/* packet-isup_thin.c * Routines for ISUP Thin dissection * Copyright 2005, Anders Broman * * $Id$ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * 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. * */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include "prefs.h" static int ISUP_thinTCPPort = 0; static int tcp_port = 0; /* Initialize the protocol and registered fields */ static int proto_isup_thin = -1; /* Initialize the subtree pointers */ static int ett_isup_thin = -1; static int hf_isup_thin_count_type = -1; static int hf_isup_thin_count = -1; static int hf_isup_thin_message_class = -1; static int hf_isup_thin_version = -1; static int hf_isup_thin_message_type = -1; static int hf_isup_thin_serv_ind = -1; static int hf_isup_thin_subservind = -1; static int hf_isup_thin_priority = -1; static int hf_isup_thin_sls = -1; static int hf_isup_thin_opc = -1; static int hf_isup_thin_dpc = -1; static int hf_isup_thin_oam_message_name_code = -1; static int hf_isup_thin_mtp_primitive_message_name_code = -1; static int hf_isup_thin_isup_length = -1; static const value_string isup_thin_count_type_vals[] = { {0, "64 octet count (Not used by t-ISUP)"}, {1, "4 octet count"}, { 0, NULL } }; static const value_string isup_thin_message_type_vals[] = { {0, "OAM Message"}, {1, "MTP Primitive"}, {2, "Encapsulated ISUP Message format according to the used ISUP protocol"}, { 0, NULL } }; static const value_string isup_thin_oam_message_name_code_vals[] = { {1, "Heartbeat"}, { 0, NULL } }; static const value_string isup_thin_mtp_message_name_code_vals[] = { {1, "MTP_Pause"}, {2, "MTP_Resume"}, {3, "MTP_UP_Unavailable"}, {4, "MTP_Cong"}, {6, "MTP_Rest"}, {7, "MTP_Rest_End"}, { 0, NULL } }; dissector_handle_t isup_thin_handle; dissector_handle_t isup_handle; static int dissect_isup_thin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree); /* Code to actually dissect the packets */ static int dissect_isup_thin(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *ti; proto_tree *isup_thin_tree; tvbuff_t *next_tvb; gint offset = 0; gint octet; gint message_type; gint16 isup_message_length; /* Make entries in Protocol column and Info column on summary display */ if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "isup_thin"); /* Find the end line to be able to process the headers * Note that in case of [content-stuff] headers and [content-stuff] is separated by CRLF */ if (tree) { ti = proto_tree_add_item(tree, proto_isup_thin, tvb, 0, -1, FALSE); isup_thin_tree = proto_item_add_subtree(ti, ett_isup_thin); octet = tvb_get_guint8(tvb,offset); proto_tree_add_item(isup_thin_tree, hf_isup_thin_count_type, tvb, offset, 1, FALSE); proto_tree_add_item(isup_thin_tree, hf_isup_thin_count, tvb, offset, 2, FALSE); offset = offset + 2; proto_tree_add_item(isup_thin_tree, hf_isup_thin_message_class, tvb, offset, 1, FALSE); proto_tree_add_item(isup_thin_tree, hf_isup_thin_version, tvb, offset, 2, FALSE); offset++; message_type = tvb_get_guint8(tvb,offset) & 0x7f ; proto_tree_add_item(isup_thin_tree, hf_isup_thin_message_type, tvb, offset, 1, FALSE); offset++; proto_tree_add_item(isup_thin_tree, hf_isup_thin_serv_ind, tvb, offset, 1, FALSE); /* SubServInd */ proto_tree_add_item(isup_thin_tree, hf_isup_thin_subservind, tvb, offset, 1, FALSE); /* Priority */ proto_tree_add_item(isup_thin_tree, hf_isup_thin_priority, tvb, offset, 1, FALSE); offset++; proto_tree_add_item(isup_thin_tree, hf_isup_thin_sls, tvb, offset, 1, FALSE); offset++; proto_tree_add_item(isup_thin_tree, hf_isup_thin_opc, tvb, offset, 3, FALSE); offset = offset +3; proto_tree_add_item(isup_thin_tree, hf_isup_thin_dpc, tvb, offset, 3, FALSE); offset = offset +3; /* 12 Bytes off measage header done */ switch (message_type) { case 0: /* OAM message */ proto_tree_add_item(isup_thin_tree, hf_isup_thin_oam_message_name_code, tvb, offset, 1, FALSE); offset++; break; case 1: /* MTP Primitive */ proto_tree_add_item(isup_thin_tree, hf_isup_thin_mtp_primitive_message_name_code, tvb, offset, 1, FALSE); offset++; break; case 2: /*Encapsulated ISUP Message format according to the used ISUP protocol */ isup_message_length = tvb_get_ntohs(tvb,offset); proto_tree_add_item(isup_thin_tree, hf_isup_thin_isup_length, tvb, offset, 2, FALSE); offset = offset +2; next_tvb = tvb_new_subset(tvb, offset, isup_message_length, isup_message_length); call_dissector(isup_handle, next_tvb, pinfo, tree); break; default: /* Unknown */ return 0; } }/* if tree */ return tvb_length(tvb); /* If this protocol has a sub-dissector call it here, see section 1.8 */ } /* Register the protocol with Ethereal */ /* If this dissector uses sub-dissector registration add a registration routine. This format is required because a script is used to find these routines and create the code that calls these routines. */ void proto_reg_handoff_isup_thin(void) { static int Initialized=FALSE; if (!Initialized) { isup_thin_handle = new_create_dissector_handle(dissect_isup_thin, proto_isup_thin); Initialized=TRUE; }else{ dissector_delete("tcp.port", tcp_port, isup_thin_handle); } tcp_port = ISUP_thinTCPPort; dissector_add("tcp.port", tcp_port, isup_thin_handle); isup_handle = find_dissector("isup"); } void proto_register_isup_thin(void) { /* Setup protocol subtree array */ static gint *ett[] = { &ett_isup_thin, }; /* Setup list of header fields */ static hf_register_info hf[] = { { &hf_isup_thin_count_type, { "Count Type", "isup_thin.count.type", FT_UINT8, BASE_DEC,VALS(isup_thin_count_type_vals), 0x80, "Count Type", HFILL } }, { &hf_isup_thin_count, { "Message length (counted according to bit 0) including the Message Header","isup_thin.count", FT_UINT16, BASE_DEC,NULL, 0x7fff, "Message length", HFILL } }, { &hf_isup_thin_message_class, { "Message Class","isup_thin.message.class", FT_UINT8, BASE_DEC,NULL, 0xfc, "Message Class", HFILL } }, { &hf_isup_thin_version, { "Version","isup_thin.count.version", FT_UINT16, BASE_DEC,NULL, 0x0380, "Version", HFILL } }, { &hf_isup_thin_message_type, { "Message Type", "isup_thin.messaget.type", FT_UINT8, BASE_DEC,VALS(isup_thin_message_type_vals), 0x7f, "Message Type", HFILL } }, { &hf_isup_thin_serv_ind, { "Service Indicator","isup_thin.servind", FT_UINT8, BASE_DEC,NULL, 0xf0, "Service Indicator", HFILL } }, { &hf_isup_thin_subservind, { "Sub Service Field (Network Indicator)","isup_thin.subservind", FT_UINT8, BASE_DEC,NULL, 0x0c, "Sub Service Field (Network Indicator)", HFILL } }, { &hf_isup_thin_priority, { "Priority","isup_thin.priority", FT_UINT8, BASE_DEC,NULL, 0x03, "Priority", HFILL } }, { &hf_isup_thin_sls, { "Signalling Link Selection","isup_thin.sls", FT_UINT8, BASE_DEC,NULL, 0x0, "Signalling Link Selection", HFILL } }, { &hf_isup_thin_opc, { "Originating Point Code","isup_thin.opc", FT_UINT32, BASE_DEC,NULL, 0x0, "Originating Point Code", HFILL } }, { &hf_isup_thin_dpc, { "Destination Point Code","isup_thin.dpc", FT_UINT32, BASE_DEC,NULL, 0x0, "Destination Point Code", HFILL } }, { &hf_isup_thin_oam_message_name_code, { "Message Name Code","isup_thin.oam.message.name", FT_UINT8, BASE_DEC,VALS(isup_thin_oam_message_name_code_vals), 0x0, "Message Name", HFILL } }, { &hf_isup_thin_mtp_primitive_message_name_code, { "Message Name Code","isup_thin.mtp.message.name", FT_UINT8, BASE_DEC,VALS(isup_thin_mtp_message_name_code_vals), 0x0, "Message Name", HFILL } }, { &hf_isup_thin_isup_length, { "ISUP message length","isup_thin.isup.message.length", FT_UINT16, BASE_DEC, NULL, 0x0, "ISUP message length", HFILL } }, }; module_t *isup_thin_module; /* Register the protocol name and description */ proto_isup_thin = proto_register_protocol("ISUP Thin Protocol","isup_thin", "isup_thin"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_isup_thin, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); isup_thin_module = prefs_register_protocol(proto_isup_thin, NULL); prefs_register_uint_preference(isup_thin_module, "tcp.port", "ISUP Thin TCP Port", "Set TCP port for ISUP Thin messages", 10, &ISUP_thinTCPPort); /* * Register the dissector by name, so other dissectors can * grab it by name rather than just referring to it directly. */ new_register_dissector("isup_thin", dissect_isup_thin, proto_isup_thin); }