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 * SPDX-License-Identifier: GPL-2.0-or-later
23 #include <epan/packet.h>
24 #include <epan/exceptions.h>
25 #include <epan/prefs.h>
26 #include <epan/sctpppids.h>
27 #include <epan/expert.h>
29 void proto_register_m2pa(void);
30 void proto_reg_handoff_m2pa(void);
32 #define SCTP_PORT_M2PA 3565
34 static guint global_sctp_port = SCTP_PORT_M2PA;
36 static int proto_m2pa = -1;
37 static module_t *m2pa_module;
39 static int hf_version = -1;
40 static int hf_spare = -1;
41 static int hf_v2_type = -1;
42 static int hf_v8_type = -1;
43 static int hf_type = -1;
44 static int hf_class = -1;
45 static int hf_length = -1;
46 static int hf_unused = -1;
47 static int hf_bsn = -1;
48 static int hf_fsn = -1;
49 static int hf_v2_status = -1;
50 static int hf_v8_status = -1;
51 static int hf_status = -1;
52 static int hf_v2_li_spare = -1;
53 static int hf_v8_li_spare = -1;
54 static int hf_v2_li_prio = -1;
55 static int hf_v8_li_prio = -1;
56 static int hf_filler = -1;
57 static int hf_unknown_data = -1;
58 static int hf_pri_prio = -1;
59 static int hf_pri_spare = -1;
60 static int hf_undecode_data = -1;
62 static gint ett_m2pa = -1;
63 static gint ett_m2pa_li = -1;
65 static expert_field ei_undecode_data = EI_INIT;
66 static expert_field ei_length = EI_INIT;
68 static dissector_handle_t m2pa_handle;
69 static dissector_handle_t mtp3_handle;
77 static gint m2pa_version = M2PA_RFC4165;
79 #define VERSION_LENGTH 1
80 #define SPARE_LENGTH 1
81 #define CLASS_LENGTH 1
82 #define V2_TYPE_LENGTH 2
83 #define V8_TYPE_LENGTH 1
84 #define TYPE_LENGTH V8_TYPE_LENGTH
85 #define LENGTH_LENGTH 4
86 #define UNUSED_LENGTH 1
90 #define V2_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
91 V2_TYPE_LENGTH + LENGTH_LENGTH)
93 #define V8_HEADER_LENGTH (VERSION_LENGTH + SPARE_LENGTH + \
94 CLASS_LENGTH + V8_TYPE_LENGTH + LENGTH_LENGTH + \
95 UNUSED_LENGTH + BSN_LENGTH + UNUSED_LENGTH + \
97 #define HEADER_LENGTH V8_HEADER_LENGTH
99 #define HEADER_OFFSET 0
100 #define VERSION_OFFSET HEADER_OFFSET
101 #define SPARE_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
102 #define CLASS_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
103 #define V2_TYPE_OFFSET (SPARE_OFFSET + SPARE_LENGTH)
104 #define V8_TYPE_OFFSET (CLASS_OFFSET + CLASS_LENGTH)
105 #define TYPE_OFFSET V8_TYPE_OFFSET
106 #define V8_LENGTH_OFFSET (V8_TYPE_OFFSET + V8_TYPE_LENGTH)
107 #define LENGTH_OFFSET V8_LENGTH_OFFSET
108 #define V2_LENGTH_OFFSET (V2_TYPE_OFFSET + V2_TYPE_LENGTH)
109 #define FIRST_UNUSED_OFFSET (V8_LENGTH_OFFSET + LENGTH_LENGTH)
110 #define BSN_OFFSET (FIRST_UNUSED_OFFSET + UNUSED_LENGTH)
111 #define SECOND_UNUSED_OFFSET (BSN_OFFSET + BSN_LENGTH)
112 #define FSN_OFFSET (SECOND_UNUSED_OFFSET + UNUSED_LENGTH)
114 static const value_string protocol_version_values[] = {
118 static const value_string message_class_values[] = {
122 #define V2_USER_DATA_TYPE 0x0601
123 #define V2_LINK_STATUS_TYPE 0x0602
125 static const value_string v2_message_type_values[] = {
126 { V2_USER_DATA_TYPE, "User Data" },
127 { V2_LINK_STATUS_TYPE, "Link Status" },
130 #define V8_USER_DATA_TYPE 0x0001
131 #define V8_LINK_STATUS_TYPE 0x0002
133 static const value_string v8_message_type_values[] = {
134 { V8_USER_DATA_TYPE, "User Data" },
135 { V8_LINK_STATUS_TYPE, "Link Status" },
138 #define USER_DATA_TYPE V8_USER_DATA_TYPE
139 #define LINK_STATUS_TYPE V8_LINK_STATUS_TYPE
141 static const value_string message_type_values[] = {
142 { USER_DATA_TYPE, "User Data" },
143 { LINK_STATUS_TYPE, "Link Status" },
147 dissect_v2_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
149 guint16 message_type;
151 message_type = tvb_get_ntohs(header_tvb, V2_TYPE_OFFSET);
153 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v2_message_type_values, "reserved"));
155 proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
156 proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
157 proto_tree_add_item(m2pa_tree, hf_v2_type, header_tvb, V2_TYPE_OFFSET, V2_TYPE_LENGTH, ENC_BIG_ENDIAN);
158 proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V2_LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
162 dissect_v8_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
166 message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
168 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v8_message_type_values, "Unknown"));
170 proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
171 proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
172 proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, ENC_BIG_ENDIAN);
173 proto_tree_add_item(m2pa_tree, hf_v8_type, header_tvb, V8_TYPE_OFFSET, V8_TYPE_LENGTH, ENC_BIG_ENDIAN);
174 proto_tree_add_item(m2pa_tree, hf_length, header_tvb, V8_LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
175 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
176 proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, ENC_BIG_ENDIAN);
177 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
178 proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, ENC_BIG_ENDIAN);
182 dissect_header(tvbuff_t *header_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
186 message_type = tvb_get_guint8(header_tvb, V8_TYPE_OFFSET);
188 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_type, v8_message_type_values, "Unknown"));
190 proto_tree_add_item(m2pa_tree, hf_version, header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
191 proto_tree_add_item(m2pa_tree, hf_spare, header_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
192 proto_tree_add_item(m2pa_tree, hf_class, header_tvb, CLASS_OFFSET, CLASS_LENGTH, ENC_BIG_ENDIAN);
193 proto_tree_add_item(m2pa_tree, hf_type, header_tvb, TYPE_OFFSET, TYPE_LENGTH, ENC_BIG_ENDIAN);
194 proto_tree_add_item(m2pa_tree, hf_length, header_tvb, LENGTH_OFFSET, LENGTH_LENGTH, ENC_BIG_ENDIAN);
195 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, FIRST_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
196 proto_tree_add_item(m2pa_tree, hf_bsn, header_tvb, BSN_OFFSET, BSN_LENGTH, ENC_BIG_ENDIAN);
197 proto_tree_add_item(m2pa_tree, hf_unused, header_tvb, SECOND_UNUSED_OFFSET, UNUSED_LENGTH, ENC_BIG_ENDIAN);
198 proto_tree_add_item(m2pa_tree, hf_fsn, header_tvb, FSN_OFFSET, FSN_LENGTH, ENC_BIG_ENDIAN);
203 #define MTP3_OFFSET (LI_OFFSET + LI_LENGTH)
205 #define V2_LI_SPARE_MASK 0xfc
206 #define V2_LI_PRIORITY_MASK 0x3
209 dissect_v2_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
211 proto_tree *m2pa_li_tree;
212 tvbuff_t *payload_tvb;
214 if (tvb_reported_length(message_data_tvb) > 0) {
215 m2pa_li_tree = proto_tree_add_subtree(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, ett_m2pa_li, NULL, "Length Indicator");
217 proto_tree_add_item(m2pa_li_tree, hf_v2_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
218 proto_tree_add_item(m2pa_li_tree, hf_v2_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
220 /* Re-adjust length of M2PA item since it will be dissected as MTP3 */
221 proto_item_set_len(m2pa_item, V2_HEADER_LENGTH + LI_LENGTH);
224 payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
225 call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
228 #define V8_LI_SPARE_MASK 0x3f
229 #define V8_LI_PRIORITY_MASK 0xc0
232 dissect_v8_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
234 proto_tree *m2pa_li_tree;
235 tvbuff_t *payload_tvb;
237 if (tvb_reported_length(message_data_tvb) > 0) {
238 m2pa_li_tree = proto_tree_add_subtree(m2pa_tree, message_data_tvb, LI_OFFSET, LI_LENGTH, ett_m2pa_li, NULL, "Length Indicator");
239 proto_tree_add_item(m2pa_li_tree, hf_v8_li_prio, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
240 proto_tree_add_item(m2pa_li_tree, hf_v8_li_spare, message_data_tvb, LI_OFFSET, LI_LENGTH, ENC_BIG_ENDIAN);
242 /* Re-adjust length of M2PA item since it will be dissected as MTP3 */
243 proto_item_set_len(m2pa_item, V8_HEADER_LENGTH + LI_LENGTH);
245 payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
246 call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
250 #define PRIORITY_MASK 0xc0
251 #define SPARE_MASK 0x3f
257 dissect_user_data_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
259 proto_tree *m2pa_li_tree;
260 tvbuff_t *payload_tvb;
262 if (tvb_reported_length(message_data_tvb) > 0) {
263 m2pa_li_tree = proto_tree_add_subtree(m2pa_tree, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ett_m2pa_li, NULL, "Priority");
264 proto_tree_add_item(m2pa_li_tree, hf_pri_prio, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ENC_BIG_ENDIAN);
265 proto_tree_add_item(m2pa_li_tree, hf_pri_spare, message_data_tvb, PRI_OFFSET, PRI_LENGTH, ENC_BIG_ENDIAN);
267 /* Re-adjust length of M2PA item since it will be dissected as MTP3 */
268 proto_item_set_len(m2pa_item, HEADER_LENGTH + PRI_LENGTH);
270 payload_tvb = tvb_new_subset_remaining(message_data_tvb, MTP3_OFFSET);
271 call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
275 static const value_string v2_link_status_values[] = {
277 { 2, "Processor Outage" },
278 { 3, "Processor Outage Ended" },
283 #define STATUS_LENGTH 4
284 #define STATUS_OFFSET 0
285 #define FILLER_OFFSET (STATUS_OFFSET + STATUS_LENGTH)
288 dissect_v2_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
290 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"));
291 proto_tree_add_item(m2pa_tree, hf_v2_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
294 static const value_string v8_link_status_values[] = {
296 { 2, "Proving Normal" },
297 { 3, "Proving Emergency" },
299 { 5, "Processor Outage" },
300 { 6, "Processor Outage Ended" },
303 { 9, "Out of Service" },
307 dissect_v8_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
309 guint16 filler_length;
311 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"));
313 filler_length = tvb_reported_length(message_data_tvb) - STATUS_LENGTH;
315 proto_tree_add_item(m2pa_tree, hf_v8_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
316 if (filler_length > 0)
317 proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, ENC_NA);
320 static const value_string link_status_values[] = {
322 { 2, "Proving Normal" },
323 { 3, "Proving Emergency" },
325 { 5, "Processor Outage" },
326 { 6, "Processor Outage Ended" },
329 { 9, "Out of Service" },
333 dissect_link_status_message(tvbuff_t *message_data_tvb, packet_info *pinfo, proto_tree *m2pa_tree)
335 guint16 filler_length;
337 col_append_fstr(pinfo->cinfo, COL_INFO, "(%s) ", val_to_str_const(tvb_get_ntohl(message_data_tvb, STATUS_OFFSET), link_status_values, "Unknown"));
339 filler_length = tvb_reported_length(message_data_tvb) - STATUS_LENGTH;
341 proto_tree_add_item(m2pa_tree, hf_status, message_data_tvb, STATUS_OFFSET, STATUS_LENGTH, ENC_BIG_ENDIAN);
342 if (filler_length > 0)
343 proto_tree_add_item(m2pa_tree, hf_filler, message_data_tvb, FILLER_OFFSET, filler_length, ENC_NA);
347 dissect_unknown_message(tvbuff_t *message_data_tvb, proto_tree *m2pa_tree)
351 length = tvb_reported_length(message_data_tvb);
353 proto_tree_add_item(m2pa_tree, hf_unknown_data, message_data_tvb, 0, length, ENC_NA);
356 #define V2_MESSAGE_DATA_OFFSET (HEADER_OFFSET + V2_HEADER_LENGTH)
359 dissect_v2_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
361 guint32 message_data_length;
363 tvbuff_t *message_data_tvb;
365 message_data_length = tvb_get_ntohl(message_tvb, V2_LENGTH_OFFSET);
366 if (message_data_length < 1 || message_data_length > G_MAXINT) {
367 proto_tree_add_expert_format(m2pa_tree, pinfo, &ei_length, message_tvb, V2_LENGTH_OFFSET, 4,
368 "Invalid message data length: %u", message_data_length);
372 message_data_tvb = tvb_new_subset_length(message_tvb, V2_MESSAGE_DATA_OFFSET, message_data_length);
373 type = tvb_get_ntohs(message_tvb, V2_TYPE_OFFSET);
376 case V2_USER_DATA_TYPE:
377 dissect_v2_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
379 case V2_LINK_STATUS_TYPE:
380 dissect_v2_link_status_message(message_data_tvb, pinfo, m2pa_tree);
383 dissect_unknown_message(message_data_tvb, m2pa_tree);
387 #define V8_MESSAGE_DATA_OFFSET (HEADER_OFFSET + V8_HEADER_LENGTH)
390 dissect_v8_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
392 guint32 message_data_length;
394 tvbuff_t *message_data_tvb;
396 message_data_length = tvb_get_ntohl(message_tvb, V8_LENGTH_OFFSET) - V8_HEADER_LENGTH;
397 if (message_data_length < 1 || message_data_length > G_MAXINT) {
398 proto_tree_add_expert_format(m2pa_tree, pinfo, &ei_length, message_tvb, V8_LENGTH_OFFSET, 4,
399 "Invalid message data length: %u", message_data_length);
402 message_data_tvb = tvb_new_subset_length(message_tvb, V8_MESSAGE_DATA_OFFSET, message_data_length);
403 type = tvb_get_guint8(message_tvb, V8_TYPE_OFFSET);
407 case V8_USER_DATA_TYPE:
408 dissect_v8_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
410 case V8_LINK_STATUS_TYPE:
411 dissect_v8_link_status_message(message_data_tvb, pinfo, m2pa_tree);
414 dissect_unknown_message(message_data_tvb, m2pa_tree);
418 #define MESSAGE_DATA_OFFSET (HEADER_OFFSET + HEADER_LENGTH)
421 dissect_message_data(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
423 guint32 length, message_data_length, actual_length;
425 tvbuff_t *message_data_tvb;
427 length = tvb_get_ntohl(message_tvb, LENGTH_OFFSET);
428 message_data_length = length - HEADER_LENGTH;
429 message_data_tvb = tvb_new_subset_length(message_tvb, MESSAGE_DATA_OFFSET, message_data_length);
430 type = tvb_get_guint8(message_tvb, TYPE_OFFSET);
435 dissect_user_data_message(message_data_tvb, pinfo, m2pa_item, m2pa_tree, tree);
437 case LINK_STATUS_TYPE:
438 dissect_link_status_message(message_data_tvb, pinfo, m2pa_tree);
441 dissect_unknown_message(message_data_tvb, m2pa_tree);
444 actual_length = tvb_reported_length(message_tvb);
446 if (actual_length > length)
450 pi = proto_tree_add_item(m2pa_tree, hf_undecode_data, message_tvb, length, (actual_length - length), ENC_NA);
451 expert_add_info_format(pinfo, pi, &ei_undecode_data,
452 "There are %d bytes of data which is greater than M2PA's length parameter (%d)",
453 actual_length, length);
458 dissect_v2_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
460 dissect_v2_header(message_tvb, pinfo, m2pa_tree);
461 dissect_v2_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
465 dissect_v8_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
467 dissect_v8_header(message_tvb, pinfo, m2pa_tree);
468 dissect_v8_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
472 dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_item *m2pa_item, proto_tree *m2pa_tree, proto_tree *tree)
474 dissect_header(message_tvb, pinfo, m2pa_tree);
475 dissect_message_data(message_tvb, pinfo, m2pa_item, m2pa_tree, tree);
479 dissect_m2pa(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
481 proto_item *m2pa_item;
482 proto_tree *m2pa_tree;
484 switch(m2pa_version) {
486 col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA (ID 02)");
489 col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA (ID 08)");
492 col_set_str(pinfo->cinfo, COL_PROTOCOL, "M2PA");
496 m2pa_item = proto_tree_add_item(tree, proto_m2pa, tvb, 0, -1, ENC_NA);
497 m2pa_tree = proto_item_add_subtree(m2pa_item, ett_m2pa);
499 switch(m2pa_version) {
501 dissect_v2_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
504 dissect_v8_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
507 dissect_message(tvb, pinfo, m2pa_item, m2pa_tree, tree);
510 return tvb_captured_length(tvb);
514 proto_register_m2pa(void)
516 static hf_register_info hf[] =
517 { { &hf_version, { "Version", "m2pa.version", FT_UINT8, BASE_DEC, VALS(protocol_version_values), 0x0, NULL, HFILL} },
518 { &hf_spare, { "Spare", "m2pa.spare", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL} },
519 { &hf_v2_type, { "Message Type", "m2pa.type_v2", FT_UINT16, BASE_HEX, VALS(v2_message_type_values), 0x0, NULL, HFILL} },
520 { &hf_v8_type, { "Message Type", "m2pa.type_v8", FT_UINT8, BASE_DEC, VALS(v8_message_type_values), 0x0, NULL, HFILL} },
521 { &hf_type, { "Message Type", "m2pa.type", FT_UINT8, BASE_DEC, VALS(message_type_values), 0x0, NULL, HFILL} },
522 { &hf_class, { "Message Class", "m2pa.class", FT_UINT8, BASE_DEC, VALS(message_class_values), 0x0, NULL, HFILL} },
523 { &hf_length, { "Message length", "m2pa.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL} },
524 { &hf_unused, { "Unused", "m2pa.unused", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL} },
525 { &hf_bsn, { "BSN", "m2pa.bsn", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL} },
526 { &hf_fsn, { "FSN", "m2pa.fsn", FT_UINT24, BASE_DEC, NULL, 0x0, NULL, HFILL} },
527 { &hf_v2_li_spare, { "Spare", "m2pa.li_spare_v2", FT_UINT8, BASE_DEC, NULL, V2_LI_SPARE_MASK, NULL, HFILL} },
528 { &hf_v8_li_spare, { "Spare", "m2pa.li_spare_v8", FT_UINT8, BASE_HEX, NULL, V8_LI_SPARE_MASK, NULL, HFILL} },
529 { &hf_pri_spare, { "Spare", "m2pa.priority_spare", FT_UINT8, BASE_HEX, NULL, SPARE_MASK, NULL, HFILL} },
530 { &hf_v2_li_prio, { "Priority", "m2pa.li_priority_v2", FT_UINT8, BASE_DEC, NULL, V2_LI_PRIORITY_MASK, NULL, HFILL} },
531 { &hf_v8_li_prio, { "Priority", "m2pa.li_priority_v8", FT_UINT8, BASE_HEX, NULL, V8_LI_PRIORITY_MASK, NULL, HFILL} },
532 { &hf_pri_prio, { "Priority", "m2pa.priority", FT_UINT8, BASE_HEX, NULL, PRIORITY_MASK, NULL, HFILL} },
533 { &hf_v2_status, { "Link Status", "m2pa.status_v2", FT_UINT32, BASE_DEC, VALS(v2_link_status_values), 0x0, NULL, HFILL} },
534 { &hf_v8_status, { "Link Status", "m2pa.status_v8", FT_UINT32, BASE_DEC, VALS(v8_link_status_values), 0x0, NULL, HFILL} },
535 { &hf_status, { "Link Status", "m2pa.status", FT_UINT32, BASE_DEC, VALS(link_status_values), 0x0, NULL, HFILL} },
536 { &hf_filler, { "Filler", "m2pa.filler", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} },
537 { &hf_unknown_data, { "Unknown Data", "m2pa.unknown_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} },
538 { &hf_undecode_data,{ "Undecoded data", "m2pa.undecoded_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL} }
541 static gint *ett[] = {
546 static const enum_val_t m2pa_version_options[] = {
547 { "draft-2", "Internet Draft version 2", M2PA_V02 },
548 { "draft-8", "Internet Draft version 8", M2PA_V08 },
549 { "RFC4165", "RFC 4165", M2PA_RFC4165 },
553 static ei_register_info ei[] = {
554 { &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 }},
555 { &ei_length, { "m2pa.length.invalid", PI_MALFORMED, PI_ERROR, "Invalid message data length", EXPFILL }},
558 expert_module_t* expert_m2pa;
560 proto_m2pa = proto_register_protocol("MTP2 Peer Adaptation Layer", "M2PA", "m2pa");
562 proto_register_field_array(proto_m2pa, hf, array_length(hf));
563 proto_register_subtree_array(ett, array_length(ett));
564 expert_m2pa = expert_register_protocol(proto_m2pa);
565 expert_register_field_array(expert_m2pa, ei, array_length(ei));
567 /* Allow other dissectors to find this one by name. */
568 m2pa_handle = register_dissector("m2pa", dissect_m2pa, proto_m2pa);
570 m2pa_module = prefs_register_protocol(proto_m2pa, proto_reg_handoff_m2pa);
572 prefs_register_enum_preference(m2pa_module, "version", "M2PA version", "Version used by Wireshark", &m2pa_version, m2pa_version_options, FALSE);
573 prefs_register_uint_preference(m2pa_module, "port", "M2PA SCTP Port", "Set the port for M2PA messages (default: " G_STRINGIFY(SCTP_PORT_M2PA) ")", 10, &global_sctp_port);
577 proto_reg_handoff_m2pa(void)
579 static gboolean prefs_initialized = FALSE;
580 static guint sctp_port;
582 /* Port preferences code shamelessly copied from packet-beep.c */
583 if (!prefs_initialized) {
584 mtp3_handle = find_dissector_add_dependency("mtp3", proto_m2pa);
586 dissector_add_uint("sctp.ppi", M2PA_PAYLOAD_PROTOCOL_ID, m2pa_handle);
588 prefs_initialized = TRUE;
592 dissector_delete_uint("sctp.port", sctp_port, m2pa_handle);
596 /* Set our port number for future use */
597 sctp_port = global_sctp_port;
599 dissector_add_uint("sctp.port", sctp_port, m2pa_handle);
603 * Editor modelines - http://www.wireshark.org/tools/modelines.html
608 * indent-tabs-mode: nil
611 * ex: set shiftwidth=2 tabstop=8 expandtab:
612 * :indentSize=2:tabSize=8:noTabs=true: