From b048d918b64eeee387b22cf3ff78da7354c1c6a2 Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@ettus.com>
Date: Thu, 9 Oct 2014 20:17:17 +0200
Subject: tools: Added Balints ZPU dissector

---
 tools/zpu-dissector/packet-zpu.c | 209 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 209 insertions(+)
 create mode 100644 tools/zpu-dissector/packet-zpu.c

(limited to 'tools/zpu-dissector/packet-zpu.c')

diff --git a/tools/zpu-dissector/packet-zpu.c b/tools/zpu-dissector/packet-zpu.c
new file mode 100644
index 000000000..4bff97912
--- /dev/null
+++ b/tools/zpu-dissector/packet-zpu.c
@@ -0,0 +1,209 @@
+/* 
+ * 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/>.
+ *
+ */
+
+#include "config.h"
+
+#include <glib.h>
+#include <epan/packet.h>
+#include <ctype.h>
+#include <stdio.h>
+
+#define LOG_HEADER  "[ZPU] "
+
+#ifndef min
+#define min(a,b)    ((a<b)?a:b)
+#endif // min
+
+const unsigned int FW_PORT = 49152;
+
+static int proto_zpu = -1;
+static int hf_zpu_flags = -1;
+static int hf_zpu_flags_ack = -1;
+static int hf_zpu_flags_error = -1;
+static int hf_zpu_flags_poke = -1;
+static int hf_zpu_flags_peek = -1;
+static int hf_zpu_seq = -1;
+static int hf_zpu_addr = -1;
+static int hf_zpu_data = -1;
+static int hf_zpu_shmem_addr = -1;
+
+/* Subtree handles: set by register_subtree_array */
+static gint ett_zpu = -1;
+static gint ett_zpu_flags = -1;
+//static gint ett_zpu_shmem = -1;
+
+/* Forward-declare the dissector functions */
+void proto_register_zpu(void);
+void proto_reg_handoff_zpu(void);
+static void dissect_zpu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree);
+
+/* The dissector itself */
+static void dissect_zpu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
+    proto_item *item;
+    proto_tree *zpu_tree;
+    proto_item *flags_item;
+    proto_tree *flags_tree;
+    gint len;
+    
+    gboolean is_network;
+    gint endianness;
+    
+    if(pinfo->match_uint == FW_PORT){
+        is_network = TRUE;
+        endianness = ENC_BIG_ENDIAN;
+    }
+    else{
+        is_network = FALSE;
+        endianness = ENC_LITTLE_ENDIAN;
+    }
+
+    len = tvb_reported_length(tvb);
+
+    col_append_str(pinfo->cinfo, COL_PROTOCOL, "/ZPU");
+    col_append_sep_fstr(pinfo->cinfo, COL_INFO, NULL, "ZPU", tvb_format_text_wsp(tvb, 0, len));
+
+    if (tree)
+    {
+        item = proto_tree_add_item(tree, proto_zpu, tvb, 0, min(16, len), ENC_NA);
+        
+        if (len >= 4)
+        {
+            zpu_tree = proto_item_add_subtree(item, ett_zpu);
+            
+            flags_item = proto_tree_add_item(zpu_tree, hf_zpu_flags, tvb, 0, 4, endianness);
+            flags_tree = proto_item_add_subtree(flags_item, ett_zpu_flags);
+
+            proto_tree_add_item(flags_tree, hf_zpu_flags_ack, tvb, 0, 4, ENC_NA);
+            proto_tree_add_item(flags_tree, hf_zpu_flags_error, tvb, 0, 4, ENC_NA);
+            proto_tree_add_item(flags_tree, hf_zpu_flags_poke, tvb, 0, 4, ENC_NA);
+            proto_tree_add_item(flags_tree, hf_zpu_flags_peek, tvb, 0, 4, ENC_NA);
+            
+            if (len >= 8)
+            {
+                proto_tree_add_item(zpu_tree, hf_zpu_seq, tvb, 4, 4, ENC_NA);
+                
+                if (len >= 12)
+                {
+                    proto_tree_add_item(zpu_tree, hf_zpu_addr, tvb, 8, 4, ENC_NA);
+                    
+                    guint8 *bytes = tvb_get_string(tvb, 8, 4);
+                    unsigned int addr = 0;
+                    memcpy(&addr, bytes, 4);
+                    const unsigned int shmmem_base = 0x6000;
+                    addr = (addr >> 24) | ((addr & 0x00FF0000) >> 8) | ((addr & 0x0000FF00) << 8) | ((addr & 0x000000FF) << 24);
+                    if (addr >= shmmem_base)
+                    {
+                        addr -= 0x6000;
+                        addr /= 4;
+                        
+                        proto_tree_add_uint(zpu_tree, hf_zpu_shmem_addr, tvb, 8, 4, addr);
+                    }
+                    
+                    if (len >= 16)
+                    {
+                        proto_tree_add_item(zpu_tree, hf_zpu_data, tvb, 12, 4, ENC_NA);
+                    }
+                }
+            }
+        }
+    }
+}
+
+void proto_register_zpu(void)
+{
+    static hf_register_info hf[] = {
+        { &hf_zpu_flags,
+            { "Flags", "zpu.flags",
+                FT_UINT32, BASE_HEX,
+                NULL, 0x0,
+                NULL, HFILL }
+        },
+            { &hf_zpu_flags_ack,
+                { "ACK", "zpu.flags.ack",
+                    FT_BOOLEAN, BASE_NONE,
+                    NULL, 0x1,
+                    NULL, HFILL }
+            },
+            { &hf_zpu_flags_error,
+                { "Error", "zpu.flags.error",
+                    FT_BOOLEAN, BASE_NONE,
+                    NULL, 0x2,
+                    NULL, HFILL }
+            },
+            { &hf_zpu_flags_poke,
+                { "Poke", "zpu.flags.poke",
+                    FT_BOOLEAN, BASE_NONE,
+                    NULL, 0x4,
+                    NULL, HFILL }
+            },
+            { &hf_zpu_flags_peek,
+                { "Peek", "zpu.flags.peek",
+                    FT_BOOLEAN, BASE_NONE,
+                    NULL, 0x8,
+                    NULL, HFILL }
+            },
+        { &hf_zpu_seq,
+            { "Sequence ID", "zpu.seq",
+                FT_UINT32, BASE_HEX,
+                NULL, 0x0,
+                NULL, HFILL }
+        },
+        { &hf_zpu_addr,
+            { "Address", "zpu.addr",
+                FT_UINT32, BASE_HEX,
+                NULL, 0x0,
+                NULL, HFILL }
+        },
+        { &hf_zpu_shmem_addr,
+            { "SHMEM section", "zpu.shmem",
+                FT_UINT32, BASE_DEC,
+                NULL, 0x0,
+                NULL, HFILL }
+        },
+        { &hf_zpu_data,
+            { "Data", "zpu.data",
+                FT_UINT32, BASE_HEX,
+                NULL, 0x0,
+                NULL, HFILL }
+        },
+    };
+
+    static gint *ett[] = {
+        &ett_zpu,
+        &ett_zpu_flags,
+        //&ett_zpu_shmem
+    };
+
+    proto_zpu = proto_register_protocol("ZPU FW", "ZPU", "zpu");
+    proto_register_field_array(proto_zpu, hf, array_length(hf));
+    proto_register_subtree_array(ett, array_length(ett));
+    register_dissector("zpu", dissect_zpu, proto_zpu);
+}
+
+/* Handler registration */
+void proto_reg_handoff_zpu(void)
+{
+    /* register dissector for UDP packets */
+    static dissector_handle_t zpu_handle;
+    zpu_handle = create_dissector_handle(dissect_zpu, proto_zpu);
+    dissector_add_uint("udp.port", FW_PORT, zpu_handle);
+}
-- 
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