epan/dissectors/packet-ax4000.c

   1 /* packet-ax4000.c
   2  * Routines for Spirent AX/4000 Test Block dissection
   3  * Copyright 2004, SEKINE Hideki <sekineh@gf7.so-net.ne.jp>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  */
  25
  26 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <glib.h>
  31
  32 #include <epan/packet.h>
  33 #include <ipproto.h>
  34
  35 /* Initialize the protocol and registered fields */
  36 static int proto_ax4000 = -1;
  37 static int hf_ax4000_port = -1;
  38 static int hf_ax4000_chassis = -1;
  39 static int hf_ax4000_fill = -1;
  40 static int hf_ax4000_index = -1;
  41 static int hf_ax4000_timestamp = -1;
  42 static int hf_ax4000_seq = -1;
  43 static int hf_ax4000_crc = -1;
  44
  45 /* Initialize the subtree pointers */
  46 static gint ett_ax4000 = -1;
  47
  48 /* Code to actually dissect the packets */
  49 static void
  50 dissect_ax4000(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  51 {
  52         proto_item *ti;
  53         proto_tree *ax4000_tree;
  54
  55         guint8  ax_port;
  56         guint8  ax_chassis;
  57         guint16 ax_index;
  58         guint32 ax_seq;
  59         guint32 ax_timestamp;
  60
  61         /* Make entries in Protocol column and Info column on summary display */
  62         col_set_str(pinfo->cinfo, COL_PROTOCOL, "AX4000");
  63         col_clear(pinfo->cinfo, COL_INFO);
  64
  65         ax_port = tvb_get_guint8(tvb, 0);
  66         ax_chassis = tvb_get_guint8(tvb, 1);
  67         ax_index = tvb_get_ntohs(tvb, 2) & 0x0FFF;
  68         ax_timestamp = tvb_get_letohl(tvb, 6);
  69         ax_seq = tvb_get_letohl(tvb, 10);
  70
  71         col_append_fstr(pinfo->cinfo, COL_INFO,
  72                         "Chss:%u Prt:%u Idx:%u Seq:0x%08x TS:%.6f[msec]",
  73                         ax_chassis, ax_port, ax_index, ax_seq, ax_timestamp*1e-5);
  74
  75         if (tree) {
  76                 /* create display subtree for the protocol */
  77                 ti = proto_tree_add_item(tree, proto_ax4000, tvb, 0, -1, FALSE);
  78
  79                 ax4000_tree = proto_item_add_subtree(ti, ett_ax4000);
  80
  81                 proto_tree_add_uint(ax4000_tree,
  82                     hf_ax4000_port, tvb, 0, 1, ax_port);
  83                 proto_tree_add_uint(ax4000_tree,
  84                     hf_ax4000_chassis, tvb, 1, 1, ax_chassis);
  85                 proto_tree_add_item(ax4000_tree,
  86                     hf_ax4000_fill, tvb, 2, 1, FALSE);
  87                 proto_tree_add_uint(ax4000_tree,
  88                     hf_ax4000_index, tvb, 2, 2, ax_index);
  89                 proto_tree_add_uint(ax4000_tree,
  90                     hf_ax4000_timestamp, tvb, 6, 4, ax_timestamp);
  91                 proto_tree_add_uint(ax4000_tree,
  92                     hf_ax4000_seq, tvb, 10, 4, ax_seq);
  93                 proto_tree_add_uint(ax4000_tree,
  94                     hf_ax4000_crc, tvb, 14, 2, tvb_get_letohs(tvb, 14));
  95         }
  96
  97 }
  98
  99 /* Register the protocol with Wireshark */
 100
 101 /* this format is require because a script is used to build the C function
 102    that calls all the protocol registration.
 103 */
 104
 105 void
 106 proto_register_ax4000(void)
 107 {
 108         static hf_register_info hf[] = {
 109                 { &hf_ax4000_port,
 110                         { "Port Number", "ax4000.port",
 111                         FT_UINT8, BASE_DEC, NULL, 0x0,
 112                         NULL, HFILL }
 113                 },
 114                 { &hf_ax4000_chassis,
 115                         { "Chassis Number", "ax4000.chassis",
 116                         FT_UINT8, BASE_DEC, NULL, 0x0,
 117                         NULL, HFILL }
 118                 },
 119                 { &hf_ax4000_fill,
 120                         { "Fill Type", "ax4000.fill",
 121                         FT_UINT8, BASE_DEC, NULL, 0xc0,
 122                         NULL, HFILL }
 123                 },
 124                 { &hf_ax4000_index,
 125                         { "Index", "ax4000.index",
 126                         FT_UINT16, BASE_DEC, NULL, 0x0FFF,
 127                         NULL, HFILL }
 128                 },
 129                 { &hf_ax4000_timestamp,
 130                         { "Timestamp", "ax4000.timestamp",
 131                         FT_UINT32, BASE_HEX, NULL, 0x0,
 132                         NULL, HFILL }
 133                 },
 134                 { &hf_ax4000_seq,
 135                         { "Sequence Number", "ax4000.seq",
 136                         FT_UINT32, BASE_HEX, NULL, 0x0,
 137                         NULL, HFILL }
 138                 },
 139                 { &hf_ax4000_crc,
 140                         { "CRC (unchecked)", "ax4000.crc",
 141                         FT_UINT16, BASE_HEX, NULL, 0x0,
 142                         NULL, HFILL }
 143                 }
 144         };
 145
 146         /* Setup protocol subtree array */
 147         static gint *ett[] = {
 148                 &ett_ax4000
 149         };
 150
 151         /* Register the protocol name and description */
 152         proto_ax4000 = proto_register_protocol("AX/4000 Test Block",
 153             "AX4000", "ax4000");
 154
 155         /* Required function calls to register the header fields and subtrees used */
 156         proto_register_field_array(proto_ax4000, hf, array_length(hf));
 157         proto_register_subtree_array(ett, array_length(ett));
 158 }
 159
 160 #define AX4000_TCP_PORT 3357 /* assigned by IANA */
 161 #define AX4000_UDP_PORT 3357 /* assigned by IANA */
 162
 163 void
 164 proto_reg_handoff_ax4000(void)
 165 {
 166         dissector_handle_t ax4000_handle;
 167
 168         ax4000_handle = create_dissector_handle(dissect_ax4000,
 169             proto_ax4000);
 170         dissector_add_uint("ip.proto", IP_PROTO_AX4000, ax4000_handle);
 171         dissector_add_uint("tcp.port", AX4000_TCP_PORT, ax4000_handle);
 172         dissector_add_uint("udp.port", AX4000_UDP_PORT, ax4000_handle);
 173 }