2001-12-16 22:30:11 +00:00
|
|
|
/* packet-m2tp.c
|
|
|
|
* Routines for M2TP User Adaptation Layer dissection
|
|
|
|
* M2TP - MTP2 Transparent Proxy - is a Radisys proprietary
|
|
|
|
* protocol based on the IETF SIGTRAN standard
|
|
|
|
*
|
|
|
|
* Copyright 2001, Heinz Prantner <heinz.prantner[AT]radisys.com>
|
|
|
|
*
|
2003-01-14 23:53:40 +00:00
|
|
|
* $Id: packet-m2tp.c,v 1.6 2003/01/14 23:53:32 guy Exp $
|
2001-12-16 22:30:11 +00:00
|
|
|
*
|
|
|
|
* Ethereal - Network traffic analyzer
|
|
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
|
|
* Copyright 1998 Gerald Combs
|
|
|
|
*
|
|
|
|
* Copied from packet-m3ua.c
|
|
|
|
* Thanks to Michael Tuexen for his valuable improvements
|
2002-08-28 21:04:11 +00:00
|
|
|
*
|
2001-12-16 22:30:11 +00:00
|
|
|
* 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.
|
2002-08-28 21:04:11 +00:00
|
|
|
*
|
2001-12-16 22:30:11 +00:00
|
|
|
* 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.
|
2002-08-28 21:04:11 +00:00
|
|
|
*
|
2001-12-16 22:30:11 +00:00
|
|
|
* 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 <glib.h>
|
|
|
|
|
2002-01-21 07:37:49 +00:00
|
|
|
#include <epan/packet.h>
|
2003-01-14 23:53:40 +00:00
|
|
|
#include "sctpppids.h"
|
2001-12-16 22:30:11 +00:00
|
|
|
|
|
|
|
#define SCTP_PORT_M2TP 9908 /* unassigned port number (not assigned by IANA) */
|
|
|
|
|
|
|
|
#define VERSION_LENGTH 1
|
|
|
|
#define RESERVED_LENGTH 1
|
|
|
|
#define MESSAGE_CLASS_LENGTH 1
|
|
|
|
#define MESSAGE_TYPE_LENGTH 1
|
|
|
|
#define MESSAGE_LENGTH_LENGTH 4
|
|
|
|
#define COMMON_HEADER_LENGTH (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
|
|
|
|
MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
|
|
|
|
|
|
|
|
#define VERSION_OFFSET 0
|
|
|
|
#define RESERVED_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
|
|
|
|
#define MESSAGE_CLASS_OFFSET (RESERVED_OFFSET + RESERVED_LENGTH)
|
|
|
|
#define MESSAGE_TYPE_OFFSET (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
|
|
|
|
#define MESSAGE_LENGTH_OFFSET (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
|
|
|
|
|
|
|
|
#define PARAMETER_TAG_LENGTH 2
|
|
|
|
#define PARAMETER_LENGTH_LENGTH 2
|
|
|
|
#define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
|
|
|
|
|
|
|
|
#define PARAMETER_TAG_OFFSET 0
|
|
|
|
#define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
|
|
|
|
#define PARAMETER_VALUE_OFFSET (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
|
|
|
|
#define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
|
|
|
|
|
|
|
|
#define INTERFACE_IDENTIFIER_PARAMETER_TAG 1
|
|
|
|
#define MASTER_SLAVE_INDICATOR_PARAMETER_TAG 2
|
|
|
|
#define M2TP_USER_IDENTIFIER_PARAMETER_TAG 3
|
|
|
|
#define INFO_PARAMETER_TAG 4
|
|
|
|
#define DIAGNOSTIC_INFORMATION_PARAMETER_TAG 7
|
|
|
|
#define HEARTBEAT_DATA_PARAMETER_TAG 9
|
|
|
|
#define REASON_PARAMETER_TAG 10
|
|
|
|
#define ERROR_CODE_PARAMETER_TAG 12
|
|
|
|
#define PROTOCOL_DATA_PARAMETER_TAG 13
|
|
|
|
|
|
|
|
|
|
|
|
static const value_string m2tp_parameter_tag_values[] = {
|
|
|
|
{ INTERFACE_IDENTIFIER_PARAMETER_TAG, "Interface Identifier" },
|
|
|
|
{ MASTER_SLAVE_INDICATOR_PARAMETER_TAG, "Master Slave Indicator" },
|
|
|
|
{ M2TP_USER_IDENTIFIER_PARAMETER_TAG, "M2tp User Identifier" },
|
|
|
|
{ INFO_PARAMETER_TAG, "Info" },
|
|
|
|
{ DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic Information" },
|
|
|
|
{ HEARTBEAT_DATA_PARAMETER_TAG, "Heartbeat Data" },
|
|
|
|
{ REASON_PARAMETER_TAG, "Reason" },
|
|
|
|
{ ERROR_CODE_PARAMETER_TAG, "Error Code" },
|
|
|
|
{ PROTOCOL_DATA_PARAMETER_TAG, "Protocol Data" },
|
|
|
|
{ 0, NULL } };
|
|
|
|
|
|
|
|
#define PROTOCOL_VERSION_RELEASE_1 1
|
|
|
|
|
|
|
|
static const value_string m2tp_protocol_version_values[] = {
|
|
|
|
{ PROTOCOL_VERSION_RELEASE_1, "Release 1" },
|
|
|
|
{ 0, NULL } };
|
|
|
|
|
|
|
|
#define MESSAGE_CLASS_MGMT_MESSAGE 0
|
|
|
|
#define MESSAGE_CLASS_SGSM_MESSAGE 3
|
|
|
|
#define MESSAGE_CLASS_MAUP_MESSAGE 6
|
|
|
|
#define MESSAGE_CLASS_DATA_MESSAGE 255
|
|
|
|
|
|
|
|
static const value_string m2tp_message_class_values[] = {
|
|
|
|
{ MESSAGE_CLASS_MGMT_MESSAGE, "Management Messages" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE, "SG State Maintenance Messages" },
|
|
|
|
{ MESSAGE_CLASS_MAUP_MESSAGE, "MTP2 User Adaptation Messages" },
|
|
|
|
{ MESSAGE_CLASS_DATA_MESSAGE, "User Data Messages" },
|
|
|
|
{ 0, NULL } };
|
|
|
|
|
|
|
|
/* management messages */
|
|
|
|
#define MESSAGE_TYPE_ERR 0
|
|
|
|
|
|
|
|
/* sg state maintenance messages */
|
|
|
|
#define MESSAGE_TYPE_UP 1
|
|
|
|
#define MESSAGE_TYPE_DOWN 2
|
|
|
|
#define MESSAGE_TYPE_BEAT 3
|
|
|
|
#define MESSAGE_TYPE_UP_ACK 4
|
|
|
|
#define MESSAGE_TYPE_DOWN_ACK 5
|
|
|
|
#define MESSAGE_TYPE_BEAT_ACK 6
|
|
|
|
|
|
|
|
/* mtp2 user message */
|
|
|
|
#define MESSAGE_TYPE_DATA 1
|
|
|
|
|
|
|
|
|
|
|
|
static const value_string m2tp_message_class_type_values[] = {
|
|
|
|
{ MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "Error (ERR)" },
|
|
|
|
{ MESSAGE_CLASS_DATA_MESSAGE * 256 + MESSAGE_TYPE_DATA, "Payload data (DATA)" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP up (UP)" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP down (DOWN)" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "Heartbeat (BEAT)" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP up ack (UP ACK)" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP down ack (DOWN ACK)" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "Heartbeat ack (BEAT ACK)" },
|
|
|
|
{ 0, NULL } };
|
|
|
|
|
|
|
|
static const value_string m2tp_message_class_type_acro_values[] = {
|
|
|
|
{ MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "ERR" },
|
|
|
|
{ MESSAGE_CLASS_DATA_MESSAGE * 256 + MESSAGE_TYPE_DATA, "DATA" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP_UP" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP_DOWN" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "BEAT" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP_UP_ACK" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP_DOWN_ACK" },
|
|
|
|
{ MESSAGE_CLASS_SGSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "BEAT_ACK" },
|
|
|
|
{ 0, NULL } };
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#define HEARTBEAT_PERIOD_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
|
|
|
|
#define INTERFACE_IDENTIFIER_LENGTH 4
|
|
|
|
#define INTERFACE_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
|
|
|
|
#define M2TP_USER_LENGTH 4
|
|
|
|
#define M2TP_USER_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
|
|
|
|
#define PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
#define MASTER_SLAVE_LENGTH 4
|
|
|
|
#define MASTER_SLAVE_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
|
|
|
|
#define REASON_LENGTH 4
|
|
|
|
#define REASON_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
|
|
|
|
#define HEART_BEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
|
|
|
|
#define ERROR_CODE_LENGTH 4
|
|
|
|
#define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
#define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
|
|
|
|
#define BSN_OFFSET PARAMETER_VALUE_OFFSET
|
|
|
|
#define FSN_OFFSET PARAMETER_VALUE_OFFSET+1
|
|
|
|
|
|
|
|
#define M2TP_USER_MTP2 1
|
|
|
|
#define M2TP_USER_Q921 2
|
|
|
|
#define M2TP_USER_FRAME_RELAY 3
|
|
|
|
|
|
|
|
static const value_string m2tp_user_identifier_values[] = {
|
|
|
|
{ M2TP_USER_MTP2, "MTP2" },
|
|
|
|
{ M2TP_USER_Q921, "Q.921" },
|
|
|
|
{ M2TP_USER_FRAME_RELAY, "Frame Relay" },
|
|
|
|
{ 0, NULL }};
|
|
|
|
|
|
|
|
#define M2TP_MODE_MASTER 1
|
|
|
|
#define M2TP_MODE_SLAVE 2
|
|
|
|
|
|
|
|
static const value_string m2tp_mode_values[] = {
|
|
|
|
{ M2TP_MODE_MASTER, "Master" },
|
|
|
|
{ M2TP_MODE_SLAVE, "Slave" },
|
|
|
|
{ 0, NULL}};
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
#define M2TP_ERROR_CODE_INVALID_VERSION 1
|
|
|
|
#define M2TP_ERROR_CODE_INVALID_INTERFACE_IDENTIFIER 2
|
|
|
|
#define M2TP_ERROR_CODE_INVALID_ADAPTATION_LAYER_IDENTIFIER 3
|
|
|
|
#define M2TP_ERROR_CODE_INVALID_MESSAGE_TYPE 4
|
|
|
|
#define M2TP_ERROR_CODE_INVALID_TRAFFIC_HANDLING_MODE 5
|
|
|
|
#define M2TP_ERROR_CODE_UNEXPECTED_MESSAGE 6
|
|
|
|
#define M2TP_ERROR_CODE_PROTOCOL_ERROR 7
|
|
|
|
#define M2TP_ERROR_CODE_INVALID_STREAM_IDENTIFIER 8
|
|
|
|
#define M2TP_ERROR_CODE_INCOMPATIBLE_MASTER_SLAVE_CONFIGURATION 9
|
|
|
|
|
|
|
|
static const value_string m2tp_error_code_values[] = {
|
|
|
|
{ M2TP_ERROR_CODE_INVALID_VERSION, "Invalid Version" },
|
|
|
|
{ M2TP_ERROR_CODE_INVALID_INTERFACE_IDENTIFIER, "Invalid Interface Identifier" },
|
|
|
|
{ M2TP_ERROR_CODE_INVALID_ADAPTATION_LAYER_IDENTIFIER, "Invalid Adaptation Layer Identifier" },
|
|
|
|
{ M2TP_ERROR_CODE_INVALID_MESSAGE_TYPE, "Invalid Message Type" },
|
|
|
|
{ M2TP_ERROR_CODE_INVALID_TRAFFIC_HANDLING_MODE, "Invalid Traffic Handling Mode" },
|
|
|
|
{ M2TP_ERROR_CODE_UNEXPECTED_MESSAGE, "Unexpected Message" },
|
|
|
|
{ M2TP_ERROR_CODE_PROTOCOL_ERROR, "Protocol Error" },
|
|
|
|
{ M2TP_ERROR_CODE_INVALID_STREAM_IDENTIFIER, "Invalid Stream Identified" },
|
|
|
|
{ M2TP_ERROR_CODE_INCOMPATIBLE_MASTER_SLAVE_CONFIGURATION,"Incompatible Master Slave Configuration" },
|
|
|
|
{ 0, NULL } };
|
|
|
|
|
|
|
|
#define MANAGEMENT_ORDER_REASON_CODE 1
|
|
|
|
#define MTP_RELEASE_REASON_CODE 2
|
|
|
|
|
|
|
|
static const value_string m2tp_reason_code_values[] = {
|
|
|
|
{ MANAGEMENT_ORDER_REASON_CODE, "Management Order" },
|
|
|
|
{ MTP_RELEASE_REASON_CODE, "MTP Release" },
|
|
|
|
{ 0, NULL } };
|
|
|
|
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
/* Initialize the protocol and registered fields */
|
|
|
|
static int proto_m2tp = -1;
|
|
|
|
static int hf_m2tp_version = -1;
|
|
|
|
static int hf_m2tp_reserved = -1;
|
|
|
|
static int hf_m2tp_message_class = -1;
|
|
|
|
static int hf_m2tp_message_type = -1;
|
|
|
|
static int hf_m2tp_message_length = -1;
|
|
|
|
static int hf_m2tp_parameter_tag = -1;
|
|
|
|
static int hf_m2tp_parameter_length = -1;
|
|
|
|
static int hf_m2tp_parameter_value = -1;
|
|
|
|
static int hf_m2tp_parameter_padding = -1;
|
|
|
|
static int hf_m2tp_interface_identifier = -1;
|
|
|
|
static int hf_m2tp_user = -1;
|
|
|
|
static int hf_m2tp_master_slave = -1;
|
|
|
|
static int hf_m2tp_info_string = -1;
|
|
|
|
static int hf_m2tp_heartbeat_data = -1;
|
|
|
|
static int hf_m2tp_diagnostic_info = -1;
|
|
|
|
static int hf_m2tp_error_code = -1;
|
|
|
|
static int hf_m2tp_reason = -1;
|
|
|
|
|
|
|
|
/* Initialize the subtree pointers */
|
|
|
|
static gint ett_m2tp = -1;
|
|
|
|
static gint ett_m2tp_parameter = -1;
|
|
|
|
|
|
|
|
static dissector_handle_t mtp2_handle;
|
|
|
|
static int mtp2_proto_id;
|
|
|
|
|
2002-08-28 21:04:11 +00:00
|
|
|
static guint
|
2001-12-16 22:30:11 +00:00
|
|
|
nr_of_padding_bytes (guint length)
|
|
|
|
{
|
|
|
|
guint remainder;
|
|
|
|
|
|
|
|
remainder = length % 4;
|
|
|
|
|
|
|
|
if (remainder == 0)
|
|
|
|
return 0;
|
|
|
|
else
|
|
|
|
return 4 - remainder;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Common Header */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m2tp_tree)
|
|
|
|
{
|
|
|
|
guint8 version, reserved, message_class, message_type;
|
|
|
|
guint32 message_length;
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
/* Extract the common header */
|
|
|
|
version = tvb_get_guint8(common_header_tvb, VERSION_OFFSET);
|
|
|
|
reserved = tvb_get_guint8(common_header_tvb, RESERVED_OFFSET);
|
|
|
|
message_class = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
|
|
|
|
message_type = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
|
|
|
|
message_length = tvb_get_ntohl (common_header_tvb, MESSAGE_LENGTH_OFFSET);
|
|
|
|
|
|
|
|
if ((check_col(pinfo->cinfo, COL_INFO)) && (message_class != MESSAGE_CLASS_DATA_MESSAGE)){
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO,
|
|
|
|
val_to_str(message_class * 256 + message_type, m2tp_message_class_type_acro_values, "reserved"));
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, " ");
|
|
|
|
};
|
|
|
|
|
|
|
|
if (m2tp_tree) {
|
|
|
|
/* add the components of the common header to the protocol tree */
|
|
|
|
proto_tree_add_uint(m2tp_tree, hf_m2tp_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, version);
|
|
|
|
proto_tree_add_uint(m2tp_tree, hf_m2tp_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, reserved);
|
|
|
|
proto_tree_add_uint(m2tp_tree, hf_m2tp_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, message_class);
|
2002-08-28 21:04:11 +00:00
|
|
|
proto_tree_add_uint_format(m2tp_tree, hf_m2tp_message_type,
|
2001-12-16 22:30:11 +00:00
|
|
|
common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH,
|
|
|
|
message_type, "Message type: %u (%s)",
|
|
|
|
message_type, val_to_str(message_class * 256 + message_type, m2tp_message_class_type_values, "reserved"));
|
|
|
|
proto_tree_add_uint(m2tp_tree, hf_m2tp_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, message_length);
|
|
|
|
};
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Interface Identifier */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint32 parameter_value;
|
|
|
|
|
|
|
|
if (parameter_tree) {
|
|
|
|
parameter_value = tvb_get_ntohl(parameter_tvb, PARAMETER_VALUE_OFFSET);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_m2tp_interface_identifier, parameter_tvb, INTERFACE_IDENTIFIER_OFFSET, INTERFACE_IDENTIFIER_LENGTH, parameter_value);
|
|
|
|
proto_item_set_text(parameter_item, "Interface Identifier (%u)", parameter_value);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Master Slave Indicator */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_master_slave_parameter (tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint32 parameter_value;
|
|
|
|
|
|
|
|
if (parameter_tree) {
|
|
|
|
parameter_value = tvb_get_ntohl(parameter_tvb, PARAMETER_VALUE_OFFSET);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_m2tp_master_slave, parameter_tvb, MASTER_SLAVE_OFFSET, MASTER_SLAVE_LENGTH, parameter_value);
|
|
|
|
proto_item_set_text(parameter_item, "Master Slave Indicator (%s)", val_to_str(parameter_value, m2tp_mode_values, "unknown"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* M2tp User Identifier */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_user_identifier_parameter (tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint32 parameter_value;
|
|
|
|
|
|
|
|
if (parameter_tree) {
|
|
|
|
parameter_value = tvb_get_ntohl(parameter_tvb, PARAMETER_VALUE_OFFSET);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_m2tp_user, parameter_tvb, M2TP_USER_OFFSET, M2TP_USER_LENGTH, parameter_value);
|
|
|
|
proto_item_set_text(parameter_item, "M2TP User Identifier (%u)", parameter_value);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Info String */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_info_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint16 length, info_string_length;
|
2002-12-02 23:43:30 +00:00
|
|
|
const char *info_string;
|
2001-12-16 22:30:11 +00:00
|
|
|
|
|
|
|
if (parameter_tree) {
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
info_string_length = length - PARAMETER_HEADER_LENGTH;
|
2002-12-02 23:43:30 +00:00
|
|
|
info_string = (const char *)tvb_get_ptr(parameter_tvb, INFO_STRING_OFFSET, info_string_length);
|
2001-12-16 22:30:11 +00:00
|
|
|
proto_tree_add_string(parameter_tree, hf_m2tp_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, info_string);
|
|
|
|
proto_item_set_text(parameter_item, "Info String (%.*s)", info_string_length, info_string);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Diagnostic Information */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint16 length, diagnostic_info_length;
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
if (parameter_tree) {
|
2002-08-28 21:04:11 +00:00
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
2001-12-16 22:30:11 +00:00
|
|
|
diagnostic_info_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
proto_tree_add_bytes(parameter_tree, hf_m2tp_diagnostic_info, parameter_tvb, PARAMETER_VALUE_OFFSET, diagnostic_info_length,
|
|
|
|
tvb_get_ptr(parameter_tvb, PARAMETER_VALUE_OFFSET, diagnostic_info_length));
|
|
|
|
proto_item_set_text(parameter_item, "Diagnostic information (%u byte%s)", diagnostic_info_length, plurality(diagnostic_info_length, "", "s"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Heartbeat Data */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint16 length, heartbeat_data_length;
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
if (parameter_tree) {
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
heartbeat_data_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
proto_tree_add_bytes(parameter_tree, hf_m2tp_heartbeat_data, parameter_tvb, PARAMETER_VALUE_OFFSET, heartbeat_data_length,
|
|
|
|
tvb_get_ptr(parameter_tvb, PARAMETER_VALUE_OFFSET, heartbeat_data_length));
|
|
|
|
proto_item_set_text(parameter_item, "Heartbeat data (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reason Parameter */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint32 reason;
|
|
|
|
|
|
|
|
if (parameter_tree) {
|
|
|
|
reason = tvb_get_ntohl(parameter_tvb, REASON_OFFSET);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_m2tp_reason, parameter_tvb, REASON_OFFSET, REASON_LENGTH, reason);
|
|
|
|
proto_item_set_text(parameter_item, "Reason parameter (%s)", val_to_str(reason, m2tp_reason_code_values, "unknown"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Error Code */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint32 error_code;
|
|
|
|
|
|
|
|
if (parameter_tree) {
|
|
|
|
error_code = tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_m2tp_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, error_code);
|
|
|
|
proto_item_set_text(parameter_item, "Error code parameter (%s)", val_to_str(error_code, m2tp_error_code_values, "unknown"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Protocol Data */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_protocol_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item, packet_info *pinfo, proto_item *m2tp_item, proto_tree *tree)
|
|
|
|
{
|
|
|
|
guint16 length, protocol_data_length, padding_length;
|
|
|
|
tvbuff_t *mtp2_tvb;
|
|
|
|
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
padding_length = nr_of_padding_bytes(length);
|
|
|
|
protocol_data_length = length - PARAMETER_HEADER_LENGTH;
|
|
|
|
|
|
|
|
mtp2_tvb = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, protocol_data_length, protocol_data_length);
|
|
|
|
call_dissector(mtp2_handle, mtp2_tvb, pinfo, tree);
|
|
|
|
|
|
|
|
if ((check_col(pinfo->cinfo, COL_INFO)) && (!proto_is_protocol_enabled(mtp2_proto_id)))
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, "DATA");
|
|
|
|
|
|
|
|
if (parameter_tree) {
|
|
|
|
proto_item_set_text(parameter_item, "Protocol data (SS7 message)");
|
|
|
|
proto_item_set_len(parameter_item, proto_item_get_len(parameter_item) - protocol_data_length - padding_length);
|
|
|
|
proto_item_set_len(m2tp_item, proto_item_get_len(m2tp_item) - protocol_data_length - padding_length);
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Unknown Parameter */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
|
|
|
|
{
|
|
|
|
guint16 tag, length, parameter_value_length;
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
if (parameter_tree) {
|
|
|
|
tag = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
parameter_value_length = length - PARAMETER_HEADER_LENGTH;
|
2002-08-28 21:04:11 +00:00
|
|
|
proto_tree_add_bytes(parameter_tree, hf_m2tp_parameter_value,
|
2001-12-16 22:30:11 +00:00
|
|
|
parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length,
|
|
|
|
tvb_get_ptr(parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length));
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
proto_item_set_text(parameter_item, "Parameter with tag %u and %u byte%s value", tag, parameter_value_length, plurality(parameter_value_length, "", "s"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* M2TP Parameter */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *m2tp_tree, proto_item *m2tp_item, proto_tree *tree)
|
|
|
|
{
|
|
|
|
guint16 tag, length, padding_length, total_length;
|
|
|
|
proto_item *parameter_item = NULL;
|
|
|
|
proto_tree *parameter_tree = NULL;
|
|
|
|
|
|
|
|
/* extract tag and length from the parameter */
|
|
|
|
tag = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
|
|
|
|
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
|
|
|
|
|
|
|
|
/* calculate padding and total length */
|
|
|
|
padding_length = nr_of_padding_bytes(length);
|
|
|
|
total_length = length + padding_length;
|
|
|
|
|
|
|
|
if (tree) {
|
|
|
|
/* create proto_tree stuff */
|
|
|
|
parameter_item = proto_tree_add_text(m2tp_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, total_length, "Incomplete parameter");
|
|
|
|
parameter_tree = proto_item_add_subtree(parameter_item, ett_m2tp_parameter);
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
/* add tag and length to the m2tp tree */
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_m2tp_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET, PARAMETER_TAG_LENGTH, tag);
|
|
|
|
proto_tree_add_uint(parameter_tree, hf_m2tp_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, length);
|
|
|
|
}
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
switch(tag) {
|
|
|
|
case INTERFACE_IDENTIFIER_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case MASTER_SLAVE_INDICATOR_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_master_slave_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case M2TP_USER_IDENTIFIER_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_user_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case INFO_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_info_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case HEARTBEAT_DATA_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case REASON_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case ERROR_CODE_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
case PROTOCOL_DATA_PARAMETER_TAG:
|
|
|
|
dissect_m2tp_protocol_data_parameter(parameter_tvb, parameter_tree, parameter_item, pinfo, m2tp_item, tree);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
dissect_m2tp_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
|
|
|
|
break;
|
|
|
|
};
|
|
|
|
|
|
|
|
if ((parameter_tree) && (padding_length > 0))
|
2002-08-28 21:04:11 +00:00
|
|
|
proto_tree_add_bytes(parameter_tree, hf_m2tp_parameter_padding,
|
2001-12-16 22:30:11 +00:00
|
|
|
parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length,
|
|
|
|
tvb_get_ptr(parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* M2TP Message */
|
|
|
|
static void
|
|
|
|
dissect_m2tp_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2tp_item, proto_tree *m2tp_tree, proto_tree *tree)
|
|
|
|
{
|
|
|
|
gint offset, length, padding_length, total_length;
|
|
|
|
tvbuff_t *common_header_tvb, *parameter_tvb;
|
|
|
|
|
|
|
|
offset = 0;
|
|
|
|
|
|
|
|
/* extract and process the common header */
|
|
|
|
common_header_tvb = tvb_new_subset(message_tvb, offset, COMMON_HEADER_LENGTH, COMMON_HEADER_LENGTH);
|
|
|
|
dissect_m2tp_common_header(common_header_tvb, pinfo, m2tp_tree);
|
|
|
|
offset += COMMON_HEADER_LENGTH;
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
/* extract zero or more parameters and process them individually */
|
2002-01-24 09:20:54 +00:00
|
|
|
while(tvb_reported_length_remaining(message_tvb, offset)) {
|
2001-12-16 22:30:11 +00:00
|
|
|
length = tvb_get_ntohs(message_tvb, offset + PARAMETER_LENGTH_OFFSET);
|
|
|
|
padding_length = nr_of_padding_bytes(length);
|
|
|
|
total_length = length + padding_length;
|
|
|
|
/* create a tvb for the parameter including the padding bytes */
|
|
|
|
parameter_tvb = tvb_new_subset(message_tvb, offset, total_length, total_length);
|
2002-08-28 21:04:11 +00:00
|
|
|
dissect_m2tp_parameter(parameter_tvb, pinfo, m2tp_tree, m2tp_item, tree);
|
2001-12-16 22:30:11 +00:00
|
|
|
/* get rid of the handled parameter */
|
|
|
|
offset += total_length;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* M2tp */
|
|
|
|
static void
|
|
|
|
dissect_m2tp(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
|
|
|
|
{
|
|
|
|
proto_item *m2tp_item;
|
|
|
|
proto_tree *m2tp_tree;
|
|
|
|
|
|
|
|
/* make entry in the Protocol column on summary display */
|
2002-08-28 21:04:11 +00:00
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
2001-12-16 22:30:11 +00:00
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2TP");
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
/* In the interest of speed, if "tree" is NULL, don't do any work not
|
|
|
|
necessary to generate protocol tree items. */
|
|
|
|
if (tree) {
|
|
|
|
/* create the m2tp protocol tree */
|
2002-01-24 09:20:54 +00:00
|
|
|
m2tp_item = proto_tree_add_item(tree, proto_m2tp, message_tvb, 0, -1, FALSE);
|
2001-12-16 22:30:11 +00:00
|
|
|
m2tp_tree = proto_item_add_subtree(m2tp_item, ett_m2tp);
|
|
|
|
} else {
|
|
|
|
m2tp_item = NULL;
|
|
|
|
m2tp_tree = NULL;
|
|
|
|
};
|
|
|
|
/* dissect the message */
|
|
|
|
dissect_m2tp_message(message_tvb, pinfo, m2tp_item, m2tp_tree, tree);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Register the protocol with Ethereal */
|
|
|
|
void
|
|
|
|
proto_register_m2tp(void)
|
2002-08-28 21:04:11 +00:00
|
|
|
{
|
2001-12-16 22:30:11 +00:00
|
|
|
|
|
|
|
/* Setup list of header fields */
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_m2tp_version,
|
|
|
|
{ "Version", "m2tp.version",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT8, BASE_DEC, VALS(m2tp_protocol_version_values), 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
|
|
|
},
|
|
|
|
{ &hf_m2tp_reserved,
|
|
|
|
{ "Reserved", "m2tp.reserved",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_message_class,
|
|
|
|
{ "Message class", "m2tp.message_class",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT8, BASE_DEC, VALS(m2tp_message_class_values), 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
|
|
|
},
|
|
|
|
{ &hf_m2tp_message_type,
|
|
|
|
{ "Message Type", "m2tp.message_type",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
|
|
|
},
|
|
|
|
{ &hf_m2tp_message_length,
|
|
|
|
{ "Message length", "m2tp.message_length",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_parameter_tag,
|
|
|
|
{ "Parameter Tag", "m2tp.parameter_tag",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT16, BASE_DEC, VALS(m2tp_parameter_tag_values), 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
|
|
|
},
|
|
|
|
{ &hf_m2tp_parameter_length,
|
|
|
|
{ "Parameter length", "m2tp.parameter_length",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_parameter_value,
|
|
|
|
{ "Parameter Value", "m2tp.parameter_value",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_m2tp_parameter_padding,
|
|
|
|
{ "Padding", "m2tp.parameter_padding",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL }
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_interface_identifier,
|
|
|
|
{ "Interface Identifier", "m2tp.interface_identifier",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_user,
|
|
|
|
{ "M2tp User Identifier", "m2tp.user_identifier",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT32, BASE_DEC, VALS(m2tp_user_identifier_values), 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_master_slave,
|
|
|
|
{ "Master Slave Indicator", "m2tp.master_slave",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT32, BASE_DEC, VALS(m2tp_mode_values), 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_info_string,
|
|
|
|
{ "Info string", "m2tp.info_string",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_STRING, BASE_DEC, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_diagnostic_info,
|
|
|
|
{ "Diagnostic information", "m2tp.diagnostic_info",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_m2tp_heartbeat_data,
|
|
|
|
{ "Heartbeat data", "m2tp.heartbeat_data",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL }
|
|
|
|
},
|
|
|
|
{ &hf_m2tp_error_code,
|
|
|
|
{ "Error code", "m2tp.error_code",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT32, BASE_DEC, VALS(m2tp_error_code_values), 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
{ &hf_m2tp_reason,
|
|
|
|
{ "Reason", "m2tp.reason",
|
2002-08-28 21:04:11 +00:00
|
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
2001-12-16 22:30:11 +00:00
|
|
|
"", HFILL}
|
2002-08-28 21:04:11 +00:00
|
|
|
},
|
2001-12-16 22:30:11 +00:00
|
|
|
};
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
|
|
&ett_m2tp,
|
|
|
|
&ett_m2tp_parameter,
|
|
|
|
};
|
2002-08-28 21:04:11 +00:00
|
|
|
|
2001-12-16 22:30:11 +00:00
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_m2tp = proto_register_protocol("MTP 2 Transparent Proxy", "M2TP", "m2tp");
|
|
|
|
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array(proto_m2tp, hf, array_length(hf));
|
|
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
};
|
|
|
|
|
|
|
|
void
|
|
|
|
proto_reg_handoff_m2tp(void)
|
|
|
|
{
|
|
|
|
dissector_handle_t m2tp_handle;
|
|
|
|
mtp2_handle = find_dissector("mtp2");
|
|
|
|
mtp2_proto_id = proto_get_id_by_filter_name("mtp2");
|
|
|
|
m2tp_handle = create_dissector_handle(dissect_m2tp, proto_m2tp);
|
2003-01-14 23:53:40 +00:00
|
|
|
dissector_add("sctp.ppi", M2TP_PAYLOAD_PROTOCOL_ID, m2tp_handle);
|
2001-12-16 22:30:11 +00:00
|
|
|
dissector_add("sctp.port", SCTP_PORT_M2TP, m2tp_handle);
|
|
|
|
}
|