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wireshark/epan/dissectors/packet-m2pa.c

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/* packet-m2pa.c
* Routines for MTP2 Peer Adaptation Layer dissection
* It is hopefully (needs testing) compliant to
* https://tools.ietf.org/html/draft-ietf-sigtran-m2pa-02
* https://tools.ietf.org/html/draft-ietf-sigtran-m2pa-08
* https://tools.ietf.org/html/rfc4165
*
* Copyright 2001, 2002, Jeff Morriss <jeff.morriss.ws [AT] gmail.com>,
* updated by Michael Tuexen <tuexen [AT] fh-muenster.de>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* Copied from packet-m3ua.c
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/exceptions.h>
#include <epan/prefs.h>
#include <epan/sctpppids.h>
#include <epan/expert.h>
void proto_register_m2pa(void);
void proto_reg_handoff_m2pa(void);
#define SCTP_PORT_M2PA 3565
static int proto_m2pa = -1;
static module_t *m2pa_module;
static int hf_version = -1;
static int hf_spare = -1;
static int hf_v2_type = -1;
static int hf_v8_type = -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_v2_status = -1;
static int hf_v8_status = -1;
static int hf_status = -1;
static int hf_v2_li_spare = -1;
static int hf_v8_li_spare = -1;
static int hf_v2_li_prio = -1;
static int hf_v8_li_prio = -1;
static int hf_filler = -1;
static int hf_unknown_data = -1;
static int hf_pri_prio = -1;
static int hf_pri_spare = -1;
static int hf_undecode_data = -1;
static gint ett_m2pa = -1;
static gint ett_m2pa_li = -1;
static expert_field ei_undecode_data = EI_INIT;
static expert_field ei_length = EI_INIT;
static dissector_handle_t m2pa_handle;
static dissector_handle_t mtp3_handle;
typedef enum {
M2PA_V02 = 1,
M2PA_V08 = 2,
M2PA_RFC4165 = 3
} Version_Type;
static gint m2pa_version = M2PA_RFC4165;
#define VERSION_LENGTH 1
#define SPARE_LENGTH 1
#define CLASS_LENGTH 1
#define V2_TYPE_LENGTH 2
#define V8_TYPE_LENGTH 1
#define TYPE_LENGTH V8_TYPE_LENGTH
#define LENGTH_LENGTH 4
#define UNUSED_LENGTH 1
#define BSN_LENGTH 3
#define FSN_LENGTH 3
#define V2_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
V2_TYPE_LENGTH + LENGTH_LENGTH)
#define V8_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
CLASS_LENGTH + V8_TYPE_LENGTH + LENGTH_LENGTH + \
UNUSED_LENGTH + BSN_LENGTH + UNUSED_LENGTH + \
FSN_LENGTH)
#define HEADER_LENGTH V8_HEADER_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 V2_TYPE_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
#define V8_TYPE_OFFSET (CLASS_OFFSET + CLASS_LENGTH)
#define TYPE_OFFSET V8_TYPE_OFFSET
#define V8_LENGTH_OFFSET (V8_TYPE_OFFSET + V8_TYPE_LENGTH)
#define LENGTH_OFFSET V8_LENGTH_OFFSET
#define V2_LENGTH_OFFSET (V2_TYPE_OFFSET + V2_TYPE_LENGTH)
#define FIRST_UNUSED_OFFSET (V8_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)
static const value_string protocol_version_values[] = {
{ 1, "Release 1" },
{ 0, NULL } };
static const value_string message_class_values[] = {
{ 0xb, "M2PA" },
{ 0, NULL } };
#define V2_USER_DATA_TYPE 0x0601
#define V2_LINK_STATUS_TYPE 0x0602
static const value_string v2_message_type_values[] = {
{ V2_USER_DATA_TYPE, "User Data" },
{ V2_LINK_STATUS_TYPE, "Link Status" },
{ 0, NULL } };
#define V8_USER_DATA_TYPE 0x0001
#define V8_LINK_STATUS_TYPE 0x0002
static const value_string v8_message_type_values[] = {
{ V8_USER_DATA_TYPE, "User Data" },
{ V8_LINK_STATUS_TYPE, "Link Status" },
{ 0, NULL } };
#define USER_DATA_TYPE V8_USER_DATA_TYPE
#define LINK_STATUS_TYPE V8_LINK_STATUS_TYPE
static const value_string message_type_values[] = {
{ USER_DATA_TYPE, "User Data" },
{ LINK_STATUS_TYPE, "Link Status" },
{ 0, NULL } };
static void
dissect_v2_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
{
guint16 message_type;
message_type = tvb_get_ntohs(header_tvb, V2_TYPE_OFFSET);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v2_message_type_values, "reserved"));
proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_v2_type, header_tvb, V2_TYPE_OFFSET, V2_TYPE_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V2_LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
}
static void
dissect_v8_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
{
guint8 message_type;
message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v8_message_type_values, "Unknown"));
proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_v8_type, header_tvb, V8_TYPE_OFFSET, V8_TYPE_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V8_LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, ENC_BIG_ENDIAN);
}
static void
dissect_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
{
guint8 message_type;
message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v8_message_type_values, "Unknown"));
proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_type, header_tvb, TYPE_OFFSET, TYPE_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_length, header_tvb, LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, ENC_BIG_ENDIAN);
}
#define LI_OFFSET 0
#define LI_LENGTH 1
#define MTP3_OFFSET (LI_OFFSET + LI_LENGTH)
#define V2_LI_SPARE_MASK 0xfc
#define V2_LI_PRIORITY_MASK 0x3
static void
dissect_v2_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
{
proto_tree *m2pa_li_tree;
tvbuff_t *payload_tvb;
if (tvb_reported_length(message_data_tvb) > 0) {
m2pa_li_tree = proto_tree_add_subtree(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, ett_m2pa_li, NULL, "Length Indicator");
proto_tree_add_item(m2pa_li_tree, hf_v2_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_li_tree, hf_v2_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
/* Re-adjust length of M2PA item since it will be dissected as MTP3 */
proto_item_set_len(m2pa_item, V2_HEADER_LENGTH + LI_LENGTH);
}
payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
}
#define V8_LI_SPARE_MASK 0x3f
#define V8_LI_PRIORITY_MASK 0xc0
static void
dissect_v8_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
{
proto_tree *m2pa_li_tree;
tvbuff_t *payload_tvb;
if (tvb_reported_length(message_data_tvb) > 0) {
m2pa_li_tree = proto_tree_add_subtree(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, ett_m2pa_li, NULL, "Length Indicator");
proto_tree_add_item(m2pa_li_tree, hf_v8_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_li_tree, hf_v8_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
/* Re-adjust length of M2PA item since it will be dissected as MTP3 */
proto_item_set_len(m2pa_item, V8_HEADER_LENGTH + LI_LENGTH);
payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
}
}
#define PRIORITY_MASK 0xc0
#define SPARE_MASK 0x3f
#define PRI_OFFSET 0
#define PRI_LENGTH 1
static void
dissect_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
{
proto_tree *m2pa_li_tree;
tvbuff_t *payload_tvb;
if (tvb_reported_length(message_data_tvb) > 0) {
m2pa_li_tree = proto_tree_add_subtree(m2pa_tree, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ett_m2pa_li, NULL, "Priority");
proto_tree_add_item(m2pa_li_tree, hf_pri_prio, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ENC_BIG_ENDIAN);
proto_tree_add_item(m2pa_li_tree, hf_pri_spare, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ENC_BIG_ENDIAN);
/* Re-adjust length of M2PA item since it will be dissected as MTP3 */
proto_item_set_len(m2pa_item, HEADER_LENGTH + PRI_LENGTH);
payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
}
}
static const value_string v2_link_status_values[] = {
{ 1, "In Service" },
{ 2, "Processor Outage" },
{ 3, "Processor Outage Ended" },
{ 4, "Busy" },
{ 5, "Busy Ended" },
{ 0, NULL } };
#define STATUS_LENGTH 4
#define STATUS_OFFSET 0
#define FILLER_OFFSET (STATUS_OFFSET + STATUS_LENGTH)
static void
dissect_v2_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
{
col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str_const(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), v2_link_status_values, "Unknown"));
proto_tree_add_item(m2pa_tree, hf_v2_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
}
static const value_string v8_link_status_values[] = {
{ 1, "Alignment" },
{ 2, "Proving Normal" },
{ 3, "Proving Emergency" },
{ 4, "Ready" },
{ 5, "Processor Outage" },
{ 6, "Processor Outage Ended" },
{ 7, "Busy" },
{ 8, "Busy Ended" },
{ 9, "Out of Service" },
{ 0, NULL } };
static void
dissect_v8_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
{
guint16 filler_length;
col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str_const(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), v8_link_status_values, "Unknown"));
filler_length = tvb_reported_length(message_data_tvb) - STATUS_LENGTH;
proto_tree_add_item(m2pa_tree, hf_v8_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
if (filler_length > 0)
proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, ENC_NA);
}
static const value_string link_status_values[] = {
{ 1, "Alignment" },
{ 2, "Proving Normal" },
{ 3, "Proving Emergency" },
{ 4, "Ready" },
{ 5, "Processor Outage" },
{ 6, "Processor Outage Ended" },
{ 7, "Busy" },
{ 8, "Busy Ended" },
{ 9, "Out of Service" },
{ 0, NULL } };
static void
dissect_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
{
guint16 filler_length;
col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str_const(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), link_status_values, "Unknown"));
filler_length = tvb_reported_length(message_data_tvb) - STATUS_LENGTH;
proto_tree_add_item(m2pa_tree, hf_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
if (filler_length > 0)
proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, ENC_NA);
}
static void
dissect_unknown_message(tvbuff_t *message_data_tvb, proto_tree *m2pa_tree)
{
guint length;
length = tvb_reported_length(message_data_tvb);
if (length > 0)
proto_tree_add_item(m2pa_tree, hf_unknown_data, message_data_tvb, 0, length, ENC_NA);
}
#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 = tvb_get_ntohl(message_tvb, V2_LENGTH_OFFSET);
if (message_data_length < 1 || message_data_length > G_MAXINT) {
proto_tree_add_expert_format(m2pa_tree, pinfo, &ei_length, message_tvb, V2_LENGTH_OFFSET, 4,
"Invalid message data length: %u", message_data_length);
return;
}
message_data_tvb = tvb_new_subset_length(message_tvb, V2_MESSAGE_DATA_OFFSET, 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 (message_data_length < 1 || message_data_length > G_MAXINT) {
proto_tree_add_expert_format(m2pa_tree, pinfo, &ei_length, message_tvb, V8_LENGTH_OFFSET, 4,
"Invalid message data length: %u", message_data_length);
return;
}
message_data_tvb = tvb_new_subset_length(message_tvb, V8_MESSAGE_DATA_OFFSET, 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 MESSAGE_DATA_OFFSET (HEADER_OFFSET + HEADER_LENGTH)
static void
dissect_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
{
guint32 length, message_data_length, actual_length;
guint8 type;
tvbuff_t *message_data_tvb;
length = tvb_get_ntohl(message_tvb, LENGTH_OFFSET);
message_data_length = length - HEADER_LENGTH;
message_data_tvb = tvb_new_subset_length(message_tvb, MESSAGE_DATA_OFFSET, message_data_length);
type = tvb_get_guint8(message_tvb, TYPE_OFFSET);
switch(type) {
case USER_DATA_TYPE:
dissect_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
break;
case LINK_STATUS_TYPE:
dissect_link_status_message(message_data_tvb, pinfo, m2pa_tree);
break;
default:
dissect_unknown_message(message_data_tvb, m2pa_tree);
}
actual_length = tvb_reported_length(message_tvb);
if (actual_length > length)
{
proto_item *pi;
pi = proto_tree_add_item(m2pa_tree, hf_undecode_data, message_tvb, length, (actual_length - length), ENC_NA);
expert_add_info_format(pinfo, pi, &ei_undecode_data,
"There are %d bytes of data which is greater than M2PA's length parameter (%d)",
actual_length, length);
}
}
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_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
{
dissect_header(message_tvb, pinfo, m2pa_tree);
dissect_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
}
static int
dissect_m2pa(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *m2pa_item;
proto_tree *m2pa_tree;
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_RFC4165:
col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA");
break;
};
m2pa_item = proto_tree_add_item(tree, proto_m2pa, tvb, 0, -1, ENC_NA);
m2pa_tree = proto_item_add_subtree(m2pa_item, ett_m2pa);
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_RFC4165:
dissect_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
break;
};
return tvb_captured_length(tvb);
}
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_v2", FT_UINT16, BASE_HEX, VALS(v2_message_type_values), 0x0, NULL, HFILL} },
{ &hf_v8_type, { "Message Type", "m2pa.type_v8", FT_UINT8, BASE_DEC, VALS(v8_message_type_values), 0x0, NULL, HFILL} },
{ &hf_type, { "Message Type", "m2pa.type", FT_UINT8, BASE_DEC, VALS(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_v2", FT_UINT8, BASE_DEC, NULL, V2_LI_SPARE_MASK, NULL, HFILL} },
{ &hf_v8_li_spare, { "Spare", "m2pa.li_spare_v8", 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_v2", FT_UINT8, BASE_DEC, NULL, V2_LI_PRIORITY_MASK, NULL, HFILL} },
{ &hf_v8_li_prio, { "Priority", "m2pa.li_priority_v8", 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_v2", FT_UINT32, BASE_DEC, VALS(v2_link_status_values), 0x0, NULL, HFILL} },
{ &hf_v8_status, { "Link Status", "m2pa.status_v8", FT_UINT32, BASE_DEC, VALS(v8_link_status_values), 0x0, NULL, HFILL} },
{ &hf_status, { "Link Status", "m2pa.status", FT_UINT32, BASE_DEC, VALS(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} },
{ &hf_undecode_data,{ "Undecoded data", "m2pa.undecoded_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} }
};
static gint *ett[] = {
&ett_m2pa,
&ett_m2pa_li
};
static const enum_val_t m2pa_version_options[] = {
{ "draft-2", "Internet Draft version 2", M2PA_V02 },
{ "draft-8", "Internet Draft version 8", M2PA_V08 },
{ "RFC4165", "RFC 4165", M2PA_RFC4165 },
{ NULL, NULL, 0 }
};
static ei_register_info ei[] = {
{ &ei_undecode_data, { "m2pa.undecoded_data.expert", PI_MALFORMED, PI_WARN, "There are bytes of data which is greater than M2PA's length parameter", EXPFILL }},
{ &ei_length, { "m2pa.length.invalid", PI_MALFORMED, PI_ERROR, "Invalid message data length", EXPFILL }},
};
expert_module_t* expert_m2pa;
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));
expert_m2pa = expert_register_protocol(proto_m2pa);
expert_register_field_array(expert_m2pa, ei, array_length(ei));
/* Allow other dissectors to find this one by name. */
m2pa_handle = register_dissector("m2pa", dissect_m2pa, proto_m2pa);
m2pa_module = prefs_register_protocol(proto_m2pa, NULL);
prefs_register_enum_preference(m2pa_module, "version", "M2PA version", "Version used by Wireshark", &m2pa_version, m2pa_version_options, FALSE);
}
void
proto_reg_handoff_m2pa(void)
{
mtp3_handle = find_dissector_add_dependency("mtp3", proto_m2pa);
dissector_add_uint("sctp.ppi", M2PA_PAYLOAD_PROTOCOL_ID, m2pa_handle);
dissector_add_uint_with_preference("sctp.port", SCTP_PORT_M2PA, m2pa_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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