epan/dissectors/packet-lge_monitor.c

   1 /* packet-lge_monitor.c
   2  * Routines for LGE Monitor packet dissection
   3  * Copyright 2006, Anders Broman <anders.broman[at]ericsson.com>
   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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  24  *
  25  * LGE Monitor is a trace tool from Nortel.
  26  */
  27
  28 #include "config.h"
  29
  30 #include <glib.h>
  31
  32 #include <epan/packet.h>
  33 #include <epan/prefs.h>
  34
  35
  36 /* Initialize the protocol and registered fields */
  37 static int proto_lge_monitor            = -1;
  38
  39 static int hf_lge_monitor_dir = -1;
  40 static int hf_lge_monitor_prot = -1;
  41 static int hf_lge_monitor_length = -1;
  42
  43 /* Initialize the subtree pointers */
  44 static int ett_lge_monitor = -1;
  45
  46
  47 static guint LGEMonitorUDPPort = 0;
  48 static dissector_handle_t mtp3_handle, m3ua_handle, sccp_handle, sctp_handle;
  49
  50 static const value_string lge_monitor_dir_vals[] = {
  51         { 0x00, "TX(Transmit Message Signaling Unit)" },
  52         { 0x01, "RX(Receive Message Signaling Unit)" },
  53         { 0,    NULL }
  54 };
  55
  56 static const value_string lge_monitor_prot_vals[] = {
  57         { 0x00, "MTP-3(Message Transfer Part 3)" },
  58         { 0x01, "SCCP(Signaling Connection Control Part)"},
  59         { 0x02, "SCTP(Stream Control Transmission Protocol)"},
  60         { 0x03, "M3UA(MTP-3 User Adaptation)"},
  61         { 0,    NULL }
  62 };
  63
  64 #define LGEMON_PROTO_HEADER_LENGTH 12
  65
  66 /* Code to actually dissect the packets */
  67 static void
  68 dissect_lge_monitor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  69 {
  70         int offset = 0;
  71         guint32 lge_monitor_proto_id;
  72         tvbuff_t* next_tvb = NULL;
  73
  74 /* Set up structures needed to add the protocol subtree and manage it */
  75         proto_item *ti;
  76         proto_tree *lge_monitor_tree;
  77
  78 /* Make entries in Protocol column and Info column on summary display */
  79         col_set_str(pinfo->cinfo, COL_PROTOCOL, "LGE Monitor");
  80
  81         ti = proto_tree_add_item(tree, proto_lge_monitor, tvb, 0, LGEMON_PROTO_HEADER_LENGTH, ENC_NA);
  82         lge_monitor_tree = proto_item_add_subtree(ti, ett_lge_monitor);
  83
  84         proto_tree_add_text(lge_monitor_tree, tvb, offset, LGEMON_PROTO_HEADER_LENGTH, "LGE Monitor PDU");
  85         proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_dir, tvb, offset, 4, ENC_BIG_ENDIAN);
  86         offset = offset +4;
  87         lge_monitor_proto_id = tvb_get_ntohl(tvb,offset);
  88         proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_prot, tvb, offset, 4, ENC_BIG_ENDIAN);
  89         offset = offset +4;
  90         proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_length, tvb, offset, 4, ENC_BIG_ENDIAN);
  91         offset = offset +4;
  92
  93         next_tvb = tvb_new_subset_remaining(tvb, offset);
  94
  95         switch (lge_monitor_proto_id){
  96         case 0: /* MTP3 */
  97                 call_dissector(mtp3_handle, next_tvb, pinfo, tree);
  98                 break;
  99         case 1: /* SCCP */
 100                 call_dissector(sccp_handle, next_tvb, pinfo, tree);
 101                 break;
 102         case 2: /* SCTP */
 103                 call_dissector(sctp_handle, next_tvb, pinfo, tree);
 104                 return;
 105         case 3: /* M3UA */
 106                 call_dissector(m3ua_handle, next_tvb, pinfo, tree);
 107                 return;
 108         default:
 109                 proto_tree_add_text(lge_monitor_tree, tvb, offset, -1, "LGE Monitor data");
 110                 break;
 111         }
 112         return;
 113 }
 114
 115
 116 void
 117 proto_reg_handoff_lge_monitor(void)
 118 {
 119         static dissector_handle_t lge_monitor_handle;
 120         static guint saved_udp_port;
 121         static gboolean lge_monitor_prefs_initialized = FALSE;
 122
 123         if (!lge_monitor_prefs_initialized) {
 124                 lge_monitor_handle = create_dissector_handle(dissect_lge_monitor, proto_lge_monitor);
 125                 dissector_add_handle("udp.port", lge_monitor_handle);  /* for 'decode-as' */
 126                 mtp3_handle  = find_dissector("mtp3");
 127                 m3ua_handle  = find_dissector("m3ua");
 128                 sccp_handle  = find_dissector("sccp");
 129                 sctp_handle  = find_dissector("sctp");
 130                 lge_monitor_prefs_initialized = TRUE;
 131           }
 132         else {
 133                 if (saved_udp_port != 0) {
 134                         dissector_delete_uint("udp.port", saved_udp_port, lge_monitor_handle);
 135                 }
 136         }
 137
 138         if (LGEMonitorUDPPort != 0) {
 139                 dissector_add_uint("udp.port", LGEMonitorUDPPort, lge_monitor_handle);
 140         }
 141         saved_udp_port = LGEMonitorUDPPort;
 142 }
 143
 144 void
 145 proto_register_lge_monitor(void)
 146 {
 147
 148         module_t *lge_monitor_module;
 149
 150 /* Setup list of header fields  */
 151         static hf_register_info hf[] = {
 152                 { &hf_lge_monitor_dir,
 153                         { "Direction",           "lge_monitor.dir",
 154                         FT_UINT32, BASE_DEC, VALS(lge_monitor_dir_vals), 0x0,
 155                         NULL, HFILL }
 156                 },
 157                 { &hf_lge_monitor_prot,
 158                         { "Protocol Identifier",           "lge_monitor.prot",
 159                         FT_UINT32, BASE_DEC, VALS(lge_monitor_prot_vals), 0x0,
 160                         NULL, HFILL }
 161                 },
 162                 { &hf_lge_monitor_length,
 163                         { "Payload Length",           "lge_monitor.length",
 164                         FT_UINT32, BASE_DEC, NULL, 0x0,
 165                         NULL, HFILL }
 166                 },
 167         };
 168
 169 /* Setup protocol subtree array */
 170         static gint *ett[] = {
 171                 &ett_lge_monitor,
 172         };
 173
 174 /* Register the protocol name and description */
 175         proto_lge_monitor = proto_register_protocol("LGE Monitor","LGE_Monitor", "lge_monitor");
 176
 177 /* Required function calls to register the header fields and subtrees used */
 178         proto_register_field_array(proto_lge_monitor, hf, array_length(hf));
 179         proto_register_subtree_array(ett, array_length(ett));
 180         /* Register a configuration option for port */
 181
 182
 183         lge_monitor_module = prefs_register_protocol(proto_lge_monitor, proto_reg_handoff_lge_monitor);
 184
 185         prefs_register_uint_preference(lge_monitor_module, "udp.port",
 186                                                                    "LGE Monitor UDP Port",
 187                                                                    "Set UDP port for LGE Monitor messages",
 188                                                                    10,
 189                                                                    &LGEMonitorUDPPort);
 190
 191 }
 192
 193