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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  24  *
  25  * LGE Monitor is a trace tool from Nortel.
  26  */
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <glib.h>
  33
  34 #include <epan/packet.h>
  35 #include <epan/prefs.h>
  36
  37
  38 /* Initialize the protocol and registered fields */
  39 static int proto_lge_monitor            = -1;
  40
  41 static int hf_lge_monitor_dir = -1;
  42 static int hf_lge_monitor_prot = -1;
  43 static int hf_lge_monitor_length = -1;
  44
  45 /* Initialize the subtree pointers */
  46 static int ett_lge_monitor = -1;
  47
  48
  49 static guint LGEMonitorUDPPort = 0;
  50 static dissector_handle_t mtp3_handle, m3ua_handle, sccp_handle, sctp_handle;
  51
  52 static const value_string lge_monitor_dir_vals[] = {
  53         { 0x00, "TX(Transmit Message Signaling Unit)" },
  54         { 0x01, "RX(Receive Message Signaling Unit)" },
  55         { 0,    NULL }
  56 };
  57
  58 static const value_string lge_monitor_prot_vals[] = {
  59         { 0x00, "MTP-3(Message Transfer Part 3)" },
  60         { 0x01, "SCCP(Signaling Connection Control Part)"},
  61         { 0x02, "SCTP(Stream Control Transmission Protocol)"},
  62         { 0x03, "M3UA(MTP-3 User Adaptation)"},
  63         { 0,    NULL }
  64 };
  65
  66 #define LGEMON_PROTO_HEADER_LENGTH 12
  67
  68 /* Code to actually dissect the packets */
  69 static void
  70 dissect_lge_monitor(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
  71 {
  72         int offset = 0;
  73         guint32 lge_monitor_proto_id;
  74         tvbuff_t* next_tvb = NULL;
  75
  76 /* Set up structures needed to add the protocol subtree and manage it */
  77         proto_item *ti;
  78         proto_tree *lge_monitor_tree;
  79
  80 /* Make entries in Protocol column and Info column on summary display */
  81         col_set_str(pinfo->cinfo, COL_PROTOCOL, "LGE Monitor");
  82
  83         ti = proto_tree_add_item(tree, proto_lge_monitor, tvb, 0, LGEMON_PROTO_HEADER_LENGTH, ENC_NA);
  84         lge_monitor_tree = proto_item_add_subtree(ti, ett_lge_monitor);
  85
  86         proto_tree_add_text(lge_monitor_tree, tvb, offset, LGEMON_PROTO_HEADER_LENGTH, "LGE Monitor PDU");
  87         proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_dir, tvb, offset, 4, ENC_BIG_ENDIAN);
  88         offset = offset +4;
  89         lge_monitor_proto_id = tvb_get_ntohl(tvb,offset);
  90         proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_prot, tvb, offset, 4, ENC_BIG_ENDIAN);
  91         offset = offset +4;
  92         proto_tree_add_item(lge_monitor_tree, hf_lge_monitor_length, tvb, offset, 4, ENC_BIG_ENDIAN);
  93         offset = offset +4;
  94
  95         next_tvb = tvb_new_subset_remaining(tvb, offset);
  96
  97         switch (lge_monitor_proto_id){
  98         case 0: /* MTP3 */
  99                 call_dissector(mtp3_handle, next_tvb, pinfo, tree);
 100                 break;
 101         case 1: /* SCCP */
 102                 call_dissector(sccp_handle, next_tvb, pinfo, tree);
 103                 break;
 104         case 2: /* SCTP */
 105                 call_dissector(sctp_handle, next_tvb, pinfo, tree);
 106                 return;
 107         case 3: /* M3UA */
 108                 call_dissector(m3ua_handle, next_tvb, pinfo, tree);
 109                 return;
 110         default:
 111                 proto_tree_add_text(lge_monitor_tree, tvb, offset, -1, "LGE Monitor data");
 112                 break;
 113         }
 114         return;
 115 }
 116
 117
 118 void
 119 proto_reg_handoff_lge_monitor(void)
 120 {
 121         static dissector_handle_t lge_monitor_handle;
 122         static guint saved_udp_port;
 123         static gboolean lge_monitor_prefs_initialized = FALSE;
 124
 125         if (!lge_monitor_prefs_initialized) {
 126                 lge_monitor_handle = create_dissector_handle(dissect_lge_monitor, proto_lge_monitor);
 127                 dissector_add_handle("udp.port", lge_monitor_handle);  /* for 'decode-as' */
 128                 mtp3_handle  = find_dissector("mtp3");
 129                 m3ua_handle  = find_dissector("m3ua");
 130                 sccp_handle  = find_dissector("sccp");
 131                 sctp_handle  = find_dissector("sctp");
 132                 lge_monitor_prefs_initialized = TRUE;
 133           }
 134         else {
 135                 if (saved_udp_port != 0) {
 136                         dissector_delete_uint("udp.port", saved_udp_port, lge_monitor_handle);
 137                 }
 138         }
 139
 140         if (LGEMonitorUDPPort != 0) {
 141                 dissector_add_uint("udp.port", LGEMonitorUDPPort, lge_monitor_handle);
 142         }
 143         saved_udp_port = LGEMonitorUDPPort;
 144 }
 145
 146 void
 147 proto_register_lge_monitor(void)
 148 {
 149
 150         module_t *lge_monitor_module;
 151
 152 /* Setup list of header fields  */
 153         static hf_register_info hf[] = {
 154                 { &hf_lge_monitor_dir,
 155                         { "Direction",           "lge_monitor.dir",
 156                         FT_UINT32, BASE_DEC, VALS(lge_monitor_dir_vals), 0x0,
 157                         NULL, HFILL }
 158                 },
 159                 { &hf_lge_monitor_prot,
 160                         { "Protocol Identifier",           "lge_monitor.prot",
 161                         FT_UINT32, BASE_DEC, VALS(lge_monitor_prot_vals), 0x0,
 162                         NULL, HFILL }
 163                 },
 164                 { &hf_lge_monitor_length,
 165                         { "Payload Length",           "lge_monitor.length",
 166                         FT_UINT32, BASE_DEC, NULL, 0x0,
 167                         NULL, HFILL }
 168                 },
 169         };
 170
 171 /* Setup protocol subtree array */
 172         static gint *ett[] = {
 173                 &ett_lge_monitor,
 174         };
 175
 176 /* Register the protocol name and description */
 177         proto_lge_monitor = proto_register_protocol("LGE Monitor","LGE_Monitor", "lge_monitor");
 178
 179 /* Required function calls to register the header fields and subtrees used */
 180         proto_register_field_array(proto_lge_monitor, hf, array_length(hf));
 181         proto_register_subtree_array(ett, array_length(ett));
 182         /* Register a configuration option for port */
 183
 184
 185         lge_monitor_module = prefs_register_protocol(proto_lge_monitor, proto_reg_handoff_lge_monitor);
 186
 187         prefs_register_uint_preference(lge_monitor_module, "udp.port",
 188                                                                    "LGE Monitor UDP Port",
 189                                                                    "Set UDP port for LGE Monitor messages",
 190                                                                    10,
 191                                                                    &LGEMonitorUDPPort);
 192
 193 }
 194
 195