2001-05-24 08:13:56 +00:00
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/* packet-mtp3.c
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* Routines for Message Transfer Part Level 3 dissection
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* Copyright 2001, Michael Tuexen <Michael.Tuexen@icn.siemens.de>
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*
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2001-07-07 09:06:40 +00:00
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* $Id: packet-mtp3.c,v 1.5 2001/07/07 09:06:40 guy Exp $
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2001-05-24 08:13:56 +00:00
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*
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* Ethereal - Network traffic analyzer
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2001-05-25 16:19:31 +00:00
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* By Gerald Combs <gerald@ethereal.com>
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2001-05-24 08:13:56 +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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2001-07-07 09:06:40 +00:00
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*
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2001-05-24 08:13:56 +00:00
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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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2001-07-07 09:06:40 +00:00
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*
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2001-05-24 08:13:56 +00:00
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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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2001-07-07 09:06:40 +00:00
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*
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2001-05-24 08:13:56 +00:00
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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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#include <string.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 <glib.h>
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#include "packet.h"
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#include "prefs.h"
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/* Initialize the protocol and registered fields */
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static int proto_mtp3 = -1;
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static module_t *mtp3_module;
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static int hf_mtp3_service_indicator = -1;
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static int hf_mtp3_network_indicator = -1;
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2001-07-07 09:06:40 +00:00
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static int hf_mtp3_itu_spare = -1;
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static int hf_mtp3_ansi_priority = -1;
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static int hf_mtp3_itu_opc = -1;
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static int hf_mtp3_opc_network = -1;
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static int hf_mtp3_opc_cluster = -1;
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static int hf_mtp3_opc_member = -1;
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static int hf_mtp3_itu_dpc = -1;
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static int hf_mtp3_dpc_network = -1;
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static int hf_mtp3_dpc_cluster = -1;
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static int hf_mtp3_dpc_member = -1;
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static int hf_mtp3_itu_sls = -1;
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static int hf_mtp3_ansi_sls = -1;
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2001-05-24 08:13:56 +00:00
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/* Initialize the subtree pointers */
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static gint ett_mtp3 = -1;
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static gint ett_mtp3_sio = -1;
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static gint ett_mtp3_label = -1;
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2001-07-07 09:06:40 +00:00
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static gint ett_mtp3_label_dpc = -1;
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static gint ett_mtp3_label_opc = -1;
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2001-05-24 08:13:56 +00:00
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static dissector_table_t mtp3_sio_dissector_table;
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#define ITU_STANDARD 1
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#define ANSI_STANDARD 2
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static gint mtp3_standard = ITU_STANDARD;
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2001-07-07 09:06:40 +00:00
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#define SIO_OFFSET 0
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#define SIO_LENGTH 1
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2001-05-24 08:13:56 +00:00
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#define ITU_ROUTING_LABEL_OFFSET 1
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#define ITU_ROUTING_LABEL_LENGTH 4
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2001-07-07 09:06:40 +00:00
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#define ITU_SLS_OFFSET 1
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#define ITU_SLS_LENGTH 1
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2001-05-24 08:13:56 +00:00
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#define ITU_MTP_PAYLOAD_OFFSET 5
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2001-07-07 09:06:40 +00:00
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#define ANSI_ROUTING_LABEL_OFFSET 1
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#define ANSI_ROUTING_LABEL_LENGTH 7
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#define ANSI_MTP_PAYLOAD_OFFSET 8
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#define ANSI_DPC_OFFSET 1
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#define ANSI_DPC_LENGTH 3
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#define ANSI_OPC_OFFSET 4
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#define ANSI_OPC_LENGTH 3
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#define ANSI_SLS_OFFSET 7
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#define ANSI_SLS_LENGTH 1
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#define ANSI_NCM_LENGTH 3
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#define ANSI_DPC_OFFSET 1
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#define ANSI_OPC_OFFSET 4
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2001-05-24 08:13:56 +00:00
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#define SERVICE_INDICATOR_MASK 0x0F
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#define SPARE_MASK 0x30
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2001-07-07 09:06:40 +00:00
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#define ANSI_PRIORITY_MASK SPARE_MASK
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2001-05-24 08:13:56 +00:00
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#define NETWORK_INDICATOR_MASK 0xC0
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2001-07-07 09:06:40 +00:00
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#define ITU_DPC_MASK 0x00003FFF
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#define ITU_OPC_MASK 0x0FFFC000
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#define ITU_SLS_MASK 0xF0000000
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#define ANSI_NETWORK_MASK 0x0000FF
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#define ANSI_CLUSTER_MASK 0x00FF00
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#define ANSI_MEMBER_MASK 0xFF0000
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#define ANSI_5BIT_SLS_MASK 0x1F
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/* TODO: eventually add support for ANSI 8-bit SLS */
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#define ANSI_8BIT_SLS_MASK 0xFF
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2001-05-24 08:13:56 +00:00
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static const value_string service_indicator_code_vals[] = {
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2001-07-07 09:06:40 +00:00
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{ 0x0, "Signalling Network Management Message (SNM)" },
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{ 0x1, "Maintenance Regular Message (MTN)" },
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{ 0x2, "Maintenance Special Message (MTNS)" },
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2001-05-24 08:13:56 +00:00
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{ 0x3, "SCCP" },
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{ 0x4, "TUP" },
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{ 0x5, "ISUP" },
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{ 0x6, "DUP (call and circuit related messages)" },
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{ 0x7, "DUP (facility registration and cancellation message)" },
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{ 0x8, "MTP testing user part" },
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{ 0x9, "Spare" },
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{ 0xa, "Spare" },
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{ 0xb, "Spare" },
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{ 0xc, "Spare" },
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{ 0xd, "Spare" },
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{ 0xe, "Spare" },
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{ 0xf, "Spare" },
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{ 0, NULL }
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};
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static const value_string network_indicator_vals[] = {
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{ 0x0, "International network" },
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{ 0x1, "Spare (for international use only)" },
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{ 0x2, "National network" },
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{ 0x3, "Reserved for national use" },
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{ 0, NULL }
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};
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static void
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dissect_mtp3_sio(tvbuff_t *tvb, proto_tree *mtp3_tree)
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{
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guint8 sio;
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proto_item *sio_item;
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proto_tree *sio_tree;
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2001-07-07 09:06:40 +00:00
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sio_item = proto_tree_add_text(mtp3_tree, tvb, SIO_OFFSET, SIO_LENGTH, "Service information octet");
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2001-05-24 08:13:56 +00:00
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sio_tree = proto_item_add_subtree(sio_item, ett_mtp3_sio);
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2001-07-07 09:06:40 +00:00
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sio = tvb_get_guint8(tvb, SIO_OFFSET);
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2001-05-24 08:13:56 +00:00
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proto_tree_add_uint(sio_tree, hf_mtp3_network_indicator,
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2001-07-07 09:06:40 +00:00
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tvb, SIO_OFFSET, SIO_LENGTH,
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2001-05-24 08:13:56 +00:00
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sio);
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2001-07-07 09:06:40 +00:00
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if (mtp3_standard == ANSI_STANDARD)
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proto_tree_add_uint(sio_tree, hf_mtp3_ansi_priority,
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tvb, SIO_OFFSET, SIO_LENGTH,
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sio);
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else
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proto_tree_add_uint(sio_tree, hf_mtp3_itu_spare,
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tvb, SIO_OFFSET, SIO_LENGTH,
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sio);
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2001-05-24 08:13:56 +00:00
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proto_tree_add_uint(sio_tree, hf_mtp3_service_indicator,
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2001-07-07 09:06:40 +00:00
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tvb, SIO_OFFSET, SIO_LENGTH,
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2001-05-24 08:13:56 +00:00
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sio);
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}
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static void
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dissect_mtp3_routing_label(tvbuff_t *tvb, proto_tree *mtp3_tree)
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{
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2001-07-07 09:06:40 +00:00
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guint32 label, dpc, opc;
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guint8 sls;
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proto_item *label_item, *label_dpc_item, *label_opc_item;
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proto_tree *label_tree, *label_dpc_tree, *label_opc_tree;
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switch (mtp3_standard) {
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case ITU_STANDARD:
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label_item = proto_tree_add_text(mtp3_tree, tvb, ITU_ROUTING_LABEL_OFFSET,
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ITU_ROUTING_LABEL_LENGTH, "Routing label");
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label_tree = proto_item_add_subtree(label_item, ett_mtp3_label);
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label = tvb_get_letohl(tvb, ITU_ROUTING_LABEL_OFFSET);
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sls = tvb_get_guint8(tvb, ITU_ROUTING_LABEL_OFFSET);
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proto_tree_add_uint(label_tree, hf_mtp3_itu_dpc, tvb,
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ITU_ROUTING_LABEL_OFFSET, ITU_ROUTING_LABEL_LENGTH,
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label);
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proto_tree_add_uint(label_tree, hf_mtp3_itu_opc, tvb,
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ITU_ROUTING_LABEL_OFFSET, ITU_ROUTING_LABEL_LENGTH,
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label);
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proto_tree_add_uint(label_tree, hf_mtp3_itu_sls, tvb,
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ITU_SLS_OFFSET, ITU_SLS_LENGTH,
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sls);
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break;
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case ANSI_STANDARD:
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/* this could be 5 or 8 bits */
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sls = tvb_get_guint8(tvb, ANSI_SLS_OFFSET);
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/* Create the Routing Label Tree */
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label_item = proto_tree_add_text(mtp3_tree, tvb, ANSI_ROUTING_LABEL_OFFSET,
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ANSI_ROUTING_LABEL_LENGTH, "Routing label");
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label_tree = proto_item_add_subtree(label_item, ett_mtp3_label);
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/* create the DPC tree */
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dpc = tvb_get_ntoh24(tvb, ANSI_DPC_OFFSET);
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label_dpc_item = proto_tree_add_text(label_tree, tvb, ANSI_DPC_OFFSET,
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ANSI_DPC_LENGTH,
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"DPC (%d-%d-%d)",
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(dpc & ANSI_NETWORK_MASK),
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((dpc & ANSI_CLUSTER_MASK) >> 8),
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((dpc & ANSI_MEMBER_MASK) >> 16));
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label_dpc_tree = proto_item_add_subtree(label_dpc_item,
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ett_mtp3_label_dpc);
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proto_tree_add_uint(label_dpc_tree, hf_mtp3_dpc_member,
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tvb, ANSI_DPC_OFFSET, ANSI_NCM_LENGTH, dpc);
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proto_tree_add_uint(label_dpc_tree, hf_mtp3_dpc_cluster,
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tvb, ANSI_DPC_OFFSET, ANSI_NCM_LENGTH, dpc);
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proto_tree_add_uint(label_dpc_tree, hf_mtp3_dpc_network,
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tvb, ANSI_DPC_OFFSET, ANSI_NCM_LENGTH, dpc);
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/* create the OPC tree */
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opc = tvb_get_ntoh24(tvb, ANSI_OPC_OFFSET);
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label_opc_item = proto_tree_add_text(label_tree, tvb, ANSI_OPC_OFFSET,
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ANSI_OPC_LENGTH,
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"OPC (%d-%d-%d)",
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(opc & ANSI_NETWORK_MASK),
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((opc & ANSI_CLUSTER_MASK) >> 8),
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((opc & ANSI_MEMBER_MASK) >> 16));
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label_opc_tree = proto_item_add_subtree(label_opc_item,
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ett_mtp3_label_opc);
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proto_tree_add_uint(label_opc_tree, hf_mtp3_opc_member,
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tvb, ANSI_OPC_OFFSET, ANSI_NCM_LENGTH, opc);
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proto_tree_add_uint(label_opc_tree, hf_mtp3_opc_cluster,
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tvb, ANSI_OPC_OFFSET, ANSI_NCM_LENGTH, opc);
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proto_tree_add_uint(label_opc_tree, hf_mtp3_opc_network,
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tvb, ANSI_OPC_OFFSET, ANSI_NCM_LENGTH,
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opc);
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/* SLS */
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/* TODO: separate 5-bit and 8-bit SLS */
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proto_tree_add_item(label_tree, hf_mtp3_ansi_sls, tvb, ANSI_SLS_OFFSET,
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ANSI_SLS_LENGTH, sls);
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/* proto_tree_add_uint(label_tree, hf_mtp3_ansi_sls, tvb,
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ANSI_SLS_OFFSET, ANSI_SLS_LENGTH,
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sls);*/
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break;
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default:
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printf("MTP3: unknown standard: %d\n", mtp3_standard);
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}
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2001-05-24 08:13:56 +00:00
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}
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static void
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dissect_mtp3_payload(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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guint8 sio;
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guint8 service_indicator;
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tvbuff_t *payload_tvb;
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2001-07-07 09:06:40 +00:00
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sio = tvb_get_guint8(tvb, SIO_OFFSET);
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2001-05-24 08:13:56 +00:00
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service_indicator = sio & SERVICE_INDICATOR_MASK;
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2001-07-07 09:06:40 +00:00
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switch (mtp3_standard) {
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case ITU_STANDARD:
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payload_tvb = tvb_new_subset(tvb, ITU_MTP_PAYLOAD_OFFSET, -1, -1);
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break;
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case ANSI_STANDARD:
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payload_tvb = tvb_new_subset(tvb, ANSI_MTP_PAYLOAD_OFFSET, -1, -1);
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break;
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default:
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printf("MTP3: unknown standard: %d\n", mtp3_standard);
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return;
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}
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2001-05-24 08:13:56 +00:00
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if (!dissector_try_port(mtp3_sio_dissector_table, service_indicator, payload_tvb, pinfo, tree)) {
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proto_tree_add_text(tree, payload_tvb, 0, tvb_length(payload_tvb),
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"Payload (%u byte%s)",
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2001-07-07 09:06:40 +00:00
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tvb_length(payload_tvb), plurality(tvb_length(payload_tvb), "", "s"));
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2001-05-24 08:13:56 +00:00
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}
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}
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/* Code to actually dissect the packets */
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static void
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dissect_mtp3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
|
|
|
|
proto_item *mtp3_item;
|
|
|
|
proto_tree *mtp3_tree;
|
|
|
|
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
2001-07-07 09:06:40 +00:00
|
|
|
if (check_col(pinfo->fd, COL_PROTOCOL))
|
|
|
|
col_set_str(pinfo->fd, COL_PROTOCOL, "MTP3");
|
|
|
|
if (check_col(pinfo->fd, COL_INFO))
|
2001-05-24 08:13:56 +00:00
|
|
|
col_clear(pinfo->fd, COL_INFO);
|
|
|
|
|
|
|
|
/* In the interest of speed, if "tree" is NULL, don't do any work not
|
|
|
|
necessary to generate protocol tree items. */
|
|
|
|
|
|
|
|
if (tree) {
|
|
|
|
|
|
|
|
/* create display subtree for the protocol */
|
2001-07-07 09:06:40 +00:00
|
|
|
mtp3_item = proto_tree_add_item(tree, proto_mtp3, tvb, 0, tvb_length(tvb),
|
|
|
|
FALSE);
|
2001-05-24 08:13:56 +00:00
|
|
|
mtp3_tree = proto_item_add_subtree(mtp3_item, ett_mtp3);
|
2001-07-07 09:06:40 +00:00
|
|
|
|
2001-05-24 08:13:56 +00:00
|
|
|
/* dissect the packet */
|
|
|
|
dissect_mtp3_sio(tvb, mtp3_tree);
|
|
|
|
dissect_mtp3_routing_label(tvb, mtp3_tree);
|
2001-07-07 09:06:40 +00:00
|
|
|
dissect_mtp3_payload(tvb, pinfo, mtp3_tree);
|
2001-05-24 08:13:56 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_register_mtp3(void)
|
2001-07-07 09:06:40 +00:00
|
|
|
{
|
|
|
|
|
2001-05-24 08:13:56 +00:00
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_mtp3_service_indicator,
|
|
|
|
{ "Service indicator",
|
|
|
|
"mtp3.service_indicator",
|
2001-07-07 09:06:40 +00:00
|
|
|
FT_UINT8, BASE_HEX, VALS(service_indicator_code_vals), SERVICE_INDICATOR_MASK,
|
|
|
|
"", HFILL }},
|
2001-05-24 08:13:56 +00:00
|
|
|
{ &hf_mtp3_network_indicator,
|
|
|
|
{ "Network indicator",
|
|
|
|
"mtp3.network_indicator",
|
2001-07-07 09:06:40 +00:00
|
|
|
FT_UINT8, BASE_HEX, VALS(network_indicator_vals), NETWORK_INDICATOR_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_itu_spare,
|
2001-05-24 08:13:56 +00:00
|
|
|
{ "Spare",
|
|
|
|
"mtp3.spare",
|
2001-07-07 09:06:40 +00:00
|
|
|
FT_UINT8, BASE_HEX, NULL, SPARE_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_ansi_priority,
|
|
|
|
{ "Priority",
|
|
|
|
"mtp3.priority",
|
|
|
|
FT_UINT8, BASE_HEX, NULL, ANSI_PRIORITY_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_itu_opc,
|
2001-05-24 08:13:56 +00:00
|
|
|
{ "OPC",
|
|
|
|
"mtp3.opc",
|
2001-07-07 09:06:40 +00:00
|
|
|
FT_UINT32, BASE_DEC, NULL, ITU_OPC_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_opc_network,
|
|
|
|
{ "OPC Network",
|
|
|
|
"mtp3.opc.network",
|
|
|
|
FT_UINT24, BASE_DEC, NULL, ANSI_NETWORK_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_opc_cluster,
|
|
|
|
{ "OPC Cluster",
|
|
|
|
"mtp3.opc.cluster",
|
|
|
|
FT_UINT24, BASE_DEC, NULL, ANSI_CLUSTER_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_opc_member,
|
|
|
|
{ "OPC Member",
|
|
|
|
"mtp3.opc.member",
|
|
|
|
FT_UINT24, BASE_DEC, NULL, ANSI_MEMBER_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_itu_dpc,
|
2001-05-24 08:13:56 +00:00
|
|
|
{ "DPC",
|
|
|
|
"mtp3.dpc",
|
2001-07-07 09:06:40 +00:00
|
|
|
FT_UINT32, BASE_DEC, NULL, ITU_DPC_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_dpc_network,
|
|
|
|
{ "DPC Network",
|
|
|
|
"mtp3.dpc.network",
|
|
|
|
FT_UINT24, BASE_DEC, NULL, ANSI_NETWORK_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_dpc_cluster,
|
|
|
|
{ "DPC Cluster",
|
|
|
|
"mtp3.dpc.cluster",
|
|
|
|
FT_UINT24, BASE_DEC, NULL, ANSI_CLUSTER_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_dpc_member,
|
|
|
|
{ "DPC Member",
|
|
|
|
"mtp3.dpc.member",
|
|
|
|
FT_UINT24, BASE_DEC, NULL, ANSI_MEMBER_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_itu_sls,
|
|
|
|
{ "Signalling Link Selector",
|
|
|
|
"mtp3.sls",
|
|
|
|
FT_UINT32, BASE_DEC, NULL, ITU_SLS_MASK,
|
|
|
|
"", HFILL }},
|
|
|
|
{ &hf_mtp3_ansi_sls,
|
|
|
|
{ "Signalling Link Selector",
|
2001-05-24 08:13:56 +00:00
|
|
|
"mtp3.sls",
|
2001-07-07 09:06:40 +00:00
|
|
|
FT_UINT8, BASE_DEC, NULL, ANSI_5BIT_SLS_MASK,
|
|
|
|
"", HFILL }}
|
2001-05-24 08:13:56 +00:00
|
|
|
};
|
2001-07-07 09:06:40 +00:00
|
|
|
|
2001-05-24 08:13:56 +00:00
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_mtp3,
|
|
|
|
&ett_mtp3_sio,
|
2001-07-07 09:06:40 +00:00
|
|
|
&ett_mtp3_label,
|
|
|
|
&ett_mtp3_label_dpc,
|
|
|
|
&ett_mtp3_label_opc
|
2001-05-24 08:13:56 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
static enum_val_t mtp3_options[] = {
|
2001-07-07 09:06:40 +00:00
|
|
|
{ "ITU", ITU_STANDARD },
|
|
|
|
{ "ANSI", ANSI_STANDARD },
|
|
|
|
{ NULL, 0 }
|
2001-05-24 08:13:56 +00:00
|
|
|
};
|
2001-07-07 09:06:40 +00:00
|
|
|
|
2001-05-24 08:13:56 +00:00
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_mtp3 = proto_register_protocol("Message Transfer Part Level 3",
|
2001-05-31 08:51:29 +00:00
|
|
|
"MTP3", "mtp3");
|
2001-07-07 09:06:40 +00:00
|
|
|
|
2001-05-24 08:13:56 +00:00
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array(proto_mtp3, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
|
|
|
|
/* Register the dissector */
|
|
|
|
register_dissector("mtp3", dissect_mtp3, proto_mtp3);
|
|
|
|
|
|
|
|
mtp3_sio_dissector_table = register_dissector_table("mtp3.service_indicator");
|
2001-07-07 09:06:40 +00:00
|
|
|
|
2001-05-24 08:13:56 +00:00
|
|
|
mtp3_module = prefs_register_protocol(proto_mtp3, NULL);
|
|
|
|
|
2001-07-07 09:06:40 +00:00
|
|
|
prefs_register_enum_preference(mtp3_module,
|
2001-05-24 08:13:56 +00:00
|
|
|
"mtp3_standard",
|
|
|
|
"MTP3 standard",
|
2001-07-07 09:06:40 +00:00
|
|
|
"MTP3 standard",
|
2001-05-24 08:13:56 +00:00
|
|
|
&mtp3_standard,
|
|
|
|
mtp3_options, FALSE);
|
|
|
|
}
|