forked from osmocom/wireshark
303 lines
13 KiB
C
303 lines
13 KiB
C
/* packet-m2pa.c
|
|
* Routines for MTP2 Peer Adaptation Layer dissection
|
|
* It is hopefully (needs testing) compliant to
|
|
* http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m2pa-05.txt
|
|
*
|
|
* Copyright 2001, 2002, Jeff Morriss <jeff.morriss[AT]ulticom.com>,
|
|
* updated by Michael Tuexen <michael.tuexen[AT]siemens.com>
|
|
*
|
|
* $Id: packet-m2pa.c,v 1.12 2002/08/28 21:00:20 jmayer Exp $
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* Copied from packet-m3ua.c
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <epan/packet.h>
|
|
|
|
#define NETWORK_BYTE_ORDER FALSE
|
|
#define SCTP_PORT_M2PA 3565
|
|
#define M2PA_PAYLOAD_PROTOCOL_ID 5
|
|
|
|
static int proto_m2pa = -1;
|
|
static int hf_version = -1;
|
|
static int hf_spare = -1;
|
|
static int hf_type = -1;
|
|
static int hf_class = -1;
|
|
static int hf_length = -1;
|
|
static int hf_unused = -1;
|
|
static int hf_bsn = -1;
|
|
static int hf_fsn = -1;
|
|
static int hf_status = -1;
|
|
static int hf_li_spare = -1;
|
|
static int hf_li_prio = -1;
|
|
static int hf_filler = -1;
|
|
static int hf_unknown_data = -1;
|
|
|
|
static gint ett_m2pa = -1;
|
|
static gint ett_m2pa_li = -1;
|
|
|
|
static int mtp3_proto_id;
|
|
static dissector_handle_t mtp3_handle;
|
|
|
|
#define VERSION_LENGTH 1
|
|
#define SPARE_LENGTH 1
|
|
#define CLASS_LENGTH 1
|
|
#define TYPE_LENGTH 1
|
|
#define LENGTH_LENGTH 4
|
|
#define UNUSED_LENGTH 1
|
|
#define BSN_LENGTH 3
|
|
#define FSN_LENGTH 3
|
|
|
|
#define HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
|
|
CLASS_LENGTH + TYPE_LENGTH + LENGTH_LENGTH + \
|
|
UNUSED_LENGTH + BSN_LENGTH + UNUSED_LENGTH + FSN_LENGTH)
|
|
|
|
#define HEADER_OFFSET 0
|
|
#define VERSION_OFFSET HEADER_OFFSET
|
|
#define SPARE_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
|
|
#define CLASS_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
|
|
#define TYPE_OFFSET (CLASS_OFFSET + CLASS_LENGTH)
|
|
#define LENGTH_OFFSET (TYPE_OFFSET + TYPE_LENGTH)
|
|
#define FIRST_UNUSED_OFFSET (LENGTH_OFFSET + LENGTH_LENGTH)
|
|
#define BSN_OFFSET (FIRST_UNUSED_OFFSET + UNUSED_LENGTH)
|
|
#define SECOND_UNUSED_OFFSET (BSN_OFFSET + BSN_LENGTH)
|
|
#define FSN_OFFSET (SECOND_UNUSED_OFFSET + UNUSED_LENGTH)
|
|
|
|
#define PROTOCOL_VERSION_RELEASE_1 1
|
|
|
|
static const value_string protocol_version_values[] = {
|
|
{ PROTOCOL_VERSION_RELEASE_1, "Release 1" },
|
|
{ 0, NULL } };
|
|
|
|
#define MESSAGE_CLASS_M2PA 0xb
|
|
|
|
static const value_string message_class_values[] = {
|
|
{ MESSAGE_CLASS_M2PA, "M2PA" },
|
|
{ 0, NULL } };
|
|
|
|
#define MESSAGE_TYPE_USER_DATA 0x1
|
|
#define MESSAGE_TYPE_LINK_STATUS 0x2
|
|
|
|
static const value_string message_type_values[] = {
|
|
{ MESSAGE_TYPE_USER_DATA, "User Data" },
|
|
{ MESSAGE_TYPE_LINK_STATUS, "Link Status" },
|
|
{ 0, NULL } };
|
|
|
|
static void
|
|
dissect_m2pa_header(tvbuff_t *header_tvb, proto_tree *m2pa_tree)
|
|
{
|
|
if (m2pa_tree) {
|
|
proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_type, header_tvb, TYPE_OFFSET, TYPE_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_length, header_tvb, LENGTH_OFFSET, LENGTH_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, NETWORK_BYTE_ORDER);
|
|
}
|
|
}
|
|
|
|
#define LI_OFFSET 0
|
|
#define LI_LENGTH 1
|
|
#define MTP3_OFFSET (LI_OFFSET + LI_LENGTH)
|
|
#define LI_SPARE_MASK 0x3f
|
|
#define LI_PRIORITY_MASK 0xc0
|
|
|
|
static void
|
|
dissect_m2pa_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
proto_item *m2pa_li_item;
|
|
proto_tree *m2pa_li_tree;
|
|
tvbuff_t *payload_tvb;
|
|
|
|
if (m2pa_tree) {
|
|
m2pa_li_item = proto_tree_add_text(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, "Length Indicator");
|
|
m2pa_li_tree = proto_item_add_subtree(m2pa_li_item, ett_m2pa_li);
|
|
proto_tree_add_item(m2pa_li_tree, hf_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, NETWORK_BYTE_ORDER);
|
|
proto_tree_add_item(m2pa_li_tree, hf_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, NETWORK_BYTE_ORDER);
|
|
/* Re-adjust length of M2PA item since it will be dissected as MTP3 */
|
|
proto_item_set_len(m2pa_item, HEADER_LENGTH + LI_LENGTH);
|
|
}
|
|
|
|
payload_tvb = tvb_new_subset(message_data_tvb, MTP3_OFFSET, -1, -1);
|
|
call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
|
|
if (!(proto_is_protocol_enabled (mtp3_proto_id)))
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "User Data ");
|
|
}
|
|
|
|
#define STATUS_LENGTH 4
|
|
#define STATUS_OFFSET 0
|
|
#define FILLER_OFFSET (STATUS_OFFSET + STATUS_LENGTH)
|
|
|
|
#define STATUS_ALIGNMENT 1
|
|
#define STATUS_PROVING_NORMAL 2
|
|
#define STATUS_PROVING_EMERGENCY 3
|
|
#define STATUS_READY 4
|
|
#define STATUS_PROCESSOR_OUTAGE 5
|
|
#define STATUS_PROCESSOR_OUTAGE_ENDED 6
|
|
#define STATUS_BUSY 7
|
|
#define STATUS_BUSY_ENDED 8
|
|
#define STATUS_OUT_OF_SERVICE 9
|
|
#define STATUS_IN_SERVICE 10
|
|
|
|
static const value_string link_status_values[] = {
|
|
{ STATUS_ALIGNMENT, "Alignment" },
|
|
{ STATUS_PROVING_NORMAL, "Proving Normal" },
|
|
{ STATUS_PROVING_EMERGENCY, "Proving Emergency" },
|
|
{ STATUS_READY, "Ready" },
|
|
{ STATUS_PROCESSOR_OUTAGE, "Processor Outage" },
|
|
{ STATUS_PROCESSOR_OUTAGE_ENDED, "Processor Outage Ended" },
|
|
{ STATUS_BUSY, "Busy" },
|
|
{ STATUS_BUSY_ENDED, "Busy Ended" },
|
|
{ STATUS_OUT_OF_SERVICE, "Out of Service" },
|
|
{ STATUS_IN_SERVICE, "In Service" },
|
|
{ 0, NULL } };
|
|
|
|
static void
|
|
dissect_m2pa_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
|
|
{
|
|
guint16 filler_length;
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "Link status ");
|
|
if (m2pa_tree) {
|
|
filler_length = tvb_length(message_data_tvb) - STATUS_LENGTH;
|
|
proto_tree_add_item(m2pa_tree, hf_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, NETWORK_BYTE_ORDER);
|
|
if (filler_length > 0)
|
|
proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, NETWORK_BYTE_ORDER);
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_m2pa_unknown_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
|
|
{
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_append_str(pinfo->cinfo, COL_INFO, "Unknown ");
|
|
if (m2pa_tree)
|
|
proto_tree_add_item(m2pa_tree, hf_unknown_data, message_data_tvb, 0, tvb_length(message_data_tvb), NETWORK_BYTE_ORDER);
|
|
}
|
|
|
|
#define MESSAGE_DATA_OFFSET (HEADER_OFFSET + HEADER_LENGTH)
|
|
|
|
static void
|
|
dissect_m2pa_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, LENGTH_OFFSET) - HEADER_LENGTH;
|
|
message_data_tvb = tvb_new_subset(message_tvb, MESSAGE_DATA_OFFSET, message_data_length, message_data_length);
|
|
type = tvb_get_guint8(message_tvb, TYPE_OFFSET);
|
|
|
|
switch(type) {
|
|
case MESSAGE_TYPE_USER_DATA:
|
|
dissect_m2pa_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
break;
|
|
|
|
case MESSAGE_TYPE_LINK_STATUS:
|
|
dissect_m2pa_link_status_message(message_data_tvb, pinfo, m2pa_tree);
|
|
break;
|
|
|
|
default:
|
|
dissect_m2pa_unknown_message(message_data_tvb, pinfo, m2pa_tree);
|
|
}
|
|
|
|
}
|
|
static void
|
|
dissect_m2pa_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
|
|
{
|
|
tvbuff_t *header_tvb;
|
|
|
|
header_tvb = tvb_new_subset(message_tvb, HEADER_OFFSET, HEADER_LENGTH, HEADER_LENGTH);
|
|
dissect_m2pa_header(header_tvb, m2pa_tree);
|
|
dissect_m2pa_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))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA");
|
|
|
|
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;
|
|
};
|
|
|
|
dissect_m2pa_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
|
|
}
|
|
|
|
void
|
|
proto_register_m2pa(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_version, { "Version", "m2pa.version", FT_UINT8, BASE_DEC, VALS(protocol_version_values), 0x0, "", HFILL} },
|
|
{ &hf_spare, { "Spare", "m2pa.spare", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL} },
|
|
{ &hf_type, { "Message Type", "m2pa.type", FT_UINT8, BASE_DEC, VALS(message_type_values), 0x0, "", HFILL} },
|
|
{ &hf_class, { "Message Class", "m2pa.class", FT_UINT8, BASE_DEC, VALS(message_class_values), 0x0, "", HFILL} },
|
|
{ &hf_length, { "Message length", "m2pa.length", FT_UINT32, BASE_DEC, NULL, 0x0, "", HFILL} },
|
|
{ &hf_unused, { "Unused", "m2pa.unused", FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL} },
|
|
{ &hf_bsn, { "BSN", "m2pa.bsn", FT_UINT24, BASE_DEC, NULL, 0x0, "", HFILL} },
|
|
{ &hf_fsn, { "FSN", "m2pa.fsn", FT_UINT24, BASE_DEC, NULL, 0x0, "", HFILL} },
|
|
{ &hf_li_spare, { "Spare", "m2pa.li_spare", FT_UINT8, BASE_HEX, NULL, LI_SPARE_MASK, "", HFILL} },
|
|
{ &hf_li_prio, { "Priority", "m2pa.li_priority", FT_UINT8, BASE_HEX, NULL, LI_PRIORITY_MASK, "", HFILL} },
|
|
{ &hf_status, { "Link Status", "m2pa.status", FT_UINT32, BASE_DEC, VALS(link_status_values), 0x0, "", HFILL} },
|
|
{ &hf_filler, { "Filler", "m2pa.filler", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } },
|
|
{ &hf_unknown_data, { "Unknown Data", "m2pa.unknown_data", FT_BYTES, BASE_NONE, NULL, 0x0, "", HFILL } }
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_m2pa,
|
|
&ett_m2pa_li
|
|
};
|
|
|
|
proto_m2pa = proto_register_protocol("MTP2 Peer Adaptation Layer (draft-ietf-sigtran-m2pa-05.txt)", "M2PA", "m2pa");
|
|
|
|
proto_register_field_array(proto_m2pa, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_m2pa(void)
|
|
{
|
|
dissector_handle_t m2pa_handle;
|
|
|
|
mtp3_handle = find_dissector("mtp3");
|
|
mtp3_proto_id = proto_get_id_by_filter_name("mtp3");
|
|
m2pa_handle = create_dissector_handle(dissect_m2pa, proto_m2pa);
|
|
dissector_add("sctp.ppi", M2PA_PAYLOAD_PROTOCOL_ID, m2pa_handle);
|
|
dissector_add("sctp.port", SCTP_PORT_M2PA, m2pa_handle);
|
|
}
|