/* packet-wsmp.c * Routines for WAVE Short Message dissection (WSMP) * Copyright 2008, Arada Systems (http://www.aradasystems.com) (email: siva@aradasystems.com) * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * Copied from README.developer * * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include static dissector_handle_t data_handle; /* Initialize the protocol and registered fields */ static int proto_wsmp = -1; static int hf_wsmp_version = -1; static int hf_wsmp_security = -1; static int hf_wsmp_rate = -1; static int hf_wsmp_channel = -1; static int hf_wsmp_txpower = -1; static int hf_wsmp_appclass = -1; static int hf_wsmp_acmlength = -1; static int hf_wsmp_acm = -1; static int hf_wsmp_wsmlength = -1; /* Initialize the subtree pointers */ static gint ett_wsmp = -1; static gint ett_wsmdata = -1; /* Code to actually dissect the packets */ static void dissect_wsmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { /* Set up structures needed to add the protocol subtree and manage it */ proto_item *ti, *wsmdata_item; proto_tree *wsmp_tree, *wsmdata_tree; tvbuff_t *wsmdata_tvb; guint16 acmlength, wsmlength, offset; /* Make entries in Protocol column and Info column on summary display */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "WSMP"); col_set_str(pinfo->cinfo, COL_INFO, "WAVE Short Message Protocol IEEE P1609.3"); if (tree) { /* create display subtree for the protocol */ ti = proto_tree_add_item(tree, proto_wsmp, tvb, 0, -1, ENC_NA); wsmp_tree = proto_item_add_subtree(ti, ett_wsmp); offset = 0; proto_tree_add_item(wsmp_tree, hf_wsmp_version, tvb, offset, 1, ENC_BIG_ENDIAN); offset ++; proto_tree_add_item(wsmp_tree, hf_wsmp_security, tvb, offset, 1, ENC_BIG_ENDIAN); offset ++; proto_tree_add_item(wsmp_tree, hf_wsmp_channel, tvb, offset, 1, ENC_BIG_ENDIAN); offset ++; proto_tree_add_item(wsmp_tree, hf_wsmp_rate, tvb, offset, 1, ENC_BIG_ENDIAN); offset ++; proto_tree_add_item(wsmp_tree, hf_wsmp_txpower, tvb, offset, 1, ENC_BIG_ENDIAN); offset ++; proto_tree_add_item(wsmp_tree, hf_wsmp_appclass, tvb, offset, 1, ENC_BIG_ENDIAN); offset ++; acmlength = tvb_get_guint8(tvb,offset); proto_tree_add_item(wsmp_tree, hf_wsmp_acmlength, tvb, offset, 1, ENC_BIG_ENDIAN); offset ++; proto_tree_add_item(wsmp_tree, hf_wsmp_acm, tvb, offset, acmlength, ENC_ASCII|ENC_NA); offset +=acmlength; wsmlength = tvb_get_letohs( tvb, offset); proto_tree_add_item(wsmp_tree, hf_wsmp_wsmlength, tvb, offset, 2, ENC_LITTLE_ENDIAN); offset += 2; wsmdata_item = proto_tree_add_text (wsmp_tree, tvb, offset, wsmlength, "Wave Short Message"); wsmdata_tree = proto_item_add_subtree(wsmdata_item, ett_wsmdata); /* TODO: Branch on the application context and display accordingly * Default call the data dissector */ wsmdata_tvb = tvb_new_subset(tvb, offset,wsmlength, wsmlength); call_dissector(data_handle, wsmdata_tvb, pinfo, wsmdata_tree); } } /* Register the protocol with Wireshark */ /* this format is require because a script is used to build the C function that calls all the protocol registration. */ void proto_register_wsmp(void) { /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { { &hf_wsmp_version, { "Version", "wsmp.version", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wsmp_security, { "Security", "wsmp.security", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wsmp_channel, { "Channel", "wsmp.channel", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wsmp_rate, { "Rate", "wsmp.rate", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wsmp_txpower, { "Transmit power", "wsmp.txpower", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wsmp_appclass, { "App class", "wsmp.appclass", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wsmp_acmlength, { "Acm Length", "wsmp.acmlength", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wsmp_acm, { "Application Context Data", "wsmp.acm", FT_STRING, BASE_NONE, NULL, 0x0, "Acm", HFILL }}, { &hf_wsmp_wsmlength, { "WSM Length", "wsmp.wsmlength", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_wsmp, &ett_wsmdata, }; /* Register the protocol name and description */ proto_wsmp = proto_register_protocol("Wave Short Message Protocol(IEEE P1609.3)", "WSMP", "wsmp"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_wsmp, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } /* If this dissector uses sub-dissector registration add a registration routine. This exact format is required because a script is used to find these routines and create the code that calls these routines. */ void proto_reg_handoff_wsmp(void) { dissector_handle_t wsmp_handle; wsmp_handle = create_dissector_handle(dissect_wsmp, proto_wsmp); dissector_add_uint("ethertype", ETHERTYPE_WSMP, wsmp_handle); data_handle = find_dissector("data"); return; }