forked from osmocom/wireshark
621 lines
25 KiB
C
621 lines
25 KiB
C
/* packet-m2pa.c
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* Routines for MTP2 Peer Adaptation Layer dissection
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* It is hopefully (needs testing) compliant to
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* http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m2pa-02.txt
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* http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m2pa-08.txt
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* http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m2pa-12.txt
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*
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* Copyright 2001, 2002, Jeff Morriss <jeff.morriss[AT]ulticom.com>,
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* updated by Michael Tuexen <tuexen [AT] fh-muenster.de>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Copied from packet-m3ua.c
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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 <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/sctpppids.h>
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#define NETWORK_BYTE_ORDER FALSE
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#define SCTP_PORT_M2PA 3565
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static guint global_sctp_port = SCTP_PORT_M2PA;
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void proto_reg_handoff_m2pa(void);
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static int proto_m2pa = -1;
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static module_t *m2pa_module;
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static int hf_version = -1;
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static int hf_spare = -1;
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static int hf_v2_type = -1;
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static int hf_v8_type = -1;
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static int hf_v12_type = -1;
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static int hf_class = -1;
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static int hf_length = -1;
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static int hf_unused = -1;
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static int hf_bsn = -1;
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static int hf_fsn = -1;
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static int hf_v2_status = -1;
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static int hf_v8_status = -1;
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static int hf_v12_status = -1;
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static int hf_v2_li_spare = -1;
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static int hf_v8_li_spare = -1;
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static int hf_v2_li_prio = -1;
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static int hf_v8_li_prio = -1;
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static int hf_filler = -1;
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static int hf_unknown_data = -1;
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static int hf_pri_prio = -1;
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static int hf_pri_spare = -1;
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static gint ett_m2pa = -1;
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static gint ett_m2pa_li = -1;
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static dissector_handle_t mtp3_handle;
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typedef enum {
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M2PA_V02 = 1,
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M2PA_V08 = 2,
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M2PA_V12 = 3
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} Version_Type;
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static gint m2pa_version = M2PA_V12;
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#define VERSION_LENGTH 1
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#define SPARE_LENGTH 1
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#define CLASS_LENGTH 1
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#define V2_TYPE_LENGTH 2
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#define V8_TYPE_LENGTH 1
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#define V12_TYPE_LENGTH V8_TYPE_LENGTH
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#define LENGTH_LENGTH 4
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#define UNUSED_LENGTH 1
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#define BSN_LENGTH 3
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#define FSN_LENGTH 3
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#define V2_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
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V2_TYPE_LENGTH + LENGTH_LENGTH)
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#define V8_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
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CLASS_LENGTH + V8_TYPE_LENGTH + LENGTH_LENGTH + \
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UNUSED_LENGTH + BSN_LENGTH + UNUSED_LENGTH + \
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FSN_LENGTH)
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#define V12_HEADER_LENGTH V8_HEADER_LENGTH
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#define HEADER_OFFSET 0
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#define VERSION_OFFSET HEADER_OFFSET
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#define SPARE_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
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#define CLASS_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
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#define V2_TYPE_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
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#define V8_TYPE_OFFSET (CLASS_OFFSET + CLASS_LENGTH)
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#define V12_TYPE_OFFSET V8_TYPE_OFFSET
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#define V8_LENGTH_OFFSET (V8_TYPE_OFFSET + V8_TYPE_LENGTH)
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#define V12_LENGTH_OFFSET V8_LENGTH_OFFSET
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#define V2_LENGTH_OFFSET (V2_TYPE_OFFSET + V2_TYPE_LENGTH)
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#define FIRST_UNUSED_OFFSET (V8_LENGTH_OFFSET + LENGTH_LENGTH)
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#define BSN_OFFSET (FIRST_UNUSED_OFFSET + UNUSED_LENGTH)
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#define SECOND_UNUSED_OFFSET (BSN_OFFSET + BSN_LENGTH)
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#define FSN_OFFSET (SECOND_UNUSED_OFFSET + UNUSED_LENGTH)
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static const value_string protocol_version_values[] = {
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{ 1, "Release 1" },
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{ 0, NULL } };
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static const value_string message_class_values[] = {
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{ 0xb, "M2PA" },
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{ 0, NULL } };
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#define V2_USER_DATA_TYPE 0x0601
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#define V2_LINK_STATUS_TYPE 0x0602
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static const value_string v2_message_type_values[] = {
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{ V2_USER_DATA_TYPE, "User Data" },
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{ V2_LINK_STATUS_TYPE, "Link Status" },
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{ 0, NULL } };
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#define V8_USER_DATA_TYPE 0x0001
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#define V8_LINK_STATUS_TYPE 0x0002
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static const value_string v8_message_type_values[] = {
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{ V8_USER_DATA_TYPE, "User Data" },
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{ V8_LINK_STATUS_TYPE, "Link Status" },
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{ 0, NULL } };
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#define V12_USER_DATA_TYPE V8_USER_DATA_TYPE
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#define V12_LINK_STATUS_TYPE V8_LINK_STATUS_TYPE
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static const value_string v12_message_type_values[] = {
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{ V12_USER_DATA_TYPE, "User Data" },
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{ V12_LINK_STATUS_TYPE, "Link Status" },
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{ 0, NULL } };
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static void
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dissect_v2_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
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{
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guint16 message_type;
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message_type = tvb_get_ntohs(header_tvb, V2_TYPE_OFFSET);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(message_type, v2_message_type_values, "reserved"));
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if (m2pa_tree) {
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proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_v2_type, header_tvb, V2_TYPE_OFFSET, V2_TYPE_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V2_LENGTH_OFFSET, LENGTH_LENGTH, NETWORK_BYTE_ORDER);
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}
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}
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static void
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dissect_v8_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
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{
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guint8 message_type;
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message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(message_type, v8_message_type_values, "Unknown"));
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if (m2pa_tree) {
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proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_v8_type, header_tvb, V8_TYPE_OFFSET, V8_TYPE_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V8_LENGTH_OFFSET, LENGTH_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, NETWORK_BYTE_ORDER);
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}
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}
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static void
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dissect_v12_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
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{
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guint8 message_type;
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message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
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if (check_col(pinfo->cinfo, COL_INFO))
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(message_type, v8_message_type_values, "Unknown"));
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if (m2pa_tree) {
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proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_v12_type, header_tvb, V12_TYPE_OFFSET, V12_TYPE_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V12_LENGTH_OFFSET, LENGTH_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, NETWORK_BYTE_ORDER);
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}
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}
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#define LI_OFFSET 0
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#define LI_LENGTH 1
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#define MTP3_OFFSET (LI_OFFSET + LI_LENGTH)
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#define V2_LI_SPARE_MASK 0xfc
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#define V2_LI_PRIORITY_MASK 0x3
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static void
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dissect_v2_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
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{
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proto_item *m2pa_li_item;
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proto_tree *m2pa_li_tree;
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tvbuff_t *payload_tvb;
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if (tvb_length(message_data_tvb) > 0) {
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if (m2pa_tree) {
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m2pa_li_item = proto_tree_add_text(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, "Length Indicator");
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m2pa_li_tree = proto_item_add_subtree(m2pa_li_item, ett_m2pa_li);
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proto_tree_add_item(m2pa_li_tree, hf_v2_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_li_tree, hf_v2_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, NETWORK_BYTE_ORDER);
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/* Re-adjust length of M2PA item since it will be dissected as MTP3 */
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proto_item_set_len(m2pa_item, V2_HEADER_LENGTH + LI_LENGTH);
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}
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}
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payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
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call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
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}
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#define V8_LI_SPARE_MASK 0x3f
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#define V8_LI_PRIORITY_MASK 0xc0
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static void
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dissect_v8_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
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{
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proto_item *m2pa_li_item;
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proto_tree *m2pa_li_tree;
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tvbuff_t *payload_tvb;
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if (tvb_length(message_data_tvb) > 0) {
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if (m2pa_tree) {
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m2pa_li_item = proto_tree_add_text(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, "Length Indicator");
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m2pa_li_tree = proto_item_add_subtree(m2pa_li_item, ett_m2pa_li);
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proto_tree_add_item(m2pa_li_tree, hf_v8_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_li_tree, hf_v8_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, NETWORK_BYTE_ORDER);
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/* Re-adjust length of M2PA item since it will be dissected as MTP3 */
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proto_item_set_len(m2pa_item, V8_HEADER_LENGTH + LI_LENGTH);
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}
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payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
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call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
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}
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}
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#define PRIORITY_MASK 0xc0
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#define SPARE_MASK 0x3f
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#define PRI_OFFSET 0
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#define PRI_LENGTH 1
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static void
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dissect_v12_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
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{
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proto_item *m2pa_li_item;
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proto_tree *m2pa_li_tree;
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tvbuff_t *payload_tvb;
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if (tvb_length(message_data_tvb) > 0) {
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if (m2pa_tree) {
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m2pa_li_item = proto_tree_add_text(m2pa_tree, message_data_tvb, PRI_OFFSET, PRI_LENGTH, "Priority");
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m2pa_li_tree = proto_item_add_subtree(m2pa_li_item, ett_m2pa_li);
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proto_tree_add_item(m2pa_li_tree, hf_pri_prio, message_data_tvb, PRI_OFFSET, PRI_LENGTH, NETWORK_BYTE_ORDER);
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proto_tree_add_item(m2pa_li_tree, hf_pri_spare, message_data_tvb, PRI_OFFSET, PRI_LENGTH, NETWORK_BYTE_ORDER);
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/* Re-adjust length of M2PA item since it will be dissected as MTP3 */
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proto_item_set_len(m2pa_item, V12_HEADER_LENGTH + PRI_LENGTH);
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}
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payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
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call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
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}
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}
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static const value_string v2_link_status_values[] = {
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{ 1, "In Service" },
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{ 2, "Processor Outage" },
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{ 3, "Processor Outage Ended" },
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{ 4, "Busy" },
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{ 5, "Busy Ended" },
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{ 0, NULL } };
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#define STATUS_LENGTH 4
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#define STATUS_OFFSET 0
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#define FILLER_OFFSET (STATUS_OFFSET + STATUS_LENGTH)
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static void
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dissect_v2_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
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{
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), v2_link_status_values, "Unknown"));
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if (m2pa_tree)
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proto_tree_add_item(m2pa_tree, hf_v2_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, NETWORK_BYTE_ORDER);
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}
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static const value_string v8_link_status_values[] = {
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{ 1, "Alignment" },
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{ 2, "Proving Normal" },
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{ 3, "Proving Emergency" },
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{ 4, "Ready" },
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{ 5, "Processor Outage" },
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{ 6, "Processor Outage Ended" },
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{ 7, "Busy" },
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{ 8, "Busy Ended" },
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{ 9, "Out of Service" },
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{ 0, NULL } };
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static void
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dissect_v8_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
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{
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guint16 filler_length;
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), v8_link_status_values, "Unknown"));
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filler_length = tvb_length(message_data_tvb) - STATUS_LENGTH;
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proto_tree_add_item(m2pa_tree, hf_v8_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, NETWORK_BYTE_ORDER);
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if (filler_length > 0)
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proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, NETWORK_BYTE_ORDER);
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}
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static const value_string v12_link_status_values[] = {
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{ 1, "Alignment" },
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{ 2, "Proving Normal" },
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{ 3, "Proving Emergency" },
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{ 4, "Ready" },
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{ 5, "Processor Outage" },
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{ 6, "Processor Outage Ended" },
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{ 7, "Busy" },
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{ 8, "Busy Ended" },
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{ 9, "Out of Service" },
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{ 0, NULL } };
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static void
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dissect_v12_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
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{
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guint16 filler_length;
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if (check_col(pinfo->cinfo, COL_INFO))
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col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), v12_link_status_values, "Unknown"));
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filler_length = tvb_length(message_data_tvb) - STATUS_LENGTH;
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proto_tree_add_item(m2pa_tree, hf_v12_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, NETWORK_BYTE_ORDER);
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if (filler_length > 0)
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proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, NETWORK_BYTE_ORDER);
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}
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static void
|
|
dissect_unknown_message(tvbuff_t *message_data_tvb, proto_tree *m2pa_tree)
|
|
{
|
|
guint length;
|
|
|
|
length = tvb_length(message_data_tvb);
|
|
if ((m2pa_tree) && (length > 0))
|
|
proto_tree_add_item(m2pa_tree, hf_unknown_data, message_data_tvb, 0, length, NETWORK_BYTE_ORDER);
|
|
}
|
|
|
|
#define V2_MESSAGE_DATA_OFFSET (HEADER_OFFSET + V2_HEADER_LENGTH)
|
|
|
|
static void
|
|
dissect_v2_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
guint32 message_data_length;
|
|
guint16 type;
|
|
tvbuff_t *message_data_tvb;
|
|
|
|
message_data_length = (gint) tvb_get_ntohl(message_tvb, V2_LENGTH_OFFSET);
|
|
if ((gint) message_data_length < 1) {
|
|
if (m2pa_tree)
|
|
proto_tree_add_text(m2pa_tree, message_tvb, V2_LENGTH_OFFSET, 4,
|
|
"Invalid message data length: %u", message_data_length);
|
|
THROW(ReportedBoundsError);
|
|
}
|
|
|
|
message_data_tvb = tvb_new_subset(message_tvb, V2_MESSAGE_DATA_OFFSET, message_data_length, message_data_length);
|
|
type = tvb_get_ntohs(message_tvb, V2_TYPE_OFFSET);
|
|
|
|
switch(type) {
|
|
case V2_USER_DATA_TYPE:
|
|
dissect_v2_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
break;
|
|
case V2_LINK_STATUS_TYPE:
|
|
dissect_v2_link_status_message(message_data_tvb, pinfo, m2pa_tree);
|
|
break;
|
|
default:
|
|
dissect_unknown_message(message_data_tvb, m2pa_tree);
|
|
}
|
|
}
|
|
|
|
#define V8_MESSAGE_DATA_OFFSET (HEADER_OFFSET + V8_HEADER_LENGTH)
|
|
|
|
static void
|
|
dissect_v8_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
guint32 message_data_length;
|
|
guint8 type;
|
|
tvbuff_t *message_data_tvb;
|
|
|
|
message_data_length = tvb_get_ntohl(message_tvb, V8_LENGTH_OFFSET) - V8_HEADER_LENGTH;
|
|
if ((gint) message_data_length < 1) {
|
|
if (m2pa_tree)
|
|
proto_tree_add_text(m2pa_tree, message_tvb, V8_LENGTH_OFFSET, 4,
|
|
"Invalid message data length: %u", message_data_length);
|
|
THROW(ReportedBoundsError);
|
|
}
|
|
message_data_tvb = tvb_new_subset(message_tvb, V8_MESSAGE_DATA_OFFSET, message_data_length, message_data_length);
|
|
type = tvb_get_guint8(message_tvb, V8_TYPE_OFFSET);
|
|
|
|
|
|
switch(type) {
|
|
case V8_USER_DATA_TYPE:
|
|
dissect_v8_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
break;
|
|
case V8_LINK_STATUS_TYPE:
|
|
dissect_v8_link_status_message(message_data_tvb, pinfo, m2pa_tree);
|
|
break;
|
|
default:
|
|
dissect_unknown_message(message_data_tvb, m2pa_tree);
|
|
}
|
|
}
|
|
|
|
#define V12_MESSAGE_DATA_OFFSET (HEADER_OFFSET + V12_HEADER_LENGTH)
|
|
|
|
static void
|
|
dissect_v12_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
guint32 message_data_length;
|
|
guint8 type;
|
|
tvbuff_t *message_data_tvb;
|
|
|
|
message_data_length = tvb_get_ntohl(message_tvb, V12_LENGTH_OFFSET) - V8_HEADER_LENGTH;
|
|
message_data_tvb = tvb_new_subset(message_tvb, V12_MESSAGE_DATA_OFFSET, message_data_length, message_data_length);
|
|
type = tvb_get_guint8(message_tvb, V12_TYPE_OFFSET);
|
|
|
|
|
|
switch(type) {
|
|
case V12_USER_DATA_TYPE:
|
|
dissect_v12_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
break;
|
|
case V12_LINK_STATUS_TYPE:
|
|
dissect_v12_link_status_message(message_data_tvb, pinfo, m2pa_tree);
|
|
break;
|
|
default:
|
|
dissect_unknown_message(message_data_tvb, m2pa_tree);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_v2_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
dissect_v2_header(message_tvb, pinfo, m2pa_tree);
|
|
dissect_v2_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
}
|
|
|
|
static void
|
|
dissect_v8_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
dissect_v8_header(message_tvb, pinfo, m2pa_tree);
|
|
dissect_v8_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
}
|
|
|
|
static void
|
|
dissect_v12_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
dissect_v12_header(message_tvb, pinfo, m2pa_tree);
|
|
dissect_v12_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
}
|
|
|
|
static void
|
|
dissect_m2pa(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_item *m2pa_item;
|
|
proto_tree *m2pa_tree;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
switch(m2pa_version) {
|
|
case M2PA_V02:
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA (ID 02)");
|
|
break;
|
|
case M2PA_V08:
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA (ID 08)");
|
|
break;
|
|
case M2PA_V12:
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA (ID 12)");
|
|
break;
|
|
};
|
|
|
|
if (tree) {
|
|
m2pa_item = proto_tree_add_item(tree, proto_m2pa, tvb, 0, -1, FALSE);
|
|
m2pa_tree = proto_item_add_subtree(m2pa_item, ett_m2pa);
|
|
} else {
|
|
m2pa_item = NULL;
|
|
m2pa_tree = NULL;
|
|
}
|
|
|
|
switch(m2pa_version) {
|
|
case M2PA_V02:
|
|
dissect_v2_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
break;
|
|
case M2PA_V08:
|
|
dissect_v8_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
break;
|
|
case M2PA_V12:
|
|
dissect_v12_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
break;
|
|
};
|
|
}
|
|
|
|
void
|
|
proto_register_m2pa(void)
|
|
{
|
|
static hf_register_info hf[] =
|
|
{ { &hf_version, { "Version", "m2pa.version", FT_UINT8, BASE_DEC, VALS(protocol_version_values), 0x0, NULL, HFILL} },
|
|
{ &hf_spare, { "Spare", "m2pa.spare", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },
|
|
{ &hf_v2_type, { "Message Type", "m2pa.type", FT_UINT16, BASE_HEX, VALS(v2_message_type_values), 0x0, NULL, HFILL} },
|
|
{ &hf_v8_type, { "Message Type", "m2pa.type", FT_UINT8, BASE_DEC, VALS(v8_message_type_values), 0x0, NULL, HFILL} },
|
|
{ &hf_v12_type, { "Message Type", "m2pa.type", FT_UINT8, BASE_DEC, VALS(v12_message_type_values), 0x0, NULL, HFILL} },
|
|
{ &hf_class, { "Message Class", "m2pa.class", FT_UINT8, BASE_DEC, VALS(message_class_values), 0x0, NULL, HFILL} },
|
|
{ &hf_length, { "Message length", "m2pa.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} },
|
|
{ &hf_unused, { "Unused", "m2pa.unused", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },
|
|
{ &hf_bsn, { "BSN", "m2pa.bsn", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL} },
|
|
{ &hf_fsn, { "FSN", "m2pa.fsn", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL} },
|
|
{ &hf_v2_li_spare, { "Spare", "m2pa.li_spare", FT_UINT8, BASE_DEC, NULL, V2_LI_SPARE_MASK, NULL, HFILL} },
|
|
{ &hf_v8_li_spare, { "Spare", "m2pa.li_spare", FT_UINT8, BASE_HEX, NULL, V8_LI_SPARE_MASK, NULL, HFILL} },
|
|
{ &hf_pri_spare, { "Spare", "m2pa.priority_spare", FT_UINT8, BASE_HEX, NULL, SPARE_MASK, NULL, HFILL} },
|
|
{ &hf_v2_li_prio, { "Priority", "m2pa.li_priority", FT_UINT8, BASE_DEC, NULL, V2_LI_PRIORITY_MASK, NULL, HFILL} },
|
|
{ &hf_v8_li_prio, { "Priority", "m2pa.li_priority", FT_UINT8, BASE_HEX, NULL, V8_LI_PRIORITY_MASK, NULL, HFILL} },
|
|
{ &hf_pri_prio, { "Priority", "m2pa.priority", FT_UINT8, BASE_HEX, NULL, PRIORITY_MASK, NULL, HFILL} },
|
|
{ &hf_v2_status, { "Link Status", "m2pa.status", FT_UINT32, BASE_DEC, VALS(v2_link_status_values), 0x0, NULL, HFILL} },
|
|
{ &hf_v8_status, { "Link Status", "m2pa.status", FT_UINT32, BASE_DEC, VALS(v8_link_status_values), 0x0, NULL, HFILL} },
|
|
{ &hf_v12_status, { "Link Status", "m2pa.status", FT_UINT32, BASE_DEC, VALS(v12_link_status_values), 0x0, NULL, HFILL} },
|
|
{ &hf_filler, { "Filler", "m2pa.filler", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} },
|
|
{ &hf_unknown_data, { "Unknown Data", "m2pa.unknown_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} }
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_m2pa,
|
|
&ett_m2pa_li
|
|
};
|
|
|
|
static enum_val_t m2pa_version_options[] = {
|
|
{ "draft-2", "Internet Draft version 2", M2PA_V02 },
|
|
{ "draft-8", "Internet Draft version 8", M2PA_V08 },
|
|
{ "draft-12", "Internet Draft version 12", M2PA_V12 },
|
|
{ NULL, NULL, 0 }
|
|
};
|
|
|
|
proto_m2pa = proto_register_protocol("MTP2 Peer Adaptation Layer", "M2PA", "m2pa");
|
|
|
|
proto_register_field_array(proto_m2pa, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
/* Allow other dissectors to find this one by name. */
|
|
register_dissector("m2pa", dissect_m2pa, proto_m2pa);
|
|
|
|
m2pa_module = prefs_register_protocol(proto_m2pa, proto_reg_handoff_m2pa);
|
|
|
|
prefs_register_enum_preference(m2pa_module, "version", "M2PA version", "Version used by Wireshark", &m2pa_version, m2pa_version_options, FALSE);
|
|
prefs_register_uint_preference(m2pa_module, "port", "M2PA SCTP Port", "Set the port for M2PA messages (Default of 3565)", 10, &global_sctp_port);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_m2pa(void)
|
|
{
|
|
static gboolean prefs_initialized = FALSE;
|
|
static dissector_handle_t m2pa_handle;
|
|
static guint sctp_port;
|
|
|
|
/* Port preferences code shamelessly copied from packet-beep.c */
|
|
if (!prefs_initialized) {
|
|
m2pa_handle = find_dissector("m2pa");
|
|
mtp3_handle = find_dissector("mtp3");
|
|
|
|
dissector_add("sctp.ppi", M2PA_PAYLOAD_PROTOCOL_ID, m2pa_handle);
|
|
|
|
prefs_initialized = TRUE;
|
|
|
|
} else {
|
|
|
|
dissector_delete("sctp.port", sctp_port, m2pa_handle);
|
|
|
|
}
|
|
|
|
/* Set our port number for future use */
|
|
sctp_port = global_sctp_port;
|
|
|
|
dissector_add("sctp.port", sctp_port, m2pa_handle);
|
|
}
|