Un-doing firmware change regarding ICMP packate handling.

Reverting "x300: ICMP_DUR handler fixed. Supposedly closes #256."
This reverts commit 69317629f353734d5ac21dc78be105b2f0164497.

Resolved Conflicts:
	firmware/x300/x300/x300_main.c

1 files changed, 34 insertions, 44 deletions

diff --git a/firmware/x300/x300/x300_main.c b/firmware/x300/x300/x300_main.c
index a15afd196..7d6771bc7 100644
--- a/firmware/x300/x300/x300_main.c
+++ b/firmware/x300/x300/x300_main.c
@@ -66,14 +66,8 @@ void handle_udp_prog_framer(
     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);
-  }
 }
 
 /***********************************************************************
@@ -86,42 +80,42 @@ void handle_udp_fw_comms(
     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));
+    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);
-                }
+    //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);
             }
         }
 
-        //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));
+        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));
+    }
 }
 
 /***********************************************************************
@@ -138,9 +132,7 @@ void handle_udp_fpga_prog(
     x300_fpga_prog_flags_t reply = {0};
     bool status = true;
 
-    if (buff == NULL) {
-        return;
-    } else if (num_bytes < offsetof(x300_fpga_prog_t, data)) {
+    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) {
@@ -191,7 +183,7 @@ void handle_udp_fpga_prog(
 /***********************************************************************
  * Handler for MTU detection
  **********************************************************************/
-void handle_udp_mtu_detect(
+void handle_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,
@@ -201,9 +193,7 @@ void handle_udp_mtu_detect(
     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)) {
+    if (!(request->flags & X300_MTU_DETECT_ECHO_REQUEST)) {
         printf("DEBUG: MTU detect got unknown request\n");
         reply.flags |= X300_MTU_DETECT_ERROR;
     }
@@ -426,7 +416,7 @@ int main(void)
     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);
+    u3_net_stack_register_udp_handler(X300_MTU_DETECT_UDP_PORT, &handle_mtu_detect);
 
     uint32_t last_cronjob = 0;