2001-01-22 09:04:09 +00:00
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/* packet-sual.c
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* Routines for SUA light, a Siemens propriatary protocol
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*
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* Copyright 2001, Martin Held <Martin.Held@icn.siemens.de>
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2001-04-23 18:05:19 +00:00
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* Michael T<EFBFBD>xen <Michael.Tuexen@icn.siemens.de>
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2001-01-22 09:04:09 +00:00
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*
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2001-04-25 05:32:16 +00:00
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* $Id: packet-sual.c,v 1.5 2001/04/25 05:32:16 guy Exp $
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2001-01-22 09:04:09 +00:00
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*
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* Ethereal - Network traffic analyzer
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2001-04-20 20:34:31 +00:00
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* By Gerald Combs <gerald@ethereal.com>
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2001-01-22 09:04:09 +00:00
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* Copyright 1998 Gerald Combs
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*
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* Copied from README.developer
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <string.h>
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#include <glib.h>
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#ifdef NEED_SNPRINTF_H
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# include "snprintf.h"
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#endif
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#include "packet.h"
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#define SUAL_PAYLOAD_PROTO_ID 4
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#define VERSION_LENGTH 1
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#define SPARE_1_LENGTH 1
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#define MESSAGE_TYPE_LENGTH 2
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#define SUBSYSTEM_NUMBER_LENGTH 2
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#define SPARE_2_LENGTH 2
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#define MESSAGE_LENGTH_LENGTH 4
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#define COMMON_HEADER_LENGTH (VERSION_LENGTH + SPARE_1_LENGTH + MESSAGE_TYPE_LENGTH + \
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SUBSYSTEM_NUMBER_LENGTH + SPARE_2_LENGTH + MESSAGE_LENGTH_LENGTH)
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#define VERSION_OFFSET 0
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#define SPARE_1_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
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#define MESSAGE_TYPE_OFFSET (SPARE_1_OFFSET + SPARE_1_LENGTH)
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#define SUBSYSTEM_NUMBER_OFFSET (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
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#define SPARE_2_OFFSET (SUBSYSTEM_NUMBER_OFFSET + SUBSYSTEM_NUMBER_LENGTH)
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#define MESSAGE_LENGTH_OFFSET (SPARE_2_OFFSET + SPARE_2_LENGTH)
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/* SUAL message type coding */
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#define SUAL_MSG_CLDT 0x0501
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#define SUAL_MSG_CORE 0x0701
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#define SUAL_MSG_COAK_CC 0x0702
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#define SUAL_MSG_COAK_CREF 0x0712
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#define SUAL_MSG_RELRE 0x0703
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#define SUAL_MSG_RELCO 0x0704
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#define SUAL_MSG_CODT 0x0707
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#define SUAL_MSG_ERR 0x0000
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static const value_string sual_message_type_values[] = {
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{ SUAL_MSG_CLDT, "Connectionless Data Transfer (CLDT)"},
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{ SUAL_MSG_CORE, "Connection Request (CORE)"},
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{ SUAL_MSG_COAK_CC, "Connection Acknowledge (COAK_CC)"},
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{ SUAL_MSG_COAK_CREF, "Connection Acknowledge (COAK_CREF)"},
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{ SUAL_MSG_RELRE, "Release Request (RELRE)"},
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{ SUAL_MSG_RELCO, "Release Complete (RELCO)"},
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{ SUAL_MSG_CODT, "Connection Oriented Data Transfer (CODT)"},
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{ SUAL_MSG_ERR, "Error (ERR)"},
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{ 0, NULL}};
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static const value_string sual_message_type_acro_values[] = {
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{ SUAL_MSG_CLDT, "CLDT"},
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{ SUAL_MSG_CORE, "CORE"},
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{ SUAL_MSG_COAK_CC, "COAK_CC"},
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{ SUAL_MSG_COAK_CREF, "COAK_CREF"},
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{ SUAL_MSG_RELRE, "RELRE"},
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{ SUAL_MSG_RELCO, "RELCO"},
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{ SUAL_MSG_CODT, "CODT"},
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{ SUAL_MSG_ERR, "ERR"},
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{ 0, NULL}};
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2001-04-24 19:18:03 +00:00
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/* SUAL Error Codes */
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#define SUAL_ERR_INVVERS 0x0001
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#define SUAL_ERR_INVSTRID 0x0005
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#define SUAL_ERR_INVMSGTYP 0x0006
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static const value_string sual_error_code_values[] = {
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{ SUAL_ERR_INVVERS, "Invalid Protocol Version"},
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{ SUAL_ERR_INVSTRID, "Invalid Stream Identifier"},
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{ SUAL_ERR_INVMSGTYP, "Invalid Message Type"},
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{ 0, NULL}};
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2001-01-22 09:04:09 +00:00
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/* Initialize the protocol and registered fields */
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static int proto_sual = -1;
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static int hf_sual_version = -1;
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static int hf_sual_spare_1 = -1;
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static int hf_sual_message_type = -1;
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static int hf_sual_subsystem_number = -1;
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static int hf_sual_spare_2 = -1;
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static int hf_sual_message_length = -1;
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2001-04-24 19:18:03 +00:00
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static int hf_sual_error_code = -1;
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2001-01-22 09:04:09 +00:00
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/* Initialize the subtree pointers */
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static gint ett_sual = -1;
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2001-04-24 19:18:03 +00:00
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static dissector_table_t sual_dissector_table;
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2001-01-22 09:04:09 +00:00
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static void
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2001-04-24 19:18:03 +00:00
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dissect_sual_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo,
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proto_tree *sual_tree, guint16 *subsystem_number)
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2001-01-22 09:04:09 +00:00
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{
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guint8 version, spare_1;
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2001-04-24 19:18:03 +00:00
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guint16 message_type, spare_2;
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2001-01-22 09:04:09 +00:00
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guint32 message_length;
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/* Extract the common header */
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2001-04-24 19:18:03 +00:00
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version = tvb_get_guint8(common_header_tvb, VERSION_OFFSET);
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spare_1 = tvb_get_guint8(common_header_tvb, SPARE_1_OFFSET);
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message_type = tvb_get_ntohs(common_header_tvb, MESSAGE_TYPE_OFFSET);
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*subsystem_number = tvb_get_ntohs(common_header_tvb, SUBSYSTEM_NUMBER_OFFSET);
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spare_2 = tvb_get_ntohs(common_header_tvb, SPARE_2_OFFSET);
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message_length = tvb_get_ntohl (common_header_tvb, MESSAGE_LENGTH_OFFSET);
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2001-01-22 09:04:09 +00:00
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if (check_col(pinfo->fd, COL_INFO)) {
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col_append_str(pinfo->fd, COL_INFO, val_to_str(message_type, sual_message_type_acro_values, "Unknown"));
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col_append_str(pinfo->fd, COL_INFO, " ");
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};
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if (sual_tree) {
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/* add the components of the common header to the protocol tree */
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proto_tree_add_uint(sual_tree, hf_sual_version,
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common_header_tvb, VERSION_OFFSET, VERSION_LENGTH,
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version);
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proto_tree_add_uint(sual_tree, hf_sual_spare_1,
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common_header_tvb, SPARE_1_OFFSET, SPARE_1_LENGTH,
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spare_1);
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proto_tree_add_uint_format(sual_tree, hf_sual_message_type,
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common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH,
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message_type, "Message type: %u (%s)",
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message_type, val_to_str(message_type, sual_message_type_values, "Unknown"));
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proto_tree_add_uint(sual_tree, hf_sual_subsystem_number,
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common_header_tvb, SUBSYSTEM_NUMBER_OFFSET, SUBSYSTEM_NUMBER_LENGTH,
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2001-04-24 19:18:03 +00:00
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*subsystem_number);
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2001-01-22 09:04:09 +00:00
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proto_tree_add_uint(sual_tree, hf_sual_spare_2,
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common_header_tvb, SPARE_2_OFFSET, SPARE_2_LENGTH,
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spare_2);
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proto_tree_add_uint(sual_tree, hf_sual_message_length,
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common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH,
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message_length);
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};
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}
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static void
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2001-04-24 19:18:03 +00:00
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dissect_payload(tvbuff_t *payload_tvb, packet_info *pinfo,
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guint16 subsystem_number, proto_tree *sual_tree, proto_tree *tree)
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{
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guint payload_length = tvb_length(payload_tvb);
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/* do lookup with the subdissector table */
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if ( ! dissector_try_port (sual_dissector_table, subsystem_number, payload_tvb,
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pinfo, tree))
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{
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if (sual_tree) {
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proto_tree_add_text(sual_tree, payload_tvb, 0, payload_length,
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"Payload: %u byte%s",
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payload_length,
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plurality(payload_length, "", "s"));
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}
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}
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}
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static void
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dissect_error_payload(tvbuff_t *payload_tvb, proto_tree *sual_tree)
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{
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if (sual_tree)
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{
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proto_tree_add_item(sual_tree, hf_sual_error_code, payload_tvb, 0, 2, FALSE);
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}
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}
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static void
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dissect_sual_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *sual_tree, proto_tree *tree)
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2001-01-22 09:04:09 +00:00
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{
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2001-04-24 19:18:03 +00:00
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gint offset, payload_length;
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guint16 subsystem_number;
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guint16 message_type;
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2001-01-22 09:04:09 +00:00
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tvbuff_t *common_header_tvb;
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2001-04-24 19:18:03 +00:00
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tvbuff_t *payload_tvb;
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2001-01-22 09:04:09 +00:00
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offset = 0;
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/* extract and process the common header */
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common_header_tvb = tvb_new_subset(message_tvb, offset, COMMON_HEADER_LENGTH, COMMON_HEADER_LENGTH);
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2001-04-24 19:18:03 +00:00
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message_type = tvb_get_ntohs(common_header_tvb, MESSAGE_TYPE_OFFSET);
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dissect_sual_common_header(common_header_tvb, pinfo, sual_tree, &subsystem_number);
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2001-01-22 09:04:09 +00:00
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offset += COMMON_HEADER_LENGTH;
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2001-04-24 19:18:03 +00:00
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payload_length = tvb_length(message_tvb) - COMMON_HEADER_LENGTH;
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if (payload_length != 0)
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{
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payload_tvb = tvb_new_subset(message_tvb, offset, payload_length, payload_length);
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if (message_type != SUAL_MSG_ERR)
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{
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dissect_payload(payload_tvb, pinfo, subsystem_number, sual_tree, tree);
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}
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else
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{
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dissect_error_payload(payload_tvb, sual_tree);
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}
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2001-01-22 09:04:09 +00:00
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}
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2001-04-24 19:18:03 +00:00
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2001-01-22 09:04:09 +00:00
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}
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static void
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dissect_sual(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
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{
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proto_item *sual_item;
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proto_tree *sual_tree;
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/* make entry in the Protocol column on summary display */
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "SUAL");
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/* In the interest of speed, if "tree" is NULL, don't do any work not
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necessary to generate protocol tree items. */
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if (tree) {
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/* create the sual protocol tree */
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sual_item = proto_tree_add_item(tree, proto_sual, message_tvb, 0, tvb_length(message_tvb), FALSE);
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sual_tree = proto_item_add_subtree(sual_item, ett_sual);
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} else {
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sual_tree = NULL;
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};
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/* dissect the message */
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2001-04-24 19:18:03 +00:00
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dissect_sual_message(message_tvb, pinfo, sual_tree, tree);
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2001-01-22 09:04:09 +00:00
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}
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/* Register the protocol with Ethereal */
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void
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proto_register_sual(void)
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{
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/* Setup list of header fields */
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static hf_register_info hf[] = {
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{ &hf_sual_version,
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{ "Version", "sual.version",
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FT_UINT8, BASE_DEC, NULL, 0x0,
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""}
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},
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{ &hf_sual_spare_1,
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{ "Spare", "sual.spare_1",
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FT_UINT8, BASE_HEX, NULL, 0x0,
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""}
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|
|
|
|
},
|
|
|
|
|
{ &hf_sual_message_type,
|
|
|
|
|
{ "Message Type", "sual.message_type",
|
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
|
|
|
""}
|
|
|
|
|
},
|
|
|
|
|
{ &hf_sual_subsystem_number,
|
|
|
|
|
{ "Subsystem number", "sual.subsystem_number",
|
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
|
|
|
""}
|
|
|
|
|
},
|
|
|
|
|
{ &hf_sual_spare_2,
|
|
|
|
|
{ "Spare", "sual.spare_2",
|
|
|
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
|
|
|
""}
|
|
|
|
|
},
|
|
|
|
|
{ &hf_sual_message_length,
|
|
|
|
|
{ "Message length", "sual.message_length",
|
|
|
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
|
|
|
""}
|
2001-04-24 19:18:03 +00:00
|
|
|
|
},
|
|
|
|
|
{ &hf_sual_error_code,
|
|
|
|
|
{ "Error Code", "sual.error_code",
|
2001-04-25 05:32:16 +00:00
|
|
|
|
FT_UINT16, BASE_HEX, VALS(&sual_error_code_values), 0x0,
|
2001-04-24 19:18:03 +00:00
|
|
|
|
""}
|
|
|
|
|
}
|
2001-01-22 09:04:09 +00:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
|
static gint *ett[] = {
|
|
|
|
|
&ett_sual,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Register the protocol name and description */
|
|
|
|
|
proto_sual = proto_register_protocol("SCCP user adaptation layer light",
|
|
|
|
|
"SUAL", "sual");
|
|
|
|
|
|
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
|
proto_register_field_array(proto_sual, hf, array_length(hf));
|
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
2001-04-24 19:18:03 +00:00
|
|
|
|
|
|
|
|
|
/* subdissector code */
|
|
|
|
|
sual_dissector_table = register_dissector_table("sual.subsystem_number");
|
|
|
|
|
|
2001-01-22 09:04:09 +00:00
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
proto_reg_handoff_sual(void)
|
|
|
|
|
{
|
|
|
|
|
dissector_add("sctp.ppi", SUAL_PAYLOAD_PROTO_ID, dissect_sual, proto_sual);
|
|
|
|
|
}
|