1 /* packet-mtp3mg.c
2 * Routines for Message Transfer Part Level 3 Management and Test dissection
3 *
4 * It is (hopefully) compliant to:
5 * ANSI T1.111.4-1996
6 * ITU-T Q.704 7/1996
7 * ITU-T Q.707 7/1996 and ANSI T1.111.7-1996 (for SLT message formats)
8 * portions of ITU-T Q.2210 7/1996 (for XCO/XCA message formats)
9 * GF 001-9001 (Chinese ITU variant)
10 * JT-Q704, JT-Q707v2, and NTT-Q704 (Japan)
11 *
12 * Note that the division of the Japan SLS into the SLC and A/B bit is not
13 * done.
14 *
15 * Copyright 2003, Jeff Morriss <jeff.morriss.ws [AT] gmail.com>
16 *
17 * Wireshark - Network traffic analyzer
18 * By Gerald Combs <gerald@wireshark.org>
19 * Copyright 1998 Gerald Combs
20 *
21 * Copied from packet-mtp3.c
22 *
23 * SPDX-License-Identifier: GPL-2.0-or-later
24 */
25
26 #include "config.h"
27
28 #include <epan/packet.h>
29 #include <epan/expert.h>
30
31 #include <wsutil/str_util.h>
32
33 #include "packet-mtp3.h"
34
35 void proto_register_mtp3mg(void);
36 void proto_reg_handoff_mtp3mg(void);
37
38 #define H0H1_LENGTH 1
39 #define H0_MASK 0x0f
40 #define H1_MASK 0xf0
41 #define H1_SHIFT 4
42
43 #define H0_CHM 0x01
44 #define H0_ECM 0x02
45 #define H0_FCM 0x03
46 #define H0_TFM 0x04
47 #define H0_RSM 0x05
48 #define H0_MIM 0x06 /* not used in Japan */
49 #define H0_TRM 0x07 /* not used in Japan */
50 #define H0_DLM 0x08 /* not used in Japan */
51 #define H0_UFC 0x0a /* not used in Japan */
52 static const value_string h0_message_type_values[] = {
53 { H0_CHM, "Changeover and changeback messages" },
54 { H0_ECM, "Emergency changeover messages" },
55 { H0_FCM, "Transfer-controlled and signalling route set congestion messages" },
56 { H0_TFM, "Transfer prohibited-allowed-restricted messages" },
57 { H0_RSM, "Signalling-route-set-test messages" },
58 { H0_MIM, "Management inhibit messages" },
59 { H0_TRM, "Traffic restart messages" },
60 { H0_DLM, "Signalling-data-link-connection messages" },
61 { H0_UFC, "User part flow control messages" },
62 { 0, NULL } };
63
64 #define TEST_H0_SLT 0x1
65 static const value_string test_h0_message_type_values[] = {
66 { TEST_H0_SLT, "Test messages" },
67 { 0, NULL } };
68
69 #define CHM_H1_COO 0x01
70 #define CHM_H1_COA 0x02
71 #define CHM_H1_XCO 0x03
72 #define CHM_H1_XCA 0x04
73 #define CHM_H1_CBD 0x05
74 #define CHM_H1_CBA 0x06
75 static const value_string chm_h1_message_type_values[] = {
76 { CHM_H1_COO, "Changeover-order signal" },
77 { CHM_H1_COA, "Changeover-ack signal" },
78 { CHM_H1_XCO, "Extended changeover-order signal" },
79 { CHM_H1_XCA, "Extended changeover-ack signal" },
80 { CHM_H1_CBD, "Changeback-declaration signal" },
81 { CHM_H1_CBA, "Changeback-ack signal" },
82 { 0, NULL } };
83
84 /* Same as above but in acronym form (for the Info column) */
85 static const value_string chm_h1_message_type_acro_values[] = {
86 { CHM_H1_COO, "COO" },
87 { CHM_H1_COA, "COA" },
88 { CHM_H1_XCO, "XCO" },
89 { CHM_H1_XCA, "XCA" },
90 { CHM_H1_CBD, "CBD" },
91 { CHM_H1_CBA, "CBA" },
92 { 0, NULL } };
93
94 #define ECM_H1_ECO 0x01
95 #define ECM_H1_ECA 0x02
96 static const value_string ecm_h1_message_type_values[] = {
97 { ECM_H1_ECO, "Emergency-changeover-order signal" },
98 { ECM_H1_ECA, "Emergency-changeover-ack signal" },
99 { 0, NULL } };
100
101 /* Same as above but in acronym form (for the Info column) */
102 static const value_string ecm_h1_message_type_acro_values[] = {
103 { ECM_H1_ECO, "ECO" },
104 { ECM_H1_ECA, "ECA" },
105 { 0, NULL } };
106
107 #define FCM_H1_RCT 0x01
108 #define FCM_H1_TFC 0x02
109 static const value_string fcm_h1_message_type_values[] = {
110 { FCM_H1_RCT, "Signalling-route-set-congestion-test signal" },
111 { FCM_H1_TFC, "Transfer-controlled signal" },
112 { 0, NULL } };
113
114 /* Same as above but in acronym form (for the Info column) */
115 static const value_string fcm_h1_message_type_acro_values[] = {
116 { FCM_H1_RCT, "RCT" },
117 { FCM_H1_TFC, "TFC" },
118 { 0, NULL } };
119
120 #define TFM_H1_TFP 0x01
121 #define TFM_H1_TCP 0x02 /* ANSI only */
122 #define TFM_H1_TFR 0x03
123 #define TFM_H1_TCR 0x04 /* ANSI only */
124 #define TFM_H1_TFA 0x05
125 #define TFM_H1_TCA 0x06 /* ANSI only */
126 static const value_string tfm_h1_message_type_values[] = {
127 { TFM_H1_TFP, "Transfer-prohibited signal" },
128 { TFM_H1_TCP, "Transfer-cluster-prohibited signal (ANSI only)" },
129 { TFM_H1_TFR, "Transfer-restricted signal" },
130 { TFM_H1_TCR, "Transfer-cluster-restricted signal (ANSI only)" },
131 { TFM_H1_TFA, "Transfer-allowed signal" },
132 { TFM_H1_TCA, "Transfer-cluster-allowed signal (ANSI only)" },
133 { 0, NULL } };
134
135 /* Same as above but in acronym form (for the Info column) */
136 static const value_string tfm_h1_message_type_acro_values[] = {
137 { TFM_H1_TFP, "TFP" },
138 { TFM_H1_TCP, "TCP" },
139 { TFM_H1_TFR, "TFR" },
140 { TFM_H1_TCR, "TCR" },
141 { TFM_H1_TFA, "TFA" },
142 { TFM_H1_TCA, "TCA" },
143 { 0, NULL } };
144
145 #define RSM_H1_RST 0x01
146 #define RSM_H1_RSR 0x02
147 #define RSM_H1_RCP 0x03 /* ANSI only */
148 #define RSM_H1_RCR 0x04 /* ANSI only */
149 static const value_string rsm_h1_message_type_values[] = {
150 { RSM_H1_RST, "Signalling-route-set-test prohibited signal" },
151 { RSM_H1_RSR, "Signalling-route-set-test restricted signal" },
152 { RSM_H1_RCP, "Signalling-route-set-test cluster-prohibited signal (ANSI only)" },
153 { RSM_H1_RCR, "Signalling-route-set-test cluster-restricted signal (ANSI only)" },
154 { 0, NULL } };
155
156 /* Same as above but in acronym form (for the Info column) */
157 static const value_string rsm_h1_message_type_acro_values[] = {
158 { RSM_H1_RST, "RST" },
159 { RSM_H1_RSR, "RSR" },
160 { RSM_H1_RCP, "RCP" },
161 { RSM_H1_RCR, "RCR" },
162 { 0, NULL } };
163
164 #define MIM_H1_LIN 0x01
165 #define MIM_H1_LUN 0x02
166 #define MIM_H1_LIA 0x03
167 #define MIM_H1_LUA 0x04
168 #define MIM_H1_LID 0x05
169 #define MIM_H1_LFU 0x06
170 #define MIM_H1_LLT 0x07 /* LLI in ANSI */
171 #define MIM_H1_LRT 0x08 /* LRI in ANSI */
172 static const value_string mim_h1_message_type_values[] = {
173 { MIM_H1_LIN, "Link inhibit signal" },
174 { MIM_H1_LUN, "Link uninhibit signal" },
175 { MIM_H1_LIA, "Link inhibit ack signal" },
176 { MIM_H1_LUA, "Link uninhibit ack signal" },
177 { MIM_H1_LID, "Link inhibit denied signal" },
178 { MIM_H1_LFU, "Link forced uninhibit signal" },
179 { MIM_H1_LLT, "Link local inhibit test signal" },
180 { MIM_H1_LRT, "Link remote inhibit test signal" },
181 { 0, NULL } };
182
183 /* Same as above but in acronym form (for the Info column) */
184 static const value_string mim_h1_message_type_acro_values[] = {
185 { MIM_H1_LIN, "LIN" },
186 { MIM_H1_LUN, "LUN" },
187 { MIM_H1_LIA, "LIA" },
188 { MIM_H1_LUA, "LUA" },
189 { MIM_H1_LID, "LID" },
190 { MIM_H1_LFU, "LFU" },
191 { MIM_H1_LLT, "LLT (LLI)" },
192 { MIM_H1_LRT, "LRT (LRI)" },
193 { 0, NULL } };
194
195 #define TRM_H1_TRA 0x01
196 #define TRM_H1_TRW 0x02 /* ANSI only */
197 static const value_string trm_h1_message_type_values[] = {
198 { TRM_H1_TRA, "Traffic-restart-allowed signal" },
199 { TRM_H1_TRW, "Traffic-restart-waiting signal (ANSI only)" },
200 { 0, NULL } };
201
202 /* Same as above but in acronym form (for the Info column) */
203 static const value_string trm_h1_message_type_acro_values[] = {
204 { TRM_H1_TRA, "TRA" },
205 { TRM_H1_TRW, "TRW" },
206 { 0, NULL } };
207
208 #define DLM_H1_DLC 0x01
209 #define DLM_H1_CSS 0x02
210 #define DLM_H1_CNS 0x03
211 #define DLM_H1_CNP 0x04
212 static const value_string dlm_h1_message_type_values[] = {
213 { DLM_H1_DLC, "Signalling-data-link-connection-order signal" },
214 { DLM_H1_CSS, "Connection-successful signal" },
215 { DLM_H1_CNS, "Connection-not-successful signal" },
216 { DLM_H1_CNP, "Connection-not-possible signal" },
217 { 0, NULL } };
218
219 /* Same as above but in acronym form (for the Info column) */
220 static const value_string dlm_h1_message_type_acro_values[] = {
221 { DLM_H1_DLC, "DLC" },
222 { DLM_H1_CSS, "CSS" },
223 { DLM_H1_CNS, "CNS" },
224 { DLM_H1_CNP, "CNP" },
225 { 0, NULL } };
226
227 #define UFC_H1_UPU 0x01
228 static const value_string ufc_h1_message_type_values[] = {
229 { UFC_H1_UPU, "User part unavailable signal" },
230 { 0, NULL } };
231
232 /* Same as above but in acronym form (for the Info column) */
233 static const value_string ufc_h1_message_type_acro_values[] = {
234 { UFC_H1_UPU, "UPU" },
235 { 0, NULL } };
236
237 static const value_string upu_cause_values[] = {
238 { 0x0, "Unknown" },
239 { 0x1, "Unequipped remote user" },
240 { 0x2, "Inaccessible remote user" },
241 { 0, NULL } };
242
243 #define TEST_H1_SLTM 0x1
244 #define TEST_H1_SLTA 0x2
245 static const value_string test_h1_message_type_values[] = {
246 { TEST_H1_SLTM, "Signalling link test message" },
247 { TEST_H1_SLTA, "Signalling link test acknowledgement message" },
248 { 0, NULL } };
249
250 /* Same as above but in acronym form (for the Info column) */
251 static const value_string test_h1_message_type_acro_values[] = {
252 { TEST_H1_SLTM, "SLTM" },
253 { TEST_H1_SLTA, "SLTA" },
254 { 0, NULL } };
255
256 #define JAPAN_TEST_SRT 0x23
257 #define JAPAN_TEST_SRA 0x84
258 static const value_string japan_test_message_type_values[] = {
259 { JAPAN_TEST_SRT, "Signalling routing test message" },
260 { JAPAN_TEST_SRA, "Signalling routing test acknowledgement message" },
261 { 0, NULL } };
262
263 /* Same as above but in acronym form (for the Info column) */
264 static const value_string japan_test_message_type_acro_values[] = {
265 { JAPAN_TEST_SRT, "SRT" },
266 { JAPAN_TEST_SRA, "SRA" },
267 { 0, NULL } };
268
269 #define ANSI_COO_LENGTH 2
270 #define ANSI_COO_SLC_MASK 0x000f
271 #define ANSI_COO_FSN_MASK 0x07f0
272 #define ITU_COO_LENGTH 1
273 #define ITU_COO_FSN_MASK 0x007f
274 #define ANSI_XCO_LENGTH 4
275 #define ANSI_XCO_SLC_MASK 0x0000000f
276 #define ANSI_XCO_FSN_MASK 0x0ffffff0
277 #define ITU_XCO_LENGTH 3
278 #define ANSI_CBD_LENGTH 2
279 #define ANSI_CBD_SLC_MASK 0x000f
280 #define ANSI_CBD_CBC_MASK 0x0ff0
281 #define ITU_CBD_LENGTH 1
282 #define JAPAN_CBD_CBC_MASK 0x3
283
284 #define ANSI_ECO_LENGTH 1
285 #define ANSI_ECO_SLC_MASK 0x0f
286
287 #define ANSI_TFC_STATUS_LENGTH 1
288 #define ANSI_TFC_STATUS_OFFSET ANSI_PC_LENGTH
289 #define ANSI_TFC_STATUS_MASK 0x03
290 #define ITU_TFC_STATUS_LENGTH ITU_PC_LENGTH
291 #define ITU_TFC_STATUS_MASK 0xc000
292 #define JAPAN_TFC_SPARE_OFFSET 0
293 #define JAPAN_TFC_SPARE_LENGTH 1
294 #define JAPAN_TFC_APC_OFFSET JAPAN_TFC_SPARE_LENGTH
295 #define JAPAN_TFC_STATUS_OFFSET (JAPAN_TFC_SPARE_LENGTH + JAPAN_PC_LENGTH)
296 #define JAPAN_TFC_STATUS_LENGTH 1
297 #define JAPAN_TFC_STATUS_MASK 0x03
298 #define JAPAN_TFC_STATUS_SPARE_MASK 0xfc
299
300 #define JAPAN_TFM_COUNT_OFFSET 0
301 #define JAPAN_TFM_COUNT_LENGTH 1
302
303 #define ANSI_MIM_LENGTH 1
304 #define ANSI_MIM_SLC_MASK 0x0f
305
306 #define ANSI_DLC_LENGTH 3
307 #define ANSI_DLC_SLC_MASK 0x0000f
308 #define ANSI_DLC_LINK_MASK 0x3fff0
309 #define ITU_DLC_LENGTH 2
310 #define ITU_DLC_LINK_MASK 0x0fff
311
312 #define ANSI_UPU_USER_OFFSET ANSI_PC_LENGTH
313 #define UPU_USER_LENGTH 1
314 #define UPU_USER_MASK 0x0f
315 #define UPU_CAUSE_MASK 0xf0
316 #define ITU_UPU_USER_OFFSET ITU_PC_LENGTH
317
318 #define TEST_LENGTH 1
319 #define TEST_LENGTH_MASK 0xf0
320 #define TEST_LENGTH_SHIFT 4
321 #define TEST_PATTERN_OFFSET TEST_LENGTH
322 #define ANSI_TEST_SLC_MASK 0x000f
323
324 #define JAPAN_SPARE_LENGTH 1
325 #define JAPAN_H0H1_OFFSET JAPAN_SPARE_LENGTH
326
327 #define JAPAN_TEST_SPARE_OFFSET JAPAN_SPARE_LENGTH + H0H1_LENGTH
328 #define JAPAN_TEST_SPARE_LENGTH 1
329 #define JAPAN_TEST_PATTERN_OFFSET (JAPAN_TEST_SPARE_OFFSET + JAPAN_TEST_SPARE_LENGTH)
330 #define JAPAN_TEST_PATTERN_LENGTH 2
331 #define JAPAN_TEST_PATTERN 0x7711
332
333
334 /* This list is slightly different from that in packet-mtp3.c */
335 static const value_string service_indicator_code_vals[] = {
336 { 0x0, "Spare" },
337 { 0x1, "Spare"},
338 { 0x2, "Spare" },
339 { 0x3, "SCCP" },
340 { 0x4, "TUP" },
341 { 0x5, "ISUP" },
342 { 0x6, "DUP (call and circuit related messages)" },
343 { 0x7, "DUP (facility registration and cancellation message)" },
344 { 0x8, "MTP testing user part" },
345 { 0x9, "ISUP-b" },
346 { 0xa, "ISUP-s" },
347 { 0xb, "Spare" },
348 { 0xc, "Spare" },
349 { 0xd, "Spare" },
350 { 0xe, "Spare" },
351 { 0xf, "Spare" },
352 { 0, NULL }
353 };
354
355 /* Initialize the protocol and registered fields */
356 static int proto_mtp3mg = -1;
357 static int hf_mtp3mg_h0 = -1;
358 static int hf_mtp3mg_chm_h1 = -1;
359 static int hf_mtp3mg_ecm_h1 = -1;
360 static int hf_mtp3mg_fcm_h1 = -1;
361 static int hf_mtp3mg_tfm_h1 = -1;
362 static int hf_mtp3mg_rsm_h1 = -1;
363 static int hf_mtp3mg_mim_h1 = -1;
364 static int hf_mtp3mg_trm_h1 = -1;
365 static int hf_mtp3mg_dlm_h1 = -1;
366 static int hf_mtp3mg_ufc_h1 = -1;
367 static int hf_mtp3mg_coo_ansi_slc = -1;
368 static int hf_mtp3mg_coo_ansi_fsn = -1;
369 static int hf_mtp3mg_coo_itu_fsn = -1;
370 static int hf_mtp3mg_xco_ansi_slc = -1;
371 static int hf_mtp3mg_xco_ansi_fsn = -1;
372 static int hf_mtp3mg_xco_itu_fsn = -1;
373 static int hf_mtp3mg_cbd_ansi_slc = -1;
374 static int hf_mtp3mg_cbd_ansi_cbc = -1;
375 static int hf_mtp3mg_cbd_itu_cbc = -1;
376 static int hf_mtp3mg_cbd_japan_cbc = -1;
377 static int hf_mtp3mg_eco_ansi_slc = -1;
378 static int hf_mtp3mg_ansi_apc = -1;
379 static int hf_mtp3mg_apc_member = -1;
380 static int hf_mtp3mg_apc_cluster = -1;
381 static int hf_mtp3mg_apc_network = -1;
382 static int hf_mtp3mg_tfc_ansi_status = -1;
383 static int hf_mtp3mg_itu_apc = -1;
384 static int hf_mtp3mg_tfc_itu_status = -1;
385 static int hf_mtp3mg_chinese_apc = -1;
386 static int hf_mtp3mg_tfc_japan_spare = -1;
387 static int hf_mtp3mg_japan_apc = -1;
388 static int hf_mtp3mg_tfc_japan_status = -1;
389 static int hf_mtp3mg_tfc_japan_status_spare = -1;
390 static int hf_mtp3mg_tfm_japan_count = -1;
391 static int hf_mtp3mg_tfm_japan_spare = -1;
392 static int hf_mtp3mg_rsm_japan_count = -1;
393 static int hf_mtp3mg_rsm_japan_spare = -1;
394 static int hf_mtp3mg_mim_ansi_slc = -1;
395 static int hf_mtp3mg_dlc_ansi_slc = -1;
396 static int hf_mtp3mg_dlc_ansi_link = -1;
397 static int hf_mtp3mg_dlc_itu_link = -1;
398 static int hf_mtp3mg_upu_user = -1;
399 static int hf_mtp3mg_upu_cause = -1;
400 static int hf_mtp3test_h0 = -1;
401 static int hf_mtp3mg_test_h1 = -1;
402 static int hf_mtp3mg_test_ansi_slc = -1;
403 static int hf_mtp3mg_test_length = -1;
404 static int hf_mtp3mg_japan_test = -1;
405 static int hf_mtp3mg_japan_test_spare = -1;
406 static int hf_mtp3mg_japan_test_pattern = -1;
407 static int hf_mtp3mg_japan_spare = -1;
408 static int hf_mtp3mg_test_pattern = -1;
409
410 /* Initialize the subtree pointers */
411 static gint ett_mtp3mg = -1;
412 static gint ett_mtp3mg_fcm_apc = -1;
413 static gint ett_mtp3mg_tfm_apc = -1;
414 static gint ett_mtp3mg_rsm_apc = -1;
415 static gint ett_mtp3mg_upu_apc = -1;
416
417 static expert_field ei_mtp3mg_unknown_message = EI_INIT;
418
419 static dissector_handle_t mtp3mg_handle;
420
421 static void
dissect_mtp3mg_unknown_message(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree)422 dissect_mtp3mg_unknown_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
423 {
424 guint8 message_length;
425
426 message_length = tvb_captured_length(tvb);
427 proto_tree_add_expert_format(tree, pinfo, &ei_mtp3mg_unknown_message, tvb, 0, message_length,
428 "Unknown message (%u byte%s)", message_length,
429 plurality(message_length, "", "s"));
430 }
431
432 static void
dissect_mtp3mg_chm(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)433 dissect_mtp3mg_chm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
434 guint8 h1)
435 {
436 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
437 val_to_str_const(h1, chm_h1_message_type_acro_values, "Unknown"));
438
439 switch (h1)
440 {
441 case CHM_H1_COO:
442 case CHM_H1_COA:
443 if (mtp3_standard == ANSI_STANDARD)
444 {
445 proto_tree_add_item(tree, hf_mtp3mg_coo_ansi_slc, tvb, 0,
446 ANSI_COO_LENGTH, ENC_LITTLE_ENDIAN);
447 proto_tree_add_item(tree, hf_mtp3mg_coo_ansi_fsn, tvb, 0,
448 ANSI_COO_LENGTH, ENC_LITTLE_ENDIAN);
449 } else /* ITU_STANDARD, CHINESE_ITU_STANDARD, and JAPAN_STANDARD */ {
450 proto_tree_add_item(tree, hf_mtp3mg_coo_itu_fsn, tvb, 0,
451 ITU_COO_LENGTH, ENC_LITTLE_ENDIAN);
452 }
453 break;
454
455 case CHM_H1_XCO:
456 case CHM_H1_XCA:
457 if (mtp3_standard == ANSI_STANDARD)
458 {
459 proto_tree_add_item(tree, hf_mtp3mg_xco_ansi_slc, tvb, 0,
460 ANSI_XCO_LENGTH, ENC_LITTLE_ENDIAN);
461 proto_tree_add_item(tree, hf_mtp3mg_xco_ansi_fsn, tvb, 0,
462 ANSI_XCO_LENGTH, ENC_LITTLE_ENDIAN);
463 } else /* ITU_STANDARD, CHINESE_ITU_STANDARD, and JAPAN_STANDARD */ {
464 proto_tree_add_item(tree, hf_mtp3mg_xco_itu_fsn, tvb, 0,
465 ITU_XCO_LENGTH, ENC_LITTLE_ENDIAN);
466 }
467 break;
468
469 case CHM_H1_CBD:
470 case CHM_H1_CBA:
471 if (mtp3_standard == ANSI_STANDARD)
472 {
473 proto_tree_add_item(tree, hf_mtp3mg_cbd_ansi_slc, tvb, 0,
474 ANSI_CBD_LENGTH, ENC_LITTLE_ENDIAN);
475 proto_tree_add_item(tree, hf_mtp3mg_cbd_ansi_cbc, tvb, 0,
476 ANSI_CBD_LENGTH, ENC_LITTLE_ENDIAN);
477 } else if (mtp3_standard == JAPAN_STANDARD) {
478 proto_tree_add_item(tree, hf_mtp3mg_cbd_japan_cbc, tvb, 0,
479 ITU_CBD_LENGTH, ENC_LITTLE_ENDIAN);
480 } else /* ITU_STANDARD and CHINESE_ITU_STANDARD */ {
481 proto_tree_add_item(tree, hf_mtp3mg_cbd_itu_cbc, tvb, 0,
482 ITU_CBD_LENGTH, ENC_LITTLE_ENDIAN);
483 }
484 break;
485
486 default:
487 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
488 }
489 }
490
491 static void
dissect_mtp3mg_ecm(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)492 dissect_mtp3mg_ecm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
493 guint8 h1)
494 {
495
496 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
497 val_to_str_const(h1, ecm_h1_message_type_acro_values, "Unknown"));
498
499 switch (h1)
500 {
501 case ECM_H1_ECO:
502 case ECM_H1_ECA:
503 if (mtp3_standard == ANSI_STANDARD)
504 {
505 proto_tree_add_item(tree, hf_mtp3mg_eco_ansi_slc, tvb, 0,
506 ANSI_ECO_LENGTH, ENC_LITTLE_ENDIAN);
507 }
508 /* else: nothing to dissect */
509 break;
510
511 default:
512 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
513 }
514 }
515
516 static void
dissect_mtp3mg_fcm(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)517 dissect_mtp3mg_fcm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
518 guint8 h1)
519 {
520 proto_item *apc_item;
521
522 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
523 val_to_str_const(h1, fcm_h1_message_type_acro_values, "Unknown"));
524
525 switch (h1)
526 {
527 case FCM_H1_RCT:
528 /* nothing to dissect */
529 break;
530
531 case FCM_H1_TFC:
532 if (mtp3_standard == ITU_STANDARD)
533 {
534
535 apc_item = proto_tree_add_item(tree, hf_mtp3mg_itu_apc, tvb, 0,
536 ITU_PC_LENGTH, ENC_LITTLE_ENDIAN);
537
538 if (mtp3_pc_structured()) {
539 guint32 apc;
540
541 apc = tvb_get_letohs(tvb, 0) & ITU_PC_MASK;
542 proto_item_append_text(apc_item, " (%s)", mtp3_pc_to_str(apc));
543 }
544
545 /* Congestion level is a national option */
546 proto_tree_add_item(tree, hf_mtp3mg_tfc_itu_status, tvb, 0,
547 ITU_TFC_STATUS_LENGTH, ENC_LITTLE_ENDIAN);
548
549
550
551 } else if (mtp3_standard == JAPAN_STANDARD) {
552
553 proto_tree_add_item(tree, hf_mtp3mg_tfc_japan_spare, tvb,
554 JAPAN_TFC_SPARE_OFFSET,
555 JAPAN_TFC_SPARE_LENGTH, ENC_LITTLE_ENDIAN);
556
557 apc_item = proto_tree_add_item(tree, hf_mtp3mg_japan_apc, tvb,
558 JAPAN_TFC_APC_OFFSET,
559 JAPAN_PC_LENGTH, ENC_LITTLE_ENDIAN);
560 if (mtp3_pc_structured()) {
561 guint32 apc;
562
563 apc = tvb_get_letohs(tvb, JAPAN_TFC_APC_OFFSET);
564 proto_item_append_text(apc_item, " (%s)", mtp3_pc_to_str(apc));
565 }
566
567 proto_tree_add_item(tree, hf_mtp3mg_tfc_japan_status, tvb,
568 JAPAN_TFC_STATUS_OFFSET,
569 JAPAN_TFC_STATUS_LENGTH, ENC_LITTLE_ENDIAN);
570 proto_tree_add_item(tree, hf_mtp3mg_tfc_japan_status_spare, tvb,
571 JAPAN_TFC_STATUS_OFFSET,
572 JAPAN_TFC_STATUS_LENGTH, ENC_LITTLE_ENDIAN);
573
574 } else /* ANSI_STANDARD and CHINESE_ITU_STANDARD */ {
575
576 int hf_apc_string;
577
578 if (mtp3_standard == ANSI_STANDARD) {
579
580 hf_apc_string = hf_mtp3mg_ansi_apc;
581
582 } else /* CHINESE_ITU_STANDARD */ {
583
584 hf_apc_string = hf_mtp3mg_chinese_apc;
585 }
586
587 dissect_mtp3_3byte_pc(tvb, 0, tree, ett_mtp3mg_fcm_apc,
588 hf_apc_string, hf_mtp3mg_apc_network,
589 hf_mtp3mg_apc_cluster,
590 hf_mtp3mg_apc_member, 0, 0);
591
592 proto_tree_add_item(tree, hf_mtp3mg_tfc_ansi_status, tvb,
593 ANSI_TFC_STATUS_OFFSET, ANSI_TFC_STATUS_LENGTH,
594 ENC_LITTLE_ENDIAN);
595
596 }
597 break;
598
599 default:
600 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
601 }
602 }
603
604 static void
dissect_mtp3mg_tfm(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)605 dissect_mtp3mg_tfm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
606 guint8 h1)
607 {
608 proto_item *apc_item;
609
610 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
611 val_to_str_const(h1, tfm_h1_message_type_acro_values, "Unknown"));
612
613 switch (h1)
614 {
615 case TFM_H1_TFP:
616 case TFM_H1_TCP:
617 case TFM_H1_TFR:
618 case TFM_H1_TCR:
619 case TFM_H1_TFA:
620 case TFM_H1_TCA:
621 if (mtp3_standard == ANSI_STANDARD) {
622 dissect_mtp3_3byte_pc(tvb, 0, tree, ett_mtp3mg_tfm_apc,
623 hf_mtp3mg_ansi_apc,
624 hf_mtp3mg_apc_network,
625 hf_mtp3mg_apc_cluster,
626 hf_mtp3mg_apc_member, 0, 0);
627
628 } else if (mtp3_standard == JAPAN_STANDARD) {
629 guint8 count, i;
630 guint32 offset;
631
632 if (h1 == TFM_H1_TCP || h1 == TFM_H1_TCR || h1 == TFM_H1_TCA
633 || h1 == TFM_H1_TFR)
634 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
635
636 proto_tree_add_item(tree, hf_mtp3mg_tfm_japan_count, tvb,
637 JAPAN_TFM_COUNT_OFFSET,
638 JAPAN_TFM_COUNT_LENGTH, ENC_LITTLE_ENDIAN);
639
640 count = tvb_get_guint8(tvb, JAPAN_TFM_COUNT_OFFSET);
641 offset = JAPAN_TFM_COUNT_LENGTH;
642 for (i = 0; i < count; i++)
643 {
644 apc_item = proto_tree_add_item(tree, hf_mtp3mg_japan_apc, tvb,
645 offset, JAPAN_PC_LENGTH, ENC_LITTLE_ENDIAN);
646
647 if (mtp3_pc_structured()) {
648 guint32 apc;
649
650 apc = tvb_get_letohs(tvb, offset);
651 proto_item_append_text(apc_item, " (%s)", mtp3_pc_to_str(apc));
652 }
653
654 offset += JAPAN_PC_LENGTH;
655 proto_tree_add_item(tree, hf_mtp3mg_tfm_japan_spare, tvb,
656 offset, JAPAN_PC_LENGTH, ENC_LITTLE_ENDIAN);
657 offset += JAPAN_PC_LENGTH;
658 }
659 } else /* ITU_STANDARD and CHINESE_ITU_STANDARD */ {
660
661 if (h1 == TFM_H1_TCP || h1 == TFM_H1_TCR || h1 == TFM_H1_TCA)
662 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
663 else if (mtp3_standard == ITU_STANDARD)
664 {
665 apc_item = proto_tree_add_item(tree, hf_mtp3mg_itu_apc,
666 tvb, 0, ITU_PC_LENGTH, ENC_LITTLE_ENDIAN);
667
668 if (mtp3_pc_structured()) {
669 guint32 apc;
670
671 apc = tvb_get_letohs(tvb, 0) & ITU_PC_MASK;
672 proto_item_append_text(apc_item, " (%s)", mtp3_pc_to_str(apc));
673 }
674 }
675 else if (mtp3_standard == CHINESE_ITU_STANDARD)
676 dissect_mtp3_3byte_pc(tvb, 0, tree, ett_mtp3mg_tfm_apc,
677 hf_mtp3mg_chinese_apc,
678 hf_mtp3mg_apc_network,
679 hf_mtp3mg_apc_cluster,
680 hf_mtp3mg_apc_member, 0, 0);
681 }
682 break;
683
684 default:
685 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
686 }
687 }
688
689 static void
dissect_mtp3mg_rsm(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)690 dissect_mtp3mg_rsm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
691 guint8 h1)
692 {
693 proto_item *apc_item;
694
695 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
696 val_to_str_const(h1, rsm_h1_message_type_acro_values, "Unknown"));
697
698 switch (h1)
699 {
700 case RSM_H1_RST:
701 case RSM_H1_RSR:
702 case RSM_H1_RCP:
703 case RSM_H1_RCR:
704 if (mtp3_standard == ANSI_STANDARD) {
705 dissect_mtp3_3byte_pc(tvb, 0, tree, ett_mtp3mg_rsm_apc,
706 hf_mtp3mg_ansi_apc,
707 hf_mtp3mg_apc_network,
708 hf_mtp3mg_apc_cluster,
709 hf_mtp3mg_apc_member, 0, 0);
710
711 } else if (mtp3_standard == JAPAN_STANDARD) {
712 if (h1 == RSM_H1_RST) {
713 guint32 offset;
714 guint8 count, i;
715
716 proto_tree_add_item(tree, hf_mtp3mg_rsm_japan_count, tvb,
717 JAPAN_TFM_COUNT_OFFSET,
718 JAPAN_TFM_COUNT_LENGTH, ENC_LITTLE_ENDIAN);
719
720 count = tvb_get_guint8(tvb, JAPAN_TFM_COUNT_OFFSET);
721 offset = JAPAN_TFM_COUNT_LENGTH;
722 for (i = 0; i < count; i++) {
723 apc_item = proto_tree_add_item(tree,
724 hf_mtp3mg_japan_apc,
725 tvb, offset,
726 JAPAN_PC_LENGTH,
727 ENC_LITTLE_ENDIAN);
728 if (mtp3_pc_structured()) {
729 guint32 apc;
730
731 apc = tvb_get_letohs(tvb, 0);
732 proto_item_append_text(apc_item, " (%s)",
733 mtp3_pc_to_str(apc));
734 }
735 offset += JAPAN_PC_LENGTH;
736 proto_tree_add_item(tree, hf_mtp3mg_rsm_japan_spare, tvb,
737 offset, JAPAN_PC_LENGTH,
738 ENC_LITTLE_ENDIAN);
739 offset += JAPAN_PC_LENGTH;
740 }
741 } else
742 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
743
744 } else /* ITU_STANDARD and CHINESE_ITU_STANDARD */ {
745
746 if (h1 == RSM_H1_RST || h1 == RSM_H1_RSR) {
747 if (mtp3_standard == ITU_STANDARD) {
748 apc_item = proto_tree_add_item(tree, hf_mtp3mg_itu_apc,
749 tvb, 0, ITU_PC_LENGTH,
750 ENC_LITTLE_ENDIAN);
751 if (mtp3_pc_structured()) {
752 guint32 apc;
753
754 apc = tvb_get_letohs(tvb, 0) & ITU_PC_MASK;
755 proto_item_append_text(apc_item, " (%s)", mtp3_pc_to_str(apc));
756 }
757 }
758 else /* CHINESE_ITU_STANDARD */
759 dissect_mtp3_3byte_pc(tvb, 0, tree, ett_mtp3mg_rsm_apc,
760 hf_mtp3mg_chinese_apc,
761 hf_mtp3mg_apc_network,
762 hf_mtp3mg_apc_cluster,
763 hf_mtp3mg_apc_member, 0, 0);
764 } else
765 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
766 }
767 break;
768
769 default:
770 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
771 }
772 }
773
774 static void
dissect_mtp3mg_mim(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)775 dissect_mtp3mg_mim(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
776 guint8 h1)
777 {
778 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
779 val_to_str_const(h1, mim_h1_message_type_acro_values, "Unknown"));
780
781 switch (h1)
782 {
783 case MIM_H1_LIN:
784 case MIM_H1_LUN:
785 case MIM_H1_LIA:
786 case MIM_H1_LUA:
787 case MIM_H1_LID:
788 case MIM_H1_LFU:
789 case MIM_H1_LLT:
790 case MIM_H1_LRT:
791 if (mtp3_standard == ANSI_STANDARD)
792 {
793 proto_tree_add_item(tree, hf_mtp3mg_mim_ansi_slc, tvb, 0,
794 ANSI_MIM_LENGTH, ENC_LITTLE_ENDIAN);
795 }
796 /* else: nothing to dissect */
797 break;
798
799 default:
800 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
801 }
802 }
803
804 static void
dissect_mtp3mg_trm(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)805 dissect_mtp3mg_trm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
806 guint8 h1)
807 {
808 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
809 val_to_str_const(h1, trm_h1_message_type_acro_values, "Unknown"));
810
811 switch (h1)
812 {
813 case TRM_H1_TRA:
814 /* nothing to dissect */
815 break;
816 case TRM_H1_TRW:
817 if (mtp3_standard != ANSI_STANDARD)
818 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
819 /* else: nothing to dissect */
820 break;
821
822 default:
823 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
824 }
825 }
826
827 static void
dissect_mtp3mg_dlm(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)828 dissect_mtp3mg_dlm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
829 guint8 h1)
830 {
831 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
832 val_to_str_const(h1, dlm_h1_message_type_acro_values, "Unknown"));
833
834 switch (h1)
835 {
836 case DLM_H1_DLC:
837 if (mtp3_standard == ANSI_STANDARD)
838 {
839 proto_tree_add_item(tree, hf_mtp3mg_dlc_ansi_slc, tvb, 0,
840 ANSI_DLC_LENGTH, ENC_LITTLE_ENDIAN);
841 proto_tree_add_item(tree, hf_mtp3mg_dlc_ansi_link, tvb, 0,
842 ANSI_DLC_LENGTH, ENC_LITTLE_ENDIAN);
843 } else /* ITU_STANDARD and CHINESE_ITU_STANDARD */ {
844 proto_tree_add_item(tree, hf_mtp3mg_dlc_itu_link, tvb, 0,
845 ITU_DLC_LENGTH, ENC_LITTLE_ENDIAN);
846 }
847 break;
848 case DLM_H1_CSS:
849 case DLM_H1_CNS:
850 case DLM_H1_CNP:
851 /* nothing to dissect */
852 break;
853
854 default:
855 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
856 }
857 }
858
859 static void
dissect_mtp3mg_ufc(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)860 dissect_mtp3mg_ufc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
861 guint8 h1)
862 {
863 proto_item *apc_item;
864
865 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
866 val_to_str_const(h1, ufc_h1_message_type_acro_values, "Unknown"));
867
868 switch (h1)
869 {
870 case UFC_H1_UPU:
871 if (mtp3_standard == ANSI_STANDARD
872 || mtp3_standard == CHINESE_ITU_STANDARD) {
873 int hf_apc;
874
875 if (mtp3_standard == ANSI_STANDARD)
876 hf_apc = hf_mtp3mg_ansi_apc;
877 else /* CHINESE_ITU_STANDARD */
878 hf_apc = hf_mtp3mg_chinese_apc;
879
880 dissect_mtp3_3byte_pc(tvb, 0, tree, ett_mtp3mg_upu_apc, hf_apc,
881 hf_mtp3mg_apc_network,
882 hf_mtp3mg_apc_cluster,
883 hf_mtp3mg_apc_member, 0, 0);
884
885 proto_tree_add_item(tree, hf_mtp3mg_upu_user, tvb,
886 ANSI_UPU_USER_OFFSET, UPU_USER_LENGTH, ENC_LITTLE_ENDIAN);
887 proto_tree_add_item(tree, hf_mtp3mg_upu_cause, tvb,
888 ANSI_UPU_USER_OFFSET, UPU_USER_LENGTH, ENC_LITTLE_ENDIAN);
889 } else if (mtp3_standard == ITU_STANDARD) {
890
891 apc_item = proto_tree_add_item(tree, hf_mtp3mg_itu_apc, tvb, 0,
892 ITU_PC_LENGTH, ENC_LITTLE_ENDIAN);
893 if (mtp3_pc_structured()) {
894 guint32 apc;
895
896 apc = tvb_get_letohs(tvb, 0) & ITU_PC_MASK;
897 proto_item_append_text(apc_item, " (%s)", mtp3_pc_to_str(apc));
898 }
899
900 proto_tree_add_item(tree, hf_mtp3mg_upu_user, tvb,
901 ITU_UPU_USER_OFFSET, UPU_USER_LENGTH, ENC_LITTLE_ENDIAN);
902 proto_tree_add_item(tree, hf_mtp3mg_upu_cause, tvb,
903 ITU_UPU_USER_OFFSET, UPU_USER_LENGTH, ENC_LITTLE_ENDIAN);
904 } else { /* JAPAN_STANDARD */
905
906 apc_item = proto_tree_add_item(tree, hf_mtp3mg_japan_apc, tvb,
907 0, JAPAN_PC_LENGTH,
908 ENC_LITTLE_ENDIAN);
909 if (mtp3_pc_structured()) {
910 guint32 apc;
911
912 apc = tvb_get_letohs(tvb, 0);
913 proto_item_append_text(apc_item, " (%s)", mtp3_pc_to_str(apc));
914 }
915
916 proto_tree_add_item(tree, hf_mtp3mg_upu_user, tvb,
917 ITU_UPU_USER_OFFSET, UPU_USER_LENGTH, ENC_LITTLE_ENDIAN);
918 proto_tree_add_item(tree, hf_mtp3mg_upu_cause, tvb,
919 ITU_UPU_USER_OFFSET, UPU_USER_LENGTH, ENC_LITTLE_ENDIAN);
920 }
921 break;
922
923 default:
924 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
925 }
926 }
927
928 static void
dissect_mtp3mg_test(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,guint8 h1)929 dissect_mtp3mg_test(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
930 guint8 h1)
931 {
932 guint8 length;
933
934 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
935 val_to_str_const(h1, test_h1_message_type_acro_values, "Unknown"));
936
937 switch (h1)
938 {
939 case TEST_H1_SLTM:
940 case TEST_H1_SLTA:
941 if (mtp3_standard == ANSI_STANDARD)
942 {
943 proto_tree_add_item(tree, hf_mtp3mg_test_ansi_slc, tvb, 0,
944 TEST_LENGTH, ENC_LITTLE_ENDIAN);
945 }
946
947 proto_tree_add_item(tree, hf_mtp3mg_test_length, tvb, 0, TEST_LENGTH,
948 ENC_LITTLE_ENDIAN);
949
950 length = tvb_get_guint8(tvb, 0) >> TEST_LENGTH_SHIFT;
951 proto_tree_add_item(tree, hf_mtp3mg_test_pattern, tvb, TEST_PATTERN_OFFSET, length, ENC_NA);
952 break;
953
954 default:
955 dissect_mtp3mg_unknown_message(tvb, pinfo, tree);
956 }
957 }
958
959 static int
dissect_mtp3mg(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)960 dissect_mtp3mg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
961 {
962
963 guint8 h0, h1;
964 tvbuff_t *payload_tvb;
965
966 /* Set up structures needed to add the protocol subtree and manage it */
967 proto_item *mtp3mg_item;
968 proto_tree *mtp3mg_tree;
969
970 /* Make entries in Protocol column on summary display */
971 switch(mtp3_standard) {
972 case ITU_STANDARD:
973 col_set_str(pinfo->cinfo, COL_PROTOCOL, "MTP3MG (Int. ITU)");
974 break;
975 case ANSI_STANDARD:
976 col_set_str(pinfo->cinfo, COL_PROTOCOL, "MTP3MG (ANSI)");
977 break;
978 case CHINESE_ITU_STANDARD:
979 col_set_str(pinfo->cinfo, COL_PROTOCOL, "MTP3MG (Chin. ITU)");
980 break;
981 case JAPAN_STANDARD:
982 col_set_str(pinfo->cinfo, COL_PROTOCOL, "MTP3MG (Japan)");
983 break;
984 };
985
986 /* create display subtree for the protocol */
987 mtp3mg_item = proto_tree_add_item(tree, proto_mtp3mg, tvb, 0, -1, ENC_NA);
988 mtp3mg_tree = proto_item_add_subtree(mtp3mg_item, ett_mtp3mg);
989
990 /*
991 * Dissect the message
992 */
993 if(pinfo->match_uint == MTP_SI_MTN || /* ITU */
994 pinfo->match_uint == MTP_SI_MTNS) /* ANSI */
995 { /* Test messages */
996
997 if (mtp3_standard == JAPAN_STANDARD)
998 {
999 guint8 h0h1;
1000 guint16 test_pattern;
1001 proto_item *pattern_item;
1002
1003 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_japan_spare, tvb, 0,
1004 JAPAN_SPARE_LENGTH, ENC_LITTLE_ENDIAN);
1005
1006 h0h1 = tvb_get_guint8(tvb, JAPAN_H0H1_OFFSET);
1007
1008 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_japan_test, tvb,
1009 JAPAN_SPARE_LENGTH, H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1010
1011 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
1012 val_to_str_const(h0h1, japan_test_message_type_acro_values, "Unknown"));
1013
1014 switch (h0h1)
1015 {
1016 case JAPAN_TEST_SRT:
1017 case JAPAN_TEST_SRA:
1018 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_japan_test_spare,
1019 tvb, JAPAN_TEST_SPARE_OFFSET,
1020 JAPAN_TEST_SPARE_LENGTH, ENC_LITTLE_ENDIAN);
1021
1022 test_pattern = tvb_get_letohs(tvb, JAPAN_TEST_PATTERN_OFFSET);
1023 pattern_item = proto_tree_add_item(mtp3mg_tree,
1024 hf_mtp3mg_japan_test_pattern,
1025 tvb,
1026 JAPAN_TEST_PATTERN_OFFSET,
1027 JAPAN_TEST_PATTERN_LENGTH,
1028 ENC_LITTLE_ENDIAN);
1029 proto_item_append_text(pattern_item, " (%s)",
1030 test_pattern == JAPAN_TEST_PATTERN
1031 ? "correct" : "incorrect");
1032 break;
1033
1034 default:
1035 dissect_mtp3mg_unknown_message(tvb, pinfo, mtp3mg_tree);
1036 }
1037
1038 } else { /* not JAPAN */
1039 proto_tree_add_item(mtp3mg_tree, hf_mtp3test_h0, tvb, 0, H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1040 /* H1 is added below */
1041
1042 h0 = tvb_get_guint8(tvb, 0) & H0_MASK;
1043 h1 = (tvb_get_guint8(tvb, 0) & H1_MASK) >> H1_SHIFT;
1044
1045 payload_tvb = tvb_new_subset_remaining(tvb, H0H1_LENGTH);
1046
1047 switch (h0)
1048 {
1049 case TEST_H0_SLT:
1050 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_test_h1, tvb, 0,
1051 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1052 dissect_mtp3mg_test(payload_tvb, pinfo, mtp3mg_tree, h1);
1053 break;
1054
1055 default:
1056 col_set_str(pinfo->cinfo, COL_INFO, "Unknown ");
1057
1058 dissect_mtp3mg_unknown_message(tvb, pinfo, mtp3mg_tree);
1059 } /* switch */
1060
1061 }
1062
1063 } else { /* Real management messages */
1064
1065
1066 if (mtp3_standard == JAPAN_STANDARD)
1067 {
1068 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_japan_spare, tvb, 0,
1069 JAPAN_SPARE_LENGTH, ENC_LITTLE_ENDIAN);
1070
1071 /* Get a tvb w/o the spare byte--it makes for less code below */
1072 tvb = tvb_new_subset_remaining(tvb, JAPAN_SPARE_LENGTH);
1073 }
1074
1075 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_h0, tvb, 0, H0H1_LENGTH,
1076 ENC_LITTLE_ENDIAN);
1077 /* H1 is added below */
1078
1079 h0 = tvb_get_guint8(tvb, 0) & H0_MASK;
1080 h1 = (tvb_get_guint8(tvb, 0) & H1_MASK) >> H1_SHIFT;
1081
1082 payload_tvb = tvb_new_subset_remaining(tvb, H0H1_LENGTH);
1083
1084 switch (h0)
1085 {
1086 case H0_CHM:
1087 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_chm_h1, tvb, 0,
1088 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1089 dissect_mtp3mg_chm(payload_tvb, pinfo, mtp3mg_tree, h1);
1090 break;
1091 case H0_ECM:
1092 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_ecm_h1, tvb, 0,
1093 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1094 dissect_mtp3mg_ecm(payload_tvb, pinfo, mtp3mg_tree, h1);
1095 break;
1096 case H0_FCM:
1097 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_fcm_h1, tvb, 0,
1098 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1099 dissect_mtp3mg_fcm(payload_tvb, pinfo, mtp3mg_tree, h1);
1100 break;
1101 case H0_TFM:
1102 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_tfm_h1, tvb, 0,
1103 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1104 dissect_mtp3mg_tfm(payload_tvb, pinfo, mtp3mg_tree, h1);
1105 break;
1106 case H0_RSM:
1107 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_rsm_h1, tvb, 0,
1108 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1109 dissect_mtp3mg_rsm(payload_tvb, pinfo, mtp3mg_tree, h1);
1110 break;
1111 case H0_MIM:
1112 if (mtp3_standard != JAPAN_STANDARD)
1113 {
1114 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_mim_h1, tvb, 0,
1115 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1116 dissect_mtp3mg_mim(payload_tvb, pinfo, mtp3mg_tree, h1);
1117 } else
1118 dissect_mtp3mg_unknown_message(tvb, pinfo, mtp3mg_tree);
1119 break;
1120 case H0_TRM:
1121 if (mtp3_standard != JAPAN_STANDARD)
1122 {
1123 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_trm_h1, tvb, 0,
1124 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1125 dissect_mtp3mg_trm(payload_tvb, pinfo, mtp3mg_tree, h1);
1126 } else
1127 dissect_mtp3mg_unknown_message(tvb, pinfo, mtp3mg_tree);
1128 break;
1129 case H0_DLM:
1130 if (mtp3_standard != JAPAN_STANDARD)
1131 {
1132 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_dlm_h1, tvb, 0,
1133 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1134 dissect_mtp3mg_dlm(payload_tvb, pinfo, mtp3mg_tree, h1);
1135 } else
1136 dissect_mtp3mg_unknown_message(tvb, pinfo, mtp3mg_tree);
1137 break;
1138 case H0_UFC:
1139 if (mtp3_standard != JAPAN_STANDARD)
1140 {
1141 proto_tree_add_item(mtp3mg_tree, hf_mtp3mg_ufc_h1, tvb, 0,
1142 H0H1_LENGTH, ENC_LITTLE_ENDIAN);
1143 dissect_mtp3mg_ufc(payload_tvb, pinfo, mtp3mg_tree, h1);
1144 } else
1145 dissect_mtp3mg_unknown_message(tvb, pinfo, mtp3mg_tree);
1146 break;
1147
1148 default:
1149 col_set_str(pinfo->cinfo, COL_INFO, "Unknown ");
1150
1151 dissect_mtp3mg_unknown_message(tvb, pinfo, mtp3mg_tree);
1152 } /* switch */
1153 } /* else */
1154
1155 return tvb_captured_length(tvb);
1156 }
1157
1158 void
proto_register_mtp3mg(void)1159 proto_register_mtp3mg(void)
1160 {
1161
1162 /* Setup list of header fields See Section 1.6.1 for details*/
1163 static hf_register_info hf[] = {
1164 { &hf_mtp3mg_h0,
1165 { "H0 (Message Group)", "mtp3mg.h0",
1166 FT_UINT8, BASE_HEX, VALS(h0_message_type_values), H0_MASK,
1167 "Message group identifier", HFILL }},
1168 { &hf_mtp3mg_chm_h1,
1169 { "H1 (Message)", "mtp3mg.h1",
1170 FT_UINT8, BASE_HEX, VALS(chm_h1_message_type_values), H1_MASK,
1171 "Message type", HFILL }},
1172 { &hf_mtp3mg_ecm_h1,
1173 { "H1 (Message)", "mtp3mg.h1",
1174 FT_UINT8, BASE_HEX, VALS(ecm_h1_message_type_values), H1_MASK,
1175 "Message type", HFILL }},
1176 { &hf_mtp3mg_fcm_h1,
1177 { "H1 (Message)", "mtp3mg.h1",
1178 FT_UINT8, BASE_HEX, VALS(fcm_h1_message_type_values), H1_MASK,
1179 "Message type", HFILL }},
1180 { &hf_mtp3mg_tfm_h1,
1181 { "H1 (Message)", "mtp3mg.h1",
1182 FT_UINT8, BASE_HEX, VALS(tfm_h1_message_type_values), H1_MASK,
1183 "Message type", HFILL }},
1184 { &hf_mtp3mg_rsm_h1,
1185 { "H1 (Message)", "mtp3mg.h1",
1186 FT_UINT8, BASE_HEX, VALS(rsm_h1_message_type_values), H1_MASK,
1187 "Message type", HFILL }},
1188 { &hf_mtp3mg_mim_h1,
1189 { "H1 (Message)", "mtp3mg.h1",
1190 FT_UINT8, BASE_HEX, VALS(mim_h1_message_type_values), H1_MASK,
1191 "Message type", HFILL }},
1192 { &hf_mtp3mg_trm_h1,
1193 { "H1 (Message)", "mtp3mg.h1",
1194 FT_UINT8, BASE_HEX, VALS(trm_h1_message_type_values), H1_MASK,
1195 "Message type", HFILL }},
1196 { &hf_mtp3mg_dlm_h1,
1197 { "H1 (Message)", "mtp3mg.h1",
1198 FT_UINT8, BASE_HEX, VALS(dlm_h1_message_type_values), H1_MASK,
1199 "Message type", HFILL }},
1200 { &hf_mtp3mg_ufc_h1,
1201 { "H1 (Message)", "mtp3mg.h1",
1202 FT_UINT8, BASE_HEX, VALS(ufc_h1_message_type_values), H1_MASK,
1203 "Message type", HFILL }},
1204 { &hf_mtp3mg_coo_ansi_slc,
1205 { "Signalling Link Code", "mtp3mg.slc",
1206 FT_UINT8, BASE_DEC, NULL, ANSI_COO_SLC_MASK,
1207 "SLC of affected link", HFILL }},
1208 { &hf_mtp3mg_coo_ansi_fsn,
1209 { "Forward Sequence Number", "mtp3mg.fsn",
1210 FT_UINT8, BASE_DEC, NULL, ANSI_COO_FSN_MASK,
1211 "Forward Sequence Number of last accepted message", HFILL }},
1212 { &hf_mtp3mg_coo_itu_fsn,
1213 { "Forward Sequence Number", "mtp3mg.fsn",
1214 FT_UINT8, BASE_DEC, NULL, ITU_COO_FSN_MASK,
1215 "Forward Sequence Number of last accepted message", HFILL }},
1216 { &hf_mtp3mg_xco_ansi_slc,
1217 { "Signalling Link Code", "mtp3mg.slc",
1218 FT_UINT32, BASE_DEC, NULL, ANSI_XCO_SLC_MASK,
1219 "SLC of affected link", HFILL }},
1220 { &hf_mtp3mg_xco_ansi_fsn,
1221 { "Forward Sequence Number", "mtp3mg.fsn",
1222 FT_UINT32, BASE_DEC, NULL, ANSI_XCO_FSN_MASK,
1223 "Forward Sequence Number of last accepted message", HFILL }},
1224 { &hf_mtp3mg_xco_itu_fsn,
1225 { "Forward Sequence Number", "mtp3mg.fsn",
1226 FT_UINT24, BASE_DEC, NULL, 0x0,
1227 "Forward Sequence Number of last accepted message", HFILL }},
1228 { &hf_mtp3mg_cbd_ansi_slc,
1229 { "Signalling Link Code", "mtp3mg.slc",
1230 FT_UINT16, BASE_DEC, NULL, ANSI_CBD_SLC_MASK,
1231 "SLC of affected link", HFILL }},
1232 { &hf_mtp3mg_cbd_ansi_cbc,
1233 { "Change Back Code", "mtp3mg.cbc",
1234 FT_UINT16, BASE_DEC, NULL, ANSI_CBD_CBC_MASK,
1235 NULL, HFILL }},
1236 { &hf_mtp3mg_cbd_itu_cbc,
1237 { "Change Back Code", "mtp3mg.cbc",
1238 FT_UINT8, BASE_DEC, NULL, 0x0,
1239 NULL, HFILL }},
1240 { &hf_mtp3mg_cbd_japan_cbc,
1241 { "Change Back Code", "mtp3mg.cbc",
1242 FT_UINT8, BASE_DEC, NULL, JAPAN_CBD_CBC_MASK,
1243 NULL, HFILL }},
1244 { &hf_mtp3mg_eco_ansi_slc,
1245 { "Signalling Link Code", "mtp3mg.slc",
1246 FT_UINT8, BASE_DEC, NULL, ANSI_ECO_SLC_MASK,
1247 "SLC of affected link", HFILL }},
1248 { &hf_mtp3mg_ansi_apc,
1249 { "Affected Point Code", "mtp3mg.ansi_apc",
1250 FT_STRING, BASE_NONE, NULL, 0x0,
1251 NULL, HFILL }},
1252 { &hf_mtp3mg_apc_member,
1253 { "Affected Point Code member", "mtp3mg.apc.member",
1254 FT_UINT24, BASE_DEC, NULL, ANSI_MEMBER_MASK,
1255 NULL, HFILL }},
1256 { &hf_mtp3mg_apc_cluster,
1257 { "Affected Point Code cluster", "mtp3mg.apc.cluster",
1258 FT_UINT24, BASE_DEC, NULL, ANSI_CLUSTER_MASK,
1259 NULL, HFILL }},
1260 { &hf_mtp3mg_apc_network,
1261 { "Affected Point Code network", "mtp3mg.apc.network",
1262 FT_UINT24, BASE_DEC, NULL, ANSI_NETWORK_MASK,
1263 NULL, HFILL }},
1264 { &hf_mtp3mg_tfc_ansi_status,
1265 { "Status", "mtp3mg.status",
1266 FT_UINT8, BASE_DEC, NULL, ANSI_TFC_STATUS_MASK,
1267 "Congestion status", HFILL }},
1268 { &hf_mtp3mg_itu_apc,
1269 { "Affected Point Code (ITU)", "mtp3mg.apc",
1270 FT_UINT16, BASE_DEC, NULL, ITU_PC_MASK,
1271 NULL, HFILL }},
1272 { &hf_mtp3mg_tfc_itu_status,
1273 { "Status", "mtp3mg.status",
1274 FT_UINT8, BASE_DEC, NULL, ITU_TFC_STATUS_MASK,
1275 "Congestion status", HFILL }},
1276 { &hf_mtp3mg_chinese_apc,
1277 { "Affected Point Code", "mtp3mg.chinese_apc",
1278 FT_STRING, BASE_NONE, NULL, 0x0,
1279 NULL, HFILL }},
1280 { &hf_mtp3mg_tfc_japan_spare,
1281 { "TFC spare (Japan)", "mtp3mg.japan_spare",
1282 FT_UINT8, BASE_HEX, NULL, 0x0,
1283 NULL, HFILL }},
1284 { &hf_mtp3mg_japan_apc,
1285 { "Affected Point Code", "mtp3mg.japan_apc",
1286 FT_UINT16, BASE_DEC, NULL, 0x0,
1287 NULL, HFILL }},
1288 { &hf_mtp3mg_tfc_japan_status,
1289 { "Status", "mtp3mg.japan_status",
1290 FT_UINT8, BASE_DEC, NULL, JAPAN_TFC_STATUS_MASK,
1291 NULL, HFILL }},
1292 { &hf_mtp3mg_tfc_japan_status_spare,
1293 { "Spare (Japan)", "mtp3mg.japan_spare",
1294 FT_UINT8, BASE_HEX, NULL, JAPAN_TFC_STATUS_SPARE_MASK,
1295 NULL, HFILL }},
1296 { &hf_mtp3mg_tfm_japan_count,
1297 { "Count of Affected Point Codes (Japan)", "mtp3mg.japan_count",
1298 FT_UINT8, BASE_DEC, NULL, 0x0,
1299 NULL, HFILL }},
1300 { &hf_mtp3mg_tfm_japan_spare,
1301 { "Spare (Japan)", "mtp3mg.japan_spare",
1302 FT_UINT16, BASE_DEC, NULL, 0x0,
1303 NULL, HFILL }},
1304 { &hf_mtp3mg_rsm_japan_count,
1305 { "Count of Affected Point Codes (Japan)", "mtp3mg.japan_count",
1306 FT_UINT8, BASE_DEC, NULL, 0x0,
1307 NULL, HFILL }},
1308 { &hf_mtp3mg_rsm_japan_spare,
1309 { "Spare (Japan)", "mtp3mg.japan_spare",
1310 FT_UINT16, BASE_DEC, NULL, 0x0,
1311 NULL, HFILL }},
1312 { &hf_mtp3mg_mim_ansi_slc,
1313 { "Signalling Link Code", "mtp3mg.slc",
1314 FT_UINT8, BASE_DEC, NULL, ANSI_MIM_SLC_MASK,
1315 "SLC of affected link", HFILL }},
1316 { &hf_mtp3mg_dlc_ansi_slc,
1317 { "Signalling Link Code", "mtp3mg.slc",
1318 FT_UINT8, BASE_DEC, NULL, ANSI_DLC_SLC_MASK,
1319 "SLC of affected link", HFILL }},
1320 { &hf_mtp3mg_dlc_ansi_link,
1321 { "Link", "mtp3mg.link",
1322 FT_UINT8, BASE_DEC, NULL, ANSI_DLC_LINK_MASK,
1323 "CIC of BIC used to carry data", HFILL }},
1324 { &hf_mtp3mg_dlc_itu_link,
1325 { "Link", "mtp3mg.link",
1326 FT_UINT8, BASE_DEC, NULL, ITU_DLC_LINK_MASK,
1327 "CIC of BIC used to carry data", HFILL }},
1328 { &hf_mtp3mg_upu_user,
1329 { "User", "mtp3mg.user",
1330 FT_UINT8, BASE_HEX, VALS(service_indicator_code_vals), UPU_USER_MASK,
1331 "Unavailable user part", HFILL }},
1332 { &hf_mtp3mg_upu_cause,
1333 { "Cause", "mtp3mg.cause",
1334 FT_UINT8, BASE_HEX, VALS(upu_cause_values), UPU_CAUSE_MASK,
1335 "Cause of user unavailability", HFILL }},
1336 { &hf_mtp3test_h0,
1337 { "H0 (Message Group)", "mtp3mg.test.h0",
1338 FT_UINT8, BASE_HEX, VALS(test_h0_message_type_values), H0_MASK,
1339 "Message group identifier", HFILL }},
1340 { &hf_mtp3mg_test_h1,
1341 { "H1 (Message)", "mtp3mg.test.h1",
1342 FT_UINT8, BASE_HEX, VALS(test_h1_message_type_values), H1_MASK,
1343 "SLT message type", HFILL }},
1344 { &hf_mtp3mg_test_length,
1345 { "Test length", "mtp3mg.test.length",
1346 FT_UINT8, BASE_DEC, NULL, H1_MASK,
1347 "Signalling link test pattern length", HFILL }},
1348 { &hf_mtp3mg_japan_test,
1349 { "Japan test message", "mtp3mg.test",
1350 FT_UINT8, BASE_HEX, VALS(japan_test_message_type_values), 0x0,
1351 "Japan test message type", HFILL }},
1352 { &hf_mtp3mg_japan_test_spare,
1353 { "Japan test message spare", "mtp3mg.test.spare",
1354 FT_UINT8, BASE_HEX, NULL, 0x0,
1355 NULL, HFILL }},
1356 { &hf_mtp3mg_japan_test_pattern,
1357 { "Japan test message pattern", "mtp3mg.test.pattern",
1358 FT_UINT16, BASE_HEX, NULL, 0x0,
1359 NULL, HFILL }},
1360 { &hf_mtp3mg_japan_spare,
1361 { "Japan management spare", "mtp3mg.spare",
1362 FT_UINT8, BASE_HEX, NULL, 0x0,
1363 NULL, HFILL }},
1364 { &hf_mtp3mg_test_ansi_slc,
1365 { "Signalling Link Code", "mtp3mg.slc",
1366 FT_UINT8, BASE_DEC, NULL, ANSI_TEST_SLC_MASK,
1367 "SLC of affected link", HFILL }},
1368 { &hf_mtp3mg_test_pattern,
1369 { "Test pattern", "mtp3mg.test_pattern",
1370 FT_BYTES, BASE_NONE, NULL, 0x0,
1371 NULL, HFILL }},
1372 };
1373
1374 /* Setup protocol subtree array */
1375 static gint *ett[] = {
1376 &ett_mtp3mg,
1377 &ett_mtp3mg_fcm_apc,
1378 &ett_mtp3mg_tfm_apc,
1379 &ett_mtp3mg_rsm_apc,
1380 &ett_mtp3mg_upu_apc
1381 };
1382
1383 static ei_register_info ei[] = {
1384 { &ei_mtp3mg_unknown_message, { "mtp3mg.unknown_message", PI_PROTOCOL, PI_WARN, "Unknown message", EXPFILL }},
1385 };
1386
1387 expert_module_t* expert_mtp3mg;
1388
1389 /* Register the protocol name and description */
1390 proto_mtp3mg = proto_register_protocol("Message Transfer Part Level 3 Management",
1391 "MTP3MG", "mtp3mg");
1392 mtp3mg_handle = register_dissector("mtp3mg", dissect_mtp3mg, proto_mtp3mg);
1393
1394 /* Required calls to register the header fields and subtrees used */
1395 proto_register_field_array(proto_mtp3mg, hf, array_length(hf));
1396 proto_register_subtree_array(ett, array_length(ett));
1397 expert_mtp3mg = expert_register_protocol(proto_mtp3mg);
1398 expert_register_field_array(expert_mtp3mg, ei, array_length(ei));
1399
1400 }
1401
1402 void
proto_reg_handoff_mtp3mg(void)1403 proto_reg_handoff_mtp3mg(void)
1404 {
1405 dissector_add_uint("mtp3.service_indicator", MTP_SI_SNM, mtp3mg_handle);
1406
1407 /* SI 1 is unused in ANSI and SI 2 is unused in ITU, so it's okay for us
1408 * to grab both (regardless of mtp3.standard setting) here.
1409 */
1410 dissector_add_uint("mtp3.service_indicator", MTP_SI_MTN, mtp3mg_handle);
1411 dissector_add_uint("mtp3.service_indicator", MTP_SI_MTNS, mtp3mg_handle);
1412 }
1413
1414 /*
1415 * Editor modelines - https://www.wireshark.org/tools/modelines.html
1416 *
1417 * Local variables:
1418 * c-basic-offset: 4
1419 * tab-width: 8
1420 * indent-tabs-mode: nil
1421 * End:
1422 *
1423 * vi: set shiftwidth=4 tabstop=8 expandtab:
1424 * :indentSize=4:tabSize=8:noTabs=true:
1425 */
1426