/* packet-sm.c * Routines for Cisco Session Management Protocol dissection * Copyright 2004, Duncan Sargeant * * $Id$ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * Copied from WHATEVER_FILE_YOU_USED (where "WHATEVER_FILE_YOU_USED" * is a dissector file; if you just copied this from README.developer, * don't bother with the "Copied from" - you don't even need to put * in a "Copied from" if you copied an existing dissector, especially * if the bulk of the code in the new dissector is your code) * * 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 2 * 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, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* * This is basically a glue dissector for the Cisco SM protocol. It sits * between the RUDP and MTP3 layers in conversations on port 7000 between * SLTs and MGCs. A link to an overview of the technology : * * http://www.cisco.com/en/US/products/sw/netmgtsw/ps4883/products_installation_and_configuration_guide_chapter09186a008010950a.html * * Link showing debugs of the protocol: * http://www.cisco.com/univercd/cc/td/doc/product/access/sc/rel7/omts/omts_apb.htm#30052 * * I'm unable to get local debugs of this protocol, as the SLT's are * slow cpu cisco 2600's, and they tend to drop the signalling links * if you turn any debugging on! But there's not much interesting * here, its just glue to get the ISUP/MTP3 data nicely. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #ifdef NEED_SNPRINTF_H # include "snprintf.h" #endif #include #include #include "plugins/plugin_api.h" #include "plugins/plugin_api_defs.h" /* Define version if we are not building ethereal statically */ #include "moduleinfo.h" #ifndef ENABLE_STATIC G_MODULE_EXPORT const gchar version[] = VERSION; #endif /* Initialize the protocol and registered fields */ static int proto_sm = -1; static int hf_sm_sm_msg_type = -1; static int hf_sm_protocol = -1; static int hf_sm_msg_id = -1; static int hf_sm_msg_type = -1; static int hf_sm_channel = -1; static int hf_sm_bearer = -1; static int hf_sm_len = -1; /* Initialize the subtree pointers */ static gint ett_sm = -1; /* Code to actually dissect the packets */ static void dissect_sm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *ti; proto_tree *sm_tree; tvbuff_t *next_tvb = NULL; if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "SM"); if (check_col(pinfo->cinfo, COL_INFO)) col_set_str(pinfo->cinfo, COL_INFO, "Cisco SM Packet"); if (tree) { ti = proto_tree_add_item(tree, proto_sm, tvb, 0, 16, FALSE); sm_tree = proto_item_add_subtree(ti, ett_sm); ti = proto_tree_add_item(sm_tree, hf_sm_sm_msg_type, tvb, 0, 4, FALSE); ti = proto_tree_add_item(sm_tree, hf_sm_protocol, tvb, 4, 2, FALSE); ti = proto_tree_add_item(sm_tree, hf_sm_msg_id, tvb, 6, 2, FALSE); ti = proto_tree_add_item(sm_tree, hf_sm_msg_type, tvb, 8, 2, FALSE); ti = proto_tree_add_item(sm_tree, hf_sm_channel, tvb, 10, 2, FALSE); ti = proto_tree_add_item(sm_tree, hf_sm_bearer, tvb, 12, 2, FALSE); ti = proto_tree_add_item(sm_tree, hf_sm_len, tvb, 14, 2, FALSE); } next_tvb = tvb_new_subset(tvb, 16, -1, -1); if (tvb_length(next_tvb) && find_dissector("mtp3")) call_dissector(find_dissector("mtp3"), next_tvb, pinfo, tree); } void proto_register_sm(void) { static hf_register_info hf[] = { { &hf_sm_sm_msg_type, { "SM Message Type", "sm.sm_msg_type", FT_UINT32, BASE_HEX, NULL, 0x0, "", HFILL } }, { &hf_sm_protocol, { "Protocol Type", "sm.protocol", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL } }, { &hf_sm_msg_id, { "Message ID", "sm.msgid", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL } }, { &hf_sm_msg_type, { "Message Type", "sm.msg_type", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL } }, { &hf_sm_channel, { "Channel ID", "sm.channel", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL } }, { &hf_sm_bearer, { "Bearer ID", "sm.bearer", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL } }, { &hf_sm_len, { "Length", "sm.len", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL } }, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_sm, }; /* Register the protocol name and description */ proto_sm = proto_register_protocol("Cisco Session Management", "SM", "sm"); register_dissector("sm", dissect_sm, proto_sm); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_sm, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void plugin_reg_handoff_sm(void) { return; } #ifndef ENABLE_STATIC G_MODULE_EXPORT void plugin_init(plugin_address_table_t *pat #ifndef PLUGINS_NEED_ADDRESS_TABLE _U_ #endif ) { /* initialise the table of pointers needed in Win32 DLLs */ plugin_address_table_init(pat); /* register the new protocol, protocol fields, and subtrees */ if (proto_sm == -1) { /* execute protocol initialization only once */ proto_register_sm(); } } G_MODULE_EXPORT void plugin_reg_handoff(void) { plugin_reg_handoff_sm(); } #endif