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wireshark/packet-m3ua.c
Guy Harris 32d63ecb30 Remove more "CHECK_DISPLAY_AS_DATA()" calls and "pinfo->current_proto =" 
statements.

Move the setting of the Protocol column in various dissectors before
anything is fetched from the packet, and also clear the Info column at
that point in those and some other dissectors, so that if an exception
is thrown, the columns don't reflect the previous protocol.

"Tvbuffify" the Mobile IP dissector (it took old-style arguments, and
then converted them into tvbuff arguments, so there wasn't much to do,
other than to fix references to "fd" to refer to "pinfo->fd").

In the SCTP dissector, refer to the port type and source and destination
ports through "pinfo" rather than through the global "pi", as it's a
tvbuffified dissector.

In the SMTP and Time Protocol dissectors, use "pinfo->match_port" rather
than "TCP_PORT_SMTP" when checking whether the packet is a request or
reply, just in case somebody makes a non-standard port be dissected as
SMTP or Time.  (Also, remove a bogus comment from the Time dissector; it
was probably cut-and-pasted from the TFTP dissector.)

svn path=/trunk/; revision=2938
2001-01-25 06:14:14 +00:00

972 lines
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/* packet-m3ua.c
* Routines for MTP3 User Adaptation Layer dissection
* It is hopefully (needs testing) compilant to
* http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-05.txt
* To do: - clean up the code
* - provide better handling of length parameters
* - provide good information in summary window
*
* Copyright 2000, Michael Tüxen <Michael.Tuexen@icn.siemens.de>
*
* $Id: packet-m3ua.c,v 1.4 2001/01/25 06:14:14 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@unicom.net>
* Copyright 1998 Gerald Combs
*
* Copied from README.developer
*
* 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 <stdio.h>
#include <stdlib.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#include <string.h>
#include <glib.h>
#ifdef NEED_SNPRINTF_H
# include "snprintf.h"
#endif
#include "packet.h"
#include "packet-ip.h"
#define SCTP_PORT_M3UA 2905
#define M3UA_PAYLOAD_PROTO_ID 3
#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 NETWORK_APPEARANCE_PARAMETER_TAG 1
#define PROTOCOL_DATA_PARAMETER_TAG 3
#define INFO_PARAMETER_TAG 4
#define AFFECTED_DESTINATIONS_PARAMETER_TAG 5
#define ROUTING_CONTEXT_PARAMETER_TAG 6
#define DIAGNOSTIC_INFORMATION_PARAMETER_TAG 7
#define HEARTBEAT_DATA_PARAMETER_TAG 8
#define USER_CAUSE_PARAMETER_TAG 9
#define REASON_PARAMETER_TAG 10
#define TRAFFIC_MODE_TYPE_PARAMETER_TAG 11
#define ERROR_CODE_PARAMETER_TAG 12
#define STATUS_TYPE_PARAMETER_TAG 13
#define CONGESTION_INDICATION_PARAMETER_TAG 14
static const value_string m3ua_parameter_tag_values[] = {
{ NETWORK_APPEARANCE_PARAMETER_TAG, "Network appearance" },
{ PROTOCOL_DATA_PARAMETER_TAG, "Protocol data" },
{ INFO_PARAMETER_TAG, "Info" },
{ AFFECTED_DESTINATIONS_PARAMETER_TAG, "Affected destinations" },
{ ROUTING_CONTEXT_PARAMETER_TAG, "Routing context" },
{ DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
{ HEARTBEAT_DATA_PARAMETER_TAG, "Heartbeat data" },
{ USER_CAUSE_PARAMETER_TAG, "User / Cause" },
{ REASON_PARAMETER_TAG, "Reason" },
{ TRAFFIC_MODE_TYPE_PARAMETER_TAG, "Traffic mode type" },
{ ERROR_CODE_PARAMETER_TAG, "Error code" },
{ STATUS_TYPE_PARAMETER_TAG, "Status type" },
{ CONGESTION_INDICATION_PARAMETER_TAG, "Congestion Indication" },
{ 0, NULL } };
#define PROTOCOL_VERSION_RELEASE_1 1
static const value_string m3ua_protocol_version_values[] = {
{ PROTOCOL_VERSION_RELEASE_1, "Release 1" },
{ 0, NULL } };
#define MESSAGE_CLASS_MGMT_MESSAGE 0
#define MESSAGE_CLASS_TFER_MESSAGE 1
#define MESSAGE_CLASS_SSNM_MESSAGE 2
#define MESSAGE_CLASS_ASPSM_MESSAGE 3
#define MESSAGE_CLASS_ASPTM_MESSAGE 4
static const value_string m3ua_message_class_values[] = {
{ MESSAGE_CLASS_MGMT_MESSAGE, "Management messages" },
{ MESSAGE_CLASS_TFER_MESSAGE, "Transfer messages" },
{ MESSAGE_CLASS_SSNM_MESSAGE, "SS7 signalling network management messages" },
{ MESSAGE_CLASS_ASPSM_MESSAGE, "ASP state maintenance messages" },
{ MESSAGE_CLASS_ASPTM_MESSAGE, "ASP traffic maintenance messages" },
{ 0, NULL } };
#define MESSAGE_TYPE_ERR 0
#define MESSAGE_TYPE_NTFY 1
#define MESSAGE_TYPE_DATA 1
#define MESSAGE_TYPE_DUNA 1
#define MESSAGE_TYPE_DAVA 2
#define MESSAGE_TYPE_DAUD 3
#define MESSAGE_TYPE_SCON 4
#define MESSAGE_TYPE_DUPU 5
#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
#define MESSAGE_TYPE_ACTIVE 1
#define MESSAGE_TYPE_INACTIVE 2
#define MESSAGE_TYPE_ACTIVE_ACK 3
#define MESSAGE_TYPE_INACTIVE_ACK 4
static const value_string m3ua_message_class_type_values[] = {
{ MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "Error (ERR)" },
{ MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "Notify (NTFY)" },
{ MESSAGE_CLASS_TFER_MESSAGE * 256 + MESSAGE_TYPE_DATA, "Payload data (DATA)" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DUNA, "Destination unavailable (DUNA)" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DAVA, "Destination available (DAVA)" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DAUD, "Destination state audit (DAUD)" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_SCON, "SS7 Network congestion state (SCON)" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DUPU, "Destination userpart unavailable (DUPU)" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP up (UP)" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP down (DOWN)" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "Heartbeat (BEAT)" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP up ack (UP ACK)" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP down ack (DOWN ACK)" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "Heartbeat ack (BEAT ACK)" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP active (ACTIVE)" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP inactive (INACTIVE)" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP active ack (ACTIVE ACK)" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (INACTIVE ACK)" },
{ 0, NULL } };
static const value_string m3ua_message_class_type_acro_values[] = {
{ MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "ERR" },
{ MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "NTFY" },
{ MESSAGE_CLASS_TFER_MESSAGE * 256 + MESSAGE_TYPE_DATA, "DATA" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DUNA, "DUNA" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DAVA, "DAVA" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DAUD, "DAUD" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_SCON, "SCON" },
{ MESSAGE_CLASS_SSNM_MESSAGE * 256 + MESSAGE_TYPE_DUPU, "DUPU" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP_UP" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP_DOWN" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "BEAT" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP_UP_ACK" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP_DOWN_ACK" },
{ MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "BEAT_ACK" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP_ACTIVE" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP_INACTIVE" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP_ACTIVE_ACK" },
{ MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
{ 0, NULL } };
#define NETWORK_APPEARANCE_LENGTH 4
#define NETWORK_APPEARANCE_OFFSET PARAMETER_VALUE_OFFSET
#define PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
#define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
#define INVALID_VERSION_ERROR_CODE 1
#define INVALID_NETWORK_APPEARANCE_ERROR_CODE 2
#define UNSUPPORTED_MESSAGE_TYPE_ERROR_CODE 3
#define INVALID_MESSAGE_TYPE_ERROR_CODE 4
#define INVALID_TRAFFIC_HANDLING_MODE_ERROR_CODE 5
#define UNEXPECTED_MESSAGE_ERROR_CODE 6
#define PROTOCOL_ERROR_ERROR_CODE 7
#define INVALID_ROUTING_CONTEXT_ERROR_CODE 8
static const value_string m3ua_error_code_values[] = {
{ INVALID_VERSION_ERROR_CODE, "Invalid version" },
{ INVALID_NETWORK_APPEARANCE_ERROR_CODE, "Invalid network appearance" },
{ UNSUPPORTED_MESSAGE_TYPE_ERROR_CODE, "Unsupported message type" },
{ INVALID_MESSAGE_TYPE_ERROR_CODE, "Invalid message type" },
{ INVALID_TRAFFIC_HANDLING_MODE_ERROR_CODE, "Invalid traffic handling mode" },
{ UNEXPECTED_MESSAGE_ERROR_CODE, "Unexpected message" },
{ PROTOCOL_ERROR_ERROR_CODE, "Protocol error" },
{ INVALID_ROUTING_CONTEXT_ERROR_CODE, "Invalid routing contexted" },
{ 0, NULL } };
#define ERROR_CODE_LENGTH 4
#define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
#define AS_STATE_CHANGE_TYPE 1
#define OTHER_TYPE 2
static const value_string m3ua_status_type_values[] = {
{ AS_STATE_CHANGE_TYPE, "Application server state change" },
{ OTHER_TYPE, "Other" },
{ 0, NULL } };
#define RESERVED_INFO 1
#define AS_INACTIVE_INFO 2
#define AS_ACTIVE_INFO 3
#define AS_PENDING_INFO 4
#define INSUFFICIENT_ASP_RES_INFO 1
#define ALTERNATE_ASP_ACTIVE_INFO 2
static const value_string m3ua_status_type_info_values[] = {
{ AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO, "Reserved" },
{ AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO, "Application server inactive" },
{ AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO, "Application server active" },
{ AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO, "Application server pending" },
{ OTHER_TYPE * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
{ OTHER_TYPE * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
{0, NULL } };
#define STATUS_TYPE_LENGTH 2
#define STATUS_INFO_LENGTH 2
#define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
#define STATUS_INFO_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
#define UNKNOWN_UNAVAIL_CAUSE 0
#define UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE 1
#define INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE 2
static const value_string m3ua_unavailability_cause_values[] = {
{ UNKNOWN_UNAVAIL_CAUSE, "Unknown" },
{ UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE, "Unequipped remote user" },
{ INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE, "Inaccessable remote user" },
{0, NULL } };
#define RESERVED_0_USER_ID 0
#define RESERVED_1_USER_ID 1
#define RESERVED_2_USER_ID 2
#define SCCP_USER_ID 3
#define TUP_USER_ID 4
#define ISUP_USER_ID 5
#define RESERVED_6_USER_ID 6
#define RESERVED_7_USER_ID 7
#define RESERVED_8_USER_ID 8
#define BROADBAND_ISUP_USER_ID 9
#define SATELLITE_ISUP_USER_ID 10
static const value_string m3ua_user_identity_values[] = {
{ RESERVED_0_USER_ID, "Reserved" },
{ RESERVED_1_USER_ID, "Reserved" },
{ RESERVED_2_USER_ID, "Reserved" },
{ SCCP_USER_ID, "SCCP" },
{ TUP_USER_ID, "TUP" },
{ ISUP_USER_ID, "ISUP" },
{ RESERVED_6_USER_ID, "Reserved" },
{ RESERVED_7_USER_ID, "Reserved" },
{ RESERVED_8_USER_ID, "Reserved" },
{ BROADBAND_ISUP_USER_ID, "Broadband ISUP" },
{ SATELLITE_ISUP_USER_ID, "Satellite ISUP" },
{0, NULL } };
#define CAUSE_LENGTH 2
#define USER_LENGTH 2
#define CAUSE_OFFSET PARAMETER_VALUE_OFFSET
#define USER_OFFSET (CAUSE_OFFSET + CAUSE_LENGTH)
#define UNSPECIFIED_REASON 0
#define USER_UNAVAILABLE_REASON 1
#define MANAGEMENT_BLOCKING_REASON 2
static const value_string m3ua_reason_values[] = {
{ UNSPECIFIED_REASON, "Unspecified" },
{ USER_UNAVAILABLE_REASON, "User unavailable" },
{ MANAGEMENT_BLOCKING_REASON, "Management blocking" },
{0, NULL } };
#define REASON_LENGTH 4
#define REASON_OFFSET PARAMETER_VALUE_OFFSET
#define OVER_RIDE_TYPE 1
#define LOAD_SHARE_TYPE 2
#define OVER_RIDE_STANDBY_TYPE 3
#define LOAD_SHARE_STANDBY_TYPE 4
static const value_string m3ua_traffic_mode_type_values[] = {
{ OVER_RIDE_TYPE , "Over-ride" },
{ LOAD_SHARE_TYPE, "Load-share" },
{ OVER_RIDE_STANDBY_TYPE, "Over-ride (standby)" },
{ LOAD_SHARE_STANDBY_TYPE, "Load-share (standby)" },
{0, NULL } };
#define TRAFFIC_MODE_TYPE_LENGTH 4
#define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
#define ROUTING_CONTEXT_LENGTH 4
#define AFFECTED_DESTINATION_LENGTH 4
#define AFFECTED_MASK_LENGTH 1
#define AFFECTED_DPC_LENGTH 3
#define AFFECTED_MASK_OFFSET 0
#define AFFECTED_DPC_OFFSET (AFFECTED_MASK_OFFSET + AFFECTED_MASK_LENGTH)
#define NO_CONGESTION_LEVEL 0
#define CONGESTION_LEVEL_1_LEVEL 1
#define CONGESTION_LEVEL_2_LEVEL 2
#define CONGESTION_LEVEL_3_LEVEL 3
static const value_string m3ua_congestion_level_values[] = {
{ NO_CONGESTION_LEVEL, "No congestion or undefined" },
{ CONGESTION_LEVEL_1_LEVEL, "Congestion level 1" },
{ CONGESTION_LEVEL_2_LEVEL, "Congestion level 2" },
{ CONGESTION_LEVEL_3_LEVEL, "Congestion level 3" },
{0, NULL } };
#define CONG_IND_RESERVED_LENGTH 3
#define CONG_IND_LEVEL_LENGTH 1
#define CONG_IND_RESERVED_OFFSET PARAMETER_VALUE_OFFSET
#define CONG_IND_LEVEL_OFFSET (CONG_IND_RESERVED_OFFSET + CONG_IND_RESERVED_LENGTH)
/* Initialize the protocol and registered fields */
static int proto_m3ua = -1;
static int hf_m3ua_version = -1;
static int hf_m3ua_reserved = -1;
static int hf_m3ua_message_class = -1;
static int hf_m3ua_message_type = -1;
static int hf_m3ua_message_length = -1;
static int hf_m3ua_parameter_tag = -1;
static int hf_m3ua_parameter_length = -1;
static int hf_m3ua_network_appearance = -1;
static int hf_m3ua_info_string = -1;
static int hf_m3ua_error_code = -1;
static int hf_m3ua_status_type = -1;
static int hf_m3ua_status_info = -1;
static int hf_m3ua_unavailability_cause = -1;
static int hf_m3ua_user_identity = -1;
static int hf_m3ua_reason = -1;
static int hf_m3ua_traffic_mode_type = -1;
static int hf_m3ua_routing_context = -1;
static int hf_m3ua_mask = -1;
static int hf_m3ua_dpc = -1;
static int hf_m3ua_congestion_level = -1;
/* Initialize the subtree pointers */
static gint ett_m3ua = -1;
static gint ett_m3ua_parameter = -1;
static gint ett_m3ua_affected_destination = -1;
static guint
nr_of_padding_bytes (guint length)
{
guint remainder;
remainder = length % 4;
if (remainder == 0)
return 0;
else
return 4 - remainder;
}
static void
dissect_m3ua_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
{
guint8 version, reserved, message_class, message_type;
guint32 message_length;
/* 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->fd, COL_INFO)) {
col_append_str(pinfo->fd, COL_INFO, val_to_str(message_class * 256 + message_type, m3ua_message_class_type_acro_values, "reserved"));
col_append_str(pinfo->fd, COL_INFO, " ");
};
if (m3ua_tree) {
/* add the components of the common header to the protocol tree */
proto_tree_add_uint_format(m3ua_tree, hf_m3ua_version,
common_header_tvb, VERSION_OFFSET, VERSION_LENGTH,
version, "Version: %u (%s)",
version, val_to_str(version, m3ua_protocol_version_values, "unknown"));
proto_tree_add_uint(m3ua_tree, hf_m3ua_reserved,
common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH,
reserved);
proto_tree_add_uint_format(m3ua_tree, hf_m3ua_message_class,
common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH,
message_class, "Message class: %u (%s)",
message_class, val_to_str(message_class, m3ua_message_class_values, "reserved"));
proto_tree_add_uint_format(m3ua_tree, hf_m3ua_message_type,
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, m3ua_message_class_type_values, "reserved"));
proto_tree_add_uint(m3ua_tree, hf_m3ua_message_length,
common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH,
message_length);
};
}
static void
dissect_m3ua_network_appearance_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint32 network_appearance;
network_appearance = tvb_get_ntohl(parameter_tvb, NETWORK_APPEARANCE_OFFSET);
proto_tree_add_uint(parameter_tree, hf_m3ua_network_appearance,
parameter_tvb, NETWORK_APPEARANCE_OFFSET, NETWORK_APPEARANCE_LENGTH,
network_appearance);
proto_item_set_text(parameter_item, "Network appearance: %u", network_appearance);
}
static void
dissect_m3ua_protocol_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 length, protocol_data_length;
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
protocol_data_length = length - PARAMETER_HEADER_LENGTH;
proto_tree_add_text(parameter_tree, parameter_tvb, PROTOCOL_DATA_OFFSET, protocol_data_length,
"Protocol data (%u byte%s)",
protocol_data_length, plurality(protocol_data_length, "", "s"));
proto_item_set_text(parameter_item, "Protocol data (SS7 message of %u byte%s)",
protocol_data_length, plurality(protocol_data_length, "", "s"));
}
static void
dissect_m3ua_info_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 length, info_string_length;
char *info_string;
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
info_string_length = length - PARAMETER_HEADER_LENGTH;
info_string = (char *)tvb_get_ptr(parameter_tvb, INFO_STRING_OFFSET, info_string_length);
proto_tree_add_string(parameter_tree, hf_m3ua_info_string,
parameter_tvb, INFO_STRING_OFFSET, info_string_length ,
info_string);
proto_item_set_text(parameter_item, "Info String (%s)", info_string);
}
static void
dissect_m3ua_affected_destinations_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint8 mask;
guint16 length, number_of_destinations, destination_number;
guint32 dpc;
gint destination_offset;
proto_item *destination_item;
proto_tree *destination_tree;
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
number_of_destinations= (length - PARAMETER_HEADER_LENGTH) / 4;
destination_offset = PARAMETER_VALUE_OFFSET;
for(destination_number=1; destination_number <= number_of_destinations; destination_number++) {
mask = tvb_get_guint8(parameter_tvb, destination_offset + AFFECTED_MASK_OFFSET);
dpc = tvb_get_ntoh24(parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET);
destination_item = proto_tree_add_text(parameter_tree, parameter_tvb, destination_offset, AFFECTED_DESTINATION_LENGTH,
"Affected destination");
destination_tree = proto_item_add_subtree(destination_item, ett_m3ua_affected_destination);
proto_tree_add_uint(destination_tree, hf_m3ua_mask,
parameter_tvb, destination_offset + AFFECTED_MASK_OFFSET, AFFECTED_MASK_LENGTH,
mask);
proto_tree_add_uint(destination_tree, hf_m3ua_dpc,
parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET, AFFECTED_DPC_LENGTH,
dpc);
destination_offset += AFFECTED_DESTINATION_LENGTH;
};
proto_item_set_text(parameter_item, "Affected destinations parameter (%u destination%s)",
number_of_destinations, plurality(number_of_destinations, "", "s"));
}
static void
dissect_m3ua_routing_context_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 length, number_of_contexts, context_number;
guint32 context;
gint context_offset;
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
number_of_contexts = (length - PARAMETER_HEADER_LENGTH) / 4;
context_offset = PARAMETER_VALUE_OFFSET;
for(context_number=1; context_number <= number_of_contexts; context_number++) {
context = tvb_get_ntohl(parameter_tvb, context_offset);
proto_tree_add_uint(parameter_tree, hf_m3ua_routing_context,
parameter_tvb, context_offset, ROUTING_CONTEXT_LENGTH,
context);
context_offset += ROUTING_CONTEXT_LENGTH;
};
proto_item_set_text(parameter_item, "Routing context parameter (%u context%s)",
number_of_contexts, plurality(number_of_contexts, "", "s"));
}
static void
dissect_m3ua_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 length, diagnostic_info_length;
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
diagnostic_info_length = length - PARAMETER_HEADER_LENGTH;
proto_tree_add_text(parameter_tree, parameter_tvb, PARAMETER_VALUE_OFFSET, diagnostic_info_length,
"Diagnostic information (%u byte%s)",
diagnostic_info_length, plurality(diagnostic_info_length, "", "s"));
proto_item_set_text(parameter_item, "Diagnostic information (%u byte%s)",
diagnostic_info_length, plurality(diagnostic_info_length, "", "s"));
}
static void
dissect_m3ua_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 length, heartbeat_data_length;
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
heartbeat_data_length = length - PARAMETER_HEADER_LENGTH;
proto_tree_add_text(parameter_tree, parameter_tvb, PARAMETER_VALUE_OFFSET, heartbeat_data_length,
"Heartbeat data (%u byte%s)",
heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
proto_item_set_text(parameter_item, "Heartbeat data (%u byte%s)",
heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
}
static void
dissect_m3ua_user_cause_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 cause, user;
cause = tvb_get_ntohs(parameter_tvb, CAUSE_OFFSET);
user = tvb_get_ntohs(parameter_tvb, USER_OFFSET);
proto_tree_add_uint_format(parameter_tree, hf_m3ua_unavailability_cause,
parameter_tvb, CAUSE_OFFSET, CAUSE_LENGTH,
cause, "Unavailability cause: %u (%s)",
cause, val_to_str(cause, m3ua_unavailability_cause_values, "unknown"));
proto_tree_add_uint_format(parameter_tree, hf_m3ua_user_identity,
parameter_tvb, USER_OFFSET, USER_LENGTH,
user, "User identity: %u (%s)",
user, val_to_str(user, m3ua_user_identity_values, "unknown"));
proto_item_set_text(parameter_item, "User / Cause parameter (%s: %s)",
val_to_str(user, m3ua_user_identity_values, "Unknown user"),
val_to_str(cause, m3ua_unavailability_cause_values, "unknown cause"));
}
static void
dissect_m3ua_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint32 reason;
reason = tvb_get_ntohl(parameter_tvb, REASON_OFFSET);
proto_tree_add_uint_format(parameter_tree, hf_m3ua_reason,
parameter_tvb, REASON_OFFSET, REASON_LENGTH,
reason, "Reason: %u (%s)",
reason, val_to_str(reason, m3ua_reason_values, "unknown"));
proto_item_set_text(parameter_item, "Reason parameter (%s)",
val_to_str(reason, m3ua_reason_values, "unknown"));
}
static void
dissect_m3ua_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint32 traffic_mode_type;
traffic_mode_type = tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET);
proto_tree_add_uint_format(parameter_tree, hf_m3ua_traffic_mode_type,
parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH,
traffic_mode_type, "Traffic mode type: %u (%s)",
traffic_mode_type, val_to_str(traffic_mode_type, m3ua_traffic_mode_type_values, "unknown"));
proto_item_set_text(parameter_item, "Traffic mode type parameter (%s)",
val_to_str(traffic_mode_type, m3ua_traffic_mode_type_values, "unknown"));
}
static void
dissect_m3ua_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint32 error_code;
error_code = tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET);
proto_tree_add_uint_format(parameter_tree, hf_m3ua_error_code,
parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH,
error_code, "Error code: %u (%s)",
error_code, val_to_str(error_code, m3ua_error_code_values, "unknown"));
proto_item_set_text(parameter_item, "Error code parameter (%s)",
val_to_str(error_code, m3ua_error_code_values, "unknown"));
}
static void
dissect_m3ua_status_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 status_type, status_info;
status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
proto_tree_add_uint_format(parameter_tree, hf_m3ua_status_type,
parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH,
status_type, "Status type: %u (%s)",
status_type, val_to_str(status_type, m3ua_status_type_values, "unknown"));
proto_tree_add_uint_format(parameter_tree, hf_m3ua_status_info,
parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH,
status_info, "Status info: %u (%s)",
status_info, val_to_str(status_type * 256 * 256 +
status_info, m3ua_status_type_info_values, "unknown"));
proto_item_set_text(parameter_item, "Status type / ID (%s)",
val_to_str(status_type * 256 * 256 +
status_info, m3ua_status_type_info_values, "unknown status information"));
}
static void
dissect_m3ua_congestion_indication_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint8 level;
level = tvb_get_guint8(parameter_tvb, CONG_IND_LEVEL_OFFSET);
proto_tree_add_text(parameter_tree, parameter_tvb, CONG_IND_RESERVED_OFFSET, CONG_IND_RESERVED_LENGTH,
"Reserved: %u byte%s",
CONG_IND_RESERVED_LENGTH, plurality(CONG_IND_RESERVED_LENGTH, "", "s"));
proto_tree_add_uint_format(parameter_tree, hf_m3ua_congestion_level,
parameter_tvb, CONG_IND_LEVEL_OFFSET, CONG_IND_LEVEL_LENGTH,
level, "Congestion level: %u (%s)",
level, val_to_str(level, m3ua_congestion_level_values, "unknown"));
proto_item_set_text(parameter_item, "Congestion indication (%s)",
val_to_str(level, m3ua_congestion_level_values, "unknown"));
}
static void
dissect_m3ua_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
{
guint16 tag, length, parameter_value_length;
tag = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
parameter_value_length = length - PARAMETER_HEADER_LENGTH;
proto_tree_add_text(parameter_tree, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length,
"Parameter value (%u byte%s)",
parameter_value_length, plurality(parameter_value_length, "", "s"));
proto_item_set_text(parameter_item, "Parameter with tag %u and %u byte%s value",
tag, parameter_value_length, plurality(parameter_value_length, "", "s"));
}
static void
dissect_m3ua_parameter(tvbuff_t *parameter_tvb, proto_tree *m3ua_tree)
{
guint16 tag, length, padding_length, total_length;
proto_item *parameter_item;
proto_tree *parameter_tree;
/* 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;
/* create proto_tree stuff */
parameter_item = proto_tree_add_text(m3ua_tree, parameter_tvb,
PARAMETER_HEADER_OFFSET, total_length, "Incomplete parameter");
parameter_tree = proto_item_add_subtree(parameter_item, ett_m3ua_parameter);
/* add tag and length to the m3ua tree */
proto_tree_add_uint_format(parameter_tree, hf_m3ua_parameter_tag,
parameter_tvb, PARAMETER_TAG_OFFSET, PARAMETER_TAG_LENGTH,
tag, "Identifier: %u (%s)",
tag, val_to_str(tag, m3ua_parameter_tag_values, "unknown"));
proto_tree_add_uint(parameter_tree, hf_m3ua_parameter_length,
parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH,
length);
switch(tag) {
case NETWORK_APPEARANCE_PARAMETER_TAG:
dissect_m3ua_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case PROTOCOL_DATA_PARAMETER_TAG:
dissect_m3ua_protocol_data_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case INFO_PARAMETER_TAG:
dissect_m3ua_info_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case AFFECTED_DESTINATIONS_PARAMETER_TAG:
dissect_m3ua_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case ROUTING_CONTEXT_PARAMETER_TAG:
dissect_m3ua_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
dissect_m3ua_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case HEARTBEAT_DATA_PARAMETER_TAG:
dissect_m3ua_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case USER_CAUSE_PARAMETER_TAG:
dissect_m3ua_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case REASON_PARAMETER_TAG:
dissect_m3ua_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
dissect_m3ua_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case ERROR_CODE_PARAMETER_TAG:
dissect_m3ua_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case STATUS_TYPE_PARAMETER_TAG:
dissect_m3ua_status_type_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
case CONGESTION_INDICATION_PARAMETER_TAG:
dissect_m3ua_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
default:
dissect_m3ua_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
break;
};
if (padding_length > 0)
proto_tree_add_text(parameter_tree, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length,
"Padding: %u byte%s",
padding_length, plurality(padding_length, "", "s"));
}
static void
dissect_m3ua_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *m3ua_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_m3ua_common_header(common_header_tvb, pinfo, m3ua_tree);
offset += COMMON_HEADER_LENGTH;
if (m3ua_tree) {
/* extract zero or more parameters and process them individually */
while(tvb_length_remaining(message_tvb, offset)) {
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);
dissect_m3ua_parameter(parameter_tvb, m3ua_tree);
/* get rid of the handled parameter */
offset += total_length;
}
}
}
static void
dissect_m3ua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *m3ua_item;
proto_tree *m3ua_tree;
/* make entry in the Protocol column on summary display */
if (check_col(pinfo->fd, COL_PROTOCOL))
col_set_str(pinfo->fd, COL_PROTOCOL, "M3UA");
/* 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 m3ua protocol tree */
m3ua_item = proto_tree_add_item(tree, proto_m3ua, message_tvb, 0, tvb_length(message_tvb), FALSE);
m3ua_tree = proto_item_add_subtree(m3ua_item, ett_m3ua);
} else {
m3ua_tree = NULL;
};
/* dissect the message */
dissect_m3ua_message(message_tvb, pinfo, m3ua_tree);
}
/* Register the protocol with Ethereal */
void
proto_register_m3ua(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_m3ua_version,
{ "Version", "m3ua.version",
FT_UINT8, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_reserved,
{ "Reserved", "m3ua.reserved",
FT_UINT8, BASE_HEX, NULL, 0x0,
""}
},
{ &hf_m3ua_message_class,
{ "Message class", "m3ua.message_class",
FT_UINT8, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_message_type,
{ "Message Type", "m3ua.message_type",
FT_UINT8, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_message_length,
{ "Message length", "m3ua.message_length",
FT_UINT32, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_parameter_tag,
{ "Parameter Tag", "m3ua.parameter_tag",
FT_UINT16, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_parameter_length,
{ "Parameter length", "m3ua.parameter_length",
FT_UINT16, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_network_appearance,
{ "Network appearance", "m3ua.network_appearance",
FT_UINT32, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_info_string,
{ "Info string", "m3ua.info_string",
FT_STRING, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_error_code,
{ "Error code", "m3ua.error_code",
FT_UINT32, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_status_type,
{ "Status type", "m3ua.status_type",
FT_UINT16, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_status_info,
{ "Status info", "m3ua.status_info",
FT_UINT16, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_unavailability_cause,
{ "Unavailability cause", "m3ua.unavailability_cause",
FT_UINT16, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_user_identity,
{ "User Identity", "m3ua.user_identity",
FT_UINT16, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_reason,
{ "Reason", "m3ua.reason",
FT_UINT32, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_traffic_mode_type,
{ "Traffic mode Type", "m3ua.traffic_mode_type",
FT_UINT32, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_routing_context,
{ "Routing context", "m3ua.routing_context",
FT_UINT32, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_mask,
{ "Mask", "m3ua.mask",
FT_UINT8, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_dpc,
{ "Affected DPC", "m3ua.affected_dpc",
FT_UINT24, BASE_DEC, NULL, 0x0,
""}
},
{ &hf_m3ua_congestion_level,
{ "Congestion level", "m3ua.congestion_level",
FT_UINT8, BASE_DEC, NULL, 0x0,
""}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_m3ua,
&ett_m3ua_parameter,
&ett_m3ua_affected_destination,
};
/* Register the protocol name and description */
proto_m3ua = proto_register_protocol("MTP 3 User Adaptation Layer",
"M3UA", "m3ua");
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_m3ua, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
};
void
proto_reg_handoff_m3ua(void)
{
dissector_add("sctp.ppi", M3UA_PAYLOAD_PROTO_ID, dissect_m3ua, proto_m3ua);
dissector_add("sctp.port", SCTP_PORT_M3UA, dissect_m3ua, proto_m3ua);
}
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