2 * Routines for MTP2 Peer Adaptation Layer dissection
3 * It is hopefully (needs testing) compliant to
4 * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m2pa-02.txt
5 * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m2pa-08.txt
6 * http://tools.ietf.org/rfc/rfc4165.txt
8 * Copyright 2001, 2002, Jeff Morriss <jeff.morriss.ws [AT] gmail.com>,
9 * updated by Michael Tuexen <tuexen [AT] fh-muenster.de>
11 * Wireshark - Network traffic analyzer
12 * By Gerald Combs <gerald@wireshark.org>
13 * Copyright 1998 Gerald Combs
15 * Copied from packet-m3ua.c
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version 2
20 * of the License, or (at your option) any later version.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software
29 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
35 #include <epan/packet.h>
36 #include <epan/exceptions.h>
37 #include <epan/prefs.h>
38 #include <epan/sctpppids.h>
39 #include <epan/expert.h>
41 void proto_register_m2pa(void);
42 void proto_reg_handoff_m2pa(void);
44 #define SCTP_PORT_M2PA 3565
46 static guint global_sctp_port = SCTP_PORT_M2PA;
48 static int proto_m2pa = -1;
49 static module_t *m2pa_module;
51 static int hf_version = -1;
52 static int hf_spare = -1;
53 static int hf_v2_type = -1;
54 static int hf_v8_type = -1;
55 static int hf_type = -1;
56 static int hf_class = -1;
57 static int hf_length = -1;
58 static int hf_unused = -1;
59 static int hf_bsn = -1;
60 static int hf_fsn = -1;
61 static int hf_v2_status = -1;
62 static int hf_v8_status = -1;
63 static int hf_status = -1;
64 static int hf_v2_li_spare = -1;
65 static int hf_v8_li_spare = -1;
66 static int hf_v2_li_prio = -1;
67 static int hf_v8_li_prio = -1;
68 static int hf_filler = -1;
69 static int hf_unknown_data = -1;
70 static int hf_pri_prio = -1;
71 static int hf_pri_spare = -1;
72 static int hf_undecode_data = -1;
74 static gint ett_m2pa = -1;
75 static gint ett_m2pa_li = -1;
77 static expert_field ei_undecode_data = EI_INIT;
79 static dissector_handle_t mtp3_handle;
87 static gint m2pa_version = M2PA_RFC4165;
89 #define VERSION_LENGTH 1
90 #define SPARE_LENGTH 1
91 #define CLASS_LENGTH 1
92 #define V2_TYPE_LENGTH 2
93 #define V8_TYPE_LENGTH 1
94 #define TYPE_LENGTH V8_TYPE_LENGTH
95 #define LENGTH_LENGTH 4
96 #define UNUSED_LENGTH 1
100 #define V2_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
101 V2_TYPE_LENGTH + LENGTH_LENGTH)
103 #define V8_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
104 CLASS_LENGTH + V8_TYPE_LENGTH + LENGTH_LENGTH + \
105 UNUSED_LENGTH + BSN_LENGTH + UNUSED_LENGTH + \
107 #define HEADER_LENGTH V8_HEADER_LENGTH
109 #define HEADER_OFFSET 0
110 #define VERSION_OFFSET HEADER_OFFSET
111 #define SPARE_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
112 #define CLASS_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
113 #define V2_TYPE_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
114 #define V8_TYPE_OFFSET (CLASS_OFFSET + CLASS_LENGTH)
115 #define TYPE_OFFSET V8_TYPE_OFFSET
116 #define V8_LENGTH_OFFSET (V8_TYPE_OFFSET + V8_TYPE_LENGTH)
117 #define LENGTH_OFFSET V8_LENGTH_OFFSET
118 #define V2_LENGTH_OFFSET (V2_TYPE_OFFSET + V2_TYPE_LENGTH)
119 #define FIRST_UNUSED_OFFSET (V8_LENGTH_OFFSET + LENGTH_LENGTH)
120 #define BSN_OFFSET (FIRST_UNUSED_OFFSET + UNUSED_LENGTH)
121 #define SECOND_UNUSED_OFFSET (BSN_OFFSET + BSN_LENGTH)
122 #define FSN_OFFSET (SECOND_UNUSED_OFFSET + UNUSED_LENGTH)
124 static const value_string protocol_version_values[] = {
128 static const value_string message_class_values[] = {
132 #define V2_USER_DATA_TYPE 0x0601
133 #define V2_LINK_STATUS_TYPE 0x0602
135 static const value_string v2_message_type_values[] = {
136 { V2_USER_DATA_TYPE, "User Data" },
137 { V2_LINK_STATUS_TYPE, "Link Status" },
140 #define V8_USER_DATA_TYPE 0x0001
141 #define V8_LINK_STATUS_TYPE 0x0002
143 static const value_string v8_message_type_values[] = {
144 { V8_USER_DATA_TYPE, "User Data" },
145 { V8_LINK_STATUS_TYPE, "Link Status" },
148 #define USER_DATA_TYPE V8_USER_DATA_TYPE
149 #define LINK_STATUS_TYPE V8_LINK_STATUS_TYPE
151 static const value_string message_type_values[] = {
152 { USER_DATA_TYPE, "User Data" },
153 { LINK_STATUS_TYPE, "Link Status" },
157 dissect_v2_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
159 guint16 message_type;
161 message_type = tvb_get_ntohs(header_tvb, V2_TYPE_OFFSET);
163 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v2_message_type_values, "reserved"));
166 proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
167 proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
168 proto_tree_add_item(m2pa_tree, hf_v2_type, header_tvb, V2_TYPE_OFFSET, V2_TYPE_LENGTH, ENC_BIG_ENDIAN);
169 proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V2_LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
174 dissect_v8_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
178 message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
180 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v8_message_type_values, "Unknown"));
183 proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
184 proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
185 proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, ENC_BIG_ENDIAN);
186 proto_tree_add_item(m2pa_tree, hf_v8_type, header_tvb, V8_TYPE_OFFSET, V8_TYPE_LENGTH, ENC_BIG_ENDIAN);
187 proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V8_LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
188 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
189 proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, ENC_BIG_ENDIAN);
190 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
191 proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, ENC_BIG_ENDIAN);
196 dissect_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
200 message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
202 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v8_message_type_values, "Unknown"));
205 proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
206 proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
207 proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, ENC_BIG_ENDIAN);
208 proto_tree_add_item(m2pa_tree, hf_type, header_tvb, TYPE_OFFSET, TYPE_LENGTH, ENC_BIG_ENDIAN);
209 proto_tree_add_item(m2pa_tree, hf_length, header_tvb, LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
210 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
211 proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, ENC_BIG_ENDIAN);
212 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
213 proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, ENC_BIG_ENDIAN);
219 #define MTP3_OFFSET (LI_OFFSET + LI_LENGTH)
221 #define V2_LI_SPARE_MASK 0xfc
222 #define V2_LI_PRIORITY_MASK 0x3
225 dissect_v2_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
227 proto_item *m2pa_li_item;
228 proto_tree *m2pa_li_tree;
229 tvbuff_t *payload_tvb;
231 if (tvb_length(message_data_tvb) > 0) {
233 m2pa_li_item = proto_tree_add_text(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, "Length Indicator");
234 m2pa_li_tree = proto_item_add_subtree(m2pa_li_item, ett_m2pa_li);
236 proto_tree_add_item(m2pa_li_tree, hf_v2_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
237 proto_tree_add_item(m2pa_li_tree, hf_v2_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
239 /* Re-adjust length of M2PA item since it will be dissected as MTP3 */
240 proto_item_set_len(m2pa_item, V2_HEADER_LENGTH + LI_LENGTH);
244 payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
245 call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
248 #define V8_LI_SPARE_MASK 0x3f
249 #define V8_LI_PRIORITY_MASK 0xc0
252 dissect_v8_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
254 proto_item *m2pa_li_item;
255 proto_tree *m2pa_li_tree;
256 tvbuff_t *payload_tvb;
258 if (tvb_length(message_data_tvb) > 0) {
260 m2pa_li_item = proto_tree_add_text(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, "Length Indicator");
261 m2pa_li_tree = proto_item_add_subtree(m2pa_li_item, ett_m2pa_li);
262 proto_tree_add_item(m2pa_li_tree, hf_v8_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
263 proto_tree_add_item(m2pa_li_tree, hf_v8_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
265 /* Re-adjust length of M2PA item since it will be dissected as MTP3 */
266 proto_item_set_len(m2pa_item, V8_HEADER_LENGTH + LI_LENGTH);
269 payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
270 call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
274 #define PRIORITY_MASK 0xc0
275 #define SPARE_MASK 0x3f
281 dissect_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
283 proto_item *m2pa_li_item;
284 proto_tree *m2pa_li_tree;
285 tvbuff_t *payload_tvb;
287 if (tvb_length(message_data_tvb) > 0) {
289 m2pa_li_item = proto_tree_add_text(m2pa_tree, message_data_tvb, PRI_OFFSET, PRI_LENGTH, "Priority");
290 m2pa_li_tree = proto_item_add_subtree(m2pa_li_item, ett_m2pa_li);
291 proto_tree_add_item(m2pa_li_tree, hf_pri_prio, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ENC_BIG_ENDIAN);
292 proto_tree_add_item(m2pa_li_tree, hf_pri_spare, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ENC_BIG_ENDIAN);
294 /* Re-adjust length of M2PA item since it will be dissected as MTP3 */
295 proto_item_set_len(m2pa_item, HEADER_LENGTH + PRI_LENGTH);
298 payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
299 call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
303 static const value_string v2_link_status_values[] = {
305 { 2, "Processor Outage" },
306 { 3, "Processor Outage Ended" },
311 #define STATUS_LENGTH 4
312 #define STATUS_OFFSET 0
313 #define FILLER_OFFSET (STATUS_OFFSET + STATUS_LENGTH)
316 dissect_v2_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
318 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"));
319 proto_tree_add_item(m2pa_tree, hf_v2_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
322 static const value_string v8_link_status_values[] = {
324 { 2, "Proving Normal" },
325 { 3, "Proving Emergency" },
327 { 5, "Processor Outage" },
328 { 6, "Processor Outage Ended" },
331 { 9, "Out of Service" },
335 dissect_v8_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
337 guint16 filler_length;
339 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"));
341 filler_length = tvb_length(message_data_tvb) - STATUS_LENGTH;
343 proto_tree_add_item(m2pa_tree, hf_v8_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
344 if (filler_length > 0)
345 proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, ENC_NA);
348 static const value_string link_status_values[] = {
350 { 2, "Proving Normal" },
351 { 3, "Proving Emergency" },
353 { 5, "Processor Outage" },
354 { 6, "Processor Outage Ended" },
357 { 9, "Out of Service" },
361 dissect_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
363 guint16 filler_length;
365 col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str_const(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), link_status_values, "Unknown"));
367 filler_length = tvb_length(message_data_tvb) - STATUS_LENGTH;
369 proto_tree_add_item(m2pa_tree, hf_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
370 if (filler_length > 0)
371 proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, ENC_NA);
375 dissect_unknown_message(tvbuff_t *message_data_tvb, proto_tree *m2pa_tree)
379 length = tvb_length(message_data_tvb);
380 if ((m2pa_tree) && (length > 0))
381 proto_tree_add_item(m2pa_tree, hf_unknown_data, message_data_tvb, 0, length, ENC_NA);
384 #define V2_MESSAGE_DATA_OFFSET (HEADER_OFFSET + V2_HEADER_LENGTH)
387 dissect_v2_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
389 guint32 message_data_length;
391 tvbuff_t *message_data_tvb;
393 message_data_length = (gint) tvb_get_ntohl(message_tvb, V2_LENGTH_OFFSET);
394 if ((gint) message_data_length < 1) {
396 proto_tree_add_text(m2pa_tree, message_tvb, V2_LENGTH_OFFSET, 4,
397 "Invalid message data length: %u", message_data_length);
398 THROW(ReportedBoundsError);
401 message_data_tvb = tvb_new_subset(message_tvb, V2_MESSAGE_DATA_OFFSET, message_data_length, message_data_length);
402 type = tvb_get_ntohs(message_tvb, V2_TYPE_OFFSET);
405 case V2_USER_DATA_TYPE:
406 dissect_v2_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
408 case V2_LINK_STATUS_TYPE:
409 dissect_v2_link_status_message(message_data_tvb, pinfo, m2pa_tree);
412 dissect_unknown_message(message_data_tvb, m2pa_tree);
416 #define V8_MESSAGE_DATA_OFFSET (HEADER_OFFSET + V8_HEADER_LENGTH)
419 dissect_v8_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
421 guint32 message_data_length;
423 tvbuff_t *message_data_tvb;
425 message_data_length = tvb_get_ntohl(message_tvb, V8_LENGTH_OFFSET) - V8_HEADER_LENGTH;
426 if ((gint) message_data_length < 1) {
428 proto_tree_add_text(m2pa_tree, message_tvb, V8_LENGTH_OFFSET, 4,
429 "Invalid message data length: %u", message_data_length);
430 THROW(ReportedBoundsError);
432 message_data_tvb = tvb_new_subset(message_tvb, V8_MESSAGE_DATA_OFFSET, message_data_length, message_data_length);
433 type = tvb_get_guint8(message_tvb, V8_TYPE_OFFSET);
437 case V8_USER_DATA_TYPE:
438 dissect_v8_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
440 case V8_LINK_STATUS_TYPE:
441 dissect_v8_link_status_message(message_data_tvb, pinfo, m2pa_tree);
444 dissect_unknown_message(message_data_tvb, m2pa_tree);
448 #define MESSAGE_DATA_OFFSET (HEADER_OFFSET + HEADER_LENGTH)
451 dissect_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
453 guint32 length, message_data_length, actual_length;
455 tvbuff_t *message_data_tvb;
457 length = tvb_get_ntohl(message_tvb, LENGTH_OFFSET);
458 message_data_length = length - HEADER_LENGTH;
459 message_data_tvb = tvb_new_subset(message_tvb, MESSAGE_DATA_OFFSET, message_data_length, message_data_length);
460 type = tvb_get_guint8(message_tvb, TYPE_OFFSET);
465 dissect_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
467 case LINK_STATUS_TYPE:
468 dissect_link_status_message(message_data_tvb, pinfo, m2pa_tree);
471 dissect_unknown_message(message_data_tvb, m2pa_tree);
474 actual_length = tvb_reported_length(message_tvb);
476 if (actual_length > length)
480 pi = proto_tree_add_item(m2pa_tree, hf_undecode_data, message_tvb, length, (actual_length - length), ENC_NA);
481 expert_add_info_format(pinfo, pi, &ei_undecode_data,
482 "There are %d bytes of data which is greater than M2PA's length parameter (%d)",
483 actual_length, length);
488 dissect_v2_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
490 dissect_v2_header(message_tvb, pinfo, m2pa_tree);
491 dissect_v2_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
495 dissect_v8_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
497 dissect_v8_header(message_tvb, pinfo, m2pa_tree);
498 dissect_v8_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
502 dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
504 dissect_header(message_tvb, pinfo, m2pa_tree);
505 dissect_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
509 dissect_m2pa(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
511 proto_item *m2pa_item;
512 proto_tree *m2pa_tree;
514 switch(m2pa_version) {
516 col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA (ID 02)");
519 col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA (ID 08)");
522 col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA");
526 m2pa_item = proto_tree_add_item(tree, proto_m2pa, tvb, 0, -1, ENC_NA);
527 m2pa_tree = proto_item_add_subtree(m2pa_item, ett_m2pa);
529 switch(m2pa_version) {
531 dissect_v2_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
534 dissect_v8_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
537 dissect_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
543 proto_register_m2pa(void)
545 static hf_register_info hf[] =
546 { { &hf_version, { "Version", "m2pa.version", FT_UINT8, BASE_DEC, VALS(protocol_version_values), 0x0, NULL, HFILL} },
547 { &hf_spare, { "Spare", "m2pa.spare", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },
548 { &hf_v2_type, { "Message Type", "m2pa.type_v2", FT_UINT16, BASE_HEX, VALS(v2_message_type_values), 0x0, NULL, HFILL} },
549 { &hf_v8_type, { "Message Type", "m2pa.type_v8", FT_UINT8, BASE_DEC, VALS(v8_message_type_values), 0x0, NULL, HFILL} },
550 { &hf_type, { "Message Type", "m2pa.type", FT_UINT8, BASE_DEC, VALS(message_type_values), 0x0, NULL, HFILL} },
551 { &hf_class, { "Message Class", "m2pa.class", FT_UINT8, BASE_DEC, VALS(message_class_values), 0x0, NULL, HFILL} },
552 { &hf_length, { "Message length", "m2pa.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} },
553 { &hf_unused, { "Unused", "m2pa.unused", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },
554 { &hf_bsn, { "BSN", "m2pa.bsn", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL} },
555 { &hf_fsn, { "FSN", "m2pa.fsn", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL} },
556 { &hf_v2_li_spare, { "Spare", "m2pa.li_spare_v2", FT_UINT8, BASE_DEC, NULL, V2_LI_SPARE_MASK, NULL, HFILL} },
557 { &hf_v8_li_spare, { "Spare", "m2pa.li_spare_v8", FT_UINT8, BASE_HEX, NULL, V8_LI_SPARE_MASK, NULL, HFILL} },
558 { &hf_pri_spare, { "Spare", "m2pa.priority_spare", FT_UINT8, BASE_HEX, NULL, SPARE_MASK, NULL, HFILL} },
559 { &hf_v2_li_prio, { "Priority", "m2pa.li_priority_v2", FT_UINT8, BASE_DEC, NULL, V2_LI_PRIORITY_MASK, NULL, HFILL} },
560 { &hf_v8_li_prio, { "Priority", "m2pa.li_priority_v8", FT_UINT8, BASE_HEX, NULL, V8_LI_PRIORITY_MASK, NULL, HFILL} },
561 { &hf_pri_prio, { "Priority", "m2pa.priority", FT_UINT8, BASE_HEX, NULL, PRIORITY_MASK, NULL, HFILL} },
562 { &hf_v2_status, { "Link Status", "m2pa.status_v2", FT_UINT32, BASE_DEC, VALS(v2_link_status_values), 0x0, NULL, HFILL} },
563 { &hf_v8_status, { "Link Status", "m2pa.status_v8", FT_UINT32, BASE_DEC, VALS(v8_link_status_values), 0x0, NULL, HFILL} },
564 { &hf_status, { "Link Status", "m2pa.status", FT_UINT32, BASE_DEC, VALS(link_status_values), 0x0, NULL, HFILL} },
565 { &hf_filler, { "Filler", "m2pa.filler", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} },
566 { &hf_unknown_data, { "Unknown Data", "m2pa.unknown_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} },
567 { &hf_undecode_data,{ "Undecoded data", "m2pa.undecoded_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} }
570 static gint *ett[] = {
575 static const enum_val_t m2pa_version_options[] = {
576 { "draft-2", "Internet Draft version 2", M2PA_V02 },
577 { "draft-8", "Internet Draft version 8", M2PA_V08 },
578 { "RFC4165", "RFC 4165", M2PA_RFC4165 },
582 static ei_register_info ei[] = {
583 { &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 }},
586 expert_module_t* expert_m2pa;
588 proto_m2pa = proto_register_protocol("MTP2 Peer Adaptation Layer", "M2PA", "m2pa");
590 proto_register_field_array(proto_m2pa, hf, array_length(hf));
591 proto_register_subtree_array(ett, array_length(ett));
592 expert_m2pa = expert_register_protocol(proto_m2pa);
593 expert_register_field_array(expert_m2pa, ei, array_length(ei));
595 /* Allow other dissectors to find this one by name. */
596 register_dissector("m2pa", dissect_m2pa, proto_m2pa);
598 m2pa_module = prefs_register_protocol(proto_m2pa, proto_reg_handoff_m2pa);
600 prefs_register_enum_preference(m2pa_module, "version", "M2PA version", "Version used by Wireshark", &m2pa_version, m2pa_version_options, FALSE);
601 prefs_register_uint_preference(m2pa_module, "port", "M2PA SCTP Port", "Set the port for M2PA messages (Default of 3565)", 10, &global_sctp_port);
605 proto_reg_handoff_m2pa(void)
607 static gboolean prefs_initialized = FALSE;
608 static dissector_handle_t m2pa_handle;
609 static guint sctp_port;
611 /* Port preferences code shamelessly copied from packet-beep.c */
612 if (!prefs_initialized) {
613 m2pa_handle = find_dissector("m2pa");
614 mtp3_handle = find_dissector("mtp3");
616 dissector_add_uint("sctp.ppi", M2PA_PAYLOAD_PROTOCOL_ID, m2pa_handle);
618 prefs_initialized = TRUE;
622 dissector_delete_uint("sctp.port", sctp_port, m2pa_handle);
626 /* Set our port number for future use */
627 sctp_port = global_sctp_port;
629 dissector_add_uint("sctp.port", sctp_port, m2pa_handle);