -14 */
+};
+
+/**
+ * Convert an lwip internal error to a string representation.
+ *
+ * @param err an lwip internal err_t
+ * @return a string representation for err
+ */
+const char *
+lwip_strerr(err_t err)
+{
+  return err_strerr[-err];
+
+}
+
+#endif /* LWIP_DEBUG */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/netbuf.c b/firmware/x300/lwip/lwip-1.3.1/src/api/netbuf.c
new file mode 100644
index 000000000..af44eefc7
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/netbuf.c
@@ -0,0 +1,235 @@
+/**
+ * @file
+ * Network buffer management
+ *
+ */
+ 
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netbuf.h"
+#include "lwip/memp.h"
+
+#include <string.h>
+
+/**
+ * Create (allocate) and initialize a new netbuf.
+ * The netbuf doesn't yet contain a packet buffer!
+ *
+ * @return a pointer to a new netbuf
+ *         NULL on lack of memory
+ */
+struct
+netbuf *netbuf_new(void)
+{
+  struct netbuf *buf;
+
+  buf = memp_malloc(MEMP_NETBUF);
+  if (buf != NULL) {
+    buf->p = NULL;
+    buf->ptr = NULL;
+    buf->addr = NULL;
+    return buf;
+  } else {
+    return NULL;
+  }
+}
+
+/**
+ * Deallocate a netbuf allocated by netbuf_new().
+ *
+ * @param buf pointer to a netbuf allocated by netbuf_new()
+ */
+void
+netbuf_delete(struct netbuf *buf)
+{
+  if (buf != NULL) {
+    if (buf->p != NULL) {
+      pbuf_free(buf->p);
+      buf->p = buf->ptr = NULL;
+    }
+    memp_free(MEMP_NETBUF, buf);
+  }
+}
+
+/**
+ * Allocate memory for a packet buffer for a given netbuf.
+ *
+ * @param buf the netbuf for which to allocate a packet buffer
+ * @param size the size of the packet buffer to allocate
+ * @return pointer to the allocated memory
+ *         NULL if no memory could be allocated
+ */
+void *
+netbuf_alloc(struct netbuf *buf, u16_t size)
+{
+  LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;);
+
+  /* Deallocate any previously allocated memory. */
+  if (buf->p != NULL) {
+    pbuf_free(buf->p);
+  }
+  buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
+  if (buf->p == NULL) {
+     return NULL;
+  }
+  LWIP_ASSERT("check that first pbuf can hold size",
+             (buf->p->len >= size));
+  buf->ptr = buf->p;
+  return buf->p->payload;
+}
+
+/**
+ * Free the packet buffer included in a netbuf
+ *
+ * @param buf pointer to the netbuf which contains the packet buffer to free
+ */
+void
+netbuf_free(struct netbuf *buf)
+{
+  LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
+  if (buf->p != NULL) {
+    pbuf_free(buf->p);
+  }
+  buf->p = buf->ptr = NULL;
+}
+
+/**
+ * Let a netbuf reference existing (non-volatile) data.
+ *
+ * @param buf netbuf which should reference the data
+ * @param dataptr pointer to the data to reference
+ * @param size size of the data
+ * @return ERR_OK if data is referenced
+ *         ERR_MEM if data couldn't be referenced due to lack of memory
+ */
+err_t
+netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size)
+{
+  LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;);
+  if (buf->p != NULL) {
+    pbuf_free(buf->p);
+  }
+  buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
+  if (buf->p == NULL) {
+    buf->ptr = NULL;
+    return ERR_MEM;
+  }
+  buf->p->payload = (void*)dataptr;
+  buf->p->len = buf->p->tot_len = size;
+  buf->ptr = buf->p;
+  return ERR_OK;
+}
+
+/**
+ * Chain one netbuf to another (@see pbuf_chain)
+ *
+ * @param head the first netbuf
+ * @param tail netbuf to chain after head, freed by this function, may not be reference after returning
+ */
+void
+netbuf_chain(struct netbuf *head, struct netbuf *tail)
+{
+  LWIP_ERROR("netbuf_ref: invalid head", (head != NULL), return;);
+  LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;);
+  pbuf_cat(head->p, tail->p);
+  head->ptr = head->p;
+  memp_free(MEMP_NETBUF, tail);
+}
+
+/**
+ * Get the data pointer and length of the data inside a netbuf.
+ *
+ * @param buf netbuf to get the data from
+ * @param dataptr pointer to a void pointer where to store the data pointer
+ * @param len pointer to an u16_t where the length of the data is stored
+ * @return ERR_OK if the information was retreived,
+ *         ERR_BUF on error.
+ */
+err_t
+netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
+{
+  LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;);
+  LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;);
+  LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;);
+
+  if (buf->ptr == NULL) {
+    return ERR_BUF;
+  }
+  *dataptr = buf->ptr->payload;
+  *len = buf->ptr->len;
+  return ERR_OK;
+}
+
+/**
+ * Move the current data pointer of a packet buffer contained in a netbuf
+ * to the next part.
+ * The packet buffer itself is not modified.
+ *
+ * @param buf the netbuf to modify
+ * @return -1 if there is no next part
+ *         1  if moved to the next part but now there is no next part
+ *         0  if moved to the next part and there are still more parts
+ */
+s8_t
+netbuf_next(struct netbuf *buf)
+{
+  LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return -1;);
+  if (buf->ptr->next == NULL) {
+    return -1;
+  }
+  buf->ptr = buf->ptr->next;
+  if (buf->ptr->next == NULL) {
+    return 1;
+  }
+  return 0;
+}
+
+/**
+ * Move the current data pointer of a packet buffer contained in a netbuf
+ * to the beginning of the packet.
+ * The packet buffer itself is not modified.
+ *
+ * @param buf the netbuf to modify
+ */
+void
+netbuf_first(struct netbuf *buf)
+{
+  LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;);
+  buf->ptr = buf->p;
+}
+
+#endif /* LWIP_NETCONN */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/netdb.c b/firmware/x300/lwip/lwip-1.3.1/src/api/netdb.c
new file mode 100644
index 000000000..8aa237f4c
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/netdb.c
@@ -0,0 +1,356 @@
+/**
+ * @file
+ * API functions for name resolving
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Simon Goldschmidt
+ *
+ */
+
+#include "lwip/netdb.h"
+
+#if LWIP_DNS && LWIP_SOCKET
+
+#include "lwip/err.h"
+#include "lwip/mem.h"
+#include "lwip/ip_addr.h"
+#include "lwip/api.h"
+
+#include <string.h>
+#include <stdlib.h>
+
+/** helper struct for gethostbyname_r to access the char* buffer */
+struct gethostbyname_r_helper {
+  struct ip_addr *addrs;
+  struct ip_addr addr;
+  char *aliases;
+};
+
+/** h_errno is exported in netdb.h for access by applications. */
+#if LWIP_DNS_API_DECLARE_H_ERRNO
+int h_errno;
+#endif /* LWIP_DNS_API_DECLARE_H_ERRNO */
+
+/** define "hostent" variables storage: 0 if we use a static (but unprotected)
+ * set of variables for lwip_gethostbyname, 1 if we use a local storage */
+#ifndef LWIP_DNS_API_HOSTENT_STORAGE
+#define LWIP_DNS_API_HOSTENT_STORAGE 0
+#endif
+
+/** define "hostent" variables storage */
+#if LWIP_DNS_API_HOSTENT_STORAGE
+#define HOSTENT_STORAGE
+#else
+#define HOSTENT_STORAGE static
+#endif /* LWIP_DNS_API_STATIC_HOSTENT */
+
+/**
+ * Returns an entry containing addresses of address family AF_INET
+ * for the host with name name.
+ * Due to dns_gethostbyname limitations, only one address is returned.
+ *
+ * @param name the hostname to resolve
+ * @return an entry containing addresses of address family AF_INET
+ *         for the host with name name
+ */
+struct hostent*
+lwip_gethostbyname(const char *name)
+{
+  err_t err;
+  struct ip_addr addr;
+
+  /* buffer variables for lwip_gethostbyname() */
+  HOSTENT_STORAGE struct hostent s_hostent;
+  HOSTENT_STORAGE char *s_aliases;
+  HOSTENT_STORAGE struct ip_addr s_hostent_addr;
+  HOSTENT_STORAGE struct ip_addr *s_phostent_addr;
+
+  /* query host IP address */
+  err = netconn_gethostbyname(name, &addr);
+  if (err != ERR_OK) {
+    LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
+    h_errno = HOST_NOT_FOUND;
+    return NULL;
+  }
+
+  /* fill hostent */
+  s_hostent_addr = addr;
+  s_phostent_addr = &s_hostent_addr;
+  s_hostent.h_name = (char*)name;
+  s_hostent.h_aliases = &s_aliases;
+  s_hostent.h_addrtype = AF_INET;
+  s_hostent.h_length = sizeof(struct ip_addr);
+  s_hostent.h_addr_list = (char**)&s_phostent_addr;
+
+#if DNS_DEBUG
+  /* dump hostent */
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_name           == %s\n", s_hostent.h_name));
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases        == %p\n", s_hostent.h_aliases));
+  if (s_hostent.h_aliases != NULL) {
+    u8_t idx;
+    for ( idx=0; s_hostent.h_aliases[idx]; idx++) {
+      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases[%i]->   == %p\n", idx, s_hostent.h_aliases[idx]));
+      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases[%i]->   == %s\n",      idx, s_hostent.h_aliases[idx]));
+    }
+  }
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addrtype       == %d\n", s_hostent.h_addrtype));
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_length         == %d\n", s_hostent.h_length));
+  LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list      == %p\n", s_hostent.h_addr_list));
+  if (s_hostent.h_addr_list != NULL) {
+    u8_t idx;
+    for ( idx=0; s_hostent.h_addr_list[idx]; idx++) {
+      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]   == %p\n", idx, s_hostent.h_addr_list[idx]));
+      LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]-> == %s\n", idx, inet_ntoa(*((struct in_addr*)(s_hostent.h_addr_list[idx])))));
+    }
+  }
+#endif /* DNS_DEBUG */
+
+#if LWIP_DNS_API_HOSTENT_STORAGE
+  /* this function should return the "per-thread" hostent after copy from s_hostent */
+  return sys_thread_hostent(&s_hostent);
+#else
+  return &s_hostent;
+#endif /* LWIP_DNS_API_HOSTENT_STORAGE */
+}
+
+/**
+ * Thread-safe variant of lwip_gethostbyname: instead of using a static
+ * buffer, this function takes buffer and errno pointers as arguments
+ * and uses these for the result.
+ *
+ * @param name the hostname to resolve
+ * @param ret pre-allocated struct where to store the result
+ * @param buf pre-allocated buffer where to store additional data
+ * @param buflen the size of buf
+ * @param result pointer to a hostent pointer that is set to ret on success
+ *               and set to zero on error
+ * @param h_errnop pointer to an int where to store errors (instead of modifying
+ *                 the global h_errno)
+ * @return 0 on success, non-zero on error, additional error information
+ *         is stored in *h_errnop instead of h_errno to be thread-safe
+ */
+int
+lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
+                size_t buflen, struct hostent **result, int *h_errnop)
+{
+  err_t err;
+  struct gethostbyname_r_helper *h;
+  char *hostname;
+  size_t namelen;
+  int lh_errno;
+
+  if (h_errnop == NULL) {
+    /* ensure h_errnop is never NULL */
+    h_errnop = &lh_errno;
+  }
+
+  if (result == NULL) {
+    /* not all arguments given */
+    *h_errnop = EINVAL;
+    return -1;
+  }
+  /* first thing to do: set *result to nothing */
+  *result = NULL;
+  if ((name == NULL) || (ret == NULL) || (buf == 0)) {
+    /* not all arguments given */
+    *h_errnop = EINVAL;
+    return -1;
+  }
+
+  namelen = strlen(name);
+  if (buflen < (sizeof(struct gethostbyname_r_helper) + namelen + 1 + (MEM_ALIGNMENT - 1))) {
+    /* buf can't hold the data needed + a copy of name */
+    *h_errnop = ERANGE;
+    return -1;
+  }
+
+  h = (struct gethostbyname_r_helper*)LWIP_MEM_ALIGN(buf);
+  hostname = ((char*)h) + sizeof(struct gethostbyname_r_helper);
+
+  /* query host IP address */
+  err = netconn_gethostbyname(name, &(h->addr));
+  if (err != ERR_OK) {
+    LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err));
+    *h_errnop = ENSRNOTFOUND;
+    return -1;
+  }
+
+  /* copy the hostname into buf */
+  MEMCPY(hostname, name, namelen);
+  hostname[namelen] = 0;
+
+  /* fill hostent */
+  h->addrs = &(h->addr);
+  h->aliases = NULL;
+  ret->h_name = (char*)hostname;
+  ret->h_aliases = &(h->aliases);
+  ret->h_addrtype = AF_INET;
+  ret->h_length = sizeof(struct ip_addr);
+  ret->h_addr_list = (char**)&(h->addrs);
+
+  /* set result != NULL */
+  *result = ret;
+
+  /* return success */
+  return 0;
+}
+
+/**
+ * Frees one or more addrinfo structures returned by getaddrinfo(), along with
+ * any additional storage associated with those structures. If the ai_next field
+ * of the structure is not null, the entire list of structures is freed.
+ *
+ * @param ai struct addrinfo to free
+ */
+void
+lwip_freeaddrinfo(struct addrinfo *ai)
+{
+  struct addrinfo *next;
+
+  while (ai != NULL) {
+    if (ai->ai_addr != NULL) {
+      mem_free(ai->ai_addr);
+    }
+    if (ai->ai_canonname != NULL) {
+      mem_free(ai->ai_canonname);
+    }
+    next = ai->ai_next;
+    mem_free(ai);
+    ai = next;
+  }
+}
+
+/**
+ * Translates the name of a service location (for example, a host name) and/or
+ * a service name and returns a set of socket addresses and associated
+ * information to be used in creating a socket with which to address the
+ * specified service.
+ * Memory for the result is allocated internally and must be freed by calling
+ * lwip_freeaddrinfo()!
+ *
+ * Due to a limitation in dns_gethostbyname, only the first address of a
+ * host is returned.
+ * Also, service names are not supported (only port numbers)!
+ *
+ * @param nodename descriptive name or address string of the host
+ *                 (may be NULL -> local address)
+ * @param servname port number as string of NULL 
+ * @param hints structure containing input values that set socktype and protocol
+ * @param res pointer to a pointer where to store the result (set to NULL on failure)
+ * @return 0 on success, non-zero on failure
+ */
+int
+lwip_getaddrinfo(const char *nodename, const char *servname,
+       const struct addrinfo *hints, struct addrinfo **res)
+{
+  err_t err;
+  struct ip_addr addr;
+  struct addrinfo *ai;
+  struct sockaddr_in *sa = NULL;
+  int port_nr = 0;
+
+  if (res == NULL) {
+    return EAI_FAIL;
+  }
+  *res = NULL;
+  if ((nodename == NULL) && (servname == NULL)) {
+    return EAI_NONAME;
+  }
+
+  if (servname != NULL) {
+    /* service name specified: convert to port number
+     * @todo?: currently, only ASCII integers (port numbers) are supported! */
+    port_nr = atoi(servname);
+    if ((port_nr <= 0) || (port_nr > 0xffff)) {
+      return EAI_SERVICE;
+    }
+  }
+
+  if (nodename != NULL) {
+    /* service location specified, try to resolve */
+    err = netconn_gethostbyname(nodename, &addr);
+    if (err != ERR_OK) {
+      return EAI_FAIL;
+    }
+  } else {
+    /* service location specified, use loopback address */
+    addr.addr = INADDR_LOOPBACK;
+  }
+
+  ai = mem_malloc(sizeof(struct addrinfo));
+  if (ai == NULL) {
+    goto memerr;
+  }
+  memset(ai, 0, sizeof(struct addrinfo));
+  sa = mem_malloc(sizeof(struct sockaddr_in));
+  if (sa == NULL) {
+    goto memerr;
+  }
+  memset(sa, 0, sizeof(struct sockaddr_in));
+  /* set up sockaddr */
+  sa->sin_addr.s_addr = addr.addr;
+  sa->sin_family = AF_INET;
+  sa->sin_len = sizeof(struct sockaddr_in);
+  sa->sin_port = htons(port_nr);
+
+  /* set up addrinfo */
+  ai->ai_family = AF_INET;
+  if (hints != NULL) {
+    /* copy socktype & protocol from hints if specified */
+    ai->ai_socktype = hints->ai_socktype;
+    ai->ai_protocol = hints->ai_protocol;
+  }
+  if (nodename != NULL) {
+    /* copy nodename to canonname if specified */
+    size_t namelen = strlen(nodename);
+    LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1);
+    ai->ai_canonname = mem_malloc((mem_size_t)(namelen + 1));
+    if (ai->ai_canonname == NULL) {
+      goto memerr;
+    }
+    MEMCPY(ai->ai_canonname, nodename, namelen);
+    ai->ai_canonname[namelen] = 0;
+  }
+  ai->ai_addrlen = sizeof(struct sockaddr_in);
+  ai->ai_addr = (struct sockaddr*)sa;
+
+  *res = ai;
+
+  return 0;
+memerr:
+  if (ai != NULL) {
+    mem_free(ai);
+  }
+  if (sa != NULL) {
+    mem_free(sa);
+  }
+  return EAI_MEMORY;
+}
+
+#endif /* LWIP_DNS && LWIP_SOCKET */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/netifapi.c b/firmware/x300/lwip/lwip-1.3.1/src/api/netifapi.c
new file mode 100644
index 000000000..491837378
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/netifapi.c
@@ -0,0 +1,126 @@
+/**
+ * @file
+ * Network Interface Sequential API module
+ *
+ */
+
+/*
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netifapi.h"
+#include "lwip/tcpip.h"
+
+/**
+ * Call netif_add() inside the tcpip_thread context.
+ */
+void
+do_netifapi_netif_add( struct netifapi_msg_msg *msg)
+{
+  if (!netif_add( msg->netif,
+                  msg->msg.add.ipaddr,
+                  msg->msg.add.netmask,
+                  msg->msg.add.gw,
+                  msg->msg.add.state,
+                  msg->msg.add.init,
+                  msg->msg.add.input)) {
+    msg->err = ERR_IF;
+  } else {
+    msg->err = ERR_OK;
+  }
+  TCPIP_NETIFAPI_ACK(msg);
+}
+
+/**
+ * Call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) inside the
+ * tcpip_thread context.
+ */
+void
+do_netifapi_netif_common( struct netifapi_msg_msg *msg)
+{
+  if (msg->msg.common.errtfunc!=NULL) {
+    msg->err =
+    msg->msg.common.errtfunc(msg->netif);
+  } else {
+    msg->err = ERR_OK;
+    msg->msg.common.voidfunc(msg->netif);
+  }
+  TCPIP_NETIFAPI_ACK(msg);
+}
+
+/**
+ * Call netif_add() in a thread-safe way by running that function inside the
+ * tcpip_thread context.
+ *
+ * @note for params @see netif_add()
+ */
+err_t
+netifapi_netif_add(struct netif *netif,
+                   struct ip_addr *ipaddr,
+                   struct ip_addr *netmask,
+                   struct ip_addr *gw,
+                   void *state,
+                   err_t (* init)(struct netif *netif),
+                   err_t (* input)(struct pbuf *p, struct netif *netif))
+{
+  struct netifapi_msg msg;
+  msg.function = do_netifapi_netif_add;
+  msg.msg.netif = netif;
+  msg.msg.msg.add.ipaddr  = ipaddr;
+  msg.msg.msg.add.netmask = netmask;
+  msg.msg.msg.add.gw      = gw;
+  msg.msg.msg.add.state   = state;
+  msg.msg.msg.add.init    = init;
+  msg.msg.msg.add.input   = input;
+  TCPIP_NETIFAPI(&msg);
+  return msg.msg.err;
+}
+
+/**
+ * call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) in a thread-safe
+ * way by running that function inside the tcpip_thread context.
+ *
+ * @note use only for functions where there is only "netif" parameter.
+ */
+err_t
+netifapi_netif_common( struct netif *netif,
+                       void  (* voidfunc)(struct netif *netif),
+                       err_t (* errtfunc)(struct netif *netif) )
+{
+  struct netifapi_msg msg;
+  msg.function = do_netifapi_netif_common;
+  msg.msg.netif = netif;
+  msg.msg.msg.common.voidfunc = voidfunc;
+  msg.msg.msg.common.errtfunc = errtfunc;
+  TCPIP_NETIFAPI(&msg);
+  return msg.msg.err;
+}
+
+#endif /* LWIP_NETIF_API */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/sockets.c b/firmware/x300/lwip/lwip-1.3.1/src/api/sockets.c
new file mode 100644
index 000000000..f177261e1
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/sockets.c
@@ -0,0 +1,1970 @@
+/**
+ * @file
+ * Sockets BSD-Like API module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ * Improved by Marc Boucher <marc@mbsi.ca> and David Haas <dhaas@alum.rpi.edu>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sockets.h"
+#include "lwip/api.h"
+#include "lwip/sys.h"
+#include "lwip/igmp.h"
+#include "lwip/inet.h"
+#include "lwip/tcp.h"
+#include "lwip/raw.h"
+#include "lwip/udp.h"
+#include "lwip/tcpip.h"
+
+#include <string.h>
+
+#define NUM_SOCKETS MEMP_NUM_NETCONN
+
+/** Contains all internal pointers and states used for a socket */
+struct lwip_socket {
+  /** sockets currently are built on netconns, each socket has one netconn */
+  struct netconn *conn;
+  /** data that was left from the previous read */
+  struct netbuf *lastdata;
+  /** offset in the data that was left from the previous read */
+  u16_t lastoffset;
+  /** number of times data was received, set by event_callback(),
+      tested by the receive and select functions */
+  s16_t rcvevent;
+  /** number of times data was received, set by event_callback(),
+      tested by select */
+  u16_t sendevent;
+  /** socket flags (currently, only used for O_NONBLOCK) */
+  u16_t flags;
+  /** last error that occurred on this socket */
+  int err;
+};
+
+/** Description for a task waiting in select */
+struct lwip_select_cb {
+  /** Pointer to the next waiting task */
+  struct lwip_select_cb *next;
+  /** readset passed to select */
+  fd_set *readset;
+  /** writeset passed to select */
+  fd_set *writeset;
+  /** unimplemented: exceptset passed to select */
+  fd_set *exceptset;
+  /** don't signal the same semaphore twice: set to 1 when signalled */
+  int sem_signalled;
+  /** semaphore to wake up a task waiting for select */
+  sys_sem_t sem;
+};
+
+/** This struct is used to pass data to the set/getsockopt_internal
+ * functions running in tcpip_thread context (only a void* is allowed) */
+struct lwip_setgetsockopt_data {
+  /** socket struct for which to change options */
+  struct lwip_socket *sock;
+  /** socket index for which to change options */
+  int s;
+  /** level of the option to process */
+  int level;
+  /** name of the option to process */
+  int optname;
+  /** set: value to set the option to
+    * get: value of the option is stored here */
+  void *optval;
+  /** size of *optval */
+  socklen_t *optlen;
+  /** if an error occures, it is temporarily stored here */
+  err_t err;
+};
+
+/** The global array of available sockets */
+static struct lwip_socket sockets[NUM_SOCKETS];
+/** The global list of tasks waiting for select */
+static struct lwip_select_cb *select_cb_list;
+
+/** Semaphore protecting the sockets array */
+static sys_sem_t socksem;
+/** Semaphore protecting select_cb_list */
+static sys_sem_t selectsem;
+
+/** Table to quickly map an lwIP error (err_t) to a socket error
+  * by using -err as an index */
+static const int err_to_errno_table[] = {
+  0,             /* ERR_OK          0      No error, everything OK. */
+  ENOMEM,        /* ERR_MEM        -1      Out of memory error.     */
+  ENOBUFS,       /* ERR_BUF        -2      Buffer error.            */
+  ETIMEDOUT,     /* ERR_TIMEOUT    -3      Timeout                  */
+  EHOSTUNREACH,  /* ERR_RTE        -4      Routing problem.         */
+  ECONNABORTED,  /* ERR_ABRT       -5      Connection aborted.      */
+  ECONNRESET,    /* ERR_RST        -6      Connection reset.        */
+  ESHUTDOWN,     /* ERR_CLSD       -7      Connection closed.       */
+  ENOTCONN,      /* ERR_CONN       -8      Not connected.           */
+  EINVAL,        /* ERR_VAL        -9      Illegal value.           */
+  EIO,           /* ERR_ARG        -10     Illegal argument.        */
+  EADDRINUSE,    /* ERR_USE        -11     Address in use.          */
+  -1,            /* ERR_IF         -12     Low-level netif error    */
+  -1,            /* ERR_ISCONN     -13     Already connected.       */
+  EINPROGRESS    /* ERR_INPROGRESS -14     Operation in progress    */
+};
+
+#define ERR_TO_ERRNO_TABLE_SIZE \
+  (sizeof(err_to_errno_table)/sizeof(err_to_errno_table[0]))
+
+#define err_to_errno(err) \
+  ((unsigned)(-(err)) < ERR_TO_ERRNO_TABLE_SIZE ? \
+    err_to_errno_table[-(err)] : EIO)
+
+#ifdef ERRNO
+#ifndef set_errno
+#define set_errno(err) errno = (err)
+#endif
+#else
+#define set_errno(err)
+#endif
+
+#define sock_set_errno(sk, e) do { \
+  sk->err = (e); \
+  set_errno(sk->err); \
+} while (0)
+
+/* Forward delcaration of some functions */
+static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len);
+static void lwip_getsockopt_internal(void *arg);
+static void lwip_setsockopt_internal(void *arg);
+
+/**
+ * Initialize this module. This function has to be called before any other
+ * functions in this module!
+ */
+void
+lwip_socket_init(void)
+{
+  socksem   = sys_sem_new(1);
+  selectsem = sys_sem_new(1);
+}
+
+/**
+ * Map a externally used socket index to the internal socket representation.
+ *
+ * @param s externally used socket index
+ * @return struct lwip_socket for the socket or NULL if not found
+ */
+static struct lwip_socket *
+get_socket(int s)
+{
+  struct lwip_socket *sock;
+
+  if ((s < 0) || (s >= NUM_SOCKETS)) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): invalid\n", s));
+    set_errno(EBADF);
+    return NULL;
+  }
+
+  sock = &sockets[s];
+
+  if (!sock->conn) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): not active\n", s));
+    set_errno(EBADF);
+    return NULL;
+  }
+
+  return sock;
+}
+
+/**
+ * Allocate a new socket for a given netconn.
+ *
+ * @param newconn the netconn for which to allocate a socket
+ * @return the index of the new socket; -1 on error
+ */
+static int
+alloc_socket(struct netconn *newconn)
+{
+  int i;
+
+  /* Protect socket array */
+  sys_sem_wait(socksem);
+
+  /* allocate a new socket identifier */
+  for (i = 0; i < NUM_SOCKETS; ++i) {
+    if (!sockets[i].conn) {
+      sockets[i].conn       = newconn;
+      sockets[i].lastdata   = NULL;
+      sockets[i].lastoffset = 0;
+      sockets[i].rcvevent   = 0;
+      sockets[i].sendevent  = 1; /* TCP send buf is empty */
+      sockets[i].flags      = 0;
+      sockets[i].err        = 0;
+      sys_sem_signal(socksem);
+      return i;
+    }
+  }
+  sys_sem_signal(socksem);
+  return -1;
+}
+
+/* Below this, the well-known socket functions are implemented.
+ * Use google.com or opengroup.org to get a good description :-)
+ *
+ * Exceptions are documented!
+ */
+
+int
+lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen)
+{
+  struct lwip_socket *sock, *nsock;
+  struct netconn *newconn;
+  struct ip_addr naddr;
+  u16_t port;
+  int newsock;
+  struct sockaddr_in sin;
+  err_t err;
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s));
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  if ((sock->flags & O_NONBLOCK) && (sock->rcvevent <= 0)) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): returning EWOULDBLOCK\n", s));
+    sock_set_errno(sock, EWOULDBLOCK);
+    return -1;
+  }
+
+  newconn = netconn_accept(sock->conn);
+  if (!newconn) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) failed, err=%d\n", s, sock->conn->err));
+    sock_set_errno(sock, err_to_errno(sock->conn->err));
+    return -1;
+  }
+
+  /* get the IP address and port of the remote host */
+  err = netconn_peer(newconn, &naddr, &port);
+  if (err != ERR_OK) {
+    netconn_delete(newconn);
+    sock_set_errno(sock, err_to_errno(err));
+    return -1;
+  }
+
+  /* Note that POSIX only requires us to check addr is non-NULL. addrlen must
+   * not be NULL if addr is valid.
+   */
+  if (NULL != addr) {
+    LWIP_ASSERT("addr valid but addrlen NULL", addrlen != NULL);
+    memset(&sin, 0, sizeof(sin));
+    sin.sin_len = sizeof(sin);
+    sin.sin_family = AF_INET;
+    sin.sin_port = htons(port);
+    sin.sin_addr.s_addr = naddr.addr;
+
+    if (*addrlen > sizeof(sin))
+      *addrlen = sizeof(sin);
+
+    MEMCPY(addr, &sin, *addrlen);
+  }
+
+  newsock = alloc_socket(newconn);
+  if (newsock == -1) {
+    netconn_delete(newconn);
+    sock_set_errno(sock, ENFILE);
+    return -1;
+  }
+  LWIP_ASSERT("invalid socket index", (newsock >= 0) && (newsock < NUM_SOCKETS));
+  newconn->callback = event_callback;
+  nsock = &sockets[newsock];
+  LWIP_ASSERT("invalid socket pointer", nsock != NULL);
+
+  sys_sem_wait(socksem);
+  /* See event_callback: If data comes in right away after an accept, even
+   * though the server task might not have created a new socket yet.
+   * In that case, newconn->socket is counted down (newconn->socket--),
+   * so nsock->rcvevent is >= 1 here!
+   */
+  nsock->rcvevent += -1 - newconn->socket;
+  newconn->socket = newsock;
+  sys_sem_signal(socksem);
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d addr=", s, newsock));
+  ip_addr_debug_print(SOCKETS_DEBUG, &naddr);
+  LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", port));
+
+  sock_set_errno(sock, 0);
+  return newsock;
+}
+
+int
+lwip_bind(int s, const struct sockaddr *name, socklen_t namelen)
+{
+  struct lwip_socket *sock;
+  struct ip_addr local_addr;
+  u16_t local_port;
+  err_t err;
+
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  LWIP_ERROR("lwip_bind: invalid address", ((namelen == sizeof(struct sockaddr_in)) &&
+             ((((const struct sockaddr_in *)name)->sin_family) == AF_INET)),
+             sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
+
+  local_addr.addr = ((const struct sockaddr_in *)name)->sin_addr.s_addr;
+  local_port = ((const struct sockaddr_in *)name)->sin_port;
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d, addr=", s));
+  ip_addr_debug_print(SOCKETS_DEBUG, &local_addr);
+  LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", ntohs(local_port)));
+
+  err = netconn_bind(sock->conn, &local_addr, ntohs(local_port));
+
+  if (err != ERR_OK) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) failed, err=%d\n", s, err));
+    sock_set_errno(sock, err_to_errno(err));
+    return -1;
+  }
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) succeeded\n", s));
+  sock_set_errno(sock, 0);
+  return 0;
+}
+
+int
+lwip_close(int s)
+{
+  struct lwip_socket *sock;
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s));
+
+  sock = get_socket(s);
+  if (!sock) {
+    return -1;
+  }
+
+  netconn_delete(sock->conn);
+
+  sys_sem_wait(socksem);
+  if (sock->lastdata) {
+    netbuf_delete(sock->lastdata);
+  }
+  sock->lastdata   = NULL;
+  sock->lastoffset = 0;
+  sock->conn       = NULL;
+  sock_set_errno(sock, 0);
+  sys_sem_signal(socksem);
+  return 0;
+}
+
+int
+lwip_connect(int s, const struct sockaddr *name, socklen_t namelen)
+{
+  struct lwip_socket *sock;
+  err_t err;
+
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  LWIP_ERROR("lwip_connect: invalid address", ((namelen == sizeof(struct sockaddr_in)) &&
+             ((((const struct sockaddr_in *)name)->sin_family) == AF_INET)),
+             sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
+
+  if (((const struct sockaddr_in *)name)->sin_family == AF_UNSPEC) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, AF_UNSPEC)\n", s));
+    err = netconn_disconnect(sock->conn);
+  } else {
+    struct ip_addr remote_addr;
+    u16_t remote_port;
+
+    remote_addr.addr = ((const struct sockaddr_in *)name)->sin_addr.s_addr;
+    remote_port = ((const struct sockaddr_in *)name)->sin_port;
+
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, addr=", s));
+    ip_addr_debug_print(SOCKETS_DEBUG, &remote_addr);
+    LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", ntohs(remote_port)));
+
+    err = netconn_connect(sock->conn, &remote_addr, ntohs(remote_port));
+  }
+
+  if (err != ERR_OK) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) failed, err=%d\n", s, err));
+    sock_set_errno(sock, err_to_errno(err));
+    return -1;
+  }
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) succeeded\n", s));
+  sock_set_errno(sock, 0);
+  return 0;
+}
+
+/**
+ * Set a socket into listen mode.
+ * The socket may not have been used for another connection previously.
+ *
+ * @param s the socket to set to listening mode
+ * @param backlog (ATTENTION: need TCP_LISTEN_BACKLOG=1)
+ * @return 0 on success, non-zero on failure
+ */
+int
+lwip_listen(int s, int backlog)
+{
+  struct lwip_socket *sock;
+  err_t err;
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d, backlog=%d)\n", s, backlog));
+
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  /* limit the "backlog" parameter to fit in an u8_t */
+  if (backlog < 0) {
+    backlog = 0;
+  }
+  if (backlog > 0xff) {
+    backlog = 0xff;
+  }
+
+  err = netconn_listen_with_backlog(sock->conn, backlog);
+
+  if (err != ERR_OK) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d) failed, err=%d\n", s, err));
+    sock_set_errno(sock, err_to_errno(err));
+    return -1;
+  }
+
+  sock_set_errno(sock, 0);
+  return 0;
+}
+
+int
+lwip_recvfrom(int s, void *mem, size_t len, int flags,
+        struct sockaddr *from, socklen_t *fromlen)
+{
+  struct lwip_socket *sock;
+  struct netbuf      *buf;
+  u16_t               buflen, copylen, off = 0;
+  struct ip_addr     *addr;
+  u16_t               port;
+  u8_t                done = 0;
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %"SZT_F", 0x%x, ..)\n", s, mem, len, flags));
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  do {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: top while sock->lastdata=%p\n", (void*)sock->lastdata));
+    /* Check if there is data left from the last recv operation. */
+    if (sock->lastdata) {
+      buf = sock->lastdata;
+    } else {
+      /* If this is non-blocking call, then check first */
+      if (((flags & MSG_DONTWAIT) || (sock->flags & O_NONBLOCK)) && 
+          (sock->rcvevent <= 0)) {
+        if (off > 0) {
+          /* already received data, return that */
+          sock_set_errno(sock, 0);
+          return off;
+        }
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): returning EWOULDBLOCK\n", s));
+        sock_set_errno(sock, EWOULDBLOCK);
+        return -1;
+      }
+
+      /* No data was left from the previous operation, so we try to get
+      some from the network. */
+      sock->lastdata = buf = netconn_recv(sock->conn);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: netconn_recv netbuf=%p\n", (void*)buf));
+
+      if (!buf) {
+        if (off > 0) {
+          /* already received data, return that */
+          sock_set_errno(sock, 0);
+          return off;
+        }
+        /* We should really do some error checking here. */
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): buf == NULL!\n", s));
+        sock_set_errno(sock, (((sock->conn->pcb.ip != NULL) && (sock->conn->err == ERR_OK))
+          ? ETIMEDOUT : err_to_errno(sock->conn->err)));
+        return 0;
+      }
+    }
+
+    buflen = netbuf_len(buf);
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: buflen=%"U16_F" len=%"SZT_F" off=%"U16_F" sock->lastoffset=%"U16_F"\n",
+      buflen, len, off, sock->lastoffset));
+
+    buflen -= sock->lastoffset;
+
+    if (len > buflen) {
+      copylen = buflen;
+    } else {
+      copylen = (u16_t)len;
+    }
+
+    /* copy the contents of the received buffer into
+    the supplied memory pointer mem */
+    netbuf_copy_partial(buf, (u8_t*)mem + off, copylen, sock->lastoffset);
+
+    off += copylen;
+
+    if (netconn_type(sock->conn) == NETCONN_TCP) {
+      LWIP_ASSERT("invalid copylen, len would underflow", len >= copylen);
+      len -= copylen;
+      if ( (len <= 0) || 
+           (buf->p->flags & PBUF_FLAG_PUSH) || 
+           (sock->rcvevent <= 0) || 
+           ((flags & MSG_PEEK)!=0)) {
+        done = 1;
+      }
+    } else {
+      done = 1;
+    }
+
+    /* Check to see from where the data was.*/
+    if (done) {
+      if (from && fromlen) {
+        struct sockaddr_in sin;
+
+        if (netconn_type(sock->conn) == NETCONN_TCP) {
+          addr = (struct ip_addr*)&(sin.sin_addr.s_addr);
+          netconn_getaddr(sock->conn, addr, &port, 0);
+        } else {
+          addr = netbuf_fromaddr(buf);
+          port = netbuf_fromport(buf);
+        }
+
+        memset(&sin, 0, sizeof(sin));
+        sin.sin_len = sizeof(sin);
+        sin.sin_family = AF_INET;
+        sin.sin_port = htons(port);
+        sin.sin_addr.s_addr = addr->addr;
+
+        if (*fromlen > sizeof(sin)) {
+          *fromlen = sizeof(sin);
+        }
+
+        MEMCPY(from, &sin, *fromlen);
+
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s));
+        ip_addr_debug_print(SOCKETS_DEBUG, addr);
+        LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%"U16_F"\n", port, off));
+      } else {
+  #if SOCKETS_DEBUG
+        struct sockaddr_in sin;
+
+        if (netconn_type(sock->conn) == NETCONN_TCP) {
+          addr = (struct ip_addr*)&(sin.sin_addr.s_addr);
+          netconn_getaddr(sock->conn, addr, &port, 0);
+        } else {
+          addr = netbuf_fromaddr(buf);
+          port = netbuf_fromport(buf);
+        }
+
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s));
+        ip_addr_debug_print(SOCKETS_DEBUG, addr);
+        LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%"U16_F"\n", port, off));
+  #endif /*  SOCKETS_DEBUG */
+      }
+    }
+
+    /* If we don't peek the incoming message... */
+    if ((flags & MSG_PEEK)==0) {
+      /* If this is a TCP socket, check if there is data left in the
+         buffer. If so, it should be saved in the sock structure for next
+         time around. */
+      if ((netconn_type(sock->conn) == NETCONN_TCP) && (buflen - copylen > 0)) {
+        sock->lastdata = buf;
+        sock->lastoffset += copylen;
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: lastdata now netbuf=%p\n", (void*)buf));
+      } else {
+        sock->lastdata = NULL;
+        sock->lastoffset = 0;
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: deleting netbuf=%p\n", (void*)buf));
+        netbuf_delete(buf);
+      }
+    }
+  } while (!done);
+
+  sock_set_errno(sock, 0);
+  return off;
+}
+
+int
+lwip_read(int s, void *mem, size_t len)
+{
+  return lwip_recvfrom(s, mem, len, 0, NULL, NULL);
+}
+
+int
+lwip_recv(int s, void *mem, size_t len, int flags)
+{
+  return lwip_recvfrom(s, mem, len, flags, NULL, NULL);
+}
+
+int
+lwip_send(int s, const void *data, size_t size, int flags)
+{
+  struct lwip_socket *sock;
+  err_t err;
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d, data=%p, size=%"SZT_F", flags=0x%x)\n",
+                              s, data, size, flags));
+
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  if (sock->conn->type != NETCONN_TCP) {
+#if (LWIP_UDP || LWIP_RAW)
+    return lwip_sendto(s, data, size, flags, NULL, 0);
+#else
+    sock_set_errno(sock, err_to_errno(ERR_ARG));
+    return -1;
+#endif /* (LWIP_UDP || LWIP_RAW) */
+  }
+
+  err = netconn_write(sock->conn, data, size, NETCONN_COPY | ((flags & MSG_MORE)?NETCONN_MORE:0));
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d size=%"SZT_F"\n", s, err, size));
+  sock_set_errno(sock, err_to_errno(err));
+  return (err == ERR_OK ? (int)size : -1);
+}
+
+int
+lwip_sendto(int s, const void *data, size_t size, int flags,
+       const struct sockaddr *to, socklen_t tolen)
+{
+  struct lwip_socket *sock;
+  struct ip_addr remote_addr;
+  err_t err;
+  u16_t short_size;
+#if !LWIP_TCPIP_CORE_LOCKING
+  struct netbuf buf;
+  u16_t remote_port;
+#endif
+
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  if (sock->conn->type == NETCONN_TCP) {
+#if LWIP_TCP
+    return lwip_send(s, data, size, flags);
+#else
+    sock_set_errno(sock, err_to_errno(ERR_ARG));
+    return -1;
+#endif /* LWIP_TCP */
+  }
+
+  LWIP_ASSERT("lwip_sendto: size must fit in u16_t", size <= 0xffff);
+  short_size = (u16_t)size;
+  LWIP_ERROR("lwip_sendto: invalid address", (((to == NULL) && (tolen == 0)) ||
+             ((tolen == sizeof(struct sockaddr_in)) &&
+             ((((const struct sockaddr_in *)to)->sin_family) == AF_INET))),
+             sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;);
+
+#if LWIP_TCPIP_CORE_LOCKING
+  /* Should only be consider like a sample or a simple way to experiment this option (no check of "to" field...) */
+  { struct pbuf* p;
+  
+    p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
+    if (p == NULL) {
+      err = ERR_MEM;
+    } else {
+      p->payload = (void*)data;
+      p->len = p->tot_len = short_size;
+      
+      remote_addr.addr = ((const struct sockaddr_in *)to)->sin_addr.s_addr;
+      
+      LOCK_TCPIP_CORE();
+      if (sock->conn->type==NETCONN_RAW) {
+        err = sock->conn->err = raw_sendto(sock->conn->pcb.raw, p, &remote_addr);
+      } else {
+        err = sock->conn->err = udp_sendto(sock->conn->pcb.udp, p, &remote_addr, ntohs(((const struct sockaddr_in *)to)->sin_port));
+      }
+      UNLOCK_TCPIP_CORE();
+      
+      pbuf_free(p);
+    }
+  }
+#else
+  /* initialize a buffer */
+  buf.p = buf.ptr = NULL;
+  if (to) {
+    remote_addr.addr = ((const struct sockaddr_in *)to)->sin_addr.s_addr;
+    remote_port      = ntohs(((const struct sockaddr_in *)to)->sin_port);
+    buf.addr         = &remote_addr;
+    buf.port         = remote_port;
+  } else {
+    remote_addr.addr = 0;
+    remote_port      = 0;
+    buf.addr         = NULL;
+    buf.port         = 0;
+  }
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, short_size=%d"U16_F", flags=0x%x to=",
+              s, data, short_size, flags));
+  ip_addr_debug_print(SOCKETS_DEBUG, &remote_addr);
+  LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", remote_port));
+
+  /* make the buffer point to the data that should be sent */
+#if LWIP_NETIF_TX_SINGLE_PBUF
+  /* Allocate a new netbuf and copy the data into it. */
+  if (netbuf_alloc(&buf, short_size) == NULL) {
+    err = ERR_MEM;
+  } else {
+    err = netbuf_take(&buf, data, short_size);
+  }
+#else /* LWIP_NETIF_TX_SINGLE_PBUF */
+  err = netbuf_ref(&buf, data, short_size);
+#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
+  if (err == ERR_OK) {
+    /* send the data */
+    err = netconn_send(sock->conn, &buf);
+  }
+
+  /* deallocated the buffer */
+  netbuf_free(&buf);
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+  sock_set_errno(sock, err_to_errno(err));
+  return (err == ERR_OK ? short_size : -1);
+}
+
+int
+lwip_socket(int domain, int type, int protocol)
+{
+  struct netconn *conn;
+  int i;
+
+  LWIP_UNUSED_ARG(domain);
+
+  /* create a netconn */
+  switch (type) {
+  case SOCK_RAW:
+    conn = netconn_new_with_proto_and_callback(NETCONN_RAW, (u8_t)protocol, event_callback);
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_RAW, %d) = ",
+                                 domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
+    break;
+  case SOCK_DGRAM:
+    conn = netconn_new_with_callback( (protocol == IPPROTO_UDPLITE) ?
+                 NETCONN_UDPLITE : NETCONN_UDP, event_callback);
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_DGRAM, %d) = ",
+                                 domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
+    break;
+  case SOCK_STREAM:
+    conn = netconn_new_with_callback(NETCONN_TCP, event_callback);
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ",
+                                 domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol));
+    break;
+  default:
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%d, %d/UNKNOWN, %d) = -1\n",
+                                 domain, type, protocol));
+    set_errno(EINVAL);
+    return -1;
+  }
+
+  if (!conn) {
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n"));
+    set_errno(ENOBUFS);
+    return -1;
+  }
+
+  i = alloc_socket(conn);
+
+  if (i == -1) {
+    netconn_delete(conn);
+    set_errno(ENFILE);
+    return -1;
+  }
+  conn->socket = i;
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i));
+  set_errno(0);
+  return i;
+}
+
+int
+lwip_write(int s, const void *data, size_t size)
+{
+  return lwip_send(s, data, size, 0);
+}
+
+/**
+ * Go through the readset and writeset lists and see which socket of the sockets
+ * set in the sets has events. On return, readset, writeset and exceptset have
+ * the sockets enabled that had events.
+ *
+ * exceptset is not used for now!!!
+ *
+ * @param maxfdp1 the highest socket index in the sets
+ * @param readset in: set of sockets to check for read events;
+ *                out: set of sockets that had read events
+ * @param writeset in: set of sockets to check for write events;
+ *                 out: set of sockets that had write events
+ * @param exceptset not yet implemented
+ * @return number of sockets that had events (read+write)
+ */
+static int
+lwip_selscan(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset)
+{
+  int i, nready = 0;
+  fd_set lreadset, lwriteset, lexceptset;
+  struct lwip_socket *p_sock;
+  
+  FD_ZERO(&lreadset);
+  FD_ZERO(&lwriteset);
+  FD_ZERO(&lexceptset);
+  
+  /* Go through each socket in each list to count number of sockets which
+  currently match */
+  for(i = 0; i < maxfdp1; i++) {
+    if (FD_ISSET(i, readset)) {
+      /* See if netconn of this socket is ready for read */
+      p_sock = get_socket(i);
+      if (p_sock && (p_sock->lastdata || (p_sock->rcvevent > 0))) {
+        FD_SET(i, &lreadset);
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for reading\n", i));
+        nready++;
+      }
+    }
+    if (FD_ISSET(i, writeset)) {
+      /* See if netconn of this socket is ready for write */
+      p_sock = get_socket(i);
+      if (p_sock && p_sock->sendevent) {
+        FD_SET(i, &lwriteset);
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for writing\n", i));
+        nready++;
+      }
+    }
+  }
+  *readset = lreadset;
+  *writeset = lwriteset;
+  FD_ZERO(exceptset);
+  
+  return nready;
+}
+
+
+/**
+ * Processing exceptset is not yet implemented.
+ */
+int
+lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset,
+               struct timeval *timeout)
+{
+  int i;
+  int nready;
+  fd_set lreadset, lwriteset, lexceptset;
+  u32_t msectimeout;
+  struct lwip_select_cb select_cb;
+  struct lwip_select_cb *p_selcb;
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select(%d, %p, %p, %p, tvsec=%ld tvusec=%ld)\n",
+                  maxfdp1, (void *)readset, (void *) writeset, (void *) exceptset,
+                  timeout ? (long)timeout->tv_sec : (long)-1,
+                  timeout ? (long)timeout->tv_usec : (long)-1));
+
+  select_cb.next = 0;
+  select_cb.readset = readset;
+  select_cb.writeset = writeset;
+  select_cb.exceptset = exceptset;
+  select_cb.sem_signalled = 0;
+
+  /* Protect ourselves searching through the list */
+  sys_sem_wait(selectsem);
+
+  if (readset)
+    lreadset = *readset;
+  else
+    FD_ZERO(&lreadset);
+  if (writeset)
+    lwriteset = *writeset;
+  else
+    FD_ZERO(&lwriteset);
+  if (exceptset)
+    lexceptset = *exceptset;
+  else
+    FD_ZERO(&lexceptset);
+
+  /* Go through each socket in each list to count number of sockets which
+     currently match */
+  nready = lwip_selscan(maxfdp1, &lreadset, &lwriteset, &lexceptset);
+
+  /* If we don't have any current events, then suspend if we are supposed to */
+  if (!nready) {
+    if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) {
+      sys_sem_signal(selectsem);
+      if (readset)
+        FD_ZERO(readset);
+      if (writeset)
+        FD_ZERO(writeset);
+      if (exceptset)
+        FD_ZERO(exceptset);
+  
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout, returning 0\n"));
+      set_errno(0);
+  
+      return 0;
+    }
+    
+    /* add our semaphore to list */
+    /* We don't actually need any dynamic memory. Our entry on the
+     * list is only valid while we are in this function, so it's ok
+     * to use local variables */
+    
+    select_cb.sem = sys_sem_new(0);
+    /* Note that we are still protected */
+    /* Put this select_cb on top of list */
+    select_cb.next = select_cb_list;
+    select_cb_list = &select_cb;
+    
+    /* Now we can safely unprotect */
+    sys_sem_signal(selectsem);
+    
+    /* Now just wait to be woken */
+    if (timeout == 0)
+      /* Wait forever */
+      msectimeout = 0;
+    else {
+      msectimeout =  ((timeout->tv_sec * 1000) + ((timeout->tv_usec + 500)/1000));
+      if(msectimeout == 0)
+        msectimeout = 1;
+    }
+    
+    i = sys_sem_wait_timeout(select_cb.sem, msectimeout);
+    
+    /* Take us off the list */
+    sys_sem_wait(selectsem);
+    if (select_cb_list == &select_cb)
+      select_cb_list = select_cb.next;
+    else
+      for (p_selcb = select_cb_list; p_selcb; p_selcb = p_selcb->next) {
+        if (p_selcb->next == &select_cb) {
+          p_selcb->next = select_cb.next;
+          break;
+        }
+      }
+    
+    sys_sem_signal(selectsem);
+    
+    sys_sem_free(select_cb.sem);
+    if (i == 0)  {
+      /* Timeout */
+      if (readset)
+        FD_ZERO(readset);
+      if (writeset)
+        FD_ZERO(writeset);
+      if (exceptset)
+        FD_ZERO(exceptset);
+  
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: timeout expired\n"));
+      set_errno(0);
+  
+      return 0;
+    }
+    
+    if (readset)
+      lreadset = *readset;
+    else
+      FD_ZERO(&lreadset);
+    if (writeset)
+      lwriteset = *writeset;
+    else
+      FD_ZERO(&lwriteset);
+    if (exceptset)
+      lexceptset = *exceptset;
+    else
+      FD_ZERO(&lexceptset);
+    
+    /* See what's set */
+    nready = lwip_selscan(maxfdp1, &lreadset, &lwriteset, &lexceptset);
+  } else
+    sys_sem_signal(selectsem);
+  
+  if (readset)
+    *readset = lreadset;
+  if (writeset)
+    *writeset = lwriteset;
+  if (exceptset)
+    *exceptset = lexceptset;
+  
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready));
+  set_errno(0);
+  
+  return nready;
+}
+
+/**
+ * Callback registered in the netconn layer for each socket-netconn.
+ * Processes recvevent (data available) and wakes up tasks waiting for select.
+ */
+static void
+event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len)
+{
+  int s;
+  struct lwip_socket *sock;
+  struct lwip_select_cb *scb;
+
+  LWIP_UNUSED_ARG(len);
+
+  /* Get socket */
+  if (conn) {
+    s = conn->socket;
+    if (s < 0) {
+      /* Data comes in right away after an accept, even though
+       * the server task might not have created a new socket yet.
+       * Just count down (or up) if that's the case and we
+       * will use the data later. Note that only receive events
+       * can happen before the new socket is set up. */
+      sys_sem_wait(socksem);
+      if (conn->socket < 0) {
+        if (evt == NETCONN_EVT_RCVPLUS) {
+          conn->socket--;
+        }
+        sys_sem_signal(socksem);
+        return;
+      }
+      sys_sem_signal(socksem);
+    }
+
+    sock = get_socket(s);
+    if (!sock) {
+      return;
+    }
+  } else {
+    return;
+  }
+
+  sys_sem_wait(selectsem);
+  /* Set event as required */
+  switch (evt) {
+    case NETCONN_EVT_RCVPLUS:
+      sock->rcvevent++;
+      break;
+    case NETCONN_EVT_RCVMINUS:
+      sock->rcvevent--;
+      break;
+    case NETCONN_EVT_SENDPLUS:
+      sock->sendevent = 1;
+      break;
+    case NETCONN_EVT_SENDMINUS:
+      sock->sendevent = 0;
+      break;
+    default:
+      LWIP_ASSERT("unknown event", 0);
+      break;
+  }
+  sys_sem_signal(selectsem);
+
+  /* Now decide if anyone is waiting for this socket */
+  /* NOTE: This code is written this way to protect the select link list
+     but to avoid a deadlock situation by releasing socksem before
+     signalling for the select. This means we need to go through the list
+     multiple times ONLY IF a select was actually waiting. We go through
+     the list the number of waiting select calls + 1. This list is
+     expected to be small. */
+  while (1) {
+    sys_sem_wait(selectsem);
+    for (scb = select_cb_list; scb; scb = scb->next) {
+      if (scb->sem_signalled == 0) {
+        /* Test this select call for our socket */
+        if (scb->readset && FD_ISSET(s, scb->readset))
+          if (sock->rcvevent > 0)
+            break;
+        if (scb->writeset && FD_ISSET(s, scb->writeset))
+          if (sock->sendevent)
+            break;
+      }
+    }
+    if (scb) {
+      scb->sem_signalled = 1;
+      sys_sem_signal(scb->sem);
+      sys_sem_signal(selectsem);
+    } else {
+      sys_sem_signal(selectsem);
+      break;
+    }
+  }
+}
+
+/**
+ * Unimplemented: Close one end of a full-duplex connection.
+ * Currently, the full connection is closed.
+ */
+int
+lwip_shutdown(int s, int how)
+{
+  LWIP_UNUSED_ARG(how);
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how));
+  return lwip_close(s); /* XXX temporary hack until proper implementation */
+}
+
+static int
+lwip_getaddrname(int s, struct sockaddr *name, socklen_t *namelen, u8_t local)
+{
+  struct lwip_socket *sock;
+  struct sockaddr_in sin;
+  struct ip_addr naddr;
+
+  sock = get_socket(s);
+  if (!sock)
+    return -1;
+
+  memset(&sin, 0, sizeof(sin));
+  sin.sin_len = sizeof(sin);
+  sin.sin_family = AF_INET;
+
+  /* get the IP address and port */
+  netconn_getaddr(sock->conn, &naddr, &sin.sin_port, local);
+
+  LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getaddrname(%d, addr=", s));
+  ip_addr_debug_print(SOCKETS_DEBUG, &naddr);
+  LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", sin.sin_port));
+
+  sin.sin_port = htons(sin.sin_port);
+  sin.sin_addr.s_addr = naddr.addr;
+
+  if (*namelen > sizeof(sin))
+    *namelen = sizeof(sin);
+
+  MEMCPY(name, &sin, *namelen);
+  sock_set_errno(sock, 0);
+  return 0;
+}
+
+int
+lwip_getpeername(int s, struct sockaddr *name, socklen_t *namelen)
+{
+  return lwip_getaddrname(s, name, namelen, 0);
+}
+
+int
+lwip_getsockname(int s, struct sockaddr *name, socklen_t *namelen)
+{
+  return lwip_getaddrname(s, name, namelen, 1);
+}
+
+int
+lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen)
+{
+  err_t err = ERR_OK;
+  struct lwip_socket *sock = get_socket(s);
+  struct lwip_setgetsockopt_data data;
+
+  if (!sock)
+    return -1;
+
+  if ((NULL == optval) || (NULL == optlen)) {
+    sock_set_errno(sock, EFAULT);
+    return -1;
+  }
+
+  /* Do length and type checks for the various options first, to keep it readable. */
+  switch (level) {
+   
+/* Level: SOL_SOCKET */
+  case SOL_SOCKET:
+    switch (optname) {
+       
+    case SO_ACCEPTCONN:
+    case SO_BROADCAST:
+    /* UNIMPL case SO_DEBUG: */
+    /* UNIMPL case SO_DONTROUTE: */
+    case SO_ERROR:
+    case SO_KEEPALIVE:
+    /* UNIMPL case SO_CONTIMEO: */
+    /* UNIMPL case SO_SNDTIMEO: */
+#if LWIP_SO_RCVTIMEO
+    case SO_RCVTIMEO:
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+    case SO_RCVBUF:
+#endif /* LWIP_SO_RCVBUF */
+    /* UNIMPL case SO_OOBINLINE: */
+    /* UNIMPL case SO_SNDBUF: */
+    /* UNIMPL case SO_RCVLOWAT: */
+    /* UNIMPL case SO_SNDLOWAT: */
+#if SO_REUSE
+    case SO_REUSEADDR:
+    case SO_REUSEPORT:
+#endif /* SO_REUSE */
+    case SO_TYPE:
+    /* UNIMPL case SO_USELOOPBACK: */
+      if (*optlen < sizeof(int)) {
+        err = EINVAL;
+      }
+      break;
+
+    case SO_NO_CHECK:
+      if (*optlen < sizeof(int)) {
+        err = EINVAL;
+      }
+#if LWIP_UDP
+      if ((sock->conn->type != NETCONN_UDP) ||
+          ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0)) {
+        /* this flag is only available for UDP, not for UDP lite */
+        err = EAFNOSUPPORT;
+      }
+#endif /* LWIP_UDP */
+      break;
+
+    default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n",
+                                  s, optname));
+      err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+                     
+/* Level: IPPROTO_IP */
+  case IPPROTO_IP:
+    switch (optname) {
+    /* UNIMPL case IP_HDRINCL: */
+    /* UNIMPL case IP_RCVDSTADDR: */
+    /* UNIMPL case IP_RCVIF: */
+    case IP_TTL:
+    case IP_TOS:
+      if (*optlen < sizeof(int)) {
+        err = EINVAL;
+      }
+      break;
+#if LWIP_IGMP
+    case IP_MULTICAST_TTL:
+      if (*optlen < sizeof(u8_t)) {
+        err = EINVAL;
+      }
+      break;
+    case IP_MULTICAST_IF:
+      if (*optlen < sizeof(struct in_addr)) {
+        err = EINVAL;
+      }
+      break;
+#endif /* LWIP_IGMP */
+
+    default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n",
+                                  s, optname));
+      err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+         
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+  case IPPROTO_TCP:
+    if (*optlen < sizeof(int)) {
+      err = EINVAL;
+      break;
+    }
+    
+    /* If this is no TCP socket, ignore any options. */
+    if (sock->conn->type != NETCONN_TCP)
+      return 0;
+
+    switch (optname) {
+    case TCP_NODELAY:
+    case TCP_KEEPALIVE:
+#if LWIP_TCP_KEEPALIVE
+    case TCP_KEEPIDLE:
+    case TCP_KEEPINTVL:
+    case TCP_KEEPCNT:
+#endif /* LWIP_TCP_KEEPALIVE */
+      break;
+       
+    default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n",
+                                  s, optname));
+      err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_TCP */
+#if LWIP_UDP && LWIP_UDPLITE
+/* Level: IPPROTO_UDPLITE */
+  case IPPROTO_UDPLITE:
+    if (*optlen < sizeof(int)) {
+      err = EINVAL;
+      break;
+    }
+    
+    /* If this is no UDP lite socket, ignore any options. */
+    if (sock->conn->type != NETCONN_UDPLITE)
+      return 0;
+
+    switch (optname) {
+    case UDPLITE_SEND_CSCOV:
+    case UDPLITE_RECV_CSCOV:
+      break;
+       
+    default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n",
+                                  s, optname));
+      err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_UDP && LWIP_UDPLITE*/
+/* UNDEFINED LEVEL */
+  default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n",
+                                  s, level, optname));
+      err = ENOPROTOOPT;
+  }  /* switch */
+
+   
+  if (err != ERR_OK) {
+    sock_set_errno(sock, err);
+    return -1;
+  }
+
+  /* Now do the actual option processing */
+  data.sock = sock;
+  data.level = level;
+  data.optname = optname;
+  data.optval = optval;
+  data.optlen = optlen;
+  data.err = err;
+  tcpip_callback(lwip_getsockopt_internal, &data);
+  sys_arch_sem_wait(sock->conn->op_completed, 0);
+  /* maybe lwip_getsockopt_internal has changed err */
+  err = data.err;
+
+  sock_set_errno(sock, err);
+  return err ? -1 : 0;
+}
+
+static void
+lwip_getsockopt_internal(void *arg)
+{
+  struct lwip_socket *sock;
+#ifdef LWIP_DEBUG
+  int s;
+#endif /* LWIP_DEBUG */
+  int level, optname;
+  void *optval;
+  struct lwip_setgetsockopt_data *data;
+
+  LWIP_ASSERT("arg != NULL", arg != NULL);
+
+  data = (struct lwip_setgetsockopt_data*)arg;
+  sock = data->sock;
+#ifdef LWIP_DEBUG
+  s = data->s;
+#endif /* LWIP_DEBUG */
+  level = data->level;
+  optname = data->optname;
+  optval = data->optval;
+
+  switch (level) {
+   
+/* Level: SOL_SOCKET */
+  case SOL_SOCKET:
+    switch (optname) {
+
+    /* The option flags */
+    case SO_ACCEPTCONN:
+    case SO_BROADCAST:
+    /* UNIMPL case SO_DEBUG: */
+    /* UNIMPL case SO_DONTROUTE: */
+    case SO_KEEPALIVE:
+    /* UNIMPL case SO_OOBINCLUDE: */
+#if SO_REUSE
+    case SO_REUSEADDR:
+    case SO_REUSEPORT:
+#endif /* SO_REUSE */
+    /*case SO_USELOOPBACK: UNIMPL */
+      *(int*)optval = sock->conn->pcb.ip->so_options & optname;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, optname=0x%x, ..) = %s\n",
+                                  s, optname, (*(int*)optval?"on":"off")));
+      break;
+
+    case SO_TYPE:
+      switch (NETCONNTYPE_GROUP(sock->conn->type)) {
+      case NETCONN_RAW:
+        *(int*)optval = SOCK_RAW;
+        break;
+      case NETCONN_TCP:
+        *(int*)optval = SOCK_STREAM;
+        break;
+      case NETCONN_UDP:
+        *(int*)optval = SOCK_DGRAM;
+        break;
+      default: /* unrecognized socket type */
+        *(int*)optval = sock->conn->type;
+        LWIP_DEBUGF(SOCKETS_DEBUG,
+                    ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE): unrecognized socket type %d\n",
+                    s, *(int *)optval));
+      }  /* switch (sock->conn->type) */
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n",
+                  s, *(int *)optval));
+      break;
+
+    case SO_ERROR:
+      if (sock->err == 0) {
+        sock_set_errno(sock, err_to_errno(sock->conn->err));
+      } 
+      *(int *)optval = sock->err;
+      sock->err = 0;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_ERROR) = %d\n",
+                  s, *(int *)optval));
+      break;
+
+#if LWIP_SO_RCVTIMEO
+    case SO_RCVTIMEO:
+      *(int *)optval = sock->conn->recv_timeout;
+      break;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+    case SO_RCVBUF:
+      *(int *)optval = sock->conn->recv_bufsize;
+      break;
+#endif /* LWIP_SO_RCVBUF */
+#if LWIP_UDP
+    case SO_NO_CHECK:
+      *(int*)optval = (udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_NOCHKSUM) ? 1 : 0;
+      break;
+#endif /* LWIP_UDP*/
+    }  /* switch (optname) */
+    break;
+
+/* Level: IPPROTO_IP */
+  case IPPROTO_IP:
+    switch (optname) {
+    case IP_TTL:
+      *(int*)optval = sock->conn->pcb.ip->ttl;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TTL) = %d\n",
+                  s, *(int *)optval));
+      break;
+    case IP_TOS:
+      *(int*)optval = sock->conn->pcb.ip->tos;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n",
+                  s, *(int *)optval));
+      break;
+#if LWIP_IGMP
+    case IP_MULTICAST_TTL:
+      *(u8_t*)optval = sock->conn->pcb.ip->ttl;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_TTL) = %d\n",
+                  s, *(int *)optval));
+      break;
+    case IP_MULTICAST_IF:
+      ((struct in_addr*) optval)->s_addr = sock->conn->pcb.udp->multicast_ip.addr;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_IF) = 0x%"X32_F"\n",
+                  s, *(u32_t *)optval));
+      break;
+#endif /* LWIP_IGMP */
+    }  /* switch (optname) */
+    break;
+
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+  case IPPROTO_TCP:
+    switch (optname) {
+    case TCP_NODELAY:
+      *(int*)optval = (sock->conn->pcb.tcp->flags & TF_NODELAY);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_NODELAY) = %s\n",
+                  s, (*(int*)optval)?"on":"off") );
+      break;
+    case TCP_KEEPALIVE:
+      *(int*)optval = (int)sock->conn->pcb.tcp->keep_idle;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPALIVE) = %d\n",
+                  s, *(int *)optval));
+      break;
+
+#if LWIP_TCP_KEEPALIVE
+    case TCP_KEEPIDLE:
+      *(int*)optval = (int)(sock->conn->pcb.tcp->keep_idle/1000);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPIDLE) = %d\n",
+                  s, *(int *)optval));
+      break;
+    case TCP_KEEPINTVL:
+      *(int*)optval = (int)(sock->conn->pcb.tcp->keep_intvl/1000);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPINTVL) = %d\n",
+                  s, *(int *)optval));
+      break;
+    case TCP_KEEPCNT:
+      *(int*)optval = (int)sock->conn->pcb.tcp->keep_cnt;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, TCP_KEEPCNT) = %d\n",
+                  s, *(int *)optval));
+      break;
+#endif /* LWIP_TCP_KEEPALIVE */
+
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_TCP */
+#if LWIP_UDP && LWIP_UDPLITE
+  /* Level: IPPROTO_UDPLITE */
+  case IPPROTO_UDPLITE:
+    switch (optname) {
+    case UDPLITE_SEND_CSCOV:
+      *(int*)optval = sock->conn->pcb.udp->chksum_len_tx;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) = %d\n",
+                  s, (*(int*)optval)) );
+      break;
+    case UDPLITE_RECV_CSCOV:
+      *(int*)optval = sock->conn->pcb.udp->chksum_len_rx;
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) = %d\n",
+                  s, (*(int*)optval)) );
+      break;
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_UDP */
+  } /* switch (level) */
+  sys_sem_signal(sock->conn->op_completed);
+}
+
+int
+lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen)
+{
+  struct lwip_socket *sock = get_socket(s);
+  int err = ERR_OK;
+  struct lwip_setgetsockopt_data data;
+
+  if (!sock)
+    return -1;
+
+  if (NULL == optval) {
+    sock_set_errno(sock, EFAULT);
+    return -1;
+  }
+
+  /* Do length and type checks for the various options first, to keep it readable. */
+  switch (level) {
+
+/* Level: SOL_SOCKET */
+  case SOL_SOCKET:
+    switch (optname) {
+
+    case SO_BROADCAST:
+    /* UNIMPL case SO_DEBUG: */
+    /* UNIMPL case SO_DONTROUTE: */
+    case SO_KEEPALIVE:
+    /* UNIMPL case case SO_CONTIMEO: */
+    /* UNIMPL case case SO_SNDTIMEO: */
+#if LWIP_SO_RCVTIMEO
+    case SO_RCVTIMEO:
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+    case SO_RCVBUF:
+#endif /* LWIP_SO_RCVBUF */
+    /* UNIMPL case SO_OOBINLINE: */
+    /* UNIMPL case SO_SNDBUF: */
+    /* UNIMPL case SO_RCVLOWAT: */
+    /* UNIMPL case SO_SNDLOWAT: */
+#if SO_REUSE
+    case SO_REUSEADDR:
+    case SO_REUSEPORT:
+#endif /* SO_REUSE */
+    /* UNIMPL case SO_USELOOPBACK: */
+      if (optlen < sizeof(int)) {
+        err = EINVAL;
+      }
+      break;
+    case SO_NO_CHECK:
+      if (optlen < sizeof(int)) {
+        err = EINVAL;
+      }
+#if LWIP_UDP
+      if ((sock->conn->type != NETCONN_UDP) ||
+          ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0)) {
+        /* this flag is only available for UDP, not for UDP lite */
+        err = EAFNOSUPPORT;
+      }
+#endif /* LWIP_UDP */
+      break;
+    default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n",
+                  s, optname));
+      err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+
+/* Level: IPPROTO_IP */
+  case IPPROTO_IP:
+    switch (optname) {
+    /* UNIMPL case IP_HDRINCL: */
+    /* UNIMPL case IP_RCVDSTADDR: */
+    /* UNIMPL case IP_RCVIF: */
+    case IP_TTL:
+    case IP_TOS:
+      if (optlen < sizeof(int)) {
+        err = EINVAL;
+      }
+      break;
+#if LWIP_IGMP
+    case IP_MULTICAST_TTL:
+      if (optlen < sizeof(u8_t)) {
+        err = EINVAL;
+      }
+      if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) {
+        err = EAFNOSUPPORT;
+      }
+      break;
+    case IP_MULTICAST_IF:
+      if (optlen < sizeof(struct in_addr)) {
+        err = EINVAL;
+      }
+      if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) {
+        err = EAFNOSUPPORT;
+      }
+      break;
+    case IP_ADD_MEMBERSHIP:
+    case IP_DROP_MEMBERSHIP:
+      if (optlen < sizeof(struct ip_mreq)) {
+        err = EINVAL;
+      }
+      if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_UDP) {
+        err = EAFNOSUPPORT;
+      }
+      break;
+#endif /* LWIP_IGMP */
+      default:
+        LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n",
+                    s, optname));
+        err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+  case IPPROTO_TCP:
+    if (optlen < sizeof(int)) {
+      err = EINVAL;
+      break;
+    }
+
+    /* If this is no TCP socket, ignore any options. */
+    if (sock->conn->type != NETCONN_TCP)
+      return 0;
+
+    switch (optname) {
+    case TCP_NODELAY:
+    case TCP_KEEPALIVE:
+#if LWIP_TCP_KEEPALIVE
+    case TCP_KEEPIDLE:
+    case TCP_KEEPINTVL:
+    case TCP_KEEPCNT:
+#endif /* LWIP_TCP_KEEPALIVE */
+      break;
+
+    default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n",
+                  s, optname));
+      err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_TCP */
+#if LWIP_UDP && LWIP_UDPLITE
+/* Level: IPPROTO_UDPLITE */
+  case IPPROTO_UDPLITE:
+    if (optlen < sizeof(int)) {
+      err = EINVAL;
+      break;
+    }
+
+    /* If this is no UDP lite socket, ignore any options. */
+    if (sock->conn->type != NETCONN_UDPLITE)
+      return 0;
+
+    switch (optname) {
+    case UDPLITE_SEND_CSCOV:
+    case UDPLITE_RECV_CSCOV:
+      break;
+
+    default:
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n",
+                  s, optname));
+      err = ENOPROTOOPT;
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_UDP && LWIP_UDPLITE */
+/* UNDEFINED LEVEL */
+  default:
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n",
+                s, level, optname));
+    err = ENOPROTOOPT;
+  }  /* switch (level) */
+
+
+  if (err != ERR_OK) {
+    sock_set_errno(sock, err);
+    return -1;
+  }
+
+
+  /* Now do the actual option processing */
+  data.sock = sock;
+  data.level = level;
+  data.optname = optname;
+  data.optval = (void*)optval;
+  data.optlen = &optlen;
+  data.err = err;
+  tcpip_callback(lwip_setsockopt_internal, &data);
+  sys_arch_sem_wait(sock->conn->op_completed, 0);
+  /* maybe lwip_setsockopt_internal has changed err */
+  err = data.err;
+
+  sock_set_errno(sock, err);
+  return err ? -1 : 0;
+}
+
+static void
+lwip_setsockopt_internal(void *arg)
+{
+  struct lwip_socket *sock;
+#ifdef LWIP_DEBUG
+  int s;
+#endif /* LWIP_DEBUG */
+  int level, optname;
+  const void *optval;
+  struct lwip_setgetsockopt_data *data;
+
+  LWIP_ASSERT("arg != NULL", arg != NULL);
+
+  data = (struct lwip_setgetsockopt_data*)arg;
+  sock = data->sock;
+#ifdef LWIP_DEBUG
+  s = data->s;
+#endif /* LWIP_DEBUG */
+  level = data->level;
+  optname = data->optname;
+  optval = data->optval;
+
+  switch (level) {
+
+/* Level: SOL_SOCKET */
+  case SOL_SOCKET:
+    switch (optname) {
+
+    /* The option flags */
+    case SO_BROADCAST:
+    /* UNIMPL case SO_DEBUG: */
+    /* UNIMPL case SO_DONTROUTE: */
+    case SO_KEEPALIVE:
+    /* UNIMPL case SO_OOBINCLUDE: */
+#if SO_REUSE
+    case SO_REUSEADDR:
+    case SO_REUSEPORT:
+#endif /* SO_REUSE */
+    /* UNIMPL case SO_USELOOPBACK: */
+      if (*(int*)optval) {
+        sock->conn->pcb.ip->so_options |= optname;
+      } else {
+        sock->conn->pcb.ip->so_options &= ~optname;
+      }
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, optname=0x%x, ..) -> %s\n",
+                  s, optname, (*(int*)optval?"on":"off")));
+      break;
+#if LWIP_SO_RCVTIMEO
+    case SO_RCVTIMEO:
+      sock->conn->recv_timeout = ( *(int*)optval );
+      break;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+    case SO_RCVBUF:
+      sock->conn->recv_bufsize = ( *(int*)optval );
+      break;
+#endif /* LWIP_SO_RCVBUF */
+#if LWIP_UDP
+    case SO_NO_CHECK:
+      if (*(int*)optval) {
+        udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) | UDP_FLAGS_NOCHKSUM);
+      } else {
+        udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) & ~UDP_FLAGS_NOCHKSUM);
+      }
+      break;
+#endif /* LWIP_UDP */
+    }  /* switch (optname) */
+    break;
+
+/* Level: IPPROTO_IP */
+  case IPPROTO_IP:
+    switch (optname) {
+    case IP_TTL:
+      sock->conn->pcb.ip->ttl = (u8_t)(*(int*)optval);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TTL, ..) -> %d\n",
+                  s, sock->conn->pcb.ip->ttl));
+      break;
+    case IP_TOS:
+      sock->conn->pcb.ip->tos = (u8_t)(*(int*)optval);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TOS, ..)-> %d\n",
+                  s, sock->conn->pcb.ip->tos));
+      break;
+#if LWIP_IGMP
+    case IP_MULTICAST_TTL:
+      sock->conn->pcb.udp->ttl = (u8_t)(*(u8_t*)optval);
+      break;
+    case IP_MULTICAST_IF:
+      sock->conn->pcb.udp->multicast_ip.addr = ((struct in_addr*) optval)->s_addr;
+      break;
+    case IP_ADD_MEMBERSHIP:
+    case IP_DROP_MEMBERSHIP:
+      {
+        /* If this is a TCP or a RAW socket, ignore these options. */
+        struct ip_mreq *imr = (struct ip_mreq *)optval;
+        if(optname == IP_ADD_MEMBERSHIP){
+          data->err = igmp_joingroup((struct ip_addr*)&(imr->imr_interface.s_addr), (struct ip_addr*)&(imr->imr_multiaddr.s_addr));
+        } else {
+          data->err = igmp_leavegroup((struct ip_addr*)&(imr->imr_interface.s_addr), (struct ip_addr*)&(imr->imr_multiaddr.s_addr));
+        }
+        if(data->err != ERR_OK) {
+          data->err = EADDRNOTAVAIL;
+        }
+      }
+      break;
+#endif /* LWIP_IGMP */
+    }  /* switch (optname) */
+    break;
+
+#if LWIP_TCP
+/* Level: IPPROTO_TCP */
+  case IPPROTO_TCP:
+    switch (optname) {
+    case TCP_NODELAY:
+      if (*(int*)optval) {
+        sock->conn->pcb.tcp->flags |= TF_NODELAY;
+      } else {
+        sock->conn->pcb.tcp->flags &= ~TF_NODELAY;
+      }
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) -> %s\n",
+                  s, (*(int *)optval)?"on":"off") );
+      break;
+    case TCP_KEEPALIVE:
+      sock->conn->pcb.tcp->keep_idle = (u32_t)(*(int*)optval);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %"U32_F"\n",
+                  s, sock->conn->pcb.tcp->keep_idle));
+      break;
+
+#if LWIP_TCP_KEEPALIVE
+    case TCP_KEEPIDLE:
+      sock->conn->pcb.tcp->keep_idle = 1000*(u32_t)(*(int*)optval);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) -> %"U32_F"\n",
+                  s, sock->conn->pcb.tcp->keep_idle));
+      break;
+    case TCP_KEEPINTVL:
+      sock->conn->pcb.tcp->keep_intvl = 1000*(u32_t)(*(int*)optval);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) -> %"U32_F"\n",
+                  s, sock->conn->pcb.tcp->keep_intvl));
+      break;
+    case TCP_KEEPCNT:
+      sock->conn->pcb.tcp->keep_cnt = (u32_t)(*(int*)optval);
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) -> %"U32_F"\n",
+                  s, sock->conn->pcb.tcp->keep_cnt));
+      break;
+#endif /* LWIP_TCP_KEEPALIVE */
+
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_TCP*/
+#if LWIP_UDP && LWIP_UDPLITE
+  /* Level: IPPROTO_UDPLITE */
+  case IPPROTO_UDPLITE:
+    switch (optname) {
+    case UDPLITE_SEND_CSCOV:
+      if ((*(int*)optval != 0) && (*(int*)optval < 8)) {
+        /* don't allow illegal values! */
+        sock->conn->pcb.udp->chksum_len_tx = 8;
+      } else {
+        sock->conn->pcb.udp->chksum_len_tx = *(int*)optval;
+      }
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) -> %d\n",
+                  s, (*(int*)optval)) );
+      break;
+    case UDPLITE_RECV_CSCOV:
+      if ((*(int*)optval != 0) && (*(int*)optval < 8)) {
+        /* don't allow illegal values! */
+        sock->conn->pcb.udp->chksum_len_rx = 8;
+      } else {
+        sock->conn->pcb.udp->chksum_len_rx = *(int*)optval;
+      }
+      LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) -> %d\n",
+                  s, (*(int*)optval)) );
+      break;
+    }  /* switch (optname) */
+    break;
+#endif /* LWIP_UDP */
+  }  /* switch (level) */
+  sys_sem_signal(sock->conn->op_completed);
+}
+
+int
+lwip_ioctl(int s, long cmd, void *argp)
+{
+  struct lwip_socket *sock = get_socket(s);
+  u16_t buflen = 0;
+  s16_t recv_avail;
+
+  if (!sock)
+    return -1;
+
+  switch (cmd) {
+  case FIONREAD:
+    if (!argp) {
+      sock_set_errno(sock, EINVAL);
+      return -1;
+    }
+
+    SYS_ARCH_GET(sock->conn->recv_avail, recv_avail);
+    if (recv_avail < 0)
+      recv_avail = 0;
+    *((u16_t*)argp) = (u16_t)recv_avail;
+
+    /* Check if there is data left from the last recv operation. /maq 041215 */
+    if (sock->lastdata) {
+      buflen = netbuf_len(sock->lastdata);
+      buflen -= sock->lastoffset;
+
+      *((u16_t*)argp) += buflen;
+    }
+
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %"U16_F"\n", s, argp, *((u16_t*)argp)));
+    sock_set_errno(sock, 0);
+    return 0;
+
+  case FIONBIO:
+    if (argp && *(u32_t*)argp)
+      sock->flags |= O_NONBLOCK;
+    else
+      sock->flags &= ~O_NONBLOCK;
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, !!(sock->flags & O_NONBLOCK)));
+    sock_set_errno(sock, 0);
+    return 0;
+
+  default:
+    LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, UNIMPL: 0x%lx, %p)\n", s, cmd, argp));
+    sock_set_errno(sock, ENOSYS); /* not yet implemented */
+    return -1;
+  } /* switch (cmd) */
+}
+
+#endif /* LWIP_SOCKET */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/api/tcpip.c b/firmware/x300/lwip/lwip-1.3.1/src/api/tcpip.c
new file mode 100644
index 000000000..002df90b2
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/api/tcpip.c
@@ -0,0 +1,596 @@
+/**
+ * @file
+ * Sequential API Main thread module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if !NO_SYS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sys.h"
+#include "lwip/memp.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_frag.h"
+#include "lwip/tcp.h"
+#include "lwip/autoip.h"
+#include "lwip/dhcp.h"
+#include "lwip/igmp.h"
+#include "lwip/dns.h"
+#include "lwip/tcpip.h"
+#include "lwip/init.h"
+#include "netif/etharp.h"
+#include "netif/ppp_oe.h"
+
+/* global variables */
+static void (* tcpip_init_done)(void *arg);
+static void *tcpip_init_done_arg;
+static sys_mbox_t mbox = SYS_MBOX_NULL;
+
+#if LWIP_TCPIP_CORE_LOCKING
+/** The global semaphore to lock the stack. */
+sys_sem_t lock_tcpip_core;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+
+#if LWIP_TCP
+/* global variable that shows if the tcp timer is currently scheduled or not */
+static int tcpip_tcp_timer_active;
+
+/**
+ * Timer callback function that calls tcp_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+tcpip_tcp_timer(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+
+  /* call TCP timer handler */
+  tcp_tmr();
+  /* timer still needed? */
+  if (tcp_active_pcbs || tcp_tw_pcbs) {
+    /* restart timer */
+    sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
+  } else {
+    /* disable timer */
+    tcpip_tcp_timer_active = 0;
+  }
+}
+
+#if !NO_SYS
+/**
+ * Called from TCP_REG when registering a new PCB:
+ * the reason is to have the TCP timer only running when
+ * there are active (or time-wait) PCBs.
+ */
+void
+tcp_timer_needed(void)
+{
+  /* timer is off but needed again? */
+  if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
+    /* enable and start timer */
+    tcpip_tcp_timer_active = 1;
+    sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
+  }
+}
+#endif /* !NO_SYS */
+#endif /* LWIP_TCP */
+
+#if IP_REASSEMBLY
+/**
+ * Timer callback function that calls ip_reass_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+ip_reass_timer(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: ip_reass_tmr()\n"));
+  ip_reass_tmr();
+  sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
+}
+#endif /* IP_REASSEMBLY */
+
+#if LWIP_ARP
+/**
+ * Timer callback function that calls etharp_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+arp_timer(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: etharp_tmr()\n"));
+  etharp_tmr();
+  sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
+}
+#endif /* LWIP_ARP */
+
+#if LWIP_DHCP
+/**
+ * Timer callback function that calls dhcp_coarse_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+dhcp_timer_coarse(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dhcp_coarse_tmr()\n"));
+  dhcp_coarse_tmr();
+  sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
+}
+
+/**
+ * Timer callback function that calls dhcp_fine_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+dhcp_timer_fine(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dhcp_fine_tmr()\n"));
+  dhcp_fine_tmr();
+  sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
+}
+#endif /* LWIP_DHCP */
+
+#if LWIP_AUTOIP
+/**
+ * Timer callback function that calls autoip_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+autoip_timer(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: autoip_tmr()\n"));
+  autoip_tmr();
+  sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
+}
+#endif /* LWIP_AUTOIP */
+
+#if LWIP_IGMP
+/**
+ * Timer callback function that calls igmp_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+igmp_timer(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: igmp_tmr()\n"));
+  igmp_tmr();
+  sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
+}
+#endif /* LWIP_IGMP */
+
+#if LWIP_DNS
+/**
+ * Timer callback function that calls dns_tmr() and reschedules itself.
+ *
+ * @param arg unused argument
+ */
+static void
+dns_timer(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dns_tmr()\n"));
+  dns_tmr();
+  sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
+}
+#endif /* LWIP_DNS */
+
+/**
+ * The main lwIP thread. This thread has exclusive access to lwIP core functions
+ * (unless access to them is not locked). Other threads communicate with this
+ * thread using message boxes.
+ *
+ * It also starts all the timers to make sure they are running in the right
+ * thread context.
+ *
+ * @param arg unused argument
+ */
+static void
+tcpip_thread(void *arg)
+{
+  struct tcpip_msg *msg;
+  LWIP_UNUSED_ARG(arg);
+
+#if IP_REASSEMBLY
+  sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
+#endif /* IP_REASSEMBLY */
+#if LWIP_ARP
+  sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
+#endif /* LWIP_ARP */
+#if LWIP_DHCP
+  sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
+  sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
+#endif /* LWIP_DHCP */
+#if LWIP_AUTOIP
+  sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
+#endif /* LWIP_AUTOIP */
+#if LWIP_IGMP
+  sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
+#endif /* LWIP_IGMP */
+#if LWIP_DNS
+  sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
+#endif /* LWIP_DNS */
+
+  if (tcpip_init_done != NULL) {
+    tcpip_init_done(tcpip_init_done_arg);
+  }
+
+  LOCK_TCPIP_CORE();
+  while (1) {                          /* MAIN Loop */
+    sys_mbox_fetch(mbox, (void *)&msg);
+    switch (msg->type) {
+#if LWIP_NETCONN
+    case TCPIP_MSG_API:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
+      msg->msg.apimsg->function(&(msg->msg.apimsg->msg));
+      break;
+#endif /* LWIP_NETCONN */
+
+    case TCPIP_MSG_INPKT:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg));
+#if LWIP_ARP
+      if (msg->msg.inp.netif->flags & NETIF_FLAG_ETHARP) {
+        ethernet_input(msg->msg.inp.p, msg->msg.inp.netif);
+      } else
+#endif /* LWIP_ARP */
+      { ip_input(msg->msg.inp.p, msg->msg.inp.netif);
+      }
+      memp_free(MEMP_TCPIP_MSG_INPKT, msg);
+      break;
+
+#if LWIP_NETIF_API
+    case TCPIP_MSG_NETIFAPI:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: Netif API message %p\n", (void *)msg));
+      msg->msg.netifapimsg->function(&(msg->msg.netifapimsg->msg));
+      break;
+#endif /* LWIP_NETIF_API */
+
+    case TCPIP_MSG_CALLBACK:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
+      msg->msg.cb.f(msg->msg.cb.ctx);
+      memp_free(MEMP_TCPIP_MSG_API, msg);
+      break;
+
+    case TCPIP_MSG_TIMEOUT:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg));
+      sys_timeout(msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg);
+      memp_free(MEMP_TCPIP_MSG_API, msg);
+      break;
+    case TCPIP_MSG_UNTIMEOUT:
+      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: UNTIMEOUT %p\n", (void *)msg));
+      sys_untimeout(msg->msg.tmo.h, msg->msg.tmo.arg);
+      memp_free(MEMP_TCPIP_MSG_API, msg);
+      break;
+
+    default:
+      break;
+    }
+  }
+}
+
+/**
+ * Pass a received packet to tcpip_thread for input processing
+ *
+ * @param p the received packet, p->payload pointing to the Ethernet header or
+ *          to an IP header (if netif doesn't got NETIF_FLAG_ETHARP flag)
+ * @param inp the network interface on which the packet was received
+ */
+err_t
+tcpip_input(struct pbuf *p, struct netif *inp)
+{
+  struct tcpip_msg *msg;
+
+  if (mbox != SYS_MBOX_NULL) {
+    msg = memp_malloc(MEMP_TCPIP_MSG_INPKT);
+    if (msg == NULL) {
+      return ERR_MEM;
+    }
+
+    msg->type = TCPIP_MSG_INPKT;
+    msg->msg.inp.p = p;
+    msg->msg.inp.netif = inp;
+    if (sys_mbox_trypost(mbox, msg) != ERR_OK) {
+      memp_free(MEMP_TCPIP_MSG_INPKT, msg);
+      return ERR_MEM;
+    }
+    return ERR_OK;
+  }
+  return ERR_VAL;
+}
+
+/**
+ * Call a specific function in the thread context of
+ * tcpip_thread for easy access synchronization.
+ * A function called in that way may access lwIP core code
+ * without fearing concurrent access.
+ *
+ * @param f the function to call
+ * @param ctx parameter passed to f
+ * @param block 1 to block until the request is posted, 0 to non-blocking mode
+ * @return ERR_OK if the function was called, another err_t if not
+ */
+err_t
+tcpip_callback_with_block(void (*f)(void *ctx), void *ctx, u8_t block)
+{
+  struct tcpip_msg *msg;
+
+  if (mbox != SYS_MBOX_NULL) {
+    msg = memp_malloc(MEMP_TCPIP_MSG_API);
+    if (msg == NULL) {
+      return ERR_MEM;
+    }
+
+    msg->type = TCPIP_MSG_CALLBACK;
+    msg->msg.cb.f = f;
+    msg->msg.cb.ctx = ctx;
+    if (block) {
+      sys_mbox_post(mbox, msg);
+    } else {
+      if (sys_mbox_trypost(mbox, msg) != ERR_OK) {
+        memp_free(MEMP_TCPIP_MSG_API, msg);
+        return ERR_MEM;
+      }
+    }
+    return ERR_OK;
+  }
+  return ERR_VAL;
+}
+
+/**
+ * call sys_timeout in tcpip_thread
+ *
+ * @param msec time in miliseconds for timeout
+ * @param h function to be called on timeout
+ * @param arg argument to pass to timeout function h
+ * @return ERR_MEM on memory error, ERR_OK otherwise
+ */
+err_t
+tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
+{
+  struct tcpip_msg *msg;
+
+  if (mbox != SYS_MBOX_NULL) {
+    msg = memp_malloc(MEMP_TCPIP_MSG_API);
+    if (msg == NULL) {
+      return ERR_MEM;
+    }
+
+    msg->type = TCPIP_MSG_TIMEOUT;
+    msg->msg.tmo.msecs = msecs;
+    msg->msg.tmo.h = h;
+    msg->msg.tmo.arg = arg;
+    sys_mbox_post(mbox, msg);
+    return ERR_OK;
+  }
+  return ERR_VAL;
+}
+
+/**
+ * call sys_untimeout in tcpip_thread
+ *
+ * @param msec time in miliseconds for timeout
+ * @param h function to be called on timeout
+ * @param arg argument to pass to timeout function h
+ * @return ERR_MEM on memory error, ERR_OK otherwise
+ */
+err_t
+tcpip_untimeout(sys_timeout_handler h, void *arg)
+{
+  struct tcpip_msg *msg;
+
+  if (mbox != SYS_MBOX_NULL) {
+    msg = memp_malloc(MEMP_TCPIP_MSG_API);
+    if (msg == NULL) {
+      return ERR_MEM;
+    }
+
+    msg->type = TCPIP_MSG_UNTIMEOUT;
+    msg->msg.tmo.h = h;
+    msg->msg.tmo.arg = arg;
+    sys_mbox_post(mbox, msg);
+    return ERR_OK;
+  }
+  return ERR_VAL;
+}
+
+#if LWIP_NETCONN
+/**
+ * Call the lower part of a netconn_* function
+ * This function is then running in the thread context
+ * of tcpip_thread and has exclusive access to lwIP core code.
+ *
+ * @param apimsg a struct containing the function to call and its parameters
+ * @return ERR_OK if the function was called, another err_t if not
+ */
+err_t
+tcpip_apimsg(struct api_msg *apimsg)
+{
+  struct tcpip_msg msg;
+  
+  if (mbox != SYS_MBOX_NULL) {
+    msg.type = TCPIP_MSG_API;
+    msg.msg.apimsg = apimsg;
+    sys_mbox_post(mbox, &msg);
+    sys_arch_sem_wait(apimsg->msg.conn->op_completed, 0);
+    return ERR_OK;
+  }
+  return ERR_VAL;
+}
+
+#if LWIP_TCPIP_CORE_LOCKING
+/**
+ * Call the lower part of a netconn_* function
+ * This function has exclusive access to lwIP core code by locking it
+ * before the function is called.
+ *
+ * @param apimsg a struct containing the function to call and its parameters
+ * @return ERR_OK (only for compatibility fo tcpip_apimsg())
+ */
+err_t
+tcpip_apimsg_lock(struct api_msg *apimsg)
+{
+  LOCK_TCPIP_CORE();
+  apimsg->function(&(apimsg->msg));
+  UNLOCK_TCPIP_CORE();
+  return ERR_OK;
+
+}
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+#endif /* LWIP_NETCONN */
+
+#if LWIP_NETIF_API
+#if !LWIP_TCPIP_CORE_LOCKING
+/**
+ * Much like tcpip_apimsg, but calls the lower part of a netifapi_*
+ * function.
+ *
+ * @param netifapimsg a struct containing the function to call and its parameters
+ * @return error code given back by the function that was called
+ */
+err_t
+tcpip_netifapi(struct netifapi_msg* netifapimsg)
+{
+  struct tcpip_msg msg;
+  
+  if (mbox != SYS_MBOX_NULL) {
+    netifapimsg->msg.sem = sys_sem_new(0);
+    if (netifapimsg->msg.sem == SYS_SEM_NULL) {
+      netifapimsg->msg.err = ERR_MEM;
+      return netifapimsg->msg.err;
+    }
+    
+    msg.type = TCPIP_MSG_NETIFAPI;
+    msg.msg.netifapimsg = netifapimsg;
+    sys_mbox_post(mbox, &msg);
+    sys_sem_wait(netifapimsg->msg.sem);
+    sys_sem_free(netifapimsg->msg.sem);
+    return netifapimsg->msg.err;
+  }
+  return ERR_VAL;
+}
+#else /* !LWIP_TCPIP_CORE_LOCKING */
+/**
+ * Call the lower part of a netifapi_* function
+ * This function has exclusive access to lwIP core code by locking it
+ * before the function is called.
+ *
+ * @param netifapimsg a struct containing the function to call and its parameters
+ * @return ERR_OK (only for compatibility fo tcpip_netifapi())
+ */
+err_t
+tcpip_netifapi_lock(struct netifapi_msg* netifapimsg)
+{
+  LOCK_TCPIP_CORE();  
+  netifapimsg->function(&(netifapimsg->msg));
+  UNLOCK_TCPIP_CORE();
+  return netifapimsg->msg.err;
+}
+#endif /* !LWIP_TCPIP_CORE_LOCKING */
+#endif /* LWIP_NETIF_API */
+
+/**
+ * Initialize this module:
+ * - initialize all sub modules
+ * - start the tcpip_thread
+ *
+ * @param initfunc a function to call when tcpip_thread is running and finished initializing
+ * @param arg argument to pass to initfunc
+ */
+void
+tcpip_init(void (* initfunc)(void *), void *arg)
+{
+  lwip_init();
+
+  tcpip_init_done = initfunc;
+  tcpip_init_done_arg = arg;
+  mbox = sys_mbox_new(TCPIP_MBOX_SIZE);
+#if LWIP_TCPIP_CORE_LOCKING
+  lock_tcpip_core = sys_sem_new(1);
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+
+  sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO);
+}
+
+/**
+ * Simple callback function used with tcpip_callback to free a pbuf
+ * (pbuf_free has a wrong signature for tcpip_callback)
+ *
+ * @param p The pbuf (chain) to be dereferenced.
+ */
+static void
+pbuf_free_int(void *p)
+{
+  struct pbuf *q = p;
+  pbuf_free(q);
+}
+
+/**
+ * A simple wrapper function that allows you to free a pbuf from interrupt context.
+ *
+ * @param p The pbuf (chain) to be dereferenced.
+ * @return ERR_OK if callback could be enqueued, an err_t if not
+ */
+err_t
+pbuf_free_callback(struct pbuf *p)
+{
+  return tcpip_callback_with_block(pbuf_free_int, p, 0);
+}
+
+/**
+ * A simple wrapper function that allows you to free heap memory from
+ * interrupt context.
+ *
+ * @param m the heap memory to free
+ * @return ERR_OK if callback could be enqueued, an err_t if not
+ */
+err_t
+mem_free_callback(void *m)
+{
+  return tcpip_callback_with_block(mem_free, m, 0);
+}
+
+#endif /* !NO_SYS */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/dhcp.c b/firmware/x300/lwip/lwip-1.3.1/src/core/dhcp.c
new file mode 100644
index 000000000..df0f97881
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/dhcp.c
@@ -0,0 +1,1633 @@
+/**
+ * @file
+ * Dynamic Host Configuration Protocol client
+ *
+ */
+
+/*
+ *
+ * Copyright (c) 2001-2004 Leon Woestenberg <leon.woestenberg@gmx.net>
+ * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is a contribution to the lwIP TCP/IP stack.
+ * The Swedish Institute of Computer Science and Adam Dunkels
+ * are specifically granted permission to redistribute this
+ * source code.
+ *
+ * Author: Leon Woestenberg <leon.woestenberg@gmx.net>
+ *
+ * This is a DHCP client for the lwIP TCP/IP stack. It aims to conform
+ * with RFC 2131 and RFC 2132.
+ *
+ * TODO:
+ * - Proper parsing of DHCP messages exploiting file/sname field overloading.
+ * - Add JavaDoc style documentation (API, internals).
+ * - Support for interfaces other than Ethernet (SLIP, PPP, ...)
+ *
+ * Please coordinate changes and requests with Leon Woestenberg
+ * <leon.woestenberg@gmx.net>
+ *
+ * Integration with your code:
+ *
+ * In lwip/dhcp.h
+ * #define DHCP_COARSE_TIMER_SECS (recommended 60 which is a minute)
+ * #define DHCP_FINE_TIMER_MSECS (recommended 500 which equals TCP coarse timer)
+ *
+ * Then have your application call dhcp_coarse_tmr() and
+ * dhcp_fine_tmr() on the defined intervals.
+ *
+ * dhcp_start(struct netif *netif);
+ * starts a DHCP client instance which configures the interface by
+ * obtaining an IP address lease and maintaining it.
+ *
+ * Use dhcp_release(netif) to end the lease and use dhcp_stop(netif)
+ * to remove the DHCP client.
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_DHCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/stats.h"
+#include "lwip/mem.h"
+#include "lwip/udp.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/inet.h"
+#include "lwip/sys.h"
+#include "lwip/dhcp.h"
+#include "lwip/autoip.h"
+#include "lwip/dns.h"
+#include "netif/etharp.h"
+
+#include <string.h>
+
+/** Default for DHCP_GLOBAL_XID is 0xABCD0000
+ * This can be changed by defining DHCP_GLOBAL_XID and DHCP_GLOBAL_XID_HEADER, e.g.
+ *  #define DHCP_GLOBAL_XID_HEADER "stdlib.h"
+ *  #define DHCP_GLOBAL_XID rand()
+ */
+#ifdef DHCP_GLOBAL_XID_HEADER
+#include DHCP_GLOBAL_XID_HEADER /* include optional starting XID generation prototypes */
+#endif
+
+/** DHCP_OPTION_MAX_MSG_SIZE is set to the MTU
+ * MTU is checked to be big enough in dhcp_start */
+#define DHCP_MAX_MSG_LEN(netif)        (netif->mtu)
+#define DHCP_MAX_MSG_LEN_MIN_REQUIRED  576
+
+/* DHCP client state machine functions */
+static void dhcp_handle_ack(struct netif *netif);
+static void dhcp_handle_nak(struct netif *netif);
+static void dhcp_handle_offer(struct netif *netif);
+
+static err_t dhcp_discover(struct netif *netif);
+static err_t dhcp_select(struct netif *netif);
+static void dhcp_check(struct netif *netif);
+static void dhcp_bind(struct netif *netif);
+#if DHCP_DOES_ARP_CHECK
+static err_t dhcp_decline(struct netif *netif);
+#endif /* DHCP_DOES_ARP_CHECK */
+static err_t dhcp_rebind(struct netif *netif);
+static void dhcp_set_state(struct dhcp *dhcp, u8_t new_state);
+
+/* receive, unfold, parse and free incoming messages */
+static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port);
+static err_t dhcp_unfold_reply(struct dhcp *dhcp);
+static u8_t *dhcp_get_option_ptr(struct dhcp *dhcp, u8_t option_type);
+static u8_t dhcp_get_option_byte(u8_t *ptr);
+#if 0
+static u16_t dhcp_get_option_short(u8_t *ptr);
+#endif
+static u32_t dhcp_get_option_long(u8_t *ptr);
+static void dhcp_free_reply(struct dhcp *dhcp);
+
+/* set the DHCP timers */
+static void dhcp_timeout(struct netif *netif);
+static void dhcp_t1_timeout(struct netif *netif);
+static void dhcp_t2_timeout(struct netif *netif);
+
+/* build outgoing messages */
+/* create a DHCP request, fill in common headers */
+static err_t dhcp_create_request(struct netif *netif);
+/* free a DHCP request */
+static void dhcp_delete_request(struct netif *netif);
+/* add a DHCP option (type, then length in bytes) */
+static void dhcp_option(struct dhcp *dhcp, u8_t option_type, u8_t option_len);
+/* add option values */
+static void dhcp_option_byte(struct dhcp *dhcp, u8_t value);
+static void dhcp_option_short(struct dhcp *dhcp, u16_t value);
+static void dhcp_option_long(struct dhcp *dhcp, u32_t value);
+/* always add the DHCP options trailer to end and pad */
+static void dhcp_option_trailer(struct dhcp *dhcp);
+
+/**
+ * Back-off the DHCP client (because of a received NAK response).
+ *
+ * Back-off the DHCP client because of a received NAK. Receiving a
+ * NAK means the client asked for something non-sensible, for
+ * example when it tries to renew a lease obtained on another network.
+ *
+ * We clear any existing set IP address and restart DHCP negotiation
+ * afresh (as per RFC2131 3.2.3).
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_handle_nak(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_handle_nak(netif=%p) %c%c%"U16_F"\n", 
+    (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+  /* Set the interface down since the address must no longer be used, as per RFC2131 */
+  netif_set_down(netif);
+  /* remove IP address from interface */
+  netif_set_ipaddr(netif, IP_ADDR_ANY);
+  netif_set_gw(netif, IP_ADDR_ANY);
+  netif_set_netmask(netif, IP_ADDR_ANY); 
+  /* Change to a defined state */
+  dhcp_set_state(dhcp, DHCP_BACKING_OFF);
+  /* We can immediately restart discovery */
+  dhcp_discover(netif);
+}
+
+/**
+ * Checks if the offered IP address is already in use.
+ *
+ * It does so by sending an ARP request for the offered address and
+ * entering CHECKING state. If no ARP reply is received within a small
+ * interval, the address is assumed to be free for use by us.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_check(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  err_t result;
+  u16_t msecs;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_check(netif=%p) %c%c\n", (void *)netif, (s16_t)netif->name[0],
+    (s16_t)netif->name[1]));
+  dhcp_set_state(dhcp, DHCP_CHECKING);
+  /* create an ARP query for the offered IP address, expecting that no host
+     responds, as the IP address should not be in use. */
+  result = etharp_query(netif, &dhcp->offered_ip_addr, NULL);
+  if (result != ERR_OK) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_check: could not perform ARP query\n"));
+  }
+  dhcp->tries++;
+  msecs = 500;
+  dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_check(): set request timeout %"U16_F" msecs\n", msecs));
+}
+
+/**
+ * Remember the configuration offered by a DHCP server.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_handle_offer(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  /* obtain the server address */
+  u8_t *option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_SERVER_ID);
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_handle_offer(netif=%p) %c%c%"U16_F"\n",
+    (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+  if (option_ptr != NULL) {
+    dhcp->server_ip_addr.addr = htonl(dhcp_get_option_long(&option_ptr[2]));
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_handle_offer(): server 0x%08"X32_F"\n", dhcp->server_ip_addr.addr));
+    /* remember offered address */
+    ip_addr_set(&dhcp->offered_ip_addr, (struct ip_addr *)&dhcp->msg_in->yiaddr);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_handle_offer(): offer for 0x%08"X32_F"\n", dhcp->offered_ip_addr.addr));
+
+    dhcp_select(netif);
+  }
+}
+
+/**
+ * Select a DHCP server offer out of all offers.
+ *
+ * Simply select the first offer received.
+ *
+ * @param netif the netif under DHCP control
+ * @return lwIP specific error (see error.h)
+ */
+static err_t
+dhcp_select(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  err_t result;
+  u16_t msecs;
+#if LWIP_NETIF_HOSTNAME
+  const char *p;
+#endif /* LWIP_NETIF_HOSTNAME */
+
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_select(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+  dhcp_set_state(dhcp, DHCP_REQUESTING);
+
+  /* create and initialize the DHCP message header */
+  result = dhcp_create_request(netif);
+  if (result == ERR_OK) {
+    dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+    dhcp_option_byte(dhcp, DHCP_REQUEST);
+
+    dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+    dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+    /* MUST request the offered IP address */
+    dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+    dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr));
+
+    dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4);
+    dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr));
+
+    dhcp_option(dhcp, DHCP_OPTION_PARAMETER_REQUEST_LIST, 4/*num options*/);
+    dhcp_option_byte(dhcp, DHCP_OPTION_SUBNET_MASK);
+    dhcp_option_byte(dhcp, DHCP_OPTION_ROUTER);
+    dhcp_option_byte(dhcp, DHCP_OPTION_BROADCAST);
+    dhcp_option_byte(dhcp, DHCP_OPTION_DNS_SERVER);
+
+#if LWIP_NETIF_HOSTNAME
+    p = (const char*)netif->hostname;
+    if (p != NULL) {
+      dhcp_option(dhcp, DHCP_OPTION_HOSTNAME, strlen(p));
+      while (*p) {
+        dhcp_option_byte(dhcp, *p++);
+      }
+    }
+#endif /* LWIP_NETIF_HOSTNAME */
+
+    dhcp_option_trailer(dhcp);
+    /* shrink the pbuf to the actual content length */
+    pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+    /* TODO: we really should bind to a specific local interface here
+       but we cannot specify an unconfigured netif as it is addressless */
+    /* send broadcast to any DHCP server */
+    udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+    /* reconnect to any (or to server here?!) */
+    udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
+    dhcp_delete_request(netif);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_select: REQUESTING\n"));
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_select: could not allocate DHCP request\n"));
+  }
+  dhcp->tries++;
+  msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
+  dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_select(): set request timeout %"U16_F" msecs\n", msecs));
+  return result;
+}
+
+/**
+ * The DHCP timer that checks for lease renewal/rebind timeouts.
+ *
+ */
+void
+dhcp_coarse_tmr()
+{
+  struct netif *netif = netif_list;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_coarse_tmr()\n"));
+  /* iterate through all network interfaces */
+  while (netif != NULL) {
+    /* only act on DHCP configured interfaces */
+    if (netif->dhcp != NULL) {
+      /* timer is active (non zero), and triggers (zeroes) now? */
+      if (netif->dhcp->t2_timeout-- == 1) {
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_coarse_tmr(): t2 timeout\n"));
+        /* this clients' rebind timeout triggered */
+        dhcp_t2_timeout(netif);
+      /* timer is active (non zero), and triggers (zeroes) now */
+      } else if (netif->dhcp->t1_timeout-- == 1) {
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_coarse_tmr(): t1 timeout\n"));
+        /* this clients' renewal timeout triggered */
+        dhcp_t1_timeout(netif);
+      }
+    }
+    /* proceed to next netif */
+    netif = netif->next;
+  }
+}
+
+/**
+ * DHCP transaction timeout handling
+ *
+ * A DHCP server is expected to respond within a short period of time.
+ * This timer checks whether an outstanding DHCP request is timed out.
+ * 
+ */
+void
+dhcp_fine_tmr()
+{
+  struct netif *netif = netif_list;
+  /* loop through netif's */
+  while (netif != NULL) {
+    /* only act on DHCP configured interfaces */
+    if (netif->dhcp != NULL) {
+      /* timer is active (non zero), and is about to trigger now */      
+      if (netif->dhcp->request_timeout > 1) {
+        netif->dhcp->request_timeout--;
+      }
+      else if (netif->dhcp->request_timeout == 1) {
+        netif->dhcp->request_timeout--;
+        /* { netif->dhcp->request_timeout == 0 } */
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_fine_tmr(): request timeout\n"));
+        /* this clients' request timeout triggered */
+        dhcp_timeout(netif);
+      }
+    }
+    /* proceed to next network interface */
+    netif = netif->next;
+  }
+}
+
+/**
+ * A DHCP negotiation transaction, or ARP request, has timed out.
+ *
+ * The timer that was started with the DHCP or ARP request has
+ * timed out, indicating no response was received in time.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_timeout(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_timeout()\n"));
+  /* back-off period has passed, or server selection timed out */
+  if ((dhcp->state == DHCP_BACKING_OFF) || (dhcp->state == DHCP_SELECTING)) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_timeout(): restarting discovery\n"));
+    dhcp_discover(netif);
+  /* receiving the requested lease timed out */
+  } else if (dhcp->state == DHCP_REQUESTING) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REQUESTING, DHCP request timed out\n"));
+    if (dhcp->tries <= 5) {
+      dhcp_select(netif);
+    } else {
+      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REQUESTING, releasing, restarting\n"));
+      dhcp_release(netif);
+      dhcp_discover(netif);
+    }
+  /* received no ARP reply for the offered address (which is good) */
+  } else if (dhcp->state == DHCP_CHECKING) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): CHECKING, ARP request timed out\n"));
+    if (dhcp->tries <= 1) {
+      dhcp_check(netif);
+    /* no ARP replies on the offered address,
+       looks like the IP address is indeed free */
+    } else {
+      /* bind the interface to the offered address */
+      dhcp_bind(netif);
+    }
+  }
+  /* did not get response to renew request? */
+  else if (dhcp->state == DHCP_RENEWING) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): RENEWING, DHCP request timed out\n"));
+    /* just retry renewal */
+    /* note that the rebind timer will eventually time-out if renew does not work */
+    dhcp_renew(netif);
+  /* did not get response to rebind request? */
+  } else if (dhcp->state == DHCP_REBINDING) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): REBINDING, DHCP request timed out\n"));
+    if (dhcp->tries <= 8) {
+      dhcp_rebind(netif);
+    } else {
+      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_timeout(): RELEASING, DISCOVERING\n"));
+      dhcp_release(netif);
+      dhcp_discover(netif);
+    }
+  }
+}
+
+/**
+ * The renewal period has timed out.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_t1_timeout(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_t1_timeout()\n"));
+  if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) || (dhcp->state == DHCP_RENEWING)) {
+    /* just retry to renew - note that the rebind timer (t2) will
+     * eventually time-out if renew tries fail. */
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_t1_timeout(): must renew\n"));
+    dhcp_renew(netif);
+  }
+}
+
+/**
+ * The rebind period has timed out.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_t2_timeout(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_t2_timeout()\n"));
+  if ((dhcp->state == DHCP_REQUESTING) || (dhcp->state == DHCP_BOUND) || (dhcp->state == DHCP_RENEWING)) {
+    /* just retry to rebind */
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_t2_timeout(): must rebind\n"));
+    dhcp_rebind(netif);
+  }
+}
+
+/**
+ * Handle a DHCP ACK packet
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_handle_ack(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  u8_t *option_ptr;
+  /* clear options we might not get from the ACK */
+  dhcp->offered_sn_mask.addr = 0;
+  dhcp->offered_gw_addr.addr = 0;
+  dhcp->offered_bc_addr.addr = 0;
+
+  /* lease time given? */
+  option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_LEASE_TIME);
+  if (option_ptr != NULL) {
+    /* remember offered lease time */
+    dhcp->offered_t0_lease = dhcp_get_option_long(option_ptr + 2);
+  }
+  /* renewal period given? */
+  option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_T1);
+  if (option_ptr != NULL) {
+    /* remember given renewal period */
+    dhcp->offered_t1_renew = dhcp_get_option_long(option_ptr + 2);
+  } else {
+    /* calculate safe periods for renewal */
+    dhcp->offered_t1_renew = dhcp->offered_t0_lease / 2;
+  }
+
+  /* renewal period given? */
+  option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_T2);
+  if (option_ptr != NULL) {
+    /* remember given rebind period */
+    dhcp->offered_t2_rebind = dhcp_get_option_long(option_ptr + 2);
+  } else {
+    /* calculate safe periods for rebinding */
+    dhcp->offered_t2_rebind = dhcp->offered_t0_lease;
+  }
+
+  /* (y)our internet address */
+  ip_addr_set(&dhcp->offered_ip_addr, &dhcp->msg_in->yiaddr);
+
+/**
+ * Patch #1308
+ * TODO: we must check if the file field is not overloaded by DHCP options!
+ */
+#if 0
+  /* boot server address */
+  ip_addr_set(&dhcp->offered_si_addr, &dhcp->msg_in->siaddr);
+  /* boot file name */
+  if (dhcp->msg_in->file[0]) {
+    dhcp->boot_file_name = mem_malloc(strlen(dhcp->msg_in->file) + 1);
+    strcpy(dhcp->boot_file_name, dhcp->msg_in->file);
+  }
+#endif
+
+  /* subnet mask */
+  option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_SUBNET_MASK);
+  /* subnet mask given? */
+  if (option_ptr != NULL) {
+    dhcp->offered_sn_mask.addr = htonl(dhcp_get_option_long(&option_ptr[2]));
+  }
+
+  /* gateway router */
+  option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_ROUTER);
+  if (option_ptr != NULL) {
+    dhcp->offered_gw_addr.addr = htonl(dhcp_get_option_long(&option_ptr[2]));
+  }
+
+  /* broadcast address */
+  option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_BROADCAST);
+  if (option_ptr != NULL) {
+    dhcp->offered_bc_addr.addr = htonl(dhcp_get_option_long(&option_ptr[2]));
+  }
+  
+  /* DNS servers */
+  option_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_DNS_SERVER);
+  if (option_ptr != NULL) {
+    u8_t n;
+    dhcp->dns_count = dhcp_get_option_byte(&option_ptr[1]) / (u32_t)sizeof(struct ip_addr);
+    /* limit to at most DHCP_MAX_DNS DNS servers */
+    if (dhcp->dns_count > DHCP_MAX_DNS)
+      dhcp->dns_count = DHCP_MAX_DNS;
+    for (n = 0; n < dhcp->dns_count; n++) {
+      dhcp->offered_dns_addr[n].addr = htonl(dhcp_get_option_long(&option_ptr[2 + n * 4]));
+#if LWIP_DNS
+      dns_setserver( n, (struct ip_addr *)(&(dhcp->offered_dns_addr[n].addr)));
+#endif /* LWIP_DNS */
+    }
+#if LWIP_DNS
+    dns_setserver( n, (struct ip_addr *)(&ip_addr_any));
+#endif /* LWIP_DNS */
+  }
+}
+
+/**
+ * Start DHCP negotiation for a network interface.
+ *
+ * If no DHCP client instance was attached to this interface,
+ * a new client is created first. If a DHCP client instance
+ * was already present, it restarts negotiation.
+ *
+ * @param netif The lwIP network interface
+ * @return lwIP error code
+ * - ERR_OK - No error
+ * - ERR_MEM - Out of memory
+ */
+err_t
+dhcp_start(struct netif *netif)
+{
+  struct dhcp *dhcp;
+  err_t result = ERR_OK;
+
+  LWIP_ERROR("netif != NULL", (netif != NULL), return ERR_ARG;);
+  dhcp = netif->dhcp;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_start(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+  /* Remove the flag that says this netif is handled by DHCP,
+     it is set when we succeeded starting. */
+  netif->flags &= ~NETIF_FLAG_DHCP;
+
+  /* check MTU of the netif */
+  if (netif->mtu < DHCP_MAX_MSG_LEN_MIN_REQUIRED) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): Cannot use this netif with DHCP: MTU is too small\n"));
+    return ERR_MEM;
+  }
+
+  /* no DHCP client attached yet? */
+  if (dhcp == NULL) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): starting new DHCP client\n"));
+    dhcp = mem_malloc(sizeof(struct dhcp));
+    if (dhcp == NULL) {
+      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): could not allocate dhcp\n"));
+      return ERR_MEM;
+    }
+    /* store this dhcp client in the netif */
+    netif->dhcp = dhcp;
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): allocated dhcp"));
+  /* already has DHCP client attached */
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 3, ("dhcp_start(): restarting DHCP configuration\n"));
+    if (dhcp->pcb != NULL) {
+      udp_remove(dhcp->pcb);
+    }
+    if (dhcp->p != NULL) {
+      pbuf_free(dhcp->p);
+    }
+  }
+    
+  /* clear data structure */
+  memset(dhcp, 0, sizeof(struct dhcp));
+  /* allocate UDP PCB */
+  dhcp->pcb = udp_new();
+  if (dhcp->pcb == NULL) {
+    LWIP_DEBUGF(DHCP_DEBUG  | LWIP_DBG_TRACE, ("dhcp_start(): could not obtain pcb\n"));
+    mem_free((void *)dhcp);
+    netif->dhcp = dhcp = NULL;
+    return ERR_MEM;
+  }
+#if IP_SOF_BROADCAST
+  dhcp->pcb->so_options|=SOF_BROADCAST;
+#endif /* IP_SOF_BROADCAST */
+  /* set up local and remote port for the pcb */
+  udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT);
+  udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
+  /* set up the recv callback and argument */
+  udp_recv(dhcp->pcb, dhcp_recv, netif);
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_start(): starting DHCP configuration\n"));
+  /* (re)start the DHCP negotiation */
+  result = dhcp_discover(netif);
+  if (result != ERR_OK) {
+    /* free resources allocated above */
+    dhcp_stop(netif);
+    return ERR_MEM;
+  }
+  /* Set the flag that says this netif is handled by DHCP. */
+  netif->flags |= NETIF_FLAG_DHCP;
+  return result;
+}
+
+/**
+ * Inform a DHCP server of our manual configuration.
+ *
+ * This informs DHCP servers of our fixed IP address configuration
+ * by sending an INFORM message. It does not involve DHCP address
+ * configuration, it is just here to be nice to the network.
+ *
+ * @param netif The lwIP network interface
+ */
+void
+dhcp_inform(struct netif *netif)
+{
+  struct dhcp *dhcp, *old_dhcp = netif->dhcp;
+  err_t result = ERR_OK;
+  dhcp = mem_malloc(sizeof(struct dhcp));
+  if (dhcp == NULL) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_inform(): could not allocate dhcp\n"));
+    return;
+  }
+  netif->dhcp = dhcp;
+  memset(dhcp, 0, sizeof(struct dhcp));
+
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_inform(): allocated dhcp\n"));
+  dhcp->pcb = udp_new();
+  if (dhcp->pcb == NULL) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_inform(): could not obtain pcb"));
+    mem_free((void *)dhcp);
+    return;
+  }
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_inform(): created new udp pcb\n"));
+  /* create and initialize the DHCP message header */
+  result = dhcp_create_request(netif);
+  if (result == ERR_OK) {
+
+    dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+    dhcp_option_byte(dhcp, DHCP_INFORM);
+
+    dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+    dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+    dhcp_option_trailer(dhcp);
+
+    pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+#if IP_SOF_BROADCAST
+    dhcp->pcb->so_options|=SOF_BROADCAST;
+#endif /* IP_SOF_BROADCAST */
+    udp_bind(dhcp->pcb, IP_ADDR_ANY, DHCP_CLIENT_PORT);
+    udp_connect(dhcp->pcb, IP_ADDR_BROADCAST, DHCP_SERVER_PORT);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_inform: INFORMING\n"));
+    udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+    udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
+    dhcp_delete_request(netif);
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_inform: could not allocate DHCP request\n"));
+  }
+
+  if (dhcp->pcb != NULL) {
+    udp_remove(dhcp->pcb);
+  }
+  dhcp->pcb = NULL;
+  mem_free((void *)dhcp);
+  netif->dhcp = old_dhcp;
+}
+
+#if DHCP_DOES_ARP_CHECK
+/**
+ * Match an ARP reply with the offered IP address.
+ *
+ * @param netif the network interface on which the reply was received
+ * @param addr The IP address we received a reply from
+ */
+void dhcp_arp_reply(struct netif *netif, struct ip_addr *addr)
+{
+  LWIP_ERROR("netif != NULL", (netif != NULL), return;);
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_arp_reply()\n"));
+  /* is a DHCP client doing an ARP check? */
+  if ((netif->dhcp != NULL) && (netif->dhcp->state == DHCP_CHECKING)) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_arp_reply(): CHECKING, arp reply for 0x%08"X32_F"\n", addr->addr));
+    /* did a host respond with the address we
+       were offered by the DHCP server? */
+    if (ip_addr_cmp(addr, &netif->dhcp->offered_ip_addr)) {
+      /* we will not accept the offered address */
+      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 1, ("dhcp_arp_reply(): arp reply matched with offered address, declining\n"));
+      dhcp_decline(netif);
+    }
+  }
+}
+
+/**
+ * Decline an offered lease.
+ *
+ * Tell the DHCP server we do not accept the offered address.
+ * One reason to decline the lease is when we find out the address
+ * is already in use by another host (through ARP).
+ *
+ * @param netif the netif under DHCP control
+ */
+static err_t
+dhcp_decline(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  err_t result = ERR_OK;
+  u16_t msecs;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_decline()\n"));
+  dhcp_set_state(dhcp, DHCP_BACKING_OFF);
+  /* create and initialize the DHCP message header */
+  result = dhcp_create_request(netif);
+  if (result == ERR_OK) {
+    dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+    dhcp_option_byte(dhcp, DHCP_DECLINE);
+
+    dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+    dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr));
+
+    dhcp_option_trailer(dhcp);
+    /* resize pbuf to reflect true size of options */
+    pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+    /* @todo: should we really connect here? we are performing sendto() */
+    udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
+    /* per section 4.4.4, broadcast DECLINE messages */
+    udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+    dhcp_delete_request(netif);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_decline: BACKING OFF\n"));
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_decline: could not allocate DHCP request\n"));
+  }
+  dhcp->tries++;
+  msecs = 10*1000;
+  dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_decline(): set request timeout %"U16_F" msecs\n", msecs));
+  return result;
+}
+#endif
+
+
+/**
+ * Start the DHCP process, discover a DHCP server.
+ *
+ * @param netif the netif under DHCP control
+ */
+static err_t
+dhcp_discover(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  err_t result = ERR_OK;
+  u16_t msecs;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_discover()\n"));
+  ip_addr_set(&dhcp->offered_ip_addr, IP_ADDR_ANY);
+  dhcp_set_state(dhcp, DHCP_SELECTING);
+  /* create and initialize the DHCP message header */
+  result = dhcp_create_request(netif);
+  if (result == ERR_OK) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: making request\n"));
+    dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+    dhcp_option_byte(dhcp, DHCP_DISCOVER);
+
+    dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+    dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+    dhcp_option(dhcp, DHCP_OPTION_PARAMETER_REQUEST_LIST, 4/*num options*/);
+    dhcp_option_byte(dhcp, DHCP_OPTION_SUBNET_MASK);
+    dhcp_option_byte(dhcp, DHCP_OPTION_ROUTER);
+    dhcp_option_byte(dhcp, DHCP_OPTION_BROADCAST);
+    dhcp_option_byte(dhcp, DHCP_OPTION_DNS_SERVER);
+
+    dhcp_option_trailer(dhcp);
+
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: realloc()ing\n"));
+    pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+    udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: sendto(DISCOVER, IP_ADDR_BROADCAST, DHCP_SERVER_PORT)\n"));
+    udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_discover: deleting()ing\n"));
+    dhcp_delete_request(netif);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover: SELECTING\n"));
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_discover: could not allocate DHCP request\n"));
+  }
+  dhcp->tries++;
+#if LWIP_DHCP_AUTOIP_COOP
+  if(dhcp->tries >= LWIP_DHCP_AUTOIP_COOP_TRIES && dhcp->autoip_coop_state == DHCP_AUTOIP_COOP_STATE_OFF) {
+    dhcp->autoip_coop_state = DHCP_AUTOIP_COOP_STATE_ON;
+    autoip_start(netif);
+  }
+#endif /* LWIP_DHCP_AUTOIP_COOP */
+  msecs = (dhcp->tries < 6 ? 1 << dhcp->tries : 60) * 1000;
+  dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_discover(): set request timeout %"U16_F" msecs\n", msecs));
+  return result;
+}
+
+
+/**
+ * Bind the interface to the offered IP address.
+ *
+ * @param netif network interface to bind to the offered address
+ */
+static void
+dhcp_bind(struct netif *netif)
+{
+  u32_t timeout;
+  struct dhcp *dhcp;
+  struct ip_addr sn_mask, gw_addr;
+  LWIP_ERROR("dhcp_bind: netif != NULL", (netif != NULL), return;);
+  dhcp = netif->dhcp;
+  LWIP_ERROR("dhcp_bind: dhcp != NULL", (dhcp != NULL), return;);
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_bind(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num));
+
+  /* temporary DHCP lease? */
+  if (dhcp->offered_t1_renew != 0xffffffffUL) {
+    /* set renewal period timer */
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(): t1 renewal timer %"U32_F" secs\n", dhcp->offered_t1_renew));
+    timeout = (dhcp->offered_t1_renew + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS;
+    if(timeout > 0xffff) {
+      timeout = 0xffff;
+    }
+    dhcp->t1_timeout = (u16_t)timeout;
+    if (dhcp->t1_timeout == 0) {
+      dhcp->t1_timeout = 1;
+    }
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_bind(): set request timeout %"U32_F" msecs\n", dhcp->offered_t1_renew*1000));
+  }
+  /* set renewal period timer */
+  if (dhcp->offered_t2_rebind != 0xffffffffUL) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_bind(): t2 rebind timer %"U32_F" secs\n", dhcp->offered_t2_rebind));
+    timeout = (dhcp->offered_t2_rebind + DHCP_COARSE_TIMER_SECS / 2) / DHCP_COARSE_TIMER_SECS;
+    if(timeout > 0xffff) {
+      timeout = 0xffff;
+    }
+    dhcp->t2_timeout = (u16_t)timeout;
+    if (dhcp->t2_timeout == 0) {
+      dhcp->t2_timeout = 1;
+    }
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_bind(): set request timeout %"U32_F" msecs\n", dhcp->offered_t2_rebind*1000));
+  }
+  /* copy offered network mask */
+  ip_addr_set(&sn_mask, &dhcp->offered_sn_mask);
+
+  /* subnet mask not given? */
+  /* TODO: this is not a valid check. what if the network mask is 0? */
+  if (sn_mask.addr == 0) {
+    /* choose a safe subnet mask given the network class */
+    u8_t first_octet = ip4_addr1(&sn_mask);
+    if (first_octet <= 127) {
+      sn_mask.addr = htonl(0xff000000);
+    } else if (first_octet >= 192) {
+      sn_mask.addr = htonl(0xffffff00);
+    } else {
+      sn_mask.addr = htonl(0xffff0000);
+    }
+  }
+
+  ip_addr_set(&gw_addr, &dhcp->offered_gw_addr);
+  /* gateway address not given? */
+  if (gw_addr.addr == 0) {
+    /* copy network address */
+    gw_addr.addr = (dhcp->offered_ip_addr.addr & sn_mask.addr);
+    /* use first host address on network as gateway */
+    gw_addr.addr |= htonl(0x00000001);
+  }
+
+#if LWIP_DHCP_AUTOIP_COOP
+  if(dhcp->autoip_coop_state == DHCP_AUTOIP_COOP_STATE_ON) {
+    autoip_stop(netif);
+    dhcp->autoip_coop_state = DHCP_AUTOIP_COOP_STATE_OFF;
+  }
+#endif /* LWIP_DHCP_AUTOIP_COOP */
+
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_bind(): IP: 0x%08"X32_F"\n", dhcp->offered_ip_addr.addr));
+  netif_set_ipaddr(netif, &dhcp->offered_ip_addr);
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_bind(): SN: 0x%08"X32_F"\n", sn_mask.addr));
+  netif_set_netmask(netif, &sn_mask);
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_STATE, ("dhcp_bind(): GW: 0x%08"X32_F"\n", gw_addr.addr));
+  netif_set_gw(netif, &gw_addr);
+  /* bring the interface up */
+  netif_set_up(netif);
+  /* netif is now bound to DHCP leased address */
+  dhcp_set_state(dhcp, DHCP_BOUND);
+}
+
+/**
+ * Renew an existing DHCP lease at the involved DHCP server.
+ *
+ * @param netif network interface which must renew its lease
+ */
+err_t
+dhcp_renew(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  err_t result;
+  u16_t msecs;
+#if LWIP_NETIF_HOSTNAME
+  const char *p;
+#endif /* LWIP_NETIF_HOSTNAME */
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_renew()\n"));
+  dhcp_set_state(dhcp, DHCP_RENEWING);
+
+  /* create and initialize the DHCP message header */
+  result = dhcp_create_request(netif);
+  if (result == ERR_OK) {
+
+    dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+    dhcp_option_byte(dhcp, DHCP_REQUEST);
+
+    dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+    dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+#if LWIP_NETIF_HOSTNAME
+    p = (const char*)netif->hostname;
+    if (p != NULL) {
+      dhcp_option(dhcp, DHCP_OPTION_HOSTNAME, strlen(p));
+      while (*p) {
+        dhcp_option_byte(dhcp, *p++);
+      }
+    }
+#endif /* LWIP_NETIF_HOSTNAME */
+
+#if 0
+    dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+    dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr));
+#endif
+
+#if 0
+    dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4);
+    dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr));
+#endif
+    /* append DHCP message trailer */
+    dhcp_option_trailer(dhcp);
+
+    pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+    udp_connect(dhcp->pcb, &dhcp->server_ip_addr, DHCP_SERVER_PORT);
+    udp_sendto_if(dhcp->pcb, dhcp->p_out, &dhcp->server_ip_addr, DHCP_SERVER_PORT, netif);
+    dhcp_delete_request(netif);
+
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_renew: RENEWING\n"));
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_renew: could not allocate DHCP request\n"));
+  }
+  dhcp->tries++;
+  /* back-off on retries, but to a maximum of 20 seconds */
+  msecs = dhcp->tries < 10 ? dhcp->tries * 2000 : 20 * 1000;
+  dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_renew(): set request timeout %"U16_F" msecs\n", msecs));
+  return result;
+}
+
+/**
+ * Rebind with a DHCP server for an existing DHCP lease.
+ *
+ * @param netif network interface which must rebind with a DHCP server
+ */
+static err_t
+dhcp_rebind(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  err_t result;
+  u16_t msecs;
+#if LWIP_NETIF_HOSTNAME
+  const char *p;
+#endif /* LWIP_NETIF_HOSTNAME */
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind()\n"));
+  dhcp_set_state(dhcp, DHCP_REBINDING);
+
+  /* create and initialize the DHCP message header */
+  result = dhcp_create_request(netif);
+  if (result == ERR_OK) {
+
+    dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+    dhcp_option_byte(dhcp, DHCP_REQUEST);
+
+    dhcp_option(dhcp, DHCP_OPTION_MAX_MSG_SIZE, DHCP_OPTION_MAX_MSG_SIZE_LEN);
+    dhcp_option_short(dhcp, DHCP_MAX_MSG_LEN(netif));
+
+#if LWIP_NETIF_HOSTNAME
+    p = (const char*)netif->hostname;
+    if (p != NULL) {
+      dhcp_option(dhcp, DHCP_OPTION_HOSTNAME, strlen(p));
+      while (*p) {
+        dhcp_option_byte(dhcp, *p++);
+      }
+    }
+#endif /* LWIP_NETIF_HOSTNAME */
+
+#if 0
+    dhcp_option(dhcp, DHCP_OPTION_REQUESTED_IP, 4);
+    dhcp_option_long(dhcp, ntohl(dhcp->offered_ip_addr.addr));
+
+    dhcp_option(dhcp, DHCP_OPTION_SERVER_ID, 4);
+    dhcp_option_long(dhcp, ntohl(dhcp->server_ip_addr.addr));
+#endif
+
+    dhcp_option_trailer(dhcp);
+
+    pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+    /* broadcast to server */
+    udp_connect(dhcp->pcb, IP_ADDR_ANY, DHCP_SERVER_PORT);
+    udp_sendto_if(dhcp->pcb, dhcp->p_out, IP_ADDR_BROADCAST, DHCP_SERVER_PORT, netif);
+    dhcp_delete_request(netif);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind: REBINDING\n"));
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_rebind: could not allocate DHCP request\n"));
+  }
+  dhcp->tries++;
+  msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000;
+  dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_rebind(): set request timeout %"U16_F" msecs\n", msecs));
+  return result;
+}
+
+/**
+ * Release a DHCP lease.
+ *
+ * @param netif network interface which must release its lease
+ */
+err_t
+dhcp_release(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  err_t result;
+  u16_t msecs;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_release()\n"));
+
+  /* idle DHCP client */
+  dhcp_set_state(dhcp, DHCP_OFF);
+  /* clean old DHCP offer */
+  dhcp->server_ip_addr.addr = 0;
+  dhcp->offered_ip_addr.addr = dhcp->offered_sn_mask.addr = 0;
+  dhcp->offered_gw_addr.addr = dhcp->offered_bc_addr.addr = 0;
+  dhcp->offered_t0_lease = dhcp->offered_t1_renew = dhcp->offered_t2_rebind = 0;
+  dhcp->dns_count = 0;
+  
+  /* create and initialize the DHCP message header */
+  result = dhcp_create_request(netif);
+  if (result == ERR_OK) {
+    dhcp_option(dhcp, DHCP_OPTION_MESSAGE_TYPE, DHCP_OPTION_MESSAGE_TYPE_LEN);
+    dhcp_option_byte(dhcp, DHCP_RELEASE);
+
+    dhcp_option_trailer(dhcp);
+
+    pbuf_realloc(dhcp->p_out, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN + dhcp->options_out_len);
+
+    udp_connect(dhcp->pcb, &dhcp->server_ip_addr, DHCP_SERVER_PORT);
+    udp_sendto_if(dhcp->pcb, dhcp->p_out, &dhcp->server_ip_addr, DHCP_SERVER_PORT, netif);
+    dhcp_delete_request(netif);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_release: RELEASED, DHCP_OFF\n"));
+  } else {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_release: could not allocate DHCP request\n"));
+  }
+  dhcp->tries++;
+  msecs = dhcp->tries < 10 ? dhcp->tries * 1000 : 10 * 1000;
+  dhcp->request_timeout = (msecs + DHCP_FINE_TIMER_MSECS - 1) / DHCP_FINE_TIMER_MSECS;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("dhcp_release(): set request timeout %"U16_F" msecs\n", msecs));
+  /* bring the interface down */
+  netif_set_down(netif);
+  /* remove IP address from interface */
+  netif_set_ipaddr(netif, IP_ADDR_ANY);
+  netif_set_gw(netif, IP_ADDR_ANY);
+  netif_set_netmask(netif, IP_ADDR_ANY);
+  
+  /* TODO: netif_down(netif); */
+  return result;
+}
+
+/**
+ * Remove the DHCP client from the interface.
+ *
+ * @param netif The network interface to stop DHCP on
+ */
+void
+dhcp_stop(struct netif *netif)
+{
+  struct dhcp *dhcp = netif->dhcp;
+  LWIP_ERROR("dhcp_stop: netif != NULL", (netif != NULL), return;);
+  /* Remove the flag that says this netif is handled by DHCP. */
+  netif->flags &= ~NETIF_FLAG_DHCP;
+
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_stop()\n"));
+  /* netif is DHCP configured? */
+  if (dhcp != NULL) {
+#if LWIP_DHCP_AUTOIP_COOP
+  if(dhcp->autoip_coop_state == DHCP_AUTOIP_COOP_STATE_ON) {
+    autoip_stop(netif);
+    dhcp->autoip_coop_state = DHCP_AUTOIP_COOP_STATE_OFF;
+  }
+#endif /* LWIP_DHCP_AUTOIP_COOP */
+
+    if (dhcp->pcb != NULL) {
+      udp_remove(dhcp->pcb);
+      dhcp->pcb = NULL;
+    }
+    if (dhcp->p != NULL) {
+      pbuf_free(dhcp->p);
+      dhcp->p = NULL;
+    }
+    /* free unfolded reply */
+    dhcp_free_reply(dhcp);
+    mem_free((void *)dhcp);
+    netif->dhcp = NULL;
+  }
+}
+
+/*
+ * Set the DHCP state of a DHCP client.
+ *
+ * If the state changed, reset the number of tries.
+ *
+ * TODO: we might also want to reset the timeout here?
+ */
+static void
+dhcp_set_state(struct dhcp *dhcp, u8_t new_state)
+{
+  if (new_state != dhcp->state) {
+    dhcp->state = new_state;
+    dhcp->tries = 0;
+  }
+}
+
+/*
+ * Concatenate an option type and length field to the outgoing
+ * DHCP message.
+ *
+ */
+static void
+dhcp_option(struct dhcp *dhcp, u8_t option_type, u8_t option_len)
+{
+  LWIP_ASSERT("dhcp_option: dhcp->options_out_len + 2 + option_len <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 2U + option_len <= DHCP_OPTIONS_LEN);
+  dhcp->msg_out->options[dhcp->options_out_len++] = option_type;
+  dhcp->msg_out->options[dhcp->options_out_len++] = option_len;
+}
+/*
+ * Concatenate a single byte to the outgoing DHCP message.
+ *
+ */
+static void
+dhcp_option_byte(struct dhcp *dhcp, u8_t value)
+{
+  LWIP_ASSERT("dhcp_option_byte: dhcp->options_out_len < DHCP_OPTIONS_LEN", dhcp->options_out_len < DHCP_OPTIONS_LEN);
+  dhcp->msg_out->options[dhcp->options_out_len++] = value;
+}
+
+static void
+dhcp_option_short(struct dhcp *dhcp, u16_t value)
+{
+  LWIP_ASSERT("dhcp_option_short: dhcp->options_out_len + 2 <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 2U <= DHCP_OPTIONS_LEN);
+  dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0xff00U) >> 8);
+  dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t) (value & 0x00ffU);
+}
+
+static void
+dhcp_option_long(struct dhcp *dhcp, u32_t value)
+{
+  LWIP_ASSERT("dhcp_option_long: dhcp->options_out_len + 4 <= DHCP_OPTIONS_LEN", dhcp->options_out_len + 4U <= DHCP_OPTIONS_LEN);
+  dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0xff000000UL) >> 24);
+  dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0x00ff0000UL) >> 16);
+  dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0x0000ff00UL) >> 8);
+  dhcp->msg_out->options[dhcp->options_out_len++] = (u8_t)((value & 0x000000ffUL));
+}
+
+/**
+ * Extract the DHCP message and the DHCP options.
+ *
+ * Extract the DHCP message and the DHCP options, each into a contiguous
+ * piece of memory. As a DHCP message is variable sized by its options,
+ * and also allows overriding some fields for options, the easy approach
+ * is to first unfold the options into a conitguous piece of memory, and
+ * use that further on.
+ *
+ */
+static err_t
+dhcp_unfold_reply(struct dhcp *dhcp)
+{
+  u16_t ret;
+  LWIP_ERROR("dhcp != NULL", (dhcp != NULL), return ERR_ARG;);
+  LWIP_ERROR("dhcp->p != NULL", (dhcp->p != NULL), return ERR_VAL;);
+  /* free any left-overs from previous unfolds */
+  dhcp_free_reply(dhcp);
+  /* options present? */
+  if (dhcp->p->tot_len > (sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN)) {
+    dhcp->options_in_len = dhcp->p->tot_len - (sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN);
+    dhcp->options_in = mem_malloc(dhcp->options_in_len);
+    if (dhcp->options_in == NULL) {
+      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_unfold_reply(): could not allocate dhcp->options\n"));
+      return ERR_MEM;
+    }
+  }
+  dhcp->msg_in = mem_malloc(sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN);
+  if (dhcp->msg_in == NULL) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_unfold_reply(): could not allocate dhcp->msg_in\n"));
+    mem_free((void *)dhcp->options_in);
+    dhcp->options_in = NULL;
+    return ERR_MEM;
+  }
+
+  /** copy the DHCP message without options */
+  ret = pbuf_copy_partial(dhcp->p, dhcp->msg_in, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN, 0);
+  LWIP_ASSERT("ret == sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN", ret == sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN);
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_unfold_reply(): copied %"U16_F" bytes into dhcp->msg_in[]\n",
+     sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN));
+
+  if (dhcp->options_in != NULL) {
+    /** copy the DHCP options */
+    ret = pbuf_copy_partial(dhcp->p, dhcp->options_in, dhcp->options_in_len, sizeof(struct dhcp_msg) - DHCP_OPTIONS_LEN);
+    LWIP_ASSERT("ret == dhcp->options_in_len", ret == dhcp->options_in_len);
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_unfold_reply(): copied %"U16_F" bytes to dhcp->options_in[]\n",
+      dhcp->options_in_len));
+  }
+  LWIP_UNUSED_ARG(ret);
+  return ERR_OK;
+}
+
+/**
+ * Free the incoming DHCP message including contiguous copy of
+ * its DHCP options.
+ *
+ */
+static void dhcp_free_reply(struct dhcp *dhcp)
+{
+  if (dhcp->msg_in != NULL) {
+    mem_free((void *)dhcp->msg_in);
+    dhcp->msg_in = NULL;
+  }
+  if (dhcp->options_in) {
+    mem_free((void *)dhcp->options_in);
+    dhcp->options_in = NULL;
+    dhcp->options_in_len = 0;
+  }
+  LWIP_DEBUGF(DHCP_DEBUG, ("dhcp_free_reply(): free'd\n"));
+}
+
+
+/**
+ * If an incoming DHCP message is in response to us, then trigger the state machine
+ */
+static void dhcp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port)
+{
+  struct netif *netif = (struct netif *)arg;
+  struct dhcp *dhcp = netif->dhcp;
+  struct dhcp_msg *reply_msg = (struct dhcp_msg *)p->payload;
+  u8_t *options_ptr;
+  u8_t msg_type;
+  u8_t i;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_recv(pbuf = %p) from DHCP server %"U16_F".%"U16_F".%"U16_F".%"U16_F" port %"U16_F"\n", (void*)p,
+    (u16_t)(ntohl(addr->addr) >> 24 & 0xff), (u16_t)(ntohl(addr->addr) >> 16 & 0xff),
+    (u16_t)(ntohl(addr->addr) >>  8 & 0xff), (u16_t)(ntohl(addr->addr) & 0xff), port));
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("pbuf->len = %"U16_F"\n", p->len));
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("pbuf->tot_len = %"U16_F"\n", p->tot_len));
+  /* prevent warnings about unused arguments */
+  LWIP_UNUSED_ARG(pcb);
+  LWIP_UNUSED_ARG(addr);
+  LWIP_UNUSED_ARG(port);
+  dhcp->p = p;
+  /* TODO: check packet length before reading them */
+  if (reply_msg->op != DHCP_BOOTREPLY) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("not a DHCP reply message, but type %"U16_F"\n", (u16_t)reply_msg->op));
+    goto free_pbuf_and_return;
+  }
+  /* iterate through hardware address and match against DHCP message */
+  for (i = 0; i < netif->hwaddr_len; i++) {
+    if (netif->hwaddr[i] != reply_msg->chaddr[i]) {
+      LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("netif->hwaddr[%"U16_F"]==%02"X16_F" != reply_msg->chaddr[%"U16_F"]==%02"X16_F"\n",
+        (u16_t)i, (u16_t)netif->hwaddr[i], (u16_t)i, (u16_t)reply_msg->chaddr[i]));
+      goto free_pbuf_and_return;
+    }
+  }
+  /* match transaction ID against what we expected */
+  if (ntohl(reply_msg->xid) != dhcp->xid) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("transaction id mismatch reply_msg->xid(%"X32_F")!=dhcp->xid(%"X32_F")\n",ntohl(reply_msg->xid),dhcp->xid));
+    goto free_pbuf_and_return;
+  }
+  /* option fields could be unfold? */
+  if (dhcp_unfold_reply(dhcp) != ERR_OK) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("problem unfolding DHCP message - too short on memory?\n"));
+    goto free_pbuf_and_return;
+  }
+
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("searching DHCP_OPTION_MESSAGE_TYPE\n"));
+  /* obtain pointer to DHCP message type */
+  options_ptr = dhcp_get_option_ptr(dhcp, DHCP_OPTION_MESSAGE_TYPE);
+  if (options_ptr == NULL) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("DHCP_OPTION_MESSAGE_TYPE option not found\n"));
+    goto free_pbuf_and_return;
+  }
+
+  /* read DHCP message type */
+  msg_type = dhcp_get_option_byte(options_ptr + 2);
+  /* message type is DHCP ACK? */
+  if (msg_type == DHCP_ACK) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("DHCP_ACK received\n"));
+    /* in requesting state? */
+    if (dhcp->state == DHCP_REQUESTING) {
+      dhcp_handle_ack(netif);
+      dhcp->request_timeout = 0;
+#if DHCP_DOES_ARP_CHECK
+      /* check if the acknowledged lease address is already in use */
+      dhcp_check(netif);
+#else
+      /* bind interface to the acknowledged lease address */
+      dhcp_bind(netif);
+#endif
+    }
+    /* already bound to the given lease address? */
+    else if ((dhcp->state == DHCP_REBOOTING) || (dhcp->state == DHCP_REBINDING) || (dhcp->state == DHCP_RENEWING)) {
+      dhcp->request_timeout = 0;
+      dhcp_bind(netif);
+    }
+  }
+  /* received a DHCP_NAK in appropriate state? */
+  else if ((msg_type == DHCP_NAK) &&
+    ((dhcp->state == DHCP_REBOOTING) || (dhcp->state == DHCP_REQUESTING) ||
+     (dhcp->state == DHCP_REBINDING) || (dhcp->state == DHCP_RENEWING  ))) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("DHCP_NAK received\n"));
+    dhcp->request_timeout = 0;
+    dhcp_handle_nak(netif);
+  }
+  /* received a DHCP_OFFER in DHCP_SELECTING state? */
+  else if ((msg_type == DHCP_OFFER) && (dhcp->state == DHCP_SELECTING)) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("DHCP_OFFER received in DHCP_SELECTING state\n"));
+    dhcp->request_timeout = 0;
+    /* remember offered lease */
+    dhcp_handle_offer(netif);
+  }
+free_pbuf_and_return:
+  dhcp_free_reply(dhcp);
+  pbuf_free(p);
+  dhcp->p = NULL;
+}
+
+/**
+ * Create a DHCP request, fill in common headers
+ *
+ * @param netif the netif under DHCP control
+ */
+static err_t
+dhcp_create_request(struct netif *netif)
+{
+  struct dhcp *dhcp;
+  u16_t i;
+#ifndef DHCP_GLOBAL_XID
+  /** default global transaction identifier starting value (easy to match
+   *  with a packet analyser). We simply increment for each new request.
+   *  Predefine DHCP_GLOBAL_XID to a better value or a function call to generate one
+   *  at runtime, any supporting function prototypes can be defined in DHCP_GLOBAL_XID_HEADER */
+  static u32_t xid = 0xABCD0000;
+#else
+  static u32_t xid;
+  static u8_t xid_initialised = 0;
+  if (!xid_initialised) {
+    xid = DHCP_GLOBAL_XID;
+    xid_initialised = !xid_initialised;
+  }
+#endif
+  LWIP_ERROR("dhcp_create_request: netif != NULL", (netif != NULL), return ERR_ARG;);
+  dhcp = netif->dhcp;
+  LWIP_ERROR("dhcp_create_request: dhcp != NULL", (dhcp != NULL), return ERR_VAL;);
+  LWIP_ASSERT("dhcp_create_request: dhcp->p_out == NULL", dhcp->p_out == NULL);
+  LWIP_ASSERT("dhcp_create_request: dhcp->msg_out == NULL", dhcp->msg_out == NULL);
+  dhcp->p_out = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcp_msg), PBUF_RAM);
+  if (dhcp->p_out == NULL) {
+    LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("dhcp_create_request(): could not allocate pbuf\n"));
+    return ERR_MEM;
+  }
+  LWIP_ASSERT("dhcp_create_request: check that first pbuf can hold struct dhcp_msg",
+           (dhcp->p_out->len >= sizeof(struct dhcp_msg)));
+
+  /* reuse transaction identifier in retransmissions */
+  if (dhcp->tries==0)
+      xid++;
+  dhcp->xid = xid;
+  LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2,
+              ("transaction id xid(%"X32_F")\n", xid));
+
+  dhcp->msg_out = (struct dhcp_msg *)dhcp->p_out->payload;
+
+  dhcp->msg_out->op = DHCP_BOOTREQUEST;
+  /* TODO: make link layer independent */
+  dhcp->msg_out->htype = DHCP_HTYPE_ETH;
+  /* TODO: make link layer independent */
+  dhcp->msg_out->hlen = DHCP_HLEN_ETH;
+  dhcp->msg_out->hops = 0;
+  dhcp->msg_out->xid = htonl(dhcp->xid);
+  dhcp->msg_out->secs = 0;
+  dhcp->msg_out->flags = 0;
+  dhcp->msg_out->ciaddr.addr = 0;
+  if (dhcp->state==DHCP_BOUND || dhcp->state==DHCP_RENEWING || dhcp->state==DHCP_REBINDING) {
+    dhcp->msg_out->ciaddr.addr = netif->ip_addr.addr;
+  }
+  dhcp->msg_out->yiaddr.addr = 0;
+  dhcp->msg_out->siaddr.addr = 0;
+  dhcp->msg_out->giaddr.addr = 0;
+  for (i = 0; i < DHCP_CHADDR_LEN; i++) {
+    /* copy netif hardware address, pad with zeroes */
+    dhcp->msg_out->chaddr[i] = (i < netif->hwaddr_len) ? netif->hwaddr[i] : 0/* pad byte*/;
+  }
+  for (i = 0; i < DHCP_SNAME_LEN; i++) {
+    dhcp->msg_out->sname[i] = 0;
+  }
+  for (i = 0; i < DHCP_FILE_LEN; i++) {
+    dhcp->msg_out->file[i] = 0;
+  }
+  dhcp->msg_out->cookie = htonl(0x63825363UL);
+  dhcp->options_out_len = 0;
+  /* fill options field with an incrementing array (for debugging purposes) */
+  for (i = 0; i < DHCP_OPTIONS_LEN; i++) {
+    dhcp->msg_out->options[i] = (u8_t)i; /* for debugging only, no matter if truncated */
+  }
+  return ERR_OK;
+}
+
+/**
+ * Free previously allocated memory used to send a DHCP request.
+ *
+ * @param netif the netif under DHCP control
+ */
+static void
+dhcp_delete_request(struct netif *netif)
+{
+  struct dhcp *dhcp;
+  LWIP_ERROR("dhcp_delete_request: netif != NULL", (netif != NULL), return;);
+  dhcp = netif->dhcp;
+  LWIP_ERROR("dhcp_delete_request: dhcp != NULL", (dhcp != NULL), return;);
+  LWIP_ASSERT("dhcp_delete_request: dhcp->p_out != NULL", dhcp->p_out != NULL);
+  LWIP_ASSERT("dhcp_delete_request: dhcp->msg_out != NULL", dhcp->msg_out != NULL);
+  if (dhcp->p_out != NULL) {
+    pbuf_free(dhcp->p_out);
+  }
+  dhcp->p_out = NULL;
+  dhcp->msg_out = NULL;
+}
+
+/**
+ * Add a DHCP message trailer
+ *
+ * Adds the END option to the DHCP message, and if
+ * necessary, up to three padding bytes.
+ *
+ * @param dhcp DHCP state structure
+ */
+static void
+dhcp_option_trailer(struct dhcp *dhcp)
+{
+  LWIP_ERROR("dhcp_option_trailer: dhcp != NULL", (dhcp != NULL), return;);
+  LWIP_ASSERT("dhcp_option_trailer: dhcp->msg_out != NULL\n", dhcp->msg_out != NULL);
+  LWIP_ASSERT("dhcp_option_trailer: dhcp->options_out_len < DHCP_OPTIONS_LEN\n", dhcp->options_out_len < DHCP_OPTIONS_LEN);
+  dhcp->msg_out->options[dhcp->options_out_len++] = DHCP_OPTION_END;
+  /* packet is too small, or not 4 byte aligned? */
+  while ((dhcp->options_out_len < DHCP_MIN_OPTIONS_LEN) || (dhcp->options_out_len & 3)) {
+    /* LWIP_DEBUGF(DHCP_DEBUG,("dhcp_option_trailer:dhcp->options_out_len=%"U16_F", DHCP_OPTIONS_LEN=%"U16_F, dhcp->options_out_len, DHCP_OPTIONS_LEN)); */
+    LWIP_ASSERT("dhcp_option_trailer: dhcp->options_out_len < DHCP_OPTIONS_LEN\n", dhcp->options_out_len < DHCP_OPTIONS_LEN);
+    /* add a fill/padding byte */
+    dhcp->msg_out->options[dhcp->options_out_len++] = 0;
+  }
+}
+
+/**
+ * Find the offset of a DHCP option inside the DHCP message.
+ *
+ * @param dhcp DHCP client
+ * @param option_type
+ *
+ * @return a byte offset into the UDP message where the option was found, or
+ * zero if the given option was not found.
+ */
+static u8_t *dhcp_get_option_ptr(struct dhcp *dhcp, u8_t option_type)
+{
+  u8_t overload = DHCP_OVERLOAD_NONE;
+
+  /* options available? */
+  if ((dhcp->options_in != NULL) && (dhcp->options_in_len > 0)) {
+    /* start with options field */
+    u8_t *options = (u8_t *)dhcp->options_in;
+    u16_t offset = 0;
+    /* at least 1 byte to read and no end marker, then at least 3 bytes to read? */
+    while ((offset < dhcp->options_in_len) && (options[offset] != DHCP_OPTION_END)) {
+      /* LWIP_DEBUGF(DHCP_DEBUG, ("msg_offset=%"U16_F", q->len=%"U16_F, msg_offset, q->len)); */
+      /* are the sname and/or file field overloaded with options? */
+      if (options[offset] == DHCP_OPTION_OVERLOAD) {
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 2, ("overloaded message detected\n"));
+        /* skip option type and length */
+        offset += 2;
+        overload = options[offset++];
+      }
+      /* requested option found */
+      else if (options[offset] == option_type) {
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("option found at offset %"U16_F" in options\n", offset));
+        return &options[offset];
+      /* skip option */
+      } else {
+         LWIP_DEBUGF(DHCP_DEBUG, ("skipping option %"U16_F" in options\n", options[offset]));
+        /* skip option type */
+        offset++;
+        /* skip option length, and then length bytes */
+        offset += 1 + options[offset];
+      }
+    }
+    /* is this an overloaded message? */
+    if (overload != DHCP_OVERLOAD_NONE) {
+      u16_t field_len;
+      if (overload == DHCP_OVERLOAD_FILE) {
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("overloaded file field\n"));
+        options = (u8_t *)&dhcp->msg_in->file;
+        field_len = DHCP_FILE_LEN;
+      } else if (overload == DHCP_OVERLOAD_SNAME) {
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("overloaded sname field\n"));
+        options = (u8_t *)&dhcp->msg_in->sname;
+        field_len = DHCP_SNAME_LEN;
+      /* TODO: check if else if () is necessary */
+      } else {
+        LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 1, ("overloaded sname and file field\n"));
+        options = (u8_t *)&dhcp->msg_in->sname;
+        field_len = DHCP_FILE_LEN + DHCP_SNAME_LEN;
+      }
+      offset = 0;
+
+      /* at least 1 byte to read and no end marker */
+      while ((offset < field_len) && (options[offset] != DHCP_OPTION_END)) {
+        if (options[offset] == option_type) {
+           LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("option found at offset=%"U16_F"\n", offset));
+          return &options[offset];
+        /* skip option */
+        } else {
+          LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("skipping option %"U16_F"\n", options[offset]));
+          /* skip option type */
+          offset++;
+          offset += 1 + options[offset];
+        }
+      }
+    }
+  }
+  return NULL;
+}
+
+/**
+ * Return the byte of DHCP option data.
+ *
+ * @param client DHCP client.
+ * @param ptr pointer obtained by dhcp_get_option_ptr().
+ *
+ * @return byte value at the given address.
+ */
+static u8_t
+dhcp_get_option_byte(u8_t *ptr)
+{
+  LWIP_DEBUGF(DHCP_DEBUG, ("option byte value=%"U16_F"\n", (u16_t)(*ptr)));
+  return *ptr;
+}
+
+#if 0 /* currently unused */
+/**
+ * Return the 16-bit value of DHCP option data.
+ *
+ * @param client DHCP client.
+ * @param ptr pointer obtained by dhcp_get_option_ptr().
+ *
+ * @return byte value at the given address.
+ */
+static u16_t
+dhcp_get_option_short(u8_t *ptr)
+{
+  u16_t value;
+  value = *ptr++ << 8;
+  value |= *ptr;
+  LWIP_DEBUGF(DHCP_DEBUG, ("option short value=%"U16_F"\n", value));
+  return value;
+}
+#endif
+
+/**
+ * Return the 32-bit value of DHCP option data.
+ *
+ * @param client DHCP client.
+ * @param ptr pointer obtained by dhcp_get_option_ptr().
+ *
+ * @return byte value at the given address.
+ */
+static u32_t dhcp_get_option_long(u8_t *ptr)
+{
+  u32_t value;
+  value = (u32_t)(*ptr++) << 24;
+  value |= (u32_t)(*ptr++) << 16;
+  value |= (u32_t)(*ptr++) << 8;
+  value |= (u32_t)(*ptr++);
+  LWIP_DEBUGF(DHCP_DEBUG, ("option long value=%"U32_F"\n", value));
+  return value;
+}
+
+#endif /* LWIP_DHCP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/dns.c b/firmware/x300/lwip/lwip-1.3.1/src/core/dns.c
new file mode 100644
index 000000000..62a2592e9
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/dns.c
@@ -0,0 +1,980 @@
+/**
+ * @file
+ * DNS - host name to IP address resolver.
+ *
+ */
+
+/**
+
+ * This file implements a DNS host name to IP address resolver.
+
+ * Port to lwIP from uIP
+ * by Jim Pettinato April 2007
+
+ * uIP version Copyright (c) 2002-2003, Adam Dunkels.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * DNS.C
+ *
+ * The lwIP DNS resolver functions are used to lookup a host name and
+ * map it to a numerical IP address. It maintains a list of resolved
+ * hostnames that can be queried with the dns_lookup() function.
+ * New hostnames can be resolved using the dns_query() function.
+ *
+ * The lwIP version of the resolver also adds a non-blocking version of
+ * gethostbyname() that will work with a raw API application. This function
+ * checks for an IP address string first and converts it if it is valid.
+ * gethostbyname() then does a dns_lookup() to see if the name is 
+ * already in the table. If so, the IP is returned. If not, a query is 
+ * issued and the function returns with a ERR_INPROGRESS status. The app
+ * using the dns client must then go into a waiting state.
+ *
+ * Once a hostname has been resolved (or found to be non-existent),
+ * the resolver code calls a specified callback function (which 
+ * must be implemented by the module that uses the resolver).
+ */
+
+/*-----------------------------------------------------------------------------
+ * RFC 1035 - Domain names - implementation and specification
+ * RFC 2181 - Clarifications to the DNS Specification
+ *----------------------------------------------------------------------------*/
+
+/** @todo: define good default values (rfc compliance) */
+/** @todo: improve answer parsing, more checkings... */
+/** @todo: check RFC1035 - 7.3. Processing responses */
+
+/*-----------------------------------------------------------------------------
+ * Includes
+ *----------------------------------------------------------------------------*/
+
+#include "lwip/opt.h"
+
+#if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/udp.h"
+#include "lwip/mem.h"
+#include "lwip/dns.h"
+
+#include <string.h>
+
+/** DNS server IP address */
+#ifndef DNS_SERVER_ADDRESS
+#define DNS_SERVER_ADDRESS        inet_addr("208.67.222.222") /* resolver1.opendns.com */
+#endif
+
+/** DNS server port address */
+#ifndef DNS_SERVER_PORT
+#define DNS_SERVER_PORT           53
+#endif
+
+/** DNS maximum number of retries when asking for a name, before "timeout". */
+#ifndef DNS_MAX_RETRIES
+#define DNS_MAX_RETRIES           4
+#endif
+
+/** DNS resource record max. TTL (one week as default) */
+#ifndef DNS_MAX_TTL
+#define DNS_MAX_TTL               604800
+#endif
+
+/* DNS protocol flags */
+#define DNS_FLAG1_RESPONSE        0x80
+#define DNS_FLAG1_OPCODE_STATUS   0x10
+#define DNS_FLAG1_OPCODE_INVERSE  0x08
+#define DNS_FLAG1_OPCODE_STANDARD 0x00
+#define DNS_FLAG1_AUTHORATIVE     0x04
+#define DNS_FLAG1_TRUNC           0x02
+#define DNS_FLAG1_RD              0x01
+#define DNS_FLAG2_RA              0x80
+#define DNS_FLAG2_ERR_MASK        0x0f
+#define DNS_FLAG2_ERR_NONE        0x00
+#define DNS_FLAG2_ERR_NAME        0x03
+
+/* DNS protocol states */
+#define DNS_STATE_UNUSED          0
+#define DNS_STATE_NEW             1
+#define DNS_STATE_ASKING          2
+#define DNS_STATE_DONE            3
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** DNS message header */
+struct dns_hdr {
+  PACK_STRUCT_FIELD(u16_t id);
+  PACK_STRUCT_FIELD(u8_t flags1);
+  PACK_STRUCT_FIELD(u8_t flags2);
+  PACK_STRUCT_FIELD(u16_t numquestions);
+  PACK_STRUCT_FIELD(u16_t numanswers);
+  PACK_STRUCT_FIELD(u16_t numauthrr);
+  PACK_STRUCT_FIELD(u16_t numextrarr);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+#define SIZEOF_DNS_HDR 12
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** DNS query message structure */
+struct dns_query {
+  /* DNS query record starts with either a domain name or a pointer
+     to a name already present somewhere in the packet. */
+  PACK_STRUCT_FIELD(u16_t type);
+  PACK_STRUCT_FIELD(u16_t class);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+#define SIZEOF_DNS_QUERY 4
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** DNS answer message structure */
+struct dns_answer {
+  /* DNS answer record starts with either a domain name or a pointer
+     to a name already present somewhere in the packet. */
+  PACK_STRUCT_FIELD(u16_t type);
+  PACK_STRUCT_FIELD(u16_t class);
+  PACK_STRUCT_FIELD(u32_t ttl);
+  PACK_STRUCT_FIELD(u16_t len);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+#define SIZEOF_DNS_ANSWER 10
+
+/** DNS table entry */
+struct dns_table_entry {
+  u8_t  state;
+  u8_t  numdns;
+  u8_t  tmr;
+  u8_t  retries;
+  u8_t  seqno;
+  u8_t  err;
+  u32_t ttl;
+  char name[DNS_MAX_NAME_LENGTH];
+  struct ip_addr ipaddr;
+  /* pointer to callback on DNS query done */
+  dns_found_callback found;
+  void *arg;
+};
+
+#if DNS_LOCAL_HOSTLIST
+/** struct used for local host-list */
+struct local_hostlist_entry {
+  /** static hostname */
+  const char *name;
+  /** static host address in network byteorder */
+  u32_t addr;
+  struct local_hostlist_entry *next;
+};
+
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+/** Local host-list. For hostnames in this list, no
+ *  external name resolution is performed */
+static struct local_hostlist_entry *local_hostlist_dynamic;
+#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+
+/** Defining this allows the local_hostlist_static to be placed in a different
+ * linker section (e.g. FLASH) */
+#ifndef DNS_LOCAL_HOSTLIST_STORAGE_PRE
+#define DNS_LOCAL_HOSTLIST_STORAGE_PRE static
+#endif /* DNS_LOCAL_HOSTLIST_STORAGE_PRE */
+/** Defining this allows the local_hostlist_static to be placed in a different
+ * linker section (e.g. FLASH) */
+#ifndef DNS_LOCAL_HOSTLIST_STORAGE_POST
+#define DNS_LOCAL_HOSTLIST_STORAGE_POST
+#endif /* DNS_LOCAL_HOSTLIST_STORAGE_POST */
+DNS_LOCAL_HOSTLIST_STORAGE_PRE struct local_hostlist_entry local_hostlist_static[]
+  DNS_LOCAL_HOSTLIST_STORAGE_POST = DNS_LOCAL_HOSTLIST_INIT;
+
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+
+static void dns_init_local();
+#endif /* DNS_LOCAL_HOSTLIST */
+
+
+/* forward declarations */
+static void dns_recv(void *s, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port);
+static void dns_check_entries(void);
+
+/*-----------------------------------------------------------------------------
+ * Globales
+ *----------------------------------------------------------------------------*/
+
+/* DNS variables */
+static struct udp_pcb        *dns_pcb;
+static u8_t                   dns_seqno;
+static struct dns_table_entry dns_table[DNS_TABLE_SIZE];
+static struct ip_addr         dns_servers[DNS_MAX_SERVERS];
+
+#if (DNS_USES_STATIC_BUF == 1)
+static u8_t                   dns_payload[DNS_MSG_SIZE];
+#endif /* (DNS_USES_STATIC_BUF == 1) */
+
+/**
+ * Initialize the resolver: set up the UDP pcb and configure the default server
+ * (DNS_SERVER_ADDRESS).
+ */
+void
+dns_init()
+{
+  struct ip_addr dnsserver;
+  
+  /* initialize default DNS server address */
+  dnsserver.addr = DNS_SERVER_ADDRESS;
+
+  LWIP_DEBUGF(DNS_DEBUG, ("dns_init: initializing\n"));
+
+  /* if dns client not yet initialized... */
+  if (dns_pcb == NULL) {
+    dns_pcb = udp_new();
+
+    if (dns_pcb != NULL) {
+      /* initialize DNS table not needed (initialized to zero since it is a
+       * global variable) */
+      LWIP_ASSERT("For implicit initialization to work, DNS_STATE_UNUSED needs to be 0",
+        DNS_STATE_UNUSED == 0);
+
+      /* initialize DNS client */
+      udp_bind(dns_pcb, IP_ADDR_ANY, 0);
+      udp_recv(dns_pcb, dns_recv, NULL);
+
+      /* initialize default DNS primary server */
+      dns_setserver(0, &dnsserver);
+    }
+  }
+#if DNS_LOCAL_HOSTLIST
+  dns_init_local();
+#endif
+}
+
+/**
+ * Initialize one of the DNS servers.
+ *
+ * @param numdns the index of the DNS server to set must be < DNS_MAX_SERVERS
+ * @param dnsserver IP address of the DNS server to set
+ */
+void
+dns_setserver(u8_t numdns, struct ip_addr *dnsserver)
+{
+  if ((numdns < DNS_MAX_SERVERS) && (dns_pcb != NULL) &&
+      (dnsserver != NULL) && (dnsserver->addr !=0 )) {
+    dns_servers[numdns] = (*dnsserver);
+  }
+}
+
+/**
+ * Obtain one of the currently configured DNS server.
+ *
+ * @param numdns the index of the DNS server
+ * @return IP address of the indexed DNS server or "ip_addr_any" if the DNS
+ *         server has not been configured.
+ */
+struct ip_addr
+dns_getserver(u8_t numdns)
+{
+  if (numdns < DNS_MAX_SERVERS) {
+    return dns_servers[numdns];
+  } else {
+    return *IP_ADDR_ANY;
+  }
+}
+
+/**
+ * The DNS resolver client timer - handle retries and timeouts and should
+ * be called every DNS_TMR_INTERVAL milliseconds (every second by default).
+ */
+void
+dns_tmr(void)
+{
+  if (dns_pcb != NULL) {
+    LWIP_DEBUGF(DNS_DEBUG, ("dns_tmr: dns_check_entries\n"));
+    dns_check_entries();
+  }
+}
+
+#if DNS_LOCAL_HOSTLIST
+static void
+dns_init_local()
+{
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT)
+  int i;
+  struct local_hostlist_entry *entry;
+  /* Dynamic: copy entries from DNS_LOCAL_HOSTLIST_INIT to list */
+  struct local_hostlist_entry local_hostlist_init[] = DNS_LOCAL_HOSTLIST_INIT;
+  for (i = 0; i < sizeof(local_hostlist_init) / sizeof(struct local_hostlist_entry); i++) {
+    entry = mem_malloc(sizeof(struct local_hostlist_entry));
+    LWIP_ASSERT("mem-error in dns_init_local", entry != NULL);
+    if (entry != NULL) {
+      struct local_hostlist_entry *init_entry = &local_hostlist_init[i];
+      entry->name = init_entry->name;
+      entry->addr = init_entry->addr;
+      entry->next = local_hostlist_dynamic;
+      local_hostlist_dynamic = entry;
+    }
+  }
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC && defined(DNS_LOCAL_HOSTLIST_INIT) */
+}
+
+/**
+ * Scans the local host-list for a hostname.
+ *
+ * @param hostname Hostname to look for in the local host-list
+ * @return The first IP address for the hostname in the local host-list or
+ *         INADDR_NONE if not found.
+ */
+static u32_t
+dns_lookup_local(const char *hostname)
+{
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+  struct local_hostlist_entry *entry = local_hostlist_dynamic;
+  while(entry != NULL) {
+    if(strcmp(entry->name, hostname) == 0) {
+      return entry->addr;
+    }
+    entry = entry->next;
+  }
+#else /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+  int i;
+  for (i = 0; i < sizeof(local_hostlist_static) / sizeof(struct local_hostlist_entry); i++) {
+    if(strcmp(local_hostlist_static[i].name, hostname) == 0) {
+      return local_hostlist_static[i].addr;
+    }
+  }
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+  return INADDR_NONE;
+}
+
+#if DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+/** Remove all entries from the local host-list for a specific hostname
+ * and/or IP addess
+ *
+ * @param hostname hostname for which entries shall be removed from the local
+ *                 host-list
+ * @param addr address for which entries shall be removed from the local host-list
+ * @return the number of removed entries
+ */
+int
+dns_local_removehost(const char *hostname, const struct ip_addr *addr)
+{
+  int removed = 0;
+  struct local_hostlist_entry *entry = local_hostlist_dynamic;
+  struct local_hostlist_entry *last_entry = NULL;
+  while (entry != NULL) {
+    if (((hostname == NULL) || !strcmp(entry->name, hostname)) &&
+        ((addr == NULL) || (entry->addr == addr->addr))) {
+      struct local_hostlist_entry *free_entry;
+      if (last_entry != NULL) {
+        last_entry->next = entry->next;
+      } else {
+        local_hostlist_dynamic = entry->next;
+      }
+      free_entry = entry;
+      entry = entry->next;
+      mem_free(free_entry);
+      removed++;
+    } else {
+      last_entry = entry;
+      entry = entry->next;
+    }
+  }
+  return removed;
+}
+
+/**
+ * Add a hostname/IP address pair to the local host-list.
+ * Duplicates are not checked.
+ *
+ * @param hostname hostname of the new entry
+ * @param addr IP address of the new entry
+ * @return ERR_OK if succeeded or ERR_MEM on memory error
+ */
+err_t
+dns_local_addhost(const char *hostname, const struct ip_addr *addr)
+{
+  struct local_hostlist_entry *entry;
+  entry = mem_malloc(sizeof(struct local_hostlist_entry));
+  if (entry == NULL) {
+    return ERR_MEM;
+  }
+  entry->name = hostname;
+  entry->addr = addr->addr;
+  entry->next = local_hostlist_dynamic;
+  local_hostlist_dynamic = entry;
+  return ERR_OK;
+}
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC*/
+#endif /* DNS_LOCAL_HOSTLIST */
+
+/**
+ * Look up a hostname in the array of known hostnames.
+ *
+ * @note This function only looks in the internal array of known
+ * hostnames, it does not send out a query for the hostname if none
+ * was found. The function dns_enqueue() can be used to send a query
+ * for a hostname.
+ *
+ * @param name the hostname to look up
+ * @return the hostname's IP address, as u32_t (instead of struct ip_addr to
+ *         better check for failure: != INADDR_NONE) or INADDR_NONE if the hostname
+ *         was not found in the cached dns_table.
+ */
+static u32_t
+dns_lookup(const char *name)
+{
+  u8_t i;
+#if DNS_LOCAL_HOSTLIST || defined(DNS_LOOKUP_LOCAL_EXTERN)
+  u32_t addr;
+#endif /* DNS_LOCAL_HOSTLIST || defined(DNS_LOOKUP_LOCAL_EXTERN) */
+#if DNS_LOCAL_HOSTLIST
+  if ((addr = dns_lookup_local(name)) != INADDR_NONE) {
+    return addr;
+  }
+#endif /* DNS_LOCAL_HOSTLIST */
+#ifdef DNS_LOOKUP_LOCAL_EXTERN
+  if((addr = DNS_LOOKUP_LOCAL_EXTERN(name)) != INADDR_NONE) {
+    return addr;
+  }
+#endif /* DNS_LOOKUP_LOCAL_EXTERN */
+
+  /* Walk through name list, return entry if found. If not, return NULL. */
+  for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+    if ((dns_table[i].state == DNS_STATE_DONE) &&
+        (strcmp(name, dns_table[i].name) == 0)) {
+      LWIP_DEBUGF(DNS_DEBUG, ("dns_lookup: \"%s\": found = ", name));
+      ip_addr_debug_print(DNS_DEBUG, &(dns_table[i].ipaddr));
+      LWIP_DEBUGF(DNS_DEBUG, ("\n"));
+      return dns_table[i].ipaddr.addr;
+    }
+  }
+
+  return INADDR_NONE;
+}
+
+#if DNS_DOES_NAME_CHECK
+/**
+ * Compare the "dotted" name "query" with the encoded name "response"
+ * to make sure an answer from the DNS server matches the current dns_table
+ * entry (otherwise, answers might arrive late for hostname not on the list
+ * any more).
+ *
+ * @param query hostname (not encoded) from the dns_table
+ * @param response encoded hostname in the DNS response
+ * @return 0: names equal; 1: names differ
+ */
+static u8_t
+dns_compare_name(unsigned char *query, unsigned char *response)
+{
+  unsigned char n;
+
+  do {
+    n = *response++;
+    /** @see RFC 1035 - 4.1.4. Message compression */
+    if ((n & 0xc0) == 0xc0) {
+      /* Compressed name */
+      break;
+    } else {
+      /* Not compressed name */
+      while (n > 0) {
+        if ((*query) != (*response)) {
+          return 1;
+        }
+        ++response;
+        ++query;
+        --n;
+      };
+      ++query;
+    }
+  } while (*response != 0);
+
+  return 0;
+}
+#endif /* DNS_DOES_NAME_CHECK */
+
+/**
+ * Walk through a compact encoded DNS name and return the end of the name.
+ *
+ * @param query encoded DNS name in the DNS server response
+ * @return end of the name
+ */
+static unsigned char *
+dns_parse_name(unsigned char *query)
+{
+  unsigned char n;
+
+  do {
+    n = *query++;
+    /** @see RFC 1035 - 4.1.4. Message compression */
+    if ((n & 0xc0) == 0xc0) {
+      /* Compressed name */
+      break;
+    } else {
+      /* Not compressed name */
+      while (n > 0) {
+        ++query;
+        --n;
+      };
+    }
+  } while (*query != 0);
+
+  return query + 1;
+}
+
+/**
+ * Send a DNS query packet.
+ *
+ * @param numdns index of the DNS server in the dns_servers table
+ * @param name hostname to query
+ * @param id index of the hostname in dns_table, used as transaction ID in the
+ *        DNS query packet
+ * @return ERR_OK if packet is sent; an err_t indicating the problem otherwise
+ */
+static err_t
+dns_send(u8_t numdns, const char* name, u8_t id)
+{
+  err_t err;
+  struct dns_hdr *hdr;
+  struct dns_query qry;
+  struct pbuf *p;
+  char *query, *nptr;
+  const char *pHostname;
+  u8_t n;
+
+  LWIP_DEBUGF(DNS_DEBUG, ("dns_send: dns_servers[%"U16_F"] \"%s\": request\n",
+              (u16_t)(numdns), name));
+  LWIP_ASSERT("dns server out of array", numdns < DNS_MAX_SERVERS);
+  LWIP_ASSERT("dns server has no IP address set", dns_servers[numdns].addr != 0);
+
+  /* if here, we have either a new query or a retry on a previous query to process */
+  p = pbuf_alloc(PBUF_TRANSPORT, SIZEOF_DNS_HDR + DNS_MAX_NAME_LENGTH +
+                 SIZEOF_DNS_QUERY, PBUF_RAM);
+  if (p != NULL) {
+    LWIP_ASSERT("pbuf must be in one piece", p->next == NULL);
+    /* fill dns header */
+    hdr = (struct dns_hdr*)p->payload;
+    memset(hdr, 0, SIZEOF_DNS_HDR);
+    hdr->id = htons(id);
+    hdr->flags1 = DNS_FLAG1_RD;
+    hdr->numquestions = htons(1);
+    query = (char*)hdr + SIZEOF_DNS_HDR;
+    pHostname = name;
+    --pHostname;
+
+    /* convert hostname into suitable query format. */
+    do {
+      ++pHostname;
+      nptr = query;
+      ++query;
+      for(n = 0; *pHostname != '.' && *pHostname != 0; ++pHostname) {
+        *query = *pHostname;
+        ++query;
+        ++n;
+      }
+      *nptr = n;
+    } while(*pHostname != 0);
+    *query++='\0';
+
+    /* fill dns query */
+    qry.type  = htons(DNS_RRTYPE_A);
+    qry.class = htons(DNS_RRCLASS_IN);
+    MEMCPY( query, &qry, SIZEOF_DNS_QUERY);
+
+    /* resize pbuf to the exact dns query */
+    pbuf_realloc(p, (query + SIZEOF_DNS_QUERY) - ((char*)(p->payload)));
+
+    /* connect to the server for faster receiving */
+    udp_connect(dns_pcb, &dns_servers[numdns], DNS_SERVER_PORT);
+    /* send dns packet */
+    err = udp_sendto(dns_pcb, p, &dns_servers[numdns], DNS_SERVER_PORT);
+
+    /* free pbuf */
+    pbuf_free(p);
+  } else {
+    err = ERR_MEM;
+  }
+
+  return err;
+}
+
+/**
+ * dns_check_entry() - see if pEntry has not yet been queried and, if so, sends out a query.
+ * Check an entry in the dns_table:
+ * - send out query for new entries
+ * - retry old pending entries on timeout (also with different servers)
+ * - remove completed entries from the table if their TTL has expired
+ *
+ * @param i index of the dns_table entry to check
+ */
+static void
+dns_check_entry(u8_t i)
+{
+  struct dns_table_entry *pEntry = &dns_table[i];
+
+  LWIP_ASSERT("array index out of bounds", i < DNS_TABLE_SIZE);
+
+  switch(pEntry->state) {
+
+    case DNS_STATE_NEW: {
+      /* initialize new entry */
+      pEntry->state   = DNS_STATE_ASKING;
+      pEntry->numdns  = 0;
+      pEntry->tmr     = 1;
+      pEntry->retries = 0;
+      
+      /* send DNS packet for this entry */
+      dns_send(pEntry->numdns, pEntry->name, i);
+      break;
+    }
+
+    case DNS_STATE_ASKING: {
+      if (--pEntry->tmr == 0) {
+        if (++pEntry->retries == DNS_MAX_RETRIES) {
+          if ((pEntry->numdns+1<DNS_MAX_SERVERS) && (dns_servers[pEntry->numdns+1].addr!=0)) {
+            /* change of server */
+            pEntry->numdns++;
+            pEntry->tmr     = 1;
+            pEntry->retries = 0;
+            break;
+          } else {
+            LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entry: \"%s\": timeout\n", pEntry->name));
+            /* call specified callback function if provided */
+            if (pEntry->found)
+              (*pEntry->found)(pEntry->name, NULL, pEntry->arg);
+            /* flush this entry */
+            pEntry->state   = DNS_STATE_UNUSED;
+            pEntry->found   = NULL;
+            break;
+          }
+        }
+
+        /* wait longer for the next retry */
+        pEntry->tmr = pEntry->retries;
+
+        /* send DNS packet for this entry */
+        dns_send(pEntry->numdns, pEntry->name, i);
+      }
+      break;
+    }
+
+    case DNS_STATE_DONE: {
+      /* if the time to live is nul */
+      if (--pEntry->ttl == 0) {
+        LWIP_DEBUGF(DNS_DEBUG, ("dns_check_entry: \"%s\": flush\n", pEntry->name));
+        /* flush this entry */
+        pEntry->state = DNS_STATE_UNUSED;
+        pEntry->found = NULL;
+      }
+      break;
+    }
+    case DNS_STATE_UNUSED:
+      /* nothing to do */
+      break;
+    default:
+      LWIP_ASSERT("unknown dns_table entry state:", 0);
+      break;
+  }
+}
+
+/**
+ * Call dns_check_entry for each entry in dns_table - check all entries.
+ */
+static void
+dns_check_entries(void)
+{
+  u8_t i;
+
+  for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+    dns_check_entry(i);
+  }
+}
+
+/**
+ * Receive input function for DNS response packets arriving for the dns UDP pcb.
+ *
+ * @params see udp.h
+ */
+static void
+dns_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port)
+{
+  u8_t i;
+  char *pHostname;
+  struct dns_hdr *hdr;
+  struct dns_answer ans;
+  struct dns_table_entry *pEntry;
+  u8_t nquestions, nanswers;
+#if (DNS_USES_STATIC_BUF == 0)
+  u8_t dns_payload[DNS_MSG_SIZE];
+#endif /* (DNS_USES_STATIC_BUF == 0) */
+#if (DNS_USES_STATIC_BUF == 2)
+  u8_t* dns_payload;
+#endif /* (DNS_USES_STATIC_BUF == 2) */
+
+  LWIP_UNUSED_ARG(arg);
+  LWIP_UNUSED_ARG(pcb);
+  LWIP_UNUSED_ARG(addr);
+  LWIP_UNUSED_ARG(port);
+
+  /* is the dns message too big ? */
+  if (p->tot_len > DNS_MSG_SIZE) {
+    LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: pbuf too big\n"));
+    /* free pbuf and return */
+    goto memerr1;
+  }
+
+  /* is the dns message big enough ? */
+  if (p->tot_len < (SIZEOF_DNS_HDR + SIZEOF_DNS_QUERY + SIZEOF_DNS_ANSWER)) {
+    LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: pbuf too small\n"));
+    /* free pbuf and return */
+    goto memerr1;
+  }
+
+#if (DNS_USES_STATIC_BUF == 2)
+  dns_payload = mem_malloc(p->tot_len);
+  if (dns_payload == NULL) {
+    LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: mem_malloc error\n"));
+    /* free pbuf and return */
+    goto memerr1;
+  }
+#endif /* (DNS_USES_STATIC_BUF == 2) */
+
+  /* copy dns payload inside static buffer for processing */ 
+  if (pbuf_copy_partial(p, dns_payload, p->tot_len, 0) == p->tot_len) {
+    /* The ID in the DNS header should be our entry into the name table. */
+    hdr = (struct dns_hdr*)dns_payload;
+    i = htons(hdr->id);
+    if (i < DNS_TABLE_SIZE) {
+      pEntry = &dns_table[i];
+      if(pEntry->state == DNS_STATE_ASKING) {
+        /* This entry is now completed. */
+        pEntry->state = DNS_STATE_DONE;
+        pEntry->err   = hdr->flags2 & DNS_FLAG2_ERR_MASK;
+
+        /* We only care about the question(s) and the answers. The authrr
+           and the extrarr are simply discarded. */
+        nquestions = htons(hdr->numquestions);
+        nanswers   = htons(hdr->numanswers);
+
+        /* Check for error. If so, call callback to inform. */
+        if (((hdr->flags1 & DNS_FLAG1_RESPONSE) == 0) || (pEntry->err != 0) || (nquestions != 1)) {
+          LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": error in flags\n", pEntry->name));
+          /* call callback to indicate error, clean up memory and return */
+          goto responseerr;
+        }
+
+#if DNS_DOES_NAME_CHECK
+        /* Check if the name in the "question" part match with the name in the entry. */
+        if (dns_compare_name((unsigned char *)(pEntry->name), (unsigned char *)dns_payload + SIZEOF_DNS_HDR) != 0) {
+          LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": response not match to query\n", pEntry->name));
+          /* call callback to indicate error, clean up memory and return */
+          goto responseerr;
+        }
+#endif /* DNS_DOES_NAME_CHECK */
+
+        /* Skip the name in the "question" part */
+        pHostname = (char *) dns_parse_name((unsigned char *)dns_payload + SIZEOF_DNS_HDR) + SIZEOF_DNS_QUERY;
+
+        while(nanswers > 0) {
+          /* skip answer resource record's host name */
+          pHostname = (char *) dns_parse_name((unsigned char *)pHostname);
+
+          /* Check for IP address type and Internet class. Others are discarded. */
+          MEMCPY(&ans, pHostname, SIZEOF_DNS_ANSWER);
+          if((ntohs(ans.type) == DNS_RRTYPE_A) && (ntohs(ans.class) == DNS_RRCLASS_IN) && (ntohs(ans.len) == sizeof(struct ip_addr)) ) {
+            /* read the answer resource record's TTL, and maximize it if needed */
+            pEntry->ttl = ntohl(ans.ttl);
+            if (pEntry->ttl > DNS_MAX_TTL) {
+              pEntry->ttl = DNS_MAX_TTL;
+            }
+            /* read the IP address after answer resource record's header */
+            MEMCPY( &(pEntry->ipaddr), (pHostname+SIZEOF_DNS_ANSWER), sizeof(struct ip_addr));
+            LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": response = ", pEntry->name));
+            ip_addr_debug_print(DNS_DEBUG, (&(pEntry->ipaddr)));
+            LWIP_DEBUGF(DNS_DEBUG, ("\n"));
+            /* call specified callback function if provided */
+            if (pEntry->found) {
+              (*pEntry->found)(pEntry->name, &pEntry->ipaddr, pEntry->arg);
+            }
+            /* deallocate memory and return */
+            goto memerr2;
+          } else {
+            pHostname = pHostname + SIZEOF_DNS_ANSWER + htons(ans.len);
+          }
+          --nanswers;
+        }
+        LWIP_DEBUGF(DNS_DEBUG, ("dns_recv: \"%s\": error in response\n", pEntry->name));
+        /* call callback to indicate error, clean up memory and return */
+        goto responseerr;
+      }
+    }
+  }
+
+  /* deallocate memory and return */
+  goto memerr2;
+
+responseerr:
+  /* ERROR: call specified callback function with NULL as name to indicate an error */
+  if (pEntry->found) {
+    (*pEntry->found)(pEntry->name, NULL, pEntry->arg);
+  }
+  /* flush this entry */
+  pEntry->state = DNS_STATE_UNUSED;
+  pEntry->found = NULL;
+
+memerr2:
+#if (DNS_USES_STATIC_BUF == 2)
+  /* free dns buffer */
+  mem_free(dns_payload);
+#endif /* (DNS_USES_STATIC_BUF == 2) */
+
+memerr1:
+  /* free pbuf */
+  pbuf_free(p);
+  return;
+}
+
+/**
+ * Queues a new hostname to resolve and sends out a DNS query for that hostname
+ *
+ * @param name the hostname that is to be queried
+ * @param found a callback founction to be called on success, failure or timeout
+ * @param callback_arg argument to pass to the callback function
+ * @return @return a err_t return code.
+ */
+static err_t
+dns_enqueue(const char *name, dns_found_callback found, void *callback_arg)
+{
+  u8_t i;
+  u8_t lseq, lseqi;
+  struct dns_table_entry *pEntry = NULL;
+
+  /* search an unused entry, or the oldest one */
+  lseq = lseqi = 0;
+  for (i = 0; i < DNS_TABLE_SIZE; ++i) {
+    pEntry = &dns_table[i];
+    /* is it an unused entry ? */
+    if (pEntry->state == DNS_STATE_UNUSED)
+      break;
+
+    /* check if this is the oldest completed entry */
+    if (pEntry->state == DNS_STATE_DONE) {
+      if ((dns_seqno - pEntry->seqno) > lseq) {
+        lseq = dns_seqno - pEntry->seqno;
+        lseqi = i;
+      }
+    }
+  }
+
+  /* if we don't have found an unused entry, use the oldest completed one */
+  if (i == DNS_TABLE_SIZE) {
+    if ((lseqi >= DNS_TABLE_SIZE) || (dns_table[lseqi].state != DNS_STATE_DONE)) {
+      /* no entry can't be used now, table is full */
+      LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: \"%s\": DNS entries table is full\n", name));
+      return ERR_MEM;
+    } else {
+      /* use the oldest completed one */
+      i = lseqi;
+      pEntry = &dns_table[i];
+    }
+  }
+
+  /* use this entry */
+  LWIP_DEBUGF(DNS_DEBUG, ("dns_enqueue: \"%s\": use DNS entry %"U16_F"\n", name, (u16_t)(i)));
+
+  /* fill the entry */
+  pEntry->state = DNS_STATE_NEW;
+  pEntry->seqno = dns_seqno++;
+  pEntry->found = found;
+  pEntry->arg   = callback_arg;
+  strcpy(pEntry->name, name);
+
+  /* force to send query without waiting timer */
+  dns_check_entry(i);
+
+  /* dns query is enqueued */
+  return ERR_INPROGRESS;
+}
+
+/**
+ * Resolve a hostname (string) into an IP address.
+ * NON-BLOCKING callback version for use with raw API!!!
+ *
+ * Returns immediately with one of err_t return codes:
+ * - ERR_OK if hostname is a valid IP address string or the host
+ *   name is already in the local names table.
+ * - ERR_INPROGRESS enqueue a request to be sent to the DNS server
+ *   for resolution if no errors are present.
+ *
+ * @param hostname the hostname that is to be queried
+ * @param addr pointer to a struct ip_addr where to store the address if it is already
+ *             cached in the dns_table (only valid if ERR_OK is returned!)
+ * @param found a callback function to be called on success, failure or timeout (only if
+ *              ERR_INPROGRESS is returned!)
+ * @param callback_arg argument to pass to the callback function
+ * @return a err_t return code.
+ */
+err_t
+dns_gethostbyname(const char *hostname, struct ip_addr *addr, dns_found_callback found,
+                  void *callback_arg)
+{
+  /* not initialized or no valid server yet, or invalid addr pointer
+   * or invalid hostname or invalid hostname length */
+  if ((dns_pcb == NULL) || (addr == NULL) ||
+      (!hostname) || (!hostname[0]) ||
+      (strlen(hostname) >= DNS_MAX_NAME_LENGTH)) {
+    return ERR_VAL;
+  }
+
+#if LWIP_HAVE_LOOPIF
+  if (strcmp(hostname,"localhost")==0) {
+    addr->addr = INADDR_LOOPBACK;
+    return ERR_OK;
+  }
+#endif /* LWIP_HAVE_LOOPIF */
+
+  /* host name already in octet notation? set ip addr and return ERR_OK
+   * already have this address cached? */
+  if (((addr->addr = inet_addr(hostname)) != INADDR_NONE) ||
+      ((addr->addr = dns_lookup(hostname)) != INADDR_NONE)) {
+    return ERR_OK;
+  }
+
+  /* queue query with specified callback */
+  return dns_enqueue(hostname, found, callback_arg);
+}
+
+#endif /* LWIP_DNS */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/init.c b/firmware/x300/lwip/lwip-1.3.1/src/core/init.c
new file mode 100644
index 000000000..277811a6a
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/init.c
@@ -0,0 +1,269 @@
+/**
+ * @file
+ * Modules initialization
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/init.h"
+#include "lwip/stats.h"
+#include "lwip/sys.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/pbuf.h"
+#include "lwip/netif.h"
+#include "lwip/sockets.h"
+#include "lwip/ip.h"
+#include "lwip/raw.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+#include "lwip/snmp_msg.h"
+#include "lwip/autoip.h"
+#include "lwip/igmp.h"
+#include "lwip/dns.h"
+#include "netif/etharp.h"
+
+/* Compile-time sanity checks for configuration errors.
+ * These can be done independently of LWIP_DEBUG, without penalty.
+ */
+#ifndef BYTE_ORDER
+  #error "BYTE_ORDER is not defined, you have to define it in your cc.h"
+#endif
+#if (!IP_SOF_BROADCAST && IP_SOF_BROADCAST_RECV)
+  #error "If you want to use broadcast filter per pcb on recv operations, you have to define IP_SOF_BROADCAST=1 in your lwipopts.h"
+#endif
+#if (!LWIP_ARP && ARP_QUEUEING)
+  #error "If you want to use ARP Queueing, you have to define LWIP_ARP=1 in your lwipopts.h"
+#endif
+#if (!LWIP_UDP && LWIP_UDPLITE)
+  #error "If you want to use UDP Lite, you have to define LWIP_UDP=1 in your lwipopts.h"
+#endif
+#if (!LWIP_UDP && LWIP_SNMP)
+  #error "If you want to use SNMP, you have to define LWIP_UDP=1 in your lwipopts.h"
+#endif
+#if (!LWIP_UDP && LWIP_DHCP)
+  #error "If you want to use DHCP, you have to define LWIP_UDP=1 in your lwipopts.h"
+#endif
+#if (!LWIP_UDP && LWIP_IGMP)
+  #error "If you want to use IGMP, you have to define LWIP_UDP=1 in your lwipopts.h"
+#endif
+#if (!LWIP_UDP && LWIP_DNS)
+  #error "If you want to use DNS, you have to define LWIP_UDP=1 in your lwipopts.h"
+#endif
+#if (LWIP_ARP && (ARP_TABLE_SIZE > 0x7f))
+  #error "If you want to use ARP, ARP_TABLE_SIZE must fit in an s8_t, so, you have to reduce it in your lwipopts.h"
+#endif
+#if (LWIP_ARP && ARP_QUEUEING && (MEMP_NUM_ARP_QUEUE<=0))
+  #error "If you want to use ARP Queueing, you have to define MEMP_NUM_ARP_QUEUE>=1 in your lwipopts.h"
+#endif
+#if (LWIP_RAW && (MEMP_NUM_RAW_PCB<=0))
+  #error "If you want to use RAW, you have to define MEMP_NUM_RAW_PCB>=1 in your lwipopts.h"
+#endif
+#if (LWIP_UDP && (MEMP_NUM_UDP_PCB<=0))
+  #error "If you want to use UDP, you have to define MEMP_NUM_UDP_PCB>=1 in your lwipopts.h"
+#endif
+#if (LWIP_TCP && (MEMP_NUM_TCP_PCB<=0))
+  #error "If you want to use TCP, you have to define MEMP_NUM_TCP_PCB>=1 in your lwipopts.h"
+#endif
+#if (LWIP_TCP && (TCP_WND > 0xffff))
+  #error "If you want to use TCP, TCP_WND must fit in an u16_t, so, you have to reduce it in your lwipopts.h"
+#endif
+#if (LWIP_TCP && (TCP_SND_QUEUELEN > 0xffff))
+  #error "If you want to use TCP, TCP_SND_QUEUELEN must fit in an u16_t, so, you have to reduce it in your lwipopts.h"
+#endif
+#if (LWIP_TCP && ((TCP_MAXRTX > 12) || (TCP_SYNMAXRTX > 12)))
+  #error "If you want to use TCP, TCP_MAXRTX and TCP_SYNMAXRTX must less or equal to 12 (due to tcp_backoff table), so, you have to reduce them in your lwipopts.h"
+#endif
+#if (LWIP_TCP && TCP_LISTEN_BACKLOG && (TCP_DEFAULT_LISTEN_BACKLOG < 0) || (TCP_DEFAULT_LISTEN_BACKLOG > 0xff))
+  #error "If you want to use TCP backlog, TCP_DEFAULT_LISTEN_BACKLOG must fit into an u8_t"
+#endif
+#if (LWIP_IGMP && (MEMP_NUM_IGMP_GROUP<=1))
+  #error "If you want to use IGMP, you have to define MEMP_NUM_IGMP_GROUP>1 in your lwipopts.h"
+#endif
+#if (PPP_SUPPORT && (NO_SYS==1))
+  #error "If you want to use PPP, you have to define NO_SYS=0 in your lwipopts.h"
+#endif 
+#if (LWIP_NETIF_API && (NO_SYS==1))
+  #error "If you want to use NETIF API, you have to define NO_SYS=0 in your lwipopts.h"
+#endif
+#if ((LWIP_SOCKET || LWIP_NETCONN) && (NO_SYS==1))
+  #error "If you want to use Sequential API, you have to define NO_SYS=0 in your lwipopts.h"
+#endif
+#if ((LWIP_NETCONN || LWIP_SOCKET) && (MEMP_NUM_TCPIP_MSG_API<=0))
+  #error "If you want to use Sequential API, you have to define MEMP_NUM_TCPIP_MSG_API>=1 in your lwipopts.h"
+#endif
+#if (!LWIP_NETCONN && LWIP_SOCKET)
+  #error "If you want to use Socket API, you have to define LWIP_NETCONN=1 in your lwipopts.h"
+#endif
+#if (((!LWIP_DHCP) || (!LWIP_AUTOIP)) && LWIP_DHCP_AUTOIP_COOP)
+  #error "If you want to use DHCP/AUTOIP cooperation mode, you have to define LWIP_DHCP=1 and LWIP_AUTOIP=1 in your lwipopts.h"
+#endif
+#if (((!LWIP_DHCP) || (!LWIP_ARP)) && DHCP_DOES_ARP_CHECK)
+  #error "If you want to use DHCP ARP checking, you have to define LWIP_DHCP=1 and LWIP_ARP=1 in your lwipopts.h"
+#endif
+#if (!LWIP_ARP && LWIP_AUTOIP)
+  #error "If you want to use AUTOIP, you have to define LWIP_ARP=1 in your lwipopts.h"
+#endif
+#if (LWIP_SNMP && (SNMP_CONCURRENT_REQUESTS<=0))
+  #error "If you want to use SNMP, you have to define SNMP_CONCURRENT_REQUESTS>=1 in your lwipopts.h"
+#endif
+#if (LWIP_SNMP && (SNMP_TRAP_DESTINATIONS<=0))
+  #error "If you want to use SNMP, you have to define SNMP_TRAP_DESTINATIONS>=1 in your lwipopts.h"
+#endif
+#if (LWIP_TCP && ((LWIP_EVENT_API && LWIP_CALLBACK_API) || (!LWIP_EVENT_API && !LWIP_CALLBACK_API)))
+  #error "One and exactly one of LWIP_EVENT_API and LWIP_CALLBACK_API has to be enabled in your lwipopts.h"
+#endif
+/* There must be sufficient timeouts, taking into account requirements of the subsystems. */
+#if ((NO_SYS==0) && (MEMP_NUM_SYS_TIMEOUT < (LWIP_TCP + IP_REASSEMBLY + LWIP_ARP + (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_DNS + PPP_SUPPORT)))
+  #error "MEMP_NUM_SYS_TIMEOUT is too low to accomodate all required timeouts"
+#endif
+#if (IP_REASSEMBLY && (MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS))
+  #error "MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS doesn't make sense since each struct ip_reassdata must hold 2 pbufs at least!"
+#endif
+#if (MEM_LIBC_MALLOC && MEM_USE_POOLS)
+  #error "MEM_LIBC_MALLOC and MEM_USE_POOLS may not both be simultaneously enabled in your lwipopts.h"
+#endif
+#if (MEM_USE_POOLS && !MEMP_USE_CUSTOM_POOLS)
+  #error "MEM_USE_POOLS requires custom pools (MEMP_USE_CUSTOM_POOLS) to be enabled in your lwipopts.h"
+#endif
+#if (PBUF_POOL_BUFSIZE <= MEM_ALIGNMENT)
+  #error "PBUF_POOL_BUFSIZE must be greater than MEM_ALIGNMENT or the offset may take the full first pbuf"
+#endif
+#if (TCP_QUEUE_OOSEQ && !LWIP_TCP)
+  #error "TCP_QUEUE_OOSEQ requires LWIP_TCP"
+#endif
+#if (DNS_LOCAL_HOSTLIST && !DNS_LOCAL_HOSTLIST_IS_DYNAMIC && !(defined(DNS_LOCAL_HOSTLIST_INIT)))
+  #error "you have to define define DNS_LOCAL_HOSTLIST_INIT {{'host1', 0x123}, {'host2', 0x234}} to initialize DNS_LOCAL_HOSTLIST"
+#endif
+
+
+/* Compile-time checks for deprecated options.
+ */
+#ifdef MEMP_NUM_TCPIP_MSG
+  #error "MEMP_NUM_TCPIP_MSG option is deprecated. Remove it from your lwipopts.h."
+#endif
+#ifdef MEMP_NUM_API_MSG
+  #error "MEMP_NUM_API_MSG option is deprecated. Remove it from your lwipopts.h."
+#endif
+#ifdef TCP_REXMIT_DEBUG
+  #error "TCP_REXMIT_DEBUG option is deprecated. Remove it from your lwipopts.h."
+#endif
+#ifdef RAW_STATS
+  #error "RAW_STATS option is deprecated. Remove it from your lwipopts.h."
+#endif
+#ifdef ETHARP_QUEUE_FIRST
+  #error "ETHARP_QUEUE_FIRST option is deprecated. Remove it from your lwipopts.h."
+#endif
+#ifdef ETHARP_ALWAYS_INSERT
+  #error "ETHARP_ALWAYS_INSERT option is deprecated. Remove it from your lwipopts.h."
+#endif
+#if SO_REUSE
+/* I removed the lot since this was an ugly hack. It broke the raw-API.
+   It also came with many ugly goto's, Christiaan Simons. */
+  #error "SO_REUSE currently unavailable, this was a hack"
+#endif
+
+#ifdef LWIP_DEBUG
+static void
+lwip_sanity_check(void)
+{
+  /* Warnings */
+#if LWIP_NETCONN
+  if (MEMP_NUM_NETCONN > (MEMP_NUM_TCP_PCB+MEMP_NUM_TCP_PCB_LISTEN+MEMP_NUM_UDP_PCB+MEMP_NUM_RAW_PCB))
+    LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: MEMP_NUM_NETCONN should be less than the sum of MEMP_NUM_{TCP,RAW,UDP}_PCB+MEMP_NUM_TCP_PCB_LISTEN\n"));
+#endif /* LWIP_NETCONN */
+#if LWIP_TCP
+  if (MEMP_NUM_TCP_SEG < TCP_SND_QUEUELEN)
+    LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: MEMP_NUM_TCP_SEG should be at least as big as TCP_SND_QUEUELEN\n"));
+  if (TCP_SND_QUEUELEN < (2 * (TCP_SND_BUF/TCP_MSS)))
+    LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_SND_QUEUELEN must be at least as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work\n"));
+  if (TCP_SNDLOWAT > TCP_SND_BUF)
+    LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_SNDLOWAT must be less than or equal to TCP_SND_BUF.\n"));
+  if (TCP_WND > (PBUF_POOL_SIZE*PBUF_POOL_BUFSIZE))
+    LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_WND is larger than space provided by PBUF_POOL_SIZE*PBUF_POOL_BUFSIZE\n"));
+  if (TCP_WND < TCP_MSS)
+    LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_WND is smaller than MSS\n"));
+#endif /* LWIP_TCP */
+}
+#else  /* LWIP_DEBUG */
+#define lwip_sanity_check()
+#endif /* LWIP_DEBUG */
+
+/**
+ * Perform Sanity check of user-configurable values, and initialize all modules.
+ */
+void
+lwip_init(void)
+{
+  /* Sanity check user-configurable values */
+  lwip_sanity_check();
+
+  /* Modules initialization */
+  stats_init();
+  sys_init();
+  mem_init();
+  memp_init();
+  pbuf_init();
+  netif_init();
+#if LWIP_SOCKET
+  lwip_socket_init();
+#endif /* LWIP_SOCKET */
+  ip_init();
+#if LWIP_ARP
+  etharp_init();
+#endif /* LWIP_ARP */
+#if LWIP_RAW
+  raw_init();
+#endif /* LWIP_RAW */
+#if LWIP_UDP
+  udp_init();
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+  tcp_init();
+#endif /* LWIP_TCP */
+#if LWIP_SNMP
+  snmp_init();
+#endif /* LWIP_SNMP */
+#if LWIP_AUTOIP
+  autoip_init();
+#endif /* LWIP_AUTOIP */
+#if LWIP_IGMP
+  igmp_init();
+#endif /* LWIP_IGMP */
+#if LWIP_DNS
+  dns_init();
+#endif /* LWIP_DNS */
+}
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/autoip.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/autoip.c
new file mode 100644
index 000000000..367adb060
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/autoip.c
@@ -0,0 +1,453 @@
+/**
+ * @file
+ * AutoIP Automatic LinkLocal IP Configuration
+ *
+ */
+
+/*
+ *
+ * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Dominik Spies <kontakt@dspies.de>
+ *
+ * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
+ * with RFC 3927.
+ *
+ *
+ * Please coordinate changes and requests with Dominik Spies
+ * <kontakt@dspies.de>
+ */
+
+/*******************************************************************************
+ * USAGE:
+ * 
+ * define LWIP_AUTOIP 1  in your lwipopts.h
+ * 
+ * If you don't use tcpip.c (so, don't call, you don't call tcpip_init):
+ * - First, call autoip_init().
+ * - call autoip_tmr() all AUTOIP_TMR_INTERVAL msces,
+ *   that should be defined in autoip.h.
+ *   I recommend a value of 100. The value must divide 1000 with a remainder almost 0.
+ *   Possible values are 1000, 500, 333, 250, 200, 166, 142, 125, 111, 100 ....
+ *
+ * Without DHCP:
+ * - Call autoip_start() after netif_add().
+ * 
+ * With DHCP:
+ * - define LWIP_DHCP_AUTOIP_COOP 1 in your lwipopts.h.
+ * - Configure your DHCP Client.
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/mem.h"
+#include "lwip/udp.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/autoip.h"
+#include "netif/etharp.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+/* 169.254.0.0 */
+#define AUTOIP_NET         0xA9FE0000
+/* 169.254.1.0 */
+#define AUTOIP_RANGE_START (AUTOIP_NET | 0x0100)
+/* 169.254.254.255 */
+#define AUTOIP_RANGE_END   (AUTOIP_NET | 0xFEFF)
+
+
+/** Pseudo random macro based on netif informations.
+ * You could use "rand()" from the C Library if you define LWIP_AUTOIP_RAND in lwipopts.h */
+#ifndef LWIP_AUTOIP_RAND
+#define LWIP_AUTOIP_RAND(netif) ( (((u32_t)((netif->hwaddr[5]) & 0xff) << 24) | \
+                                   ((u32_t)((netif->hwaddr[3]) & 0xff) << 16) | \
+                                   ((u32_t)((netif->hwaddr[2]) & 0xff) << 8) | \
+                                   ((u32_t)((netif->hwaddr[4]) & 0xff))) + \
+                                   (netif->autoip?netif->autoip->tried_llipaddr:0))
+#endif /* LWIP_AUTOIP_RAND */
+
+/**
+ * Macro that generates the initial IP address to be tried by AUTOIP.
+ * If you want to override this, define it to something else in lwipopts.h.
+ */
+#ifndef LWIP_AUTOIP_CREATE_SEED_ADDR
+#define LWIP_AUTOIP_CREATE_SEED_ADDR(netif) \
+  (AUTOIP_RANGE_START + ((u32_t)(((u8_t)(netif->hwaddr[4])) | \
+                 ((u32_t)((u8_t)(netif->hwaddr[5]))) << 8)))
+#endif /* LWIP_AUTOIP_CREATE_SEED_ADDR */
+
+/* static functions */
+static void autoip_handle_arp_conflict(struct netif *netif);
+
+/* creates a pseudo random LL IP-Address for a network interface */
+static void autoip_create_addr(struct netif *netif, struct ip_addr *IPAddr);
+
+/* sends an ARP announce */
+static err_t autoip_arp_announce(struct netif *netif);
+
+/* configure interface for use with current LL IP-Address */
+static err_t autoip_bind(struct netif *netif);
+
+/**
+ * Initialize this module
+ */
+void
+autoip_init(void)
+{
+  LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | 3, ("autoip_init()\n"));
+}
+
+/**
+ * Handle a IP address conflict after an ARP conflict detection
+ */
+static void
+autoip_handle_arp_conflict(struct netif *netif)
+{
+  /* Somehow detect if we are defending or retreating */
+  unsigned char defend = 1; /* tbd */
+
+  if(defend) {
+    if(netif->autoip->lastconflict > 0) {
+      /* retreat, there was a conflicting ARP in the last
+       * DEFEND_INTERVAL seconds
+       */
+      LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 1,
+        ("autoip_handle_arp_conflict(): we are defending, but in DEFEND_INTERVAL, retreating\n"));
+
+      /* TODO: close all TCP sessions */
+      autoip_start(netif);
+    } else {
+      LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 1,
+        ("autoip_handle_arp_conflict(): we are defend, send ARP Announce\n"));
+      autoip_arp_announce(netif);
+      netif->autoip->lastconflict = DEFEND_INTERVAL * AUTOIP_TICKS_PER_SECOND;
+    }
+  } else {
+    LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 1,
+      ("autoip_handle_arp_conflict(): we do not defend, retreating\n"));
+    /* TODO: close all TCP sessions */
+    autoip_start(netif);
+  }
+}
+
+/**
+ * Create an IP-Address out of range 169.254.1.0 to 169.254.254.255
+ *
+ * @param netif network interface on which create the IP-Address
+ * @param IPAddr ip address to initialize
+ */
+static void
+autoip_create_addr(struct netif *netif, struct ip_addr *IPAddr)
+{
+  /* Here we create an IP-Address out of range 169.254.1.0 to 169.254.254.255
+   * compliant to RFC 3927 Section 2.1
+   * We have 254 * 256 possibilities */
+
+  u32_t addr = ntohl(LWIP_AUTOIP_CREATE_SEED_ADDR(netif));
+  addr += netif->autoip->tried_llipaddr;
+  addr = AUTOIP_NET | (addr & 0xffff);
+  /* Now, 169.254.0.0 <= addr <= 169.254.255.255 */ 
+
+  if (addr < AUTOIP_RANGE_START) {
+    addr += AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
+  }
+  if (addr > AUTOIP_RANGE_END) {
+    addr -= AUTOIP_RANGE_END - AUTOIP_RANGE_START + 1;
+  }
+  LWIP_ASSERT("AUTOIP address not in range", (addr >= AUTOIP_RANGE_START) &&
+	(addr <= AUTOIP_RANGE_END));
+  IPAddr->addr = htonl(addr);
+  
+  LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 1,
+    ("autoip_create_addr(): tried_llipaddr=%"U16_F", 0x%08"X32_F"\n",
+    (u16_t)(netif->autoip->tried_llipaddr), (u32_t)(IPAddr->addr)));
+}
+
+/**
+ * Sends an ARP announce from a network interface
+ *
+ * @param netif network interface used to send the announce
+ */
+static err_t
+autoip_arp_announce(struct netif *netif)
+{
+  return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast,
+    (struct eth_addr *)netif->hwaddr, &netif->autoip->llipaddr, &ethzero,
+    &netif->autoip->llipaddr, ARP_REQUEST);
+}
+
+/**
+ * Configure interface for use with current LL IP-Address
+ *
+ * @param netif network interface to configure with current LL IP-Address
+ */
+static err_t
+autoip_bind(struct netif *netif)
+{
+  struct autoip *autoip = netif->autoip;
+  struct ip_addr sn_mask, gw_addr;
+
+  LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | 3,
+    ("autoip_bind(netif=%p) %c%c%"U16_F" 0x%08"X32_F"\n",
+    (void*)netif, netif->name[0], netif->name[1], (u16_t)netif->num, autoip->llipaddr.addr));
+
+  IP4_ADDR(&sn_mask, 255, 255, 0, 0);
+  IP4_ADDR(&gw_addr, 0, 0, 0, 0);
+
+  netif_set_ipaddr(netif, &autoip->llipaddr);
+  netif_set_netmask(netif, &sn_mask);
+  netif_set_gw(netif, &gw_addr);  
+
+  /* bring the interface up */
+  netif_set_up(netif);
+
+  return ERR_OK;
+}
+
+/**
+ * Start AutoIP client
+ *
+ * @param netif network interface on which start the AutoIP client
+ */
+err_t
+autoip_start(struct netif *netif)
+{
+  struct autoip *autoip = netif->autoip;
+  err_t result = ERR_OK;
+
+  if(netif_is_up(netif)) {
+    netif_set_down(netif);
+  }
+
+  /* Set IP-Address, Netmask and Gateway to 0 to make sure that
+   * ARP Packets are formed correctly
+   */
+  netif->ip_addr.addr = 0;
+  netif->netmask.addr = 0;
+  netif->gw.addr      = 0;
+
+  LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
+    ("autoip_start(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0],
+    netif->name[1], (u16_t)netif->num));
+  if(autoip == NULL) {
+    /* no AutoIP client attached yet? */
+    LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
+      ("autoip_start(): starting new AUTOIP client\n"));
+    autoip = mem_malloc(sizeof(struct autoip));
+    if(autoip == NULL) {
+      LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
+        ("autoip_start(): could not allocate autoip\n"));
+      return ERR_MEM;
+    }
+    memset( autoip, 0, sizeof(struct autoip));
+    /* store this AutoIP client in the netif */
+    netif->autoip = autoip;
+    LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE, ("autoip_start(): allocated autoip"));
+  } else {
+    autoip->state = AUTOIP_STATE_OFF;
+    autoip->ttw = 0;
+    autoip->sent_num = 0;
+    memset(&autoip->llipaddr, 0, sizeof(struct ip_addr));
+    autoip->lastconflict = 0;
+  }
+
+  autoip_create_addr(netif, &(autoip->llipaddr));
+  autoip->tried_llipaddr++;
+  autoip->state = AUTOIP_STATE_PROBING;
+  autoip->sent_num = 0;
+
+  /* time to wait to first probe, this is randomly
+   * choosen out of 0 to PROBE_WAIT seconds.
+   * compliant to RFC 3927 Section 2.2.1
+   */
+  autoip->ttw = (u16_t)(LWIP_AUTOIP_RAND(netif) % (PROBE_WAIT * AUTOIP_TICKS_PER_SECOND));
+
+  /*
+   * if we tried more then MAX_CONFLICTS we must limit our rate for
+   * accquiring and probing address
+   * compliant to RFC 3927 Section 2.2.1
+   */
+
+  if(autoip->tried_llipaddr > MAX_CONFLICTS) {
+    autoip->ttw = RATE_LIMIT_INTERVAL * AUTOIP_TICKS_PER_SECOND;
+  }
+
+  return result;
+}
+
+/**
+ * Stop AutoIP client
+ *
+ * @param netif network interface on which stop the AutoIP client
+ */
+err_t
+autoip_stop(struct netif *netif)
+{
+  netif->autoip->state = AUTOIP_STATE_OFF;
+  netif_set_down(netif);
+  return ERR_OK;
+}
+
+/**
+ * Has to be called in loop every AUTOIP_TMR_INTERVAL milliseconds
+ */
+void
+autoip_tmr()
+{
+  struct netif *netif = netif_list;
+  /* loop through netif's */
+  while (netif != NULL) {
+    /* only act on AutoIP configured interfaces */
+    if (netif->autoip != NULL) {
+      if(netif->autoip->lastconflict > 0) {
+        netif->autoip->lastconflict--;
+      }
+
+      LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE,
+        ("autoip_tmr() AutoIP-State: %"U16_F", ttw=%"U16_F"\n",
+        (u16_t)(netif->autoip->state), netif->autoip->ttw));
+
+      switch(netif->autoip->state) {
+        case AUTOIP_STATE_PROBING:
+          if(netif->autoip->ttw > 0) {
+            netif->autoip->ttw--;
+          } else {
+            if(netif->autoip->sent_num == PROBE_NUM) {
+              netif->autoip->state = AUTOIP_STATE_ANNOUNCING;
+              netif->autoip->sent_num = 0;
+              netif->autoip->ttw = ANNOUNCE_WAIT * AUTOIP_TICKS_PER_SECOND;
+            } else {
+              etharp_request(netif, &(netif->autoip->llipaddr));
+              LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | 3,
+                ("autoip_tmr() PROBING Sent Probe\n"));
+              netif->autoip->sent_num++;
+              /* calculate time to wait to next probe */
+              netif->autoip->ttw = (u16_t)((LWIP_AUTOIP_RAND(netif) %
+                ((PROBE_MAX - PROBE_MIN) * AUTOIP_TICKS_PER_SECOND) ) +
+                PROBE_MIN * AUTOIP_TICKS_PER_SECOND);
+            }
+          }
+          break;
+
+        case AUTOIP_STATE_ANNOUNCING:
+          if(netif->autoip->ttw > 0) {
+            netif->autoip->ttw--;
+          } else {
+            if(netif->autoip->sent_num == 0) {
+             /* We are here the first time, so we waited ANNOUNCE_WAIT seconds
+              * Now we can bind to an IP address and use it
+              */
+              autoip_bind(netif);
+            }
+
+            if(netif->autoip->sent_num == ANNOUNCE_NUM) {
+              netif->autoip->state = AUTOIP_STATE_BOUND;
+              netif->autoip->sent_num = 0;
+              netif->autoip->ttw = 0;
+            } else {
+              autoip_arp_announce(netif);
+              LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | 3,
+                ("autoip_tmr() ANNOUNCING Sent Announce\n"));
+              netif->autoip->sent_num++;
+              netif->autoip->ttw = ANNOUNCE_INTERVAL * AUTOIP_TICKS_PER_SECOND;
+            }
+          }
+          break;
+      }
+    }
+    /* proceed to next network interface */
+    netif = netif->next;
+  }
+}
+
+/**
+ * Handles every incoming ARP Packet, called by etharp_arp_input.
+ *
+ * @param netif network interface to use for autoip processing
+ * @param hdr Incoming ARP packet
+ */
+void
+autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr)
+{
+  LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | 3, ("autoip_arp_reply()\n"));
+  if ((netif->autoip != NULL) && (netif->autoip->state != AUTOIP_STATE_OFF)) {
+   /* when ip.src == llipaddr && hw.src != netif->hwaddr
+    *
+    * when probing  ip.dst == llipaddr && hw.src != netif->hwaddr
+    * we have a conflict and must solve it
+    */
+    struct ip_addr sipaddr, dipaddr;
+    struct eth_addr netifaddr;
+    netifaddr.addr[0] = netif->hwaddr[0];
+    netifaddr.addr[1] = netif->hwaddr[1];
+    netifaddr.addr[2] = netif->hwaddr[2];
+    netifaddr.addr[3] = netif->hwaddr[3];
+    netifaddr.addr[4] = netif->hwaddr[4];
+    netifaddr.addr[5] = netif->hwaddr[5];
+
+    /* Copy struct ip_addr2 to aligned ip_addr, to support compilers without
+     * structure packing (not using structure copy which breaks strict-aliasing rules).
+     */
+    SMEMCPY(&sipaddr, &hdr->sipaddr, sizeof(sipaddr));
+    SMEMCPY(&dipaddr, &hdr->dipaddr, sizeof(dipaddr));
+      
+    if ((netif->autoip->state == AUTOIP_STATE_PROBING) ||
+        ((netif->autoip->state == AUTOIP_STATE_ANNOUNCING) &&
+         (netif->autoip->sent_num == 0))) {
+     /* RFC 3927 Section 2.2.1:
+      * from beginning to after ANNOUNCE_WAIT
+      * seconds we have a conflict if
+      * ip.src == llipaddr OR
+      * ip.dst == llipaddr && hw.src != own hwaddr
+      */
+      if ((ip_addr_cmp(&sipaddr, &netif->autoip->llipaddr)) ||
+          (ip_addr_cmp(&dipaddr, &netif->autoip->llipaddr) &&
+           !eth_addr_cmp(&netifaddr, &hdr->shwaddr))) {
+        LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 1,
+          ("autoip_arp_reply(): Probe Conflict detected\n"));
+        autoip_start(netif);
+      }
+    } else {
+     /* RFC 3927 Section 2.5:
+      * in any state we have a conflict if
+      * ip.src == llipaddr && hw.src != own hwaddr
+      */
+      if (ip_addr_cmp(&sipaddr, &netif->autoip->llipaddr) &&
+          !eth_addr_cmp(&netifaddr, &hdr->shwaddr)) {
+        LWIP_DEBUGF(AUTOIP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 1,
+          ("autoip_arp_reply(): Conflicting ARP-Packet detected\n"));
+        autoip_handle_arp_conflict(netif);
+      }
+    }
+  }
+}
+
+#endif /* LWIP_AUTOIP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/icmp.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/icmp.c
new file mode 100644
index 000000000..b97a587a7
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/icmp.c
@@ -0,0 +1,331 @@
+/**
+ * @file
+ * ICMP - Internet Control Message Protocol
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/* Some ICMP messages should be passed to the transport protocols. This
+   is not implemented. */
+
+#include "lwip/opt.h"
+
+#if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/icmp.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+#include "lwip/ip.h"
+#include "lwip/def.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+
+#include <string.h>
+
+/** Small optimization: set to 0 if incoming PBUF_POOL pbuf always can be
+ * used to modify and send a response packet (and to 1 if this is not the case,
+ * e.g. when link header is stripped of when receiving) */
+#ifndef LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
+#define LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN 1
+#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */
+
+/* The amount of data from the original packet to return in a dest-unreachable */
+#define ICMP_DEST_UNREACH_DATASIZE 8
+
+static void icmp_send_response(struct pbuf *p, u8_t type, u8_t code);
+
+/**
+ * Processes ICMP input packets, called from ip_input().
+ *
+ * Currently only processes icmp echo requests and sends
+ * out the echo response.
+ *
+ * @param p the icmp echo request packet, p->payload pointing to the ip header
+ * @param inp the netif on which this packet was received
+ */
+void
+icmp_input(struct pbuf *p, struct netif *inp)
+{
+  u8_t type;
+#ifdef LWIP_DEBUG
+  u8_t code;
+#endif /* LWIP_DEBUG */
+  struct icmp_echo_hdr *iecho;
+  struct ip_hdr *iphdr;
+  struct ip_addr tmpaddr;
+  s16_t hlen;
+
+  ICMP_STATS_INC(icmp.recv);
+  snmp_inc_icmpinmsgs();
+
+
+  iphdr = p->payload;
+  hlen = IPH_HL(iphdr) * 4;
+  if (pbuf_header(p, -hlen) || (p->tot_len < sizeof(u16_t)*2)) {
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: short ICMP (%"U16_F" bytes) received\n", p->tot_len));
+    goto lenerr;
+  }
+
+  type = *((u8_t *)p->payload);
+#ifdef LWIP_DEBUG
+  code = *(((u8_t *)p->payload)+1);
+#endif /* LWIP_DEBUG */
+  switch (type) {
+  case ICMP_ECHO:
+#if !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING
+    {
+      int accepted = 1;
+#if !LWIP_MULTICAST_PING
+      /* multicast destination address? */
+      if (ip_addr_ismulticast(&iphdr->dest)) {
+        accepted = 0;
+      }
+#endif /* LWIP_MULTICAST_PING */
+#if !LWIP_BROADCAST_PING
+      /* broadcast destination address? */
+      if (ip_addr_isbroadcast(&iphdr->dest, inp)) {
+        accepted = 0;
+      }
+#endif /* LWIP_BROADCAST_PING */
+      /* broadcast or multicast destination address not acceptd? */
+      if (!accepted) {
+        LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: Not echoing to multicast or broadcast pings\n"));
+        ICMP_STATS_INC(icmp.err);
+        pbuf_free(p);
+        return;
+      }
+    }
+#endif /* !LWIP_MULTICAST_PING || !LWIP_BROADCAST_PING */
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n"));
+    if (p->tot_len < sizeof(struct icmp_echo_hdr)) {
+      LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n"));
+      goto lenerr;
+    }
+    if (inet_chksum_pbuf(p) != 0) {
+      LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo\n"));
+      pbuf_free(p);
+      ICMP_STATS_INC(icmp.chkerr);
+      snmp_inc_icmpinerrors();
+      return;
+    }
+#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
+    if (pbuf_header(p, (PBUF_IP_HLEN + PBUF_LINK_HLEN))) {
+      /* p is not big enough to contain link headers
+       * allocate a new one and copy p into it
+       */
+      struct pbuf *r;
+      /* switch p->payload to ip header */
+      if (pbuf_header(p, hlen)) {
+        LWIP_ASSERT("icmp_input: moving p->payload to ip header failed\n", 0);
+        goto memerr;
+      }
+      /* allocate new packet buffer with space for link headers */
+      r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
+      if (r == NULL) {
+        LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: allocating new pbuf failed\n"));
+        goto memerr;
+      }
+      LWIP_ASSERT("check that first pbuf can hold struct the ICMP header",
+                  (r->len >= hlen + sizeof(struct icmp_echo_hdr)));
+      /* copy the whole packet including ip header */
+      if (pbuf_copy(r, p) != ERR_OK) {
+        LWIP_ASSERT("icmp_input: copying to new pbuf failed\n", 0);
+        goto memerr;
+      }
+      iphdr = r->payload;
+      /* switch r->payload back to icmp header */
+      if (pbuf_header(r, -hlen)) {
+        LWIP_ASSERT("icmp_input: restoring original p->payload failed\n", 0);
+        goto memerr;
+      }
+      /* free the original p */
+      pbuf_free(p);
+      /* we now have an identical copy of p that has room for link headers */
+      p = r;
+    } else {
+      /* restore p->payload to point to icmp header */
+      if (pbuf_header(p, -(s16_t)(PBUF_IP_HLEN + PBUF_LINK_HLEN))) {
+        LWIP_ASSERT("icmp_input: restoring original p->payload failed\n", 0);
+        goto memerr;
+      }
+    }
+#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */
+    /* At this point, all checks are OK. */
+    /* We generate an answer by switching the dest and src ip addresses,
+     * setting the icmp type to ECHO_RESPONSE and updating the checksum. */
+    iecho = p->payload;
+    tmpaddr.addr = iphdr->src.addr;
+    iphdr->src.addr = iphdr->dest.addr;
+    iphdr->dest.addr = tmpaddr.addr;
+    ICMPH_TYPE_SET(iecho, ICMP_ER);
+    /* adjust the checksum */
+    if (iecho->chksum >= htons(0xffff - (ICMP_ECHO << 8))) {
+      iecho->chksum += htons(ICMP_ECHO << 8) + 1;
+    } else {
+      iecho->chksum += htons(ICMP_ECHO << 8);
+    }
+
+    /* Set the correct TTL and recalculate the header checksum. */
+    IPH_TTL_SET(iphdr, ICMP_TTL);
+    IPH_CHKSUM_SET(iphdr, 0);
+#if CHECKSUM_GEN_IP
+    IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
+#endif /* CHECKSUM_GEN_IP */
+
+    ICMP_STATS_INC(icmp.xmit);
+    /* increase number of messages attempted to send */
+    snmp_inc_icmpoutmsgs();
+    /* increase number of echo replies attempted to send */
+    snmp_inc_icmpoutechoreps();
+
+    if(pbuf_header(p, hlen)) {
+      LWIP_ASSERT("Can't move over header in packet", 0);
+    } else {
+      err_t ret;
+      ret = ip_output_if(p, &(iphdr->src), IP_HDRINCL,
+                   ICMP_TTL, 0, IP_PROTO_ICMP, inp);
+      if (ret != ERR_OK) {
+        LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ip_output_if returned an error: %c.\n", ret));
+      }
+    }
+    break;
+  default:
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %"S16_F" code %"S16_F" not supported.\n", 
+                (s16_t)type, (s16_t)code));
+    ICMP_STATS_INC(icmp.proterr);
+    ICMP_STATS_INC(icmp.drop);
+  }
+  pbuf_free(p);
+  return;
+lenerr:
+  pbuf_free(p);
+  ICMP_STATS_INC(icmp.lenerr);
+  snmp_inc_icmpinerrors();
+  return;
+#if LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
+memerr:
+  pbuf_free(p);
+  ICMP_STATS_INC(icmp.err);
+  snmp_inc_icmpinerrors();
+  return;
+#endif /* LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN */
+}
+
+/**
+ * Send an icmp 'destination unreachable' packet, called from ip_input() if
+ * the transport layer protocol is unknown and from udp_input() if the local
+ * port is not bound.
+ *
+ * @param p the input packet for which the 'unreachable' should be sent,
+ *          p->payload pointing to the IP header
+ * @param t type of the 'unreachable' packet
+ */
+void
+icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
+{
+  icmp_send_response(p, ICMP_DUR, t);
+}
+
+#if IP_FORWARD || IP_REASSEMBLY
+/**
+ * Send a 'time exceeded' packet, called from ip_forward() if TTL is 0.
+ *
+ * @param p the input packet for which the 'time exceeded' should be sent,
+ *          p->payload pointing to the IP header
+ * @param t type of the 'time exceeded' packet
+ */
+void
+icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
+{
+  icmp_send_response(p, ICMP_TE, t);
+}
+
+#endif /* IP_FORWARD || IP_REASSEMBLY */
+
+/**
+ * Send an icmp packet in response to an incoming packet.
+ *
+ * @param p the input packet for which the 'unreachable' should be sent,
+ *          p->payload pointing to the IP header
+ * @param type Type of the ICMP header
+ * @param code Code of the ICMP header
+ */
+static void
+icmp_send_response(struct pbuf *p, u8_t type, u8_t code)
+{
+  struct pbuf *q;
+  struct ip_hdr *iphdr;
+  /* we can use the echo header here */
+  struct icmp_echo_hdr *icmphdr;
+
+  /* ICMP header + IP header + 8 bytes of data */
+  q = pbuf_alloc(PBUF_IP, sizeof(struct icmp_echo_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE,
+                 PBUF_RAM);
+  if (q == NULL) {
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded: failed to allocate pbuf for ICMP packet.\n"));
+    return;
+  }
+  LWIP_ASSERT("check that first pbuf can hold icmp message",
+             (q->len >= (sizeof(struct icmp_echo_hdr) + IP_HLEN + ICMP_DEST_UNREACH_DATASIZE)));
+
+  iphdr = p->payload;
+  LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded from "));
+  ip_addr_debug_print(ICMP_DEBUG, &(iphdr->src));
+  LWIP_DEBUGF(ICMP_DEBUG, (" to "));
+  ip_addr_debug_print(ICMP_DEBUG, &(iphdr->dest));
+  LWIP_DEBUGF(ICMP_DEBUG, ("\n"));
+
+  icmphdr = q->payload;
+  icmphdr->type = type;
+  icmphdr->code = code;
+  icmphdr->id = 0;
+  icmphdr->seqno = 0;
+
+  /* copy fields from original packet */
+  SMEMCPY((u8_t *)q->payload + sizeof(struct icmp_echo_hdr), (u8_t *)p->payload,
+          IP_HLEN + ICMP_DEST_UNREACH_DATASIZE);
+
+  /* calculate checksum */
+  icmphdr->chksum = 0;
+  icmphdr->chksum = inet_chksum(icmphdr, q->len);
+  ICMP_STATS_INC(icmp.xmit);
+  /* increase number of messages attempted to send */
+  snmp_inc_icmpoutmsgs();
+  /* increase number of destination unreachable messages attempted to send */
+  snmp_inc_icmpouttimeexcds();
+  ip_output(q, NULL, &(iphdr->src), ICMP_TTL, 0, IP_PROTO_ICMP);
+  pbuf_free(q);
+}
+
+#endif /* LWIP_ICMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/igmp.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/igmp.c
new file mode 100644
index 000000000..7c07bc465
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/igmp.c
@@ -0,0 +1,757 @@
+/**
+ * @file
+ * IGMP - Internet Group Management Protocol
+ *
+ */
+
+/*
+ * Copyright (c) 2002 CITEL Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * This file is a contribution to the lwIP TCP/IP stack.
+ * The Swedish Institute of Computer Science and Adam Dunkels
+ * are specifically granted permission to redistribute this
+ * source code.
+*/
+
+/*-------------------------------------------------------------
+Note 1)
+Although the rfc requires V1 AND V2 capability
+we will only support v2 since now V1 is very old (August 1989)
+V1 can be added if required
+
+a debug print and statistic have been implemented to
+show this up.
+-------------------------------------------------------------
+-------------------------------------------------------------
+Note 2)
+A query for a specific group address (as opposed to ALLHOSTS)
+has now been implemented as I am unsure if it is required
+
+a debug print and statistic have been implemented to
+show this up.
+-------------------------------------------------------------
+-------------------------------------------------------------
+Note 3)
+The router alert rfc 2113 is implemented in outgoing packets
+but not checked rigorously incoming
+-------------------------------------------------------------
+Steve Reynolds
+------------------------------------------------------------*/
+
+/*-----------------------------------------------------------------------------
+ * RFC 988  - Host extensions for IP multicasting                         - V0
+ * RFC 1054 - Host extensions for IP multicasting                         -
+ * RFC 1112 - Host extensions for IP multicasting                         - V1
+ * RFC 2236 - Internet Group Management Protocol, Version 2               - V2  <- this code is based on this RFC (it's the "de facto" standard)
+ * RFC 3376 - Internet Group Management Protocol, Version 3               - V3
+ * RFC 4604 - Using Internet Group Management Protocol Version 3...       - V3+
+ * RFC 2113 - IP Router Alert Option                                      - 
+ *----------------------------------------------------------------------------*/
+
+/*-----------------------------------------------------------------------------
+ * Includes
+ *----------------------------------------------------------------------------*/
+
+#include "lwip/opt.h"
+
+#if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/igmp.h"
+#include "lwip/debug.h"
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/ip.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+#include "lwip/netif.h"
+#include "lwip/icmp.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+#include "lwip/stats.h"
+
+#include "string.h"
+
+/*-----------------------------------------------------------------------------
+ * Globales
+ *----------------------------------------------------------------------------*/
+
+static struct igmp_group* igmp_group_list;
+static struct ip_addr     allsystems;
+static struct ip_addr     allrouters;
+
+/**
+ * Initialize the IGMP module
+ */
+void
+igmp_init(void)
+{
+  LWIP_DEBUGF(IGMP_DEBUG, ("igmp_init: initializing\n"));
+
+  IP4_ADDR(&allsystems, 224, 0, 0, 1);
+  IP4_ADDR(&allrouters, 224, 0, 0, 2);
+}
+
+#ifdef LWIP_DEBUG
+/**
+ * Dump global IGMP groups list
+ */
+void
+igmp_dump_group_list()
+{ 
+  struct igmp_group *group = igmp_group_list;
+
+  while (group != NULL) {
+    LWIP_DEBUGF(IGMP_DEBUG, ("igmp_dump_group_list: [%"U32_F"] ", (u32_t)(group->group_state)));
+    ip_addr_debug_print(IGMP_DEBUG, &group->group_address);
+    LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", group->interface));
+    group = group->next;
+  }
+  LWIP_DEBUGF(IGMP_DEBUG, ("\n"));
+}
+#else
+#define igmp_dump_group_list()
+#endif /* LWIP_DEBUG */
+
+/**
+ * Start IGMP processing on interface
+ *
+ * @param netif network interface on which start IGMP processing
+ */
+err_t
+igmp_start(struct netif *netif)
+{
+  struct igmp_group* group;
+
+  LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: starting IGMP processing on if %p\n", netif));
+
+  group = igmp_lookup_group(netif, &allsystems);
+
+  if (group != NULL) {
+    group->group_state = IGMP_GROUP_IDLE_MEMBER;
+    group->use++;
+
+    /* Allow the igmp messages at the MAC level */
+    if (netif->igmp_mac_filter != NULL) {
+      LWIP_DEBUGF(IGMP_DEBUG, ("igmp_start: igmp_mac_filter(ADD "));
+      ip_addr_debug_print(IGMP_DEBUG, &allsystems);
+      LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif));
+      netif->igmp_mac_filter( netif, &allsystems, IGMP_ADD_MAC_FILTER);
+    }
+
+    return ERR_OK;
+  }
+
+  return ERR_MEM;
+}
+
+/**
+ * Stop IGMP processing on interface
+ *
+ * @param netif network interface on which stop IGMP processing
+ */
+err_t
+igmp_stop(struct netif *netif)
+{
+  struct igmp_group *group = igmp_group_list;
+  struct igmp_group *prev  = NULL;
+  struct igmp_group *next;
+
+  /* look for groups joined on this interface further down the list */
+  while (group != NULL) {
+    next = group->next;
+    /* is it a group joined on this interface? */
+    if (group->interface == netif) {
+      /* is it the first group of the list? */
+      if (group == igmp_group_list) {
+        igmp_group_list = next;
+      }
+      /* is there a "previous" group defined? */
+      if (prev != NULL) {
+        prev->next = next;
+      }
+      /* disable the group at the MAC level */
+      if (netif->igmp_mac_filter != NULL) {
+        LWIP_DEBUGF(IGMP_DEBUG, ("igmp_stop: igmp_mac_filter(DEL "));
+        ip_addr_debug_print(IGMP_DEBUG, &group->group_address);
+        LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif));
+        netif->igmp_mac_filter(netif, &(group->group_address), IGMP_DEL_MAC_FILTER);
+      }
+      /* free group */
+      memp_free(MEMP_IGMP_GROUP, group);
+    } else {
+      /* change the "previous" */
+      prev = group;
+    }
+    /* move to "next" */
+    group = next;
+  }
+  return ERR_OK;
+}
+
+/**
+ * Report IGMP memberships for this interface
+ *
+ * @param netif network interface on which report IGMP memberships
+ */
+void
+igmp_report_groups( struct netif *netif)
+{
+  struct igmp_group *group = igmp_group_list;
+
+  LWIP_DEBUGF(IGMP_DEBUG, ("igmp_report_groups: sending IGMP reports on if %p\n", netif));
+
+  while (group != NULL) {
+    if (group->interface == netif) {
+      igmp_delaying_member( group, IGMP_JOIN_DELAYING_MEMBER_TMR);
+    }
+    group = group->next;
+  }
+}
+
+/**
+ * Search for a group in the global igmp_group_list
+ *
+ * @param ifp the network interface for which to look
+ * @param addr the group ip address to search for
+ * @return a struct igmp_group* if the group has been found,
+ *         NULL if the group wasn't found.
+ */
+struct igmp_group *
+igmp_lookfor_group(struct netif *ifp, struct ip_addr *addr)
+{
+  struct igmp_group *group = igmp_group_list;
+
+  while (group != NULL) {
+    if ((group->interface == ifp) && (ip_addr_cmp(&(group->group_address), addr))) {
+      return group;
+    }
+    group = group->next;
+  }
+
+  /* to be clearer, we return NULL here instead of
+   * 'group' (which is also NULL at this point).
+   */
+  return NULL;
+}
+
+/**
+ * Search for a specific igmp group and create a new one if not found-
+ *
+ * @param ifp the network interface for which to look
+ * @param addr the group ip address to search
+ * @return a struct igmp_group*,
+ *         NULL on memory error.
+ */
+struct igmp_group *
+igmp_lookup_group(struct netif *ifp, struct ip_addr *addr)
+{
+  struct igmp_group *group = igmp_group_list;
+  
+  /* Search if the group already exists */
+  group = igmp_lookfor_group(ifp, addr);
+  if (group != NULL) {
+    /* Group already exists. */
+    return group;
+  }
+
+  /* Group doesn't exist yet, create a new one */
+  group = memp_malloc(MEMP_IGMP_GROUP);
+  if (group != NULL) {
+    group->interface          = ifp;
+    ip_addr_set(&(group->group_address), addr);
+    group->timer              = 0; /* Not running */
+    group->group_state        = IGMP_GROUP_NON_MEMBER;
+    group->last_reporter_flag = 0;
+    group->use                = 0;
+    group->next               = igmp_group_list;
+    
+    igmp_group_list = group;
+  }
+
+  LWIP_DEBUGF(IGMP_DEBUG, ("igmp_lookup_group: %sallocated a new group with address ", (group?"":"impossible to ")));
+  ip_addr_debug_print(IGMP_DEBUG, addr);
+  LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", ifp));
+
+  return group;
+}
+
+/**
+ * Remove a group in the global igmp_group_list
+ *
+ * @param group the group to remove from the global igmp_group_list
+ * @return ERR_OK if group was removed from the list, an err_t otherwise
+ */
+err_t
+igmp_remove_group(struct igmp_group *group)
+{
+  err_t err = ERR_OK;
+
+  /* Is it the first group? */
+  if (igmp_group_list == group) {
+    igmp_group_list = group->next;
+  } else {
+    /* look for group further down the list */
+    struct igmp_group *tmpGroup;
+    for (tmpGroup = igmp_group_list; tmpGroup != NULL; tmpGroup = tmpGroup->next) {
+      if (tmpGroup->next == group) {
+        tmpGroup->next = group->next;
+        break;
+      }
+    }
+    /* Group not found in the global igmp_group_list */
+    if (tmpGroup == NULL)
+      err = ERR_ARG;
+  }
+  /* free group */
+  memp_free(MEMP_IGMP_GROUP, group);
+
+  return err;
+}
+
+/**
+ * Called from ip_input() if a new IGMP packet is received.
+ *
+ * @param p received igmp packet, p->payload pointing to the ip header
+ * @param inp network interface on which the packet was received
+ * @param dest destination ip address of the igmp packet
+ */
+void
+igmp_input(struct pbuf *p, struct netif *inp, struct ip_addr *dest)
+{
+  struct ip_hdr *    iphdr;
+  struct igmp_msg*   igmp;
+  struct igmp_group* group;
+  struct igmp_group* groupref;
+
+  /* Note that the length CAN be greater than 8 but only 8 are used - All are included in the checksum */    
+  iphdr = p->payload;
+  if (pbuf_header(p, -(s16_t)(IPH_HL(iphdr) * 4)) || (p->len < IGMP_MINLEN)) {
+    pbuf_free(p);
+    IGMP_STATS_INC(igmp.lenerr);
+    LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: length error\n"));
+    return;
+  }
+
+  LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: message from "));
+  ip_addr_debug_print(IGMP_DEBUG, &(iphdr->src));
+  LWIP_DEBUGF(IGMP_DEBUG, (" to address "));
+  ip_addr_debug_print(IGMP_DEBUG, &(iphdr->dest));
+  LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", inp));
+
+  /* Now calculate and check the checksum */
+  igmp = (struct igmp_msg *)p->payload;
+  if (inet_chksum(igmp, p->len)) {
+    pbuf_free(p);
+    IGMP_STATS_INC(igmp.chkerr);
+    LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: checksum error\n"));
+    return;
+  }
+
+  /* Packet is ok so find an existing group */
+  group = igmp_lookfor_group(inp, dest); /* use the incoming IP address! */
+  
+  /* If group can be found or create... */
+  if (!group) {
+    pbuf_free(p);
+    LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP frame not for us\n"));
+    return;
+  }
+
+  /* NOW ACT ON THE INCOMING MESSAGE TYPE... */
+  switch (igmp->igmp_msgtype) {
+   case IGMP_MEMB_QUERY: {
+     /* IGMP_MEMB_QUERY to the "all systems" address ? */
+     if ((ip_addr_cmp(dest, &allsystems)) && (igmp->igmp_group_address.addr == 0)) {
+       /* THIS IS THE GENERAL QUERY */
+       LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: General IGMP_MEMB_QUERY on \"ALL SYSTEMS\" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp)));
+
+       if (igmp->igmp_maxresp == 0) {
+         IGMP_STATS_INC(igmp.v1_rxed);
+         LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: got an all hosts query with time== 0 - this is V1 and not implemented - treat as v2\n"));
+         igmp->igmp_maxresp = IGMP_V1_DELAYING_MEMBER_TMR;
+       }
+
+       IGMP_STATS_INC(igmp.group_query_rxed);
+       groupref = igmp_group_list;
+       while (groupref) {
+         /* Do not send messages on the all systems group address! */
+         if ((groupref->interface == inp) && (!(ip_addr_cmp(&(groupref->group_address), &allsystems)))) {
+           igmp_delaying_member( groupref, igmp->igmp_maxresp);
+         }
+         groupref = groupref->next;
+       }
+     } else {
+       /* IGMP_MEMB_QUERY to a specific group ? */
+       if (group->group_address.addr != 0) {
+         LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_MEMB_QUERY to a specific group "));
+         ip_addr_debug_print(IGMP_DEBUG, &group->group_address);
+         if (ip_addr_cmp (dest, &allsystems)) {
+           LWIP_DEBUGF(IGMP_DEBUG, (" using \"ALL SYSTEMS\" address (224.0.0.1) [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp)));
+           /* we first need to re-lookfor the group since we used dest last time */
+           group = igmp_lookfor_group(inp, &igmp->igmp_group_address);
+         } else {
+           LWIP_DEBUGF(IGMP_DEBUG, (" with the group address as destination [igmp_maxresp=%i]\n", (int)(igmp->igmp_maxresp)));
+         }
+
+         if (group != NULL) {
+           IGMP_STATS_INC(igmp.unicast_query);
+           igmp_delaying_member( group, igmp->igmp_maxresp);
+         }
+       }
+     }
+     break;
+   }
+   case IGMP_V2_MEMB_REPORT: {
+     LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: IGMP_V2_MEMB_REPORT\n"));
+
+     IGMP_STATS_INC(igmp.report_rxed);
+     if (group->group_state == IGMP_GROUP_DELAYING_MEMBER) {
+       /* This is on a specific group we have already looked up */
+       group->timer = 0; /* stopped */
+       group->group_state = IGMP_GROUP_IDLE_MEMBER;
+       group->last_reporter_flag = 0;
+     }
+     break;
+   }
+   default: {
+     LWIP_DEBUGF(IGMP_DEBUG, ("igmp_input: unexpected msg %d in state %d on group %p on if %p\n",
+       igmp->igmp_msgtype, group->group_state, &group, group->interface));
+     break;
+   }
+  }
+
+  pbuf_free(p);
+  return;
+}
+
+/**
+ * Join a group on one network interface.
+ *
+ * @param ifaddr ip address of the network interface which should join a new group
+ * @param groupaddr the ip address of the group which to join
+ * @return ERR_OK if group was joined on the netif(s), an err_t otherwise
+ */
+err_t
+igmp_joingroup(struct ip_addr *ifaddr, struct ip_addr *groupaddr)
+{
+  err_t              err = ERR_VAL; /* no matching interface */
+  struct igmp_group *group;
+  struct netif      *netif;
+
+  /* make sure it is multicast address */
+  LWIP_ERROR("igmp_joingroup: attempt to join non-multicast address", ip_addr_ismulticast(groupaddr), return ERR_VAL;);
+  LWIP_ERROR("igmp_joingroup: attempt to join allsystems address", (!ip_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;);
+
+  /* loop through netif's */
+  netif = netif_list;
+  while (netif != NULL) {
+    /* Should we join this interface ? */
+    if ((netif->flags & NETIF_FLAG_IGMP) && ((ip_addr_isany(ifaddr) || ip_addr_cmp(&(netif->ip_addr), ifaddr)))) {
+      /* find group or create a new one if not found */
+      group = igmp_lookup_group(netif, groupaddr);
+
+      if (group != NULL) {
+        /* This should create a new group, check the state to make sure */
+        if (group->group_state != IGMP_GROUP_NON_MEMBER) {
+          LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: join to group not in state IGMP_GROUP_NON_MEMBER\n"));
+        } else {
+          /* OK - it was new group */
+          LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: join to new group: "));
+          ip_addr_debug_print(IGMP_DEBUG, groupaddr);
+          LWIP_DEBUGF(IGMP_DEBUG, ("\n"));
+
+          /* If first use of the group, allow the group at the MAC level */
+          if ((group->use==0) && (netif->igmp_mac_filter != NULL)) {
+            LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: igmp_mac_filter(ADD "));
+            ip_addr_debug_print(IGMP_DEBUG, groupaddr);
+            LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif));
+            netif->igmp_mac_filter(netif, groupaddr, IGMP_ADD_MAC_FILTER);
+          }
+
+          IGMP_STATS_INC(igmp.join_sent);
+          igmp_send(group, IGMP_V2_MEMB_REPORT);
+
+          igmp_start_timer(group, IGMP_JOIN_DELAYING_MEMBER_TMR);
+
+          /* Need to work out where this timer comes from */
+          group->group_state = IGMP_GROUP_DELAYING_MEMBER;
+        }
+        /* Increment group use */
+        group->use++;
+        /* Join on this interface */
+        err = ERR_OK;
+      } else {
+        /* Return an error even if some network interfaces are joined */
+        /** @todo undo any other netif already joined */
+        LWIP_DEBUGF(IGMP_DEBUG, ("igmp_joingroup: Not enought memory to join to group\n"));
+        return ERR_MEM;
+      }
+    }
+    /* proceed to next network interface */
+    netif = netif->next;
+  }
+
+  return err;
+}
+
+/**
+ * Leave a group on one network interface.
+ *
+ * @param ifaddr ip address of the network interface which should leave a group
+ * @param groupaddr the ip address of the group which to leave
+ * @return ERR_OK if group was left on the netif(s), an err_t otherwise
+ */
+err_t
+igmp_leavegroup(struct ip_addr *ifaddr, struct ip_addr *groupaddr)
+{
+  err_t              err = ERR_VAL; /* no matching interface */
+  struct igmp_group *group;
+  struct netif      *netif;
+
+  /* make sure it is multicast address */
+  LWIP_ERROR("igmp_leavegroup: attempt to leave non-multicast address", ip_addr_ismulticast(groupaddr), return ERR_VAL;);
+  LWIP_ERROR("igmp_leavegroup: attempt to leave allsystems address", (!ip_addr_cmp(groupaddr, &allsystems)), return ERR_VAL;);
+
+  /* loop through netif's */
+  netif = netif_list;
+  while (netif != NULL) {
+    /* Should we leave this interface ? */
+    if ((netif->flags & NETIF_FLAG_IGMP) && ((ip_addr_isany(ifaddr) || ip_addr_cmp(&(netif->ip_addr), ifaddr)))) {
+      /* find group */
+      group = igmp_lookfor_group(netif, groupaddr);
+
+      if (group != NULL) {
+        /* Only send a leave if the flag is set according to the state diagram */
+        LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: Leaving group: "));
+        ip_addr_debug_print(IGMP_DEBUG, groupaddr);
+        LWIP_DEBUGF(IGMP_DEBUG, ("\n"));
+
+        /* If there is no other use of the group */
+        if (group->use <= 1) {
+          /* If we are the last reporter for this group */
+          if (group->last_reporter_flag) {
+            LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: sending leaving group\n"));
+            IGMP_STATS_INC(igmp.leave_sent);
+            igmp_send(group, IGMP_LEAVE_GROUP);
+          }
+          
+          /* Disable the group at the MAC level */
+          if (netif->igmp_mac_filter != NULL) {
+            LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: igmp_mac_filter(DEL "));
+            ip_addr_debug_print(IGMP_DEBUG, groupaddr);
+            LWIP_DEBUGF(IGMP_DEBUG, (") on if %p\n", netif));
+            netif->igmp_mac_filter(netif, groupaddr, IGMP_DEL_MAC_FILTER);
+          }
+          
+          LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: remove group: "));
+          ip_addr_debug_print(IGMP_DEBUG, groupaddr);
+          LWIP_DEBUGF(IGMP_DEBUG, ("\n"));          
+          
+          /* Free the group */
+          igmp_remove_group(group);
+        } else {
+          /* Decrement group use */
+          group->use--;
+        }
+        /* Leave on this interface */
+        err = ERR_OK;
+      } else {
+        /* It's not a fatal error on "leavegroup" */
+        LWIP_DEBUGF(IGMP_DEBUG, ("igmp_leavegroup: not member of group\n"));
+      }
+    }
+    /* proceed to next network interface */
+    netif = netif->next;
+  }
+
+  return err;
+}
+
+/**
+ * The igmp timer function (both for NO_SYS=1 and =0)
+ * Should be called every IGMP_TMR_INTERVAL milliseconds (100 ms is default).
+ */
+void
+igmp_tmr(void)
+{
+  struct igmp_group *group = igmp_group_list;
+
+  while (group != NULL) {
+    if (group->timer != 0) {
+      group->timer -= 1;
+      if (group->timer == 0) {
+        igmp_timeout(group);
+      }
+    }
+    group = group->next;
+  }
+}
+
+/**
+ * Called if a timeout for one group is reached.
+ * Sends a report for this group.
+ *
+ * @param group an igmp_group for which a timeout is reached
+ */
+void
+igmp_timeout(struct igmp_group *group)
+{
+  /* If the state is IGMP_GROUP_DELAYING_MEMBER then we send a report for this group */
+  if (group->group_state == IGMP_GROUP_DELAYING_MEMBER) {
+    LWIP_DEBUGF(IGMP_DEBUG, ("igmp_timeout: report membership for group with address "));
+    ip_addr_debug_print(IGMP_DEBUG, &(group->group_address));
+    LWIP_DEBUGF(IGMP_DEBUG, (" on if %p\n", group->interface));
+
+    igmp_send(group, IGMP_V2_MEMB_REPORT);
+  }
+}
+
+/**
+ * Start a timer for an igmp group
+ *
+ * @param group the igmp_group for which to start a timer
+ * @param max_time the time in multiples of IGMP_TMR_INTERVAL (decrease with
+ *        every call to igmp_tmr())
+ */
+void
+igmp_start_timer(struct igmp_group *group, u8_t max_time)
+{
+  /**
+   * @todo Important !! this should be random 0 -> max_time. Find out how to do this
+   */
+  group->timer = max_time;
+}
+
+/**
+ * Stop a timer for an igmp_group
+ *
+ * @param group the igmp_group for which to stop the timer
+ */
+void
+igmp_stop_timer(struct igmp_group *group)
+{
+  group->timer = 0;
+}
+
+/**
+ * Delaying membership report for a group if necessary
+ *
+ * @param group the igmp_group for which "delaying" membership report
+ * @param maxresp query delay
+ */
+void
+igmp_delaying_member( struct igmp_group *group, u8_t maxresp)
+{
+  if ((group->group_state == IGMP_GROUP_IDLE_MEMBER) ||
+     ((group->group_state == IGMP_GROUP_DELAYING_MEMBER) && (maxresp > group->timer))) {
+    igmp_start_timer(group, (maxresp)/2);
+    group->group_state = IGMP_GROUP_DELAYING_MEMBER;
+  }
+}
+
+
+/**
+ * Sends an IP packet on a network interface. This function constructs the IP header
+ * and calculates the IP header checksum. If the source IP address is NULL,
+ * the IP address of the outgoing network interface is filled in as source address.
+ *
+ * @param p the packet to send (p->payload points to the data, e.g. next
+            protocol header; if dest == IP_HDRINCL, p already includes an IP
+            header and p->payload points to that IP header)
+ * @param src the source IP address to send from (if src == IP_ADDR_ANY, the
+ *         IP  address of the netif used to send is used as source address)
+ * @param dest the destination IP address to send the packet to
+ * @param ttl the TTL value to be set in the IP header
+ * @param proto the PROTOCOL to be set in the IP header
+ * @param netif the netif on which to send this packet
+ * @return ERR_OK if the packet was sent OK
+ *         ERR_BUF if p doesn't have enough space for IP/LINK headers
+ *         returns errors returned by netif->output
+ */
+err_t
+igmp_ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+                  u8_t ttl, u8_t proto, struct netif *netif)
+{
+  /* This is the "router alert" option */
+  u16_t ra[2];
+  ra[0] = htons (ROUTER_ALERT);
+  ra[1] = 0x0000; /* Router shall examine packet */
+  return ip_output_if_opt(p, src, dest, ttl, 0, proto, netif, ra, ROUTER_ALERTLEN);
+}
+
+/**
+ * Send an igmp packet to a specific group.
+ *
+ * @param group the group to which to send the packet
+ * @param type the type of igmp packet to send
+ */
+void
+igmp_send(struct igmp_group *group, u8_t type)
+{
+  struct pbuf*     p    = NULL;
+  struct igmp_msg* igmp = NULL;
+  struct ip_addr   src  = {0};
+  struct ip_addr*  dest = NULL;
+
+  /* IP header + "router alert" option + IGMP header */
+  p = pbuf_alloc(PBUF_TRANSPORT, IGMP_MINLEN, PBUF_RAM);
+  
+  if (p) {
+    igmp = p->payload;
+    LWIP_ASSERT("igmp_send: check that first pbuf can hold struct igmp_msg",
+               (p->len >= sizeof(struct igmp_msg)));
+    ip_addr_set(&src, &((group->interface)->ip_addr));
+     
+    if (type == IGMP_V2_MEMB_REPORT) {
+      dest = &(group->group_address);
+      IGMP_STATS_INC(igmp.report_sent);
+      ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
+      group->last_reporter_flag = 1; /* Remember we were the last to report */
+    } else {
+      if (type == IGMP_LEAVE_GROUP) {
+        dest = &allrouters;
+        ip_addr_set(&(igmp->igmp_group_address), &(group->group_address));
+      }
+    }
+
+    if ((type == IGMP_V2_MEMB_REPORT) || (type == IGMP_LEAVE_GROUP)) {
+      igmp->igmp_msgtype  = type;
+      igmp->igmp_maxresp  = 0;
+      igmp->igmp_checksum = 0;
+      igmp->igmp_checksum = inet_chksum( igmp, IGMP_MINLEN);
+
+      igmp_ip_output_if(p, &src, dest, IGMP_TTL, IP_PROTO_IGMP, group->interface);
+    }
+
+    pbuf_free(p);
+  } else {
+    LWIP_DEBUGF(IGMP_DEBUG, ("igmp_send: not enough memory for igmp_send\n"));
+  }
+}
+
+#endif /* LWIP_IGMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/inet.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/inet.c
new file mode 100644
index 000000000..69baf1d50
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/inet.c
@@ -0,0 +1,278 @@
+/**
+ * @file
+ * Functions common to all TCP/IPv4 modules, such as the byte order functions.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/inet.h"
+
+/* Here for now until needed in other places in lwIP */
+#ifndef isprint
+#define in_range(c, lo, up)  ((u8_t)c >= lo && (u8_t)c <= up)
+#define isprint(c)           in_range(c, 0x20, 0x7f)
+#define isdigit(c)           in_range(c, '0', '9')
+#define isxdigit(c)          (isdigit(c) || in_range(c, 'a', 'f') || in_range(c, 'A', 'F'))
+#define islower(c)           in_range(c, 'a', 'z')
+#define isspace(c)           (c == ' ' || c == '\f' || c == '\n' || c == '\r' || c == '\t' || c == '\v')
+#endif    
+    
+/**
+ * Ascii internet address interpretation routine.
+ * The value returned is in network order.
+ *
+ * @param cp IP address in ascii represenation (e.g. "127.0.0.1")
+ * @return ip address in network order
+ */
+u32_t
+inet_addr(const char *cp)
+{
+  struct in_addr val;
+
+  if (inet_aton(cp, &val)) {
+    return (val.s_addr);
+  }
+  return (INADDR_NONE);
+}
+
+/**
+ * Check whether "cp" is a valid ascii representation
+ * of an Internet address and convert to a binary address.
+ * Returns 1 if the address is valid, 0 if not.
+ * This replaces inet_addr, the return value from which
+ * cannot distinguish between failure and a local broadcast address.
+ *
+ * @param cp IP address in ascii represenation (e.g. "127.0.0.1")
+ * @param addr pointer to which to save the ip address in network order
+ * @return 1 if cp could be converted to addr, 0 on failure
+ */
+int
+inet_aton(const char *cp, struct in_addr *addr)
+{
+  u32_t val;
+  u8_t base;
+  char c;
+  u32_t parts[4];
+  u32_t *pp = parts;
+
+  c = *cp;
+  for (;;) {
+    /*
+     * Collect number up to ``.''.
+     * Values are specified as for C:
+     * 0x=hex, 0=octal, 1-9=decimal.
+     */
+    if (!isdigit(c))
+      return (0);
+    val = 0;
+    base = 10;
+    if (c == '0') {
+      c = *++cp;
+      if (c == 'x' || c == 'X') {
+        base = 16;
+        c = *++cp;
+      } else
+        base = 8;
+    }
+    for (;;) {
+      if (isdigit(c)) {
+        val = (val * base) + (int)(c - '0');
+        c = *++cp;
+      } else if (base == 16 && isxdigit(c)) {
+        val = (val << 4) | (int)(c + 10 - (islower(c) ? 'a' : 'A'));
+        c = *++cp;
+      } else
+        break;
+    }
+    if (c == '.') {
+      /*
+       * Internet format:
+       *  a.b.c.d
+       *  a.b.c   (with c treated as 16 bits)
+       *  a.b (with b treated as 24 bits)
+       */
+      if (pp >= parts + 3)
+        return (0);
+      *pp++ = val;
+      c = *++cp;
+    } else
+      break;
+  }
+  /*
+   * Check for trailing characters.
+   */
+  if (c != '\0' && !isspace(c))
+    return (0);
+  /*
+   * Concoct the address according to
+   * the number of parts specified.
+   */
+  switch (pp - parts + 1) {
+
+  case 0:
+    return (0);       /* initial nondigit */
+
+  case 1:             /* a -- 32 bits */
+    break;
+
+  case 2:             /* a.b -- 8.24 bits */
+    if (val > 0xffffffUL)
+      return (0);
+    val |= parts[0] << 24;
+    break;
+
+  case 3:             /* a.b.c -- 8.8.16 bits */
+    if (val > 0xffff)
+      return (0);
+    val |= (parts[0] << 24) | (parts[1] << 16);
+    break;
+
+  case 4:             /* a.b.c.d -- 8.8.8.8 bits */
+    if (val > 0xff)
+      return (0);
+    val |= (parts[0] << 24) | (parts[1] << 16) | (parts[2] << 8);
+    break;
+  }
+  if (addr)
+    addr->s_addr = htonl(val);
+  return (1);
+}
+
+/**
+ * Convert numeric IP address into decimal dotted ASCII representation.
+ * returns ptr to static buffer; not reentrant!
+ *
+ * @param addr ip address in network order to convert
+ * @return pointer to a global static (!) buffer that holds the ASCII
+ *         represenation of addr
+ */
+char *
+inet_ntoa(struct in_addr addr)
+{
+  static char str[16];
+  u32_t s_addr = addr.s_addr;
+  char inv[3];
+  char *rp;
+  u8_t *ap;
+  u8_t rem;
+  u8_t n;
+  u8_t i;
+
+  rp = str;
+  ap = (u8_t *)&s_addr;
+  for(n = 0; n < 4; n++) {
+    i = 0;
+    do {
+      rem = *ap % (u8_t)10;
+      *ap /= (u8_t)10;
+      inv[i++] = '0' + rem;
+    } while(*ap);
+    while(i--)
+      *rp++ = inv[i];
+    *rp++ = '.';
+    ap++;
+  }
+  *--rp = 0;
+  return str;
+}
+
+/**
+ * These are reference implementations of the byte swapping functions.
+ * Again with the aim of being simple, correct and fully portable.
+ * Byte swapping is the second thing you would want to optimize. You will
+ * need to port it to your architecture and in your cc.h:
+ * 
+ * #define LWIP_PLATFORM_BYTESWAP 1
+ * #define LWIP_PLATFORM_HTONS(x) <your_htons>
+ * #define LWIP_PLATFORM_HTONL(x) <your_htonl>
+ *
+ * Note ntohs() and ntohl() are merely references to the htonx counterparts.
+ */
+
+#if (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN)
+
+/**
+ * Convert an u16_t from host- to network byte order.
+ *
+ * @param n u16_t in host byte order
+ * @return n in network byte order
+ */
+u16_t
+htons(u16_t n)
+{
+  return ((n & 0xff) << 8) | ((n & 0xff00) >> 8);
+}
+
+/**
+ * Convert an u16_t from network- to host byte order.
+ *
+ * @param n u16_t in network byte order
+ * @return n in host byte order
+ */
+u16_t
+ntohs(u16_t n)
+{
+  return htons(n);
+}
+
+/**
+ * Convert an u32_t from host- to network byte order.
+ *
+ * @param n u32_t in host byte order
+ * @return n in network byte order
+ */
+u32_t
+htonl(u32_t n)
+{
+  return ((n & 0xff) << 24) |
+    ((n & 0xff00) << 8) |
+    ((n & 0xff0000UL) >> 8) |
+    ((n & 0xff000000UL) >> 24);
+}
+
+/**
+ * Convert an u32_t from network- to host byte order.
+ *
+ * @param n u32_t in network byte order
+ * @return n in host byte order
+ */
+u32_t
+ntohl(u32_t n)
+{
+  return htonl(n);
+}
+
+#endif /* (LWIP_PLATFORM_BYTESWAP == 0) && (BYTE_ORDER == LITTLE_ENDIAN) */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/inet_chksum.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/inet_chksum.c
new file mode 100644
index 000000000..185881efd
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/inet_chksum.c
@@ -0,0 +1,438 @@
+/**
+ * @file
+ * Incluse internet checksum functions.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/inet_chksum.h"
+#include "lwip/inet.h"
+
+#include <stddef.h>
+
+/* These are some reference implementations of the checksum algorithm, with the
+ * aim of being simple, correct and fully portable. Checksumming is the
+ * first thing you would want to optimize for your platform. If you create
+ * your own version, link it in and in your cc.h put:
+ * 
+ * #define LWIP_CHKSUM <your_checksum_routine> 
+ *
+ * Or you can select from the implementations below by defining
+ * LWIP_CHKSUM_ALGORITHM to 1, 2 or 3.
+ */
+
+#ifndef LWIP_CHKSUM
+# define LWIP_CHKSUM lwip_standard_chksum
+# ifndef LWIP_CHKSUM_ALGORITHM
+#  define LWIP_CHKSUM_ALGORITHM 1
+# endif
+#endif
+/* If none set: */
+#ifndef LWIP_CHKSUM_ALGORITHM
+# define LWIP_CHKSUM_ALGORITHM 0
+#endif
+
+/** Like the name says... */
+#if LWIP_PLATFORM_BYTESWAP && (BYTE_ORDER == LITTLE_ENDIAN)
+/* little endian and PLATFORM_BYTESWAP defined */
+#define SWAP_BYTES_IN_WORD(w) LWIP_PLATFORM_HTONS(w)
+#else
+/* can't use htons on big endian (or PLATFORM_BYTESWAP not defined)... */
+#define SWAP_BYTES_IN_WORD(w) ((w & 0xff) << 8) | ((w & 0xff00) >> 8)
+#endif
+
+/** Split an u32_t in two u16_ts and add them up */
+#define FOLD_U32T(u)          ((u >> 16) + (u & 0x0000ffffUL))
+
+#if (LWIP_CHKSUM_ALGORITHM == 1) /* Version #1 */
+/**
+ * lwip checksum
+ *
+ * @param dataptr points to start of data to be summed at any boundary
+ * @param len length of data to be summed
+ * @return host order (!) lwip checksum (non-inverted Internet sum) 
+ *
+ * @note accumulator size limits summable length to 64k
+ * @note host endianess is irrelevant (p3 RFC1071)
+ */
+static u16_t
+lwip_standard_chksum(void *dataptr, u16_t len)
+{
+  u32_t acc;
+  u16_t src;
+  u8_t *octetptr;
+
+  acc = 0;
+  /* dataptr may be at odd or even addresses */
+  octetptr = (u8_t*)dataptr;
+  while (len > 1) {
+    /* declare first octet as most significant
+       thus assume network order, ignoring host order */
+    src = (*octetptr) << 8;
+    octetptr++;
+    /* declare second octet as least significant */
+    src |= (*octetptr);
+    octetptr++;
+    acc += src;
+    len -= 2;
+  }
+  if (len > 0) {
+    /* accumulate remaining octet */
+    src = (*octetptr) << 8;
+    acc += src;
+  }
+  /* add deferred carry bits */
+  acc = (acc >> 16) + (acc & 0x0000ffffUL);
+  if ((acc & 0xffff0000UL) != 0) {
+    acc = (acc >> 16) + (acc & 0x0000ffffUL);
+  }
+  /* This maybe a little confusing: reorder sum using htons()
+     instead of ntohs() since it has a little less call overhead.
+     The caller must invert bits for Internet sum ! */
+  return htons((u16_t)acc);
+}
+#endif
+
+#if (LWIP_CHKSUM_ALGORITHM == 2) /* Alternative version #2 */
+/*
+ * Curt McDowell
+ * Broadcom Corp.
+ * csm@broadcom.com
+ *
+ * IP checksum two bytes at a time with support for
+ * unaligned buffer.
+ * Works for len up to and including 0x20000.
+ * by Curt McDowell, Broadcom Corp. 12/08/2005
+ *
+ * @param dataptr points to start of data to be summed at any boundary
+ * @param len length of data to be summed
+ * @return host order (!) lwip checksum (non-inverted Internet sum) 
+ */
+
+static u16_t
+lwip_standard_chksum(void *dataptr, int len)
+{
+  u8_t *pb = dataptr;
+  u16_t *ps, t = 0;
+  u32_t sum = 0;
+  int odd = ((u32_t)pb & 1);
+
+  /* Get aligned to u16_t */
+  if (odd && len > 0) {
+    ((u8_t *)&t)[1] = *pb++;
+    len--;
+  }
+
+  /* Add the bulk of the data */
+  ps = (u16_t *)pb;
+  while (len > 1) {
+    sum += *ps++;
+    len -= 2;
+  }
+
+  /* Consume left-over byte, if any */
+  if (len > 0) {
+    ((u8_t *)&t)[0] = *(u8_t *)ps;;
+  }
+
+  /* Add end bytes */
+  sum += t;
+
+  /* Fold 32-bit sum to 16 bits
+     calling this twice is propably faster than if statements... */
+  sum = FOLD_U32T(sum);
+  sum = FOLD_U32T(sum);
+
+  /* Swap if alignment was odd */
+  if (odd) {
+    sum = SWAP_BYTES_IN_WORD(sum);
+  }
+
+  return sum;
+}
+#endif
+
+#if (LWIP_CHKSUM_ALGORITHM == 3) /* Alternative version #3 */
+/**
+ * An optimized checksum routine. Basically, it uses loop-unrolling on
+ * the checksum loop, treating the head and tail bytes specially, whereas
+ * the inner loop acts on 8 bytes at a time. 
+ *
+ * @arg start of buffer to be checksummed. May be an odd byte address.
+ * @len number of bytes in the buffer to be checksummed.
+ * @return host order (!) lwip checksum (non-inverted Internet sum) 
+ * 
+ * by Curt McDowell, Broadcom Corp. December 8th, 2005
+ */
+
+static u16_t
+lwip_standard_chksum(void *dataptr, int len)
+{
+  u8_t *pb = dataptr;
+  u16_t *ps, t = 0;
+  u32_t *pl;
+  u32_t sum = 0, tmp;
+  /* starts at odd byte address? */
+  int odd = ((u32_t)pb & 1);
+
+  if (odd && len > 0) {
+    ((u8_t *)&t)[1] = *pb++;
+    len--;
+  }
+
+  ps = (u16_t *)pb;
+
+  if (((u32_t)ps & 3) && len > 1) {
+    sum += *ps++;
+    len -= 2;
+  }
+
+  pl = (u32_t *)ps;
+
+  while (len > 7)  {
+    tmp = sum + *pl++;          /* ping */
+    if (tmp < sum) {
+      tmp++;                    /* add back carry */
+    }
+
+    sum = tmp + *pl++;          /* pong */
+    if (sum < tmp) {
+      sum++;                    /* add back carry */
+    }
+
+    len -= 8;
+  }
+
+  /* make room in upper bits */
+  sum = FOLD_U32T(sum);
+
+  ps = (u16_t *)pl;
+
+  /* 16-bit aligned word remaining? */
+  while (len > 1) {
+    sum += *ps++;
+    len -= 2;
+  }
+
+  /* dangling tail byte remaining? */
+  if (len > 0) {                /* include odd byte */
+    ((u8_t *)&t)[0] = *(u8_t *)ps;
+  }
+
+  sum += t;                     /* add end bytes */
+
+  /* Fold 32-bit sum to 16 bits
+     calling this twice is propably faster than if statements... */
+  sum = FOLD_U32T(sum);
+  sum = FOLD_U32T(sum);
+
+  if (odd) {
+    sum = SWAP_BYTES_IN_WORD(sum);
+  }
+
+  return sum;
+}
+#endif
+
+/* inet_chksum_pseudo:
+ *
+ * Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
+ * IP addresses are expected to be in network byte order.
+ *
+ * @param p chain of pbufs over that a checksum should be calculated (ip data part)
+ * @param src source ip address (used for checksum of pseudo header)
+ * @param dst destination ip address (used for checksum of pseudo header)
+ * @param proto ip protocol (used for checksum of pseudo header)
+ * @param proto_len length of the ip data part (used for checksum of pseudo header)
+ * @return checksum (as u16_t) to be saved directly in the protocol header
+ */
+u16_t
+inet_chksum_pseudo(struct pbuf *p,
+       struct ip_addr *src, struct ip_addr *dest,
+       u8_t proto, u16_t proto_len)
+{
+  u32_t acc;
+  struct pbuf *q;
+  u8_t swapped;
+
+  acc = 0;
+  swapped = 0;
+  /* iterate through all pbuf in chain */
+  for(q = p; q != NULL; q = q->next) {
+    LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n",
+      (void *)q, (void *)q->next));
+    acc += LWIP_CHKSUM(q->payload, q->len);
+    /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/
+    /* just executing this next line is probably faster that the if statement needed
+       to check whether we really need to execute it, and does no harm */
+    acc = FOLD_U32T(acc);
+    if (q->len % 2 != 0) {
+      swapped = 1 - swapped;
+      acc = SWAP_BYTES_IN_WORD(acc);
+    }
+    /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/
+  }
+
+  if (swapped) {
+    acc = SWAP_BYTES_IN_WORD(acc);
+  }
+  acc += (src->addr & 0xffffUL);
+  acc += ((src->addr >> 16) & 0xffffUL);
+  acc += (dest->addr & 0xffffUL);
+  acc += ((dest->addr >> 16) & 0xffffUL);
+  acc += (u32_t)htons((u16_t)proto);
+  acc += (u32_t)htons(proto_len);
+
+  /* Fold 32-bit sum to 16 bits
+     calling this twice is propably faster than if statements... */
+  acc = FOLD_U32T(acc);
+  acc = FOLD_U32T(acc);
+  LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc));
+  return (u16_t)~(acc & 0xffffUL);
+}
+
+/* inet_chksum_pseudo:
+ *
+ * Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
+ * IP addresses are expected to be in network byte order.
+ *
+ * @param p chain of pbufs over that a checksum should be calculated (ip data part)
+ * @param src source ip address (used for checksum of pseudo header)
+ * @param dst destination ip address (used for checksum of pseudo header)
+ * @param proto ip protocol (used for checksum of pseudo header)
+ * @param proto_len length of the ip data part (used for checksum of pseudo header)
+ * @return checksum (as u16_t) to be saved directly in the protocol header
+ */
+/* Currently only used by UDPLITE, although this could change in the future. */
+#if LWIP_UDPLITE
+u16_t
+inet_chksum_pseudo_partial(struct pbuf *p,
+       struct ip_addr *src, struct ip_addr *dest,
+       u8_t proto, u16_t proto_len, u16_t chksum_len)
+{
+  u32_t acc;
+  struct pbuf *q;
+  u8_t swapped;
+  u16_t chklen;
+
+  acc = 0;
+  swapped = 0;
+  /* iterate through all pbuf in chain */
+  for(q = p; (q != NULL) && (chksum_len > 0); q = q->next) {
+    LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): checksumming pbuf %p (has next %p) \n",
+      (void *)q, (void *)q->next));
+    chklen = q->len;
+    if (chklen > chksum_len) {
+      chklen = chksum_len;
+    }
+    acc += LWIP_CHKSUM(q->payload, chklen);
+    chksum_len -= chklen;
+    LWIP_ASSERT("delete me", chksum_len < 0x7fff);
+    /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped lwip_chksum()=%"X32_F" \n", acc));*/
+    /* fold the upper bit down */
+    acc = FOLD_U32T(acc);
+    if (q->len % 2 != 0) {
+      swapped = 1 - swapped;
+      acc = SWAP_BYTES_IN_WORD(acc);
+    }
+    /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped lwip_chksum()=%"X32_F" \n", acc));*/
+  }
+
+  if (swapped) {
+    acc = SWAP_BYTES_IN_WORD(acc);
+  }
+  acc += (src->addr & 0xffffUL);
+  acc += ((src->addr >> 16) & 0xffffUL);
+  acc += (dest->addr & 0xffffUL);
+  acc += ((dest->addr >> 16) & 0xffffUL);
+  acc += (u32_t)htons((u16_t)proto);
+  acc += (u32_t)htons(proto_len);
+
+  /* Fold 32-bit sum to 16 bits
+     calling this twice is propably faster than if statements... */
+  acc = FOLD_U32T(acc);
+  acc = FOLD_U32T(acc);
+  LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain lwip_chksum()=%"X32_F"\n", acc));
+  return (u16_t)~(acc & 0xffffUL);
+}
+#endif /* LWIP_UDPLITE */
+
+/* inet_chksum:
+ *
+ * Calculates the Internet checksum over a portion of memory. Used primarily for IP
+ * and ICMP.
+ *
+ * @param dataptr start of the buffer to calculate the checksum (no alignment needed)
+ * @param len length of the buffer to calculate the checksum
+ * @return checksum (as u16_t) to be saved directly in the protocol header
+ */
+
+u16_t
+inet_chksum(void *dataptr, u16_t len)
+{
+  return ~LWIP_CHKSUM(dataptr, len);
+}
+
+/**
+ * Calculate a checksum over a chain of pbufs (without pseudo-header, much like
+ * inet_chksum only pbufs are used).
+ *
+ * @param p pbuf chain over that the checksum should be calculated
+ * @return checksum (as u16_t) to be saved directly in the protocol header
+ */
+u16_t
+inet_chksum_pbuf(struct pbuf *p)
+{
+  u32_t acc;
+  struct pbuf *q;
+  u8_t swapped;
+
+  acc = 0;
+  swapped = 0;
+  for(q = p; q != NULL; q = q->next) {
+    acc += LWIP_CHKSUM(q->payload, q->len);
+    acc = FOLD_U32T(acc);
+    if (q->len % 2 != 0) {
+      swapped = 1 - swapped;
+      acc = SWAP_BYTES_IN_WORD(acc);
+    }
+  }
+
+  if (swapped) {
+    acc = SWAP_BYTES_IN_WORD(acc);
+  }
+  return (u16_t)~(acc & 0xffffUL);
+}
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip.c
new file mode 100644
index 000000000..7e404a9f3
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip.c
@@ -0,0 +1,749 @@
+/**
+ * @file
+ * This is the IPv4 layer implementation for incoming and outgoing IP traffic.
+ * 
+ * @see ip_frag.c
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+#include "lwip/ip.h"
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/ip_frag.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+#include "lwip/netif.h"
+#include "lwip/icmp.h"
+#include "lwip/igmp.h"
+#include "lwip/raw.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+#include "lwip/snmp.h"
+#include "lwip/dhcp.h"
+#include "lwip/stats.h"
+#include "arch/perf.h"
+
+#include <string.h>
+
+/**
+ * The interface that provided the packet for the current callback
+ * invocation.
+ */
+static struct netif *current_netif;
+
+/**
+ * Header of the input packet currently being processed.
+ */
+static const struct ip_hdr *current_header;
+
+/**
+ * Get the interface that received the current packet.
+ *
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise.
+ *
+ * @param pcb Pointer to the pcb receiving a packet.
+ */
+struct netif *
+ip_current_netif(void)
+{
+  return current_netif;
+}
+
+/**
+ * Get the IP header of the current packet.
+ *
+ * This function must only be called from a receive callback (udp_recv,
+ * raw_recv, tcp_accept). It will return NULL otherwise.
+ *
+ * @param pcb Pointer to the pcb receiving a packet.
+ */
+const struct ip_hdr *
+ip_current_header(void)
+{
+  return current_header;
+}
+
+/**
+ * Finds the appropriate network interface for a given IP address. It
+ * searches the list of network interfaces linearly. A match is found
+ * if the masked IP address of the network interface equals the masked
+ * IP address given to the function.
+ *
+ * @param dest the destination IP address for which to find the route
+ * @return the netif on which to send to reach dest
+ */
+struct netif *
+ip_route(struct ip_addr *dest)
+{
+  struct netif *netif;
+
+  /* iterate through netifs */
+  for(netif = netif_list; netif != NULL; netif = netif->next) {
+    /* network mask matches? */
+    if (netif_is_up(netif)) {
+      if (ip_addr_netcmp(dest, &(netif->ip_addr), &(netif->netmask))) {
+        /* return netif on which to forward IP packet */
+        return netif;
+      }
+    }
+  }
+  if ((netif_default == NULL) || (!netif_is_up(netif_default))) {
+    LWIP_DEBUGF(IP_DEBUG | 2, ("ip_route: No route to 0x%"X32_F"\n", dest->addr));
+    IP_STATS_INC(ip.rterr);
+    snmp_inc_ipoutnoroutes();
+    return NULL;
+  }
+  /* no matching netif found, use default netif */
+  return netif_default;
+}
+
+#if IP_FORWARD
+/**
+ * Forwards an IP packet. It finds an appropriate route for the
+ * packet, decrements the TTL value of the packet, adjusts the
+ * checksum and outputs the packet on the appropriate interface.
+ *
+ * @param p the packet to forward (p->payload points to IP header)
+ * @param iphdr the IP header of the input packet
+ * @param inp the netif on which this packet was received
+ * @return the netif on which the packet was sent (NULL if it wasn't sent)
+ */
+static struct netif *
+ip_forward(struct pbuf *p, struct ip_hdr *iphdr, struct netif *inp)
+{
+  struct netif *netif;
+
+  PERF_START;
+  /* Find network interface where to forward this IP packet to. */
+  netif = ip_route((struct ip_addr *)&(iphdr->dest));
+  if (netif == NULL) {
+    LWIP_DEBUGF(IP_DEBUG, ("ip_forward: no forwarding route for 0x%"X32_F" found\n",
+                      iphdr->dest.addr));
+    snmp_inc_ipoutnoroutes();
+    return (struct netif *)NULL;
+  }
+  /* Do not forward packets onto the same network interface on which
+   * they arrived. */
+  if (netif == inp) {
+    LWIP_DEBUGF(IP_DEBUG, ("ip_forward: not bouncing packets back on incoming interface.\n"));
+    snmp_inc_ipoutnoroutes();
+    return (struct netif *)NULL;
+  }
+
+  /* decrement TTL */
+  IPH_TTL_SET(iphdr, IPH_TTL(iphdr) - 1);
+  /* send ICMP if TTL == 0 */
+  if (IPH_TTL(iphdr) == 0) {
+    snmp_inc_ipinhdrerrors();
+#if LWIP_ICMP
+    /* Don't send ICMP messages in response to ICMP messages */
+    if (IPH_PROTO(iphdr) != IP_PROTO_ICMP) {
+      icmp_time_exceeded(p, ICMP_TE_TTL);
+    }
+#endif /* LWIP_ICMP */
+    return (struct netif *)NULL;
+  }
+
+  /* Incrementally update the IP checksum. */
+  if (IPH_CHKSUM(iphdr) >= htons(0xffff - 0x100)) {
+    IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + htons(0x100) + 1);
+  } else {
+    IPH_CHKSUM_SET(iphdr, IPH_CHKSUM(iphdr) + htons(0x100));
+  }
+
+  LWIP_DEBUGF(IP_DEBUG, ("ip_forward: forwarding packet to 0x%"X32_F"\n",
+                    iphdr->dest.addr));
+
+  IP_STATS_INC(ip.fw);
+  IP_STATS_INC(ip.xmit);
+  snmp_inc_ipforwdatagrams();
+
+  PERF_STOP("ip_forward");
+  /* transmit pbuf on chosen interface */
+  netif->output(netif, p, (struct ip_addr *)&(iphdr->dest));
+  return netif;
+}
+#endif /* IP_FORWARD */
+
+/**
+ * This function is called by the network interface device driver when
+ * an IP packet is received. The function does the basic checks of the
+ * IP header such as packet size being at least larger than the header
+ * size etc. If the packet was not destined for us, the packet is
+ * forwarded (using ip_forward). The IP checksum is always checked.
+ *
+ * Finally, the packet is sent to the upper layer protocol input function.
+ * 
+ * @param p the received IP packet (p->payload points to IP header)
+ * @param inp the netif on which this packet was received
+ * @return ERR_OK if the packet was processed (could return ERR_* if it wasn't
+ *         processed, but currently always returns ERR_OK)
+ */
+err_t
+ip_input(struct pbuf *p, struct netif *inp)
+{
+  struct ip_hdr *iphdr;
+  struct netif *netif;
+  u16_t iphdr_hlen;
+  u16_t iphdr_len;
+#if LWIP_DHCP
+  int check_ip_src=1;
+#endif /* LWIP_DHCP */
+
+  IP_STATS_INC(ip.recv);
+  snmp_inc_ipinreceives();
+
+  /* identify the IP header */
+  iphdr = p->payload;
+  if (IPH_V(iphdr) != 4) {
+    LWIP_DEBUGF(IP_DEBUG | 1, ("IP packet dropped due to bad version number %"U16_F"\n", IPH_V(iphdr)));
+    ip_debug_print(p);
+    pbuf_free(p);
+    IP_STATS_INC(ip.err);
+    IP_STATS_INC(ip.drop);
+    snmp_inc_ipinhdrerrors();
+    return ERR_OK;
+  }
+
+  /* obtain IP header length in number of 32-bit words */
+  iphdr_hlen = IPH_HL(iphdr);
+  /* calculate IP header length in bytes */
+  iphdr_hlen *= 4;
+  /* obtain ip length in bytes */
+  iphdr_len = ntohs(IPH_LEN(iphdr));
+
+  /* header length exceeds first pbuf length, or ip length exceeds total pbuf length? */
+  if ((iphdr_hlen > p->len) || (iphdr_len > p->tot_len)) {
+    if (iphdr_hlen > p->len)
+    LWIP_DEBUGF(IP_DEBUG | 2, ("IP header (len %"U16_F") does not fit in first pbuf (len %"U16_F"), IP packet dropped.\n",
+                               iphdr_hlen, p->len));
+    if (iphdr_len > p->tot_len)
+    LWIP_DEBUGF(IP_DEBUG | 2, ("IP (len %"U16_F") is longer than pbuf (len %"U16_F"), "
+                               "IP packet dropped.\n",
+                               iphdr_len, p->tot_len));
+    /* free (drop) packet pbufs */
+    pbuf_free(p);
+    IP_STATS_INC(ip.lenerr);
+    IP_STATS_INC(ip.drop);
+    snmp_inc_ipindiscards();
+    return ERR_OK;
+  }
+
+  /* verify checksum */
+#if CHECKSUM_CHECK_IP
+  if (inet_chksum(iphdr, iphdr_hlen) != 0) {
+
+    LWIP_DEBUGF(IP_DEBUG | 2, ("Checksum (0x%"X16_F") failed, IP packet dropped.\n", inet_chksum(iphdr, iphdr_hlen)));
+    ip_debug_print(p);
+    pbuf_free(p);
+    IP_STATS_INC(ip.chkerr);
+    IP_STATS_INC(ip.drop);
+    snmp_inc_ipinhdrerrors();
+    return ERR_OK;
+  }
+#endif
+
+  /* Trim pbuf. This should have been done at the netif layer,
+   * but we'll do it anyway just to be sure that its done. */
+  pbuf_realloc(p, iphdr_len);
+
+  /* match packet against an interface, i.e. is this packet for us? */
+#if LWIP_IGMP
+  if (ip_addr_ismulticast(&(iphdr->dest))) {
+    if ((inp->flags & NETIF_FLAG_IGMP) && (igmp_lookfor_group(inp, &(iphdr->dest)))) {
+      netif = inp;
+    } else {
+      netif = NULL;
+    }
+  } else
+#endif /* LWIP_IGMP */
+  {
+    /* start trying with inp. if that's not acceptable, start walking the
+       list of configured netifs.
+       'first' is used as a boolean to mark whether we started walking the list */
+    int first = 1;
+    netif = inp;
+    do {
+      LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest 0x%"X32_F" netif->ip_addr 0x%"X32_F" (0x%"X32_F", 0x%"X32_F", 0x%"X32_F")\n",
+          iphdr->dest.addr, netif->ip_addr.addr,
+          iphdr->dest.addr & netif->netmask.addr,
+          netif->ip_addr.addr & netif->netmask.addr,
+          iphdr->dest.addr & ~(netif->netmask.addr)));
+
+      /* interface is up and configured? */
+      if ((netif_is_up(netif)) && (!ip_addr_isany(&(netif->ip_addr)))) {
+        /* unicast to this interface address? */
+        if (ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr)) ||
+            /* or broadcast on this interface network address? */
+            ip_addr_isbroadcast(&(iphdr->dest), netif)) {
+          LWIP_DEBUGF(IP_DEBUG, ("ip_input: packet accepted on interface %c%c\n",
+              netif->name[0], netif->name[1]));
+          /* break out of for loop */
+          break;
+        }
+      }
+      if (first) {
+        first = 0;
+        netif = netif_list;
+      } else {
+        netif = netif->next;
+      }
+      if (netif == inp) {
+        netif = netif->next;
+      }
+    } while(netif != NULL);
+  }
+
+#if LWIP_DHCP
+  /* Pass DHCP messages regardless of destination address. DHCP traffic is addressed
+   * using link layer addressing (such as Ethernet MAC) so we must not filter on IP.
+   * According to RFC 1542 section 3.1.1, referred by RFC 2131).
+   */
+  if (netif == NULL) {
+    /* remote port is DHCP server? */
+    if (IPH_PROTO(iphdr) == IP_PROTO_UDP) {
+      LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE | 1, ("ip_input: UDP packet to DHCP client port %"U16_F"\n",
+        ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdr_hlen))->dest)));
+      if (ntohs(((struct udp_hdr *)((u8_t *)iphdr + iphdr_hlen))->dest) == DHCP_CLIENT_PORT) {
+        LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE | 1, ("ip_input: DHCP packet accepted.\n"));
+        netif = inp;
+        check_ip_src = 0;
+      }
+    }
+  }
+#endif /* LWIP_DHCP */
+
+  /* broadcast or multicast packet source address? Compliant with RFC 1122: 3.2.1.3 */
+#if LWIP_DHCP
+  if (check_ip_src)
+#endif /* LWIP_DHCP */
+  {  if ((ip_addr_isbroadcast(&(iphdr->src), inp)) ||
+         (ip_addr_ismulticast(&(iphdr->src)))) {
+      /* packet source is not valid */
+      LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE | 1, ("ip_input: packet source is not valid.\n"));
+      /* free (drop) packet pbufs */
+      pbuf_free(p);
+      IP_STATS_INC(ip.drop);
+      snmp_inc_ipinaddrerrors();
+      snmp_inc_ipindiscards();
+      return ERR_OK;
+    }
+  }
+
+  /* packet not for us? */
+  if (netif == NULL) {
+    /* packet not for us, route or discard */
+    LWIP_DEBUGF(IP_DEBUG | LWIP_DBG_TRACE | 1, ("ip_input: packet not for us.\n"));
+#if IP_FORWARD
+    /* non-broadcast packet? */
+    if (!ip_addr_isbroadcast(&(iphdr->dest), inp)) {
+      /* try to forward IP packet on (other) interfaces */
+      ip_forward(p, iphdr, inp);
+    } else
+#endif /* IP_FORWARD */
+    {
+      snmp_inc_ipinaddrerrors();
+      snmp_inc_ipindiscards();
+    }
+    pbuf_free(p);
+    return ERR_OK;
+  }
+  /* packet consists of multiple fragments? */
+  if ((IPH_OFFSET(iphdr) & htons(IP_OFFMASK | IP_MF)) != 0) {
+#if IP_REASSEMBLY /* packet fragment reassembly code present? */
+    LWIP_DEBUGF(IP_DEBUG, ("IP packet is a fragment (id=0x%04"X16_F" tot_len=%"U16_F" len=%"U16_F" MF=%"U16_F" offset=%"U16_F"), calling ip_reass()\n",
+      ntohs(IPH_ID(iphdr)), p->tot_len, ntohs(IPH_LEN(iphdr)), !!(IPH_OFFSET(iphdr) & htons(IP_MF)), (ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK)*8));
+    /* reassemble the packet*/
+    p = ip_reass(p);
+    /* packet not fully reassembled yet? */
+    if (p == NULL) {
+      return ERR_OK;
+    }
+    iphdr = p->payload;
+#else /* IP_REASSEMBLY == 0, no packet fragment reassembly code present */
+    pbuf_free(p);
+    LWIP_DEBUGF(IP_DEBUG | 2, ("IP packet dropped since it was fragmented (0x%"X16_F") (while IP_REASSEMBLY == 0).\n",
+      ntohs(IPH_OFFSET(iphdr))));
+    IP_STATS_INC(ip.opterr);
+    IP_STATS_INC(ip.drop);
+    /* unsupported protocol feature */
+    snmp_inc_ipinunknownprotos();
+    return ERR_OK;
+#endif /* IP_REASSEMBLY */
+  }
+
+#if IP_OPTIONS_ALLOWED == 0 /* no support for IP options in the IP header? */
+
+#if LWIP_IGMP
+  /* there is an extra "router alert" option in IGMP messages which we allow for but do not police */
+  if((iphdr_hlen > IP_HLEN &&  (IPH_PROTO(iphdr) != IP_PROTO_IGMP)) {
+#else
+  if (iphdr_hlen > IP_HLEN) {
+#endif /* LWIP_IGMP */
+    LWIP_DEBUGF(IP_DEBUG | 2, ("IP packet dropped since there were IP options (while IP_OPTIONS_ALLOWED == 0).\n"));
+    pbuf_free(p);
+    IP_STATS_INC(ip.opterr);
+    IP_STATS_INC(ip.drop);
+    /* unsupported protocol feature */
+    snmp_inc_ipinunknownprotos();
+    return ERR_OK;
+  }
+#endif /* IP_OPTIONS_ALLOWED == 0 */
+
+  /* send to upper layers */
+  LWIP_DEBUGF(IP_DEBUG, ("ip_input: \n"));
+  ip_debug_print(p);
+  LWIP_DEBUGF(IP_DEBUG, ("ip_input: p->len %"U16_F" p->tot_len %"U16_F"\n", p->len, p->tot_len));
+
+  current_netif = inp;
+  current_header = iphdr;
+
+#if LWIP_RAW
+  /* raw input did not eat the packet? */
+  if (raw_input(p, inp) == 0)
+#endif /* LWIP_RAW */
+  {
+
+    switch (IPH_PROTO(iphdr)) {
+#if LWIP_UDP
+    case IP_PROTO_UDP:
+#if LWIP_UDPLITE
+    case IP_PROTO_UDPLITE:
+#endif /* LWIP_UDPLITE */
+      snmp_inc_ipindelivers();
+      udp_input(p, inp);
+      break;
+#endif /* LWIP_UDP */
+#if LWIP_TCP
+    case IP_PROTO_TCP:
+      snmp_inc_ipindelivers();
+      tcp_input(p, inp);
+      break;
+#endif /* LWIP_TCP */
+#if LWIP_ICMP
+    case IP_PROTO_ICMP:
+      snmp_inc_ipindelivers();
+      icmp_input(p, inp);
+      break;
+#endif /* LWIP_ICMP */
+#if LWIP_IGMP
+    case IP_PROTO_IGMP:
+      igmp_input(p,inp,&(iphdr->dest));
+      break;
+#endif /* LWIP_IGMP */
+    default:
+#if LWIP_ICMP
+      /* send ICMP destination protocol unreachable unless is was a broadcast */
+      if (!ip_addr_isbroadcast(&(iphdr->dest), inp) &&
+          !ip_addr_ismulticast(&(iphdr->dest))) {
+        p->payload = iphdr;
+        icmp_dest_unreach(p, ICMP_DUR_PROTO);
+      }
+#endif /* LWIP_ICMP */
+      pbuf_free(p);
+
+      LWIP_DEBUGF(IP_DEBUG | 2, ("Unsupported transport protocol %"U16_F"\n", IPH_PROTO(iphdr)));
+
+      IP_STATS_INC(ip.proterr);
+      IP_STATS_INC(ip.drop);
+      snmp_inc_ipinunknownprotos();
+    }
+  }
+
+  current_netif = NULL;
+  current_header = NULL;
+
+  return ERR_OK;
+}
+
+/**
+ * Sends an IP packet on a network interface. This function constructs
+ * the IP header and calculates the IP header checksum. If the source
+ * IP address is NULL, the IP address of the outgoing network
+ * interface is filled in as source address.
+ * If the destination IP address is IP_HDRINCL, p is assumed to already
+ * include an IP header and p->payload points to it instead of the data.
+ *
+ * @param p the packet to send (p->payload points to the data, e.g. next
+            protocol header; if dest == IP_HDRINCL, p already includes an IP
+            header and p->payload points to that IP header)
+ * @param src the source IP address to send from (if src == IP_ADDR_ANY, the
+ *         IP  address of the netif used to send is used as source address)
+ * @param dest the destination IP address to send the packet to
+ * @param ttl the TTL value to be set in the IP header
+ * @param tos the TOS value to be set in the IP header
+ * @param proto the PROTOCOL to be set in the IP header
+ * @param netif the netif on which to send this packet
+ * @return ERR_OK if the packet was sent OK
+ *         ERR_BUF if p doesn't have enough space for IP/LINK headers
+ *         returns errors returned by netif->output
+ *
+ * @note ip_id: RFC791 "some host may be able to simply use
+ *  unique identifiers independent of destination"
+ */
+err_t
+ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+             u8_t ttl, u8_t tos,
+             u8_t proto, struct netif *netif)
+{
+#if IP_OPTIONS_SEND
+  return ip_output_if_opt(p, src, dest, ttl, tos, proto, netif, NULL, 0);
+}
+
+/**
+ * Same as ip_output_if() but with the possibility to include IP options:
+ *
+ * @ param ip_options pointer to the IP options, copied into the IP header
+ * @ param optlen length of ip_options
+ */
+err_t ip_output_if_opt(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+       u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
+       u16_t optlen)
+{
+#endif /* IP_OPTIONS_SEND */
+  struct ip_hdr *iphdr;
+  static u16_t ip_id = 0;
+
+  snmp_inc_ipoutrequests();
+
+  /* Should the IP header be generated or is it already included in p? */
+  if (dest != IP_HDRINCL) {
+    u16_t ip_hlen = IP_HLEN;
+#if IP_OPTIONS_SEND
+    u16_t optlen_aligned = 0;
+    if (optlen != 0) {
+      /* round up to a multiple of 4 */
+      optlen_aligned = ((optlen + 3) & ~3);
+      ip_hlen += optlen_aligned;
+      /* First write in the IP options */
+      if (pbuf_header(p, optlen_aligned)) {
+        LWIP_DEBUGF(IP_DEBUG | 2, ("ip_output_if_opt: not enough room for IP options in pbuf\n"));
+        IP_STATS_INC(ip.err);
+        snmp_inc_ipoutdiscards();
+        return ERR_BUF;
+      }
+      MEMCPY(p->payload, ip_options, optlen);
+      if (optlen < optlen_aligned) {
+        /* zero the remaining bytes */
+        memset(((char*)p->payload) + optlen, 0, optlen_aligned - optlen);
+      }
+    }
+#endif /* IP_OPTIONS_SEND */
+    /* generate IP header */
+    if (pbuf_header(p, IP_HLEN)) {
+      LWIP_DEBUGF(IP_DEBUG | 2, ("ip_output: not enough room for IP header in pbuf\n"));
+
+      IP_STATS_INC(ip.err);
+      snmp_inc_ipoutdiscards();
+      return ERR_BUF;
+    }
+
+    iphdr = p->payload;
+    LWIP_ASSERT("check that first pbuf can hold struct ip_hdr",
+               (p->len >= sizeof(struct ip_hdr)));
+
+    IPH_TTL_SET(iphdr, ttl);
+    IPH_PROTO_SET(iphdr, proto);
+
+    ip_addr_set(&(iphdr->dest), dest);
+
+    IPH_VHLTOS_SET(iphdr, 4, ip_hlen / 4, tos);
+    IPH_LEN_SET(iphdr, htons(p->tot_len));
+    IPH_OFFSET_SET(iphdr, 0);
+    IPH_ID_SET(iphdr, htons(ip_id));
+    ++ip_id;
+
+    if (ip_addr_isany(src)) {
+      ip_addr_set(&(iphdr->src), &(netif->ip_addr));
+    } else {
+      ip_addr_set(&(iphdr->src), src);
+    }
+
+    IPH_CHKSUM_SET(iphdr, 0);
+#if CHECKSUM_GEN_IP
+    IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, ip_hlen));
+#endif
+  } else {
+    /* IP header already included in p */
+    iphdr = p->payload;
+    dest = &(iphdr->dest);
+  }
+
+#if IP_FRAG
+  /* don't fragment if interface has mtu set to 0 [loopif] */
+  if (netif->mtu && (p->tot_len > netif->mtu))
+    return ip_frag(p,netif,dest);
+#endif
+
+  IP_STATS_INC(ip.xmit);
+
+  LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c%"U16_F"\n", netif->name[0], netif->name[1], netif->num));
+  ip_debug_print(p);
+
+#if (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF)
+  if (ip_addr_cmp(dest, &netif->ip_addr)) {
+    /* Packet to self, enqueue it for loopback */
+    LWIP_DEBUGF(IP_DEBUG, ("netif_loop_output()"));
+
+    return netif_loop_output(netif, p, dest);
+  } else
+#endif /* (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF) */
+  {
+    LWIP_DEBUGF(IP_DEBUG, ("netif->output()"));
+
+    return netif->output(netif, p, dest);
+  }
+}
+
+/**
+ * Simple interface to ip_output_if. It finds the outgoing network
+ * interface and calls upon ip_output_if to do the actual work.
+ *
+ * @param p the packet to send (p->payload points to the data, e.g. next
+            protocol header; if dest == IP_HDRINCL, p already includes an IP
+            header and p->payload points to that IP header)
+ * @param src the source IP address to send from (if src == IP_ADDR_ANY, the
+ *         IP  address of the netif used to send is used as source address)
+ * @param dest the destination IP address to send the packet to
+ * @param ttl the TTL value to be set in the IP header
+ * @param tos the TOS value to be set in the IP header
+ * @param proto the PROTOCOL to be set in the IP header
+ *
+ * @return ERR_RTE if no route is found
+ *         see ip_output_if() for more return values
+ */
+err_t
+ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+          u8_t ttl, u8_t tos, u8_t proto)
+{
+  struct netif *netif;
+
+  if ((netif = ip_route(dest)) == NULL) {
+    LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to 0x%"X32_F"\n", dest->addr));
+    IP_STATS_INC(ip.rterr);
+    return ERR_RTE;
+  }
+
+  return ip_output_if(p, src, dest, ttl, tos, proto, netif);
+}
+
+#if LWIP_NETIF_HWADDRHINT
+/** Like ip_output, but takes and addr_hint pointer that is passed on to netif->addr_hint
+ *  before calling ip_output_if.
+ *
+ * @param p the packet to send (p->payload points to the data, e.g. next
+            protocol header; if dest == IP_HDRINCL, p already includes an IP
+            header and p->payload points to that IP header)
+ * @param src the source IP address to send from (if src == IP_ADDR_ANY, the
+ *         IP  address of the netif used to send is used as source address)
+ * @param dest the destination IP address to send the packet to
+ * @param ttl the TTL value to be set in the IP header
+ * @param tos the TOS value to be set in the IP header
+ * @param proto the PROTOCOL to be set in the IP header
+ * @param addr_hint address hint pointer set to netif->addr_hint before
+ *        calling ip_output_if()
+ *
+ * @return ERR_RTE if no route is found
+ *         see ip_output_if() for more return values
+ */
+err_t
+ip_output_hinted(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+          u8_t ttl, u8_t tos, u8_t proto, u8_t *addr_hint)
+{
+  struct netif *netif;
+  err_t err;
+
+  if ((netif = ip_route(dest)) == NULL) {
+    LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to 0x%"X32_F"\n", dest->addr));
+    IP_STATS_INC(ip.rterr);
+    return ERR_RTE;
+  }
+
+  netif->addr_hint = addr_hint;
+  err = ip_output_if(p, src, dest, ttl, tos, proto, netif);
+  netif->addr_hint = NULL;
+
+  return err;
+}
+#endif /* LWIP_NETIF_HWADDRHINT*/
+
+#if IP_DEBUG
+/* Print an IP header by using LWIP_DEBUGF
+ * @param p an IP packet, p->payload pointing to the IP header
+ */
+void
+ip_debug_print(struct pbuf *p)
+{
+  struct ip_hdr *iphdr = p->payload;
+  u8_t *payload;
+
+  payload = (u8_t *)iphdr + IP_HLEN;
+
+  LWIP_DEBUGF(IP_DEBUG, ("IP header:\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|%2"S16_F" |%2"S16_F" |  0x%02"X16_F" |     %5"U16_F"     | (v, hl, tos, len)\n",
+                    IPH_V(iphdr),
+                    IPH_HL(iphdr),
+                    IPH_TOS(iphdr),
+                    ntohs(IPH_LEN(iphdr))));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|    %5"U16_F"      |%"U16_F"%"U16_F"%"U16_F"|    %4"U16_F"   | (id, flags, offset)\n",
+                    ntohs(IPH_ID(iphdr)),
+                    ntohs(IPH_OFFSET(iphdr)) >> 15 & 1,
+                    ntohs(IPH_OFFSET(iphdr)) >> 14 & 1,
+                    ntohs(IPH_OFFSET(iphdr)) >> 13 & 1,
+                    ntohs(IPH_OFFSET(iphdr)) & IP_OFFMASK));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|  %3"U16_F"  |  %3"U16_F"  |    0x%04"X16_F"     | (ttl, proto, chksum)\n",
+                    IPH_TTL(iphdr),
+                    IPH_PROTO(iphdr),
+                    ntohs(IPH_CHKSUM(iphdr))));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|  %3"U16_F"  |  %3"U16_F"  |  %3"U16_F"  |  %3"U16_F"  | (src)\n",
+                    ip4_addr1(&iphdr->src),
+                    ip4_addr2(&iphdr->src),
+                    ip4_addr3(&iphdr->src),
+                    ip4_addr4(&iphdr->src)));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|  %3"U16_F"  |  %3"U16_F"  |  %3"U16_F"  |  %3"U16_F"  | (dest)\n",
+                    ip4_addr1(&iphdr->dest),
+                    ip4_addr2(&iphdr->dest),
+                    ip4_addr3(&iphdr->dest),
+                    ip4_addr4(&iphdr->dest)));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+}
+#endif /* IP_DEBUG */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip_addr.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip_addr.c
new file mode 100644
index 000000000..94bf4678a
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip_addr.c
@@ -0,0 +1,84 @@
+/**
+ * @file
+ * This is the IPv4 address tools implementation.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+#include "lwip/inet.h"
+#include "lwip/netif.h"
+
+#define IP_ADDR_ANY_VALUE 0x00000000UL
+#define IP_ADDR_BROADCAST_VALUE 0xffffffffUL
+
+/* used by IP_ADDR_ANY and IP_ADDR_BROADCAST in ip_addr.h */
+const struct ip_addr ip_addr_any = { IP_ADDR_ANY_VALUE };
+const struct ip_addr ip_addr_broadcast = { IP_ADDR_BROADCAST_VALUE };
+
+/**
+ * Determine if an address is a broadcast address on a network interface 
+ * 
+ * @param addr address to be checked
+ * @param netif the network interface against which the address is checked
+ * @return returns non-zero if the address is a broadcast address
+ */
+u8_t ip_addr_isbroadcast(struct ip_addr *addr, struct netif *netif)
+{
+  u32_t addr2test;
+
+  addr2test = addr->addr;
+  /* all ones (broadcast) or all zeroes (old skool broadcast) */
+  if ((~addr2test == IP_ADDR_ANY_VALUE) ||
+      (addr2test == IP_ADDR_ANY_VALUE))
+    return 1;
+  /* no broadcast support on this network interface? */
+  else if ((netif->flags & NETIF_FLAG_BROADCAST) == 0)
+    /* the given address cannot be a broadcast address
+     * nor can we check against any broadcast addresses */
+    return 0;
+  /* address matches network interface address exactly? => no broadcast */
+  else if (addr2test == netif->ip_addr.addr)
+    return 0;
+  /*  on the same (sub) network... */
+  else if (ip_addr_netcmp(addr, &(netif->ip_addr), &(netif->netmask))
+         /* ...and host identifier bits are all ones? =>... */
+          && ((addr2test & ~netif->netmask.addr) ==
+           (IP_ADDR_BROADCAST_VALUE & ~netif->netmask.addr)))
+    /* => network broadcast address */
+    return 1;
+  else
+    return 0;
+}
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip_frag.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip_frag.c
new file mode 100644
index 000000000..1939d831b
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv4/ip_frag.c
@@ -0,0 +1,792 @@
+/**
+ * @file
+ * This is the IPv4 packet segmentation and reassembly implementation.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Jani Monoses <jani@iv.ro> 
+ *         Simon Goldschmidt
+ * original reassembly code by Adam Dunkels <adam@sics.se>
+ * 
+ */
+
+#include "lwip/opt.h"
+#include "lwip/ip_frag.h"
+#include "lwip/ip.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+#include "lwip/netif.h"
+#include "lwip/snmp.h"
+#include "lwip/stats.h"
+#include "lwip/icmp.h"
+
+#include <string.h>
+
+#if IP_REASSEMBLY
+/**
+ * The IP reassembly code currently has the following limitations:
+ * - IP header options are not supported
+ * - fragments must not overlap (e.g. due to different routes),
+ *   currently, overlapping or duplicate fragments are thrown away
+ *   if IP_REASS_CHECK_OVERLAP=1 (the default)!
+ *
+ * @todo: work with IP header options
+ */
+
+/** Setting this to 0, you can turn off checking the fragments for overlapping
+ * regions. The code gets a little smaller. Only use this if you know that
+ * overlapping won't occur on your network! */
+#ifndef IP_REASS_CHECK_OVERLAP
+#define IP_REASS_CHECK_OVERLAP 1
+#endif /* IP_REASS_CHECK_OVERLAP */
+
+/** Set to 0 to prevent freeing the oldest datagram when the reassembly buffer is
+ * full (IP_REASS_MAX_PBUFS pbufs are enqueued). The code gets a little smaller.
+ * Datagrams will be freed by timeout only. Especially useful when MEMP_NUM_REASSDATA
+ * is set to 1, so one datagram can be reassembled at a time, only. */
+#ifndef IP_REASS_FREE_OLDEST
+#define IP_REASS_FREE_OLDEST 1
+#endif /* IP_REASS_FREE_OLDEST */
+
+#define IP_REASS_FLAG_LASTFRAG 0x01
+
+/** This is a helper struct which holds the starting
+ * offset and the ending offset of this fragment to
+ * easily chain the fragments.
+ * It has to be packed since it has to fit inside the IP header.
+ */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct ip_reass_helper {
+  PACK_STRUCT_FIELD(struct pbuf *next_pbuf);
+  PACK_STRUCT_FIELD(u16_t start);
+  PACK_STRUCT_FIELD(u16_t end);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#define IP_ADDRESSES_AND_ID_MATCH(iphdrA, iphdrB)  \
+  (ip_addr_cmp(&(iphdrA)->src, &(iphdrB)->src) && \
+   ip_addr_cmp(&(iphdrA)->dest, &(iphdrB)->dest) && \
+   IPH_ID(iphdrA) == IPH_ID(iphdrB)) ? 1 : 0
+
+/* global variables */
+static struct ip_reassdata *reassdatagrams;
+static u16_t ip_reass_pbufcount;
+
+/* function prototypes */
+static void ip_reass_dequeue_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev);
+static int ip_reass_free_complete_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev);
+
+/**
+ * Reassembly timer base function
+ * for both NO_SYS == 0 and 1 (!).
+ *
+ * Should be called every 1000 msec (defined by IP_TMR_INTERVAL).
+ */
+void
+ip_reass_tmr(void)
+{
+  struct ip_reassdata *r, *prev = NULL;
+
+  r = reassdatagrams;
+  while (r != NULL) {
+    /* Decrement the timer. Once it reaches 0,
+     * clean up the incomplete fragment assembly */
+    if (r->timer > 0) {
+      r->timer--;
+      LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer dec %"U16_F"\n",(u16_t)r->timer));
+      prev = r;
+      r = r->next;
+    } else {
+      /* reassembly timed out */
+      struct ip_reassdata *tmp;
+      LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass_tmr: timer timed out\n"));
+      tmp = r;
+      /* get the next pointer before freeing */
+      r = r->next;
+      /* free the helper struct and all enqueued pbufs */
+      ip_reass_free_complete_datagram(tmp, prev);
+     }
+   }
+}
+
+/**
+ * Free a datagram (struct ip_reassdata) and all its pbufs.
+ * Updates the total count of enqueued pbufs (ip_reass_pbufcount),
+ * SNMP counters and sends an ICMP time exceeded packet.
+ *
+ * @param ipr datagram to free
+ * @param prev the previous datagram in the linked list
+ * @return the number of pbufs freed
+ */
+static int
+ip_reass_free_complete_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev)
+{
+  int pbufs_freed = 0;
+  struct pbuf *p;
+  struct ip_reass_helper *iprh;
+
+  LWIP_ASSERT("prev != ipr", prev != ipr);
+  if (prev != NULL) {
+    LWIP_ASSERT("prev->next == ipr", prev->next == ipr);
+  }
+
+  snmp_inc_ipreasmfails();
+#if LWIP_ICMP
+  iprh = (struct ip_reass_helper *)ipr->p->payload;
+  if (iprh->start == 0) {
+    /* The first fragment was received, send ICMP time exceeded. */
+    /* First, de-queue the first pbuf from r->p. */
+    p = ipr->p;
+    ipr->p = iprh->next_pbuf;
+    /* Then, copy the original header into it. */
+    SMEMCPY(p->payload, &ipr->iphdr, IP_HLEN);
+    icmp_time_exceeded(p, ICMP_TE_FRAG);
+    pbufs_freed += pbuf_clen(p);
+    pbuf_free(p);
+  }
+#endif /* LWIP_ICMP */
+
+  /* First, free all received pbufs.  The individual pbufs need to be released 
+     separately as they have not yet been chained */
+  p = ipr->p;
+  while (p != NULL) {
+    struct pbuf *pcur;
+    iprh = (struct ip_reass_helper *)p->payload;
+    pcur = p;
+    /* get the next pointer before freeing */
+    p = iprh->next_pbuf;
+    pbufs_freed += pbuf_clen(pcur);
+    pbuf_free(pcur);    
+  }
+  /* Then, unchain the struct ip_reassdata from the list and free it. */
+  ip_reass_dequeue_datagram(ipr, prev);
+  LWIP_ASSERT("ip_reass_pbufcount >= clen", ip_reass_pbufcount >= pbufs_freed);
+  ip_reass_pbufcount -= pbufs_freed;
+
+  return pbufs_freed;
+}
+
+#if IP_REASS_FREE_OLDEST
+/**
+ * Free the oldest datagram to make room for enqueueing new fragments.
+ * The datagram 'fraghdr' belongs to is not freed!
+ *
+ * @param fraghdr IP header of the current fragment
+ * @param pbufs_needed number of pbufs needed to enqueue
+ *        (used for freeing other datagrams if not enough space)
+ * @return the number of pbufs freed
+ */
+static int
+ip_reass_remove_oldest_datagram(struct ip_hdr *fraghdr, int pbufs_needed)
+{
+  /* @todo Can't we simply remove the last datagram in the
+   *       linked list behind reassdatagrams?
+   */
+  struct ip_reassdata *r, *oldest, *prev;
+  int pbufs_freed = 0, pbufs_freed_current;
+  int other_datagrams;
+
+  /* Free datagrams until being allowed to enqueue 'pbufs_needed' pbufs,
+   * but don't free the datagram that 'fraghdr' belongs to! */
+  do {
+    oldest = NULL;
+    prev = NULL;
+    other_datagrams = 0;
+    r = reassdatagrams;
+    while (r != NULL) {
+      if (!IP_ADDRESSES_AND_ID_MATCH(&r->iphdr, fraghdr)) {
+        /* Not the same datagram as fraghdr */
+        other_datagrams++;
+        if (oldest == NULL) {
+          oldest = r;
+        } else if (r->timer <= oldest->timer) {
+          /* older than the previous oldest */
+          oldest = r;
+        }
+      }
+      if (r->next != NULL) {
+        prev = r;
+      }
+      r = r->next;
+    }
+    if (oldest != NULL) {
+      pbufs_freed_current = ip_reass_free_complete_datagram(oldest, prev);
+      pbufs_freed += pbufs_freed_current;
+    }
+  } while ((pbufs_freed < pbufs_needed) && (other_datagrams > 1));
+  return pbufs_freed;
+}
+#endif /* IP_REASS_FREE_OLDEST */
+
+/**
+ * Enqueues a new fragment into the fragment queue
+ * @param fraghdr points to the new fragments IP hdr
+ * @param clen number of pbufs needed to enqueue (used for freeing other datagrams if not enough space)
+ * @return A pointer to the queue location into which the fragment was enqueued
+ */
+static struct ip_reassdata*
+ip_reass_enqueue_new_datagram(struct ip_hdr *fraghdr, int clen)
+{
+  struct ip_reassdata* ipr;
+  /* No matching previous fragment found, allocate a new reassdata struct */
+  ipr = memp_malloc(MEMP_REASSDATA);
+  if (ipr == NULL) {
+#if IP_REASS_FREE_OLDEST
+    if (ip_reass_remove_oldest_datagram(fraghdr, clen) >= clen) {
+      ipr = memp_malloc(MEMP_REASSDATA);
+    }
+    if (ipr == NULL)
+#endif /* IP_REASS_FREE_OLDEST */
+    {
+      IPFRAG_STATS_INC(ip_frag.memerr);
+      LWIP_DEBUGF(IP_REASS_DEBUG,("Failed to alloc reassdata struct\n"));
+      return NULL;
+    }
+  }
+  memset(ipr, 0, sizeof(struct ip_reassdata));
+  ipr->timer = IP_REASS_MAXAGE;
+
+  /* enqueue the new structure to the front of the list */
+  ipr->next = reassdatagrams;
+  reassdatagrams = ipr;
+  /* copy the ip header for later tests and input */
+  /* @todo: no ip options supported? */
+  SMEMCPY(&(ipr->iphdr), fraghdr, IP_HLEN);
+  return ipr;
+}
+
+/**
+ * Dequeues a datagram from the datagram queue. Doesn't deallocate the pbufs.
+ * @param ipr points to the queue entry to dequeue
+ */
+static void
+ip_reass_dequeue_datagram(struct ip_reassdata *ipr, struct ip_reassdata *prev)
+{
+  
+  /* dequeue the reass struct  */
+  if (reassdatagrams == ipr) {
+    /* it was the first in the list */
+    reassdatagrams = ipr->next;
+  } else {
+    /* it wasn't the first, so it must have a valid 'prev' */
+    LWIP_ASSERT("sanity check linked list", prev != NULL);
+    prev->next = ipr->next;
+  }
+
+  /* now we can free the ip_reass struct */
+  memp_free(MEMP_REASSDATA, ipr);
+}
+
+/**
+ * Chain a new pbuf into the pbuf list that composes the datagram.  The pbuf list
+ * will grow over time as  new pbufs are rx.
+ * Also checks that the datagram passes basic continuity checks (if the last
+ * fragment was received at least once).
+ * @param root_p points to the 'root' pbuf for the current datagram being assembled.
+ * @param new_p points to the pbuf for the current fragment
+ * @return 0 if invalid, >0 otherwise
+ */
+static int
+ip_reass_chain_frag_into_datagram_and_validate(struct ip_reassdata *ipr, struct pbuf *new_p)
+{
+  struct ip_reass_helper *iprh, *iprh_tmp, *iprh_prev=NULL;
+  struct pbuf *q;
+  u16_t offset,len;
+  struct ip_hdr *fraghdr;
+  int valid = 1;
+
+  /* Extract length and fragment offset from current fragment */
+  fraghdr = (struct ip_hdr*)new_p->payload; 
+  len = ntohs(IPH_LEN(fraghdr)) - IPH_HL(fraghdr) * 4;
+  offset = (ntohs(IPH_OFFSET(fraghdr)) & IP_OFFMASK) * 8;
+
+  /* overwrite the fragment's ip header from the pbuf with our helper struct,
+   * and setup the embedded helper structure. */
+  /* make sure the struct ip_reass_helper fits into the IP header */
+  LWIP_ASSERT("sizeof(struct ip_reass_helper) <= IP_HLEN",
+              sizeof(struct ip_reass_helper) <= IP_HLEN);
+  iprh = (struct ip_reass_helper*)new_p->payload;
+  iprh->next_pbuf = NULL;
+  iprh->start = offset;
+  iprh->end = offset + len;
+
+  /* Iterate through until we either get to the end of the list (append),
+   * or we find on with a larger offset (insert). */
+  for (q = ipr->p; q != NULL;) {
+    iprh_tmp = (struct ip_reass_helper*)q->payload;
+    if (iprh->start < iprh_tmp->start) {
+      /* the new pbuf should be inserted before this */
+      iprh->next_pbuf = q;
+      if (iprh_prev != NULL) {
+        /* not the fragment with the lowest offset */
+#if IP_REASS_CHECK_OVERLAP
+        if ((iprh->start < iprh_prev->end) || (iprh->end > iprh_tmp->start)) {
+          /* fragment overlaps with previous or following, throw away */
+          goto freepbuf;
+        }
+#endif /* IP_REASS_CHECK_OVERLAP */
+        iprh_prev->next_pbuf = new_p;
+      } else {
+        /* fragment with the lowest offset */
+        ipr->p = new_p;
+      }
+      break;
+    } else if(iprh->start == iprh_tmp->start) {
+      /* received the same datagram twice: no need to keep the datagram */
+      goto freepbuf;
+#if IP_REASS_CHECK_OVERLAP
+    } else if(iprh->start < iprh_tmp->end) {
+      /* overlap: no need to keep the new datagram */
+      goto freepbuf;
+#endif /* IP_REASS_CHECK_OVERLAP */
+    } else {
+      /* Check if the fragments received so far have no wholes. */
+      if (iprh_prev != NULL) {
+        if (iprh_prev->end != iprh_tmp->start) {
+          /* There is a fragment missing between the current
+           * and the previous fragment */
+          valid = 0;
+        }
+      }
+    }
+    q = iprh_tmp->next_pbuf;
+    iprh_prev = iprh_tmp;
+  }
+
+  /* If q is NULL, then we made it to the end of the list. Determine what to do now */
+  if (q == NULL) {
+    if (iprh_prev != NULL) {
+      /* this is (for now), the fragment with the highest offset:
+       * chain it to the last fragment */
+#if IP_REASS_CHECK_OVERLAP
+      LWIP_ASSERT("check fragments don't overlap", iprh_prev->end <= iprh->start);
+#endif /* IP_REASS_CHECK_OVERLAP */
+      iprh_prev->next_pbuf = new_p;
+      if (iprh_prev->end != iprh->start) {
+        valid = 0;
+      }
+    } else {
+#if IP_REASS_CHECK_OVERLAP
+      LWIP_ASSERT("no previous fragment, this must be the first fragment!",
+        ipr->p == NULL);
+#endif /* IP_REASS_CHECK_OVERLAP */
+      /* this is the first fragment we ever received for this ip datagram */
+      ipr->p = new_p;
+    }
+  }
+
+  /* At this point, the validation part begins: */
+  /* If we already received the last fragment */
+  if ((ipr->flags & IP_REASS_FLAG_LASTFRAG) != 0) {
+    /* and had no wholes so far */
+    if (valid) {
+      /* then check if the rest of the fragments is here */
+      /* Check if the queue starts with the first datagram */
+      if (((struct ip_reass_helper*)ipr->p->payload)->start != 0) {
+        valid = 0;
+      } else {
+        /* and check that there are no wholes after this datagram */
+        iprh_prev = iprh;
+        q = iprh->next_pbuf;
+        while (q != NULL) {
+          iprh = (struct ip_reass_helper*)q->payload;
+          if (iprh_prev->end != iprh->start) {
+            valid = 0;
+            break;
+          }
+          iprh_prev = iprh;
+          q = iprh->next_pbuf;
+        }
+        /* if still valid, all fragments are received
+         * (because to the MF==0 already arrived */
+        if (valid) {
+          LWIP_ASSERT("sanity check", ipr->p != NULL);
+          LWIP_ASSERT("sanity check",
+            ((struct ip_reass_helper*)ipr->p->payload) != iprh);
+          LWIP_ASSERT("validate_datagram:next_pbuf!=NULL",
+            iprh->next_pbuf == NULL);
+          LWIP_ASSERT("validate_datagram:datagram end!=datagram len",
+            iprh->end == ipr->datagram_len);
+        }
+      }
+    }
+    /* If valid is 0 here, there are some fragments missing in the middle
+     * (since MF == 0 has already arrived). Such datagrams simply time out if
+     * no more fragments are received... */
+    return valid;
+  }
+  /* If we come here, not all fragments were received, yet! */
+  return 0; /* not yet valid! */
+#if IP_REASS_CHECK_OVERLAP
+freepbuf:
+  ip_reass_pbufcount -= pbuf_clen(new_p);
+  pbuf_free(new_p);
+  return 0;
+#endif /* IP_REASS_CHECK_OVERLAP */
+}
+
+/**
+ * Reassembles incoming IP fragments into an IP datagram.
+ *
+ * @param p points to a pbuf chain of the fragment
+ * @return NULL if reassembly is incomplete, ? otherwise
+ */
+struct pbuf *
+ip_reass(struct pbuf *p)
+{
+  struct pbuf *r;
+  struct ip_hdr *fraghdr;
+  struct ip_reassdata *ipr;
+  struct ip_reass_helper *iprh;
+  u16_t offset, len;
+  u8_t clen;
+  struct ip_reassdata *ipr_prev = NULL;
+
+  IPFRAG_STATS_INC(ip_frag.recv);
+  snmp_inc_ipreasmreqds();
+
+  fraghdr = (struct ip_hdr*)p->payload;
+
+  if ((IPH_HL(fraghdr) * 4) != IP_HLEN) {
+    LWIP_DEBUGF(IP_REASS_DEBUG,("ip_reass: IP options currently not supported!\n"));
+    IPFRAG_STATS_INC(ip_frag.err);
+    goto nullreturn;
+  }
+
+  offset = (ntohs(IPH_OFFSET(fraghdr)) & IP_OFFMASK) * 8;
+  len = ntohs(IPH_LEN(fraghdr)) - IPH_HL(fraghdr) * 4;
+
+  /* Check if we are allowed to enqueue more datagrams. */
+  clen = pbuf_clen(p);
+  if ((ip_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS) {
+#if IP_REASS_FREE_OLDEST
+    if (!ip_reass_remove_oldest_datagram(fraghdr, clen) ||
+        ((ip_reass_pbufcount + clen) > IP_REASS_MAX_PBUFS))
+#endif /* IP_REASS_FREE_OLDEST */
+    {
+      /* No datagram could be freed and still too many pbufs enqueued */
+      LWIP_DEBUGF(IP_REASS_DEBUG,("ip_reass: Overflow condition: pbufct=%d, clen=%d, MAX=%d\n",
+        ip_reass_pbufcount, clen, IP_REASS_MAX_PBUFS));
+      IPFRAG_STATS_INC(ip_frag.memerr);
+      /* @todo: send ICMP time exceeded here? */
+      /* drop this pbuf */
+      goto nullreturn;
+    }
+  }
+
+  /* Look for the datagram the fragment belongs to in the current datagram queue,
+   * remembering the previous in the queue for later dequeueing. */
+  for (ipr = reassdatagrams; ipr != NULL; ipr = ipr->next) {
+    /* Check if the incoming fragment matches the one currently present
+       in the reassembly buffer. If so, we proceed with copying the
+       fragment into the buffer. */
+    if (IP_ADDRESSES_AND_ID_MATCH(&ipr->iphdr, fraghdr)) {
+      LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_reass: matching previous fragment ID=%"X16_F"\n",
+        ntohs(IPH_ID(fraghdr))));
+      IPFRAG_STATS_INC(ip_frag.cachehit);
+      break;
+    }
+    ipr_prev = ipr;
+  }
+
+  if (ipr == NULL) {
+  /* Enqueue a new datagram into the datagram queue */
+    ipr = ip_reass_enqueue_new_datagram(fraghdr, clen);
+    /* Bail if unable to enqueue */
+    if(ipr == NULL) {
+      goto nullreturn;
+    }
+  } else {
+    if (((ntohs(IPH_OFFSET(fraghdr)) & IP_OFFMASK) == 0) && 
+      ((ntohs(IPH_OFFSET(&ipr->iphdr)) & IP_OFFMASK) != 0)) {
+      /* ipr->iphdr is not the header from the first fragment, but fraghdr is
+       * -> copy fraghdr into ipr->iphdr since we want to have the header
+       * of the first fragment (for ICMP time exceeded and later, for copying
+       * all options, if supported)*/
+      SMEMCPY(&ipr->iphdr, fraghdr, IP_HLEN);
+    }
+  }
+  /* Track the current number of pbufs current 'in-flight', in order to limit 
+  the number of fragments that may be enqueued at any one time */
+  ip_reass_pbufcount += clen;
+
+  /* At this point, we have either created a new entry or pointing 
+   * to an existing one */
+
+  /* check for 'no more fragments', and update queue entry*/
+  if ((ntohs(IPH_OFFSET(fraghdr)) & IP_MF) == 0) {
+    ipr->flags |= IP_REASS_FLAG_LASTFRAG;
+    ipr->datagram_len = offset + len;
+    LWIP_DEBUGF(IP_REASS_DEBUG,
+     ("ip_reass: last fragment seen, total len %"S16_F"\n",
+      ipr->datagram_len));
+  }
+  /* find the right place to insert this pbuf */
+  /* @todo: trim pbufs if fragments are overlapping */
+  if (ip_reass_chain_frag_into_datagram_and_validate(ipr, p)) {
+    /* the totally last fragment (flag more fragments = 0) was received at least
+     * once AND all fragments are received */
+    ipr->datagram_len += IP_HLEN;
+
+    /* save the second pbuf before copying the header over the pointer */
+    r = ((struct ip_reass_helper*)ipr->p->payload)->next_pbuf;
+
+    /* copy the original ip header back to the first pbuf */
+    fraghdr = (struct ip_hdr*)(ipr->p->payload);
+    SMEMCPY(fraghdr, &ipr->iphdr, IP_HLEN);
+    IPH_LEN_SET(fraghdr, htons(ipr->datagram_len));
+    IPH_OFFSET_SET(fraghdr, 0);
+    IPH_CHKSUM_SET(fraghdr, 0);
+    /* @todo: do we need to set calculate the correct checksum? */
+    IPH_CHKSUM_SET(fraghdr, inet_chksum(fraghdr, IP_HLEN));
+
+    p = ipr->p;
+
+    /* chain together the pbufs contained within the reass_data list. */
+    while(r != NULL) {
+      iprh = (struct ip_reass_helper*)r->payload;
+
+      /* hide the ip header for every succeding fragment */
+      pbuf_header(r, -IP_HLEN);
+      pbuf_cat(p, r);
+      r = iprh->next_pbuf;
+    }
+    /* release the sources allocate for the fragment queue entry */
+    ip_reass_dequeue_datagram(ipr, ipr_prev);
+
+    /* and adjust the number of pbufs currently queued for reassembly. */
+    ip_reass_pbufcount -= pbuf_clen(p);
+
+    /* Return the pbuf chain */
+    return p;
+  }
+  /* the datagram is not (yet?) reassembled completely */
+  LWIP_DEBUGF(IP_REASS_DEBUG,("ip_reass_pbufcount: %d out\n", ip_reass_pbufcount));
+  return NULL;
+
+nullreturn:
+  LWIP_DEBUGF(IP_REASS_DEBUG,("ip_reass: nullreturn\n"));
+  IPFRAG_STATS_INC(ip_frag.drop);
+  pbuf_free(p);
+  return NULL;
+}
+#endif /* IP_REASSEMBLY */
+
+#if IP_FRAG
+#if IP_FRAG_USES_STATIC_BUF
+static u8_t buf[LWIP_MEM_ALIGN_SIZE(IP_FRAG_MAX_MTU + MEM_ALIGNMENT - 1)];
+#endif /* IP_FRAG_USES_STATIC_BUF */
+
+/**
+ * Fragment an IP datagram if too large for the netif.
+ *
+ * Chop the datagram in MTU sized chunks and send them in order
+ * by using a fixed size static memory buffer (PBUF_REF) or
+ * point PBUF_REFs into p (depending on IP_FRAG_USES_STATIC_BUF).
+ *
+ * @param p ip packet to send
+ * @param netif the netif on which to send
+ * @param dest destination ip address to which to send
+ *
+ * @return ERR_OK if sent successfully, err_t otherwise
+ */
+err_t 
+ip_frag(struct pbuf *p, struct netif *netif, struct ip_addr *dest)
+{
+  struct pbuf *rambuf;
+#if IP_FRAG_USES_STATIC_BUF
+  struct pbuf *header;
+#else
+  struct pbuf *newpbuf;
+  struct ip_hdr *original_iphdr;
+#endif
+  struct ip_hdr *iphdr;
+  u16_t nfb;
+  u16_t left, cop;
+  u16_t mtu = netif->mtu;
+  u16_t ofo, omf;
+  u16_t last;
+  u16_t poff = IP_HLEN;
+  u16_t tmp;
+#if !IP_FRAG_USES_STATIC_BUF
+  u16_t newpbuflen = 0;
+  u16_t left_to_copy;
+#endif
+
+  /* Get a RAM based MTU sized pbuf */
+#if IP_FRAG_USES_STATIC_BUF
+  /* When using a static buffer, we use a PBUF_REF, which we will
+   * use to reference the packet (without link header).
+   * Layer and length is irrelevant.
+   */
+  rambuf = pbuf_alloc(PBUF_LINK, 0, PBUF_REF);
+  if (rambuf == NULL) {
+    LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc(PBUF_LINK, 0, PBUF_REF) failed\n"));
+    return ERR_MEM;
+  }
+  rambuf->tot_len = rambuf->len = mtu;
+  rambuf->payload = LWIP_MEM_ALIGN((void *)buf);
+
+  /* Copy the IP header in it */
+  iphdr = rambuf->payload;
+  SMEMCPY(iphdr, p->payload, IP_HLEN);
+#else /* IP_FRAG_USES_STATIC_BUF */
+  original_iphdr = p->payload;
+  iphdr = original_iphdr;
+#endif /* IP_FRAG_USES_STATIC_BUF */
+
+  /* Save original offset */
+  tmp = ntohs(IPH_OFFSET(iphdr));
+  ofo = tmp & IP_OFFMASK;
+  omf = tmp & IP_MF;
+
+  left = p->tot_len - IP_HLEN;
+
+  nfb = (mtu - IP_HLEN) / 8;
+
+  while (left) {
+    last = (left <= mtu - IP_HLEN);
+
+    /* Set new offset and MF flag */
+    tmp = omf | (IP_OFFMASK & (ofo));
+    if (!last)
+      tmp = tmp | IP_MF;
+
+    /* Fill this fragment */
+    cop = last ? left : nfb * 8;
+
+#if IP_FRAG_USES_STATIC_BUF
+    poff += pbuf_copy_partial(p, (u8_t*)iphdr + IP_HLEN, cop, poff);
+#else /* IP_FRAG_USES_STATIC_BUF */
+    /* When not using a static buffer, create a chain of pbufs.
+     * The first will be a PBUF_RAM holding the link and IP header.
+     * The rest will be PBUF_REFs mirroring the pbuf chain to be fragged,
+     * but limited to the size of an mtu.
+     */
+    rambuf = pbuf_alloc(PBUF_LINK, IP_HLEN, PBUF_RAM);
+    if (rambuf == NULL) {
+      return ERR_MEM;
+    }
+    LWIP_ASSERT("this needs a pbuf in one piece!",
+                (p->len >= (IP_HLEN)));
+    SMEMCPY(rambuf->payload, original_iphdr, IP_HLEN);
+    iphdr = rambuf->payload;
+
+    /* Can just adjust p directly for needed offset. */
+    p->payload = (u8_t *)p->payload + poff;
+    p->len -= poff;
+
+    left_to_copy = cop;
+    while (left_to_copy) {
+      newpbuflen = (left_to_copy < p->len) ? left_to_copy : p->len;
+      /* Is this pbuf already empty? */
+      if (!newpbuflen) {
+        p = p->next;
+        continue;
+      }
+      newpbuf = pbuf_alloc(PBUF_RAW, 0, PBUF_REF);
+      if (newpbuf == NULL) {
+        pbuf_free(rambuf);
+        return ERR_MEM;
+      }
+      /* Mirror this pbuf, although we might not need all of it. */
+      newpbuf->payload = p->payload;
+      newpbuf->len = newpbuf->tot_len = newpbuflen;
+      /* Add it to end of rambuf's chain, but using pbuf_cat, not pbuf_chain
+       * so that it is removed when pbuf_dechain is later called on rambuf.
+       */
+      pbuf_cat(rambuf, newpbuf);
+      left_to_copy -= newpbuflen;
+      if (left_to_copy)
+        p = p->next;
+    }
+    poff = newpbuflen;
+#endif /* IP_FRAG_USES_STATIC_BUF */
+
+    /* Correct header */
+    IPH_OFFSET_SET(iphdr, htons(tmp));
+    IPH_LEN_SET(iphdr, htons(cop + IP_HLEN));
+    IPH_CHKSUM_SET(iphdr, 0);
+    IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
+
+#if IP_FRAG_USES_STATIC_BUF
+    if (last)
+      pbuf_realloc(rambuf, left + IP_HLEN);
+
+    /* This part is ugly: we alloc a RAM based pbuf for 
+     * the link level header for each chunk and then 
+     * free it.A PBUF_ROM style pbuf for which pbuf_header
+     * worked would make things simpler.
+     */
+    header = pbuf_alloc(PBUF_LINK, 0, PBUF_RAM);
+    if (header != NULL) {
+      pbuf_chain(header, rambuf);
+      netif->output(netif, header, dest);
+      IPFRAG_STATS_INC(ip_frag.xmit);
+      snmp_inc_ipfragcreates();
+      pbuf_free(header);
+    } else {
+      LWIP_DEBUGF(IP_REASS_DEBUG, ("ip_frag: pbuf_alloc() for header failed\n"));
+      pbuf_free(rambuf);
+      return ERR_MEM;
+    }
+#else /* IP_FRAG_USES_STATIC_BUF */
+    /* No need for separate header pbuf - we allowed room for it in rambuf
+     * when allocated.
+     */
+    netif->output(netif, rambuf, dest);
+    IPFRAG_STATS_INC(ip_frag.xmit);
+
+    /* Unfortunately we can't reuse rambuf - the hardware may still be
+     * using the buffer. Instead we free it (and the ensuing chain) and
+     * recreate it next time round the loop. If we're lucky the hardware
+     * will have already sent the packet, the free will really free, and
+     * there will be zero memory penalty.
+     */
+    
+    pbuf_free(rambuf);
+#endif /* IP_FRAG_USES_STATIC_BUF */
+    left -= cop;
+    ofo += nfb;
+  }
+#if IP_FRAG_USES_STATIC_BUF
+  pbuf_free(rambuf);
+#endif /* IP_FRAG_USES_STATIC_BUF */
+  snmp_inc_ipfragoks();
+  return ERR_OK;
+}
+#endif /* IP_FRAG */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/README b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/README
new file mode 100644
index 000000000..362000486
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/README
@@ -0,0 +1 @@
+IPv6 support in lwIP is very experimental.
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/icmp6.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/icmp6.c
new file mode 100644
index 000000000..4fcc89551
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/icmp6.c
@@ -0,0 +1,179 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/* Some ICMP messages should be passed to the transport protocols. This
+   is not implemented. */
+
+#include "lwip/opt.h"
+
+#if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/icmp.h"
+#include "lwip/inet.h"
+#include "lwip/ip.h"
+#include "lwip/def.h"
+#include "lwip/stats.h"
+
+void
+icmp_input(struct pbuf *p, struct netif *inp)
+{
+  u8_t type;
+  struct icmp_echo_hdr *iecho;
+  struct ip_hdr *iphdr;
+  struct ip_addr tmpaddr;
+
+  ICMP_STATS_INC(icmp.recv);
+
+  /* TODO: check length before accessing payload! */
+
+  type = ((u8_t *)p->payload)[0];
+
+  switch (type) {
+  case ICMP6_ECHO:
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ping\n"));
+
+    if (p->tot_len < sizeof(struct icmp_echo_hdr)) {
+      LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: bad ICMP echo received\n"));
+
+      pbuf_free(p);
+      ICMP_STATS_INC(icmp.lenerr);
+      return;
+    }
+    iecho = p->payload;
+    iphdr = (struct ip_hdr *)((u8_t *)p->payload - IP_HLEN);
+    if (inet_chksum_pbuf(p) != 0) {
+      LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo (%"X16_F")\n", inet_chksum_pseudo(p, &(iphdr->src), &(iphdr->dest), IP_PROTO_ICMP, p->tot_len)));
+      ICMP_STATS_INC(icmp.chkerr);
+    /*      return;*/
+    }
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp: p->len %"S16_F" p->tot_len %"S16_F"\n", p->len, p->tot_len));
+    ip_addr_set(&tmpaddr, &(iphdr->src));
+    ip_addr_set(&(iphdr->src), &(iphdr->dest));
+    ip_addr_set(&(iphdr->dest), &tmpaddr);
+    iecho->type = ICMP6_ER;
+    /* adjust the checksum */
+    if (iecho->chksum >= htons(0xffff - (ICMP6_ECHO << 8))) {
+      iecho->chksum += htons(ICMP6_ECHO << 8) + 1;
+    } else {
+      iecho->chksum += htons(ICMP6_ECHO << 8);
+    }
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: checksum failed for received ICMP echo (%"X16_F")\n", inet_chksum_pseudo(p, &(iphdr->src), &(iphdr->dest), IP_PROTO_ICMP, p->tot_len)));
+    ICMP_STATS_INC(icmp.xmit);
+
+    /*    LWIP_DEBUGF("icmp: p->len %"U16_F" p->tot_len %"U16_F"\n", p->len, p->tot_len);*/
+    ip_output_if (p, &(iphdr->src), IP_HDRINCL,
+     iphdr->hoplim, IP_PROTO_ICMP, inp);
+    break;
+  default:
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_input: ICMP type %"S16_F" not supported.\n", (s16_t)type));
+    ICMP_STATS_INC(icmp.proterr);
+    ICMP_STATS_INC(icmp.drop);
+  }
+
+  pbuf_free(p);
+}
+
+void
+icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t)
+{
+  struct pbuf *q;
+  struct ip_hdr *iphdr;
+  struct icmp_dur_hdr *idur;
+
+  /* @todo: can this be PBUF_LINK instead of PBUF_IP? */
+  q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);
+  /* ICMP header + IP header + 8 bytes of data */
+  if (q == NULL) {
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_dest_unreach: failed to allocate pbuf for ICMP packet.\n"));
+    pbuf_free(p);
+    return;
+  }
+  LWIP_ASSERT("check that first pbuf can hold icmp message",
+             (q->len >= (8 + IP_HLEN + 8)));
+
+  iphdr = p->payload;
+
+  idur = q->payload;
+  idur->type = (u8_t)ICMP6_DUR;
+  idur->icode = (u8_t)t;
+
+  SMEMCPY((u8_t *)q->payload + 8, p->payload, IP_HLEN + 8);
+
+  /* calculate checksum */
+  idur->chksum = 0;
+  idur->chksum = inet_chksum(idur, q->len);
+  ICMP_STATS_INC(icmp.xmit);
+
+  ip_output(q, NULL,
+      (struct ip_addr *)&(iphdr->src), ICMP_TTL, IP_PROTO_ICMP);
+  pbuf_free(q);
+}
+
+void
+icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t)
+{
+  struct pbuf *q;
+  struct ip_hdr *iphdr;
+  struct icmp_te_hdr *tehdr;
+
+  LWIP_DEBUGF(ICMP_DEBUG, ("icmp_time_exceeded\n"));
+
+  /* @todo: can this be PBUF_LINK instead of PBUF_IP? */
+  q = pbuf_alloc(PBUF_IP, 8 + IP_HLEN + 8, PBUF_RAM);
+  /* ICMP header + IP header + 8 bytes of data */
+  if (q == NULL) {
+    LWIP_DEBUGF(ICMP_DEBUG, ("icmp_dest_unreach: failed to allocate pbuf for ICMP packet.\n"));
+    pbuf_free(p);
+    return;
+  }
+  LWIP_ASSERT("check that first pbuf can hold icmp message",
+             (q->len >= (8 + IP_HLEN + 8)));
+
+  iphdr = p->payload;
+
+  tehdr = q->payload;
+  tehdr->type = (u8_t)ICMP6_TE;
+  tehdr->icode = (u8_t)t;
+
+  /* copy fields from original packet */
+  SMEMCPY((u8_t *)q->payload + 8, (u8_t *)p->payload, IP_HLEN + 8);
+
+  /* calculate checksum */
+  tehdr->chksum = 0;
+  tehdr->chksum = inet_chksum(tehdr, q->len);
+  ICMP_STATS_INC(icmp.xmit);
+  ip_output(q, NULL,
+      (struct ip_addr *)&(iphdr->src), ICMP_TTL, IP_PROTO_ICMP);
+  pbuf_free(q);
+}
+
+#endif /* LWIP_ICMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/inet6.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/inet6.c
new file mode 100644
index 000000000..c3de85c09
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/inet6.c
@@ -0,0 +1,163 @@
+/**
+ * @file
+ * Functions common to all TCP/IPv6 modules, such as the Internet checksum and the
+ * byte order functions.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/def.h"
+#include "lwip/inet.h"
+
+/* chksum:
+ *
+ * Sums up all 16 bit words in a memory portion. Also includes any odd byte.
+ * This function is used by the other checksum functions.
+ *
+ * For now, this is not optimized. Must be optimized for the particular processor
+ * arcitecture on which it is to run. Preferebly coded in assembler.
+ */
+
+static u32_t
+chksum(void *dataptr, u16_t len)
+{
+  u16_t *sdataptr = dataptr;
+  u32_t acc;
+  
+  
+  for(acc = 0; len > 1; len -= 2) {
+    acc += *sdataptr++;
+  }
+
+  /* add up any odd byte */
+  if (len == 1) {
+    acc += htons((u16_t)(*(u8_t *)dataptr) << 8);
+  }
+
+  return acc;
+
+}
+
+/* inet_chksum_pseudo:
+ *
+ * Calculates the pseudo Internet checksum used by TCP and UDP for a pbuf chain.
+ */
+
+u16_t
+inet_chksum_pseudo(struct pbuf *p,
+       struct ip_addr *src, struct ip_addr *dest,
+       u8_t proto, u32_t proto_len)
+{
+  u32_t acc;
+  struct pbuf *q;
+  u8_t swapped, i;
+
+  acc = 0;
+  swapped = 0;
+  for(q = p; q != NULL; q = q->next) {    
+    acc += chksum(q->payload, q->len);
+    while (acc >> 16) {
+      acc = (acc & 0xffff) + (acc >> 16);
+    }
+    if (q->len % 2 != 0) {
+      swapped = 1 - swapped;
+      acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
+    }
+  }
+
+  if (swapped) {
+    acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
+  }
+  
+  for(i = 0; i < 8; i++) {
+    acc += ((u16_t *)src->addr)[i] & 0xffff;
+    acc += ((u16_t *)dest->addr)[i] & 0xffff;
+    while (acc >> 16) {
+      acc = (acc & 0xffff) + (acc >> 16);
+    }
+  }
+  acc += (u16_t)htons((u16_t)proto);
+  acc += ((u16_t *)&proto_len)[0] & 0xffff;
+  acc += ((u16_t *)&proto_len)[1] & 0xffff;
+
+  while (acc >> 16) {
+    acc = (acc & 0xffff) + (acc >> 16);
+  }
+  return ~(acc & 0xffff);
+}
+
+/* inet_chksum:
+ *
+ * Calculates the Internet checksum over a portion of memory. Used primarely for IP
+ * and ICMP.
+ */
+
+u16_t
+inet_chksum(void *dataptr, u16_t len)
+{
+  u32_t acc, sum;
+
+  acc = chksum(dataptr, len);
+  sum = (acc & 0xffff) + (acc >> 16);
+  sum += (sum >> 16);
+  return ~(sum & 0xffff);
+}
+
+u16_t
+inet_chksum_pbuf(struct pbuf *p)
+{
+  u32_t acc;
+  struct pbuf *q;
+  u8_t swapped;
+  
+  acc = 0;
+  swapped = 0;
+  for(q = p; q != NULL; q = q->next) {
+    acc += chksum(q->payload, q->len);
+    while (acc >> 16) {
+      acc = (acc & 0xffff) + (acc >> 16);
+    }    
+    if (q->len % 2 != 0) {
+      swapped = 1 - swapped;
+      acc = (acc & 0xff << 8) | (acc & 0xff00 >> 8);
+    }
+  }
+ 
+  if (swapped) {
+    acc = ((acc & 0xff) << 8) | ((acc & 0xff00) >> 8);
+  }
+  return ~(acc & 0xffff);
+}
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/ip6.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/ip6.c
new file mode 100644
index 000000000..7e4342001
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/ip6.c
@@ -0,0 +1,397 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+
+
+/* ip.c
+ *
+ * This is the code for the IP layer for IPv6.
+ *
+ */
+
+
+#include "lwip/opt.h"
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/ip.h"
+#include "lwip/inet.h"
+#include "lwip/netif.h"
+#include "lwip/icmp.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+
+#include "lwip/stats.h"
+
+#include "arch/perf.h"
+
+/* ip_init:
+ *
+ * Initializes the IP layer.
+ */
+
+void
+ip_init(void)
+{
+}
+
+/* ip_route:
+ *
+ * Finds the appropriate network interface for a given IP address. It searches the
+ * list of network interfaces linearly. A match is found if the masked IP address of
+ * the network interface equals the masked IP address given to the function.
+ */
+
+struct netif *
+ip_route(struct ip_addr *dest)
+{
+  struct netif *netif;
+
+  for(netif = netif_list; netif != NULL; netif = netif->next) {
+    if (ip_addr_netcmp(dest, &(netif->ip_addr), &(netif->netmask))) {
+      return netif;
+    }
+  }
+
+  return netif_default;
+}
+
+/* ip_forward:
+ *
+ * Forwards an IP packet. It finds an appropriate route for the packet, decrements
+ * the TTL value of the packet, adjusts the checksum and outputs the packet on the
+ * appropriate interface.
+ */
+
+static void
+ip_forward(struct pbuf *p, struct ip_hdr *iphdr)
+{
+  struct netif *netif;
+
+  PERF_START;
+
+  if ((netif = ip_route((struct ip_addr *)&(iphdr->dest))) == NULL) {
+
+    LWIP_DEBUGF(IP_DEBUG, ("ip_input: no forwarding route found for "));
+#if IP_DEBUG
+    ip_addr_debug_print(IP_DEBUG, ((struct ip_addr *)&(iphdr->dest)));
+#endif /* IP_DEBUG */
+    LWIP_DEBUGF(IP_DEBUG, ("\n"));
+    pbuf_free(p);
+    return;
+  }
+  /* Decrement TTL and send ICMP if ttl == 0. */
+  if (--iphdr->hoplim == 0) {
+#if LWIP_ICMP
+    /* Don't send ICMP messages in response to ICMP messages */
+    if (iphdr->nexthdr != IP_PROTO_ICMP) {
+      icmp_time_exceeded(p, ICMP_TE_TTL);
+    }
+#endif /* LWIP_ICMP */
+    pbuf_free(p);
+    return;
+  }
+
+  /* Incremental update of the IP checksum. */
+  /*  if (iphdr->chksum >= htons(0xffff - 0x100)) {
+    iphdr->chksum += htons(0x100) + 1;
+  } else {
+    iphdr->chksum += htons(0x100);
+    }*/
+
+
+  LWIP_DEBUGF(IP_DEBUG, ("ip_forward: forwarding packet to "));
+#if IP_DEBUG
+  ip_addr_debug_print(IP_DEBUG, ((struct ip_addr *)&(iphdr->dest)));
+#endif /* IP_DEBUG */
+  LWIP_DEBUGF(IP_DEBUG, ("\n"));
+
+  IP_STATS_INC(ip.fw);
+  IP_STATS_INC(ip.xmit);
+
+  PERF_STOP("ip_forward");
+
+  netif->output(netif, p, (struct ip_addr *)&(iphdr->dest));
+}
+
+/* ip_input:
+ *
+ * This function is called by the network interface device driver when an IP packet is
+ * received. The function does the basic checks of the IP header such as packet size
+ * being at least larger than the header size etc. If the packet was not destined for
+ * us, the packet is forwarded (using ip_forward). The IP checksum is always checked.
+ *
+ * Finally, the packet is sent to the upper layer protocol input function.
+ */
+
+void
+ip_input(struct pbuf *p, struct netif *inp) {
+  struct ip_hdr *iphdr;
+  struct netif *netif;
+
+
+  PERF_START;
+
+#if IP_DEBUG
+  ip_debug_print(p);
+#endif /* IP_DEBUG */
+
+
+  IP_STATS_INC(ip.recv);
+
+  /* identify the IP header */
+  iphdr = p->payload;
+
+
+  if (iphdr->v != 6) {
+    LWIP_DEBUGF(IP_DEBUG, ("IP packet dropped due to bad version number\n"));
+#if IP_DEBUG
+    ip_debug_print(p);
+#endif /* IP_DEBUG */
+    pbuf_free(p);
+    IP_STATS_INC(ip.err);
+    IP_STATS_INC(ip.drop);
+    return;
+  }
+
+  /* is this packet for us? */
+  for(netif = netif_list; netif != NULL; netif = netif->next) {
+#if IP_DEBUG
+    LWIP_DEBUGF(IP_DEBUG, ("ip_input: iphdr->dest "));
+    ip_addr_debug_print(IP_DEBUG, ((struct ip_addr *)&(iphdr->dest)));
+    LWIP_DEBUGF(IP_DEBUG, ("netif->ip_addr "));
+    ip_addr_debug_print(IP_DEBUG, ((struct ip_addr *)&(iphdr->dest)));
+    LWIP_DEBUGF(IP_DEBUG, ("\n"));
+#endif /* IP_DEBUG */
+    if (ip_addr_cmp(&(iphdr->dest), &(netif->ip_addr))) {
+      break;
+    }
+  }
+
+
+  if (netif == NULL) {
+    /* packet not for us, route or discard */
+#if IP_FORWARD
+    ip_forward(p, iphdr);
+#endif
+    pbuf_free(p);
+    return;
+  }
+
+  pbuf_realloc(p, IP_HLEN + ntohs(iphdr->len));
+
+  /* send to upper layers */
+#if IP_DEBUG
+  /*  LWIP_DEBUGF("ip_input: \n");
+  ip_debug_print(p);
+  LWIP_DEBUGF("ip_input: p->len %"U16_F" p->tot_len %"U16_F"\n", p->len, p->tot_len);*/
+#endif /* IP_DEBUG */
+
+  if(pbuf_header(p, -IP_HLEN)) {
+    LWIP_ASSERT("Can't move over header in packet", 0);
+    return;
+  }
+
+  switch (iphdr->nexthdr) {
+  case IP_PROTO_UDP:
+    udp_input(p, inp);
+    break;
+  case IP_PROTO_TCP:
+    tcp_input(p, inp);
+    break;
+#if LWIP_ICMP
+  case IP_PROTO_ICMP:
+    icmp_input(p, inp);
+    break;
+#endif /* LWIP_ICMP */
+  default:
+#if LWIP_ICMP
+    /* send ICMP destination protocol unreachable */
+    icmp_dest_unreach(p, ICMP_DUR_PROTO);
+#endif /* LWIP_ICMP */
+    pbuf_free(p);
+    LWIP_DEBUGF(IP_DEBUG, ("Unsupported transport protocol %"U16_F"\n",
+          iphdr->nexthdr));
+
+    IP_STATS_INC(ip.proterr);
+    IP_STATS_INC(ip.drop);
+  }
+  PERF_STOP("ip_input");
+}
+
+
+/* ip_output_if:
+ *
+ * Sends an IP packet on a network interface. This function constructs the IP header
+ * and calculates the IP header checksum. If the source IP address is NULL,
+ * the IP address of the outgoing network interface is filled in as source address.
+ */
+
+err_t
+ip_output_if (struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+       u8_t ttl,
+       u8_t proto, struct netif *netif)
+{
+  struct ip_hdr *iphdr;
+
+  PERF_START;
+
+  LWIP_DEBUGF(IP_DEBUG, ("len %"U16_F" tot_len %"U16_F"\n", p->len, p->tot_len));
+  if (pbuf_header(p, IP_HLEN)) {
+    LWIP_DEBUGF(IP_DEBUG, ("ip_output: not enough room for IP header in pbuf\n"));
+    IP_STATS_INC(ip.err);
+
+    return ERR_BUF;
+  }
+  LWIP_DEBUGF(IP_DEBUG, ("len %"U16_F" tot_len %"U16_F"\n", p->len, p->tot_len));
+
+  iphdr = p->payload;
+
+
+  if (dest != IP_HDRINCL) {
+    LWIP_DEBUGF(IP_DEBUG, ("!IP_HDRLINCL\n"));
+    iphdr->hoplim = ttl;
+    iphdr->nexthdr = proto;
+    iphdr->len = htons(p->tot_len - IP_HLEN);
+    ip_addr_set(&(iphdr->dest), dest);
+
+    iphdr->v = 6;
+
+    if (ip_addr_isany(src)) {
+      ip_addr_set(&(iphdr->src), &(netif->ip_addr));
+    } else {
+      ip_addr_set(&(iphdr->src), src);
+    }
+
+  } else {
+    dest = &(iphdr->dest);
+  }
+
+  IP_STATS_INC(ip.xmit);
+
+  LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c (len %"U16_F")\n", netif->name[0], netif->name[1], p->tot_len));
+#if IP_DEBUG
+  ip_debug_print(p);
+#endif /* IP_DEBUG */
+
+  PERF_STOP("ip_output_if");
+  return netif->output(netif, p, dest);
+}
+
+/* ip_output:
+ *
+ * Simple interface to ip_output_if. It finds the outgoing network interface and
+ * calls upon ip_output_if to do the actual work.
+ */
+
+err_t
+ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+    u8_t ttl, u8_t proto)
+{
+  struct netif *netif;
+  if ((netif = ip_route(dest)) == NULL) {
+    LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to 0x%"X32_F"\n", dest->addr));
+    IP_STATS_INC(ip.rterr);
+    return ERR_RTE;
+  }
+
+  return ip_output_if (p, src, dest, ttl, proto, netif);
+}
+
+#if LWIP_NETIF_HWADDRHINT
+err_t
+ip_output_hinted(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+          u8_t ttl, u8_t tos, u8_t proto, u8_t *addr_hint)
+{
+  struct netif *netif;
+  err_t err;
+
+  if ((netif = ip_route(dest)) == NULL) {
+    LWIP_DEBUGF(IP_DEBUG, ("ip_output: No route to 0x%"X32_F"\n", dest->addr));
+    IP_STATS_INC(ip.rterr);
+    return ERR_RTE;
+  }
+
+  netif->addr_hint = addr_hint;
+  err = ip_output_if(p, src, dest, ttl, tos, proto, netif);
+  netif->addr_hint = NULL;
+
+  return err;
+}
+#endif /* LWIP_NETIF_HWADDRHINT*/
+
+#if IP_DEBUG
+void
+ip_debug_print(struct pbuf *p)
+{
+  struct ip_hdr *iphdr = p->payload;
+
+  LWIP_DEBUGF(IP_DEBUG, ("IP header:\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|%2"S16_F" |  %"X16_F"%"X16_F"  |      %"X16_F"%"X16_F"           | (v, traffic class, flow label)\n",
+        iphdr->v,
+        iphdr->tclass1, iphdr->tclass2,
+        iphdr->flow1, iphdr->flow2));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|    %5"U16_F"      | %2"U16_F"  |  %2"U16_F"   | (len, nexthdr, hoplim)\n",
+        ntohs(iphdr->len),
+        iphdr->nexthdr,
+        iphdr->hoplim));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (src)\n",
+        (ntohl(iphdr->src.addr[0]) >> 16) & 0xffff,
+        ntohl(iphdr->src.addr[0]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (src)\n",
+        (ntohl(iphdr->src.addr[1]) >> 16) & 0xffff,
+        ntohl(iphdr->src.addr[1]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (src)\n",
+        (ntohl(iphdr->src.addr[2]) >> 16) & 0xffff,
+        ntohl(iphdr->src.addr[2]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (src)\n",
+        (ntohl(iphdr->src.addr[3]) >> 16) & 0xffff,
+        ntohl(iphdr->src.addr[3]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (dest)\n",
+        (ntohl(iphdr->dest.addr[0]) >> 16) & 0xffff,
+        ntohl(iphdr->dest.addr[0]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (dest)\n",
+        (ntohl(iphdr->dest.addr[1]) >> 16) & 0xffff,
+        ntohl(iphdr->dest.addr[1]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (dest)\n",
+        (ntohl(iphdr->dest.addr[2]) >> 16) & 0xffff,
+        ntohl(iphdr->dest.addr[2]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("|       %4"X32_F"      |       %4"X32_F"     | (dest)\n",
+        (ntohl(iphdr->dest.addr[3]) >> 16) & 0xffff,
+        ntohl(iphdr->dest.addr[3]) & 0xffff));
+  LWIP_DEBUGF(IP_DEBUG, ("+-------------------------------+\n"));
+}
+#endif /* IP_DEBUG */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/ip6_addr.c b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/ip6_addr.c
new file mode 100644
index 000000000..2da6cea42
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/ipv6/ip6_addr.c
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+#include "lwip/inet.h"
+
+u8_t
+ip_addr_netcmp(struct ip_addr *addr1, struct ip_addr *addr2,
+                struct ip_addr *mask)
+{
+  return((addr1->addr[0] & mask->addr[0]) == (addr2->addr[0] & mask->addr[0]) &&
+         (addr1->addr[1] & mask->addr[1]) == (addr2->addr[1] & mask->addr[1]) &&
+         (addr1->addr[2] & mask->addr[2]) == (addr2->addr[2] & mask->addr[2]) &&
+         (addr1->addr[3] & mask->addr[3]) == (addr2->addr[3] & mask->addr[3]));
+        
+}
+
+u8_t
+ip_addr_cmp(struct ip_addr *addr1, struct ip_addr *addr2)
+{
+  return(addr1->addr[0] == addr2->addr[0] &&
+         addr1->addr[1] == addr2->addr[1] &&
+         addr1->addr[2] == addr2->addr[2] &&
+         addr1->addr[3] == addr2->addr[3]);
+}
+
+void
+ip_addr_set(struct ip_addr *dest, struct ip_addr *src)
+{
+  SMEMCPY(dest, src, sizeof(struct ip_addr));
+  /*  dest->addr[0] = src->addr[0];
+  dest->addr[1] = src->addr[1];
+  dest->addr[2] = src->addr[2];
+  dest->addr[3] = src->addr[3];*/
+}
+
+u8_t
+ip_addr_isany(struct ip_addr *addr)
+{
+  if (addr == NULL) return 1;
+  return((addr->addr[0] | addr->addr[1] | addr->addr[2] | addr->addr[3]) == 0);
+}
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/mem.c b/firmware/x300/lwip/lwip-1.3.1/src/core/mem.c
new file mode 100644
index 000000000..b5f13ab3b
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/mem.c
@@ -0,0 +1,633 @@
+/**
+ * @file
+ * Dynamic memory manager
+ *
+ * This is a lightweight replacement for the standard C library malloc().
+ *
+ * If you want to use the standard C library malloc() instead, define
+ * MEM_LIBC_MALLOC to 1 in your lwipopts.h
+ *
+ * To let mem_malloc() use pools (prevents fragmentation and is much faster than
+ * a heap but might waste some memory), define MEM_USE_POOLS to 1, define
+ * MEM_USE_CUSTOM_POOLS to 1 and create a file "lwippools.h" that includes a list
+ * of pools like this (more pools can be added between _START and _END):
+ *
+ * Define three pools with sizes 256, 512, and 1512 bytes
+ * LWIP_MALLOC_MEMPOOL_START
+ * LWIP_MALLOC_MEMPOOL(20, 256)
+ * LWIP_MALLOC_MEMPOOL(10, 512)
+ * LWIP_MALLOC_MEMPOOL(5, 1512)
+ * LWIP_MALLOC_MEMPOOL_END
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *         Simon Goldschmidt
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if !MEM_LIBC_MALLOC /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/sys.h"
+#include "lwip/stats.h"
+
+#include <string.h>
+
+#if MEM_USE_POOLS
+/* lwIP head implemented with different sized pools */
+
+/**
+ * Allocate memory: determine the smallest pool that is big enough
+ * to contain an element of 'size' and get an element from that pool.
+ *
+ * @param size the size in bytes of the memory needed
+ * @return a pointer to the allocated memory or NULL if the pool is empty
+ */
+void *
+mem_malloc(mem_size_t size)
+{
+  struct memp_malloc_helper *element;
+  memp_t poolnr;
+  mem_size_t required_size = size + sizeof(struct memp_malloc_helper);
+
+  for (poolnr = MEMP_POOL_FIRST; poolnr <= MEMP_POOL_LAST; poolnr++) {
+#if MEM_USE_POOLS_TRY_BIGGER_POOL
+again:
+#endif /* MEM_USE_POOLS_TRY_BIGGER_POOL */
+    /* is this pool big enough to hold an element of the required size
+       plus a struct memp_malloc_helper that saves the pool this element came from? */
+    if (required_size <= memp_sizes[poolnr]) {
+      break;
+    }
+  }
+  if (poolnr > MEMP_POOL_LAST) {
+    LWIP_ASSERT("mem_malloc(): no pool is that big!", 0);
+    return NULL;
+  }
+  element = (struct memp_malloc_helper*)memp_malloc(poolnr);
+  if (element == NULL) {
+    /* No need to DEBUGF or ASSERT: This error is already
+       taken care of in memp.c */
+#if MEM_USE_POOLS_TRY_BIGGER_POOL
+    /** Try a bigger pool if this one is empty! */
+    if (poolnr < MEMP_POOL_LAST) {
+      poolnr++;
+      goto again;
+    }
+#endif /* MEM_USE_POOLS_TRY_BIGGER_POOL */
+    return NULL;
+  }
+
+  /* save the pool number this element came from */
+  element->poolnr = poolnr;
+  /* and return a pointer to the memory directly after the struct memp_malloc_helper */
+  element++;
+
+  return element;
+}
+
+/**
+ * Free memory previously allocated by mem_malloc. Loads the pool number
+ * and calls memp_free with that pool number to put the element back into
+ * its pool
+ *
+ * @param rmem the memory element to free
+ */
+void
+mem_free(void *rmem)
+{
+  struct memp_malloc_helper *hmem = (struct memp_malloc_helper*)rmem;
+
+  LWIP_ASSERT("rmem != NULL", (rmem != NULL));
+  LWIP_ASSERT("rmem == MEM_ALIGN(rmem)", (rmem == LWIP_MEM_ALIGN(rmem)));
+
+  /* get the original struct memp_malloc_helper */
+  hmem--;
+
+  LWIP_ASSERT("hmem != NULL", (hmem != NULL));
+  LWIP_ASSERT("hmem == MEM_ALIGN(hmem)", (hmem == LWIP_MEM_ALIGN(hmem)));
+  LWIP_ASSERT("hmem->poolnr < MEMP_MAX", (hmem->poolnr < MEMP_MAX));
+
+  /* and put it in the pool we saved earlier */
+  memp_free(hmem->poolnr, hmem);
+}
+
+#else /* MEM_USE_POOLS */
+/* lwIP replacement for your libc malloc() */
+
+/**
+ * The heap is made up as a list of structs of this type.
+ * This does not have to be aligned since for getting its size,
+ * we only use the macro SIZEOF_STRUCT_MEM, which automatically alignes.
+ */
+struct mem {
+  /** index (-> ram[next]) of the next struct */
+  mem_size_t next;
+  /** index (-> ram[next]) of the next struct */
+  mem_size_t prev;
+  /** 1: this area is used; 0: this area is unused */
+  u8_t used;
+};
+
+/** All allocated blocks will be MIN_SIZE bytes big, at least!
+ * MIN_SIZE can be overridden to suit your needs. Smaller values save space,
+ * larger values could prevent too small blocks to fragment the RAM too much. */
+#ifndef MIN_SIZE
+#define MIN_SIZE             12
+#endif /* MIN_SIZE */
+/* some alignment macros: we define them here for better source code layout */
+#define MIN_SIZE_ALIGNED     LWIP_MEM_ALIGN_SIZE(MIN_SIZE)
+#define SIZEOF_STRUCT_MEM    LWIP_MEM_ALIGN_SIZE(sizeof(struct mem))
+#define MEM_SIZE_ALIGNED     LWIP_MEM_ALIGN_SIZE(MEM_SIZE)
+
+/** the heap. we need one struct mem at the end and some room for alignment */
+static u8_t ram_heap[MEM_SIZE_ALIGNED + (2*SIZEOF_STRUCT_MEM) + MEM_ALIGNMENT];
+/** pointer to the heap (ram_heap): for alignment, ram is now a pointer instead of an array */
+static u8_t *ram;
+/** the last entry, always unused! */
+static struct mem *ram_end;
+/** pointer to the lowest free block, this is used for faster search */
+static struct mem *lfree;
+
+/** concurrent access protection */
+static sys_sem_t mem_sem;
+
+#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+
+static volatile u8_t mem_free_count;
+
+/* Allow mem_free from other (e.g. interrupt) context */
+#define LWIP_MEM_FREE_DECL_PROTECT()  SYS_ARCH_DECL_PROTECT(lev_free)
+#define LWIP_MEM_FREE_PROTECT()       SYS_ARCH_PROTECT(lev_free)
+#define LWIP_MEM_FREE_UNPROTECT()     SYS_ARCH_UNPROTECT(lev_free)
+#define LWIP_MEM_ALLOC_DECL_PROTECT() SYS_ARCH_DECL_PROTECT(lev_alloc)
+#define LWIP_MEM_ALLOC_PROTECT()      SYS_ARCH_PROTECT(lev_alloc)
+#define LWIP_MEM_ALLOC_UNPROTECT()    SYS_ARCH_UNPROTECT(lev_alloc)
+
+#else /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+
+/* Protect the heap only by using a semaphore */
+#define LWIP_MEM_FREE_DECL_PROTECT()
+#define LWIP_MEM_FREE_PROTECT()    sys_arch_sem_wait(mem_sem, 0)
+#define LWIP_MEM_FREE_UNPROTECT()  sys_sem_signal(mem_sem)
+/* mem_malloc is protected using semaphore AND LWIP_MEM_ALLOC_PROTECT */
+#define LWIP_MEM_ALLOC_DECL_PROTECT()
+#define LWIP_MEM_ALLOC_PROTECT()
+#define LWIP_MEM_ALLOC_UNPROTECT()
+
+#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+
+
+/**
+ * "Plug holes" by combining adjacent empty struct mems.
+ * After this function is through, there should not exist
+ * one empty struct mem pointing to another empty struct mem.
+ *
+ * @param mem this points to a struct mem which just has been freed
+ * @internal this function is only called by mem_free() and mem_realloc()
+ *
+ * This assumes access to the heap is protected by the calling function
+ * already.
+ */
+static void
+plug_holes(struct mem *mem)
+{
+  struct mem *nmem;
+  struct mem *pmem;
+
+  LWIP_ASSERT("plug_holes: mem >= ram", (u8_t *)mem >= ram);
+  LWIP_ASSERT("plug_holes: mem < ram_end", (u8_t *)mem < (u8_t *)ram_end);
+  LWIP_ASSERT("plug_holes: mem->used == 0", mem->used == 0);
+
+  /* plug hole forward */
+  LWIP_ASSERT("plug_holes: mem->next <= MEM_SIZE_ALIGNED", mem->next <= MEM_SIZE_ALIGNED);
+
+  nmem = (struct mem *)&ram[mem->next];
+  if (mem != nmem && nmem->used == 0 && (u8_t *)nmem != (u8_t *)ram_end) {
+    /* if mem->next is unused and not end of ram, combine mem and mem->next */
+    if (lfree == nmem) {
+      lfree = mem;
+    }
+    mem->next = nmem->next;
+    ((struct mem *)&ram[nmem->next])->prev = (u8_t *)mem - ram;
+  }
+
+  /* plug hole backward */
+  pmem = (struct mem *)&ram[mem->prev];
+  if (pmem != mem && pmem->used == 0) {
+    /* if mem->prev is unused, combine mem and mem->prev */
+    if (lfree == mem) {
+      lfree = pmem;
+    }
+    pmem->next = mem->next;
+    ((struct mem *)&ram[mem->next])->prev = (u8_t *)pmem - ram;
+  }
+}
+
+/**
+ * Zero the heap and initialize start, end and lowest-free
+ */
+void
+mem_init(void)
+{
+  struct mem *mem;
+
+  LWIP_ASSERT("Sanity check alignment",
+    (SIZEOF_STRUCT_MEM & (MEM_ALIGNMENT-1)) == 0);
+
+  /* align the heap */
+  ram = LWIP_MEM_ALIGN(ram_heap);
+  /* initialize the start of the heap */
+  mem = (struct mem *)ram;
+  mem->next = MEM_SIZE_ALIGNED;
+  mem->prev = 0;
+  mem->used = 0;
+  /* initialize the end of the heap */
+  ram_end = (struct mem *)&ram[MEM_SIZE_ALIGNED];
+  ram_end->used = 1;
+  ram_end->next = MEM_SIZE_ALIGNED;
+  ram_end->prev = MEM_SIZE_ALIGNED;
+
+  mem_sem = sys_sem_new(1);
+
+  /* initialize the lowest-free pointer to the start of the heap */
+  lfree = (struct mem *)ram;
+
+  MEM_STATS_AVAIL(avail, MEM_SIZE_ALIGNED);
+}
+
+/**
+ * Put a struct mem back on the heap
+ *
+ * @param rmem is the data portion of a struct mem as returned by a previous
+ *             call to mem_malloc()
+ */
+void
+mem_free(void *rmem)
+{
+  struct mem *mem;
+  LWIP_MEM_FREE_DECL_PROTECT();
+
+  if (rmem == NULL) {
+    LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_TRACE | 2, ("mem_free(p == NULL) was called.\n"));
+    return;
+  }
+  LWIP_ASSERT("mem_free: sanity check alignment", (((mem_ptr_t)rmem) & (MEM_ALIGNMENT-1)) == 0);
+
+  LWIP_ASSERT("mem_free: legal memory", (u8_t *)rmem >= (u8_t *)ram &&
+    (u8_t *)rmem < (u8_t *)ram_end);
+
+  if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) {
+    SYS_ARCH_DECL_PROTECT(lev);
+    LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_free: illegal memory\n"));
+    /* protect mem stats from concurrent access */
+    SYS_ARCH_PROTECT(lev);
+    MEM_STATS_INC(illegal);
+    SYS_ARCH_UNPROTECT(lev);
+    return;
+  }
+  /* protect the heap from concurrent access */
+  LWIP_MEM_FREE_PROTECT();
+  /* Get the corresponding struct mem ... */
+  mem = (struct mem *)((u8_t *)rmem - SIZEOF_STRUCT_MEM);
+  /* ... which has to be in a used state ... */
+  LWIP_ASSERT("mem_free: mem->used", mem->used);
+  /* ... and is now unused. */
+  mem->used = 0;
+
+  if (mem < lfree) {
+    /* the newly freed struct is now the lowest */
+    lfree = mem;
+  }
+
+  MEM_STATS_DEC_USED(used, mem->next - ((u8_t *)mem - ram));
+
+  /* finally, see if prev or next are free also */
+  plug_holes(mem);
+#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+  mem_free_count = 1;
+#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+  LWIP_MEM_FREE_UNPROTECT();
+}
+
+/**
+ * In contrast to its name, mem_realloc can only shrink memory, not expand it.
+ * Since the only use (for now) is in pbuf_realloc (which also can only shrink),
+ * this shouldn't be a problem!
+ *
+ * @param rmem pointer to memory allocated by mem_malloc the is to be shrinked
+ * @param newsize required size after shrinking (needs to be smaller than or
+ *                equal to the previous size)
+ * @return for compatibility reasons: is always == rmem, at the moment
+ *         or NULL if newsize is > old size, in which case rmem is NOT touched
+ *         or freed!
+ */
+void *
+mem_realloc(void *rmem, mem_size_t newsize)
+{
+  mem_size_t size;
+  mem_size_t ptr, ptr2;
+  struct mem *mem, *mem2;
+  /* use the FREE_PROTECT here: it protects with sem OR SYS_ARCH_PROTECT */
+  LWIP_MEM_FREE_DECL_PROTECT();
+
+  /* Expand the size of the allocated memory region so that we can
+     adjust for alignment. */
+  newsize = LWIP_MEM_ALIGN_SIZE(newsize);
+
+  if(newsize < MIN_SIZE_ALIGNED) {
+    /* every data block must be at least MIN_SIZE_ALIGNED long */
+    newsize = MIN_SIZE_ALIGNED;
+  }
+
+  if (newsize > MEM_SIZE_ALIGNED) {
+    return NULL;
+  }
+
+  LWIP_ASSERT("mem_realloc: legal memory", (u8_t *)rmem >= (u8_t *)ram &&
+   (u8_t *)rmem < (u8_t *)ram_end);
+
+  if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) {
+    SYS_ARCH_DECL_PROTECT(lev);
+    LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_realloc: illegal memory\n"));
+    /* protect mem stats from concurrent access */
+    SYS_ARCH_PROTECT(lev);
+    MEM_STATS_INC(illegal);
+    SYS_ARCH_UNPROTECT(lev);
+    return rmem;
+  }
+  /* Get the corresponding struct mem ... */
+  mem = (struct mem *)((u8_t *)rmem - SIZEOF_STRUCT_MEM);
+  /* ... and its offset pointer */
+  ptr = (u8_t *)mem - ram;
+
+  size = mem->next - ptr - SIZEOF_STRUCT_MEM;
+  LWIP_ASSERT("mem_realloc can only shrink memory", newsize <= size);
+  if (newsize > size) {
+    /* not supported */
+    return NULL;
+  }
+  if (newsize == size) {
+    /* No change in size, simply return */
+    return rmem;
+  }
+
+  /* protect the heap from concurrent access */
+  LWIP_MEM_FREE_PROTECT();
+
+  MEM_STATS_DEC_USED(used, (size - newsize));
+
+  mem2 = (struct mem *)&ram[mem->next];
+  if(mem2->used == 0) {
+    /* The next struct is unused, we can simply move it at little */
+    mem_size_t next;
+    /* remember the old next pointer */
+    next = mem2->next;
+    /* create new struct mem which is moved directly after the shrinked mem */
+    ptr2 = ptr + SIZEOF_STRUCT_MEM + newsize;
+    if (lfree == mem2) {
+      lfree = (struct mem *)&ram[ptr2];
+    }
+    mem2 = (struct mem *)&ram[ptr2];
+    mem2->used = 0;
+    /* restore the next pointer */
+    mem2->next = next;
+    /* link it back to mem */
+    mem2->prev = ptr;
+    /* link mem to it */
+    mem->next = ptr2;
+    /* last thing to restore linked list: as we have moved mem2,
+     * let 'mem2->next->prev' point to mem2 again. but only if mem2->next is not
+     * the end of the heap */
+    if (mem2->next != MEM_SIZE_ALIGNED) {
+      ((struct mem *)&ram[mem2->next])->prev = ptr2;
+    }
+    /* no need to plug holes, we've already done that */
+  } else if (newsize + SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED <= size) {
+    /* Next struct is used but there's room for another struct mem with
+     * at least MIN_SIZE_ALIGNED of data.
+     * Old size ('size') must be big enough to contain at least 'newsize' plus a struct mem
+     * ('SIZEOF_STRUCT_MEM') with some data ('MIN_SIZE_ALIGNED').
+     * @todo we could leave out MIN_SIZE_ALIGNED. We would create an empty
+     *       region that couldn't hold data, but when mem->next gets freed,
+     *       the 2 regions would be combined, resulting in more free memory */
+    ptr2 = ptr + SIZEOF_STRUCT_MEM + newsize;
+    mem2 = (struct mem *)&ram[ptr2];
+    if (mem2 < lfree) {
+      lfree = mem2;
+    }
+    mem2->used = 0;
+    mem2->next = mem->next;
+    mem2->prev = ptr;
+    mem->next = ptr2;
+    if (mem2->next != MEM_SIZE_ALIGNED) {
+      ((struct mem *)&ram[mem2->next])->prev = ptr2;
+    }
+    /* the original mem->next is used, so no need to plug holes! */
+  }
+  /* else {
+    next struct mem is used but size between mem and mem2 is not big enough
+    to create another struct mem
+    -> don't do anyhting. 
+    -> the remaining space stays unused since it is too small
+  } */
+#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+  mem_free_count = 1;
+#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+  LWIP_MEM_FREE_UNPROTECT();
+  return rmem;
+}
+
+/**
+ * Adam's mem_malloc() plus solution for bug #17922
+ * Allocate a block of memory with a minimum of 'size' bytes.
+ *
+ * @param size is the minimum size of the requested block in bytes.
+ * @return pointer to allocated memory or NULL if no free memory was found.
+ *
+ * Note that the returned value will always be aligned (as defined by MEM_ALIGNMENT).
+ */
+void *
+mem_malloc(mem_size_t size)
+{
+  mem_size_t ptr, ptr2;
+  struct mem *mem, *mem2;
+#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+  u8_t local_mem_free_count = 0;
+#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+  LWIP_MEM_ALLOC_DECL_PROTECT();
+
+  if (size == 0) {
+    return NULL;
+  }
+
+  /* Expand the size of the allocated memory region so that we can
+     adjust for alignment. */
+  size = LWIP_MEM_ALIGN_SIZE(size);
+
+  if(size < MIN_SIZE_ALIGNED) {
+    /* every data block must be at least MIN_SIZE_ALIGNED long */
+    size = MIN_SIZE_ALIGNED;
+  }
+
+  if (size > MEM_SIZE_ALIGNED) {
+    return NULL;
+  }
+
+  /* protect the heap from concurrent access */
+  sys_arch_sem_wait(mem_sem, 0);
+  LWIP_MEM_ALLOC_PROTECT();
+#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+  /* run as long as a mem_free disturbed mem_malloc */
+  do {
+    local_mem_free_count = 0;
+#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+
+    /* Scan through the heap searching for a free block that is big enough,
+     * beginning with the lowest free block.
+     */
+    for (ptr = (u8_t *)lfree - ram; ptr < MEM_SIZE_ALIGNED - size;
+         ptr = ((struct mem *)&ram[ptr])->next) {
+      mem = (struct mem *)&ram[ptr];
+#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+      mem_free_count = 0;
+      LWIP_MEM_ALLOC_UNPROTECT();
+      /* allow mem_free to run */
+      LWIP_MEM_ALLOC_PROTECT();
+      if (mem_free_count != 0) {
+        local_mem_free_count = mem_free_count;
+      }
+      mem_free_count = 0;
+#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+
+      if ((!mem->used) &&
+          (mem->next - (ptr + SIZEOF_STRUCT_MEM)) >= size) {
+        /* mem is not used and at least perfect fit is possible:
+         * mem->next - (ptr + SIZEOF_STRUCT_MEM) gives us the 'user data size' of mem */
+
+        if (mem->next - (ptr + SIZEOF_STRUCT_MEM) >= (size + SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED)) {
+          /* (in addition to the above, we test if another struct mem (SIZEOF_STRUCT_MEM) containing
+           * at least MIN_SIZE_ALIGNED of data also fits in the 'user data space' of 'mem')
+           * -> split large block, create empty remainder,
+           * remainder must be large enough to contain MIN_SIZE_ALIGNED data: if
+           * mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) == size,
+           * struct mem would fit in but no data between mem2 and mem2->next
+           * @todo we could leave out MIN_SIZE_ALIGNED. We would create an empty
+           *       region that couldn't hold data, but when mem->next gets freed,
+           *       the 2 regions would be combined, resulting in more free memory
+           */
+          ptr2 = ptr + SIZEOF_STRUCT_MEM + size;
+          /* create mem2 struct */
+          mem2 = (struct mem *)&ram[ptr2];
+          mem2->used = 0;
+          mem2->next = mem->next;
+          mem2->prev = ptr;
+          /* and insert it between mem and mem->next */
+          mem->next = ptr2;
+          mem->used = 1;
+
+          if (mem2->next != MEM_SIZE_ALIGNED) {
+            ((struct mem *)&ram[mem2->next])->prev = ptr2;
+          }
+          MEM_STATS_INC_USED(used, (size + SIZEOF_STRUCT_MEM));
+        } else {
+          /* (a mem2 struct does no fit into the user data space of mem and mem->next will always
+           * be used at this point: if not we have 2 unused structs in a row, plug_holes should have
+           * take care of this).
+           * -> near fit or excact fit: do not split, no mem2 creation
+           * also can't move mem->next directly behind mem, since mem->next
+           * will always be used at this point!
+           */
+          mem->used = 1;
+          MEM_STATS_INC_USED(used, mem->next - ((u8_t *)mem - ram));
+        }
+
+        if (mem == lfree) {
+          /* Find next free block after mem and update lowest free pointer */
+          while (lfree->used && lfree != ram_end) {
+            LWIP_MEM_ALLOC_UNPROTECT();
+            /* prevent high interrupt latency... */
+            LWIP_MEM_ALLOC_PROTECT();
+            lfree = (struct mem *)&ram[lfree->next];
+          }
+          LWIP_ASSERT("mem_malloc: !lfree->used", ((lfree == ram_end) || (!lfree->used)));
+        }
+        LWIP_MEM_ALLOC_UNPROTECT();
+        sys_sem_signal(mem_sem);
+        LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.",
+         (mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end);
+        LWIP_ASSERT("mem_malloc: allocated memory properly aligned.",
+         ((mem_ptr_t)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT == 0);
+        LWIP_ASSERT("mem_malloc: sanity check alignment",
+          (((mem_ptr_t)mem) & (MEM_ALIGNMENT-1)) == 0);
+
+        return (u8_t *)mem + SIZEOF_STRUCT_MEM;
+      }
+    }
+#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+    /* if we got interrupted by a mem_free, try again */
+  } while(local_mem_free_count != 0);
+#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+  LWIP_DEBUGF(MEM_DEBUG | 2, ("mem_malloc: could not allocate %"S16_F" bytes\n", (s16_t)size));
+  MEM_STATS_INC(err);
+  LWIP_MEM_ALLOC_UNPROTECT();
+  sys_sem_signal(mem_sem);
+  return NULL;
+}
+
+#endif /* MEM_USE_POOLS */
+/**
+ * Contiguously allocates enough space for count objects that are size bytes
+ * of memory each and returns a pointer to the allocated memory.
+ *
+ * The allocated memory is filled with bytes of value zero.
+ *
+ * @param count number of objects to allocate
+ * @param size size of the objects to allocate
+ * @return pointer to allocated memory / NULL pointer if there is an error
+ */
+void *mem_calloc(mem_size_t count, mem_size_t size)
+{
+  void *p;
+
+  /* allocate 'count' objects of size 'size' */
+  p = mem_malloc(count * size);
+  if (p) {
+    /* zero the memory */
+    memset(p, 0, count * size);
+  }
+  return p;
+}
+
+#endif /* !MEM_LIBC_MALLOC */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/memp.c b/firmware/x300/lwip/lwip-1.3.1/src/core/memp.c
new file mode 100644
index 000000000..dfc32213d
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/memp.c
@@ -0,0 +1,386 @@
+/**
+ * @file
+ * Dynamic pool memory manager
+ *
+ * lwIP has dedicated pools for many structures (netconn, protocol control blocks,
+ * packet buffers, ...). All these pools are managed here.
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/memp.h"
+#include "lwip/pbuf.h"
+#include "lwip/udp.h"
+#include "lwip/raw.h"
+#include "lwip/tcp.h"
+#include "lwip/igmp.h"
+#include "lwip/api.h"
+#include "lwip/api_msg.h"
+#include "lwip/tcpip.h"
+#include "lwip/sys.h"
+#include "lwip/stats.h"
+#include "netif/etharp.h"
+#include "lwip/ip_frag.h"
+
+#include <string.h>
+
+#if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */
+
+struct memp {
+  struct memp *next;
+#if MEMP_OVERFLOW_CHECK
+  const char *file;
+  int line;
+#endif /* MEMP_OVERFLOW_CHECK */
+};
+
+#if MEMP_OVERFLOW_CHECK
+/* if MEMP_OVERFLOW_CHECK is turned on, we reserve some bytes at the beginning
+ * and at the end of each element, initialize them as 0xcd and check
+ * them later. */
+/* If MEMP_OVERFLOW_CHECK is >= 2, on every call to memp_malloc or memp_free,
+ * every single element in each pool is checked!
+ * This is VERY SLOW but also very helpful. */
+/* MEMP_SANITY_REGION_BEFORE and MEMP_SANITY_REGION_AFTER can be overridden in
+ * lwipopts.h to change the amount reserved for checking. */
+#ifndef MEMP_SANITY_REGION_BEFORE
+#define MEMP_SANITY_REGION_BEFORE  16
+#endif /* MEMP_SANITY_REGION_BEFORE*/
+#if MEMP_SANITY_REGION_BEFORE > 0
+#define MEMP_SANITY_REGION_BEFORE_ALIGNED    LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_BEFORE)
+#else
+#define MEMP_SANITY_REGION_BEFORE_ALIGNED    0
+#endif /* MEMP_SANITY_REGION_BEFORE*/
+#ifndef MEMP_SANITY_REGION_AFTER
+#define MEMP_SANITY_REGION_AFTER   16
+#endif /* MEMP_SANITY_REGION_AFTER*/
+#if MEMP_SANITY_REGION_AFTER > 0
+#define MEMP_SANITY_REGION_AFTER_ALIGNED     LWIP_MEM_ALIGN_SIZE(MEMP_SANITY_REGION_AFTER)
+#else
+#define MEMP_SANITY_REGION_AFTER_ALIGNED     0
+#endif /* MEMP_SANITY_REGION_AFTER*/
+
+/* MEMP_SIZE: save space for struct memp and for sanity check */
+#define MEMP_SIZE          (LWIP_MEM_ALIGN_SIZE(sizeof(struct memp)) + MEMP_SANITY_REGION_BEFORE_ALIGNED)
+#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x) + MEMP_SANITY_REGION_AFTER_ALIGNED)
+
+#else /* MEMP_OVERFLOW_CHECK */
+
+/* No sanity checks
+ * We don't need to preserve the struct memp while not allocated, so we
+ * can save a little space and set MEMP_SIZE to 0.
+ */
+#define MEMP_SIZE           0
+#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x))
+
+#endif /* MEMP_OVERFLOW_CHECK */
+
+/** This array holds the first free element of each pool.
+ *  Elements form a linked list. */
+static struct memp *memp_tab[MEMP_MAX];
+
+#else /* MEMP_MEM_MALLOC */
+
+#define MEMP_ALIGN_SIZE(x) (LWIP_MEM_ALIGN_SIZE(x))
+
+#endif /* MEMP_MEM_MALLOC */
+
+/** This array holds the element sizes of each pool. */
+#if !MEM_USE_POOLS && !MEMP_MEM_MALLOC
+static
+#endif
+const u16_t memp_sizes[MEMP_MAX] = {
+#define LWIP_MEMPOOL(name,num,size,desc)  LWIP_MEM_ALIGN_SIZE(size),
+#include "lwip/memp_std.h"
+};
+
+#if !MEMP_MEM_MALLOC /* don't build if not configured for use in lwipopts.h */
+
+/** This array holds the number of elements in each pool. */
+static const u16_t memp_num[MEMP_MAX] = {
+#define LWIP_MEMPOOL(name,num,size,desc)  (num),
+#include "lwip/memp_std.h"
+};
+
+/** This array holds a textual description of each pool. */
+#ifdef LWIP_DEBUG
+static const char *memp_desc[MEMP_MAX] = {
+#define LWIP_MEMPOOL(name,num,size,desc)  (desc),
+#include "lwip/memp_std.h"
+};
+#endif /* LWIP_DEBUG */
+
+/** This is the actual memory used by the pools. */
+static u8_t memp_memory[MEM_ALIGNMENT - 1 
+#define LWIP_MEMPOOL(name,num,size,desc) + ( (num) * (MEMP_SIZE + MEMP_ALIGN_SIZE(size) ) )
+#include "lwip/memp_std.h"
+];
+
+#if MEMP_SANITY_CHECK
+/**
+ * Check that memp-lists don't form a circle
+ */
+static int
+memp_sanity(void)
+{
+  s16_t i, c;
+  struct memp *m, *n;
+
+  for (i = 0; i < MEMP_MAX; i++) {
+    for (m = memp_tab[i]; m != NULL; m = m->next) {
+      c = 1;
+      for (n = memp_tab[i]; n != NULL; n = n->next) {
+        if (n == m && --c < 0) {
+          return 0;
+        }
+      }
+    }
+  }
+  return 1;
+}
+#endif /* MEMP_SANITY_CHECK*/
+#if MEMP_OVERFLOW_CHECK
+/**
+ * Check if a memp element was victim of an overflow
+ * (e.g. the restricted area after it has been altered)
+ *
+ * @param p the memp element to check
+ * @param memp_size the element size of the pool p comes from
+ */
+static void
+memp_overflow_check_element(struct memp *p, u16_t memp_size)
+{
+  u16_t k;
+  u8_t *m;
+#if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0
+  m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED;
+  for (k = 0; k < MEMP_SANITY_REGION_BEFORE_ALIGNED; k++) {
+    if (m[k] != 0xcd) {
+      LWIP_ASSERT("detected memp underflow!", 0);
+    }
+  }
+#endif
+#if MEMP_SANITY_REGION_AFTER_ALIGNED > 0
+  m = (u8_t*)p + MEMP_SIZE + memp_size;
+  for (k = 0; k < MEMP_SANITY_REGION_AFTER_ALIGNED; k++) {
+    if (m[k] != 0xcd) {
+      LWIP_ASSERT("detected memp overflow!", 0);
+    }
+  }
+#endif
+}
+
+/**
+ * Do an overflow check for all elements in every pool.
+ *
+ * @see memp_overflow_check_element for a description of the check
+ */
+static void
+memp_overflow_check_all(void)
+{
+  u16_t i, j;
+  struct memp *p;
+
+  p = LWIP_MEM_ALIGN(memp_memory);
+  for (i = 0; i < MEMP_MAX; ++i) {
+    p = p;
+    for (j = 0; j < memp_num[i]; ++j) {
+      memp_overflow_check_element(p, memp_sizes[i]);
+      p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
+    }
+  }
+}
+
+/**
+ * Initialize the restricted areas of all memp elements in every pool.
+ */
+static void
+memp_overflow_init(void)
+{
+  u16_t i, j;
+  struct memp *p;
+  u8_t *m;
+
+  p = LWIP_MEM_ALIGN(memp_memory);
+  for (i = 0; i < MEMP_MAX; ++i) {
+    p = p;
+    for (j = 0; j < memp_num[i]; ++j) {
+#if MEMP_SANITY_REGION_BEFORE_ALIGNED > 0
+      m = (u8_t*)p + MEMP_SIZE - MEMP_SANITY_REGION_BEFORE_ALIGNED;
+      memset(m, 0xcd, MEMP_SANITY_REGION_BEFORE_ALIGNED);
+#endif
+#if MEMP_SANITY_REGION_AFTER_ALIGNED > 0
+      m = (u8_t*)p + MEMP_SIZE + memp_sizes[i];
+      memset(m, 0xcd, MEMP_SANITY_REGION_AFTER_ALIGNED);
+#endif
+      p = (struct memp*)((u8_t*)p + MEMP_SIZE + memp_sizes[i] + MEMP_SANITY_REGION_AFTER_ALIGNED);
+    }
+  }
+}
+#endif /* MEMP_OVERFLOW_CHECK */
+
+/**
+ * Initialize this module.
+ * 
+ * Carves out memp_memory into linked lists for each pool-type.
+ */
+void
+memp_init(void)
+{
+  struct memp *memp;
+  u16_t i, j;
+
+  for (i = 0; i < MEMP_MAX; ++i) {
+    MEMP_STATS_AVAIL(used, i, 0);
+    MEMP_STATS_AVAIL(max, i, 0);
+    MEMP_STATS_AVAIL(err, i, 0);
+    MEMP_STATS_AVAIL(avail, i, memp_num[i]);
+  }
+
+  memp = LWIP_MEM_ALIGN(memp_memory);
+  /* for every pool: */
+  for (i = 0; i < MEMP_MAX; ++i) {
+    memp_tab[i] = NULL;
+    /* create a linked list of memp elements */
+    for (j = 0; j < memp_num[i]; ++j) {
+      memp->next = memp_tab[i];
+      memp_tab[i] = memp;
+      memp = (struct memp *)((u8_t *)memp + MEMP_SIZE + memp_sizes[i]
+#if MEMP_OVERFLOW_CHECK
+        + MEMP_SANITY_REGION_AFTER_ALIGNED
+#endif
+      );
+    }
+  }
+#if MEMP_OVERFLOW_CHECK
+  memp_overflow_init();
+  /* check everything a first time to see if it worked */
+  memp_overflow_check_all();
+#endif /* MEMP_OVERFLOW_CHECK */
+}
+
+/**
+ * Get an element from a specific pool.
+ *
+ * @param type the pool to get an element from
+ *
+ * the debug version has two more parameters:
+ * @param file file name calling this function
+ * @param line number of line where this function is called
+ *
+ * @return a pointer to the allocated memory or a NULL pointer on error
+ */
+void *
+#if !MEMP_OVERFLOW_CHECK
+memp_malloc(memp_t type)
+#else
+memp_malloc_fn(memp_t type, const char* file, const int line)
+#endif
+{
+  struct memp *memp;
+  SYS_ARCH_DECL_PROTECT(old_level);
+ 
+  LWIP_ERROR("memp_malloc: type < MEMP_MAX", (type < MEMP_MAX), return NULL;);
+
+  SYS_ARCH_PROTECT(old_level);
+#if MEMP_OVERFLOW_CHECK >= 2
+  memp_overflow_check_all();
+#endif /* MEMP_OVERFLOW_CHECK >= 2 */
+
+  memp = memp_tab[type];
+  
+  if (memp != NULL) {
+    memp_tab[type] = memp->next;
+#if MEMP_OVERFLOW_CHECK
+    memp->next = NULL;
+    memp->file = file;
+    memp->line = line;
+#endif /* MEMP_OVERFLOW_CHECK */
+    MEMP_STATS_INC_USED(used, type);
+    LWIP_ASSERT("memp_malloc: memp properly aligned",
+                ((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);
+    memp = (struct memp*)((u8_t*)memp + MEMP_SIZE);
+  } else {
+    LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %s\n", memp_desc[type]));
+    MEMP_STATS_INC(err, type);
+  }
+
+  SYS_ARCH_UNPROTECT(old_level);
+
+  return memp;
+}
+
+/**
+ * Put an element back into its pool.
+ *
+ * @param type the pool where to put mem
+ * @param mem the memp element to free
+ */
+void
+memp_free(memp_t type, void *mem)
+{
+  struct memp *memp;
+  SYS_ARCH_DECL_PROTECT(old_level);
+
+  if (mem == NULL) {
+    return;
+  }
+  LWIP_ASSERT("memp_free: mem properly aligned",
+                ((mem_ptr_t)mem % MEM_ALIGNMENT) == 0);
+
+  memp = (struct memp *)((u8_t*)mem - MEMP_SIZE);
+
+  SYS_ARCH_PROTECT(old_level);
+#if MEMP_OVERFLOW_CHECK
+#if MEMP_OVERFLOW_CHECK >= 2
+  memp_overflow_check_all();
+#else
+  memp_overflow_check_element(memp, memp_sizes[type]);
+#endif /* MEMP_OVERFLOW_CHECK >= 2 */
+#endif /* MEMP_OVERFLOW_CHECK */
+
+  MEMP_STATS_DEC(used, type); 
+  
+  memp->next = memp_tab[type]; 
+  memp_tab[type] = memp;
+
+#if MEMP_SANITY_CHECK
+  LWIP_ASSERT("memp sanity", memp_sanity());
+#endif /* MEMP_SANITY_CHECK */
+
+  SYS_ARCH_UNPROTECT(old_level);
+}
+
+#endif /* MEMP_MEM_MALLOC */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/netif.c b/firmware/x300/lwip/lwip-1.3.1/src/core/netif.c
new file mode 100644
index 000000000..c9b6b9b5e
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/netif.c
@@ -0,0 +1,655 @@
+/**
+ * @file
+ * lwIP network interface abstraction
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/def.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/tcp.h"
+#include "lwip/snmp.h"
+#include "lwip/igmp.h"
+#include "netif/etharp.h"
+#if ENABLE_LOOPBACK
+#include "lwip/sys.h"
+#if LWIP_NETIF_LOOPBACK_MULTITHREADING
+#include "lwip/tcpip.h"
+#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
+#endif /* ENABLE_LOOPBACK */
+
+#if LWIP_NETIF_STATUS_CALLBACK
+#define NETIF_STATUS_CALLBACK(n) { if (n->status_callback) (n->status_callback)(n); }
+#else
+#define NETIF_STATUS_CALLBACK(n) { /* NOP */ }
+#endif /* LWIP_NETIF_STATUS_CALLBACK */ 
+
+#if LWIP_NETIF_LINK_CALLBACK
+#define NETIF_LINK_CALLBACK(n) { if (n->link_callback) (n->link_callback)(n); }
+#else
+#define NETIF_LINK_CALLBACK(n) { /* NOP */ }
+#endif /* LWIP_NETIF_LINK_CALLBACK */ 
+
+struct netif *netif_list;
+struct netif *netif_default;
+
+/**
+ * Add a network interface to the list of lwIP netifs.
+ *
+ * @param netif a pre-allocated netif structure
+ * @param ipaddr IP address for the new netif
+ * @param netmask network mask for the new netif
+ * @param gw default gateway IP address for the new netif
+ * @param state opaque data passed to the new netif
+ * @param init callback function that initializes the interface
+ * @param input callback function that is called to pass
+ * ingress packets up in the protocol layer stack.
+ *
+ * @return netif, or NULL if failed.
+ */
+struct netif *
+netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
+  struct ip_addr *gw,
+  void *state,
+  err_t (* init)(struct netif *netif),
+  err_t (* input)(struct pbuf *p, struct netif *netif))
+{
+  static u8_t netifnum = 0;
+
+  /* reset new interface configuration state */
+  netif->ip_addr.addr = 0;
+  netif->netmask.addr = 0;
+  netif->gw.addr = 0;
+  netif->flags = 0;
+#if LWIP_DHCP
+  /* netif not under DHCP control by default */
+  netif->dhcp = NULL;
+#endif /* LWIP_DHCP */
+#if LWIP_AUTOIP
+  /* netif not under AutoIP control by default */
+  netif->autoip = NULL;
+#endif /* LWIP_AUTOIP */
+#if LWIP_NETIF_STATUS_CALLBACK
+  netif->status_callback = NULL;
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+#if LWIP_NETIF_LINK_CALLBACK
+  netif->link_callback = NULL;
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+#if LWIP_IGMP
+  netif->igmp_mac_filter = NULL;
+#endif /* LWIP_IGMP */
+#if ENABLE_LOOPBACK
+  netif->loop_first = NULL;
+  netif->loop_last = NULL;
+#endif /* ENABLE_LOOPBACK */
+
+  /* remember netif specific state information data */
+  netif->state = state;
+  netif->num = netifnum++;
+  netif->input = input;
+#if LWIP_NETIF_HWADDRHINT
+  netif->addr_hint = NULL;
+#endif /* LWIP_NETIF_HWADDRHINT*/
+#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
+  netif->loop_cnt_current = 0;
+#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
+
+  netif_set_addr(netif, ipaddr, netmask, gw);
+
+  /* call user specified initialization function for netif */
+  if (init(netif) != ERR_OK) {
+    return NULL;
+  }
+
+  /* add this netif to the list */
+  netif->next = netif_list;
+  netif_list = netif;
+  snmp_inc_iflist();
+
+#if LWIP_IGMP
+  /* start IGMP processing */
+  if (netif->flags & NETIF_FLAG_IGMP) {
+    igmp_start( netif);
+  }
+#endif /* LWIP_IGMP */
+
+  LWIP_DEBUGF(NETIF_DEBUG, ("netif: added interface %c%c IP addr ",
+    netif->name[0], netif->name[1]));
+  ip_addr_debug_print(NETIF_DEBUG, ipaddr);
+  LWIP_DEBUGF(NETIF_DEBUG, (" netmask "));
+  ip_addr_debug_print(NETIF_DEBUG, netmask);
+  LWIP_DEBUGF(NETIF_DEBUG, (" gw "));
+  ip_addr_debug_print(NETIF_DEBUG, gw);
+  LWIP_DEBUGF(NETIF_DEBUG, ("\n"));
+  return netif;
+}
+
+/**
+ * Change IP address configuration for a network interface (including netmask
+ * and default gateway).
+ *
+ * @param netif the network interface to change
+ * @param ipaddr the new IP address
+ * @param netmask the new netmask
+ * @param gw the new default gateway
+ */
+void
+netif_set_addr(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
+    struct ip_addr *gw)
+{
+  netif_set_ipaddr(netif, ipaddr);
+  netif_set_netmask(netif, netmask);
+  netif_set_gw(netif, gw);
+}
+
+/**
+ * Remove a network interface from the list of lwIP netifs.
+ *
+ * @param netif the network interface to remove
+ */
+void netif_remove(struct netif * netif)
+{
+  if ( netif == NULL ) return;
+
+#if LWIP_IGMP
+  /* stop IGMP processing */
+  if (netif->flags & NETIF_FLAG_IGMP) {
+    igmp_stop( netif);
+  }
+#endif /* LWIP_IGMP */
+
+  snmp_delete_ipaddridx_tree(netif);
+
+  /*  is it the first netif? */
+  if (netif_list == netif) {
+    netif_list = netif->next;
+    snmp_dec_iflist();
+  }
+  else {
+    /*  look for netif further down the list */
+    struct netif * tmpNetif;
+    for (tmpNetif = netif_list; tmpNetif != NULL; tmpNetif = tmpNetif->next) {
+      if (tmpNetif->next == netif) {
+        tmpNetif->next = netif->next;
+        snmp_dec_iflist();
+        break;
+      }
+    }
+    if (tmpNetif == NULL)
+      return; /*  we didn't find any netif today */
+  }
+  /* this netif is default? */
+  if (netif_default == netif)
+    /* reset default netif */
+    netif_set_default(NULL);
+  LWIP_DEBUGF( NETIF_DEBUG, ("netif_remove: removed netif\n") );
+}
+
+/**
+ * Find a network interface by searching for its name
+ *
+ * @param name the name of the netif (like netif->name) plus concatenated number
+ * in ascii representation (e.g. 'en0')
+ */
+struct netif *
+netif_find(char *name)
+{
+  struct netif *netif;
+  u8_t num;
+
+  if (name == NULL) {
+    return NULL;
+  }
+
+  num = name[2] - '0';
+
+  for(netif = netif_list; netif != NULL; netif = netif->next) {
+    if (num == netif->num &&
+       name[0] == netif->name[0] &&
+       name[1] == netif->name[1]) {
+      LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: found %c%c\n", name[0], name[1]));
+      return netif;
+    }
+  }
+  LWIP_DEBUGF(NETIF_DEBUG, ("netif_find: didn't find %c%c\n", name[0], name[1]));
+  return NULL;
+}
+
+/**
+ * Change the IP address of a network interface
+ *
+ * @param netif the network interface to change
+ * @param ipaddr the new IP address
+ *
+ * @note call netif_set_addr() if you also want to change netmask and
+ * default gateway
+ */
+void
+netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr)
+{
+  /* TODO: Handling of obsolete pcbs */
+  /* See:  http://mail.gnu.org/archive/html/lwip-users/2003-03/msg00118.html */
+#if LWIP_TCP
+  struct tcp_pcb *pcb;
+  struct tcp_pcb_listen *lpcb;
+
+  /* address is actually being changed? */
+  if ((ip_addr_cmp(ipaddr, &(netif->ip_addr))) == 0)
+  {
+    /* extern struct tcp_pcb *tcp_active_pcbs; defined by tcp.h */
+    LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: netif address being changed\n"));
+    pcb = tcp_active_pcbs;
+    while (pcb != NULL) {
+      /* PCB bound to current local interface address? */
+      if (ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) {
+        /* this connection must be aborted */
+        struct tcp_pcb *next = pcb->next;
+        LWIP_DEBUGF(NETIF_DEBUG | 1, ("netif_set_ipaddr: aborting TCP pcb %p\n", (void *)pcb));
+        tcp_abort(pcb);
+        pcb = next;
+      } else {
+        pcb = pcb->next;
+      }
+    }
+    for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
+      /* PCB bound to current local interface address? */
+      if ((!(ip_addr_isany(&(lpcb->local_ip)))) &&
+          (ip_addr_cmp(&(lpcb->local_ip), &(netif->ip_addr)))) {
+        /* The PCB is listening to the old ipaddr and
+         * is set to listen to the new one instead */
+        ip_addr_set(&(lpcb->local_ip), ipaddr);
+      }
+    }
+  }
+#endif
+  snmp_delete_ipaddridx_tree(netif);
+  snmp_delete_iprteidx_tree(0,netif);
+  /* set new IP address to netif */
+  ip_addr_set(&(netif->ip_addr), ipaddr);
+  snmp_insert_ipaddridx_tree(netif);
+  snmp_insert_iprteidx_tree(0,netif);
+
+  LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 3, ("netif: IP address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
+    netif->name[0], netif->name[1],
+    ip4_addr1(&netif->ip_addr),
+    ip4_addr2(&netif->ip_addr),
+    ip4_addr3(&netif->ip_addr),
+    ip4_addr4(&netif->ip_addr)));
+}
+
+/**
+ * Change the default gateway for a network interface
+ *
+ * @param netif the network interface to change
+ * @param gw the new default gateway
+ *
+ * @note call netif_set_addr() if you also want to change ip address and netmask
+ */
+void
+netif_set_gw(struct netif *netif, struct ip_addr *gw)
+{
+  ip_addr_set(&(netif->gw), gw);
+  LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 3, ("netif: GW address of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
+    netif->name[0], netif->name[1],
+    ip4_addr1(&netif->gw),
+    ip4_addr2(&netif->gw),
+    ip4_addr3(&netif->gw),
+    ip4_addr4(&netif->gw)));
+}
+
+/**
+ * Change the netmask of a network interface
+ *
+ * @param netif the network interface to change
+ * @param netmask the new netmask
+ *
+ * @note call netif_set_addr() if you also want to change ip address and
+ * default gateway
+ */
+void
+netif_set_netmask(struct netif *netif, struct ip_addr *netmask)
+{
+  snmp_delete_iprteidx_tree(0, netif);
+  /* set new netmask to netif */
+  ip_addr_set(&(netif->netmask), netmask);
+  snmp_insert_iprteidx_tree(0, netif);
+  LWIP_DEBUGF(NETIF_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE | 3, ("netif: netmask of interface %c%c set to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
+    netif->name[0], netif->name[1],
+    ip4_addr1(&netif->netmask),
+    ip4_addr2(&netif->netmask),
+    ip4_addr3(&netif->netmask),
+    ip4_addr4(&netif->netmask)));
+}
+
+/**
+ * Set a network interface as the default network interface
+ * (used to output all packets for which no specific route is found)
+ *
+ * @param netif the default network interface
+ */
+void
+netif_set_default(struct netif *netif)
+{
+  if (netif == NULL)
+  {
+    /* remove default route */
+    snmp_delete_iprteidx_tree(1, netif);
+  }
+  else
+  {
+    /* install default route */
+    snmp_insert_iprteidx_tree(1, netif);
+  }
+  netif_default = netif;
+  LWIP_DEBUGF(NETIF_DEBUG, ("netif: setting default interface %c%c\n",
+           netif ? netif->name[0] : '\'', netif ? netif->name[1] : '\''));
+}
+
+/**
+ * Bring an interface up, available for processing
+ * traffic.
+ * 
+ * @note: Enabling DHCP on a down interface will make it come
+ * up once configured.
+ * 
+ * @see dhcp_start()
+ */ 
+void netif_set_up(struct netif *netif)
+{
+  if ( !(netif->flags & NETIF_FLAG_UP )) {
+    netif->flags |= NETIF_FLAG_UP;
+    
+#if LWIP_SNMP
+    snmp_get_sysuptime(&netif->ts);
+#endif /* LWIP_SNMP */
+
+    NETIF_LINK_CALLBACK(netif);
+    NETIF_STATUS_CALLBACK(netif);
+
+#if LWIP_ARP
+    /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */ 
+    if (netif->flags & NETIF_FLAG_ETHARP) {
+      etharp_gratuitous(netif);
+    }
+#endif /* LWIP_ARP */
+    
+  }
+}
+
+/**
+ * Bring an interface down, disabling any traffic processing.
+ *
+ * @note: Enabling DHCP on a down interface will make it come
+ * up once configured.
+ * 
+ * @see dhcp_start()
+ */ 
+void netif_set_down(struct netif *netif)
+{
+  if ( netif->flags & NETIF_FLAG_UP )
+    {
+      netif->flags &= ~NETIF_FLAG_UP;
+#if LWIP_SNMP
+      snmp_get_sysuptime(&netif->ts);
+#endif
+      
+      NETIF_LINK_CALLBACK(netif);
+      NETIF_STATUS_CALLBACK(netif);
+    }
+}
+
+/**
+ * Ask if an interface is up
+ */ 
+u8_t netif_is_up(struct netif *netif)
+{
+  return (netif->flags & NETIF_FLAG_UP)?1:0;
+}
+
+#if LWIP_NETIF_STATUS_CALLBACK
+/**
+ * Set callback to be called when interface is brought up/down
+ */
+void netif_set_status_callback(struct netif *netif, void (* status_callback)(struct netif *netif ))
+{
+    if ( netif )
+        netif->status_callback = status_callback;
+}
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+
+#if LWIP_NETIF_LINK_CALLBACK
+/**
+ * Called by a driver when its link goes up
+ */
+void netif_set_link_up(struct netif *netif )
+{
+  netif->flags |= NETIF_FLAG_LINK_UP;
+
+#if LWIP_ARP
+  /* For Ethernet network interfaces, we would like to send a "gratuitous ARP" */ 
+  if (netif->flags & NETIF_FLAG_ETHARP) {
+    etharp_gratuitous(netif);
+  }
+#endif /* LWIP_ARP */
+
+#if LWIP_IGMP
+  /* resend IGMP memberships */
+  if (netif->flags & NETIF_FLAG_IGMP) {
+    igmp_report_groups( netif);
+  }
+#endif /* LWIP_IGMP */
+
+  NETIF_LINK_CALLBACK(netif);
+}
+
+/**
+ * Called by a driver when its link goes down
+ */
+void netif_set_link_down(struct netif *netif )
+{
+  netif->flags &= ~NETIF_FLAG_LINK_UP;
+  NETIF_LINK_CALLBACK(netif);
+}
+
+/**
+ * Ask if a link is up
+ */ 
+u8_t netif_is_link_up(struct netif *netif)
+{
+  return (netif->flags & NETIF_FLAG_LINK_UP) ? 1 : 0;
+}
+
+/**
+ * Set callback to be called when link is brought up/down
+ */
+void netif_set_link_callback(struct netif *netif, void (* link_callback)(struct netif *netif ))
+{
+  if (netif) {
+    netif->link_callback = link_callback;
+  }
+}
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+
+#if ENABLE_LOOPBACK
+/**
+ * Send an IP packet to be received on the same netif (loopif-like).
+ * The pbuf is simply copied and handed back to netif->input.
+ * In multithreaded mode, this is done directly since netif->input must put
+ * the packet on a queue.
+ * In callback mode, the packet is put on an internal queue and is fed to
+ * netif->input by netif_poll().
+ *
+ * @param netif the lwip network interface structure
+ * @param p the (IP) packet to 'send'
+ * @param ipaddr the ip address to send the packet to (not used)
+ * @return ERR_OK if the packet has been sent
+ *         ERR_MEM if the pbuf used to copy the packet couldn't be allocated
+ */
+err_t
+netif_loop_output(struct netif *netif, struct pbuf *p,
+       struct ip_addr *ipaddr)
+{
+  struct pbuf *r;
+  err_t err;
+  struct pbuf *last;
+#if LWIP_LOOPBACK_MAX_PBUFS
+  u8_t clen = 0;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+  SYS_ARCH_DECL_PROTECT(lev);
+  LWIP_UNUSED_ARG(ipaddr);
+
+  /* Allocate a new pbuf */
+  r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
+  if (r == NULL) {
+    return ERR_MEM;
+  }
+#if LWIP_LOOPBACK_MAX_PBUFS
+  clen = pbuf_clen(r);
+  /* check for overflow or too many pbuf on queue */
+  if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
+    ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
+      pbuf_free(r);
+      r = NULL;
+      return ERR_MEM;
+  }
+  netif->loop_cnt_current += clen;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+
+  /* Copy the whole pbuf queue p into the single pbuf r */
+  if ((err = pbuf_copy(r, p)) != ERR_OK) {
+    pbuf_free(r);
+    r = NULL;
+    return err;
+  }
+
+  /* Put the packet on a linked list which gets emptied through calling
+     netif_poll(). */
+
+  /* let last point to the last pbuf in chain r */
+  for (last = r; last->next != NULL; last = last->next);
+
+  SYS_ARCH_PROTECT(lev);
+  if(netif->loop_first != NULL) {
+    LWIP_ASSERT("if first != NULL, last must also be != NULL", netif->loop_last != NULL);
+    netif->loop_last->next = r;
+    netif->loop_last = last;
+  } else {
+    netif->loop_first = r;
+    netif->loop_last = last;
+  }
+  SYS_ARCH_UNPROTECT(lev);
+
+#if LWIP_NETIF_LOOPBACK_MULTITHREADING
+  /* For multithreading environment, schedule a call to netif_poll */
+  tcpip_callback((void (*)(void *))(netif_poll), netif);
+#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
+
+  return ERR_OK;
+}
+
+/**
+ * Call netif_poll() in the main loop of your application. This is to prevent
+ * reentering non-reentrant functions like tcp_input(). Packets passed to
+ * netif_loop_output() are put on a list that is passed to netif->input() by
+ * netif_poll().
+ */
+void
+netif_poll(struct netif *netif)
+{
+  struct pbuf *in;
+  SYS_ARCH_DECL_PROTECT(lev);
+
+  do {
+    /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is protected */
+    SYS_ARCH_PROTECT(lev);
+    in = netif->loop_first;
+    if(in != NULL) {
+      struct pbuf *in_end = in;
+#if LWIP_LOOPBACK_MAX_PBUFS
+      u8_t clen = pbuf_clen(in);
+      /* adjust the number of pbufs on queue */
+      LWIP_ASSERT("netif->loop_cnt_current underflow",
+        ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
+      netif->loop_cnt_current -= clen;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+      while(in_end->len != in_end->tot_len) {
+        LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!", in_end->next != NULL);
+        in_end = in_end->next;
+      }
+      /* 'in_end' now points to the last pbuf from 'in' */
+      if(in_end == netif->loop_last) {
+        /* this was the last pbuf in the list */
+        netif->loop_first = netif->loop_last = NULL;
+      } else {
+        /* pop the pbuf off the list */
+        netif->loop_first = in_end->next;
+        LWIP_ASSERT("should not be null since first != last!", netif->loop_first != NULL);
+      }
+      /* De-queue the pbuf from its successors on the 'loop_' list. */
+      in_end->next = NULL;
+    }
+    SYS_ARCH_UNPROTECT(lev);
+
+    if(in != NULL) {
+      /* loopback packets are always IP packets! */
+      if(ip_input(in, netif) != ERR_OK) {
+        pbuf_free(in);
+      }
+      /* Don't reference the packet any more! */
+      in = NULL;
+    }
+  /* go on while there is a packet on the list */
+  } while(netif->loop_first != NULL);
+}
+
+#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
+/**
+ * Calls netif_poll() for every netif on the netif_list.
+ */
+void
+netif_poll_all(void)
+{
+  struct netif *netif = netif_list;
+  /* loop through netifs */
+  while (netif != NULL) {
+    netif_poll(netif);
+    /* proceed to next network interface */
+    netif = netif->next;
+  }
+}
+#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
+#endif /* ENABLE_LOOPBACK */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/pbuf.c b/firmware/x300/lwip/lwip-1.3.1/src/core/pbuf.c
new file mode 100644
index 000000000..50b22c354
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/pbuf.c
@@ -0,0 +1,895 @@
+/**
+ * @file
+ * Packet buffer management
+ *
+ * Packets are built from the pbuf data structure. It supports dynamic
+ * memory allocation for packet contents or can reference externally
+ * managed packet contents both in RAM and ROM. Quick allocation for
+ * incoming packets is provided through pools with fixed sized pbufs.
+ *
+ * A packet may span over multiple pbufs, chained as a singly linked
+ * list. This is called a "pbuf chain".
+ *
+ * Multiple packets may be queued, also using this singly linked list.
+ * This is called a "packet queue".
+ * 
+ * So, a packet queue consists of one or more pbuf chains, each of
+ * which consist of one or more pbufs. CURRENTLY, PACKET QUEUES ARE
+ * NOT SUPPORTED!!! Use helper structs to queue multiple packets.
+ * 
+ * The differences between a pbuf chain and a packet queue are very
+ * precise but subtle. 
+ *
+ * The last pbuf of a packet has a ->tot_len field that equals the
+ * ->len field. It can be found by traversing the list. If the last
+ * pbuf of a packet has a ->next field other than NULL, more packets
+ * are on the queue.
+ *
+ * Therefore, looping through a pbuf of a single packet, has an
+ * loop end condition (tot_len == p->len), NOT (next == NULL).
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/stats.h"
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+#include "arch/perf.h"
+#if TCP_QUEUE_OOSEQ
+#include "lwip/tcp.h"
+#endif
+
+#include <string.h>
+
+#define SIZEOF_STRUCT_PBUF        LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf))
+/* Since the pool is created in memp, PBUF_POOL_BUFSIZE will be automatically
+   aligned there. Therefore, PBUF_POOL_BUFSIZE_ALIGNED can be used here. */
+#define PBUF_POOL_BUFSIZE_ALIGNED LWIP_MEM_ALIGN_SIZE(PBUF_POOL_BUFSIZE)
+
+#if TCP_QUEUE_OOSEQ
+#define ALLOC_POOL_PBUF(p) do { (p) = alloc_pool_pbuf(); } while (0)
+#else
+#define ALLOC_POOL_PBUF(p) do { (p) = memp_malloc(MEMP_PBUF_POOL); } while (0)
+#endif
+
+
+#if TCP_QUEUE_OOSEQ
+/**
+ * Attempt to reclaim some memory from queued out-of-sequence TCP segments
+ * if we run out of pool pbufs. It's better to give priority to new packets
+ * if we're running out.
+ *
+ * @return the allocated pbuf.
+ */
+static struct pbuf *
+alloc_pool_pbuf(void)
+{
+  struct tcp_pcb *pcb;
+  struct pbuf *p;
+
+retry:
+  p = memp_malloc(MEMP_PBUF_POOL);
+  if (NULL == p) {
+    for (pcb=tcp_active_pcbs; NULL != pcb; pcb = pcb->next) {
+      if (NULL != pcb->ooseq) {
+        tcp_segs_free(pcb->ooseq);
+        pcb->ooseq = NULL;
+        goto retry;
+      }
+    }
+  }
+  return p;
+}
+#endif /* TCP_QUEUE_OOSEQ */
+
+/**
+ * Allocates a pbuf of the given type (possibly a chain for PBUF_POOL type).
+ *
+ * The actual memory allocated for the pbuf is determined by the
+ * layer at which the pbuf is allocated and the requested size
+ * (from the size parameter).
+ *
+ * @param layer flag to define header size
+ * @param length size of the pbuf's payload
+ * @param type this parameter decides how and where the pbuf
+ * should be allocated as follows:
+ *
+ * - PBUF_RAM: buffer memory for pbuf is allocated as one large
+ *             chunk. This includes protocol headers as well.
+ * - PBUF_ROM: no buffer memory is allocated for the pbuf, even for
+ *             protocol headers. Additional headers must be prepended
+ *             by allocating another pbuf and chain in to the front of
+ *             the ROM pbuf. It is assumed that the memory used is really
+ *             similar to ROM in that it is immutable and will not be
+ *             changed. Memory which is dynamic should generally not
+ *             be attached to PBUF_ROM pbufs. Use PBUF_REF instead.
+ * - PBUF_REF: no buffer memory is allocated for the pbuf, even for
+ *             protocol headers. It is assumed that the pbuf is only
+ *             being used in a single thread. If the pbuf gets queued,
+ *             then pbuf_take should be called to copy the buffer.
+ * - PBUF_POOL: the pbuf is allocated as a pbuf chain, with pbufs from
+ *              the pbuf pool that is allocated during pbuf_init().
+ *
+ * @return the allocated pbuf. If multiple pbufs where allocated, this
+ * is the first pbuf of a pbuf chain.
+ */
+struct pbuf *
+pbuf_alloc(pbuf_layer layer, u16_t length, pbuf_type type)
+{
+  struct pbuf *p, *q, *r;
+  u16_t offset;
+  s32_t rem_len; /* remaining length */
+  LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 3, ("pbuf_alloc(length=%"U16_F")\n", length));
+
+  /* determine header offset */
+  offset = 0;
+  switch (layer) {
+  case PBUF_TRANSPORT:
+    /* add room for transport (often TCP) layer header */
+    offset += PBUF_TRANSPORT_HLEN;
+    /* FALLTHROUGH */
+  case PBUF_IP:
+    /* add room for IP layer header */
+    offset += PBUF_IP_HLEN;
+    /* FALLTHROUGH */
+  case PBUF_LINK:
+    /* add room for link layer header */
+    offset += PBUF_LINK_HLEN;
+    break;
+  case PBUF_RAW:
+    break;
+  default:
+    LWIP_ASSERT("pbuf_alloc: bad pbuf layer", 0);
+    return NULL;
+  }
+
+  switch (type) {
+  case PBUF_POOL:
+    /* allocate head of pbuf chain into p */
+    ALLOC_POOL_PBUF(p);
+    LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 3, ("pbuf_alloc: allocated pbuf %p\n", (void *)p));
+    if (p == NULL) {
+      return NULL;
+    }
+    p->type = type;
+    p->next = NULL;
+
+    /* make the payload pointer point 'offset' bytes into pbuf data memory */
+    p->payload = LWIP_MEM_ALIGN((void *)((u8_t *)p + (SIZEOF_STRUCT_PBUF + offset)));
+    LWIP_ASSERT("pbuf_alloc: pbuf p->payload properly aligned",
+            ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0);
+    /* the total length of the pbuf chain is the requested size */
+    p->tot_len = length;
+    /* set the length of the first pbuf in the chain */
+    p->len = LWIP_MIN(length, PBUF_POOL_BUFSIZE_ALIGNED - LWIP_MEM_ALIGN_SIZE(offset));
+    LWIP_ASSERT("check p->payload + p->len does not overflow pbuf",
+                ((u8_t*)p->payload + p->len <=
+                 (u8_t*)p + SIZEOF_STRUCT_PBUF + PBUF_POOL_BUFSIZE_ALIGNED));
+    LWIP_ASSERT("PBUF_POOL_BUFSIZE must be bigger than MEM_ALIGNMENT",
+      (PBUF_POOL_BUFSIZE_ALIGNED - LWIP_MEM_ALIGN_SIZE(offset)) > 0 );
+    /* set reference count (needed here in case we fail) */
+    p->ref = 1;
+
+    /* now allocate the tail of the pbuf chain */
+
+    /* remember first pbuf for linkage in next iteration */
+    r = p;
+    /* remaining length to be allocated */
+    rem_len = length - p->len;
+    /* any remaining pbufs to be allocated? */
+    while (rem_len > 0) {
+      ALLOC_POOL_PBUF(q);
+      if (q == NULL) {
+        /* free chain so far allocated */
+        pbuf_free(p);
+        /* bail out unsuccesfully */
+        return NULL;
+      }
+      q->type = type;
+      q->flags = 0;
+      q->next = NULL;
+      /* make previous pbuf point to this pbuf */
+      r->next = q;
+      /* set total length of this pbuf and next in chain */
+      LWIP_ASSERT("rem_len < max_u16_t", rem_len < 0xffff);
+      q->tot_len = (u16_t)rem_len;
+      /* this pbuf length is pool size, unless smaller sized tail */
+      q->len = LWIP_MIN((u16_t)rem_len, PBUF_POOL_BUFSIZE_ALIGNED);
+      q->payload = (void *)((u8_t *)q + SIZEOF_STRUCT_PBUF);
+      LWIP_ASSERT("pbuf_alloc: pbuf q->payload properly aligned",
+              ((mem_ptr_t)q->payload % MEM_ALIGNMENT) == 0);
+      LWIP_ASSERT("check p->payload + p->len does not overflow pbuf",
+                  ((u8_t*)p->payload + p->len <=
+                   (u8_t*)p + SIZEOF_STRUCT_PBUF + PBUF_POOL_BUFSIZE_ALIGNED));
+      q->ref = 1;
+      /* calculate remaining length to be allocated */
+      rem_len -= q->len;
+      /* remember this pbuf for linkage in next iteration */
+      r = q;
+    }
+    /* end of chain */
+    /*r->next = NULL;*/
+
+    break;
+  case PBUF_RAM:
+    /* If pbuf is to be allocated in RAM, allocate memory for it. */
+    p = (struct pbuf*)mem_malloc(LWIP_MEM_ALIGN_SIZE(SIZEOF_STRUCT_PBUF + offset) + LWIP_MEM_ALIGN_SIZE(length));
+    if (p == NULL) {
+      return NULL;
+    }
+    /* Set up internal structure of the pbuf. */
+    p->payload = LWIP_MEM_ALIGN((void *)((u8_t *)p + SIZEOF_STRUCT_PBUF + offset));
+    p->len = p->tot_len = length;
+    p->next = NULL;
+    p->type = type;
+
+    LWIP_ASSERT("pbuf_alloc: pbuf->payload properly aligned",
+           ((mem_ptr_t)p->payload % MEM_ALIGNMENT) == 0);
+    break;
+  /* pbuf references existing (non-volatile static constant) ROM payload? */
+  case PBUF_ROM:
+  /* pbuf references existing (externally allocated) RAM payload? */
+  case PBUF_REF:
+    /* only allocate memory for the pbuf structure */
+    p = memp_malloc(MEMP_PBUF);
+    if (p == NULL) {
+      LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 2, ("pbuf_alloc: Could not allocate MEMP_PBUF for PBUF_%s.\n",
+                  (type == PBUF_ROM) ? "ROM" : "REF"));
+      return NULL;
+    }
+    /* caller must set this field properly, afterwards */
+    p->payload = NULL;
+    p->len = p->tot_len = length;
+    p->next = NULL;
+    p->type = type;
+    break;
+  default:
+    LWIP_ASSERT("pbuf_alloc: erroneous type", 0);
+    return NULL;
+  }
+  /* set reference count */
+  p->ref = 1;
+  /* set flags */
+  p->flags = 0;
+  LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 3, ("pbuf_alloc(length=%"U16_F") == %p\n", length, (void *)p));
+  return p;
+}
+
+
+/**
+ * Shrink a pbuf chain to a desired length.
+ *
+ * @param p pbuf to shrink.
+ * @param new_len desired new length of pbuf chain
+ *
+ * Depending on the desired length, the first few pbufs in a chain might
+ * be skipped and left unchanged. The new last pbuf in the chain will be
+ * resized, and any remaining pbufs will be freed.
+ *
+ * @note If the pbuf is ROM/REF, only the ->tot_len and ->len fields are adjusted.
+ * @note May not be called on a packet queue.
+ *
+ * @note Despite its name, pbuf_realloc cannot grow the size of a pbuf (chain).
+ */
+void
+pbuf_realloc(struct pbuf *p, u16_t new_len)
+{
+  struct pbuf *q;
+  u16_t rem_len; /* remaining length */
+  s32_t grow;
+
+  LWIP_ASSERT("pbuf_realloc: p != NULL", p != NULL);
+  LWIP_ASSERT("pbuf_realloc: sane p->type", p->type == PBUF_POOL ||
+              p->type == PBUF_ROM ||
+              p->type == PBUF_RAM ||
+              p->type == PBUF_REF);
+
+  /* desired length larger than current length? */
+  if (new_len >= p->tot_len) {
+    /* enlarging not yet supported */
+    return;
+  }
+
+  /* the pbuf chain grows by (new_len - p->tot_len) bytes
+   * (which may be negative in case of shrinking) */
+  grow = new_len - p->tot_len;
+
+  /* first, step over any pbufs that should remain in the chain */
+  rem_len = new_len;
+  q = p;
+  /* should this pbuf be kept? */
+  while (rem_len > q->len) {
+    /* decrease remaining length by pbuf length */
+    rem_len -= q->len;
+    /* decrease total length indicator */
+    LWIP_ASSERT("grow < max_u16_t", grow < 0xffff);
+    q->tot_len += (u16_t)grow;
+    /* proceed to next pbuf in chain */
+    q = q->next;
+    LWIP_ASSERT("pbuf_realloc: q != NULL", q != NULL);
+  }
+  /* we have now reached the new last pbuf (in q) */
+  /* rem_len == desired length for pbuf q */
+
+  /* shrink allocated memory for PBUF_RAM */
+  /* (other types merely adjust their length fields */
+  if ((q->type == PBUF_RAM) && (rem_len != q->len)) {
+    /* reallocate and adjust the length of the pbuf that will be split */
+    q = mem_realloc(q, (u8_t *)q->payload - (u8_t *)q + rem_len);
+    LWIP_ASSERT("mem_realloc give q == NULL", q != NULL);
+  }
+  /* adjust length fields for new last pbuf */
+  q->len = rem_len;
+  q->tot_len = q->len;
+
+  /* any remaining pbufs in chain? */
+  if (q->next != NULL) {
+    /* free remaining pbufs in chain */
+    pbuf_free(q->next);
+  }
+  /* q is last packet in chain */
+  q->next = NULL;
+
+}
+
+/**
+ * Adjusts the payload pointer to hide or reveal headers in the payload.
+ *
+ * Adjusts the ->payload pointer so that space for a header
+ * (dis)appears in the pbuf payload.
+ *
+ * The ->payload, ->tot_len and ->len fields are adjusted.
+ *
+ * @param p pbuf to change the header size.
+ * @param header_size_increment Number of bytes to increment header size which
+ * increases the size of the pbuf. New space is on the front.
+ * (Using a negative value decreases the header size.)
+ * If hdr_size_inc is 0, this function does nothing and returns succesful.
+ *
+ * PBUF_ROM and PBUF_REF type buffers cannot have their sizes increased, so
+ * the call will fail. A check is made that the increase in header size does
+ * not move the payload pointer in front of the start of the buffer.
+ * @return non-zero on failure, zero on success.
+ *
+ */
+u8_t
+pbuf_header(struct pbuf *p, s16_t header_size_increment)
+{
+  u16_t type;
+  void *payload;
+  u16_t increment_magnitude;
+
+  LWIP_ASSERT("p != NULL", p != NULL);
+  if ((header_size_increment == 0) || (p == NULL))
+    return 0;
+ 
+  if (header_size_increment < 0){
+    increment_magnitude = -header_size_increment;
+    /* Check that we aren't going to move off the end of the pbuf */
+    LWIP_ERROR("increment_magnitude <= p->len", (increment_magnitude <= p->len), return 1;);
+  } else {
+    increment_magnitude = header_size_increment;
+#if 0
+    /* Can't assert these as some callers speculatively call
+         pbuf_header() to see if it's OK.  Will return 1 below instead. */
+    /* Check that we've got the correct type of pbuf to work with */
+    LWIP_ASSERT("p->type == PBUF_RAM || p->type == PBUF_POOL", 
+                p->type == PBUF_RAM || p->type == PBUF_POOL);
+    /* Check that we aren't going to move off the beginning of the pbuf */
+    LWIP_ASSERT("p->payload - increment_magnitude >= p + SIZEOF_STRUCT_PBUF",
+                (u8_t *)p->payload - increment_magnitude >= (u8_t *)p + SIZEOF_STRUCT_PBUF);
+#endif
+  }
+
+  type = p->type;
+  /* remember current payload pointer */
+  payload = p->payload;
+
+  /* pbuf types containing payloads? */
+  if (type == PBUF_RAM || type == PBUF_POOL) {
+    /* set new payload pointer */
+    p->payload = (u8_t *)p->payload - header_size_increment;
+    /* boundary check fails? */
+    if ((u8_t *)p->payload < (u8_t *)p + SIZEOF_STRUCT_PBUF) {
+      LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_header: failed as %p < %p (not enough space for new header size)\n",
+        (void *)p->payload,
+        (void *)(p + 1)));\
+      /* restore old payload pointer */
+      p->payload = payload;
+      /* bail out unsuccesfully */
+      return 1;
+    }
+  /* pbuf types refering to external payloads? */
+  } else if (type == PBUF_REF || type == PBUF_ROM) {
+    /* hide a header in the payload? */
+    if ((header_size_increment < 0) && (increment_magnitude <= p->len)) {
+      /* increase payload pointer */
+      p->payload = (u8_t *)p->payload - header_size_increment;
+    } else {
+      /* cannot expand payload to front (yet!)
+       * bail out unsuccesfully */
+      return 1;
+    }
+  }
+  else {
+    /* Unknown type */
+    LWIP_ASSERT("bad pbuf type", 0);
+    return 1;
+  }
+  /* modify pbuf length fields */
+  p->len += header_size_increment;
+  p->tot_len += header_size_increment;
+
+  LWIP_DEBUGF(PBUF_DEBUG, ("pbuf_header: old %p new %p (%"S16_F")\n",
+    (void *)payload, (void *)p->payload, header_size_increment));
+
+  return 0;
+}
+
+/**
+ * Dereference a pbuf chain or queue and deallocate any no-longer-used
+ * pbufs at the head of this chain or queue.
+ *
+ * Decrements the pbuf reference count. If it reaches zero, the pbuf is
+ * deallocated.
+ *
+ * For a pbuf chain, this is repeated for each pbuf in the chain,
+ * up to the first pbuf which has a non-zero reference count after
+ * decrementing. So, when all reference counts are one, the whole
+ * chain is free'd.
+ *
+ * @param p The pbuf (chain) to be dereferenced.
+ *
+ * @return the number of pbufs that were de-allocated
+ * from the head of the chain.
+ *
+ * @note MUST NOT be called on a packet queue (Not verified to work yet).
+ * @note the reference counter of a pbuf equals the number of pointers
+ * that refer to the pbuf (or into the pbuf).
+ *
+ * @internal examples:
+ *
+ * Assuming existing chains a->b->c with the following reference
+ * counts, calling pbuf_free(a) results in:
+ * 
+ * 1->2->3 becomes ...1->3
+ * 3->3->3 becomes 2->3->3
+ * 1->1->2 becomes ......1
+ * 2->1->1 becomes 1->1->1
+ * 1->1->1 becomes .......
+ *
+ */
+u8_t
+pbuf_free(struct pbuf *p)
+{
+  u16_t type;
+  struct pbuf *q;
+  u8_t count;
+
+  if (p == NULL) {
+    LWIP_ASSERT("p != NULL", p != NULL);
+    /* if assertions are disabled, proceed with debug output */
+    LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 2, ("pbuf_free(p == NULL) was called.\n"));
+    return 0;
+  }
+  LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 3, ("pbuf_free(%p)\n", (void *)p));
+
+  PERF_START;
+
+  LWIP_ASSERT("pbuf_free: sane type",
+    p->type == PBUF_RAM || p->type == PBUF_ROM ||
+    p->type == PBUF_REF || p->type == PBUF_POOL);
+
+  count = 0;
+  /* de-allocate all consecutive pbufs from the head of the chain that
+   * obtain a zero reference count after decrementing*/
+  while (p != NULL) {
+    u16_t ref;
+    SYS_ARCH_DECL_PROTECT(old_level);
+    /* Since decrementing ref cannot be guaranteed to be a single machine operation
+     * we must protect it. We put the new ref into a local variable to prevent
+     * further protection. */
+    SYS_ARCH_PROTECT(old_level);
+    /* all pbufs in a chain are referenced at least once */
+    LWIP_ASSERT("pbuf_free: p->ref > 0", p->ref > 0);
+    /* decrease reference count (number of pointers to pbuf) */
+    ref = --(p->ref);
+    SYS_ARCH_UNPROTECT(old_level);
+    /* this pbuf is no longer referenced to? */
+    if (ref == 0) {
+      /* remember next pbuf in chain for next iteration */
+      q = p->next;
+      LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_free: deallocating %p\n", (void *)p));
+      type = p->type;
+      /* is this a pbuf from the pool? */
+      if (type == PBUF_POOL) {
+        memp_free(MEMP_PBUF_POOL, p);
+      /* is this a ROM or RAM referencing pbuf? */
+      } else if (type == PBUF_ROM || type == PBUF_REF) {
+        memp_free(MEMP_PBUF, p);
+      /* type == PBUF_RAM */
+      } else {
+        mem_free(p);
+      }
+      count++;
+      /* proceed to next pbuf */
+      p = q;
+    /* p->ref > 0, this pbuf is still referenced to */
+    /* (and so the remaining pbufs in chain as well) */
+    } else {
+      LWIP_DEBUGF( PBUF_DEBUG | 2, ("pbuf_free: %p has ref %"U16_F", ending here.\n", (void *)p, ref));
+      /* stop walking through the chain */
+      p = NULL;
+    }
+  }
+  PERF_STOP("pbuf_free");
+  /* return number of de-allocated pbufs */
+  return count;
+}
+
+/**
+ * Count number of pbufs in a chain
+ *
+ * @param p first pbuf of chain
+ * @return the number of pbufs in a chain
+ */
+
+u8_t
+pbuf_clen(struct pbuf *p)
+{
+  u8_t len;
+
+  len = 0;
+  while (p != NULL) {
+    ++len;
+    p = p->next;
+  }
+  return len;
+}
+
+/**
+ * Increment the reference count of the pbuf.
+ *
+ * @param p pbuf to increase reference counter of
+ *
+ */
+void
+pbuf_ref(struct pbuf *p)
+{
+  SYS_ARCH_DECL_PROTECT(old_level);
+  /* pbuf given? */
+  if (p != NULL) {
+    SYS_ARCH_PROTECT(old_level);
+    ++(p->ref);
+    SYS_ARCH_UNPROTECT(old_level);
+  }
+}
+
+/**
+ * Concatenate two pbufs (each may be a pbuf chain) and take over
+ * the caller's reference of the tail pbuf.
+ * 
+ * @note The caller MAY NOT reference the tail pbuf afterwards.
+ * Use pbuf_chain() for that purpose.
+ * 
+ * @see pbuf_chain()
+ */
+
+void
+pbuf_cat(struct pbuf *h, struct pbuf *t)
+{
+  struct pbuf *p;
+
+  LWIP_ERROR("(h != NULL) && (t != NULL) (programmer violates API)",
+             ((h != NULL) && (t != NULL)), return;);
+
+  /* proceed to last pbuf of chain */
+  for (p = h; p->next != NULL; p = p->next) {
+    /* add total length of second chain to all totals of first chain */
+    p->tot_len += t->tot_len;
+  }
+  /* { p is last pbuf of first h chain, p->next == NULL } */
+  LWIP_ASSERT("p->tot_len == p->len (of last pbuf in chain)", p->tot_len == p->len);
+  LWIP_ASSERT("p->next == NULL", p->next == NULL);
+  /* add total length of second chain to last pbuf total of first chain */
+  p->tot_len += t->tot_len;
+  /* chain last pbuf of head (p) with first of tail (t) */
+  p->next = t;
+  /* p->next now references t, but the caller will drop its reference to t,
+   * so netto there is no change to the reference count of t.
+   */
+}
+
+/**
+ * Chain two pbufs (or pbuf chains) together.
+ * 
+ * The caller MUST call pbuf_free(t) once it has stopped
+ * using it. Use pbuf_cat() instead if you no longer use t.
+ * 
+ * @param h head pbuf (chain)
+ * @param t tail pbuf (chain)
+ * @note The pbufs MUST belong to the same packet.
+ * @note MAY NOT be called on a packet queue.
+ *
+ * The ->tot_len fields of all pbufs of the head chain are adjusted.
+ * The ->next field of the last pbuf of the head chain is adjusted.
+ * The ->ref field of the first pbuf of the tail chain is adjusted.
+ *
+ */
+void
+pbuf_chain(struct pbuf *h, struct pbuf *t)
+{
+  pbuf_cat(h, t);
+  /* t is now referenced by h */
+  pbuf_ref(t);
+  LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_FRESH | 2, ("pbuf_chain: %p references %p\n", (void *)h, (void *)t));
+}
+
+/**
+ * Dechains the first pbuf from its succeeding pbufs in the chain.
+ *
+ * Makes p->tot_len field equal to p->len.
+ * @param p pbuf to dechain
+ * @return remainder of the pbuf chain, or NULL if it was de-allocated.
+ * @note May not be called on a packet queue.
+ */
+struct pbuf *
+pbuf_dechain(struct pbuf *p)
+{
+  struct pbuf *q;
+  u8_t tail_gone = 1;
+  /* tail */
+  q = p->next;
+  /* pbuf has successor in chain? */
+  if (q != NULL) {
+    /* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */
+    LWIP_ASSERT("p->tot_len == p->len + q->tot_len", q->tot_len == p->tot_len - p->len);
+    /* enforce invariant if assertion is disabled */
+    q->tot_len = p->tot_len - p->len;
+    /* decouple pbuf from remainder */
+    p->next = NULL;
+    /* total length of pbuf p is its own length only */
+    p->tot_len = p->len;
+    /* q is no longer referenced by p, free it */
+    LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_STATE, ("pbuf_dechain: unreferencing %p\n", (void *)q));
+    tail_gone = pbuf_free(q);
+    if (tail_gone > 0) {
+      LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_STATE,
+                  ("pbuf_dechain: deallocated %p (as it is no longer referenced)\n", (void *)q));
+    }
+    /* return remaining tail or NULL if deallocated */
+  }
+  /* assert tot_len invariant: (p->tot_len == p->len + (p->next? p->next->tot_len: 0) */
+  LWIP_ASSERT("p->tot_len == p->len", p->tot_len == p->len);
+  return ((tail_gone > 0) ? NULL : q);
+}
+
+/**
+ *
+ * Create PBUF_RAM copies of pbufs.
+ *
+ * Used to queue packets on behalf of the lwIP stack, such as
+ * ARP based queueing.
+ *
+ * @note You MUST explicitly use p = pbuf_take(p);
+ *
+ * @note Only one packet is copied, no packet queue!
+ *
+ * @param p_to pbuf destination of the copy
+ * @param p_from pbuf source of the copy
+ *
+ * @return ERR_OK if pbuf was copied
+ *         ERR_ARG if one of the pbufs is NULL or p_to is not big
+ *                 enough to hold p_from
+ */
+err_t
+pbuf_copy(struct pbuf *p_to, struct pbuf *p_from)
+{
+  u16_t offset_to=0, offset_from=0, len;
+
+  LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 3, ("pbuf_copy(%p, %p)\n",
+    (void*)p_to, (void*)p_from));
+
+  /* is the target big enough to hold the source? */
+  LWIP_ERROR("pbuf_copy: target not big enough to hold source", ((p_to != NULL) &&
+             (p_from != NULL) && (p_to->tot_len >= p_from->tot_len)), return ERR_ARG;);
+
+  /* iterate through pbuf chain */
+  do
+  {
+    LWIP_ASSERT("p_to != NULL", p_to != NULL);
+    /* copy one part of the original chain */
+    if ((p_to->len - offset_to) >= (p_from->len - offset_from)) {
+      /* complete current p_from fits into current p_to */
+      len = p_from->len - offset_from;
+    } else {
+      /* current p_from does not fit into current p_to */
+      len = p_to->len - offset_to;
+    }
+    MEMCPY((u8_t*)p_to->payload + offset_to, (u8_t*)p_from->payload + offset_from, len);
+    offset_to += len;
+    offset_from += len;
+    LWIP_ASSERT("offset_to <= p_to->len", offset_to <= p_to->len);
+    if (offset_to == p_to->len) {
+      /* on to next p_to (if any) */
+      offset_to = 0;
+      p_to = p_to->next;
+    }
+    LWIP_ASSERT("offset_from <= p_from->len", offset_from <= p_from->len);
+    if (offset_from >= p_from->len) {
+      /* on to next p_from (if any) */
+      offset_from = 0;
+      p_from = p_from->next;
+    }
+
+    if((p_from != NULL) && (p_from->len == p_from->tot_len)) {
+      /* don't copy more than one packet! */
+      LWIP_ERROR("pbuf_copy() does not allow packet queues!\n",
+                 (p_from->next == NULL), return ERR_VAL;);
+    }
+    if((p_to != NULL) && (p_to->len == p_to->tot_len)) {
+      /* don't copy more than one packet! */
+      LWIP_ERROR("pbuf_copy() does not allow packet queues!\n",
+                  (p_to->next == NULL), return ERR_VAL;);
+    }
+  } while (p_from);
+  LWIP_DEBUGF(PBUF_DEBUG | LWIP_DBG_TRACE | 1, ("pbuf_copy: end of chain reached.\n"));
+  return ERR_OK;
+}
+
+/**
+ * Copy (part of) the contents of a packet buffer
+ * to an application supplied buffer.
+ *
+ * @param buf the pbuf from which to copy data
+ * @param dataptr the application supplied buffer
+ * @param len length of data to copy (dataptr must be big enough). No more 
+ * than buf->tot_len will be copied, irrespective of len
+ * @param offset offset into the packet buffer from where to begin copying len bytes
+ * @return the number of bytes copied, or 0 on failure
+ */
+u16_t
+pbuf_copy_partial(struct pbuf *buf, void *dataptr, u16_t len, u16_t offset)
+{
+  struct pbuf *p;
+  u16_t left;
+  u16_t buf_copy_len;
+  u16_t copied_total = 0;
+
+  LWIP_ERROR("pbuf_copy_partial: invalid buf", (buf != NULL), return 0;);
+  LWIP_ERROR("pbuf_copy_partial: invalid dataptr", (dataptr != NULL), return 0;);
+
+  left = 0;
+
+  if((buf == NULL) || (dataptr == NULL)) {
+    return 0;
+  }
+
+  /* Note some systems use byte copy if dataptr or one of the pbuf payload pointers are unaligned. */
+  for(p = buf; len != 0 && p != NULL; p = p->next) {
+    if ((offset != 0) && (offset >= p->len)) {
+      /* don't copy from this buffer -> on to the next */
+      offset -= p->len;
+    } else {
+      /* copy from this buffer. maybe only partially. */
+      buf_copy_len = p->len - offset;
+      if (buf_copy_len > len)
+          buf_copy_len = len;
+      /* copy the necessary parts of the buffer */
+      MEMCPY(&((char*)dataptr)[left], &((char*)p->payload)[offset], buf_copy_len);
+      copied_total += buf_copy_len;
+      left += buf_copy_len;
+      len -= buf_copy_len;
+      offset = 0;
+    }
+  }
+  return copied_total;
+}
+
+/**
+ * Copy application supplied data into a pbuf.
+ * This function can only be used to copy the equivalent of buf->tot_len data.
+ *
+ * @param buf pbuf to fill with data
+ * @param dataptr application supplied data buffer
+ * @param len length of the application supplied data buffer
+ *
+ * @return ERR_OK if successful, ERR_MEM if the pbuf is not big enough
+ */
+err_t
+pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len)
+{
+  struct pbuf *p;
+  u16_t buf_copy_len;
+  u16_t total_copy_len = len;
+  u16_t copied_total = 0;
+
+  LWIP_ERROR("pbuf_take: invalid buf", (buf != NULL), return 0;);
+  LWIP_ERROR("pbuf_take: invalid dataptr", (dataptr != NULL), return 0;);
+
+  if ((buf == NULL) || (dataptr == NULL) || (buf->tot_len < len)) {
+    return ERR_ARG;
+  }
+
+  /* Note some systems use byte copy if dataptr or one of the pbuf payload pointers are unaligned. */
+  for(p = buf; total_copy_len != 0; p = p->next) {
+    LWIP_ASSERT("pbuf_take: invalid pbuf", p != NULL);
+    buf_copy_len = total_copy_len;
+    if (buf_copy_len > p->len) {
+      /* this pbuf cannot hold all remaining data */
+      buf_copy_len = p->len;
+    }
+    /* copy the necessary parts of the buffer */
+    MEMCPY(p->payload, &((char*)dataptr)[copied_total], buf_copy_len);
+    total_copy_len -= buf_copy_len;
+    copied_total += buf_copy_len;
+  }
+  LWIP_ASSERT("did not copy all data", total_copy_len == 0 && copied_total == len);
+  return ERR_OK;
+}
+
+/**
+ * Creates a single pbuf out of a queue of pbufs.
+ *
+ * @remark: The source pbuf 'p' is not freed by this function because that can
+ *          be illegal in some places!
+ *
+ * @param p the source pbuf
+ * @param layer pbuf_layer of the new pbuf
+ *
+ * @return a new, single pbuf (p->next is NULL)
+ *         or the old pbuf if allocation fails
+ */
+struct pbuf*
+pbuf_coalesce(struct pbuf *p, pbuf_layer layer)
+{
+  struct pbuf *q;
+  err_t err;
+  if (p->next == NULL) {
+    return p;
+  }
+  q = pbuf_alloc(layer, p->tot_len, PBUF_RAM);
+  if (q == NULL) {
+    /* @todo: what do we do now? */
+    return p;
+  }
+  err = pbuf_copy(q, p);
+  LWIP_ASSERT("pbuf_copy failed", err == ERR_OK);
+  pbuf_free(p);
+  return q;
+}
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/raw.c b/firmware/x300/lwip/lwip-1.3.1/src/core/raw.c
new file mode 100644
index 000000000..589950e75
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/raw.c
@@ -0,0 +1,353 @@
+/**
+ * @file
+ * Implementation of raw protocol PCBs for low-level handling of
+ * different types of protocols besides (or overriding) those
+ * already available in lwIP.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/def.h"
+#include "lwip/memp.h"
+#include "lwip/inet.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/raw.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+#include "arch/perf.h"
+
+#include <string.h>
+
+/** The list of RAW PCBs */
+static struct raw_pcb *raw_pcbs;
+
+/**
+ * Determine if in incoming IP packet is covered by a RAW PCB
+ * and if so, pass it to a user-provided receive callback function.
+ *
+ * Given an incoming IP datagram (as a chain of pbufs) this function
+ * finds a corresponding RAW PCB and calls the corresponding receive
+ * callback function.
+ *
+ * @param p pbuf to be demultiplexed to a RAW PCB.
+ * @param inp network interface on which the datagram was received.
+ * @return - 1 if the packet has been eaten by a RAW PCB receive
+ *           callback function. The caller MAY NOT not reference the
+ *           packet any longer, and MAY NOT call pbuf_free().
+ * @return - 0 if packet is not eaten (pbuf is still referenced by the
+ *           caller).
+ *
+ */
+u8_t
+raw_input(struct pbuf *p, struct netif *inp)
+{
+  struct raw_pcb *pcb, *prev;
+  struct ip_hdr *iphdr;
+  s16_t proto;
+  u8_t eaten = 0;
+
+  LWIP_UNUSED_ARG(inp);
+
+  iphdr = p->payload;
+  proto = IPH_PROTO(iphdr);
+
+  prev = NULL;
+  pcb = raw_pcbs;
+  /* loop through all raw pcbs until the packet is eaten by one */
+  /* this allows multiple pcbs to match against the packet by design */
+  while ((eaten == 0) && (pcb != NULL)) {
+    if (pcb->protocol == proto) {
+#if IP_SOF_BROADCAST_RECV
+      /* broadcast filter? */
+      if ((pcb->so_options & SOF_BROADCAST) || !ip_addr_isbroadcast(&(iphdr->dest), inp))
+#endif /* IP_SOF_BROADCAST_RECV */
+      {
+        /* receive callback function available? */
+        if (pcb->recv != NULL) {
+          /* the receive callback function did not eat the packet? */
+          if (pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src)) != 0) {
+            /* receive function ate the packet */
+            p = NULL;
+            eaten = 1;
+            if (prev != NULL) {
+            /* move the pcb to the front of raw_pcbs so that is
+               found faster next time */
+              prev->next = pcb->next;
+              pcb->next = raw_pcbs;
+              raw_pcbs = pcb;
+            }
+          }
+        }
+        /* no receive callback function was set for this raw PCB */
+      }
+      /* drop the packet */
+    }
+    prev = pcb;
+    pcb = pcb->next;
+  }
+  return eaten;
+}
+
+/**
+ * Bind a RAW PCB.
+ *
+ * @param pcb RAW PCB to be bound with a local address ipaddr.
+ * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
+ * bind to all local interfaces.
+ *
+ * @return lwIP error code.
+ * - ERR_OK. Successful. No error occured.
+ * - ERR_USE. The specified IP address is already bound to by
+ * another RAW PCB.
+ *
+ * @see raw_disconnect()
+ */
+err_t
+raw_bind(struct raw_pcb *pcb, struct ip_addr *ipaddr)
+{
+  ip_addr_set(&pcb->local_ip, ipaddr);
+  return ERR_OK;
+}
+
+/**
+ * Connect an RAW PCB. This function is required by upper layers
+ * of lwip. Using the raw api you could use raw_sendto() instead
+ *
+ * This will associate the RAW PCB with the remote address.
+ *
+ * @param pcb RAW PCB to be connected with remote address ipaddr and port.
+ * @param ipaddr remote IP address to connect with.
+ *
+ * @return lwIP error code
+ *
+ * @see raw_disconnect() and raw_sendto()
+ */
+err_t
+raw_connect(struct raw_pcb *pcb, struct ip_addr *ipaddr)
+{
+  ip_addr_set(&pcb->remote_ip, ipaddr);
+  return ERR_OK;
+}
+
+
+/**
+ * Set the callback function for received packets that match the
+ * raw PCB's protocol and binding. 
+ * 
+ * The callback function MUST either
+ * - eat the packet by calling pbuf_free() and returning non-zero. The
+ *   packet will not be passed to other raw PCBs or other protocol layers.
+ * - not free the packet, and return zero. The packet will be matched
+ *   against further PCBs and/or forwarded to another protocol layers.
+ * 
+ * @return non-zero if the packet was free()d, zero if the packet remains
+ * available for others.
+ */
+void
+raw_recv(struct raw_pcb *pcb,
+         u8_t (* recv)(void *arg, struct raw_pcb *upcb, struct pbuf *p,
+                      struct ip_addr *addr),
+         void *recv_arg)
+{
+  /* remember recv() callback and user data */
+  pcb->recv = recv;
+  pcb->recv_arg = recv_arg;
+}
+
+/**
+ * Send the raw IP packet to the given address. Note that actually you cannot
+ * modify the IP headers (this is inconsistent with the receive callback where
+ * you actually get the IP headers), you can only specify the IP payload here.
+ * It requires some more changes in lwIP. (there will be a raw_send() function
+ * then.)
+ *
+ * @param pcb the raw pcb which to send
+ * @param p the IP payload to send
+ * @param ipaddr the destination address of the IP packet
+ *
+ */
+err_t
+raw_sendto(struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr)
+{
+  err_t err;
+  struct netif *netif;
+  struct ip_addr *src_ip;
+  struct pbuf *q; /* q will be sent down the stack */
+  
+  LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_sendto\n"));
+  
+  /* not enough space to add an IP header to first pbuf in given p chain? */
+  if (pbuf_header(p, IP_HLEN)) {
+    /* allocate header in new pbuf */
+    q = pbuf_alloc(PBUF_IP, 0, PBUF_RAM);
+    /* new header pbuf could not be allocated? */
+    if (q == NULL) {
+      LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 2, ("raw_sendto: could not allocate header\n"));
+      return ERR_MEM;
+    }
+    /* chain header q in front of given pbuf p */
+    pbuf_chain(q, p);
+    /* { first pbuf q points to header pbuf } */
+    LWIP_DEBUGF(RAW_DEBUG, ("raw_sendto: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
+  }  else {
+    /* first pbuf q equals given pbuf */
+    q = p;
+    if(pbuf_header(q, -IP_HLEN)) {
+      LWIP_ASSERT("Can't restore header we just removed!", 0);
+      return ERR_MEM;
+    }
+  }
+
+  if ((netif = ip_route(ipaddr)) == NULL) {
+    LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_sendto: No route to 0x%"X32_F"\n", ipaddr->addr));
+    /* free any temporary header pbuf allocated by pbuf_header() */
+    if (q != p) {
+      pbuf_free(q);
+    }
+    return ERR_RTE;
+  }
+
+#if IP_SOF_BROADCAST
+  /* broadcast filter? */
+  if ( ((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(ipaddr, netif) ) {
+    LWIP_DEBUGF(RAW_DEBUG | 1, ("raw_sendto: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
+    /* free any temporary header pbuf allocated by pbuf_header() */
+    if (q != p) {
+      pbuf_free(q);
+    }
+    return ERR_VAL;
+  }
+#endif /* IP_SOF_BROADCAST */
+
+  if (ip_addr_isany(&pcb->local_ip)) {
+    /* use outgoing network interface IP address as source address */
+    src_ip = &(netif->ip_addr);
+  } else {
+    /* use RAW PCB local IP address as source address */
+    src_ip = &(pcb->local_ip);
+  }
+
+#if LWIP_NETIF_HWADDRHINT
+  netif->addr_hint = &(pcb->addr_hint);
+#endif /* LWIP_NETIF_HWADDRHINT*/
+  err = ip_output_if (q, src_ip, ipaddr, pcb->ttl, pcb->tos, pcb->protocol, netif);
+#if LWIP_NETIF_HWADDRHINT
+  netif->addr_hint = NULL;
+#endif /* LWIP_NETIF_HWADDRHINT*/
+
+  /* did we chain a header earlier? */
+  if (q != p) {
+    /* free the header */
+    pbuf_free(q);
+  }
+  return err;
+}
+
+/**
+ * Send the raw IP packet to the address given by raw_connect()
+ *
+ * @param pcb the raw pcb which to send
+ * @param p the IP payload to send
+ *
+ */
+err_t
+raw_send(struct raw_pcb *pcb, struct pbuf *p)
+{
+  return raw_sendto(pcb, p, &pcb->remote_ip);
+}
+
+/**
+ * Remove an RAW PCB.
+ *
+ * @param pcb RAW PCB to be removed. The PCB is removed from the list of
+ * RAW PCB's and the data structure is freed from memory.
+ *
+ * @see raw_new()
+ */
+void
+raw_remove(struct raw_pcb *pcb)
+{
+  struct raw_pcb *pcb2;
+  /* pcb to be removed is first in list? */
+  if (raw_pcbs == pcb) {
+    /* make list start at 2nd pcb */
+    raw_pcbs = raw_pcbs->next;
+    /* pcb not 1st in list */
+  } else {
+    for(pcb2 = raw_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
+      /* find pcb in raw_pcbs list */
+      if (pcb2->next != NULL && pcb2->next == pcb) {
+        /* remove pcb from list */
+        pcb2->next = pcb->next;
+      }
+    }
+  }
+  memp_free(MEMP_RAW_PCB, pcb);
+}
+
+/**
+ * Create a RAW PCB.
+ *
+ * @return The RAW PCB which was created. NULL if the PCB data structure
+ * could not be allocated.
+ *
+ * @param proto the protocol number of the IPs payload (e.g. IP_PROTO_ICMP)
+ *
+ * @see raw_remove()
+ */
+struct raw_pcb *
+raw_new(u8_t proto) {
+  struct raw_pcb *pcb;
+
+  LWIP_DEBUGF(RAW_DEBUG | LWIP_DBG_TRACE | 3, ("raw_new\n"));
+
+  pcb = memp_malloc(MEMP_RAW_PCB);
+  /* could allocate RAW PCB? */
+  if (pcb != NULL) {
+    /* initialize PCB to all zeroes */
+    memset(pcb, 0, sizeof(struct raw_pcb));
+    pcb->protocol = proto;
+    pcb->ttl = RAW_TTL;
+    pcb->next = raw_pcbs;
+    raw_pcbs = pcb;
+  }
+  return pcb;
+}
+
+#endif /* LWIP_RAW */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/asn1_dec.c b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/asn1_dec.c
new file mode 100644
index 000000000..650fb4037
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/asn1_dec.c
@@ -0,0 +1,657 @@
+/**
+ * @file
+ * Abstract Syntax Notation One (ISO 8824, 8825) decoding
+ *
+ * @todo not optimised (yet), favor correctness over speed, favor speed over size
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/snmp_asn1.h"
+
+/**
+ * Retrieves type field from incoming pbuf chain.
+ *
+ * @param p points to a pbuf holding an ASN1 coded type field
+ * @param ofs points to the offset within the pbuf chain of the ASN1 coded type field
+ * @param type return ASN1 type
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
+ */
+err_t
+snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+      *type = *msg_ptr;
+      return ERR_OK;
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Decodes length field from incoming pbuf chain into host length.
+ *
+ * @param p points to a pbuf holding an ASN1 coded length
+ * @param ofs points to the offset within the pbuf chain of the ASN1 coded length
+ * @param octets_used returns number of octets used by the length code
+ * @param length return host order length, upto 64k
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
+ */
+err_t
+snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+
+      if (*msg_ptr < 0x80)
+      {
+        /* primitive definite length format */
+        *octets_used = 1;
+        *length = *msg_ptr;
+        return ERR_OK;
+      }
+      else if (*msg_ptr == 0x80)
+      {
+        /* constructed indefinite length format, termination with two zero octets */
+        u8_t zeros;
+        u8_t i;
+
+        *length = 0;
+        zeros = 0;
+        while (zeros != 2)
+        {
+          i = 2;
+          while (i > 0)
+          {
+            i--;
+            (*length) += 1;
+            ofs += 1;
+            if (ofs >= plen)
+            {
+              /* next octet in next pbuf */
+              p = p->next;
+              if (p == NULL) { return ERR_ARG; }
+              msg_ptr = p->payload;
+              plen += p->len;
+            }
+            else
+            {
+              /* next octet in same pbuf */
+              msg_ptr++;
+            }
+            if (*msg_ptr == 0)
+            {
+              zeros++;
+              if (zeros == 2)
+              {
+                /* stop while (i > 0) */
+                i = 0;
+              }
+            }
+            else
+            {
+              zeros = 0;
+            }
+          }
+        }
+        *octets_used = 1;
+        return ERR_OK;
+      }
+      else if (*msg_ptr == 0x81)
+      {
+        /* constructed definite length format, one octet */
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+        *length = *msg_ptr;
+        *octets_used = 2;
+        return ERR_OK;
+      }
+      else if (*msg_ptr == 0x82)
+      {
+        u8_t i;
+
+        /* constructed definite length format, two octets */
+        i = 2;
+        while (i > 0)
+        {
+          i--;
+          ofs += 1;
+          if (ofs >= plen)
+          {
+            /* next octet in next pbuf */
+            p = p->next;
+            if (p == NULL) { return ERR_ARG; }
+            msg_ptr = p->payload;
+            plen += p->len;
+          }
+          else
+          {
+            /* next octet in same pbuf */
+            msg_ptr++;
+          }
+          if (i == 0)
+          {
+            /* least significant length octet */
+            *length |= *msg_ptr;
+          }
+          else
+          {
+            /* most significant length octet */
+            *length = (*msg_ptr) << 8;
+          }
+        }
+        *octets_used = 3;
+        return ERR_OK;
+      }
+      else
+      {
+        /* constructed definite length format 3..127 octets, this is too big (>64k) */
+        /**  @todo: do we need to accept inefficient codings with many leading zero's? */
+        *octets_used = 1 + ((*msg_ptr) & 0x7f);
+        return ERR_ARG;
+      }
+    }
+    p = p->next;
+  }
+
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Decodes positive integer (counter, gauge, timeticks) into u32_t.
+ *
+ * @param p points to a pbuf holding an ASN1 coded integer
+ * @param ofs points to the offset within the pbuf chain of the ASN1 coded integer
+ * @param len length of the coded integer field
+ * @param value return host order integer
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
+ *
+ * @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded
+ * as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value
+ * of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!!
+ */
+err_t
+snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+      if ((len > 0) && (len < 6))
+      {
+        /* start from zero */
+        *value = 0;
+        if (*msg_ptr & 0x80)
+        {
+          /* negative, expecting zero sign bit! */
+          return ERR_ARG;
+        }
+        else
+        {
+          /* positive */
+          if ((len > 1) && (*msg_ptr == 0))
+          {
+            /* skip leading "sign byte" octet 0x00 */
+            len--;
+            ofs += 1;
+            if (ofs >= plen)
+            {
+              /* next octet in next pbuf */
+              p = p->next;
+              if (p == NULL) { return ERR_ARG; }
+              msg_ptr = p->payload;
+              plen += p->len;
+            }
+            else
+            {
+              /* next octet in same pbuf */
+              msg_ptr++;
+            }
+          }
+        }
+        /* OR octets with value */
+        while (len > 1)
+        {
+          len--;
+          *value |= *msg_ptr;
+          *value <<= 8;
+          ofs += 1;
+          if (ofs >= plen)
+          {
+            /* next octet in next pbuf */
+            p = p->next;
+            if (p == NULL) { return ERR_ARG; }
+            msg_ptr = p->payload;
+            plen += p->len;
+          }
+          else
+          {
+            /* next octet in same pbuf */
+            msg_ptr++;
+          }
+        }
+        *value |= *msg_ptr;
+        return ERR_OK;
+      }
+      else
+      {
+        return ERR_ARG;
+      }
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Decodes integer into s32_t.
+ *
+ * @param p points to a pbuf holding an ASN1 coded integer
+ * @param ofs points to the offset within the pbuf chain of the ASN1 coded integer
+ * @param len length of the coded integer field
+ * @param value return host order integer
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
+ *
+ * @note ASN coded integers are _always_ signed!
+ */
+err_t
+snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+#if BYTE_ORDER == LITTLE_ENDIAN
+  u8_t *lsb_ptr = (u8_t*)value;
+#endif
+#if BYTE_ORDER == BIG_ENDIAN
+  u8_t *lsb_ptr = (u8_t*)value + sizeof(s32_t) - 1;
+#endif
+  u8_t sign;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+      if ((len > 0) && (len < 5))
+      {
+        if (*msg_ptr & 0x80)
+        {
+          /* negative, start from -1 */
+          *value = -1;
+          sign = 1;
+        }
+        else
+        {
+          /* positive, start from 0 */
+          *value = 0;
+          sign = 0;
+        }
+        /* OR/AND octets with value */
+        while (len > 1)
+        {
+          len--;
+          if (sign)
+          {
+            *lsb_ptr &= *msg_ptr;
+            *value <<= 8;
+            *lsb_ptr |= 255;
+          }
+          else
+          {
+            *lsb_ptr |= *msg_ptr;
+            *value <<= 8;
+          }
+          ofs += 1;
+          if (ofs >= plen)
+          {
+            /* next octet in next pbuf */
+            p = p->next;
+            if (p == NULL) { return ERR_ARG; }
+            msg_ptr = p->payload;
+            plen += p->len;
+          }
+          else
+          {
+            /* next octet in same pbuf */
+            msg_ptr++;
+          }
+        }
+        if (sign)
+        {
+          *lsb_ptr &= *msg_ptr;
+        }
+        else
+        {
+          *lsb_ptr |= *msg_ptr;
+        }
+        return ERR_OK;
+      }
+      else
+      {
+        return ERR_ARG;
+      }
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Decodes object identifier from incoming message into array of s32_t.
+ *
+ * @param p points to a pbuf holding an ASN1 coded object identifier
+ * @param ofs points to the offset within the pbuf chain of the ASN1 coded object identifier
+ * @param len length of the coded object identifier
+ * @param oid return object identifier struct
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
+ */
+err_t
+snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+  s32_t *oid_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+
+      oid->len = 0;
+      oid_ptr = &oid->id[0];
+      if (len > 0)
+      {
+        /* first compressed octet */
+        if (*msg_ptr == 0x2B)
+        {
+          /* (most) common case 1.3 (iso.org) */
+          *oid_ptr = 1;
+          oid_ptr++;
+          *oid_ptr = 3;
+          oid_ptr++;
+        }
+        else if (*msg_ptr < 40)
+        {
+          *oid_ptr = 0;
+          oid_ptr++;
+          *oid_ptr = *msg_ptr;
+          oid_ptr++;
+        }
+        else if (*msg_ptr < 80)
+        {
+          *oid_ptr = 1;
+          oid_ptr++;
+          *oid_ptr = (*msg_ptr) - 40;
+          oid_ptr++;
+        }
+        else
+        {
+          *oid_ptr = 2;
+          oid_ptr++;
+          *oid_ptr = (*msg_ptr) - 80;
+          oid_ptr++;
+        }
+        oid->len = 2;
+      }
+      else
+      {
+        /* accepting zero length identifiers e.g. for
+           getnext operation. uncommon but valid */
+        return ERR_OK;
+      }
+      len--;
+      if (len > 0)
+      {
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+          plen += p->len;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+      }
+      while ((len > 0) && (oid->len < LWIP_SNMP_OBJ_ID_LEN))
+      {
+        /* sub-identifier uses multiple octets */
+        if (*msg_ptr & 0x80)
+        {
+          s32_t sub_id = 0;
+
+          while ((*msg_ptr & 0x80) && (len > 1))
+          {
+            len--;
+            sub_id = (sub_id << 7) + (*msg_ptr & ~0x80);
+            ofs += 1;
+            if (ofs >= plen)
+            {
+              /* next octet in next pbuf */
+              p = p->next;
+              if (p == NULL) { return ERR_ARG; }
+              msg_ptr = p->payload;
+              plen += p->len;
+            }
+            else
+            {
+              /* next octet in same pbuf */
+              msg_ptr++;
+            }
+          }
+          if (!(*msg_ptr & 0x80) && (len > 0))
+          {
+            /* last octet sub-identifier */
+            len--;
+            sub_id = (sub_id << 7) + *msg_ptr;
+            *oid_ptr = sub_id;
+          }
+        }
+        else
+        {
+          /* !(*msg_ptr & 0x80) sub-identifier uses single octet */
+          len--;
+          *oid_ptr = *msg_ptr;
+        }
+        if (len > 0)
+        {
+          /* remaining oid bytes available ... */
+          ofs += 1;
+          if (ofs >= plen)
+          {
+            /* next octet in next pbuf */
+            p = p->next;
+            if (p == NULL) { return ERR_ARG; }
+            msg_ptr = p->payload;
+            plen += p->len;
+          }
+          else
+          {
+            /* next octet in same pbuf */
+            msg_ptr++;
+          }
+        }
+        oid_ptr++;
+        oid->len++;
+      }
+      if (len == 0)
+      {
+        /* len == 0, end of oid */
+        return ERR_OK;
+      }
+      else
+      {
+        /* len > 0, oid->len == LWIP_SNMP_OBJ_ID_LEN or malformed encoding */
+        return ERR_ARG;
+      }
+
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Decodes (copies) raw data (ip-addresses, octet strings, opaque encoding)
+ * from incoming message into array.
+ *
+ * @param p points to a pbuf holding an ASN1 coded raw data
+ * @param ofs points to the offset within the pbuf chain of the ASN1 coded raw data
+ * @param len length of the coded raw data (zero is valid, e.g. empty string!)
+ * @param raw_len length of the raw return value
+ * @param raw return raw bytes
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) decode
+ */
+err_t
+snmp_asn1_dec_raw(struct pbuf *p, u16_t ofs, u16_t len, u16_t raw_len, u8_t *raw)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  if (len > 0)
+  {
+    plen = 0;
+    while (p != NULL)
+    {
+      base = plen;
+      plen += p->len;
+      if (ofs < plen)
+      {
+        msg_ptr = p->payload;
+        msg_ptr += ofs - base;
+        if (raw_len >= len)
+        {
+          while (len > 1)
+          {
+            /* copy len - 1 octets */
+            len--;
+            *raw = *msg_ptr;
+            raw++;
+            ofs += 1;
+            if (ofs >= plen)
+            {
+              /* next octet in next pbuf */
+              p = p->next;
+              if (p == NULL) { return ERR_ARG; }
+              msg_ptr = p->payload;
+              plen += p->len;
+            }
+            else
+            {
+              /* next octet in same pbuf */
+              msg_ptr++;
+            }
+          }
+          /* copy last octet */
+          *raw = *msg_ptr;
+          return ERR_OK;
+        }
+        else
+        {
+          /* raw_len < len, not enough dst space */
+          return ERR_ARG;
+        }
+      }
+      p = p->next;
+    }
+    /* p == NULL, ofs >= plen */
+    return ERR_ARG;
+  }
+  else
+  {
+    /* len == 0, empty string */
+    return ERR_OK;
+  }
+}
+
+#endif /* LWIP_SNMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/asn1_enc.c b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/asn1_enc.c
new file mode 100644
index 000000000..77af6b4ba
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/asn1_enc.c
@@ -0,0 +1,611 @@
+/**
+ * @file
+ * Abstract Syntax Notation One (ISO 8824, 8825) encoding
+ *
+ * @todo not optimised (yet), favor correctness over speed, favor speed over size
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/snmp_asn1.h"
+
+/**
+ * Returns octet count for length.
+ *
+ * @param length
+ * @param octets_needed points to the return value
+ */
+void
+snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed)
+{
+  if (length < 0x80U)
+  {
+    *octets_needed = 1;
+  }
+  else if (length < 0x100U)
+  {
+    *octets_needed = 2;
+  }
+  else
+  {
+    *octets_needed = 3;
+  }
+}
+
+/**
+ * Returns octet count for an u32_t.
+ *
+ * @param value
+ * @param octets_needed points to the return value
+ *
+ * @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded
+ * as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value
+ * of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!!
+ */
+void
+snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed)
+{
+  if (value < 0x80UL)
+  {
+    *octets_needed = 1;
+  }
+  else if (value < 0x8000UL)
+  {
+    *octets_needed = 2;
+  }
+  else if (value < 0x800000UL)
+  {
+    *octets_needed = 3;
+  }
+  else if (value < 0x80000000UL)
+  {
+    *octets_needed = 4;
+  }
+  else
+  {
+    *octets_needed = 5;
+  }
+}
+
+/**
+ * Returns octet count for an s32_t.
+ *
+ * @param value
+ * @param octets_needed points to the return value
+ *
+ * @note ASN coded integers are _always_ signed.
+ */
+void
+snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed)
+{
+  if (value < 0)
+  {
+    value = ~value;
+  }
+  if (value < 0x80L)
+  {
+    *octets_needed = 1;
+  }
+  else if (value < 0x8000L)
+  {
+    *octets_needed = 2;
+  }
+  else if (value < 0x800000L)
+  {
+    *octets_needed = 3;
+  }
+  else
+  {
+    *octets_needed = 4;
+  }
+}
+
+/**
+ * Returns octet count for an object identifier.
+ *
+ * @param ident_len object identifier array length
+ * @param ident points to object identifier array
+ * @param octets_needed points to the return value
+ */
+void
+snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed)
+{
+  s32_t sub_id;
+  u8_t cnt;
+
+  cnt = 0;
+  if (ident_len > 1)
+  {
+    /* compressed prefix in one octet */
+    cnt++;
+    ident_len -= 2;
+    ident += 2;
+  }
+  while(ident_len > 0)
+  {
+    ident_len--;
+    sub_id = *ident;
+
+    sub_id >>= 7;
+    cnt++;
+    while(sub_id > 0)
+    {
+      sub_id >>= 7;
+      cnt++;
+    }
+    ident++;
+  }
+  *octets_needed = cnt;
+}
+
+/**
+ * Encodes ASN type field into a pbuf chained ASN1 msg.
+ *
+ * @param p points to output pbuf to encode value into
+ * @param ofs points to the offset within the pbuf chain
+ * @param type input ASN1 type
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
+ */
+err_t
+snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+      *msg_ptr = type;
+      return ERR_OK;
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Encodes host order length field into a pbuf chained ASN1 msg.
+ *
+ * @param p points to output pbuf to encode length into
+ * @param ofs points to the offset within the pbuf chain
+ * @param length is the host order length to be encoded
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
+ */
+err_t
+snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+
+      if (length < 0x80)
+      {
+        *msg_ptr = length;
+        return ERR_OK;
+      }
+      else if (length < 0x100)
+      {
+        *msg_ptr = 0x81;
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+        *msg_ptr = length;
+        return ERR_OK;
+      }
+      else
+      {
+        u8_t i;
+
+        /* length >= 0x100 && length <= 0xFFFF */
+        *msg_ptr = 0x82;
+        i = 2;
+        while (i > 0)
+        {
+          i--;
+          ofs += 1;
+          if (ofs >= plen)
+          {
+            /* next octet in next pbuf */
+            p = p->next;
+            if (p == NULL) { return ERR_ARG; }
+            msg_ptr = p->payload;
+            plen += p->len;
+          }
+          else
+          {
+            /* next octet in same pbuf */
+            msg_ptr++;
+          }
+          if (i == 0)
+          {
+            /* least significant length octet */
+            *msg_ptr = length;
+          }
+          else
+          {
+            /* most significant length octet */
+            *msg_ptr = length >> 8;
+          }
+        }
+        return ERR_OK;
+      }
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Encodes u32_t (counter, gauge, timeticks) into a pbuf chained ASN1 msg.
+ *
+ * @param p points to output pbuf to encode value into
+ * @param ofs points to the offset within the pbuf chain
+ * @param octets_needed encoding length (from snmp_asn1_enc_u32t_cnt())
+ * @param value is the host order u32_t value to be encoded
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
+ *
+ * @see snmp_asn1_enc_u32t_cnt()
+ */
+err_t
+snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, u32_t value)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+
+      if (octets_needed == 5)
+      {
+        /* not enough bits in 'value' add leading 0x00 */
+        octets_needed--;
+        *msg_ptr = 0x00;
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+          plen += p->len;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+      }
+      while (octets_needed > 1)
+      {
+        octets_needed--;
+        *msg_ptr = value >> (octets_needed << 3);
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+          plen += p->len;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+      }
+      /* (only) one least significant octet */
+      *msg_ptr = value;
+      return ERR_OK;
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Encodes s32_t integer into a pbuf chained ASN1 msg.
+ *
+ * @param p points to output pbuf to encode value into
+ * @param ofs points to the offset within the pbuf chain
+ * @param octets_needed encoding length (from snmp_asn1_enc_s32t_cnt())
+ * @param value is the host order s32_t value to be encoded
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
+ *
+ * @see snmp_asn1_enc_s32t_cnt()
+ */
+err_t
+snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, s32_t value)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+
+      while (octets_needed > 1)
+      {
+        octets_needed--;
+        *msg_ptr = value >> (octets_needed << 3);
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+          plen += p->len;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+      }
+      /* (only) one least significant octet */
+      *msg_ptr = value;
+      return ERR_OK;
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Encodes object identifier into a pbuf chained ASN1 msg.
+ *
+ * @param p points to output pbuf to encode oid into
+ * @param ofs points to the offset within the pbuf chain
+ * @param ident_len object identifier array length
+ * @param ident points to object identifier array
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
+ */
+err_t
+snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+
+      if (ident_len > 1)
+      {
+        if ((ident[0] == 1) && (ident[1] == 3))
+        {
+          /* compressed (most common) prefix .iso.org */
+          *msg_ptr = 0x2b;
+        }
+        else
+        {
+          /* calculate prefix */
+          *msg_ptr = (ident[0] * 40) + ident[1];
+        }
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+          plen += p->len;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+        ident_len -= 2;
+        ident += 2;
+      }
+      else
+      {
+/* @bug:  allow empty varbinds for symmetry (we must decode them for getnext), allow partial compression??  */
+        /* ident_len <= 1, at least we need zeroDotZero (0.0) (ident_len == 2) */
+        return ERR_ARG;
+      }
+      while (ident_len > 0)
+      {
+        s32_t sub_id;
+        u8_t shift, tail;
+
+        ident_len--;
+        sub_id = *ident;
+        tail = 0;
+        shift = 28;
+        while(shift > 0)
+        {
+          u8_t code;
+
+          code = sub_id >> shift;
+          if ((code != 0) || (tail != 0))
+          {
+            tail = 1;
+            *msg_ptr = code | 0x80;
+            ofs += 1;
+            if (ofs >= plen)
+            {
+              /* next octet in next pbuf */
+              p = p->next;
+              if (p == NULL) { return ERR_ARG; }
+              msg_ptr = p->payload;
+              plen += p->len;
+            }
+            else
+            {
+              /* next octet in same pbuf */
+              msg_ptr++;
+            }
+          }
+          shift -= 7;
+        }
+        *msg_ptr = (u8_t)sub_id & 0x7F;
+        if (ident_len > 0)
+        {
+          ofs += 1;
+          if (ofs >= plen)
+          {
+            /* next octet in next pbuf */
+            p = p->next;
+            if (p == NULL) { return ERR_ARG; }
+            msg_ptr = p->payload;
+            plen += p->len;
+          }
+          else
+          {
+            /* next octet in same pbuf */
+            msg_ptr++;
+          }
+        }
+        /* proceed to next sub-identifier */
+        ident++;
+      }
+      return ERR_OK;
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+/**
+ * Encodes raw data (octet string, opaque) into a pbuf chained ASN1 msg.
+ *
+ * @param p points to output pbuf to encode raw data into
+ * @param ofs points to the offset within the pbuf chain
+ * @param raw_len raw data length
+ * @param raw points raw data
+ * @return ERR_OK if successfull, ERR_ARG if we can't (or won't) encode
+ */
+err_t
+snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw)
+{
+  u16_t plen, base;
+  u8_t *msg_ptr;
+
+  plen = 0;
+  while (p != NULL)
+  {
+    base = plen;
+    plen += p->len;
+    if (ofs < plen)
+    {
+      msg_ptr = p->payload;
+      msg_ptr += ofs - base;
+
+      while (raw_len > 1)
+      {
+        /* copy raw_len - 1 octets */
+        raw_len--;
+        *msg_ptr = *raw;
+        raw++;
+        ofs += 1;
+        if (ofs >= plen)
+        {
+          /* next octet in next pbuf */
+          p = p->next;
+          if (p == NULL) { return ERR_ARG; }
+          msg_ptr = p->payload;
+          plen += p->len;
+        }
+        else
+        {
+          /* next octet in same pbuf */
+          msg_ptr++;
+        }
+      }
+      if (raw_len > 0)
+      {
+        /* copy last or single octet */
+        *msg_ptr = *raw;
+      }
+      return ERR_OK;
+    }
+    p = p->next;
+  }
+  /* p == NULL, ofs >= plen */
+  return ERR_ARG;
+}
+
+#endif /* LWIP_SNMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/mib2.c b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/mib2.c
new file mode 100644
index 000000000..33eeee66c
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/mib2.c
@@ -0,0 +1,4126 @@
+/**
+ * @file
+ * Management Information Base II (RFC1213) objects and functions.
+ *
+ * @note the object identifiers for this MIB-2 and private MIB tree
+ * must be kept in sorted ascending order. This to ensure correct getnext operation.
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/snmp.h"
+#include "lwip/netif.h"
+#include "lwip/ip.h"
+#include "lwip/ip_frag.h"
+#include "lwip/tcp.h"
+#include "lwip/udp.h"
+#include "lwip/snmp_asn1.h"
+#include "lwip/snmp_structs.h"
+#include "netif/etharp.h"
+
+/**
+ * IANA assigned enterprise ID for lwIP is 26381
+ * @see http://www.iana.org/assignments/enterprise-numbers
+ *
+ * @note this enterprise ID is assigned to the lwIP project,
+ * all object identifiers living under this ID are assigned
+ * by the lwIP maintainers (contact Christiaan Simons)!
+ * @note don't change this define, use snmp_set_sysobjid()
+ *
+ * If you need to create your own private MIB you'll need
+ * to apply for your own enterprise ID with IANA:
+ * http://www.iana.org/numbers.html
+ */
+#define SNMP_ENTERPRISE_ID 26381
+#define SNMP_SYSOBJID_LEN 7
+#define SNMP_SYSOBJID {1, 3, 6, 1, 4, 1, SNMP_ENTERPRISE_ID}
+
+#ifndef SNMP_SYSSERVICES
+#define SNMP_SYSSERVICES ((1 << 6) | (1 << 3) | ((IP_FORWARD) << 2))
+#endif
+
+#ifndef SNMP_GET_SYSUPTIME
+#define SNMP_GET_SYSUPTIME(sysuptime)
+#endif
+
+static void system_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void system_get_value(struct obj_def *od, u16_t len, void *value);
+static u8_t system_set_test(struct obj_def *od, u16_t len, void *value);
+static void system_set_value(struct obj_def *od, u16_t len, void *value);
+static void interfaces_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void interfaces_get_value(struct obj_def *od, u16_t len, void *value);
+static void ifentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void ifentry_get_value(struct obj_def *od, u16_t len, void *value);
+#if !SNMP_SAFE_REQUESTS
+static u8_t ifentry_set_test (struct obj_def *od, u16_t len, void *value);
+static void ifentry_set_value (struct obj_def *od, u16_t len, void *value);
+#endif /* SNMP_SAFE_REQUESTS */
+static void atentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void atentry_get_value(struct obj_def *od, u16_t len, void *value);
+static void ip_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void ip_get_value(struct obj_def *od, u16_t len, void *value);
+static u8_t ip_set_test(struct obj_def *od, u16_t len, void *value);
+static void ip_addrentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void ip_addrentry_get_value(struct obj_def *od, u16_t len, void *value);
+static void ip_rteentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void ip_rteentry_get_value(struct obj_def *od, u16_t len, void *value);
+static void ip_ntomentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void ip_ntomentry_get_value(struct obj_def *od, u16_t len, void *value);
+static void icmp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void icmp_get_value(struct obj_def *od, u16_t len, void *value);
+#if LWIP_TCP
+static void tcp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void tcp_get_value(struct obj_def *od, u16_t len, void *value);
+#ifdef THIS_SEEMS_UNUSED
+static void tcpconnentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void tcpconnentry_get_value(struct obj_def *od, u16_t len, void *value);
+#endif
+#endif
+static void udp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void udp_get_value(struct obj_def *od, u16_t len, void *value);
+static void udpentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void udpentry_get_value(struct obj_def *od, u16_t len, void *value);
+static void snmp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+static void snmp_get_value(struct obj_def *od, u16_t len, void *value);
+static u8_t snmp_set_test(struct obj_def *od, u16_t len, void *value);
+static void snmp_set_value(struct obj_def *od, u16_t len, void *value);
+
+
+/* snmp .1.3.6.1.2.1.11 */
+const mib_scalar_node snmp_scalar = {
+  &snmp_get_object_def,
+  &snmp_get_value,
+  &snmp_set_test,
+  &snmp_set_value,
+  MIB_NODE_SC,
+  0
+};
+const s32_t snmp_ids[28] = {
+  1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16,
+  17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30
+};
+struct mib_node* const snmp_nodes[28] = {
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar,
+  (struct mib_node* const)&snmp_scalar, (struct mib_node* const)&snmp_scalar
+};
+const struct mib_array_node snmp = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  28,
+  snmp_ids,
+  snmp_nodes
+};
+
+/* dot3 and EtherLike MIB not planned. (transmission .1.3.6.1.2.1.10) */
+/* historical (some say hysterical). (cmot .1.3.6.1.2.1.9) */
+/* lwIP has no EGP, thus may not implement it. (egp .1.3.6.1.2.1.8) */
+
+/* udp .1.3.6.1.2.1.7 */
+/** index root node for udpTable */
+struct mib_list_rootnode udp_root = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_LR,
+  0,
+  NULL,
+  NULL,
+  0
+};
+const s32_t udpentry_ids[2] = { 1, 2 };
+struct mib_node* const udpentry_nodes[2] = {
+  (struct mib_node* const)&udp_root, (struct mib_node* const)&udp_root,
+};
+const struct mib_array_node udpentry = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  2,
+  udpentry_ids,
+  udpentry_nodes
+};
+
+s32_t udptable_id = 1;
+struct mib_node* udptable_node = (struct mib_node* const)&udpentry;
+struct mib_ram_array_node udptable = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_RA,
+  0,
+  &udptable_id,
+  &udptable_node
+};
+
+const mib_scalar_node udp_scalar = {
+  &udp_get_object_def,
+  &udp_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_SC,
+  0
+};
+const s32_t udp_ids[5] = { 1, 2, 3, 4, 5 };
+struct mib_node* const udp_nodes[5] = {
+  (struct mib_node* const)&udp_scalar, (struct mib_node* const)&udp_scalar,
+  (struct mib_node* const)&udp_scalar, (struct mib_node* const)&udp_scalar,
+  (struct mib_node* const)&udptable
+};
+const struct mib_array_node udp = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  5,
+  udp_ids,
+  udp_nodes
+};
+
+/* tcp .1.3.6.1.2.1.6 */
+#if LWIP_TCP
+/* only if the TCP protocol is available may implement this group */
+/** index root node for tcpConnTable */
+struct mib_list_rootnode tcpconntree_root = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_LR,
+  0,
+  NULL,
+  NULL,
+  0
+};
+const s32_t tcpconnentry_ids[5] = { 1, 2, 3, 4, 5 };
+struct mib_node* const tcpconnentry_nodes[5] = {
+  (struct mib_node* const)&tcpconntree_root, (struct mib_node* const)&tcpconntree_root,
+  (struct mib_node* const)&tcpconntree_root, (struct mib_node* const)&tcpconntree_root,
+  (struct mib_node* const)&tcpconntree_root
+};
+const struct mib_array_node tcpconnentry = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  5,
+  tcpconnentry_ids,
+  tcpconnentry_nodes
+};
+
+s32_t tcpconntable_id = 1;
+struct mib_node* tcpconntable_node = (struct mib_node* const)&tcpconnentry;
+struct mib_ram_array_node tcpconntable = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_RA,
+/** @todo update maxlength when inserting / deleting from table
+   0 when table is empty, 1 when more than one entry */
+  0,
+  &tcpconntable_id,
+  &tcpconntable_node
+};
+
+const mib_scalar_node tcp_scalar = {
+  &tcp_get_object_def,
+  &tcp_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_SC,
+  0
+};
+const s32_t tcp_ids[15] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
+struct mib_node* const tcp_nodes[15] = {
+  (struct mib_node* const)&tcp_scalar, (struct mib_node* const)&tcp_scalar,
+  (struct mib_node* const)&tcp_scalar, (struct mib_node* const)&tcp_scalar,
+  (struct mib_node* const)&tcp_scalar, (struct mib_node* const)&tcp_scalar,
+  (struct mib_node* const)&tcp_scalar, (struct mib_node* const)&tcp_scalar,
+  (struct mib_node* const)&tcp_scalar, (struct mib_node* const)&tcp_scalar,
+  (struct mib_node* const)&tcp_scalar, (struct mib_node* const)&tcp_scalar,
+  (struct mib_node* const)&tcpconntable, (struct mib_node* const)&tcp_scalar,
+  (struct mib_node* const)&tcp_scalar
+};
+const struct mib_array_node tcp = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  15,
+  tcp_ids,
+  tcp_nodes
+};
+#endif
+
+/* icmp .1.3.6.1.2.1.5 */
+const mib_scalar_node icmp_scalar = {
+  &icmp_get_object_def,
+  &icmp_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_SC,
+  0
+};
+const s32_t icmp_ids[26] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 };
+struct mib_node* const icmp_nodes[26] = {
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar,
+  (struct mib_node* const)&icmp_scalar, (struct mib_node* const)&icmp_scalar
+};
+const struct mib_array_node icmp = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  26,
+  icmp_ids,
+  icmp_nodes
+};
+
+/** index root node for ipNetToMediaTable */
+struct mib_list_rootnode ipntomtree_root = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_LR,
+  0,
+  NULL,
+  NULL,
+  0
+};
+const s32_t ipntomentry_ids[4] = { 1, 2, 3, 4 };
+struct mib_node* const ipntomentry_nodes[4] = {
+  (struct mib_node* const)&ipntomtree_root, (struct mib_node* const)&ipntomtree_root,
+  (struct mib_node* const)&ipntomtree_root, (struct mib_node* const)&ipntomtree_root
+};
+const struct mib_array_node ipntomentry = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  4,
+  ipntomentry_ids,
+  ipntomentry_nodes
+};
+
+s32_t ipntomtable_id = 1;
+struct mib_node* ipntomtable_node = (struct mib_node* const)&ipntomentry;
+struct mib_ram_array_node ipntomtable = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_RA,
+  0,
+  &ipntomtable_id,
+  &ipntomtable_node
+};
+
+/** index root node for ipRouteTable */
+struct mib_list_rootnode iprtetree_root = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_LR,
+  0,
+  NULL,
+  NULL,
+  0
+};
+const s32_t iprteentry_ids[13] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 };
+struct mib_node* const iprteentry_nodes[13] = {
+  (struct mib_node* const)&iprtetree_root, (struct mib_node* const)&iprtetree_root,
+  (struct mib_node* const)&iprtetree_root, (struct mib_node* const)&iprtetree_root,
+  (struct mib_node* const)&iprtetree_root, (struct mib_node* const)&iprtetree_root,
+  (struct mib_node* const)&iprtetree_root, (struct mib_node* const)&iprtetree_root,
+  (struct mib_node* const)&iprtetree_root, (struct mib_node* const)&iprtetree_root,
+  (struct mib_node* const)&iprtetree_root, (struct mib_node* const)&iprtetree_root,
+  (struct mib_node* const)&iprtetree_root
+};
+const struct mib_array_node iprteentry = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  13,
+  iprteentry_ids,
+  iprteentry_nodes
+};
+
+s32_t iprtetable_id = 1;
+struct mib_node* iprtetable_node = (struct mib_node* const)&iprteentry;
+struct mib_ram_array_node iprtetable = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_RA,
+  0,
+  &iprtetable_id,
+  &iprtetable_node
+};
+
+/** index root node for ipAddrTable */
+struct mib_list_rootnode ipaddrtree_root = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_LR,
+  0,
+  NULL,
+  NULL,
+  0
+};
+const s32_t ipaddrentry_ids[5] = { 1, 2, 3, 4, 5 };
+struct mib_node* const ipaddrentry_nodes[5] = {
+  (struct mib_node* const)&ipaddrtree_root,
+  (struct mib_node* const)&ipaddrtree_root,
+  (struct mib_node* const)&ipaddrtree_root,
+  (struct mib_node* const)&ipaddrtree_root,
+  (struct mib_node* const)&ipaddrtree_root
+};
+const struct mib_array_node ipaddrentry = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  5,
+  ipaddrentry_ids,
+  ipaddrentry_nodes
+};
+
+s32_t ipaddrtable_id = 1;
+struct mib_node* ipaddrtable_node = (struct mib_node* const)&ipaddrentry;
+struct mib_ram_array_node ipaddrtable = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_RA,
+  0,
+  &ipaddrtable_id,
+  &ipaddrtable_node
+};
+
+/* ip .1.3.6.1.2.1.4 */
+const mib_scalar_node ip_scalar = {
+  &ip_get_object_def,
+  &ip_get_value,
+  &ip_set_test,
+  &noleafs_set_value,
+  MIB_NODE_SC,
+  0
+};
+const s32_t ip_ids[23] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 };
+struct mib_node* const ip_nodes[23] = {
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ip_scalar,
+  (struct mib_node* const)&ip_scalar, (struct mib_node* const)&ipaddrtable,
+  (struct mib_node* const)&iprtetable, (struct mib_node* const)&ipntomtable,
+  (struct mib_node* const)&ip_scalar
+};
+const struct mib_array_node mib2_ip = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  23,
+  ip_ids,
+  ip_nodes
+};
+
+/** index root node for atTable */
+struct mib_list_rootnode arptree_root = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_LR,
+  0,
+  NULL,
+  NULL,
+  0
+};
+const s32_t atentry_ids[3] = { 1, 2, 3 };
+struct mib_node* const atentry_nodes[3] = {
+  (struct mib_node* const)&arptree_root,
+  (struct mib_node* const)&arptree_root,
+  (struct mib_node* const)&arptree_root
+};
+const struct mib_array_node atentry = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  3,
+  atentry_ids,
+  atentry_nodes
+};
+
+const s32_t attable_id = 1;
+struct mib_node* const attable_node = (struct mib_node* const)&atentry;
+const struct mib_array_node attable = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  1,
+  &attable_id,
+  &attable_node
+};
+
+/* at .1.3.6.1.2.1.3 */
+s32_t at_id = 1;
+struct mib_node* mib2_at_node = (struct mib_node* const)&attable;
+struct mib_ram_array_node at = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_RA,
+  0,
+  &at_id,
+  &mib2_at_node
+};
+
+/** index root node for ifTable */
+struct mib_list_rootnode iflist_root = {
+  &ifentry_get_object_def,
+  &ifentry_get_value,
+#if SNMP_SAFE_REQUESTS
+  &noleafs_set_test,
+  &noleafs_set_value,
+#else /* SNMP_SAFE_REQUESTS */
+  &ifentry_set_test,
+  &ifentry_set_value,
+#endif /* SNMP_SAFE_REQUESTS */
+  MIB_NODE_LR,
+  0,
+  NULL,
+  NULL,
+  0
+};
+const s32_t ifentry_ids[22] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 };
+struct mib_node* const ifentry_nodes[22] = {
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root,
+  (struct mib_node* const)&iflist_root, (struct mib_node* const)&iflist_root
+};
+const struct mib_array_node ifentry = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  22,
+  ifentry_ids,
+  ifentry_nodes
+};
+
+s32_t iftable_id = 1;
+struct mib_node* iftable_node = (struct mib_node* const)&ifentry;
+struct mib_ram_array_node iftable = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_RA,
+  0,
+  &iftable_id,
+  &iftable_node
+};
+
+/* interfaces .1.3.6.1.2.1.2 */
+const mib_scalar_node interfaces_scalar = {
+  &interfaces_get_object_def,
+  &interfaces_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_SC,
+  0
+};
+const s32_t interfaces_ids[2] = { 1, 2 };
+struct mib_node* const interfaces_nodes[2] = {
+  (struct mib_node* const)&interfaces_scalar, (struct mib_node* const)&iftable
+};
+const struct mib_array_node interfaces = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  2,
+  interfaces_ids,
+  interfaces_nodes
+};
+
+
+/*             0 1 2 3 4 5 6 */
+/* system .1.3.6.1.2.1.1 */
+const mib_scalar_node sys_tem_scalar = {
+  &system_get_object_def,
+  &system_get_value,
+  &system_set_test,
+  &system_set_value,
+  MIB_NODE_SC,
+  0
+};
+const s32_t sys_tem_ids[7] = { 1, 2, 3, 4, 5, 6, 7 };
+struct mib_node* const sys_tem_nodes[7] = {
+  (struct mib_node* const)&sys_tem_scalar, (struct mib_node* const)&sys_tem_scalar,
+  (struct mib_node* const)&sys_tem_scalar, (struct mib_node* const)&sys_tem_scalar,
+  (struct mib_node* const)&sys_tem_scalar, (struct mib_node* const)&sys_tem_scalar,
+  (struct mib_node* const)&sys_tem_scalar
+};
+/* work around name issue with 'sys_tem', some compiler(s?) seem to reserve 'system' */
+const struct mib_array_node sys_tem = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  7,
+  sys_tem_ids,
+  sys_tem_nodes
+};
+
+/* mib-2 .1.3.6.1.2.1 */
+#if LWIP_TCP
+#define MIB2_GROUPS 8
+#else
+#define MIB2_GROUPS 7
+#endif
+const s32_t mib2_ids[MIB2_GROUPS] =
+{
+  1,
+  2,
+  3,
+  4,
+  5,
+#if LWIP_TCP
+  6,
+#endif
+  7,
+  11
+};
+struct mib_node* const mib2_nodes[MIB2_GROUPS] = {
+  (struct mib_node* const)&sys_tem,
+  (struct mib_node* const)&interfaces,
+  (struct mib_node* const)&at,
+  (struct mib_node* const)&mib2_ip,
+  (struct mib_node* const)&icmp,
+#if LWIP_TCP
+  (struct mib_node* const)&tcp,
+#endif
+  (struct mib_node* const)&udp,
+  (struct mib_node* const)&snmp
+};
+
+const struct mib_array_node mib2 = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  MIB2_GROUPS,
+  mib2_ids,
+  mib2_nodes
+};
+
+/* mgmt .1.3.6.1.2 */
+const s32_t mgmt_ids[1] = { 1 };
+struct mib_node* const mgmt_nodes[1] = { (struct mib_node* const)&mib2 };
+const struct mib_array_node mgmt = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  1,
+  mgmt_ids,
+  mgmt_nodes
+};
+
+/* internet .1.3.6.1 */
+#if SNMP_PRIVATE_MIB
+s32_t internet_ids[2] = { 2, 4 };
+struct mib_node* const internet_nodes[2] = { (struct mib_node* const)&mgmt, (struct mib_node* const)&private };
+const struct mib_array_node internet = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  2,
+  internet_ids,
+  internet_nodes
+};
+#else
+const s32_t internet_ids[1] = { 2 };
+struct mib_node* const internet_nodes[1] = { (struct mib_node* const)&mgmt };
+const struct mib_array_node internet = {
+  &noleafs_get_object_def,
+  &noleafs_get_value,
+  &noleafs_set_test,
+  &noleafs_set_value,
+  MIB_NODE_AR,
+  1,
+  internet_ids,
+  internet_nodes
+};
+#endif
+
+/** mib-2.system.sysObjectID  */
+static struct snmp_obj_id sysobjid = {SNMP_SYSOBJID_LEN, SNMP_SYSOBJID};
+/** enterprise ID for generic TRAPs, .iso.org.dod.internet.mgmt.mib-2.snmp */
+static struct snmp_obj_id snmpgrp_id = {7,{1,3,6,1,2,1,11}};
+/** mib-2.system.sysServices */
+static const s32_t sysservices = SNMP_SYSSERVICES;
+
+/** mib-2.system.sysDescr */
+static const u8_t sysdescr_len_default = 4;
+static const u8_t sysdescr_default[] = "lwIP";
+static u8_t* sysdescr_len_ptr = (u8_t*)&sysdescr_len_default;
+static u8_t* sysdescr_ptr = (u8_t*)&sysdescr_default[0];
+/** mib-2.system.sysContact */
+static const u8_t syscontact_len_default = 0;
+static const u8_t syscontact_default[] = "";
+static u8_t* syscontact_len_ptr = (u8_t*)&syscontact_len_default;
+static u8_t* syscontact_ptr = (u8_t*)&syscontact_default[0];
+/** mib-2.system.sysName */
+static const u8_t sysname_len_default = 8;
+static const u8_t sysname_default[] = "FQDN-unk";
+static u8_t* sysname_len_ptr = (u8_t*)&sysname_len_default;
+static u8_t* sysname_ptr = (u8_t*)&sysname_default[0];
+/** mib-2.system.sysLocation */
+static const u8_t syslocation_len_default = 0;
+static const u8_t syslocation_default[] = "";
+static u8_t* syslocation_len_ptr = (u8_t*)&syslocation_len_default;
+static u8_t* syslocation_ptr = (u8_t*)&syslocation_default[0];
+/** mib-2.snmp.snmpEnableAuthenTraps */
+static const u8_t snmpenableauthentraps_default = 2; /* disabled */
+static u8_t* snmpenableauthentraps_ptr = (u8_t*)&snmpenableauthentraps_default;
+
+/** mib-2.interfaces.ifTable.ifEntry.ifSpecific (zeroDotZero) */
+static const struct snmp_obj_id ifspecific = {2, {0, 0}};
+/** mib-2.ip.ipRouteTable.ipRouteEntry.ipRouteInfo (zeroDotZero) */
+static const struct snmp_obj_id iprouteinfo = {2, {0, 0}};
+
+
+
+/* mib-2.system counter(s) */
+static u32_t sysuptime = 0;
+
+/* mib-2.ip counter(s) */
+static u32_t ipinreceives = 0,
+             ipinhdrerrors = 0,
+             ipinaddrerrors = 0,
+             ipforwdatagrams = 0,
+             ipinunknownprotos = 0,
+             ipindiscards = 0,
+             ipindelivers = 0,
+             ipoutrequests = 0,
+             ipoutdiscards = 0,
+             ipoutnoroutes = 0,
+             ipreasmreqds = 0,
+             ipreasmoks = 0,
+             ipreasmfails = 0,
+             ipfragoks = 0,
+             ipfragfails = 0,
+             ipfragcreates = 0,
+             iproutingdiscards = 0;
+/* mib-2.icmp counter(s) */
+static u32_t icmpinmsgs = 0,
+             icmpinerrors = 0,
+             icmpindestunreachs = 0,
+             icmpintimeexcds = 0,
+             icmpinparmprobs = 0,
+             icmpinsrcquenchs = 0,
+             icmpinredirects = 0,
+             icmpinechos = 0,
+             icmpinechoreps = 0,
+             icmpintimestamps = 0,
+             icmpintimestampreps = 0,
+             icmpinaddrmasks = 0,
+             icmpinaddrmaskreps = 0,
+             icmpoutmsgs = 0,
+             icmpouterrors = 0,
+             icmpoutdestunreachs = 0,
+             icmpouttimeexcds = 0,
+             icmpoutparmprobs = 0,
+             icmpoutsrcquenchs = 0,
+             icmpoutredirects = 0,
+             icmpoutechos = 0,
+             icmpoutechoreps = 0,
+             icmpouttimestamps = 0,
+             icmpouttimestampreps = 0,
+             icmpoutaddrmasks = 0,
+             icmpoutaddrmaskreps = 0;
+/* mib-2.tcp counter(s) */
+static u32_t tcpactiveopens = 0,
+             tcppassiveopens = 0,
+             tcpattemptfails = 0,
+             tcpestabresets = 0,
+             tcpinsegs = 0,
+             tcpoutsegs = 0,
+             tcpretranssegs = 0,
+             tcpinerrs = 0,
+             tcpoutrsts = 0;
+/* mib-2.udp counter(s) */
+static u32_t udpindatagrams = 0,
+             udpnoports = 0,
+             udpinerrors = 0,
+             udpoutdatagrams = 0;
+/* mib-2.snmp counter(s) */
+static u32_t snmpinpkts = 0,
+             snmpoutpkts = 0,
+             snmpinbadversions = 0,
+             snmpinbadcommunitynames = 0,
+             snmpinbadcommunityuses = 0,
+             snmpinasnparseerrs = 0,
+             snmpintoobigs = 0,
+             snmpinnosuchnames = 0,
+             snmpinbadvalues = 0,
+             snmpinreadonlys = 0,
+             snmpingenerrs = 0,
+             snmpintotalreqvars = 0,
+             snmpintotalsetvars = 0,
+             snmpingetrequests = 0,
+             snmpingetnexts = 0,
+             snmpinsetrequests = 0,
+             snmpingetresponses = 0,
+             snmpintraps = 0,
+             snmpouttoobigs = 0,
+             snmpoutnosuchnames = 0,
+             snmpoutbadvalues = 0,
+             snmpoutgenerrs = 0,
+             snmpoutgetrequests = 0,
+             snmpoutgetnexts = 0,
+             snmpoutsetrequests = 0,
+             snmpoutgetresponses = 0,
+             snmpouttraps = 0;
+
+
+
+/* prototypes of the following functions are in lwip/src/include/lwip/snmp.h */
+/**
+ * Copy octet string.
+ *
+ * @param dst points to destination
+ * @param src points to source
+ * @param n number of octets to copy.
+ */
+void ocstrncpy(u8_t *dst, u8_t *src, u8_t n)
+{
+  while (n > 0)
+  {
+    n--;
+    *dst++ = *src++;
+  }
+}
+
+/**
+ * Copy object identifier (s32_t) array.
+ *
+ * @param dst points to destination
+ * @param src points to source
+ * @param n number of sub identifiers to copy.
+ */
+void objectidncpy(s32_t *dst, s32_t *src, u8_t n)
+{
+  while(n > 0)
+  {
+    n--;
+    *dst++ = *src++;
+  }
+}
+
+/**
+ * Initializes sysDescr pointers.
+ *
+ * @param str if non-NULL then copy str pointer
+ * @param len points to string length, excluding zero terminator
+ */
+void snmp_set_sysdesr(u8_t *str, u8_t *len)
+{
+  if (str != NULL)
+  {
+    sysdescr_ptr = str;
+    sysdescr_len_ptr = len;
+  }
+}
+
+void snmp_get_sysobjid_ptr(struct snmp_obj_id **oid)
+{
+  *oid = &sysobjid;
+}
+
+/**
+ * Initializes sysObjectID value.
+ *
+ * @param oid points to stuct snmp_obj_id to copy
+ */
+void snmp_set_sysobjid(struct snmp_obj_id *oid)
+{
+  sysobjid = *oid;
+}
+
+/**
+ * Must be called at regular 10 msec interval from a timer interrupt
+ * or signal handler depending on your runtime environment.
+ */
+void snmp_inc_sysuptime(void)
+{
+  sysuptime++;
+}
+
+void snmp_add_sysuptime(u32_t value)
+{
+  sysuptime+=value;
+}
+
+void snmp_get_sysuptime(u32_t *value)
+{
+  SNMP_GET_SYSUPTIME(sysuptime);
+  *value = sysuptime;
+}
+
+/**
+ * Initializes sysContact pointers,
+ * e.g. ptrs to non-volatile memory external to lwIP.
+ *
+ * @param ocstr if non-NULL then copy str pointer
+ * @param ocstrlen points to string length, excluding zero terminator
+ */
+void snmp_set_syscontact(u8_t *ocstr, u8_t *ocstrlen)
+{
+  if (ocstr != NULL)
+  {
+    syscontact_ptr = ocstr;
+    syscontact_len_ptr = ocstrlen;
+  }
+}
+
+/**
+ * Initializes sysName pointers,
+ * e.g. ptrs to non-volatile memory external to lwIP.
+ *
+ * @param ocstr if non-NULL then copy str pointer
+ * @param ocstrlen points to string length, excluding zero terminator
+ */
+void snmp_set_sysname(u8_t *ocstr, u8_t *ocstrlen)
+{
+  if (ocstr != NULL)
+  {
+    sysname_ptr = ocstr;
+    sysname_len_ptr = ocstrlen;
+  }
+}
+
+/**
+ * Initializes sysLocation pointers,
+ * e.g. ptrs to non-volatile memory external to lwIP.
+ *
+ * @param ocstr if non-NULL then copy str pointer
+ * @param ocstrlen points to string length, excluding zero terminator
+ */
+void snmp_set_syslocation(u8_t *ocstr, u8_t *ocstrlen)
+{
+  if (ocstr != NULL)
+  {
+    syslocation_ptr = ocstr;
+    syslocation_len_ptr = ocstrlen;
+  }
+}
+
+
+void snmp_add_ifinoctets(struct netif *ni, u32_t value)
+{
+  ni->ifinoctets += value;
+}
+
+void snmp_inc_ifinucastpkts(struct netif *ni)
+{
+  (ni->ifinucastpkts)++;
+}
+
+void snmp_inc_ifinnucastpkts(struct netif *ni)
+{
+  (ni->ifinnucastpkts)++;
+}
+
+void snmp_inc_ifindiscards(struct netif *ni)
+{
+  (ni->ifindiscards)++;
+}
+
+void snmp_add_ifoutoctets(struct netif *ni, u32_t value)
+{
+  ni->ifoutoctets += value;
+}
+
+void snmp_inc_ifoutucastpkts(struct netif *ni)
+{
+  (ni->ifoutucastpkts)++;
+}
+
+void snmp_inc_ifoutnucastpkts(struct netif *ni)
+{
+  (ni->ifoutnucastpkts)++;
+}
+
+void snmp_inc_ifoutdiscards(struct netif *ni)
+{
+  (ni->ifoutdiscards)++;
+}
+
+void snmp_inc_iflist(void)
+{
+  struct mib_list_node *if_node = NULL;
+
+  snmp_mib_node_insert(&iflist_root, iflist_root.count + 1, &if_node);
+  /* enable getnext traversal on filled table */
+  iftable.maxlength = 1;
+}
+
+void snmp_dec_iflist(void)
+{
+  snmp_mib_node_delete(&iflist_root, iflist_root.tail);
+  /* disable getnext traversal on empty table */
+  if(iflist_root.count == 0) iftable.maxlength = 0;
+}
+
+/**
+ * Inserts ARP table indexes (.xIfIndex.xNetAddress)
+ * into arp table index trees (both atTable and ipNetToMediaTable).
+ */
+void snmp_insert_arpidx_tree(struct netif *ni, struct ip_addr *ip)
+{
+  struct mib_list_rootnode *at_rn;
+  struct mib_list_node *at_node;
+  struct ip_addr hip;
+  s32_t arpidx[5];
+  u8_t level, tree;
+
+  LWIP_ASSERT("ni != NULL", ni != NULL);
+  snmp_netiftoifindex(ni, &arpidx[0]);
+  hip.addr = ntohl(ip->addr);
+  snmp_iptooid(&hip, &arpidx[1]);
+
+  for (tree = 0; tree < 2; tree++)
+  {
+    if (tree == 0)
+    {
+      at_rn = &arptree_root;
+    }
+    else
+    {
+      at_rn = &ipntomtree_root;
+    }
+    for (level = 0; level < 5; level++)
+    {
+      at_node = NULL;
+      snmp_mib_node_insert(at_rn, arpidx[level], &at_node);
+      if ((level != 4) && (at_node != NULL))
+      {
+        if (at_node->nptr == NULL)
+        {
+          at_rn = snmp_mib_lrn_alloc();
+          at_node->nptr = (struct mib_node*)at_rn;
+          if (at_rn != NULL)
+          {
+            if (level == 3)
+            {
+              if (tree == 0)
+              {
+                at_rn->get_object_def = atentry_get_object_def;
+                at_rn->get_value = atentry_get_value;
+              }
+              else
+              {
+                at_rn->get_object_def = ip_ntomentry_get_object_def;
+                at_rn->get_value = ip_ntomentry_get_value;
+              }
+              at_rn->set_test = noleafs_set_test;
+              at_rn->set_value = noleafs_set_value;
+            }
+          }
+          else
+          {
+            /* at_rn == NULL, malloc failure */
+            LWIP_DEBUGF(SNMP_MIB_DEBUG,("snmp_insert_arpidx_tree() insert failed, mem full"));
+            break;
+          }
+        }
+        else
+        {
+          at_rn = (struct mib_list_rootnode*)at_node->nptr;
+        }
+      }
+    }
+  }
+  /* enable getnext traversal on filled tables */
+  at.maxlength = 1;
+  ipntomtable.maxlength = 1;
+}
+
+/**
+ * Removes ARP table indexes (.xIfIndex.xNetAddress)
+ * from arp table index trees.
+ */
+void snmp_delete_arpidx_tree(struct netif *ni, struct ip_addr *ip)
+{
+  struct mib_list_rootnode *at_rn, *next, *del_rn[5];
+  struct mib_list_node *at_n, *del_n[5];
+  struct ip_addr hip;
+  s32_t arpidx[5];
+  u8_t fc, tree, level, del_cnt;
+
+  snmp_netiftoifindex(ni, &arpidx[0]);
+  hip.addr = ntohl(ip->addr);
+  snmp_iptooid(&hip, &arpidx[1]);
+
+  for (tree = 0; tree < 2; tree++)
+  {
+    /* mark nodes for deletion */
+    if (tree == 0)
+    {
+      at_rn = &arptree_root;
+    }
+    else
+    {
+      at_rn = &ipntomtree_root;
+    }
+    level = 0;
+    del_cnt = 0;
+    while ((level < 5) && (at_rn != NULL))
+    {
+      fc = snmp_mib_node_find(at_rn, arpidx[level], &at_n);
+      if (fc == 0)
+      {
+        /* arpidx[level] does not exist */
+        del_cnt = 0;
+        at_rn = NULL;
+      }
+      else if (fc == 1)
+      {
+        del_rn[del_cnt] = at_rn;
+        del_n[del_cnt] = at_n;
+        del_cnt++;
+        at_rn = (struct mib_list_rootnode*)(at_n->nptr);
+      }
+      else if (fc == 2)
+      {
+        /* reset delete (2 or more childs) */
+        del_cnt = 0;
+        at_rn = (struct mib_list_rootnode*)(at_n->nptr);
+      }
+      level++;
+    }
+    /* delete marked index nodes */
+    while (del_cnt > 0)
+    {
+      del_cnt--;
+
+      at_rn = del_rn[del_cnt];
+      at_n = del_n[del_cnt];
+
+      next = snmp_mib_node_delete(at_rn, at_n);
+      if (next != NULL)
+      {
+        LWIP_ASSERT("next_count == 0",next->count == 0);
+        snmp_mib_lrn_free(next);
+      }
+    }
+  }
+  /* disable getnext traversal on empty tables */
+  if(arptree_root.count == 0) at.maxlength = 0;
+  if(ipntomtree_root.count == 0) ipntomtable.maxlength = 0;
+}
+
+void snmp_inc_ipinreceives(void)
+{
+  ipinreceives++;
+}
+
+void snmp_inc_ipinhdrerrors(void)
+{
+  ipinhdrerrors++;
+}
+
+void snmp_inc_ipinaddrerrors(void)
+{
+  ipinaddrerrors++;
+}
+
+void snmp_inc_ipforwdatagrams(void)
+{
+  ipforwdatagrams++;
+}
+
+void snmp_inc_ipinunknownprotos(void)
+{
+  ipinunknownprotos++;
+}
+
+void snmp_inc_ipindiscards(void)
+{
+  ipindiscards++;
+}
+
+void snmp_inc_ipindelivers(void)
+{
+  ipindelivers++;
+}
+
+void snmp_inc_ipoutrequests(void)
+{
+  ipoutrequests++;
+}
+
+void snmp_inc_ipoutdiscards(void)
+{
+  ipoutdiscards++;
+}
+
+void snmp_inc_ipoutnoroutes(void)
+{
+  ipoutnoroutes++;
+}
+
+void snmp_inc_ipreasmreqds(void)
+{
+  ipreasmreqds++;
+}
+
+void snmp_inc_ipreasmoks(void)
+{
+  ipreasmoks++;
+}
+
+void snmp_inc_ipreasmfails(void)
+{
+  ipreasmfails++;
+}
+
+void snmp_inc_ipfragoks(void)
+{
+  ipfragoks++;
+}
+
+void snmp_inc_ipfragfails(void)
+{
+  ipfragfails++;
+}
+
+void snmp_inc_ipfragcreates(void)
+{
+  ipfragcreates++;
+}
+
+void snmp_inc_iproutingdiscards(void)
+{
+  iproutingdiscards++;
+}
+
+/**
+ * Inserts ipAddrTable indexes (.ipAdEntAddr)
+ * into index tree.
+ */
+void snmp_insert_ipaddridx_tree(struct netif *ni)
+{
+  struct mib_list_rootnode *ipa_rn;
+  struct mib_list_node *ipa_node;
+  struct ip_addr ip;
+  s32_t ipaddridx[4];
+  u8_t level;
+
+  LWIP_ASSERT("ni != NULL", ni != NULL);
+  ip.addr = ntohl(ni->ip_addr.addr);
+  snmp_iptooid(&ip, &ipaddridx[0]);
+
+  level = 0;
+  ipa_rn = &ipaddrtree_root;
+  while (level < 4)
+  {
+    ipa_node = NULL;
+    snmp_mib_node_insert(ipa_rn, ipaddridx[level], &ipa_node);
+    if ((level != 3) && (ipa_node != NULL))
+    {
+      if (ipa_node->nptr == NULL)
+      {
+        ipa_rn = snmp_mib_lrn_alloc();
+        ipa_node->nptr = (struct mib_node*)ipa_rn;
+        if (ipa_rn != NULL)
+        {
+          if (level == 2)
+          {
+            ipa_rn->get_object_def = ip_addrentry_get_object_def;
+            ipa_rn->get_value = ip_addrentry_get_value;
+            ipa_rn->set_test = noleafs_set_test;
+            ipa_rn->set_value = noleafs_set_value;
+          }
+        }
+        else
+        {
+          /* ipa_rn == NULL, malloc failure */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("snmp_insert_ipaddridx_tree() insert failed, mem full"));
+          break;
+        }
+      }
+      else
+      {
+        ipa_rn = (struct mib_list_rootnode*)ipa_node->nptr;
+      }
+    }
+    level++;
+  }
+  /* enable getnext traversal on filled table */
+  ipaddrtable.maxlength = 1;
+}
+
+/**
+ * Removes ipAddrTable indexes (.ipAdEntAddr)
+ * from index tree.
+ */
+void snmp_delete_ipaddridx_tree(struct netif *ni)
+{
+  struct mib_list_rootnode *ipa_rn, *next, *del_rn[4];
+  struct mib_list_node *ipa_n, *del_n[4];
+  struct ip_addr ip;
+  s32_t ipaddridx[4];
+  u8_t fc, level, del_cnt;
+
+  LWIP_ASSERT("ni != NULL", ni != NULL);
+  ip.addr = ntohl(ni->ip_addr.addr);
+  snmp_iptooid(&ip, &ipaddridx[0]);
+
+  /* mark nodes for deletion */
+  level = 0;
+  del_cnt = 0;
+  ipa_rn = &ipaddrtree_root;
+  while ((level < 4) && (ipa_rn != NULL))
+  {
+    fc = snmp_mib_node_find(ipa_rn, ipaddridx[level], &ipa_n);
+    if (fc == 0)
+    {
+      /* ipaddridx[level] does not exist */
+      del_cnt = 0;
+      ipa_rn = NULL;
+    }
+    else if (fc == 1)
+    {
+      del_rn[del_cnt] = ipa_rn;
+      del_n[del_cnt] = ipa_n;
+      del_cnt++;
+      ipa_rn = (struct mib_list_rootnode*)(ipa_n->nptr);
+    }
+    else if (fc == 2)
+    {
+      /* reset delete (2 or more childs) */
+      del_cnt = 0;
+      ipa_rn = (struct mib_list_rootnode*)(ipa_n->nptr);
+    }
+    level++;
+  }
+  /* delete marked index nodes */
+  while (del_cnt > 0)
+  {
+    del_cnt--;
+
+    ipa_rn = del_rn[del_cnt];
+    ipa_n = del_n[del_cnt];
+
+    next = snmp_mib_node_delete(ipa_rn, ipa_n);
+    if (next != NULL)
+    {
+      LWIP_ASSERT("next_count == 0",next->count == 0);
+      snmp_mib_lrn_free(next);
+    }
+  }
+  /* disable getnext traversal on empty table */
+  if (ipaddrtree_root.count == 0) ipaddrtable.maxlength = 0;
+}
+
+/**
+ * Inserts ipRouteTable indexes (.ipRouteDest)
+ * into index tree.
+ *
+ * @param dflt non-zero for the default rte, zero for network rte
+ * @param ni points to network interface for this rte
+ *
+ * @todo record sysuptime for _this_ route when it is installed
+ *   (needed for ipRouteAge) in the netif.
+ */
+void snmp_insert_iprteidx_tree(u8_t dflt, struct netif *ni)
+{
+  u8_t insert = 0;
+  struct ip_addr dst;
+
+  if (dflt != 0)
+  {
+    /* the default route 0.0.0.0 */
+    dst.addr = 0;
+    insert = 1;
+  }
+  else
+  {
+    /* route to the network address */
+    dst.addr = ntohl(ni->ip_addr.addr & ni->netmask.addr);
+    /* exclude 0.0.0.0 network (reserved for default rte) */
+    if (dst.addr != 0) insert = 1;
+  }
+  if (insert)
+  {
+    struct mib_list_rootnode *iprte_rn;
+    struct mib_list_node *iprte_node;
+    s32_t iprteidx[4];
+    u8_t level;
+
+    snmp_iptooid(&dst, &iprteidx[0]);
+    level = 0;
+    iprte_rn = &iprtetree_root;
+    while (level < 4)
+    {
+      iprte_node = NULL;
+      snmp_mib_node_insert(iprte_rn, iprteidx[level], &iprte_node);
+      if ((level != 3) && (iprte_node != NULL))
+      {
+        if (iprte_node->nptr == NULL)
+        {
+          iprte_rn = snmp_mib_lrn_alloc();
+          iprte_node->nptr = (struct mib_node*)iprte_rn;
+          if (iprte_rn != NULL)
+          {
+            if (level == 2)
+            {
+              iprte_rn->get_object_def = ip_rteentry_get_object_def;
+              iprte_rn->get_value = ip_rteentry_get_value;
+              iprte_rn->set_test = noleafs_set_test;
+              iprte_rn->set_value = noleafs_set_value;
+            }
+          }
+          else
+          {
+            /* iprte_rn == NULL, malloc failure */
+            LWIP_DEBUGF(SNMP_MIB_DEBUG,("snmp_insert_iprteidx_tree() insert failed, mem full"));
+            break;
+          }
+        }
+        else
+        {
+          iprte_rn = (struct mib_list_rootnode*)iprte_node->nptr;
+        }
+      }
+      level++;
+    }
+  }
+  /* enable getnext traversal on filled table */
+  iprtetable.maxlength = 1;
+}
+
+/**
+ * Removes ipRouteTable indexes (.ipRouteDest)
+ * from index tree.
+ *
+ * @param dflt non-zero for the default rte, zero for network rte
+ * @param ni points to network interface for this rte or NULL
+ *   for default route to be removed.
+ */
+void snmp_delete_iprteidx_tree(u8_t dflt, struct netif *ni)
+{
+  u8_t delete = 0;
+  struct ip_addr dst;
+
+  if (dflt != 0)
+  {
+    /* the default route 0.0.0.0 */
+    dst.addr = 0;
+    delete = 1;
+  }
+  else
+  {
+    /* route to the network address */
+    dst.addr = ntohl(ni->ip_addr.addr & ni->netmask.addr);
+    /* exclude 0.0.0.0 network (reserved for default rte) */
+    if (dst.addr != 0) delete = 1;
+  }
+  if (delete)
+  {
+    struct mib_list_rootnode *iprte_rn, *next, *del_rn[4];
+    struct mib_list_node *iprte_n, *del_n[4];
+    s32_t iprteidx[4];
+    u8_t fc, level, del_cnt;
+
+    snmp_iptooid(&dst, &iprteidx[0]);
+    /* mark nodes for deletion */
+    level = 0;
+    del_cnt = 0;
+    iprte_rn = &iprtetree_root;
+    while ((level < 4) && (iprte_rn != NULL))
+    {
+      fc = snmp_mib_node_find(iprte_rn, iprteidx[level], &iprte_n);
+      if (fc == 0)
+      {
+        /* iprteidx[level] does not exist */
+        del_cnt = 0;
+        iprte_rn = NULL;
+      }
+      else if (fc == 1)
+      {
+        del_rn[del_cnt] = iprte_rn;
+        del_n[del_cnt] = iprte_n;
+        del_cnt++;
+        iprte_rn = (struct mib_list_rootnode*)(iprte_n->nptr);
+      }
+      else if (fc == 2)
+      {
+        /* reset delete (2 or more childs) */
+        del_cnt = 0;
+        iprte_rn = (struct mib_list_rootnode*)(iprte_n->nptr);
+      }
+      level++;
+    }
+    /* delete marked index nodes */
+    while (del_cnt > 0)
+    {
+      del_cnt--;
+
+      iprte_rn = del_rn[del_cnt];
+      iprte_n = del_n[del_cnt];
+
+      next = snmp_mib_node_delete(iprte_rn, iprte_n);
+      if (next != NULL)
+      {
+        LWIP_ASSERT("next_count == 0",next->count == 0);
+        snmp_mib_lrn_free(next);
+      }
+    }
+  }
+  /* disable getnext traversal on empty table */
+  if (iprtetree_root.count == 0) iprtetable.maxlength = 0;
+}
+
+
+void snmp_inc_icmpinmsgs(void)
+{
+  icmpinmsgs++;
+}
+
+void snmp_inc_icmpinerrors(void)
+{
+  icmpinerrors++;
+}
+
+void snmp_inc_icmpindestunreachs(void)
+{
+  icmpindestunreachs++;
+}
+
+void snmp_inc_icmpintimeexcds(void)
+{
+  icmpintimeexcds++;
+}
+
+void snmp_inc_icmpinparmprobs(void)
+{
+  icmpinparmprobs++;
+}
+
+void snmp_inc_icmpinsrcquenchs(void)
+{
+  icmpinsrcquenchs++;
+}
+
+void snmp_inc_icmpinredirects(void)
+{
+  icmpinredirects++;
+}
+
+void snmp_inc_icmpinechos(void)
+{
+  icmpinechos++;
+}
+
+void snmp_inc_icmpinechoreps(void)
+{
+  icmpinechoreps++;
+}
+
+void snmp_inc_icmpintimestamps(void)
+{
+  icmpintimestamps++;
+}
+
+void snmp_inc_icmpintimestampreps(void)
+{
+  icmpintimestampreps++;
+}
+
+void snmp_inc_icmpinaddrmasks(void)
+{
+  icmpinaddrmasks++;
+}
+
+void snmp_inc_icmpinaddrmaskreps(void)
+{
+  icmpinaddrmaskreps++;
+}
+
+void snmp_inc_icmpoutmsgs(void)
+{
+  icmpoutmsgs++;
+}
+
+void snmp_inc_icmpouterrors(void)
+{
+  icmpouterrors++;
+}
+
+void snmp_inc_icmpoutdestunreachs(void)
+{
+  icmpoutdestunreachs++;
+}
+
+void snmp_inc_icmpouttimeexcds(void)
+{
+  icmpouttimeexcds++;
+}
+
+void snmp_inc_icmpoutparmprobs(void)
+{
+  icmpoutparmprobs++;
+}
+
+void snmp_inc_icmpoutsrcquenchs(void)
+{
+  icmpoutsrcquenchs++;
+}
+
+void snmp_inc_icmpoutredirects(void)
+{
+  icmpoutredirects++;
+}
+
+void snmp_inc_icmpoutechos(void)
+{
+  icmpoutechos++;
+}
+
+void snmp_inc_icmpoutechoreps(void)
+{
+  icmpoutechoreps++;
+}
+
+void snmp_inc_icmpouttimestamps(void)
+{
+  icmpouttimestamps++;
+}
+
+void snmp_inc_icmpouttimestampreps(void)
+{
+  icmpouttimestampreps++;
+}
+
+void snmp_inc_icmpoutaddrmasks(void)
+{
+  icmpoutaddrmasks++;
+}
+
+void snmp_inc_icmpoutaddrmaskreps(void)
+{
+  icmpoutaddrmaskreps++;
+}
+
+void snmp_inc_tcpactiveopens(void)
+{
+  tcpactiveopens++;
+}
+
+void snmp_inc_tcppassiveopens(void)
+{
+  tcppassiveopens++;
+}
+
+void snmp_inc_tcpattemptfails(void)
+{
+  tcpattemptfails++;
+}
+
+void snmp_inc_tcpestabresets(void)
+{
+  tcpestabresets++;
+}
+
+void snmp_inc_tcpinsegs(void)
+{
+  tcpinsegs++;
+}
+
+void snmp_inc_tcpoutsegs(void)
+{
+  tcpoutsegs++;
+}
+
+void snmp_inc_tcpretranssegs(void)
+{
+  tcpretranssegs++;
+}
+
+void snmp_inc_tcpinerrs(void)
+{
+  tcpinerrs++;
+}
+
+void snmp_inc_tcpoutrsts(void)
+{
+  tcpoutrsts++;
+}
+
+void snmp_inc_udpindatagrams(void)
+{
+  udpindatagrams++;
+}
+
+void snmp_inc_udpnoports(void)
+{
+  udpnoports++;
+}
+
+void snmp_inc_udpinerrors(void)
+{
+  udpinerrors++;
+}
+
+void snmp_inc_udpoutdatagrams(void)
+{
+  udpoutdatagrams++;
+}
+
+/**
+ * Inserts udpTable indexes (.udpLocalAddress.udpLocalPort)
+ * into index tree.
+ */
+void snmp_insert_udpidx_tree(struct udp_pcb *pcb)
+{
+  struct mib_list_rootnode *udp_rn;
+  struct mib_list_node *udp_node;
+  struct ip_addr ip;
+  s32_t udpidx[5];
+  u8_t level;
+
+  LWIP_ASSERT("pcb != NULL", pcb != NULL);
+  ip.addr = ntohl(pcb->local_ip.addr);
+  snmp_iptooid(&ip, &udpidx[0]);
+  udpidx[4] = pcb->local_port;
+
+  udp_rn = &udp_root;
+  for (level = 0; level < 5; level++)
+  {
+    udp_node = NULL;
+    snmp_mib_node_insert(udp_rn, udpidx[level], &udp_node);
+    if ((level != 4) && (udp_node != NULL))
+    {
+      if (udp_node->nptr == NULL)
+      {
+        udp_rn = snmp_mib_lrn_alloc();
+        udp_node->nptr = (struct mib_node*)udp_rn;
+        if (udp_rn != NULL)
+        {
+          if (level == 3)
+          {
+            udp_rn->get_object_def = udpentry_get_object_def;
+            udp_rn->get_value = udpentry_get_value;
+            udp_rn->set_test = noleafs_set_test;
+            udp_rn->set_value = noleafs_set_value;
+          }
+        }
+        else
+        {
+          /* udp_rn == NULL, malloc failure */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("snmp_insert_udpidx_tree() insert failed, mem full"));
+          break;
+        }
+      }
+      else
+      {
+        udp_rn = (struct mib_list_rootnode*)udp_node->nptr;
+      }
+    }
+  }
+  udptable.maxlength = 1;
+}
+
+/**
+ * Removes udpTable indexes (.udpLocalAddress.udpLocalPort)
+ * from index tree.
+ */
+void snmp_delete_udpidx_tree(struct udp_pcb *pcb)
+{
+  struct mib_list_rootnode *udp_rn, *next, *del_rn[5];
+  struct mib_list_node *udp_n, *del_n[5];
+  struct ip_addr ip;
+  s32_t udpidx[5];
+  u8_t bindings, fc, level, del_cnt;
+
+  LWIP_ASSERT("pcb != NULL", pcb != NULL);
+  ip.addr = ntohl(pcb->local_ip.addr);
+  snmp_iptooid(&ip, &udpidx[0]);
+  udpidx[4] = pcb->local_port;
+
+  /* count PCBs for a given binding
+     (e.g. when reusing ports or for temp output PCBs) */
+  bindings = 0;
+  pcb = udp_pcbs;
+  while ((pcb != NULL))
+  {
+    if ((pcb->local_ip.addr == ip.addr) &&
+        (pcb->local_port == udpidx[4]))
+    {
+      bindings++;
+    }
+    pcb = pcb->next;
+  }
+  if (bindings == 1)
+  {
+    /* selectively remove */
+    /* mark nodes for deletion */
+    level = 0;
+    del_cnt = 0;
+    udp_rn = &udp_root;
+    while ((level < 5) && (udp_rn != NULL))
+    {
+      fc = snmp_mib_node_find(udp_rn, udpidx[level], &udp_n);
+      if (fc == 0)
+      {
+        /* udpidx[level] does not exist */
+        del_cnt = 0;
+        udp_rn = NULL;
+      }
+      else if (fc == 1)
+      {
+        del_rn[del_cnt] = udp_rn;
+        del_n[del_cnt] = udp_n;
+        del_cnt++;
+        udp_rn = (struct mib_list_rootnode*)(udp_n->nptr);
+      }
+      else if (fc == 2)
+      {
+        /* reset delete (2 or more childs) */
+        del_cnt = 0;
+        udp_rn = (struct mib_list_rootnode*)(udp_n->nptr);
+      }
+      level++;
+    }
+    /* delete marked index nodes */
+    while (del_cnt > 0)
+    {
+      del_cnt--;
+
+      udp_rn = del_rn[del_cnt];
+      udp_n = del_n[del_cnt];
+
+      next = snmp_mib_node_delete(udp_rn, udp_n);
+      if (next != NULL)
+      {
+        LWIP_ASSERT("next_count == 0",next->count == 0);
+        snmp_mib_lrn_free(next);
+      }
+    }
+  }
+  /* disable getnext traversal on empty table */
+  if (udp_root.count == 0) udptable.maxlength = 0;
+}
+
+
+void snmp_inc_snmpinpkts(void)
+{
+  snmpinpkts++;
+}
+
+void snmp_inc_snmpoutpkts(void)
+{
+  snmpoutpkts++;
+}
+
+void snmp_inc_snmpinbadversions(void)
+{
+  snmpinbadversions++;
+}
+
+void snmp_inc_snmpinbadcommunitynames(void)
+{
+  snmpinbadcommunitynames++;
+}
+
+void snmp_inc_snmpinbadcommunityuses(void)
+{
+  snmpinbadcommunityuses++;
+}
+
+void snmp_inc_snmpinasnparseerrs(void)
+{
+  snmpinasnparseerrs++;
+}
+
+void snmp_inc_snmpintoobigs(void)
+{
+  snmpintoobigs++;
+}
+
+void snmp_inc_snmpinnosuchnames(void)
+{
+  snmpinnosuchnames++;
+}
+
+void snmp_inc_snmpinbadvalues(void)
+{
+  snmpinbadvalues++;
+}
+
+void snmp_inc_snmpinreadonlys(void)
+{
+  snmpinreadonlys++;
+}
+
+void snmp_inc_snmpingenerrs(void)
+{
+  snmpingenerrs++;
+}
+
+void snmp_add_snmpintotalreqvars(u8_t value)
+{
+  snmpintotalreqvars += value;
+}
+
+void snmp_add_snmpintotalsetvars(u8_t value)
+{
+  snmpintotalsetvars += value;
+}
+
+void snmp_inc_snmpingetrequests(void)
+{
+  snmpingetrequests++;
+}
+
+void snmp_inc_snmpingetnexts(void)
+{
+  snmpingetnexts++;
+}
+
+void snmp_inc_snmpinsetrequests(void)
+{
+  snmpinsetrequests++;
+}
+
+void snmp_inc_snmpingetresponses(void)
+{
+  snmpingetresponses++;
+}
+
+void snmp_inc_snmpintraps(void)
+{
+  snmpintraps++;
+}
+
+void snmp_inc_snmpouttoobigs(void)
+{
+  snmpouttoobigs++;
+}
+
+void snmp_inc_snmpoutnosuchnames(void)
+{
+  snmpoutnosuchnames++;
+}
+
+void snmp_inc_snmpoutbadvalues(void)
+{
+  snmpoutbadvalues++;
+}
+
+void snmp_inc_snmpoutgenerrs(void)
+{
+  snmpoutgenerrs++;
+}
+
+void snmp_inc_snmpoutgetrequests(void)
+{
+  snmpoutgetrequests++;
+}
+
+void snmp_inc_snmpoutgetnexts(void)
+{
+  snmpoutgetnexts++;
+}
+
+void snmp_inc_snmpoutsetrequests(void)
+{
+  snmpoutsetrequests++;
+}
+
+void snmp_inc_snmpoutgetresponses(void)
+{
+  snmpoutgetresponses++;
+}
+
+void snmp_inc_snmpouttraps(void)
+{
+  snmpouttraps++;
+}
+
+void snmp_get_snmpgrpid_ptr(struct snmp_obj_id **oid)
+{
+  *oid = &snmpgrp_id;
+}
+
+void snmp_set_snmpenableauthentraps(u8_t *value)
+{
+  if (value != NULL)
+  {
+    snmpenableauthentraps_ptr = value;
+  }
+}
+
+void snmp_get_snmpenableauthentraps(u8_t *value)
+{
+  *value = *snmpenableauthentraps_ptr;
+}
+
+void
+noleafs_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  if (ident_len){}
+  if (ident){}
+  od->instance = MIB_OBJECT_NONE;
+}
+
+void
+noleafs_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  if (od){}
+  if (len){}
+  if (value){}
+}
+
+u8_t
+noleafs_set_test(struct obj_def *od, u16_t len, void *value)
+{
+  if (od){}
+  if (len){}
+  if (value){}
+  /* can't set */
+  return 0;
+}
+
+void
+noleafs_set_value(struct obj_def *od, u16_t len, void *value)
+{
+  if (od){}
+  if (len){}
+  if (value){}
+}
+
+
+/**
+ * Returns systems object definitions.
+ *
+ * @param ident_len the address length (2)
+ * @param ident points to objectname.0 (object id trailer)
+ * @param od points to object definition.
+ */
+static void
+system_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  u8_t id;
+
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if (ident_len == 2)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("get_object_def system.%"U16_F".0\n",(u16_t)id));
+    switch (id)
+    {
+      case 1: /* sysDescr */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+        od->v_len = *sysdescr_len_ptr;
+        break;
+      case 2: /* sysObjectID */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID);
+        od->v_len = sysobjid.len * sizeof(s32_t);
+        break;
+      case 3: /* sysUpTime */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS);
+        od->v_len = sizeof(u32_t);
+        break;
+      case 4: /* sysContact */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+        od->v_len = *syscontact_len_ptr;
+        break;
+      case 5: /* sysName */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+        od->v_len = *sysname_len_ptr;
+        break;
+      case 6: /* sysLocation */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+        od->v_len = *syslocation_len_ptr;
+        break;
+      case 7: /* sysServices */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("system_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    };
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("system_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+/**
+ * Returns system object value.
+ *
+ * @param ident_len the address length (2)
+ * @param ident points to objectname.0 (object id trailer)
+ * @param len return value space (in bytes)
+ * @param value points to (varbind) space to copy value into.
+ */
+static void
+system_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id;
+
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 1: /* sysDescr */
+      ocstrncpy(value,sysdescr_ptr, len);
+      break;
+    case 2: /* sysObjectID */
+      objectidncpy((s32_t*)value, (s32_t*)sysobjid.id, (u8_t)(len / sizeof(s32_t)));
+      break;
+    case 3: /* sysUpTime */
+      {
+        snmp_get_sysuptime(value);
+      }
+      break;
+    case 4: /* sysContact */
+      ocstrncpy(value,syscontact_ptr,len);
+      break;
+    case 5: /* sysName */
+      ocstrncpy(value,sysname_ptr,len);
+      break;
+    case 6: /* sysLocation */
+      ocstrncpy(value,syslocation_ptr,len);
+      break;
+    case 7: /* sysServices */
+      {
+        s32_t *sint_ptr = value;
+        *sint_ptr = sysservices;
+      }
+      break;
+  };
+}
+
+static u8_t
+system_set_test(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id, set_ok;
+
+  if (value) {}
+  set_ok = 0;
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 4: /* sysContact */
+      if ((syscontact_ptr != syscontact_default) &&
+          (len <= 255))
+      {
+        set_ok = 1;
+      }
+      break;
+    case 5: /* sysName */
+      if ((sysname_ptr != sysname_default) &&
+          (len <= 255))
+      {
+        set_ok = 1;
+      }
+      break;
+    case 6: /* sysLocation */
+      if ((syslocation_ptr != syslocation_default) &&
+          (len <= 255))
+      {
+        set_ok = 1;
+      }
+      break;
+  };
+  return set_ok;
+}
+
+static void
+system_set_value(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id;
+
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 4: /* sysContact */
+      ocstrncpy(syscontact_ptr,value,len);
+      *syscontact_len_ptr = len;
+      break;
+    case 5: /* sysName */
+      ocstrncpy(sysname_ptr,value,len);
+      *sysname_len_ptr = len;
+      break;
+    case 6: /* sysLocation */
+      ocstrncpy(syslocation_ptr,value,len);
+      *syslocation_len_ptr = len;
+      break;
+  };
+}
+
+/**
+ * Returns interfaces.ifnumber object definition.
+ *
+ * @param ident_len the address length (2)
+ * @param ident points to objectname.index
+ * @param od points to object definition.
+ */
+static void
+interfaces_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if (ident_len == 2)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    od->instance = MIB_OBJECT_SCALAR;
+    od->access = MIB_OBJECT_READ_ONLY;
+    od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+    od->v_len = sizeof(s32_t);
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("interfaces_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+/**
+ * Returns interfaces.ifnumber object value.
+ *
+ * @param ident_len the address length (2)
+ * @param ident points to objectname.0 (object id trailer)
+ * @param len return value space (in bytes)
+ * @param value points to (varbind) space to copy value into.
+ */
+static void
+interfaces_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  if (len){}
+  if (od->id_inst_ptr[0] == 1)
+  {
+    s32_t *sint_ptr = value;
+    *sint_ptr = iflist_root.count;
+  }
+}
+
+/**
+ * Returns ifentry object definitions.
+ *
+ * @param ident_len the address length (2)
+ * @param ident points to objectname.index
+ * @param od points to object definition.
+ */
+static void
+ifentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  u8_t id;
+
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if (ident_len == 2)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("get_object_def ifentry.%"U16_F"\n",(u16_t)id));
+    switch (id)
+    {
+      case 1: /* ifIndex */
+      case 3: /* ifType */
+      case 4: /* ifMtu */
+      case 8: /* ifOperStatus */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 2: /* ifDescr */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+        /** @todo this should be some sort of sizeof(struct netif.name) */
+        od->v_len = 2;
+        break;
+      case 5: /* ifSpeed */
+      case 21: /* ifOutQLen */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE);
+        od->v_len = sizeof(u32_t);
+        break;
+      case 6: /* ifPhysAddress */
+        {
+          struct netif *netif;
+
+          snmp_ifindextonetif(ident[1], &netif);
+          od->instance = MIB_OBJECT_TAB;
+          od->access = MIB_OBJECT_READ_ONLY;
+          od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+          od->v_len = netif->hwaddr_len;
+        }
+        break;
+      case 7: /* ifAdminStatus */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 9: /* ifLastChange */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS);
+        od->v_len = sizeof(u32_t);
+        break;
+      case 10: /* ifInOctets */
+      case 11: /* ifInUcastPkts */
+      case 12: /* ifInNUcastPkts */
+      case 13: /* ifInDiscarts */
+      case 14: /* ifInErrors */
+      case 15: /* ifInUnkownProtos */
+      case 16: /* ifOutOctets */
+      case 17: /* ifOutUcastPkts */
+      case 18: /* ifOutNUcastPkts */
+      case 19: /* ifOutDiscarts */
+      case 20: /* ifOutErrors */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER);
+        od->v_len = sizeof(u32_t);
+        break;
+      case 22: /* ifSpecific */
+        /** @note returning zeroDotZero (0.0) no media specific MIB support */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID);
+        od->v_len = ifspecific.len * sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("ifentry_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    };
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("ifentry_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+/**
+ * Returns ifentry object value.
+ *
+ * @param ident_len the address length (2)
+ * @param ident points to objectname.0 (object id trailer)
+ * @param len return value space (in bytes)
+ * @param value points to (varbind) space to copy value into.
+ */
+static void
+ifentry_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  struct netif *netif;
+  u8_t id;
+
+  snmp_ifindextonetif(od->id_inst_ptr[1], &netif);
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 1: /* ifIndex */
+      {
+        s32_t *sint_ptr = value;
+        *sint_ptr = od->id_inst_ptr[1];
+      }
+      break;
+    case 2: /* ifDescr */
+      ocstrncpy(value,(u8_t*)netif->name,len);
+      break;
+    case 3: /* ifType */
+      {
+        s32_t *sint_ptr = value;
+        *sint_ptr = netif->link_type;
+      }
+      break;
+    case 4: /* ifMtu */
+      {
+        s32_t *sint_ptr = value;
+        *sint_ptr = netif->mtu;
+      }
+      break;
+    case 5: /* ifSpeed */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->link_speed;
+      }
+      break;
+    case 6: /* ifPhysAddress */
+      ocstrncpy(value,netif->hwaddr,len);
+      break;
+    case 7: /* ifAdminStatus */
+#if LWIP_NETIF_LINK_CALLBACK
+      {
+        s32_t *sint_ptr = value;
+        if (netif_is_up(netif))
+        {
+          if (netif_is_link_up(netif))
+          {
+            *sint_ptr = 1; /* up */
+          }
+          else
+          {
+            *sint_ptr = 7; /* lowerLayerDown */
+          }
+        }
+        else
+        {
+          *sint_ptr = 2; /* down */
+        }
+      }
+      break;
+#endif
+    case 8: /* ifOperStatus */
+      {
+        s32_t *sint_ptr = value;
+        if (netif_is_up(netif))
+        {
+          *sint_ptr = 1;
+        }
+        else
+        {
+          *sint_ptr = 2;
+        }
+      }
+      break;
+    case 9: /* ifLastChange */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ts;
+      }
+      break;
+    case 10: /* ifInOctets */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifinoctets;
+      }
+      break;
+    case 11: /* ifInUcastPkts */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifinucastpkts;
+      }
+      break;
+    case 12: /* ifInNUcastPkts */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifinnucastpkts;
+      }
+      break;
+    case 13: /* ifInDiscarts */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifindiscards;
+      }
+      break;
+    case 14: /* ifInErrors */
+    case 15: /* ifInUnkownProtos */
+      /** @todo add these counters! */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = 0;
+      }
+      break;
+    case 16: /* ifOutOctets */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifoutoctets;
+      }
+      break;
+    case 17: /* ifOutUcastPkts */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifoutucastpkts;
+      }
+      break;
+    case 18: /* ifOutNUcastPkts */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifoutnucastpkts;
+      }
+      break;
+    case 19: /* ifOutDiscarts */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = netif->ifoutdiscards;
+      }
+      break;
+    case 20: /* ifOutErrors */
+       /** @todo add this counter! */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = 0;
+      }
+      break;
+    case 21: /* ifOutQLen */
+      /** @todo figure out if this must be 0 (no queue) or 1? */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = 0;
+      }
+      break;
+    case 22: /* ifSpecific */
+      objectidncpy((s32_t*)value, (s32_t*)ifspecific.id, (u8_t)(len / sizeof(s32_t)));
+      break;
+  };
+}
+
+#if !SNMP_SAFE_REQUESTS
+static u8_t
+ifentry_set_test (struct obj_def *od, u16_t len, void *value)
+{
+  struct netif *netif;
+  u8_t id, set_ok;
+
+  set_ok = 0;
+  snmp_ifindextonetif(od->id_inst_ptr[1], &netif);
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 7: /* ifAdminStatus */
+      {
+        s32_t *sint_ptr = value;
+        if (*sint_ptr == 1 || *sint_ptr == 2)
+          set_ok = 1;
+      }
+      break;
+  }
+  return set_ok;
+}
+
+static void
+ifentry_set_value (struct obj_def *od, u16_t len, void *value)
+{
+  struct netif *netif;
+  u8_t id;
+
+  snmp_ifindextonetif(od->id_inst_ptr[1], &netif);
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 7: /* ifAdminStatus */
+      {
+        s32_t *sint_ptr = value;
+        if (*sint_ptr == 1)
+        {
+          netif_set_up(netif);
+        }
+        else if (*sint_ptr == 2)
+        {
+          netif_set_down(netif);
+         }
+      }
+      break;
+  }
+}
+#endif /* SNMP_SAFE_REQUESTS */
+
+/**
+ * Returns atentry object definitions.
+ *
+ * @param ident_len the address length (6)
+ * @param ident points to objectname.atifindex.atnetaddress
+ * @param od points to object definition.
+ */
+static void
+atentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (5) */
+  ident_len += 5;
+  ident -= 5;
+
+  if (ident_len == 6)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    switch (ident[0])
+    {
+      case 1: /* atIfIndex */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 2: /* atPhysAddress */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+        od->v_len = 6; /** @todo try to use netif::hwaddr_len */
+        break;
+      case 3: /* atNetAddress */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR);
+        od->v_len = 4;
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("atentry_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    }
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("atentry_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+atentry_get_value(struct obj_def *od, u16_t len, void *value)
+{
+#if LWIP_ARP
+  u8_t id;
+  struct eth_addr* ethaddr_ret;
+  struct ip_addr* ipaddr_ret;
+#endif /* LWIP_ARP */
+  struct ip_addr ip;
+  struct netif *netif;
+
+  if (len) {}
+
+  snmp_ifindextonetif(od->id_inst_ptr[1], &netif);
+  snmp_oidtoip(&od->id_inst_ptr[2], &ip);
+  ip.addr = htonl(ip.addr);
+
+#if LWIP_ARP /** @todo implement a netif_find_addr */
+  if (etharp_find_addr(netif, &ip, &ethaddr_ret, &ipaddr_ret) > -1)
+  {
+    id = od->id_inst_ptr[0];
+    switch (id)
+    {
+      case 1: /* atIfIndex */
+        {
+          s32_t *sint_ptr = value;
+          *sint_ptr = od->id_inst_ptr[1];
+        }
+        break;
+      case 2: /* atPhysAddress */
+        {
+          struct eth_addr *dst = value;
+
+          *dst = *ethaddr_ret;
+        }
+        break;
+      case 3: /* atNetAddress */
+        {
+          struct ip_addr *dst = value;
+
+          *dst = *ipaddr_ret;
+        }
+        break;
+    }
+  }
+#endif /* LWIP_ARP */
+}
+
+static void
+ip_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  u8_t id;
+
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if (ident_len == 2)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("get_object_def ip.%"U16_F".0\n",(u16_t)id));
+    switch (id)
+    {
+      case 1: /* ipForwarding */
+      case 2: /* ipDefaultTTL */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 3: /* ipInReceives */
+      case 4: /* ipInHdrErrors */
+      case 5: /* ipInAddrErrors */
+      case 6: /* ipForwDatagrams */
+      case 7: /* ipInUnknownProtos */
+      case 8: /* ipInDiscards */
+      case 9: /* ipInDelivers */
+      case 10: /* ipOutRequests */
+      case 11: /* ipOutDiscards */
+      case 12: /* ipOutNoRoutes */
+      case 14: /* ipReasmReqds */
+      case 15: /* ipReasmOKs */
+      case 16: /* ipReasmFails */
+      case 17: /* ipFragOKs */
+      case 18: /* ipFragFails */
+      case 19: /* ipFragCreates */
+      case 23: /* ipRoutingDiscards */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER);
+        od->v_len = sizeof(u32_t);
+        break;
+      case 13: /* ipReasmTimeout */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    };
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+ip_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id;
+
+  if (len) {}
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 1: /* ipForwarding */
+      {
+        s32_t *sint_ptr = value;
+#if IP_FORWARD
+        /* forwarding */
+        *sint_ptr = 1;
+#else
+        /* not-forwarding */
+        *sint_ptr = 2;
+#endif
+      }
+      break;
+    case 2: /* ipDefaultTTL */
+      {
+        s32_t *sint_ptr = value;
+        *sint_ptr = IP_DEFAULT_TTL;
+      }
+      break;
+    case 3: /* ipInReceives */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipinreceives;
+      }
+      break;
+    case 4: /* ipInHdrErrors */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipinhdrerrors;
+      }
+      break;
+    case 5: /* ipInAddrErrors */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipinaddrerrors;
+      }
+      break;
+    case 6: /* ipForwDatagrams */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipforwdatagrams;
+      }
+      break;
+    case 7: /* ipInUnknownProtos */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipinunknownprotos;
+      }
+      break;
+    case 8: /* ipInDiscards */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipindiscards;
+      }
+      break;
+    case 9: /* ipInDelivers */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipindelivers;
+      }
+      break;
+    case 10: /* ipOutRequests */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipoutrequests;
+      }
+      break;
+    case 11: /* ipOutDiscards */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipoutdiscards;
+      }
+      break;
+    case 12: /* ipOutNoRoutes */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipoutnoroutes;
+      }
+      break;
+    case 13: /* ipReasmTimeout */
+      {
+        s32_t *sint_ptr = value;
+#if IP_REASSEMBLY
+        *sint_ptr = IP_REASS_MAXAGE;
+#else
+        *sint_ptr = 0;
+#endif
+      }
+      break;
+    case 14: /* ipReasmReqds */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipreasmreqds;
+      }
+      break;
+    case 15: /* ipReasmOKs */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipreasmoks;
+      }
+      break;
+    case 16: /* ipReasmFails */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipreasmfails;
+      }
+      break;
+    case 17: /* ipFragOKs */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipfragoks;
+      }
+      break;
+    case 18: /* ipFragFails */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipfragfails;
+      }
+      break;
+    case 19: /* ipFragCreates */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = ipfragcreates;
+      }
+      break;
+    case 23: /* ipRoutingDiscards */
+      /** @todo can lwIP discard routes at all?? hardwire this to 0?? */
+      {
+        u32_t *uint_ptr = value;
+        *uint_ptr = iproutingdiscards;
+      }
+      break;
+  };
+}
+
+/**
+ * Test ip object value before setting.
+ *
+ * @param od is the object definition
+ * @param len return value space (in bytes)
+ * @param value points to (varbind) space to copy value from.
+ *
+ * @note we allow set if the value matches the hardwired value,
+ *   otherwise return badvalue.
+ */
+static u8_t
+ip_set_test(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id, set_ok;
+  s32_t *sint_ptr = value;
+
+  if (len) {}
+  set_ok = 0;
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 1: /* ipForwarding */
+#if IP_FORWARD
+      /* forwarding */
+      if (*sint_ptr == 1)
+#else
+      /* not-forwarding */
+      if (*sint_ptr == 2)
+#endif
+      {
+        set_ok = 1;
+      }
+      break;
+    case 2: /* ipDefaultTTL */
+      if (*sint_ptr == IP_DEFAULT_TTL)
+      {
+        set_ok = 1;
+      }
+      break;
+  };
+  return set_ok;
+}
+
+static void
+ip_addrentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (4) */
+  ident_len += 4;
+  ident -= 4;
+
+  if (ident_len == 5)
+  {
+    u8_t id;
+
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    switch (id)
+    {
+      case 1: /* ipAdEntAddr */
+      case 3: /* ipAdEntNetMask */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR);
+        od->v_len = 4;
+        break;
+      case 2: /* ipAdEntIfIndex */
+      case 4: /* ipAdEntBcastAddr */
+      case 5: /* ipAdEntReasmMaxSize */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_addrentry_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    }
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_addrentry_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+ip_addrentry_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id;
+  u16_t ifidx;
+  struct ip_addr ip;
+  struct netif *netif = netif_list;
+
+  if (len) {}
+  snmp_oidtoip(&od->id_inst_ptr[1], &ip);
+  ip.addr = htonl(ip.addr);
+  ifidx = 0;
+  while ((netif != NULL) && !ip_addr_cmp(&ip, &netif->ip_addr))
+  {
+    netif = netif->next;
+    ifidx++;
+  }
+
+  if (netif != NULL)
+  {
+    id = od->id_inst_ptr[0];
+    switch (id)
+    {
+      case 1: /* ipAdEntAddr */
+        {
+          struct ip_addr *dst = value;
+          *dst = netif->ip_addr;
+        }
+        break;
+      case 2: /* ipAdEntIfIndex */
+        {
+          s32_t *sint_ptr = value;
+          *sint_ptr = ifidx + 1;
+        }
+        break;
+      case 3: /* ipAdEntNetMask */
+        {
+          struct ip_addr *dst = value;
+          *dst = netif->netmask;
+        }
+        break;
+      case 4: /* ipAdEntBcastAddr */
+        {
+          s32_t *sint_ptr = value;
+
+          /* lwIP oddity, there's no broadcast
+            address in the netif we can rely on */
+          *sint_ptr = ip_addr_broadcast.addr & 1;
+        }
+        break;
+      case 5: /* ipAdEntReasmMaxSize */
+        {
+          s32_t *sint_ptr = value;
+#if IP_REASSEMBLY
+          /* @todo The theoretical maximum is IP_REASS_MAX_PBUFS * size of the pbufs,
+           * but only if receiving one fragmented packet at a time.
+           * The current solution is to calculate for 2 simultaneous packets...
+           */
+          *sint_ptr = (IP_HLEN + ((IP_REASS_MAX_PBUFS/2) *
+            (PBUF_POOL_BUFSIZE - PBUF_LINK_HLEN - IP_HLEN)));
+#else
+          /** @todo returning MTU would be a bad thing and
+             returning a wild guess like '576' isn't good either */
+          *sint_ptr = 0;
+#endif
+        }
+        break;
+    }
+  }
+}
+
+/**
+ * @note
+ * lwIP IP routing is currently using the network addresses in netif_list.
+ * if no suitable network IP is found in netif_list, the default_netif is used.
+ */
+static void
+ip_rteentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  u8_t id;
+
+  /* return to object name, adding index depth (4) */
+  ident_len += 4;
+  ident -= 4;
+
+  if (ident_len == 5)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    switch (id)
+    {
+      case 1: /* ipRouteDest */
+      case 7: /* ipRouteNextHop */
+      case 11: /* ipRouteMask */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR);
+        od->v_len = 4;
+        break;
+      case 2: /* ipRouteIfIndex */
+      case 3: /* ipRouteMetric1 */
+      case 4: /* ipRouteMetric2 */
+      case 5: /* ipRouteMetric3 */
+      case 6: /* ipRouteMetric4 */
+      case 8: /* ipRouteType */
+      case 10: /* ipRouteAge */
+      case 12: /* ipRouteMetric5 */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 9: /* ipRouteProto */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 13: /* ipRouteInfo */
+        /** @note returning zeroDotZero (0.0) no routing protocol specific MIB */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID);
+        od->v_len = iprouteinfo.len * sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_rteentry_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    }
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_rteentry_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+ip_rteentry_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  struct netif *netif;
+  struct ip_addr dest;
+  s32_t *ident;
+  u8_t id;
+
+  ident = od->id_inst_ptr;
+  snmp_oidtoip(&ident[1], &dest);
+  dest.addr = htonl(dest.addr);
+
+  if (dest.addr == 0)
+  {
+    /* ip_route() uses default netif for default route */
+    netif = netif_default;
+  }
+  else
+  {
+    /* not using ip_route(), need exact match! */
+    netif = netif_list;
+    while ((netif != NULL) &&
+            !ip_addr_netcmp(&dest, &(netif->ip_addr), &(netif->netmask)) )
+    {
+      netif = netif->next;
+    }
+  }
+  if (netif != NULL)
+  {
+    id = ident[0];
+    switch (id)
+    {
+      case 1: /* ipRouteDest */
+        {
+          struct ip_addr *dst = value;
+
+          if (dest.addr == 0)
+          {
+            /* default rte has 0.0.0.0 dest */
+            dst->addr = 0;
+          }
+          else
+          {
+            /* netifs have netaddress dest */
+            dst->addr = netif->ip_addr.addr & netif->netmask.addr;
+          }
+        }
+        break;
+      case 2: /* ipRouteIfIndex */
+        {
+          s32_t *sint_ptr = value;
+
+          snmp_netiftoifindex(netif, sint_ptr);
+        }
+        break;
+      case 3: /* ipRouteMetric1 */
+        {
+          s32_t *sint_ptr = value;
+
+          if (dest.addr == 0)
+          {
+            /* default rte has metric 1 */
+            *sint_ptr = 1;
+          }
+          else
+          {
+            /* other rtes have metric 0 */
+            *sint_ptr = 0;
+          }
+        }
+        break;
+      case 4: /* ipRouteMetric2 */
+      case 5: /* ipRouteMetric3 */
+      case 6: /* ipRouteMetric4 */
+      case 12: /* ipRouteMetric5 */
+        {
+          s32_t *sint_ptr = value;
+          /* not used */
+          *sint_ptr = -1;
+        }
+        break;
+      case 7: /* ipRouteNextHop */
+        {
+          struct ip_addr *dst = value;
+
+          if (dest.addr == 0)
+          {
+            /* default rte: gateway */
+            *dst = netif->gw;
+          }
+          else
+          {
+            /* other rtes: netif ip_addr  */
+            *dst = netif->ip_addr;
+          }
+        }
+        break;
+      case 8: /* ipRouteType */
+        {
+          s32_t *sint_ptr = value;
+
+          if (dest.addr == 0)
+          {
+            /* default rte is indirect */
+            *sint_ptr = 4;
+          }
+          else
+          {
+            /* other rtes are direct */
+            *sint_ptr = 3;
+          }
+        }
+        break;
+      case 9: /* ipRouteProto */
+        {
+          s32_t *sint_ptr = value;
+          /* locally defined routes */
+          *sint_ptr = 2;
+        }
+        break;
+      case 10: /* ipRouteAge */
+        {
+          s32_t *sint_ptr = value;
+          /** @todo (sysuptime - timestamp last change) / 100
+              @see snmp_insert_iprteidx_tree() */
+          *sint_ptr = 0;
+        }
+        break;
+      case 11: /* ipRouteMask */
+        {
+          struct ip_addr *dst = value;
+
+          if (dest.addr == 0)
+          {
+            /* default rte use 0.0.0.0 mask */
+            dst->addr = 0;
+          }
+          else
+          {
+            /* other rtes use netmask */
+            *dst = netif->netmask;
+          }
+        }
+        break;
+      case 13: /* ipRouteInfo */
+        objectidncpy((s32_t*)value, (s32_t*)iprouteinfo.id, (u8_t)(len / sizeof(s32_t)));
+        break;
+    }
+  }
+}
+
+static void
+ip_ntomentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (5) */
+  ident_len += 5;
+  ident -= 5;
+
+  if (ident_len == 6)
+  {
+    u8_t id;
+
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    switch (id)
+    {
+      case 1: /* ipNetToMediaIfIndex */
+      case 4: /* ipNetToMediaType */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 2: /* ipNetToMediaPhysAddress */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR);
+        od->v_len = 6; /** @todo try to use netif::hwaddr_len */
+        break;
+      case 3: /* ipNetToMediaNetAddress */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR);
+        od->v_len = 4;
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_ntomentry_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    }
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_ntomentry_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+ip_ntomentry_get_value(struct obj_def *od, u16_t len, void *value)
+{
+#if LWIP_ARP
+  u8_t id;
+  struct eth_addr* ethaddr_ret;
+  struct ip_addr* ipaddr_ret;
+#endif /* LWIP_ARP */
+  struct ip_addr ip;
+  struct netif *netif;
+
+  if (len) {}
+
+  snmp_ifindextonetif(od->id_inst_ptr[1], &netif);
+  snmp_oidtoip(&od->id_inst_ptr[2], &ip);
+  ip.addr = htonl(ip.addr);
+
+#if LWIP_ARP /** @todo implement a netif_find_addr */
+  if (etharp_find_addr(netif, &ip, &ethaddr_ret, &ipaddr_ret) > -1)
+  {
+    id = od->id_inst_ptr[0];
+    switch (id)
+    {
+      case 1: /* ipNetToMediaIfIndex */
+        {
+          s32_t *sint_ptr = value;
+          *sint_ptr = od->id_inst_ptr[1];
+        }
+        break;
+      case 2: /* ipNetToMediaPhysAddress */
+        {
+          struct eth_addr *dst = value;
+
+          *dst = *ethaddr_ret;
+        }
+        break;
+      case 3: /* ipNetToMediaNetAddress */
+        {
+          struct ip_addr *dst = value;
+
+          *dst = *ipaddr_ret;
+        }
+        break;
+      case 4: /* ipNetToMediaType */
+        {
+          s32_t *sint_ptr = value;
+          /* dynamic (?) */
+          *sint_ptr = 3;
+        }
+        break;
+    }
+  }
+#endif /* LWIP_ARP */
+}
+
+static void
+icmp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if ((ident_len == 2) &&
+      (ident[0] > 0) && (ident[0] < 27))
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    od->instance = MIB_OBJECT_SCALAR;
+    od->access = MIB_OBJECT_READ_ONLY;
+    od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER);
+    od->v_len = sizeof(u32_t);
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("icmp_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+icmp_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u32_t *uint_ptr = value;
+  u8_t id;
+
+  if (len){}
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 1: /* icmpInMsgs */
+      *uint_ptr = icmpinmsgs;
+      break;
+    case 2: /* icmpInErrors */
+      *uint_ptr = icmpinerrors;
+      break;
+    case 3: /* icmpInDestUnreachs */
+      *uint_ptr = icmpindestunreachs;
+      break;
+    case 4: /* icmpInTimeExcds */
+      *uint_ptr = icmpintimeexcds;
+      break;
+    case 5: /* icmpInParmProbs */
+      *uint_ptr = icmpinparmprobs;
+      break;
+    case 6: /* icmpInSrcQuenchs */
+      *uint_ptr = icmpinsrcquenchs;
+      break;
+    case 7: /* icmpInRedirects */
+      *uint_ptr = icmpinredirects;
+      break;
+    case 8: /* icmpInEchos */
+      *uint_ptr = icmpinechos;
+      break;
+    case 9: /* icmpInEchoReps */
+      *uint_ptr = icmpinechoreps;
+      break;
+    case 10: /* icmpInTimestamps */
+      *uint_ptr = icmpintimestamps;
+      break;
+    case 11: /* icmpInTimestampReps */
+      *uint_ptr = icmpintimestampreps;
+      break;
+    case 12: /* icmpInAddrMasks */
+      *uint_ptr = icmpinaddrmasks;
+      break;
+    case 13: /* icmpInAddrMaskReps */
+      *uint_ptr = icmpinaddrmaskreps;
+      break;
+    case 14: /* icmpOutMsgs */
+      *uint_ptr = icmpoutmsgs;
+      break;
+    case 15: /* icmpOutErrors */
+      *uint_ptr = icmpouterrors;
+      break;
+    case 16: /* icmpOutDestUnreachs */
+      *uint_ptr = icmpoutdestunreachs;
+      break;
+    case 17: /* icmpOutTimeExcds */
+      *uint_ptr = icmpouttimeexcds;
+      break;
+    case 18: /* icmpOutParmProbs */
+      *uint_ptr = icmpoutparmprobs;
+      break;
+    case 19: /* icmpOutSrcQuenchs */
+      *uint_ptr = icmpoutsrcquenchs;
+      break;
+    case 20: /* icmpOutRedirects */
+      *uint_ptr = icmpoutredirects;
+      break;
+    case 21: /* icmpOutEchos */
+      *uint_ptr = icmpoutechos;
+      break;
+    case 22: /* icmpOutEchoReps */
+      *uint_ptr = icmpoutechoreps;
+      break;
+    case 23: /* icmpOutTimestamps */
+      *uint_ptr = icmpouttimestamps;
+      break;
+    case 24: /* icmpOutTimestampReps */
+      *uint_ptr = icmpouttimestampreps;
+      break;
+    case 25: /* icmpOutAddrMasks */
+      *uint_ptr = icmpoutaddrmasks;
+      break;
+    case 26: /* icmpOutAddrMaskReps */
+      *uint_ptr = icmpoutaddrmaskreps;
+      break;
+  }
+}
+
+#if LWIP_TCP
+/** @todo tcp grp */
+static void
+tcp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  u8_t id;
+
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if (ident_len == 2)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("get_object_def tcp.%"U16_F".0\n",(u16_t)id));
+
+    switch (id)
+    {
+      case 1: /* tcpRtoAlgorithm */
+      case 2: /* tcpRtoMin */
+      case 3: /* tcpRtoMax */
+      case 4: /* tcpMaxConn */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 5: /* tcpActiveOpens */
+      case 6: /* tcpPassiveOpens */
+      case 7: /* tcpAttemptFails */
+      case 8: /* tcpEstabResets */
+      case 10: /* tcpInSegs */
+      case 11: /* tcpOutSegs */
+      case 12: /* tcpRetransSegs */
+      case 14: /* tcpInErrs */
+      case 15: /* tcpOutRsts */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER);
+        od->v_len = sizeof(u32_t);
+        break;
+      case 9: /* tcpCurrEstab */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE);
+        od->v_len = sizeof(u32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("tcp_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    };
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("tcp_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+tcp_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u32_t *uint_ptr = value;
+  s32_t *sint_ptr = value;
+  u8_t id;
+
+  if (len){}
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 1: /* tcpRtoAlgorithm, vanj(4) */
+      *sint_ptr = 4;
+      break;
+    case 2: /* tcpRtoMin */
+      /* @todo not the actual value, a guess,
+          needs to be calculated */
+      *sint_ptr = 1000;
+      break;
+    case 3: /* tcpRtoMax */
+      /* @todo not the actual value, a guess,
+         needs to be calculated */
+      *sint_ptr = 60000;
+      break;
+    case 4: /* tcpMaxConn */
+      *sint_ptr = MEMP_NUM_TCP_PCB;
+      break;
+    case 5: /* tcpActiveOpens */
+      *uint_ptr = tcpactiveopens;
+      break;
+    case 6: /* tcpPassiveOpens */
+      *uint_ptr = tcppassiveopens;
+      break;
+    case 7: /* tcpAttemptFails */
+      *uint_ptr = tcpattemptfails;
+      break;
+    case 8: /* tcpEstabResets */
+      *uint_ptr = tcpestabresets;
+      break;
+    case 9: /* tcpCurrEstab */
+      {
+        u16_t tcpcurrestab = 0;
+        struct tcp_pcb *pcb = tcp_active_pcbs;
+        while (pcb != NULL)
+        {
+          if ((pcb->state == ESTABLISHED) ||
+              (pcb->state == CLOSE_WAIT))
+          {
+            tcpcurrestab++;
+          }
+          pcb = pcb->next;
+        }
+        *uint_ptr = tcpcurrestab;
+      }
+      break;
+    case 10: /* tcpInSegs */
+      *uint_ptr = tcpinsegs;
+      break;
+    case 11: /* tcpOutSegs */
+      *uint_ptr = tcpoutsegs;
+      break;
+    case 12: /* tcpRetransSegs */
+      *uint_ptr = tcpretranssegs;
+      break;
+    case 14: /* tcpInErrs */
+      *uint_ptr = tcpinerrs;
+      break;
+    case 15: /* tcpOutRsts */
+      *uint_ptr = tcpoutrsts;
+      break;
+  }
+}
+#ifdef THIS_SEEMS_UNUSED
+static void
+tcpconnentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (10) */
+  ident_len += 10;
+  ident -= 10;
+
+  if (ident_len == 11)
+  {
+    u8_t id;
+
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("get_object_def tcp.%"U16_F".0\n",(u16_t)id));
+
+    switch (id)
+    {
+      case 1: /* tcpConnState */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      case 2: /* tcpConnLocalAddress */
+      case 4: /* tcpConnRemAddress */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR);
+        od->v_len = 4;
+        break;
+      case 3: /* tcpConnLocalPort */
+      case 5: /* tcpConnRemPort */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("tcpconnentry_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    };
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("tcpconnentry_get_object_def: no such object\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+tcpconnentry_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  struct ip_addr lip, rip;
+  u16_t lport, rport;
+  s32_t *ident;
+
+  ident = od->id_inst_ptr;
+  snmp_oidtoip(&ident[1], &lip);
+  lip.addr = htonl(lip.addr);
+  lport = ident[5];
+  snmp_oidtoip(&ident[6], &rip);
+  rip.addr = htonl(rip.addr);
+  rport = ident[10];
+
+  /** @todo find matching PCB */
+}
+#endif /* if 0 */
+#endif
+
+static void
+udp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if ((ident_len == 2) &&
+      (ident[0] > 0) && (ident[0] < 6))
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    od->instance = MIB_OBJECT_SCALAR;
+    od->access = MIB_OBJECT_READ_ONLY;
+    od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER);
+    od->v_len = sizeof(u32_t);
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("udp_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+udp_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u32_t *uint_ptr = value;
+  u8_t id;
+
+  if (len){}
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+    case 1: /* udpInDatagrams */
+      *uint_ptr = udpindatagrams;
+      break;
+    case 2: /* udpNoPorts */
+      *uint_ptr = udpnoports;
+      break;
+    case 3: /* udpInErrors */
+      *uint_ptr = udpinerrors;
+      break;
+    case 4: /* udpOutDatagrams */
+      *uint_ptr = udpoutdatagrams;
+      break;
+  }
+}
+
+static void
+udpentry_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (5) */
+  ident_len += 5;
+  ident -= 5;
+
+  if (ident_len == 6)
+  {
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    switch (ident[0])
+    {
+      case 1: /* udpLocalAddress */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR);
+        od->v_len = 4;
+        break;
+      case 2: /* udpLocalPort */
+        od->instance = MIB_OBJECT_TAB;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("udpentry_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    }
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("udpentry_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+udpentry_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id;
+  struct udp_pcb *pcb;
+  struct ip_addr ip;
+  u16_t port;
+
+  if (len){}
+  snmp_oidtoip(&od->id_inst_ptr[1], &ip);
+  ip.addr = htonl(ip.addr);
+  port = od->id_inst_ptr[5];
+
+  pcb = udp_pcbs;
+  while ((pcb != NULL) &&
+         !((pcb->local_ip.addr == ip.addr) &&
+           (pcb->local_port == port)))
+  {
+    pcb = pcb->next;
+  }
+
+  if (pcb != NULL)
+  {
+    id = od->id_inst_ptr[0];
+    switch (id)
+    {
+      case 1: /* udpLocalAddress */
+        {
+          struct ip_addr *dst = value;
+          *dst = pcb->local_ip;
+        }
+        break;
+      case 2: /* udpLocalPort */
+        {
+          s32_t *sint_ptr = value;
+          *sint_ptr = pcb->local_port;
+        }
+        break;
+    }
+  }
+}
+
+static void
+snmp_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od)
+{
+  /* return to object name, adding index depth (1) */
+  ident_len += 1;
+  ident -= 1;
+  if (ident_len == 2)
+  {
+    u8_t id;
+
+    od->id_inst_len = ident_len;
+    od->id_inst_ptr = ident;
+
+    id = ident[0];
+    switch (id)
+    {
+      case 1: /* snmpInPkts */
+      case 2: /* snmpOutPkts */
+      case 3: /* snmpInBadVersions */
+      case 4: /* snmpInBadCommunityNames */
+      case 5: /* snmpInBadCommunityUses */
+      case 6: /* snmpInASNParseErrs */
+      case 8: /* snmpInTooBigs */
+      case 9: /* snmpInNoSuchNames */
+      case 10: /* snmpInBadValues */
+      case 11: /* snmpInReadOnlys */
+      case 12: /* snmpInGenErrs */
+      case 13: /* snmpInTotalReqVars */
+      case 14: /* snmpInTotalSetVars */
+      case 15: /* snmpInGetRequests */
+      case 16: /* snmpInGetNexts */
+      case 17: /* snmpInSetRequests */
+      case 18: /* snmpInGetResponses */
+      case 19: /* snmpInTraps */
+      case 20: /* snmpOutTooBigs */
+      case 21: /* snmpOutNoSuchNames */
+      case 22: /* snmpOutBadValues */
+      case 24: /* snmpOutGenErrs */
+      case 25: /* snmpOutGetRequests */
+      case 26: /* snmpOutGetNexts */
+      case 27: /* snmpOutSetRequests */
+      case 28: /* snmpOutGetResponses */
+      case 29: /* snmpOutTraps */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_ONLY;
+        od->asn_type = (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER);
+        od->v_len = sizeof(u32_t);
+        break;
+      case 30: /* snmpEnableAuthenTraps */
+        od->instance = MIB_OBJECT_SCALAR;
+        od->access = MIB_OBJECT_READ_WRITE;
+        od->asn_type = (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG);
+        od->v_len = sizeof(s32_t);
+        break;
+      default:
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("snmp_get_object_def: no such object\n"));
+        od->instance = MIB_OBJECT_NONE;
+        break;
+    };
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("snmp_get_object_def: no scalar\n"));
+    od->instance = MIB_OBJECT_NONE;
+  }
+}
+
+static void
+snmp_get_value(struct obj_def *od, u16_t len, void *value)
+{
+  u32_t *uint_ptr = value;
+  u8_t id;
+
+  if (len){}
+  id = od->id_inst_ptr[0];
+  switch (id)
+  {
+      case 1: /* snmpInPkts */
+        *uint_ptr = snmpinpkts;
+        break;
+      case 2: /* snmpOutPkts */
+        *uint_ptr = snmpoutpkts;
+        break;
+      case 3: /* snmpInBadVersions */
+        *uint_ptr = snmpinbadversions;
+        break;
+      case 4: /* snmpInBadCommunityNames */
+        *uint_ptr = snmpinbadcommunitynames;
+        break;
+      case 5: /* snmpInBadCommunityUses */
+        *uint_ptr = snmpinbadcommunityuses;
+        break;
+      case 6: /* snmpInASNParseErrs */
+        *uint_ptr = snmpinasnparseerrs;
+        break;
+      case 8: /* snmpInTooBigs */
+        *uint_ptr = snmpintoobigs;
+        break;
+      case 9: /* snmpInNoSuchNames */
+        *uint_ptr = snmpinnosuchnames;
+        break;
+      case 10: /* snmpInBadValues */
+        *uint_ptr = snmpinbadvalues;
+        break;
+      case 11: /* snmpInReadOnlys */
+        *uint_ptr = snmpinreadonlys;
+        break;
+      case 12: /* snmpInGenErrs */
+        *uint_ptr = snmpingenerrs;
+        break;
+      case 13: /* snmpInTotalReqVars */
+        *uint_ptr = snmpintotalreqvars;
+        break;
+      case 14: /* snmpInTotalSetVars */
+        *uint_ptr = snmpintotalsetvars;
+        break;
+      case 15: /* snmpInGetRequests */
+        *uint_ptr = snmpingetrequests;
+        break;
+      case 16: /* snmpInGetNexts */
+        *uint_ptr = snmpingetnexts;
+        break;
+      case 17: /* snmpInSetRequests */
+        *uint_ptr = snmpinsetrequests;
+        break;
+      case 18: /* snmpInGetResponses */
+        *uint_ptr = snmpingetresponses;
+        break;
+      case 19: /* snmpInTraps */
+        *uint_ptr = snmpintraps;
+        break;
+      case 20: /* snmpOutTooBigs */
+        *uint_ptr = snmpouttoobigs;
+        break;
+      case 21: /* snmpOutNoSuchNames */
+        *uint_ptr = snmpoutnosuchnames;
+        break;
+      case 22: /* snmpOutBadValues */
+        *uint_ptr = snmpoutbadvalues;
+        break;
+      case 24: /* snmpOutGenErrs */
+        *uint_ptr = snmpoutgenerrs;
+        break;
+      case 25: /* snmpOutGetRequests */
+        *uint_ptr = snmpoutgetrequests;
+        break;
+      case 26: /* snmpOutGetNexts */
+        *uint_ptr = snmpoutgetnexts;
+        break;
+      case 27: /* snmpOutSetRequests */
+        *uint_ptr = snmpoutsetrequests;
+        break;
+      case 28: /* snmpOutGetResponses */
+        *uint_ptr = snmpoutgetresponses;
+        break;
+      case 29: /* snmpOutTraps */
+        *uint_ptr = snmpouttraps;
+        break;
+      case 30: /* snmpEnableAuthenTraps */
+        *uint_ptr = *snmpenableauthentraps_ptr;
+        break;
+  };
+}
+
+/**
+ * Test snmp object value before setting.
+ *
+ * @param od is the object definition
+ * @param len return value space (in bytes)
+ * @param value points to (varbind) space to copy value from.
+ */
+static u8_t
+snmp_set_test(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id, set_ok;
+
+  if (len) {}
+  set_ok = 0;
+  id = od->id_inst_ptr[0];
+  if (id == 30)
+  {
+    /* snmpEnableAuthenTraps */
+    s32_t *sint_ptr = value;
+
+    if (snmpenableauthentraps_ptr != &snmpenableauthentraps_default)
+    {
+      /* we should have writable non-volatile mem here */
+      if ((*sint_ptr == 1) || (*sint_ptr == 2))
+      {
+        set_ok = 1;
+      }
+    }
+    else
+    {
+      /* const or hardwired value */
+      if (*sint_ptr == snmpenableauthentraps_default)
+      {
+        set_ok = 1;
+      }
+    }
+  }
+  return set_ok;
+}
+
+static void
+snmp_set_value(struct obj_def *od, u16_t len, void *value)
+{
+  u8_t id;
+
+  if (len) {}
+  id = od->id_inst_ptr[0];
+  if (id == 30)
+  {
+    /* snmpEnableAuthenTraps */
+    s32_t *sint_ptr = value;
+    *snmpenableauthentraps_ptr = *sint_ptr;
+  }
+}
+
+#endif /* LWIP_SNMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/mib_structs.c b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/mib_structs.c
new file mode 100644
index 000000000..af8994ed2
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/mib_structs.c
@@ -0,0 +1,1183 @@
+/**
+ * @file
+ * MIB tree access/construction functions.
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/snmp_structs.h"
+#include "lwip/mem.h"
+
+/** .iso.org.dod.internet address prefix, @see snmp_iso_*() */
+const s32_t prefix[4] = {1, 3, 6, 1};
+
+#define NODE_STACK_SIZE (LWIP_SNMP_OBJ_ID_LEN)
+/** node stack entry (old news?) */
+struct nse
+{
+  /** right child */
+  struct mib_node* r_ptr;
+  /** right child identifier */
+  s32_t r_id;
+  /** right child next level */
+  u8_t r_nl;
+};
+static u8_t node_stack_cnt;
+static struct nse node_stack[NODE_STACK_SIZE];
+
+/**
+ * Pushes nse struct onto stack.
+ */
+static void
+push_node(struct nse* node)
+{
+  LWIP_ASSERT("node_stack_cnt < NODE_STACK_SIZE",node_stack_cnt < NODE_STACK_SIZE);
+  LWIP_DEBUGF(SNMP_MIB_DEBUG,("push_node() node=%p id=%"S32_F"\n",(void*)(node->r_ptr),node->r_id));
+  if (node_stack_cnt < NODE_STACK_SIZE)
+  {
+    node_stack[node_stack_cnt] = *node;
+    node_stack_cnt++;
+  }
+}
+
+/**
+ * Pops nse struct from stack.
+ */
+static void
+pop_node(struct nse* node)
+{
+  if (node_stack_cnt > 0)
+  {
+    node_stack_cnt--;
+    *node = node_stack[node_stack_cnt];
+  }
+  LWIP_DEBUGF(SNMP_MIB_DEBUG,("pop_node() node=%p id=%"S32_F"\n",(void *)(node->r_ptr),node->r_id));
+}
+
+/**
+ * Conversion from ifIndex to lwIP netif
+ * @param ifindex is a s32_t object sub-identifier
+ * @param netif points to returned netif struct pointer
+ */
+void
+snmp_ifindextonetif(s32_t ifindex, struct netif **netif)
+{
+  struct netif *nif = netif_list;
+  u16_t i, ifidx;
+
+  ifidx = ifindex - 1;
+  i = 0;
+  while ((nif != NULL) && (i < ifidx))
+  {
+    nif = nif->next;
+    i++;
+  }
+  *netif = nif;
+}
+
+/**
+ * Conversion from lwIP netif to ifIndex
+ * @param netif points to a netif struct
+ * @param ifidx points to s32_t object sub-identifier
+ */
+void
+snmp_netiftoifindex(struct netif *netif, s32_t *ifidx)
+{
+  struct netif *nif = netif_list;
+  u16_t i;
+
+  i = 0;
+  while (nif != netif)
+  {
+    nif = nif->next;
+    i++;
+  }
+  *ifidx = i+1;
+}
+
+/**
+ * Conversion from oid to lwIP ip_addr
+ * @param ident points to s32_t ident[4] input
+ * @param ip points to output struct
+ */
+void
+snmp_oidtoip(s32_t *ident, struct ip_addr *ip)
+{
+  u32_t ipa;
+
+  ipa = ident[0];
+  ipa <<= 8;
+  ipa |= ident[1];
+  ipa <<= 8;
+  ipa |= ident[2];
+  ipa <<= 8;
+  ipa |= ident[3];
+  ip->addr = ipa;
+}
+
+/**
+ * Conversion from lwIP ip_addr to oid
+ * @param ip points to input struct
+ * @param ident points to s32_t ident[4] output
+ */
+void
+snmp_iptooid(struct ip_addr *ip, s32_t *ident)
+{
+  u32_t ipa;
+
+  ipa = ip->addr;
+  ident[0] = (ipa >> 24) & 0xff;
+  ident[1] = (ipa >> 16) & 0xff;
+  ident[2] = (ipa >> 8) & 0xff;
+  ident[3] = ipa & 0xff;
+}
+
+struct mib_list_node *
+snmp_mib_ln_alloc(s32_t id)
+{
+  struct mib_list_node *ln;
+
+  ln = (struct mib_list_node *)mem_malloc(sizeof(struct mib_list_node));
+  if (ln != NULL)
+  {
+    ln->prev = NULL;
+    ln->next = NULL;
+    ln->objid = id;
+    ln->nptr = NULL;
+  }
+  return ln;
+}
+
+void
+snmp_mib_ln_free(struct mib_list_node *ln)
+{
+  mem_free(ln);
+}
+
+struct mib_list_rootnode *
+snmp_mib_lrn_alloc(void)
+{
+  struct mib_list_rootnode *lrn;
+
+  lrn = (struct mib_list_rootnode*)mem_malloc(sizeof(struct mib_list_rootnode));
+  if (lrn != NULL)
+  {
+    lrn->get_object_def = noleafs_get_object_def;
+    lrn->get_value = noleafs_get_value;
+    lrn->set_test = noleafs_set_test;
+    lrn->set_value = noleafs_set_value;
+    lrn->node_type = MIB_NODE_LR;
+    lrn->maxlength = 0;
+    lrn->head = NULL;
+    lrn->tail = NULL;
+    lrn->count = 0;
+  }
+  return lrn;
+}
+
+void
+snmp_mib_lrn_free(struct mib_list_rootnode *lrn)
+{
+  mem_free(lrn);
+}
+
+/**
+ * Inserts node in idx list in a sorted
+ * (ascending order) fashion and
+ * allocates the node if needed.
+ *
+ * @param rn points to the root node
+ * @param objid is the object sub identifier
+ * @param insn points to a pointer to the inserted node
+ *   used for constructing the tree.
+ * @return -1 if failed, 1 if inserted, 2 if present.
+ */
+s8_t
+snmp_mib_node_insert(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **insn)
+{
+  struct mib_list_node *nn;
+  s8_t insert;
+
+  LWIP_ASSERT("rn != NULL",rn != NULL);
+
+  /* -1 = malloc failure, 0 = not inserted, 1 = inserted, 2 = was present */
+  insert = 0;
+  if (rn->head == NULL)
+  {
+    /* empty list, add first node */
+    LWIP_DEBUGF(SNMP_MIB_DEBUG,("alloc empty list objid==%"S32_F"\n",objid));
+    nn = snmp_mib_ln_alloc(objid);
+    if (nn != NULL)
+    {
+      rn->head = nn;
+      rn->tail = nn;
+      *insn = nn;
+      insert = 1;
+    }
+    else
+    {
+      insert = -1;
+    }
+  }
+  else
+  {
+    struct mib_list_node *n;
+    /* at least one node is present */
+    n = rn->head;
+    while ((n != NULL) && (insert == 0))
+    {
+      if (n->objid == objid)
+      {
+        /* node is already there */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("node already there objid==%"S32_F"\n",objid));
+        *insn = n;
+        insert = 2;
+      }
+      else if (n->objid < objid)
+      {
+        if (n->next == NULL)
+        {
+          /* alloc and insert at the tail */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("alloc ins tail objid==%"S32_F"\n",objid));
+          nn = snmp_mib_ln_alloc(objid);
+          if (nn != NULL)
+          {
+            nn->next = NULL;
+            nn->prev = n;
+            n->next = nn;
+            rn->tail = nn;
+            *insn = nn;
+            insert = 1;
+          }
+          else
+          {
+            /* insertion failure */
+            insert = -1;
+          }
+        }
+        else
+        {
+          /* there's more to explore: traverse list */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("traverse list\n"));
+          n = n->next;
+        }
+      }
+      else
+      {
+        /* n->objid > objid */
+        /* alloc and insert between n->prev and n */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("alloc ins n->prev, objid==%"S32_F", n\n",objid));
+        nn = snmp_mib_ln_alloc(objid);
+        if (nn != NULL)
+        {
+          if (n->prev == NULL)
+          {
+            /* insert at the head */
+            nn->next = n;
+            nn->prev = NULL;
+            rn->head = nn;
+            n->prev = nn;
+          }
+          else
+          {
+            /* insert in the middle */
+            nn->next = n;
+            nn->prev = n->prev;
+            n->prev->next = nn;
+            n->prev = nn;
+          }
+          *insn = nn;
+          insert = 1;
+        }
+        else
+        {
+          /* insertion failure */
+          insert = -1;
+        }
+      }
+    }
+  }
+  if (insert == 1)
+  {
+    rn->count += 1;
+  }
+  LWIP_ASSERT("insert != 0",insert != 0);
+  return insert;
+}
+
+/**
+ * Finds node in idx list and returns deletion mark.
+ *
+ * @param rn points to the root node
+ * @param objid  is the object sub identifier
+ * @param fn returns pointer to found node
+ * @return 0 if not found, 1 if deletable,
+ *   2 can't delete (2 or more children), 3 not a list_node
+ */
+s8_t
+snmp_mib_node_find(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **fn)
+{
+  s8_t fc;
+  struct mib_list_node *n;
+
+  LWIP_ASSERT("rn != NULL",rn != NULL);
+  n = rn->head;
+  while ((n != NULL) && (n->objid != objid))
+  {
+    n = n->next;
+  }
+  if (n == NULL)
+  {
+    fc = 0;
+  }
+  else if (n->nptr == NULL)
+  {
+    /* leaf, can delete node */
+    fc = 1;
+  }
+  else
+  {
+    struct mib_list_rootnode *r;
+
+    if (n->nptr->node_type == MIB_NODE_LR)
+    {
+      r = (struct mib_list_rootnode *)n->nptr;
+      if (r->count > 1)
+      {
+        /* can't delete node */
+        fc = 2;
+      }
+      else
+      {
+        /* count <= 1, can delete node */
+        fc = 1;
+      }
+    }
+    else
+    {
+      /* other node type */
+      fc = 3;
+    }
+  }
+  *fn = n;
+  return fc;
+}
+
+/**
+ * Removes node from idx list
+ * if it has a single child left.
+ *
+ * @param rn points to the root node
+ * @param n points to the node to delete
+ * @return the nptr to be freed by caller
+ */
+struct mib_list_rootnode *
+snmp_mib_node_delete(struct mib_list_rootnode *rn, struct mib_list_node *n)
+{
+  struct mib_list_rootnode *next;
+
+  LWIP_ASSERT("rn != NULL",rn != NULL);
+  LWIP_ASSERT("n != NULL",n != NULL);
+
+  /* caller must remove this sub-tree */
+  next = (struct mib_list_rootnode*)(n->nptr);
+  rn->count -= 1;
+
+  if (n == rn->head)
+  {
+    rn->head = n->next;
+    if (n->next != NULL)
+    {
+      /* not last node, new list begin */
+      n->next->prev = NULL;
+    }
+  }
+  else if (n == rn->tail)
+  {
+    rn->tail = n->prev;
+    if (n->prev != NULL)
+    {
+      /* not last node, new list end */
+      n->prev->next = NULL;
+    }
+  }
+  else
+  {
+    /* node must be in the middle */
+    n->prev->next = n->next;
+    n->next->prev = n->prev;
+  }
+  LWIP_DEBUGF(SNMP_MIB_DEBUG,("free list objid==%"S32_F"\n",n->objid));
+  snmp_mib_ln_free(n);
+  if (rn->count == 0)
+  {
+    rn->head = NULL;
+    rn->tail = NULL;
+  }
+  return next;
+}
+
+
+
+/**
+ * Searches tree for the supplied (scalar?) object identifier.
+ *
+ * @param node points to the root of the tree ('.internet')
+ * @param ident_len the length of the supplied object identifier
+ * @param ident points to the array of sub identifiers
+ * @param np points to the found object instance (rerurn)
+ * @return pointer to the requested parent (!) node if success, NULL otherwise
+ */
+struct mib_node *
+snmp_search_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_name_ptr *np)
+{
+  u8_t node_type, ext_level;
+
+  ext_level = 0;
+  LWIP_DEBUGF(SNMP_MIB_DEBUG,("node==%p *ident==%"S32_F"\n",(void*)node,*ident));
+  while (node != NULL)
+  {
+    node_type = node->node_type;
+    if ((node_type == MIB_NODE_AR) || (node_type == MIB_NODE_RA))
+    {
+      struct mib_array_node *an;
+      u16_t i;
+
+      if (ident_len > 0)
+      {
+        /* array node (internal ROM or RAM, fixed length) */
+        an = (struct mib_array_node *)node;
+        i = 0;
+        while ((i < an->maxlength) && (an->objid[i] != *ident))
+        {
+          i++;
+        }
+        if (i < an->maxlength)
+        {
+          /* found it, if available proceed to child, otherwise inspect leaf */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("an->objid[%"U16_F"]==%"S32_F" *ident==%"S32_F"\n",i,an->objid[i],*ident));
+          if (an->nptr[i] == NULL)
+          {
+            /* a scalar leaf OR table,
+               inspect remaining instance number / table index */
+            np->ident_len = ident_len;
+            np->ident = ident;
+            return (struct mib_node*)an;
+          }
+          else
+          {
+            /* follow next child pointer */
+            ident++;
+            ident_len--;
+            node = an->nptr[i];
+          }
+        }
+        else
+        {
+          /* search failed, identifier mismatch (nosuchname) */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("an search failed *ident==%"S32_F"\n",*ident));
+          return NULL;
+        }
+      }
+      else
+      {
+        /* search failed, short object identifier (nosuchname) */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("an search failed, short object identifier\n"));
+        return NULL;
+      }
+    }
+    else if(node_type == MIB_NODE_LR)
+    {
+      struct mib_list_rootnode *lrn;
+      struct mib_list_node *ln;
+
+      if (ident_len > 0)
+      {
+        /* list root node (internal 'RAM', variable length) */
+        lrn = (struct mib_list_rootnode *)node;
+        ln = lrn->head;
+        /* iterate over list, head to tail */
+        while ((ln != NULL) && (ln->objid != *ident))
+        {
+          ln = ln->next;
+        }
+        if (ln != NULL)
+        {
+          /* found it, proceed to child */;
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln->objid==%"S32_F" *ident==%"S32_F"\n",ln->objid,*ident));
+          if (ln->nptr == NULL)
+          {
+            np->ident_len = ident_len;
+            np->ident = ident;
+            return (struct mib_node*)lrn;
+          }
+          else
+          {
+            /* follow next child pointer */
+            ident_len--;
+            ident++;
+            node = ln->nptr;
+          }
+        }
+        else
+        {
+          /* search failed */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln search failed *ident==%"S32_F"\n",*ident));
+          return NULL;
+        }
+      }
+      else
+      {
+        /* search failed, short object identifier (nosuchname) */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln search failed, short object identifier\n"));
+        return NULL;
+      }
+    }
+    else if(node_type == MIB_NODE_EX)
+    {
+      struct mib_external_node *en;
+      u16_t i, len;
+
+      if (ident_len > 0)
+      {
+        /* external node (addressing and access via functions) */
+        en = (struct mib_external_node *)node;
+
+        i = 0;
+        len = en->level_length(en->addr_inf,ext_level);
+        while ((i < len) && (en->ident_cmp(en->addr_inf,ext_level,i,*ident) != 0))
+        {
+          i++;
+        }
+        if (i < len)
+        {
+          s32_t debug_id;
+
+          en->get_objid(en->addr_inf,ext_level,i,&debug_id);
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("en->objid==%"S32_F" *ident==%"S32_F"\n",debug_id,*ident));
+          if ((ext_level + 1) == en->tree_levels)
+          {
+            np->ident_len = ident_len;
+            np->ident = ident;
+            return (struct mib_node*)en;
+          }
+          else
+          {
+            /* found it, proceed to child */
+            ident_len--;
+            ident++;
+            ext_level++;
+          }
+        }
+        else
+        {
+          /* search failed */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("en search failed *ident==%"S32_F"\n",*ident));
+          return NULL;
+        }
+      }
+      else
+      {
+        /* search failed, short object identifier (nosuchname) */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("en search failed, short object identifier\n"));
+        return NULL;
+      }
+    }
+    else if (node_type == MIB_NODE_SC)
+    {
+      mib_scalar_node *sn;
+
+      sn = (mib_scalar_node *)node;
+      if ((ident_len == 1) && (*ident == 0))
+      {
+        np->ident_len = ident_len;
+        np->ident = ident;
+        return (struct mib_node*)sn;
+      }
+      else
+      {
+        /* search failed, short object identifier (nosuchname) */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("search failed, invalid object identifier length\n"));
+        return NULL;
+      }
+    }
+    else
+    {
+      /* unknown node_type */
+      LWIP_DEBUGF(SNMP_MIB_DEBUG,("search failed node_type %"U16_F" unkown\n",(u16_t)node_type));
+      return NULL;
+    }
+  }
+  /* done, found nothing */
+  LWIP_DEBUGF(SNMP_MIB_DEBUG,("search failed node==%p\n",(void*)node));
+  return NULL;
+}
+
+/**
+ * Test table for presence of at least one table entry.
+ */
+static u8_t
+empty_table(struct mib_node *node)
+{
+  u8_t node_type;
+  u8_t empty = 0;
+
+  if (node != NULL)
+  {
+    node_type = node->node_type;
+    if (node_type == MIB_NODE_LR)
+    {
+      struct mib_list_rootnode *lrn;
+      lrn = (struct mib_list_rootnode *)node;
+      if ((lrn->count == 0) || (lrn->head == NULL))
+      {
+        empty = 1;
+      }
+    }
+    else if ((node_type == MIB_NODE_AR) || (node_type == MIB_NODE_RA))
+    {
+      struct mib_array_node *an;
+      an = (struct mib_array_node *)node;
+      if ((an->maxlength == 0) || (an->nptr == NULL))
+      {
+        empty = 1;
+      }
+    }
+    else if (node_type == MIB_NODE_EX)
+    {
+      struct mib_external_node *en;
+      en = (struct mib_external_node *)node;
+      if (en->tree_levels == 0)
+      {
+        empty = 1;
+      }
+    }
+  }
+  return empty;
+}
+
+/**
+ * Tree expansion.
+ */
+struct mib_node *
+snmp_expand_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret)
+{
+  u8_t node_type, ext_level, climb_tree;
+
+  ext_level = 0;
+  /* reset node stack */
+  node_stack_cnt = 0;
+  while (node != NULL)
+  {
+    climb_tree = 0;
+    node_type = node->node_type;
+    if ((node_type == MIB_NODE_AR) || (node_type == MIB_NODE_RA))
+    {
+      struct mib_array_node *an;
+      u16_t i;
+
+      /* array node (internal ROM or RAM, fixed length) */
+      an = (struct mib_array_node *)node;
+      if (ident_len > 0)
+      {
+        i = 0;
+        while ((i < an->maxlength) && (an->objid[i] < *ident))
+        {
+          i++;
+        }
+        if (i < an->maxlength)
+        {
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("an->objid[%"U16_F"]==%"S32_F" *ident==%"S32_F"\n",i,an->objid[i],*ident));
+          /* add identifier to oidret */
+          oidret->id[oidret->len] = an->objid[i];
+          (oidret->len)++;
+
+          if (an->nptr[i] == NULL)
+          {
+            LWIP_DEBUGF(SNMP_MIB_DEBUG,("leaf node\n"));
+            /* leaf node (e.g. in a fixed size table) */
+            if (an->objid[i] > *ident)
+            {
+              return (struct mib_node*)an;
+            }
+            else if ((i + 1) < an->maxlength)
+            {
+              /* an->objid[i] == *ident */
+              (oidret->len)--;
+              oidret->id[oidret->len] = an->objid[i + 1];
+              (oidret->len)++;
+              return (struct mib_node*)an;
+            }
+            else
+            {
+              /* (i + 1) == an->maxlength */
+              (oidret->len)--;
+              climb_tree = 1;
+            }
+          }
+          else
+          {
+            u8_t j;
+            struct nse cur_node;
+
+            LWIP_DEBUGF(SNMP_MIB_DEBUG,("non-leaf node\n"));
+            /* non-leaf, store right child ptr and id */
+            j = i + 1;
+            while ((j < an->maxlength) && (empty_table(an->nptr[j])))
+            {
+              j++;
+            }
+            if (j < an->maxlength)
+            {
+              cur_node.r_ptr = an->nptr[j];
+              cur_node.r_id = an->objid[j];
+              cur_node.r_nl = 0;
+            }
+            else
+            {
+              cur_node.r_ptr = NULL;
+            }
+            push_node(&cur_node);
+            if (an->objid[i] == *ident)
+            {
+              ident_len--;
+              ident++;
+            }
+            else
+            {
+              /* an->objid[i] < *ident */
+              ident_len = 0;
+            }
+            /* follow next child pointer */
+            node = an->nptr[i];
+          }
+        }
+        else
+        {
+          /* i == an->maxlength */
+          climb_tree = 1;
+        }
+      }
+      else
+      {
+        u8_t j;
+        /* ident_len == 0, complete with leftmost '.thing' */
+        j = 0;
+        while ((j < an->maxlength) && empty_table(an->nptr[j]))
+        {
+          j++;
+        }
+        if (j < an->maxlength)
+        {
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("left an->objid[j]==%"S32_F"\n",an->objid[j]));
+          oidret->id[oidret->len] = an->objid[j];
+          (oidret->len)++;
+          if (an->nptr[j] == NULL)
+          {
+            /* leaf node */
+            return (struct mib_node*)an;
+          }
+          else
+          {
+            /* no leaf, continue */
+            node = an->nptr[j];
+          }
+        }
+        else
+        {
+          /* j == an->maxlength */
+          climb_tree = 1;
+        }
+      }
+    }
+    else if(node_type == MIB_NODE_LR)
+    {
+      struct mib_list_rootnode *lrn;
+      struct mib_list_node *ln;
+
+      /* list root node (internal 'RAM', variable length) */
+      lrn = (struct mib_list_rootnode *)node;
+      if (ident_len > 0)
+      {
+        ln = lrn->head;
+        /* iterate over list, head to tail */
+        while ((ln != NULL) && (ln->objid < *ident))
+        {
+          ln = ln->next;
+        }
+        if (ln != NULL)
+        {
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln->objid==%"S32_F" *ident==%"S32_F"\n",ln->objid,*ident));
+          oidret->id[oidret->len] = ln->objid;
+          (oidret->len)++;
+          if (ln->nptr == NULL)
+          {
+            /* leaf node */
+            if (ln->objid > *ident)
+            {
+              return (struct mib_node*)lrn;
+            }
+            else if (ln->next != NULL)
+            {
+              /* ln->objid == *ident */
+              (oidret->len)--;
+              oidret->id[oidret->len] = ln->next->objid;
+              (oidret->len)++;
+              return (struct mib_node*)lrn;
+            }
+            else
+            {
+              /* ln->next == NULL */
+              (oidret->len)--;
+              climb_tree = 1;
+            }
+          }
+          else
+          {
+            struct mib_list_node *jn;
+            struct nse cur_node;
+
+            /* non-leaf, store right child ptr and id */
+            jn = ln->next;
+            while ((jn != NULL) && empty_table(jn->nptr))
+            {
+              jn = jn->next;
+            }
+            if (jn != NULL)
+            {
+              cur_node.r_ptr = jn->nptr;
+              cur_node.r_id = jn->objid;
+              cur_node.r_nl = 0;
+            }
+            else
+            {
+              cur_node.r_ptr = NULL;
+            }
+            push_node(&cur_node);
+            if (ln->objid == *ident)
+            {
+              ident_len--;
+              ident++;
+            }
+            else
+            {
+              /* ln->objid < *ident */
+              ident_len = 0;
+            }
+            /* follow next child pointer */
+            node = ln->nptr;
+          }
+
+        }
+        else
+        {
+          /* ln == NULL */
+          climb_tree = 1;
+        }
+      }
+      else
+      {
+        struct mib_list_node *jn;
+        /* ident_len == 0, complete with leftmost '.thing' */
+        jn = lrn->head;
+        while ((jn != NULL) && empty_table(jn->nptr))
+        {
+          jn = jn->next;
+        }
+        if (jn != NULL)
+        {
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("left jn->objid==%"S32_F"\n",jn->objid));
+          oidret->id[oidret->len] = jn->objid;
+          (oidret->len)++;
+          if (jn->nptr == NULL)
+          {
+            /* leaf node */
+            LWIP_DEBUGF(SNMP_MIB_DEBUG,("jn->nptr == NULL\n"));
+            return (struct mib_node*)lrn;
+          }
+          else
+          {
+            /* no leaf, continue */
+            node = jn->nptr;
+          }
+        }
+        else
+        {
+          /* jn == NULL */
+          climb_tree = 1;
+        }
+      }
+    }
+    else if(node_type == MIB_NODE_EX)
+    {
+      struct mib_external_node *en;
+      s32_t ex_id;
+
+      /* external node (addressing and access via functions) */
+      en = (struct mib_external_node *)node;
+      if (ident_len > 0)
+      {
+        u16_t i, len;
+
+        i = 0;
+        len = en->level_length(en->addr_inf,ext_level);
+        while ((i < len) && (en->ident_cmp(en->addr_inf,ext_level,i,*ident) < 0))
+        {
+          i++;
+        }
+        if (i < len)
+        {
+          /* add identifier to oidret */
+          en->get_objid(en->addr_inf,ext_level,i,&ex_id);
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("en->objid[%"U16_F"]==%"S32_F" *ident==%"S32_F"\n",i,ex_id,*ident));
+          oidret->id[oidret->len] = ex_id;
+          (oidret->len)++;
+
+          if ((ext_level + 1) == en->tree_levels)
+          {
+            LWIP_DEBUGF(SNMP_MIB_DEBUG,("leaf node\n"));
+            /* leaf node */
+            if (ex_id > *ident)
+            {
+              return (struct mib_node*)en;
+            }
+            else if ((i + 1) < len)
+            {
+              /* ex_id == *ident */
+              en->get_objid(en->addr_inf,ext_level,i + 1,&ex_id);
+              (oidret->len)--;
+              oidret->id[oidret->len] = ex_id;
+              (oidret->len)++;
+              return (struct mib_node*)en;
+            }
+            else
+            {
+              /* (i + 1) == len */
+              (oidret->len)--;
+              climb_tree = 1;
+            }
+          }
+          else
+          {
+            u8_t j;
+            struct nse cur_node;
+
+            LWIP_DEBUGF(SNMP_MIB_DEBUG,("non-leaf node\n"));
+            /* non-leaf, store right child ptr and id */
+            j = i + 1;
+            if (j < len)
+            {
+              /* right node is the current external node */
+              cur_node.r_ptr = node;
+              en->get_objid(en->addr_inf,ext_level,j,&cur_node.r_id);
+              cur_node.r_nl = ext_level + 1;
+            }
+            else
+            {
+              cur_node.r_ptr = NULL;
+            }
+            push_node(&cur_node);
+            if (en->ident_cmp(en->addr_inf,ext_level,i,*ident) == 0)
+            {
+              ident_len--;
+              ident++;
+            }
+            else
+            {
+              /* external id < *ident */
+              ident_len = 0;
+            }
+            /* proceed to child */
+            ext_level++;
+          }
+        }
+        else
+        {
+          /* i == len (en->level_len()) */
+          climb_tree = 1;
+        }
+      }
+      else
+      {
+        /* ident_len == 0, complete with leftmost '.thing' */
+        en->get_objid(en->addr_inf,ext_level,0,&ex_id);
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("left en->objid==%"S32_F"\n",ex_id));
+        oidret->id[oidret->len] = ex_id;
+        (oidret->len)++;
+        if ((ext_level + 1) == en->tree_levels)
+        {
+          /* leaf node */
+          LWIP_DEBUGF(SNMP_MIB_DEBUG,("(ext_level + 1) == en->tree_levels\n"));
+          return (struct mib_node*)en;
+        }
+        else
+        {
+          /* no leaf, proceed to child */
+          ext_level++;
+        }
+      }
+    }
+    else if(node_type == MIB_NODE_SC)
+    {
+      mib_scalar_node *sn;
+
+      /* scalar node  */
+      sn = (mib_scalar_node *)node;
+      if (ident_len > 0)
+      {
+        /* at .0 */
+        climb_tree = 1;
+      }
+      else
+      {
+        /* ident_len == 0, complete object identifier */
+        oidret->id[oidret->len] = 0;
+        (oidret->len)++;
+        /* leaf node */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("completed scalar leaf\n"));
+        return (struct mib_node*)sn;
+      }
+    }
+    else
+    {
+      /* unknown/unhandled node_type */
+      LWIP_DEBUGF(SNMP_MIB_DEBUG,("expand failed node_type %"U16_F" unkown\n",(u16_t)node_type));
+      return NULL;
+    }
+
+    if (climb_tree)
+    {
+      struct nse child;
+
+      /* find right child ptr */
+      child.r_ptr = NULL;
+      child.r_id = 0;
+      child.r_nl = 0;
+      while ((node_stack_cnt > 0) && (child.r_ptr == NULL))
+      {
+        pop_node(&child);
+        /* trim returned oid */
+        (oidret->len)--;
+      }
+      if (child.r_ptr != NULL)
+      {
+        /* incoming ident is useless beyond this point */
+        ident_len = 0;
+        oidret->id[oidret->len] = child.r_id;
+        oidret->len++;
+        node = child.r_ptr;
+        ext_level = child.r_nl;
+      }
+      else
+      {
+        /* tree ends here ... */
+        LWIP_DEBUGF(SNMP_MIB_DEBUG,("expand failed, tree ends here\n"));
+        return NULL;
+      }
+    }
+  }
+  /* done, found nothing */
+  LWIP_DEBUGF(SNMP_MIB_DEBUG,("expand failed node==%p\n",(void*)node));
+  return NULL;
+}
+
+/**
+ * Test object identifier for the iso.org.dod.internet prefix.
+ *
+ * @param ident_len the length of the supplied object identifier
+ * @param ident points to the array of sub identifiers
+ * @return 1 if it matches, 0 otherwise
+ */
+u8_t
+snmp_iso_prefix_tst(u8_t ident_len, s32_t *ident)
+{
+  if ((ident_len > 3) &&
+      (ident[0] == 1) && (ident[1] == 3) &&
+      (ident[2] == 6) && (ident[3] == 1))
+  {
+    return 1;
+  }
+  else
+  {
+    return 0;
+  }
+}
+
+/**
+ * Expands object identifier to the iso.org.dod.internet
+ * prefix for use in getnext operation.
+ *
+ * @param ident_len the length of the supplied object identifier
+ * @param ident points to the array of sub identifiers
+ * @param oidret points to returned expanded object identifier
+ * @return 1 if it matches, 0 otherwise
+ *
+ * @note ident_len 0 is allowed, expanding to the first known object id!!
+ */
+u8_t
+snmp_iso_prefix_expand(u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret)
+{
+  const s32_t *prefix_ptr;
+  s32_t *ret_ptr;
+  u8_t i;
+
+  i = 0;
+  prefix_ptr = &prefix[0];
+  ret_ptr = &oidret->id[0];
+  ident_len = ((ident_len < 4)?ident_len:4);
+  while ((i < ident_len) && ((*ident) <= (*prefix_ptr)))
+  {
+    *ret_ptr++ = *prefix_ptr++;
+    ident++;
+    i++;
+  }
+  if (i == ident_len)
+  {
+    /* match, complete missing bits */
+    while (i < 4)
+    {
+      *ret_ptr++ = *prefix_ptr++;
+      i++;
+    }
+    oidret->len = i;
+    return 1;
+  }
+  else
+  {
+    /* i != ident_len */
+    return 0;
+  }
+}
+
+#endif /* LWIP_SNMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/msg_in.c b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/msg_in.c
new file mode 100644
index 000000000..d0c3c7534
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/msg_in.c
@@ -0,0 +1,1454 @@
+/**
+ * @file
+ * SNMP input message processing (RFC1157).
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/ip_addr.h"
+#include "lwip/mem.h"
+#include "lwip/udp.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+#include "lwip/snmp_asn1.h"
+#include "lwip/snmp_msg.h"
+#include "lwip/snmp_structs.h"
+
+#include <string.h>
+
+/* public (non-static) constants */
+/** SNMP v1 == 0 */
+const s32_t snmp_version = 0;
+/** default SNMP community string */
+const char snmp_publiccommunity[7] = "public";
+
+/* statically allocated buffers for SNMP_CONCURRENT_REQUESTS */
+struct snmp_msg_pstat msg_input_list[SNMP_CONCURRENT_REQUESTS];
+/* UDP Protocol Control Block */
+struct udp_pcb *snmp1_pcb;
+
+static void snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port);
+static err_t snmp_pdu_header_check(struct pbuf *p, u16_t ofs, u16_t pdu_len, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat);
+static err_t snmp_pdu_dec_varbindlist(struct pbuf *p, u16_t ofs, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat);
+
+
+/**
+ * Starts SNMP Agent.
+ * Allocates UDP pcb and binds it to IP_ADDR_ANY port 161.
+ */
+void
+snmp_init(void)
+{
+  struct snmp_msg_pstat *msg_ps;
+  u8_t i;
+
+  snmp1_pcb = udp_new();
+  if (snmp1_pcb != NULL)
+  {
+    udp_recv(snmp1_pcb, snmp_recv, (void *)SNMP_IN_PORT);
+    udp_bind(snmp1_pcb, IP_ADDR_ANY, SNMP_IN_PORT);
+  }
+  msg_ps = &msg_input_list[0];
+  for (i=0; i<SNMP_CONCURRENT_REQUESTS; i++)
+  {
+    msg_ps->state = SNMP_MSG_EMPTY;
+    msg_ps->error_index = 0;
+    msg_ps->error_status = SNMP_ES_NOERROR;
+    msg_ps++;
+  }
+  trap_msg.pcb = snmp1_pcb;
+  /* The coldstart trap will only be output
+     if our outgoing interface is up & configured  */
+  snmp_coldstart_trap();
+}
+
+static void
+snmp_error_response(struct snmp_msg_pstat *msg_ps, u8_t error)
+{
+  snmp_varbind_list_free(&msg_ps->outvb);
+  msg_ps->outvb = msg_ps->invb;
+  msg_ps->invb.head = NULL;
+  msg_ps->invb.tail = NULL;
+  msg_ps->invb.count = 0;
+  msg_ps->error_status = error;
+  msg_ps->error_index = 1 + msg_ps->vb_idx;
+  snmp_send_response(msg_ps);
+  snmp_varbind_list_free(&msg_ps->outvb);
+  msg_ps->state = SNMP_MSG_EMPTY;
+}
+
+static void
+snmp_ok_response(struct snmp_msg_pstat *msg_ps)
+{
+  err_t err_ret;
+
+  err_ret = snmp_send_response(msg_ps);
+  if (err_ret == ERR_MEM)
+  {
+    /* serious memory problem, can't return tooBig */
+  }
+  else
+  {
+    LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event = %"S32_F"\n",msg_ps->error_status));
+  }
+  /* free varbinds (if available) */
+  snmp_varbind_list_free(&msg_ps->invb);
+  snmp_varbind_list_free(&msg_ps->outvb);
+  msg_ps->state = SNMP_MSG_EMPTY;
+}
+
+/**
+ * Service an internal or external event for SNMP GET.
+ *
+ * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
+ * @param msg_ps points to the assosicated message process state
+ */
+static void
+snmp_msg_get_event(u8_t request_id, struct snmp_msg_pstat *msg_ps)
+{
+  LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_get_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state));
+
+  if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF)
+  {
+    struct mib_external_node *en;
+    struct snmp_name_ptr np;
+
+    /* get_object_def() answer*/
+    en = msg_ps->ext_mib_node;
+    np = msg_ps->ext_name_ptr;
+
+    /* translate answer into a known lifeform */
+    en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def);
+    if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE)
+    {
+      msg_ps->state = SNMP_MSG_EXTERNAL_GET_VALUE;
+      en->get_value_q(request_id, &msg_ps->ext_object_def);
+    }
+    else
+    {
+      en->get_object_def_pc(request_id, np.ident_len, np.ident);
+      /* search failed, object id points to unknown object (nosuchname) */
+      snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+    }
+  }
+  else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_VALUE)
+  {
+    struct mib_external_node *en;
+    struct snmp_varbind *vb;
+
+    /* get_value() answer */
+    en = msg_ps->ext_mib_node;
+
+    /* allocate output varbind */
+    vb = (struct snmp_varbind *)mem_malloc(sizeof(struct snmp_varbind));
+    LWIP_ASSERT("vb != NULL",vb != NULL);
+    if (vb != NULL)
+    {
+      vb->next = NULL;
+      vb->prev = NULL;
+
+      /* move name from invb to outvb */
+      vb->ident = msg_ps->vb_ptr->ident;
+      vb->ident_len = msg_ps->vb_ptr->ident_len;
+      /* ensure this memory is refereced once only */
+      msg_ps->vb_ptr->ident = NULL;
+      msg_ps->vb_ptr->ident_len = 0;
+
+      vb->value_type = msg_ps->ext_object_def.asn_type;
+      vb->value_len =  msg_ps->ext_object_def.v_len;
+      if (vb->value_len > 0)
+      {
+        vb->value = mem_malloc(vb->value_len);
+        LWIP_ASSERT("vb->value != NULL",vb->value != NULL);
+        if (vb->value != NULL)
+        {
+          en->get_value_a(request_id, &msg_ps->ext_object_def, vb->value_len, vb->value);
+          snmp_varbind_tail_add(&msg_ps->outvb, vb);
+          /* search again (if vb_idx < msg_ps->invb.count) */
+          msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+          msg_ps->vb_idx += 1;
+        }
+        else
+        {
+          en->get_value_pc(request_id, &msg_ps->ext_object_def);
+          LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: no variable space\n"));
+          msg_ps->vb_ptr->ident = vb->ident;
+          msg_ps->vb_ptr->ident_len = vb->ident_len;
+          mem_free(vb);
+          snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
+        }
+      }
+      else
+      {
+        /* vb->value_len == 0, empty value (e.g. empty string) */
+        en->get_value_a(request_id, &msg_ps->ext_object_def, 0, NULL);
+        vb->value = NULL;
+        snmp_varbind_tail_add(&msg_ps->outvb, vb);
+        /* search again (if vb_idx < msg_ps->invb.count) */
+        msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+        msg_ps->vb_idx += 1;
+      }
+    }
+    else
+    {
+      en->get_value_pc(request_id, &msg_ps->ext_object_def);
+      LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: no outvb space\n"));
+      snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
+    }
+  }
+
+  while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
+         (msg_ps->vb_idx < msg_ps->invb.count))
+  {
+    struct mib_node *mn;
+    struct snmp_name_ptr np;
+
+    if (msg_ps->vb_idx == 0)
+    {
+      msg_ps->vb_ptr = msg_ps->invb.head;
+    }
+    else
+    {
+      msg_ps->vb_ptr = msg_ps->vb_ptr->next;
+    }
+    /** test object identifier for .iso.org.dod.internet prefix */
+    if (snmp_iso_prefix_tst(msg_ps->vb_ptr->ident_len,  msg_ps->vb_ptr->ident))
+    {
+      mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4,
+                             msg_ps->vb_ptr->ident + 4, &np);
+      if (mn != NULL)
+      {
+        if (mn->node_type == MIB_NODE_EX)
+        {
+          /* external object */
+          struct mib_external_node *en = (struct mib_external_node*)mn;
+
+          msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF;
+          /* save en && args in msg_ps!! */
+          msg_ps->ext_mib_node = en;
+          msg_ps->ext_name_ptr = np;
+
+          en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident);
+        }
+        else
+        {
+          /* internal object */
+          struct obj_def object_def;
+
+          msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF;
+          mn->get_object_def(np.ident_len, np.ident, &object_def);
+          if (object_def.instance != MIB_OBJECT_NONE)
+          {
+            mn = mn;
+          }
+          else
+          {
+            /* search failed, object id points to unknown object (nosuchname) */
+            mn =  NULL;
+          }
+          if (mn != NULL)
+          {
+            struct snmp_varbind *vb;
+
+            msg_ps->state = SNMP_MSG_INTERNAL_GET_VALUE;
+            /* allocate output varbind */
+            vb = (struct snmp_varbind *)mem_malloc(sizeof(struct snmp_varbind));
+            LWIP_ASSERT("vb != NULL",vb != NULL);
+            if (vb != NULL)
+            {
+              vb->next = NULL;
+              vb->prev = NULL;
+
+              /* move name from invb to outvb */
+              vb->ident = msg_ps->vb_ptr->ident;
+              vb->ident_len = msg_ps->vb_ptr->ident_len;
+              /* ensure this memory is refereced once only */
+              msg_ps->vb_ptr->ident = NULL;
+              msg_ps->vb_ptr->ident_len = 0;
+
+              vb->value_type = object_def.asn_type;
+              vb->value_len = object_def.v_len;
+              if (vb->value_len > 0)
+              {
+                vb->value = mem_malloc(vb->value_len);
+                LWIP_ASSERT("vb->value != NULL",vb->value != NULL);
+                if (vb->value != NULL)
+                {
+                  mn->get_value(&object_def, vb->value_len, vb->value);
+                  snmp_varbind_tail_add(&msg_ps->outvb, vb);
+                  msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+                  msg_ps->vb_idx += 1;
+                }
+                else
+                {
+                  LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: couldn't allocate variable space\n"));
+                  msg_ps->vb_ptr->ident = vb->ident;
+                  msg_ps->vb_ptr->ident_len = vb->ident_len;
+                  mem_free(vb);
+                  snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
+                }
+              }
+              else
+              {
+                /* vb->value_len == 0, empty value (e.g. empty string) */
+                vb->value = NULL;
+                snmp_varbind_tail_add(&msg_ps->outvb, vb);
+                msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+                msg_ps->vb_idx += 1;
+              }
+            }
+            else
+            {
+              LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_event: couldn't allocate outvb space\n"));
+              snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
+            }
+          }
+        }
+      }
+    }
+    else
+    {
+      mn = NULL;
+    }
+    if (mn == NULL)
+    {
+      /* mn == NULL, noSuchName */
+      snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+    }
+  }
+  if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
+      (msg_ps->vb_idx == msg_ps->invb.count))
+  {
+    snmp_ok_response(msg_ps);
+  }
+}
+
+/**
+ * Service an internal or external event for SNMP GETNEXT.
+ *
+ * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
+ * @param msg_ps points to the assosicated message process state
+ */
+static void
+snmp_msg_getnext_event(u8_t request_id, struct snmp_msg_pstat *msg_ps)
+{
+  LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_getnext_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state));
+
+  if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF)
+  {
+    struct mib_external_node *en;
+
+    /* get_object_def() answer*/
+    en = msg_ps->ext_mib_node;
+
+    /* translate answer into a known lifeform */
+    en->get_object_def_a(request_id, 1, &msg_ps->ext_oid.id[msg_ps->ext_oid.len - 1], &msg_ps->ext_object_def);
+    if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE)
+    {
+      msg_ps->state = SNMP_MSG_EXTERNAL_GET_VALUE;
+      en->get_value_q(request_id, &msg_ps->ext_object_def);
+    }
+    else
+    {
+      en->get_object_def_pc(request_id, 1, &msg_ps->ext_oid.id[msg_ps->ext_oid.len - 1]);
+      /* search failed, object id points to unknown object (nosuchname) */
+      snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+    }
+  }
+  else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_VALUE)
+  {
+    struct mib_external_node *en;
+    struct snmp_varbind *vb;
+
+    /* get_value() answer */
+    en = msg_ps->ext_mib_node;
+
+    vb = snmp_varbind_alloc(&msg_ps->ext_oid,
+                            msg_ps->ext_object_def.asn_type,
+                            msg_ps->ext_object_def.v_len);
+    if (vb != NULL)
+    {
+      en->get_value_a(request_id, &msg_ps->ext_object_def, vb->value_len, vb->value);
+      snmp_varbind_tail_add(&msg_ps->outvb, vb);
+      msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+      msg_ps->vb_idx += 1;
+    }
+    else
+    {
+      en->get_value_pc(request_id, &msg_ps->ext_object_def);
+      LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_getnext_event: couldn't allocate outvb space\n"));
+      snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
+    }
+  }
+
+  while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
+         (msg_ps->vb_idx < msg_ps->invb.count))
+  {
+    struct mib_node *mn;
+    struct snmp_obj_id oid;
+
+    if (msg_ps->vb_idx == 0)
+    {
+      msg_ps->vb_ptr = msg_ps->invb.head;
+    }
+    else
+    {
+      msg_ps->vb_ptr = msg_ps->vb_ptr->next;
+    }
+    if (snmp_iso_prefix_expand(msg_ps->vb_ptr->ident_len, msg_ps->vb_ptr->ident, &oid))
+    {
+      if (msg_ps->vb_ptr->ident_len > 3)
+      {
+        /* can offset ident_len and ident */
+        mn = snmp_expand_tree((struct mib_node*)&internet,
+                              msg_ps->vb_ptr->ident_len - 4,
+                              msg_ps->vb_ptr->ident + 4, &oid);
+      }
+      else
+      {
+        /* can't offset ident_len -4, ident + 4 */
+        mn = snmp_expand_tree((struct mib_node*)&internet, 0, NULL, &oid);
+      }
+    }
+    else
+    {
+      mn = NULL;
+    }
+    if (mn != NULL)
+    {
+      if (mn->node_type == MIB_NODE_EX)
+      {
+        /* external object */
+        struct mib_external_node *en = (struct mib_external_node*)mn;
+
+        msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF;
+        /* save en && args in msg_ps!! */
+        msg_ps->ext_mib_node = en;
+        msg_ps->ext_oid = oid;
+
+        en->get_object_def_q(en->addr_inf, request_id, 1, &oid.id[oid.len - 1]);
+      }
+      else
+      {
+        /* internal object */
+        struct obj_def object_def;
+        struct snmp_varbind *vb;
+
+        msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF;
+        mn->get_object_def(1, &oid.id[oid.len - 1], &object_def);
+
+        vb = snmp_varbind_alloc(&oid, object_def.asn_type, object_def.v_len);
+        if (vb != NULL)
+        {
+          msg_ps->state = SNMP_MSG_INTERNAL_GET_VALUE;
+          mn->get_value(&object_def, object_def.v_len, vb->value);
+          snmp_varbind_tail_add(&msg_ps->outvb, vb);
+          msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+          msg_ps->vb_idx += 1;
+        }
+        else
+        {
+          LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv couldn't allocate outvb space\n"));
+          snmp_error_response(msg_ps,SNMP_ES_TOOBIG);
+        }
+      }
+    }
+    if (mn == NULL)
+    {
+      /* mn == NULL, noSuchName */
+      snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+    }
+  }
+  if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
+      (msg_ps->vb_idx == msg_ps->invb.count))
+  {
+    snmp_ok_response(msg_ps);
+  }
+}
+
+/**
+ * Service an internal or external event for SNMP SET.
+ *
+ * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
+ * @param msg_ps points to the assosicated message process state
+ */
+static void
+snmp_msg_set_event(u8_t request_id, struct snmp_msg_pstat *msg_ps)
+{
+  LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_msg_set_event: msg_ps->state==%"U16_F"\n",(u16_t)msg_ps->state));
+
+  if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF)
+  {
+    struct mib_external_node *en;
+    struct snmp_name_ptr np;
+
+    /* get_object_def() answer*/
+    en = msg_ps->ext_mib_node;
+    np = msg_ps->ext_name_ptr;
+
+    /* translate answer into a known lifeform */
+    en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def);
+    if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE)
+    {
+      msg_ps->state = SNMP_MSG_EXTERNAL_SET_TEST;
+      en->set_test_q(request_id, &msg_ps->ext_object_def);
+    }
+    else
+    {
+      en->get_object_def_pc(request_id, np.ident_len, np.ident);
+      /* search failed, object id points to unknown object (nosuchname) */
+      snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+    }
+  }
+  else if (msg_ps->state == SNMP_MSG_EXTERNAL_SET_TEST)
+  {
+    struct mib_external_node *en;
+
+    /* set_test() answer*/
+    en = msg_ps->ext_mib_node;
+
+    if (msg_ps->ext_object_def.access == MIB_OBJECT_READ_WRITE)
+    {
+       if ((msg_ps->ext_object_def.asn_type == msg_ps->vb_ptr->value_type) &&
+           (en->set_test_a(request_id,&msg_ps->ext_object_def,
+                           msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value) != 0))
+      {
+        msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+        msg_ps->vb_idx += 1;
+      }
+      else
+      {
+        en->set_test_pc(request_id,&msg_ps->ext_object_def);
+        /* bad value */
+        snmp_error_response(msg_ps,SNMP_ES_BADVALUE);
+      }
+    }
+    else
+    {
+      en->set_test_pc(request_id,&msg_ps->ext_object_def);
+      /* object not available for set */
+      snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+    }
+  }
+  else if (msg_ps->state == SNMP_MSG_EXTERNAL_GET_OBJDEF_S)
+  {
+    struct mib_external_node *en;
+    struct snmp_name_ptr np;
+
+    /* get_object_def() answer*/
+    en = msg_ps->ext_mib_node;
+    np = msg_ps->ext_name_ptr;
+
+    /* translate answer into a known lifeform */
+    en->get_object_def_a(request_id, np.ident_len, np.ident, &msg_ps->ext_object_def);
+    if (msg_ps->ext_object_def.instance != MIB_OBJECT_NONE)
+    {
+      msg_ps->state = SNMP_MSG_EXTERNAL_SET_VALUE;
+      en->set_value_q(request_id, &msg_ps->ext_object_def,
+                      msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value);
+    }
+    else
+    {
+      en->get_object_def_pc(request_id, np.ident_len, np.ident);
+      /* set_value failed, object has disappeared for some odd reason?? */
+      snmp_error_response(msg_ps,SNMP_ES_GENERROR);
+    }
+  }
+  else if (msg_ps->state == SNMP_MSG_EXTERNAL_SET_VALUE)
+  {
+    struct mib_external_node *en;
+
+    /** set_value_a() */
+    en = msg_ps->ext_mib_node;
+    en->set_value_a(request_id, &msg_ps->ext_object_def,
+      msg_ps->vb_ptr->value_len, msg_ps->vb_ptr->value);
+
+    /** @todo use set_value_pc() if toobig */
+    msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE;
+    msg_ps->vb_idx += 1;
+  }
+
+  /* test all values before setting */
+  while ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
+         (msg_ps->vb_idx < msg_ps->invb.count))
+  {
+    struct mib_node *mn;
+    struct snmp_name_ptr np;
+
+    if (msg_ps->vb_idx == 0)
+    {
+      msg_ps->vb_ptr = msg_ps->invb.head;
+    }
+    else
+    {
+      msg_ps->vb_ptr = msg_ps->vb_ptr->next;
+    }
+    /** test object identifier for .iso.org.dod.internet prefix */
+    if (snmp_iso_prefix_tst(msg_ps->vb_ptr->ident_len,  msg_ps->vb_ptr->ident))
+    {
+      mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4,
+                             msg_ps->vb_ptr->ident + 4, &np);
+      if (mn != NULL)
+      {
+        if (mn->node_type == MIB_NODE_EX)
+        {
+          /* external object */
+          struct mib_external_node *en = (struct mib_external_node*)mn;
+
+          msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF;
+          /* save en && args in msg_ps!! */
+          msg_ps->ext_mib_node = en;
+          msg_ps->ext_name_ptr = np;
+
+          en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident);
+        }
+        else
+        {
+          /* internal object */
+          struct obj_def object_def;
+
+          msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF;
+          mn->get_object_def(np.ident_len, np.ident, &object_def);
+          if (object_def.instance != MIB_OBJECT_NONE)
+          {
+            mn = mn;
+          }
+          else
+          {
+            /* search failed, object id points to unknown object (nosuchname) */
+            mn = NULL;
+          }
+          if (mn != NULL)
+          {
+            msg_ps->state = SNMP_MSG_INTERNAL_SET_TEST;
+
+            if (object_def.access == MIB_OBJECT_READ_WRITE)
+            {
+              if ((object_def.asn_type == msg_ps->vb_ptr->value_type) &&
+                  (mn->set_test(&object_def,msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value) != 0))
+              {
+                msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+                msg_ps->vb_idx += 1;
+              }
+              else
+              {
+                /* bad value */
+                snmp_error_response(msg_ps,SNMP_ES_BADVALUE);
+              }
+            }
+            else
+            {
+              /* object not available for set */
+              snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+            }
+          }
+        }
+      }
+    }
+    else
+    {
+      mn = NULL;
+    }
+    if (mn == NULL)
+    {
+      /* mn == NULL, noSuchName */
+      snmp_error_response(msg_ps,SNMP_ES_NOSUCHNAME);
+    }
+  }
+
+  if ((msg_ps->state == SNMP_MSG_SEARCH_OBJ) &&
+      (msg_ps->vb_idx == msg_ps->invb.count))
+  {
+    msg_ps->vb_idx = 0;
+    msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE;
+  }
+
+  /* set all values "atomically" (be as "atomic" as possible) */
+  while ((msg_ps->state == SNMP_MSG_INTERNAL_SET_VALUE) &&
+         (msg_ps->vb_idx < msg_ps->invb.count))
+  {
+    struct mib_node *mn;
+    struct snmp_name_ptr np;
+
+    if (msg_ps->vb_idx == 0)
+    {
+      msg_ps->vb_ptr = msg_ps->invb.head;
+    }
+    else
+    {
+      msg_ps->vb_ptr = msg_ps->vb_ptr->next;
+    }
+    /* skip iso prefix test, was done previously while settesting() */
+    mn = snmp_search_tree((struct mib_node*)&internet, msg_ps->vb_ptr->ident_len - 4,
+                           msg_ps->vb_ptr->ident + 4, &np);
+    /* check if object is still available
+       (e.g. external hot-plug thingy present?) */
+    if (mn != NULL)
+    {
+      if (mn->node_type == MIB_NODE_EX)
+      {
+        /* external object */
+        struct mib_external_node *en = (struct mib_external_node*)mn;
+
+        msg_ps->state = SNMP_MSG_EXTERNAL_GET_OBJDEF_S;
+        /* save en && args in msg_ps!! */
+        msg_ps->ext_mib_node = en;
+        msg_ps->ext_name_ptr = np;
+
+        en->get_object_def_q(en->addr_inf, request_id, np.ident_len, np.ident);
+      }
+      else
+      {
+        /* internal object */
+        struct obj_def object_def;
+
+        msg_ps->state = SNMP_MSG_INTERNAL_GET_OBJDEF_S;
+        mn->get_object_def(np.ident_len, np.ident, &object_def);
+        msg_ps->state = SNMP_MSG_INTERNAL_SET_VALUE;
+        mn->set_value(&object_def,msg_ps->vb_ptr->value_len,msg_ps->vb_ptr->value);
+        msg_ps->vb_idx += 1;
+      }
+    }
+  }
+  if ((msg_ps->state == SNMP_MSG_INTERNAL_SET_VALUE) &&
+      (msg_ps->vb_idx == msg_ps->invb.count))
+  {
+    /* simply echo the input if we can set it
+       @todo do we need to return the actual value?
+       e.g. if value is silently modified or behaves sticky? */
+    msg_ps->outvb = msg_ps->invb;
+    msg_ps->invb.head = NULL;
+    msg_ps->invb.tail = NULL;
+    msg_ps->invb.count = 0;
+    snmp_ok_response(msg_ps);
+  }
+}
+
+
+/**
+ * Handle one internal or external event.
+ * Called for one async event. (recv external/private answer)
+ *
+ * @param request_id identifies requests from 0 to (SNMP_CONCURRENT_REQUESTS-1)
+ */
+void
+snmp_msg_event(u8_t request_id)
+{
+  struct snmp_msg_pstat *msg_ps;
+
+  if (request_id < SNMP_CONCURRENT_REQUESTS)
+  {
+    msg_ps = &msg_input_list[request_id];
+    if (msg_ps->rt == SNMP_ASN1_PDU_GET_NEXT_REQ)
+    {
+      snmp_msg_getnext_event(request_id, msg_ps);
+    }
+    else if (msg_ps->rt == SNMP_ASN1_PDU_GET_REQ)
+    {
+      snmp_msg_get_event(request_id, msg_ps);
+    }
+    else if(msg_ps->rt == SNMP_ASN1_PDU_SET_REQ)
+    {
+      snmp_msg_set_event(request_id, msg_ps);
+    }
+  }
+}
+
+
+/* lwIP UDP receive callback function */
+static void
+snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *addr, u16_t port)
+{
+  struct udp_hdr *udphdr;
+
+  /* suppress unused argument warning */
+  LWIP_UNUSED_ARG(arg);
+  /* peek in the UDP header (goto IP payload) */
+  if(pbuf_header(p, UDP_HLEN)){
+    LWIP_ASSERT("Can't move to UDP header", 0);
+    pbuf_free(p);
+    return;
+  }
+  udphdr = p->payload;
+
+  /* check if datagram is really directed at us (including broadcast requests) */
+  if ((pcb == snmp1_pcb) && (ntohs(udphdr->dest) == SNMP_IN_PORT))
+  {
+    struct snmp_msg_pstat *msg_ps;
+    u8_t req_idx;
+
+    /* traverse input message process list, look for SNMP_MSG_EMPTY */
+    msg_ps = &msg_input_list[0];
+    req_idx = 0;
+    while ((req_idx<SNMP_CONCURRENT_REQUESTS) && (msg_ps->state != SNMP_MSG_EMPTY))
+    {
+      req_idx++;
+      msg_ps++;
+    }
+    if (req_idx != SNMP_CONCURRENT_REQUESTS)
+    {
+      err_t err_ret;
+      u16_t payload_len;
+      u16_t payload_ofs;
+      u16_t varbind_ofs = 0;
+
+      /* accepting request */
+      snmp_inc_snmpinpkts();
+      /* record used 'protocol control block' */
+      msg_ps->pcb = pcb;
+      /* source address (network order) */
+      msg_ps->sip = *addr;
+      /* source port (host order (lwIP oddity)) */
+      msg_ps->sp = port;
+      /* read UDP payload length from UDP header */
+      payload_len = ntohs(udphdr->len) - UDP_HLEN;
+
+      /* adjust to UDP payload */
+      payload_ofs = UDP_HLEN;
+
+      /* check total length, version, community, pdu type */
+      err_ret = snmp_pdu_header_check(p, payload_ofs, payload_len, &varbind_ofs, msg_ps);
+      if (((msg_ps->rt == SNMP_ASN1_PDU_GET_REQ) ||
+           (msg_ps->rt == SNMP_ASN1_PDU_GET_NEXT_REQ) ||
+           (msg_ps->rt == SNMP_ASN1_PDU_SET_REQ)) &&
+          ((msg_ps->error_status == SNMP_ES_NOERROR) &&
+           (msg_ps->error_index == 0)) )
+      {
+        /* Only accept requests and requests without error (be robust) */
+        err_ret = err_ret;
+      }
+      else
+      {
+        /* Reject response and trap headers or error requests as input! */
+        err_ret = ERR_ARG;
+      }
+      if (err_ret == ERR_OK)
+      {
+        LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv ok, community %s\n", msg_ps->community));
+
+        /* Builds a list of variable bindings. Copy the varbinds from the pbuf
+          chain to glue them when these are divided over two or more pbuf's. */
+        err_ret = snmp_pdu_dec_varbindlist(p, varbind_ofs, &varbind_ofs, msg_ps);
+        if ((err_ret == ERR_OK) && (msg_ps->invb.count > 0))
+        {
+          /* we've decoded the incoming message, release input msg now */
+          pbuf_free(p);
+
+          msg_ps->error_status = SNMP_ES_NOERROR;
+          msg_ps->error_index = 0;
+          /* find object for each variable binding */
+          msg_ps->state = SNMP_MSG_SEARCH_OBJ;
+          /* first variable binding from list to inspect */
+          msg_ps->vb_idx = 0;
+
+          LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_recv varbind cnt=%"U16_F"\n",(u16_t)msg_ps->invb.count));
+
+          /* handle input event and as much objects as possible in one go */
+          snmp_msg_event(req_idx);
+        }
+        else
+        {
+          /* varbind-list decode failed, or varbind list empty.
+             drop request silently, do not return error!
+             (errors are only returned for a specific varbind failure) */
+          pbuf_free(p);
+          LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_pdu_dec_varbindlist() failed\n"));
+        }
+      }
+      else
+      {
+        /* header check failed
+           drop request silently, do not return error! */
+        pbuf_free(p);
+        LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_pdu_header_check() failed\n"));
+      }
+    }
+    else
+    {
+      /* exceeding number of concurrent requests */
+      pbuf_free(p);
+    }
+  }
+  else
+  {
+    /* datagram not for us */
+    pbuf_free(p);
+  }
+}
+
+/**
+ * Checks and decodes incoming SNMP message header, logs header errors.
+ *
+ * @param p points to pbuf chain of SNMP message (UDP payload)
+ * @param ofs points to first octet of SNMP message
+ * @param pdu_len the length of the UDP payload
+ * @param ofs_ret returns the ofset of the variable bindings
+ * @param m_stat points to the current message request state return
+ * @return
+ * - ERR_OK SNMP header is sane and accepted
+ * - ERR_ARG SNMP header is either malformed or rejected
+ */
+static err_t
+snmp_pdu_header_check(struct pbuf *p, u16_t ofs, u16_t pdu_len, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat)
+{
+  err_t derr;
+  u16_t len, ofs_base;
+  u8_t  len_octets;
+  u8_t  type;
+  s32_t version;
+
+  ofs_base = ofs;
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+  if ((derr != ERR_OK) ||
+      (pdu_len != (1 + len_octets + len)) ||
+      (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)))
+  {
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  ofs += (1 + len_octets);
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+  if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
+  {
+    /* can't decode or no integer (version) */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &version);
+  if (derr != ERR_OK)
+  {
+    /* can't decode */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  if (version != 0)
+  {
+    /* not version 1 */
+    snmp_inc_snmpinbadversions();
+    return ERR_ARG;
+  }
+  ofs += (1 + len_octets + len);
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+  if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR)))
+  {
+    /* can't decode or no octet string (community) */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, SNMP_COMMUNITY_STR_LEN, m_stat->community);
+  if (derr != ERR_OK)
+  {
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  /* add zero terminator */
+  len = ((len < (SNMP_COMMUNITY_STR_LEN))?(len):(SNMP_COMMUNITY_STR_LEN));
+  m_stat->community[len] = 0;
+  m_stat->com_strlen = len;
+  if (strncmp(snmp_publiccommunity, (const char*)m_stat->community, SNMP_COMMUNITY_STR_LEN) != 0)
+  {
+    /** @todo: move this if we need to check more names */
+    snmp_inc_snmpinbadcommunitynames();
+    snmp_authfail_trap();
+    return ERR_ARG;
+  }
+  ofs += (1 + len_octets + len);
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+  if (derr != ERR_OK)
+  {
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  switch(type)
+  {
+    case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_REQ):
+      /* GetRequest PDU */
+      snmp_inc_snmpingetrequests();
+      derr = ERR_OK;
+      break;
+    case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_NEXT_REQ):
+      /* GetNextRequest PDU */
+      snmp_inc_snmpingetnexts();
+      derr = ERR_OK;
+      break;
+    case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP):
+      /* GetResponse PDU */
+      snmp_inc_snmpingetresponses();
+      derr = ERR_ARG;
+      break;
+    case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_SET_REQ):
+      /* SetRequest PDU */
+      snmp_inc_snmpinsetrequests();
+      derr = ERR_OK;
+      break;
+    case (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP):
+      /* Trap PDU */
+      snmp_inc_snmpintraps();
+      derr = ERR_ARG;
+      break;
+    default:
+      snmp_inc_snmpinasnparseerrs();
+      derr = ERR_ARG;
+      break;
+  }
+  if (derr != ERR_OK)
+  {
+    /* unsupported input PDU for this agent (no parse error) */
+    return ERR_ARG;
+  }
+  m_stat->rt = type & 0x1F;
+  ofs += (1 + len_octets);
+  if (len != (pdu_len - (ofs - ofs_base)))
+  {
+    /* decoded PDU length does not equal actual payload length */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+  if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
+  {
+    /* can't decode or no integer (request ID) */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->rid);
+  if (derr != ERR_OK)
+  {
+    /* can't decode */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  ofs += (1 + len_octets + len);
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+  if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
+  {
+    /* can't decode or no integer (error-status) */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  /* must be noError (0) for incoming requests.
+     log errors for mib-2 completeness and for debug purposes */
+  derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->error_status);
+  if (derr != ERR_OK)
+  {
+    /* can't decode */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  switch (m_stat->error_status)
+  {
+    case SNMP_ES_TOOBIG:
+      snmp_inc_snmpintoobigs();
+      break;
+    case SNMP_ES_NOSUCHNAME:
+      snmp_inc_snmpinnosuchnames();
+      break;
+    case SNMP_ES_BADVALUE:
+      snmp_inc_snmpinbadvalues();
+      break;
+    case SNMP_ES_READONLY:
+      snmp_inc_snmpinreadonlys();
+      break;
+    case SNMP_ES_GENERROR:
+      snmp_inc_snmpingenerrs();
+      break;
+  }
+  ofs += (1 + len_octets + len);
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+  if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG)))
+  {
+    /* can't decode or no integer (error-index) */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  /* must be 0 for incoming requests.
+     decode anyway to catch bad integers (and dirty tricks) */
+  derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, &m_stat->error_index);
+  if (derr != ERR_OK)
+  {
+    /* can't decode */
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  ofs += (1 + len_octets + len);
+  *ofs_ret = ofs;
+  return ERR_OK;
+}
+
+static err_t
+snmp_pdu_dec_varbindlist(struct pbuf *p, u16_t ofs, u16_t *ofs_ret, struct snmp_msg_pstat *m_stat)
+{
+  err_t derr;
+  u16_t len, vb_len;
+  u8_t  len_octets;
+  u8_t type;
+
+  /* variable binding list */
+  snmp_asn1_dec_type(p, ofs, &type);
+  derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &vb_len);
+  if ((derr != ERR_OK) ||
+      (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)))
+  {
+    snmp_inc_snmpinasnparseerrs();
+    return ERR_ARG;
+  }
+  ofs += (1 + len_octets);
+
+  /* start with empty list */
+  m_stat->invb.count = 0;
+  m_stat->invb.head = NULL;
+  m_stat->invb.tail = NULL;
+
+  while (vb_len > 0)
+  {
+    struct snmp_obj_id oid, oid_value;
+    struct snmp_varbind *vb;
+
+    snmp_asn1_dec_type(p, ofs, &type);
+    derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+    if ((derr != ERR_OK) ||
+        (type != (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ)) ||
+        (len == 0) || (len > vb_len))
+    {
+      snmp_inc_snmpinasnparseerrs();
+      /* free varbinds (if available) */
+      snmp_varbind_list_free(&m_stat->invb);
+      return ERR_ARG;
+    }
+    ofs += (1 + len_octets);
+    vb_len -= (1 + len_octets);
+
+    snmp_asn1_dec_type(p, ofs, &type);
+    derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+    if ((derr != ERR_OK) || (type != (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID)))
+    {
+      /* can't decode object name length */
+      snmp_inc_snmpinasnparseerrs();
+      /* free varbinds (if available) */
+      snmp_varbind_list_free(&m_stat->invb);
+      return ERR_ARG;
+    }
+    derr = snmp_asn1_dec_oid(p, ofs + 1 + len_octets, len, &oid);
+    if (derr != ERR_OK)
+    {
+      /* can't decode object name */
+      snmp_inc_snmpinasnparseerrs();
+      /* free varbinds (if available) */
+      snmp_varbind_list_free(&m_stat->invb);
+      return ERR_ARG;
+    }
+    ofs += (1 + len_octets + len);
+    vb_len -= (1 + len_octets + len);
+
+    snmp_asn1_dec_type(p, ofs, &type);
+    derr = snmp_asn1_dec_length(p, ofs+1, &len_octets, &len);
+    if (derr != ERR_OK)
+    {
+      /* can't decode object value length */
+      snmp_inc_snmpinasnparseerrs();
+      /* free varbinds (if available) */
+      snmp_varbind_list_free(&m_stat->invb);
+      return ERR_ARG;
+    }
+
+    switch (type)
+    {
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
+        vb = snmp_varbind_alloc(&oid, type, sizeof(s32_t));
+        if (vb != NULL)
+        {
+          s32_t *vptr = vb->value;
+
+          derr = snmp_asn1_dec_s32t(p, ofs + 1 + len_octets, len, vptr);
+          snmp_varbind_tail_add(&m_stat->invb, vb);
+        }
+        else
+        {
+          derr = ERR_ARG;
+        }
+        break;
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
+        vb = snmp_varbind_alloc(&oid, type, sizeof(u32_t));
+        if (vb != NULL)
+        {
+          u32_t *vptr = vb->value;
+
+          derr = snmp_asn1_dec_u32t(p, ofs + 1 + len_octets, len, vptr);
+          snmp_varbind_tail_add(&m_stat->invb, vb);
+        }
+        else
+        {
+          derr = ERR_ARG;
+        }
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
+        vb = snmp_varbind_alloc(&oid, type, len);
+        if (vb != NULL)
+        {
+          derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, vb->value_len, vb->value);
+          snmp_varbind_tail_add(&m_stat->invb, vb);
+        }
+        else
+        {
+          derr = ERR_ARG;
+        }
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
+        vb = snmp_varbind_alloc(&oid, type, 0);
+        if (vb != NULL)
+        {
+          snmp_varbind_tail_add(&m_stat->invb, vb);
+          derr = ERR_OK;
+        }
+        else
+        {
+          derr = ERR_ARG;
+        }
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
+        derr = snmp_asn1_dec_oid(p, ofs + 1 + len_octets, len, &oid_value);
+        if (derr == ERR_OK)
+        {
+          vb = snmp_varbind_alloc(&oid, type, oid_value.len * sizeof(s32_t));
+          if (vb != NULL)
+          {
+            u8_t i = oid_value.len;
+            s32_t *vptr = vb->value;
+
+            while(i > 0)
+            {
+              i--;
+              vptr[i] = oid_value.id[i];
+            }
+            snmp_varbind_tail_add(&m_stat->invb, vb);
+            derr = ERR_OK;
+          }
+          else
+          {
+            derr = ERR_ARG;
+          }
+        }
+        break;
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
+        if (len == 4)
+        {
+          /* must be exactly 4 octets! */
+          vb = snmp_varbind_alloc(&oid, type, 4);
+          if (vb != NULL)
+          {
+            derr = snmp_asn1_dec_raw(p, ofs + 1 + len_octets, len, vb->value_len, vb->value);
+            snmp_varbind_tail_add(&m_stat->invb, vb);
+          }
+          else
+          {
+            derr = ERR_ARG;
+          }
+        }
+        else
+        {
+          derr = ERR_ARG;
+        }
+        break;
+      default:
+        derr = ERR_ARG;
+        break;
+    }
+    if (derr != ERR_OK)
+    {
+      snmp_inc_snmpinasnparseerrs();
+      /* free varbinds (if available) */
+      snmp_varbind_list_free(&m_stat->invb);
+      return ERR_ARG;
+    }
+    ofs += (1 + len_octets + len);
+    vb_len -= (1 + len_octets + len);
+  }
+
+  if (m_stat->rt == SNMP_ASN1_PDU_SET_REQ)
+  {
+    snmp_add_snmpintotalsetvars(m_stat->invb.count);
+  }
+  else
+  {
+    snmp_add_snmpintotalreqvars(m_stat->invb.count);
+  }
+
+  *ofs_ret = ofs;
+  return ERR_OK;
+}
+
+struct snmp_varbind*
+snmp_varbind_alloc(struct snmp_obj_id *oid, u8_t type, u8_t len)
+{
+  struct snmp_varbind *vb;
+
+  vb = (struct snmp_varbind *)mem_malloc(sizeof(struct snmp_varbind));
+  LWIP_ASSERT("vb != NULL",vb != NULL);
+  if (vb != NULL)
+  {
+    u8_t i;
+
+    vb->next = NULL;
+    vb->prev = NULL;
+    i = oid->len;
+    vb->ident_len = i;
+    if (i > 0)
+    {
+      /* allocate array of s32_t for our object identifier */
+      vb->ident = (s32_t*)mem_malloc(sizeof(s32_t) * i);
+      LWIP_ASSERT("vb->ident != NULL",vb->ident != NULL);
+      if (vb->ident == NULL)
+      {
+        mem_free(vb);
+        return NULL;
+      }
+      while(i > 0)
+      {
+        i--;
+        vb->ident[i] = oid->id[i];
+      }
+    }
+    else
+    {
+      /* i == 0, pass zero length object identifier */
+      vb->ident = NULL;
+    }
+    vb->value_type = type;
+    vb->value_len = len;
+    if (len > 0)
+    {
+      /* allocate raw bytes for our object value */
+      vb->value = mem_malloc(len);
+      LWIP_ASSERT("vb->value != NULL",vb->value != NULL);
+      if (vb->value == NULL)
+      {
+        if (vb->ident != NULL)
+        {
+          mem_free(vb->ident);
+        }
+        mem_free(vb);
+        return NULL;
+      }
+    }
+    else
+    {
+      /* ASN1_NUL type, or zero length ASN1_OC_STR */
+      vb->value = NULL;
+    }
+  }
+  return vb;
+}
+
+void
+snmp_varbind_free(struct snmp_varbind *vb)
+{
+  if (vb->value != NULL )
+  {
+    mem_free(vb->value);
+  }
+  if (vb->ident != NULL )
+  {
+    mem_free(vb->ident);
+  }
+  mem_free(vb);
+}
+
+void
+snmp_varbind_list_free(struct snmp_varbind_root *root)
+{
+  struct snmp_varbind *vb, *prev;
+
+  vb = root->tail;
+  while ( vb != NULL )
+  {
+    prev = vb->prev;
+    snmp_varbind_free(vb);
+    vb = prev;
+  }
+  root->count = 0;
+  root->head = NULL;
+  root->tail = NULL;
+}
+
+void
+snmp_varbind_tail_add(struct snmp_varbind_root *root, struct snmp_varbind *vb)
+{
+  if (root->count == 0)
+  {
+    /* add first varbind to list */
+    root->head = vb;
+    root->tail = vb;
+  }
+  else
+  {
+    /* add nth varbind to list tail */
+    root->tail->next = vb;
+    vb->prev = root->tail;
+    root->tail = vb;
+  }
+  root->count += 1;
+}
+
+struct snmp_varbind*
+snmp_varbind_tail_remove(struct snmp_varbind_root *root)
+{
+  struct snmp_varbind* vb;
+
+  if (root->count > 0)
+  {
+    /* remove tail varbind */
+    vb = root->tail;
+    root->tail = vb->prev;
+    vb->prev->next = NULL;
+    root->count -= 1;
+  }
+  else
+  {
+    /* nothing to remove */
+    vb = NULL;
+  }
+  return vb;
+}
+
+#endif /* LWIP_SNMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/msg_out.c b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/msg_out.c
new file mode 100644
index 000000000..b705aaca7
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/snmp/msg_out.c
@@ -0,0 +1,683 @@
+/**
+ * @file
+ * SNMP output message processing (RFC1157).
+ *
+ * Output responses and traps are build in two passes:
+ *
+ * Pass 0: iterate over the output message backwards to determine encoding lengths
+ * Pass 1: the actual forward encoding of internal form into ASN1
+ *
+ * The single-pass encoding method described by Comer & Stevens
+ * requires extra buffer space and copying for reversal of the packet.
+ * The buffer requirement can be prohibitively large for big payloads
+ * (>= 484) therefore we use the two encoding passes.
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/udp.h"
+#include "lwip/netif.h"
+#include "lwip/snmp.h"
+#include "lwip/snmp_asn1.h"
+#include "lwip/snmp_msg.h"
+
+struct snmp_trap_dst
+{
+  /* destination IP address in network order */
+  struct ip_addr dip;
+  /* set to 0 when disabled, >0 when enabled */
+  u8_t enable;
+};
+struct snmp_trap_dst trap_dst[SNMP_TRAP_DESTINATIONS];
+
+/** TRAP message structure */
+struct snmp_msg_trap trap_msg;
+
+static u16_t snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len);
+static u16_t snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len);
+static u16_t snmp_varbind_list_sum(struct snmp_varbind_root *root);
+
+static u16_t snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p);
+static u16_t snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p);
+static u16_t snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs);
+
+/**
+ * Sets enable switch for this trap destination.
+ * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1
+ * @param enable switch if 0 destination is disabled >0 enabled.
+ */
+void
+snmp_trap_dst_enable(u8_t dst_idx, u8_t enable)
+{
+  if (dst_idx < SNMP_TRAP_DESTINATIONS)
+  {
+    trap_dst[dst_idx].enable = enable;
+  }
+}
+
+/**
+ * Sets IPv4 address for this trap destination.
+ * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1
+ * @param dst IPv4 address in host order.
+ */
+void
+snmp_trap_dst_ip_set(u8_t dst_idx, struct ip_addr *dst)
+{
+  if (dst_idx < SNMP_TRAP_DESTINATIONS)
+  {
+    trap_dst[dst_idx].dip.addr = htonl(dst->addr);
+  }
+}
+
+/**
+ * Sends a 'getresponse' message to the request originator.
+ *
+ * @param m_stat points to the current message request state source
+ * @return ERR_OK when success, ERR_MEM if we're out of memory
+ *
+ * @note the caller is responsible for filling in outvb in the m_stat
+ * and provide error-status and index (except for tooBig errors) ...
+ */
+err_t
+snmp_send_response(struct snmp_msg_pstat *m_stat)
+{
+  struct snmp_varbind_root emptyvb = {NULL, NULL, 0, 0, 0};
+  struct pbuf *p;
+  u16_t tot_len;
+  err_t err;
+
+  /* pass 0, calculate length fields */
+  tot_len = snmp_varbind_list_sum(&m_stat->outvb);
+  tot_len = snmp_resp_header_sum(m_stat, tot_len);
+
+  /* try allocating pbuf(s) for complete response */
+  p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
+  if (p == NULL)
+  {
+    LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() tooBig\n"));
+
+    /* can't construct reply, return error-status tooBig */
+    m_stat->error_status = SNMP_ES_TOOBIG;
+    m_stat->error_index = 0;
+    /* pass 0, recalculate lengths, for empty varbind-list */
+    tot_len = snmp_varbind_list_sum(&emptyvb);
+    tot_len = snmp_resp_header_sum(m_stat, tot_len);
+    /* retry allocation once for header and empty varbind-list */
+    p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
+  }
+  if (p != NULL)
+  {
+    /* first pbuf alloc try or retry alloc success */
+    u16_t ofs;
+
+    LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() p != NULL\n"));
+
+    /* pass 1, size error, encode packet ino the pbuf(s) */
+    ofs = snmp_resp_header_enc(m_stat, p);
+    if (m_stat->error_status == SNMP_ES_TOOBIG)
+    {
+      snmp_varbind_list_enc(&emptyvb, p, ofs);
+    }
+    else
+    {
+      snmp_varbind_list_enc(&m_stat->outvb, p, ofs);
+    }
+
+    switch (m_stat->error_status)
+    {
+      case SNMP_ES_TOOBIG:
+        snmp_inc_snmpouttoobigs();
+        break;
+      case SNMP_ES_NOSUCHNAME:
+        snmp_inc_snmpoutnosuchnames();
+        break;
+      case SNMP_ES_BADVALUE:
+        snmp_inc_snmpoutbadvalues();
+        break;
+      case SNMP_ES_GENERROR:
+        snmp_inc_snmpoutgenerrs();
+        break;
+    }
+    snmp_inc_snmpoutgetresponses();
+    snmp_inc_snmpoutpkts();
+
+    /** @todo do we need separate rx and tx pcbs for threaded case? */
+    /** connect to the originating source */
+    udp_connect(m_stat->pcb, &m_stat->sip, m_stat->sp);
+    err = udp_send(m_stat->pcb, p);
+    if (err == ERR_MEM)
+    {
+      /** @todo release some memory, retry and return tooBig? tooMuchHassle? */
+      err = ERR_MEM;
+    }
+    else
+    {
+      err = ERR_OK;
+    }
+    /** disassociate remote address and port with this pcb */
+    udp_disconnect(m_stat->pcb);
+
+    pbuf_free(p);
+    LWIP_DEBUGF(SNMP_MSG_DEBUG, ("snmp_snd_response() done\n"));
+    return err;
+  }
+  else
+  {
+    /* first pbuf alloc try or retry alloc failed
+       very low on memory, couldn't return tooBig */
+    return ERR_MEM;
+  }
+}
+
+
+/**
+ * Sends an generic or enterprise specific trap message.
+ *
+ * @param generic_trap is the trap code
+ * @param eoid points to enterprise object identifier
+ * @param specific_trap used for enterprise traps when generic_trap == 6
+ * @return ERR_OK when success, ERR_MEM if we're out of memory
+ *
+ * @note the caller is responsible for filling in outvb in the trap_msg
+ * @note the use of the enterpise identifier field
+ * is per RFC1215.
+ * Use .iso.org.dod.internet.mgmt.mib-2.snmp for generic traps
+ * and .iso.org.dod.internet.private.enterprises.yourenterprise
+ * (sysObjectID) for specific traps.
+ */
+err_t
+snmp_send_trap(s8_t generic_trap, struct snmp_obj_id *eoid, s32_t specific_trap)
+{
+  struct snmp_trap_dst *td;
+  struct netif *dst_if;
+  struct ip_addr dst_ip;
+  struct pbuf *p;
+  u16_t i,tot_len;
+
+  for (i=0, td = &trap_dst[0]; i<SNMP_TRAP_DESTINATIONS; i++, td++)
+  {
+    if ((td->enable != 0) && (td->dip.addr != 0))
+    {
+      /* network order trap destination */
+      trap_msg.dip.addr = td->dip.addr;
+      /* lookup current source address for this dst */
+      dst_if = ip_route(&td->dip);
+      dst_ip.addr = ntohl(dst_if->ip_addr.addr);
+      trap_msg.sip_raw[0] = dst_ip.addr >> 24;
+      trap_msg.sip_raw[1] = dst_ip.addr >> 16;
+      trap_msg.sip_raw[2] = dst_ip.addr >> 8;
+      trap_msg.sip_raw[3] = dst_ip.addr;
+      trap_msg.gen_trap = generic_trap;
+      trap_msg.spc_trap = specific_trap;
+      if (generic_trap == SNMP_GENTRAP_ENTERPRISESPC)
+      {
+        /* enterprise-Specific trap */
+        trap_msg.enterprise = eoid;
+      }
+      else
+      {
+        /* generic (MIB-II) trap */
+        snmp_get_snmpgrpid_ptr(&trap_msg.enterprise);
+      }
+      snmp_get_sysuptime(&trap_msg.ts);
+
+      /* pass 0, calculate length fields */
+      tot_len = snmp_varbind_list_sum(&trap_msg.outvb);
+      tot_len = snmp_trap_header_sum(&trap_msg, tot_len);
+
+      /* allocate pbuf(s) */
+      p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_POOL);
+      if (p != NULL)
+      {
+        u16_t ofs;
+
+        /* pass 1, encode packet ino the pbuf(s) */
+        ofs = snmp_trap_header_enc(&trap_msg, p);
+        snmp_varbind_list_enc(&trap_msg.outvb, p, ofs);
+
+        snmp_inc_snmpouttraps();
+        snmp_inc_snmpoutpkts();
+
+        /** connect to the TRAP destination */
+        udp_connect(trap_msg.pcb, &trap_msg.dip, SNMP_TRAP_PORT);
+        udp_send(trap_msg.pcb, p);
+        /** disassociate remote address and port with this pcb */
+        udp_disconnect(trap_msg.pcb);
+
+        pbuf_free(p);
+      }
+      else
+      {
+        return ERR_MEM;
+      }
+    }
+  }
+  return ERR_OK;
+}
+
+void
+snmp_coldstart_trap(void)
+{
+  trap_msg.outvb.head = NULL;
+  trap_msg.outvb.tail = NULL;
+  trap_msg.outvb.count = 0;
+  snmp_send_trap(SNMP_GENTRAP_COLDSTART, NULL, 0);
+}
+
+void
+snmp_authfail_trap(void)
+{
+  u8_t enable;
+  snmp_get_snmpenableauthentraps(&enable);
+  if (enable == 1)
+  {
+    trap_msg.outvb.head = NULL;
+    trap_msg.outvb.tail = NULL;
+    trap_msg.outvb.count = 0;
+    snmp_send_trap(SNMP_GENTRAP_AUTHFAIL, NULL, 0);
+  }
+}
+
+/**
+ * Sums response header field lengths from tail to head and
+ * returns resp_header_lengths for second encoding pass.
+ *
+ * @param vb_len varbind-list length
+ * @param rhl points to returned header lengths
+ * @return the required lenght for encoding the response header
+ */
+static u16_t
+snmp_resp_header_sum(struct snmp_msg_pstat *m_stat, u16_t vb_len)
+{
+  u16_t tot_len;
+  struct snmp_resp_header_lengths *rhl;
+
+  rhl = &m_stat->rhl;
+  tot_len = vb_len;
+  snmp_asn1_enc_s32t_cnt(m_stat->error_index, &rhl->erridxlen);
+  snmp_asn1_enc_length_cnt(rhl->erridxlen, &rhl->erridxlenlen);
+  tot_len += 1 + rhl->erridxlenlen + rhl->erridxlen;
+
+  snmp_asn1_enc_s32t_cnt(m_stat->error_status, &rhl->errstatlen);
+  snmp_asn1_enc_length_cnt(rhl->errstatlen, &rhl->errstatlenlen);
+  tot_len += 1 + rhl->errstatlenlen + rhl->errstatlen;
+
+  snmp_asn1_enc_s32t_cnt(m_stat->rid, &rhl->ridlen);
+  snmp_asn1_enc_length_cnt(rhl->ridlen, &rhl->ridlenlen);
+  tot_len += 1 + rhl->ridlenlen + rhl->ridlen;
+
+  rhl->pdulen = tot_len;
+  snmp_asn1_enc_length_cnt(rhl->pdulen, &rhl->pdulenlen);
+  tot_len += 1 + rhl->pdulenlen;
+
+  rhl->comlen = m_stat->com_strlen;
+  snmp_asn1_enc_length_cnt(rhl->comlen, &rhl->comlenlen);
+  tot_len += 1 + rhl->comlenlen + rhl->comlen;
+
+  snmp_asn1_enc_s32t_cnt(snmp_version, &rhl->verlen);
+  snmp_asn1_enc_length_cnt(rhl->verlen, &rhl->verlenlen);
+  tot_len += 1 + rhl->verlen + rhl->verlenlen;
+
+  rhl->seqlen = tot_len;
+  snmp_asn1_enc_length_cnt(rhl->seqlen, &rhl->seqlenlen);
+  tot_len += 1 + rhl->seqlenlen;
+
+  return tot_len;
+}
+
+/**
+ * Sums trap header field lengths from tail to head and
+ * returns trap_header_lengths for second encoding pass.
+ *
+ * @param vb_len varbind-list length
+ * @param thl points to returned header lengths
+ * @return the required lenght for encoding the trap header
+ */
+static u16_t
+snmp_trap_header_sum(struct snmp_msg_trap *m_trap, u16_t vb_len)
+{
+  u16_t tot_len;
+  struct snmp_trap_header_lengths *thl;
+
+  thl = &m_trap->thl;
+  tot_len = vb_len;
+
+  snmp_asn1_enc_u32t_cnt(m_trap->ts, &thl->tslen);
+  snmp_asn1_enc_length_cnt(thl->tslen, &thl->tslenlen);
+  tot_len += 1 + thl->tslen + thl->tslenlen;
+
+  snmp_asn1_enc_s32t_cnt(m_trap->spc_trap, &thl->strplen);
+  snmp_asn1_enc_length_cnt(thl->strplen, &thl->strplenlen);
+  tot_len += 1 + thl->strplen + thl->strplenlen;
+
+  snmp_asn1_enc_s32t_cnt(m_trap->gen_trap, &thl->gtrplen);
+  snmp_asn1_enc_length_cnt(thl->gtrplen, &thl->gtrplenlen);
+  tot_len += 1 + thl->gtrplen + thl->gtrplenlen;
+
+  thl->aaddrlen = 4;
+  snmp_asn1_enc_length_cnt(thl->aaddrlen, &thl->aaddrlenlen);
+  tot_len += 1 + thl->aaddrlen + thl->aaddrlenlen;
+
+  snmp_asn1_enc_oid_cnt(m_trap->enterprise->len, &m_trap->enterprise->id[0], &thl->eidlen);
+  snmp_asn1_enc_length_cnt(thl->eidlen, &thl->eidlenlen);
+  tot_len += 1 + thl->eidlen + thl->eidlenlen;
+
+  thl->pdulen = tot_len;
+  snmp_asn1_enc_length_cnt(thl->pdulen, &thl->pdulenlen);
+  tot_len += 1 + thl->pdulenlen;
+
+  thl->comlen = sizeof(snmp_publiccommunity) - 1;
+  snmp_asn1_enc_length_cnt(thl->comlen, &thl->comlenlen);
+  tot_len += 1 + thl->comlenlen + thl->comlen;
+
+  snmp_asn1_enc_s32t_cnt(snmp_version, &thl->verlen);
+  snmp_asn1_enc_length_cnt(thl->verlen, &thl->verlenlen);
+  tot_len += 1 + thl->verlen + thl->verlenlen;
+
+  thl->seqlen = tot_len;
+  snmp_asn1_enc_length_cnt(thl->seqlen, &thl->seqlenlen);
+  tot_len += 1 + thl->seqlenlen;
+
+  return tot_len;
+}
+
+/**
+ * Sums varbind lengths from tail to head and
+ * annotates lengths in varbind for second encoding pass.
+ *
+ * @param root points to the root of the variable binding list
+ * @return the required lenght for encoding the variable bindings
+ */
+static u16_t
+snmp_varbind_list_sum(struct snmp_varbind_root *root)
+{
+  struct snmp_varbind *vb;
+  u32_t *uint_ptr;
+  s32_t *sint_ptr;
+  u16_t tot_len;
+
+  tot_len = 0;
+  vb = root->tail;
+  while ( vb != NULL )
+  {
+    /* encoded value lenght depends on type */
+    switch (vb->value_type)
+    {
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
+        sint_ptr = vb->value;
+        snmp_asn1_enc_s32t_cnt(*sint_ptr, &vb->vlen);
+        break;
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
+        uint_ptr = vb->value;
+        snmp_asn1_enc_u32t_cnt(*uint_ptr, &vb->vlen);
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
+        vb->vlen = vb->value_len;
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
+        sint_ptr = vb->value;
+        snmp_asn1_enc_oid_cnt(vb->value_len / sizeof(s32_t), sint_ptr, &vb->vlen);
+        break;
+      default:
+        /* unsupported type */
+        vb->vlen = 0;
+        break;
+    };
+    /* encoding length of value length field */
+    snmp_asn1_enc_length_cnt(vb->vlen, &vb->vlenlen);
+    snmp_asn1_enc_oid_cnt(vb->ident_len, vb->ident, &vb->olen);
+    snmp_asn1_enc_length_cnt(vb->olen, &vb->olenlen);
+
+    vb->seqlen = 1 + vb->vlenlen + vb->vlen;
+    vb->seqlen += 1 + vb->olenlen + vb->olen;
+    snmp_asn1_enc_length_cnt(vb->seqlen, &vb->seqlenlen);
+
+    /* varbind seq */
+    tot_len += 1 + vb->seqlenlen + vb->seqlen;
+
+    vb = vb->prev;
+  }
+
+  /* varbind-list seq */
+  root->seqlen = tot_len;
+  snmp_asn1_enc_length_cnt(root->seqlen, &root->seqlenlen);
+  tot_len += 1 + root->seqlenlen;
+
+  return tot_len;
+}
+
+/**
+ * Encodes response header from head to tail.
+ */
+static u16_t
+snmp_resp_header_enc(struct snmp_msg_pstat *m_stat, struct pbuf *p)
+{
+  u16_t ofs;
+
+  ofs = 0;
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_stat->rhl.seqlen);
+  ofs += m_stat->rhl.seqlenlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_stat->rhl.verlen);
+  ofs += m_stat->rhl.verlenlen;
+  snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.verlen, snmp_version);
+  ofs += m_stat->rhl.verlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_stat->rhl.comlen);
+  ofs += m_stat->rhl.comlenlen;
+  snmp_asn1_enc_raw(p, ofs, m_stat->rhl.comlen, m_stat->community);
+  ofs += m_stat->rhl.comlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_GET_RESP));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_stat->rhl.pdulen);
+  ofs += m_stat->rhl.pdulenlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_stat->rhl.ridlen);
+  ofs += m_stat->rhl.ridlenlen;
+  snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.ridlen, m_stat->rid);
+  ofs += m_stat->rhl.ridlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_stat->rhl.errstatlen);
+  ofs += m_stat->rhl.errstatlenlen;
+  snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.errstatlen, m_stat->error_status);
+  ofs += m_stat->rhl.errstatlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_stat->rhl.erridxlen);
+  ofs += m_stat->rhl.erridxlenlen;
+  snmp_asn1_enc_s32t(p, ofs, m_stat->rhl.erridxlen, m_stat->error_index);
+  ofs += m_stat->rhl.erridxlen;
+
+  return ofs;
+}
+
+/**
+ * Encodes trap header from head to tail.
+ */
+static u16_t
+snmp_trap_header_enc(struct snmp_msg_trap *m_trap, struct pbuf *p)
+{
+  u16_t ofs;
+
+  ofs = 0;
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.seqlen);
+  ofs += m_trap->thl.seqlenlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.verlen);
+  ofs += m_trap->thl.verlenlen;
+  snmp_asn1_enc_s32t(p, ofs, m_trap->thl.verlen, snmp_version);
+  ofs += m_trap->thl.verlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.comlen);
+  ofs += m_trap->thl.comlenlen;
+  snmp_asn1_enc_raw(p, ofs, m_trap->thl.comlen, (u8_t *)&snmp_publiccommunity[0]);
+  ofs += m_trap->thl.comlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_CONTXT | SNMP_ASN1_CONSTR | SNMP_ASN1_PDU_TRAP));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.pdulen);
+  ofs += m_trap->thl.pdulenlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.eidlen);
+  ofs += m_trap->thl.eidlenlen;
+  snmp_asn1_enc_oid(p, ofs, m_trap->enterprise->len, &m_trap->enterprise->id[0]);
+  ofs += m_trap->thl.eidlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.aaddrlen);
+  ofs += m_trap->thl.aaddrlenlen;
+  snmp_asn1_enc_raw(p, ofs, m_trap->thl.aaddrlen, &m_trap->sip_raw[0]);
+  ofs += m_trap->thl.aaddrlen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.gtrplen);
+  ofs += m_trap->thl.gtrplenlen;
+  snmp_asn1_enc_u32t(p, ofs, m_trap->thl.gtrplen, m_trap->gen_trap);
+  ofs += m_trap->thl.gtrplen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.strplen);
+  ofs += m_trap->thl.strplenlen;
+  snmp_asn1_enc_u32t(p, ofs, m_trap->thl.strplen, m_trap->spc_trap);
+  ofs += m_trap->thl.strplen;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, m_trap->thl.tslen);
+  ofs += m_trap->thl.tslenlen;
+  snmp_asn1_enc_u32t(p, ofs, m_trap->thl.tslen, m_trap->ts);
+  ofs += m_trap->thl.tslen;
+
+  return ofs;
+}
+
+/**
+ * Encodes varbind list from head to tail.
+ */
+static u16_t
+snmp_varbind_list_enc(struct snmp_varbind_root *root, struct pbuf *p, u16_t ofs)
+{
+  struct snmp_varbind *vb;
+  s32_t *sint_ptr;
+  u32_t *uint_ptr;
+  u8_t *raw_ptr;
+
+  snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
+  ofs += 1;
+  snmp_asn1_enc_length(p, ofs, root->seqlen);
+  ofs += root->seqlenlen;
+
+  vb = root->head;
+  while ( vb != NULL )
+  {
+    snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_CONSTR | SNMP_ASN1_SEQ));
+    ofs += 1;
+    snmp_asn1_enc_length(p, ofs, vb->seqlen);
+    ofs += vb->seqlenlen;
+
+    snmp_asn1_enc_type(p, ofs, (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID));
+    ofs += 1;
+    snmp_asn1_enc_length(p, ofs, vb->olen);
+    ofs += vb->olenlen;
+    snmp_asn1_enc_oid(p, ofs, vb->ident_len, &vb->ident[0]);
+    ofs += vb->olen;
+
+    snmp_asn1_enc_type(p, ofs, vb->value_type);
+    ofs += 1;
+    snmp_asn1_enc_length(p, ofs, vb->vlen);
+    ofs += vb->vlenlen;
+
+    switch (vb->value_type)
+    {
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_INTEG):
+        sint_ptr = vb->value;
+        snmp_asn1_enc_s32t(p, ofs, vb->vlen, *sint_ptr);
+        break;
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_COUNTER):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_GAUGE):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_TIMETICKS):
+        uint_ptr = vb->value;
+        snmp_asn1_enc_u32t(p, ofs, vb->vlen, *uint_ptr);
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OC_STR):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_IPADDR):
+      case (SNMP_ASN1_APPLIC | SNMP_ASN1_PRIMIT | SNMP_ASN1_OPAQUE):
+        raw_ptr = vb->value;
+        snmp_asn1_enc_raw(p, ofs, vb->vlen, raw_ptr);
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_NUL):
+        break;
+      case (SNMP_ASN1_UNIV | SNMP_ASN1_PRIMIT | SNMP_ASN1_OBJ_ID):
+        sint_ptr = vb->value;
+        snmp_asn1_enc_oid(p, ofs, vb->value_len / sizeof(s32_t), sint_ptr);
+        break;
+      default:
+        /* unsupported type */
+        break;
+    };
+    ofs += vb->vlen;
+    vb = vb->next;
+  }
+  return ofs;
+}
+
+#endif /* LWIP_SNMP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/stats.c b/firmware/x300/lwip/lwip-1.3.1/src/core/stats.c
new file mode 100644
index 000000000..a036d83bb
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/stats.c
@@ -0,0 +1,149 @@
+/**
+ * @file
+ * Statistics module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_STATS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/def.h"
+#include "lwip/stats.h"
+#include "lwip/mem.h"
+
+#include <string.h>
+
+struct stats_ lwip_stats;
+
+#if LWIP_STATS_DISPLAY
+void
+stats_display_proto(struct stats_proto *proto, char *name)
+{
+  LWIP_PLATFORM_DIAG(("\n%s\n\t", name));
+  LWIP_PLATFORM_DIAG(("xmit: %"STAT_COUNTER_F"\n\t", proto->xmit)); 
+  LWIP_PLATFORM_DIAG(("recv: %"STAT_COUNTER_F"\n\t", proto->recv)); 
+  LWIP_PLATFORM_DIAG(("fw: %"STAT_COUNTER_F"\n\t", proto->fw)); 
+  LWIP_PLATFORM_DIAG(("drop: %"STAT_COUNTER_F"\n\t", proto->drop)); 
+  LWIP_PLATFORM_DIAG(("chkerr: %"STAT_COUNTER_F"\n\t", proto->chkerr)); 
+  LWIP_PLATFORM_DIAG(("lenerr: %"STAT_COUNTER_F"\n\t", proto->lenerr)); 
+  LWIP_PLATFORM_DIAG(("memerr: %"STAT_COUNTER_F"\n\t", proto->memerr)); 
+  LWIP_PLATFORM_DIAG(("rterr: %"STAT_COUNTER_F"\n\t", proto->rterr)); 
+  LWIP_PLATFORM_DIAG(("proterr: %"STAT_COUNTER_F"\n\t", proto->proterr)); 
+  LWIP_PLATFORM_DIAG(("opterr: %"STAT_COUNTER_F"\n\t", proto->opterr)); 
+  LWIP_PLATFORM_DIAG(("err: %"STAT_COUNTER_F"\n\t", proto->err)); 
+  LWIP_PLATFORM_DIAG(("cachehit: %"STAT_COUNTER_F"\n", proto->cachehit)); 
+}
+
+#if IGMP_STATS
+void
+stats_display_igmp(struct stats_igmp *igmp)
+{
+  LWIP_PLATFORM_DIAG(("\nIGMP\n\t"));
+  LWIP_PLATFORM_DIAG(("lenerr: %"STAT_COUNTER_F"\n\t", igmp->lenerr)); 
+  LWIP_PLATFORM_DIAG(("chkerr: %"STAT_COUNTER_F"\n\t", igmp->chkerr)); 
+  LWIP_PLATFORM_DIAG(("v1_rxed: %"STAT_COUNTER_F"\n\t", igmp->v1_rxed)); 
+  LWIP_PLATFORM_DIAG(("join_sent: %"STAT_COUNTER_F"\n\t", igmp->join_sent)); 
+  LWIP_PLATFORM_DIAG(("leave_sent: %"STAT_COUNTER_F"\n\t", igmp->leave_sent)); 
+  LWIP_PLATFORM_DIAG(("unicast_query: %"STAT_COUNTER_F"\n\t", igmp->unicast_query)); 
+  LWIP_PLATFORM_DIAG(("report_sent: %"STAT_COUNTER_F"\n\t", igmp->report_sent)); 
+  LWIP_PLATFORM_DIAG(("report_rxed: %"STAT_COUNTER_F"\n\t", igmp->report_rxed)); 
+  LWIP_PLATFORM_DIAG(("group_query_rxed: %"STAT_COUNTER_F"\n", igmp->group_query_rxed));
+}
+#endif /* IGMP_STATS */
+
+#if MEM_STATS || MEMP_STATS
+void
+stats_display_mem(struct stats_mem *mem, char *name)
+{
+  LWIP_PLATFORM_DIAG(("\nMEM %s\n\t", name));
+  LWIP_PLATFORM_DIAG(("avail: %"U32_F"\n\t", (u32_t)mem->avail)); 
+  LWIP_PLATFORM_DIAG(("used: %"U32_F"\n\t", (u32_t)mem->used)); 
+  LWIP_PLATFORM_DIAG(("max: %"U32_F"\n\t", (u32_t)mem->max)); 
+  LWIP_PLATFORM_DIAG(("err: %"U32_F"\n", (u32_t)mem->err));
+}
+
+#if MEMP_STATS
+void
+stats_display_memp(struct stats_mem *mem, int index)
+{
+  char * memp_names[] = {
+#define LWIP_MEMPOOL(name,num,size,desc) desc,
+#include "lwip/memp_std.h"
+  };
+  if(index < MEMP_MAX) {
+    stats_display_mem(mem, memp_names[index]);
+  }
+}
+#endif /* MEMP_STATS */
+#endif /* MEM_STATS || MEMP_STATS */
+
+#if SYS_STATS
+void
+stats_display_sys(struct stats_sys *sys)
+{
+  LWIP_PLATFORM_DIAG(("\nSYS\n\t"));
+  LWIP_PLATFORM_DIAG(("sem.used: %"U32_F"\n\t", (u32_t)sys->sem.used)); 
+  LWIP_PLATFORM_DIAG(("sem.max:  %"U32_F"\n\t", (u32_t)sys->sem.max)); 
+  LWIP_PLATFORM_DIAG(("sem.err:  %"U32_F"\n\t", (u32_t)sys->sem.err)); 
+  LWIP_PLATFORM_DIAG(("mbox.used: %"U32_F"\n\t", (u32_t)sys->mbox.used)); 
+  LWIP_PLATFORM_DIAG(("mbox.max:  %"U32_F"\n\t", (u32_t)sys->mbox.max)); 
+  LWIP_PLATFORM_DIAG(("mbox.err:  %"U32_F"\n\t", (u32_t)sys->mbox.err)); 
+}
+#endif /* SYS_STATS */
+
+void
+stats_display(void)
+{
+  s16_t i;
+
+  LINK_STATS_DISPLAY();
+  ETHARP_STATS_DISPLAY();
+  IPFRAG_STATS_DISPLAY();
+  IP_STATS_DISPLAY();
+  IGMP_STATS_DISPLAY();
+  ICMP_STATS_DISPLAY();
+  UDP_STATS_DISPLAY();
+  TCP_STATS_DISPLAY();
+  MEM_STATS_DISPLAY();
+  for (i = 0; i < MEMP_MAX; i++) {
+    MEMP_STATS_DISPLAY(i);
+  }
+  SYS_STATS_DISPLAY();
+}
+#endif /* LWIP_STATS_DISPLAY */
+
+#endif /* LWIP_STATS */
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/sys.c b/firmware/x300/lwip/lwip-1.3.1/src/core/sys.c
new file mode 100644
index 000000000..d1fbda4e6
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/sys.c
@@ -0,0 +1,344 @@
+/**
+ * @file
+ * lwIP Operating System abstraction
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if (NO_SYS == 0) /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sys.h"
+#include "lwip/def.h"
+#include "lwip/memp.h"
+#include "lwip/tcpip.h"
+
+/**
+ * Struct used for sys_sem_wait_timeout() to tell wether the time
+ * has run out or the semaphore has really become available.
+ */
+struct sswt_cb
+{
+  s16_t timeflag;
+  sys_sem_t *psem;
+};
+
+/**
+ * Wait (forever) for a message to arrive in an mbox.
+ * While waiting, timeouts (for this thread) are processed.
+ *
+ * @param mbox the mbox to fetch the message from
+ * @param msg the place to store the message
+ */
+void
+sys_mbox_fetch(sys_mbox_t mbox, void **msg)
+{
+  u32_t time_needed;
+  struct sys_timeouts *timeouts;
+  struct sys_timeo *tmptimeout;
+  sys_timeout_handler h;
+  void *arg;
+
+ again:
+  timeouts = sys_arch_timeouts();
+
+  if (!timeouts || !timeouts->next) {
+    UNLOCK_TCPIP_CORE();
+    time_needed = sys_arch_mbox_fetch(mbox, msg, 0);
+    LOCK_TCPIP_CORE();
+  } else {
+    if (timeouts->next->time > 0) {
+      UNLOCK_TCPIP_CORE();
+      time_needed = sys_arch_mbox_fetch(mbox, msg, timeouts->next->time);
+      LOCK_TCPIP_CORE();
+    } else {
+      time_needed = SYS_ARCH_TIMEOUT;
+    }
+
+    if (time_needed == SYS_ARCH_TIMEOUT) {
+      /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
+         could be fetched. We should now call the timeout handler and
+         deallocate the memory allocated for the timeout. */
+      tmptimeout = timeouts->next;
+      timeouts->next = tmptimeout->next;
+      h   = tmptimeout->h;
+      arg = tmptimeout->arg;
+      memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
+      if (h != NULL) {
+        LWIP_DEBUGF(SYS_DEBUG, ("smf calling h=%p(%p)\n", (void*)&h, arg));
+        h(arg);
+      }
+
+      /* We try again to fetch a message from the mbox. */
+      goto again;
+    } else {
+      /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout
+         occured. The time variable is set to the number of
+         milliseconds we waited for the message. */
+      if (time_needed < timeouts->next->time) {
+        timeouts->next->time -= time_needed;
+      } else {
+        timeouts->next->time = 0;
+      }
+    }
+  }
+}
+
+/**
+ * Wait (forever) for a semaphore to become available.
+ * While waiting, timeouts (for this thread) are processed.
+ *
+ * @param sem semaphore to wait for
+ */
+void
+sys_sem_wait(sys_sem_t sem)
+{
+  u32_t time_needed;
+  struct sys_timeouts *timeouts;
+  struct sys_timeo *tmptimeout;
+  sys_timeout_handler h;
+  void *arg;
+
+ again:
+
+  timeouts = sys_arch_timeouts();
+
+  if (!timeouts || !timeouts->next) {
+    sys_arch_sem_wait(sem, 0);
+  } else {
+    if (timeouts->next->time > 0) {
+      time_needed = sys_arch_sem_wait(sem, timeouts->next->time);
+    } else {
+      time_needed = SYS_ARCH_TIMEOUT;
+    }
+
+    if (time_needed == SYS_ARCH_TIMEOUT) {
+      /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
+        could be fetched. We should now call the timeout handler and
+        deallocate the memory allocated for the timeout. */
+      tmptimeout = timeouts->next;
+      timeouts->next = tmptimeout->next;
+      h = tmptimeout->h;
+      arg = tmptimeout->arg;
+      memp_free(MEMP_SYS_TIMEOUT, tmptimeout);
+      if (h != NULL) {
+        LWIP_DEBUGF(SYS_DEBUG, ("ssw h=%p(%p)\n", (void*)&h, (void *)arg));
+        h(arg);
+      }
+
+      /* We try again to fetch a message from the mbox. */
+      goto again;
+    } else {
+      /* If time != SYS_ARCH_TIMEOUT, a message was received before the timeout
+         occured. The time variable is set to the number of
+         milliseconds we waited for the message. */
+      if (time_needed < timeouts->next->time) {
+        timeouts->next->time -= time_needed;
+      } else {
+        timeouts->next->time = 0;
+      }
+    }
+  }
+}
+
+/**
+ * Create a one-shot timer (aka timeout). Timeouts are processed in the
+ * following cases:
+ * - while waiting for a message using sys_mbox_fetch()
+ * - while waiting for a semaphore using sys_sem_wait() or sys_sem_wait_timeout()
+ * - while sleeping using the inbuilt sys_msleep()
+ *
+ * @param msecs time in milliseconds after that the timer should expire
+ * @param h callback function to call when msecs have elapsed
+ * @param arg argument to pass to the callback function
+ */
+void
+sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
+{
+  struct sys_timeouts *timeouts;
+  struct sys_timeo *timeout, *t;
+
+  timeout = memp_malloc(MEMP_SYS_TIMEOUT);
+  if (timeout == NULL) {
+    LWIP_ASSERT("sys_timeout: timeout != NULL", timeout != NULL);
+    return;
+  }
+  timeout->next = NULL;
+  timeout->h = h;
+  timeout->arg = arg;
+  timeout->time = msecs;
+
+  timeouts = sys_arch_timeouts();
+
+  LWIP_DEBUGF(SYS_DEBUG, ("sys_timeout: %p msecs=%"U32_F" h=%p arg=%p\n",
+    (void *)timeout, msecs, (void*)&h, (void *)arg));
+
+  if (timeouts == NULL) {
+    LWIP_ASSERT("sys_timeout: timeouts != NULL", timeouts != NULL);
+    return;
+  }
+
+  if (timeouts->next == NULL) {
+    timeouts->next = timeout;
+    return;
+  }
+
+  if (timeouts->next->time > msecs) {
+    timeouts->next->time -= msecs;
+    timeout->next = timeouts->next;
+    timeouts->next = timeout;
+  } else {
+    for(t = timeouts->next; t != NULL; t = t->next) {
+      timeout->time -= t->time;
+      if (t->next == NULL || t->next->time > timeout->time) {
+        if (t->next != NULL) {
+          t->next->time -= timeout->time;
+        }
+        timeout->next = t->next;
+        t->next = timeout;
+        break;
+      }
+    }
+  }
+}
+
+/**
+ * Go through timeout list (for this task only) and remove the first matching
+ * entry, even though the timeout has not triggered yet.
+ *
+ * @note This function only works as expected if there is only one timeout
+ * calling 'h' in the list of timeouts.
+ *
+ * @param h callback function that would be called by the timeout
+ * @param arg callback argument that would be passed to h
+*/
+void
+sys_untimeout(sys_timeout_handler h, void *arg)
+{
+  struct sys_timeouts *timeouts;
+  struct sys_timeo *prev_t, *t;
+
+  timeouts = sys_arch_timeouts();
+
+  if (timeouts == NULL) {
+    LWIP_ASSERT("sys_untimeout: timeouts != NULL", timeouts != NULL);
+    return;
+  }
+  if (timeouts->next == NULL) {
+    return;
+  }
+
+  for (t = timeouts->next, prev_t = NULL; t != NULL; prev_t = t, t = t->next) {
+    if ((t->h == h) && (t->arg == arg)) {
+      /* We have a match */
+      /* Unlink from previous in list */
+      if (prev_t == NULL)
+        timeouts->next = t->next;
+      else
+        prev_t->next = t->next;
+      /* If not the last one, add time of this one back to next */
+      if (t->next != NULL)
+        t->next->time += t->time;
+      memp_free(MEMP_SYS_TIMEOUT, t);
+      return;
+    }
+  }
+  return;
+}
+
+/**
+ * Timeout handler function for sys_sem_wait_timeout()
+ *
+ * @param arg struct sswt_cb* used to signal a semaphore and end waiting.
+ */
+static void
+sswt_handler(void *arg)
+{
+  struct sswt_cb *sswt_cb = (struct sswt_cb *) arg;
+
+  /* Timeout. Set flag to TRUE and signal semaphore */
+  sswt_cb->timeflag = 1;
+  sys_sem_signal(*(sswt_cb->psem));
+}
+
+/**
+ * Wait for a semaphore with timeout (specified in ms)
+ *
+ * @param sem semaphore to wait
+ * @param timeout timeout in ms (0: wait forever)
+ * @return 0 on timeout, 1 otherwise
+ */
+int
+sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout)
+{
+  struct sswt_cb sswt_cb;
+
+  sswt_cb.psem = &sem;
+  sswt_cb.timeflag = 0;
+
+  /* If timeout is zero, then just wait forever */
+  if (timeout > 0) {
+    /* Create a timer and pass it the address of our flag */
+    sys_timeout(timeout, sswt_handler, &sswt_cb);
+  }
+  sys_sem_wait(sem);
+  /* Was it a timeout? */
+  if (sswt_cb.timeflag) {
+    /* timeout */
+    return 0;
+  } else {
+    /* Not a timeout. Remove timeout entry */
+    sys_untimeout(sswt_handler, &sswt_cb);
+    return 1;
+  }
+}
+
+/**
+ * Sleep for some ms. Timeouts are processed while sleeping.
+ *
+ * @param ms number of milliseconds to sleep
+ */
+void
+sys_msleep(u32_t ms)
+{
+  sys_sem_t delaysem = sys_sem_new(0);
+
+  sys_sem_wait_timeout(delaysem, ms);
+
+  sys_sem_free(delaysem);
+}
+
+
+#endif /* NO_SYS */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/tcp.c b/firmware/x300/lwip/lwip-1.3.1/src/core/tcp.c
new file mode 100644
index 000000000..0f3fd41c3
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/tcp.c
@@ -0,0 +1,1458 @@
+/**
+ * @file
+ * Transmission Control Protocol for IP
+ *
+ * This file contains common functions for the TCP implementation, such as functinos
+ * for manipulating the data structures and the TCP timer functions. TCP functions
+ * related to input and output is found in tcp_in.c and tcp_out.c respectively.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/snmp.h"
+#include "lwip/tcp.h"
+#include "lwip/debug.h"
+
+#include <string.h>
+
+/* Incremented every coarse grained timer shot (typically every 500 ms). */
+u32_t tcp_ticks;
+const u8_t tcp_backoff[13] =
+    { 1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7};
+ /* Times per slowtmr hits */
+const u8_t tcp_persist_backoff[7] = { 3, 6, 12, 24, 48, 96, 120 };
+
+/* The TCP PCB lists. */
+
+/** List of all TCP PCBs bound but not yet (connected || listening) */
+struct tcp_pcb *tcp_bound_pcbs;  
+/** List of all TCP PCBs in LISTEN state */
+union tcp_listen_pcbs_t tcp_listen_pcbs;
+/** List of all TCP PCBs that are in a state in which
+ * they accept or send data. */
+struct tcp_pcb *tcp_active_pcbs;  
+/** List of all TCP PCBs in TIME-WAIT state */
+struct tcp_pcb *tcp_tw_pcbs;
+
+struct tcp_pcb *tcp_tmp_pcb;
+
+static u8_t tcp_timer;
+static u16_t tcp_new_port(void);
+
+/**
+ * Called periodically to dispatch TCP timers.
+ *
+ */
+void
+tcp_tmr(void)
+{
+  /* Call tcp_fasttmr() every 250 ms */
+  tcp_fasttmr();
+
+  if (++tcp_timer & 1) {
+    /* Call tcp_tmr() every 500 ms, i.e., every other timer
+       tcp_tmr() is called. */
+    tcp_slowtmr();
+  }
+}
+
+/**
+ * Closes the connection held by the PCB.
+ *
+ * Listening pcbs are freed and may not be referenced any more.
+ * Connection pcbs are freed if not yet connected and may not be referenced
+ * any more. If a connection is established (at least SYN received or in
+ * a closing state), the connection is closed, and put in a closing state.
+ * The pcb is then automatically freed in tcp_slowtmr(). It is therefore
+ * unsafe to reference it.
+ *
+ * @param pcb the tcp_pcb to close
+ * @return ERR_OK if connection has been closed
+ *         another err_t if closing failed and pcb is not freed
+ */
+err_t
+tcp_close(struct tcp_pcb *pcb)
+{
+  err_t err;
+
+#if TCP_DEBUG
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_close: closing in "));
+  tcp_debug_print_state(pcb->state);
+#endif /* TCP_DEBUG */
+
+  switch (pcb->state) {
+  case CLOSED:
+    /* Closing a pcb in the CLOSED state might seem erroneous,
+     * however, it is in this state once allocated and as yet unused
+     * and the user needs some way to free it should the need arise.
+     * Calling tcp_close() with a pcb that has already been closed, (i.e. twice)
+     * or for a pcb that has been used and then entered the CLOSED state 
+     * is erroneous, but this should never happen as the pcb has in those cases
+     * been freed, and so any remaining handles are bogus. */
+    err = ERR_OK;
+    TCP_RMV(&tcp_bound_pcbs, pcb);
+    memp_free(MEMP_TCP_PCB, pcb);
+    pcb = NULL;
+    break;
+  case LISTEN:
+    err = ERR_OK;
+    tcp_pcb_remove((struct tcp_pcb **)&tcp_listen_pcbs.pcbs, pcb);
+    memp_free(MEMP_TCP_PCB_LISTEN, pcb);
+    pcb = NULL;
+    break;
+  case SYN_SENT:
+    err = ERR_OK;
+    tcp_pcb_remove(&tcp_active_pcbs, pcb);
+    memp_free(MEMP_TCP_PCB, pcb);
+    pcb = NULL;
+    snmp_inc_tcpattemptfails();
+    break;
+  case SYN_RCVD:
+    err = tcp_send_ctrl(pcb, TCP_FIN);
+    if (err == ERR_OK) {
+      snmp_inc_tcpattemptfails();
+      pcb->state = FIN_WAIT_1;
+    }
+    break;
+  case ESTABLISHED:
+    err = tcp_send_ctrl(pcb, TCP_FIN);
+    if (err == ERR_OK) {
+      snmp_inc_tcpestabresets();
+      pcb->state = FIN_WAIT_1;
+    }
+    break;
+  case CLOSE_WAIT:
+    err = tcp_send_ctrl(pcb, TCP_FIN);
+    if (err == ERR_OK) {
+      snmp_inc_tcpestabresets();
+      pcb->state = LAST_ACK;
+    }
+    break;
+  default:
+    /* Has already been closed, do nothing. */
+    err = ERR_OK;
+    pcb = NULL;
+    break;
+  }
+
+  if (pcb != NULL && err == ERR_OK) {
+    /* To ensure all data has been sent when tcp_close returns, we have
+       to make sure tcp_output doesn't fail.
+       Since we don't really have to ensure all data has been sent when tcp_close
+       returns (unsent data is sent from tcp timer functions, also), we don't care
+       for the return value of tcp_output for now. */
+    /* @todo: When implementing SO_LINGER, this must be changed somehow:
+       If SOF_LINGER is set, the data should be sent when tcp_close returns. */
+    tcp_output(pcb);
+  }
+  return err;
+}
+
+/**
+ * Abandons a connection and optionally sends a RST to the remote
+ * host.  Deletes the local protocol control block. This is done when
+ * a connection is killed because of shortage of memory.
+ *
+ * @param pcb the tcp_pcb to abort
+ * @param reset boolean to indicate whether a reset should be sent
+ */
+void
+tcp_abandon(struct tcp_pcb *pcb, int reset)
+{
+  u32_t seqno, ackno;
+  u16_t remote_port, local_port;
+  struct ip_addr remote_ip, local_ip;
+#if LWIP_CALLBACK_API  
+  void (* errf)(void *arg, err_t err);
+#endif /* LWIP_CALLBACK_API */
+  void *errf_arg;
+
+  
+  /* Figure out on which TCP PCB list we are, and remove us. If we
+     are in an active state, call the receive function associated with
+     the PCB with a NULL argument, and send an RST to the remote end. */
+  if (pcb->state == TIME_WAIT) {
+    tcp_pcb_remove(&tcp_tw_pcbs, pcb);
+    memp_free(MEMP_TCP_PCB, pcb);
+  } else {
+    seqno = pcb->snd_nxt;
+    ackno = pcb->rcv_nxt;
+    ip_addr_set(&local_ip, &(pcb->local_ip));
+    ip_addr_set(&remote_ip, &(pcb->remote_ip));
+    local_port = pcb->local_port;
+    remote_port = pcb->remote_port;
+#if LWIP_CALLBACK_API
+    errf = pcb->errf;
+#endif /* LWIP_CALLBACK_API */
+    errf_arg = pcb->callback_arg;
+    tcp_pcb_remove(&tcp_active_pcbs, pcb);
+    if (pcb->unacked != NULL) {
+      tcp_segs_free(pcb->unacked);
+    }
+    if (pcb->unsent != NULL) {
+      tcp_segs_free(pcb->unsent);
+    }
+#if TCP_QUEUE_OOSEQ    
+    if (pcb->ooseq != NULL) {
+      tcp_segs_free(pcb->ooseq);
+    }
+#endif /* TCP_QUEUE_OOSEQ */
+    memp_free(MEMP_TCP_PCB, pcb);
+    TCP_EVENT_ERR(errf, errf_arg, ERR_ABRT);
+    if (reset) {
+      LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_abandon: sending RST\n"));
+      tcp_rst(seqno, ackno, &local_ip, &remote_ip, local_port, remote_port);
+    }
+  }
+}
+
+/**
+ * Binds the connection to a local portnumber and IP address. If the
+ * IP address is not given (i.e., ipaddr == NULL), the IP address of
+ * the outgoing network interface is used instead.
+ *
+ * @param pcb the tcp_pcb to bind (no check is done whether this pcb is
+ *        already bound!)
+ * @param ipaddr the local ip address to bind to (use IP_ADDR_ANY to bind
+ *        to any local address
+ * @param port the local port to bind to
+ * @return ERR_USE if the port is already in use
+ *         ERR_OK if bound
+ */
+err_t
+tcp_bind(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
+{
+  struct tcp_pcb *cpcb;
+
+  LWIP_ERROR("tcp_bind: can only bind in state CLOSED", pcb->state == CLOSED, return ERR_ISCONN);
+
+  if (port == 0) {
+    port = tcp_new_port();
+  }
+  /* Check if the address already is in use. */
+  /* Check the listen pcbs. */
+  for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs;
+      cpcb != NULL; cpcb = cpcb->next) {
+    if (cpcb->local_port == port) {
+      if (ip_addr_isany(&(cpcb->local_ip)) ||
+          ip_addr_isany(ipaddr) ||
+          ip_addr_cmp(&(cpcb->local_ip), ipaddr)) {
+        return ERR_USE;
+      }
+    }
+  }
+  /* Check the connected pcbs. */
+  for(cpcb = tcp_active_pcbs;
+      cpcb != NULL; cpcb = cpcb->next) {
+    if (cpcb->local_port == port) {
+      if (ip_addr_isany(&(cpcb->local_ip)) ||
+          ip_addr_isany(ipaddr) ||
+          ip_addr_cmp(&(cpcb->local_ip), ipaddr)) {
+        return ERR_USE;
+      }
+    }
+  }
+  /* Check the bound, not yet connected pcbs. */
+  for(cpcb = tcp_bound_pcbs; cpcb != NULL; cpcb = cpcb->next) {
+    if (cpcb->local_port == port) {
+      if (ip_addr_isany(&(cpcb->local_ip)) ||
+          ip_addr_isany(ipaddr) ||
+          ip_addr_cmp(&(cpcb->local_ip), ipaddr)) {
+        return ERR_USE;
+      }
+    }
+  }
+  /* @todo: until SO_REUSEADDR is implemented (see task #6995 on savannah),
+   * we have to check the pcbs in TIME-WAIT state, also: */
+  for(cpcb = tcp_tw_pcbs; cpcb != NULL; cpcb = cpcb->next) {
+    if (cpcb->local_port == port) {
+      if (ip_addr_cmp(&(cpcb->local_ip), ipaddr)) {
+        return ERR_USE;
+      }
+    }
+  }
+
+  if (!ip_addr_isany(ipaddr)) {
+    pcb->local_ip = *ipaddr;
+  }
+  pcb->local_port = port;
+  TCP_REG(&tcp_bound_pcbs, pcb);
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_bind: bind to port %"U16_F"\n", port));
+  return ERR_OK;
+}
+#if LWIP_CALLBACK_API
+/**
+ * Default accept callback if no accept callback is specified by the user.
+ */
+static err_t
+tcp_accept_null(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+  LWIP_UNUSED_ARG(arg);
+  LWIP_UNUSED_ARG(pcb);
+  LWIP_UNUSED_ARG(err);
+
+  return ERR_ABRT;
+}
+#endif /* LWIP_CALLBACK_API */
+
+/**
+ * Set the state of the connection to be LISTEN, which means that it
+ * is able to accept incoming connections. The protocol control block
+ * is reallocated in order to consume less memory. Setting the
+ * connection to LISTEN is an irreversible process.
+ *
+ * @param pcb the original tcp_pcb
+ * @param backlog the incoming connections queue limit
+ * @return tcp_pcb used for listening, consumes less memory.
+ *
+ * @note The original tcp_pcb is freed. This function therefore has to be
+ *       called like this:
+ *             tpcb = tcp_listen(tpcb);
+ */
+struct tcp_pcb *
+tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog)
+{
+  struct tcp_pcb_listen *lpcb;
+
+  LWIP_UNUSED_ARG(backlog);
+  LWIP_ERROR("tcp_listen: pcb already connected", pcb->state == CLOSED, return NULL);
+
+  /* already listening? */
+  if (pcb->state == LISTEN) {
+    return pcb;
+  }
+  lpcb = memp_malloc(MEMP_TCP_PCB_LISTEN);
+  if (lpcb == NULL) {
+    return NULL;
+  }
+  lpcb->callback_arg = pcb->callback_arg;
+  lpcb->local_port = pcb->local_port;
+  lpcb->state = LISTEN;
+  lpcb->so_options = pcb->so_options;
+  lpcb->so_options |= SOF_ACCEPTCONN;
+  lpcb->ttl = pcb->ttl;
+  lpcb->tos = pcb->tos;
+  ip_addr_set(&lpcb->local_ip, &pcb->local_ip);
+  TCP_RMV(&tcp_bound_pcbs, pcb);
+  memp_free(MEMP_TCP_PCB, pcb);
+#if LWIP_CALLBACK_API
+  lpcb->accept = tcp_accept_null;
+#endif /* LWIP_CALLBACK_API */
+#if TCP_LISTEN_BACKLOG
+  lpcb->accepts_pending = 0;
+  lpcb->backlog = (backlog ? backlog : 1);
+#endif /* TCP_LISTEN_BACKLOG */
+  TCP_REG(&tcp_listen_pcbs.listen_pcbs, lpcb);
+  return (struct tcp_pcb *)lpcb;
+}
+
+/** 
+ * Update the state that tracks the available window space to advertise.
+ *
+ * Returns how much extra window would be advertised if we sent an
+ * update now.
+ */
+u32_t tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb)
+{
+  u32_t new_right_edge = pcb->rcv_nxt + pcb->rcv_wnd;
+
+  if (TCP_SEQ_GEQ(new_right_edge, pcb->rcv_ann_right_edge + pcb->mss)) {
+    /* we can advertise more window */
+    pcb->rcv_ann_wnd = pcb->rcv_wnd;
+    return new_right_edge - pcb->rcv_ann_right_edge;
+  } else {
+    if (TCP_SEQ_GT(pcb->rcv_nxt, pcb->rcv_ann_right_edge)) {
+      /* Can happen due to other end sending out of advertised window,
+       * but within actual available (but not yet advertised) window */
+      pcb->rcv_ann_wnd = 0;
+    } else {
+      /* keep the right edge of window constant */
+      pcb->rcv_ann_wnd = pcb->rcv_ann_right_edge - pcb->rcv_nxt;
+    }
+    return 0;
+  }
+}
+
+/**
+ * This function should be called by the application when it has
+ * processed the data. The purpose is to advertise a larger window
+ * when the data has been processed.
+ *
+ * @param pcb the tcp_pcb for which data is read
+ * @param len the amount of bytes that have been read by the application
+ */
+void
+tcp_recved(struct tcp_pcb *pcb, u16_t len)
+{
+  int wnd_inflation;
+
+  LWIP_ASSERT("tcp_recved: len would wrap rcv_wnd\n",
+              len <= 0xffff - pcb->rcv_wnd );
+
+  pcb->rcv_wnd += len;
+  if (pcb->rcv_wnd > TCP_WND)
+    pcb->rcv_wnd = TCP_WND;
+
+  wnd_inflation = tcp_update_rcv_ann_wnd(pcb);
+
+  /* If the change in the right edge of window is significant (default
+   * watermark is TCP_WND/2), then send an explicit update now.
+   * Otherwise wait for a packet to be sent in the normal course of
+   * events (or more window to be available later) */
+  if (wnd_inflation >= TCP_WND_UPDATE_THRESHOLD) 
+    tcp_ack_now(pcb);
+
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_recved: recveived %"U16_F" bytes, wnd %"U16_F" (%"U16_F").\n",
+         len, pcb->rcv_wnd, TCP_WND - pcb->rcv_wnd));
+}
+
+/**
+ * A nastly hack featuring 'goto' statements that allocates a
+ * new TCP local port.
+ *
+ * @return a new (free) local TCP port number
+ */
+static u16_t
+tcp_new_port(void)
+{
+  struct tcp_pcb *pcb;
+#ifndef TCP_LOCAL_PORT_RANGE_START
+#define TCP_LOCAL_PORT_RANGE_START 4096
+#define TCP_LOCAL_PORT_RANGE_END   0x7fff
+#endif
+  static u16_t port = TCP_LOCAL_PORT_RANGE_START;
+  
+ again:
+  if (++port > TCP_LOCAL_PORT_RANGE_END) {
+    port = TCP_LOCAL_PORT_RANGE_START;
+  }
+  
+  for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) {
+    if (pcb->local_port == port) {
+      goto again;
+    }
+  }
+  for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) {
+    if (pcb->local_port == port) {
+      goto again;
+    }
+  }
+  for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) {
+    if (pcb->local_port == port) {
+      goto again;
+    }
+  }
+  return port;
+}
+
+/**
+ * Connects to another host. The function given as the "connected"
+ * argument will be called when the connection has been established.
+ *
+ * @param pcb the tcp_pcb used to establish the connection
+ * @param ipaddr the remote ip address to connect to
+ * @param port the remote tcp port to connect to
+ * @param connected callback function to call when connected (or on error)
+ * @return ERR_VAL if invalid arguments are given
+ *         ERR_OK if connect request has been sent
+ *         other err_t values if connect request couldn't be sent
+ */
+err_t
+tcp_connect(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port,
+      err_t (* connected)(void *arg, struct tcp_pcb *tpcb, err_t err))
+{
+  err_t ret;
+  u32_t iss;
+
+  LWIP_ERROR("tcp_connect: can only connected from state CLOSED", pcb->state == CLOSED, return ERR_ISCONN);
+
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_connect to port %"U16_F"\n", port));
+  if (ipaddr != NULL) {
+    pcb->remote_ip = *ipaddr;
+  } else {
+    return ERR_VAL;
+  }
+  pcb->remote_port = port;
+  if (pcb->local_port == 0) {
+    pcb->local_port = tcp_new_port();
+  }
+  iss = tcp_next_iss();
+  pcb->rcv_nxt = 0;
+  pcb->snd_nxt = iss;
+  pcb->lastack = iss - 1;
+  pcb->snd_lbb = iss - 1;
+  pcb->rcv_wnd = TCP_WND;
+  pcb->rcv_ann_wnd = TCP_WND;
+  pcb->rcv_ann_right_edge = pcb->rcv_nxt;
+  pcb->snd_wnd = TCP_WND;
+  /* As initial send MSS, we use TCP_MSS but limit it to 536.
+     The send MSS is updated when an MSS option is received. */
+  pcb->mss = (TCP_MSS > 536) ? 536 : TCP_MSS;
+#if TCP_CALCULATE_EFF_SEND_MSS
+  pcb->mss = tcp_eff_send_mss(pcb->mss, ipaddr);
+#endif /* TCP_CALCULATE_EFF_SEND_MSS */
+  pcb->cwnd = 1;
+  pcb->ssthresh = pcb->mss * 10;
+  pcb->state = SYN_SENT;
+#if LWIP_CALLBACK_API  
+  pcb->connected = connected;
+#endif /* LWIP_CALLBACK_API */
+  TCP_RMV(&tcp_bound_pcbs, pcb);
+  TCP_REG(&tcp_active_pcbs, pcb);
+
+  snmp_inc_tcpactiveopens();
+  
+  ret = tcp_enqueue(pcb, NULL, 0, TCP_SYN, 0, TF_SEG_OPTS_MSS
+#if LWIP_TCP_TIMESTAMPS
+                    | TF_SEG_OPTS_TS
+#endif
+                    );
+  if (ret == ERR_OK) { 
+    tcp_output(pcb);
+  }
+  return ret;
+} 
+
+/**
+ * Called every 500 ms and implements the retransmission timer and the timer that
+ * removes PCBs that have been in TIME-WAIT for enough time. It also increments
+ * various timers such as the inactivity timer in each PCB.
+ *
+ * Automatically called from tcp_tmr().
+ */
+void
+tcp_slowtmr(void)
+{
+  struct tcp_pcb *pcb, *pcb2, *prev;
+  u16_t eff_wnd;
+  u8_t pcb_remove;      /* flag if a PCB should be removed */
+  err_t err;
+
+  err = ERR_OK;
+
+  ++tcp_ticks;
+
+  /* Steps through all of the active PCBs. */
+  prev = NULL;
+  pcb = tcp_active_pcbs;
+  if (pcb == NULL) {
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: no active pcbs\n"));
+  }
+  while (pcb != NULL) {
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: processing active pcb\n"));
+    LWIP_ASSERT("tcp_slowtmr: active pcb->state != CLOSED\n", pcb->state != CLOSED);
+    LWIP_ASSERT("tcp_slowtmr: active pcb->state != LISTEN\n", pcb->state != LISTEN);
+    LWIP_ASSERT("tcp_slowtmr: active pcb->state != TIME-WAIT\n", pcb->state != TIME_WAIT);
+
+    pcb_remove = 0;
+
+    if (pcb->state == SYN_SENT && pcb->nrtx == TCP_SYNMAXRTX) {
+      ++pcb_remove;
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max SYN retries reached\n"));
+    }
+    else if (pcb->nrtx == TCP_MAXRTX) {
+      ++pcb_remove;
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: max DATA retries reached\n"));
+    } else {
+      if (pcb->persist_backoff > 0) {
+        /* If snd_wnd is zero, use persist timer to send 1 byte probes
+         * instead of using the standard retransmission mechanism. */
+        pcb->persist_cnt++;
+        if (pcb->persist_cnt >= tcp_persist_backoff[pcb->persist_backoff-1]) {
+          pcb->persist_cnt = 0;
+          if (pcb->persist_backoff < sizeof(tcp_persist_backoff)) {
+            pcb->persist_backoff++;
+          }
+          tcp_zero_window_probe(pcb);
+        }
+      } else {
+        /* Increase the retransmission timer if it is running */
+        if(pcb->rtime >= 0)
+          ++pcb->rtime;
+
+        if (pcb->unacked != NULL && pcb->rtime >= pcb->rto) {
+          /* Time for a retransmission. */
+          LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_slowtmr: rtime %"S16_F
+                                      " pcb->rto %"S16_F"\n",
+                                      pcb->rtime, pcb->rto));
+
+          /* Double retransmission time-out unless we are trying to
+           * connect to somebody (i.e., we are in SYN_SENT). */
+          if (pcb->state != SYN_SENT) {
+            pcb->rto = ((pcb->sa >> 3) + pcb->sv) << tcp_backoff[pcb->nrtx];
+          }
+
+          /* Reset the retransmission timer. */
+          pcb->rtime = 0;
+
+          /* Reduce congestion window and ssthresh. */
+          eff_wnd = LWIP_MIN(pcb->cwnd, pcb->snd_wnd);
+          pcb->ssthresh = eff_wnd >> 1;
+          if (pcb->ssthresh < pcb->mss) {
+            pcb->ssthresh = pcb->mss * 2;
+          }
+          pcb->cwnd = pcb->mss;
+          LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: cwnd %"U16_F
+                                       " ssthresh %"U16_F"\n",
+                                       pcb->cwnd, pcb->ssthresh));
+ 
+          /* The following needs to be called AFTER cwnd is set to one
+             mss - STJ */
+          tcp_rexmit_rto(pcb);
+        }
+      }
+    }
+    /* Check if this PCB has stayed too long in FIN-WAIT-2 */
+    if (pcb->state == FIN_WAIT_2) {
+      if ((u32_t)(tcp_ticks - pcb->tmr) >
+          TCP_FIN_WAIT_TIMEOUT / TCP_SLOW_INTERVAL) {
+        ++pcb_remove;
+        LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in FIN-WAIT-2\n"));
+      }
+    }
+
+    /* Check if KEEPALIVE should be sent */
+    if((pcb->so_options & SOF_KEEPALIVE) && 
+       ((pcb->state == ESTABLISHED) || 
+        (pcb->state == CLOSE_WAIT))) {
+#if LWIP_TCP_KEEPALIVE
+      if((u32_t)(tcp_ticks - pcb->tmr) > 
+         (pcb->keep_idle + (pcb->keep_cnt*pcb->keep_intvl))
+         / TCP_SLOW_INTERVAL)
+#else      
+      if((u32_t)(tcp_ticks - pcb->tmr) > 
+         (pcb->keep_idle + TCP_MAXIDLE) / TCP_SLOW_INTERVAL)
+#endif /* LWIP_TCP_KEEPALIVE */
+      {
+        LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: KEEPALIVE timeout. Aborting connection to %"U16_F".%"U16_F".%"U16_F".%"U16_F".\n",
+                                ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip),
+                                ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip)));
+        
+        tcp_abort(pcb);
+      }
+#if LWIP_TCP_KEEPALIVE
+      else if((u32_t)(tcp_ticks - pcb->tmr) > 
+              (pcb->keep_idle + pcb->keep_cnt_sent * pcb->keep_intvl)
+              / TCP_SLOW_INTERVAL)
+#else
+      else if((u32_t)(tcp_ticks - pcb->tmr) > 
+              (pcb->keep_idle + pcb->keep_cnt_sent * TCP_KEEPINTVL_DEFAULT) 
+              / TCP_SLOW_INTERVAL)
+#endif /* LWIP_TCP_KEEPALIVE */
+      {
+        tcp_keepalive(pcb);
+        pcb->keep_cnt_sent++;
+      }
+    }
+
+    /* If this PCB has queued out of sequence data, but has been
+       inactive for too long, will drop the data (it will eventually
+       be retransmitted). */
+#if TCP_QUEUE_OOSEQ    
+    if (pcb->ooseq != NULL &&
+        (u32_t)tcp_ticks - pcb->tmr >= pcb->rto * TCP_OOSEQ_TIMEOUT) {
+      tcp_segs_free(pcb->ooseq);
+      pcb->ooseq = NULL;
+      LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_slowtmr: dropping OOSEQ queued data\n"));
+    }
+#endif /* TCP_QUEUE_OOSEQ */
+
+    /* Check if this PCB has stayed too long in SYN-RCVD */
+    if (pcb->state == SYN_RCVD) {
+      if ((u32_t)(tcp_ticks - pcb->tmr) >
+          TCP_SYN_RCVD_TIMEOUT / TCP_SLOW_INTERVAL) {
+        ++pcb_remove;
+        LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in SYN-RCVD\n"));
+      }
+    }
+
+    /* Check if this PCB has stayed too long in LAST-ACK */
+    if (pcb->state == LAST_ACK) {
+      if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) {
+        ++pcb_remove;
+        LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: removing pcb stuck in LAST-ACK\n"));
+      }
+    }
+
+    /* If the PCB should be removed, do it. */
+    if (pcb_remove) {
+      tcp_pcb_purge(pcb);      
+      /* Remove PCB from tcp_active_pcbs list. */
+      if (prev != NULL) {
+        LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_active_pcbs", pcb != tcp_active_pcbs);
+        prev->next = pcb->next;
+      } else {
+        /* This PCB was the first. */
+        LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_active_pcbs", tcp_active_pcbs == pcb);
+        tcp_active_pcbs = pcb->next;
+      }
+
+      TCP_EVENT_ERR(pcb->errf, pcb->callback_arg, ERR_ABRT);
+
+      pcb2 = pcb->next;
+      memp_free(MEMP_TCP_PCB, pcb);
+      pcb = pcb2;
+    } else {
+
+      /* We check if we should poll the connection. */
+      ++pcb->polltmr;
+      if (pcb->polltmr >= pcb->pollinterval) {
+        pcb->polltmr = 0;
+        LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: polling application\n"));
+        TCP_EVENT_POLL(pcb, err);
+        if (err == ERR_OK) {
+          tcp_output(pcb);
+        }
+      }
+      
+      prev = pcb;
+      pcb = pcb->next;
+    }
+  }
+
+  
+  /* Steps through all of the TIME-WAIT PCBs. */
+  prev = NULL;    
+  pcb = tcp_tw_pcbs;
+  while (pcb != NULL) {
+    LWIP_ASSERT("tcp_slowtmr: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT);
+    pcb_remove = 0;
+
+    /* Check if this PCB has stayed long enough in TIME-WAIT */
+    if ((u32_t)(tcp_ticks - pcb->tmr) > 2 * TCP_MSL / TCP_SLOW_INTERVAL) {
+      ++pcb_remove;
+    }
+    
+
+
+    /* If the PCB should be removed, do it. */
+    if (pcb_remove) {
+      tcp_pcb_purge(pcb);      
+      /* Remove PCB from tcp_tw_pcbs list. */
+      if (prev != NULL) {
+        LWIP_ASSERT("tcp_slowtmr: middle tcp != tcp_tw_pcbs", pcb != tcp_tw_pcbs);
+        prev->next = pcb->next;
+      } else {
+        /* This PCB was the first. */
+        LWIP_ASSERT("tcp_slowtmr: first pcb == tcp_tw_pcbs", tcp_tw_pcbs == pcb);
+        tcp_tw_pcbs = pcb->next;
+      }
+      pcb2 = pcb->next;
+      memp_free(MEMP_TCP_PCB, pcb);
+      pcb = pcb2;
+    } else {
+      prev = pcb;
+      pcb = pcb->next;
+    }
+  }
+}
+
+/**
+ * Is called every TCP_FAST_INTERVAL (250 ms) and process data previously
+ * "refused" by upper layer (application) and sends delayed ACKs.
+ *
+ * Automatically called from tcp_tmr().
+ */
+void
+tcp_fasttmr(void)
+{
+  struct tcp_pcb *pcb;
+
+  for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) {
+    /* If there is data which was previously "refused" by upper layer */
+    if (pcb->refused_data != NULL) {
+      /* Notify again application with data previously received. */
+      err_t err;
+      LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_fasttmr: notify kept packet\n"));
+      TCP_EVENT_RECV(pcb, pcb->refused_data, ERR_OK, err);
+      if (err == ERR_OK) {
+        pcb->refused_data = NULL;
+      }
+    }
+
+    /* send delayed ACKs */  
+    if (pcb->flags & TF_ACK_DELAY) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_fasttmr: delayed ACK\n"));
+      tcp_ack_now(pcb);
+      pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW);
+    }
+  }
+}
+
+/**
+ * Deallocates a list of TCP segments (tcp_seg structures).
+ *
+ * @param seg tcp_seg list of TCP segments to free
+ * @return the number of pbufs that were deallocated
+ */
+u8_t
+tcp_segs_free(struct tcp_seg *seg)
+{
+  u8_t count = 0;
+  struct tcp_seg *next;
+  while (seg != NULL) {
+    next = seg->next;
+    count += tcp_seg_free(seg);
+    seg = next;
+  }
+  return count;
+}
+
+/**
+ * Frees a TCP segment (tcp_seg structure).
+ *
+ * @param seg single tcp_seg to free
+ * @return the number of pbufs that were deallocated
+ */
+u8_t
+tcp_seg_free(struct tcp_seg *seg)
+{
+  u8_t count = 0;
+  
+  if (seg != NULL) {
+    if (seg->p != NULL) {
+      count = pbuf_free(seg->p);
+#if TCP_DEBUG
+      seg->p = NULL;
+#endif /* TCP_DEBUG */
+    }
+    memp_free(MEMP_TCP_SEG, seg);
+  }
+  return count;
+}
+
+/**
+ * Sets the priority of a connection.
+ *
+ * @param pcb the tcp_pcb to manipulate
+ * @param prio new priority
+ */
+void
+tcp_setprio(struct tcp_pcb *pcb, u8_t prio)
+{
+  pcb->prio = prio;
+}
+#if TCP_QUEUE_OOSEQ
+
+/**
+ * Returns a copy of the given TCP segment.
+ * The pbuf and data are not copied, only the pointers
+ *
+ * @param seg the old tcp_seg
+ * @return a copy of seg
+ */ 
+struct tcp_seg *
+tcp_seg_copy(struct tcp_seg *seg)
+{
+  struct tcp_seg *cseg;
+
+  cseg = memp_malloc(MEMP_TCP_SEG);
+  if (cseg == NULL) {
+    return NULL;
+  }
+  SMEMCPY((u8_t *)cseg, (const u8_t *)seg, sizeof(struct tcp_seg)); 
+  pbuf_ref(cseg->p);
+  return cseg;
+}
+#endif
+
+#if LWIP_CALLBACK_API
+/**
+ * Default receive callback that is called if the user didn't register
+ * a recv callback for the pcb.
+ */
+static err_t
+tcp_recv_null(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+  arg = arg;
+  if (p != NULL) {
+    pbuf_free(p);
+  } else if (err == ERR_OK) {
+    return tcp_close(pcb);
+  }
+  return ERR_OK;
+}
+#endif /* LWIP_CALLBACK_API */
+
+/**
+ * Kills the oldest active connection that has lower priority than prio.
+ *
+ * @param prio minimum priority
+ */
+static void
+tcp_kill_prio(u8_t prio)
+{
+  struct tcp_pcb *pcb, *inactive;
+  u32_t inactivity;
+  u8_t mprio;
+
+
+  mprio = TCP_PRIO_MAX;
+  
+  /* We kill the oldest active connection that has lower priority than prio. */
+  inactivity = 0;
+  inactive = NULL;
+  for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) {
+    if (pcb->prio <= prio &&
+       pcb->prio <= mprio &&
+       (u32_t)(tcp_ticks - pcb->tmr) >= inactivity) {
+      inactivity = tcp_ticks - pcb->tmr;
+      inactive = pcb;
+      mprio = pcb->prio;
+    }
+  }
+  if (inactive != NULL) {
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_prio: killing oldest PCB %p (%"S32_F")\n",
+           (void *)inactive, inactivity));
+    tcp_abort(inactive);
+  }      
+}
+
+/**
+ * Kills the oldest connection that is in TIME_WAIT state.
+ * Called from tcp_alloc() if no more connections are available.
+ */
+static void
+tcp_kill_timewait(void)
+{
+  struct tcp_pcb *pcb, *inactive;
+  u32_t inactivity;
+
+  inactivity = 0;
+  inactive = NULL;
+  /* Go through the list of TIME_WAIT pcbs and get the oldest pcb. */
+  for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) {
+    if ((u32_t)(tcp_ticks - pcb->tmr) >= inactivity) {
+      inactivity = tcp_ticks - pcb->tmr;
+      inactive = pcb;
+    }
+  }
+  if (inactive != NULL) {
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_kill_timewait: killing oldest TIME-WAIT PCB %p (%"S32_F")\n",
+           (void *)inactive, inactivity));
+    tcp_abort(inactive);
+  }      
+}
+
+/**
+ * Allocate a new tcp_pcb structure.
+ *
+ * @param prio priority for the new pcb
+ * @return a new tcp_pcb that initially is in state CLOSED
+ */
+struct tcp_pcb *
+tcp_alloc(u8_t prio)
+{
+  struct tcp_pcb *pcb;
+  u32_t iss;
+  
+  pcb = memp_malloc(MEMP_TCP_PCB);
+  if (pcb == NULL) {
+    /* Try killing oldest connection in TIME-WAIT. */
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_alloc: killing off oldest TIME-WAIT connection\n"));
+    tcp_kill_timewait();
+    /* Try to allocate a tcp_pcb again. */
+    pcb = memp_malloc(MEMP_TCP_PCB);
+    if (pcb == NULL) {
+      /* Try killing active connections with lower priority than the new one. */
+      tcp_kill_prio(prio);
+      /* Try to allocate a tcp_pcb again. */
+      pcb = memp_malloc(MEMP_TCP_PCB);
+    }
+  }
+  if (pcb != NULL) {
+    memset(pcb, 0, sizeof(struct tcp_pcb));
+    pcb->prio = TCP_PRIO_NORMAL;
+    pcb->snd_buf = TCP_SND_BUF;
+    pcb->snd_queuelen = 0;
+    pcb->rcv_wnd = TCP_WND;
+    pcb->rcv_ann_wnd = TCP_WND;
+    pcb->tos = 0;
+    pcb->ttl = TCP_TTL;
+    /* As initial send MSS, we use TCP_MSS but limit it to 536.
+       The send MSS is updated when an MSS option is received. */
+    pcb->mss = (TCP_MSS > 536) ? 536 : TCP_MSS;
+    pcb->rto = 3000 / TCP_SLOW_INTERVAL;
+    pcb->sa = 0;
+    pcb->sv = 3000 / TCP_SLOW_INTERVAL;
+    pcb->rtime = -1;
+    pcb->cwnd = 1;
+    iss = tcp_next_iss();
+    pcb->snd_wl2 = iss;
+    pcb->snd_nxt = iss;
+    pcb->lastack = iss;
+    pcb->snd_lbb = iss;   
+    pcb->tmr = tcp_ticks;
+
+    pcb->polltmr = 0;
+
+#if LWIP_CALLBACK_API
+    pcb->recv = tcp_recv_null;
+#endif /* LWIP_CALLBACK_API */  
+    
+    /* Init KEEPALIVE timer */
+    pcb->keep_idle  = TCP_KEEPIDLE_DEFAULT;
+    
+#if LWIP_TCP_KEEPALIVE
+    pcb->keep_intvl = TCP_KEEPINTVL_DEFAULT;
+    pcb->keep_cnt   = TCP_KEEPCNT_DEFAULT;
+#endif /* LWIP_TCP_KEEPALIVE */
+
+    pcb->keep_cnt_sent = 0;
+  }
+  return pcb;
+}
+
+/**
+ * Creates a new TCP protocol control block but doesn't place it on
+ * any of the TCP PCB lists.
+ * The pcb is not put on any list until binding using tcp_bind().
+ *
+ * @internal: Maybe there should be a idle TCP PCB list where these
+ * PCBs are put on. Port reservation using tcp_bind() is implemented but
+ * allocated pcbs that are not bound can't be killed automatically if wanting
+ * to allocate a pcb with higher prio (@see tcp_kill_prio())
+ *
+ * @return a new tcp_pcb that initially is in state CLOSED
+ */
+struct tcp_pcb *
+tcp_new(void)
+{
+  return tcp_alloc(TCP_PRIO_NORMAL);
+}
+
+/**
+ * Used to specify the argument that should be passed callback
+ * functions.
+ *
+ * @param pcb tcp_pcb to set the callback argument
+ * @param arg void pointer argument to pass to callback functions
+ */ 
+void
+tcp_arg(struct tcp_pcb *pcb, void *arg)
+{  
+  pcb->callback_arg = arg;
+}
+#if LWIP_CALLBACK_API
+
+/**
+ * Used to specify the function that should be called when a TCP
+ * connection receives data.
+ *
+ * @param pcb tcp_pcb to set the recv callback
+ * @param recv callback function to call for this pcb when data is received
+ */ 
+void
+tcp_recv(struct tcp_pcb *pcb,
+   err_t (* recv)(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err))
+{
+  pcb->recv = recv;
+}
+
+/**
+ * Used to specify the function that should be called when TCP data
+ * has been successfully delivered to the remote host.
+ *
+ * @param pcb tcp_pcb to set the sent callback
+ * @param sent callback function to call for this pcb when data is successfully sent
+ */ 
+void
+tcp_sent(struct tcp_pcb *pcb,
+   err_t (* sent)(void *arg, struct tcp_pcb *tpcb, u16_t len))
+{
+  pcb->sent = sent;
+}
+
+/**
+ * Used to specify the function that should be called when a fatal error
+ * has occured on the connection.
+ *
+ * @param pcb tcp_pcb to set the err callback
+ * @param errf callback function to call for this pcb when a fatal error
+ *        has occured on the connection
+ */ 
+void
+tcp_err(struct tcp_pcb *pcb,
+   void (* errf)(void *arg, err_t err))
+{
+  pcb->errf = errf;
+}
+
+/**
+ * Used for specifying the function that should be called when a
+ * LISTENing connection has been connected to another host.
+ *
+ * @param pcb tcp_pcb to set the accept callback
+ * @param accept callback function to call for this pcb when LISTENing
+ *        connection has been connected to another host
+ */ 
+void
+tcp_accept(struct tcp_pcb *pcb,
+     err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err))
+{
+  pcb->accept = accept;
+}
+#endif /* LWIP_CALLBACK_API */
+
+
+/**
+ * Used to specify the function that should be called periodically
+ * from TCP. The interval is specified in terms of the TCP coarse
+ * timer interval, which is called twice a second.
+ *
+ */ 
+void
+tcp_poll(struct tcp_pcb *pcb,
+   err_t (* poll)(void *arg, struct tcp_pcb *tpcb), u8_t interval)
+{
+#if LWIP_CALLBACK_API
+  pcb->poll = poll;
+#endif /* LWIP_CALLBACK_API */  
+  pcb->pollinterval = interval;
+}
+
+/**
+ * Purges a TCP PCB. Removes any buffered data and frees the buffer memory
+ * (pcb->ooseq, pcb->unsent and pcb->unacked are freed).
+ *
+ * @param pcb tcp_pcb to purge. The pcb itself is not deallocated!
+ */
+void
+tcp_pcb_purge(struct tcp_pcb *pcb)
+{
+  if (pcb->state != CLOSED &&
+     pcb->state != TIME_WAIT &&
+     pcb->state != LISTEN) {
+
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge\n"));
+
+#if TCP_LISTEN_BACKLOG
+    if (pcb->state == SYN_RCVD) {
+      /* Need to find the corresponding listen_pcb and decrease its accepts_pending */
+      struct tcp_pcb_listen *lpcb;
+      LWIP_ASSERT("tcp_pcb_purge: pcb->state == SYN_RCVD but tcp_listen_pcbs is NULL",
+        tcp_listen_pcbs.listen_pcbs != NULL);
+      for (lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
+        if ((lpcb->local_port == pcb->local_port) &&
+            (ip_addr_isany(&lpcb->local_ip) ||
+             ip_addr_cmp(&pcb->local_ip, &lpcb->local_ip))) {
+            /* port and address of the listen pcb match the timed-out pcb */
+            LWIP_ASSERT("tcp_pcb_purge: listen pcb does not have accepts pending",
+              lpcb->accepts_pending > 0);
+            lpcb->accepts_pending--;
+            break;
+          }
+      }
+    }
+#endif /* TCP_LISTEN_BACKLOG */
+
+
+    if (pcb->refused_data != NULL) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->refused_data\n"));
+      pbuf_free(pcb->refused_data);
+      pcb->refused_data = NULL;
+    }
+    if (pcb->unsent != NULL) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: not all data sent\n"));
+    }
+    if (pcb->unacked != NULL) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->unacked\n"));
+    }
+#if TCP_QUEUE_OOSEQ /* LW */
+    if (pcb->ooseq != NULL) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_pcb_purge: data left on ->ooseq\n"));
+    }
+
+    /* Stop the retransmission timer as it will expect data on unacked
+       queue if it fires */
+    pcb->rtime = -1;
+
+    tcp_segs_free(pcb->ooseq);
+    pcb->ooseq = NULL;
+#endif /* TCP_QUEUE_OOSEQ */
+    tcp_segs_free(pcb->unsent);
+    tcp_segs_free(pcb->unacked);
+    pcb->unacked = pcb->unsent = NULL;
+  }
+}
+
+/**
+ * Purges the PCB and removes it from a PCB list. Any delayed ACKs are sent first.
+ *
+ * @param pcblist PCB list to purge.
+ * @param pcb tcp_pcb to purge. The pcb itself is also deallocated!
+ */
+void
+tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb)
+{
+  TCP_RMV(pcblist, pcb);
+
+  tcp_pcb_purge(pcb);
+  
+  /* if there is an outstanding delayed ACKs, send it */
+  if (pcb->state != TIME_WAIT &&
+     pcb->state != LISTEN &&
+     pcb->flags & TF_ACK_DELAY) {
+    pcb->flags |= TF_ACK_NOW;
+    tcp_output(pcb);
+  }
+
+  if (pcb->state != LISTEN) {
+    LWIP_ASSERT("unsent segments leaking", pcb->unsent == NULL);
+    LWIP_ASSERT("unacked segments leaking", pcb->unacked == NULL);
+#if TCP_QUEUE_OOSEQ
+    LWIP_ASSERT("ooseq segments leaking", pcb->ooseq == NULL);
+#endif /* TCP_QUEUE_OOSEQ */
+  }
+
+  pcb->state = CLOSED;
+
+  LWIP_ASSERT("tcp_pcb_remove: tcp_pcbs_sane()", tcp_pcbs_sane());
+}
+
+/**
+ * Calculates a new initial sequence number for new connections.
+ *
+ * @return u32_t pseudo random sequence number
+ */
+u32_t
+tcp_next_iss(void)
+{
+  static u32_t iss = 6510;
+  
+  iss += tcp_ticks;       /* XXX */
+  return iss;
+}
+
+#if TCP_CALCULATE_EFF_SEND_MSS
+/**
+ * Calcluates the effective send mss that can be used for a specific IP address
+ * by using ip_route to determin the netif used to send to the address and
+ * calculating the minimum of TCP_MSS and that netif's mtu (if set).
+ */
+u16_t
+tcp_eff_send_mss(u16_t sendmss, struct ip_addr *addr)
+{
+  u16_t mss_s;
+  struct netif *outif;
+
+  outif = ip_route(addr);
+  if ((outif != NULL) && (outif->mtu != 0)) {
+    mss_s = outif->mtu - IP_HLEN - TCP_HLEN;
+    /* RFC 1122, chap 4.2.2.6:
+     * Eff.snd.MSS = min(SendMSS+20, MMS_S) - TCPhdrsize - IPoptionsize
+     * We correct for TCP options in tcp_enqueue(), and don't support
+     * IP options
+     */
+    sendmss = LWIP_MIN(sendmss, mss_s);
+  }
+  return sendmss;
+}
+#endif /* TCP_CALCULATE_EFF_SEND_MSS */
+
+#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
+/**
+ * Print a tcp header for debugging purposes.
+ *
+ * @param tcphdr pointer to a struct tcp_hdr
+ */
+void
+tcp_debug_print(struct tcp_hdr *tcphdr)
+{
+  LWIP_DEBUGF(TCP_DEBUG, ("TCP header:\n"));
+  LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(TCP_DEBUG, ("|    %5"U16_F"      |    %5"U16_F"      | (src port, dest port)\n",
+         ntohs(tcphdr->src), ntohs(tcphdr->dest)));
+  LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(TCP_DEBUG, ("|           %010"U32_F"          | (seq no)\n",
+          ntohl(tcphdr->seqno)));
+  LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(TCP_DEBUG, ("|           %010"U32_F"          | (ack no)\n",
+         ntohl(tcphdr->ackno)));
+  LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(TCP_DEBUG, ("| %2"U16_F" |   |%"U16_F"%"U16_F"%"U16_F"%"U16_F"%"U16_F"%"U16_F"|     %5"U16_F"     | (hdrlen, flags (",
+       TCPH_HDRLEN(tcphdr),
+         TCPH_FLAGS(tcphdr) >> 5 & 1,
+         TCPH_FLAGS(tcphdr) >> 4 & 1,
+         TCPH_FLAGS(tcphdr) >> 3 & 1,
+         TCPH_FLAGS(tcphdr) >> 2 & 1,
+         TCPH_FLAGS(tcphdr) >> 1 & 1,
+         TCPH_FLAGS(tcphdr) & 1,
+         ntohs(tcphdr->wnd)));
+  tcp_debug_print_flags(TCPH_FLAGS(tcphdr));
+  LWIP_DEBUGF(TCP_DEBUG, ("), win)\n"));
+  LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(TCP_DEBUG, ("|    0x%04"X16_F"     |     %5"U16_F"     | (chksum, urgp)\n",
+         ntohs(tcphdr->chksum), ntohs(tcphdr->urgp)));
+  LWIP_DEBUGF(TCP_DEBUG, ("+-------------------------------+\n"));
+}
+
+/**
+ * Print a tcp state for debugging purposes.
+ *
+ * @param s enum tcp_state to print
+ */
+void
+tcp_debug_print_state(enum tcp_state s)
+{
+  LWIP_DEBUGF(TCP_DEBUG, ("State: "));
+  switch (s) {
+  case CLOSED:
+    LWIP_DEBUGF(TCP_DEBUG, ("CLOSED\n"));
+    break;
+ case LISTEN:
+   LWIP_DEBUGF(TCP_DEBUG, ("LISTEN\n"));
+   break;
+  case SYN_SENT:
+    LWIP_DEBUGF(TCP_DEBUG, ("SYN_SENT\n"));
+    break;
+  case SYN_RCVD:
+    LWIP_DEBUGF(TCP_DEBUG, ("SYN_RCVD\n"));
+    break;
+  case ESTABLISHED:
+    LWIP_DEBUGF(TCP_DEBUG, ("ESTABLISHED\n"));
+    break;
+  case FIN_WAIT_1:
+    LWIP_DEBUGF(TCP_DEBUG, ("FIN_WAIT_1\n"));
+    break;
+  case FIN_WAIT_2:
+    LWIP_DEBUGF(TCP_DEBUG, ("FIN_WAIT_2\n"));
+    break;
+  case CLOSE_WAIT:
+    LWIP_DEBUGF(TCP_DEBUG, ("CLOSE_WAIT\n"));
+    break;
+  case CLOSING:
+    LWIP_DEBUGF(TCP_DEBUG, ("CLOSING\n"));
+    break;
+  case LAST_ACK:
+    LWIP_DEBUGF(TCP_DEBUG, ("LAST_ACK\n"));
+    break;
+  case TIME_WAIT:
+    LWIP_DEBUGF(TCP_DEBUG, ("TIME_WAIT\n"));
+   break;
+  }
+}
+
+/**
+ * Print tcp flags for debugging purposes.
+ *
+ * @param flags tcp flags, all active flags are printed
+ */
+void
+tcp_debug_print_flags(u8_t flags)
+{
+  if (flags & TCP_FIN) {
+    LWIP_DEBUGF(TCP_DEBUG, ("FIN "));
+  }
+  if (flags & TCP_SYN) {
+    LWIP_DEBUGF(TCP_DEBUG, ("SYN "));
+  }
+  if (flags & TCP_RST) {
+    LWIP_DEBUGF(TCP_DEBUG, ("RST "));
+  }
+  if (flags & TCP_PSH) {
+    LWIP_DEBUGF(TCP_DEBUG, ("PSH "));
+  }
+  if (flags & TCP_ACK) {
+    LWIP_DEBUGF(TCP_DEBUG, ("ACK "));
+  }
+  if (flags & TCP_URG) {
+    LWIP_DEBUGF(TCP_DEBUG, ("URG "));
+  }
+  if (flags & TCP_ECE) {
+    LWIP_DEBUGF(TCP_DEBUG, ("ECE "));
+  }
+  if (flags & TCP_CWR) {
+    LWIP_DEBUGF(TCP_DEBUG, ("CWR "));
+  }
+  LWIP_DEBUGF(TCP_DEBUG, ("\n"));
+}
+
+/**
+ * Print all tcp_pcbs in every list for debugging purposes.
+ */
+void
+tcp_debug_print_pcbs(void)
+{
+  struct tcp_pcb *pcb;
+  LWIP_DEBUGF(TCP_DEBUG, ("Active PCB states:\n"));
+  for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) {
+    LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ",
+                       pcb->local_port, pcb->remote_port,
+                       pcb->snd_nxt, pcb->rcv_nxt));
+    tcp_debug_print_state(pcb->state);
+  }    
+  LWIP_DEBUGF(TCP_DEBUG, ("Listen PCB states:\n"));
+  for(pcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs; pcb != NULL; pcb = pcb->next) {
+    LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ",
+                       pcb->local_port, pcb->remote_port,
+                       pcb->snd_nxt, pcb->rcv_nxt));
+    tcp_debug_print_state(pcb->state);
+  }    
+  LWIP_DEBUGF(TCP_DEBUG, ("TIME-WAIT PCB states:\n"));
+  for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) {
+    LWIP_DEBUGF(TCP_DEBUG, ("Local port %"U16_F", foreign port %"U16_F" snd_nxt %"U32_F" rcv_nxt %"U32_F" ",
+                       pcb->local_port, pcb->remote_port,
+                       pcb->snd_nxt, pcb->rcv_nxt));
+    tcp_debug_print_state(pcb->state);
+  }    
+}
+
+/**
+ * Check state consistency of the tcp_pcb lists.
+ */
+s16_t
+tcp_pcbs_sane(void)
+{
+  struct tcp_pcb *pcb;
+  for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) {
+    LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != CLOSED", pcb->state != CLOSED);
+    LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != LISTEN", pcb->state != LISTEN);
+    LWIP_ASSERT("tcp_pcbs_sane: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT);
+  }
+  for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) {
+    LWIP_ASSERT("tcp_pcbs_sane: tw pcb->state == TIME-WAIT", pcb->state == TIME_WAIT);
+  }
+  return 1;
+}
+#endif /* TCP_DEBUG */
+
+#endif /* LWIP_TCP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/tcp_in.c b/firmware/x300/lwip/lwip-1.3.1/src/core/tcp_in.c
new file mode 100644
index 000000000..362a4a62d
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/tcp_in.c
@@ -0,0 +1,1419 @@
+/**
+ * @file
+ * Transmission Control Protocol, incoming traffic
+ *
+ * The input processing functions of the TCP layer.
+ *
+ * These functions are generally called in the order (ip_input() ->)
+ * tcp_input() -> * tcp_process() -> tcp_receive() (-> application).
+ * 
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/tcp.h"
+#include "lwip/def.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+#include "arch/perf.h"
+
+/* These variables are global to all functions involved in the input
+   processing of TCP segments. They are set by the tcp_input()
+   function. */
+static struct tcp_seg inseg;
+static struct tcp_hdr *tcphdr;
+static struct ip_hdr *iphdr;
+static u32_t seqno, ackno;
+static u8_t flags;
+static u16_t tcplen;
+
+static u8_t recv_flags;
+static struct pbuf *recv_data;
+
+struct tcp_pcb *tcp_input_pcb;
+
+/* Forward declarations. */
+static err_t tcp_process(struct tcp_pcb *pcb);
+static u8_t tcp_receive(struct tcp_pcb *pcb);
+static void tcp_parseopt(struct tcp_pcb *pcb);
+
+static err_t tcp_listen_input(struct tcp_pcb_listen *pcb);
+static err_t tcp_timewait_input(struct tcp_pcb *pcb);
+
+/**
+ * The initial input processing of TCP. It verifies the TCP header, demultiplexes
+ * the segment between the PCBs and passes it on to tcp_process(), which implements
+ * the TCP finite state machine. This function is called by the IP layer (in
+ * ip_input()).
+ *
+ * @param p received TCP segment to process (p->payload pointing to the IP header)
+ * @param inp network interface on which this segment was received
+ */
+void
+tcp_input(struct pbuf *p, struct netif *inp)
+{
+  struct tcp_pcb *pcb, *prev;
+  struct tcp_pcb_listen *lpcb;
+  u8_t hdrlen;
+  err_t err;
+
+  PERF_START;
+
+  TCP_STATS_INC(tcp.recv);
+  snmp_inc_tcpinsegs();
+
+  iphdr = p->payload;
+  tcphdr = (struct tcp_hdr *)((u8_t *)p->payload + IPH_HL(iphdr) * 4);
+
+#if TCP_INPUT_DEBUG
+  tcp_debug_print(tcphdr);
+#endif
+
+  /* remove header from payload */
+  if (pbuf_header(p, -((s16_t)(IPH_HL(iphdr) * 4))) || (p->tot_len < sizeof(struct tcp_hdr))) {
+    /* drop short packets */
+    LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: short packet (%"U16_F" bytes) discarded\n", p->tot_len));
+    TCP_STATS_INC(tcp.lenerr);
+    TCP_STATS_INC(tcp.drop);
+    snmp_inc_tcpinerrs();
+    pbuf_free(p);
+    return;
+  }
+
+  /* Don't even process incoming broadcasts/multicasts. */
+  if (ip_addr_isbroadcast(&(iphdr->dest), inp) ||
+      ip_addr_ismulticast(&(iphdr->dest))) {
+    TCP_STATS_INC(tcp.proterr);
+    TCP_STATS_INC(tcp.drop);
+    snmp_inc_tcpinerrs();
+    pbuf_free(p);
+    return;
+  }
+
+#if CHECKSUM_CHECK_TCP
+  /* Verify TCP checksum. */
+  if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src),
+      (struct ip_addr *)&(iphdr->dest),
+      IP_PROTO_TCP, p->tot_len) != 0) {
+      LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packet discarded due to failing checksum 0x%04"X16_F"\n",
+        inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src), (struct ip_addr *)&(iphdr->dest),
+      IP_PROTO_TCP, p->tot_len)));
+#if TCP_DEBUG
+    tcp_debug_print(tcphdr);
+#endif /* TCP_DEBUG */
+    TCP_STATS_INC(tcp.chkerr);
+    TCP_STATS_INC(tcp.drop);
+    snmp_inc_tcpinerrs();
+    pbuf_free(p);
+    return;
+  }
+#endif
+
+  /* Move the payload pointer in the pbuf so that it points to the
+     TCP data instead of the TCP header. */
+  hdrlen = TCPH_HDRLEN(tcphdr);
+  if(pbuf_header(p, -(hdrlen * 4))){
+    /* drop short packets */
+    LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: short packet\n"));
+    TCP_STATS_INC(tcp.lenerr);
+    TCP_STATS_INC(tcp.drop);
+    snmp_inc_tcpinerrs();
+    pbuf_free(p);
+    return;
+  }
+
+  /* Convert fields in TCP header to host byte order. */
+  tcphdr->src = ntohs(tcphdr->src);
+  tcphdr->dest = ntohs(tcphdr->dest);
+  seqno = tcphdr->seqno = ntohl(tcphdr->seqno);
+  ackno = tcphdr->ackno = ntohl(tcphdr->ackno);
+  tcphdr->wnd = ntohs(tcphdr->wnd);
+
+  flags = TCPH_FLAGS(tcphdr);
+  tcplen = p->tot_len + ((flags & (TCP_FIN | TCP_SYN)) ? 1 : 0);
+
+  /* Demultiplex an incoming segment. First, we check if it is destined
+     for an active connection. */
+  prev = NULL;
+
+  
+  for(pcb = tcp_active_pcbs; pcb != NULL; pcb = pcb->next) {
+    LWIP_ASSERT("tcp_input: active pcb->state != CLOSED", pcb->state != CLOSED);
+    LWIP_ASSERT("tcp_input: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT);
+    LWIP_ASSERT("tcp_input: active pcb->state != LISTEN", pcb->state != LISTEN);
+    if (pcb->remote_port == tcphdr->src &&
+       pcb->local_port == tcphdr->dest &&
+       ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src)) &&
+       ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest))) {
+
+      /* Move this PCB to the front of the list so that subsequent
+         lookups will be faster (we exploit locality in TCP segment
+         arrivals). */
+      LWIP_ASSERT("tcp_input: pcb->next != pcb (before cache)", pcb->next != pcb);
+      if (prev != NULL) {
+        prev->next = pcb->next;
+        pcb->next = tcp_active_pcbs;
+        tcp_active_pcbs = pcb;
+      }
+      LWIP_ASSERT("tcp_input: pcb->next != pcb (after cache)", pcb->next != pcb);
+      break;
+    }
+    prev = pcb;
+  }
+
+  if (pcb == NULL) {
+    /* If it did not go to an active connection, we check the connections
+       in the TIME-WAIT state. */
+    for(pcb = tcp_tw_pcbs; pcb != NULL; pcb = pcb->next) {
+      LWIP_ASSERT("tcp_input: TIME-WAIT pcb->state == TIME-WAIT", pcb->state == TIME_WAIT);
+      if (pcb->remote_port == tcphdr->src &&
+         pcb->local_port == tcphdr->dest &&
+         ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src)) &&
+         ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest))) {
+        /* We don't really care enough to move this PCB to the front
+           of the list since we are not very likely to receive that
+           many segments for connections in TIME-WAIT. */
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packed for TIME_WAITing connection.\n"));
+        tcp_timewait_input(pcb);
+        pbuf_free(p);
+        return;
+      }
+    }
+
+  /* Finally, if we still did not get a match, we check all PCBs that
+     are LISTENing for incoming connections. */
+    prev = NULL;
+    for(lpcb = tcp_listen_pcbs.listen_pcbs; lpcb != NULL; lpcb = lpcb->next) {
+      if ((ip_addr_isany(&(lpcb->local_ip)) ||
+        ip_addr_cmp(&(lpcb->local_ip), &(iphdr->dest))) &&
+        lpcb->local_port == tcphdr->dest) {
+        /* Move this PCB to the front of the list so that subsequent
+           lookups will be faster (we exploit locality in TCP segment
+           arrivals). */
+        if (prev != NULL) {
+          ((struct tcp_pcb_listen *)prev)->next = lpcb->next;
+                /* our successor is the remainder of the listening list */
+          lpcb->next = tcp_listen_pcbs.listen_pcbs;
+                /* put this listening pcb at the head of the listening list */
+          tcp_listen_pcbs.listen_pcbs = lpcb;
+        }
+      
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: packed for LISTENing connection.\n"));
+        tcp_listen_input(lpcb);
+        pbuf_free(p);
+        return;
+      }
+      prev = (struct tcp_pcb *)lpcb;
+    }
+  }
+
+#if TCP_INPUT_DEBUG
+  LWIP_DEBUGF(TCP_INPUT_DEBUG, ("+-+-+-+-+-+-+-+-+-+-+-+-+-+- tcp_input: flags "));
+  tcp_debug_print_flags(TCPH_FLAGS(tcphdr));
+  LWIP_DEBUGF(TCP_INPUT_DEBUG, ("-+-+-+-+-+-+-+-+-+-+-+-+-+-+\n"));
+#endif /* TCP_INPUT_DEBUG */
+
+
+  if (pcb != NULL) {
+    /* The incoming segment belongs to a connection. */
+#if TCP_INPUT_DEBUG
+#if TCP_DEBUG
+    tcp_debug_print_state(pcb->state);
+#endif /* TCP_DEBUG */
+#endif /* TCP_INPUT_DEBUG */
+
+    /* Set up a tcp_seg structure. */
+    inseg.next = NULL;
+    inseg.len = p->tot_len;
+    inseg.dataptr = p->payload;
+    inseg.p = p;
+    inseg.tcphdr = tcphdr;
+
+    recv_data = NULL;
+    recv_flags = 0;
+
+    /* If there is data which was previously "refused" by upper layer */
+    if (pcb->refused_data != NULL) {
+      /* Notify again application with data previously received. */
+      LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: notify kept packet\n"));
+      TCP_EVENT_RECV(pcb, pcb->refused_data, ERR_OK, err);
+      if (err == ERR_OK) {
+        pcb->refused_data = NULL;
+      } else {
+        /* drop incoming packets, because pcb is "full" */
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: drop incoming packets, because pcb is \"full\"\n"));
+        TCP_STATS_INC(tcp.drop);
+        snmp_inc_tcpinerrs();
+        pbuf_free(p);
+        return;
+      }
+    }
+
+    tcp_input_pcb = pcb;
+    err = tcp_process(pcb);
+    tcp_input_pcb = NULL;
+    /* A return value of ERR_ABRT means that tcp_abort() was called
+       and that the pcb has been freed. If so, we don't do anything. */
+    if (err != ERR_ABRT) {
+      if (recv_flags & TF_RESET) {
+        /* TF_RESET means that the connection was reset by the other
+           end. We then call the error callback to inform the
+           application that the connection is dead before we
+           deallocate the PCB. */
+        TCP_EVENT_ERR(pcb->errf, pcb->callback_arg, ERR_RST);
+        tcp_pcb_remove(&tcp_active_pcbs, pcb);
+        memp_free(MEMP_TCP_PCB, pcb);
+      } else if (recv_flags & TF_CLOSED) {
+        /* The connection has been closed and we will deallocate the
+           PCB. */
+        tcp_pcb_remove(&tcp_active_pcbs, pcb);
+        memp_free(MEMP_TCP_PCB, pcb);
+      } else {
+        err = ERR_OK;
+        /* If the application has registered a "sent" function to be
+           called when new send buffer space is available, we call it
+           now. */
+        if (pcb->acked > 0) {
+          TCP_EVENT_SENT(pcb, pcb->acked, err);
+        }
+      
+        if (recv_data != NULL) {
+          if(flags & TCP_PSH) {
+            recv_data->flags |= PBUF_FLAG_PUSH;
+          }
+
+          /* Notify application that data has been received. */
+          TCP_EVENT_RECV(pcb, recv_data, ERR_OK, err);
+
+          /* If the upper layer can't receive this data, store it */
+          if (err != ERR_OK) {
+            pcb->refused_data = recv_data;
+            LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_input: keep incoming packet, because pcb is \"full\"\n"));
+          }
+        }
+
+        /* If a FIN segment was received, we call the callback
+           function with a NULL buffer to indicate EOF. */
+        if (recv_flags & TF_GOT_FIN) {
+          TCP_EVENT_RECV(pcb, NULL, ERR_OK, err);
+        }
+
+        /* If there were no errors, we try to send something out. */
+        if (err == ERR_OK) {
+          tcp_output(pcb);
+        }
+      }
+    }
+
+
+    /* give up our reference to inseg.p */
+    if (inseg.p != NULL)
+    {
+      pbuf_free(inseg.p);
+      inseg.p = NULL;
+    }
+#if TCP_INPUT_DEBUG
+#if TCP_DEBUG
+    tcp_debug_print_state(pcb->state);
+#endif /* TCP_DEBUG */
+#endif /* TCP_INPUT_DEBUG */
+      
+  } else {
+
+    /* If no matching PCB was found, send a TCP RST (reset) to the
+       sender. */
+    LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_input: no PCB match found, resetting.\n"));
+    if (!(TCPH_FLAGS(tcphdr) & TCP_RST)) {
+      TCP_STATS_INC(tcp.proterr);
+      TCP_STATS_INC(tcp.drop);
+      tcp_rst(ackno, seqno + tcplen,
+        &(iphdr->dest), &(iphdr->src),
+        tcphdr->dest, tcphdr->src);
+    }
+    pbuf_free(p);
+  }
+
+  LWIP_ASSERT("tcp_input: tcp_pcbs_sane()", tcp_pcbs_sane());
+  PERF_STOP("tcp_input");
+}
+
+/**
+ * Called by tcp_input() when a segment arrives for a listening
+ * connection (from tcp_input()).
+ *
+ * @param pcb the tcp_pcb_listen for which a segment arrived
+ * @return ERR_OK if the segment was processed
+ *         another err_t on error
+ *
+ * @note the return value is not (yet?) used in tcp_input()
+ * @note the segment which arrived is saved in global variables, therefore only the pcb
+ *       involved is passed as a parameter to this function
+ */
+static err_t
+tcp_listen_input(struct tcp_pcb_listen *pcb)
+{
+  struct tcp_pcb *npcb;
+  err_t rc;
+
+  /* In the LISTEN state, we check for incoming SYN segments,
+     creates a new PCB, and responds with a SYN|ACK. */
+  if (flags & TCP_ACK) {
+    /* For incoming segments with the ACK flag set, respond with a
+       RST. */
+    LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_listen_input: ACK in LISTEN, sending reset\n"));
+    tcp_rst(ackno + 1, seqno + tcplen,
+      &(iphdr->dest), &(iphdr->src),
+      tcphdr->dest, tcphdr->src);
+  } else if (flags & TCP_SYN) {
+    LWIP_DEBUGF(TCP_DEBUG, ("TCP connection request %"U16_F" -> %"U16_F".\n", tcphdr->src, tcphdr->dest));
+#if TCP_LISTEN_BACKLOG
+    if (pcb->accepts_pending >= pcb->backlog) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_listen_input: listen backlog exceeded for port %"U16_F"\n", tcphdr->dest));
+      return ERR_ABRT;
+    }
+#endif /* TCP_LISTEN_BACKLOG */
+    npcb = tcp_alloc(pcb->prio);
+    /* If a new PCB could not be created (probably due to lack of memory),
+       we don't do anything, but rely on the sender will retransmit the
+       SYN at a time when we have more memory available. */
+    if (npcb == NULL) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_listen_input: could not allocate PCB\n"));
+      TCP_STATS_INC(tcp.memerr);
+      return ERR_MEM;
+    }
+#if TCP_LISTEN_BACKLOG
+    pcb->accepts_pending++;
+#endif /* TCP_LISTEN_BACKLOG */
+    /* Set up the new PCB. */
+    ip_addr_set(&(npcb->local_ip), &(iphdr->dest));
+    npcb->local_port = pcb->local_port;
+    ip_addr_set(&(npcb->remote_ip), &(iphdr->src));
+    npcb->remote_port = tcphdr->src;
+    npcb->state = SYN_RCVD;
+    npcb->rcv_nxt = seqno + 1;
+    npcb->rcv_ann_right_edge = npcb->rcv_nxt;
+    npcb->snd_wnd = tcphdr->wnd;
+    npcb->ssthresh = npcb->snd_wnd;
+    npcb->snd_wl1 = seqno - 1;/* initialise to seqno-1 to force window update */
+    npcb->callback_arg = pcb->callback_arg;
+#if LWIP_CALLBACK_API
+    npcb->accept = pcb->accept;
+#endif /* LWIP_CALLBACK_API */
+    /* inherit socket options */
+    npcb->so_options = pcb->so_options & (SOF_DEBUG|SOF_DONTROUTE|SOF_KEEPALIVE|SOF_OOBINLINE|SOF_LINGER);
+    /* Register the new PCB so that we can begin receiving segments
+       for it. */
+    TCP_REG(&tcp_active_pcbs, npcb);
+
+    /* Parse any options in the SYN. */
+    tcp_parseopt(npcb);
+#if TCP_CALCULATE_EFF_SEND_MSS
+    npcb->mss = tcp_eff_send_mss(npcb->mss, &(npcb->remote_ip));
+#endif /* TCP_CALCULATE_EFF_SEND_MSS */
+
+    snmp_inc_tcppassiveopens();
+
+    /* Send a SYN|ACK together with the MSS option. */
+    rc = tcp_enqueue(npcb, NULL, 0, TCP_SYN | TCP_ACK, 0, TF_SEG_OPTS_MSS
+#if LWIP_TCP_TIMESTAMPS
+      /* and maybe include the TIMESTAMP option */
+     | (npcb->flags & TF_TIMESTAMP ? TF_SEG_OPTS_TS : 0)
+#endif
+      );
+    if (rc != ERR_OK) {
+      tcp_abandon(npcb, 0);
+      return rc;
+    }
+    return tcp_output(npcb);
+  }
+  return ERR_OK;
+}
+
+/**
+ * Called by tcp_input() when a segment arrives for a connection in
+ * TIME_WAIT.
+ *
+ * @param pcb the tcp_pcb for which a segment arrived
+ *
+ * @note the segment which arrived is saved in global variables, therefore only the pcb
+ *       involved is passed as a parameter to this function
+ */
+static err_t
+tcp_timewait_input(struct tcp_pcb *pcb)
+{
+  if (TCP_SEQ_GT(seqno + tcplen, pcb->rcv_nxt)) {
+    pcb->rcv_nxt = seqno + tcplen;
+  }
+  if (tcplen > 0) {
+    tcp_ack_now(pcb);
+  }
+  return tcp_output(pcb);
+}
+
+/**
+ * Implements the TCP state machine. Called by tcp_input. In some
+ * states tcp_receive() is called to receive data. The tcp_seg
+ * argument will be freed by the caller (tcp_input()) unless the
+ * recv_data pointer in the pcb is set.
+ *
+ * @param pcb the tcp_pcb for which a segment arrived
+ *
+ * @note the segment which arrived is saved in global variables, therefore only the pcb
+ *       involved is passed as a parameter to this function
+ */
+static err_t
+tcp_process(struct tcp_pcb *pcb)
+{
+  struct tcp_seg *rseg;
+  u8_t acceptable = 0;
+  err_t err;
+
+  err = ERR_OK;
+
+  /* Process incoming RST segments. */
+  if (flags & TCP_RST) {
+    /* First, determine if the reset is acceptable. */
+    if (pcb->state == SYN_SENT) {
+      if (ackno == pcb->snd_nxt) {
+        acceptable = 1;
+      }
+    } else {
+      if (TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt, 
+                          pcb->rcv_nxt+pcb->rcv_wnd)) {
+        acceptable = 1;
+      }
+    }
+
+    if (acceptable) {
+      LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_process: Connection RESET\n"));
+      LWIP_ASSERT("tcp_input: pcb->state != CLOSED", pcb->state != CLOSED);
+      recv_flags |= TF_RESET;
+      pcb->flags &= ~TF_ACK_DELAY;
+      return ERR_RST;
+    } else {
+      LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_process: unacceptable reset seqno %"U32_F" rcv_nxt %"U32_F"\n",
+       seqno, pcb->rcv_nxt));
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_process: unacceptable reset seqno %"U32_F" rcv_nxt %"U32_F"\n",
+       seqno, pcb->rcv_nxt));
+      return ERR_OK;
+    }
+  }
+
+  if ((flags & TCP_SYN) && (pcb->state != SYN_SENT && pcb->state != SYN_RCVD)) { 
+    /* Cope with new connection attempt after remote end crashed */
+    tcp_ack_now(pcb);
+    return ERR_OK;
+  }
+  
+  /* Update the PCB (in)activity timer. */
+  pcb->tmr = tcp_ticks;
+  pcb->keep_cnt_sent = 0;
+
+  tcp_parseopt(pcb);
+
+  /* Do different things depending on the TCP state. */
+  switch (pcb->state) {
+  case SYN_SENT:
+    LWIP_DEBUGF(TCP_INPUT_DEBUG, ("SYN-SENT: ackno %"U32_F" pcb->snd_nxt %"U32_F" unacked %"U32_F"\n", ackno,
+     pcb->snd_nxt, ntohl(pcb->unacked->tcphdr->seqno)));
+    /* received SYN ACK with expected sequence number? */
+    if ((flags & TCP_ACK) && (flags & TCP_SYN)
+        && ackno == ntohl(pcb->unacked->tcphdr->seqno) + 1) {
+      pcb->snd_buf++;
+      pcb->rcv_nxt = seqno + 1;
+      pcb->rcv_ann_right_edge = pcb->rcv_nxt;
+      pcb->lastack = ackno;
+      pcb->snd_wnd = tcphdr->wnd;
+      pcb->snd_wl1 = seqno - 1; /* initialise to seqno - 1 to force window update */
+      pcb->state = ESTABLISHED;
+
+#if TCP_CALCULATE_EFF_SEND_MSS
+      pcb->mss = tcp_eff_send_mss(pcb->mss, &(pcb->remote_ip));
+#endif /* TCP_CALCULATE_EFF_SEND_MSS */
+
+      /* Set ssthresh again after changing pcb->mss (already set in tcp_connect
+       * but for the default value of pcb->mss) */
+      pcb->ssthresh = pcb->mss * 10;
+
+      pcb->cwnd = ((pcb->cwnd == 1) ? (pcb->mss * 2) : pcb->mss);
+      LWIP_ASSERT("pcb->snd_queuelen > 0", (pcb->snd_queuelen > 0));
+      --pcb->snd_queuelen;
+      LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_process: SYN-SENT --queuelen %"U16_F"\n", (u16_t)pcb->snd_queuelen));
+      rseg = pcb->unacked;
+      pcb->unacked = rseg->next;
+
+      /* If there's nothing left to acknowledge, stop the retransmit
+         timer, otherwise reset it to start again */
+      if(pcb->unacked == NULL)
+        pcb->rtime = -1;
+      else {
+        pcb->rtime = 0;
+        pcb->nrtx = 0;
+      }
+
+      tcp_seg_free(rseg);
+
+      /* Call the user specified function to call when sucessfully
+       * connected. */
+      TCP_EVENT_CONNECTED(pcb, ERR_OK, err);
+      tcp_ack_now(pcb);
+    }
+    /* received ACK? possibly a half-open connection */
+    else if (flags & TCP_ACK) {
+      /* send a RST to bring the other side in a non-synchronized state. */
+      tcp_rst(ackno, seqno + tcplen, &(iphdr->dest), &(iphdr->src),
+        tcphdr->dest, tcphdr->src);
+    }
+    break;
+  case SYN_RCVD:
+    if (flags & TCP_ACK) {
+      /* expected ACK number? */
+      if (TCP_SEQ_BETWEEN(ackno, pcb->lastack+1, pcb->snd_nxt)) {
+        u16_t old_cwnd;
+        pcb->state = ESTABLISHED;
+        LWIP_DEBUGF(TCP_DEBUG, ("TCP connection established %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
+#if LWIP_CALLBACK_API
+        LWIP_ASSERT("pcb->accept != NULL", pcb->accept != NULL);
+#endif
+        /* Call the accept function. */
+        TCP_EVENT_ACCEPT(pcb, ERR_OK, err);
+        if (err != ERR_OK) {
+          /* If the accept function returns with an error, we abort
+           * the connection. */
+          tcp_abort(pcb);
+          return ERR_ABRT;
+        }
+        old_cwnd = pcb->cwnd;
+        /* If there was any data contained within this ACK,
+         * we'd better pass it on to the application as well. */
+        tcp_receive(pcb);
+
+        pcb->cwnd = ((old_cwnd == 1) ? (pcb->mss * 2) : pcb->mss);
+
+        if (recv_flags & TF_GOT_FIN) {
+          tcp_ack_now(pcb);
+          pcb->state = CLOSE_WAIT;
+        }
+      }
+      /* incorrect ACK number */
+      else {
+        /* send RST */
+        tcp_rst(ackno, seqno + tcplen, &(iphdr->dest), &(iphdr->src),
+                tcphdr->dest, tcphdr->src);
+      }
+    } else if ((flags & TCP_SYN) && (seqno == pcb->rcv_nxt - 1)) {
+      /* Looks like another copy of the SYN - retransmit our SYN-ACK */
+      tcp_rexmit(pcb);
+    }
+    break;
+  case CLOSE_WAIT:
+    /* FALLTHROUGH */
+  case ESTABLISHED:
+    tcp_receive(pcb);
+    if (recv_flags & TF_GOT_FIN) { /* passive close */
+      tcp_ack_now(pcb);
+      pcb->state = CLOSE_WAIT;
+    }
+    break;
+  case FIN_WAIT_1:
+    tcp_receive(pcb);
+    if (recv_flags & TF_GOT_FIN) {
+      if ((flags & TCP_ACK) && (ackno == pcb->snd_nxt)) {
+        LWIP_DEBUGF(TCP_DEBUG,
+          ("TCP connection closed %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
+        tcp_ack_now(pcb);
+        tcp_pcb_purge(pcb);
+        TCP_RMV(&tcp_active_pcbs, pcb);
+        pcb->state = TIME_WAIT;
+        TCP_REG(&tcp_tw_pcbs, pcb);
+      } else {
+        tcp_ack_now(pcb);
+        pcb->state = CLOSING;
+      }
+    } else if ((flags & TCP_ACK) && (ackno == pcb->snd_nxt)) {
+      pcb->state = FIN_WAIT_2;
+    }
+    break;
+  case FIN_WAIT_2:
+    tcp_receive(pcb);
+    if (recv_flags & TF_GOT_FIN) {
+      LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
+      tcp_ack_now(pcb);
+      tcp_pcb_purge(pcb);
+      TCP_RMV(&tcp_active_pcbs, pcb);
+      pcb->state = TIME_WAIT;
+      TCP_REG(&tcp_tw_pcbs, pcb);
+    }
+    break;
+  case CLOSING:
+    tcp_receive(pcb);
+    if (flags & TCP_ACK && ackno == pcb->snd_nxt) {
+      LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
+      tcp_pcb_purge(pcb);
+      TCP_RMV(&tcp_active_pcbs, pcb);
+      pcb->state = TIME_WAIT;
+      TCP_REG(&tcp_tw_pcbs, pcb);
+    }
+    break;
+  case LAST_ACK:
+    tcp_receive(pcb);
+    if (flags & TCP_ACK && ackno == pcb->snd_nxt) {
+      LWIP_DEBUGF(TCP_DEBUG, ("TCP connection closed %"U16_F" -> %"U16_F".\n", inseg.tcphdr->src, inseg.tcphdr->dest));
+      /* bugfix #21699: don't set pcb->state to CLOSED here or we risk leaking segments */
+      recv_flags |= TF_CLOSED;
+    }
+    break;
+  default:
+    break;
+  }
+  return ERR_OK;
+}
+
+/**
+ * Called by tcp_process. Checks if the given segment is an ACK for outstanding
+ * data, and if so frees the memory of the buffered data. Next, is places the
+ * segment on any of the receive queues (pcb->recved or pcb->ooseq). If the segment
+ * is buffered, the pbuf is referenced by pbuf_ref so that it will not be freed until
+ * i it has been removed from the buffer.
+ *
+ * If the incoming segment constitutes an ACK for a segment that was used for RTT
+ * estimation, the RTT is estimated here as well.
+ *
+ * Called from tcp_process().
+ *
+ * @return 1 if the incoming segment is the next in sequence, 0 if not
+ */
+static u8_t
+tcp_receive(struct tcp_pcb *pcb)
+{
+  struct tcp_seg *next;
+#if TCP_QUEUE_OOSEQ
+  struct tcp_seg *prev, *cseg;
+#endif
+  struct pbuf *p;
+  s32_t off;
+  s16_t m;
+  u32_t right_wnd_edge;
+  u16_t new_tot_len;
+  u8_t accepted_inseq = 0;
+
+  if (flags & TCP_ACK) {
+    right_wnd_edge = pcb->snd_wnd + pcb->snd_wl2;
+
+    /* Update window. */
+    if (TCP_SEQ_LT(pcb->snd_wl1, seqno) ||
+       (pcb->snd_wl1 == seqno && TCP_SEQ_LT(pcb->snd_wl2, ackno)) ||
+       (pcb->snd_wl2 == ackno && tcphdr->wnd > pcb->snd_wnd)) {
+      pcb->snd_wnd = tcphdr->wnd;
+      pcb->snd_wl1 = seqno;
+      pcb->snd_wl2 = ackno;
+      if (pcb->snd_wnd > 0 && pcb->persist_backoff > 0) {
+          pcb->persist_backoff = 0;
+      }
+      LWIP_DEBUGF(TCP_WND_DEBUG, ("tcp_receive: window update %"U16_F"\n", pcb->snd_wnd));
+#if TCP_WND_DEBUG
+    } else {
+      if (pcb->snd_wnd != tcphdr->wnd) {
+        LWIP_DEBUGF(TCP_WND_DEBUG, 
+                    ("tcp_receive: no window update lastack %"U32_F" ackno %"
+                     U32_F" wl1 %"U32_F" seqno %"U32_F" wl2 %"U32_F"\n",
+                     pcb->lastack, ackno, pcb->snd_wl1, seqno, pcb->snd_wl2));
+      }
+#endif /* TCP_WND_DEBUG */
+    }
+
+    if (pcb->lastack == ackno) {
+      pcb->acked = 0;
+
+      if (pcb->snd_wl2 + pcb->snd_wnd == right_wnd_edge){
+        ++pcb->dupacks;
+        if (pcb->dupacks >= 3 && pcb->unacked != NULL) {
+          if (!(pcb->flags & TF_INFR)) {
+            /* This is fast retransmit. Retransmit the first unacked segment. */
+            LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: dupacks %"U16_F" (%"U32_F"), fast retransmit %"U32_F"\n",
+                                       (u16_t)pcb->dupacks, pcb->lastack,
+                                       ntohl(pcb->unacked->tcphdr->seqno)));
+            tcp_rexmit(pcb);
+            /* Set ssthresh to max (FlightSize / 2, 2*SMSS) */
+            /*pcb->ssthresh = LWIP_MAX((pcb->snd_max -
+                                      pcb->lastack) / 2,
+                                      2 * pcb->mss);*/
+            /* Set ssthresh to half of the minimum of the current cwnd and the advertised window */
+            if (pcb->cwnd > pcb->snd_wnd)
+              pcb->ssthresh = pcb->snd_wnd / 2;
+            else
+              pcb->ssthresh = pcb->cwnd / 2;
+
+            /* The minimum value for ssthresh should be 2 MSS */
+            if (pcb->ssthresh < 2*pcb->mss) {
+              LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: The minimum value for ssthresh %"U16_F" should be min 2 mss %"U16_F"...\n", pcb->ssthresh, 2*pcb->mss));
+              pcb->ssthresh = 2*pcb->mss;
+            }
+
+            pcb->cwnd = pcb->ssthresh + 3 * pcb->mss;
+            pcb->flags |= TF_INFR;
+          } else {
+            /* Inflate the congestion window, but not if it means that
+               the value overflows. */
+            if ((u16_t)(pcb->cwnd + pcb->mss) > pcb->cwnd) {
+              pcb->cwnd += pcb->mss;
+            }
+          }
+        }
+      } else {
+        LWIP_DEBUGF(TCP_FR_DEBUG, ("tcp_receive: dupack averted %"U32_F" %"U32_F"\n",
+                                   pcb->snd_wl2 + pcb->snd_wnd, right_wnd_edge));
+      }
+    } else if (TCP_SEQ_BETWEEN(ackno, pcb->lastack+1, pcb->snd_nxt)){
+      /* We come here when the ACK acknowledges new data. */
+      
+      /* Reset the "IN Fast Retransmit" flag, since we are no longer
+         in fast retransmit. Also reset the congestion window to the
+         slow start threshold. */
+      if (pcb->flags & TF_INFR) {
+        pcb->flags &= ~TF_INFR;
+        pcb->cwnd = pcb->ssthresh;
+      }
+
+      /* Reset the number of retransmissions. */
+      pcb->nrtx = 0;
+
+      /* Reset the retransmission time-out. */
+      pcb->rto = (pcb->sa >> 3) + pcb->sv;
+
+      /* Update the send buffer space. Diff between the two can never exceed 64K? */
+      pcb->acked = (u16_t)(ackno - pcb->lastack);
+
+      pcb->snd_buf += pcb->acked;
+
+      /* Reset the fast retransmit variables. */
+      pcb->dupacks = 0;
+      pcb->lastack = ackno;
+
+      /* Update the congestion control variables (cwnd and
+         ssthresh). */
+      if (pcb->state >= ESTABLISHED) {
+        if (pcb->cwnd < pcb->ssthresh) {
+          if ((u16_t)(pcb->cwnd + pcb->mss) > pcb->cwnd) {
+            pcb->cwnd += pcb->mss;
+          }
+          LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_receive: slow start cwnd %"U16_F"\n", pcb->cwnd));
+        } else {
+          u16_t new_cwnd = (pcb->cwnd + pcb->mss * pcb->mss / pcb->cwnd);
+          if (new_cwnd > pcb->cwnd) {
+            pcb->cwnd = new_cwnd;
+          }
+          LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_receive: congestion avoidance cwnd %"U16_F"\n", pcb->cwnd));
+        }
+      }
+      LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: ACK for %"U32_F", unacked->seqno %"U32_F":%"U32_F"\n",
+                                    ackno,
+                                    pcb->unacked != NULL?
+                                    ntohl(pcb->unacked->tcphdr->seqno): 0,
+                                    pcb->unacked != NULL?
+                                    ntohl(pcb->unacked->tcphdr->seqno) + TCP_TCPLEN(pcb->unacked): 0));
+
+      /* Remove segment from the unacknowledged list if the incoming
+         ACK acknowlegdes them. */
+      while (pcb->unacked != NULL &&
+             TCP_SEQ_LEQ(ntohl(pcb->unacked->tcphdr->seqno) +
+                         TCP_TCPLEN(pcb->unacked), ackno)) {
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: removing %"U32_F":%"U32_F" from pcb->unacked\n",
+                                      ntohl(pcb->unacked->tcphdr->seqno),
+                                      ntohl(pcb->unacked->tcphdr->seqno) +
+                                      TCP_TCPLEN(pcb->unacked)));
+
+        next = pcb->unacked;
+        pcb->unacked = pcb->unacked->next;
+
+        LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_receive: queuelen %"U16_F" ... ", (u16_t)pcb->snd_queuelen));
+        LWIP_ASSERT("pcb->snd_queuelen >= pbuf_clen(next->p)", (pcb->snd_queuelen >= pbuf_clen(next->p)));
+        pcb->snd_queuelen -= pbuf_clen(next->p);
+        tcp_seg_free(next);
+
+        LWIP_DEBUGF(TCP_QLEN_DEBUG, ("%"U16_F" (after freeing unacked)\n", (u16_t)pcb->snd_queuelen));
+        if (pcb->snd_queuelen != 0) {
+          LWIP_ASSERT("tcp_receive: valid queue length", pcb->unacked != NULL ||
+                      pcb->unsent != NULL);
+        }
+      }
+
+      /* If there's nothing left to acknowledge, stop the retransmit
+         timer, otherwise reset it to start again */
+      if(pcb->unacked == NULL)
+        pcb->rtime = -1;
+      else
+        pcb->rtime = 0;
+
+      pcb->polltmr = 0;
+    } else {
+      /* Fix bug bug #21582: out of sequence ACK, didn't really ack anything */
+      pcb->acked = 0;
+    }
+
+    /* We go through the ->unsent list to see if any of the segments
+       on the list are acknowledged by the ACK. This may seem
+       strange since an "unsent" segment shouldn't be acked. The
+       rationale is that lwIP puts all outstanding segments on the
+       ->unsent list after a retransmission, so these segments may
+       in fact have been sent once. */
+    while (pcb->unsent != NULL &&
+           TCP_SEQ_BETWEEN(ackno, ntohl(pcb->unsent->tcphdr->seqno) + 
+                           TCP_TCPLEN(pcb->unsent), pcb->snd_nxt)) {
+      LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: removing %"U32_F":%"U32_F" from pcb->unsent\n",
+                                    ntohl(pcb->unsent->tcphdr->seqno), ntohl(pcb->unsent->tcphdr->seqno) +
+                                    TCP_TCPLEN(pcb->unsent)));
+
+      next = pcb->unsent;
+      pcb->unsent = pcb->unsent->next;
+      LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_receive: queuelen %"U16_F" ... ", (u16_t)pcb->snd_queuelen));
+      LWIP_ASSERT("pcb->snd_queuelen >= pbuf_clen(next->p)", (pcb->snd_queuelen >= pbuf_clen(next->p)));
+      pcb->snd_queuelen -= pbuf_clen(next->p);
+      tcp_seg_free(next);
+      LWIP_DEBUGF(TCP_QLEN_DEBUG, ("%"U16_F" (after freeing unsent)\n", (u16_t)pcb->snd_queuelen));
+      if (pcb->snd_queuelen != 0) {
+        LWIP_ASSERT("tcp_receive: valid queue length",
+          pcb->unacked != NULL || pcb->unsent != NULL);
+      }
+    }
+    /* End of ACK for new data processing. */
+
+    LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: pcb->rttest %"U32_F" rtseq %"U32_F" ackno %"U32_F"\n",
+                                pcb->rttest, pcb->rtseq, ackno));
+
+    /* RTT estimation calculations. This is done by checking if the
+       incoming segment acknowledges the segment we use to take a
+       round-trip time measurement. */
+    if (pcb->rttest && TCP_SEQ_LT(pcb->rtseq, ackno)) {
+      /* diff between this shouldn't exceed 32K since this are tcp timer ticks
+         and a round-trip shouldn't be that long... */
+      m = (s16_t)(tcp_ticks - pcb->rttest);
+
+      LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: experienced rtt %"U16_F" ticks (%"U16_F" msec).\n",
+                                  m, m * TCP_SLOW_INTERVAL));
+
+      /* This is taken directly from VJs original code in his paper */
+      m = m - (pcb->sa >> 3);
+      pcb->sa += m;
+      if (m < 0) {
+        m = -m;
+      }
+      m = m - (pcb->sv >> 2);
+      pcb->sv += m;
+      pcb->rto = (pcb->sa >> 3) + pcb->sv;
+
+      LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_receive: RTO %"U16_F" (%"U16_F" milliseconds)\n",
+                                  pcb->rto, pcb->rto * TCP_SLOW_INTERVAL));
+
+      pcb->rttest = 0;
+    }
+  }
+
+  /* If the incoming segment contains data, we must process it
+     further. */
+  if (tcplen > 0) {
+    /* This code basically does three things:
+
+    +) If the incoming segment contains data that is the next
+    in-sequence data, this data is passed to the application. This
+    might involve trimming the first edge of the data. The rcv_nxt
+    variable and the advertised window are adjusted.
+
+    +) If the incoming segment has data that is above the next
+    sequence number expected (->rcv_nxt), the segment is placed on
+    the ->ooseq queue. This is done by finding the appropriate
+    place in the ->ooseq queue (which is ordered by sequence
+    number) and trim the segment in both ends if needed. An
+    immediate ACK is sent to indicate that we received an
+    out-of-sequence segment.
+
+    +) Finally, we check if the first segment on the ->ooseq queue
+    now is in sequence (i.e., if rcv_nxt >= ooseq->seqno). If
+    rcv_nxt > ooseq->seqno, we must trim the first edge of the
+    segment on ->ooseq before we adjust rcv_nxt. The data in the
+    segments that are now on sequence are chained onto the
+    incoming segment so that we only need to call the application
+    once.
+    */
+
+    /* First, we check if we must trim the first edge. We have to do
+       this if the sequence number of the incoming segment is less
+       than rcv_nxt, and the sequence number plus the length of the
+       segment is larger than rcv_nxt. */
+    /*    if (TCP_SEQ_LT(seqno, pcb->rcv_nxt)){
+          if (TCP_SEQ_LT(pcb->rcv_nxt, seqno + tcplen)) {*/
+    if (TCP_SEQ_BETWEEN(pcb->rcv_nxt, seqno + 1, seqno + tcplen - 1)){
+      /* Trimming the first edge is done by pushing the payload
+         pointer in the pbuf downwards. This is somewhat tricky since
+         we do not want to discard the full contents of the pbuf up to
+         the new starting point of the data since we have to keep the
+         TCP header which is present in the first pbuf in the chain.
+
+         What is done is really quite a nasty hack: the first pbuf in
+         the pbuf chain is pointed to by inseg.p. Since we need to be
+         able to deallocate the whole pbuf, we cannot change this
+         inseg.p pointer to point to any of the later pbufs in the
+         chain. Instead, we point the ->payload pointer in the first
+         pbuf to data in one of the later pbufs. We also set the
+         inseg.data pointer to point to the right place. This way, the
+         ->p pointer will still point to the first pbuf, but the
+         ->p->payload pointer will point to data in another pbuf.
+
+         After we are done with adjusting the pbuf pointers we must
+         adjust the ->data pointer in the seg and the segment
+         length.*/
+
+      off = pcb->rcv_nxt - seqno;
+      p = inseg.p;
+      LWIP_ASSERT("inseg.p != NULL", inseg.p);
+      LWIP_ASSERT("insane offset!", (off < 0x7fff));
+      if (inseg.p->len < off) {
+        LWIP_ASSERT("pbuf too short!", (((s32_t)inseg.p->tot_len) >= off));
+        new_tot_len = (u16_t)(inseg.p->tot_len - off);
+        while (p->len < off) {
+          off -= p->len;
+          /* KJM following line changed (with addition of new_tot_len var)
+             to fix bug #9076
+             inseg.p->tot_len -= p->len; */
+          p->tot_len = new_tot_len;
+          p->len = 0;
+          p = p->next;
+        }
+        if(pbuf_header(p, (s16_t)-off)) {
+          /* Do we need to cope with this failing?  Assert for now */
+          LWIP_ASSERT("pbuf_header failed", 0);
+        }
+      } else {
+        if(pbuf_header(inseg.p, (s16_t)-off)) {
+          /* Do we need to cope with this failing?  Assert for now */
+          LWIP_ASSERT("pbuf_header failed", 0);
+        }
+      }
+      /* KJM following line changed to use p->payload rather than inseg->p->payload
+         to fix bug #9076 */
+      inseg.dataptr = p->payload;
+      inseg.len -= (u16_t)(pcb->rcv_nxt - seqno);
+      inseg.tcphdr->seqno = seqno = pcb->rcv_nxt;
+    }
+    else {
+      if (TCP_SEQ_LT(seqno, pcb->rcv_nxt)){
+        /* the whole segment is < rcv_nxt */
+        /* must be a duplicate of a packet that has already been correctly handled */
+
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: duplicate seqno %"U32_F"\n", seqno));
+        tcp_ack_now(pcb);
+      }
+    }
+
+    /* The sequence number must be within the window (above rcv_nxt
+       and below rcv_nxt + rcv_wnd) in order to be further
+       processed. */
+    if (TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt, 
+                        pcb->rcv_nxt + pcb->rcv_wnd - 1)){
+      if (pcb->rcv_nxt == seqno) {
+        accepted_inseq = 1; 
+        /* The incoming segment is the next in sequence. We check if
+           we have to trim the end of the segment and update rcv_nxt
+           and pass the data to the application. */
+        tcplen = TCP_TCPLEN(&inseg);
+
+        if (tcplen > pcb->rcv_wnd) {
+          LWIP_DEBUGF(TCP_INPUT_DEBUG, 
+                      ("tcp_receive: other end overran receive window"
+                       "seqno %"U32_F" len %"U32_F" right edge %"U32_F"\n",
+                       seqno, tcplen, pcb->rcv_nxt + pcb->rcv_wnd));
+          if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) {
+            /* Must remove the FIN from the header as we're trimming 
+             * that byte of sequence-space from the packet */
+            TCPH_FLAGS_SET(inseg.tcphdr, TCPH_FLAGS(inseg.tcphdr) &~ TCP_FIN);
+          }
+          /* Adjust length of segment to fit in the window. */
+          inseg.len = pcb->rcv_wnd;
+          if (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) {
+            inseg.len -= 1;
+          }
+          pbuf_realloc(inseg.p, inseg.len);
+          tcplen = TCP_TCPLEN(&inseg);
+          LWIP_ASSERT("tcp_receive: segment not trimmed correctly to rcv_wnd\n",
+                      (seqno + tcplen) == (pcb->rcv_nxt + pcb->rcv_wnd));
+        }
+#if TCP_QUEUE_OOSEQ
+        if (pcb->ooseq != NULL) {
+          if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) {
+            LWIP_DEBUGF(TCP_INPUT_DEBUG, 
+                        ("tcp_receive: received in-order FIN, binning ooseq queue\n"));
+            /* Received in-order FIN means anything that was received
+             * out of order must now have been received in-order, so
+             * bin the ooseq queue */
+            while (pcb->ooseq != NULL) {
+              struct tcp_seg *old_ooseq = pcb->ooseq;
+              pcb->ooseq = pcb->ooseq->next;
+              memp_free(MEMP_TCP_SEG, old_ooseq);
+            }               
+          } else if (TCP_SEQ_LEQ(pcb->ooseq->tcphdr->seqno, seqno + tcplen)) {
+            if (pcb->ooseq->len > 0) {
+              /* We have to trim the second edge of the incoming segment. */
+              LWIP_ASSERT("tcp_receive: trimmed segment would have zero length\n",
+                          TCP_SEQ_GT(pcb->ooseq->tcphdr->seqno, seqno));
+              /* FIN in inseg already handled by dropping whole ooseq queue */
+              inseg.len = (u16_t)(pcb->ooseq->tcphdr->seqno - seqno);
+              if (TCPH_FLAGS(inseg.tcphdr) & TCP_SYN) {
+                inseg.len -= 1;
+              }
+              pbuf_realloc(inseg.p, inseg.len);
+              tcplen = TCP_TCPLEN(&inseg);
+              LWIP_ASSERT("tcp_receive: segment not trimmed correctly to ooseq queue\n",
+                          (seqno + tcplen) == pcb->ooseq->tcphdr->seqno);
+            } else {
+              /* does the ooseq segment contain only flags that are in inseg also? */
+              if ((TCPH_FLAGS(inseg.tcphdr) & (TCP_FIN|TCP_SYN)) ==
+                  (TCPH_FLAGS(pcb->ooseq->tcphdr) & (TCP_FIN|TCP_SYN))) {
+                struct tcp_seg *old_ooseq = pcb->ooseq;
+                pcb->ooseq = pcb->ooseq->next;
+                memp_free(MEMP_TCP_SEG, old_ooseq);
+              }
+            }
+          }
+        }
+#endif /* TCP_QUEUE_OOSEQ */
+
+        pcb->rcv_nxt = seqno + tcplen;
+
+        /* Update the receiver's (our) window. */
+        LWIP_ASSERT("tcp_receive: tcplen > rcv_wnd\n", pcb->rcv_wnd >= tcplen);
+        pcb->rcv_wnd -= tcplen;
+
+        tcp_update_rcv_ann_wnd(pcb);
+
+        /* If there is data in the segment, we make preparations to
+           pass this up to the application. The ->recv_data variable
+           is used for holding the pbuf that goes to the
+           application. The code for reassembling out-of-sequence data
+           chains its data on this pbuf as well.
+
+           If the segment was a FIN, we set the TF_GOT_FIN flag that will
+           be used to indicate to the application that the remote side has
+           closed its end of the connection. */
+        if (inseg.p->tot_len > 0) {
+          recv_data = inseg.p;
+          /* Since this pbuf now is the responsibility of the
+             application, we delete our reference to it so that we won't
+             (mistakingly) deallocate it. */
+          inseg.p = NULL;
+        }
+        if (TCPH_FLAGS(inseg.tcphdr) & TCP_FIN) {
+          LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: received FIN.\n"));
+          recv_flags |= TF_GOT_FIN;
+        }
+
+#if TCP_QUEUE_OOSEQ
+        /* We now check if we have segments on the ->ooseq queue that
+           is now in sequence. */
+        while (pcb->ooseq != NULL &&
+               pcb->ooseq->tcphdr->seqno == pcb->rcv_nxt) {
+
+          cseg = pcb->ooseq;
+          seqno = pcb->ooseq->tcphdr->seqno;
+
+          pcb->rcv_nxt += TCP_TCPLEN(cseg);
+          LWIP_ASSERT("tcp_receive: ooseq tcplen > rcv_wnd\n",
+                      pcb->rcv_wnd >= TCP_TCPLEN(cseg));
+          pcb->rcv_wnd -= TCP_TCPLEN(cseg);
+
+          tcp_update_rcv_ann_wnd(pcb);
+
+          if (cseg->p->tot_len > 0) {
+            /* Chain this pbuf onto the pbuf that we will pass to
+               the application. */
+            if (recv_data) {
+              pbuf_cat(recv_data, cseg->p);
+            } else {
+              recv_data = cseg->p;
+            }
+            cseg->p = NULL;
+          }
+          if (TCPH_FLAGS(cseg->tcphdr) & TCP_FIN) {
+            LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_receive: dequeued FIN.\n"));
+            recv_flags |= TF_GOT_FIN;
+            if (pcb->state == ESTABLISHED) { /* force passive close or we can move to active close */
+              pcb->state = CLOSE_WAIT;
+            } 
+          }
+
+
+          pcb->ooseq = cseg->next;
+          tcp_seg_free(cseg);
+        }
+#endif /* TCP_QUEUE_OOSEQ */
+
+
+        /* Acknowledge the segment(s). */
+        tcp_ack(pcb);
+
+      } else {
+        /* We get here if the incoming segment is out-of-sequence. */
+        tcp_ack_now(pcb);
+#if TCP_QUEUE_OOSEQ
+        /* We queue the segment on the ->ooseq queue. */
+        if (pcb->ooseq == NULL) {
+          pcb->ooseq = tcp_seg_copy(&inseg);
+        } else {
+          /* If the queue is not empty, we walk through the queue and
+             try to find a place where the sequence number of the
+             incoming segment is between the sequence numbers of the
+             previous and the next segment on the ->ooseq queue. That is
+             the place where we put the incoming segment. If needed, we
+             trim the second edges of the previous and the incoming
+             segment so that it will fit into the sequence.
+
+             If the incoming segment has the same sequence number as a
+             segment on the ->ooseq queue, we discard the segment that
+             contains less data. */
+
+          prev = NULL;
+          for(next = pcb->ooseq; next != NULL; next = next->next) {
+            if (seqno == next->tcphdr->seqno) {
+              /* The sequence number of the incoming segment is the
+                 same as the sequence number of the segment on
+                 ->ooseq. We check the lengths to see which one to
+                 discard. */
+              if (inseg.len > next->len) {
+                /* The incoming segment is larger than the old
+                   segment. We replace the old segment with the new
+                   one. */
+                cseg = tcp_seg_copy(&inseg);
+                if (cseg != NULL) {
+                  cseg->next = next->next;
+                  if (prev != NULL) {
+                    prev->next = cseg;
+                  } else {
+                    pcb->ooseq = cseg;
+                  }
+                  tcp_seg_free(next);
+                  if (cseg->next != NULL) {
+                    next = cseg->next;
+                    if (TCP_SEQ_GT(seqno + cseg->len, next->tcphdr->seqno)) {
+                      /* We need to trim the incoming segment. */
+                      cseg->len = (u16_t)(next->tcphdr->seqno - seqno);
+                      pbuf_realloc(cseg->p, cseg->len);
+                    }
+                  }
+                }
+                break;
+              } else {
+                /* Either the lenghts are the same or the incoming
+                   segment was smaller than the old one; in either
+                   case, we ditch the incoming segment. */
+                break;
+              }
+            } else {
+              if (prev == NULL) {
+                if (TCP_SEQ_LT(seqno, next->tcphdr->seqno)) {
+                  /* The sequence number of the incoming segment is lower
+                     than the sequence number of the first segment on the
+                     queue. We put the incoming segment first on the
+                     queue. */
+
+                  if (TCP_SEQ_GT(seqno + inseg.len, next->tcphdr->seqno)) {
+                    /* We need to trim the incoming segment. */
+                    inseg.len = (u16_t)(next->tcphdr->seqno - seqno);
+                    pbuf_realloc(inseg.p, inseg.len);
+                  }
+                  cseg = tcp_seg_copy(&inseg);
+                  if (cseg != NULL) {
+                    cseg->next = next;
+                    pcb->ooseq = cseg;
+                  }
+                  break;
+                }
+              } else 
+                /*if (TCP_SEQ_LT(prev->tcphdr->seqno, seqno) &&
+                  TCP_SEQ_LT(seqno, next->tcphdr->seqno)) {*/
+                if(TCP_SEQ_BETWEEN(seqno, prev->tcphdr->seqno+1, next->tcphdr->seqno-1)){
+                /* The sequence number of the incoming segment is in
+                   between the sequence numbers of the previous and
+                   the next segment on ->ooseq. We trim and insert the
+                   incoming segment and trim the previous segment, if
+                   needed. */
+                if (TCP_SEQ_GT(seqno + inseg.len, next->tcphdr->seqno)) {
+                  /* We need to trim the incoming segment. */
+                  inseg.len = (u16_t)(next->tcphdr->seqno - seqno);
+                  pbuf_realloc(inseg.p, inseg.len);
+                }
+
+                cseg = tcp_seg_copy(&inseg);
+                if (cseg != NULL) {
+                  cseg->next = next;
+                  prev->next = cseg;
+                  if (TCP_SEQ_GT(prev->tcphdr->seqno + prev->len, seqno)) {
+                    /* We need to trim the prev segment. */
+                    prev->len = (u16_t)(seqno - prev->tcphdr->seqno);
+                    pbuf_realloc(prev->p, prev->len);
+                  }
+                }
+                break;
+              }
+              /* If the "next" segment is the last segment on the
+                 ooseq queue, we add the incoming segment to the end
+                 of the list. */
+              if (next->next == NULL &&
+                  TCP_SEQ_GT(seqno, next->tcphdr->seqno)) {
+                next->next = tcp_seg_copy(&inseg);
+                if (next->next != NULL) {
+                  if (TCP_SEQ_GT(next->tcphdr->seqno + next->len, seqno)) {
+                    /* We need to trim the last segment. */
+                    next->len = (u16_t)(seqno - next->tcphdr->seqno);
+                    pbuf_realloc(next->p, next->len);
+                  }
+                }
+                break;
+              }
+            }
+            prev = next;
+          }
+        }
+#endif /* TCP_QUEUE_OOSEQ */
+
+      }
+    } else {
+      tcp_ack_now(pcb);
+    }
+  } else {
+    /* Segments with length 0 is taken care of here. Segments that
+       fall out of the window are ACKed. */
+    /*if (TCP_SEQ_GT(pcb->rcv_nxt, seqno) ||
+      TCP_SEQ_GEQ(seqno, pcb->rcv_nxt + pcb->rcv_wnd)) {*/
+    if(!TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt, pcb->rcv_nxt + pcb->rcv_wnd-1)){
+      tcp_ack_now(pcb);
+    }
+  }
+  return accepted_inseq;
+}
+
+/**
+ * Parses the options contained in the incoming segment. 
+ *
+ * Called from tcp_listen_input() and tcp_process().
+ * Currently, only the MSS option is supported!
+ *
+ * @param pcb the tcp_pcb for which a segment arrived
+ */
+static void
+tcp_parseopt(struct tcp_pcb *pcb)
+{
+  u16_t c, max_c;
+  u16_t mss;
+  u8_t *opts, opt;
+#if LWIP_TCP_TIMESTAMPS
+  u32_t tsval;
+#endif
+
+  opts = (u8_t *)tcphdr + TCP_HLEN;
+
+  /* Parse the TCP MSS option, if present. */
+  if(TCPH_HDRLEN(tcphdr) > 0x5) {
+    max_c = (TCPH_HDRLEN(tcphdr) - 5) << 2;
+    for (c = 0; c < max_c; ) {
+      opt = opts[c];
+      switch (opt) {
+      case 0x00:
+        /* End of options. */
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: EOL\n"));
+        return;
+      case 0x01:
+        /* NOP option. */
+        ++c;
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: NOP\n"));
+        break;
+      case 0x02:
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: MSS\n"));
+        if (opts[c + 1] != 0x04 || c + 0x04 > max_c) {
+          /* Bad length */
+          LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n"));
+          return;
+        }
+        /* An MSS option with the right option length. */
+        mss = (opts[c + 2] << 8) | opts[c + 3];
+        /* Limit the mss to the configured TCP_MSS and prevent division by zero */
+        pcb->mss = ((mss > TCP_MSS) || (mss == 0)) ? TCP_MSS : mss;
+        /* Advance to next option */
+        c += 0x04;
+        break;
+#if LWIP_TCP_TIMESTAMPS
+      case 0x08:
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: TS\n"));
+        if (opts[c + 1] != 0x0A || c + 0x0A > max_c) {
+          /* Bad length */
+          LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n"));
+          return;
+        }
+        /* TCP timestamp option with valid length */
+        tsval = (opts[c+2]) | (opts[c+3] << 8) | 
+          (opts[c+4] << 16) | (opts[c+5] << 24);
+        if (flags & TCP_SYN) {
+          pcb->ts_recent = ntohl(tsval);
+          pcb->flags |= TF_TIMESTAMP;
+        } else if (TCP_SEQ_BETWEEN(pcb->ts_lastacksent, seqno, seqno+tcplen)) {
+          pcb->ts_recent = ntohl(tsval);
+        }
+        /* Advance to next option */
+        c += 0x0A;
+        break;
+#endif
+      default:
+        LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: other\n"));
+        if (opts[c + 1] == 0) {
+          LWIP_DEBUGF(TCP_INPUT_DEBUG, ("tcp_parseopt: bad length\n"));
+          /* If the length field is zero, the options are malformed
+             and we don't process them further. */
+          return;
+        }
+        /* All other options have a length field, so that we easily
+           can skip past them. */
+        c += opts[c + 1];
+      }
+    }
+  }
+}
+
+#endif /* LWIP_TCP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/tcp_out.c b/firmware/x300/lwip/lwip-1.3.1/src/core/tcp_out.c
new file mode 100644
index 000000000..ca72d9dcc
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/tcp_out.c
@@ -0,0 +1,981 @@
+/**
+ * @file
+ * Transmission Control Protocol, outgoing traffic
+ *
+ * The output functions of TCP.
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/tcp.h"
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+#include "lwip/sys.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+
+#include <string.h>
+
+/* Forward declarations.*/
+static void tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb);
+
+static struct tcp_hdr *
+tcp_output_set_header(struct tcp_pcb *pcb, struct pbuf *p, int optlen,
+                      u32_t seqno_be /* already in network byte order */)
+{
+  struct tcp_hdr *tcphdr = p->payload;
+  tcphdr->src = htons(pcb->local_port);
+  tcphdr->dest = htons(pcb->remote_port);
+  tcphdr->seqno = seqno_be;
+  tcphdr->ackno = htonl(pcb->rcv_nxt);
+  TCPH_FLAGS_SET(tcphdr, TCP_ACK);
+  tcphdr->wnd = htons(pcb->rcv_ann_wnd);
+  tcphdr->urgp = 0;
+  TCPH_HDRLEN_SET(tcphdr, (5 + optlen / 4));
+  tcphdr->chksum = 0;
+
+  /* If we're sending a packet, update the announced right window edge */
+  pcb->rcv_ann_right_edge = pcb->rcv_nxt + pcb->rcv_ann_wnd;
+
+  return tcphdr;
+}
+
+/**
+ * Called by tcp_close() to send a segment including flags but not data.
+ *
+ * @param pcb the tcp_pcb over which to send a segment
+ * @param flags the flags to set in the segment header
+ * @return ERR_OK if sent, another err_t otherwise
+ */
+err_t
+tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags)
+{
+  /* no data, no length, flags, copy=1, no optdata */
+  return tcp_enqueue(pcb, NULL, 0, flags, TCP_WRITE_FLAG_COPY, 0);
+}
+
+/**
+ * Write data for sending (but does not send it immediately).
+ *
+ * It waits in the expectation of more data being sent soon (as
+ * it can send them more efficiently by combining them together).
+ * To prompt the system to send data now, call tcp_output() after
+ * calling tcp_write().
+ * 
+ * @param pcb Protocol control block of the TCP connection to enqueue data for.
+ * @param data pointer to the data to send
+ * @param len length (in bytes) of the data to send
+ * @param apiflags combination of following flags :
+ * - TCP_WRITE_FLAG_COPY (0x01) data will be copied into memory belonging to the stack
+ * - TCP_WRITE_FLAG_MORE (0x02) for TCP connection, PSH flag will be set on last segment sent,
+ * @return ERR_OK if enqueued, another err_t on error
+ * 
+ * @see tcp_write()
+ */
+err_t
+tcp_write(struct tcp_pcb *pcb, const void *data, u16_t len, u8_t apiflags)
+{
+  LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_write(pcb=%p, data=%p, len=%"U16_F", apiflags=%"U16_F")\n", (void *)pcb,
+    data, len, (u16_t)apiflags));
+  /* connection is in valid state for data transmission? */
+  if (pcb->state == ESTABLISHED ||
+     pcb->state == CLOSE_WAIT ||
+     pcb->state == SYN_SENT ||
+     pcb->state == SYN_RCVD) {
+    if (len > 0) {
+#if LWIP_TCP_TIMESTAMPS
+      return tcp_enqueue(pcb, (void *)data, len, 0, apiflags, 
+                         pcb->flags & TF_TIMESTAMP ? TF_SEG_OPTS_TS : 0);
+#else
+      return tcp_enqueue(pcb, (void *)data, len, 0, apiflags, 0);
+#endif
+    }
+    return ERR_OK;
+  } else {
+    LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_STATE | 3, ("tcp_write() called in invalid state\n"));
+    return ERR_CONN;
+  }
+}
+
+/**
+ * Enqueue data and/or TCP options for transmission
+ *
+ * Called by tcp_connect(), tcp_listen_input(), tcp_send_ctrl() and tcp_write().
+ *
+ * @param pcb Protocol control block for the TCP connection to enqueue data for.
+ * @param arg Pointer to the data to be enqueued for sending.
+ * @param len Data length in bytes
+ * @param flags tcp header flags to set in the outgoing segment
+ * @param apiflags combination of following flags :
+ * - TCP_WRITE_FLAG_COPY (0x01) data will be copied into memory belonging to the stack
+ * - TCP_WRITE_FLAG_MORE (0x02) for TCP connection, PSH flag will be set on last segment sent,
+ * @param optflags options to include in segment later on (see definition of struct tcp_seg)
+ */
+err_t
+tcp_enqueue(struct tcp_pcb *pcb, void *arg, u16_t len,
+            u8_t flags, u8_t apiflags, u8_t optflags)
+{
+  struct pbuf *p;
+  struct tcp_seg *seg, *useg, *queue;
+  u32_t seqno;
+  u16_t left, seglen;
+  void *ptr;
+  u16_t queuelen;
+  u8_t optlen;
+
+  LWIP_DEBUGF(TCP_OUTPUT_DEBUG, 
+              ("tcp_enqueue(pcb=%p, arg=%p, len=%"U16_F", flags=%"X16_F", apiflags=%"U16_F")\n",
+               (void *)pcb, arg, len, (u16_t)flags, (u16_t)apiflags));
+  LWIP_ERROR("tcp_enqueue: packet needs payload, options, or SYN/FIN (programmer violates API)",
+             ((len != 0) || (optflags != 0) || ((flags & (TCP_SYN | TCP_FIN)) != 0)),
+             return ERR_ARG;);
+  LWIP_ERROR("tcp_enqueue: len != 0 || arg == NULL (programmer violates API)", 
+             ((len != 0) || (arg == NULL)), return ERR_ARG;);
+
+  /* fail on too much data */
+  if (len > pcb->snd_buf) {
+    LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 3, ("tcp_enqueue: too much data (len=%"U16_F" > snd_buf=%"U16_F")\n", len, pcb->snd_buf));
+    pcb->flags |= TF_NAGLEMEMERR;
+    return ERR_MEM;
+  }
+  left = len;
+  ptr = arg;
+
+  optlen = LWIP_TCP_OPT_LENGTH(optflags);
+
+  /* seqno will be the sequence number of the first segment enqueued
+   * by the call to this function. */
+  seqno = pcb->snd_lbb;
+
+  LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue: queuelen: %"U16_F"\n", (u16_t)pcb->snd_queuelen));
+
+  /* If total number of pbufs on the unsent/unacked queues exceeds the
+   * configured maximum, return an error */
+  queuelen = pcb->snd_queuelen;
+  /* check for configured max queuelen and possible overflow */
+  if ((queuelen >= TCP_SND_QUEUELEN) || (queuelen > TCP_SNDQUEUELEN_OVERFLOW)) {
+    LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 3, ("tcp_enqueue: too long queue %"U16_F" (max %"U16_F")\n", queuelen, TCP_SND_QUEUELEN));
+    TCP_STATS_INC(tcp.memerr);
+    pcb->flags |= TF_NAGLEMEMERR;
+    return ERR_MEM;
+  }
+  if (queuelen != 0) {
+    LWIP_ASSERT("tcp_enqueue: pbufs on queue => at least one queue non-empty",
+      pcb->unacked != NULL || pcb->unsent != NULL);
+  } else {
+    LWIP_ASSERT("tcp_enqueue: no pbufs on queue => both queues empty",
+      pcb->unacked == NULL && pcb->unsent == NULL);
+  }
+
+  /* First, break up the data into segments and tuck them together in
+   * the local "queue" variable. */
+  useg = queue = seg = NULL;
+  seglen = 0;
+  while (queue == NULL || left > 0) {
+    /* The segment length (including options) should be at most the MSS */
+    seglen = left > (pcb->mss - optlen) ? (pcb->mss - optlen) : left;
+
+    /* Allocate memory for tcp_seg, and fill in fields. */
+    seg = memp_malloc(MEMP_TCP_SEG);
+    if (seg == NULL) {
+      LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, 
+                  ("tcp_enqueue: could not allocate memory for tcp_seg\n"));
+      goto memerr;
+    }
+    seg->next = NULL;
+    seg->p = NULL;
+
+    /* first segment of to-be-queued data? */
+    if (queue == NULL) {
+      queue = seg;
+    }
+    /* subsequent segments of to-be-queued data */
+    else {
+      /* Attach the segment to the end of the queued segments */
+      LWIP_ASSERT("useg != NULL", useg != NULL);
+      useg->next = seg;
+    }
+    /* remember last segment of to-be-queued data for next iteration */
+    useg = seg;
+
+    /* If copy is set, memory should be allocated
+     * and data copied into pbuf, otherwise data comes from
+     * ROM or other static memory, and need not be copied.  */
+    if (apiflags & TCP_WRITE_FLAG_COPY) {
+      if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, seglen + optlen, PBUF_RAM)) == NULL) {
+        LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, 
+                    ("tcp_enqueue : could not allocate memory for pbuf copy size %"U16_F"\n", seglen));
+        goto memerr;
+      }
+      LWIP_ASSERT("check that first pbuf can hold the complete seglen",
+                  (seg->p->len >= seglen + optlen));
+      queuelen += pbuf_clen(seg->p);
+      if (arg != NULL) {
+        MEMCPY((char *)seg->p->payload + optlen, ptr, seglen);
+      }
+      seg->dataptr = seg->p->payload;
+    }
+    /* do not copy data */
+    else {
+      /* First, allocate a pbuf for the headers. */
+      if ((seg->p = pbuf_alloc(PBUF_TRANSPORT, optlen, PBUF_RAM)) == NULL) {
+        LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, 
+                    ("tcp_enqueue: could not allocate memory for header pbuf\n"));
+        goto memerr;
+      }
+      queuelen += pbuf_clen(seg->p);
+
+      /* Second, allocate a pbuf for holding the data.
+       * since the referenced data is available at least until it is sent out on the
+       * link (as it has to be ACKed by the remote party) we can safely use PBUF_ROM
+       * instead of PBUF_REF here.
+       */
+      if (left > 0) {
+        if ((p = pbuf_alloc(PBUF_RAW, seglen, PBUF_ROM)) == NULL) {
+          /* If allocation fails, we have to deallocate the header pbuf as well. */
+          pbuf_free(seg->p);
+          seg->p = NULL;
+          LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, 
+                      ("tcp_enqueue: could not allocate memory for zero-copy pbuf\n"));
+          goto memerr;
+        }
+        ++queuelen;
+        /* reference the non-volatile payload data */
+        p->payload = ptr;
+        seg->dataptr = ptr;
+
+        /* Concatenate the headers and data pbufs together. */
+        pbuf_cat(seg->p/*header*/, p/*data*/);
+        p = NULL;
+      }
+    }
+
+    /* Now that there are more segments queued, we check again if the
+    length of the queue exceeds the configured maximum or overflows. */
+    if ((queuelen > TCP_SND_QUEUELEN) || (queuelen > TCP_SNDQUEUELEN_OVERFLOW)) {
+      LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: queue too long %"U16_F" (%"U16_F")\n", queuelen, TCP_SND_QUEUELEN));
+      goto memerr;
+    }
+
+    seg->len = seglen;
+
+    /* build TCP header */
+    if (pbuf_header(seg->p, TCP_HLEN)) {
+      LWIP_DEBUGF(TCP_OUTPUT_DEBUG | 2, ("tcp_enqueue: no room for TCP header in pbuf.\n"));
+      TCP_STATS_INC(tcp.err);
+      goto memerr;
+    }
+    seg->tcphdr = seg->p->payload;
+    seg->tcphdr->src = htons(pcb->local_port);
+    seg->tcphdr->dest = htons(pcb->remote_port);
+    seg->tcphdr->seqno = htonl(seqno);
+    seg->tcphdr->urgp = 0;
+    TCPH_FLAGS_SET(seg->tcphdr, flags);
+    /* don't fill in tcphdr->ackno and tcphdr->wnd until later */
+
+    seg->flags = optflags;
+
+    /* Set the length of the header */
+    TCPH_HDRLEN_SET(seg->tcphdr, (5 + optlen / 4));
+    LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_TRACE, ("tcp_enqueue: queueing %"U32_F":%"U32_F" (0x%"X16_F")\n",
+      ntohl(seg->tcphdr->seqno),
+      ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg),
+      (u16_t)flags));
+
+    left -= seglen;
+    seqno += seglen;
+    ptr = (void *)((u8_t *)ptr + seglen);
+  }
+
+  /* Now that the data to be enqueued has been broken up into TCP
+  segments in the queue variable, we add them to the end of the
+  pcb->unsent queue. */
+  if (pcb->unsent == NULL) {
+    useg = NULL;
+  }
+  else {
+    for (useg = pcb->unsent; useg->next != NULL; useg = useg->next);
+  }
+  /* { useg is last segment on the unsent queue, NULL if list is empty } */
+
+  /* If there is room in the last pbuf on the unsent queue,
+  chain the first pbuf on the queue together with that. */
+  if (useg != NULL &&
+    TCP_TCPLEN(useg) != 0 &&
+    !(TCPH_FLAGS(useg->tcphdr) & (TCP_SYN | TCP_FIN)) &&
+    !(flags & (TCP_SYN | TCP_FIN)) &&
+    /* fit within max seg size */
+    (useg->len + queue->len <= pcb->mss) &&
+    /* only concatenate segments with the same options */
+    (useg->flags == queue->flags)) {
+    /* Remove TCP header from first segment of our to-be-queued list */
+    if(pbuf_header(queue->p, -(TCP_HLEN + optlen))) {
+      /* Can we cope with this failing?  Just assert for now */
+      LWIP_ASSERT("pbuf_header failed\n", 0);
+      TCP_STATS_INC(tcp.err);
+      goto memerr;
+    }
+    if (queue->p->len == 0) {
+      /* free the first (header-only) pbuf if it is now empty (contained only headers) */
+      struct pbuf *old_q = queue->p;
+      queue->p = queue->p->next;
+      old_q->next = NULL;
+      queuelen--;
+      pbuf_free(old_q);
+    }
+    LWIP_ASSERT("zero-length pbuf", (queue->p != NULL) && (queue->p->len > 0));
+    pbuf_cat(useg->p, queue->p);
+    useg->len += queue->len;
+    useg->next = queue->next;
+
+    LWIP_DEBUGF(TCP_OUTPUT_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE, ("tcp_enqueue: chaining segments, new len %"U16_F"\n", useg->len));
+    if (seg == queue) {
+      seg = useg;
+      seglen = useg->len;
+    }
+    memp_free(MEMP_TCP_SEG, queue);
+  }
+  else {
+    /* empty list */
+    if (useg == NULL) {
+      /* initialize list with this segment */
+      pcb->unsent = queue;
+    }
+    /* enqueue segment */
+    else {
+      useg->next = queue;
+    }
+  }
+  if ((flags & TCP_SYN) || (flags & TCP_FIN)) {
+    ++len;
+  }
+  if (flags & TCP_FIN) {
+    pcb->flags |= TF_FIN;
+  }
+  pcb->snd_lbb += len;
+
+  pcb->snd_buf -= len;
+
+  /* update number of segments on the queues */
+  pcb->snd_queuelen = queuelen;
+  LWIP_DEBUGF(TCP_QLEN_DEBUG, ("tcp_enqueue: %"S16_F" (after enqueued)\n", pcb->snd_queuelen));
+  if (pcb->snd_queuelen != 0) {
+    LWIP_ASSERT("tcp_enqueue: valid queue length",
+      pcb->unacked != NULL || pcb->unsent != NULL);
+  }
+
+  /* Set the PSH flag in the last segment that we enqueued, but only
+  if the segment has data (indicated by seglen > 0). */
+  if (seg != NULL && seglen > 0 && seg->tcphdr != NULL && ((apiflags & TCP_WRITE_FLAG_MORE)==0)) {
+    TCPH_SET_FLAG(seg->tcphdr, TCP_PSH);
+  }
+
+  return ERR_OK;
+memerr:
+  pcb->flags |= TF_NAGLEMEMERR;
+  TCP_STATS_INC(tcp.memerr);
+
+  if (queue != NULL) {
+    tcp_segs_free(queue);
+  }
+  if (pcb->snd_queuelen != 0) {
+    LWIP_ASSERT("tcp_enqueue: valid queue length", pcb->unacked != NULL ||
+      pcb->unsent != NULL);
+  }
+  LWIP_DEBUGF(TCP_QLEN_DEBUG | LWIP_DBG_STATE, ("tcp_enqueue: %"S16_F" (with mem err)\n", pcb->snd_queuelen));
+  return ERR_MEM;
+}
+
+
+#if LWIP_TCP_TIMESTAMPS
+/* Build a timestamp option (12 bytes long) at the specified options pointer)
+ *
+ * @param pcb tcp_pcb
+ * @param opts option pointer where to store the timestamp option
+ */
+static void
+tcp_build_timestamp_option(struct tcp_pcb *pcb, u32_t *opts)
+{
+  /* Pad with two NOP options to make everything nicely aligned */
+  opts[0] = htonl(0x0101080A);
+  opts[1] = htonl(sys_now());
+  opts[2] = htonl(pcb->ts_recent);
+}
+#endif
+
+
+/**
+ * Find out what we can send and send it
+ *
+ * @param pcb Protocol control block for the TCP connection to send data
+ * @return ERR_OK if data has been sent or nothing to send
+ *         another err_t on error
+ */
+err_t
+tcp_output(struct tcp_pcb *pcb)
+{
+  struct pbuf *p;
+  struct tcp_hdr *tcphdr;
+  struct tcp_seg *seg, *useg;
+  u32_t wnd, snd_nxt;
+#if TCP_CWND_DEBUG
+  s16_t i = 0;
+#endif /* TCP_CWND_DEBUG */
+  u8_t optlen = 0;
+
+  /* First, check if we are invoked by the TCP input processing
+     code. If so, we do not output anything. Instead, we rely on the
+     input processing code to call us when input processing is done
+     with. */
+  if (tcp_input_pcb == pcb) {
+    return ERR_OK;
+  }
+
+  wnd = LWIP_MIN(pcb->snd_wnd, pcb->cwnd);
+
+  seg = pcb->unsent;
+
+  /* useg should point to last segment on unacked queue */
+  useg = pcb->unacked;
+  if (useg != NULL) {
+    for (; useg->next != NULL; useg = useg->next);
+  }
+
+  /* If the TF_ACK_NOW flag is set and no data will be sent (either
+   * because the ->unsent queue is empty or because the window does
+   * not allow it), construct an empty ACK segment and send it.
+   *
+   * If data is to be sent, we will just piggyback the ACK (see below).
+   */
+  if (pcb->flags & TF_ACK_NOW &&
+     (seg == NULL ||
+      ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len > wnd)) {
+#if LWIP_TCP_TIMESTAMPS
+    if (pcb->flags & TF_TIMESTAMP)
+      optlen = LWIP_TCP_OPT_LENGTH(TF_SEG_OPTS_TS);
+#endif
+    p = pbuf_alloc(PBUF_IP, TCP_HLEN + optlen, PBUF_RAM);
+    if (p == NULL) {
+      LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: (ACK) could not allocate pbuf\n"));
+      return ERR_BUF;
+    }
+    LWIP_DEBUGF(TCP_OUTPUT_DEBUG, 
+                ("tcp_output: sending ACK for %"U32_F"\n", pcb->rcv_nxt));
+    /* remove ACK flags from the PCB, as we send an empty ACK now */
+    pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW);
+
+    tcphdr = tcp_output_set_header(pcb, p, optlen, htonl(pcb->snd_nxt));
+
+    /* NB. MSS option is only sent on SYNs, so ignore it here */
+#if LWIP_TCP_TIMESTAMPS
+    pcb->ts_lastacksent = pcb->rcv_nxt;
+
+    if (pcb->flags & TF_TIMESTAMP)
+      tcp_build_timestamp_option(pcb, (u32_t *)(tcphdr + 1));
+#endif 
+
+#if CHECKSUM_GEN_TCP
+    tcphdr->chksum = inet_chksum_pseudo(p, &(pcb->local_ip), &(pcb->remote_ip),
+          IP_PROTO_TCP, p->tot_len);
+#endif
+#if LWIP_NETIF_HWADDRHINT
+    ip_output_hinted(p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos,
+        IP_PROTO_TCP, &(pcb->addr_hint));
+#else /* LWIP_NETIF_HWADDRHINT*/
+    ip_output(p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos,
+        IP_PROTO_TCP);
+#endif /* LWIP_NETIF_HWADDRHINT*/
+    pbuf_free(p);
+
+    return ERR_OK;
+  }
+
+#if TCP_OUTPUT_DEBUG
+  if (seg == NULL) {
+    LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output: nothing to send (%p)\n",
+                                   (void*)pcb->unsent));
+  }
+#endif /* TCP_OUTPUT_DEBUG */
+#if TCP_CWND_DEBUG
+  if (seg == NULL) {
+    LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %"U16_F
+                                 ", cwnd %"U16_F", wnd %"U32_F
+                                 ", seg == NULL, ack %"U32_F"\n",
+                                 pcb->snd_wnd, pcb->cwnd, wnd, pcb->lastack));
+  } else {
+    LWIP_DEBUGF(TCP_CWND_DEBUG, 
+                ("tcp_output: snd_wnd %"U16_F", cwnd %"U16_F", wnd %"U32_F
+                 ", effwnd %"U32_F", seq %"U32_F", ack %"U32_F"\n",
+                 pcb->snd_wnd, pcb->cwnd, wnd,
+                 ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len,
+                 ntohl(seg->tcphdr->seqno), pcb->lastack));
+  }
+#endif /* TCP_CWND_DEBUG */
+  /* data available and window allows it to be sent? */
+  while (seg != NULL &&
+         ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len <= wnd) {
+    LWIP_ASSERT("RST not expected here!", 
+                (TCPH_FLAGS(seg->tcphdr) & TCP_RST) == 0);
+    /* Stop sending if the nagle algorithm would prevent it
+     * Don't stop:
+     * - if tcp_enqueue had a memory error before (prevent delayed ACK timeout) or
+     * - if FIN was already enqueued for this PCB (SYN is always alone in a segment -
+     *   either seg->next != NULL or pcb->unacked == NULL;
+     *   RST is no sent using tcp_enqueue/tcp_output.
+     */
+    if((tcp_do_output_nagle(pcb) == 0) &&
+      ((pcb->flags & (TF_NAGLEMEMERR | TF_FIN)) == 0)){
+      break;
+    }
+#if TCP_CWND_DEBUG
+    LWIP_DEBUGF(TCP_CWND_DEBUG, ("tcp_output: snd_wnd %"U16_F", cwnd %"U16_F", wnd %"U32_F", effwnd %"U32_F", seq %"U32_F", ack %"U32_F", i %"S16_F"\n",
+                            pcb->snd_wnd, pcb->cwnd, wnd,
+                            ntohl(seg->tcphdr->seqno) + seg->len -
+                            pcb->lastack,
+                            ntohl(seg->tcphdr->seqno), pcb->lastack, i));
+    ++i;
+#endif /* TCP_CWND_DEBUG */
+
+    pcb->unsent = seg->next;
+
+    if (pcb->state != SYN_SENT) {
+      TCPH_SET_FLAG(seg->tcphdr, TCP_ACK);
+      pcb->flags &= ~(TF_ACK_DELAY | TF_ACK_NOW);
+    }
+
+    tcp_output_segment(seg, pcb);
+    snd_nxt = ntohl(seg->tcphdr->seqno) + TCP_TCPLEN(seg);
+    if (TCP_SEQ_LT(pcb->snd_nxt, snd_nxt)) {
+      pcb->snd_nxt = snd_nxt;
+    }
+    /* put segment on unacknowledged list if length > 0 */
+    if (TCP_TCPLEN(seg) > 0) {
+      seg->next = NULL;
+      /* unacked list is empty? */
+      if (pcb->unacked == NULL) {
+        pcb->unacked = seg;
+        useg = seg;
+      /* unacked list is not empty? */
+      } else {
+        /* In the case of fast retransmit, the packet should not go to the tail
+         * of the unacked queue, but rather somewhere before it. We need to check for
+         * this case. -STJ Jul 27, 2004 */
+        if (TCP_SEQ_LT(ntohl(seg->tcphdr->seqno), ntohl(useg->tcphdr->seqno))){
+          /* add segment to before tail of unacked list, keeping the list sorted */
+          struct tcp_seg **cur_seg = &(pcb->unacked);
+          while (*cur_seg &&
+            TCP_SEQ_LT(ntohl((*cur_seg)->tcphdr->seqno), ntohl(seg->tcphdr->seqno))) {
+              cur_seg = &((*cur_seg)->next );
+          }
+          seg->next = (*cur_seg);
+          (*cur_seg) = seg;
+        } else {
+          /* add segment to tail of unacked list */
+          useg->next = seg;
+          useg = useg->next;
+        }
+      }
+    /* do not queue empty segments on the unacked list */
+    } else {
+      tcp_seg_free(seg);
+    }
+    seg = pcb->unsent;
+  }
+
+  if (seg != NULL && pcb->persist_backoff == 0 && 
+      ntohl(seg->tcphdr->seqno) - pcb->lastack + seg->len > pcb->snd_wnd) {
+    /* prepare for persist timer */
+    pcb->persist_cnt = 0;
+    pcb->persist_backoff = 1;
+  }
+
+  pcb->flags &= ~TF_NAGLEMEMERR;
+  return ERR_OK;
+}
+
+/**
+ * Called by tcp_output() to actually send a TCP segment over IP.
+ *
+ * @param seg the tcp_seg to send
+ * @param pcb the tcp_pcb for the TCP connection used to send the segment
+ */
+static void
+tcp_output_segment(struct tcp_seg *seg, struct tcp_pcb *pcb)
+{
+  u16_t len;
+  struct netif *netif;
+  u32_t *opts;
+
+  /** @bug Exclude retransmitted segments from this count. */
+  snmp_inc_tcpoutsegs();
+
+  /* The TCP header has already been constructed, but the ackno and
+   wnd fields remain. */
+  seg->tcphdr->ackno = htonl(pcb->rcv_nxt);
+
+  /* advertise our receive window size in this TCP segment */
+  seg->tcphdr->wnd = htons(pcb->rcv_ann_wnd);
+
+  pcb->rcv_ann_right_edge = pcb->rcv_nxt + pcb->rcv_ann_wnd;
+
+  /* Add any requested options.  NB MSS option is only set on SYN
+     packets, so ignore it here */
+  opts = (u32_t *)(seg->tcphdr + 1);
+  if (seg->flags & TF_SEG_OPTS_MSS) {
+    TCP_BUILD_MSS_OPTION(*opts);
+    opts += 1;
+  }
+#if LWIP_TCP_TIMESTAMPS
+  pcb->ts_lastacksent = pcb->rcv_nxt;
+
+  if (seg->flags & TF_SEG_OPTS_TS) {
+    tcp_build_timestamp_option(pcb, opts);
+    opts += 3;
+  }
+#endif
+
+  /* If we don't have a local IP address, we get one by
+     calling ip_route(). */
+  if (ip_addr_isany(&(pcb->local_ip))) {
+    netif = ip_route(&(pcb->remote_ip));
+    if (netif == NULL) {
+      return;
+    }
+    ip_addr_set(&(pcb->local_ip), &(netif->ip_addr));
+  }
+
+  /* Set retransmission timer running if it is not currently enabled */
+  if(pcb->rtime == -1)
+    pcb->rtime = 0;
+
+  if (pcb->rttest == 0) {
+    pcb->rttest = tcp_ticks;
+    pcb->rtseq = ntohl(seg->tcphdr->seqno);
+
+    LWIP_DEBUGF(TCP_RTO_DEBUG, ("tcp_output_segment: rtseq %"U32_F"\n", pcb->rtseq));
+  }
+  LWIP_DEBUGF(TCP_OUTPUT_DEBUG, ("tcp_output_segment: %"U32_F":%"U32_F"\n",
+          htonl(seg->tcphdr->seqno), htonl(seg->tcphdr->seqno) +
+          seg->len));
+
+  len = (u16_t)((u8_t *)seg->tcphdr - (u8_t *)seg->p->payload);
+
+  seg->p->len -= len;
+  seg->p->tot_len -= len;
+
+  seg->p->payload = seg->tcphdr;
+
+  seg->tcphdr->chksum = 0;
+#if CHECKSUM_GEN_TCP
+  seg->tcphdr->chksum = inet_chksum_pseudo(seg->p,
+             &(pcb->local_ip),
+             &(pcb->remote_ip),
+             IP_PROTO_TCP, seg->p->tot_len);
+#endif
+  TCP_STATS_INC(tcp.xmit);
+
+#if LWIP_NETIF_HWADDRHINT
+  ip_output_hinted(seg->p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos,
+      IP_PROTO_TCP, &(pcb->addr_hint));
+#else /* LWIP_NETIF_HWADDRHINT*/
+  ip_output(seg->p, &(pcb->local_ip), &(pcb->remote_ip), pcb->ttl, pcb->tos,
+      IP_PROTO_TCP);
+#endif /* LWIP_NETIF_HWADDRHINT*/
+}
+
+/**
+ * Send a TCP RESET packet (empty segment with RST flag set) either to
+ * abort a connection or to show that there is no matching local connection
+ * for a received segment.
+ *
+ * Called by tcp_abort() (to abort a local connection), tcp_input() (if no
+ * matching local pcb was found), tcp_listen_input() (if incoming segment
+ * has ACK flag set) and tcp_process() (received segment in the wrong state)
+ *
+ * Since a RST segment is in most cases not sent for an active connection,
+ * tcp_rst() has a number of arguments that are taken from a tcp_pcb for
+ * most other segment output functions.
+ *
+ * @param seqno the sequence number to use for the outgoing segment
+ * @param ackno the acknowledge number to use for the outgoing segment
+ * @param local_ip the local IP address to send the segment from
+ * @param remote_ip the remote IP address to send the segment to
+ * @param local_port the local TCP port to send the segment from
+ * @param remote_port the remote TCP port to send the segment to
+ */
+void
+tcp_rst(u32_t seqno, u32_t ackno,
+  struct ip_addr *local_ip, struct ip_addr *remote_ip,
+  u16_t local_port, u16_t remote_port)
+{
+  struct pbuf *p;
+  struct tcp_hdr *tcphdr;
+  p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM);
+  if (p == NULL) {
+      LWIP_DEBUGF(TCP_DEBUG, ("tcp_rst: could not allocate memory for pbuf\n"));
+      return;
+  }
+  LWIP_ASSERT("check that first pbuf can hold struct tcp_hdr",
+              (p->len >= sizeof(struct tcp_hdr)));
+
+  tcphdr = p->payload;
+  tcphdr->src = htons(local_port);
+  tcphdr->dest = htons(remote_port);
+  tcphdr->seqno = htonl(seqno);
+  tcphdr->ackno = htonl(ackno);
+  TCPH_FLAGS_SET(tcphdr, TCP_RST | TCP_ACK);
+  tcphdr->wnd = htons(TCP_WND);
+  tcphdr->urgp = 0;
+  TCPH_HDRLEN_SET(tcphdr, 5);
+
+  tcphdr->chksum = 0;
+#if CHECKSUM_GEN_TCP
+  tcphdr->chksum = inet_chksum_pseudo(p, local_ip, remote_ip,
+              IP_PROTO_TCP, p->tot_len);
+#endif
+  TCP_STATS_INC(tcp.xmit);
+  snmp_inc_tcpoutrsts();
+   /* Send output with hardcoded TTL since we have no access to the pcb */
+  ip_output(p, local_ip, remote_ip, TCP_TTL, 0, IP_PROTO_TCP);
+  pbuf_free(p);
+  LWIP_DEBUGF(TCP_RST_DEBUG, ("tcp_rst: seqno %"U32_F" ackno %"U32_F".\n", seqno, ackno));
+}
+
+/**
+ * Requeue all unacked segments for retransmission
+ *
+ * Called by tcp_slowtmr() for slow retransmission.
+ *
+ * @param pcb the tcp_pcb for which to re-enqueue all unacked segments
+ */
+void
+tcp_rexmit_rto(struct tcp_pcb *pcb)
+{
+  struct tcp_seg *seg;
+
+  if (pcb->unacked == NULL) {
+    return;
+  }
+
+  /* Move all unacked segments to the head of the unsent queue */
+  for (seg = pcb->unacked; seg->next != NULL; seg = seg->next);
+  /* concatenate unsent queue after unacked queue */
+  seg->next = pcb->unsent;
+  /* unsent queue is the concatenated queue (of unacked, unsent) */
+  pcb->unsent = pcb->unacked;
+  /* unacked queue is now empty */
+  pcb->unacked = NULL;
+
+  /* increment number of retransmissions */
+  ++pcb->nrtx;
+
+  /* Don't take any RTT measurements after retransmitting. */
+  pcb->rttest = 0;
+
+  /* Do the actual retransmission */
+  tcp_output(pcb);
+}
+
+/**
+ * Requeue the first unacked segment for retransmission
+ *
+ * Called by tcp_receive() for fast retramsmit.
+ *
+ * @param pcb the tcp_pcb for which to retransmit the first unacked segment
+ */
+void
+tcp_rexmit(struct tcp_pcb *pcb)
+{
+  struct tcp_seg *seg;
+  struct tcp_seg **cur_seg;
+
+  if (pcb->unacked == NULL) {
+    return;
+  }
+
+  /* Move the first unacked segment to the unsent queue */
+  /* Keep the unsent queue sorted. */
+  seg = pcb->unacked;
+  pcb->unacked = seg->next;
+
+  cur_seg = &(pcb->unsent);
+  while (*cur_seg &&
+    TCP_SEQ_LT(ntohl((*cur_seg)->tcphdr->seqno), ntohl(seg->tcphdr->seqno))) {
+      cur_seg = &((*cur_seg)->next );
+  }
+  seg->next = *cur_seg;
+  *cur_seg = seg;
+
+  ++pcb->nrtx;
+
+  /* Don't take any rtt measurements after retransmitting. */
+  pcb->rttest = 0;
+
+  /* Do the actual retransmission. */
+  snmp_inc_tcpretranssegs();
+  tcp_output(pcb);
+}
+
+/**
+ * Send keepalive packets to keep a connection active although
+ * no data is sent over it.
+ *
+ * Called by tcp_slowtmr()
+ *
+ * @param pcb the tcp_pcb for which to send a keepalive packet
+ */
+void
+tcp_keepalive(struct tcp_pcb *pcb)
+{
+  struct pbuf *p;
+  struct tcp_hdr *tcphdr;
+
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: sending KEEPALIVE probe to %"U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
+                          ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip),
+                          ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip)));
+
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: tcp_ticks %"U32_F"   pcb->tmr %"U32_F" pcb->keep_cnt_sent %"U16_F"\n", 
+                          tcp_ticks, pcb->tmr, pcb->keep_cnt_sent));
+   
+  p = pbuf_alloc(PBUF_IP, TCP_HLEN, PBUF_RAM);
+   
+  if(p == NULL) {
+    LWIP_DEBUGF(TCP_DEBUG, 
+                ("tcp_keepalive: could not allocate memory for pbuf\n"));
+    return;
+  }
+  LWIP_ASSERT("check that first pbuf can hold struct tcp_hdr",
+              (p->len >= sizeof(struct tcp_hdr)));
+
+  tcphdr = tcp_output_set_header(pcb, p, 0, htonl(pcb->snd_nxt - 1));
+
+#if CHECKSUM_GEN_TCP
+  tcphdr->chksum = inet_chksum_pseudo(p, &pcb->local_ip, &pcb->remote_ip,
+                                      IP_PROTO_TCP, p->tot_len);
+#endif
+  TCP_STATS_INC(tcp.xmit);
+
+  /* Send output to IP */
+#if LWIP_NETIF_HWADDRHINT
+  ip_output_hinted(p, &pcb->local_ip, &pcb->remote_ip, pcb->ttl, 0, IP_PROTO_TCP,
+    &(pcb->addr_hint));
+#else /* LWIP_NETIF_HWADDRHINT*/
+  ip_output(p, &pcb->local_ip, &pcb->remote_ip, pcb->ttl, 0, IP_PROTO_TCP);
+#endif /* LWIP_NETIF_HWADDRHINT*/
+
+  pbuf_free(p);
+
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_keepalive: seqno %"U32_F" ackno %"U32_F".\n",
+                          pcb->snd_nxt - 1, pcb->rcv_nxt));
+}
+
+
+/**
+ * Send persist timer zero-window probes to keep a connection active
+ * when a window update is lost.
+ *
+ * Called by tcp_slowtmr()
+ *
+ * @param pcb the tcp_pcb for which to send a zero-window probe packet
+ */
+void
+tcp_zero_window_probe(struct tcp_pcb *pcb)
+{
+  struct pbuf *p;
+  struct tcp_hdr *tcphdr;
+  struct tcp_seg *seg;
+
+  LWIP_DEBUGF(TCP_DEBUG, 
+              ("tcp_zero_window_probe: sending ZERO WINDOW probe to %"
+               U16_F".%"U16_F".%"U16_F".%"U16_F"\n",
+               ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip),
+               ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip)));
+
+  LWIP_DEBUGF(TCP_DEBUG, 
+              ("tcp_zero_window_probe: tcp_ticks %"U32_F
+               "   pcb->tmr %"U32_F" pcb->keep_cnt_sent %"U16_F"\n", 
+               tcp_ticks, pcb->tmr, pcb->keep_cnt_sent));
+
+  seg = pcb->unacked;
+
+  if(seg == NULL)
+    seg = pcb->unsent;
+
+  if(seg == NULL)
+    return;
+
+  p = pbuf_alloc(PBUF_IP, TCP_HLEN + 1, PBUF_RAM);
+   
+  if(p == NULL) {
+    LWIP_DEBUGF(TCP_DEBUG, ("tcp_zero_window_probe: no memory for pbuf\n"));
+    return;
+  }
+  LWIP_ASSERT("check that first pbuf can hold struct tcp_hdr",
+              (p->len >= sizeof(struct tcp_hdr)));
+
+  tcphdr = tcp_output_set_header(pcb, p, 0, seg->tcphdr->seqno);
+
+  /* Copy in one byte from the head of the unacked queue */
+  *((char *)p->payload + sizeof(struct tcp_hdr)) = *(char *)seg->dataptr;
+
+#if CHECKSUM_GEN_TCP
+  tcphdr->chksum = inet_chksum_pseudo(p, &pcb->local_ip, &pcb->remote_ip,
+                                      IP_PROTO_TCP, p->tot_len);
+#endif
+  TCP_STATS_INC(tcp.xmit);
+
+  /* Send output to IP */
+#if LWIP_NETIF_HWADDRHINT
+  ip_output_hinted(p, &pcb->local_ip, &pcb->remote_ip, pcb->ttl, 0, IP_PROTO_TCP,
+    &(pcb->addr_hint));
+#else /* LWIP_NETIF_HWADDRHINT*/
+  ip_output(p, &pcb->local_ip, &pcb->remote_ip, pcb->ttl, 0, IP_PROTO_TCP);
+#endif /* LWIP_NETIF_HWADDRHINT*/
+
+  pbuf_free(p);
+
+  LWIP_DEBUGF(TCP_DEBUG, ("tcp_zero_window_probe: seqno %"U32_F
+                          " ackno %"U32_F".\n",
+                          pcb->snd_nxt - 1, pcb->rcv_nxt));
+}
+#endif /* LWIP_TCP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/core/udp.c b/firmware/x300/lwip/lwip-1.3.1/src/core/udp.c
new file mode 100644
index 000000000..d8d644d44
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/core/udp.c
@@ -0,0 +1,840 @@
+/**
+ * @file
+ * User Datagram Protocol module
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+
+/* udp.c
+ *
+ * The code for the User Datagram Protocol UDP & UDPLite (RFC 3828).
+ *
+ */
+
+/* @todo Check the use of '(struct udp_pcb).chksum_len_rx'!
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_UDP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/udp.h"
+#include "lwip/def.h"
+#include "lwip/memp.h"
+#include "lwip/inet.h"
+#include "lwip/inet_chksum.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/icmp.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+#include "arch/perf.h"
+#include "lwip/dhcp.h"
+
+#include <string.h>
+
+/* The list of UDP PCBs */
+/* exported in udp.h (was static) */
+struct udp_pcb *udp_pcbs;
+
+/**
+ * Process an incoming UDP datagram.
+ *
+ * Given an incoming UDP datagram (as a chain of pbufs) this function
+ * finds a corresponding UDP PCB and hands over the pbuf to the pcbs
+ * recv function. If no pcb is found or the datagram is incorrect, the
+ * pbuf is freed.
+ *
+ * @param p pbuf to be demultiplexed to a UDP PCB.
+ * @param inp network interface on which the datagram was received.
+ *
+ */
+void
+udp_input(struct pbuf *p, struct netif *inp)
+{
+  struct udp_hdr *udphdr;
+  struct udp_pcb *pcb, *prev;
+  struct udp_pcb *uncon_pcb;
+  struct ip_hdr *iphdr;
+  u16_t src, dest;
+  u8_t local_match;
+  u8_t broadcast;
+
+  PERF_START;
+
+  UDP_STATS_INC(udp.recv);
+
+  iphdr = p->payload;
+
+  /* Check minimum length (IP header + UDP header)
+   * and move payload pointer to UDP header */
+  if (p->tot_len < (IPH_HL(iphdr) * 4 + UDP_HLEN) || pbuf_header(p, -(s16_t)(IPH_HL(iphdr) * 4))) {
+    /* drop short packets */
+    LWIP_DEBUGF(UDP_DEBUG,
+                ("udp_input: short UDP datagram (%"U16_F" bytes) discarded\n", p->tot_len));
+    UDP_STATS_INC(udp.lenerr);
+    UDP_STATS_INC(udp.drop);
+    snmp_inc_udpinerrors();
+    pbuf_free(p);
+    goto end;
+  }
+
+  udphdr = (struct udp_hdr *)p->payload;
+
+  /* is broadcast packet ? */
+  broadcast = ip_addr_isbroadcast(&(iphdr->dest), inp);
+
+  LWIP_DEBUGF(UDP_DEBUG, ("udp_input: received datagram of length %"U16_F"\n", p->tot_len));
+
+  /* convert src and dest ports to host byte order */
+  src = ntohs(udphdr->src);
+  dest = ntohs(udphdr->dest);
+
+  udp_debug_print(udphdr);
+
+  /* print the UDP source and destination */
+  LWIP_DEBUGF(UDP_DEBUG,
+              ("udp (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") <-- "
+               "(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n",
+               ip4_addr1(&iphdr->dest), ip4_addr2(&iphdr->dest),
+               ip4_addr3(&iphdr->dest), ip4_addr4(&iphdr->dest), ntohs(udphdr->dest),
+               ip4_addr1(&iphdr->src), ip4_addr2(&iphdr->src),
+               ip4_addr3(&iphdr->src), ip4_addr4(&iphdr->src), ntohs(udphdr->src)));
+
+#if LWIP_DHCP
+  pcb = NULL;
+  /* when LWIP_DHCP is active, packets to DHCP_CLIENT_PORT may only be processed by
+     the dhcp module, no other UDP pcb may use the local UDP port DHCP_CLIENT_PORT */
+  if (dest == DHCP_CLIENT_PORT) {
+    /* all packets for DHCP_CLIENT_PORT not coming from DHCP_SERVER_PORT are dropped! */
+    if (src == DHCP_SERVER_PORT) {
+      if ((inp->dhcp != NULL) && (inp->dhcp->pcb != NULL)) {
+        /* accept the packe if 
+           (- broadcast or directed to us) -> DHCP is link-layer-addressed, local ip is always ANY!
+           - inp->dhcp->pcb->remote == ANY or iphdr->src */
+        if ((ip_addr_isany(&inp->dhcp->pcb->remote_ip) ||
+           ip_addr_cmp(&(inp->dhcp->pcb->remote_ip), &(iphdr->src)))) {
+          pcb = inp->dhcp->pcb;
+        }
+      }
+    }
+  } else
+#endif /* LWIP_DHCP */
+  {
+    prev = NULL;
+    local_match = 0;
+    uncon_pcb = NULL;
+    /* Iterate through the UDP pcb list for a matching pcb.
+     * 'Perfect match' pcbs (connected to the remote port & ip address) are
+     * preferred. If no perfect match is found, the first unconnected pcb that
+     * matches the local port and ip address gets the datagram. */
+    for (pcb = udp_pcbs; pcb != NULL; pcb = pcb->next) {
+      local_match = 0;
+      /* print the PCB local and remote address */
+      LWIP_DEBUGF(UDP_DEBUG,
+                  ("pcb (%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F") --- "
+                   "(%"U16_F".%"U16_F".%"U16_F".%"U16_F", %"U16_F")\n",
+                   ip4_addr1(&pcb->local_ip), ip4_addr2(&pcb->local_ip),
+                   ip4_addr3(&pcb->local_ip), ip4_addr4(&pcb->local_ip), pcb->local_port,
+                   ip4_addr1(&pcb->remote_ip), ip4_addr2(&pcb->remote_ip),
+                   ip4_addr3(&pcb->remote_ip), ip4_addr4(&pcb->remote_ip), pcb->remote_port));
+
+      /* compare PCB local addr+port to UDP destination addr+port */
+      if ((pcb->local_port == dest) &&
+          ((!broadcast && ip_addr_isany(&pcb->local_ip)) ||
+           ip_addr_cmp(&(pcb->local_ip), &(iphdr->dest)) ||
+#if LWIP_IGMP
+           ip_addr_ismulticast(&(iphdr->dest)) ||
+#endif /* LWIP_IGMP */
+#if IP_SOF_BROADCAST_RECV
+           (broadcast && (pcb->so_options & SOF_BROADCAST)))) {
+#else  /* IP_SOF_BROADCAST_RECV */
+           (broadcast))) {
+#endif /* IP_SOF_BROADCAST_RECV */
+        local_match = 1;
+        if ((uncon_pcb == NULL) && 
+            ((pcb->flags & UDP_FLAGS_CONNECTED) == 0)) {
+          /* the first unconnected matching PCB */
+          uncon_pcb = pcb;
+        }
+      }
+      /* compare PCB remote addr+port to UDP source addr+port */
+      if ((local_match != 0) &&
+          (pcb->remote_port == src) &&
+          (ip_addr_isany(&pcb->remote_ip) ||
+           ip_addr_cmp(&(pcb->remote_ip), &(iphdr->src)))) {
+        /* the first fully matching PCB */
+        if (prev != NULL) {
+          /* move the pcb to the front of udp_pcbs so that is
+             found faster next time */
+          prev->next = pcb->next;
+          pcb->next = udp_pcbs;
+          udp_pcbs = pcb;
+        } else {
+          UDP_STATS_INC(udp.cachehit);
+        }
+        break;
+      }
+      prev = pcb;
+    }
+    /* no fully matching pcb found? then look for an unconnected pcb */
+    if (pcb == NULL) {
+      pcb = uncon_pcb;
+    }
+  }
+
+  /* Check checksum if this is a match or if it was directed at us. */
+  if (pcb != NULL || ip_addr_cmp(&inp->ip_addr, &iphdr->dest)) {
+    LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_input: calculating checksum\n"));
+#if LWIP_UDPLITE
+    if (IPH_PROTO(iphdr) == IP_PROTO_UDPLITE) {
+      /* Do the UDP Lite checksum */
+#if CHECKSUM_CHECK_UDP
+      u16_t chklen = ntohs(udphdr->len);
+      if (chklen < sizeof(struct udp_hdr)) {
+        if (chklen == 0) {
+          /* For UDP-Lite, checksum length of 0 means checksum
+             over the complete packet (See RFC 3828 chap. 3.1) */
+          chklen = p->tot_len;
+        } else {
+          /* At least the UDP-Lite header must be covered by the
+             checksum! (Again, see RFC 3828 chap. 3.1) */
+          UDP_STATS_INC(udp.chkerr);
+          UDP_STATS_INC(udp.drop);
+          snmp_inc_udpinerrors();
+          pbuf_free(p);
+          goto end;
+        }
+      }
+      if (inet_chksum_pseudo_partial(p, (struct ip_addr *)&(iphdr->src),
+                             (struct ip_addr *)&(iphdr->dest),
+                             IP_PROTO_UDPLITE, p->tot_len, chklen) != 0) {
+        LWIP_DEBUGF(UDP_DEBUG | 2,
+                    ("udp_input: UDP Lite datagram discarded due to failing checksum\n"));
+        UDP_STATS_INC(udp.chkerr);
+        UDP_STATS_INC(udp.drop);
+        snmp_inc_udpinerrors();
+        pbuf_free(p);
+        goto end;
+      }
+#endif /* CHECKSUM_CHECK_UDP */
+    } else
+#endif /* LWIP_UDPLITE */
+    {
+#if CHECKSUM_CHECK_UDP
+      if (udphdr->chksum != 0) {
+        if (inet_chksum_pseudo(p, (struct ip_addr *)&(iphdr->src),
+                               (struct ip_addr *)&(iphdr->dest),
+                               IP_PROTO_UDP, p->tot_len) != 0) {
+          LWIP_DEBUGF(UDP_DEBUG | 2,
+                      ("udp_input: UDP datagram discarded due to failing checksum\n"));
+          UDP_STATS_INC(udp.chkerr);
+          UDP_STATS_INC(udp.drop);
+          snmp_inc_udpinerrors();
+          pbuf_free(p);
+          goto end;
+        }
+      }
+#endif /* CHECKSUM_CHECK_UDP */
+    }
+    if(pbuf_header(p, -UDP_HLEN)) {
+      /* Can we cope with this failing? Just assert for now */
+      LWIP_ASSERT("pbuf_header failed\n", 0);
+      UDP_STATS_INC(udp.drop);
+      snmp_inc_udpinerrors();
+      pbuf_free(p);
+      goto end;
+    }
+    if (pcb != NULL) {
+      snmp_inc_udpindatagrams();
+      /* callback */
+      if (pcb->recv != NULL) {
+        /* now the recv function is responsible for freeing p */
+        pcb->recv(pcb->recv_arg, pcb, p, &(iphdr->src), src);
+      } else {
+        /* no recv function registered? then we have to free the pbuf! */
+        pbuf_free(p);
+        goto end;
+      }
+    } else {
+      LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE, ("udp_input: not for us.\n"));
+
+#if LWIP_ICMP
+      /* No match was found, send ICMP destination port unreachable unless
+         destination address was broadcast/multicast. */
+      if (!broadcast &&
+          !ip_addr_ismulticast(&iphdr->dest)) {
+        /* move payload pointer back to ip header */
+        pbuf_header(p, (IPH_HL(iphdr) * 4) + UDP_HLEN);
+        LWIP_ASSERT("p->payload == iphdr", (p->payload == iphdr));
+        icmp_dest_unreach(p, ICMP_DUR_PORT);
+      }
+#endif /* LWIP_ICMP */
+      UDP_STATS_INC(udp.proterr);
+      UDP_STATS_INC(udp.drop);
+      snmp_inc_udpnoports();
+      pbuf_free(p);
+    }
+  } else {
+    pbuf_free(p);
+  }
+end:
+  PERF_STOP("udp_input");
+}
+
+/**
+ * Send data using UDP.
+ *
+ * @param pcb UDP PCB used to send the data.
+ * @param p chain of pbuf's to be sent.
+ *
+ * The datagram will be sent to the current remote_ip & remote_port
+ * stored in pcb. If the pcb is not bound to a port, it will
+ * automatically be bound to a random port.
+ *
+ * @return lwIP error code.
+ * - ERR_OK. Successful. No error occured.
+ * - ERR_MEM. Out of memory.
+ * - ERR_RTE. Could not find route to destination address.
+ * - More errors could be returned by lower protocol layers.
+ *
+ * @see udp_disconnect() udp_sendto()
+ */
+err_t
+udp_send(struct udp_pcb *pcb, struct pbuf *p)
+{
+  /* send to the packet using remote ip and port stored in the pcb */
+  return udp_sendto(pcb, p, &pcb->remote_ip, pcb->remote_port);
+}
+
+/**
+ * Send data to a specified address using UDP.
+ *
+ * @param pcb UDP PCB used to send the data.
+ * @param p chain of pbuf's to be sent.
+ * @param dst_ip Destination IP address.
+ * @param dst_port Destination UDP port.
+ *
+ * dst_ip & dst_port are expected to be in the same byte order as in the pcb.
+ *
+ * If the PCB already has a remote address association, it will
+ * be restored after the data is sent.
+ * 
+ * @return lwIP error code (@see udp_send for possible error codes)
+ *
+ * @see udp_disconnect() udp_send()
+ */
+err_t
+udp_sendto(struct udp_pcb *pcb, struct pbuf *p,
+  struct ip_addr *dst_ip, u16_t dst_port)
+{
+  struct netif *netif;
+
+  LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | 3, ("udp_send\n"));
+
+  /* find the outgoing network interface for this packet */
+#if LWIP_IGMP
+  netif = ip_route((ip_addr_ismulticast(dst_ip))?(&(pcb->multicast_ip)):(dst_ip));
+#else
+  netif = ip_route(dst_ip);
+#endif /* LWIP_IGMP */
+
+  /* no outgoing network interface could be found? */
+  if (netif == NULL) {
+    LWIP_DEBUGF(UDP_DEBUG | 1, ("udp_send: No route to 0x%"X32_F"\n", dst_ip->addr));
+    UDP_STATS_INC(udp.rterr);
+    return ERR_RTE;
+  }
+  return udp_sendto_if(pcb, p, dst_ip, dst_port, netif);
+}
+
+/**
+ * Send data to a specified address using UDP.
+ * The netif used for sending can be specified.
+ *
+ * This function exists mainly for DHCP, to be able to send UDP packets
+ * on a netif that is still down.
+ *
+ * @param pcb UDP PCB used to send the data.
+ * @param p chain of pbuf's to be sent.
+ * @param dst_ip Destination IP address.
+ * @param dst_port Destination UDP port.
+ * @param netif the netif used for sending.
+ *
+ * dst_ip & dst_port are expected to be in the same byte order as in the pcb.
+ *
+ * @return lwIP error code (@see udp_send for possible error codes)
+ *
+ * @see udp_disconnect() udp_send()
+ */
+err_t
+udp_sendto_if(struct udp_pcb *pcb, struct pbuf *p,
+  struct ip_addr *dst_ip, u16_t dst_port, struct netif *netif)
+{
+  struct udp_hdr *udphdr;
+  struct ip_addr *src_ip;
+  err_t err;
+  struct pbuf *q; /* q will be sent down the stack */
+
+#if IP_SOF_BROADCAST
+  /* broadcast filter? */
+  if ( ((pcb->so_options & SOF_BROADCAST) == 0) && ip_addr_isbroadcast(dst_ip, netif) ) {
+    LWIP_DEBUGF(UDP_DEBUG | 1, ("udp_sendto_if: SOF_BROADCAST not enabled on pcb %p\n", (void *)pcb));
+    return ERR_VAL;
+  }
+#endif /* IP_SOF_BROADCAST */
+
+  /* if the PCB is not yet bound to a port, bind it here */
+  if (pcb->local_port == 0) {
+    LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | 2, ("udp_send: not yet bound to a port, binding now\n"));
+    err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
+    if (err != ERR_OK) {
+      LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | 2, ("udp_send: forced port bind failed\n"));
+      return err;
+    }
+  }
+
+  /* not enough space to add an UDP header to first pbuf in given p chain? */
+  if (pbuf_header(p, UDP_HLEN)) {
+    /* allocate header in a separate new pbuf */
+    q = pbuf_alloc(PBUF_IP, UDP_HLEN, PBUF_RAM);
+    /* new header pbuf could not be allocated? */
+    if (q == NULL) {
+      LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | 2, ("udp_send: could not allocate header\n"));
+      return ERR_MEM;
+    }
+    /* chain header q in front of given pbuf p */
+    pbuf_chain(q, p);
+    /* first pbuf q points to header pbuf */
+    LWIP_DEBUGF(UDP_DEBUG,
+                ("udp_send: added header pbuf %p before given pbuf %p\n", (void *)q, (void *)p));
+  } else {
+    /* adding space for header within p succeeded */
+    /* first pbuf q equals given pbuf */
+    q = p;
+    LWIP_DEBUGF(UDP_DEBUG, ("udp_send: added header in given pbuf %p\n", (void *)p));
+  }
+  LWIP_ASSERT("check that first pbuf can hold struct udp_hdr",
+              (q->len >= sizeof(struct udp_hdr)));
+  /* q now represents the packet to be sent */
+  udphdr = q->payload;
+  udphdr->src = htons(pcb->local_port);
+  udphdr->dest = htons(dst_port);
+  /* in UDP, 0 checksum means 'no checksum' */
+  udphdr->chksum = 0x0000; 
+
+  /* PCB local address is IP_ANY_ADDR? */
+  if (ip_addr_isany(&pcb->local_ip)) {
+    /* use outgoing network interface IP address as source address */
+    src_ip = &(netif->ip_addr);
+  } else {
+    /* check if UDP PCB local IP address is correct
+     * this could be an old address if netif->ip_addr has changed */
+    if (!ip_addr_cmp(&(pcb->local_ip), &(netif->ip_addr))) {
+      /* local_ip doesn't match, drop the packet */
+      if (q != p) {
+        /* free the header pbuf */
+        pbuf_free(q);
+        q = NULL;
+        /* p is still referenced by the caller, and will live on */
+      }
+      return ERR_VAL;
+    }
+    /* use UDP PCB local IP address as source address */
+    src_ip = &(pcb->local_ip);
+  }
+
+  LWIP_DEBUGF(UDP_DEBUG, ("udp_send: sending datagram of length %"U16_F"\n", q->tot_len));
+
+#if LWIP_UDPLITE
+  /* UDP Lite protocol? */
+  if (pcb->flags & UDP_FLAGS_UDPLITE) {
+    u16_t chklen, chklen_hdr;
+    LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE packet length %"U16_F"\n", q->tot_len));
+    /* set UDP message length in UDP header */
+    chklen_hdr = chklen = pcb->chksum_len_tx;
+    if ((chklen < sizeof(struct udp_hdr)) || (chklen > q->tot_len)) {
+      if (chklen != 0) {
+        LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP LITE pcb->chksum_len is illegal: %"U16_F"\n", chklen));
+      }
+      /* For UDP-Lite, checksum length of 0 means checksum
+         over the complete packet. (See RFC 3828 chap. 3.1)
+         At least the UDP-Lite header must be covered by the
+         checksum, therefore, if chksum_len has an illegal
+         value, we generate the checksum over the complete
+         packet to be safe. */
+      chklen_hdr = 0;
+      chklen = q->tot_len;
+    }
+    udphdr->len = htons(chklen_hdr);
+    /* calculate checksum */
+#if CHECKSUM_GEN_UDP
+    udphdr->chksum = inet_chksum_pseudo_partial(q, src_ip, dst_ip,
+                                        IP_PROTO_UDPLITE, q->tot_len, chklen);
+    /* chksum zero must become 0xffff, as zero means 'no checksum' */
+    if (udphdr->chksum == 0x0000)
+      udphdr->chksum = 0xffff;
+#endif /* CHECKSUM_CHECK_UDP */
+    /* output to IP */
+    LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDPLITE,)\n"));
+#if LWIP_NETIF_HWADDRHINT
+    netif->addr_hint = &(pcb->addr_hint);
+#endif /* LWIP_NETIF_HWADDRHINT*/
+    err = ip_output_if(q, src_ip, dst_ip, pcb->ttl, pcb->tos, IP_PROTO_UDPLITE, netif);
+#if LWIP_NETIF_HWADDRHINT
+    netif->addr_hint = NULL;
+#endif /* LWIP_NETIF_HWADDRHINT*/
+  } else
+#endif /* LWIP_UDPLITE */
+  {      /* UDP */
+    LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP packet length %"U16_F"\n", q->tot_len));
+    udphdr->len = htons(q->tot_len);
+    /* calculate checksum */
+#if CHECKSUM_GEN_UDP
+    if ((pcb->flags & UDP_FLAGS_NOCHKSUM) == 0) {
+      udphdr->chksum = inet_chksum_pseudo(q, src_ip, dst_ip, IP_PROTO_UDP, q->tot_len);
+      /* chksum zero must become 0xffff, as zero means 'no checksum' */
+      if (udphdr->chksum == 0x0000) udphdr->chksum = 0xffff;
+    }
+#endif /* CHECKSUM_CHECK_UDP */
+    LWIP_DEBUGF(UDP_DEBUG, ("udp_send: UDP checksum 0x%04"X16_F"\n", udphdr->chksum));
+    LWIP_DEBUGF(UDP_DEBUG, ("udp_send: ip_output_if (,,,,IP_PROTO_UDP,)\n"));
+    /* output to IP */
+#if LWIP_NETIF_HWADDRHINT
+    netif->addr_hint = &(pcb->addr_hint);
+#endif /* LWIP_NETIF_HWADDRHINT*/
+    err = ip_output_if(q, src_ip, dst_ip, pcb->ttl, pcb->tos, IP_PROTO_UDP, netif);
+#if LWIP_NETIF_HWADDRHINT
+    netif->addr_hint = NULL;
+#endif /* LWIP_NETIF_HWADDRHINT*/
+  }
+  /* TODO: must this be increased even if error occured? */
+  snmp_inc_udpoutdatagrams();
+
+  /* did we chain a separate header pbuf earlier? */
+  if (q != p) {
+    /* free the header pbuf */
+    pbuf_free(q);
+    q = NULL;
+    /* p is still referenced by the caller, and will live on */
+  }
+
+  UDP_STATS_INC(udp.xmit);
+  return err;
+}
+
+/**
+ * Bind an UDP PCB.
+ *
+ * @param pcb UDP PCB to be bound with a local address ipaddr and port.
+ * @param ipaddr local IP address to bind with. Use IP_ADDR_ANY to
+ * bind to all local interfaces.
+ * @param port local UDP port to bind with. Use 0 to automatically bind
+ * to a random port between UDP_LOCAL_PORT_RANGE_START and
+ * UDP_LOCAL_PORT_RANGE_END.
+ *
+ * ipaddr & port are expected to be in the same byte order as in the pcb.
+ *
+ * @return lwIP error code.
+ * - ERR_OK. Successful. No error occured.
+ * - ERR_USE. The specified ipaddr and port are already bound to by
+ * another UDP PCB.
+ *
+ * @see udp_disconnect()
+ */
+err_t
+udp_bind(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
+{
+  struct udp_pcb *ipcb;
+  u8_t rebind;
+
+  LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | 3, ("udp_bind(ipaddr = "));
+  ip_addr_debug_print(UDP_DEBUG, ipaddr);
+  LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | 3, (", port = %"U16_F")\n", port));
+
+  rebind = 0;
+  /* Check for double bind and rebind of the same pcb */
+  for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) {
+    /* is this UDP PCB already on active list? */
+    if (pcb == ipcb) {
+      /* pcb may occur at most once in active list */
+      LWIP_ASSERT("rebind == 0", rebind == 0);
+      /* pcb already in list, just rebind */
+      rebind = 1;
+    }
+
+    /* this code does not allow upper layer to share a UDP port for
+       listening to broadcast or multicast traffic (See SO_REUSE_ADDR and
+       SO_REUSE_PORT under *BSD). TODO: See where it fits instead, OR
+       combine with implementation of UDP PCB flags. Leon Woestenberg. */
+#ifdef LWIP_UDP_TODO
+    /* port matches that of PCB in list? */
+    else
+      if ((ipcb->local_port == port) &&
+          /* IP address matches, or one is IP_ADDR_ANY? */
+          (ip_addr_isany(&(ipcb->local_ip)) ||
+           ip_addr_isany(ipaddr) ||
+           ip_addr_cmp(&(ipcb->local_ip), ipaddr))) {
+        /* other PCB already binds to this local IP and port */
+        LWIP_DEBUGF(UDP_DEBUG,
+                    ("udp_bind: local port %"U16_F" already bound by another pcb\n", port));
+        return ERR_USE;
+      }
+#endif
+  }
+
+  ip_addr_set(&pcb->local_ip, ipaddr);
+
+  /* no port specified? */
+  if (port == 0) {
+#ifndef UDP_LOCAL_PORT_RANGE_START
+#define UDP_LOCAL_PORT_RANGE_START 4096
+#define UDP_LOCAL_PORT_RANGE_END   0x7fff
+#endif
+    port = UDP_LOCAL_PORT_RANGE_START;
+    ipcb = udp_pcbs;
+    while ((ipcb != NULL) && (port != UDP_LOCAL_PORT_RANGE_END)) {
+      if (ipcb->local_port == port) {
+        /* port is already used by another udp_pcb */
+        port++;
+        /* restart scanning all udp pcbs */
+        ipcb = udp_pcbs;
+      } else
+        /* go on with next udp pcb */
+        ipcb = ipcb->next;
+    }
+    if (ipcb != NULL) {
+      /* no more ports available in local range */
+      LWIP_DEBUGF(UDP_DEBUG, ("udp_bind: out of free UDP ports\n"));
+      return ERR_USE;
+    }
+  }
+  pcb->local_port = port;
+  snmp_insert_udpidx_tree(pcb);
+  /* pcb not active yet? */
+  if (rebind == 0) {
+    /* place the PCB on the active list if not already there */
+    pcb->next = udp_pcbs;
+    udp_pcbs = pcb;
+  }
+  LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
+              ("udp_bind: bound to %"U16_F".%"U16_F".%"U16_F".%"U16_F", port %"U16_F"\n",
+               (u16_t)((ntohl(pcb->local_ip.addr) >> 24) & 0xff),
+               (u16_t)((ntohl(pcb->local_ip.addr) >> 16) & 0xff),
+               (u16_t)((ntohl(pcb->local_ip.addr) >> 8) & 0xff),
+               (u16_t)(ntohl(pcb->local_ip.addr) & 0xff), pcb->local_port));
+  return ERR_OK;
+}
+/**
+ * Connect an UDP PCB.
+ *
+ * This will associate the UDP PCB with the remote address.
+ *
+ * @param pcb UDP PCB to be connected with remote address ipaddr and port.
+ * @param ipaddr remote IP address to connect with.
+ * @param port remote UDP port to connect with.
+ *
+ * @return lwIP error code
+ *
+ * ipaddr & port are expected to be in the same byte order as in the pcb.
+ *
+ * The udp pcb is bound to a random local port if not already bound.
+ *
+ * @see udp_disconnect()
+ */
+err_t
+udp_connect(struct udp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)
+{
+  struct udp_pcb *ipcb;
+
+  if (pcb->local_port == 0) {
+    err_t err = udp_bind(pcb, &pcb->local_ip, pcb->local_port);
+    if (err != ERR_OK)
+      return err;
+  }
+
+  ip_addr_set(&pcb->remote_ip, ipaddr);
+  pcb->remote_port = port;
+  pcb->flags |= UDP_FLAGS_CONNECTED;
+/** TODO: this functionality belongs in upper layers */
+#ifdef LWIP_UDP_TODO
+  /* Nail down local IP for netconn_addr()/getsockname() */
+  if (ip_addr_isany(&pcb->local_ip) && !ip_addr_isany(&pcb->remote_ip)) {
+    struct netif *netif;
+
+    if ((netif = ip_route(&(pcb->remote_ip))) == NULL) {
+      LWIP_DEBUGF(UDP_DEBUG, ("udp_connect: No route to 0x%lx\n", pcb->remote_ip.addr));
+      UDP_STATS_INC(udp.rterr);
+      return ERR_RTE;
+    }
+    /** TODO: this will bind the udp pcb locally, to the interface which
+        is used to route output packets to the remote address. However, we
+        might want to accept incoming packets on any interface! */
+    pcb->local_ip = netif->ip_addr;
+  } else if (ip_addr_isany(&pcb->remote_ip)) {
+    pcb->local_ip.addr = 0;
+  }
+#endif
+  LWIP_DEBUGF(UDP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
+              ("udp_connect: connected to %"U16_F".%"U16_F".%"U16_F".%"U16_F",port %"U16_F"\n",
+               (u16_t)((ntohl(pcb->remote_ip.addr) >> 24) & 0xff),
+               (u16_t)((ntohl(pcb->remote_ip.addr) >> 16) & 0xff),
+               (u16_t)((ntohl(pcb->remote_ip.addr) >> 8) & 0xff),
+               (u16_t)(ntohl(pcb->remote_ip.addr) & 0xff), pcb->remote_port));
+
+  /* Insert UDP PCB into the list of active UDP PCBs. */
+  for (ipcb = udp_pcbs; ipcb != NULL; ipcb = ipcb->next) {
+    if (pcb == ipcb) {
+      /* already on the list, just return */
+      return ERR_OK;
+    }
+  }
+  /* PCB not yet on the list, add PCB now */
+  pcb->next = udp_pcbs;
+  udp_pcbs = pcb;
+  return ERR_OK;
+}
+
+/**
+ * Disconnect a UDP PCB
+ *
+ * @param pcb the udp pcb to disconnect.
+ */
+void
+udp_disconnect(struct udp_pcb *pcb)
+{
+  /* reset remote address association */
+  ip_addr_set(&pcb->remote_ip, IP_ADDR_ANY);
+  pcb->remote_port = 0;
+  /* mark PCB as unconnected */
+  pcb->flags &= ~UDP_FLAGS_CONNECTED;
+}
+
+/**
+ * Set a receive callback for a UDP PCB
+ *
+ * This callback will be called when receiving a datagram for the pcb.
+ *
+ * @param pcb the pcb for wich to set the recv callback
+ * @param recv function pointer of the callback function
+ * @param recv_arg additional argument to pass to the callback function
+ */
+void
+udp_recv(struct udp_pcb *pcb,
+         void (* recv)(void *arg, struct udp_pcb *upcb, struct pbuf *p,
+                       struct ip_addr *addr, u16_t port),
+         void *recv_arg)
+{
+  /* remember recv() callback and user data */
+  pcb->recv = recv;
+  pcb->recv_arg = recv_arg;
+}
+
+/**
+ * Remove an UDP PCB.
+ *
+ * @param pcb UDP PCB to be removed. The PCB is removed from the list of
+ * UDP PCB's and the data structure is freed from memory.
+ *
+ * @see udp_new()
+ */
+void
+udp_remove(struct udp_pcb *pcb)
+{
+  struct udp_pcb *pcb2;
+
+  snmp_delete_udpidx_tree(pcb);
+  /* pcb to be removed is first in list? */
+  if (udp_pcbs == pcb) {
+    /* make list start at 2nd pcb */
+    udp_pcbs = udp_pcbs->next;
+    /* pcb not 1st in list */
+  } else
+    for (pcb2 = udp_pcbs; pcb2 != NULL; pcb2 = pcb2->next) {
+      /* find pcb in udp_pcbs list */
+      if (pcb2->next != NULL && pcb2->next == pcb) {
+        /* remove pcb from list */
+        pcb2->next = pcb->next;
+      }
+    }
+  memp_free(MEMP_UDP_PCB, pcb);
+}
+
+/**
+ * Create a UDP PCB.
+ *
+ * @return The UDP PCB which was created. NULL if the PCB data structure
+ * could not be allocated.
+ *
+ * @see udp_remove()
+ */
+struct udp_pcb *
+udp_new(void)
+{
+  struct udp_pcb *pcb;
+  pcb = memp_malloc(MEMP_UDP_PCB);
+  /* could allocate UDP PCB? */
+  if (pcb != NULL) {
+    /* UDP Lite: by initializing to all zeroes, chksum_len is set to 0
+     * which means checksum is generated over the whole datagram per default
+     * (recommended as default by RFC 3828). */
+    /* initialize PCB to all zeroes */
+    memset(pcb, 0, sizeof(struct udp_pcb));
+    pcb->ttl = UDP_TTL;
+  }
+  return pcb;
+}
+
+#if UDP_DEBUG
+/**
+ * Print UDP header information for debug purposes.
+ *
+ * @param udphdr pointer to the udp header in memory.
+ */
+void
+udp_debug_print(struct udp_hdr *udphdr)
+{
+  LWIP_DEBUGF(UDP_DEBUG, ("UDP header:\n"));
+  LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(UDP_DEBUG, ("|     %5"U16_F"     |     %5"U16_F"     | (src port, dest port)\n",
+                          ntohs(udphdr->src), ntohs(udphdr->dest)));
+  LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
+  LWIP_DEBUGF(UDP_DEBUG, ("|     %5"U16_F"     |     0x%04"X16_F"    | (len, chksum)\n",
+                          ntohs(udphdr->len), ntohs(udphdr->chksum)));
+  LWIP_DEBUGF(UDP_DEBUG, ("+-------------------------------+\n"));
+}
+#endif /* UDP_DEBUG */
+
+#endif /* LWIP_UDP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/autoip.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/autoip.h
new file mode 100644
index 000000000..076a2ed23
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/autoip.h
@@ -0,0 +1,105 @@
+/**
+ * @file
+ *
+ * AutoIP Automatic LinkLocal IP Configuration
+ */
+
+/*
+ *
+ * Copyright (c) 2007 Dominik Spies <kontakt@dspies.de>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Dominik Spies <kontakt@dspies.de>
+ *
+ * This is a AutoIP implementation for the lwIP TCP/IP stack. It aims to conform
+ * with RFC 3927.
+ *
+ *
+ * Please coordinate changes and requests with Dominik Spies
+ * <kontakt@dspies.de>
+ */
+ 
+#ifndef __LWIP_AUTOIP_H__
+#define __LWIP_AUTOIP_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_AUTOIP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netif.h"
+#include "lwip/udp.h"
+#include "netif/etharp.h"
+
+/* AutoIP Timing */
+#define AUTOIP_TMR_INTERVAL      100
+#define AUTOIP_TICKS_PER_SECOND (1000 / AUTOIP_TMR_INTERVAL)
+
+/* RFC 3927 Constants */
+#define PROBE_WAIT               1   /* second   (initial random delay)                 */
+#define PROBE_MIN                1   /* second   (minimum delay till repeated probe)    */
+#define PROBE_MAX                2   /* seconds  (maximum delay till repeated probe)    */
+#define PROBE_NUM                3   /*          (number of probe packets)              */
+#define ANNOUNCE_NUM             2   /*          (number of announcement packets)       */
+#define ANNOUNCE_INTERVAL        2   /* seconds  (time between announcement packets)    */
+#define ANNOUNCE_WAIT            2   /* seconds  (delay before announcing)              */
+#define MAX_CONFLICTS            10  /*          (max conflicts before rate limiting)   */
+#define RATE_LIMIT_INTERVAL      60  /* seconds  (delay between successive attempts)    */
+#define DEFEND_INTERVAL          10  /* seconds  (min. wait between defensive ARPs)     */
+
+/* AutoIP client states */
+#define AUTOIP_STATE_OFF         0
+#define AUTOIP_STATE_PROBING     1
+#define AUTOIP_STATE_ANNOUNCING  2
+#define AUTOIP_STATE_BOUND       3
+
+struct autoip
+{
+  struct ip_addr llipaddr;  /* the currently selected, probed, announced or used LL IP-Address */
+  u8_t state;               /* current AutoIP state machine state */
+  u8_t sent_num;            /* sent number of probes or announces, dependent on state */
+  u16_t ttw;                /* ticks to wait, tick is AUTOIP_TMR_INTERVAL long */
+  u8_t lastconflict;        /* ticks until a conflict can be solved by defending */
+  u8_t tried_llipaddr;      /* total number of probed/used Link Local IP-Addresses */
+};
+
+
+/** Init srand, has to be called before entering mainloop */
+void autoip_init(void);
+
+/** Start AutoIP client */
+err_t autoip_start(struct netif *netif);
+
+/** Stop AutoIP client */
+err_t autoip_stop(struct netif *netif);
+
+/** Handles every incoming ARP Packet, called by etharp_arp_input */
+void autoip_arp_reply(struct netif *netif, struct etharp_hdr *hdr);
+
+/** Has to be called in loop every AUTOIP_TMR_INTERVAL milliseconds */
+void autoip_tmr(void);
+
+#endif /* LWIP_AUTOIP */
+
+#endif /* __LWIP_AUTOIP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/icmp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/icmp.h
new file mode 100644
index 000000000..ff838f43a
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/icmp.h
@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_ICMP_H__
+#define __LWIP_ICMP_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ICMP_ER 0      /* echo reply */
+#define ICMP_DUR 3     /* destination unreachable */
+#define ICMP_SQ 4      /* source quench */
+#define ICMP_RD 5      /* redirect */
+#define ICMP_ECHO 8    /* echo */
+#define ICMP_TE 11     /* time exceeded */
+#define ICMP_PP 12     /* parameter problem */
+#define ICMP_TS 13     /* timestamp */
+#define ICMP_TSR 14    /* timestamp reply */
+#define ICMP_IRQ 15    /* information request */
+#define ICMP_IR 16     /* information reply */
+
+enum icmp_dur_type {
+  ICMP_DUR_NET = 0,    /* net unreachable */
+  ICMP_DUR_HOST = 1,   /* host unreachable */
+  ICMP_DUR_PROTO = 2,  /* protocol unreachable */
+  ICMP_DUR_PORT = 3,   /* port unreachable */
+  ICMP_DUR_FRAG = 4,   /* fragmentation needed and DF set */
+  ICMP_DUR_SR = 5      /* source route failed */
+};
+
+enum icmp_te_type {
+  ICMP_TE_TTL = 0,     /* time to live exceeded in transit */
+  ICMP_TE_FRAG = 1     /* fragment reassembly time exceeded */
+};
+
+void icmp_input(struct pbuf *p, struct netif *inp);
+
+void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
+void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+/** This is the standard ICMP header only that the u32_t data
+ *  is splitted to two u16_t like ICMP echo needs it.
+ *  This header is also used for other ICMP types that do not
+ *  use the data part.
+ */
+PACK_STRUCT_BEGIN
+struct icmp_echo_hdr {
+  PACK_STRUCT_FIELD(u8_t type);
+  PACK_STRUCT_FIELD(u8_t code);
+  PACK_STRUCT_FIELD(u16_t chksum);
+  PACK_STRUCT_FIELD(u16_t id);
+  PACK_STRUCT_FIELD(u16_t seqno);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#define ICMPH_TYPE(hdr) ((hdr)->type)
+#define ICMPH_CODE(hdr) ((hdr)->code)
+
+/** Combines type and code to an u16_t */
+#define ICMPH_TYPE_SET(hdr, t) ((hdr)->type = (t))
+#define ICMPH_CODE_SET(hdr, c) ((hdr)->code = (c))
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ICMP */
+
+#endif /* __LWIP_ICMP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/igmp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/igmp.h
new file mode 100644
index 000000000..59c933f35
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/igmp.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2002 CITEL Technologies Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 3. Neither the name of CITEL Technologies Ltd nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY CITEL TECHNOLOGIES AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL CITEL TECHNOLOGIES OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * This file is a contribution to the lwIP TCP/IP stack.
+ * The Swedish Institute of Computer Science and Adam Dunkels
+ * are specifically granted permission to redistribute this
+ * source code.
+*/
+
+#ifndef __LWIP_IGMP_H__
+#define __LWIP_IGMP_H__
+
+#include "lwip/opt.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/pbuf.h"
+
+#if LWIP_IGMP /* don't build if not configured for use in lwipopts.h */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* 
+ * IGMP constants
+ */
+#define IP_PROTO_IGMP                  2
+#define IGMP_TTL                       1
+#define IGMP_MINLEN                    8
+#define ROUTER_ALERT                   0x9404
+#define ROUTER_ALERTLEN                4
+
+/*
+ * IGMP message types, including version number.
+ */
+#define IGMP_MEMB_QUERY                0x11 /* Membership query         */
+#define IGMP_V1_MEMB_REPORT            0x12 /* Ver. 1 membership report */
+#define IGMP_V2_MEMB_REPORT            0x16 /* Ver. 2 membership report */
+#define IGMP_LEAVE_GROUP               0x17 /* Leave-group message      */
+
+/* IGMP timer */
+#define IGMP_TMR_INTERVAL              100 /* Milliseconds */
+#define IGMP_V1_DELAYING_MEMBER_TMR   (1000/IGMP_TMR_INTERVAL)
+#define IGMP_JOIN_DELAYING_MEMBER_TMR (500 /IGMP_TMR_INTERVAL)
+
+/* MAC Filter Actions */
+#define IGMP_DEL_MAC_FILTER            0
+#define IGMP_ADD_MAC_FILTER            1
+
+/* Group  membership states */
+#define IGMP_GROUP_NON_MEMBER          0
+#define IGMP_GROUP_DELAYING_MEMBER     1
+#define IGMP_GROUP_IDLE_MEMBER         2
+
+/*
+ * IGMP packet format.
+ */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct igmp_msg {
+ PACK_STRUCT_FIELD(u8_t           igmp_msgtype);
+ PACK_STRUCT_FIELD(u8_t           igmp_maxresp);
+ PACK_STRUCT_FIELD(u16_t          igmp_checksum);
+ PACK_STRUCT_FIELD(struct ip_addr igmp_group_address);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+/* 
+ * now a group structure - there is
+ * a list of groups for each interface
+ * these should really be linked from the interface, but
+ * if we keep them separate we will not affect the lwip original code
+ * too much
+ * 
+ * There will be a group for the all systems group address but this 
+ * will not run the state machine as it is used to kick off reports
+ * from all the other groups
+ */
+
+struct igmp_group {
+  struct igmp_group *next;
+  struct netif      *interface;
+  struct ip_addr     group_address;
+  u8_t               last_reporter_flag; /* signifies we were the last person to report */
+  u8_t               group_state;
+  u16_t              timer;
+  u8_t               use; /* counter of simultaneous uses */
+};
+
+
+/*  Prototypes */
+void   igmp_init(void);
+
+err_t  igmp_start( struct netif *netif);
+
+err_t  igmp_stop( struct netif *netif);
+
+void   igmp_report_groups( struct netif *netif);
+
+struct igmp_group *igmp_lookfor_group( struct netif *ifp, struct ip_addr *addr);
+
+struct igmp_group *igmp_lookup_group( struct netif *ifp, struct ip_addr *addr);
+
+err_t  igmp_remove_group( struct igmp_group *group);
+
+void   igmp_input( struct pbuf *p, struct netif *inp, struct ip_addr *dest);
+
+err_t  igmp_joingroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr);
+
+err_t  igmp_leavegroup( struct ip_addr *ifaddr, struct ip_addr *groupaddr);
+
+void   igmp_tmr(void);
+
+void   igmp_timeout( struct igmp_group *group);
+
+void   igmp_start_timer( struct igmp_group *group, u8_t max_time);
+
+void   igmp_stop_timer( struct igmp_group *group);
+
+void   igmp_delaying_member( struct igmp_group *group, u8_t maxresp);
+
+err_t  igmp_ip_output_if( struct pbuf *p, struct ip_addr *src, struct ip_addr *dest, u8_t ttl, u8_t proto, struct netif *netif);
+
+void   igmp_send( struct igmp_group *group, u8_t type);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_IGMP */
+
+#endif /* __LWIP_IGMP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/inet.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/inet.h
new file mode 100644
index 000000000..6f30d0d12
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/inet.h
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_INET_H__
+#define __LWIP_INET_H__
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* For compatibility with BSD code */
+struct in_addr {
+  u32_t s_addr;
+};
+
+#define INADDR_NONE         ((u32_t)0xffffffffUL)  /* 255.255.255.255 */
+#define INADDR_LOOPBACK     ((u32_t)0x7f000001UL)  /* 127.0.0.1 */
+#define INADDR_ANY          ((u32_t)0x00000000UL)  /* 0.0.0.0 */
+#define INADDR_BROADCAST    ((u32_t)0xffffffffUL)  /* 255.255.255.255 */
+
+u32_t inet_addr(const char *cp);
+int inet_aton(const char *cp, struct in_addr *addr);
+char *inet_ntoa(struct in_addr addr); /* returns ptr to static buffer; not reentrant! */
+
+#ifdef htons
+#undef htons
+#endif /* htons */
+#ifdef htonl
+#undef htonl
+#endif /* htonl */
+#ifdef ntohs
+#undef ntohs
+#endif /* ntohs */
+#ifdef ntohl
+#undef ntohl
+#endif /* ntohl */
+
+#ifndef LWIP_PLATFORM_BYTESWAP
+#define LWIP_PLATFORM_BYTESWAP 0
+#endif
+
+#if BYTE_ORDER == BIG_ENDIAN
+#define htons(x) (x)
+#define ntohs(x) (x)
+#define htonl(x) (x)
+#define ntohl(x) (x)
+#else /* BYTE_ORDER != BIG_ENDIAN */
+#ifdef LWIP_PREFIX_BYTEORDER_FUNCS
+/* workaround for naming collisions on some platforms */
+#define htons lwip_htons
+#define ntohs lwip_ntohs
+#define htonl lwip_htonl
+#define ntohl lwip_ntohl
+#endif /* LWIP_PREFIX_BYTEORDER_FUNCS */
+#if LWIP_PLATFORM_BYTESWAP
+#define htons(x) LWIP_PLATFORM_HTONS(x)
+#define ntohs(x) LWIP_PLATFORM_HTONS(x)
+#define htonl(x) LWIP_PLATFORM_HTONL(x)
+#define ntohl(x) LWIP_PLATFORM_HTONL(x)
+#else /* LWIP_PLATFORM_BYTESWAP */
+u16_t htons(u16_t x);
+u16_t ntohs(u16_t x);
+u32_t htonl(u32_t x);
+u32_t ntohl(u32_t x);
+#endif /* LWIP_PLATFORM_BYTESWAP */
+
+#endif /* BYTE_ORDER == BIG_ENDIAN */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_INET_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/inet_chksum.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/inet_chksum.h
new file mode 100644
index 000000000..5cae59cbd
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/inet_chksum.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_INET_CHKSUM_H__
+#define __LWIP_INET_CHKSUM_H__
+
+#include "lwip/opt.h"
+
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+u16_t inet_chksum(void *dataptr, u16_t len);
+u16_t inet_chksum_pbuf(struct pbuf *p);
+u16_t inet_chksum_pseudo(struct pbuf *p,
+       struct ip_addr *src, struct ip_addr *dest,
+       u8_t proto, u16_t proto_len);
+#if LWIP_UDPLITE
+u16_t inet_chksum_pseudo_partial(struct pbuf *p,
+       struct ip_addr *src, struct ip_addr *dest,
+       u8_t proto, u16_t proto_len, u16_t chksum_len);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_INET_H__ */
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip.h
new file mode 100644
index 000000000..14eba3ca5
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip.h
@@ -0,0 +1,187 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_IP_H__
+#define __LWIP_IP_H__
+
+#include "lwip/opt.h"
+
+#include "lwip/def.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Currently, the function ip_output_if_opt() is only used with IGMP */
+#define IP_OPTIONS_SEND   LWIP_IGMP
+
+#define IP_HLEN 20
+
+#define IP_PROTO_ICMP    1
+#define IP_PROTO_UDP     17
+#define IP_PROTO_UDPLITE 136
+#define IP_PROTO_TCP     6
+
+/* This is passed as the destination address to ip_output_if (not
+   to ip_output), meaning that an IP header already is constructed
+   in the pbuf. This is used when TCP retransmits. */
+#ifdef IP_HDRINCL
+#undef IP_HDRINCL
+#endif /* IP_HDRINCL */
+#define IP_HDRINCL  NULL
+
+#if LWIP_NETIF_HWADDRHINT
+#define IP_PCB_ADDRHINT ;u8_t addr_hint
+#else
+#define IP_PCB_ADDRHINT
+#endif /* LWIP_NETIF_HWADDRHINT */
+
+/* This is the common part of all PCB types. It needs to be at the
+   beginning of a PCB type definition. It is located here so that
+   changes to this common part are made in one location instead of
+   having to change all PCB structs. */
+#define IP_PCB \
+  /* ip addresses in network byte order */ \
+  struct ip_addr local_ip; \
+  struct ip_addr remote_ip; \
+   /* Socket options */  \
+  u16_t so_options;      \
+   /* Type Of Service */ \
+  u8_t tos;              \
+  /* Time To Live */     \
+  u8_t ttl               \
+  /* link layer address resolution hint */ \
+  IP_PCB_ADDRHINT
+
+struct ip_pcb {
+/* Common members of all PCB types */
+  IP_PCB;
+};
+
+/*
+ * Option flags per-socket. These are the same like SO_XXX.
+ */
+#define SOF_DEBUG       (u16_t)0x0001U    /* turn on debugging info recording */
+#define SOF_ACCEPTCONN  (u16_t)0x0002U    /* socket has had listen() */
+#define SOF_REUSEADDR   (u16_t)0x0004U    /* allow local address reuse */
+#define SOF_KEEPALIVE   (u16_t)0x0008U    /* keep connections alive */
+#define SOF_DONTROUTE   (u16_t)0x0010U    /* just use interface addresses */
+#define SOF_BROADCAST   (u16_t)0x0020U    /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
+#define SOF_USELOOPBACK (u16_t)0x0040U    /* bypass hardware when possible */
+#define SOF_LINGER      (u16_t)0x0080U    /* linger on close if data present */
+#define SOF_OOBINLINE   (u16_t)0x0100U    /* leave received OOB data in line */
+#define SOF_REUSEPORT   (u16_t)0x0200U    /* allow local address & port reuse */
+
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct ip_hdr {
+  /* version / header length / type of service */
+  PACK_STRUCT_FIELD(u16_t _v_hl_tos);
+  /* total length */
+  PACK_STRUCT_FIELD(u16_t _len);
+  /* identification */
+  PACK_STRUCT_FIELD(u16_t _id);
+  /* fragment offset field */
+  PACK_STRUCT_FIELD(u16_t _offset);
+#define IP_RF 0x8000        /* reserved fragment flag */
+#define IP_DF 0x4000        /* dont fragment flag */
+#define IP_MF 0x2000        /* more fragments flag */
+#define IP_OFFMASK 0x1fff   /* mask for fragmenting bits */
+  /* time to live / protocol*/
+  PACK_STRUCT_FIELD(u16_t _ttl_proto);
+  /* checksum */
+  PACK_STRUCT_FIELD(u16_t _chksum);
+  /* source and destination IP addresses */
+  PACK_STRUCT_FIELD(struct ip_addr src);
+  PACK_STRUCT_FIELD(struct ip_addr dest); 
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#define IPH_V(hdr)  (ntohs((hdr)->_v_hl_tos) >> 12)
+#define IPH_HL(hdr) ((ntohs((hdr)->_v_hl_tos) >> 8) & 0x0f)
+#define IPH_TOS(hdr) (ntohs((hdr)->_v_hl_tos) & 0xff)
+#define IPH_LEN(hdr) ((hdr)->_len)
+#define IPH_ID(hdr) ((hdr)->_id)
+#define IPH_OFFSET(hdr) ((hdr)->_offset)
+#define IPH_TTL(hdr) (ntohs((hdr)->_ttl_proto) >> 8)
+#define IPH_PROTO(hdr) (ntohs((hdr)->_ttl_proto) & 0xff)
+#define IPH_CHKSUM(hdr) ((hdr)->_chksum)
+
+#define IPH_VHLTOS_SET(hdr, v, hl, tos) (hdr)->_v_hl_tos = (htons(((v) << 12) | ((hl) << 8) | (tos)))
+#define IPH_LEN_SET(hdr, len) (hdr)->_len = (len)
+#define IPH_ID_SET(hdr, id) (hdr)->_id = (id)
+#define IPH_OFFSET_SET(hdr, off) (hdr)->_offset = (off)
+#define IPH_TTL_SET(hdr, ttl) (hdr)->_ttl_proto = (htons(IPH_PROTO(hdr) | ((u16_t)(ttl) << 8)))
+#define IPH_PROTO_SET(hdr, proto) (hdr)->_ttl_proto = (htons((proto) | (IPH_TTL(hdr) << 8)))
+#define IPH_CHKSUM_SET(hdr, chksum) (hdr)->_chksum = (chksum)
+
+#define ip_init() /* Compatibility define, not init needed. */
+struct netif *ip_route(struct ip_addr *dest);
+err_t ip_input(struct pbuf *p, struct netif *inp);
+err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+       u8_t ttl, u8_t tos, u8_t proto);
+err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+       u8_t ttl, u8_t tos, u8_t proto,
+       struct netif *netif);
+#if LWIP_NETIF_HWADDRHINT
+err_t ip_output_hinted(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+       u8_t ttl, u8_t tos, u8_t proto, u8_t *addr_hint);
+#endif /* LWIP_NETIF_HWADDRHINT */
+#if IP_OPTIONS_SEND
+err_t ip_output_if_opt(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+       u8_t ttl, u8_t tos, u8_t proto, struct netif *netif, void *ip_options,
+       u16_t optlen);
+#endif /* IP_OPTIONS_SEND */
+struct netif *ip_current_netif(void);
+const struct ip_hdr *ip_current_header(void);
+#if IP_DEBUG
+void ip_debug_print(struct pbuf *p);
+#else
+#define ip_debug_print(p)
+#endif /* IP_DEBUG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_IP_H__ */
+
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip_addr.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip_addr.h
new file mode 100644
index 000000000..f2e4c2233
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip_addr.h
@@ -0,0 +1,168 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_IP_ADDR_H__
+#define __LWIP_IP_ADDR_H__
+
+#include "lwip/opt.h"
+
+#include "lwip/inet.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct ip_addr {
+  PACK_STRUCT_FIELD(u32_t addr);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+/*
+ * struct ipaddr2 is used in the definition of the ARP packet format in
+ * order to support compilers that don't have structure packing.
+ */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct ip_addr2 {
+  PACK_STRUCT_FIELD(u16_t addrw[2]);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+struct netif;
+
+extern const struct ip_addr ip_addr_any;
+extern const struct ip_addr ip_addr_broadcast;
+
+/** IP_ADDR_ can be used as a fixed IP address
+ *  for the wildcard and the broadcast address
+ */
+#define IP_ADDR_ANY         ((struct ip_addr *)&ip_addr_any)
+#define IP_ADDR_BROADCAST   ((struct ip_addr *)&ip_addr_broadcast)
+
+/* Definitions of the bits in an Internet address integer.
+
+   On subnets, host and network parts are found according to
+   the subnet mask, not these masks.  */
+
+#define IN_CLASSA(a)        ((((u32_t)(a)) & 0x80000000UL) == 0)
+#define IN_CLASSA_NET       0xff000000
+#define IN_CLASSA_NSHIFT    24
+#define IN_CLASSA_HOST      (0xffffffff & ~IN_CLASSA_NET)
+#define IN_CLASSA_MAX       128
+
+#define IN_CLASSB(a)        ((((u32_t)(a)) & 0xc0000000UL) == 0x80000000UL)
+#define IN_CLASSB_NET       0xffff0000
+#define IN_CLASSB_NSHIFT    16
+#define IN_CLASSB_HOST      (0xffffffff & ~IN_CLASSB_NET)
+#define IN_CLASSB_MAX       65536
+
+#define IN_CLASSC(a)        ((((u32_t)(a)) & 0xe0000000UL) == 0xc0000000UL)
+#define IN_CLASSC_NET       0xffffff00
+#define IN_CLASSC_NSHIFT    8
+#define IN_CLASSC_HOST      (0xffffffff & ~IN_CLASSC_NET)
+
+#define IN_CLASSD(a)        (((u32_t)(a) & 0xf0000000UL) == 0xe0000000UL)
+#define IN_CLASSD_NET       0xf0000000          /* These ones aren't really */
+#define IN_CLASSD_NSHIFT    28                  /*   net and host fields, but */
+#define IN_CLASSD_HOST      0x0fffffff          /*   routing needn't know. */
+#define IN_MULTICAST(a)     IN_CLASSD(a)
+
+#define IN_EXPERIMENTAL(a)  (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
+#define IN_BADCLASS(a)      (((u32_t)(a) & 0xf0000000UL) == 0xf0000000UL)
+
+#define IN_LOOPBACKNET      127                 /* official! */
+
+#define IP4_ADDR(ipaddr, a,b,c,d) \
+        (ipaddr)->addr = htonl(((u32_t)((a) & 0xff) << 24) | \
+                               ((u32_t)((b) & 0xff) << 16) | \
+                               ((u32_t)((c) & 0xff) << 8) | \
+                                (u32_t)((d) & 0xff))
+
+#define ip_addr_set(dest, src) (dest)->addr = \
+                               ((src) == NULL? 0:\
+                               (src)->addr)
+/**
+ * Determine if two address are on the same network.
+ *
+ * @arg addr1 IP address 1
+ * @arg addr2 IP address 2
+ * @arg mask network identifier mask
+ * @return !0 if the network identifiers of both address match
+ */
+#define ip_addr_netcmp(addr1, addr2, mask) (((addr1)->addr & \
+                                              (mask)->addr) == \
+                                             ((addr2)->addr & \
+                                              (mask)->addr))
+#define ip_addr_cmp(addr1, addr2) ((addr1)->addr == (addr2)->addr)
+
+#define ip_addr_isany(addr1) ((addr1) == NULL || (addr1)->addr == 0)
+
+u8_t ip_addr_isbroadcast(struct ip_addr *, struct netif *);
+
+#define ip_addr_ismulticast(addr1) (((addr1)->addr & ntohl(0xf0000000UL)) == ntohl(0xe0000000UL))
+
+#define ip_addr_islinklocal(addr1) (((addr1)->addr & ntohl(0xffff0000UL)) == ntohl(0xa9fe0000UL))
+
+#define ip_addr_debug_print(debug, ipaddr) \
+  LWIP_DEBUGF(debug, ("%"U16_F".%"U16_F".%"U16_F".%"U16_F,              \
+                      ipaddr != NULL ?                                  \
+                      (u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff : 0,  \
+                      ipaddr != NULL ?                                  \
+                      (u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff : 0,  \
+                      ipaddr != NULL ?                                  \
+                      (u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff : 0,   \
+                      ipaddr != NULL ?                                  \
+                      (u16_t)ntohl((ipaddr)->addr) & 0xff : 0))
+
+/* These are cast to u16_t, with the intent that they are often arguments
+ * to printf using the U16_F format from cc.h. */
+#define ip4_addr1(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 24) & 0xff)
+#define ip4_addr2(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 16) & 0xff)
+#define ip4_addr3(ipaddr) ((u16_t)(ntohl((ipaddr)->addr) >> 8) & 0xff)
+#define ip4_addr4(ipaddr) ((u16_t)(ntohl((ipaddr)->addr)) & 0xff)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_IP_ADDR_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip_frag.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip_frag.h
new file mode 100644
index 000000000..380e604dc
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv4/lwip/ip_frag.h
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Jani Monoses <jani@iv.ro>
+ *
+ */
+
+#ifndef __LWIP_IP_FRAG_H__
+#define __LWIP_IP_FRAG_H__
+
+#include "lwip/opt.h"
+#include "lwip/err.h"
+#include "lwip/pbuf.h"
+#include "lwip/netif.h"
+#include "lwip/ip_addr.h"
+#include "lwip/ip.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if IP_REASSEMBLY
+/* The IP reassembly timer interval in milliseconds. */
+#define IP_TMR_INTERVAL 1000
+
+/* IP reassembly helper struct.
+ * This is exported because memp needs to know the size.
+ */
+struct ip_reassdata {
+  struct ip_reassdata *next;
+  struct pbuf *p;
+  struct ip_hdr iphdr;
+  u16_t datagram_len;
+  u8_t flags;
+  u8_t timer;
+};
+
+void ip_reass_init(void);
+void ip_reass_tmr(void);
+struct pbuf * ip_reass(struct pbuf *p);
+#endif /* IP_REASSEMBLY */
+
+#if IP_FRAG
+err_t ip_frag(struct pbuf *p, struct netif *netif, struct ip_addr *dest);
+#endif /* IP_FRAG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_IP_FRAG_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/icmp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/icmp.h
new file mode 100644
index 000000000..87e9ffd96
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/icmp.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_ICMP_H__
+#define __LWIP_ICMP_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_ICMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ICMP6_DUR  1
+#define ICMP6_TE   3
+#define ICMP6_ECHO 128    /* echo */
+#define ICMP6_ER   129      /* echo reply */
+
+
+enum icmp_dur_type {
+  ICMP_DUR_NET = 0,    /* net unreachable */
+  ICMP_DUR_HOST = 1,   /* host unreachable */
+  ICMP_DUR_PROTO = 2,  /* protocol unreachable */
+  ICMP_DUR_PORT = 3,   /* port unreachable */
+  ICMP_DUR_FRAG = 4,   /* fragmentation needed and DF set */
+  ICMP_DUR_SR = 5      /* source route failed */
+};
+
+enum icmp_te_type {
+  ICMP_TE_TTL = 0,     /* time to live exceeded in transit */
+  ICMP_TE_FRAG = 1     /* fragment reassembly time exceeded */
+};
+
+void icmp_input(struct pbuf *p, struct netif *inp);
+
+void icmp_dest_unreach(struct pbuf *p, enum icmp_dur_type t);
+void icmp_time_exceeded(struct pbuf *p, enum icmp_te_type t);
+
+struct icmp_echo_hdr {
+  u8_t type;
+  u8_t icode;
+  u16_t chksum;
+  u16_t id;
+  u16_t seqno;
+};
+
+struct icmp_dur_hdr {
+  u8_t type;
+  u8_t icode;
+  u16_t chksum;
+  u32_t unused;
+};
+
+struct icmp_te_hdr {
+  u8_t type;
+  u8_t icode;
+  u16_t chksum;
+  u32_t unused;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ICMP */
+
+#endif /* __LWIP_ICMP_H__ */
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/inet.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/inet.h
new file mode 100644
index 000000000..de1a0b636
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/inet.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_INET_H__
+#define __LWIP_INET_H__
+
+#include "lwip/opt.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+u16_t inet_chksum(void *data, u16_t len);
+u16_t inet_chksum_pbuf(struct pbuf *p);
+u16_t inet_chksum_pseudo(struct pbuf *p,
+       struct ip_addr *src, struct ip_addr *dest,
+       u8_t proto, u32_t proto_len);
+
+u32_t inet_addr(const char *cp);
+s8_t inet_aton(const char *cp, struct in_addr *addr);
+
+#ifndef _MACHINE_ENDIAN_H_
+#ifndef _NETINET_IN_H
+#ifndef _LINUX_BYTEORDER_GENERIC_H
+u16_t htons(u16_t n);
+u16_t ntohs(u16_t n);
+u32_t htonl(u32_t n);
+u32_t ntohl(u32_t n);
+#endif /* _LINUX_BYTEORDER_GENERIC_H */
+#endif /* _NETINET_IN_H */
+#endif /* _MACHINE_ENDIAN_H_ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_INET_H__ */
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/ip.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/ip.h
new file mode 100644
index 000000000..a01cfc65b
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/ip.h
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_IP_H__
+#define __LWIP_IP_H__
+
+#include "lwip/opt.h"
+#include "lwip/def.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define IP_HLEN 40
+
+#define IP_PROTO_ICMP    58
+#define IP_PROTO_UDP     17
+#define IP_PROTO_UDPLITE 136
+#define IP_PROTO_TCP     6
+
+/* This is passed as the destination address to ip_output_if (not
+   to ip_output), meaning that an IP header already is constructed
+   in the pbuf. This is used when TCP retransmits. */
+#ifdef IP_HDRINCL
+#undef IP_HDRINCL
+#endif /* IP_HDRINCL */
+#define IP_HDRINCL  NULL
+
+#if LWIP_NETIF_HWADDRHINT
+#define IP_PCB_ADDRHINT ;u8_t addr_hint
+#else
+#define IP_PCB_ADDRHINT
+#endif /* LWIP_NETIF_HWADDRHINT */
+
+/* This is the common part of all PCB types. It needs to be at the
+   beginning of a PCB type definition. It is located here so that
+   changes to this common part are made in one location instead of
+   having to change all PCB structs. */
+#define IP_PCB struct ip_addr local_ip; \
+  struct ip_addr remote_ip; \
+   /* Socket options */  \
+  u16_t so_options;      \
+   /* Type Of Service */ \
+  u8_t tos;              \
+  /* Time To Live */     \
+  u8_t ttl;              \
+  /* link layer address resolution hint */ \
+  IP_PCB_ADDRHINT
+
+
+/* The IPv6 header. */
+struct ip_hdr {
+#if BYTE_ORDER == LITTLE_ENDIAN
+  u8_t tclass1:4, v:4;
+  u8_t flow1:4, tclass2:4;  
+#else
+  u8_t v:4, tclass1:4;
+  u8_t tclass2:8, flow1:4;
+#endif
+  u16_t flow2;
+  u16_t len;                /* payload length */
+  u8_t nexthdr;             /* next header */
+  u8_t hoplim;              /* hop limit (TTL) */
+  struct ip_addr src, dest;          /* source and destination IP addresses */
+};
+
+#define IPH_PROTO(hdr) (iphdr->nexthdr)
+
+void ip_init(void);
+
+#include "lwip/netif.h"
+
+struct netif *ip_route(struct ip_addr *dest);
+
+void ip_input(struct pbuf *p, struct netif *inp);
+
+/* source and destination addresses in network byte order, please */
+err_t ip_output(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+         u8_t ttl, u8_t proto);
+
+err_t ip_output_if(struct pbuf *p, struct ip_addr *src, struct ip_addr *dest,
+      u8_t ttl, u8_t proto,
+      struct netif *netif);
+
+#define ip_current_netif() NULL
+#define ip_current_header() NULL
+
+#if IP_DEBUG
+void ip_debug_print(struct pbuf *p);
+#endif /* IP_DEBUG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_IP_H__ */
+
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/ip_addr.h b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/ip_addr.h
new file mode 100644
index 000000000..b2d8ae566
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/ipv6/lwip/ip_addr.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_IP_ADDR_H__
+#define __LWIP_IP_ADDR_H__
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define IP_ADDR_ANY 0
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+ struct ip_addr {
+  PACK_STRUCT_FIELD(u32_t addr[4]);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+/*
+ * struct ipaddr2 is used in the definition of the ARP packet format in
+ * order to support compilers that don't have structure packing.
+ */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct ip_addr2 {
+  PACK_STRUCT_FIELD(u16_t addrw[2]);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#define IP6_ADDR(ipaddr, a,b,c,d,e,f,g,h) do { (ipaddr)->addr[0] = htonl((u32_t)((a & 0xffff) << 16) | (b & 0xffff)); \
+                                               (ipaddr)->addr[1] = htonl(((c & 0xffff) << 16) | (d & 0xffff)); \
+                                               (ipaddr)->addr[2] = htonl(((e & 0xffff) << 16) | (f & 0xffff)); \
+                                               (ipaddr)->addr[3] = htonl(((g & 0xffff) << 16) | (h & 0xffff)); } while(0)
+
+u8_t ip_addr_netcmp(struct ip_addr *addr1, struct ip_addr *addr2,
+        struct ip_addr *mask);
+u8_t ip_addr_cmp(struct ip_addr *addr1, struct ip_addr *addr2);
+void ip_addr_set(struct ip_addr *dest, struct ip_addr *src);
+u8_t ip_addr_isany(struct ip_addr *addr);
+
+#define ip_addr_debug_print(debug, ipaddr) \
+        LWIP_DEBUGF(debug, ("%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F":%"X32_F"\n", \
+         (ntohl(ipaddr->addr[0]) >> 16) & 0xffff, \
+         ntohl(ipaddr->addr[0]) & 0xffff, \
+         (ntohl(ipaddr->addr[1]) >> 16) & 0xffff, \
+         ntohl(ipaddr->addr[1]) & 0xffff, \
+         (ntohl(ipaddr->addr[2]) >> 16) & 0xffff, \
+         ntohl(ipaddr->addr[2]) & 0xffff, \
+         (ntohl(ipaddr->addr[3]) >> 16) & 0xffff, \
+         ntohl(ipaddr->addr[3]) & 0xffff));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_IP_ADDR_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/api.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/api.h
new file mode 100644
index 000000000..f6b1f7434
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/api.h
@@ -0,0 +1,222 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_API_H__
+#define __LWIP_API_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include <stddef.h> /* for size_t */
+
+#include "lwip/netbuf.h"
+#include "lwip/sys.h"
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Throughout this file, IP addresses and port numbers are expected to be in
+ * the same byte order as in the corresponding pcb.
+ */
+
+/* Flags for netconn_write */
+#define NETCONN_NOFLAG 0x00
+#define NETCONN_NOCOPY 0x00 /* Only for source code compatibility */
+#define NETCONN_COPY   0x01
+#define NETCONN_MORE   0x02
+
+/* Helpers to process several netconn_types by the same code */
+#define NETCONNTYPE_GROUP(t)    (t&0xF0)
+#define NETCONNTYPE_DATAGRAM(t) (t&0xE0)
+
+enum netconn_type {
+  NETCONN_INVALID    = 0,
+  /* NETCONN_TCP Group */
+  NETCONN_TCP        = 0x10,
+  /* NETCONN_UDP Group */
+  NETCONN_UDP        = 0x20,
+  NETCONN_UDPLITE    = 0x21,
+  NETCONN_UDPNOCHKSUM= 0x22,
+  /* NETCONN_RAW Group */
+  NETCONN_RAW        = 0x40
+};
+
+enum netconn_state {
+  NETCONN_NONE,
+  NETCONN_WRITE,
+  NETCONN_LISTEN,
+  NETCONN_CONNECT,
+  NETCONN_CLOSE
+};
+
+enum netconn_evt {
+  NETCONN_EVT_RCVPLUS,
+  NETCONN_EVT_RCVMINUS,
+  NETCONN_EVT_SENDPLUS,
+  NETCONN_EVT_SENDMINUS
+};
+
+#if LWIP_IGMP
+enum netconn_igmp {
+  NETCONN_JOIN,
+  NETCONN_LEAVE
+};
+#endif /* LWIP_IGMP */
+
+/* forward-declare some structs to avoid to include their headers */
+struct ip_pcb;
+struct tcp_pcb;
+struct udp_pcb;
+struct raw_pcb;
+struct netconn;
+
+/** A callback prototype to inform about events for a netconn */
+typedef void (* netconn_callback)(struct netconn *, enum netconn_evt, u16_t len);
+
+/** A netconn descriptor */
+struct netconn {
+  /** type of the netconn (TCP, UDP or RAW) */
+  enum netconn_type type;
+  /** current state of the netconn */
+  enum netconn_state state;
+  /** the lwIP internal protocol control block */
+  union {
+    struct ip_pcb  *ip;
+    struct tcp_pcb *tcp;
+    struct udp_pcb *udp;
+    struct raw_pcb *raw;
+  } pcb;
+  /** the last error this netconn had */
+  err_t err;
+  /** sem that is used to synchroneously execute functions in the core context */
+  sys_sem_t op_completed;
+  /** mbox where received packets are stored until they are fetched
+      by the netconn application thread (can grow quite big) */
+  sys_mbox_t recvmbox;
+  /** mbox where new connections are stored until processed
+      by the application thread */
+  sys_mbox_t acceptmbox;
+  /** only used for socket layer */
+  int socket;
+#if LWIP_SO_RCVTIMEO
+  /** timeout to wait for new data to be received
+      (or connections to arrive for listening netconns) */
+  int recv_timeout;
+#endif /* LWIP_SO_RCVTIMEO */
+#if LWIP_SO_RCVBUF
+  /** maximum amount of bytes queued in recvmbox */
+  int recv_bufsize;
+#endif /* LWIP_SO_RCVBUF */
+  s16_t recv_avail;
+#if LWIP_TCP
+  /** TCP: when data passed to netconn_write doesn't fit into the send buffer,
+      this temporarily stores the message. */
+  struct api_msg_msg *write_msg;
+  /** TCP: when data passed to netconn_write doesn't fit into the send buffer,
+      this temporarily stores how much is already sent. */
+  size_t write_offset;
+#if LWIP_TCPIP_CORE_LOCKING
+  /** TCP: when data passed to netconn_write doesn't fit into the send buffer,
+      this temporarily stores whether to wake up the original application task
+      if data couldn't be sent in the first try. */
+  u8_t write_delayed;
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+#endif /* LWIP_TCP */
+  /** A callback function that is informed about events for this netconn */
+  netconn_callback callback;
+};
+
+/* Register an Network connection event */
+#define API_EVENT(c,e,l) if (c->callback) {         \
+                           (*c->callback)(c, e, l); \
+                         }
+
+/* Network connection functions: */
+#define netconn_new(t)                  netconn_new_with_proto_and_callback(t, 0, NULL)
+#define netconn_new_with_callback(t, c) netconn_new_with_proto_and_callback(t, 0, c)
+struct
+netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto,
+                                   netconn_callback callback);
+err_t             netconn_delete  (struct netconn *conn);
+/** Get the type of a netconn (as enum netconn_type). */
+#define netconn_type(conn) (conn->type)
+
+err_t             netconn_getaddr (struct netconn *conn,
+                                   struct ip_addr *addr,
+                                   u16_t *port,
+                                   u8_t local);
+#define netconn_peer(c,i,p) netconn_getaddr(c,i,p,0)
+#define netconn_addr(c,i,p) netconn_getaddr(c,i,p,1)
+
+err_t             netconn_bind    (struct netconn *conn,
+                                   struct ip_addr *addr,
+                                   u16_t port);
+err_t             netconn_connect (struct netconn *conn,
+                                   struct ip_addr *addr,
+                                   u16_t port);
+err_t             netconn_disconnect (struct netconn *conn);
+err_t             netconn_listen_with_backlog(struct netconn *conn, u8_t backlog);
+#define netconn_listen(conn) netconn_listen_with_backlog(conn, TCP_DEFAULT_LISTEN_BACKLOG)
+struct netconn *  netconn_accept  (struct netconn *conn);
+struct netbuf *   netconn_recv    (struct netconn *conn);
+err_t             netconn_sendto  (struct netconn *conn,
+                                   struct netbuf *buf, struct ip_addr *addr, u16_t port);
+err_t             netconn_send    (struct netconn *conn,
+                                   struct netbuf *buf);
+err_t             netconn_write   (struct netconn *conn,
+                                   const void *dataptr, size_t size,
+                                   u8_t apiflags);
+err_t             netconn_close   (struct netconn *conn);
+
+#if LWIP_IGMP
+err_t             netconn_join_leave_group (struct netconn *conn,
+                                            struct ip_addr *multiaddr,
+                                            struct ip_addr *interface,
+                                            enum netconn_igmp join_or_leave);
+#endif /* LWIP_IGMP */
+#if LWIP_DNS
+err_t             netconn_gethostbyname(const char *name, struct ip_addr *addr);
+#endif /* LWIP_DNS */
+
+#define netconn_err(conn)          ((conn)->err)
+#define netconn_recv_bufsize(conn) ((conn)->recv_bufsize)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_NETCONN */
+
+#endif /* __LWIP_API_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/api_msg.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/api_msg.h
new file mode 100644
index 000000000..4272d77cc
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/api_msg.h
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_API_MSG_H__
+#define __LWIP_API_MSG_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
+
+#include <stddef.h> /* for size_t */
+
+#include "lwip/ip_addr.h"
+#include "lwip/err.h"
+#include "lwip/sys.h"
+#include "lwip/igmp.h"
+#include "lwip/api.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* IP addresses and port numbers are expected to be in
+ * the same byte order as in the corresponding pcb.
+ */
+/** This struct includes everything that is necessary to execute a function
+    for a netconn in another thread context (mainly used to process netconns
+    in the tcpip_thread context to be thread safe). */
+struct api_msg_msg {
+  /** The netconn which to process - always needed: it includes the semaphore
+      which is used to block the application thread until the function finished. */
+  struct netconn *conn;
+  /** Depending on the executed function, one of these union members is used */
+  union {
+    /** used for do_send */
+    struct netbuf *b;
+    /** used for do_newconn */
+    struct {
+      u8_t proto;
+    } n;
+    /** used for do_bind and do_connect */
+    struct {
+      struct ip_addr *ipaddr;
+      u16_t port;
+    } bc;
+    /** used for do_getaddr */
+    struct {
+      struct ip_addr *ipaddr;
+      u16_t *port;
+      u8_t local;
+    } ad;
+    /** used for do_write */
+    struct {
+      const void *dataptr;
+      size_t len;
+      u8_t apiflags;
+    } w;
+    /** used ofr do_recv */
+    struct {
+      u16_t len;
+    } r;
+#if LWIP_IGMP
+    /** used for do_join_leave_group */
+    struct {
+      struct ip_addr *multiaddr;
+      struct ip_addr *interface;
+      enum netconn_igmp join_or_leave;
+    } jl;
+#endif /* LWIP_IGMP */
+#if TCP_LISTEN_BACKLOG
+    struct {
+      u8_t backlog;
+    } lb;
+#endif /* TCP_LISTEN_BACKLOG */
+  } msg;
+};
+
+/** This struct contains a function to execute in another thread context and
+    a struct api_msg_msg that serves as an argument for this function.
+    This is passed to tcpip_apimsg to execute functions in tcpip_thread context. */
+struct api_msg {
+  /** function to execute in tcpip_thread context */
+  void (* function)(struct api_msg_msg *msg);
+  /** arguments for this function */
+  struct api_msg_msg msg;
+};
+
+#if LWIP_DNS
+/** As do_gethostbyname requires more arguments but doesn't require a netconn,
+    it has its own struct (to avoid struct api_msg getting bigger than necessary).
+    do_gethostbyname must be called using tcpip_callback instead of tcpip_apimsg
+    (see netconn_gethostbyname). */
+struct dns_api_msg {
+  /** Hostname to query or dotted IP address string */
+  const char *name;
+  /** Rhe resolved address is stored here */
+  struct ip_addr *addr;
+  /** This semaphore is posted when the name is resolved, the application thread
+      should wait on it. */
+  sys_sem_t sem;
+  /** Errors are given back here */
+  err_t *err;
+};
+#endif /* LWIP_DNS */
+
+void do_newconn         ( struct api_msg_msg *msg);
+void do_delconn         ( struct api_msg_msg *msg);
+void do_bind            ( struct api_msg_msg *msg);
+void do_connect         ( struct api_msg_msg *msg);
+void do_disconnect      ( struct api_msg_msg *msg);
+void do_listen          ( struct api_msg_msg *msg);
+void do_send            ( struct api_msg_msg *msg);
+void do_recv            ( struct api_msg_msg *msg);
+void do_write           ( struct api_msg_msg *msg);
+void do_getaddr         ( struct api_msg_msg *msg);
+void do_close           ( struct api_msg_msg *msg);
+#if LWIP_IGMP
+void do_join_leave_group( struct api_msg_msg *msg);
+#endif /* LWIP_IGMP */
+
+#if LWIP_DNS
+void do_gethostbyname(void *arg);
+#endif /* LWIP_DNS */
+
+struct netconn* netconn_alloc(enum netconn_type t, netconn_callback callback);
+void netconn_free(struct netconn *conn);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_NETCONN */
+
+#endif /* __LWIP_API_MSG_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/arch.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/arch.h
new file mode 100644
index 000000000..3a5a0e4f2
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/arch.h
@@ -0,0 +1,233 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_ARCH_H__
+#define __LWIP_ARCH_H__
+
+#ifndef LITTLE_ENDIAN
+#define LITTLE_ENDIAN 1234
+#endif
+
+#ifndef BIG_ENDIAN
+#define BIG_ENDIAN 4321
+#endif
+
+#include "arch/cc.h"
+
+/** Temporary: define format string for size_t if not defined in cc.h */
+#ifndef SZT_F
+#define SZT_F U32_F
+#endif /* SZT_F */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef PACK_STRUCT_BEGIN
+#define PACK_STRUCT_BEGIN
+#endif /* PACK_STRUCT_BEGIN */
+
+#ifndef PACK_STRUCT_END
+#define PACK_STRUCT_END
+#endif /* PACK_STRUCT_END */
+
+#ifndef PACK_STRUCT_FIELD
+#define PACK_STRUCT_FIELD(x) x
+#endif /* PACK_STRUCT_FIELD */
+
+
+#ifndef LWIP_UNUSED_ARG
+#define LWIP_UNUSED_ARG(x) (void)x
+#endif /* LWIP_UNUSED_ARG */ 
+
+
+#ifdef LWIP_PROVIDE_ERRNO
+
+#define  EPERM     1  /* Operation not permitted */
+#define  ENOENT     2  /* No such file or directory */
+#define  ESRCH     3  /* No such process */
+#define  EINTR     4  /* Interrupted system call */
+#define  EIO     5  /* I/O error */
+#define  ENXIO     6  /* No such device or address */
+#define  E2BIG     7  /* Arg list too long */
+#define  ENOEXEC     8  /* Exec format error */
+#define  EBADF     9  /* Bad file number */
+#define  ECHILD    10  /* No child processes */
+#define  EAGAIN    11  /* Try again */
+#define  ENOMEM    12  /* Out of memory */
+#define  EACCES    13  /* Permission denied */
+#define  EFAULT    14  /* Bad address */
+#define  ENOTBLK    15  /* Block device required */
+#define  EBUSY    16  /* Device or resource busy */
+#define  EEXIST    17  /* File exists */
+#define  EXDEV    18  /* Cross-device link */
+#define  ENODEV    19  /* No such device */
+#define  ENOTDIR    20  /* Not a directory */
+#define  EISDIR    21  /* Is a directory */
+#define  EINVAL    22  /* Invalid argument */
+#define  ENFILE    23  /* File table overflow */
+#define  EMFILE    24  /* Too many open files */
+#define  ENOTTY    25  /* Not a typewriter */
+#define  ETXTBSY    26  /* Text file busy */
+#define  EFBIG    27  /* File too large */
+#define  ENOSPC    28  /* No space left on device */
+#define  ESPIPE    29  /* Illegal seek */
+#define  EROFS    30  /* Read-only file system */
+#define  EMLINK    31  /* Too many links */
+#define  EPIPE    32  /* Broken pipe */
+#define  EDOM    33  /* Math argument out of domain of func */
+#define  ERANGE    34  /* Math result not representable */
+#define  EDEADLK    35  /* Resource deadlock would occur */
+#define  ENAMETOOLONG  36  /* File name too long */
+#define  ENOLCK    37  /* No record locks available */
+#define  ENOSYS    38  /* Function not implemented */
+#define  ENOTEMPTY  39  /* Directory not empty */
+#define  ELOOP    40  /* Too many symbolic links encountered */
+#define  EWOULDBLOCK  EAGAIN  /* Operation would block */
+#define  ENOMSG    42  /* No message of desired type */
+#define  EIDRM    43  /* Identifier removed */
+#define  ECHRNG    44  /* Channel number out of range */
+#define  EL2NSYNC  45  /* Level 2 not synchronized */
+#define  EL3HLT    46  /* Level 3 halted */
+#define  EL3RST    47  /* Level 3 reset */
+#define  ELNRNG    48  /* Link number out of range */
+#define  EUNATCH    49  /* Protocol driver not attached */
+#define  ENOCSI    50  /* No CSI structure available */
+#define  EL2HLT    51  /* Level 2 halted */
+#define  EBADE    52  /* Invalid exchange */
+#define  EBADR    53  /* Invalid request descriptor */
+#define  EXFULL    54  /* Exchange full */
+#define  ENOANO    55  /* No anode */
+#define  EBADRQC    56  /* Invalid request code */
+#define  EBADSLT    57  /* Invalid slot */
+
+#define  EDEADLOCK  EDEADLK
+
+#define  EBFONT    59  /* Bad font file format */
+#define  ENOSTR    60  /* Device not a stream */
+#define  ENODATA    61  /* No data available */
+#define  ETIME    62  /* Timer expired */
+#define  ENOSR    63  /* Out of streams resources */
+#define  ENONET    64  /* Machine is not on the network */
+#define  ENOPKG    65  /* Package not installed */
+#define  EREMOTE    66  /* Object is remote */
+#define  ENOLINK    67  /* Link has been severed */
+#define  EADV    68  /* Advertise error */
+#define  ESRMNT    69  /* Srmount error */
+#define  ECOMM    70  /* Communication error on send */
+#define  EPROTO    71  /* Protocol error */
+#define  EMULTIHOP  72  /* Multihop attempted */
+#define  EDOTDOT    73  /* RFS specific error */
+#define  EBADMSG    74  /* Not a data message */
+#define  EOVERFLOW  75  /* Value too large for defined data type */
+#define  ENOTUNIQ  76  /* Name not unique on network */
+#define  EBADFD    77  /* File descriptor in bad state */
+#define  EREMCHG    78  /* Remote address changed */
+#define  ELIBACC    79  /* Can not access a needed shared library */
+#define  ELIBBAD    80  /* Accessing a corrupted shared library */
+#define  ELIBSCN    81  /* .lib section in a.out corrupted */
+#define  ELIBMAX    82  /* Attempting to link in too many shared libraries */
+#define  ELIBEXEC  83  /* Cannot exec a shared library directly */
+#define  EILSEQ    84  /* Illegal byte sequence */
+#define  ERESTART  85  /* Interrupted system call should be restarted */
+#define  ESTRPIPE  86  /* Streams pipe error */
+#define  EUSERS    87  /* Too many users */
+#define  ENOTSOCK  88  /* Socket operation on non-socket */
+#define  EDESTADDRREQ  89  /* Destination address required */
+#define  EMSGSIZE  90  /* Message too long */
+#define  EPROTOTYPE  91  /* Protocol wrong type for socket */
+#define  ENOPROTOOPT  92  /* Protocol not available */
+#define  EPROTONOSUPPORT  93  /* Protocol not supported */
+#define  ESOCKTNOSUPPORT  94  /* Socket type not supported */
+#define  EOPNOTSUPP  95  /* Operation not supported on transport endpoint */
+#define  EPFNOSUPPORT  96  /* Protocol family not supported */
+#define  EAFNOSUPPORT  97  /* Address family not supported by protocol */
+#define  EADDRINUSE  98  /* Address already in use */
+#define  EADDRNOTAVAIL  99  /* Cannot assign requested address */
+#define  ENETDOWN  100  /* Network is down */
+#define  ENETUNREACH  101  /* Network is unreachable */
+#define  ENETRESET  102  /* Network dropped connection because of reset */
+#define  ECONNABORTED  103  /* Software caused connection abort */
+#define  ECONNRESET  104  /* Connection reset by peer */
+#define  ENOBUFS    105  /* No buffer space available */
+#define  EISCONN    106  /* Transport endpoint is already connected */
+#define  ENOTCONN  107  /* Transport endpoint is not connected */
+#define  ESHUTDOWN  108  /* Cannot send after transport endpoint shutdown */
+#define  ETOOMANYREFS  109  /* Too many references: cannot splice */
+#define  ETIMEDOUT  110  /* Connection timed out */
+#define  ECONNREFUSED  111  /* Connection refused */
+#define  EHOSTDOWN  112  /* Host is down */
+#define  EHOSTUNREACH  113  /* No route to host */
+#define  EALREADY  114  /* Operation already in progress */
+#define  EINPROGRESS  115  /* Operation now in progress */
+#define  ESTALE    116  /* Stale NFS file handle */
+#define  EUCLEAN    117  /* Structure needs cleaning */
+#define  ENOTNAM    118  /* Not a XENIX named type file */
+#define  ENAVAIL    119  /* No XENIX semaphores available */
+#define  EISNAM    120  /* Is a named type file */
+#define  EREMOTEIO  121  /* Remote I/O error */
+#define  EDQUOT    122  /* Quota exceeded */
+
+#define  ENOMEDIUM  123  /* No medium found */
+#define  EMEDIUMTYPE  124  /* Wrong medium type */
+
+
+#define ENSROK    0 /* DNS server returned answer with no data */
+#define ENSRNODATA  160 /* DNS server returned answer with no data */
+#define ENSRFORMERR 161 /* DNS server claims query was misformatted */
+#define ENSRSERVFAIL 162  /* DNS server returned general failure */
+#define ENSRNOTFOUND 163  /* Domain name not found */
+#define ENSRNOTIMP  164 /* DNS server does not implement requested operation */
+#define ENSRREFUSED 165 /* DNS server refused query */
+#define ENSRBADQUERY 166  /* Misformatted DNS query */
+#define ENSRBADNAME 167 /* Misformatted domain name */
+#define ENSRBADFAMILY 168 /* Unsupported address family */
+#define ENSRBADRESP 169 /* Misformatted DNS reply */
+#define ENSRCONNREFUSED 170 /* Could not contact DNS servers */
+#define ENSRTIMEOUT 171 /* Timeout while contacting DNS servers */
+#define ENSROF    172 /* End of file */
+#define ENSRFILE  173 /* Error reading file */
+#define ENSRNOMEM 174 /* Out of memory */
+#define ENSRDESTRUCTION 175 /* Application terminated lookup */
+#define ENSRQUERYDOMAINTOOLONG  176 /* Domain name is too long */
+#define ENSRCNAMELOOP 177 /* Domain name is too long */
+
+#ifndef errno
+extern int errno;
+#endif
+
+#endif /* LWIP_PROVIDE_ERRNO */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_ARCH_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/debug.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/debug.h
new file mode 100644
index 000000000..d5c4e4747
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/debug.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_DEBUG_H__
+#define __LWIP_DEBUG_H__
+
+#include "lwip/arch.h"
+
+/** lower two bits indicate debug level
+ * - 0 off
+ * - 1 warning
+ * - 2 serious
+ * - 3 severe
+ */
+#define LWIP_DBG_LEVEL_OFF     0x00
+#define LWIP_DBG_LEVEL_WARNING 0x01 /* bad checksums, dropped packets, ... */
+#define LWIP_DBG_LEVEL_SERIOUS 0x02 /* memory allocation failures, ... */
+#define LWIP_DBG_LEVEL_SEVERE  0x03
+#define LWIP_DBG_MASK_LEVEL    0x03
+
+/** flag for LWIP_DEBUGF to enable that debug message */
+#define LWIP_DBG_ON            0x80U
+/** flag for LWIP_DEBUGF to disable that debug message */
+#define LWIP_DBG_OFF           0x00U
+
+/** flag for LWIP_DEBUGF indicating a tracing message (to follow program flow) */
+#define LWIP_DBG_TRACE         0x40U
+/** flag for LWIP_DEBUGF indicating a state debug message (to follow module states) */
+#define LWIP_DBG_STATE         0x20U
+/** flag for LWIP_DEBUGF indicating newly added code, not thoroughly tested yet */
+#define LWIP_DBG_FRESH         0x10U
+/** flag for LWIP_DEBUGF to halt after printing this debug message */
+#define LWIP_DBG_HALT          0x08U
+
+#ifndef LWIP_NOASSERT
+#define LWIP_ASSERT(message, assertion) do { if(!(assertion)) \
+  LWIP_PLATFORM_ASSERT(message); } while(0)
+#else  /* LWIP_NOASSERT */
+#define LWIP_ASSERT(message, assertion) 
+#endif /* LWIP_NOASSERT */
+
+/** if "expression" isn't true, then print "message" and execute "handler" expression */
+#ifndef LWIP_ERROR
+#define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \
+  LWIP_PLATFORM_ASSERT(message); handler;}} while(0)
+#endif /* LWIP_ERROR */
+
+#ifdef LWIP_DEBUG
+/** print debug message only if debug message type is enabled...
+ *  AND is of correct type AND is at least LWIP_DBG_LEVEL
+ */
+#define LWIP_DEBUGF(debug, message) do { \
+                               if ( \
+                                   ((debug) & LWIP_DBG_ON) && \
+                                   ((debug) & LWIP_DBG_TYPES_ON) && \
+                                   ((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >= LWIP_DBG_MIN_LEVEL)) { \
+                                 LWIP_PLATFORM_DIAG(message); \
+                                 if ((debug) & LWIP_DBG_HALT) { \
+                                   while(1); \
+                                 } \
+                               } \
+                             } while(0)
+
+#else  /* LWIP_DEBUG */
+#define LWIP_DEBUGF(debug, message) 
+#endif /* LWIP_DEBUG */
+
+#endif /* __LWIP_DEBUG_H__ */
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/def.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/def.h
new file mode 100644
index 000000000..d2ed251df
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/def.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_DEF_H__
+#define __LWIP_DEF_H__
+
+/* this might define NULL already */
+#include "lwip/arch.h"
+
+#define LWIP_MAX(x , y)  (((x) > (y)) ? (x) : (y))
+#define LWIP_MIN(x , y)  (((x) < (y)) ? (x) : (y))
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+
+
+#endif /* __LWIP_DEF_H__ */
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/dhcp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/dhcp.h
new file mode 100644
index 000000000..825dba6ec
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/dhcp.h
@@ -0,0 +1,246 @@
+/** @file
+ */
+
+#ifndef __LWIP_DHCP_H__
+#define __LWIP_DHCP_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_DHCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/netif.h"
+#include "lwip/udp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** period (in seconds) of the application calling dhcp_coarse_tmr() */
+#define DHCP_COARSE_TIMER_SECS 60 
+/** period (in milliseconds) of the application calling dhcp_coarse_tmr() */
+#define DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS * 1000UL)
+/** period (in milliseconds) of the application calling dhcp_fine_tmr() */
+#define DHCP_FINE_TIMER_MSECS 500 
+
+struct dhcp
+{
+  /** current DHCP state machine state */
+  u8_t state;
+  /** retries of current request */
+  u8_t tries;
+  /** transaction identifier of last sent request */ 
+  u32_t xid;
+  /** our connection to the DHCP server */ 
+  struct udp_pcb *pcb;
+  /** (first) pbuf of incoming msg */
+  struct pbuf *p;
+  /** incoming msg */
+  struct dhcp_msg *msg_in;
+  /** incoming msg options */
+  struct dhcp_msg *options_in; 
+  /** ingoing msg options length */
+  u16_t options_in_len;
+
+  struct pbuf *p_out; /* pbuf of outcoming msg */
+  struct dhcp_msg *msg_out; /* outgoing msg */
+  u16_t options_out_len; /* outgoing msg options length */
+  u16_t request_timeout; /* #ticks with period DHCP_FINE_TIMER_SECS for request timeout */
+  u16_t t1_timeout;  /* #ticks with period DHCP_COARSE_TIMER_SECS for renewal time */
+  u16_t t2_timeout;  /* #ticks with period DHCP_COARSE_TIMER_SECS for rebind time */
+  struct ip_addr server_ip_addr; /* dhcp server address that offered this lease */
+  struct ip_addr offered_ip_addr;
+  struct ip_addr offered_sn_mask;
+  struct ip_addr offered_gw_addr;
+  struct ip_addr offered_bc_addr;
+#define DHCP_MAX_DNS 2
+  u32_t dns_count; /* actual number of DNS servers obtained */
+  struct ip_addr offered_dns_addr[DHCP_MAX_DNS]; /* DNS server addresses */
+ 
+  u32_t offered_t0_lease; /* lease period (in seconds) */
+  u32_t offered_t1_renew; /* recommended renew time (usually 50% of lease period) */
+  u32_t offered_t2_rebind; /* recommended rebind time (usually 66% of lease period)  */
+#if LWIP_DHCP_AUTOIP_COOP
+  u8_t autoip_coop_state;
+#endif
+/** Patch #1308
+ *  TODO: See dhcp.c "TODO"s
+ */
+#if 0
+  struct ip_addr offered_si_addr;
+  u8_t *boot_file_name;
+#endif
+};
+
+/* MUST be compiled with "pack structs" or equivalent! */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** minimum set of fields of any DHCP message */
+struct dhcp_msg
+{
+  PACK_STRUCT_FIELD(u8_t op);
+  PACK_STRUCT_FIELD(u8_t htype);
+  PACK_STRUCT_FIELD(u8_t hlen);
+  PACK_STRUCT_FIELD(u8_t hops);
+  PACK_STRUCT_FIELD(u32_t xid);
+  PACK_STRUCT_FIELD(u16_t secs);
+  PACK_STRUCT_FIELD(u16_t flags);
+  PACK_STRUCT_FIELD(struct ip_addr ciaddr);
+  PACK_STRUCT_FIELD(struct ip_addr yiaddr);
+  PACK_STRUCT_FIELD(struct ip_addr siaddr);
+  PACK_STRUCT_FIELD(struct ip_addr giaddr);
+#define DHCP_CHADDR_LEN 16U
+  PACK_STRUCT_FIELD(u8_t chaddr[DHCP_CHADDR_LEN]);
+#define DHCP_SNAME_LEN 64U
+  PACK_STRUCT_FIELD(u8_t sname[DHCP_SNAME_LEN]);
+#define DHCP_FILE_LEN 128U
+  PACK_STRUCT_FIELD(u8_t file[DHCP_FILE_LEN]);
+  PACK_STRUCT_FIELD(u32_t cookie);
+#define DHCP_MIN_OPTIONS_LEN 68U
+/** make sure user does not configure this too small */
+#if ((defined(DHCP_OPTIONS_LEN)) && (DHCP_OPTIONS_LEN < DHCP_MIN_OPTIONS_LEN))
+#  undef DHCP_OPTIONS_LEN
+#endif
+/** allow this to be configured in lwipopts.h, but not too small */
+#if (!defined(DHCP_OPTIONS_LEN))
+/** set this to be sufficient for your options in outgoing DHCP msgs */
+#  define DHCP_OPTIONS_LEN DHCP_MIN_OPTIONS_LEN
+#endif
+  PACK_STRUCT_FIELD(u8_t options[DHCP_OPTIONS_LEN]);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+/** start DHCP configuration */
+err_t dhcp_start(struct netif *netif);
+/** enforce early lease renewal (not needed normally)*/
+err_t dhcp_renew(struct netif *netif);
+/** release the DHCP lease, usually called before dhcp_stop()*/
+err_t dhcp_release(struct netif *netif);
+/** stop DHCP configuration */
+void dhcp_stop(struct netif *netif);
+/** inform server of our manual IP address */
+void dhcp_inform(struct netif *netif);
+
+/** if enabled, check whether the offered IP address is not in use, using ARP */
+#if DHCP_DOES_ARP_CHECK
+void dhcp_arp_reply(struct netif *netif, struct ip_addr *addr);
+#endif
+
+/** to be called every minute */
+void dhcp_coarse_tmr(void);
+/** to be called every half second */
+void dhcp_fine_tmr(void);
+ 
+/** DHCP message item offsets and length */
+#define DHCP_MSG_OFS (UDP_DATA_OFS)  
+  #define DHCP_OP_OFS (DHCP_MSG_OFS + 0)
+  #define DHCP_HTYPE_OFS (DHCP_MSG_OFS + 1)
+  #define DHCP_HLEN_OFS (DHCP_MSG_OFS + 2)
+  #define DHCP_HOPS_OFS (DHCP_MSG_OFS + 3)
+  #define DHCP_XID_OFS (DHCP_MSG_OFS + 4)
+  #define DHCP_SECS_OFS (DHCP_MSG_OFS + 8)
+  #define DHCP_FLAGS_OFS (DHCP_MSG_OFS + 10)
+  #define DHCP_CIADDR_OFS (DHCP_MSG_OFS + 12)
+  #define DHCP_YIADDR_OFS (DHCP_MSG_OFS + 16)
+  #define DHCP_SIADDR_OFS (DHCP_MSG_OFS + 20)
+  #define DHCP_GIADDR_OFS (DHCP_MSG_OFS + 24)
+  #define DHCP_CHADDR_OFS (DHCP_MSG_OFS + 28)
+  #define DHCP_SNAME_OFS (DHCP_MSG_OFS + 44)
+  #define DHCP_FILE_OFS (DHCP_MSG_OFS + 108)
+#define DHCP_MSG_LEN 236
+
+#define DHCP_COOKIE_OFS (DHCP_MSG_OFS + DHCP_MSG_LEN)
+#define DHCP_OPTIONS_OFS (DHCP_MSG_OFS + DHCP_MSG_LEN + 4)
+
+#define DHCP_CLIENT_PORT 68  
+#define DHCP_SERVER_PORT 67
+
+/** DHCP client states */
+#define DHCP_REQUESTING 1
+#define DHCP_INIT 2
+#define DHCP_REBOOTING 3
+#define DHCP_REBINDING 4
+#define DHCP_RENEWING 5
+#define DHCP_SELECTING 6
+#define DHCP_INFORMING 7
+#define DHCP_CHECKING 8
+#define DHCP_PERMANENT 9
+#define DHCP_BOUND 10
+/** not yet implemented #define DHCP_RELEASING 11 */
+#define DHCP_BACKING_OFF 12
+#define DHCP_OFF 13
+
+/** AUTOIP cooperatation flags */
+#define DHCP_AUTOIP_COOP_STATE_OFF 0
+#define DHCP_AUTOIP_COOP_STATE_ON 1
+ 
+#define DHCP_BOOTREQUEST 1
+#define DHCP_BOOTREPLY 2
+
+#define DHCP_DISCOVER 1
+#define DHCP_OFFER 2
+#define DHCP_REQUEST 3
+#define DHCP_DECLINE 4
+#define DHCP_ACK 5
+#define DHCP_NAK 6
+#define DHCP_RELEASE 7
+#define DHCP_INFORM 8
+
+#define DHCP_HTYPE_ETH 1
+
+#define DHCP_HLEN_ETH 6
+
+#define DHCP_BROADCAST_FLAG 15
+#define DHCP_BROADCAST_MASK (1 << DHCP_FLAG_BROADCAST)
+
+/** BootP options */
+#define DHCP_OPTION_PAD 0
+#define DHCP_OPTION_SUBNET_MASK 1 /* RFC 2132 3.3 */
+#define DHCP_OPTION_ROUTER 3
+#define DHCP_OPTION_DNS_SERVER 6 
+#define DHCP_OPTION_HOSTNAME 12
+#define DHCP_OPTION_IP_TTL 23
+#define DHCP_OPTION_MTU 26
+#define DHCP_OPTION_BROADCAST 28
+#define DHCP_OPTION_TCP_TTL 37
+#define DHCP_OPTION_END 255
+
+/** DHCP options */
+#define DHCP_OPTION_REQUESTED_IP 50 /* RFC 2132 9.1, requested IP address */
+#define DHCP_OPTION_LEASE_TIME 51 /* RFC 2132 9.2, time in seconds, in 4 bytes */
+#define DHCP_OPTION_OVERLOAD 52 /* RFC2132 9.3, use file and/or sname field for options */
+
+#define DHCP_OPTION_MESSAGE_TYPE 53 /* RFC 2132 9.6, important for DHCP */
+#define DHCP_OPTION_MESSAGE_TYPE_LEN 1
+
+
+#define DHCP_OPTION_SERVER_ID 54 /* RFC 2132 9.7, server IP address */
+#define DHCP_OPTION_PARAMETER_REQUEST_LIST 55 /* RFC 2132 9.8, requested option types */
+
+#define DHCP_OPTION_MAX_MSG_SIZE 57 /* RFC 2132 9.10, message size accepted >= 576 */
+#define DHCP_OPTION_MAX_MSG_SIZE_LEN 2
+
+#define DHCP_OPTION_T1 58 /* T1 renewal time */
+#define DHCP_OPTION_T2 59 /* T2 rebinding time */
+#define DHCP_OPTION_US 60
+#define DHCP_OPTION_CLIENT_ID 61
+#define DHCP_OPTION_TFTP_SERVERNAME 66
+#define DHCP_OPTION_BOOTFILE 67
+
+/** possible combinations of overloading the file and sname fields with options */
+#define DHCP_OVERLOAD_NONE 0
+#define DHCP_OVERLOAD_FILE 1
+#define DHCP_OVERLOAD_SNAME  2
+#define DHCP_OVERLOAD_SNAME_FILE 3
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_DHCP */
+
+#endif /*__LWIP_DHCP_H__*/
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/dns.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/dns.h
new file mode 100644
index 000000000..e5f4b7a3d
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/dns.h
@@ -0,0 +1,97 @@
+/**
+ * lwip DNS resolver header file.
+
+ * Author: Jim Pettinato 
+ *   April 2007
+
+ * ported from uIP resolv.c Copyright (c) 2002-2003, Adam Dunkels.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LWIP_DNS_H__
+#define __LWIP_DNS_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_DNS /* don't build if not configured for use in lwipopts.h */
+
+/** DNS timer period */
+#define DNS_TMR_INTERVAL          1000
+
+/** DNS field TYPE used for "Resource Records" */
+#define DNS_RRTYPE_A              1     /* a host address */
+#define DNS_RRTYPE_NS             2     /* an authoritative name server */
+#define DNS_RRTYPE_MD             3     /* a mail destination (Obsolete - use MX) */
+#define DNS_RRTYPE_MF             4     /* a mail forwarder (Obsolete - use MX) */
+#define DNS_RRTYPE_CNAME          5     /* the canonical name for an alias */
+#define DNS_RRTYPE_SOA            6     /* marks the start of a zone of authority */
+#define DNS_RRTYPE_MB             7     /* a mailbox domain name (EXPERIMENTAL) */
+#define DNS_RRTYPE_MG             8     /* a mail group member (EXPERIMENTAL) */
+#define DNS_RRTYPE_MR             9     /* a mail rename domain name (EXPERIMENTAL) */
+#define DNS_RRTYPE_NULL           10    /* a null RR (EXPERIMENTAL) */
+#define DNS_RRTYPE_WKS            11    /* a well known service description */
+#define DNS_RRTYPE_PTR            12    /* a domain name pointer */
+#define DNS_RRTYPE_HINFO          13    /* host information */
+#define DNS_RRTYPE_MINFO          14    /* mailbox or mail list information */
+#define DNS_RRTYPE_MX             15    /* mail exchange */
+#define DNS_RRTYPE_TXT            16    /* text strings */
+
+/** DNS field CLASS used for "Resource Records" */
+#define DNS_RRCLASS_IN            1     /* the Internet */
+#define DNS_RRCLASS_CS            2     /* the CSNET class (Obsolete - used only for examples in some obsolete RFCs) */
+#define DNS_RRCLASS_CH            3     /* the CHAOS class */
+#define DNS_RRCLASS_HS            4     /* Hesiod [Dyer 87] */
+#define DNS_RRCLASS_FLUSH         0x800 /* Flush bit */
+
+/** Callback which is invoked when a hostname is found.
+ * A function of this type must be implemented by the application using the DNS resolver.
+ * @param name pointer to the name that was looked up.
+ * @param ipaddr pointer to a struct ip_addr containing the IP address of the hostname,
+ *        or NULL if the name could not be found (or on any other error).
+ * @param callback_arg a user-specified callback argument passed to dns_gethostbyname
+*/
+typedef void (*dns_found_callback)(const char *name, struct ip_addr *ipaddr, void *callback_arg);
+
+
+void           dns_init(void);
+
+void           dns_tmr(void);
+
+void           dns_setserver(u8_t numdns, struct ip_addr *dnsserver);
+
+struct ip_addr dns_getserver(u8_t numdns);
+
+err_t          dns_gethostbyname(const char *hostname, struct ip_addr *addr,
+                                 dns_found_callback found, void *callback_arg);
+
+#if DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+int            dns_local_removehost(const char *hostname, const struct ip_addr *addr);
+err_t          dns_local_addhost(const char *hostname, const struct ip_addr *addr);
+#endif /* DNS_LOCAL_HOSTLIST && DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+
+#endif /* LWIP_DNS */
+
+#endif /* __LWIP_DNS_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/err.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/err.h
new file mode 100644
index 000000000..696764454
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/err.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_ERR_H__
+#define __LWIP_ERR_H__
+
+#include "lwip/opt.h"
+#include "lwip/arch.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Define LWIP_ERR_T in cc.h if you want to use
+ *  a different type for your platform (must be signed). */
+#ifdef LWIP_ERR_T
+typedef LWIP_ERR_T err_t;
+#else /* LWIP_ERR_T */
+ typedef s8_t err_t;
+#endif /* LWIP_ERR_T*/
+
+/* Definitions for error constants. */
+
+#define ERR_OK          0    /* No error, everything OK. */
+#define ERR_MEM        -1    /* Out of memory error.     */
+#define ERR_BUF        -2    /* Buffer error.            */
+#define ERR_TIMEOUT    -3    /* Timeout.                 */
+#define ERR_RTE        -4    /* Routing problem.         */
+
+#define ERR_IS_FATAL(e) ((e) < ERR_RTE)
+
+#define ERR_ABRT       -5    /* Connection aborted.      */
+#define ERR_RST        -6    /* Connection reset.        */
+#define ERR_CLSD       -7    /* Connection closed.       */
+#define ERR_CONN       -8    /* Not connected.           */
+
+#define ERR_VAL        -9    /* Illegal value.           */
+
+#define ERR_ARG        -10   /* Illegal argument.        */
+
+#define ERR_USE        -11   /* Address in use.          */
+
+#define ERR_IF         -12   /* Low-level netif error    */
+#define ERR_ISCONN     -13   /* Already connected.       */
+
+#define ERR_INPROGRESS -14   /* Operation in progress    */
+
+
+#ifdef LWIP_DEBUG
+extern const char *lwip_strerr(err_t err);
+#else
+#define lwip_strerr(x) ""
+#endif /* LWIP_DEBUG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_ERR_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/init.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/init.h
new file mode 100644
index 000000000..a4dc0577f
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/init.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_INIT_H__
+#define __LWIP_INIT_H__
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** X.x.x: Major version of the stack */
+#define LWIP_VERSION_MAJOR      1U
+/** x.X.x: Minor version of the stack */
+#define LWIP_VERSION_MINOR      3U
+/** x.x.X: Revision of the stack */
+#define LWIP_VERSION_REVISION   1U
+/** For release candidates, this is set to 1..254
+  * For official releases, this is set to 255 (LWIP_RC_RELEASE)
+  * For development versions (CVS), this is set to 0 (LWIP_RC_DEVELOPMENT) */
+#define LWIP_VERSION_RC         255U
+
+/** LWIP_VERSION_RC is set to LWIP_RC_RELEASE for official releases */
+#define LWIP_RC_RELEASE         255U
+/** LWIP_VERSION_RC is set to LWIP_RC_DEVELOPMENT for CVS versions */
+#define LWIP_RC_DEVELOPMENT     0U
+
+#define LWIP_VERSION_IS_RELEASE     (LWIP_VERSION_RC == LWIP_RC_RELEASE)
+#define LWIP_VERSION_IS_DEVELOPMENT (LWIP_VERSION_RC == LWIP_RC_DEVELOPMENT)
+#define LWIP_VERSION_IS_RC          ((LWIP_VERSION_RC != LWIP_RC_RELEASE) && (LWIP_VERSION_RC != LWIP_RC_DEVELOPMENT))
+
+/** Provides the version of the stack */
+#define LWIP_VERSION   (LWIP_VERSION_MAJOR << 24   | LWIP_VERSION_MINOR << 16 | \
+                        LWIP_VERSION_REVISION << 8 | LWIP_VERSION_RC)
+
+/* Modules initialization */
+void lwip_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_INIT_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/mem.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/mem.h
new file mode 100644
index 000000000..327c2049f
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/mem.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_MEM_H__
+#define __LWIP_MEM_H__
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if MEM_LIBC_MALLOC
+
+#include <stddef.h> /* for size_t */
+
+typedef size_t mem_size_t;
+
+/* aliases for C library malloc() */
+#define mem_init()
+/* in case C library malloc() needs extra protection,
+ * allow these defines to be overridden.
+ */
+#ifndef mem_free
+#define mem_free free
+#endif
+#ifndef mem_malloc
+#define mem_malloc malloc
+#endif
+#ifndef mem_calloc
+#define mem_calloc calloc
+#endif
+#ifndef mem_realloc
+static void *mem_realloc(void *mem, mem_size_t size)
+{
+  LWIP_UNUSED_ARG(size);
+  return mem;
+}
+#endif
+#else /* MEM_LIBC_MALLOC */
+
+/* MEM_SIZE would have to be aligned, but using 64000 here instead of
+ * 65535 leaves some room for alignment...
+ */
+#if MEM_SIZE > 64000l
+typedef u32_t mem_size_t;
+#else
+typedef u16_t mem_size_t;
+#endif /* MEM_SIZE > 64000 */
+
+#if MEM_USE_POOLS
+/** mem_init is not used when using pools instead of a heap */
+#define mem_init()
+/** mem_realloc is not used when using pools instead of a heap:
+    we can't free part of a pool element and don't want to copy the rest */
+#define mem_realloc(mem, size) (mem)
+#else /* MEM_USE_POOLS */
+/* lwIP alternative malloc */
+void  mem_init(void);
+void *mem_realloc(void *mem, mem_size_t size);
+#endif /* MEM_USE_POOLS */
+void *mem_malloc(mem_size_t size);
+void *mem_calloc(mem_size_t count, mem_size_t size);
+void  mem_free(void *mem);
+#endif /* MEM_LIBC_MALLOC */
+
+#ifndef LWIP_MEM_ALIGN_SIZE
+#define LWIP_MEM_ALIGN_SIZE(size) (((size) + MEM_ALIGNMENT - 1) & ~(MEM_ALIGNMENT-1))
+#endif
+
+#ifndef LWIP_MEM_ALIGN
+#define LWIP_MEM_ALIGN(addr) ((void *)(((mem_ptr_t)(addr) + MEM_ALIGNMENT - 1) & ~(mem_ptr_t)(MEM_ALIGNMENT-1)))
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_MEM_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/memp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/memp.h
new file mode 100644
index 000000000..f0d073994
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/memp.h
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef __LWIP_MEMP_H__
+#define __LWIP_MEMP_H__
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Create the list of all memory pools managed by memp. MEMP_MAX represents a NULL pool at the end */
+typedef enum {
+#define LWIP_MEMPOOL(name,num,size,desc)  MEMP_##name,
+#include "lwip/memp_std.h"
+  MEMP_MAX
+} memp_t;
+
+#if MEM_USE_POOLS
+/* Use a helper type to get the start and end of the user "memory pools" for mem_malloc */
+typedef enum {
+    /* Get the first (via:
+       MEMP_POOL_HELPER_START = ((u8_t) 1*MEMP_POOL_A + 0*MEMP_POOL_B + 0*MEMP_POOL_C + 0)*/
+    MEMP_POOL_HELPER_FIRST = ((u8_t)
+#define LWIP_MEMPOOL(name,num,size,desc)
+#define LWIP_MALLOC_MEMPOOL_START 1
+#define LWIP_MALLOC_MEMPOOL(num, size) * MEMP_POOL_##size + 0
+#define LWIP_MALLOC_MEMPOOL_END
+#include "lwip/memp_std.h"
+    ) ,
+    /* Get the last (via:
+       MEMP_POOL_HELPER_END = ((u8_t) 0 + MEMP_POOL_A*0 + MEMP_POOL_B*0 + MEMP_POOL_C*1) */
+    MEMP_POOL_HELPER_LAST = ((u8_t)
+#define LWIP_MEMPOOL(name,num,size,desc)
+#define LWIP_MALLOC_MEMPOOL_START
+#define LWIP_MALLOC_MEMPOOL(num, size) 0 + MEMP_POOL_##size *
+#define LWIP_MALLOC_MEMPOOL_END 1
+#include "lwip/memp_std.h"
+    )
+} memp_pool_helper_t;
+
+/* The actual start and stop values are here (cast them over)
+   We use this helper type and these defines so we can avoid using const memp_t values */
+#define MEMP_POOL_FIRST ((memp_t) MEMP_POOL_HELPER_FIRST)
+#define MEMP_POOL_LAST   ((memp_t) MEMP_POOL_HELPER_LAST)
+#endif /* MEM_USE_POOLS */
+
+#if MEMP_MEM_MALLOC || MEM_USE_POOLS
+extern const u16_t memp_sizes[MEMP_MAX];
+#endif /* MEMP_MEM_MALLOC || MEM_USE_POOLS */
+
+#if MEMP_MEM_MALLOC
+
+#include "mem.h"
+
+#define memp_init()
+#define memp_malloc(type)     mem_malloc(memp_sizes[type])
+#define memp_free(type, mem)  mem_free(mem)
+
+#else /* MEMP_MEM_MALLOC */
+
+#if MEM_USE_POOLS
+/** This structure is used to save the pool one element came from. */
+struct memp_malloc_helper
+{
+   memp_t poolnr;
+};
+#endif /* MEM_USE_POOLS */
+
+void  memp_init(void);
+
+#if MEMP_OVERFLOW_CHECK
+void *memp_malloc_fn(memp_t type, const char* file, const int line);
+#define memp_malloc(t) memp_malloc_fn((t), __FILE__, __LINE__)
+#else
+void *memp_malloc(memp_t type);
+#endif
+void  memp_free(memp_t type, void *mem);
+
+#endif /* MEMP_MEM_MALLOC */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_MEMP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/memp_std.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/memp_std.h
new file mode 100644
index 000000000..344690328
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/memp_std.h
@@ -0,0 +1,102 @@
+/*
+ * SETUP: Make sure we define everything we will need.
+ *
+ * We have create three types of pools:
+ *   1) MEMPOOL - standard pools
+ *   2) MALLOC_MEMPOOL - to be used by mem_malloc in mem.c
+ *   3) PBUF_MEMPOOL - a mempool of pbuf's, so include space for the pbuf struct
+ *
+ * If the include'r doesn't require any special treatment of each of the types
+ * above, then will declare #2 & #3 to be just standard mempools.
+ */
+#ifndef LWIP_MALLOC_MEMPOOL
+/* This treats "malloc pools" just like any other pool.
+   The pools are a little bigger to provide 'size' as the amount of user data. */
+#define LWIP_MALLOC_MEMPOOL(num, size) LWIP_MEMPOOL(POOL_##size, num, (size + sizeof(struct memp_malloc_helper)), "MALLOC_"#size)
+#define LWIP_MALLOC_MEMPOOL_START
+#define LWIP_MALLOC_MEMPOOL_END
+#endif /* LWIP_MALLOC_MEMPOOL */ 
+
+#ifndef LWIP_PBUF_MEMPOOL
+/* This treats "pbuf pools" just like any other pool.
+ * Allocates buffers for a pbuf struct AND a payload size */
+#define LWIP_PBUF_MEMPOOL(name, num, payload, desc) LWIP_MEMPOOL(name, num, (MEMP_ALIGN_SIZE(sizeof(struct pbuf)) + MEMP_ALIGN_SIZE(payload)), desc)
+#endif /* LWIP_PBUF_MEMPOOL */
+
+
+/*
+ * A list of internal pools used by LWIP.
+ *
+ * LWIP_MEMPOOL(pool_name, number_elements, element_size, pool_description)
+ *     creates a pool name MEMP_pool_name. description is used in stats.c
+ */
+#if LWIP_RAW
+LWIP_MEMPOOL(RAW_PCB,        MEMP_NUM_RAW_PCB,         sizeof(struct raw_pcb),        "RAW_PCB")
+#endif /* LWIP_RAW */
+
+#if LWIP_UDP
+LWIP_MEMPOOL(UDP_PCB,        MEMP_NUM_UDP_PCB,         sizeof(struct udp_pcb),        "UDP_PCB")
+#endif /* LWIP_UDP */
+
+#if LWIP_TCP
+LWIP_MEMPOOL(TCP_PCB,        MEMP_NUM_TCP_PCB,         sizeof(struct tcp_pcb),        "TCP_PCB")
+LWIP_MEMPOOL(TCP_PCB_LISTEN, MEMP_NUM_TCP_PCB_LISTEN,  sizeof(struct tcp_pcb_listen), "TCP_PCB_LISTEN")
+LWIP_MEMPOOL(TCP_SEG,        MEMP_NUM_TCP_SEG,         sizeof(struct tcp_seg),        "TCP_SEG")
+#endif /* LWIP_TCP */
+
+#if IP_REASSEMBLY
+LWIP_MEMPOOL(REASSDATA,      MEMP_NUM_REASSDATA,       sizeof(struct ip_reassdata),   "REASSDATA")
+#endif /* IP_REASSEMBLY */
+
+#if LWIP_NETCONN
+LWIP_MEMPOOL(NETBUF,         MEMP_NUM_NETBUF,          sizeof(struct netbuf),         "NETBUF")
+LWIP_MEMPOOL(NETCONN,        MEMP_NUM_NETCONN,         sizeof(struct netconn),        "NETCONN")
+#endif /* LWIP_NETCONN */
+
+#if NO_SYS==0
+LWIP_MEMPOOL(TCPIP_MSG_API,  MEMP_NUM_TCPIP_MSG_API,   sizeof(struct tcpip_msg),      "TCPIP_MSG_API")
+LWIP_MEMPOOL(TCPIP_MSG_INPKT,MEMP_NUM_TCPIP_MSG_INPKT, sizeof(struct tcpip_msg),      "TCPIP_MSG_INPKT")
+#endif /* NO_SYS==0 */
+
+#if ARP_QUEUEING
+LWIP_MEMPOOL(ARP_QUEUE,      MEMP_NUM_ARP_QUEUE,       sizeof(struct etharp_q_entry), "ARP_QUEUE")
+#endif /* ARP_QUEUEING */
+
+#if LWIP_IGMP
+LWIP_MEMPOOL(IGMP_GROUP,     MEMP_NUM_IGMP_GROUP,      sizeof(struct igmp_group),     "IGMP_GROUP")
+#endif /* LWIP_IGMP */
+
+#if NO_SYS==0
+LWIP_MEMPOOL(SYS_TIMEOUT,    MEMP_NUM_SYS_TIMEOUT,     sizeof(struct sys_timeo),      "SYS_TIMEOUT")
+#endif /* NO_SYS==0 */
+
+
+/*
+ * A list of pools of pbuf's used by LWIP.
+ *
+ * LWIP_PBUF_MEMPOOL(pool_name, number_elements, pbuf_payload_size, pool_description)
+ *     creates a pool name MEMP_pool_name. description is used in stats.c
+ *     This allocates enough space for the pbuf struct and a payload.
+ *     (Example: pbuf_payload_size=0 allocates only size for the struct)
+ */
+LWIP_PBUF_MEMPOOL(PBUF,      MEMP_NUM_PBUF,            0,                             "PBUF_REF/ROM")
+LWIP_PBUF_MEMPOOL(PBUF_POOL, PBUF_POOL_SIZE,           PBUF_POOL_BUFSIZE,             "PBUF_POOL")
+
+
+/*
+ * Allow for user-defined pools; this must be explicitly set in lwipopts.h
+ * since the default is to NOT look for lwippools.h
+ */
+#if MEMP_USE_CUSTOM_POOLS
+#include "lwippools.h"
+#endif /* MEMP_USE_CUSTOM_POOLS */
+
+/*
+ * REQUIRED CLEANUP: Clear up so we don't get "multiply defined" error later
+ * (#undef is ignored for something that is not defined)
+ */
+#undef LWIP_MEMPOOL
+#undef LWIP_MALLOC_MEMPOOL
+#undef LWIP_MALLOC_MEMPOOL_START
+#undef LWIP_MALLOC_MEMPOOL_END
+#undef LWIP_PBUF_MEMPOOL
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netbuf.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netbuf.h
new file mode 100644
index 000000000..6d84dd073
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netbuf.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_NETBUF_H__
+#define __LWIP_NETBUF_H__
+
+#include "lwip/opt.h"
+#include "lwip/pbuf.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct netbuf {
+  struct pbuf *p, *ptr;
+  struct ip_addr *addr;
+  u16_t port;
+};
+
+/* Network buffer functions: */
+struct netbuf *   netbuf_new      (void);
+void              netbuf_delete   (struct netbuf *buf);
+void *            netbuf_alloc    (struct netbuf *buf, u16_t size);
+void              netbuf_free     (struct netbuf *buf);
+err_t             netbuf_ref      (struct netbuf *buf,
+           const void *dataptr, u16_t size);
+void              netbuf_chain    (struct netbuf *head,
+           struct netbuf *tail);
+
+u16_t             netbuf_len      (struct netbuf *buf);
+err_t             netbuf_data     (struct netbuf *buf,
+           void **dataptr, u16_t *len);
+s8_t              netbuf_next     (struct netbuf *buf);
+void              netbuf_first    (struct netbuf *buf);
+
+
+#define netbuf_copy_partial(buf, dataptr, len, offset) \
+  pbuf_copy_partial((buf)->p, (dataptr), (len), (offset))
+#define netbuf_copy(buf,dataptr,len) netbuf_copy_partial(buf, dataptr, len, 0)
+#define netbuf_take(buf, dataptr, len) pbuf_take((buf)->p, dataptr, len)
+#define netbuf_len(buf)              ((buf)->p->tot_len)
+#define netbuf_fromaddr(buf)         ((buf)->addr)
+#define netbuf_fromport(buf)         ((buf)->port)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_NETBUF_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netdb.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netdb.h
new file mode 100644
index 000000000..0f7b2ec04
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netdb.h
@@ -0,0 +1,111 @@
+/*
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Simon Goldschmidt
+ *
+ */
+
+#include "lwip/opt.h"
+
+#if LWIP_DNS && LWIP_SOCKET
+
+#include <stddef.h> /* for size_t */
+
+#include "lwip/sockets.h"
+
+/* some rarely used options */
+#ifndef LWIP_DNS_API_DECLARE_H_ERRNO
+#define LWIP_DNS_API_DECLARE_H_ERRNO 1
+#endif
+
+#ifndef LWIP_DNS_API_DEFINE_ERRORS
+#define LWIP_DNS_API_DEFINE_ERRORS 1
+#endif
+
+#ifndef LWIP_DNS_API_DECLARE_STRUCTS
+#define LWIP_DNS_API_DECLARE_STRUCTS 1
+#endif
+
+#if LWIP_DNS_API_DEFINE_ERRORS
+/** Errors used by the DNS API functions, h_errno can be one of them */
+#define EAI_NONAME      200
+#define EAI_SERVICE     201
+#define EAI_FAIL        202
+#define EAI_MEMORY      203
+
+#define HOST_NOT_FOUND  210
+#define NO_DATA         211
+#define NO_RECOVERY     212
+#define TRY_AGAIN       213
+#endif /* LWIP_DNS_API_DEFINE_ERRORS */
+
+#if LWIP_DNS_API_DECLARE_STRUCTS
+struct hostent {
+    char  *h_name;      /* Official name of the host. */
+    char **h_aliases;   /* A pointer to an array of pointers to alternative host names,
+                           terminated by a null pointer. */
+    int    h_addrtype;  /* Address type. */
+    int    h_length;    /* The length, in bytes, of the address. */
+    char **h_addr_list; /* A pointer to an array of pointers to network addresses (in
+                           network byte order) for the host, terminated by a null pointer. */
+#define h_addr h_addr_list[0] /* for backward compatibility */
+};
+
+struct addrinfo {
+    int               ai_flags;      /* Input flags. */
+    int               ai_family;     /* Address family of socket. */
+    int               ai_socktype;   /* Socket type. */
+    int               ai_protocol;   /* Protocol of socket. */
+    socklen_t         ai_addrlen;    /* Length of socket address. */
+    struct sockaddr  *ai_addr;       /* Socket address of socket. */
+    char             *ai_canonname;  /* Canonical name of service location. */
+    struct addrinfo  *ai_next;       /* Pointer to next in list. */
+};
+#endif /* LWIP_DNS_API_DECLARE_STRUCTS */
+
+#if LWIP_DNS_API_DECLARE_H_ERRNO
+/* application accessable error code set by the DNS API functions */
+extern int h_errno;
+#endif /* LWIP_DNS_API_DECLARE_H_ERRNO*/
+
+struct hostent *lwip_gethostbyname(const char *name);
+int lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf,
+                size_t buflen, struct hostent **result, int *h_errnop);
+void lwip_freeaddrinfo(struct addrinfo *ai);
+int lwip_getaddrinfo(const char *nodename,
+       const char *servname,
+       const struct addrinfo *hints,
+       struct addrinfo **res);
+
+#if LWIP_COMPAT_SOCKETS
+#define gethostbyname(name) lwip_gethostbyname(name)
+#define gethostbyname_r(name, ret, buf, buflen, result, h_errnop) \
+       lwip_gethostbyname_r(name, ret, buf, buflen, result, h_errnop)
+#define freeaddrinfo(addrinfo) lwip_freeaddrinfo(a)
+#define getaddrinfo(nodname, servname, hints, res) \
+       lwip_getaddrinfo(nodname, servname, hints, res)
+#endif /* LWIP_COMPAT_SOCKETS */
+
+#endif /* LWIP_DNS && LWIP_SOCKET */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netif.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netif.h
new file mode 100644
index 000000000..a32503052
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netif.h
@@ -0,0 +1,263 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_NETIF_H__
+#define __LWIP_NETIF_H__
+
+#include "lwip/opt.h"
+
+#define ENABLE_LOOPBACK (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF)
+
+#include "lwip/err.h"
+
+#include "lwip/ip_addr.h"
+
+#include "lwip/inet.h"
+#include "lwip/pbuf.h"
+#if LWIP_DHCP
+struct dhcp;
+#endif
+#if LWIP_AUTOIP
+struct autoip;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Throughout this file, IP addresses are expected to be in
+ * the same byte order as in IP_PCB. */
+
+/** must be the maximum of all used hardware address lengths
+    across all types of interfaces in use */
+#define NETIF_MAX_HWADDR_LEN 6U
+
+/** TODO: define the use (where, when, whom) of netif flags */
+
+/** whether the network interface is 'up'. this is
+ * a software flag used to control whether this network
+ * interface is enabled and processes traffic.
+ */
+#define NETIF_FLAG_UP           0x01U
+/** if set, the netif has broadcast capability */
+#define NETIF_FLAG_BROADCAST    0x02U
+/** if set, the netif is one end of a point-to-point connection */
+#define NETIF_FLAG_POINTTOPOINT 0x04U
+/** if set, the interface is configured using DHCP */
+#define NETIF_FLAG_DHCP         0x08U
+/** if set, the interface has an active link
+ *  (set by the network interface driver) */
+#define NETIF_FLAG_LINK_UP      0x10U
+/** if set, the netif is an device using ARP */
+#define NETIF_FLAG_ETHARP       0x20U
+/** if set, the netif has IGMP capability */
+#define NETIF_FLAG_IGMP         0x40U
+
+/** Generic data structure used for all lwIP network interfaces.
+ *  The following fields should be filled in by the initialization
+ *  function for the device driver: hwaddr_len, hwaddr[], mtu, flags */
+
+struct netif {
+  /** pointer to next in linked list */
+  struct netif *next;
+
+  /** IP address configuration in network byte order */
+  struct ip_addr ip_addr;
+  struct ip_addr netmask;
+  struct ip_addr gw;
+
+  /** This function is called by the network device driver
+   *  to pass a packet up the TCP/IP stack. */
+  err_t (* input)(struct pbuf *p, struct netif *inp);
+  /** This function is called by the IP module when it wants
+   *  to send a packet on the interface. This function typically
+   *  first resolves the hardware address, then sends the packet. */
+  err_t (* output)(struct netif *netif, struct pbuf *p,
+       struct ip_addr *ipaddr);
+  /** This function is called by the ARP module when it wants
+   *  to send a packet on the interface. This function outputs
+   *  the pbuf as-is on the link medium. */
+  err_t (* linkoutput)(struct netif *netif, struct pbuf *p);
+#if LWIP_NETIF_STATUS_CALLBACK
+  /** This function is called when the netif state is set to up or down
+   */
+  void (* status_callback)(struct netif *netif);
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+#if LWIP_NETIF_LINK_CALLBACK
+  /** This function is called when the netif link is set to up or down
+   */
+  void (* link_callback)(struct netif *netif);
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+  /** This field can be set by the device driver and could point
+   *  to state information for the device. */
+  void *state;
+#if LWIP_DHCP
+  /** the DHCP client state information for this netif */
+  struct dhcp *dhcp;
+#endif /* LWIP_DHCP */
+#if LWIP_AUTOIP
+  /** the AutoIP client state information for this netif */
+  struct autoip *autoip;
+#endif
+#if LWIP_NETIF_HOSTNAME
+  /* the hostname for this netif, NULL is a valid value */
+  char*  hostname;
+#endif /* LWIP_NETIF_HOSTNAME */
+  /** number of bytes used in hwaddr */
+  u8_t hwaddr_len;
+  /** link level hardware address of this interface */
+  u8_t hwaddr[NETIF_MAX_HWADDR_LEN];
+  /** maximum transfer unit (in bytes) */
+  u16_t mtu;
+  /** flags (see NETIF_FLAG_ above) */
+  u8_t flags;
+  /** descriptive abbreviation */
+  char name[2];
+  /** number of this interface */
+  u8_t num;
+#if LWIP_SNMP
+  /** link type (from "snmp_ifType" enum from snmp.h) */
+  u8_t link_type;
+  /** (estimate) link speed */
+  u32_t link_speed;
+  /** timestamp at last change made (up/down) */
+  u32_t ts;
+  /** counters */
+  u32_t ifinoctets;
+  u32_t ifinucastpkts;
+  u32_t ifinnucastpkts;
+  u32_t ifindiscards;
+  u32_t ifoutoctets;
+  u32_t ifoutucastpkts;
+  u32_t ifoutnucastpkts;
+  u32_t ifoutdiscards;
+#endif /* LWIP_SNMP */
+#if LWIP_IGMP
+  /* This function could be called to add or delete a entry in the multicast filter table of the ethernet MAC.*/
+  err_t (*igmp_mac_filter)( struct netif *netif, struct ip_addr *group, u8_t action);
+#endif /* LWIP_IGMP */
+#if LWIP_NETIF_HWADDRHINT
+  u8_t *addr_hint;
+#endif /* LWIP_NETIF_HWADDRHINT */
+#if ENABLE_LOOPBACK
+  /* List of packets to be queued for ourselves. */
+  struct pbuf *loop_first;
+  struct pbuf *loop_last;
+#if LWIP_LOOPBACK_MAX_PBUFS
+  u16_t loop_cnt_current;
+#endif /* LWIP_LOOPBACK_MAX_PBUFS */
+#endif /* ENABLE_LOOPBACK */
+};
+
+#if LWIP_SNMP
+#define NETIF_INIT_SNMP(netif, type, speed) \
+  /* use "snmp_ifType" enum from snmp.h for "type", snmp_ifType_ethernet_csmacd by example */ \
+  netif->link_type = type;    \
+  /* your link speed here (units: bits per second) */  \
+  netif->link_speed = speed;  \
+  netif->ts = 0;              \
+  netif->ifinoctets = 0;      \
+  netif->ifinucastpkts = 0;   \
+  netif->ifinnucastpkts = 0;  \
+  netif->ifindiscards = 0;    \
+  netif->ifoutoctets = 0;     \
+  netif->ifoutucastpkts = 0;  \
+  netif->ifoutnucastpkts = 0; \
+  netif->ifoutdiscards = 0
+#else /* LWIP_SNMP */
+#define NETIF_INIT_SNMP(netif, type, speed)
+#endif /* LWIP_SNMP */
+
+
+/** The list of network interfaces. */
+extern struct netif *netif_list;
+/** The default network interface. */
+extern struct netif *netif_default;
+
+#define netif_init() /* Compatibility define, not init needed. */
+
+struct netif *netif_add(struct netif *netif, struct ip_addr *ipaddr, struct ip_addr *netmask,
+      struct ip_addr *gw,
+      void *state,
+      err_t (* init)(struct netif *netif),
+      err_t (* input)(struct pbuf *p, struct netif *netif));
+
+void
+netif_set_addr(struct netif *netif,struct ip_addr *ipaddr, struct ip_addr *netmask,
+    struct ip_addr *gw);
+void netif_remove(struct netif * netif);
+
+/* Returns a network interface given its name. The name is of the form
+   "et0", where the first two letters are the "name" field in the
+   netif structure, and the digit is in the num field in the same
+   structure. */
+struct netif *netif_find(char *name);
+
+void netif_set_default(struct netif *netif);
+
+void netif_set_ipaddr(struct netif *netif, struct ip_addr *ipaddr);
+void netif_set_netmask(struct netif *netif, struct ip_addr *netmask);
+void netif_set_gw(struct netif *netif, struct ip_addr *gw);
+
+void netif_set_up(struct netif *netif);
+void netif_set_down(struct netif *netif);
+u8_t netif_is_up(struct netif *netif);
+
+#if LWIP_NETIF_STATUS_CALLBACK
+/*
+ * Set callback to be called when interface is brought up/down
+ */
+void netif_set_status_callback(struct netif *netif, void (* status_callback)(struct netif *netif));
+#endif /* LWIP_NETIF_STATUS_CALLBACK */
+
+#if LWIP_NETIF_LINK_CALLBACK
+void netif_set_link_up(struct netif *netif);
+void netif_set_link_down(struct netif *netif);
+u8_t netif_is_link_up(struct netif *netif);
+/*
+ * Set callback to be called when link is brought up/down
+ */
+void netif_set_link_callback(struct netif *netif, void (* link_callback)(struct netif *netif));
+#endif /* LWIP_NETIF_LINK_CALLBACK */
+
+#ifdef __cplusplus
+}
+#endif
+
+#if ENABLE_LOOPBACK
+err_t netif_loop_output(struct netif *netif, struct pbuf *p, struct ip_addr *dest_ip);
+void netif_poll(struct netif *netif);
+#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
+void netif_poll_all(void);
+#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
+#endif /* ENABLE_LOOPBACK */
+
+#endif /* __LWIP_NETIF_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netifapi.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netifapi.h
new file mode 100644
index 000000000..36c6bd0a2
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/netifapi.h
@@ -0,0 +1,100 @@
+/*
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ */
+ 
+#ifndef __LWIP_NETIFAPI_H__
+#define __LWIP_NETIFAPI_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sys.h"
+#include "lwip/netif.h"
+#include "lwip/dhcp.h"
+#include "lwip/autoip.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct netifapi_msg_msg {
+#if !LWIP_TCPIP_CORE_LOCKING
+  sys_sem_t sem;
+#endif /* !LWIP_TCPIP_CORE_LOCKING */
+  err_t err;
+  struct netif *netif;
+  union {
+    struct {
+      struct ip_addr *ipaddr;
+      struct ip_addr *netmask;
+      struct ip_addr *gw;
+      void *state;
+      err_t (* init) (struct netif *netif);
+      err_t (* input)(struct pbuf *p, struct netif *netif);
+    } add;
+    struct {
+      void  (* voidfunc)(struct netif *netif);
+      err_t (* errtfunc)(struct netif *netif);
+    } common;
+  } msg;
+};
+
+struct netifapi_msg {
+  void (* function)(struct netifapi_msg_msg *msg);
+  struct netifapi_msg_msg msg;
+};
+
+
+/* API for application */
+err_t netifapi_netif_add       ( struct netif *netif,
+                                 struct ip_addr *ipaddr,
+                                 struct ip_addr *netmask,
+                                 struct ip_addr *gw,
+                                 void *state,
+                                 err_t (* init)(struct netif *netif),
+                                 err_t (* input)(struct pbuf *p, struct netif *netif) );
+
+err_t netifapi_netif_common    ( struct netif *netif,
+                                 void  (* voidfunc)(struct netif *netif),
+                                 err_t (* errtfunc)(struct netif *netif) );
+
+#define netifapi_netif_remove(n)      netifapi_netif_common(n, netif_remove, NULL)
+#define netifapi_netif_set_up(n)      netifapi_netif_common(n, netif_set_up, NULL)
+#define netifapi_netif_set_down(n)    netifapi_netif_common(n, netif_set_down, NULL)
+#define netifapi_netif_set_default(n) netifapi_netif_common(n, netif_set_default, NULL)
+#define netifapi_dhcp_start(n)        netifapi_netif_common(n, NULL, dhcp_start)
+#define netifapi_dhcp_stop(n)         netifapi_netif_common(n, dhcp_stop, NULL)
+#define netifapi_autoip_start(n)      netifapi_netif_common(n, NULL, autoip_start)
+#define netifapi_autoip_stop(n)       netifapi_netif_common(n, NULL, autoip_stop)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_NETIF_API */
+
+#endif /* __LWIP_NETIFAPI_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/opt.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/opt.h
new file mode 100644
index 000000000..e8bd8b89e
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/opt.h
@@ -0,0 +1,1820 @@
+/**
+ * @file
+ *
+ * lwIP Options Configuration
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_OPT_H__
+#define __LWIP_OPT_H__
+
+/*
+ * Include user defined options first. Anything not defined in these files
+ * will be set to standard values. Override anything you dont like!
+ */
+#include "lwipopts.h"
+#include "lwip/debug.h"
+
+/*
+   -----------------------------------------------
+   ---------- Platform specific locking ----------
+   -----------------------------------------------
+*/
+
+/**
+ * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain
+ * critical regions during buffer allocation, deallocation and memory
+ * allocation and deallocation.
+ */
+#ifndef SYS_LIGHTWEIGHT_PROT
+#define SYS_LIGHTWEIGHT_PROT            0
+#endif
+
+/** 
+ * NO_SYS==1: Provides VERY minimal functionality. Otherwise,
+ * use lwIP facilities.
+ */
+#ifndef NO_SYS
+#define NO_SYS                          0
+#endif
+
+/**
+ * MEMCPY: override this if you have a faster implementation at hand than the
+ * one included in your C library
+ */
+#ifndef MEMCPY
+#define MEMCPY(dst,src,len)             memcpy(dst,src,len)
+#endif
+
+/**
+ * SMEMCPY: override this with care! Some compilers (e.g. gcc) can inline a
+ * call to memcpy() if the length is known at compile time and is small.
+ */
+#ifndef SMEMCPY
+#define SMEMCPY(dst,src,len)            memcpy(dst,src,len)
+#endif
+
+/*
+   ------------------------------------
+   ---------- Memory options ----------
+   ------------------------------------
+*/
+/**
+ * MEM_LIBC_MALLOC==1: Use malloc/free/realloc provided by your C-library
+ * instead of the lwip internal allocator. Can save code size if you
+ * already use it.
+ */
+#ifndef MEM_LIBC_MALLOC
+#define MEM_LIBC_MALLOC                 0
+#endif
+
+/**
+* MEMP_MEM_MALLOC==1: Use mem_malloc/mem_free instead of the lwip pool allocator.
+* Especially useful with MEM_LIBC_MALLOC but handle with care regarding execution
+* speed and usage from interrupts!
+*/
+#ifndef MEMP_MEM_MALLOC
+#define MEMP_MEM_MALLOC                 0
+#endif
+
+/**
+ * MEM_ALIGNMENT: should be set to the alignment of the CPU
+ *    4 byte alignment -> #define MEM_ALIGNMENT 4
+ *    2 byte alignment -> #define MEM_ALIGNMENT 2
+ */
+#ifndef MEM_ALIGNMENT
+#define MEM_ALIGNMENT                   1
+#endif
+
+/**
+ * MEM_SIZE: the size of the heap memory. If the application will send
+ * a lot of data that needs to be copied, this should be set high.
+ */
+#ifndef MEM_SIZE
+#define MEM_SIZE                        1600
+#endif
+
+/**
+ * MEMP_OVERFLOW_CHECK: memp overflow protection reserves a configurable
+ * amount of bytes before and after each memp element in every pool and fills
+ * it with a prominent default value.
+ *    MEMP_OVERFLOW_CHECK == 0 no checking
+ *    MEMP_OVERFLOW_CHECK == 1 checks each element when it is freed
+ *    MEMP_OVERFLOW_CHECK >= 2 checks each element in every pool every time
+ *      memp_malloc() or memp_free() is called (useful but slow!)
+ */
+#ifndef MEMP_OVERFLOW_CHECK
+#define MEMP_OVERFLOW_CHECK             0
+#endif
+
+/**
+ * MEMP_SANITY_CHECK==1: run a sanity check after each memp_free() to make
+ * sure that there are no cycles in the linked lists.
+ */
+#ifndef MEMP_SANITY_CHECK
+#define MEMP_SANITY_CHECK               0
+#endif
+
+/**
+ * MEM_USE_POOLS==1: Use an alternative to malloc() by allocating from a set
+ * of memory pools of various sizes. When mem_malloc is called, an element of
+ * the smallest pool that can provide the length needed is returned.
+ * To use this, MEMP_USE_CUSTOM_POOLS also has to be enabled.
+ */
+#ifndef MEM_USE_POOLS
+#define MEM_USE_POOLS                   0
+#endif
+
+/**
+ * MEM_USE_POOLS_TRY_BIGGER_POOL==1: if one malloc-pool is empty, try the next
+ * bigger pool - WARNING: THIS MIGHT WASTE MEMORY but it can make a system more
+ * reliable. */
+#ifndef MEM_USE_POOLS_TRY_BIGGER_POOL
+#define MEM_USE_POOLS_TRY_BIGGER_POOL   0
+#endif
+
+/**
+ * MEMP_USE_CUSTOM_POOLS==1: whether to include a user file lwippools.h
+ * that defines additional pools beyond the "standard" ones required
+ * by lwIP. If you set this to 1, you must have lwippools.h in your 
+ * inlude path somewhere. 
+ */
+#ifndef MEMP_USE_CUSTOM_POOLS
+#define MEMP_USE_CUSTOM_POOLS           0
+#endif
+
+/**
+ * Set this to 1 if you want to free PBUF_RAM pbufs (or call mem_free()) from
+ * interrupt context (or another context that doesn't allow waiting for a
+ * semaphore).
+ * If set to 1, mem_malloc will be protected by a semaphore and SYS_ARCH_PROTECT,
+ * while mem_free will only use SYS_ARCH_PROTECT. mem_malloc SYS_ARCH_UNPROTECTs
+ * with each loop so that mem_free can run.
+ *
+ * ATTENTION: As you can see from the above description, this leads to dis-/
+ * enabling interrupts often, which can be slow! Also, on low memory, mem_malloc
+ * can need longer.
+ *
+ * If you don't want that, at least for NO_SYS=0, you can still use the following
+ * functions to enqueue a deallocation call which then runs in the tcpip_thread
+ * context:
+ * - pbuf_free_callback(p);
+ * - mem_free_callback(m);
+ */
+#ifndef LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
+#define LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT 0
+#endif
+
+/*
+   ------------------------------------------------
+   ---------- Internal Memory Pool Sizes ----------
+   ------------------------------------------------
+*/
+/**
+ * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF).
+ * If the application sends a lot of data out of ROM (or other static memory),
+ * this should be set high.
+ */
+#ifndef MEMP_NUM_PBUF
+#define MEMP_NUM_PBUF                   16
+#endif
+
+/**
+ * MEMP_NUM_RAW_PCB: Number of raw connection PCBs
+ * (requires the LWIP_RAW option)
+ */
+#ifndef MEMP_NUM_RAW_PCB
+#define MEMP_NUM_RAW_PCB                4
+#endif
+
+/**
+ * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
+ * per active UDP "connection".
+ * (requires the LWIP_UDP option)
+ */
+#ifndef MEMP_NUM_UDP_PCB
+#define MEMP_NUM_UDP_PCB                4
+#endif
+
+/**
+ * MEMP_NUM_TCP_PCB: the number of simulatenously active TCP connections.
+ * (requires the LWIP_TCP option)
+ */
+#ifndef MEMP_NUM_TCP_PCB
+#define MEMP_NUM_TCP_PCB                5
+#endif
+
+/**
+ * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections.
+ * (requires the LWIP_TCP option)
+ */
+#ifndef MEMP_NUM_TCP_PCB_LISTEN
+#define MEMP_NUM_TCP_PCB_LISTEN         8
+#endif
+
+/**
+ * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments.
+ * (requires the LWIP_TCP option)
+ */
+#ifndef MEMP_NUM_TCP_SEG
+#define MEMP_NUM_TCP_SEG                16
+#endif
+
+/**
+ * MEMP_NUM_REASSDATA: the number of simultaneously IP packets queued for
+ * reassembly (whole packets, not fragments!)
+ */
+#ifndef MEMP_NUM_REASSDATA
+#define MEMP_NUM_REASSDATA              5
+#endif
+
+/**
+ * MEMP_NUM_ARP_QUEUE: the number of simulateously queued outgoing
+ * packets (pbufs) that are waiting for an ARP request (to resolve
+ * their destination address) to finish.
+ * (requires the ARP_QUEUEING option)
+ */
+#ifndef MEMP_NUM_ARP_QUEUE
+#define MEMP_NUM_ARP_QUEUE              30
+#endif
+
+/**
+ * MEMP_NUM_IGMP_GROUP: The number of multicast groups whose network interfaces
+ * can be members et the same time (one per netif - allsystems group -, plus one
+ * per netif membership).
+ * (requires the LWIP_IGMP option)
+ */
+#ifndef MEMP_NUM_IGMP_GROUP
+#define MEMP_NUM_IGMP_GROUP             8
+#endif
+
+/**
+ * MEMP_NUM_SYS_TIMEOUT: the number of simulateously active timeouts.
+ * (requires NO_SYS==0)
+ */
+#ifndef MEMP_NUM_SYS_TIMEOUT
+#define MEMP_NUM_SYS_TIMEOUT            3
+#endif
+
+/**
+ * MEMP_NUM_NETBUF: the number of struct netbufs.
+ * (only needed if you use the sequential API, like api_lib.c)
+ */
+#ifndef MEMP_NUM_NETBUF
+#define MEMP_NUM_NETBUF                 2
+#endif
+
+/**
+ * MEMP_NUM_NETCONN: the number of struct netconns.
+ * (only needed if you use the sequential API, like api_lib.c)
+ */
+#ifndef MEMP_NUM_NETCONN
+#define MEMP_NUM_NETCONN                4
+#endif
+
+/**
+ * MEMP_NUM_TCPIP_MSG_API: the number of struct tcpip_msg, which are used
+ * for callback/timeout API communication. 
+ * (only needed if you use tcpip.c)
+ */
+#ifndef MEMP_NUM_TCPIP_MSG_API
+#define MEMP_NUM_TCPIP_MSG_API          8
+#endif
+
+/**
+ * MEMP_NUM_TCPIP_MSG_INPKT: the number of struct tcpip_msg, which are used
+ * for incoming packets. 
+ * (only needed if you use tcpip.c)
+ */
+#ifndef MEMP_NUM_TCPIP_MSG_INPKT
+#define MEMP_NUM_TCPIP_MSG_INPKT        8
+#endif
+
+/**
+ * PBUF_POOL_SIZE: the number of buffers in the pbuf pool. 
+ */
+#ifndef PBUF_POOL_SIZE
+#define PBUF_POOL_SIZE                  16
+#endif
+
+/*
+   ---------------------------------
+   ---------- ARP options ----------
+   ---------------------------------
+*/
+/**
+ * LWIP_ARP==1: Enable ARP functionality.
+ */
+#ifndef LWIP_ARP
+#define LWIP_ARP                        1
+#endif
+
+/**
+ * ARP_TABLE_SIZE: Number of active MAC-IP address pairs cached.
+ */
+#ifndef ARP_TABLE_SIZE
+#define ARP_TABLE_SIZE                  10
+#endif
+
+/**
+ * ARP_QUEUEING==1: Outgoing packets are queued during hardware address
+ * resolution.
+ */
+#ifndef ARP_QUEUEING
+#define ARP_QUEUEING                    1
+#endif
+
+/**
+ * ETHARP_TRUST_IP_MAC==1: Incoming IP packets cause the ARP table to be
+ * updated with the source MAC and IP addresses supplied in the packet.
+ * You may want to disable this if you do not trust LAN peers to have the
+ * correct addresses, or as a limited approach to attempt to handle
+ * spoofing. If disabled, lwIP will need to make a new ARP request if
+ * the peer is not already in the ARP table, adding a little latency.
+ */
+#ifndef ETHARP_TRUST_IP_MAC
+#define ETHARP_TRUST_IP_MAC             1
+#endif
+
+/*
+   --------------------------------
+   ---------- IP options ----------
+   --------------------------------
+*/
+/**
+ * IP_FORWARD==1: Enables the ability to forward IP packets across network
+ * interfaces. If you are going to run lwIP on a device with only one network
+ * interface, define this to 0.
+ */
+#ifndef IP_FORWARD
+#define IP_FORWARD                      0
+#endif
+
+/**
+ * IP_OPTIONS_ALLOWED: Defines the behavior for IP options.
+ *      IP_OPTIONS_ALLOWED==0: All packets with IP options are dropped.
+ *      IP_OPTIONS_ALLOWED==1: IP options are allowed (but not parsed).
+ */
+#ifndef IP_OPTIONS_ALLOWED
+#define IP_OPTIONS_ALLOWED              1
+#endif
+
+/**
+ * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that
+ * this option does not affect outgoing packet sizes, which can be controlled
+ * via IP_FRAG.
+ */
+#ifndef IP_REASSEMBLY
+#define IP_REASSEMBLY                   1
+#endif
+
+/**
+ * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
+ * that this option does not affect incoming packet sizes, which can be
+ * controlled via IP_REASSEMBLY.
+ */
+#ifndef IP_FRAG
+#define IP_FRAG                         1
+#endif
+
+/**
+ * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
+ * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived
+ * in this time, the whole packet is discarded.
+ */
+#ifndef IP_REASS_MAXAGE
+#define IP_REASS_MAXAGE                 3
+#endif
+
+/**
+ * IP_REASS_MAX_PBUFS: Total maximum amount of pbufs waiting to be reassembled.
+ * Since the received pbufs are enqueued, be sure to configure
+ * PBUF_POOL_SIZE > IP_REASS_MAX_PBUFS so that the stack is still able to receive
+ * packets even if the maximum amount of fragments is enqueued for reassembly!
+ */
+#ifndef IP_REASS_MAX_PBUFS
+#define IP_REASS_MAX_PBUFS              10
+#endif
+
+/**
+ * IP_FRAG_USES_STATIC_BUF==1: Use a static MTU-sized buffer for IP
+ * fragmentation. Otherwise pbufs are allocated and reference the original
+ * packet data to be fragmented.
+ */
+#ifndef IP_FRAG_USES_STATIC_BUF
+#define IP_FRAG_USES_STATIC_BUF         1
+#endif
+
+/**
+ * IP_FRAG_MAX_MTU: Assumed max MTU on any interface for IP frag buffer
+ * (requires IP_FRAG_USES_STATIC_BUF==1)
+ */
+#if IP_FRAG_USES_STATIC_BUF && !defined(IP_FRAG_MAX_MTU)
+#define IP_FRAG_MAX_MTU                 1500
+#endif
+
+/**
+ * IP_DEFAULT_TTL: Default value for Time-To-Live used by transport layers.
+ */
+#ifndef IP_DEFAULT_TTL
+#define IP_DEFAULT_TTL                  255
+#endif
+
+/**
+ * IP_SOF_BROADCAST=1: Use the SOF_BROADCAST field to enable broadcast
+ * filter per pcb on udp and raw send operations. To enable broadcast filter
+ * on recv operations, you also have to set IP_SOF_BROADCAST_RECV=1.
+ */
+#ifndef IP_SOF_BROADCAST
+#define IP_SOF_BROADCAST                0
+#endif
+
+/**
+ * IP_SOF_BROADCAST_RECV (requires IP_SOF_BROADCAST=1) enable the broadcast
+ * filter on recv operations.
+ */
+#ifndef IP_SOF_BROADCAST_RECV
+#define IP_SOF_BROADCAST_RECV           0
+#endif
+
+/*
+   ----------------------------------
+   ---------- ICMP options ----------
+   ----------------------------------
+*/
+/**
+ * LWIP_ICMP==1: Enable ICMP module inside the IP stack.
+ * Be careful, disable that make your product non-compliant to RFC1122
+ */
+#ifndef LWIP_ICMP
+#define LWIP_ICMP                       1
+#endif
+
+/**
+ * ICMP_TTL: Default value for Time-To-Live used by ICMP packets.
+ */
+#ifndef ICMP_TTL
+#define ICMP_TTL                       (IP_DEFAULT_TTL)
+#endif
+
+/**
+ * LWIP_BROADCAST_PING==1: respond to broadcast pings (default is unicast only)
+ */
+#ifndef LWIP_BROADCAST_PING
+#define LWIP_BROADCAST_PING             0
+#endif
+
+/**
+ * LWIP_MULTICAST_PING==1: respond to multicast pings (default is unicast only)
+ */
+#ifndef LWIP_MULTICAST_PING
+#define LWIP_MULTICAST_PING             0
+#endif
+
+/*
+   ---------------------------------
+   ---------- RAW options ----------
+   ---------------------------------
+*/
+/**
+ * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
+ */
+#ifndef LWIP_RAW
+#define LWIP_RAW                        1
+#endif
+
+/**
+ * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
+ */
+#ifndef RAW_TTL
+#define RAW_TTL                        (IP_DEFAULT_TTL)
+#endif
+
+/*
+   ----------------------------------
+   ---------- DHCP options ----------
+   ----------------------------------
+*/
+/**
+ * LWIP_DHCP==1: Enable DHCP module.
+ */
+#ifndef LWIP_DHCP
+#define LWIP_DHCP                       0
+#endif
+
+/**
+ * DHCP_DOES_ARP_CHECK==1: Do an ARP check on the offered address.
+ */
+#ifndef DHCP_DOES_ARP_CHECK
+#define DHCP_DOES_ARP_CHECK             ((LWIP_DHCP) && (LWIP_ARP))
+#endif
+
+/*
+   ------------------------------------
+   ---------- AUTOIP options ----------
+   ------------------------------------
+*/
+/**
+ * LWIP_AUTOIP==1: Enable AUTOIP module.
+ */
+#ifndef LWIP_AUTOIP
+#define LWIP_AUTOIP                     0
+#endif
+
+/**
+ * LWIP_DHCP_AUTOIP_COOP==1: Allow DHCP and AUTOIP to be both enabled on
+ * the same interface at the same time.
+ */
+#ifndef LWIP_DHCP_AUTOIP_COOP
+#define LWIP_DHCP_AUTOIP_COOP           0
+#endif
+
+/**
+ * LWIP_DHCP_AUTOIP_COOP_TRIES: Set to the number of DHCP DISCOVER probes
+ * that should be sent before falling back on AUTOIP. This can be set
+ * as low as 1 to get an AutoIP address very quickly, but you should
+ * be prepared to handle a changing IP address when DHCP overrides
+ * AutoIP.
+ */
+#ifndef LWIP_DHCP_AUTOIP_COOP_TRIES
+#define LWIP_DHCP_AUTOIP_COOP_TRIES     9
+#endif
+
+/*
+   ----------------------------------
+   ---------- SNMP options ----------
+   ----------------------------------
+*/
+/**
+ * LWIP_SNMP==1: Turn on SNMP module. UDP must be available for SNMP
+ * transport.
+ */
+#ifndef LWIP_SNMP
+#define LWIP_SNMP                       0
+#endif
+
+/**
+ * SNMP_CONCURRENT_REQUESTS: Number of concurrent requests the module will
+ * allow. At least one request buffer is required. 
+ */
+#ifndef SNMP_CONCURRENT_REQUESTS
+#define SNMP_CONCURRENT_REQUESTS        1
+#endif
+
+/**
+ * SNMP_TRAP_DESTINATIONS: Number of trap destinations. At least one trap
+ * destination is required
+ */
+#ifndef SNMP_TRAP_DESTINATIONS
+#define SNMP_TRAP_DESTINATIONS          1
+#endif
+
+/**
+ * SNMP_PRIVATE_MIB: 
+ */
+#ifndef SNMP_PRIVATE_MIB
+#define SNMP_PRIVATE_MIB                0
+#endif
+
+/**
+ * Only allow SNMP write actions that are 'safe' (e.g. disabeling netifs is not
+ * a safe action and disabled when SNMP_SAFE_REQUESTS = 1).
+ * Unsafe requests are disabled by default!
+ */
+#ifndef SNMP_SAFE_REQUESTS
+#define SNMP_SAFE_REQUESTS              1
+#endif
+
+/*
+   ----------------------------------
+   ---------- IGMP options ----------
+   ----------------------------------
+*/
+/**
+ * LWIP_IGMP==1: Turn on IGMP module. 
+ */
+#ifndef LWIP_IGMP
+#define LWIP_IGMP                       0
+#endif
+
+/*
+   ----------------------------------
+   ---------- DNS options -----------
+   ----------------------------------
+*/
+/**
+ * LWIP_DNS==1: Turn on DNS module. UDP must be available for DNS
+ * transport.
+ */
+#ifndef LWIP_DNS
+#define LWIP_DNS                        0
+#endif
+
+/** DNS maximum number of entries to maintain locally. */
+#ifndef DNS_TABLE_SIZE
+#define DNS_TABLE_SIZE                  4
+#endif
+
+/** DNS maximum host name length supported in the name table. */
+#ifndef DNS_MAX_NAME_LENGTH
+#define DNS_MAX_NAME_LENGTH             256
+#endif
+
+/** The maximum of DNS servers */
+#ifndef DNS_MAX_SERVERS
+#define DNS_MAX_SERVERS                 2
+#endif
+
+/** DNS do a name checking between the query and the response. */
+#ifndef DNS_DOES_NAME_CHECK
+#define DNS_DOES_NAME_CHECK             1
+#endif
+
+/** DNS use a local buffer if DNS_USES_STATIC_BUF=0, a static one if
+    DNS_USES_STATIC_BUF=1, or a dynamic one if DNS_USES_STATIC_BUF=2.
+    The buffer will be of size DNS_MSG_SIZE */
+#ifndef DNS_USES_STATIC_BUF
+#define DNS_USES_STATIC_BUF             1
+#endif
+
+/** DNS message max. size. Default value is RFC compliant. */
+#ifndef DNS_MSG_SIZE
+#define DNS_MSG_SIZE                    512
+#endif
+
+/** DNS_LOCAL_HOSTLIST: Implements a local host-to-address list. If enabled,
+ *  you have to define
+ *    #define DNS_LOCAL_HOSTLIST_INIT {{"host1", 0x123}, {"host2", 0x234}}
+ *  (an array of structs name/address, where address is an u32_t in network
+ *  byte order).
+ *
+ *  Instead, you can also use an external function:
+ *  #define DNS_LOOKUP_LOCAL_EXTERN(x) extern u32_t my_lookup_function(const char *name)
+ *  that returns the IP address or INADDR_NONE if not found.
+ */
+#ifndef DNS_LOCAL_HOSTLIST
+#define DNS_LOCAL_HOSTLIST              0
+#endif /* DNS_LOCAL_HOSTLIST */
+
+/** If this is turned on, the local host-list can be dynamically changed
+ *  at runtime. */
+#ifndef DNS_LOCAL_HOSTLIST_IS_DYNAMIC
+#define DNS_LOCAL_HOSTLIST_IS_DYNAMIC   0
+#endif /* DNS_LOCAL_HOSTLIST_IS_DYNAMIC */
+
+/*
+   ---------------------------------
+   ---------- UDP options ----------
+   ---------------------------------
+*/
+/**
+ * LWIP_UDP==1: Turn on UDP.
+ */
+#ifndef LWIP_UDP
+#define LWIP_UDP                        1
+#endif
+
+/**
+ * LWIP_UDPLITE==1: Turn on UDP-Lite. (Requires LWIP_UDP)
+ */
+#ifndef LWIP_UDPLITE
+#define LWIP_UDPLITE                    0
+#endif
+
+/**
+ * UDP_TTL: Default Time-To-Live value.
+ */
+#ifndef UDP_TTL
+#define UDP_TTL                         (IP_DEFAULT_TTL)
+#endif
+
+/*
+   ---------------------------------
+   ---------- TCP options ----------
+   ---------------------------------
+*/
+/**
+ * LWIP_TCP==1: Turn on TCP.
+ */
+#ifndef LWIP_TCP
+#define LWIP_TCP                        1
+#endif
+
+/**
+ * TCP_TTL: Default Time-To-Live value.
+ */
+#ifndef TCP_TTL
+#define TCP_TTL                         (IP_DEFAULT_TTL)
+#endif
+
+/**
+ * TCP_WND: The size of a TCP window.  This must be at least 
+ * (2 * TCP_MSS) for things to work well
+ */
+#ifndef TCP_WND
+#define TCP_WND                         2048
+#endif 
+
+/**
+ * TCP_MAXRTX: Maximum number of retransmissions of data segments.
+ */
+#ifndef TCP_MAXRTX
+#define TCP_MAXRTX                      12
+#endif
+
+/**
+ * TCP_SYNMAXRTX: Maximum number of retransmissions of SYN segments.
+ */
+#ifndef TCP_SYNMAXRTX
+#define TCP_SYNMAXRTX                   6
+#endif
+
+/**
+ * TCP_QUEUE_OOSEQ==1: TCP will queue segments that arrive out of order.
+ * Define to 0 if your device is low on memory.
+ */
+#ifndef TCP_QUEUE_OOSEQ
+#define TCP_QUEUE_OOSEQ                 (LWIP_TCP)
+#endif
+
+/**
+ * TCP_MSS: TCP Maximum segment size. (default is 128, a *very*
+ * conservative default.)
+ * For the receive side, this MSS is advertised to the remote side
+ * when opening a connection. For the transmit size, this MSS sets
+ * an upper limit on the MSS advertised by the remote host.
+ */
+#ifndef TCP_MSS
+#define TCP_MSS                         128
+#endif
+
+/**
+ * TCP_CALCULATE_EFF_SEND_MSS: "The maximum size of a segment that TCP really
+ * sends, the 'effective send MSS,' MUST be the smaller of the send MSS (which
+ * reflects the available reassembly buffer size at the remote host) and the
+ * largest size permitted by the IP layer" (RFC 1122)
+ * Setting this to 1 enables code that checks TCP_MSS against the MTU of the
+ * netif used for a connection and limits the MSS if it would be too big otherwise.
+ */
+#ifndef TCP_CALCULATE_EFF_SEND_MSS
+#define TCP_CALCULATE_EFF_SEND_MSS      1
+#endif
+
+
+/**
+ * TCP_SND_BUF: TCP sender buffer space (bytes). 
+ */
+#ifndef TCP_SND_BUF
+#define TCP_SND_BUF                     256
+#endif
+
+/**
+ * TCP_SND_QUEUELEN: TCP sender buffer space (pbufs). This must be at least
+ * as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work.
+ */
+#ifndef TCP_SND_QUEUELEN
+#define TCP_SND_QUEUELEN                (4 * (TCP_SND_BUF/TCP_MSS))
+#endif
+
+/**
+ * TCP_SNDLOWAT: TCP writable space (bytes). This must be less than or equal
+ * to TCP_SND_BUF. It is the amount of space which must be available in the
+ * TCP snd_buf for select to return writable.
+ */
+#ifndef TCP_SNDLOWAT
+#define TCP_SNDLOWAT                    (TCP_SND_BUF/2)
+#endif
+
+/**
+ * TCP_LISTEN_BACKLOG: Enable the backlog option for tcp listen pcb.
+ */
+#ifndef TCP_LISTEN_BACKLOG
+#define TCP_LISTEN_BACKLOG              0
+#endif
+
+/**
+ * The maximum allowed backlog for TCP listen netconns.
+ * This backlog is used unless another is explicitly specified.
+ * 0xff is the maximum (u8_t).
+ */
+#ifndef TCP_DEFAULT_LISTEN_BACKLOG
+#define TCP_DEFAULT_LISTEN_BACKLOG      0xff
+#endif
+
+/**
+ * LWIP_TCP_TIMESTAMPS==1: support the TCP timestamp option.
+ */
+#ifndef LWIP_TCP_TIMESTAMPS
+#define LWIP_TCP_TIMESTAMPS             0
+#endif
+
+/**
+ * TCP_WND_UPDATE_THRESHOLD: difference in window to trigger an
+ * explicit window update
+ */
+#ifndef TCP_WND_UPDATE_THRESHOLD
+#define TCP_WND_UPDATE_THRESHOLD   (TCP_WND / 4)
+#endif
+
+/**
+ * LWIP_EVENT_API and LWIP_CALLBACK_API: Only one of these should be set to 1.
+ *     LWIP_EVENT_API==1: The user defines lwip_tcp_event() to receive all
+ *         events (accept, sent, etc) that happen in the system.
+ *     LWIP_CALLBACK_API==1: The PCB callback function is called directly
+ *         for the event.
+ */
+#ifndef LWIP_EVENT_API
+#define LWIP_EVENT_API                  0
+#define LWIP_CALLBACK_API               1
+#else 
+#define LWIP_EVENT_API                  1
+#define LWIP_CALLBACK_API               0
+#endif
+
+
+/*
+   ----------------------------------
+   ---------- Pbuf options ----------
+   ----------------------------------
+*/
+/**
+ * PBUF_LINK_HLEN: the number of bytes that should be allocated for a
+ * link level header. The default is 14, the standard value for
+ * Ethernet.
+ */
+#ifndef PBUF_LINK_HLEN
+#define PBUF_LINK_HLEN                  14
+#endif
+
+/**
+ * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is
+ * designed to accomodate single full size TCP frame in one pbuf, including
+ * TCP_MSS, IP header, and link header.
+ */
+#ifndef PBUF_POOL_BUFSIZE
+#define PBUF_POOL_BUFSIZE               LWIP_MEM_ALIGN_SIZE(TCP_MSS+40+PBUF_LINK_HLEN)
+#endif
+
+/*
+   ------------------------------------------------
+   ---------- Network Interfaces options ----------
+   ------------------------------------------------
+*/
+/**
+ * LWIP_NETIF_HOSTNAME==1: use DHCP_OPTION_HOSTNAME with netif's hostname
+ * field.
+ */
+#ifndef LWIP_NETIF_HOSTNAME
+#define LWIP_NETIF_HOSTNAME             0
+#endif
+
+/**
+ * LWIP_NETIF_API==1: Support netif api (in netifapi.c)
+ */
+#ifndef LWIP_NETIF_API
+#define LWIP_NETIF_API                  0
+#endif
+
+/**
+ * LWIP_NETIF_STATUS_CALLBACK==1: Support a callback function whenever an interface
+ * changes its up/down status (i.e., due to DHCP IP acquistion)
+ */
+#ifndef LWIP_NETIF_STATUS_CALLBACK
+#define LWIP_NETIF_STATUS_CALLBACK      0
+#endif
+
+/**
+ * LWIP_NETIF_LINK_CALLBACK==1: Support a callback function from an interface
+ * whenever the link changes (i.e., link down)
+ */
+#ifndef LWIP_NETIF_LINK_CALLBACK
+#define LWIP_NETIF_LINK_CALLBACK        0
+#endif
+
+/**
+ * LWIP_NETIF_HWADDRHINT==1: Cache link-layer-address hints (e.g. table
+ * indices) in struct netif. TCP and UDP can make use of this to prevent
+ * scanning the ARP table for every sent packet. While this is faster for big
+ * ARP tables or many concurrent connections, it might be counterproductive
+ * if you have a tiny ARP table or if there never are concurrent connections.
+ */
+#ifndef LWIP_NETIF_HWADDRHINT
+#define LWIP_NETIF_HWADDRHINT           0
+#endif
+
+/**
+ * LWIP_NETIF_LOOPBACK==1: Support sending packets with a destination IP
+ * address equal to the netif IP address, looping them back up the stack.
+ */
+#ifndef LWIP_NETIF_LOOPBACK
+#define LWIP_NETIF_LOOPBACK             0
+#endif
+
+/**
+ * LWIP_LOOPBACK_MAX_PBUFS: Maximum number of pbufs on queue for loopback
+ * sending for each netif (0 = disabled)
+ */
+#ifndef LWIP_LOOPBACK_MAX_PBUFS
+#define LWIP_LOOPBACK_MAX_PBUFS         0
+#endif
+
+/**
+ * LWIP_NETIF_LOOPBACK_MULTITHREADING: Indicates whether threading is enabled in
+ * the system, as netifs must change how they behave depending on this setting
+ * for the LWIP_NETIF_LOOPBACK option to work.
+ * Setting this is needed to avoid reentering non-reentrant functions like
+ * tcp_input().
+ *    LWIP_NETIF_LOOPBACK_MULTITHREADING==1: Indicates that the user is using a
+ *       multithreaded environment like tcpip.c. In this case, netif->input()
+ *       is called directly.
+ *    LWIP_NETIF_LOOPBACK_MULTITHREADING==0: Indicates a polling (or NO_SYS) setup.
+ *       The packets are put on a list and netif_poll() must be called in
+ *       the main application loop.
+ */
+#ifndef LWIP_NETIF_LOOPBACK_MULTITHREADING
+#define LWIP_NETIF_LOOPBACK_MULTITHREADING    (!NO_SYS)
+#endif
+
+/**
+ * LWIP_NETIF_TX_SINGLE_PBUF: if this is set to 1, lwIP tries to put all data
+ * to be sent into one single pbuf. This is for compatibility with DMA-enabled
+ * MACs that do not support scatter-gather.
+ * Beware that this might involve CPU-memcpy before transmitting that would not
+ * be needed without this flag! Use this only if you need to!
+ *
+ * @todo: TCP and IP-frag do not work with this, yet:
+ */
+#ifndef LWIP_NETIF_TX_SINGLE_PBUF
+#define LWIP_NETIF_TX_SINGLE_PBUF             0
+#endif /* LWIP_NETIF_TX_SINGLE_PBUF */
+
+/*
+   ------------------------------------
+   ---------- LOOPIF options ----------
+   ------------------------------------
+*/
+/**
+ * LWIP_HAVE_LOOPIF==1: Support loop interface (127.0.0.1) and loopif.c
+ */
+#ifndef LWIP_HAVE_LOOPIF
+#define LWIP_HAVE_LOOPIF                0
+#endif
+
+/*
+   ------------------------------------
+   ---------- SLIPIF options ----------
+   ------------------------------------
+*/
+/**
+ * LWIP_HAVE_SLIPIF==1: Support slip interface and slipif.c
+ */
+#ifndef LWIP_HAVE_SLIPIF
+#define LWIP_HAVE_SLIPIF                0
+#endif
+
+/*
+   ------------------------------------
+   ---------- Thread options ----------
+   ------------------------------------
+*/
+/**
+ * TCPIP_THREAD_NAME: The name assigned to the main tcpip thread.
+ */
+#ifndef TCPIP_THREAD_NAME
+#define TCPIP_THREAD_NAME              "tcpip_thread"
+#endif
+
+/**
+ * TCPIP_THREAD_STACKSIZE: The stack size used by the main tcpip thread.
+ * The stack size value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef TCPIP_THREAD_STACKSIZE
+#define TCPIP_THREAD_STACKSIZE          0
+#endif
+
+/**
+ * TCPIP_THREAD_PRIO: The priority assigned to the main tcpip thread.
+ * The priority value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef TCPIP_THREAD_PRIO
+#define TCPIP_THREAD_PRIO               1
+#endif
+
+/**
+ * TCPIP_MBOX_SIZE: The mailbox size for the tcpip thread messages
+ * The queue size value itself is platform-dependent, but is passed to
+ * sys_mbox_new() when tcpip_init is called.
+ */
+#ifndef TCPIP_MBOX_SIZE
+#define TCPIP_MBOX_SIZE                 0
+#endif
+
+/**
+ * SLIPIF_THREAD_NAME: The name assigned to the slipif_loop thread.
+ */
+#ifndef SLIPIF_THREAD_NAME
+#define SLIPIF_THREAD_NAME             "slipif_loop"
+#endif
+
+/**
+ * SLIP_THREAD_STACKSIZE: The stack size used by the slipif_loop thread.
+ * The stack size value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef SLIPIF_THREAD_STACKSIZE
+#define SLIPIF_THREAD_STACKSIZE         0
+#endif
+
+/**
+ * SLIPIF_THREAD_PRIO: The priority assigned to the slipif_loop thread.
+ * The priority value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef SLIPIF_THREAD_PRIO
+#define SLIPIF_THREAD_PRIO              1
+#endif
+
+/**
+ * PPP_THREAD_NAME: The name assigned to the pppMain thread.
+ */
+#ifndef PPP_THREAD_NAME
+#define PPP_THREAD_NAME                "pppMain"
+#endif
+
+/**
+ * PPP_THREAD_STACKSIZE: The stack size used by the pppMain thread.
+ * The stack size value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef PPP_THREAD_STACKSIZE
+#define PPP_THREAD_STACKSIZE            0
+#endif
+
+/**
+ * PPP_THREAD_PRIO: The priority assigned to the pppMain thread.
+ * The priority value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef PPP_THREAD_PRIO
+#define PPP_THREAD_PRIO                 1
+#endif
+
+/**
+ * DEFAULT_THREAD_NAME: The name assigned to any other lwIP thread.
+ */
+#ifndef DEFAULT_THREAD_NAME
+#define DEFAULT_THREAD_NAME            "lwIP"
+#endif
+
+/**
+ * DEFAULT_THREAD_STACKSIZE: The stack size used by any other lwIP thread.
+ * The stack size value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef DEFAULT_THREAD_STACKSIZE
+#define DEFAULT_THREAD_STACKSIZE        0
+#endif
+
+/**
+ * DEFAULT_THREAD_PRIO: The priority assigned to any other lwIP thread.
+ * The priority value itself is platform-dependent, but is passed to
+ * sys_thread_new() when the thread is created.
+ */
+#ifndef DEFAULT_THREAD_PRIO
+#define DEFAULT_THREAD_PRIO             1
+#endif
+
+/**
+ * DEFAULT_RAW_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
+ * NETCONN_RAW. The queue size value itself is platform-dependent, but is passed
+ * to sys_mbox_new() when the recvmbox is created.
+ */
+#ifndef DEFAULT_RAW_RECVMBOX_SIZE
+#define DEFAULT_RAW_RECVMBOX_SIZE       0
+#endif
+
+/**
+ * DEFAULT_UDP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
+ * NETCONN_UDP. The queue size value itself is platform-dependent, but is passed
+ * to sys_mbox_new() when the recvmbox is created.
+ */
+#ifndef DEFAULT_UDP_RECVMBOX_SIZE
+#define DEFAULT_UDP_RECVMBOX_SIZE       0
+#endif
+
+/**
+ * DEFAULT_TCP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
+ * NETCONN_TCP. The queue size value itself is platform-dependent, but is passed
+ * to sys_mbox_new() when the recvmbox is created.
+ */
+#ifndef DEFAULT_TCP_RECVMBOX_SIZE
+#define DEFAULT_TCP_RECVMBOX_SIZE       0
+#endif
+
+/**
+ * DEFAULT_ACCEPTMBOX_SIZE: The mailbox size for the incoming connections.
+ * The queue size value itself is platform-dependent, but is passed to
+ * sys_mbox_new() when the acceptmbox is created.
+ */
+#ifndef DEFAULT_ACCEPTMBOX_SIZE
+#define DEFAULT_ACCEPTMBOX_SIZE         0
+#endif
+
+/*
+   ----------------------------------------------
+   ---------- Sequential layer options ----------
+   ----------------------------------------------
+*/
+/**
+ * LWIP_TCPIP_CORE_LOCKING: (EXPERIMENTAL!)
+ * Don't use it if you're not an active lwIP project member
+ */
+#ifndef LWIP_TCPIP_CORE_LOCKING
+#define LWIP_TCPIP_CORE_LOCKING         0
+#endif
+
+/**
+ * LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c)
+ */
+#ifndef LWIP_NETCONN
+#define LWIP_NETCONN                    1
+#endif
+
+/*
+   ------------------------------------
+   ---------- Socket options ----------
+   ------------------------------------
+*/
+/**
+ * LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
+ */
+#ifndef LWIP_SOCKET
+#define LWIP_SOCKET                     1
+#endif
+
+/**
+ * LWIP_COMPAT_SOCKETS==1: Enable BSD-style sockets functions names.
+ * (only used if you use sockets.c)
+ */
+#ifndef LWIP_COMPAT_SOCKETS
+#define LWIP_COMPAT_SOCKETS             1
+#endif
+
+/**
+ * LWIP_POSIX_SOCKETS_IO_NAMES==1: Enable POSIX-style sockets functions names.
+ * Disable this option if you use a POSIX operating system that uses the same
+ * names (read, write & close). (only used if you use sockets.c)
+ */
+#ifndef LWIP_POSIX_SOCKETS_IO_NAMES
+#define LWIP_POSIX_SOCKETS_IO_NAMES     1
+#endif
+
+/**
+ * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT
+ * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set
+ * in seconds. (does not require sockets.c, and will affect tcp.c)
+ */
+#ifndef LWIP_TCP_KEEPALIVE
+#define LWIP_TCP_KEEPALIVE              0
+#endif
+
+/**
+ * LWIP_SO_RCVTIMEO==1: Enable SO_RCVTIMEO processing.
+ */
+#ifndef LWIP_SO_RCVTIMEO
+#define LWIP_SO_RCVTIMEO                0
+#endif
+
+/**
+ * LWIP_SO_RCVBUF==1: Enable SO_RCVBUF processing.
+ */
+#ifndef LWIP_SO_RCVBUF
+#define LWIP_SO_RCVBUF                  0
+#endif
+
+/**
+ * If LWIP_SO_RCVBUF is used, this is the default value for recv_bufsize.
+ */
+#ifndef RECV_BUFSIZE_DEFAULT
+#define RECV_BUFSIZE_DEFAULT            INT_MAX
+#endif
+
+/**
+ * SO_REUSE==1: Enable SO_REUSEADDR and SO_REUSEPORT options. DO NOT USE!
+ */
+#ifndef SO_REUSE
+#define SO_REUSE                        0
+#endif
+
+/*
+   ----------------------------------------
+   ---------- Statistics options ----------
+   ----------------------------------------
+*/
+/**
+ * LWIP_STATS==1: Enable statistics collection in lwip_stats.
+ */
+#ifndef LWIP_STATS
+#define LWIP_STATS                      1
+#endif
+
+#if LWIP_STATS
+
+/**
+ * LWIP_STATS_DISPLAY==1: Compile in the statistics output functions.
+ */
+#ifndef LWIP_STATS_DISPLAY
+#define LWIP_STATS_DISPLAY              0
+#endif
+
+/**
+ * LINK_STATS==1: Enable link stats.
+ */
+#ifndef LINK_STATS
+#define LINK_STATS                      1
+#endif
+
+/**
+ * ETHARP_STATS==1: Enable etharp stats.
+ */
+#ifndef ETHARP_STATS
+#define ETHARP_STATS                    (LWIP_ARP)
+#endif
+
+/**
+ * IP_STATS==1: Enable IP stats.
+ */
+#ifndef IP_STATS
+#define IP_STATS                        1
+#endif
+
+/**
+ * IPFRAG_STATS==1: Enable IP fragmentation stats. Default is
+ * on if using either frag or reass.
+ */
+#ifndef IPFRAG_STATS
+#define IPFRAG_STATS                    (IP_REASSEMBLY || IP_FRAG)
+#endif
+
+/**
+ * ICMP_STATS==1: Enable ICMP stats.
+ */
+#ifndef ICMP_STATS
+#define ICMP_STATS                      1
+#endif
+
+/**
+ * IGMP_STATS==1: Enable IGMP stats.
+ */
+#ifndef IGMP_STATS
+#define IGMP_STATS                      (LWIP_IGMP)
+#endif
+
+/**
+ * UDP_STATS==1: Enable UDP stats. Default is on if
+ * UDP enabled, otherwise off.
+ */
+#ifndef UDP_STATS
+#define UDP_STATS                       (LWIP_UDP)
+#endif
+
+/**
+ * TCP_STATS==1: Enable TCP stats. Default is on if TCP
+ * enabled, otherwise off.
+ */
+#ifndef TCP_STATS
+#define TCP_STATS                       (LWIP_TCP)
+#endif
+
+/**
+ * MEM_STATS==1: Enable mem.c stats.
+ */
+#ifndef MEM_STATS
+#define MEM_STATS                       1
+#endif
+
+/**
+ * MEMP_STATS==1: Enable memp.c pool stats.
+ */
+#ifndef MEMP_STATS
+#define MEMP_STATS                      1
+#endif
+
+/**
+ * SYS_STATS==1: Enable system stats (sem and mbox counts, etc).
+ */
+#ifndef SYS_STATS
+#define SYS_STATS                       1
+#endif
+
+#else
+
+#define LINK_STATS                      0
+#define IP_STATS                        0
+#define IPFRAG_STATS                    0
+#define ICMP_STATS                      0
+#define IGMP_STATS                      0
+#define UDP_STATS                       0
+#define TCP_STATS                       0
+#define MEM_STATS                       0
+#define MEMP_STATS                      0
+#define SYS_STATS                       0
+#define LWIP_STATS_DISPLAY              0
+
+#endif /* LWIP_STATS */
+
+/*
+   ---------------------------------
+   ---------- PPP options ----------
+   ---------------------------------
+*/
+/**
+ * PPP_SUPPORT==1: Enable PPP.
+ */
+#ifndef PPP_SUPPORT
+#define PPP_SUPPORT                     0
+#endif
+
+/**
+ * PPPOE_SUPPORT==1: Enable PPP Over Ethernet
+ */
+#ifndef PPPOE_SUPPORT
+#define PPPOE_SUPPORT                   0
+#endif
+
+/**
+ * PPPOS_SUPPORT==1: Enable PPP Over Serial
+ */
+#ifndef PPPOS_SUPPORT
+#define PPPOS_SUPPORT                   PPP_SUPPORT
+#endif
+
+#if PPP_SUPPORT
+
+/**
+ * NUM_PPP: Max PPP sessions.
+ */
+#ifndef NUM_PPP
+#define NUM_PPP                         1
+#endif
+
+/**
+ * PAP_SUPPORT==1: Support PAP.
+ */
+#ifndef PAP_SUPPORT
+#define PAP_SUPPORT                     0
+#endif
+
+/**
+ * CHAP_SUPPORT==1: Support CHAP.
+ */
+#ifndef CHAP_SUPPORT
+#define CHAP_SUPPORT                    0
+#endif
+
+/**
+ * MSCHAP_SUPPORT==1: Support MSCHAP. CURRENTLY NOT SUPPORTED! DO NOT SET!
+ */
+#ifndef MSCHAP_SUPPORT
+#define MSCHAP_SUPPORT                  0
+#endif
+
+/**
+ * CBCP_SUPPORT==1: Support CBCP. CURRENTLY NOT SUPPORTED! DO NOT SET!
+ */
+#ifndef CBCP_SUPPORT
+#define CBCP_SUPPORT                    0
+#endif
+
+/**
+ * CCP_SUPPORT==1: Support CCP. CURRENTLY NOT SUPPORTED! DO NOT SET!
+ */
+#ifndef CCP_SUPPORT
+#define CCP_SUPPORT                     0
+#endif
+
+/**
+ * VJ_SUPPORT==1: Support VJ header compression.
+ */
+#ifndef VJ_SUPPORT
+#define VJ_SUPPORT                      0
+#endif
+
+/**
+ * MD5_SUPPORT==1: Support MD5 (see also CHAP).
+ */
+#ifndef MD5_SUPPORT
+#define MD5_SUPPORT                     0
+#endif
+
+/*
+ * Timeouts
+ */
+#ifndef FSM_DEFTIMEOUT
+#define FSM_DEFTIMEOUT                  6       /* Timeout time in seconds */
+#endif
+
+#ifndef FSM_DEFMAXTERMREQS
+#define FSM_DEFMAXTERMREQS              2       /* Maximum Terminate-Request transmissions */
+#endif
+
+#ifndef FSM_DEFMAXCONFREQS
+#define FSM_DEFMAXCONFREQS              10      /* Maximum Configure-Request transmissions */
+#endif
+
+#ifndef FSM_DEFMAXNAKLOOPS
+#define FSM_DEFMAXNAKLOOPS              5       /* Maximum number of nak loops */
+#endif
+
+#ifndef UPAP_DEFTIMEOUT
+#define UPAP_DEFTIMEOUT                 6       /* Timeout (seconds) for retransmitting req */
+#endif
+
+#ifndef UPAP_DEFREQTIME
+#define UPAP_DEFREQTIME                 30      /* Time to wait for auth-req from peer */
+#endif
+
+#ifndef CHAP_DEFTIMEOUT
+#define CHAP_DEFTIMEOUT                 6       /* Timeout time in seconds */
+#endif
+
+#ifndef CHAP_DEFTRANSMITS
+#define CHAP_DEFTRANSMITS               10      /* max # times to send challenge */
+#endif
+
+/* Interval in seconds between keepalive echo requests, 0 to disable. */
+#ifndef LCP_ECHOINTERVAL
+#define LCP_ECHOINTERVAL                0
+#endif
+
+/* Number of unanswered echo requests before failure. */
+#ifndef LCP_MAXECHOFAILS
+#define LCP_MAXECHOFAILS                3
+#endif
+
+/* Max Xmit idle time (in jiffies) before resend flag char. */
+#ifndef PPP_MAXIDLEFLAG
+#define PPP_MAXIDLEFLAG                 100
+#endif
+
+/*
+ * Packet sizes
+ *
+ * Note - lcp shouldn't be allowed to negotiate stuff outside these
+ *    limits.  See lcp.h in the pppd directory.
+ * (XXX - these constants should simply be shared by lcp.c instead
+ *    of living in lcp.h)
+ */
+#define PPP_MTU                         1500     /* Default MTU (size of Info field) */
+#ifndef PPP_MAXMTU
+/* #define PPP_MAXMTU  65535 - (PPP_HDRLEN + PPP_FCSLEN) */
+#define PPP_MAXMTU                      1500 /* Largest MTU we allow */
+#endif
+#define PPP_MINMTU                      64
+#define PPP_MRU                         1500     /* default MRU = max length of info field */
+#define PPP_MAXMRU                      1500     /* Largest MRU we allow */
+#ifndef PPP_DEFMRU
+#define PPP_DEFMRU                      296             /* Try for this */
+#endif
+#define PPP_MINMRU                      128             /* No MRUs below this */
+
+
+#define MAXNAMELEN                      256     /* max length of hostname or name for auth */
+#define MAXSECRETLEN                    256     /* max length of password or secret */
+
+#endif /* PPP_SUPPORT */
+
+/*
+   --------------------------------------
+   ---------- Checksum options ----------
+   --------------------------------------
+*/
+/**
+ * CHECKSUM_GEN_IP==1: Generate checksums in software for outgoing IP packets.
+ */
+#ifndef CHECKSUM_GEN_IP
+#define CHECKSUM_GEN_IP                 1
+#endif
+ 
+/**
+ * CHECKSUM_GEN_UDP==1: Generate checksums in software for outgoing UDP packets.
+ */
+#ifndef CHECKSUM_GEN_UDP
+#define CHECKSUM_GEN_UDP                1
+#endif
+ 
+/**
+ * CHECKSUM_GEN_TCP==1: Generate checksums in software for outgoing TCP packets.
+ */
+#ifndef CHECKSUM_GEN_TCP
+#define CHECKSUM_GEN_TCP                1
+#endif
+ 
+/**
+ * CHECKSUM_CHECK_IP==1: Check checksums in software for incoming IP packets.
+ */
+#ifndef CHECKSUM_CHECK_IP
+#define CHECKSUM_CHECK_IP               1
+#endif
+ 
+/**
+ * CHECKSUM_CHECK_UDP==1: Check checksums in software for incoming UDP packets.
+ */
+#ifndef CHECKSUM_CHECK_UDP
+#define CHECKSUM_CHECK_UDP              1
+#endif
+
+/**
+ * CHECKSUM_CHECK_TCP==1: Check checksums in software for incoming TCP packets.
+ */
+#ifndef CHECKSUM_CHECK_TCP
+#define CHECKSUM_CHECK_TCP              1
+#endif
+
+/*
+   ---------------------------------------
+   ---------- Debugging options ----------
+   ---------------------------------------
+*/
+/**
+ * LWIP_DBG_MIN_LEVEL: After masking, the value of the debug is
+ * compared against this value. If it is smaller, then debugging
+ * messages are written.
+ */
+#ifndef LWIP_DBG_MIN_LEVEL
+#define LWIP_DBG_MIN_LEVEL              LWIP_DBG_LEVEL_OFF
+#endif
+
+/**
+ * LWIP_DBG_TYPES_ON: A mask that can be used to globally enable/disable
+ * debug messages of certain types.
+ */
+#ifndef LWIP_DBG_TYPES_ON
+#define LWIP_DBG_TYPES_ON               LWIP_DBG_ON
+#endif
+
+/**
+ * ETHARP_DEBUG: Enable debugging in etharp.c.
+ */
+#ifndef ETHARP_DEBUG
+#define ETHARP_DEBUG                    LWIP_DBG_OFF
+#endif
+
+/**
+ * NETIF_DEBUG: Enable debugging in netif.c.
+ */
+#ifndef NETIF_DEBUG
+#define NETIF_DEBUG                     LWIP_DBG_OFF
+#endif
+
+/**
+ * PBUF_DEBUG: Enable debugging in pbuf.c.
+ */
+#ifndef PBUF_DEBUG
+#define PBUF_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * API_LIB_DEBUG: Enable debugging in api_lib.c.
+ */
+#ifndef API_LIB_DEBUG
+#define API_LIB_DEBUG                   LWIP_DBG_OFF
+#endif
+
+/**
+ * API_MSG_DEBUG: Enable debugging in api_msg.c.
+ */
+#ifndef API_MSG_DEBUG
+#define API_MSG_DEBUG                   LWIP_DBG_OFF
+#endif
+
+/**
+ * SOCKETS_DEBUG: Enable debugging in sockets.c.
+ */
+#ifndef SOCKETS_DEBUG
+#define SOCKETS_DEBUG                   LWIP_DBG_OFF
+#endif
+
+/**
+ * ICMP_DEBUG: Enable debugging in icmp.c.
+ */
+#ifndef ICMP_DEBUG
+#define ICMP_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * IGMP_DEBUG: Enable debugging in igmp.c.
+ */
+#ifndef IGMP_DEBUG
+#define IGMP_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * INET_DEBUG: Enable debugging in inet.c.
+ */
+#ifndef INET_DEBUG
+#define INET_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * IP_DEBUG: Enable debugging for IP.
+ */
+#ifndef IP_DEBUG
+#define IP_DEBUG                        LWIP_DBG_OFF
+#endif
+
+/**
+ * IP_REASS_DEBUG: Enable debugging in ip_frag.c for both frag & reass.
+ */
+#ifndef IP_REASS_DEBUG
+#define IP_REASS_DEBUG                  LWIP_DBG_OFF
+#endif
+
+/**
+ * RAW_DEBUG: Enable debugging in raw.c.
+ */
+#ifndef RAW_DEBUG
+#define RAW_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/**
+ * MEM_DEBUG: Enable debugging in mem.c.
+ */
+#ifndef MEM_DEBUG
+#define MEM_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/**
+ * MEMP_DEBUG: Enable debugging in memp.c.
+ */
+#ifndef MEMP_DEBUG
+#define MEMP_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * SYS_DEBUG: Enable debugging in sys.c.
+ */
+#ifndef SYS_DEBUG
+#define SYS_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_DEBUG: Enable debugging for TCP.
+ */
+#ifndef TCP_DEBUG
+#define TCP_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_INPUT_DEBUG: Enable debugging in tcp_in.c for incoming debug.
+ */
+#ifndef TCP_INPUT_DEBUG
+#define TCP_INPUT_DEBUG                 LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_FR_DEBUG: Enable debugging in tcp_in.c for fast retransmit.
+ */
+#ifndef TCP_FR_DEBUG
+#define TCP_FR_DEBUG                    LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_RTO_DEBUG: Enable debugging in TCP for retransmit
+ * timeout.
+ */
+#ifndef TCP_RTO_DEBUG
+#define TCP_RTO_DEBUG                   LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_CWND_DEBUG: Enable debugging for TCP congestion window.
+ */
+#ifndef TCP_CWND_DEBUG
+#define TCP_CWND_DEBUG                  LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_WND_DEBUG: Enable debugging in tcp_in.c for window updating.
+ */
+#ifndef TCP_WND_DEBUG
+#define TCP_WND_DEBUG                   LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_OUTPUT_DEBUG: Enable debugging in tcp_out.c output functions.
+ */
+#ifndef TCP_OUTPUT_DEBUG
+#define TCP_OUTPUT_DEBUG                LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_RST_DEBUG: Enable debugging for TCP with the RST message.
+ */
+#ifndef TCP_RST_DEBUG
+#define TCP_RST_DEBUG                   LWIP_DBG_OFF
+#endif
+
+/**
+ * TCP_QLEN_DEBUG: Enable debugging for TCP queue lengths.
+ */
+#ifndef TCP_QLEN_DEBUG
+#define TCP_QLEN_DEBUG                  LWIP_DBG_OFF
+#endif
+
+/**
+ * UDP_DEBUG: Enable debugging in UDP.
+ */
+#ifndef UDP_DEBUG
+#define UDP_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/**
+ * TCPIP_DEBUG: Enable debugging in tcpip.c.
+ */
+#ifndef TCPIP_DEBUG
+#define TCPIP_DEBUG                     LWIP_DBG_OFF
+#endif
+
+/**
+ * PPP_DEBUG: Enable debugging for PPP.
+ */
+#ifndef PPP_DEBUG
+#define PPP_DEBUG                       LWIP_DBG_OFF
+#endif
+
+/**
+ * SLIP_DEBUG: Enable debugging in slipif.c.
+ */
+#ifndef SLIP_DEBUG
+#define SLIP_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * DHCP_DEBUG: Enable debugging in dhcp.c.
+ */
+#ifndef DHCP_DEBUG
+#define DHCP_DEBUG                      LWIP_DBG_OFF
+#endif
+
+/**
+ * AUTOIP_DEBUG: Enable debugging in autoip.c.
+ */
+#ifndef AUTOIP_DEBUG
+#define AUTOIP_DEBUG                    LWIP_DBG_OFF
+#endif
+
+/**
+ * SNMP_MSG_DEBUG: Enable debugging for SNMP messages.
+ */
+#ifndef SNMP_MSG_DEBUG
+#define SNMP_MSG_DEBUG                  LWIP_DBG_OFF
+#endif
+
+/**
+ * SNMP_MIB_DEBUG: Enable debugging for SNMP MIBs.
+ */
+#ifndef SNMP_MIB_DEBUG
+#define SNMP_MIB_DEBUG                  LWIP_DBG_OFF
+#endif
+
+/**
+ * DNS_DEBUG: Enable debugging for DNS.
+ */
+#ifndef DNS_DEBUG
+#define DNS_DEBUG                       LWIP_DBG_OFF
+#endif
+
+#endif /* __LWIP_OPT_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/pbuf.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/pbuf.h
new file mode 100644
index 000000000..8380f65da
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/pbuf.h
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef __LWIP_PBUF_H__
+#define __LWIP_PBUF_H__
+
+#include "lwip/opt.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define PBUF_TRANSPORT_HLEN 20
+#define PBUF_IP_HLEN        20
+
+typedef enum {
+  PBUF_TRANSPORT,
+  PBUF_IP,
+  PBUF_LINK,
+  PBUF_RAW
+} pbuf_layer;
+
+typedef enum {
+  PBUF_RAM, /* pbuf data is stored in RAM */
+  PBUF_ROM, /* pbuf data is stored in ROM */
+  PBUF_REF, /* pbuf comes from the pbuf pool */
+  PBUF_POOL /* pbuf payload refers to RAM */
+} pbuf_type;
+
+
+/** indicates this packet's data should be immediately passed to the application */
+#define PBUF_FLAG_PUSH 0x01U
+
+struct pbuf {
+  /** next pbuf in singly linked pbuf chain */
+  struct pbuf *next;
+
+  /** pointer to the actual data in the buffer */
+  void *payload;
+  
+  /**
+   * total length of this buffer and all next buffers in chain
+   * belonging to the same packet.
+   *
+   * For non-queue packet chains this is the invariant:
+   * p->tot_len == p->len + (p->next? p->next->tot_len: 0)
+   */
+  u16_t tot_len;
+  
+  /** length of this buffer */
+  u16_t len;  
+
+  /** pbuf_type as u8_t instead of enum to save space */
+  u8_t /*pbuf_type*/ type;
+
+  /** misc flags */
+  u8_t flags;
+
+  /**
+   * the reference count always equals the number of pointers
+   * that refer to this pbuf. This can be pointers from an application,
+   * the stack itself, or pbuf->next pointers from a chain.
+   */
+  u16_t ref;
+  
+};
+
+/* Initializes the pbuf module. This call is empty for now, but may not be in future. */
+#define pbuf_init()
+
+struct pbuf *pbuf_alloc(pbuf_layer l, u16_t size, pbuf_type type);
+void pbuf_realloc(struct pbuf *p, u16_t size); 
+u8_t pbuf_header(struct pbuf *p, s16_t header_size);
+void pbuf_ref(struct pbuf *p);
+void pbuf_ref_chain(struct pbuf *p);
+u8_t pbuf_free(struct pbuf *p);
+u8_t pbuf_clen(struct pbuf *p);  
+void pbuf_cat(struct pbuf *head, struct pbuf *tail);
+void pbuf_chain(struct pbuf *head, struct pbuf *tail);
+struct pbuf *pbuf_dechain(struct pbuf *p);
+err_t pbuf_copy(struct pbuf *p_to, struct pbuf *p_from);
+u16_t pbuf_copy_partial(struct pbuf *p, void *dataptr, u16_t len, u16_t offset);
+err_t pbuf_take(struct pbuf *buf, const void *dataptr, u16_t len);
+struct pbuf *pbuf_coalesce(struct pbuf *p, pbuf_layer layer);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_PBUF_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/raw.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/raw.h
new file mode 100644
index 000000000..20b0a11bb
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/raw.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_RAW_H__
+#define __LWIP_RAW_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/inet.h"
+#include "lwip/ip.h"
+#include "lwip/ip_addr.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct raw_pcb {
+/* Common members of all PCB types */
+  IP_PCB;
+
+  struct raw_pcb *next;
+
+  u8_t protocol;
+
+  /* receive callback function
+   * @param arg user supplied argument (raw_pcb.recv_arg)
+   * @param pcb the raw_pcb which received data
+   * @param p the packet buffer that was received
+   * @param addr the remote IP address from which the packet was received
+   * @return 1 if the packet was 'eaten' (aka. deleted),
+   *         0 if the packet lives on
+   * If returning 1, the callback is responsible for freeing the pbuf
+   * if it's not used any more.
+   */
+  u8_t (* recv)(void *arg, struct raw_pcb *pcb, struct pbuf *p,
+    struct ip_addr *addr);
+  /* user-supplied argument for the recv callback */
+  void *recv_arg;
+};
+
+/* The following functions is the application layer interface to the
+   RAW code. */
+struct raw_pcb * raw_new        (u8_t proto);
+void             raw_remove     (struct raw_pcb *pcb);
+err_t            raw_bind       (struct raw_pcb *pcb, struct ip_addr *ipaddr);
+err_t            raw_connect    (struct raw_pcb *pcb, struct ip_addr *ipaddr);
+
+void             raw_recv       (struct raw_pcb *pcb,
+                                 u8_t (* recv)(void *arg, struct raw_pcb *pcb,
+                                              struct pbuf *p,
+                                              struct ip_addr *addr),
+                                 void *recv_arg);
+err_t            raw_sendto     (struct raw_pcb *pcb, struct pbuf *p, struct ip_addr *ipaddr);
+err_t            raw_send       (struct raw_pcb *pcb, struct pbuf *p);
+
+/* The following functions are the lower layer interface to RAW. */
+u8_t             raw_input      (struct pbuf *p, struct netif *inp);
+#define raw_init() /* Compatibility define, not init needed. */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_RAW */
+
+#endif /* __LWIP_RAW_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sio.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sio.h
new file mode 100644
index 000000000..7d9162e49
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sio.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ */
+
+/*
+ * This is the interface to the platform specific serial IO module
+ * It needs to be implemented by those platforms which need SLIP or PPP
+ */
+
+#ifndef __SIO_H__
+#define __SIO_H__
+
+#include "lwip/arch.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* If you want to define sio_fd_t elsewhere or differently,
+   define this in your cc.h file. */
+#ifndef __sio_fd_t_defined
+typedef void * sio_fd_t;
+#endif
+
+/* The following functions can be defined to something else in your cc.h file
+   or be implemented in your custom sio.c file. */
+
+#ifndef sio_open
+sio_fd_t sio_open(u8_t);
+#endif
+
+#ifndef sio_send
+void sio_send(u8_t, sio_fd_t);
+#endif
+
+#ifndef sio_recv
+u8_t sio_recv(sio_fd_t);
+#endif
+
+#ifndef sio_read
+u32_t sio_read(sio_fd_t, u8_t *, u32_t);
+#endif
+
+#ifndef sio_write
+u32_t sio_write(sio_fd_t, u8_t *, u32_t);
+#endif
+
+#ifndef sio_read_abort
+void sio_read_abort(sio_fd_t);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __SIO_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp.h
new file mode 100644
index 000000000..dd03d5d70
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp.h
@@ -0,0 +1,364 @@
+/*
+ * Copyright (c) 2001, 2002 Leon Woestenberg <leon.woestenberg@axon.tv>
+ * Copyright (c) 2001, 2002 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Leon Woestenberg <leon.woestenberg@axon.tv>
+ *
+ */
+#ifndef __LWIP_SNMP_H__
+#define __LWIP_SNMP_H__
+
+#include "lwip/opt.h"
+#include "lwip/netif.h"
+#include "lwip/udp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @see RFC1213, "MIB-II, 6. Definitions"
+ */
+enum snmp_ifType {
+  snmp_ifType_other=1,                /* none of the following */
+  snmp_ifType_regular1822,
+  snmp_ifType_hdh1822,
+  snmp_ifType_ddn_x25,
+  snmp_ifType_rfc877_x25,
+  snmp_ifType_ethernet_csmacd,
+  snmp_ifType_iso88023_csmacd,
+  snmp_ifType_iso88024_tokenBus,
+  snmp_ifType_iso88025_tokenRing,
+  snmp_ifType_iso88026_man,
+  snmp_ifType_starLan,
+  snmp_ifType_proteon_10Mbit,
+  snmp_ifType_proteon_80Mbit,
+  snmp_ifType_hyperchannel,
+  snmp_ifType_fddi,
+  snmp_ifType_lapb,
+  snmp_ifType_sdlc,
+  snmp_ifType_ds1,                    /* T-1 */
+  snmp_ifType_e1,                     /* european equiv. of T-1 */
+  snmp_ifType_basicISDN,
+  snmp_ifType_primaryISDN,            /* proprietary serial */
+  snmp_ifType_propPointToPointSerial,
+  snmp_ifType_ppp,
+  snmp_ifType_softwareLoopback,
+  snmp_ifType_eon,                    /* CLNP over IP [11] */
+  snmp_ifType_ethernet_3Mbit,
+  snmp_ifType_nsip,                   /* XNS over IP */
+  snmp_ifType_slip,                   /* generic SLIP */
+  snmp_ifType_ultra,                  /* ULTRA technologies */
+  snmp_ifType_ds3,                    /* T-3 */
+  snmp_ifType_sip,                    /* SMDS */
+  snmp_ifType_frame_relay
+};
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+/** SNMP "sysuptime" Interval */
+#define SNMP_SYSUPTIME_INTERVAL 10
+
+/** fixed maximum length for object identifier type */
+#define LWIP_SNMP_OBJ_ID_LEN 32
+
+/** internal object identifier representation */
+struct snmp_obj_id
+{
+  u8_t len;
+  s32_t id[LWIP_SNMP_OBJ_ID_LEN];
+};
+
+/* system */
+void snmp_set_sysdesr(u8_t* str, u8_t* len);
+void snmp_set_sysobjid(struct snmp_obj_id *oid);
+void snmp_get_sysobjid_ptr(struct snmp_obj_id **oid);
+void snmp_inc_sysuptime(void);
+void snmp_add_sysuptime(u32_t value);
+void snmp_get_sysuptime(u32_t *value);
+void snmp_set_syscontact(u8_t *ocstr, u8_t *ocstrlen);
+void snmp_set_sysname(u8_t *ocstr, u8_t *ocstrlen);
+void snmp_set_syslocation(u8_t *ocstr, u8_t *ocstrlen);
+
+/* network interface */
+void snmp_add_ifinoctets(struct netif *ni, u32_t value); 
+void snmp_inc_ifinucastpkts(struct netif *ni);
+void snmp_inc_ifinnucastpkts(struct netif *ni);
+void snmp_inc_ifindiscards(struct netif *ni);
+void snmp_add_ifoutoctets(struct netif *ni, u32_t value);
+void snmp_inc_ifoutucastpkts(struct netif *ni);
+void snmp_inc_ifoutnucastpkts(struct netif *ni);
+void snmp_inc_ifoutdiscards(struct netif *ni);
+void snmp_inc_iflist(void);
+void snmp_dec_iflist(void);
+
+/* ARP (for atTable and ipNetToMediaTable) */
+void snmp_insert_arpidx_tree(struct netif *ni, struct ip_addr *ip);
+void snmp_delete_arpidx_tree(struct netif *ni, struct ip_addr *ip);
+
+/* IP */
+void snmp_inc_ipinreceives(void);
+void snmp_inc_ipinhdrerrors(void);
+void snmp_inc_ipinaddrerrors(void);
+void snmp_inc_ipforwdatagrams(void);
+void snmp_inc_ipinunknownprotos(void);
+void snmp_inc_ipindiscards(void);
+void snmp_inc_ipindelivers(void);
+void snmp_inc_ipoutrequests(void);
+void snmp_inc_ipoutdiscards(void);
+void snmp_inc_ipoutnoroutes(void);
+void snmp_inc_ipreasmreqds(void);
+void snmp_inc_ipreasmoks(void);
+void snmp_inc_ipreasmfails(void);
+void snmp_inc_ipfragoks(void);
+void snmp_inc_ipfragfails(void);
+void snmp_inc_ipfragcreates(void);
+void snmp_inc_iproutingdiscards(void);
+void snmp_insert_ipaddridx_tree(struct netif *ni);
+void snmp_delete_ipaddridx_tree(struct netif *ni);
+void snmp_insert_iprteidx_tree(u8_t dflt, struct netif *ni);
+void snmp_delete_iprteidx_tree(u8_t dflt, struct netif *ni);
+
+/* ICMP */
+void snmp_inc_icmpinmsgs(void);
+void snmp_inc_icmpinerrors(void);
+void snmp_inc_icmpindestunreachs(void);
+void snmp_inc_icmpintimeexcds(void);
+void snmp_inc_icmpinparmprobs(void);
+void snmp_inc_icmpinsrcquenchs(void);
+void snmp_inc_icmpinredirects(void);
+void snmp_inc_icmpinechos(void);
+void snmp_inc_icmpinechoreps(void);
+void snmp_inc_icmpintimestamps(void);
+void snmp_inc_icmpintimestampreps(void);
+void snmp_inc_icmpinaddrmasks(void);
+void snmp_inc_icmpinaddrmaskreps(void);
+void snmp_inc_icmpoutmsgs(void);
+void snmp_inc_icmpouterrors(void);
+void snmp_inc_icmpoutdestunreachs(void);
+void snmp_inc_icmpouttimeexcds(void);
+void snmp_inc_icmpoutparmprobs(void);
+void snmp_inc_icmpoutsrcquenchs(void);
+void snmp_inc_icmpoutredirects(void); 
+void snmp_inc_icmpoutechos(void);
+void snmp_inc_icmpoutechoreps(void);
+void snmp_inc_icmpouttimestamps(void);
+void snmp_inc_icmpouttimestampreps(void);
+void snmp_inc_icmpoutaddrmasks(void);
+void snmp_inc_icmpoutaddrmaskreps(void);
+
+/* TCP */
+void snmp_inc_tcpactiveopens(void);
+void snmp_inc_tcppassiveopens(void);
+void snmp_inc_tcpattemptfails(void);
+void snmp_inc_tcpestabresets(void);
+void snmp_inc_tcpinsegs(void);
+void snmp_inc_tcpoutsegs(void);
+void snmp_inc_tcpretranssegs(void);
+void snmp_inc_tcpinerrs(void);
+void snmp_inc_tcpoutrsts(void);
+
+/* UDP */
+void snmp_inc_udpindatagrams(void);
+void snmp_inc_udpnoports(void);
+void snmp_inc_udpinerrors(void);
+void snmp_inc_udpoutdatagrams(void);
+void snmp_insert_udpidx_tree(struct udp_pcb *pcb);
+void snmp_delete_udpidx_tree(struct udp_pcb *pcb);
+
+/* SNMP */
+void snmp_inc_snmpinpkts(void);
+void snmp_inc_snmpoutpkts(void);
+void snmp_inc_snmpinbadversions(void);
+void snmp_inc_snmpinbadcommunitynames(void);
+void snmp_inc_snmpinbadcommunityuses(void);
+void snmp_inc_snmpinasnparseerrs(void);
+void snmp_inc_snmpintoobigs(void);
+void snmp_inc_snmpinnosuchnames(void);
+void snmp_inc_snmpinbadvalues(void);
+void snmp_inc_snmpinreadonlys(void);
+void snmp_inc_snmpingenerrs(void);
+void snmp_add_snmpintotalreqvars(u8_t value);
+void snmp_add_snmpintotalsetvars(u8_t value);
+void snmp_inc_snmpingetrequests(void);
+void snmp_inc_snmpingetnexts(void);
+void snmp_inc_snmpinsetrequests(void);
+void snmp_inc_snmpingetresponses(void);
+void snmp_inc_snmpintraps(void);
+void snmp_inc_snmpouttoobigs(void);
+void snmp_inc_snmpoutnosuchnames(void);
+void snmp_inc_snmpoutbadvalues(void);
+void snmp_inc_snmpoutgenerrs(void);
+void snmp_inc_snmpoutgetrequests(void);
+void snmp_inc_snmpoutgetnexts(void);
+void snmp_inc_snmpoutsetrequests(void);
+void snmp_inc_snmpoutgetresponses(void);
+void snmp_inc_snmpouttraps(void);
+void snmp_get_snmpgrpid_ptr(struct snmp_obj_id **oid);
+void snmp_set_snmpenableauthentraps(u8_t *value);
+void snmp_get_snmpenableauthentraps(u8_t *value);
+
+/* LWIP_SNMP support not available */
+/* define everything to be empty */
+#else
+
+/* system */
+#define snmp_set_sysdesr(str, len)
+#define snmp_set_sysobjid(oid);
+#define snmp_get_sysobjid_ptr(oid)
+#define snmp_inc_sysuptime()
+#define snmp_add_sysuptime(value)
+#define snmp_get_sysuptime(value)
+#define snmp_set_syscontact(ocstr, ocstrlen);
+#define snmp_set_sysname(ocstr, ocstrlen);
+#define snmp_set_syslocation(ocstr, ocstrlen);
+
+/* network interface */
+#define snmp_add_ifinoctets(ni,value) 
+#define snmp_inc_ifinucastpkts(ni)
+#define snmp_inc_ifinnucastpkts(ni)
+#define snmp_inc_ifindiscards(ni)
+#define snmp_add_ifoutoctets(ni,value)
+#define snmp_inc_ifoutucastpkts(ni)
+#define snmp_inc_ifoutnucastpkts(ni)
+#define snmp_inc_ifoutdiscards(ni)
+#define snmp_inc_iflist()
+#define snmp_dec_iflist()
+
+/* ARP */
+#define snmp_insert_arpidx_tree(ni,ip)
+#define snmp_delete_arpidx_tree(ni,ip)
+
+/* IP */
+#define snmp_inc_ipinreceives()
+#define snmp_inc_ipinhdrerrors()
+#define snmp_inc_ipinaddrerrors()
+#define snmp_inc_ipforwdatagrams()
+#define snmp_inc_ipinunknownprotos()
+#define snmp_inc_ipindiscards()
+#define snmp_inc_ipindelivers()
+#define snmp_inc_ipoutrequests()
+#define snmp_inc_ipoutdiscards()
+#define snmp_inc_ipoutnoroutes()
+#define snmp_inc_ipreasmreqds()
+#define snmp_inc_ipreasmoks()
+#define snmp_inc_ipreasmfails()
+#define snmp_inc_ipfragoks()
+#define snmp_inc_ipfragfails()
+#define snmp_inc_ipfragcreates()
+#define snmp_inc_iproutingdiscards()
+#define snmp_insert_ipaddridx_tree(ni)
+#define snmp_delete_ipaddridx_tree(ni)
+#define snmp_insert_iprteidx_tree(dflt, ni)
+#define snmp_delete_iprteidx_tree(dflt, ni)
+
+/* ICMP */
+#define snmp_inc_icmpinmsgs()
+#define snmp_inc_icmpinerrors() 
+#define snmp_inc_icmpindestunreachs() 
+#define snmp_inc_icmpintimeexcds()
+#define snmp_inc_icmpinparmprobs() 
+#define snmp_inc_icmpinsrcquenchs() 
+#define snmp_inc_icmpinredirects() 
+#define snmp_inc_icmpinechos() 
+#define snmp_inc_icmpinechoreps()
+#define snmp_inc_icmpintimestamps() 
+#define snmp_inc_icmpintimestampreps()
+#define snmp_inc_icmpinaddrmasks()
+#define snmp_inc_icmpinaddrmaskreps()
+#define snmp_inc_icmpoutmsgs()
+#define snmp_inc_icmpouterrors()
+#define snmp_inc_icmpoutdestunreachs() 
+#define snmp_inc_icmpouttimeexcds() 
+#define snmp_inc_icmpoutparmprobs()
+#define snmp_inc_icmpoutsrcquenchs()
+#define snmp_inc_icmpoutredirects() 
+#define snmp_inc_icmpoutechos() 
+#define snmp_inc_icmpoutechoreps()
+#define snmp_inc_icmpouttimestamps()
+#define snmp_inc_icmpouttimestampreps()
+#define snmp_inc_icmpoutaddrmasks()
+#define snmp_inc_icmpoutaddrmaskreps()
+/* TCP */
+#define snmp_inc_tcpactiveopens()
+#define snmp_inc_tcppassiveopens()
+#define snmp_inc_tcpattemptfails()
+#define snmp_inc_tcpestabresets()
+#define snmp_inc_tcpinsegs()
+#define snmp_inc_tcpoutsegs()
+#define snmp_inc_tcpretranssegs()
+#define snmp_inc_tcpinerrs()
+#define snmp_inc_tcpoutrsts()
+
+/* UDP */
+#define snmp_inc_udpindatagrams()
+#define snmp_inc_udpnoports()
+#define snmp_inc_udpinerrors()
+#define snmp_inc_udpoutdatagrams()
+#define snmp_insert_udpidx_tree(pcb)
+#define snmp_delete_udpidx_tree(pcb)
+
+/* SNMP */
+#define snmp_inc_snmpinpkts()
+#define snmp_inc_snmpoutpkts()
+#define snmp_inc_snmpinbadversions()
+#define snmp_inc_snmpinbadcommunitynames()
+#define snmp_inc_snmpinbadcommunityuses()
+#define snmp_inc_snmpinasnparseerrs()
+#define snmp_inc_snmpintoobigs()
+#define snmp_inc_snmpinnosuchnames()
+#define snmp_inc_snmpinbadvalues()
+#define snmp_inc_snmpinreadonlys()
+#define snmp_inc_snmpingenerrs()
+#define snmp_add_snmpintotalreqvars(value)
+#define snmp_add_snmpintotalsetvars(value)
+#define snmp_inc_snmpingetrequests()
+#define snmp_inc_snmpingetnexts()
+#define snmp_inc_snmpinsetrequests()
+#define snmp_inc_snmpingetresponses()
+#define snmp_inc_snmpintraps()
+#define snmp_inc_snmpouttoobigs()
+#define snmp_inc_snmpoutnosuchnames()
+#define snmp_inc_snmpoutbadvalues()
+#define snmp_inc_snmpoutgenerrs()
+#define snmp_inc_snmpoutgetrequests()
+#define snmp_inc_snmpoutgetnexts()
+#define snmp_inc_snmpoutsetrequests()
+#define snmp_inc_snmpoutgetresponses()
+#define snmp_inc_snmpouttraps()
+#define snmp_get_snmpgrpid_ptr(oid)
+#define snmp_set_snmpenableauthentraps(value)
+#define snmp_get_snmpenableauthentraps(value)
+
+#endif /* LWIP_SNMP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_SNMP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_asn1.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_asn1.h
new file mode 100644
index 000000000..8a602881f
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_asn1.h
@@ -0,0 +1,101 @@
+/**
+ * @file
+ * Abstract Syntax Notation One (ISO 8824, 8825) codec.
+ */
+ 
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#ifndef __LWIP_SNMP_ASN1_H__
+#define __LWIP_SNMP_ASN1_H__
+
+#include "lwip/opt.h"
+#include "lwip/err.h"
+#include "lwip/pbuf.h"
+#include "lwip/snmp.h"
+
+#if LWIP_SNMP
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SNMP_ASN1_UNIV   (!0x80 | !0x40)
+#define SNMP_ASN1_APPLIC (!0x80 |  0x40)
+#define SNMP_ASN1_CONTXT ( 0x80 | !0x40)
+
+#define SNMP_ASN1_CONSTR (0x20)
+#define SNMP_ASN1_PRIMIT (!0x20)
+
+/* universal tags */
+#define SNMP_ASN1_INTEG  2
+#define SNMP_ASN1_OC_STR 4
+#define SNMP_ASN1_NUL    5
+#define SNMP_ASN1_OBJ_ID 6
+#define SNMP_ASN1_SEQ    16
+
+/* application specific (SNMP) tags */
+#define SNMP_ASN1_IPADDR 0    /* octet string size(4) */
+#define SNMP_ASN1_COUNTER 1   /* u32_t */
+#define SNMP_ASN1_GAUGE 2     /* u32_t */
+#define SNMP_ASN1_TIMETICKS 3 /* u32_t */
+#define SNMP_ASN1_OPAQUE 4    /* octet string */
+
+/* context specific (SNMP) tags */
+#define SNMP_ASN1_PDU_GET_REQ 0
+#define SNMP_ASN1_PDU_GET_NEXT_REQ 1
+#define SNMP_ASN1_PDU_GET_RESP 2
+#define SNMP_ASN1_PDU_SET_REQ 3
+#define SNMP_ASN1_PDU_TRAP 4
+
+err_t snmp_asn1_dec_type(struct pbuf *p, u16_t ofs, u8_t *type);
+err_t snmp_asn1_dec_length(struct pbuf *p, u16_t ofs, u8_t *octets_used, u16_t *length);
+err_t snmp_asn1_dec_u32t(struct pbuf *p, u16_t ofs, u16_t len, u32_t *value);
+err_t snmp_asn1_dec_s32t(struct pbuf *p, u16_t ofs, u16_t len, s32_t *value);
+err_t snmp_asn1_dec_oid(struct pbuf *p, u16_t ofs, u16_t len, struct snmp_obj_id *oid);
+err_t snmp_asn1_dec_raw(struct pbuf *p, u16_t ofs, u16_t len, u16_t raw_len, u8_t *raw);
+
+void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed);
+void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed);
+void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed);
+void snmp_asn1_enc_oid_cnt(u8_t ident_len, s32_t *ident, u16_t *octets_needed);
+err_t snmp_asn1_enc_type(struct pbuf *p, u16_t ofs, u8_t type);
+err_t snmp_asn1_enc_length(struct pbuf *p, u16_t ofs, u16_t length);
+err_t snmp_asn1_enc_u32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, u32_t value);
+err_t snmp_asn1_enc_s32t(struct pbuf *p, u16_t ofs, u8_t octets_needed, s32_t value);
+err_t snmp_asn1_enc_oid(struct pbuf *p, u16_t ofs, u8_t ident_len, s32_t *ident);
+err_t snmp_asn1_enc_raw(struct pbuf *p, u16_t ofs, u8_t raw_len, u8_t *raw);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_SNMP */
+
+#endif /* __LWIP_SNMP_ASN1_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_msg.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_msg.h
new file mode 100644
index 000000000..b2f69c4be
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_msg.h
@@ -0,0 +1,311 @@
+/**
+ * @file
+ * SNMP Agent message handling structures.
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#ifndef __LWIP_SNMP_MSG_H__
+#define __LWIP_SNMP_MSG_H__
+
+#include "lwip/opt.h"
+#include "lwip/snmp.h"
+#include "lwip/snmp_structs.h"
+
+#if LWIP_SNMP
+
+#if SNMP_PRIVATE_MIB
+#include "private_mib.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* The listen port of the SNMP agent. Clients have to make their requests to
+   this port. Most standard clients won't work if you change this! */
+#ifndef SNMP_IN_PORT
+#define SNMP_IN_PORT 161
+#endif
+/* The remote port the SNMP agent sends traps to. Most standard trap sinks won't
+   work if you change this! */
+#ifndef SNMP_TRAP_PORT
+#define SNMP_TRAP_PORT 162
+#endif
+
+#define SNMP_ES_NOERROR 0
+#define SNMP_ES_TOOBIG 1
+#define SNMP_ES_NOSUCHNAME 2
+#define SNMP_ES_BADVALUE 3
+#define SNMP_ES_READONLY 4
+#define SNMP_ES_GENERROR 5
+
+#define SNMP_GENTRAP_COLDSTART 0
+#define SNMP_GENTRAP_WARMSTART 1
+#define SNMP_GENTRAP_AUTHFAIL 4
+#define SNMP_GENTRAP_ENTERPRISESPC 6
+
+struct snmp_varbind
+{
+  /* next pointer, NULL for last in list */
+  struct snmp_varbind *next;
+  /* previous pointer, NULL for first in list */
+  struct snmp_varbind *prev;
+
+  /* object identifier length (in s32_t) */
+  u8_t ident_len;
+  /* object identifier array */
+  s32_t *ident;
+
+  /* object value ASN1 type */
+  u8_t value_type;
+  /* object value length (in u8_t) */
+  u8_t value_len;
+  /* object value */
+  void *value;
+
+  /* encoding varbind seq length length */
+  u8_t seqlenlen;
+  /* encoding object identifier length length */
+  u8_t olenlen;
+  /* encoding object value length length */
+  u8_t vlenlen;
+  /* encoding varbind seq length */
+  u16_t seqlen;
+  /* encoding object identifier length */
+  u16_t olen;
+  /* encoding object value length */
+  u16_t vlen;
+};
+
+struct snmp_varbind_root
+{
+  struct snmp_varbind *head;
+  struct snmp_varbind *tail;
+  /* number of variable bindings in list */
+  u8_t count;
+  /* encoding varbind-list seq length length */
+  u8_t seqlenlen;
+  /* encoding varbind-list seq length */
+  u16_t seqlen;
+};
+
+/** output response message header length fields */
+struct snmp_resp_header_lengths
+{
+  /* encoding error-index length length */
+  u8_t erridxlenlen;
+  /* encoding error-status length length */
+  u8_t errstatlenlen;
+  /* encoding request id length length */
+  u8_t ridlenlen;
+  /* encoding pdu length length */
+  u8_t pdulenlen;
+  /* encoding community length length */
+  u8_t comlenlen;
+  /* encoding version length length */
+  u8_t verlenlen;
+  /* encoding sequence length length */
+  u8_t seqlenlen;
+
+  /* encoding error-index length */
+  u16_t erridxlen;
+  /* encoding error-status length */
+  u16_t errstatlen;
+  /* encoding request id length */
+  u16_t ridlen;
+  /* encoding pdu length */
+  u16_t pdulen;
+  /* encoding community length */
+  u16_t comlen;
+  /* encoding version length */
+  u16_t verlen;
+  /* encoding sequence length */
+  u16_t seqlen;
+};
+
+/** output response message header length fields */
+struct snmp_trap_header_lengths
+{
+  /* encoding timestamp length length */
+  u8_t tslenlen;
+  /* encoding specific-trap length length */
+  u8_t strplenlen;
+  /* encoding generic-trap length length */
+  u8_t gtrplenlen;
+  /* encoding agent-addr length length */
+  u8_t aaddrlenlen;
+  /* encoding enterprise-id length length */
+  u8_t eidlenlen;
+  /* encoding pdu length length */
+  u8_t pdulenlen;
+  /* encoding community length length */
+  u8_t comlenlen;
+  /* encoding version length length */
+  u8_t verlenlen;
+  /* encoding sequence length length */
+  u8_t seqlenlen;
+
+  /* encoding timestamp length */
+  u16_t tslen;
+  /* encoding specific-trap length */
+  u16_t strplen;
+  /* encoding generic-trap length */
+  u16_t gtrplen;
+  /* encoding agent-addr length */
+  u16_t aaddrlen;
+  /* encoding enterprise-id length */
+  u16_t eidlen;
+  /* encoding pdu length */
+  u16_t pdulen;
+  /* encoding community length */
+  u16_t comlen;
+  /* encoding version length */
+  u16_t verlen;
+  /* encoding sequence length */
+  u16_t seqlen;
+};
+
+/* Accepting new SNMP messages. */
+#define SNMP_MSG_EMPTY                 0
+/* Search for matching object for variable binding. */
+#define SNMP_MSG_SEARCH_OBJ            1
+/* Perform SNMP operation on in-memory object.
+   Pass-through states, for symmetry only. */
+#define SNMP_MSG_INTERNAL_GET_OBJDEF   2
+#define SNMP_MSG_INTERNAL_GET_VALUE    3
+#define SNMP_MSG_INTERNAL_SET_TEST     4
+#define SNMP_MSG_INTERNAL_GET_OBJDEF_S 5
+#define SNMP_MSG_INTERNAL_SET_VALUE    6
+/* Perform SNMP operation on object located externally.
+   In theory this could be used for building a proxy agent.
+   Practical use is for an enterprise spc. app. gateway. */
+#define SNMP_MSG_EXTERNAL_GET_OBJDEF   7
+#define SNMP_MSG_EXTERNAL_GET_VALUE    8
+#define SNMP_MSG_EXTERNAL_SET_TEST     9
+#define SNMP_MSG_EXTERNAL_GET_OBJDEF_S 10
+#define SNMP_MSG_EXTERNAL_SET_VALUE    11
+
+#define SNMP_COMMUNITY_STR_LEN 64
+struct snmp_msg_pstat
+{
+  /* lwIP local port (161) binding */
+  struct udp_pcb *pcb;
+  /* source IP address */
+  struct ip_addr sip;
+  /* source UDP port */
+  u16_t sp;
+  /* request type */
+  u8_t rt;
+  /* request ID */
+  s32_t rid;
+  /* error status */
+  s32_t error_status;
+  /* error index */
+  s32_t error_index;
+  /* community name (zero terminated) */
+  u8_t community[SNMP_COMMUNITY_STR_LEN + 1];
+  /* community string length (exclusive zero term) */
+  u8_t com_strlen;
+  /* one out of MSG_EMPTY, MSG_DEMUX, MSG_INTERNAL, MSG_EXTERNAL_x */
+  u8_t state;
+  /* saved arguments for MSG_EXTERNAL_x */
+  struct mib_external_node *ext_mib_node;
+  struct snmp_name_ptr ext_name_ptr;
+  struct obj_def ext_object_def;
+  struct snmp_obj_id ext_oid;
+  /* index into input variable binding list */
+  u8_t vb_idx;
+  /* ptr into input variable binding list */
+  struct snmp_varbind *vb_ptr;
+  /* list of variable bindings from input */
+  struct snmp_varbind_root invb;
+  /* list of variable bindings to output */
+  struct snmp_varbind_root outvb;
+  /* output response lengths used in ASN encoding */
+  struct snmp_resp_header_lengths rhl;
+};
+
+struct snmp_msg_trap
+{
+  /* lwIP local port (161) binding */
+  struct udp_pcb *pcb;
+  /* destination IP address in network order */
+  struct ip_addr dip;
+
+  /* source enterprise ID (sysObjectID) */
+  struct snmp_obj_id *enterprise;
+  /* source IP address, raw network order format */
+  u8_t sip_raw[4];
+  /* generic trap code */
+  u32_t gen_trap;
+  /* specific trap code */
+  u32_t spc_trap;
+  /* timestamp */
+  u32_t ts;
+  /* list of variable bindings to output */
+  struct snmp_varbind_root outvb;
+  /* output trap lengths used in ASN encoding */
+  struct snmp_trap_header_lengths thl;
+};
+
+/** Agent Version constant, 0 = v1 oddity */
+extern const s32_t snmp_version;
+/** Agent default "public" community string */
+extern const char snmp_publiccommunity[7];
+
+extern struct snmp_msg_trap trap_msg;
+
+/** Agent setup, start listening to port 161. */
+void snmp_init(void);
+void snmp_trap_dst_enable(u8_t dst_idx, u8_t enable);
+void snmp_trap_dst_ip_set(u8_t dst_idx, struct ip_addr *dst);
+
+/** Varbind-list functions. */
+struct snmp_varbind* snmp_varbind_alloc(struct snmp_obj_id *oid, u8_t type, u8_t len);
+void snmp_varbind_free(struct snmp_varbind *vb);
+void snmp_varbind_list_free(struct snmp_varbind_root *root);
+void snmp_varbind_tail_add(struct snmp_varbind_root *root, struct snmp_varbind *vb);
+struct snmp_varbind* snmp_varbind_tail_remove(struct snmp_varbind_root *root);
+
+/** Handle an internal (recv) or external (private response) event. */
+void snmp_msg_event(u8_t request_id);
+err_t snmp_send_response(struct snmp_msg_pstat *m_stat);
+err_t snmp_send_trap(s8_t generic_trap, struct snmp_obj_id *eoid, s32_t specific_trap);
+void snmp_coldstart_trap(void);
+void snmp_authfail_trap(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_SNMP */
+
+#endif /* __LWIP_SNMP_MSG_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_structs.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_structs.h
new file mode 100644
index 000000000..9f3f8a94e
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/snmp_structs.h
@@ -0,0 +1,262 @@
+/**
+ * @file
+ * Generic MIB tree structures.
+ *
+ * @todo namespace prefixes
+ */
+
+/*
+ * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * Author: Christiaan Simons <christiaan.simons@axon.tv>
+ */
+
+#ifndef __LWIP_SNMP_STRUCTS_H__
+#define __LWIP_SNMP_STRUCTS_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/snmp.h"
+
+#if SNMP_PRIVATE_MIB
+#include "private_mib.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* MIB object instance */
+#define MIB_OBJECT_NONE 0 
+#define MIB_OBJECT_SCALAR 1
+#define MIB_OBJECT_TAB 2
+
+/* MIB object access */
+#define MIB_OBJECT_READ_ONLY 0
+#define MIB_OBJECT_READ_WRITE 1
+#define MIB_OBJECT_WRITE_ONLY 2
+#define MIB_OBJECT_NOT_ACCESSIBLE 3
+
+/** object definition returned by (get_object_def)() */
+struct obj_def
+{
+  /* MIB_OBJECT_NONE (0), MIB_OBJECT_SCALAR (1), MIB_OBJECT_TAB (2) */
+  u8_t instance;
+  /* 0 read-only, 1 read-write, 2 write-only, 3 not-accessible */
+  u8_t access;
+  /* ASN type for this object */
+  u8_t asn_type;
+  /* value length (host length) */
+  u16_t v_len;
+  /* length of instance part of supplied object identifier */
+  u8_t  id_inst_len;
+  /* instance part of supplied object identifier */
+  s32_t *id_inst_ptr;
+};
+
+struct snmp_name_ptr
+{
+  u8_t ident_len;
+  s32_t *ident;
+};
+
+/** MIB const scalar (.0) node */
+#define MIB_NODE_SC 0x01
+/** MIB const array node */
+#define MIB_NODE_AR 0x02
+/** MIB array node (mem_malloced from RAM) */
+#define MIB_NODE_RA 0x03
+/** MIB list root node (mem_malloced from RAM) */
+#define MIB_NODE_LR 0x04
+/** MIB node for external objects */
+#define MIB_NODE_EX 0x05
+
+/** node "base class" layout, the mandatory fields for a node  */
+struct mib_node
+{
+  /** returns struct obj_def for the given object identifier */
+  void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
+  /** returns object value for the given object identifier,
+     @note the caller must allocate at least len bytes for the value */
+  void (*get_value)(struct obj_def *od, u16_t len, void *value);
+  /** tests length and/or range BEFORE setting */
+  u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
+  /** sets object value, only to be called when set_test()  */
+  void (*set_value)(struct obj_def *od, u16_t len, void *value);  
+  /** One out of MIB_NODE_AR, MIB_NODE_LR or MIB_NODE_EX */
+  const u8_t node_type;
+  /* array or max list length */
+  const u16_t maxlength;
+};
+
+/** derived node for scalars .0 index */
+typedef struct mib_node mib_scalar_node;
+
+/** derived node, points to a fixed size const array
+    of sub-identifiers plus a 'child' pointer */
+struct mib_array_node
+{
+  /* inherited "base class" members */
+  void (* const get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
+  void (* const get_value)(struct obj_def *od, u16_t len, void *value);
+  u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
+  void (*set_value)(struct obj_def *od, u16_t len, void *value);
+
+  const u8_t node_type;
+  const u16_t maxlength;
+
+  /* aditional struct members */
+  const s32_t *objid;
+  struct mib_node* const *nptr;
+};
+
+/** derived node, points to a fixed size mem_malloced array
+    of sub-identifiers plus a 'child' pointer */
+struct mib_ram_array_node
+{
+  /* inherited "base class" members */
+  void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
+  void (*get_value)(struct obj_def *od, u16_t len, void *value);
+  u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
+  void (*set_value)(struct obj_def *od, u16_t len, void *value);
+
+  u8_t node_type;
+  u16_t maxlength;
+
+  /* aditional struct members */
+  s32_t *objid;
+  struct mib_node **nptr;
+};
+
+struct mib_list_node
+{
+  struct mib_list_node *prev;  
+  struct mib_list_node *next;
+  s32_t objid;
+  struct mib_node *nptr;
+};
+
+/** derived node, points to a doubly linked list
+    of sub-identifiers plus a 'child' pointer */
+struct mib_list_rootnode
+{
+  /* inherited "base class" members */
+  void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
+  void (*get_value)(struct obj_def *od, u16_t len, void *value);
+  u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
+  void (*set_value)(struct obj_def *od, u16_t len, void *value);
+
+  u8_t node_type;
+  u16_t maxlength;
+
+  /* aditional struct members */
+  struct mib_list_node *head;
+  struct mib_list_node *tail;
+  /* counts list nodes in list  */
+  u16_t count;
+};
+
+/** derived node, has access functions for mib object in external memory or device
+    using 'tree_level' and 'idx', with a range 0 .. (level_length() - 1) */
+struct mib_external_node
+{
+  /* inherited "base class" members */
+  void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
+  void (*get_value)(struct obj_def *od, u16_t len, void *value);
+  u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
+  void (*set_value)(struct obj_def *od, u16_t len, void *value);
+
+  u8_t node_type;
+  u16_t maxlength;
+
+  /* aditional struct members */
+  /** points to an extenal (in memory) record of some sort of addressing
+      information, passed to and interpreted by the funtions below */
+  void* addr_inf;
+  /** tree levels under this node */
+  u8_t tree_levels;
+  /** number of objects at this level */
+  u16_t (*level_length)(void* addr_inf, u8_t level);
+  /** compares object sub identifier with external id
+      return zero when equal, nonzero when unequal */
+  s32_t (*ident_cmp)(void* addr_inf, u8_t level, u16_t idx, s32_t sub_id);
+  void (*get_objid)(void* addr_inf, u8_t level, u16_t idx, s32_t *sub_id);
+
+  /** async Questions */
+  void (*get_object_def_q)(void* addr_inf, u8_t rid, u8_t ident_len, s32_t *ident);
+  void (*get_value_q)(u8_t rid, struct obj_def *od);
+  void (*set_test_q)(u8_t rid, struct obj_def *od);
+  void (*set_value_q)(u8_t rid, struct obj_def *od, u16_t len, void *value);
+  /** async Answers */
+  void (*get_object_def_a)(u8_t rid, u8_t ident_len, s32_t *ident, struct obj_def *od);
+  void (*get_value_a)(u8_t rid, struct obj_def *od, u16_t len, void *value);
+  u8_t (*set_test_a)(u8_t rid, struct obj_def *od, u16_t len, void *value);
+  void (*set_value_a)(u8_t rid, struct obj_def *od, u16_t len, void *value);
+  /** async Panic Close (agent returns error reply, 
+      e.g. used for external transaction cleanup) */
+  void (*get_object_def_pc)(u8_t rid, u8_t ident_len, s32_t *ident);
+  void (*get_value_pc)(u8_t rid, struct obj_def *od);
+  void (*set_test_pc)(u8_t rid, struct obj_def *od);
+  void (*set_value_pc)(u8_t rid, struct obj_def *od);
+};
+
+/** export MIB tree from mib2.c */
+extern const struct mib_array_node internet;
+
+/** dummy function pointers for non-leaf MIB nodes from mib2.c */
+void noleafs_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
+void noleafs_get_value(struct obj_def *od, u16_t len, void *value);
+u8_t noleafs_set_test(struct obj_def *od, u16_t len, void *value);
+void noleafs_set_value(struct obj_def *od, u16_t len, void *value);
+
+void snmp_oidtoip(s32_t *ident, struct ip_addr *ip);
+void snmp_iptooid(struct ip_addr *ip, s32_t *ident);
+void snmp_ifindextonetif(s32_t ifindex, struct netif **netif);
+void snmp_netiftoifindex(struct netif *netif, s32_t *ifidx);
+
+struct mib_list_node* snmp_mib_ln_alloc(s32_t id);
+void snmp_mib_ln_free(struct mib_list_node *ln);
+struct mib_list_rootnode* snmp_mib_lrn_alloc(void);
+void snmp_mib_lrn_free(struct mib_list_rootnode *lrn);
+
+s8_t snmp_mib_node_insert(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **insn);
+s8_t snmp_mib_node_find(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **fn);
+struct mib_list_rootnode *snmp_mib_node_delete(struct mib_list_rootnode *rn, struct mib_list_node *n);
+
+struct mib_node* snmp_search_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_name_ptr *np);
+struct mib_node* snmp_expand_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret);
+u8_t snmp_iso_prefix_tst(u8_t ident_len, s32_t *ident);
+u8_t snmp_iso_prefix_expand(u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_SNMP */
+
+#endif /* __LWIP_SNMP_STRUCTS_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sockets.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sockets.h
new file mode 100644
index 000000000..7b52e151c
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sockets.h
@@ -0,0 +1,357 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+
+#ifndef __LWIP_SOCKETS_H__
+#define __LWIP_SOCKETS_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */
+
+#include <stddef.h> /* for size_t */
+
+#include "lwip/ip_addr.h"
+#include "lwip/inet.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* members are in network byte order */
+struct sockaddr_in {
+  u8_t sin_len;
+  u8_t sin_family;
+  u16_t sin_port;
+  struct in_addr sin_addr;
+  char sin_zero[8];
+};
+
+struct sockaddr {
+  u8_t sa_len;
+  u8_t sa_family;
+  char sa_data[14];
+};
+
+#ifndef socklen_t
+#  define socklen_t u32_t
+#endif
+
+/* Socket protocol types (TCP/UDP/RAW) */
+#define SOCK_STREAM     1
+#define SOCK_DGRAM      2
+#define SOCK_RAW        3
+
+/*
+ * Option flags per-socket. These must match the SOF_ flags in ip.h!
+ */
+#define  SO_DEBUG       0x0001 /* Unimplemented: turn on debugging info recording */
+#define  SO_ACCEPTCONN  0x0002 /* socket has had listen() */
+#define  SO_REUSEADDR   0x0004 /* Unimplemented: allow local address reuse */
+#define  SO_KEEPALIVE   0x0008 /* keep connections alive */
+#define  SO_DONTROUTE   0x0010 /* Unimplemented: just use interface addresses */
+#define  SO_BROADCAST   0x0020 /* permit to send and to receive broadcast messages (see IP_SOF_BROADCAST option) */
+#define  SO_USELOOPBACK 0x0040 /* Unimplemented: bypass hardware when possible */
+#define  SO_LINGER      0x0080 /* linger on close if data present */
+#define  SO_OOBINLINE   0x0100 /* Unimplemented: leave received OOB data in line */
+#define  SO_REUSEPORT   0x0200 /* Unimplemented: allow local address & port reuse */
+
+#define SO_DONTLINGER   ((int)(~SO_LINGER))
+
+/*
+ * Additional options, not kept in so_options.
+ */
+#define SO_SNDBUF    0x1001    /* Unimplemented: send buffer size */
+#define SO_RCVBUF    0x1002    /* receive buffer size */
+#define SO_SNDLOWAT  0x1003    /* Unimplemented: send low-water mark */
+#define SO_RCVLOWAT  0x1004    /* Unimplemented: receive low-water mark */
+#define SO_SNDTIMEO  0x1005    /* Unimplemented: send timeout */
+#define SO_RCVTIMEO  0x1006    /* receive timeout */
+#define SO_ERROR     0x1007    /* get error status and clear */
+#define SO_TYPE      0x1008    /* get socket type */
+#define SO_CONTIMEO  0x1009    /* Unimplemented: connect timeout */
+#define SO_NO_CHECK  0x100a    /* don't create UDP checksum */
+
+
+/*
+ * Structure used for manipulating linger option.
+ */
+struct linger {
+       int l_onoff;                /* option on/off */
+       int l_linger;               /* linger time */
+};
+
+/*
+ * Level number for (get/set)sockopt() to apply to socket itself.
+ */
+#define  SOL_SOCKET  0xfff    /* options for socket level */
+
+
+#define AF_UNSPEC       0
+#define AF_INET         2
+#define PF_INET         AF_INET
+#define PF_UNSPEC       AF_UNSPEC
+
+#define IPPROTO_IP      0
+#define IPPROTO_TCP     6
+#define IPPROTO_UDP     17
+#define IPPROTO_UDPLITE 136
+
+/* Flags we can use with send and recv. */
+#define MSG_PEEK       0x01    /* Peeks at an incoming message */
+#define MSG_WAITALL    0x02    /* Unimplemented: Requests that the function block until the full amount of data requested can be returned */
+#define MSG_OOB        0x04    /* Unimplemented: Requests out-of-band data. The significance and semantics of out-of-band data are protocol-specific */
+#define MSG_DONTWAIT   0x08    /* Nonblocking i/o for this operation only */
+#define MSG_MORE       0x10    /* Sender will send more */
+
+
+/*
+ * Options for level IPPROTO_IP
+ */
+#define IP_TOS             1
+#define IP_TTL             2
+
+#if LWIP_TCP
+/*
+ * Options for level IPPROTO_TCP
+ */
+#define TCP_NODELAY    0x01    /* don't delay send to coalesce packets */
+#define TCP_KEEPALIVE  0x02    /* send KEEPALIVE probes when idle for pcb->keep_idle milliseconds */
+#define TCP_KEEPIDLE   0x03    /* set pcb->keep_idle  - Same as TCP_KEEPALIVE, but use seconds for get/setsockopt */
+#define TCP_KEEPINTVL  0x04    /* set pcb->keep_intvl - Use seconds for get/setsockopt */
+#define TCP_KEEPCNT    0x05    /* set pcb->keep_cnt   - Use number of probes sent for get/setsockopt */
+#endif /* LWIP_TCP */
+
+#if LWIP_UDP && LWIP_UDPLITE
+/*
+ * Options for level IPPROTO_UDPLITE
+ */
+#define UDPLITE_SEND_CSCOV 0x01 /* sender checksum coverage */
+#define UDPLITE_RECV_CSCOV 0x02 /* minimal receiver checksum coverage */
+#endif /* LWIP_UDP && LWIP_UDPLITE*/
+
+
+#if LWIP_IGMP
+/*
+ * Options and types for UDP multicast traffic handling
+ */
+#define IP_ADD_MEMBERSHIP  3
+#define IP_DROP_MEMBERSHIP 4
+#define IP_MULTICAST_TTL   5
+#define IP_MULTICAST_IF    6
+#define IP_MULTICAST_LOOP  7
+
+typedef struct ip_mreq {
+    struct in_addr imr_multiaddr; /* IP multicast address of group */
+    struct in_addr imr_interface; /* local IP address of interface */
+} ip_mreq;
+#endif /* LWIP_IGMP */
+
+/*
+ * The Type of Service provides an indication of the abstract
+ * parameters of the quality of service desired.  These parameters are
+ * to be used to guide the selection of the actual service parameters
+ * when transmitting a datagram through a particular network.  Several
+ * networks offer service precedence, which somehow treats high
+ * precedence traffic as more important than other traffic (generally
+ * by accepting only traffic above a certain precedence at time of high
+ * load).  The major choice is a three way tradeoff between low-delay,
+ * high-reliability, and high-throughput.
+ * The use of the Delay, Throughput, and Reliability indications may
+ * increase the cost (in some sense) of the service.  In many networks
+ * better performance for one of these parameters is coupled with worse
+ * performance on another.  Except for very unusual cases at most two
+ * of these three indications should be set.
+ */
+#define IPTOS_TOS_MASK          0x1E
+#define IPTOS_TOS(tos)          ((tos) & IPTOS_TOS_MASK)
+#define IPTOS_LOWDELAY          0x10
+#define IPTOS_THROUGHPUT        0x08
+#define IPTOS_RELIABILITY       0x04
+#define IPTOS_LOWCOST           0x02
+#define IPTOS_MINCOST           IPTOS_LOWCOST
+
+/*
+ * The Network Control precedence designation is intended to be used
+ * within a network only.  The actual use and control of that
+ * designation is up to each network. The Internetwork Control
+ * designation is intended for use by gateway control originators only.
+ * If the actual use of these precedence designations is of concern to
+ * a particular network, it is the responsibility of that network to
+ * control the access to, and use of, those precedence designations.
+ */
+#define IPTOS_PREC_MASK                 0xe0
+#define IPTOS_PREC(tos)                ((tos) & IPTOS_PREC_MASK)
+#define IPTOS_PREC_NETCONTROL           0xe0
+#define IPTOS_PREC_INTERNETCONTROL      0xc0
+#define IPTOS_PREC_CRITIC_ECP           0xa0
+#define IPTOS_PREC_FLASHOVERRIDE        0x80
+#define IPTOS_PREC_FLASH                0x60
+#define IPTOS_PREC_IMMEDIATE            0x40
+#define IPTOS_PREC_PRIORITY             0x20
+#define IPTOS_PREC_ROUTINE              0x00
+
+
+/*
+ * Commands for ioctlsocket(),  taken from the BSD file fcntl.h.
+ * lwip_ioctl only supports FIONREAD and FIONBIO, for now
+ *
+ * Ioctl's have the command encoded in the lower word,
+ * and the size of any in or out parameters in the upper
+ * word.  The high 2 bits of the upper word are used
+ * to encode the in/out status of the parameter; for now
+ * we restrict parameters to at most 128 bytes.
+ */
+#if !defined(FIONREAD) || !defined(FIONBIO)
+#define IOCPARM_MASK    0x7fU           /* parameters must be < 128 bytes */
+#define IOC_VOID        0x20000000UL    /* no parameters */
+#define IOC_OUT         0x40000000UL    /* copy out parameters */
+#define IOC_IN          0x80000000UL    /* copy in parameters */
+#define IOC_INOUT       (IOC_IN|IOC_OUT)
+                                        /* 0x20000000 distinguishes new &
+                                           old ioctl's */
+#define _IO(x,y)        (IOC_VOID|((x)<<8)|(y))
+
+#define _IOR(x,y,t)     (IOC_OUT|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))
+
+#define _IOW(x,y,t)     (IOC_IN|(((long)sizeof(t)&IOCPARM_MASK)<<16)|((x)<<8)|(y))
+#endif /* !defined(FIONREAD) || !defined(FIONBIO) */
+
+#ifndef FIONREAD
+#define FIONREAD    _IOR('f', 127, unsigned long) /* get # bytes to read */
+#endif
+#ifndef FIONBIO
+#define FIONBIO     _IOW('f', 126, unsigned long) /* set/clear non-blocking i/o */
+#endif
+
+/* Socket I/O Controls: unimplemented */
+#ifndef SIOCSHIWAT
+#define SIOCSHIWAT  _IOW('s',  0, unsigned long)  /* set high watermark */
+#define SIOCGHIWAT  _IOR('s',  1, unsigned long)  /* get high watermark */
+#define SIOCSLOWAT  _IOW('s',  2, unsigned long)  /* set low watermark */
+#define SIOCGLOWAT  _IOR('s',  3, unsigned long)  /* get low watermark */
+#define SIOCATMARK  _IOR('s',  7, unsigned long)  /* at oob mark? */
+#endif
+
+/* Socket flags: */
+#ifndef O_NONBLOCK
+#define O_NONBLOCK    04000U
+#endif
+
+/* FD_SET used for lwip_select */
+#ifndef FD_SET
+  #undef  FD_SETSIZE
+  /* Make FD_SETSIZE match NUM_SOCKETS in socket.c */
+  #define FD_SETSIZE    MEMP_NUM_NETCONN
+  #define FD_SET(n, p)  ((p)->fd_bits[(n)/8] |=  (1 << ((n) & 7)))
+  #define FD_CLR(n, p)  ((p)->fd_bits[(n)/8] &= ~(1 << ((n) & 7)))
+  #define FD_ISSET(n,p) ((p)->fd_bits[(n)/8] &   (1 << ((n) & 7)))
+  #define FD_ZERO(p)    memset((void*)(p),0,sizeof(*(p)))
+
+  typedef struct fd_set {
+          unsigned char fd_bits [(FD_SETSIZE+7)/8];
+        } fd_set;
+
+#endif /* FD_SET */
+
+/** LWIP_TIMEVAL_PRIVATE: if you want to use the struct timeval provided
+ * by your system, set this to 0 and include <sys/time.h> in cc.h */ 
+#ifndef LWIP_TIMEVAL_PRIVATE
+#define LWIP_TIMEVAL_PRIVATE 1
+#endif
+
+#if LWIP_TIMEVAL_PRIVATE
+struct timeval {
+  long    tv_sec;         /* seconds */
+  long    tv_usec;        /* and microseconds */
+};
+#endif /* LWIP_TIMEVAL_PRIVATE */
+
+void lwip_socket_init(void);
+
+int lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen);
+int lwip_bind(int s, const struct sockaddr *name, socklen_t namelen);
+int lwip_shutdown(int s, int how);
+int lwip_getpeername (int s, struct sockaddr *name, socklen_t *namelen);
+int lwip_getsockname (int s, struct sockaddr *name, socklen_t *namelen);
+int lwip_getsockopt (int s, int level, int optname, void *optval, socklen_t *optlen);
+int lwip_setsockopt (int s, int level, int optname, const void *optval, socklen_t optlen);
+int lwip_close(int s);
+int lwip_connect(int s, const struct sockaddr *name, socklen_t namelen);
+int lwip_listen(int s, int backlog);
+int lwip_recv(int s, void *mem, size_t len, int flags);
+int lwip_read(int s, void *mem, size_t len);
+int lwip_recvfrom(int s, void *mem, size_t len, int flags,
+      struct sockaddr *from, socklen_t *fromlen);
+int lwip_send(int s, const void *dataptr, size_t size, int flags);
+int lwip_sendto(int s, const void *dataptr, size_t size, int flags,
+    const struct sockaddr *to, socklen_t tolen);
+int lwip_socket(int domain, int type, int protocol);
+int lwip_write(int s, const void *dataptr, size_t size);
+int lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset,
+                struct timeval *timeout);
+int lwip_ioctl(int s, long cmd, void *argp);
+
+#if LWIP_COMPAT_SOCKETS
+#define accept(a,b,c)         lwip_accept(a,b,c)
+#define bind(a,b,c)           lwip_bind(a,b,c)
+#define shutdown(a,b)         lwip_shutdown(a,b)
+#define closesocket(s)        lwip_close(s)
+#define connect(a,b,c)        lwip_connect(a,b,c)
+#define getsockname(a,b,c)    lwip_getsockname(a,b,c)
+#define getpeername(a,b,c)    lwip_getpeername(a,b,c)
+#define setsockopt(a,b,c,d,e) lwip_setsockopt(a,b,c,d,e)
+#define getsockopt(a,b,c,d,e) lwip_getsockopt(a,b,c,d,e)
+#define listen(a,b)           lwip_listen(a,b)
+#define recv(a,b,c,d)         lwip_recv(a,b,c,d)
+#define recvfrom(a,b,c,d,e,f) lwip_recvfrom(a,b,c,d,e,f)
+#define send(a,b,c,d)         lwip_send(a,b,c,d)
+#define sendto(a,b,c,d,e,f)   lwip_sendto(a,b,c,d,e,f)
+#define socket(a,b,c)         lwip_socket(a,b,c)
+#define select(a,b,c,d,e)     lwip_select(a,b,c,d,e)
+#define ioctlsocket(a,b,c)    lwip_ioctl(a,b,c)
+
+#if LWIP_POSIX_SOCKETS_IO_NAMES
+#define read(a,b,c)           lwip_read(a,b,c)
+#define write(a,b,c)          lwip_write(a,b,c)
+#define close(s)              lwip_close(s)
+#endif /* LWIP_POSIX_SOCKETS_IO_NAMES */
+
+#endif /* LWIP_COMPAT_SOCKETS */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_SOCKET */
+
+#endif /* __LWIP_SOCKETS_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/stats.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/stats.h
new file mode 100644
index 000000000..aa179f5c0
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/stats.h
@@ -0,0 +1,283 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_STATS_H__
+#define __LWIP_STATS_H__
+
+#include "lwip/opt.h"
+
+#include "lwip/mem.h"
+#include "lwip/memp.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_STATS
+
+#ifndef LWIP_STATS_LARGE
+#define LWIP_STATS_LARGE 0
+#endif
+
+#if LWIP_STATS_LARGE
+#define STAT_COUNTER     u32_t
+#define STAT_COUNTER_F   U32_F
+#else
+#define STAT_COUNTER     u16_t
+#define STAT_COUNTER_F   U16_F
+#endif 
+
+struct stats_proto {
+  STAT_COUNTER xmit;             /* Transmitted packets. */
+  STAT_COUNTER recv;             /* Received packets. */
+  STAT_COUNTER fw;               /* Forwarded packets. */
+  STAT_COUNTER drop;             /* Dropped packets. */
+  STAT_COUNTER chkerr;           /* Checksum error. */
+  STAT_COUNTER lenerr;           /* Invalid length error. */
+  STAT_COUNTER memerr;           /* Out of memory error. */
+  STAT_COUNTER rterr;            /* Routing error. */
+  STAT_COUNTER proterr;          /* Protocol error. */
+  STAT_COUNTER opterr;           /* Error in options. */
+  STAT_COUNTER err;              /* Misc error. */
+  STAT_COUNTER cachehit;
+};
+
+struct stats_igmp {
+  STAT_COUNTER lenerr;           /* Invalid length error. */
+  STAT_COUNTER chkerr;           /* Checksum error. */
+  STAT_COUNTER v1_rxed;          /* */
+  STAT_COUNTER join_sent;        /* */
+  STAT_COUNTER leave_sent;       /* */
+  STAT_COUNTER unicast_query;    /* */
+  STAT_COUNTER report_sent;      /* */
+  STAT_COUNTER report_rxed;      /* */
+  STAT_COUNTER group_query_rxed; /* */
+};
+
+struct stats_mem {
+  mem_size_t avail;
+  mem_size_t used;
+  mem_size_t max;
+  STAT_COUNTER err;
+  STAT_COUNTER illegal;
+};
+
+struct stats_syselem {
+  STAT_COUNTER used;
+  STAT_COUNTER max;
+  STAT_COUNTER err;
+};
+
+struct stats_sys {
+  struct stats_syselem sem;
+  struct stats_syselem mbox;
+};
+
+struct stats_ {
+#if LINK_STATS
+  struct stats_proto link;
+#endif
+#if ETHARP_STATS
+  struct stats_proto etharp;
+#endif
+#if IPFRAG_STATS
+  struct stats_proto ip_frag;
+#endif
+#if IP_STATS
+  struct stats_proto ip;
+#endif
+#if ICMP_STATS
+  struct stats_proto icmp;
+#endif
+#if IGMP_STATS
+  struct stats_igmp igmp;
+#endif
+#if UDP_STATS
+  struct stats_proto udp;
+#endif
+#if TCP_STATS
+  struct stats_proto tcp;
+#endif
+#if MEM_STATS
+  struct stats_mem mem;
+#endif
+#if MEMP_STATS
+  struct stats_mem memp[MEMP_MAX];
+#endif
+#if SYS_STATS
+  struct stats_sys sys;
+#endif
+};
+
+extern struct stats_ lwip_stats;
+
+#define stats_init() /* Compatibility define, not init needed. */
+
+#define STATS_INC(x) ++lwip_stats.x
+#define STATS_DEC(x) --lwip_stats.x
+#else
+#define stats_init()
+#define STATS_INC(x)
+#define STATS_DEC(x)
+#endif /* LWIP_STATS */
+
+#if TCP_STATS
+#define TCP_STATS_INC(x) STATS_INC(x)
+#define TCP_STATS_DISPLAY() stats_display_proto(&lwip_stats.tcp, "TCP")
+#else
+#define TCP_STATS_INC(x)
+#define TCP_STATS_DISPLAY()
+#endif
+
+#if UDP_STATS
+#define UDP_STATS_INC(x) STATS_INC(x)
+#define UDP_STATS_DISPLAY() stats_display_proto(&lwip_stats.udp, "UDP")
+#else
+#define UDP_STATS_INC(x)
+#define UDP_STATS_DISPLAY()
+#endif
+
+#if ICMP_STATS
+#define ICMP_STATS_INC(x) STATS_INC(x)
+#define ICMP_STATS_DISPLAY() stats_display_proto(&lwip_stats.icmp, "ICMP")
+#else
+#define ICMP_STATS_INC(x)
+#define ICMP_STATS_DISPLAY()
+#endif
+
+#if IGMP_STATS
+#define IGMP_STATS_INC(x) STATS_INC(x)
+#define IGMP_STATS_DISPLAY() stats_display_igmp(&lwip_stats.igmp)
+#else
+#define IGMP_STATS_INC(x)
+#define IGMP_STATS_DISPLAY()
+#endif
+
+#if IP_STATS
+#define IP_STATS_INC(x) STATS_INC(x)
+#define IP_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip, "IP")
+#else
+#define IP_STATS_INC(x)
+#define IP_STATS_DISPLAY()
+#endif
+
+#if IPFRAG_STATS
+#define IPFRAG_STATS_INC(x) STATS_INC(x)
+#define IPFRAG_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip_frag, "IP_FRAG")
+#else
+#define IPFRAG_STATS_INC(x)
+#define IPFRAG_STATS_DISPLAY()
+#endif
+
+#if ETHARP_STATS
+#define ETHARP_STATS_INC(x) STATS_INC(x)
+#define ETHARP_STATS_DISPLAY() stats_display_proto(&lwip_stats.etharp, "ETHARP")
+#else
+#define ETHARP_STATS_INC(x)
+#define ETHARP_STATS_DISPLAY()
+#endif
+
+#if LINK_STATS
+#define LINK_STATS_INC(x) STATS_INC(x)
+#define LINK_STATS_DISPLAY() stats_display_proto(&lwip_stats.link, "LINK")
+#else
+#define LINK_STATS_INC(x)
+#define LINK_STATS_DISPLAY()
+#endif
+
+#if MEM_STATS
+#define MEM_STATS_AVAIL(x, y) lwip_stats.mem.x = y
+#define MEM_STATS_INC(x) STATS_INC(mem.x)
+#define MEM_STATS_INC_USED(x, y) do { lwip_stats.mem.used += y; \
+                                    if (lwip_stats.mem.max < lwip_stats.mem.used) { \
+                                        lwip_stats.mem.max = lwip_stats.mem.used; \
+                                    } \
+                                 } while(0)
+#define MEM_STATS_DEC_USED(x, y) lwip_stats.mem.x -= y
+#define MEM_STATS_DISPLAY() stats_display_mem(&lwip_stats.mem, "HEAP")
+#else
+#define MEM_STATS_AVAIL(x, y)
+#define MEM_STATS_INC(x)
+#define MEM_STATS_INC_USED(x, y)
+#define MEM_STATS_DEC_USED(x, y)
+#define MEM_STATS_DISPLAY()
+#endif
+
+#if MEMP_STATS
+#define MEMP_STATS_AVAIL(x, i, y) lwip_stats.memp[i].x = y
+#define MEMP_STATS_INC(x, i) STATS_INC(memp[i].x)
+#define MEMP_STATS_DEC(x, i) STATS_DEC(memp[i].x)
+#define MEMP_STATS_INC_USED(x, i) do { ++lwip_stats.memp[i].used; \
+                                    if (lwip_stats.memp[i].max < lwip_stats.memp[i].used) { \
+                                        lwip_stats.memp[i].max = lwip_stats.memp[i].used; \
+                                    } \
+                                 } while(0)
+#define MEMP_STATS_DISPLAY(i) stats_display_memp(&lwip_stats.memp[i], i)
+#else
+#define MEMP_STATS_AVAIL(x, i, y)
+#define MEMP_STATS_INC(x, i)
+#define MEMP_STATS_DEC(x, i)
+#define MEMP_STATS_INC_USED(x, i)
+#define MEMP_STATS_DISPLAY(i)
+#endif
+
+#if SYS_STATS
+#define SYS_STATS_INC(x) STATS_INC(sys.x)
+#define SYS_STATS_DEC(x) STATS_DEC(sys.x)
+#define SYS_STATS_DISPLAY() stats_display_sys(&lwip_stats.sys)
+#else
+#define SYS_STATS_INC(x)
+#define SYS_STATS_DEC(x)
+#define SYS_STATS_DISPLAY()
+#endif
+
+/* Display of statistics */
+#if LWIP_STATS_DISPLAY
+void stats_display(void);
+void stats_display_proto(struct stats_proto *proto, char *name);
+void stats_display_igmp(struct stats_igmp *igmp);
+void stats_display_mem(struct stats_mem *mem, char *name);
+void stats_display_memp(struct stats_mem *mem, int index);
+void stats_display_sys(struct stats_sys *sys);
+#else
+#define stats_display()
+#define stats_display_proto(proto, name)
+#define stats_display_igmp(igmp)
+#define stats_display_mem(mem, name)
+#define stats_display_memp(mem, index)
+#define stats_display_sys(sys)
+#endif /* LWIP_STATS_DISPLAY */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_STATS_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sys.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sys.h
new file mode 100644
index 000000000..0cc84ddf1
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/sys.h
@@ -0,0 +1,243 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_SYS_H__
+#define __LWIP_SYS_H__
+
+#include "lwip/opt.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if NO_SYS
+
+/* For a totally minimal and standalone system, we provide null
+   definitions of the sys_ functions. */
+typedef u8_t sys_sem_t;
+typedef u8_t sys_mbox_t;
+struct sys_timeo {u8_t dummy;};
+
+#define sys_init()
+#define sys_timeout(m,h,a)
+#define sys_untimeout(m,a)
+#define sys_sem_new(c) c
+#define sys_sem_signal(s)
+#define sys_sem_wait(s)
+#define sys_sem_wait_timeout(s,t)
+#define sys_arch_sem_wait(s,t)
+#define sys_sem_free(s)
+#define sys_mbox_new(s) 0
+#define sys_mbox_fetch(m,d)
+#define sys_mbox_tryfetch(m,d)
+#define sys_mbox_post(m,d)
+#define sys_mbox_trypost(m,d)
+#define sys_mbox_free(m)
+
+#define sys_thread_new(n,t,a,s,p)
+
+#else /* NO_SYS */
+
+/** Return code for timeouts from sys_arch_mbox_fetch and sys_arch_sem_wait */
+#define SYS_ARCH_TIMEOUT 0xffffffffUL
+
+/* sys_mbox_tryfetch returns SYS_MBOX_EMPTY if appropriate.
+ * For now we use the same magic value, but we allow this to change in future.
+ */
+#define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT 
+
+#include "lwip/err.h"
+#include "arch/sys_arch.h"
+
+typedef void (* sys_timeout_handler)(void *arg);
+
+struct sys_timeo {
+  struct sys_timeo *next;
+  u32_t time;
+  sys_timeout_handler h;
+  void *arg;
+};
+
+struct sys_timeouts {
+  struct sys_timeo *next;
+};
+
+/* sys_init() must be called before anthing else. */
+void sys_init(void);
+
+/*
+ * sys_timeout():
+ *
+ * Schedule a timeout a specified amount of milliseconds in the
+ * future. When the timeout occurs, the specified timeout handler will
+ * be called. The handler will be passed the "arg" argument when
+ * called.
+ *
+ */
+void sys_timeout(u32_t msecs, sys_timeout_handler h, void *arg);
+void sys_untimeout(sys_timeout_handler h, void *arg);
+struct sys_timeouts *sys_arch_timeouts(void);
+
+/* Semaphore functions. */
+sys_sem_t sys_sem_new(u8_t count);
+void sys_sem_signal(sys_sem_t sem);
+u32_t sys_arch_sem_wait(sys_sem_t sem, u32_t timeout);
+void sys_sem_free(sys_sem_t sem);
+void sys_sem_wait(sys_sem_t sem);
+int sys_sem_wait_timeout(sys_sem_t sem, u32_t timeout);
+
+/* Time functions. */
+#ifndef sys_msleep
+void sys_msleep(u32_t ms); /* only has a (close to) 1 jiffy resolution. */
+#endif
+#ifndef sys_jiffies
+u32_t sys_jiffies(void); /* since power up. */
+#endif
+
+/* Mailbox functions. */
+sys_mbox_t sys_mbox_new(int size);
+void sys_mbox_post(sys_mbox_t mbox, void *msg);
+err_t sys_mbox_trypost(sys_mbox_t mbox, void *msg);
+u32_t sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u32_t timeout);
+#ifndef sys_arch_mbox_tryfetch /* Allow port to override with a macro */
+u32_t sys_arch_mbox_tryfetch(sys_mbox_t mbox, void **msg);
+#endif
+/* For now, we map straight to sys_arch implementation. */
+#define sys_mbox_tryfetch(mbox, msg) sys_arch_mbox_tryfetch(mbox, msg)
+void sys_mbox_free(sys_mbox_t mbox);
+void sys_mbox_fetch(sys_mbox_t mbox, void **msg);
+
+/* Thread functions. */
+sys_thread_t sys_thread_new(char *name, void (* thread)(void *arg), void *arg, int stacksize, int prio);
+
+#endif /* NO_SYS */
+
+/** Returns the current time in milliseconds. */
+u32_t sys_now(void);
+
+/* Critical Region Protection */
+/* These functions must be implemented in the sys_arch.c file.
+   In some implementations they can provide a more light-weight protection
+   mechanism than using semaphores. Otherwise semaphores can be used for
+   implementation */
+#ifndef SYS_ARCH_PROTECT
+/** SYS_LIGHTWEIGHT_PROT
+ * define SYS_LIGHTWEIGHT_PROT in lwipopts.h if you want inter-task protection
+ * for certain critical regions during buffer allocation, deallocation and memory
+ * allocation and deallocation.
+ */
+#if SYS_LIGHTWEIGHT_PROT
+
+/** SYS_ARCH_DECL_PROTECT
+ * declare a protection variable. This macro will default to defining a variable of
+ * type sys_prot_t. If a particular port needs a different implementation, then
+ * this macro may be defined in sys_arch.h.
+ */
+#define SYS_ARCH_DECL_PROTECT(lev) sys_prot_t lev
+/** SYS_ARCH_PROTECT
+ * Perform a "fast" protect. This could be implemented by
+ * disabling interrupts for an embedded system or by using a semaphore or
+ * mutex. The implementation should allow calling SYS_ARCH_PROTECT when
+ * already protected. The old protection level is returned in the variable
+ * "lev". This macro will default to calling the sys_arch_protect() function
+ * which should be implemented in sys_arch.c. If a particular port needs a
+ * different implementation, then this macro may be defined in sys_arch.h
+ */
+#define SYS_ARCH_PROTECT(lev) lev = sys_arch_protect()
+/** SYS_ARCH_UNPROTECT
+ * Perform a "fast" set of the protection level to "lev". This could be
+ * implemented by setting the interrupt level to "lev" within the MACRO or by
+ * using a semaphore or mutex.  This macro will default to calling the
+ * sys_arch_unprotect() function which should be implemented in
+ * sys_arch.c. If a particular port needs a different implementation, then
+ * this macro may be defined in sys_arch.h
+ */
+#define SYS_ARCH_UNPROTECT(lev) sys_arch_unprotect(lev)
+sys_prot_t sys_arch_protect(void);
+void sys_arch_unprotect(sys_prot_t pval);
+
+#else
+
+#define SYS_ARCH_DECL_PROTECT(lev)
+#define SYS_ARCH_PROTECT(lev)
+#define SYS_ARCH_UNPROTECT(lev)
+
+#endif /* SYS_LIGHTWEIGHT_PROT */
+
+#endif /* SYS_ARCH_PROTECT */
+
+/*
+ * Macros to set/get and increase/decrease variables in a thread-safe way.
+ * Use these for accessing variable that are used from more than one thread.
+ */
+
+#ifndef SYS_ARCH_INC
+#define SYS_ARCH_INC(var, val) do { \
+                                SYS_ARCH_DECL_PROTECT(old_level); \
+                                SYS_ARCH_PROTECT(old_level); \
+                                var += val; \
+                                SYS_ARCH_UNPROTECT(old_level); \
+                              } while(0)
+#endif /* SYS_ARCH_INC */
+
+#ifndef SYS_ARCH_DEC
+#define SYS_ARCH_DEC(var, val) do { \
+                                SYS_ARCH_DECL_PROTECT(old_level); \
+                                SYS_ARCH_PROTECT(old_level); \
+                                var -= val; \
+                                SYS_ARCH_UNPROTECT(old_level); \
+                              } while(0)
+#endif /* SYS_ARCH_DEC */
+
+#ifndef SYS_ARCH_GET
+#define SYS_ARCH_GET(var, ret) do { \
+                                SYS_ARCH_DECL_PROTECT(old_level); \
+                                SYS_ARCH_PROTECT(old_level); \
+                                ret = var; \
+                                SYS_ARCH_UNPROTECT(old_level); \
+                              } while(0)
+#endif /* SYS_ARCH_GET */
+
+#ifndef SYS_ARCH_SET
+#define SYS_ARCH_SET(var, val) do { \
+                                SYS_ARCH_DECL_PROTECT(old_level); \
+                                SYS_ARCH_PROTECT(old_level); \
+                                var = val; \
+                                SYS_ARCH_UNPROTECT(old_level); \
+                              } while(0)
+#endif /* SYS_ARCH_SET */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LWIP_SYS_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/tcp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/tcp.h
new file mode 100644
index 000000000..8f6b9d3c1
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/tcp.h
@@ -0,0 +1,699 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_TCP_H__
+#define __LWIP_TCP_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_TCP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/sys.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/ip.h"
+#include "lwip/icmp.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct tcp_pcb;
+
+/* Functions for interfacing with TCP: */
+
+/* Lower layer interface to TCP: */
+#define tcp_init() /* Compatibility define, not init needed. */
+void             tcp_tmr     (void);  /* Must be called every
+                                         TCP_TMR_INTERVAL
+                                         ms. (Typically 250 ms). */
+/* Application program's interface: */
+struct tcp_pcb * tcp_new     (void);
+struct tcp_pcb * tcp_alloc   (u8_t prio);
+
+void             tcp_arg     (struct tcp_pcb *pcb, void *arg);
+void             tcp_accept  (struct tcp_pcb *pcb,
+                              err_t (* accept)(void *arg, struct tcp_pcb *newpcb,
+                 err_t err));
+void             tcp_recv    (struct tcp_pcb *pcb,
+                              err_t (* recv)(void *arg, struct tcp_pcb *tpcb,
+                              struct pbuf *p, err_t err));
+void             tcp_sent    (struct tcp_pcb *pcb,
+                              err_t (* sent)(void *arg, struct tcp_pcb *tpcb,
+                              u16_t len));
+void             tcp_poll    (struct tcp_pcb *pcb,
+                              err_t (* poll)(void *arg, struct tcp_pcb *tpcb),
+                              u8_t interval);
+void             tcp_err     (struct tcp_pcb *pcb,
+                              void (* err)(void *arg, err_t err));
+
+#define          tcp_mss(pcb)      ((pcb)->mss)
+#define          tcp_sndbuf(pcb)   ((pcb)->snd_buf)
+
+#if TCP_LISTEN_BACKLOG
+#define          tcp_accepted(pcb) (((struct tcp_pcb_listen *)(pcb))->accepts_pending--)
+#else  /* TCP_LISTEN_BACKLOG */
+#define          tcp_accepted(pcb)
+#endif /* TCP_LISTEN_BACKLOG */
+
+void             tcp_recved  (struct tcp_pcb *pcb, u16_t len);
+err_t            tcp_bind    (struct tcp_pcb *pcb, struct ip_addr *ipaddr,
+                              u16_t port);
+err_t            tcp_connect (struct tcp_pcb *pcb, struct ip_addr *ipaddr,
+                              u16_t port, err_t (* connected)(void *arg,
+                              struct tcp_pcb *tpcb,
+                              err_t err));
+
+struct tcp_pcb * tcp_listen_with_backlog(struct tcp_pcb *pcb, u8_t backlog);
+#define          tcp_listen(pcb) tcp_listen_with_backlog(pcb, TCP_DEFAULT_LISTEN_BACKLOG)
+
+void             tcp_abandon (struct tcp_pcb *pcb, int reset);
+#define          tcp_abort(pcb) tcp_abandon((pcb), 1)
+err_t            tcp_close   (struct tcp_pcb *pcb);
+
+/* Flags for "apiflags" parameter in tcp_write and tcp_enqueue */
+#define TCP_WRITE_FLAG_COPY 0x01
+#define TCP_WRITE_FLAG_MORE 0x02
+
+err_t            tcp_write   (struct tcp_pcb *pcb, const void *dataptr, u16_t len,
+                              u8_t apiflags);
+
+void             tcp_setprio (struct tcp_pcb *pcb, u8_t prio);
+
+#define TCP_PRIO_MIN    1
+#define TCP_PRIO_NORMAL 64
+#define TCP_PRIO_MAX    127
+
+/* It is also possible to call these two functions at the right
+   intervals (instead of calling tcp_tmr()). */
+void             tcp_slowtmr (void);
+void             tcp_fasttmr (void);
+
+
+/* Only used by IP to pass a TCP segment to TCP: */
+void             tcp_input   (struct pbuf *p, struct netif *inp);
+/* Used within the TCP code only: */
+err_t            tcp_output  (struct tcp_pcb *pcb);
+void             tcp_rexmit  (struct tcp_pcb *pcb);
+void             tcp_rexmit_rto  (struct tcp_pcb *pcb);
+u32_t            tcp_update_rcv_ann_wnd(struct tcp_pcb *pcb);
+
+/**
+ * This is the Nagle algorithm: try to combine user data to send as few TCP
+ * segments as possible. Only send if
+ * - no previously transmitted data on the connection remains unacknowledged or
+ * - the TF_NODELAY flag is set (nagle algorithm turned off for this pcb) or
+ * - the only unsent segment is at least pcb->mss bytes long (or there is more
+ *   than one unsent segment - with lwIP, this can happen although unsent->len < mss)
+ */
+#define tcp_do_output_nagle(tpcb) ((((tpcb)->unacked == NULL) || \
+                            ((tpcb)->flags & TF_NODELAY) || \
+                            (((tpcb)->unsent != NULL) && (((tpcb)->unsent->next != NULL) || \
+                              ((tpcb)->unsent->len >= (tpcb)->mss))) \
+                            ) ? 1 : 0)
+#define tcp_output_nagle(tpcb) (tcp_do_output_nagle(tpcb) ? tcp_output(tpcb) : ERR_OK)
+
+
+#define TCP_SEQ_LT(a,b)     ((s32_t)((a)-(b)) < 0)
+#define TCP_SEQ_LEQ(a,b)    ((s32_t)((a)-(b)) <= 0)
+#define TCP_SEQ_GT(a,b)     ((s32_t)((a)-(b)) > 0)
+#define TCP_SEQ_GEQ(a,b)    ((s32_t)((a)-(b)) >= 0)
+/* is b<=a<=c? */
+#if 0 /* see bug #10548 */
+#define TCP_SEQ_BETWEEN(a,b,c) ((c)-(b) >= (a)-(b))
+#endif
+#define TCP_SEQ_BETWEEN(a,b,c) (TCP_SEQ_GEQ(a,b) && TCP_SEQ_LEQ(a,c))
+#define TCP_FIN 0x01U
+#define TCP_SYN 0x02U
+#define TCP_RST 0x04U
+#define TCP_PSH 0x08U
+#define TCP_ACK 0x10U
+#define TCP_URG 0x20U
+#define TCP_ECE 0x40U
+#define TCP_CWR 0x80U
+
+#define TCP_FLAGS 0x3fU
+
+/* Length of the TCP header, excluding options. */
+#define TCP_HLEN 20
+
+#ifndef TCP_TMR_INTERVAL
+#define TCP_TMR_INTERVAL       250  /* The TCP timer interval in milliseconds. */
+#endif /* TCP_TMR_INTERVAL */
+
+#ifndef TCP_FAST_INTERVAL
+#define TCP_FAST_INTERVAL      TCP_TMR_INTERVAL /* the fine grained timeout in milliseconds */
+#endif /* TCP_FAST_INTERVAL */
+
+#ifndef TCP_SLOW_INTERVAL
+#define TCP_SLOW_INTERVAL      (2*TCP_TMR_INTERVAL)  /* the coarse grained timeout in milliseconds */
+#endif /* TCP_SLOW_INTERVAL */
+
+#define TCP_FIN_WAIT_TIMEOUT 20000 /* milliseconds */
+#define TCP_SYN_RCVD_TIMEOUT 20000 /* milliseconds */
+
+#define TCP_OOSEQ_TIMEOUT        6U /* x RTO */
+
+#ifndef TCP_MSL
+#define TCP_MSL 60000UL /* The maximum segment lifetime in milliseconds */
+#endif
+
+/* Keepalive values, compliant with RFC 1122. Don't change this unless you know what you're doing */
+#ifndef  TCP_KEEPIDLE_DEFAULT
+#define  TCP_KEEPIDLE_DEFAULT     7200000UL /* Default KEEPALIVE timer in milliseconds */
+#endif
+
+#ifndef  TCP_KEEPINTVL_DEFAULT
+#define  TCP_KEEPINTVL_DEFAULT    75000UL   /* Default Time between KEEPALIVE probes in milliseconds */
+#endif
+
+#ifndef  TCP_KEEPCNT_DEFAULT
+#define  TCP_KEEPCNT_DEFAULT      9U        /* Default Counter for KEEPALIVE probes */
+#endif
+
+#define  TCP_MAXIDLE              TCP_KEEPCNT_DEFAULT * TCP_KEEPINTVL_DEFAULT  /* Maximum KEEPALIVE probe time */
+
+/* Fields are (of course) in network byte order.
+ * Some fields are converted to host byte order in tcp_input().
+ */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct tcp_hdr {
+  PACK_STRUCT_FIELD(u16_t src);
+  PACK_STRUCT_FIELD(u16_t dest);
+  PACK_STRUCT_FIELD(u32_t seqno);
+  PACK_STRUCT_FIELD(u32_t ackno);
+  PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags);
+  PACK_STRUCT_FIELD(u16_t wnd);
+  PACK_STRUCT_FIELD(u16_t chksum);
+  PACK_STRUCT_FIELD(u16_t urgp);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#define TCPH_OFFSET(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 8)
+#define TCPH_HDRLEN(phdr) (ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)
+#define TCPH_FLAGS(phdr)  (ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)
+
+#define TCPH_OFFSET_SET(phdr, offset) (phdr)->_hdrlen_rsvd_flags = htons(((offset) << 8) | TCPH_FLAGS(phdr))
+#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = htons(((len) << 12) | TCPH_FLAGS(phdr))
+#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons((ntohs((phdr)->_hdrlen_rsvd_flags) & ~TCP_FLAGS) | (flags))
+#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (flags))
+#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = htons(ntohs((phdr)->_hdrlen_rsvd_flags) | (TCPH_FLAGS(phdr) & ~(flags)) )
+
+#define TCP_TCPLEN(seg) ((seg)->len + ((TCPH_FLAGS((seg)->tcphdr) & TCP_FIN || \
+          TCPH_FLAGS((seg)->tcphdr) & TCP_SYN)? 1: 0))
+
+enum tcp_state {
+  CLOSED      = 0,
+  LISTEN      = 1,
+  SYN_SENT    = 2,
+  SYN_RCVD    = 3,
+  ESTABLISHED = 4,
+  FIN_WAIT_1  = 5,
+  FIN_WAIT_2  = 6,
+  CLOSE_WAIT  = 7,
+  CLOSING     = 8,
+  LAST_ACK    = 9,
+  TIME_WAIT   = 10
+};
+
+/** Flags used on input processing, not on pcb->flags
+*/
+#define TF_RESET     (u8_t)0x08U   /* Connection was reset. */
+#define TF_CLOSED    (u8_t)0x10U   /* Connection was sucessfully closed. */
+#define TF_GOT_FIN   (u8_t)0x20U   /* Connection was closed by the remote end. */
+
+
+#if LWIP_CALLBACK_API
+  /* Function to call when a listener has been connected.
+   * @param arg user-supplied argument (tcp_pcb.callback_arg)
+   * @param pcb a new tcp_pcb that now is connected
+   * @param err an error argument (TODO: that is current always ERR_OK?)
+   * @return ERR_OK: accept the new connection,
+   *                 any other err_t abortsthe new connection
+   */
+#define DEF_ACCEPT_CALLBACK  err_t (* accept)(void *arg, struct tcp_pcb *newpcb, err_t err)
+#else /* LWIP_CALLBACK_API */
+#define DEF_ACCEPT_CALLBACK
+#endif /* LWIP_CALLBACK_API */
+
+/**
+ * members common to struct tcp_pcb and struct tcp_listen_pcb
+ */
+#define TCP_PCB_COMMON(type) \
+  type *next; /* for the linked list */ \
+  enum tcp_state state; /* TCP state */ \
+  u8_t prio; \
+  void *callback_arg; \
+  /* ports are in host byte order */ \
+  u16_t local_port; \
+  /* the accept callback for listen- and normal pcbs, if LWIP_CALLBACK_API */ \
+  DEF_ACCEPT_CALLBACK
+
+
+/* the TCP protocol control block */
+struct tcp_pcb {
+/** common PCB members */
+  IP_PCB;
+/** protocol specific PCB members */
+  TCP_PCB_COMMON(struct tcp_pcb);
+
+  /* ports are in host byte order */
+  u16_t remote_port;
+  
+  u8_t flags;
+#define TF_ACK_DELAY   ((u8_t)0x01U)   /* Delayed ACK. */
+#define TF_ACK_NOW     ((u8_t)0x02U)   /* Immediate ACK. */
+#define TF_INFR        ((u8_t)0x04U)   /* In fast recovery. */
+#define TF_TIMESTAMP   ((u8_t)0x08U)   /* Timestamp option enabled */
+#define TF_FIN         ((u8_t)0x20U)   /* Connection was closed locally (FIN segment enqueued). */
+#define TF_NODELAY     ((u8_t)0x40U)   /* Disable Nagle algorithm */
+#define TF_NAGLEMEMERR ((u8_t)0x80U)   /* nagle enabled, memerr, try to output to prevent delayed ACK to happen */
+
+  /* the rest of the fields are in host byte order
+     as we have to do some math with them */
+  /* receiver variables */
+  u32_t rcv_nxt;   /* next seqno expected */
+  u16_t rcv_wnd;   /* receiver window available */
+  u16_t rcv_ann_wnd; /* receiver window to announce */
+  u32_t rcv_ann_right_edge; /* announced right edge of window */
+
+  /* Timers */
+  u32_t tmr;
+  u8_t polltmr, pollinterval;
+  
+  /* Retransmission timer. */
+  s16_t rtime;
+  
+  u16_t mss;   /* maximum segment size */
+  
+  /* RTT (round trip time) estimation variables */
+  u32_t rttest; /* RTT estimate in 500ms ticks */
+  u32_t rtseq;  /* sequence number being timed */
+  s16_t sa, sv; /* @todo document this */
+
+  s16_t rto;    /* retransmission time-out */
+  u8_t nrtx;    /* number of retransmissions */
+
+  /* fast retransmit/recovery */
+  u32_t lastack; /* Highest acknowledged seqno. */
+  u8_t dupacks;
+  
+  /* congestion avoidance/control variables */
+  u16_t cwnd;  
+  u16_t ssthresh;
+
+  /* sender variables */
+  u32_t snd_nxt;   /* next new seqno to be sent */
+  u16_t snd_wnd;   /* sender window */
+  u32_t snd_wl1, snd_wl2; /* Sequence and acknowledgement numbers of last
+                             window update. */
+  u32_t snd_lbb;       /* Sequence number of next byte to be buffered. */
+
+  u16_t acked;
+  
+  u16_t snd_buf;   /* Available buffer space for sending (in bytes). */
+#define TCP_SNDQUEUELEN_OVERFLOW (0xffff-3)
+  u16_t snd_queuelen; /* Available buffer space for sending (in tcp_segs). */
+  
+  
+  /* These are ordered by sequence number: */
+  struct tcp_seg *unsent;   /* Unsent (queued) segments. */
+  struct tcp_seg *unacked;  /* Sent but unacknowledged segments. */
+#if TCP_QUEUE_OOSEQ  
+  struct tcp_seg *ooseq;    /* Received out of sequence segments. */
+#endif /* TCP_QUEUE_OOSEQ */
+
+  struct pbuf *refused_data; /* Data previously received but not yet taken by upper layer */
+
+#if LWIP_CALLBACK_API
+  /* Function to be called when more send buffer space is available.
+   * @param arg user-supplied argument (tcp_pcb.callback_arg)
+   * @param pcb the tcp_pcb which has send buffer space available
+   * @param space the amount of bytes available
+   * @return ERR_OK: try to send some data by calling tcp_output
+   */
+  err_t (* sent)(void *arg, struct tcp_pcb *pcb, u16_t space);
+  
+  /* Function to be called when (in-sequence) data has arrived.
+   * @param arg user-supplied argument (tcp_pcb.callback_arg)
+   * @param pcb the tcp_pcb for which data has arrived
+   * @param p the packet buffer which arrived
+   * @param err an error argument (TODO: that is current always ERR_OK?)
+   * @return ERR_OK: try to send some data by calling tcp_output
+   */
+  err_t (* recv)(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err);
+
+  /* Function to be called when a connection has been set up.
+   * @param arg user-supplied argument (tcp_pcb.callback_arg)
+   * @param pcb the tcp_pcb that now is connected
+   * @param err an error argument (TODO: that is current always ERR_OK?)
+   * @return value is currently ignored
+   */
+  err_t (* connected)(void *arg, struct tcp_pcb *pcb, err_t err);
+
+  /* Function which is called periodically.
+   * The period can be adjusted in multiples of the TCP slow timer interval
+   * by changing tcp_pcb.polltmr.
+   * @param arg user-supplied argument (tcp_pcb.callback_arg)
+   * @param pcb the tcp_pcb to poll for
+   * @return ERR_OK: try to send some data by calling tcp_output
+   */
+  err_t (* poll)(void *arg, struct tcp_pcb *pcb);
+
+  /* Function to be called whenever a fatal error occurs.
+   * There is no pcb parameter since most of the times, the pcb is
+   * already deallocated (or there is no pcb) when this function is called.
+   * @param arg user-supplied argument (tcp_pcb.callback_arg)
+   * @param err an indication why the error callback is called:
+   *            ERR_ABRT: aborted through tcp_abort or by a TCP timer
+   *            ERR_RST: the connection was reset by the remote host
+   */
+  void (* errf)(void *arg, err_t err);
+#endif /* LWIP_CALLBACK_API */
+
+#if LWIP_TCP_TIMESTAMPS
+  u32_t ts_lastacksent;
+  u32_t ts_recent;
+#endif /* LWIP_TCP_TIMESTAMPS */
+
+  /* idle time before KEEPALIVE is sent */
+  u32_t keep_idle;
+#if LWIP_TCP_KEEPALIVE
+  u32_t keep_intvl;
+  u32_t keep_cnt;
+#endif /* LWIP_TCP_KEEPALIVE */
+  
+  /* Persist timer counter */
+  u32_t persist_cnt;
+  /* Persist timer back-off */
+  u8_t persist_backoff;
+
+  /* KEEPALIVE counter */
+  u8_t keep_cnt_sent;
+};
+
+struct tcp_pcb_listen {  
+/* Common members of all PCB types */
+  IP_PCB;
+/* Protocol specific PCB members */
+  TCP_PCB_COMMON(struct tcp_pcb_listen);
+
+#if TCP_LISTEN_BACKLOG
+  u8_t backlog;
+  u8_t accepts_pending;
+#endif /* TCP_LISTEN_BACKLOG */
+};
+
+#if LWIP_EVENT_API
+
+enum lwip_event {
+  LWIP_EVENT_ACCEPT,
+  LWIP_EVENT_SENT,
+  LWIP_EVENT_RECV,
+  LWIP_EVENT_CONNECTED,
+  LWIP_EVENT_POLL,
+  LWIP_EVENT_ERR
+};
+
+err_t lwip_tcp_event(void *arg, struct tcp_pcb *pcb,
+         enum lwip_event,
+         struct pbuf *p,
+         u16_t size,
+         err_t err);
+
+#define TCP_EVENT_ACCEPT(pcb,err,ret)    ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+                LWIP_EVENT_ACCEPT, NULL, 0, err)
+#define TCP_EVENT_SENT(pcb,space,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+                   LWIP_EVENT_SENT, NULL, space, ERR_OK)
+#define TCP_EVENT_RECV(pcb,p,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+                LWIP_EVENT_RECV, (p), 0, (err))
+#define TCP_EVENT_CONNECTED(pcb,err,ret) ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+                LWIP_EVENT_CONNECTED, NULL, 0, (err))
+#define TCP_EVENT_POLL(pcb,ret)       ret = lwip_tcp_event((pcb)->callback_arg, (pcb),\
+                LWIP_EVENT_POLL, NULL, 0, ERR_OK)
+#define TCP_EVENT_ERR(errf,arg,err)  lwip_tcp_event((arg), NULL, \
+                LWIP_EVENT_ERR, NULL, 0, (err))
+#else /* LWIP_EVENT_API */
+
+#define TCP_EVENT_ACCEPT(pcb,err,ret)                          \
+  do {                                                         \
+    if((pcb)->accept != NULL)                                  \
+      (ret) = (pcb)->accept((pcb)->callback_arg,(pcb),(err));  \
+    else (ret) = ERR_OK;                                       \
+  } while (0)
+
+#define TCP_EVENT_SENT(pcb,space,ret)                          \
+  do {                                                         \
+    if((pcb)->sent != NULL)                                    \
+      (ret) = (pcb)->sent((pcb)->callback_arg,(pcb),(space));  \
+    else (ret) = ERR_OK;                                       \
+  } while (0)
+
+#define TCP_EVENT_RECV(pcb,p,err,ret)                           \
+  do {                                                          \
+    if((pcb)->recv != NULL) {                                   \
+      (ret) = (pcb)->recv((pcb)->callback_arg,(pcb),(p),(err)); \
+    } else {                                                    \
+      (ret) = ERR_OK;                                           \
+      if (p != NULL)                                            \
+        pbuf_free(p);                                           \
+    }                                                           \
+  } while (0)
+
+#define TCP_EVENT_CONNECTED(pcb,err,ret)                         \
+  do {                                                           \
+    if((pcb)->connected != NULL)                                 \
+      (ret) = (pcb)->connected((pcb)->callback_arg,(pcb),(err)); \
+    else (ret) = ERR_OK;                                         \
+  } while (0)
+
+#define TCP_EVENT_POLL(pcb,ret)                                \
+  do {                                                         \
+    if((pcb)->poll != NULL)                                    \
+      (ret) = (pcb)->poll((pcb)->callback_arg,(pcb));          \
+    else (ret) = ERR_OK;                                       \
+  } while (0)
+
+#define TCP_EVENT_ERR(errf,arg,err)                            \
+  do {                                                         \
+    if((errf) != NULL)                                         \
+      (errf)((arg),(err));                                     \
+  } while (0)
+
+#endif /* LWIP_EVENT_API */
+
+/* This structure represents a TCP segment on the unsent and unacked queues */
+struct tcp_seg {
+  struct tcp_seg *next;    /* used when putting segements on a queue */
+  struct pbuf *p;          /* buffer containing data + TCP header */
+  void *dataptr;           /* pointer to the TCP data in the pbuf */
+  u16_t len;               /* the TCP length of this segment */
+  u8_t  flags;
+#define TF_SEG_OPTS_MSS   (u8_t)0x01U   /* Include MSS option. */
+#define TF_SEG_OPTS_TS    (u8_t)0x02U   /* Include timestamp option. */
+  struct tcp_hdr *tcphdr;  /* the TCP header */
+};
+
+#define LWIP_TCP_OPT_LENGTH(flags)              \
+  (flags & TF_SEG_OPTS_MSS ? 4  : 0) +          \
+  (flags & TF_SEG_OPTS_TS  ? 12 : 0)
+
+/** This returns a TCP header option for MSS in an u32_t */
+#define TCP_BUILD_MSS_OPTION(x) (x) = htonl(((u32_t)2 << 24) |          \
+                                            ((u32_t)4 << 16) |          \
+                                            (((u32_t)TCP_MSS / 256) << 8) | \
+                                            (TCP_MSS & 255))
+
+/* Internal functions and global variables: */
+struct tcp_pcb *tcp_pcb_copy(struct tcp_pcb *pcb);
+void tcp_pcb_purge(struct tcp_pcb *pcb);
+void tcp_pcb_remove(struct tcp_pcb **pcblist, struct tcp_pcb *pcb);
+
+u8_t tcp_segs_free(struct tcp_seg *seg);
+u8_t tcp_seg_free(struct tcp_seg *seg);
+struct tcp_seg *tcp_seg_copy(struct tcp_seg *seg);
+
+#define tcp_ack(pcb)                               \
+  do {                                             \
+    if((pcb)->flags & TF_ACK_DELAY) {              \
+      (pcb)->flags &= ~TF_ACK_DELAY;               \
+      (pcb)->flags |= TF_ACK_NOW;                  \
+      tcp_output(pcb);                             \
+    }                                              \
+    else {                                         \
+      (pcb)->flags |= TF_ACK_DELAY;                \
+    }                                              \
+  } while (0)
+
+#define tcp_ack_now(pcb)                           \
+  do {                                             \
+    (pcb)->flags |= TF_ACK_NOW;                    \
+    tcp_output(pcb);                               \
+  } while (0)
+
+err_t tcp_send_ctrl(struct tcp_pcb *pcb, u8_t flags);
+err_t tcp_enqueue(struct tcp_pcb *pcb, void *dataptr, u16_t len,
+                  u8_t flags, u8_t apiflags, u8_t optflags);
+
+void tcp_rexmit_seg(struct tcp_pcb *pcb, struct tcp_seg *seg);
+
+void tcp_rst(u32_t seqno, u32_t ackno,
+       struct ip_addr *local_ip, struct ip_addr *remote_ip,
+       u16_t local_port, u16_t remote_port);
+
+u32_t tcp_next_iss(void);
+
+void tcp_keepalive(struct tcp_pcb *pcb);
+void tcp_zero_window_probe(struct tcp_pcb *pcb);
+
+#if TCP_CALCULATE_EFF_SEND_MSS
+u16_t tcp_eff_send_mss(u16_t sendmss, struct ip_addr *addr);
+#endif /* TCP_CALCULATE_EFF_SEND_MSS */
+
+extern struct tcp_pcb *tcp_input_pcb;
+extern u32_t tcp_ticks;
+
+#if TCP_DEBUG || TCP_INPUT_DEBUG || TCP_OUTPUT_DEBUG
+void tcp_debug_print(struct tcp_hdr *tcphdr);
+void tcp_debug_print_flags(u8_t flags);
+void tcp_debug_print_state(enum tcp_state s);
+void tcp_debug_print_pcbs(void);
+s16_t tcp_pcbs_sane(void);
+#else
+#  define tcp_debug_print(tcphdr)
+#  define tcp_debug_print_flags(flags)
+#  define tcp_debug_print_state(s)
+#  define tcp_debug_print_pcbs()
+#  define tcp_pcbs_sane() 1
+#endif /* TCP_DEBUG */
+
+#if NO_SYS
+#define tcp_timer_needed()
+#else
+void tcp_timer_needed(void);
+#endif
+
+/* The TCP PCB lists. */
+union tcp_listen_pcbs_t { /* List of all TCP PCBs in LISTEN state. */
+  struct tcp_pcb_listen *listen_pcbs; 
+  struct tcp_pcb *pcbs;
+};
+extern union tcp_listen_pcbs_t tcp_listen_pcbs;
+extern struct tcp_pcb *tcp_active_pcbs;  /* List of all TCP PCBs that are in a
+              state in which they accept or send
+              data. */
+extern struct tcp_pcb *tcp_tw_pcbs;      /* List of all TCP PCBs in TIME-WAIT. */
+
+extern struct tcp_pcb *tcp_tmp_pcb;      /* Only used for temporary storage. */
+
+/* Axioms about the above lists:   
+   1) Every TCP PCB that is not CLOSED is in one of the lists.
+   2) A PCB is only in one of the lists.
+   3) All PCBs in the tcp_listen_pcbs list is in LISTEN state.
+   4) All PCBs in the tcp_tw_pcbs list is in TIME-WAIT state.
+*/
+
+/* Define two macros, TCP_REG and TCP_RMV that registers a TCP PCB
+   with a PCB list or removes a PCB from a list, respectively. */
+#if 0
+#define TCP_REG(pcbs, npcb) do {\
+                            LWIP_DEBUGF(TCP_DEBUG, ("TCP_REG %p local port %d\n", npcb, npcb->local_port)); \
+                            for(tcp_tmp_pcb = *pcbs; \
+          tcp_tmp_pcb != NULL; \
+        tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+                                LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != npcb); \
+                            } \
+                            LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", npcb->state != CLOSED); \
+                            npcb->next = *pcbs; \
+                            LWIP_ASSERT("TCP_REG: npcb->next != npcb", npcb->next != npcb); \
+                            *(pcbs) = npcb; \
+                            LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
+              tcp_timer_needed(); \
+                            } while(0)
+#define TCP_RMV(pcbs, npcb) do { \
+                            LWIP_ASSERT("TCP_RMV: pcbs != NULL", *pcbs != NULL); \
+                            LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removing %p from %p\n", npcb, *pcbs)); \
+                            if(*pcbs == npcb) { \
+                               *pcbs = (*pcbs)->next; \
+                            } else for(tcp_tmp_pcb = *pcbs; tcp_tmp_pcb != NULL; tcp_tmp_pcb = tcp_tmp_pcb->next) { \
+                               if(tcp_tmp_pcb->next != NULL && tcp_tmp_pcb->next == npcb) { \
+                                  tcp_tmp_pcb->next = npcb->next; \
+                                  break; \
+                               } \
+                            } \
+                            npcb->next = NULL; \
+                            LWIP_ASSERT("TCP_RMV: tcp_pcbs sane", tcp_pcbs_sane()); \
+                            LWIP_DEBUGF(TCP_DEBUG, ("TCP_RMV: removed %p from %p\n", npcb, *pcbs)); \
+                            } while(0)
+
+#else /* LWIP_DEBUG */
+
+#define TCP_REG(pcbs, npcb)                        \
+  do {                                             \
+    npcb->next = *pcbs;                            \
+    *(pcbs) = npcb;                                \
+    tcp_timer_needed();                            \
+  } while (0)
+
+#define TCP_RMV(pcbs, npcb)                        \
+  do {                                             \
+    if(*(pcbs) == npcb) {                          \
+      (*(pcbs)) = (*pcbs)->next;                   \
+    }                                              \
+    else {                                         \
+      for(tcp_tmp_pcb = *pcbs;                                         \
+          tcp_tmp_pcb != NULL;                                         \
+          tcp_tmp_pcb = tcp_tmp_pcb->next) {                           \
+        if(tcp_tmp_pcb->next != NULL && tcp_tmp_pcb->next == npcb) {   \
+          tcp_tmp_pcb->next = npcb->next;          \
+          break;                                   \
+        }                                          \
+      }                                            \
+    }                                              \
+    npcb->next = NULL;                             \
+  } while(0)
+
+#endif /* LWIP_DEBUG */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_TCP */
+
+#endif /* __LWIP_TCP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/tcpip.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/tcpip.h
new file mode 100644
index 000000000..75393ee91
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/tcpip.h
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_TCPIP_H__
+#define __LWIP_TCPIP_H__
+
+#include "lwip/opt.h"
+
+#if !NO_SYS /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/api_msg.h"
+#include "lwip/netifapi.h"
+#include "lwip/pbuf.h"
+#include "lwip/api.h"
+#include "lwip/sys.h"
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if LWIP_TCPIP_CORE_LOCKING
+/** The global semaphore to lock the stack. */
+extern sys_sem_t lock_tcpip_core;
+#define LOCK_TCPIP_CORE()     sys_sem_wait(lock_tcpip_core)
+#define UNLOCK_TCPIP_CORE()   sys_sem_signal(lock_tcpip_core)
+#define TCPIP_APIMSG(m)       tcpip_apimsg_lock(m)
+#define TCPIP_APIMSG_ACK(m)
+#define TCPIP_NETIFAPI(m)     tcpip_netifapi_lock(m)
+#define TCPIP_NETIFAPI_ACK(m)
+#else
+#define LOCK_TCPIP_CORE()
+#define UNLOCK_TCPIP_CORE()
+#define TCPIP_APIMSG(m)       tcpip_apimsg(m)
+#define TCPIP_APIMSG_ACK(m)   sys_sem_signal(m->conn->op_completed)
+#define TCPIP_NETIFAPI(m)     tcpip_netifapi(m)
+#define TCPIP_NETIFAPI_ACK(m) sys_sem_signal(m->sem)
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+
+void tcpip_init(void (* tcpip_init_done)(void *), void *arg);
+
+#if LWIP_NETCONN
+err_t tcpip_apimsg(struct api_msg *apimsg);
+#if LWIP_TCPIP_CORE_LOCKING
+err_t tcpip_apimsg_lock(struct api_msg *apimsg);
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+#endif /* LWIP_NETCONN */
+
+err_t tcpip_input(struct pbuf *p, struct netif *inp);
+
+#if LWIP_NETIF_API
+err_t tcpip_netifapi(struct netifapi_msg *netifapimsg);
+#if LWIP_TCPIP_CORE_LOCKING
+err_t tcpip_netifapi_lock(struct netifapi_msg *netifapimsg);
+#endif /* LWIP_TCPIP_CORE_LOCKING */
+#endif /* LWIP_NETIF_API */
+
+err_t tcpip_callback_with_block(void (*f)(void *ctx), void *ctx, u8_t block);
+#define tcpip_callback(f, ctx)              tcpip_callback_with_block(f, ctx, 1)
+
+/* free pbufs or heap memory from another context without blocking */
+err_t pbuf_free_callback(struct pbuf *p);
+err_t mem_free_callback(void *m);
+
+err_t tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg);
+err_t tcpip_untimeout(sys_timeout_handler h, void *arg);
+
+enum tcpip_msg_type {
+#if LWIP_NETCONN
+  TCPIP_MSG_API,
+#endif /* LWIP_NETCONN */
+  TCPIP_MSG_INPKT,
+#if LWIP_NETIF_API
+  TCPIP_MSG_NETIFAPI,
+#endif /* LWIP_NETIF_API */
+  TCPIP_MSG_CALLBACK,
+  TCPIP_MSG_TIMEOUT,
+  TCPIP_MSG_UNTIMEOUT
+};
+
+struct tcpip_msg {
+  enum tcpip_msg_type type;
+  sys_sem_t *sem;
+  union {
+#if LWIP_NETCONN
+    struct api_msg *apimsg;
+#endif /* LWIP_NETCONN */
+#if LWIP_NETIF_API
+    struct netifapi_msg *netifapimsg;
+#endif /* LWIP_NETIF_API */
+    struct {
+      struct pbuf *p;
+      struct netif *netif;
+    } inp;
+    struct {
+      void (*f)(void *ctx);
+      void *ctx;
+    } cb;
+    struct {
+      u32_t msecs;
+      sys_timeout_handler h;
+      void *arg;
+    } tmo;
+  } msg;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* !NO_SYS */
+
+#endif /* __LWIP_TCPIP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/udp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/udp.h
new file mode 100644
index 000000000..d7b2a3820
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/lwip/udp.h
@@ -0,0 +1,150 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __LWIP_UDP_H__
+#define __LWIP_UDP_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_UDP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/netif.h"
+#include "lwip/ip_addr.h"
+#include "lwip/ip.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define UDP_HLEN 8
+
+/* Fields are (of course) in network byte order. */
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct udp_hdr {
+  PACK_STRUCT_FIELD(u16_t src);
+  PACK_STRUCT_FIELD(u16_t dest);  /* src/dest UDP ports */
+  PACK_STRUCT_FIELD(u16_t len);
+  PACK_STRUCT_FIELD(u16_t chksum);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#define UDP_FLAGS_NOCHKSUM 0x01U
+#define UDP_FLAGS_UDPLITE  0x02U
+#define UDP_FLAGS_CONNECTED  0x04U
+
+struct udp_pcb {
+/* Common members of all PCB types */
+  IP_PCB;
+
+/* Protocol specific PCB members */
+
+  struct udp_pcb *next;
+
+  u8_t flags;
+  /* ports are in host byte order */
+  u16_t local_port, remote_port;
+
+#if LWIP_IGMP
+  /* outgoing network interface for multicast packets */
+  struct ip_addr multicast_ip;
+#endif /* LWIP_IGMP */
+
+#if LWIP_UDPLITE
+  /* used for UDP_LITE only */
+  u16_t chksum_len_rx, chksum_len_tx;
+#endif /* LWIP_UDPLITE */
+
+  /* receive callback function
+   * addr and port are in same byte order as in the pcb
+   * The callback is responsible for freeing the pbuf
+   * if it's not used any more.
+   *
+   * @param arg user supplied argument (udp_pcb.recv_arg)
+   * @param pcb the udp_pcb which received data
+   * @param p the packet buffer that was received
+   * @param addr the remote IP address from which the packet was received
+   * @param port the remote port from which the packet was received
+   */
+  void (* recv)(void *arg, struct udp_pcb *pcb, struct pbuf *p,
+    struct ip_addr *addr, u16_t port);
+  /* user-supplied argument for the recv callback */
+  void *recv_arg;  
+};
+/* udp_pcbs export for exernal reference (e.g. SNMP agent) */
+extern struct udp_pcb *udp_pcbs;
+
+/* The following functions is the application layer interface to the
+   UDP code. */
+struct udp_pcb * udp_new        (void);
+void             udp_remove     (struct udp_pcb *pcb);
+err_t            udp_bind       (struct udp_pcb *pcb, struct ip_addr *ipaddr,
+                 u16_t port);
+err_t            udp_connect    (struct udp_pcb *pcb, struct ip_addr *ipaddr,
+                 u16_t port);
+void             udp_disconnect    (struct udp_pcb *pcb);
+void             udp_recv       (struct udp_pcb *pcb,
+         void (* recv)(void *arg, struct udp_pcb *upcb,
+                 struct pbuf *p,
+                 struct ip_addr *addr,
+                 u16_t port),
+         void *recv_arg);
+err_t            udp_sendto_if  (struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *dst_ip, u16_t dst_port, struct netif *netif);
+err_t            udp_sendto     (struct udp_pcb *pcb, struct pbuf *p, struct ip_addr *dst_ip, u16_t dst_port);
+err_t            udp_send       (struct udp_pcb *pcb, struct pbuf *p);
+
+#define          udp_flags(pcb)  ((pcb)->flags)
+#define          udp_setflags(pcb, f)  ((pcb)->flags = (f))
+
+/* The following functions are the lower layer interface to UDP. */
+void             udp_input      (struct pbuf *p, struct netif *inp);
+
+#define udp_init() /* Compatibility define, not init needed. */
+
+#if UDP_DEBUG
+void udp_debug_print(struct udp_hdr *udphdr);
+#else
+#define udp_debug_print(udphdr)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_UDP */
+
+#endif /* __LWIP_UDP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/netif/etharp.h b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/etharp.h
new file mode 100644
index 000000000..db691d91d
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/etharp.h
@@ -0,0 +1,180 @@
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
+ * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#ifndef __NETIF_ETHARP_H__
+#define __NETIF_ETHARP_H__
+
+#include "lwip/opt.h"
+
+#if LWIP_ARP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/pbuf.h"
+#include "lwip/ip_addr.h"
+#include "lwip/netif.h"
+#include "lwip/ip.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef ETH_PAD_SIZE
+#define ETH_PAD_SIZE          0
+#endif
+
+#ifndef ETHARP_HWADDR_LEN
+#define ETHARP_HWADDR_LEN     6
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct eth_addr {
+  PACK_STRUCT_FIELD(u8_t addr[ETHARP_HWADDR_LEN]);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct eth_hdr {
+#if ETH_PAD_SIZE
+  PACK_STRUCT_FIELD(u8_t padding[ETH_PAD_SIZE]);
+#endif
+  PACK_STRUCT_FIELD(struct eth_addr dest);
+  PACK_STRUCT_FIELD(struct eth_addr src);
+  PACK_STRUCT_FIELD(u16_t type);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+/** the ARP message */
+struct etharp_hdr {
+  PACK_STRUCT_FIELD(struct eth_hdr ethhdr);
+  PACK_STRUCT_FIELD(u16_t hwtype);
+  PACK_STRUCT_FIELD(u16_t proto);
+  PACK_STRUCT_FIELD(u16_t _hwlen_protolen);
+  PACK_STRUCT_FIELD(u16_t opcode);
+  PACK_STRUCT_FIELD(struct eth_addr shwaddr);
+  PACK_STRUCT_FIELD(struct ip_addr2 sipaddr);
+  PACK_STRUCT_FIELD(struct eth_addr dhwaddr);
+  PACK_STRUCT_FIELD(struct ip_addr2 dipaddr);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct ethip_hdr {
+  PACK_STRUCT_FIELD(struct eth_hdr eth);
+  PACK_STRUCT_FIELD(struct ip_hdr ip);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+/** 5 seconds period */
+#define ARP_TMR_INTERVAL 5000
+
+#define ETHTYPE_ARP       0x0806
+#define ETHTYPE_IP        0x0800
+#define ETHTYPE_PPPOEDISC 0x8863  /* PPP Over Ethernet Discovery Stage */
+#define ETHTYPE_PPPOE     0x8864  /* PPP Over Ethernet Session Stage */
+
+/** ARP message types (opcodes) */
+#define ARP_REQUEST 1
+#define ARP_REPLY   2
+
+#if ARP_QUEUEING
+/** struct for queueing outgoing packets for unknown address
+  * defined here to be accessed by memp.h
+  */
+struct etharp_q_entry {
+  struct etharp_q_entry *next;
+  struct pbuf *p;
+};
+#endif /* ARP_QUEUEING */
+
+#define etharp_init() /* Compatibility define, not init needed. */
+void etharp_tmr(void);
+s8_t etharp_find_addr(struct netif *netif, struct ip_addr *ipaddr,
+         struct eth_addr **eth_ret, struct ip_addr **ip_ret);
+void etharp_ip_input(struct netif *netif, struct pbuf *p);
+void etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr,
+         struct pbuf *p);
+err_t etharp_output(struct netif *netif, struct pbuf *q, struct ip_addr *ipaddr);
+err_t etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q);
+err_t etharp_request(struct netif *netif, struct ip_addr *ipaddr);
+/** For Ethernet network interfaces, we might want to send "gratuitous ARP";
+ *  this is an ARP packet sent by a node in order to spontaneously cause other
+ *  nodes to update an entry in their ARP cache.
+ *  From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
+#define etharp_gratuitous(netif) etharp_request((netif), &(netif)->ip_addr)
+
+err_t ethernet_input(struct pbuf *p, struct netif *netif);
+
+#if LWIP_AUTOIP
+err_t etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
+                 const struct eth_addr *ethdst_addr,
+                 const struct eth_addr *hwsrc_addr, const struct ip_addr *ipsrc_addr,
+                 const struct eth_addr *hwdst_addr, const struct ip_addr *ipdst_addr,
+                 const u16_t opcode);
+#endif /* LWIP_AUTOIP */
+
+#define eth_addr_cmp(addr1, addr2) (memcmp((addr1)->addr, (addr2)->addr, ETHARP_HWADDR_LEN) == 0)
+
+extern const struct eth_addr ethbroadcast, ethzero;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LWIP_ARP */
+
+#endif /* __NETIF_ARP_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/netif/loopif.h b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/loopif.h
new file mode 100644
index 000000000..304af4b39
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/loopif.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __NETIF_LOOPIF_H__
+#define __NETIF_LOOPIF_H__
+
+#include "lwip/opt.h"
+#include "lwip/netif.h"
+#include "lwip/err.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
+#define loopif_poll netif_poll
+#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
+
+err_t loopif_init(struct netif *netif);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __NETIF_LOOPIF_H__ */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/netif/ppp_oe.h b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/ppp_oe.h
new file mode 100644
index 000000000..3aa55aec7
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/ppp_oe.h
@@ -0,0 +1,161 @@
+/*****************************************************************************
+* ppp_oe.h - PPP Over Ethernet implementation for lwIP.
+*
+* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 06-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+*****************************************************************************/
+
+
+
+/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
+
+/*-
+ * Copyright (c) 2002 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Martin Husemann <martin@NetBSD.org>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef PPP_OE_H
+#define PPP_OE_H
+
+#include "lwip/opt.h"
+
+#if PPPOE_SUPPORT > 0
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct pppoehdr {
+	PACK_STRUCT_FIELD(u8_t vertype);
+	PACK_STRUCT_FIELD(u8_t code);
+	PACK_STRUCT_FIELD(u16_t session);
+	PACK_STRUCT_FIELD(u16_t plen);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/bpstruct.h"
+#endif
+PACK_STRUCT_BEGIN
+struct pppoetag {
+	PACK_STRUCT_FIELD(u16_t tag);
+	PACK_STRUCT_FIELD(u16_t len);
+} PACK_STRUCT_STRUCT;
+PACK_STRUCT_END
+#ifdef PACK_STRUCT_USE_INCLUDES
+#  include "arch/epstruct.h"
+#endif
+
+
+#define PPPOE_STATE_INITIAL	0
+#define PPPOE_STATE_PADI_SENT	1
+#define	PPPOE_STATE_PADR_SENT	2
+#define	PPPOE_STATE_SESSION	3
+#define	PPPOE_STATE_CLOSING	4
+/* passive */
+#define	PPPOE_STATE_PADO_SENT	1
+
+#define PPPOE_HEADERLEN	sizeof(struct pppoehdr)
+#define	PPPOE_VERTYPE	0x11	/* VER=1, TYPE = 1 */
+
+#define	PPPOE_TAG_EOL		0x0000		/* end of list */
+#define	PPPOE_TAG_SNAME		0x0101		/* service name */
+#define	PPPOE_TAG_ACNAME	0x0102		/* access concentrator name */
+#define	PPPOE_TAG_HUNIQUE	0x0103		/* host unique */
+#define	PPPOE_TAG_ACCOOKIE	0x0104		/* AC cookie */
+#define	PPPOE_TAG_VENDOR	0x0105		/* vendor specific */
+#define	PPPOE_TAG_RELAYSID	0x0110		/* relay session id */
+#define	PPPOE_TAG_SNAME_ERR	0x0201		/* service name error */
+#define	PPPOE_TAG_ACSYS_ERR	0x0202		/* AC system error */
+#define	PPPOE_TAG_GENERIC_ERR	0x0203		/* gerneric error */
+
+#define PPPOE_CODE_PADI		0x09		/* Active Discovery Initiation */
+#define	PPPOE_CODE_PADO		0x07		/* Active Discovery Offer */
+#define	PPPOE_CODE_PADR		0x19		/* Active Discovery Request */
+#define	PPPOE_CODE_PADS		0x65		/* Active Discovery Session confirmation */
+#define	PPPOE_CODE_PADT		0xA7		/* Active Discovery Terminate */
+
+#ifndef ETHERMTU
+#define ETHERMTU 1500
+#endif
+
+/* two byte PPP protocol discriminator, then IP data */
+#define	PPPOE_MAXMTU	(ETHERMTU-PPPOE_HEADERLEN-2)
+
+struct pppoe_softc;
+
+
+void pppoe_init(void);
+
+err_t pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr);
+err_t pppoe_destroy(struct netif *ifp);
+
+int pppoe_connect(struct pppoe_softc *sc);
+void pppoe_disconnect(struct pppoe_softc *sc);
+
+void pppoe_disc_input(struct netif *netif, struct pbuf *p);
+void pppoe_data_input(struct netif *netif, struct pbuf *p);
+
+err_t pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb);
+
+extern int pppoe_hdrlen;
+
+#endif /* PPPOE_SUPPORT */
+
+#endif /* PPP_OE_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/include/netif/slipif.h b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/slipif.h
new file mode 100644
index 000000000..aa08ada4a
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/include/netif/slipif.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2001, Swedish Institute of Computer Science.
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#ifndef __NETIF_SLIPIF_H__
+#define __NETIF_SLIPIF_H__
+
+#include "lwip/netif.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+err_t slipif_init(struct netif * netif);
+
+#ifdef __cplusplus
+}
+#endif
+ 
+#endif 
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/FILES b/firmware/x300/lwip/lwip-1.3.1/src/netif/FILES
new file mode 100644
index 000000000..1c4f5928d
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/FILES
@@ -0,0 +1,25 @@
+This directory contains generic network interface device drivers that
+do not contain any hardware or architecture specific code. The files
+are:
+
+etharp.c
+          Implements the ARP (Address Resolution Protocol) over
+          Ethernet. The code in this file should be used together with
+          Ethernet device drivers. Note that this module has been
+          largely made Ethernet independent so you should be able to
+          adapt this for other link layers (such as Firewire).
+
+ethernetif.c
+          An example of how an Ethernet device driver could look. This
+          file can be used as a "skeleton" for developing new Ethernet
+          network device drivers. It uses the etharp.c ARP code.
+
+loopif.c
+          A "loopback" network interface driver. It requires configuration
+          through the define LWIP_LOOPIF_MULTITHREADING (see opt.h).
+
+slipif.c
+          A generic implementation of the SLIP (Serial Line IP)
+          protocol. It requires a sio (serial I/O) module to work.
+
+ppp/      Point-to-Point Protocol stack
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/etharp.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/etharp.c
new file mode 100644
index 000000000..73ea21173
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/etharp.c
@@ -0,0 +1,1185 @@
+/**
+ * @file
+ * Address Resolution Protocol module for IP over Ethernet
+ *
+ * Functionally, ARP is divided into two parts. The first maps an IP address
+ * to a physical address when sending a packet, and the second part answers
+ * requests from other machines for our physical address.
+ *
+ * This implementation complies with RFC 826 (Ethernet ARP). It supports
+ * Gratuitious ARP from RFC3220 (IP Mobility Support for IPv4) section 4.6
+ * if an interface calls etharp_gratuitous(our_netif) upon address change.
+ */
+
+/*
+ * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
+ * Copyright (c) 2003-2004 Leon Woestenberg <leon.woestenberg@axon.tv>
+ * Copyright (c) 2003-2004 Axon Digital Design B.V., The Netherlands.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ *
+ */
+ 
+#include "lwip/opt.h"
+
+#if LWIP_ARP /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/inet.h"
+#include "lwip/ip.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+#include "lwip/dhcp.h"
+#include "lwip/autoip.h"
+#include "netif/etharp.h"
+
+#if PPPOE_SUPPORT
+#include "netif/ppp_oe.h"
+#endif /* PPPOE_SUPPORT */
+
+#include <string.h>
+
+/** the time an ARP entry stays valid after its last update,
+ *  for ARP_TMR_INTERVAL = 5000, this is
+ *  (240 * 5) seconds = 20 minutes.
+ */
+#define ARP_MAXAGE 240
+/** the time an ARP entry stays pending after first request,
+ *  for ARP_TMR_INTERVAL = 5000, this is
+ *  (2 * 5) seconds = 10 seconds.
+ * 
+ *  @internal Keep this number at least 2, otherwise it might
+ *  run out instantly if the timeout occurs directly after a request.
+ */
+#define ARP_MAXPENDING 2
+
+#define HWTYPE_ETHERNET 1
+
+#define ARPH_HWLEN(hdr) (ntohs((hdr)->_hwlen_protolen) >> 8)
+#define ARPH_PROTOLEN(hdr) (ntohs((hdr)->_hwlen_protolen) & 0xff)
+
+#define ARPH_HWLEN_SET(hdr, len) (hdr)->_hwlen_protolen = htons(ARPH_PROTOLEN(hdr) | ((len) << 8))
+#define ARPH_PROTOLEN_SET(hdr, len) (hdr)->_hwlen_protolen = htons((len) | (ARPH_HWLEN(hdr) << 8))
+
+enum etharp_state {
+  ETHARP_STATE_EMPTY = 0,
+  ETHARP_STATE_PENDING,
+  ETHARP_STATE_STABLE
+};
+
+struct etharp_entry {
+#if ARP_QUEUEING
+  /** 
+   * Pointer to queue of pending outgoing packets on this ARP entry.
+   */
+  struct etharp_q_entry *q;
+#endif
+  struct ip_addr ipaddr;
+  struct eth_addr ethaddr;
+  enum etharp_state state;
+  u8_t ctime;
+  struct netif *netif;
+};
+
+const struct eth_addr ethbroadcast = {{0xff,0xff,0xff,0xff,0xff,0xff}};
+const struct eth_addr ethzero = {{0,0,0,0,0,0}};
+static struct etharp_entry arp_table[ARP_TABLE_SIZE];
+#if !LWIP_NETIF_HWADDRHINT
+static u8_t etharp_cached_entry;
+#endif
+
+/**
+ * Try hard to create a new entry - we want the IP address to appear in
+ * the cache (even if this means removing an active entry or so). */
+#define ETHARP_TRY_HARD 1
+#define ETHARP_FIND_ONLY  2
+
+#if LWIP_NETIF_HWADDRHINT
+#define NETIF_SET_HINT(netif, hint)  if (((netif) != NULL) && ((netif)->addr_hint != NULL))  \
+                                      *((netif)->addr_hint) = (hint);
+static s8_t find_entry(struct ip_addr *ipaddr, u8_t flags, struct netif *netif);
+#else /* LWIP_NETIF_HWADDRHINT */
+static s8_t find_entry(struct ip_addr *ipaddr, u8_t flags);
+#endif /* LWIP_NETIF_HWADDRHINT */
+
+static err_t update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *ethaddr, u8_t flags);
+
+
+/* Some checks, instead of etharp_init(): */
+#if (LWIP_ARP && (ARP_TABLE_SIZE > 0x7f))
+  #error "If you want to use ARP, ARP_TABLE_SIZE must fit in an s8_t, so, you have to reduce it in your lwipopts.h"
+#endif
+
+
+#if ARP_QUEUEING
+/**
+ * Free a complete queue of etharp entries
+ *
+ * @param q a qeueue of etharp_q_entry's to free
+ */
+static void
+free_etharp_q(struct etharp_q_entry *q)
+{
+  struct etharp_q_entry *r;
+  LWIP_ASSERT("q != NULL", q != NULL);
+  LWIP_ASSERT("q->p != NULL", q->p != NULL);
+  while (q) {
+    r = q;
+    q = q->next;
+    LWIP_ASSERT("r->p != NULL", (r->p != NULL));
+    pbuf_free(r->p);
+    memp_free(MEMP_ARP_QUEUE, r);
+  }
+}
+#endif
+
+/**
+ * Clears expired entries in the ARP table.
+ *
+ * This function should be called every ETHARP_TMR_INTERVAL microseconds (5 seconds),
+ * in order to expire entries in the ARP table.
+ */
+void
+etharp_tmr(void)
+{
+  u8_t i;
+
+  LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer\n"));
+  /* remove expired entries from the ARP table */
+  for (i = 0; i < ARP_TABLE_SIZE; ++i) {
+    arp_table[i].ctime++;
+    if (((arp_table[i].state == ETHARP_STATE_STABLE) &&
+         (arp_table[i].ctime >= ARP_MAXAGE)) ||
+        ((arp_table[i].state == ETHARP_STATE_PENDING)  &&
+         (arp_table[i].ctime >= ARP_MAXPENDING))) {
+         /* pending or stable entry has become old! */
+      LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer: expired %s entry %"U16_F".\n",
+           arp_table[i].state == ETHARP_STATE_STABLE ? "stable" : "pending", (u16_t)i));
+      /* clean up entries that have just been expired */
+      /* remove from SNMP ARP index tree */
+      snmp_delete_arpidx_tree(arp_table[i].netif, &arp_table[i].ipaddr);
+#if ARP_QUEUEING
+      /* and empty packet queue */
+      if (arp_table[i].q != NULL) {
+        /* remove all queued packets */
+        LWIP_DEBUGF(ETHARP_DEBUG, ("etharp_timer: freeing entry %"U16_F", packet queue %p.\n", (u16_t)i, (void *)(arp_table[i].q)));
+        free_etharp_q(arp_table[i].q);
+        arp_table[i].q = NULL;
+      }
+#endif
+      /* recycle entry for re-use */      
+      arp_table[i].state = ETHARP_STATE_EMPTY;
+    }
+#if ARP_QUEUEING
+    /* still pending entry? (not expired) */
+    if (arp_table[i].state == ETHARP_STATE_PENDING) {
+        /* resend an ARP query here? */
+    }
+#endif
+  }
+}
+
+/**
+ * Search the ARP table for a matching or new entry.
+ * 
+ * If an IP address is given, return a pending or stable ARP entry that matches
+ * the address. If no match is found, create a new entry with this address set,
+ * but in state ETHARP_EMPTY. The caller must check and possibly change the
+ * state of the returned entry.
+ * 
+ * If ipaddr is NULL, return a initialized new entry in state ETHARP_EMPTY.
+ * 
+ * In all cases, attempt to create new entries from an empty entry. If no
+ * empty entries are available and ETHARP_TRY_HARD flag is set, recycle
+ * old entries. Heuristic choose the least important entry for recycling.
+ *
+ * @param ipaddr IP address to find in ARP cache, or to add if not found.
+ * @param flags
+ * - ETHARP_TRY_HARD: Try hard to create a entry by allowing recycling of
+ * active (stable or pending) entries.
+ *  
+ * @return The ARP entry index that matched or is created, ERR_MEM if no
+ * entry is found or could be recycled.
+ */
+static s8_t
+#if LWIP_NETIF_HWADDRHINT
+find_entry(struct ip_addr *ipaddr, u8_t flags, struct netif *netif)
+#else /* LWIP_NETIF_HWADDRHINT */
+find_entry(struct ip_addr *ipaddr, u8_t flags)
+#endif /* LWIP_NETIF_HWADDRHINT */
+{
+  s8_t old_pending = ARP_TABLE_SIZE, old_stable = ARP_TABLE_SIZE;
+  s8_t empty = ARP_TABLE_SIZE;
+  u8_t i = 0, age_pending = 0, age_stable = 0;
+#if ARP_QUEUEING
+  /* oldest entry with packets on queue */
+  s8_t old_queue = ARP_TABLE_SIZE;
+  /* its age */
+  u8_t age_queue = 0;
+#endif
+
+  /* First, test if the last call to this function asked for the
+   * same address. If so, we're really fast! */
+  if (ipaddr) {
+    /* ipaddr to search for was given */
+#if LWIP_NETIF_HWADDRHINT
+    if ((netif != NULL) && (netif->addr_hint != NULL)) {
+      /* per-pcb cached entry was given */
+      u8_t per_pcb_cache = *(netif->addr_hint);
+      if ((per_pcb_cache < ARP_TABLE_SIZE) && arp_table[per_pcb_cache].state == ETHARP_STATE_STABLE) {
+        /* the per-pcb-cached entry is stable */
+        if (ip_addr_cmp(ipaddr, &arp_table[per_pcb_cache].ipaddr)) {
+          /* per-pcb cached entry was the right one! */
+          ETHARP_STATS_INC(etharp.cachehit);
+          return per_pcb_cache;
+        }
+      }
+    }
+#else /* #if LWIP_NETIF_HWADDRHINT */
+    if (arp_table[etharp_cached_entry].state == ETHARP_STATE_STABLE) {
+      /* the cached entry is stable */
+      if (ip_addr_cmp(ipaddr, &arp_table[etharp_cached_entry].ipaddr)) {
+        /* cached entry was the right one! */
+        ETHARP_STATS_INC(etharp.cachehit);
+        return etharp_cached_entry;
+      }
+    }
+#endif /* #if LWIP_NETIF_HWADDRHINT */
+  }
+
+  /**
+   * a) do a search through the cache, remember candidates
+   * b) select candidate entry
+   * c) create new entry
+   */
+
+  /* a) in a single search sweep, do all of this
+   * 1) remember the first empty entry (if any)
+   * 2) remember the oldest stable entry (if any)
+   * 3) remember the oldest pending entry without queued packets (if any)
+   * 4) remember the oldest pending entry with queued packets (if any)
+   * 5) search for a matching IP entry, either pending or stable
+   *    until 5 matches, or all entries are searched for.
+   */
+
+  for (i = 0; i < ARP_TABLE_SIZE; ++i) {
+    /* no empty entry found yet and now we do find one? */
+    if ((empty == ARP_TABLE_SIZE) && (arp_table[i].state == ETHARP_STATE_EMPTY)) {
+      LWIP_DEBUGF(ETHARP_DEBUG, ("find_entry: found empty entry %"U16_F"\n", (u16_t)i));
+      /* remember first empty entry */
+      empty = i;
+    }
+    /* pending entry? */
+    else if (arp_table[i].state == ETHARP_STATE_PENDING) {
+      /* if given, does IP address match IP address in ARP entry? */
+      if (ipaddr && ip_addr_cmp(ipaddr, &arp_table[i].ipaddr)) {
+        LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("find_entry: found matching pending entry %"U16_F"\n", (u16_t)i));
+        /* found exact IP address match, simply bail out */
+#if LWIP_NETIF_HWADDRHINT
+        NETIF_SET_HINT(netif, i);
+#else /* #if LWIP_NETIF_HWADDRHINT */
+        etharp_cached_entry = i;
+#endif /* #if LWIP_NETIF_HWADDRHINT */
+        return i;
+#if ARP_QUEUEING
+      /* pending with queued packets? */
+      } else if (arp_table[i].q != NULL) {
+        if (arp_table[i].ctime >= age_queue) {
+          old_queue = i;
+          age_queue = arp_table[i].ctime;
+        }
+#endif
+      /* pending without queued packets? */
+      } else {
+        if (arp_table[i].ctime >= age_pending) {
+          old_pending = i;
+          age_pending = arp_table[i].ctime;
+        }
+      }        
+    }
+    /* stable entry? */
+    else if (arp_table[i].state == ETHARP_STATE_STABLE) {
+      /* if given, does IP address match IP address in ARP entry? */
+      if (ipaddr && ip_addr_cmp(ipaddr, &arp_table[i].ipaddr)) {
+        LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("find_entry: found matching stable entry %"U16_F"\n", (u16_t)i));
+        /* found exact IP address match, simply bail out */
+#if LWIP_NETIF_HWADDRHINT
+        NETIF_SET_HINT(netif, i);
+#else /* #if LWIP_NETIF_HWADDRHINT */
+        etharp_cached_entry = i;
+#endif /* #if LWIP_NETIF_HWADDRHINT */
+        return i;
+      /* remember entry with oldest stable entry in oldest, its age in maxtime */
+      } else if (arp_table[i].ctime >= age_stable) {
+        old_stable = i;
+        age_stable = arp_table[i].ctime;
+      }
+    }
+  }
+  /* { we have no match } => try to create a new entry */
+   
+  /* no empty entry found and not allowed to recycle? */
+  if (((empty == ARP_TABLE_SIZE) && ((flags & ETHARP_TRY_HARD) == 0))
+      /* or don't create new entry, only search? */
+      || ((flags & ETHARP_FIND_ONLY) != 0)) {
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("find_entry: no empty entry found and not allowed to recycle\n"));
+    return (s8_t)ERR_MEM;
+  }
+  
+  /* b) choose the least destructive entry to recycle:
+   * 1) empty entry
+   * 2) oldest stable entry
+   * 3) oldest pending entry without queued packets
+   * 4) oldest pending entry with queued packets
+   * 
+   * { ETHARP_TRY_HARD is set at this point }
+   */ 
+
+  /* 1) empty entry available? */
+  if (empty < ARP_TABLE_SIZE) {
+    i = empty;
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("find_entry: selecting empty entry %"U16_F"\n", (u16_t)i));
+  }
+  /* 2) found recyclable stable entry? */
+  else if (old_stable < ARP_TABLE_SIZE) {
+    /* recycle oldest stable*/
+    i = old_stable;
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("find_entry: selecting oldest stable entry %"U16_F"\n", (u16_t)i));
+#if ARP_QUEUEING
+    /* no queued packets should exist on stable entries */
+    LWIP_ASSERT("arp_table[i].q == NULL", arp_table[i].q == NULL);
+#endif
+  /* 3) found recyclable pending entry without queued packets? */
+  } else if (old_pending < ARP_TABLE_SIZE) {
+    /* recycle oldest pending */
+    i = old_pending;
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("find_entry: selecting oldest pending entry %"U16_F" (without queue)\n", (u16_t)i));
+#if ARP_QUEUEING
+  /* 4) found recyclable pending entry with queued packets? */
+  } else if (old_queue < ARP_TABLE_SIZE) {
+    /* recycle oldest pending */
+    i = old_queue;
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("find_entry: selecting oldest pending entry %"U16_F", freeing packet queue %p\n", (u16_t)i, (void *)(arp_table[i].q)));
+    free_etharp_q(arp_table[i].q);
+    arp_table[i].q = NULL;
+#endif
+    /* no empty or recyclable entries found */
+  } else {
+    return (s8_t)ERR_MEM;
+  }
+
+  /* { empty or recyclable entry found } */
+  LWIP_ASSERT("i < ARP_TABLE_SIZE", i < ARP_TABLE_SIZE);
+
+  if (arp_table[i].state != ETHARP_STATE_EMPTY)
+  {
+    snmp_delete_arpidx_tree(arp_table[i].netif, &arp_table[i].ipaddr);
+  }
+  /* recycle entry (no-op for an already empty entry) */
+  arp_table[i].state = ETHARP_STATE_EMPTY;
+
+  /* IP address given? */
+  if (ipaddr != NULL) {
+    /* set IP address */
+    ip_addr_set(&arp_table[i].ipaddr, ipaddr);
+  }
+  arp_table[i].ctime = 0;
+#if LWIP_NETIF_HWADDRHINT
+  NETIF_SET_HINT(netif, i);
+#else /* #if LWIP_NETIF_HWADDRHINT */
+  etharp_cached_entry = i;
+#endif /* #if LWIP_NETIF_HWADDRHINT */
+  return (err_t)i;
+}
+
+/**
+ * Send an IP packet on the network using netif->linkoutput
+ * The ethernet header is filled in before sending.
+ *
+ * @params netif the lwIP network interface on which to send the packet
+ * @params p the packet to send, p->payload pointing to the (uninitialized) ethernet header
+ * @params src the source MAC address to be copied into the ethernet header
+ * @params dst the destination MAC address to be copied into the ethernet header
+ * @return ERR_OK if the packet was sent, any other err_t on failure
+ */
+static err_t
+etharp_send_ip(struct netif *netif, struct pbuf *p, struct eth_addr *src, struct eth_addr *dst)
+{
+  struct eth_hdr *ethhdr = p->payload;
+  u8_t k;
+
+  LWIP_ASSERT("netif->hwaddr_len must be the same as ETHARP_HWADDR_LEN for etharp!",
+              (netif->hwaddr_len == ETHARP_HWADDR_LEN));
+  k = ETHARP_HWADDR_LEN;
+  while(k > 0) {
+    k--;
+    ethhdr->dest.addr[k] = dst->addr[k];
+    ethhdr->src.addr[k]  = src->addr[k];
+  }
+  ethhdr->type = htons(ETHTYPE_IP);
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_send_ip: sending packet %p\n", (void *)p));
+  /* send the packet */
+  return netif->linkoutput(netif, p);
+}
+
+/**
+ * Update (or insert) a IP/MAC address pair in the ARP cache.
+ *
+ * If a pending entry is resolved, any queued packets will be sent
+ * at this point.
+ * 
+ * @param ipaddr IP address of the inserted ARP entry.
+ * @param ethaddr Ethernet address of the inserted ARP entry.
+ * @param flags Defines behaviour:
+ * - ETHARP_TRY_HARD Allows ARP to insert this as a new item. If not specified,
+ * only existing ARP entries will be updated.
+ *
+ * @return
+ * - ERR_OK Succesfully updated ARP cache.
+ * - ERR_MEM If we could not add a new ARP entry when ETHARP_TRY_HARD was set.
+ * - ERR_ARG Non-unicast address given, those will not appear in ARP cache.
+ *
+ * @see pbuf_free()
+ */
+static err_t
+update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *ethaddr, u8_t flags)
+{
+  s8_t i;
+  u8_t k;
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | 3, ("update_arp_entry()\n"));
+  LWIP_ASSERT("netif->hwaddr_len == ETHARP_HWADDR_LEN", netif->hwaddr_len == ETHARP_HWADDR_LEN);
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("update_arp_entry: %"U16_F".%"U16_F".%"U16_F".%"U16_F" - %02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F"\n",
+                                        ip4_addr1(ipaddr), ip4_addr2(ipaddr), ip4_addr3(ipaddr), ip4_addr4(ipaddr), 
+                                        ethaddr->addr[0], ethaddr->addr[1], ethaddr->addr[2],
+                                        ethaddr->addr[3], ethaddr->addr[4], ethaddr->addr[5]));
+  /* non-unicast address? */
+  if (ip_addr_isany(ipaddr) ||
+      ip_addr_isbroadcast(ipaddr, netif) ||
+      ip_addr_ismulticast(ipaddr)) {
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("update_arp_entry: will not add non-unicast IP address to ARP cache\n"));
+    return ERR_ARG;
+  }
+  /* find or create ARP entry */
+#if LWIP_NETIF_HWADDRHINT
+  i = find_entry(ipaddr, flags, netif);
+#else /* LWIP_NETIF_HWADDRHINT */
+  i = find_entry(ipaddr, flags);
+#endif /* LWIP_NETIF_HWADDRHINT */
+  /* bail out if no entry could be found */
+  if (i < 0)
+    return (err_t)i;
+  
+  /* mark it stable */
+  arp_table[i].state = ETHARP_STATE_STABLE;
+  /* record network interface */
+  arp_table[i].netif = netif;
+
+  /* insert in SNMP ARP index tree */
+  snmp_insert_arpidx_tree(netif, &arp_table[i].ipaddr);
+
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("update_arp_entry: updating stable entry %"S16_F"\n", (s16_t)i));
+  /* update address */
+  k = ETHARP_HWADDR_LEN;
+  while (k > 0) {
+    k--;
+    arp_table[i].ethaddr.addr[k] = ethaddr->addr[k];
+  }
+  /* reset time stamp */
+  arp_table[i].ctime = 0;
+#if ARP_QUEUEING
+  /* this is where we will send out queued packets! */
+  while (arp_table[i].q != NULL) {
+    struct pbuf *p;
+    /* remember remainder of queue */
+    struct etharp_q_entry *q = arp_table[i].q;
+    /* pop first item off the queue */
+    arp_table[i].q = q->next;
+    /* get the packet pointer */
+    p = q->p;
+    /* now queue entry can be freed */
+    memp_free(MEMP_ARP_QUEUE, q);
+    /* send the queued IP packet */
+    etharp_send_ip(netif, p, (struct eth_addr*)(netif->hwaddr), ethaddr);
+    /* free the queued IP packet */
+    pbuf_free(p);
+  }
+#endif
+  return ERR_OK;
+}
+
+/**
+ * Finds (stable) ethernet/IP address pair from ARP table
+ * using interface and IP address index.
+ * @note the addresses in the ARP table are in network order!
+ *
+ * @param netif points to interface index
+ * @param ipaddr points to the (network order) IP address index
+ * @param eth_ret points to return pointer
+ * @param ip_ret points to return pointer
+ * @return table index if found, -1 otherwise
+ */
+s8_t
+etharp_find_addr(struct netif *netif, struct ip_addr *ipaddr,
+         struct eth_addr **eth_ret, struct ip_addr **ip_ret)
+{
+  s8_t i;
+
+  LWIP_UNUSED_ARG(netif);
+
+#if LWIP_NETIF_HWADDRHINT
+  i = find_entry(ipaddr, ETHARP_FIND_ONLY, NULL);
+#else /* LWIP_NETIF_HWADDRHINT */
+  i = find_entry(ipaddr, ETHARP_FIND_ONLY);
+#endif /* LWIP_NETIF_HWADDRHINT */
+  if((i >= 0) && arp_table[i].state == ETHARP_STATE_STABLE) {
+      *eth_ret = &arp_table[i].ethaddr;
+      *ip_ret = &arp_table[i].ipaddr;
+      return i;
+  }
+  return -1;
+}
+
+/**
+ * Updates the ARP table using the given IP packet.
+ *
+ * Uses the incoming IP packet's source address to update the
+ * ARP cache for the local network. The function does not alter
+ * or free the packet. This function must be called before the
+ * packet p is passed to the IP layer.
+ *
+ * @param netif The lwIP network interface on which the IP packet pbuf arrived.
+ * @param p The IP packet that arrived on netif.
+ *
+ * @return NULL
+ *
+ * @see pbuf_free()
+ */
+void
+etharp_ip_input(struct netif *netif, struct pbuf *p)
+{
+  struct ethip_hdr *hdr;
+  LWIP_ERROR("netif != NULL", (netif != NULL), return;);
+  /* Only insert an entry if the source IP address of the
+     incoming IP packet comes from a host on the local network. */
+  hdr = p->payload;
+  /* source is not on the local network? */
+  if (!ip_addr_netcmp(&(hdr->ip.src), &(netif->ip_addr), &(netif->netmask))) {
+    /* do nothing */
+    return;
+  }
+
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_ip_input: updating ETHARP table.\n"));
+  /* update ARP table */
+  /* @todo We could use ETHARP_TRY_HARD if we think we are going to talk
+   * back soon (for example, if the destination IP address is ours. */
+  update_arp_entry(netif, &(hdr->ip.src), &(hdr->eth.src), 0);
+}
+
+
+/**
+ * Responds to ARP requests to us. Upon ARP replies to us, add entry to cache  
+ * send out queued IP packets. Updates cache with snooped address pairs.
+ *
+ * Should be called for incoming ARP packets. The pbuf in the argument
+ * is freed by this function.
+ *
+ * @param netif The lwIP network interface on which the ARP packet pbuf arrived.
+ * @param ethaddr Ethernet address of netif.
+ * @param p The ARP packet that arrived on netif. Is freed by this function.
+ *
+ * @return NULL
+ *
+ * @see pbuf_free()
+ */
+void
+etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
+{
+  struct etharp_hdr *hdr;
+  /* these are aligned properly, whereas the ARP header fields might not be */
+  struct ip_addr sipaddr, dipaddr;
+  u8_t i;
+  u8_t for_us;
+#if LWIP_AUTOIP
+  const u8_t * ethdst_hwaddr;
+#endif /* LWIP_AUTOIP */
+
+  LWIP_ERROR("netif != NULL", (netif != NULL), return;);
+  
+  /* drop short ARP packets: we have to check for p->len instead of p->tot_len here
+     since a struct etharp_hdr is pointed to p->payload, so it musn't be chained! */
+  if (p->len < sizeof(struct etharp_hdr)) {
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | 1, ("etharp_arp_input: packet dropped, too short (%"S16_F"/%"S16_F")\n", p->tot_len, (s16_t)sizeof(struct etharp_hdr)));
+    ETHARP_STATS_INC(etharp.lenerr);
+    ETHARP_STATS_INC(etharp.drop);
+    pbuf_free(p);
+    return;
+  }
+
+  hdr = p->payload;
+
+  /* RFC 826 "Packet Reception": */
+  if ((hdr->hwtype != htons(HWTYPE_ETHERNET)) ||
+      (hdr->_hwlen_protolen != htons((ETHARP_HWADDR_LEN << 8) | sizeof(struct ip_addr))) ||
+      (hdr->proto != htons(ETHTYPE_IP)) ||
+      (hdr->ethhdr.type != htons(ETHTYPE_ARP)))  {
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | 1,
+      ("etharp_arp_input: packet dropped, wrong hw type, hwlen, proto, protolen or ethernet type (%"U16_F"/%"U16_F"/%"U16_F"/%"U16_F"/%"U16_F")\n",
+      hdr->hwtype, ARPH_HWLEN(hdr), hdr->proto, ARPH_PROTOLEN(hdr), hdr->ethhdr.type));
+    ETHARP_STATS_INC(etharp.proterr);
+    ETHARP_STATS_INC(etharp.drop);
+    pbuf_free(p);
+    return;
+  }
+  ETHARP_STATS_INC(etharp.recv);
+
+#if LWIP_AUTOIP
+  /* We have to check if a host already has configured our random
+   * created link local address and continously check if there is
+   * a host with this IP-address so we can detect collisions */
+  autoip_arp_reply(netif, hdr);
+#endif /* LWIP_AUTOIP */
+
+  /* Copy struct ip_addr2 to aligned ip_addr, to support compilers without
+   * structure packing (not using structure copy which breaks strict-aliasing rules). */
+  SMEMCPY(&sipaddr, &hdr->sipaddr, sizeof(sipaddr));
+  SMEMCPY(&dipaddr, &hdr->dipaddr, sizeof(dipaddr));
+
+  /* this interface is not configured? */
+  if (netif->ip_addr.addr == 0) {
+    for_us = 0;
+  } else {
+    /* ARP packet directed to us? */
+    for_us = ip_addr_cmp(&dipaddr, &(netif->ip_addr));
+  }
+
+  /* ARP message directed to us? */
+  if (for_us) {
+    /* add IP address in ARP cache; assume requester wants to talk to us.
+     * can result in directly sending the queued packets for this host. */
+    update_arp_entry(netif, &sipaddr, &(hdr->shwaddr), ETHARP_TRY_HARD);
+  /* ARP message not directed to us? */
+  } else {
+    /* update the source IP address in the cache, if present */
+    update_arp_entry(netif, &sipaddr, &(hdr->shwaddr), 0);
+  }
+
+  /* now act on the message itself */
+  switch (htons(hdr->opcode)) {
+  /* ARP request? */
+  case ARP_REQUEST:
+    /* ARP request. If it asked for our address, we send out a
+     * reply. In any case, we time-stamp any existing ARP entry,
+     * and possiby send out an IP packet that was queued on it. */
+
+    LWIP_DEBUGF (ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_arp_input: incoming ARP request\n"));
+    /* ARP request for our address? */
+    if (for_us) {
+
+      LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_arp_input: replying to ARP request for our IP address\n"));
+      /* Re-use pbuf to send ARP reply.
+         Since we are re-using an existing pbuf, we can't call etharp_raw since
+         that would allocate a new pbuf. */
+      hdr->opcode = htons(ARP_REPLY);
+
+      hdr->dipaddr = hdr->sipaddr;
+      SMEMCPY(&hdr->sipaddr, &netif->ip_addr, sizeof(hdr->sipaddr));
+
+      LWIP_ASSERT("netif->hwaddr_len must be the same as ETHARP_HWADDR_LEN for etharp!",
+                  (netif->hwaddr_len == ETHARP_HWADDR_LEN));
+      i = ETHARP_HWADDR_LEN;
+#if LWIP_AUTOIP
+      /* If we are using Link-Local, ARP packets must be broadcast on the
+       * link layer. (See RFC3927 Section 2.5) */
+      ethdst_hwaddr = ((netif->autoip != NULL) && (netif->autoip->state != AUTOIP_STATE_OFF)) ? (u8_t*)(ethbroadcast.addr) : hdr->shwaddr.addr;
+#endif /* LWIP_AUTOIP */
+
+      while(i > 0) {
+        i--;
+        hdr->dhwaddr.addr[i] = hdr->shwaddr.addr[i];
+#if LWIP_AUTOIP
+        hdr->ethhdr.dest.addr[i] = ethdst_hwaddr[i];
+#else  /* LWIP_AUTOIP */
+        hdr->ethhdr.dest.addr[i] = hdr->shwaddr.addr[i];
+#endif /* LWIP_AUTOIP */
+        hdr->shwaddr.addr[i] = ethaddr->addr[i];
+        hdr->ethhdr.src.addr[i] = ethaddr->addr[i];
+      }
+
+      /* hwtype, hwaddr_len, proto, protolen and the type in the ethernet header
+         are already correct, we tested that before */
+
+      /* return ARP reply */
+      netif->linkoutput(netif, p);
+    /* we are not configured? */
+    } else if (netif->ip_addr.addr == 0) {
+      /* { for_us == 0 and netif->ip_addr.addr == 0 } */
+      LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_arp_input: we are unconfigured, ARP request ignored.\n"));
+    /* request was not directed to us */
+    } else {
+      /* { for_us == 0 and netif->ip_addr.addr != 0 } */
+      LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_arp_input: ARP request was not for us.\n"));
+    }
+    break;
+  case ARP_REPLY:
+    /* ARP reply. We already updated the ARP cache earlier. */
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_arp_input: incoming ARP reply\n"));
+#if (LWIP_DHCP && DHCP_DOES_ARP_CHECK)
+    /* DHCP wants to know about ARP replies from any host with an
+     * IP address also offered to us by the DHCP server. We do not
+     * want to take a duplicate IP address on a single network.
+     * @todo How should we handle redundant (fail-over) interfaces? */
+    dhcp_arp_reply(netif, &sipaddr);
+#endif
+    break;
+  default:
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_arp_input: ARP unknown opcode type %"S16_F"\n", htons(hdr->opcode)));
+    ETHARP_STATS_INC(etharp.err);
+    break;
+  }
+  /* free ARP packet */
+  pbuf_free(p);
+}
+
+/**
+ * Resolve and fill-in Ethernet address header for outgoing IP packet.
+ *
+ * For IP multicast and broadcast, corresponding Ethernet addresses
+ * are selected and the packet is transmitted on the link.
+ *
+ * For unicast addresses, the packet is submitted to etharp_query(). In
+ * case the IP address is outside the local network, the IP address of
+ * the gateway is used.
+ *
+ * @param netif The lwIP network interface which the IP packet will be sent on.
+ * @param q The pbuf(s) containing the IP packet to be sent.
+ * @param ipaddr The IP address of the packet destination.
+ *
+ * @return
+ * - ERR_RTE No route to destination (no gateway to external networks),
+ * or the return type of either etharp_query() or etharp_send_ip().
+ */
+err_t
+etharp_output(struct netif *netif, struct pbuf *q, struct ip_addr *ipaddr)
+{
+  struct eth_addr *dest, mcastaddr;
+
+  /* make room for Ethernet header - should not fail */
+  if (pbuf_header(q, sizeof(struct eth_hdr)) != 0) {
+    /* bail out */
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | 2, ("etharp_output: could not allocate room for header.\n"));
+    LINK_STATS_INC(link.lenerr);
+    return ERR_BUF;
+  }
+
+  /* assume unresolved Ethernet address */
+  dest = NULL;
+  /* Determine on destination hardware address. Broadcasts and multicasts
+   * are special, other IP addresses are looked up in the ARP table. */
+
+  /* broadcast destination IP address? */
+  if (ip_addr_isbroadcast(ipaddr, netif)) {
+    /* broadcast on Ethernet also */
+    dest = (struct eth_addr *)&ethbroadcast;
+  /* multicast destination IP address? */
+  } else if (ip_addr_ismulticast(ipaddr)) {
+    /* Hash IP multicast address to MAC address.*/
+    mcastaddr.addr[0] = 0x01;
+    mcastaddr.addr[1] = 0x00;
+    mcastaddr.addr[2] = 0x5e;
+    mcastaddr.addr[3] = ip4_addr2(ipaddr) & 0x7f;
+    mcastaddr.addr[4] = ip4_addr3(ipaddr);
+    mcastaddr.addr[5] = ip4_addr4(ipaddr);
+    /* destination Ethernet address is multicast */
+    dest = &mcastaddr;
+  /* unicast destination IP address? */
+  } else {
+    /* outside local network? */
+    if (!ip_addr_netcmp(ipaddr, &(netif->ip_addr), &(netif->netmask))) {
+      /* interface has default gateway? */
+      if (netif->gw.addr != 0) {
+        /* send to hardware address of default gateway IP address */
+        ipaddr = &(netif->gw);
+      /* no default gateway available */
+      } else {
+        /* no route to destination error (default gateway missing) */
+        return ERR_RTE;
+      }
+    }
+    /* queue on destination Ethernet address belonging to ipaddr */
+    return etharp_query(netif, ipaddr, q);
+  }
+
+  /* continuation for multicast/broadcast destinations */
+  /* obtain source Ethernet address of the given interface */
+  /* send packet directly on the link */
+  return etharp_send_ip(netif, q, (struct eth_addr*)(netif->hwaddr), dest);
+}
+
+/**
+ * Send an ARP request for the given IP address and/or queue a packet.
+ *
+ * If the IP address was not yet in the cache, a pending ARP cache entry
+ * is added and an ARP request is sent for the given address. The packet
+ * is queued on this entry.
+ *
+ * If the IP address was already pending in the cache, a new ARP request
+ * is sent for the given address. The packet is queued on this entry.
+ *
+ * If the IP address was already stable in the cache, and a packet is
+ * given, it is directly sent and no ARP request is sent out. 
+ * 
+ * If the IP address was already stable in the cache, and no packet is
+ * given, an ARP request is sent out.
+ * 
+ * @param netif The lwIP network interface on which ipaddr
+ * must be queried for.
+ * @param ipaddr The IP address to be resolved.
+ * @param q If non-NULL, a pbuf that must be delivered to the IP address.
+ * q is not freed by this function.
+ *
+ * @note q must only be ONE packet, not a packet queue!
+ *
+ * @return
+ * - ERR_BUF Could not make room for Ethernet header.
+ * - ERR_MEM Hardware address unknown, and no more ARP entries available
+ *   to query for address or queue the packet.
+ * - ERR_MEM Could not queue packet due to memory shortage.
+ * - ERR_RTE No route to destination (no gateway to external networks).
+ * - ERR_ARG Non-unicast address given, those will not appear in ARP cache.
+ *
+ */
+err_t
+etharp_query(struct netif *netif, struct ip_addr *ipaddr, struct pbuf *q)
+{
+  struct eth_addr * srcaddr = (struct eth_addr *)netif->hwaddr;
+  err_t result = ERR_MEM;
+  s8_t i; /* ARP entry index */
+
+  /* non-unicast address? */
+  if (ip_addr_isbroadcast(ipaddr, netif) ||
+      ip_addr_ismulticast(ipaddr) ||
+      ip_addr_isany(ipaddr)) {
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: will not add non-unicast IP address to ARP cache\n"));
+    return ERR_ARG;
+  }
+
+  /* find entry in ARP cache, ask to create entry if queueing packet */
+#if LWIP_NETIF_HWADDRHINT
+  i = find_entry(ipaddr, ETHARP_TRY_HARD, netif);
+#else /* LWIP_NETIF_HWADDRHINT */
+  i = find_entry(ipaddr, ETHARP_TRY_HARD);
+#endif /* LWIP_NETIF_HWADDRHINT */
+
+  /* could not find or create entry? */
+  if (i < 0) {
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: could not create ARP entry\n"));
+    if (q) {
+      LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: packet dropped\n"));
+      ETHARP_STATS_INC(etharp.memerr);
+    }
+    return (err_t)i;
+  }
+
+  /* mark a fresh entry as pending (we just sent a request) */
+  if (arp_table[i].state == ETHARP_STATE_EMPTY) {
+    arp_table[i].state = ETHARP_STATE_PENDING;
+  }
+
+  /* { i is either a STABLE or (new or existing) PENDING entry } */
+  LWIP_ASSERT("arp_table[i].state == PENDING or STABLE",
+  ((arp_table[i].state == ETHARP_STATE_PENDING) ||
+   (arp_table[i].state == ETHARP_STATE_STABLE)));
+
+  /* do we have a pending entry? or an implicit query request? */
+  if ((arp_table[i].state == ETHARP_STATE_PENDING) || (q == NULL)) {
+    /* try to resolve it; send out ARP request */
+    result = etharp_request(netif, ipaddr);
+    if (result != ERR_OK) {
+      /* ARP request couldn't be sent */
+      /* We don't re-send arp request in etharp_tmr, but we still queue packets,
+         since this failure could be temporary, and the next packet calling
+         etharp_query again could lead to sending the queued packets. */
+    }
+  }
+  
+  /* packet given? */
+  if (q != NULL) {
+    /* stable entry? */
+    if (arp_table[i].state == ETHARP_STATE_STABLE) {
+      /* we have a valid IP->Ethernet address mapping */
+      /* send the packet */
+      result = etharp_send_ip(netif, q, srcaddr, &(arp_table[i].ethaddr));
+    /* pending entry? (either just created or already pending */
+    } else if (arp_table[i].state == ETHARP_STATE_PENDING) {
+#if ARP_QUEUEING /* queue the given q packet */
+      struct pbuf *p;
+      int copy_needed = 0;
+      /* IF q includes a PBUF_REF, PBUF_POOL or PBUF_RAM, we have no choice but
+       * to copy the whole queue into a new PBUF_RAM (see bug #11400) 
+       * PBUF_ROMs can be left as they are, since ROM must not get changed. */
+      p = q;
+      while (p) {
+        LWIP_ASSERT("no packet queues allowed!", (p->len != p->tot_len) || (p->next == 0));
+        if(p->type != PBUF_ROM) {
+          copy_needed = 1;
+          break;
+        }
+        p = p->next;
+      }
+      if(copy_needed) {
+        /* copy the whole packet into new pbufs */
+        p = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
+        if(p != NULL) {
+          if (pbuf_copy(p, q) != ERR_OK) {
+            pbuf_free(p);
+            p = NULL;
+          }
+        }
+      } else {
+        /* referencing the old pbuf is enough */
+        p = q;
+        pbuf_ref(p);
+      }
+      /* packet could be taken over? */
+      if (p != NULL) {
+        /* queue packet ... */
+        struct etharp_q_entry *new_entry;
+        /* allocate a new arp queue entry */
+        new_entry = memp_malloc(MEMP_ARP_QUEUE);
+        if (new_entry != NULL) {
+          new_entry->next = 0;
+          new_entry->p = p;
+          if(arp_table[i].q != NULL) {
+            /* queue was already existent, append the new entry to the end */
+            struct etharp_q_entry *r;
+            r = arp_table[i].q;
+            while (r->next != NULL) {
+              r = r->next;
+            }
+            r->next = new_entry;
+          } else {
+            /* queue did not exist, first item in queue */
+            arp_table[i].q = new_entry;
+          }
+          LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: queued packet %p on ARP entry %"S16_F"\n", (void *)q, (s16_t)i));
+          result = ERR_OK;
+        } else {
+          /* the pool MEMP_ARP_QUEUE is empty */
+          pbuf_free(p);
+          LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: could not queue a copy of PBUF_REF packet %p (out of memory)\n", (void *)q));
+          /* { result == ERR_MEM } through initialization */
+        }
+      } else {
+        ETHARP_STATS_INC(etharp.memerr);
+        LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: could not queue a copy of PBUF_REF packet %p (out of memory)\n", (void *)q));
+        /* { result == ERR_MEM } through initialization */
+      }
+#else /* ARP_QUEUEING == 0 */
+      /* q && state == PENDING && ARP_QUEUEING == 0 => result = ERR_MEM */
+      /* { result == ERR_MEM } through initialization */
+      LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_query: Ethernet destination address unknown, queueing disabled, packet %p dropped\n", (void *)q));
+#endif
+    }
+  }
+  return result;
+}
+
+/**
+ * Send a raw ARP packet (opcode and all addresses can be modified)
+ *
+ * @param netif the lwip network interface on which to send the ARP packet
+ * @param ethsrc_addr the source MAC address for the ethernet header
+ * @param ethdst_addr the destination MAC address for the ethernet header
+ * @param hwsrc_addr the source MAC address for the ARP protocol header
+ * @param ipsrc_addr the source IP address for the ARP protocol header
+ * @param hwdst_addr the destination MAC address for the ARP protocol header
+ * @param ipdst_addr the destination IP address for the ARP protocol header
+ * @param opcode the type of the ARP packet
+ * @return ERR_OK if the ARP packet has been sent
+ *         ERR_MEM if the ARP packet couldn't be allocated
+ *         any other err_t on failure
+ */
+#if !LWIP_AUTOIP
+static
+#endif /* LWIP_AUTOIP */
+err_t
+etharp_raw(struct netif *netif, const struct eth_addr *ethsrc_addr,
+           const struct eth_addr *ethdst_addr,
+           const struct eth_addr *hwsrc_addr, const struct ip_addr *ipsrc_addr,
+           const struct eth_addr *hwdst_addr, const struct ip_addr *ipdst_addr,
+           const u16_t opcode)
+{
+  struct pbuf *p;
+  err_t result = ERR_OK;
+  u8_t k; /* ARP entry index */
+  struct etharp_hdr *hdr;
+#if LWIP_AUTOIP
+  const u8_t * ethdst_hwaddr;
+#endif /* LWIP_AUTOIP */
+
+  /* allocate a pbuf for the outgoing ARP request packet */
+  p = pbuf_alloc(PBUF_RAW, sizeof(struct etharp_hdr), PBUF_RAM);
+  /* could allocate a pbuf for an ARP request? */
+  if (p == NULL) {
+    LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE | 2, ("etharp_raw: could not allocate pbuf for ARP request.\n"));
+    ETHARP_STATS_INC(etharp.memerr);
+    return ERR_MEM;
+  }
+  LWIP_ASSERT("check that first pbuf can hold struct etharp_hdr",
+              (p->len >= sizeof(struct etharp_hdr)));
+
+  hdr = p->payload;
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_raw: sending raw ARP packet.\n"));
+  hdr->opcode = htons(opcode);
+
+  LWIP_ASSERT("netif->hwaddr_len must be the same as ETHARP_HWADDR_LEN for etharp!",
+              (netif->hwaddr_len == ETHARP_HWADDR_LEN));
+  k = ETHARP_HWADDR_LEN;
+#if LWIP_AUTOIP
+  /* If we are using Link-Local, ARP packets must be broadcast on the
+   * link layer. (See RFC3927 Section 2.5) */
+  ethdst_hwaddr = ((netif->autoip != NULL) && (netif->autoip->state != AUTOIP_STATE_OFF)) ? (u8_t*)(ethbroadcast.addr) : ethdst_addr->addr;
+#endif /* LWIP_AUTOIP */
+  /* Write MAC-Addresses (combined loop for both headers) */
+  while(k > 0) {
+    k--;
+    /* Write the ARP MAC-Addresses */
+    hdr->shwaddr.addr[k] = hwsrc_addr->addr[k];
+    hdr->dhwaddr.addr[k] = hwdst_addr->addr[k];
+    /* Write the Ethernet MAC-Addresses */
+#if LWIP_AUTOIP
+    hdr->ethhdr.dest.addr[k] = ethdst_hwaddr[k];
+#else  /* LWIP_AUTOIP */
+    hdr->ethhdr.dest.addr[k] = ethdst_addr->addr[k];
+#endif /* LWIP_AUTOIP */
+    hdr->ethhdr.src.addr[k]  = ethsrc_addr->addr[k];
+  }
+  hdr->sipaddr = *(struct ip_addr2 *)ipsrc_addr;
+  hdr->dipaddr = *(struct ip_addr2 *)ipdst_addr;
+
+  hdr->hwtype = htons(HWTYPE_ETHERNET);
+  hdr->proto = htons(ETHTYPE_IP);
+  /* set hwlen and protolen together */
+  hdr->_hwlen_protolen = htons((ETHARP_HWADDR_LEN << 8) | sizeof(struct ip_addr));
+
+  hdr->ethhdr.type = htons(ETHTYPE_ARP);
+  /* send ARP query */
+  result = netif->linkoutput(netif, p);
+  ETHARP_STATS_INC(etharp.xmit);
+  /* free ARP query packet */
+  pbuf_free(p);
+  p = NULL;
+  /* could not allocate pbuf for ARP request */
+
+  return result;
+}
+
+/**
+ * Send an ARP request packet asking for ipaddr.
+ *
+ * @param netif the lwip network interface on which to send the request
+ * @param ipaddr the IP address for which to ask
+ * @return ERR_OK if the request has been sent
+ *         ERR_MEM if the ARP packet couldn't be allocated
+ *         any other err_t on failure
+ */
+err_t
+etharp_request(struct netif *netif, struct ip_addr *ipaddr)
+{
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_request: sending ARP request.\n"));
+  return etharp_raw(netif, (struct eth_addr *)netif->hwaddr, &ethbroadcast,
+                    (struct eth_addr *)netif->hwaddr, &netif->ip_addr, &ethzero,
+                    ipaddr, ARP_REQUEST);
+}
+
+/**
+ * Process received ethernet frames. Using this function instead of directly
+ * calling ip_input and passing ARP frames through etharp in ethernetif_input,
+ * the ARP cache is protected from concurrent access.
+ *
+ * @param p the recevied packet, p->payload pointing to the ethernet header
+ * @param netif the network interface on which the packet was received
+ */
+err_t
+ethernet_input(struct pbuf *p, struct netif *netif)
+{
+  struct eth_hdr* ethhdr;
+
+  /* points to packet payload, which starts with an Ethernet header */
+  ethhdr = p->payload;
+  LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE,
+    ("ethernet_input: dest:%02x:%02x:%02x:%02x:%02x:%02x, src:%02x:%02x:%02x:%02x:%02x:%02x, type:%2hx\n",
+     (unsigned)ethhdr->dest.addr[0], (unsigned)ethhdr->dest.addr[1], (unsigned)ethhdr->dest.addr[2],
+     (unsigned)ethhdr->dest.addr[3], (unsigned)ethhdr->dest.addr[4], (unsigned)ethhdr->dest.addr[5],
+     (unsigned)ethhdr->src.addr[0], (unsigned)ethhdr->src.addr[1], (unsigned)ethhdr->src.addr[2],
+     (unsigned)ethhdr->src.addr[3], (unsigned)ethhdr->src.addr[4], (unsigned)ethhdr->src.addr[5],
+     (unsigned)htons(ethhdr->type)));
+
+  switch (htons(ethhdr->type)) {
+    /* IP packet? */
+    case ETHTYPE_IP:
+#if ETHARP_TRUST_IP_MAC
+      /* update ARP table */
+      etharp_ip_input(netif, p);
+#endif /* ETHARP_TRUST_IP_MAC */
+      /* skip Ethernet header */
+      if(pbuf_header(p, -(s16_t)sizeof(struct eth_hdr))) {
+        LWIP_ASSERT("Can't move over header in packet", 0);
+        pbuf_free(p);
+        p = NULL;
+      } else {
+        /* pass to IP layer */
+        ip_input(p, netif);
+      }
+      break;
+      
+    case ETHTYPE_ARP:
+      /* pass p to ARP module */
+      etharp_arp_input(netif, (struct eth_addr*)(netif->hwaddr), p);
+      break;
+
+#if PPPOE_SUPPORT
+    case ETHTYPE_PPPOEDISC: /* PPP Over Ethernet Discovery Stage */
+      pppoe_disc_input(netif, p);
+      break;
+
+    case ETHTYPE_PPPOE: /* PPP Over Ethernet Session Stage */
+      pppoe_data_input(netif, p);
+      break;
+#endif /* PPPOE_SUPPORT */
+
+    default:
+      ETHARP_STATS_INC(etharp.proterr);
+      ETHARP_STATS_INC(etharp.drop);
+      pbuf_free(p);
+      p = NULL;
+      break;
+  }
+
+  /* This means the pbuf is freed or consumed,
+     so the caller doesn't have to free it again */
+  return ERR_OK;
+}
+#endif /* LWIP_ARP */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ethernetif.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ethernetif.c
new file mode 100644
index 000000000..ccd7bd67f
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ethernetif.c
@@ -0,0 +1,313 @@
+/**
+ * @file
+ * Ethernet Interface Skeleton
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/*
+ * This file is a skeleton for developing Ethernet network interface
+ * drivers for lwIP. Add code to the low_level functions and do a
+ * search-and-replace for the word "ethernetif" to replace it with
+ * something that better describes your network interface.
+ */
+
+#include "lwip/opt.h"
+
+#if 0 /* don't build, this is only a skeleton, see previous comment */
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+#include <lwip/stats.h>
+#include <lwip/snmp.h>
+#include "netif/etharp.h"
+#include "netif/ppp_oe.h"
+
+/* Define those to better describe your network interface. */
+#define IFNAME0 'e'
+#define IFNAME1 'n'
+
+/**
+ * Helper struct to hold private data used to operate your ethernet interface.
+ * Keeping the ethernet address of the MAC in this struct is not necessary
+ * as it is already kept in the struct netif.
+ * But this is only an example, anyway...
+ */
+struct ethernetif {
+  struct eth_addr *ethaddr;
+  /* Add whatever per-interface state that is needed here. */
+};
+
+/* Forward declarations. */
+static void  ethernetif_input(struct netif *netif);
+
+/**
+ * In this function, the hardware should be initialized.
+ * Called from ethernetif_init().
+ *
+ * @param netif the already initialized lwip network interface structure
+ *        for this ethernetif
+ */
+static void
+low_level_init(struct netif *netif)
+{
+  struct ethernetif *ethernetif = netif->state;
+  
+  /* set MAC hardware address length */
+  netif->hwaddr_len = ETHARP_HWADDR_LEN;
+
+  /* set MAC hardware address */
+  netif->hwaddr[0] = ;
+  ...
+  netif->hwaddr[5] = ;
+
+  /* maximum transfer unit */
+  netif->mtu = 1500;
+  
+  /* device capabilities */
+  /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
+  netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
+ 
+  /* Do whatever else is needed to initialize interface. */  
+}
+
+/**
+ * This function should do the actual transmission of the packet. The packet is
+ * contained in the pbuf that is passed to the function. This pbuf
+ * might be chained.
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ * @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
+ * @return ERR_OK if the packet could be sent
+ *         an err_t value if the packet couldn't be sent
+ *
+ * @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
+ *       strange results. You might consider waiting for space in the DMA queue
+ *       to become availale since the stack doesn't retry to send a packet
+ *       dropped because of memory failure (except for the TCP timers).
+ */
+
+static err_t
+low_level_output(struct netif *netif, struct pbuf *p)
+{
+  struct ethernetif *ethernetif = netif->state;
+  struct pbuf *q;
+
+  initiate transfer();
+  
+#if ETH_PAD_SIZE
+  pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
+#endif
+
+  for(q = p; q != NULL; q = q->next) {
+    /* Send the data from the pbuf to the interface, one pbuf at a
+       time. The size of the data in each pbuf is kept in the ->len
+       variable. */
+    send data from(q->payload, q->len);
+  }
+
+  signal that packet should be sent();
+
+#if ETH_PAD_SIZE
+  pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
+#endif
+  
+  LINK_STATS_INC(link.xmit);
+
+  return ERR_OK;
+}
+
+/**
+ * Should allocate a pbuf and transfer the bytes of the incoming
+ * packet from the interface into the pbuf.
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ * @return a pbuf filled with the received packet (including MAC header)
+ *         NULL on memory error
+ */
+static struct pbuf *
+low_level_input(struct netif *netif)
+{
+  struct ethernetif *ethernetif = netif->state;
+  struct pbuf *p, *q;
+  u16_t len;
+
+  /* Obtain the size of the packet and put it into the "len"
+     variable. */
+  len = ;
+
+#if ETH_PAD_SIZE
+  len += ETH_PAD_SIZE; /* allow room for Ethernet padding */
+#endif
+
+  /* We allocate a pbuf chain of pbufs from the pool. */
+  p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
+  
+  if (p != NULL) {
+
+#if ETH_PAD_SIZE
+    pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
+#endif
+
+    /* We iterate over the pbuf chain until we have read the entire
+     * packet into the pbuf. */
+    for(q = p; q != NULL; q = q->next) {
+      /* Read enough bytes to fill this pbuf in the chain. The
+       * available data in the pbuf is given by the q->len
+       * variable. */
+      read data into(q->payload, q->len);
+    }
+    acknowledge that packet has been read();
+
+#if ETH_PAD_SIZE
+    pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
+#endif
+
+    LINK_STATS_INC(link.recv);
+  } else {
+    drop packet();
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.drop);
+  }
+
+  return p;  
+}
+
+/**
+ * This function should be called when a packet is ready to be read
+ * from the interface. It uses the function low_level_input() that
+ * should handle the actual reception of bytes from the network
+ * interface. Then the type of the received packet is determined and
+ * the appropriate input function is called.
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ */
+static void
+ethernetif_input(struct netif *netif)
+{
+  struct ethernetif *ethernetif;
+  struct eth_hdr *ethhdr;
+  struct pbuf *p;
+
+  ethernetif = netif->state;
+
+  /* move received packet into a new pbuf */
+  p = low_level_input(netif);
+  /* no packet could be read, silently ignore this */
+  if (p == NULL) return;
+  /* points to packet payload, which starts with an Ethernet header */
+  ethhdr = p->payload;
+
+  switch (htons(ethhdr->type)) {
+  /* IP or ARP packet? */
+  case ETHTYPE_IP:
+  case ETHTYPE_ARP:
+#if PPPOE_SUPPORT
+  /* PPPoE packet? */
+  case ETHTYPE_PPPOEDISC:
+  case ETHTYPE_PPPOE:
+#endif /* PPPOE_SUPPORT */
+    /* full packet send to tcpip_thread to process */
+    if (netif->input(p, netif)!=ERR_OK)
+     { LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_input: IP input error\n"));
+       pbuf_free(p);
+       p = NULL;
+     }
+    break;
+
+  default:
+    pbuf_free(p);
+    p = NULL;
+    break;
+  }
+}
+
+/**
+ * Should be called at the beginning of the program to set up the
+ * network interface. It calls the function low_level_init() to do the
+ * actual setup of the hardware.
+ *
+ * This function should be passed as a parameter to netif_add().
+ *
+ * @param netif the lwip network interface structure for this ethernetif
+ * @return ERR_OK if the loopif is initialized
+ *         ERR_MEM if private data couldn't be allocated
+ *         any other err_t on error
+ */
+err_t
+ethernetif_init(struct netif *netif)
+{
+  struct ethernetif *ethernetif;
+
+  LWIP_ASSERT("netif != NULL", (netif != NULL));
+    
+  ethernetif = mem_malloc(sizeof(struct ethernetif));
+  if (ethernetif == NULL) {
+    LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_init: out of memory\n"));
+    return ERR_MEM;
+  }
+
+#if LWIP_NETIF_HOSTNAME
+  /* Initialize interface hostname */
+  netif->hostname = "lwip";
+#endif /* LWIP_NETIF_HOSTNAME */
+
+  /*
+   * Initialize the snmp variables and counters inside the struct netif.
+   * The last argument should be replaced with your link speed, in units
+   * of bits per second.
+   */
+  NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
+
+  netif->state = ethernetif;
+  netif->name[0] = IFNAME0;
+  netif->name[1] = IFNAME1;
+  /* We directly use etharp_output() here to save a function call.
+   * You can instead declare your own function an call etharp_output()
+   * from it if you have to do some checks before sending (e.g. if link
+   * is available...) */
+  netif->output = etharp_output;
+  netif->linkoutput = low_level_output;
+  
+  ethernetif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
+  
+  /* initialize the hardware */
+  low_level_init(netif);
+
+  return ERR_OK;
+}
+
+#endif /* 0 */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/loopif.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/loopif.c
new file mode 100644
index 000000000..1e1f28cf1
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/loopif.c
@@ -0,0 +1,66 @@
+/**
+ * @file
+ * Loop Interface
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+#include "lwip/opt.h"
+
+#if LWIP_HAVE_LOOPIF
+
+#include "netif/loopif.h"
+#include "lwip/snmp.h"
+
+/**
+ * Initialize a lwip network interface structure for a loopback interface
+ *
+ * @param netif the lwip network interface structure for this loopif
+ * @return ERR_OK if the loopif is initialized
+ *         ERR_MEM if private data couldn't be allocated
+ */
+err_t
+loopif_init(struct netif *netif)
+{
+  /* initialize the snmp variables and counters inside the struct netif
+   * ifSpeed: no assumption can be made!
+   */
+  NETIF_INIT_SNMP(netif, snmp_ifType_softwareLoopback, 0);
+
+  netif->name[0] = 'l';
+  netif->name[1] = 'o';
+  netif->output = netif_loop_output;
+  return ERR_OK;
+}
+
+#endif /* LWIP_HAVE_LOOPIF */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/auth.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/auth.c
new file mode 100644
index 000000000..4c0ee6a8e
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/auth.c
@@ -0,0 +1,988 @@
+/*****************************************************************************
+* auth.c - Network Authentication and Phase Control program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* Copyright (c) 1997 by Global Election Systems Inc.  All rights reserved.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Ported from public pppd code.
+*****************************************************************************/
+/*
+ * auth.c - PPP authentication and phase control.
+ *
+ * Copyright (c) 1993 The Australian National University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the Australian National University.  The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "fsm.h"
+#include "lcp.h"
+#include "pap.h"
+#include "chap.h"
+#include "auth.h"
+#include "ipcp.h"
+
+#if CBCP_SUPPORT
+#include "cbcp.h"
+#endif /* CBCP_SUPPORT */
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+
+/* Bits in auth_pending[] */
+#define PAP_WITHPEER    1
+#define PAP_PEER        2
+#define CHAP_WITHPEER   4
+#define CHAP_PEER       8
+
+
+/************************/
+/*** LOCAL DATA TYPES ***/
+/************************/
+/* Used for storing a sequence of words.  Usually malloced. */
+struct wordlist {
+  struct wordlist *next;
+  char        word[1];
+};
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+extern char *crypt (const char *, const char *);
+
+/* Prototypes for procedures local to this file. */
+
+static void network_phase (int);
+static void check_idle (void *);
+static void connect_time_expired (void *);
+#if 0
+static int  login (char *, char *, char **, int *);
+#endif
+static void logout (void);
+static int  null_login (int);
+static int  get_pap_passwd (int, char *, char *);
+static int  have_pap_secret (void);
+static int  have_chap_secret (char *, char *, u32_t);
+static int  ip_addr_check (u32_t, struct wordlist *);
+#if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
+static void set_allowed_addrs(int unit, struct wordlist *addrs);
+static void free_wordlist (struct wordlist *);
+#endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
+#if CBCP_SUPPORT
+static void callback_phase (int);
+#endif /* CBCP_SUPPORT */
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+#if PAP_SUPPORT || CHAP_SUPPORT
+/* The name by which the peer authenticated itself to us. */
+static char peer_authname[MAXNAMELEN];
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+/* Records which authentication operations haven't completed yet. */
+static int auth_pending[NUM_PPP];
+
+/* Set if we have successfully called login() */
+static int logged_in;
+
+/* Set if we have run the /etc/ppp/auth-up script. */
+static int did_authup;
+
+/* List of addresses which the peer may use. */
+static struct wordlist *addresses[NUM_PPP];
+
+/* Number of network protocols which we have opened. */
+static int num_np_open;
+
+/* Number of network protocols which have come up. */
+static int num_np_up;
+
+#if PAP_SUPPORT || CHAP_SUPPORT
+/* Set if we got the contents of passwd[] from the pap-secrets file. */
+static int passwd_from_file;
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ * An Open on LCP has requested a change from Dead to Establish phase.
+ * Do what's necessary to bring the physical layer up.
+ */
+void
+link_required(int unit)
+{
+  LWIP_UNUSED_ARG(unit);
+
+  AUTHDEBUG((LOG_INFO, "link_required: %d\n", unit));
+}
+
+/*
+ * LCP has terminated the link; go to the Dead phase and take the
+ * physical layer down.
+ */
+void
+link_terminated(int unit)
+{
+  AUTHDEBUG((LOG_INFO, "link_terminated: %d\n", unit));
+  if (lcp_phase[unit] == PHASE_DEAD) {
+    return;
+  }
+  if (logged_in) {
+    logout();
+  }
+  lcp_phase[unit] = PHASE_DEAD;
+  AUTHDEBUG((LOG_NOTICE, "Connection terminated.\n"));
+  pppLinkTerminated(unit);
+}
+
+/*
+ * LCP has gone down; it will either die or try to re-establish.
+ */
+void
+link_down(int unit)
+{
+  int i;
+  struct protent *protp;
+  
+  AUTHDEBUG((LOG_INFO, "link_down: %d\n", unit));
+  if (did_authup) {
+    /* XXX Do link down processing. */
+    did_authup = 0;
+  }
+  for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+    if (!protp->enabled_flag) {
+      continue;
+    }
+    if (protp->protocol != PPP_LCP && protp->lowerdown != NULL) {
+      (*protp->lowerdown)(unit);
+    }
+    if (protp->protocol < 0xC000 && protp->close != NULL) {
+      (*protp->close)(unit, "LCP down");
+    }
+  }
+  num_np_open = 0;
+  num_np_up = 0;
+  if (lcp_phase[unit] != PHASE_DEAD) {
+    lcp_phase[unit] = PHASE_TERMINATE;
+  }
+  pppLinkDown(unit);
+}
+
+/*
+ * The link is established.
+ * Proceed to the Dead, Authenticate or Network phase as appropriate.
+ */
+void
+link_established(int unit)
+{
+  int auth;
+  int i;
+  struct protent *protp;
+  lcp_options *wo = &lcp_wantoptions[unit];
+  lcp_options *go = &lcp_gotoptions[unit];
+#if PAP_SUPPORT || CHAP_SUPPORT
+  lcp_options *ho = &lcp_hisoptions[unit];
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+  AUTHDEBUG((LOG_INFO, "link_established: %d\n", unit));
+  /*
+   * Tell higher-level protocols that LCP is up.
+   */
+  for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+    if (protp->protocol != PPP_LCP && protp->enabled_flag && protp->lowerup != NULL) {
+      (*protp->lowerup)(unit);
+    }
+  }
+  if (ppp_settings.auth_required && !(go->neg_chap || go->neg_upap)) {
+    /*
+     * We wanted the peer to authenticate itself, and it refused:
+     * treat it as though it authenticated with PAP using a username
+     * of "" and a password of "".  If that's not OK, boot it out.
+     */
+    if (!wo->neg_upap || !null_login(unit)) {
+      AUTHDEBUG((LOG_WARNING, "peer refused to authenticate\n"));
+      lcp_close(unit, "peer refused to authenticate");
+      return;
+    }
+  }
+    
+  lcp_phase[unit] = PHASE_AUTHENTICATE;
+  auth = 0;
+#if CHAP_SUPPORT
+  if (go->neg_chap) {
+    ChapAuthPeer(unit, ppp_settings.our_name, go->chap_mdtype);
+    auth |= CHAP_PEER;
+  } 
+#endif /* CHAP_SUPPORT */
+#if PAP_SUPPORT && CHAP_SUPPORT
+  else
+#endif /* PAP_SUPPORT && CHAP_SUPPORT */
+#if PAP_SUPPORT
+  if (go->neg_upap) {
+    upap_authpeer(unit);
+    auth |= PAP_PEER;
+  }
+#endif /* PAP_SUPPORT */
+#if CHAP_SUPPORT
+  if (ho->neg_chap) {
+    ChapAuthWithPeer(unit, ppp_settings.user, ho->chap_mdtype);
+    auth |= CHAP_WITHPEER;
+  }
+#endif /* CHAP_SUPPORT */
+#if PAP_SUPPORT && CHAP_SUPPORT
+  else
+#endif /* PAP_SUPPORT && CHAP_SUPPORT */
+#if PAP_SUPPORT
+  if (ho->neg_upap) {
+    if (ppp_settings.passwd[0] == 0) {
+      passwd_from_file = 1;
+      if (!get_pap_passwd(unit, ppp_settings.user, ppp_settings.passwd)) {
+        AUTHDEBUG((LOG_ERR, "No secret found for PAP login\n"));
+      }
+    }
+    upap_authwithpeer(unit, ppp_settings.user, ppp_settings.passwd);
+    auth |= PAP_WITHPEER;
+  }
+#endif /* PAP_SUPPORT */
+  auth_pending[unit] = auth;
+
+  if (!auth) {
+    network_phase(unit);
+  }
+}
+
+/*
+ * The peer has failed to authenticate himself using `protocol'.
+ */
+void
+auth_peer_fail(int unit, u16_t protocol)
+{
+  LWIP_UNUSED_ARG(protocol);
+
+  AUTHDEBUG((LOG_INFO, "auth_peer_fail: %d proto=%X\n", unit, protocol));
+  /*
+   * Authentication failure: take the link down
+   */
+  lcp_close(unit, "Authentication failed");
+}
+
+
+#if PAP_SUPPORT || CHAP_SUPPORT
+/*
+ * The peer has been successfully authenticated using `protocol'.
+ */
+void
+auth_peer_success(int unit, u16_t protocol, char *name, int namelen)
+{
+  int pbit;
+  
+  AUTHDEBUG((LOG_INFO, "auth_peer_success: %d proto=%X\n", unit, protocol));
+  switch (protocol) {
+    case PPP_CHAP:
+      pbit = CHAP_PEER;
+      break;
+    case PPP_PAP:
+      pbit = PAP_PEER;
+      break;
+    default:
+      AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
+      return;
+  }
+  
+  /*
+   * Save the authenticated name of the peer for later.
+   */
+  if (namelen > sizeof(peer_authname) - 1) {
+    namelen = sizeof(peer_authname) - 1;
+  }
+  BCOPY(name, peer_authname, namelen);
+  peer_authname[namelen] = 0;
+  
+  /*
+   * If there is no more authentication still to be done,
+   * proceed to the network (or callback) phase.
+   */
+  if ((auth_pending[unit] &= ~pbit) == 0) {
+    network_phase(unit);
+  }
+}
+
+/*
+ * We have failed to authenticate ourselves to the peer using `protocol'.
+ */
+void
+auth_withpeer_fail(int unit, u16_t protocol)
+{
+  int errCode = PPPERR_AUTHFAIL;
+  
+  LWIP_UNUSED_ARG(protocol);
+
+  AUTHDEBUG((LOG_INFO, "auth_withpeer_fail: %d proto=%X\n", unit, protocol));
+  if (passwd_from_file) {
+    BZERO(ppp_settings.passwd, MAXSECRETLEN);
+  }
+  /* 
+   * XXX Warning: the unit number indicates the interface which is
+   * not necessarily the PPP connection.  It works here as long
+   * as we are only supporting PPP interfaces.
+   */
+  pppIOCtl(unit, PPPCTLS_ERRCODE, &errCode);
+
+  /*
+   * We've failed to authenticate ourselves to our peer.
+   * He'll probably take the link down, and there's not much
+   * we can do except wait for that.
+   */
+}
+
+/*
+ * We have successfully authenticated ourselves with the peer using `protocol'.
+ */
+void
+auth_withpeer_success(int unit, u16_t protocol)
+{
+  int pbit;
+  
+  AUTHDEBUG((LOG_INFO, "auth_withpeer_success: %d proto=%X\n", unit, protocol));
+  switch (protocol) {
+    case PPP_CHAP:
+      pbit = CHAP_WITHPEER;
+      break;
+    case PPP_PAP:
+      if (passwd_from_file) {
+        BZERO(ppp_settings.passwd, MAXSECRETLEN);
+      }
+      pbit = PAP_WITHPEER;
+      break;
+    default:
+      AUTHDEBUG((LOG_WARNING, "auth_peer_success: unknown protocol %x\n", protocol));
+      pbit = 0;
+  }
+  
+  /*
+   * If there is no more authentication still being done,
+   * proceed to the network (or callback) phase.
+   */
+  if ((auth_pending[unit] &= ~pbit) == 0) {
+    network_phase(unit);
+  }
+}
+#endif /* PAP_SUPPORT || CHAP_SUPPORT */
+
+
+/*
+ * np_up - a network protocol has come up.
+ */
+void
+np_up(int unit, u16_t proto)
+{
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(proto);
+
+  AUTHDEBUG((LOG_INFO, "np_up: %d proto=%X\n", unit, proto));
+  if (num_np_up == 0) {
+    AUTHDEBUG((LOG_INFO, "np_up: maxconnect=%d idle_time_limit=%d\n",ppp_settings.maxconnect,ppp_settings.idle_time_limit));
+    /*
+     * At this point we consider that the link has come up successfully.
+     */
+    if (ppp_settings.idle_time_limit > 0) {
+      TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit);
+    }
+    
+    /*
+     * Set a timeout to close the connection once the maximum
+     * connect time has expired.
+     */
+    if (ppp_settings.maxconnect > 0) {
+      TIMEOUT(connect_time_expired, 0, ppp_settings.maxconnect);
+    }
+  }
+  ++num_np_up;
+}
+
+/*
+ * np_down - a network protocol has gone down.
+ */
+void
+np_down(int unit, u16_t proto)
+{
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(proto);
+
+  AUTHDEBUG((LOG_INFO, "np_down: %d proto=%X\n", unit, proto));
+  if (--num_np_up == 0 && ppp_settings.idle_time_limit > 0) {
+    UNTIMEOUT(check_idle, NULL);
+  }
+}
+
+/*
+ * np_finished - a network protocol has finished using the link.
+ */
+void
+np_finished(int unit, u16_t proto)
+{
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(proto);
+
+  AUTHDEBUG((LOG_INFO, "np_finished: %d proto=%X\n", unit, proto));
+  if (--num_np_open <= 0) {
+    /* no further use for the link: shut up shop. */
+    lcp_close(0, "No network protocols running");
+  }
+}
+
+/*
+ * auth_reset - called when LCP is starting negotiations to recheck
+ * authentication options, i.e. whether we have appropriate secrets
+ * to use for authenticating ourselves and/or the peer.
+ */
+void
+auth_reset(int unit)
+{
+  lcp_options *go = &lcp_gotoptions[unit];
+  lcp_options *ao = &lcp_allowoptions[0];
+  ipcp_options *ipwo = &ipcp_wantoptions[0];
+  u32_t remote;
+
+  AUTHDEBUG((LOG_INFO, "auth_reset: %d\n", unit));
+  ao->neg_upap = !ppp_settings.refuse_pap && (ppp_settings.passwd[0] != 0 || get_pap_passwd(unit, NULL, NULL));
+  ao->neg_chap = !ppp_settings.refuse_chap && ppp_settings.passwd[0] != 0 /*have_chap_secret(ppp_settings.user, ppp_settings.remote_name, (u32_t)0)*/;
+
+  if (go->neg_upap && !have_pap_secret()) {
+    go->neg_upap = 0;
+  }
+  if (go->neg_chap) {
+    remote = ipwo->accept_remote? 0: ipwo->hisaddr;
+    if (!have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote)) {
+      go->neg_chap = 0;
+    }
+  }
+}
+
+#if PAP_SUPPORT
+/*
+ * check_passwd - Check the user name and passwd against the PAP secrets
+ * file.  If requested, also check against the system password database,
+ * and login the user if OK.
+ *
+ * returns:
+ *  UPAP_AUTHNAK: Authentication failed.
+ *  UPAP_AUTHACK: Authentication succeeded.
+ * In either case, msg points to an appropriate message.
+ */
+int
+check_passwd( int unit, char *auser, int userlen, char *apasswd, int passwdlen, char **msg, int *msglen)
+{
+#if 1
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(auser);
+  LWIP_UNUSED_ARG(userlen);
+  LWIP_UNUSED_ARG(apasswd);
+  LWIP_UNUSED_ARG(passwdlen);
+  LWIP_UNUSED_ARG(msglen);
+  *msg = (char *) 0;
+  return UPAP_AUTHACK;     /* XXX Assume all entries OK. */
+#else
+  int ret = 0;
+  struct wordlist *addrs = NULL;
+  char passwd[256], user[256];
+  char secret[MAXWORDLEN];
+  static u_short attempts = 0;
+  
+  /*
+   * Make copies of apasswd and auser, then null-terminate them.
+   */
+  BCOPY(apasswd, passwd, passwdlen);
+  passwd[passwdlen] = '\0';
+  BCOPY(auser, user, userlen);
+  user[userlen] = '\0';
+  *msg = (char *) 0;
+
+  /* XXX Validate user name and password. */
+  ret = UPAP_AUTHACK;     /* XXX Assume all entries OK. */
+      
+  if (ret == UPAP_AUTHNAK) {
+    if (*msg == (char *) 0) {
+      *msg = "Login incorrect";
+    }
+    *msglen = strlen(*msg);
+    /*
+     * Frustrate passwd stealer programs.
+     * Allow 10 tries, but start backing off after 3 (stolen from login).
+     * On 10'th, drop the connection.
+     */
+    if (attempts++ >= 10) {
+      AUTHDEBUG((LOG_WARNING, "%d LOGIN FAILURES BY %s\n", attempts, user));
+      /*ppp_panic("Excess Bad Logins");*/
+    }
+    if (attempts > 3) {
+      sys_msleep((attempts - 3) * 5);
+    }
+    if (addrs != NULL) {
+      free_wordlist(addrs);
+    }
+  } else {
+    attempts = 0; /* Reset count */
+    if (*msg == (char *) 0) {
+      *msg = "Login ok";
+    }
+    *msglen = strlen(*msg);
+    set_allowed_addrs(unit, addrs);
+  }
+
+  BZERO(passwd, sizeof(passwd));
+  BZERO(secret, sizeof(secret));
+
+  return ret;
+#endif
+}
+#endif /* PAP_SUPPORT */
+
+
+/*
+ * auth_ip_addr - check whether the peer is authorized to use
+ * a given IP address.  Returns 1 if authorized, 0 otherwise.
+ */
+int
+auth_ip_addr(int unit, u32_t addr)
+{
+  return ip_addr_check(addr, addresses[unit]);
+}
+
+/*
+ * bad_ip_adrs - return 1 if the IP address is one we don't want
+ * to use, such as an address in the loopback net or a multicast address.
+ * addr is in network byte order.
+ */
+int
+bad_ip_adrs(u32_t addr)
+{
+  addr = ntohl(addr);
+  return (addr >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET
+      || IN_MULTICAST(addr) || IN_BADCLASS(addr);
+}
+
+
+#if CHAP_SUPPORT
+/*
+ * get_secret - open the CHAP secret file and return the secret
+ * for authenticating the given client on the given server.
+ * (We could be either client or server).
+ */
+int get_secret( int unit, char *client, char *server, char *secret, int *secret_len, int save_addrs)
+{
+#if 1
+  int len;
+  struct wordlist *addrs;
+
+  LWIP_UNUSED_ARG(unit);
+  LWIP_UNUSED_ARG(server);
+  LWIP_UNUSED_ARG(save_addrs);
+
+  addrs = NULL;
+
+  if(!client || !client[0] || strcmp(client, ppp_settings.user)) {
+    return 0;
+  }
+
+  len = strlen(ppp_settings.passwd);
+  if (len > MAXSECRETLEN) {
+    AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
+    len = MAXSECRETLEN;
+  }
+
+  BCOPY(ppp_settings.passwd, secret, len);
+  *secret_len = len;
+
+  return 1;
+#else
+  int ret = 0, len;
+  struct wordlist *addrs;
+  char secbuf[MAXWORDLEN];
+  
+  addrs = NULL;
+  secbuf[0] = 0;
+
+  /* XXX Find secret. */
+  if (ret < 0) {
+    return 0;
+  }
+
+  if (save_addrs) {
+    set_allowed_addrs(unit, addrs);
+  }
+
+  len = strlen(secbuf);
+  if (len > MAXSECRETLEN) {
+    AUTHDEBUG((LOG_ERR, "Secret for %s on %s is too long\n", client, server));
+    len = MAXSECRETLEN;
+  }
+
+  BCOPY(secbuf, secret, len);
+  BZERO(secbuf, sizeof(secbuf));
+  *secret_len = len;
+
+  return 1;
+#endif
+}
+#endif /* CHAP_SUPPORT */
+
+
+#if 0 /* UNUSED */
+/*
+ * auth_check_options - called to check authentication options.
+ */
+void
+auth_check_options(void)
+{
+  lcp_options *wo = &lcp_wantoptions[0];
+  int can_auth;
+  ipcp_options *ipwo = &ipcp_wantoptions[0];
+  u32_t remote;
+
+  /* Default our_name to hostname, and user to our_name */
+  if (ppp_settings.our_name[0] == 0 || ppp_settings.usehostname) {
+      strcpy(ppp_settings.our_name, ppp_settings.hostname);
+  }
+
+  if (ppp_settings.user[0] == 0) {
+    strcpy(ppp_settings.user, ppp_settings.our_name);
+  }
+
+  /* If authentication is required, ask peer for CHAP or PAP. */
+  if (ppp_settings.auth_required && !wo->neg_chap && !wo->neg_upap) {
+    wo->neg_chap = 1;
+    wo->neg_upap = 1;
+  }
+  
+  /*
+   * Check whether we have appropriate secrets to use
+   * to authenticate the peer.
+   */
+  can_auth = wo->neg_upap && have_pap_secret();
+  if (!can_auth && wo->neg_chap) {
+    remote = ipwo->accept_remote? 0: ipwo->hisaddr;
+    can_auth = have_chap_secret(ppp_settings.remote_name, ppp_settings.our_name, remote);
+  }
+
+  if (ppp_settings.auth_required && !can_auth) {
+    ppp_panic("No auth secret");
+  }
+}
+#endif
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+/*
+ * Proceed to the network phase.
+ */
+static void
+network_phase(int unit)
+{
+  int i;
+  struct protent *protp;
+  lcp_options *go = &lcp_gotoptions[unit];
+  
+  /*
+   * If the peer had to authenticate, run the auth-up script now.
+   */
+  if ((go->neg_chap || go->neg_upap) && !did_authup) {
+    /* XXX Do setup for peer authentication. */
+    did_authup = 1;
+  }
+
+#if CBCP_SUPPORT
+  /*
+   * If we negotiated callback, do it now.
+   */
+  if (go->neg_cbcp) {
+    lcp_phase[unit] = PHASE_CALLBACK;
+    (*cbcp_protent.open)(unit);
+    return;
+  }
+#endif /* CBCP_SUPPORT */
+
+  lcp_phase[unit] = PHASE_NETWORK;
+  for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+    if (protp->protocol < 0xC000 && protp->enabled_flag && protp->open != NULL) {
+      (*protp->open)(unit);
+      if (protp->protocol != PPP_CCP) {
+        ++num_np_open;
+      }
+    }
+  }
+
+  if (num_np_open == 0) {
+    /* nothing to do */
+    lcp_close(0, "No network protocols running");
+  }
+}
+
+/*
+ * check_idle - check whether the link has been idle for long
+ * enough that we can shut it down.
+ */
+static void
+check_idle(void *arg)
+{
+  struct ppp_idle idle;
+  u_short itime;
+  
+  LWIP_UNUSED_ARG(arg);
+  if (!get_idle_time(0, &idle)) {
+    return;
+  }
+  itime = LWIP_MIN(idle.xmit_idle, idle.recv_idle);
+  if (itime >= ppp_settings.idle_time_limit) {
+    /* link is idle: shut it down. */
+    AUTHDEBUG((LOG_INFO, "Terminating connection due to lack of activity.\n"));
+    lcp_close(0, "Link inactive");
+  } else {
+    TIMEOUT(check_idle, NULL, ppp_settings.idle_time_limit - itime);
+  }
+}
+
+/*
+ * connect_time_expired - log a message and close the connection.
+ */
+static void
+connect_time_expired(void *arg)
+{
+  LWIP_UNUSED_ARG(arg);
+
+  AUTHDEBUG((LOG_INFO, "Connect time expired\n"));
+  lcp_close(0, "Connect time expired");   /* Close connection */
+}
+
+#if 0
+/*
+ * login - Check the user name and password against the system
+ * password database, and login the user if OK.
+ *
+ * returns:
+ *  UPAP_AUTHNAK: Login failed.
+ *  UPAP_AUTHACK: Login succeeded.
+ * In either case, msg points to an appropriate message.
+ */
+static int
+login(char *user, char *passwd, char **msg, int *msglen)
+{
+  /* XXX Fail until we decide that we want to support logins. */
+  return (UPAP_AUTHNAK);
+}
+#endif
+
+/*
+ * logout - Logout the user.
+ */
+static void
+logout(void)
+{
+  logged_in = 0;
+}
+
+/*
+ * null_login - Check if a username of "" and a password of "" are
+ * acceptable, and iff so, set the list of acceptable IP addresses
+ * and return 1.
+ */
+static int
+null_login(int unit)
+{
+  LWIP_UNUSED_ARG(unit);
+  /* XXX Fail until we decide that we want to support logins. */
+  return 0;
+}
+
+/*
+ * get_pap_passwd - get a password for authenticating ourselves with
+ * our peer using PAP.  Returns 1 on success, 0 if no suitable password
+ * could be found.
+ */
+static int
+get_pap_passwd(int unit, char *user, char *passwd)
+{
+  LWIP_UNUSED_ARG(unit);
+/* normally we would reject PAP if no password is provided,
+   but this causes problems with some providers (like CHT in Taiwan)
+   who incorrectly request PAP and expect a bogus/empty password, so
+   always provide a default user/passwd of "none"/"none"
+*/
+  if(user) {
+    strcpy(user, "none");
+  }
+  if(passwd) {
+    strcpy(passwd, "none");
+  }
+  return 1;
+}
+
+/*
+ * have_pap_secret - check whether we have a PAP file with any
+ * secrets that we could possibly use for authenticating the peer.
+ */
+static int
+have_pap_secret(void)
+{
+  /* XXX Fail until we set up our passwords. */
+  return 0;
+}
+
+/*
+ * have_chap_secret - check whether we have a CHAP file with a
+ * secret that we could possibly use for authenticating `client'
+ * on `server'.  Either can be the null string, meaning we don't
+ * know the identity yet.
+ */
+static int
+have_chap_secret(char *client, char *server, u32_t remote)
+{
+  LWIP_UNUSED_ARG(client);
+  LWIP_UNUSED_ARG(server);
+  LWIP_UNUSED_ARG(remote);
+  /* XXX Fail until we set up our passwords. */
+  return 0;
+}
+
+#if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
+/*
+ * set_allowed_addrs() - set the list of allowed addresses.
+ */
+static void
+set_allowed_addrs(int unit, struct wordlist *addrs)
+{
+  if (addresses[unit] != NULL) {
+    free_wordlist(addresses[unit]);
+  }
+  addresses[unit] = addrs;
+
+#if 0
+  /*
+   * If there's only one authorized address we might as well
+   * ask our peer for that one right away
+   */
+  if (addrs != NULL && addrs->next == NULL) {
+    char *p = addrs->word;
+    struct ipcp_options *wo = &ipcp_wantoptions[unit];
+    u32_t a;
+    struct hostent *hp;
+    
+    if (wo->hisaddr == 0 && *p != '!' && *p != '-' && strchr(p, '/') == NULL) {
+      hp = gethostbyname(p);
+      if (hp != NULL && hp->h_addrtype == AF_INET) {
+        a = *(u32_t *)hp->h_addr;
+      } else {
+        a = inet_addr(p);
+      }
+      if (a != (u32_t) -1) {
+        wo->hisaddr = a;
+      }
+    }
+  }
+#endif
+}
+#endif /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
+
+static int
+ip_addr_check(u32_t addr, struct wordlist *addrs)
+{
+  /* don't allow loopback or multicast address */
+  if (bad_ip_adrs(addr)) {
+    return 0;
+  }
+
+  if (addrs == NULL) {
+    return !ppp_settings.auth_required; /* no addresses authorized */
+  }
+
+  /* XXX All other addresses allowed. */
+  return 1;
+}
+
+#if 0 /* PAP_SUPPORT || CHAP_SUPPORT */
+/*
+ * free_wordlist - release memory allocated for a wordlist.
+ */
+static void
+free_wordlist(struct wordlist *wp)
+{
+  struct wordlist *next;
+  
+  while (wp != NULL) {
+    next = wp->next;
+    free(wp);
+    wp = next;
+  }
+}
+#endif  /* 0 */ /* PAP_SUPPORT || CHAP_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/auth.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/auth.h
new file mode 100644
index 000000000..86ff04945
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/auth.h
@@ -0,0 +1,111 @@
+/*****************************************************************************
+* auth.h -  PPP Authentication and phase control header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1998 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original derived from BSD pppd.h.
+*****************************************************************************/
+/*
+ * pppd.h - PPP daemon global declarations.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+
+#ifndef AUTH_H
+#define AUTH_H
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+
+/* we are starting to use the link */
+void link_required (int);
+
+/* we are finished with the link */
+void link_terminated (int);
+
+/* the LCP layer has left the Opened state */
+void link_down (int);
+
+/* the link is up; authenticate now */
+void link_established (int);
+
+/* a network protocol has come up */
+void np_up (int, u16_t);
+
+/* a network protocol has gone down */
+void np_down (int, u16_t);
+
+/* a network protocol no longer needs link */
+void np_finished (int, u16_t);
+
+/* peer failed to authenticate itself */
+void auth_peer_fail (int, u16_t);
+
+/* peer successfully authenticated itself */
+void auth_peer_success (int, u16_t, char *, int);
+
+/* we failed to authenticate ourselves */
+void auth_withpeer_fail (int, u16_t);
+
+/* we successfully authenticated ourselves */
+void auth_withpeer_success (int, u16_t);
+
+/* check authentication options supplied */
+void auth_check_options (void);
+
+/* check what secrets we have */
+void auth_reset (int);
+
+/* Check peer-supplied username/password */
+int  check_passwd (int, char *, int, char *, int, char **, int *);
+
+/* get "secret" for chap */
+int  get_secret (int, char *, char *, char *, int *, int);
+
+/* check if IP address is authorized */
+int  auth_ip_addr (int, u32_t);
+
+/* check if IP address is unreasonable */
+int  bad_ip_adrs (u32_t);
+
+#endif /* AUTH_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chap.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chap.c
new file mode 100644
index 000000000..6d9c3c3ce
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chap.c
@@ -0,0 +1,902 @@
+/*** WARNING - THIS HAS NEVER BEEN FINISHED ***/
+/*****************************************************************************
+* chap.c - Network Challenge Handshake Authentication Protocol program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original based on BSD chap.c.
+*****************************************************************************/
+/*
+ * chap.c - Challenge Handshake Authentication Protocol.
+ *
+ * Copyright (c) 1993 The Australian National University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the Australian National University.  The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Copyright (c) 1991 Gregory M. Christy.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Gregory M. Christy.  The name of the author may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT  /* don't build if not configured for use in lwipopts.h */
+
+#if CHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "magic.h"
+#include "randm.h"
+#include "auth.h"
+#include "md5.h"
+#include "chap.h"
+#include "chpms.h"
+
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+
+
+/************************/
+/*** LOCAL DATA TYPES ***/
+/************************/
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+/*
+ * Protocol entry points.
+ */
+static void ChapInit (int);
+static void ChapLowerUp (int);
+static void ChapLowerDown (int);
+static void ChapInput (int, u_char *, int);
+static void ChapProtocolReject (int);
+#if 0
+static int  ChapPrintPkt (u_char *, int, void (*) (void *, char *, ...), void *);
+#endif
+
+static void ChapChallengeTimeout (void *);
+static void ChapResponseTimeout (void *);
+static void ChapReceiveChallenge (chap_state *, u_char *, int, int);
+static void ChapRechallenge (void *);
+static void ChapReceiveResponse (chap_state *, u_char *, int, int);
+static void ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len);
+static void ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len);
+static void ChapSendStatus (chap_state *, int);
+static void ChapSendChallenge (chap_state *);
+static void ChapSendResponse (chap_state *);
+static void ChapGenChallenge (chap_state *);
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+chap_state chap[NUM_PPP]; /* CHAP state; one for each unit */
+
+struct protent chap_protent = {
+  PPP_CHAP,
+  ChapInit,
+  ChapInput,
+  ChapProtocolReject,
+  ChapLowerUp,
+  ChapLowerDown,
+  NULL,
+  NULL,
+#if 0
+  ChapPrintPkt,
+  NULL,
+#endif
+  1,
+  "CHAP",
+#if 0
+  NULL,
+  NULL,
+  NULL
+#endif
+};
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ * ChapAuthWithPeer - Authenticate us with our peer (start client).
+ *
+ */
+void
+ChapAuthWithPeer(int unit, char *our_name, int digest)
+{
+  chap_state *cstate = &chap[unit];
+
+  cstate->resp_name = our_name;
+  cstate->resp_type = digest;
+
+  if (cstate->clientstate == CHAPCS_INITIAL ||
+      cstate->clientstate == CHAPCS_PENDING) {
+    /* lower layer isn't up - wait until later */
+    cstate->clientstate = CHAPCS_PENDING;
+    return;
+  }
+
+  /*
+   * We get here as a result of LCP coming up.
+   * So even if CHAP was open before, we will 
+   * have to re-authenticate ourselves.
+   */
+  cstate->clientstate = CHAPCS_LISTEN;
+}
+
+
+/*
+ * ChapAuthPeer - Authenticate our peer (start server).
+ */
+void
+ChapAuthPeer(int unit, char *our_name, int digest)
+{
+  chap_state *cstate = &chap[unit];
+
+  cstate->chal_name = our_name;
+  cstate->chal_type = digest;
+  
+  if (cstate->serverstate == CHAPSS_INITIAL ||
+      cstate->serverstate == CHAPSS_PENDING) {
+    /* lower layer isn't up - wait until later */
+    cstate->serverstate = CHAPSS_PENDING;
+    return;
+  }
+
+  ChapGenChallenge(cstate);
+  ChapSendChallenge(cstate);    /* crank it up dude! */
+  cstate->serverstate = CHAPSS_INITIAL_CHAL;
+}
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+/*
+ * ChapInit - Initialize a CHAP unit.
+ */
+static void
+ChapInit(int unit)
+{
+  chap_state *cstate = &chap[unit];
+
+  BZERO(cstate, sizeof(*cstate));
+  cstate->unit = unit;
+  cstate->clientstate = CHAPCS_INITIAL;
+  cstate->serverstate = CHAPSS_INITIAL;
+  cstate->timeouttime = CHAP_DEFTIMEOUT;
+  cstate->max_transmits = CHAP_DEFTRANSMITS;
+  /* random number generator is initialized in magic_init */
+}
+
+
+/*
+ * ChapChallengeTimeout - Timeout expired on sending challenge.
+ */
+static void
+ChapChallengeTimeout(void *arg)
+{
+  chap_state *cstate = (chap_state *) arg;
+
+  /* if we aren't sending challenges, don't worry.  then again we */
+  /* probably shouldn't be here either */
+  if (cstate->serverstate != CHAPSS_INITIAL_CHAL &&
+      cstate->serverstate != CHAPSS_RECHALLENGE) {
+    return;
+  }
+
+  if (cstate->chal_transmits >= cstate->max_transmits) {
+    /* give up on peer */
+    CHAPDEBUG((LOG_ERR, "Peer failed to respond to CHAP challenge\n"));
+    cstate->serverstate = CHAPSS_BADAUTH;
+    auth_peer_fail(cstate->unit, PPP_CHAP);
+    return;
+  }
+
+  ChapSendChallenge(cstate); /* Re-send challenge */
+}
+
+
+/*
+ * ChapResponseTimeout - Timeout expired on sending response.
+ */
+static void
+ChapResponseTimeout(void *arg)
+{
+  chap_state *cstate = (chap_state *) arg;
+
+  /* if we aren't sending a response, don't worry. */
+  if (cstate->clientstate != CHAPCS_RESPONSE) {
+    return;
+  }
+
+  ChapSendResponse(cstate);    /* re-send response */
+}
+
+
+/*
+ * ChapRechallenge - Time to challenge the peer again.
+ */
+static void
+ChapRechallenge(void *arg)
+{
+  chap_state *cstate = (chap_state *) arg;
+  
+  /* if we aren't sending a response, don't worry. */
+  if (cstate->serverstate != CHAPSS_OPEN) {
+    return;
+  }
+
+  ChapGenChallenge(cstate);
+  ChapSendChallenge(cstate);
+  cstate->serverstate = CHAPSS_RECHALLENGE;
+}
+
+
+/*
+ * ChapLowerUp - The lower layer is up.
+ *
+ * Start up if we have pending requests.
+ */
+static void
+ChapLowerUp(int unit)
+{
+  chap_state *cstate = &chap[unit];
+
+  if (cstate->clientstate == CHAPCS_INITIAL) {
+    cstate->clientstate = CHAPCS_CLOSED;
+  } else if (cstate->clientstate == CHAPCS_PENDING) {
+    cstate->clientstate = CHAPCS_LISTEN;
+  }
+
+  if (cstate->serverstate == CHAPSS_INITIAL) {
+    cstate->serverstate = CHAPSS_CLOSED;
+  } else if (cstate->serverstate == CHAPSS_PENDING) {
+    ChapGenChallenge(cstate);
+    ChapSendChallenge(cstate);
+    cstate->serverstate = CHAPSS_INITIAL_CHAL;
+  }
+}
+
+
+/*
+ * ChapLowerDown - The lower layer is down.
+ *
+ * Cancel all timeouts.
+ */
+static void
+ChapLowerDown(int unit)
+{
+  chap_state *cstate = &chap[unit];
+
+  /* Timeout(s) pending?  Cancel if so. */
+  if (cstate->serverstate == CHAPSS_INITIAL_CHAL ||
+      cstate->serverstate == CHAPSS_RECHALLENGE) {
+    UNTIMEOUT(ChapChallengeTimeout, cstate);
+  } else if (cstate->serverstate == CHAPSS_OPEN
+      && cstate->chal_interval != 0) {
+    UNTIMEOUT(ChapRechallenge, cstate);
+  }
+  if (cstate->clientstate == CHAPCS_RESPONSE) {
+    UNTIMEOUT(ChapResponseTimeout, cstate);
+  }
+  cstate->clientstate = CHAPCS_INITIAL;
+  cstate->serverstate = CHAPSS_INITIAL;
+}
+
+
+/*
+ * ChapProtocolReject - Peer doesn't grok CHAP.
+ */
+static void
+ChapProtocolReject(int unit)
+{
+  chap_state *cstate = &chap[unit];
+  
+  if (cstate->serverstate != CHAPSS_INITIAL &&
+      cstate->serverstate != CHAPSS_CLOSED) {
+    auth_peer_fail(unit, PPP_CHAP);
+  }
+  if (cstate->clientstate != CHAPCS_INITIAL &&
+      cstate->clientstate != CHAPCS_CLOSED) {
+    auth_withpeer_fail(unit, PPP_CHAP);
+  }
+  ChapLowerDown(unit); /* shutdown chap */
+}
+
+
+/*
+ * ChapInput - Input CHAP packet.
+ */
+static void
+ChapInput(int unit, u_char *inpacket, int packet_len)
+{
+  chap_state *cstate = &chap[unit];
+  u_char *inp;
+  u_char code, id;
+  int len;
+  
+  /*
+   * Parse header (code, id and length).
+   * If packet too short, drop it.
+   */
+  inp = inpacket;
+  if (packet_len < CHAP_HEADERLEN) {
+    CHAPDEBUG((LOG_INFO, "ChapInput: rcvd short header.\n"));
+    return;
+  }
+  GETCHAR(code, inp);
+  GETCHAR(id, inp);
+  GETSHORT(len, inp);
+  if (len < CHAP_HEADERLEN) {
+    CHAPDEBUG((LOG_INFO, "ChapInput: rcvd illegal length.\n"));
+    return;
+  }
+  if (len > packet_len) {
+    CHAPDEBUG((LOG_INFO, "ChapInput: rcvd short packet.\n"));
+    return;
+  }
+  len -= CHAP_HEADERLEN;
+  
+  /*
+   * Action depends on code (as in fact it usually does :-).
+   */
+  switch (code) {
+    case CHAP_CHALLENGE:
+      ChapReceiveChallenge(cstate, inp, id, len);
+      break;
+    
+    case CHAP_RESPONSE:
+      ChapReceiveResponse(cstate, inp, id, len);
+      break;
+    
+    case CHAP_FAILURE:
+      ChapReceiveFailure(cstate, inp, id, len);
+      break;
+    
+    case CHAP_SUCCESS:
+      ChapReceiveSuccess(cstate, inp, id, len);
+      break;
+    
+    default:        /* Need code reject? */
+      CHAPDEBUG((LOG_WARNING, "Unknown CHAP code (%d) received.\n", code));
+      break;
+  }
+}
+
+
+/*
+ * ChapReceiveChallenge - Receive Challenge and send Response.
+ */
+static void
+ChapReceiveChallenge(chap_state *cstate, u_char *inp, int id, int len)
+{
+  int rchallenge_len;
+  u_char *rchallenge;
+  int secret_len;
+  char secret[MAXSECRETLEN];
+  char rhostname[256];
+  MD5_CTX mdContext;
+  u_char hash[MD5_SIGNATURE_SIZE];
+  
+  CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: Rcvd id %d.\n", id));
+  if (cstate->clientstate == CHAPCS_CLOSED ||
+    cstate->clientstate == CHAPCS_PENDING) {
+    CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: in state %d\n",
+         cstate->clientstate));
+    return;
+  }
+
+  if (len < 2) {
+    CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: rcvd short packet.\n"));
+    return;
+  }
+
+  GETCHAR(rchallenge_len, inp);
+  len -= sizeof (u_char) + rchallenge_len;  /* now name field length */
+  if (len < 0) {
+    CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: rcvd short packet.\n"));
+    return;
+  }
+  rchallenge = inp;
+  INCPTR(rchallenge_len, inp);
+
+  if (len >= sizeof(rhostname)) {
+    len = sizeof(rhostname) - 1;
+  }
+  BCOPY(inp, rhostname, len);
+  rhostname[len] = '\000';
+
+  CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: received name field '%s'\n", rhostname));
+
+  /* Microsoft doesn't send their name back in the PPP packet */
+  if (ppp_settings.remote_name[0] != 0 && (ppp_settings.explicit_remote || rhostname[0] == 0)) {
+    strncpy(rhostname, ppp_settings.remote_name, sizeof(rhostname));
+    rhostname[sizeof(rhostname) - 1] = 0;
+    CHAPDEBUG((LOG_INFO, "ChapReceiveChallenge: using '%s' as remote name\n", rhostname));
+  }
+
+  /* get secret for authenticating ourselves with the specified host */
+  if (!get_secret(cstate->unit, cstate->resp_name, rhostname, secret, &secret_len, 0)) {
+    secret_len = 0;    /* assume null secret if can't find one */
+    CHAPDEBUG((LOG_WARNING, "No CHAP secret found for authenticating us to %s\n", rhostname));
+  }
+
+  /* cancel response send timeout if necessary */
+  if (cstate->clientstate == CHAPCS_RESPONSE) {
+    UNTIMEOUT(ChapResponseTimeout, cstate);
+  }
+
+  cstate->resp_id = id;
+  cstate->resp_transmits = 0;
+
+  /*  generate MD based on negotiated type */
+  switch (cstate->resp_type) { 
+
+  case CHAP_DIGEST_MD5:
+    MD5Init(&mdContext);
+    MD5Update(&mdContext, &cstate->resp_id, 1);
+    MD5Update(&mdContext, (u_char*)secret, secret_len);
+    MD5Update(&mdContext, rchallenge, rchallenge_len);
+    MD5Final(hash, &mdContext);
+    BCOPY(hash, cstate->response, MD5_SIGNATURE_SIZE);
+    cstate->resp_length = MD5_SIGNATURE_SIZE;
+    break;
+  
+#ifdef CHAPMS
+  case CHAP_MICROSOFT:
+    ChapMS(cstate, rchallenge, rchallenge_len, secret, secret_len);
+    break;
+#endif
+
+  default:
+    CHAPDEBUG((LOG_INFO, "unknown digest type %d\n", cstate->resp_type));
+    return;
+  }
+
+  BZERO(secret, sizeof(secret));
+  ChapSendResponse(cstate);
+}
+
+
+/*
+ * ChapReceiveResponse - Receive and process response.
+ */
+static void
+ChapReceiveResponse(chap_state *cstate, u_char *inp, int id, int len)
+{
+  u_char *remmd, remmd_len;
+  int secret_len, old_state;
+  int code;
+  char rhostname[256];
+  MD5_CTX mdContext;
+  char secret[MAXSECRETLEN];
+  u_char hash[MD5_SIGNATURE_SIZE];
+  
+  CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: Rcvd id %d.\n", id));
+  
+  if (cstate->serverstate == CHAPSS_CLOSED ||
+      cstate->serverstate == CHAPSS_PENDING) {
+    CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: in state %d\n",
+    cstate->serverstate));
+    return;
+  }
+
+  if (id != cstate->chal_id) {
+    return;      /* doesn't match ID of last challenge */
+  }
+
+  /*
+  * If we have received a duplicate or bogus Response,
+  * we have to send the same answer (Success/Failure)
+  * as we did for the first Response we saw.
+  */
+  if (cstate->serverstate == CHAPSS_OPEN) {
+    ChapSendStatus(cstate, CHAP_SUCCESS);
+    return;
+  }
+  if (cstate->serverstate == CHAPSS_BADAUTH) {
+    ChapSendStatus(cstate, CHAP_FAILURE);
+    return;
+  }
+  
+  if (len < 2) {
+    CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: rcvd short packet.\n"));
+    return;
+  }
+  GETCHAR(remmd_len, inp); /* get length of MD */
+  remmd = inp;             /* get pointer to MD */
+  INCPTR(remmd_len, inp);
+  
+  len -= sizeof (u_char) + remmd_len;
+  if (len < 0) {
+    CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: rcvd short packet.\n"));
+    return;
+  }
+
+  UNTIMEOUT(ChapChallengeTimeout, cstate);
+  
+  if (len >= sizeof(rhostname)) {
+    len = sizeof(rhostname) - 1;
+  }
+  BCOPY(inp, rhostname, len);
+  rhostname[len] = '\000';
+
+  CHAPDEBUG((LOG_INFO, "ChapReceiveResponse: received name field: %s\n", rhostname));
+
+  /*
+  * Get secret for authenticating them with us,
+  * do the hash ourselves, and compare the result.
+  */
+  code = CHAP_FAILURE;
+  if (!get_secret(cstate->unit, rhostname, cstate->chal_name, secret, &secret_len, 1)) {
+    /* CHAPDEBUG((LOG_WARNING, TL_CHAP, "No CHAP secret found for authenticating %s\n", rhostname)); */
+    CHAPDEBUG((LOG_WARNING, "No CHAP secret found for authenticating %s\n",
+    rhostname));
+  } else {
+    /*  generate MD based on negotiated type */
+    switch (cstate->chal_type) {
+
+      case CHAP_DIGEST_MD5:    /* only MD5 is defined for now */
+        if (remmd_len != MD5_SIGNATURE_SIZE) {
+          break;      /* it's not even the right length */
+        }
+        MD5Init(&mdContext);
+        MD5Update(&mdContext, &cstate->chal_id, 1);
+        MD5Update(&mdContext, (u_char*)secret, secret_len);
+        MD5Update(&mdContext, cstate->challenge, cstate->chal_len);
+        MD5Final(hash, &mdContext); 
+        
+        /* compare local and remote MDs and send the appropriate status */
+        if (memcmp (hash, remmd, MD5_SIGNATURE_SIZE) == 0) {
+          code = CHAP_SUCCESS;  /* they are the same! */
+        }
+        break;
+      
+      default:
+        CHAPDEBUG((LOG_INFO, "unknown digest type %d\n", cstate->chal_type));
+    }
+  }
+  
+  BZERO(secret, sizeof(secret));
+  ChapSendStatus(cstate, code);
+
+  if (code == CHAP_SUCCESS) {
+    old_state = cstate->serverstate;
+    cstate->serverstate = CHAPSS_OPEN;
+    if (old_state == CHAPSS_INITIAL_CHAL) {
+      auth_peer_success(cstate->unit, PPP_CHAP, rhostname, len);
+    }
+    if (cstate->chal_interval != 0) {
+      TIMEOUT(ChapRechallenge, cstate, cstate->chal_interval);
+    }
+  } else {
+    CHAPDEBUG((LOG_ERR, "CHAP peer authentication failed\n"));
+    cstate->serverstate = CHAPSS_BADAUTH;
+    auth_peer_fail(cstate->unit, PPP_CHAP);
+  }
+}
+
+/*
+ * ChapReceiveSuccess - Receive Success
+ */
+static void
+ChapReceiveSuccess(chap_state *cstate, u_char *inp, u_char id, int len)
+{
+  LWIP_UNUSED_ARG(id);
+  LWIP_UNUSED_ARG(inp);
+
+  CHAPDEBUG((LOG_INFO, "ChapReceiveSuccess: Rcvd id %d.\n", id));
+
+  if (cstate->clientstate == CHAPCS_OPEN) {
+    /* presumably an answer to a duplicate response */
+    return;
+  }
+
+  if (cstate->clientstate != CHAPCS_RESPONSE) {
+    /* don't know what this is */
+    CHAPDEBUG((LOG_INFO, "ChapReceiveSuccess: in state %d\n", cstate->clientstate));
+    return;
+  }
+  
+  UNTIMEOUT(ChapResponseTimeout, cstate);
+  
+  /*
+   * Print message.
+   */
+  if (len > 0) {
+    PRINTMSG(inp, len);
+  }
+
+  cstate->clientstate = CHAPCS_OPEN;
+
+  auth_withpeer_success(cstate->unit, PPP_CHAP);
+}
+
+
+/*
+ * ChapReceiveFailure - Receive failure.
+ */
+static void
+ChapReceiveFailure(chap_state *cstate, u_char *inp, u_char id, int len)
+{
+  LWIP_UNUSED_ARG(id);
+  LWIP_UNUSED_ARG(inp);
+
+  CHAPDEBUG((LOG_INFO, "ChapReceiveFailure: Rcvd id %d.\n", id));
+
+  if (cstate->clientstate != CHAPCS_RESPONSE) {
+    /* don't know what this is */
+    CHAPDEBUG((LOG_INFO, "ChapReceiveFailure: in state %d\n", cstate->clientstate));
+    return;
+  }
+
+  UNTIMEOUT(ChapResponseTimeout, cstate);
+
+  /*
+   * Print message.
+   */
+  if (len > 0) {
+    PRINTMSG(inp, len);
+  }
+
+  CHAPDEBUG((LOG_ERR, "CHAP authentication failed\n"));
+  auth_withpeer_fail(cstate->unit, PPP_CHAP);
+}
+
+
+/*
+ * ChapSendChallenge - Send an Authenticate challenge.
+ */
+static void
+ChapSendChallenge(chap_state *cstate)
+{
+  u_char *outp;
+  int chal_len, name_len;
+  int outlen;
+  
+  chal_len = cstate->chal_len;
+  name_len = strlen(cstate->chal_name);
+  outlen = CHAP_HEADERLEN + sizeof (u_char) + chal_len + name_len;
+  outp = outpacket_buf[cstate->unit];
+  
+  MAKEHEADER(outp, PPP_CHAP);    /* paste in a CHAP header */
+  
+  PUTCHAR(CHAP_CHALLENGE, outp);
+  PUTCHAR(cstate->chal_id, outp);
+  PUTSHORT(outlen, outp);
+  
+  PUTCHAR(chal_len, outp);    /* put length of challenge */
+  BCOPY(cstate->challenge, outp, chal_len);
+  INCPTR(chal_len, outp);
+  
+  BCOPY(cstate->chal_name, outp, name_len);  /* append hostname */
+  
+  pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
+  
+  CHAPDEBUG((LOG_INFO, "ChapSendChallenge: Sent id %d.\n", cstate->chal_id));
+  
+  TIMEOUT(ChapChallengeTimeout, cstate, cstate->timeouttime);
+  ++cstate->chal_transmits;
+}
+
+
+/*
+ * ChapSendStatus - Send a status response (ack or nak).
+ */
+static void
+ChapSendStatus(chap_state *cstate, int code)
+{
+  u_char *outp;
+  int outlen, msglen;
+  char msg[256];
+  
+  if (code == CHAP_SUCCESS) {
+    strcpy(msg, "Welcome!");
+  } else {
+    strcpy(msg, "I don't like you.  Go 'way.");
+  }
+  msglen = strlen(msg);
+  
+  outlen = CHAP_HEADERLEN + msglen;
+  outp = outpacket_buf[cstate->unit];
+  
+  MAKEHEADER(outp, PPP_CHAP);    /* paste in a header */
+  
+  PUTCHAR(code, outp);
+  PUTCHAR(cstate->chal_id, outp);
+  PUTSHORT(outlen, outp);
+  BCOPY(msg, outp, msglen);
+  pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
+  
+  CHAPDEBUG((LOG_INFO, "ChapSendStatus: Sent code %d, id %d.\n", code, cstate->chal_id));
+}
+
+/*
+ * ChapGenChallenge is used to generate a pseudo-random challenge string of
+ * a pseudo-random length between min_len and max_len.  The challenge
+ * string and its length are stored in *cstate, and various other fields of
+ * *cstate are initialized.
+ */
+
+static void
+ChapGenChallenge(chap_state *cstate)
+{
+  int chal_len;
+  u_char *ptr = cstate->challenge;
+  int i;
+  
+  /* pick a random challenge length between MIN_CHALLENGE_LENGTH and 
+     MAX_CHALLENGE_LENGTH */  
+  chal_len = (unsigned)
+        ((((magic() >> 16) *
+              (MAX_CHALLENGE_LENGTH - MIN_CHALLENGE_LENGTH)) >> 16)
+           + MIN_CHALLENGE_LENGTH);
+  cstate->chal_len = chal_len;
+  cstate->chal_id = ++cstate->id;
+  cstate->chal_transmits = 0;
+  
+  /* generate a random string */
+  for (i = 0; i < chal_len; i++ ) {
+    *ptr++ = (char) (magic() & 0xff);
+  }
+}
+
+/*
+ * ChapSendResponse - send a response packet with values as specified
+ * in *cstate.
+ */
+/* ARGSUSED */
+static void
+ChapSendResponse(chap_state *cstate)
+{
+  u_char *outp;
+  int outlen, md_len, name_len;
+  
+  md_len = cstate->resp_length;
+  name_len = strlen(cstate->resp_name);
+  outlen = CHAP_HEADERLEN + sizeof (u_char) + md_len + name_len;
+  outp = outpacket_buf[cstate->unit];
+  
+  MAKEHEADER(outp, PPP_CHAP);
+  
+  PUTCHAR(CHAP_RESPONSE, outp);  /* we are a response */
+  PUTCHAR(cstate->resp_id, outp);  /* copy id from challenge packet */
+  PUTSHORT(outlen, outp);      /* packet length */
+  
+  PUTCHAR(md_len, outp);      /* length of MD */
+  BCOPY(cstate->response, outp, md_len);    /* copy MD to buffer */
+  INCPTR(md_len, outp);
+  
+  BCOPY(cstate->resp_name, outp, name_len);  /* append our name */
+  
+  /* send the packet */
+  pppWrite(cstate->unit, outpacket_buf[cstate->unit], outlen + PPP_HDRLEN);
+  
+  cstate->clientstate = CHAPCS_RESPONSE;
+  TIMEOUT(ChapResponseTimeout, cstate, cstate->timeouttime);
+  ++cstate->resp_transmits;
+}
+
+#if 0
+static char *ChapCodenames[] = {
+  "Challenge", "Response", "Success", "Failure"
+};
+/*
+ * ChapPrintPkt - print the contents of a CHAP packet.
+ */
+static int
+ChapPrintPkt( u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
+{
+  int code, id, len;
+  int clen, nlen;
+  u_char x;
+  
+  if (plen < CHAP_HEADERLEN) {
+    return 0;
+  }
+  GETCHAR(code, p);
+  GETCHAR(id, p);
+  GETSHORT(len, p);
+  if (len < CHAP_HEADERLEN || len > plen) {
+    return 0;
+  }
+  if (code >= 1 && code <= sizeof(ChapCodenames) / sizeof(char *)) {
+    printer(arg, " %s", ChapCodenames[code-1]);
+  } else {
+    printer(arg, " code=0x%x", code);
+  }
+  printer(arg, " id=0x%x", id);
+  len -= CHAP_HEADERLEN;
+  switch (code) {
+    case CHAP_CHALLENGE:
+    case CHAP_RESPONSE:
+      if (len < 1) {
+        break;
+      }
+      clen = p[0];
+      if (len < clen + 1) {
+        break;
+      }
+      ++p;
+      nlen = len - clen - 1;
+      printer(arg, " <");
+      for (; clen > 0; --clen) {
+        GETCHAR(x, p);
+        printer(arg, "%.2x", x);
+      }
+      printer(arg, ">, name = %.*Z", nlen, p);
+      break;
+    case CHAP_FAILURE:
+    case CHAP_SUCCESS:
+      printer(arg, " %.*Z", len, p);
+      break;
+    default:
+      for (clen = len; clen > 0; --clen) {
+        GETCHAR(x, p);
+        printer(arg, " %.2x", x);
+      }
+  }
+
+  return len + CHAP_HEADERLEN;
+}
+#endif
+
+#endif /* CHAP_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chap.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chap.h
new file mode 100644
index 000000000..83dafd734
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chap.h
@@ -0,0 +1,166 @@
+/*****************************************************************************
+* chap.h - Network Challenge Handshake Authentication Protocol header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1998 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-03 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original built from BSD network code.
+******************************************************************************/
+/*
+ * chap.h - Challenge Handshake Authentication Protocol definitions.
+ *
+ * Copyright (c) 1993 The Australian National University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the Australian National University.  The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Copyright (c) 1991 Gregory M. Christy
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the author.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: chap.h,v 1.4 2007/12/19 20:47:22 fbernon Exp $
+ */
+
+#ifndef CHAP_H
+#define CHAP_H
+
+/*************************
+*** PUBLIC DEFINITIONS ***
+*************************/
+
+/* Code + ID + length */
+#define CHAP_HEADERLEN 4
+
+/*
+ * CHAP codes.
+ */
+
+#define CHAP_DIGEST_MD5      5    /* use MD5 algorithm */
+#define MD5_SIGNATURE_SIZE   16   /* 16 bytes in a MD5 message digest */
+#define CHAP_MICROSOFT       0x80 /* use Microsoft-compatible alg. */
+#define MS_CHAP_RESPONSE_LEN 49   /* Response length for MS-CHAP */
+
+#define CHAP_CHALLENGE       1
+#define CHAP_RESPONSE        2
+#define CHAP_SUCCESS         3
+#define CHAP_FAILURE         4
+
+/*
+ *  Challenge lengths (for challenges we send) and other limits.
+ */
+#define MIN_CHALLENGE_LENGTH 32
+#define MAX_CHALLENGE_LENGTH 64
+#define MAX_RESPONSE_LENGTH  64 /* sufficient for MD5 or MS-CHAP */
+
+/*
+ * Client (peer) states.
+ */
+#define CHAPCS_INITIAL       0 /* Lower layer down, not opened */
+#define CHAPCS_CLOSED        1 /* Lower layer up, not opened */
+#define CHAPCS_PENDING       2 /* Auth us to peer when lower up */
+#define CHAPCS_LISTEN        3 /* Listening for a challenge */
+#define CHAPCS_RESPONSE      4 /* Sent response, waiting for status */
+#define CHAPCS_OPEN          5 /* We've received Success */
+
+/*
+ * Server (authenticator) states.
+ */
+#define CHAPSS_INITIAL       0 /* Lower layer down, not opened */
+#define CHAPSS_CLOSED        1 /* Lower layer up, not opened */
+#define CHAPSS_PENDING       2 /* Auth peer when lower up */
+#define CHAPSS_INITIAL_CHAL  3 /* We've sent the first challenge */
+#define CHAPSS_OPEN          4 /* We've sent a Success msg */
+#define CHAPSS_RECHALLENGE   5 /* We've sent another challenge */
+#define CHAPSS_BADAUTH       6 /* We've sent a Failure msg */
+
+/************************
+*** PUBLIC DATA TYPES ***
+************************/
+
+/*
+ * Each interface is described by a chap structure.
+ */
+
+typedef struct chap_state {
+  int unit;                               /* Interface unit number */
+  int clientstate;                        /* Client state */
+  int serverstate;                        /* Server state */
+  u_char challenge[MAX_CHALLENGE_LENGTH]; /* last challenge string sent */
+  u_char chal_len;                        /* challenge length */
+  u_char chal_id;                         /* ID of last challenge */
+  u_char chal_type;                       /* hash algorithm for challenges */
+  u_char id;                              /* Current id */
+  char *chal_name;                        /* Our name to use with challenge */
+  int chal_interval;                      /* Time until we challenge peer again */
+  int timeouttime;                        /* Timeout time in seconds */
+  int max_transmits;                      /* Maximum # of challenge transmissions */
+  int chal_transmits;                     /* Number of transmissions of challenge */
+  int resp_transmits;                     /* Number of transmissions of response */
+  u_char response[MAX_RESPONSE_LENGTH];   /* Response to send */
+  u_char resp_length;                     /* length of response */
+  u_char resp_id;                         /* ID for response messages */
+  u_char resp_type;                       /* hash algorithm for responses */
+  char *resp_name;                        /* Our name to send with response */
+} chap_state;
+
+
+/******************
+*** PUBLIC DATA ***
+******************/
+extern chap_state chap[];
+
+extern struct protent chap_protent;
+
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+
+void ChapAuthWithPeer (int, char *, int);
+void ChapAuthPeer (int, char *, int);
+
+#endif /* CHAP_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chpms.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chpms.c
new file mode 100644
index 000000000..0c7521f20
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chpms.c
@@ -0,0 +1,396 @@
+/*** WARNING - THIS CODE HAS NOT BEEN FINISHED! ***/
+/*****************************************************************************
+* chpms.c - Network MicroSoft Challenge Handshake Authentication Protocol program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* Copyright (c) 1997 by Global Election Systems Inc.  All rights reserved.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original based on BSD chap_ms.c.
+*****************************************************************************/
+/*
+ * chap_ms.c - Microsoft MS-CHAP compatible implementation.
+ *
+ * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
+ * http://www.strataware.com/
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Eric Rosenquist.  The name of the author may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/*
+ * Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997
+ *
+ *   Implemented LANManager type password response to MS-CHAP challenges.
+ *   Now pppd provides both NT style and LANMan style blocks, and the
+ *   prefered is set by option "ms-lanman". Default is to use NT.
+ *   The hash text (StdText) was taken from Win95 RASAPI32.DLL.
+ *
+ *   You should also use DOMAIN\\USERNAME as described in README.MSCHAP80
+ */
+
+#define USE_CRYPT
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#if MSCHAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "md4.h"
+#ifndef USE_CRYPT
+#include "des.h"
+#endif
+#include "chap.h"
+#include "chpms.h"
+
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+
+
+/************************/
+/*** LOCAL DATA TYPES ***/
+/************************/
+typedef struct {
+    u_char LANManResp[24];
+    u_char NTResp[24];
+    u_char UseNT; /* If 1, ignore the LANMan response field */
+} MS_ChapResponse;
+/* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
+   in case this struct gets padded. */
+
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+
+/* XXX Don't know what to do with these. */
+extern void setkey(const char *);
+extern void encrypt(char *, int);
+
+static void DesEncrypt (u_char *, u_char *, u_char *);
+static void MakeKey (u_char *, u_char *);
+
+#ifdef USE_CRYPT
+static void Expand (u_char *, u_char *);
+static void Collapse (u_char *, u_char *);
+#endif
+
+static void ChallengeResponse(
+  u_char *challenge, /* IN   8 octets */
+  u_char *pwHash,    /* IN  16 octets */
+  u_char *response   /* OUT 24 octets */
+);
+static void ChapMS_NT(
+  char *rchallenge,
+  int rchallenge_len,
+  char *secret,
+  int secret_len,
+  MS_ChapResponse *response
+);
+static u_char Get7Bits(
+  u_char *input,
+  int startBit
+);
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+void
+ChapMS( chap_state *cstate, char *rchallenge, int rchallenge_len, char *secret, int secret_len)
+{
+  MS_ChapResponse response;
+#ifdef MSLANMAN
+  extern int ms_lanman;
+#endif
+
+#if 0
+  CHAPDEBUG((LOG_INFO, "ChapMS: secret is '%.*s'\n", secret_len, secret));
+#endif
+  BZERO(&response, sizeof(response));
+
+  /* Calculate both always */
+  ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response);
+
+#ifdef MSLANMAN
+  ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response);
+
+  /* prefered method is set by option  */
+  response.UseNT = !ms_lanman;
+#else
+  response.UseNT = 1;
+#endif
+
+  BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN);
+  cstate->resp_length = MS_CHAP_RESPONSE_LEN;
+}
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+static void
+ChallengeResponse( u_char *challenge, /* IN   8 octets */
+                   u_char *pwHash,    /* IN  16 octets */
+                   u_char *response   /* OUT 24 octets */)
+{
+  char    ZPasswordHash[21];
+
+  BZERO(ZPasswordHash, sizeof(ZPasswordHash));
+  BCOPY(pwHash, ZPasswordHash, 16);
+
+#if 0
+  log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG);
+#endif
+
+  DesEncrypt(challenge, ZPasswordHash +  0, response + 0);
+  DesEncrypt(challenge, ZPasswordHash +  7, response + 8);
+  DesEncrypt(challenge, ZPasswordHash + 14, response + 16);
+
+#if 0
+  log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG);
+#endif
+}
+
+
+#ifdef USE_CRYPT
+static void
+DesEncrypt( u_char *clear, /* IN  8 octets */
+            u_char *key,   /* IN  7 octets */
+            u_char *cipher /* OUT 8 octets */)
+{
+  u_char des_key[8];
+  u_char crypt_key[66];
+  u_char des_input[66];
+
+  MakeKey(key, des_key);
+
+  Expand(des_key, crypt_key);
+  setkey(crypt_key);
+
+#if 0
+  CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
+             clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
+#endif
+
+  Expand(clear, des_input);
+  encrypt(des_input, 0);
+  Collapse(des_input, cipher);
+
+#if 0
+  CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
+             cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
+#endif
+}
+
+#else /* USE_CRYPT */
+
+static void
+DesEncrypt( u_char *clear, /* IN  8 octets */
+            u_char *key,   /* IN  7 octets */
+            u_char *cipher /* OUT 8 octets */)
+{
+  des_cblock    des_key;
+  des_key_schedule  key_schedule;
+
+  MakeKey(key, des_key);
+
+  des_set_key(&des_key, key_schedule);
+
+#if 0
+  CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X\n",
+             clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
+#endif
+
+  des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
+
+#if 0
+  CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
+             cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
+#endif
+}
+
+#endif /* USE_CRYPT */
+
+
+static u_char
+Get7Bits( u_char *input, int startBit)
+{
+  register unsigned int  word;
+
+  word  = (unsigned)input[startBit / 8] << 8;
+  word |= (unsigned)input[startBit / 8 + 1];
+
+  word >>= 15 - (startBit % 8 + 7);
+
+  return word & 0xFE;
+}
+
+#ifdef USE_CRYPT
+
+/* in == 8-byte string (expanded version of the 56-bit key)
+ * out == 64-byte string where each byte is either 1 or 0
+ * Note that the low-order "bit" is always ignored by by setkey()
+ */
+static void
+Expand(u_char *in, u_char *out)
+{
+  int j, c;
+  int i;
+
+  for(i = 0; i < 64; in++){
+    c = *in;
+    for(j = 7; j >= 0; j--) {
+      *out++ = (c >> j) & 01;
+    }
+    i += 8;
+  }
+}
+
+/* The inverse of Expand
+ */
+static void
+Collapse(u_char *in, u_char *out)
+{
+  int j;
+  int i;
+  unsigned int c;
+
+  for (i = 0; i < 64; i += 8, out++) {
+    c = 0;
+    for (j = 7; j >= 0; j--, in++) {
+      c |= *in << j;
+    }
+    *out = c & 0xff;
+  }
+}
+#endif
+
+static void
+MakeKey( u_char *key,    /* IN  56 bit DES key missing parity bits */
+         u_char *des_key /* OUT 64 bit DES key with parity bits added */)
+{
+  des_key[0] = Get7Bits(key,  0);
+  des_key[1] = Get7Bits(key,  7);
+  des_key[2] = Get7Bits(key, 14);
+  des_key[3] = Get7Bits(key, 21);
+  des_key[4] = Get7Bits(key, 28);
+  des_key[5] = Get7Bits(key, 35);
+  des_key[6] = Get7Bits(key, 42);
+  des_key[7] = Get7Bits(key, 49);
+  
+#ifndef USE_CRYPT
+  des_set_odd_parity((des_cblock *)des_key);
+#endif
+  
+#if 0
+  CHAPDEBUG((LOG_INFO, "MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X\n",
+             key[0], key[1], key[2], key[3], key[4], key[5], key[6]));
+  CHAPDEBUG((LOG_INFO, "MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X\n",
+             des_key[0], des_key[1], des_key[2], des_key[3], des_key[4], des_key[5], des_key[6], des_key[7]));
+#endif
+}
+
+static void
+ChapMS_NT( char *rchallenge,
+           int rchallenge_len,
+           char *secret,
+           int secret_len,
+           MS_ChapResponse *response)
+{
+  int      i;
+  MDstruct  md4Context;
+  u_char    unicodePassword[MAX_NT_PASSWORD * 2];
+  static int  low_byte_first = -1;
+
+  /* Initialize the Unicode version of the secret (== password). */
+  /* This implicitly supports 8-bit ISO8859/1 characters. */
+  BZERO(unicodePassword, sizeof(unicodePassword));
+  for (i = 0; i < secret_len; i++) {
+    unicodePassword[i * 2] = (u_char)secret[i];
+  }
+  MDbegin(&md4Context);
+  MDupdate(&md4Context, unicodePassword, secret_len * 2 * 8);  /* Unicode is 2 bytes/char, *8 for bit count */
+
+  if (low_byte_first == -1) {
+    low_byte_first = (htons((unsigned short int)1) != 1);
+  }
+  if (low_byte_first == 0) {
+    MDreverse((u_long *)&md4Context);  /*  sfb 961105 */
+  }
+
+  MDupdate(&md4Context, NULL, 0);  /* Tell MD4 we're done */
+
+  ChallengeResponse(rchallenge, (char *)md4Context.buffer, response->NTResp);
+}
+
+#ifdef MSLANMAN
+static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
+
+static void
+ChapMS_LANMan( char *rchallenge,
+               int rchallenge_len,
+               char *secret,
+               int secret_len,
+               MS_ChapResponse  *response)
+{
+  int      i;
+  u_char    UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
+  u_char    PasswordHash[16];
+  
+  /* LANMan password is case insensitive */
+  BZERO(UcasePassword, sizeof(UcasePassword));
+  for (i = 0; i < secret_len; i++) {
+    UcasePassword[i] = (u_char)toupper(secret[i]);
+  }
+  DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 );
+  DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 );
+  ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
+}
+#endif
+
+#endif /* MSCHAP_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chpms.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chpms.h
new file mode 100644
index 000000000..df070fb35
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/chpms.h
@@ -0,0 +1,64 @@
+/*****************************************************************************
+* chpms.h - Network Microsoft Challenge Handshake Protocol header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1998 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 98-01-30 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original built from BSD network code.
+******************************************************************************/
+/*
+ * chap.h - Challenge Handshake Authentication Protocol definitions.
+ *
+ * Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
+ * http://www.strataware.com/
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Eric Rosenquist.  The name of the author may not be used to
+ * endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: chpms.h,v 1.5 2007/12/19 20:47:23 fbernon Exp $
+ */
+
+#ifndef CHPMS_H
+#define CHPMS_H
+
+#define MAX_NT_PASSWORD 256 /* Maximum number of (Unicode) chars in an NT password */
+
+void ChapMS (chap_state *, char *, int, char *, int);
+
+#endif /* CHPMS_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/fsm.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/fsm.c
new file mode 100644
index 000000000..c073f1e36
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/fsm.c
@@ -0,0 +1,906 @@
+/*****************************************************************************
+* fsm.c - Network Control Protocol Finite State Machine program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original based on BSD fsm.c.
+*****************************************************************************/
+/*
+ * fsm.c - {Link, IP} Control Protocol Finite State Machine.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/*
+ * TODO:
+ * Randomize fsm id on link/init.
+ * Deal with variable outgoing MTU.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "fsm.h"
+
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+
+#if PPP_DEBUG
+
+static const char *ppperr_strerr[] = {
+           "LS_INITIAL",  /* LS_INITIAL  0 */
+           "LS_STARTING", /* LS_STARTING 1 */
+           "LS_CLOSED",   /* LS_CLOSED   2 */
+           "LS_STOPPED",  /* LS_STOPPED  3 */
+           "LS_CLOSING",  /* LS_CLOSING  4 */
+           "LS_STOPPING", /* LS_STOPPING 5 */
+           "LS_REQSENT",  /* LS_REQSENT  6 */
+           "LS_ACKRCVD",  /* LS_ACKRCVD  7 */
+           "LS_ACKSENT",  /* LS_ACKSENT  8 */
+           "LS_OPENED"    /* LS_OPENED   9 */
+};
+
+#endif /* PPP_DEBUG */
+
+/************************/
+/*** LOCAL DATA TYPES ***/
+/************************/
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+static void fsm_timeout (void *);
+static void fsm_rconfreq (fsm *, u_char, u_char *, int);
+static void fsm_rconfack (fsm *, int, u_char *, int);
+static void fsm_rconfnakrej (fsm *, int, int, u_char *, int);
+static void fsm_rtermreq (fsm *, int, u_char *, int);
+static void fsm_rtermack (fsm *);
+static void fsm_rcoderej (fsm *, u_char *, int);
+static void fsm_sconfreq (fsm *, int);
+
+#define PROTO_NAME(f) ((f)->callbacks->proto_name)
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+int peer_mru[NUM_PPP];
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+
+/*
+ * fsm_init - Initialize fsm.
+ *
+ * Initialize fsm state.
+ */
+void
+fsm_init(fsm *f)
+{
+  f->state = LS_INITIAL;
+  f->flags = 0;
+  f->id = 0;        /* XXX Start with random id? */
+  f->timeouttime = FSM_DEFTIMEOUT;
+  f->maxconfreqtransmits = FSM_DEFMAXCONFREQS;
+  f->maxtermtransmits = FSM_DEFMAXTERMREQS;
+  f->maxnakloops = FSM_DEFMAXNAKLOOPS;
+  f->term_reason_len = 0;
+}
+
+
+/*
+ * fsm_lowerup - The lower layer is up.
+ */
+void
+fsm_lowerup(fsm *f)
+{
+  int oldState = f->state;
+
+  LWIP_UNUSED_ARG(oldState);
+
+  switch( f->state ) {
+    case LS_INITIAL:
+      f->state = LS_CLOSED;
+      break;
+
+    case LS_STARTING:
+      if( f->flags & OPT_SILENT ) {
+        f->state = LS_STOPPED;
+      } else {
+        /* Send an initial configure-request */
+        fsm_sconfreq(f, 0);
+        f->state = LS_REQSENT;
+      }
+    break;
+
+    default:
+      FSMDEBUG((LOG_INFO, "%s: Up event in state %d (%s)!\n",
+          PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+  }
+  
+  FSMDEBUG((LOG_INFO, "%s: lowerup state %d (%s) -> %d (%s)\n",
+      PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
+}
+
+
+/*
+ * fsm_lowerdown - The lower layer is down.
+ *
+ * Cancel all timeouts and inform upper layers.
+ */
+void
+fsm_lowerdown(fsm *f)
+{
+  int oldState = f->state;
+
+  LWIP_UNUSED_ARG(oldState);
+
+  switch( f->state ) {
+    case LS_CLOSED:
+      f->state = LS_INITIAL;
+      break;
+
+    case LS_STOPPED:
+      f->state = LS_STARTING;
+      if( f->callbacks->starting ) {
+        (*f->callbacks->starting)(f);
+      }
+      break;
+
+    case LS_CLOSING:
+      f->state = LS_INITIAL;
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      break;
+
+    case LS_STOPPING:
+    case LS_REQSENT:
+    case LS_ACKRCVD:
+    case LS_ACKSENT:
+      f->state = LS_STARTING;
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      break;
+
+    case LS_OPENED:
+      if( f->callbacks->down ) {
+        (*f->callbacks->down)(f);
+      }
+      f->state = LS_STARTING;
+      break;
+
+    default:
+      FSMDEBUG((LOG_INFO, "%s: Down event in state %d (%s)!\n",
+          PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+  }
+
+  FSMDEBUG((LOG_INFO, "%s: lowerdown state %d (%s) -> %d (%s)\n",
+      PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
+}
+
+
+/*
+ * fsm_open - Link is allowed to come up.
+ */
+void
+fsm_open(fsm *f)
+{
+  int oldState = f->state;
+
+  LWIP_UNUSED_ARG(oldState);
+
+  switch( f->state ) {
+    case LS_INITIAL:
+      f->state = LS_STARTING;
+      if( f->callbacks->starting ) {
+        (*f->callbacks->starting)(f);
+      }
+      break;
+
+    case LS_CLOSED:
+      if( f->flags & OPT_SILENT ) {
+        f->state = LS_STOPPED;
+      } else {
+        /* Send an initial configure-request */
+        fsm_sconfreq(f, 0);
+        f->state = LS_REQSENT;
+      }
+      break;
+  
+    case LS_CLOSING:
+      f->state = LS_STOPPING;
+      /* fall through */
+    case LS_STOPPED:
+    case LS_OPENED:
+      if( f->flags & OPT_RESTART ) {
+        fsm_lowerdown(f);
+        fsm_lowerup(f);
+      }
+      break;
+  }
+
+  FSMDEBUG((LOG_INFO, "%s: open state %d (%s) -> %d (%s)\n",
+      PROTO_NAME(f), oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
+}
+
+
+/*
+ * fsm_close - Start closing connection.
+ *
+ * Cancel timeouts and either initiate close or possibly go directly to
+ * the LS_CLOSED state.
+ */
+void
+fsm_close(fsm *f, char *reason)
+{
+  int oldState = f->state;
+
+  LWIP_UNUSED_ARG(oldState);
+
+  f->term_reason = reason;
+  f->term_reason_len = (reason == NULL? 0: strlen(reason));
+  switch( f->state ) {
+    case LS_STARTING:
+      f->state = LS_INITIAL;
+      break;
+    case LS_STOPPED:
+      f->state = LS_CLOSED;
+      break;
+    case LS_STOPPING:
+      f->state = LS_CLOSING;
+      break;
+
+    case LS_REQSENT:
+    case LS_ACKRCVD:
+    case LS_ACKSENT:
+    case LS_OPENED:
+      if( f->state != LS_OPENED ) {
+        UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      } else if( f->callbacks->down ) {
+        (*f->callbacks->down)(f);  /* Inform upper layers we're down */
+      }
+      /* Init restart counter, send Terminate-Request */
+      f->retransmits = f->maxtermtransmits;
+      fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
+            (u_char *) f->term_reason, f->term_reason_len);
+      TIMEOUT(fsm_timeout, f, f->timeouttime);
+      --f->retransmits;
+
+      f->state = LS_CLOSING;
+      break;
+  }
+
+  FSMDEBUG((LOG_INFO, "%s: close reason=%s state %d (%s) -> %d (%s)\n",
+      PROTO_NAME(f), reason, oldState, ppperr_strerr[oldState], f->state, ppperr_strerr[f->state]));
+}
+
+
+/*
+ * fsm_sdata - Send some data.
+ *
+ * Used for all packets sent to our peer by this module.
+ */
+void
+fsm_sdata( fsm *f, u_char code, u_char id, u_char *data, int datalen)
+{
+  u_char *outp;
+  int outlen;
+
+  /* Adjust length to be smaller than MTU */
+  outp = outpacket_buf[f->unit];
+  if (datalen > peer_mru[f->unit] - (int)HEADERLEN) {
+    datalen = peer_mru[f->unit] - HEADERLEN;
+  }
+  if (datalen && data != outp + PPP_HDRLEN + HEADERLEN) {
+    BCOPY(data, outp + PPP_HDRLEN + HEADERLEN, datalen);
+  }
+  outlen = datalen + HEADERLEN;
+  MAKEHEADER(outp, f->protocol);
+  PUTCHAR(code, outp);
+  PUTCHAR(id, outp);
+  PUTSHORT(outlen, outp);
+  pppWrite(f->unit, outpacket_buf[f->unit], outlen + PPP_HDRLEN);
+  FSMDEBUG((LOG_INFO, "fsm_sdata(%s): Sent code %d,%d,%d.\n",
+        PROTO_NAME(f), code, id, outlen));
+}
+
+
+/*
+ * fsm_input - Input packet.
+ */
+void
+fsm_input(fsm *f, u_char *inpacket, int l)
+{
+  u_char *inp = inpacket;
+  u_char code, id;
+  int len;
+
+  /*
+  * Parse header (code, id and length).
+  * If packet too short, drop it.
+  */
+  if (l < HEADERLEN) {
+    FSMDEBUG((LOG_WARNING, "fsm_input(%x): Rcvd short header.\n",
+          f->protocol));
+    return;
+  }
+  GETCHAR(code, inp);
+  GETCHAR(id, inp);
+  GETSHORT(len, inp);
+  if (len < HEADERLEN) {
+    FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd illegal length.\n",
+        f->protocol));
+    return;
+  }
+  if (len > l) {
+    FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd short packet.\n",
+        f->protocol));
+    return;
+  }
+  len -= HEADERLEN;    /* subtract header length */
+
+  if( f->state == LS_INITIAL || f->state == LS_STARTING ) {
+    FSMDEBUG((LOG_INFO, "fsm_input(%x): Rcvd packet in state %d (%s).\n",
+        f->protocol, f->state, ppperr_strerr[f->state]));
+    return;
+  }
+  FSMDEBUG((LOG_INFO, "fsm_input(%s):%d,%d,%d\n", PROTO_NAME(f), code, id, l));
+  /*
+   * Action depends on code.
+   */
+  switch (code) {
+    case CONFREQ:
+      fsm_rconfreq(f, id, inp, len);
+      break;
+    
+    case CONFACK:
+      fsm_rconfack(f, id, inp, len);
+      break;
+    
+    case CONFNAK:
+    case CONFREJ:
+      fsm_rconfnakrej(f, code, id, inp, len);
+      break;
+    
+    case TERMREQ:
+      fsm_rtermreq(f, id, inp, len);
+      break;
+    
+    case TERMACK:
+      fsm_rtermack(f);
+      break;
+    
+    case CODEREJ:
+      fsm_rcoderej(f, inp, len);
+      break;
+    
+    default:
+      if( !f->callbacks->extcode ||
+          !(*f->callbacks->extcode)(f, code, id, inp, len) ) {
+        fsm_sdata(f, CODEREJ, ++f->id, inpacket, len + HEADERLEN);
+      }
+      break;
+  }
+}
+
+
+/*
+ * fsm_protreject - Peer doesn't speak this protocol.
+ *
+ * Treat this as a catastrophic error (RXJ-).
+ */
+void
+fsm_protreject(fsm *f)
+{
+  switch( f->state ) {
+    case LS_CLOSING:
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      /* fall through */
+    case LS_CLOSED:
+      f->state = LS_CLOSED;
+      if( f->callbacks->finished ) {
+        (*f->callbacks->finished)(f);
+      }
+      break;
+
+    case LS_STOPPING:
+    case LS_REQSENT:
+    case LS_ACKRCVD:
+    case LS_ACKSENT:
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      /* fall through */
+    case LS_STOPPED:
+      f->state = LS_STOPPED;
+      if( f->callbacks->finished ) {
+        (*f->callbacks->finished)(f);
+      }
+      break;
+    
+    case LS_OPENED:
+      if( f->callbacks->down ) {
+        (*f->callbacks->down)(f);
+      }
+      /* Init restart counter, send Terminate-Request */
+      f->retransmits = f->maxtermtransmits;
+      fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
+            (u_char *) f->term_reason, f->term_reason_len);
+      TIMEOUT(fsm_timeout, f, f->timeouttime);
+      --f->retransmits;
+      
+      f->state = LS_STOPPING;
+      break;
+    
+    default:
+      FSMDEBUG((LOG_INFO, "%s: Protocol-reject event in state %d (%s)!\n",
+            PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+    }
+}
+
+
+
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+
+/*
+ * fsm_timeout - Timeout expired.
+ */
+static void
+fsm_timeout(void *arg)
+{
+  fsm *f = (fsm *) arg;
+
+  switch (f->state) {
+    case LS_CLOSING:
+    case LS_STOPPING:
+      if( f->retransmits <= 0 ) {
+        FSMDEBUG((LOG_WARNING, "%s: timeout sending Terminate-Request state=%d (%s)\n",
+             PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+        /*
+         * We've waited for an ack long enough.  Peer probably heard us.
+         */
+        f->state = (f->state == LS_CLOSING)? LS_CLOSED: LS_STOPPED;
+        if( f->callbacks->finished ) {
+          (*f->callbacks->finished)(f);
+        }
+      } else {
+        FSMDEBUG((LOG_WARNING, "%s: timeout resending Terminate-Requests state=%d (%s)\n",
+             PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+        /* Send Terminate-Request */
+        fsm_sdata(f, TERMREQ, f->reqid = ++f->id,
+            (u_char *) f->term_reason, f->term_reason_len);
+        TIMEOUT(fsm_timeout, f, f->timeouttime);
+        --f->retransmits;
+      }
+      break;
+
+    case LS_REQSENT:
+    case LS_ACKRCVD:
+    case LS_ACKSENT:
+      if (f->retransmits <= 0) {
+        FSMDEBUG((LOG_WARNING, "%s: timeout sending Config-Requests state=%d (%s)\n",
+         PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+        f->state = LS_STOPPED;
+        if( (f->flags & OPT_PASSIVE) == 0 && f->callbacks->finished ) {
+          (*f->callbacks->finished)(f);
+        }
+      } else {
+        FSMDEBUG((LOG_WARNING, "%s: timeout resending Config-Request state=%d (%s)\n",
+         PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+        /* Retransmit the configure-request */
+        if (f->callbacks->retransmit) {
+          (*f->callbacks->retransmit)(f);
+        }
+        fsm_sconfreq(f, 1);    /* Re-send Configure-Request */
+        if( f->state == LS_ACKRCVD ) {
+          f->state = LS_REQSENT;
+        }
+      }
+      break;
+
+    default:
+      FSMDEBUG((LOG_INFO, "%s: Timeout event in state %d (%s)!\n",
+          PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+  }
+}
+
+
+/*
+ * fsm_rconfreq - Receive Configure-Request.
+ */
+static void
+fsm_rconfreq(fsm *f, u_char id, u_char *inp, int len)
+{
+  int code, reject_if_disagree;
+
+  FSMDEBUG((LOG_INFO, "fsm_rconfreq(%s): Rcvd id %d state=%d (%s)\n", 
+        PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
+  switch( f->state ) {
+    case LS_CLOSED:
+      /* Go away, we're closed */
+      fsm_sdata(f, TERMACK, id, NULL, 0);
+      return;
+    case LS_CLOSING:
+    case LS_STOPPING:
+      return;
+
+    case LS_OPENED:
+      /* Go down and restart negotiation */
+      if( f->callbacks->down ) {
+        (*f->callbacks->down)(f);  /* Inform upper layers */
+      }
+      fsm_sconfreq(f, 0);    /* Send initial Configure-Request */
+      break;
+
+    case LS_STOPPED:
+      /* Negotiation started by our peer */
+      fsm_sconfreq(f, 0);    /* Send initial Configure-Request */
+      f->state = LS_REQSENT;
+      break;
+  }
+  
+  /*
+  * Pass the requested configuration options
+  * to protocol-specific code for checking.
+  */
+  if (f->callbacks->reqci) {    /* Check CI */
+    reject_if_disagree = (f->nakloops >= f->maxnakloops);
+    code = (*f->callbacks->reqci)(f, inp, &len, reject_if_disagree);
+  } else if (len) {
+    code = CONFREJ;      /* Reject all CI */
+  } else {
+    code = CONFACK;
+  }
+  
+  /* send the Ack, Nak or Rej to the peer */
+  fsm_sdata(f, (u_char)code, id, inp, len);
+  
+  if (code == CONFACK) {
+    if (f->state == LS_ACKRCVD) {
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      f->state = LS_OPENED;
+      if (f->callbacks->up) {
+        (*f->callbacks->up)(f);  /* Inform upper layers */
+      }
+    } else {
+      f->state = LS_ACKSENT;
+    }
+    f->nakloops = 0;
+  } else {
+    /* we sent CONFACK or CONFREJ */
+    if (f->state != LS_ACKRCVD) {
+      f->state = LS_REQSENT;
+    }
+    if( code == CONFNAK ) {
+      ++f->nakloops;
+    }
+  }
+}
+
+
+/*
+ * fsm_rconfack - Receive Configure-Ack.
+ */
+static void
+fsm_rconfack(fsm *f, int id, u_char *inp, int len)
+{
+  FSMDEBUG((LOG_INFO, "fsm_rconfack(%s): Rcvd id %d state=%d (%s)\n",
+        PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
+  
+  if (id != f->reqid || f->seen_ack) {   /* Expected id? */
+    return; /* Nope, toss... */
+  }
+  if( !(f->callbacks->ackci? (*f->callbacks->ackci)(f, inp, len): (len == 0)) ) {
+    /* Ack is bad - ignore it */
+    FSMDEBUG((LOG_INFO, "%s: received bad Ack (length %d)\n",
+          PROTO_NAME(f), len));
+    return;
+  }
+  f->seen_ack = 1;
+  
+  switch (f->state) {
+    case LS_CLOSED:
+    case LS_STOPPED:
+      fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
+      break;
+    
+    case LS_REQSENT:
+      f->state = LS_ACKRCVD;
+      f->retransmits = f->maxconfreqtransmits;
+      break;
+    
+    case LS_ACKRCVD:
+      /* Huh? an extra valid Ack? oh well... */
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      fsm_sconfreq(f, 0);
+      f->state = LS_REQSENT;
+      break;
+    
+    case LS_ACKSENT:
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      f->state = LS_OPENED;
+      f->retransmits = f->maxconfreqtransmits;
+      if (f->callbacks->up) {
+        (*f->callbacks->up)(f);  /* Inform upper layers */
+      }
+      break;
+    
+    case LS_OPENED:
+      /* Go down and restart negotiation */
+      if (f->callbacks->down) {
+        (*f->callbacks->down)(f);  /* Inform upper layers */
+      }
+      fsm_sconfreq(f, 0);    /* Send initial Configure-Request */
+      f->state = LS_REQSENT;
+      break;
+  }
+}
+
+
+/*
+ * fsm_rconfnakrej - Receive Configure-Nak or Configure-Reject.
+ */
+static void
+fsm_rconfnakrej(fsm *f, int code, int id, u_char *inp, int len)
+{
+  int (*proc) (fsm *, u_char *, int);
+  int ret;
+
+  FSMDEBUG((LOG_INFO, "fsm_rconfnakrej(%s): Rcvd id %d state=%d (%s)\n",
+        PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
+
+  if (id != f->reqid || f->seen_ack) { /* Expected id? */
+    return;        /* Nope, toss... */
+  }
+  proc = (code == CONFNAK)? f->callbacks->nakci: f->callbacks->rejci;
+  if (!proc || !((ret = proc(f, inp, len)))) {
+    /* Nak/reject is bad - ignore it */
+    FSMDEBUG((LOG_INFO, "%s: received bad %s (length %d)\n",
+          PROTO_NAME(f), (code==CONFNAK? "Nak": "reject"), len));
+    return;
+  }
+  f->seen_ack = 1;
+
+  switch (f->state) {
+    case LS_CLOSED:
+    case LS_STOPPED:
+      fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
+      break;
+    
+    case LS_REQSENT:
+    case LS_ACKSENT:
+      /* They didn't agree to what we wanted - try another request */
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      if (ret < 0) {
+        f->state = LS_STOPPED;    /* kludge for stopping CCP */
+      } else {
+        fsm_sconfreq(f, 0);    /* Send Configure-Request */
+      }
+      break;
+    
+    case LS_ACKRCVD:
+      /* Got a Nak/reject when we had already had an Ack?? oh well... */
+      UNTIMEOUT(fsm_timeout, f);  /* Cancel timeout */
+      fsm_sconfreq(f, 0);
+      f->state = LS_REQSENT;
+      break;
+    
+    case LS_OPENED:
+      /* Go down and restart negotiation */
+      if (f->callbacks->down) {
+        (*f->callbacks->down)(f);  /* Inform upper layers */
+      }
+      fsm_sconfreq(f, 0);    /* Send initial Configure-Request */
+      f->state = LS_REQSENT;
+      break;
+  }
+}
+
+
+/*
+ * fsm_rtermreq - Receive Terminate-Req.
+ */
+static void
+fsm_rtermreq(fsm *f, int id, u_char *p, int len)
+{
+  LWIP_UNUSED_ARG(p);
+
+  FSMDEBUG((LOG_INFO, "fsm_rtermreq(%s): Rcvd id %d state=%d (%s)\n",
+        PROTO_NAME(f), id, f->state, ppperr_strerr[f->state]));
+
+  switch (f->state) {
+    case LS_ACKRCVD:
+    case LS_ACKSENT:
+      f->state = LS_REQSENT;    /* Start over but keep trying */
+      break;
+
+    case LS_OPENED:
+      if (len > 0) {
+        FSMDEBUG((LOG_INFO, "%s terminated by peer (%x)\n", PROTO_NAME(f), p));
+      } else {
+        FSMDEBUG((LOG_INFO, "%s terminated by peer\n", PROTO_NAME(f)));
+      }
+      if (f->callbacks->down) {
+        (*f->callbacks->down)(f);  /* Inform upper layers */
+      }
+      f->retransmits = 0;
+      f->state = LS_STOPPING;
+      TIMEOUT(fsm_timeout, f, f->timeouttime);
+      break;
+  }
+
+  fsm_sdata(f, TERMACK, (u_char)id, NULL, 0);
+}
+
+
+/*
+ * fsm_rtermack - Receive Terminate-Ack.
+ */
+static void
+fsm_rtermack(fsm *f)
+{
+  FSMDEBUG((LOG_INFO, "fsm_rtermack(%s): state=%d (%s)\n", 
+        PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+  
+  switch (f->state) {
+    case LS_CLOSING:
+      UNTIMEOUT(fsm_timeout, f);
+      f->state = LS_CLOSED;
+      if( f->callbacks->finished ) {
+        (*f->callbacks->finished)(f);
+      }
+      break;
+
+    case LS_STOPPING:
+      UNTIMEOUT(fsm_timeout, f);
+      f->state = LS_STOPPED;
+      if( f->callbacks->finished ) {
+        (*f->callbacks->finished)(f);
+      }
+      break;
+    
+    case LS_ACKRCVD:
+      f->state = LS_REQSENT;
+      break;
+    
+    case LS_OPENED:
+      if (f->callbacks->down) {
+        (*f->callbacks->down)(f);  /* Inform upper layers */
+      }
+      fsm_sconfreq(f, 0);
+      break;
+  }
+}
+
+
+/*
+ * fsm_rcoderej - Receive an Code-Reject.
+ */
+static void
+fsm_rcoderej(fsm *f, u_char *inp, int len)
+{
+  u_char code, id;
+  
+  FSMDEBUG((LOG_INFO, "fsm_rcoderej(%s): state=%d (%s)\n", 
+        PROTO_NAME(f), f->state, ppperr_strerr[f->state]));
+  
+  if (len < HEADERLEN) {
+    FSMDEBUG((LOG_INFO, "fsm_rcoderej: Rcvd short Code-Reject packet!\n"));
+    return;
+  }
+  GETCHAR(code, inp);
+  GETCHAR(id, inp);
+  FSMDEBUG((LOG_WARNING, "%s: Rcvd Code-Reject for code %d, id %d\n",
+        PROTO_NAME(f), code, id));
+  
+  if( f->state == LS_ACKRCVD ) {
+    f->state = LS_REQSENT;
+  }
+}
+
+
+/*
+ * fsm_sconfreq - Send a Configure-Request.
+ */
+static void
+fsm_sconfreq(fsm *f, int retransmit)
+{
+  u_char *outp;
+  int cilen;
+  
+  if( f->state != LS_REQSENT && f->state != LS_ACKRCVD && f->state != LS_ACKSENT ) {
+    /* Not currently negotiating - reset options */
+    if( f->callbacks->resetci ) {
+      (*f->callbacks->resetci)(f);
+    }
+    f->nakloops = 0;
+  }
+  
+  if( !retransmit ) {
+    /* New request - reset retransmission counter, use new ID */
+    f->retransmits = f->maxconfreqtransmits;
+    f->reqid = ++f->id;
+  }
+  
+  f->seen_ack = 0;
+  
+  /*
+   * Make up the request packet
+   */
+  outp = outpacket_buf[f->unit] + PPP_HDRLEN + HEADERLEN;
+  if( f->callbacks->cilen && f->callbacks->addci ) {
+    cilen = (*f->callbacks->cilen)(f);
+    if( cilen > peer_mru[f->unit] - (int)HEADERLEN ) {
+      cilen = peer_mru[f->unit] - HEADERLEN;
+    }
+    if (f->callbacks->addci) {
+      (*f->callbacks->addci)(f, outp, &cilen);
+    }
+  } else {
+    cilen = 0;
+  }
+
+  /* send the request to our peer */
+  fsm_sdata(f, CONFREQ, f->reqid, outp, cilen);
+  
+  /* start the retransmit timer */
+  --f->retransmits;
+  TIMEOUT(fsm_timeout, f, f->timeouttime);
+  
+  FSMDEBUG((LOG_INFO, "%s: sending Configure-Request, id %d\n",
+        PROTO_NAME(f), f->reqid));
+}
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/fsm.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/fsm.h
new file mode 100644
index 000000000..14034ec7f
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/fsm.h
@@ -0,0 +1,169 @@
+/*****************************************************************************
+* fsm.h - Network Control Protocol Finite State Machine header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* Copyright (c) 1997 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
+*   Original based on BSD code.
+*****************************************************************************/
+/*
+ * fsm.h - {Link, IP} Control Protocol Finite State Machine definitions.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: fsm.h,v 1.4 2007/12/19 20:47:23 fbernon Exp $
+ */
+
+#ifndef FSM_H
+#define FSM_H
+
+/*****************************************************************************
+************************* PUBLIC DEFINITIONS *********************************
+*****************************************************************************/
+/*
+ * LCP Packet header = Code, id, length.
+ */
+#define HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
+
+
+/*
+ *  CP (LCP, IPCP, etc.) codes.
+ */
+#define CONFREQ     1 /* Configuration Request */
+#define CONFACK     2 /* Configuration Ack */
+#define CONFNAK     3 /* Configuration Nak */
+#define CONFREJ     4 /* Configuration Reject */
+#define TERMREQ     5 /* Termination Request */
+#define TERMACK     6 /* Termination Ack */
+#define CODEREJ     7 /* Code Reject */
+
+/*
+ * Link states.
+ */
+#define LS_INITIAL  0 /* Down, hasn't been opened */
+#define LS_STARTING 1 /* Down, been opened */
+#define LS_CLOSED   2 /* Up, hasn't been opened */
+#define LS_STOPPED  3 /* Open, waiting for down event */
+#define LS_CLOSING  4 /* Terminating the connection, not open */
+#define LS_STOPPING 5 /* Terminating, but open */
+#define LS_REQSENT  6 /* We've sent a Config Request */
+#define LS_ACKRCVD  7 /* We've received a Config Ack */
+#define LS_ACKSENT  8 /* We've sent a Config Ack */
+#define LS_OPENED   9 /* Connection available */
+
+/*
+ * Flags - indicate options controlling FSM operation
+ */
+#define OPT_PASSIVE 1 /* Don't die if we don't get a response */
+#define OPT_RESTART 2 /* Treat 2nd OPEN as DOWN, UP */
+#define OPT_SILENT  4 /* Wait for peer to speak first */
+
+
+/*****************************************************************************
+************************* PUBLIC DATA TYPES **********************************
+*****************************************************************************/
+/*
+ * Each FSM is described by an fsm structure and fsm callbacks.
+ */
+typedef struct fsm {
+  int unit;                        /* Interface unit number */
+  u_short protocol;                /* Data Link Layer Protocol field value */
+  int state;                       /* State */
+  int flags;                       /* Contains option bits */
+  u_char id;                       /* Current id */
+  u_char reqid;                    /* Current request id */
+  u_char seen_ack;                 /* Have received valid Ack/Nak/Rej to Req */
+  int timeouttime;                 /* Timeout time in milliseconds */
+  int maxconfreqtransmits;         /* Maximum Configure-Request transmissions */
+  int retransmits;                 /* Number of retransmissions left */
+  int maxtermtransmits;            /* Maximum Terminate-Request transmissions */
+  int nakloops;                    /* Number of nak loops since last ack */
+  int maxnakloops;                 /* Maximum number of nak loops tolerated */
+  struct fsm_callbacks* callbacks; /* Callback routines */
+  char* term_reason;               /* Reason for closing protocol */
+  int term_reason_len;             /* Length of term_reason */
+} fsm;
+
+
+typedef struct fsm_callbacks {
+  void (*resetci)(fsm*);                            /* Reset our Configuration Information */
+  int  (*cilen)(fsm*);                              /* Length of our Configuration Information */
+  void (*addci)(fsm*, u_char*, int*);               /* Add our Configuration Information */
+  int  (*ackci)(fsm*, u_char*, int);                /* ACK our Configuration Information */
+  int  (*nakci)(fsm*, u_char*, int);                /* NAK our Configuration Information */
+  int  (*rejci)(fsm*, u_char*, int);                /* Reject our Configuration Information */
+  int  (*reqci)(fsm*, u_char*, int*, int);          /* Request peer's Configuration Information */
+  void (*up)(fsm*);                                 /* Called when fsm reaches LS_OPENED state */
+  void (*down)(fsm*);                               /* Called when fsm leaves LS_OPENED state */
+  void (*starting)(fsm*);                           /* Called when we want the lower layer */
+  void (*finished)(fsm*);                           /* Called when we don't want the lower layer */
+  void (*protreject)(int);                          /* Called when Protocol-Reject received */
+  void (*retransmit)(fsm*);                         /* Retransmission is necessary */
+  int  (*extcode)(fsm*, int, u_char, u_char*, int); /* Called when unknown code received */
+  char *proto_name;                                 /* String name for protocol (for messages) */
+} fsm_callbacks;
+
+
+/*****************************************************************************
+*********************** PUBLIC DATA STRUCTURES *******************************
+*****************************************************************************/
+/*
+ * Variables
+ */
+extern int peer_mru[]; /* currently negotiated peer MRU (per unit) */
+
+
+/*****************************************************************************
+************************** PUBLIC FUNCTIONS **********************************
+*****************************************************************************/
+
+/*
+ * Prototypes
+ */
+void fsm_init (fsm*);
+void fsm_lowerup (fsm*);
+void fsm_lowerdown (fsm*);
+void fsm_open (fsm*);
+void fsm_close (fsm*, char*);
+void fsm_input (fsm*, u_char*, int);
+void fsm_protreject (fsm*);
+void fsm_sdata (fsm*, u_char, u_char, u_char*, int);
+
+#endif /* FSM_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ipcp.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ipcp.c
new file mode 100644
index 000000000..3a403a0a6
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ipcp.c
@@ -0,0 +1,1440 @@
+/*****************************************************************************
+* ipcp.c - Network PPP IP Control Protocol program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-08 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original.
+*****************************************************************************/
+/*
+ * ipcp.c - PPP IP Control Protocol.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "auth.h"
+#include "fsm.h"
+#include "vj.h"
+#include "ipcp.h"
+
+#include <string.h>
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+/* #define OLD_CI_ADDRS 1 */ /* Support deprecated address negotiation. */
+
+/*
+ * Lengths of configuration options.
+ */
+#define CILEN_VOID     2
+#define CILEN_COMPRESS 4  /* min length for compression protocol opt. */
+#define CILEN_VJ       6  /* length for RFC1332 Van-Jacobson opt. */
+#define CILEN_ADDR     6  /* new-style single address option */
+#define CILEN_ADDRS    10 /* old-style dual address option */
+
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+/*
+ * Callbacks for fsm code.  (CI = Configuration Information)
+ */
+static void ipcp_resetci (fsm *);                     /* Reset our CI */
+static int  ipcp_cilen (fsm *);                       /* Return length of our CI */
+static void ipcp_addci (fsm *, u_char *, int *);      /* Add our CI */
+static int  ipcp_ackci (fsm *, u_char *, int);        /* Peer ack'd our CI */
+static int  ipcp_nakci (fsm *, u_char *, int);        /* Peer nak'd our CI */
+static int  ipcp_rejci (fsm *, u_char *, int);        /* Peer rej'd our CI */
+static int  ipcp_reqci (fsm *, u_char *, int *, int); /* Rcv CI */
+static void ipcp_up (fsm *);                          /* We're UP */
+static void ipcp_down (fsm *);                        /* We're DOWN */
+#if 0
+static void ipcp_script (fsm *, char *); /* Run an up/down script */
+#endif
+static void ipcp_finished (fsm *);                    /* Don't need lower layer */
+
+/*
+ * Protocol entry points from main code.
+ */
+static void ipcp_init (int);
+static void ipcp_open (int);
+static void ipcp_close (int, char *);
+static void ipcp_lowerup (int);
+static void ipcp_lowerdown (int);
+static void ipcp_input (int, u_char *, int);
+static void ipcp_protrej (int);
+
+static void ipcp_clear_addrs (int);
+
+#define CODENAME(x) ((x) == CONFACK ? "ACK" : \
+                     (x) == CONFNAK ? "NAK" : "REJ")
+
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+/* global vars */
+ipcp_options ipcp_wantoptions[NUM_PPP];  /* Options that we want to request */
+ipcp_options ipcp_gotoptions[NUM_PPP];   /* Options that peer ack'd */
+ipcp_options ipcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
+ipcp_options ipcp_hisoptions[NUM_PPP];   /* Options that we ack'd */
+
+fsm ipcp_fsm[NUM_PPP]; /* IPCP fsm structure */
+
+struct protent ipcp_protent = {
+  PPP_IPCP,
+  ipcp_init,
+  ipcp_input,
+  ipcp_protrej,
+  ipcp_lowerup,
+  ipcp_lowerdown,
+  ipcp_open,
+  ipcp_close,
+#if 0
+  ipcp_printpkt,
+  NULL,
+#endif
+  1,
+  "IPCP",
+#if 0
+  ip_check_options,
+  NULL,
+  ip_active_pkt
+#endif
+};
+
+
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+/* local vars */
+static int cis_received[NUM_PPP];      /* # Conf-Reqs received */
+static int default_route_set[NUM_PPP]; /* Have set up a default route */
+
+static fsm_callbacks ipcp_callbacks = { /* IPCP callback routines */
+  ipcp_resetci,  /* Reset our Configuration Information */
+  ipcp_cilen,    /* Length of our Configuration Information */
+  ipcp_addci,    /* Add our Configuration Information */
+  ipcp_ackci,    /* ACK our Configuration Information */
+  ipcp_nakci,    /* NAK our Configuration Information */
+  ipcp_rejci,    /* Reject our Configuration Information */
+  ipcp_reqci,    /* Request peer's Configuration Information */
+  ipcp_up,       /* Called when fsm reaches LS_OPENED state */
+  ipcp_down,     /* Called when fsm leaves LS_OPENED state */
+  NULL,          /* Called when we want the lower layer up */
+  ipcp_finished, /* Called when we want the lower layer down */
+  NULL,          /* Called when Protocol-Reject received */
+  NULL,          /* Retransmission is necessary */
+  NULL,          /* Called to handle protocol-specific codes */
+  "IPCP"         /* String name of protocol */
+};
+
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+
+/*
+ * Non-standard inet_ntoa left here for compat with original ppp
+ * sources. Assumes u32_t instead of struct in_addr.
+ */ 
+
+char *
+_inet_ntoa(u32_t n)
+{
+  struct in_addr ia;
+  ia.s_addr = n;
+  return inet_ntoa(ia);
+}
+
+#define inet_ntoa _inet_ntoa
+
+/*
+ * ipcp_init - Initialize IPCP.
+ */
+static void
+ipcp_init(int unit)
+{
+  fsm           *f = &ipcp_fsm[unit];
+  ipcp_options *wo = &ipcp_wantoptions[unit];
+  ipcp_options *ao = &ipcp_allowoptions[unit];
+
+  f->unit      = unit;
+  f->protocol  = PPP_IPCP;
+  f->callbacks = &ipcp_callbacks;
+  fsm_init(&ipcp_fsm[unit]);
+
+  memset(wo, 0, sizeof(*wo));
+  memset(ao, 0, sizeof(*ao));
+
+  wo->neg_addr      = 1;
+  wo->ouraddr       = 0;
+#if VJ_SUPPORT
+  wo->neg_vj        = 1;
+#else  /* VJ_SUPPORT */
+  wo->neg_vj        = 0;
+#endif /* VJ_SUPPORT */
+  wo->vj_protocol   = IPCP_VJ_COMP;
+  wo->maxslotindex  = MAX_SLOTS - 1;
+  wo->cflag         = 0;
+  wo->default_route = 1;
+
+  ao->neg_addr      = 1;
+#if VJ_SUPPORT
+  ao->neg_vj        = 1;
+#else  /* VJ_SUPPORT */
+  ao->neg_vj        = 0;
+#endif /* VJ_SUPPORT */
+  ao->maxslotindex  = MAX_SLOTS - 1;
+  ao->cflag         = 1;
+  ao->default_route = 1;
+}
+
+
+/*
+ * ipcp_open - IPCP is allowed to come up.
+ */
+static void
+ipcp_open(int unit)
+{
+  fsm_open(&ipcp_fsm[unit]);
+}
+
+
+/*
+ * ipcp_close - Take IPCP down.
+ */
+static void
+ipcp_close(int unit, char *reason)
+{
+  fsm_close(&ipcp_fsm[unit], reason);
+}
+
+
+/*
+ * ipcp_lowerup - The lower layer is up.
+ */
+static void
+ipcp_lowerup(int unit)
+{
+  fsm_lowerup(&ipcp_fsm[unit]);
+}
+
+
+/*
+ * ipcp_lowerdown - The lower layer is down.
+ */
+static void
+ipcp_lowerdown(int unit)
+{
+  fsm_lowerdown(&ipcp_fsm[unit]);
+}
+
+
+/*
+ * ipcp_input - Input IPCP packet.
+ */
+static void
+ipcp_input(int unit, u_char *p, int len)
+{
+  fsm_input(&ipcp_fsm[unit], p, len);
+}
+
+
+/*
+ * ipcp_protrej - A Protocol-Reject was received for IPCP.
+ *
+ * Pretend the lower layer went down, so we shut up.
+ */
+static void
+ipcp_protrej(int unit)
+{
+  fsm_lowerdown(&ipcp_fsm[unit]);
+}
+
+
+/*
+ * ipcp_resetci - Reset our CI.
+ */
+static void
+ipcp_resetci(fsm *f)
+{
+  ipcp_options *wo = &ipcp_wantoptions[f->unit];
+  
+  wo->req_addr = wo->neg_addr && ipcp_allowoptions[f->unit].neg_addr;
+  if (wo->ouraddr == 0) {
+    wo->accept_local = 1;
+  }
+  if (wo->hisaddr == 0) {
+    wo->accept_remote = 1;
+  }
+  /* Request DNS addresses from the peer */
+  wo->req_dns1 = ppp_settings.usepeerdns;
+  wo->req_dns2 = ppp_settings.usepeerdns;
+  ipcp_gotoptions[f->unit] = *wo;
+  cis_received[f->unit] = 0;
+}
+
+
+/*
+ * ipcp_cilen - Return length of our CI.
+ */
+static int
+ipcp_cilen(fsm *f)
+{
+  ipcp_options *go = &ipcp_gotoptions[f->unit];
+  ipcp_options *wo = &ipcp_wantoptions[f->unit];
+  ipcp_options *ho = &ipcp_hisoptions[f->unit];
+
+#define LENCIVJ(neg, old)   (neg ? (old? CILEN_COMPRESS : CILEN_VJ) : 0)
+#define LENCIADDR(neg, old) (neg ? (old? CILEN_ADDRS : CILEN_ADDR) : 0)
+#define LENCIDNS(neg)       (neg ? (CILEN_ADDR) : 0)
+
+  /*
+   * First see if we want to change our options to the old
+   * forms because we have received old forms from the peer.
+   */
+  if (wo->neg_addr && !go->neg_addr && !go->old_addrs) {
+    /* use the old style of address negotiation */
+    go->neg_addr = 1;
+    go->old_addrs = 1;
+  }
+  if (wo->neg_vj && !go->neg_vj && !go->old_vj) {
+    /* try an older style of VJ negotiation */
+    if (cis_received[f->unit] == 0) {
+      /* keep trying the new style until we see some CI from the peer */
+      go->neg_vj = 1;
+    } else {
+      /* use the old style only if the peer did */
+      if (ho->neg_vj && ho->old_vj) {
+        go->neg_vj = 1;
+        go->old_vj = 1;
+        go->vj_protocol = ho->vj_protocol;
+      }
+    }
+  }
+
+  return (LENCIADDR(go->neg_addr, go->old_addrs) +
+          LENCIVJ(go->neg_vj, go->old_vj) +
+          LENCIDNS(go->req_dns1) +
+          LENCIDNS(go->req_dns2));
+}
+
+
+/*
+ * ipcp_addci - Add our desired CIs to a packet.
+ */
+static void
+ipcp_addci(fsm *f, u_char *ucp, int *lenp)
+{
+  ipcp_options *go = &ipcp_gotoptions[f->unit];
+  int len = *lenp;
+
+#define ADDCIVJ(opt, neg, val, old, maxslotindex, cflag) \
+  if (neg) { \
+    int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
+    if (len >= vjlen) { \
+      PUTCHAR(opt, ucp); \
+      PUTCHAR(vjlen, ucp); \
+      PUTSHORT(val, ucp); \
+      if (!old) { \
+        PUTCHAR(maxslotindex, ucp); \
+        PUTCHAR(cflag, ucp); \
+      } \
+      len -= vjlen; \
+    } else { \
+      neg = 0; \
+    } \
+  }
+
+#define ADDCIADDR(opt, neg, old, val1, val2) \
+  if (neg) { \
+    int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
+    if (len >= addrlen) { \
+      u32_t l; \
+      PUTCHAR(opt, ucp); \
+      PUTCHAR(addrlen, ucp); \
+      l = ntohl(val1); \
+      PUTLONG(l, ucp); \
+      if (old) { \
+        l = ntohl(val2); \
+        PUTLONG(l, ucp); \
+      } \
+      len -= addrlen; \
+    } else { \
+      neg = 0; \
+    } \
+  }
+
+#define ADDCIDNS(opt, neg, addr) \
+  if (neg) { \
+    if (len >= CILEN_ADDR) { \
+      u32_t l; \
+      PUTCHAR(opt, ucp); \
+      PUTCHAR(CILEN_ADDR, ucp); \
+      l = ntohl(addr); \
+      PUTLONG(l, ucp); \
+      len -= CILEN_ADDR; \
+    } else { \
+      neg = 0; \
+    } \
+  }
+
+  ADDCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
+      go->old_addrs, go->ouraddr, go->hisaddr);
+
+  ADDCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
+      go->maxslotindex, go->cflag);
+
+  ADDCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
+
+  ADDCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
+
+  *lenp -= len;
+}
+
+
+/*
+ * ipcp_ackci - Ack our CIs.
+ *
+ * Returns:
+ *  0 - Ack was bad.
+ *  1 - Ack was good.
+ */
+static int
+ipcp_ackci(fsm *f, u_char *p, int len)
+{
+  ipcp_options *go = &ipcp_gotoptions[f->unit];
+  u_short cilen, citype, cishort;
+  u32_t cilong;
+  u_char cimaxslotindex, cicflag;
+
+  /*
+   * CIs must be in exactly the same order that we sent...
+   * Check packet length and CI length at each step.
+   * If we find any deviations, then this packet is bad.
+   */
+
+#define ACKCIVJ(opt, neg, val, old, maxslotindex, cflag) \
+  if (neg) { \
+    int vjlen = old? CILEN_COMPRESS : CILEN_VJ; \
+    if ((len -= vjlen) < 0) { \
+      goto bad; \
+    } \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != vjlen || \
+        citype != opt) { \
+      goto bad; \
+    } \
+    GETSHORT(cishort, p); \
+    if (cishort != val) { \
+      goto bad; \
+    } \
+    if (!old) { \
+      GETCHAR(cimaxslotindex, p); \
+      if (cimaxslotindex != maxslotindex) { \
+        goto bad; \
+      } \
+      GETCHAR(cicflag, p); \
+      if (cicflag != cflag) { \
+        goto bad; \
+      } \
+    } \
+  }
+  
+#define ACKCIADDR(opt, neg, old, val1, val2) \
+  if (neg) { \
+    int addrlen = (old? CILEN_ADDRS: CILEN_ADDR); \
+    u32_t l; \
+    if ((len -= addrlen) < 0) { \
+      goto bad; \
+    } \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != addrlen || \
+        citype != opt) { \
+      goto bad; \
+    } \
+    GETLONG(l, p); \
+    cilong = htonl(l); \
+    if (val1 != cilong) { \
+      goto bad; \
+    } \
+    if (old) { \
+      GETLONG(l, p); \
+      cilong = htonl(l); \
+      if (val2 != cilong) { \
+        goto bad; \
+      } \
+    } \
+  }
+
+#define ACKCIDNS(opt, neg, addr) \
+  if (neg) { \
+    u32_t l; \
+    if ((len -= CILEN_ADDR) < 0) { \
+      goto bad; \
+    } \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != CILEN_ADDR || \
+        citype != opt) { \
+      goto bad; \
+    } \
+    GETLONG(l, p); \
+    cilong = htonl(l); \
+    if (addr != cilong) { \
+      goto bad; \
+    } \
+  }
+
+  ACKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), go->neg_addr,
+        go->old_addrs, go->ouraddr, go->hisaddr);
+
+  ACKCIVJ(CI_COMPRESSTYPE, go->neg_vj, go->vj_protocol, go->old_vj,
+      go->maxslotindex, go->cflag);
+
+  ACKCIDNS(CI_MS_DNS1, go->req_dns1, go->dnsaddr[0]);
+
+  ACKCIDNS(CI_MS_DNS2, go->req_dns2, go->dnsaddr[1]);
+
+  /*
+   * If there are any remaining CIs, then this packet is bad.
+   */
+  if (len != 0) {
+    goto bad;
+  }
+  return (1);
+  
+bad:
+  IPCPDEBUG((LOG_INFO, "ipcp_ackci: received bad Ack!\n"));
+  return (0);
+}
+
+/*
+ * ipcp_nakci - Peer has sent a NAK for some of our CIs.
+ * This should not modify any state if the Nak is bad
+ * or if IPCP is in the LS_OPENED state.
+ *
+ * Returns:
+ *  0 - Nak was bad.
+ *  1 - Nak was good.
+ */
+static int
+ipcp_nakci(fsm *f, u_char *p, int len)
+{
+  ipcp_options *go = &ipcp_gotoptions[f->unit];
+  u_char cimaxslotindex, cicflag;
+  u_char citype, cilen, *next;
+  u_short cishort;
+  u32_t ciaddr1, ciaddr2, l, cidnsaddr;
+  ipcp_options no;    /* options we've seen Naks for */
+  ipcp_options try;    /* options to request next time */
+
+  BZERO(&no, sizeof(no));
+  try = *go;
+
+  /*
+   * Any Nak'd CIs must be in exactly the same order that we sent.
+   * Check packet length and CI length at each step.
+   * If we find any deviations, then this packet is bad.
+   */
+#define NAKCIADDR(opt, neg, old, code) \
+  if (go->neg && \
+      len >= (cilen = (old? CILEN_ADDRS: CILEN_ADDR)) && \
+      p[1] == cilen && \
+      p[0] == opt) { \
+    len -= cilen; \
+    INCPTR(2, p); \
+    GETLONG(l, p); \
+    ciaddr1 = htonl(l); \
+    if (old) { \
+      GETLONG(l, p); \
+      ciaddr2 = htonl(l); \
+      no.old_addrs = 1; \
+    } else { \
+      ciaddr2 = 0; \
+    } \
+    no.neg = 1; \
+    code \
+  }
+
+#define NAKCIVJ(opt, neg, code) \
+  if (go->neg && \
+      ((cilen = p[1]) == CILEN_COMPRESS || cilen == CILEN_VJ) && \
+      len >= cilen && \
+      p[0] == opt) { \
+    len -= cilen; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    no.neg = 1; \
+    code \
+  }
+  
+#define NAKCIDNS(opt, neg, code) \
+  if (go->neg && \
+      ((cilen = p[1]) == CILEN_ADDR) && \
+      len >= cilen && \
+      p[0] == opt) { \
+    len -= cilen; \
+    INCPTR(2, p); \
+    GETLONG(l, p); \
+    cidnsaddr = htonl(l); \
+    no.neg = 1; \
+    code \
+  }
+
+  /*
+   * Accept the peer's idea of {our,his} address, if different
+   * from our idea, only if the accept_{local,remote} flag is set.
+   */
+  NAKCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr, go->old_addrs,
+    if (go->accept_local && ciaddr1) { /* Do we know our address? */
+      try.ouraddr = ciaddr1;
+      IPCPDEBUG((LOG_INFO, "local IP address %s\n",
+           inet_ntoa(ciaddr1)));
+    }
+    if (go->accept_remote && ciaddr2) { /* Does he know his? */
+      try.hisaddr = ciaddr2;
+      IPCPDEBUG((LOG_INFO, "remote IP address %s\n",
+           inet_ntoa(ciaddr2)));
+    }
+  );
+
+  /*
+   * Accept the peer's value of maxslotindex provided that it
+   * is less than what we asked for.  Turn off slot-ID compression
+   * if the peer wants.  Send old-style compress-type option if
+   * the peer wants.
+   */
+  NAKCIVJ(CI_COMPRESSTYPE, neg_vj,
+    if (cilen == CILEN_VJ) {
+      GETCHAR(cimaxslotindex, p);
+      GETCHAR(cicflag, p);
+      if (cishort == IPCP_VJ_COMP) {
+        try.old_vj = 0;
+        if (cimaxslotindex < go->maxslotindex) {
+          try.maxslotindex = cimaxslotindex;
+        }
+        if (!cicflag) {
+          try.cflag = 0;
+        }
+      } else {
+        try.neg_vj = 0;
+      }
+    } else {
+      if (cishort == IPCP_VJ_COMP || cishort == IPCP_VJ_COMP_OLD) {
+        try.old_vj = 1;
+        try.vj_protocol = cishort;
+      } else {
+        try.neg_vj = 0;
+      }
+    }
+  );
+
+  NAKCIDNS(CI_MS_DNS1, req_dns1,
+      try.dnsaddr[0] = cidnsaddr;
+        IPCPDEBUG((LOG_INFO, "primary DNS address %s\n", inet_ntoa(cidnsaddr)));
+      );
+
+  NAKCIDNS(CI_MS_DNS2, req_dns2,
+      try.dnsaddr[1] = cidnsaddr;
+        IPCPDEBUG((LOG_INFO, "secondary DNS address %s\n", inet_ntoa(cidnsaddr)));
+      );
+
+  /*
+  * There may be remaining CIs, if the peer is requesting negotiation
+  * on an option that we didn't include in our request packet.
+  * If they want to negotiate about IP addresses, we comply.
+  * If they want us to ask for compression, we refuse.
+  */
+  while (len > CILEN_VOID) {
+    GETCHAR(citype, p);
+    GETCHAR(cilen, p);
+    if( (len -= cilen) < 0 ) {
+      goto bad;
+    }
+    next = p + cilen - 2;
+
+    switch (citype) {
+      case CI_COMPRESSTYPE:
+        if (go->neg_vj || no.neg_vj ||
+            (cilen != CILEN_VJ && cilen != CILEN_COMPRESS)) {
+          goto bad;
+        }
+        no.neg_vj = 1;
+        break;
+      case CI_ADDRS:
+        if ((go->neg_addr && go->old_addrs) || no.old_addrs
+            || cilen != CILEN_ADDRS) {
+          goto bad;
+        }
+        try.neg_addr = 1;
+        try.old_addrs = 1;
+        GETLONG(l, p);
+        ciaddr1 = htonl(l);
+        if (ciaddr1 && go->accept_local) {
+          try.ouraddr = ciaddr1;
+        }
+        GETLONG(l, p);
+        ciaddr2 = htonl(l);
+        if (ciaddr2 && go->accept_remote) {
+          try.hisaddr = ciaddr2;
+        }
+        no.old_addrs = 1;
+        break;
+      case CI_ADDR:
+        if (go->neg_addr || no.neg_addr || cilen != CILEN_ADDR) {
+          goto bad;
+        }
+        try.old_addrs = 0;
+        GETLONG(l, p);
+        ciaddr1 = htonl(l);
+        if (ciaddr1 && go->accept_local) {
+          try.ouraddr = ciaddr1;
+        }
+        if (try.ouraddr != 0) {
+          try.neg_addr = 1;
+        }
+        no.neg_addr = 1;
+        break;
+    }
+    p = next;
+  }
+
+  /* If there is still anything left, this packet is bad. */
+  if (len != 0) {
+    goto bad;
+  }
+
+  /*
+   * OK, the Nak is good.  Now we can update state.
+   */
+  if (f->state != LS_OPENED) {
+    *go = try;
+  }
+
+  return 1;
+
+bad:
+  IPCPDEBUG((LOG_INFO, "ipcp_nakci: received bad Nak!\n"));
+  return 0;
+}
+
+
+/*
+ * ipcp_rejci - Reject some of our CIs.
+ */
+static int
+ipcp_rejci(fsm *f, u_char *p, int len)
+{
+  ipcp_options *go = &ipcp_gotoptions[f->unit];
+  u_char cimaxslotindex, ciflag, cilen;
+  u_short cishort;
+  u32_t cilong;
+  ipcp_options try;    /* options to request next time */
+
+  try = *go;
+  /*
+   * Any Rejected CIs must be in exactly the same order that we sent.
+   * Check packet length and CI length at each step.
+   * If we find any deviations, then this packet is bad.
+   */
+#define REJCIADDR(opt, neg, old, val1, val2) \
+  if (go->neg && \
+      len >= (cilen = old? CILEN_ADDRS: CILEN_ADDR) && \
+      p[1] == cilen && \
+      p[0] == opt) { \
+    u32_t l; \
+    len -= cilen; \
+    INCPTR(2, p); \
+    GETLONG(l, p); \
+    cilong = htonl(l); \
+    /* Check rejected value. */ \
+    if (cilong != val1) { \
+      goto bad; \
+    } \
+    if (old) { \
+      GETLONG(l, p); \
+      cilong = htonl(l); \
+      /* Check rejected value. */ \
+      if (cilong != val2) { \
+        goto bad; \
+      } \
+    } \
+    try.neg = 0; \
+  }
+
+#define REJCIVJ(opt, neg, val, old, maxslot, cflag) \
+  if (go->neg && \
+      p[1] == (old? CILEN_COMPRESS : CILEN_VJ) && \
+      len >= p[1] && \
+      p[0] == opt) { \
+    len -= p[1]; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    /* Check rejected value. */  \
+    if (cishort != val) { \
+      goto bad; \
+    } \
+    if (!old) { \
+      GETCHAR(cimaxslotindex, p); \
+      if (cimaxslotindex != maxslot) { \
+        goto bad; \
+      } \
+      GETCHAR(ciflag, p); \
+      if (ciflag != cflag) { \
+        goto bad; \
+      } \
+    } \
+    try.neg = 0; \
+  }
+
+#define REJCIDNS(opt, neg, dnsaddr) \
+  if (go->neg && \
+      ((cilen = p[1]) == CILEN_ADDR) && \
+      len >= cilen && \
+      p[0] == opt) { \
+    u32_t l; \
+    len -= cilen; \
+    INCPTR(2, p); \
+    GETLONG(l, p); \
+    cilong = htonl(l); \
+    /* Check rejected value. */ \
+    if (cilong != dnsaddr) { \
+      goto bad; \
+    } \
+    try.neg = 0; \
+  }
+
+  REJCIADDR((go->old_addrs? CI_ADDRS: CI_ADDR), neg_addr,
+        go->old_addrs, go->ouraddr, go->hisaddr);
+
+  REJCIVJ(CI_COMPRESSTYPE, neg_vj, go->vj_protocol, go->old_vj,
+      go->maxslotindex, go->cflag);
+
+  REJCIDNS(CI_MS_DNS1, req_dns1, go->dnsaddr[0]);
+
+  REJCIDNS(CI_MS_DNS2, req_dns2, go->dnsaddr[1]);
+
+  /*
+   * If there are any remaining CIs, then this packet is bad.
+   */
+  if (len != 0) {
+    goto bad;
+  }
+  /*
+   * Now we can update state.
+   */
+  if (f->state != LS_OPENED) {
+    *go = try;
+  }
+  return 1;
+
+bad:
+  IPCPDEBUG((LOG_INFO, "ipcp_rejci: received bad Reject!\n"));
+  return 0;
+}
+
+
+/*
+ * ipcp_reqci - Check the peer's requested CIs and send appropriate response.
+ *
+ * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
+ * appropriately.  If reject_if_disagree is non-zero, doesn't return
+ * CONFNAK; returns CONFREJ if it can't return CONFACK.
+ */
+static int
+ipcp_reqci(fsm *f, u_char *inp/* Requested CIs */,int *len/* Length of requested CIs */,int reject_if_disagree)
+{
+  ipcp_options *wo = &ipcp_wantoptions[f->unit];
+  ipcp_options *ho = &ipcp_hisoptions[f->unit];
+  ipcp_options *ao = &ipcp_allowoptions[f->unit];
+#ifdef OLD_CI_ADDRS
+  ipcp_options *go = &ipcp_gotoptions[f->unit];
+#endif
+  u_char *cip, *next;     /* Pointer to current and next CIs */
+  u_short cilen, citype;  /* Parsed len, type */
+  u_short cishort;        /* Parsed short value */
+  u32_t tl, ciaddr1;      /* Parsed address values */
+#ifdef OLD_CI_ADDRS
+  u32_t ciaddr2;          /* Parsed address values */
+#endif
+  int rc = CONFACK;       /* Final packet return code */
+  int orc;                /* Individual option return code */
+  u_char *p;              /* Pointer to next char to parse */
+  u_char *ucp = inp;      /* Pointer to current output char */
+  int l = *len;           /* Length left */
+  u_char maxslotindex, cflag;
+  int d;
+
+  cis_received[f->unit] = 1;
+
+  /*
+   * Reset all his options.
+   */
+  BZERO(ho, sizeof(*ho));
+
+  /*
+   * Process all his options.
+   */
+  next = inp;
+  while (l) {
+    orc = CONFACK;       /* Assume success */
+    cip = p = next;      /* Remember begining of CI */
+    if (l < 2 ||         /* Not enough data for CI header or */
+        p[1] < 2 ||      /*  CI length too small or */
+        p[1] > l) {      /*  CI length too big? */
+      IPCPDEBUG((LOG_INFO, "ipcp_reqci: bad CI length!\n"));
+      orc = CONFREJ;     /* Reject bad CI */
+      cilen = l;         /* Reject till end of packet */
+      l = 0;             /* Don't loop again */
+      goto endswitch;
+    }
+    GETCHAR(citype, p);  /* Parse CI type */
+    GETCHAR(cilen, p);   /* Parse CI length */
+    l -= cilen;          /* Adjust remaining length */
+    next += cilen;       /* Step to next CI */
+
+    switch (citype) {      /* Check CI type */
+#ifdef OLD_CI_ADDRS /* Need to save space... */
+      case CI_ADDRS:
+        IPCPDEBUG((LOG_INFO, "ipcp_reqci: received ADDRS\n"));
+        if (!ao->neg_addr ||
+            cilen != CILEN_ADDRS) {  /* Check CI length */
+          orc = CONFREJ;    /* Reject CI */
+          break;
+        }
+
+        /*
+         * If he has no address, or if we both have his address but
+         * disagree about it, then NAK it with our idea.
+         * In particular, if we don't know his address, but he does,
+         * then accept it.
+         */
+        GETLONG(tl, p);    /* Parse source address (his) */
+        ciaddr1 = htonl(tl);
+        IPCPDEBUG((LOG_INFO, "his addr %s\n", inet_ntoa(ciaddr1)));
+        if (ciaddr1 != wo->hisaddr
+            && (ciaddr1 == 0 || !wo->accept_remote)) {
+          orc = CONFNAK;
+          if (!reject_if_disagree) {
+            DECPTR(sizeof(u32_t), p);
+            tl = ntohl(wo->hisaddr);
+            PUTLONG(tl, p);
+          }
+        } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
+          /*
+           * If neither we nor he knows his address, reject the option.
+           */
+          orc = CONFREJ;
+          wo->req_addr = 0;  /* don't NAK with 0.0.0.0 later */
+          break;
+        }
+
+        /*
+         * If he doesn't know our address, or if we both have our address
+         * but disagree about it, then NAK it with our idea.
+         */
+        GETLONG(tl, p);    /* Parse desination address (ours) */
+        ciaddr2 = htonl(tl);
+        IPCPDEBUG((LOG_INFO, "our addr %s\n", inet_ntoa(ciaddr2)));
+        if (ciaddr2 != wo->ouraddr) {
+          if (ciaddr2 == 0 || !wo->accept_local) {
+            orc = CONFNAK;
+            if (!reject_if_disagree) {
+              DECPTR(sizeof(u32_t), p);
+              tl = ntohl(wo->ouraddr);
+              PUTLONG(tl, p);
+            }
+          } else {
+            go->ouraddr = ciaddr2;  /* accept peer's idea */
+          }
+        }
+
+        ho->neg_addr = 1;
+        ho->old_addrs = 1;
+        ho->hisaddr = ciaddr1;
+        ho->ouraddr = ciaddr2;
+        break;
+#endif
+
+      case CI_ADDR:
+        if (!ao->neg_addr) {
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Reject ADDR not allowed\n"));
+          orc = CONFREJ;        /* Reject CI */
+          break;
+        } else if (cilen != CILEN_ADDR) {  /* Check CI length */
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Reject ADDR bad len\n"));
+          orc = CONFREJ;        /* Reject CI */
+          break;
+        }
+
+        /*
+         * If he has no address, or if we both have his address but
+         * disagree about it, then NAK it with our idea.
+         * In particular, if we don't know his address, but he does,
+         * then accept it.
+         */
+        GETLONG(tl, p);  /* Parse source address (his) */
+        ciaddr1 = htonl(tl);
+        if (ciaddr1 != wo->hisaddr
+            && (ciaddr1 == 0 || !wo->accept_remote)) {
+          orc = CONFNAK;
+          if (!reject_if_disagree) {
+            DECPTR(sizeof(u32_t), p);
+            tl = ntohl(wo->hisaddr);
+            PUTLONG(tl, p);
+          }
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Nak ADDR %s\n", inet_ntoa(ciaddr1)));
+        } else if (ciaddr1 == 0 && wo->hisaddr == 0) {
+          /*
+           * Don't ACK an address of 0.0.0.0 - reject it instead.
+           */
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Reject ADDR %s\n", inet_ntoa(ciaddr1)));
+          orc = CONFREJ;
+          wo->req_addr = 0;  /* don't NAK with 0.0.0.0 later */
+          break;
+        }
+
+        ho->neg_addr = 1;
+        ho->hisaddr = ciaddr1;
+        IPCPDEBUG((LOG_INFO, "ipcp_reqci: ADDR %s\n", inet_ntoa(ciaddr1)));
+        break;
+
+      case CI_MS_DNS1:
+      case CI_MS_DNS2:
+        /* Microsoft primary or secondary DNS request */
+        d = citype == CI_MS_DNS2;
+
+        /* If we do not have a DNS address then we cannot send it */
+        if (ao->dnsaddr[d] == 0 ||
+            cilen != CILEN_ADDR) {  /* Check CI length */
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting DNS%d Request\n", d+1));
+          orc = CONFREJ;        /* Reject CI */
+          break;
+        }
+        GETLONG(tl, p);
+        if (htonl(tl) != ao->dnsaddr[d]) {
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Naking DNS%d Request %d\n",
+                d+1, inet_ntoa(tl)));
+          DECPTR(sizeof(u32_t), p);
+          tl = ntohl(ao->dnsaddr[d]);
+          PUTLONG(tl, p);
+          orc = CONFNAK;
+        }
+        IPCPDEBUG((LOG_INFO, "ipcp_reqci: received DNS%d Request\n", d+1));
+        break;
+
+      case CI_MS_WINS1:
+      case CI_MS_WINS2:
+        /* Microsoft primary or secondary WINS request */
+        d = citype == CI_MS_WINS2;
+        IPCPDEBUG((LOG_INFO, "ipcp_reqci: received WINS%d Request\n", d+1));
+
+        /* If we do not have a DNS address then we cannot send it */
+        if (ao->winsaddr[d] == 0 ||
+          cilen != CILEN_ADDR) {  /* Check CI length */
+          orc = CONFREJ;      /* Reject CI */
+          break;
+        }
+        GETLONG(tl, p);
+        if (htonl(tl) != ao->winsaddr[d]) {
+          DECPTR(sizeof(u32_t), p);
+          tl = ntohl(ao->winsaddr[d]);
+          PUTLONG(tl, p);
+          orc = CONFNAK;
+        }
+        break;
+
+      case CI_COMPRESSTYPE:
+        if (!ao->neg_vj) {
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting COMPRESSTYPE not allowed\n"));
+          orc = CONFREJ;
+          break;
+        } else if (cilen != CILEN_VJ && cilen != CILEN_COMPRESS) {
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting COMPRESSTYPE len=%d\n", cilen));
+          orc = CONFREJ;
+          break;
+        }
+        GETSHORT(cishort, p);
+
+        if (!(cishort == IPCP_VJ_COMP ||
+            (cishort == IPCP_VJ_COMP_OLD && cilen == CILEN_COMPRESS))) {
+          IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting COMPRESSTYPE %d\n", cishort));
+          orc = CONFREJ;
+          break;
+        }
+
+        ho->neg_vj = 1;
+        ho->vj_protocol = cishort;
+        if (cilen == CILEN_VJ) {
+          GETCHAR(maxslotindex, p);
+          if (maxslotindex > ao->maxslotindex) { 
+            IPCPDEBUG((LOG_INFO, "ipcp_reqci: Naking VJ max slot %d\n", maxslotindex));
+            orc = CONFNAK;
+            if (!reject_if_disagree) {
+              DECPTR(1, p);
+              PUTCHAR(ao->maxslotindex, p);
+            }
+          }
+          GETCHAR(cflag, p);
+          if (cflag && !ao->cflag) {
+            IPCPDEBUG((LOG_INFO, "ipcp_reqci: Naking VJ cflag %d\n", cflag));
+            orc = CONFNAK;
+            if (!reject_if_disagree) {
+              DECPTR(1, p);
+              PUTCHAR(wo->cflag, p);
+            }
+          }
+          ho->maxslotindex = maxslotindex;
+          ho->cflag = cflag;
+        } else {
+          ho->old_vj = 1;
+          ho->maxslotindex = MAX_SLOTS - 1;
+          ho->cflag = 1;
+        }
+        IPCPDEBUG((LOG_INFO, 
+              "ipcp_reqci: received COMPRESSTYPE p=%d old=%d maxslot=%d cflag=%d\n",
+              ho->vj_protocol, ho->old_vj, ho->maxslotindex, ho->cflag));
+        break;
+
+      default:
+        IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting unknown CI type %d\n", citype));
+        orc = CONFREJ;
+        break;
+    }
+
+endswitch:
+    if (orc == CONFACK &&    /* Good CI */
+        rc != CONFACK) {     /*  but prior CI wasnt? */
+      continue;              /* Don't send this one */
+    }
+
+    if (orc == CONFNAK) {    /* Nak this CI? */
+      if (reject_if_disagree) {  /* Getting fed up with sending NAKs? */
+        IPCPDEBUG((LOG_INFO, "ipcp_reqci: Rejecting too many naks\n"));
+        orc = CONFREJ;       /* Get tough if so */
+      } else {
+        if (rc == CONFREJ) { /* Rejecting prior CI? */
+          continue;          /* Don't send this one */
+        }
+        if (rc == CONFACK) { /* Ack'd all prior CIs? */
+          rc = CONFNAK;      /* Not anymore... */
+          ucp = inp;         /* Backup */
+        }
+      }
+    }
+
+    if (orc == CONFREJ &&    /* Reject this CI */
+        rc != CONFREJ) {  /*  but no prior ones? */
+      rc = CONFREJ;
+      ucp = inp;        /* Backup */
+    }
+    
+    /* Need to move CI? */
+    if (ucp != cip) {
+      BCOPY(cip, ucp, cilen);  /* Move it */
+    }
+
+    /* Update output pointer */
+    INCPTR(cilen, ucp);
+  }
+
+  /*
+   * If we aren't rejecting this packet, and we want to negotiate
+   * their address, and they didn't send their address, then we
+   * send a NAK with a CI_ADDR option appended.  We assume the
+   * input buffer is long enough that we can append the extra
+   * option safely.
+   */
+  if (rc != CONFREJ && !ho->neg_addr &&
+      wo->req_addr && !reject_if_disagree) {
+    IPCPDEBUG((LOG_INFO, "ipcp_reqci: Requesting peer address\n"));
+    if (rc == CONFACK) {
+      rc = CONFNAK;
+      ucp = inp;        /* reset pointer */
+      wo->req_addr = 0;    /* don't ask again */
+    }
+    PUTCHAR(CI_ADDR, ucp);
+    PUTCHAR(CILEN_ADDR, ucp);
+    tl = ntohl(wo->hisaddr);
+    PUTLONG(tl, ucp);
+  }
+
+  *len = (int)(ucp - inp);    /* Compute output length */
+  IPCPDEBUG((LOG_INFO, "ipcp_reqci: returning Configure-%s\n", CODENAME(rc)));
+  return (rc);      /* Return final code */
+}
+
+
+#if 0
+/*
+ * ip_check_options - check that any IP-related options are OK,
+ * and assign appropriate defaults.
+ */
+static void
+ip_check_options(u_long localAddr)
+{
+  ipcp_options *wo = &ipcp_wantoptions[0];
+
+  /*
+   * Load our default IP address but allow the remote host to give us
+   * a new address.
+   */
+  if (wo->ouraddr == 0 && !ppp_settings.disable_defaultip) {
+    wo->accept_local = 1;  /* don't insist on this default value */
+    wo->ouraddr = htonl(localAddr);
+  }
+}
+#endif
+
+
+/*
+ * ipcp_up - IPCP has come UP.
+ *
+ * Configure the IP network interface appropriately and bring it up.
+ */
+static void
+ipcp_up(fsm *f)
+{
+  u32_t mask;
+  ipcp_options *ho = &ipcp_hisoptions[f->unit];
+  ipcp_options *go = &ipcp_gotoptions[f->unit];
+  ipcp_options *wo = &ipcp_wantoptions[f->unit];
+
+  np_up(f->unit, PPP_IP);
+  IPCPDEBUG((LOG_INFO, "ipcp: up\n"));
+
+  /*
+   * We must have a non-zero IP address for both ends of the link.
+   */
+  if (!ho->neg_addr) {
+    ho->hisaddr = wo->hisaddr;
+  }
+
+  if (ho->hisaddr == 0) {
+    IPCPDEBUG((LOG_ERR, "Could not determine remote IP address\n"));
+    ipcp_close(f->unit, "Could not determine remote IP address");
+    return;
+  }
+  if (go->ouraddr == 0) {
+    IPCPDEBUG((LOG_ERR, "Could not determine local IP address\n"));
+    ipcp_close(f->unit, "Could not determine local IP address");
+    return;
+  }
+
+  if (ppp_settings.usepeerdns && (go->dnsaddr[0] || go->dnsaddr[1])) {
+    /*pppGotDNSAddrs(go->dnsaddr[0], go->dnsaddr[1]);*/
+  }
+
+  /*
+   * Check that the peer is allowed to use the IP address it wants.
+   */
+  if (!auth_ip_addr(f->unit, ho->hisaddr)) {
+    IPCPDEBUG((LOG_ERR, "Peer is not authorized to use remote address %s\n",
+        inet_ntoa(ho->hisaddr)));
+    ipcp_close(f->unit, "Unauthorized remote IP address");
+    return;
+  }
+
+  /* set tcp compression */
+  sifvjcomp(f->unit, ho->neg_vj, ho->cflag, ho->maxslotindex);
+
+  /*
+   * Set IP addresses and (if specified) netmask.
+   */
+  mask = GetMask(go->ouraddr);
+
+  if (!sifaddr(f->unit, go->ouraddr, ho->hisaddr, mask, go->dnsaddr[0], go->dnsaddr[1])) {
+    IPCPDEBUG((LOG_WARNING, "sifaddr failed\n"));
+    ipcp_close(f->unit, "Interface configuration failed");
+    return;
+  }
+
+  /* bring the interface up for IP */
+  if (!sifup(f->unit)) {
+    IPCPDEBUG((LOG_WARNING, "sifup failed\n"));
+    ipcp_close(f->unit, "Interface configuration failed");
+    return;
+  }
+
+  sifnpmode(f->unit, PPP_IP, NPMODE_PASS);
+
+  /* assign a default route through the interface if required */
+  if (ipcp_wantoptions[f->unit].default_route) {
+    if (sifdefaultroute(f->unit, go->ouraddr, ho->hisaddr)) {
+      default_route_set[f->unit] = 1;
+    }
+  }
+
+  IPCPDEBUG((LOG_NOTICE, "local  IP address %s\n", inet_ntoa(go->ouraddr)));
+  IPCPDEBUG((LOG_NOTICE, "remote IP address %s\n", inet_ntoa(ho->hisaddr)));
+  if (go->dnsaddr[0]) {
+    IPCPDEBUG((LOG_NOTICE, "primary   DNS address %s\n", inet_ntoa(go->dnsaddr[0])));
+  }
+  if (go->dnsaddr[1]) {
+    IPCPDEBUG((LOG_NOTICE, "secondary DNS address %s\n", inet_ntoa(go->dnsaddr[1])));
+  }
+}
+
+
+/*
+ * ipcp_down - IPCP has gone DOWN.
+ *
+ * Take the IP network interface down, clear its addresses
+ * and delete routes through it.
+ */
+static void
+ipcp_down(fsm *f)
+{
+  IPCPDEBUG((LOG_INFO, "ipcp: down\n"));
+  np_down(f->unit, PPP_IP);
+  sifvjcomp(f->unit, 0, 0, 0);
+
+  sifdown(f->unit);
+  ipcp_clear_addrs(f->unit);
+}
+
+
+/*
+ * ipcp_clear_addrs() - clear the interface addresses, routes, etc.
+ */
+static void
+ipcp_clear_addrs(int unit)
+{
+  u32_t ouraddr, hisaddr;
+
+  ouraddr = ipcp_gotoptions[unit].ouraddr;
+  hisaddr = ipcp_hisoptions[unit].hisaddr;
+  if (default_route_set[unit]) {
+    cifdefaultroute(unit, ouraddr, hisaddr);
+    default_route_set[unit] = 0;
+  }
+  cifaddr(unit, ouraddr, hisaddr);
+}
+
+
+/*
+ * ipcp_finished - possibly shut down the lower layers.
+ */
+static void
+ipcp_finished(fsm *f)
+{
+  np_finished(f->unit, PPP_IP);
+}
+
+#if 0
+static int
+ipcp_printpkt(u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
+{
+  LWIP_UNUSED_ARG(p);
+  LWIP_UNUSED_ARG(plen);
+  LWIP_UNUSED_ARG(printer);
+  LWIP_UNUSED_ARG(arg);
+  return 0;
+}
+
+/*
+ * ip_active_pkt - see if this IP packet is worth bringing the link up for.
+ * We don't bring the link up for IP fragments or for TCP FIN packets
+ * with no data.
+ */
+#define IP_HDRLEN   20  /* bytes */
+#define IP_OFFMASK  0x1fff
+#define IPPROTO_TCP 6
+#define TCP_HDRLEN  20
+#define TH_FIN      0x01
+
+/*
+ * We use these macros because the IP header may be at an odd address,
+ * and some compilers might use word loads to get th_off or ip_hl.
+ */
+
+#define net_short(x)    (((x)[0] << 8) + (x)[1])
+#define get_iphl(x)     (((unsigned char *)(x))[0] & 0xF)
+#define get_ipoff(x)    net_short((unsigned char *)(x) + 6)
+#define get_ipproto(x)  (((unsigned char *)(x))[9])
+#define get_tcpoff(x)   (((unsigned char *)(x))[12] >> 4)
+#define get_tcpflags(x) (((unsigned char *)(x))[13])
+
+static int
+ip_active_pkt(u_char *pkt, int len)
+{
+  u_char *tcp;
+  int hlen;
+
+  len -= PPP_HDRLEN;
+  pkt += PPP_HDRLEN;
+  if (len < IP_HDRLEN) {
+    return 0;
+  }
+  if ((get_ipoff(pkt) & IP_OFFMASK) != 0) {
+    return 0;
+  }
+  if (get_ipproto(pkt) != IPPROTO_TCP) {
+    return 1;
+  }
+  hlen = get_iphl(pkt) * 4;
+  if (len < hlen + TCP_HDRLEN) {
+    return 0;
+  }
+  tcp = pkt + hlen;
+  if ((get_tcpflags(tcp) & TH_FIN) != 0 && len == hlen + get_tcpoff(tcp) * 4) {
+    return 0;
+  }
+  return 1;
+}
+#endif
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ipcp.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ipcp.h
new file mode 100644
index 000000000..dfcf4fba6
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ipcp.h
@@ -0,0 +1,124 @@
+/*****************************************************************************
+* ipcp.h -  PPP IP NCP: Internet Protocol Network Control Protocol header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-04 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
+*   Original derived from BSD codes.
+*****************************************************************************/
+/*
+ * ipcp.h - IP Control Protocol definitions.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: ipcp.h,v 1.3 2007/12/19 20:47:23 fbernon Exp $
+ */
+
+#ifndef IPCP_H
+#define IPCP_H
+
+/*************************
+*** PUBLIC DEFINITIONS ***
+*************************/
+/*
+ * Options.
+ */
+#define CI_ADDRS            1      /* IP Addresses */
+#define CI_COMPRESSTYPE     2      /* Compression Type */
+#define CI_ADDR             3
+
+#define CI_MS_WINS1         128    /* Primary WINS value */
+#define CI_MS_DNS1          129    /* Primary DNS value */
+#define CI_MS_WINS2         130    /* Secondary WINS value */
+#define CI_MS_DNS2          131    /* Secondary DNS value */
+
+#define IPCP_VJMODE_OLD     1      /* "old" mode (option # = 0x0037) */
+#define IPCP_VJMODE_RFC1172 2      /* "old-rfc"mode (option # = 0x002d) */
+#define IPCP_VJMODE_RFC1332 3      /* "new-rfc"mode (option # = 0x002d, */
+                                   /*  maxslot and slot number compression) */
+
+#define IPCP_VJ_COMP        0x002d /* current value for VJ compression option */
+#define IPCP_VJ_COMP_OLD    0x0037 /* "old" (i.e, broken) value for VJ */
+                                   /* compression option */ 
+
+
+/************************
+*** PUBLIC DATA TYPES ***
+************************/
+
+typedef struct ipcp_options {
+  u_int   neg_addr      : 1; /* Negotiate IP Address? */
+  u_int   old_addrs     : 1; /* Use old (IP-Addresses) option? */
+  u_int   req_addr      : 1; /* Ask peer to send IP address? */
+  u_int   default_route : 1; /* Assign default route through interface? */
+  u_int   proxy_arp     : 1; /* Make proxy ARP entry for peer? */
+  u_int   neg_vj        : 1; /* Van Jacobson Compression? */
+  u_int   old_vj        : 1; /* use old (short) form of VJ option? */
+  u_int   accept_local  : 1; /* accept peer's value for ouraddr */
+  u_int   accept_remote : 1; /* accept peer's value for hisaddr */
+  u_int   req_dns1      : 1; /* Ask peer to send primary DNS address? */
+  u_int   req_dns2      : 1; /* Ask peer to send secondary DNS address? */
+  u_short vj_protocol;       /* protocol value to use in VJ option */
+  u_char  maxslotindex;      /* VJ slots - 1. */
+  u_char  cflag;             /* VJ slot compression flag. */
+  u32_t   ouraddr, hisaddr;  /* Addresses in NETWORK BYTE ORDER */
+  u32_t   dnsaddr[2];        /* Primary and secondary MS DNS entries */
+  u32_t   winsaddr[2];       /* Primary and secondary MS WINS entries */
+} ipcp_options;
+
+
+/*****************************
+*** PUBLIC DATA STRUCTURES ***
+*****************************/
+
+extern fsm ipcp_fsm[];
+extern ipcp_options ipcp_wantoptions[];
+extern ipcp_options ipcp_gotoptions[];
+extern ipcp_options ipcp_allowoptions[];
+extern ipcp_options ipcp_hisoptions[];
+
+extern struct protent ipcp_protent;
+
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+
+#endif /* IPCP_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/lcp.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/lcp.c
new file mode 100644
index 000000000..85a0add95
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/lcp.c
@@ -0,0 +1,2035 @@
+/*****************************************************************************
+* lcp.c - Network Link Control Protocol program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-01 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original.
+*****************************************************************************/
+
+/*
+ * lcp.c - PPP Link Control Protocol.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+ 
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "fsm.h"
+#include "chap.h"
+#include "magic.h"
+#include "auth.h"
+#include "lcp.h"
+
+#include <string.h>
+
+#if PPPOE_SUPPORT
+#include "netif/ppp_oe.h"
+#else
+#define PPPOE_MAXMTU PPP_MAXMRU
+#endif
+
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+/*
+ * Length of each type of configuration option (in octets)
+ */
+#define CILEN_VOID  2
+#define CILEN_CHAR  3
+#define CILEN_SHORT 4 /* CILEN_VOID + sizeof(short) */
+#define CILEN_CHAP  5 /* CILEN_VOID + sizeof(short) + 1 */
+#define CILEN_LONG  6 /* CILEN_VOID + sizeof(long) */
+#define CILEN_LQR   8 /* CILEN_VOID + sizeof(short) + sizeof(long) */
+#define CILEN_CBCP  3
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+/*
+ * Callbacks for fsm code.  (CI = Configuration Information)
+ */
+static void lcp_resetci (fsm*);                   /* Reset our CI */
+static int  lcp_cilen (fsm*);                     /* Return length of our CI */
+static void lcp_addci (fsm*, u_char*, int*);      /* Add our CI to pkt */
+static int  lcp_ackci (fsm*, u_char*, int);       /* Peer ack'd our CI */
+static int  lcp_nakci (fsm*, u_char*, int);       /* Peer nak'd our CI */
+static int  lcp_rejci (fsm*, u_char*, int);       /* Peer rej'd our CI */
+static int  lcp_reqci (fsm*, u_char*, int*, int); /* Rcv peer CI */
+static void lcp_up (fsm*);                        /* We're UP */
+static void lcp_down (fsm*);                      /* We're DOWN */
+static void lcp_starting (fsm*);                  /* We need lower layer up */
+static void lcp_finished (fsm*);                  /* We need lower layer down */
+static int  lcp_extcode (fsm*, int, u_char, u_char*, int);
+
+static void lcp_rprotrej (fsm*, u_char*, int);
+
+/*
+ * routines to send LCP echos to peer
+ */
+static void lcp_echo_lowerup (int);
+static void lcp_echo_lowerdown (int);
+static void LcpEchoTimeout (void*);
+static void lcp_received_echo_reply (fsm*, int, u_char*, int);
+static void LcpSendEchoRequest (fsm*);
+static void LcpLinkFailure (fsm*);
+static void LcpEchoCheck (fsm*);
+
+/*
+ * Protocol entry points.
+ * Some of these are called directly.
+ */
+static void lcp_input (int, u_char *, int);
+static void lcp_protrej (int);
+
+#define CODENAME(x) ((x) == CONFACK ? "ACK" : (x) == CONFNAK ? "NAK" : "REJ")
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+/* global vars */
+LinkPhase lcp_phase[NUM_PPP];          /* Phase of link session (RFC 1661) */
+lcp_options lcp_wantoptions[NUM_PPP];  /* Options that we want to request */
+lcp_options lcp_gotoptions[NUM_PPP];   /* Options that peer ack'd */
+lcp_options lcp_allowoptions[NUM_PPP]; /* Options we allow peer to request */
+lcp_options lcp_hisoptions[NUM_PPP];   /* Options that we ack'd */
+ext_accm xmit_accm[NUM_PPP];           /* extended transmit ACCM */
+
+
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+static fsm lcp_fsm[NUM_PPP];                            /* LCP fsm structure (global)*/
+static u_int lcp_echo_interval      = LCP_ECHOINTERVAL; /* Interval between LCP echo-requests */
+static u_int lcp_echo_fails         = LCP_MAXECHOFAILS; /* Tolerance to unanswered echo-requests */
+static u32_t lcp_echos_pending      = 0;                /* Number of outstanding echo msgs */
+static u32_t lcp_echo_number        = 0;                /* ID number of next echo frame */
+static u32_t lcp_echo_timer_running = 0;                /* TRUE if a timer is running */
+
+static u_char nak_buffer[PPP_MRU]; /* where we construct a nak packet */
+
+static fsm_callbacks lcp_callbacks = { /* LCP callback routines */
+  lcp_resetci,  /* Reset our Configuration Information */
+  lcp_cilen,    /* Length of our Configuration Information */
+  lcp_addci,    /* Add our Configuration Information */
+  lcp_ackci,    /* ACK our Configuration Information */
+  lcp_nakci,    /* NAK our Configuration Information */
+  lcp_rejci,    /* Reject our Configuration Information */
+  lcp_reqci,    /* Request peer's Configuration Information */
+  lcp_up,       /* Called when fsm reaches LS_OPENED state */
+  lcp_down,     /* Called when fsm leaves LS_OPENED state */
+  lcp_starting, /* Called when we want the lower layer up */
+  lcp_finished, /* Called when we want the lower layer down */
+  NULL,         /* Called when Protocol-Reject received */
+  NULL,         /* Retransmission is necessary */
+  lcp_extcode,  /* Called to handle LCP-specific codes */
+  "LCP"         /* String name of protocol */
+};
+
+struct protent lcp_protent = {
+    PPP_LCP,
+    lcp_init,
+    lcp_input,
+    lcp_protrej,
+    lcp_lowerup,
+    lcp_lowerdown,
+    lcp_open,
+    lcp_close,
+#if 0
+    lcp_printpkt,
+    NULL,
+#endif
+    1,
+    "LCP",
+#if 0
+    NULL,
+    NULL,
+    NULL
+#endif
+};
+
+int lcp_loopbackfail = DEFLOOPBACKFAIL;
+
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ * lcp_init - Initialize LCP.
+ */
+void
+lcp_init(int unit)
+{
+  fsm         *f  = &lcp_fsm[unit];
+  lcp_options *wo = &lcp_wantoptions[unit];
+  lcp_options *ao = &lcp_allowoptions[unit];
+  
+  f->unit      = unit;
+  f->protocol  = PPP_LCP;
+  f->callbacks = &lcp_callbacks;
+  
+  fsm_init(f);
+  
+  wo->passive           = 0;
+  wo->silent            = 0;
+  wo->restart           = 0;               /* Set to 1 in kernels or multi-line implementations */
+  wo->neg_mru           = 1;
+  wo->mru               = PPP_DEFMRU;
+  wo->neg_asyncmap      = 1;
+  wo->asyncmap          = 0x00000000l;     /* Assume don't need to escape any ctl chars. */
+  wo->neg_chap          = 0;               /* Set to 1 on server */
+  wo->neg_upap          = 0;               /* Set to 1 on server */
+  wo->chap_mdtype       = CHAP_DIGEST_MD5;
+  wo->neg_magicnumber   = 1;
+  wo->neg_pcompression  = 1;
+  wo->neg_accompression = 1;
+  wo->neg_lqr           = 0;               /* no LQR implementation yet */
+  wo->neg_cbcp          = 0;
+  
+  ao->neg_mru           = 1;
+  ao->mru               = PPP_MAXMRU;
+  ao->neg_asyncmap      = 1;
+  ao->asyncmap          = 0x00000000l;     /* Assume don't need to escape any ctl chars. */
+  ao->neg_chap          = (CHAP_SUPPORT != 0);
+  ao->chap_mdtype       = CHAP_DIGEST_MD5;
+  ao->neg_upap          = (PAP_SUPPORT != 0);
+  ao->neg_magicnumber   = 1;
+  ao->neg_pcompression  = 1;
+  ao->neg_accompression = 1;
+  ao->neg_lqr           = 0;               /* no LQR implementation yet */
+  ao->neg_cbcp          = (CBCP_SUPPORT != 0);
+
+  /* 
+   * Set transmit escape for the flag and escape characters plus anything
+   * set for the allowable options.
+   */
+  memset(xmit_accm[unit], 0, sizeof(xmit_accm[0]));
+  xmit_accm[unit][15] = 0x60;
+  xmit_accm[unit][0]  = (u_char)((ao->asyncmap        & 0xFF));
+  xmit_accm[unit][1]  = (u_char)((ao->asyncmap >> 8)  & 0xFF);
+  xmit_accm[unit][2]  = (u_char)((ao->asyncmap >> 16) & 0xFF);
+  xmit_accm[unit][3]  = (u_char)((ao->asyncmap >> 24) & 0xFF);
+  LCPDEBUG((LOG_INFO, "lcp_init: xmit_accm=%X %X %X %X\n",
+        xmit_accm[unit][0],
+        xmit_accm[unit][1],
+        xmit_accm[unit][2],
+        xmit_accm[unit][3]));
+  
+  lcp_phase[unit] = PHASE_INITIALIZE;
+}
+
+
+/*
+ * lcp_open - LCP is allowed to come up.
+ */
+void
+lcp_open(int unit)
+{
+  fsm         *f  = &lcp_fsm[unit];
+  lcp_options *wo = &lcp_wantoptions[unit];
+
+  f->flags = 0;
+  if (wo->passive) {
+    f->flags |= OPT_PASSIVE;
+  }
+  if (wo->silent) {
+    f->flags |= OPT_SILENT;
+  }
+  fsm_open(f);
+
+  lcp_phase[unit] = PHASE_ESTABLISH;
+}
+
+
+/*
+ * lcp_close - Take LCP down.
+ */
+void
+lcp_close(int unit, char *reason)
+{
+  fsm *f = &lcp_fsm[unit];
+
+  if (lcp_phase[unit] != PHASE_DEAD) {
+    lcp_phase[unit] = PHASE_TERMINATE;
+  }
+  if (f->state == LS_STOPPED && f->flags & (OPT_PASSIVE|OPT_SILENT)) {
+    /*
+     * This action is not strictly according to the FSM in RFC1548,
+     * but it does mean that the program terminates if you do an
+     * lcp_close() in passive/silent mode when a connection hasn't
+     * been established.
+     */
+    f->state = LS_CLOSED;
+    lcp_finished(f);
+  } else {
+    fsm_close(&lcp_fsm[unit], reason);
+  }
+}
+
+
+/*
+ * lcp_lowerup - The lower layer is up.
+ */
+void
+lcp_lowerup(int unit)
+{
+  lcp_options *wo = &lcp_wantoptions[unit];
+
+  /*
+   * Don't use A/C or protocol compression on transmission,
+   * but accept A/C and protocol compressed packets
+   * if we are going to ask for A/C and protocol compression.
+   */
+  ppp_set_xaccm(unit, &xmit_accm[unit]);
+  ppp_send_config(unit, PPP_MRU, 0xffffffffl, 0, 0);
+  ppp_recv_config(unit, PPP_MRU, 0x00000000l,
+  wo->neg_pcompression, wo->neg_accompression);
+  peer_mru[unit] = PPP_MRU;
+  lcp_allowoptions[unit].asyncmap = (u_long)xmit_accm[unit][0]
+                                 | ((u_long)xmit_accm[unit][1] << 8)
+                                 | ((u_long)xmit_accm[unit][2] << 16)
+                                 | ((u_long)xmit_accm[unit][3] << 24);
+  LCPDEBUG((LOG_INFO, "lcp_lowerup: asyncmap=%X %X %X %X\n",
+            xmit_accm[unit][3],
+            xmit_accm[unit][2],
+            xmit_accm[unit][1],
+            xmit_accm[unit][0]));
+
+  fsm_lowerup(&lcp_fsm[unit]);
+}
+
+
+/*
+ * lcp_lowerdown - The lower layer is down.
+ */
+void
+lcp_lowerdown(int unit)
+{
+  fsm_lowerdown(&lcp_fsm[unit]);
+}
+
+/*
+ * lcp_sprotrej - Send a Protocol-Reject for some protocol.
+ */
+void
+lcp_sprotrej(int unit, u_char *p, int len)
+{
+  /*
+   * Send back the protocol and the information field of the
+   * rejected packet.  We only get here if LCP is in the LS_OPENED state.
+   */
+
+  fsm_sdata(&lcp_fsm[unit], PROTREJ, ++lcp_fsm[unit].id, p, len);
+}
+
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+/*
+ * lcp_input - Input LCP packet.
+ */
+static void
+lcp_input(int unit, u_char *p, int len)
+{
+  fsm *f = &lcp_fsm[unit];
+
+  fsm_input(f, p, len);
+}
+
+
+/*
+ * lcp_extcode - Handle a LCP-specific code.
+ */
+static int
+lcp_extcode(fsm *f, int code, u_char id, u_char *inp, int len)
+{
+  u_char *magp;
+
+  switch( code ){
+    case PROTREJ:
+      lcp_rprotrej(f, inp, len);
+      break;
+  
+    case ECHOREQ:
+      if (f->state != LS_OPENED) {
+        break;
+      }
+      LCPDEBUG((LOG_INFO, "lcp: Echo-Request, Rcvd id %d\n", id));
+      magp = inp;
+      PUTLONG(lcp_gotoptions[f->unit].magicnumber, magp);
+      fsm_sdata(f, ECHOREP, id, inp, len);
+      break;
+
+    case ECHOREP:
+      lcp_received_echo_reply(f, id, inp, len);
+      break;
+    
+    case DISCREQ:
+      break;
+    
+    default:
+      return 0;
+  }
+  return 1;
+}
+
+
+/*
+ * lcp_rprotrej - Receive an Protocol-Reject.
+ *
+ * Figure out which protocol is rejected and inform it.
+ */
+static void
+lcp_rprotrej(fsm *f, u_char *inp, int len)
+{
+  int i;
+  struct protent *protp;
+  u_short prot;
+
+  if (len < sizeof (u_short)) {
+    LCPDEBUG((LOG_INFO, "lcp_rprotrej: Rcvd short Protocol-Reject packet!\n"));
+    return;
+  }
+
+  GETSHORT(prot, inp);
+
+  LCPDEBUG((LOG_INFO, "lcp_rprotrej: Rcvd Protocol-Reject packet for %x!\n", prot));
+
+  /*
+   * Protocol-Reject packets received in any state other than the LCP
+   * LS_OPENED state SHOULD be silently discarded.
+   */
+  if( f->state != LS_OPENED ) {
+    LCPDEBUG((LOG_INFO, "Protocol-Reject discarded: LCP in state %d\n", f->state));
+    return;
+  }
+
+  /*
+   * Upcall the proper Protocol-Reject routine.
+   */
+  for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+    if (protp->protocol == prot && protp->enabled_flag) {
+      (*protp->protrej)(f->unit);
+      return;
+    }
+  }
+
+  LCPDEBUG((LOG_WARNING, "Protocol-Reject for unsupported protocol 0x%x\n", prot));
+}
+
+
+/*
+ * lcp_protrej - A Protocol-Reject was received.
+ */
+static void
+lcp_protrej(int unit)
+{
+  LWIP_UNUSED_ARG(unit);
+  /*
+   * Can't reject LCP!
+   */
+  LCPDEBUG((LOG_WARNING, "lcp_protrej: Received Protocol-Reject for LCP!\n"));
+  fsm_protreject(&lcp_fsm[unit]);
+}
+
+
+/*
+ * lcp_resetci - Reset our CI.
+ */
+static void
+lcp_resetci(fsm *f)
+{
+  lcp_wantoptions[f->unit].magicnumber = magic();
+  lcp_wantoptions[f->unit].numloops = 0;
+  lcp_gotoptions[f->unit] = lcp_wantoptions[f->unit];
+  peer_mru[f->unit] = PPP_MRU;
+  auth_reset(f->unit);
+}
+
+
+/*
+ * lcp_cilen - Return length of our CI.
+ */
+static int lcp_cilen(fsm *f)
+{
+  lcp_options *go = &lcp_gotoptions[f->unit];
+
+#define LENCIVOID(neg)  ((neg) ? CILEN_VOID : 0)
+#define LENCICHAP(neg)  ((neg) ? CILEN_CHAP : 0)
+#define LENCISHORT(neg) ((neg) ? CILEN_SHORT : 0)
+#define LENCILONG(neg)  ((neg) ? CILEN_LONG : 0)
+#define LENCILQR(neg)   ((neg) ? CILEN_LQR: 0)
+#define LENCICBCP(neg)  ((neg) ? CILEN_CBCP: 0)
+  /*
+   * NB: we only ask for one of CHAP and UPAP, even if we will
+   * accept either.
+   */
+  return (LENCISHORT(go->neg_mru && go->mru != PPP_DEFMRU) +
+          LENCILONG(go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) +
+          LENCICHAP(go->neg_chap) +
+          LENCISHORT(!go->neg_chap && go->neg_upap) +
+          LENCILQR(go->neg_lqr) +
+          LENCICBCP(go->neg_cbcp) +
+          LENCILONG(go->neg_magicnumber) +
+          LENCIVOID(go->neg_pcompression) +
+          LENCIVOID(go->neg_accompression));
+}
+
+
+/*
+ * lcp_addci - Add our desired CIs to a packet.
+ */
+static void
+lcp_addci(fsm *f, u_char *ucp, int *lenp)
+{
+  lcp_options *go = &lcp_gotoptions[f->unit];
+  u_char *start_ucp = ucp;
+
+#define ADDCIVOID(opt, neg) \
+  if (neg) { \
+    LCPDEBUG((LOG_INFO, "lcp_addci: opt=%d\n", opt)); \
+    PUTCHAR(opt, ucp); \
+    PUTCHAR(CILEN_VOID, ucp); \
+  }
+#define ADDCISHORT(opt, neg, val) \
+  if (neg) { \
+    LCPDEBUG((LOG_INFO, "lcp_addci: INT opt=%d %X\n", opt, val)); \
+    PUTCHAR(opt, ucp); \
+    PUTCHAR(CILEN_SHORT, ucp); \
+    PUTSHORT(val, ucp); \
+  }
+#define ADDCICHAP(opt, neg, val, digest) \
+  if (neg) { \
+    LCPDEBUG((LOG_INFO, "lcp_addci: CHAP opt=%d %X\n", opt, val)); \
+    PUTCHAR(opt, ucp); \
+    PUTCHAR(CILEN_CHAP, ucp); \
+    PUTSHORT(val, ucp); \
+    PUTCHAR(digest, ucp); \
+  }
+#define ADDCILONG(opt, neg, val) \
+  if (neg) { \
+    LCPDEBUG((LOG_INFO, "lcp_addci: L opt=%d %lX\n", opt, val)); \
+    PUTCHAR(opt, ucp); \
+    PUTCHAR(CILEN_LONG, ucp); \
+    PUTLONG(val, ucp); \
+  }
+#define ADDCILQR(opt, neg, val) \
+  if (neg) { \
+    LCPDEBUG((LOG_INFO, "lcp_addci: LQR opt=%d %lX\n", opt, val)); \
+    PUTCHAR(opt, ucp); \
+    PUTCHAR(CILEN_LQR, ucp); \
+    PUTSHORT(PPP_LQR, ucp); \
+    PUTLONG(val, ucp); \
+  }
+#define ADDCICHAR(opt, neg, val) \
+  if (neg) { \
+    LCPDEBUG((LOG_INFO, "lcp_addci: CHAR opt=%d %X '%z'\n", opt, val, val)); \
+    PUTCHAR(opt, ucp); \
+    PUTCHAR(CILEN_CHAR, ucp); \
+    PUTCHAR(val, ucp); \
+  }
+
+  ADDCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
+  ADDCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
+  ADDCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
+  ADDCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
+  ADDCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
+  ADDCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
+  ADDCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
+  ADDCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
+  ADDCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
+
+  if (ucp - start_ucp != *lenp) {
+    /* this should never happen, because peer_mtu should be 1500 */
+    LCPDEBUG((LOG_ERR, "Bug in lcp_addci: wrong length\n"));
+  }
+}
+
+
+/*
+ * lcp_ackci - Ack our CIs.
+ * This should not modify any state if the Ack is bad.
+ *
+ * Returns:
+ *  0 - Ack was bad.
+ *  1 - Ack was good.
+ */
+static int
+lcp_ackci(fsm *f, u_char *p, int len)
+{
+  lcp_options *go = &lcp_gotoptions[f->unit];
+  u_char cilen, citype, cichar;
+  u_short cishort;
+  u32_t cilong;
+
+  /*
+   * CIs must be in exactly the same order that we sent.
+   * Check packet length and CI length at each step.
+   * If we find any deviations, then this packet is bad.
+   */
+#define ACKCIVOID(opt, neg) \
+  if (neg) { \
+    if ((len -= CILEN_VOID) < 0) \
+      goto bad; \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != CILEN_VOID || citype != opt) \
+      goto bad; \
+  }
+#define ACKCISHORT(opt, neg, val) \
+  if (neg) { \
+    if ((len -= CILEN_SHORT) < 0) \
+      goto bad; \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != CILEN_SHORT || citype != opt) \
+      goto bad; \
+    GETSHORT(cishort, p); \
+    if (cishort != val) \
+      goto bad; \
+  }
+#define ACKCICHAR(opt, neg, val) \
+  if (neg) { \
+    if ((len -= CILEN_CHAR) < 0) \
+      goto bad; \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != CILEN_CHAR || citype != opt) \
+      goto bad; \
+    GETCHAR(cichar, p); \
+    if (cichar != val) \
+      goto bad; \
+  }
+#define ACKCICHAP(opt, neg, val, digest) \
+  if (neg) { \
+    if ((len -= CILEN_CHAP) < 0) \
+      goto bad; \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != CILEN_CHAP || citype != opt) \
+      goto bad; \
+    GETSHORT(cishort, p); \
+    if (cishort != val) \
+      goto bad; \
+    GETCHAR(cichar, p); \
+    if (cichar != digest) \
+      goto bad; \
+  }
+#define ACKCILONG(opt, neg, val) \
+  if (neg) { \
+    if ((len -= CILEN_LONG) < 0) \
+      goto bad; \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != CILEN_LONG ||  citype != opt) \
+      goto bad; \
+    GETLONG(cilong, p); \
+    if (cilong != val) \
+      goto bad; \
+  }
+#define ACKCILQR(opt, neg, val) \
+  if (neg) { \
+    if ((len -= CILEN_LQR) < 0) \
+      goto bad; \
+    GETCHAR(citype, p); \
+    GETCHAR(cilen, p); \
+    if (cilen != CILEN_LQR || citype != opt) \
+      goto bad; \
+    GETSHORT(cishort, p); \
+    if (cishort != PPP_LQR) \
+      goto bad; \
+    GETLONG(cilong, p); \
+    if (cilong != val) \
+      goto bad; \
+  }
+
+  ACKCISHORT(CI_MRU, go->neg_mru && go->mru != PPP_DEFMRU, go->mru);
+  ACKCILONG(CI_ASYNCMAP, go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl, go->asyncmap);
+  ACKCICHAP(CI_AUTHTYPE, go->neg_chap, PPP_CHAP, go->chap_mdtype);
+  ACKCISHORT(CI_AUTHTYPE, !go->neg_chap && go->neg_upap, PPP_PAP);
+  ACKCILQR(CI_QUALITY, go->neg_lqr, go->lqr_period);
+  ACKCICHAR(CI_CALLBACK, go->neg_cbcp, CBCP_OPT);
+  ACKCILONG(CI_MAGICNUMBER, go->neg_magicnumber, go->magicnumber);
+  ACKCIVOID(CI_PCOMPRESSION, go->neg_pcompression);
+  ACKCIVOID(CI_ACCOMPRESSION, go->neg_accompression);
+
+  /*
+   * If there are any remaining CIs, then this packet is bad.
+   */
+  if (len != 0) {
+    goto bad;
+  }
+  LCPDEBUG((LOG_INFO, "lcp_acki: Ack\n"));
+  return (1);
+bad:
+  LCPDEBUG((LOG_WARNING, "lcp_acki: received bad Ack!\n"));
+  return (0);
+}
+
+
+/*
+ * lcp_nakci - Peer has sent a NAK for some of our CIs.
+ * This should not modify any state if the Nak is bad
+ * or if LCP is in the LS_OPENED state.
+ *
+ * Returns:
+ *  0 - Nak was bad.
+ *  1 - Nak was good.
+ */
+static int
+lcp_nakci(fsm *f, u_char *p, int len)
+{
+  lcp_options *go = &lcp_gotoptions[f->unit];
+  lcp_options *wo = &lcp_wantoptions[f->unit];
+  u_char citype, cichar, *next;
+  u_short cishort;
+  u32_t cilong;
+  lcp_options no;     /* options we've seen Naks for */
+  lcp_options try;    /* options to request next time */
+  int looped_back = 0;
+  int cilen;
+
+  BZERO(&no, sizeof(no));
+  try = *go;
+
+  /*
+   * Any Nak'd CIs must be in exactly the same order that we sent.
+   * Check packet length and CI length at each step.
+   * If we find any deviations, then this packet is bad.
+   */
+#define NAKCIVOID(opt, neg, code) \
+  if (go->neg && \
+      len >= CILEN_VOID && \
+      p[1] == CILEN_VOID && \
+      p[0] == opt) { \
+    len -= CILEN_VOID; \
+    INCPTR(CILEN_VOID, p); \
+    no.neg = 1; \
+    code \
+  }
+#define NAKCICHAP(opt, neg, code) \
+  if (go->neg && \
+      len >= CILEN_CHAP && \
+      p[1] == CILEN_CHAP && \
+      p[0] == opt) { \
+    len -= CILEN_CHAP; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    GETCHAR(cichar, p); \
+    no.neg = 1; \
+    code \
+  }
+#define NAKCICHAR(opt, neg, code) \
+  if (go->neg && \
+      len >= CILEN_CHAR && \
+      p[1] == CILEN_CHAR && \
+      p[0] == opt) { \
+    len -= CILEN_CHAR; \
+    INCPTR(2, p); \
+    GETCHAR(cichar, p); \
+    no.neg = 1; \
+    code \
+  }
+#define NAKCISHORT(opt, neg, code) \
+  if (go->neg && \
+      len >= CILEN_SHORT && \
+      p[1] == CILEN_SHORT && \
+      p[0] == opt) { \
+    len -= CILEN_SHORT; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    no.neg = 1; \
+    code \
+  }
+#define NAKCILONG(opt, neg, code) \
+  if (go->neg && \
+      len >= CILEN_LONG && \
+      p[1] == CILEN_LONG && \
+      p[0] == opt) { \
+    len -= CILEN_LONG; \
+    INCPTR(2, p); \
+    GETLONG(cilong, p); \
+    no.neg = 1; \
+    code \
+  }
+#define NAKCILQR(opt, neg, code) \
+  if (go->neg && \
+      len >= CILEN_LQR && \
+      p[1] == CILEN_LQR && \
+      p[0] == opt) { \
+    len -= CILEN_LQR; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    GETLONG(cilong, p); \
+    no.neg = 1; \
+    code \
+  }
+
+  /*
+   * We don't care if they want to send us smaller packets than
+   * we want.  Therefore, accept any MRU less than what we asked for,
+   * but then ignore the new value when setting the MRU in the kernel.
+   * If they send us a bigger MRU than what we asked, accept it, up to
+   * the limit of the default MRU we'd get if we didn't negotiate.
+   */
+  if (go->neg_mru && go->mru != PPP_DEFMRU) {
+    NAKCISHORT(CI_MRU, neg_mru,
+      if (cishort <= wo->mru || cishort < PPP_DEFMRU) {
+        try.mru = cishort;
+      }
+    );
+  }
+
+  /*
+   * Add any characters they want to our (receive-side) asyncmap.
+   */
+  if (go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl) {
+    NAKCILONG(CI_ASYNCMAP, neg_asyncmap,
+      try.asyncmap = go->asyncmap | cilong;
+    );
+  }
+
+  /*
+   * If they've nak'd our authentication-protocol, check whether
+   * they are proposing a different protocol, or a different
+   * hash algorithm for CHAP.
+   */
+  if ((go->neg_chap || go->neg_upap)
+      && len >= CILEN_SHORT
+      && p[0] == CI_AUTHTYPE && p[1] >= CILEN_SHORT && p[1] <= len) {
+    cilen = p[1];
+    len -= cilen;
+    no.neg_chap = go->neg_chap;
+    no.neg_upap = go->neg_upap;
+    INCPTR(2, p);
+    GETSHORT(cishort, p);
+    if (cishort == PPP_PAP && cilen == CILEN_SHORT) {
+      /*
+       * If we were asking for CHAP, they obviously don't want to do it.
+       * If we weren't asking for CHAP, then we were asking for PAP,
+       * in which case this Nak is bad.
+       */
+      if (!go->neg_chap) {
+        goto bad;
+      }
+      try.neg_chap = 0;
+    
+    } else if (cishort == PPP_CHAP && cilen == CILEN_CHAP) {
+      GETCHAR(cichar, p);
+      if (go->neg_chap) {
+        /*
+         * We were asking for CHAP/MD5; they must want a different
+         * algorithm.  If they can't do MD5, we'll have to stop
+         * asking for CHAP.
+         */
+        if (cichar != go->chap_mdtype) {
+          try.neg_chap = 0;
+        }
+      } else {
+        /*
+         * Stop asking for PAP if we were asking for it.
+         */
+        try.neg_upap = 0;
+      }
+    
+    } else {
+      /*
+       * We don't recognize what they're suggesting.
+       * Stop asking for what we were asking for.
+       */
+      if (go->neg_chap) {
+        try.neg_chap = 0;
+      } else {
+        try.neg_upap = 0;
+      }
+      p += cilen - CILEN_SHORT;
+    }
+  }
+
+  /*
+   * If they can't cope with our link quality protocol, we'll have
+   * to stop asking for LQR.  We haven't got any other protocol.
+   * If they Nak the reporting period, take their value XXX ?
+   */
+  NAKCILQR(CI_QUALITY, neg_lqr,
+    if (cishort != PPP_LQR) {
+      try.neg_lqr = 0;
+    } else {
+      try.lqr_period = cilong;
+    }
+  );
+
+  /*
+   * Only implementing CBCP...not the rest of the callback options
+   */
+  NAKCICHAR(CI_CALLBACK, neg_cbcp,
+    try.neg_cbcp = 0;
+  );
+
+  /*
+   * Check for a looped-back line.
+   */
+  NAKCILONG(CI_MAGICNUMBER, neg_magicnumber,
+    try.magicnumber = magic();
+    looped_back = 1;
+  );
+
+  /*
+   * Peer shouldn't send Nak for protocol compression or
+   * address/control compression requests; they should send
+   * a Reject instead.  If they send a Nak, treat it as a Reject.
+   */
+  NAKCIVOID(CI_PCOMPRESSION, neg_pcompression,
+    try.neg_pcompression = 0;
+  );
+  NAKCIVOID(CI_ACCOMPRESSION, neg_accompression,
+    try.neg_accompression = 0;
+  );
+
+  /*
+   * There may be remaining CIs, if the peer is requesting negotiation
+   * on an option that we didn't include in our request packet.
+   * If we see an option that we requested, or one we've already seen
+   * in this packet, then this packet is bad.
+   * If we wanted to respond by starting to negotiate on the requested
+   * option(s), we could, but we don't, because except for the
+   * authentication type and quality protocol, if we are not negotiating
+   * an option, it is because we were told not to.
+   * For the authentication type, the Nak from the peer means
+   * `let me authenticate myself with you' which is a bit pointless.
+   * For the quality protocol, the Nak means `ask me to send you quality
+   * reports', but if we didn't ask for them, we don't want them.
+   * An option we don't recognize represents the peer asking to
+   * negotiate some option we don't support, so ignore it.
+   */
+  while (len > CILEN_VOID) {
+    GETCHAR(citype, p);
+    GETCHAR(cilen, p);
+    if (cilen < CILEN_VOID || (len -= cilen) < 0) {
+      goto bad;
+    }
+    next = p + cilen - 2;
+
+    switch (citype) {
+      case CI_MRU:
+        if ((go->neg_mru && go->mru != PPP_DEFMRU)
+            || no.neg_mru || cilen != CILEN_SHORT) {
+          goto bad;
+        }
+        GETSHORT(cishort, p);
+        if (cishort < PPP_DEFMRU) {
+          try.mru = cishort;
+        }
+        break;
+      case CI_ASYNCMAP:
+        if ((go->neg_asyncmap && go->asyncmap != 0xFFFFFFFFl)
+            || no.neg_asyncmap || cilen != CILEN_LONG) {
+          goto bad;
+        }
+        break;
+      case CI_AUTHTYPE:
+        if (go->neg_chap || no.neg_chap || go->neg_upap || no.neg_upap) {
+          goto bad;
+        }
+        break;
+      case CI_MAGICNUMBER:
+        if (go->neg_magicnumber || no.neg_magicnumber ||
+            cilen != CILEN_LONG) {
+          goto bad;
+        }
+        break;
+      case CI_PCOMPRESSION:
+        if (go->neg_pcompression || no.neg_pcompression
+            || cilen != CILEN_VOID) {
+          goto bad;
+        }
+        break;
+      case CI_ACCOMPRESSION:
+        if (go->neg_accompression || no.neg_accompression
+            || cilen != CILEN_VOID) {
+          goto bad;
+        }
+        break;
+      case CI_QUALITY:
+        if (go->neg_lqr || no.neg_lqr || cilen != CILEN_LQR) {
+          goto bad;
+        }
+        break;
+    }
+    p = next;
+  }
+
+  /* If there is still anything left, this packet is bad. */
+  if (len != 0) {
+    goto bad;
+  }
+
+  /*
+  * OK, the Nak is good.  Now we can update state.
+  */
+  if (f->state != LS_OPENED) {
+    if (looped_back) {
+      if (++try.numloops >= lcp_loopbackfail) {
+        LCPDEBUG((LOG_NOTICE, "Serial line is looped back.\n"));
+        lcp_close(f->unit, "Loopback detected");
+      }
+    } else {
+      try.numloops = 0;
+    }
+    *go = try;
+  }
+
+  return 1;
+
+bad:
+  LCPDEBUG((LOG_WARNING, "lcp_nakci: received bad Nak!\n"));
+  return 0;
+}
+
+
+/*
+ * lcp_rejci - Peer has Rejected some of our CIs.
+ * This should not modify any state if the Reject is bad
+ * or if LCP is in the LS_OPENED state.
+ *
+ * Returns:
+ *  0 - Reject was bad.
+ *  1 - Reject was good.
+ */
+static int
+lcp_rejci(fsm *f, u_char *p, int len)
+{
+  lcp_options *go = &lcp_gotoptions[f->unit];
+  u_char cichar;
+  u_short cishort;
+  u32_t cilong;
+  lcp_options try; /* options to request next time */
+
+  try = *go;
+
+  /*
+   * Any Rejected CIs must be in exactly the same order that we sent.
+   * Check packet length and CI length at each step.
+   * If we find any deviations, then this packet is bad.
+   */
+#define REJCIVOID(opt, neg) \
+  if (go->neg && \
+      len >= CILEN_VOID && \
+      p[1] == CILEN_VOID && \
+      p[0] == opt) { \
+    len -= CILEN_VOID; \
+    INCPTR(CILEN_VOID, p); \
+    try.neg = 0; \
+    LCPDEBUG((LOG_INFO, "lcp_rejci: void opt %d rejected\n", opt)); \
+  }
+#define REJCISHORT(opt, neg, val) \
+  if (go->neg && \
+      len >= CILEN_SHORT && \
+      p[1] == CILEN_SHORT && \
+      p[0] == opt) { \
+    len -= CILEN_SHORT; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    /* Check rejected value. */ \
+    if (cishort != val) { \
+      goto bad; \
+    } \
+    try.neg = 0; \
+    LCPDEBUG((LOG_INFO,"lcp_rejci: short opt %d rejected\n", opt)); \
+  }
+#define REJCICHAP(opt, neg, val, digest) \
+  if (go->neg && \
+      len >= CILEN_CHAP && \
+      p[1] == CILEN_CHAP && \
+      p[0] == opt) { \
+    len -= CILEN_CHAP; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    GETCHAR(cichar, p); \
+    /* Check rejected value. */ \
+    if (cishort != val || cichar != digest) { \
+      goto bad; \
+    } \
+    try.neg = 0; \
+    try.neg_upap = 0; \
+    LCPDEBUG((LOG_INFO,"lcp_rejci: chap opt %d rejected\n", opt)); \
+  }
+#define REJCILONG(opt, neg, val) \
+  if (go->neg && \
+      len >= CILEN_LONG && \
+      p[1] == CILEN_LONG && \
+      p[0] == opt) { \
+    len -= CILEN_LONG; \
+    INCPTR(2, p); \
+    GETLONG(cilong, p); \
+    /* Check rejected value. */ \
+    if (cilong != val) { \
+      goto bad; \
+    } \
+    try.neg = 0; \
+    LCPDEBUG((LOG_INFO,"lcp_rejci: long opt %d rejected\n", opt)); \
+  }
+#define REJCILQR(opt, neg, val) \
+  if (go->neg && \
+      len >= CILEN_LQR && \
+      p[1] == CILEN_LQR && \
+      p[0] == opt) { \
+    len -= CILEN_LQR; \
+    INCPTR(2, p); \
+    GETSHORT(cishort, p); \
+    GETLONG(cilong, p); \
+    /* Check rejected value. */ \
+    if (cishort != PPP_LQR || cilong != val) { \
+      goto bad; \
+    } \
+    try.neg = 0; \
+    LCPDEBUG((LOG_INFO,"lcp_rejci: LQR opt %d rejected\n", opt)); \
+  }
+#define REJCICBCP(opt, neg, val) \
+  if (go->neg && \
+      len >= CILEN_CBCP && \
+      p[1] == CILEN_CBCP && \
+      p[0] == opt) { \
+    len -= CILEN_CBCP; \
+    INCPTR(2, p); \
+    GETCHAR(cichar, p); \
+    /* Check rejected value. */ \
+    if (cichar != val) { \
+      goto bad; \
+    } \
+    try.neg = 0; \
+    LCPDEBUG((LOG_INFO,"lcp_rejci: Callback opt %d rejected\n", opt)); \
+  }
+  
+  REJCISHORT(CI_MRU, neg_mru, go->mru);
+  REJCILONG(CI_ASYNCMAP, neg_asyncmap, go->asyncmap);
+  REJCICHAP(CI_AUTHTYPE, neg_chap, PPP_CHAP, go->chap_mdtype);
+  if (!go->neg_chap) {
+    REJCISHORT(CI_AUTHTYPE, neg_upap, PPP_PAP);
+  }
+  REJCILQR(CI_QUALITY, neg_lqr, go->lqr_period);
+  REJCICBCP(CI_CALLBACK, neg_cbcp, CBCP_OPT);
+  REJCILONG(CI_MAGICNUMBER, neg_magicnumber, go->magicnumber);
+  REJCIVOID(CI_PCOMPRESSION, neg_pcompression);
+  REJCIVOID(CI_ACCOMPRESSION, neg_accompression);
+  
+  /*
+   * If there are any remaining CIs, then this packet is bad.
+   */
+  if (len != 0) {
+    goto bad;
+  }
+  /*
+   * Now we can update state.
+   */
+  if (f->state != LS_OPENED) {
+    *go = try;
+  }
+  return 1;
+  
+bad:
+  LCPDEBUG((LOG_WARNING, "lcp_rejci: received bad Reject!\n"));
+  return 0;
+}
+
+
+/*
+ * lcp_reqci - Check the peer's requested CIs and send appropriate response.
+ *
+ * Returns: CONFACK, CONFNAK or CONFREJ and input packet modified
+ * appropriately.  If reject_if_disagree is non-zero, doesn't return
+ * CONFNAK; returns CONFREJ if it can't return CONFACK.
+ */
+static int
+lcp_reqci(fsm *f, 
+          u_char *inp,    /* Requested CIs */
+          int *lenp,      /* Length of requested CIs */
+          int reject_if_disagree)
+{
+  lcp_options *go = &lcp_gotoptions[f->unit];
+  lcp_options *ho = &lcp_hisoptions[f->unit];
+  lcp_options *ao = &lcp_allowoptions[f->unit];
+  u_char *cip, *next;         /* Pointer to current and next CIs */
+  int cilen, citype, cichar;  /* Parsed len, type, char value */
+  u_short cishort;            /* Parsed short value */
+  u32_t cilong;               /* Parse long value */
+  int rc = CONFACK;           /* Final packet return code */
+  int orc;                    /* Individual option return code */
+  u_char *p;                  /* Pointer to next char to parse */
+  u_char *rejp;               /* Pointer to next char in reject frame */
+  u_char *nakp;               /* Pointer to next char in Nak frame */
+  int l = *lenp;              /* Length left */
+#if TRACELCP > 0
+  char traceBuf[80];
+  int traceNdx = 0;
+#endif
+
+  /*
+   * Reset all his options.
+   */
+  BZERO(ho, sizeof(*ho));
+
+  /*
+   * Process all his options.
+   */
+  next = inp;
+  nakp = nak_buffer;
+  rejp = inp;
+  while (l) {
+    orc = CONFACK;      /* Assume success */
+    cip = p = next;     /* Remember begining of CI */
+    if (l < 2 ||        /* Not enough data for CI header or */
+        p[1] < 2 ||     /*  CI length too small or */
+        p[1] > l) {     /*  CI length too big? */
+      LCPDEBUG((LOG_WARNING, "lcp_reqci: bad CI length!\n"));
+      orc = CONFREJ;    /* Reject bad CI */
+      cilen = l;        /* Reject till end of packet */
+      l = 0;            /* Don't loop again */
+      citype = 0;
+      goto endswitch;
+    }
+    GETCHAR(citype, p); /* Parse CI type */
+    GETCHAR(cilen, p);  /* Parse CI length */
+    l -= cilen;         /* Adjust remaining length */
+    next += cilen;      /* Step to next CI */
+
+    switch (citype) {   /* Check CI type */
+      case CI_MRU:
+        if (!ao->neg_mru) {    /* Allow option? */
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Reject MRU - not allowed\n"));
+          orc = CONFREJ;    /* Reject CI */
+          break;
+        } else if (cilen != CILEN_SHORT) {  /* Check CI length */
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Reject MRU - bad length\n"));
+          orc = CONFREJ;    /* Reject CI */
+          break;
+        }
+        GETSHORT(cishort, p);  /* Parse MRU */
+
+        /*
+         * He must be able to receive at least our minimum.
+         * No need to check a maximum.  If he sends a large number,
+         * we'll just ignore it.
+         */
+        if (cishort < PPP_MINMRU) {
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Nak - MRU too small\n"));
+          orc = CONFNAK;    /* Nak CI */
+          PUTCHAR(CI_MRU, nakp);
+          PUTCHAR(CILEN_SHORT, nakp);
+          PUTSHORT(PPP_MINMRU, nakp);  /* Give him a hint */
+          break;
+        }
+        ho->neg_mru = 1;    /* Remember he sent MRU */
+        ho->mru = cishort;    /* And remember value */
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MRU %d", cishort);
+        traceNdx = strlen(traceBuf);
+#endif
+        break;
+
+      case CI_ASYNCMAP:
+        if (!ao->neg_asyncmap) {
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Reject ASYNCMAP not allowed\n"));
+          orc = CONFREJ;
+          break;
+        } else if (cilen != CILEN_LONG) {
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Reject ASYNCMAP bad length\n"));
+          orc = CONFREJ;
+          break;
+        }
+        GETLONG(cilong, p);
+        
+        /*
+         * Asyncmap must have set at least the bits
+         * which are set in lcp_allowoptions[unit].asyncmap.
+         */
+        if ((ao->asyncmap & ~cilong) != 0) {
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Nak ASYNCMAP %lX missing %lX\n", 
+                    cilong, ao->asyncmap));
+          orc = CONFNAK;
+          PUTCHAR(CI_ASYNCMAP, nakp);
+          PUTCHAR(CILEN_LONG, nakp);
+          PUTLONG(ao->asyncmap | cilong, nakp);
+          break;
+        }
+        ho->neg_asyncmap = 1;
+        ho->asyncmap = cilong;
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ASYNCMAP=%lX", cilong);
+        traceNdx = strlen(traceBuf);
+#endif
+        break;
+
+      case CI_AUTHTYPE:
+        if (cilen < CILEN_SHORT) {
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Reject AUTHTYPE missing arg\n"));
+          orc = CONFREJ;
+          break;
+        } else if (!(ao->neg_upap || ao->neg_chap)) {
+          /*
+           * Reject the option if we're not willing to authenticate.
+           */
+          LCPDEBUG((LOG_INFO, "lcp_reqci: Reject AUTHTYPE not allowed\n"));
+          orc = CONFREJ;
+          break;
+        }
+        GETSHORT(cishort, p);
+        
+        /*
+         * Authtype must be UPAP or CHAP.
+         *
+         * Note: if both ao->neg_upap and ao->neg_chap are set,
+         * and the peer sends a Configure-Request with two
+         * authenticate-protocol requests, one for CHAP and one
+         * for UPAP, then we will reject the second request.
+         * Whether we end up doing CHAP or UPAP depends then on
+         * the ordering of the CIs in the peer's Configure-Request.
+         */
+        
+        if (cishort == PPP_PAP) {
+          if (ho->neg_chap) {  /* we've already accepted CHAP */
+            LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE PAP already accepted\n"));
+            orc = CONFREJ;
+            break;
+          } else if (cilen != CILEN_SHORT) {
+            LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE PAP bad len\n"));
+            orc = CONFREJ;
+            break;
+          }
+          if (!ao->neg_upap) {  /* we don't want to do PAP */
+            LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE PAP not allowed\n"));
+            orc = CONFNAK;  /* NAK it and suggest CHAP */
+            PUTCHAR(CI_AUTHTYPE, nakp);
+            PUTCHAR(CILEN_CHAP, nakp);
+            PUTSHORT(PPP_CHAP, nakp);
+            PUTCHAR(ao->chap_mdtype, nakp);
+            break;
+          }
+          ho->neg_upap = 1;
+#if TRACELCP > 0
+          snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PAP (%X)", cishort);
+          traceNdx = strlen(traceBuf);
+#endif
+          break;
+        }
+        if (cishort == PPP_CHAP) {
+          if (ho->neg_upap) {  /* we've already accepted PAP */
+            LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE CHAP accepted PAP\n"));
+            orc = CONFREJ;
+            break;
+          } else if (cilen != CILEN_CHAP) {
+            LCPDEBUG((LOG_WARNING, "lcp_reqci: Reject AUTHTYPE CHAP bad len\n"));
+            orc = CONFREJ;
+            break;
+          }
+          if (!ao->neg_chap) {  /* we don't want to do CHAP */
+            LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE CHAP not allowed\n"));
+            orc = CONFNAK;  /* NAK it and suggest PAP */
+            PUTCHAR(CI_AUTHTYPE, nakp);
+            PUTCHAR(CILEN_SHORT, nakp);
+            PUTSHORT(PPP_PAP, nakp);
+            break;
+          }
+          GETCHAR(cichar, p);  /* get digest type*/
+          if (cichar != CHAP_DIGEST_MD5
+#ifdef CHAPMS
+              && cichar != CHAP_MICROSOFT
+#endif
+          ) {
+            LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE CHAP digest=%d\n", cichar));
+            orc = CONFNAK;
+            PUTCHAR(CI_AUTHTYPE, nakp);
+            PUTCHAR(CILEN_CHAP, nakp);
+            PUTSHORT(PPP_CHAP, nakp);
+            PUTCHAR(ao->chap_mdtype, nakp);
+            break;
+          }
+#if TRACELCP > 0
+          snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CHAP %X,%d", cishort, cichar);
+          traceNdx = strlen(traceBuf);
+#endif
+          ho->chap_mdtype = cichar; /* save md type */
+          ho->neg_chap = 1;
+          break;
+        }
+        
+        /*
+         * We don't recognize the protocol they're asking for.
+         * Nak it with something we're willing to do.
+         * (At this point we know ao->neg_upap || ao->neg_chap.)
+         */
+        orc = CONFNAK;
+        PUTCHAR(CI_AUTHTYPE, nakp);
+        if (ao->neg_chap) {
+          LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE %d req CHAP\n", cishort));
+          PUTCHAR(CILEN_CHAP, nakp);
+          PUTSHORT(PPP_CHAP, nakp);
+          PUTCHAR(ao->chap_mdtype, nakp);
+        } else {
+          LCPDEBUG((LOG_WARNING, "lcp_reqci: Nak AUTHTYPE %d req PAP\n", cishort));
+          PUTCHAR(CILEN_SHORT, nakp);
+          PUTSHORT(PPP_PAP, nakp);
+        }
+        break;
+      
+      case CI_QUALITY:
+        GETSHORT(cishort, p);
+        GETLONG(cilong, p);
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " QUALITY (%x %x)", cishort, (unsigned int) cilong);
+        traceNdx = strlen(traceBuf);
+#endif
+
+        if (!ao->neg_lqr ||
+            cilen != CILEN_LQR) {
+          orc = CONFREJ;
+          break;
+        }
+        
+        /*
+         * Check the protocol and the reporting period.
+         * XXX When should we Nak this, and what with?
+         */
+        if (cishort != PPP_LQR) {
+          orc = CONFNAK;
+          PUTCHAR(CI_QUALITY, nakp);
+          PUTCHAR(CILEN_LQR, nakp);
+          PUTSHORT(PPP_LQR, nakp);
+          PUTLONG(ao->lqr_period, nakp);
+          break;
+        }
+        break;
+      
+      case CI_MAGICNUMBER:
+        if (!(ao->neg_magicnumber || go->neg_magicnumber) ||
+            cilen != CILEN_LONG) {
+          orc = CONFREJ;
+          break;
+        }
+        GETLONG(cilong, p);
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " MAGICNUMBER (%lX)", cilong);
+        traceNdx = strlen(traceBuf);
+#endif
+
+        /*
+         * He must have a different magic number.
+         */
+        if (go->neg_magicnumber &&
+            cilong == go->magicnumber) {
+          cilong = magic();  /* Don't put magic() inside macro! */
+          orc = CONFNAK;
+          PUTCHAR(CI_MAGICNUMBER, nakp);
+          PUTCHAR(CILEN_LONG, nakp);
+          PUTLONG(cilong, nakp);
+          break;
+        }
+        ho->neg_magicnumber = 1;
+        ho->magicnumber = cilong;
+        break;
+      
+      
+      case CI_PCOMPRESSION:
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " PCOMPRESSION");
+        traceNdx = strlen(traceBuf);
+#endif
+        if (!ao->neg_pcompression ||
+            cilen != CILEN_VOID) {
+          orc = CONFREJ;
+          break;
+        }
+        ho->neg_pcompression = 1;
+        break;
+      
+      case CI_ACCOMPRESSION:
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " ACCOMPRESSION");
+        traceNdx = strlen(traceBuf);
+#endif
+        if (!ao->neg_accompression ||
+            cilen != CILEN_VOID) {
+          orc = CONFREJ;
+          break;
+        }
+        ho->neg_accompression = 1;
+        break;
+      
+      case CI_MRRU:
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_MRRU");
+        traceNdx = strlen(traceBuf);
+#endif
+        orc = CONFREJ;
+        break;
+      
+      case CI_SSNHF:
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_SSNHF");
+        traceNdx = strlen(traceBuf);
+#endif
+        orc = CONFREJ;
+        break;
+      
+      case CI_EPDISC:
+#if TRACELCP > 0
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " CI_EPDISC");
+        traceNdx = strlen(traceBuf);
+#endif
+        orc = CONFREJ;
+        break;
+      
+      default:
+#if TRACELCP
+        snprintf(&traceBuf[traceNdx], sizeof(traceBuf), " unknown %d", citype);
+        traceNdx = strlen(traceBuf);
+#endif
+        orc = CONFREJ;
+        break;
+    }
+
+  endswitch:
+#if TRACELCP
+    if (traceNdx >= 80 - 32) {
+      LCPDEBUG((LOG_INFO, "lcp_reqci: rcvd%s\n", traceBuf));
+      traceNdx = 0;
+    }
+#endif
+    if (orc == CONFACK && /* Good CI */
+        rc != CONFACK) {  /*  but prior CI wasnt? */
+      continue;           /* Don't send this one */
+    }
+
+    if (orc == CONFNAK) {     /* Nak this CI? */
+      if (reject_if_disagree  /* Getting fed up with sending NAKs? */
+          && citype != CI_MAGICNUMBER) {
+        orc = CONFREJ;        /* Get tough if so */
+      } else {
+        if (rc == CONFREJ) {  /* Rejecting prior CI? */
+          continue;           /* Don't send this one */
+        }
+        rc = CONFNAK;
+      }
+    }
+    if (orc == CONFREJ) {        /* Reject this CI */
+      rc = CONFREJ;
+      if (cip != rejp) {         /* Need to move rejected CI? */
+        BCOPY(cip, rejp, cilen); /* Move it */
+      }
+      INCPTR(cilen, rejp);       /* Update output pointer */
+    }
+  }
+
+  /*
+   * If we wanted to send additional NAKs (for unsent CIs), the
+   * code would go here.  The extra NAKs would go at *nakp.
+   * At present there are no cases where we want to ask the
+   * peer to negotiate an option.
+   */
+
+  switch (rc) {
+    case CONFACK:
+      *lenp = (int)(next - inp);
+      break;
+    case CONFNAK:
+      /*
+       * Copy the Nak'd options from the nak_buffer to the caller's buffer.
+       */
+      *lenp = (int)(nakp - nak_buffer);
+      BCOPY(nak_buffer, inp, *lenp);
+      break;
+    case CONFREJ:
+      *lenp = (int)(rejp - inp);
+      break;
+  }
+
+#if TRACELCP > 0
+  if (traceNdx > 0) {
+    LCPDEBUG((LOG_INFO, "lcp_reqci: %s\n", traceBuf));
+  }
+#endif
+  LCPDEBUG((LOG_INFO, "lcp_reqci: returning CONF%s.\n", CODENAME(rc)));
+  return (rc);      /* Return final code */
+}
+
+
+/*
+ * lcp_up - LCP has come UP.
+ */
+static void
+lcp_up(fsm *f)
+{
+  lcp_options *wo = &lcp_wantoptions[f->unit];
+  lcp_options *ho = &lcp_hisoptions[f->unit];
+  lcp_options *go = &lcp_gotoptions[f->unit];
+  lcp_options *ao = &lcp_allowoptions[f->unit];
+
+  if (!go->neg_magicnumber) {
+    go->magicnumber = 0;
+  }
+  if (!ho->neg_magicnumber) {
+    ho->magicnumber = 0;
+  }
+
+  /*
+   * Set our MTU to the smaller of the MTU we wanted and
+   * the MRU our peer wanted.  If we negotiated an MRU,
+   * set our MRU to the larger of value we wanted and
+   * the value we got in the negotiation.
+   */
+  ppp_send_config(f->unit, LWIP_MIN(ao->mru, (ho->neg_mru? ho->mru: PPP_MRU)),
+                 (ho->neg_asyncmap? ho->asyncmap: 0xffffffffl),
+                  ho->neg_pcompression, ho->neg_accompression);
+  /*
+   * If the asyncmap hasn't been negotiated, we really should
+   * set the receive asyncmap to ffffffff, but we set it to 0
+   * for backwards contemptibility.
+   */
+  ppp_recv_config(f->unit, (go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU),
+                 (go->neg_asyncmap? go->asyncmap: 0x00000000),
+                  go->neg_pcompression, go->neg_accompression);
+
+  if (ho->neg_mru) {
+    peer_mru[f->unit] = ho->mru;
+  }
+
+  lcp_echo_lowerup(f->unit); /* Enable echo messages */
+
+  link_established(f->unit);
+}
+
+
+/*
+ * lcp_down - LCP has gone DOWN.
+ *
+ * Alert other protocols.
+ */
+static void
+lcp_down(fsm *f)
+{
+  lcp_options *go = &lcp_gotoptions[f->unit];
+
+  lcp_echo_lowerdown(f->unit);
+
+  link_down(f->unit);
+
+  ppp_send_config(f->unit, PPP_MRU, 0xffffffffl, 0, 0);
+  ppp_recv_config(f->unit, PPP_MRU,
+                  (go->neg_asyncmap? go->asyncmap: 0x00000000),
+                   go->neg_pcompression, go->neg_accompression);
+  peer_mru[f->unit] = PPP_MRU;
+}
+
+
+/*
+ * lcp_starting - LCP needs the lower layer up.
+ */
+static void
+lcp_starting(fsm *f)
+{
+  link_required(f->unit);
+}
+
+
+/*
+ * lcp_finished - LCP has finished with the lower layer.
+ */
+static void
+lcp_finished(fsm *f)
+{
+  link_terminated(f->unit);
+}
+
+
+#if 0
+/*
+ * print_string - print a readable representation of a string using
+ * printer.
+ */
+static void
+print_string( char *p, int len, void (*printer) (void *, char *, ...), void *arg)
+{
+  int c;
+  
+  printer(arg, "\"");
+  for (; len > 0; --len) {
+    c = *p++;
+    if (' ' <= c && c <= '~') {
+        if (c == '\\' || c == '"') {
+          printer(arg, "\\");
+        }
+        printer(arg, "%c", c);
+    } else {
+      switch (c) {
+        case '\n':
+          printer(arg, "\\n");
+          break;
+        case '\r':
+          printer(arg, "\\r");
+          break;
+        case '\t':
+          printer(arg, "\\t");
+          break;
+        default:
+          printer(arg, "\\%.3o", c);
+        }
+    }
+  }
+  printer(arg, "\"");
+}
+
+
+/*
+ * lcp_printpkt - print the contents of an LCP packet.
+ */
+static char *lcp_codenames[] = {
+  "ConfReq", "ConfAck", "ConfNak", "ConfRej",
+  "TermReq", "TermAck", "CodeRej", "ProtRej",
+  "EchoReq", "EchoRep", "DiscReq"
+};
+
+static int
+lcp_printpkt( u_char *p, int plen, void (*printer) (void *, char *, ...), void *arg)
+{
+  int code, id, len, olen;
+  u_char *pstart, *optend;
+  u_short cishort;
+  u32_t cilong;
+
+  if (plen < HEADERLEN) {
+    return 0;
+  }
+  pstart = p;
+  GETCHAR(code, p);
+  GETCHAR(id, p);
+  GETSHORT(len, p);
+  if (len < HEADERLEN || len > plen) {
+    return 0;
+  }
+
+  if (code >= 1 && code <= sizeof(lcp_codenames) / sizeof(char *)) {
+    printer(arg, " %s", lcp_codenames[code-1]);
+  } else {
+    printer(arg, " code=0x%x", code);
+  }
+  printer(arg, " id=0x%x", id);
+  len -= HEADERLEN;
+  switch (code) {
+    case CONFREQ:
+    case CONFACK:
+    case CONFNAK:
+    case CONFREJ:
+      /* print option list */
+      while (len >= 2) {
+        GETCHAR(code, p);
+        GETCHAR(olen, p);
+        p -= 2;
+        if (olen < 2 || olen > len) {
+          break;
+        }
+        printer(arg, " <");
+        len -= olen;
+        optend = p + olen;
+        switch (code) {
+          case CI_MRU:
+            if (olen == CILEN_SHORT) {
+              p += 2;
+              GETSHORT(cishort, p);
+              printer(arg, "mru %d", cishort);
+            }
+            break;
+          case CI_ASYNCMAP:
+            if (olen == CILEN_LONG) {
+              p += 2;
+              GETLONG(cilong, p);
+              printer(arg, "asyncmap 0x%lx", cilong);
+            }
+            break;
+          case CI_AUTHTYPE:
+            if (olen >= CILEN_SHORT) {
+              p += 2;
+              printer(arg, "auth ");
+              GETSHORT(cishort, p);
+              switch (cishort) {
+                case PPP_PAP:
+                  printer(arg, "pap");
+                  break;
+                case PPP_CHAP:
+                  printer(arg, "chap");
+                  break;
+                default:
+                  printer(arg, "0x%x", cishort);
+              }
+            }
+            break;
+          case CI_QUALITY:
+            if (olen >= CILEN_SHORT) {
+              p += 2;
+              printer(arg, "quality ");
+              GETSHORT(cishort, p);
+              switch (cishort) {
+                case PPP_LQR:
+                  printer(arg, "lqr");
+                  break;
+                default:
+                  printer(arg, "0x%x", cishort);
+              }
+            }
+            break;
+          case CI_CALLBACK:
+            if (olen >= CILEN_CHAR) {
+              p += 2;
+              printer(arg, "callback ");
+              GETSHORT(cishort, p);
+              switch (cishort) {
+                case CBCP_OPT:
+                  printer(arg, "CBCP");
+                  break;
+                default:
+                  printer(arg, "0x%x", cishort);
+              }
+            }
+            break;
+          case CI_MAGICNUMBER:
+            if (olen == CILEN_LONG) {
+              p += 2;
+              GETLONG(cilong, p);
+              printer(arg, "magic 0x%x", cilong);
+            }
+            break;
+          case CI_PCOMPRESSION:
+            if (olen == CILEN_VOID) {
+              p += 2;
+              printer(arg, "pcomp");
+            }
+            break;
+          case CI_ACCOMPRESSION:
+            if (olen == CILEN_VOID) {
+              p += 2;
+              printer(arg, "accomp");
+            }
+            break;
+        }
+        while (p < optend) {
+          GETCHAR(code, p);
+          printer(arg, " %.2x", code);
+        }
+        printer(arg, ">");
+      }
+      break;
+    
+    case TERMACK:
+    case TERMREQ:
+      if (len > 0 && *p >= ' ' && *p < 0x7f) {
+        printer(arg, " ");
+        print_string((char*)p, len, printer, arg);
+        p += len;
+        len = 0;
+      }
+      break;
+    
+    case ECHOREQ:
+    case ECHOREP:
+    case DISCREQ:
+      if (len >= 4) {
+        GETLONG(cilong, p);
+        printer(arg, " magic=0x%x", cilong);
+        p += 4;
+        len -= 4;
+      }
+      break;
+  }
+
+  /* print the rest of the bytes in the packet */
+  for (; len > 0; --len) {
+    GETCHAR(code, p);
+    printer(arg, " %.2x", code);
+  }
+
+  return (int)(p - pstart);
+}
+#endif
+
+/*
+ * Time to shut down the link because there is nothing out there.
+ */
+static void
+LcpLinkFailure (fsm *f)
+{
+  if (f->state == LS_OPENED) {
+    LCPDEBUG((LOG_INFO, "No response to %d echo-requests\n", lcp_echos_pending));
+    LCPDEBUG((LOG_NOTICE, "Serial link appears to be disconnected.\n"));
+    lcp_close(f->unit, "Peer not responding");
+  }
+}
+
+/*
+ * Timer expired for the LCP echo requests from this process.
+ */
+static void
+LcpEchoCheck (fsm *f)
+{
+  LcpSendEchoRequest (f);
+
+  /*
+   * Start the timer for the next interval.
+   */
+  LWIP_ASSERT("lcp_echo_timer_running == 0", lcp_echo_timer_running == 0);
+
+  TIMEOUT (LcpEchoTimeout, f, lcp_echo_interval);
+  lcp_echo_timer_running = 1;
+}
+
+/*
+ * LcpEchoTimeout - Timer expired on the LCP echo
+ */
+static void
+LcpEchoTimeout (void *arg)
+{
+  if (lcp_echo_timer_running != 0) {
+    lcp_echo_timer_running = 0;
+    LcpEchoCheck ((fsm *) arg);
+  }
+}
+
+/*
+ * LcpEchoReply - LCP has received a reply to the echo
+ */
+static void
+lcp_received_echo_reply (fsm *f, int id, u_char *inp, int len)
+{
+  u32_t magic;
+
+  LWIP_UNUSED_ARG(id);
+
+  /* Check the magic number - don't count replies from ourselves. */
+  if (len < 4) {
+    LCPDEBUG((LOG_WARNING, "lcp: received short Echo-Reply, length %d\n", len));
+    return;
+  }
+  GETLONG(magic, inp);
+  if (lcp_gotoptions[f->unit].neg_magicnumber && magic == lcp_gotoptions[f->unit].magicnumber) {
+    LCPDEBUG((LOG_WARNING, "appear to have received our own echo-reply!\n"));
+    return;
+  }
+  
+  /* Reset the number of outstanding echo frames */
+  lcp_echos_pending = 0;
+}
+
+/*
+ * LcpSendEchoRequest - Send an echo request frame to the peer
+ */
+static void
+LcpSendEchoRequest (fsm *f)
+{
+  u32_t lcp_magic;
+  u_char pkt[4], *pktp;
+
+  /*
+   * Detect the failure of the peer at this point.
+   */
+  if (lcp_echo_fails != 0) {
+    if (lcp_echos_pending++ >= lcp_echo_fails) {
+      LcpLinkFailure(f);
+      lcp_echos_pending = 0;
+    }
+  }
+
+  /*
+   * Make and send the echo request frame.
+   */
+  if (f->state == LS_OPENED) {
+    lcp_magic = lcp_gotoptions[f->unit].magicnumber;
+    pktp = pkt;
+    PUTLONG(lcp_magic, pktp);
+    fsm_sdata(f, ECHOREQ, (u_char)(lcp_echo_number++ & 0xFF), pkt, (int)(pktp - pkt));
+  }
+}
+
+/*
+ * lcp_echo_lowerup - Start the timer for the LCP frame
+ */
+
+static void
+lcp_echo_lowerup (int unit)
+{
+  fsm *f = &lcp_fsm[unit];
+
+  /* Clear the parameters for generating echo frames */
+  lcp_echos_pending      = 0;
+  lcp_echo_number        = 0;
+  lcp_echo_timer_running = 0;
+
+  /* If a timeout interval is specified then start the timer */
+  if (lcp_echo_interval != 0) {
+    LcpEchoCheck (f);
+  }
+}
+
+/*
+ * lcp_echo_lowerdown - Stop the timer for the LCP frame
+ */
+
+static void
+lcp_echo_lowerdown (int unit)
+{
+  fsm *f = &lcp_fsm[unit];
+
+  if (lcp_echo_timer_running != 0) {
+    UNTIMEOUT (LcpEchoTimeout, f);
+    lcp_echo_timer_running = 0;
+  }
+}
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/lcp.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/lcp.h
new file mode 100644
index 000000000..1a5e5a4c0
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/lcp.h
@@ -0,0 +1,167 @@
+/*****************************************************************************
+* lcp.h - Network Link Control Protocol header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
+*   Original derived from BSD codes.
+*****************************************************************************/
+/*
+ * lcp.h - Link Control Protocol definitions.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: lcp.h,v 1.3 2007/12/19 20:47:23 fbernon Exp $
+ */
+
+#ifndef LCP_H
+#define LCP_H
+
+/*************************
+*** PUBLIC DEFINITIONS ***
+*************************/
+/*
+ * Options.
+ */
+#define CI_MRU           1  /* Maximum Receive Unit */
+#define CI_ASYNCMAP      2  /* Async Control Character Map */
+#define CI_AUTHTYPE      3  /* Authentication Type */
+#define CI_QUALITY       4  /* Quality Protocol */
+#define CI_MAGICNUMBER   5  /* Magic Number */
+#define CI_PCOMPRESSION  7  /* Protocol Field Compression */
+#define CI_ACCOMPRESSION 8  /* Address/Control Field Compression */
+#define CI_CALLBACK      13 /* callback */
+#define CI_MRRU          17 /* max reconstructed receive unit; multilink */
+#define CI_SSNHF         18 /* short sequence numbers for multilink */
+#define CI_EPDISC        19 /* endpoint discriminator */
+
+/*
+ * LCP-specific packet types.
+ */
+#define PROTREJ          8  /* Protocol Reject */
+#define ECHOREQ          9  /* Echo Request */
+#define ECHOREP          10 /* Echo Reply */
+#define DISCREQ          11 /* Discard Request */
+#define CBCP_OPT         6  /* Use callback control protocol */
+
+
+/************************
+*** PUBLIC DATA TYPES ***
+************************/
+
+/*
+ * The state of options is described by an lcp_options structure.
+ */
+typedef struct lcp_options {
+    u_int passive           : 1; /* Don't die if we don't get a response */
+    u_int silent            : 1; /* Wait for the other end to start first */
+    u_int restart           : 1; /* Restart vs. exit after close */
+    u_int neg_mru           : 1; /* Negotiate the MRU? */
+    u_int neg_asyncmap      : 1; /* Negotiate the async map? */
+    u_int neg_upap          : 1; /* Ask for UPAP authentication? */
+    u_int neg_chap          : 1; /* Ask for CHAP authentication? */
+    u_int neg_magicnumber   : 1; /* Ask for magic number? */
+    u_int neg_pcompression  : 1; /* HDLC Protocol Field Compression? */
+    u_int neg_accompression : 1; /* HDLC Address/Control Field Compression? */
+    u_int neg_lqr           : 1; /* Negotiate use of Link Quality Reports */
+    u_int neg_cbcp          : 1; /* Negotiate use of CBCP */
+#ifdef PPP_MULTILINK
+    u_int neg_mrru          : 1; /* Negotiate multilink MRRU */
+    u_int neg_ssnhf         : 1; /* Negotiate short sequence numbers */
+    u_int neg_endpoint      : 1; /* Negotiate endpoint discriminator */
+#endif
+    u_short mru;                 /* Value of MRU */
+#ifdef PPP_MULTILINK
+    u_short mrru;                /* Value of MRRU, and multilink enable */
+#endif
+    u_char chap_mdtype;          /* which MD type (hashing algorithm) */
+    u32_t asyncmap;              /* Value of async map */
+    u32_t magicnumber;
+    int numloops;                /* Number of loops during magic number neg. */
+    u32_t lqr_period;            /* Reporting period for LQR 1/100ths second */
+#ifdef PPP_MULTILINK
+    struct epdisc endpoint;      /* endpoint discriminator */
+#endif
+} lcp_options;
+
+/*
+ * Values for phase from BSD pppd.h based on RFC 1661.
+ */
+typedef enum {
+  PHASE_DEAD = 0,
+  PHASE_INITIALIZE,
+  PHASE_ESTABLISH,
+  PHASE_AUTHENTICATE,
+  PHASE_CALLBACK,
+  PHASE_NETWORK,
+  PHASE_TERMINATE
+} LinkPhase;
+
+
+/*****************************
+*** PUBLIC DATA STRUCTURES ***
+*****************************/
+
+extern LinkPhase lcp_phase[NUM_PPP]; /* Phase of link session (RFC 1661) */
+extern lcp_options lcp_wantoptions[];
+extern lcp_options lcp_gotoptions[];
+extern lcp_options lcp_allowoptions[];
+extern lcp_options lcp_hisoptions[];
+extern ext_accm xmit_accm[];
+
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+
+void lcp_init     (int);
+void lcp_open     (int);
+void lcp_close    (int, char *);
+void lcp_lowerup  (int);
+void lcp_lowerdown(int);
+void lcp_sprotrej (int, u_char *, int); /* send protocol reject */
+
+extern struct protent lcp_protent;
+
+/* Default number of times we receive our magic number from the peer
+   before deciding the link is looped-back. */
+#define DEFLOOPBACKFAIL 10
+
+#endif /* LCP_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/magic.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/magic.c
new file mode 100644
index 000000000..d3922bb56
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/magic.c
@@ -0,0 +1,82 @@
+/*****************************************************************************
+* magic.c - Network Random Number Generator program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-04 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original based on BSD magic.c.
+*****************************************************************************/
+/*
+ * magic.c - PPP Magic Number routines.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT
+
+#include "ppp.h"
+#include "randm.h"
+#include "magic.h"
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ * magicInit - Initialize the magic number generator.
+ *
+ * Since we use another random number generator that has its own
+ * initialization, we do nothing here.
+ */
+void magicInit()
+{
+  return;
+}
+
+/*
+ * magic - Returns the next magic number.
+ */
+u32_t magic()
+{
+  return avRandom();
+}
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/magic.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/magic.h
new file mode 100644
index 000000000..bc5174993
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/magic.h
@@ -0,0 +1,67 @@
+/*****************************************************************************
+* magic.h - Network Random Number Generator header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-04 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
+*   Original derived from BSD codes.
+*****************************************************************************/
+/*
+ * magic.h - PPP Magic Number definitions.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * $Id: magic.h,v 1.2 2007/12/02 22:35:55 fbernon Exp $
+ */
+
+#ifndef MAGIC_H
+#define MAGIC_H
+
+/*****************************************************************************
+************************** PUBLIC FUNCTIONS **********************************
+*****************************************************************************/
+
+/* Initialize the magic number generator */
+void  magicInit(void);
+
+/* Returns the next magic number */
+u32_t magic(void);
+
+#endif /* MAGIC_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/md5.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/md5.c
new file mode 100644
index 000000000..d65ecedbf
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/md5.c
@@ -0,0 +1,318 @@
+/*
+ ***********************************************************************
+ ** md5.c -- the source code for MD5 routines                         **
+ ** RSA Data Security, Inc. MD5 Message-Digest Algorithm              **
+ ** Created: 2/17/90 RLR                                              **
+ ** Revised: 1/91 SRD,AJ,BSK,JT Reference C ver., 7/10 constant corr. **
+ ***********************************************************************
+ */
+
+/*
+ ***********************************************************************
+ ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved.  **
+ **                                                                   **
+ ** License to copy and use this software is granted provided that    **
+ ** it is identified as the "RSA Data Security, Inc. MD5 Message-     **
+ ** Digest Algorithm" in all material mentioning or referencing this  **
+ ** software or this function.                                        **
+ **                                                                   **
+ ** License is also granted to make and use derivative works          **
+ ** provided that such works are identified as "derived from the RSA  **
+ ** Data Security, Inc. MD5 Message-Digest Algorithm" in all          **
+ ** material mentioning or referencing the derived work.              **
+ **                                                                   **
+ ** RSA Data Security, Inc. makes no representations concerning       **
+ ** either the merchantability of this software or the suitability    **
+ ** of this software for any particular purpose.  It is provided "as  **
+ ** is" without express or implied warranty of any kind.              **
+ **                                                                   **
+ ** These notices must be retained in any copies of any part of this  **
+ ** documentation and/or software.                                    **
+ ***********************************************************************
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#if CHAP_SUPPORT || MD5_SUPPORT
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "md5.h"
+
+/*
+ ***********************************************************************
+ **  Message-digest routines:                                         **
+ **  To form the message digest for a message M                       **
+ **    (1) Initialize a context buffer mdContext using MD5Init        **
+ **    (2) Call MD5Update on mdContext and M                          **
+ **    (3) Call MD5Final on mdContext                                 **
+ **  The message digest is now in mdContext->digest[0...15]           **
+ ***********************************************************************
+ */
+
+/* forward declaration */
+static void Transform (u32_t *buf, u32_t *in);
+
+static unsigned char PADDING[64] = {
+  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+/* F, G, H and I are basic MD5 functions */
+#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
+#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
+#define H(x, y, z) ((x) ^ (y) ^ (z))
+#define I(x, y, z) ((y) ^ ((x) | (~z)))
+
+/* ROTATE_LEFT rotates x left n bits */
+#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
+
+/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
+/* Rotation is separate from addition to prevent recomputation */
+#define FF(a, b, c, d, x, s, ac) \
+  {(a) += F ((b), (c), (d)) + (x) + (u32_t)(ac); \
+   (a) = ROTATE_LEFT ((a), (s)); \
+   (a) += (b); \
+  }
+#define GG(a, b, c, d, x, s, ac) \
+  {(a) += G ((b), (c), (d)) + (x) + (u32_t)(ac); \
+   (a) = ROTATE_LEFT ((a), (s)); \
+   (a) += (b); \
+  }
+#define HH(a, b, c, d, x, s, ac) \
+  {(a) += H ((b), (c), (d)) + (x) + (u32_t)(ac); \
+   (a) = ROTATE_LEFT ((a), (s)); \
+   (a) += (b); \
+  }
+#define II(a, b, c, d, x, s, ac) \
+  {(a) += I ((b), (c), (d)) + (x) + (u32_t)(ac); \
+   (a) = ROTATE_LEFT ((a), (s)); \
+   (a) += (b); \
+  }
+
+#ifdef __STDC__
+#define UL(x) x##UL
+#else
+#ifdef WIN32
+#define UL(x) x##UL
+#else
+#define UL(x) x
+#endif
+#endif
+
+/* The routine MD5Init initializes the message-digest context
+   mdContext. All fields are set to zero.
+ */
+void
+MD5Init (MD5_CTX *mdContext)
+{
+  mdContext->i[0] = mdContext->i[1] = (u32_t)0;
+
+  /* Load magic initialization constants. */
+  mdContext->buf[0] = (u32_t)0x67452301UL;
+  mdContext->buf[1] = (u32_t)0xefcdab89UL;
+  mdContext->buf[2] = (u32_t)0x98badcfeUL;
+  mdContext->buf[3] = (u32_t)0x10325476UL;
+}
+
+/* The routine MD5Update updates the message-digest context to
+   account for the presence of each of the characters inBuf[0..inLen-1]
+   in the message whose digest is being computed.
+ */
+void
+MD5Update(MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen)
+{
+  u32_t in[16];
+  int mdi;
+  unsigned int i, ii;
+
+#if 0
+  ppp_trace(LOG_INFO, "MD5Update: %u:%.*H\n", inLen, MIN(inLen, 20) * 2, inBuf);
+  ppp_trace(LOG_INFO, "MD5Update: %u:%s\n", inLen, inBuf);
+#endif
+  
+  /* compute number of bytes mod 64 */
+  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
+
+  /* update number of bits */
+  if ((mdContext->i[0] + ((u32_t)inLen << 3)) < mdContext->i[0]) {
+    mdContext->i[1]++;
+  }
+  mdContext->i[0] += ((u32_t)inLen << 3);
+  mdContext->i[1] += ((u32_t)inLen >> 29);
+
+  while (inLen--) {
+    /* add new character to buffer, increment mdi */
+    mdContext->in[mdi++] = *inBuf++;
+
+    /* transform if necessary */
+    if (mdi == 0x40) {
+      for (i = 0, ii = 0; i < 16; i++, ii += 4) {
+        in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
+                (((u32_t)mdContext->in[ii+2]) << 16) |
+                (((u32_t)mdContext->in[ii+1]) << 8)  |
+                ((u32_t)mdContext->in[ii]);
+      }
+      Transform (mdContext->buf, in);
+      mdi = 0;
+    }
+  }
+}
+
+/* The routine MD5Final terminates the message-digest computation and
+   ends with the desired message digest in mdContext->digest[0...15].
+ */
+void
+MD5Final (unsigned char hash[], MD5_CTX *mdContext)
+{
+  u32_t in[16];
+  int mdi;
+  unsigned int i, ii;
+  unsigned int padLen;
+
+  /* save number of bits */
+  in[14] = mdContext->i[0];
+  in[15] = mdContext->i[1];
+
+  /* compute number of bytes mod 64 */
+  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
+
+  /* pad out to 56 mod 64 */
+  padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
+  MD5Update (mdContext, PADDING, padLen);
+
+  /* append length in bits and transform */
+  for (i = 0, ii = 0; i < 14; i++, ii += 4) {
+    in[i] = (((u32_t)mdContext->in[ii+3]) << 24) |
+            (((u32_t)mdContext->in[ii+2]) << 16) |
+            (((u32_t)mdContext->in[ii+1]) << 8)  |
+            ((u32_t)mdContext->in[ii]);
+  }
+  Transform (mdContext->buf, in);
+
+  /* store buffer in digest */
+  for (i = 0, ii = 0; i < 4; i++, ii += 4) {
+    mdContext->digest[ii]   = (unsigned char)(mdContext->buf[i] & 0xFF);
+    mdContext->digest[ii+1] =
+      (unsigned char)((mdContext->buf[i] >> 8)  & 0xFF);
+    mdContext->digest[ii+2] =
+      (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
+    mdContext->digest[ii+3] =
+      (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
+  }
+  SMEMCPY(hash, mdContext->digest, 16);
+}
+
+/* Basic MD5 step. Transforms buf based on in.
+ */
+static void
+Transform (u32_t *buf, u32_t *in)
+{
+  u32_t a = buf[0], b = buf[1], c = buf[2], d = buf[3];
+
+  /* Round 1 */
+#define S11 7
+#define S12 12
+#define S13 17
+#define S14 22
+  FF ( a, b, c, d, in[ 0], S11, UL(3614090360)); /* 1 */
+  FF ( d, a, b, c, in[ 1], S12, UL(3905402710)); /* 2 */
+  FF ( c, d, a, b, in[ 2], S13, UL( 606105819)); /* 3 */
+  FF ( b, c, d, a, in[ 3], S14, UL(3250441966)); /* 4 */
+  FF ( a, b, c, d, in[ 4], S11, UL(4118548399)); /* 5 */
+  FF ( d, a, b, c, in[ 5], S12, UL(1200080426)); /* 6 */
+  FF ( c, d, a, b, in[ 6], S13, UL(2821735955)); /* 7 */
+  FF ( b, c, d, a, in[ 7], S14, UL(4249261313)); /* 8 */
+  FF ( a, b, c, d, in[ 8], S11, UL(1770035416)); /* 9 */
+  FF ( d, a, b, c, in[ 9], S12, UL(2336552879)); /* 10 */
+  FF ( c, d, a, b, in[10], S13, UL(4294925233)); /* 11 */
+  FF ( b, c, d, a, in[11], S14, UL(2304563134)); /* 12 */
+  FF ( a, b, c, d, in[12], S11, UL(1804603682)); /* 13 */
+  FF ( d, a, b, c, in[13], S12, UL(4254626195)); /* 14 */
+  FF ( c, d, a, b, in[14], S13, UL(2792965006)); /* 15 */
+  FF ( b, c, d, a, in[15], S14, UL(1236535329)); /* 16 */
+
+  /* Round 2 */
+#define S21 5
+#define S22 9
+#define S23 14
+#define S24 20
+  GG ( a, b, c, d, in[ 1], S21, UL(4129170786)); /* 17 */
+  GG ( d, a, b, c, in[ 6], S22, UL(3225465664)); /* 18 */
+  GG ( c, d, a, b, in[11], S23, UL( 643717713)); /* 19 */
+  GG ( b, c, d, a, in[ 0], S24, UL(3921069994)); /* 20 */
+  GG ( a, b, c, d, in[ 5], S21, UL(3593408605)); /* 21 */
+  GG ( d, a, b, c, in[10], S22, UL(  38016083)); /* 22 */
+  GG ( c, d, a, b, in[15], S23, UL(3634488961)); /* 23 */
+  GG ( b, c, d, a, in[ 4], S24, UL(3889429448)); /* 24 */
+  GG ( a, b, c, d, in[ 9], S21, UL( 568446438)); /* 25 */
+  GG ( d, a, b, c, in[14], S22, UL(3275163606)); /* 26 */
+  GG ( c, d, a, b, in[ 3], S23, UL(4107603335)); /* 27 */
+  GG ( b, c, d, a, in[ 8], S24, UL(1163531501)); /* 28 */
+  GG ( a, b, c, d, in[13], S21, UL(2850285829)); /* 29 */
+  GG ( d, a, b, c, in[ 2], S22, UL(4243563512)); /* 30 */
+  GG ( c, d, a, b, in[ 7], S23, UL(1735328473)); /* 31 */
+  GG ( b, c, d, a, in[12], S24, UL(2368359562)); /* 32 */
+
+  /* Round 3 */
+#define S31 4
+#define S32 11
+#define S33 16
+#define S34 23
+  HH ( a, b, c, d, in[ 5], S31, UL(4294588738)); /* 33 */
+  HH ( d, a, b, c, in[ 8], S32, UL(2272392833)); /* 34 */
+  HH ( c, d, a, b, in[11], S33, UL(1839030562)); /* 35 */
+  HH ( b, c, d, a, in[14], S34, UL(4259657740)); /* 36 */
+  HH ( a, b, c, d, in[ 1], S31, UL(2763975236)); /* 37 */
+  HH ( d, a, b, c, in[ 4], S32, UL(1272893353)); /* 38 */
+  HH ( c, d, a, b, in[ 7], S33, UL(4139469664)); /* 39 */
+  HH ( b, c, d, a, in[10], S34, UL(3200236656)); /* 40 */
+  HH ( a, b, c, d, in[13], S31, UL( 681279174)); /* 41 */
+  HH ( d, a, b, c, in[ 0], S32, UL(3936430074)); /* 42 */
+  HH ( c, d, a, b, in[ 3], S33, UL(3572445317)); /* 43 */
+  HH ( b, c, d, a, in[ 6], S34, UL(  76029189)); /* 44 */
+  HH ( a, b, c, d, in[ 9], S31, UL(3654602809)); /* 45 */
+  HH ( d, a, b, c, in[12], S32, UL(3873151461)); /* 46 */
+  HH ( c, d, a, b, in[15], S33, UL( 530742520)); /* 47 */
+  HH ( b, c, d, a, in[ 2], S34, UL(3299628645)); /* 48 */
+
+  /* Round 4 */
+#define S41 6
+#define S42 10
+#define S43 15
+#define S44 21
+  II ( a, b, c, d, in[ 0], S41, UL(4096336452)); /* 49 */
+  II ( d, a, b, c, in[ 7], S42, UL(1126891415)); /* 50 */
+  II ( c, d, a, b, in[14], S43, UL(2878612391)); /* 51 */
+  II ( b, c, d, a, in[ 5], S44, UL(4237533241)); /* 52 */
+  II ( a, b, c, d, in[12], S41, UL(1700485571)); /* 53 */
+  II ( d, a, b, c, in[ 3], S42, UL(2399980690)); /* 54 */
+  II ( c, d, a, b, in[10], S43, UL(4293915773)); /* 55 */
+  II ( b, c, d, a, in[ 1], S44, UL(2240044497)); /* 56 */
+  II ( a, b, c, d, in[ 8], S41, UL(1873313359)); /* 57 */
+  II ( d, a, b, c, in[15], S42, UL(4264355552)); /* 58 */
+  II ( c, d, a, b, in[ 6], S43, UL(2734768916)); /* 59 */
+  II ( b, c, d, a, in[13], S44, UL(1309151649)); /* 60 */
+  II ( a, b, c, d, in[ 4], S41, UL(4149444226)); /* 61 */
+  II ( d, a, b, c, in[11], S42, UL(3174756917)); /* 62 */
+  II ( c, d, a, b, in[ 2], S43, UL( 718787259)); /* 63 */
+  II ( b, c, d, a, in[ 9], S44, UL(3951481745)); /* 64 */
+
+  buf[0] += a;
+  buf[1] += b;
+  buf[2] += c;
+  buf[3] += d;
+}
+
+#endif /* CHAP_SUPPORT || MD5_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/md5.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/md5.h
new file mode 100644
index 000000000..e129533f3
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/md5.h
@@ -0,0 +1,55 @@
+/*
+ ***********************************************************************
+ ** md5.h -- header file for implementation of MD5                    **
+ ** RSA Data Security, Inc. MD5 Message-Digest Algorithm              **
+ ** Created: 2/17/90 RLR                                              **
+ ** Revised: 12/27/90 SRD,AJ,BSK,JT Reference C version               **
+ ** Revised (for MD5): RLR 4/27/91                                    **
+ **   -- G modified to have y&~z instead of y&z                       **
+ **   -- FF, GG, HH modified to add in last register done             **
+ **   -- Access pattern: round 2 works mod 5, round 3 works mod 3     **
+ **   -- distinct additive constant for each step                     **
+ **   -- round 4 added, working mod 7                                 **
+ ***********************************************************************
+ */
+
+/*
+ ***********************************************************************
+ ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved.  **
+ **                                                                   **
+ ** License to copy and use this software is granted provided that    **
+ ** it is identified as the "RSA Data Security, Inc. MD5 Message-     **
+ ** Digest Algorithm" in all material mentioning or referencing this  **
+ ** software or this function.                                        **
+ **                                                                   **
+ ** License is also granted to make and use derivative works          **
+ ** provided that such works are identified as "derived from the RSA  **
+ ** Data Security, Inc. MD5 Message-Digest Algorithm" in all          **
+ ** material mentioning or referencing the derived work.              **
+ **                                                                   **
+ ** RSA Data Security, Inc. makes no representations concerning       **
+ ** either the merchantability of this software or the suitability    **
+ ** of this software for any particular purpose.  It is provided "as  **
+ ** is" without express or implied warranty of any kind.              **
+ **                                                                   **
+ ** These notices must be retained in any copies of any part of this  **
+ ** documentation and/or software.                                    **
+ ***********************************************************************
+ */
+
+#ifndef MD5_H
+#define MD5_H
+
+/* Data structure for MD5 (Message-Digest) computation */
+typedef struct {
+  u32_t i[2];               /* number of _bits_ handled mod 2^64 */
+  u32_t buf[4];             /* scratch buffer */
+  unsigned char in[64];     /* input buffer */
+  unsigned char digest[16]; /* actual digest after MD5Final call */
+} MD5_CTX;
+
+void MD5Init  ( MD5_CTX *mdContext);
+void MD5Update( MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen);
+void MD5Final ( unsigned char hash[], MD5_CTX *mdContext);
+
+#endif /* MD5_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pap.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pap.c
new file mode 100644
index 000000000..7c3fd7e4c
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pap.c
@@ -0,0 +1,619 @@
+/*****************************************************************************
+* pap.c - Network Password Authentication Protocol program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-12 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original.
+*****************************************************************************/
+/*
+ * upap.c - User/Password Authentication Protocol.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#if PAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "auth.h"
+#include "pap.h"
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+/*
+ * Protocol entry points.
+ */
+static void upap_init      (int);
+static void upap_lowerup   (int);
+static void upap_lowerdown (int);
+static void upap_input     (int, u_char *, int);
+static void upap_protrej   (int);
+
+static void upap_timeout   (void *);
+static void upap_reqtimeout(void *);
+static void upap_rauthreq  (upap_state *, u_char *, int, int);
+static void upap_rauthack  (upap_state *, u_char *, int, int);
+static void upap_rauthnak  (upap_state *, u_char *, int, int);
+static void upap_sauthreq  (upap_state *);
+static void upap_sresp     (upap_state *, u_char, u_char, char *, int);
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+struct protent pap_protent = {
+  PPP_PAP,
+  upap_init,
+  upap_input,
+  upap_protrej,
+  upap_lowerup,
+  upap_lowerdown,
+  NULL,
+  NULL,
+#if 0
+  upap_printpkt,
+  NULL,
+#endif
+  1,
+  "PAP",
+#if 0
+  NULL,
+  NULL,
+  NULL
+#endif
+};
+
+upap_state upap[NUM_PPP]; /* UPAP state; one for each unit */
+
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ *  Set the default login name and password for the pap sessions
+ */
+void
+upap_setloginpasswd(int unit, const char *luser, const char *lpassword)
+{
+  upap_state *u = &upap[unit];
+  
+  /* Save the username and password we're given */
+  u->us_user = luser;
+  u->us_userlen = strlen(luser);
+  u->us_passwd = lpassword;
+  u->us_passwdlen = strlen(lpassword);
+}
+
+
+/*
+ * upap_authwithpeer - Authenticate us with our peer (start client).
+ *
+ * Set new state and send authenticate's.
+ */
+void
+upap_authwithpeer(int unit, char *user, char *password)
+{
+  upap_state *u = &upap[unit];
+
+  UPAPDEBUG((LOG_INFO, "upap_authwithpeer: %d user=%s password=%s s=%d\n",
+             unit, user, password, u->us_clientstate));
+
+  upap_setloginpasswd(unit, user, password);
+
+  u->us_transmits = 0;
+
+  /* Lower layer up yet? */
+  if (u->us_clientstate == UPAPCS_INITIAL ||
+      u->us_clientstate == UPAPCS_PENDING) {
+    u->us_clientstate = UPAPCS_PENDING;
+    return;
+  }
+
+  upap_sauthreq(u);      /* Start protocol */
+}
+
+
+/*
+ * upap_authpeer - Authenticate our peer (start server).
+ *
+ * Set new state.
+ */
+void
+upap_authpeer(int unit)
+{
+  upap_state *u = &upap[unit];
+
+  /* Lower layer up yet? */
+  if (u->us_serverstate == UPAPSS_INITIAL ||
+      u->us_serverstate == UPAPSS_PENDING) {
+    u->us_serverstate = UPAPSS_PENDING;
+    return;
+  }
+
+  u->us_serverstate = UPAPSS_LISTEN;
+  if (u->us_reqtimeout > 0) {
+    TIMEOUT(upap_reqtimeout, u, u->us_reqtimeout);
+  }
+}
+
+
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+/*
+ * upap_init - Initialize a UPAP unit.
+ */
+static void
+upap_init(int unit)
+{
+  upap_state *u = &upap[unit];
+
+  UPAPDEBUG((LOG_INFO, "upap_init: %d\n", unit));
+  u->us_unit         = unit;
+  u->us_user         = NULL;
+  u->us_userlen      = 0;
+  u->us_passwd       = NULL;
+  u->us_passwdlen    = 0;
+  u->us_clientstate  = UPAPCS_INITIAL;
+  u->us_serverstate  = UPAPSS_INITIAL;
+  u->us_id           = 0;
+  u->us_timeouttime  = UPAP_DEFTIMEOUT;
+  u->us_maxtransmits = 10;
+  u->us_reqtimeout   = UPAP_DEFREQTIME;
+}
+
+/*
+ * upap_timeout - Retransmission timer for sending auth-reqs expired.
+ */
+static void
+upap_timeout(void *arg)
+{
+  upap_state *u = (upap_state *) arg;
+
+  UPAPDEBUG((LOG_INFO, "upap_timeout: %d timeout %d expired s=%d\n", 
+        u->us_unit, u->us_timeouttime, u->us_clientstate));
+
+  if (u->us_clientstate != UPAPCS_AUTHREQ) {
+    return;
+  }
+
+  if (u->us_transmits >= u->us_maxtransmits) {
+    /* give up in disgust */
+    UPAPDEBUG((LOG_ERR, "No response to PAP authenticate-requests\n"));
+    u->us_clientstate = UPAPCS_BADAUTH;
+    auth_withpeer_fail(u->us_unit, PPP_PAP);
+    return;
+  }
+
+  upap_sauthreq(u);    /* Send Authenticate-Request */
+}
+
+
+/*
+ * upap_reqtimeout - Give up waiting for the peer to send an auth-req.
+ */
+static void
+upap_reqtimeout(void *arg)
+{
+  upap_state *u = (upap_state *) arg;
+
+  if (u->us_serverstate != UPAPSS_LISTEN) {
+    return; /* huh?? */
+  }
+
+  auth_peer_fail(u->us_unit, PPP_PAP);
+  u->us_serverstate = UPAPSS_BADAUTH;
+}
+
+
+/*
+ * upap_lowerup - The lower layer is up.
+ *
+ * Start authenticating if pending.
+ */
+static void
+upap_lowerup(int unit)
+{
+  upap_state *u = &upap[unit];
+
+  UPAPDEBUG((LOG_INFO, "upap_lowerup: %d s=%d\n", unit, u->us_clientstate));
+
+  if (u->us_clientstate == UPAPCS_INITIAL) {
+    u->us_clientstate = UPAPCS_CLOSED;
+  } else if (u->us_clientstate == UPAPCS_PENDING) {
+    upap_sauthreq(u);  /* send an auth-request */
+  }
+
+  if (u->us_serverstate == UPAPSS_INITIAL) {
+    u->us_serverstate = UPAPSS_CLOSED;
+  } else if (u->us_serverstate == UPAPSS_PENDING) {
+    u->us_serverstate = UPAPSS_LISTEN;
+    if (u->us_reqtimeout > 0) {
+      TIMEOUT(upap_reqtimeout, u, u->us_reqtimeout);
+    }
+  }
+}
+
+
+/*
+ * upap_lowerdown - The lower layer is down.
+ *
+ * Cancel all timeouts.
+ */
+static void
+upap_lowerdown(int unit)
+{
+  upap_state *u = &upap[unit];
+
+  UPAPDEBUG((LOG_INFO, "upap_lowerdown: %d s=%d\n", unit, u->us_clientstate));
+
+  if (u->us_clientstate == UPAPCS_AUTHREQ) { /* Timeout pending? */
+    UNTIMEOUT(upap_timeout, u);    /* Cancel timeout */
+  }
+  if (u->us_serverstate == UPAPSS_LISTEN && u->us_reqtimeout > 0) {
+    UNTIMEOUT(upap_reqtimeout, u);
+  }
+
+  u->us_clientstate = UPAPCS_INITIAL;
+  u->us_serverstate = UPAPSS_INITIAL;
+}
+
+
+/*
+ * upap_protrej - Peer doesn't speak this protocol.
+ *
+ * This shouldn't happen.  In any case, pretend lower layer went down.
+ */
+static void
+upap_protrej(int unit)
+{
+  upap_state *u = &upap[unit];
+
+  if (u->us_clientstate == UPAPCS_AUTHREQ) {
+    UPAPDEBUG((LOG_ERR, "PAP authentication failed due to protocol-reject\n"));
+    auth_withpeer_fail(unit, PPP_PAP);
+  }
+  if (u->us_serverstate == UPAPSS_LISTEN) {
+    UPAPDEBUG((LOG_ERR, "PAP authentication of peer failed (protocol-reject)\n"));
+    auth_peer_fail(unit, PPP_PAP);
+  }
+  upap_lowerdown(unit);
+}
+
+
+/*
+ * upap_input - Input UPAP packet.
+ */
+static void
+upap_input(int unit, u_char *inpacket, int l)
+{
+  upap_state *u = &upap[unit];
+  u_char *inp;
+  u_char code, id;
+  int len;
+
+  /*
+   * Parse header (code, id and length).
+   * If packet too short, drop it.
+   */
+  inp = inpacket;
+  if (l < UPAP_HEADERLEN) {
+    UPAPDEBUG((LOG_INFO, "pap_input: rcvd short header.\n"));
+    return;
+  }
+  GETCHAR(code, inp);
+  GETCHAR(id, inp);
+  GETSHORT(len, inp);
+  if (len < UPAP_HEADERLEN) {
+    UPAPDEBUG((LOG_INFO, "pap_input: rcvd illegal length.\n"));
+    return;
+  }
+  if (len > l) {
+    UPAPDEBUG((LOG_INFO, "pap_input: rcvd short packet.\n"));
+    return;
+  }
+  len -= UPAP_HEADERLEN;
+
+  /*
+   * Action depends on code.
+   */
+  switch (code) {
+    case UPAP_AUTHREQ:
+      upap_rauthreq(u, inp, id, len);
+      break;
+
+    case UPAP_AUTHACK:
+      upap_rauthack(u, inp, id, len);
+      break;
+
+    case UPAP_AUTHNAK:
+      upap_rauthnak(u, inp, id, len);
+      break;
+
+    default:        /* XXX Need code reject */
+      break;
+  }
+}
+
+
+/*
+ * upap_rauth - Receive Authenticate.
+ */
+static void
+upap_rauthreq(upap_state *u, u_char *inp, int id, int len)
+{
+  u_char ruserlen, rpasswdlen;
+  char *ruser, *rpasswd;
+  int retcode;
+  char *msg;
+  int msglen;
+
+  UPAPDEBUG((LOG_INFO, "pap_rauth: Rcvd id %d.\n", id));
+
+  if (u->us_serverstate < UPAPSS_LISTEN) {
+    return;
+  }
+
+  /*
+   * If we receive a duplicate authenticate-request, we are
+   * supposed to return the same status as for the first request.
+   */
+  if (u->us_serverstate == UPAPSS_OPEN) {
+    upap_sresp(u, UPAP_AUTHACK, id, "", 0);  /* return auth-ack */
+    return;
+  }
+  if (u->us_serverstate == UPAPSS_BADAUTH) {
+    upap_sresp(u, UPAP_AUTHNAK, id, "", 0);  /* return auth-nak */
+    return;
+  }
+
+  /*
+   * Parse user/passwd.
+   */
+  if (len < sizeof (u_char)) {
+    UPAPDEBUG((LOG_INFO, "pap_rauth: rcvd short packet.\n"));
+    return;
+  }
+  GETCHAR(ruserlen, inp);
+  len -= sizeof (u_char) + ruserlen + sizeof (u_char);
+  if (len < 0) {
+    UPAPDEBUG((LOG_INFO, "pap_rauth: rcvd short packet.\n"));
+    return;
+  }
+  ruser = (char *) inp;
+  INCPTR(ruserlen, inp);
+  GETCHAR(rpasswdlen, inp);
+  if (len < rpasswdlen) {
+    UPAPDEBUG((LOG_INFO, "pap_rauth: rcvd short packet.\n"));
+    return;
+  }
+  rpasswd = (char *) inp;
+
+  /*
+   * Check the username and password given.
+   */
+  retcode = check_passwd(u->us_unit, ruser, ruserlen, rpasswd, rpasswdlen, &msg, &msglen);
+  BZERO(rpasswd, rpasswdlen);
+
+  upap_sresp(u, retcode, id, msg, msglen);
+
+  if (retcode == UPAP_AUTHACK) {
+    u->us_serverstate = UPAPSS_OPEN;
+    auth_peer_success(u->us_unit, PPP_PAP, ruser, ruserlen);
+  } else {
+    u->us_serverstate = UPAPSS_BADAUTH;
+    auth_peer_fail(u->us_unit, PPP_PAP);
+  }
+
+  if (u->us_reqtimeout > 0) {
+    UNTIMEOUT(upap_reqtimeout, u);
+  }
+}
+
+
+/*
+ * upap_rauthack - Receive Authenticate-Ack.
+ */
+static void
+upap_rauthack(upap_state *u, u_char *inp, int id, int len)
+{
+  u_char msglen;
+  char *msg;
+
+  LWIP_UNUSED_ARG(id);
+
+  UPAPDEBUG((LOG_INFO, "pap_rauthack: Rcvd id %d s=%d\n", id, u->us_clientstate));
+
+  if (u->us_clientstate != UPAPCS_AUTHREQ) { /* XXX */
+    return;
+  }
+
+  /*
+   * Parse message.
+   */
+  if (len < sizeof (u_char)) {
+    UPAPDEBUG((LOG_INFO, "pap_rauthack: rcvd short packet.\n"));
+    return;
+  }
+  GETCHAR(msglen, inp);
+  len -= sizeof (u_char);
+  if (len < msglen) {
+    UPAPDEBUG((LOG_INFO, "pap_rauthack: rcvd short packet.\n"));
+    return;
+  }
+  msg = (char *) inp;
+  PRINTMSG(msg, msglen);
+
+  u->us_clientstate = UPAPCS_OPEN;
+
+  auth_withpeer_success(u->us_unit, PPP_PAP);
+}
+
+
+/*
+ * upap_rauthnak - Receive Authenticate-Nakk.
+ */
+static void
+upap_rauthnak(upap_state *u, u_char *inp, int id, int len)
+{
+  u_char msglen;
+  char *msg;
+
+  LWIP_UNUSED_ARG(id);
+
+  UPAPDEBUG((LOG_INFO, "pap_rauthnak: Rcvd id %d s=%d\n", id, u->us_clientstate));
+
+  if (u->us_clientstate != UPAPCS_AUTHREQ) { /* XXX */
+    return;
+  }
+
+  /*
+   * Parse message.
+   */
+  if (len < sizeof (u_char)) {
+    UPAPDEBUG((LOG_INFO, "pap_rauthnak: rcvd short packet.\n"));
+  } else {
+    GETCHAR(msglen, inp);
+    if(msglen > 0) {
+      len -= sizeof (u_char);
+      if (len < msglen) {
+        UPAPDEBUG((LOG_INFO, "pap_rauthnak: rcvd short packet.\n"));
+        return;
+      }
+      msg = (char *) inp;
+      PRINTMSG(msg, msglen);
+    }
+  }
+
+  u->us_clientstate = UPAPCS_BADAUTH;
+
+  UPAPDEBUG((LOG_ERR, "PAP authentication failed\n"));
+  auth_withpeer_fail(u->us_unit, PPP_PAP);
+}
+
+
+/*
+ * upap_sauthreq - Send an Authenticate-Request.
+ */
+static void
+upap_sauthreq(upap_state *u)
+{
+  u_char *outp;
+  int outlen;
+
+  outlen = UPAP_HEADERLEN + 2 * sizeof (u_char) 
+         + u->us_userlen + u->us_passwdlen;
+  outp = outpacket_buf[u->us_unit];
+
+  MAKEHEADER(outp, PPP_PAP);
+
+  PUTCHAR(UPAP_AUTHREQ, outp);
+  PUTCHAR(++u->us_id, outp);
+  PUTSHORT(outlen, outp);
+  PUTCHAR(u->us_userlen, outp);
+  BCOPY(u->us_user, outp, u->us_userlen);
+  INCPTR(u->us_userlen, outp);
+  PUTCHAR(u->us_passwdlen, outp);
+  BCOPY(u->us_passwd, outp, u->us_passwdlen);
+
+  pppWrite(u->us_unit, outpacket_buf[u->us_unit], outlen + PPP_HDRLEN);
+
+  UPAPDEBUG((LOG_INFO, "pap_sauth: Sent id %d\n", u->us_id));
+
+  TIMEOUT(upap_timeout, u, u->us_timeouttime);
+  ++u->us_transmits;
+  u->us_clientstate = UPAPCS_AUTHREQ;
+}
+
+
+/*
+ * upap_sresp - Send a response (ack or nak).
+ */
+static void
+upap_sresp(upap_state *u, u_char code, u_char id, char *msg, int msglen)
+{
+  u_char *outp;
+  int outlen;
+
+  outlen = UPAP_HEADERLEN + sizeof (u_char) + msglen;
+  outp = outpacket_buf[u->us_unit];
+  MAKEHEADER(outp, PPP_PAP);
+
+  PUTCHAR(code, outp);
+  PUTCHAR(id, outp);
+  PUTSHORT(outlen, outp);
+  PUTCHAR(msglen, outp);
+  BCOPY(msg, outp, msglen);
+  pppWrite(u->us_unit, outpacket_buf[u->us_unit], outlen + PPP_HDRLEN);
+
+  UPAPDEBUG((LOG_INFO, "pap_sresp: Sent code %d, id %d s=%d\n", code, id, u->us_clientstate));
+}
+
+#if 0
+/*
+ * upap_printpkt - print the contents of a PAP packet.
+ */
+static int upap_printpkt(
+  u_char *p,
+  int plen,
+  void (*printer) (void *, char *, ...),
+  void *arg
+)
+{
+  LWIP_UNUSED_ARG(p);
+  LWIP_UNUSED_ARG(plen);
+  LWIP_UNUSED_ARG(printer);
+  LWIP_UNUSED_ARG(arg);
+  return 0;
+}
+#endif /* 0 */
+
+#endif /* PAP_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pap.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pap.h
new file mode 100644
index 000000000..0a09fc841
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pap.h
@@ -0,0 +1,131 @@
+/*****************************************************************************
+* pap.h -  PPP Password Authentication Protocol header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-12-04 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
+*   Original derived from BSD codes.
+*****************************************************************************/
+/*
+ * upap.h - User/Password Authentication Protocol definitions.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef PAP_H
+#define PAP_H
+
+#if PAP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+/*************************
+*** PUBLIC DEFINITIONS ***
+*************************/
+/*
+ * Packet header = Code, id, length.
+ */
+#define UPAP_HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short))
+
+
+/*
+ * UPAP codes.
+ */
+#define UPAP_AUTHREQ 1 /* Authenticate-Request */
+#define UPAP_AUTHACK 2 /* Authenticate-Ack */
+#define UPAP_AUTHNAK 3 /* Authenticate-Nak */
+
+/*
+ * Client states.
+ */
+#define UPAPCS_INITIAL 0 /* Connection down */
+#define UPAPCS_CLOSED  1 /* Connection up, haven't requested auth */
+#define UPAPCS_PENDING 2 /* Connection down, have requested auth */
+#define UPAPCS_AUTHREQ 3 /* We've sent an Authenticate-Request */
+#define UPAPCS_OPEN    4 /* We've received an Ack */
+#define UPAPCS_BADAUTH 5 /* We've received a Nak */
+
+/*
+ * Server states.
+ */
+#define UPAPSS_INITIAL 0 /* Connection down */
+#define UPAPSS_CLOSED  1 /* Connection up, haven't requested auth */
+#define UPAPSS_PENDING 2 /* Connection down, have requested auth */
+#define UPAPSS_LISTEN  3 /* Listening for an Authenticate */
+#define UPAPSS_OPEN    4 /* We've sent an Ack */
+#define UPAPSS_BADAUTH 5 /* We've sent a Nak */
+
+
+/************************
+*** PUBLIC DATA TYPES ***
+************************/
+
+/*
+ * Each interface is described by upap structure.
+ */
+typedef struct upap_state {
+  int us_unit;           /* Interface unit number */
+  const char *us_user;   /* User */
+  int us_userlen;        /* User length */
+  const char *us_passwd; /* Password */
+  int us_passwdlen;      /* Password length */
+  int us_clientstate;    /* Client state */
+  int us_serverstate;    /* Server state */
+  u_char us_id;          /* Current id */
+  int us_timeouttime;    /* Timeout (seconds) for auth-req retrans. */
+  int us_transmits;      /* Number of auth-reqs sent */
+  int us_maxtransmits;   /* Maximum number of auth-reqs to send */
+  int us_reqtimeout;     /* Time to wait for auth-req from peer */
+} upap_state;
+
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+
+extern upap_state upap[];
+
+void upap_setloginpasswd(int unit, const char *luser, const char *lpassword);
+void upap_authwithpeer  (int, char *, char *);
+void upap_authpeer      (int);
+
+extern struct protent pap_protent;
+
+#endif /* PAP_SUPPORT */
+
+#endif /* PAP_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp.c
new file mode 100644
index 000000000..8720c3368
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp.c
@@ -0,0 +1,1999 @@
+/*****************************************************************************
+* ppp.c - Network Point to Point Protocol program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-11-05 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original.
+*****************************************************************************/
+
+/*
+ * ppp_defs.h - PPP definitions.
+ *
+ * if_pppvar.h - private structures and declarations for PPP.
+ *
+ * Copyright (c) 1994 The Australian National University.
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation is hereby granted, provided that the above copyright
+ * notice appears in all copies.  This software is provided without any
+ * warranty, express or implied. The Australian National University
+ * makes no representations about the suitability of this software for
+ * any purpose.
+ *
+ * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
+ * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
+ * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
+ * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
+ * OR MODIFICATIONS.
+ */
+
+/*
+ * if_ppp.h - Point-to-Point Protocol definitions.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/ip.h" /* for ip_input() */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "randm.h"
+#include "fsm.h"
+#if PAP_SUPPORT
+#include "pap.h"
+#endif /* PAP_SUPPORT */
+#if CHAP_SUPPORT
+#include "chap.h"
+#endif /* CHAP_SUPPORT */
+#include "ipcp.h"
+#include "lcp.h"
+#include "magic.h"
+#include "auth.h"
+#if VJ_SUPPORT
+#include "vj.h"
+#endif /* VJ_SUPPORT */
+#if PPPOE_SUPPORT
+#include "netif/ppp_oe.h"
+#endif /* PPPOE_SUPPORT */
+
+#include <string.h>
+
+/*************************/
+/*** LOCAL DEFINITIONS ***/
+/*************************/
+
+/*
+ * The basic PPP frame.
+ */
+#define PPP_ADDRESS(p)  (((u_char *)(p))[0])
+#define PPP_CONTROL(p)  (((u_char *)(p))[1])
+#define PPP_PROTOCOL(p) ((((u_char *)(p))[2] << 8) + ((u_char *)(p))[3])
+
+/* PPP packet parser states.  Current state indicates operation yet to be
+ * completed. */
+typedef enum {
+  PDIDLE = 0,  /* Idle state - waiting. */
+  PDSTART,     /* Process start flag. */
+  PDADDRESS,   /* Process address field. */
+  PDCONTROL,   /* Process control field. */
+  PDPROTOCOL1, /* Process protocol field 1. */
+  PDPROTOCOL2, /* Process protocol field 2. */
+  PDDATA       /* Process data byte. */
+} PPPDevStates;
+
+#define ESCAPE_P(accm, c) ((accm)[(c) >> 3] & pppACCMMask[c & 0x07])
+
+/************************/
+/*** LOCAL DATA TYPES ***/
+/************************/
+/*
+ * PPP interface control block.
+ */
+typedef struct PPPControl_s {
+  char openFlag;                /* True when in use. */
+#if PPPOE_SUPPORT
+  struct netif *ethif;
+  struct pppoe_softc *pppoe_sc;
+#endif /* PPPOE_SUPPORT */
+  int  if_up;                   /* True when the interface is up. */
+  int  errCode;                 /* Code indicating why interface is down. */
+#if PPPOS_SUPPORT
+  sio_fd_t fd;                  /* File device ID of port. */
+  int  kill_link;               /* Shut the link down. */
+  int  sig_hup;                 /* Carrier lost. */
+  struct pbuf *inHead, *inTail; /* The input packet. */
+  PPPDevStates inState;         /* The input process state. */
+  char inEscaped;               /* Escape next character. */
+  u16_t inProtocol;             /* The input protocol code. */
+  u16_t inFCS;                  /* Input Frame Check Sequence value. */
+#endif /* PPPOS_SUPPORT */
+  int  mtu;                     /* Peer's mru */
+  int  pcomp;                   /* Does peer accept protocol compression? */
+  int  accomp;                  /* Does peer accept addr/ctl compression? */
+  u_long lastXMit;              /* Time of last transmission. */
+  ext_accm inACCM;              /* Async-Ctl-Char-Map for input. */
+  ext_accm outACCM;             /* Async-Ctl-Char-Map for output. */
+#if PPPOS_SUPPORT && VJ_SUPPORT
+  int  vjEnabled;               /* Flag indicating VJ compression enabled. */
+  struct vjcompress vjComp;     /* Van Jabobsen compression header. */
+#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
+
+  struct netif netif;
+
+  struct ppp_addrs addrs;
+
+  void (*linkStatusCB)(void *ctx, int errCode, void *arg);
+  void *linkStatusCtx;
+
+} PPPControl;
+
+
+/*
+ * Ioctl definitions.
+ */
+
+struct npioctl {
+  int         protocol; /* PPP procotol, e.g. PPP_IP */
+  enum NPmode mode;
+};
+
+
+
+/***********************************/
+/*** LOCAL FUNCTION DECLARATIONS ***/
+/***********************************/
+#if PPPOS_SUPPORT
+static void pppMain(void *pd);
+static void pppDrop(PPPControl *pc);
+static void pppInProc(int pd, u_char *s, int l);
+#endif /* PPPOS_SUPPORT */
+
+
+/******************************/
+/*** PUBLIC DATA STRUCTURES ***/
+/******************************/
+u_long subnetMask;
+
+static PPPControl pppControl[NUM_PPP]; /* The PPP interface control blocks. */
+
+/*
+ * PPP Data Link Layer "protocol" table.
+ * One entry per supported protocol.
+ * The last entry must be NULL.
+ */
+struct protent *ppp_protocols[] = {
+  &lcp_protent,
+#if PAP_SUPPORT
+  &pap_protent,
+#endif /* PAP_SUPPORT */
+#if CHAP_SUPPORT
+  &chap_protent,
+#endif /* CHAP_SUPPORT */
+#if CBCP_SUPPORT
+  &cbcp_protent,
+#endif /* CBCP_SUPPORT */
+  &ipcp_protent,
+#if CCP_SUPPORT
+  &ccp_protent,
+#endif /* CCP_SUPPORT */
+  NULL
+};
+
+
+/*
+ * Buffers for outgoing packets.  This must be accessed only from the appropriate
+ * PPP task so that it doesn't need to be protected to avoid collisions.
+ */
+u_char *outpacket_buf[NUM_PPP];  
+
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+
+#if PPPOS_SUPPORT
+/*
+ * FCS lookup table as calculated by genfcstab.
+ */
+static const u_short fcstab[256] = {
+  0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
+  0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
+  0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
+  0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
+  0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
+  0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
+  0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
+  0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
+  0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
+  0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
+  0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
+  0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
+  0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
+  0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
+  0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
+  0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
+  0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
+  0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
+  0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
+  0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
+  0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
+  0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
+  0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
+  0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
+  0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
+  0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
+  0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
+  0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
+  0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
+  0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
+  0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
+  0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
+};
+
+/* PPP's Asynchronous-Control-Character-Map.  The mask array is used
+ * to select the specific bit for a character. */
+static u_char pppACCMMask[] = {
+  0x01,
+  0x02,
+  0x04,
+  0x08,
+  0x10,
+  0x20,
+  0x40,
+  0x80
+};
+
+
+void
+pppMainWakeup(int pd)
+{
+  PPPDEBUG((LOG_DEBUG, "pppMainWakeup: unit %d\n", pd));
+  sio_read_abort(pppControl[pd].fd);
+}
+#endif /* PPPOS_SUPPORT */
+
+void
+pppLinkTerminated(int pd)
+{
+  PPPControl *pc = &pppControl[pd];
+
+  PPPDEBUG((LOG_DEBUG, "pppLinkTerminated: unit %d\n", pd));
+
+#if PPPOE_SUPPORT
+  if(pc->ethif) {
+    pppoe_disconnect(pc->pppoe_sc);
+  } else
+#endif /* PPPOE_SUPPORT */
+  {
+#if PPPOS_SUPPORT
+    pppMainWakeup(pd);
+#endif /* PPPOS_SUPPORT */
+  }
+}
+
+void
+pppLinkDown(int pd)
+{
+  PPPControl *pc = &pppControl[pd];
+
+  PPPDEBUG((LOG_DEBUG, "pppLinkDown: unit %d\n", pd));
+
+#if PPPOE_SUPPORT
+  if(pc->ethif) {
+    pppoe_disconnect(pc->pppoe_sc);
+  } else
+#endif /* PPPOE_SUPPORT */
+  {
+#if PPPOS_SUPPORT
+    pppMainWakeup(pd);
+#endif /* PPPOS_SUPPORT */
+  }
+}
+
+/* these callbacks are necessary because lcp_* functions
+   must be called in the same context as pppInput(),
+   namely the tcpip_thread(), essentially because
+   they manipulate timeouts which are thread-private
+*/
+
+static void
+pppStartCB(void *arg)
+{
+  int pd = (int)arg;
+
+  PPPDEBUG((LOG_DEBUG, "pppStartCB: unit %d\n", pd));
+  lcp_lowerup(pd);
+  lcp_open(pd); /* Start protocol */
+}
+
+static void
+pppStopCB(void *arg)
+{
+  int pd = (int)arg;
+
+  PPPDEBUG((LOG_DEBUG, "pppStopCB: unit %d\n", pd));
+  lcp_close(pd, "User request");
+}
+
+static void
+pppHupCB(void *arg)
+{
+  int pd = (int)arg;
+
+  PPPDEBUG((LOG_DEBUG, "pppHupCB: unit %d\n", pd));
+  lcp_lowerdown(pd);
+  link_terminated(pd);
+}
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/* Initialize the PPP subsystem. */
+
+struct ppp_settings ppp_settings;
+
+err_t
+pppInit(void)
+{
+  struct protent *protp;
+  int i, j;
+
+  memset(&ppp_settings, 0, sizeof(ppp_settings));
+  ppp_settings.usepeerdns = 1;
+  pppSetAuth(PPPAUTHTYPE_NONE, NULL, NULL);
+
+  magicInit();
+
+  for (i = 0; i < NUM_PPP; i++) {
+    pppControl[i].openFlag = 0;
+
+    subnetMask = htonl(0xffffff00);
+
+    outpacket_buf[i] = (u_char *)mem_malloc(PPP_MRU+PPP_HDRLEN);
+    if(!outpacket_buf[i]) {
+      return ERR_MEM;
+    }
+
+    /*
+     * Initialize to the standard option set.
+     */
+    for (j = 0; (protp = ppp_protocols[j]) != NULL; ++j) {
+      (*protp->init)(i);
+    }
+  }
+
+#if LINK_STATS
+  /** @todo already done in stats_init (in fact, zeroed at boot). So, remove it? */
+  /* Clear the statistics. */
+  memset(&lwip_stats.link, 0, sizeof(lwip_stats.link));
+#endif /* LINK_STATS */
+
+#if PPPOE_SUPPORT
+  pppoe_init();
+#endif /* PPPOE_SUPPORT */
+
+  return ERR_OK;
+}
+
+void
+pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd)
+{
+  switch(authType) {
+    case PPPAUTHTYPE_NONE:
+    default:
+#ifdef LWIP_PPP_STRICT_PAP_REJECT
+      ppp_settings.refuse_pap = 1;
+#else  /* LWIP_PPP_STRICT_PAP_REJECT */
+      /* some providers request pap and accept an empty login/pw */
+      ppp_settings.refuse_pap = 0;
+#endif /* LWIP_PPP_STRICT_PAP_REJECT */
+      ppp_settings.refuse_chap = 1;
+      break;
+
+    case PPPAUTHTYPE_ANY:
+      /* Warning: Using PPPAUTHTYPE_ANY might have security consequences.
+       * RFC 1994 says:
+       *
+       * In practice, within or associated with each PPP server, there is a
+       * database which associates "user" names with authentication
+       * information ("secrets").  It is not anticipated that a particular
+       * named user would be authenticated by multiple methods.  This would
+       * make the user vulnerable to attacks which negotiate the least secure
+       * method from among a set (such as PAP rather than CHAP).  If the same
+       * secret was used, PAP would reveal the secret to be used later with
+       * CHAP.
+       *
+       * Instead, for each user name there should be an indication of exactly
+       * one method used to authenticate that user name.  If a user needs to
+       * make use of different authentication methods under different
+       * circumstances, then distinct user names SHOULD be employed, each of
+       * which identifies exactly one authentication method.
+       *
+       */
+      ppp_settings.refuse_pap = 0;
+      ppp_settings.refuse_chap = 0;
+      break;
+
+    case PPPAUTHTYPE_PAP:
+      ppp_settings.refuse_pap = 0;
+      ppp_settings.refuse_chap = 1;
+      break;
+
+    case PPPAUTHTYPE_CHAP:
+      ppp_settings.refuse_pap = 1;
+      ppp_settings.refuse_chap = 0;
+      break;
+  }
+
+  if(user) {
+    strncpy(ppp_settings.user, user, sizeof(ppp_settings.user)-1);
+    ppp_settings.user[sizeof(ppp_settings.user)-1] = '\0';
+  } else {
+    ppp_settings.user[0] = '\0';
+  }
+
+  if(passwd) {
+    strncpy(ppp_settings.passwd, passwd, sizeof(ppp_settings.passwd)-1);
+    ppp_settings.passwd[sizeof(ppp_settings.passwd)-1] = '\0';
+  } else {
+    ppp_settings.passwd[0] = '\0';
+  }
+}
+
+#if PPPOS_SUPPORT
+/* Open a new PPP connection using the given I/O device.
+ * This initializes the PPP control block but does not
+ * attempt to negotiate the LCP session.  If this port
+ * connects to a modem, the modem connection must be
+ * established before calling this.
+ * Return a new PPP connection descriptor on success or
+ * an error code (negative) on failure. */
+int
+pppOverSerialOpen(sio_fd_t fd, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx)
+{
+  PPPControl *pc;
+  int pd;
+
+  /* Find a free PPP session descriptor. Critical region? */
+  for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
+
+  if (pd >= NUM_PPP) {
+    pd = PPPERR_OPEN;
+  } else {
+    pppControl[pd].openFlag = !0;
+  }
+
+  /* Launch a deamon thread. */
+  if (pd >= 0) {
+    pppControl[pd].openFlag = 1;
+
+    lcp_init(pd);
+    pc = &pppControl[pd];
+    pc->fd = fd;
+#if PPPOE_SUPPORT
+    pc->ethif= NULL;
+#endif /* PPPOE_SUPPORT */
+    pc->kill_link = 0;
+    pc->sig_hup = 0;
+    pc->if_up = 0;
+    pc->errCode = 0;
+    pc->inState = PDIDLE;
+    pc->inHead = NULL;
+    pc->inTail = NULL;
+    pc->inEscaped = 0;
+    pc->lastXMit = 0;
+
+#if VJ_SUPPORT
+    pc->vjEnabled = 0;
+    vj_compress_init(&pc->vjComp);
+#endif /* VJ_SUPPORT */
+
+    /* 
+     * Default the in and out accm so that escape and flag characters
+     * are always escaped. 
+     */
+    memset(pc->inACCM, 0, sizeof(ext_accm));
+    pc->inACCM[15] = 0x60;
+    memset(pc->outACCM, 0, sizeof(ext_accm));
+    pc->outACCM[15] = 0x60;
+
+    pc->linkStatusCB = linkStatusCB;
+    pc->linkStatusCtx = linkStatusCtx;
+
+    sys_thread_new(PPP_THREAD_NAME, pppMain, (void*)pd, PPP_THREAD_STACKSIZE, PPP_THREAD_PRIO);
+    if(!linkStatusCB) {
+      while(pd >= 0 && !pc->if_up) {
+        sys_msleep(500);
+        if (lcp_phase[pd] == PHASE_DEAD) {
+          pppClose(pd);
+          if (pc->errCode) {
+            pd = pc->errCode;
+          } else {
+            pd = PPPERR_CONNECT;
+          }
+        }
+      }
+    }
+  }
+
+  return pd;
+}
+#endif /* PPPOS_SUPPORT */
+
+#if PPPOE_SUPPORT
+static void pppOverEthernetLinkStatusCB(int pd, int up);
+
+void
+pppOverEthernetClose(int pd)
+{
+  PPPControl* pc = &pppControl[pd];
+
+  /* *TJL* There's no lcp_deinit */
+  lcp_close(pd, NULL);
+
+  pppoe_destroy(&pc->netif);
+}
+
+int pppOverEthernetOpen(struct netif *ethif, const char *service_name, const char *concentrator_name, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx)
+{
+  PPPControl *pc;
+  int pd;
+
+  LWIP_UNUSED_ARG(service_name);
+  LWIP_UNUSED_ARG(concentrator_name);
+
+  /* Find a free PPP session descriptor. Critical region? */
+  for (pd = 0; pd < NUM_PPP && pppControl[pd].openFlag != 0; pd++);
+  if (pd >= NUM_PPP) {
+    pd = PPPERR_OPEN;
+  } else {
+    pppControl[pd].openFlag = !0;
+  }
+
+  /* Launch a deamon thread. */
+  if (pd >= 0) {
+
+    pppControl[pd].openFlag = 1;
+
+    lcp_init(pd);
+
+    lcp_wantoptions[pd].mru = PPPOE_MAXMTU;
+    lcp_wantoptions[pd].neg_asyncmap = 0;
+    lcp_wantoptions[pd].neg_pcompression = 0;
+    lcp_wantoptions[pd].neg_accompression = 0;
+
+    lcp_allowoptions[pd].mru = PPPOE_MAXMTU;
+    lcp_allowoptions[pd].neg_asyncmap = 0;
+    lcp_allowoptions[pd].neg_pcompression = 0;
+    lcp_allowoptions[pd].neg_accompression = 0;
+
+    pc = &pppControl[pd];
+    pc->if_up = 0;
+    pc->errCode = 0;
+    pc->lastXMit = 0;
+#if PPPOS_SUPPORT
+    pc->kill_link = 0;
+    pc->sig_hup = 0;
+    pc->inState = PDIDLE;
+    pc->inHead = NULL;
+    pc->inTail = NULL;
+    pc->inEscaped = 0;
+#if VJ_SUPPORT
+    pc->vjEnabled = 0;
+#endif /* VJ_SUPPORT */
+#endif /* PPPOS_SUPPORT */
+    pc->ethif= ethif;
+
+    memset(pc->inACCM,  0, sizeof(ext_accm));
+    memset(pc->outACCM, 0, sizeof(ext_accm));
+
+    pc->linkStatusCB  = linkStatusCB;
+    pc->linkStatusCtx = linkStatusCtx;
+
+    if(pppoe_create(ethif, pd, pppOverEthernetLinkStatusCB, &pc->pppoe_sc) != ERR_OK) {
+      pc->openFlag = 0;
+      return PPPERR_OPEN;
+    }
+
+    pppoe_connect(pc->pppoe_sc);
+
+    if(!linkStatusCB) {
+      while(pd >= 0 && !pc->if_up) {
+        sys_msleep(500);
+        if (lcp_phase[pd] == PHASE_DEAD) {
+          pppClose(pd);
+          if (pc->errCode) {
+            pd = pc->errCode;
+          } else {
+            pd = PPPERR_CONNECT;
+          }
+        }
+      }
+    }
+  }
+
+  return pd;
+}
+#endif /* PPPOE_SUPPORT */
+
+
+/* Close a PPP connection and release the descriptor. 
+ * Any outstanding packets in the queues are dropped.
+ * Return 0 on success, an error code on failure. */
+int
+pppClose(int pd)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 0;
+
+  /* Disconnect */
+#if PPPOE_SUPPORT
+  if(pc->ethif) {
+    PPPDEBUG((LOG_DEBUG, "pppClose: unit %d kill_link -> pppStopCB\n", pd));
+    pc->errCode = PPPERR_USER;
+    /* This will leave us at PHASE_DEAD. */
+    tcpip_callback(pppStopCB, (void*)pd);
+  } else
+#endif /* PPPOE_SUPPORT */
+  {
+#if PPPOS_SUPPORT
+    pc->kill_link = !0;
+    pppMainWakeup(pd);
+#endif /* PPPOS_SUPPORT */
+  }
+
+  if(!pc->linkStatusCB) {
+    while(st >= 0 && lcp_phase[pd] != PHASE_DEAD) {
+      sys_msleep(500);
+      break;
+    }
+  }
+
+  return st;
+}
+
+/* This function is called when carrier is lost on the PPP channel. */
+void
+pppSigHUP(int pd)
+{
+  PPPControl *pc = &pppControl[pd];
+
+#if PPPOE_SUPPORT
+  if(pc->ethif) {
+    PPPDEBUG((LOG_DEBUG, "pppSigHUP: unit %d sig_hup -> pppHupCB\n", pd));
+    tcpip_callback(pppHupCB, (void*)pd);
+  } else
+#endif /* PPPOE_SUPPORT */
+  {
+#if PPPOS_SUPPORT
+    pc->sig_hup = 1;
+    pppMainWakeup(pd);
+#endif /* PPPOS_SUPPORT */
+  }
+}
+
+#if PPPOS_SUPPORT
+static void
+nPut(PPPControl *pc, struct pbuf *nb)
+{
+  struct pbuf *b;
+  int c;
+
+  for(b = nb; b != NULL; b = b->next) {
+    if((c = sio_write(pc->fd, b->payload, b->len)) != b->len) {
+      PPPDEBUG((LOG_WARNING,
+               "PPP nPut: incomplete sio_write(%d,, %u) = %d\n", pc->fd, b->len, c));
+      LINK_STATS_INC(link.err);
+      pc->lastXMit = 0; /* prepend PPP_FLAG to next packet */
+      break;
+    }
+  }
+
+  pbuf_free(nb);
+  LINK_STATS_INC(link.xmit);
+}
+
+/* 
+ * pppAppend - append given character to end of given pbuf.  If outACCM
+ * is not NULL and the character needs to be escaped, do so.
+ * If pbuf is full, append another.
+ * Return the current pbuf.
+ */
+static struct pbuf *
+pppAppend(u_char c, struct pbuf *nb, ext_accm *outACCM)
+{
+  struct pbuf *tb = nb;
+  
+  /* Make sure there is room for the character and an escape code.
+   * Sure we don't quite fill the buffer if the character doesn't
+   * get escaped but is one character worth complicating this? */
+  /* Note: We assume no packet header. */
+  if (nb && (PBUF_POOL_BUFSIZE - nb->len) < 2) {
+    tb = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
+    if (tb) {
+      nb->next = tb;
+    } else {
+      LINK_STATS_INC(link.memerr);
+    }
+    nb = tb;
+  }
+
+  if (nb) {
+    if (outACCM && ESCAPE_P(*outACCM, c)) {
+      *((u_char*)nb->payload + nb->len++) = PPP_ESCAPE;
+      *((u_char*)nb->payload + nb->len++) = c ^ PPP_TRANS;
+    } else {
+      *((u_char*)nb->payload + nb->len++) = c;
+    }
+  }
+
+  return tb;
+}
+#endif /* PPPOS_SUPPORT */
+
+#if PPPOE_SUPPORT
+static err_t
+pppifOutputOverEthernet(int pd, struct pbuf *p)
+{
+  PPPControl *pc = &pppControl[pd];
+  struct pbuf *pb;
+  u_short protocol = PPP_IP;
+  int i=0;
+
+  pb = pbuf_alloc(PBUF_LINK, pppoe_hdrlen + sizeof(protocol), PBUF_RAM);
+  if(!pb) {
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.proterr);
+    return ERR_MEM;
+  }
+
+  pbuf_header(pb, -pppoe_hdrlen);
+
+  pc->lastXMit = sys_jiffies();
+
+  if (!pc->pcomp || protocol > 0xFF) {
+    *((u_char*)pb->payload + i++) = (protocol >> 8) & 0xFF;
+  }
+  *((u_char*)pb->payload + i) = protocol & 0xFF;
+
+  pbuf_chain(pb, p);
+
+  if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
+    LINK_STATS_INC(link.err);
+    return PPPERR_DEVICE;
+  }
+
+  LINK_STATS_INC(link.xmit);
+  return ERR_OK;
+}
+#endif /* PPPOE_SUPPORT */
+
+/* Send a packet on the given connection. */
+static err_t
+pppifOutput(struct netif *netif, struct pbuf *pb, struct ip_addr *ipaddr)
+{
+  int pd = (int)netif->state;
+  u_short protocol = PPP_IP;
+  PPPControl *pc = &pppControl[pd];
+#if PPPOS_SUPPORT
+  u_int fcsOut = PPP_INITFCS;
+  struct pbuf *headMB = NULL, *tailMB = NULL, *p;
+  u_char c;
+#endif /* PPPOS_SUPPORT */
+
+  LWIP_UNUSED_ARG(ipaddr);
+
+  /* Validate parameters. */
+  /* We let any protocol value go through - it can't hurt us
+   * and the peer will just drop it if it's not accepting it. */
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag || !pb) {
+    PPPDEBUG((LOG_WARNING, "pppifOutput[%d]: bad parms prot=%d pb=%p\n",
+              pd, protocol, pb));
+    LINK_STATS_INC(link.opterr);
+    LINK_STATS_INC(link.drop);
+    return ERR_ARG;
+  }
+
+  /* Check that the link is up. */
+  if (lcp_phase[pd] == PHASE_DEAD) {
+    PPPDEBUG((LOG_ERR, "pppifOutput[%d]: link not up\n", pd));
+    LINK_STATS_INC(link.rterr);
+    LINK_STATS_INC(link.drop);
+    return ERR_RTE;
+  }
+
+#if PPPOE_SUPPORT
+  if(pc->ethif) {
+    return pppifOutputOverEthernet(pd, pb);
+  }
+#endif /* PPPOE_SUPPORT */
+
+#if PPPOS_SUPPORT
+  /* Grab an output buffer. */
+  headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
+  if (headMB == NULL) {
+    PPPDEBUG((LOG_WARNING, "pppifOutput[%d]: first alloc fail\n", pd));
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.drop);
+    return ERR_MEM;
+  }
+
+#if VJ_SUPPORT
+  /* 
+   * Attempt Van Jacobson header compression if VJ is configured and
+   * this is an IP packet. 
+   */
+  if (protocol == PPP_IP && pc->vjEnabled) {
+    switch (vj_compress_tcp(&pc->vjComp, pb)) {
+      case TYPE_IP:
+        /* No change...
+           protocol = PPP_IP_PROTOCOL; */
+        break;
+      case TYPE_COMPRESSED_TCP:
+        protocol = PPP_VJC_COMP;
+        break;
+      case TYPE_UNCOMPRESSED_TCP:
+        protocol = PPP_VJC_UNCOMP;
+        break;
+      default:
+        PPPDEBUG((LOG_WARNING, "pppifOutput[%d]: bad IP packet\n", pd));
+        LINK_STATS_INC(link.proterr);
+        LINK_STATS_INC(link.drop);
+        pbuf_free(headMB);
+        return ERR_VAL;
+    }
+  }
+#endif /* VJ_SUPPORT */
+
+  tailMB = headMB;
+
+  /* Build the PPP header. */
+  if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
+    tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
+  }
+
+  pc->lastXMit = sys_jiffies();
+  if (!pc->accomp) {
+    fcsOut = PPP_FCS(fcsOut, PPP_ALLSTATIONS);
+    tailMB = pppAppend(PPP_ALLSTATIONS, tailMB, &pc->outACCM);
+    fcsOut = PPP_FCS(fcsOut, PPP_UI);
+    tailMB = pppAppend(PPP_UI, tailMB, &pc->outACCM);
+  }
+  if (!pc->pcomp || protocol > 0xFF) {
+    c = (protocol >> 8) & 0xFF;
+    fcsOut = PPP_FCS(fcsOut, c);
+    tailMB = pppAppend(c, tailMB, &pc->outACCM);
+  }
+  c = protocol & 0xFF;
+  fcsOut = PPP_FCS(fcsOut, c);
+  tailMB = pppAppend(c, tailMB, &pc->outACCM);
+
+  /* Load packet. */
+  for(p = pb; p; p = p->next) {
+    int n;
+    u_char *sPtr;
+
+    sPtr = (u_char*)p->payload;
+    n = p->len;
+    while (n-- > 0) {
+      c = *sPtr++;
+
+      /* Update FCS before checking for special characters. */
+      fcsOut = PPP_FCS(fcsOut, c);
+      
+      /* Copy to output buffer escaping special characters. */
+      tailMB = pppAppend(c, tailMB, &pc->outACCM);
+    }
+  }
+
+  /* Add FCS and trailing flag. */
+  c = ~fcsOut & 0xFF;
+  tailMB = pppAppend(c, tailMB, &pc->outACCM);
+  c = (~fcsOut >> 8) & 0xFF;
+  tailMB = pppAppend(c, tailMB, &pc->outACCM);
+  tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
+
+  /* If we failed to complete the packet, throw it away. */
+  if (!tailMB) {
+    PPPDEBUG((LOG_WARNING,
+             "pppifOutput[%d]: Alloc err - dropping proto=%d\n", 
+              pd, protocol));
+    pbuf_free(headMB);
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.drop);
+    return ERR_MEM;
+  }
+
+  /* Send it. */
+  PPPDEBUG((LOG_INFO, "pppifOutput[%d]: proto=0x%04X\n", pd, protocol));
+
+  nPut(pc, headMB);
+#endif /* PPPOS_SUPPORT */
+
+  return ERR_OK;
+}
+
+/* Get and set parameters for the given connection.
+ * Return 0 on success, an error code on failure. */
+int
+pppIOCtl(int pd, int cmd, void *arg)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 0;
+
+  if (pd < 0 || pd >= NUM_PPP) {
+    st = PPPERR_PARAM;
+  } else {
+    switch(cmd) {
+    case PPPCTLG_UPSTATUS:      /* Get the PPP up status. */
+      if (arg) {
+        *(int *)arg = (int)(pc->if_up);
+      } else {
+        st = PPPERR_PARAM;
+      }
+      break;
+    case PPPCTLS_ERRCODE:       /* Set the PPP error code. */
+      if (arg) {
+        pc->errCode = *(int *)arg;
+      } else {
+        st = PPPERR_PARAM;
+      }
+      break;
+    case PPPCTLG_ERRCODE:       /* Get the PPP error code. */
+      if (arg) {
+        *(int *)arg = (int)(pc->errCode);
+      } else {
+        st = PPPERR_PARAM;
+      }
+      break;
+#if PPPOS_SUPPORT
+    case PPPCTLG_FD:
+      if (arg) {
+        *(sio_fd_t *)arg = pc->fd;
+      } else {
+        st = PPPERR_PARAM;
+      }
+      break;
+#endif /* PPPOS_SUPPORT */
+    default:
+      st = PPPERR_PARAM;
+      break;
+    }
+  }
+
+  return st;
+}
+
+/*
+ * Return the Maximum Transmission Unit for the given PPP connection.
+ */
+u_int
+pppMTU(int pd)
+{
+  PPPControl *pc = &pppControl[pd];
+  u_int st;
+
+  /* Validate parameters. */
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
+    st = 0;
+  } else {
+    st = pc->mtu;
+  }
+
+  return st;
+}
+
+#if PPPOE_SUPPORT
+int
+pppWriteOverEthernet(int pd, const u_char *s, int n)
+{
+  PPPControl *pc = &pppControl[pd];
+  struct pbuf *pb;
+
+  /* skip address & flags */
+  s += 2;
+  n -= 2;
+
+  pb = pbuf_alloc(PBUF_LINK, pppoe_hdrlen + n, PBUF_RAM);
+  if(!pb) {
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.proterr);
+    return PPPERR_ALLOC;
+  }
+
+  pbuf_header(pb, -pppoe_hdrlen);
+
+  pc->lastXMit = sys_jiffies();
+
+  MEMCPY(pb->payload, s, n);
+
+  if(pppoe_xmit(pc->pppoe_sc, pb) != ERR_OK) {
+    LINK_STATS_INC(link.err);
+    return PPPERR_DEVICE;
+  }
+
+  LINK_STATS_INC(link.xmit);
+  return PPPERR_NONE;
+}
+#endif /* PPPOE_SUPPORT */
+
+/*
+ * Write n characters to a ppp link.
+ *  RETURN: >= 0 Number of characters written
+ *           -1 Failed to write to device
+ */
+int
+pppWrite(int pd, const u_char *s, int n)
+{
+  PPPControl *pc = &pppControl[pd];
+#if PPPOS_SUPPORT
+  u_char c;
+  u_int fcsOut;
+  struct pbuf *headMB, *tailMB;
+#endif /* PPPOS_SUPPORT */
+
+#if PPPOE_SUPPORT
+  if(pc->ethif) {
+    return pppWriteOverEthernet(pd, s, n);
+  }
+#endif /* PPPOE_SUPPORT */
+
+#if PPPOS_SUPPORT
+  headMB = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
+  if (headMB == NULL) {
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.proterr);
+    return PPPERR_ALLOC;
+  }
+
+  tailMB = headMB;
+
+  /* If the link has been idle, we'll send a fresh flag character to
+   * flush any noise. */
+  if ((sys_jiffies() - pc->lastXMit) >= PPP_MAXIDLEFLAG) {
+    tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
+  }
+  pc->lastXMit = sys_jiffies();
+
+  fcsOut = PPP_INITFCS;
+  /* Load output buffer. */
+  while (n-- > 0) {
+    c = *s++;
+
+    /* Update FCS before checking for special characters. */
+    fcsOut = PPP_FCS(fcsOut, c);
+
+    /* Copy to output buffer escaping special characters. */
+    tailMB = pppAppend(c, tailMB, &pc->outACCM);
+  }
+    
+  /* Add FCS and trailing flag. */
+  c = ~fcsOut & 0xFF;
+  tailMB = pppAppend(c, tailMB, &pc->outACCM);
+  c = (~fcsOut >> 8) & 0xFF;
+  tailMB = pppAppend(c, tailMB, &pc->outACCM);
+  tailMB = pppAppend(PPP_FLAG, tailMB, NULL);
+
+  /* If we failed to complete the packet, throw it away.
+   * Otherwise send it. */
+  if (!tailMB) {
+    PPPDEBUG((LOG_WARNING,
+             "pppWrite[%d]: Alloc err - dropping pbuf len=%d\n", pd, headMB->len));
+           /*"pppWrite[%d]: Alloc err - dropping %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
+    pbuf_free(headMB);
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.proterr);
+    return PPPERR_ALLOC;
+  }
+
+  PPPDEBUG((LOG_INFO, "pppWrite[%d]: len=%d\n", pd, headMB->len));
+                   /* "pppWrite[%d]: %d:%.*H", pd, headMB->len, LWIP_MIN(headMB->len * 2, 40), headMB->payload)); */
+  nPut(pc, headMB);
+#endif /* PPPOS_SUPPORT */
+
+  return PPPERR_NONE;
+}
+
+/*
+ * ppp_send_config - configure the transmit characteristics of
+ * the ppp interface.
+ */
+void
+ppp_send_config( int unit, int mtu, u32_t asyncmap, int pcomp, int accomp)
+{
+  PPPControl *pc = &pppControl[unit];
+  int i;
+  
+  pc->mtu = mtu;
+  pc->pcomp = pcomp;
+  pc->accomp = accomp;
+  
+  /* Load the ACCM bits for the 32 control codes. */
+  for (i = 0; i < 32/8; i++) {
+    pc->outACCM[i] = (u_char)((asyncmap >> (8 * i)) & 0xFF);
+  }
+  PPPDEBUG((LOG_INFO, "ppp_send_config[%d]: outACCM=%X %X %X %X\n",
+            unit,
+            pc->outACCM[0], pc->outACCM[1], pc->outACCM[2], pc->outACCM[3]));
+}
+
+
+/*
+ * ppp_set_xaccm - set the extended transmit ACCM for the interface.
+ */
+void
+ppp_set_xaccm(int unit, ext_accm *accm)
+{
+  SMEMCPY(pppControl[unit].outACCM, accm, sizeof(ext_accm));
+  PPPDEBUG((LOG_INFO, "ppp_set_xaccm[%d]: outACCM=%X %X %X %X\n",
+            unit,
+            pppControl[unit].outACCM[0],
+            pppControl[unit].outACCM[1],
+            pppControl[unit].outACCM[2],
+            pppControl[unit].outACCM[3]));
+}
+
+
+/*
+ * ppp_recv_config - configure the receive-side characteristics of
+ * the ppp interface.
+ */
+void
+ppp_recv_config( int unit, int mru, u32_t asyncmap, int pcomp, int accomp)
+{
+  PPPControl *pc = &pppControl[unit];
+  int i;
+
+  LWIP_UNUSED_ARG(accomp);
+  LWIP_UNUSED_ARG(pcomp);
+  LWIP_UNUSED_ARG(mru);
+
+  /* Load the ACCM bits for the 32 control codes. */
+  for (i = 0; i < 32 / 8; i++) {
+    pc->inACCM[i] = (u_char)(asyncmap >> (i * 8));
+  }
+  PPPDEBUG((LOG_INFO, "ppp_recv_config[%d]: inACCM=%X %X %X %X\n",
+            unit,
+            pc->inACCM[0], pc->inACCM[1], pc->inACCM[2], pc->inACCM[3]));
+}
+
+#if 0
+/*
+ * ccp_test - ask kernel whether a given compression method
+ * is acceptable for use.  Returns 1 if the method and parameters
+ * are OK, 0 if the method is known but the parameters are not OK
+ * (e.g. code size should be reduced), or -1 if the method is unknown.
+ */
+int
+ccp_test( int unit, int opt_len,  int for_transmit, u_char *opt_ptr)
+{
+  return 0; /* XXX Currently no compression. */
+}
+
+/*
+ * ccp_flags_set - inform kernel about the current state of CCP.
+ */
+void
+ccp_flags_set(int unit, int isopen, int isup)
+{
+  /* XXX */
+}
+
+/*
+ * ccp_fatal_error - returns 1 if decompression was disabled as a
+ * result of an error detected after decompression of a packet,
+ * 0 otherwise.  This is necessary because of patent nonsense.
+ */
+int
+ccp_fatal_error(int unit)
+{
+  /* XXX */
+  return 0;
+}
+#endif
+
+/*
+ * get_idle_time - return how long the link has been idle.
+ */
+int
+get_idle_time(int u, struct ppp_idle *ip)
+{
+  /* XXX */
+  LWIP_UNUSED_ARG(u);
+  LWIP_UNUSED_ARG(ip);
+
+  return 0;
+}
+
+
+/*
+ * Return user specified netmask, modified by any mask we might determine
+ * for address `addr' (in network byte order).
+ * Here we scan through the system's list of interfaces, looking for
+ * any non-point-to-point interfaces which might appear to be on the same
+ * network as `addr'.  If we find any, we OR in their netmask to the
+ * user-specified netmask.
+ */
+u32_t
+GetMask(u32_t addr)
+{
+  u32_t mask, nmask;
+
+  htonl(addr);
+  if (IN_CLASSA(addr)) { /* determine network mask for address class */
+    nmask = IN_CLASSA_NET;
+  } else if (IN_CLASSB(addr)) {
+    nmask = IN_CLASSB_NET;
+  } else { 
+    nmask = IN_CLASSC_NET;
+  }
+
+  /* class D nets are disallowed by bad_ip_adrs */
+  mask = subnetMask | htonl(nmask);
+  
+  /* XXX
+   * Scan through the system's network interfaces.
+   * Get each netmask and OR them into our mask.
+   */
+
+  return mask;
+}
+
+/*
+ * sifvjcomp - config tcp header compression
+ */
+int
+sifvjcomp( int pd, int vjcomp, int cidcomp, int maxcid)
+{
+#if PPPOS_SUPPORT && VJ_SUPPORT
+  PPPControl *pc = &pppControl[pd];
+  
+  pc->vjEnabled = vjcomp;
+  pc->vjComp.compressSlot = cidcomp;
+  pc->vjComp.maxSlotIndex = maxcid;
+  PPPDEBUG((LOG_INFO, "sifvjcomp: VJ compress enable=%d slot=%d max slot=%d\n",
+            vjcomp, cidcomp, maxcid));
+#endif /* PPPOS_SUPPORT && VJ_SUPPORT */
+
+  return 0;
+}
+
+/*
+ * pppifNetifInit - netif init callback
+ */
+static err_t
+pppifNetifInit(struct netif *netif)
+{
+  netif->name[0] = 'p';
+  netif->name[1] = 'p';
+  netif->output = pppifOutput;
+  netif->mtu = pppMTU((int)netif->state);
+  return ERR_OK;
+}
+
+
+/*
+ * sifup - Config the interface up and enable IP packets to pass.
+ */
+int
+sifup(int pd)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 1;
+  
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
+    st = 0;
+    PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd));
+  } else {
+    netif_remove(&pc->netif);
+    if (netif_add(&pc->netif, &pc->addrs.our_ipaddr, &pc->addrs.netmask, &pc->addrs.his_ipaddr, (void *)pd, pppifNetifInit, ip_input)) {
+      netif_set_up(&pc->netif);
+      pc->if_up = 1;
+      pc->errCode = PPPERR_NONE;
+
+      PPPDEBUG((LOG_DEBUG, "sifup: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
+      if(pc->linkStatusCB) {
+        pc->linkStatusCB(pc->linkStatusCtx, pc->errCode, &pc->addrs);
+      }
+    } else {
+      st = 0;
+      PPPDEBUG((LOG_ERR, "sifup[%d]: netif_add failed\n", pd));
+    }
+  }
+
+  return st;
+}
+
+/*
+ * sifnpmode - Set the mode for handling packets for a given NP.
+ */
+int
+sifnpmode(int u, int proto, enum NPmode mode)
+{
+  LWIP_UNUSED_ARG(u);
+  LWIP_UNUSED_ARG(proto);
+  LWIP_UNUSED_ARG(mode);
+  return 0;
+}
+
+/*
+ * sifdown - Config the interface down and disable IP.
+ */
+int
+sifdown(int pd)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 1;
+  
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
+    st = 0;
+    PPPDEBUG((LOG_WARNING, "sifdown[%d]: bad parms\n", pd));
+  } else {
+    pc->if_up = 0;
+    netif_remove(&pc->netif);
+    PPPDEBUG((LOG_DEBUG, "sifdown: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
+    if(pc->linkStatusCB) {
+      pc->linkStatusCB(pc->linkStatusCtx, PPPERR_CONNECT, NULL);
+    }
+  }
+  return st;
+}
+
+/**
+ * sifaddr - Config the interface IP addresses and netmask.
+ * @param pd Interface unit ???
+ * @param o Our IP address ???
+ * @param h His IP address ???
+ * @param m IP subnet mask ???
+ * @param ns1 Primary DNS
+ * @param ns2 Secondary DNS
+ */
+int
+sifaddr( int pd, u32_t o, u32_t h, u32_t m, u32_t ns1, u32_t ns2)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 1;
+  
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
+    st = 0;
+    PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd));
+  } else {
+    SMEMCPY(&pc->addrs.our_ipaddr, &o, sizeof(o));
+    SMEMCPY(&pc->addrs.his_ipaddr, &h, sizeof(h));
+    SMEMCPY(&pc->addrs.netmask, &m, sizeof(m));
+    SMEMCPY(&pc->addrs.dns1, &ns1, sizeof(ns1));
+    SMEMCPY(&pc->addrs.dns2, &ns2, sizeof(ns2));
+  }
+  return st;
+}
+
+/**
+ * cifaddr - Clear the interface IP addresses, and delete routes
+ * through the interface if possible.
+ * @param pd Interface unit ???
+ * @param o Our IP address ???
+ * @param h IP broadcast address ???
+ */
+int
+cifaddr( int pd, u32_t o, u32_t h)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 1;
+  
+  LWIP_UNUSED_ARG(o);
+  LWIP_UNUSED_ARG(h);
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
+    st = 0;
+    PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd));
+  } else {
+    IP4_ADDR(&pc->addrs.our_ipaddr, 0,0,0,0);
+    IP4_ADDR(&pc->addrs.his_ipaddr, 0,0,0,0);
+    IP4_ADDR(&pc->addrs.netmask, 255,255,255,0);
+    IP4_ADDR(&pc->addrs.dns1, 0,0,0,0);
+    IP4_ADDR(&pc->addrs.dns2, 0,0,0,0);
+  }
+  return st;
+}
+
+/*
+ * sifdefaultroute - assign a default route through the address given.
+ */
+int
+sifdefaultroute(int pd, u32_t l, u32_t g)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 1;
+
+  LWIP_UNUSED_ARG(l);
+  LWIP_UNUSED_ARG(g);
+
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
+    st = 0;
+    PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd));
+  } else {
+    netif_set_default(&pc->netif);
+  }
+
+  /* TODO: check how PPP handled the netMask, previously not set by ipSetDefault */
+
+  return st;
+}
+
+/*
+ * cifdefaultroute - delete a default route through the address given.
+ */
+int
+cifdefaultroute(int pd, u32_t l, u32_t g)
+{
+  PPPControl *pc = &pppControl[pd];
+  int st = 1;
+
+  LWIP_UNUSED_ARG(l);
+  LWIP_UNUSED_ARG(g);
+
+  if (pd < 0 || pd >= NUM_PPP || !pc->openFlag) {
+    st = 0;
+    PPPDEBUG((LOG_WARNING, "sifup[%d]: bad parms\n", pd));
+  } else {
+    netif_set_default(NULL);
+  }
+
+  return st;
+}
+
+/**********************************/
+/*** LOCAL FUNCTION DEFINITIONS ***/
+/**********************************/
+
+#if PPPOS_SUPPORT
+/* The main PPP process function.  This implements the state machine according
+ * to section 4 of RFC 1661: The Point-To-Point Protocol. */
+static void
+pppMain(void *arg)
+{
+  int pd = (int)arg;
+  struct pbuf *p;
+  PPPControl* pc;
+  int c;
+
+  pc = &pppControl[pd];
+
+  p = pbuf_alloc(PBUF_RAW, PPP_MRU+PPP_HDRLEN, PBUF_RAM);
+  if (!p) {
+    LWIP_ASSERT("p != NULL", p);
+    pc->errCode = PPPERR_ALLOC;
+    goto out;
+  }
+
+  /*
+   * Start the connection and handle incoming events (packet or timeout).
+   */
+  PPPDEBUG((LOG_INFO, "pppMain: unit %d: Connecting\n", pd));
+  tcpip_callback(pppStartCB, arg);
+  while (lcp_phase[pd] != PHASE_DEAD) {
+    if (pc->kill_link) {
+      PPPDEBUG((LOG_DEBUG, "pppMain: unit %d kill_link -> pppStopCB\n", pd));
+      pc->errCode = PPPERR_USER;
+      /* This will leave us at PHASE_DEAD. */
+      tcpip_callback(pppStopCB, arg);
+      pc->kill_link = 0;
+    } else if (pc->sig_hup) {
+      PPPDEBUG((LOG_DEBUG, "pppMain: unit %d sig_hup -> pppHupCB\n", pd));
+      pc->sig_hup = 0;
+      tcpip_callback(pppHupCB, arg);
+    } else {
+      c = sio_read(pc->fd, p->payload, p->len);
+      if(c > 0) {
+        pppInProc(pd, p->payload, c);
+      } else {
+        PPPDEBUG((LOG_DEBUG, "pppMain: unit %d sio_read len=%d returned %d\n", pd, p->len, c));
+        sys_msleep(1); /* give other tasks a chance to run */
+      }
+    }
+  }
+  PPPDEBUG((LOG_INFO, "pppMain: unit %d: PHASE_DEAD\n", pd));
+  pppDrop(pc); /* bug fix #17726 */
+  pbuf_free(p);
+
+out:
+  PPPDEBUG((LOG_DEBUG, "pppMain: unit %d: linkStatusCB=%lx errCode=%d\n", pd, pc->linkStatusCB, pc->errCode));
+  if(pc->linkStatusCB) {
+    pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
+  }
+
+  pc->openFlag = 0;
+}
+#endif /* PPPOS_SUPPORT */
+
+#if PPPOE_SUPPORT
+
+void
+pppOverEthernetInitFailed(void* arg)
+{
+  PPPControl* pc;
+  int pd = (int)arg;
+
+  pppHupCB(arg);
+  pppStopCB(arg);
+
+  pc = &pppControl[pd];
+  pppoe_destroy(&pc->netif);
+  pc->openFlag = 0;
+
+  if(pc->linkStatusCB) {
+    pc->linkStatusCB(pc->linkStatusCtx, pc->errCode ? pc->errCode : PPPERR_PROTOCOL, NULL);
+  }
+}
+
+static void
+pppOverEthernetLinkStatusCB(int pd, int up)
+{
+  if(up) {
+    PPPDEBUG((LOG_INFO, "pppMain: unit %d: Connecting\n", pd));
+    tcpip_callback(pppStartCB, (void*)pd);
+  } else {
+    PPPControl* pc;
+    pc = &pppControl[pd];
+    tcpip_callback(pppOverEthernetInitFailed, (void*)pd);
+  }
+}
+#endif /* PPPOE_SUPPORT */
+
+struct pbuf *
+pppSingleBuf(struct pbuf *p)
+{
+  struct pbuf *q, *b;
+  u_char *pl;
+
+  if(p->tot_len == p->len) {
+    return p;
+  }
+
+  q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
+  if(!q) {
+    PPPDEBUG((LOG_ERR,
+             "pppSingleBuf: unable to alloc new buf (%d)\n", p->tot_len));
+    return p; /* live dangerously */
+  }
+
+  for(b = p, pl = q->payload; b != NULL; b = b->next) {
+    MEMCPY(pl, b->payload, b->len);
+    pl += b->len;
+  }
+
+  pbuf_free(p);
+
+  return q;
+}
+
+struct pppInputHeader {
+  int unit;
+  u16_t proto;
+};
+
+/*
+ * Pass the processed input packet to the appropriate handler.
+ * This function and all handlers run in the context of the tcpip_thread
+ */
+static void
+pppInput(void *arg)
+{
+  struct pbuf *nb = (struct pbuf *)arg;
+  u16_t protocol;
+  int pd;
+
+  pd = ((struct pppInputHeader *)nb->payload)->unit;
+  protocol = ((struct pppInputHeader *)nb->payload)->proto;
+    
+  if(pbuf_header(nb, -(int)sizeof(struct pppInputHeader))) {
+    LWIP_ASSERT("pbuf_header failed\n", 0);
+    goto drop;
+  }
+
+  LINK_STATS_INC(link.recv);
+
+  /*
+   * Toss all non-LCP packets unless LCP is OPEN.
+   * Until we get past the authentication phase, toss all packets
+   * except LCP, LQR and authentication packets.
+   */
+  if((lcp_phase[pd] <= PHASE_AUTHENTICATE) && (protocol != PPP_LCP)) {
+    if(!((protocol == PPP_LQR) || (protocol == PPP_PAP) || (protocol == PPP_CHAP)) ||
+        (lcp_phase[pd] != PHASE_AUTHENTICATE)) {
+      PPPDEBUG((LOG_INFO, "pppInput: discarding proto 0x%04X in phase %d\n", protocol, lcp_phase[pd]));
+      goto drop;
+    }
+  }
+
+  switch(protocol) {
+    case PPP_VJC_COMP:      /* VJ compressed TCP */
+#if VJ_SUPPORT
+      PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_comp in pbuf len=%d\n", pd, nb->len));
+      /*
+       * Clip off the VJ header and prepend the rebuilt TCP/IP header and
+       * pass the result to IP.
+       */
+      if ((vj_uncompress_tcp(&nb, &pppControl[pd].vjComp) >= 0) && (pppControl[pd].netif.input)) {
+        pppControl[pd].netif.input(nb, &pppControl[pd].netif);
+        return;
+      }
+      /* Something's wrong so drop it. */
+      PPPDEBUG((LOG_WARNING, "pppInput[%d]: Dropping VJ compressed\n", pd));
+#else  /* VJ_SUPPORT */
+      /* No handler for this protocol so drop the packet. */
+      PPPDEBUG((LOG_INFO, "pppInput[%d]: drop VJ Comp in %d:%s\n", pd, nb->len, nb->payload));
+#endif /* VJ_SUPPORT */
+      break;
+
+    case PPP_VJC_UNCOMP:    /* VJ uncompressed TCP */
+#if VJ_SUPPORT
+      PPPDEBUG((LOG_INFO, "pppInput[%d]: vj_un in pbuf len=%d\n", pd, nb->len));
+      /*
+       * Process the TCP/IP header for VJ header compression and then pass
+       * the packet to IP.
+       */
+      if ((vj_uncompress_uncomp(nb, &pppControl[pd].vjComp) >= 0) && pppControl[pd].netif.input) {
+        pppControl[pd].netif.input(nb, &pppControl[pd].netif);
+        return;
+      }
+      /* Something's wrong so drop it. */
+      PPPDEBUG((LOG_WARNING, "pppInput[%d]: Dropping VJ uncompressed\n", pd));
+#else  /* VJ_SUPPORT */
+      /* No handler for this protocol so drop the packet. */
+      PPPDEBUG((LOG_INFO,
+               "pppInput[%d]: drop VJ UnComp in %d:.*H\n", 
+                pd, nb->len, LWIP_MIN(nb->len * 2, 40), nb->payload));
+#endif /* VJ_SUPPORT */
+      break;
+
+    case PPP_IP:            /* Internet Protocol */
+      PPPDEBUG((LOG_INFO, "pppInput[%d]: ip in pbuf len=%d\n", pd, nb->len));
+      if (pppControl[pd].netif.input) {
+        pppControl[pd].netif.input(nb, &pppControl[pd].netif);
+        return;
+      }
+      break;
+
+    default: {
+      struct protent *protp;
+      int i;
+
+      /*
+       * Upcall the proper protocol input routine.
+       */
+      for (i = 0; (protp = ppp_protocols[i]) != NULL; ++i) {
+        if (protp->protocol == protocol && protp->enabled_flag) {
+          PPPDEBUG((LOG_INFO, "pppInput[%d]: %s len=%d\n", pd, protp->name, nb->len));
+          nb = pppSingleBuf(nb);
+          (*protp->input)(pd, nb->payload, nb->len);
+          goto out;
+        }
+      }
+
+      /* No handler for this protocol so reject the packet. */
+      PPPDEBUG((LOG_INFO, "pppInput[%d]: rejecting unsupported proto 0x%04X len=%d\n", pd, protocol, nb->len));
+      if (pbuf_header(nb, sizeof(protocol))) {
+        LWIP_ASSERT("pbuf_header failed\n", 0);
+        goto drop;
+      }
+#if BYTE_ORDER == LITTLE_ENDIAN
+      protocol = htons(protocol);
+      SMEMCPY(nb->payload, &protocol, sizeof(protocol));
+#endif /* BYTE_ORDER == LITTLE_ENDIAN */
+      lcp_sprotrej(pd, nb->payload, nb->len);
+    }
+    break;
+  }
+
+drop:
+  LINK_STATS_INC(link.drop);
+
+out:
+  pbuf_free(nb);
+  return;
+}
+
+#if PPPOS_SUPPORT
+/*
+ * Drop the input packet.
+ */
+static void
+pppDrop(PPPControl *pc)
+{
+  if (pc->inHead != NULL) {
+#if 0
+    PPPDEBUG((LOG_INFO, "pppDrop: %d:%.*H\n", pc->inHead->len, min(60, pc->inHead->len * 2), pc->inHead->payload));
+#endif
+    PPPDEBUG((LOG_INFO, "pppDrop: pbuf len=%d\n", pc->inHead->len));
+    if (pc->inTail && (pc->inTail != pc->inHead)) {
+      pbuf_free(pc->inTail);
+    }
+    pbuf_free(pc->inHead);
+    pc->inHead = NULL;
+    pc->inTail = NULL;
+  }
+#if VJ_SUPPORT
+  vj_uncompress_err(&pc->vjComp);
+#endif /* VJ_SUPPORT */
+
+  LINK_STATS_INC(link.drop);
+}
+
+/**
+ * Process a received octet string.
+ */
+static void
+pppInProc(int pd, u_char *s, int l)
+{
+  PPPControl *pc = &pppControl[pd];
+  struct pbuf *nextNBuf;
+  u_char curChar;
+
+  PPPDEBUG((LOG_DEBUG, "pppInProc[%d]: got %d bytes\n", pd, l));
+  while (l-- > 0) {
+    curChar = *s++;
+    
+    /* Handle special characters. */
+    if (ESCAPE_P(pc->inACCM, curChar)) {
+      /* Check for escape sequences. */
+      /* XXX Note that this does not handle an escaped 0x5d character which
+       * would appear as an escape character.  Since this is an ASCII ']'
+       * and there is no reason that I know of to escape it, I won't complicate
+       * the code to handle this case. GLL */
+      if (curChar == PPP_ESCAPE) {
+        pc->inEscaped = 1;
+      /* Check for the flag character. */
+      } else if (curChar == PPP_FLAG) {
+         /* If this is just an extra flag character, ignore it. */
+         if (pc->inState <= PDADDRESS) {
+           /* ignore it */;
+         /* If we haven't received the packet header, drop what has come in. */
+         } else if (pc->inState < PDDATA) {
+           PPPDEBUG((LOG_WARNING,
+                    "pppInProc[%d]: Dropping incomplete packet %d\n", 
+                     pd, pc->inState));
+           LINK_STATS_INC(link.lenerr);
+           pppDrop(pc);
+         /* If the fcs is invalid, drop the packet. */
+         } else if (pc->inFCS != PPP_GOODFCS) {
+           PPPDEBUG((LOG_INFO,
+                    "pppInProc[%d]: Dropping bad fcs 0x%04X proto=0x%04X\n", 
+                     pd, pc->inFCS, pc->inProtocol));
+           LINK_STATS_INC(link.chkerr);
+           pppDrop(pc);
+         /* Otherwise it's a good packet so pass it on. */
+         } else {
+           /* Trim off the checksum. */
+           if(pc->inTail->len >= 2) {
+             pc->inTail->len -= 2;
+
+             pc->inTail->tot_len = pc->inTail->len;
+             if (pc->inTail != pc->inHead) {
+               pbuf_cat(pc->inHead, pc->inTail);
+             }
+           } else {
+             pc->inTail->tot_len = pc->inTail->len;
+             if (pc->inTail != pc->inHead) {
+               pbuf_cat(pc->inHead, pc->inTail);
+             }
+
+             pbuf_realloc(pc->inHead, pc->inHead->tot_len - 2);
+           }
+
+           /* Dispatch the packet thereby consuming it. */
+           if(tcpip_callback(pppInput, pc->inHead) != ERR_OK) {
+             PPPDEBUG((LOG_ERR, "pppInProc[%d]: tcpip_callback() failed, dropping packet\n", pd));
+             pbuf_free(pc->inHead);
+             LINK_STATS_INC(link.drop);
+           }
+           pc->inHead = NULL;
+           pc->inTail = NULL;
+         }
+
+         /* Prepare for a new packet. */
+         pc->inFCS = PPP_INITFCS;
+         pc->inState = PDADDRESS;
+         pc->inEscaped = 0;
+      /* Other characters are usually control characters that may have
+       * been inserted by the physical layer so here we just drop them. */
+      } else {
+        PPPDEBUG((LOG_WARNING,
+                 "pppInProc[%d]: Dropping ACCM char <%d>\n", pd, curChar));
+      }
+    /* Process other characters. */
+    } else {
+      /* Unencode escaped characters. */
+      if (pc->inEscaped) {
+        pc->inEscaped = 0;
+        curChar ^= PPP_TRANS;
+      }
+
+      /* Process character relative to current state. */
+      switch(pc->inState) {
+        case PDIDLE:                    /* Idle state - waiting. */
+          /* Drop the character if it's not 0xff
+           * we would have processed a flag character above. */
+          if (curChar != PPP_ALLSTATIONS) {
+            break;
+          }
+
+        /* Fall through */
+        case PDSTART:                   /* Process start flag. */
+          /* Prepare for a new packet. */
+          pc->inFCS = PPP_INITFCS;
+
+        /* Fall through */
+        case PDADDRESS:                 /* Process address field. */
+          if (curChar == PPP_ALLSTATIONS) {
+            pc->inState = PDCONTROL;
+            break;
+          }
+          /* Else assume compressed address and control fields so
+           * fall through to get the protocol... */
+        case PDCONTROL:                 /* Process control field. */
+          /* If we don't get a valid control code, restart. */
+          if (curChar == PPP_UI) {
+            pc->inState = PDPROTOCOL1;
+            break;
+          }
+#if 0
+          else {
+            PPPDEBUG((LOG_WARNING,
+                     "pppInProc[%d]: Invalid control <%d>\n", pd, curChar));
+                      pc->inState = PDSTART;
+          }
+#endif
+        case PDPROTOCOL1:               /* Process protocol field 1. */
+          /* If the lower bit is set, this is the end of the protocol
+           * field. */
+          if (curChar & 1) {
+            pc->inProtocol = curChar;
+            pc->inState = PDDATA;
+          } else {
+            pc->inProtocol = (u_int)curChar << 8;
+            pc->inState = PDPROTOCOL2;
+          }
+          break;
+        case PDPROTOCOL2:               /* Process protocol field 2. */
+          pc->inProtocol |= curChar;
+          pc->inState = PDDATA;
+          break;
+        case PDDATA:                    /* Process data byte. */
+          /* Make space to receive processed data. */
+          if (pc->inTail == NULL || pc->inTail->len == PBUF_POOL_BUFSIZE) {
+            if(pc->inTail) {
+              pc->inTail->tot_len = pc->inTail->len;
+              if (pc->inTail != pc->inHead) {
+                pbuf_cat(pc->inHead, pc->inTail);
+              }
+            }
+            /* If we haven't started a packet, we need a packet header. */
+            nextNBuf = pbuf_alloc(PBUF_RAW, 0, PBUF_POOL);
+            if (nextNBuf == NULL) {
+              /* No free buffers.  Drop the input packet and let the
+               * higher layers deal with it.  Continue processing
+               * the received pbuf chain in case a new packet starts. */
+              PPPDEBUG((LOG_ERR, "pppInProc[%d]: NO FREE MBUFS!\n", pd));
+              LINK_STATS_INC(link.memerr);
+              pppDrop(pc);
+              pc->inState = PDSTART;  /* Wait for flag sequence. */
+              break;
+            }
+            if (pc->inHead == NULL) {
+              struct pppInputHeader *pih = nextNBuf->payload;
+
+              pih->unit = pd;
+              pih->proto = pc->inProtocol;
+
+              nextNBuf->len += sizeof(*pih);
+
+              pc->inHead = nextNBuf;
+            }
+            pc->inTail = nextNBuf;
+          }
+          /* Load character into buffer. */
+          ((u_char*)pc->inTail->payload)[pc->inTail->len++] = curChar;
+          break;
+      }
+
+      /* update the frame check sequence number. */
+      pc->inFCS = PPP_FCS(pc->inFCS, curChar);
+    }
+  }
+
+  avRandomize();
+}
+#endif /* PPPOS_SUPPORT */
+
+#if PPPOE_SUPPORT
+void
+pppInProcOverEthernet(int pd, struct pbuf *pb)
+{
+  struct pppInputHeader *pih;
+  u16_t inProtocol;
+
+  if(pb->len < sizeof(inProtocol)) {
+    PPPDEBUG((LOG_ERR, "pppInProcOverEthernet: too small for protocol field\n"));
+    goto drop;
+  }
+
+  inProtocol = (((u8_t *)pb->payload)[0] << 8) | ((u8_t*)pb->payload)[1];
+
+  /* make room for pppInputHeader - should not fail */
+  if (pbuf_header(pb, sizeof(*pih) - sizeof(inProtocol)) != 0) {
+    PPPDEBUG((LOG_ERR, "pppInProcOverEthernet: could not allocate room for header\n"));
+    goto drop;
+  }
+
+  pih = pb->payload;
+
+  pih->unit = pd;
+  pih->proto = inProtocol;
+
+  /* Dispatch the packet thereby consuming it. */
+  if(tcpip_callback(pppInput, pb) != ERR_OK) {
+    PPPDEBUG((LOG_ERR, "pppInProcOverEthernet[%d]: tcpip_callback() failed, dropping packet\n", pd));
+    goto drop;
+  }
+
+  return;
+
+drop:
+  LINK_STATS_INC(link.drop);
+  pbuf_free(pb);
+  return;
+}
+#endif /* PPPOE_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp.h
new file mode 100644
index 000000000..d5caa0a7e
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp.h
@@ -0,0 +1,465 @@
+/*****************************************************************************
+* ppp.h - Network Point to Point Protocol header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1997 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 97-11-05 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
+*   Original derived from BSD codes.
+*****************************************************************************/
+
+#ifndef PPP_H
+#define PPP_H
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "lwip/def.h"
+#include "lwip/sio.h"
+#include "lwip/api.h"
+#include "lwip/sockets.h"
+#include "lwip/stats.h"
+#include "lwip/mem.h"
+#include "lwip/tcpip.h"
+#include "lwip/netif.h"
+
+/*
+ * pppd.h - PPP daemon global declarations.
+ *
+ * Copyright (c) 1989 Carnegie Mellon University.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by Carnegie Mellon University.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ */
+/*
+ * ppp_defs.h - PPP definitions.
+ *
+ * Copyright (c) 1994 The Australian National University.
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation is hereby granted, provided that the above copyright
+ * notice appears in all copies.  This software is provided without any
+ * warranty, express or implied. The Australian National University
+ * makes no representations about the suitability of this software for
+ * any purpose.
+ *
+ * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
+ * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
+ * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
+ * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
+ * OR MODIFICATIONS.
+ */
+
+#define TIMEOUT(f, a, t)    sys_untimeout((f), (a)), sys_timeout((t)*1000, (f), (a))
+#define UNTIMEOUT(f, a)     sys_untimeout((f), (a))
+
+
+#ifndef __u_char_defined
+
+/* Type definitions for BSD code. */
+typedef unsigned long  u_long;
+typedef unsigned int   u_int;
+typedef unsigned short u_short;
+typedef unsigned char  u_char;
+
+#endif
+
+/*
+ * Constants and structures defined by the internet system,
+ * Per RFC 790, September 1981, and numerous additions.
+ */
+
+/*
+ * The basic PPP frame.
+ */
+#define PPP_HDRLEN      4       /* octets for standard ppp header */
+#define PPP_FCSLEN      2       /* octets for FCS */
+
+
+/*
+ * Significant octet values.
+ */
+#define PPP_ALLSTATIONS 0xff    /* All-Stations broadcast address */
+#define PPP_UI          0x03    /* Unnumbered Information */
+#define PPP_FLAG        0x7e    /* Flag Sequence */
+#define PPP_ESCAPE      0x7d    /* Asynchronous Control Escape */
+#define PPP_TRANS       0x20    /* Asynchronous transparency modifier */
+
+/*
+ * Protocol field values.
+ */
+#define PPP_IP          0x21    /* Internet Protocol */
+#define PPP_AT          0x29    /* AppleTalk Protocol */
+#define PPP_VJC_COMP    0x2d    /* VJ compressed TCP */
+#define PPP_VJC_UNCOMP  0x2f    /* VJ uncompressed TCP */
+#define PPP_COMP        0xfd    /* compressed packet */
+#define PPP_IPCP        0x8021  /* IP Control Protocol */
+#define PPP_ATCP        0x8029  /* AppleTalk Control Protocol */
+#define PPP_CCP         0x80fd  /* Compression Control Protocol */
+#define PPP_LCP         0xc021  /* Link Control Protocol */
+#define PPP_PAP         0xc023  /* Password Authentication Protocol */
+#define PPP_LQR         0xc025  /* Link Quality Report protocol */
+#define PPP_CHAP        0xc223  /* Cryptographic Handshake Auth. Protocol */
+#define PPP_CBCP        0xc029  /* Callback Control Protocol */
+
+/*
+ * Values for FCS calculations.
+ */
+#define PPP_INITFCS     0xffff  /* Initial FCS value */
+#define PPP_GOODFCS     0xf0b8  /* Good final FCS value */
+#define PPP_FCS(fcs, c) (((fcs) >> 8) ^ fcstab[((fcs) ^ (c)) & 0xff])
+
+/*
+ * Extended asyncmap - allows any character to be escaped.
+ */
+typedef u_char  ext_accm[32];
+
+/*
+ * What to do with network protocol (NP) packets.
+ */
+enum NPmode {
+  NPMODE_PASS,        /* pass the packet through */
+  NPMODE_DROP,        /* silently drop the packet */
+  NPMODE_ERROR,       /* return an error */
+  NPMODE_QUEUE        /* save it up for later. */
+};
+
+/*
+ * Inline versions of get/put char/short/long.
+ * Pointer is advanced; we assume that both arguments
+ * are lvalues and will already be in registers.
+ * cp MUST be u_char *.
+ */
+#define GETCHAR(c, cp) { \
+    (c) = *(cp)++; \
+}
+#define PUTCHAR(c, cp) { \
+    *(cp)++ = (u_char) (c); \
+}
+
+
+#define GETSHORT(s, cp) { \
+    (s) = *(cp); (cp)++; (s) <<= 8; \
+    (s) |= *(cp); (cp)++; \
+}
+#define PUTSHORT(s, cp) { \
+    *(cp)++ = (u_char) ((s) >> 8); \
+    *(cp)++ = (u_char) (s & 0xff); \
+}
+
+#define GETLONG(l, cp) { \
+    (l) = *(cp); (cp)++; (l) <<= 8; \
+    (l) |= *(cp); (cp)++; (l) <<= 8; \
+    (l) |= *(cp); (cp)++; (l) <<= 8; \
+    (l) |= *(cp); (cp)++; \
+}
+#define PUTLONG(l, cp) { \
+    *(cp)++ = (u_char) ((l) >> 24); \
+    *(cp)++ = (u_char) ((l) >> 16); \
+    *(cp)++ = (u_char) ((l) >> 8); \
+    *(cp)++ = (u_char) (l); \
+}
+
+
+#define INCPTR(n, cp)   ((cp) += (n))
+#define DECPTR(n, cp)   ((cp) -= (n))
+
+#define BCMP(s0, s1, l)     memcmp((u_char *)(s0), (u_char *)(s1), (l))
+#define BCOPY(s, d, l)      MEMCPY((d), (s), (l))
+#define BZERO(s, n)         memset(s, 0, n)
+
+#if PPP_DEBUG
+#define PRINTMSG(m, l)  { m[l] = '\0'; ppp_trace(LOG_INFO, "Remote message: %s\n", m); }
+#else  /* PPP_DEBUG */
+#define PRINTMSG(m, l)
+#endif /* PPP_DEBUG */
+
+/*
+ * MAKEHEADER - Add PPP Header fields to a packet.
+ */
+#define MAKEHEADER(p, t) { \
+    PUTCHAR(PPP_ALLSTATIONS, p); \
+    PUTCHAR(PPP_UI, p); \
+    PUTSHORT(t, p); }
+
+/*************************
+*** PUBLIC DEFINITIONS ***
+*************************/
+
+/* Error codes. */
+#define PPPERR_NONE      0 /* No error. */
+#define PPPERR_PARAM    -1 /* Invalid parameter. */
+#define PPPERR_OPEN     -2 /* Unable to open PPP session. */
+#define PPPERR_DEVICE   -3 /* Invalid I/O device for PPP. */
+#define PPPERR_ALLOC    -4 /* Unable to allocate resources. */
+#define PPPERR_USER     -5 /* User interrupt. */
+#define PPPERR_CONNECT  -6 /* Connection lost. */
+#define PPPERR_AUTHFAIL -7 /* Failed authentication challenge. */
+#define PPPERR_PROTOCOL -8 /* Failed to meet protocol. */
+
+/*
+ * PPP IOCTL commands.
+ */
+/*
+ * Get the up status - 0 for down, non-zero for up.  The argument must
+ * point to an int.
+ */
+#define PPPCTLG_UPSTATUS 100 /* Get the up status - 0 down else up */
+#define PPPCTLS_ERRCODE  101 /* Set the error code */
+#define PPPCTLG_ERRCODE  102 /* Get the error code */
+#define PPPCTLG_FD       103 /* Get the fd associated with the ppp */
+
+/************************
+*** PUBLIC DATA TYPES ***
+************************/
+
+/*
+ * The following struct gives the addresses of procedures to call
+ * for a particular protocol.
+ */
+struct protent {
+    u_short protocol;       /* PPP protocol number */
+    /* Initialization procedure */
+    void (*init) (int unit);
+    /* Process a received packet */
+    void (*input) (int unit, u_char *pkt, int len);
+    /* Process a received protocol-reject */
+    void (*protrej) (int unit);
+    /* Lower layer has come up */
+    void (*lowerup) (int unit);
+    /* Lower layer has gone down */
+    void (*lowerdown) (int unit);
+    /* Open the protocol */
+    void (*open) (int unit);
+    /* Close the protocol */
+    void (*close) (int unit, char *reason);
+#if 0
+    /* Print a packet in readable form */
+    int  (*printpkt) (u_char *pkt, int len,
+              void (*printer) (void *, char *, ...),
+              void *arg);
+    /* Process a received data packet */
+    void (*datainput) (int unit, u_char *pkt, int len);
+#endif
+    int  enabled_flag;      /* 0 iff protocol is disabled */
+    char *name;         /* Text name of protocol */
+#if 0
+    /* Check requested options, assign defaults */
+    void (*check_options) (u_long);
+    /* Configure interface for demand-dial */
+    int  (*demand_conf) (int unit);
+    /* Say whether to bring up link for this pkt */
+    int  (*active_pkt) (u_char *pkt, int len);
+#endif
+};
+
+/*
+ * The following structure records the time in seconds since
+ * the last NP packet was sent or received.
+ */
+struct ppp_idle {
+  u_short xmit_idle;      /* seconds since last NP packet sent */
+  u_short recv_idle;      /* seconds since last NP packet received */
+};
+
+struct ppp_settings {
+
+  u_int  disable_defaultip : 1;       /* Don't use hostname for default IP addrs */
+  u_int  auth_required     : 1;       /* Peer is required to authenticate */
+  u_int  explicit_remote   : 1;       /* remote_name specified with remotename opt */
+  u_int  refuse_pap        : 1;       /* Don't wanna auth. ourselves with PAP */
+  u_int  refuse_chap       : 1;       /* Don't wanna auth. ourselves with CHAP */
+  u_int  usehostname       : 1;       /* Use hostname for our_name */
+  u_int  usepeerdns        : 1;       /* Ask peer for DNS adds */
+
+  u_short idle_time_limit;            /* Shut down link if idle for this long */
+  int  maxconnect;                    /* Maximum connect time (seconds) */
+
+  char user       [MAXNAMELEN   + 1]; /* Username for PAP */
+  char passwd     [MAXSECRETLEN + 1]; /* Password for PAP, secret for CHAP */
+  char our_name   [MAXNAMELEN   + 1]; /* Our name for authentication purposes */
+  char remote_name[MAXNAMELEN   + 1]; /* Peer's name for authentication */
+};
+
+struct ppp_addrs {
+  struct ip_addr our_ipaddr, his_ipaddr, netmask, dns1, dns2;
+};
+
+/*****************************
+*** PUBLIC DATA STRUCTURES ***
+*****************************/
+
+/* Buffers for outgoing packets. */
+extern u_char *outpacket_buf[NUM_PPP];
+
+extern struct ppp_settings ppp_settings;
+
+extern struct protent *ppp_protocols[]; /* Table of pointers to supported protocols */
+
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+
+/* Initialize the PPP subsystem. */
+err_t pppInit(void);
+
+/* Warning: Using PPPAUTHTYPE_ANY might have security consequences.
+ * RFC 1994 says:
+ *
+ * In practice, within or associated with each PPP server, there is a
+ * database which associates "user" names with authentication
+ * information ("secrets").  It is not anticipated that a particular
+ * named user would be authenticated by multiple methods.  This would
+ * make the user vulnerable to attacks which negotiate the least secure
+ * method from among a set (such as PAP rather than CHAP).  If the same
+ * secret was used, PAP would reveal the secret to be used later with
+ * CHAP.
+ *
+ * Instead, for each user name there should be an indication of exactly
+ * one method used to authenticate that user name.  If a user needs to
+ * make use of different authentication methods under different
+ * circumstances, then distinct user names SHOULD be employed, each of
+ * which identifies exactly one authentication method.
+ *
+ */
+enum pppAuthType {
+    PPPAUTHTYPE_NONE,
+    PPPAUTHTYPE_ANY,
+    PPPAUTHTYPE_PAP,
+    PPPAUTHTYPE_CHAP
+};
+
+void pppSetAuth(enum pppAuthType authType, const char *user, const char *passwd);
+
+/*
+ * Open a new PPP connection using the given serial I/O device.
+ * This initializes the PPP control block but does not
+ * attempt to negotiate the LCP session.
+ * Return a new PPP connection descriptor on success or
+ * an error code (negative) on failure. 
+ */
+int pppOverSerialOpen(sio_fd_t fd, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx);
+
+/*
+ * Open a new PPP Over Ethernet (PPPOE) connection.
+ */
+int pppOverEthernetOpen(struct netif *ethif, const char *service_name, const char *concentrator_name, void (*linkStatusCB)(void *ctx, int errCode, void *arg), void *linkStatusCtx);
+
+/* for source code compatibility */
+#define pppOpen(fd,cb,ls) pppOverSerialOpen(fd,cb,ls)
+
+/*
+ * Close a PPP connection and release the descriptor. 
+ * Any outstanding packets in the queues are dropped.
+ * Return 0 on success, an error code on failure. 
+ */
+int pppClose(int pd);
+
+/*
+ * Indicate to the PPP process that the line has disconnected.
+ */
+void pppSigHUP(int pd);
+
+/*
+ * Get and set parameters for the given connection.
+ * Return 0 on success, an error code on failure. 
+ */
+int  pppIOCtl(int pd, int cmd, void *arg);
+
+/*
+ * Return the Maximum Transmission Unit for the given PPP connection.
+ */
+u_int pppMTU(int pd);
+
+/*
+ * Write n characters to a ppp link.
+ * RETURN: >= 0 Number of characters written, -1 Failed to write to device.
+ */
+int pppWrite(int pd, const u_char *s, int n);
+
+void pppInProcOverEthernet(int pd, struct pbuf *pb);
+
+struct pbuf *pppSingleBuf(struct pbuf *p);
+
+void pppLinkTerminated(int pd);
+
+void pppLinkDown(int pd);
+
+void pppMainWakeup(int pd);
+
+/* Configure i/f transmit parameters */
+void ppp_send_config (int, int, u32_t, int, int);
+/* Set extended transmit ACCM */
+void ppp_set_xaccm (int, ext_accm *);
+/* Configure i/f receive parameters */
+void ppp_recv_config (int, int, u32_t, int, int);
+/* Find out how long link has been idle */
+int  get_idle_time (int, struct ppp_idle *);
+
+/* Configure VJ TCP header compression */
+int  sifvjcomp (int, int, int, int);
+/* Configure i/f down (for IP) */
+int  sifup (int);
+/* Set mode for handling packets for proto */
+int  sifnpmode (int u, int proto, enum NPmode mode);
+/* Configure i/f down (for IP) */
+int  sifdown (int);
+/* Configure IP addresses for i/f */
+int  sifaddr (int, u32_t, u32_t, u32_t, u32_t, u32_t);
+/* Reset i/f IP addresses */
+int  cifaddr (int, u32_t, u32_t);
+/* Create default route through i/f */
+int  sifdefaultroute (int, u32_t, u32_t);
+/* Delete default route through i/f */
+int  cifdefaultroute (int, u32_t, u32_t);
+
+/* Get appropriate netmask for address */
+u32_t GetMask (u32_t); 
+
+#endif /* PPP_SUPPORT */
+
+#endif /* PPP_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp_oe.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp_oe.c
new file mode 100644
index 000000000..c34c529b6
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/ppp_oe.c
@@ -0,0 +1,1227 @@
+/*****************************************************************************
+* ppp_oe.c - PPP Over Ethernet implementation for lwIP.
+*
+* Copyright (c) 2006 by Marc Boucher, Services Informatiques (MBSI) inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 06-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+*****************************************************************************/
+
+
+
+/* based on NetBSD: if_pppoe.c,v 1.64 2006/01/31 23:50:15 martin Exp */
+
+/*-
+ * Copyright (c) 2002 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Martin Husemann <martin@NetBSD.org>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *        This product includes software developed by the NetBSD
+ *        Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "lwip/opt.h"
+
+#if PPPOE_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "lwip/sys.h"
+
+#include "netif/ppp_oe.h"
+#include "netif/etharp.h"
+
+#include <string.h>
+#include <stdio.h>
+
+/** @todo Replace this part with a simple list like other lwIP lists */
+#ifndef _SYS_QUEUE_H_
+#define _SYS_QUEUE_H_
+
+/*
+ * A list is headed by a single forward pointer (or an array of forward
+ * pointers for a hash table header). The elements are doubly linked
+ * so that an arbitrary element can be removed without a need to
+ * traverse the list. New elements can be added to the list before
+ * or after an existing element or at the head of the list. A list
+ * may only be traversed in the forward direction.
+ *
+ * For details on the use of these macros, see the queue(3) manual page.
+ */
+
+/*
+ * List declarations.
+ */
+#define  LIST_HEAD(name, type)                                                 \
+struct name {                                                                  \
+  struct type *lh_first;  /* first element */                                  \
+}
+
+#define  LIST_HEAD_INITIALIZER(head)                                           \
+  { NULL }
+
+#define  LIST_ENTRY(type)                                                      \
+struct {                                                                       \
+  struct type *le_next;  /* next element */                                    \
+  struct type **le_prev; /* address of previous next element */                \
+}
+
+/*
+ * List functions.
+ */
+
+#define  LIST_EMPTY(head)  ((head)->lh_first == NULL)
+
+#define  LIST_FIRST(head)  ((head)->lh_first)
+
+#define  LIST_FOREACH(var, head, field)                                        \
+  for ((var) = LIST_FIRST((head));                                             \
+      (var);                                                                   \
+      (var) = LIST_NEXT((var), field))
+
+#define  LIST_INIT(head) do {                                                  \
+  LIST_FIRST((head)) = NULL;                                                   \
+} while (0)
+
+#define  LIST_INSERT_AFTER(listelm, elm, field) do {                           \
+  if ((LIST_NEXT((elm), field) = LIST_NEXT((listelm), field)) != NULL)         \
+    LIST_NEXT((listelm), field)->field.le_prev =                               \
+        &LIST_NEXT((elm), field);                                              \
+  LIST_NEXT((listelm), field) = (elm);                                         \
+  (elm)->field.le_prev = &LIST_NEXT((listelm), field);                         \
+} while (0)
+
+#define  LIST_INSERT_BEFORE(listelm, elm, field) do {                          \
+  (elm)->field.le_prev = (listelm)->field.le_prev;                             \
+  LIST_NEXT((elm), field) = (listelm);                                         \
+  *(listelm)->field.le_prev = (elm);                                           \
+  (listelm)->field.le_prev = &LIST_NEXT((elm), field);                         \
+} while (0)
+
+#define  LIST_INSERT_HEAD(head, elm, field) do {                               \
+  if ((LIST_NEXT((elm), field) = LIST_FIRST((head))) != NULL)                  \
+    LIST_FIRST((head))->field.le_prev = &LIST_NEXT((elm), field);              \
+  LIST_FIRST((head)) = (elm);                                                  \
+  (elm)->field.le_prev = &LIST_FIRST((head));                                  \
+} while (0)
+
+#define  LIST_NEXT(elm, field)  ((elm)->field.le_next)
+
+#define  LIST_REMOVE(elm, field) do {                                          \
+  if (LIST_NEXT((elm), field) != NULL)                                         \
+    LIST_NEXT((elm), field)->field.le_prev =                                   \
+        (elm)->field.le_prev;                                                  \
+  *(elm)->field.le_prev = LIST_NEXT((elm), field);                             \
+} while (0)
+
+#endif /* !_SYS_QUEUE_H_ */
+
+
+/* Add a 16 bit unsigned value to a buffer pointed to by PTR */
+#define PPPOE_ADD_16(PTR, VAL) \
+    *(PTR)++ = (VAL) / 256;    \
+    *(PTR)++ = (VAL) % 256
+
+/* Add a complete PPPoE header to the buffer pointed to by PTR */
+#define PPPOE_ADD_HEADER(PTR, CODE, SESS, LEN)  \
+    *(PTR)++ = PPPOE_VERTYPE;  \
+    *(PTR)++ = (CODE);         \
+    PPPOE_ADD_16(PTR, SESS);   \
+    PPPOE_ADD_16(PTR, LEN)
+
+#define PPPOE_DISC_TIMEOUT (5*1000)  /* base for quick timeout calculation */
+#define PPPOE_SLOW_RETRY   (60*1000) /* persistent retry interval */
+#define PPPOE_DISC_MAXPADI  4        /* retry PADI four times (quickly) */
+#define PPPOE_DISC_MAXPADR  2        /* retry PADR twice */
+
+#ifdef PPPOE_SERVER
+/* from if_spppsubr.c */
+#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
+#endif
+
+struct pppoe_softc {
+  LIST_ENTRY(pppoe_softc) sc_list;
+  struct netif *sc_ethif;      /* ethernet interface we are using */
+  int sc_pd;                   /* ppp unit number */
+  void (*sc_linkStatusCB)(int pd, int up);
+
+  int sc_state;                /* discovery phase or session connected */
+  struct eth_addr sc_dest;     /* hardware address of concentrator */
+  u16_t sc_session;            /* PPPoE session id */
+
+  char *sc_service_name;       /* if != NULL: requested name of service */
+  char *sc_concentrator_name;  /* if != NULL: requested concentrator id */
+  u8_t *sc_ac_cookie;          /* content of AC cookie we must echo back */
+  size_t sc_ac_cookie_len;     /* length of cookie data */
+#ifdef PPPOE_SERVER
+  u8_t *sc_hunique;            /* content of host unique we must echo back */
+  size_t sc_hunique_len;       /* length of host unique */
+#endif
+  int sc_padi_retried;         /* number of PADI retries already done */
+  int sc_padr_retried;         /* number of PADR retries already done */
+};
+
+/* input routines */
+static void pppoe_dispatch_disc_pkt(struct netif *, struct pbuf *);
+
+/* management routines */
+static int pppoe_do_disconnect(struct pppoe_softc *);
+static void pppoe_abort_connect(struct pppoe_softc *);
+static void pppoe_clear_softc(struct pppoe_softc *, const char *);
+
+/* internal timeout handling */
+static void pppoe_timeout(void *);
+
+/* sending actual protocol controll packets */
+static err_t pppoe_send_padi(struct pppoe_softc *);
+static err_t pppoe_send_padr(struct pppoe_softc *);
+#ifdef PPPOE_SERVER
+static err_t pppoe_send_pado(struct pppoe_softc *);
+static err_t pppoe_send_pads(struct pppoe_softc *);
+#endif
+static err_t pppoe_send_padt(struct netif *, u_int, const u8_t *);
+
+/* internal helper functions */
+static struct pppoe_softc * pppoe_find_softc_by_session(u_int, struct netif *);
+static struct pppoe_softc * pppoe_find_softc_by_hunique(u8_t *, size_t, struct netif *);
+
+static LIST_HEAD(pppoe_softc_head, pppoe_softc) pppoe_softc_list;
+
+int pppoe_hdrlen;
+
+void
+pppoe_init(void)
+{
+  pppoe_hdrlen = sizeof(struct eth_hdr) + PPPOE_HEADERLEN;
+  LIST_INIT(&pppoe_softc_list);
+}
+
+err_t
+pppoe_create(struct netif *ethif, int pd, void (*linkStatusCB)(int pd, int up), struct pppoe_softc **scptr)
+{
+  struct pppoe_softc *sc;
+
+  sc = mem_malloc(sizeof(struct pppoe_softc));
+  if(!sc) {
+    *scptr = NULL;
+    return ERR_MEM;
+  }
+  memset(sc, 0, sizeof(struct pppoe_softc));
+
+  /* changed to real address later */
+  MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
+
+  sc->sc_pd = pd;
+  sc->sc_linkStatusCB = linkStatusCB;
+  sc->sc_ethif = ethif;
+
+  LIST_INSERT_HEAD(&pppoe_softc_list, sc, sc_list);
+
+  *scptr = sc;
+
+  return ERR_OK;
+}
+
+err_t
+pppoe_destroy(struct netif *ifp)
+{
+  struct pppoe_softc * sc;
+
+  LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
+    if (sc->sc_ethif == ifp) {
+      break;
+    }
+  }
+
+  if(!(sc && (sc->sc_ethif == ifp))) {
+    return ERR_IF;
+  }
+
+  tcpip_untimeout(pppoe_timeout, sc);
+  LIST_REMOVE(sc, sc_list);
+
+  if (sc->sc_concentrator_name) {
+    mem_free(sc->sc_concentrator_name);
+  }
+  if (sc->sc_service_name) {
+    mem_free(sc->sc_service_name);
+  }
+  if (sc->sc_ac_cookie) {
+    mem_free(sc->sc_ac_cookie);
+  }
+  mem_free(sc);
+
+  return ERR_OK;
+}
+
+/*
+ * Find the interface handling the specified session.
+ * Note: O(number of sessions open), this is a client-side only, mean
+ * and lean implementation, so number of open sessions typically should
+ * be 1.
+ */
+static struct pppoe_softc *
+pppoe_find_softc_by_session(u_int session, struct netif *rcvif)
+{
+  struct pppoe_softc *sc;
+
+  if (session == 0) {
+    return NULL;
+  }
+
+  LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
+    if (sc->sc_state == PPPOE_STATE_SESSION
+        && sc->sc_session == session) {
+      if (sc->sc_ethif == rcvif) {
+        return sc;
+      } else {
+        return NULL;
+      }
+    }
+  }
+  return NULL;
+}
+
+/* Check host unique token passed and return appropriate softc pointer,
+ * or NULL if token is bogus. */
+static struct pppoe_softc *
+pppoe_find_softc_by_hunique(u8_t *token, size_t len, struct netif *rcvif)
+{
+  struct pppoe_softc *sc, *t;
+
+  if (LIST_EMPTY(&pppoe_softc_list)) {
+    return NULL;
+  }
+
+  if (len != sizeof sc) {
+    return NULL;
+  }
+  MEMCPY(&t, token, len);
+
+  LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
+    if (sc == t) {
+      break;
+    }
+  }
+
+  if (sc == NULL) {
+    PPPDEBUG((LOG_DEBUG, "pppoe: alien host unique tag, no session found\n"));
+    return NULL;
+  }
+
+  /* should be safe to access *sc now */
+  if (sc->sc_state < PPPOE_STATE_PADI_SENT || sc->sc_state >= PPPOE_STATE_SESSION) {
+    printf("%c%c%"U16_F": host unique tag found, but it belongs to a connection in state %d\n",
+      sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_state);
+    return NULL;
+  }
+  if (sc->sc_ethif != rcvif) {
+    printf("%c%c%"U16_F": wrong interface, not accepting host unique\n",
+      sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+    return NULL;
+  }
+  return sc;
+}
+
+static void
+pppoe_linkstatus_up(void *arg)
+{
+  struct pppoe_softc *sc = (struct pppoe_softc*)arg;
+
+  sc->sc_linkStatusCB(sc->sc_pd, 1);
+}
+
+/* analyze and handle a single received packet while not in session state */
+static void
+pppoe_dispatch_disc_pkt(struct netif *netif, struct pbuf *pb)
+{
+  u16_t tag, len;
+  u16_t session, plen;
+  struct pppoe_softc *sc;
+  const char *err_msg;
+  char devname[6];
+  char *error;
+  u8_t *ac_cookie;
+  size_t ac_cookie_len;
+#ifdef PPPOE_SERVER
+  u8_t *hunique;
+  size_t hunique_len;
+#endif
+  struct pppoehdr *ph;
+  struct pppoetag pt;
+  int off = 0, err, errortag;
+  struct eth_hdr *ethhdr;
+
+  pb = pppSingleBuf(pb);
+
+  strcpy(devname, "pppoe");  /* as long as we don't know which instance */
+  err_msg = NULL;
+  errortag = 0;
+  if (pb->len < sizeof(*ethhdr)) {
+    goto done;
+  }
+  ethhdr = (struct eth_hdr *)pb->payload;
+  off += sizeof(*ethhdr);
+
+  ac_cookie = NULL;
+  ac_cookie_len = 0;
+#ifdef PPPOE_SERVER
+  hunique = NULL;
+  hunique_len = 0;
+#endif
+  session = 0;
+  if (pb->len - off <= PPPOE_HEADERLEN) {
+    printf("pppoe: packet too short: %d\n", pb->len);
+    goto done;
+  }
+
+  ph = (struct pppoehdr *) (ethhdr + 1);
+  if (ph->vertype != PPPOE_VERTYPE) {
+    printf("pppoe: unknown version/type packet: 0x%x\n", ph->vertype);
+    goto done;
+  }
+  session = ntohs(ph->session);
+  plen = ntohs(ph->plen);
+  off += sizeof(*ph);
+
+  if (plen + off > pb->len) {
+    printf("pppoe: packet content does not fit: data available = %d, packet size = %u\n",
+        pb->len - off, plen);
+    goto done;
+  }
+  if(pb->tot_len == pb->len) {
+    pb->tot_len = pb->len = off + plen; /* ignore trailing garbage */
+  }
+  tag = 0;
+  len = 0;
+  sc = NULL;
+  while (off + sizeof(pt) <= pb->len) {
+    MEMCPY(&pt, (u8_t*)pb->payload + off, sizeof(pt));
+    tag = ntohs(pt.tag);
+    len = ntohs(pt.len);
+    if (off + sizeof(pt) + len > pb->len) {
+      printf("pppoe: tag 0x%x len 0x%x is too long\n", tag, len);
+      goto done;
+    }
+    switch (tag) {
+      case PPPOE_TAG_EOL:
+        goto breakbreak;
+      case PPPOE_TAG_SNAME:
+        break;  /* ignored */
+      case PPPOE_TAG_ACNAME:
+        break;  /* ignored */
+      case PPPOE_TAG_HUNIQUE:
+        if (sc != NULL) {
+          break;
+        }
+#ifdef PPPOE_SERVER
+        hunique = (u8_t*)pb->payload + off + sizeof(pt);
+        hunique_len = len;
+#endif
+        sc = pppoe_find_softc_by_hunique((u8_t*)pb->payload + off + sizeof(pt), len, netif);
+        if (sc != NULL) {
+          snprintf(devname, sizeof(devname), "%c%c%"U16_F, sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+        }
+        break;
+      case PPPOE_TAG_ACCOOKIE:
+        if (ac_cookie == NULL) {
+          ac_cookie = (u8_t*)pb->payload + off + sizeof(pt);
+          ac_cookie_len = len;
+        }
+        break;
+      case PPPOE_TAG_SNAME_ERR:
+        err_msg = "SERVICE NAME ERROR";
+        errortag = 1;
+        break;
+      case PPPOE_TAG_ACSYS_ERR:
+        err_msg = "AC SYSTEM ERROR";
+        errortag = 1;
+        break;
+      case PPPOE_TAG_GENERIC_ERR:
+        err_msg = "GENERIC ERROR";
+        errortag = 1;
+        break;
+    }
+    if (err_msg) {
+      error = NULL;
+      if (errortag && len) {
+        error = mem_malloc(len+1);
+        if (error) {
+          strncpy(error, (char*)pb->payload + off + sizeof(pt), len);
+          error[len-1] = '\0';
+        }
+      }
+      if (error) {
+        printf("%s: %s: %s\n", devname, err_msg, error);
+        mem_free(error);
+      } else {
+        printf("%s: %s\n", devname, err_msg);
+      }
+      if (errortag) {
+        goto done;
+      }
+    }
+    off += sizeof(pt) + len;
+  }
+
+breakbreak:;
+  switch (ph->code) {
+    case PPPOE_CODE_PADI:
+#ifdef PPPOE_SERVER
+      /*
+       * got service name, concentrator name, and/or host unique.
+       * ignore if we have no interfaces with IFF_PASSIVE|IFF_UP.
+       */
+      if (LIST_EMPTY(&pppoe_softc_list)) {
+        goto done;
+      }
+      LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
+        if (!(sc->sc_sppp.pp_if.if_flags & IFF_UP)) {
+          continue;
+        }
+        if (!(sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
+          continue;
+        }
+        if (sc->sc_state == PPPOE_STATE_INITIAL) {
+          break;
+        }
+      }
+      if (sc == NULL) {
+        /* printf("pppoe: free passive interface is not found\n"); */
+        goto done;
+      }
+      if (hunique) {
+        if (sc->sc_hunique) {
+          mem_free(sc->sc_hunique);
+        }
+        sc->sc_hunique = mem_malloc(hunique_len);
+        if (sc->sc_hunique == NULL) {
+          goto done;
+        }
+        sc->sc_hunique_len = hunique_len;
+        MEMCPY(sc->sc_hunique, hunique, hunique_len);
+      }
+      MEMCPY(&sc->sc_dest, eh->ether_shost, sizeof sc->sc_dest);
+      sc->sc_state = PPPOE_STATE_PADO_SENT;
+      pppoe_send_pado(sc);
+      break;
+  #endif /* PPPOE_SERVER */
+    case PPPOE_CODE_PADR:
+  #ifdef PPPOE_SERVER
+      /*
+       * get sc from ac_cookie if IFF_PASSIVE
+       */
+      if (ac_cookie == NULL) {
+        /* be quiet if there is not a single pppoe instance */
+        printf("pppoe: received PADR but not includes ac_cookie\n");
+        goto done;
+      }
+      sc = pppoe_find_softc_by_hunique(ac_cookie, ac_cookie_len, netif);
+      if (sc == NULL) {
+        /* be quiet if there is not a single pppoe instance */
+        if (!LIST_EMPTY(&pppoe_softc_list)) {
+          printf("pppoe: received PADR but could not find request for it\n");
+        }
+        goto done;
+      }
+      if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
+        printf("%c%c%"U16_F": received unexpected PADR\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+        goto done;
+      }
+      if (hunique) {
+        if (sc->sc_hunique) {
+          mem_free(sc->sc_hunique);
+        }
+        sc->sc_hunique = mem_malloc(hunique_len);
+        if (sc->sc_hunique == NULL) {
+          goto done;
+        }
+        sc->sc_hunique_len = hunique_len;
+        MEMCPY(sc->sc_hunique, hunique, hunique_len);
+      }
+      pppoe_send_pads(sc);
+      sc->sc_state = PPPOE_STATE_SESSION;
+      tcpip_timeout (100, pppoe_linkstatus_up, sc); /* notify upper layers */
+      break;
+  #else
+      /* ignore, we are no access concentrator */
+      goto done;
+  #endif /* PPPOE_SERVER */
+    case PPPOE_CODE_PADO:
+      if (sc == NULL) {
+        /* be quiet if there is not a single pppoe instance */
+        if (!LIST_EMPTY(&pppoe_softc_list)) {
+          printf("pppoe: received PADO but could not find request for it\n");
+        }
+        goto done;
+      }
+      if (sc->sc_state != PPPOE_STATE_PADI_SENT) {
+        printf("%c%c%"U16_F": received unexpected PADO\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+        goto done;
+      }
+      if (ac_cookie) {
+        if (sc->sc_ac_cookie) {
+          mem_free(sc->sc_ac_cookie);
+        }
+        sc->sc_ac_cookie = mem_malloc(ac_cookie_len);
+        if (sc->sc_ac_cookie == NULL) {
+          goto done;
+        }
+        sc->sc_ac_cookie_len = ac_cookie_len;
+        MEMCPY(sc->sc_ac_cookie, ac_cookie, ac_cookie_len);
+      }
+      MEMCPY(&sc->sc_dest, ethhdr->src.addr, sizeof(sc->sc_dest.addr));
+      tcpip_untimeout(pppoe_timeout, sc);
+      sc->sc_padr_retried = 0;
+      sc->sc_state = PPPOE_STATE_PADR_SENT;
+      if ((err = pppoe_send_padr(sc)) != 0) {
+        PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADR, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
+      }
+      tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
+      break;
+    case PPPOE_CODE_PADS:
+      if (sc == NULL) {
+        goto done;
+      }
+      sc->sc_session = session;
+      tcpip_untimeout(pppoe_timeout, sc);
+      PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": session 0x%x connected\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, session));
+      sc->sc_state = PPPOE_STATE_SESSION;
+      tcpip_timeout (100, pppoe_linkstatus_up, sc); /* notify upper layers */
+      break;
+    case PPPOE_CODE_PADT:
+      if (sc == NULL) {
+        goto done;
+      }
+      pppoe_clear_softc(sc, "received PADT");
+      break;
+    default:
+      if(sc) {
+        printf("%c%c%"U16_F": unknown code (0x%04x) session = 0x%04x\n",
+            sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
+            ph->code, session);
+      } else {
+        printf("pppoe: unknown code (0x%04x) session = 0x%04x\n", ph->code, session);
+      }
+      break;
+  }
+
+done:
+  pbuf_free(pb);
+  return;
+}
+
+void
+pppoe_disc_input(struct netif *netif, struct pbuf *p)
+{
+  /* avoid error messages if there is not a single pppoe instance */
+  if (!LIST_EMPTY(&pppoe_softc_list)) {
+    pppoe_dispatch_disc_pkt(netif, p);
+  } else {
+    pbuf_free(p);
+  }
+}
+
+void
+pppoe_data_input(struct netif *netif, struct pbuf *pb)
+{
+  u16_t session, plen;
+  struct pppoe_softc *sc;
+  struct pppoehdr *ph;
+#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
+  u8_t shost[ETHER_ADDR_LEN];
+#endif
+
+#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
+  MEMCPY(shost, ((struct eth_hdr *)pb->payload)->src.addr, sizeof(shost));
+#endif
+  if (pbuf_header(pb, -(int)sizeof(struct eth_hdr)) != 0) {
+    /* bail out */
+    PPPDEBUG((LOG_ERR, "pppoe_data_input: pbuf_header failed\n"));
+    LINK_STATS_INC(link.lenerr);
+    goto drop;
+  } 
+
+  pb = pppSingleBuf (pb);
+
+  if (pb->len <= PPPOE_HEADERLEN) {
+    printf("pppoe (data): dropping too short packet: %d bytes\n", pb->len);
+    goto drop;
+  }
+
+  if (pb->len < sizeof(*ph)) {
+    printf("pppoe_data_input: could not get PPPoE header\n");
+    goto drop;
+  }
+  ph = (struct pppoehdr *)pb->payload;
+
+  if (ph->vertype != PPPOE_VERTYPE) {
+    printf("pppoe (data): unknown version/type packet: 0x%x\n", ph->vertype);
+    goto drop;
+  }
+  if (ph->code != 0) {
+    goto drop;
+  }
+
+  session = ntohs(ph->session);
+  sc = pppoe_find_softc_by_session(session, netif);
+  if (sc == NULL) {
+#ifdef PPPOE_TERM_UNKNOWN_SESSIONS
+    printf("pppoe: input for unknown session 0x%x, sending PADT\n", session);
+    pppoe_send_padt(netif, session, shost);
+#endif
+    goto drop;
+  }
+
+  plen = ntohs(ph->plen);
+
+  if (pbuf_header(pb, -(int)(PPPOE_HEADERLEN)) != 0) {
+    /* bail out */
+    PPPDEBUG((LOG_ERR, "pppoe_data_input: pbuf_header PPPOE_HEADERLEN failed\n"));
+    LINK_STATS_INC(link.lenerr);
+    goto drop;
+  } 
+
+  PPPDEBUG((LOG_DEBUG, "pppoe_data_input: %c%c%"U16_F": pkthdr.len=%d, pppoe.len=%d\n",
+        sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num,
+        pb->len, plen));
+
+  if (pb->len < plen) {
+    goto drop;
+  }
+
+  pppInProcOverEthernet(sc->sc_pd, pb);
+
+  return;
+
+drop:
+  pbuf_free(pb);
+}
+
+static err_t
+pppoe_output(struct pppoe_softc *sc, struct pbuf *pb)
+{
+  struct eth_hdr *ethhdr;
+  u16_t etype;
+  err_t res;
+
+  if (!sc->sc_ethif) {
+    pbuf_free(pb);
+    return ERR_IF;
+  }
+
+  ethhdr = (struct eth_hdr *)pb->payload;
+  etype = sc->sc_state == PPPOE_STATE_SESSION ? ETHTYPE_PPPOE : ETHTYPE_PPPOEDISC;
+  ethhdr->type = htons(etype);
+  MEMCPY(ethhdr->dest.addr, sc->sc_dest.addr, sizeof(ethhdr->dest.addr));
+  MEMCPY(ethhdr->src.addr, ((struct eth_addr *)sc->sc_ethif->hwaddr)->addr, sizeof(ethhdr->src.addr));
+
+  PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F" (%x) state=%d, session=0x%x output -> %02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F":%02"X16_F", len=%d\n",
+      sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, etype,
+      sc->sc_state, sc->sc_session,
+      sc->sc_dest.addr[0], sc->sc_dest.addr[1], sc->sc_dest.addr[2], sc->sc_dest.addr[3], sc->sc_dest.addr[4], sc->sc_dest.addr[5],
+      pb->tot_len));
+
+  res = sc->sc_ethif->linkoutput(sc->sc_ethif, pb);
+
+  pbuf_free(pb);
+
+  return res;
+}
+
+static err_t
+pppoe_send_padi(struct pppoe_softc *sc)
+{
+  struct pbuf *pb;
+  u8_t *p;
+  int len, l1 = 0, l2 = 0; /* XXX: gcc */
+
+  if (sc->sc_state >PPPOE_STATE_PADI_SENT) {
+    PPPDEBUG((LOG_ERR, "ERROR: pppoe_send_padi in state %d", sc->sc_state));
+  }
+
+  /* calculate length of frame (excluding ethernet header + pppoe header) */
+  len = 2 + 2 + 2 + 2 + sizeof sc;  /* service name tag is required, host unique is send too */
+  if (sc->sc_service_name != NULL) {
+    l1 = strlen(sc->sc_service_name);
+    len += l1;
+  }
+  if (sc->sc_concentrator_name != NULL) {
+    l2 = strlen(sc->sc_concentrator_name);
+    len += 2 + 2 + l2;
+  }
+
+  /* allocate a buffer */
+  pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
+  if (!pb) {
+    return ERR_MEM;
+  }
+
+  p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
+  /* fill in pkt */
+  PPPOE_ADD_HEADER(p, PPPOE_CODE_PADI, 0, len);
+  PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
+  if (sc->sc_service_name != NULL) {
+    PPPOE_ADD_16(p, l1);
+    MEMCPY(p, sc->sc_service_name, l1);
+    p += l1;
+  } else {
+    PPPOE_ADD_16(p, 0);
+  }
+  if (sc->sc_concentrator_name != NULL) {
+    PPPOE_ADD_16(p, PPPOE_TAG_ACNAME);
+    PPPOE_ADD_16(p, l2);
+    MEMCPY(p, sc->sc_concentrator_name, l2);
+    p += l2;
+  }
+  PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
+  PPPOE_ADD_16(p, sizeof(sc));
+  MEMCPY(p, &sc, sizeof sc);
+
+  /* send pkt */
+  return pppoe_output(sc, pb);
+}
+
+static void
+pppoe_timeout(void *arg)
+{
+  int retry_wait, err;
+  struct pppoe_softc *sc = (struct pppoe_softc*)arg;
+
+  PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": timeout\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
+
+  switch (sc->sc_state) {
+    case PPPOE_STATE_PADI_SENT:
+      /*
+       * We have two basic ways of retrying:
+       *  - Quick retry mode: try a few times in short sequence
+       *  - Slow retry mode: we already had a connection successfully
+       *    established and will try infinitely (without user
+       *    intervention)
+       * We only enter slow retry mode if IFF_LINK1 (aka autodial)
+       * is not set.
+       */
+
+      /* initialize for quick retry mode */
+      retry_wait = PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried);
+
+      sc->sc_padi_retried++;
+      if (sc->sc_padi_retried >= PPPOE_DISC_MAXPADI) {
+#if 0
+        if ((sc->sc_sppp.pp_if.if_flags & IFF_LINK1) == 0) {
+          /* slow retry mode */
+          retry_wait = PPPOE_SLOW_RETRY;
+        } else
+#endif
+        {
+          pppoe_abort_connect(sc);
+          return;
+        }
+      }
+      if ((err = pppoe_send_padi(sc)) != 0) {
+        sc->sc_padi_retried--;
+        PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to transmit PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
+      }
+      tcpip_timeout(retry_wait, pppoe_timeout, sc);
+      break;
+
+    case PPPOE_STATE_PADR_SENT:
+      sc->sc_padr_retried++;
+      if (sc->sc_padr_retried >= PPPOE_DISC_MAXPADR) {
+        MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
+        sc->sc_state = PPPOE_STATE_PADI_SENT;
+        sc->sc_padr_retried = 0;
+        if ((err = pppoe_send_padi(sc)) != 0) {
+          PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
+        }
+        tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padi_retried), pppoe_timeout, sc);
+        return;
+      }
+      if ((err = pppoe_send_padr(sc)) != 0) {
+        sc->sc_padr_retried--;
+        PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADR, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
+      }
+      tcpip_timeout(PPPOE_DISC_TIMEOUT * (1 + sc->sc_padr_retried), pppoe_timeout, sc);
+      break;
+    case PPPOE_STATE_CLOSING:
+      pppoe_do_disconnect(sc);
+      break;
+    default:
+      return;  /* all done, work in peace */
+  }
+}
+
+/* Start a connection (i.e. initiate discovery phase) */
+int
+pppoe_connect(struct pppoe_softc *sc)
+{
+  int err;
+
+  if (sc->sc_state != PPPOE_STATE_INITIAL) {
+    return EBUSY;
+  }
+
+#ifdef PPPOE_SERVER
+  /* wait PADI if IFF_PASSIVE */
+  if ((sc->sc_sppp.pp_if.if_flags & IFF_PASSIVE)) {
+    return 0;
+  }
+#endif
+  /* save state, in case we fail to send PADI */
+  sc->sc_state = PPPOE_STATE_PADI_SENT;
+  sc->sc_padr_retried = 0;
+  err = pppoe_send_padi(sc);
+  PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": failed to send PADI, error=%d\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, err));
+  tcpip_timeout(PPPOE_DISC_TIMEOUT, pppoe_timeout, sc);
+  return err;
+}
+
+/* disconnect */
+void
+pppoe_disconnect(struct pppoe_softc *sc)
+{
+  if (sc->sc_state < PPPOE_STATE_SESSION) {
+    return;
+  }
+  /*
+   * Do not call pppoe_disconnect here, the upper layer state
+   * machine gets confused by this. We must return from this
+   * function and defer disconnecting to the timeout handler.
+   */
+  sc->sc_state = PPPOE_STATE_CLOSING;
+  tcpip_timeout(20, pppoe_timeout, sc);
+}
+
+static int
+pppoe_do_disconnect(struct pppoe_softc *sc)
+{
+  int err;
+
+  if (sc->sc_state < PPPOE_STATE_SESSION) {
+    err = EBUSY;
+  } else {
+    PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": disconnecting\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
+    err = pppoe_send_padt(sc->sc_ethif, sc->sc_session, (const u8_t *)&sc->sc_dest);
+  }
+
+  /* cleanup softc */
+  sc->sc_state = PPPOE_STATE_INITIAL;
+  MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
+  if (sc->sc_ac_cookie) {
+    mem_free(sc->sc_ac_cookie);
+    sc->sc_ac_cookie = NULL;
+  }
+  sc->sc_ac_cookie_len = 0;
+#ifdef PPPOE_SERVER
+  if (sc->sc_hunique) {
+    mem_free(sc->sc_hunique);
+    sc->sc_hunique = NULL;
+  }
+  sc->sc_hunique_len = 0;
+#endif
+  sc->sc_session = 0;
+
+  sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
+
+  return err;
+}
+
+/* Connection attempt aborted */
+static void
+pppoe_abort_connect(struct pppoe_softc *sc)
+{
+  printf("%c%c%"U16_F": could not establish connection\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+  sc->sc_state = PPPOE_STATE_CLOSING;
+
+  sc->sc_linkStatusCB(sc->sc_pd, 0); /* notify upper layers */
+
+  /* clear connection state */
+  MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
+  sc->sc_state = PPPOE_STATE_INITIAL;
+}
+
+/* Send a PADR packet */
+static err_t
+pppoe_send_padr(struct pppoe_softc *sc)
+{
+  struct pbuf *pb;
+  u8_t *p;
+  size_t len, l1 = 0; /* XXX: gcc */
+
+  if (sc->sc_state != PPPOE_STATE_PADR_SENT) {
+    return ERR_CONN;
+  }
+
+  len = 2 + 2 + 2 + 2 + sizeof(sc);    /* service name, host unique */
+  if (sc->sc_service_name != NULL) {    /* service name tag maybe empty */
+    l1 = strlen(sc->sc_service_name);
+    len += l1;
+  }
+  if (sc->sc_ac_cookie_len > 0) {
+    len += 2 + 2 + sc->sc_ac_cookie_len;  /* AC cookie */
+  }
+  pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
+  if (!pb) {
+    return ERR_MEM;
+  }
+  p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
+  PPPOE_ADD_HEADER(p, PPPOE_CODE_PADR, 0, len);
+  PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
+  if (sc->sc_service_name != NULL) {
+    PPPOE_ADD_16(p, l1);
+    MEMCPY(p, sc->sc_service_name, l1);
+    p += l1;
+  } else {
+    PPPOE_ADD_16(p, 0);
+  }
+  if (sc->sc_ac_cookie_len > 0) {
+    PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
+    PPPOE_ADD_16(p, sc->sc_ac_cookie_len);
+    MEMCPY(p, sc->sc_ac_cookie, sc->sc_ac_cookie_len);
+    p += sc->sc_ac_cookie_len;
+  }
+  PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
+  PPPOE_ADD_16(p, sizeof(sc));
+  MEMCPY(p, &sc, sizeof sc);
+
+  return pppoe_output(sc, pb);
+}
+
+/* send a PADT packet */
+static err_t
+pppoe_send_padt(struct netif *outgoing_if, u_int session, const u8_t *dest)
+{
+  struct pbuf *pb;
+  struct eth_hdr *ethhdr;
+  err_t res;
+  u8_t *p;
+
+  pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN, PBUF_RAM);
+  if (!pb) {
+    return ERR_MEM;
+  }
+
+  ethhdr = (struct eth_hdr *)pb->payload;
+  ethhdr->type = htons(ETHTYPE_PPPOEDISC);
+  MEMCPY(ethhdr->dest.addr, dest, sizeof(ethhdr->dest.addr));
+  MEMCPY(ethhdr->src.addr, ((struct eth_addr *)outgoing_if->hwaddr)->addr, sizeof(ethhdr->src.addr));
+
+  p = (u8_t*)(ethhdr + 1);
+  PPPOE_ADD_HEADER(p, PPPOE_CODE_PADT, session, 0);
+
+  res = outgoing_if->linkoutput(outgoing_if, pb);
+
+  pbuf_free(pb);
+
+  return res;
+}
+
+#ifdef PPPOE_SERVER
+static err_t
+pppoe_send_pado(struct pppoe_softc *sc)
+{
+  struct pbuf *pb;
+  u8_t *p;
+  size_t len;
+
+  if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
+    return ERR_CONN;
+  }
+
+  /* calc length */
+  len = 0;
+  /* include ac_cookie */
+  len += 2 + 2 + sizeof(sc);
+  /* include hunique */
+  len += 2 + 2 + sc->sc_hunique_len;
+  pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
+  if (!pb) {
+    return ERR_MEM;
+  }
+  p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
+  PPPOE_ADD_HEADER(p, PPPOE_CODE_PADO, 0, len);
+  PPPOE_ADD_16(p, PPPOE_TAG_ACCOOKIE);
+  PPPOE_ADD_16(p, sizeof(sc));
+  MEMCPY(p, &sc, sizeof(sc));
+  p += sizeof(sc);
+  PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
+  PPPOE_ADD_16(p, sc->sc_hunique_len);
+  MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
+  return pppoe_output(sc, pb);
+}
+
+static err_t
+pppoe_send_pads(struct pppoe_softc *sc)
+{
+  struct pbuf *pb;
+  u8_t *p;
+  size_t len, l1 = 0;  /* XXX: gcc */
+
+  if (sc->sc_state != PPPOE_STATE_PADO_SENT) {
+    return ERR_CONN;
+  }
+
+  sc->sc_session = mono_time.tv_sec % 0xff + 1;
+  /* calc length */
+  len = 0;
+  /* include hunique */
+  len += 2 + 2 + 2 + 2 + sc->sc_hunique_len;  /* service name, host unique*/
+  if (sc->sc_service_name != NULL) {    /* service name tag maybe empty */
+    l1 = strlen(sc->sc_service_name);
+    len += l1;
+  }
+  pb = pbuf_alloc(PBUF_LINK, sizeof(struct eth_hdr) + PPPOE_HEADERLEN + len, PBUF_RAM);
+  if (!pb) {
+    return ERR_MEM;
+  }
+  p = (u8_t*)pb->payload + sizeof (struct eth_hdr);
+  PPPOE_ADD_HEADER(p, PPPOE_CODE_PADS, sc->sc_session, len);
+  PPPOE_ADD_16(p, PPPOE_TAG_SNAME);
+  if (sc->sc_service_name != NULL) {
+    PPPOE_ADD_16(p, l1);
+    MEMCPY(p, sc->sc_service_name, l1);
+    p += l1;
+  } else {
+    PPPOE_ADD_16(p, 0);
+  }
+  PPPOE_ADD_16(p, PPPOE_TAG_HUNIQUE);
+  PPPOE_ADD_16(p, sc->sc_hunique_len);
+  MEMCPY(p, sc->sc_hunique, sc->sc_hunique_len);
+  return pppoe_output(sc, pb);
+}
+#endif
+
+err_t
+pppoe_xmit(struct pppoe_softc *sc, struct pbuf *pb)
+{
+  u8_t *p;
+  size_t len;
+
+  /* are we ready to process data yet? */
+  if (sc->sc_state < PPPOE_STATE_SESSION) {
+    /*sppp_flush(&sc->sc_sppp.pp_if);*/
+    pbuf_free(pb);
+    return ERR_CONN;
+  }
+
+  len = pb->tot_len;
+
+  /* make room for Ethernet header - should not fail */
+  if (pbuf_header(pb, sizeof(struct eth_hdr) + PPPOE_HEADERLEN) != 0) {
+    /* bail out */
+    PPPDEBUG((LOG_ERR, "pppoe: %c%c%"U16_F": pppoe_xmit: could not allocate room for header\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num));
+    LINK_STATS_INC(link.lenerr);
+    pbuf_free(pb);
+    return ERR_BUF;
+  } 
+
+  p = (u8_t*)pb->payload + sizeof(struct eth_hdr);
+  PPPOE_ADD_HEADER(p, 0, sc->sc_session, len);
+
+  return pppoe_output(sc, pb);
+}
+
+#if 0 /*def PFIL_HOOKS*/
+static int
+pppoe_ifattach_hook(void *arg, struct pbuf **mp, struct netif *ifp, int dir)
+{
+  struct pppoe_softc *sc;
+  int s;
+
+  if (mp != (struct pbuf **)PFIL_IFNET_DETACH) {
+    return 0;
+  }
+
+  LIST_FOREACH(sc, &pppoe_softc_list, sc_list) {
+    if (sc->sc_ethif != ifp) {
+      continue;
+    }
+    if (sc->sc_sppp.pp_if.if_flags & IFF_UP) {
+      sc->sc_sppp.pp_if.if_flags &= ~(IFF_UP|IFF_RUNNING);
+      printf("%c%c%"U16_F": ethernet interface detached, going down\n",
+          sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num);
+    }
+    sc->sc_ethif = NULL;
+    pppoe_clear_softc(sc, "ethernet interface detached");
+  }
+
+  return 0;
+}
+#endif
+
+static void
+pppoe_clear_softc(struct pppoe_softc *sc, const char *message)
+{
+  LWIP_UNUSED_ARG(message);
+
+  /* stop timer */
+  tcpip_untimeout(pppoe_timeout, sc);
+  PPPDEBUG((LOG_DEBUG, "pppoe: %c%c%"U16_F": session 0x%x terminated, %s\n", sc->sc_ethif->name[0], sc->sc_ethif->name[1], sc->sc_ethif->num, sc->sc_session, message));
+
+  /* fix our state */
+  sc->sc_state = PPPOE_STATE_INITIAL;
+
+  /* notify upper layers */
+  sc->sc_linkStatusCB(sc->sc_pd, 0);
+
+  /* clean up softc */
+  MEMCPY(&sc->sc_dest, ethbroadcast.addr, sizeof(sc->sc_dest));
+  if (sc->sc_ac_cookie) {
+    mem_free(sc->sc_ac_cookie);
+    sc->sc_ac_cookie = NULL;
+  }
+  sc->sc_ac_cookie_len = 0;
+  sc->sc_session = 0;
+}
+
+#endif /* PPPOE_SUPPORT */
+
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pppdebug.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pppdebug.h
new file mode 100644
index 000000000..6253863c9
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/pppdebug.h
@@ -0,0 +1,86 @@
+/*****************************************************************************
+* pppdebug.h - System debugging utilities.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* portions Copyright (c) 1998 Global Election Systems Inc.
+* portions Copyright (c) 2001 by Cognizant Pty Ltd.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY (please don't use tabs!)
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 98-07-29 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Original.
+*
+*****************************************************************************
+*/
+#ifndef PPPDEBUG_H
+#define PPPDEBUG_H
+
+/************************
+*** PUBLIC DATA TYPES ***
+************************/
+/* Trace levels. */
+typedef enum {
+LOG_CRITICAL = 0,
+LOG_ERR      = 1,
+LOG_NOTICE   = 2,
+LOG_WARNING  = 3,
+LOG_INFO     = 5,
+LOG_DETAIL   = 6,
+LOG_DEBUG    = 7
+} LogCodes;
+
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+/*
+ * ppp_trace - a form of printf to send tracing information to stderr
+ */
+void ppp_trace(int level, const char *format,...);
+
+#define TRACELCP PPP_DEBUG
+
+#if PPP_DEBUG
+
+#define AUTHDEBUG(a) ppp_trace a
+#define IPCPDEBUG(a) ppp_trace a
+#define UPAPDEBUG(a) ppp_trace a
+#define LCPDEBUG(a)  ppp_trace a
+#define FSMDEBUG(a)  ppp_trace a
+#define CHAPDEBUG(a) ppp_trace a
+#define PPPDEBUG(a)  ppp_trace a
+
+#else /* PPP_DEBUG */
+
+#define AUTHDEBUG(a)
+#define IPCPDEBUG(a)
+#define UPAPDEBUG(a)
+#define LCPDEBUG(a)
+#define FSMDEBUG(a)
+#define CHAPDEBUG(a)
+#define PPPDEBUG(a)
+
+#endif /* PPP_DEBUG */
+
+#endif /* PPPDEBUG_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/randm.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/randm.c
new file mode 100644
index 000000000..0c622a0b0
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/randm.c
@@ -0,0 +1,248 @@
+/*****************************************************************************
+* randm.c - Random number generator program file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* Copyright (c) 1998 by Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 98-06-03 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
+*   Extracted from avos.
+*****************************************************************************/
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "md5.h"
+#include "randm.h"
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+
+#if MD5_SUPPORT /* this module depends on MD5 */
+#define RANDPOOLSZ 16   /* Bytes stored in the pool of randomness. */
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+static char randPool[RANDPOOLSZ];   /* Pool of randomness. */
+static long randCount = 0;      /* Pseudo-random incrementer */
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ * Initialize the random number generator.
+ *
+ * Since this is to be called on power up, we don't have much
+ *  system randomess to work with.  Here all we use is the
+ *  real-time clock.  We'll accumulate more randomness as soon
+ *  as things start happening.
+ */
+void
+avRandomInit()
+{
+  avChurnRand(NULL, 0);
+}
+
+/*
+ * Churn the randomness pool on a random event.  Call this early and often
+ *  on random and semi-random system events to build randomness in time for
+ *  usage.  For randomly timed events, pass a null pointer and a zero length
+ *  and this will use the system timer and other sources to add randomness.
+ *  If new random data is available, pass a pointer to that and it will be
+ *  included.
+ *
+ * Ref: Applied Cryptography 2nd Ed. by Bruce Schneier p. 427
+ */
+void
+avChurnRand(char *randData, u32_t randLen)
+{
+  MD5_CTX md5;
+
+  /* ppp_trace(LOG_INFO, "churnRand: %u@%P\n", randLen, randData); */
+  MD5Init(&md5);
+  MD5Update(&md5, (u_char *)randPool, sizeof(randPool));
+  if (randData) {
+    MD5Update(&md5, (u_char *)randData, randLen);
+  } else {
+    struct {
+      /* INCLUDE fields for any system sources of randomness */
+      char foobar;
+    } sysData;
+
+    /* Load sysData fields here. */
+    MD5Update(&md5, (u_char *)&sysData, sizeof(sysData));
+  }
+  MD5Final((u_char *)randPool, &md5);
+/*  ppp_trace(LOG_INFO, "churnRand: -> 0\n"); */
+}
+
+/*
+ * Use the random pool to generate random data.  This degrades to pseudo
+ *  random when used faster than randomness is supplied using churnRand().
+ * Note: It's important that there be sufficient randomness in randPool
+ *  before this is called for otherwise the range of the result may be
+ *  narrow enough to make a search feasible.
+ *
+ * Ref: Applied Cryptography 2nd Ed. by Bruce Schneier p. 427
+ *
+ * XXX Why does he not just call churnRand() for each block?  Probably
+ *  so that you don't ever publish the seed which could possibly help
+ *  predict future values.
+ * XXX Why don't we preserve md5 between blocks and just update it with
+ *  randCount each time?  Probably there is a weakness but I wish that
+ *  it was documented.
+ */
+void
+avGenRand(char *buf, u32_t bufLen)
+{
+  MD5_CTX md5;
+  u_char tmp[16];
+  u32_t n;
+
+  while (bufLen > 0) {
+    n = LWIP_MIN(bufLen, RANDPOOLSZ);
+    MD5Init(&md5);
+    MD5Update(&md5, (u_char *)randPool, sizeof(randPool));
+    MD5Update(&md5, (u_char *)&randCount, sizeof(randCount));
+    MD5Final(tmp, &md5);
+    randCount++;
+    MEMCPY(buf, tmp, n);
+    buf += n;
+    bufLen -= n;
+  }
+}
+
+/*
+ * Return a new random number.
+ */
+u32_t
+avRandom()
+{
+  u32_t newRand;
+
+  avGenRand((char *)&newRand, sizeof(newRand));
+
+  return newRand;
+}
+
+#else /* MD5_SUPPORT */
+
+/*****************************/
+/*** LOCAL DATA STRUCTURES ***/
+/*****************************/
+static int  avRandomized = 0;       /* Set when truely randomized. */
+static u32_t avRandomSeed = 0;      /* Seed used for random number generation. */
+
+
+/***********************************/
+/*** PUBLIC FUNCTION DEFINITIONS ***/
+/***********************************/
+/*
+ * Initialize the random number generator.
+ *
+ * Here we attempt to compute a random number seed but even if
+ * it isn't random, we'll randomize it later.
+ *
+ * The current method uses the fields from the real time clock,
+ * the idle process counter, the millisecond counter, and the
+ * hardware timer tick counter.  When this is invoked
+ * in startup(), then the idle counter and timer values may
+ * repeat after each boot and the real time clock may not be
+ * operational.  Thus we call it again on the first random
+ * event.
+ */
+void
+avRandomInit()
+{
+#if 0
+  /* Get a pointer into the last 4 bytes of clockBuf. */
+  u32_t *lptr1 = (u32_t *)((char *)&clockBuf[3]);
+
+  /*
+   * Initialize our seed using the real-time clock, the idle
+   * counter, the millisecond timer, and the hardware timer
+   * tick counter.  The real-time clock and the hardware
+   * tick counter are the best sources of randomness but
+   * since the tick counter is only 16 bit (and truncated
+   * at that), the idle counter and millisecond timer
+   * (which may be small values) are added to help
+   * randomize the lower 16 bits of the seed.
+   */
+  readClk();
+  avRandomSeed += *(u32_t *)clockBuf + *lptr1 + OSIdleCtr
+           + ppp_mtime() + ((u32_t)TM1 << 16) + TM1;
+#else
+  avRandomSeed += sys_jiffies(); /* XXX */
+#endif
+
+  /* Initialize the Borland random number generator. */
+  srand((unsigned)avRandomSeed);
+}
+
+/*
+ * Randomize our random seed value.  Here we use the fact that
+ * this function is called at *truely random* times by the polling
+ * and network functions.  Here we only get 16 bits of new random
+ * value but we use the previous value to randomize the other 16
+ * bits.
+ */
+void
+avRandomize(void)
+{
+  static u32_t last_jiffies;
+
+  if (!avRandomized) {
+    avRandomized = !0;
+    avRandomInit();
+    /* The initialization function also updates the seed. */
+  } else {
+    /* avRandomSeed += (avRandomSeed << 16) + TM1; */
+    avRandomSeed += (sys_jiffies() - last_jiffies); /* XXX */
+  }
+  last_jiffies = sys_jiffies();
+}
+
+/*
+ * Return a new random number.
+ * Here we use the Borland rand() function to supply a pseudo random
+ * number which we make truely random by combining it with our own
+ * seed which is randomized by truely random events. 
+ * Thus the numbers will be truely random unless there have been no
+ * operator or network events in which case it will be pseudo random
+ * seeded by the real time clock.
+ */
+u32_t
+avRandom()
+{
+  return ((((u32_t)rand() << 16) + rand()) + avRandomSeed);
+}
+
+#endif /* MD5_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/randm.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/randm.h
new file mode 100644
index 000000000..a0984b020
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/randm.h
@@ -0,0 +1,81 @@
+/*****************************************************************************
+* randm.h - Random number generator header file.
+*
+* Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
+* Copyright (c) 1998 Global Election Systems Inc.
+*
+* The authors hereby grant permission to use, copy, modify, distribute,
+* and license this software and its documentation for any purpose, provided
+* that existing copyright notices are retained in all copies and that this
+* notice and the following disclaimer are included verbatim in any 
+* distributions. No written agreement, license, or royalty fee is required
+* for any of the authorized uses.
+*
+* THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
+* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
+* IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+******************************************************************************
+* REVISION HISTORY
+*
+* 03-01-01 Marc Boucher <marc@mbsi.ca>
+*   Ported to lwIP.
+* 98-05-29 Guy Lancaster <glanca@gesn.com>, Global Election Systems Inc.
+*   Extracted from avos.
+*****************************************************************************/
+
+#ifndef RANDM_H
+#define RANDM_H
+
+/***********************
+*** PUBLIC FUNCTIONS ***
+***********************/
+/*
+ * Initialize the random number generator.
+ */
+void avRandomInit(void);
+
+/*
+ * Churn the randomness pool on a random event.  Call this early and often
+ * on random and semi-random system events to build randomness in time for
+ * usage.  For randomly timed events, pass a null pointer and a zero length
+ * and this will use the system timer and other sources to add randomness.
+ * If new random data is available, pass a pointer to that and it will be
+ * included.
+ */
+void avChurnRand(char *randData, u32_t randLen);
+
+/*
+ * Randomize our random seed value.  To be called for truely random events
+ * such as user operations and network traffic.
+ */
+#if MD5_SUPPORT
+#define avRandomize() avChurnRand(NULL, 0)
+#else  /* MD5_SUPPORT */
+void avRandomize(void);
+#endif /* MD5_SUPPORT */
+
+/*
+ * Use the random pool to generate random data.  This degrades to pseudo
+ * random when used faster than randomness is supplied using churnRand().
+ * Thus it's important to make sure that the results of this are not
+ * published directly because one could predict the next result to at
+ * least some degree.  Also, it's important to get a good seed before
+ * the first use.
+ */
+void avGenRand(char *buf, u32_t bufLen);
+
+/*
+ * Return a new random number.
+ */
+u32_t avRandom(void);
+
+
+#endif /* RANDM_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vj.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vj.c
new file mode 100644
index 000000000..814ea72c5
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vj.c
@@ -0,0 +1,660 @@
+/*
+ * Routines to compress and uncompess tcp packets (for transmission
+ * over low speed serial lines.
+ *
+ * Copyright (c) 1989 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989:
+ *   Initial distribution.
+ *
+ * Modified June 1993 by Paul Mackerras, paulus@cs.anu.edu.au,
+ * so that the entire packet being decompressed doesn't have
+ * to be in contiguous memory (just the compressed header).
+ *
+ * Modified March 1998 by Guy Lancaster, glanca@gesn.com,
+ * for a 16 bit processor.
+ */
+
+#include "lwip/opt.h"
+
+#if PPP_SUPPORT /* don't build if not configured for use in lwipopts.h */
+
+#include "ppp.h"
+#include "pppdebug.h"
+
+#include "vj.h"
+
+#include <string.h>
+
+#if VJ_SUPPORT
+
+#if LINK_STATS
+#define INCR(counter) ++comp->stats.counter
+#else
+#define INCR(counter)
+#endif
+
+#if defined(NO_CHAR_BITFIELDS)
+#define getip_hl(base)  ((base).ip_hl_v&0xf)
+#define getth_off(base) (((base).th_x2_off&0xf0)>>4)
+#else
+#define getip_hl(base)  ((base).ip_hl)
+#define getth_off(base) ((base).th_off)
+#endif
+
+void
+vj_compress_init(struct vjcompress *comp)
+{
+  register u_int i;
+  register struct cstate *tstate = comp->tstate;
+  
+#if MAX_SLOTS == 0
+  memset((char *)comp, 0, sizeof(*comp));
+#endif
+  comp->maxSlotIndex = MAX_SLOTS - 1;
+  comp->compressSlot = 0;    /* Disable slot ID compression by default. */
+  for (i = MAX_SLOTS - 1; i > 0; --i) {
+    tstate[i].cs_id = i;
+    tstate[i].cs_next = &tstate[i - 1];
+  }
+  tstate[0].cs_next = &tstate[MAX_SLOTS - 1];
+  tstate[0].cs_id = 0;
+  comp->last_cs = &tstate[0];
+  comp->last_recv = 255;
+  comp->last_xmit = 255;
+  comp->flags = VJF_TOSS;
+}
+
+
+/* ENCODE encodes a number that is known to be non-zero.  ENCODEZ
+ * checks for zero (since zero has to be encoded in the long, 3 byte
+ * form).
+ */
+#define ENCODE(n) { \
+  if ((u_short)(n) >= 256) { \
+    *cp++ = 0; \
+    cp[1] = (n); \
+    cp[0] = (n) >> 8; \
+    cp += 2; \
+  } else { \
+    *cp++ = (n); \
+  } \
+}
+#define ENCODEZ(n) { \
+  if ((u_short)(n) >= 256 || (u_short)(n) == 0) { \
+    *cp++ = 0; \
+    cp[1] = (n); \
+    cp[0] = (n) >> 8; \
+    cp += 2; \
+  } else { \
+    *cp++ = (n); \
+  } \
+}
+
+#define DECODEL(f) { \
+  if (*cp == 0) {\
+    u32_t tmp = ntohl(f) + ((cp[1] << 8) | cp[2]); \
+    (f) = htonl(tmp); \
+    cp += 3; \
+  } else { \
+    u32_t tmp = ntohl(f) + (u32_t)*cp++; \
+    (f) = htonl(tmp); \
+  } \
+}
+
+#define DECODES(f) { \
+  if (*cp == 0) {\
+    u_short tmp = ntohs(f) + (((u_short)cp[1] << 8) | cp[2]); \
+    (f) = htons(tmp); \
+    cp += 3; \
+  } else { \
+    u_short tmp = ntohs(f) + (u_short)*cp++; \
+    (f) = htons(tmp); \
+  } \
+}
+
+#define DECODEU(f) { \
+  if (*cp == 0) {\
+    (f) = htons(((u_short)cp[1] << 8) | cp[2]); \
+    cp += 3; \
+  } else { \
+    (f) = htons((u_short)*cp++); \
+  } \
+}
+
+/*
+ * vj_compress_tcp - Attempt to do Van Jacobsen header compression on a
+ * packet.  This assumes that nb and comp are not null and that the first
+ * buffer of the chain contains a valid IP header.
+ * Return the VJ type code indicating whether or not the packet was
+ * compressed.
+ */
+u_int
+vj_compress_tcp(struct vjcompress *comp, struct pbuf *pb)
+{
+  register struct ip *ip = (struct ip *)pb->payload;
+  register struct cstate *cs = comp->last_cs->cs_next;
+  register u_short hlen = getip_hl(*ip);
+  register struct tcphdr *oth;
+  register struct tcphdr *th;
+  register u_short deltaS, deltaA;
+  register u_long deltaL;
+  register u_int changes = 0;
+  u_char new_seq[16];
+  register u_char *cp = new_seq;
+
+  /*  
+   * Check that the packet is IP proto TCP.
+   */
+  if (ip->ip_p != IPPROTO_TCP) {
+    return (TYPE_IP);
+  }
+
+  /*
+   * Bail if this is an IP fragment or if the TCP packet isn't
+   * `compressible' (i.e., ACK isn't set or some other control bit is
+   * set).  
+   */
+  if ((ip->ip_off & htons(0x3fff)) || pb->tot_len < 40) {
+    return (TYPE_IP);
+  }
+  th = (struct tcphdr *)&((long *)ip)[hlen];
+  if ((th->th_flags & (TCP_SYN|TCP_FIN|TCP_RST|TCP_ACK)) != TCP_ACK) {
+    return (TYPE_IP);
+  }
+  /*
+   * Packet is compressible -- we're going to send either a
+   * COMPRESSED_TCP or UNCOMPRESSED_TCP packet.  Either way we need
+   * to locate (or create) the connection state.  Special case the
+   * most recently used connection since it's most likely to be used
+   * again & we don't have to do any reordering if it's used.
+   */
+  INCR(vjs_packets);
+  if (ip->ip_src.s_addr != cs->cs_ip.ip_src.s_addr 
+      || ip->ip_dst.s_addr != cs->cs_ip.ip_dst.s_addr 
+      || *(long *)th != ((long *)&cs->cs_ip)[getip_hl(cs->cs_ip)]) {
+    /*
+     * Wasn't the first -- search for it.
+     *
+     * States are kept in a circularly linked list with
+     * last_cs pointing to the end of the list.  The
+     * list is kept in lru order by moving a state to the
+     * head of the list whenever it is referenced.  Since
+     * the list is short and, empirically, the connection
+     * we want is almost always near the front, we locate
+     * states via linear search.  If we don't find a state
+     * for the datagram, the oldest state is (re-)used.
+     */
+    register struct cstate *lcs;
+    register struct cstate *lastcs = comp->last_cs;
+    
+    do {
+      lcs = cs; cs = cs->cs_next;
+      INCR(vjs_searches);
+      if (ip->ip_src.s_addr == cs->cs_ip.ip_src.s_addr
+          && ip->ip_dst.s_addr == cs->cs_ip.ip_dst.s_addr
+          && *(long *)th == ((long *)&cs->cs_ip)[getip_hl(cs->cs_ip)]) {
+        goto found;
+      }
+    } while (cs != lastcs);
+
+    /*
+     * Didn't find it -- re-use oldest cstate.  Send an
+     * uncompressed packet that tells the other side what
+     * connection number we're using for this conversation.
+     * Note that since the state list is circular, the oldest
+     * state points to the newest and we only need to set
+     * last_cs to update the lru linkage.
+     */
+    INCR(vjs_misses);
+    comp->last_cs = lcs;
+    hlen += getth_off(*th);
+    hlen <<= 2;
+    /* Check that the IP/TCP headers are contained in the first buffer. */
+    if (hlen > pb->len) {
+      return (TYPE_IP);
+    }
+    goto uncompressed;
+
+    found:
+    /*
+     * Found it -- move to the front on the connection list.
+     */
+    if (cs == lastcs) {
+      comp->last_cs = lcs;
+    } else {
+      lcs->cs_next = cs->cs_next;
+      cs->cs_next = lastcs->cs_next;
+      lastcs->cs_next = cs;
+    }
+  }
+
+  oth = (struct tcphdr *)&((long *)&cs->cs_ip)[hlen];
+  deltaS = hlen;
+  hlen += getth_off(*th);
+  hlen <<= 2;
+  /* Check that the IP/TCP headers are contained in the first buffer. */
+  if (hlen > pb->len) {
+    PPPDEBUG((LOG_INFO, "vj_compress_tcp: header len %d spans buffers\n", hlen));
+    return (TYPE_IP);
+  }
+
+  /*
+   * Make sure that only what we expect to change changed. The first
+   * line of the `if' checks the IP protocol version, header length &
+   * type of service.  The 2nd line checks the "Don't fragment" bit.
+   * The 3rd line checks the time-to-live and protocol (the protocol
+   * check is unnecessary but costless).  The 4th line checks the TCP
+   * header length.  The 5th line checks IP options, if any.  The 6th
+   * line checks TCP options, if any.  If any of these things are
+   * different between the previous & current datagram, we send the
+   * current datagram `uncompressed'.
+   */
+  if (((u_short *)ip)[0] != ((u_short *)&cs->cs_ip)[0] 
+      || ((u_short *)ip)[3] != ((u_short *)&cs->cs_ip)[3] 
+      || ((u_short *)ip)[4] != ((u_short *)&cs->cs_ip)[4] 
+      || getth_off(*th) != getth_off(*oth) 
+      || (deltaS > 5 && BCMP(ip + 1, &cs->cs_ip + 1, (deltaS - 5) << 2)) 
+      || (getth_off(*th) > 5 && BCMP(th + 1, oth + 1, (getth_off(*th) - 5) << 2))) {
+    goto uncompressed;
+  }
+
+  /*
+   * Figure out which of the changing fields changed.  The
+   * receiver expects changes in the order: urgent, window,
+   * ack, seq (the order minimizes the number of temporaries
+   * needed in this section of code).
+   */
+  if (th->th_flags & TCP_URG) {
+    deltaS = ntohs(th->th_urp);
+    ENCODEZ(deltaS);
+    changes |= NEW_U;
+  } else if (th->th_urp != oth->th_urp) {
+    /* argh! URG not set but urp changed -- a sensible
+     * implementation should never do this but RFC793
+     * doesn't prohibit the change so we have to deal
+     * with it. */
+    goto uncompressed;
+  }
+
+  if ((deltaS = (u_short)(ntohs(th->th_win) - ntohs(oth->th_win))) != 0) {
+    ENCODE(deltaS);
+    changes |= NEW_W;
+  }
+
+  if ((deltaL = ntohl(th->th_ack) - ntohl(oth->th_ack)) != 0) {
+    if (deltaL > 0xffff) {
+      goto uncompressed;
+    }
+    deltaA = (u_short)deltaL;
+    ENCODE(deltaA);
+    changes |= NEW_A;
+  }
+
+  if ((deltaL = ntohl(th->th_seq) - ntohl(oth->th_seq)) != 0) {
+    if (deltaL > 0xffff) {
+      goto uncompressed;
+    }
+    deltaS = (u_short)deltaL;
+    ENCODE(deltaS);
+    changes |= NEW_S;
+  }
+
+  switch(changes) {
+  case 0:
+    /*
+     * Nothing changed. If this packet contains data and the
+     * last one didn't, this is probably a data packet following
+     * an ack (normal on an interactive connection) and we send
+     * it compressed.  Otherwise it's probably a retransmit,
+     * retransmitted ack or window probe.  Send it uncompressed
+     * in case the other side missed the compressed version.
+     */
+    if (ip->ip_len != cs->cs_ip.ip_len &&
+      ntohs(cs->cs_ip.ip_len) == hlen) {
+      break;
+    }
+
+  /* (fall through) */
+
+  case SPECIAL_I:
+  case SPECIAL_D:
+    /*
+     * actual changes match one of our special case encodings --
+     * send packet uncompressed.
+     */
+    goto uncompressed;
+
+  case NEW_S|NEW_A:
+    if (deltaS == deltaA && deltaS == ntohs(cs->cs_ip.ip_len) - hlen) {
+      /* special case for echoed terminal traffic */
+      changes = SPECIAL_I;
+      cp = new_seq;
+    }
+    break;
+
+  case NEW_S:
+    if (deltaS == ntohs(cs->cs_ip.ip_len) - hlen) {
+      /* special case for data xfer */
+      changes = SPECIAL_D;
+      cp = new_seq;
+    }
+    break;
+  }
+
+  deltaS = (u_short)(ntohs(ip->ip_id) - ntohs(cs->cs_ip.ip_id));
+  if (deltaS != 1) {
+    ENCODEZ(deltaS);
+    changes |= NEW_I;
+  }
+  if (th->th_flags & TCP_PSH) {
+    changes |= TCP_PUSH_BIT;
+  }
+  /*
+   * Grab the cksum before we overwrite it below.  Then update our
+   * state with this packet's header.
+   */
+  deltaA = ntohs(th->th_sum);
+  BCOPY(ip, &cs->cs_ip, hlen);
+
+  /*
+   * We want to use the original packet as our compressed packet.
+   * (cp - new_seq) is the number of bytes we need for compressed
+   * sequence numbers.  In addition we need one byte for the change
+   * mask, one for the connection id and two for the tcp checksum.
+   * So, (cp - new_seq) + 4 bytes of header are needed.  hlen is how
+   * many bytes of the original packet to toss so subtract the two to
+   * get the new packet size.
+   */
+  deltaS = (u_short)(cp - new_seq);
+  if (!comp->compressSlot || comp->last_xmit != cs->cs_id) {
+    comp->last_xmit = cs->cs_id;
+    hlen -= deltaS + 4;
+    if(pbuf_header(pb, -hlen)){
+      /* Can we cope with this failing?  Just assert for now */
+      LWIP_ASSERT("pbuf_header failed\n", 0);
+    }
+    cp = (u_char *)pb->payload;
+    *cp++ = changes | NEW_C;
+    *cp++ = cs->cs_id;
+  } else {
+    hlen -= deltaS + 3;
+    if(pbuf_header(pb, -hlen)) {
+      /* Can we cope with this failing?  Just assert for now */
+      LWIP_ASSERT("pbuf_header failed\n", 0);
+    }
+    cp = (u_char *)pb->payload;
+    *cp++ = changes;
+  }
+  *cp++ = deltaA >> 8;
+  *cp++ = deltaA;
+  BCOPY(new_seq, cp, deltaS);
+  INCR(vjs_compressed);
+  return (TYPE_COMPRESSED_TCP);
+
+  /*
+   * Update connection state cs & send uncompressed packet (that is,
+   * a regular ip/tcp packet but with the 'conversation id' we hope
+   * to use on future compressed packets in the protocol field).
+   */
+uncompressed:
+  BCOPY(ip, &cs->cs_ip, hlen);
+  ip->ip_p = cs->cs_id;
+  comp->last_xmit = cs->cs_id;
+  return (TYPE_UNCOMPRESSED_TCP);
+}
+
+/*
+ * Called when we may have missed a packet.
+ */
+void
+vj_uncompress_err(struct vjcompress *comp)
+{
+  comp->flags |= VJF_TOSS;
+  INCR(vjs_errorin);
+}
+
+/*
+ * "Uncompress" a packet of type TYPE_UNCOMPRESSED_TCP.
+ * Return 0 on success, -1 on failure.
+ */
+int
+vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp)
+{
+  register u_int hlen;
+  register struct cstate *cs;
+  register struct ip *ip;
+  
+  ip = (struct ip *)nb->payload;
+  hlen = getip_hl(*ip) << 2;
+  if (ip->ip_p >= MAX_SLOTS
+      || hlen + sizeof(struct tcphdr) > nb->len
+      || (hlen += getth_off(*((struct tcphdr *)&((char *)ip)[hlen])) << 2)
+          > nb->len
+      || hlen > MAX_HDR) {
+    PPPDEBUG((LOG_INFO, "vj_uncompress_uncomp: bad cid=%d, hlen=%d buflen=%d\n", 
+          ip->ip_p, hlen, nb->len));
+    comp->flags |= VJF_TOSS;
+    INCR(vjs_errorin);
+    return -1;
+  }
+  cs = &comp->rstate[comp->last_recv = ip->ip_p];
+  comp->flags &=~ VJF_TOSS;
+  ip->ip_p = IPPROTO_TCP;
+  BCOPY(ip, &cs->cs_ip, hlen);
+  cs->cs_hlen = hlen;
+  INCR(vjs_uncompressedin);
+  return 0;
+}
+
+/*
+ * Uncompress a packet of type TYPE_COMPRESSED_TCP.
+ * The packet is composed of a buffer chain and the first buffer
+ * must contain an accurate chain length.
+ * The first buffer must include the entire compressed TCP/IP header. 
+ * This procedure replaces the compressed header with the uncompressed
+ * header and returns the length of the VJ header.
+ */
+int
+vj_uncompress_tcp(struct pbuf **nb, struct vjcompress *comp)
+{
+  u_char *cp;
+  struct tcphdr *th;
+  struct cstate *cs;
+  u_short *bp;
+  struct pbuf *n0 = *nb;
+  u32_t tmp;
+  u_int vjlen, hlen, changes;
+
+  INCR(vjs_compressedin);
+  cp = (u_char *)n0->payload;
+  changes = *cp++;
+  if (changes & NEW_C) {
+    /* 
+     * Make sure the state index is in range, then grab the state.
+     * If we have a good state index, clear the 'discard' flag. 
+     */
+    if (*cp >= MAX_SLOTS) {
+      PPPDEBUG((LOG_INFO, "vj_uncompress_tcp: bad cid=%d\n", *cp));
+      goto bad;
+    }
+
+    comp->flags &=~ VJF_TOSS;
+    comp->last_recv = *cp++;
+  } else {
+    /* 
+     * this packet has an implicit state index.  If we've
+     * had a line error since the last time we got an
+     * explicit state index, we have to toss the packet. 
+     */
+    if (comp->flags & VJF_TOSS) {
+      PPPDEBUG((LOG_INFO, "vj_uncompress_tcp: tossing\n"));
+      INCR(vjs_tossed);
+      return (-1);
+    }
+  }
+  cs = &comp->rstate[comp->last_recv];
+  hlen = getip_hl(cs->cs_ip) << 2;
+  th = (struct tcphdr *)&((u_char *)&cs->cs_ip)[hlen];
+  th->th_sum = htons((*cp << 8) | cp[1]);
+  cp += 2;
+  if (changes & TCP_PUSH_BIT) {
+    th->th_flags |= TCP_PSH;
+  } else {
+    th->th_flags &=~ TCP_PSH;
+  }
+
+  switch (changes & SPECIALS_MASK) {
+  case SPECIAL_I:
+    {
+      register u32_t i = ntohs(cs->cs_ip.ip_len) - cs->cs_hlen;
+      /* some compilers can't nest inline assembler.. */
+      tmp = ntohl(th->th_ack) + i;
+      th->th_ack = htonl(tmp);
+      tmp = ntohl(th->th_seq) + i;
+      th->th_seq = htonl(tmp);
+    }
+    break;
+
+  case SPECIAL_D:
+    /* some compilers can't nest inline assembler.. */
+    tmp = ntohl(th->th_seq) + ntohs(cs->cs_ip.ip_len) - cs->cs_hlen;
+    th->th_seq = htonl(tmp);
+    break;
+
+  default:
+    if (changes & NEW_U) {
+      th->th_flags |= TCP_URG;
+      DECODEU(th->th_urp);
+    } else {
+      th->th_flags &=~ TCP_URG;
+    }
+    if (changes & NEW_W) {
+      DECODES(th->th_win);
+    }
+    if (changes & NEW_A) {
+      DECODEL(th->th_ack);
+    }
+    if (changes & NEW_S) {
+      DECODEL(th->th_seq);
+    }
+    break;
+  }
+  if (changes & NEW_I) {
+    DECODES(cs->cs_ip.ip_id);
+  } else {
+    cs->cs_ip.ip_id = ntohs(cs->cs_ip.ip_id) + 1;
+    cs->cs_ip.ip_id = htons(cs->cs_ip.ip_id);
+  }
+
+  /*
+   * At this point, cp points to the first byte of data in the
+   * packet.  Fill in the IP total length and update the IP
+   * header checksum.
+   */
+  vjlen = (u_short)(cp - (u_char*)n0->payload);
+  if (n0->len < vjlen) {
+    /* 
+     * We must have dropped some characters (crc should detect
+     * this but the old slip framing won't) 
+     */
+    PPPDEBUG((LOG_INFO, "vj_uncompress_tcp: head buffer %d too short %d\n", 
+          n0->len, vjlen));
+    goto bad;
+  }
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+  tmp = n0->tot_len - vjlen + cs->cs_hlen;
+  cs->cs_ip.ip_len = htons(tmp);
+#else
+  cs->cs_ip.ip_len = htons(n0->tot_len - vjlen + cs->cs_hlen);
+#endif
+
+  /* recompute the ip header checksum */
+  bp = (u_short *) &cs->cs_ip;
+  cs->cs_ip.ip_sum = 0;
+  for (tmp = 0; hlen > 0; hlen -= 2) {
+    tmp += *bp++;
+  }
+  tmp = (tmp & 0xffff) + (tmp >> 16);
+  tmp = (tmp & 0xffff) + (tmp >> 16);
+  cs->cs_ip.ip_sum = (u_short)(~tmp);
+  
+  /* Remove the compressed header and prepend the uncompressed header. */
+  if(pbuf_header(n0, -((s16_t)(vjlen)))) {
+    /* Can we cope with this failing?  Just assert for now */
+    LWIP_ASSERT("pbuf_header failed\n", 0);
+    goto bad;
+  }
+
+  if(LWIP_MEM_ALIGN(n0->payload) != n0->payload) {
+    struct pbuf *np, *q;
+    u8_t *bufptr;
+
+    np = pbuf_alloc(PBUF_RAW, n0->len + cs->cs_hlen, PBUF_POOL);
+    if(!np) {
+      PPPDEBUG((LOG_WARNING, "vj_uncompress_tcp: realign failed\n"));
+      goto bad;
+    }
+
+    if(pbuf_header(np, -cs->cs_hlen)) {
+      /* Can we cope with this failing?  Just assert for now */
+      LWIP_ASSERT("pbuf_header failed\n", 0);
+      goto bad;
+    }
+
+    bufptr = n0->payload;
+    for(q = np; q != NULL; q = q->next) {
+      MEMCPY(q->payload, bufptr, q->len);
+      bufptr += q->len;
+    }
+
+    if(n0->next) {
+      pbuf_chain(np, n0->next);
+      pbuf_dechain(n0);
+    }
+    pbuf_free(n0);
+    n0 = np;
+  }
+
+  if(pbuf_header(n0, cs->cs_hlen)) {
+    struct pbuf *np;
+
+    LWIP_ASSERT("vj_uncompress_tcp: cs->cs_hlen <= PBUF_POOL_BUFSIZE", cs->cs_hlen <= PBUF_POOL_BUFSIZE);
+    np = pbuf_alloc(PBUF_RAW, cs->cs_hlen, PBUF_POOL);
+    if(!np) {
+      PPPDEBUG((LOG_WARNING, "vj_uncompress_tcp: prepend failed\n"));
+      goto bad;
+    }
+    pbuf_cat(np, n0);
+    n0 = np;
+  }
+  LWIP_ASSERT("n0->len >= cs->cs_hlen", n0->len >= cs->cs_hlen);
+  MEMCPY(n0->payload, &cs->cs_ip, cs->cs_hlen);
+
+  *nb = n0;
+
+  return vjlen;
+
+bad:
+  comp->flags |= VJF_TOSS;
+  INCR(vjs_errorin);
+  return (-1);
+}
+
+#endif /* VJ_SUPPORT */
+
+#endif /* PPP_SUPPORT */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vj.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vj.h
new file mode 100644
index 000000000..b9617da4d
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vj.h
@@ -0,0 +1,155 @@
+/*
+ * Definitions for tcp compression routines.
+ *
+ * $Id: vj.h,v 1.5 2007/12/19 20:47:23 fbernon Exp $
+ *
+ * Copyright (c) 1989 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989:
+ * - Initial distribution.
+ */
+
+#ifndef VJ_H
+#define VJ_H
+
+#include "vjbsdhdr.h"
+
+#define MAX_SLOTS 16 /* must be > 2 and < 256 */
+#define MAX_HDR   128
+
+/*
+ * Compressed packet format:
+ *
+ * The first octet contains the packet type (top 3 bits), TCP
+ * 'push' bit, and flags that indicate which of the 4 TCP sequence
+ * numbers have changed (bottom 5 bits).  The next octet is a
+ * conversation number that associates a saved IP/TCP header with
+ * the compressed packet.  The next two octets are the TCP checksum
+ * from the original datagram.  The next 0 to 15 octets are
+ * sequence number changes, one change per bit set in the header
+ * (there may be no changes and there are two special cases where
+ * the receiver implicitly knows what changed -- see below).
+ * 
+ * There are 5 numbers which can change (they are always inserted
+ * in the following order): TCP urgent pointer, window,
+ * acknowlegement, sequence number and IP ID.  (The urgent pointer
+ * is different from the others in that its value is sent, not the
+ * change in value.)  Since typical use of SLIP links is biased
+ * toward small packets (see comments on MTU/MSS below), changes
+ * use a variable length coding with one octet for numbers in the
+ * range 1 - 255 and 3 octets (0, MSB, LSB) for numbers in the
+ * range 256 - 65535 or 0.  (If the change in sequence number or
+ * ack is more than 65535, an uncompressed packet is sent.)
+ */
+
+/*
+ * Packet types (must not conflict with IP protocol version)
+ *
+ * The top nibble of the first octet is the packet type.  There are
+ * three possible types: IP (not proto TCP or tcp with one of the
+ * control flags set); uncompressed TCP (a normal IP/TCP packet but
+ * with the 8-bit protocol field replaced by an 8-bit connection id --
+ * this type of packet syncs the sender & receiver); and compressed
+ * TCP (described above).
+ *
+ * LSB of 4-bit field is TCP "PUSH" bit (a worthless anachronism) and
+ * is logically part of the 4-bit "changes" field that follows.  Top
+ * three bits are actual packet type.  For backward compatibility
+ * and in the interest of conserving bits, numbers are chosen so the
+ * IP protocol version number (4) which normally appears in this nibble
+ * means "IP packet".
+ */
+
+/* packet types */
+#define TYPE_IP               0x40
+#define TYPE_UNCOMPRESSED_TCP 0x70
+#define TYPE_COMPRESSED_TCP   0x80
+#define TYPE_ERROR            0x00
+
+/* Bits in first octet of compressed packet */
+#define NEW_C 0x40 /* flag bits for what changed in a packet */
+#define NEW_I 0x20
+#define NEW_S 0x08
+#define NEW_A 0x04
+#define NEW_W 0x02
+#define NEW_U 0x01
+
+/* reserved, special-case values of above */
+#define SPECIAL_I (NEW_S|NEW_W|NEW_U) /* echoed interactive traffic */
+#define SPECIAL_D (NEW_S|NEW_A|NEW_W|NEW_U) /* unidirectional data */
+#define SPECIALS_MASK (NEW_S|NEW_A|NEW_W|NEW_U)
+
+#define TCP_PUSH_BIT 0x10
+
+
+/*
+ * "state" data for each active tcp conversation on the wire.  This is
+ * basically a copy of the entire IP/TCP header from the last packet
+ * we saw from the conversation together with a small identifier
+ * the transmit & receive ends of the line use to locate saved header.
+ */
+struct cstate {
+  struct cstate *cs_next; /* next most recently used state (xmit only) */
+  u_short cs_hlen;        /* size of hdr (receive only) */
+  u_char cs_id;           /* connection # associated with this state */
+  u_char cs_filler;
+  union {
+    char csu_hdr[MAX_HDR];
+    struct ip csu_ip;     /* ip/tcp hdr from most recent packet */
+  } vjcs_u;
+};
+#define cs_ip vjcs_u.csu_ip
+#define cs_hdr vjcs_u.csu_hdr
+
+
+struct vjstat {
+  unsigned long vjs_packets;        /* outbound packets */
+  unsigned long vjs_compressed;     /* outbound compressed packets */
+  unsigned long vjs_searches;       /* searches for connection state */
+  unsigned long vjs_misses;         /* times couldn't find conn. state */
+  unsigned long vjs_uncompressedin; /* inbound uncompressed packets */
+  unsigned long vjs_compressedin;   /* inbound compressed packets */
+  unsigned long vjs_errorin;        /* inbound unknown type packets */
+  unsigned long vjs_tossed;         /* inbound packets tossed because of error */
+};
+
+/*
+ * all the state data for one serial line (we need one of these per line).
+ */
+struct vjcompress {
+  struct cstate *last_cs;          /* most recently used tstate */
+  u_char last_recv;                /* last rcvd conn. id */
+  u_char last_xmit;                /* last sent conn. id */
+  u_short flags;
+  u_char maxSlotIndex;
+  u_char compressSlot;             /* Flag indicating OK to compress slot ID. */
+#if LINK_STATS
+  struct vjstat stats;
+#endif
+  struct cstate tstate[MAX_SLOTS]; /* xmit connection states */
+  struct cstate rstate[MAX_SLOTS]; /* receive connection states */
+};
+
+/* flag values */
+#define VJF_TOSS 1U /* tossing rcvd frames because of input err */
+
+extern void  vj_compress_init    (struct vjcompress *comp);
+extern u_int vj_compress_tcp     (struct vjcompress *comp, struct pbuf *pb);
+extern void  vj_uncompress_err   (struct vjcompress *comp);
+extern int   vj_uncompress_uncomp(struct pbuf *nb, struct vjcompress *comp);
+extern int   vj_uncompress_tcp   (struct pbuf **nb, struct vjcompress *comp);
+
+#endif /* VJ_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vjbsdhdr.h b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vjbsdhdr.h
new file mode 100644
index 000000000..f46267614
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/ppp/vjbsdhdr.h
@@ -0,0 +1,75 @@
+#ifndef VJBSDHDR_H
+#define VJBSDHDR_H
+
+#include "lwip/tcp.h"
+
+/*
+ * Structure of an internet header, naked of options.
+ *
+ * We declare ip_len and ip_off to be short, rather than u_short
+ * pragmatically since otherwise unsigned comparisons can result
+ * against negative integers quite easily, and fail in subtle ways.
+ */
+PACK_STRUCT_BEGIN
+struct ip
+{
+#if defined(NO_CHAR_BITFIELDS)
+  u_char   ip_hl_v;  /* bug in GCC for mips means the bitfield stuff will sometimes break - so we use a char for both and get round it with macro's instead... */
+#else
+#if BYTE_ORDER == LITTLE_ENDIAN
+  unsigned ip_hl:4,              /* header length */
+           ip_v :4;              /* version */
+#elif BYTE_ORDER == BIG_ENDIAN 
+  unsigned ip_v :4,              /* version */
+           ip_hl:4;              /* header length */
+#else
+  COMPLAIN - NO BYTE ORDER SELECTED!
+#endif
+#endif
+  u_char  ip_tos;                /* type of service */
+  u_short ip_len;                /* total length */
+  u_short ip_id;                 /* identification */
+  u_short ip_off;                /* fragment offset field */
+#define  IP_DF 0x4000            /* dont fragment flag */
+#define  IP_MF 0x2000            /* more fragments flag */
+#define  IP_OFFMASK 0x1fff       /* mask for fragmenting bits */
+  u_char  ip_ttl;                /* time to live */
+  u_char  ip_p;                  /* protocol */
+  u_short ip_sum;                /* checksum */
+  struct  in_addr ip_src,ip_dst; /* source and dest address */
+};
+PACK_STRUCT_END
+
+typedef u32_t tcp_seq;
+
+/*
+ * TCP header.
+ * Per RFC 793, September, 1981.
+ */
+PACK_STRUCT_BEGIN
+struct tcphdr  
+{
+  u_short  th_sport;    /* source port */
+  u_short  th_dport;    /* destination port */
+  tcp_seq  th_seq;      /* sequence number */
+  tcp_seq  th_ack;      /* acknowledgement number */
+#if defined(NO_CHAR_BITFIELDS)
+  u_char   th_x2_off;
+#else
+#if BYTE_ORDER == LITTLE_ENDIAN
+  unsigned th_x2 :4,    /* (unused) */
+           th_off:4;    /* data offset */
+#endif
+#if BYTE_ORDER == BIG_ENDIAN 
+  unsigned th_off:4,    /* data offset */
+           th_x2 :4;    /* (unused) */
+#endif
+#endif
+  u_char   th_flags;
+  u_short  th_win;      /* window */
+  u_short  th_sum;      /* checksum */
+  u_short  th_urp;      /* urgent pointer */
+};
+PACK_STRUCT_END
+
+#endif /* VJBSDHDR_H */
diff --git a/firmware/x300/lwip/lwip-1.3.1/src/netif/slipif.c b/firmware/x300/lwip/lwip-1.3.1/src/netif/slipif.c
new file mode 100644
index 000000000..6cb2db442
--- /dev/null
+++ b/firmware/x300/lwip/lwip-1.3.1/src/netif/slipif.c
@@ -0,0 +1,279 @@
+/**
+ * @file
+ * SLIP Interface
+ *
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * This file is built upon the file: src/arch/rtxc/netif/sioslip.c
+ *
+ * Author: Magnus Ivarsson <magnus.ivarsson(at)volvo.com> 
+ */
+
+/* 
+ * This is an arch independent SLIP netif. The specific serial hooks must be
+ * provided by another file. They are sio_open, sio_recv and sio_send
+ */
+
+#include "netif/slipif.h"
+#include "lwip/opt.h"
+
+#if LWIP_HAVE_SLIPIF
+
+#include "lwip/def.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+#include "lwip/stats.h"
+#include "lwip/snmp.h"
+#include "lwip/sio.h"
+
+#define SLIP_END     0300 /* 0xC0 */
+#define SLIP_ESC     0333 /* 0xDB */
+#define SLIP_ESC_END 0334 /* 0xDC */
+#define SLIP_ESC_ESC 0335 /* 0xDD */
+
+#define MAX_SIZE     1500
+
+/**
+ * Send a pbuf doing the necessary SLIP encapsulation
+ *
+ * Uses the serial layer's sio_send()
+ *
+ * @param netif the lwip network interface structure for this slipif
+ * @param p the pbuf chaing packet to send
+ * @param ipaddr the ip address to send the packet to (not used for slipif)
+ * @return always returns ERR_OK since the serial layer does not provide return values
+ */
+err_t
+slipif_output(struct netif *netif, struct pbuf *p, struct ip_addr *ipaddr)
+{
+  struct pbuf *q;
+  u16_t i;
+  u8_t c;
+
+  LWIP_ASSERT("netif != NULL", (netif != NULL));
+  LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
+  LWIP_ASSERT("p != NULL", (p != NULL));
+
+  LWIP_UNUSED_ARG(ipaddr);
+
+  /* Send pbuf out on the serial I/O device. */
+  sio_send(SLIP_END, netif->state);
+
+  for (q = p; q != NULL; q = q->next) {
+    for (i = 0; i < q->len; i++) {
+      c = ((u8_t *)q->payload)[i];
+      switch (c) {
+      case SLIP_END:
+        sio_send(SLIP_ESC, netif->state);
+        sio_send(SLIP_ESC_END, netif->state);
+        break;
+      case SLIP_ESC:
+        sio_send(SLIP_ESC, netif->state);
+        sio_send(SLIP_ESC_ESC, netif->state);
+        break;
+      default:
+        sio_send(c, netif->state);
+        break;
+      }
+    }
+  }
+  sio_send(SLIP_END, netif->state);
+  return ERR_OK;
+}
+
+/**
+ * Handle the incoming SLIP stream character by character
+ *
+ * Poll the serial layer by calling sio_recv()
+ *
+ * @param netif the lwip network interface structure for this slipif
+ * @return The IP packet when SLIP_END is received 
+ */
+static struct pbuf *
+slipif_input(struct netif *netif)
+{
+  u8_t c;
+  /* q is the whole pbuf chain for a packet, p is the current pbuf in the chain */
+  struct pbuf *p, *q;
+  u16_t recved;
+  u16_t i;
+
+  LWIP_ASSERT("netif != NULL", (netif != NULL));
+  LWIP_ASSERT("netif->state != NULL", (netif->state != NULL));
+
+  q = p = NULL;
+  recved = i = 0;
+  c = 0;
+
+  while (1) {
+    c = sio_recv(netif->state);
+    switch (c) {
+    case SLIP_END:
+      if (recved > 0) {
+        /* Received whole packet. */
+        /* Trim the pbuf to the size of the received packet. */
+        pbuf_realloc(q, recved);
+        
+        LINK_STATS_INC(link.recv);
+        
+        LWIP_DEBUGF(SLIP_DEBUG, ("slipif: Got packet\n"));
+        return q;
+      }
+      break;
+
+    case SLIP_ESC:
+      c = sio_recv(netif->state);
+      switch (c) {
+      case SLIP_ESC_END:
+        c = SLIP_END;
+        break;
+      case SLIP_ESC_ESC:
+        c = SLIP_ESC;
+        break;
+      }
+      /* FALLTHROUGH */
+
+    default:
+      /* byte received, packet not yet completely received */
+      if (p == NULL) {
+        /* allocate a new pbuf */
+        LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: alloc\n"));
+        p = pbuf_alloc(PBUF_LINK, PBUF_POOL_BUFSIZE, PBUF_POOL);
+
+        if (p == NULL) {
+          LINK_STATS_INC(link.drop);
+          LWIP_DEBUGF(SLIP_DEBUG, ("slipif_input: no new pbuf! (DROP)\n"));
+          /* don't process any further since we got no pbuf to receive to */
+          break;
+        }
+
+        if (q != NULL) {
+          /* 'chain' the pbuf to the existing chain */
+          pbuf_cat(q, p);
+        } else {
+          /* p is the first pbuf in the chain */
+          q = p;
+        }
+      }
+
+      /* this automatically drops bytes if > MAX_SIZE */
+      if ((p != NULL) && (recved <= MAX_SIZE)) {
+        ((u8_t *)p->payload)[i] = c;
+        recved++;
+        i++;
+        if (i >= p->len) {
+          /* on to the next pbuf */
+          i = 0;
+          if (p->next != NULL && p->next->len > 0) {
+            /* p is a chain, on to the next in the chain */
+            p = p->next;
+          } else {
+            /* p is a single pbuf, set it to NULL so next time a new
+             * pbuf is allocated */
+            p = NULL;
+          }
+        }
+      }
+      break;
+    }
+  }
+  return NULL;
+}
+
+#if !NO_SYS
+/**
+ * The SLIP input thread.
+ *
+ * Feed the IP layer with incoming packets
+ *
+ * @param nf the lwip network interface structure for this slipif
+ */
+static void
+slipif_loop(void *nf)
+{
+  struct pbuf *p;
+  struct netif *netif = (struct netif *)nf;
+
+  while (1) {
+    p = slipif_input(netif);
+    if (p != NULL) {
+      if (netif->input(p, netif) != ERR_OK) {
+        pbuf_free(p);
+        p = NULL;
+      }
+    }
+  }
+}
+#endif /* !NO_SYS */
+
+/**
+ * SLIP netif initialization
+ *
+ * Call the arch specific sio_open and remember
+ * the opened device in the state field of the netif.
+ *
+ * @param netif the lwip network interface structure for this slipif
+ * @return ERR_OK if serial line could be opened,
+ *         ERR_IF is serial line couldn't be opened
+ *
+ * @note netif->num must contain the number of the serial port to open
+ *       (0 by default)
+ */
+err_t
+slipif_init(struct netif *netif)
+{
+
+  LWIP_DEBUGF(SLIP_DEBUG, ("slipif_init: netif->num=%"U16_F"\n", (u16_t)netif->num));
+
+  netif->name[0] = 's';
+  netif->name[1] = 'l';
+  netif->output = slipif_output;
+  netif->mtu = MAX_SIZE;
+  netif->flags = NETIF_FLAG_POINTTOPOINT;
+
+  /* Try to open the serial port (netif->num contains the port number). */
+  netif->state = sio_open(netif->num);
+  if (!netif->state) {
+    /* Opening the serial port failed. */
+    return ERR_IF;
+  }
+
+  /* initialize the snmp variables and counters inside the struct netif
+   * ifSpeed: no assumption can be made without knowing more about the
+   * serial line!
+   */
+  NETIF_INIT_SNMP(netif, snmp_ifType_slip, 0);
+
+  /* Create a thread to poll the serial line. */
+  sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop, netif, SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
+  return ERR_OK;
+}
+#endif /* LWIP_HAVE_SLIPIF */
diff --git a/firmware/x300/lwip/lwipopts.h b/firmware/x300/lwip/lwipopts.h
new file mode 100644
index 000000000..3839eea83
--- /dev/null
+++ b/firmware/x300/lwip/lwipopts.h
@@ -0,0 +1,196 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2009 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/*
+ * Our lwip options
+ */
+
+#define NO_SYS				1
+
+
+// ---------- Memory options ----------
+/**
+ * MEM_ALIGNMENT: should be set to the alignment of the CPU
+ *    4 byte alignment -> #define MEM_ALIGNMENT 4
+ *    2 byte alignment -> #define MEM_ALIGNMENT 2
+ */
+#define MEM_ALIGNMENT      		4
+
+/**
+ * MEM_SIZE: the size of the heap memory. If the application will send
+ * a lot of data that needs to be copied, this should be set high.
+ */
+#define MEM_SIZE        		256
+
+/**
+ * MEM_USE_POOLS==1: Use an alternative to malloc() by allocating from a set
+ * of memory pools of various sizes. When mem_malloc is called, an element of
+ * the smallest pool that can provide the lenght needed is returned.
+ */
+#define MEM_USE_POOLS                   0
+
+/**
+ * MEMP_USE_CUSTOM_POOLS==1: whether to include a user file lwippools.h
+ * that defines additional pools beyond the "standard" ones required
+ * by lwIP. If you set this to 1, you must have lwippools.h in your 
+ * inlude path somewhere. 
+ */
+#define MEMP_USE_CUSTOM_POOLS           0
+
+// ---------- Internal Memory Pool Sizes ----------
+/**
+ * MEMP_NUM_PBUF: the number of memp struct pbufs (used for PBUF_ROM and PBUF_REF).
+ * If the application sends a lot of data out of ROM (or other static memory),
+ * this should be set high.
+ */
+#define MEMP_NUM_PBUF                   8
+
+/**
+ * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
+ * per active UDP "connection".
+ * (requires the LWIP_UDP option)
+ */
+#define MEMP_NUM_UDP_PCB                4
+
+/**
+ * PBUF_LINK_HLEN: the number of bytes that should be allocated for a
+ * link level header. The default is 14, the standard value for
+ * Ethernet.
+ */
+#define PBUF_LINK_HLEN                  16
+#define	ETH_PAD_SIZE			2
+
+/**
+ * PBUF_POOL_SIZE: the number of buffers in the pbuf pool. 
+ */
+#define PBUF_POOL_SIZE                  8
+
+/**
+ * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is
+ * designed to accomodate single full size TCP frame in one pbuf, including
+ * TCP_MSS, IP header, and link header.
+ */
+//#define PBUF_POOL_BUFSIZE               LWIP_MEM_ALIGN_SIZE(TCP_MSS+40+PBUF_LINK_HLEN)
+#define PBUF_POOL_BUFSIZE               LWIP_MEM_ALIGN_SIZE(128+28+PBUF_LINK_HLEN)
+
+
+// ---------- ARP options ----------
+/**
+ * ARP_TABLE_SIZE: Number of active MAC-IP address pairs cached.
+ */
+#define ARP_TABLE_SIZE                  5
+
+/**
+ * ARP_QUEUEING==1: Outgoing packets are queued during hardware address
+ * resolution.
+ */
+#define ARP_QUEUEING                    0
+
+/**
+ * MEMP_NUM_ARP_QUEUE: the number of simulateously queued outgoing
+ * packets (pbufs) that are waiting for an ARP request (to resolve
+ * their destination address) to finish.
+ * (requires the ARP_QUEUEING option)
+ */
+#define MEMP_NUM_ARP_QUEUE              5
+
+// ---------- IP options ----------
+/**
+ * IP_OPTIONS_ALLOWED: Defines the behavior for IP options.
+ *      IP_OPTIONS_ALLOWED==0: All packets with IP options are dropped.
+ *      IP_OPTIONS_ALLOWED==1: IP options are allowed (but not parsed).
+ */
+#define IP_OPTIONS_ALLOWED              0
+
+/**
+ * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that
+ * this option does not affect outgoing packet sizes, which can be controlled
+ * via IP_FRAG.
+ */
+#define IP_REASSEMBLY                   0
+
+/**
+ * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
+ * that this option does not affect incoming packet sizes, which can be
+ * controlled via IP_REASSEMBLY.
+ */
+#define IP_FRAG                         0
+
+/**
+ * LWIP_DHCP==1: Enable DHCP module.
+ */
+#define LWIP_DHCP                       0
+
+/**
+ * LWIP_IGMP==1: Turn on IGMP module. 
+ */
+#define LWIP_IGMP                       0
+
+/**
+ * LWIP_UDP==1: Turn on UDP.
+ */
+#define LWIP_UDP                        1
+
+/**
+ * LWIP_TCP==1: Turn on TCP.
+ */
+#define LWIP_TCP                        0
+
+/**
+ * LWIP_NETCONN==1: Enable Netconn API (require to use api_lib.c)
+ */
+#define LWIP_NETCONN                    0
+
+/**
+ * LWIP_SOCKET==1: Enable Socket API (require to use sockets.c)
+ */
+#define LWIP_SOCKET                     0
+
+/**
+ * LWIP_STATS==1: Enable statistics collection in lwip_stats.
+ */
+#define LWIP_STATS                      0
+
+/**
+ * CHECKSUM_GEN_IP==1: Generate checksums in software for outgoing IP packets.
+ */
+#define CHECKSUM_GEN_IP                 0
+ 
+/**
+ * CHECKSUM_GEN_UDP==1: Generate checksums in software for outgoing UDP packets.
+ */
+#define CHECKSUM_GEN_UDP                0
+ 
+/**
+ * CHECKSUM_CHECK_IP==1: Check checksums in software for incoming IP packets.
+ */
+#define CHECKSUM_CHECK_IP               0
+
+/**
+ * CHECKSUM_CHECK_UDP==1: Check checksums in software for incoming UDP packets.
+ */
+#define CHECKSUM_CHECK_UDP              0
+
+/**
+ * LWIP_NETIF_LINK_CALLBACK==1: Support a callback function from an interface
+ * whenever the link changes (i.e., link down)
+ */
+#define LWIP_NETIF_LINK_CALLBACK        1
diff --git a/firmware/x300/lwip/lwippools.h b/firmware/x300/lwip/lwippools.h
new file mode 100644
index 000000000..caee23c82
--- /dev/null
+++ b/firmware/x300/lwip/lwippools.h
@@ -0,0 +1,24 @@
+#ifndef INCLUDED_LWIPPOOLS_H
+#define INCLUDED_LWIPPOOLS_H
+
+/*
+ * from comment at top of mem.c:
+ *
+ * To let mem_malloc() use pools (prevents fragmentation and is much faster than
+ * a heap but might waste some memory), define MEM_USE_POOLS to 1, define
+ * MEM_USE_CUSTOM_POOLS to 1 and create a file "lwippools.h" that includes a list
+ * of pools like this (more pools can be added between _START and _END):
+ *
+ * Define three pools with sizes 256, 512, and 1512 bytes
+ * LWIP_MALLOC_MEMPOOL_START
+ * LWIP_MALLOC_MEMPOOL(20, 256)
+ * LWIP_MALLOC_MEMPOOL(10, 512)
+ * LWIP_MALLOC_MEMPOOL(5, 1512)
+ * LWIP_MALLOC_MEMPOOL_END
+ */
+
+LWIP_MALLOC_MEMPOOL_START
+LWIP_MALLOC_MEMPOOL(2, 256)
+LWIP_MALLOC_MEMPOOL_END
+
+#endif /* INCLUDED_LWIPPOOLS_H */
diff --git a/firmware/x300/lwip_port/arch/cc.h b/firmware/x300/lwip_port/arch/cc.h
new file mode 100644
index 000000000..d8d53ecf8
--- /dev/null
+++ b/firmware/x300/lwip_port/arch/cc.h
@@ -0,0 +1,65 @@
+#ifndef INCLUDED_ARCH_CC_H
+#define INCLUDED_ARCH_CC_H
+
+#define BYTE_ORDER BIG_ENDIAN
+
+
+#if 1
+#include <stdint.h>
+
+typedef uint8_t    u8_t;
+typedef int8_t     s8_t;
+typedef uint16_t   u16_t;
+typedef int16_t    s16_t;
+typedef uint32_t   u32_t;
+typedef int32_t    s32_t;
+
+#else
+
+typedef unsigned   char    u8_t;
+typedef signed     char    s8_t;
+typedef unsigned   short   u16_t;
+typedef signed     short   s16_t;
+typedef unsigned   long    u32_t;
+typedef signed     long    s32_t;
+#endif
+
+typedef u32_t mem_ptr_t;
+
+#if 1   /* minimal printf */
+#define U16_F "u"
+#define S16_F "d"
+#define X16_F "x"
+#define U32_F "u"
+#define S32_F "d"
+#define X32_F "x"
+
+#else
+
+#define U16_F "hu"
+#define S16_F "hd"
+#define X16_F "hx"
+#define U32_F "lu"
+#define S32_F "ld"
+#define X32_F "lx"
+#endif
+
+#if 1	// gcc: don't pack
+#define PACK_STRUCT_FIELD(x) x
+#define PACK_STRUCT_STRUCT
+#define PACK_STRUCT_BEGIN
+#define PACK_STRUCT_END
+#else	// gcc: do pack
+#define PACK_STRUCT_FIELD(x) x
+#define PACK_STRUCT_STRUCT __attribute__((packed))
+#define PACK_STRUCT_BEGIN
+#define PACK_STRUCT_END
+#endif
+
+//#define LWIP_PLATFORM_ASSERT(msg) ((void)0)
+void abort(void);
+#define LWIP_PLATFORM_ASSERT(msg) abort()
+
+
+#endif /* INCLUDED_ARCH_CC_H */
+
diff --git a/firmware/x300/lwip_port/arch/perf.h b/firmware/x300/lwip_port/arch/perf.h
new file mode 100644
index 000000000..f0906d03f
--- /dev/null
+++ b/firmware/x300/lwip_port/arch/perf.h
@@ -0,0 +1,2 @@
+#define PERF_START     ((void) 0)
+#define PERF_STOP(msg) ((void) 0)
diff --git a/firmware/x300/lwip_port/netif/eth_driver.c b/firmware/x300/lwip_port/netif/eth_driver.c
new file mode 100644
index 000000000..18c6eaf3e
--- /dev/null
+++ b/firmware/x300/lwip_port/netif/eth_driver.c
@@ -0,0 +1,303 @@
+/**
+ * @file
+ * Ethernet Interface for quadradio
+ */
+
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * Copyright (c) 2010 Ettus Research LLC
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+#include "lwip/opt.h"
+
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+#include <lwip/stats.h>
+#include <lwip/snmp.h>
+#include "netif/etharp.h"
+#include "netif/ppp_oe.h"
+#include "eth_driver.h"
+
+#if 0	// don't build
+
+/* Define those to better describe your network interface. */
+#define IFNAME0 'e'
+#define IFNAME1 'n'
+
+/**
+ * Helper struct to hold private data used to operate your ethernet interface.
+ */
+struct quadradioif {
+  int	ethno;
+};
+
+/* Forward declarations. */
+static void  quadradioif_input(struct netif *netif);
+
+/**
+ * In this function, the hardware should be initialized.
+ * Called from quadradioif_init().
+ *
+ * @param netif the already initialized lwip network interface structure
+ *        for this quadradioif
+ */
+static void
+low_level_init(struct netif *netif)
+{
+  struct quadradioif *quadradioif = netif->state;
+  
+  /* set MAC hardware address length */
+  netif->hwaddr_len = ETHARP_HWADDR_LEN;
+
+  /* set MAC hardware address */
+  netif->hwaddr[0] = ;
+  ...
+  netif->hwaddr[5] = ;
+
+  /* maximum transfer unit */
+  netif->mtu = 1500;
+  
+  /* device capabilities */
+  /* don't set NETIF_FLAG_ETHARP if this device is not an ethernet one */
+  netif->flags = NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP | NETIF_FLAG_LINK_UP;
+ 
+  /* Do whatever else is needed to initialize interface. */  
+}
+
+/**
+ * This function should do the actual transmission of the packet. The packet is
+ * contained in the pbuf that is passed to the function. This pbuf
+ * might be chained.
+ *
+ * @param netif the lwip network interface structure for this quadradioif
+ * @param p the MAC packet to send (e.g. IP packet including MAC addresses and type)
+ * @return ERR_OK if the packet could be sent
+ *         an err_t value if the packet couldn't be sent
+ *
+ * @note Returning ERR_MEM here if a DMA queue of your MAC is full can lead to
+ *       strange results. You might consider waiting for space in the DMA queue
+ *       to become availale since the stack doesn't retry to send a packet
+ *       dropped because of memory failure (except for the TCP timers).
+ */
+
+static err_t
+low_level_output(struct netif *netif, struct pbuf *p)
+{
+  struct quadradioif *quadradioif = netif->state;
+  struct pbuf *q;
+
+  initiate transfer();
+  
+#if ETH_PAD_SIZE
+  pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
+#endif
+
+  for(q = p; q != NULL; q = q->next) {
+    /* Send the data from the pbuf to the interface, one pbuf at a
+       time. The size of the data in each pbuf is kept in the ->len
+       variable. */
+    send data from(q->payload, q->len);
+  }
+
+  signal that packet should be sent();
+
+#if ETH_PAD_SIZE
+  pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
+#endif
+  
+  LINK_STATS_INC(link.xmit);
+
+  return ERR_OK;
+}
+
+/**
+ * Should allocate a pbuf and transfer the bytes of the incoming
+ * packet from the interface into the pbuf.
+ *
+ * @param netif the lwip network interface structure for this quadradioif
+ * @return a pbuf filled with the received packet (including MAC header)
+ *         NULL on memory error
+ */
+static struct pbuf *
+low_level_input(struct netif *netif)
+{
+  struct quadradioif *quadradioif = netif->state;
+  struct pbuf *p, *q;
+  u16_t len;
+
+  /* Obtain the size of the packet and put it into the "len"
+     variable. */
+  len = ;
+
+#if ETH_PAD_SIZE
+  len += ETH_PAD_SIZE; /* allow room for Ethernet padding */
+#endif
+
+  /* We allocate a pbuf chain of pbufs from the pool. */
+  p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
+  
+  if (p != NULL) {
+
+#if ETH_PAD_SIZE
+    pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
+#endif
+
+    /* We iterate over the pbuf chain until we have read the entire
+     * packet into the pbuf. */
+    for(q = p; q != NULL; q = q->next) {
+      /* Read enough bytes to fill this pbuf in the chain. The
+       * available data in the pbuf is given by the q->len
+       * variable. */
+      read data into(q->payload, q->len);
+    }
+    acknowledge that packet has been read();
+
+#if ETH_PAD_SIZE
+    pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
+#endif
+
+    LINK_STATS_INC(link.recv);
+  } else {
+    drop packet();
+    LINK_STATS_INC(link.memerr);
+    LINK_STATS_INC(link.drop);
+  }
+
+  return p;  
+}
+
+/**
+ * This function should be called when a packet is ready to be read
+ * from the interface. It uses the function low_level_input() that
+ * should handle the actual reception of bytes from the network
+ * interface. Then the type of the received packet is determined and
+ * the appropriate input function is called.
+ *
+ * @param netif the lwip network interface structure for this quadradioif
+ */
+static void
+quadradioif_input(struct netif *netif)
+{
+  struct quadradioif *quadradioif;
+  struct eth_hdr *ethhdr;
+  struct pbuf *p;
+
+  quadradioif = netif->state;
+
+  /* move received packet into a new pbuf */
+  p = low_level_input(netif);
+  /* no packet could be read, silently ignore this */
+  if (p == NULL) return;
+  /* points to packet payload, which starts with an Ethernet header */
+  ethhdr = p->payload;
+
+  switch (htons(ethhdr->type)) {
+  /* IP or ARP packet? */
+  case ETHTYPE_IP:
+  case ETHTYPE_ARP:
+#if PPPOE_SUPPORT
+  /* PPPoE packet? */
+  case ETHTYPE_PPPOEDISC:
+  case ETHTYPE_PPPOE:
+#endif /* PPPOE_SUPPORT */
+    /* full packet send to tcpip_thread to process */
+    if (netif->input(p, netif)!=ERR_OK)
+     { LWIP_DEBUGF(NETIF_DEBUG, ("quadradioif_input: IP input error\n"));
+       pbuf_free(p);
+       p = NULL;
+     }
+    break;
+
+  default:
+    pbuf_free(p);
+    p = NULL;
+    break;
+  }
+}
+
+/**
+ * Should be called at the beginning of the program to set up the
+ * network interface. It calls the function low_level_init() to do the
+ * actual setup of the hardware.
+ *
+ * This function should be passed as a parameter to netif_add().
+ *
+ * @param netif the lwip network interface structure for this quadradioif
+ * @return ERR_OK if the loopif is initialized
+ *         ERR_MEM if private data couldn't be allocated
+ *         any other err_t on error
+ */
+err_t
+quadradioif_init(struct netif *netif)
+{
+  struct quadradioif *quadradioif;
+
+  LWIP_ASSERT("netif != NULL", (netif != NULL));
+    
+  quadradioif = mem_malloc(sizeof(struct quadradioif));
+  if (quadradioif == NULL) {
+    LWIP_DEBUGF(NETIF_DEBUG, ("quadradioif_init: out of memory\n"));
+    return ERR_MEM;
+  }
+
+#if LWIP_NETIF_HOSTNAME
+  /* Initialize interface hostname */
+  netif->hostname = "lwip";
+#endif /* LWIP_NETIF_HOSTNAME */
+
+  /*
+   * Initialize the snmp variables and counters inside the struct netif.
+   * The last argument should be replaced with your link speed, in units
+   * of bits per second.
+   */
+  NETIF_INIT_SNMP(netif, snmp_ifType_ethernet_csmacd, LINK_SPEED_OF_YOUR_NETIF_IN_BPS);
+
+  netif->state = quadradioif;
+  netif->name[0] = IFNAME0;
+  netif->name[1] = IFNAME1;
+  /* We directly use etharp_output() here to save a function call.
+   * You can instead declare your own function an call etharp_output()
+   * from it if you have to do some checks before sending (e.g. if link
+   * is available...) */
+  netif->output = etharp_output;
+  netif->linkoutput = low_level_output;
+  
+  quadradioif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
+  
+  /* initialize the hardware */
+  low_level_init(netif);
+
+  return ERR_OK;
+}
+
+#endif /* 0 */
diff --git a/firmware/x300/lwip_port/netif/eth_driver.h b/firmware/x300/lwip_port/netif/eth_driver.h
new file mode 100644
index 000000000..72a212091
--- /dev/null
+++ b/firmware/x300/lwip_port/netif/eth_driver.h
@@ -0,0 +1,23 @@
+/* -*- c -*- */
+/*
+ * Copyright 2010 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qpn_port.h"
+
+void eth_driver_init(QActive *);
+void eth_driver_handle_input(int ethno, int bufno, size_t nbytes);
+void eth_driver_buffer_sig(int bufno);
diff --git a/firmware/x300/x300/CMakeLists.txt b/firmware/x300/x300/CMakeLists.txt
new file mode 100644
index 000000000..f4cddd2c3
--- /dev/null
+++ b/firmware/x300/x300/CMakeLists.txt
@@ -0,0 +1,35 @@
+#
+# Copyright 2010-2013 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+include_directories(${CMAKE_SOURCE_DIR}/../../host/lib/usrp/x300)
+
+list(APPEND x300_sources x300_init.c x300_main.c)
+
+########################################################################
+set(GEN_OUTPUTS_BIN_SIZE 0x7fff)
+
+add_executable(x300_main.elf ${x300_sources})
+target_link_libraries(x300_main.elf usrpfw)
+GEN_OUTPUTS(x300_main.elf)
+
+INSTALL(
+    FILES ${CMAKE_CURRENT_BINARY_DIR}/x300_main.bin
+    DESTINATION share/uhd/images
+    RENAME usrp_x300_fw.bin
+)
diff --git a/firmware/x300/x300/x300_defs.h b/firmware/x300/x300/x300_defs.h
new file mode 100644
index 000000000..02c3d4808
--- /dev/null
+++ b/firmware/x300/x300/x300_defs.h
@@ -0,0 +1,75 @@
+
+// Copyright 2012 Ettus Research LLC
+
+#ifndef INCLUDED_B250_DEFS_H
+#define INCLUDED_B250_DEFS_H
+
+#define CPU_CLOCK 175000000
+#define MAIN_RAM_BASE 0x0000
+#define PKT_RAM0_BASE 0x8000
+#define XGE0_BASE 0xC000
+#define XGE1_BASE 0xD000
+#define BOOT_LDR_BASE 0xFC00
+#define UART0_BASE 0xfd00
+#define UART0_BAUD 115200
+#define UART1_BASE 0xf900
+#define UART1_BAUD 115200
+#define I2C0_BASE 0xfe00
+#define I2C1_BASE 0xff00
+#define I2C2_BASE 0xfc00
+#define SET0_BASE 0xa000
+#define RB0_BASE 0xa000 //same as set
+#define SETXB_BASE 0xb000
+
+#define ETH1G
+//#define ETH10G 
+
+//eeprom map for mboard addrs
+#define MBOARD_EEPROM_ADDR 0x50
+
+// Setting Regs Memeory Map
+static const int SR_LEDS       = 0;
+static const int SR_SW_RST     = 1;
+static const int SR_CLOCK_CTRL = 2;
+static const int SR_XB_LOCAL   = 3;
+static const int SR_SFPP_CTRL  = 4;
+static const int SR_SPI        = 32;
+static const int SR_ETHINT0    = 40;
+static const int SR_ETHINT1    = 56;
+
+//led shifts for SR_LEDS
+static const int LED_ACT1 = (1 << 5);
+static const int LED_ACT2 = (1 << 4);
+static const int LED_LINK1 = (1 << 3);
+static const int LED_LINK2 = (1 << 2);
+static const int LED_LINKSTAT = (1 << 1);
+static const int LED_LINKACT = (1 << 0);
+
+// Readback Memory Map
+static const int RB_COUNTER      = 0;
+static const int RB_SPI_RDY      = 1;
+static const int RB_SPI_DATA     = 2;
+static const int RB_ETH_TYPE0    = 4;
+static const int RB_ETH_TYPE1    = 5;
+static const int RB_SFPP_STATUS0 = 8;
+static const int RB_SFPP_STATUS1 = 9;
+
+// Bootloader Memory Map
+static const int BL_ADDRESS     = 0;
+static const int BL_DATA        = 1;
+
+#define SW_RST_PHY 0x01
+#define SW_RST_RADIO 0x02
+#define SW_RST_RADIO_PLL 0x04
+
+//eth framer constants
+#define ETH_FRAMER_SRC_MAC_HI 0
+#define ETH_FRAMER_SRC_MAC_LO 1
+#define ETH_FRAMER_SRC_IP_ADDR 2
+#define ETH_FRAMER_SRC_UDP_PORT 3
+#define ETH_FRAMER_DST_RAM_ADDR 4
+#define ETH_FRAMER_DST_IP_ADDR 5
+#define ETH_FRAMER_DST_UDP_MAC 6
+#define ETH_FRAMER_DST_MAC_LO 7
+
+#endif /* INCLUDED_B250_DEFS_H */
diff --git a/firmware/x300/x300/x300_init.c b/firmware/x300/x300/x300_init.c
new file mode 100644
index 000000000..2a3ee472e
--- /dev/null
+++ b/firmware/x300/x300/x300_init.c
@@ -0,0 +1,163 @@
+#include "x300_init.h"
+#include "x300_defs.h"
+#include "ethernet.h"
+#include "mdelay.h"
+#include <wb_utils.h>
+#include <wb_uart.h>
+#include <wb_i2c.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <printf.h>
+#include <wb_pkt_iface64.h>
+#include <u3_net_stack.h>
+#include <link_state_route_proto.h>
+#include <udp_uart.h>
+#include "x300_fw_common.h"
+#include <print_addrs.h>
+
+static wb_pkt_iface64_config_t pkt_config;
+
+struct x300_eeprom_map
+{
+    //indentifying numbers
+    unsigned char revision[2];
+    unsigned char product[2];
+    uint8_t _pad0[4];
+
+    //all the mac addrs
+    uint8_t mac_addr0[6];
+    uint8_t _pad1[2];
+    uint8_t mac_addr1[6];
+    uint8_t _pad2[2];
+
+    //all the IP addrs
+    uint32_t gateway;
+    uint32_t subnet[4];
+    uint32_t ip_addr[4];
+    uint8_t _pad3[16];
+};
+
+static struct x300_eeprom_map default_map = {
+    .mac_addr0 = X300_DEFAULT_MAC_ADDR_0,
+    .mac_addr1 = X300_DEFAULT_MAC_ADDR_1,
+    .gateway = X300_DEFAULT_GATEWAY,
+    .subnet = {
+        X300_DEFAULT_NETMASK_ETH0_1G,
+        X300_DEFAULT_NETMASK_ETH1_1G,
+        X300_DEFAULT_NETMASK_ETH0_10G,
+        X300_DEFAULT_NETMASK_ETH1_10G
+    },
+    .ip_addr = {
+        X300_DEFAULT_IP_ETH0_1G,
+        X300_DEFAULT_IP_ETH1_1G,
+        X300_DEFAULT_IP_ETH0_10G,
+        X300_DEFAULT_IP_ETH1_10G
+    },
+};
+
+const void *pick_inited_field(const void *eeprom, const void *def, const size_t len)
+{
+    bool all_ones = true;
+    bool all_zeros = true;
+    for (size_t i = 0; i < len; i++)
+    {
+        const uint8_t b = ((const uint8_t *)eeprom)[i];
+        if (b != 0x00) all_zeros = false;
+        if (b != 0xff) all_ones = false;
+    }
+    if (all_zeros) return def;
+    if (all_ones) return def;
+    return eeprom;
+}
+
+static void init_network(void)
+{
+    pkt_config = wb_pkt_iface64_init(PKT_RAM0_BASE, 0x1ffc);
+    printf("PKT RAM0 BASE 0x%x\n", (&pkt_config)->base);
+    u3_net_stack_init(&pkt_config);
+    link_state_route_proto_init();
+
+    //read everything from eeprom
+    static const uint8_t eeprom_cmd[2] = {0, 0}; //the command is 16 bits of address offset
+    struct x300_eeprom_map eeprom_map = default_map;
+    wb_i2c_write(I2C1_BASE, MBOARD_EEPROM_ADDR, eeprom_cmd, 2);
+    wb_i2c_read(I2C1_BASE, MBOARD_EEPROM_ADDR, (uint8_t *)(&eeprom_map), sizeof(eeprom_map));
+
+    //determine interface number
+    const size_t eth0no = wb_peek32(SR_ADDR(RB0_BASE, RB_ETH_TYPE0))? 2 : 0;
+    const size_t eth1no = wb_peek32(SR_ADDR(RB0_BASE, RB_ETH_TYPE1))? 3 : 1;
+
+    //pick the address from eeprom or default
+    const eth_mac_addr_t *my_mac0 = (const eth_mac_addr_t *)pick_inited_field(&eeprom_map.mac_addr0, &default_map.mac_addr0, 6);
+    const eth_mac_addr_t *my_mac1 = (const eth_mac_addr_t *)pick_inited_field(&eeprom_map.mac_addr1, &default_map.mac_addr1, 6);
+    const struct ip_addr *my_ip0 = (const struct ip_addr *)pick_inited_field(&eeprom_map.ip_addr[eth0no], &default_map.ip_addr[eth0no], 4);
+    const struct ip_addr *subnet0 = (const struct ip_addr *)pick_inited_field(&eeprom_map.subnet[eth0no], &default_map.subnet[eth0no], 4);
+    const struct ip_addr *my_ip1 = (const struct ip_addr *)pick_inited_field(&eeprom_map.ip_addr[eth1no], &default_map.ip_addr[eth1no], 4);
+    const struct ip_addr *subnet1 = (const struct ip_addr *)pick_inited_field(&eeprom_map.subnet[eth1no], &default_map.subnet[eth1no], 4);
+
+    //init eth0
+    u3_net_stack_init_eth(0, my_mac0, my_ip0, subnet0);
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT0 + 8 + 0), (my_mac0->addr[5] << 0) | (my_mac0->addr[4] << 8) | (my_mac0->addr[3] << 16) | (my_mac0->addr[2] << 24));
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT0 + 8 + 1), (my_mac0->addr[1] << 0) | (my_mac0->addr[0] << 8));
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT0 + 8 + 2), my_ip0->addr);
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT0 + 8 + 4), 0/*nofwd*/);
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT0 + 8 + 5), (ICMP_IRQ << 8) | 0); //no fwd: type, code
+
+    //init eth1
+    u3_net_stack_init_eth(1, my_mac1, my_ip1, subnet1);
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT1 + 8 + 0), (my_mac1->addr[5] << 0) | (my_mac1->addr[4] << 8) | (my_mac1->addr[3] << 16) | (my_mac1->addr[2] << 24));
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT1 + 8 + 1), (my_mac1->addr[1] << 0) | (my_mac1->addr[0] << 8));
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT1 + 8 + 2), my_ip1->addr);
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT1 + 8 + 4), 0/*nofwd*/);
+    wb_poke32(SR_ADDR(SET0_BASE, SR_ETHINT1 + 8 + 5), (ICMP_IRQ << 8) | 0); //no fwd: type, code
+}
+
+static void putc(void *p, char c)
+{
+#ifdef X300_DEBUG_UART
+    wb_uart_putc(UART1_BASE, c);
+#endif
+}
+
+void x300_init(void)
+{
+    //first - uart
+    wb_uart_init(UART0_BASE, CPU_CLOCK/UART0_BAUD);
+    wb_uart_init(UART1_BASE, CPU_CLOCK/UART1_BAUD);
+    init_printf(NULL,putc);
+    //udp_uart_init(UART0_BASE, X300_GPSDO_UDP_PORT);
+
+    //now we can init the rest with prints
+    printf("X300 ZPU Init Begin -- CPU CLOCK is %d MHz\n", CPU_CLOCK/1000000);
+
+    //i2c rate init
+    wb_i2c_init(I2C0_BASE, CPU_CLOCK);
+    wb_i2c_init(I2C1_BASE, CPU_CLOCK);
+    wb_i2c_init(I2C2_BASE, CPU_CLOCK);
+
+    //hold phy in reset
+    wb_poke32(SR_ADDR(SET0_BASE, SR_SW_RST), SW_RST_PHY);
+
+    printf("DEBUG: eth0 is %2dG\n",(wb_peek32(SR_ADDR(RB0_BASE, RB_ETH_TYPE0))==1) ? 10 : 1);
+    printf("DEBUG: eth1 is %2dG\n",(wb_peek32(SR_ADDR(RB0_BASE, RB_ETH_TYPE1))==1) ? 10 : 1);
+
+    //setup net stack and eth state machines
+    init_network();
+
+    //phy reset release
+    wb_poke32(SR_ADDR(SET0_BASE, SR_SW_RST), 0);
+
+    // For eth interfaces, initialize the PHY's
+    mdelay(100);
+    xge_ethernet_init(0);
+    xge_ethernet_init(1);
+
+    //print network summary
+    for (uint8_t e = 0; e < ethernet_ninterfaces(); e++)
+    {
+        printf("  MAC%u:     %s\n", (int)e, mac_addr_to_str(u3_net_stack_get_mac_addr(e)));
+        printf("    IP%u:      %s\n", (int)e, ip_addr_to_str(u3_net_stack_get_ip_addr(e)));
+        printf("    SUBNET%u:  %s\n", (int)e, ip_addr_to_str(u3_net_stack_get_subnet(e)));
+        printf("    BCAST%u:   %s\n", (int)e, ip_addr_to_str(u3_net_stack_get_bcast(e)));
+    }
+}
diff --git a/firmware/x300/x300/x300_init.h b/firmware/x300/x300/x300_init.h
new file mode 100644
index 000000000..324033779
--- /dev/null
+++ b/firmware/x300/x300/x300_init.h
@@ -0,0 +1,18 @@
+
+// Copyright 2012 Ettus Research LLC
+
+#ifndef INCLUDED_B250_INIT_H
+#define INCLUDED_B250_INIT_H
+
+void x300_init(void);
+
+void x300_serial_loader_run1(void);
+
+typedef enum
+  {
+    DCO_156p25,
+    DCO_125,
+    DCO_10
+  } dco_freq_t;
+
+#endif /* INCLUDED_B250_INIT_H */
diff --git a/firmware/x300/x300/x300_main.c b/firmware/x300/x300/x300_main.c
new file mode 100644
index 000000000..a15afd196
--- /dev/null
+++ b/firmware/x300/x300/x300_main.c
@@ -0,0 +1,463 @@
+// Copyright 2013 Ettus Research LLC
+
+#include "x300_init.h"
+#include "x300_defs.h"
+#include "x300_fw_common.h"
+#include "xge_phy.h"
+#include "ethernet.h"
+#include "chinch.h"
+#include "mdelay.h"
+
+#include <wb_utils.h>
+#include <wb_uart.h>
+#include <udp_uart.h>
+#include <u3_net_stack.h>
+#include <link_state_route_proto.h>
+#include <printf.h>
+#include <string.h>
+#include <print_addrs.h>
+
+static uint32_t *shmem = (uint32_t *) X300_FW_SHMEM_BASE;
+
+/***********************************************************************
+ * Setup call for udp framer
+ **********************************************************************/
+void program_udp_framer(
+    const uint8_t ethno,
+    const uint32_t sid,
+    const struct ip_addr *dst_ip,
+    const uint16_t dst_port,
+    const uint16_t src_port
+)
+{
+    const eth_mac_addr_t *dst_mac = u3_net_stack_arp_cache_lookup(dst_ip);
+    const size_t ethbase = (ethno == 0)? SR_ETHINT0 : SR_ETHINT1;
+    const size_t vdest = (sid >> 16) & 0xff;
+    printf("handle_udp_prog_framer sid %u vdest %u\n", sid, vdest);
+
+    //setup source framer
+    const eth_mac_addr_t *src_mac = u3_net_stack_get_mac_addr(ethno);
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_SRC_MAC_HI),
+        (((uint32_t)src_mac->addr[0]) << 8) | (((uint32_t)src_mac->addr[1]) << 0));
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_SRC_MAC_LO),
+        (((uint32_t)src_mac->addr[2]) << 24) | (((uint32_t)src_mac->addr[3]) << 16) |
+        (((uint32_t)src_mac->addr[4]) << 8) | (((uint32_t)src_mac->addr[5]) << 0));
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_SRC_IP_ADDR), u3_net_stack_get_ip_addr(ethno)->addr);
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_SRC_UDP_PORT), src_port);
+
+    //setup destination framer
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_DST_RAM_ADDR), vdest);
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_DST_IP_ADDR), dst_ip->addr);
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_DST_UDP_MAC),
+        (((uint32_t)dst_port) << 16) |
+        (((uint32_t)dst_mac->addr[0]) << 8) | (((uint32_t)dst_mac->addr[1]) << 0));
+    wb_poke32(SR_ADDR(SET0_BASE, ethbase + ETH_FRAMER_DST_MAC_LO),
+        (((uint32_t)dst_mac->addr[2]) << 24) | (((uint32_t)dst_mac->addr[3]) << 16) |
+        (((uint32_t)dst_mac->addr[4]) << 8) | (((uint32_t)dst_mac->addr[5]) << 0));
+}
+
+/***********************************************************************
+ * Handler for UDP framer program packets
+ **********************************************************************/
+void handle_udp_prog_framer(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t src_port, const uint16_t dst_port,
+    const void *buff, const size_t num_bytes
+)
+{
+  if (buff == NULL) {
+    /* We got here from ICMP_DUR undeliverable packet */
+    /* Future space for hooks to tear down streaming radios etc */
+  }
+  else {
+    const uint32_t sid = ((const uint32_t *)buff)[1];
+    program_udp_framer(ethno, sid, src, src_port, dst_port);
+  }
+}
+
+/***********************************************************************
+ * Handler for peek and poke host packets
+ **********************************************************************/
+void handle_udp_fw_comms(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t src_port, const uint16_t dst_port,
+    const void *buff, const size_t num_bytes
+)
+{
+    if (buff == NULL) {
+     /* We got here from ICMP_DUR undeliverable packet */
+    /* Future space for hooks to tear down streaming radios etc */
+    } else {
+        const x300_fw_comms_t *request = (const x300_fw_comms_t *)buff;
+        x300_fw_comms_t reply; memcpy(&reply, buff, sizeof(reply));
+
+        //check for error and set error flag
+        if (num_bytes < sizeof(x300_fw_comms_t)) {
+           reply.flags |= X300_FW_COMMS_FLAGS_ERROR;
+        }
+        //otherwise, run the actions set by the flags
+        else {
+            if (request->flags & X300_FW_COMMS_FLAGS_PEEK32)
+            {
+                if (request->addr & 0x00100000) {
+                    chinch_peek32(request->addr & 0x000FFFFF, &reply.data);
+                } else {
+                    reply.data = wb_peek32(request->addr);
+                }
+            }
+            if (request->flags & X300_FW_COMMS_FLAGS_POKE32)
+            {
+                if (request->addr & 0x00100000) {
+                    chinch_poke32(request->addr & 0x000FFFFF, request->data);
+                } else {
+                    wb_poke32(request->addr, request->data);
+                }
+            }
+        }
+
+        //send a reply if ack requested
+        if (request->flags & X300_FW_COMMS_FLAGS_ACK) {
+            u3_net_stack_send_udp_pkt(ethno, src, dst_port, src_port, &reply, sizeof(reply));
+        }
+    }
+}
+
+/***********************************************************************
+ * Handler for FPGA programming packets
+ **********************************************************************/
+void handle_udp_fpga_prog(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t src_port, const uint16_t dst_port,
+    const void *buff, const size_t num_bytes
+)
+{
+    const x300_fpga_prog_t *request = (const x300_fpga_prog_t *)buff;
+    x300_fpga_prog_flags_t reply = {0};
+    bool status = true;
+
+    if (buff == NULL) {
+        return;
+    } else if (num_bytes < offsetof(x300_fpga_prog_t, data)) {
+        reply.flags |= X300_FPGA_PROG_FLAGS_ERROR;
+    } else {
+        if (request->flags & X300_FPGA_PROG_FLAGS_INIT) {
+            STATUS_MERGE(chinch_flash_init(), status);
+        } else if (request->flags & X300_FPGA_PROG_FLAGS_CLEANUP) {
+            chinch_flash_cleanup();
+        } else if (request->flags & X300_FPGA_PROG_CONFIGURE) {
+            //This is a self-destructive operation and will most likely not return an ack.
+            chinch_start_config();
+        } else if (request->flags & X300_FPGA_PROG_CONFIG_STATUS) {
+            if (chinch_get_config_status() != CHINCH_CONFIG_COMPLETED)
+                reply.flags |= X300_FPGA_PROG_FLAGS_ERROR;
+        } else {
+            STATUS_MERGE(chinch_flash_select_sector(request->sector), status);
+            if (request->flags & X300_FPGA_PROG_FLAGS_ERASE)
+                STATUS_CHAIN(chinch_flash_erase_sector(), status);
+
+            uint32_t num_buff_writes = (request->size / CHINCH_FLASH_MAX_BUF_WRITES) +
+                                       (request->size % CHINCH_FLASH_MAX_BUF_WRITES == 0 ? 0 : 1);
+            uint32_t data_idx = 0;
+            for (uint32_t buf_wr_i = 0; (buf_wr_i < num_buff_writes) && status; buf_wr_i++) {
+                uint32_t wr_len = (request->size - data_idx) >= CHINCH_FLASH_MAX_BUF_WRITES ?
+                    CHINCH_FLASH_MAX_BUF_WRITES : (request->size - data_idx);
+
+                STATUS_MERGE(chinch_flash_write_buf((request->index + data_idx)*2,
+                    (uint16_t*)request->data+data_idx, wr_len), status);
+                data_idx += wr_len;
+            }
+
+            if (request->flags & X300_FPGA_PROG_FLAGS_VERIFY) {
+                uint16_t data[request->size];
+                STATUS_MERGE(chinch_flash_read_buf(request->index*2, data, request->size), status);
+                for (uint32_t i = 0; i < request->size; i++) {
+                    status &= (data[i] == request->data[i]);
+                }
+            }
+        }
+    }
+    if (!status) reply.flags |= X300_FPGA_PROG_FLAGS_ERROR;
+
+    //send a reply if ack requested
+    if (request->flags & X300_FPGA_PROG_FLAGS_ACK)
+    {
+        u3_net_stack_send_udp_pkt(ethno, src, dst_port, src_port, &reply, sizeof(reply));
+    }
+}
+
+/***********************************************************************
+ * Handler for MTU detection
+ **********************************************************************/
+void handle_udp_mtu_detect(
+    const uint8_t ethno,
+    const struct ip_addr *src, const struct ip_addr *dst,
+    const uint16_t src_port, const uint16_t dst_port,
+    const void *buff, const size_t num_bytes
+)
+{
+    const x300_mtu_t *request = (const x300_mtu_t *) buff;
+    x300_mtu_t reply;
+
+    if (buff == NULL) {
+        return;
+    } else if (!(request->flags & X300_MTU_DETECT_ECHO_REQUEST)) {
+        printf("DEBUG: MTU detect got unknown request\n");
+        reply.flags |= X300_MTU_DETECT_ERROR;
+    }
+
+    reply.flags |= X300_MTU_DETECT_ECHO_REPLY;
+    reply.size = num_bytes;
+
+    u3_net_stack_send_udp_pkt(ethno, src, dst_port, src_port, &reply, request->size);
+}
+
+
+/***********************************************************************
+ * Deal with host claims and claim timeout
+ **********************************************************************/
+static void handle_claim(void)
+{
+    static uint32_t last_time = 0;
+    static size_t timeout = 0;
+
+    //time is 0 if the claim was forfeit
+    if (shmem[X300_FW_SHMEM_CLAIM_TIME] == 0)
+    {
+        shmem[X300_FW_SHMEM_CLAIM_STATUS] = 0;
+    }
+    //if the time changes, reset timeout
+    else if (last_time != shmem[X300_FW_SHMEM_CLAIM_TIME])
+    {
+        shmem[X300_FW_SHMEM_CLAIM_STATUS] = 1;
+        timeout = 0;
+    }
+    //otherwise increment for timeout
+    else timeout++;
+
+    //always stash the last seen time
+    last_time = shmem[X300_FW_SHMEM_CLAIM_TIME];
+
+    //the claim has timed out after 2 seconds
+    if (timeout > 2000) shmem[X300_FW_SHMEM_CLAIM_STATUS] = 0;
+}
+
+/***********************************************************************
+ * LED blinky logic and support utilities
+ **********************************************************************/
+static uint32_t get_xbar_total(const uint8_t port)
+{
+    #define get_xbar_stat(in_prt, out_prt) \
+        wb_peek32(RB0_BASE+256+(((in_prt)*8+(out_prt))*4))
+    uint32_t total = 0;
+    for (size_t i = 0; i < 8; i++)
+    {
+        total += get_xbar_stat(port, i);
+    }
+    for (size_t i = 0; i < 8; i++)
+    {
+        total += get_xbar_stat(i, port);
+    }
+    if (port < 2) //also netstack if applicable
+    {
+        total += u3_net_stack_get_stat_counts(port);
+    }
+    return total;
+}
+
+static size_t popcntll(uint64_t num)
+{
+    size_t total = 0;
+    for (size_t i = 0; i < sizeof(num)*8; i++)
+    {
+        total += (num >> i) & 0x1;
+    }
+    return total;
+}
+
+static void update_leds(void)
+{
+    //update activity status for all ports
+    uint64_t activity_shreg[8];
+    for (size_t i = 0; i < 8; i++)
+    {
+        static uint32_t last_total[8];
+        const uint32_t total = get_xbar_total(i);
+        activity_shreg[i] <<= 1;
+        activity_shreg[i] |= (total == last_total[i])? 0 : 1;
+        last_total[i] = total;
+    }
+
+    static uint32_t counter = 0;
+    counter++;
+
+    const size_t cnt0 = popcntll(activity_shreg[0]);
+    const size_t cnt1 = popcntll(activity_shreg[1]);
+    const bool act0 = cnt0*8 > (counter % 64);
+    const bool act1 = cnt1*8 > (counter % 64);
+    const bool link0 = ethernet_get_link_up(0);
+    const bool link1 = ethernet_get_link_up(1);
+    const bool claimed = shmem[X300_FW_SHMEM_CLAIM_STATUS];
+
+    wb_poke32(SET0_BASE + SR_LEDS*4, 0
+        | (link0? LED_LINK2 : 0)
+        | (link1? LED_LINK1 : 0)
+        | (act0? LED_ACT2 : 0)
+        | (act1? LED_ACT1 : 0)
+        | ((act0 || act1)? LED_LINKACT : 0)
+        | (claimed? LED_LINKSTAT : 0)
+    );
+}
+
+/***********************************************************************
+ * Send periodic GARPs to keep network hardware informed
+ **********************************************************************/
+static void garp(void)
+{
+    static size_t count = 0;
+    if (count++ < 60000) return; //60 seconds
+    count = 0;
+    for (size_t e = 0; e < ethernet_ninterfaces(); e++)
+    {
+        if (!ethernet_get_link_up(e)) continue;
+        u3_net_stack_send_arp_request(e, u3_net_stack_get_ip_addr(e));
+    }
+}
+
+/***********************************************************************
+ * UART handlers - interacts between UART and SHMEM
+ **********************************************************************/
+static void handle_uarts(void)
+{
+    //pool allocations - always update shmem with location
+    #define NUM_POOL_WORDS32 64
+    static uint32_t rxpool[NUM_POOL_WORDS32];
+    static uint32_t txpool[NUM_POOL_WORDS32];
+    shmem[X300_FW_SHMEM_UART_RX_ADDR] = (uint32_t)rxpool;
+    shmem[X300_FW_SHMEM_UART_TX_ADDR] = (uint32_t)txpool;
+    shmem[X300_FW_SHMEM_UART_WORDS32] = NUM_POOL_WORDS32;
+
+    ////////////////////////////////////////////////////////////////////
+    // RX UART - try to get a character and post it to the shmem buffer
+    ////////////////////////////////////////////////////////////////////
+    static uint32_t rxoffset = 0;
+    const int rxch = wb_uart_getc(UART0_BASE);
+    if (rxch != -1)
+    {
+        rxoffset = (rxoffset+1) % (NUM_POOL_WORDS32*4);
+        const int shift = ((rxoffset%4) * 8);
+        static uint32_t rxword32 = 0;
+        if (shift == 0) rxword32 = 0;
+        rxword32 |= ((uint32_t) rxch) << ((rxoffset%4) * 8);
+        rxpool[rxoffset/4] = rxword32;
+        shmem[X300_FW_SHMEM_UART_RX_INDEX] = rxoffset;
+    }
+
+    ////////////////////////////////////////////////////////////////////
+    // TX UART - check for a character in the shmem buffer and send it
+    ////////////////////////////////////////////////////////////////////
+    static uint32_t txoffset = 0;
+    if (txoffset != shmem[X300_FW_SHMEM_UART_TX_INDEX])
+    {
+        const int shift = ((txoffset%4) * 8);
+        const int txch = txpool[txoffset/4] >> shift;
+        wb_uart_putc(UART0_BASE, txch);
+        txoffset = (txoffset+1) % (NUM_POOL_WORDS32*4);
+    }
+}
+
+/***********************************************************************
+ * update the link state periodic update
+ **********************************************************************/
+static void update_forwarding(const uint8_t e)
+{
+    //update forwarding rules
+    uint32_t forward = 0;
+    if (!link_state_route_proto_causes_cycle_cached(e, (e+1)%2))
+    {
+        forward |= (1 << 0); //forward bcast
+        forward |= (1 << 1); //forward not mac dest
+    }
+    const uint32_t eth_base = (e == 0)? SR_ETHINT0 : SR_ETHINT1;
+    wb_poke32(SR_ADDR(SET0_BASE, eth_base + 8 + 4), forward);
+}
+
+static void handle_link_state(void)
+{
+    //update shmem entries to keep it persistent
+    size_t map_len = 0;
+    shmem[X300_FW_SHMEM_ROUTE_MAP_ADDR] = (uint32_t)link_state_route_get_node_mapping(&map_len);
+    shmem[X300_FW_SHMEM_ROUTE_MAP_LEN] = map_len;
+
+    //update forwarding for all eths
+    //low overhead: this does not run the algorithm
+    for (uint8_t e = 0; e < ethernet_ninterfaces(); e++) update_forwarding(e);
+
+    static size_t count = 0;
+    if (count++ < 2000) return; //2 seconds
+    count = 0;
+
+    link_state_route_proto_tick();
+    for (size_t e = 0; e < ethernet_ninterfaces(); e++)
+    {
+        if (ethernet_get_link_up(e))
+        {
+            link_state_route_proto_update(e);
+            link_state_route_proto_flood(e);
+        }
+        link_state_route_proto_update_cycle_cache(e);
+        /*
+        printf("is there a cycle %s -> %s? %s\n",
+            ip_addr_to_str(u3_net_stack_get_ip_addr(e)),
+            ip_addr_to_str(u3_net_stack_get_ip_addr((e+1)%2)),
+            link_state_route_proto_causes_cycle_cached(e, (e+1)%2)? "YES" : "no");
+        //*/
+    }
+}
+
+/***********************************************************************
+ * Main loop runs all the handlers
+ **********************************************************************/
+int main(void)
+{
+    x300_init();
+    u3_net_stack_register_udp_handler(X300_FW_COMMS_UDP_PORT, &handle_udp_fw_comms);
+    u3_net_stack_register_udp_handler(X300_VITA_UDP_PORT, &handle_udp_prog_framer);
+    u3_net_stack_register_udp_handler(X300_FPGA_PROG_UDP_PORT, &handle_udp_fpga_prog);
+    u3_net_stack_register_udp_handler(X300_MTU_DETECT_UDP_PORT, &handle_udp_mtu_detect);
+
+    uint32_t last_cronjob = 0;
+
+    while(true)
+    {
+        //jobs that happen once every ms
+        const uint32_t ticks_now = wb_peek32(SR_ADDR(RB0_BASE, RB_COUNTER));
+        const uint32_t ticks_passed = ticks_now - last_cronjob;
+        static const uint32_t tick_delta = CPU_CLOCK/1000;
+        if (ticks_passed > tick_delta)
+        {
+            handle_link_state(); //deal with router table update
+            handle_claim(); //deal with the host claim register
+            update_leds(); //run the link and activity leds
+            garp(); //send periodic garps
+            xge_poll_sfpp_status(0); // Every so often poll XGE Phy to look for SFP+ hotplug events.
+            xge_poll_sfpp_status(1); // Every so often poll XGE Phy to look for SFP+ hotplug events.
+            last_cronjob = wb_peek32(SR_ADDR(RB0_BASE, RB_COUNTER));
+        }
+
+        //run the network stack - poll and handle
+        u3_net_stack_handle_one();
+
+        //run the PCIe listener - poll and fwd to wishbone
+        forward_pcie_user_xact_to_wb();
+
+        //run the udp uart handler for incoming serial data
+        handle_uarts(); //udp_uart_poll();
+
+        //always reload the compat number into the shmem to keep it persistent
+        shmem[X300_FW_SHMEM_COMPAT_NUM] = (X300_FW_COMPAT_MAJOR << 16) | X300_FW_COMPAT_MINOR;
+    }
+    return 0;
+}
diff --git a/firmware/x300/x300_debug.py b/firmware/x300/x300_debug.py
new file mode 100755
index 000000000..c9bcbb138
--- /dev/null
+++ b/firmware/x300/x300_debug.py
@@ -0,0 +1,167 @@
+#!/usr/bin/env python
+#
+# Copyright 2010-2011 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import optparse
+import math
+import socket
+import struct
+
+
+########################################################################
+# constants
+########################################################################
+B250_FW_COMMS_UDP_PORT = 49152
+
+B250_FW_COMMS_FLAGS_ACK = 1
+B250_FW_COMMS_FLAGS_ERROR = 2
+B250_FW_COMMS_FLAGS_POKE32 = 4
+B250_FW_COMMS_FLAGS_PEEK32 = 8
+
+#UDP_CTRL_PORT = 49183
+UDP_MAX_XFER_BYTES = 1024
+UDP_TIMEOUT = 3
+#USRP2_FW_PROTO_VERSION = 11 #should be unused after r6
+
+#REG_ARGS_FMT = '!LLLLLB15x'
+#REG_IP_FMT = '!LLLL20x'
+REG_PEEK_POKE_FMT = '!LLLL'
+
+
+_seq = -1
+def seq():
+    global _seq
+    _seq = _seq+1
+    return _seq
+
+
+########################################################################
+# helper functions
+########################################################################
+
+def unpack_reg_peek_poke_fmt(s):
+    return struct.unpack(REG_PEEK_POKE_FMT,s) #(flags, seq, addr, data)
+
+def pack_reg_peek_poke_fmt(flags, seq, addr, data):
+    return struct.pack(REG_PEEK_POKE_FMT, flags, seq, addr, data);
+
+########################################################################
+# Burner class, holds a socket and send/recv routines
+########################################################################
+class ctrl_socket(object):
+    def __init__(self, addr):
+        self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self._sock.settimeout(UDP_TIMEOUT)
+        self._sock.connect((addr, B250_FW_COMMS_UDP_PORT))
+        self.set_callbacks(lambda *a: None, lambda *a: None)
+        #self.init_update() #check that the device is there
+
+    def set_callbacks(self, progress_cb, status_cb):
+        self._progress_cb = progress_cb
+        self._status_cb = status_cb
+
+    def send_and_recv(self, pkt):
+        self._sock.send(pkt)
+        return self._sock.recv(UDP_MAX_XFER_BYTES)
+
+    def read_router_stats(self):
+        print
+        print("            "),
+        ports = ['        eth0','        eth1','      radio0','      radio1','    compute0','    compute1','    compute2','        pcie']
+        for in_prt in ports:
+            print("%s" % in_prt),
+        print("   Egress Port")
+        print("             "),
+        for in_prt in range (0, 8):
+            print("____________"),
+        print
+        for in_prt in range (0, 8):
+            print("%s |" % ports[in_prt]),
+            for out_prt in range (0, 8):
+                out_pkt = pack_reg_peek_poke_fmt(B250_FW_COMMS_FLAGS_PEEK32|B250_FW_COMMS_FLAGS_ACK, seq(), 0xA000+256+((in_prt*8+out_prt)*4), 0)
+                in_pkt = self.send_and_recv(out_pkt)
+                (flags, rxseq, addr, data) = unpack_reg_peek_poke_fmt(in_pkt)
+                if flags & B250_FW_COMMS_FLAGS_ERROR == B250_FW_COMMS_FLAGS_ERROR:
+                    raise Exception("B250 peek returns error code")
+                print("%10d  " % (data)),
+            print
+        print
+        print("Ingress Port")
+        print
+
+
+    def peek(self,peek_addr):
+        out_pkt = pack_reg_peek_poke_fmt(B250_FW_COMMS_FLAGS_PEEK32|B250_FW_COMMS_FLAGS_ACK, seq(), peek_addr, 0)
+        in_pkt = self.send_and_recv(out_pkt)
+        (flags, rxseq, addr, data) = unpack_reg_peek_poke_fmt(in_pkt)
+        if flags & B250_FW_COMMS_FLAGS_ERROR == B250_FW_COMMS_FLAGS_ERROR:
+            raise Exception("B250 peek of address %d returns error code" % (addr))
+        print("PEEK of address %d(0x%x) reads %d(0x%x)" % (addr,addr,data,data))
+
+    def poke(self,poke_addr,poke_data):
+        out_pkt = pack_reg_peek_poke_fmt(B250_FW_COMMS_FLAGS_POKE32|B250_FW_COMMS_FLAGS_ACK, seq(), poke_addr, poke_data)
+        in_pkt = self.send_and_recv(out_pkt)
+        (flags, rxseq, addr, data) = unpack_reg_peek_poke_fmt(in_pkt)
+        if flags & B250_FW_COMMS_FLAGS_ERROR == B250_FW_COMMS_FLAGS_ERROR:
+            raise Exception("B250 peek of address %d returns error code" % (addr))
+        print("POKE of address %d(0x%x) with %d(0x%x)" % (poke_addr,poke_addr,poke_data,poke_data)  )
+
+
+########################################################################
+# command line options
+########################################################################
+def get_options():
+    parser = optparse.OptionParser()
+    parser.add_option("--addr", type="string",                 help="USRP-N2XX device address",       default='')
+    parser.add_option("--list", action="store_true",           help="list possible network devices", default=False)
+    parser.add_option("--peek", type="int",                 help="Read from memory map",     default=None)
+    parser.add_option("--poke", type="int",                 help="Write to memory map",     default=None)
+    parser.add_option("--data", type="int",                 help="Data for poke",     default=None)
+    parser.add_option("--stats", action="store_true",           help="Display SuperMIMO Network Stats", default=False)
+    (options, args) = parser.parse_args()
+
+    return options
+
+
+########################################################################
+# main
+########################################################################
+if __name__=='__main__':
+    options = get_options()
+
+
+    if options.list:
+        print('Possible network devices:')
+        print('  ' + '\n  '.join(enumerate_devices()))
+        exit()
+
+    if not options.addr: raise Exception('no address specified')
+
+    status = ctrl_socket(addr=options.addr)
+
+    if options.stats:
+        status.read_router_stats()
+
+
+    if options.peek is not None:
+        addr = options.peek
+        status.peek(addr)
+
+    if options.poke is not None and options.data is not None:
+        addr = options.poke
+        data = options.data
+        status.poke(addr,data)
diff --git a/firmware/x300/x300_fpga_downloader.py b/firmware/x300/x300_fpga_downloader.py
new file mode 100755
index 000000000..5529afcb7
--- /dev/null
+++ b/firmware/x300/x300_fpga_downloader.py
@@ -0,0 +1,179 @@
+#!/usr/bin/env python
+#
+# Copyright 2010-2011 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import optparse
+import math
+import socket
+import struct
+import time
+import sys
+
+########################################################################
+# constants
+########################################################################
+B250_FPGA_IMAGE_SIZE_BYTES  = 15877916
+B250_FPGA_PROG_UDP_PORT     = 49157
+
+B250_FPGA_PROG_FLAGS_ACK     = 1
+B250_FPGA_PROG_FLAGS_ERROR   = 2
+B250_FPGA_PROG_FLAGS_INIT    = 4
+B250_FPGA_PROG_FLAGS_CLEANUP = 8
+B250_FPGA_PROG_FLAGS_ERASE   = 16
+B250_FPGA_PROG_FLAGS_VERIFY  = 32
+B250_FPGA_PROG_CONFIGURE     = 64
+B250_FPGA_PROG_CONFIG_STATUS = 128
+
+B250_FLASH_SECTOR_SIZE      = 131072
+B250_PACKET_SIZE            = 256
+B250_FPGA_SECTOR_START      = 16
+
+B250_MAX_RESPONSE_BYTES     = 128
+UDP_TIMEOUT                 = 3
+FPGA_LOAD_TIMEOUT           = 15
+
+########################################################################
+# helper functions
+########################################################################
+def get_options():
+    parser = optparse.OptionParser()
+    parser.add_option("--addr", type="string",          help="USRP-B250 device address",            default='')
+    parser.add_option("--download", type="string",      help="Path to the FPGA image to download.", default=None)
+    parser.add_option("--posc", type="string",          help="Path to the POSC image to download.", default=None)
+    parser.add_option("--program", action="store_true", help="Program the FPGA from flash.",        default=False)
+    parser.add_option("--verify", action="store_true",  help="Verify data downloaded to flash.",    default=False)
+    (options, args) = parser.parse_args()
+    return options
+
+def draw_progress_bar(percent, bar_len = 28):
+    sys.stdout.write("\r")
+    progress = ""
+    for i in range(bar_len):
+        if i < int((bar_len * percent) / 100):
+            progress += "="
+        else:
+            progress += "-"
+    sys.stdout.write("[%s] %d%%" % (progress, percent))
+    sys.stdout.flush()
+
+def unpack_x300_fpga_flags_fmt(s):
+    return struct.unpack('!L', s)[0] #(flags)
+
+def pack_x300_fpga_prog_fmt(flags, sector, offset, size, data):
+    return struct.pack("!LLLL%dH" % (len(data),), flags, sector, offset, size, *data)
+
+def bit_reverse(byte):
+    b = ord(byte)
+    b = (b & 0xF0) >> 4 | (b & 0x0F) << 4
+    b = (b & 0xCC) >> 2 | (b & 0x33) << 2
+    b = (b & 0xAA) >> 1 | (b & 0x55) << 1
+    return chr(b)
+
+def chunkify(stuff, n):
+    return [stuff[i:i+n] for i in range(0, len(stuff), n)]
+
+########################################################################
+# Burner class, holds a socket and send/recv routines
+########################################################################
+class ctrl_socket(object):
+    def __init__(self, addr):
+        self._sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        self._sock.settimeout(UDP_TIMEOUT)
+        self._sock.connect((addr, B250_FPGA_PROG_UDP_PORT))
+        self.set_callbacks(lambda *a: None, lambda *a: None)
+
+    def set_callbacks(self, progress_cb, status_cb):
+        self._progress_cb = progress_cb
+        self._status_cb = status_cb
+
+    def send_without_ack(self, pkt):
+        self._sock.send(pkt)
+
+    def send_with_ack(self, out_pkt, message):
+        self.send_without_ack(out_pkt)
+        in_pkt = self._sock.recv(B250_MAX_RESPONSE_BYTES)
+        flags = unpack_x300_fpga_flags_fmt(in_pkt)
+        if flags & B250_FPGA_PROG_FLAGS_ERROR == B250_FPGA_PROG_FLAGS_ERROR:
+            raise Exception(message)
+
+    def download_fpga(self, image, verify):
+        print("Reading FPGA image file...")
+        fpga_file = open(image, 'rb')
+        print("Processing FPGA image...")
+        fpga_image = ''.join([ bit_reverse(b) for b in fpga_file.read() ])
+        
+        print("Writing FPGA image to flash...")
+        out_pkt = pack_x300_fpga_prog_fmt(B250_FPGA_PROG_FLAGS_ACK|B250_FPGA_PROG_FLAGS_INIT,
+                                          0, 0, 0, [0]*(B250_PACKET_SIZE/2))
+        self.send_with_ack(out_pkt, "Flash initialization failed!!!")
+
+        sector_chunks = chunkify(fpga_image, B250_FLASH_SECTOR_SIZE)
+        for sector_idx in range(len(sector_chunks)):
+            packet_chunks = chunkify(sector_chunks[sector_idx], B250_PACKET_SIZE)
+            offset = 0
+            for packet_data in packet_chunks:
+                data = struct.unpack("%dH" % (len(packet_data) / 2), packet_data)
+                flags = B250_FPGA_PROG_FLAGS_ACK
+                if offset == 0: flags |= B250_FPGA_PROG_FLAGS_ERASE
+                if verify: flags |= B250_FPGA_PROG_FLAGS_VERIFY
+                out_pkt = pack_x300_fpga_prog_fmt(flags, B250_FPGA_SECTOR_START+sector_idx, offset, len(data), data)
+                self.send_with_ack(out_pkt, "Transfer failed or data verification failed!!!")
+                offset += len(data)
+            draw_progress_bar(((sector_idx+1)*100)/len(sector_chunks))
+
+        print(' ')
+        out_pkt = pack_x300_fpga_prog_fmt(B250_FPGA_PROG_FLAGS_ACK|B250_FPGA_PROG_FLAGS_CLEANUP,
+                                          0, 0, 0, [0]*(B250_PACKET_SIZE/2))
+        self.send_with_ack(out_pkt, "Flash cleanup failed!!!")
+
+    def program(self):
+        print("Programming FPGA from flash...")
+        out_pkt = pack_x300_fpga_prog_fmt(B250_FPGA_PROG_CONFIGURE, 0, 0, 0, [0]*(B250_PACKET_SIZE/2))
+        self.send_without_ack(out_pkt)
+        print("Waiting for FPGA to load...")
+        self._sock.settimeout(1)
+        out_pkt = pack_x300_fpga_prog_fmt(B250_FPGA_PROG_FLAGS_ACK|B250_FPGA_PROG_CONFIG_STATUS, 0, 0, 0, [0]*(B250_PACKET_SIZE/2))
+        for i in range(FPGA_LOAD_TIMEOUT):
+            try:
+                self.send_without_ack(out_pkt)
+                in_pkt = self._sock.recv(B250_MAX_RESPONSE_BYTES)
+                flags = unpack_x300_fpga_flags_fmt(in_pkt)
+                if not(flags & B250_FPGA_PROG_FLAGS_ERROR == B250_FPGA_PROG_FLAGS_ERROR):
+                    break
+            except socket.error:
+                pass
+
+
+########################################################################
+# main
+########################################################################
+if __name__=='__main__':
+    options = get_options()
+
+    if not options.addr: 
+        raise Exception('No address specified')
+
+    status = ctrl_socket(addr=options.addr)
+
+    start_time = time.time()
+    if options.download is not None:
+        status.download_fpga(options.download, options.verify)
+
+    if options.program:
+        status.program()
+
+    print("(Elapsed time: %.1fs)" % (time.time() - start_time))
diff --git a/host/CMakeLists.txt b/host/CMakeLists.txt
index ded4bb54c..cd4d87ce5 100644
--- a/host/CMakeLists.txt
+++ b/host/CMakeLists.txt
@@ -137,6 +137,7 @@ SET(BOOST_REQUIRED_COMPONENTS
     system
     thread
     unit_test_framework
+    serialization
 )
 
 IF(UNIX AND NOT BOOST_ROOT AND EXISTS "/usr/lib64")
@@ -213,8 +214,8 @@ UHD_INSTALL(FILES
 # Images download directory for utils/uhd_images_downloader.py
 ########################################################################
 
-SET(UHD_IMAGES_MD5SUM "0bab468817baa28024c4bf966d923b31")
-SET(UHD_IMAGES_DOWNLOAD_SRC "http://files.ettus.com/binaries/maint_images/archive/uhd-images_003.006.002-release.zip")
+SET(UHD_IMAGES_MD5SUM "cf0d5744a4cfe289554309159d1d5259")
+SET(UHD_IMAGES_DOWNLOAD_SRC "http://files.ettus.com/binaries/maint_images/archive/uhd-images_003.007.000-release.zip")
 
 ########################################################################
 # Register top level components
diff --git a/host/cmake/Modules/FindUDev.cmake b/host/cmake/Modules/FindUDev.cmake
new file mode 100644
index 000000000..4c8390db6
--- /dev/null
+++ b/host/cmake/Modules/FindUDev.cmake
@@ -0,0 +1,19 @@
+# - Try to find UDev
+# Once done this will define
+#
+#  UDEV_FOUND - system has UDev
+#  UDEV_INCLUDE_DIR - the libudev include directory
+#  UDEV_LIBS - The libudev libraries
+
+# Copyright (c) 2010, Rafael Fernández López, <ereslibre@kde.org>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+find_path(UDEV_INCLUDE_DIR libudev.h)
+find_library(UDEV_LIBS udev)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(UDev DEFAULT_MSG UDEV_INCLUDE_DIR UDEV_LIBS)
+
+mark_as_advanced(UDEV_INCLUDE_DIR UDEV_LIBS)
diff --git a/host/cmake/Modules/UHDVersion.cmake b/host/cmake/Modules/UHDVersion.cmake
index b0d04fe70..41c3ac20b 100644
--- a/host/cmake/Modules/UHDVersion.cmake
+++ b/host/cmake/Modules/UHDVersion.cmake
@@ -1,5 +1,5 @@
 #
-# Copyright 2010-2013 Ettus Research LLC
+# Copyright 2010-2014 Ettus Research LLC
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -26,8 +26,8 @@ FIND_PACKAGE(Git QUIET)
 #  - increment patch on for bug fixes and docs
 ########################################################################
 SET(UHD_VERSION_MAJOR 003)
-SET(UHD_VERSION_MINOR 006)
-SET(UHD_VERSION_PATCH 002)
+SET(UHD_VERSION_MINOR 007)
+SET(UHD_VERSION_PATCH 000)
 
 ########################################################################
 # Set up trimmed version numbers for DLL resource files and packages
diff --git a/host/docs/CMakeLists.txt b/host/docs/CMakeLists.txt
index fa6e98918..0163a5c20 100644
--- a/host/docs/CMakeLists.txt
+++ b/host/docs/CMakeLists.txt
@@ -25,8 +25,10 @@ SET(manual_sources
     calibration.rst
     coding.rst
     dboards.rst
+    gpio_api.rst
     gpsdo.rst
     gpsdo_b2x0.rst
+    gpsdo_x3x0.rst
     general.rst
     images.rst
     stream.rst
@@ -37,6 +39,7 @@ SET(manual_sources
     usrp_b100.rst
     usrp_b200.rst
     usrp_e1x0.rst
+    usrp_x3x0.rst
 )
 
 ########################################################################
@@ -81,6 +84,14 @@ IF(ENABLE_MANUAL)
     #make the html manual a build-time dependency
     ADD_CUSTOM_TARGET(manual_html ALL DEPENDS ${manual_html_files})
     UHD_INSTALL(FILES ${manual_sources} DESTINATION ${PKG_DOC_DIR}/manual/rst COMPONENT manual)
+
+    #resources for html manual 
+    ADD_CUSTOM_COMMAND(
+        TARGET manual_html POST_BUILD
+        COMMAND ${CMAKE_COMMAND} -E copy_directory ${CMAKE_CURRENT_SOURCE_DIR}/res ${CMAKE_CURRENT_BINARY_DIR}/res
+    )
+    UHD_INSTALL(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/res DESTINATION ${PKG_DOC_DIR}/manual/html COMPONENT manual)
+
 ENDIF(ENABLE_MANUAL)
 
 ########################################################################
@@ -128,6 +139,7 @@ SET(man_page_sources
     uhd_images_downloader.1
     uhd_usrp_probe.1
     usrp_n2xx_simple_net_burner.1
+    usrp_x3xx_fpga_burner.1
     usrp2_card_burner.1
 )
 
@@ -137,7 +149,12 @@ SET(man_page_sources
 MESSAGE(STATUS "")
 FIND_PACKAGE(GZip)
 
-LIBUHD_REGISTER_COMPONENT("Man Pages" ENABLE_MAN_PAGES ON "GZIP_FOUND;LINUX" OFF)
+# No elegant way in CMake to reverse a boolean
+IF(NOT WIN32)
+    SET(NOT_WIN32 TRUE)
+ENDIF(NOT WIN32)
+
+LIBUHD_REGISTER_COMPONENT("Man Pages" ENABLE_MAN_PAGES ON "GZIP_FOUND;NOT_WIN32" OFF)
 
 IF(ENABLE_MAN_PAGES)
     #Generate man pages
diff --git a/host/docs/calibration.rst b/host/docs/calibration.rst
index 8ba3477b8..23bef01b7 100644
--- a/host/docs/calibration.rst
+++ b/host/docs/calibration.rst
@@ -5,14 +5,15 @@ UHD - Calibration Application Notes
 .. contents:: Table of Contents
 
 ------------------------------------------------------------------------
-Self-calibration
+Self-Calibration
 ------------------------------------------------------------------------
-UHD software comes with several self-calibration utilities for minimizing IQ imbalance and DC offset.
-These utilities perform calibration sweeps using transmit leakage into the receive path
-(special equipment is not required).
-The results from a calibration are written to a CSV file in the user's home directory.
-UHD software will automatically apply corrections at runtime when the user re-tunes the daughterboard LO.
-Calibration results are specific to an individual RF board.
+UHD software comes with several self-calibration utilities for minimizing IQ
+imbalance and DC offset.  These utilities perform calibration sweeps using
+transmit leakage into the receive path (special equipment is not required).
+The results from a calibration are written to a CSV file in the user's home
+directory.  UHD software will automatically apply corrections at runtime when
+the user re-tunes the daughterboard LO.  Calibration results are specific to an
+individual RF board.
 
 **Note:**
 When a calibration table is present,
@@ -27,10 +28,10 @@ UHD software comes with the following calibration utilities:
 
 The following RF frontends are supported by the self-calibration utilities:
 
- * RFX transceiver board
- * WBX transceiver board
- * SBX transceiver board
- * CBX transceiver board
+ * RFX Series transceiver boards
+ * WBX Series transceiver boards
+ * SBX Series transceiver boards
+ * CBX Series transceiver boards
 
 ********************************************
 Calibration Utilities
@@ -54,7 +55,7 @@ may not have a serial number. If this is the case, run the following command to
 into the daughterboard's EEPROM:
 ::
 
-    <install dir>/share/uhd/utils/usrp_burn_db_eeprom --ser=<desired serial> --args=<optional device args>
+    <install dir>/lib/uhd/utils/usrp_burn_db_eeprom --ser=<desired serial> --args=<optional device args>
 
 ********************************************
 Calibration Data
diff --git a/host/docs/dboards.rst b/host/docs/dboards.rst
index 4b5a074a8..d6cbc6151 100644
--- a/host/docs/dboards.rst
+++ b/host/docs/dboards.rst
@@ -26,15 +26,15 @@ The boards have no tunable elements or programmable gains.
 Through the magic of aliasing, you can down-convert signals
 greater than the Nyquist rate of the ADC.
 
-BasicRX Bandwidth (Hz): 
+BasicRX Bandwidth:
 
-* **For Real-Mode (A or B frontend)**: 250M
-* **For Complex (AB or BA frontend)**: 500M
+* **For Real-Mode (A or B frontend)**: 250 MHz
+* **For Complex (AB or BA frontend)**: 500 MHz
 
-LFRX Bandwidth (Hz):
+LFRX Bandwidth:
 
-* **For Real-Mode (A or B frontend)**: 33M
-* **For Complex (AB or BA frontend)**: 66M
+* **For Real-Mode (A or B frontend)**: 33 MHz
+* **For Complex (AB or BA frontend)**: 66 MHz
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Basic TX and LFTX
@@ -50,15 +50,15 @@ The boards have no tunable elements or programmable gains.
 Through the magic of aliasing, you can up-convert signals
 greater than the Nyquist rate of the DAC.
 
-BasicTX Bandwidth (Hz): 250M
+BasicTX Bandwidth (Hz):
 
-* **For Real-Mode (A or B frontend**): 250M
-* **For Complex (AB or BA frontend)**: 500M
+* **For Real-Mode (A or B frontend**): 250 MHz
+* **For Complex (AB or BA frontend)**: 500 MHz
 
-LFTX Bandwidth (Hz): 33M
+LFTX Bandwidth (Hz):
 
-* **For Real-Mode (A or B frontend)**: 33M
-* **For Complex (AB or BA frontend)**: 66M
+* **For Real-Mode (A or B frontend)**: 33 MHz
+* **For Complex (AB or BA frontend)**: 66 MHz
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 DBSRX
@@ -77,7 +77,7 @@ Receive Gains:
 * **GC1**, Range: 0-56dB
 * **GC2**, Range: 0-24dB
 
-Bandwidth (Hz): 8M-66M
+Bandwidth: 8 MHz - 66 MHz
 
 Sensors:
 
@@ -100,7 +100,7 @@ Receive Gains:
 * **GC1**, Range: 0-73dB
 * **BBG**, Range: 0-15dB
 
-Bandwidth (Hz): 8M-80M
+Bandwidth (Hz): 8 MHz -80 MHz
 
 Sensors:
 
@@ -128,10 +128,10 @@ the receive antenna will always be set to RX2, regardless of the settings.
 
 Receive Gains: **PGA0**, Range: 0-70dB (except RFX400 range is 0-45dB)
 
-Bandwidths (Hz):
+Bandwidth:
 
-* **RX**: 40M
-* **TX**: 40M
+* **RX**: 40 MHz
+* **TX**: 40 MHz
 
 Sensors:
 
@@ -142,10 +142,10 @@ XCVR 2450
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 The XCVR2450 has 2 quadrature frontends, one transmit, one receive.
 Transmit and Receive default to direct conversion but
-can be used in low IF mode through lo_offset in uhd::tune_request_t
+can be used in low IF mode through lo_offset in uhd::tune_request_t.
 
 The XCVR2450 has a non-contiguous tuning range consisting of a 
-high band (4.9-6.0GHz) and a low band (2.4-2.5GHz).
+high band (4.9-6.0 GHz) and a low band (2.4-2.5 GHz).
 
 Transmit Antennas: **J1** or **J2**
 
@@ -170,10 +170,10 @@ Receive Gains:
 * **LNA**, Range: 0-30.5dB
 * **VGA**, Range: 0-62dB
 
-Bandwidths (Hz):
+Bandwidths:
 
-* **RX**: 15M, 19M, 28M, 36M; (each +-0, 5, or 10%)
-* **TX**: 24M, 36M, 48M
+* **RX**: 15 MHz, 19 MHz, 28 MHz, 36 MHz; (each +-0, 5, or 10%)
+* **TX**: 24 MHz, 36 MHz, 48 MHz
 
 Sensors:
 
@@ -183,12 +183,18 @@ Sensors:
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 WBX Series
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-The WBX Series boards have 2 quadrature frontends, one transmit, one receive.
-Transmit and Receive default to direct conversion but
-can be used in low IF mode through lo_offset in **uhd::tune_request_t**.
 
-The WBX Series boards have independent receive and transmit LO's and synthesizers 
-allowing full-duplex operation on different transmit and receive frequencies.
+Features:
+
+* 2 quadrature frontends (1 transmit, 1 receive)
+
+  * Defaults to direct conversion
+  * Can be used in low IF mode through lo_offset with **uhd::tune_request_t**
+
+* Independent recieve and transmit LO's and synthesizers
+
+  * Allows for full-duplex operation on different transmit and receive frequencies
+  * Can be set to use Integer-N tuning for better spur performance with **uhd::tune_request_t**
 
 Transmit Antennas: **TX/RX**
 
@@ -196,18 +202,16 @@ Receive Antennas: **TX/RX** or **RX2**
 
 * **Frontend 0:** Complex baseband signal for selected antenna
 
-The user may set the receive antenna to be TX/RX or RX2.
-However, when using an WBX board in full-duplex mode,
-the receive antenna will always be set to RX2, regardless of the settings.
+* **Note:** The user may set the receive antenna to be TX/RX or RX2. However, when using a WBX board in full-duplex mode, the receive antenna will always be set to RX2, regardless of the settings.
 
 Transmit Gains: **PGA0**, Range: 0-25dB
 
 Receive Gains: **PGA0**, Range: 0-31.5dB
 
-Bandwidths (Hz):
+Bandwidths:
 
-* **RX**: 40M
-* **TX**: 40M
+* **WBX**: 40 MHz, RX & TX
+* **WBX-120**: 120 MHz, RX & TX
 
 Sensors:
 
@@ -216,12 +220,18 @@ Sensors:
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 SBX Series
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-The SBX Series boards have 2 quadrature frontends, one transmit, one receive.
-Transmit and Receive default to direct conversion but
-can be used in low IF mode through lo_offset in **uhd::tune_request_t**.
 
-The SBX Series boards have independent receive and transmit LO's and synthesizers 
-allowing full-duplex operation on different transmit and receive frequencies.
+Features:
+
+* 2 quadrature frontends (1 transmit, 1 receive)
+
+  * Defaults to direct conversion
+  * Can be used in low IF mode through lo_offset with **uhd::tune_request_t**
+
+* Independent recieve and transmit LO's and synthesizers
+
+  * Allows for full-duplex operation on different transmit and receive frequencies
+  * Can be set to use Integer-N tuning for better spur performance with **uhd::tune_request_t**
 
 Transmit Antennas: **TX/RX**
 
@@ -229,18 +239,16 @@ Receive Antennas: **TX/RX** or **RX2**
 
 * **Frontend 0:** Complex baseband signal for selected antenna
 
-The user may set the receive antenna to be TX/RX or RX2.
-However, when using an SBX board in full-duplex mode,
-the receive antenna will always be set to RX2, regardless of the settings.
+* **Note:** The user may set the receive antenna to be TX/RX or RX2. However, when using an SBX board in full-duplex mode, the receive antenna will always be set to RX2, regardless of the settings.
 
 Transmit Gains: **PGA0**, Range: 0-31.5dB
 
 Receive Gains: **PGA0**, Range: 0-31.5dB
 
-Bandwidths (Hz):
+Bandwidths:
 
-* **RX**: 40M
-* **TX**: 40M
+* **SBX**: 40 MHz, RX & TX
+* **SBX-120**: 120 MHz, RX & TX
 
 Sensors:
 
@@ -248,16 +256,56 @@ Sensors:
 
 LEDs:
 
-* All LEDs flash when dboard control is initialized
+* All LEDs flash when daughterboard control is initialized
 * **TX LD**: Transmit Synthesizer Lock Detect
 * **TX/RX**: Receiver on TX/RX antenna port (No TX)
 * **RX LD**: Receive Synthesizer Lock Detect
 * **RX1/RX2**: Receiver on RX2 antenna port
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-CBX
+CBX Series
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-See SBX Series for more details.
+
+Features:
+
+* 2 quadrature frontends (1 transmit, 1 receive)
+
+  * Defaults to direct conversion
+  * Can be used in low IF mode through lo_offset with **uhd::tune_request_t**
+
+* Independent recieve and transmit LO's and synthesizers
+
+  * Allows for full-duplex operation on different transmit and receive frequencies
+  * Can be set to use Integer-N tuning for better spur performance with **uhd::tune_request_t**
+
+Transmit Antennas: **TX/RX**
+
+Receive Antennas: **TX/RX** or **RX2**
+
+* **Frontend 0:** Complex baseband signal for selected antenna
+
+* **Note:** The user may set the receive antenna to be TX/RX or RX2. However, when using a CBX board in full-duplex mode, the receive antenna will always be set to RX2, regardless of the settings.
+
+Transmit Gains: **PGA0**, Range: 0-31.5dB
+
+Receive Gains: **PGA0**, Range: 0-31.5dB
+
+Bandwidths:
+
+* **CBX**: 40 MHz, RX & TX
+* **CBX-120**: 120 MHz, RX & TX
+
+Sensors:
+
+* **lo_locked**: boolean for LO lock state
+
+LEDs:
+
+* All LEDs flash when daughterboard control is initialized
+* **TX LD**: Transmit Synthesizer Lock Detect
+* **TX/RX**: Receiver on TX/RX antenna port (No TX)
+* **RX LD**: Receive Synthesizer Lock Detect
+* **RX1/RX2**: Receiver on RX2 antenna port
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 TVRX
@@ -274,7 +322,7 @@ Receive Gains:
 * **RF**, Range: -13.3-50.3dB (frequency-dependent)
 * **IF**, Range: -1.5-32.5dB
 
-Bandwidth: 6MHz
+Bandwidth: 6 MHz
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 TVRX2
@@ -294,7 +342,7 @@ Receive Gains:
 
 * **IF**, Range: 0.0-30.0dB
 
-Bandwidth: 1.7MHz, 6MHz, 7MHz, 8MHz, 10MHz
+Bandwidth: 1.7 MHz, 6 MHz, 7 MHz, 8 MHz, 10 MHz
 
 Sensors:
 
@@ -302,15 +350,6 @@ Sensors:
 * **rssi**: float for measured RSSI in dBm
 * **temperature**: float for measured temperature in degC
 
-------------------------------------------------------------------------
-Daughterboard Modifications
-------------------------------------------------------------------------
-
-Sometimes, daughterboards will require modification
-to work on certain frequencies or to work with certain hardware.
-Modification usually involves moving/removing an SMT component
-and burning a new daughterboard ID into the EEPROM.
-
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 DBSRX - Mod
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -324,20 +363,20 @@ over the standard daughterboard clock lines.
 
 **Step 1: Move the clock configuration resistor**
 
-Remove **R193** (which is 10 ohms, 0603 size), and put it on **R194**, which is empty.
+Remove **R193** (which is 10 Ohms, 0603 size), and put it on **R194**, which is empty.
 This is made somewhat more complicated by the fact that the silkscreen is not clear in that area.
 **R193** is on the back, immediately below the large beige connector, **J2**.
 **R194** is just below, and to the left of **R193**.
 The silkscreen for **R193** is ok, but for **R194**,
 it is upside down, and partially cut off.
-If you lose **R193**, you can use anything from 0 to 10 ohms there.
+If you lose **R193**, you can use anything from 0 to 10 Ohms there.
 
 **Step 2: Burn a new daughterboard id into the EEPROM**
 
 With the daughterboard plugged-in, run the following commands:
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     ./usrp_burn_db_eeprom --id=0x000d --unit=RX --args=<args> --slot=<slot>
 
 * **<args>** are device address arguments (optional if only one USRP device is on your machine)
@@ -357,14 +396,14 @@ Move **R64** to **R84**. Move **R142** to **R153**.
 **Step 2: Connect the motherboard blocks**
 
 Move **R35** to **R36**. Move **R117** to **R115**.
-These are all 0-ohm, so if you lose one, just short across the appropriate pads.
+These are all 0-Ohm, so if you lose one, just short across the appropriate pads.
 
 **Step 3: Burn the appropriate daughterboard ID into the EEPROM**
 
 With the daughterboard plugged-in, run the following commands:
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     ./usrp_burn_db_eeprom --id=<rx_id> --unit=RX --args=<args> --slot=<slot>
     ./usrp_burn_db_eeprom --id=<tx_id> --unit=TX --args=<args> --slot=<slot>
 
diff --git a/host/docs/general.rst b/host/docs/general.rst
index b116ba816..01d0f270c 100644
--- a/host/docs/general.rst
+++ b/host/docs/general.rst
@@ -28,6 +28,17 @@ easy to move the DC component out of your band-of-interest.  This can be done by
 passing your desired LO offset to the **tune_request_t** object, and letting the UHD
 software handle the rest.
 
+The **tune_request_t** object can also be used with certain daughterboards to use
+Integer-N tuning instead of the default fractional tuning, allowing for better spur
+performance. The daughterboards that support this functionality are:
+
+* WBX (all revisions)
+* WBX-120
+* SBX (all revisions)
+* SBX-120
+* CBX
+* CBX-120
+
 Tuning the receive chain:
 ::
 
@@ -38,10 +49,11 @@ Tuning the receive chain:
 
     //advanced tuning with tune_request_t
     uhd::tune_request_t tune_req(target_frequency_in_hz, desired_lo_offset);
+    tune_req.args = uhd::device_addr_t("mode_n=int-n"); //to use Int-N tuning
     //fill in any additional/optional tune request fields...
     usrp->set_rx_freq(tune_req);
 
-More information can be fonud in *tune_request.hpp*.
+More information can be found in `tune_request.hpp <./../../doxygen/html/structuhd_1_1tune__request__t.html>`_.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 RF front-end settling time
@@ -142,7 +154,8 @@ When the device's internal buffers become full, streaming is shut off,
 and an inline message packet is sent to the host.
 In this case the character "O" is printed to stdout as an indication.
 If the device was in continuous streaming mode,
-the UHD software will automatically restart streaming.
+the UHD software will automatically restart streaming when the buffer has
+space again.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Underflow notes
diff --git a/host/docs/gpio_api.rst b/host/docs/gpio_api.rst
new file mode 100644
index 000000000..9fd86d081
--- /dev/null
+++ b/host/docs/gpio_api.rst
@@ -0,0 +1,129 @@
+========================================================================
+UHD - X3x0 GPIO API
+========================================================================
+
+.. contents:: Table of Contents
+
+------------------------------------------------------------------------
+The X3x0 Front Panel GPIO
+------------------------------------------------------------------------
+The X3x0 is the first USRP device to offer an auxiliary GPIO connection on the
+motherboard itself (independent of the daughterboards). These GPIO pins are
+controlled directly by the FPGA, where they are controlled by an ATR (Automatic
+Transmit / Receive). This allows them to be toggled simultaneously with other
+radio-level changes (e.g., enabling or disabling a TX or RX mixer).
+
+
+^^^^^^^^^^^^^^^^
+Front Panel GPIO
+^^^^^^^^^^^^^^^^
+
+Connector
+:::::::::
+
+.. image:: ./res/x3x0_gpio_conn.png
+   :scale: 75%
+   :align: left
+
+Pin Mapping
+:::::::::::
+
+* Pin 1:  +3.3V
+* Pin 2:  Data[0]
+* Pin 3:  Data[1]
+* Pin 4:  Data[2]
+* Pin 5:  Data[3]
+* Pin 6:  Data[4]
+* Pin 7:  Data[5]
+* Pin 8:  Data[6]
+* Pin 9:  Data[7]
+* Pin 10: Data[8]
+* Pin 11: Data[9]
+* Pin 12: Data[10]
+* Pin 13: Data[11]
+* Pin 14: 0V
+* Pin 15: 0V
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Explaining ATR
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+ATR works by defining the value of the GPIO pins for certain states of the
+radio. This is the "automatic" part of it. For example, you can tell UHD that
+when the radio is transmitting and receiving (full duplex), GPIO6 should be
+high, but when it is only transmitting, GPI06 should be low. This state machine
+is set up using a series of GPIO attributes, with paired values and a mask,
+which you will want to define for the GPIO pins you intend to use. To set up
+the ATR, you use the **multi_usrp** function *set_gpio_attr*. 
+
+* **CTRL**: Is this pin controlled by ATR (automatic), or by manual control
+  only?
+* **DDR**: "Data Direction Register" - defines whether or not a GPIO is an
+  output or an input.
+* **OUT**: Manually set the value of a pin (only to be used in non-ATR mode).
+* **ATR_0X**: The status of the pins when the radio is **idle**.
+* **ATR_RX**: The status of the pins when the radio is only **receiving**.
+* **ATR_TX**: The status of the pins when the radio is only **transmitting**.
+* **ATR_XX**: The status of the pins when the radio is in **full-duplex** mode.
+
+The counterpart to setting the ATR (the "getter"), is called *get_gpio_attr*.
+It has the exact same attributes as above, and has one more:
+
+* **READBACK**: Readback the GPIOs marked as inputs.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+An Example
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The front panel X3x0 GPIO bank is enumerated in the motherboard property tree
+("*<mb_path>/gpio/FP0/*"), and so is easily accessible through the standard
+**multi_usrp** UHD interface.
+
+You can discover this using the *get_gpio_banks* function in **multi_usrp**.
+This will tell you that there is a GPIO bank on your X3x0 called "FP0". This is
+the bank we want to set-up.
+
+Let's say we want to use GPIO6 for an external amp. We want it to be
+automatically controlled by ATR as an output, and we want it to be high when we
+are transmitting, and low in all other cases. We are also using GPIO4, which
+we want to control manually, as an output. We can set this up with the following
+code:
+
+::
+
+    // set up our masks, defining the pin numbers
+    #define AMP_GPIO_MASK   (1 << 6)
+    #define MAN_GPIO_MASK   (1 << 4)
+
+    #define ATR_MASKS       (AMP_GPIO_MASK | MAN_GPIO_MASK)
+
+    // set up our values for ATR control: 1 for ATR, 0 for manual
+    #define ATR_CONTROL     (AMP_GPIO_MASK & ~MAN_GPIO_MASK)
+
+    // set up the GPIO directions: 1 for output, 0 for input
+    #define GPIO_DDR        (AMP_GPIO_MASK & ~MAN_GPIO_MASK)
+
+    // assume an existing USRP device handle, called "usrp_x300"
+
+    // now, let's do the basic ATR setup
+    usrp_x300->set_gpio_attr("FP0", "CTRL", ATR_CONTROL, ATR_MASKS);
+    usrp_x300->set_gpio_attr("FP0", "DDR", GPIO_DDR, ATR_MASKS);
+
+    // let's manually set GPIO4 high
+    usrp_x300->set_gpio_attr("FP0", "OUT", 1, MAN_GPIO_MASK);
+
+    // finally, let's set up GPIO6 as we described above
+    usrp_x300->set_gpio_attr("FP0", "ATR_0X", 0, AMP_GPIO_MASK);
+    usrp_x300->set_gpio_attr("FP0", "ATR_RX", 0, AMP_GPIO_MASK);
+    usrp_x300->set_gpio_attr("FP0", "ATR_TX", 0, AMP_GPIO_MASK);
+    usrp_x300->set_gpio_attr("FP0", "ATR_XX", 0, AMP_GPIO_MASK);
+
+After the above code is run, the ATR in the FPGA will automatically control
+GPIO6, as we have described, based on the radio state, and we have direct
+manual control over GPIO4.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Further Information
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+For more information, see the Doxygen API documentation:
+
+* `multi_usrp API <./../../doxygen/html/classuhd_1_1usrp_1_1multi__usrp.html>`_
diff --git a/host/docs/gpsdo.rst b/host/docs/gpsdo.rst
index 3b718fc20..8ffff8672 100644
--- a/host/docs/gpsdo.rst
+++ b/host/docs/gpsdo.rst
@@ -4,8 +4,13 @@ UHD - Internal GPSDO Application Notes (USRP-N2x0/E1X0 Models)
 
 .. contents:: Table of Contents
 
-This application note describes the use of integrated GPS-disciplined
-oscillators with Ettus Research USRP devices.
+This application note describes the use of integrated GPS-disciplined oscillators (GPSDOs) for
+the USRP N-Series and E1xx. For information regarding the GPSDO that is compatible with
+the USRP X-Series, please see:
+
+`USRP-X3x0 Internal GPSDO Device Manual <./gpsdo_x3x0.html>`_
+
+=======
 
 ------------------------------------------------------------------------
 Specifications
@@ -16,11 +21,11 @@ Specifications
 * **Holdover**: <11us over 3h
 * **Phase noise**:
 
-  * **1Hz:** -80dBc/Hz
-  * **10Hz:** -110dBc/Hz
-  * **100Hz:** -135dBc/Hz
-  * **1kHz:** -145dBc/Hz
-  * **10kHz:** <-145dBc/Hz
+  * **1Hz:** -80 dBc/Hz
+  * **10Hz:** -110 dBc/Hz
+  * **100Hz:** -135 dBc/Hz
+  * **1kHz:** -145 dBc/Hz
+  * **10kHz:** <-145 dBc/Hz
 
 **Antenna Types:**
 
@@ -29,7 +34,7 @@ The GPSDO is capable of supplying a 3V for active GPS antennas or supporting pas
 ------------------------------------------------------------------------
 Installation Instructions
 ------------------------------------------------------------------------
-Installation instructions can be found here:
+Instructions for mounting the GPSDO kit onto your USRP device can be found here:
 `http://www.ettus.com/content/files/gpsdo-kit_2.pdf <http://www.ettus.com/content/files/gpsdo-kit_2.pdf>`_
 
 ********************************************
@@ -40,7 +45,7 @@ Post-installation Task (N-Series only)
 
 This is necessary if you require absolute GPS time in your application
 or need to communicate with the GPSDO to obtain location, satellite info, etc.
-If you only require 10MHz and PPS signals for reference or MIMO use
+If you only require 10 MHz and PPS signals for reference or MIMO use
 (see the `Synchronization Application Notes <./sync.html>`_),
 it is not necessary to perform this step.
 
@@ -49,7 +54,7 @@ To configure the USRP to communicate with the GPSDO, use the
 
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     ./usrp_burn_mb_eeprom --args=<optional device args> --key=gpsdo --val=internal
 
     -- restore original setting --
@@ -61,7 +66,7 @@ Using the GPSDO in Your Application
 By default, if a GPSDO is detected at startup, the USRP will be configured
 to use it as a frequency and time reference. The internal VITA timestamp
 will be initialized to the GPS time, and the internal oscillator will be
-phase-locked to the 10MHz GPSDO reference. If the GPSDO is not locked to
+phase-locked to the 10 MHz GPSDO reference. If the GPSDO is not locked to
 satellites, the VITA time will not be initialized.
 
 GPS data is obtained through the **mboard_sensors** interface. To retrieve
diff --git a/host/docs/gpsdo_b2x0.rst b/host/docs/gpsdo_b2x0.rst
index 8bc363e97..a0815d23a 100644
--- a/host/docs/gpsdo_b2x0.rst
+++ b/host/docs/gpsdo_b2x0.rst
@@ -1,5 +1,5 @@
 ========================================================================
-UHD - Internal GPSDO Application Notes (USRP-B2X0 Models)
+UHD - Internal GPSDO Application Notes (USRP-B2x0 Models)
 ========================================================================
 
 .. contents:: Table of Contents
@@ -17,21 +17,21 @@ Specifications
 
 **Phase noise**:
 
-+------------+-------------+------------+
-|            |     TCXO    |    OXCO    |
-+============+=============+============+
-| **1Hz**    | -65dBc/Hz   | -75dBc/Hz  |
-+------------+-------------+------------+
-| **10Hz**   |  -102dBc/Hz | -110dBc/Hz |
-+------------+-------------+------------+
-| **100Hz**  | -132dBc/Hz  | -132dBc/Hz |
-+------------+-------------+------------+
-| **1kHz**   | -148dBc/Hz  | -142dBc/Hz |
-+------------+-------------+------------+
-| **10kHz**  | -152dBc/Hz  | -145dBc/Hz |
-+------------+-------------+------------+
-| **100kHz** | <-155dBc/Hz | -150dBc/Hz |
-+------------+-------------+------------+
++------------+-------------+
+|            |     TCXO    |
++============+=============+
+| **1Hz**    | -65dBc/Hz   |
++------------+-------------+
+| **10Hz**   |  -102dBc/Hz |
++------------+-------------+
+| **100Hz**  | -132dBc/Hz  |
++------------+-------------+
+| **1kHz**   | -148dBc/Hz  |
++------------+-------------+
+| **10kHz**  | -152dBc/Hz  |
++------------+-------------+
+| **100kHz** | <-155dBc/Hz |
++------------+-------------+
 
 **Antenna Types:**
 
diff --git a/host/docs/gpsdo_x3x0.rst b/host/docs/gpsdo_x3x0.rst
new file mode 100644
index 000000000..0d4d31f3b
--- /dev/null
+++ b/host/docs/gpsdo_x3x0.rst
@@ -0,0 +1,82 @@
+========================================================================
+UHD - Internal GPSDO Application Notes (USRP-X3x0 Models)
+========================================================================
+
+.. contents:: Table of Contents
+
+This application note describes the use of the board-mounted GPS Disciplined OCXO, 
+as used with the USRP X300/X310.  For information regarding the GPSDO that is 
+compatible with the USRP N2xx or E1xx, please see:
+
+`USRP-N2x0/E1x0 Internal GPSDO Device Manual <./gpsdo.html>`_
+
+------------------------------------------------------------------------
+Specifications
+------------------------------------------------------------------------
+* **Receiver type**: 50 channel with WAAS, EGNOS, MSAS
+* **10 MHz ADEV**: 5e-11 over >24h
+* **1PPS RMS jitter**: <50ns 1-sigma
+* **Holdover**: <20us over 3h
+
+**Phase noise**:
+
++------------+------------+
+|            |    OCXO    |
++============+============+
+| **1Hz**    | -75dBc/Hz  |
++------------+------------+
+| **10Hz**   | -110dBc/Hz |
++------------+------------+
+| **100Hz**  | -132dBc/Hz |
++------------+------------+
+| **1kHz**   | -142dBc/Hz |
++------------+------------+
+| **10kHz**  | -145dBc/Hz |
++------------+------------+
+| **100kHz** | -150dBc/Hz |
++------------+------------+
+
+**Antenna Types:**
+
+The GPSDO is capable of supplying a 3V for active GPS antennas or supporting passive antennas.
+
+------------------------------------------------------------------------
+Installation Instructions
+------------------------------------------------------------------------
+To install the GPSDO, you must insert it into the slot on the board
+near the 10 MHz Reference SMA. Keep in mind that the two sides of the
+GPSDO have a different number of pins. When inserting the GPSDO, make
+sure to press down firmly and evenly. When turning on the USRP B2X0 device,
+a green LED should illuminate on the GPSDO. This signifies that the unit
+has successfully been placed.
+
+**NOTE: The pins on the GPSDO are very fragile. Be sure to press down
+evenly, or the pins may bend or break. Once the GPSDO is in place,
+we very highly discourage further removal, as this also risks damaging
+the pins.**
+
+------------------------------------------------------------------------
+Using the GPSDO in Your Application
+------------------------------------------------------------------------
+By default, if a GPSDO is detected at startup, the USRP will be configured
+to use it as a frequency and time reference. The internal VITA timestamp
+will be initialized to the GPS time, and the internal oscillator will be
+phase-locked to the 10MHz GPSDO reference. If the GPSDO is not locked to
+satellites, the VITA time will not be initialized.
+
+GPS data is obtained through the **mboard_sensors** interface. To retrieve
+the current GPS time, use the **gps_time** sensor:
+
+::
+
+    usrp->get_mboard_sensor("gps_time");
+
+The returned value will be the current epoch time, in seconds since
+January 1, 1970. This value is readily converted into human-readable
+format using the **time.h** library in C, **boost::posix_time** in C++, etc.
+
+Other information can be fetched as well. You can query the lock status
+with the **gps_locked** sensor, as well as obtain raw NMEA sentences using
+the **gps_gprmc**, and **gps_gpgga** sensors. Location
+information can be parsed out of the **gps_gpgga** sensor by using **gpsd** or
+another NMEA parser.
diff --git a/host/docs/identification.rst b/host/docs/identification.rst
index ba9b30898..cbae25082 100644
--- a/host/docs/identification.rst
+++ b/host/docs/identification.rst
@@ -1,38 +1,40 @@
-========================================================================
+=================================
 UHD - Device Identification Notes
-========================================================================
+=================================
 
 .. contents:: Table of Contents
 
-------------------------------------------------------------------------
+------------------------
 Identifying USRP Devices
-------------------------------------------------------------------------
+------------------------
 Devices are addressed through key/value string pairs.
 These string pairs can be used to narrow down the search for a specific device or group of devices.
 Most UHD utility applications and examples have an **--args** parameter that takes a device address, which is expressed as a delimited string.
 
 See the documentation in **types/device_addr.hpp** for reference.
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^
 Common device identifiers
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^
 Every device has several ways of identifying it on the host system:
 
-+------------+------------+--------------------------------------------+
-| Identifier | Key        | Notes                                      |
-+============+============+============================================+
-| Serial     | serial     | globally unique identifier                 |
-+------------+------------+--------------------------------------------+
-| Address    | addr       | unique identifier on a network             |
-+------------+------------+--------------------------------------------+
-| Name       | name       | optional user-set identifier               |
-+------------+------------+--------------------------------------------+
-| Type       | type       | hardware series identifier                 |
-+------------+------------+--------------------------------------------+
-
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
++------------+----------+-----------------------------------------------------------+-------------------------------
+| Identifier | Key      | Notes                                                     | Example
++============+==========+===========================================================+===============================
+| Serial     | serial   | globally unique identifier                                | 12345678
++------------+----------+-----------------------------------------------------------+----------------------------
+| Address    | addr     | unique identifier on a network                            | 192.168.10.2
++------------+----------+-----------------------------------------------------------+-------------------------------
+| Resource   | resource | unique identifier for USRP RIO devices (over PCI Express) | RIO0
++------------+----------+-----------------------------------------------------------+-------------------------------
+| Name       | name     | optional user-set identifier                              | my_usrp1 (User-defined value)
++------------+----------+-----------------------------------------------------------+----------------------------
+| Type       | type     | hardware series identifier                                | usrp1, usrp2, 
++------------+----------+-----------------------------------------------------------+----------------------------
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Device discovery via command line
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Devices attached to your system can be discovered using the **uhd_find_devices** program.
 This program scans your system for supported devices and prints
 out an enumerated list of discovered devices and their addresses.
@@ -52,9 +54,9 @@ Device address arguments can be supplied to narrow the scope of the search.
 
     uhd_find_devices --args="serial=12345678"
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Device discovery through the API
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 The **device::find()** API call searches for devices and returns a list of discovered devices.
 
 ::
@@ -76,21 +78,22 @@ The **hint** argument can be populated to narrow the scope of the search.
     hint["serial"] = "12345678";
     uhd::device_addrs_t dev_addrs = uhd::device::find(hint);
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^
 Device properties
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^
 Properties of devices attached to your system can be probed with the **uhd_usrp_probe** program.
 This program constructs an instance of the device and prints out its properties,
 such as detected daughterboards, frequency range, gain ranges, etc...
 
 **Usage:**
+
 ::
 
     uhd_usrp_probe --args <device-specific-address-args>
 
-------------------------------------------------------------------------
+--------------------
 Naming a USRP Device
-------------------------------------------------------------------------
+--------------------
 For convenience purposes, users may assign a custom name to their USRP device.
 The USRP device can then be identified via name, rather than a difficult to remember serial or address.
 
@@ -100,22 +103,24 @@ A name has the following properties:
 * is 0-20 characters
 * is not required to be unique
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^
 Set a custom name
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^
 
 Run the following commands:
+
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     ./usrp_burn_mb_eeprom --args=<optional device args> --key=name --val=lab1_xcvr
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^
 Discovery via name
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^
 
 The keyword **name** can be used to narrow the scope of the search.
 Example with the find devices utility:
+
 ::
 
     uhd_find_devices --args="name=lab1_xcvr"
diff --git a/host/docs/images.rst b/host/docs/images.rst
index 95e2d96b0..37fbabf4b 100644
--- a/host/docs/images.rst
+++ b/host/docs/images.rst
@@ -12,9 +12,12 @@ The methods of loading images into the device vary among devices:
 
 * **USRP1:** The host code will automatically load the firmware and FPGA at runtime.
 * **USRP2:** The user must manually write the images onto the USRP2 SD card.
-* **USRP-N Series:** The user must manually transfer the images over ethernet.
+* **USRP-N Series:** The user programs an image into on-board storage, which
+  then is automatically loaded at runtime.
 * **USRP-E Series:** The host code will automatically load the FPGA at runtime.
 * **USRP-B Series:** The host code will automatically load the FPGA at runtime.
+* **USRP-X Series:** The user programs an image into on-board storage, which
+  then is automatically loaded at runtime. 
 
 ------------------------------------------------------------------------
 Pre-built Images
@@ -25,8 +28,6 @@ Pre-built images are available for download.
 * `Master Branch images <http://files.ettus.com/binaries/master_images/>`_
 * `Maint Branch images <http://files.ettus.com/binaries/maint_images/>`_
 
-See the UHD wiki for the download link.
-
 The pre-built images come in two forms:
 
 * bundled with UHD software in a platform-specific installer
@@ -36,11 +37,10 @@ The pre-built images come in two forms:
 UHD Images Downloader
 ^^^^^^^^^^^^^^^^^^^^^^
 
-The UHD Images Downloader is a new feature in UHD 003.005.000. This script downloads UHD images that
-are guaranteed to be compatible with the host code and places them in the default images
-directory.
+The UHD images downloader downloads UHD images compatible with the host code
+and places them in the default images directory.
 
-By default, it can be found at: **<install-path>/share/uhd/utils/uhd_images_downloader.py**
+By default, it can be found at: **<install-path>/lib/uhd/utils/uhd_images_downloader.py**
 
 By default, it installs images to: **<install-path>/share/uhd/images**
 
@@ -79,10 +79,25 @@ The build commands for a particular image can be found in **<uhd-repo-path>/imag
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Xilinx FPGA builds
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Xilinx ISE 12.x and up is required to build the Xilinx FPGA images.
+USRP Xilinx FPGA images are built with two different versions of ISE, depending
+on the device.
+
 The build requires that you have a UNIX-like environment with **Make**.
 Make sure that **xtclsh** from the Xilinx ISE bin directory is in your **$PATH**.
 
+
+**Xilinx ISE 14.4**
+* USRP X3x0 Series
+
+See **<uhd-repo-path>/fpga/usrp3/top/**.
+
+**Xilinx ISE 12.2**
+* USRP N2x0
+* USRP B2x0
+* USRP B1x0
+* USRP E1x0
+* USRP2
+
 See **<uhd-repo-path>/fpga/usrp2/top/**.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -97,7 +112,7 @@ See **<uhd-repo-path>/firmware/zpu**.
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Altera FPGA builds
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Quartus is required to build the Altera FPGA images.
+Quartus is required to build the Altera FPGA image for the USRP1.
 Pre-built images can also be found in **<uhd-repo-path>/fpga/usrp1/rbf**.
 
 See **<uhd-repo-path>/fpga/usrp1/toplevel/***.
diff --git a/host/docs/index.rst b/host/docs/index.rst
index 65069059f..cbab651c1 100644
--- a/host/docs/index.rst
+++ b/host/docs/index.rst
@@ -18,25 +18,48 @@ Building and Installing UHD Software
 * `Installation Guide (Windows) <http://code.ettus.com/redmine/ettus/projects/uhd/wiki/UHD_Windows>`_
 
 ^^^^^^^^^^^^^^^^^^^^^
-Application Notes
+General UHD Manuals
 ^^^^^^^^^^^^^^^^^^^^^
 * `General Application Notes <./general.html>`_
 * `Device Identification Notes <./identification.html>`_
 * `Firmware and FPGA Image Notes <./images.html>`_
-* `USRP1 Application Notes <./usrp1.html>`_
-* `USRP2 Application Notes <./usrp2.html>`_
-* `USRP-N2X0 Series Application Notes <./usrp2.html>`_
-* `USRP-B100 Series Application Notes <./usrp_b100.html>`_
-* `USRP-B2X0 Series Application Notes <./usrp_b200.html>`_
-* `USRP-E1X0 Series Application Notes <./usrp_e1x0.html>`_
 * `Daughterboard Application Notes <./dboards.html>`_
 * `Transport Application Notes <./transport.html>`_
 * `Synchronization Application Notes <./sync.html>`_
-* `Internal GPSDO Application Notes (USRP-N2X0/E1X0 Models) <./gpsdo.html>`_
-* `Internal GPSDO Application Notes (USRP-B2X0 Models) <./gpsdo_b2x0.html>`_
 * `Calibration Application Notes <./calibration.html>`_
 
 ^^^^^^^^^^^^^^^^^^^^^
+USRP N-Series Devices
+^^^^^^^^^^^^^^^^^^^^^
+* `USRP-N2x0 Series Device Manual <./usrp2.html>`_
+* `USRP-N2x0 Internal GPSDO Device Manual <./gpsdo_x3x0.html>`_
+
+^^^^^^^^^^^^^^^^^^^^^
+USRP B-Series Devices
+^^^^^^^^^^^^^^^^^^^^^
+* `USRP-B100 Series Device Manual <./usrp_b100.html>`_
+* `USRP-B2x0 Series Device Manual <./usrp_b200.html>`_
+* `USRP1 Device Manual <./usrp1.html>`_
+
+^^^^^^^^^^^^^^^^^^^^^
+USRP E-Series Devices
+^^^^^^^^^^^^^^^^^^^^^
+* `USRP-E1x0 Series Device Manual <./usrp_e1x0.html>`_
+* `USRP-E1x0 Internal GPSDO Device Manual <./gpsdo.html>`_
+
+^^^^^^^^^^^^^^^^^^^^^
+USRP X-Series Devices
+^^^^^^^^^^^^^^^^^^^^^
+* `USRP-X3x0 Series Device Manual <./usrp_x3x0.html>`_
+* `USRP-X3x0 Internal GPSDO Device Manual <./gpsdo_x3x0.html>`_
+* `USRP-X3x0 Front Panel GPIO API <./gpio_api.html>`_
+
+^^^^^^^^^^^^^^^^^^^^^
+USRP Legacy Series
+^^^^^^^^^^^^^^^^^^^^^
+* `USRP2 Device Manual <./usrp2.html>`_
+
+^^^^^^^^^^^^^^^^^^^^^
 API Documentation
 ^^^^^^^^^^^^^^^^^^^^^
 * `Doxygen <./../../doxygen/html/index.html>`_
diff --git a/host/docs/res/x3x0_fp_overlay.png b/host/docs/res/x3x0_fp_overlay.png
new file mode 100644
index 000000000..8ab88d4a3
--- /dev/null
+++ b/host/docs/res/x3x0_fp_overlay.png
diff --git a/host/docs/res/x3x0_gpio_conn.png b/host/docs/res/x3x0_gpio_conn.png
new file mode 100644
index 000000000..0147bf422
--- /dev/null
+++ b/host/docs/res/x3x0_gpio_conn.png
diff --git a/host/docs/res/x3x0_rp_overlay.png b/host/docs/res/x3x0_rp_overlay.png
new file mode 100644
index 000000000..c34936ac3
--- /dev/null
+++ b/host/docs/res/x3x0_rp_overlay.png
diff --git a/host/docs/stream.rst b/host/docs/stream.rst
index a00ef88ee..337d7ca40 100644
--- a/host/docs/stream.rst
+++ b/host/docs/stream.rst
@@ -16,7 +16,7 @@ A TX stream allows the user to transmit samples to the device.
 Link Layer Encapsulation
 ------------------------------------------------------------------------
 The VITA49 standard provides encapsulation for sample data across a link layer.
-On all generation2 hardware, samples are encapsulated into VRT IF data packets.
+On all second generation hardware (and later), samples are encapsulated into VRT IF data packets.
 These packets also provide sample decoration such as stream time and burst flags.
 Sample decoration is exposed to the user in the form of RX and TX metadata structs.
 
@@ -54,6 +54,6 @@ Conversion
 The user may request arbitrary combinations of host and link data types;
 however, not all combinations are supported.
 The user may register custom data type formats and conversion routines.
-See **uhd/convert.hpp** for futher documentation.
+See **uhd/convert.hpp** for further documentation.
 
 TODO: provide example of convert API
diff --git a/host/docs/sync.rst b/host/docs/sync.rst
index a1f6cb7df..21be60a20 100644
--- a/host/docs/sync.rst
+++ b/host/docs/sync.rst
@@ -153,7 +153,7 @@ For transmit, a burst is started when the user calls send(). The metadata should
     size_t num_tx_samps = tx_streamer->send(buffs, samps_to_send, md);
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Align LOs in the front-end (SBX/WBX + N-Series)
+Align LOs in the front-end (SBX, WBX, CBX)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Using timed commands, multiple frontends can be tuned at a specific time.
 This timed-tuning ensures that the phase offsets between VCO/PLL chains
@@ -163,7 +163,7 @@ will remain constant after each re-tune. See notes below:
 * This phase offset is different for different LO frequencies
 * This phase offset remains constant after retuning
 
-  * Due to divider, WBX phase offset will be randomly +/- 180 deg after re-tune
+  * Due to a divider, WBX phase offset will be randomly +/- 180 deg after re-tune
 
 * This phase offset will drift over time due to thermal and other characteristics
 * Periodic calibration will be necessary for phase-coherent applications
diff --git a/host/docs/transport.rst b/host/docs/transport.rst
index 79d2743a4..88f787893 100644
--- a/host/docs/transport.rst
+++ b/host/docs/transport.rst
@@ -7,14 +7,14 @@ UHD - Transport Application Notes
 ------------------------------------------------------------------------
 Introduction
 ------------------------------------------------------------------------
-A transport is the layer between the packet interface and a device IO interface.
-The advanced user can pass optional parameters
-into the underlying transport layer through the device address.
-These optional parameters control how the transport object allocates memory,
-resizes kernel buffers, spawns threads, etc.
-When not spcified, the transport layer will use values for these parameters
-that are known to perform well on a variety of systems.
-The transport parameters are defined below for the various transports in the UHD software:
+A transport is the layer between the packet interface and a device IO
+interface.  The advanced user can pass optional parameters into the underlying
+transport layer through the device address.  These optional parameters control
+how the transport object allocates memory, resizes kernel buffers, spawns
+threads, etc.  When not spcified, the transport layer will use values for these
+parameters that are known to perform well on a variety of systems.  The
+transport parameters are defined below for the various transports in the UHD
+software:
 
 ------------------------------------------------------------------------
 UDP Transport (Sockets)
@@ -147,7 +147,7 @@ so that non-root users may access the device:
 
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     sudo cp uhd-usrp.rules /etc/udev/rules.d/
     sudo udevadm control --reload-rules
     sudo udevadm trigger
diff --git a/host/docs/uhd_cal_rx_iq_balance.1 b/host/docs/uhd_cal_rx_iq_balance.1
index 073d8ce63..8c2c87ece 100644
--- a/host/docs/uhd_cal_rx_iq_balance.1
+++ b/host/docs/uhd_cal_rx_iq_balance.1
@@ -1,4 +1,4 @@
-.TH "uhd_cal_rx_iq_balance" "1" "3.5.1" "UHD" "User Commands"
+.TH "uhd_cal_rx_iq_balance" "1" "3.7.0" "UHD" "User Commands"
 .SH NAME
 uhd_cal_rx_iq_balance \- Generate RX IQ Balance Calibration Table for a UHD Device
 .SH DESCRIPTION
diff --git a/host/docs/uhd_cal_tx_dc_offset.1 b/host/docs/uhd_cal_tx_dc_offset.1
index d64120242..f0479d7ec 100644
--- a/host/docs/uhd_cal_tx_dc_offset.1
+++ b/host/docs/uhd_cal_tx_dc_offset.1
@@ -1,4 +1,4 @@
-.TH "uhd_cal_tx_dc_offset" "1" "3.5.1" "UHD" "User Commands"
+.TH "uhd_cal_tx_dc_offset" "1" "3.7.0" "UHD" "User Commands"
 .SH NAME
 uhd_cal_tx_dc_offset \- Generate TX DC Offset Calibration Table for a UHD Device
 .SH DESCRIPTION
diff --git a/host/docs/uhd_cal_tx_iq_balance.1 b/host/docs/uhd_cal_tx_iq_balance.1
index f4fdbd12f..bb8970f4c 100644
--- a/host/docs/uhd_cal_tx_iq_balance.1
+++ b/host/docs/uhd_cal_tx_iq_balance.1
@@ -1,4 +1,4 @@
-.TH "uhd_cal_tx_iq_balance" "1" "3.5.1" "UHD" "User Commands"
+.TH "uhd_cal_tx_iq_balance" "1" "3.7.0" "UHD" "User Commands"
 .SH NAME
 uhd_cal_tx_iq_balance \- Generate TX IQ Balance Calibration Table for a UHD Device
 .SH DESCRIPTION
diff --git a/host/docs/uhd_find_devices.1 b/host/docs/uhd_find_devices.1
index 08f9a789c..416f807b9 100644
--- a/host/docs/uhd_find_devices.1
+++ b/host/docs/uhd_find_devices.1
@@ -1,4 +1,4 @@
-.TH "uhd_find_devices" 1 "3.5.1" UHD "User Commands"
+.TH "uhd_find_devices" 1 "3.7.0" UHD "User Commands"
 .SH NAME
 uhd_find_devices \- USRP Hardware Driver Discovery Utility
 .SH DESCRIPTION
diff --git a/host/docs/uhd_images_downloader.1 b/host/docs/uhd_images_downloader.1
index 28310dd37..dd0fe208d 100644
--- a/host/docs/uhd_images_downloader.1
+++ b/host/docs/uhd_images_downloader.1
@@ -1,4 +1,4 @@
-.TH "uhd_images_downloader" 1 "3.5.1" UHD "User Commands"
+.TH "uhd_images_downloader" 1 "3.7.0" UHD "User Commands"
 .SH NAME
 uhd_images_downloader \- USRP Hardware Driver firmware/FPGA downloader
 .SH DESCRIPTION
@@ -12,7 +12,7 @@ matching this UHD driver release onto the host system. If the uhd-images
 package is installed, there is no need to run this installer.
 .SH SYNOPSIS
 .B uhd_images_downloader
-Usage: uhd_images_downloader.py [options]
+Usage: uhd_images_downloader [options]
 .SH OPTIONS
 This program works best without any arguments.
 .PP
@@ -38,7 +38,7 @@ usrp2_card_burner(1) usrp_n2xx_simple_net_burner(1)
 This manual page was written by Maitland Bottoms and Nicholas Corgan
 for the Debian project (but may be used by others).
 .SH COPYRIGHT
-Copyright (c) 2012 Ettus Research LLC
+Copyright (c) 2012,2014 Ettus Research LLC
 .LP
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/host/docs/uhd_usrp_probe.1 b/host/docs/uhd_usrp_probe.1
index a6c7150ee..ee30b2350 100644
--- a/host/docs/uhd_usrp_probe.1
+++ b/host/docs/uhd_usrp_probe.1
@@ -1,4 +1,4 @@
-.TH "uhd_usrp_probe" 1 "3.5.1" UHD "User Commands"
+.TH "uhd_usrp_probe" 1 "3.7.0" UHD "User Commands"
 .SH NAME
 uhd_usrp_probe \- USRP Hardware Driver Peripheral Report Utility
 .SH DESCRIPTION
diff --git a/host/docs/usrp1.rst b/host/docs/usrp1.rst
index b6fd24b09..be74fe00a 100644
--- a/host/docs/usrp1.rst
+++ b/host/docs/usrp1.rst
@@ -1,5 +1,5 @@
 ========================================================================
-UHD - USRP1 Application Notes
+UHD - USRP1 Device Manual
 ========================================================================
 
 .. contents:: Table of Contents
@@ -8,12 +8,20 @@ UHD - USRP1 Application Notes
 Comparative features list
 ------------------------------------------------------------------------
 
-* 2 transceiver card slots
-* 2 RX DDC chains in FPGA
-* 2 TX DUC chains in FPGA (no TX CORDIC -> uses DAC)
-* 64 MHz fixed clock rate
-* sc16 sample modes
-* sc8 sample mode - RX only
+**Hardware Capabilities:**
+ * 2 transceiver card slots
+ * 64 MHz fixed clock rate
+
+**FPGA Capabilities:**
+ * 2 RX DDC chains in FPGA
+ * 2 TX DUC chains in FPGA (no TX CORDIC -> uses DAC)
+ * sc16 sample modes - RX & TX
+
+   - Up to 8 MHz of RF BW with 16-bit samples
+
+ * sc8 sample mode - RX only
+
+   - Up to 16 MHz of RF BW with 8-bit samples
 
 ------------------------------------------------------------------------
 Specify a Non-standard Image
@@ -93,7 +101,7 @@ so UHD software can initialize with the correct clock rate.
 Run the following commands to record the setting into the EEPROM:
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     ./usrp_burn_mb_eeprom --args=<optional device args> --key=mcr --val=<rate>
 
 The user may override the clock rate specified in the EEPROM by using a device address:
diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst
index 8ef31af1a..361d98f01 100644
--- a/host/docs/usrp2.rst
+++ b/host/docs/usrp2.rst
@@ -1,5 +1,5 @@
 ========================================================================
-UHD - USRP2 and N2X0 Series Application Notes
+UHD - USRP2 and N2x0 Series Device Manual
 ========================================================================
 
 .. contents:: Table of Contents
@@ -8,23 +8,29 @@ UHD - USRP2 and N2X0 Series Application Notes
 Comparative features list
 ------------------------------------------------------------------------
 
-* 1 transceiver card slot
-* 2 RX DDC chains in FPGA
-* 1 TX DUC chain in FPGA
-* Timed commands in FPGA (N2x0 only)
-* Timed sampling in FPGA
-* External PPS reference
-* External 10MHz reference
-* MIMO cable shared reference
-* Fixed 100 MHz clock rate
-* Internal GPSDO option (N2x0 only)
-* sc8 and sc16 sample modes
+**Hardware Capabilities:**
+ * 1 transceiver card slot
+ * External PPS reference input
+ * External 10 MHz reference input
+ * MIMO cable shared reference
+ * Fixed 100 MHz clock rate
+ * Internal GPSDO option (N2x0 only)
+
+**FPGA Capabilities:**
+ * 2 RX DDC chains in FPGA
+ * 1 TX DUC chain in FPGA
+ * Timed commands in FPGA (N2x0 only)
+ * Timed sampling in FPGA
+ * 16-bit and 8-bit sample modes (sc8 and sc16)
+
+   * Up to 25 MHz of RF BW with 16-bit samples
+   * Up to 50 MHz of RF BW with 8-bit samples
 
 ------------------------------------------------------------------------
 Load the Images onto the SD card (USRP2 only)
 ------------------------------------------------------------------------
 **Warning!**
-Use **usrp2_card_burner.py** with caution. If you specify the wrong device node,
+Use **usrp2_card_burner** with caution. If you specify the wrong device node,
 you could overwrite your hard drive. Make sure that **--dev=** specifies the SD card.
 
 **Warning!**
@@ -41,11 +47,11 @@ Use the card burner tool (UNIX)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ::
 
-    sudo <install-path>/share/uhd/utils/usrp2_card_burner_gui.py
+    sudo <install-path>/lib/uhd/utils/usrp2_card_burner_gui.py
 
     -- OR --
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     sudo ./usrp2_card_burner.py --dev=/dev/sd<XXX> --fpga=<path_to_fpga_image>
     sudo ./usrp2_card_burner.py --dev=/dev/sd<XXX> --fw=<path_to_firmware_image>
 
@@ -58,51 +64,46 @@ Use the card burner tool (Windows)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ::
 
-    <path_to_python.exe> <install-path>/share/uhd/utils/usrp2_card_burner_gui.py
+    <path_to_python.exe> <install-path>/lib/uhd/utils/usrp2_card_burner_gui.py
 
 ------------------------------------------------------------------------
 Load the Images onto the On-board Flash (USRP-N Series only)
 ------------------------------------------------------------------------
-The USRP-N Series can be reprogrammed over the network
-to update or change the firmware and FPGA images.
+The USRP-N Series can be reprogrammed over the network to update or change the firmware and FPGA images.
 When updating images, always burn both the FPGA and firmware images before power cycling.
 This ensures that when the device reboots, it has a compatible set of images to boot into.
 
-**Note:**
-Different hardware revisions require different FPGA images.
-Determine the revision number from the sticker on the rear of the chassis.
-Use this number to select the correct FPGA image for your device.
-
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Use the net burner tool (UNIX)
+Use the net burner tool
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ::
 
-    <install-path>/share/uhd/utils/usrp_n2xx_net_burner_gui.py
+    Use default images:
+    usrp_n2xx_simple_net_burner --addr=<IP address>
 
-    -- OR --
+    Use custom-built images:
+    usrp_n2xx_simple_net_burner --addr=<IP address> --fw=<firmware path> --fpga=<FPGA path>
+
+**Note:**
+Different hardware revisions require different FPGA images.
+Determine the revision number from the sticker on the rear of the chassis.
+Use this number to select the correct FPGA image for your device.
 
-    cd <install-path>/share/uhd/utils
-    ./usrp_n2xx_net_burner.py --addr=<ip address> --fw=<path for firmware image>
-    ./usrp_n2xx_net_burner.py --addr=<ip address> --fpga=<path to FPGA image>
+For users who would prefer a graphical utility, a Python-based alternative exists.
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Use the net burner tool (Windows)
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Use the graphical net burner tool (Linux)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 ::
 
-    <path_to_python.exe> <install-path>/share/uhd/utils/usrp_n2xx_net_burner_gui.py
+    <install-path>/lib/uhd/utils/usrp_n2xx_net_burner_gui.py
 
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Burning images without Python
-^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-
-For users who do not wish to install Python, a new script is available in UHD 003.005.000:
-the USRP N2XX Simple Net Burner. It provides the same functionality as its Python
-counterpart, but by default, it automatically installs the default images without the user needing
-to specify their location on the command line.
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Use the graphical net burner tool (Windows)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+::
 
-The utility can be found at: **<install-path>/share/uhd/utils/usrp_n2xx_simple_net_burner**
+    <path_to_python.exe> <install-path>/lib/uhd/utils/usrp_n2xx_net_burner_gui.py
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Device recovery and bricking
@@ -190,7 +191,7 @@ and the network must be setup properly as described above.
 Run the following commands:
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     ./usrp_burn_mb_eeprom --args=<optional device args> --key=ip-addr --val=192.168.10.3
 
 **Method 2 (Linux Only):**
@@ -199,7 +200,7 @@ It uses raw Ethernet packets to bypass the IP/UDP layer to communicate with the
 Run the following commands:
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     sudo ./usrp2_recovery.py --ifc=eth0 --new-ip=192.168.10.3
 
 ------------------------------------------------------------------------
@@ -271,11 +272,11 @@ Addressing the Device
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Single device configuration
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-In a single-device configuration,
-the USRP device must have a unique IPv4 address on the host computer.
-The USRP can be identified through its IPv4 address, resolvable hostname, or by other means.
-See the application notes on `device identification <./identification.html>`_.
-Use this addressing scheme with the **single_usrp** interface.
+In a single-device configuration, the USRP device must have a unique IPv4
+address on the host computer.  The USRP can be identified through its IPv4
+address, resolvable hostname, or by other means.  See the application notes on
+`device identification <./identification.html>`_.  Please note that this
+addressing scheme should also be used with the **multi_usrp** interface.
 
 Example device address string representation for a USRP2 with IPv4 address **192.168.10.2**:
 
@@ -313,7 +314,7 @@ This device will be referred to as the slave, and the other device, the master.
 * External clocking is optional and should only be supplied to the master device.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Shared ethernet mode
+Shared Ethernet mode
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 In shared Ethernet mode,
 only one device in the configuration can be attached to the Ethernet.
@@ -322,7 +323,7 @@ only one device in the configuration can be attached to the Ethernet.
 * Master and slave must have different IPv4 addresses in the same subnet.
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Dual ethernet mode
+Dual Ethernet mode
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 In dual Ethernet mode,
 both devices in the configuration must be attached to the Ethernet.
@@ -358,7 +359,7 @@ have been programmed into the device's EEPROM.
 Run the following commands:
 ::
 
-    cd <install-path>/share/uhd/utils
+    cd <install-path>/lib/uhd/utils
     ./usrp_burn_mb_eeprom --args=<optional device args> --key=subnet --val=255.255.255.0
     ./usrp_burn_mb_eeprom --args=<optional device args> --key=gateway --val=192.168.10.1
 
@@ -400,7 +401,7 @@ The LEDs on the front panel can be useful in debugging hardware and software iss
 The LEDs reveal the following about the state of the device:
 
 * **LED A:** transmitting
-* **LED B:** mimo cable link
+* **LED B:** MIMO cable link
 * **LED C:** receiving
 * **LED D:** firmware loaded
 * **LED E:** reference lock
@@ -408,13 +409,13 @@ The LEDs reveal the following about the state of the device:
 
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Ref Clock - 10MHz
+Ref Clock - 10 MHz
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Using an external 10MHz reference clock, a square wave will offer the best phase
+Using an external 10 MHz reference clock, a square wave will offer the best phase
 noise performance, but a sinusoid is acceptable.  The reference clock requires the following power level:
 
-* **USRP2** 5 to 15dBm
-* **N2XX** 0 to 15dBm
+* **USRP2** 5 to 15 dBm
+* **N2XX** 0 to 15 dBm
 
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -431,7 +432,7 @@ Test the PPS input with the following app:
 
 ::
 
-    cd <install-path>/share/uhd/examples
+    cd <install-path>/lib/uhd/examples
     ./test_pps_input --args=<args>
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -466,7 +467,9 @@ which has been aptly named slot **A**.
 
 In the following example, a TVRX2 is installed.
 Channel 0 is sourced from subdevice **RX1**,
-and channel 1 is sourced from subdevice **RX2**:
+and channel 1 is sourced from subdevice **RX2** (**RX1** and **RX2**
+are the antenna ports on the TVRX2 daughterboard):
+
 ::
 
     usrp->set_rx_subdev_spec("A:RX1 A:RX2");
diff --git a/host/docs/usrp2_card_burner.1 b/host/docs/usrp2_card_burner.1
index d6a12b073..b6e1954d8 100644
--- a/host/docs/usrp2_card_burner.1
+++ b/host/docs/usrp2_card_burner.1
@@ -1,4 +1,4 @@
-.TH "usrp2_card_burner" 1 "3.5.1" UHD "User Commands"
+.TH "usrp2_card_burner" 1 "3.7.0" UHD "User Commands"
 .SH NAME
 usrp2_card_burner - USRP N-Series FPGA/Firmware Burner
 .SH DESCRIPTION
@@ -34,12 +34,12 @@ GR-UHD documentation:
 .LP
 Other UHD programs:
 .sp
-uhd_images_downloader(1) usrp_n2xx_simple_net_burner(1)
+uhd_images_downloader(1) usrp_n2xx_simple_net_burner(1) usrp_x3xx_fpga_burner(1)
 .SH AUTHOR
 This manual page was written by Nicholas Corgan
 for the Debian project (but may be used by others).
 .SH COPYRIGHT
-Copyright (c) 2012 Ettus Research LLC
+Copyright (c) 2012,2014 Ettus Research LLC
 .LP
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/host/docs/usrp_b100.rst b/host/docs/usrp_b100.rst
index ac0942f5c..223ad5a90 100644
--- a/host/docs/usrp_b100.rst
+++ b/host/docs/usrp_b100.rst
@@ -1,5 +1,5 @@
 ========================================================================
-UHD - USRP-B100 Series Application Notes
+UHD - USRP-B100 Series Device Manual
 ========================================================================
 
 .. contents:: Table of Contents
@@ -8,15 +8,21 @@ UHD - USRP-B100 Series Application Notes
 Comparative features list
 ------------------------------------------------------------------------
 
-* 1 transceiver card slot
-* 1 RX DDC chain in FPGA
-* 1 TX DUC chain in FPGA
-* Timed commands in FPGA
-* Timed sampling in FPGA
-* External PPS reference
-* External 10MHz reference
-* Configurable clock rate (defaults 64 MHz)
-* sc8 and sc16 sample modes
+**Hardware Capabilities:**
+ * 1 transceiver card slot
+ * External PPS reference input
+ * External 10 MHz reference input
+ * Configurable clock rate (defaults 64 MHz)
+
+**FPGA Capabilities:**
+ * 1 RX DDC chain in FPGA
+ * 1 TX DUC chain in FPGA
+ * Timed commands in FPGA
+ * Timed sampling in FPGA
+ * sc8 and sc16 sample modes
+
+   * Up to 8 MHz of RF BW with 16-bit samples
+   * Up to 16 MHz of RF BW with 8-bit samples
 
 ------------------------------------------------------------------------
 Specify a Non-standard Image
@@ -38,17 +44,17 @@ Example device address string representations to specify non-standard images:
 Changing the Master Clock Rate
 ------------------------------------------------------------------------
 The master clock rate of the B100 feeds both the FPGA DSP and the codec chip.
-Hundreds of rates between 32MHz and 64MHz are available.
+Hundreds of rates between 32 MHz and 64 MHz are available.
 A few notable rates are:
 
-* **64MHz:** maximum rate of the codec chip
-* **61.44MHz:** good for UMTS/WCDMA applications
-* **52Mhz:** good for GSM applications
+* **64 MHz:** maximum rate of the codec chip
+* **61.44 MHz:** good for UMTS/WCDMA applications
+* **52 MHz:** good for GSM applications
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-Set 61.44MHz - uses external VCXO
+Set 61.44 MHz - uses external VCXO
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-To use the 61.44MHz clock rate, the USRP embedded will require one jumper to be moved,
+To use the 61.44 MHz clock rate, the USRP embedded will require one jumper to be moved,
 and X4 must be populated with a 61.44 MHz oscillator.
 
 * **J15** is a three pin header, move the jumper to (pin1, pin2)
@@ -64,7 +70,7 @@ To use other clock rates, the jumper will need to be in the default position.
 * **J15** is a three pin header, move the jumper to (pin2, pin3)
 
 To communicate the desired clock rate into UHD software,
-specify the a special device address argument,
+specify the special device address argument,
 where the key is **master_clock_rate** and the value is a rate in Hz.
 Example:
 ::
@@ -82,9 +88,9 @@ The LEDs on the front panel can be useful in debugging hardware and software iss
 The LEDs reveal the following about the state of the device:
 
 * **LED A:** transmitting
-* **LED B:** fpga loaded
+* **LED B:** FPGA loaded
 * **LED C:** receiving
-* **LED D:** fpga loaded
+* **LED D:** FPGA loaded
 * **LED E:** reference lock
 * **LED F:** board power
 
diff --git a/host/docs/usrp_b200.rst b/host/docs/usrp_b200.rst
index 81e66684e..b282ec424 100644
--- a/host/docs/usrp_b200.rst
+++ b/host/docs/usrp_b200.rst
@@ -1,5 +1,5 @@
 ========================================================================
-UHD - USRP-B2X0 Series Application Notes
+UHD - USRP-B2x0 Series Device Manual
 ========================================================================
 
 .. contents:: Table of Contents
@@ -8,35 +8,26 @@ UHD - USRP-B2X0 Series Application Notes
 Comparative features list - B200
 ------------------------------------------------------------------------
 
-* integrated RF frontend (RF coverage from 70 MHz - 6 GHz)
-* 1 RX DDC chain in FPGA
-* 1 TX DUC chain in FPGA
-* Timed commands in FPGA
-* Timed sampling in FPGA
-* External PPS reference
-* External 10MHz reference
-* Configurable clock rate
-* Internal GPSDO option
+**Hardware Capabilities:**
+ * Integrated RF frontend (70 MHz - 6 GHz)
+ * External PPS reference input
+ * External 10 MHz reference input
+ * Configurable clock rate
+ * Internal GPSDO option
+ * B210 Only:
 
-------------------------------------------------------------------------
-Comparative features list - B210
-------------------------------------------------------------------------
+   * MICTOR Debug Connector
+   * JTAG Connector
 
-* integrated MIMO frontend (RF coverage from 70 MHz - 6 GHz)
-* 2 RX DDC chains in FPGA
-* 2 TX DUC chains in FPGA
-* Timed commands in FPGA
-* Timed sampling in FPGA
-* External PPS reference
-* External 10MHz reference
-* Configurable clock rate
-* Internal GPSDO option
+**FPGA Capabilities:**
+ * Timed commands in FPGA
+ * Timed sampling in FPGA
 
 ------------------------------------------------------------------------
 Specify a Non-standard Image
 ------------------------------------------------------------------------
 UHD software will automatically select the USRP B2X0 images from the installed images package.
-The image selection can be overridden with the **--fpga=** and **--fw=** device address parameters.
+The image selection can be overridden with the **fpga** and **fw** device address parameters.
 
 Example device address string representations to specify non-standard images:
 
@@ -81,7 +72,7 @@ Frontend gain
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 All frontends have individual analog gain controls.
 The receive frontends have 73 dB of available gain;
-and the transmit frontends have 89 dB of available gain.
+and the transmit frontends have 89.5 dB of available gain.
 Gain settings are application specific,
-but its recommended that users consider using at least
+but it is recommended that users consider using at least
 half of the available gain to get reasonable dynamic range.
diff --git a/host/docs/usrp_e1x0.rst b/host/docs/usrp_e1x0.rst
index fc929e639..ea2d05a3c 100644
--- a/host/docs/usrp_e1x0.rst
+++ b/host/docs/usrp_e1x0.rst
@@ -1,5 +1,5 @@
 ========================================================================
-UHD - USRP-E1X0 Series Application Notes
+UHD - USRP-E1x0 Series Device Manual
 ========================================================================
 
 .. contents:: Table of Contents
@@ -8,23 +8,29 @@ UHD - USRP-E1X0 Series Application Notes
 Comparative features list
 ------------------------------------------------------------------------
 
-* 1 transceiver card slot
-* 2 RX DDC chains in FPGA
-* 1 TX DUC chain in FPGA
-* Timed commands in FPGA
-* Timed sampling in FPGA
-* Internal PPS reference
-* Internal 10MHz reference
-* Configurable clock rate (defaults 64 MHz)
-* Internal GPSDO option
-* sc8 and sc16 sample modes
+**Hardware Capabilities:**
+ * 1 transceiver card slot
+ * Internal PPS reference input
+ * Internal 10 MHz reference input
+ * Configurable clock rate (defaults to 64 MHz)
+ * Internal GPSDO option
+
+**FPGA Capabilities:**
+ * 2 RX DDC chains in FPGA
+ * 1 TX DUC chain in FPGA
+ * Timed commands in FPGA
+ * Timed sampling in FPGA
+ * sc8 and sc16 sample modes
+
+   * Up to 8 MHz of RF BW with 16-bit samples
+   * Up to 16 MHz of RF BW with 8-bit samples
 
 ------------------------------------------------------------------------
 Specify a Non-standard Image
 ------------------------------------------------------------------------
 UHD software will automatically select the USRP-Embedded FPGA image from the
 installed images package.  The FPGA image selection can be overridden with the
-**--fpga=** device address parameter.
+**fpga** device address parameter.
 
 Example device address string representations to specify non-standard FPGA
 image:
@@ -37,17 +43,17 @@ image:
 Changing the Master Clock Rate
 ------------------------------------------------------------------------
 The master clock rate of the USRP-Embedded feeds both the FPGA DSP and the codec
-chip.  Hundreds of rates between 32MHz and 64MHz are available.  A few notable
+chip.  Hundreds of rates between 32 MHz and 64 MHz are available.  A few notable
 rates are:
 
-* **64MHz:** maximum rate of the codec chip
-* **61.44MHz:** good for UMTS/WCDMA applications
-* **52Mhz:** good for GSM applications
+* **64 MHz:** maximum rate of the codec chip
+* **61.44 MHz:** good for UMTS/WCDMA applications
+* **52 MHz:** good for GSM applications
 
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Set 61.44MHz - uses external VCXO
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-To use the 61.44MHz clock rate with the USRP-Embedded, two jumpers must be moved
+To use the 61.44 MHz clock rate with the USRP-Embedded, two jumpers must be moved
 on the device.
 
 * **J16** is a two pin header; remove the jumper (or leave it on pin1 only).
@@ -94,22 +100,22 @@ a connector.
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 PPS - Pulse Per Second
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-An exteral PPS signal for timestamp synchronization can be supplied by soldering
+An external PPS signal for timestamp synchronization can be supplied by soldering
 a connector.
 
 * Connector **J13** (PPS) needs MCX connector **WM5541-ND** or similar.
 * Requires a square wave signal.
-* **Amplitude:** 3.3 to 5Vpp
+* **Amplitude:** 3.3 to 5 Vpp
 
-Test the PPS input with the following app:
-
-* **<args** are device address arguments (optional if only one USRP device is on your machine).
+Test the PPS input with the following app (**<args>** are device address
+arguments, optional if only one USRP device is on your machine):
 
 ::
 
-    cd <install-path>/share/uhd/examples
+    cd <install-path>/lib/uhd/examples
     ./test_pps_input --args=<args>
 
+
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Internal GPSDO
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -117,7 +123,7 @@ Please see the `Internal GPSDO Application Notes <./gpsdo.html>`_
 for information on configuring and using the internal GPSDO.
 
 UHD software will always try to detect an installed GPSDO at runtime.
-There is not a special EEPROM value to burn for GPSDO detection.
+It is not necessary to burn a special EEPROM value for GPSDO detection.
 
 ------------------------------------------------------------------------
 Hardware Setup Notes
@@ -132,7 +138,7 @@ issues.  The LEDs reveal the following about the state of the device:
 * **LED A:** transmitting
 * **LED B:** PPS signal
 * **LED C:** receiving
-* **LED D:** fpga loaded
+* **LED D:** FPGA loaded
 * **LED E:** reference lock
 * **LED F:** board power
 
diff --git a/host/docs/usrp_n2xx_simple_net_burner.1 b/host/docs/usrp_n2xx_simple_net_burner.1
index 6e8e38fae..8df38b7bd 100644
--- a/host/docs/usrp_n2xx_simple_net_burner.1
+++ b/host/docs/usrp_n2xx_simple_net_burner.1
@@ -1,4 +1,4 @@
-.TH "usrp_n2xx_simple_net_burner" 1 "3.5.1" UHD "User Commands"
+.TH "usrp_n2xx_simple_net_burner" 1 "3.7.0" UHD "User Commands"
 .SH NAME
 usrp_n2xx_simple_net_burner - USRP N-Series FPGA/Firmware Burner
 .SH DESCRIPTION
@@ -41,12 +41,12 @@ GR-UHD documentation:
 .LP
 Other UHD programs:
 .sp
-uhd_images_downloader(1) usrp2_card_burner(1)
+uhd_images_downloader(1) usrp2_card_burner(1) usrp_x3xx_fpga_burner(1)
 .SH AUTHOR
 This manual page was written by Nicholas Corgan
 for the Debian project (but may be used by others).
 .SH COPYRIGHT
-Copyright (c) 2012 Ettus Research LLC
+Copyright (c) 2012,2014 Ettus Research LLC
 .LP
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/host/docs/usrp_x3x0.rst b/host/docs/usrp_x3x0.rst
new file mode 100644
index 000000000..058230b5a
--- /dev/null
+++ b/host/docs/usrp_x3x0.rst
@@ -0,0 +1,688 @@
+===============================
+UHD - X3x0 Series Device Manual
+===============================
+
+.. contents:: Table of Contents
+
+-------------------------
+Comparative features list
+-------------------------
+
+**Hardware Capabilities:**
+ * 2 transceiver card slots
+ * Dual SFP+ Transceivers (can be used with 1 GigE, 10 GigE)
+ * PCI Express over cable (MXI) gen1 x4
+ * External PPS input & output
+ * External 10 MHz input & output
+ * Expandable via 2nd SFP+ interface
+ * Supported master clock rates: 200 MHz, 184.32 MHz
+ * External GPIO Connector with UHD API control
+ * External USB Connection for built-in JTAG debugger
+ * Internal GPSDO option
+ * Kintex-7 FPGA (X310: XC7K410T, X300: XC7K325T)
+
+**FPGA Capabilities:**
+ * 2 RX DDC chains in FPGA
+ * 2 TX DUC chain in FPGA
+ * Timed commands in FPGA
+ * Timed sampling in FPGA
+ * 16-bit and 8-bit sample modes (sc8 and sc16)
+ * Up to 120 MHz of RF bandwidth with 16-bit samples
+
+--------------
+Hardware Setup
+--------------
+
+^^^^^^^^^^^^^^^^^^^^^^^^^
+Gigabit Ethernet (1 GigE)
+^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Installing the USRP X300/X310
+:::::::::::::::::::::::::::::
+* Prior to installing the module, the host PC can remain powered on.
+* Plug a 1 Gigabit SFP+ Transceiver into Ethernet Port 0 on the USRP X300/x310 device.
+* Use the Ethernet cable to connect the SFP+ transciever on the device to the host computer. For maximum throughput, Ettus Research recommends that you connect each device to its own dedicated Gigabit Ethernet interface on the host computer.
+* Connect the AC/DC power supply to the device and plug the supply into a wall outlet.
+* The OS will automatically recognize the device (e.g. when running uhd_find_devices).
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Ten Gigabit Ethernet (10 GigE)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Installing the Host Ethernet Interface
+::::::::::::::::::::::::::::::::::::::
+Ettus Research recommends the Intel Ethernet Converged Network Adapter X520-DA2 interface for communication with the USRP X300/X310 device.
+Installation instructions for this interface are available on the official Intel website.
+
+Installing the USRP X300/X310
+:::::::::::::::::::::::::::::
+* Prior to installing the module, the host PC can remain powered on.
+* Use a 10 Gigabit SFP+ cable to connect Ethernet Port 1 on the USRP X300/X310 device to the host computer. For maximum throughput, Ettus Research recommends that you connect the device to its own dedicated Ten Gigabit, Ettus Research recommended Ethernet interface on the host computer.
+* Connect the AC/DC power supply to the device and plug the supply into a wall outlet.
+* The OS will automatically recognize the device (e.g. when running uhd_find_devices).
+
+The LEDs on the front panel can be useful in debugging hardware and software issues (see Section "Front Panel")
+
+^^^^^^^^^^^^^^^^^^^^^
+PCI Express (Desktop)
+^^^^^^^^^^^^^^^^^^^^^
+*Important Note: The USRP X-Series provides PCIe connectivity over MXI cable.
+We will use the 'MXI' nomenclature for the rest of this manual.*
+
+Installing the PCI Express Interface Kit
+::::::::::::::::::::::::::::::::::::::::
+Follow the instructions listed in the `Set Up Your MXI-Express x4 System <http://www.ni.com/pdf/manuals/371976c.pdf>`_ 
+document to setup the NI PCIe-8371 module.
+
+Installing the USRP X300/X310
+:::::::::::::::::::::::::::::
+* Prior to installing the module, make sure that the PC is powered off.
+* Using a MXI-Express Cable connect the USRP X300/X310 to the NI PCIe-8371.
+* Connect the AC/DC power supply to the device and plug the supply into a wall outlet.
+* Power on the USRP X300/X310 device using the power switch located in the bottom-right corner of the front panel.
+* Power on the PC (The OS automatically recognizes the new device)
+
+NOTE: The USRP device is not hot-pluggable over PCI Express. Any connection changes with only be detected by your 
+computer after a successful reboot.
+
+Troubleshooting
+:::::::::::::::
+Two possible failure modes are your computer not booting when connected to your
+USRP device through MXI-Express, and Windows not properly discovering your
+devices (for example, there is a yellow exclamation point on a PCI to PCI
+bridge in Windows Device Manager, despite drivers for all devices being
+installed). These situations often are due to programming errors in PCI Express
+device configuration of the BIOS. To use this software, you need a MXI-Express
+device that supports Mode 1 operation. 
+Refer to `NI MXI-Express BIOS Compatibility Software Readme <http://download.ni.com/support/softlib//PXI/MXIe%20Compatibility%20Software/1.5.0/readme.html#SupportedHardware>`_ 
+for more information.
+
+The BIOS Compatibility Software can be downloaded for Windows from the `MXI-Express BIOS Compatibility Software <http://www.ni.com/download/mxi-express-bios-compatibility-software-1.5/3764/en/>`_ page
+
+^^^^^^^^^^^^^^^^^^^^
+PCI Express (Laptop)
+^^^^^^^^^^^^^^^^^^^^
+*Important Note: The USRP X-Series provides PCIe connectivity over MXI cable.
+We will use the 'MXI' nomenclature for the rest of this manual.*
+
+Installing the PCI Express Card
+:::::::::::::::::::::::::::::::
+Follow the instructions listed in the “Installing an NI ExpressCard-8360 Host Card� section of the 
+`Set Up Your MXI-Express x1 System <http://www.ni.com/pdf/manuals/373259d.pdf#page=10>`_ 
+document to setup the NI ExpressCard-8360B module.
+
+Installing the USRP X300/X310
+:::::::::::::::::::::::::::::
+Because a laptop computer is not grounded, follow this procedure to safely connect a laptop
+computer to your USRP device.
+
+* Connect the AC/DC power supply to the device and plug the supply into a wall outlet. Ensure that the USRP device is powered off.
+* Touch the NI ExpressCard-8360B and a metal part of the USRP device simultaneously. Do not install the NI ExpressCard-8360B into the laptop computer yet.
+* Connect the cable to the NI ExpressCard-8360B and USRP.
+* Plug the NI ExpressCard-8360B into an available ExpressCard slot. If your laptop computer is already running (or hibernating, suspended, etc) when you install an NI ExpressCard-8360B, you must reboot to detect the USRP. Otherwise, the USRP is detected when you start your computer.
+
+NOTE: The USRP device is not hot-pluggable over PCI Express. Any connection changes will only be detected by your computer after a successful reboot.
+
+--------------------------------
+On-Board JTAG Programmer
+--------------------------------
+The USRP X3x0 includes an on-board JTAG programmer, built into the motherboard.
+To connect to this JTAG device, simply connect your computer to the USB JTAG
+port on the front of the X3x0 device. You may now use the JTAG programmer in
+the same way you would use any other, including:
+
+* `Xilinx Programming Tools (ISE, iMPACT) <http://www.xilinx.com/support/download/index.htm>`_
+* `Xilinx Chipscope <http://www.xilinx.com/tools/cspro.htm>`_
+* `Digilent ADEPT <https://www.digilentinc.com/Products/Detail.cfm?NavPath=2,66,828&Prod=ADEPT2>`_
+
+In order to use the JTAG programmer with the Xilinx tools, the Digilent drivers and plugin have to be installed first.
+Although recent versions of ISE ship with the driver, it has to still be manually installed.
+
+Note: Sometimes the ISE shipped versions are newer than the ones available via Digilent's website. It is therefore advisable to
+use the ISE provided plugin and drivers.
+
+To install first locate your ISE installation path (default is /opt/Xilinx/<Version>).
+
+**LINUX**
+::
+
+    sudo <ise install path>/ISE_DS/common/bin/lin64/digilent/install_digilent.sh
+
+Afterwards either reboot or force udev to reload its rules by:
+::
+
+    sudo udevadm control --reload
+
+The USRP-X series device should now be usable with all the tools mentioned above.
+
+--------------------------------
+Load FPGA Images onto the Device
+--------------------------------
+The USRP-X Series device ships with a bitstream pre-programmed in the flash,
+which is automatically loaded onto the FPGA during device power-up. However,
+a new FPGA image can be configured over the PCI Express interface or the
+on-board USB-JTAG programmer. This process can be seen as a "one-time load", in
+that if you power-cycle the device, it will not retain the FPGA image.
+
+Please note that this process is *different* than replacing the FPGA image
+stored in the flash, which will then be automatically loaded the next time the
+device is reset.
+
+^^^^^^^^^^^^^^^^^^
+FPGA Image Flavors
+^^^^^^^^^^^^^^^^^^
+The USRP-X Series devices contains two SFP+ ports for the two Ethernet channels.
+Because the SFP+ ports support both 1 Gigabit (SFP) and 10 Gigabit (SFP+)
+transceivers, several FPGA images are shipped with UHD to determine the
+behavior of the above interfaces.
+
++---------------------+------------------------+------------------------+
+|  FPGA Image Flavor  |  SFP+ Port 0 Interface |  SFP+ Port 1 Interface |
++=====================+========================+========================+
+|  HGS (Default)      |  1 Gigabit Ethernet    |  10 Gigabit Ethernet   |
++---------------------+------------------------+------------------------+
+|  XGS                |  10 Gigabit Ethernet   |  10 Gigabit Ethernet   |
++---------------------+------------------------+------------------------+
+
+FPGA images are shipped in 2 formats:
+
+* **LVBITX**: LabVIEW FPGA configuration bitstream format (for use over PCI Express and Ethernet)
+* **BIT**: Xilinx configuration bitstream format (for use over Ethernet and JTAG)
+
+To get the latest images, simply use the uhd_images_downloader script:
+
+**UNIX:**
+
+::
+
+    uhd_images_downloader
+
+**Windows:**
+
+::
+
+    <path_to_python.exe> <install-path>/bin/uhd_images_downloader.py
+
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Use PCI Express to load FPGA images
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+UHD requires a valid LabVIEW FPGA configuration bitstream file (LVBITX) to use the USRP-X Series
+device over the PCI Express bus. LabVIEW FPGA is **NOT** required to use UHD with a USRP-X Series device.
+Because FPGA configuration is a part of normal operation over PCI Express, there is no setup required
+before running UHD.
+
+The **fpga** tag can be set in the optional device args passed to indicate the FPGA image flavor to UHD.
+If the above tag is specified, UHD will attempt to load the FPGA image with the requested flavor from the
+UHD images directory. If the tag is not specified, UHD will automatically detect the flavor of the image
+and attempt to load the corresponding configuration bitstream onto the device. Note that if UHD detects
+that the requested image is already loaded onto the FPGA then it will not reload it. 
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Use JTAG to load FPGA images
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+The USRP-X Series device features an on-board USB-JTAG programmer that can be accessed on the front-panel
+of the device. The iMPACT tool in the `Xilinx Programming Tools <http://www.xilinx.com/support/download/index.htm>`_ package can be used to load an image over
+the JTAG interface.
+
+---------------------------------------
+Load the Images onto the On-board Flash
+---------------------------------------
+To change the FPGA image stored in the on-board flash, the USRP-X Series device
+can be reprogrammed over the network or PCI Express. Once you have programmed an
+image into the flash, that image will be automatically loaded on the FPGA
+during the device boot-up sequence.
+
+**Note:**
+Different hardware revisions require different FPGA images.
+Determine the revision number from the sticker on the rear of the device.
+If you are manually specifying an FPGA path, the utility will not try to
+detect your device information, and you will need to use this number to
+select which image to burn.
+
+**Note:**
+The burner utility will default to using the appropriate BIT file if no custom
+FPGA image path is specified, but it is compatible with BIN, BIT, and LVBITX
+images.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Use the burner tool over Ethernet
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+::
+
+    Automatic FPGA path, detect image type:
+    usrp_x3xx_fpga_burner --addr=<IP address>
+
+    Automatic FPGA path, select image type:
+    usrp_x3xx_fpga_burner --addr=<IP address> --type=<HGS or XGS>
+
+    Manual FPGA path:
+    usrp_x3xx_fpga_burner --addr=<IP address> --fpga-path=<path to FPGA image>
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Use the burner tool over PCI Express
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+::
+
+    Automatic FPGA path, detect image type:
+    usrp_x3xx_fpga_burner --resource=<NI-RIO resource>
+
+    Automatic FPGA path, select image type:
+    usrp_x3xx_fpga_burner --resource=<NI-RIO resource> --type=<HGS or XGS>
+
+    Manual FPGA path:
+    usrp_x3xx_fpga_burner --resource=<NI-RIO resource> --fpga-path=<path to FPGA image>
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Device recovery and bricking
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+It is possible to put the device into an unusable state by loading bad images.
+Fortunately, the USRP-X Series device can be loaded with a good image temporarily using the USB-JTAG interface. 
+Once booted into the safe image, the user can once again load images onto the device over Ethernet or PCI Express.
+
+----------------
+Setup Networking
+----------------
+The USRP-X Series only supports Gigabit and Ten Gigabit Ethernet and will not work with a 10/100 Mbps interface.
+
+**Please note that 10 Gigabit Ethernet defines the protocol, not necessary the
+medium. For example, you may use 10GigE over optical with optical SFP+
+transceiver modules.**
+
+^^^^^^^^^^^^^^^^^^^^^^^^
+Setup the host interface
+^^^^^^^^^^^^^^^^^^^^^^^^
+The USRP-X Series communicates at the IP/UDP layer over the Gigabit and Ten Gigabit Ethernet.
+The default IP address for the USRP X300/X310 device depends on the Ethernet Port and interface used. 
+You must configure the host Ethernet interface with a static IP address on the same subnet as the connected 
+device to enable communication, as shown in the following table:
+
++---------------+-------------------------+----------------+----------------+---------------+
+|  Ethernet     | USRP                    |  Default USRP  |  Host Static   | Host Static   |
+| Interface     | Ethernet Port           | IP Address     | IP Address     | Subnet Mask   |
++===============+=========================+================+================+===============+
+|  Gigabit      |  Port 0 (HGS Image)     |  192.168.10.2  | 192.168.10.1   | 255.255.255.0 |
++---------------+-------------------------+----------------+----------------+---------------+
+|  Ten Gigabit  |  Port 1 (HGS/XGS Image) |  192.168.40.2  | 192.168.40.1   | 255.255.255.0 |
++---------------+-------------------------+----------------+----------------+---------------+
+|  Ten Gigabit  |  Port 0 (XGS Image)     |  192.168.30.2  | 192.168.30.1   | 255.255.255.0 |
++---------------+-------------------------+----------------+----------------+---------------+
+
+
+On a Linux system, you can add a static IP address very easily by using the
+'ip' command
+
+::
+
+    sudo ip addr add 192.168.10.1/24 dev <interface>
+
+Note that **<interface>** is usually something like **eth0**.  You can discover the
+names of the network interfaces in your computer by running:
+
+::
+
+    ip addr show
+
+**Note:**
+When using UHD software, if an IP address for the USRP-X Series device is not specified,
+the software will use UDP broadcast packets to locate the USRP-X Series device.
+On some systems, the firewall will block UDP broadcast packets.
+It is recommended that you change or disable your firewall settings.
+
+On many Linux distributions, NetworkManager or similar tools may control the network interface.
+It is important to deactivate these tools for your device before continuing!
+
+^^^^^^^^^^^^^^^
+Setting the MTU
+^^^^^^^^^^^^^^^
+As UHD by default uses receive and transmit frames larger than the standard MTU of 1500 Bytes,
+the NIC needs to be configured to use a larger MTU when used with the USRP X series devices.
+
+::
+
+    sudo ip link set mtu 8192 dev <interface>
+
+Upon initialization UHD will probe for the maximum possible path MTU along the path between the USRP X series device
+and the host, both in receive and transmit direction.
+
+If the network hardware does not support MTUs as large as 8000 Bytes, passing the **send_frame_size** and **receive_frame_size**
+arguments will make UHD use smaller MTUs:
+
+::
+
+    uhd_usrp_probe --args='send_frame_size=<max send MTU>, recv_frame_size=<max receive MTU>'
+
+**Note:** This will most likely have a severe performance penalty.
+
+
+^^^^^^^^^^^^^^^^^^^^^^^^^
+Multiple devices per host
+^^^^^^^^^^^^^^^^^^^^^^^^^
+For maximum throughput, one Ethernet interface per USRP is recommended,
+although multiple devices may be connected via an Ethernet switch.
+In any case, each Ethernet interface should have its own subnet,
+and the corresponding USRP device should be assigned an address in that subnet.
+Example:
+
+**Configuration for USRP-X Series device 0:**
+
+* Ethernet interface IPv4 address: **192.168.10.1**
+* Ethernet interface subnet mask: **255.255.255.0**
+* USRP-X Series device IPv4 address: **192.168.10.2**
+
+**Configuration for USRP-X Series device 1:**
+
+* Ethernet interface IPv4 address: **192.168.110.1**
+* Ethernet interface subnet mask: **255.255.255.0**
+* USRP-X Series device IPv4 address: **192.168.110.2**
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Change the USRP's IP address
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+You may need to change the USRP's IP address for several reasons:
+
+* to satisfy your particular network configuration
+* to use multiple USRP-X Series devices on the same host computer
+* to set a known IP address into USRP (in case you forgot)
+
+To change the USRP's IP address,
+you must know the current address of the USRP,
+and the network must be setup properly as described above.
+Run the following commands:
+
+**UNIX:**
+
+::
+
+    cd <install-path>/lib/uhd/utils
+    ./usrp_burn_mb_eeprom --args=<optional device args> --key=ip-addr --val=192.168.10.3
+
+**Windows:**
+
+::
+
+    cd <install-path>\lib\uhd\utils
+    usrp_burn_mb_eeprom.exe --args=<optional device args> --key=ip-addr --val=192.168.10.3
+
+---------------------
+Addressing the Device
+---------------------
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Single device configuration
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+In a single-device configuration,
+the USRP device must have a unique IPv4 address on the host computer.
+The USRP can be identified through its IPv4 address, resolvable hostname, NI-RIO resource name or by other means.
+See the application notes on `device identification <./identification.html>`_.
+Use this addressing scheme with the **multi_usrp** interface (not a typo!).
+
+Example device address string representation for a USRP-X Series device with IPv4 address **192.168.10.2**:
+
+::
+
+    addr=192.168.10.2
+
+Example device address string representation for a USRP-X Series device with RIO resource name **RIO0** over PCI Express:
+
+::
+
+    resource=RIO0
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Multiple device configuration
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+In a multi-device configuration,
+each USRP device must have a unique IPv4 address on the host computer.
+The device address parameter keys must be suffixed with the device index.
+Each parameter key should be of the format <key><index>.
+Use this addressing scheme with the **multi_usrp** interface.
+
+* The order in which devices are indexed corresponds to the indexing of the transmit and receive channels.
+* The key indexing provides the same granularity of device identification as in the single device case.
+
+Example device address string representation for 2 USRPs with IPv4 addresses **192.168.10.2** and **192.168.20.2**:
+
+::
+
+    addr0=192.168.10.2, addr1=192.168.20.2
+
+
+----------------------
+Communication Problems
+----------------------
+When setting up a development machine for the first time,
+you may have various difficulties communicating with the USRP device.
+The following tips are designed to help narrow down and diagnose the problem.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+RuntimeError: no control response
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+This is a common error that occurs when you have set the subnet of your network
+interface to a different subnet than the network interface of the USRP device.  For
+example, if your network interface is set to **192.168.20.1**, and the USRP device is
+**192.168.10.2** (note the difference in the third numbers of the IP addresses), you
+will likely see a 'no control response' error message.
+
+Fixing this is simple - just set the your host PC's IP address to the same
+subnet as that of your USRP device. Instructions for setting your IP address are in the
+previous section of this documentation.
+
+^^^^^^^^^^^^^^^
+Firewall issues
+^^^^^^^^^^^^^^^
+When the IP address is not specified,
+the device discovery broadcasts UDP packets from each Ethernet interface.
+Many firewalls will block the replies to these broadcast packets.
+If disabling your system's firewall
+or specifying the IP address yields a discovered device,
+then your firewall may be blocking replies to UDP broadcast packets.
+If this is the case, we recommend that you disable the firewall
+or create a rule to allow all incoming packets with UDP source port **49152**.
+
+^^^^^^^^^^^^^^^
+Ping the device
+^^^^^^^^^^^^^^^
+The USRP device will reply to ICMP echo requests ("ping").
+A successful ping response means that the device has booted properly
+and that it is using the expected IP address.
+
+::
+
+    ping 192.168.10.2
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+USRP device not enumerated (Linux)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+UHD requires the RIO device manager service to be running in order to
+communicate with an X-Series USRP over PCIe.  This service is installed as
+a part of the USRP RIO (or NI-USRP) installer. On Linux, the service is not
+started at system boot time, and is left to the user to control. To start it,
+run the following command:
+
+::
+
+    sudo niusrprio_pcie start
+
+If the device still does not enumerate after starting the device manager, make sure that the host computer
+has successfully detected it. You can do so by running the following command:
+
+::
+
+   lspci -k -d 1093:c4c4
+
+A device similar to the following should be detected:
+
+::
+
+   $ lspci -k -d 1093:c4c4
+   04:00.0 Signal processing controller: National Instruments ...
+           Subsystem: National Instruments Device 76ca
+           Kernel driver in use: niusrpriok_shipped
+
+* A USRP X300 should appear with 'Subsystem: National Instruments Device 7736'
+* A USRP X310 should appear with 'Subsystem: National Instruments Device 76ca'
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+USRP device not enumerated (Windows)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+UHD requires the RIO device manager service to be running in order to
+communicate with an X-Series USRP over PCIe.
+This service is installed as a part of the USRP RIO (or NI-USRP) installer. On Windows, it can be found in
+the **Services** section in the Control Panel and it is started at system boot time. To ensure that the 
+service is indeed started, navigate to the Services tag in the Windows Task Manager and ensure that the 
+status of **niusrpriorpc** is "Running".
+
+If the device still does not enumerate after starting the device manager, make sure that the host computer
+has successfully detected it. You can do so by checking if your device shows up in the Windows Device Manager.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Monitor the host network traffic
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Use Wireshark to monitor packets sent to and received from the device.
+
+--------------
+Hardware Notes
+--------------
+
+^^^^^^^^^^^
+Front Panel
+^^^^^^^^^^^
+
+.. image:: ./res/x3x0_fp_overlay.png
+   :scale: 80%
+   :align: left
+
+* **JTAG**: USB connector for the on-board USB-JTAG programmer
+* **RF A Group**
+
+  * **TX/RX LED**: Indicates that data is streaming on the TX/RX channel on daughterboard A
+  * **RX2 LED**: Indicates that data is streaming on the RX2 channel on daughterboard A
+
+* **REF**: Indicates that the external Reference Clock is locked
+* **PPS**: Indicates a valid PPS signal by pulsing once per second
+* **AUX I/O**: Front panel GPIO connector.
+* **GPS**: Indicates that GPS reference is locked
+* **LINK**: Indicates that the host computer is communicating with the device (Activity)
+
+* **RF B Group**
+
+  * **TX/RX LED**: Indicates that data is streaming on the TX/RX channel on daughterboard B
+  * **RX2 LED**: Indicates that data is streaming on the RX2 channel on daughterboard B
+
+* **PWR**: Power switch
+
+^^^^^^^^^^
+Rear Panel
+^^^^^^^^^^
+   
+.. image:: ./res/x3x0_rp_overlay.png
+   :scale: 80%
+   :align: left
+   
+
+* **PWR**: Connector for the USRP-X Series power supply
+* **1G/10G ETH**: SFP+ ports for Ethernet interfaces
+* **REF OUT**: Output port for the exported reference clock
+* **REF IN**: Reference clock input
+* **PCIe x4**: Connector for Cabled PCI Express link
+* **PPS/TRIG OUT**: Output port for the PPS signal
+* **PPS/TRIG IN**: Input port for the PPS signal 
+* **GPS**: Connection for the GPS antenna
+
+^^^^^^^^^^^^^^^^^^
+Ref Clock - 10 MHz
+^^^^^^^^^^^^^^^^^^
+Using an external 10 MHz reference clock, a square wave will offer the best phase
+noise performance, but a sinusoid is acceptable.  The power level of the reference clock cannot exceed +15 dBm.
+
+^^^^^^^^^^^^^^^^^^^^^^
+PPS - Pulse Per Second
+^^^^^^^^^^^^^^^^^^^^^^
+Using a PPS signal for timestamp synchronization requires a square wave signal with the following a 5Vpp amplitude.
+
+To test the PPS input, you can use the following tool from the UHD examples:
+
+* **<args>** are device address arguments (optional if only one USRP device is on your machine)
+
+::
+
+    cd <install-path>/lib/uhd/examples
+    ./test_pps_input --args=<args>
+
+^^^^^^^^^^^^^^
+Internal GPSDO
+^^^^^^^^^^^^^^
+Please see the `Internal GPSDO Application Notes <./gpsdo_x3x0.html>`_
+for information on configuring and using the internal GPSDO.
+
+^^^^^^^^^^^^^^^^
+Front Panel GPIO
+^^^^^^^^^^^^^^^^
+
+Connector
+:::::::::
+
+.. image:: ./res/x3x0_gpio_conn.png
+   :scale: 75%
+   :align: left
+
+Pin Mapping
+:::::::::::
+
+* Pin 1:  +3.3V
+* Pin 2:  Data[0]
+* Pin 3:  Data[1]
+* Pin 4:  Data[2]
+* Pin 5:  Data[3]
+* Pin 6:  Data[4]
+* Pin 7:  Data[5]
+* Pin 8:  Data[6]
+* Pin 9:  Data[7]
+* Pin 10: Data[8]
+* Pin 11: Data[9]
+* Pin 12: Data[10]
+* Pin 13: Data[11]
+* Pin 14: 0V
+* Pin 15: 0V
+
+
+Please see the `GPIO API Notes <./gpio_api.html>`_ for information on configuring and using the GPIO bus.
+
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Debugging custom FPGA designs with Xilinx Chipscope
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Xilinx chipscope allows for debugging custom FPGA designs similar to a logic analyzer.
+USRP-X series devices can be used with Xilinx chipscope using the onboard USB JTAG connector.
+
+Further information on how to use Chipscope can be found in the Xilinx Chipscope Pro Software and Cores User Guide (UG029).
+
+-------------
+Miscellaneous
+-------------
+
+^^^^^^^^^^^^^^^^^^^^
+Multiple RX channels
+^^^^^^^^^^^^^^^^^^^^
+There are two complete DDC and DUC DSP chains in the FPGA. In the single channel case, 
+only one chain is ever used. To receive from both channels, the user must set the **RX** or **TX**
+subdevice specification.
+
+In the following example, a TVRX2 is installed.
+Channel 0 is sourced from subdevice **RX1**,
+and channel 1 is sourced from subdevice **RX2** (**RX1** and **RX2** are antenna connectors on the TVRX2 daughterboard).
+
+::
+
+    usrp->set_rx_subdev_spec("A:RX1 A:RX2");
+
+
+^^^^^^^^^^^^^^^^^
+Available Sensors
+^^^^^^^^^^^^^^^^^
+The following sensors are available for the USRP-X Series motherboards;
+they can be queried through the API.
+
+* **ref_locked** - clock reference locked (internal/external)
+* Other sensors are added when the GPSDO is enabled
diff --git a/host/docs/usrp_x3xx_fpga_burner.1 b/host/docs/usrp_x3xx_fpga_burner.1
new file mode 100644
index 000000000..3a8a27e69
--- /dev/null
+++ b/host/docs/usrp_x3xx_fpga_burner.1
@@ -0,0 +1,65 @@
+.TH "usrp_x3xx_fpga_burner" 1 "3.7.0" UHD "User Commands"
+.SH NAME
+usrp_x3xx_fpga_burner - USRP X-Series FPGA Burner
+.SH DESCRIPTION
+Burn an FPGA image onto a connected USRP X-Series device. The program takes
+two main arguments. The first is either an IP address or an NI-RIO resource 
+to decide the method of loading the FPGA image. The other is either the
+type of image to burn, in which case the program will choose the default image
+of that type and model, or a custom FPGA image path.
+.SH SYNOPSIS
+.B  usrp_x3xx_fpga_burner [OPTIONS]
+.SH OPTIONS
+.IP "Device IP Address:"
+--addr=\fI"Address"\fR
+. IP "Device NI-RIO Resource:"
+--resource=\fI"Resource"\fR
+. IP "RPC Port:"
+--rpc-port=\fI"Port"\fR (default=5444)
+. IP "Image Type (1G, HGS, or XGS):"
+--type=\fI"Type"\fR
+. IP "Custom FPGA path:"
+--fpga-path=\fI"Path"\fR
+. IP "Initialize USRP with image currently burned onto device (Ethernet only):"
+--configure
+. IP "Verify image during Ethernet burn (takes longer):"
+--verify
+. IP "List connected USRP X-Series devices:"
+--list
+.IP "This help information:"
+--help
+.SH EXAMPLES
+.SS Burning a 1-Gigabit image over Ethernet
+.sp
+usrp_x3xx_fpga_burner --addr=192.168.10.2 --type=1G
+.SS Burning a Hybrid image over PCIe
+usrp_x3xx_fpga_burner --resource=RIO0 --type=HGS
+.SS Burning a custom FPGA image over Ethernet
+usrp_x3xx_fpga_burner --addr=192.168.10.2 --fpga=path="custom_image.bit"
+.ft
+.fi
+.SH SEE ALSO
+UHD documentation:
+.B http://files.ettus.com/uhd_docs/manual/html/index.html
+.LP
+GR-UHD documentation:
+.B http://gnuradio.org/doc/doxygen/page_uhd.html
+.LP
+Other UHD programs:
+.sp
+uhd_images_downloader(1) usrp2_card_burner(1) usrp_n2xx_simple_net_burner(1)
+.SH AUTHOR
+This manual page was written by Nicholas Corgan
+for the Debian project (but may be used by others).
+.SH COPYRIGHT
+Copyright (c) 2014 Ettus Research LLC
+.LP
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+.LP
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
diff --git a/host/examples/CMakeLists.txt b/host/examples/CMakeLists.txt
index 53e913070..4f394bbef 100644
--- a/host/examples/CMakeLists.txt
+++ b/host/examples/CMakeLists.txt
@@ -36,6 +36,7 @@ SET(example_sources
     tx_waveforms.cpp
     txrx_loopback_to_file.cpp
     latency_test.cpp
+    fpgpio.cpp
 )
 
 #for each source: build an executable and install
diff --git a/host/examples/benchmark_rate.cpp b/host/examples/benchmark_rate.cpp
index 3b2ab8a1f..ea49d48d9 100644
--- a/host/examples/benchmark_rate.cpp
+++ b/host/examples/benchmark_rate.cpp
@@ -66,8 +66,18 @@ void benchmark_rx_rate(uhd::usrp::multi_usrp::sptr usrp, const std::string &rx_c
     cmd.time_spec = usrp->get_time_now() + uhd::time_spec_t(0.05);
     cmd.stream_now = (buffs.size() == 1);
     rx_stream->issue_stream_cmd(cmd);
+
     while (not boost::this_thread::interruption_requested()){
-        num_rx_samps += rx_stream->recv(buffs, max_samps_per_packet, md)*rx_stream->get_num_channels();
+        try {
+          num_rx_samps += rx_stream->recv(buffs, max_samps_per_packet, md)*rx_stream->get_num_channels();
+        }
+        catch (...) {
+          /* apparently, the boost thread interruption can sometimes result in
+             throwing exceptions not of type boost::exception, this catch allows
+             this thread to still attempt to issue the STREAM_MODE_STOP_CONTINUOUS
+          */
+          break;
+        }
 
         //handle the error codes
         switch(md.error_code){
@@ -78,10 +88,13 @@ void benchmark_rx_rate(uhd::usrp::multi_usrp::sptr usrp, const std::string &rx_c
             }
             break;
 
+        // ERROR_CODE_OVERFLOW can indicate overflow or sequence error
         case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
-            had_an_overflow = true;
             last_time = md.time_spec;
-            num_overflows++;
+            had_an_overflow = true;
+            // check out_of_sequence flag to see if it was a sequence error or overflow
+            if (!md.out_of_sequence)
+                num_overflows++;
             break;
 
         default:
@@ -89,7 +102,6 @@ void benchmark_rx_rate(uhd::usrp::multi_usrp::sptr usrp, const std::string &rx_c
             std::cerr << "Unexpected error on recv, continuing..." << std::endl;
             break;
         }
-
     }
     rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
 }
@@ -226,7 +238,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     boost::split(channel_strings, channel_list, boost::is_any_of("\"',"));
     for(size_t ch = 0; ch < channel_strings.size(); ch++){
         size_t chan = boost::lexical_cast<int>(channel_strings[ch]);
-        if(chan >= usrp->get_tx_num_channels() or chan >= usrp->get_tx_num_channels()){
+        if(chan >= usrp->get_tx_num_channels() or chan >= usrp->get_rx_num_channels()){
             throw std::runtime_error("Invalid channel(s) specified.");
         }
         else channel_nums.push_back(boost::lexical_cast<int>(channel_strings[ch]));
@@ -275,6 +287,6 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
 
     //finished
     std::cout << std::endl << "Done!" << std::endl << std::endl;
-
+   
     return EXIT_SUCCESS;
 }
diff --git a/host/examples/fpgpio.cpp b/host/examples/fpgpio.cpp
new file mode 100644
index 000000000..89a6ecec3
--- /dev/null
+++ b/host/examples/fpgpio.cpp
@@ -0,0 +1,374 @@
+//
+// Copyright 2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+// Example for front panel GPIO.
+// Bits are set as follows:
+// FPGPIO[0] = ATR output 1 at idle
+// FPGPIO[1] = ATR output 1 during RX
+// FPGPIO[2] = ATR output 1 during TX
+// FPGPIO[3] = ATR output 1 during full duplex
+// FPGPIO[4] = output
+// FPGPIO[5] = input
+// FPGPIO[6] = input
+// FPGPIO[7] = input
+// FPGPIO[8] = input
+// FPGPIO[9] = input
+// FPGPIO[10] = input
+// The example cycles through idle, TX, RX, and full duplex, spending 2 seconds for each.
+// Outputs can be physically looped back to inputs for verification testing.
+
+#include <uhd/utils/thread_priority.hpp>
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/usrp/multi_usrp.hpp>
+#include <uhd/convert.hpp>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <boost/thread.hpp>
+#include <csignal>
+#include <iostream>
+
+#define FPGPIO_DEFAULT_CPU_FORMAT   "fc32"
+#define FPGPIO_DEFAULT_OTW_FORMAT   "sc16"
+#define FPGPIO_DEFAULT_RX_RATE      1e6
+#define FPGPIO_DEFAULT_TX_RATE      1e6
+#define FPGPIO_DEFAULT_DWELL_TIME   2.0
+#define FPGPIO_NUM_BITS             11
+#define FPGPIO_BIT(x)               (1 << x)
+
+namespace po = boost::program_options;
+
+static bool stop_signal_called = false;
+void sig_int_handler(int){stop_signal_called = true;}
+
+std::string to_bit_string(boost::uint16_t val)
+{
+    std::string out;
+    for (int i = FPGPIO_NUM_BITS - 1; i >= 0; i--)
+    {
+        std::string bit = ((val >> i) & 1) ? "1" : "0";
+        out += "  ";
+        out += bit;
+    }
+    return out;
+}
+
+void output_reg_values(const std::string bank, const uhd::usrp::multi_usrp::sptr &usrp)
+{
+    std::cout << (boost::format("Bit       "));
+    for (int i = FPGPIO_NUM_BITS - 1; i >= 0; i--)
+        std::cout << (boost::format(" %s%d") % (i < 10 ? " " : "") % i);
+    std::cout << std::endl;
+    std::cout << "CTRL:     " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("CTRL")))) << std::endl;
+    std::cout << "DDR:      " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("DDR")))) << std::endl;
+    std::cout << "ATR_0X:   " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("ATR_0X")))) << std::endl;
+    std::cout << "ATR_RX:   " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("ATR_RX")))) << std::endl;
+    std::cout << "ATR_TX:   " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("ATR_TX")))) << std::endl;
+    std::cout << "ATR_XX:   " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("ATR_XX")))) << std::endl;
+    std::cout << "OUT:      " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("OUT")))) << std::endl;
+    std::cout << "READBACK: " << to_bit_string(uint16_t(usrp->get_gpio_attr(bank, std::string("READBACK")))) << std::endl;
+}
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+    uhd::set_thread_priority_safe();
+
+    //variables to be set by po
+    std::string args;
+    std::string cpu, otw;
+    double rx_rate, tx_rate, dwell;
+    const std::string fpgpio = "FP0";
+
+    //setup the program options
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("args", po::value<std::string>(&args)->default_value(""), "multi uhd device address args")
+        ("repeat", "repeat loop until Ctrl-C is pressed")
+        ("cpu", po::value<std::string>(&cpu)->default_value(FPGPIO_DEFAULT_CPU_FORMAT), "cpu data format")
+        ("otw", po::value<std::string>(&otw)->default_value(FPGPIO_DEFAULT_OTW_FORMAT), "over the wire data format")
+        ("rx_rate", po::value<double>(&rx_rate)->default_value(FPGPIO_DEFAULT_RX_RATE), "rx sample rate")
+        ("tx_rate", po::value<double>(&tx_rate)->default_value(FPGPIO_DEFAULT_TX_RATE), "tx sample rate")
+        ("dwell", po::value<double>(&dwell)->default_value(FPGPIO_DEFAULT_DWELL_TIME), "dwell time in seconds for each test case")
+    ;
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+
+    //print the help message
+    if (vm.count("help")){
+        std::cout << boost::format("Front Panel GPIO %s") % desc << std::endl;
+        return ~0;
+    }
+
+    //create a usrp device
+    std::cout << std::endl;
+    std::cout << boost::format("Creating the usrp device with: %s...") % args << std::endl;
+    uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args);
+    std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
+
+    //print out initial unconfigured state of FP GPIO
+    std::cout << "Unconfigured GPIO values:" << std::endl;
+    output_reg_values(fpgpio, usrp);
+
+    //configure GPIO registers
+    uint32_t ctrl = 0;      // default all as manual
+    uint32_t ddr = 0;       // default all as input
+    uint32_t atr_idle = 0;
+    uint32_t atr_rx = 0;
+    uint32_t atr_tx = 0;
+    uint32_t atr_duplex = 0;
+    uint32_t mask = 0x7ff;
+
+    //set up FPGPIO outputs:
+    //FPGPIO[0] = ATR output 1 at idle
+    ctrl |= FPGPIO_BIT(0);
+    atr_idle |= FPGPIO_BIT(0);
+    ddr |= FPGPIO_BIT(0);
+
+    //FPGPIO[1] = ATR output 1 during RX
+    ctrl |= FPGPIO_BIT(1);
+    ddr |= FPGPIO_BIT(1);
+    atr_rx |= FPGPIO_BIT(1);
+
+    //FPGPIO[2] = ATR output 1 during TX
+    ctrl |= FPGPIO_BIT(2);
+    ddr |= FPGPIO_BIT(2);
+    atr_tx |= FPGPIO_BIT(2);
+
+    //FPGPIO[3] = ATR output 1 during full duplex
+    ctrl |= FPGPIO_BIT(3);
+    ddr |= FPGPIO_BIT(3);
+    atr_duplex |= FPGPIO_BIT(3);
+
+    //FPGPIO[4] = output
+    ddr |= FPGPIO_BIT(4);
+
+    //set data direction register (DDR)
+    usrp->set_gpio_attr(fpgpio, std::string("DDR"), ddr, mask);
+
+    //set ATR registers
+    usrp->set_gpio_attr(fpgpio, std::string("ATR_0X"), atr_idle, mask);
+    usrp->set_gpio_attr(fpgpio, std::string("ATR_RX"), atr_rx, mask);
+    usrp->set_gpio_attr(fpgpio, std::string("ATR_TX"), atr_tx, mask);
+    usrp->set_gpio_attr(fpgpio, std::string("ATR_XX"), atr_duplex, mask);
+
+    //set control register
+    usrp->set_gpio_attr(fpgpio, std::string("CTRL"), ctrl, mask);
+
+    //print out initial state of FP GPIO
+    std::cout << "\nConfigured GPIO values:" << std::endl;
+    output_reg_values(fpgpio, usrp);
+    std::cout << std::endl;
+
+    //set up streams
+    uhd::stream_args_t rx_args(cpu, otw);
+    uhd::stream_args_t tx_args(cpu, otw);
+    uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(rx_args);
+    uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(tx_args);
+    uhd::stream_cmd_t rx_cmd(uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+    rx_cmd.stream_now = true;
+    usrp->set_rx_rate(rx_rate);
+    usrp->set_tx_rate(tx_rate);
+
+    //set up buffers for tx and rx
+    const size_t max_samps_per_packet = rx_stream->get_max_num_samps();
+    const size_t nsamps_per_buff = max_samps_per_packet;
+    std::vector<char> rx_buff(max_samps_per_packet*uhd::convert::get_bytes_per_item(cpu));
+    std::vector<char> tx_buff(max_samps_per_packet*uhd::convert::get_bytes_per_item(cpu));
+    std::vector<void *> rx_buffs, tx_buffs;
+    for (size_t ch = 0; ch < rx_stream->get_num_channels(); ch++)
+        rx_buffs.push_back(&rx_buff.front()); //same buffer for each channel
+    for (size_t ch = 0; ch < tx_stream->get_num_channels(); ch++)
+        tx_buffs.push_back(&tx_buff.front()); //same buffer for each channel
+
+    uhd::rx_metadata_t rx_md;
+    uhd::tx_metadata_t tx_md;
+    tx_md.has_time_spec = false;
+    tx_md.start_of_burst = true;
+    uhd::time_spec_t stop_time;
+    double timeout = 0.01;
+    uhd::time_spec_t dwell_time(dwell);
+    int loop = 0;
+    boost::uint32_t rb, expected;
+
+    //register singal handler
+    std::signal(SIGINT, &sig_int_handler);
+
+    //Test the mask - only need to test once with no dwell time
+    std::cout << "\nTesting mask..." << std::flush;
+    //send a value of all 1's to the DDR with a mask for only bit 10
+    usrp->set_gpio_attr(fpgpio, std::string("DDR"), ~0, FPGPIO_BIT(10));
+    //bit 10 should now be 1, but all the other bits should be unchanged
+    rb = usrp->get_gpio_attr(fpgpio, std::string("DDR")) & mask;
+    expected = ddr | FPGPIO_BIT(10);
+    if (rb == expected)
+        std::cout << "pass" << std::endl;
+    else
+        std::cout << "fail" << std::endl;
+    std::cout << std::endl;
+    output_reg_values(fpgpio, usrp);
+    usrp->set_gpio_attr(fpgpio, std::string("DDR"), ddr, mask);
+
+    while (not stop_signal_called)
+    {
+        int failures = 0;
+
+        if (vm.count("repeat"))
+            std::cout << "Press Ctrl + C to quit..." << std::endl;
+
+        // test user controlled GPIO and ATR idle by setting bit 4 high for 1 second
+        std::cout << "\nTesting user controlled GPIO and ATR idle output..." << std::flush;
+        usrp->set_gpio_attr(fpgpio, "OUT", 1 << 4, 1 << 4);
+        stop_time = usrp->get_time_now() + dwell_time;
+        while (not stop_signal_called and usrp->get_time_now() < stop_time)
+        {
+            boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+        }
+        rb = usrp->get_gpio_attr(fpgpio, "READBACK");
+        expected = FPGPIO_BIT(4) | FPGPIO_BIT(0);
+        if ((rb & expected) != expected)
+        {
+            ++failures;
+            std::cout << "fail" << std::endl;
+            if ((rb & FPGPIO_BIT(0)) == 0)
+                std::cout << "Bit 0 should be set, but is not" << std::endl;
+            if ((rb & FPGPIO_BIT(4)) == 0)
+                std::cout << "Bit 4 should be set, but is not" << std::endl;
+        } else {
+            std::cout << "pass" << std::endl;
+        }
+        std::cout << std::endl;
+        output_reg_values(fpgpio, usrp);
+        usrp->set_gpio_attr(fpgpio, "OUT", 0, FPGPIO_BIT(4));
+        if (stop_signal_called)
+            break;
+
+        // test ATR RX by receiving for 1 second
+        std::cout << "\nTesting ATR RX output..." << std::flush;
+        rx_cmd.stream_mode = uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS;
+        rx_stream->issue_stream_cmd(rx_cmd);
+        stop_time = usrp->get_time_now() + dwell_time;
+        while (not stop_signal_called and usrp->get_time_now() < stop_time)
+        {
+            try {
+                rx_stream->recv(rx_buffs, nsamps_per_buff, rx_md, timeout);
+            } catch(...){}
+        }
+        rb = usrp->get_gpio_attr(fpgpio, "READBACK");
+        expected = FPGPIO_BIT(1);
+        if ((rb & expected) != expected)
+        {
+            ++failures;
+            std::cout << "fail" << std::endl;
+            std::cout << "Bit 1 should be set, but is not" << std::endl;
+        } else {
+            std::cout << "pass" << std::endl;
+        }
+        std::cout << std::endl;
+        output_reg_values(fpgpio, usrp);
+        rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+        //clear out any data left in the rx stream
+        try {
+            rx_stream->recv(rx_buffs, nsamps_per_buff, rx_md, timeout);
+        } catch(...){}
+        if (stop_signal_called)
+            break;
+
+        // test ATR TX by transmitting for 1 second
+        std::cout << "\nTesting ATR TX output..." << std::flush;
+        stop_time = usrp->get_time_now() + dwell_time;
+        tx_md.start_of_burst = true;
+        tx_md.end_of_burst = false;
+        while (not stop_signal_called and usrp->get_time_now() < stop_time)
+        {
+            try {
+                tx_stream->send(tx_buffs, nsamps_per_buff, tx_md, timeout);
+                tx_md.start_of_burst = false;
+            } catch(...){}
+        }
+        rb = usrp->get_gpio_attr(fpgpio, "READBACK");
+        expected = FPGPIO_BIT(2);
+        if ((rb & expected) != expected)
+        {
+            ++failures;
+            std::cout << "fail" << std::endl;
+            std::cout << "Bit 2 should be set, but is not" << std::endl;
+        } else {
+            std::cout << "pass" << std::endl;
+        }
+        std::cout << std::endl;
+        output_reg_values(fpgpio, usrp);
+        tx_md.end_of_burst = true;
+        try {
+            tx_stream->send(tx_buffs, nsamps_per_buff, tx_md, timeout);
+        } catch(...){}
+        if (stop_signal_called)
+            break;
+
+        // test ATR RX by transmitting and receiving for 1 second
+        std::cout << "\nTesting ATR full duplex output..." << std::flush;
+        rx_cmd.stream_mode = uhd::stream_cmd_t::STREAM_MODE_START_CONTINUOUS;
+        rx_stream->issue_stream_cmd(rx_cmd);
+        tx_md.start_of_burst = true;
+        tx_md.end_of_burst = false;
+        stop_time = usrp->get_time_now() + dwell_time;
+        while (not stop_signal_called and usrp->get_time_now() < stop_time)
+        {
+            try {
+                tx_stream->send(rx_buffs, nsamps_per_buff, tx_md, timeout);
+                tx_md.start_of_burst = false;
+                rx_stream->recv(tx_buffs, nsamps_per_buff, rx_md, timeout);
+            } catch(...){}
+        }
+        rb = usrp->get_gpio_attr(fpgpio, "READBACK");
+        expected = FPGPIO_BIT(3);
+        if ((rb & expected) != expected)
+        {
+            ++failures;
+            std::cout << "fail" << std::endl;
+            std::cout << "Bit 3 should be set, but is not" << std::endl;
+        } else {
+            std::cout << "pass" << std::endl;
+        }
+        std::cout << std::endl;
+        output_reg_values(fpgpio, usrp);
+        rx_stream->issue_stream_cmd(uhd::stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+        tx_md.end_of_burst = true;
+        try {
+            tx_stream->send(tx_buffs, nsamps_per_buff, tx_md, timeout);
+        } catch(...){}
+        //clear out any data left in the rx stream
+        try {
+            rx_stream->recv(rx_buffs, nsamps_per_buff, rx_md, timeout);
+        } catch(...){}
+
+        std::cout << std::endl;
+        if (failures)
+            std::cout << failures << " tests failed" << std::endl;
+        else
+            std::cout << "All tests passed!" << std::endl;
+
+        if (!vm.count("repeat"))
+            break;
+
+        std::cout << (boost::format("\nLoop %d completed")  % ++loop) << std::endl;
+    }
+
+    //finished
+    std::cout << std::endl << "Done!" << std::endl << std::endl;
+
+    return EXIT_SUCCESS;
+}
diff --git a/host/examples/rx_timed_samples.cpp b/host/examples/rx_timed_samples.cpp
index 0eea2ffee..cc9216cb7 100644
--- a/host/examples/rx_timed_samples.cpp
+++ b/host/examples/rx_timed_samples.cpp
@@ -20,6 +20,7 @@
 #include <uhd/usrp/multi_usrp.hpp>
 #include <boost/program_options.hpp>
 #include <boost/format.hpp>
+#include <boost/algorithm/string.hpp>
 #include <iostream>
 #include <complex>
 
@@ -30,19 +31,24 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
 
     //variables to be set by po
     std::string args;
+    std::string wire;
     double seconds_in_future;
     size_t total_num_samps;
     double rate;
+    std::string channel_list;
 
     //setup the program options
     po::options_description desc("Allowed options");
     desc.add_options()
         ("help", "help message")
         ("args", po::value<std::string>(&args)->default_value(""), "single uhd device address args")
+        ("wire", po::value<std::string>(&wire)->default_value(""), "the over the wire type, sc16, sc8, etc")
         ("secs", po::value<double>(&seconds_in_future)->default_value(1.5), "number of seconds in the future to receive")
         ("nsamps", po::value<size_t>(&total_num_samps)->default_value(10000), "total number of samples to receive")
         ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of incoming samples")
         ("dilv", "specify to disable inner-loop verbose")
+        ("channels", po::value<std::string>(&channel_list)->default_value("0"), "which channel(s) to use (specify \"0\", \"1\", \"0,1\", etc)")
+    
     ;
     po::variables_map vm;
     po::store(po::parse_command_line(argc, argv, desc), vm);
@@ -62,6 +68,18 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     uhd::usrp::multi_usrp::sptr usrp = uhd::usrp::multi_usrp::make(args);
     std::cout << boost::format("Using Device: %s") % usrp->get_pp_string() << std::endl;
 
+   //detect which channels to use
+    std::vector<std::string> channel_strings;
+    std::vector<size_t> channel_nums;
+    boost::split(channel_strings, channel_list, boost::is_any_of("\"',"));
+    for(size_t ch = 0; ch < channel_strings.size(); ch++){
+        size_t chan = boost::lexical_cast<int>(channel_strings[ch]);
+        if(chan >= usrp->get_tx_num_channels() or chan >= usrp->get_rx_num_channels()){
+            throw std::runtime_error("Invalid channel(s) specified.");
+        }
+        else channel_nums.push_back(boost::lexical_cast<int>(channel_strings[ch]));
+    }
+
     //set the rx sample rate
     std::cout << boost::format("Setting RX Rate: %f Msps...") % (rate/1e6) << std::endl;
     usrp->set_rx_rate(rate);
@@ -71,7 +89,8 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     usrp->set_time_now(uhd::time_spec_t(0.0));
 
     //create a receive streamer
-    uhd::stream_args_t stream_args("fc32"); //complex floats
+    uhd::stream_args_t stream_args("fc32", wire); //complex floats
+    stream_args.channels = channel_nums;
     uhd::rx_streamer::sptr rx_stream = usrp->get_rx_stream(stream_args);
 
     //setup streaming
@@ -90,6 +109,9 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
 
     //allocate buffer to receive with samples
     std::vector<std::complex<float> > buff(rx_stream->get_max_num_samps());
+    std::vector<void *> buffs;
+    for (size_t ch = 0; ch < rx_stream->get_num_channels(); ch++)
+        buffs.push_back(&buff.front()); //same buffer for each channel
 
     //the first call to recv() will block this many seconds before receiving
     double timeout = seconds_in_future + 0.1; //timeout (delay before receive + padding)
@@ -98,7 +120,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     while(num_acc_samps < total_num_samps){
         //receive a single packet
         size_t num_rx_samps = rx_stream->recv(
-            &buff.front(), buff.size(), md, timeout, true
+            buffs, buff.size(), md, timeout, true
         );
 
         //use a small timeout for subsequent packets
diff --git a/host/examples/transport_hammer.cpp b/host/examples/transport_hammer.cpp
index a44e81a82..4b949e5bd 100644
--- a/host/examples/transport_hammer.cpp
+++ b/host/examples/transport_hammer.cpp
@@ -83,7 +83,8 @@ void rx_hammer(uhd::usrp::multi_usrp::sptr usrp, const std::string &rx_cpu, uhd:
         case uhd::rx_metadata_t::ERROR_CODE_OVERFLOW:
             had_an_overflow = true;
             last_time = md.time_spec;
-            num_overflows++;
+            if (!md.out_of_sequence)
+                num_overflows++;
             break;
 
         default:
diff --git a/host/examples/tx_samples_from_file.cpp b/host/examples/tx_samples_from_file.cpp
index 6926f8690..000f5086b 100644
--- a/host/examples/tx_samples_from_file.cpp
+++ b/host/examples/tx_samples_from_file.cpp
@@ -71,7 +71,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     //variables to be set by po
     std::string args, file, type, ant, subdev, ref, wirefmt;
     size_t spb;
-    double rate, freq, gain, bw, delay;
+    double rate, freq, gain, bw, delay, lo_off;
 
     //setup the program options
     po::options_description desc("Allowed options");
@@ -83,6 +83,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         ("spb", po::value<size_t>(&spb)->default_value(10000), "samples per buffer")
         ("rate", po::value<double>(&rate), "rate of outgoing samples")
         ("freq", po::value<double>(&freq), "RF center frequency in Hz")
+        ("lo_off", po::value<double>(&lo_off), "Offset for frontend LO in Hz (optional)")
         ("gain", po::value<double>(&gain), "gain for the RF chain")
         ("ant", po::value<std::string>(&ant), "daughterboard antenna selection")
         ("subdev", po::value<std::string>(&subdev), "daughterboard subdevice specification")
@@ -133,7 +134,9 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         return ~0;
     }
     std::cout << boost::format("Setting TX Freq: %f MHz...") % (freq/1e6) << std::endl;
-    uhd::tune_request_t tune_request(freq);
+    uhd::tune_request_t tune_request;
+    if(vm.count("lo_off")) tune_request = uhd::tune_request_t(freq, lo_off);
+    else tune_request = uhd::tune_request_t(freq);
     if(vm.count("int-n")) tune_request.args = uhd::device_addr_t("mode_n=int-n");
     usrp->set_tx_freq(tune_request);
     std::cout << boost::format("Actual TX Freq: %f MHz...") % (usrp->get_tx_freq()/1e6) << std::endl << std::endl;
diff --git a/host/examples/tx_timed_samples.cpp b/host/examples/tx_timed_samples.cpp
index 8826deadd..667ae66a9 100644
--- a/host/examples/tx_timed_samples.cpp
+++ b/host/examples/tx_timed_samples.cpp
@@ -31,6 +31,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
 
     //variables to be set by po
     std::string args;
+    std::string wire;
     double seconds_in_future;
     size_t total_num_samps;
     double rate;
@@ -41,6 +42,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     desc.add_options()
         ("help", "help message")
         ("args", po::value<std::string>(&args)->default_value(""), "single uhd device address args")
+        ("wire", po::value<std::string>(&wire)->default_value(""), "the over the wire type, sc16, sc8, etc")
         ("secs", po::value<double>(&seconds_in_future)->default_value(1.5), "number of seconds in the future to transmit")
         ("nsamps", po::value<size_t>(&total_num_samps)->default_value(10000), "total number of samples to transmit")
         ("rate", po::value<double>(&rate)->default_value(100e6/16), "rate of outgoing samples")
@@ -74,7 +76,7 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
     usrp->set_time_now(uhd::time_spec_t(0.0));
 
     //create a transmit streamer
-    uhd::stream_args_t stream_args("fc32"); //complex floats
+    uhd::stream_args_t stream_args("fc32", wire); //complex floats
     uhd::tx_streamer::sptr tx_stream = usrp->get_tx_stream(stream_args);
 
     //allocate buffer with data to send
diff --git a/host/include/uhd/device.hpp b/host/include/uhd/device.hpp
index de39383c9..1090c243c 100644
--- a/host/include/uhd/device.hpp
+++ b/host/include/uhd/device.hpp
@@ -21,6 +21,7 @@
 #include <uhd/config.hpp>
 #include <uhd/stream.hpp>
 #include <uhd/deprecated.hpp>
+#include <uhd/property_tree.hpp>
 #include <uhd/types/device_addr.hpp>
 #include <boost/utility.hpp>
 #include <boost/shared_ptr.hpp>
@@ -83,10 +84,12 @@ public:
     virtual tx_streamer::sptr get_tx_stream(const stream_args_t &args) = 0;
 
     //! Get access to the underlying property structure
-    virtual boost::shared_ptr<property_tree> get_tree(void) const = 0;
+    uhd::property_tree::sptr get_tree(void) const;
 
     #include <uhd/device_deprecated.ipp>
 
+protected:
+    uhd::property_tree::sptr _tree;
 };
 
 } //namespace uhd
diff --git a/host/include/uhd/transport/CMakeLists.txt b/host/include/uhd/transport/CMakeLists.txt
index 1031da817..c22554e97 100644
--- a/host/include/uhd/transport/CMakeLists.txt
+++ b/host/include/uhd/transport/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright 2010-2011 Ettus Research LLC
+# Copyright 2010-2013 Ettus Research LLC
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -23,6 +23,7 @@ UHD_INSTALL(FILES
     if_addrs.hpp
     udp_simple.hpp
     udp_zero_copy.hpp
+    tcp_zero_copy.hpp
     usb_control.hpp
     usb_zero_copy.hpp
     usb_device_handle.hpp
diff --git a/host/include/uhd/transport/nirio/nifpga_lvbitx.h b/host/include/uhd/transport/nirio/nifpga_lvbitx.h
new file mode 100644
index 000000000..598f7fcbe
--- /dev/null
+++ b/host/include/uhd/transport/nirio/nifpga_lvbitx.h
@@ -0,0 +1,59 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_NIFPGA_LVBITX_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_NIFPGA_LVBITX_H
+
+#include <uhd/transport/nirio/nirio_resource_manager.h>
+#include <uhd/transport/nirio/niriok_proxy.h>
+#include <boost/smart_ptr.hpp>
+
+namespace uhd { namespace niusrprio {
+
+class UHD_API nifpga_lvbitx {
+public:
+    typedef boost::shared_ptr<nifpga_lvbitx> sptr;
+
+    virtual ~nifpga_lvbitx() {};
+
+    virtual const char* get_bitfile_path() = 0;
+    virtual const char* get_signature() = 0;
+    virtual const char* get_bitstream_checksum() = 0;
+
+    virtual size_t get_input_fifo_count() = 0;
+    virtual const char** get_input_fifo_names() = 0;
+
+    virtual size_t get_output_fifo_count() = 0;
+    virtual const char** get_output_fifo_names() = 0;
+
+    virtual size_t get_control_count() = 0;
+    virtual const char** get_control_names() = 0;
+
+    virtual size_t get_indicator_count() = 0;
+    virtual const char** get_indicator_names() = 0;
+
+    virtual void init_register_info(nirio_register_info_vtr& vtr) = 0;
+    virtual void init_fifo_info(nirio_fifo_info_vtr& vtr) = 0;
+
+protected:
+    std::string _get_bitstream_checksum(const std::string& file_path);
+    std::string _get_fpga_images_dir(const std::string search_paths);
+};
+}}
+
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_NIFPGA_LVBITX_H */
+
diff --git a/host/include/uhd/transport/nirio/nirio_driver_iface.h b/host/include/uhd/transport/nirio/nirio_driver_iface.h
new file mode 100644
index 000000000..46a1146de
--- /dev/null
+++ b/host/include/uhd/transport/nirio/nirio_driver_iface.h
@@ -0,0 +1,535 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_DRIVER_IFACE_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_DRIVER_IFACE_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string>
+#include <uhd/transport/nirio/status.h>
+#include <uhd/config.hpp>
+#if defined(UHD_PLATFORM_WIN32)
+    #include <Windows.h>
+    #pragma warning(disable:4201)  // nonstandard extension used : nameless struct/union
+        #include <WinIoCtl.h>
+    #pragma warning(default:4201)
+#elif defined(UHD_PLATFORM_MACOS) || defined(UHD_PLATFORM_BSD)
+    #include <IOKit/IOKitLib.h>
+#endif
+
+// CTL_CODE macro for non-win OSes
+#ifndef UHD_PLATFORM_WIN32
+    #define CTL_CODE(a,controlCode,b,c) (controlCode)
+#endif
+
+namespace nirio_driver_iface {
+
+const uint32_t NIRIO_IOCTL_BASE = 0x800;
+
+const uint32_t NIRIO_IOCTL_SYNCOP =
+   CTL_CODE(FILE_DEVICE_UNKNOWN,
+            NIRIO_IOCTL_BASE + 4,
+            METHOD_OUT_DIRECT,
+            FILE_READ_DATA | FILE_WRITE_DATA);
+                                ///< The synchronous operation code. Note: We
+                                /// must use METHOD_OUT_DIRECT on the syncOp()
+                                /// IOCTL to ensure the contents of the output
+                                /// block are available in the kernel.
+
+const uint32_t NIRIO_IOCTL_GET_IFACE_NUM =
+   CTL_CODE(FILE_DEVICE_UNKNOWN,
+            NIRIO_IOCTL_BASE + 6,
+            METHOD_BUFFERED,
+            FILE_READ_DATA);    ///< Get the interface number for a device
+
+const uint32_t NIRIO_IOCTL_GET_SESSION =
+   CTL_CODE(FILE_DEVICE_UNKNOWN,
+            NIRIO_IOCTL_BASE + 8,
+            METHOD_BUFFERED,
+            FILE_READ_ACCESS);  ///< Gets a previously opened session to a device
+
+const uint32_t NIRIO_IOCTL_POST_OPEN =
+   CTL_CODE(FILE_DEVICE_UNKNOWN,
+            NIRIO_IOCTL_BASE + 9,
+            METHOD_BUFFERED,
+            FILE_READ_ACCESS);  ///< Called after opening a session
+
+const uint32_t NIRIO_IOCTL_PRE_CLOSE =
+   CTL_CODE(FILE_DEVICE_UNKNOWN,
+            NIRIO_IOCTL_BASE + 10,
+            METHOD_BUFFERED,
+            FILE_READ_ACCESS);  ///< Called before closing a session
+
+
+// -------------------------------
+// Function Codes: defined as integers rather than enums because they
+// are going to be carried accross boundaries so size matters
+
+namespace NIRIO_FUNC
+{
+   const uint32_t GET32             = 0x00000001;
+   const uint32_t SET32             = 0x00000002;
+   const uint32_t SET_DRIVER_CONFIG = 0x00000007;
+   const uint32_t FIFO              = 0x00000008;
+   const uint32_t IO                = 0x0000000A;
+   const uint32_t FIFO_STOP_ALL     = 0x0000000C;
+   const uint32_t ADD_RESOURCE      = 0x0000000D;
+   const uint32_t GET_STRING        = 0x0000000E;
+   const uint32_t SET_STRING        = 0x0000000F;
+   const uint32_t DOWNLOAD          = 0x00000013;
+   const uint32_t RESET             = 0x00000014;
+}
+
+namespace NIRIO_RESOURCE
+{
+   const uint32_t INPUT_FIFO    = 0xD0000001;
+   const uint32_t OUTPUT_FIFO   = 0xD0000002;
+}
+
+namespace NIRIO_FIFO
+{
+   const uint32_t CONFIGURE = 0x80000001;
+   const uint32_t START     = 0x80000002;
+   const uint32_t STOP      = 0x80000003;
+   const uint32_t READ      = 0x80000004;
+   const uint32_t WRITE     = 0x80000005;
+   const uint32_t WAIT      = 0x80000006;
+   const uint32_t GRANT     = 0x80000007;
+}
+
+namespace NIRIO_IO
+{
+   const uint32_t POKE64             = 0xA0000005;
+   const uint32_t POKE32             = 0xA0000006;
+   const uint32_t POKE16             = 0xA0000007;
+   const uint32_t POKE8              = 0xA0000008;
+   const uint32_t PEEK64             = 0xA0000009;
+   const uint32_t PEEK32             = 0xA000000A;
+   const uint32_t PEEK16             = 0xA000000B;
+   const uint32_t PEEK8              = 0xA000000C;
+   const uint32_t READ_BLOCK         = 0xA000000D;
+   const uint32_t WRITE_BLOCK        = 0xA000000E;
+   const uint32_t GET_IO_WINDOW      = 0xA000000F;
+   const uint32_t GET_IO_WINDOW_SIZE = 0xA0000010;
+}
+
+struct nirio_ioctl_packet_t {
+    nirio_ioctl_packet_t(
+        void* const _outBuf,
+        const uint32_t _outSize,
+        const int32_t _statusCode)
+    {
+        outBuf._64BitField = 0;
+        outBuf.pointer = _outBuf;
+        outSize    = _outSize;
+        statusCode = _statusCode;
+    };
+
+    union {
+        void* pointer;
+        uint64_t _64BitField;
+    } outBuf;
+
+    uint32_t outSize;
+    int32_t statusCode;
+};
+
+struct nirio_ioctl_block_t
+{
+    uint64_t inBuf;
+    uint64_t outBuf;
+    uint32_t inBufLength;
+    uint32_t outBufLength;
+    uint32_t bytesReturned;
+    uint32_t padding;
+};
+
+struct nirio_syncop_in_params_t
+{
+   uint32_t function;
+   uint32_t subfunction;
+
+   union
+   {
+      struct
+      {
+         uint32_t attribute;
+         uint32_t value;
+      } attribute32;
+
+      struct
+      {
+         uint32_t attribute;
+         uint64_t value;
+      } attribute64;
+
+      struct
+      {
+         uint32_t attribute;
+      } attributeStr;
+
+      struct
+      {
+         uint32_t attribute;
+      } download;
+
+      union
+      {
+         struct
+         {
+            uint32_t reserved_field_0_0_0;
+         } reserved_field_0_0;
+         struct
+         {
+            uint32_t reserved_field_0_1_0;
+            uint32_t reserved_field_0_1_1;
+         } reserved_field_0_1;
+         struct
+         {
+            uint32_t reserved_field_0_2_0;
+         } reserved_field_0_2;
+      } reserved_field_0;
+
+      union
+      {
+         struct
+         {
+            uint32_t channel;
+            uint32_t baseAddress;
+            uint32_t depthInSamples;
+            uint32_t version;
+         } fifo;
+         struct
+         {
+            uint32_t channel;
+            uint32_t baseAddress;
+            uint32_t depthInSamples;
+            uint32_t version;
+            uint32_t scalarType;
+            uint32_t bitWidth;
+         } fifoWithDataType;
+         struct
+         {
+            uint64_t rangeBaseAddress;
+            uint32_t rangeSizeInBytes;
+            uint32_t rangeAttribute;
+         } atomic; // obsolete
+      } add;
+
+      struct
+      {
+         uint32_t channel;
+
+         union
+         {
+            struct
+            {
+               uint32_t requestedDepth;
+               uint8_t  requiresActuals;
+            } config;
+            struct
+            {
+               uint32_t timeout;
+            } read;
+            struct
+            {
+               uint32_t timeout;
+               uint32_t scalarType;
+               uint32_t bitWidth;
+            } readWithDataType;
+            struct
+            {
+               uint32_t timeout;
+            } write;
+            struct
+            {
+               uint32_t timeout;
+               uint32_t scalarType;
+               uint32_t bitWidth;
+            } writeWithDataType;
+            struct
+            {
+               uint32_t elementsRequested;
+               uint32_t scalarType;
+               uint32_t bitWidth;
+               uint32_t timeout;
+               uint8_t  output;
+            } wait;
+            struct
+            {
+               uint32_t elements;
+            } grant;
+         } op;
+      } fifo;
+
+      struct
+      {
+         uint64_t reserved_field_1_0;
+         uint32_t reserved_field_1_1;
+         uint32_t reserved_field_1_2;
+      } reserved_field_1; // Obsolete
+
+      struct
+      {
+         uint32_t offset;
+         union
+         {
+            uint64_t value64;
+            uint32_t value32;
+            uint16_t value16;
+            uint8_t  value8;
+         } value;
+         union
+         {
+            uint32_t   sizeToMap;
+         } memoryMappedIoWindow;
+      } io;
+
+      struct
+      {
+         uint32_t reserved_field_2_0;
+         uint32_t reserved_field_2_1;
+      } reserved_field_2;
+
+      struct
+      {
+         uint32_t reserved_field_3_0;
+      } reserved_field_3;
+
+      union
+      {
+         struct
+         {
+            uint32_t reserved_field_4_0;
+            int32_t  reserved_field_4_1;
+         } wait;
+      } reserved_field_4;
+
+   } params;
+
+   uint32_t inbufByteLen;
+
+   union
+   {
+      const void* pointer;
+      uint64_t    _64BitField;
+   } inbuf;
+};
+
+static inline void init_syncop_in_params(nirio_syncop_in_params_t& param, const void* const buf, const uint32_t len)
+{
+   param.inbuf._64BitField = 0;
+   param.inbuf.pointer = buf;
+   param.inbufByteLen = len;
+}
+
+
+struct nirio_syncop_out_params_t
+{
+   union
+   {
+      struct
+      {
+         uint32_t value;
+      } attribute32;
+
+      struct
+      {
+         uint64_t value;
+      } attribute64;
+
+      union
+      {
+         struct
+         {
+            uint32_t reserved_field_0_0;
+         } enable;
+      } reserved_field_0;
+
+      struct
+      {
+         union
+         {
+            struct
+            {
+               uint32_t actualDepth;
+               uint32_t actualSize;
+            } config;
+            struct
+            {
+               uint32_t numberRead;
+               uint32_t numberRemaining;
+            } read;
+            struct
+            {
+               uint32_t numberRemaining;
+            } write;
+            struct
+            {
+               union
+               {
+                  void*    pointer;
+                  uint64_t _64BitField;
+               } elements;
+            } wait;
+         } op;
+      } fifo;
+
+      struct
+      {
+        union
+         {
+            union
+            {
+               uint64_t value64;
+               uint32_t value32;
+               uint16_t value16;
+               uint8_t  value8;
+            } value;
+            union
+            {
+               void*    memoryMappedAddress;
+               uint64_t _64BitField;
+            } memoryMappedIoWindow;
+            union
+            {
+               uint32_t   size;
+            } memoryMappedIoWindowSize;
+         };
+      } io;
+
+      uint32_t stringLength;
+
+      struct
+      {
+         uint32_t reserved_field_1_0;
+      } reserved_field_1;
+
+   } params;
+
+   uint32_t    outbufByteLen;
+
+   union
+   {
+      void*    pointer;
+      uint64_t _64BitField;
+   } outbuf;
+};
+
+static inline void init_syncop_out_params(nirio_syncop_out_params_t& param, void* buf, uint32_t len)
+{
+   param.outbuf._64BitField = 0;
+   param.outbuf.pointer = buf;
+   param.outbufByteLen = len;
+}
+
+
+
+//Device handle definition
+#if defined(UHD_PLATFORM_LINUX)
+    typedef int rio_dev_handle_t;
+#elif defined(UHD_PLATFORM_WIN32)
+    typedef HANDLE rio_dev_handle_t;
+#elif defined(UHD_PLATFORM_MACOS) || defined(UHD_PLATFORM_BSD)
+    typedef io_connect_t rio_dev_handle_t;
+#else
+    #error OS not supported by nirio_driver_iface.
+#endif
+static const rio_dev_handle_t INVALID_RIO_HANDLE = ((rio_dev_handle_t)-1);
+
+//Memory mapping container definition
+#if defined(UHD_PLATFORM_LINUX)
+    struct rio_mmap_t {
+        rio_mmap_t() : addr(NULL), size(0) {}
+        void *addr;
+        size_t size;
+
+        bool is_null() { return (size == 0 || addr == NULL); }
+    };
+#elif defined(UHD_PLATFORM_WIN32)
+    enum access_mode_t {
+       ACCESS_MODE_READ,
+       ACCESS_MODE_WRITE
+    };
+
+    struct rio_mmap_params_t
+    {
+       uint64_t mapped_va_ptr;
+       uint64_t map_ready_event_handle;
+       uint32_t size;
+       uint16_t memoryType;
+       uint8_t access_mode;
+    };
+
+    struct rio_mmap_threadargs_t
+    {
+        rio_dev_handle_t device_handle;
+        rio_mmap_params_t params;
+        nirio_status status;
+    };
+
+    struct rio_mmap_t
+    {
+        rio_mmap_t() : addr(NULL) {}
+        void *addr;
+        HANDLE map_thread_handle;
+        rio_mmap_threadargs_t map_thread_args;
+
+        bool is_null() { return addr == NULL; }
+    };
+#elif defined(UHD_PLATFORM_MACOS) || defined(UHD_PLATFORM_BSD)
+     struct rio_mmap_t {
+         rio_mmap_t() : addr(NULL) {}
+         void *addr;
+
+         bool is_null() { return addr == NULL; }
+     };
+#else
+    #error OS not supported by nirio_driver_iface.
+#endif
+
+    nirio_status rio_open(
+        const std::string& device_path,
+        rio_dev_handle_t& device_handle);
+
+    void rio_close(
+        rio_dev_handle_t& device_handle);
+
+    bool rio_isopen(
+        rio_dev_handle_t device_handle);
+
+    nirio_status rio_ioctl(
+        rio_dev_handle_t device_handle,
+        uint32_t ioctl_code,
+        const void *write_buf,
+        size_t write_buf_len,
+        void *read_buf,
+        size_t read_buf_len);
+
+    nirio_status rio_mmap(
+        rio_dev_handle_t device_handle,
+        uint16_t memory_type,
+        size_t size,
+        bool writable,
+        rio_mmap_t &map);
+
+    nirio_status rio_munmap(
+        rio_mmap_t &map);
+}
+
+#endif
diff --git a/host/include/uhd/transport/nirio/nirio_err_template.h b/host/include/uhd/transport/nirio/nirio_err_template.h
new file mode 100644
index 000000000..9235c0384
--- /dev/null
+++ b/host/include/uhd/transport/nirio/nirio_err_template.h
@@ -0,0 +1,66 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+/*
+ * NIRIO_ERR_INFO is undefined on purpose.
+ * This header is designed to be included with a custom definition of NIRIO_ERR_INFO
+ * To "generate" code in multiple files. This prevents duplication of code.
+ */
+
+NIRIO_ERR_INFO(NiRio_Status_Success, 0, "No errors or warnings.")
+NIRIO_ERR_INFO(NiRio_Status_FifoTimeout, -50400, "The timeout expired before the FIFO operation could complete.")
+NIRIO_ERR_INFO(NiRio_Status_MemoryFull, -52000, "A memory allocation failed. Try again after rebooting.")
+NIRIO_ERR_INFO(NiRio_Status_SoftwareFault, -52003, "An unexpected software error occurred.")
+NIRIO_ERR_INFO(NiRio_Status_InvalidParameter, -52005, "A parameter to a function was not valid. This could be a NULL pointer, a bad value, etc.")
+NIRIO_ERR_INFO(NiRio_Status_ResourceNotFound, -52006, "A required resource was not found. The NiFpga.* library, the RIO resource, or some other resource may be missing.")
+NIRIO_ERR_INFO(NiRio_Status_ResourceNotInitialized, -52010, "A required resource was not properly initialized. This could occur if NiFpga_Initialize was not called or a required NiFpga_IrqContext was not reserved.")
+NIRIO_ERR_INFO(NiRio_Status_FpgaAlreadyRunning, -61003, "The FPGA is already running.")
+NIRIO_ERR_INFO(NiRio_Status_DeviceTypeMismatch, -61024, "The bitfile was not compiled for the specified resource's device type.")
+NIRIO_ERR_INFO(NiRio_Status_CommunicationTimeout, -61046, "An error was detected in the communication between the host computer and the USRP device. This could be due to a hardware failure on the bus.")
+NIRIO_ERR_INFO(NiRio_Status_IrqTimeout, -61060, "The timeout expired before any of the IRQs were asserted.")
+NIRIO_ERR_INFO(NiRio_Status_CorruptBitfile, -61070, "The LVBITX configuration bitstream seems to be corrupt.")
+NIRIO_ERR_INFO(NiRio_Status_BadDepth, -61072, "The requested FIFO depth is invalid. It is either 0 or an amount not supported by the hardware.")
+NIRIO_ERR_INFO(NiRio_Status_BadReadWriteCount, -61073, "The number of FIFO elements is invalid. Either the number is greater than the depth of the host memory DMA FIFO, or more elements were requested for release than had been acquired.")
+NIRIO_ERR_INFO(NiRio_Status_ClockLostLock, -61083, "A hardware clocking error occurred.")
+NIRIO_ERR_INFO(NiRio_Status_FpgaBusy, -61141, "The operation could not be performed because the FPGA is busy.")
+NIRIO_ERR_INFO(NiRio_Status_FpgaBusyFpgaInterfaceCApi, -61200, "The operation could not be performed because the FPGA is busy.")
+NIRIO_ERR_INFO(NiRio_Status_FpgaBusyScanInterface, -61201, "The operation could not be performed because the chassis is in Scan Interface programming mode.")
+NIRIO_ERR_INFO(NiRio_Status_FpgaBusyFpgaInterface, -61202, "The operation could not be performed because the FPGA is busy operating in FPGA Interface mode. Stop all activities on the FPGA before requesting this operation.")
+NIRIO_ERR_INFO(NiRio_Status_FpgaBusyInteractive, -61203, "The operation could not be performed because the FPGA is busy operating in FPGA Interactive mode. Stop all activities on the FPGA before requesting this operation.")
+NIRIO_ERR_INFO(NiRio_Status_FpgaBusyEmulation, -61204, "The operation could not be performed because the FPGA is busy operating in FPGA Emulation mode. Stop all activities on the FPGA before requesting this operation.")
+NIRIO_ERR_INFO(NiRio_Status_GatedClockHandshakingViolation, -61216, "A gated clock has violated the handshaking protocol.")
+NIRIO_ERR_INFO(NiRio_Status_RegionsOutstandingForSession, -61217, "A session cannot be closed, reset, nor can a bitfile be downloaded while DMA FIFO region references are still outstanding for the specified session.")
+NIRIO_ERR_INFO(NiRio_Status_ElementsNotPermissibleToBeAcquired, -61219, "There are currently fewer unacquired elements left in the FIFO than are being requested. Release some acquired elements before acquiring more elements.")
+NIRIO_ERR_INFO(NiRio_Status_InternalError, -61499, "An unexpected internal error occurred.")
+NIRIO_ERR_INFO(NiRio_Status_AccessDenied, -63033, "Access to the local or remote system was denied.")
+NIRIO_ERR_INFO(NiRio_Status_RpcConnectionError, -63040, "A connection could not be established to the specified remote device manager. Ensure that the devices are on, that NI-USRPRIO software is installed, and that the USRPRIO server is running and properly configured.")
+NIRIO_ERR_INFO(NiRio_Status_RpcOperationError, -63042, "A fault on the network caused the RPC operation to fail.")
+NIRIO_ERR_INFO(NiRio_Status_RpcSessionError, -63043, "The RPC session to the remote device manager is invalid. Ensure that the device is connected and try restarting the server.")
+NIRIO_ERR_INFO(NiRio_Status_FifoReserved, -63082, "The operation could not complete because another session is accessing the FIFO. Close the other session and retry.")
+NIRIO_ERR_INFO(NiRio_Status_FifoElementsCurrentlyAcquired, -63083, "A Configure FIFO, Stop FIFO, Read FIFO, or Write FIFO function was called while the host had acquired elements of the FIFO. Release all acquired elements before configuring, stopping, reading, or writing.")
+NIRIO_ERR_INFO(NiRio_Status_MisalignedAccess, -63084, "A function was called using a misaligned address. The address must be a multiple of the size of the datatype.")
+NIRIO_ERR_INFO(NiRio_Status_BitfileReadError, -63101, "A valid .lvbitx bitfile is required. If you are using a valid .lvbitx bitfile, the bitfile may not be compatible with the software you are using.")
+NIRIO_ERR_INFO(NiRio_Status_SignatureMismatch, -63106, "The specified signature does not match the signature of the bitfile. If the bitfile has been recompiled, regenerate the C API and rebuild the application.")
+NIRIO_ERR_INFO(NiRio_Status_IncompatibleBitfile, -63107, "The bitfile you are trying to use is not compatible with the version of NI-RIO installed on the target and/or the host.")
+NIRIO_ERR_INFO(NiRio_Status_InvalidResourceName, -63192, "Either the supplied resource name is invalid as a RIO resource name, or the device was not found.")
+NIRIO_ERR_INFO(NiRio_Status_FeatureNotSupported, -63193, "The requested feature is not supported.")
+NIRIO_ERR_INFO(NiRio_Status_VersionMismatch, -63194, "Software version mismatch.")
+NIRIO_ERR_INFO(NiRio_Status_InvalidSession, -63195, "The session is invalid or has been closed.")
+NIRIO_ERR_INFO(NiRio_Status_OutOfHandles, -63198, "The maximum number of open FPGA sessions has been reached. Close some open sessions.")
+NIRIO_ERR_INFO(NiRio_Status_DeviceLocked, -63031, "The operation is not allowed because another session in a different process is accessing the device. Close all other sessions and retry.")
+
+
diff --git a/host/include/uhd/transport/nirio/nirio_fifo.h b/host/include/uhd/transport/nirio/nirio_fifo.h
new file mode 100644
index 000000000..f7abb396f
--- /dev/null
+++ b/host/include/uhd/transport/nirio/nirio_fifo.h
@@ -0,0 +1,132 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_FIFO_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_FIFO_H
+
+#include <uhd/transport/nirio/nirio_driver_iface.h>
+#include <uhd/transport/nirio/niriok_proxy.h>
+#include <uhd/transport/nirio/status.h>
+#include <boost/noncopyable.hpp>
+#include <boost/smart_ptr.hpp>
+#include <string>
+#include <boost/thread/recursive_mutex.hpp>
+#include <boost/thread/thread.hpp>
+
+namespace uhd { namespace niusrprio {
+
+enum fifo_direction_t {
+    INPUT_FIFO,
+    OUTPUT_FIFO
+};
+
+enum nirio_scalar_t {
+   SCALAR_I8  = 1UL,
+   SCALAR_I16 = 2UL,
+   SCALAR_I32 = 3UL,
+   SCALAR_I64 = 4UL,
+   SCALAR_U8  = 5UL,
+   SCALAR_U16 = 6UL,
+   SCALAR_U32 = 7UL,
+   SCALAR_U64 = 8UL
+};
+
+struct datatype_info_t {
+    datatype_info_t(nirio_scalar_t t, uint32_t w):scalar_type(t),width(w) {}
+    nirio_scalar_t     scalar_type;
+    uint32_t        width;
+};
+
+template <typename data_t>
+class nirio_fifo : private boost::noncopyable
+{
+public:
+    typedef boost::shared_ptr< nirio_fifo<data_t> > sptr;
+
+    nirio_fifo(
+        niriok_proxy& riok_proxy,
+        fifo_direction_t direction,
+        const std::string& name,
+        uint32_t fifo_instance);
+    virtual ~nirio_fifo();
+
+    nirio_status initialize(
+        const size_t requested_depth,
+        size_t& actual_depth,
+        size_t& actual_size);
+
+    void finalize();
+
+    inline const std::string& get_name() const { return _name; }
+    inline uint32_t get_channel() const { return _fifo_channel; }
+    inline uint32_t get_direction() const { return _fifo_direction; }
+    inline uint32_t get_scalar_type() const { return _datatype_info.scalar_type; }
+
+    nirio_status start();
+
+    nirio_status stop();
+
+    nirio_status acquire(
+        data_t*& elements,
+        const size_t elements_requested,
+        const uint32_t timeout,
+        size_t& elements_acquired,
+        size_t& elements_remaining);
+
+    nirio_status release(const size_t elements);
+
+    nirio_status read(
+        data_t* buf,
+        const uint32_t num_elements,
+        uint32_t timeout,
+        uint32_t& num_read,
+        uint32_t& num_remaining);
+
+    nirio_status write(
+        const data_t* buf,
+        const uint32_t num_elements,
+        uint32_t timeout,
+        uint32_t& num_remaining);
+
+private:    //Methods
+    bool _is_initialized();
+    datatype_info_t _get_datatype_info();
+    nirio_status _get_transfer_count(uint64_t& transfer_count);
+    nirio_status _ensure_transfer_completed(uint32_t timeout_ms);
+
+private:    //Members
+    std::string                    _name;
+    fifo_direction_t               _fifo_direction;
+    uint32_t                       _fifo_channel;
+    datatype_info_t                _datatype_info;
+    size_t                         _acquired_pending;
+    nirio_driver_iface::rio_mmap_t _mem_map;
+    boost::recursive_mutex         _mutex;
+    niriok_proxy*                  _riok_proxy_ptr;
+
+    uint64_t                       _expected_xfer_count;
+    uint32_t                       _dma_base_addr;
+
+    static const uint32_t FIFO_LOCK_TIMEOUT_IN_MS = 5000;
+};
+
+#include "nirio_fifo.ipp"
+
+}}
+
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_FIFO_H */
diff --git a/host/include/uhd/transport/nirio/nirio_fifo.ipp b/host/include/uhd/transport/nirio/nirio_fifo.ipp
new file mode 100644
index 000000000..80a0c2a89
--- /dev/null
+++ b/host/include/uhd/transport/nirio/nirio_fifo.ipp
@@ -0,0 +1,378 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifdef __clang__
+    #pragma GCC diagnostic push ignored "-Wmissing-field-initializers"
+#elif defined(__GNUC__)
+    #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+template <typename data_t>
+nirio_fifo<data_t>::nirio_fifo(
+    niriok_proxy& riok_proxy,
+    fifo_direction_t direction,
+    const std::string& name,
+    uint32_t fifo_instance) :
+    _name(name),
+    _fifo_direction(direction),
+    _fifo_channel(fifo_instance),
+    _datatype_info(_get_datatype_info()),
+    _acquired_pending(0),
+    _mem_map(),
+    _riok_proxy_ptr(&riok_proxy),
+    _expected_xfer_count(0),
+    _dma_base_addr(0)
+{
+    nirio_status status = 0;
+    nirio_status_chain(_riok_proxy_ptr->set_attribute(ADDRESS_SPACE, BUS_INTERFACE), status);
+    uint32_t base_addr, addr_space_word;
+    nirio_status_chain(_riok_proxy_ptr->peek(0x1C, base_addr), status);
+    nirio_status_chain(_riok_proxy_ptr->peek(0xC, addr_space_word), status);
+    _dma_base_addr = base_addr + (_fifo_channel * (1<<((addr_space_word>>16)&0xF)));
+}
+
+template <typename data_t>
+nirio_fifo<data_t>::~nirio_fifo()
+{
+    finalize();
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::initialize(
+    const size_t requested_depth,
+    size_t& actual_depth,
+    size_t& actual_size)
+{
+    nirio_status status = NiRio_Status_Success;
+    if (!_riok_proxy_ptr) return NiRio_Status_ResourceNotInitialized;
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+    //Forcefully stop the fifo if it is running
+    in.function    = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::STOP;
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+
+    in.function = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::CONFIGURE;
+
+    in.params.fifo.channel = _fifo_channel;
+    in.params.fifo.op.config.requestedDepth = static_cast<uint32_t>(requested_depth);
+    in.params.fifo.op.config.requiresActuals = 1;
+
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+    if (nirio_status_fatal(status)) return status;
+
+    actual_depth = out.params.fifo.op.config.actualDepth;
+    actual_size = out.params.fifo.op.config.actualSize;
+
+    status = _riok_proxy_ptr->map_fifo_memory(_fifo_channel, actual_size, _mem_map);
+    return status;
+}
+
+template <typename data_t>
+void nirio_fifo<data_t>::finalize()
+{
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+    if (!_mem_map.is_null()) {
+        stop();
+        _riok_proxy_ptr->unmap_fifo_memory(_mem_map);
+    }
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::start()
+{
+    nirio_status status = NiRio_Status_Success;
+    if (!_riok_proxy_ptr) return NiRio_Status_ResourceNotInitialized;
+
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+    in.function    = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::START;
+
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+    if (nirio_status_not_fatal(status)) {
+        _acquired_pending = 0;
+        _expected_xfer_count = 0;
+    }
+    return status;
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::stop()
+{
+    nirio_status status = NiRio_Status_Success;
+    if (!_riok_proxy_ptr) return NiRio_Status_ResourceNotInitialized;
+
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+    if (_acquired_pending > 0) release(_acquired_pending);
+
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+    in.function    = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::STOP;
+
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+
+    return status;
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::acquire(
+    data_t*& elements,
+    const size_t elements_requested,
+    const uint32_t timeout,
+    size_t& elements_acquired,
+    size_t& elements_remaining)
+{
+    nirio_status status = NiRio_Status_Success;
+    if (!_riok_proxy_ptr || _mem_map.is_null()) return NiRio_Status_ResourceNotInitialized;
+
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    uint32_t stuffed[2];
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+    init_syncop_out_params(out, stuffed, sizeof(stuffed));
+
+    in.function    = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::WAIT;
+
+    in.params.fifo.channel                   = _fifo_channel;
+    in.params.fifo.op.wait.elementsRequested = static_cast<uint32_t>(elements_requested);
+    in.params.fifo.op.wait.scalarType        = static_cast<uint32_t>(_datatype_info.scalar_type);
+    in.params.fifo.op.wait.bitWidth          = _datatype_info.width * 8;
+    in.params.fifo.op.wait.output            = _fifo_direction == OUTPUT_FIFO;
+    in.params.fifo.op.wait.timeout           = timeout;
+
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+
+    if (nirio_status_not_fatal(status)) {
+        elements = static_cast<data_t*>(out.params.fifo.op.wait.elements.pointer);
+        elements_acquired = stuffed[0];
+        elements_remaining = stuffed[1];
+        _acquired_pending = elements_acquired;
+
+        if (UHD_NIRIO_RX_FIFO_XFER_CHECK_EN &&
+            _riok_proxy_ptr->get_rio_quirks().rx_fifo_xfer_check_en() &&
+            get_direction() == INPUT_FIFO
+        ) {
+            _expected_xfer_count += static_cast<uint64_t>(elements_requested * sizeof(data_t));
+            status = _ensure_transfer_completed(timeout);
+        }
+    }
+
+    return status;
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::release(const size_t elements)
+{
+    nirio_status status = NiRio_Status_Success;
+    if (!_riok_proxy_ptr) return NiRio_Status_ResourceNotInitialized;
+
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+    in.function    = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::GRANT;
+
+    in.params.fifo.channel           = _fifo_channel;
+    in.params.fifo.op.grant.elements = static_cast<uint32_t>(elements);
+
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+    _acquired_pending = 0;
+
+    return status;
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::read(
+    data_t* buf,
+    const uint32_t num_elements,
+    uint32_t timeout,
+    uint32_t& num_read,
+    uint32_t& num_remaining)
+{
+    nirio_status status = NiRio_Status_Success;
+    if (!_riok_proxy_ptr) return NiRio_Status_ResourceNotInitialized;
+
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+    init_syncop_out_params(out, buf, num_elements * _datatype_info.width);
+
+    in.function = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::READ;
+
+    in.params.fifo.channel = _fifo_channel;
+    in.params.fifo.op.readWithDataType.timeout = timeout;
+    in.params.fifo.op.readWithDataType.scalarType = static_cast<uint32_t>(_datatype_info.scalar_type);
+    in.params.fifo.op.readWithDataType.bitWidth = _datatype_info.width * 8;
+
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+
+    if (nirio_status_not_fatal(status) || status == NiRio_Status_FifoTimeout) {
+        num_read = out.params.fifo.op.read.numberRead;
+        num_remaining = out.params.fifo.op.read.numberRemaining;
+    }
+
+    return status;
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::write(
+    const data_t* buf,
+    const uint32_t num_elements,
+    uint32_t timeout,
+    uint32_t& num_remaining)
+{
+    nirio_status status = NiRio_Status_Success;
+    if (!_riok_proxy_ptr) return NiRio_Status_ResourceNotInitialized;
+
+    boost::unique_lock<boost::recursive_mutex> lock(_mutex);
+
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    init_syncop_in_params(in, buf, num_elements * _datatype_info.width);
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+    in.function = nirio_driver_iface::NIRIO_FUNC::FIFO;
+    in.subfunction = nirio_driver_iface::NIRIO_FIFO::WRITE;
+
+    in.params.fifo.channel = _fifo_channel;
+    in.params.fifo.op.writeWithDataType.timeout = timeout;
+    in.params.fifo.op.readWithDataType.scalarType = static_cast<uint32_t>(_datatype_info.scalar_type);
+    in.params.fifo.op.readWithDataType.bitWidth = _datatype_info.width * 8;
+
+    status = _riok_proxy_ptr->sync_operation(&in, sizeof(in), &out, sizeof(out));
+
+    if (nirio_status_not_fatal(status) || status == NiRio_Status_FifoTimeout) {
+        num_remaining = out.params.fifo.op.write.numberRemaining;
+    }
+
+    return status;
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::_get_transfer_count(uint64_t& transfer_count)
+{
+    //_riok_proxy_ptr must be valid and _mutex must be locked
+
+    nirio_status status = NiRio_Status_Success;
+    uint32_t lower_half = 0, upper_half = 0;
+    nirio_status_chain(_riok_proxy_ptr->peek(_dma_base_addr + 0xA8, lower_half), status);  //Latches both halves
+    nirio_status_chain(_riok_proxy_ptr->peek(_dma_base_addr + 0xAC, upper_half), status);
+
+    if (nirio_status_not_fatal(status)) {
+        transfer_count = lower_half | (((uint64_t)upper_half) << 32);
+    }
+    return status;
+}
+
+template <typename data_t>
+nirio_status nirio_fifo<data_t>::_ensure_transfer_completed(uint32_t timeout_ms)
+{
+    //_riok_proxy_ptr must be valid and _mutex must be locked
+
+    static const size_t MIN_TIMEOUT_IN_US = 2000;
+
+    nirio_status status = NiRio_Status_Success;
+    uint64_t actual_xfer_count = 0;
+    nirio_status_chain(_get_transfer_count(actual_xfer_count), status);
+
+    //We count the elapsed time using a simple counter instead of the high
+    //resolution timebase for efficieny reasons. The call to fetch the time
+    //requires a user-kernel transition which has a large overhead compared
+    //to a simple mem read. As a tradeoff, we deal with a less precise timeout.
+    size_t approx_us_elapsed = 0;
+    while (
+        nirio_status_not_fatal(status) &&
+        (_expected_xfer_count > actual_xfer_count) &&
+        approx_us_elapsed++ < std::max<size_t>(MIN_TIMEOUT_IN_US, timeout_ms * 1000)
+    ) {
+        boost::this_thread::sleep(boost::posix_time::microseconds(1));
+        nirio_status_chain(_get_transfer_count(actual_xfer_count), status);
+    }
+
+    if (_expected_xfer_count > actual_xfer_count) {
+        nirio_status_chain(NiRio_Status_CommunicationTimeout, status);
+    }
+
+    return status;
+}
+
+template <>
+inline datatype_info_t nirio_fifo<int8_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_I8, 1);
+}
+
+template <>
+inline datatype_info_t nirio_fifo<int16_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_I16, 2);
+}
+
+template <>
+inline datatype_info_t nirio_fifo<int32_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_I32, 4);
+}
+
+template <>
+inline datatype_info_t nirio_fifo<int64_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_I64, 8);
+}
+
+template <>
+inline datatype_info_t nirio_fifo<uint8_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_U8, 1);
+}
+
+template <>
+inline datatype_info_t nirio_fifo<uint16_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_U16, 2);
+}
+
+template <>
+inline datatype_info_t nirio_fifo<uint32_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_U32, 4);
+}
+
+template <>
+inline datatype_info_t nirio_fifo<uint64_t>::_get_datatype_info()
+{
+    return datatype_info_t(SCALAR_U64, 8);
+}
+
+#ifdef __GNUC__
+    #pragma GCC diagnostic pop
+#endif
diff --git a/host/include/uhd/transport/nirio/nirio_quirks.h b/host/include/uhd/transport/nirio/nirio_quirks.h
new file mode 100644
index 000000000..326eeeb8c
--- /dev/null
+++ b/host/include/uhd/transport/nirio/nirio_quirks.h
@@ -0,0 +1,78 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_QUIRKS_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_QUIRKS_H
+
+#include <set>
+#include <uhd/utils/log.hpp>
+
+//Quirk#1: We need to verify RX zero-copy data transfers from the RIO
+//         driver if we are in full duplex mode.
+//         This option allows disabling this quirk by compiling it out.
+#define UHD_NIRIO_RX_FIFO_XFER_CHECK_EN 1
+
+namespace uhd { namespace niusrprio {
+
+class nirio_quirks {
+public:
+    nirio_quirks() : _tx_stream_count(0) {
+    }
+
+    UHD_INLINE void register_tx_streams(const uint32_t tx_stream_indices[]) {
+        for (size_t i = 0; i < sizeof(tx_stream_indices)/sizeof(*tx_stream_indices); i++) {
+            _tx_stream_fifo_indices.insert(tx_stream_indices[i]);
+        }
+    }
+
+    UHD_INLINE void add_tx_fifo(uint32_t index) {
+        if (_tx_stream_fifo_indices.find(index) != _tx_stream_fifo_indices.end()) {
+            if (_tx_stream_count == 0) {
+                UHD_LOG << "NI-RIO RX FIFO Transfer Check Quirk Enabled.";
+            }
+            _tx_stream_count++;
+        }
+    }
+
+    UHD_INLINE void remove_tx_fifo(uint32_t index) {
+        if (_tx_stream_fifo_indices.find(index) != _tx_stream_fifo_indices.end()) {
+            _tx_stream_count--;
+            if (_tx_stream_count == 0) {
+                UHD_LOG << "NI-RIO RX FIFO Transfer Check Quirk Disabled.";
+            }
+        }
+    }
+
+    //Quirk#1: We need to verify RX zero-copy data transfers from the RIO
+    //         driver if we are in full duplex mode.
+    //         This function returns true if the quirk is enabled for the
+    //         current uhd_device configuration (dynamic)
+    UHD_INLINE bool rx_fifo_xfer_check_en() const {
+        //This function must be as fast as possible because it is in a high
+        //throughput data path
+        return _tx_stream_count > 0;
+    }
+
+private:
+    std::set<uint32_t>  _tx_stream_fifo_indices;
+    size_t              _tx_stream_count;
+};
+
+}}
+
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_QUIRKS_H */
diff --git a/host/include/uhd/transport/nirio/nirio_resource_manager.h b/host/include/uhd/transport/nirio/nirio_resource_manager.h
new file mode 100644
index 000000000..a10b3d532
--- /dev/null
+++ b/host/include/uhd/transport/nirio/nirio_resource_manager.h
@@ -0,0 +1,145 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_RESOURCE_MANAGER_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_RESOURCE_MANAGER_H
+
+#include <uhd/transport/nirio/nirio_fifo.h>
+#include <uhd/transport/nirio/niriok_proxy.h>
+#include <vector>
+#include <map>
+#include <string>
+
+namespace uhd { namespace niusrprio
+{
+enum register_direction_t {
+    CONTROL,
+    INDICATOR
+};
+
+struct nirio_register_info_t {
+    nirio_register_info_t(
+        uint32_t                 arg_offset,
+        const char*             arg_name,
+        register_direction_t    arg_direction) :
+            offset(arg_offset),
+            name(arg_name),
+            direction(arg_direction)
+    {}
+
+    uint32_t                 offset;
+    std::string                name;
+    register_direction_t    direction;
+};
+
+typedef std::vector<nirio_register_info_t> nirio_register_info_vtr;
+
+struct nirio_fifo_info_t {
+    nirio_fifo_info_t(
+        uint32_t             arg_channel,
+        const char*         arg_name,
+        fifo_direction_t    arg_direction,
+        uint32_t             arg_base_addr,
+        uint32_t             arg_depth,
+        nirio_scalar_t         arg_scalar_type,
+        uint32_t            arg_width,
+        uint32_t             arg_version) :
+            channel(arg_channel),
+            name(arg_name),
+            direction(arg_direction),
+            base_addr(arg_base_addr),
+            depth(arg_depth),
+            scalar_type(arg_scalar_type),
+            width(arg_width),
+            version(arg_version)
+    {}
+
+    uint32_t             channel;
+    std::string            name;
+    fifo_direction_t    direction;
+    uint32_t             base_addr;
+    uint32_t             depth;
+    nirio_scalar_t         scalar_type;
+    uint32_t            width;
+    uint32_t             version;
+};
+
+typedef std::vector<nirio_fifo_info_t> nirio_fifo_info_vtr;
+
+
+class nirio_resource_manager
+{
+public:
+    nirio_resource_manager(niriok_proxy& proxy);
+    virtual ~nirio_resource_manager();
+
+    nirio_status initialize(const nirio_register_info_vtr& reg_info_vtr, const nirio_fifo_info_vtr& fifo_info_vtr);
+    void finalize();
+
+    nirio_status get_register_offset(const char* register_name, uint32_t& offset);
+
+    template<typename data_t>
+    nirio_status create_tx_fifo(const char* fifo_name, boost::shared_ptr< nirio_fifo<data_t> >& fifo)
+    {
+        nirio_fifo_info_t* fifo_info_ptr = _lookup_fifo_info(fifo_name);
+        if (fifo_info_ptr) {
+            fifo.reset(new nirio_fifo<data_t>(_kernel_proxy, OUTPUT_FIFO, fifo_info_ptr->name, fifo_info_ptr->channel));
+        } else {
+            return NiRio_Status_ResourceNotFound;
+        }
+
+        if (fifo->get_channel() != fifo_info_ptr->channel) return NiRio_Status_InvalidParameter;
+        if (fifo->get_scalar_type() != fifo_info_ptr->scalar_type) return NiRio_Status_InvalidParameter;
+
+        return NiRio_Status_Success;
+    }
+
+    template<typename data_t>
+    nirio_status create_rx_fifo(const char* fifo_name, boost::shared_ptr< nirio_fifo<data_t> >& fifo)
+    {
+        nirio_fifo_info_t* fifo_info_ptr = _lookup_fifo_info(fifo_name);
+        if (fifo_info_ptr) {
+            fifo.reset(new nirio_fifo<data_t>(_kernel_proxy, INPUT_FIFO, fifo_info_ptr->name, fifo_info_ptr->channel));
+        } else {
+            return NiRio_Status_ResourceNotFound;
+        }
+
+        if (fifo->get_channel() != fifo_info_ptr->channel) return NiRio_Status_InvalidParameter;
+        if (fifo->get_scalar_type() != fifo_info_ptr->scalar_type) return NiRio_Status_InvalidParameter;
+
+        return NiRio_Status_Success;
+    }
+
+private:
+    nirio_resource_manager (const nirio_resource_manager&);
+    nirio_resource_manager& operator = (const nirio_resource_manager&);
+
+    typedef std::map<const std::string, nirio_fifo_info_t> fifo_info_map_t;
+    typedef std::map<const std::string, nirio_register_info_t> register_info_map_t;
+
+    nirio_status _add_fifo_resource(const nirio_fifo_info_t& fifo_info);
+    nirio_status _set_driver_config();
+    nirio_fifo_info_t* _lookup_fifo_info(const char* fifo_name);
+
+    niriok_proxy&           _kernel_proxy;
+    fifo_info_map_t            _fifo_info_map;
+    register_info_map_t        _reg_info_map;
+};
+
+}}
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_RESOURCE_MANAGER_H */
diff --git a/host/include/uhd/transport/nirio/niriok_proxy.h b/host/include/uhd/transport/nirio/niriok_proxy.h
new file mode 100644
index 000000000..a6b6183d1
--- /dev/null
+++ b/host/include/uhd/transport/nirio/niriok_proxy.h
@@ -0,0 +1,160 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_INTERFACE_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_INTERFACE_H
+
+#include <boost/smart_ptr.hpp>
+#include <boost/noncopyable.hpp>
+#include <uhd/transport/nirio/nirio_driver_iface.h>
+#include <uhd/transport/nirio/nirio_quirks.h>
+
+namespace uhd { namespace niusrprio
+{
+    enum nirio_version_t { CURRENT, OLDEST_COMPATIBLE };
+
+    enum nirio_device_attr_32_t {
+       INTERFACE_NUMBER              =  1UL,
+       PRODUCT_NUMBER                =  2UL,
+       VENDOR_NUMBER                 =  3UL,
+       SERIAL_NUMBER                 =  4UL,
+       BUS_NUMBER                    = 10UL,
+       DEVICE_NUMBER                 = 11UL,
+       FUNCTION_NUMBER               = 12UL,
+       CURRENT_VERSION               = 14UL,
+       OLDEST_COMPATIBLE_VERSION     = 15UL,
+       ADDRESS_SPACE                 = 25UL,
+       IS_FPGA_PROGRAMMED            = 48UL,
+       DEFAULT_FPGA_SIGNATURE_OFFSET = 53UL,
+       DEFAULT_FPGA_RESET_OFFSET     = 54UL,
+       DEFAULT_FPGA_RESET_SIZE       = 55UL,
+       DEFAULT_FPGA_CONTROL_OFFSET   = 56UL,
+       DEFAULT_FPGA_INTERRUPT_OFFSET = 57UL,
+    };
+
+    enum nirio_device_attr_str_t {
+       PRODUCT_NAME                  = 0UL,
+       FPGA_TARGET_CLASS             = 6UL,
+       SAVED_BITFILE                 = 7UL,
+    };
+
+    enum nirio_addr_space_t {
+       INVALID       = 0,
+       BUS_INTERFACE = 1,
+       FPGA          = 2,
+       BAR_WINDOW    = 3,
+    };
+
+
+    class UHD_API niriok_proxy : public boost::noncopyable {
+    public:
+        typedef boost::shared_ptr<niriok_proxy> sptr;
+
+        niriok_proxy();
+        virtual ~niriok_proxy();
+
+        //File operations
+        nirio_status open(const std::string& interface_path);
+        void close(void);
+
+        nirio_status reset();
+
+        inline uint32_t get_interface_num() { return _interface_num; }
+
+        nirio_status get_cached_session(
+            uint32_t& session);
+
+        nirio_status get_version(
+            nirio_version_t type,
+            uint32_t& major,
+            uint32_t& upgrade,
+            uint32_t& maintenance,
+            char& phase,
+            uint32_t& build);
+
+        nirio_status sync_operation(
+            const void *writeBuffer,
+            size_t writeBufferLength,
+            void *readBuffer,
+            size_t readBufferLength);
+
+        nirio_status get_attribute(
+            const nirio_device_attr_32_t attribute,
+            uint32_t& attrValue);
+
+        nirio_status get_attribute(
+            const nirio_device_attr_str_t  attribute,
+            char* buf,
+            const uint32_t bufLen,
+            uint32_t& stringLen);
+
+        nirio_status set_attribute(
+            const nirio_device_attr_32_t attribute,
+            const uint32_t value);
+
+        nirio_status set_attribute(
+            const nirio_device_attr_str_t attribute,
+            const char* const buffer);
+
+        nirio_status peek(uint32_t offset, uint32_t& value);
+
+        nirio_status peek(uint32_t offset, uint64_t& value);
+
+        nirio_status poke(uint32_t offset, const uint32_t& value);
+
+        nirio_status poke(uint32_t offset, const uint64_t& value);
+
+        nirio_status map_fifo_memory(
+            uint32_t fifo_instance,
+            size_t size,
+            nirio_driver_iface::rio_mmap_t& map);
+
+        nirio_status unmap_fifo_memory(
+            nirio_driver_iface::rio_mmap_t& map);
+
+        nirio_quirks& get_rio_quirks() {
+            return _rio_quirks;
+        }
+
+    private:    //Members
+        nirio_driver_iface::rio_dev_handle_t    _device_handle;
+        uint32_t                                _interface_num;
+        nirio_quirks                            _rio_quirks;
+    };
+
+    class niriok_scoped_addr_space : public boost::noncopyable {
+    public:
+        explicit niriok_scoped_addr_space(niriok_proxy& proxy, nirio_addr_space_t addr_space, nirio_status& status) :
+            driver_proxy(proxy)
+        {
+            cache_status = driver_proxy.get_attribute(ADDRESS_SPACE, cached_addr_space);
+            nirio_status_chain(driver_proxy.set_attribute(ADDRESS_SPACE, addr_space), status);
+        }
+
+        ~niriok_scoped_addr_space() {
+            if (nirio_status_not_fatal(cache_status))
+                driver_proxy.set_attribute(ADDRESS_SPACE, cached_addr_space);
+        }
+
+    private:
+        niriok_proxy& driver_proxy;
+        uint32_t cached_addr_space;
+        nirio_status cache_status;
+    };
+}}
+
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_NIRIO_INTERFACE_H */
diff --git a/host/include/uhd/transport/nirio/niusrprio_session.h b/host/include/uhd/transport/nirio/niusrprio_session.h
new file mode 100644
index 000000000..c9a61ae76
--- /dev/null
+++ b/host/include/uhd/transport/nirio/niusrprio_session.h
@@ -0,0 +1,125 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_NIUSRPRIO_SESSION_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_NIUSRPRIO_SESSION_H
+
+#include <uhd/transport/nirio/rpc/usrprio_rpc_client.hpp>
+#include <uhd/transport/nirio/niriok_proxy.h>
+#include <uhd/transport/nirio/nirio_resource_manager.h>
+#include <uhd/transport/nirio/nifpga_lvbitx.h>
+#include <boost/noncopyable.hpp>
+#include <boost/smart_ptr.hpp>
+#include <boost/thread/recursive_mutex.hpp>
+#include <string>
+
+namespace uhd { namespace niusrprio {
+
+class UHD_API niusrprio_session : private boost::noncopyable
+{
+public:
+    typedef boost::shared_ptr<niusrprio_session> sptr;
+    typedef uhd::usrprio_rpc::usrprio_device_info device_info;
+    typedef uhd::usrprio_rpc::usrprio_device_info_vtr device_info_vtr;
+
+	static nirio_status enumerate(
+        const std::string& rpc_port_name,
+        device_info_vtr& device_info_vtr);
+
+	niusrprio_session(
+        const std::string& resource_name,
+        const std::string& port_name);
+	virtual ~niusrprio_session();
+
+	nirio_status open(
+        nifpga_lvbitx::sptr lvbitx,
+        bool force_download = false);
+
+	void close(bool skip_reset = false);
+
+	nirio_status reset();
+
+	template<typename data_t>
+	nirio_status create_tx_fifo(
+		const char* fifo_name,
+		boost::shared_ptr< nirio_fifo<data_t> >& fifo)
+	{
+        if (!_session_open) return NiRio_Status_ResourceNotInitialized;
+        return _resource_manager.create_tx_fifo(fifo_name, fifo);
+	}
+
+    template<typename data_t>
+    nirio_status create_tx_fifo(
+        uint32_t fifo_instance,
+        boost::shared_ptr< nirio_fifo<data_t> >& fifo)
+    {
+        if ((size_t)fifo_instance >= _lvbitx->get_output_fifo_count()) return NiRio_Status_InvalidParameter;
+        return create_tx_fifo(_lvbitx->get_output_fifo_names()[fifo_instance], fifo);
+    }
+
+    template<typename data_t>
+	nirio_status create_rx_fifo(
+		const char* fifo_name,
+		boost::shared_ptr< nirio_fifo<data_t> >& fifo)
+	{
+        if (!_session_open) return NiRio_Status_ResourceNotInitialized;
+        return _resource_manager.create_rx_fifo(fifo_name, fifo);
+	}
+
+    template<typename data_t>
+    nirio_status create_rx_fifo(
+        uint32_t fifo_instance,
+        boost::shared_ptr< nirio_fifo<data_t> >& fifo)
+    {
+        if ((size_t)fifo_instance >= _lvbitx->get_input_fifo_count()) return NiRio_Status_InvalidParameter;
+        return create_rx_fifo(_lvbitx->get_input_fifo_names()[fifo_instance], fifo);
+    }
+
+	niriok_proxy& get_kernel_proxy() {
+	    return _riok_proxy;
+	}
+
+    nirio_status download_bitstream_to_flash(const std::string& bitstream_path);
+
+    //Static
+    static niriok_proxy::sptr create_kernel_proxy(
+        const std::string& resource_name,
+        const std::string& rpc_port_name);
+
+private:
+	nirio_status _verify_signature();
+	std::string _read_bitstream_checksum();
+	nirio_status _write_bitstream_checksum(const std::string& checksum);
+	nirio_status _wait_for_device_available();
+
+	std::string								_resource_name;
+	nifpga_lvbitx::sptr                     _lvbitx;
+    std::string                             _interface_path;
+    bool                                    _session_open;
+	niriok_proxy			                _riok_proxy;
+	nirio_resource_manager	                _resource_manager;
+    usrprio_rpc::usrprio_rpc_client         _rpc_client;
+	boost::recursive_mutex                  _session_mutex;
+
+	static const uint32_t SESSION_LOCK_TIMEOUT_IN_MS    = 3000;
+    static const uint32_t SESSION_LOCK_RETRY_INT_IN_MS  = 500;
+};
+
+}}
+
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_NIUSRPRIO_SESSION_H */
diff --git a/host/include/uhd/transport/nirio/rpc/rpc_client.hpp b/host/include/uhd/transport/nirio/rpc/rpc_client.hpp
new file mode 100644
index 000000000..f90034e37
--- /dev/null
+++ b/host/include/uhd/transport/nirio/rpc/rpc_client.hpp
@@ -0,0 +1,94 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_RPC_CLIENT_HPP
+#define INCLUDED_RPC_CLIENT_HPP
+
+#include <boost/asio.hpp>
+#include <boost/smart_ptr.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/thread/condition_variable.hpp>
+#include "rpc_common.hpp"
+#include <uhd/utils/log.hpp>
+
+namespace uhd { namespace usrprio_rpc {
+
+class rpc_client : private boost::noncopyable
+{
+public:
+    static const boost::uint32_t CURRENT_VERSION = 1;
+    static const boost::uint32_t OLDEST_COMPATIBLE_VERSION = 1;
+
+    rpc_client(
+        const std::string& server,
+        const std::string& port,
+        boost::uint32_t process_id,
+        boost::uint32_t host_id);
+    ~rpc_client();
+
+    const boost::system::error_code& call(
+        func_id_t func_id,
+        const func_args_writer_t& in_args,
+        func_args_reader_t &out_args,
+        boost::posix_time::milliseconds timeout);
+
+    inline const boost::system::error_code& status() const {
+        return _exec_err;
+    }
+
+    /* [Possible boost::system::error_code values]
+     * boost::asio::error::connection_aborted: Network connection failure
+     * boost::asio::error::eof:                Network connection closed cleanly
+     * boost::asio::error::connection_refused: Software handshake failure (version mismatch, etc)
+     * boost::asio::error::timed_out:          RPC call timed out
+     * boost::asio::error::operation_aborted:  RPC call aborted but connection alive
+     */
+
+private:
+    void _handle_response_hdr(const boost::system::error_code& err, size_t transferred, size_t expected);
+    void _handle_response_data(const boost::system::error_code& err, size_t transferred, size_t expected);
+    void _wait_for_next_response_header();
+
+    inline void _stop_io_service() {
+        if (_io_service_thread.get()) {
+            UHD_LOG << "rpc_client stopping..." << std::endl;
+            _io_service.stop();
+            _io_service_thread->join();
+            _io_service_thread.reset();
+            UHD_LOG << "rpc_client stopped." << std::endl;
+        }
+    }
+
+    //Services
+    boost::asio::io_service             _io_service;
+    boost::scoped_ptr<boost::thread>    _io_service_thread;
+    boost::asio::ip::tcp::socket        _socket;
+    //Handshake info
+    hshake_args_t                       _hshake_args_client;
+    hshake_args_t                       _hshake_args_server;
+    //In-out function args
+    func_xport_buf_t                    _request;
+    func_xport_buf_t                    _response;
+    //Synchronization
+    boost::mutex                        _mutex;
+    boost::condition_variable           _exec_gate;
+    boost::system::error_code           _exec_err;
+};
+
+}}
+
+#endif /* INCLUDED_RPC_CLIENT_HPP */
diff --git a/host/include/uhd/transport/nirio/rpc/rpc_common.hpp b/host/include/uhd/transport/nirio/rpc/rpc_common.hpp
new file mode 100644
index 000000000..ea5b3337d
--- /dev/null
+++ b/host/include/uhd/transport/nirio/rpc/rpc_common.hpp
@@ -0,0 +1,158 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_RPC_COMMON_HPP
+#define INCLUDED_RPC_COMMON_HPP
+
+#define USE_BINARY_ARCHIVE 0
+
+#include <string>
+#include <iostream>
+#include <sstream>
+#include <vector>
+#if (USE_BINARY_ARCHIVE)
+    #include <boost/archive/binary_oarchive.hpp>
+    #include <boost/archive/binary_iarchive.hpp>
+#else
+    #include <boost/archive/text_oarchive.hpp>
+    #include <boost/archive/text_iarchive.hpp>
+#endif
+
+namespace uhd { namespace usrprio_rpc {
+
+//[Over-the-wire] IDs
+typedef boost::int32_t  func_id_t;
+typedef boost::uint64_t client_id_t;
+
+#define build_client_id(host_id, process_id) \
+    ((static_cast<boost::uint64_t>(host_id) << 32) | static_cast<boost::uint64_t>(process_id))
+#define get_process_id_from_client_id(client_id) \
+    (static_cast<boost::int32_t>(client_id))
+#define get_host_id_from_client_id(client_id) \
+    (static_cast<boost::uint32_t>(client_id >> 32))
+
+//[Over-the-wire] Handshake format
+struct hshake_args_t {
+    boost::uint32_t version;
+    boost::uint32_t oldest_comp_version;
+    boost::int32_t  boost_archive_version;
+    client_id_t     client_id;
+};
+
+//[Over-the-wire] Header for RPC request and response
+class func_args_header_t {
+public:
+    func_id_t       func_id;
+    client_id_t     client_id;
+    boost::uint32_t func_args_size;
+
+    static bool match_function(const func_args_header_t& a, const func_args_header_t& b) {
+        return ((a.func_id == b.func_id) && (a.client_id == b.client_id));
+    }
+};
+
+//[Internal] Storage for RPC header and arguments
+class func_xport_buf_t {
+public:
+    func_args_header_t  header;
+    std::vector<char>   data;
+};
+
+//[Internal] Serializer for RPC input parameters
+class func_args_writer_t {
+public:
+    func_args_writer_t() : _stream(), _archive(_stream, boost::archive::no_header) {}
+
+    template<typename data_t>
+    void push(const data_t& d) {
+        _archive << d;
+    }
+
+    template<typename data_t>
+    func_args_writer_t& operator<< (const data_t& data) {
+        push(data);
+        return *this;
+    }
+
+    void store(std::vector<char>& data) const {
+        const std::string& str = _stream.str();
+        data.resize(str.length());
+        data.assign((char*)str.c_str(), ((char*)str.c_str()) + str.length());
+    }
+
+private:
+    std::ostringstream              _stream;
+#if (USE_BINARY_ARCHIVE)
+    boost::archive::binary_oarchive _archive;
+#else
+    boost::archive::text_oarchive   _archive;
+#endif
+};
+
+//[Internal] Deserializer for RPC output parameters
+class func_args_reader_t {
+public:
+    func_args_reader_t() : _stream(), _archive() {}
+
+    template<typename data_t>
+    void pull(data_t& d) const {
+        if (_archive) (*_archive) >> d;
+    }
+
+    template<typename data_t>
+    const func_args_reader_t& operator>> (data_t& data) const {
+        pull(data);
+        return *this;
+    }
+
+    void load(const std::vector<char>& data) {
+        _stream.str(std::string(data.begin(), data.end()));
+#if (USE_BINARY_ARCHIVE)
+        _archive.reset(new boost::archive::binary_iarchive(_stream, boost::archive::no_header));
+#else
+        _archive.reset(new boost::archive::text_iarchive(_stream, boost::archive::no_header));
+#endif
+    }
+
+private:
+    std::istringstream                                  _stream;
+#if (USE_BINARY_ARCHIVE)
+    boost::scoped_ptr<boost::archive::binary_iarchive>  _archive;
+#else
+    boost::scoped_ptr<boost::archive::text_iarchive>    _archive;
+#endif
+};
+
+class boost_serialization_archive_utils {
+public:
+    static boost::int32_t get_version() {
+    #if (USE_BINARY_ARCHIVE)
+        typedef boost::archive::binary_oarchive archive_t;
+    #else
+        typedef boost::archive::text_oarchive   archive_t;
+    #endif
+        std::ostringstream stream;
+        archive_t dummy_archive(stream, boost::archive::no_header);
+        return static_cast<boost::int32_t>(dummy_archive.get_library_version());
+    }
+};
+
+}}
+
+#undef USE_BINARY_ARCHIVE
+
+#endif /* INCLUDED_RPC_COMMON_HPP */
diff --git a/host/include/uhd/transport/nirio/rpc/usrprio_rpc_client.hpp b/host/include/uhd/transport/nirio/rpc/usrprio_rpc_client.hpp
new file mode 100644
index 000000000..4b205cceb
--- /dev/null
+++ b/host/include/uhd/transport/nirio/rpc/usrprio_rpc_client.hpp
@@ -0,0 +1,70 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_USRPRIO_RPC_CLIENT_HPP
+#define INCLUDED_USRPRIO_RPC_CLIENT_HPP
+
+#include <uhd/transport/nirio/rpc/rpc_common.hpp>
+#include <uhd/transport/nirio/rpc/rpc_client.hpp>
+#include <uhd/transport/nirio/rpc/usrprio_rpc_common.hpp>
+#include <uhd/transport/nirio/status.h>
+
+namespace uhd { namespace usrprio_rpc {
+
+class UHD_API usrprio_rpc_client {
+public:
+    usrprio_rpc_client(
+        std::string server,
+        std::string port);
+    ~usrprio_rpc_client();
+
+    inline void set_rpc_timeout(boost::posix_time::milliseconds timeout_in_ms) {
+        _timeout = timeout_in_ms;
+    }
+
+    inline nirio_status get_ctor_status() {
+        return _ctor_status;
+    }
+
+    nirio_status niusrprio_enumerate(
+        NIUSRPRIO_ENUMERATE_ARGS);
+    nirio_status niusrprio_open_session(
+        NIUSRPRIO_OPEN_SESSION_ARGS);
+    nirio_status niusrprio_close_session(
+        NIUSRPRIO_CLOSE_SESSION_ARGS);
+    nirio_status niusrprio_reset_device(
+        NIUSRPRIO_RESET_SESSION_ARGS);
+    nirio_status niusrprio_download_bitstream_to_fpga(
+        NIUSRPRIO_DOWNLOAD_BITSTREAM_TO_FPGA_ARGS);
+    nirio_status niusrprio_get_interface_path(
+         NIUSRPRIO_GET_INTERFACE_PATH_ARGS);
+    nirio_status niusrprio_download_fpga_to_flash(
+        NIUSRPRIO_DOWNLOAD_FPGA_TO_FLASH_ARGS);
+
+    static const boost::int64_t DEFAULT_TIMEOUT_IN_MS = 5000;
+
+private:
+    static nirio_status _boost_error_to_nirio_status(const boost::system::error_code& err);
+
+    rpc_client                      _rpc_client;
+    boost::posix_time::milliseconds _timeout;
+    nirio_status                    _ctor_status;
+};
+
+}}
+
+#endif /* INCLUDED_USRPRIO_RPC_CLIENT_HPP */
diff --git a/host/include/uhd/transport/nirio/rpc/usrprio_rpc_common.hpp b/host/include/uhd/transport/nirio/rpc/usrprio_rpc_common.hpp
new file mode 100644
index 000000000..362d9a174
--- /dev/null
+++ b/host/include/uhd/transport/nirio/rpc/usrprio_rpc_common.hpp
@@ -0,0 +1,85 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_USRPRIO_RPC_COMMON_HPP
+#define INCLUDED_USRPRIO_RPC_COMMON_HPP
+
+#include <uhd/transport/nirio/rpc/rpc_common.hpp>
+
+namespace uhd { namespace usrprio_rpc {
+
+//Function IDs
+
+static const func_id_t NIUSRPRIO_FUNC_BASE                  = 0x100;
+
+static const func_id_t NIUSRPRIO_ENUMERATE                  = NIUSRPRIO_FUNC_BASE + 0;
+static const func_id_t NIUSRPRIO_OPEN_SESSION               = NIUSRPRIO_FUNC_BASE + 1;
+static const func_id_t NIUSRPRIO_CLOSE_SESSION              = NIUSRPRIO_FUNC_BASE + 2;
+static const func_id_t NIUSRPRIO_RESET_SESSION              = NIUSRPRIO_FUNC_BASE + 3;
+static const func_id_t NIUSRPRIO_DOWNLOAD_BITSTREAM_TO_FPGA = NIUSRPRIO_FUNC_BASE + 4;
+static const func_id_t NIUSRPRIO_GET_INTERFACE_PATH         = NIUSRPRIO_FUNC_BASE + 5;
+static const func_id_t NIUSRPRIO_DOWNLOAD_FPGA_TO_FLASH     = NIUSRPRIO_FUNC_BASE + 6;
+
+//Function Args
+
+struct usrprio_device_info {
+    boost::uint32_t interface_num;
+    std::string     resource_name;
+    std::string     pcie_serial_num;
+    std::string     interface_path;
+
+    template <typename Archive>
+    void serialize(Archive& ar, const unsigned int version)
+    {
+        if (version || !version) {  //Suppress unused warning
+            ar & interface_num;
+            ar & resource_name;
+            ar & pcie_serial_num;
+            ar & interface_path;
+        }
+    }
+};
+typedef std::vector<usrprio_device_info> usrprio_device_info_vtr;
+
+#define NIUSRPRIO_ENUMERATE_ARGS        \
+    usrprio_device_info_vtr& device_info_vtr
+
+#define NIUSRPRIO_OPEN_SESSION_ARGS         \
+    const std::string& resource,            \
+    const std::string& path,                \
+    const std::string& signature,           \
+    const boost::uint16_t& download_fpga
+
+#define NIUSRPRIO_CLOSE_SESSION_ARGS    \
+    const std::string& resource
+
+#define NIUSRPRIO_RESET_SESSION_ARGS    \
+    const std::string& resource
+
+#define NIUSRPRIO_DOWNLOAD_BITSTREAM_TO_FPGA_ARGS   \
+    const std::string& resource
+
+#define NIUSRPRIO_GET_INTERFACE_PATH_ARGS   \
+    const std::string& resource,            \
+    std::string& interface_path
+
+#define NIUSRPRIO_DOWNLOAD_FPGA_TO_FLASH_ARGS   \
+    const std::string& resource,                \
+    const std::string& bitstream_path
+}}
+
+#endif /* INCLUDED_USRPRIO_RPC_COMMON_HPP */
diff --git a/host/include/uhd/transport/nirio/status.h b/host/include/uhd/transport/nirio/status.h
new file mode 100644
index 000000000..e4117ac73
--- /dev/null
+++ b/host/include/uhd/transport/nirio/status.h
@@ -0,0 +1,65 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_STATUS_H
+#define INCLUDED_UHD_TRANSPORT_NIRIO_STATUS_H
+
+#include <stdio.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string>
+#include <uhd/exception.hpp>
+
+#define ENABLE_EXTENDED_ERROR_INFO false
+
+typedef int32_t nirio_status;
+
+namespace uhd { namespace niusrprio {
+struct nirio_err_info {
+    nirio_err_info(nirio_status arg_code, const char* arg_msg): code(arg_code), msg(arg_msg) {}
+
+    nirio_status code;
+    const char* msg;
+
+    static const nirio_err_info NIRIO_ERROR_TABLE[];
+    static const size_t NIRIO_ERROR_TABLE_SIZE;
+};
+
+const std::string lookup_err_msg(nirio_status code);
+
+void nirio_status_to_exception(const nirio_status& status, const std::string& message);
+}}
+
+#define nirio_status_fatal(status) ((status) < 0)
+#define nirio_status_not_fatal(status) ((status) >= 0)
+
+#define nirio_status_chain(func, status) 	\
+	if (nirio_status_not_fatal(status)) {	\
+		status = (func);					\
+		if (ENABLE_EXTENDED_ERROR_INFO && nirio_status_fatal(status)) {	\
+			fprintf(stderr,"ERROR: The following function call returned status code %d\n%s\n%s:%d\n",status,#func,__FILE__,__LINE__);	\
+		}									\
+	}										\
+
+
+#define NIRIO_ERR_INFO(CONST_NAME, ERR_CODE, ERR_MSG) \
+    static const nirio_status CONST_NAME = ERR_CODE;
+#include "nirio_err_template.h"
+#undef NIRIO_ERR_INFO
+
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_STATUS_H */
diff --git a/host/include/uhd/transport/nirio_zero_copy.hpp b/host/include/uhd/transport/nirio_zero_copy.hpp
new file mode 100644
index 000000000..5b16b1975
--- /dev/null
+++ b/host/include/uhd/transport/nirio_zero_copy.hpp
@@ -0,0 +1,43 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_NIRIO_ZERO_COPY_HPP
+#define INCLUDED_UHD_TRANSPORT_NIRIO_ZERO_COPY_HPP
+
+#include <uhd/transport/nirio/niusrprio_session.h>
+#include <uhd/config.hpp>
+#include <uhd/transport/zero_copy.hpp>
+#include <uhd/types/device_addr.hpp>
+#include <boost/shared_ptr.hpp>
+
+namespace uhd{ namespace transport{
+
+class UHD_API nirio_zero_copy : public virtual zero_copy_if{
+public:
+    typedef boost::shared_ptr<nirio_zero_copy> sptr;
+
+    static sptr make(
+        uhd::niusrprio::niusrprio_session::sptr fpga_session,
+        const uint32_t instance,
+        const zero_copy_xport_params &default_buff_args,
+        const device_addr_t &hints = device_addr_t()
+    );
+};
+
+}} //namespace
+
+#endif /* INCLUDED_UHD_TRANSPORT_NIRIO_ZERO_COPY_HPP */
diff --git a/host/include/uhd/transport/tcp_zero_copy.hpp b/host/include/uhd/transport/tcp_zero_copy.hpp
new file mode 100644
index 000000000..a9878a396
--- /dev/null
+++ b/host/include/uhd/transport/tcp_zero_copy.hpp
@@ -0,0 +1,57 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_TRANSPORT_TCP_ZERO_COPY_HPP
+#define INCLUDED_UHD_TRANSPORT_TCP_ZERO_COPY_HPP
+
+#include <uhd/config.hpp>
+#include <uhd/transport/zero_copy.hpp>
+#include <uhd/types/device_addr.hpp>
+#include <boost/shared_ptr.hpp>
+
+namespace uhd{ namespace transport{
+
+/*!
+ * The zero copy TCP transport.
+ * This transport provides the uhd zero copy interface
+ * on top of a standard tcp socket from boost asio.
+ */
+struct UHD_API tcp_zero_copy : public virtual zero_copy_if
+{
+    /*!
+     * Make a new zero copy TCP transport:
+     * This transport is for sending and receiving
+     * between this host and a single endpoint.
+     * The primary usage for this transport will be data transactions.
+     *
+     * The address will be resolved, it can be a host name or ipv4.
+     * The port will be resolved, it can be a port type or number.
+     *
+     * \param addr a string representing the destination address
+     * \param port a string representing the destination port
+     * \param hints optional parameters to pass to the underlying transport
+     */
+    static zero_copy_if::sptr make(
+        const std::string &addr,
+        const std::string &port,
+        const device_addr_t &hints = device_addr_t()
+    );
+};
+
+}} //namespace
+
+#endif /* INCLUDED_UHD_TRANSPORT_TCP_ZERO_COPY_HPP */
diff --git a/host/include/uhd/transport/udp_zero_copy.hpp b/host/include/uhd/transport/udp_zero_copy.hpp
index bbba97b21..8fb5115c2 100644
--- a/host/include/uhd/transport/udp_zero_copy.hpp
+++ b/host/include/uhd/transport/udp_zero_copy.hpp
@@ -37,6 +37,11 @@ namespace uhd{ namespace transport{
  */
 class UHD_API udp_zero_copy : public virtual zero_copy_if{
 public:
+    struct buff_params {
+        size_t  recv_buff_size;
+        size_t  send_buff_size;
+    };
+
     typedef boost::shared_ptr<udp_zero_copy> sptr;
 
     /*!
@@ -56,6 +61,8 @@ public:
     static sptr make(
         const std::string &addr,
         const std::string &port,
+        const zero_copy_xport_params &default_buff_args,
+        udp_zero_copy::buff_params& buff_params_out,
         const device_addr_t &hints = device_addr_t()
     );
 };
diff --git a/host/include/uhd/transport/zero_copy.hpp b/host/include/uhd/transport/zero_copy.hpp
index 40d7b8c59..9ff3042aa 100644
--- a/host/include/uhd/transport/zero_copy.hpp
+++ b/host/include/uhd/transport/zero_copy.hpp
@@ -29,7 +29,14 @@ namespace uhd{ namespace transport{
     //! Simple managed buffer with release interface
     class UHD_API managed_buffer{
     public:
-        managed_buffer(void):_ref_count(0),_buffer(NULL),_length(0){}
+        managed_buffer(void):_ref_count(0),_buffer(NULL),_length(0)
+		{
+#ifdef UHD_TXRX_DEBUG_PRINTS
+            _mb_num = s_buffer_count;
+            // From Boost website: atomic_count seems only to have precrement operator.
+            ++s_buffer_count;
+#endif
+        }
 
         virtual ~managed_buffer(void) {}
 
@@ -76,9 +83,27 @@ namespace uhd{ namespace transport{
         boost::detail::atomic_count _ref_count;
         typedef boost::intrusive_ptr<managed_buffer> sptr;
 
+        int ref_count(){
+        	return (int) _ref_count;
+        }
+
+#ifdef UHD_TXRX_DEBUG_PRINTS
+        int num() const{
+        	return _mb_num;
+        }
+#endif
+
     protected:
         void *_buffer;
         size_t _length;
+#ifdef UHD_TXRX_DEBUG_PRINTS
+        int _mb_num;
+#endif
+
+    private:
+#ifdef UHD_TXRX_DEBUG_PRINTS
+        static boost::detail::atomic_count s_buffer_count;
+#endif
     };
 
     UHD_INLINE void intrusive_ptr_add_ref(managed_buffer *p){
@@ -110,6 +135,16 @@ namespace uhd{ namespace transport{
     };
 
     /*!
+     * Transport parameters
+     */
+    struct zero_copy_xport_params {
+        size_t recv_frame_size;
+        size_t send_frame_size;
+        size_t num_recv_frames;
+        size_t num_send_frames;
+    };
+
+    /*!
      * A zero-copy interface for transport objects.
      * Provides a way to get send and receive buffers
      * with memory managed by the transport object.
@@ -119,6 +154,11 @@ namespace uhd{ namespace transport{
         typedef boost::shared_ptr<zero_copy_if> sptr;
 
         /*!
+         * Clean up tasks before releasing the transport object.
+         */
+        virtual ~zero_copy_if() {};
+
+        /*!
          * Get a new receive buffer from this transport object.
          * \param timeout the timeout to get the buffer in seconds
          * \return a managed buffer, or null sptr on timeout/error
diff --git a/host/include/uhd/types/metadata.hpp b/host/include/uhd/types/metadata.hpp
index 788999900..6a79720d0 100644
--- a/host/include/uhd/types/metadata.hpp
+++ b/host/include/uhd/types/metadata.hpp
@@ -30,6 +30,26 @@ namespace uhd{
      * The receive routines will convert IF data headers into metadata.
      */
     struct UHD_API rx_metadata_t{
+
+        //! Default constructor.
+        rx_metadata_t()
+        {
+            reset();
+        }
+
+        //! Reset values.
+        void reset()
+        {
+            has_time_spec = false;
+            time_spec = time_spec_t(0.0);
+            more_fragments = false;
+            fragment_offset = 0;
+            start_of_burst = false;
+            end_of_burst = false;
+            error_code = ERROR_CODE_NONE;
+            out_of_sequence = false;
+        }
+
         //! Has time specification?
         bool has_time_spec;
 
@@ -80,13 +100,23 @@ namespace uhd{
             ERROR_CODE_LATE_COMMAND = 0x2,
             //! Expected another stream command.
             ERROR_CODE_BROKEN_CHAIN = 0x4,
-            //! An internal receive buffer has filled.
+            /*!
+             * An internal receive buffer has filled or a sequence error has been detected.
+             * So, why is this overloaded?  Simple: legacy support. It would have been much cleaner
+             * to create a separate error code for a sequence error, but that would have broken
+             * legacy applications.  So, the out_of_sequence flag was added to differentiate between
+             * the two error cases.  In either case, data is missing between this time_spec and the
+             * and the time_spec of the next successful receive.
+             */
             ERROR_CODE_OVERFLOW     = 0x8,
             //! Multi-channel alignment failed.
             ERROR_CODE_ALIGNMENT    = 0xc,
             //! The packet could not be parsed.
             ERROR_CODE_BAD_PACKET   = 0xf
         } error_code;
+
+        //! Out of sequence.  The transport has either dropped a packet or received data out of order.
+        bool out_of_sequence;
     };
 
     /*!
diff --git a/host/include/uhd/types/tune_request.hpp b/host/include/uhd/types/tune_request.hpp
index dd6123a9f..d1f3b4463 100644
--- a/host/include/uhd/types/tune_request.hpp
+++ b/host/include/uhd/types/tune_request.hpp
@@ -96,7 +96,7 @@ namespace uhd{
          * - mode_n: Allows the user to tell the daughterboard tune code
          * to choose between an integer N diviver or fractional N divider.
          * Default is fractional N on boards that support fractional N tuning.
-         * Fractional N provides greater tuning acuracy at the expense of spurs.
+         * Fractional N provides greater tuning accuracy at the expense of spurs.
          * Possible options for this key: "integer" or "fractional".
          */
         device_addr_t args;
diff --git a/host/include/uhd/usrp/gps_ctrl.hpp b/host/include/uhd/usrp/gps_ctrl.hpp
index abe5c37ba..bbccac8bb 100644
--- a/host/include/uhd/usrp/gps_ctrl.hpp
+++ b/host/include/uhd/usrp/gps_ctrl.hpp
@@ -32,7 +32,7 @@ public:
   typedef boost::shared_ptr<gps_ctrl> sptr;
 
   /*!
-   * Make a GPS config for NMEA GPS devices
+   * Make a GPS config for internal GPSDOs or generic NMEA GPS devices
    */
   static sptr make(uart_iface::sptr uart);
 
diff --git a/host/include/uhd/usrp/multi_usrp.hpp b/host/include/uhd/usrp/multi_usrp.hpp
index d60f0e60c..5b4991202 100644
--- a/host/include/uhd/usrp/multi_usrp.hpp
+++ b/host/include/uhd/usrp/multi_usrp.hpp
@@ -339,6 +339,26 @@ public:
     virtual std::vector<std::string> get_clock_sources(const size_t mboard) = 0;
 
     /*!
+     * Send the clock source to an output connector.
+     * This call is only applicable on devices with reference outputs.
+     * By default, the reference output will be enabled for ease of use.
+     * This call may be used to enable or disable the output.
+     * \param enb true to output the clock source.
+     * \param mboard which motherboard to set
+     */
+    virtual void set_clock_source_out(const bool enb, const size_t mboard = ALL_MBOARDS) = 0;
+
+    /*!
+     * Send the time source to an output connector.
+     * This call is only applicable on devices with PPS outputs.
+     * By default, the PPS output will be enabled for ease of use.
+     * This call may be used to enable or disable the output.
+     * \param enb true to output the time source.
+     * \param mboard which motherboard to set
+     */
+    virtual void set_time_source_out(const bool enb, const size_t mboard = ALL_MBOARDS) = 0;
+
+    /*!
      * Get the number of USRP motherboards in this configuration.
      */
     virtual size_t get_num_mboards(void) = 0;
@@ -856,6 +876,53 @@ public:
      */
     virtual void set_tx_iq_balance(const std::complex<double> &correction, size_t chan = ALL_CHANS) = 0;
 
+    /*******************************************************************
+     * GPIO methods
+     ******************************************************************/
+
+    /*!
+     * Enumerate gpio banks on the specified device.
+     * \param mboard the motherboard index 0 to M-1
+     * \return a list of string for each bank name
+     */
+    virtual std::vector<std::string> get_gpio_banks(const size_t mboard) = 0;
+
+    /*!
+     * Set a GPIO attribute on a particular GPIO bank.
+     * Possible attribute names:
+     *  - CTRL - 1 for ATR mode 0 for GPIO mode
+     *  - DDR - 1 for output 0 for input
+     *  - OUT - GPIO output level (not ATR mode)
+     *  - ATR_0X - ATR idle state
+     *  - ATR_RX - ATR receive only state
+     *  - ATR_TX - ATR transmit only state
+     *  - ATR_XX - ATR full duplex state
+     * \param bank the name of a GPIO bank
+     * \param attr the name of a GPIO attribute
+     * \param value the new value for this GPIO bank
+     * \param mask the bit mask to effect which pins are changed
+     * \param mboard the motherboard index 0 to M-1
+     */
+    virtual void set_gpio_attr(const std::string &bank, const std::string &attr, const boost::uint32_t value, const boost::uint32_t mask = 0xffffffff, const size_t mboard = 0) = 0;
+
+    /*!
+     * Get a GPIO attribute on a particular GPIO bank.
+     * Possible attribute names:
+     *  - CTRL - 1 for ATR mode 0 for GPIO mode
+     *  - DDR - 1 for output 0 for input
+     *  - OUT - GPIO output level (not ATR mode)
+     *  - ATR_0X - ATR idle state
+     *  - ATR_RX - ATR receive only state
+     *  - ATR_TX - ATR transmit only state
+     *  - ATR_XX - ATR full duplex state
+     *  - READBACK - readback input GPIOs
+     * \param bank the name of a GPIO bank
+     * \param attr the name of a GPIO attribute
+     * \param mboard the motherboard index 0 to M-1
+     * \return the value set for this attribute
+     */
+    virtual boost::uint32_t get_gpio_attr(const std::string &bank, const std::string &attr, const size_t mboard = 0) = 0;
+
 };
 
 }}
diff --git a/host/include/uhd/utils/CMakeLists.txt b/host/include/uhd/utils/CMakeLists.txt
index e86826435..c0991b3ce 100644
--- a/host/include/uhd/utils/CMakeLists.txt
+++ b/host/include/uhd/utils/CMakeLists.txt
@@ -30,6 +30,7 @@ UHD_INSTALL(FILES
     msg_task.hpp
     paths.hpp
     pimpl.hpp
+    platform.hpp
     safe_call.hpp
     safe_main.hpp
     static.hpp
diff --git a/host/include/uhd/utils/platform.hpp b/host/include/uhd/utils/platform.hpp
new file mode 100644
index 000000000..de778f61c
--- /dev/null
+++ b/host/include/uhd/utils/platform.hpp
@@ -0,0 +1,36 @@
+//
+// Copyright 2010,2012 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_UHD_UTILS_PLATFORM_HPP
+#define INCLUDED_UHD_UTILS_PLATFORM_HPP
+
+#include <boost/cstdint.hpp>
+
+namespace uhd {
+
+    /* Returns the process ID of the current process */
+    boost::int32_t get_process_id();
+
+    /* Returns a unique identifier for the current machine */
+    boost::uint32_t get_host_id();
+
+    /* Get a unique identifier for the current machine and process */
+    boost::uint32_t get_process_hash();
+
+} //namespace uhd
+
+#endif /* INCLUDED_UHD_UTILS_PLATFORM_HPP */
diff --git a/host/include/uhd/version.hpp b/host/include/uhd/version.hpp
index a62ee8285..1bb89dd84 100644
--- a/host/include/uhd/version.hpp
+++ b/host/include/uhd/version.hpp
@@ -1,5 +1,5 @@
 //
-// Copyright 2010-2013 Ettus Research LLC
+// Copyright 2010-2014 Ettus Research LLC
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -27,7 +27,7 @@
  * The format is oldest API compatible release - ABI compat number.
  * The compatibility number allows pre-release ABI to be versioned.
  */
-#define UHD_VERSION_ABI_STRING "3.6.0-1"
+#define UHD_VERSION_ABI_STRING "3.7.0-0"
 
 namespace uhd{
 
diff --git a/host/lib/convert/convert_pack_sc12.cpp b/host/lib/convert/convert_pack_sc12.cpp
index 92cd5d152..081f60a89 100644
--- a/host/lib/convert/convert_pack_sc12.cpp
+++ b/host/lib/convert/convert_pack_sc12.cpp
@@ -80,13 +80,26 @@ struct convert_star_1_to_sc12_item32_1 : public converter
     void operator()(const input_type &inputs, const output_type &outputs, const size_t nsamps)
     {
         const std::complex<type> *input = reinterpret_cast<const std::complex<type> *>(inputs[0]);
-        item32_sc12_3x *output = reinterpret_cast<item32_sc12_3x *>(size_t(outputs[0]) & ~0x3);
+
+        /*
+         * Effectively outputs will point to a managed_buffer instance. These buffers are 32 bit aligned.
+         * For a detailed description see comments in 'convert_unpack_sc12.cpp'.
+         */
+        const size_t head_samps = size_t(inputs[0]) & 0x3;
+        size_t rewind = 0;
+        switch(head_samps)
+        {
+            case 0: break;
+            case 1: rewind = 9; break;
+            case 2: rewind = 6; break;
+            case 3: rewind = 3; break;
+        }
+        item32_sc12_3x *output = reinterpret_cast<item32_sc12_3x *>(size_t(outputs[0]) - rewind);
 
         //helper variables
         size_t i = 0, o = 0;
 
         //handle the head case
-        const size_t head_samps = size_t(outputs[0]) & 0x3;
         switch (head_samps)
         {
         case 0: break; //no head
diff --git a/host/lib/device.cpp b/host/lib/device.cpp
index c5bc047da..ff5163f2d 100644
--- a/host/lib/device.cpp
+++ b/host/lib/device.cpp
@@ -153,3 +153,9 @@ device::sptr device::make(const device_addr_t &hint, size_t which){
         return dev;
     }
 }
+
+uhd::property_tree::sptr
+device::get_tree(void) const
+{
+    return _tree;
+}
diff --git a/host/lib/ic_reg_maps/CMakeLists.txt b/host/lib/ic_reg_maps/CMakeLists.txt
index b6e121db3..889c725db 100644
--- a/host/lib/ic_reg_maps/CMakeLists.txt
+++ b/host/lib/ic_reg_maps/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright 2010-2011 Ettus Research LLC
+# Copyright 2010-2013 Ettus Research LLC
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -98,6 +98,11 @@ LIBUHD_PYTHON_GEN_SOURCE(
 )
 
 LIBUHD_PYTHON_GEN_SOURCE(
+    ${CMAKE_CURRENT_SOURCE_DIR}/gen_ads62p48_regs.py
+    ${CMAKE_CURRENT_BINARY_DIR}/ads62p48_regs.hpp
+)
+
+LIBUHD_PYTHON_GEN_SOURCE(
     ${CMAKE_CURRENT_SOURCE_DIR}/gen_tuner_4937di5_regs.py
     ${CMAKE_CURRENT_BINARY_DIR}/tuner_4937di5_regs.hpp
 )
@@ -107,4 +112,9 @@ LIBUHD_PYTHON_GEN_SOURCE(
     ${CMAKE_CURRENT_BINARY_DIR}/tda18272hnm_regs.hpp
 )
 
+LIBUHD_PYTHON_GEN_SOURCE(
+    ${CMAKE_CURRENT_SOURCE_DIR}/gen_lmk04816_regs.py
+    ${CMAKE_CURRENT_BINARY_DIR}/lmk04816_regs.hpp
+)
+
 UNSET(LIBUHD_PYTHON_GEN_SOURCE_DEPS)
diff --git a/host/lib/ic_reg_maps/gen_ads62p48_regs.py b/host/lib/ic_reg_maps/gen_ads62p48_regs.py
new file mode 100644
index 000000000..c38ce8ff1
--- /dev/null
+++ b/host/lib/ic_reg_maps/gen_ads62p48_regs.py
@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+#
+# Copyright 2013 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+# Template for raw text data describing registers
+# name addr[bit range inclusive] default optional enums
+########################################################################
+REGS_TMPL="""\
+reset                   0[7]          0
+serial_readout          0[0]          0
+enable_low_speed_mode   0x20[2]       0
+ref                     0x3f[6:5]     0       internal=0, external=3
+standby                 0x3f[1]       0       normal, standby
+power_down              0x40[3:0]     0       pins=0, normal=8, chb=9, cha=10, chab=11, global=12, chb_standby=13, cha_standby=14, mux=15
+lvds_cmos               0x41[7]       0       parallel_cmos, ddr_lvds
+clk_out_pos_edge        0x44[7:5]     0       normal=0, plus4_26=5, minus4_26=7, minus7_26=6
+clk_out_neg_edge        0x44[4:2]     0       normal=0, plus4_26=5, minus4_26=7, minus7_26=6
+channel_control         0x50[6]       0                common, independent
+data_format                    0x50[2:1]       2       2s_compliment=2, offset_binary=3
+custom_pattern_low             0x51[7:0]       0
+custom_pattern_high            0x52[5:0]       0
+enable_offset_corr_chA         0x53[6]         0
+gain_chA                       0x55[7:4]       0
+offset_corr_time_const_chA     0x55[3:0]       0
+fine_gain_adjust_chA           0x57[6:0]       0
+test_patterns_chA              0x62[2:0]       0      normal, zeros, ones, toggle, ramp, custom
+offset_pedestal_chA            0x63[5:0]       0
+enable_offset_corr_chB         0x66[6]         0
+gain_chB                       0x68[7:4]       0
+offset_corr_time_const_chB     0x68[3:0]       0
+fine_gain_adjust_chB           0x6A[6:0]       0
+test_patterns_chB              0x75[2:0]       0      normal, zeros, ones, toggle, ramp, custom
+offset_pedestal_chB            0x76[5:0]       0
+"""
+
+########################################################################
+# Template for methods in the body of the struct
+########################################################################
+BODY_TMPL="""\
+boost::uint8_t get_reg(boost::uint8_t addr){
+    boost::uint8_t reg = 0;
+    switch(addr){
+    #for $addr in sorted(set(map(lambda r: r.get_addr(), $regs)))
+    case $addr:
+        #for $reg in filter(lambda r: r.get_addr() == addr, $regs)
+        reg |= (boost::uint8_t($reg.get_name()) & $reg.get_mask()) << $reg.get_shift();
+        #end for
+        break;
+    #end for
+    }
+    return reg;
+}
+
+boost::uint16_t get_write_reg(boost::uint8_t addr){
+    return (boost::uint16_t(addr) << 8) | get_reg(addr);
+}
+
+boost::uint16_t get_read_reg(boost::uint8_t addr){
+    return (boost::uint16_t(addr) << 8) | (1 << 7);
+}
+"""
+
+if __name__ == '__main__':
+    import common; common.generate(
+        name='ads62p48_regs',
+        regs_tmpl=REGS_TMPL,
+        body_tmpl=BODY_TMPL,
+        file=__file__,
+    )
diff --git a/host/lib/ic_reg_maps/gen_lmk04816_regs.py b/host/lib/ic_reg_maps/gen_lmk04816_regs.py
new file mode 100644
index 000000000..e89a82671
--- /dev/null
+++ b/host/lib/ic_reg_maps/gen_lmk04816_regs.py
@@ -0,0 +1,407 @@
+#Copyright 2010 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+# Template for raw text data describing registers
+# name addr[bit range inclusive] default optional enums
+########################################################################
+REGS_TMPL="""\
+########################################################################
+## address 0
+########################################################################
+address0		 0[0:4]     0          
+CLKout0_1_DIV	         0[5:15]    25          
+CLKout0_1_HS             0[16]      0          
+RESET                    0[17]      0          no_reset, reset
+CLKout0_1_DDLY	         0[18:27]   0          five
+CLKout0_ADLY_SEL         0[28]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout1_ADLY_SEL	 0[29]      0          d_pd, d_ev_x, d_odd_y, d_both
+Required_0		 0[30]      0         
+CLKout0_1_PD             0[31] 	    1	       power_up, power_down 
+########################################################################
+## address 1
+########################################################################
+address1		 1[0:4]     1          
+CLKout2_3_DIV	         1[5:15]    25         
+CLKout2_3_HS             1[16]      0          
+Powerdown                1[17]      0          normal, disabled
+CLKout2_3_DDLY	         1[18:27]   0          
+CLKout2_ADLY_SEL         1[28]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout3_ADLY_SEL	 1[29]      0          d_pd, d_ev_x, d_odd_y, d_both
+Required_1		 1[30]      0         
+CLKout2_3_PD             1[31] 	    1	       power_up, power_down
+########################################################################
+## address 2
+########################################################################
+address2		 2[0:4]     2          
+CLKout4_5_DIV	         2[5:15]    25         
+CLKout4_5_HS             2[16]      0          
+Required_2_17            2[17]      0          
+CLKout4_5_DDLY	         2[18:27]   0          
+CLKout4_ADLY_SEL         2[28]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout5_ADLY_SEL	 2[29]      0          d_pd, d_ev_x, d_odd_y, d_both
+Required_2_30		 2[30]      0         
+CLKout4_5_PD             2[31] 	    1	       power_up, power_down
+########################################################################
+## address 3
+########################################################################
+address3		 3[0:4]     3          
+CLKout6_7_DIV	         3[5:15]    1          
+CLKout6_7_HS             3[16]      0         
+Required_3_17            3[17]      0         
+CLKout6_7_DDLY	         3[18:27]   0          
+CLKout6_ADLY_SEL         3[28]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout7_ADLY_SEL	 3[29]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout6_7_OSCin_Sel      3[30]      1          VCO,OSCin
+CLKout6_7_PD             3[31] 	    0	       power_up, power_down
+########################################################################
+## address 4
+########################################################################
+address4		 4[0:4]     4          
+CLKout8_9_DIV	         4[5:15]    25         
+CLKout8_9_HS             4[16]      0          
+Required_4_17            4[17]      0          
+CLKout8_9_DDLY	         4[18:27]   0          
+CLKout8_ADLY_SEL         4[28]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout9_ADLY_SEL	 4[29]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout8_9_OSCin_Sel      4[30]      0	       VCO, OSCin         
+CLKout8_9_PD             4[31] 	    0	       power_up, power_down
+########################################################################
+## address 5
+########################################################################
+address5		 5[0:4]     5          
+CLKout10_11_DIV	         5[5:15]    25
+CLKout10_11_HS           5[16]      0          
+Required_5_17            5[17]      0          
+CLKout10_11_DDLY	 5[18:27]   0          
+CLKout10_ADLY_SEL        5[28]      0          d_pd, d_ev_x, d_odd_y, d_both
+CLKout11_ADLY_SEL	 5[29]      0          d_pd, d_ev_x, d_odd_y, d_both
+Required_5_30		 5[30]      0         
+CLKout10_11_PD           5[31] 	    1	       normal, power_down
+########################################################################
+## address 6
+########################################################################
+#set $CLKoutX_TYPE_ENUMS = "p_down=0, LVDS=1, LVPECL_700mVpp=2, LVPECL_1200mVpp=3, LVPECL_1600mVpp=4, LVPECL_200mVpp=5, LVCMOS=6, LVCMOS_IN=7, LVCMOS_NN=8, LVCMOS_II=9, LVCMOS_LN=10, LVCMOS_LI=11, LVCMOS_NL=12, LVCMOS_IL=13, LVCMOS_LL=1"
+address6		 6[0:4]     6          
+CLKout0_1_ADLY	         6[5:9]     0          
+Required_6_10	         6[10]      0          
+CLKout2_3_ADLY           6[11:15]   0         
+CLKout0_TYPE	         6[16:19]   0       $(CLKoutX_TYPE_ENUMS)
+CLKout1_TYPE             6[20:23]   0       $(CLKoutX_TYPE_ENUMS)
+CLKout2_TYPE	         6[24:27]   0       $(CLKoutX_TYPE_ENUMS)
+CLKout3_TYPE	         6[28:31]   0       $(CLKoutX_TYPE_ENUMS)
+########################################################################
+## address 7
+########################################################################
+address7	                 7[0:4]     7          
+CLKout4_5_ADLY	         7[5:9]     0          
+Required_7_10	         7[10]      0          
+CLKout6_7_ADLY           7[11:15]   0         
+CLKout4_TYPE	         7[16:19]   0          $(CLKoutX_TYPE_ENUMS)
+CLKout5_TYPE	         7[20:23]   0          $(CLKoutX_TYPE_ENUMS)
+CLKout6_TYPE	         7[24:27]   0          $(CLKoutX_TYPE_ENUMS)
+CLKout7_TYPE	         7[28:31]   0          $(CLKoutX_TYPE_ENUMS)
+########################################################################
+## address 8
+########################################################################
+address8		 8[0:4]     8          
+CLKout8_9_ADLY	         8[5:9]     0          
+Required_8_10	         8[10]      0          
+CLKout10_11_ADLY         8[11:15]   0          $(CLKoutX_TYPE_ENUMS)
+CLKout8_TYPE	         8[16:19]   0          $(CLKoutX_TYPE_ENUMS)
+CLKout9_TYPE	         8[20:23]   0          $(CLKoutX_TYPE_ENUMS)
+CLKout10_TYPE	         8[24:27]   0          $(CLKoutX_TYPE_ENUMS)
+CLKout11_TYPE	         8[28:31]   0          $(CLKoutX_TYPE_ENUMS)
+########################################################################
+## address 9
+########################################################################
+address9		 9[0:4]     9          
+Required_9_5	         9[5]       0          
+Required_9_6	         9[6]       1          
+Required_9_7             9[7]       0         
+Required_9_8	         9[8]       1          
+Required_9_9             9[9]       0          
+Required_9_10	         9[10]      1          
+Required_9_11		 9[11]      0
+Required_9_12		 9[12]      1
+Required_9_13		 9[13]      0
+Required_9_14		 9[14]      1
+Required_9_15            9[15]      0
+Required_9_16            9[16]      1
+Required_9_17            9[17]      0
+Required_9_18            9[18]      1          
+Required_9_19            9[19]      0          
+Required_9_20            9[20]      1         
+Required_9_21            9[21]      0          
+Required_9_22            9[22]      1          
+Required_9_23            9[23]      0          
+Required_9_24            9[24]      1
+Required_9_25            9[25]      0
+Required_9_26            9[26]      1
+Required_9_27            9[27]      0
+Required_9_28            9[28]      1
+Required_9_29            9[29]      0
+Required_9_30            9[30]      1
+Required_9_31            9[31]      0
+########################################################################
+## address 10
+########################################################################
+address10                10[0:4]    10          
+FEEDBACK_MUX             10[5:7]    0          
+VCO_DIV                  10[8:10]   2           
+EN_FEEDBACK_MUX          10[11]     0           powered_down, enabled
+VCO_MUX                  10[12]     0           just_vco, vco_divider
+Required_10_13           10[13]     0          
+Required_10_14           10[14]     1          
+Required_10_15           10[15]     0
+OSCout_DIV               10[16:18]  0		 
+PD_OSCin                 10[19]     0		 normal, power_down
+OSCout10_MUX             10[20]     0		 bypass_div, divided
+Required_10_21           10[21]     0		 
+EN_OSCout0               10[22]     1		 disabled, enabled
+Required_10_23           10[23]     0
+OSCout0_TYPE             10[24:27]  0
+Required_10_28           10[28]     1
+Required_10_range        10[29:31]  0
+########################################################################
+## address 11
+########################################################################
+address11		 11[0:4]    11
+EN_PLL2_XTAL 		 11[5]      0		osc_disabled=0,osc_enabled=1
+Required_11		 11[6:11]   0           
+SYNC_TYPE                11[12:14]  1		input=0,in_pull_up=1,in_pull_down=2,out_push_pull=3,out_inverted=4,out_open_sources=5,out_open_drains=6
+SYNC_EN_AUTO             11[15]     0		man_sync=0,sync_int_gen=1
+SYNC_POL_INV             11[16]     1           sync_high=0,sync_low=1
+SYNC_QUAL                11[17]     0           not_qual=0,fb_mux=1
+SYNC_CLKin2_MUX          11[18:19]  0           log_low=0,CLKin2_LOS=1,CLKin2_Selected=2,uWire_RB=3
+NO_SYNC_CLKout0_1        11[20]     0           clock_xy_sync=0,clock_xy_nosync=1
+NO_SYNC_CLKout2_3        11[21]     0           clock_xy_sync=0,clock_xy_nosync=1
+NO_SYNC_CLKout4_5        11[22]     1           clock_xy_sync=0,clock_xy_nosync=1
+NO_SYNC_CLKout6_7        11[23]     1           clock_xy_sync=0,clock_xy_nosync=1
+NO_SYNC_CLKout8_9        11[24]     0		clock_xy_sync=0,clock_xy_nosync=1
+NO_SYNC_CLKout10_11      11[25]     0		clock_xy_sync=0,clock_xy_nosync=1
+EN_SYNC                  11[26]     1           disable=0,enable=1
+MODE                     11[27:31]  0		dual_int=0, dual_int_zer_delay=2,dual_ext=3,dual_ext_zer_delay=5,pll_two_int=6,pll_two_int_zer_delay=8,pll_two_ext=11,clock_dist=16
+########################################################################
+## address 12
+########################################################################
+address12		 12[0:4]    12
+HOLDOVER_MODE		 12[6:7]    2		disabled=1,enabled=2
+EN_TRACK		 12[8]      1		disabled=0,enabled=1
+Required_12_range917     12[9:17]   0
+Required_12_range1819	 12[18:19]  1
+Required_12_20           12[20]     0
+Required_LE_12           12[21]     0		
+SYNC_PLL1_DLD            12[22]     0		sync_mode_noforce=0,sync_mode_force=1
+SYNC_PLL2_DLD            12[23]     0		sync_mode_noforce=0,sync_mode_force=1
+LD_TYPE                  12[24:26]  3           out_push_pull=3,out_inverted=4,out_open_sources=5,out_open_drains=6
+LD_MUX                   12[27:31]  3		log_low=0,pll1_dld=1,pll2_dld=2,both=3,holdover=4,locked_dac=5,uWire_RB=7,rail=8,low=9,high=10,pll1_N=11,pll1_Nhalf=12,pll2_N=13,pll2_Nhalf=14,pll1_R=15,pll1_Rhalf=16,pll2_R=17,pll2_Rhalf=18
+########################################################################
+## address 13
+########################################################################
+address13		 13[0:4]    13
+EN_CLKin0		 13[5]      1		no_valid_use=0,valid_use=1 
+EN_CLKin1                13[6]      1		no_valid_use=0,valid_use=1 
+EN_CLKin2                13[7]      1		no_valid_use=0,valid_use=1		
+CLKin_Sel_INV            13[8]      0		active_high=0,active_low=1
+CLKin_Select_MODE        13[9:11]   3		CLKin0_man=0,CLKin1_man=1,CLKin2_man=2,pin_sel_mode=3,auto_mode=4,auto_mode_w_next_block_sel=6
+Status_CLKin0_MUX        13[14:12]  0		log_low=0,CLKin0_LOS=1,CLKin0_Selected=2,dac_lock=3,dac_low=4,dac_high=5,uWire_RB=6
+DISABLE_DLD1_DET         13[15]     0		pll1_dld_cause_event=0,pll1_dld_not_cause=1
+Status_CLKin0_TYPE       13[16:18]  2		input=0,in_pull_up=1,in_pull_down=2,out_push_pull=3,out_inverted=4,out_open_sources=5,out_open_drains=6
+Required_13_19           13[19]     0
+Status_CLKin1_MUX        13[20:22]  0		log_low=0,CLKin1_LOS=1,CLKin1_Selected=2,DAC_lock=3,DAC_low=4,DAC_high=5,uWire_RB=6
+Required_19_23           13[23]     0
+HOLDOVER_TYPE            13[24:26]  3		out_push_pull=3,out_inverted=4,out_open_sources=5,out_open_drains=6   
+HOLDOVER_MUX             13[27:31]  7		log_low=0,pll1_dld=1,pll2_dld=2,both=3,holdover=4,locked_dac=5,uWire_RB=7,rail=8,low=9,high=10,pll1_N=11,pll1_Nhalf=12,pll2_N=13,pll2_Nhalf=14,pll1_R=15,pll1_Rhalf=16,pll2_R=17,pll2_Rhalf=18
+########################################################################
+## address 14
+########################################################################
+address14		 14[0:4]    14
+EN_VTUNE_RAIL_DET	 14[5]      0		disabled=0,enabled=1
+DAC_LOW_TRIP             14[6:11]   0
+Required_14_1213         14[12:13]  0
+DAC_HIGH_TRIP            14[14:19]  0				
+CLKin0_BUF_TYPE          14[20]     0		bipolar=0,cmos=1
+CLKin1_BUF_TYPE          14[21]     0		bipolar=0,cmos=1
+CLKin2_BUF_TYPE          14[22]     0		bipolar=0,cmos=1
+Required_14_23           14[23]     0		
+Status_CLKin1_TYPE       14[24:26]  2		input=0,in_pull_up=1,in_pull_down=2,out_push_pull=3,out_inverted=4,out_open_sources=5,out_open_drains=6
+Required_14_27           14[27]     0		
+EN_LOS                   14[28]     1		disable_timeout=0,enable_timeout=1
+Required_14_29           14[29]     0
+LOS_TIMEOUT              14[30:31]  0		1200ns_at_4p2KHz=0,206ns_at_2p5MHz=1,52p9at10MHz=2,23p7_at_22MHz=3
+########################################################################
+## address 15
+########################################################################
+address15 		 15[0:4]    15
+FORCE_HOLDOVER           15[5]      0		disabled=0,enabled=1
+HOLDOVER_DLD_CNT         15[6:19]   512		
+EN_MAN_DAC               15[20]     0		disabled=0,enabled=1
+Required_15              15[21]     0
+MAN_DAC                  15[22:31]  512
+########################################################################
+## address 16
+########################################################################
+address16                16[0:4]     16
+Required_16_5            16[5]       0          
+Required_16_6            16[6]       0          
+Required_16_7            16[7]       0         
+Required_16_8            16[8]       0          
+Required_16_9            16[9]       0          
+Required_16_10           16[10]      1          
+Required_16_11           16[11]      0
+Required_16_12           16[12]      0
+Required_16_13           16[13]      0
+Required_16_14           16[14]      0
+Required_16_15           16[15]      0
+Required_16_16           16[16]      1
+Required_16_17           16[17]      0
+Required_16_18           16[18]      1          
+Required_16_19           16[19]      0          
+Required_16_20           16[20]      1         
+Required_16_21           16[21]      0          
+Required_16_22           16[22]      1          
+Required_16_23           16[23]      0  
+Required_16_24           16[24]      1
+Required_16_25           16[25]      0
+Required_16_26           16[26]      0
+Required_16_27           16[27]      0
+Required_16_28           16[28]      0
+Required_16_29           16[29]      0
+XTAL_LVL		 16[30:31]   0		1p65VPP=0, 1p75VPP=1, 1p90VPP=2, 2p05VPP=3
+########################################################################
+## address 24
+########################################################################
+address24		 24[0:4]     24
+PLL1_WND_SIZE		 24[6:7]     3		5p5ns=0, 10ns=1, 18p6=2, 40ns=3
+PLL1_R_DLY               24[8:10]    0		0ps=0, 205ps=1, 410ps=2, 615ps=3, 820ps=4, 1025ps=5, 1230ps=6, 1345ps=7	
+Required_24_11           24[11]      0
+PLL2_N_DLY		 24[12:14]   0		0ps=0, 205ps=1, 410ps=2, 615ps=3, 820ps=4, 1025ps=5, 1230ps=6, 1345ps=7
+Required_24_15           24[15]      0
+PLL2_R3_LF               24[16:18]   0		200ohm=0, 1kilo_ohm=1, 2kilo_ohm=2, 4kilo_ohm=3, 16kilo_ohm=4
+Required_24_19           24[19]      0
+PLL2_R4_LF               24[20:22]   0		200ohm=0, 1kilo_ohm=1, 2kilo_ohm=2, 4kilo_ohm=3, 16kilo_ohm=4
+Required_24_23           24[23]      0		
+PLL2_C3_LF               24[24:27]   0		10pF=0, 11pF=1, 15pF=2, 16pF=3, 19pF=4, 20pF=5, 24pF=6, 25pF=7, 29pF=8, 30pF=9, 33pF=10, 34pF=11, 38pF=12, 39pF=13
+PLL2_C4_LF               24[28:31]   0		10pF=0, 15pF=1, 29pF=2, 34pF=3, 47pF=4, 52pF=5, 66pF=6, 71pF=7, 103pF=8, 108pF=9, 122pF=10, 126pF=11, 141pF=12, 146pF=13
+#########################################################################
+## address 25
+#########################################################################
+addres25		 25[0:4]     25
+PLL2_CP_TRI_25		 25[5]       0
+PLL1_DLD_CNT_25          25[6:19]    1024
+Required_25              25[20:21]   0
+DAC_CLK_DIV		 25[22:31]   4
+#########################################################################
+## address 26
+#########################################################################
+address26		 26[0:4]     26
+PLL2_CP_TRI_26           26[5]       0		PLL2_cpout2_active=0,PLL2cpout2T=1
+PLL2_DLD_CNT_26		 26[6:19]    81
+Required_26_20           26[20]      0
+Required_26_21           26[21]      1
+Required_26_22           26[22]      0
+Required_26_23           26[23]      1
+Required_26_24           26[24]      1
+Required_26_25           26[25]       1
+PLL2_CP_GAIN_26          26[26:27]   3		100uA=0, 400uA=1, 1600uA=2, 3200uA=3
+PLL2_CP_POL_26           26[28]      0		neg_slope=0, pos_slope=1
+EN_PLL2_REF_2X           26[29]      0		normal_freq_ref=0, doubled_freq_ref=1
+PLL2_WND_SIZE            26[30:31]   2		3p7ns=2
+#########################################################################
+## address 27
+#########################################################################
+address27		 27[0:4]     27
+PLL1_CP_TRI_27           27[5]       0	       PLL2_cpout2_active=0,PLL2_cpout2TRI=1
+PLL1_R_27                27[6:19]    96
+CLKin0_PreR_DIV		 27[20:21]   0         div1=0,div2=1,div4=2,div8=3
+CLKin1_PreR_DIV          27[22:23]   0         div1=0,div2=1,div4=2,div8=3
+CLKin2_PreR_DIV          27[24:25]   0         div1=0,div2=1,div4=2,div8=3
+PLL1_CP_GAIN_27          27[26:27]   0	       100uA=0, 200uA=1, 400uA=2, 1600uA=3
+PLL1_CP_POL_27           27[28]      1	       neg_slove=0, pos_slope=1
+Reqiured_27              27[29:31]   0
+#########################################################################
+## address 28
+#########################################################################
+address28                28[0:4]     28
+Required_28              28[5]       0
+PLL1_N_28                28[6:19]    192
+PLL2_R_28                28[20:31]   4
+#########################################################################
+## address 29
+#########################################################################
+address29                29[0:4]     29
+PLL2_N_CAL_29            29[5:22]    48
+PLL2_FAST_PDF_29         29[23]      1		100MHz_less=0, 100MHz_more=1
+OSCin_FREQ_29            29[24:26]   1		zero_to_63MHz=0, 63_to_127MHz=1, 127_to_255MHz=2, 255_to_400MHz=4
+Required29               29[27:31]   0
+#########################################################################
+## address 30
+#########################################################################
+address30		 30[0:4]     30
+PLL2_N_30                30[5:22]    48
+Required_30_522          30[23]      0		
+PLL2_P_30                30[24:26]   2		div_8=0, div_2=1, div_2a=2, div_3=3, div_4=4, div_5=5, div_6=6, div_7=7
+Required_2731            30[27:31]   0
+#########################################################################
+## address 31
+#########################################################################
+address31                31[0:4]     31
+uWire_LOCK               31[5]       0		reg_locked=0, reg_unlocked=1
+Required_615             31[6:15]    0
+READBACK_ADDR            31[16:20]   31		R0=0, R1=1, R2=2, R3=3, R4=4, R5=5, R6=6, R7=7, R8=8, R10=10, R11=11, R12=12, R13=13, R14=14, R15=15, R24=24, R25=25, R26=26, R27=27, R28=28, R29=29, R30=30, R31=31
+READBACK_LE              31[21]      0		LE_low=0, LE_high=1
+Required_2231            31[22:31]   0
+""" 
+########################################################################
+# Template for methods in the body of the struct
+########################################################################
+
+BODY_TMPL = """\
+
+
+
+
+boost::uint32_t get_reg(int addr){
+    boost::uint32_t reg = 0;
+    switch(addr){
+    #for $addr in sorted(set(map(lambda r: r.get_addr(), $regs)))
+    case $addr:
+        #for $reg in filter(lambda r: r.get_addr() == addr, $regs)
+        reg |= (boost::uint32_t($reg.get_name()) & $reg.get_mask()) << $reg.get_shift();
+        #end for
+        break;
+    #end for
+    }
+    return reg;
+}
+"""
+
+
+
+
+
+if __name__ == '__main__':
+    import common; common.generate(
+        name='lmk04816_regs',
+        regs_tmpl=REGS_TMPL,
+        body_tmpl=BODY_TMPL,
+        file=__file__,
+    )
+
+
+
+            
diff --git a/host/lib/transport/CMakeLists.txt b/host/lib/transport/CMakeLists.txt
index 963edcf85..5920f3d78 100644
--- a/host/lib/transport/CMakeLists.txt
+++ b/host/lib/transport/CMakeLists.txt
@@ -20,6 +20,11 @@
 ########################################################################
 
 ########################################################################
+# Include subdirectories (different than add)
+########################################################################
+INCLUDE_SUBDIRECTORY(nirio)
+
+########################################################################
 # Setup libusb
 ########################################################################
 MESSAGE(STATUS "")
@@ -119,7 +124,18 @@ LIBUHD_PYTHON_GEN_SOURCE(
 )
 
 LIBUHD_APPEND_SOURCES(
+    ${CMAKE_CURRENT_SOURCE_DIR}/tcp_zero_copy.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/buffer_pool.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/if_addrs.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/udp_simple.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/nirio_zero_copy.cpp
 )
+
+# Verbose Debug output for send/recv
+SET( UHD_TXRX_DEBUG_PRINTS OFF CACHE BOOL "Use verbose debug output for send/recv" )
+OPTION( UHD_TXRX_DEBUG_PRINTS "Use verbose debug output for send/recv" "" )
+IF(UHD_TXRX_DEBUG_PRINTS)
+	MESSAGE(STATUS "Using verbose debug output for send/recv")
+	ADD_DEFINITIONS(-DUHD_TXRX_DEBUG_PRINTS)
+ENDIF()
+
diff --git a/host/lib/transport/buffer_pool.cpp b/host/lib/transport/buffer_pool.cpp
index 971bbb75a..0fcebecb1 100644
--- a/host/lib/transport/buffer_pool.cpp
+++ b/host/lib/transport/buffer_pool.cpp
@@ -16,11 +16,21 @@
 //
 
 #include <uhd/transport/buffer_pool.hpp>
+#include <uhd/transport/zero_copy.hpp>
 #include <boost/shared_array.hpp>
 #include <vector>
 
 using namespace uhd::transport;
 
+#ifdef UHD_TXRX_DEBUG_PRINTS
+/*
+ * This is the implementation for the static variable 's_buffer_count'
+ * located in uhd/transport/zero_copy.hpp.
+ * It is used in the managed_buffer class.
+ */
+boost::detail::atomic_count managed_buffer::s_buffer_count(0);
+#endif // UHD_TXRX_DEBUG_PRINTS
+
 //! pad the byte count to a multiple of alignment
 static size_t pad_to_boundary(const size_t bytes, const size_t alignment){
     return bytes + (alignment - bytes)%alignment;
diff --git a/host/lib/transport/libusb1_zero_copy.cpp b/host/lib/transport/libusb1_zero_copy.cpp
index 2d18e1623..4ea2032e3 100644
--- a/host/lib/transport/libusb1_zero_copy.cpp
+++ b/host/lib/transport/libusb1_zero_copy.cpp
@@ -31,6 +31,12 @@
 #include <boost/thread/condition_variable.hpp>
 #include <list>
 
+#ifdef UHD_TXRX_DEBUG_PRINTS
+#include <vector>
+#include <fstream>
+#include <boost/format.hpp>
+#endif
+
 using namespace uhd;
 using namespace uhd::transport;
 
@@ -69,12 +75,23 @@ struct lut_result_t
         completed = 0;
         status = LIBUSB_TRANSFER_COMPLETED;
         actual_length = 0;
+#ifdef UHD_TXRX_DEBUG_PRINTS
+        start_time = 0;
+        buff_num = -1;
+#endif
     }
     int completed;
     libusb_transfer_status status;
     int actual_length;
     boost::mutex mut;
     boost::condition_variable usb_transfer_complete;
+
+#ifdef UHD_TXRX_DEBUG_PRINTS
+    // These are fore debugging
+    long start_time;
+    int buff_num;
+    bool is_recv;
+#endif
 };
 
 // Created to be used as an argument to boost::condition_variable::timed_wait() function
@@ -84,6 +101,14 @@ struct lut_result_completed {
     bool operator()() const {return (_result.completed ? true : false);}
 };
 
+#ifdef UHD_TXRX_DEBUG_PRINTS
+static std::string dbg_prefix("libusb1_zero_copy,");
+static void libusb1_zerocopy_dbg_print_err(std::string msg){
+	msg = dbg_prefix + msg;
+	fprintf(stderr, "%s\n", msg.c_str());
+}
+#endif
+
 /*!
  * All libusb callback functions should be marked with the LIBUSB_CALL macro
  * to ensure that they are compiled with the same calling convention as libusb.
@@ -98,6 +123,10 @@ static void LIBUSB_CALL libusb_async_cb(libusb_transfer *lut)
     r->actual_length = lut->actual_length;
     r->completed = 1;
     r->usb_transfer_complete.notify_one();  // wake up thread waiting in wait_for_completion() member function below
+#ifdef UHD_TXRX_DEBUG_PRINTS
+    long end_time = boost::get_system_time().time_of_day().total_microseconds();
+    libusb1_zerocopy_dbg_print_err( (boost::format("libusb_async_cb,%s,%i,%i,%i,%ld,%ld") % (r->is_recv ? "rx":"tx") % r->buff_num % r->actual_length % r->status % end_time % r->start_time).str() );
+#endif
 }
 
 /***********************************************************************
@@ -113,11 +142,18 @@ public:
         _ctx(libusb::session::get_global_session()->get_context()),
         _lut(lut), _frame_size(frame_size) { /* NOP */ }
 
-    void release(void){_release_cb(this);}
+    void release(void){
+    	_release_cb(this);
+    }
 
     UHD_INLINE void submit(void)
     {
-        _lut->length = (_is_recv)? _frame_size : size(); //always set length
+    	_lut->length = (_is_recv)? _frame_size : size(); //always set length
+#ifdef UHD_TXRX_DEBUG_PRINTS
+        result.start_time = boost::get_system_time().time_of_day().total_microseconds();
+        result.buff_num = num();
+        result.is_recv = _is_recv;
+#endif
         const int ret = libusb_submit_transfer(_lut);
         if (ret != 0) throw uhd::runtime_error(str(boost::format(
             "usb %s submit failed: %s") % _name % libusb_error_name(ret)));
@@ -160,7 +196,6 @@ public:
     }
 
 private:
-
     boost::function<void(libusb_zero_copy_mb *)> _release_cb;
     const bool _is_recv;
     const std::string _name;
@@ -214,7 +249,7 @@ public:
             UHD_ASSERT_THROW(lut != NULL);
 
             _mb_pool.push_back(boost::make_shared<libusb_zero_copy_mb>(
-                lut, this->get_frame_size(), boost::bind(&libusb_zero_copy_single::enqueue_damn_buffer, this, _1), is_recv, name
+                lut, this->get_frame_size(), boost::bind(&libusb_zero_copy_single::enqueue_buffer, this, _1), is_recv, name
             ));
 
             libusb_fill_bulk_transfer(
@@ -304,7 +339,7 @@ private:
     //! why 2 queues? there is room in the future to have > N buffers but only N in flight
     boost::circular_buffer<libusb_zero_copy_mb *> _enqueued, _released;
 
-    void enqueue_damn_buffer(libusb_zero_copy_mb *mb)
+    void enqueue_buffer(libusb_zero_copy_mb *mb)
     {
         boost::mutex::scoped_lock l(_mutex);
         _released.push_back(mb);
diff --git a/host/lib/transport/nirio/CMakeLists.txt b/host/lib/transport/nirio/CMakeLists.txt
new file mode 100644
index 000000000..6a33da6c5
--- /dev/null
+++ b/host/lib/transport/nirio/CMakeLists.txt
@@ -0,0 +1,48 @@
+#
+# Copyright 2013-2014 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+# This file included, use CMake directory variables
+########################################################################
+
+########################################################################
+# Include subdirectories (different than add)
+########################################################################
+INCLUDE_SUBDIRECTORY(lvbitx)
+INCLUDE_SUBDIRECTORY(rpc)
+
+########################################################################
+# Append to the list of sources for lib uhd
+########################################################################
+
+LIBUHD_APPEND_SOURCES(
+    ${CMAKE_CURRENT_SOURCE_DIR}/nifpga_lvbitx.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/niusrprio_session.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/niriok_proxy.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/nirio_resource_manager.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/status.cpp
+)
+
+IF(WIN32)
+    LIBUHD_APPEND_SOURCES(${CMAKE_CURRENT_SOURCE_DIR}/nirio_driver_iface_win.cpp)
+ELSE(WIN32)
+    IF(APPLE)
+        LIBUHD_APPEND_SOURCES(${CMAKE_CURRENT_SOURCE_DIR}/nirio_driver_iface_macos.cpp)
+    ELSE(APPLE)
+        LIBUHD_APPEND_SOURCES(${CMAKE_CURRENT_SOURCE_DIR}/nirio_driver_iface_linux.cpp)
+    ENDIF(APPLE)
+ENDIF(WIN32)
diff --git a/host/lib/transport/nirio/lvbitx/CMakeLists.txt b/host/lib/transport/nirio/lvbitx/CMakeLists.txt
new file mode 100644
index 000000000..35cfaa456
--- /dev/null
+++ b/host/lib/transport/nirio/lvbitx/CMakeLists.txt
@@ -0,0 +1,65 @@
+#
+# Copyright 2013 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+MACRO(LIBUHD_LVBITX_GEN_SOURCE_AND_BITSTREAM lvbitx binfile)
+    GET_FILENAME_COMPONENT(lvbitxprefix ${lvbitx} NAME_WE)
+
+    IF( ${binfile} STREQUAL "OFF" )
+        SET( GEN_OPTIONS )
+        MESSAGE( STATUS "  Using ${lvbitx} for codegen" )
+    ELSE( ${binfile} STREQUAL "OFF" )
+        SET( GEN_OPTIONS --merge-bin=${CMAKE_SOURCE_DIR}/../binaries/${binfile} --output-lvbitx-path=${CMAKE_SOURCE_DIR}/../binaries )
+        MESSAGE( STATUS "  Merging ${lvbitx} with ${binfile} for codegen" )
+    ENDIF( ${binfile} STREQUAL "OFF" )
+
+    SET(OUTPUT_PATH_OPT --output-src-path=${CMAKE_CURRENT_BINARY_DIR})
+    SET(IMAGES_PATH_OPT --uhd-images-path=${FPGA_IMAGES_DIR})
+
+    ADD_CUSTOM_COMMAND(
+        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${lvbitxprefix}_lvbitx.hpp 
+        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${lvbitxprefix}_lvbitx.cpp
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/process-lvbitx.py
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/template_lvbitx.hpp
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/template_lvbitx.cpp
+        DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${lvbitx}
+        COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/process-lvbitx.py ${OUTPUT_PATH_OPT} ${IMAGES_PATH_OPT} ${GEN_OPTIONS} ${CMAKE_CURRENT_SOURCE_DIR}/${lvbitx}
+        COMMENT "Generating ${CMAKE_CURRENT_BINARY_DIR}/${lvbitxprefix}_lvbitx.cpp"
+    )
+
+    #make libuhd depend on the output file
+    LIBUHD_APPEND_SOURCES(${CMAKE_CURRENT_BINARY_DIR}/${lvbitxprefix}_lvbitx.cpp)
+ENDMACRO(LIBUHD_LVBITX_GEN_SOURCE_AND_BITSTREAM)
+
+INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})
+
+########################################################################
+# Generation code
+########################################################################
+
+MESSAGE(STATUS "")
+MESSAGE(STATUS "Processing NI-RIO FPGA LVBITX Bitstreams...")
+
+FILE(TO_NATIVE_PATH ${CMAKE_INSTALL_PREFIX}/share/uhd/images default_images_dir)
+SET( FPGA_IMAGES_DIR ${default_images_dir} CACHE STRING "Path to installed FPGA image files." )
+OPTION( FPGA_IMAGES_DIR "Path to installed FPGA image files." "" )
+MESSAGE( STATUS "  LVBITX install directory: ${FPGA_IMAGES_DIR}" )
+
+# X300 Stuff
+LIBUHD_LVBITX_GEN_SOURCE_AND_BITSTREAM(x300.lvbitx_base OFF)
+
+# X310 Stuff
+LIBUHD_LVBITX_GEN_SOURCE_AND_BITSTREAM(x310.lvbitx_base OFF)
diff --git a/host/lib/transport/nirio/lvbitx/process-lvbitx.py b/host/lib/transport/nirio/lvbitx/process-lvbitx.py
new file mode 100755
index 000000000..a3d88d0bb
--- /dev/null
+++ b/host/lib/transport/nirio/lvbitx/process-lvbitx.py
@@ -0,0 +1,185 @@
+#!/usr/bin/python
+#
+# Copyright 2013-2014 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+from xml.etree import ElementTree
+from collections import namedtuple
+import optparse
+import base64
+import hashlib
+import os
+import sys
+
+# Parse options
+parser = optparse.OptionParser()
+parser.add_option("--uhd-images-path", type="string", dest="uhd_images_path", help="Install location for UHD images", default='')
+parser.add_option("--merge-bin", type="string", dest="merge_bin", help="Path to bin file that needs to be merged with the LVBITX before exporting", default=None)
+parser.add_option("--output-bin", action="store_true", dest="output_bin", help="Generate a binary FPGA programming bitstream file", default=False)
+parser.add_option("--output-lvbitx-path", type="string", dest="output_lvbitx_path", help="Output path for autogenerated LVBITX file", default=None)
+parser.add_option("--output-src-path", type="string", dest="output_src_path", help="Output path for autogenerated src file", default=None)
+(options, args) = parser.parse_args()
+
+# Args
+if (len(args) < 1):
+    print 'ERROR: Please specify the input LVBITX file name'
+    sys.exit(1)
+
+lvbitx_filename = args[0]
+input_filename = os.path.abspath(lvbitx_filename)
+autogen_src_path = os.path.abspath(options.output_src_path) if (options.output_src_path is not None) else os.path.dirname(input_filename)
+class_name = os.path.splitext(os.path.basename(input_filename))[0]
+
+if (not os.path.isfile(input_filename)):
+    print 'ERROR: FPGA File ' + input_filename + ' could not be accessed or is not a file.'
+    sys.exit(1)
+if (options.merge_bin is not None and not os.path.isfile(os.path.abspath(options.merge_bin))):
+    print 'ERROR: FPGA Bin File ' + options.merge_bin + ' could not be accessed or is not a file.'
+    sys.exit(1)
+if (not os.path.exists(autogen_src_path)):
+    print 'ERROR: Output path ' + autogen_src_path + ' could not be accessed.'
+    sys.exit(1)
+if (options.output_lvbitx_path is not None and input_filename == os.path.join(autogen_src_path, class_name + '.lvbitx')):
+    print 'ERROR: Input and output LVBITX files were the same. Choose a difference input file or output path.'
+    sys.exit(1)
+
+# Get XML Tree Node
+tree = ElementTree.parse(input_filename)
+root = tree.getroot()
+codegen_transform = {}
+
+# General info
+codegen_transform['autogen_msg'] = '// Auto-generated file: DO NOT EDIT!\n// Generated from a LabVIEW FPGA LVBITX image using "process-lvbitx.py"'
+codegen_transform['lvbitx_search_paths'] = options.uhd_images_path.replace('\\', '\\\\')
+codegen_transform['lvbitx_classname'] = class_name
+codegen_transform['lvbitx_classname_u'] = class_name.upper()
+bitstream_version = root.find('BitstreamVersion').text
+
+# Enumerate registers (controls and indicators)
+register_list = root.find('VI').find('RegisterList')
+
+reg_init_seq = ''
+control_list = ''
+indicator_list = ''
+control_idx = 0
+indicator_idx = 0
+for register in register_list.findall('Register'):
+    reg_type = 'INDICATOR' if (register.find('Indicator').text.lower() == 'true') else 'CONTROL'
+    reg_name = '\"' + register.find('Name').text + '\"'
+
+    if (reg_type == 'INDICATOR'):
+        indicator_list += '\n    ' + reg_name + ','
+        idx = indicator_idx
+        indicator_idx += 1
+    else:
+        control_list += '\n    ' + reg_name + ','
+        idx = control_idx
+        control_idx += 1
+
+    reg_init_seq += '\n    vtr.push_back(nirio_register_info_t('
+    reg_init_seq += hex(int(register.find('Offset').text)) + ', '
+    reg_init_seq += reg_type + 'S[' + str(idx) + '], '
+    reg_init_seq += reg_type
+    reg_init_seq += ')); //' + reg_name
+
+
+codegen_transform['register_init'] = reg_init_seq
+codegen_transform['control_list'] = control_list
+codegen_transform['indicator_list'] = indicator_list
+
+# Enumerate FIFOs
+nifpga_metadata = root.find('Project').find('CompilationResultsTree').find('CompilationResults').find('NiFpga')
+dma_channel_list = nifpga_metadata.find('DmaChannelAllocationList')
+reg_block_list = nifpga_metadata.find('RegisterBlockList')
+
+fifo_init_seq = ''
+out_fifo_list = ''
+in_fifo_list = ''
+out_fifo_idx = 0
+in_fifo_idx = 0
+for dma_channel in dma_channel_list:
+    fifo_name = '\"' + dma_channel.attrib['name'] + '\"'
+    direction = 'OUTPUT_FIFO' if (dma_channel.find('Direction').text == 'HostToTarget') else 'INPUT_FIFO'
+    for reg_block in reg_block_list.findall('RegisterBlock'):
+        if (reg_block.attrib['name'] == dma_channel.find('BaseAddressTag').text):
+            base_addr = reg_block.find('Offset').text
+            break
+
+    if (direction == 'OUTPUT_FIFO'):
+        out_fifo_list += '\n    ' + fifo_name + ','
+        idx = out_fifo_idx
+        out_fifo_idx += 1
+    else:
+        in_fifo_list += '\n    ' + fifo_name + ','
+        idx = in_fifo_idx
+        in_fifo_idx += 1
+
+    fifo_init_seq += '\n    vtr.push_back(nirio_fifo_info_t('
+    fifo_init_seq += dma_channel.find('Number').text + ', '
+    fifo_init_seq += direction + 'S[' + str(idx) + '], '
+    fifo_init_seq += direction + ', '
+    fifo_init_seq += str.lower(base_addr) + ', '
+    fifo_init_seq += dma_channel.find('NumberOfElements').text + ', '
+    fifo_init_seq += 'SCALAR_' + dma_channel.find('DataType').find('SubType').text + ', '
+    fifo_init_seq += dma_channel.find('DataType').find('WordLength').text + ', '
+    fifo_init_seq += bitstream_version
+    fifo_init_seq += ')); //' + fifo_name
+
+
+codegen_transform['fifo_init'] = fifo_init_seq
+codegen_transform['out_fifo_list'] = out_fifo_list
+codegen_transform['in_fifo_list'] = in_fifo_list
+
+# Merge bitstream into LVBITX
+if (options.merge_bin is not None):
+    with open(os.path.abspath(options.merge_bin), 'rb') as bin_file:
+        bitstream = bin_file.read()
+        bitstream_md5 = hashlib.md5(bitstream).hexdigest()
+        bitstream_b64 = base64.b64encode(bitstream)
+        bitstream_b64_lb = ''
+        for i in range(0, len(bitstream_b64), 76):
+            bitstream_b64_lb += bitstream_b64[i:i+76] + '\n'
+
+        root.find('Bitstream').text = bitstream_b64_lb
+        root.find('BitstreamMD5').text = bitstream_md5
+
+codegen_transform['lvbitx_signature'] = str.upper(root.find('SignatureRegister').text)
+
+# Write BIN file
+bitstream = base64.b64decode(root.find('Bitstream').text)
+if (options.output_lvbitx_path is not None and hashlib.md5(bitstream).hexdigest() != root.find('BitstreamMD5').text):
+    print 'ERROR: The MD5 sum for the output LVBITX was incorrect. Make sure that the bitstream in the input LVBITX or BIN file is valid.'
+    sys.exit(1)
+if (options.output_bin):
+    fpga_bin_file = open(os.path.join(options.output_lvbitx_path, class_name + '.bin'), 'w')
+    fpga_bin_file.write(bitstream)
+    fpga_bin_file.close()
+
+# Save LVBITX
+if (options.output_lvbitx_path is not None):
+    tree.write(os.path.join(options.output_lvbitx_path, class_name + '_fpga.lvbitx'), encoding="utf-8", xml_declaration=True, default_namespace=None, method="xml")
+
+# Save HPP and CPP
+with open(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'template_lvbitx.hpp'), 'r') as template_file:
+    template_string = template_file.read()
+with open(os.path.join(autogen_src_path, class_name + '_lvbitx.hpp'), 'w') as source_file:
+    source_file.write(template_string.format(**codegen_transform))
+
+with open(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'template_lvbitx.cpp'), 'r') as template_file:
+    template_string = template_file.read()
+with open(os.path.join(autogen_src_path, class_name + '_lvbitx.cpp'), 'w') as source_file:
+    source_file.write(template_string.format(**codegen_transform))
+
diff --git a/host/lib/transport/nirio/lvbitx/template_lvbitx.cpp b/host/lib/transport/nirio/lvbitx/template_lvbitx.cpp
new file mode 100644
index 000000000..a1899c771
--- /dev/null
+++ b/host/lib/transport/nirio/lvbitx/template_lvbitx.cpp
@@ -0,0 +1,86 @@
+{autogen_msg}
+
+#include "{lvbitx_classname}_lvbitx.hpp"
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <streambuf>
+#include <boost/filesystem/path.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/regex.hpp>
+
+namespace uhd {{ namespace niusrprio {{
+
+#define SEARCH_PATHS "{lvbitx_search_paths}"
+
+const char* {lvbitx_classname}_lvbitx::CONTROLS[] = {{{control_list}
+}};
+
+const char* {lvbitx_classname}_lvbitx::INDICATORS[] = {{{indicator_list}
+}};
+
+const char* {lvbitx_classname}_lvbitx::OUTPUT_FIFOS[] = {{{out_fifo_list}
+}};
+
+const char* {lvbitx_classname}_lvbitx::INPUT_FIFOS[] = {{{in_fifo_list}
+}};
+
+{lvbitx_classname}_lvbitx::{lvbitx_classname}_lvbitx(const std::string& option)
+{{
+    boost::filesystem::path fpga_path(_get_fpga_images_dir(SEARCH_PATHS));
+    fpga_path /= "usrp_{lvbitx_classname}_fpga_" + option + ".lvbitx";
+    _fpga_file_name = fpga_path.string();
+    _bitstream_checksum = _get_bitstream_checksum(_fpga_file_name);
+}}
+
+const char* {lvbitx_classname}_lvbitx::get_bitfile_path() {{
+    return _fpga_file_name.c_str();
+}}
+
+const char* {lvbitx_classname}_lvbitx::get_signature() {{
+    return "{lvbitx_signature}";
+}}
+
+const char* {lvbitx_classname}_lvbitx::get_bitstream_checksum() {{
+    return _bitstream_checksum.c_str();
+}}
+
+size_t {lvbitx_classname}_lvbitx::get_input_fifo_count() {{
+    return sizeof(INPUT_FIFOS)/sizeof(*INPUT_FIFOS);
+}}
+
+const char** {lvbitx_classname}_lvbitx::get_input_fifo_names() {{
+    return INPUT_FIFOS;
+}}
+
+size_t {lvbitx_classname}_lvbitx::get_output_fifo_count() {{
+    return sizeof(OUTPUT_FIFOS)/sizeof(*OUTPUT_FIFOS);
+}}
+
+const char** {lvbitx_classname}_lvbitx::get_output_fifo_names() {{
+    return OUTPUT_FIFOS;
+}}
+
+size_t {lvbitx_classname}_lvbitx::get_control_count() {{
+    return sizeof(CONTROLS)/sizeof(*CONTROLS);
+}}
+
+const char** {lvbitx_classname}_lvbitx::get_control_names() {{
+    return CONTROLS;
+}}
+
+size_t {lvbitx_classname}_lvbitx::get_indicator_count() {{
+    return sizeof(INDICATORS)/sizeof(*INDICATORS);
+}}
+
+const char** {lvbitx_classname}_lvbitx::get_indicator_names() {{
+    return INDICATORS;
+}}
+
+void {lvbitx_classname}_lvbitx::init_register_info(nirio_register_info_vtr& vtr) {{ {register_init}
+}}
+
+void {lvbitx_classname}_lvbitx::init_fifo_info(nirio_fifo_info_vtr& vtr) {{ {fifo_init}
+}}
+
+}}}}
diff --git a/host/lib/transport/nirio/lvbitx/template_lvbitx.hpp b/host/lib/transport/nirio/lvbitx/template_lvbitx.hpp
new file mode 100644
index 000000000..d8872e15c
--- /dev/null
+++ b/host/lib/transport/nirio/lvbitx/template_lvbitx.hpp
@@ -0,0 +1,48 @@
+{autogen_msg}
+
+#ifndef INCLUDED_{lvbitx_classname_u}_LVBITX_HPP
+#define INCLUDED_{lvbitx_classname_u}_LVBITX_HPP
+
+#include <uhd/transport/nirio/nifpga_lvbitx.h>
+
+namespace uhd {{ namespace niusrprio {{
+
+class {lvbitx_classname}_lvbitx : public nifpga_lvbitx {{
+public:
+    {lvbitx_classname}_lvbitx(const std::string& option);
+
+    virtual ~{lvbitx_classname}_lvbitx() {{}};
+
+    virtual const char* get_bitfile_path();
+    virtual const char* get_signature();
+    virtual const char* get_bitstream_checksum();
+
+    virtual size_t get_input_fifo_count();
+    virtual const char** get_input_fifo_names();
+
+    virtual size_t get_output_fifo_count();
+    virtual const char** get_output_fifo_names();
+
+    virtual size_t get_control_count();
+    virtual const char** get_control_names();
+
+    virtual size_t get_indicator_count();
+    virtual const char** get_indicator_names();
+
+    virtual void init_register_info(nirio_register_info_vtr& vtr);
+    virtual void init_fifo_info(nirio_fifo_info_vtr& vtr);
+
+    static const char* CONTROLS[];
+    static const char* INDICATORS[];
+    static const char* OUTPUT_FIFOS[];
+    static const char* INPUT_FIFOS[];
+
+private:
+    std::string _fpga_file_name;
+    std::string _bitstream_checksum;
+}};
+
+}}}}
+
+#endif /* INCLUDED_{lvbitx_classname_u}_LVBITX_HPP */
+
diff --git a/host/lib/transport/nirio/lvbitx/x300.lvbitx_base b/host/lib/transport/nirio/lvbitx/x300.lvbitx_base
new file mode 100755
index 000000000..c264e7157
--- /dev/null
+++ b/host/lib/transport/nirio/lvbitx/x300.lvbitx_base
@@ -0,0 +1,469 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Bitfile>
+  <BitfileVersion>4.0</BitfileVersion>
+  <Documentation>
+    <BuildSpecVersion/>
+    <BuildSpecDescription/>
+  </Documentation>
+  <SignatureRegister>97C6D9F4F4829001B83378F93CAB0C94</SignatureRegister>
+  <SignatureGuids>7BAD6AEB9741248079F13147B3F8AD94</SignatureGuids>
+  <SignatureNames>AE54C47F787D92DB46F7DC973338D786</SignatureNames>
+  <TimeStamp/>
+  <CompilationStatus/>
+  <BitstreamVersion>2</BitstreamVersion>
+  <VI>
+    <Name>USRP_X3x0_Top.vi</Name>
+    <RegisterList>
+      <Register>
+        <Name>ViSignature</Name>
+        <Hidden>true</Hidden>
+        <Indicator>true</Indicator>
+        <Datatype>
+          <Array>
+            <Name/>
+            <Size>4</Size>
+            <Type>
+              <U32>
+                <Name/>
+              </U32>
+            </Type>
+          </Array>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262132</Offset>
+        <SizeInBits>128</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>false</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>DiagramReset</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262140</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>ViControl</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262136</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>InterruptEnable</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262116</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>InterruptMask</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262124</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>InterruptStatus</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262128</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+    </RegisterList>
+    <Icon>
+      <ImageType>0</ImageType>
+      <ImageDepth>8</ImageDepth>
+      <Image>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</Image>
+      <Mask>//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////8=</Mask>
+      <Colors>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</Colors>
+      <Rectangle>
+        <Left>0</Left>
+        <Top>0</Top>
+        <Right>32</Right>
+        <Bottom>32</Bottom>
+      </Rectangle>
+    </Icon>
+  </VI>
+  <Project>
+    <TargetClass>294XR; 295XR</TargetClass>
+    <AutoRunWhenDownloaded>false</AutoRunWhenDownloaded>
+    <CompilationResultsTree>
+      <CompilationResults>
+        <NiFpga>
+          <BaseAddressOnDevice>0</BaseAddressOnDevice>
+          <DmaChannelAllocationList>
+            <Channel name="RX FIFO 0">
+              <BaseAddressTag>NiLvFpgaFIFO 0</BaseAddressTag>
+              <ControlSet>0</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>0</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 1">
+              <BaseAddressTag>NiLvFpgaFIFO 1</BaseAddressTag>
+              <ControlSet>1</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>1</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 2">
+              <BaseAddressTag>NiLvFpgaFIFO 2</BaseAddressTag>
+              <ControlSet>2</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>2</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 3">
+              <BaseAddressTag>NiLvFpgaFIFO 3</BaseAddressTag>
+              <ControlSet>3</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>3</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 4">
+              <BaseAddressTag>NiLvFpgaFIFO 4</BaseAddressTag>
+              <ControlSet>4</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>4</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 5">
+              <BaseAddressTag>NiLvFpgaFIFO 5</BaseAddressTag>
+              <ControlSet>5</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>5</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 0">
+              <BaseAddressTag>NiLvFpgaFIFO 6</BaseAddressTag>
+              <ControlSet>6</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>6</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 1">
+              <BaseAddressTag>NiLvFpgaFIFO 7</BaseAddressTag>
+              <ControlSet>7</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>7</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 2">
+              <BaseAddressTag>NiLvFpgaFIFO 8</BaseAddressTag>
+              <ControlSet>8</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>8</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 3">
+              <BaseAddressTag>NiLvFpgaFIFO 9</BaseAddressTag>
+              <ControlSet>9</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>9</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 4">
+              <BaseAddressTag>NiLvFpgaFIFO 10</BaseAddressTag>
+              <ControlSet>10</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>10</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 5">
+              <BaseAddressTag>NiLvFpgaFIFO 11</BaseAddressTag>
+              <ControlSet>11</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>11</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+          </DmaChannelAllocationList>
+          <RegisterBlockList>
+            <RegisterBlock name="NiLvFpgaFIFO 0">
+              <Offset>0xFF80</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 1">
+              <Offset>0xFF40</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 2">
+              <Offset>0xFF00</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 3">
+              <Offset>0xFEC0</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 4">
+              <Offset>0xFE80</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 5">
+              <Offset>0xFE40</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 6">
+              <Offset>0xFE00</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 7">
+              <Offset>0xFDC0</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 8">
+              <Offset>0xFD80</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 9">
+              <Offset>0xFD40</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 10">
+              <Offset>0xFD00</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 11">
+              <Offset>0xFCC0</Offset>
+            </RegisterBlock>
+          </RegisterBlockList>
+          <UsedBaseClockList>
+            <BaseClock name="ReliableClkIn">
+         </BaseClock>
+            <BaseClock name="ChinchClk">
+         </BaseClock>
+            <BaseClock name="40 MHz Onboard Clock">
+         </BaseClock>
+          </UsedBaseClockList>
+          <version>1</version>
+        </NiFpga>
+      </CompilationResults>
+    </CompilationResultsTree>
+    <MultipleUserClocks>false</MultipleUserClocks>
+    <AllowImplicitEnableRemoval>false</AllowImplicitEnableRemoval>
+  </Project>
+  <ClientData/>
+  <BitstreamMD5>a72ba1716893a0bd02f88dac3ab28e1b</BitstreamMD5>
+  <Bitstream>a72ba1716893a0bd02f88dac3ab28e1b</Bitstream>
+</Bitfile>
diff --git a/host/lib/transport/nirio/lvbitx/x310.lvbitx_base b/host/lib/transport/nirio/lvbitx/x310.lvbitx_base
new file mode 100755
index 000000000..c264e7157
--- /dev/null
+++ b/host/lib/transport/nirio/lvbitx/x310.lvbitx_base
@@ -0,0 +1,469 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Bitfile>
+  <BitfileVersion>4.0</BitfileVersion>
+  <Documentation>
+    <BuildSpecVersion/>
+    <BuildSpecDescription/>
+  </Documentation>
+  <SignatureRegister>97C6D9F4F4829001B83378F93CAB0C94</SignatureRegister>
+  <SignatureGuids>7BAD6AEB9741248079F13147B3F8AD94</SignatureGuids>
+  <SignatureNames>AE54C47F787D92DB46F7DC973338D786</SignatureNames>
+  <TimeStamp/>
+  <CompilationStatus/>
+  <BitstreamVersion>2</BitstreamVersion>
+  <VI>
+    <Name>USRP_X3x0_Top.vi</Name>
+    <RegisterList>
+      <Register>
+        <Name>ViSignature</Name>
+        <Hidden>true</Hidden>
+        <Indicator>true</Indicator>
+        <Datatype>
+          <Array>
+            <Name/>
+            <Size>4</Size>
+            <Type>
+              <U32>
+                <Name/>
+              </U32>
+            </Type>
+          </Array>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262132</Offset>
+        <SizeInBits>128</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>false</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>DiagramReset</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262140</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>ViControl</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262136</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>InterruptEnable</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262116</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>InterruptMask</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262124</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+      <Register>
+        <Name>InterruptStatus</Name>
+        <Hidden>false</Hidden>
+        <Indicator>false</Indicator>
+        <Datatype>
+          <U32>
+            <Name/>
+          </U32>
+        </Datatype>
+        <FlattenedType/>
+        <Grouping/>
+        <Offset>262128</Offset>
+        <SizeInBits>32</SizeInBits>
+        <Class>0</Class>
+        <Internal>true</Internal>
+        <TypedefPath/>
+        <TypedefRelativePath/>
+        <ID>0</ID>
+        <Bidirectional>true</Bidirectional>
+        <Synchronous>false</Synchronous>
+        <MechanicalAction>Switch When Pressed</MechanicalAction>
+        <AccessMayTimeout>false</AccessMayTimeout>
+        <RegisterNode>false</RegisterNode>
+        <SubControlList/>
+      </Register>
+    </RegisterList>
+    <Icon>
+      <ImageType>0</ImageType>
+      <ImageDepth>8</ImageDepth>
+      <Image>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</Image>
+      <Mask>//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////8=</Mask>
+      <Colors>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</Colors>
+      <Rectangle>
+        <Left>0</Left>
+        <Top>0</Top>
+        <Right>32</Right>
+        <Bottom>32</Bottom>
+      </Rectangle>
+    </Icon>
+  </VI>
+  <Project>
+    <TargetClass>294XR; 295XR</TargetClass>
+    <AutoRunWhenDownloaded>false</AutoRunWhenDownloaded>
+    <CompilationResultsTree>
+      <CompilationResults>
+        <NiFpga>
+          <BaseAddressOnDevice>0</BaseAddressOnDevice>
+          <DmaChannelAllocationList>
+            <Channel name="RX FIFO 0">
+              <BaseAddressTag>NiLvFpgaFIFO 0</BaseAddressTag>
+              <ControlSet>0</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>0</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 1">
+              <BaseAddressTag>NiLvFpgaFIFO 1</BaseAddressTag>
+              <ControlSet>1</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>1</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 2">
+              <BaseAddressTag>NiLvFpgaFIFO 2</BaseAddressTag>
+              <ControlSet>2</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>2</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 3">
+              <BaseAddressTag>NiLvFpgaFIFO 3</BaseAddressTag>
+              <ControlSet>3</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>3</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 4">
+              <BaseAddressTag>NiLvFpgaFIFO 4</BaseAddressTag>
+              <ControlSet>4</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>4</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="RX FIFO 5">
+              <BaseAddressTag>NiLvFpgaFIFO 5</BaseAddressTag>
+              <ControlSet>5</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>TargetToHost</Direction>
+              <Implementation>niFpgaTargetToHost</Implementation>
+              <Number>5</Number>
+              <NumberOfElements>1023</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 0">
+              <BaseAddressTag>NiLvFpgaFIFO 6</BaseAddressTag>
+              <ControlSet>6</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>6</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 1">
+              <BaseAddressTag>NiLvFpgaFIFO 7</BaseAddressTag>
+              <ControlSet>7</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>7</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 2">
+              <BaseAddressTag>NiLvFpgaFIFO 8</BaseAddressTag>
+              <ControlSet>8</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>8</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 3">
+              <BaseAddressTag>NiLvFpgaFIFO 9</BaseAddressTag>
+              <ControlSet>9</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>9</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 4">
+              <BaseAddressTag>NiLvFpgaFIFO 10</BaseAddressTag>
+              <ControlSet>10</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>10</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+            <Channel name="TX FIFO 5">
+              <BaseAddressTag>NiLvFpgaFIFO 11</BaseAddressTag>
+              <ControlSet>11</ControlSet>
+              <DataType>
+                <Delta>1.000000000000000000000000000000000000000000000000000000</Delta>
+                <IntegerWordLength>64</IntegerWordLength>
+                <Maximum>18446744073709551600.00000000000000000000000000000000000</Maximum>
+                <Minimum>0.000000000000000000000000000000000000000000000000000000</Minimum>
+                <Signed>false</Signed>
+                <SubType>U64</SubType>
+                <WordLength>64</WordLength>
+              </DataType>
+              <Direction>HostToTarget</Direction>
+              <Implementation>niFpgaHostToTarget</Implementation>
+              <Number>11</Number>
+              <NumberOfElements>1029</NumberOfElements>
+              <UserVisible>true</UserVisible>
+            </Channel>
+          </DmaChannelAllocationList>
+          <RegisterBlockList>
+            <RegisterBlock name="NiLvFpgaFIFO 0">
+              <Offset>0xFF80</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 1">
+              <Offset>0xFF40</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 2">
+              <Offset>0xFF00</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 3">
+              <Offset>0xFEC0</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 4">
+              <Offset>0xFE80</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 5">
+              <Offset>0xFE40</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 6">
+              <Offset>0xFE00</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 7">
+              <Offset>0xFDC0</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 8">
+              <Offset>0xFD80</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 9">
+              <Offset>0xFD40</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 10">
+              <Offset>0xFD00</Offset>
+            </RegisterBlock>
+            <RegisterBlock name="NiLvFpgaFIFO 11">
+              <Offset>0xFCC0</Offset>
+            </RegisterBlock>
+          </RegisterBlockList>
+          <UsedBaseClockList>
+            <BaseClock name="ReliableClkIn">
+         </BaseClock>
+            <BaseClock name="ChinchClk">
+         </BaseClock>
+            <BaseClock name="40 MHz Onboard Clock">
+         </BaseClock>
+          </UsedBaseClockList>
+          <version>1</version>
+        </NiFpga>
+      </CompilationResults>
+    </CompilationResultsTree>
+    <MultipleUserClocks>false</MultipleUserClocks>
+    <AllowImplicitEnableRemoval>false</AllowImplicitEnableRemoval>
+  </Project>
+  <ClientData/>
+  <BitstreamMD5>a72ba1716893a0bd02f88dac3ab28e1b</BitstreamMD5>
+  <Bitstream>a72ba1716893a0bd02f88dac3ab28e1b</Bitstream>
+</Bitfile>
diff --git a/host/lib/transport/nirio/nifpga_lvbitx.cpp b/host/lib/transport/nirio/nifpga_lvbitx.cpp
new file mode 100644
index 000000000..289a44d4a
--- /dev/null
+++ b/host/lib/transport/nirio/nifpga_lvbitx.cpp
@@ -0,0 +1,138 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/transport/nirio/nifpga_lvbitx.h>
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <streambuf>
+#include <boost/foreach.hpp>
+#include <boost/format.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/regex.hpp>
+
+namespace uhd { namespace niusrprio {
+
+std::string nifpga_lvbitx::_get_bitstream_checksum(const std::string& file_path)
+{
+    std::string checksum;
+    std::ifstream lvbitx_stream(file_path.c_str());
+    if (lvbitx_stream.is_open()) {
+        std::string lvbitx_contents;
+        lvbitx_stream.seekg(0, std::ios::end);
+        lvbitx_contents.reserve(static_cast<size_t>(lvbitx_stream.tellg()));
+        lvbitx_stream.seekg(0, std::ios::beg);
+        lvbitx_contents.assign((std::istreambuf_iterator<char>(lvbitx_stream)), std::istreambuf_iterator<char>());
+        try {
+            boost::smatch md5_match;
+            if (boost::regex_search(lvbitx_contents, md5_match, boost::regex("<BitstreamMD5>([a-zA-Z0-9]{32})<\\/BitstreamMD5>", boost::regex::icase))) {
+                checksum = std::string(md5_match[1].first, md5_match[1].second);
+            }
+        } catch (boost::exception&) {
+            checksum = "";
+        }
+    }
+    boost::to_upper(checksum);
+    return checksum;
+}
+
+#ifdef UHD_PLATFORM_WIN32
+#include <windows.h>
+
+std::string _get_path_from_registry(const std::string& registry_key_path)
+{
+    boost::smatch reg_key_match;
+    //If a substring in the search path is enclosed in [] (square brackets) then it is interpreted as a registry path
+    if (not boost::regex_search(registry_key_path, reg_key_match, boost::regex("\\[(.+)\\](.*)", boost::regex::icase)))
+        return std::string();
+    std::string reg_key_path = std::string(reg_key_match[1].first, reg_key_match[1].second);
+    std::string path_suffix = std::string(reg_key_match[2].first, reg_key_match[2].second);
+
+    //Split the registry path into parent, key-path and value.
+    boost::smatch reg_parent_match;
+    if (not boost::regex_search(reg_key_path, reg_parent_match, boost::regex("^(.+?)\\\\(.+)\\\\(.+)$", boost::regex::icase)))
+        return std::string();
+    std::string reg_parent = std::string(reg_parent_match[1].first, reg_parent_match[1].second);
+    std::string reg_path = std::string(reg_parent_match[2].first, reg_parent_match[2].second);
+    std::string reg_val_name = std::string(reg_parent_match[3].first, reg_parent_match[3].second);
+
+    HKEY hkey_parent = HKEY_LOCAL_MACHINE;
+    if      (reg_parent == "HKEY_LOCAL_MACHINE")    hkey_parent = HKEY_LOCAL_MACHINE;
+    else if (reg_parent == "HKEY_CURRENT_USER")     hkey_parent = HKEY_CURRENT_USER;
+    else if (reg_parent == "HKEY_CLASSES_ROOT")     hkey_parent = HKEY_CLASSES_ROOT;
+    else if (reg_parent == "HKEY_CURRENT_CONFIG")   hkey_parent = HKEY_CURRENT_CONFIG;
+    else if (reg_parent == "HKEY_USERS")            hkey_parent = HKEY_CURRENT_USER;
+
+    TCHAR value_buff[1024];
+    DWORD value_buff_size = 1024*sizeof(TCHAR);
+
+    //Get a handle to the key location
+    HKEY hkey_location;
+    if (RegOpenKeyExA(hkey_parent, reg_path.c_str(), NULL, KEY_QUERY_VALUE, &hkey_location) != ERROR_SUCCESS)
+        return std::string();
+
+    //Query key value
+    DWORD dw_type = REG_SZ;
+    if(RegQueryValueExA(hkey_location, reg_val_name.c_str(), NULL, &dw_type, (LPBYTE)value_buff, &value_buff_size) == ERROR_SUCCESS) {
+        RegCloseKey(hkey_location);
+        if (value_buff_size >= 1024*sizeof(TCHAR)) {
+            return std::string();
+        } else {
+            std::string return_value(value_buff, value_buff_size-1); //value_buff_size includes the null terminator
+            return_value += path_suffix;
+            return return_value;
+        }
+    } else {
+        return std::string();
+    }
+}
+
+#endif  /*UHD_PLATFORM_WIN32*/
+
+std::string nifpga_lvbitx::_get_fpga_images_dir(const std::string search_paths)
+{
+    std::vector<std::string> search_path_vtr;
+    boost::split(search_path_vtr, search_paths, boost::is_any_of(","));
+
+    std::string lvbitx_dir;
+    //Traverse through the list of search paths. Priority: lexical
+    BOOST_FOREACH(std::string& search_path, search_path_vtr) {
+        boost::algorithm::trim(search_path);
+        if (search_path.empty()) continue;
+
+#ifdef UHD_PLATFORM_WIN32
+        lvbitx_dir = _get_path_from_registry(search_path);
+        if (lvbitx_dir.empty()) {
+            //Could not read from the registry due to missing key, invalid values, etc
+            //Just use the search path. The is_directory check will fail if this is a
+            //registry path and we will move on to the next item in the list.
+            lvbitx_dir = search_path;
+        }
+#else
+        lvbitx_dir = search_path;
+#endif
+
+        //If the current directory exists then stop traversing the search path list.
+        if (boost::filesystem::is_directory(lvbitx_dir)) break;
+    }
+
+    return lvbitx_dir;
+}
+
+
+}}
diff --git a/host/lib/transport/nirio/nirio_driver_iface_linux.cpp b/host/lib/transport/nirio/nirio_driver_iface_linux.cpp
new file mode 100644
index 000000000..b1f4bb49f
--- /dev/null
+++ b/host/lib/transport/nirio/nirio_driver_iface_linux.cpp
@@ -0,0 +1,111 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/transport/nirio/nirio_driver_iface.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+
+namespace nirio_driver_iface {
+
+nirio_status rio_open(
+    const std::string& device_path,
+    rio_dev_handle_t& device_handle)
+{
+    device_handle = ::open(device_path.c_str(), O_RDWR | O_CLOEXEC);
+    return (device_handle < 0) ? NiRio_Status_InvalidParameter : NiRio_Status_Success;
+}
+
+void rio_close(rio_dev_handle_t& device_handle)
+{
+    ::close(device_handle);
+    device_handle = -1;
+}
+
+bool rio_isopen(rio_dev_handle_t device_handle)
+{
+    return (device_handle >= 0);
+}
+
+nirio_status rio_ioctl(
+    rio_dev_handle_t device_handle,
+    uint32_t ioctl_code,
+    const void *write_buf,
+    size_t write_buf_len,
+    void *read_buf,
+    size_t read_buf_len)
+{
+    nirio_ioctl_block_t ioctl_block = {0,0,0,0,0,0};
+
+    // two-casts necessary to prevent pointer sign-extension
+    ioctl_block.inBuf        = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(write_buf));
+    ioctl_block.inBufLength  = write_buf_len;
+    ioctl_block.outBuf       = static_cast<uint64_t>(reinterpret_cast<uintptr_t>(read_buf));
+    ioctl_block.outBufLength = read_buf_len;
+
+    int status = ::ioctl(device_handle, ioctl_code, &ioctl_block);
+    if (status == -1) {
+        switch (errno) {
+            case EINVAL:    return NiRio_Status_InvalidParameter;
+            case EFAULT:    return NiRio_Status_MemoryFull;
+            default:        return NiRio_Status_SoftwareFault;
+        }
+    } else {
+        return NiRio_Status_Success;
+    }
+}
+
+nirio_status rio_mmap(
+    rio_dev_handle_t device_handle,
+    uint16_t memory_type,
+    size_t size,
+    bool writable,
+    rio_mmap_t &map)
+{
+    int access_mode = PROT_READ;    //Write-only mode not supported
+    if (writable) access_mode |= PROT_WRITE;
+    map.addr = ::mmap(NULL, size, access_mode, MAP_SHARED, device_handle, (off_t) memory_type * sysconf(_SC_PAGESIZE));
+    map.size = size;
+
+    if (map.addr == MAP_FAILED)    {
+        map.addr = NULL;
+        map.size = 0;
+        switch (errno) {
+            case EINVAL:    return NiRio_Status_InvalidParameter;
+            case EFAULT:    return NiRio_Status_MemoryFull;
+            default:        return NiRio_Status_SoftwareFault;
+        }
+    }
+    return NiRio_Status_Success;
+}
+
+nirio_status rio_munmap(rio_mmap_t &map)
+{
+    nirio_status status = 0;
+    if (map.addr != NULL) {
+        status = ::munmap(map.addr, map.size);
+
+        map.addr = NULL;
+        map.size = 0;
+    }
+    return status;
+}
+
+}
diff --git a/host/lib/transport/nirio/nirio_driver_iface_macos.cpp b/host/lib/transport/nirio/nirio_driver_iface_macos.cpp
new file mode 100644
index 000000000..1a1142525
--- /dev/null
+++ b/host/lib/transport/nirio/nirio_driver_iface_macos.cpp
@@ -0,0 +1,63 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+#include <uhd/transport/nirio/nirio_driver_iface.h>
+
+namespace nirio_driver_iface {
+
+nirio_status rio_open(
+    const std::string& device_path,
+    rio_dev_handle_t& device_handle)
+{
+    return NiRio_Status_FeatureNotSupported;
+}
+
+void rio_close(rio_dev_handle_t& device_handle)
+{
+}
+
+bool rio_isopen(rio_dev_handle_t device_handle)
+{
+    return false;
+}
+
+nirio_status rio_ioctl(
+    rio_dev_handle_t device_handle,
+    uint32_t ioctl_code,
+    const void *write_buf,
+    size_t write_buf_len,
+    void *read_buf,
+    size_t read_buf_len)
+{
+    return NiRio_Status_FeatureNotSupported;
+}
+
+nirio_status rio_mmap(
+    rio_dev_handle_t device_handle,
+    uint16_t memory_type,
+    size_t size,
+    bool writable,
+    rio_mmap_t &map)
+{
+    return NiRio_Status_FeatureNotSupported;
+}
+
+nirio_status rio_munmap(rio_mmap_t &map)
+{
+    return NiRio_Status_FeatureNotSupported;
+}
+
+}
diff --git a/host/lib/transport/nirio/nirio_driver_iface_win.cpp b/host/lib/transport/nirio/nirio_driver_iface_win.cpp
new file mode 100644
index 000000000..b47c6ce85
--- /dev/null
+++ b/host/lib/transport/nirio/nirio_driver_iface_win.cpp
@@ -0,0 +1,148 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/transport/nirio/nirio_driver_iface.h>
+#include <process.h>
+
+#define NIRIO_IOCTL_MAP_MEMORY CTL_CODE(FILE_DEVICE_UNKNOWN, 0xF00, METHOD_BUFFERED, (FILE_READ_ACCESS | FILE_WRITE_ACCESS))
+#define NIRIO_IOCTL_UNMAP_MEMORY CTL_CODE(FILE_DEVICE_UNKNOWN, 0xF01, METHOD_BUFFERED, (FILE_READ_ACCESS | FILE_WRITE_ACCESS))
+
+namespace nirio_driver_iface {
+
+nirio_status rio_open(
+    const std::string& device_path,
+    rio_dev_handle_t& device_handle)
+{
+    device_handle = CreateFileA(device_path.c_str(), GENERIC_READ | GENERIC_WRITE,
+                                FILE_SHARE_READ | FILE_SHARE_WRITE, NULL,  /* default security */
+                                OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL /* template file */);
+
+    return (device_handle == INVALID_HANDLE_VALUE) ? NiRio_Status_InvalidParameter : NiRio_Status_Success;
+}
+
+void rio_close(rio_dev_handle_t& device_handle)
+{
+    ::CloseHandle(device_handle);
+    device_handle = INVALID_HANDLE_VALUE;
+}
+
+bool rio_isopen(rio_dev_handle_t device_handle)
+{
+    return (device_handle != INVALID_HANDLE_VALUE);
+}
+
+nirio_status rio_ioctl(
+    rio_dev_handle_t device_handle,
+    uint32_t ioctl_code,
+    const void *write_buf,
+    size_t write_buf_len,
+    void *read_buf,
+    size_t read_buf_len)
+{
+    if (!rio_isopen(device_handle)) return NiRio_Status_ResourceNotInitialized;
+
+    /* Note, if the file handle was opened with the OVERLAPPED flag,  you must
+    * supply an OVERLAPPED structure to ReadFile, WriteFile, and
+    * DeviceIoControl, even when doing synchronous IO. */
+    OVERLAPPED zeroedOverlapped = {0};
+    DWORD outLen = 0;
+    int_fast32_t lastError = 0;
+
+    if (!(DeviceIoControl(device_handle, ioctl_code,
+            const_cast<void*>(write_buf), static_cast<DWORD>(write_buf_len),
+            read_buf, static_cast<DWORD>(read_buf_len),
+            &outLen, &zeroedOverlapped )))
+    {
+        lastError = GetLastError();
+        return NiRio_Status_SoftwareFault;
+    }
+
+    return NiRio_Status_Success;
+}
+
+unsigned int __stdcall memory_map_thread_routine(void *context)
+{
+    rio_mmap_threadargs_t *args = (rio_mmap_threadargs_t*)context;
+    args->status = rio_ioctl(args->device_handle, NIRIO_IOCTL_MAP_MEMORY, &(args->params), sizeof(args->params), NULL, 0);
+    if (nirio_status_fatal(args->status))
+    {
+        SetEvent(reinterpret_cast<HANDLE>(args->params.map_ready_event_handle));
+    }
+    return 0;
+}
+
+nirio_status rio_mmap(
+    rio_dev_handle_t device_handle,
+    uint16_t memory_type,
+    size_t size,
+    bool writable,
+    rio_mmap_t &map)
+{
+    if (!rio_isopen(device_handle)) return NiRio_Status_ResourceNotInitialized;
+
+    access_mode_t access_mode = writable ? ACCESS_MODE_WRITE : ACCESS_MODE_READ;
+
+    uint64_t mapped_addr = 0;
+    map.map_thread_args.device_handle = device_handle;
+    map.map_thread_args.status = NiRio_Status_Success;
+    map.map_thread_args.params.memoryType = memory_type;
+    map.map_thread_args.params.size = (uint32_t)size;
+    map.map_thread_args.params.mapped_va_ptr = reinterpret_cast<uintptr_t>(&mapped_addr);
+    map.map_thread_args.params.access_mode = (uint8_t)access_mode;
+    HANDLE map_ready_event_handle = CreateEventA(NULL, TRUE, FALSE, NULL);
+    if (map_ready_event_handle == NULL) {
+        map.addr = NULL;
+        return NiRio_Status_SoftwareFault;
+    }
+    map.map_thread_args.params.map_ready_event_handle = reinterpret_cast<uint64_t>(map_ready_event_handle);
+    map.map_thread_handle = (HANDLE) _beginthreadex(NULL, 0, memory_map_thread_routine, &(map.map_thread_args), 0, NULL);
+
+    nirio_status status = NiRio_Status_Success;
+    if (map.map_thread_handle == NULL) {
+        map.addr = NULL;
+        return NiRio_Status_SoftwareFault;
+    } else {
+        WaitForSingleObject(map_ready_event_handle, INFINITE);
+        map.addr = reinterpret_cast<void*>(mapped_addr);
+        if (map.addr == NULL) {
+            WaitForSingleObject(map.map_thread_handle, INFINITE);
+            CloseHandle(map.map_thread_handle);
+            nirio_status_chain(map.map_thread_args.status, status);
+        }
+    }
+    CloseHandle(map_ready_event_handle);
+    return status;
+}
+
+nirio_status rio_munmap(rio_mmap_t &map)
+{
+    if (!rio_isopen(map.map_thread_args.device_handle)) return NiRio_Status_ResourceNotInitialized;
+
+    nirio_status status = NiRio_Status_Success;
+    if (map.addr != NULL) {
+        uint64_t mapped_addr = reinterpret_cast<uintptr_t>(map.addr);
+        status = rio_ioctl(map.map_thread_args.device_handle, NIRIO_IOCTL_UNMAP_MEMORY, &mapped_addr, sizeof(mapped_addr), NULL, 0);
+        if (nirio_status_not_fatal(status)) {
+            WaitForSingleObject(map.map_thread_handle, INFINITE);
+        }
+        CloseHandle(map.map_thread_handle);
+        map.addr = NULL;
+    }
+    return status;
+}
+
+}
diff --git a/host/lib/transport/nirio/nirio_resource_manager.cpp b/host/lib/transport/nirio/nirio_resource_manager.cpp
new file mode 100644
index 000000000..85e789087
--- /dev/null
+++ b/host/lib/transport/nirio/nirio_resource_manager.cpp
@@ -0,0 +1,120 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#include <uhd/transport/nirio/nirio_resource_manager.h>
+
+#ifdef __clang__
+    #pragma GCC diagnostic push ignored "-Wmissing-field-initializers"
+#elif defined(__GNUC__)
+    #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+namespace uhd { namespace niusrprio
+{
+
+nirio_resource_manager::nirio_resource_manager(
+    niriok_proxy& proxy) : _kernel_proxy(proxy), _fifo_info_map(), _reg_info_map()
+{
+}
+
+nirio_resource_manager::~nirio_resource_manager()
+{
+    finalize();
+}
+
+nirio_status nirio_resource_manager::initialize(
+    const nirio_register_info_vtr& reg_info_vtr,
+    const nirio_fifo_info_vtr& fifo_info_vtr)
+{
+    nirio_status status = 0;
+    for (nirio_fifo_info_vtr::const_iterator it = fifo_info_vtr.begin(); it != fifo_info_vtr.end(); it++) {
+        const nirio_fifo_info_t& fifo_info = *it;
+        status = _add_fifo_resource(fifo_info);
+        if (nirio_status_fatal(status)) return status;
+
+        _fifo_info_map.insert(fifo_info_map_t::value_type(fifo_info.name, fifo_info));
+    }
+    for (nirio_register_info_vtr::const_iterator it = reg_info_vtr.begin(); it != reg_info_vtr.end(); it++) {
+        const nirio_register_info_t& reg_info = *it;
+
+        _reg_info_map.insert(register_info_map_t::value_type(reg_info.name, reg_info));
+    }
+    return _set_driver_config();
+}
+
+void nirio_resource_manager::finalize()
+{
+    _fifo_info_map.clear();
+}
+
+nirio_status nirio_resource_manager::get_register_offset(
+    const char* register_name,
+    uint32_t& offset)
+{
+    register_info_map_t::const_iterator it = _reg_info_map.find(fifo_info_map_t::key_type(register_name));
+    if (it == _reg_info_map.end()) return NiRio_Status_InvalidParameter;
+
+    offset = (*it).second.offset;
+
+    return NiRio_Status_Success;
+}
+
+
+nirio_status nirio_resource_manager::_add_fifo_resource(
+    const nirio_fifo_info_t& fifo_info)
+{
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+    in.function    = nirio_driver_iface::NIRIO_FUNC::ADD_RESOURCE;
+    in.subfunction = (fifo_info.direction == OUTPUT_FIFO) ?
+            nirio_driver_iface::NIRIO_RESOURCE::OUTPUT_FIFO :
+            nirio_driver_iface::NIRIO_RESOURCE::INPUT_FIFO;
+
+    in.params.add.fifoWithDataType.channel        = fifo_info.channel;
+    in.params.add.fifoWithDataType.baseAddress    = fifo_info.base_addr;
+    in.params.add.fifoWithDataType.depthInSamples = fifo_info.depth;
+    in.params.add.fifoWithDataType.scalarType     = fifo_info.scalar_type;
+    in.params.add.fifoWithDataType.bitWidth       = fifo_info.width;
+    in.params.add.fifoWithDataType.version        = fifo_info.version;
+
+    return _kernel_proxy.sync_operation(&in, sizeof(in), &out, sizeof(out));
+}
+
+nirio_status nirio_resource_manager::_set_driver_config()
+{
+    nirio_driver_iface::nirio_syncop_in_params_t in = {};
+    nirio_driver_iface::nirio_syncop_out_params_t out = {};
+    in.function    = nirio_driver_iface::NIRIO_FUNC::SET_DRIVER_CONFIG;
+    in.subfunction = 0;
+
+    return _kernel_proxy.sync_operation(&in, sizeof(in), &out, sizeof(out));
+}
+
+nirio_fifo_info_t* nirio_resource_manager::_lookup_fifo_info(const char* fifo_name) {
+    fifo_info_map_t::iterator it = _fifo_info_map.find(fifo_info_map_t::key_type(fifo_name));
+    if (it == _fifo_info_map.end()) return NULL;
+
+    return &((*it).second);
+}
+
+}}
+
+#ifdef __GNUC__
+    #pragma GCC diagnostic pop
+#endif
diff --git a/host/lib/transport/nirio/niriok_proxy.cpp b/host/lib/transport/nirio/niriok_proxy.cpp
new file mode 100644
index 000000000..031623c9a
--- /dev/null
+++ b/host/lib/transport/nirio/niriok_proxy.cpp
@@ -0,0 +1,300 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#include <uhd/transport/nirio/niriok_proxy.h>
+#include <cstring>
+
+#define NI_VENDOR_NUM   0x1093
+
+#define VERSION_BUILD_SHIFT     0
+#define VERSION_PHASE_SHIFT     14
+#define VERSION_MAINT_SHIFT     16
+#define VERSION_UPGRD_SHIFT     20
+#define VERSION_MAJOR_SHIFT     24
+#define VERSION_BUILD_MASK      0x00003FFF
+#define VERSION_PHASE_MASK      0x0000C000
+#define VERSION_MAINT_MASK      0x000F0000
+#define VERSION_UPGRD_MASK      0x00F00000
+#define VERSION_MAJOR_MASK      0xFF000000
+
+#define GET_FIFO_MEMORY_TYPE(fifo_inst) (static_cast<uint16_t>(0x0100 | static_cast<uint16_t>(fifo_inst)))
+
+#ifdef __clang__
+    #pragma GCC diagnostic push ignored "-Wmissing-field-initializers"
+#elif defined(__GNUC__)
+    #pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+#endif
+
+namespace uhd { namespace niusrprio
+{
+    //-------------------------------------------------------
+    // niriok_proxy
+    //-------------------------------------------------------
+    niriok_proxy::niriok_proxy(): _device_handle(nirio_driver_iface::INVALID_RIO_HANDLE)
+    {
+    }
+
+    niriok_proxy::~niriok_proxy()
+    {
+        close();
+    }
+
+    nirio_status niriok_proxy::open(const std::string& interface_path)
+    {
+        if (interface_path.empty()) return NiRio_Status_ResourceNotFound;
+
+        //close if already open.
+        close();
+
+        nirio_status status = NiRio_Status_Success;
+        nirio_status_chain(nirio_driver_iface::rio_open(
+            interface_path, _device_handle), status);
+        if (nirio_status_not_fatal(status)) {
+            nirio_status_chain(nirio_driver_iface::rio_ioctl(_device_handle,
+                                        nirio_driver_iface::NIRIO_IOCTL_POST_OPEN,
+                                        NULL, 0, NULL, 0), status);
+            nirio_driver_iface::nirio_ioctl_packet_t out(&_interface_num, sizeof(_interface_num), 0);
+            nirio_status_chain(nirio_driver_iface::rio_ioctl(_device_handle,
+                                        nirio_driver_iface::NIRIO_IOCTL_GET_IFACE_NUM,
+                                        NULL, 0,
+                                        &out, sizeof(out)), status);
+
+            if (nirio_status_fatal(status)) close();
+        }
+        return status;
+    }
+
+    void niriok_proxy::close(void)
+    {
+       if(nirio_driver_iface::rio_isopen(_device_handle))
+       {
+            nirio_driver_iface::rio_ioctl(
+                _device_handle, nirio_driver_iface::NIRIO_IOCTL_PRE_CLOSE, NULL, 0, NULL, 0);
+            nirio_driver_iface::rio_close(_device_handle);
+       }
+    }
+
+    nirio_status niriok_proxy::reset()
+    {
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+        in.function = nirio_driver_iface::NIRIO_FUNC::RESET;
+
+        return sync_operation(&in, sizeof(in), &out, sizeof(out));
+    }
+
+    nirio_status niriok_proxy::get_cached_session(
+        uint32_t& session)
+    {
+        nirio_driver_iface::nirio_ioctl_packet_t out(&session, sizeof(session), 0);
+        return nirio_driver_iface::rio_ioctl(_device_handle,
+                                    nirio_driver_iface::NIRIO_IOCTL_GET_SESSION,
+                                    NULL, 0,
+                                    &out, sizeof(out));
+    }
+
+    nirio_status niriok_proxy::get_version(
+        nirio_version_t type,
+        uint32_t& major,
+        uint32_t& upgrade,
+        uint32_t& maintenance,
+        char& phase,
+        uint32_t& build)
+    {
+        nirio_device_attr_32_t version_attr = (type==CURRENT)?CURRENT_VERSION:OLDEST_COMPATIBLE_VERSION;
+        uint32_t raw_version = 0;
+        nirio_status status = get_attribute(version_attr, raw_version);
+
+        major       = (raw_version & VERSION_MAJOR_MASK) >> VERSION_MAJOR_SHIFT;
+        upgrade     = (raw_version & VERSION_UPGRD_MASK) >> VERSION_UPGRD_SHIFT;
+        maintenance = (raw_version & VERSION_MAINT_MASK) >> VERSION_MAINT_SHIFT;
+        build       = (raw_version & VERSION_BUILD_MASK) >> VERSION_BUILD_SHIFT;
+
+        uint32_t phase_num = (raw_version & VERSION_PHASE_MASK) >> VERSION_PHASE_SHIFT;
+        switch (phase_num) {
+            case 0: phase = 'd'; break;
+            case 1: phase = 'a'; break;
+            case 2: phase = 'b'; break;
+            case 3: phase = 'f'; break;
+        }
+
+        return status;
+    }
+
+    nirio_status niriok_proxy::sync_operation(
+        const void *writeBuffer,
+        size_t writeBufferLength,
+        void *readBuffer,
+        size_t readBufferLength)
+    {
+        nirio_driver_iface::nirio_ioctl_packet_t out(readBuffer, readBufferLength, 0);
+        nirio_status ioctl_status = nirio_driver_iface::rio_ioctl(_device_handle,
+                                    nirio_driver_iface::NIRIO_IOCTL_SYNCOP,
+                                    writeBuffer, writeBufferLength,
+                                    &out, sizeof(out));
+        if (nirio_status_fatal(ioctl_status)) return ioctl_status;
+
+        return out.statusCode;
+    }
+
+    nirio_status niriok_proxy::get_attribute(
+        const nirio_device_attr_32_t attribute,
+        uint32_t& attrValue)
+    {
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+        in.function = nirio_driver_iface::NIRIO_FUNC::GET32;
+        in.params.attribute32.attribute = attribute;
+
+        nirio_status status = sync_operation(&in, sizeof(in), &out, sizeof(out));
+
+        attrValue = out.params.attribute32.value;
+        return status;
+    }
+
+    nirio_status niriok_proxy::get_attribute(
+        const nirio_device_attr_str_t  attribute,
+        char *buf,
+        const uint32_t bufLen,
+        uint32_t& stringLen)
+    {
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+        nirio_driver_iface::init_syncop_out_params(out, buf, bufLen);
+
+        in.function = nirio_driver_iface::NIRIO_FUNC::GET_STRING;
+        in.params.attributeStr.attribute = attribute;
+
+        nirio_status status = sync_operation(&in, sizeof(in), &out, sizeof(out));
+
+        stringLen = out.params.stringLength;
+        return status;
+    }
+
+    nirio_status niriok_proxy::set_attribute(
+        const nirio_device_attr_32_t attribute,
+        const uint32_t value)
+    {
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+       in.function = nirio_driver_iface::NIRIO_FUNC::SET32;
+       in.params.attribute32.attribute = attribute;
+       in.params.attribute32.value  = value;
+
+       return sync_operation(&in, sizeof(in), &out, sizeof(out));
+    }
+
+    nirio_status niriok_proxy::set_attribute(
+        const nirio_device_attr_str_t attribute,
+        const char* const buffer)
+    {
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::init_syncop_in_params(in, buffer, strlen(buffer) + 1);
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+        in.function = nirio_driver_iface::NIRIO_FUNC::SET_STRING;
+        in.params.attributeStr.attribute = attribute;
+
+        return sync_operation(&in, sizeof(in), &out, sizeof(out));
+    }
+
+    nirio_status niriok_proxy::peek(uint32_t offset, uint32_t& value)
+    {
+        if (offset % 4 != 0) return NiRio_Status_MisalignedAccess;
+
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+        in.function         = nirio_driver_iface::NIRIO_FUNC::IO;
+        in.subfunction      = nirio_driver_iface::NIRIO_IO::PEEK32;
+        in.params.io.offset = offset;
+
+        nirio_status status = sync_operation(&in, sizeof(in), &out, sizeof(out));
+        value = out.params.io.value.value32;
+        return status;
+    }
+
+    nirio_status niriok_proxy::peek(uint32_t offset, uint64_t& value)
+    {
+        if (offset % 8 != 0) return NiRio_Status_MisalignedAccess;
+
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+        in.function         = nirio_driver_iface::NIRIO_FUNC::IO;
+        in.subfunction      = nirio_driver_iface::NIRIO_IO::PEEK64;
+        in.params.io.offset = offset;
+
+        nirio_status status = sync_operation(&in, sizeof(in), &out, sizeof(out));
+        value = out.params.io.value.value64;
+        return status;
+    }
+
+    nirio_status niriok_proxy::poke(uint32_t offset, const uint32_t& value)
+    {
+        if (offset % 4 != 0) return NiRio_Status_MisalignedAccess;
+
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+        in.function                 = nirio_driver_iface::NIRIO_FUNC::IO;
+        in.subfunction              = nirio_driver_iface::NIRIO_IO::POKE32;
+        in.params.io.offset         = offset;
+        in.params.io.value.value32  = value;
+
+        return sync_operation(&in, sizeof(in), &out, sizeof(out));
+    }
+
+    nirio_status niriok_proxy::poke(uint32_t offset, const uint64_t& value)
+    {
+        if (offset % 8 != 0) return NiRio_Status_MisalignedAccess;
+
+        nirio_driver_iface::nirio_syncop_in_params_t in = {};
+        nirio_driver_iface::nirio_syncop_out_params_t out = {};
+
+        in.function                 = nirio_driver_iface::NIRIO_FUNC::IO;
+        in.subfunction              = nirio_driver_iface::NIRIO_IO::POKE64;
+        in.params.io.offset         = offset;
+        in.params.io.value.value64  = value;
+
+        return sync_operation(&in, sizeof(in), &out, sizeof(out));
+    }
+
+    nirio_status niriok_proxy::map_fifo_memory(
+        uint32_t fifo_instance,
+        size_t size,
+        nirio_driver_iface::rio_mmap_t& map)
+    {
+        return nirio_driver_iface::rio_mmap(_device_handle,
+                GET_FIFO_MEMORY_TYPE(fifo_instance),
+                size, true, map);
+    }
+
+    nirio_status niriok_proxy::unmap_fifo_memory(
+        nirio_driver_iface::rio_mmap_t& map)
+    {
+        return nirio_driver_iface::rio_munmap(map);
+    }
+}}
+
+#ifdef __GNUC__
+    #pragma GCC diagnostic pop
+#endif
diff --git a/host/lib/transport/nirio/niusrprio_session.cpp b/host/lib/transport/nirio/niusrprio_session.cpp
new file mode 100644
index 000000000..a07bc4fdf
--- /dev/null
+++ b/host/lib/transport/nirio/niusrprio_session.cpp
@@ -0,0 +1,199 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#include <uhd/transport/nirio/niusrprio_session.h>
+#include <uhd/transport/nirio/nirio_fifo.h>
+#include <uhd/transport/nirio/status.h>
+#include <boost/format.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/lexical_cast.hpp>
+#include <stdio.h>
+#include <fstream>
+//@TODO: Move the register defs required by the class to a common location
+#include "../../usrp/x300/x300_regs.hpp"
+
+namespace uhd { namespace niusrprio {
+
+niusrprio_session::niusrprio_session(const std::string& resource_name, const std::string& rpc_port_name) :
+    _resource_name(resource_name),
+    _session_open(false),
+    _resource_manager(_riok_proxy),
+    _rpc_client("localhost", rpc_port_name)
+{
+}
+
+niusrprio_session::~niusrprio_session()
+{
+    close();
+}
+
+nirio_status niusrprio_session::enumerate(const std::string& rpc_port_name, device_info_vtr& device_info_vtr)
+{
+    usrprio_rpc::usrprio_rpc_client temp_rpc_client("localhost", rpc_port_name);
+    nirio_status status = temp_rpc_client.get_ctor_status();
+    nirio_status_chain(temp_rpc_client.niusrprio_enumerate(device_info_vtr), status);
+    return status;
+}
+
+nirio_status niusrprio_session::open(
+    nifpga_lvbitx::sptr lvbitx,
+    bool force_download)
+{
+    boost::unique_lock<boost::recursive_mutex> lock(_session_mutex);
+
+    _lvbitx = lvbitx;
+
+    nirio_status status = NiRio_Status_Success;
+    std::string bitfile_path(_lvbitx->get_bitfile_path());
+    std::string signature(_lvbitx->get_signature());
+
+    //Make sure that the RPC client connected to the server properly
+    nirio_status_chain(_rpc_client.get_ctor_status(), status);
+    //Get a handle to the kernel driver
+    nirio_status_chain(_rpc_client.niusrprio_get_interface_path(_resource_name, _interface_path), status);
+    nirio_status_chain(_riok_proxy.open(_interface_path), status);
+
+    if (nirio_status_not_fatal(status)) {
+        //Bitfile build for a particular LVFPGA interface will have the same signature
+        //because the API of the bitfile does not change. Two files with the same signature
+        //can however have different bitstreams because of non-LVFPGA code differences.
+        //That is why we need another identifier to qualify the signature. The BIN
+        //checksum is a good candidate.
+        std::string lvbitx_checksum(_lvbitx->get_bitstream_checksum());
+        boost::uint16_t download_fpga = (force_download || (_read_bitstream_checksum() != lvbitx_checksum)) ? 1 : 0;
+
+        nirio_status_chain(_rpc_client.niusrprio_open_session(
+            _resource_name, bitfile_path, signature, download_fpga), status);
+        _session_open = nirio_status_not_fatal(status);
+
+        if (nirio_status_not_fatal(status)) {
+            nirio_register_info_vtr reg_vtr;
+            nirio_fifo_info_vtr fifo_vtr;
+            _lvbitx->init_register_info(reg_vtr);
+            _lvbitx->init_fifo_info(fifo_vtr);
+            _resource_manager.initialize(reg_vtr, fifo_vtr);
+
+            nirio_status_chain(_verify_signature(), status);
+            nirio_status_chain(_write_bitstream_checksum(lvbitx_checksum), status);
+        }
+    }
+
+    return status;
+}
+
+void niusrprio_session::close(bool skip_reset)
+{
+    boost::unique_lock<boost::recursive_mutex> lock(_session_mutex);
+
+    if (_session_open) {
+        nirio_status status = NiRio_Status_Success;
+        if (!skip_reset) reset();
+        nirio_status_chain(_rpc_client.niusrprio_close_session(_resource_name), status);
+        _session_open = false;
+    }
+}
+
+nirio_status niusrprio_session::reset()
+{
+    boost::unique_lock<boost::recursive_mutex> lock(_session_mutex);
+    return _rpc_client.niusrprio_reset_device(_resource_name);
+}
+
+nirio_status niusrprio_session::download_bitstream_to_flash(const std::string& bitstream_path)
+{
+    boost::unique_lock<boost::recursive_mutex> lock(_session_mutex);
+    return _rpc_client.niusrprio_download_fpga_to_flash(_resource_name, bitstream_path);
+}
+
+niriok_proxy::sptr niusrprio_session::create_kernel_proxy(
+    const std::string& resource_name,
+    const std::string& rpc_port_name)
+{
+    usrprio_rpc::usrprio_rpc_client temp_rpc_client("localhost", rpc_port_name);
+    nirio_status status = temp_rpc_client.get_ctor_status();
+
+    std::string interface_path;
+    nirio_status_chain(temp_rpc_client.niusrprio_get_interface_path(resource_name, interface_path), status);
+
+    niriok_proxy::sptr proxy;
+    if (nirio_status_not_fatal(status)) {
+        proxy.reset(new niriok_proxy());
+        if (proxy) nirio_status_chain(proxy->open(interface_path), status);
+    }
+
+    return proxy;
+}
+
+nirio_status niusrprio_session::_verify_signature()
+{
+    //Validate the signature using the kernel proxy
+    nirio_status status = NiRio_Status_Success;
+    boost::uint32_t sig_offset = 0;
+    nirio_status_chain(_riok_proxy.get_attribute(DEFAULT_FPGA_SIGNATURE_OFFSET, sig_offset), status);
+    niriok_scoped_addr_space(_riok_proxy, FPGA, status);
+    std::string signature;
+    for (boost::uint32_t i = 0; i < 8; i++) {
+        boost::uint32_t quarter_sig;
+        nirio_status_chain(_riok_proxy.peek(sig_offset, quarter_sig), status);
+        signature += boost::str(boost::format("%08x") % quarter_sig);
+    }
+
+    std::string expected_signature(_lvbitx->get_signature());
+    boost::to_upper(signature);
+    boost::to_upper(expected_signature);
+    if (signature.find(expected_signature) == std::string::npos) {
+        nirio_status_chain(NiRio_Status_SignatureMismatch, status);
+    }
+
+    return status;
+}
+
+std::string niusrprio_session::_read_bitstream_checksum()
+{
+    nirio_status status = NiRio_Status_Success;
+    niriok_scoped_addr_space(_riok_proxy, BUS_INTERFACE, status);
+    std::string usr_signature;
+    for (boost::uint32_t i = 0; i < FPGA_USR_SIG_REG_SIZE; i+=4) {
+        boost::uint32_t quarter_sig;
+        nirio_status_chain(_riok_proxy.peek(FPGA_USR_SIG_REG_BASE + i, quarter_sig), status);
+        usr_signature += boost::str(boost::format("%08x") % quarter_sig);
+    }
+    boost::to_upper(usr_signature);
+
+    return usr_signature;
+}
+
+nirio_status niusrprio_session::_write_bitstream_checksum(const std::string& checksum)
+{
+    nirio_status status = NiRio_Status_Success;
+    niriok_scoped_addr_space(_riok_proxy, BUS_INTERFACE, status);
+    for (boost::uint32_t i = 0; i < FPGA_USR_SIG_REG_SIZE; i+=4) {
+        boost::uint32_t quarter_sig;
+        try {
+            std::stringstream ss;
+            ss << std::hex << checksum.substr(i*2,8);
+            ss >> quarter_sig;
+        } catch (std::exception&) {
+            quarter_sig = 0;
+        }
+        nirio_status_chain(_riok_proxy.poke(FPGA_USR_SIG_REG_BASE + i, quarter_sig), status);
+    }
+    return status;
+}
+
+}}
diff --git a/host/lib/transport/nirio/rpc/CMakeLists.txt b/host/lib/transport/nirio/rpc/CMakeLists.txt
new file mode 100644
index 000000000..02c16d2ff
--- /dev/null
+++ b/host/lib/transport/nirio/rpc/CMakeLists.txt
@@ -0,0 +1,29 @@
+#
+# Copyright 2013 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+# This file included, use CMake directory variables
+########################################################################
+
+########################################################################
+# Append to the list of sources for lib uhd
+########################################################################
+
+LIBUHD_APPEND_SOURCES(
+    ${CMAKE_CURRENT_SOURCE_DIR}/rpc_client.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/usrprio_rpc_client.cpp
+)
diff --git a/host/lib/transport/nirio/rpc/rpc_client.cpp b/host/lib/transport/nirio/rpc/rpc_client.cpp
new file mode 100644
index 000000000..a5f8cf412
--- /dev/null
+++ b/host/lib/transport/nirio/rpc/rpc_client.cpp
@@ -0,0 +1,201 @@
+///
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/transport/nirio/rpc/rpc_client.hpp>
+#include <boost/bind.hpp>
+#include <boost/format.hpp>
+
+#define CHAIN_BLOCKING_XFER(func, exp, status) \
+    if (status) { \
+        status = (static_cast<size_t>((func)) == exp); \
+    } else { \
+        UHD_LOG << "rpc_client operation skipped: " #func "\n"; \
+    } \
+
+namespace uhd { namespace usrprio_rpc {
+
+using boost::asio::ip::tcp;
+
+rpc_client::rpc_client (
+    const std::string& server,
+    const std::string& port,
+    boost::uint32_t process_id,
+    boost::uint32_t host_id
+) : _socket(_io_service)
+{
+    //Fill in handshake info
+    _hshake_args_client.version = CURRENT_VERSION;
+    _hshake_args_client.oldest_comp_version = OLDEST_COMPATIBLE_VERSION;
+    _hshake_args_client.client_id = build_client_id(host_id, process_id);
+    _hshake_args_client.boost_archive_version = boost_serialization_archive_utils::get_version();
+
+    try {
+        //Synchronous resolve + connect
+        tcp::resolver resolver(_io_service);
+        tcp::resolver::query query(tcp::v4(), server, port);
+        tcp::resolver::iterator iterator = resolver.resolve(query);
+        boost::asio::connect(_socket, iterator);
+        UHD_LOG << "rpc_client connected to server." << std::endl;
+
+        try {
+            //Perform handshake
+            bool status = true;
+            CHAIN_BLOCKING_XFER(
+                boost::asio::write(_socket, boost::asio::buffer(&_hshake_args_client, sizeof(_hshake_args_client))),
+                sizeof(_hshake_args_client), status);
+            CHAIN_BLOCKING_XFER(
+                boost::asio::read(_socket, boost::asio::buffer(&_hshake_args_server, sizeof(_hshake_args_server))),
+                sizeof(_hshake_args_server), status);
+
+            _request.header.client_id = _hshake_args_server.client_id;
+
+            if (_hshake_args_server.version >= _hshake_args_client.oldest_comp_version &&
+                _hshake_args_client.version >= _hshake_args_server.oldest_comp_version &&
+                status)
+            {
+                UHD_LOG << "rpc_client bound to server." << std::endl;
+                _wait_for_next_response_header();
+
+                //Spawn a thread for the io_service callback handler. This thread will run until rpc_client is destroyed.
+                _io_service_thread.reset(new boost::thread(boost::bind(&boost::asio::io_service::run, &_io_service)));
+            } else {
+                UHD_LOG << "rpc_client handshake failed." << std::endl;
+                _exec_err.assign(boost::asio::error::connection_refused, boost::system::system_category());
+            }
+            UHD_LOG << boost::format("rpc_client archive = %d, rpc_server archive = %d\n.") %
+                _hshake_args_client.boost_archive_version %
+                _hshake_args_server.boost_archive_version;
+        } catch (boost::exception&) {
+            UHD_LOG << "rpc_client handshake aborted." << std::endl;
+            _exec_err.assign(boost::asio::error::connection_refused, boost::system::system_category());
+        }
+    } catch (boost::exception&) {
+        UHD_LOG << "rpc_client connection request cancelled/aborted." << std::endl;
+        _exec_err.assign(boost::asio::error::connection_aborted, boost::system::system_category());
+    }
+}
+
+rpc_client::~rpc_client () {
+    _stop_io_service();
+}
+
+const boost::system::error_code& rpc_client::call(
+    func_id_t func_id,
+    const func_args_writer_t& in_args,
+    func_args_reader_t &out_args,
+    boost::posix_time::milliseconds timeout
+)
+{
+    boost::mutex::scoped_lock lock(_mutex);
+
+    if (_io_service_thread.get()) {
+        _request.header.func_id = func_id;
+        in_args.store(_request.data);
+        _request.header.func_args_size = _request.data.size();
+
+        _exec_err.clear();
+
+        //Send function call header and args
+        bool status = true;
+        try {
+            CHAIN_BLOCKING_XFER(
+                boost::asio::write(_socket, boost::asio::buffer(&_request.header, sizeof(_request.header))),
+                sizeof(_request.header), status);
+            CHAIN_BLOCKING_XFER(
+                boost::asio::write(_socket, boost::asio::buffer(&(*_request.data.begin()), _request.data.size())),
+                _request.data.size(), status);
+        } catch (boost::exception&) {
+            status = false;
+        }
+
+        //Wait for response using condition variable
+        if (status) {
+            if (!_exec_gate.timed_wait(lock, timeout)) {
+                UHD_LOG << "rpc_client function timed out." << std::endl;
+                _exec_err.assign(boost::asio::error::timed_out, boost::system::system_category());
+            }
+        } else {
+            UHD_LOG << "rpc_client connection dropped." << std::endl;
+            _exec_err.assign(boost::asio::error::connection_aborted, boost::system::system_category());
+            _stop_io_service();
+        }
+
+        //Verify that we are talking to the correct endpoint
+        if ((_request.header.client_id != _response.header.client_id) && !_exec_err) {
+            UHD_LOG << "rpc_client confused about who its talking to." << std::endl;
+            _exec_err.assign(boost::asio::error::operation_aborted, boost::system::system_category());
+        }
+
+        if (!_exec_err) out_args.load(_response.data);
+    }
+
+    return _exec_err;
+}
+
+void rpc_client::_handle_response_hdr(const boost::system::error_code& err, size_t transferred, size_t expected)
+{
+    boost::mutex::scoped_lock lock(_mutex);
+    _exec_err = err;
+    if (!_exec_err && (transferred == expected)) {
+        //Response header received. Verify that it is expected
+        if (func_args_header_t::match_function(_request.header, _response.header)) {
+            _response.data.resize(_response.header.func_args_size);
+
+            //Wait for response data
+            boost::asio::async_read(_socket,
+                boost::asio::buffer(&(*_response.data.begin()), _response.data.size()),
+                boost::bind(&rpc_client::_handle_response_data, this,
+                    boost::asio::placeholders::error,
+                    boost::asio::placeholders::bytes_transferred,
+                    _response.data.size()));
+        } else {
+            //Unexpected response. Ignore it.
+            UHD_LOG << "rpc_client received garbage responses." << std::endl;
+            _exec_err.assign(boost::asio::error::operation_aborted, boost::system::system_category());
+
+            _wait_for_next_response_header();
+        }
+    }
+
+    if (_exec_err) _exec_gate.notify_all();
+}
+
+void rpc_client::_handle_response_data(const boost::system::error_code& err, size_t transferred, size_t expected)
+{
+    boost::mutex::scoped_lock lock(_mutex);
+    _exec_err = err;
+    if (transferred != expected) {
+        _exec_err.assign(boost::asio::error::operation_aborted, boost::system::system_category());
+    }
+
+    _exec_gate.notify_all();
+
+    _wait_for_next_response_header();
+}
+
+void rpc_client::_wait_for_next_response_header() {
+    //_mutex must be locked when this call is made
+    boost::asio::async_read(
+        _socket,
+        boost::asio::buffer(&_response.header, sizeof(_response.header)),
+        boost::bind(&rpc_client::_handle_response_hdr, this,
+            boost::asio::placeholders::error,
+            boost::asio::placeholders::bytes_transferred,
+            sizeof(_response.header)));
+}
+
+}}
diff --git a/host/lib/transport/nirio/rpc/usrprio_rpc_client.cpp b/host/lib/transport/nirio/rpc/usrprio_rpc_client.cpp
new file mode 100644
index 000000000..1a1f1cd21
--- /dev/null
+++ b/host/lib/transport/nirio/rpc/usrprio_rpc_client.cpp
@@ -0,0 +1,229 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/transport/nirio/rpc/usrprio_rpc_client.hpp>
+#include <uhd/utils/platform.hpp>
+
+namespace uhd { namespace usrprio_rpc {
+
+usrprio_rpc_client::usrprio_rpc_client(
+    std::string server,
+    std::string port
+) : _rpc_client(server, port, uhd::get_process_id(), uhd::get_host_id()),
+    _timeout(boost::posix_time::milliseconds(DEFAULT_TIMEOUT_IN_MS))
+{
+   _ctor_status = _rpc_client.status() ? NiRio_Status_RpcConnectionError : NiRio_Status_Success;
+}
+
+usrprio_rpc_client::~usrprio_rpc_client()
+{
+}
+
+nirio_status usrprio_rpc_client::niusrprio_enumerate(NIUSRPRIO_ENUMERATE_ARGS)
+/*
+#define NIUSRPRIO_ENUMERATE_ARGS         \
+    usrprio_device_info_vtr& device_info_vtr
+*/
+{
+    usrprio_rpc::func_args_writer_t in_args;
+    usrprio_rpc::func_args_reader_t out_args;
+    nirio_status status = NiRio_Status_Success;
+    boost::uint32_t vtr_size = 0;
+
+    status = _boost_error_to_nirio_status(
+        _rpc_client.call(NIUSRPRIO_ENUMERATE, in_args, out_args, _timeout));
+
+    if (nirio_status_not_fatal(status)) {
+        out_args >> status;
+        out_args >> vtr_size;
+    }
+    if (nirio_status_not_fatal(status) && vtr_size > 0) {
+        device_info_vtr.resize(vtr_size);
+        for (size_t i = 0; i < (size_t)vtr_size; i++) {
+            usrprio_device_info info;
+            out_args >> info;
+            device_info_vtr[i] = info;
+        }
+    }
+    return status;
+}
+
+nirio_status usrprio_rpc_client::niusrprio_open_session(NIUSRPRIO_OPEN_SESSION_ARGS)
+/*
+#define NIUSRPRIO_OPEN_SESSION_ARGS     \
+    const std::string& resource,        \
+    const std::string& path,            \
+    const std::string& signature,       \
+    const boost::uint16_t& download_fpga
+*/
+{
+    usrprio_rpc::func_args_writer_t in_args;
+    usrprio_rpc::func_args_reader_t out_args;
+    nirio_status status = NiRio_Status_Success;
+
+    in_args << resource;
+    in_args << path;
+    in_args << signature;
+    in_args << download_fpga;
+
+    //Open needs a longer timeout because the FPGA download can take upto 6 secs and the NiFpga libload can take 4.
+    static const boost::uint32_t OPEN_TIMEOUT = 15000;
+    status = _boost_error_to_nirio_status(
+        _rpc_client.call(NIUSRPRIO_OPEN_SESSION, in_args, out_args, boost::posix_time::milliseconds(OPEN_TIMEOUT)));
+
+    if (nirio_status_not_fatal(status)) {
+        out_args >> status;
+    }
+
+    return status;
+}
+
+nirio_status usrprio_rpc_client::niusrprio_close_session(NIUSRPRIO_CLOSE_SESSION_ARGS)
+/*
+#define NIUSRPRIO_CLOSE_SESSION_ARGS    \
+    const std::string& resource
+*/
+{
+    usrprio_rpc::func_args_writer_t in_args;
+    usrprio_rpc::func_args_reader_t out_args;
+    nirio_status status = NiRio_Status_Success;
+
+    in_args << resource;
+
+    status = _boost_error_to_nirio_status(
+        _rpc_client.call(NIUSRPRIO_CLOSE_SESSION, in_args, out_args, _timeout));
+
+    if (nirio_status_not_fatal(status)) {
+        out_args >> status;
+    }
+
+    return status;
+}
+
+nirio_status usrprio_rpc_client::niusrprio_reset_device(NIUSRPRIO_RESET_SESSION_ARGS)
+/*
+#define NIUSRPRIO_RESET_SESSION_ARGS    \
+    const std::string& resource
+*/
+{
+    usrprio_rpc::func_args_writer_t in_args;
+    usrprio_rpc::func_args_reader_t out_args;
+    nirio_status status = NiRio_Status_Success;
+
+    in_args << resource;
+
+    status = _boost_error_to_nirio_status(
+        _rpc_client.call(NIUSRPRIO_RESET_SESSION, in_args, out_args, _timeout));
+
+    if (nirio_status_not_fatal(status)) {
+        out_args >> status;
+    }
+
+    return status;
+}
+
+nirio_status usrprio_rpc_client::niusrprio_get_interface_path(NIUSRPRIO_GET_INTERFACE_PATH_ARGS)
+/*
+#define NIUSRPRIO_GET_INTERFACE_PATH_ARGS   \
+    const std::string& resource,            \
+    std::string& interface_path
+*/
+{
+    usrprio_rpc::func_args_writer_t in_args;
+    usrprio_rpc::func_args_reader_t out_args;
+    nirio_status status = NiRio_Status_Success;
+
+    in_args << resource;
+
+    status = _boost_error_to_nirio_status(
+        _rpc_client.call(NIUSRPRIO_GET_INTERFACE_PATH, in_args, out_args, _timeout));
+
+    if (nirio_status_not_fatal(status)) {
+        out_args >> status;
+        out_args >> interface_path;
+    }
+
+    return status;
+}
+
+nirio_status usrprio_rpc_client::niusrprio_download_fpga_to_flash(NIUSRPRIO_DOWNLOAD_FPGA_TO_FLASH_ARGS)
+/*
+#define NIUSRPRIO_DOWNLOAD_FPGA_TO_FLASH_ARGS   \
+    const boost::uint32_t& interface_num,       \
+    const std::string& bitstream_path
+*/
+{
+    usrprio_rpc::func_args_writer_t in_args;
+    usrprio_rpc::func_args_reader_t out_args;
+    nirio_status status = NiRio_Status_Success;
+
+    in_args << resource;
+    in_args << bitstream_path;
+
+    static const boost::uint32_t DOWNLOAD_FPGA_TIMEOUT = 1200000;
+    status = _boost_error_to_nirio_status(
+        _rpc_client.call(NIUSRPRIO_DOWNLOAD_FPGA_TO_FLASH, in_args, out_args,
+            boost::posix_time::milliseconds(DOWNLOAD_FPGA_TIMEOUT)));
+
+    if (nirio_status_not_fatal(status)) {
+        out_args >> status;
+    }
+
+    return status;
+}
+
+nirio_status usrprio_rpc_client::niusrprio_download_bitstream_to_fpga(NIUSRPRIO_DOWNLOAD_BITSTREAM_TO_FPGA_ARGS)
+/*
+#define NIUSRPRIO_DOWNLOAD_BITSTREAM_TO_FPGA_ARGS    \
+    const std::string& resource
+*/
+{
+    usrprio_rpc::func_args_writer_t in_args;
+    usrprio_rpc::func_args_reader_t out_args;
+    nirio_status status = NiRio_Status_Success;
+
+    in_args << resource;
+
+    status = _boost_error_to_nirio_status(
+        _rpc_client.call(NIUSRPRIO_DOWNLOAD_BITSTREAM_TO_FPGA, in_args, out_args, _timeout));
+
+    if (nirio_status_not_fatal(status)) {
+        out_args >> status;
+    }
+
+    return status;
+}
+
+nirio_status usrprio_rpc_client::_boost_error_to_nirio_status(const boost::system::error_code& err) {
+    if (err) {
+        switch (err.value()) {
+            case boost::asio::error::connection_aborted:
+            case boost::asio::error::connection_refused:
+            case boost::asio::error::eof:
+                return NiRio_Status_RpcSessionError;
+            case boost::asio::error::timed_out:
+            case boost::asio::error::operation_aborted:
+                return NiRio_Status_RpcOperationError;
+            default:
+                return NiRio_Status_SoftwareFault;
+        }
+    } else {
+        return NiRio_Status_Success;
+    }
+}
+
+}}
diff --git a/host/lib/transport/nirio/status.cpp b/host/lib/transport/nirio/status.cpp
new file mode 100644
index 000000000..f3f8d4cd1
--- /dev/null
+++ b/host/lib/transport/nirio/status.cpp
@@ -0,0 +1,55 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+
+#include <uhd/transport/nirio/status.h>
+#include <boost/format.hpp>
+
+namespace uhd { namespace niusrprio {
+
+#define NIRIO_ERR_INFO(CONST_NAME, ERR_CODE, ERR_MSG) \
+    nirio_err_info(ERR_CODE, ERR_MSG),
+
+const nirio_err_info nirio_err_info::NIRIO_ERROR_TABLE[] = {
+    #include "../../../include/uhd/transport/nirio/nirio_err_template.h"
+};
+
+#undef NIRIO_ERR_INFO
+
+const size_t nirio_err_info::NIRIO_ERROR_TABLE_SIZE = sizeof(NIRIO_ERROR_TABLE)/sizeof(*NIRIO_ERROR_TABLE);
+
+const std::string lookup_err_msg(nirio_status code) {
+    std::string error_msg = (boost::format("Unknown error. (Error code %d)") % code).str();
+    for (size_t i = 0; i < nirio_err_info::NIRIO_ERROR_TABLE_SIZE; i++) {
+        if (nirio_err_info::NIRIO_ERROR_TABLE[i].code == code) {
+            error_msg = (boost::format("%s (Error code %d)") % nirio_err_info::NIRIO_ERROR_TABLE[i].msg % code).str();
+            break;
+        }
+    }
+    return error_msg;
+}
+
+void nirio_status_to_exception(const nirio_status& status, const std::string& message) {
+    if (nirio_status_fatal(status)) {
+        throw uhd::runtime_error((boost::format("%s %s") % message % lookup_err_msg(status)).str());
+    }
+}
+
+}}
+
+
+
diff --git a/host/lib/transport/nirio_zero_copy.cpp b/host/lib/transport/nirio_zero_copy.cpp
new file mode 100644
index 000000000..7b1e32fe0
--- /dev/null
+++ b/host/lib/transport/nirio_zero_copy.cpp
@@ -0,0 +1,352 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/transport/nirio_zero_copy.hpp>
+#include <stdio.h>
+#include <uhd/transport/nirio/nirio_fifo.h>
+#include <uhd/transport/nirio/nirio_fifo.h>
+#include <uhd/transport/buffer_pool.hpp>
+#include <uhd/utils/msg.hpp>
+#include <uhd/utils/log.hpp>
+#include <uhd/utils/atomic.hpp>
+#include <boost/format.hpp>
+#include <boost/make_shared.hpp>
+#include <boost/thread/thread.hpp> //sleep
+#include <vector>
+#include <algorithm>    // std::max
+//@TODO: Move the register defs required by the class to a common location
+#include "../usrp/x300/x300_regs.hpp"
+
+using namespace uhd;
+using namespace uhd::transport;
+using namespace uhd::niusrprio;
+
+typedef uint64_t fifo_data_t;
+
+class nirio_zero_copy_mrb : public managed_recv_buffer
+{
+public:
+    nirio_zero_copy_mrb(nirio_fifo<fifo_data_t>& fifo, const size_t frame_size):
+        _fifo(fifo), _frame_size(frame_size) { }
+
+    void release(void)
+    {
+        _fifo.release(_frame_size / sizeof(fifo_data_t));
+    }
+
+    UHD_INLINE sptr get_new(const double timeout, size_t &index)
+    {
+        nirio_status status = 0;
+        size_t elems_acquired, elems_remaining;
+        nirio_status_chain(_fifo.acquire(
+            _typed_buffer, _frame_size / sizeof(fifo_data_t),
+            static_cast<uint32_t>(timeout*1000),
+            elems_acquired, elems_remaining), status);
+        _length = elems_acquired * sizeof(fifo_data_t);
+        _buffer = static_cast<void*>(_typed_buffer);
+
+        if (nirio_status_not_fatal(status)) {
+            index++;        //Advances the caller's buffer
+            return make(this, _buffer, _length);
+        } else if (status == NiRio_Status_CommunicationTimeout) {
+            nirio_status_to_exception(status, "NI-RIO PCIe data transfer failed.");
+            return sptr();
+        } else {
+            return sptr();  //NULL for timeout or error.
+        }
+    }
+
+private:
+    nirio_fifo<fifo_data_t>&    _fifo;
+    fifo_data_t*                _typed_buffer;
+    const size_t                _frame_size;
+    size_t                      _num_frames;
+};
+
+class nirio_zero_copy_msb : public managed_send_buffer
+{
+public:
+    nirio_zero_copy_msb(nirio_fifo<fifo_data_t>& fifo, const size_t frame_size):
+        _fifo(fifo), _frame_size(frame_size) { }
+
+    void release(void)
+    {
+        _fifo.release(_frame_size / sizeof(fifo_data_t));
+    }
+
+    UHD_INLINE sptr get_new(const double timeout, size_t &index)
+    {
+        nirio_status status = 0;
+        size_t elems_acquired, elems_remaining;
+        nirio_status_chain(_fifo.acquire(
+            _typed_buffer, _frame_size / sizeof(fifo_data_t),
+            static_cast<uint32_t>(timeout*1000),
+            elems_acquired, elems_remaining), status);
+        _length = elems_acquired * sizeof(fifo_data_t);
+        _buffer = static_cast<void*>(_typed_buffer);
+
+        if (nirio_status_not_fatal(status)) {
+            index++;        //Advances the caller's buffer
+            return make(this, _buffer, _length);
+        } else if (status == NiRio_Status_CommunicationTimeout) {
+            nirio_status_to_exception(status, "NI-RIO PCIe data transfer failed.");
+            return sptr();
+        } else {
+            return sptr();  //NULL for timeout or error.
+        }
+    }
+
+private:
+    nirio_fifo<fifo_data_t>&    _fifo;
+    fifo_data_t*                _typed_buffer;
+    const size_t                _frame_size;
+    size_t                      _num_frames;
+};
+
+class nirio_zero_copy_impl : public nirio_zero_copy {
+public:
+    typedef boost::shared_ptr<nirio_zero_copy_impl> sptr;
+
+    nirio_zero_copy_impl(
+        uhd::niusrprio::niusrprio_session::sptr fpga_session,
+        uint32_t instance,
+        const zero_copy_xport_params& xport_params
+    ):
+        _fpga_session(fpga_session),
+        _fifo_instance(instance),
+        _xport_params(xport_params),
+        _next_recv_buff_index(0), _next_send_buff_index(0)
+    {
+        UHD_LOG << boost::format("Creating PCIe transport for channel %d") % instance << std::endl;
+        UHD_LOG << boost::format("nirio zero-copy RX transport configured with frame size = %u, #frames = %u, buffer size = %u\n")
+                    % _xport_params.recv_frame_size % _xport_params.num_recv_frames %
+                    (_xport_params.recv_frame_size * _xport_params.num_recv_frames);
+        UHD_LOG << boost::format("nirio zero-copy TX transport configured with frame size = %u, #frames = %u, buffer size = %u\n")
+                    % _xport_params.send_frame_size % _xport_params.num_send_frames % (_xport_params.send_frame_size * _xport_params.num_send_frames);
+
+        _recv_buffer_pool = buffer_pool::make(_xport_params.num_recv_frames, _xport_params.recv_frame_size);
+        _send_buffer_pool = buffer_pool::make(_xport_params.num_send_frames, _xport_params.send_frame_size);
+
+        nirio_status status = 0;
+        size_t actual_depth = 0, actual_size = 0;
+
+        //Configure frame width
+        nirio_status_chain(
+            _proxy().poke(PCIE_TX_DMA_REG(DMA_FRAME_SIZE_REG, _fifo_instance),
+                          static_cast<uint32_t>(_xport_params.send_frame_size/sizeof(fifo_data_t))),
+            status);
+        nirio_status_chain(
+            _proxy().poke(PCIE_RX_DMA_REG(DMA_FRAME_SIZE_REG, _fifo_instance),
+                          static_cast<uint32_t>(_xport_params.recv_frame_size/sizeof(fifo_data_t))),
+            status);
+        //Config 32-bit word flipping and Reset DMA streams
+        nirio_status_chain(
+            _proxy().poke(PCIE_TX_DMA_REG(DMA_CTRL_STATUS_REG, _fifo_instance),
+                          DMA_CTRL_SW_BUF_U32 | DMA_CTRL_RESET),
+            status);
+        nirio_status_chain(
+            _proxy().poke(PCIE_RX_DMA_REG(DMA_CTRL_STATUS_REG, _fifo_instance),
+                          DMA_CTRL_SW_BUF_U32 | DMA_CTRL_RESET),
+            status);
+
+        //Create FIFOs
+        nirio_status_chain(
+            _fpga_session->create_rx_fifo(_fifo_instance, _recv_fifo),
+            status);
+        nirio_status_chain(
+            _fpga_session->create_tx_fifo(_fifo_instance, _send_fifo),
+            status);
+
+        if ((_recv_fifo.get() != NULL) && (_send_fifo.get() != NULL)) {
+            //Initialize FIFOs
+            nirio_status_chain(
+                _recv_fifo->initialize(
+                    (_xport_params.recv_frame_size*_xport_params.num_recv_frames)/sizeof(fifo_data_t),
+                    actual_depth, actual_size),
+                status);
+            nirio_status_chain(
+                _send_fifo->initialize(
+                    (_xport_params.send_frame_size*_xport_params.num_send_frames)/sizeof(fifo_data_t),
+                    actual_depth, actual_size),
+                status);
+
+            _proxy().get_rio_quirks().add_tx_fifo(_fifo_instance);
+
+            nirio_status_chain(_recv_fifo->start(), status);
+            nirio_status_chain(_send_fifo->start(), status);
+
+            if (nirio_status_not_fatal(status)) {
+                //Flush RX kernel buffers in case some cruft was
+                //left behind from the last run
+                _flush_rx_buff();
+
+                //allocate re-usable managed receive buffers
+                for (size_t i = 0; i < get_num_recv_frames(); i++){
+                    _mrb_pool.push_back(boost::shared_ptr<nirio_zero_copy_mrb>(new nirio_zero_copy_mrb(
+                        *_recv_fifo, get_recv_frame_size())));
+                }
+
+                //allocate re-usable managed send buffers
+                for (size_t i = 0; i < get_num_send_frames(); i++){
+                    _msb_pool.push_back(boost::shared_ptr<nirio_zero_copy_msb>(new nirio_zero_copy_msb(
+                        *_send_fifo, get_send_frame_size())));
+                }
+            }
+        } else {
+            nirio_status_chain(NiRio_Status_ResourceNotInitialized, status);
+        }
+
+        nirio_status_to_exception(status, "Could not create nirio_zero_copy transport.");
+    }
+
+    virtual ~nirio_zero_copy_impl()
+    {
+        _proxy().get_rio_quirks().remove_tx_fifo(_fifo_instance);
+
+        //Reset DMA streams (Teardown, so don't status chain)
+        _proxy().poke(PCIE_TX_DMA_REG(DMA_CTRL_STATUS_REG, _fifo_instance), DMA_CTRL_RESET);
+        _proxy().poke(PCIE_RX_DMA_REG(DMA_CTRL_STATUS_REG, _fifo_instance), DMA_CTRL_RESET);
+
+        _flush_rx_buff();
+
+        //Stop DMA channels. Stop is called in the fifo dtor but
+        //it doesn't hurt to do it here.
+        _send_fifo->stop();
+        _recv_fifo->stop();
+    }
+
+    /*******************************************************************
+     * Receive implementation:
+     * Block on the managed buffer's get call and advance the index.
+     ******************************************************************/
+    managed_recv_buffer::sptr get_recv_buff(double timeout)
+    {
+        if (_next_recv_buff_index == _xport_params.num_recv_frames) _next_recv_buff_index = 0;
+        return _mrb_pool[_next_recv_buff_index]->get_new(timeout, _next_recv_buff_index);
+    }
+
+    size_t get_num_recv_frames(void) const {return _xport_params.num_recv_frames;}
+    size_t get_recv_frame_size(void) const {return _xport_params.recv_frame_size;}
+
+    /*******************************************************************
+     * Send implementation:
+     * Block on the managed buffer's get call and advance the index.
+     ******************************************************************/
+    managed_send_buffer::sptr get_send_buff(double timeout)
+    {
+        if (_next_send_buff_index == _xport_params.num_send_frames) _next_send_buff_index = 0;
+        return _msb_pool[_next_send_buff_index]->get_new(timeout, _next_send_buff_index);
+    }
+
+    size_t get_num_send_frames(void) const {return _xport_params.num_send_frames;}
+    size_t get_send_frame_size(void) const {return _xport_params.send_frame_size;}
+
+private:
+
+    UHD_INLINE niriok_proxy& _proxy() { return _fpga_session->get_kernel_proxy(); }
+
+    UHD_INLINE void _flush_rx_buff()
+    {
+        nirio_status flush_status = 0;
+        while (nirio_status_not_fatal(flush_status)) {
+            static const size_t NUM_ELEMS_TO_FLUSH = 1;
+            static const uint32_t FLUSH_TIMEOUT_IN_MS = 0;
+
+            fifo_data_t* flush_data_ptr = NULL;
+            size_t flush_elems_acquired = 0, flush_elems_remaining = 0;
+            flush_status = _recv_fifo->acquire(
+                flush_data_ptr, NUM_ELEMS_TO_FLUSH, FLUSH_TIMEOUT_IN_MS,
+                flush_elems_acquired, flush_elems_remaining);
+            if (nirio_status_not_fatal(flush_status)) {
+                _recv_fifo->release(flush_elems_acquired);
+            }
+        }
+    }
+
+    //memory management -> buffers and fifos
+    niusrprio::niusrprio_session::sptr _fpga_session;
+    uint32_t _fifo_instance;
+    nirio_fifo<fifo_data_t>::sptr _recv_fifo, _send_fifo;
+    const zero_copy_xport_params _xport_params;
+    buffer_pool::sptr _recv_buffer_pool, _send_buffer_pool;
+    std::vector<boost::shared_ptr<nirio_zero_copy_msb> > _msb_pool;
+    std::vector<boost::shared_ptr<nirio_zero_copy_mrb> > _mrb_pool;
+    size_t _next_recv_buff_index, _next_send_buff_index;
+};
+
+
+nirio_zero_copy::sptr nirio_zero_copy::make(
+    uhd::niusrprio::niusrprio_session::sptr fpga_session,
+    const uint32_t instance,
+    const zero_copy_xport_params& default_buff_args,
+    const device_addr_t &hints
+){
+    //Initialize xport_params
+    zero_copy_xport_params xport_params = default_buff_args;
+
+    //The kernel buffer for this transport must be (num_frames * frame_size) big. Unlike ethernet,
+    //where the kernel buffer size is independent of the circular buffer size for the transport,
+    //it is possible for users to over constrain the system when they set the num_frames and the buff_size
+    //So we give buff_size priority over num_frames and throw an error if they conflict.
+
+    //RX
+    xport_params.recv_frame_size = size_t(hints.cast<double>("recv_frame_size", default_buff_args.recv_frame_size));
+
+    size_t usr_num_recv_frames = static_cast<size_t>(
+        hints.cast<double>("num_recv_frames", default_buff_args.num_recv_frames));
+    size_t usr_recv_buff_size = static_cast<size_t>(
+        hints.cast<double>("recv_buff_size", default_buff_args.num_recv_frames));
+
+    if (hints.has_key("num_recv_frames") and hints.has_key("recv_buff_size")) {
+        if (usr_recv_buff_size < xport_params.recv_frame_size)
+            throw uhd::value_error("recv_buff_size must be equal to or greater than (num_recv_frames * recv_frame_size)");
+
+        if ((usr_recv_buff_size/xport_params.recv_frame_size) != usr_num_recv_frames)
+            throw uhd::value_error("Conflicting values for recv_buff_size and num_recv_frames");
+    }
+
+    if (hints.has_key("recv_buff_size")) {
+        xport_params.num_recv_frames = std::max<size_t>(1, usr_recv_buff_size/xport_params.recv_frame_size);    //Round down
+    } else if (hints.has_key("num_recv_frames")) {
+        xport_params.num_recv_frames = usr_num_recv_frames;
+    }
+
+    //TX
+    xport_params.send_frame_size = size_t(hints.cast<double>("send_frame_size", default_buff_args.send_frame_size));
+
+    size_t usr_num_send_frames = static_cast<size_t>(
+        hints.cast<double>("num_send_frames", default_buff_args.num_send_frames));
+    size_t usr_send_buff_size = static_cast<size_t>(
+        hints.cast<double>("send_buff_size", default_buff_args.num_send_frames));
+
+    if (hints.has_key("num_send_frames") and hints.has_key("send_buff_size")) {
+        if (usr_send_buff_size < xport_params.send_frame_size)
+            throw uhd::value_error("send_buff_size must be equal to or greater than (num_send_frames * send_frame_size)");
+
+        if ((usr_send_buff_size/xport_params.send_frame_size) != usr_num_send_frames)
+            throw uhd::value_error("Conflicting values for send_buff_size and num_send_frames");
+    }
+
+    if (hints.has_key("send_buff_size")) {
+        xport_params.num_send_frames = std::max<size_t>(1, usr_send_buff_size/xport_params.send_frame_size);    //Round down
+    } else if (hints.has_key("num_send_frames")) {
+        xport_params.num_send_frames = usr_num_send_frames;
+    }
+
+    return nirio_zero_copy::sptr(new nirio_zero_copy_impl(fpga_session, instance, xport_params));
+}
+
diff --git a/host/lib/transport/super_recv_packet_handler.hpp b/host/lib/transport/super_recv_packet_handler.hpp
index 5080182d6..5fdf2594d 100644
--- a/host/lib/transport/super_recv_packet_handler.hpp
+++ b/host/lib/transport/super_recv_packet_handler.hpp
@@ -39,6 +39,13 @@
 #include <iostream>
 #include <vector>
 
+// Included for debugging
+#ifdef UHD_TXRX_DEBUG_PRINTS
+#include <boost/format.hpp>
+#include <boost/thread/thread.hpp>
+#include "boost/date_time/posix_time/posix_time.hpp"
+#endif
+
 namespace uhd{ namespace transport{ namespace sph{
 
 UHD_INLINE boost::uint32_t get_context_code(
@@ -76,6 +83,10 @@ public:
         _queue_error_for_next_call(false),
         _buffers_infos_index(0)
     {
+        #ifdef  ERROR_INJECT_DROPPED_PACKETS
+        recvd_packets = 0;
+        #endif
+
         this->resize(size);
         set_alignment_failure_threshold(1000);
     }
@@ -142,6 +153,32 @@ public:
     }
 
     /*!
+     * Flush all transports in the streamer:
+     * This calls into get_and_process_single_packet(),
+     * so the sequence and flow control are handled.
+     * However, the packet payload is discarded.
+     */
+    void flush_all(const double timeout = 0.0)
+    {
+        increment_buffer_info(); //increment to next buffer
+
+        for (size_t i = 0; i < _props.size(); i++)
+        {
+            while (true) //while (_props.at(i).get_buff(timeout));
+            {
+                //receive a single packet from the transport
+                try
+                {
+                    if (get_and_process_single_packet(i,
+                        get_prev_buffer_info(),
+                        get_curr_buffer_info(),
+                    timeout) == PACKET_TIMEOUT_ERROR) break;
+                }catch(...){}
+            }
+        }
+    }
+
+    /*!
      * Set the function to handle flow control
      * \param xport_chan which transport channel
      * \param handle_flowctrl the callback function
@@ -213,7 +250,12 @@ public:
             buffs, nsamps_per_buff, metadata, timeout
         );
 
-        if (one_packet) return accum_num_samps;
+        if (one_packet){
+#ifdef UHD_TXRX_DEBUG_PRINTS
+            dbg_gather_data(nsamps_per_buff, accum_num_samps, metadata, timeout, one_packet);
+#endif
+            return accum_num_samps;
+        }
 
         //first recv had an error code set, return immediately
         if (metadata.error_code != rx_metadata_t::ERROR_CODE_NONE) return accum_num_samps;
@@ -232,11 +274,13 @@ public:
             }
             accum_num_samps += num_samps;
         }
+#ifdef UHD_TXRX_DEBUG_PRINTS
+		dbg_gather_data(nsamps_per_buff, accum_num_samps, metadata, timeout, one_packet);
+#endif
         return accum_num_samps;
     }
 
 private:
-
     vrt_unpacker_type _vrt_unpacker;
     size_t _header_offset_words32;
     double _tick_rate, _samp_rate;
@@ -264,6 +308,13 @@ private:
 
     //! information stored for a received buffer
     struct per_buffer_info_type{
+        void reset()
+        {
+            buff.reset();
+            vrt_hdr = NULL;
+            time = time_spec_t(0.0);
+            copy_buff = NULL;
+        }
         managed_recv_buffer::sptr buff;
         const boost::uint32_t *vrt_hdr;
         vrt::if_packet_info_t ifpi;
@@ -280,6 +331,17 @@ private:
             data_bytes_to_copy(0),
             fragment_offset_in_samps(0)
         {/* NOP */}
+        void reset()
+        {
+            indexes_todo.set();
+            alignment_time = time_spec_t(0.0);
+            alignment_time_valid = false;
+            data_bytes_to_copy = 0;
+            fragment_offset_in_samps = 0;
+            metadata.reset();
+            for (size_t i = 0; i < size(); i++)
+                at(i).reset();
+        }
         boost::dynamic_bitset<> indexes_todo; //used in alignment logic
         time_spec_t alignment_time; //used in alignment logic
         bool alignment_time_valid; //used in alignment logic
@@ -305,6 +367,10 @@ private:
         PACKET_SEQUENCE_ERROR
     };
 
+    #ifdef  ERROR_INJECT_DROPPED_PACKETS
+    int recvd_packets;
+    #endif
+
     /*******************************************************************
      * Get and process a single packet from the transport:
      * Receive a single packet at the given index.
@@ -322,6 +388,16 @@ private:
         buff = _props[index].get_buff(timeout);
         if (buff.get() == NULL) return PACKET_TIMEOUT_ERROR;
 
+        #ifdef  ERROR_INJECT_DROPPED_PACKETS
+        if (++recvd_packets > 1000)
+        {
+            recvd_packets = 0;
+            buff.reset();
+            buff = _props[index].get_buff(timeout);
+            if (buff.get() == NULL) return PACKET_TIMEOUT_ERROR;
+        }
+        #endif
+
         //bounds check before extract
         size_t num_packet_words32 = buff->size()/sizeof(boost::uint32_t);
         if (num_packet_words32 <= _header_offset_words32){
@@ -339,7 +415,7 @@ private:
         //handle flow control
         if (_props[index].handle_flowctrl)
         {
-            if ((info.ifpi.packet_count % _props[index].fc_update_window/2) == 0)
+            if ((info.ifpi.packet_count % _props[index].fc_update_window) == 0)
             {
                 _props[index].handle_flowctrl(info.ifpi.packet_count);
             }
@@ -411,7 +487,10 @@ private:
      ******************************************************************/
     UHD_INLINE void get_aligned_buffs(double timeout){
 
+        get_prev_buffer_info().reset(); // no longer need the previous info - reset it for future use
+
         increment_buffer_info(); //increment to next buffer
+
         buffers_info_type &prev_info = get_prev_buffer_info();
         buffers_info_type &curr_info = get_curr_buffer_info();
         buffers_info_type &next_info = get_next_buffer_info();
@@ -440,12 +519,6 @@ private:
                     "The receive packet handler caught an exception.\n%s"
                 ) % e.what() << std::endl;
                 std::swap(curr_info, next_info); //save progress from curr -> next
-                curr_info.metadata.has_time_spec = false;
-                curr_info.metadata.time_spec = time_spec_t(0.0);
-                curr_info.metadata.more_fragments = false;
-                curr_info.metadata.fragment_offset = 0;
-                curr_info.metadata.start_of_burst = false;
-                curr_info.metadata.end_of_burst = false;
                 curr_info.metadata.error_code = rx_metadata_t::ERROR_CODE_BAD_PACKET;
                 return;
             }
@@ -470,10 +543,6 @@ private:
                 std::swap(curr_info, next_info); //save progress from curr -> next
                 curr_info.metadata.has_time_spec = next_info[index].ifpi.has_tsf;
                 curr_info.metadata.time_spec = next_info[index].time;
-                curr_info.metadata.more_fragments = false;
-                curr_info.metadata.fragment_offset = 0;
-                curr_info.metadata.start_of_burst = false;
-                curr_info.metadata.end_of_burst = false;
                 curr_info.metadata.error_code = rx_metadata_t::error_code_t(get_context_code(next_info[index].vrt_hdr, next_info[index].ifpi));
                 if (curr_info.metadata.error_code == rx_metadata_t::ERROR_CODE_OVERFLOW){
                     _props[index].handle_overflow();
@@ -483,12 +552,6 @@ private:
 
             case PACKET_TIMEOUT_ERROR:
                 std::swap(curr_info, next_info); //save progress from curr -> next
-                curr_info.metadata.has_time_spec = false;
-                curr_info.metadata.time_spec = time_spec_t(0.0);
-                curr_info.metadata.more_fragments = false;
-                curr_info.metadata.fragment_offset = 0;
-                curr_info.metadata.start_of_burst = false;
-                curr_info.metadata.end_of_burst = false;
                 curr_info.metadata.error_code = rx_metadata_t::ERROR_CODE_TIMEOUT;
                 return;
 
@@ -498,10 +561,7 @@ private:
                 curr_info.metadata.has_time_spec = prev_info.metadata.has_time_spec;
                 curr_info.metadata.time_spec = prev_info.metadata.time_spec + time_spec_t::from_ticks(
                     prev_info[index].ifpi.num_payload_words32*sizeof(boost::uint32_t)/_bytes_per_otw_item, _samp_rate);
-                curr_info.metadata.more_fragments = false;
-                curr_info.metadata.fragment_offset = 0;
-                curr_info.metadata.start_of_burst = false;
-                curr_info.metadata.end_of_burst = false;
+                curr_info.metadata.out_of_sequence = true;
                 curr_info.metadata.error_code = rx_metadata_t::ERROR_CODE_OVERFLOW;
                 UHD_MSG(fastpath) << "D";
                 return;
@@ -516,12 +576,6 @@ private:
                     "However, a timestamp match could not be determined.\n"
                 ) % iterations << std::endl;
                 std::swap(curr_info, next_info); //save progress from curr -> next
-                curr_info.metadata.has_time_spec = false;
-                curr_info.metadata.time_spec = time_spec_t(0.0);
-                curr_info.metadata.more_fragments = false;
-                curr_info.metadata.fragment_offset = 0;
-                curr_info.metadata.start_of_burst = false;
-                curr_info.metadata.end_of_burst = false;
                 curr_info.metadata.error_code = rx_metadata_t::ERROR_CODE_ALIGNMENT;
                 _props[index].handle_overflow();
                 return;
@@ -554,13 +608,8 @@ private:
         const size_t buffer_offset_bytes = 0
     ){
         //get the next buffer if the current one has expired
-        if (get_curr_buffer_info().data_bytes_to_copy == 0){
-
-            //reset current buffer info members for reuse
-            get_curr_buffer_info().fragment_offset_in_samps = 0;
-            get_curr_buffer_info().alignment_time_valid = false;
-            get_curr_buffer_info().indexes_todo.set();
-
+        if (get_curr_buffer_info().data_bytes_to_copy == 0)
+        {
             //perform receive with alignment logic
             get_aligned_buffs(timeout);
         }
@@ -641,6 +690,65 @@ private:
     size_t _convert_buffer_offset_bytes;
     size_t _convert_bytes_to_copy;
 
+    /*
+     * This last section is only for debugging purposes.
+     * It causes a lot of prints to stderr which can be piped to a file.
+     * Gathered data can be used to post process it with external tools.
+     */
+#ifdef UHD_TXRX_DEBUG_PRINTS
+    struct dbg_recv_stat_t {
+        dbg_recv_stat_t(long wc, size_t nspb, size_t nsr, uhd::rx_metadata_t md, double to, bool op, double rate):
+        wallclock(wc), nsamps_per_buff(nspb), nsamps_recv(nsr), metadata(md), timeout(to), one_packet(op), samp_rate(rate)
+        {}
+        long wallclock;
+        size_t nsamps_per_buff;
+        size_t nsamps_recv;
+        uhd::rx_metadata_t metadata;
+        double timeout;
+        bool one_packet;
+        double samp_rate;
+        // Create a formatted print line for all the info gathered in this struct.
+        std::string print_line() {
+            boost::format fmt("recv,%ld,%f,%i,%i,%s,%i,%s,%s,%s,%i,%s,%ld");
+            fmt % wallclock;
+            fmt % timeout % (int)nsamps_per_buff % (int) nsamps_recv;
+            fmt % (one_packet ? "true":"false");
+            fmt % metadata.error_code;
+            fmt % (metadata.start_of_burst ? "true":"false") % (metadata.end_of_burst ? "true":"false");
+            fmt % (metadata.more_fragments ? "true":"false") % (int)metadata.fragment_offset;
+            fmt % (metadata.has_time_spec ? "true":"false") % metadata.time_spec.to_ticks(samp_rate);
+            return fmt.str();
+        }
+    };
+
+    void dbg_gather_data(const size_t nsamps_per_buff, const size_t nsamps_recv,
+            uhd::rx_metadata_t &metadata, const double timeout,
+            const bool one_packet,
+            bool dbg_print_directly = true
+        )
+    {
+        // Initialize a struct with all available data. It can return a formatted string with all infos if wanted.
+        dbg_recv_stat_t data(boost::get_system_time().time_of_day().total_microseconds(),
+                nsamps_per_buff,
+                nsamps_recv,
+                metadata,
+                timeout,
+                one_packet,
+                _samp_rate
+            );
+        if(dbg_print_directly) {
+            dbg_print_err(data.print_line());
+        }
+    }
+
+
+
+    void dbg_print_err(std::string msg) {
+        std::string dbg_prefix("super_recv_packet_handler,");
+        msg = dbg_prefix + msg;
+        fprintf(stderr, "%s\n", msg.c_str());
+    }
+#endif
 };
 
 class recv_packet_streamer : public recv_packet_handler, public rx_streamer{
diff --git a/host/lib/transport/super_send_packet_handler.hpp b/host/lib/transport/super_send_packet_handler.hpp
index ae483d1f3..c2810842e 100644
--- a/host/lib/transport/super_send_packet_handler.hpp
+++ b/host/lib/transport/super_send_packet_handler.hpp
@@ -35,7 +35,18 @@
 #include <iostream>
 #include <vector>
 
-namespace uhd{ namespace transport{ namespace sph{
+#ifdef UHD_TXRX_DEBUG_PRINTS
+// Included for debugging
+#include <boost/format.hpp>
+#include <boost/thread/thread.hpp>
+#include "boost/date_time/posix_time/posix_time.hpp"
+#include <map>
+#include <fstream>
+#endif
+
+namespace uhd {
+namespace transport {
+namespace sph {
 
 /***********************************************************************
  * Super send packet handler
@@ -56,7 +67,7 @@ public:
      * \param size the number of transport channels
      */
     send_packet_handler(const size_t size = 1):
-        _next_packet_seq(0)
+        _next_packet_seq(0), _cached_metadata(false)
     {
         this->set_enable_trailer(true);
         this->resize(size);
@@ -183,6 +194,23 @@ public:
         if_packet_info.sob     = metadata.start_of_burst;
         if_packet_info.eob     = metadata.end_of_burst;
 
+        /*
+         * Metadata is cached when we get a send requesting a start of burst with no samples.
+         * It is applied here on the next call to send() that actually has samples to send.
+         */
+        if (_cached_metadata && nsamps_per_buff != 0)
+        {
+            // If the new metada has a time_spec, do not use the cached time_spec.
+            if (!metadata.has_time_spec)
+            {
+                if_packet_info.has_tsf = _metadata_cache.has_time_spec;
+                if_packet_info.tsf     = _metadata_cache.time_spec.to_ticks(_tick_rate);
+            }
+            if_packet_info.sob     = _metadata_cache.start_of_burst;
+            if_packet_info.eob     = _metadata_cache.end_of_burst;
+            _cached_metadata = false;
+        }
+
         if (nsamps_per_buff <= _max_samples_per_packet){
 
             //TODO remove this code when sample counts of zero are supported by hardware
@@ -190,13 +218,27 @@ public:
                 static const boost::uint64_t zero = 0;
                 _zero_buffs.resize(buffs.size(), &zero);
 
-                if (nsamps_per_buff == 0) return send_one_packet(
-                    _zero_buffs, 1, if_packet_info, timeout
-                ) & 0x0;
+                if (nsamps_per_buff == 0)
+                {
+                    // if this is a start of a burst and there are no samples
+                    if (metadata.start_of_burst)
+                    {
+                        // cache metadata and apply on the next send()
+                        _metadata_cache = metadata;
+                        _cached_metadata = true;
+                        return 0;
+                    } else {
+                        // send requests with no samples are handled here (such as end of burst)
+                        return send_one_packet(_zero_buffs, 1, if_packet_info, timeout) & 0x0;
+                    }
+                }
             #endif
 
-            return send_one_packet(buffs, nsamps_per_buff, if_packet_info, timeout);
-        }
+			size_t nsamps_sent = send_one_packet(buffs, nsamps_per_buff, if_packet_info, timeout);
+#ifdef UHD_TXRX_DEBUG_PRINTS
+			dbg_print_send(nsamps_per_buff, nsamps_sent, metadata, timeout);
+#endif
+			return nsamps_sent;        }
         size_t total_num_samps_sent = 0;
 
         //false until final fragment
@@ -226,11 +268,14 @@ public:
 
         //send the final fragment with the helper function
         if_packet_info.eob = metadata.end_of_burst;
-        return total_num_samps_sent + send_one_packet(
-            buffs, final_length,
-            if_packet_info, timeout,
-            total_num_samps_sent*_bytes_per_cpu_item
-        );
+		size_t nsamps_sent = total_num_samps_sent
+				+ send_one_packet(buffs, final_length, if_packet_info, timeout,
+					total_num_samps_sent * _bytes_per_cpu_item);
+#ifdef UHD_TXRX_DEBUG_PRINTS
+		dbg_print_send(nsamps_per_buff, nsamps_sent, metadata, timeout);
+
+#endif
+		return nsamps_sent;
     }
 
 private:
@@ -255,6 +300,53 @@ private:
     size_t _next_packet_seq;
     bool _has_tlr;
     async_receiver_type _async_receiver;
+    bool _cached_metadata;
+    uhd::tx_metadata_t _metadata_cache;
+
+#ifdef UHD_TXRX_DEBUG_PRINTS
+    struct dbg_send_stat_t {
+        dbg_send_stat_t(long wc, size_t nspb, size_t nss, uhd::tx_metadata_t md, double to, double rate):
+            wallclock(wc), nsamps_per_buff(nspb), nsamps_sent(nss), metadata(md), timeout(to), samp_rate(rate)
+        {}
+        long wallclock;
+        size_t nsamps_per_buff;
+        size_t nsamps_sent;
+        uhd::tx_metadata_t metadata;
+        double timeout;
+        double samp_rate;
+        // Create a formatted print line for all the info gathered in this struct.
+        std::string print_line() {
+            boost::format fmt("send,%ld,%f,%i,%i,%s,%s,%s,%ld");
+            fmt % wallclock;
+            fmt % timeout % (int)nsamps_per_buff % (int) nsamps_sent;
+            fmt % (metadata.start_of_burst ? "true":"false") % (metadata.end_of_burst ? "true":"false");
+            fmt % (metadata.has_time_spec ? "true":"false") % metadata.time_spec.to_ticks(samp_rate);
+            return fmt.str();
+        }
+    };
+
+    void dbg_print_send(size_t nsamps_per_buff, size_t nsamps_sent,
+            const uhd::tx_metadata_t &metadata, const double timeout,
+            bool dbg_print_directly = true)
+    {
+        dbg_send_stat_t data(boost::get_system_time().time_of_day().total_microseconds(),
+            nsamps_per_buff,
+            nsamps_sent,
+            metadata,
+            timeout,
+            _samp_rate
+        );
+        if(dbg_print_directly){
+            dbg_print_err(data.print_line());
+        }
+    }
+    void dbg_print_err(std::string msg) {
+        msg = "super_send_packet_handler," + msg;
+        fprintf(stderr, "%s\n", msg.c_str());
+    }
+
+
+#endif
 
     /*******************************************************************
      * Send a single packet:
@@ -266,6 +358,7 @@ private:
         const double timeout,
         const size_t buffer_offset_bytes = 0
     ){
+
         //load the rest of the if_packet_info in here
         if_packet_info.num_payload_bytes = nsamps_per_buff*_num_inputs*_bytes_per_otw_item;
         if_packet_info.num_payload_words32 = (if_packet_info.num_payload_bytes + 3/*round up*/)/sizeof(boost::uint32_t);
@@ -374,6 +467,8 @@ private:
     size_t _max_num_samps;
 };
 
-}}} //namespace
+} // namespace sph
+} // namespace transport
+} // namespace uhd
 
 #endif /* INCLUDED_LIBUHD_TRANSPORT_SUPER_SEND_PACKET_HANDLER_HPP */
diff --git a/host/lib/transport/tcp_zero_copy.cpp b/host/lib/transport/tcp_zero_copy.cpp
new file mode 100644
index 000000000..402bda1e8
--- /dev/null
+++ b/host/lib/transport/tcp_zero_copy.cpp
@@ -0,0 +1,225 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "udp_common.hpp"
+#include <uhd/transport/tcp_zero_copy.hpp>
+#include <uhd/transport/buffer_pool.hpp>
+#include <uhd/utils/msg.hpp>
+#include <uhd/utils/log.hpp>
+#include <uhd/utils/atomic.hpp>
+#include <boost/format.hpp>
+#include <boost/make_shared.hpp>
+#include <boost/thread/thread.hpp> //sleep
+#include <vector>
+
+using namespace uhd;
+using namespace uhd::transport;
+namespace asio = boost::asio;
+
+static const size_t DEFAULT_NUM_FRAMES = 32;
+static const size_t DEFAULT_FRAME_SIZE = 2048;
+
+/***********************************************************************
+ * Reusable managed receiver buffer:
+ *  - get_new performs the recv operation
+ **********************************************************************/
+class tcp_zero_copy_asio_mrb : public managed_recv_buffer{
+public:
+    tcp_zero_copy_asio_mrb(void *mem, int sock_fd, const size_t frame_size):
+        _mem(mem), _sock_fd(sock_fd), _frame_size(frame_size) { /*NOP*/ }
+
+    void release(void){
+        _claimer.release();
+    }
+
+    UHD_INLINE sptr get_new(const double timeout, size_t &index){
+        if (not _claimer.claim_with_wait(timeout)) return sptr();
+
+        #ifdef MSG_DONTWAIT //try a non-blocking recv() if supported
+        _len = ::recv(_sock_fd, (char *)_mem, _frame_size, MSG_DONTWAIT);
+        if (_len > 0){
+            index++; //advances the caller's buffer
+            return make(this, _mem, size_t(_len));
+        }
+        #endif
+
+        if (wait_for_recv_ready(_sock_fd, timeout)){
+            _len = ::recv(_sock_fd, (char *)_mem, _frame_size, 0);
+            index++; //advances the caller's buffer
+            return make(this, _mem, size_t(_len));
+        }
+
+        _claimer.release(); //undo claim
+        return sptr(); //null for timeout
+    }
+
+private:
+    void *_mem;
+    int _sock_fd;
+    size_t _frame_size;
+    ssize_t _len;
+    simple_claimer _claimer;
+};
+
+/***********************************************************************
+ * Reusable managed send buffer:
+ *  - commit performs the send operation
+ **********************************************************************/
+class tcp_zero_copy_asio_msb : public managed_send_buffer{
+public:
+    tcp_zero_copy_asio_msb(void *mem, int sock_fd, const size_t frame_size):
+        _mem(mem), _sock_fd(sock_fd), _frame_size(frame_size) { /*NOP*/ }
+
+    void release(void){
+        //Retry logic because send may fail with ENOBUFS.
+        //This is known to occur at least on some OSX systems.
+        //But it should be safe to always check for the error.
+        while (true)
+        {
+            this->commit(_frame_size); //always full size frames to avoid pkt coalescing
+            const ssize_t ret = ::send(_sock_fd, (const char *)_mem, size(), 0);
+            if (ret == ssize_t(size())) break;
+            if (ret == -1 and errno == ENOBUFS)
+            {
+                boost::this_thread::sleep(boost::posix_time::microseconds(1));
+                continue; //try to send again
+            }
+            UHD_ASSERT_THROW(ret == ssize_t(size()));
+        }
+        _claimer.release();
+    }
+
+    UHD_INLINE sptr get_new(const double timeout, size_t &index){
+        if (not _claimer.claim_with_wait(timeout)) return sptr();
+        index++; //advances the caller's buffer
+        return make(this, _mem, _frame_size);
+    }
+
+private:
+    void *_mem;
+    int _sock_fd;
+    size_t _frame_size;
+    simple_claimer _claimer;
+};
+
+/***********************************************************************
+ * Zero Copy TCP implementation with ASIO:
+ *   This is the portable zero copy implementation for systems
+ *   where a faster, platform specific solution is not available.
+ *   However, it is not a true zero copy implementation as each
+ *   send and recv requires a copy operation to/from userspace.
+ **********************************************************************/
+class tcp_zero_copy_asio_impl : public tcp_zero_copy{
+public:
+    typedef boost::shared_ptr<tcp_zero_copy_asio_impl> sptr;
+
+    tcp_zero_copy_asio_impl(
+        const std::string &addr,
+        const std::string &port,
+        const device_addr_t &hints
+    ):
+        _recv_frame_size(size_t(hints.cast<double>("recv_frame_size", DEFAULT_FRAME_SIZE))),
+        _num_recv_frames(size_t(hints.cast<double>("num_recv_frames", DEFAULT_NUM_FRAMES))),
+        _send_frame_size(size_t(hints.cast<double>("send_frame_size", DEFAULT_FRAME_SIZE))),
+        _num_send_frames(size_t(hints.cast<double>("num_send_frames", DEFAULT_NUM_FRAMES))),
+        _recv_buffer_pool(buffer_pool::make(_num_recv_frames, _recv_frame_size)),
+        _send_buffer_pool(buffer_pool::make(_num_send_frames, _send_frame_size)),
+        _next_recv_buff_index(0), _next_send_buff_index(0)
+    {
+        UHD_LOG << boost::format("Creating tcp transport for %s %s") % addr % port << std::endl;
+
+        //resolve the address
+        asio::ip::tcp::resolver resolver(_io_service);
+        asio::ip::tcp::resolver::query query(asio::ip::tcp::v4(), addr, port);
+        asio::ip::tcp::endpoint receiver_endpoint = *resolver.resolve(query);
+
+        //create, open, and connect the socket
+        _socket.reset(new asio::ip::tcp::socket(_io_service));
+        _socket->connect(receiver_endpoint);
+        _sock_fd = _socket->native();
+
+        //packets go out ASAP
+        asio::ip::tcp::no_delay option(true);
+        _socket->set_option(option);
+
+        //allocate re-usable managed receive buffers
+        for (size_t i = 0; i < get_num_recv_frames(); i++){
+            _mrb_pool.push_back(boost::make_shared<tcp_zero_copy_asio_mrb>(
+                _recv_buffer_pool->at(i), _sock_fd, get_recv_frame_size()
+            ));
+        }
+
+        //allocate re-usable managed send buffers
+        for (size_t i = 0; i < get_num_send_frames(); i++){
+            _msb_pool.push_back(boost::make_shared<tcp_zero_copy_asio_msb>(
+                _send_buffer_pool->at(i), _sock_fd, get_send_frame_size()
+            ));
+        }
+    }
+
+    /*******************************************************************
+     * Receive implementation:
+     * Block on the managed buffer's get call and advance the index.
+     ******************************************************************/
+    managed_recv_buffer::sptr get_recv_buff(double timeout){
+        if (_next_recv_buff_index == _num_recv_frames) _next_recv_buff_index = 0;
+        return _mrb_pool[_next_recv_buff_index]->get_new(timeout, _next_recv_buff_index);
+    }
+
+    size_t get_num_recv_frames(void) const {return _num_recv_frames;}
+    size_t get_recv_frame_size(void) const {return _recv_frame_size;}
+
+    /*******************************************************************
+     * Send implementation:
+     * Block on the managed buffer's get call and advance the index.
+     ******************************************************************/
+    managed_send_buffer::sptr get_send_buff(double timeout){
+        if (_next_send_buff_index == _num_send_frames) _next_send_buff_index = 0;
+        return _msb_pool[_next_send_buff_index]->get_new(timeout, _next_send_buff_index);
+    }
+
+    size_t get_num_send_frames(void) const {return _num_send_frames;}
+    size_t get_send_frame_size(void) const {return _send_frame_size;}
+
+private:
+    //memory management -> buffers and fifos
+    const size_t _recv_frame_size, _num_recv_frames;
+    const size_t _send_frame_size, _num_send_frames;
+    buffer_pool::sptr _recv_buffer_pool, _send_buffer_pool;
+    std::vector<boost::shared_ptr<tcp_zero_copy_asio_msb> > _msb_pool;
+    std::vector<boost::shared_ptr<tcp_zero_copy_asio_mrb> > _mrb_pool;
+    size_t _next_recv_buff_index, _next_send_buff_index;
+
+    //asio guts -> socket and service
+    asio::io_service        _io_service;
+    boost::shared_ptr<asio::ip::tcp::socket> _socket;
+    int                     _sock_fd;
+};
+
+/***********************************************************************
+ * TCP zero copy make function
+ **********************************************************************/
+zero_copy_if::sptr tcp_zero_copy::make(
+    const std::string &addr,
+    const std::string &port,
+    const device_addr_t &hints
+){
+    zero_copy_if::sptr xport;
+    xport.reset(new tcp_zero_copy_asio_impl(addr, port, hints));
+    while (xport->get_recv_buff(0.0)){} //flush
+    return xport;
+}
diff --git a/host/lib/transport/udp_wsa_zero_copy.cpp b/host/lib/transport/udp_wsa_zero_copy.cpp
index 6fe4e3cad..031d26374 100644
--- a/host/lib/transport/udp_wsa_zero_copy.cpp
+++ b/host/lib/transport/udp_wsa_zero_copy.cpp
@@ -182,14 +182,15 @@ public:
     udp_zero_copy_wsa_impl(
         const std::string &addr,
         const std::string &port,
+        zero_copy_xport_params& xport_params,
         const device_addr_t &hints
     ):
-        _recv_frame_size(size_t(hints.cast<double>("recv_frame_size", udp_simple::mtu))),
-        _num_recv_frames(size_t(hints.cast<double>("num_recv_frames", DEFAULT_NUM_FRAMES))),
-        _send_frame_size(size_t(hints.cast<double>("send_frame_size", udp_simple::mtu))),
-        _num_send_frames(size_t(hints.cast<double>("num_send_frames", DEFAULT_NUM_FRAMES))),
-        _recv_buffer_pool(buffer_pool::make(_num_recv_frames, _recv_frame_size)),
-        _send_buffer_pool(buffer_pool::make(_num_send_frames, _send_frame_size)),
+        _recv_frame_size(xport_params.recv_frame_size),
+        _num_recv_frames(xport_params.num_recv_frames),
+        _send_frame_size(xport_params.send_frame_size),
+        _num_send_frames(xport_params.num_send_frames),
+        _recv_buffer_pool(buffer_pool::make(xport_params.num_recv_frames, xport_params.recv_frame_size)),
+        _send_buffer_pool(buffer_pool::make(xport_params.num_send_frames, xport_params.send_frame_size)),
         _next_recv_buff_index(0), _next_send_buff_index(0)
     {
         #ifdef CHECK_REG_SEND_THRESH
@@ -294,7 +295,17 @@ private:
 udp_zero_copy::sptr udp_zero_copy::make(
     const std::string &addr,
     const std::string &port,
+    const zero_copy_xport_params &default_buff_args,
+    udp_zero_copy::buff_params& buff_params_out,
     const device_addr_t &hints
 ){
-    return sptr(new udp_zero_copy_wsa_impl(addr, port, hints));
+    //Initialize xport_params
+    zero_copy_xport_params xport_params = default_buff_args;
+
+    xport_params.recv_frame_size = size_t(hints.cast<double>("recv_frame_size", default_buff_args.recv_frame_size));
+    xport_params.num_recv_frames = size_t(hints.cast<double>("num_recv_frames", default_buff_args.num_recv_frames));
+    xport_params.send_frame_size = size_t(hints.cast<double>("send_frame_size", default_buff_args.send_frame_size));
+    xport_params.num_send_frames = size_t(hints.cast<double>("num_send_frames", default_buff_args.num_send_frames));
+    
+    return sptr(new udp_zero_copy_wsa_impl(addr, port, xport_params, hints));
 }
diff --git a/host/lib/transport/udp_zero_copy.cpp b/host/lib/transport/udp_zero_copy.cpp
index 7b6a476f5..adc7d5585 100644
--- a/host/lib/transport/udp_zero_copy.cpp
+++ b/host/lib/transport/udp_zero_copy.cpp
@@ -158,14 +158,14 @@ public:
     udp_zero_copy_asio_impl(
         const std::string &addr,
         const std::string &port,
-        const device_addr_t &hints
+        const zero_copy_xport_params& xport_params
     ):
-        _recv_frame_size(size_t(hints.cast<double>("recv_frame_size", udp_simple::mtu))),
-        _num_recv_frames(size_t(hints.cast<double>("num_recv_frames", DEFAULT_NUM_FRAMES))),
-        _send_frame_size(size_t(hints.cast<double>("send_frame_size", udp_simple::mtu))),
-        _num_send_frames(size_t(hints.cast<double>("num_send_frames", DEFAULT_NUM_FRAMES))),
-        _recv_buffer_pool(buffer_pool::make(_num_recv_frames, _recv_frame_size)),
-        _send_buffer_pool(buffer_pool::make(_num_send_frames, _send_frame_size)),
+        _recv_frame_size(xport_params.recv_frame_size),
+        _num_recv_frames(xport_params.num_recv_frames),
+        _send_frame_size(xport_params.send_frame_size),
+        _num_send_frames(xport_params.num_send_frames),
+        _recv_buffer_pool(buffer_pool::make(xport_params.num_recv_frames, xport_params.recv_frame_size)),
+        _send_buffer_pool(buffer_pool::make(xport_params.num_send_frames, xport_params.send_frame_size)),
         _next_recv_buff_index(0), _next_send_buff_index(0)
     {
         UHD_LOG << boost::format("Creating udp transport for %s %s") % addr % port << std::endl;
@@ -256,11 +256,12 @@ private:
 /***********************************************************************
  * UDP zero copy make function
  **********************************************************************/
-template<typename Opt> static void resize_buff_helper(
+template<typename Opt> static size_t resize_buff_helper(
     udp_zero_copy_asio_impl::sptr udp_trans,
     const size_t target_size,
     const std::string &name
 ){
+    size_t actual_size = 0;
     std::string help_message;
     #if defined(UHD_PLATFORM_LINUX)
         help_message = str(boost::format(
@@ -270,7 +271,7 @@ template<typename Opt> static void resize_buff_helper(
 
     //resize the buffer if size was provided
     if (target_size > 0){
-        size_t actual_size = udp_trans->resize_buff<Opt>(target_size);
+        actual_size = udp_trans->resize_buff<Opt>(target_size);
         UHD_LOG << boost::format(
             "Target %s sock buff size: %d bytes\n"
             "Actual %s sock buff size: %d bytes"
@@ -282,24 +283,54 @@ template<typename Opt> static void resize_buff_helper(
             "See the transport application notes on buffer resizing.\n%s"
         ) % name % target_size % actual_size % help_message;
     }
+
+    return actual_size;
 }
 
 udp_zero_copy::sptr udp_zero_copy::make(
     const std::string &addr,
     const std::string &port,
+    const zero_copy_xport_params &default_buff_args,
+    udp_zero_copy::buff_params& buff_params_out,
     const device_addr_t &hints
 ){
-    udp_zero_copy_asio_impl::sptr udp_trans(
-        new udp_zero_copy_asio_impl(addr, port, hints)
-    );
+    //Initialize xport_params
+    zero_copy_xport_params xport_params = default_buff_args;
+
+    xport_params.recv_frame_size = size_t(hints.cast<double>("recv_frame_size", default_buff_args.recv_frame_size));
+    xport_params.num_recv_frames = size_t(hints.cast<double>("num_recv_frames", default_buff_args.num_recv_frames));
+    xport_params.send_frame_size = size_t(hints.cast<double>("send_frame_size", default_buff_args.send_frame_size));
+    xport_params.num_send_frames = size_t(hints.cast<double>("num_send_frames", default_buff_args.num_send_frames));
 
     //extract buffer size hints from the device addr
-    size_t recv_buff_size = size_t(hints.cast<double>("recv_buff_size", 0.0));
-    size_t send_buff_size = size_t(hints.cast<double>("send_buff_size", 0.0));
+    size_t usr_recv_buff_size = size_t(hints.cast<double>("recv_buff_size", 0.0));
+    size_t usr_send_buff_size = size_t(hints.cast<double>("send_buff_size", 0.0));
+
+    if (hints.has_key("recv_buff_size")) {
+        if (usr_recv_buff_size < xport_params.recv_frame_size * xport_params.num_recv_frames) {
+            throw uhd::value_error((boost::format(
+                "recv_buff_size must be equal to or greater than (num_recv_frames * recv_frame_size) where num_recv_frames=%d, recv_frame_size=%d")
+                % xport_params.num_recv_frames % xport_params.recv_frame_size).str());
+        }
+    }
+
+    if (hints.has_key("send_buff_size")) {
+        if (usr_send_buff_size < xport_params.send_frame_size * xport_params.num_send_frames) {
+            throw uhd::value_error((boost::format(
+                "send_buff_size must be equal to or greater than (num_send_frames * send_frame_size) where num_send_frames=%d, send_frame_size=%d")
+                % xport_params.num_send_frames % xport_params.send_frame_size).str());
+        }
+    }
+
+    udp_zero_copy_asio_impl::sptr udp_trans(
+        new udp_zero_copy_asio_impl(addr, port, xport_params)
+    );
 
     //call the helper to resize send and recv buffers
-    resize_buff_helper<asio::socket_base::receive_buffer_size>(udp_trans, recv_buff_size, "recv");
-    resize_buff_helper<asio::socket_base::send_buffer_size>   (udp_trans, send_buff_size, "send");
+    buff_params_out.recv_buff_size =
+        resize_buff_helper<asio::socket_base::receive_buffer_size>(udp_trans, usr_recv_buff_size, "recv");
+    buff_params_out.send_buff_size =
+        resize_buff_helper<asio::socket_base::send_buffer_size>   (udp_trans, usr_send_buff_size, "send");
 
     return udp_trans;
 }
diff --git a/host/lib/transport/xport_benchmarker.cpp b/host/lib/transport/xport_benchmarker.cpp
new file mode 100644
index 000000000..d58dbea47
--- /dev/null
+++ b/host/lib/transport/xport_benchmarker.cpp
@@ -0,0 +1,155 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "xport_benchmarker.hpp"
+
+namespace uhd { namespace transport {
+
+const device_addr_t& xport_benchmarker::benchmark_throughput_chdr
+(
+    zero_copy_if::sptr tx_transport,
+    zero_copy_if::sptr rx_transport,
+    boost::uint32_t sid,
+    bool big_endian,
+    boost::uint32_t duration_ms)
+{
+    vrt::if_packet_info_t pkt_info;
+    _initialize_chdr(tx_transport, rx_transport, sid, pkt_info);
+    _reset_counters();
+    boost::posix_time::ptime start_time(boost::posix_time::microsec_clock::local_time());
+
+    _tx_thread.reset(new boost::thread(boost::bind(&xport_benchmarker::_stream_tx, this, tx_transport.get(), &pkt_info, big_endian)));
+    _rx_thread.reset(new boost::thread(boost::bind(&xport_benchmarker::_stream_rx, this, rx_transport.get(), &pkt_info, big_endian)));
+
+    boost::this_thread::sleep(boost::posix_time::milliseconds(duration_ms));
+
+    _tx_thread->interrupt();
+    _rx_thread->interrupt();
+    _tx_thread->join();
+    _rx_thread->join();
+
+    boost::posix_time::ptime stop_time(boost::posix_time::microsec_clock::local_time());
+    double duration_s = ((double)(stop_time-start_time).total_microseconds())/1e6;
+
+    boost::uint64_t tx_bytes = pkt_info.num_payload_words32*sizeof(uint32_t)*_num_tx_packets;
+    boost::uint64_t rx_bytes = pkt_info.num_payload_words32*sizeof(uint32_t)*_num_rx_packets;
+    double tx_rate = (((double)tx_bytes)/duration_s);
+    double rx_rate = (((double)rx_bytes)/duration_s);
+
+    _results["TX-Bytes"] = (boost::format("%.2fMB") % (tx_bytes/(1024*1024))).str();
+    _results["RX-Bytes"] = (boost::format("%.2fMB") % (rx_bytes/(1024*1024))).str();
+    _results["TX-Throughput"] = (boost::format("%.2fMB/s") % (tx_rate/(1024*1024))).str();
+    _results["RX-Throughput"] = (boost::format("%.2fMB/s") % (rx_rate/(1024*1024))).str();
+    _results["TX-Timeouts"] = boost::lexical_cast<std::string>(_num_tx_timeouts);
+    _results["RX-Timeouts"] = boost::lexical_cast<std::string>(_num_rx_timeouts);
+    _results["Data-Errors"] = boost::lexical_cast<std::string>(_num_data_errors);
+
+    return _results;
+}
+
+void xport_benchmarker::_stream_tx(zero_copy_if* transport, vrt::if_packet_info_t* pkt_info, bool big_endian)
+{
+    while (not boost::this_thread::interruption_requested()) {
+        managed_send_buffer::sptr buff = transport->get_send_buff(_tx_timeout);
+        if (buff) {
+            boost::uint32_t *packet_buff = buff->cast<boost::uint32_t *>();
+            //Populate packet
+            if (big_endian) {
+                vrt::if_hdr_pack_be(packet_buff, *pkt_info);
+            } else {
+                vrt::if_hdr_pack_le(packet_buff, *pkt_info);
+            }
+            //send the buffer over the interface
+            buff->commit(sizeof(boost::uint32_t)*(pkt_info->num_packet_words32));
+            _num_tx_packets++;
+        } else {
+            _num_tx_timeouts++;
+        }
+    }
+}
+
+void xport_benchmarker::_stream_rx(zero_copy_if* transport, const vrt::if_packet_info_t* exp_pkt_info, bool big_endian)
+{
+    while (not boost::this_thread::interruption_requested()) {
+        managed_recv_buffer::sptr buff = transport->get_recv_buff(_rx_timeout);
+        if (buff) {
+            //Extract packet info
+            vrt::if_packet_info_t pkt_info;
+            pkt_info.link_type = exp_pkt_info->link_type;
+            pkt_info.num_packet_words32 = buff->size()/sizeof(boost::uint32_t);
+            const boost::uint32_t *packet_buff = buff->cast<const boost::uint32_t *>();
+
+            _num_rx_packets++;
+
+            //unpacking can fail
+            try {
+                if (big_endian) {
+                    vrt::if_hdr_unpack_be(packet_buff, pkt_info);
+                } else {
+                    vrt::if_hdr_unpack_le(packet_buff, pkt_info);
+                }
+
+                if (exp_pkt_info->packet_type != pkt_info.packet_type ||
+                    exp_pkt_info->num_payload_bytes != pkt_info.num_payload_bytes) {
+                    _num_data_errors++;
+                }
+            } catch(const std::exception &ex) {
+                _num_data_errors++;
+            }
+        } else {
+            _num_rx_timeouts++;
+        }
+    }
+}
+
+void xport_benchmarker::_reset_counters(void)
+{
+    _num_tx_packets = 0;
+    _num_rx_packets = 0;
+    _num_tx_timeouts = 0;
+    _num_rx_timeouts = 0;
+    _num_data_errors = 0;
+}
+
+void xport_benchmarker::_initialize_chdr(
+    zero_copy_if::sptr tx_transport,
+    zero_copy_if::sptr rx_transport,
+    boost::uint32_t sid,
+    vrt::if_packet_info_t& pkt_info)
+{
+    _tx_timeout = 0.5;
+    _rx_timeout = 0.5;
+
+    size_t frame_size = std::min(tx_transport->get_send_frame_size(), rx_transport->get_recv_frame_size());
+
+    pkt_info.link_type = vrt::if_packet_info_t::LINK_TYPE_CHDR;
+    pkt_info.packet_type = vrt::if_packet_info_t::PACKET_TYPE_DATA;
+    pkt_info.num_packet_words32 = (frame_size/sizeof(boost::uint32_t));
+    pkt_info.num_payload_words32 = pkt_info.num_packet_words32 - 2;
+    pkt_info.num_payload_bytes = pkt_info.num_payload_words32*sizeof(boost::uint32_t);
+    pkt_info.packet_count = 0;
+    pkt_info.sob = false;
+    pkt_info.eob = false;
+    pkt_info.sid = sid;
+    pkt_info.has_sid = true;
+    pkt_info.has_cid = false;
+    pkt_info.has_tsi = false;
+    pkt_info.has_tsf = false;
+    pkt_info.has_tlr = false;
+}
+
+}}
diff --git a/host/lib/transport/xport_benchmarker.hpp b/host/lib/transport/xport_benchmarker.hpp
new file mode 100644
index 000000000..9fca8d1fb
--- /dev/null
+++ b/host/lib/transport/xport_benchmarker.hpp
@@ -0,0 +1,77 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_LIBUHD_XPORT_BENCHMARKER_HPP
+#define INCLUDED_LIBUHD_XPORT_BENCHMARKER_HPP
+
+#include <uhd/transport/zero_copy.hpp>
+#include <uhd/types/device_addr.hpp>
+#include <uhd/utils/msg.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/thread/thread.hpp>
+#include <uhd/transport/vrt_if_packet.hpp>
+
+namespace uhd { namespace transport {
+
+//Test class to benchmark a low-level transport object with a VITA/C-VITA data stream
+class xport_benchmarker : boost::noncopyable {
+public:
+    const device_addr_t& benchmark_throughput_chdr(
+        zero_copy_if::sptr tx_transport,
+        zero_copy_if::sptr rx_transport,
+        boost::uint32_t sid,
+        bool big_endian,
+        boost::uint32_t duration_ms);
+
+private:
+    void _stream_tx(
+        zero_copy_if* transport,
+        vrt::if_packet_info_t* pkt_info,
+        bool big_endian);
+
+    void _stream_rx(
+        zero_copy_if* transport,
+        const vrt::if_packet_info_t* exp_pkt_info,
+        bool big_endian);
+
+    void _initialize_chdr(
+        zero_copy_if::sptr tx_transport,
+        zero_copy_if::sptr rx_transport,
+        boost::uint32_t sid,
+        vrt::if_packet_info_t& pkt_info);
+
+    void _reset_counters(void);
+
+    boost::shared_ptr<boost::thread>    _tx_thread;
+    boost::shared_ptr<boost::thread>    _rx_thread;
+
+    boost::uint64_t     _num_tx_packets;
+    boost::uint64_t     _num_rx_packets;
+    boost::uint64_t     _num_tx_timeouts;
+    boost::uint64_t     _num_rx_timeouts;
+    boost::uint64_t     _num_data_errors;
+
+    double              _tx_timeout;
+    double              _rx_timeout;
+
+    device_addr_t       _results;
+};
+
+
+}} //namespace
+
+#endif /* INCLUDED_LIBUHD_XPORT_BENCHMARKER_HPP */
diff --git a/host/lib/usrp/CMakeLists.txt b/host/lib/usrp/CMakeLists.txt
index f8c817df5..c8c2e6a8d 100644
--- a/host/lib/usrp/CMakeLists.txt
+++ b/host/lib/usrp/CMakeLists.txt
@@ -37,4 +37,5 @@ INCLUDE_SUBDIRECTORY(usrp1)
 INCLUDE_SUBDIRECTORY(usrp2)
 INCLUDE_SUBDIRECTORY(b100)
 INCLUDE_SUBDIRECTORY(e100)
+INCLUDE_SUBDIRECTORY(x300)
 INCLUDE_SUBDIRECTORY(b200)
diff --git a/host/lib/usrp/b100/b100_impl.cpp b/host/lib/usrp/b100/b100_impl.cpp
index 305ba42a7..a47856b07 100644
--- a/host/lib/usrp/b100/b100_impl.cpp
+++ b/host/lib/usrp/b100/b100_impl.cpp
@@ -52,9 +52,9 @@ static device_addrs_t b100_find(const device_addr_t &hint)
     //return an empty list of addresses when type is set to non-b100
     if (hint.has_key("type") and hint["type"] != "b100") return b100_addrs;
 
-    //Return an empty list of addresses when an address is specified,
-    //since an address is intended for a different, non-USB, device.
-    if (hint.has_key("addr")) return b100_addrs;
+    //Return an empty list of addresses when an address or resource is specified,
+    //since an address and resource is intended for a different, non-USB, device.
+    if (hint.has_key("addr") || hint.has_key("resource")) return b100_addrs;
 
     unsigned int vid, pid;
 
diff --git a/host/lib/usrp/b100/b100_impl.hpp b/host/lib/usrp/b100/b100_impl.hpp
index ab83c80a3..7d71d5ec3 100644
--- a/host/lib/usrp/b100/b100_impl.hpp
+++ b/host/lib/usrp/b100/b100_impl.hpp
@@ -105,8 +105,6 @@ public:
     bool recv_async_msg(uhd::async_metadata_t &, double);
 
 private:
-    uhd::property_tree::sptr _tree;
-
     //controllers
     fifo_ctrl_excelsior::sptr _fifo_ctrl;
     i2c_core_200::sptr _fpga_i2c_ctrl;
@@ -129,11 +127,6 @@ private:
     uhd::usrp::dboard_manager::sptr _dboard_manager;
     uhd::usrp::dboard_iface::sptr _dboard_iface;
 
-    //device properties interface
-    uhd::property_tree::sptr get_tree(void) const{
-        return _tree;
-    }
-
     std::vector<boost::weak_ptr<uhd::rx_streamer> > _rx_streamers;
     std::vector<boost::weak_ptr<uhd::tx_streamer> > _tx_streamers;
 
diff --git a/host/lib/usrp/b200/b200_impl.cpp b/host/lib/usrp/b200/b200_impl.cpp
index ab437af6b..8ed8e99af 100644
--- a/host/lib/usrp/b200/b200_impl.cpp
+++ b/host/lib/usrp/b200/b200_impl.cpp
@@ -53,9 +53,9 @@ static device_addrs_t b200_find(const device_addr_t &hint)
     //return an empty list of addresses when type is set to non-b200
     if (hint.has_key("type") and hint["type"] != "b200") return b200_addrs;
 
-    //Return an empty list of addresses when an address is specified,
-    //since an address is intended for a different, non-USB, device.
-    if (hint.has_key("addr")) return b200_addrs;
+    //Return an empty list of addresses when an address or resource is specified,
+    //since an address and resource is intended for a different, non-USB, device.
+    if (hint.has_key("addr") || hint.has_key("resource")) return b200_addrs;
 
     unsigned int vid, pid;
 
@@ -332,7 +332,7 @@ b200_impl::b200_impl(const device_addr_t &device_addr)
         data_xport_args    // param hints
     );
     while (_data_transport->get_recv_buff(0.0)){} //flush ctrl xport
-    _demux.reset(new recv_packet_demuxer_3000(_data_transport));
+    _demux = recv_packet_demuxer_3000::make(_data_transport);
 
     ////////////////////////////////////////////////////////////////////
     // Init codec - turns on clocks
diff --git a/host/lib/usrp/b200/b200_impl.hpp b/host/lib/usrp/b200/b200_impl.hpp
index bee42679b..c88d14ad5 100644
--- a/host/lib/usrp/b200/b200_impl.hpp
+++ b/host/lib/usrp/b200/b200_impl.hpp
@@ -80,8 +80,9 @@ static const boost::uint32_t B200_LOCAL_RESP_SID = FLIP_SID(B200_LOCAL_CTRL_SID)
  **********************************************************************/
 
 //! Implementation guts
-struct b200_impl : public uhd::device
+class b200_impl : public uhd::device
 {
+public:
     //structors
     b200_impl(const uhd::device_addr_t &);
     ~b200_impl(void);
@@ -91,8 +92,7 @@ struct b200_impl : public uhd::device
     uhd::tx_streamer::sptr get_tx_stream(const uhd::stream_args_t &args);
     bool recv_async_msg(uhd::async_metadata_t &, double);
 
-    uhd::property_tree::sptr _tree;
-
+private:
     //controllers
     b200_iface::sptr _iface;
     radio_ctrl_core_3000::sptr _local_ctrl;
@@ -104,13 +104,7 @@ struct b200_impl : public uhd::device
     //transports
     uhd::transport::zero_copy_if::sptr _data_transport;
     uhd::transport::zero_copy_if::sptr _ctrl_transport;
-    boost::shared_ptr<uhd::usrp::recv_packet_demuxer_3000> _demux;
-
-    //device properties interface
-    uhd::property_tree::sptr get_tree(void) const
-    {
-        return _tree;
-    }
+    uhd::usrp::recv_packet_demuxer_3000::sptr _demux;
 
     boost::weak_ptr<uhd::rx_streamer> _rx_streamer;
     boost::weak_ptr<uhd::tx_streamer> _tx_streamer;
diff --git a/host/lib/usrp/common/recv_packet_demuxer_3000.hpp b/host/lib/usrp/common/recv_packet_demuxer_3000.hpp
index 77bdebab0..ec930f3ad 100644
--- a/host/lib/usrp/common/recv_packet_demuxer_3000.hpp
+++ b/host/lib/usrp/common/recv_packet_demuxer_3000.hpp
@@ -28,11 +28,18 @@
 #include <uhd/utils/byteswap.hpp>
 #include <queue>
 #include <map>
+#include <boost/enable_shared_from_this.hpp>
 
 namespace uhd{ namespace usrp{
 
-    struct recv_packet_demuxer_3000
+    struct recv_packet_demuxer_3000 : boost::enable_shared_from_this<recv_packet_demuxer_3000>
     {
+        typedef boost::shared_ptr<recv_packet_demuxer_3000> sptr;
+        static sptr make(transport::zero_copy_if::sptr xport)
+        {
+            return sptr(new recv_packet_demuxer_3000(xport));
+        }
+
         recv_packet_demuxer_3000(transport::zero_copy_if::sptr xport):
             _xport(xport)
         {/*NOP*/}
@@ -120,6 +127,8 @@ namespace uhd{ namespace usrp{
             }
         }
 
+        transport::zero_copy_if::sptr make_proxy(const boost::uint32_t sid);
+
         typedef std::queue<transport::managed_recv_buffer::sptr> queue_type_t;
         std::map<boost::uint32_t, queue_type_t> _queues;
         transport::zero_copy_if::sptr _xport;
@@ -130,6 +139,42 @@ namespace uhd{ namespace usrp{
         boost::mutex mutex;
     };
 
+    struct recv_packet_demuxer_proxy_3000 : transport::zero_copy_if
+    {
+        recv_packet_demuxer_proxy_3000(recv_packet_demuxer_3000::sptr demux, transport::zero_copy_if::sptr xport, const boost::uint32_t sid):
+            _demux(demux), _xport(xport), _sid(sid)
+        {
+            _demux->realloc_sid(_sid); //causes clear
+        }
+
+        ~recv_packet_demuxer_proxy_3000(void)
+        {
+            _demux->realloc_sid(_sid); //causes clear
+        }
+
+        size_t get_num_recv_frames(void) const {return _xport->get_num_recv_frames();}
+        size_t get_recv_frame_size(void) const {return _xport->get_recv_frame_size();}
+        transport::managed_recv_buffer::sptr get_recv_buff(double timeout)
+        {
+            return _demux->get_recv_buff(_sid, timeout);
+        }
+        size_t get_num_send_frames(void) const {return _xport->get_num_send_frames();}
+        size_t get_send_frame_size(void) const {return _xport->get_send_frame_size();}
+        transport::managed_send_buffer::sptr get_send_buff(double timeout)
+        {
+            return _xport->get_send_buff(timeout);
+        }
+
+        recv_packet_demuxer_3000::sptr _demux;
+        transport::zero_copy_if::sptr _xport;
+        const boost::uint32_t _sid;
+    };
+
+    inline transport::zero_copy_if::sptr recv_packet_demuxer_3000::make_proxy(const boost::uint32_t sid)
+    {
+        return transport::zero_copy_if::sptr(new recv_packet_demuxer_proxy_3000(this->shared_from_this(), _xport, sid));
+    }
+
 }} //namespace uhd::usrp
 
 #endif /* INCLUDED_LIBUHD_USRP_COMMON_RECV_PACKET_DEMUXER_3000_HPP */
diff --git a/host/lib/usrp/cores/gpio_core_200.cpp b/host/lib/usrp/cores/gpio_core_200.cpp
index 51c23aa4b..e55f1f51e 100644
--- a/host/lib/usrp/cores/gpio_core_200.cpp
+++ b/host/lib/usrp/cores/gpio_core_200.cpp
@@ -45,8 +45,8 @@ public:
     void set_gpio_ddr(const unit_t unit, const boost::uint16_t value){
         _gpio_ddr[unit] = value; //shadow
         _iface->poke32(REG_GPIO_DDR, //update the 32 bit register
-            (boost::uint32_t(_gpio_ddr[dboard_iface::UNIT_RX]) << unit2shit(dboard_iface::UNIT_RX)) |
-            (boost::uint32_t(_gpio_ddr[dboard_iface::UNIT_TX]) << unit2shit(dboard_iface::UNIT_TX))
+            (boost::uint32_t(_gpio_ddr[dboard_iface::UNIT_RX]) << shift_by_unit(dboard_iface::UNIT_RX)) |
+            (boost::uint32_t(_gpio_ddr[dboard_iface::UNIT_TX]) << shift_by_unit(dboard_iface::UNIT_TX))
         );
     }
 
@@ -56,7 +56,7 @@ public:
     }
 
     boost::uint16_t read_gpio(const unit_t unit){
-        return boost::uint16_t(_iface->peek32(_rb_addr) >> unit2shit(unit));
+        return boost::uint16_t(_iface->peek32(_rb_addr) >> shift_by_unit(unit));
     }
 
 private:
@@ -68,7 +68,7 @@ private:
     uhd::dict<unit_t, boost::uint16_t> _pin_ctrl, _gpio_out, _gpio_ddr;
     uhd::dict<unit_t, uhd::dict<atr_reg_t, boost::uint16_t> > _atr_regs;
 
-    unsigned unit2shit(const unit_t unit){
+    unsigned shift_by_unit(const unit_t unit){
         return (unit == dboard_iface::UNIT_RX)? 0 : 16;
     }
 
@@ -81,16 +81,16 @@ private:
 
     void update(const atr_reg_t atr, const size_t addr){
         const boost::uint32_t atr_val =
-            (boost::uint32_t(_atr_regs[dboard_iface::UNIT_RX][atr]) << unit2shit(dboard_iface::UNIT_RX)) |
-            (boost::uint32_t(_atr_regs[dboard_iface::UNIT_TX][atr]) << unit2shit(dboard_iface::UNIT_TX));
+            (boost::uint32_t(_atr_regs[dboard_iface::UNIT_RX][atr]) << shift_by_unit(dboard_iface::UNIT_RX)) |
+            (boost::uint32_t(_atr_regs[dboard_iface::UNIT_TX][atr]) << shift_by_unit(dboard_iface::UNIT_TX));
 
         const boost::uint32_t gpio_val =
-            (boost::uint32_t(_gpio_out[dboard_iface::UNIT_RX]) << unit2shit(dboard_iface::UNIT_RX)) |
-            (boost::uint32_t(_gpio_out[dboard_iface::UNIT_TX]) << unit2shit(dboard_iface::UNIT_TX));
+            (boost::uint32_t(_gpio_out[dboard_iface::UNIT_RX]) << shift_by_unit(dboard_iface::UNIT_RX)) |
+            (boost::uint32_t(_gpio_out[dboard_iface::UNIT_TX]) << shift_by_unit(dboard_iface::UNIT_TX));
 
         const boost::uint32_t ctrl =
-            (boost::uint32_t(_pin_ctrl[dboard_iface::UNIT_RX]) << unit2shit(dboard_iface::UNIT_RX)) |
-            (boost::uint32_t(_pin_ctrl[dboard_iface::UNIT_TX]) << unit2shit(dboard_iface::UNIT_TX));
+            (boost::uint32_t(_pin_ctrl[dboard_iface::UNIT_RX]) << shift_by_unit(dboard_iface::UNIT_RX)) |
+            (boost::uint32_t(_pin_ctrl[dboard_iface::UNIT_TX]) << shift_by_unit(dboard_iface::UNIT_TX));
         const boost::uint32_t val = (ctrl & atr_val) | ((~ctrl) & gpio_val);
         if (not _update_cache.has_key(addr) or _update_cache[addr] != val)
         {
diff --git a/host/lib/usrp/cores/radio_ctrl_core_3000.cpp b/host/lib/usrp/cores/radio_ctrl_core_3000.cpp
index 27fac3471..2005bcf33 100644
--- a/host/lib/usrp/cores/radio_ctrl_core_3000.cpp
+++ b/host/lib/usrp/cores/radio_ctrl_core_3000.cpp
@@ -88,9 +88,6 @@ public:
         boost::mutex::scoped_lock lock(_mutex);
         UHD_LOGV(always) << _name << std::hex << " addr 0x" << addr << std::dec << std::endl;
         this->send_pkt(SR_READBACK, addr/8);
-        this->wait_for_ack(false);
-
-        this->send_pkt(0);
         const boost::uint64_t res = this->wait_for_ack(true);
         const boost::uint32_t lo = boost::uint32_t(res & 0xffffffff);
         const boost::uint32_t hi = boost::uint32_t(res >> 32);
@@ -103,9 +100,6 @@ public:
         UHD_LOGV(always) << _name << std::hex << " addr 0x" << addr << std::dec << std::endl;
 
         this->send_pkt(SR_READBACK, addr/8);
-        this->wait_for_ack(false);
-
-        this->send_pkt(0);
         return this->wait_for_ack(true);
     }
 
diff --git a/host/lib/usrp/cores/rx_dsp_core_3000.cpp b/host/lib/usrp/cores/rx_dsp_core_3000.cpp
index 525916032..67d0be017 100644
--- a/host/lib/usrp/cores/rx_dsp_core_3000.cpp
+++ b/host/lib/usrp/cores/rx_dsp_core_3000.cpp
@@ -32,6 +32,8 @@
 #define REG_DSP_RX_SCALE_IQ   _dsp_base + 4
 #define REG_DSP_RX_DECIM      _dsp_base + 8
 #define REG_DSP_RX_MUX        _dsp_base + 12
+#define REG_DSP_RX_COEFFS     _dsp_base + 16
+//FIXME: Add code to support REG_DSP_RX_COEFFS
 
 #define FLAG_DSP_RX_MUX_SWAP_IQ   (1 << 0)
 #define FLAG_DSP_RX_MUX_REAL_MODE (1 << 1)
@@ -88,6 +90,9 @@ public:
 
     uhd::meta_range_t get_host_rates(void){
         meta_range_t range;
+	for (int rate = 1024; rate > 512; rate -= 8){
+            range.push_back(range_t(_tick_rate/rate));
+        }
         for (int rate = 512; rate > 256; rate -= 4){
             range.push_back(range_t(_tick_rate/rate));
         }
@@ -105,7 +110,7 @@ public:
         size_t decim = decim_rate;
 
         //determine which half-band filters are activated
-        int hb0 = 0, hb1 = 0;
+        int hb0 = 0, hb1 = 0, hb2 = 0, hb_enable=0;
         if (decim % 2 == 0){
             hb0 = 1;
             decim /= 2;
@@ -114,14 +119,30 @@ public:
             hb1 = 1;
             decim /= 2;
         }
+        if (decim % 2 == 0){
+            hb2 = 1;
+            decim /= 2;
+        }
+
+	// Encode Halfband config for setting register programming.
+	if (hb2) { // Implies HB1 and HB0 also asserted
+	  hb_enable=3;
+	} else if (hb1) { // Implies HB0 is also asserted
+	  hb_enable=2;
+	} else if (hb0) {
+	  hb_enable=1;
+	} else {
+	  hb_enable=0;
+	}
 
-        _iface->poke32(REG_DSP_RX_DECIM, (hb1 << 9) | (hb0 << 8) | (decim & 0xff));
+        _iface->poke32(REG_DSP_RX_DECIM,  (hb_enable << 8) | (decim & 0xff));
 
-        if (decim > 1 and hb0 == 0 and hb1 == 0)
+        if (decim > 1 and hb0 == 0 and hb1 == 0 and hb2 == 0)
         {
             UHD_MSG(warning) << boost::format(
-                "The requested decimation is odd; the user should expect CIC rolloff.\n"
+                "The requested decimation is odd; the user should expect passband CIC rolloff.\n"
                 "Select an even decimation to ensure that a halfband filter is enabled.\n"
+		"Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.\n"
                 "decimation = dsp_rate/samp_rate -> %d = (%f MHz)/(%f MHz)\n"
             ) % decim_rate % (_tick_rate/1e6) % (rate/1e6);
         }
@@ -137,7 +158,7 @@ public:
 
     void update_scalar(void){
         const double factor = 1.0 + std::max(ceil_log2(_scaling_adjustment), 0.0);
-        const double target_scalar = (1 << 17)*_scaling_adjustment/_dsp_extra_scaling/factor;
+        const double target_scalar = (1 << 15)*_scaling_adjustment/_dsp_extra_scaling/factor;
         const boost::int32_t actual_scalar = boost::math::iround(target_scalar);
         _fxpt_scalar_correction = target_scalar/actual_scalar*factor; //should be small
         _iface->poke32(REG_DSP_RX_SCALE_IQ, actual_scalar);
diff --git a/host/lib/usrp/dboard/db_sbx_common.cpp b/host/lib/usrp/dboard/db_sbx_common.cpp
index 49e30949e..b67910e9a 100644
--- a/host/lib/usrp/dboard/db_sbx_common.cpp
+++ b/host/lib/usrp/dboard/db_sbx_common.cpp
@@ -33,6 +33,7 @@ UHD_STATIC_BLOCK(reg_sbx_dboards){
     dboard_manager::register_dboard(0x0054, 0x0055, &make_sbx, "SBX");
     dboard_manager::register_dboard(0x0065, 0x0064, &make_sbx, "SBX v4");
     dboard_manager::register_dboard(0x0067, 0x0066, &make_sbx, "CBX");
+    dboard_manager::register_dboard(0x0069, 0x0068, &make_sbx, "SBX v5");
     dboard_manager::register_dboard(0x0083, 0x0082, &make_sbx, "SBX-120");
     dboard_manager::register_dboard(0x0085, 0x0084, &make_sbx, "CBX-120");
 }
@@ -127,6 +128,10 @@ sbx_xcvr::sbx_xcvr(ctor_args_t args) : xcvr_dboard_base(args){
             db_actual = sbx_versionx_sptr(new cbx(this));
             freq_range = cbx_freq_range;
             break;
+        case 0x0069:
+            db_actual = sbx_versionx_sptr(new sbx_version4(this));
+            freq_range = sbx_freq_range;
+            break;
         case 0x0083:
             db_actual = sbx_versionx_sptr(new sbx_version4(this));
             freq_range = sbx_freq_range;
diff --git a/host/lib/usrp/dboard/db_tvrx2.cpp b/host/lib/usrp/dboard/db_tvrx2.cpp
index 0bfa5229a..c593c5437 100644
--- a/host/lib/usrp/dboard/db_tvrx2.cpp
+++ b/host/lib/usrp/dboard/db_tvrx2.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright 2010,2012 Ettus Research LLC
+// Copyright 2010,2012-2013 Ettus Research LLC
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -1005,6 +1005,17 @@ tvrx2::tvrx2(ctor_args_t args) : rx_dboard_base(args){
 
         _freq_scalar = (4*16.0e6)/(this->get_iface()->get_clock_rate(dboard_iface::UNIT_RX));
     } else if (ref_clock == 100e6) {
+        
+        this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, REFCLOCK_DIV8);
+
+        UHD_LOGV(often) << boost::format(
+            "TVRX2 (%s): Dividing Refclock by 6"
+        ) % (get_subdev_name()) << std::endl;
+
+        _freq_scalar = (6*16.0e6)/this->get_iface()->get_clock_rate(dboard_iface::UNIT_RX);
+    } else if (ref_clock == 200e6)  {
+        UHD_MSG(warning) << boost::format("ref_clock was 200e6, setting ref_clock divider for 100e6.") % ref_clock << std::endl;
+        this->get_iface()->set_clock_rate(dboard_iface::UNIT_RX, 100e6);
         this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, REFCLOCK_DIV6);
 
         UHD_LOGV(often) << boost::format(
@@ -1014,7 +1025,7 @@ tvrx2::tvrx2(ctor_args_t args) : rx_dboard_base(args){
         _freq_scalar = (6*16.0e6)/this->get_iface()->get_clock_rate(dboard_iface::UNIT_RX);
     } else {
         this->get_iface()->set_gpio_out(dboard_iface::UNIT_RX, REFCLOCK_DIV6);
-        UHD_MSG(warning) << boost::format("Unsupported ref_clock %0.2f, valid options 64e6 and 100e6") % ref_clock << std::endl;
+        UHD_MSG(warning) << boost::format("Unsupported ref_clock %0.2f, valid options 64e6, 100e6, 200e6") % ref_clock << std::endl;
         _freq_scalar = 1.0;
     }
 
diff --git a/host/lib/usrp/e100/e100_impl.cpp b/host/lib/usrp/e100/e100_impl.cpp
index 619ea8f8e..b49ba64a2 100644
--- a/host/lib/usrp/e100/e100_impl.cpp
+++ b/host/lib/usrp/e100/e100_impl.cpp
@@ -51,6 +51,10 @@ static device_addrs_t e100_find(const device_addr_t &hint){
     //return an empty list of addresses when type is set to non-usrp-e
     if (hint.has_key("type") and hint["type"] != "e100") return e100_addrs;
 
+    //Return an empty list of addresses when a resource is specified,
+    //since a resource is intended for a different, non-USB, device.
+    if (hint.has_key("resource")) return e100_addrs;
+
     //device node not provided, assume its 0
     if (not hint.has_key("node")){
         device_addr_t new_addr = hint;
diff --git a/host/lib/usrp/e100/e100_impl.hpp b/host/lib/usrp/e100/e100_impl.hpp
index 813f9cc8f..d499c4c03 100644
--- a/host/lib/usrp/e100/e100_impl.hpp
+++ b/host/lib/usrp/e100/e100_impl.hpp
@@ -85,8 +85,6 @@ public:
     bool recv_async_msg(uhd::async_metadata_t &, double);
 
 private:
-    uhd::property_tree::sptr _tree;
-
     //controllers
     fifo_ctrl_excelsior::sptr _fifo_ctrl;
     i2c_core_200::sptr _fpga_i2c_ctrl;
@@ -111,11 +109,6 @@ private:
     uhd::usrp::dboard_manager::sptr _dboard_manager;
     uhd::usrp::dboard_iface::sptr _dboard_iface;
 
-    //device properties interface
-    uhd::property_tree::sptr get_tree(void) const{
-        return _tree;
-    }
-
     std::vector<boost::weak_ptr<uhd::rx_streamer> > _rx_streamers;
     std::vector<boost::weak_ptr<uhd::tx_streamer> > _tx_streamers;
 
diff --git a/host/lib/usrp/gps_ctrl.cpp b/host/lib/usrp/gps_ctrl.cpp
index 98bc90a3f..4bf8eb3a3 100644
--- a/host/lib/usrp/gps_ctrl.cpp
+++ b/host/lib/usrp/gps_ctrl.cpp
@@ -38,7 +38,7 @@ using namespace boost::algorithm;
 using namespace boost::this_thread;
 
 /*!
- * A GPS control for NMEA compatible GPSes
+ * A control for GPSDO devices
  */
 
 class gps_ctrl_impl : public gps_ctrl{
@@ -63,7 +63,7 @@ private:
   }
 
   std::string update_cached_sensors(const std::string sensor) {
-    if(not gps_detected() || (gps_type != GPS_TYPE_ER_GPSDO)) {
+    if(not gps_detected() || (gps_type != GPS_TYPE_INTERNAL_GPSDO)) {
         UHD_MSG(error) << "get_stat(): unsupported GPS or no GPS detected";
         return std::string();
     }
@@ -105,18 +105,19 @@ public:
     bool i_heard_some_nmea = false, i_heard_something_weird = false;
     gps_type = GPS_TYPE_NONE;
 
+    //first we look for an internal GPSDO
     _flush(); //get whatever junk is in the rx buffer right now, and throw it away
     _send("HAAAY GUYYYYS\n"); //to elicit a response from the GPSDO
 
     //wait for _send(...) to return
-    sleep(milliseconds(200));
+    sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
 
     //then we loop until we either timeout, or until we get a response that indicates we're a JL device
     const boost::system_time comm_timeout = boost::get_system_time() + milliseconds(GPS_COMM_TIMEOUT_MS);
     while(boost::get_system_time() < comm_timeout) {
       reply = _recv();
       if(reply.find("Command Error") != std::string::npos) {
-        gps_type = GPS_TYPE_ER_GPSDO;
+        gps_type = GPS_TYPE_INTERNAL_GPSDO;
         break;
       }
       else if(reply.substr(0, 3) == "$GP") i_heard_some_nmea = true; //but keep looking for that "Command Error" response
@@ -124,24 +125,25 @@ public:
       sleep(milliseconds(GPS_TIMEOUT_DELAY_MS));
     }
 
-    if((i_heard_some_nmea) && (gps_type != GPS_TYPE_ER_GPSDO)) gps_type = GPS_TYPE_GENERIC_NMEA;
+    if((i_heard_some_nmea) && (gps_type != GPS_TYPE_INTERNAL_GPSDO)) gps_type = GPS_TYPE_GENERIC_NMEA;
 
     if((gps_type == GPS_TYPE_NONE) && i_heard_something_weird) {
       UHD_MSG(error) << "GPS invalid reply \"" << reply << "\", assuming none available" << std::endl;
     }
 
     switch(gps_type) {
-    case GPS_TYPE_ER_GPSDO:
-      UHD_MSG(status) << "Found an Ettus Research NMEA-capable GPSDO" << std::endl;
+    case GPS_TYPE_INTERNAL_GPSDO:
+      UHD_MSG(status) << "Found an internal GPSDO" << std::endl;
       init_gpsdo();
       break;
 
     case GPS_TYPE_GENERIC_NMEA:
-      if(gps_type == GPS_TYPE_GENERIC_NMEA) UHD_MSG(status) << "Found a generic NMEA GPS device" << std::endl;
+      UHD_MSG(status) << "Found a generic NMEA GPS device" << std::endl;
       break;
 
     case GPS_TYPE_NONE:
     default:
+      UHD_MSG(status) << "No GPSDO found" << std::endl;
       break;
 
     }
@@ -189,19 +191,19 @@ private:
     //issue some setup stuff so it spits out the appropriate data
     //none of these should issue replies so we don't bother looking for them
     //we have to sleep between commands because the JL device, despite not acking, takes considerable time to process each command.
-     sleep(milliseconds(200));
+     sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
     _send("SYST:COMM:SER:ECHO OFF\n");
-     sleep(milliseconds(200));
+     sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
     _send("SYST:COMM:SER:PRO OFF\n");
-     sleep(milliseconds(200));
+     sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
     _send("GPS:GPGGA 1\n");
-     sleep(milliseconds(200));
+     sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
     _send("GPS:GGAST 0\n");
-     sleep(milliseconds(200));
+     sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
     _send("GPS:GPRMC 1\n");
-     sleep(milliseconds(200));
+     sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
     _send("SERV:TRAC 0\n");
-     sleep(milliseconds(200));
+     sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
   }
 
   //retrieve a raw NMEA sentence
@@ -304,7 +306,7 @@ private:
 
     //enable servo reporting
     _send("SERV:TRAC 1\n");
-    sleep(milliseconds(200));
+    sleep(milliseconds(GPSDO_STUPID_DELAY_MS));
 
     std::string reply;
 
@@ -339,7 +341,7 @@ private:
   }
 
   enum {
-    GPS_TYPE_ER_GPSDO,
+    GPS_TYPE_INTERNAL_GPSDO,
     GPS_TYPE_GENERIC_NMEA,
     GPS_TYPE_NONE
   } gps_type;
@@ -351,6 +353,7 @@ private:
   static const int GPS_SERVO_FRESHNESS = 2500;
   static const int GPS_LOCK_FRESHNESS = 2500;
   static const int GPS_TIMEOUT_DELAY_MS = 200;
+  static const int GPSDO_STUPID_DELAY_MS = 200;
 };
 
 /***********************************************************************
diff --git a/host/lib/usrp/mboard_eeprom.cpp b/host/lib/usrp/mboard_eeprom.cpp
index dc25379f9..68c084589 100644
--- a/host/lib/usrp/mboard_eeprom.cpp
+++ b/host/lib/usrp/mboard_eeprom.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright 2010-2012 Ettus Research LLC
+// Copyright 2010-2013 Ettus Research LLC
 //
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by
@@ -229,6 +229,137 @@ static void store_n100(const mboard_eeprom_t &mb_eeprom, i2c_iface &iface){
 }
 
 /***********************************************************************
+ * Implementation of X300 load/store
+ **********************************************************************/
+static const boost::uint8_t X300_EEPROM_ADDR = 0x50;
+
+struct x300_eeprom_map
+{
+    //indentifying numbers
+    unsigned char revision[2];
+    unsigned char product[2];
+    boost::uint8_t _pad0[4];
+
+    //all the mac addrs
+    boost::uint8_t mac_addr0[6];
+    boost::uint8_t _pad1[2];
+    boost::uint8_t mac_addr1[6];
+    boost::uint8_t _pad2[2];
+
+    //all the IP addrs
+    boost::uint32_t gateway;
+    boost::uint32_t subnet[4];
+    boost::uint32_t ip_addr[4];
+    boost::uint8_t _pad3[16];
+
+    //names and serials
+    unsigned char name[NAME_MAX_LEN];
+    unsigned char serial[SERIAL_LEN];
+};
+
+static void load_x300(mboard_eeprom_t &mb_eeprom, i2c_iface &iface)
+{
+    //extract the revision number
+    mb_eeprom["revision"] = uint16_bytes_to_string(
+        iface.read_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, revision), 2)
+    );
+
+    //extract the product code
+    mb_eeprom["product"] = uint16_bytes_to_string(
+        iface.read_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, product), 2)
+    );
+
+    //extract the mac addresses
+    mb_eeprom["mac-addr0"] = mac_addr_t::from_bytes(iface.read_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, mac_addr0), 6
+    )).to_string();
+    mb_eeprom["mac-addr1"] = mac_addr_t::from_bytes(iface.read_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, mac_addr1), 6
+    )).to_string();
+
+    //extract the ip addresses
+    boost::asio::ip::address_v4::bytes_type ip_addr_bytes;
+    byte_copy(iface.read_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, gateway), 4), ip_addr_bytes);
+    mb_eeprom["gateway"] = boost::asio::ip::address_v4(ip_addr_bytes).to_string();
+    for (size_t i = 0; i < 4; i++)
+    {
+        const std::string n(1, i+'0');
+        byte_copy(iface.read_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, ip_addr)+(i*4), 4), ip_addr_bytes);
+        mb_eeprom["ip-addr"+n] = boost::asio::ip::address_v4(ip_addr_bytes).to_string();
+
+        byte_copy(iface.read_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, subnet)+(i*4), 4), ip_addr_bytes);
+        mb_eeprom["subnet"+n] = boost::asio::ip::address_v4(ip_addr_bytes).to_string();
+    }
+
+    //extract the serial
+    mb_eeprom["serial"] = bytes_to_string(iface.read_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, serial), SERIAL_LEN
+    ));
+
+    //extract the name
+    mb_eeprom["name"] = bytes_to_string(iface.read_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, name), NAME_MAX_LEN
+    ));
+}
+
+static void store_x300(const mboard_eeprom_t &mb_eeprom, i2c_iface &iface)
+{
+    //parse the revision number
+    if (mb_eeprom.has_key("revision")) iface.write_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, revision),
+        string_to_uint16_bytes(mb_eeprom["revision"])
+    );
+
+    //parse the product code
+    if (mb_eeprom.has_key("product")) iface.write_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, product),
+        string_to_uint16_bytes(mb_eeprom["product"])
+    );
+
+    //store the mac addresses
+    if (mb_eeprom.has_key("mac-addr0")) iface.write_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, mac_addr0),
+        mac_addr_t::from_string(mb_eeprom["mac-addr0"]).to_bytes()
+    );
+    if (mb_eeprom.has_key("mac-addr1")) iface.write_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, mac_addr1),
+        mac_addr_t::from_string(mb_eeprom["mac-addr1"]).to_bytes()
+    );
+
+    //store the ip addresses
+    byte_vector_t ip_addr_bytes(4);
+    if (mb_eeprom.has_key("gateway")){
+        byte_copy(boost::asio::ip::address_v4::from_string(mb_eeprom["gateway"]).to_bytes(), ip_addr_bytes);
+        iface.write_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, gateway), ip_addr_bytes);
+    }
+    for (size_t i = 0; i < 4; i++)
+    {
+        const std::string n(1, i+'0');
+        if (mb_eeprom.has_key("ip-addr"+n)){
+            byte_copy(boost::asio::ip::address_v4::from_string(mb_eeprom["ip-addr"+n]).to_bytes(), ip_addr_bytes);
+            iface.write_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, ip_addr)+(i*4), ip_addr_bytes);
+        }
+
+        if (mb_eeprom.has_key("subnet"+n)){
+            byte_copy(boost::asio::ip::address_v4::from_string(mb_eeprom["subnet"+n]).to_bytes(), ip_addr_bytes);
+            iface.write_eeprom(X300_EEPROM_ADDR, offsetof(x300_eeprom_map, subnet)+(i*4), ip_addr_bytes);
+        }
+    }
+
+    //store the serial
+    if (mb_eeprom.has_key("serial")) iface.write_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, serial),
+        string_to_bytes(mb_eeprom["serial"], SERIAL_LEN)
+    );
+
+    //store the name
+    if (mb_eeprom.has_key("name")) iface.write_eeprom(
+        X300_EEPROM_ADDR, offsetof(x300_eeprom_map, name),
+        string_to_bytes(mb_eeprom["name"], NAME_MAX_LEN)
+    );
+}
+
+/***********************************************************************
  * Implementation of B000 load/store
  **********************************************************************/
 static const boost::uint8_t B000_EEPROM_ADDR = 0x50;
@@ -512,6 +643,7 @@ mboard_eeprom_t::mboard_eeprom_t(void){
 
 mboard_eeprom_t::mboard_eeprom_t(i2c_iface &iface, const std::string &which){
     if (which == "N100") load_n100(*this, iface);
+    if (which == "X300") load_x300(*this, iface);
     if (which == "B000") load_b000(*this, iface);
     if (which == "B100") load_b100(*this, iface);
     if (which == "B200") load_b200(*this, iface);
@@ -520,6 +652,7 @@ mboard_eeprom_t::mboard_eeprom_t(i2c_iface &iface, const std::string &which){
 
 void mboard_eeprom_t::commit(i2c_iface &iface, const std::string &which) const{
     if (which == "N100") store_n100(*this, iface);
+    if (which == "X300") store_x300(*this, iface);
     if (which == "B000") store_b000(*this, iface);
     if (which == "B100") store_b100(*this, iface);
     if (which == "B200") store_b200(*this, iface);
diff --git a/host/lib/usrp/multi_usrp.cpp b/host/lib/usrp/multi_usrp.cpp
index 4bd7d1bfe..182e774fc 100644
--- a/host/lib/usrp/multi_usrp.cpp
+++ b/host/lib/usrp/multi_usrp.cpp
@@ -517,6 +517,46 @@ public:
         return _tree->access<std::vector<std::string> >(mb_root(mboard) / "clock_source" / "options").get();
     }
 
+    void set_clock_source_out(const bool enb, const size_t mboard)
+    {
+        if (mboard != ALL_MBOARDS)
+        {
+            if (_tree->exists(mb_root(mboard) / "clock_source" / "output"))
+            {
+                _tree->access<bool>(mb_root(mboard) / "clock_source" / "output").set(enb);
+            }
+            else
+            {
+                throw uhd::runtime_error("multi_usrp::set_clock_source_out - not supported on this device");
+            }
+            return;
+        }
+        for (size_t m = 0; m < get_num_mboards(); m++)
+        {
+            this->set_clock_source_out(enb, m);
+        }
+    }
+
+    void set_time_source_out(const bool enb, const size_t mboard)
+    {
+        if (mboard != ALL_MBOARDS)
+        {
+            if (_tree->exists(mb_root(mboard) / "time_source" / "output"))
+            {
+                _tree->access<bool>(mb_root(mboard) / "time_source" / "output").set(enb);
+            }
+            else
+            {
+                throw uhd::runtime_error("multi_usrp::set_time_source_out - not supported on this device");
+            }
+            return;
+        }
+        for (size_t m = 0; m < get_num_mboards(); m++)
+        {
+            this->set_time_source_out(enb, m);
+        }
+    }
+
     size_t get_num_mboards(void){
         return _tree->list("/mboards").size();
     }
@@ -910,6 +950,74 @@ public:
         }
     }
 
+    /*******************************************************************
+     * GPIO methods
+     ******************************************************************/
+    std::vector<std::string> get_gpio_banks(const size_t mboard)
+    {
+        std::vector<std::string> banks;
+        if (_tree->exists(mb_root(mboard) / "gpio"))
+        {
+            BOOST_FOREACH(const std::string &name, _tree->list(mb_root(mboard) / "gpio"))
+            {
+                banks.push_back(name);
+            }
+        }
+        BOOST_FOREACH(const std::string &name, _tree->list(mb_root(mboard) / "dboards"))
+        {
+            banks.push_back("RX"+name);
+            banks.push_back("TX"+name);
+        }
+        return banks;
+    }
+
+    void set_gpio_attr(const std::string &bank, const std::string &attr, const boost::uint32_t value, const boost::uint32_t mask, const size_t mboard)
+    {
+        if (_tree->exists(mb_root(mboard) / "gpio" / bank))
+        {
+            const boost::uint32_t current = _tree->access<boost::uint32_t>(mb_root(mboard) / "gpio" / bank / attr).get();
+            const boost::uint32_t new_value = (current & ~mask) | (value & mask);
+            _tree->access<boost::uint32_t>(mb_root(mboard) / "gpio" / bank / attr).set(new_value);
+            return;
+        }
+        if (bank.size() > 2 and bank[1] == 'X')
+        {
+            const std::string name = bank.substr(2);
+            const dboard_iface::unit_t unit = (bank[0] == 'R')? dboard_iface::UNIT_RX : dboard_iface::UNIT_TX;
+            dboard_iface::sptr iface = _tree->access<dboard_iface::sptr>(mb_root(mboard) / "dboards" / name / "iface").get();
+            if (attr == "CTRL") iface->set_pin_ctrl(unit, boost::uint16_t(value), boost::uint16_t(mask));
+            if (attr == "DDR") iface->set_gpio_ddr(unit, boost::uint16_t(value), boost::uint16_t(mask));
+            if (attr == "OUT") iface->set_gpio_out(unit, boost::uint16_t(value), boost::uint16_t(mask));
+            if (attr == "ATR_0X") iface->set_atr_reg(unit, dboard_iface::ATR_REG_IDLE, boost::uint16_t(value), boost::uint16_t(mask));
+            if (attr == "ATR_RX") iface->set_atr_reg(unit, dboard_iface::ATR_REG_RX_ONLY, boost::uint16_t(value), boost::uint16_t(mask));
+            if (attr == "ATR_TX") iface->set_atr_reg(unit, dboard_iface::ATR_REG_TX_ONLY, boost::uint16_t(value), boost::uint16_t(mask));
+            if (attr == "ATR_XX") iface->set_atr_reg(unit, dboard_iface::ATR_REG_FULL_DUPLEX, boost::uint16_t(value), boost::uint16_t(mask));
+        }
+    }
+
+    boost::uint32_t get_gpio_attr(const std::string &bank, const std::string &attr, const size_t mboard)
+    {
+        if (_tree->exists(mb_root(mboard) / "gpio" / bank))
+        {
+            return _tree->access<boost::uint64_t>(mb_root(mboard) / "gpio" / bank / attr).get();
+        }
+        if (bank.size() > 2 and bank[1] == 'X')
+        {
+            const std::string name = bank.substr(2);
+            const dboard_iface::unit_t unit = (bank[0] == 'R')? dboard_iface::UNIT_RX : dboard_iface::UNIT_TX;
+            dboard_iface::sptr iface = _tree->access<dboard_iface::sptr>(mb_root(mboard) / "dboards" / name / "iface").get();
+            if (attr == "CTRL") return iface->get_pin_ctrl(unit);
+            if (attr == "DDR") return iface->get_gpio_ddr(unit);
+            if (attr == "OUT") return iface->get_gpio_out(unit);
+            if (attr == "ATR_0X") return iface->get_atr_reg(unit, dboard_iface::ATR_REG_IDLE);
+            if (attr == "ATR_RX") return iface->get_atr_reg(unit, dboard_iface::ATR_REG_RX_ONLY);
+            if (attr == "ATR_TX") return iface->get_atr_reg(unit, dboard_iface::ATR_REG_TX_ONLY);
+            if (attr == "ATR_XX") return iface->get_atr_reg(unit, dboard_iface::ATR_REG_FULL_DUPLEX);
+            if (attr == "READBACK") return iface->read_gpio(unit);
+        }
+        return 0;
+    }
+
 private:
     device::sptr _dev;
     property_tree::sptr _tree;
diff --git a/host/lib/usrp/usrp1/usrp1_impl.cpp b/host/lib/usrp/usrp1/usrp1_impl.cpp
index 625926f36..3b902b343 100644
--- a/host/lib/usrp/usrp1/usrp1_impl.cpp
+++ b/host/lib/usrp/usrp1/usrp1_impl.cpp
@@ -55,9 +55,9 @@ static device_addrs_t usrp1_find(const device_addr_t &hint)
     //return an empty list of addresses when type is set to non-usrp1
     if (hint.has_key("type") and hint["type"] != "usrp1") return usrp1_addrs;
 
-    //Return an empty list of addresses when an address is specified,
-    //since an address is intended for a different, non-USB, device.
-    if (hint.has_key("addr")) return usrp1_addrs;
+    //Return an empty list of addresses when an address or resource is specified,
+    //since an address and resource is intended for a different, non-USB, device.
+    if (hint.has_key("addr") || hint.has_key("resource")) return usrp1_addrs;
 
     unsigned int vid, pid;
 
diff --git a/host/lib/usrp/usrp1/usrp1_impl.hpp b/host/lib/usrp/usrp1/usrp1_impl.hpp
index 0be8ebca9..da9fe8b16 100644
--- a/host/lib/usrp/usrp1/usrp1_impl.hpp
+++ b/host/lib/usrp/usrp1/usrp1_impl.hpp
@@ -84,13 +84,6 @@ public:
     bool recv_async_msg(uhd::async_metadata_t &, double);
 
 private:
-    uhd::property_tree::sptr _tree;
-
-    //device properties interface
-    uhd::property_tree::sptr get_tree(void) const{
-        return _tree;
-    }
-
     //controllers
     uhd::usrp::fx2_ctrl::sptr _fx2_ctrl;
     usrp1_iface::sptr _iface;
diff --git a/host/lib/usrp/usrp2/usrp2_iface.cpp b/host/lib/usrp/usrp2/usrp2_iface.cpp
index 5f97045e1..7297a30d1 100644
--- a/host/lib/usrp/usrp2/usrp2_iface.cpp
+++ b/host/lib/usrp/usrp2/usrp2_iface.cpp
@@ -36,6 +36,7 @@
 #include <boost/filesystem.hpp>
 #include <algorithm>
 #include <iostream>
+#include <uhd/utils/platform.hpp>
 
 using namespace uhd;
 using namespace uhd::usrp;
@@ -62,33 +63,6 @@ static const boost::uint32_t MIN_PROTO_COMPAT_I2C = 7;
 static const boost::uint32_t MIN_PROTO_COMPAT_REG = 10;
 static const boost::uint32_t MIN_PROTO_COMPAT_UART = 7;
 
-//Define get_gpid() to get a globally unique identifier for this process.
-//The gpid is implemented as a hash of the pid and a unique machine identifier.
-#ifdef UHD_PLATFORM_WIN32
-#include <Windows.h>
-static inline size_t get_gpid(void){
-    //extract volume serial number
-    char szVolName[MAX_PATH+1], szFileSysName[MAX_PATH+1];
-    DWORD dwSerialNumber, dwMaxComponentLen, dwFileSysFlags;
-    GetVolumeInformation("C:\\", szVolName, MAX_PATH,
-        &dwSerialNumber, &dwMaxComponentLen,
-        &dwFileSysFlags, szFileSysName, sizeof(szFileSysName));
-
-    size_t hash = 0;
-    boost::hash_combine(hash, GetCurrentProcessId());
-    boost::hash_combine(hash, dwSerialNumber);
-    return hash;
-}
-#else
-#include <unistd.h>
-static inline size_t get_gpid(void){
-    size_t hash = 0;
-    boost::hash_combine(hash, getpid());
-    boost::hash_combine(hash, gethostid());
-    return hash;
-}
-#endif
-
 class usrp2_iface_impl : public usrp2_iface{
 public:
 /***********************************************************************
@@ -122,7 +96,7 @@ public:
 
     void lock_device(bool lock){
         if (lock){
-            this->pokefw(U2_FW_REG_LOCK_GPID, boost::uint32_t(get_gpid()));
+            this->pokefw(U2_FW_REG_LOCK_GPID, get_process_hash());
             _lock_task = task::make(boost::bind(&usrp2_iface_impl::lock_task, this));
         }
         else{
@@ -147,7 +121,7 @@ public:
         if (time_diff >= lock_timeout_time) return false;
 
         //otherwise only lock if the device hash is different that ours
-        return lock_gpid != boost::uint32_t(get_gpid());
+        return lock_gpid != get_process_hash();
     }
 
     void lock_task(void){
diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp
index 3afb3aac7..16d9b9a54 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.cpp
@@ -41,6 +41,9 @@ using namespace uhd::usrp;
 using namespace uhd::transport;
 namespace asio = boost::asio;
 
+//A reasonable number of frames for send/recv and async/sync
+static const size_t DEFAULT_NUM_FRAMES = 32;
+
 /***********************************************************************
  * Discovery over the udp transport
  **********************************************************************/
@@ -49,13 +52,16 @@ static device_addrs_t usrp2_find(const device_addr_t &hint_){
     device_addrs_t hints = separate_device_addr(hint_);
     if (hints.size() > 1){
         device_addrs_t found_devices;
+        std::string error_msg;
         BOOST_FOREACH(const device_addr_t &hint_i, hints){
             device_addrs_t found_devices_i = usrp2_find(hint_i);
-            if (found_devices_i.size() != 1) throw uhd::value_error(str(boost::format(
+            if (found_devices_i.size() != 1) error_msg += str(boost::format(
                 "Could not resolve device hint \"%s\" to a single device."
-            ) % hint_i.to_string()));
-            found_devices.push_back(found_devices_i[0]);
+            ) % hint_i.to_string());
+            else found_devices.push_back(found_devices_i[0]);
         }
+        if (found_devices.empty()) return device_addrs_t();
+        if (not error_msg.empty()) throw uhd::value_error(error_msg);
         return device_addrs_t(1, combine_device_addrs(found_devices));
     }
 
@@ -68,6 +74,10 @@ static device_addrs_t usrp2_find(const device_addr_t &hint_){
     //return an empty list of addresses when type is set to non-usrp2
     if (hint.has_key("type") and hint["type"] != "usrp2") return usrp2_addrs;
 
+    //Return an empty list of addresses when a resource is specified,
+    //since a resource is intended for a different, non-USB, device.
+    if (hint.has_key("resource")) return usrp2_addrs;
+
     //if no address was specified, send a broadcast on each interface
     if (not hint.has_key("addr")){
         BOOST_FOREACH(const if_addrs_t &if_addrs, get_if_addrs()){
@@ -278,8 +288,15 @@ static zero_copy_if::sptr make_xport(
         filtered_hints[key] = hints[key];
     }
 
+    zero_copy_xport_params default_buff_args;
+    default_buff_args.send_frame_size = transport::udp_simple::mtu;
+    default_buff_args.recv_frame_size = transport::udp_simple::mtu;
+    default_buff_args.num_send_frames = DEFAULT_NUM_FRAMES;
+    default_buff_args.num_recv_frames = DEFAULT_NUM_FRAMES;
+
     //make the transport object with the filtered hints
-    zero_copy_if::sptr xport = udp_zero_copy::make(addr, port, filtered_hints);
+    udp_zero_copy::buff_params ignored_params;
+    zero_copy_if::sptr xport = udp_zero_copy::make(addr, port, default_buff_args, ignored_params, filtered_hints);
 
     //Send a small data packet so the usrp2 knows the udp source port.
     //This setup must happen before further initialization occurs
diff --git a/host/lib/usrp/usrp2/usrp2_impl.hpp b/host/lib/usrp/usrp2/usrp2_impl.hpp
index f9988287f..d7b53e56b 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.hpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.hpp
@@ -79,7 +79,6 @@ public:
     bool recv_async_msg(uhd::async_metadata_t &, double);
 
 private:
-    uhd::property_tree::sptr _tree;
     struct mb_container_type{
         usrp2_iface::sptr iface;
         usrp2_fifo_ctrl::sptr fifo_ctrl;
@@ -115,11 +114,6 @@ private:
     void set_rx_fe_corrections(const std::string &mb, const double);
     void set_tx_fe_corrections(const std::string &mb, const double);
 
-    //device properties interface
-    uhd::property_tree::sptr get_tree(void) const{
-        return _tree;
-    }
-
     //io impl methods and members
     UHD_PIMPL_DECL(io_impl) _io_impl;
     void io_init(void);
diff --git a/host/lib/usrp/x300/CMakeLists.txt b/host/lib/usrp/x300/CMakeLists.txt
new file mode 100644
index 000000000..a588f901b
--- /dev/null
+++ b/host/lib/usrp/x300/CMakeLists.txt
@@ -0,0 +1,38 @@
+#
+# Copyright 2013 Ettus Research LLC
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+########################################################################
+# This file included, use CMake directory variables
+########################################################################
+
+########################################################################
+# Conditionally configure the X300 support
+########################################################################
+LIBUHD_REGISTER_COMPONENT("X300" ENABLE_X300 ON "ENABLE_LIBUHD" OFF)
+
+IF(ENABLE_X300)
+    LIBUHD_APPEND_SOURCES(
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_impl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_fw_ctrl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_fw_uart.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_adc_ctrl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_dac_ctrl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_io_impl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_dboard_iface.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/x300_clock_ctrl.cpp
+    )
+ENDIF(ENABLE_X300)
diff --git a/host/lib/usrp/x300/x300_adc_ctrl.cpp b/host/lib/usrp/x300/x300_adc_ctrl.cpp
new file mode 100644
index 000000000..75bfb048c
--- /dev/null
+++ b/host/lib/usrp/x300/x300_adc_ctrl.cpp
@@ -0,0 +1,133 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "x300_adc_ctrl.hpp"
+#include "ads62p48_regs.hpp"
+#include <uhd/types/ranges.hpp>
+#include <uhd/utils/log.hpp>
+#include <uhd/utils/safe_call.hpp>
+#include <uhd/exception.hpp>
+#include <boost/foreach.hpp>
+
+using namespace uhd;
+
+/*!
+ * A X300 codec control specific to the ads62p48 ic.
+ */
+class x300_adc_ctrl_impl : public x300_adc_ctrl
+{
+public:
+    x300_adc_ctrl_impl(uhd::spi_iface::sptr iface, const size_t slaveno):
+        _iface(iface), _slaveno(slaveno)
+    {
+        //power-up adc
+       _ads62p48_regs.reset = 1;
+        this->send_ads62p48_reg(0x00); //issue a reset to the ADC
+       _ads62p48_regs.reset = 0;
+
+        _ads62p48_regs.enable_low_speed_mode = 0;
+        _ads62p48_regs.ref = ads62p48_regs_t::REF_INTERNAL;
+        _ads62p48_regs.standby = ads62p48_regs_t::STANDBY_NORMAL;
+        _ads62p48_regs.power_down = ads62p48_regs_t::POWER_DOWN_NORMAL;
+        _ads62p48_regs.lvds_cmos = ads62p48_regs_t::LVDS_CMOS_DDR_LVDS;
+        _ads62p48_regs.channel_control = ads62p48_regs_t::CHANNEL_CONTROL_INDEPENDENT;
+        _ads62p48_regs.data_format = ads62p48_regs_t::DATA_FORMAT_2S_COMPLIMENT;
+	_ads62p48_regs.clk_out_pos_edge = ads62p48_regs_t::CLK_OUT_POS_EDGE_MINUS7_26;
+	_ads62p48_regs.clk_out_neg_edge = ads62p48_regs_t::CLK_OUT_NEG_EDGE_MINUS7_26;
+
+
+        this->send_ads62p48_reg(0);
+        this->send_ads62p48_reg(0x20);
+        this->send_ads62p48_reg(0x3f);
+        this->send_ads62p48_reg(0x40);
+        this->send_ads62p48_reg(0x41);
+        this->send_ads62p48_reg(0x44);
+        this->send_ads62p48_reg(0x50);
+        this->send_ads62p48_reg(0x51);
+        this->send_ads62p48_reg(0x52);
+        this->send_ads62p48_reg(0x53);
+        this->send_ads62p48_reg(0x55);
+        this->send_ads62p48_reg(0x57);
+        this->send_ads62p48_reg(0x62);
+        this->send_ads62p48_reg(0x63);
+        this->send_ads62p48_reg(0x66);
+        this->send_ads62p48_reg(0x68);
+        this->send_ads62p48_reg(0x6a);
+        this->send_ads62p48_reg(0x75);
+        this->send_ads62p48_reg(0x76);
+
+    }
+
+    double set_gain(const double &gain)
+    {
+        const meta_range_t gain_range = meta_range_t(0, 6.0, 0.5);
+        const int gain_bits = int((gain_range.clip(gain)*2.0) + 0.5);
+        _ads62p48_regs.gain_chA = gain_bits;
+        _ads62p48_regs.gain_chB = gain_bits;
+        this->send_ads62p48_reg(0x55);
+        this->send_ads62p48_reg(0x68);
+        return gain_bits/2;
+    }
+
+    void set_test_word(const std::string &patterna, const std::string &patternb, const boost::uint32_t num)
+    {
+        _ads62p48_regs.custom_pattern_low = num & 0xff;
+        _ads62p48_regs.custom_pattern_high = num >> 8;
+        if (patterna == "ones") _ads62p48_regs.test_patterns_chA = ads62p48_regs_t::TEST_PATTERNS_CHA_ONES;
+        if (patterna == "zeros") _ads62p48_regs.test_patterns_chA = ads62p48_regs_t::TEST_PATTERNS_CHA_ZEROS;
+        if (patterna == "custom") _ads62p48_regs.test_patterns_chA = ads62p48_regs_t::TEST_PATTERNS_CHA_CUSTOM;
+        if (patterna == "ramp") _ads62p48_regs.test_patterns_chA = ads62p48_regs_t::TEST_PATTERNS_CHA_RAMP;
+        if (patterna == "normal") _ads62p48_regs.test_patterns_chA = ads62p48_regs_t::TEST_PATTERNS_CHA_NORMAL;
+        if (patternb == "ones") _ads62p48_regs.test_patterns_chB = ads62p48_regs_t::TEST_PATTERNS_CHB_ONES;
+        if (patternb == "zeros") _ads62p48_regs.test_patterns_chB = ads62p48_regs_t::TEST_PATTERNS_CHB_ZEROS;
+        if (patternb == "custom") _ads62p48_regs.test_patterns_chB = ads62p48_regs_t::TEST_PATTERNS_CHB_CUSTOM;
+        if (patterna == "ramp") _ads62p48_regs.test_patterns_chB = ads62p48_regs_t::TEST_PATTERNS_CHB_RAMP;
+        if (patterna == "normal") _ads62p48_regs.test_patterns_chB = ads62p48_regs_t::TEST_PATTERNS_CHB_NORMAL;
+        this->send_ads62p48_reg(0x51);
+        this->send_ads62p48_reg(0x52);
+        this->send_ads62p48_reg(0x62);
+        this->send_ads62p48_reg(0x75);
+    }
+
+    ~x300_adc_ctrl_impl(void)
+    {
+        _ads62p48_regs.power_down = ads62p48_regs_t::POWER_DOWN_GLOBAL;
+        UHD_SAFE_CALL
+        (
+            this->send_ads62p48_reg(0x40);
+        )
+    }
+
+private:
+    ads62p48_regs_t _ads62p48_regs;
+    uhd::spi_iface::sptr _iface;
+    const size_t _slaveno;
+
+    void send_ads62p48_reg(boost::uint8_t addr)
+    {
+        boost::uint16_t reg = _ads62p48_regs.get_write_reg(addr);
+        _iface->write_spi(_slaveno, spi_config_t::EDGE_FALL, reg, 16);
+    }
+};
+
+/***********************************************************************
+ * Public make function for the ADC control
+ **********************************************************************/
+x300_adc_ctrl::sptr x300_adc_ctrl::make(uhd::spi_iface::sptr iface, const size_t slaveno)
+{
+    return sptr(new x300_adc_ctrl_impl(iface, slaveno));
+}
diff --git a/host/lib/usrp/x300/x300_adc_ctrl.hpp b/host/lib/usrp/x300/x300_adc_ctrl.hpp
new file mode 100644
index 000000000..fce40a434
--- /dev/null
+++ b/host/lib/usrp/x300/x300_adc_ctrl.hpp
@@ -0,0 +1,44 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_X300_ADC_CTRL_HPP
+#define INCLUDED_X300_ADC_CTRL_HPP
+
+#include <uhd/types/serial.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/utility.hpp>
+
+class x300_adc_ctrl : boost::noncopyable
+{
+public:
+    typedef boost::shared_ptr<x300_adc_ctrl> sptr;
+
+    /*!
+     * Make a codec control for the ADC.
+     * \param iface a pointer to the interface object
+     * \param spiface the interface to spi
+     * \return a new codec control object
+     */
+    static sptr make(uhd::spi_iface::sptr iface, const size_t slaveno);
+
+    virtual double set_gain(const double &) = 0;
+
+    virtual void set_test_word(const std::string &patterna, const std::string &patternb, const boost::uint32_t = 0) = 0;
+
+};
+
+#endif /* INCLUDED_X300_ADC_CTRL_HPP */
diff --git a/host/lib/usrp/x300/x300_clock_ctrl.cpp b/host/lib/usrp/x300/x300_clock_ctrl.cpp
new file mode 100644
index 000000000..1a4cd4668
--- /dev/null
+++ b/host/lib/usrp/x300/x300_clock_ctrl.cpp
@@ -0,0 +1,396 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "lmk04816_regs.hpp"
+#include "x300_clock_ctrl.hpp"
+#include <uhd/utils/safe_call.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/format.hpp>
+#include <stdexcept>
+#include <cmath>
+#include <cstdlib>
+
+using namespace uhd;
+
+class x300_clock_ctrl_impl : public x300_clock_ctrl    {
+
+public:
+
+~x300_clock_ctrl_impl(void) {}
+
+x300_clock_ctrl_impl(uhd::spi_iface::sptr spiface,
+    const size_t slaveno,
+    const size_t hw_rev,
+    const double master_clock_rate,
+    const double system_ref_rate):
+    _spiface(spiface),
+    _slaveno(slaveno),
+    _hw_rev(hw_rev),
+    _master_clock_rate(master_clock_rate),
+    _system_ref_rate(system_ref_rate)
+{
+    set_master_clock_rate(master_clock_rate);
+}
+
+void sync_clocks(void) {
+    //soft sync:
+    //put the sync IO into output mode - FPGA must be input
+    //write low, then write high - this triggers a soft sync
+    _lmk04816_regs.SYNC_POL_INV = lmk04816_regs_t::SYNC_POL_INV_SYNC_LOW;
+    this->write_regs(11);
+    _lmk04816_regs.SYNC_POL_INV = lmk04816_regs_t::SYNC_POL_INV_SYNC_HIGH;
+    this->write_regs(11);
+}
+
+double get_master_clock_rate(void) {
+    return _master_clock_rate;
+}
+
+double get_sysref_clock_rate(void) {
+    return _system_ref_rate;
+}
+
+double get_refout_clock_rate(void) {
+    //We support only one reference output rate
+    return 10e6;
+}
+
+void set_dboard_rate(const x300_clock_which_t, double rate) {
+    if(not doubles_are_equal(rate, get_master_clock_rate())) {
+        throw uhd::not_implemented_error("x3xx set dboard clock rate does not support setting an arbitrary clock rate");
+    }
+}
+
+std::vector<double> get_dboard_rates(const x300_clock_which_t) {
+    /* Right now, the only supported daughterboard clock rate is the master clock
+    * rate. TODO Implement divider settings for lower clock rates for legacy
+    * daughterboard support. */
+
+    std::vector<double> rates;
+    rates.push_back(get_master_clock_rate());
+    return rates;
+}
+
+void set_ref_out(const bool enable) {
+    // TODO  Implement divider configuration to allow for configurable output
+    // rates
+    if (enable)
+        _lmk04816_regs.CLKout10_TYPE = lmk04816_regs_t::CLKOUT10_TYPE_LVDS;
+    else
+        _lmk04816_regs.CLKout10_TYPE = lmk04816_regs_t::CLKOUT10_TYPE_P_DOWN;
+    this->write_regs(8);
+}
+
+void write_regs(boost::uint8_t addr) {
+    boost::uint32_t data = _lmk04816_regs.get_reg(addr);
+    _spiface->write_spi(_slaveno, spi_config_t::EDGE_RISE, data,32);
+}
+
+
+private:
+
+void set_master_clock_rate(double clock_rate) {
+    /* The X3xx has two primary rates. The first is the
+     * _system_ref_rate, which is sourced from the "clock_source"/"value" field
+     * of the property tree, and whose value can be 10e6, 30.72e6, or 200e6.
+     * The _system_ref_rate is the input to the clocking system, and
+     * what comes out is a disciplined master clock running at the
+     * _master_clock_rate. As such, only certain combinations of
+     * system reference rates and master clock rates are supported.
+     * Additionally, a subset of these will operate in "zero delay" mode. */
+
+    enum opmode_t { INVALID,
+                    m10M_200M_NOZDEL,      // used for debug purposes only
+                    m10M_200M_ZDEL,        // Normal mode
+                    m30_72M_184_32M_ZDEL,  // LTE with external ref, aka CPRI Mode
+                    m10M_184_32M_NOZDEL,   // LTE with 10 MHz ref
+                    m10M_120M_ZDEL };       // NI USRP 120 MHz Clocking
+
+    /* The default clocking mode is 10MHz reference generating a 200 MHz master
+     * clock, in zero-delay mode. */
+    opmode_t clocking_mode = INVALID;
+
+    if(doubles_are_equal(_system_ref_rate, 10e6)) {
+        if(doubles_are_equal(clock_rate, 184.32e6)) {
+            /* 10MHz reference, 184.32 MHz master clock out, NOT Zero Delay. */
+            clocking_mode = m10M_184_32M_NOZDEL;
+        } else if(doubles_are_equal(clock_rate, 200e6)) {
+            /* 10MHz reference, 200 MHz master clock out, Zero Delay */
+            clocking_mode = m10M_200M_ZDEL;
+        } else if(doubles_are_equal(clock_rate, 120e6)) {
+            /* 10MHz reference, 120 MHz master clock rate, Zero Delay */
+            clocking_mode = m10M_120M_ZDEL;
+        }
+    } else if(doubles_are_equal(_system_ref_rate, 30.72e6)) {
+        if(doubles_are_equal(clock_rate, 184.32e6)) {
+            /* 30.72MHz reference, 184.32 MHz master clock out, Zero Delay */
+            clocking_mode = m30_72M_184_32M_ZDEL;
+        }
+    }
+
+    if(clocking_mode == INVALID) {
+        throw uhd::runtime_error(str(boost::format("A master clock rate of %f cannot be derived from a system reference rate of %f") % clock_rate % _system_ref_rate));
+    }
+
+    // For 200 MHz output, the VCO is run at 2400 MHz
+    // For the LTE/CPRI rate of 184.32 MHz, the VCO runs at 2580.48 MHz
+
+    int vco_div = 0;
+
+    // Note: PLL2 N2 prescaler is enabled for all cases
+    //       PLL2 reference doubler is enabled for all cases
+
+    /* All LMK04816 settings are from the LMK datasheet for our clocking
+     * architecture. Please refer to the datasheet for more information. */
+    switch (clocking_mode) {
+        case m10M_200M_NOZDEL:
+            vco_div = 12;
+            _lmk04816_regs.MODE = lmk04816_regs_t::MODE_DUAL_INT;
+
+            // PLL1 - 2 MHz compare frequency
+            _lmk04816_regs.PLL1_N_28 = 48;
+            _lmk04816_regs.PLL1_R_27 = 5;
+            _lmk04816_regs.PLL1_CP_GAIN_27 = lmk04816_regs_t::PLL1_CP_GAIN_27_100UA;
+
+            // PLL2 - 48 MHz compare frequency
+            _lmk04816_regs.PLL2_N_30 = 25;
+            _lmk04816_regs.PLL2_P_30 = lmk04816_regs_t::PLL2_P_30_DIV_2A;
+            _lmk04816_regs.PLL2_R_28 = 4;
+            _lmk04816_regs.PLL2_CP_GAIN_26 = lmk04816_regs_t::PLL2_CP_GAIN_26_3200UA;
+
+            break;
+
+        case m10M_200M_ZDEL:
+            vco_div = 12;
+            _lmk04816_regs.MODE = lmk04816_regs_t::MODE_DUAL_INT_ZER_DELAY;
+
+            // PLL1 - 2 MHz compare frequency
+            _lmk04816_regs.PLL1_N_28 = 100;
+            _lmk04816_regs.PLL1_R_27 = 5;
+            _lmk04816_regs.PLL1_CP_GAIN_27 = lmk04816_regs_t::PLL1_CP_GAIN_27_100UA;
+
+            // PLL2 - 96 MHz compare frequency
+            _lmk04816_regs.PLL2_N_30 = 5;
+            _lmk04816_regs.PLL2_P_30 = lmk04816_regs_t::PLL2_P_30_DIV_5;
+            _lmk04816_regs.PLL2_R_28 = 2;
+
+            if(_hw_rev <= 4)
+                _lmk04816_regs.PLL2_CP_GAIN_26 = lmk04816_regs_t::PLL2_CP_GAIN_26_1600UA;
+            else
+                _lmk04816_regs.PLL2_CP_GAIN_26 = lmk04816_regs_t::PLL2_CP_GAIN_26_400UA;
+
+            break;
+
+        case m30_72M_184_32M_ZDEL:
+            vco_div=14;
+            _lmk04816_regs.MODE = lmk04816_regs_t::MODE_DUAL_INT_ZER_DELAY;
+
+            // PLL1 - 2.048 MHz compare frequency
+            _lmk04816_regs.PLL1_N_28 = 90;
+            _lmk04816_regs.PLL1_R_27 = 15;
+            _lmk04816_regs.PLL1_CP_GAIN_27 = lmk04816_regs_t::PLL1_CP_GAIN_27_100UA;
+
+            // PLL2 - 7.68 MHz compare frequency
+            _lmk04816_regs.PLL2_N_30 = 168;
+            _lmk04816_regs.PLL2_P_30 = lmk04816_regs_t::PLL2_P_30_DIV_2A;
+            _lmk04816_regs.PLL2_R_28 = 25;
+            _lmk04816_regs.PLL2_CP_GAIN_26 = lmk04816_regs_t::PLL2_CP_GAIN_26_3200UA;
+
+            _lmk04816_regs.PLL2_R3_LF = lmk04816_regs_t::PLL2_R3_LF_1KILO_OHM;
+            _lmk04816_regs.PLL2_C3_LF = lmk04816_regs_t::PLL2_C3_LF_39PF;
+
+            _lmk04816_regs.PLL2_R4_LF = lmk04816_regs_t::PLL2_R4_LF_1KILO_OHM;
+            _lmk04816_regs.PLL2_C4_LF = lmk04816_regs_t::PLL2_C4_LF_34PF;
+
+            break;
+
+        case m10M_184_32M_NOZDEL:
+            vco_div=14;
+            _lmk04816_regs.MODE = lmk04816_regs_t::MODE_DUAL_INT;
+
+            // PLL1 - 2 MHz compare frequency
+            _lmk04816_regs.PLL1_N_28 = 48;
+            _lmk04816_regs.PLL1_R_27 = 5;
+            _lmk04816_regs.PLL1_CP_GAIN_27 = lmk04816_regs_t::PLL1_CP_GAIN_27_100UA;
+
+            // PLL2 - 7.68 MHz compare frequency
+            _lmk04816_regs.PLL2_N_30 = 168;
+            _lmk04816_regs.PLL2_P_30 = lmk04816_regs_t::PLL2_P_30_DIV_2A;
+            _lmk04816_regs.PLL2_R_28 = 25;
+            _lmk04816_regs.PLL2_CP_GAIN_26 = lmk04816_regs_t::PLL2_CP_GAIN_26_3200UA;
+
+            _lmk04816_regs.PLL2_R3_LF = lmk04816_regs_t::PLL2_R3_LF_4KILO_OHM;
+            _lmk04816_regs.PLL2_C3_LF = lmk04816_regs_t::PLL2_C3_LF_39PF;
+
+            _lmk04816_regs.PLL2_R4_LF = lmk04816_regs_t::PLL2_R4_LF_1KILO_OHM;
+            _lmk04816_regs.PLL2_C4_LF = lmk04816_regs_t::PLL2_C4_LF_71PF;
+
+            break;
+
+        case m10M_120M_ZDEL:
+            vco_div = 20;
+            _lmk04816_regs.MODE = lmk04816_regs_t::MODE_DUAL_INT_ZER_DELAY;
+
+            // PLL1 - 2 MHz compare frequency
+            _lmk04816_regs.PLL1_N_28 = 60;
+            _lmk04816_regs.PLL1_R_27 = 5;
+            _lmk04816_regs.PLL1_CP_GAIN_27 = lmk04816_regs_t::PLL1_CP_GAIN_27_100UA;
+
+            // PLL2 - 96 MHz compare frequency
+            _lmk04816_regs.PLL2_N_30 = 5;
+            _lmk04816_regs.PLL2_P_30 = lmk04816_regs_t::PLL2_P_30_DIV_5;
+            _lmk04816_regs.PLL2_R_28 = 2;
+
+            if(_hw_rev <= 4)
+                _lmk04816_regs.PLL2_CP_GAIN_26 = lmk04816_regs_t::PLL2_CP_GAIN_26_1600UA;
+            else
+                _lmk04816_regs.PLL2_CP_GAIN_26 = lmk04816_regs_t::PLL2_CP_GAIN_26_400UA;
+
+            break;
+
+        default:
+            UHD_THROW_INVALID_CODE_PATH();
+            break;
+    };
+
+    /* Reset the LMK clock controller. */
+    _lmk04816_regs.RESET = lmk04816_regs_t::RESET_RESET;
+    this->write_regs(0);
+    _lmk04816_regs.RESET = lmk04816_regs_t::RESET_NO_RESET;
+    this->write_regs(0);
+
+    /* Initial power-up */
+    _lmk04816_regs.CLKout0_1_PD = lmk04816_regs_t::CLKOUT0_1_PD_POWER_UP;
+    this->write_regs(0);
+    _lmk04816_regs.CLKout0_1_DIV = vco_div;
+    this->write_regs(0);
+
+    // Register 1
+    _lmk04816_regs.CLKout2_3_PD = lmk04816_regs_t::CLKOUT2_3_PD_POWER_UP;
+    _lmk04816_regs.CLKout2_3_DIV = vco_div;
+    // Register 2
+    _lmk04816_regs.CLKout4_5_PD = lmk04816_regs_t::CLKOUT4_5_PD_POWER_UP;
+    _lmk04816_regs.CLKout4_5_DIV = vco_div;
+    // Register 3
+    _lmk04816_regs.CLKout6_7_DIV = vco_div;
+    _lmk04816_regs.CLKout6_7_OSCin_Sel = lmk04816_regs_t::CLKOUT6_7_OSCIN_SEL_VCO;
+    // Register 4
+    _lmk04816_regs.CLKout8_9_DIV = vco_div;
+    // Register 5
+    _lmk04816_regs.CLKout10_11_PD = lmk04816_regs_t::CLKOUT10_11_PD_NORMAL;
+    _lmk04816_regs.CLKout10_11_DIV = vco_div;
+
+    // Register 6
+    _lmk04816_regs.CLKout0_TYPE = lmk04816_regs_t::CLKOUT0_TYPE_LVDS; //FPGA
+    _lmk04816_regs.CLKout1_TYPE = lmk04816_regs_t::CLKOUT1_TYPE_P_DOWN; //CPRI feedback clock, use LVDS
+    _lmk04816_regs.CLKout2_TYPE = lmk04816_regs_t::CLKOUT2_TYPE_LVPECL_700MVPP; //DB_0_RX
+    _lmk04816_regs.CLKout3_TYPE = lmk04816_regs_t::CLKOUT3_TYPE_LVPECL_700MVPP; //DB_1_RX
+    // Register 7
+    _lmk04816_regs.CLKout4_TYPE = lmk04816_regs_t::CLKOUT4_TYPE_LVPECL_700MVPP; //DB_1_TX
+    _lmk04816_regs.CLKout5_TYPE = lmk04816_regs_t::CLKOUT5_TYPE_LVPECL_700MVPP; //DB_0_TX
+    _lmk04816_regs.CLKout6_TYPE = lmk04816_regs_t::CLKOUT6_TYPE_LVPECL_700MVPP; //DB0_DAC
+    _lmk04816_regs.CLKout7_TYPE = lmk04816_regs_t::CLKOUT7_TYPE_LVPECL_700MVPP; //DB1_DAC
+    _lmk04816_regs.CLKout8_TYPE = lmk04816_regs_t::CLKOUT8_TYPE_LVPECL_700MVPP; //DB0_ADC
+    // Register 8
+    _lmk04816_regs.CLKout9_TYPE = lmk04816_regs_t::CLKOUT9_TYPE_LVPECL_700MVPP; //DB1_ADC
+    _lmk04816_regs.CLKout10_TYPE = lmk04816_regs_t::CLKOUT10_TYPE_LVDS; //REF_CLKOUT
+    _lmk04816_regs.CLKout11_TYPE = lmk04816_regs_t::CLKOUT11_TYPE_P_DOWN; //Debug header, use LVPECL
+
+
+    // Register 10
+    _lmk04816_regs.EN_OSCout0 = lmk04816_regs_t::EN_OSCOUT0_DISABLED; //Debug header
+    _lmk04816_regs.FEEDBACK_MUX = 0; //use output 0 (FPGA clock) for feedback
+    _lmk04816_regs.EN_FEEDBACK_MUX = lmk04816_regs_t::EN_FEEDBACK_MUX_ENABLED;
+
+    // Register 11
+    // MODE set in individual cases above
+    _lmk04816_regs.SYNC_QUAL = lmk04816_regs_t::SYNC_QUAL_FB_MUX;
+    _lmk04816_regs.EN_SYNC = lmk04816_regs_t::EN_SYNC_ENABLE;
+    _lmk04816_regs.NO_SYNC_CLKout0_1 = lmk04816_regs_t::NO_SYNC_CLKOUT0_1_CLOCK_XY_SYNC;
+    _lmk04816_regs.NO_SYNC_CLKout2_3 = lmk04816_regs_t::NO_SYNC_CLKOUT2_3_CLOCK_XY_SYNC;
+    _lmk04816_regs.NO_SYNC_CLKout4_5 = lmk04816_regs_t::NO_SYNC_CLKOUT4_5_CLOCK_XY_SYNC;
+    _lmk04816_regs.NO_SYNC_CLKout8_9 = lmk04816_regs_t::NO_SYNC_CLKOUT8_9_CLOCK_XY_SYNC;
+    _lmk04816_regs.NO_SYNC_CLKout10_11 = lmk04816_regs_t::NO_SYNC_CLKOUT10_11_CLOCK_XY_SYNC;
+    _lmk04816_regs.SYNC_EN_AUTO = lmk04816_regs_t::SYNC_EN_AUTO_SYNC_INT_GEN;
+    _lmk04816_regs.SYNC_POL_INV = lmk04816_regs_t::SYNC_POL_INV_SYNC_LOW;
+    _lmk04816_regs.SYNC_TYPE = lmk04816_regs_t::SYNC_TYPE_INPUT;
+
+    // Register 12
+    _lmk04816_regs.LD_MUX = lmk04816_regs_t::LD_MUX_BOTH;
+
+    /* Input Clock Configurations */
+    // Register 13
+    _lmk04816_regs.EN_CLKin0 = lmk04816_regs_t::EN_CLKIN0_NO_VALID_USE;  // This is not connected
+    _lmk04816_regs.EN_CLKin2 = lmk04816_regs_t::EN_CLKIN2_NO_VALID_USE;  // Used only for CPRI
+    _lmk04816_regs.Status_CLKin1_MUX = lmk04816_regs_t::STATUS_CLKIN1_MUX_UWIRE_RB;
+    _lmk04816_regs.CLKin_Select_MODE = lmk04816_regs_t::CLKIN_SELECT_MODE_CLKIN1_MAN;
+    _lmk04816_regs.HOLDOVER_MUX = lmk04816_regs_t::HOLDOVER_MUX_PLL1_R;
+    // Register 14
+    _lmk04816_regs.Status_CLKin1_TYPE = lmk04816_regs_t::STATUS_CLKIN1_TYPE_OUT_PUSH_PULL;
+    _lmk04816_regs.Status_CLKin0_TYPE = lmk04816_regs_t::STATUS_CLKIN0_TYPE_OUT_PUSH_PULL;
+
+    // Register 26
+    // PLL2_CP_GAIN_26 set above in individual cases
+    _lmk04816_regs.PLL2_CP_POL_26 = lmk04816_regs_t::PLL2_CP_POL_26_NEG_SLOPE;
+    _lmk04816_regs.EN_PLL2_REF_2X = lmk04816_regs_t::EN_PLL2_REF_2X_DOUBLED_FREQ_REF;
+
+    // Register 27
+    // PLL1_CP_GAIN_27 set in individual cases above
+    // PLL1_R_27 set in the individual cases above
+
+    // Register 28
+    // PLL1_N_28 and PLL2_R_28 are set in the individual cases above
+
+    // Register 29
+    _lmk04816_regs.PLL2_N_CAL_29 = _lmk04816_regs.PLL2_N_30;  // N_CAL should always match N
+    _lmk04816_regs.OSCin_FREQ_29 = lmk04816_regs_t::OSCIN_FREQ_29_63_TO_127MHZ;
+
+    // Register 30
+    // PLL2_P_30 set in individual cases above
+    // PLL2_N_30 set in individual cases above
+
+    /* Write the configuration values into the LMK */
+    for (size_t i = 1; i <= 16; ++i) {
+        this->write_regs(i);
+    }
+    for (size_t i = 24; i <= 31; ++i) {
+        this->write_regs(i);
+    }
+
+    this->sync_clocks();
+}
+
+UHD_INLINE bool doubles_are_equal(double a, double b) {
+    return  (std::fabs(a - b) < std::numeric_limits<double>::epsilon());
+}
+
+const spi_iface::sptr _spiface;
+const size_t _slaveno;
+const size_t _hw_rev;
+const double _master_clock_rate;
+const double _system_ref_rate;
+lmk04816_regs_t _lmk04816_regs;
+};
+
+x300_clock_ctrl::sptr x300_clock_ctrl::make(uhd::spi_iface::sptr spiface,
+        const size_t slaveno,
+        const size_t hw_rev,
+        const double master_clock_rate,
+        const double system_ref_rate) {
+    return sptr(new x300_clock_ctrl_impl(spiface, slaveno, hw_rev,
+                master_clock_rate, system_ref_rate));
+}
diff --git a/host/lib/usrp/x300/x300_clock_ctrl.hpp b/host/lib/usrp/x300/x300_clock_ctrl.hpp
new file mode 100644
index 000000000..0e3caf900
--- /dev/null
+++ b/host/lib/usrp/x300/x300_clock_ctrl.hpp
@@ -0,0 +1,83 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_X300_CLOCK_CTRL_HPP
+#define INCLUDED_X300_CLOCK_CTRL_HPP
+
+#include <uhd/types/serial.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/utility.hpp>
+
+
+enum x300_clock_which_t
+{
+    X300_CLOCK_WHICH_ADC0,
+    X300_CLOCK_WHICH_ADC1,
+    X300_CLOCK_WHICH_DAC0,
+    X300_CLOCK_WHICH_DAC1,
+    X300_CLOCK_WHICH_DB0_RX,
+    X300_CLOCK_WHICH_DB0_TX,
+    X300_CLOCK_WHICH_DB1_RX,
+    X300_CLOCK_WHICH_DB1_TX,
+    X300_CLOCK_WHICH_TEST,
+};
+
+class x300_clock_ctrl : boost::noncopyable
+{
+public:
+
+    typedef boost::shared_ptr<x300_clock_ctrl> sptr;
+
+    static sptr make(uhd::spi_iface::sptr spiface,
+            const size_t slaveno,
+            const size_t hw_rev,
+            const double master_clock_rate,
+            const double system_ref_rate);
+
+    /*! Get the master clock rate of the device.
+     * \return the clock frequency in Hz
+     */
+    virtual double get_master_clock_rate(void) = 0;
+
+    /*! Get the system reference rate of the device.
+     * \return the clock frequency in Hz
+     */
+    virtual double get_sysref_clock_rate(void) = 0;
+
+    /*! Get the current reference output rate
+     * \return the clock frequency in Hz
+     */
+    virtual double get_refout_clock_rate(void) = 0;
+
+    /*! Set the clock rate on the given daughterboard clock.
+     * \param rate the new clock rate
+     * \throw exception when rate invalid
+     */
+    virtual void set_dboard_rate(const x300_clock_which_t which, double rate) = 0;
+
+    /*! Get a list of possible daughterboard clock rates.
+     * \return a list of clock rates in Hz
+     */
+    virtual std::vector<double> get_dboard_rates(const x300_clock_which_t which) = 0;
+
+    /*! Turn the reference output on/off
+     * \param true = on, false = off
+     */
+    virtual void set_ref_out(const bool) = 0;
+};
+
+#endif /* INCLUDED_X300_CLOCK_CTRL_HPP */
diff --git a/host/lib/usrp/x300/x300_dac_ctrl.cpp b/host/lib/usrp/x300/x300_dac_ctrl.cpp
new file mode 100644
index 000000000..5eae9cc48
--- /dev/null
+++ b/host/lib/usrp/x300/x300_dac_ctrl.cpp
@@ -0,0 +1,146 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "x300_dac_ctrl.hpp"
+#include "x300_regs.hpp"
+#include <uhd/types/time_spec.hpp>
+#include <uhd/utils/msg.hpp>
+#include <uhd/utils/log.hpp>
+#include <uhd/utils/safe_call.hpp>
+#include <uhd/exception.hpp>
+#include <boost/foreach.hpp>
+#include <boost/thread/thread.hpp> //sleep
+
+using namespace uhd;
+
+#define write_ad9146_reg(addr, data) \
+    _iface->write_spi(_slaveno, spi_config_t::EDGE_RISE, ((addr) << 8) | (data), 16)
+#define read_ad9146_reg(addr) \
+    (_iface->read_spi(_slaveno, spi_config_t::EDGE_RISE, ((addr) << 8) | (1 << 15), 16) & 0xff)
+
+/*!
+ * A X300 codec control specific to the ad9146 ic.
+ */
+class x300_dac_ctrl_impl : public x300_dac_ctrl
+{
+public:
+    x300_dac_ctrl_impl(uhd::spi_iface::sptr iface, const size_t slaveno, const double refclk):
+        _iface(iface), _slaveno(slaveno)
+    {
+        write_ad9146_reg(0x00, 0x20); // Take DAC into reset.
+        write_ad9146_reg(0x00, 0x80); // Enable SPI reads and come out of reset
+        write_ad9146_reg(0x1e, 0x01); // Data path config - set for proper operation
+
+        // Calculate N0 to be VCO friendly.
+        // Aim for VCO between 1 and 2GHz, assert otherwise.
+	//  const int N1 = 4;
+	const int N1 = 4;
+        int N0_val, N0;
+        for (N0_val = 0; N0_val < 3; N0_val++)
+        {
+            N0 = (1 << N0_val); //1, 2, 4
+            if ((refclk * N0 * N1) >= 1e9) break;
+        }
+        UHD_ASSERT_THROW((refclk * N0 * N1) >= 1e9);
+        UHD_ASSERT_THROW((refclk * N0 * N1) <= 2e9);
+
+        /* Start PLL */
+        //write_ad9146_reg(0x0C, 0xD1); // Narrow PLL loop filter, Midrange charge pump.
+        write_ad9146_reg(0x0D, 0xD1 | (N0_val << 2)); // N1=4, N2=16, N0 as calculated
+	//write_ad9146_reg(0x0D, 0x90 | (N0_val << 2)); // N1=2, N2=8, N0 as calculated
+        write_ad9146_reg(0x0A, 0xCF); // Auto init VCO band training as per datasheet
+        write_ad9146_reg(0x0A, 0xA0); // See above.
+
+        // Verify PLL is Locked. 1 sec timeout. 
+        // NOTE: Data sheet inconsistant about which pins give PLL lock status. FIXME!
+        const time_spec_t exit_time = time_spec_t::get_system_time() + time_spec_t(1.0);
+        while (true)
+        {
+            const size_t reg_e = read_ad9146_reg(0x0E); /* Expect bit 7 = 1 */
+            if ((exit_time < time_spec_t::get_system_time()) && ((reg_e & (1 << 7)) == 0))
+	      throw uhd::runtime_error("x300_dac_ctrl: timeout waiting for DAC PLL to lock");
+	    else if  ((reg_e & ((1 << 7) | (1 << 6))) != 0) break;
+            boost::this_thread::sleep(boost::posix_time::milliseconds(10));
+        }
+
+        /* Skew DCI signal to find stable data eye */
+        //write_ad9146_reg(0x16, 0x04); //Disable delay in DCI
+        //write_ad9146_reg(0x16, 0x00); //165ps delay in DCI
+        //write_ad9146_reg(0x16, 0x01); //375ps delay in DCI
+        write_ad9146_reg(0x16, 0x02); //615ps delay in DCI
+        //write_ad9146_reg(0x16, 0x03); //720ps delay in DCI
+ 
+        write_ad9146_reg(0x03, 0x00); // 2's comp, I first, byte wide interface
+
+        //fpga wants I,Q in the sample word:
+        //first transaction goes into low bits
+        //second transaction goes into high bits
+        //therefore, we want Q to go first (bit 6 == 1)
+        write_ad9146_reg(0x03, (1 << 6)); //2s comp, i first, byte mode
+
+        write_ad9146_reg(0x10, 0x48); // Disable SYNC mode.
+        write_ad9146_reg(0x17, 0x04); // FIFO write pointer offset
+        write_ad9146_reg(0x18, 0x02); // Request soft FIFO align
+        write_ad9146_reg(0x18, 0x00); // (See above)
+        write_ad9146_reg(0x1B, 0xE4); // Bypass: Modulator, InvSinc, IQ Bal
+
+        /* Configure interpolation filters */
+        write_ad9146_reg(0x1C, 0x00); // Configure HB1
+        write_ad9146_reg(0x1D, 0x00); // Configure HB2
+
+    }
+
+
+    ~x300_dac_ctrl_impl(void)
+    {
+        UHD_SAFE_CALL
+        (
+            write_ad9146_reg(0x1, 0xf); //total power down
+            write_ad9146_reg(0x2, 0xf); //total power down
+        )
+    }
+
+  void arm_dac_sync(void)
+  {
+    //
+    // Attempt to synchronize AD9146's
+    //
+    write_ad9146_reg(0x10, 0xCF); // Enable SYNC mode. Sync Averaging set to 128.
+
+    const time_spec_t exit_time = time_spec_t::get_system_time() + time_spec_t(1.0);
+    while (true)
+      {
+	const size_t reg_12 = read_ad9146_reg(0x12); /* Expect bit 7 = 0, bit 6 = 1 */
+	if ((exit_time < time_spec_t::get_system_time()) && (((reg_12 & (1 << 6)) == 0) || ((reg_12 & (1 << 7)) != 0)))
+	  throw uhd::runtime_error("x300_dac_ctrl: timeout waiting for backend synchronization");
+	else if (((reg_12 & (1 << 6)) != 0) && ((reg_12 & (1 << 7)) == 0))  break;
+	boost::this_thread::sleep(boost::posix_time::milliseconds(10));
+      }
+  }
+
+private:
+    uhd::spi_iface::sptr _iface;
+    const size_t _slaveno;
+};
+
+/***********************************************************************
+ * Public make function for the DAC control
+ **********************************************************************/
+x300_dac_ctrl::sptr x300_dac_ctrl::make(uhd::spi_iface::sptr iface, const size_t slaveno, const double clock_rate)
+{
+    return sptr(new x300_dac_ctrl_impl(iface, slaveno, clock_rate));
+}
diff --git a/host/lib/usrp/x300/x300_dac_ctrl.hpp b/host/lib/usrp/x300/x300_dac_ctrl.hpp
new file mode 100644
index 000000000..0db7e1e35
--- /dev/null
+++ b/host/lib/usrp/x300/x300_dac_ctrl.hpp
@@ -0,0 +1,42 @@
+//
+// Copyright 2010-2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_X300_DAC_CTRL_HPP
+#define INCLUDED_X300_DAC_CTRL_HPP
+
+#include <uhd/types/serial.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/utility.hpp>
+
+class x300_dac_ctrl : boost::noncopyable
+{
+public:
+    typedef boost::shared_ptr<x300_dac_ctrl> sptr;
+
+    /*!
+     * Make a codec control for the DAC.
+     * \param iface a pointer to the interface object
+     * \param spiface the interface to spi
+     * \return a new codec control object
+     */
+    static sptr make(uhd::spi_iface::sptr iface, const size_t slaveno, const double clock_rate);
+
+    // ! Arm the sync feature in DAC
+    virtual void arm_dac_sync(void) = 0;
+};
+
+#endif /* INCLUDED_X300_DAC_CTRL_HPP */
diff --git a/host/lib/usrp/x300/x300_dboard_iface.cpp b/host/lib/usrp/x300/x300_dboard_iface.cpp
new file mode 100644
index 000000000..43da7ca08
--- /dev/null
+++ b/host/lib/usrp/x300/x300_dboard_iface.cpp
@@ -0,0 +1,333 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "x300_impl.hpp"
+#include "x300_regs.hpp"
+#include <uhd/usrp/dboard_iface.hpp>
+#include <uhd/utils/safe_call.hpp>
+#include <boost/assign/list_of.hpp>
+#include <boost/math/special_functions/round.hpp>
+#include "ad7922_regs.hpp" //aux adc
+#include "ad5623_regs.hpp" //aux dac
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace boost::assign;
+
+class x300_dboard_iface : public dboard_iface
+{
+public:
+    x300_dboard_iface(const x300_dboard_iface_config_t &config);
+    ~x300_dboard_iface(void);
+
+    special_props_t get_special_props(void)
+    {
+        special_props_t props;
+        props.soft_clock_divider = false;
+        props.mangle_i2c_addrs = (_config.dboard_slot == 1);
+        return props;
+    }
+
+    void write_aux_dac(unit_t, aux_dac_t, double);
+    double read_aux_adc(unit_t, aux_adc_t);
+
+    void _set_pin_ctrl(unit_t, boost::uint16_t);
+    void _set_atr_reg(unit_t, atr_reg_t, boost::uint16_t);
+    void _set_gpio_ddr(unit_t, boost::uint16_t);
+    void _set_gpio_out(unit_t, boost::uint16_t);
+
+    void set_gpio_debug(unit_t, int);
+    boost::uint16_t read_gpio(unit_t);
+
+    void write_i2c(boost::uint16_t, const byte_vector_t &);
+    byte_vector_t read_i2c(boost::uint16_t, size_t);
+
+    void set_clock_rate(unit_t, double);
+    double get_clock_rate(unit_t);
+    std::vector<double> get_clock_rates(unit_t);
+    void set_clock_enabled(unit_t, bool);
+    double get_codec_rate(unit_t);
+
+    void write_spi(
+        unit_t unit,
+        const spi_config_t &config,
+        boost::uint32_t data,
+        size_t num_bits
+    );
+
+    boost::uint32_t read_write_spi(
+        unit_t unit,
+        const spi_config_t &config,
+        boost::uint32_t data,
+        size_t num_bits
+    );
+
+    const x300_dboard_iface_config_t _config;
+    uhd::dict<unit_t, ad5623_regs_t> _dac_regs;
+    uhd::dict<unit_t, double> _clock_rates;
+    void _write_aux_dac(unit_t);
+
+};
+
+/***********************************************************************
+ * Make Function
+ **********************************************************************/
+dboard_iface::sptr x300_make_dboard_iface(const x300_dboard_iface_config_t &config)
+{
+    return dboard_iface::sptr(new x300_dboard_iface(config));
+}
+
+/***********************************************************************
+ * Structors
+ **********************************************************************/
+x300_dboard_iface::x300_dboard_iface(const x300_dboard_iface_config_t &config):
+    _config(config)
+{
+    //reset the aux dacs
+    _dac_regs[UNIT_RX] = ad5623_regs_t();
+    _dac_regs[UNIT_TX] = ad5623_regs_t();
+    BOOST_FOREACH(unit_t unit, _dac_regs.keys())
+    {
+        _dac_regs[unit].data = 1;
+        _dac_regs[unit].addr = ad5623_regs_t::ADDR_ALL;
+        _dac_regs[unit].cmd  = ad5623_regs_t::CMD_RESET;
+        this->_write_aux_dac(unit);
+    }
+
+    this->set_clock_enabled(UNIT_RX, false);
+    this->set_clock_enabled(UNIT_TX, false);
+
+    this->set_clock_rate(UNIT_RX, _config.clock->get_master_clock_rate());
+    this->set_clock_rate(UNIT_TX, _config.clock->get_master_clock_rate());
+
+
+    //some test code
+    /*
+    {
+
+        this->write_aux_dac(UNIT_TX, AUX_DAC_A, .1);
+        this->write_aux_dac(UNIT_TX, AUX_DAC_B, 1);
+        this->write_aux_dac(UNIT_RX, AUX_DAC_A, 2);
+        this->write_aux_dac(UNIT_RX, AUX_DAC_B, 3);
+        while (1)
+        {
+            UHD_VAR(this->read_aux_adc(UNIT_TX, AUX_ADC_A));
+            UHD_VAR(this->read_aux_adc(UNIT_TX, AUX_ADC_B));
+            UHD_VAR(this->read_aux_adc(UNIT_RX, AUX_ADC_A));
+            UHD_VAR(this->read_aux_adc(UNIT_RX, AUX_ADC_B));
+            sleep(1);
+        }
+    }
+    */
+
+}
+
+x300_dboard_iface::~x300_dboard_iface(void)
+{
+    UHD_SAFE_CALL
+    (
+        this->set_clock_enabled(UNIT_RX, false);
+        this->set_clock_enabled(UNIT_TX, false);
+    )
+}
+
+/***********************************************************************
+ * Clocks
+ **********************************************************************/
+void x300_dboard_iface::set_clock_rate(unit_t unit, double rate)
+{
+    _clock_rates[unit] = rate; //set to shadow
+    switch(unit)
+    {
+        case UNIT_RX:
+            _config.clock->set_dboard_rate(_config.which_rx_clk, rate);
+            return;
+        case UNIT_TX:
+            _config.clock->set_dboard_rate(_config.which_tx_clk, rate);
+            return;
+    }
+}
+
+double x300_dboard_iface::get_clock_rate(unit_t unit)
+{
+    return _clock_rates[unit]; //get from shadow
+}
+
+std::vector<double> x300_dboard_iface::get_clock_rates(unit_t unit)
+{
+    switch(unit)
+    {
+        case UNIT_RX:
+            return _config.clock->get_dboard_rates(_config.which_rx_clk);
+        case UNIT_TX:
+            return _config.clock->get_dboard_rates(_config.which_tx_clk);
+        default:
+            UHD_THROW_INVALID_CODE_PATH();
+    }
+}
+
+void x300_dboard_iface::set_clock_enabled(unit_t unit, bool enb)
+{
+    // TODO Variable DBoard clock control needs to be implemented for X300.
+}
+
+double x300_dboard_iface::get_codec_rate(unit_t)
+{
+    return _config.clock->get_master_clock_rate();
+}
+
+/***********************************************************************
+ * GPIO
+ **********************************************************************/
+void x300_dboard_iface::_set_pin_ctrl(unit_t unit, boost::uint16_t value)
+{
+    return _config.gpio->set_pin_ctrl(unit, value);
+}
+
+void x300_dboard_iface::_set_gpio_ddr(unit_t unit, boost::uint16_t value)
+{
+    return _config.gpio->set_gpio_ddr(unit, value);
+}
+
+void x300_dboard_iface::_set_gpio_out(unit_t unit, boost::uint16_t value)
+{
+    return _config.gpio->set_gpio_out(unit, value);
+}
+
+boost::uint16_t x300_dboard_iface::read_gpio(unit_t unit)
+{
+    return _config.gpio->read_gpio(unit);
+}
+
+void x300_dboard_iface::_set_atr_reg(unit_t unit, atr_reg_t atr, boost::uint16_t value)
+{
+    return _config.gpio->set_atr_reg(unit, atr, value);
+}
+
+void x300_dboard_iface::set_gpio_debug(unit_t, int)
+{
+    throw uhd::not_implemented_error("no set_gpio_debug implemented");
+}
+
+/***********************************************************************
+ * SPI
+ **********************************************************************/
+#define toslaveno(unit) \
+    (((unit) == dboard_iface::UNIT_TX)? _config.tx_spi_slaveno : _config.rx_spi_slaveno)
+
+void x300_dboard_iface::write_spi(
+    unit_t unit,
+    const spi_config_t &config,
+    boost::uint32_t data,
+    size_t num_bits
+){
+    _config.spi->write_spi(toslaveno(unit), config, data, num_bits);
+}
+
+boost::uint32_t x300_dboard_iface::read_write_spi(
+    unit_t unit,
+    const spi_config_t &config,
+    boost::uint32_t data,
+    size_t num_bits
+){
+    return _config.spi->read_spi(toslaveno(unit), config, data, num_bits);
+}
+
+/***********************************************************************
+ * I2C
+ **********************************************************************/
+void x300_dboard_iface::write_i2c(boost::uint16_t addr, const byte_vector_t &bytes)
+{
+    return _config.i2c->write_i2c(addr, bytes);
+}
+
+byte_vector_t x300_dboard_iface::read_i2c(boost::uint16_t addr, size_t num_bytes)
+{
+    return _config.i2c->read_i2c(addr, num_bytes);
+}
+
+/***********************************************************************
+ * Aux DAX/ADC
+ **********************************************************************/
+void x300_dboard_iface::_write_aux_dac(unit_t unit)
+{
+    static const uhd::dict<unit_t, int> unit_to_spi_dac = map_list_of
+        (UNIT_RX, DB_RX_LSDAC_SEN)
+        (UNIT_TX, DB_TX_LSDAC_SEN)
+    ;
+    _config.spi->write_spi(
+        unit_to_spi_dac[unit], spi_config_t::EDGE_FALL,
+        _dac_regs[unit].get_reg(), 24
+    );
+}
+
+void x300_dboard_iface::write_aux_dac(unit_t unit, aux_dac_t which, double value)
+{
+    _dac_regs[unit].data = boost::math::iround(4095*value/3.3);
+    _dac_regs[unit].cmd = ad5623_regs_t::CMD_WR_UP_DAC_CHAN_N;
+
+    typedef uhd::dict<aux_dac_t, ad5623_regs_t::addr_t> aux_dac_to_addr;
+    static const uhd::dict<unit_t, aux_dac_to_addr> unit_to_which_to_addr = map_list_of
+        (UNIT_RX, map_list_of
+            (AUX_DAC_A, ad5623_regs_t::ADDR_DAC_A)
+            (AUX_DAC_B, ad5623_regs_t::ADDR_DAC_B)
+            (AUX_DAC_C, ad5623_regs_t::ADDR_DAC_B)
+            (AUX_DAC_D, ad5623_regs_t::ADDR_DAC_A)
+        )
+        (UNIT_TX, map_list_of
+            (AUX_DAC_A, ad5623_regs_t::ADDR_DAC_A)
+            (AUX_DAC_B, ad5623_regs_t::ADDR_DAC_B)
+            (AUX_DAC_C, ad5623_regs_t::ADDR_DAC_B)
+            (AUX_DAC_D, ad5623_regs_t::ADDR_DAC_A)
+        )
+    ;
+    _dac_regs[unit].addr = unit_to_which_to_addr[unit][which];
+    this->_write_aux_dac(unit);
+}
+
+double x300_dboard_iface::read_aux_adc(unit_t unit, aux_adc_t which)
+{
+    static const uhd::dict<unit_t, int> unit_to_spi_adc = map_list_of
+        (UNIT_RX, DB_RX_LSADC_SEN)
+        (UNIT_TX, DB_TX_LSADC_SEN)
+    ;
+
+    //setup spi config args
+    spi_config_t config;
+    config.mosi_edge = spi_config_t::EDGE_FALL;
+    config.miso_edge = spi_config_t::EDGE_RISE;
+
+    //setup the spi registers
+    ad7922_regs_t ad7922_regs;
+    switch(which){
+    case AUX_ADC_A: ad7922_regs.mod = 0; break;
+    case AUX_ADC_B: ad7922_regs.mod = 1; break;
+    } ad7922_regs.chn = ad7922_regs.mod; //normal mode: mod == chn
+
+    //write and read spi
+    _config.spi->write_spi(
+        unit_to_spi_adc[unit], config,
+        ad7922_regs.get_reg(), 16
+    );
+    ad7922_regs.set_reg(boost::uint16_t(_config.spi->read_spi(
+        unit_to_spi_adc[unit], config,
+        ad7922_regs.get_reg(), 16
+    )));
+
+    //convert to voltage and return
+    return 3.3*ad7922_regs.result/4095;
+}
diff --git a/host/lib/usrp/x300/x300_fw_common.h b/host/lib/usrp/x300/x300_fw_common.h
new file mode 100644
index 000000000..c470e9bff
--- /dev/null
+++ b/host/lib/usrp/x300/x300_fw_common.h
@@ -0,0 +1,125 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_X300_FW_COMMON_H
+#define INCLUDED_X300_FW_COMMON_H
+
+#include <stdint.h>
+
+/*!
+ * Structs and constants for x300 communication.
+ * This header is shared by the firmware and host code.
+ * Therefore, this header may only contain valid C code.
+ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define X300_FW_COMPAT_MAJOR 3
+#define X300_FW_COMPAT_MINOR 0
+#define X300_FPGA_COMPAT_MAJOR 3
+
+//shared memory sections - in between the stack and the program space
+#define X300_FW_SHMEM_BASE 0x6000
+#define X300_FW_SHMEM_COMPAT_NUM 0
+#define X300_FW_SHMEM_GPSDO_STATUS 1
+#define X300_FW_SHMEM_UART_RX_INDEX 2
+#define X300_FW_SHMEM_UART_TX_INDEX 3
+#define X300_FW_SHMEM_CLAIM_STATUS 5
+#define X300_FW_SHMEM_CLAIM_TIME 6
+#define X300_FW_SHMEM_CLAIM_SRC 7
+#define X300_FW_SHMEM_UART_RX_ADDR 8
+#define X300_FW_SHMEM_UART_TX_ADDR 9
+#define X300_FW_SHMEM_UART_WORDS32 10
+#define X300_FW_SHMEM_ROUTE_MAP_ADDR 11
+#define X300_FW_SHMEM_ROUTE_MAP_LEN 12
+
+#define X300_FW_NUM_BYTES (1 << 15) //64k
+#define X300_FW_COMMS_MTU (1 << 13) //8k
+#define X300_FW_COMMS_UDP_PORT 49152
+
+#define X300_VITA_UDP_PORT 49153
+#define X300_GPSDO_UDP_PORT 49156
+#define X300_FPGA_PROG_UDP_PORT 49157
+#define X300_MTU_DETECT_UDP_PORT 49158
+
+#define X300_DEFAULT_MAC_ADDR_0         {0x00, 0x50, 0xC2, 0x85, 0x3f, 0xff}
+#define X300_DEFAULT_MAC_ADDR_1         {0x00, 0x50, 0xC2, 0x85, 0x3f, 0x33}
+
+#define X300_DEFAULT_GATEWAY            (192 << 24 | 168 << 16 | 10  << 8  | 1 << 0)
+
+#define X300_DEFAULT_IP_ETH0_1G         (192 << 24 | 168 << 16 | 10  << 8  | 2 << 0)
+#define X300_DEFAULT_IP_ETH1_1G         (192 << 24 | 168 << 16 | 20  << 8  | 2 << 0)
+#define X300_DEFAULT_IP_ETH0_10G        (192 << 24 | 168 << 16 | 30  << 8  | 2 << 0)
+#define X300_DEFAULT_IP_ETH1_10G        (192 << 24 | 168 << 16 | 40  << 8  | 2 << 0)
+
+#define X300_DEFAULT_NETMASK_ETH0_1G    (255 << 24 | 255 << 16 | 255  << 8  | 0 << 0)
+#define X300_DEFAULT_NETMASK_ETH1_1G    (255 << 24 | 255 << 16 | 255  << 8  | 0 << 0)
+#define X300_DEFAULT_NETMASK_ETH0_10G   (255 << 24 | 255 << 16 | 255  << 8  | 0 << 0)
+#define X300_DEFAULT_NETMASK_ETH1_10G   (255 << 24 | 255 << 16 | 255  << 8  | 0 << 0)
+
+#define X300_FW_COMMS_FLAGS_ACK        (1 << 0)
+#define X300_FW_COMMS_FLAGS_ERROR      (1 << 1)
+#define X300_FW_COMMS_FLAGS_POKE32     (1 << 2)
+#define X300_FW_COMMS_FLAGS_PEEK32     (1 << 3)
+
+#define X300_FPGA_PROG_FLAGS_ACK       (1 << 0)
+#define X300_FPGA_PROG_FLAGS_ERROR     (1 << 1)
+#define X300_FPGA_PROG_FLAGS_INIT      (1 << 2)
+#define X300_FPGA_PROG_FLAGS_CLEANUP   (1 << 3)
+#define X300_FPGA_PROG_FLAGS_ERASE     (1 << 4)
+#define X300_FPGA_PROG_FLAGS_VERIFY    (1 << 5)
+#define X300_FPGA_PROG_CONFIGURE       (1 << 6)
+#define X300_FPGA_PROG_CONFIG_STATUS   (1 << 7)
+
+#define X300_MTU_DETECT_ECHO_REQUEST (1 << 0)
+#define X300_MTU_DETECT_ECHO_REPLY (1 << 1)
+#define X300_MTU_DETECT_ERROR (1 << 2)
+
+typedef struct
+{
+    uint32_t flags;
+    uint32_t sequence;
+    uint32_t addr;
+    uint32_t data;
+} x300_fw_comms_t;
+
+typedef struct
+{
+    uint32_t flags;
+    uint32_t sector;
+    uint32_t index;
+    uint32_t size;
+    uint16_t data[128];
+} x300_fpga_prog_t;
+
+typedef struct
+{
+    uint32_t flags;
+} x300_fpga_prog_flags_t;
+
+typedef struct
+{
+    uint32_t flags;
+    uint32_t size;
+} x300_mtu_t;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* INCLUDED_X300_FW_COMMON_H */
diff --git a/host/lib/usrp/x300/x300_fw_ctrl.cpp b/host/lib/usrp/x300/x300_fw_ctrl.cpp
new file mode 100644
index 000000000..67c314d3f
--- /dev/null
+++ b/host/lib/usrp/x300/x300_fw_ctrl.cpp
@@ -0,0 +1,300 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/types/wb_iface.hpp>
+#include "x300_fw_common.h"
+#include <uhd/transport/udp_simple.hpp>
+#include <uhd/utils/byteswap.hpp>
+#include <uhd/utils/msg.hpp>
+#include <uhd/exception.hpp>
+#include <boost/format.hpp>
+#include <boost/thread/mutex.hpp>
+#include <uhd/transport/nirio/status.h>
+#include <uhd/transport/nirio/niriok_proxy.h>
+#include "x300_regs.hpp"
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/thread/thread.hpp>
+
+using namespace uhd;
+using namespace uhd::niusrprio;
+
+class x300_ctrl_iface : public wb_iface
+{
+public:
+    enum {num_retries = 3};
+
+    void flush(void)
+    {
+        boost::mutex::scoped_lock lock(reg_access);
+        __flush();
+    }
+
+    void poke32(const wb_addr_type addr, const boost::uint32_t data)
+    {
+        for (size_t i = 1; i <= num_retries; i++)
+        {
+            boost::mutex::scoped_lock lock(reg_access);
+            try
+            {
+                return this->__poke32(addr, data);
+            }
+            catch(const std::exception &ex)
+            {
+                const std::string error_msg = str(boost::format(
+                    "x300 fw communication failure #%u\n%s") % i % ex.what());
+                UHD_MSG(error) << error_msg << std::endl;
+                if (i == num_retries) throw uhd::io_error(error_msg);
+            }
+        }
+    }
+
+    boost::uint32_t peek32(const wb_addr_type addr)
+    {
+        for (size_t i = 1; i <= num_retries; i++)
+        {
+            boost::mutex::scoped_lock lock(reg_access);
+            try
+            {
+                boost::uint32_t data = this->__peek32(addr);
+                return data;
+            }
+            catch(const std::exception &ex)
+            {
+                const std::string error_msg = str(boost::format(
+                    "x300 fw communication failure #%u\n%s") % i % ex.what());
+                UHD_MSG(error) << error_msg << std::endl;
+                if (i == num_retries) throw uhd::io_error(error_msg);
+            }
+        }
+        return 0;
+    }
+
+protected:
+    virtual void __poke32(const wb_addr_type addr, const boost::uint32_t data) = 0;
+    virtual boost::uint32_t __peek32(const wb_addr_type addr) = 0;
+    virtual void __flush() = 0;
+
+    boost::mutex reg_access;
+};
+
+
+//-----------------------------------------------------
+// Ethernet impl
+//-----------------------------------------------------
+class x300_ctrl_iface_enet : public x300_ctrl_iface
+{
+public:
+    x300_ctrl_iface_enet(uhd::transport::udp_simple::sptr udp):
+        udp(udp), seq(0)
+    {
+        try
+        {
+            this->peek32(0);
+        }
+        catch(...){}
+    }
+
+protected:
+    virtual void __poke32(const wb_addr_type addr, const boost::uint32_t data)
+    {
+        //load request struct
+        x300_fw_comms_t request = x300_fw_comms_t();
+        request.flags = uhd::htonx<boost::uint32_t>(X300_FW_COMMS_FLAGS_ACK | X300_FW_COMMS_FLAGS_POKE32);
+        request.sequence = uhd::htonx<boost::uint32_t>(seq++);
+        request.addr = uhd::htonx(addr);
+        request.data = uhd::htonx(data);
+
+        //send request
+        __flush();
+        udp->send(boost::asio::buffer(&request, sizeof(request)));
+
+        //recv reply
+        x300_fw_comms_t reply = x300_fw_comms_t();
+        const size_t nbytes = udp->recv(boost::asio::buffer(&reply, sizeof(reply)), 1.0);
+        if (nbytes == 0) throw uhd::io_error("x300 fw poke32 - reply timed out");
+
+        //sanity checks
+        const size_t flags = uhd::ntohx<boost::uint32_t>(reply.flags);
+        UHD_ASSERT_THROW(nbytes == sizeof(reply));
+        UHD_ASSERT_THROW(not (flags & X300_FW_COMMS_FLAGS_ERROR));
+        UHD_ASSERT_THROW(flags & X300_FW_COMMS_FLAGS_POKE32);
+        UHD_ASSERT_THROW(flags & X300_FW_COMMS_FLAGS_ACK);
+        UHD_ASSERT_THROW(reply.sequence == request.sequence);
+        UHD_ASSERT_THROW(reply.addr == request.addr);
+        UHD_ASSERT_THROW(reply.data == request.data);
+    }
+
+    virtual boost::uint32_t __peek32(const wb_addr_type addr)
+    {
+        //load request struct
+        x300_fw_comms_t request = x300_fw_comms_t();
+        request.flags = uhd::htonx<boost::uint32_t>(X300_FW_COMMS_FLAGS_ACK | X300_FW_COMMS_FLAGS_PEEK32);
+        request.sequence = uhd::htonx<boost::uint32_t>(seq++);
+        request.addr = uhd::htonx(addr);
+        request.data = 0;
+
+        //send request
+        __flush();
+        udp->send(boost::asio::buffer(&request, sizeof(request)));
+
+        //recv reply
+        x300_fw_comms_t reply = x300_fw_comms_t();
+        const size_t nbytes = udp->recv(boost::asio::buffer(&reply, sizeof(reply)), 1.0);
+        if (nbytes == 0) throw uhd::io_error("x300 fw peek32 - reply timed out");
+
+        //sanity checks
+        const size_t flags = uhd::ntohx<boost::uint32_t>(reply.flags);
+        UHD_ASSERT_THROW(nbytes == sizeof(reply));
+        UHD_ASSERT_THROW(not (flags & X300_FW_COMMS_FLAGS_ERROR));
+        UHD_ASSERT_THROW(flags & X300_FW_COMMS_FLAGS_PEEK32);
+        UHD_ASSERT_THROW(flags & X300_FW_COMMS_FLAGS_ACK);
+        UHD_ASSERT_THROW(reply.sequence == request.sequence);
+        UHD_ASSERT_THROW(reply.addr == request.addr);
+
+        //return result!
+        return uhd::ntohx<boost::uint32_t>(reply.data);
+    }
+
+    virtual void __flush(void)
+    {
+        char buff[X300_FW_COMMS_MTU] = {};
+        while (udp->recv(boost::asio::buffer(buff), 0.0)){} //flush
+    }
+
+private:
+    uhd::transport::udp_simple::sptr udp;
+    size_t seq;
+};
+
+
+//-----------------------------------------------------
+// PCIe impl
+//-----------------------------------------------------
+class x300_ctrl_iface_pcie : public x300_ctrl_iface
+{
+public:
+    x300_ctrl_iface_pcie(niriok_proxy& drv_proxy):
+        _drv_proxy(drv_proxy)
+    {
+        nirio_status status = 0;
+        nirio_status_chain(_drv_proxy.set_attribute(ADDRESS_SPACE, BUS_INTERFACE), status);
+
+        //Verify that the Ettus FPGA loaded in the device. This may not be true if the
+        //user is switching to UHD after using LabVIEW FPGA.
+        boost::uint32_t pcie_fpga_signature = 0;
+        _drv_proxy.peek(FPGA_PCIE_SIG_REG, pcie_fpga_signature);
+        if (pcie_fpga_signature != FPGA_X3xx_SIG_VALUE)
+            throw uhd::io_error("cannot create x300_ctrl_iface_pcie. incorrect/no fpga image");
+
+        //Also, poll on the ZPU_STATUS bit to ensure all the state machines in the FPGA are
+        //ready to accept register transaction requests.
+        boost::uint32_t reg_data = 0xffffffff;
+        boost::posix_time::ptime start_time = boost::posix_time::microsec_clock::local_time();
+        boost::posix_time::time_duration elapsed;
+
+        do {
+            boost::this_thread::sleep(boost::posix_time::microsec(500)); //Avoid flooding the bus
+            elapsed = boost::posix_time::microsec_clock::local_time() - start_time;
+            nirio_status_chain(_drv_proxy.peek(PCIE_ZPU_STATUS_REG(0), reg_data), status);
+        } while (
+            nirio_status_not_fatal(status) &&
+            (reg_data & PCIE_ZPU_STATUS_SUSPENDED) &&
+            elapsed.total_milliseconds() < INIT_TIMEOUT_IN_MS);
+
+        nirio_status_to_exception(status, "Could not initialize x300_ctrl_iface_pcie.");
+
+        try
+        {
+            this->peek32(0);
+        }
+        catch(...){}
+    }
+
+protected:
+    virtual void __poke32(const wb_addr_type addr, const boost::uint32_t data)
+    {
+        nirio_status status = 0;
+        boost::uint32_t reg_data = 0xffffffff;
+        boost::posix_time::ptime start_time = boost::posix_time::microsec_clock::local_time();
+        boost::posix_time::time_duration elapsed;
+
+        nirio_status_chain(_drv_proxy.poke(PCIE_ZPU_DATA_REG(addr), data), status);
+        if (nirio_status_not_fatal(status)) {
+            do {
+                boost::this_thread::sleep(boost::posix_time::microsec(50)); //Avoid flooding the bus
+                elapsed = boost::posix_time::microsec_clock::local_time() - start_time;
+                nirio_status_chain(_drv_proxy.peek(PCIE_ZPU_STATUS_REG(addr), reg_data), status);
+            } while (
+                nirio_status_not_fatal(status) &&
+                ((reg_data & (PCIE_ZPU_STATUS_BUSY | PCIE_ZPU_STATUS_SUSPENDED)) != 0) &&
+                elapsed.total_milliseconds() < READ_TIMEOUT_IN_MS);
+        }
+
+        if (nirio_status_fatal(status))
+            throw uhd::io_error("x300 fw poke32 - hardware IO error");
+        if (elapsed.total_milliseconds() > READ_TIMEOUT_IN_MS)
+            throw uhd::io_error("x300 fw poke32 - operation timed out");
+    }
+
+    virtual boost::uint32_t __peek32(const wb_addr_type addr)
+    {
+        nirio_status status = 0;
+        boost::uint32_t reg_data = 0xffffffff;
+        boost::posix_time::ptime start_time = boost::posix_time::microsec_clock::local_time();
+        boost::posix_time::time_duration elapsed;
+
+        nirio_status_chain(_drv_proxy.poke(PCIE_ZPU_READ_REG(addr), PCIE_ZPU_READ_START), status);
+        if (nirio_status_not_fatal(status)) {
+            do {
+                boost::this_thread::sleep(boost::posix_time::microsec(50)); //Avoid flooding the bus
+                elapsed = boost::posix_time::microsec_clock::local_time() - start_time;
+                nirio_status_chain(_drv_proxy.peek(PCIE_ZPU_STATUS_REG(addr), reg_data), status);
+            } while (
+                nirio_status_not_fatal(status) &&
+                ((reg_data & (PCIE_ZPU_STATUS_BUSY | PCIE_ZPU_STATUS_SUSPENDED)) != 0) &&
+                elapsed.total_milliseconds() < READ_TIMEOUT_IN_MS);
+        }
+        nirio_status_chain(_drv_proxy.peek(PCIE_ZPU_DATA_REG(addr), reg_data), status);
+
+        if (nirio_status_fatal(status))
+            throw uhd::io_error("x300 fw peek32 - hardware IO error");
+        if (elapsed.total_milliseconds() > READ_TIMEOUT_IN_MS)
+            throw uhd::io_error("x300 fw peek32 - operation timed out");
+
+        return reg_data;
+    }
+
+    virtual void __flush(void)
+    {
+        __peek32(0);
+    }
+
+private:
+    niriok_proxy& _drv_proxy;
+    static const uint32_t READ_TIMEOUT_IN_MS = 10;
+    static const uint32_t INIT_TIMEOUT_IN_MS = 5000;
+};
+
+wb_iface::sptr x300_make_ctrl_iface_enet(uhd::transport::udp_simple::sptr udp)
+{
+    return wb_iface::sptr(new x300_ctrl_iface_enet(udp));
+}
+
+wb_iface::sptr x300_make_ctrl_iface_pcie(niriok_proxy& drv_proxy)
+{
+    return wb_iface::sptr(new x300_ctrl_iface_pcie(drv_proxy));
+}
diff --git a/host/lib/usrp/x300/x300_fw_uart.cpp b/host/lib/usrp/x300/x300_fw_uart.cpp
new file mode 100644
index 000000000..943b2d9fa
--- /dev/null
+++ b/host/lib/usrp/x300/x300_fw_uart.cpp
@@ -0,0 +1,104 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "x300_impl.hpp"
+#include <uhd/types/wb_iface.hpp>
+#include "x300_regs.hpp"
+#include <uhd/utils/msg.hpp>
+#include <uhd/types/serial.hpp>
+#include <uhd/exception.hpp>
+#include <boost/format.hpp>
+#include <boost/foreach.hpp>
+#include <boost/thread/thread.hpp>
+
+using namespace uhd;
+
+struct x300_uart_iface : uart_iface
+{
+    x300_uart_iface(wb_iface::sptr iface):
+        rxoffset(0), txoffset(0), txword32(0), rxpool(0), txpool(0), poolsize(0)
+    {
+        _iface = iface;
+        rxoffset = _iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_UART_RX_INDEX));
+        txoffset = _iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_UART_TX_INDEX));
+        rxpool = _iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_UART_RX_ADDR));
+        txpool = _iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_UART_TX_ADDR));
+        poolsize = _iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_UART_WORDS32));
+        //this->write_uart("HELLO UART\n");
+        //this->read_uart(0.1);
+    }
+
+    void putchar(const char ch)
+    {
+        txoffset = (txoffset + 1) % (poolsize*4);
+        const int shift = ((txoffset%4) * 8);
+        if (shift == 0) txword32 = 0;
+        txword32 |= boost::uint32_t(ch) << shift;
+        _iface->poke32(SR_ADDR(txpool, txoffset/4), txword32);
+        _iface->poke32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_UART_TX_INDEX), txoffset);
+    }
+
+    void write_uart(const std::string &buff)
+    {
+        BOOST_FOREACH(const char ch, buff)
+        {
+            if (ch == '\n') this->putchar('\r');
+            this->putchar(ch);
+        }
+    }
+
+    int getchar(void)
+    {
+        if (_iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_UART_RX_INDEX)) != rxoffset)
+        {
+            const int shift = ((rxoffset%4) * 8);
+            const char ch = _iface->peek32(SR_ADDR(rxpool, rxoffset/4)) >> shift;
+            rxoffset = (rxoffset + 1) % (poolsize*4);
+            return ch;
+        }
+        return -1;
+    }
+
+    std::string read_uart(double timeout)
+    {
+        const boost::system_time exit_time = boost::get_system_time() + boost::posix_time::microseconds(long(timeout*1e6));
+        std::string buff;
+        while (true)
+        {
+            const int ch = this->getchar();
+            if (ch == -1)
+            {
+                if (boost::get_system_time() > exit_time) break;
+                boost::this_thread::sleep(boost::posix_time::milliseconds(1));
+                continue;
+            }
+            if (ch == '\r') continue;
+            buff += std::string(1, (char)ch);
+            if (ch == '\n') break;
+        }
+        //UHD_VAR(buff);
+        return buff;
+    }
+
+    wb_iface::sptr _iface;
+    boost::uint32_t rxoffset, txoffset, txword32, rxpool, txpool, poolsize;
+};
+
+uart_iface::sptr x300_make_uart_iface(wb_iface::sptr iface)
+{
+    return uart_iface::sptr(new x300_uart_iface(iface));
+}
diff --git a/host/lib/usrp/x300/x300_impl.cpp b/host/lib/usrp/x300/x300_impl.cpp
new file mode 100644
index 000000000..f62967018
--- /dev/null
+++ b/host/lib/usrp/x300/x300_impl.cpp
@@ -0,0 +1,1481 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "x300_impl.hpp"
+#include "x300_regs.hpp"
+#include "x300_lvbitx.hpp"
+#include "x310_lvbitx.hpp"
+#include <boost/algorithm/string.hpp>
+#include <boost/asio.hpp>
+#include "apply_corrections.hpp"
+#include <uhd/utils/static.hpp>
+#include <uhd/utils/msg.hpp>
+#include <uhd/utils/images.hpp>
+#include <uhd/utils/safe_call.hpp>
+#include <uhd/usrp/subdev_spec.hpp>
+#include <uhd/transport/if_addrs.hpp>
+#include <boost/foreach.hpp>
+#include <boost/bind.hpp>
+#include <boost/functional/hash.hpp>
+#include <boost/assign/list_of.hpp>
+#include <fstream>
+#include <uhd/transport/udp_zero_copy.hpp>
+#include <uhd/transport/nirio_zero_copy.hpp>
+#include <uhd/transport/nirio/niusrprio_session.h>
+#include <uhd/utils/platform.hpp>
+
+#define NIUSRPRIO_DEFAULT_RPC_PORT "5444"
+
+#define X300_REV(x) (x - "A" + 1)
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::transport;
+using namespace uhd::niusrprio;
+namespace asio = boost::asio;
+
+/***********************************************************************
+ * Discovery over the udp and pcie transport
+ **********************************************************************/
+static std::string get_fpga_option(wb_iface::sptr zpu_ctrl) {
+    //1G = {0:1G, 1:1G} w/ DRAM, HG = {0:1G, 1:10G} w/ DRAM, XG = {0:10G, 1:10G} w/ DRAM
+    //HGS = {0:1G, 1:10G} w/ SRAM, XGS = {0:10G, 1:10G} w/ SRAM
+
+    //In the default configuration, UHD does not support the HG and XG images so
+    //they are never autodetected.
+    bool eth0XG = (zpu_ctrl->peek32(SR_ADDR(SET0_BASE, ZPU_RB_ETH_TYPE0)) == 0x1);
+    bool eth1XG = (zpu_ctrl->peek32(SR_ADDR(SET0_BASE, ZPU_RB_ETH_TYPE1)) == 0x1);
+    return (eth0XG && eth1XG) ? "XGS" : (eth1XG ? "HGS" : "1G");
+}
+
+//@TODO: Refactor the find functions to collapse common code for ethernet and PCIe
+static device_addrs_t x300_find_with_addr(const device_addr_t &hint)
+{
+    udp_simple::sptr comm = udp_simple::make_broadcast(
+        hint["addr"], BOOST_STRINGIZE(X300_FW_COMMS_UDP_PORT));
+
+    //load request struct
+    x300_fw_comms_t request = x300_fw_comms_t();
+    request.flags = uhd::htonx<boost::uint32_t>(X300_FW_COMMS_FLAGS_ACK);
+    request.sequence = uhd::htonx<boost::uint32_t>(std::rand());
+
+    //send request
+    comm->send(asio::buffer(&request, sizeof(request)));
+
+    //loop for replies until timeout
+    device_addrs_t addrs;
+    while (true)
+    {
+        char buff[X300_FW_COMMS_MTU] = {};
+        const size_t nbytes = comm->recv(asio::buffer(buff), 0.050);
+        if (nbytes == 0) break;
+        const x300_fw_comms_t *reply = (const x300_fw_comms_t *)buff;
+        if (request.flags != reply->flags) break;
+        if (request.sequence != reply->sequence) break;
+        device_addr_t new_addr;
+        new_addr["type"] = "x300";
+        new_addr["addr"] = comm->get_recv_addr();
+
+        //Attempt to read the name from the EEPROM and perform filtering.
+        //This operation can throw due to compatibility mismatch.
+        try
+        {
+            wb_iface::sptr zpu_ctrl = x300_make_ctrl_iface_enet(udp_simple::make_connected(new_addr["addr"], BOOST_STRINGIZE(X300_FW_COMMS_UDP_PORT)));
+            if (x300_impl::is_claimed(zpu_ctrl)) continue; //claimed by another process
+            new_addr["fpga"] = get_fpga_option(zpu_ctrl);
+
+            i2c_core_100_wb32::sptr zpu_i2c = i2c_core_100_wb32::make(zpu_ctrl, I2C1_BASE);
+            i2c_iface::sptr eeprom16 = zpu_i2c->eeprom16();
+            const mboard_eeprom_t mb_eeprom(*eeprom16, "X300");
+            new_addr["name"] = mb_eeprom["name"];
+            new_addr["serial"] = mb_eeprom["serial"];
+            switch (x300_impl::get_mb_type_from_eeprom(mb_eeprom)) {
+                case x300_impl::USRP_X300_MB:
+                    new_addr["product"] = "X300";
+                    break;
+                case x300_impl::USRP_X310_MB:
+                    new_addr["product"] = "X310";
+                    break;
+                default:
+                    break;
+            }
+        }
+        catch(const std::exception &)
+        {
+            //set these values as empty string so the device may still be found
+            //and the filter's below can still operate on the discovered device
+            new_addr["name"] = "";
+            new_addr["serial"] = "";
+        }
+        //filter the discovered device below by matching optional keys
+        if (
+            (not hint.has_key("name")    or hint["name"]    == new_addr["name"]) and
+            (not hint.has_key("serial")  or hint["serial"]  == new_addr["serial"]) and
+            (not hint.has_key("product") or hint["product"] == new_addr["product"])
+        ){
+            addrs.push_back(new_addr);
+        }
+    }
+
+    return addrs;
+}
+
+static device_addrs_t x300_find_pcie(const device_addr_t &hint, bool explicit_query)
+{
+    std::string rpc_port_name(NIUSRPRIO_DEFAULT_RPC_PORT);
+    if (hint.has_key("niusrpriorpc_port")) {
+        rpc_port_name = hint["niusrpriorpc_port"];
+    }
+
+    device_addrs_t addrs;
+    niusrprio_session::device_info_vtr dev_info_vtr;
+    nirio_status status = niusrprio_session::enumerate(rpc_port_name, dev_info_vtr);
+    if (explicit_query) nirio_status_to_exception(status, "x300_find_pcie: Error enumerating NI-RIO devices.");
+
+    BOOST_FOREACH(niusrprio_session::device_info &dev_info, dev_info_vtr)
+    {
+        device_addr_t new_addr;
+        new_addr["type"] = "x300";
+        new_addr["resource"] = dev_info.resource_name;
+        std::string resource_d(dev_info.resource_name);
+        boost::to_upper(resource_d);
+
+        switch (x300_impl::get_mb_type_from_pcie(resource_d, rpc_port_name)) {
+            case x300_impl::USRP_X300_MB:
+                new_addr["product"] = "X300";
+                break;
+            case x300_impl::USRP_X310_MB:
+                new_addr["product"] = "X310";
+                break;
+            default:
+                continue;
+        }
+
+        niriok_proxy kernel_proxy;
+        kernel_proxy.open(dev_info.interface_path);
+
+        //Attempt to read the name from the EEPROM and perform filtering.
+        //This operation can throw due to compatibility mismatch.
+        try
+        {
+            //This call could throw an exception if the user is switching to using UHD
+            //after LabVIEW FPGA. In that case, skip reading the name and serial and pick
+            //a default FPGA flavor. During make, a new image will be loaded and everything
+            //will be OK
+            wb_iface::sptr zpu_ctrl = x300_make_ctrl_iface_pcie(kernel_proxy);
+            if (x300_impl::is_claimed(zpu_ctrl)) continue; //claimed by another process
+
+            //Attempt to autodetect the FPGA type
+            if (not hint.has_key("fpga")) {
+                new_addr["fpga"] = get_fpga_option(zpu_ctrl);
+            }
+
+            i2c_core_100_wb32::sptr zpu_i2c = i2c_core_100_wb32::make(zpu_ctrl, I2C1_BASE);
+            i2c_iface::sptr eeprom16 = zpu_i2c->eeprom16();
+            const mboard_eeprom_t mb_eeprom(*eeprom16, "X300");
+            new_addr["name"] = mb_eeprom["name"];
+            new_addr["serial"] = mb_eeprom["serial"];
+        }
+        catch(const std::exception &)
+        {
+            //set these values as empty string so the device may still be found
+            //and the filter's below can still operate on the discovered device
+            if (not hint.has_key("fpga")) {
+                new_addr["fpga"] = "HGS";
+            }
+            new_addr["name"] = "";
+            new_addr["serial"] = "";
+        }
+        kernel_proxy.close();
+
+        //filter the discovered device below by matching optional keys
+        std::string resource_i = hint.has_key("resource") ? hint["resource"] : "";
+        boost::to_upper(resource_i);
+
+        if (
+            (not hint.has_key("resource") or resource_i     == resource_d) and
+            (not hint.has_key("name")     or hint["name"]   == new_addr["name"]) and
+            (not hint.has_key("serial")   or hint["serial"] == new_addr["serial"]) and
+            (not hint.has_key("product") or hint["product"] == new_addr["product"])
+        ){
+            addrs.push_back(new_addr);
+        }
+    }
+    return addrs;
+}
+
+static device_addrs_t x300_find(const device_addr_t &hint_)
+{
+    //handle the multi-device discovery
+    device_addrs_t hints = separate_device_addr(hint_);
+    if (hints.size() > 1)
+    {
+        device_addrs_t found_devices;
+        std::string error_msg;
+        BOOST_FOREACH(const device_addr_t &hint_i, hints)
+        {
+            device_addrs_t found_devices_i = x300_find(hint_i);
+            if (found_devices_i.size() != 1) error_msg += str(boost::format(
+                "Could not resolve device hint \"%s\" to a single device."
+            ) % hint_i.to_string());
+            else found_devices.push_back(found_devices_i[0]);
+        }
+        if (found_devices.empty()) return device_addrs_t();
+        if (not error_msg.empty()) throw uhd::value_error(error_msg);
+
+        return device_addrs_t(1, combine_device_addrs(found_devices));
+    }
+
+    //initialize the hint for a single device case
+    UHD_ASSERT_THROW(hints.size() <= 1);
+    hints.resize(1); //in case it was empty
+    device_addr_t hint = hints[0];
+    device_addrs_t addrs;
+    if (hint.has_key("type") and hint["type"] != "x300") return addrs;
+
+
+    //use the address given
+    if (hint.has_key("addr"))
+    {
+        device_addrs_t reply_addrs;
+        try
+        {
+            reply_addrs = x300_find_with_addr(hint);
+        }
+        catch(const std::exception &ex)
+        {
+            UHD_MSG(error) << "X300 Network discovery error " << ex.what() << std::endl;
+        }
+        catch(...)
+        {
+            UHD_MSG(error) << "X300 Network discovery unknown error " << std::endl;
+        }
+        BOOST_FOREACH(const device_addr_t &reply_addr, reply_addrs)
+        {
+            device_addrs_t new_addrs = x300_find_with_addr(reply_addr);
+            addrs.insert(addrs.begin(), new_addrs.begin(), new_addrs.end());
+        }
+        return addrs;
+    }
+
+    if (!hint.has_key("resource"))
+    {
+        //otherwise, no address was specified, send a broadcast on each interface
+        BOOST_FOREACH(const if_addrs_t &if_addrs, get_if_addrs())
+        {
+            //avoid the loopback device
+            if (if_addrs.inet == asio::ip::address_v4::loopback().to_string()) continue;
+
+            //create a new hint with this broadcast address
+            device_addr_t new_hint = hint;
+            new_hint["addr"] = if_addrs.bcast;
+
+            //call discover with the new hint and append results
+            device_addrs_t new_addrs = x300_find(new_hint);
+            addrs.insert(addrs.begin(), new_addrs.begin(), new_addrs.end());
+        }
+    }
+
+    device_addrs_t pcie_addrs = x300_find_pcie(hint, hint.has_key("resource"));
+    if (not pcie_addrs.empty()) addrs.insert(addrs.end(), pcie_addrs.begin(), pcie_addrs.end());
+
+    return addrs;
+}
+
+/***********************************************************************
+ * Make
+ **********************************************************************/
+static device::sptr x300_make(const device_addr_t &device_addr)
+{
+    return device::sptr(new x300_impl(device_addr));
+}
+
+UHD_STATIC_BLOCK(register_x300_device)
+{
+    device::register_device(&x300_find, &x300_make);
+}
+
+static void x300_load_fw(wb_iface::sptr fw_reg_ctrl, const std::string &file_name)
+{
+    UHD_MSG(status) << "Loading firmware " << file_name << std::flush;
+
+    //load file into memory
+    std::ifstream fw_file(file_name.c_str());
+    boost::uint32_t fw_file_buff[X300_FW_NUM_BYTES/sizeof(boost::uint32_t)];
+    fw_file.read((char *)fw_file_buff, sizeof(fw_file_buff));
+    fw_file.close();
+
+    //Poke the fw words into the WB boot loader
+    fw_reg_ctrl->poke32(SR_ADDR(BOOT_LDR_BASE, BL_ADDRESS), 0);
+    for (size_t i = 0; i < X300_FW_NUM_BYTES; i+=sizeof(boost::uint32_t))
+    {
+        //@TODO: FIXME: Since x300_ctrl_iface acks each write and traps exceptions, the first try for the last word
+        //              written will print an error because it triggers a FW reload and fails to reply.
+        fw_reg_ctrl->poke32(SR_ADDR(BOOT_LDR_BASE, BL_DATA), uhd::byteswap(fw_file_buff[i/sizeof(boost::uint32_t)]));
+        if ((i & 0x1fff) == 0) UHD_MSG(status) << "." << std::flush;
+    }
+
+    UHD_MSG(status) << " done!" << std::endl;
+}
+
+x300_impl::x300_impl(const uhd::device_addr_t &dev_addr)
+{
+    UHD_MSG(status) << "X300 initialization sequence..." << std::endl;
+    _async_md.reset(new async_md_type(1000/*messages deep*/));
+    _tree = uhd::property_tree::make();
+    _tree->create<std::string>("/name").set("X-Series Device");
+    _sid_framer = 0;
+
+    const device_addrs_t device_args = separate_device_addr(dev_addr);
+    _mb.resize(device_args.size());
+    for (size_t i = 0; i < device_args.size(); i++)
+    {
+        this->setup_mb(i, device_args[i]);
+    }
+}
+
+void x300_impl::setup_mb(const size_t mb_i, const uhd::device_addr_t &dev_addr)
+{
+    const fs_path mb_path = "/mboards/"+boost::lexical_cast<std::string>(mb_i);
+    mboard_members_t &mb = _mb[mb_i];
+
+    mb.addr = dev_addr.has_key("resource") ? dev_addr["resource"] : dev_addr["addr"];
+    mb.xport_path = dev_addr.has_key("resource") ? "nirio" : "eth";
+    mb.if_pkt_is_big_endian = mb.xport_path != "nirio";
+
+    if (mb.xport_path == "nirio")
+    {
+        nirio_status status = 0;
+
+        std::string rpc_port_name(NIUSRPRIO_DEFAULT_RPC_PORT);
+        if (dev_addr.has_key("niusrpriorpc_port")) {
+            rpc_port_name = dev_addr["niusrpriorpc_port"];
+        }
+        UHD_MSG(status) << boost::format("Connecting to niusrpriorpc at localhost:%s...\n") % rpc_port_name;
+
+        //Instantiate the correct lvbitx object
+        nifpga_lvbitx::sptr lvbitx;
+        switch (get_mb_type_from_pcie(dev_addr["resource"], rpc_port_name)) {
+            case USRP_X300_MB:
+                lvbitx.reset(new x300_lvbitx(dev_addr["fpga"]));
+                break;
+            case USRP_X310_MB:
+                lvbitx.reset(new x310_lvbitx(dev_addr["fpga"]));
+                break;
+            default:
+                nirio_status_to_exception(status, "Motherboard detection error. Please ensure that you \
+                    have a valid USRP X3x0, NI USRP-294xR or NI USRP-295xR device and that all the device \
+                    driver have been loaded.");
+        }
+
+        //Load the lvbitx onto the device
+        UHD_MSG(status) << boost::format("Using LVBITX bitfile %s...\n") % lvbitx->get_bitfile_path();
+        mb.rio_fpga_interface.reset(new niusrprio_session(dev_addr["resource"], rpc_port_name));
+        nirio_status_chain(mb.rio_fpga_interface->open(lvbitx, dev_addr.has_key("download-fpga")), status);
+        nirio_status_to_exception(status, "x300_impl: Could not initialize RIO session.");
+
+        //Tell the quirks object which FIFOs carry TX stream data
+        const uint32_t tx_data_fifos[2] = {X300_RADIO_DEST_PREFIX_TX, X300_RADIO_DEST_PREFIX_TX + 3};
+        mb.rio_fpga_interface->get_kernel_proxy().get_rio_quirks().register_tx_streams(tx_data_fifos);
+    }
+
+    BOOST_FOREACH(const std::string &key, dev_addr.keys())
+    {
+        if (key.find("recv") != std::string::npos) mb.recv_args[key] = dev_addr[key];
+        if (key.find("send") != std::string::npos) mb.send_args[key] = dev_addr[key];
+    }
+
+    const std::vector<std::string> DB_NAMES = boost::assign::list_of("A")("B");
+
+    //create basic communication
+    UHD_MSG(status) << "Setup basic communication..." << std::endl;
+    if (mb.xport_path == "nirio") {
+        mb.zpu_ctrl = x300_make_ctrl_iface_pcie(mb.rio_fpga_interface->get_kernel_proxy());
+    } else {
+        mb.zpu_ctrl = x300_make_ctrl_iface_enet(udp_simple::make_connected(mb.addr,
+                    BOOST_STRINGIZE(X300_FW_COMMS_UDP_PORT)));
+    }
+
+    if (mb.xport_path == "eth")
+    {
+        mtu_result_t user_set;
+        user_set.recv_mtu = dev_addr.has_key("recv_frame_size") \
+            ? boost::lexical_cast<size_t>(dev_addr["recv_frame_size"]) \
+            : X300_ETH_DATA_FRAME_SIZE;
+        user_set.send_mtu = dev_addr.has_key("send_frame_size") \
+            ? boost::lexical_cast<size_t>(dev_addr["send_frame_size"]) \
+            : X300_ETH_DATA_FRAME_SIZE;
+
+        // Detect the MTU on the path to the USRP
+        mtu_result_t result;
+        try {
+            result = determine_mtu(mb.addr, user_set);
+        } catch(std::exception &e) {
+            UHD_MSG(error) << e.what() << std::endl;
+        }
+
+        #if defined UHD_PLATFORM_LINUX
+            const std::string mtu_tool("ip link");
+        #elif defined UHD_PLATFORM_WIN32
+            const std::string mtu_tool("netsh");
+        #else
+            const std::string mtu_tool("ifconfig");
+        #endif
+
+        if(result.recv_mtu < user_set.recv_mtu) {
+            UHD_MSG(warning)
+                << boost::format("The receive path contains entities that do not support MTUs >= one recv frame's size (%lu).")
+                % user_set.recv_mtu << std::endl
+                << boost::format("Please verify your NIC's MTU setting using '%s' or set the recv_frame_size argument.")
+                % mtu_tool << std::endl;
+        }
+
+        if(result.send_mtu < user_set.send_mtu) {
+            UHD_MSG(warning)
+                << boost::format("The send path contains entities that do not support MTUs >= one send frame's size (%lu).")
+                % user_set.send_mtu << std::endl
+                << boost::format("Please verify your NIC's MTU setting using '%s' or set the send_frame_size argument.")
+                % mtu_tool << std::endl;
+        }
+    }
+
+    mb.claimer_task = uhd::task::make(boost::bind(&x300_impl::claimer_loop, this, mb.zpu_ctrl));
+
+    //extract the FW path for the X300
+    //and live load fw over ethernet link
+    if (dev_addr.has_key("fw"))
+    {
+        const std::string x300_fw_image = find_image_path(
+            dev_addr.has_key("fw")? dev_addr["fw"] : X300_FW_FILE_NAME
+        );
+        x300_load_fw(mb.zpu_ctrl, x300_fw_image);
+    }
+
+    //check compat -- good place to do after conditional loading
+    this->check_fw_compat(mb_path, mb.zpu_ctrl);
+    this->check_fpga_compat(mb_path, mb.zpu_ctrl);
+
+    //low speed perif access
+    mb.zpu_spi = spi_core_3000::make(mb.zpu_ctrl, SR_ADDR(SET0_BASE, ZPU_SR_SPI),
+            SR_ADDR(SET0_BASE, ZPU_RB_SPI));
+    mb.zpu_i2c = i2c_core_100_wb32::make(mb.zpu_ctrl, I2C1_BASE);
+    mb.zpu_i2c->set_clock_rate(X300_BUS_CLOCK_RATE);
+
+    ////////////////////////////////////////////////////////////////////
+    // print network routes mapping
+    ////////////////////////////////////////////////////////////////////
+    /*
+    const uint32_t routes_addr = mb.zpu_ctrl->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_ROUTE_MAP_ADDR));
+    const uint32_t routes_len = mb.zpu_ctrl->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_ROUTE_MAP_LEN));
+    UHD_VAR(routes_len);
+    for (size_t i = 0; i < routes_len; i+=1)
+    {
+        const uint32_t node_addr = mb.zpu_ctrl->peek32(SR_ADDR(routes_addr, i*2+0));
+        const uint32_t nbor_addr = mb.zpu_ctrl->peek32(SR_ADDR(routes_addr, i*2+1));
+        if (node_addr != 0 and nbor_addr != 0)
+        {
+            UHD_MSG(status) << boost::format("%u: %s -> %s")
+                % i
+                % asio::ip::address_v4(node_addr).to_string()
+                % asio::ip::address_v4(nbor_addr).to_string()
+            << std::endl;
+        }
+    }
+    */
+
+    ////////////////////////////////////////////////////////////////////
+    // setup the mboard eeprom
+    ////////////////////////////////////////////////////////////////////
+    UHD_MSG(status) << "Loading values from EEPROM..." << std::endl;
+    i2c_iface::sptr eeprom16 = mb.zpu_i2c->eeprom16();
+    if (dev_addr.has_key("blank_eeprom"))
+    {
+        UHD_MSG(warning) << "Obliterating the motherboard EEPROM..." << std::endl;
+        eeprom16->write_eeprom(0x50, 0, byte_vector_t(256, 0xff));
+    }
+    const mboard_eeprom_t mb_eeprom(*eeprom16, "X300");
+    _tree->create<mboard_eeprom_t>(mb_path / "eeprom")
+        .set(mb_eeprom)
+        .subscribe(boost::bind(&x300_impl::set_mb_eeprom, this, mb.zpu_i2c, _1));
+
+    ////////////////////////////////////////////////////////////////////
+    // parse the product number
+    ////////////////////////////////////////////////////////////////////
+    std::string product_name = "X300?";
+    switch (get_mb_type_from_eeprom(mb_eeprom)) {
+        case USRP_X300_MB:
+            product_name = "X300";
+            break;
+        case USRP_X310_MB:
+            product_name = "X310";
+            break;
+        default:
+            break;
+    }
+    _tree->create<std::string>(mb_path / "name").set(product_name);
+    _tree->create<std::string>(mb_path / "codename").set("Yetti");
+
+    ////////////////////////////////////////////////////////////////////
+    // determine routing based on address match
+    ////////////////////////////////////////////////////////////////////
+    mb.router_dst_here = X300_XB_DST_E0; //some default if eeprom not match
+    if (mb.xport_path == "nirio") {
+        mb.router_dst_here = X300_XB_DST_PCI;
+    } else {
+        if (mb.addr == mb_eeprom["ip-addr0"]) mb.router_dst_here = X300_XB_DST_E0;
+        else if (mb.addr == mb_eeprom["ip-addr1"]) mb.router_dst_here = X300_XB_DST_E1;
+        else if (mb.addr == mb_eeprom["ip-addr2"]) mb.router_dst_here = X300_XB_DST_E0;
+        else if (mb.addr == mb_eeprom["ip-addr3"]) mb.router_dst_here = X300_XB_DST_E1;
+        else if (mb.addr == boost::asio::ip::address_v4(boost::uint32_t(X300_DEFAULT_IP_ETH0_1G)).to_string()) mb.router_dst_here = X300_XB_DST_E0;
+        else if (mb.addr == boost::asio::ip::address_v4(boost::uint32_t(X300_DEFAULT_IP_ETH1_1G)).to_string()) mb.router_dst_here = X300_XB_DST_E1;
+        else if (mb.addr == boost::asio::ip::address_v4(boost::uint32_t(X300_DEFAULT_IP_ETH0_10G)).to_string()) mb.router_dst_here = X300_XB_DST_E0;
+        else if (mb.addr == boost::asio::ip::address_v4(boost::uint32_t(X300_DEFAULT_IP_ETH1_10G)).to_string()) mb.router_dst_here = X300_XB_DST_E1;
+    }
+
+    ////////////////////////////////////////////////////////////////////
+    // read dboard eeproms
+    ////////////////////////////////////////////////////////////////////
+    for (size_t i = 0; i < 8; i++)
+    {
+        if (i == 0 or i == 2) continue; //not used
+        mb.db_eeproms[i].load(*mb.zpu_i2c, 0x50 | i);
+    }
+
+    ////////////////////////////////////////////////////////////////////
+    // create clock control objects
+    ////////////////////////////////////////////////////////////////////
+    UHD_MSG(status) << "Setup RF frontend clocking..." << std::endl;
+
+    // Init shadow and clock source; the device comes up with it's internal
+    // clock source before locking to something else (if requested).
+    mb.clock_control_regs__clock_source = 0;
+    mb.clock_control_regs__pps_select = 0;
+    mb.clock_control_regs__pps_out_enb = 0;
+    mb.clock_control_regs__tcxo_enb = 1;
+    mb.clock_control_regs__gpsdo_pwr = 1;
+    this->update_clock_source(mb, "internal");
+    this->update_clock_control(mb);
+
+    size_t hw_rev = 0;
+    if(mb_eeprom.has_key("revision") and not mb_eeprom["revision"].empty()) {
+        try {
+            hw_rev = boost::lexical_cast<size_t>(mb_eeprom["revision"]);
+        } catch(...) {
+            UHD_MSG(warning) << "Revision in EEPROM is invalid! Please reprogram your EEPROM." << std::endl;
+        }
+    } else {
+        UHD_MSG(warning) << "No revision detected MB EEPROM must be reprogrammed!" << std::endl;
+    }
+
+    if(hw_rev == 0) {
+        UHD_MSG(warning) << "Defaulting to X300 RevD Clock Settings. This will result in non-optimal lock times." << std::endl;
+        hw_rev = X300_REV("D");
+    }
+
+    mb.clock = x300_clock_ctrl::make(mb.zpu_spi,
+        1 /*slaveno*/,
+        hw_rev,
+        dev_addr.cast<double>("master_clock_rate", X300_DEFAULT_TICK_RATE),
+        dev_addr.cast<double>("system_ref_rate", X300_DEFAULT_SYSREF_RATE));
+
+    ////////////////////////////////////////////////////////////////////
+    // create clock properties
+    ////////////////////////////////////////////////////////////////////
+    _tree->create<double>(mb_path / "tick_rate")
+        .publish(boost::bind(&x300_clock_ctrl::get_master_clock_rate, mb.clock));
+
+    _tree->create<time_spec_t>(mb_path / "time" / "cmd");
+
+    UHD_MSG(status) << "Radio 1x clock:" << (mb.clock->get_master_clock_rate()/1e6)
+        << std::endl;
+
+    ////////////////////////////////////////////////////////////////////
+    // Create the GPSDO control
+    ////////////////////////////////////////////////////////////////////
+    static const boost::uint32_t dont_look_for_gpsdo = 0x1234abcdul;
+
+    //otherwise if not disabled, look for the internal GPSDO
+    if (mb.zpu_ctrl->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_GPSDO_STATUS)) != dont_look_for_gpsdo)
+    {
+        UHD_MSG(status) << "Detecting internal GPSDO.... " << std::flush;
+        try
+        {
+            mb.gps = gps_ctrl::make(x300_make_uart_iface(mb.zpu_ctrl));
+        }
+        catch(std::exception &e)
+        {
+            UHD_MSG(error) << "An error occurred making GPSDO control: " << e.what() << std::endl;
+        }
+        if (mb.gps and mb.gps->gps_detected())
+        {
+            BOOST_FOREACH(const std::string &name, mb.gps->get_sensors())
+            {
+                _tree->create<sensor_value_t>(mb_path / "sensors" / name)
+                    .publish(boost::bind(&gps_ctrl::get_sensor, mb.gps, name));
+            }
+        }
+        else
+        {
+            mb.zpu_ctrl->poke32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_GPSDO_STATUS), dont_look_for_gpsdo);
+        }
+    }
+
+    ////////////////////////////////////////////////////////////////////
+    //clear router?
+    ////////////////////////////////////////////////////////////////////
+    for (size_t i = 0; i < 512; i++) {
+        mb.zpu_ctrl->poke32(SR_ADDR(SETXB_BASE, i), 0);
+    }
+
+    ////////////////////////////////////////////////////////////////////
+    // setup radios
+    ////////////////////////////////////////////////////////////////////
+    UHD_MSG(status) << "Initialize Radio control..." << std::endl;
+    this->setup_radio(mb_i, 0, DB_NAMES[0]);
+    this->setup_radio(mb_i, 1, DB_NAMES[1]);
+
+    ////////////////////////////////////////////////////////////////////
+    // front panel gpio
+    ////////////////////////////////////////////////////////////////////
+    mb.fp_gpio = gpio_core_200::make(mb.radio_perifs[0].ctrl, TOREG(SR_FP_GPIO), RB32_FP_GPIO);
+    const std::vector<std::string> GPIO_ATTRS = boost::assign::list_of("CTRL")("DDR")("OUT")("ATR_0X")("ATR_RX")("ATR_TX")("ATR_XX");
+    BOOST_FOREACH(const std::string &attr, GPIO_ATTRS)
+    {
+        _tree->create<boost::uint32_t>(mb_path / "gpio" / "FP0" / attr)
+            .set(0)
+            .subscribe(boost::bind(&x300_impl::set_fp_gpio, this, mb.fp_gpio, attr, _1));
+    }
+    _tree->create<boost::uint32_t>(mb_path / "gpio" / "FP0" / "READBACK")
+        .publish(boost::bind(&x300_impl::get_fp_gpio, this, mb.fp_gpio, "READBACK"));
+
+    ////////////////////////////////////////////////////////////////////
+    // register the time keepers - only one can be the highlander
+    ////////////////////////////////////////////////////////////////////
+    _tree->create<time_spec_t>(mb_path / "time" / "now")
+        .publish(boost::bind(&time_core_3000::get_time_now, mb.radio_perifs[0].time64))
+        .subscribe(boost::bind(&time_core_3000::set_time_now, mb.radio_perifs[0].time64, _1))
+        .subscribe(boost::bind(&time_core_3000::set_time_now, mb.radio_perifs[1].time64, _1));
+    _tree->create<time_spec_t>(mb_path / "time" / "pps")
+        .publish(boost::bind(&time_core_3000::get_time_last_pps, mb.radio_perifs[0].time64))
+        .subscribe(boost::bind(&time_core_3000::set_time_next_pps, mb.radio_perifs[0].time64, _1))
+        .subscribe(boost::bind(&time_core_3000::set_time_next_pps, mb.radio_perifs[1].time64, _1));
+
+    ////////////////////////////////////////////////////////////////////
+    // setup time sources and properties
+    ////////////////////////////////////////////////////////////////////
+    _tree->create<std::string>(mb_path / "time_source" / "value")
+        .subscribe(boost::bind(&x300_impl::update_time_source, this, boost::ref(mb), _1));
+    static const std::vector<std::string> time_sources = boost::assign::list_of("internal")("external")("gpsdo");
+    _tree->create<std::vector<std::string> >(mb_path / "time_source" / "options").set(time_sources);
+
+    //setup the time output, default to ON
+    _tree->create<bool>(mb_path / "time_source" / "output")
+        .subscribe(boost::bind(&x300_impl::set_time_source_out, this, boost::ref(mb), _1))
+        .set(true);
+
+    ////////////////////////////////////////////////////////////////////
+    // setup clock sources and properties
+    ////////////////////////////////////////////////////////////////////
+    _tree->create<std::string>(mb_path / "clock_source" / "value")
+        .subscribe(boost::bind(&x300_impl::update_clock_source, this, boost::ref(mb), _1));
+
+    static const std::vector<std::string> clock_source_options = boost::assign::list_of("internal")("external")("gpsdo");
+    _tree->create<std::vector<std::string> >(mb_path / "clock_source" / "options").set(clock_source_options);
+
+    //setup external reference options. default to 10 MHz input reference
+    _tree->create<std::string>(mb_path / "clock_source" / "external");
+    static const std::vector<double> external_freq_options = boost::assign::list_of(10e6)(30.72e6)(200e6);
+    _tree->create<std::vector<double> >(mb_path / "clock_source" / "external" / "freq" / "options")
+        .set(external_freq_options);
+    _tree->create<double>(mb_path / "clock_source" / "external" / "value")
+        .set(mb.clock->get_sysref_clock_rate());
+    // FIXME the external clock source settings need to be more robust
+
+    //setup the clock output, default to ON
+    _tree->create<bool>(mb_path / "clock_source" / "output")
+        .subscribe(boost::bind(&x300_clock_ctrl::set_ref_out, mb.clock, _1));
+
+
+    ////////////////////////////////////////////////////////////////////
+    // create frontend mapping
+    ////////////////////////////////////////////////////////////////////
+    _tree->create<subdev_spec_t>(mb_path / "rx_subdev_spec")
+        .subscribe(boost::bind(&x300_impl::update_rx_subdev_spec, this, mb_i, _1));
+    _tree->create<subdev_spec_t>(mb_path / "tx_subdev_spec")
+        .subscribe(boost::bind(&x300_impl::update_tx_subdev_spec, this, mb_i, _1));
+
+    ////////////////////////////////////////////////////////////////////
+    // and do the misc mboard sensors
+    ////////////////////////////////////////////////////////////////////
+    _tree->create<sensor_value_t>(mb_path / "sensors" / "ref_locked")
+        .publish(boost::bind(&x300_impl::get_ref_locked, this, mb.zpu_ctrl));
+
+    ////////////////////////////////////////////////////////////////////
+    // create clock properties
+    ////////////////////////////////////////////////////////////////////
+    _tree->access<double>(mb_path / "tick_rate")
+        .subscribe(boost::bind(&x300_impl::set_tick_rate, this, boost::ref(mb), _1))
+        .subscribe(boost::bind(&x300_impl::update_tick_rate, this, boost::ref(mb), _1))
+        .set(mb.clock->get_master_clock_rate());
+
+    ////////////////////////////////////////////////////////////////////
+    // do some post-init tasks
+    ////////////////////////////////////////////////////////////////////
+    subdev_spec_t rx_fe_spec, tx_fe_spec;
+    rx_fe_spec.push_back(subdev_spec_pair_t("A",
+                _tree->list(mb_path / "dboards" / "A" / "rx_frontends").at(0)));
+    rx_fe_spec.push_back(subdev_spec_pair_t("B",
+                _tree->list(mb_path / "dboards" / "B" / "rx_frontends").at(0)));
+    tx_fe_spec.push_back(subdev_spec_pair_t("A",
+                _tree->list(mb_path / "dboards" / "A" / "tx_frontends").at(0)));
+    tx_fe_spec.push_back(subdev_spec_pair_t("B",
+                _tree->list(mb_path / "dboards" / "B" / "tx_frontends").at(0)));
+
+    _tree->access<subdev_spec_t>(mb_path / "rx_subdev_spec").set(rx_fe_spec);
+    _tree->access<subdev_spec_t>(mb_path / "tx_subdev_spec").set(tx_fe_spec);
+
+    //GPS installed: use external ref, time, and init time spec
+    if (mb.gps and mb.gps->gps_detected())
+    {
+        UHD_MSG(status) << "Setting references to the internal GPSDO" << std::endl;
+        _tree->access<std::string>(mb_path / "time_source" / "value").set("gpsdo");
+        _tree->access<std::string>(mb_path / "clock_source" / "value").set("gpsdo");
+        UHD_MSG(status) << "Initializing time to the internal GPSDO" << std::endl;
+        const time_t tp = time_t(mb.gps->get_sensor("gps_time").to_int()+1);
+        _tree->access<time_spec_t>(mb_path / "time" / "pps").set(time_spec_t(tp));
+    }
+    else
+    {
+        _tree->access<std::string>(mb_path / "time_source" / "value").set("external");
+        _tree->access<std::string>(mb_path / "clock_source" / "value").set("external");
+        boost::this_thread::sleep(boost::posix_time::milliseconds(100));
+        if (this->get_ref_locked(mb.zpu_ctrl).to_bool())
+        {
+            UHD_MSG(status) << "Setting references to external sources" << std::endl;
+        }
+        else
+        {
+            UHD_MSG(status) << "Setting references to internal sources" << std::endl;
+            _tree->access<std::string>(mb_path / "time_source" / "value").set("internal");
+            _tree->access<std::string>(mb_path / "clock_source" / "value").set("internal");
+        }
+    }
+}
+
+x300_impl::~x300_impl(void)
+{
+    try
+    {
+        BOOST_FOREACH(mboard_members_t &mb, _mb)
+        {
+            mb.radio_perifs[0].ctrl->poke32(TOREG(SR_MISC_OUTS), (1 << 2)); //disable/reset ADC/DAC
+            mb.radio_perifs[1].ctrl->poke32(TOREG(SR_MISC_OUTS), (1 << 2)); //disable/reset ADC/DAC
+
+            //kill the claimer task and unclaim the device
+            mb.claimer_task.reset();
+            mb.zpu_ctrl->poke32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_CLAIM_TIME), 0);
+            mb.zpu_ctrl->poke32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_CLAIM_SRC), 0);
+        }
+    }
+    catch(...)
+    {
+        UHD_SAFE_CALL(throw;)
+    }
+}
+
+static void check_adc(wb_iface::sptr iface, const boost::uint32_t val)
+{
+    boost::uint32_t adc_rb = iface->peek32(RB32_RX);
+    adc_rb ^= 0xfffc0000; //adapt for I inversion in FPGA
+    //UHD_MSG(status) << "adc_rb " << std::hex << adc_rb << "  val " << std::hex << val << std::endl;
+    UHD_ASSERT_THROW(adc_rb == val);
+}
+
+void x300_impl::setup_radio(const size_t mb_i, const size_t i, const std::string &db_name)
+{
+    const fs_path mb_path = "/mboards/"+boost::lexical_cast<std::string>(mb_i);
+    mboard_members_t &mb = _mb[mb_i];
+    radio_perifs_t &perif = mb.radio_perifs[i];
+    const size_t dspno = i;
+
+    ////////////////////////////////////////////////////////////////////
+    // radio control
+    ////////////////////////////////////////////////////////////////////
+    uint8_t dest = (i == 0)? X300_XB_DST_R0 : X300_XB_DST_R1;
+    boost::uint32_t ctrl_sid;
+    both_xports_t xport = this->make_transport(mb_i, dest, X300_RADIO_DEST_PREFIX_CTRL, device_addr_t(), ctrl_sid);
+    perif.ctrl = radio_ctrl_core_3000::make(mb.if_pkt_is_big_endian, xport.recv, xport.send, ctrl_sid, db_name);
+    perif.ctrl->poke32(TOREG(SR_MISC_OUTS), (1 << 2)); //reset adc + dac
+    perif.ctrl->poke32(TOREG(SR_MISC_OUTS),  (1 << 1) | (1 << 0)); //out of reset + dac enable
+
+    this->register_loopback_self_test(perif.ctrl);
+
+    perif.spi = spi_core_3000::make(perif.ctrl, TOREG(SR_SPI), RB32_SPI);
+    perif.adc = x300_adc_ctrl::make(perif.spi, DB_ADC_SEN);
+    perif.dac = x300_dac_ctrl::make(perif.spi, DB_DAC_SEN, mb.clock->get_master_clock_rate());
+    perif.leds = gpio_core_200_32wo::make(perif.ctrl, TOREG(SR_LEDS));
+
+    _tree->access<time_spec_t>(mb_path / "time" / "cmd")
+        .subscribe(boost::bind(&radio_ctrl_core_3000::set_time, perif.ctrl, _1));
+    _tree->access<double>(mb_path / "tick_rate")
+        .subscribe(boost::bind(&radio_ctrl_core_3000::set_tick_rate, perif.ctrl, _1));
+
+    ////////////////////////////////////////////////////////////////
+    // ADC self test
+    ////////////////////////////////////////////////////////////////
+    perif.adc->set_test_word("ones", "ones"); check_adc(perif.ctrl, 0xfffcfffc);
+    perif.adc->set_test_word("zeros", "zeros"); check_adc(perif.ctrl, 0x00000000);
+    perif.adc->set_test_word("ones", "zeros"); check_adc(perif.ctrl, 0xfffc0000);
+    perif.adc->set_test_word("zeros", "ones"); check_adc(perif.ctrl, 0x0000fffc);
+    for (size_t k = 0; k < 14; k++)
+    {
+        perif.adc->set_test_word("zeros", "custom", 1 << k);
+        check_adc(perif.ctrl, 1 << (k+2));
+    }
+    for (size_t k = 0; k < 14; k++)
+    {
+        perif.adc->set_test_word("custom", "zeros", 1 << k);
+        check_adc(perif.ctrl, 1 << (k+18));
+    }
+    perif.adc->set_test_word("normal", "normal");
+
+    ////////////////////////////////////////////////////////////////
+    // Sync DAC's for MIMO
+    ////////////////////////////////////////////////////////////////
+    UHD_MSG(status) << "Sync DAC's." << std::endl;
+    perif.dac->arm_dac_sync();               // Put DAC into data Sync mode
+    perif.ctrl->poke32(TOREG(SR_DACSYNC), 0x1);  // Arm FRAMEP/N sync pulse
+
+
+    ////////////////////////////////////////////////////////////////
+    // create codec control objects
+    ////////////////////////////////////////////////////////////////
+    _tree->create<int>(mb_path / "rx_codecs" / db_name / "gains"); //phony property so this dir exists
+    _tree->create<int>(mb_path / "tx_codecs" / db_name / "gains"); //phony property so this dir exists
+    _tree->create<std::string>(mb_path / "rx_codecs" / db_name / "name").set("ads62p48");
+    _tree->create<std::string>(mb_path / "tx_codecs" / db_name / "name").set("ad9146");
+
+    _tree->create<meta_range_t>(mb_path / "rx_codecs" / db_name / "gains" / "digital" / "range").set(meta_range_t(0, 6.0, 0.5));
+    _tree->create<double>(mb_path / "rx_codecs" / db_name / "gains" / "digital" / "value")
+        .subscribe(boost::bind(&x300_adc_ctrl::set_gain, perif.adc, _1)).set(0);
+
+    ////////////////////////////////////////////////////////////////////
+    // front end corrections
+    ////////////////////////////////////////////////////////////////////
+    perif.rx_fe = rx_frontend_core_200::make(perif.ctrl, TOREG(SR_RX_FRONT));
+    const fs_path rx_fe_path = mb_path / "rx_frontends" / db_name;
+    _tree->create<std::complex<double> >(rx_fe_path / "dc_offset" / "value")
+        .coerce(boost::bind(&rx_frontend_core_200::set_dc_offset, perif.rx_fe, _1))
+        .set(std::complex<double>(0.0, 0.0));
+    _tree->create<bool>(rx_fe_path / "dc_offset" / "enable")
+        .subscribe(boost::bind(&rx_frontend_core_200::set_dc_offset_auto, perif.rx_fe, _1))
+        .set(true);
+    _tree->create<std::complex<double> >(rx_fe_path / "iq_balance" / "value")
+        .subscribe(boost::bind(&rx_frontend_core_200::set_iq_balance, perif.rx_fe, _1))
+        .set(std::complex<double>(0.0, 0.0));
+
+    perif.tx_fe = tx_frontend_core_200::make(perif.ctrl, TOREG(SR_TX_FRONT));
+    const fs_path tx_fe_path = mb_path / "tx_frontends" / db_name;
+    _tree->create<std::complex<double> >(tx_fe_path / "dc_offset" / "value")
+        .coerce(boost::bind(&tx_frontend_core_200::set_dc_offset, perif.tx_fe, _1))
+        .set(std::complex<double>(0.0, 0.0));
+    _tree->create<std::complex<double> >(tx_fe_path / "iq_balance" / "value")
+        .subscribe(boost::bind(&tx_frontend_core_200::set_iq_balance, perif.tx_fe, _1))
+        .set(std::complex<double>(0.0, 0.0));
+
+
+
+    ////////////////////////////////////////////////////////////////////
+    // create rx dsp control objects
+    ////////////////////////////////////////////////////////////////////
+    perif.framer = rx_vita_core_3000::make(perif.ctrl, TOREG(SR_RX_CTRL));
+    perif.ddc = rx_dsp_core_3000::make(perif.ctrl, TOREG(SR_RX_DSP));
+    perif.ddc->set_link_rate(10e9/8); //whatever
+    _tree->access<double>(mb_path / "tick_rate")
+        .subscribe(boost::bind(&rx_vita_core_3000::set_tick_rate, perif.framer, _1))
+        .subscribe(boost::bind(&rx_dsp_core_3000::set_tick_rate, perif.ddc, _1));
+    const fs_path rx_dsp_path = mb_path / "rx_dsps" / str(boost::format("%u") % dspno);
+    _tree->create<meta_range_t>(rx_dsp_path / "rate" / "range")
+        .publish(boost::bind(&rx_dsp_core_3000::get_host_rates, perif.ddc));
+    _tree->create<double>(rx_dsp_path / "rate" / "value")
+        .coerce(boost::bind(&rx_dsp_core_3000::set_host_rate, perif.ddc, _1))
+        .subscribe(boost::bind(&x300_impl::update_rx_samp_rate, this, boost::ref(mb), dspno, _1))
+        .set(1e6);
+    _tree->create<double>(rx_dsp_path / "freq" / "value")
+        .coerce(boost::bind(&rx_dsp_core_3000::set_freq, perif.ddc, _1))
+        .set(0.0);
+    _tree->create<meta_range_t>(rx_dsp_path / "freq" / "range")
+        .publish(boost::bind(&rx_dsp_core_3000::get_freq_range, perif.ddc));
+    _tree->create<stream_cmd_t>(rx_dsp_path / "stream_cmd")
+        .subscribe(boost::bind(&rx_vita_core_3000::issue_stream_command, perif.framer, _1));
+
+    ////////////////////////////////////////////////////////////////////
+    // create tx dsp control objects
+    ////////////////////////////////////////////////////////////////////
+    perif.deframer = tx_vita_core_3000::make(perif.ctrl, TOREG(SR_TX_CTRL));
+    perif.duc = tx_dsp_core_3000::make(perif.ctrl, TOREG(SR_TX_DSP));
+    perif.duc->set_link_rate(10e9/8); //whatever
+    _tree->access<double>(mb_path / "tick_rate")
+        .subscribe(boost::bind(&tx_vita_core_3000::set_tick_rate, perif.deframer, _1))
+        .subscribe(boost::bind(&tx_dsp_core_3000::set_tick_rate, perif.duc, _1));
+    const fs_path tx_dsp_path = mb_path / "tx_dsps" / str(boost::format("%u") % dspno);
+    _tree->create<meta_range_t>(tx_dsp_path / "rate" / "range")
+        .publish(boost::bind(&tx_dsp_core_3000::get_host_rates, perif.duc));
+    _tree->create<double>(tx_dsp_path / "rate" / "value")
+        .coerce(boost::bind(&tx_dsp_core_3000::set_host_rate, perif.duc, _1))
+        .subscribe(boost::bind(&x300_impl::update_tx_samp_rate, this, boost::ref(mb), dspno, _1))
+        .set(1e6);
+    _tree->create<double>(tx_dsp_path / "freq" / "value")
+        .coerce(boost::bind(&tx_dsp_core_3000::set_freq, perif.duc, _1))
+        .set(0.0);
+    _tree->create<meta_range_t>(tx_dsp_path / "freq" / "range")
+        .publish(boost::bind(&tx_dsp_core_3000::get_freq_range, perif.duc));
+
+    ////////////////////////////////////////////////////////////////////
+    // create time control objects
+    ////////////////////////////////////////////////////////////////////
+    time_core_3000::readback_bases_type time64_rb_bases;
+    time64_rb_bases.rb_now = RB64_TIME_NOW;
+    time64_rb_bases.rb_pps = RB64_TIME_PPS;
+    perif.time64 = time_core_3000::make(perif.ctrl, TOREG(SR_TIME), time64_rb_bases);
+
+    ////////////////////////////////////////////////////////////////////
+    // create RF frontend interfacing
+    ////////////////////////////////////////////////////////////////////
+    const size_t j = (db_name == "B")? 0x2 : 0x0;
+    _tree->create<dboard_eeprom_t>(mb_path / "dboards" / db_name / "rx_eeprom")
+        .set(mb.db_eeproms[X300_DB0_RX_EEPROM | j])
+        .subscribe(boost::bind(&x300_impl::set_db_eeprom, this, mb.zpu_i2c, (0x50 | X300_DB0_RX_EEPROM | j), _1));
+    _tree->create<dboard_eeprom_t>(mb_path / "dboards" / db_name / "tx_eeprom")
+        .set(mb.db_eeproms[X300_DB0_TX_EEPROM | j])
+        .subscribe(boost::bind(&x300_impl::set_db_eeprom, this, mb.zpu_i2c, (0x50 | X300_DB0_TX_EEPROM | j), _1));
+    _tree->create<dboard_eeprom_t>(mb_path / "dboards" / db_name / "gdb_eeprom")
+        .set(mb.db_eeproms[X300_DB0_GDB_EEPROM | j])
+        .subscribe(boost::bind(&x300_impl::set_db_eeprom, this, mb.zpu_i2c, (0x50 | X300_DB0_GDB_EEPROM | j), _1));
+
+    //create a new dboard interface
+    x300_dboard_iface_config_t db_config;
+    db_config.gpio = gpio_core_200::make(perif.ctrl, TOREG(SR_GPIO), RB32_GPIO);
+    db_config.spi = perif.spi;
+    db_config.rx_spi_slaveno = DB_RX_SEN;
+    db_config.tx_spi_slaveno = DB_TX_SEN;
+    db_config.i2c = mb.zpu_i2c;
+    db_config.clock = mb.clock;
+    db_config.which_rx_clk = (db_name == "A")? X300_CLOCK_WHICH_DB0_RX : X300_CLOCK_WHICH_DB1_RX;
+    db_config.which_tx_clk = (db_name == "A")? X300_CLOCK_WHICH_DB0_TX : X300_CLOCK_WHICH_DB1_TX;
+    db_config.dboard_slot = (db_name == "A")? 0 : 1;
+    _dboard_ifaces[db_name] = x300_make_dboard_iface(db_config);
+
+    //create a new dboard manager
+    _tree->create<dboard_iface::sptr>(mb_path / "dboards" / db_name / "iface").set(_dboard_ifaces[db_name]);
+    _dboard_managers[db_name] = dboard_manager::make(
+        mb.db_eeproms[X300_DB0_RX_EEPROM | j].id,
+        mb.db_eeproms[X300_DB0_TX_EEPROM | j].id,
+        mb.db_eeproms[X300_DB0_GDB_EEPROM | j].id,
+        _dboard_ifaces[db_name],
+        _tree->subtree(mb_path / "dboards" / db_name)
+    );
+
+    //now that dboard is created -- register into rx antenna event
+    const std::string fe_name = _tree->list(mb_path / "dboards" / db_name / "rx_frontends").front();
+    _tree->access<std::string>(mb_path / "dboards" / db_name / "rx_frontends" / fe_name / "antenna" / "value")
+        .subscribe(boost::bind(&x300_impl::update_atr_leds, this, mb.radio_perifs[i].leds, _1));
+    this->update_atr_leds(mb.radio_perifs[i].leds, ""); //init anyway, even if never called
+
+    //bind frontend corrections to the dboard freq props
+    const fs_path db_rx_fe_path = mb_path / "dboards" / db_name / "rx_frontends";
+    BOOST_FOREACH(const std::string &name, _tree->list(db_rx_fe_path))
+    {
+        _tree->access<double>(db_rx_fe_path / name / "freq" / "value")
+            .subscribe(boost::bind(&x300_impl::set_rx_fe_corrections, this, mb_path, db_name, _1));
+    }
+}
+
+void x300_impl::set_rx_fe_corrections(const uhd::fs_path &mb_path, const std::string &fe_name, const double lo_freq)
+{
+    apply_rx_fe_corrections(this->get_tree()->subtree(mb_path), fe_name, lo_freq);
+}
+
+boost::uint32_t get_pcie_dma_channel(boost::uint8_t destination, boost::uint8_t prefix)
+{
+    static const boost::uint32_t RADIO_GRP_SIZE = 3;
+    static const boost::uint32_t RADIO0_GRP     = 0;
+    static const boost::uint32_t RADIO1_GRP     = 1;
+
+    boost::uint32_t radio_grp = (destination == X300_XB_DST_R0) ? RADIO0_GRP : RADIO1_GRP;
+    return ((radio_grp * RADIO_GRP_SIZE) + prefix);
+}
+
+
+x300_impl::both_xports_t x300_impl::make_transport(
+    const size_t mb_index,
+    const uint8_t& destination,
+    const uint8_t& prefix,
+    const uhd::device_addr_t& args,
+    boost::uint32_t& sid
+)
+{
+    mboard_members_t &mb = _mb[mb_index];
+    const std::string& addr = mb.addr;
+    const std::string& xport_path = mb.xport_path;
+    both_xports_t xports;
+
+    sid_config_t config;
+    config.router_addr_there    = X300_DEVICE_THERE;
+    config.dst_prefix           = prefix;
+    config.router_dst_there     = destination;
+    config.router_dst_here      = mb.router_dst_here;
+    sid = this->allocate_sid(mb, config);
+
+    static const uhd::device_addr_t DEFAULT_XPORT_ARGS;
+
+    const uhd::device_addr_t& xport_args =
+        (prefix != X300_RADIO_DEST_PREFIX_CTRL) ? args : DEFAULT_XPORT_ARGS;
+
+    zero_copy_xport_params default_buff_args;
+    if (xport_path == "nirio") {
+        default_buff_args.send_frame_size =
+            (prefix == X300_RADIO_DEST_PREFIX_TX) ? X300_PCIE_DATA_FRAME_SIZE : X300_PCIE_MSG_FRAME_SIZE;
+        default_buff_args.recv_frame_size =
+            (prefix == X300_RADIO_DEST_PREFIX_RX) ? X300_PCIE_DATA_FRAME_SIZE : X300_PCIE_MSG_FRAME_SIZE;
+        default_buff_args.num_send_frames =
+            (prefix == X300_RADIO_DEST_PREFIX_TX) ? X300_PCIE_DATA_NUM_FRAMES : X300_PCIE_MSG_NUM_FRAMES;
+        default_buff_args.num_recv_frames =
+            (prefix == X300_RADIO_DEST_PREFIX_RX) ? X300_PCIE_DATA_NUM_FRAMES : X300_PCIE_MSG_NUM_FRAMES;
+
+        xports.recv = nirio_zero_copy::make(
+            mb.rio_fpga_interface, get_pcie_dma_channel(destination, prefix), default_buff_args, xport_args);
+        xports.send = xports.recv;
+
+        //For the nirio transport, buffer size is depends on the frame size and num frames
+        xports.recv_buff_size = xports.recv->get_num_recv_frames() * xports.recv->get_recv_frame_size();
+        xports.send_buff_size = xports.send->get_num_send_frames() * xports.send->get_send_frame_size();
+    } else {
+
+        default_buff_args.send_frame_size =
+            (prefix == X300_RADIO_DEST_PREFIX_TX) ? X300_ETH_DATA_FRAME_SIZE : X300_ETH_MSG_FRAME_SIZE;
+        default_buff_args.recv_frame_size =
+            (prefix == X300_RADIO_DEST_PREFIX_RX) ? X300_ETH_DATA_FRAME_SIZE : X300_ETH_MSG_FRAME_SIZE;
+        default_buff_args.num_send_frames =
+            (prefix == X300_RADIO_DEST_PREFIX_TX) ? X300_ETH_DATA_NUM_FRAMES : X300_ETH_MSG_NUM_FRAMES;
+        default_buff_args.num_recv_frames =
+            (prefix == X300_RADIO_DEST_PREFIX_RX) ? X300_ETH_DATA_NUM_FRAMES : X300_ETH_MSG_NUM_FRAMES;
+
+        //make a new transport - fpga has no idea how to talk to use on this yet
+        udp_zero_copy::buff_params buff_params;
+        xports.recv = udp_zero_copy::make(addr, BOOST_STRINGIZE(X300_VITA_UDP_PORT), default_buff_args, buff_params, xport_args);
+        xports.send = xports.recv;
+
+        //For the UDP transport the buffer size if the size of the socket buffer in the kernel
+        xports.recv_buff_size = buff_params.recv_buff_size;
+        xports.send_buff_size = buff_params.send_buff_size;
+    }
+
+    //always program the framer if this is a socket, even its caching was used
+    if (xport_path != "nirio")
+    {
+        //clear the ethernet dispatcher's udp port
+        //NOT clearing this, the dispatcher is now intelligent
+        //_zpu_ctrl->poke32(SR_ADDR(SET0_BASE, (ZPU_SR_ETHINT0+8+3)), 0);
+
+        //send a mini packet with SID into the ZPU
+        //ZPU will reprogram the ethernet framer
+        UHD_LOG << "programming packet for new xport on "
+            << addr << std::hex << "sid 0x" << sid << std::dec << std::endl;
+        //YES, get a __send__ buffer from the __recv__ socket
+        //-- this is the only way to program the framer for recv:
+        managed_send_buffer::sptr buff = xports.recv->get_send_buff();
+        buff->cast<boost::uint32_t *>()[0] = 0; //eth dispatch looks for != 0
+        buff->cast<boost::uint32_t *>()[1] = uhd::htonx(sid);
+        buff->commit(8);
+        buff.reset();
+
+        //reprogram the ethernet dispatcher's udp port (should be safe to always set)
+        UHD_LOG << "reprogram the ethernet dispatcher's udp port" << std::endl;
+        mb.zpu_ctrl->poke32(SR_ADDR(SET0_BASE, (ZPU_SR_ETHINT0+8+3)), X300_VITA_UDP_PORT);
+        mb.zpu_ctrl->poke32(SR_ADDR(SET0_BASE, (ZPU_SR_ETHINT1+8+3)), X300_VITA_UDP_PORT);
+
+        //Do a peek to an arbitrary address to guarantee that the
+        //ethernet framer has been programmed before we return.
+        mb.zpu_ctrl->peek32(0);
+    }
+    return xports;
+}
+
+
+boost::uint32_t x300_impl::allocate_sid(mboard_members_t &mb, const sid_config_t &config)
+{
+    const std::string &xport_path = mb.xport_path;
+    const boost::uint32_t stream = (config.dst_prefix | (config.router_dst_there << 2)) & 0xff;
+
+    const boost::uint32_t sid = 0
+        | (X300_DEVICE_HERE << 24)
+        | (_sid_framer << 16)
+        | (config.router_addr_there << 8)
+        | (stream << 0)
+    ;
+    UHD_LOG << std::hex
+        << " sid 0x" << sid
+        << " framer 0x" << _sid_framer
+        << " stream 0x" << stream
+        << " router_dst_there 0x" << int(config.router_dst_there)
+        << " router_addr_there 0x" << int(config.router_addr_there)
+        << std::dec << std::endl;
+
+    // Program the X300 to recognise it's own local address.
+    mb.zpu_ctrl->poke32(SR_ADDR(SET0_BASE, ZPU_SR_XB_LOCAL), config.router_addr_there);
+    // Program CAM entry for outgoing packets matching a X300 resource (for example a Radio)
+    // This type of packet does matches the XB_LOCAL address and is looked up in the upper half of the CAM
+    mb.zpu_ctrl->poke32(SR_ADDR(SETXB_BASE, 256 + (stream)), config.router_dst_there);
+    // Program CAM entry for returning packets to us (for example GR host via Eth0)
+    // This type of packet does not match the XB_LOCAL address and is looked up in the lower half of the CAM
+    mb.zpu_ctrl->poke32(SR_ADDR(SETXB_BASE, 0 + (X300_DEVICE_HERE)), config.router_dst_here);
+
+    if (xport_path == "nirio") {
+        uint32_t router_config_word = ((_sid_framer & 0xff) << 16) |                                    //Return SID
+                                      get_pcie_dma_channel(config.router_dst_there, config.dst_prefix); //Dest
+        mb.rio_fpga_interface->get_kernel_proxy().poke(PCIE_ROUTER_REG(0), router_config_word);
+    }
+
+    UHD_LOG << std::hex
+        << "done router config for sid 0x" << sid
+        << std::dec << std::endl;
+
+    //increment for next setup
+    _sid_framer++;
+
+    return sid;
+}
+
+void x300_impl::update_atr_leds(gpio_core_200_32wo::sptr leds, const std::string &rx_ant)
+{
+    const bool is_txrx = (rx_ant == "TX/RX");
+    const int rx_led = (1 << 2);
+    const int txrx_led = (1 << 1);
+    const int tx_led = (1 << 0);
+    leds->set_atr_reg(dboard_iface::ATR_REG_IDLE, 0);
+    leds->set_atr_reg(dboard_iface::ATR_REG_RX_ONLY, is_txrx? txrx_led : rx_led);
+    leds->set_atr_reg(dboard_iface::ATR_REG_TX_ONLY, tx_led);
+    leds->set_atr_reg(dboard_iface::ATR_REG_FULL_DUPLEX, rx_led | tx_led);
+}
+
+void x300_impl::set_tick_rate(mboard_members_t &mb, const double rate)
+{
+    BOOST_FOREACH(radio_perifs_t &perif, mb.radio_perifs)
+        perif.time64->set_tick_rate(rate);
+}
+
+void x300_impl::register_loopback_self_test(wb_iface::sptr iface)
+{
+    bool test_fail = false;
+    UHD_MSG(status) << "Performing register loopback test... " << std::flush;
+    size_t hash = time(NULL);
+    for (size_t i = 0; i < 100; i++)
+    {
+        boost::hash_combine(hash, i);
+        iface->poke32(TOREG(SR_TEST), boost::uint32_t(hash));
+        test_fail = iface->peek32(RB32_TEST) != boost::uint32_t(hash);
+        if (test_fail) break; //exit loop on any failure
+    }
+    UHD_MSG(status) << ((test_fail)? " fail" : "pass") << std::endl;
+}
+
+void x300_impl::set_time_source_out(mboard_members_t &mb, const bool enb)
+{
+    mb.clock_control_regs__pps_out_enb = enb? 1 : 0;
+    this->update_clock_control(mb);
+}
+
+void x300_impl::update_clock_control(mboard_members_t &mb)
+{
+    const size_t reg = mb.clock_control_regs__clock_source
+        | (mb.clock_control_regs__pps_select << 2)
+        | (mb.clock_control_regs__pps_out_enb << 3)
+        | (mb.clock_control_regs__tcxo_enb << 4)
+        | (mb.clock_control_regs__gpsdo_pwr << 5)
+    ;
+    mb.zpu_ctrl->poke32(SR_ADDR(SET0_BASE, ZPU_SR_CLOCK_CTRL), reg);
+}
+
+void x300_impl::update_clock_source(mboard_members_t &mb, const std::string &source)
+{
+    mb.clock_control_regs__clock_source = 0;
+    if (source == "internal") {
+        mb.clock_control_regs__clock_source = 0x2;
+
+        mb.clock_control_regs__tcxo_enb = (source == "internal")? 1 : 0;
+    } else if (source == "external") {
+        mb.clock_control_regs__clock_source = 0x0;
+    } else if (source == "gpsdo") {
+        mb.clock_control_regs__clock_source = 0x3;
+    } else {
+        throw uhd::key_error("update_clock_source: unknown source: " + source);
+    }
+
+    this->update_clock_control(mb);
+}
+
+void x300_impl::update_time_source(mboard_members_t &mb, const std::string &source)
+{
+    if (source == "internal") {
+        // no action needed
+    } else if (source == "external") {
+        mb.clock_control_regs__pps_select = (source == "external")? 1 : 0;
+    } else if (source == "gpsdo") {
+        // no action needed
+    } else {
+        throw uhd::key_error("update_time_source: unknown source: " + source);
+    }
+
+    this->update_clock_control(mb);
+}
+
+sensor_value_t x300_impl::get_ref_locked(wb_iface::sptr ctrl)
+{
+    const bool lock = (ctrl->peek32(SR_ADDR(SET0_BASE, ZPU_RB_CLK_STATUS)) & (1 << 2)) != 0;
+    return sensor_value_t("Ref", lock, "locked", "unlocked");
+}
+
+void x300_impl::set_db_eeprom(i2c_iface::sptr i2c, const size_t addr, const uhd::usrp::dboard_eeprom_t &db_eeprom)
+{
+    db_eeprom.store(*i2c, addr);
+}
+
+void x300_impl::set_mb_eeprom(i2c_iface::sptr i2c, const mboard_eeprom_t &mb_eeprom)
+{
+    i2c_iface::sptr eeprom16 = i2c->eeprom16();
+    mb_eeprom.commit(*eeprom16, "X300");
+}
+
+boost::uint32_t x300_impl::get_fp_gpio(gpio_core_200::sptr gpio, const std::string &)
+{
+    return boost::uint32_t(gpio->read_gpio(dboard_iface::UNIT_RX));
+}
+
+void x300_impl::set_fp_gpio(gpio_core_200::sptr gpio, const std::string &attr, const boost::uint32_t value)
+{
+    if (attr == "CTRL") return gpio->set_pin_ctrl(dboard_iface::UNIT_RX, value);
+    if (attr == "DDR") return gpio->set_gpio_ddr(dboard_iface::UNIT_RX, value);
+    if (attr == "OUT") return gpio->set_gpio_out(dboard_iface::UNIT_RX, value);
+    if (attr == "ATR_0X") return gpio->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_IDLE, value);
+    if (attr == "ATR_RX") return gpio->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_RX_ONLY, value);
+    if (attr == "ATR_TX") return gpio->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_TX_ONLY, value);
+    if (attr == "ATR_XX") return gpio->set_atr_reg(dboard_iface::UNIT_RX, dboard_iface::ATR_REG_FULL_DUPLEX, value);
+}
+
+/***********************************************************************
+ * claimer logic
+ **********************************************************************/
+
+void x300_impl::claimer_loop(wb_iface::sptr iface)
+{
+    iface->poke32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_CLAIM_TIME), time(NULL));
+    iface->poke32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_CLAIM_SRC), get_process_hash());
+    boost::this_thread::sleep(boost::posix_time::milliseconds(1500)); //1.5 seconds
+}
+
+bool x300_impl::is_claimed(wb_iface::sptr iface)
+{
+    //If timed out then device is definitely unclaimed
+    if (iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_CLAIM_STATUS)) == 0)
+        return false;
+
+    //otherwise check claim src to determine if another thread with the same src has claimed the device
+    return iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_CLAIM_SRC)) != get_process_hash();
+}
+
+/***********************************************************************
+ * MTU detection
+ **********************************************************************/
+x300_impl::mtu_result_t x300_impl::determine_mtu(const std::string &addr, const mtu_result_t &user_mtu)
+{
+    udp_simple::sptr udp = udp_simple::make_connected(addr, BOOST_STRINGIZE(X300_MTU_DETECT_UDP_PORT));
+
+    std::vector<boost::uint8_t> buffer(std::max(user_mtu.recv_mtu, user_mtu.send_mtu));
+    x300_mtu_t *request = reinterpret_cast<x300_mtu_t *>(&buffer.front());
+    static const double echo_timeout = 0.020; //20 ms
+
+    //test holler - check if its supported in this fw version
+    request->flags = uhd::htonx<boost::uint32_t>(X300_MTU_DETECT_ECHO_REQUEST);
+    request->size = uhd::htonx<boost::uint32_t>(sizeof(x300_mtu_t));
+    udp->send(boost::asio::buffer(buffer, sizeof(x300_mtu_t)));
+    udp->recv(boost::asio::buffer(buffer), echo_timeout);
+    if (!(uhd::ntohx<boost::uint32_t>(request->flags) & X300_MTU_DETECT_ECHO_REPLY))
+        throw uhd::not_implemented_error("Holler protocol not implemented");
+
+    size_t min_recv_mtu = sizeof(x300_mtu_t);
+    size_t max_recv_mtu = user_mtu.recv_mtu;
+    size_t min_send_mtu = sizeof(x300_mtu_t);
+    size_t max_send_mtu = user_mtu.send_mtu;
+
+    UHD_MSG(status) << "Determining receive MTU ... ";
+    while (min_recv_mtu < max_recv_mtu)
+    {
+       size_t test_mtu = (max_recv_mtu/2 + min_recv_mtu/2 + 3) & ~3;
+
+       request->flags = uhd::htonx<boost::uint32_t>(X300_MTU_DETECT_ECHO_REQUEST);
+       request->size = uhd::htonx<boost::uint32_t>(test_mtu);
+       udp->send(boost::asio::buffer(buffer, sizeof(x300_mtu_t)));
+
+       size_t len = udp->recv(boost::asio::buffer(buffer), echo_timeout);
+
+       if (len >= test_mtu)
+           min_recv_mtu = test_mtu;
+       else
+           max_recv_mtu = test_mtu - 4;
+
+    }
+    UHD_MSG(status) << min_recv_mtu << std::endl;
+
+    UHD_MSG(status) << "Determining send MTU ... ";
+    while (min_send_mtu < max_send_mtu)
+    {
+        size_t test_mtu = (max_send_mtu/2 + min_send_mtu/2 + 3) & ~3;
+
+        request->flags = uhd::htonx<boost::uint32_t>(X300_MTU_DETECT_ECHO_REQUEST);
+        request->size = uhd::htonx<boost::uint32_t>(sizeof(x300_mtu_t));
+        udp->send(boost::asio::buffer(buffer, test_mtu));
+
+        size_t len = udp->recv(boost::asio::buffer(buffer), echo_timeout);
+        if (len >= sizeof(x300_mtu_t))
+            len = uhd::ntohx<boost::uint32_t>(request->size);
+
+        if (len >= test_mtu)
+            min_send_mtu = test_mtu;
+        else
+            max_send_mtu = test_mtu - 4;
+    }
+    UHD_MSG(status) << min_send_mtu << std::endl;
+
+    mtu_result_t mtu;
+    mtu.recv_mtu = min_recv_mtu;
+    mtu.send_mtu = min_send_mtu;
+    return mtu;
+}
+
+/***********************************************************************
+ * compat checks
+ **********************************************************************/
+
+void x300_impl::check_fw_compat(const fs_path &mb_path, wb_iface::sptr iface)
+{
+    boost::uint32_t compat_num = iface->peek32(SR_ADDR(X300_FW_SHMEM_BASE, X300_FW_SHMEM_COMPAT_NUM));
+    boost::uint32_t compat_major = (compat_num >> 16);
+    boost::uint32_t compat_minor = (compat_num & 0xffff);
+
+    if (compat_major != X300_FW_COMPAT_MAJOR)
+    {
+        throw uhd::runtime_error(str(boost::format(
+            "Expected firmware compatibility number 0x%x, but got 0x%x.%x:\n"
+            "The firmware build is not compatible with the host code build.\n"
+            "%s"
+        ) % int(X300_FW_COMPAT_MAJOR) % compat_major % compat_minor
+          % print_images_error()));
+    }
+    _tree->create<std::string>(mb_path / "fw_version").set(str(boost::format("%u.%u")
+                % compat_major % compat_minor));
+}
+
+void x300_impl::check_fpga_compat(const fs_path &mb_path, wb_iface::sptr iface)
+{
+    boost::uint32_t compat_num = iface->peek32(SR_ADDR(SET0_BASE, ZPU_RB_COMPAT_NUM));
+    boost::uint32_t compat_major = (compat_num >> 16);
+    boost::uint32_t compat_minor = (compat_num & 0xffff);
+
+    if (compat_major != X300_FPGA_COMPAT_MAJOR)
+    {
+        throw uhd::runtime_error(str(boost::format(
+            "Expected FPGA compatibility number 0x%x, but got 0x%x.%x:\n"
+            "The FPGA build is not compatible with the host code build.\n"
+            "%s"
+        ) % int(X300_FPGA_COMPAT_MAJOR) % compat_major % compat_minor
+          % print_images_error()));
+    }
+    _tree->create<std::string>(mb_path / "fpga_version").set(str(boost::format("%u.%u")
+                % compat_major % compat_minor));
+}
+
+x300_impl::x300_mboard_t x300_impl::get_mb_type_from_pcie(const std::string& resource, const std::string& rpc_port)
+{
+    x300_mboard_t mb_type = UNKNOWN;
+
+    //Detect the PCIe product ID to distinguish between X300 and X310
+    nirio_status status = NiRio_Status_Success;
+    boost::uint32_t pid;
+    niriok_proxy::sptr discovery_proxy =
+        niusrprio_session::create_kernel_proxy(resource, rpc_port);
+    if (discovery_proxy) {
+        nirio_status_chain(discovery_proxy->get_attribute(PRODUCT_NUMBER, pid), status);
+        discovery_proxy->close();
+        if (nirio_status_not_fatal(status)) {
+            //The PCIe ID -> MB mapping may be different from the EEPROM -> MB mapping
+            switch (pid) {
+                case X300_USRP_PCIE_SSID:
+                    mb_type = USRP_X300_MB; break;
+                case X310_USRP_PCIE_SSID:
+                case X310_2940R_PCIE_SSID:
+                case X310_2942R_PCIE_SSID:
+                case X310_2943R_PCIE_SSID:
+                case X310_2944R_PCIE_SSID:
+                case X310_2950R_PCIE_SSID:
+                case X310_2952R_PCIE_SSID:
+                case X310_2953R_PCIE_SSID:
+                case X310_2954R_PCIE_SSID:
+                    mb_type = USRP_X310_MB; break;
+                default:
+                    mb_type = UNKNOWN;      break;
+            }
+        }
+    }
+
+    return mb_type;
+}
+
+x300_impl::x300_mboard_t x300_impl::get_mb_type_from_eeprom(const uhd::usrp::mboard_eeprom_t& mb_eeprom)
+{
+    x300_mboard_t mb_type = UNKNOWN;
+    if (not mb_eeprom["product"].empty())
+    {
+        boost::uint16_t product_num = 0;
+        try {
+            product_num = boost::lexical_cast<boost::uint16_t>(mb_eeprom["product"]);
+        } catch (const boost::bad_lexical_cast &) {
+            product_num = 0;
+        }
+
+        switch (product_num) {
+            //The PCIe ID -> MB mapping may be different from the EEPROM -> MB mapping
+            case X300_USRP_PCIE_SSID:
+                mb_type = USRP_X300_MB; break;
+            case X310_USRP_PCIE_SSID:
+            case X310_2940R_PCIE_SSID:
+            case X310_2942R_PCIE_SSID:
+            case X310_2943R_PCIE_SSID:
+            case X310_2944R_PCIE_SSID:
+            case X310_2950R_PCIE_SSID:
+            case X310_2952R_PCIE_SSID:
+            case X310_2953R_PCIE_SSID:
+            case X310_2954R_PCIE_SSID:
+                mb_type = USRP_X310_MB; break;
+            default:
+                UHD_MSG(warning) << "X300 unknown product code in EEPROM: " << product_num << std::endl;
+                mb_type = UNKNOWN;      break;
+        }
+    }
+    return mb_type;
+}
+
diff --git a/host/lib/usrp/x300/x300_impl.hpp b/host/lib/usrp/x300/x300_impl.hpp
new file mode 100644
index 000000000..37f8cc468
--- /dev/null
+++ b/host/lib/usrp/x300/x300_impl.hpp
@@ -0,0 +1,306 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_X300_IMPL_HPP
+#define INCLUDED_X300_IMPL_HPP
+
+#include <uhd/property_tree.hpp>
+#include <uhd/device.hpp>
+#include <uhd/usrp/mboard_eeprom.hpp>
+#include <uhd/usrp/dboard_manager.hpp>
+#include <uhd/usrp/dboard_eeprom.hpp>
+#include <uhd/usrp/subdev_spec.hpp>
+#include <uhd/types/sensors.hpp>
+#include "x300_clock_ctrl.hpp"
+#include "x300_fw_common.h"
+#include <uhd/transport/udp_simple.hpp> //mtu
+#include <uhd/utils/tasks.hpp>
+#include "spi_core_3000.hpp"
+#include "x300_adc_ctrl.hpp"
+#include "x300_dac_ctrl.hpp"
+#include "rx_vita_core_3000.hpp"
+#include "tx_vita_core_3000.hpp"
+#include "time_core_3000.hpp"
+#include "rx_dsp_core_3000.hpp"
+#include "tx_dsp_core_3000.hpp"
+#include "i2c_core_100_wb32.hpp"
+#include "radio_ctrl_core_3000.hpp"
+#include "rx_frontend_core_200.hpp"
+#include "tx_frontend_core_200.hpp"
+#include "gpio_core_200.hpp"
+#include <boost/weak_ptr.hpp>
+#include <uhd/usrp/gps_ctrl.hpp>
+#include <uhd/usrp/mboard_eeprom.hpp>
+#include <uhd/transport/bounded_buffer.hpp>
+#include <uhd/transport/nirio/niusrprio_session.h>
+#include <uhd/transport/vrt_if_packet.hpp>
+#include "recv_packet_demuxer_3000.hpp"
+
+static const std::string X300_FW_FILE_NAME  = "usrp_x300_fw.bin";
+
+static const double X300_DEFAULT_TICK_RATE      = 200e6;        //Hz
+static const double X300_BUS_CLOCK_RATE         = 175e6;        //Hz
+
+static const size_t X300_TX_HW_BUFF_SIZE        = 0x90000;      //576KiB
+static const size_t X300_TX_FC_RESPONSE_FREQ    = 8;            //per flow-control window
+
+static const size_t X300_RX_SW_BUFF_SIZE_ETH        = 0x2000000; //32MiB    For an ~8k MTU any size >32MiB is just wasted buffer space
+static const size_t X300_RX_SW_BUFF_SIZE_ETH_MACOS  = 0x100000;  //1Mib
+static const double X300_RX_SW_BUFF_FULL_FACTOR     = 0.90;      //Buffer should ideally be 90% full.
+static const size_t X300_RX_FC_REQUEST_FREQ         = 32;        //per flow-control window
+
+static const size_t X300_PCIE_DATA_FRAME_SIZE   = 8192;          //bytes
+static const size_t X300_PCIE_DATA_NUM_FRAMES   = 2048;
+static const size_t X300_PCIE_MSG_FRAME_SIZE    = 256;           //bytes
+static const size_t X300_PCIE_MSG_NUM_FRAMES    = 32;
+
+static const size_t X300_ETH_DATA_FRAME_SIZE    = 8000;                             //bytes
+static const size_t X300_ETH_DATA_NUM_FRAMES    = 32;
+static const size_t X300_ETH_MSG_FRAME_SIZE     = uhd::transport::udp_simple::mtu;  //bytes
+static const size_t X300_ETH_MSG_NUM_FRAMES     = 32;
+static const double X300_DEFAULT_SYSREF_RATE    = 10e6;
+
+#define X300_RADIO_DEST_PREFIX_TX 0
+#define X300_RADIO_DEST_PREFIX_CTRL 1
+#define X300_RADIO_DEST_PREFIX_RX 2
+
+#define X300_XB_DST_E0 0
+#define X300_XB_DST_E1 1
+#define X300_XB_DST_R0 2
+#define X300_XB_DST_R1 3
+#define X300_XB_DST_CE0 4
+#define X300_XB_DST_CE1 5
+#define X300_XB_DST_CE2 5
+#define X300_XB_DST_PCI 7
+
+#define X300_DEVICE_THERE 2
+#define X300_DEVICE_HERE 0
+
+//eeprom addrs for various boards
+enum
+{
+    X300_DB0_RX_EEPROM = 0x5,
+    X300_DB0_TX_EEPROM = 0x4,
+    X300_DB0_GDB_EEPROM = 0x1,
+    X300_DB1_RX_EEPROM = 0x7,
+    X300_DB1_TX_EEPROM = 0x6,
+    X300_DB1_GDB_EEPROM = 0x3,
+};
+
+struct x300_dboard_iface_config_t
+{
+    gpio_core_200::sptr gpio;
+    spi_core_3000::sptr spi;
+    size_t rx_spi_slaveno;
+    size_t tx_spi_slaveno;
+    i2c_core_100_wb32::sptr i2c;
+    x300_clock_ctrl::sptr clock;
+    x300_clock_which_t which_rx_clk;
+    x300_clock_which_t which_tx_clk;
+    boost::uint8_t dboard_slot;
+};
+
+uhd::usrp::dboard_iface::sptr x300_make_dboard_iface(const x300_dboard_iface_config_t &);
+uhd::uart_iface::sptr x300_make_uart_iface(uhd::wb_iface::sptr iface);
+
+uhd::wb_iface::sptr x300_make_ctrl_iface_enet(uhd::transport::udp_simple::sptr udp);
+uhd::wb_iface::sptr x300_make_ctrl_iface_pcie(uhd::niusrprio::niriok_proxy& drv_proxy);
+
+class x300_impl : public uhd::device
+{
+public:
+    typedef uhd::transport::bounded_buffer<uhd::async_metadata_t> async_md_type;
+
+    x300_impl(const uhd::device_addr_t &);
+    void setup_mb(const size_t which, const uhd::device_addr_t &);
+    ~x300_impl(void);
+
+    //the io interface
+    uhd::rx_streamer::sptr get_rx_stream(const uhd::stream_args_t &);
+    uhd::tx_streamer::sptr get_tx_stream(const uhd::stream_args_t &);
+
+    //support old async call
+    bool recv_async_msg(uhd::async_metadata_t &, double);
+
+    // used by x300_find_with_addr to find X300 devices.
+    static bool is_claimed(uhd::wb_iface::sptr);
+
+    enum x300_mboard_t {
+        USRP_X300_MB, USRP_X310_MB, UNKNOWN
+    };
+    static x300_mboard_t get_mb_type_from_pcie(const std::string& resource, const std::string& rpc_port);
+    static x300_mboard_t get_mb_type_from_eeprom(const uhd::usrp::mboard_eeprom_t& mb_eeprom);
+
+private:
+    boost::shared_ptr<async_md_type> _async_md;
+
+    //perifs in the radio core
+    struct radio_perifs_t
+    {
+        radio_ctrl_core_3000::sptr ctrl;
+        spi_core_3000::sptr spi;
+        x300_adc_ctrl::sptr adc;
+        x300_dac_ctrl::sptr dac;
+        time_core_3000::sptr time64;
+        rx_vita_core_3000::sptr framer;
+        rx_dsp_core_3000::sptr ddc;
+        tx_vita_core_3000::sptr deframer;
+        tx_dsp_core_3000::sptr duc;
+        gpio_core_200_32wo::sptr leds;
+        rx_frontend_core_200::sptr rx_fe;
+        tx_frontend_core_200::sptr tx_fe;
+    };
+
+    //overflow recovery impl
+    void handle_overflow(radio_perifs_t &perif, boost::weak_ptr<uhd::rx_streamer> streamer);
+
+    //vector of member objects per motherboard
+    struct mboard_members_t
+    {
+        uhd::dict<size_t, boost::weak_ptr<uhd::rx_streamer> > rx_streamers;
+        uhd::dict<size_t, boost::weak_ptr<uhd::tx_streamer> > tx_streamers;
+
+        uhd::task::sptr claimer_task;
+        std::string addr;
+        std::string xport_path;
+        int router_dst_here;
+        uhd::device_addr_t send_args;
+        uhd::device_addr_t recv_args;
+        bool if_pkt_is_big_endian;
+        uhd::niusrprio::niusrprio_session::sptr  rio_fpga_interface;
+
+        //perifs in the zpu
+        uhd::wb_iface::sptr zpu_ctrl;
+        spi_core_3000::sptr zpu_spi;
+        i2c_core_100_wb32::sptr zpu_i2c;
+
+        //perifs in each radio
+        radio_perifs_t radio_perifs[2];
+        uhd::usrp::dboard_eeprom_t db_eeproms[8];
+
+        //per mboard frontend mapping
+        uhd::usrp::subdev_spec_t rx_fe_map;
+        uhd::usrp::subdev_spec_t tx_fe_map;
+
+        //other perifs on mboard
+        x300_clock_ctrl::sptr clock;
+        uhd::gps_ctrl::sptr gps;
+        gpio_core_200::sptr fp_gpio;
+
+        //clock control register bits
+        int clock_control_regs__clock_source;
+        int clock_control_regs__pps_select;
+        int clock_control_regs__pps_out_enb;
+        int clock_control_regs__tcxo_enb;
+        int clock_control_regs__gpsdo_pwr;
+    };
+    std::vector<mboard_members_t> _mb;
+
+    //task for periodically reclaiming the device from others
+    void claimer_loop(uhd::wb_iface::sptr);
+
+    boost::mutex _transport_setup_mutex;
+
+    void register_loopback_self_test(uhd::wb_iface::sptr iface);
+
+    void setup_radio(const size_t, const size_t which_radio, const std::string &db_name);
+
+    size_t _sid_framer;
+    struct sid_config_t
+    {
+        boost::uint8_t router_addr_there;
+        boost::uint8_t dst_prefix; //2bits
+        boost::uint8_t router_dst_there;
+        boost::uint8_t router_dst_here;
+    };
+    boost::uint32_t allocate_sid(mboard_members_t &mb, const sid_config_t &config);
+
+    struct both_xports_t
+    {
+        uhd::transport::zero_copy_if::sptr recv;
+        uhd::transport::zero_copy_if::sptr send;
+        size_t recv_buff_size;
+        size_t send_buff_size;
+    };
+    both_xports_t make_transport(
+        const size_t mb_index,
+        const uint8_t& destination,
+        const uint8_t& prefix,
+        const uhd::device_addr_t& args,
+        boost::uint32_t& sid);
+
+    struct mtu_result_t
+    {
+        size_t recv_mtu;
+        size_t send_mtu;
+    };
+
+    mtu_result_t determine_mtu(const std::string &addr, const mtu_result_t &user_mtu);
+
+    ////////////////////////////////////////////////////////////////////
+    //
+    //Caching for transport interface re-use -- like sharing a DMA.
+    //The cache is optionally used by make_transport by use-case.
+    //The cache maps an ID string to a transport-ish object.
+    //The ID string identifies a purpose for the transport.
+    //
+    //For recv, there is a demux cache, which maps a ID string
+    //to a recv demux object. When a demux is used, the underlying transport
+    //must never be used outside of the demux. Use demux->make_proxy(sid).
+    //
+    uhd::dict<std::string, uhd::usrp::recv_packet_demuxer_3000::sptr> _demux_cache;
+    //
+    //For send, there is a shared send xport, which maps an ID string
+    //to a transport capable of sending buffers. Send transports
+    //can be shared amongst multiple callers, unlike recv.
+    //
+    uhd::dict<std::string, uhd::transport::zero_copy_if::sptr> _send_cache;
+    //
+    ////////////////////////////////////////////////////////////////////
+
+    uhd::dict<std::string, uhd::usrp::dboard_manager::sptr> _dboard_managers;
+    uhd::dict<std::string, uhd::usrp::dboard_iface::sptr> _dboard_ifaces;
+
+    void set_rx_fe_corrections(const uhd::fs_path &mb_path, const std::string &fe_name, const double lo_freq);
+
+    void update_rx_subdev_spec(const size_t, const uhd::usrp::subdev_spec_t &spec);
+    void update_tx_subdev_spec(const size_t, const uhd::usrp::subdev_spec_t &spec);
+
+    void set_tick_rate(mboard_members_t &, const double);
+    void update_tick_rate(mboard_members_t &, const double);
+    void update_rx_samp_rate(mboard_members_t&, const size_t, const double);
+    void update_tx_samp_rate(mboard_members_t&, const size_t, const double);
+
+    void update_clock_control(mboard_members_t&);
+    void set_time_source_out(mboard_members_t&, const bool);
+    void update_clock_source(mboard_members_t&, const std::string &);
+    void update_time_source(mboard_members_t&, const std::string &);
+
+    uhd::sensor_value_t get_ref_locked(uhd::wb_iface::sptr);
+
+    void set_db_eeprom(uhd::i2c_iface::sptr i2c, const size_t, const uhd::usrp::dboard_eeprom_t &);
+    void set_mb_eeprom(uhd::i2c_iface::sptr i2c, const uhd::usrp::mboard_eeprom_t &);
+
+    void check_fw_compat(const uhd::fs_path &mb_path, uhd::wb_iface::sptr iface);
+    void check_fpga_compat(const uhd::fs_path &mb_path, uhd::wb_iface::sptr iface);
+
+    void update_atr_leds(gpio_core_200_32wo::sptr, const std::string &ant);
+    boost::uint32_t get_fp_gpio(gpio_core_200::sptr, const std::string &);
+    void set_fp_gpio(gpio_core_200::sptr, const std::string &, const boost::uint32_t);
+};
+
+#endif /* INCLUDED_X300_IMPL_HPP */
diff --git a/host/lib/usrp/x300/x300_init.sh b/host/lib/usrp/x300/x300_init.sh
new file mode 100644
index 000000000..96c346c12
--- /dev/null
+++ b/host/lib/usrp/x300/x300_init.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+utils/usrp_burn_mb_eeprom --key=serial --val="x310rC12"
+utils/usrp_burn_mb_eeprom --key=name --val="dillen"
+
+utils/usrp_burn_mb_eeprom --key=product --val="30410"
+utils/usrp_burn_mb_eeprom --key=revision --val="3"
+
+mac0=$(python -c "import random; mac = [0x00, 0x16, 0x3e, random.randint(0x00, 0x7f),random.randint(0x00, 0xff),random.randint(0x00, 0xff)]; print ':'.join(map(lambda x: '%02x' % x, mac))")
+mac1=$(python -c "import random; mac = [0x00, 0x16, 0x3e, random.randint(0x00, 0x7f),random.randint(0x00, 0xff),random.randint(0x00, 0xff)]; print ':'.join(map(lambda x: '%02x' % x, mac))")
+
+utils/usrp_burn_mb_eeprom --key=mac-addr0 --val="${mac0}"
+utils/usrp_burn_mb_eeprom --key=mac-addr1 --val="${mac1}"
+
+utils/usrp_burn_mb_eeprom --key=gateway --val="192.168.10.1"
+
+utils/usrp_burn_mb_eeprom --key=subnet0 --val="255.255.255.0"
+utils/usrp_burn_mb_eeprom --key=subnet1 --val="255.255.255.0"
+utils/usrp_burn_mb_eeprom --key=subnet2 --val="255.255.255.0"
+utils/usrp_burn_mb_eeprom --key=subnet3 --val="255.255.255.0"
+
+utils/usrp_burn_mb_eeprom --key=ip-addr0 --val="192.168.10.2"
+utils/usrp_burn_mb_eeprom --key=ip-addr1 --val="192.168.10.3"
+utils/usrp_burn_mb_eeprom --key=ip-addr2 --val="192.168.10.2"
+utils/usrp_burn_mb_eeprom --key=ip-addr3 --val="192.168.10.3"
diff --git a/host/lib/usrp/x300/x300_io_impl.cpp b/host/lib/usrp/x300/x300_io_impl.cpp
new file mode 100644
index 000000000..00a31b8d6
--- /dev/null
+++ b/host/lib/usrp/x300/x300_io_impl.cpp
@@ -0,0 +1,652 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include "x300_regs.hpp"
+#include "x300_impl.hpp"
+#include "validate_subdev_spec.hpp"
+#include "../../transport/super_recv_packet_handler.hpp"
+#include "../../transport/super_send_packet_handler.hpp"
+#include <uhd/transport/nirio_zero_copy.hpp>
+#include "async_packet_handler.hpp"
+#include <uhd/transport/bounded_buffer.hpp>
+#include <boost/bind.hpp>
+#include <uhd/utils/tasks.hpp>
+#include <uhd/utils/log.hpp>
+#include <boost/foreach.hpp>
+#include <boost/make_shared.hpp>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::transport;
+
+/***********************************************************************
+ * update streamer rates
+ **********************************************************************/
+void x300_impl::update_tick_rate(mboard_members_t &mb, const double rate)
+{
+    BOOST_FOREACH(const size_t &dspno, mb.rx_streamers.keys())
+    {
+        boost::shared_ptr<sph::recv_packet_streamer> my_streamer =
+            boost::dynamic_pointer_cast<sph::recv_packet_streamer>(mb.rx_streamers[dspno].lock());
+        if (my_streamer) my_streamer->set_tick_rate(rate);
+    }
+    BOOST_FOREACH(const size_t &dspno, mb.tx_streamers.keys())
+    {
+        boost::shared_ptr<sph::send_packet_streamer> my_streamer =
+            boost::dynamic_pointer_cast<sph::send_packet_streamer>(mb.tx_streamers[dspno].lock());
+        if (my_streamer) my_streamer->set_tick_rate(rate);
+    }
+}
+
+void x300_impl::update_rx_samp_rate(mboard_members_t &mb, const size_t dspno, const double rate)
+{
+    if (not mb.rx_streamers.has_key(dspno)) return;
+    boost::shared_ptr<sph::recv_packet_streamer> my_streamer =
+        boost::dynamic_pointer_cast<sph::recv_packet_streamer>(mb.rx_streamers[dspno].lock());
+    if (not my_streamer) return;
+    my_streamer->set_samp_rate(rate);
+    const double adj = mb.radio_perifs[dspno].ddc->get_scaling_adjustment();
+    my_streamer->set_scale_factor(adj);
+}
+
+void x300_impl::update_tx_samp_rate(mboard_members_t &mb, const size_t dspno, const double rate)
+{
+    if (not mb.tx_streamers.has_key(dspno)) return;
+    boost::shared_ptr<sph::send_packet_streamer> my_streamer =
+        boost::dynamic_pointer_cast<sph::send_packet_streamer>(mb.tx_streamers[dspno].lock());
+    if (not my_streamer) return;
+    my_streamer->set_samp_rate(rate);
+    const double adj = mb.radio_perifs[dspno].duc->get_scaling_adjustment();
+    my_streamer->set_scale_factor(adj);
+}
+
+/***********************************************************************
+ * Setup dboard muxing for IQ
+ **********************************************************************/
+void x300_impl::update_rx_subdev_spec(const size_t mb_i, const subdev_spec_t &spec)
+{
+    const std::string mb_name = boost::lexical_cast<std::string>(mb_i);
+    fs_path root = "/mboards/"+mb_name+"/dboards";
+
+    //sanity checking
+    validate_subdev_spec(_tree, spec, "rx", mb_name);
+    UHD_ASSERT_THROW(spec.size() <= 2);
+    if (spec.size() > 0) UHD_ASSERT_THROW(spec[0].db_name == "A");
+    if (spec.size() > 1) UHD_ASSERT_THROW(spec[1].db_name == "B");
+
+    //setup mux for this spec
+    for (size_t i = 0; i < 2; i++)
+    {
+        //extract db name
+        const std::string db_name = (i == 0)? "A" : "B";
+        if (i < spec.size()) UHD_ASSERT_THROW(spec[i].db_name == db_name);
+
+        //extract fe name
+        std::string fe_name;
+        if (i < spec.size()) fe_name = spec[i].sd_name;
+        else fe_name = _tree->list(root / db_name / "rx_frontends").front();
+
+        //extract connection
+        const std::string conn = _tree->access<std::string>(root / db_name / "rx_frontends" / fe_name / "connection").get();
+
+        //swap condition
+        const bool fe_swapped = (conn == "QI" or conn == "Q");
+        _mb[mb_i].radio_perifs[i].ddc->set_mux(conn, fe_swapped);
+        //see usrp/io_impl.cpp if multiple DSPs share the frontend:
+        _mb[mb_i].radio_perifs[i].rx_fe->set_mux(fe_swapped);
+    }
+
+    _mb[mb_i].rx_fe_map = spec;
+}
+
+void x300_impl::update_tx_subdev_spec(const size_t mb_i, const subdev_spec_t &spec)
+{
+    const std::string mb_name = boost::lexical_cast<std::string>(mb_i);
+    fs_path root = "/mboards/"+mb_name+"/dboards";
+
+    //sanity checking
+    validate_subdev_spec(_tree, spec, "tx", mb_name);
+    UHD_ASSERT_THROW(spec.size() <= 2);
+    if (spec.size() > 0) UHD_ASSERT_THROW(spec[0].db_name == "A");
+    if (spec.size() > 1) UHD_ASSERT_THROW(spec[1].db_name == "B");
+
+    //set the mux for this spec
+    for (size_t i = 0; i < 2; i++)
+    {
+        //extract db name
+        const std::string db_name = (i == 0)? "A" : "B";
+        if (i < spec.size()) UHD_ASSERT_THROW(spec[i].db_name == db_name);
+
+        //extract fe name
+        std::string fe_name;
+        if (i < spec.size()) fe_name = spec[i].sd_name;
+        else fe_name = _tree->list(root / db_name / "tx_frontends").front();
+
+        //extract connection
+        const std::string conn = _tree->access<std::string>(root / db_name / "tx_frontends" / fe_name / "connection").get();
+
+	//swap condition
+        _mb[mb_i].radio_perifs[i].tx_fe->set_mux(conn);
+
+    }
+
+    _mb[mb_i].tx_fe_map = spec;
+}
+
+/***********************************************************************
+ * VITA stuff
+ **********************************************************************/
+static void x300_if_hdr_unpack_be(
+    const boost::uint32_t *packet_buff,
+    vrt::if_packet_info_t &if_packet_info
+){
+    if_packet_info.link_type = vrt::if_packet_info_t::LINK_TYPE_CHDR;
+    return vrt::if_hdr_unpack_be(packet_buff, if_packet_info);
+}
+
+static void x300_if_hdr_pack_be(
+    boost::uint32_t *packet_buff,
+    vrt::if_packet_info_t &if_packet_info
+){
+    if_packet_info.link_type = vrt::if_packet_info_t::LINK_TYPE_CHDR;
+    return vrt::if_hdr_pack_be(packet_buff, if_packet_info);
+}
+
+static void x300_if_hdr_unpack_le(
+    const boost::uint32_t *packet_buff,
+    vrt::if_packet_info_t &if_packet_info
+){
+    if_packet_info.link_type = vrt::if_packet_info_t::LINK_TYPE_CHDR;
+    return vrt::if_hdr_unpack_le(packet_buff, if_packet_info);
+}
+
+static void x300_if_hdr_pack_le(
+    boost::uint32_t *packet_buff,
+    vrt::if_packet_info_t &if_packet_info
+){
+    if_packet_info.link_type = vrt::if_packet_info_t::LINK_TYPE_CHDR;
+    return vrt::if_hdr_pack_le(packet_buff, if_packet_info);
+}
+
+/***********************************************************************
+ * RX flow control handler
+ **********************************************************************/
+static size_t get_rx_flow_control_window(size_t frame_size, size_t sw_buff_size, const device_addr_t& rx_args)
+{
+    double fullness_factor = rx_args.cast<double>("recv_buff_fullness", X300_RX_SW_BUFF_FULL_FACTOR);
+
+    if (fullness_factor < 0.01 || fullness_factor > 1) {
+        throw uhd::value_error("recv_buff_fullness must be between 0.01 and 1 inclusive (1% to 100%)");
+    }
+
+    size_t window_in_pkts = (static_cast<size_t>(sw_buff_size * fullness_factor) / frame_size);
+    if (window_in_pkts == 0) {
+        throw uhd::value_error("recv_buff_size must be larger than the recv_frame_size.");
+    }
+    return window_in_pkts;
+}
+
+static void handle_rx_flowctrl(const boost::uint32_t sid, zero_copy_if::sptr xport, bool big_endian, boost::shared_ptr<boost::uint32_t> seq32_state, const size_t last_seq)
+{
+    managed_send_buffer::sptr buff = xport->get_send_buff(0.0);
+    if (not buff)
+    {
+        throw uhd::runtime_error("handle_rx_flowctrl timed out getting a send buffer");
+    }
+    boost::uint32_t *pkt = buff->cast<boost::uint32_t *>();
+
+    //recover seq32
+    boost::uint32_t &seq32 = *seq32_state;
+    const size_t seq12 = seq32 & 0xfff;
+    if (last_seq < seq12) seq32 += (1 << 12);
+    seq32 &= ~0xfff;
+    seq32 |= last_seq;
+
+    //load packet info
+    vrt::if_packet_info_t packet_info;
+    packet_info.packet_type = vrt::if_packet_info_t::PACKET_TYPE_CONTEXT;
+    packet_info.num_payload_words32 = 2;
+    packet_info.num_payload_bytes = packet_info.num_payload_words32*sizeof(boost::uint32_t);
+    packet_info.packet_count = seq32;
+    packet_info.sob = false;
+    packet_info.eob = false;
+    packet_info.sid = sid;
+    packet_info.has_sid = true;
+    packet_info.has_cid = false;
+    packet_info.has_tsi = false;
+    packet_info.has_tsf = false;
+    packet_info.has_tlr = false;
+
+    //load header
+    if (big_endian)
+        x300_if_hdr_pack_be(pkt, packet_info);
+    else
+        x300_if_hdr_pack_le(pkt, packet_info);
+
+    //load payload
+    pkt[packet_info.num_header_words32+0] = uhd::htonx<boost::uint32_t>(0);
+    pkt[packet_info.num_header_words32+1] = uhd::htonx<boost::uint32_t>(seq32);
+
+    //send the buffer over the interface
+    buff->commit(sizeof(boost::uint32_t)*(packet_info.num_packet_words32));
+}
+
+
+/***********************************************************************
+ * TX flow control handler
+ **********************************************************************/
+struct x300_tx_fc_guts_t
+{
+    x300_tx_fc_guts_t(void):
+        stream_channel(0),
+        device_channel(0),
+        last_seq_out(0),
+        last_seq_ack(0),
+        seq_queue(1){}
+    size_t stream_channel;
+    size_t device_channel;
+    size_t last_seq_out;
+    size_t last_seq_ack;
+    bounded_buffer<size_t> seq_queue;
+    boost::shared_ptr<x300_impl::async_md_type> async_queue;
+    boost::shared_ptr<x300_impl::async_md_type> old_async_queue;
+};
+
+static size_t get_tx_flow_control_window(size_t frame_size, const device_addr_t& tx_args)
+{
+    double hw_buff_size = tx_args.cast<double>("send_buff_size", X300_TX_HW_BUFF_SIZE);
+    size_t window_in_pkts = (static_cast<size_t>(hw_buff_size) / frame_size);
+    if (window_in_pkts == 0) {
+        throw uhd::value_error("send_buff_size must be larger than the send_frame_size.");
+    }
+    return window_in_pkts;
+}
+
+static void handle_tx_async_msgs(boost::shared_ptr<x300_tx_fc_guts_t> guts, zero_copy_if::sptr xport, bool big_endian, x300_clock_ctrl::sptr clock)
+{
+    managed_recv_buffer::sptr buff = xport->get_recv_buff();
+    if (not buff) return;
+
+    //extract packet info
+    vrt::if_packet_info_t if_packet_info;
+    if_packet_info.num_packet_words32 = buff->size()/sizeof(boost::uint32_t);
+    const boost::uint32_t *packet_buff = buff->cast<const boost::uint32_t *>();
+
+    //unpacking can fail
+    uint32_t (*endian_conv)(uint32_t) = uhd::ntohx;
+    try
+    {
+        if (big_endian)
+        {
+            x300_if_hdr_unpack_be(packet_buff, if_packet_info);
+            endian_conv = uhd::ntohx;
+        }
+        else
+        {
+            x300_if_hdr_unpack_le(packet_buff, if_packet_info);
+            endian_conv = uhd::wtohx;
+        }
+    }
+    catch(const std::exception &ex)
+    {
+        UHD_MSG(error) << "Error parsing async message packet: " << ex.what() << std::endl;
+        return;
+    }
+
+    //catch the flow control packets and react
+    if (endian_conv(packet_buff[if_packet_info.num_header_words32+0]) == 0)
+    {
+        const size_t seq = endian_conv(packet_buff[if_packet_info.num_header_words32+1]);
+        guts->seq_queue.push_with_haste(seq);
+        return;
+    }
+
+    //fill in the async metadata
+    async_metadata_t metadata;
+    load_metadata_from_buff(
+        endian_conv, metadata, if_packet_info, packet_buff,
+        clock->get_master_clock_rate(), guts->stream_channel);
+    guts->async_queue->push_with_pop_on_full(metadata);
+    metadata.channel = guts->device_channel;
+    guts->old_async_queue->push_with_pop_on_full(metadata);
+    standard_async_msg_prints(metadata);
+}
+
+static managed_send_buffer::sptr get_tx_buff_with_flowctrl(
+    task::sptr /*holds ref*/,
+    boost::shared_ptr<x300_tx_fc_guts_t> guts,
+    zero_copy_if::sptr xport,
+    size_t fc_pkt_window,
+    const double timeout
+){
+    while (true)
+    {
+        const size_t delta = (guts->last_seq_out & 0xfff) - (guts->last_seq_ack & 0xfff);
+        if ((delta & 0xfff) <= fc_pkt_window) break;
+
+        const bool ok = guts->seq_queue.pop_with_timed_wait(guts->last_seq_ack, timeout);
+        if (not ok) return managed_send_buffer::sptr(); //timeout waiting for flow control
+    }
+
+    managed_send_buffer::sptr buff = xport->get_send_buff(timeout);
+    if (buff) guts->last_seq_out++; //update seq, this will actually be a send
+    return buff;
+}
+
+/***********************************************************************
+ * Async Data
+ **********************************************************************/
+bool x300_impl::recv_async_msg(
+    async_metadata_t &async_metadata, double timeout
+){
+    return _async_md->pop_with_timed_wait(async_metadata, timeout);
+}
+
+/***********************************************************************
+ * Receive streamer
+ **********************************************************************/
+rx_streamer::sptr x300_impl::get_rx_stream(const uhd::stream_args_t &args_)
+{
+    boost::mutex::scoped_lock lock(_transport_setup_mutex);
+    stream_args_t args = args_;
+
+    //setup defaults for unspecified values
+    if (not args.otw_format.empty() and args.otw_format != "sc16")
+    {
+        throw uhd::value_error("x300_impl::get_rx_stream only supports otw_format sc16");
+    }
+    args.otw_format = "sc16";
+    args.channels = args.channels.empty()? std::vector<size_t>(1, 0) : args.channels;
+
+    boost::shared_ptr<sph::recv_packet_streamer> my_streamer;
+    for (size_t stream_i = 0; stream_i < args.channels.size(); stream_i++)
+    {
+        const size_t chan = args.channels[stream_i];
+        size_t mb_chan = chan, mb_index = 0;
+        BOOST_FOREACH(mboard_members_t &mb, _mb)
+        {
+            if (mb_chan < mb.rx_fe_map.size()) break;
+            else mb_chan -= mb.rx_fe_map.size();
+            mb_index++;
+        }
+        mboard_members_t &mb = _mb[mb_index];
+        radio_perifs_t &perif = mb.radio_perifs[mb_chan];
+
+        //setup the dsp transport hints (default to a large recv buff)
+        device_addr_t device_addr = mb.recv_args;
+        if (not device_addr.has_key("recv_buff_size"))
+        {
+            if (mb.xport_path != "nirio") {
+                //For the ethernet transport, the buffer has to be set before creating
+                //the transport because it is independent of the frame size and # frames
+                //For nirio, the buffer size is not configurable by the user
+                #if defined(UHD_PLATFORM_MACOS) || defined(UHD_PLATFORM_BSD)
+                    //limit buffer resize on macos or it will error
+                    device_addr["recv_buff_size"] = boost::lexical_cast<std::string>(X300_RX_SW_BUFF_SIZE_ETH_MACOS);
+                #elif defined(UHD_PLATFORM_LINUX) || defined(UHD_PLATFORM_WIN32)
+                    //set to half-a-second of buffering at max rate
+                    device_addr["recv_buff_size"] = boost::lexical_cast<std::string>(X300_RX_SW_BUFF_SIZE_ETH);
+                #endif
+            }
+        }
+
+        //allocate sid and create transport
+        uint8_t dest = (mb_chan == 0)? X300_XB_DST_R0 : X300_XB_DST_R1;
+        boost::uint32_t data_sid;
+        UHD_LOG << "creating rx stream " << device_addr.to_string() << std::endl;
+        both_xports_t xport = this->make_transport(mb_index, dest, X300_RADIO_DEST_PREFIX_RX, device_addr, data_sid);
+        UHD_LOG << boost::format("data_sid = 0x%08x, actual recv_buff_size = %d\n") % data_sid % xport.recv_buff_size << std::endl;
+
+        //calculate packet size
+        static const size_t hdr_size = 0
+            + vrt::num_vrl_words32*sizeof(boost::uint32_t)
+            + vrt::max_if_hdr_words32*sizeof(boost::uint32_t)
+            + sizeof(vrt::if_packet_info_t().tlr) //forced to have trailer
+            - sizeof(vrt::if_packet_info_t().cid) //no class id ever used
+            - sizeof(vrt::if_packet_info_t().tsi) //no int time ever used
+        ;
+        const size_t bpp = xport.recv->get_recv_frame_size() - hdr_size;
+        const size_t bpi = convert::get_bytes_per_item(args.otw_format);
+        const size_t spp = unsigned(args.args.cast<double>("spp", bpp/bpi));
+
+        //make the new streamer given the samples per packet
+        if (not my_streamer) my_streamer = boost::make_shared<sph::recv_packet_streamer>(spp);
+        my_streamer->resize(args.channels.size());
+
+        //init some streamer stuff
+        std::string conv_endianness;
+        if (mb.if_pkt_is_big_endian) {
+            my_streamer->set_vrt_unpacker(&x300_if_hdr_unpack_be);
+            conv_endianness = "be";
+        } else {
+            my_streamer->set_vrt_unpacker(&x300_if_hdr_unpack_le);
+            conv_endianness = "le";
+        }
+
+        //set the converter
+        uhd::convert::id_type id;
+        id.input_format = args.otw_format + "_item32_" + conv_endianness;
+        id.num_inputs = 1;
+        id.output_format = args.cpu_format;
+        id.num_outputs = 1;
+        my_streamer->set_converter(id);
+
+        perif.framer->clear();
+        perif.framer->set_nsamps_per_packet(spp); //seems to be a good place to set this
+        perif.framer->set_sid((data_sid << 16) | (data_sid >> 16));
+        perif.framer->setup(args);
+        perif.ddc->setup(args);
+
+        //flow control setup
+        const size_t fc_window = get_rx_flow_control_window(xport.recv->get_recv_frame_size(), xport.recv_buff_size, device_addr);
+        const size_t fc_handle_window = std::max<size_t>(1, fc_window / X300_RX_FC_REQUEST_FREQ);
+
+        UHD_LOG << "RX Flow Control Window = " << fc_window << ", RX Flow Control Handler Window = " << fc_handle_window << std::endl;
+
+        perif.framer->configure_flow_control(fc_window);
+
+        boost::shared_ptr<boost::uint32_t> seq32(new boost::uint32_t(0));
+        //Give the streamer a functor to get the recv_buffer
+        //bind requires a zero_copy_if::sptr to add a streamer->xport lifetime dependency
+        my_streamer->set_xport_chan_get_buff(
+            stream_i,
+            boost::bind(&zero_copy_if::get_recv_buff, xport.recv, _1),
+            true /*flush*/
+        );
+        //Give the streamer a functor to handle overflows
+        //bind requires a weak_ptr to break the a streamer->streamer circular dependency
+        //Using "this" is OK because we know that x300_impl will outlive the streamer
+        my_streamer->set_overflow_handler(
+            stream_i,
+            boost::bind(&x300_impl::handle_overflow, this, boost::ref(perif), boost::weak_ptr<uhd::rx_streamer>(my_streamer))
+        );
+        //Give the streamer a functor to send flow control messages
+        //handle_rx_flowctrl is static and has no lifetime issues
+        my_streamer->set_xport_handle_flowctrl(
+            stream_i, boost::bind(&handle_rx_flowctrl, data_sid, xport.send, mb.if_pkt_is_big_endian, seq32, _1),
+            fc_handle_window,
+            true/*init*/
+        );
+        //Give the streamer a functor issue stream cmd
+        //bind requires a rx_vita_core_3000::sptr to add a streamer->framer lifetime dependency
+        my_streamer->set_issue_stream_cmd(
+            stream_i, boost::bind(&rx_vita_core_3000::issue_stream_command, perif.framer, _1)
+        );
+
+        //Store a weak pointer to prevent a streamer->x300_impl->streamer circular dependency
+        mb.rx_streamers[mb_chan] = boost::weak_ptr<sph::recv_packet_streamer>(my_streamer);
+
+        //sets all tick and samp rates on this streamer
+        const fs_path mb_path = "/mboards/"+boost::lexical_cast<std::string>(mb_index);
+        _tree->access<double>(mb_path / "tick_rate").update();
+        _tree->access<double>(mb_path / "rx_dsps" / boost::lexical_cast<std::string>(mb_chan) / "rate" / "value").update();
+    }
+
+    return my_streamer;
+}
+
+void x300_impl::handle_overflow(x300_impl::radio_perifs_t &perif, boost::weak_ptr<uhd::rx_streamer> streamer)
+{
+    boost::shared_ptr<sph::recv_packet_streamer> my_streamer =
+            boost::dynamic_pointer_cast<sph::recv_packet_streamer>(streamer.lock());
+    if (not my_streamer) return; //If the rx_streamer has expired then overflow handling makes no sense.
+
+    if (my_streamer->get_num_channels() == 1)
+    {
+        perif.framer->handle_overflow();
+        return;
+    }
+
+    /////////////////////////////////////////////////////////////
+    // MIMO overflow recovery time
+    /////////////////////////////////////////////////////////////
+    //find out if we were in continuous mode before stopping
+    const bool in_continuous_streaming_mode = perif.framer->in_continuous_streaming_mode();
+    //stop streaming
+    my_streamer->issue_stream_cmd(stream_cmd_t::STREAM_MODE_STOP_CONTINUOUS);
+    //flush transports
+    my_streamer->flush_all(0.001);
+    //restart streaming
+    if (in_continuous_streaming_mode)
+    {
+        stream_cmd_t stream_cmd(stream_cmd_t::STREAM_MODE_START_CONTINUOUS);
+        stream_cmd.stream_now = false;
+        stream_cmd.time_spec = perif.time64->get_time_now() + time_spec_t(0.01);
+        my_streamer->issue_stream_cmd(stream_cmd);
+    }
+}
+
+/***********************************************************************
+ * Transmit streamer
+ **********************************************************************/
+tx_streamer::sptr x300_impl::get_tx_stream(const uhd::stream_args_t &args_)
+{
+    boost::mutex::scoped_lock lock(_transport_setup_mutex);
+    stream_args_t args = args_;
+
+    //setup defaults for unspecified values
+    if (not args.otw_format.empty() and args.otw_format != "sc16")
+    {
+        throw uhd::value_error("x300_impl::get_rx_stream only supports otw_format sc16");
+    }
+    args.otw_format = "sc16";
+    args.channels = args.channels.empty()? std::vector<size_t>(1, 0) : args.channels;
+
+    //shared async queue for all channels in streamer
+    boost::shared_ptr<async_md_type> async_md(new async_md_type(1000/*messages deep*/));
+
+    boost::shared_ptr<sph::send_packet_streamer> my_streamer;
+    for (size_t stream_i = 0; stream_i < args.channels.size(); stream_i++)
+    {
+        const size_t chan = args.channels[stream_i];
+        size_t mb_chan = chan, mb_index = 0;
+        BOOST_FOREACH(mboard_members_t &mb, _mb)
+        {
+            if (mb_chan < mb.tx_fe_map.size()) break;
+            else mb_chan -= mb.tx_fe_map.size();
+            mb_index++;
+        }
+        mboard_members_t &mb = _mb[mb_index];
+        radio_perifs_t &perif = mb.radio_perifs[mb_chan];
+
+        //setup the dsp transport hints (TODO)
+        device_addr_t device_addr = mb.send_args;
+
+        //allocate sid and create transport
+        uint8_t dest = (mb_chan == 0)? X300_XB_DST_R0 : X300_XB_DST_R1;
+        boost::uint32_t data_sid;
+        UHD_LOG << "creating tx stream " << device_addr.to_string() << std::endl;
+        both_xports_t xport = this->make_transport(mb_index, dest, X300_RADIO_DEST_PREFIX_TX, device_addr, data_sid);
+        UHD_LOG << boost::format("data_sid = 0x%08x\n") % data_sid << std::endl;
+
+        //calculate packet size
+        static const size_t hdr_size = 0
+            + vrt::num_vrl_words32*sizeof(boost::uint32_t)
+            + vrt::max_if_hdr_words32*sizeof(boost::uint32_t)
+            //+ sizeof(vrt::if_packet_info_t().tlr) //forced to have trailer
+            - sizeof(vrt::if_packet_info_t().cid) //no class id ever used
+            - sizeof(vrt::if_packet_info_t().tsi) //no int time ever used
+        ;
+        const size_t bpp = xport.send->get_send_frame_size() - hdr_size;
+        const size_t bpi = convert::get_bytes_per_item(args.otw_format);
+        const size_t spp = unsigned(args.args.cast<double>("spp", bpp/bpi));
+
+        //make the new streamer given the samples per packet
+        if (not my_streamer) my_streamer = boost::make_shared<sph::send_packet_streamer>(spp);
+        my_streamer->resize(args.channels.size());
+
+        std::string conv_endianness;
+        if (mb.if_pkt_is_big_endian) {
+            my_streamer->set_vrt_packer(&x300_if_hdr_pack_be);
+            conv_endianness = "be";
+        } else {
+            my_streamer->set_vrt_packer(&x300_if_hdr_pack_le);
+            conv_endianness = "le";
+        }
+
+        //set the converter
+        uhd::convert::id_type id;
+        id.input_format = args.cpu_format;
+        id.num_inputs = 1;
+        id.output_format = args.otw_format + "_item32_" + conv_endianness;
+        id.num_outputs = 1;
+        my_streamer->set_converter(id);
+
+        perif.deframer->clear();
+        perif.deframer->setup(args);
+        perif.duc->setup(args);
+
+        //flow control setup
+        size_t fc_window = get_tx_flow_control_window(xport.send->get_send_frame_size(), device_addr);  //In packets
+        const size_t fc_handle_window = std::max<size_t>(1, fc_window/X300_TX_FC_RESPONSE_FREQ);
+
+        UHD_LOG << "TX Flow Control Window = " << fc_window << ", TX Flow Control Handler Window = " << fc_handle_window << std::endl;
+
+        perif.deframer->configure_flow_control(0/*cycs off*/, fc_handle_window);
+        boost::shared_ptr<x300_tx_fc_guts_t> guts(new x300_tx_fc_guts_t());
+        guts->stream_channel = stream_i;
+        guts->device_channel = chan;
+        guts->async_queue = async_md;
+        guts->old_async_queue = _async_md;
+        task::sptr task = task::make(boost::bind(&handle_tx_async_msgs, guts, xport.recv, mb.if_pkt_is_big_endian, mb.clock));
+
+        //Give the streamer a functor to get the send buffer
+        //get_tx_buff_with_flowctrl is static so bind has no lifetime issues
+        //xport.send (sptr) is required to add streamer->data-transport lifetime dependency
+        //task (sptr) is required to add  a streamer->async-handler lifetime dependency
+        my_streamer->set_xport_chan_get_buff(
+            stream_i,
+            boost::bind(&get_tx_buff_with_flowctrl, task, guts, xport.send, fc_window, _1)
+        );
+        //Give the streamer a functor handled received async messages
+        my_streamer->set_async_receiver(
+            boost::bind(&async_md_type::pop_with_timed_wait, async_md, _1, _2)
+        );
+        my_streamer->set_xport_chan_sid(stream_i, true, data_sid);
+        my_streamer->set_enable_trailer(false); //TODO not implemented trailer support yet
+
+        //Store a weak pointer to prevent a streamer->x300_impl->streamer circular dependency
+        mb.tx_streamers[mb_chan] = boost::weak_ptr<sph::send_packet_streamer>(my_streamer);
+
+        //sets all tick and samp rates on this streamer
+        const fs_path mb_path = "/mboards/"+boost::lexical_cast<std::string>(mb_index);
+        _tree->access<double>(mb_path / "tick_rate").update();
+        _tree->access<double>(mb_path / "tx_dsps" / boost::lexical_cast<std::string>(mb_chan) / "rate" / "value").update();
+    }
+
+    return my_streamer;
+}
diff --git a/host/lib/usrp/x300/x300_regs.hpp b/host/lib/usrp/x300/x300_regs.hpp
new file mode 100644
index 000000000..e4ae76a38
--- /dev/null
+++ b/host/lib/usrp/x300/x300_regs.hpp
@@ -0,0 +1,152 @@
+//
+// Copyright 2013 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#ifndef INCLUDED_X300_REGS_HPP
+#define INCLUDED_X300_REGS_HPP
+
+#include <boost/cstdint.hpp>
+
+#define TOREG(x) ((x)*4)
+
+#define localparam static const int
+
+localparam SR_DACSYNC   = 5;
+localparam SR_LOOPBACK  = 6;
+localparam SR_TEST      = 7;
+localparam SR_SPI       = 8;
+localparam SR_GPIO      = 16;
+localparam SR_MISC_OUTS = 24;
+localparam SR_READBACK  = 32;
+localparam SR_TX_CTRL   = 64;
+localparam SR_RX_CTRL   = 96;
+localparam SR_TIME      = 128;
+localparam SR_RX_DSP    = 144;
+localparam SR_TX_DSP    = 184;
+localparam SR_LEDS      = 196;
+localparam SR_FP_GPIO   = 200;
+localparam SR_RX_FRONT  = 208;
+localparam SR_TX_FRONT  = 216;
+
+localparam RB32_GPIO            = 0;
+localparam RB32_SPI             = 4;
+localparam RB64_TIME_NOW        = 8;
+localparam RB64_TIME_PPS        = 16;
+localparam RB32_TEST            = 24;
+localparam RB32_RX              = 28;
+localparam RB32_FP_GPIO         = 32;
+
+localparam BL_ADDRESS     = 0;
+localparam BL_DATA        = 1;
+
+//wishbone settings map - relevant to host code
+#define SET0_BASE 0xa000
+#define SETXB_BASE 0xb000
+#define BOOT_LDR_BASE 0xFA00
+#define I2C0_BASE 0xfe00
+#define I2C1_BASE 0xff00
+#define SR_ADDR(base, offset) ((base) + (offset)*4)
+
+localparam ZPU_SR_LEDS       = 00;
+localparam ZPU_SR_PHY_RST    = 01;
+localparam ZPU_SR_CLOCK_CTRL = 02;
+localparam ZPU_SR_XB_LOCAL   = 03;
+localparam ZPU_SR_SPI        = 32;
+localparam ZPU_SR_ETHINT0    = 40;
+localparam ZPU_SR_ETHINT1    = 56;
+
+localparam ZPU_RB_SPI = 2;
+localparam ZPU_RB_CLK_STATUS = 3;
+localparam ZPU_RB_COMPAT_NUM = 6;
+localparam ZPU_RB_ETH_TYPE0  = 4;
+localparam ZPU_RB_ETH_TYPE1  = 5;
+
+//spi slaves on radio
+#define DB_DAC_SEN (1 << 7)
+#define DB_ADC_SEN (1 << 6)
+#define DB_RX_LSADC_SEN (1 << 5)
+#define DB_RX_LSDAC_SEN (1 << 4)
+#define DB_TX_LSADC_SEN (1 << 3)
+#define DB_TX_LSDAC_SEN (1 << 2)
+#define DB_RX_SEN (1 << 1)
+#define DB_TX_SEN (1 << 0)
+
+//-------------------------------------------------------------------
+// PCIe Registers
+//-------------------------------------------------------------------
+
+static const uint32_t X300_PCIE_VID         = 0x1093;
+static const uint32_t X300_PCIE_PID         = 0xC4C4;
+static const uint32_t X300_USRP_PCIE_SSID   = 0x7736;
+static const uint32_t X310_USRP_PCIE_SSID   = 0x76CA;
+static const uint32_t X310_2940R_PCIE_SSID  = 0x772B;
+static const uint32_t X310_2942R_PCIE_SSID  = 0x772C;
+static const uint32_t X310_2943R_PCIE_SSID  = 0x772D;
+static const uint32_t X310_2944R_PCIE_SSID  = 0x772E;
+static const uint32_t X310_2950R_PCIE_SSID  = 0x772F;
+static const uint32_t X310_2952R_PCIE_SSID  = 0x7730;
+static const uint32_t X310_2953R_PCIE_SSID  = 0x7731;
+static const uint32_t X310_2954R_PCIE_SSID  = 0x7732;
+
+static const uint32_t FPGA_X3xx_SIG_VALUE   = 0x58333030;
+
+static const uint32_t PCIE_FPGA_ADDR_BASE   = 0xC0000;
+#define PCIE_FPGA_REG(X)                    (PCIE_FPGA_ADDR_BASE + X)
+
+static const uint32_t FPGA_PCIE_SIG_REG     = PCIE_FPGA_REG(0x0000);
+static const uint32_t FPGA_CNTR_LO_REG      = PCIE_FPGA_REG(0x0004);
+static const uint32_t FPGA_CNTR_HI_REG      = PCIE_FPGA_REG(0x0008);
+static const uint32_t FPGA_CNTR_FREQ_REG    = PCIE_FPGA_REG(0x000C);
+static const uint32_t FPGA_USR_SIG_REG_BASE = PCIE_FPGA_REG(0x0030);
+static const uint32_t FPGA_USR_SIG_REG_SIZE = 16;
+
+static const uint32_t PCIE_TX_DMA_REG_BASE  = PCIE_FPGA_REG(0x0200);
+static const uint32_t PCIE_RX_DMA_REG_BASE  = PCIE_FPGA_REG(0x0400);
+
+static const uint32_t DMA_REG_GRP_SIZE      = 16;
+static const uint32_t DMA_CTRL_STATUS_REG   = 0x0;
+static const uint32_t DMA_FRAME_SIZE_REG    = 0x4;
+static const uint32_t DMA_SAMPLE_COUNT_REG  = 0x8;
+static const uint32_t DMA_PKT_COUNT_REG     = 0xC;
+
+#define PCIE_TX_DMA_REG(REG, CHAN)          (PCIE_TX_DMA_REG_BASE + (CHAN*DMA_REG_GRP_SIZE) + REG)
+#define PCIE_RX_DMA_REG(REG, CHAN)          (PCIE_RX_DMA_REG_BASE + (CHAN*DMA_REG_GRP_SIZE) + REG)
+
+static const uint32_t DMA_CTRL_RESET        = 1;
+static const uint32_t DMA_CTRL_SW_BUF_U64   = (3 << 4);
+static const uint32_t DMA_CTRL_SW_BUF_U32   = (2 << 4);
+static const uint32_t DMA_CTRL_SW_BUF_U16   = (1 << 4);
+static const uint32_t DMA_CTRL_SW_BUF_U8    = (0 << 4);
+static const uint32_t DMA_STATUS_ERROR      = 1;
+
+static const uint32_t PCIE_ROUTER_REG_BASE  = PCIE_FPGA_REG(0x0500);
+#define PCIE_ROUTER_REG(X)                  (PCIE_ROUTER_REG_BASE + X)
+
+static const uint32_t PCIE_ZPU_DATA_BASE    = 0x30000;
+static const uint32_t PCIE_ZPU_READ_BASE    = 0x20000;  //Trig and Status share the same base
+static const uint32_t PCIE_ZPU_STATUS_BASE  = 0x20000;
+
+#define PCIE_ZPU_DATA_REG(X)                (PCIE_FPGA_REG(PCIE_ZPU_DATA_BASE) + X)
+#define PCIE_ZPU_READ_REG(X)                (PCIE_FPGA_REG(PCIE_ZPU_READ_BASE) + X)
+#define PCIE_ZPU_STATUS_REG(X)              (PCIE_FPGA_REG(PCIE_ZPU_STATUS_BASE) + X)
+
+static const uint32_t PCIE_ZPU_READ_START       = 0x0;
+static const uint32_t PCIE_ZPU_READ_CLOBBER     = 0x80000000;
+static const uint32_t PCIE_ZPU_STATUS_BUSY      = 0x1;
+static const uint32_t PCIE_ZPU_STATUS_SUSPENDED = 0x80000000;
+
+
+#endif /* INCLUDED_X300_REGS_HPP */
diff --git a/host/lib/utils/CMakeLists.txt b/host/lib/utils/CMakeLists.txt
index a28e1f9ef..2252f3221 100644
--- a/host/lib/utils/CMakeLists.txt
+++ b/host/lib/utils/CMakeLists.txt
@@ -87,6 +87,7 @@ CHECK_CXX_SOURCE_COMPILES("
 UNSET(CMAKE_REQUIRED_LIBRARIES)
 
 CHECK_CXX_SOURCE_COMPILES("
+    #define WIN32_LEAN_AND_MEAN
     #include <windows.h>
     int main(){
         LoadLibrary(0);
@@ -136,6 +137,7 @@ LIBUHD_APPEND_SOURCES(
     ${CMAKE_CURRENT_SOURCE_DIR}/log.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/msg.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/paths.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/platform.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/static.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/tasks.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/thread_priority.cpp
diff --git a/host/lib/utils/platform.cpp b/host/lib/utils/platform.cpp
new file mode 100644
index 000000000..e2f92039e
--- /dev/null
+++ b/host/lib/utils/platform.cpp
@@ -0,0 +1,58 @@
+//
+// Copyright 2010-2012 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/utils/platform.hpp>
+#include <uhd/config.hpp>
+#include <boost/functional/hash.hpp>
+#ifdef UHD_PLATFORM_WIN32
+#include <Windows.h>
+#else
+#include <unistd.h>
+#endif
+
+namespace uhd {
+
+    boost::int32_t get_process_id() {
+#ifdef UHD_PLATFORM_WIN32
+    return boost::int32_t(GetCurrentProcessId());
+#else
+    return boost::int32_t(getpid());
+#endif
+    }
+
+    boost::uint32_t get_host_id() {
+#ifdef UHD_PLATFORM_WIN32
+        //extract volume serial number
+        char szVolName[MAX_PATH+1], szFileSysName[MAX_PATH+1];
+        DWORD dwSerialNumber, dwMaxComponentLen, dwFileSysFlags;
+        GetVolumeInformation("C:\\", szVolName, MAX_PATH,
+            &dwSerialNumber, &dwMaxComponentLen,
+            &dwFileSysFlags, szFileSysName, sizeof(szFileSysName));
+
+        return boost::uint32_t(dwSerialNumber);
+#else
+        return boost::uint32_t(gethostid());
+#endif
+    }
+
+    boost::uint32_t get_process_hash() {
+        size_t hash = 0;
+        boost::hash_combine(hash, uhd::get_process_id());
+        boost::hash_combine(hash, uhd::get_host_id());
+        return boost::uint32_t(hash);
+    }
+}
diff --git a/host/tests/convert_test.cpp b/host/tests/convert_test.cpp
index 4b0226e3d..8ef1e74cc 100644
--- a/host/tests/convert_test.cpp
+++ b/host/tests/convert_test.cpp
@@ -50,8 +50,8 @@ template <typename Range> static void loopback(
     const int prio_in = -1,
     const int prio_out = -1
 ){
-    //item32 is largest device type
-    std::vector<boost::uint32_t> interm(nsamps);
+    //make this buffer large enough for all test types
+    std::vector<boost::uint64_t> interm(nsamps);
 
     std::vector<const void *> input0(1, &input[0]), input1(1, &interm[0]);
     std::vector<void *> output0(1, &interm[0]), output1(1, &output[0]);
@@ -148,8 +148,8 @@ static void test_convert_types_for_floats(
     BOOST_FOREACH(const int_pair_t &prio, prios){
         loopback(nsamps, in_id, out_id, input, output, prio.first, prio.second);
         for (size_t i = 0; i < nsamps; i++){
-            MY_CHECK_CLOSE(input[i].real(), output[i].real(), value_type(1./32767));
-            MY_CHECK_CLOSE(input[i].imag(), output[i].imag(), value_type(1./32767));
+            MY_CHECK_CLOSE(input[i].real(), output[i].real(), value_type(1./(1 << 14)));
+            MY_CHECK_CLOSE(input[i].imag(), output[i].imag(), value_type(1./(1 << 14)));
         }
     }
 }
@@ -207,6 +207,66 @@ BOOST_AUTO_TEST_CASE(test_convert_types_le_fc64){
 }
 
 /***********************************************************************
+ * Test float to/from sc12 conversion loopback
+ **********************************************************************/
+
+BOOST_AUTO_TEST_CASE(test_convert_types_le_sc12_with_fc32){
+    convert::id_type id;
+    id.input_format = "fc32";
+    id.num_inputs = 1;
+    id.output_format = "sc12_item32_le";
+    id.num_outputs = 1;
+
+    //try various lengths to test edge cases
+    for (size_t nsamps = 1; nsamps < 16; nsamps++){
+        test_convert_types_for_floats<fc32_t>(nsamps, id, 1./16);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_convert_types_be_sc12_with_fc32){
+    convert::id_type id;
+    id.input_format = "fc32";
+    id.num_inputs = 1;
+    id.output_format = "sc12_item32_be";
+    id.num_outputs = 1;
+
+    //try various lengths to test edge cases
+    for (size_t nsamps = 1; nsamps < 16; nsamps++){
+        test_convert_types_for_floats<fc32_t>(nsamps, id, 1./16);
+    }
+}
+
+/***********************************************************************
+ * Test float to/from fc32 conversion loopback
+ **********************************************************************/
+
+BOOST_AUTO_TEST_CASE(test_convert_types_le_fc32_with_fc32){
+    convert::id_type id;
+    id.input_format = "fc32";
+    id.num_inputs = 1;
+    id.output_format = "fc32_item32_le";
+    id.num_outputs = 1;
+
+    //try various lengths to test edge cases
+    for (size_t nsamps = 1; nsamps < 16; nsamps++){
+        test_convert_types_for_floats<fc32_t>(nsamps, id);
+    }
+}
+
+BOOST_AUTO_TEST_CASE(test_convert_types_be_fc32_with_fc32){
+    convert::id_type id;
+    id.input_format = "fc32";
+    id.num_inputs = 1;
+    id.output_format = "fc32_item32_be";
+    id.num_outputs = 1;
+
+    //try various lengths to test edge cases
+    for (size_t nsamps = 1; nsamps < 16; nsamps++){
+        test_convert_types_for_floats<fc32_t>(nsamps, id);
+    }
+}
+
+/***********************************************************************
  * Test float to short conversion loopback
  **********************************************************************/
 BOOST_AUTO_TEST_CASE(test_convert_types_fc32_to_sc16){
diff --git a/host/tests/sph_recv_test.cpp b/host/tests/sph_recv_test.cpp
index 316e24779..5dd0761db 100644
--- a/host/tests/sph_recv_test.cpp
+++ b/host/tests/sph_recv_test.cpp
@@ -227,6 +227,7 @@ BOOST_AUTO_TEST_CASE(test_sph_recv_one_channel_sequence_error){
         if (i == NUM_PKTS_TO_TEST/2){
             //must get the soft overflow here
             BOOST_REQUIRE(metadata.error_code == uhd::rx_metadata_t::ERROR_CODE_OVERFLOW);
+            BOOST_REQUIRE(metadata.out_of_sequence == true);
             BOOST_CHECK_TS_CLOSE(metadata.time_spec, uhd::time_spec_t::from_ticks(num_accum_samps, SAMP_RATE));
             num_accum_samps += 10 + i%10;
         }
@@ -495,6 +496,7 @@ BOOST_AUTO_TEST_CASE(test_sph_recv_multi_channel_sequence_error){
         if (i == NUM_PKTS_TO_TEST/2){
             //must get the soft overflow here
             BOOST_REQUIRE(metadata.error_code == uhd::rx_metadata_t::ERROR_CODE_OVERFLOW);
+            BOOST_REQUIRE(metadata.out_of_sequence == true);
             BOOST_CHECK_TS_CLOSE(metadata.time_spec, uhd::time_spec_t::from_ticks(num_accum_samps, SAMP_RATE));
             num_accum_samps += 10 + i%10;
         }
diff --git a/host/utils/CMakeLists.txt b/host/utils/CMakeLists.txt
index abf2a546b..7604a7d37 100644
--- a/host/utils/CMakeLists.txt
+++ b/host/utils/CMakeLists.txt
@@ -1,5 +1,5 @@
 #
-# Copyright 2010-2012 Ettus Research LLC
+# Copyright 2010-2013 Ettus Research LLC
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -15,6 +15,8 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+SET(CMAKE_C_COMPILE_OBJECT ${CMAKE_CXX_COMPILE_OBJECT})
+
 ########################################################################
 # Utilities that get installed into the runtime path
 ########################################################################
@@ -25,6 +27,12 @@ SET(util_runtime_sources
     uhd_cal_tx_dc_offset.cpp
     uhd_cal_tx_iq_balance.cpp
     usrp_n2xx_simple_net_burner.cpp
+    nirio_programmer.cpp
+)
+
+SET(x3xx_burner_sources
+    usrp_x3xx_fpga_burner.cpp
+    cdecode.c
 )
 
 #for each source: build an executable and install
@@ -35,6 +43,10 @@ FOREACH(util_source ${util_runtime_sources})
     UHD_INSTALL(TARGETS ${util_name} RUNTIME DESTINATION ${RUNTIME_DIR} COMPONENT utilities)
 ENDFOREACH(util_source)
 
+ADD_EXECUTABLE(usrp_x3xx_fpga_burner ${x3xx_burner_sources})
+TARGET_LINK_LIBRARIES(usrp_x3xx_fpga_burner uhd ${Boost_LIBRARIES})
+UHD_INSTALL(TARGETS usrp_x3xx_fpga_burner RUNTIME DESTINATION ${RUNTIME_DIR} COMPONENT utilities)
+
 ########################################################################
 # Utilities that get installed into the share path
 ########################################################################
@@ -43,7 +55,6 @@ SET(util_share_sources
     usrp_burn_db_eeprom.cpp
     usrp_burn_mb_eeprom.cpp
 )
-
 IF(ENABLE_USB)
     LIST(APPEND util_share_sources
         fx2_init_eeprom.cpp
@@ -71,6 +82,7 @@ FOREACH(util_source ${util_share_sources})
 ENDFOREACH(util_source)
 
 UHD_INSTALL(TARGETS usrp_n2xx_simple_net_burner RUNTIME DESTINATION ${PKG_LIB_DIR}/utils COMPONENT utilities)
+UHD_INSTALL(TARGETS usrp_x3xx_fpga_burner RUNTIME DESTINATION ${PKG_LIB_DIR}/utils COMPONENT utilities)
 
 #UHD images downloader configuration
 CONFIGURE_FILE(
diff --git a/host/utils/cdecode.c b/host/utils/cdecode.c
new file mode 100644
index 000000000..0a9b5c46b
--- /dev/null
+++ b/host/utils/cdecode.c
@@ -0,0 +1,80 @@
+/*

+cdecoder.c - c source to a base64 decoding algorithm implementation

+

+This is part of the libb64 project, and has been placed in the public domain.

+For details, see http://sourceforge.net/projects/libb64

+*/

+

+#include "cdecode.h"

+

+int base64_decode_value(char value_in){

+    static const char decoding[] = {62,-1,-1,-1,63,52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-2,-1,-1,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,-1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51};

+    static const char decoding_size = sizeof(decoding);

+    value_in -= 43;

+    if ((signed char)value_in < 0 || value_in > decoding_size) return -1;

+    return decoding[(int)value_in];

+}

+

+void base64_init_decodestate(base64_decodestate* state_in){

+    state_in->step = step_a;

+    state_in->plainchar = 0;

+}

+

+size_t base64_decode_block(const char* code_in, const size_t length_in, char* plaintext_out, base64_decodestate* state_in){

+    const char* codechar = code_in;

+    char* plainchar = plaintext_out;

+    char fragment;

+    

+    *plainchar = state_in->plainchar;

+    

+    switch (state_in->step){

+        while (1){

+            case step_a:

+                do{

+                    if (codechar == code_in+length_in){

+                        state_in->step = step_a;

+                        state_in->plainchar = *plainchar;

+                        return plainchar - plaintext_out;

+                    }

+                    fragment = (char)base64_decode_value(*codechar++);

+                } while ((signed char)fragment < 0);

+                *plainchar = (fragment & 0x03f) << 2;

+

+            case step_b:

+                do{

+                    if (codechar == code_in+length_in){

+                        state_in->step = step_b;

+                        state_in->plainchar = *plainchar;

+                        return plainchar - plaintext_out;

+                    }

+                    fragment = (char)base64_decode_value(*codechar++);

+                } while ((signed char)fragment < 0);

+                *plainchar++ |= (fragment & 0x030) >> 4;

+                *plainchar    = (fragment & 0x00f) << 4;

+            case step_c:

+                do{

+                    if (codechar == code_in+length_in)

+                    {

+                        state_in->step = step_c;

+                        state_in->plainchar = *plainchar;

+                        return plainchar - plaintext_out;

+                    }

+                    fragment = (char)base64_decode_value(*codechar++);

+                } while ((signed char)fragment < 0);

+                *plainchar++ |= (fragment & 0x03c) >> 2;

+                *plainchar    = (fragment & 0x003) << 6;

+            case step_d:

+                do{

+                    if (codechar == code_in+length_in){

+                        state_in->step = step_d;

+                        state_in->plainchar = *plainchar;

+                        return plainchar - plaintext_out;

+                    }

+                    fragment = (char)base64_decode_value(*codechar++);

+                } while ((signed char)fragment < 0);

+                *plainchar++   |= (fragment & 0x03f);

+        }

+    }

+    /* control should not reach here */

+    return plainchar - plaintext_out;

+}

diff --git a/host/utils/cdecode.h b/host/utils/cdecode.h
new file mode 100644
index 000000000..e1eee301f
--- /dev/null
+++ b/host/utils/cdecode.h
@@ -0,0 +1,28 @@
+/*
+cdecode.h - c header for a base64 decoding algorithm
+
+This is part of the libb64 project, and has been placed in the public domain.
+For details, see http://sourceforge.net/projects/libb64
+*/
+
+#ifndef BASE64_CDECODE_H
+#define BASE64_CDECODE_H
+
+#include <stddef.h>
+
+typedef enum{
+    step_a, step_b, step_c, step_d
+} base64_decodestep;
+
+typedef struct{
+    base64_decodestep step;
+    char plainchar;
+} base64_decodestate;
+
+void base64_init_decodestate(base64_decodestate* state_in);
+
+int base64_decode_value(char value_in);
+
+size_t base64_decode_block(const char* code_in, const size_t length_in, char* plaintext_out, base64_decodestate* state_in);
+
+#endif /* BASE64_CDECODE_H */
diff --git a/host/utils/nirio_programmer.cpp b/host/utils/nirio_programmer.cpp
new file mode 100644
index 000000000..98db862eb
--- /dev/null
+++ b/host/utils/nirio_programmer.cpp
@@ -0,0 +1,275 @@
+
+#include <uhd/transport/nirio/niusrprio_session.h>
+#include <uhd/transport/nirio/niriok_proxy.h>
+#include <uhd/transport/nirio/nifpga_lvbitx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <iostream>
+#include <fstream>
+#include <streambuf>
+#include <boost/program_options.hpp>
+#include <boost/format.hpp>
+#include <boost/thread/thread.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/regex.hpp>
+
+using namespace uhd::niusrprio;
+using namespace uhd::usrprio_rpc;
+
+class dummy_lvbitx : public nifpga_lvbitx {
+public:
+    dummy_lvbitx(const std::string& fpga_lvbitx_path) : _fpga_lvbitx_path(fpga_lvbitx_path) {
+        std::ifstream lvbitx_stream(_fpga_lvbitx_path.c_str());
+        if (lvbitx_stream.is_open()) {
+            std::string lvbitx_contents;
+            lvbitx_stream.seekg(0, std::ios::end);
+            lvbitx_contents.reserve(static_cast<size_t>(lvbitx_stream.tellg()));
+            lvbitx_stream.seekg(0, std::ios::beg);
+            lvbitx_contents.assign((std::istreambuf_iterator<char>(lvbitx_stream)), std::istreambuf_iterator<char>());
+            try {
+                boost::smatch md5_match;
+                if (boost::regex_search(lvbitx_contents, md5_match, boost::regex("<BitstreamMD5>([a-zA-Z0-9]{32})<\\/BitstreamMD5>", boost::regex::icase))) {
+                    _bitstream_checksum = std::string(md5_match[1].first, md5_match[1].second);
+                }
+                boost::to_upper(_bitstream_checksum);
+            } catch (boost::exception&) {
+                _bitstream_checksum = "";
+            }
+            try {
+                boost::smatch sig_match;
+                if (boost::regex_search(lvbitx_contents, sig_match, boost::regex("<SignatureRegister>([a-zA-Z0-9]{32})<\\/SignatureRegister>", boost::regex::icase))) {
+                    _signature = std::string(sig_match[1].first, sig_match[1].second);
+                }
+                boost::to_upper(_signature);
+            } catch (boost::exception&) {
+                _signature = "";
+            }
+        }
+    }
+    ~dummy_lvbitx() {}
+
+    virtual const char* get_bitfile_path() { return _fpga_lvbitx_path.c_str(); }
+    virtual const char* get_signature() { return _signature.c_str(); }
+    virtual const char* get_bitstream_checksum() { return _bitstream_checksum.c_str(); }
+
+    virtual size_t get_input_fifo_count() { return 0; }
+    virtual const char** get_input_fifo_names() { return NULL; }
+
+    virtual size_t get_output_fifo_count() { return 0; }
+    virtual const char** get_output_fifo_names() { return NULL; }
+
+    virtual size_t get_control_count() { return 0; }
+    virtual const char** get_control_names() { return NULL; }
+
+    virtual size_t get_indicator_count() { return 0; }
+    virtual const char** get_indicator_names() { return NULL; }
+
+    virtual void init_register_info(nirio_register_info_vtr& vtr) { vtr.clear(); }
+    virtual void init_fifo_info(nirio_fifo_info_vtr& vtr) { vtr.clear(); }
+
+private:
+    std::string _fpga_lvbitx_path;
+    std::string _bitstream_checksum;
+    std::string _signature;
+};
+
+int main(int argc, char *argv[])
+{
+    nirio_status status = NiRio_Status_Success;
+
+    //Setup the program options
+    uint32_t interface_num, peek_addr, poke_addr, poke_data;
+    std::string rpc_port, fpga_lvbitx_path, flash_path, peek_tokens_str, poke_tokens_str;
+
+    namespace po = boost::program_options;
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "help message")
+        ("interface", po::value<uint32_t>(&interface_num)->default_value(0), "The interface number to communicate with.")
+        ("port", po::value<std::string>(&rpc_port)->default_value("5444"), "Port to communicate with RPC server.")
+        ("fpga", po::value<std::string>(&fpga_lvbitx_path)->default_value(""), "The absolute path to the LVBITX file to download to the FPGA.")
+        ("flash", po::value<std::string>(&flash_path)->default_value(""), "The path to the image to download to the flash OR 'erase' to erase the FPGA image from flash.")
+        ("peek", po::value<std::string>(&peek_tokens_str)->default_value(""), "Peek32.")
+        ("poke", po::value<std::string>(&poke_tokens_str)->default_value(""), "Poke32.")
+        ("stats", "Dump interface and DMA stats.")
+    ;
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+
+    //Print the help message
+    if (vm.count("help")){
+        std::cout << boost::format("USRP-NIRIO-Programmer\n\n %s") % desc << std::endl;
+        return ~0;
+    }
+
+    std::string resource_name = boost::str(boost::format("RIO%u") % interface_num);
+
+    //Download LVBITX image
+    if (fpga_lvbitx_path != "")
+    {
+        printf("Downloading image %s to FPGA as %s...", fpga_lvbitx_path.c_str(), resource_name.c_str());
+        fflush(stdout);
+        uhd::niusrprio::niusrprio_session fpga_session(resource_name, rpc_port);
+        uhd::niusrprio::nifpga_lvbitx::sptr lvbitx(new dummy_lvbitx(fpga_lvbitx_path));
+        nirio_status_chain(fpga_session.open(lvbitx, true), status);
+        //Download BIN to flash or erase
+        if (flash_path != "erase") {
+            if (flash_path != "") {
+                printf("Writing FPGA image %s to flash...", flash_path.c_str());
+                fflush(stdout);
+                nirio_status_chain(fpga_session.download_bitstream_to_flash(flash_path), status);
+                printf("DONE\n");
+            }
+        } else {
+            printf("Erasing FPGA image from flash...");
+            fflush(stdout);
+            nirio_status_chain(fpga_session.download_bitstream_to_flash(""), status);
+            printf("DONE\n");
+        }
+        fpga_session.close();
+        printf("DONE\n");
+    }
+
+    fflush(stdout);
+    usrprio_rpc_client temp_rpc_client("localhost", rpc_port);
+    std::string interface_path;
+    nirio_status_chain(temp_rpc_client.niusrprio_get_interface_path(resource_name, interface_path), status);
+    if (interface_path.empty()) {
+        printf("ERROR: Could not open a proxy to interface %u. If it exists, try downloading an LVBITX to the FPGA first.\n", interface_num);
+        exit(EXIT_FAILURE);
+    }
+
+    niriok_proxy dev_proxy;
+    dev_proxy.open(interface_path);
+
+    if (poke_tokens_str != ""){
+        std::stringstream ss;
+        std::vector<std::string> poke_tokens;
+        boost::split(poke_tokens, poke_tokens_str, boost::is_any_of(":"));
+        ss.clear();
+        ss << std::hex << poke_tokens[1];
+        ss >> poke_addr;
+        ss.clear();
+        ss << std::hex << poke_tokens[2];
+        ss >> poke_data;
+
+        niriok_scoped_addr_space(dev_proxy, poke_tokens[0]=="c"?BUS_INTERFACE:FPGA, status);
+        if (poke_tokens[0]=="z") {
+            nirio_status_chain(dev_proxy.poke(poke_addr, (uint32_t)0x70000 + poke_addr), status);
+        } else {
+            nirio_status_chain(dev_proxy.poke(poke_addr, poke_data), status);
+        }
+        printf("[POKE] %s:0x%x <= 0x%x (%u)\n", poke_tokens[0]=="c"?"Chinch":(poke_tokens[0]=="z"?"ZPU":"FPGA"), poke_addr, poke_data, poke_data);
+    }
+
+    if (peek_tokens_str != ""){
+        std::stringstream ss;
+        std::vector<std::string> peek_tokens;
+        boost::split(peek_tokens, peek_tokens_str, boost::is_any_of(":"));
+        ss.clear();
+        ss << std::hex << peek_tokens[1];
+        ss >> peek_addr;
+
+        niriok_scoped_addr_space(dev_proxy, peek_tokens[0]=="c"?BUS_INTERFACE:FPGA, status);
+        uint32_t reg_val;
+        if (peek_tokens[0]=="z") {
+            nirio_status_chain(dev_proxy.poke((uint32_t)0x60000 + peek_addr, (uint32_t)0), status);
+            do {
+                nirio_status_chain(dev_proxy.peek((uint32_t)0x60000 + peek_addr, reg_val), status);
+            } while (reg_val != 0);
+            nirio_status_chain(dev_proxy.peek((uint32_t)0x70000 + peek_addr, reg_val), status);
+        } else {
+            nirio_status_chain(dev_proxy.peek(peek_addr, reg_val), status);
+        }
+
+        printf("[PEEK] %s:0x%x = 0x%x (%u)\n", peek_tokens[0]=="c"?"Chinch":(peek_tokens[0]=="z"?"ZPU":"FPGA"), peek_addr, reg_val, reg_val);
+    }
+
+    //Display attributes
+    if (vm.count("stats")){
+        printf("[Interface %u]\n", interface_num);
+        uint32_t attr_val;
+        nirio_status_chain(dev_proxy.get_attribute(IS_FPGA_PROGRAMMED, attr_val), status);
+        printf("* Is FPGA Programmed? = %s\n", (attr_val==1)?"YES":"NO");
+
+        std::string signature;
+        for (int i = 0; i < 4; i++) {
+            nirio_status_chain(dev_proxy.peek(0x3FFF4, attr_val), status);
+            signature += boost::str(boost::format("%08x") % attr_val);
+        }
+        printf("* FPGA Signature = %s\n", signature.c_str());
+
+        std::string checksum;
+        for (int i = 0; i < 4; i++) {
+            nirio_status_chain(dev_proxy.peek(0x40030 + (i * 4), attr_val), status);
+            checksum += boost::str(boost::format("%08x") % attr_val);
+        }
+        printf("* FPGA Bitstream Checksum = %s\n", checksum.c_str());
+
+        uint32_t reg_val;
+        nirio_status_chain(dev_proxy.set_attribute(ADDRESS_SPACE, BUS_INTERFACE), status);
+        nirio_status_chain(dev_proxy.peek(0, reg_val), status);
+        printf("* Chinch Signature = %x\n", reg_val);
+        nirio_status_chain(dev_proxy.set_attribute(ADDRESS_SPACE, FPGA), status);
+        nirio_status_chain(dev_proxy.peek(0, reg_val), status);
+        printf("* PCIe FPGA Signature = %x\n", reg_val);
+
+        printf("\n[DMA Stream Stats]\n");
+
+        nirio_status_chain(dev_proxy.set_attribute(ADDRESS_SPACE, FPGA), status);
+
+        printf("------------------------------------------------------------------------------------------------");
+        printf("\nChannel =>       |");
+        for (uint32_t i = 0; i < 6; i++) {
+            printf("%11u |", i);
+        }
+        printf("\n------------------------------------------------------------------------------------------------");
+        printf("\nTX Status        |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x40200 + (i * 16), reg_val), status);
+            printf("%s |", reg_val==0 ? "       Good" : "      Error");
+        }
+        printf("\nRX Status        |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x40400 + (i * 16), reg_val), status);
+            printf("%s |", reg_val==0 ? "       Good" : "      Error");
+        }
+        printf("\nTX Frm Size      |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x40204 + (i * 16), reg_val), status);
+            printf("%11u |", reg_val);
+        }
+        printf("\nRX Frm Size      |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x40404 + (i * 16), reg_val), status);
+            printf("%11u |", reg_val);
+        }
+        printf("\nTX Pkt Count     |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x4020C + (i * 16), reg_val), status);
+            printf("%11u |", reg_val);
+        }
+        printf("\nTX Samp Count    |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x40208 + (i * 16), reg_val), status);
+            printf("%11u |", reg_val);
+        }
+        printf("\nRX Pkt Count     |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x4040C + (i * 16), reg_val), status);
+            printf("%11u |", reg_val);
+        }
+        printf("\nRX Samp Count    |");
+        for (uint32_t i = 0; i < 6; i++) {
+            nirio_status_chain(dev_proxy.peek(0x40408 + (i * 16), reg_val), status);
+            printf("%11u |", reg_val);
+        }
+        printf("\n------------------------------------------------------------------------------------------------\n");
+    }
+
+    exit(EXIT_SUCCESS);
+}
+
+
diff --git a/host/utils/usrp_cal_utils.hpp b/host/utils/usrp_cal_utils.hpp
index bab6ddd91..40626dfaa 100644
--- a/host/utils/usrp_cal_utils.hpp
+++ b/host/utils/usrp_cal_utils.hpp
@@ -53,7 +53,7 @@ static inline void set_optimum_defaults(uhd::usrp::multi_usrp::sptr usrp){
 
     const uhd::fs_path mb_path = "/mboards/0";
     const std::string mb_name = tree->access<std::string>(mb_path / "name").get();
-    if (mb_name.find("USRP2") != std::string::npos or mb_name.find("N200") != std::string::npos or mb_name.find("N210") != std::string::npos){
+    if (mb_name.find("USRP2") != std::string::npos or mb_name.find("N200") != std::string::npos or mb_name.find("N210") != std::string::npos  or mb_name.find("X300") != std::string::npos  or mb_name.find("X310") != std::string::npos){
         usrp->set_tx_rate(12.5e6);
         usrp->set_rx_rate(12.5e6);
     }
diff --git a/host/utils/usrp_n2xx_simple_net_burner.cpp b/host/utils/usrp_n2xx_simple_net_burner.cpp
index 1898ee9ae..290612f8b 100644
--- a/host/utils/usrp_n2xx_simple_net_burner.cpp
+++ b/host/utils/usrp_n2xx_simple_net_burner.cpp
@@ -511,6 +511,8 @@ int UHD_SAFE_MAIN(int argc, char *argv[]){
         verify_image(udp_transport, true, fw_image, flash_info[1], fw_image_size);
     }
 
+    delete(flash_info);
+
     //Reset USRP N2XX
     bool reset = false;
     if(auto_reboot) reset = true;
diff --git a/host/utils/usrp_x3xx_fpga_burner.cpp b/host/utils/usrp_x3xx_fpga_burner.cpp
new file mode 100644
index 000000000..07bc63559
--- /dev/null
+++ b/host/utils/usrp_x3xx_fpga_burner.cpp
@@ -0,0 +1,498 @@
+//
+// Copyright 2013-2014 Ettus Research LLC
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <iostream>
+#include <map>
+#include <fstream>
+#include <stdexcept>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <vector>
+
+#include <boost/foreach.hpp>
+#include <boost/asio.hpp>
+#include <boost/program_options.hpp>
+#include <boost/property_tree/ptree.hpp>
+#include <boost/property_tree/xml_parser.hpp>
+#include <boost/assign.hpp>
+#include <boost/cstdint.hpp>
+#include <boost/assign/list_of.hpp>
+#include <boost/format.hpp>
+#include <boost/algorithm/string/erase.hpp>
+#include <boost/filesystem.hpp>
+#include <boost/thread/thread.hpp>
+
+#include <uhd/exception.hpp>
+#include <uhd/transport/if_addrs.hpp>
+#include <uhd/transport/nirio/niusrprio_session.h>
+#include <uhd/transport/udp_simple.hpp>
+#include <uhd/device.hpp>
+#include <uhd/types/device_addr.hpp>
+#include <uhd/utils/byteswap.hpp>
+#include <uhd/utils/images.hpp>
+#include <uhd/utils/safe_main.hpp>
+#include <uhd/utils/safe_call.hpp>
+
+#ifdef _MSC_VER
+extern "C" {
+#endif
+#include "cdecode.h"
+#ifdef _MSC_VER
+}
+#endif
+
+#define X300_FPGA_BIN_SIZE_BYTES 15877916
+#define X300_FPGA_BIT_MAX_SIZE_BYTES 15878022
+#define X300_FPGA_PROG_UDP_PORT 49157
+#define X300_FLASH_SECTOR_SIZE 131072
+#define X300_PACKET_SIZE_BYTES 256
+#define X300_FPGA_SECTOR_START 32
+#define X300_MAX_RESPONSE_BYTES 128
+#define UDP_TIMEOUT 3
+#define FPGA_LOAD_TIMEOUT 15
+
+#define X300_FPGA_PROG_FLAGS_ACK     1
+#define X300_FPGA_PROG_FLAGS_ERROR   2
+#define X300_FPGA_PROG_FLAGS_INIT    4
+#define X300_FPGA_PROG_FLAGS_CLEANUP 8
+#define X300_FPGA_PROG_FLAGS_ERASE   16
+#define X300_FPGA_PROG_FLAGS_VERIFY  32
+#define X300_FPGA_PROG_CONFIGURE     64
+#define X300_FPGA_PROG_CONFIG_STATUS 128
+
+namespace fs = boost::filesystem;
+namespace po = boost::program_options;
+
+using namespace uhd;
+using namespace uhd::transport;
+
+typedef struct {
+    boost::uint32_t flags;
+    boost::uint32_t sector;
+    boost::uint32_t index;
+    boost::uint32_t size;
+    boost::uint16_t data[128];
+} x300_fpga_update_data_t;
+
+boost::uint8_t x300_data_in_mem[udp_simple::mtu];
+boost::uint8_t intermediary_packet_data[X300_PACKET_SIZE_BYTES];
+
+boost::uint8_t bitswap(uint8_t b){
+    b = ((b & 0xF0) >> 4) | ((b & 0x0F) << 4);
+    b = ((b & 0xCC) >> 2) | ((b & 0x33) << 2);
+    b = ((b & 0xAA) >> 1) | ((b & 0x55) << 1);
+
+    return b;
+}
+
+void list_usrps(){
+    device_addrs_t found_devices = device::find(device_addr_t("type=x300"));
+
+    std::cout << "Available X3x0 devices:" << std::endl;
+    BOOST_FOREACH(const device_addr_t &dev, found_devices){
+        std::string dev_string;
+        if(dev.has_key("addr")){
+            dev_string = str(boost::format(" * %s (%s, addr: %s)")
+                                           % dev["product"]
+                                           % dev["fpga"]
+                                           % dev["addr"]);
+        }
+        else{
+            dev_string = str(boost::format(" * %s (%s, resource: %s)")
+                                           % dev["product"]
+                                           % dev["fpga"]
+                                           % dev["resource"]);
+        }
+        std::cout << dev_string << std::endl;
+    }
+}
+
+device_addr_t find_usrp_with_ethernet(std::string ip_addr, bool output){
+    if(output) std::cout << "Attempting to find X3x0 with IP address: " << ip_addr << std::endl;
+    const device_addr_t dev = device_addr_t(str(boost::format("addr=%s") % ip_addr));
+    device_addrs_t found_devices = device::find(dev);
+
+    if(found_devices.size() < 1) {
+        throw std::runtime_error("Could not find X3x0 with the specified address!");
+    }
+    else if(found_devices.size() > 1) {
+        throw std::runtime_error("Found multiple X3x0 units with the specified address!");
+    }
+    else {
+        if(output) std::cout << (boost::format("Found %s (%s).\n\n")
+                                 % found_devices[0]["product"]
+                                 % found_devices[0]["fpga"]);
+    }
+    return found_devices[0];
+}
+
+device_addr_t find_usrp_with_pcie(std::string resource, bool output){
+    if(output) std::cout << "Attempting to find X3x0 with resource: " << resource << std::endl;
+    const device_addr_t dev = device_addr_t(str(boost::format("resource=%s") % resource));
+    device_addrs_t found_devices = device::find(dev);
+
+    if(found_devices.size() < 1) {
+        throw std::runtime_error("Could not find X3x0 with the specified resource!");
+    }
+    else {
+        if(output) std::cout << (boost::format("Found %s (%s).\n\n")
+                                 % found_devices[0]["product"]
+                                 % found_devices[0]["fpga"]);
+    }
+    return found_devices[0];
+}
+
+std::string get_default_image_path(std::string model, std::string image_type){
+    std::transform(model.begin(), model.end(), model.begin(), ::tolower);
+
+    std::string image_name = str(boost::format("usrp_%s_fpga_%s.bit")
+                                            % model.c_str() % image_type.c_str());
+
+    return find_image_path(image_name);
+}
+
+void extract_from_lvbitx(std::string lvbitx_path, std::vector<char> &bitstream){
+    boost::property_tree::ptree pt;
+    boost::property_tree::xml_parser::read_xml(lvbitx_path.c_str(), pt,
+                                               boost::property_tree::xml_parser::no_comments |
+                                               boost::property_tree::xml_parser::trim_whitespace);
+    std::string const encoded_bitstream(pt.get<std::string>("Bitfile.Bitstream"));
+    std::vector<char> decoded_bitstream(encoded_bitstream.size());
+
+    base64_decodestate decode_state;
+    base64_init_decodestate(&decode_state);
+    size_t const decoded_size = base64_decode_block(encoded_bitstream.c_str(),
+                                encoded_bitstream.size(), &decoded_bitstream.front(), &decode_state);
+    decoded_bitstream.resize(decoded_size);
+    bitstream.swap(decoded_bitstream);
+}
+
+void ethernet_burn(udp_simple::sptr udp_transport, std::string fpga_path, bool verify){
+    boost::uint32_t max_size;
+    std::vector<char> bitstream;
+
+    if(fs::extension(fpga_path) == ".bit") max_size = X300_FPGA_BIT_MAX_SIZE_BYTES;
+    else max_size = X300_FPGA_BIN_SIZE_BYTES; //Use for both .bin and .lvbitx
+
+    bool is_lvbitx = (fs::extension(fpga_path) == ".lvbitx");
+
+    size_t fpga_image_size;
+    FILE* file;
+    if((file = fopen(fpga_path.c_str(), "rb"))){
+        fseek(file, 0, SEEK_END);
+        if(is_lvbitx){
+            extract_from_lvbitx(fpga_path, bitstream);
+            fpga_image_size = bitstream.size();
+        }
+        else fpga_image_size = ftell(file);
+        if(fpga_image_size > max_size){
+            fclose(file);
+            throw std::runtime_error(str(boost::format("FPGA size is too large (%d > %d).")
+                                         % fpga_image_size % max_size));
+        }
+        rewind(file);
+    }
+    else{
+        throw std::runtime_error(str(boost::format("Could not find FPGA image at location: %s")
+                                     % fpga_path.c_str()));
+    }
+
+    const x300_fpga_update_data_t *update_data_in = reinterpret_cast<const x300_fpga_update_data_t *>(x300_data_in_mem);
+
+    x300_fpga_update_data_t ack_packet;
+    ack_packet.flags = htonx<boost::uint32_t>(X300_FPGA_PROG_FLAGS_ACK | X300_FPGA_PROG_FLAGS_INIT);
+    ack_packet.sector = 0;
+    ack_packet.size = 0;
+    ack_packet.index = 0;
+    memset(ack_packet.data, 0, sizeof(ack_packet.data));
+    udp_transport->send(boost::asio::buffer(&ack_packet, sizeof(ack_packet)));
+
+    udp_transport->recv(boost::asio::buffer(x300_data_in_mem), UDP_TIMEOUT);
+    if((ntohl(update_data_in->flags) & X300_FPGA_PROG_FLAGS_ERROR) != X300_FPGA_PROG_FLAGS_ERROR){
+        std::cout << "Burning image: " << fpga_path << std::endl;
+        if(verify) std::cout << "NOTE: Verifying image. Burning will take much longer." << std::endl;
+        std::cout << std::endl;
+    }
+    else{
+        throw std::runtime_error("Failed to start image burning! Did you specify the correct IP address? If so, power-cycle the device and try again.");
+    }
+
+    std::cout << "Progress: " << std::flush;
+
+    int percentage = -1;
+    int last_percentage = -1;
+    size_t current_pos = 0;
+
+    //Each sector
+    for(size_t i = 0; i < fpga_image_size; i += X300_FLASH_SECTOR_SIZE){
+
+        //Print percentage at beginning of first sector after each 10%
+        percentage = int(double(i)/double(fpga_image_size)*100);
+        if((percentage != last_percentage) and (percentage % 10 == 0)){ //Don't print same percentage twice
+            std::cout << percentage << "%..." << std::flush;
+        }
+        last_percentage = percentage;
+
+        //Each packet
+        for(size_t j = i; (j < fpga_image_size and j < (i+X300_FLASH_SECTOR_SIZE)); j += X300_PACKET_SIZE_BYTES){
+            x300_fpga_update_data_t send_packet;
+
+            send_packet.flags = X300_FPGA_PROG_FLAGS_ACK;
+            if(verify) send_packet.flags |= X300_FPGA_PROG_FLAGS_VERIFY;
+            if(j == i) send_packet.flags |= X300_FPGA_PROG_FLAGS_ERASE; //Erase the sector before writing
+            send_packet.flags = htonx<boost::uint32_t>(send_packet.flags);
+            
+            send_packet.sector = htonx<boost::uint32_t>(X300_FPGA_SECTOR_START + (i/X300_FLASH_SECTOR_SIZE));
+            send_packet.index = htonx<boost::uint32_t>((j % X300_FLASH_SECTOR_SIZE) / 2);
+            send_packet.size = htonx<boost::uint32_t>(X300_PACKET_SIZE_BYTES / 2);
+            memset(intermediary_packet_data,0,X300_PACKET_SIZE_BYTES);
+            memset(send_packet.data,0,X300_PACKET_SIZE_BYTES);
+            if(!is_lvbitx) current_pos = ftell(file);
+
+            if(current_pos + X300_PACKET_SIZE_BYTES > fpga_image_size){
+                if(is_lvbitx){
+                    memcpy(intermediary_packet_data, (&bitstream[current_pos]), (bitstream.size()-current_pos+1));
+                }
+                else{
+                    size_t len = fread(intermediary_packet_data, sizeof(boost::uint8_t), (fpga_image_size-current_pos), file);
+                    if(len != (fpga_image_size-current_pos)){
+                        throw std::runtime_error("Error reading from file!");
+                    }
+                }
+            }
+            else{
+                if(is_lvbitx){
+                    memcpy(intermediary_packet_data, (&bitstream[current_pos]), X300_PACKET_SIZE_BYTES);
+                    current_pos += X300_PACKET_SIZE_BYTES;
+                }
+                else{
+                    size_t len = fread(intermediary_packet_data, sizeof(boost::uint8_t), X300_PACKET_SIZE_BYTES, file);
+                    if(len != X300_PACKET_SIZE_BYTES){
+                        throw std::runtime_error("Error reading from file!");
+                    }
+                }
+            }
+
+            for(size_t k = 0; k < X300_PACKET_SIZE_BYTES; k++){
+                intermediary_packet_data[k] = bitswap(intermediary_packet_data[k]);
+            }
+
+            memcpy(send_packet.data, intermediary_packet_data, X300_PACKET_SIZE_BYTES);
+
+            for(size_t k = 0; k < (X300_PACKET_SIZE_BYTES/2); k++){
+                send_packet.data[k] = htonx<boost::uint16_t>(send_packet.data[k]);
+            }
+           
+            udp_transport->send(boost::asio::buffer(&send_packet, sizeof(send_packet)));
+
+            udp_transport->recv(boost::asio::buffer(x300_data_in_mem), UDP_TIMEOUT);
+            const x300_fpga_update_data_t *update_data_in = reinterpret_cast<const x300_fpga_update_data_t *>(x300_data_in_mem);
+
+            if((ntohl(update_data_in->flags) & X300_FPGA_PROG_FLAGS_ERROR) == X300_FPGA_PROG_FLAGS_ERROR){
+                throw std::runtime_error("Transfer or data verification failed!");
+            }
+        }
+    }
+    fclose(file);
+
+    //Send clean-up signal
+    x300_fpga_update_data_t cleanup_packet;
+    cleanup_packet.flags = htonx<boost::uint32_t>(X300_FPGA_PROG_FLAGS_ACK | X300_FPGA_PROG_FLAGS_CLEANUP);
+    cleanup_packet.sector = 0;
+    cleanup_packet.size = 0;
+    cleanup_packet.index = 0;
+    memset(cleanup_packet.data, 0, sizeof(cleanup_packet.data));
+    udp_transport->send(boost::asio::buffer(&cleanup_packet, sizeof(cleanup_packet)));
+
+    udp_transport->recv(boost::asio::buffer(x300_data_in_mem), UDP_TIMEOUT);
+    const x300_fpga_update_data_t *cleanup_data_in = reinterpret_cast<const x300_fpga_update_data_t *>(x300_data_in_mem);
+
+    if((ntohl(cleanup_data_in->flags) & X300_FPGA_PROG_FLAGS_ERROR) == X300_FPGA_PROG_FLAGS_ERROR){
+        throw std::runtime_error("Transfer or data verification failed!");
+    }
+
+    std::cout << "100%" << std::endl;
+}
+
+void pcie_burn(std::string resource, std::string rpc_port, std::string fpga_path)
+{
+    std::cout << "Burning image: " << fpga_path << std::endl;
+    std::cout << "This will take 3-10 minutes." << std::endl;
+
+    nirio_status status = NiRio_Status_Success;
+
+    uhd::niusrprio::niusrprio_session fpga_session(resource, rpc_port);
+    nirio_status_chain(fpga_session.download_bitstream_to_flash(fpga_path), status);
+
+    if(nirio_status_fatal(status)) throw std::runtime_error("Failed to burn FPGA image!");
+}
+
+bool configure_fpga(udp_simple::sptr udp_transport, std::string ip_addr){
+    x300_fpga_update_data_t configure_packet;
+    configure_packet.flags = htonx<boost::uint32_t>(X300_FPGA_PROG_CONFIGURE | X300_FPGA_PROG_FLAGS_ACK);
+    configure_packet.sector = 0;
+    configure_packet.size = 0;
+    configure_packet.index = 0;
+    memset(configure_packet.data, 0, sizeof(configure_packet.data));
+    udp_transport->send(boost::asio::buffer(&configure_packet, sizeof(configure_packet)));
+
+    udp_transport->recv(boost::asio::buffer(x300_data_in_mem), UDP_TIMEOUT);
+    const x300_fpga_update_data_t *configure_data_in = reinterpret_cast<const x300_fpga_update_data_t *>(x300_data_in_mem);
+    bool successful = false;
+
+    if((ntohl(configure_data_in->flags) & X300_FPGA_PROG_FLAGS_ERROR) == X300_FPGA_PROG_FLAGS_ERROR){
+        throw std::runtime_error("Transfer or data verification failed!");
+    }
+    else{
+        std::cout << std::endl << "Waiting for X3x0 to configure FPGA image and reload." << std::endl;
+        boost::this_thread::sleep(boost::posix_time::milliseconds(5000));
+
+        x300_fpga_update_data_t config_status_packet;
+        configure_packet.flags = htonx<boost::uint32_t>(X300_FPGA_PROG_CONFIG_STATUS);
+        config_status_packet.sector = 0;
+        config_status_packet.size = 0;
+        config_status_packet.index = 0;
+        memset(config_status_packet.data, 0, sizeof(config_status_packet.data));
+        for(int i = 0; i < 5; i++){
+            udp_transport->send(boost::asio::buffer(&config_status_packet, sizeof(config_status_packet)));
+            udp_transport->recv(boost::asio::buffer(x300_data_in_mem), 1);
+            const x300_fpga_update_data_t *config_status_data_in = reinterpret_cast<const x300_fpga_update_data_t *>(x300_data_in_mem);
+
+            if((ntohl(config_status_data_in->flags) & X300_FPGA_PROG_FLAGS_ERROR) != X300_FPGA_PROG_FLAGS_ERROR
+               and udp_transport->get_recv_addr() == ip_addr){
+                successful = true;
+                break;
+            }
+            successful = false; //If it worked, the break would skip this
+        }
+    }
+    return successful;
+}
+
+int UHD_SAFE_MAIN(int argc, char *argv[]){
+    memset(intermediary_packet_data, 0, X300_PACKET_SIZE_BYTES);
+    std::string ip_addr, resource, fpga_path, image_type, rpc_port;
+
+    po::options_description desc("Allowed options");
+    desc.add_options()
+        ("help", "Display this help message.")
+        ("addr", po::value<std::string>(&ip_addr), "Specify an IP address.")
+        ("resource", po::value<std::string>(&resource), "Specify an NI-RIO resource.")
+        ("rpc-port", po::value<std::string>(&rpc_port)->default_value("5444"), "Specify a port to communicate with the RPC server.")
+        ("type", po::value<std::string>(&image_type), "Specify an image type (1G, HGS, XGS), leave blank for current type.")
+        ("fpga-path", po::value<std::string>(&fpga_path), "Specify an FPGA path (overrides --type option).")
+        ("configure", "Initialize FPGA with image currently burned to flash (Ethernet only).")
+        ("verify", "Verify data downloaded to flash (Ethernet only, download will take much longer)")
+        ("list", "List all available X3x0 devices.")
+    ;
+    po::variables_map vm;
+    po::store(po::parse_command_line(argc, argv, desc), vm);
+    po::notify(vm);
+
+    //Print help message
+    if(vm.count("help")){
+        std::cout << "USRP X3x0 FPGA Burner" << std::endl << std::endl;
+
+        std::cout << "Burns an FPGA image onto a USRP X300/X310. To burn the image" << std::endl
+                  << "over Ethernet, specify an IP address with the --addr option," << std::endl
+                  << "or to burn over PCIe, specify an NI-RIO resource (ex. RIO0)" << std::endl
+                  << "with the --resource option." << std::endl << std::endl;
+
+        std::cout << desc << std::endl;
+        return EXIT_SUCCESS;
+    }
+
+    //List all available devices
+    if(vm.count("list")){
+        list_usrps();
+        return EXIT_SUCCESS;
+    }
+
+    /*
+     * The user must specify whether to burn the image over Ethernet or PCI-e.
+     */
+    if(not (vm.count("addr") xor vm.count("resource"))){
+        throw std::runtime_error("You must specify addr OR resource!");
+    }
+
+    /*
+     * With settings validated, find X3x0 with specified arguments.
+     */
+    device_addr_t dev = (vm.count("addr")) ? find_usrp_with_ethernet(ip_addr, true)
+                                           : find_usrp_with_pcie(resource, true);
+
+    /*
+     * If custom FPGA path is given, ignore specified type and let FPGA
+     * figure it out.
+     */
+    if(vm.count("fpga-path")){
+        //Expand tilde usage if applicable
+        #ifndef UHD_PLATFORM_WIN32
+            if(fpga_path.find("~/") == 0) fpga_path.replace(0,1,getenv("HOME"));
+        #endif
+    }
+    else{
+        if(vm.count("type")){
+            //Make sure the specified type is 1G, HGS, or XGS
+            if((image_type != "1G") and (image_type != "HGS") and (image_type != "XGS")){
+                throw std::runtime_error("--type must be 1G, HGS, or XGS!");
+            }
+            else fpga_path = get_default_image_path(dev["product"], image_type);
+        }
+        else{
+            //Use default image of currently present FPGA type
+            fpga_path = get_default_image_path(dev["product"], dev["fpga"]);
+        }
+    }
+
+
+    /*
+     * Check validity of image through extension
+     */
+    std::string ext = fs::extension(fpga_path.c_str());
+    if(ext != ".bin" and ext != ".bit" and ext != ".lvbitx"){
+        throw std::runtime_error("The image filename must end in .bin, .bit, or .lvbitx.");
+    }
+
+    if(vm.count("addr")){
+        udp_simple::sptr udp_transport = udp_simple::make_connected(ip_addr, BOOST_STRINGIZE(X300_FPGA_PROG_UDP_PORT));
+
+        ethernet_burn(udp_transport, fpga_path, vm.count("verify"));
+
+        if(vm.count("configure")){
+            if(configure_fpga(udp_transport, ip_addr)) std::cout << "Successfully configured FPGA!" << std::endl;
+            else throw std::runtime_error("FPGA configuring failed!");
+        }
+    }
+    else pcie_burn(resource, rpc_port, fpga_path);
+
+    /*
+     * Attempt to find USRP after burning
+     */
+    std::cout << std::endl << "Attempting to find device..." << std::flush;
+    boost::this_thread::sleep(boost::posix_time::milliseconds(2000)); //Sometimes needed for Ethernet to reconnect
+    device_addr_t found_usrp = (vm.count("addr")) ? find_usrp_with_ethernet(ip_addr, false)
+                                                  : find_usrp_with_pcie(resource, false);
+    std::cout << "found!" << std::endl; //If unsuccessful, runtime error would occur in find functions
+    std::cout << "Successfully burned FPGA image!" << std::endl << std::endl;
+
+    if(vm.count("addr")) std::cout << str(boost::format("Power-cycle the USRP %s to use the new image.") % found_usrp["product"]) << std::endl;
+    else std::cout << str(boost::format("Power-cycle the USRP %s and reboot your machine to use the new image.") % found_usrp["product"]) << std::endl;
+
+    return EXIT_SUCCESS;
+}
diff --git a/tools/chdr-dissector/.gitignore b/tools/chdr-dissector/.gitignore
new file mode 100644
index 000000000..0187b3dac
--- /dev/null
+++ b/tools/chdr-dissector/.gitignore
@@ -0,0 +1,2 @@
+build/
+*~
diff --git a/tools/chdr-dissector/CMakeLists.txt b/tools/chdr-dissector/CMakeLists.txt
new file mode 100644
index 000000000..8d19807d8
--- /dev/null
+++ b/tools/chdr-dissector/CMakeLists.txt
@@ -0,0 +1,96 @@
+# Copyright 2010-2013 Ettus Research LLC
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+
+########################################################################
+# Project setup
+########################################################################
+cmake_minimum_required(VERSION 2.6)
+project(chdr-dissector C)
+set(chdr-dissector_VERSION_MAJOR 0)
+set(chdr-dissector_VERSION_MINOR 0)
+enable_testing()
+
+#select the release build type by default to get optimization flags
+if(NOT CMAKE_BUILD_TYPE)
+   set(CMAKE_BUILD_TYPE "Release")
+   message(STATUS "Build type not specified: defaulting to release.")
+endif(NOT CMAKE_BUILD_TYPE)
+set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "")
+
+list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
+
+########################################################################
+# Compiler specific setup
+########################################################################
+#if(CMAKE_COMPILER_IS_GNUC AND NOT WIN32)
+#    #http://gcc.gnu.org/wiki/Visibility
+#    add_definitions(-fvisibility=visible)
+#endif()
+
+find_package(GLIB2)
+if(NOT GLIB2_FOUND)
+    message(FATAL_ERROR "Glib not found")
+endif()
+
+find_package(Wireshark)
+if(NOT WIRESHARK_FOUND)
+    message(FATAL_ERROR "Wireshark dev package not found")
+endif()
+
+
+########################################################################
+# Setup the include and linker paths
+########################################################################
+include_directories(
+    ${CMAKE_SOURCE_DIR}
+    ${GLIB2_INCLUDE_DIRS}
+    ${WIRESHARK_INCLUDE_DIRS}
+)
+
+#link_directories(
+#    ${Boost_LIBRARY_DIRS}
+#)
+set(CMAKE_INSTALL_LIBDIR ~/.wireshark)
+
+# Set component parameters
+set(CHDR_DISSECTOR_INCLUDE_DIRS ${CMAKE_SOURCE_DIR} CACHE INTERNAL "" FORCE)
+
+set(CHDR_PLUGIN_SRC ${CMAKE_SOURCE_DIR}/packet-chdr.c)
+
+set(PLUGIN_C_GENERATOR ${CMAKE_SOURCE_DIR}/make-dissector-reg.py)
+set(PLUGIN_C plugin.c)
+
+add_custom_command(
+        OUTPUT ${PLUGIN_C}
+        DEPENDS ${CHDR_PLUGIN_SRC}
+        COMMAND ${PLUGIN_C_GENERATOR} ${CMAKE_SOURCE_DIR} plugin ${CHDR_PLUGIN_SRC}
+        COMMENT "Generating ${PLUGIN_C}"
+)
+
+add_library(chdr-plugin MODULE
+    ${PLUGIN_C}
+    moduleinfo.h
+    ${CHDR_PLUGIN_SRC}
+)
+set_target_properties(chdr-plugin PROPERTIES PREFIX "")
+set_target_properties(chdr-plugin PROPERTIES LINK_FLAGS "${WS_LINK_FLAGS}")
+target_link_libraries(chdr-plugin wireshark)
+
+install(TARGETS chdr-plugin
+	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/plugins NAMELINK_SKIP
+)
diff --git a/tools/chdr-dissector/cmake/Modules/FindGLIB2.cmake b/tools/chdr-dissector/cmake/Modules/FindGLIB2.cmake
new file mode 100644
index 000000000..ae7baddbb
--- /dev/null
+++ b/tools/chdr-dissector/cmake/Modules/FindGLIB2.cmake
@@ -0,0 +1,238 @@
+#
+# $Id: FindGLIB2.cmake 34248 2010-09-25 15:38:12Z jmayer $
+#
+# - Try to find GLib2
+# Once done this will define
+#
+#  GLIB2_FOUND - system has GLib2
+#  GLIB2_INCLUDE_DIRS - the GLib2 include directory
+#  GLIB2_LIBRARIES - Link these to use GLib2
+#
+#  HAVE_GLIB_GREGEX_H  glib has gregex.h header and 
+#                      supports g_regex_match_simple
+#
+#  Copyright (c) 2006 Andreas Schneider <mail@cynapses.org>
+#  Copyright (c) 2006 Philippe Bernery <philippe.bernery@gmail.com>
+#  Copyright (c) 2007 Daniel Gollub <gollub@b1-systems.de>
+#  Copyright (c) 2007 Alban Browaeys <prahal@yahoo.com>
+#  Copyright (c) 2008 Michael Bell <michael.bell@web.de>
+#  Copyright (c) 2008-2009 Bjoern Ricks <bjoern.ricks@googlemail.com>
+#
+#  Redistribution and use is allowed according to the terms of the New
+#  BSD license.
+#  For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+#
+
+
+IF (GLIB2_LIBRARIES AND GLIB2_INCLUDE_DIRS )
+  # in cache already
+  SET(GLIB2_FOUND TRUE)
+ELSE (GLIB2_LIBRARIES AND GLIB2_INCLUDE_DIRS )
+
+  INCLUDE(FindPkgConfig)
+
+  ## Glib
+  IF ( GLIB2_FIND_REQUIRED )
+    SET( _pkgconfig_REQUIRED "REQUIRED" )
+  ELSE ( GLIB2_FIND_REQUIRED )
+    SET( _pkgconfig_REQUIRED "" )
+  ENDIF ( GLIB2_FIND_REQUIRED )
+
+  IF ( GLIB2_MIN_VERSION )
+    PKG_SEARCH_MODULE( GLIB2 ${_pkgconfig_REQUIRED} glib-2.0>=${GLIB2_MIN_VERSION} )
+  ELSE ( GLIB2_MIN_VERSION )
+    PKG_SEARCH_MODULE( GLIB2 ${_pkgconfig_REQUIRED} glib-2.0 )
+  ENDIF ( GLIB2_MIN_VERSION )
+  IF ( PKG_CONFIG_FOUND )
+    IF ( GLIB2_FOUND )
+      SET ( GLIB2_CORE_FOUND TRUE )
+    ELSE ( GLIB2_FOUND )
+      SET ( GLIB2_CORE_FOUND FALSE )
+    ENDIF ( GLIB2_FOUND )
+  ENDIF ( PKG_CONFIG_FOUND )
+
+  # Look for glib2 include dir and libraries w/o pkgconfig
+  IF ( NOT GLIB2_FOUND AND NOT PKG_CONFIG_FOUND )
+    FIND_PATH(
+      _glibconfig_include_DIR
+    NAMES
+      glibconfig.h
+    PATHS
+      /opt/gnome/lib64
+      /opt/gnome/lib
+      /opt/lib/
+      /opt/local/lib
+      /sw/lib/
+      /usr/lib64
+      /usr/lib
+      /usr/local/include
+      ${CMAKE_LIBRARY_PATH}
+    PATH_SUFFIXES
+      glib-2.0/include
+    )
+
+    FIND_PATH(
+      _glib2_include_DIR
+    NAMES
+      glib.h
+    PATHS
+      /opt/gnome/include
+      /opt/local/include
+      /sw/include
+      /usr/include
+      /usr/local/include
+    PATH_SUFFIXES
+      glib-2.0
+    )
+
+    #MESSAGE(STATUS "Glib headers: ${_glib2_include_DIR}")
+
+    FIND_LIBRARY(
+      _glib2_link_DIR
+    NAMES
+      glib-2.0
+      glib
+    PATHS
+      /opt/gnome/lib
+      /opt/local/lib
+      /sw/lib
+      /usr/lib
+      /usr/local/lib
+    )
+    IF ( _glib2_include_DIR AND _glib2_link_DIR )
+        SET ( _glib2_FOUND TRUE )
+    ENDIF ( _glib2_include_DIR AND _glib2_link_DIR )
+
+
+    IF ( _glib2_FOUND )
+        SET ( GLIB2_INCLUDE_DIRS ${_glib2_include_DIR} ${_glibconfig_include_DIR} )
+        SET ( GLIB2_LIBRARIES ${_glib2_link_DIR} )
+        SET ( GLIB2_CORE_FOUND TRUE )
+    ELSE ( _glib2_FOUND )
+        SET ( GLIB2_CORE_FOUND FALSE )
+    ENDIF ( _glib2_FOUND )
+
+    # Handle dependencies
+    # libintl
+    IF ( NOT LIBINTL_FOUND )
+      FIND_PATH(LIBINTL_INCLUDE_DIR
+      NAMES
+        libintl.h
+      PATHS
+        /opt/gnome/include
+        /opt/local/include
+        /sw/include
+        /usr/include
+        /usr/local/include
+      )
+
+      FIND_LIBRARY(LIBINTL_LIBRARY
+      NAMES
+        intl
+      PATHS
+        /opt/gnome/lib
+        /opt/local/lib
+        /sw/lib
+        /usr/local/lib
+        /usr/lib
+      )
+
+      IF (LIBINTL_LIBRARY AND LIBINTL_INCLUDE_DIR)
+        SET (LIBINTL_FOUND TRUE)
+      ENDIF (LIBINTL_LIBRARY AND LIBINTL_INCLUDE_DIR)
+    ENDIF ( NOT LIBINTL_FOUND )
+
+    # libiconv
+    IF ( NOT LIBICONV_FOUND )
+      FIND_PATH(LIBICONV_INCLUDE_DIR
+      NAMES
+        iconv.h
+      PATHS
+        /opt/gnome/include
+        /opt/local/include
+        /opt/local/include
+        /sw/include
+        /sw/include
+        /usr/local/include
+        /usr/include
+      PATH_SUFFIXES
+        glib-2.0
+      )
+
+      FIND_LIBRARY(LIBICONV_LIBRARY
+      NAMES
+        iconv
+      PATHS
+        /opt/gnome/lib
+        /opt/local/lib
+        /sw/lib
+        /usr/lib
+        /usr/local/lib
+      )
+
+      IF (LIBICONV_LIBRARY AND LIBICONV_INCLUDE_DIR)
+        SET (LIBICONV_FOUND TRUE)
+      ENDIF (LIBICONV_LIBRARY AND LIBICONV_INCLUDE_DIR)
+    ENDIF ( NOT LIBICONV_FOUND )
+
+    IF (LIBINTL_FOUND)
+      SET (GLIB2_LIBRARIES ${GLIB2_LIBRARIES} ${LIBINTL_LIBRARY})
+      SET (GLIB2_INCLUDE_DIRS ${GLIB2_INCLUDE_DIRS} ${LIBINTL_INCLUDE_DIR})
+    ENDIF (LIBINTL_FOUND)
+
+    IF (LIBICONV_FOUND)
+      SET (GLIB2_LIBRARIES ${GLIB2_LIBRARIES} ${LIBICONV_LIBRARY})
+      SET (GLIB2_INCLUDE_DIRS ${GLIB2_INCLUDE_DIRS} ${LIBICONV_INCLUDE_DIR})
+    ENDIF (LIBICONV_FOUND)
+
+  ENDIF ( NOT GLIB2_FOUND AND NOT PKG_CONFIG_FOUND )
+  ##
+
+  IF (GLIB2_CORE_FOUND AND GLIB2_INCLUDE_DIRS AND GLIB2_LIBRARIES)
+    SET (GLIB2_FOUND TRUE)
+  ENDIF (GLIB2_CORE_FOUND AND GLIB2_INCLUDE_DIRS AND GLIB2_LIBRARIES)
+
+  IF (GLIB2_FOUND)
+    IF (NOT GLIB2_FIND_QUIETLY)
+      MESSAGE (STATUS "Found GLib2: ${GLIB2_LIBRARIES} ${GLIB2_INCLUDE_DIRS}")
+    ENDIF (NOT GLIB2_FIND_QUIETLY)
+  ELSE (GLIB2_FOUND)
+    IF (GLIB2_FIND_REQUIRED)
+      MESSAGE (SEND_ERROR "Could not find GLib2")
+    ENDIF (GLIB2_FIND_REQUIRED)
+  ENDIF (GLIB2_FOUND)
+
+  # show the GLIB2_INCLUDE_DIRS and GLIB2_LIBRARIES variables only in the advanced view
+  MARK_AS_ADVANCED(GLIB2_INCLUDE_DIRS GLIB2_LIBRARIES)
+  MARK_AS_ADVANCED(LIBICONV_INCLUDE_DIR LIBICONV_LIBRARY)
+  MARK_AS_ADVANCED(LIBINTL_INCLUDE_DIR LIBINTL_LIBRARY)
+
+ENDIF (GLIB2_LIBRARIES AND GLIB2_INCLUDE_DIRS)
+
+IF ( WIN32 )
+    # include libiconv for win32
+    IF ( NOT LIBICONV_FOUND )
+      FIND_PATH(LIBICONV_INCLUDE_DIR iconv.h PATH_SUFFIXES glib-2.0)
+
+      FIND_LIBRARY(LIBICONV_LIBRARY NAMES iconv)
+
+      IF (LIBICONV_LIBRARY AND LIBICONV_INCLUDE_DIR)
+        SET (LIBICONV_FOUND TRUE)
+      ENDIF (LIBICONV_LIBRARY AND LIBICONV_INCLUDE_DIR)
+    ENDIF ( NOT LIBICONV_FOUND )
+    IF (LIBICONV_FOUND)
+      SET (GLIB2_LIBRARIES ${GLIB2_LIBRARIES} ${LIBICONV_LIBRARY})
+      SET (GLIB2_INCLUDE_DIRS ${GLIB2_INCLUDE_DIRS} ${LIBICONV_INCLUDE_DIR})
+    ENDIF (LIBICONV_FOUND)
+ENDIF ( WIN32 )
+
+IF ( GLIB2_FOUND )
+	# Check if system has a newer version of glib
+	# which supports g_regex_match_simple
+	INCLUDE( CheckIncludeFiles )
+	SET( CMAKE_REQUIRED_INCLUDES ${GLIB2_INCLUDE_DIRS} )
+	CHECK_INCLUDE_FILES ( glib/gregex.h HAVE_GLIB_GREGEX_H )
+	CHECK_INCLUDE_FILES ( glib/gchecksum.h HAVE_GLIB_GCHECKSUM_H )
+	# Reset CMAKE_REQUIRED_INCLUDES
+	SET( CMAKE_REQUIRED_INCLUDES "" )
+ENDIF( GLIB2_FOUND )
diff --git a/tools/chdr-dissector/cmake/Modules/FindWireshark.cmake b/tools/chdr-dissector/cmake/Modules/FindWireshark.cmake
new file mode 100644
index 000000000..59497da16
--- /dev/null
+++ b/tools/chdr-dissector/cmake/Modules/FindWireshark.cmake
@@ -0,0 +1,28 @@
+#
+# Try to find the wireshark library and its includes
+#
+# This snippet sets the following variables:
+#  WIRESHARK_FOUND             True if wireshark library got found
+#  WIRESHARK_INCLUDE_DIRS      Location of the wireshark headers 
+#  WIRESHARK_LIBRARIES         List of libraries to use wireshark
+#
+#  Copyright (c) 2011 Reinhold Kainhofer <reinhold@kainhofer.com>
+#
+#  Redistribution and use is allowed according to the terms of the New
+#  BSD license.
+#  For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+#
+
+# wireshark does not install its library with pkg-config information,
+# so we need to manually find the libraries and headers
+
+FIND_PATH( WIRESHARK_INCLUDE_DIRS epan/column_info.h PATH_SUFFIXES wireshark )
+FIND_LIBRARY( WIRESHARK_LIBRARIES wireshark )
+
+# Report results
+IF ( WIRESHARK_LIBRARIES AND WIRESHARK_INCLUDE_DIRS )
+  SET( WIRESHARK_FOUND 1 )
+ELSE ( WIRESHARK_LIBRARIES AND WIRESHARK_INCLUDE_DIRS )
+  MESSAGE( SEND_ERROR "Could NOT find the wireshark library and headers" )
+ENDIF ( WIRESHARK_LIBRARIES AND WIRESHARK_INCLUDE_DIRS )
+
diff --git a/tools/chdr-dissector/make-dissector-reg.py b/tools/chdr-dissector/make-dissector-reg.py
new file mode 100755
index 000000000..44972909b
--- /dev/null
+++ b/tools/chdr-dissector/make-dissector-reg.py
@@ -0,0 +1,305 @@
+#!/usr/bin/env python
+#
+# Looks for registration routines in the protocol dissectors,
+# and assembles C code to call all the routines.
+#
+# This is a Python version of the make-reg-dotc shell script.
+# Running the shell script on Win32 is very very slow because of
+# all the process-launching that goes on --- multiple greps and
+# seds for each input file.  I wrote this python version so that
+# less processes would have to be started.
+#
+# $Id: make-dissector-reg.py 30447 2009-10-09 20:47:18Z krj $
+
+import os
+import sys
+import re
+import pickle
+from stat import *
+
+VERSION_KEY = '_VERSION'
+CUR_VERSION = '$Id: make-dissector-reg.py 30447 2009-10-09 20:47:18Z krj $'
+
+#
+# The first argument is the directory in which the source files live.
+#
+srcdir = sys.argv[1]
+
+#
+# The second argument is either "plugin" or "dissectors"; if it's
+# "plugin", we build a plugin.c for a plugin, and if it's
+# "dissectors", we build a register.c for libwireshark.
+#
+registertype = sys.argv[2]
+if registertype == "plugin" or registertype == "plugin_wtap":
+	tmp_filename = "plugin.c-tmp"
+	final_filename = "plugin.c"
+	cache_filename = None
+	preamble = """\
+/*
+ * Do not modify this file.
+ *
+ * It is created automatically by Makefile or Makefile.nmake.
+ */
+"""
+elif registertype == "dissectors":
+	tmp_filename = "register.c-tmp"
+	final_filename = "register.c"
+	cache_filename = "register-cache.pkl"
+	preamble = """\
+/*
+ * Do not modify this file.
+ *
+ * It is created automatically by the "register.c" target in
+ * epan/dissectors/Makefile or Makefile.nmake using information in
+ * epan/dissectors/register-cache.pkl.
+ *
+ * You can force this file to be regenerated completely by deleting
+ * it along with epan/dissectors/register-cache.pkl.
+ */
+"""
+else:
+	print "Unknown output type '%s'" % registertype
+	sys.exit(1)
+
+
+#
+# All subsequent arguments are the files to scan.
+#
+files = sys.argv[3:]
+
+# Create the proper list of filenames
+filenames = []
+for file in files:
+	if os.path.isfile(file):
+		filenames.append(file)
+	else:
+		filenames.append(os.path.join(srcdir, file))
+
+if len(filenames) < 1:
+	print "No files found"
+	sys.exit(1)
+
+
+# Look through all files, applying the regex to each line.
+# If the pattern matches, save the "symbol" section to the
+# appropriate array.
+regs = {
+	'proto_reg': [],
+	'handoff_reg': [],
+	'wtap_register': [],
+	}
+
+# For those that don't know Python, r"" indicates a raw string,
+# devoid of Python escapes.
+proto_regex0 = r"^(?P<symbol>proto_register_[_A-Za-z0-9]+)\s*\([^;]+$"
+proto_regex1 = r"void\s+(?P<symbol>proto_register_[_A-Za-z0-9]+)\s*\([^;]+$"
+
+handoff_regex0 = r"^(?P<symbol>proto_reg_handoff_[_A-Za-z0-9]+)\s*\([^;]+$"
+handoff_regex1 = r"void\s+(?P<symbol>proto_reg_handoff_[_A-Za-z0-9]+)\s*\([^;]+$"
+
+wtap_reg_regex0 = r"^(?P<symbol>wtap_register_[_A-Za-z0-9]+)\s*\([^;]+$"
+wtap_reg_regex1 = r"void\s+(?P<symbol>wtap_register_[_A-Za-z0-9]+)\s*\([^;]+$"
+
+# This table drives the pattern-matching and symbol-harvesting
+patterns = [
+	( 'proto_reg', re.compile(proto_regex0) ),
+	( 'proto_reg', re.compile(proto_regex1) ),
+	( 'handoff_reg', re.compile(handoff_regex0) ),
+	( 'handoff_reg', re.compile(handoff_regex1) ),
+	( 'wtap_register', re.compile(wtap_reg_regex0) ),
+	( 'wtap_register', re.compile(wtap_reg_regex1) ),
+	]
+
+# Open our registration symbol cache
+cache = None
+if cache_filename:
+	try:
+		cache_file = open(cache_filename, 'rb')
+		cache = pickle.load(cache_file)
+		cache_file.close()
+		if not cache.has_key(VERSION_KEY) or cache[VERSION_KEY] != CUR_VERSION:
+			cache = {VERSION_KEY: CUR_VERSION}
+	except:
+		cache = {VERSION_KEY: CUR_VERSION}
+
+# Grep
+for filename in filenames:
+	file = open(filename)
+	cur_mtime = os.fstat(file.fileno())[ST_MTIME]
+	if cache and cache.has_key(filename):
+		cdict = cache[filename]
+		if cur_mtime == cdict['mtime']:
+#			print "Pulling %s from cache" % (filename)
+			regs['proto_reg'].extend(cdict['proto_reg'])
+			regs['handoff_reg'].extend(cdict['handoff_reg'])
+			regs['wtap_register'].extend(cdict['wtap_register'])
+			file.close()
+			continue
+	# We don't have a cache entry
+	if cache is not None:
+		cache[filename] = {
+			'mtime': cur_mtime,
+			'proto_reg': [],
+			'handoff_reg': [],
+			'wtap_register': [],
+			}
+#	print "Searching %s" % (filename)
+	for line in file.readlines():
+		for action in patterns:
+			regex = action[1]
+			match = regex.search(line)
+			if match:
+				symbol = match.group("symbol")
+				sym_type = action[0]
+				regs[sym_type].append(symbol)
+				if cache is not None:
+#					print "Caching %s for %s: %s" % (sym_type, filename, symbol)
+					cache[filename][sym_type].append(symbol)
+	file.close()
+
+if cache is not None and cache_filename is not None:
+	cache_file = open(cache_filename, 'wb')
+	pickle.dump(cache, cache_file)
+	cache_file.close()
+
+# Make sure we actually processed something
+if len(regs['proto_reg']) < 1:
+	print "No protocol registrations found"
+	sys.exit(1)
+
+# Sort the lists to make them pretty
+regs['proto_reg'].sort()
+regs['handoff_reg'].sort()
+regs['wtap_register'].sort()
+
+reg_code = open(tmp_filename, "w")
+
+reg_code.write(preamble)
+
+# Make the routine to register all protocols
+if registertype == "plugin" or registertype == "plugin_wtap":
+	reg_code.write("""
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <gmodule.h>
+
+#include "moduleinfo.h"
+
+#ifndef ENABLE_STATIC
+G_MODULE_EXPORT const gchar version[] = VERSION;
+
+/* Start the functions we need for the plugin stuff */
+
+G_MODULE_EXPORT void
+plugin_register (void)
+{
+""");
+else:
+	reg_code.write("""
+#include "register.h"
+void
+register_all_protocols(register_cb cb, gpointer client_data)
+{
+""");
+
+for symbol in regs['proto_reg']:
+	if registertype == "plugin" or registertype == "plugin_wtap":
+		line = "  {extern void %s (void); %s ();}\n" % (symbol, symbol)
+	else:
+		line = "  {extern void %s (void); if(cb) (*cb)(RA_REGISTER, \"%s\", client_data); %s ();}\n" % (symbol, symbol, symbol)
+	reg_code.write(line)
+
+reg_code.write("}\n")
+
+
+# Make the routine to register all protocol handoffs
+if registertype == "plugin" or registertype == "plugin_wtap":
+	reg_code.write("""
+G_MODULE_EXPORT void
+plugin_reg_handoff(void)
+{
+""");
+else:
+	reg_code.write("""
+void
+register_all_protocol_handoffs(register_cb cb, gpointer client_data)
+{
+""");
+
+for symbol in regs['handoff_reg']:
+	if registertype == "plugin" or registertype == "plugin_wtap":
+		line = "  {extern void %s (void); %s ();}\n" % (symbol, symbol)
+	else:
+		line = "  {extern void %s (void); if(cb) (*cb)(RA_HANDOFF, \"%s\", client_data); %s ();}\n" % (symbol, symbol, symbol)
+	reg_code.write(line)
+
+reg_code.write("}\n")
+
+if registertype == "plugin":
+	reg_code.write("#endif\n");
+elif registertype == "plugin_wtap":
+	reg_code.write("""
+G_MODULE_EXPORT void
+register_wtap_module(void)
+{
+""");
+
+	for symbol in regs['wtap_register']:
+		line = "  {extern void %s (void); %s ();}\n" % (symbol, symbol)
+		reg_code.write(line)
+
+	reg_code.write("}\n");
+        reg_code.write("#endif\n");
+else:
+	reg_code.write("""
+static gulong proto_reg_count(void)
+{
+""");
+
+	line = "  return %d;\n" % len(regs['proto_reg'])
+	reg_code.write(line)
+
+	reg_code.write("""
+}
+""");
+	reg_code.write("""
+static gulong handoff_reg_count(void)
+{
+""");
+
+	line = "  return %d;\n" % len(regs['handoff_reg'])
+	reg_code.write(line)
+
+	reg_code.write("""
+}
+""");
+	reg_code.write("""
+gulong register_count(void)
+{
+""");
+
+	line = "  return proto_reg_count() + handoff_reg_count();"
+	reg_code.write(line)
+
+	reg_code.write("""
+}\n
+""");
+
+
+# Close the file
+reg_code.close()
+
+# Remove the old final_file if it exists.
+try:
+	os.stat(final_filename)
+	os.remove(final_filename)
+except OSError:
+	pass
+
+# Move from tmp file to final file
+os.rename(tmp_filename, final_filename)
+
+
diff --git a/tools/chdr-dissector/moduleinfo.h b/tools/chdr-dissector/moduleinfo.h
new file mode 100644
index 000000000..d8f0570c7
--- /dev/null
+++ b/tools/chdr-dissector/moduleinfo.h
@@ -0,0 +1,9 @@
+#ifdef PACKAGE
+#undef PACKAGE
+#endif
+#define PACKAGE "chdr"
+#ifdef VERSION
+#undef VERSION
+#endif
+#define VERSION "0.0.0.1"
+
diff --git a/tools/chdr-dissector/packet-chdr.c b/tools/chdr-dissector/packet-chdr.c
new file mode 100644
index 000000000..0c2748c6c
--- /dev/null
+++ b/tools/chdr-dissector/packet-chdr.c
@@ -0,0 +1,327 @@
+/* packet-chdr.c
+ * Dissector for UHD CHDR packets
+ *
+ *
+ * Copyright 2010-2013 Ettus Research LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#define CHDR_PORT 49153
+
+#include "config.h"
+
+#include <glib.h>
+#include <epan/packet.h>
+#include <ctype.h>
+#include <stdio.h>
+
+void proto_register_chdr(void);
+void proto_reg_handoff_chdr(void);
+
+static int proto_chdr = -1;
+static int hf_chdr = -1;
+static int hf_chdr_hdr = -1;
+static int hf_chdr_is_extension = -1;
+static int hf_chdr_reserved = -1;
+static int hf_chdr_has_time = -1;
+static int hf_chdr_eob = -1;
+static int hf_chdr_sequence = -1;
+static int hf_chdr_packet_size = -1;
+static int hf_chdr_stream_id = -1;
+static int hf_chdr_src_dev = -1;
+static int hf_chdr_src_ep = -1;
+static int hf_chdr_dst_dev = -1;
+static int hf_chdr_dst_ep = -1;
+static int hf_chdr_timestamp = -1;
+static int hf_chdr_payload = -1;
+
+/* the heuristic dissector is called on every packet with payload.
+ * The warning printed for this should only be printed once.
+ */
+static int heur_warning_printed = 0;
+
+/* Forward-declare the dissector functions */
+static void dissect_chdr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+
+/* Subtree handles: set by register_subtree_array */
+static gint ett_chdr = -1;
+static gint ett_chdr_id = -1;
+
+
+/* heuristic dissector call. Will always return. */
+static gboolean heur_dissect_chdr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	if(heur_warning_printed < 1){
+		printf("heuristic dissector for UHD CHDR always returns true!\n");
+		heur_warning_printed++;
+	}
+	dissect_chdr(tvb, pinfo, tree); 
+    return (TRUE);
+}
+
+static void byte_swap(guint8 *bytes, gint len)
+{
+	guint8 tmp[4];
+	
+	if(len != 4){
+		printf("FATAL! number of bytes don't match 32 bit!\n");
+		return;
+	}
+	
+	memcpy(tmp, bytes, 4);
+	bytes[0] = tmp[3];
+	bytes[1] = tmp[2];
+	bytes[2] = tmp[1];
+	bytes[3] = tmp[0];
+}
+
+static guint64 get_timestamp(guint8 *bytes, gint len)
+{
+	guint64 ts;
+	guint64 trans;
+	int it;
+	
+	if(len != 8){
+		printf("FATAL! timestamps always consist of 64 bits!\n");
+	}
+	
+	byte_swap(bytes, 4);
+	byte_swap(bytes+4, 4);
+
+	ts = 0;
+	for(it = 0 ; it < 8 ; it++){
+		ts = ts << 8;
+		trans = (guint64) bytes[it];
+		ts = ts | trans;
+	}
+
+	return (ts);
+}
+
+/* The dissector itself */
+static void dissect_chdr(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+	// Here are all the variables	
+	proto_item *item;
+	proto_item *stream_item;
+    proto_tree *chdr_tree;
+    proto_tree *stream_tree;
+    gint len;
+    
+    gint flag_offset;
+	guint8 *bytes;
+	gboolean flag_has_time;
+	guint64 timestamp;
+	gboolean is_network;
+	gint endianness;
+	gint id_pos_usb[4] = {7, 6, 5, 4};
+	gint id_pos_net[4] = {4, 5, 6, 7};
+	gint id_pos[4] = {7, 6, 5, 4};
+	
+	if(pinfo->match_uint == CHDR_PORT){
+		is_network = TRUE;
+		flag_offset = 0;
+		endianness = ENC_BIG_ENDIAN;
+		memcpy(id_pos, id_pos_net, 4 * sizeof(gint));
+	}
+	else{
+		is_network = FALSE;
+		flag_offset = 3;
+		endianness = ENC_LITTLE_ENDIAN;
+		memcpy(id_pos, id_pos_usb, 4 * sizeof(gint));
+	}
+
+	len = tvb_reported_length(tvb);
+
+    col_append_str(pinfo->cinfo, COL_PROTOCOL, "/CHDR");
+    col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "CHDR",
+        tvb_format_text_wsp(tvb, 0, len));
+
+    if (tree) {
+        /* Start with a top-level item to add everything else to */
+        item = proto_tree_add_item(tree, proto_chdr, tvb, 0, 16, ENC_NA);
+        chdr_tree = proto_item_add_subtree(item, ett_chdr);
+
+		bytes = tvb_get_string(tvb, 0, 4);
+		flag_has_time = bytes[flag_offset] & 0x20;
+
+		/* These lines add flag info to tree */
+		proto_tree_add_item(chdr_tree, hf_chdr_is_extension, tvb, flag_offset, 1, ENC_NA);
+		proto_tree_add_item(chdr_tree, hf_chdr_reserved, tvb, flag_offset, 1, ENC_NA);
+		proto_tree_add_item(chdr_tree, hf_chdr_has_time, tvb, flag_offset, 1, ENC_NA);
+		proto_tree_add_item(chdr_tree, hf_chdr_eob, tvb, flag_offset, 1, ENC_NA);
+
+		/* These lines add sequence, packet_size and stream ID */
+		proto_tree_add_item(chdr_tree, hf_chdr_sequence, tvb, is_network ? 0:2, 2, endianness);
+		proto_tree_add_item(chdr_tree, hf_chdr_packet_size, tvb, is_network ? 2:0, 2, endianness);
+		
+		/* stream id can be broken down to 4 sections. these are collapsed in a subtree */
+		stream_item = proto_tree_add_item(chdr_tree, hf_chdr_stream_id, tvb, 4, 4, endianness);
+		stream_tree = proto_item_add_subtree(stream_item, ett_chdr_id);
+		proto_tree_add_item(stream_tree, hf_chdr_src_dev, tvb, id_pos[0], 1, ENC_NA);
+		proto_tree_add_item(stream_tree, hf_chdr_src_ep, tvb, id_pos[1], 1, ENC_NA);
+		proto_tree_add_item(stream_tree, hf_chdr_dst_dev, tvb, id_pos[2], 1, ENC_NA);
+		proto_tree_add_item(stream_tree, hf_chdr_dst_ep, tvb, id_pos[3], 1, ENC_NA);
+		
+		/* if has_time flag is present interpret timestamp */
+		if(flag_has_time){
+			item = proto_tree_add_item(chdr_tree, hf_chdr_timestamp, tvb, 8, 8, endianness);
+			
+			if(!is_network){
+				bytes = (guint8*) tvb_get_string(tvb, 8, 8);
+				timestamp = get_timestamp(bytes, 8);
+			}
+		}
+    }
+}
+
+void
+proto_register_chdr(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_chdr,
+            { "CHDR", "chdr.hdr", FT_STRING, BASE_NONE,
+              NULL, 0x0, NULL, HFILL }
+		},
+		{ &hf_chdr_is_extension,
+            { "CHDR is extension", "chdr.is_extension",
+            FT_BOOLEAN, BASE_NONE,
+            NULL, 0x80,
+            NULL, HFILL }
+        },
+		{ &hf_chdr_reserved,
+            { "CHDR reserved", "chdr.reserved",
+            FT_BOOLEAN, BASE_NONE,
+            NULL, 0x40,
+            NULL, HFILL }
+        },
+		{ &hf_chdr_has_time,
+            { "CHDR has time", "chdr.has_time",
+            FT_BOOLEAN, BASE_NONE,
+            NULL, 0x20,
+            NULL, HFILL }
+        },
+		{ &hf_chdr_eob,
+            { "CHDR end of burst", "chdr.eob",
+            FT_BOOLEAN, BASE_NONE,
+            NULL, 0x10,
+            NULL, HFILL }
+        },
+		{ &hf_chdr_sequence,
+            { "CHDR sequence", "chdr.sequence",
+            FT_UINT16, BASE_DEC,
+            NULL, 0x0FFF,
+            NULL, HFILL }
+        },
+		{ &hf_chdr_packet_size,
+            { "CHDR packet size", "chdr.packet_size",
+            FT_UINT16, BASE_DEC,
+            NULL, 0x0,
+            NULL, HFILL }
+        },
+		{ &hf_chdr_stream_id,
+            { "CHDR stream id", //name
+				"chdr.stream_id", //abbr
+            	FT_IPv4, //type
+				BASE_NONE, //display
+            	NULL, //strings
+				0x0, //bitmask
+            	NULL, //brief description
+				HFILL // id
+			}
+        },
+        { &hf_chdr_src_dev,
+            { "CHDR source device", //name
+				"chdr.src_dev", //abbr
+            	FT_UINT8, //type
+				BASE_DEC, //display
+            	NULL, //strings
+				0x0, //bitmask
+            	NULL, //brief description
+				HFILL // id
+			}
+        },
+        { &hf_chdr_src_ep,
+            { "CHDR source endpoint", //name
+				"chdr.src_ep", //abbr
+            	FT_UINT8, //type
+				BASE_DEC, //display
+            	NULL, //strings
+				0x0, //bitmask
+            	NULL, //brief description
+				HFILL // id
+			}
+        },
+        { &hf_chdr_dst_dev,
+            { "CHDR destination device", //name
+				"chdr.dst_dev", //abbr
+            	FT_UINT8, //type
+				BASE_DEC, //display
+            	NULL, //strings
+				0x0, //bitmask
+            	NULL, //brief description
+				HFILL // id
+			}
+        },
+        { &hf_chdr_dst_ep,
+            { "CHDR destination endpoint", //name
+				"chdr.dst_ep", //abbr
+            	FT_UINT8, //type
+				BASE_DEC, //display
+            	NULL, //strings
+				0x0, //bitmask
+            	NULL, //brief description
+				HFILL // id
+			}
+        },
+
+		{ &hf_chdr_timestamp,
+            { "CHDR timestamp", //name
+				"chdr.timestamp", //abbr
+            	FT_UINT64, //type
+				BASE_DEC, //display
+            	NULL, //strings
+				0x0, //bitmask
+            	NULL, //brief description
+				HFILL
+			}
+        },
+    };
+
+    static gint *ett[] = {
+        &ett_chdr,
+        &ett_chdr_id
+    };
+
+    proto_chdr = proto_register_protocol("UHD CHDR", "CHDR", "chdr");
+    proto_register_field_array(proto_chdr, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+    register_dissector("chdr", dissect_chdr, proto_chdr);
+}
+
+/* Handler registration */
+void
+proto_reg_handoff_chdr(void)
+{
+    /* register heuristic dissector for use with USB */
+    heur_dissector_add("usb.bulk", heur_dissect_chdr, proto_chdr);
+
+	/* register dissector for UDP packets */
+    static dissector_handle_t chdr_handle;
+    chdr_handle = create_dissector_handle(dissect_chdr, proto_chdr);
+    dissector_add_uint("udp.port", CHDR_PORT, chdr_handle);
+}
+
diff --git a/tools/chdr-dissector/plugin.rc.in b/tools/chdr-dissector/plugin.rc.in
new file mode 100644
index 000000000..f9d714704
--- /dev/null
+++ b/tools/chdr-dissector/plugin.rc.in
@@ -0,0 +1,34 @@
+#include "winver.h"
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION @RC_MODULE_VERSION@
+ PRODUCTVERSION @RC_VERSION@
+ FILEFLAGSMASK 0x0L
+#ifdef _DEBUG
+ FILEFLAGS VS_FF_DEBUG
+#else
+ FILEFLAGS 0
+#endif
+ FILEOS VOS_NT_WINDOWS32
+ FILETYPE VFT_DLL
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "CompanyName", "Ettus Research LLC\0"
+            VALUE "FileDescription", "@PACKAGE@ dissector\0"
+            VALUE "FileVersion", "@MODULE_VERSION@\0"
+            VALUE "InternalName", "@PACKAGE@ @MODULE_VERSION@\0"
+            VALUE "LegalCopyright", "Copyright © 2013 Ettus Research LLC\0"
+            VALUE "OriginalFilename", "@PLUGIN_NAME@.dll\0"
+            VALUE "ProductName", "Wireshark\0"
+            VALUE "ProductVersion", "@VERSION@\0"
+            VALUE "Comments", "Build with @MSVC_VARIANT@\0"
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
diff --git a/tools/uhd_dump/Makefile b/tools/uhd_dump/Makefile
new file mode 100644
index 000000000..93181570b
--- /dev/null
+++ b/tools/uhd_dump/Makefile
@@ -0,0 +1,23 @@
+INCLUDES = usrp3_regs.h uhd_dump.h
+
+BINARIES = chdr_log
+
+OBJECTS = uhd_dump.o 
+
+CFLAGS = -g -O0 -Wall
+
+LDFLAGS = -lpcap -lm 
+
+CC = cc
+
+.PHONY: all
+all: $(BINARIES)
+
+chdr_log: uhd_dump.o chdr_log.o $(INCLUDES)
+	$(CC) $(CFLAGS) -o $@ uhd_dump.o chdr_log.o  $(LDFLAGS)
+
+
+
+clean:
+	rm $(BINARIES)  $(BINARIES:%=%.o) $(OBJECTS)
+
diff --git a/tools/uhd_dump/chdr_log.c b/tools/uhd_dump/chdr_log.c
new file mode 100644
index 000000000..9a0834e9b
--- /dev/null
+++ b/tools/uhd_dump/chdr_log.c
@@ -0,0 +1,212 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <pcap.h>
+#include <netinet/in.h>
+#include <time.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "uhd_dump.h"
+
+//#define DEBUG 1
+
+void usage()
+{
+  fprintf(stderr,"Usage: chdr_dump [-h host_ip] filename.pcap\n");
+  exit(2);
+}
+
+int main(int argc, char *argv[])
+{
+  struct pbuf_info *packet_buffer;      // Store all packets of interest here
+  struct in_addr host_addr;             // Apparent Host IP addr in this capture
+  struct in_addr usrp_addr;             // Apparent USRP IP addr in this capture
+  struct timeval *origin_ts;            // Timestamp of first packet in file.
+  long long origin_ts_in_us;
+  int direction;                        // Flag to show direction of packet flow. 0=H->U, 1=U->H.
+  int packet_count[2];                  // Number of packets that match filter
+  double size_average[2];               // Average size of packets Host to USRP
+  int size_histogram[90][2];            // Array captures histogram of packet sizes Host to USRP in 100 byte bins
+  int x;                                // Local integer scratch variables
+  char *conversion_error[1];
+  int c;
+  char buffer[26];                      // Buffer to format GMT time stamp strings for output
+  double time_since_start;              // Time elapsed in seconds since start
+
+  const struct ip_header *ip_header;
+ 
+  u32 *dump_header;
+
+
+  host_addr.s_addr = 0x0;
+  //usrp_addr.s_addr = 0x0;
+
+  while ((c = getopt(argc, argv, "h:u:")) != -1) {
+    switch(c) {
+    case 'h':
+      // Explicit IP address for host on command line
+      if (*optarg == '\0')
+	usage();
+      host_addr.s_addr = strtol(strtok(optarg,"."),conversion_error,10) ;
+      if  (**conversion_error != '\0')
+      	usage();
+      host_addr.s_addr = host_addr.s_addr | strtol(strtok(NULL,"."),conversion_error,10) << 8;
+      if  (**conversion_error != '\0')
+       	usage();
+      host_addr.s_addr = host_addr.s_addr | strtol(strtok(NULL,"."),conversion_error,10) << 16;
+      if  (**conversion_error != '\0')
+       	usage();
+      host_addr.s_addr = host_addr.s_addr | strtol(strtok(NULL,"\0"),conversion_error,10) << 24;
+      if  (**conversion_error != '\0')
+	usage();
+      break;
+    case 'u':
+      // Explicit IP address for USRP on command line
+      if (*optarg == '\0')
+	usage();
+      usrp_addr.s_addr = strtol(strtok(optarg,"."),conversion_error,10) ;
+      if  (**conversion_error != '\0')
+      	usage();
+      usrp_addr.s_addr = usrp_addr.s_addr | strtol(strtok(NULL,"."),conversion_error,10) << 8;
+      if  (**conversion_error != '\0')
+       	usage();
+      usrp_addr.s_addr = usrp_addr.s_addr | strtol(strtok(NULL,"."),conversion_error,10) << 16;
+      if  (**conversion_error != '\0')
+       	usage();
+      usrp_addr.s_addr = usrp_addr.s_addr | strtol(strtok(NULL,"\0"),conversion_error,10) << 24;
+      if  (**conversion_error != '\0')
+	usage();
+      break;
+
+    case'?':
+    default:
+      usage();
+    }
+  }
+
+  argc -= (optind - 1);
+  argv += (optind -1);
+
+
+  // Just a mandatory pcap filename for now, better parser and options later.
+  if (argc != 2) {
+    usage();
+  }
+
+
+  // Init packet buffer
+  packet_buffer = malloc(sizeof(struct pbuf_info));
+
+  // Init origin timestamp
+  origin_ts = malloc(sizeof(struct timeval));
+
+  // Go read matching packets from capture file into memory
+  get_udp_port_from_file(CHDR_PORT,argv[1],packet_buffer,origin_ts);
+
+  // Extract origin tome of first packet and convert to uS.
+  origin_ts_in_us = origin_ts->tv_sec * 1000000 + origin_ts->tv_usec;
+
+
+  // Count number of packets in capture
+  packet_buffer->current = packet_buffer->start;
+  x = 0;
+
+  while (packet_buffer->current != NULL) {
+    x++;
+    packet_buffer->current = packet_buffer->current->next;
+  }
+
+  fprintf(stdout,"\n===================================================================\n");
+  fprintf(stdout,"\n Total matching packet count in capture file: %d\n",x);
+  fprintf(stdout,"\n===================================================================\n\n");
+
+  // If no packets were CHDR then just exit now
+  if (x == 0) {
+    exit(0);
+  }
+
+  // Determine host and USRP IP addresses so that we can classify direction of packet flow later.
+ if (host_addr.s_addr == 0x0)
+   get_connection_endpoints(packet_buffer,&host_addr,&usrp_addr);
+
+  // Count packets in list.
+  // Build histogram of packet sizes
+  // Build histogram of Stream ID's
+  packet_buffer->current = packet_buffer->start;
+
+  for (x=0;x<90;x+=1)
+    size_histogram[x][H2U] = size_histogram[x][U2H] = 0;
+
+  size_average[H2U] = size_average[U2H] = 0;
+  packet_count[H2U] = packet_count[U2H] = 0;
+
+  while (packet_buffer->current != NULL) {
+
+    // Overlay IP header on packet payload
+    ip_header = (struct ip_header *)(packet_buffer->current->payload+ETH_SIZE);
+
+    // Identify packet direction
+    if (ip_header->ip_src.s_addr == host_addr.s_addr)
+      direction = H2U;
+    else
+      direction = U2H;
+
+    packet_count[direction]++;
+    size_average[direction]+=(double)packet_buffer->current->size;
+    if ((x=packet_buffer->current->size) > 9000)
+      fprintf(stderr,"Current packet size = %d at absolute time %s, relative time %f, exceeds MTU! Skip counting.",
+	      x,format_gmt(&packet_buffer->current->ts,buffer),(relative_time(&packet_buffer->current->ts,origin_ts)));
+    else
+      size_histogram[x/100][direction]++;
+
+    packet_buffer->current = packet_buffer->current->next;
+
+  }
+
+  fprintf(stdout,"\n===================================================================\n");
+  fprintf(stdout,"\n Average packet size Host -> USRP: %d\n",(int)(size_average[H2U]/packet_count[H2U]));
+  fprintf(stdout,"\n Average packet size USRP -> Host: %d\n",(int)(size_average[U2H]/packet_count[U2H]));
+  fprintf(stdout,"\n===================================================================\n\n");
+
+  //
+  // Now produce packet by packet log
+  //
+  packet_buffer->current = packet_buffer->start;
+  x = 0;
+
+  while (packet_buffer->current != NULL) {
+    x++;
+
+    // Calculate time offset of this packet from start
+    time_since_start = ((double) packet_buffer->current->ts.tv_sec * 1000000 + packet_buffer->current->ts.tv_usec - origin_ts_in_us)/1000000;
+
+
+     dump_header = (u32 *) (packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE);
+
+  /* fprintf(stdout,"DUMP: %08x %08x %08x %08x %08x %08x\n", */
+  /* 	  swapint((int) *(dump_header)), */
+  /* 	  swapint((int) *(dump_header+1)), */
+  /* 	  swapint((int) *(dump_header+2)), */
+  /* 	  swapint((int) *(dump_header+3)), */
+  /* 	  swapint((int) *(dump_header+4)), */
+  /* 	  swapint((int) *(dump_header+5))); */
+
+    // Extract the device portion of the SID to see which packet flow this belongs in
+
+    fprintf(stdout,"%8d %f \t",x,time_since_start);
+    print_direction(packet_buffer,&host_addr,&usrp_addr);
+    fprintf(stdout,"\t");
+    print_size(packet_buffer);
+    fprintf(stdout,"\t");
+    print_sid(packet_buffer);
+    fprintf(stdout,"\t");
+    print_vita_header(packet_buffer,&host_addr);
+    fprintf(stdout,"\n");
+
+    packet_buffer->current = packet_buffer->current->next;
+
+  }
+  // Normal Exit
+  return(0);
+}
+
diff --git a/tools/uhd_dump/uhd_dump.c b/tools/uhd_dump/uhd_dump.c
new file mode 100644
index 000000000..3238d72cf
--- /dev/null
+++ b/tools/uhd_dump/uhd_dump.c
@@ -0,0 +1,531 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <pcap.h>
+#include <netinet/in.h>
+#include <time.h>
+#include <string.h>
+
+#include "uhd_dump.h"
+#include "usrp3_regs.h"
+
+
+// Swap endianness of 64bits
+unsigned long swaplong (unsigned long nLongNumber)
+{
+   union u {unsigned long vi; unsigned char c[sizeof(unsigned long)];};
+   union v {unsigned long ni; unsigned char d[sizeof(unsigned long)];};
+   union u un;
+   union v vn;
+   un.vi = nLongNumber;
+   vn.d[0]=un.c[7];
+   vn.d[1]=un.c[6];
+   vn.d[2]=un.c[5];
+   vn.d[3]=un.c[4];
+   vn.d[4]=un.c[3];
+   vn.d[5]=un.c[2];
+   vn.d[6]=un.c[1];
+   vn.d[7]=un.c[0];
+
+   return (vn.ni);
+}
+
+// Swap endianness of 32bits
+unsigned int swapint (unsigned int nIntNumber)
+{
+   union u {unsigned int vi; unsigned char c[sizeof(unsigned long)];};
+   union v {unsigned int ni; unsigned char d[sizeof(unsigned long)];};
+   union u un;
+   union v vn;
+   un.vi = nIntNumber;
+   vn.d[0]=un.c[3];
+   vn.d[1]=un.c[2];
+   vn.d[2]=un.c[1];
+   vn.d[3]=un.c[0];
+   return (vn.ni);
+}
+
+// Swap Endianness of 16bits
+unsigned short swapshort (unsigned short nShortNumber)
+{
+   union u {unsigned short vi; unsigned char c[sizeof(unsigned short)];};
+   union v {unsigned short ni; unsigned char d[sizeof(unsigned short)];};
+   union u un;
+   union v vn;
+   un.vi = nShortNumber;
+   vn.d[0]=un.c[1];
+   vn.d[1]=un.c[0];
+
+   return (vn.ni);
+}
+
+// Format time from pcap as ascii style.
+char *format_gmt(const struct timeval *ts, char *buffer)
+{
+  time_t seconds;
+  struct tm gmt;
+  seconds = ts->tv_sec;
+  if ((gmtime_r(&seconds, &gmt)) == NULL) {
+    fprintf(stderr, "Fatal time format conversion error.\n");
+    exit(2);
+  }
+  sprintf(buffer,
+        "%04i-%02i-%02iT%02i:%02i:%02i,%03iZ",
+        gmt.tm_year + 1900, gmt.tm_mon + 1, gmt.tm_mday,
+        gmt.tm_hour, gmt.tm_min, gmt.tm_sec, (int) (ts->tv_usec / 1000));
+  return (buffer);
+}
+
+// Takes 2 timeval absolute timevalues, and returns a double value thats the relative time
+// difference normalized to seconds.
+double relative_time(struct timeval *event_ts, struct timeval *origin_ts)
+{
+  struct timeval z;
+  double x;
+  timersub(event_ts,origin_ts,&z);
+  x = (double)z.tv_sec + (double)z.tv_usec/1000000;
+  return x;
+}
+
+// Convert timeval to double, normalized to seconds.
+double timeval2double(struct timeval *event_ts)
+{
+  double x;
+  x = (double)event_ts->tv_sec + (double)event_ts->tv_usec/1000000;
+  return x;
+}
+
+void get_packet(struct pbuf_info *packet_buffer , const struct pcap_pkthdr *header, const u_char *packet)
+{
+  // Get size of new packet
+  packet_buffer->current->size = header->caplen;
+  packet_buffer->current->orig_size = header->len;
+
+  // Allocate memory for packet
+  packet_buffer->current->payload = (char *)malloc((size_t)packet_buffer->current->size);
+
+  // Copy Packet into buffer
+  memcpy(packet_buffer->current->payload,packet,packet_buffer->current->size);
+  packet_buffer->current->ts = header->ts;
+
+  // Allocate memory for next pbuf in chain, init it and shift list.
+  packet_buffer->current->next = malloc(sizeof (struct pbuf));
+  packet_buffer->current->next->last = packet_buffer->current;
+  packet_buffer->current = packet_buffer->current->next;
+}
+
+// This grabs the (absolute) time stamp of the first packet in the cature file, which can be used to
+// derive times relative to the start of the capture file for cross correlation with interactive work
+// in Wireshark
+void get_start_time(struct timeval *ts , const struct pcap_pkthdr *header, const u_char *packet)
+{
+  *ts = header->ts;
+}
+
+void get_udp_port_from_file(const u16 udp_port, const char *filename, struct pbuf_info *packet_buffer, struct timeval *ts)
+{
+  pcap_t *handle;			// Session handle
+  char errbuf[PCAP_ERRBUF_SIZE];	// Error string
+  char filter_exp[256];	                // The ascii filter expression
+  struct bpf_program filter;     	// The compiled filter
+
+  // Open PCAP file for read capture time stamp of first packet
+  if ((handle = pcap_open_offline(filename,errbuf)) == NULL) {
+    fprintf(stderr,"Can't open pcap file for reading: %s\n",errbuf);
+    exit(2);
+  }
+
+  // Parse PCAP file with no filter to grab the time stamp of the first captured packet, which becomes the time origin
+  // local to the capture file.
+  if (pcap_dispatch(handle, 1, (pcap_handler) get_start_time, (u_char *)ts) == -1)  {
+    fprintf(stderr, "Error parsing PCAP file: %s\n", pcap_geterr(handle));
+    exit(2);
+  }
+
+  // Close file again because no way to rewind file descriptor.
+  pcap_close(handle);
+
+  // Open PCAP file for read.
+  if ((handle = pcap_open_offline(filename,errbuf)) == NULL) {
+    fprintf(stderr,"Can't open pcap file for reading: %s\n",errbuf);
+    exit(2);
+  }
+
+  // Build ASCII filter expression from UDP port
+  sprintf(filter_exp,"udp port %d",udp_port);
+  printf("\nBPF filter is udp port %d\n",udp_port);
+
+  // Compile filter string to BPF
+  if (pcap_compile(handle, &filter, filter_exp, 0, 0) == -1) {
+    fprintf(stderr, "Couldn't parse filter %s: %s\n", filter_exp, pcap_geterr(handle));
+    exit(2);
+  }
+
+  // Apply filter
+  if (pcap_setfilter(handle, &filter) == -1) {
+    fprintf(stderr, "Couldn't install filter %s: %s\n", filter_exp, pcap_geterr(handle));
+    exit(2);
+  }
+
+  // Allocate and initialize packet buffer linked list
+  packet_buffer->start = packet_buffer->current = malloc(sizeof (struct pbuf));
+  packet_buffer->start->last = NULL;
+
+  // Parse PCAP file using filter, collect all interesting packets.
+  if (pcap_dispatch(handle, -1, (pcap_handler) get_packet, (u_char *)packet_buffer) == -1)  {
+    fprintf(stderr, "Error parsing PCAP file: %s\n", pcap_geterr(handle));
+    exit(2);
+  }
+
+  // If no packets matched in the capture then linked list should be completely empty.
+  if ( packet_buffer->start == packet_buffer->current) {
+    free(packet_buffer->current);
+    packet_buffer->start = packet_buffer->current = NULL;
+  } else {
+    // Note the last used buffer in the list. Removed allocated but unused buffer from list and free
+    packet_buffer->end = packet_buffer->current->last;
+    packet_buffer->end->next = NULL;
+    free(packet_buffer->current);
+  }
+}
+
+//
+// Read a pcap file into memory.
+//
+void get_everything_from_file(const char *filename, struct pbuf_info *packet_buffer, struct timeval *ts)
+{
+  pcap_t *handle;			// Session handle
+  char errbuf[PCAP_ERRBUF_SIZE];	// Error string
+
+  // Open PCAP file for read capture time stamp of first packet
+  if ((handle = pcap_open_offline(filename,errbuf)) == NULL) {
+    fprintf(stderr,"Can't open pcap file for reading: %s\n",errbuf);
+    exit(2);
+  }
+
+  // Parse PCAP file with no filter to grab the time stamp of the first captured packet, which becomes the time origin
+  // local to the capture file.
+  if (pcap_dispatch(handle, 1, (pcap_handler) get_start_time, (u_char *)ts) == -1)  {
+    fprintf(stderr, "Error parsing PCAP file: %s\n", pcap_geterr(handle));
+    exit(2);
+  }
+
+  // Close file again because no way to rewind file descriptor.
+  pcap_close(handle);
+
+  // Open PCAP file for read
+  if ((handle = pcap_open_offline(filename,errbuf)) == NULL) {
+    fprintf(stderr,"Can't open pcap file for reading: %s\n",errbuf);
+    exit(2);
+  }
+
+  // Allocate and initialize packet buffer linked list
+  packet_buffer->start = packet_buffer->current = malloc(sizeof (struct pbuf));
+  packet_buffer->start->last = NULL;
+
+  // Parse PCAP file using filter, collect all interesting packets.
+  if (pcap_dispatch(handle, -1, (pcap_handler) get_packet, (u_char *)packet_buffer) == -1)  {
+    fprintf(stderr, "Error parsing PCAP file: %s\n", pcap_geterr(handle));
+    exit(2);
+  }
+
+  // If no packets matched in the capture then linked list should be completely empty.
+  if ( packet_buffer->start == packet_buffer->current) {
+    free(packet_buffer->current);
+    packet_buffer->start = packet_buffer->current = NULL;
+  } else {
+    // Note the last used buffer in the list. Removed allocated but unused buffer from list and free
+    packet_buffer->end = packet_buffer->current->last;
+    packet_buffer->end->next = NULL;
+    free(packet_buffer->current);
+  }
+}
+
+
+// Debug
+void print_raw(const struct pbuf_info *packet_buffer, const int count)
+{
+  const u8 *raw;
+  int x;
+  raw = (u8 *) packet_buffer;
+  fprintf(stdout,"  ");
+  for (x = 0; x<count; x++)
+    fprintf(stdout,"%02x ",*(raw+x));
+}
+
+// Print to STDOUT the direction of this packet flow
+void print_direction(const struct pbuf_info *packet_buffer, const struct in_addr *host_addr, const struct in_addr *usrp_addr)
+{
+ const struct ip_header *ip_header;
+
+ // Overlay IP header on packet payload
+ ip_header = (struct ip_header *)(packet_buffer->current->payload+ETH_SIZE);
+
+ if ((host_addr->s_addr == ip_header->ip_src.s_addr) && (usrp_addr->s_addr == ip_header->ip_dst.s_addr))
+   fprintf(stdout,"Host->USRP");
+ else if  ((host_addr->s_addr == ip_header->ip_dst.s_addr) && (usrp_addr->s_addr == ip_header->ip_src.s_addr))
+    fprintf(stdout,"USRP->Host");
+ else
+   fprintf(stdout,"UNKNOWN");
+}
+
+// Print to STDOUT the CHDR size in bytes
+void print_size(const struct pbuf_info *packet_buffer)
+{
+  const struct chdr_header *chdr_header;
+
+  // Overlay CHDR header on packet payload
+  chdr_header = (struct chdr_header *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE);
+
+  fprintf(stdout,"Size: %04d ",(swapint(chdr_header->chdr_type) & SIZE));
+}
+
+// Print to STDOUT the CHDR SID decode
+void print_sid(const struct pbuf_info *packet_buffer)
+{
+  const struct chdr_header *chdr_header;
+  const struct chdr_sid *chdr_sid;
+
+  // Overlay CHDR header on packet payload
+  chdr_header = (struct chdr_header *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE);
+
+  // Overlay CHDR SID definition on CHDR SID.
+  chdr_sid = (struct chdr_sid *)&(chdr_header->chdr_sid);
+
+  fprintf(stdout,"%02x.%02x->%02x.%02x",chdr_sid->src_device,chdr_sid->src_endpoint,chdr_sid->dst_device,chdr_sid->dst_endpoint);
+}
+
+// Print to STDOUT a decoded tx response packet payload.
+void print_tx_response(const struct tx_response *tx_response)
+{
+  switch(swapint(tx_response->error_code))
+    {
+    case TX_ACK: fprintf(stdout,"ACK "); break;
+    case TX_EOB: fprintf(stdout,"EOB "); break;
+    case TX_UNDERRUN: fprintf(stdout,"Underrun "); break;
+    case TX_SEQ_ERROR: fprintf(stdout,"Sequence Error "); break;
+    case TX_TIME_ERROR: fprintf(stdout,"Time Error "); break;
+    case TX_MIDBURST_SEQ_ERROR: fprintf(stdout,"Mid-Burst Seq Errror "); break;
+    default: fprintf(stdout,"Unknown Error ");
+    }
+  fprintf(stdout,"for SeqID = %03x ",swapint(tx_response->seq_id)&0xFFF);
+}
+
+
+
+// Returns Name of a register from it's address
+char *reg_addr_to_name(const u32 addr)
+{
+  int x;
+  x = 0;
+  while((reg_list[x].addr != addr) && (reg_list[x].addr != 999))
+    x++;
+  return(reg_list[x].name);
+}
+
+// Print to STDOUT decode of CHDR header including time if present.
+void print_vita_header(const struct pbuf_info *packet_buffer, const struct in_addr *host_addr)
+{
+  const struct ip_header *ip_header;
+  const struct chdr_header *chdr_header;
+  const struct chdr_sid *chdr_sid;
+  const struct radio_ctrl_payload *radio_ctrl_payload;
+  const struct radio_response *radio_response;
+  const struct tx_response *tx_response;
+  const struct src_flow_ctrl *src_flow_ctrl;
+  const struct vita_time *vita_time;
+  int direction;
+  u8 endpoint;
+  int has_time;
+
+  // Overlay IP header on packet payload
+  ip_header = (struct ip_header *)(packet_buffer->current->payload+ETH_SIZE);
+
+  // Overlay CHDR header on packet payload
+  chdr_header = (struct chdr_header *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE);
+
+  // Overlay CHDR SID definition on CHDR SID.
+  chdr_sid = (struct chdr_sid *)&(chdr_header->chdr_sid);
+
+  // Identify packet direction
+  if (ip_header->ip_src.s_addr == host_addr->s_addr)
+    direction = H2U;
+  else
+    direction = U2H;
+
+  // Decode packet type
+
+
+  if ((swapint(chdr_header->chdr_type) & EXT_CONTEXT) == EXT_CONTEXT)  fprintf(stdout,"Context Ext ");
+  else  fprintf(stdout,"IF Data     ");
+
+  // Determine USRP Sink/Src Endpoint
+  if (direction==H2U)
+    endpoint = (chdr_sid->dst_endpoint) & 0x3;
+  else if (direction==U2H)
+    endpoint = (chdr_sid->src_endpoint) & 0x3;
+
+  // Look for CHDR EOB flags.
+  if ((swapint(chdr_header->chdr_type) & EOB) == EOB)  fprintf(stdout,"EOB ");
+  else fprintf(stdout,"    ");
+
+  // Is there embeded VITA time?
+  if ((swapint(chdr_header->chdr_type) & HAS_TIME) == HAS_TIME) {
+    vita_time = (struct vita_time *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE+CHDR_SIZE);
+    fprintf(stdout,"Time=%016lx ",swaplong(vita_time->time));
+    has_time = 1;
+  } else {
+    fprintf(stdout,"                      ");
+    has_time = 0;
+  }
+
+  fprintf(stdout,"SeqID=%03x  ",(swapint(chdr_header->chdr_type)>>16)&0xFFF);
+
+  // Print Payload
+  if (endpoint == RADIO)
+    {
+      if ((swapint(chdr_header->chdr_type) & EXT_CONTEXT) != EXT_CONTEXT)
+	{
+	  if (direction == H2U)
+	    {
+	      fprintf(stdout,"TX IF Data ");
+	    }
+	  else
+	    // U2H
+	    {
+	      fprintf(stdout,"RX IF Data ");
+	    }
+	}
+      else if ((swapint(chdr_header->chdr_type) & EXT_CONTEXT) == EXT_CONTEXT)
+	{
+	  if (direction == H2U)
+	    {
+	      // BAD PACKET
+	    }
+	  else
+	    // U2H
+	    {
+	      // TX Response packet.
+	      tx_response = (struct tx_response *) (packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE+CHDR_SIZE+(has_time?VITA_TIME_SIZE:0));
+	      print_tx_response(tx_response);
+	    }
+	}
+    }
+  else if (endpoint == RADIO_CTRL)
+    {
+      fprintf(stdout,"\t\t\t");
+      if ((swapint(chdr_header->chdr_type) & EXT_CONTEXT) != EXT_CONTEXT)
+	{
+	  // BAD PACKET
+	}
+      else if ((swapint(chdr_header->chdr_type) & EXT_CONTEXT) == EXT_CONTEXT)
+	{
+	if (direction == H2U)
+	    {
+	      radio_ctrl_payload = (struct radio_ctrl_payload *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE+CHDR_SIZE+(VITA_TIME_SIZE*has_time));
+	      fprintf(stdout,"Radio Ctrl %s(0x%02x)=0x%08x",reg_addr_to_name(swapint(radio_ctrl_payload->addr)),(u8)swapint(radio_ctrl_payload->addr),swapint(radio_ctrl_payload->data));
+	    }
+	  else
+	    // U2H
+	    {
+	      radio_response = (struct radio_response *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE+CHDR_SIZE+(VITA_TIME_SIZE*has_time));
+	      fprintf(stdout,"Radio Response = 0x%016lx",swaplong(radio_response->data));
+	    }
+	}
+    }
+  else if (endpoint == SRC_FLOW_CTRL)
+    {
+      if  ((swapint(chdr_header->chdr_type) & EXT_CONTEXT) != EXT_CONTEXT)
+	{
+	  // BAD PACKET
+	}
+      else if  ((swapint(chdr_header->chdr_type) & EXT_CONTEXT) == EXT_CONTEXT)
+	{
+	  if (direction == H2U)
+	    {
+	      src_flow_ctrl = (struct src_flow_ctrl *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE+CHDR_SIZE+(VITA_TIME_SIZE*has_time));
+	      fprintf(stdout,"Src Flow Ctrl = 0x%04x",swapint(src_flow_ctrl->seq_id));
+	    }
+	  else
+	    // U2H
+	    {
+	      // Bad Packet
+	    }
+	}
+    }
+  //print_raw((struct pbuf_info *)vrt_header,16);
+}
+
+
+// Find IP addresses for Host and USRP in this Session
+
+void get_connection_endpoints( struct pbuf_info *packet_buffer,  struct in_addr *host_addr, struct in_addr *usrp_addr)
+{
+  const struct ip_header *ip_header;
+  const struct chdr_header *chdr_header;
+  const struct chdr_sid *chdr_sid;
+
+  // Determine which side of the stream is Host and which is USRP by probing capture until a
+  // CHDR message type is discovered. The SID reveals which direction the packet is traveling.
+  // Then record apparent IP addresses of Host and USRP for future packet clasification.
+  packet_buffer->current = packet_buffer->start;
+
+  host_addr->s_addr = 0x0;
+  usrp_addr->s_addr = 0x0;
+
+  while (packet_buffer->current != NULL) {
+
+    // Overlay IP header on packet payload
+    ip_header = (struct ip_header *)(packet_buffer->current->payload+ETH_SIZE);
+
+    // Overlay CHDR header on packet payload
+    chdr_header = (struct chdr_header *)(packet_buffer->current->payload+ETH_SIZE+IP_SIZE+UDP_SIZE);
+
+    // Overlay CHDR SID definition on CHDR SID.
+    chdr_sid = (struct chdr_sid *)&(chdr_header->chdr_sid);
+
+
+    // Catagorise stream
+    // CHDR is actually quite hard to conclusively detect, the following deductions help...
+    // For CHDR v2 bit 62 should always be 0 (reserved)
+    // Bit 47 should always be 0 because sizes > 8192 are unsupport be typical ethernet MTU's
+    // By convention currently the host uses SID address 0.x so the first packets in a new UHD session
+    // should flow from Host to Device hence [31:24] = 0.
+    if (
+	((swapint(chdr_header->chdr_type) & 0x40000000) != 0x0) ||
+	((swapint(chdr_header->chdr_type) & 0x8000) != 0x0) ||
+	((swapint(chdr_header->chdr_sid) & 0xFF000000) != 0x0) ||
+	((swapint(chdr_header->chdr_sid) & 0x0000FF00) == 0x0)
+	)
+      fprintf(stderr,"Current packet is not CHDR. Skipping.");
+    else
+      {
+	// Implicitly CHDR (At least that is our best guess)
+	// Go take a look at the SID and see who is boss.
+	if ((chdr_sid->src_device == 0) && (chdr_sid->dst_device != 0))
+	  {
+	    // Host->USRP
+	    host_addr->s_addr = ip_header->ip_src.s_addr;
+	    usrp_addr->s_addr = ip_header->ip_dst.s_addr;
+	    break;
+	  }
+	else if ((chdr_sid->src_device == 0) && (chdr_sid->dst_device != 0))
+	  {
+	    // USRP->Host
+	    usrp_addr->s_addr = ip_header->ip_src.s_addr;
+	    host_addr->s_addr = ip_header->ip_dst.s_addr;
+	    break;
+	  }
+	else
+	  {
+	    fprintf(stderr,"Malformed CHDR packet, SID is unexpected value: 0x%x",swapint(chdr_header->chdr_sid));
+	  }
+      }
+    packet_buffer->current = packet_buffer->current->next;
+  }
+
+  if (host_addr->s_addr == 0) {
+    fprintf(stderr, "Could not identify Host/USRP direction in capture analysis, exiting.\n");
+    exit(2);
+  }
+}
diff --git a/tools/uhd_dump/uhd_dump.h b/tools/uhd_dump/uhd_dump.h
new file mode 100644
index 000000000..2c36f9a39
--- /dev/null
+++ b/tools/uhd_dump/uhd_dump.h
@@ -0,0 +1,238 @@
+
+#ifndef _UHD_DUMP_H_
+#define _UHD_DUMP_H_
+
+
+
+#define FALSE 0
+#define TRUE 1
+#define UNKNOWN 2
+
+// Define directions for Host->USRP & USRP->Host
+#define H2U 0
+#define U2H 1
+
+// Endpoint encodings for USRP3 from SID LSB's
+#define RADIO 0
+#define RADIO_CTRL 1
+#define SRC_FLOW_CTRL 2
+#define RESERVED 3
+
+/* // VRT Type definitions */
+/* #define IF_DATA_NO_SID 0 */
+/* #define IF_DATA_WITH_SID 1 */
+/* #define EXT_DATA_NO_SID 2 */
+/* #define EXT_DATA_WITH_SID 3 */
+/* #define IF_CONTEXT 4 */
+/* #define EXT_CONTEXT 5 */
+
+// CHDR bit masks
+#define EXT_CONTEXT 1<<31
+#define HAS_TIME 1<<29
+#define EOB 1<<28
+#define SIZE (1<<16)-1
+
+
+// UDP used as source for all CHDR comms.
+#define CHDR_PORT 49153
+
+typedef unsigned char bool;
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+typedef unsigned long u64;
+
+union ip_addr_decoder {
+  unsigned long s_addr;
+  unsigned char octet[4];
+};
+
+/*
+Ethernet header structure
+*/
+
+struct ethernet_header {
+  u8 eth_dst[6]; // MAC addr of destination
+  u8 eth_src[6]; // MAC addr of source
+  u16 eth_typ;   // Payload protocol type
+};
+
+#define ETH_SIZE 14
+
+/*
+  IP Header strcture
+  NOTE: Network byte order (Big Endian)
+*/
+
+struct ip_header {
+  u8 ip_vhl;   // [7:4] Version, [3:0] Header Length
+  u8 ip_tos;   // Type of Service/DIff Serv/ECN
+  u16 ip_len;  // Total Length
+  u16 ip_id;   // Identification
+  u16 ip_off;  // [15:14] Flags, [13:0] Fragment Offset
+  u8 ip_ttl;   // Time To Live
+  u8 ip_pro;   // Protocol
+  u16 ip_sum;  // Checksum
+  struct in_addr ip_src; // IP Source address
+  struct in_addr ip_dst; // IP Destination address
+};
+
+#define IP_SIZE 20
+
+/*
+  UDP Header Structure
+  NOTE: Network byte order (Big Endian)
+*/
+
+struct udp_header {
+  u16 udp_src;  // Source Port
+  u16 udp_dst;  // Destination Port
+  u16 udp_len;  // Length
+  u16 udp_sum;  // Checksum
+};
+
+#define UDP_SIZE 8
+
+/* /\* */
+/* VITA49 VRLP Header */
+/* NOTE: Network byte order (Big Endian) */
+/* *\/ */
+
+/* struct vrlp_header { */
+/*   u32 vrlp_start; // Hardcoded to ASCII "VRLP" */
+/*   u32 vrlp_size;  // [31:20] Frame Count, [19:0] Frame Size */
+/* }; */
+
+/* #define VRLP_SIZE 8 */
+
+/* #define VRLP_SEQID(x)  (((x & 0xff)<<4) | ((x & 0xf000) >> 12)) */
+
+/* /\* */
+/* VITA49 VRLP Trailer */
+/* NOTE: Network byte order (Big Endian) */
+/* *\/ */
+
+/* struct vrlp_trailer { */
+/*   u32 vrlp_end; // Hardcoded to ASCII "VEND" */
+/* }; */
+
+/* #define VRLP_TRAILER_SIZE 4 */
+
+/* /\* */
+/* VITA49 VRT Header  */
+/* NOTE: Network byte order (Big Endian) */
+/* *\/ */
+
+/* struct vrt_header { */
+/*   u8 vrt_type; // [7:4] type, [3] Class ID flag, [2] Trailer flag, [1] SOB, [0] EOB  */
+/*   u8 vrt_count; // [7:6] TSI, [5:4] TSF, [3:0] Packet Count modulo 16 */
+/*   u16 vrt_size; // Number of 32bit words in VRT packet including headers and payload. */
+/*   u32 vrt_sid; // Stream ID */
+/* }; */
+
+/* #define VRT_SIZE 8 */
+
+
+/*
+Ettus Research CHDR header
+NOTE: Little endian byte order (must be unswizzled)
+*/
+
+struct chdr_header {
+  u32 chdr_type;// [31] Ext Context, [30] RSVD, [29] Has_time, [28] EOB], [27:16] SEQ_ID, [15:0] Size
+  u32 chdr_sid; // Stream ID
+};
+
+#define CHDR_SIZE 8
+
+/*
+Break down SID into CHDR defined fields
+*/
+struct chdr_sid {
+  u8 src_device;
+  u8 src_endpoint;
+  u8 dst_device;
+  u8 dst_endpoint;
+};
+
+struct radio_ctrl_payload {
+  u32 addr;
+  u32 data;
+};
+
+struct radio_response {
+  u64 data;
+};
+
+struct tx_response {
+  u32 error_code;
+  u32 seq_id;
+};
+
+#define TX_ACK 0x00
+#define TX_EOB 0x01
+#define TX_UNDERRUN 0x02
+#define TX_SEQ_ERROR 0x04
+#define TX_TIME_ERROR 0x08
+#define TX_MIDBURST_SEQ_ERROR 0x20
+
+struct src_flow_ctrl {
+  u32 unused;
+  u32 seq_id;
+};
+
+struct vita_time {
+  u64 time;
+};
+
+#define VITA_TIME_SIZE 8
+#define RADIO_CTRL_SIZE 8
+#define RADIO_RESPONSE_SIZE 4
+
+
+/*
+  Packet storage
+*/
+
+struct pbuf {
+  struct pbuf *next;
+  struct pbuf *last;
+  struct timeval ts;
+  int size;                 // Size stored in pcap file
+  int orig_size;            // Original capture size on the wire
+  char *payload;
+};
+
+struct pbuf_info {
+  struct pbuf *start;
+  struct pbuf *current;
+  struct pbuf *end;
+};
+
+struct radio_ctrl_names {
+  u32 addr;
+  char *name;
+};
+
+
+//
+// Prototypes
+//
+
+unsigned long swaplong (unsigned long);
+unsigned int swapint (unsigned int);
+unsigned short swapshort (unsigned short);
+char *format_gmt(const struct timeval *, char *);
+double timeval2double(struct timeval *);
+double relative_time(struct timeval *, struct timeval *);
+void get_packet(struct pbuf_info * , const struct pcap_pkthdr *, const u_char *);
+void get_start_time(struct timeval * , const struct pcap_pkthdr *, const u_char *);
+void get_udp_port_from_file(u16, const char *, struct pbuf_info *, struct timeval *);
+void get_everything_from_file(const char *, struct pbuf_info *, struct timeval *);
+void get_connection_endpoints( struct pbuf_info *, struct in_addr *, struct in_addr *);
+void print_direction(const struct pbuf_info *, const struct in_addr *, const struct in_addr *);
+void print_size( const struct pbuf_info *);
+void print_sid( const struct pbuf_info *);
+void print_vita_header( const struct pbuf_info *, const struct in_addr *);
+
+#endif
diff --git a/tools/uhd_dump/usrp3_regs.h b/tools/uhd_dump/usrp3_regs.h
new file mode 100644
index 000000000..5e3fc1cac
--- /dev/null
+++ b/tools/uhd_dump/usrp3_regs.h
@@ -0,0 +1,51 @@
+
+const struct radio_ctrl_names reg_list[] =
+  {
+    {5,   "SR_DACSYNC"},
+    {6,   "SR_LOOPBACK"},
+    {7,   "SR_TEST"},
+    {8,   "SR_SPI_DIVIDER"},
+    {9,   "SR_SPI_CONFIG"},
+    {10,  "SR_SPI_DATA"},
+    {16,  "SR_GPIO_IDLE"},
+    {17,  "SR_GPIO_RX"},
+    {18,  "SR_GPIO_TX"},
+    {19,  "SR_GPIO_FDX"},
+    {20,  "SR_GPIO_DDR"},
+    {24,  "SR_MISC_OUTS"},
+    {32,  "SR_READBACK"},
+    {64,  "SR_ERROR_POLICY"},
+    {66,  "SR_CYCLES"},
+    {67,  "SR_PACKETS"},
+    {96,  "SR_RX_CTRL_CMD"},
+    {97,  "SR_RX_CTRL_TIME_H"},
+    {98,  "SR_RX_CTRL_TIME_L"},
+    {99,  "SR_RX_CTRL_RX_HALT"},
+    {100, "SR_RX_CTRL_MAXLEN"},
+    {101, "SR_RX_CTRL_SID"},
+    {102, "SR_RX_CTRL_WINDOW_SIZE"},
+    {103, "SR_RX_CTRL_WINDOW_ENABLE"},
+    {128, "SR_TIME_HI"},
+    {129, "SR_TIME_LO"},
+    {130, "SR_TIME_CTRL"},
+    {144, "SR_RX_DSP_0"},
+    {145, "SR_RX_DSP_1"},
+    {146, "SR_RX_DSP_2"},
+    {147, "SR_RX_DSP_3"},
+    {184, "SR_TX_DSP_0"},
+    {185, "SR_TX_DSP_1"},
+    {186, "SR_TX_DSP_2"},
+    {196, "SR_LEDS_IDLE"},
+    {197, "SR_LEDS_RX"},
+    {198, "SR_LEDS_TX"},
+    {199, "SR_LEDS_FDX"},
+    {200, "SR_LEDS_DDR"},
+    {208, "SR_SWAP_IQ"},
+    {209, "SR_MAG_CORR"},
+    {210, "SR_PHASE_CORR"},
+    {211, "SR_RX_DC_OFFSET_I"},
+    {212, "SR_RX_DC_OFFSET_Q"},
+    {999, "NOT FOUND"}
+  }
+;
+