1 /* packet-q933.c
2 * Routines for Q.933 frame disassembly
3 * Guy Harris <guy@alum.mit.edu>
4 *
5 * Wireshark - Network traffic analyzer
6 * By Gerald Combs <gerald@wireshark.org>
7 * Copyright 1998
8 *
9 * SPDX-License-Identifier: GPL-2.0-or-later
10 */
11
12 #include "config.h"
13
14 #include <epan/packet.h>
15 #include <epan/expert.h>
16 #include <epan/nlpid.h>
17 #include "packet-juniper.h"
18
19 void proto_register_q933(void);
20 void proto_reg_handoff_q933(void);
21
22 static int proto_q933 = -1;
23 static int hf_q933_discriminator = -1;
24 static int hf_q933_coding_standard = -1;
25 static int hf_q933_information_transfer_capability = -1;
26 static int hf_q933_transfer_mode = -1;
27 static int hf_q933_uil1 = -1;
28 static int hf_q933_call_ref_len = -1;
29 static int hf_q933_call_ref_flag = -1;
30 static int hf_q933_call_ref = -1;
31 static int hf_q933_message_type = -1;
32 static int hf_q933_cause_location = -1;
33 static int hf_q933_cause_value = -1;
34 static int hf_q933_number_type = -1;
35 static int hf_q933_numbering_plan = -1;
36 static int hf_q933_extension_ind = -1;
37 static int hf_q933_calling_party_number = -1;
38 static int hf_q933_called_party_number = -1;
39 static int hf_q933_connected_number = -1;
40 /* static int hf_q933_redirecting_number = -1; */
41 static int hf_q933_screening_ind = -1;
42 static int hf_q933_presentation_ind = -1;
43 static int hf_q933_report_type = -1;
44 static int hf_q933_link_verf_txseq = -1;
45 static int hf_q933_link_verf_rxseq = -1;
46 static int hf_q933_data = -1;
47
48 /* Generated from convert_proto_tree_add_text.pl */
49 static int hf_q933_user_information_layer_3_protocol = -1;
50 static int hf_q933_additional_layer_3_protocol_information = -1;
51 static int hf_q933_network_identification_plan = -1;
52 static int hf_q933_map_element_type = -1;
53 static int hf_q933_channel_type = -1;
54 static int hf_q933_channel_indicated_by = -1;
55 static int hf_q933_extended_audiovisual_characteristics_id = -1;
56 static int hf_q933_location = -1;
57 static int hf_q933_subaddress = -1;
58 static int hf_q933_type_of_network_identification = -1;
59 static int hf_q933_address_inclusion = -1;
60 static int hf_q933_odd_even_indicator = -1;
61 static int hf_q933_reverse_charging_indication = -1;
62 static int hf_q933_call_state = -1;
63 static int hf_q933_user_information_layer_2_protocol = -1;
64 static int hf_q933_packet_window_size = -1;
65 static int hf_q933_locking_shift_to_codeset = -1;
66 static int hf_q933_non_locking_shift_to_codeset = -1;
67 static int hf_q933_not_first_segment = -1;
68 static int hf_q933_user_rate = -1;
69 static int hf_q933_indicated_channel_required = -1;
70 static int hf_q933_high_layer_characteristics_identification = -1;
71 static int hf_q933_rejection_reason = -1;
72 static int hf_q933_progress_description = -1;
73 static int hf_q933_parity = -1;
74 static int hf_q933_extended_high_layer_characteristics_id = -1;
75 static int hf_q933_dlci = -1;
76 static int hf_q933_recommendation = -1;
77 static int hf_q933_mode = -1;
78 static int hf_q933_user_information_str = -1;
79 static int hf_q933_network_service = -1;
80 static int hf_q933_interface_basic = -1;
81 static int hf_q933_missing_information_element = -1;
82 static int hf_q933_information_element = -1;
83 static int hf_q933_condition_normal = -1;
84 static int hf_q933_not_channel_selection = -1;
85 static int hf_q933_network_identification_length = -1;
86 static int hf_q933_segmented_message_type = -1;
87 static int hf_q933_diagnostic = -1;
88 static int hf_q933_user_specified_layer_2_protocol_information = -1;
89 static int hf_q933_interface_identified = -1;
90 static int hf_q933_network_specific_facility_specification = -1;
91 static int hf_q933_data_bits = -1;
92 static int hf_q933_default_packet_size = -1;
93 static int hf_q933_insufficient_information_element = -1;
94 static int hf_q933_modem_type = -1;
95 static int hf_q933_user_information_bytes = -1;
96 static int hf_q933_multiple_frame_establishment = -1;
97 static int hf_q933_duplex = -1;
98 static int hf_q933_mode_of_operation = -1;
99 static int hf_q933_condition = -1;
100 static int hf_q933_status = -1;
101 static int hf_q933_repeat_indicator = -1;
102 static int hf_q933_confirmation = -1;
103 static int hf_q933_default_packet_size_0F = -1;
104 static int hf_q933_interface_identifier = -1;
105 static int hf_q933_stop_bits = -1;
106 static int hf_q933_indicated_channel_d_channel = -1;
107 static int hf_q933_channel_selection = -1;
108 static int hf_q933_user_specific_diagnostic = -1;
109 static int hf_q933_timer = -1;
110 static int hf_q933_first_segment = -1;
111 static int hf_q933_network_identification = -1;
112 static int hf_q933_out_band_negotiation = -1;
113 static int hf_q933_layer_1 = -1;
114 static int hf_q933_type_of_subaddress = -1;
115 static int hf_q933_protocol_discriminator = -1;
116 static int hf_q933_rate_adaption_header = -1;
117 static int hf_q933_reason_for_redirection = -1;
118 static int hf_q933_length = -1;
119 static int hf_q933_diagnostics = -1;
120 static int hf_q933_display_information = -1;
121 static int hf_q933_cumulative_transit_delay = -1;
122 static int hf_q933_requested_end_to_end_transit_delay = -1;
123 static int hf_q933_max_end_to_end_transit_delay = -1;
124 static int hf_q933_transit_delay = -1;
125 static int hf_q933_request = -1;
126
127 static gint ett_q933 = -1;
128 static gint ett_q933_ie = -1;
129
130 static expert_field ei_q933_invalid_length = EI_INIT;
131 static expert_field ei_q933_information_element = EI_INIT;
132
133 static dissector_handle_t q933_handle;
134
135 /*
136 * Q.933 message types.
137 */
138 #define Q933_ESCAPE 0x00
139 #define Q933_ALERTING 0x01
140 #define Q933_CALL_PROCEEDING 0x02
141 #define Q933_CONNECT 0x07
142 #define Q933_CONNECT_ACK 0x0F
143 #define Q933_PROGRESS 0x03
144 #define Q933_SETUP 0x05
145 #define Q933_DISCONNECT 0x45
146 #define Q933_RELEASE 0x4D
147 #define Q933_RELEASE_COMPLETE 0x5A
148 #define Q933_SEGMENT 0x60
149 #define Q933_STATUS 0x7D
150 #define Q933_STATUS_ENQUIRY 0x75
151
152 static const value_string q933_message_type_vals[] = {
153 { Q933_ESCAPE, "ESCAPE" },
154 { Q933_ALERTING, "ALERTING" },
155 { Q933_CALL_PROCEEDING, "CALL PROCEEDING" },
156 { Q933_CONNECT, "CONNECT" },
157 { Q933_CONNECT_ACK, "CONNECT ACKNOWLEDGE" },
158 { Q933_PROGRESS, "PROGRESS" },
159 { Q933_SETUP, "SETUP" },
160 { Q933_DISCONNECT, "DISCONNECT" },
161 { Q933_RELEASE, "RELEASE" },
162 { Q933_RELEASE_COMPLETE, "RELEASE COMPLETE" },
163 { Q933_SEGMENT, "SEGMENT" },
164 { Q933_STATUS, "STATUS" },
165 { Q933_STATUS_ENQUIRY, "STATUS ENQUIRY" },
166 { 0, NULL }
167 };
168
169 static const true_false_string tfs_call_ref_flag = {
170 "Message sent to originating side",
171 "Message sent from originating side"
172 };
173
174 /*
175 * Information elements.
176 */
177
178 /* Shifted codeset values */
179 #define CS0 0x000
180 #define CS1 0x100
181 #define CS2 0x200
182 #define CS3 0x300
183 #define CS4 0x400
184 #define CS5 0x500
185 #define CS6 0x600
186 #define CS7 0x700
187
188 #define Q933_IE_SO_MASK 0x80 /* single-octet/variable-length mask */
189 /*
190 * Single-octet IEs.
191 */
192 #define Q933_IE_SO_IDENTIFIER_MASK 0xf0 /* IE identifier mask */
193 #define Q933_IE_SO_IDENTIFIER_SHIFT 4 /* IE identifier shift */
194 #define Q933_IE_SO_IE_MASK 0x0F /* IE mask */
195
196 #define Q933_IE_SHIFT 0x90
197 #define Q933_IE_SHIFT_NON_LOCKING 0x08 /* non-locking shift */
198 #define Q933_IE_SHIFT_CODESET 0x07 /* codeset */
199
200 #define Q933_IE_REPEAT_INDICATOR 0xD0
201
202 /*
203 * Variable-length IEs.
204 */
205 #define Q933_IE_VL_EXTENSION 0x80 /* Extension flag */
206 /* extension bit. The bit value "0" indicates that the octet continues through the */
207 /* next octet. The bit value "1" indicates that this octet is the last octet */
208
209 static const true_false_string q933_extension_ind_value = {
210 "last octet",
211 "information continues through the next octet",
212
213 };
214
215
216 /*
217 * Codeset 0 (default).
218 */
219 #define Q933_IE_SEGMENTED_MESSAGE 0x00
220 #define Q933_IE_BEARER_CAPABILITY 0x04
221 #define Q933_IE_CAUSE 0x08
222 #define Q933_IE_CALL_STATE 0x14
223 #define Q933_IE_CHANNEL_IDENTIFICATION 0x18
224 #define Q933_IE_DLCI 0x19
225 #define Q933_IE_PROGRESS_INDICATOR 0x1E
226 #define Q933_IE_NETWORK_SPECIFIC_FACIL 0x20 /* Network Specific Facilities */
227 #define Q933_IE_DISPLAY 0x28
228 #define Q933_IE_E2E_TRANSIT_DELAY 0x42 /* End-to-end Transit Delay */
229 #define Q933_IE_TD_SELECTION_AND_INT 0x43 /* Transit Delay Selection and Indication */
230 #define Q933_IE_PL_BINARY_PARAMETERS 0x44 /* Packet layer binary parameters */
231 #define Q933_IE_LL_CORE_PARAMETERS 0x48 /* Link layer core parameters */
232 #define Q933_IE_LL_PROTOCOL_PARAMETERS 0x49 /* Link layer protocol parameters */
233 #define Q933_IE_REVERSE_CHARGE_IND 0x4A /* Reverse charging indication */
234 #define Q933_IE_CONNECTED_NUMBER 0x4C /* Connected Number */
235 #define Q933_IE_CONNECTED_SUBADDR 0x4D /* Connected sub-address */
236 #define Q933_IE_X_213_PRIORITY 0x50 /* X.213 priority */
237 #define Q933_IE_REPORT_TYPE 0x51
238 #define Q933_IE_LINK_INTEGRITY_VERF 0x53 /* Link integrity verification */
239 #define Q933_IE_PVC_STATUS 0x57
240 #define Q933_IE_CALLING_PARTY_NUMBER 0x6C /* Calling Party Number */
241 #define Q933_IE_CALLING_PARTY_SUBADDR 0x6D /* Calling Party Subaddress */
242 #define Q933_IE_CALLED_PARTY_NUMBER 0x70 /* Called Party Number */
243 #define Q933_IE_CALLED_PARTY_SUBADDR 0x71 /* Called Party Subaddress */
244 #define Q933_IE_TRANSIT_NETWORK_SEL 0x78 /* Transit Network Selection */
245 #define Q933_IE_LOW_LAYER_COMPAT 0x7C /* Low-Layer Compatibility */
246 #define Q933_IE_HIGH_LAYER_COMPAT 0x7D /* High-Layer Compatibility */
247 #define Q933_IE_USER_USER 0x7E /* User-User */
248 #define Q933_IE_ESCAPE 0x7F /* Escape for extension */
249
250 /* Codeset 0 */
251 static const value_string q933_info_element_vals0[] = {
252 { Q933_IE_SEGMENTED_MESSAGE, "Segmented message" },
253 { Q933_IE_BEARER_CAPABILITY, "Bearer capability" },
254 { Q933_IE_CAUSE, "Cause" },
255 { Q933_IE_CALL_STATE, "Call state" },
256 { Q933_IE_CHANNEL_IDENTIFICATION, "Channel identification" },
257 { Q933_IE_DLCI, "Data link connection identifier" },
258 { Q933_IE_PROGRESS_INDICATOR, "Progress indicator" },
259 { Q933_IE_NETWORK_SPECIFIC_FACIL, "Network specific facilities" },
260 { Q933_IE_E2E_TRANSIT_DELAY, "End-to-end transit delay" },
261 { Q933_IE_TD_SELECTION_AND_INT, "Transit delay selection and indication" },
262 { Q933_IE_PL_BINARY_PARAMETERS, "Packet layer binary parameters" },
263 { Q933_IE_LL_CORE_PARAMETERS, "Link layer core parameters" },
264 { Q933_IE_LL_PROTOCOL_PARAMETERS, "Link layer protocol parameters" },
265 { Q933_IE_REVERSE_CHARGE_IND, "Reverse charging indication" },
266 { Q933_IE_CONNECTED_NUMBER, "Connected number" },
267 { Q933_IE_CONNECTED_SUBADDR, "Connected subaddress" },
268 { Q933_IE_X_213_PRIORITY, "X.213 priority" },
269 { Q933_IE_REPORT_TYPE, "Report type" },
270 { Q933_IE_LINK_INTEGRITY_VERF, "Link integrity verification" },
271 { Q933_IE_PVC_STATUS, "PVC status" },
272 { Q933_IE_CALLING_PARTY_NUMBER, "Calling party number" },
273 { Q933_IE_CALLING_PARTY_SUBADDR, "Calling party subaddress" },
274 { Q933_IE_CALLED_PARTY_NUMBER, "Called party number" },
275 { Q933_IE_CALLED_PARTY_SUBADDR, "Called party subaddress" },
276 { Q933_IE_TRANSIT_NETWORK_SEL, "Transit network selection" },
277 { Q933_IE_LOW_LAYER_COMPAT, "Low-layer compatibility" },
278 { Q933_IE_HIGH_LAYER_COMPAT, "High-layer compatibility" },
279 { Q933_IE_USER_USER, "User-user" },
280 { Q933_IE_ESCAPE, "Escape" },
281 { 0, NULL }
282 };
283 /* Codeset 1 */
284 static const value_string q933_info_element_vals1[] = {
285 { 0, NULL }
286 };
287 /* Codeset 2 */
288 static const value_string q933_info_element_vals2[] = {
289 { 0, NULL }
290 };
291 /* Codeset 3 */
292 static const value_string q933_info_element_vals3[] = {
293 { 0, NULL }
294 };
295 /* Codeset 4 */
296 static const value_string q933_info_element_vals4[] = {
297 { 0, NULL }
298 };
299
300 /* Codeset 5 */
301 #define Q933_IE_ANSI_REPORT_TYPE 0x01
302 #define Q933_IE_ANSI_LINK_INTEGRITY_VERF 0x03
303 #define Q933_IE_ANSI_PVC_STATUS 0x07
304
305 /* Codeset 5 */
306 static const value_string q933_info_element_vals5[] = {
307 { Q933_IE_ANSI_REPORT_TYPE, "Report type (ANSI)" },
308 { Q933_IE_REPORT_TYPE, "Report type (CCITT)" },
309 { Q933_IE_ANSI_LINK_INTEGRITY_VERF, "Keep Alive (ANSI)" },
310 { Q933_IE_LINK_INTEGRITY_VERF, "Keep Alive (CCITT)" },
311 { Q933_IE_ANSI_PVC_STATUS, "PVC Status (ANSI)" },
312 { Q933_IE_PVC_STATUS, "PVC Status (CCITT)" },
313 { 0, NULL }
314 };
315 /* Codeset 6 */
316 static const value_string q933_info_element_vals6[] = {
317 { 0, NULL }
318 };
319 /* Codeset 7 */
320 static const value_string q933_info_element_vals7[] = {
321 { 0, NULL }
322 };
323
324 /* Codeset array */
325 #define NUM_INFO_ELEMENT_VALS (Q933_IE_SHIFT_CODESET+1)
326 static const value_string *q933_info_element_vals[NUM_INFO_ELEMENT_VALS] = {
327 q933_info_element_vals0,
328 q933_info_element_vals1,
329 q933_info_element_vals2,
330 q933_info_element_vals3,
331 q933_info_element_vals4,
332 q933_info_element_vals5,
333 q933_info_element_vals6,
334 q933_info_element_vals7,
335 };
336
337 static const value_string q933_repeat_indication_vals[] = {
338 { 0x2, "Prioritized list" },
339 { 0, NULL }
340 };
341
342 /*
343 * ITU-standardized coding.
344 */
345 #define Q933_ITU_STANDARDIZED_CODING 0x00
346
347 /*
348 * Dissect a Segmented message information element.
349 */
350 static void
dissect_q933_segmented_message_ie(tvbuff_t * tvb,packet_info * pinfo,int offset,int len,proto_tree * tree)351 dissect_q933_segmented_message_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
352 proto_tree *tree)
353 {
354 guint8 octet;
355 if (len != 2) {
356 proto_tree_add_expert_format(tree, pinfo, &ei_q933_invalid_length, tvb, offset, len, "Segmented message: length is %d, should be 2", len);
357 return;
358 }
359
360 octet = tvb_get_guint8(tvb, offset);
361 if (octet & 0x80) {
362 proto_tree_add_item(tree, hf_q933_first_segment, tvb, offset, 1, ENC_NA);
363 } else {
364 proto_tree_add_item(tree, hf_q933_not_first_segment, tvb, offset, 1, ENC_NA);
365 }
366 proto_tree_add_item(tree, hf_q933_segmented_message_type, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
367 }
368
369 /*
370 * Dissect a Bearer capability or Low-layer compatibility information element.
371 */
372 static const value_string q933_coding_standard_vals[] = {
373 { 0x0, "ITU-T standardized coding" },
374 { 0x1, "ISO/IEC standard" },
375 { 0x2, "National standard" },
376 { 0x3, "Standard defined for this particular network" },
377 { 0, NULL }
378 };
379
380 static const value_string q933_information_transfer_capability_vals[] = {
381 { 0x08, "Unrestricted digital information" },
382 { 0, NULL }
383 };
384
385 static const value_string q933_transfer_mode_vals[] = {
386 { 0x01, "Frame mode" },
387 { 0, NULL }
388 };
389
390 static const value_string q933_uil1_vals[] = {
391 { 0x01, "V.110/I.460/X.30 rate adaption" },
392 { 0x02, "Recommendation G.711 u-law" },
393 { 0x03, "Recommendation G.711 A-law" },
394 { 0x04, "Recommendation G.721 32 kbit/s ADPCM and Recommendation I.460" },
395 { 0x05, "Recommendation H.221 and H.242" },
396 { 0x06, "Recommendation H.223 and H.245" },
397 { 0x07, "Non-ITU-T-standardized rate adaption" },
398 { 0x08, "V.120 rate adaption" },
399 { 0x09, "X.31 HDLC flag stuffing" },
400 { 0, NULL },
401 };
402
403 static const value_string q933_l1_user_rate_vals[] = {
404 { 0x00, "Rate indicated by E-bits" },
405 { 0x01, "0.6 kbit/s" },
406 { 0x02, "1.2 kbit/s" },
407 { 0x03, "2.4 kbit/s" },
408 { 0x04, "3.6 kbit/s" },
409 { 0x05, "4.8 kbit/s" },
410 { 0x06, "7.2 kbit/s" },
411 { 0x07, "8 kbit/s" },
412 { 0x08, "9.6 kbit/s" },
413 { 0x09, "14.4 kbit/s" },
414 { 0x0A, "16 kbit/s" },
415 { 0x0B, "19.2 kbit/s" },
416 { 0x0C, "32 kbit/s" },
417 { 0x0E, "48 kbit/s" },
418 { 0x0F, "56 kbit/s" },
419 { 0x10, "64 kbit/s "},
420 { 0x15, "0.1345 kbit/s" },
421 { 0x16, "0.100 kbit/s" },
422 { 0x17, "0.075/1.2 kbit/s" },
423 { 0x18, "1.2/0.075 kbit/s" },
424 { 0x19, "0.050 kbit/s" },
425 { 0x1A, "0.075 kbit/s" },
426 { 0x1B, "0.110 kbit/s" },
427 { 0x1C, "0.150 kbit/s" },
428 { 0x1D, "0.200 kbit/s" },
429 { 0x1E, "0.300 kbit/s" },
430 { 0x1F, "12 kbit/s" },
431 { 0, NULL }
432 };
433
434 static const value_string q933_l1_stop_bits_vals[] = {
435 { 0x20, "1" },
436 { 0x40, "1.5" },
437 { 0x60, "2" },
438 { 0, NULL }
439 };
440
441 static const value_string q933_l1_data_bits_vals[] = {
442 { 0x08, "5" },
443 { 0x10, "7" },
444 { 0x18, "8" },
445 { 0, NULL }
446 };
447
448 static const value_string q933_l1_parity_vals[] = {
449 { 0x00, "Odd" },
450 { 0x02, "Even" },
451 { 0x03, "None" },
452 { 0x04, "Forced to 0" },
453 { 0x05, "Forced to 1" },
454 { 0, NULL }
455 };
456
457 #define Q933_UIL2_USER_SPEC 0x10
458
459 static const value_string q933_uil2_vals[] = {
460 { 0x01, "Basic mode ISO 1745" },
461 { 0x06, "X.25, link level" },
462 { 0x07, "X.25 multilink" },
463 { 0x08, "T.71 Extended LAPB" },
464 { 0x09, "HDLC ARM" },
465 { 0x0A, "HDLC NRM" },
466 { 0x0B, "HDLC ABM" },
467 { 0x0C, "ISO 8802/2 LLC" },
468 { 0x0D, "X.75 Single Link Procedure" },
469 { 0x0E, "Q.922" },
470 { 0x0F, "Core aspects of Q.922" },
471 { Q933_UIL2_USER_SPEC, "User-specified" },
472 { 0x11, "ISO 7776 DTE-DTE operation" },
473 { 0, NULL }
474 };
475
476 static const value_string q933_address_inclusion_vals[] = {
477 { 0x01, "Address included" },
478 { 0x02, "Encapsulation of logical control frame" },
479 { 0, NULL }
480 };
481
482 static const value_string q933_mode_vals[] = {
483 { 0x20, "Normal mode" },
484 { 0x40, "Extended mode" },
485 { 0, NULL }
486 };
487
488 #define Q933_UIL3_X25_PL 0x06
489 #define Q933_UIL3_ISO_8208 0x07 /* X.25-based */
490 #define Q933_UIL3_X223 0x08 /* X.25-based */
491 #define Q933_UIL3_TR_9577 0x0B
492 #define Q933_UIL3_USER_SPEC 0x10
493
494 static const value_string q933_uil3_vals[] = {
495 { Q933_UIL3_X25_PL, "X.25, packet layer" },
496 { Q933_UIL3_ISO_8208, "ISO/IEC 8208" },
497 { Q933_UIL3_X223, "X.223/ISO 8878" },
498 { 0x09, "ISO/IEC 8473" },
499 { 0x0A, "T.70" },
500 { Q933_UIL3_TR_9577, "ISO/IEC TR 9577" },
501 { Q933_UIL3_USER_SPEC, "User-specified" },
502 { 0, NULL }
503 };
504
505 static void
dissect_q933_protocol_discriminator(tvbuff_t * tvb,int offset,proto_tree * tree)506 dissect_q933_protocol_discriminator(tvbuff_t *tvb, int offset, proto_tree *tree)
507 {
508 unsigned int discriminator = tvb_get_guint8(tvb, offset);
509
510 if (discriminator == NLPID_Q_933) {
511 proto_tree_add_uint_format_value(tree, hf_q933_discriminator,
512 tvb, offset, 1, discriminator,
513 "Q.933");
514 } else if (discriminator == NLPID_Q_2931) {
515 proto_tree_add_uint_format_value(tree, hf_q933_discriminator,
516 tvb, offset, 1, discriminator,
517 "Q.2931");
518 } else if ((discriminator >= 16 && discriminator < 63)
519 || ((discriminator >= 80) && (discriminator < 254))) {
520 proto_tree_add_uint_format_value(tree, hf_q933_discriminator,
521 tvb, offset, 1, discriminator,
522 "Network layer or layer 3 protocol (0x%02X)",
523 discriminator);
524 } else if (discriminator >= 64 && discriminator <= 79) {
525 proto_tree_add_uint_format_value(tree, hf_q933_discriminator,
526 tvb, offset, 1, discriminator,
527 "National use (0x%02X)",
528 discriminator);
529 } else {
530 proto_tree_add_uint_format_value(tree, hf_q933_discriminator,
531 tvb, offset, 1, discriminator,
532 "Reserved (0x%02X)",
533 discriminator);
534 }
535 }
536
537 static void
dissect_q933_bearer_capability_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)538 dissect_q933_bearer_capability_ie(tvbuff_t *tvb, int offset, int len,
539 proto_tree *tree)
540 {
541 guint8 octet;
542 guint8 coding_standard;
543 guint8 uil2_protocol;
544 guint8 uil3_protocol;
545
546 if (len == 0)
547 return;
548 octet = tvb_get_guint8(tvb, offset);
549 coding_standard = octet & 0x60;
550 if (coding_standard != Q933_ITU_STANDARDIZED_CODING) {
551 /*
552 * We don't know how the bearer capability is encoded,
553 * so just dump it as data and be done with it.
554 */
555 proto_tree_add_item(tree, hf_q933_data, tvb, offset, len, ENC_NA);
556 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
557 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
558 return;
559 }
560 proto_tree_add_uint(tree, hf_q933_information_transfer_capability, tvb, offset, 1, octet);
561 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
562 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
563 offset += 1;
564 len -= 1;
565
566 /*
567 * XXX - only in Low-layer compatibility information element.
568 */
569 if (!(octet & Q933_IE_VL_EXTENSION)) {
570 if (len == 0)
571 return;
572 proto_tree_add_item(tree, hf_q933_out_band_negotiation, tvb, offset, 1, ENC_NA);
573 offset += 1;
574 len -= 1;
575 }
576
577 if (len == 0)
578 return;
579 octet = tvb_get_guint8(tvb, offset);
580 proto_tree_add_uint(tree, hf_q933_transfer_mode, tvb, offset, 1, octet);
581 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
582 offset += 1;
583 len -= 1;
584
585 if (len == 0)
586 return;
587 octet = tvb_get_guint8(tvb, offset);
588 if ((octet & 0x60) == 0x20) {
589 /*
590 * Layer 1 information.
591 */
592 proto_tree_add_uint(tree, hf_q933_uil1, tvb, offset, 1, octet);
593 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
594 offset += 1;
595 len -= 1;
596
597 if (octet & Q933_IE_VL_EXTENSION)
598 goto l1_done;
599 if (len == 0)
600 return;
601 octet = tvb_get_guint8(tvb, offset);
602 proto_tree_add_item(tree, hf_q933_layer_1, tvb, offset, 1, ENC_NA);
603 proto_tree_add_item(tree, hf_q933_user_rate, tvb, offset, 1, ENC_BIG_ENDIAN);
604 offset += 1;
605 len -= 1;
606
607 if (octet & Q933_IE_VL_EXTENSION)
608 goto l1_done;
609 if (len == 0)
610 return;
611 octet = tvb_get_guint8(tvb, offset);
612 proto_tree_add_item(tree, hf_q933_rate_adaption_header, tvb, offset, 1, ENC_NA);
613 proto_tree_add_item(tree, hf_q933_multiple_frame_establishment, tvb, offset, 1, ENC_NA);
614 proto_tree_add_item(tree, hf_q933_mode_of_operation, tvb, offset, 1, ENC_NA);
615 offset += 1;
616 len -= 1;
617
618 if (octet & Q933_IE_VL_EXTENSION)
619 goto l1_done;
620 if (len == 0)
621 return;
622 octet = tvb_get_guint8(tvb, offset);
623 proto_tree_add_item(tree, hf_q933_stop_bits, tvb, offset, 1, ENC_BIG_ENDIAN);
624 proto_tree_add_item(tree, hf_q933_data_bits, tvb, offset, 1, ENC_BIG_ENDIAN);
625 proto_tree_add_item(tree, hf_q933_parity, tvb, offset, 1, ENC_BIG_ENDIAN);
626 offset += 1;
627 len -= 1;
628
629 if (octet & Q933_IE_VL_EXTENSION)
630 goto l1_done;
631 if (len == 0)
632 return;
633 proto_tree_add_item(tree, hf_q933_duplex, tvb, offset, 1, ENC_NA);
634 proto_tree_add_item(tree, hf_q933_modem_type, tvb, offset, 1, ENC_BIG_ENDIAN);
635 offset += 1;
636 len -= 1;
637 }
638 l1_done:
639 ;
640
641 if (len == 0)
642 return;
643 octet = tvb_get_guint8(tvb, offset);
644 if ((octet & 0x60) == 0x40) {
645 /*
646 * Layer 2 information.
647 */
648 uil2_protocol = octet & 0x1F;
649 proto_tree_add_item(tree, hf_q933_user_information_layer_2_protocol, tvb, offset, 1, ENC_BIG_ENDIAN);
650 offset += 1;
651 len -= 1;
652
653 /*
654 * XXX - only in Low-layer compatibility information element.
655 */
656 if (octet & Q933_IE_VL_EXTENSION)
657 goto l2_done;
658 if (len == 0)
659 return;
660 if (uil2_protocol == Q933_UIL2_USER_SPEC) {
661 proto_tree_add_item(tree, hf_q933_user_specified_layer_2_protocol_information, tvb, offset, 1, ENC_BIG_ENDIAN);
662 } else {
663 proto_tree_add_item(tree, hf_q933_address_inclusion, tvb, offset, 1, ENC_BIG_ENDIAN);
664 }
665 offset += 1;
666 len -= 1;
667 }
668 l2_done:
669 ;
670
671 if (len == 0)
672 return;
673 octet = tvb_get_guint8(tvb, offset);
674 if ((octet & 0x60) == 0x60) {
675 /*
676 * Layer 3 information.
677 */
678 uil3_protocol = octet & 0x1F;
679 proto_tree_add_item(tree, hf_q933_user_information_layer_3_protocol, tvb, offset, 1, ENC_BIG_ENDIAN);
680 offset += 1;
681 len -= 1;
682
683
684 /*
685 * XXX - only in Low-layer compatibility information element.
686 */
687 if (octet & Q933_IE_VL_EXTENSION)
688 goto l3_done;
689 if (len == 0)
690 return;
691 octet = tvb_get_guint8(tvb, offset);
692 switch (uil3_protocol) {
693
694 case Q933_UIL3_X25_PL:
695 case Q933_UIL3_ISO_8208:
696 case Q933_UIL3_X223:
697 proto_tree_add_item(tree, hf_q933_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
698 offset += 1;
699 len -= 1;
700
701 if (octet & Q933_IE_VL_EXTENSION)
702 goto l3_done;
703 if (len == 0)
704 return;
705 octet = tvb_get_guint8(tvb, offset);
706 proto_tree_add_item(tree, hf_q933_default_packet_size_0F, tvb, offset, 1, ENC_BIG_ENDIAN);
707 offset += 1;
708 len -= 1;
709
710 if (octet & Q933_IE_VL_EXTENSION)
711 goto l3_done;
712 if (len == 0)
713 return;
714 proto_tree_add_item(tree, hf_q933_packet_window_size, tvb, offset, 1, ENC_BIG_ENDIAN);
715 /*offset += 1;*/
716 /*len -= 1;*/
717 break;
718
719 case Q933_UIL3_USER_SPEC:
720 proto_tree_add_uint_format_value(tree, hf_q933_default_packet_size, tvb, offset, 1,
721 1 << (octet & 0x0F), "%u octets", 1 << (octet & 0x0F));
722 /*offset += 1;*/
723 /*len -= 1;*/
724 break;
725
726 case Q933_UIL3_TR_9577:
727 if (octet & Q933_IE_VL_EXTENSION)
728 goto l3_done;
729 #if 0 /* XXX: len is always >0 at this point; is field always 2 bytes (if not Q933_IE_VL_EXTENSION) ? */
730 if (len == 0)
731 return;
732 #endif
733 proto_tree_add_item(tree, hf_q933_additional_layer_3_protocol_information, tvb, offset, 2, ENC_BIG_ENDIAN);
734 /*offset += 2;*/
735 /*len -= 2;*/
736 break;
737 }
738 }
739 l3_done:
740 ;
741 }
742
743 /*
744 * Dissect a Cause information element.
745 */
746
747
748 static const value_string q933_cause_location_vals[] = {
749 { 0x00, "User (U)" },
750 { 0x01, "Private network serving the local user (LPN)" },
751 { 0x02, "Public network serving the local user (LN)" },
752 { 0x03, "Transit network (TN)" },
753 { 0x04, "Public network serving the remote user (RLN)" },
754 { 0x05, "Private network serving the remote user (RPN)" },
755 { 0x07, "International network (INTL)" },
756 { 0x0A, "Network beyond interworking point (BI)" },
757 { 0, NULL }
758 };
759
760 static const value_string q933_cause_recommendation_vals[] = {
761 { 0x00, "Q.933" },
762 { 0x03, "X.21" },
763 { 0x04, "X.25" },
764 { 0x05, "Q.1031/Q.1051" },
765 { 0, NULL }
766 };
767
768 /*
769 * Cause codes for Cause.
770 */
771 #define Q933_CAUSE_UNALLOC_NUMBER 0x01
772 #define Q933_CAUSE_NO_ROUTE_TO_DEST 0x03
773 #define Q933_CAUSE_CALL_REJECTED 0x15
774 #define Q933_CAUSE_NUMBER_CHANGED 0x16
775 #define Q933_CAUSE_ACCESS_INFO_DISC 0x2B
776 #define Q933_CAUSE_QOS_UNAVAILABLE 0x31
777 #define Q933_CAUSE_CHAN_NONEXISTENT 0x52
778 #define Q933_CAUSE_INCOMPATIBLE_DEST 0x58
779 #define Q933_CAUSE_MAND_IE_MISSING 0x60
780 #define Q933_CAUSE_MT_NONEX_OR_UNIMPL 0x61
781 #define Q933_CAUSE_IE_NONEX_OR_UNIMPL 0x63
782 #define Q933_CAUSE_INVALID_IE_CONTENTS 0x64
783 #define Q933_CAUSE_MSG_INCOMPAT_W_CS 0x65
784 #define Q933_CAUSE_REC_TIMER_EXP 0x66
785
786 static const value_string q933_cause_code_vals[] = {
787 { 0x00, "Valid cause code not yet received" },
788 { Q933_CAUSE_UNALLOC_NUMBER, "Unallocated (unassigned) number" },
789 { 0x02, "No route to specified transit network" },
790 { Q933_CAUSE_NO_ROUTE_TO_DEST, "No route to destination" },
791 { 0x04, "Send special information tone" },
792 { 0x05, "Misdialled trunk prefix" },
793 { 0x06, "Channel unacceptable" },
794 { 0x07, "Call awarded and being delivered in an established channel" },
795 { 0x08, "Prefix 0 dialed but not allowed" },
796 /* Q.850 - "Preemption" */
797 { 0x09, "Prefix 1 dialed but not allowed" },
798 /* Q.850 - "Preemption - circuit reserved for reuse" */
799 { 0x0A, "Prefix 1 dialed but not required" },
800 { 0x0B, "More digits received than allowed, call is proceeding" },
801 { 0x0E, "QoR: ported number" },
802 { 0x10, "Normal call clearing" },
803 { 0x11, "User busy" },
804 { 0x12, "No user responding" },
805 { 0x13, "No answer from user (user alerted)" },
806 { 0x14, "Subscriber absent" },
807 { Q933_CAUSE_CALL_REJECTED, "Call rejected" },
808 { Q933_CAUSE_NUMBER_CHANGED, "Number changed" },
809 { 0x17, "Reverse charging rejected" },
810 /* Q.850 - "Redirection to new destination" */
811 { 0x18, "Call suspended" },
812 /* Q.850 Amendment 1 - "Call rejected due to feature at the destination" */
813 { 0x19, "Call resumed" },
814 /* Q.850 - "Exchange routing error */
815 { 0x1A, "Non-selected user clearing" },
816 { 0x1B, "Destination out of order" },
817 { 0x1C, "Invalid number format (incomplete number)" },
818 { 0x1D, "Facility rejected" },
819 { 0x1E, "Response to STATUS ENQUIRY" },
820 { 0x1F, "Normal unspecified" },
821 { 0x21, "Circuit out of order" },
822 { 0x22, "No circuit/channel available" },
823 { 0x23, "Destination unattainable" },
824 { 0x25, "Degraded service" },
825 { 0x26, "Network out of order" },
826 { 0x27, "Transit delay range cannot be achieved" },
827 /* Q.850 - "Permanent frame mode connection out of service" */
828 { 0x28, "Throughput range cannot be achieved" },
829 /* Q.850 - "Permanent frame mode connection operational" */
830 { 0x29, "Temporary failure" },
831 { 0x2A, "Switching equipment congestion" },
832 { Q933_CAUSE_ACCESS_INFO_DISC, "Access information discarded" },
833 { 0x2C, "Requested circuit/channel not available" },
834 { 0x2D, "Pre-empted" },
835 { 0x2E, "Precedence call blocked" },
836 { 0x2F, "Resources unavailable, unspecified" },
837 { Q933_CAUSE_QOS_UNAVAILABLE, "Quality of service unavailable" },
838 { 0x32, "Requested facility not subscribed" },
839 { 0x33, "Reverse charging not allowed" },
840 { 0x34, "Outgoing calls barred" },
841 { 0x35, "Outgoing calls barred within CUG" },
842 { 0x36, "Incoming calls barred" },
843 { 0x37, "Incoming calls barred within CUG" },
844 { 0x38, "Call waiting not subscribed" },
845 { 0x39, "Bearer capability not authorized" },
846 { 0x3A, "Bearer capability not presently available" },
847 { 0x3E, "Inconsistency in designated outgoing access information and subscriber class" },
848 { 0x3F, "Service or option not available, unspecified" },
849 { 0x41, "Bearer capability not implemented" },
850 { 0x42, "Channel type not implemented" },
851 { 0x43, "Transit network selection not implemented" },
852 { 0x44, "Message not implemented" },
853 { 0x45, "Requested facility not implemented" },
854 { 0x46, "Only restricted digital information bearer capability is available" },
855 { 0x4F, "Service or option not implemented, unspecified" },
856 { 0x51, "Invalid call reference value" },
857 { Q933_CAUSE_CHAN_NONEXISTENT, "Identified channel does not exist" },
858 { 0x53, "Call identity does not exist for suspended call" },
859 { 0x54, "Call identity in use" },
860 { 0x55, "No call suspended" },
861 { 0x56, "Call having the requested call identity has been cleared" },
862 { 0x57, "Called user not member of CUG" },
863 { Q933_CAUSE_INCOMPATIBLE_DEST, "Incompatible destination" },
864 { 0x59, "Non-existent abbreviated address entry" },
865 { 0x5A, "Destination address missing, and direct call not subscribed" },
866 /* Q.850 - "Non-existent CUG" */
867 { 0x5B, "Invalid transit network selection (national use)" },
868 { 0x5C, "Invalid facility parameter" },
869 { 0x5D, "Mandatory information element is missing" },
870 { 0x5F, "Invalid message, unspecified" },
871 { Q933_CAUSE_MAND_IE_MISSING, "Mandatory information element is missing" },
872 { Q933_CAUSE_MT_NONEX_OR_UNIMPL,"Message type non-existent or not implemented" },
873 { 0x62, "Message not compatible with call state or message type non-existent or not implemented" },
874 { Q933_CAUSE_IE_NONEX_OR_UNIMPL,"Information element non-existent or not implemented" },
875 { Q933_CAUSE_INVALID_IE_CONTENTS,"Invalid information element contents" },
876 { Q933_CAUSE_MSG_INCOMPAT_W_CS, "Message not compatible with call state" },
877 { Q933_CAUSE_REC_TIMER_EXP, "Recovery on timer expiry" },
878 { 0x67, "Parameter non-existent or not implemented - passed on" },
879 { 0x6E, "Message with unrecognized parameter discarded" },
880 { 0x6F, "Protocol error, unspecified" },
881 { 0x7F, "Internetworking, unspecified" },
882 { 0, NULL }
883 };
884
885 static const value_string q933_cause_condition_vals[] = {
886 { 0x00, "Unknown" },
887 { 0x01, "Permanent" },
888 { 0x02, "Transient" },
889 { 0x00, NULL }
890 };
891
892 #define Q933_REJ_USER_SPECIFIC 0x00
893 #define Q933_REJ_IE_MISSING 0x04
894 #define Q933_REJ_IE_INSUFFICIENT 0x08
895
896 static const value_string q933_rejection_reason_vals[] = {
897 { 0x00, "User specific" },
898 { 0x04, "Information element missing" },
899 { 0x08, "Information element contents are not sufficient" },
900 { 0x00, NULL }
901 };
902
903
904 static void
dissect_q933_cause_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree,int hf_cause_value)905 dissect_q933_cause_ie(tvbuff_t *tvb, int offset, int len,
906 proto_tree *tree, int hf_cause_value)
907 {
908 guint8 octet;
909 guint8 cause_value;
910 guint8 coding_standard;
911 guint8 rejection_reason;
912
913 if (len == 0)
914 return;
915 octet = tvb_get_guint8(tvb, offset);
916 coding_standard = octet & 0x60;
917 if (coding_standard != Q933_ITU_STANDARDIZED_CODING) {
918 /*
919 * We don't know how the cause is encoded,
920 * so just dump it as data and be done with it.
921 */
922 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
923 proto_tree_add_item(tree, hf_q933_data, tvb, offset, len, ENC_NA);
924 return;
925 }
926 proto_tree_add_uint(tree, hf_q933_cause_location, tvb, offset, 1, octet);
927 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
928 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
929 offset += 1;
930 len -= 1;
931
932 if (!(octet & Q933_IE_VL_EXTENSION)) {
933 if (len == 0)
934 return;
935 octet = tvb_get_guint8(tvb, offset);
936 proto_tree_add_item(tree, hf_q933_recommendation, tvb, offset, 1, ENC_BIG_ENDIAN);
937 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
938 offset += 1;
939 len -= 1;
940 }
941
942 if (len == 0)
943 return;
944 octet = tvb_get_guint8(tvb, offset);
945 cause_value = octet & 0x7F;
946 proto_tree_add_uint(tree, hf_cause_value, tvb, offset, 1, cause_value);
947 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
948 offset += 1;
949 len -= 1;
950
951 if (len == 0)
952 return;
953 switch (cause_value) {
954
955 case Q933_CAUSE_UNALLOC_NUMBER:
956 case Q933_CAUSE_NO_ROUTE_TO_DEST:
957 case Q933_CAUSE_QOS_UNAVAILABLE:
958 proto_tree_add_item(tree, hf_q933_network_service, tvb, offset, 1, ENC_NA);
959 proto_tree_add_item(tree, hf_q933_condition_normal, tvb, offset, 1, ENC_NA);
960 proto_tree_add_item(tree, hf_q933_condition, tvb, offset, 1, ENC_BIG_ENDIAN);
961 break;
962
963 case Q933_CAUSE_CALL_REJECTED:
964 rejection_reason = octet & 0x7C;
965 proto_tree_add_item(tree, hf_q933_rejection_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
966 proto_tree_add_item(tree, hf_q933_condition, tvb, offset, 1, ENC_BIG_ENDIAN);
967 offset += 1;
968 len -= 1;
969
970 if (len == 0)
971 return;
972 switch (rejection_reason) {
973
974 case Q933_REJ_USER_SPECIFIC:
975 proto_tree_add_item(tree, hf_q933_user_specific_diagnostic, tvb, offset, len, ENC_NA);
976 break;
977
978 case Q933_REJ_IE_MISSING:
979 proto_tree_add_item(tree, hf_q933_missing_information_element, tvb, offset, 1, ENC_BIG_ENDIAN);
980 break;
981
982 case Q933_REJ_IE_INSUFFICIENT:
983 proto_tree_add_item(tree, hf_q933_insufficient_information_element, tvb, offset, 1, ENC_BIG_ENDIAN);
984 break;
985
986 default:
987 proto_tree_add_item(tree, hf_q933_diagnostic, tvb, offset, len, ENC_NA);
988 break;
989 }
990 break;
991
992 case Q933_CAUSE_ACCESS_INFO_DISC:
993 case Q933_CAUSE_INCOMPATIBLE_DEST:
994 case Q933_CAUSE_MAND_IE_MISSING:
995 case Q933_CAUSE_IE_NONEX_OR_UNIMPL:
996 case Q933_CAUSE_INVALID_IE_CONTENTS:
997 do {
998 proto_tree_add_item(tree, hf_q933_information_element, tvb, offset, 1, ENC_BIG_ENDIAN);
999 offset += 1;
1000 len -= 1;
1001 } while (len != 0);
1002 break;
1003
1004 case Q933_CAUSE_MT_NONEX_OR_UNIMPL:
1005 case Q933_CAUSE_MSG_INCOMPAT_W_CS:
1006 proto_tree_add_item(tree, hf_q933_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
1007 break;
1008
1009 case Q933_CAUSE_REC_TIMER_EXP:
1010 if (len < 3)
1011 return;
1012 proto_tree_add_item(tree, hf_q933_timer, tvb, offset, 3, ENC_ASCII|ENC_NA);
1013 break;
1014
1015 default:
1016 proto_tree_add_item(tree, hf_q933_diagnostics, tvb, offset, len, ENC_NA);
1017 }
1018 }
1019
1020 /*
1021 * Dissect a Call state information element.
1022 */
1023 static const value_string q933_call_state_vals[] = {
1024 { 0x00, "Null" },
1025 { 0x01, "Call initiated" },
1026 { 0x02, "Overlap sending" },
1027 { 0x03, "Outgoing call proceeding" },
1028 { 0x04, "Call delivered" },
1029 { 0x06, "Call present" },
1030 { 0x07, "Call received" },
1031 { 0x08, "Connect request" },
1032 { 0x09, "Incoming call proceeding" },
1033 { 0x0A, "Active" },
1034 { 0x0B, "Disconnect request" },
1035 { 0x0C, "Disconnect indication" },
1036 { 0x0F, "Suspend request" },
1037 { 0x12, "Resume request" },
1038 { 0x13, "Release request" },
1039 { 0x16, "Call abort"},
1040 { 0x19, "Overlap receiving" },
1041 { 0x3D, "Restart request" },
1042 { 0x3E, "Restart" },
1043 { 0, NULL }
1044 };
1045
1046 static void
dissect_q933_call_state_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1047 dissect_q933_call_state_ie(tvbuff_t *tvb, int offset, int len,
1048 proto_tree *tree)
1049 {
1050 guint8 octet;
1051 guint8 coding_standard;
1052
1053 if (len == 0)
1054 return;
1055 octet = tvb_get_guint8(tvb, offset);
1056 coding_standard = octet & 0x60;
1057 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
1058 if (coding_standard != Q933_ITU_STANDARDIZED_CODING) {
1059 /*
1060 * We don't know how the call state is encoded,
1061 * so just dump it as data and be done with it.
1062 */
1063 proto_tree_add_item(tree, hf_q933_data, tvb, offset, len, ENC_NA);
1064 return;
1065 }
1066 proto_tree_add_item(tree, hf_q933_call_state, tvb, offset, 1, ENC_BIG_ENDIAN);
1067 }
1068
1069 /*
1070 * Dissect a Report Type information element.
1071 */
1072 #define Q933_IE_REPORT_TYPE_FULL_STATUS 0x00
1073 #define Q933_IE_REPORT_TYPE_LINK_VERIFY 0x01
1074 #define Q933_IE_REPORT_TYPE_ASYNC_PVC_STATUS 0x02
1075
1076 static const value_string q933_report_type_vals[] = {
1077 { Q933_IE_REPORT_TYPE_FULL_STATUS, "Full Status" },
1078 { Q933_IE_REPORT_TYPE_LINK_VERIFY, "Link verify" },
1079 { Q933_IE_REPORT_TYPE_ASYNC_PVC_STATUS, "Async PVC Status" },
1080 { 0, NULL }
1081 };
1082
1083 static void
dissect_q933_report_type_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1084 dissect_q933_report_type_ie(tvbuff_t *tvb, int offset, int len,
1085 proto_tree *tree)
1086 {
1087 guint8 report_type;
1088
1089 if (len == 0)
1090 return;
1091
1092 report_type = tvb_get_guint8(tvb, offset);
1093 proto_tree_add_uint(tree, hf_q933_report_type, tvb, offset, 1, report_type);
1094 }
1095
1096 /*
1097 * Dissect a Link Integrity Verification information element.
1098 */
1099 static void
dissect_q933_link_integrity_verf_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1100 dissect_q933_link_integrity_verf_ie(tvbuff_t *tvb, int offset, int len,
1101 proto_tree *tree)
1102 {
1103 guint8 txseq,rxseq;
1104
1105 if (len < 2)
1106 return;
1107
1108 txseq = tvb_get_guint8(tvb, offset);
1109 rxseq = tvb_get_guint8(tvb, offset+1);
1110
1111 proto_tree_add_uint(tree, hf_q933_link_verf_txseq, tvb, offset, 1, txseq);
1112 proto_tree_add_uint(tree, hf_q933_link_verf_rxseq, tvb, offset+1, 1, rxseq);
1113
1114 }
1115
1116 /*
1117 * Dissect a PVC status information element.
1118 */
1119 static const value_string q933_pvc_status_vals[] = {
1120 {0x00, "Inactive"},
1121 {0x01, "Active"},
1122 {0x02, "Deleted"},
1123 {0x04, "New"},
1124 {0x05, "New, Active"},
1125 {0, NULL}
1126 };
1127
1128 static void
dissect_q933_pvc_status_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1129 dissect_q933_pvc_status_ie(tvbuff_t *tvb, int offset, int len,
1130 proto_tree *tree)
1131 {
1132 guint32 dlci;
1133 guint8 dlci_len=2;
1134
1135 if (len < 3)
1136 return;
1137
1138 dlci = ((tvb_get_guint8(tvb, offset) & 0x3F) << 4) |
1139 ((tvb_get_guint8(tvb, offset+1) & 0x78) >> 3);
1140
1141 /* first determine the DLCI field length */
1142 if (len == 4) {
1143 dlci = (dlci << 6) | ((tvb_get_guint8(tvb, offset+2) & 0x7E) >> 1);
1144 dlci_len++;
1145 } else if (len == 5) {
1146 dlci = (dlci << 13) | (tvb_get_guint8(tvb, offset+3) & 0x7F) |
1147 ((tvb_get_guint8(tvb, offset+4) & 0x7E) >> 1);
1148 dlci_len+=2;
1149 }
1150
1151 proto_tree_add_uint(tree, hf_q933_dlci, tvb, offset, dlci_len, dlci);
1152 proto_tree_add_item(tree, hf_q933_status, tvb, offset+dlci_len, 1, ENC_BIG_ENDIAN);
1153 }
1154
1155 /*
1156 * Dissect a Channel identification information element.
1157 */
1158 #define Q933_INTERFACE_IDENTIFIED 0x40
1159 #define Q933_NOT_BASIC_CHANNEL 0x20
1160
1161 static const value_string q933_basic_channel_selection_vals[] = {
1162 { 0x00, "No channel" },
1163 { 0x01, "B1 channel" },
1164 { 0x02, "B2 channel" },
1165 { 0x03, "Any channel" },
1166 { 0, NULL }
1167 };
1168
1169 static const value_string q933_not_basic_channel_selection_vals[] = {
1170 { 0x00, "No channel" },
1171 { 0x01, "Channel indicated in following octets" },
1172 { 0x03, "Any channel" },
1173 { 0, NULL }
1174 };
1175
1176 #define Q933_IS_SLOT_MAP 0x10
1177
1178 static const value_string q933_element_type_vals[] = {
1179 { 0x03, "B-channel units" },
1180 { 0x06, "H0-channel units" },
1181 { 0x08, "H11-channel units" },
1182 { 0x09, "H12-channel units" },
1183 { 0, NULL }
1184 };
1185
1186 static const true_false_string tfs_explicitly_implicitly_identified = { "Explicitly identified", "Implicitly identified" };
1187 static const true_false_string tfs_not_basic_basic = { "Not basic", "Basic" };
1188 static const true_false_string tfs_required_preferred = { "Required", "Preferred" };
1189 static const true_false_string tfs_dchannel_not_dchannel = { "D-channel", "Not D-channel" };
1190 static const true_false_string tfs_slot_map_number = { "slot map", "number" };
1191
1192
1193 static void
dissect_q933_channel_identification_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1194 dissect_q933_channel_identification_ie(tvbuff_t *tvb, int offset, int len,
1195 proto_tree *tree)
1196 {
1197 guint8 octet;
1198 int identifier_offset;
1199 int identifier_len;
1200 guint8 coding_standard;
1201
1202 if (len == 0)
1203 return;
1204 octet = tvb_get_guint8(tvb, offset);
1205 proto_tree_add_item(tree, hf_q933_interface_identified, tvb, offset, 1, ENC_NA);
1206 proto_tree_add_item(tree, hf_q933_interface_basic, tvb, offset, 1, ENC_NA);
1207 proto_tree_add_item(tree, hf_q933_indicated_channel_required, tvb, offset, 1, ENC_NA);
1208 proto_tree_add_item(tree, hf_q933_indicated_channel_d_channel, tvb, offset, 1, ENC_NA);
1209 if (octet & Q933_NOT_BASIC_CHANNEL) {
1210 proto_tree_add_item(tree, hf_q933_not_channel_selection, tvb, offset, 1, ENC_BIG_ENDIAN);
1211 } else {
1212 proto_tree_add_item(tree, hf_q933_channel_selection, tvb, offset, 1, ENC_BIG_ENDIAN);
1213 }
1214 offset += 1;
1215 len -= 1;
1216
1217 if (octet & Q933_INTERFACE_IDENTIFIED) {
1218 identifier_offset = offset;
1219 identifier_len = 0;
1220 do {
1221 if (len == 0)
1222 break;
1223 octet = tvb_get_guint8(tvb, offset);
1224 offset += 1;
1225 len -= 1;
1226 identifier_len++;
1227 } while (!(octet & Q933_IE_VL_EXTENSION));
1228
1229 /*
1230 * XXX - do we want to strip off the 8th bit on the
1231 * last octet of the interface identifier?
1232 */
1233 if (identifier_len != 0) {
1234 proto_tree_add_item(tree, hf_q933_interface_identifier, tvb, identifier_offset, identifier_len, ENC_NA);
1235 }
1236 }
1237
1238 if (octet & Q933_NOT_BASIC_CHANNEL) {
1239 if (len == 0)
1240 return;
1241 octet = tvb_get_guint8(tvb, offset);
1242 coding_standard = octet & 0x60;
1243 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
1244 if (coding_standard != Q933_ITU_STANDARDIZED_CODING) {
1245 /*
1246 * We don't know how the channel identifier is
1247 * encoded, so just dump it as data and be done
1248 * with it.
1249 */
1250 proto_tree_add_item(tree, hf_q933_data, tvb, offset, len, ENC_NA);
1251 return;
1252 }
1253 proto_tree_add_item(tree, hf_q933_channel_indicated_by, tvb, offset, 1, ENC_NA);
1254 proto_tree_add_item(tree, (octet & Q933_IS_SLOT_MAP) ? hf_q933_map_element_type : hf_q933_channel_type, tvb, offset, 1, ENC_NA);
1255
1256 /*
1257 * XXX - dump the channel number or slot map.
1258 */
1259 }
1260 }
1261
1262 /*
1263 * Dissect a Progress indicator information element.
1264 */
1265 static const value_string q933_progress_description_vals[] = {
1266 { 0x01, "Call is not end-to-end ISDN - progress information available in-band" },
1267 { 0x02, "Destination address is non-ISDN" },
1268 { 0x03, "Origination address is non-ISDN" },
1269 { 0x04, "Call has returned to the ISDN" },
1270 { 0x05, "Interworking has occurred and has resulted in a telecommunications service change" },
1271 { 0x08, "In-band information or an appropriate pattern is now available" },
1272 { 0, NULL }
1273 };
1274
1275 static void
dissect_q933_progress_indicator_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1276 dissect_q933_progress_indicator_ie(tvbuff_t *tvb, int offset, int len,
1277 proto_tree *tree)
1278 {
1279 guint8 octet;
1280 guint8 coding_standard;
1281
1282 if (len == 0)
1283 return;
1284 octet = tvb_get_guint8(tvb, offset);
1285 coding_standard = octet & 0x60;
1286 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
1287 if (coding_standard != Q933_ITU_STANDARDIZED_CODING) {
1288 /*
1289 * We don't know how the progress indicator is encoded,
1290 * so just dump it as data and be done with it.
1291 */
1292 proto_tree_add_item(tree, hf_q933_data, tvb, offset, len, ENC_NA);
1293 return;
1294 }
1295 proto_tree_add_item(tree, hf_q933_location, tvb, offset, 1, ENC_BIG_ENDIAN);
1296 offset += 1;
1297 len -= 1;
1298
1299 if (len == 0)
1300 return;
1301 proto_tree_add_item(tree, hf_q933_progress_description, tvb, offset, 1, ENC_BIG_ENDIAN);
1302 }
1303
1304 /*
1305 * Dissect a Network-specific facilities or Transit network selection
1306 * information element.
1307 */
1308 static const value_string q933_netid_type_vals[] = {
1309 { 0x00, "User specified" },
1310 { 0x20, "National network identification" },
1311 { 0x30, "International network identification" },
1312 { 0, NULL }
1313 };
1314
1315 static const value_string q933_netid_plan_vals[] = {
1316 { 0x00, "Unknown" },
1317 { 0x01, "Carrier Identification Code" },
1318 { 0x03, "X.121 data network identification code" },
1319 { 0, NULL }
1320 };
1321
1322 static void
dissect_q933_ns_facilities_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1323 dissect_q933_ns_facilities_ie(tvbuff_t *tvb, int offset, int len,
1324 proto_tree *tree)
1325 {
1326 guint8 octet;
1327 int netid_len;
1328
1329 if (len == 0)
1330 return;
1331 octet = tvb_get_guint8(tvb, offset);
1332 netid_len = octet & 0x7F;
1333 proto_tree_add_item(tree, hf_q933_network_identification_length, tvb, offset, 1, ENC_BIG_ENDIAN);
1334 offset += 1;
1335 len -= 1;
1336 if (netid_len != 0) {
1337 if (len == 0)
1338 return;
1339 proto_tree_add_item(tree, hf_q933_type_of_network_identification, tvb, offset, 1, ENC_BIG_ENDIAN);
1340 proto_tree_add_item(tree, hf_q933_network_identification_plan, tvb, offset, 1, ENC_BIG_ENDIAN);
1341 offset += 1;
1342 len -= 1;
1343 netid_len--;
1344
1345 if (len == 0)
1346 return;
1347 if (netid_len > len)
1348 netid_len = len;
1349 if (netid_len != 0) {
1350 proto_tree_add_item(tree, hf_q933_network_identification, tvb, offset, netid_len, ENC_NA|ENC_ASCII);
1351 offset += netid_len;
1352 len -= netid_len;
1353 }
1354 }
1355
1356 /*
1357 * Whatever is left is the network-specific facility
1358 * specification.
1359 */
1360 if (len == 0)
1361 return;
1362 proto_tree_add_item(tree, hf_q933_network_specific_facility_specification, tvb, offset, len, ENC_NA);
1363 }
1364
1365 static int
dissect_q933_guint16_value(tvbuff_t * tvb,packet_info * pinfo,int offset,int len,proto_tree * tree,int hf)1366 dissect_q933_guint16_value(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
1367 proto_tree *tree, int hf)
1368 {
1369 guint8 octet;
1370 guint16 value;
1371 int value_len;
1372
1373 value_len = 0;
1374
1375 octet = tvb_get_guint8(tvb, offset);
1376 if (octet & Q933_IE_VL_EXTENSION) {
1377 /*
1378 * Only one octet long - error.
1379 */
1380 goto bad_length;
1381 }
1382 value = (octet & 0x3) << 14;
1383 offset += 1;
1384 len -= 1;
1385 value_len++;
1386
1387 if (len == 0) {
1388 /*
1389 * We've reached the end of the information element - error.
1390 */
1391 goto past_end;
1392 }
1393 octet = tvb_get_guint8(tvb, offset);
1394 if (octet & Q933_IE_VL_EXTENSION) {
1395 /*
1396 * Only two octets long - error.
1397 */
1398 goto bad_length;
1399 }
1400 value |= (octet & 0x7F) << 7;
1401 offset += 1;
1402 len -= 1;
1403 value_len++;
1404
1405 if (len == 0) {
1406 /*
1407 * We've reached the end of the information element - error.
1408 */
1409 goto past_end;
1410 }
1411 octet = tvb_get_guint8(tvb, offset);
1412 if (!(octet & Q933_IE_VL_EXTENSION)) {
1413 /*
1414 * More than three octets long - error.
1415 */
1416 goto bad_length;
1417 }
1418 value |= (octet & 0x7F);
1419 offset += 1;
1420 /*len -= 1;*/
1421 value_len++;
1422
1423 proto_tree_add_uint(tree, hf, tvb, offset, value_len, value);
1424 return value_len;
1425
1426 past_end:
1427 proto_tree_add_expert_format(tree, pinfo, &ei_q933_invalid_length, tvb, offset, len,
1428 "%s goes past end of information element", proto_registrar_get_name(hf));
1429 return -1;
1430
1431 bad_length:
1432 proto_tree_add_expert_format(tree, pinfo, &ei_q933_invalid_length, tvb, offset, len,
1433 "%s isn't 3 octets long", proto_registrar_get_name(hf));
1434 return -1;
1435 }
1436
1437 /*
1438 * Dissect an End-to-end transit delay information element.
1439 */
1440 static void
dissect_q933_e2e_transit_delay_ie(tvbuff_t * tvb,packet_info * pinfo,int offset,int len,proto_tree * tree)1441 dissect_q933_e2e_transit_delay_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
1442 proto_tree *tree)
1443 {
1444 int value_len;
1445
1446 if (len == 0)
1447 return;
1448 value_len = dissect_q933_guint16_value(tvb, pinfo, offset, len, tree,
1449 hf_q933_cumulative_transit_delay);
1450 if (value_len < 0)
1451 return; /* error */
1452 offset += value_len;
1453 len -= value_len;
1454
1455 if (len == 0)
1456 return;
1457 value_len = dissect_q933_guint16_value(tvb, pinfo, offset, len, tree,
1458 hf_q933_requested_end_to_end_transit_delay);
1459 if (value_len < 0)
1460 return; /* error */
1461 offset += value_len;
1462 len -= value_len;
1463
1464 if (len == 0)
1465 return;
1466 /*value_len = */dissect_q933_guint16_value(tvb, pinfo, offset, len, tree,
1467 hf_q933_max_end_to_end_transit_delay);
1468 }
1469
1470 /*
1471 * Dissect a Transit delay selection and indication information element.
1472 */
1473 static void
dissect_q933_td_selection_and_int_ie(tvbuff_t * tvb,packet_info * pinfo,int offset,int len,proto_tree * tree)1474 dissect_q933_td_selection_and_int_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
1475 proto_tree *tree)
1476 {
1477 if (len == 0)
1478 return;
1479 dissect_q933_guint16_value(tvb, pinfo, offset, len, tree, hf_q933_transit_delay);
1480 }
1481
1482 static const true_false_string tfs_link_by_link_end_to_end = { "Link-by-link", "End-to-end" };
1483 static const true_false_string tfs_no_request_request_indicated = { "No request/request denied", "Request indicated/request accepted" };
1484
1485
1486 static void
dissect_q933_pl_binary_parameters_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1487 dissect_q933_pl_binary_parameters_ie(tvbuff_t *tvb, int offset, int len,
1488 proto_tree *tree)
1489 {
1490 if (len == 0)
1491 return;
1492
1493 proto_tree_add_item(tree, hf_q933_request, tvb, offset, 1, ENC_NA);
1494 proto_tree_add_item(tree, hf_q933_confirmation, tvb, offset, 1, ENC_NA);
1495 }
1496
1497 /*
1498 * Dissect a Reverse charging indication information element.
1499 */
1500 static const value_string q933_reverse_charging_indication_vals[] = {
1501 { 0x01, "Reverse charging requested" },
1502 { 0, NULL }
1503 };
1504
1505 static void
dissect_q933_reverse_charge_ind_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1506 dissect_q933_reverse_charge_ind_ie(tvbuff_t *tvb, int offset, int len,
1507 proto_tree *tree)
1508 {
1509 if (len == 0)
1510 return;
1511 proto_tree_add_item(tree, hf_q933_reverse_charging_indication, tvb, offset, 1, ENC_BIG_ENDIAN);
1512 }
1513
1514 /*
1515 * Dissect a (phone) number information element.
1516 */
1517 static const value_string q933_number_type_vals[] = {
1518 { 0x0, "Unknown" },
1519 { 0x1, "International number" },
1520 { 0x2, "National number" },
1521 { 0x3, "Network specific number" },
1522 { 0x4, "Subscriber number" },
1523 { 0x6, "Abbreviated number" },
1524 { 0, NULL }
1525 };
1526
1527 static const value_string q933_numbering_plan_vals[] = {
1528 { 0x00, "Unknown" },
1529 { 0x01, "E.164 ISDN/telephony numbering" },
1530 { 0x03, "X.121 data numbering" },
1531 { 0x04, "F.69 Telex numbering" },
1532 { 0x08, "National standard numbering" },
1533 { 0x09, "Private numbering" },
1534 { 0, NULL }
1535 };
1536
1537 static const value_string q933_presentation_indicator_vals[] = {
1538 { 0x00, "Presentation allowed" },
1539 { 0x01, "Presentation restricted" },
1540 { 0x02, "Number not available due to interworking" },
1541 { 0, NULL }
1542 };
1543
1544 static const value_string q933_screening_indicator_vals[] = {
1545 { 0x00, "User-provided, not screened" },
1546 { 0x01, "User-provided, verified and passed" },
1547 { 0x02, "User-provided, verified and failed" },
1548 { 0x03, "Network-provided" },
1549 { 0, NULL }
1550 };
1551
1552 static const value_string q933_redirection_reason_vals[] = {
1553 { 0x00, "Unknown" },
1554 { 0x01, "Call forwarding busy or called DTE busy" },
1555 { 0x02, "Call forwarding no reply" },
1556 { 0x04, "Call deflection" },
1557 { 0x09, "Called DTE out of order" },
1558 { 0x0A, "Call forwarding by the called DTE" },
1559 { 0x0F, "Call forwarding unconditional or systematic call redirection" },
1560 { 0, NULL }
1561 };
1562
1563 static void
dissect_q933_number_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree,int hfindex)1564 dissect_q933_number_ie(tvbuff_t *tvb, int offset, int len,
1565 proto_tree *tree, int hfindex)
1566 {
1567 guint8 octet;
1568
1569 if (len == 0)
1570 return;
1571 octet = tvb_get_guint8(tvb, offset);
1572 proto_tree_add_uint(tree, hf_q933_numbering_plan, tvb, offset, 1, octet);
1573 proto_tree_add_uint(tree, hf_q933_number_type, tvb, offset, 1, octet);
1574 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
1575
1576 offset += 1;
1577 len -= 1;
1578
1579 if (!(octet & Q933_IE_VL_EXTENSION)) {
1580 if (len == 0)
1581 return;
1582 octet = tvb_get_guint8(tvb, offset);
1583 proto_tree_add_uint(tree, hf_q933_screening_ind, tvb, offset, 1, octet);
1584 proto_tree_add_uint(tree, hf_q933_presentation_ind, tvb, offset, 1, octet);
1585 proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
1586 offset += 1;
1587 len -= 1;
1588 }
1589
1590 /*
1591 * XXX - only in a Redirecting number information element.
1592 */
1593 if (!(octet & Q933_IE_VL_EXTENSION)) {
1594 if (len == 0)
1595 return;
1596 proto_tree_add_item(tree, hf_q933_reason_for_redirection, tvb, offset, 1, ENC_BIG_ENDIAN);
1597 offset += 1;
1598 len -= 1;
1599 }
1600
1601 if (len == 0)
1602 return;
1603 proto_tree_add_item(tree, hfindex, tvb, offset, len, ENC_ASCII|ENC_NA);
1604 }
1605
1606 /*
1607 * Dissect a party subaddress information element.
1608 */
1609 static const value_string q933_subaddress_type_vals[] = {
1610 { 0x00, "X.213/ISO 8348 Add.2 NSAP" },
1611 { 0x20, "User-specified" },
1612 { 0, NULL }
1613 };
1614
1615 static const value_string q933_odd_even_indicator_vals[] = {
1616 { 0x00, "Even number of address signals" },
1617 { 0x10, "Odd number of address signals" },
1618 { 0, NULL }
1619 };
1620
1621 static void
dissect_q933_party_subaddr_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1622 dissect_q933_party_subaddr_ie(tvbuff_t *tvb, int offset, int len,
1623 proto_tree *tree)
1624 {
1625 if (len == 0)
1626 return;
1627
1628 proto_tree_add_item(tree, hf_q933_type_of_subaddress, tvb, offset, 1, ENC_BIG_ENDIAN);
1629 proto_tree_add_item(tree, hf_q933_odd_even_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
1630 offset += 1;
1631 len -= 1;
1632
1633 if (len == 0)
1634 return;
1635 proto_tree_add_item(tree, hf_q933_subaddress, tvb, offset, len, ENC_NA);
1636 }
1637
1638 /*
1639 * Dissect a High-layer compatibility information element.
1640 */
1641 #define Q933_AUDIOVISUAL 0x60
1642 static const value_string q933_high_layer_characteristics_vals[] = {
1643 { 0x01, "Telephony" },
1644 { 0x04, "F.182 Facsimile Group 2/3" },
1645 { 0x21, "F.184 Facsimile Group 4 Class I" },
1646 { 0x24, "F.230 Teletex, basic and mixed mode, and F.184 Facsimile Group 4, Classes II and III" },
1647 { 0x28, "F.220 Teletex, basic and processable mode" },
1648 { 0x31, "F.200 Teletex, basic mode" },
1649 { 0x32, "F.300 and T.102 syntax-based Videotex" },
1650 { 0x33, "F.300 and T.101 international Videotex interworking" },
1651 { 0x35, "F.60 Telex" },
1652 { 0x38, "X.400 Message Handling Systems" },
1653 { 0x41, "X.200 OSI application" },
1654 { 0x42, "FTAM application" },
1655 { 0x5E, "Reserved for maintenance" },
1656 { 0x5F, "Reserved for management" },
1657 { Q933_AUDIOVISUAL, "F.720/F.821 and F.731 Profile 1a videotelephony" },
1658 { 0x61, "F.702 and F.731 Profile 1b videoconferencing" },
1659 { 0x62, "F.702 and F.731 audiographic conferencing" },
1660 { 0, NULL }
1661 };
1662
1663 static const value_string q933_audiovisual_characteristics_vals[] = {
1664 { 0x01, "Capability set of initial channel of H.221" },
1665 { 0x02, "Capability set of subsequent channel of H.221" },
1666 { 0x21, "Capability set of initial channel of an active 3.1kHz audio or speech call" },
1667 { 0x00, NULL }
1668 };
1669
1670 static void
dissect_q933_high_layer_compat_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1671 dissect_q933_high_layer_compat_ie(tvbuff_t *tvb, int offset, int len,
1672 proto_tree *tree)
1673 {
1674 guint8 octet;
1675 guint8 coding_standard;
1676 guint8 characteristics;
1677
1678 if (len == 0)
1679 return;
1680 octet = tvb_get_guint8(tvb, offset);
1681 coding_standard = octet & 0x60;
1682 proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
1683 offset += 1;
1684 len -= 1;
1685 if (coding_standard != Q933_ITU_STANDARDIZED_CODING) {
1686 /*
1687 * We don't know how the call state is encoded,
1688 * so just dump it as data and be done with it.
1689 */
1690 proto_tree_add_item(tree, hf_q933_data, tvb, offset, len, ENC_NA);
1691 return;
1692 }
1693
1694 if (len == 0)
1695 return;
1696 octet = tvb_get_guint8(tvb, offset);
1697 characteristics = octet & 0x7F;
1698 proto_tree_add_item(tree, hf_q933_high_layer_characteristics_identification, tvb, offset, 1, ENC_BIG_ENDIAN);
1699 offset += 1;
1700 len -= 1;
1701
1702 if (!(octet & Q933_IE_VL_EXTENSION)) {
1703 if (len == 0)
1704 return;
1705 if (characteristics == Q933_AUDIOVISUAL) {
1706 proto_tree_add_item(tree, hf_q933_extended_audiovisual_characteristics_id, tvb, offset, 1, ENC_BIG_ENDIAN);
1707 } else {
1708 proto_tree_add_item(tree, hf_q933_extended_high_layer_characteristics_id, tvb, offset, 1, ENC_BIG_ENDIAN);
1709 }
1710 }
1711 }
1712
1713
1714 /*
1715 * Dissect a User-user information element.
1716 */
1717 #define Q933_PROTOCOL_DISCRIMINATOR_IA5 0x04
1718 #define Q933_PROTOCOL_DISCRIMINATOR_ASN1 0x05
1719
1720 static const value_string q933_protocol_discriminator_vals[] = {
1721 { 0x00, "User-specific protocol" },
1722 { 0x01, "OSI high layer protocols" },
1723 { 0x02, "X.244" },
1724 { Q933_PROTOCOL_DISCRIMINATOR_IA5, "IA5 characters" },
1725 { Q933_PROTOCOL_DISCRIMINATOR_ASN1, "X.208 and X.209 coded user information" },
1726 { 0x07, "V.120 rate adaption" },
1727 { 0x08, "Q.933/I.451 user-network call control messages" },
1728 { 0, NULL }
1729 };
1730
1731 static void
dissect_q933_user_user_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree)1732 dissect_q933_user_user_ie(tvbuff_t *tvb, int offset, int len,
1733 proto_tree *tree)
1734 {
1735 guint8 octet;
1736
1737 if (len == 0)
1738 return;
1739 octet = tvb_get_guint8(tvb, offset);
1740 proto_tree_add_item(tree, hf_q933_protocol_discriminator, tvb, offset, 1, ENC_BIG_ENDIAN);
1741 offset += 1;
1742 len -= 1;
1743
1744 if (len == 0)
1745 return;
1746 switch (octet) {
1747
1748 case Q933_PROTOCOL_DISCRIMINATOR_IA5:
1749 proto_tree_add_item(tree, hf_q933_user_information_str, tvb, offset, len, ENC_NA|ENC_ASCII);
1750 break;
1751
1752 default:
1753 proto_tree_add_item(tree, hf_q933_user_information_bytes, tvb, offset, len, ENC_NA);
1754 break;
1755 }
1756 }
1757
1758 /*
1759 * Dissect information elements consisting of ASCII^H^H^H^H^HIA5 text.
1760 */
1761 static void
dissect_q933_ia5_ie(tvbuff_t * tvb,int offset,int len,proto_tree * tree,int hf)1762 dissect_q933_ia5_ie(tvbuff_t *tvb, int offset, int len, proto_tree *tree, int hf)
1763 {
1764 if (len != 0) {
1765 proto_tree_add_item(tree, hf, tvb, offset, len, ENC_ASCII|ENC_NA);
1766 }
1767 }
1768
1769 static const value_string q933_codeset_vals[] = {
1770 { 0x00, "Q.933 information elements" },
1771 { 0x04, "Information elements for ISO/IEC use" },
1772 { 0x05, "Information elements for national use" },
1773 { 0x06, "Information elements specific to the local network" },
1774 { 0x07, "User-specific information elements" },
1775 { 0x00, NULL },
1776 };
1777
1778 static int
dissect_q933(tvbuff_t * tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)1779 dissect_q933(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
1780 {
1781 int offset = 0;
1782 proto_tree *q933_tree = NULL;
1783 proto_item *ti;
1784 proto_tree *ie_tree = NULL;
1785 guint8 call_ref_len;
1786 guint8 call_ref[16];
1787 guint8 message_type;
1788 guint8 info_element;
1789 guint16 info_element_len;
1790 int codeset, locked_codeset;
1791 gboolean non_locking_shift;
1792
1793 col_set_str(pinfo->cinfo, COL_PROTOCOL, "Q.933");
1794
1795 if (tree) {
1796 ti = proto_tree_add_item(tree, proto_q933, tvb, offset, -1,
1797 ENC_NA);
1798 q933_tree = proto_item_add_subtree(ti, ett_q933);
1799
1800 dissect_q933_protocol_discriminator(tvb, offset, q933_tree);
1801 }
1802 offset += 1;
1803 call_ref_len = tvb_get_guint8(tvb, offset) & 0xF; /* XXX - do as a bit field? */
1804 if (q933_tree != NULL)
1805 proto_tree_add_uint(q933_tree, hf_q933_call_ref_len, tvb, offset, 1, call_ref_len);
1806 offset += 1;
1807 if (call_ref_len != 0) {
1808 tvb_memcpy(tvb, call_ref, offset, call_ref_len);
1809 proto_tree_add_boolean(q933_tree, hf_q933_call_ref_flag,
1810 tvb, offset, 1, (call_ref[0] & 0x80) != 0);
1811 call_ref[0] &= 0x7F;
1812 proto_tree_add_bytes(q933_tree, hf_q933_call_ref,
1813 tvb, offset, call_ref_len, call_ref);
1814 offset += call_ref_len;
1815 }
1816 message_type = tvb_get_guint8(tvb, offset);
1817 col_add_str(pinfo->cinfo, COL_INFO,
1818 val_to_str(message_type, q933_message_type_vals,
1819 "Unknown message type (0x%02X)"));
1820
1821 proto_tree_add_uint(q933_tree, hf_q933_message_type, tvb, offset, 1, message_type);
1822 offset += 1;
1823
1824 /*
1825 * And now for the information elements....
1826 */
1827 codeset = locked_codeset = 0; /* start out in codeset 0 */
1828 while (tvb_reported_length_remaining(tvb, offset) > 0) {
1829 info_element = tvb_get_guint8(tvb, offset);
1830
1831 /* Check for the codeset shift */
1832 if ((info_element & Q933_IE_SO_MASK) &&
1833 ((info_element & Q933_IE_SO_IDENTIFIER_MASK) == Q933_IE_SHIFT)) {
1834 non_locking_shift = info_element & Q933_IE_SHIFT_NON_LOCKING;
1835 codeset = info_element & Q933_IE_SHIFT_CODESET;
1836 if (!non_locking_shift)
1837 locked_codeset = codeset;
1838 proto_tree_add_item(q933_tree, non_locking_shift ? hf_q933_non_locking_shift_to_codeset : hf_q933_locking_shift_to_codeset, tvb, offset, 1, ENC_NA);
1839 offset += 1;
1840 continue;
1841 }
1842
1843 /*
1844 * Check for the single-octet IEs.
1845 */
1846 if (info_element & Q933_IE_SO_MASK) {
1847 switch ((codeset << 8) | (info_element & Q933_IE_SO_IDENTIFIER_MASK)) {
1848
1849 case CS0 | Q933_IE_REPEAT_INDICATOR:
1850 proto_tree_add_item(q933_tree, hf_q933_repeat_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
1851 break;
1852
1853 default:
1854 proto_tree_add_expert_format(q933_tree, pinfo, &ei_q933_information_element, tvb, offset, 1,
1855 "Unknown information element (0x%02X)", info_element);
1856 break;
1857 }
1858 offset += 1;
1859 codeset = locked_codeset;
1860 continue;
1861 }
1862
1863 /*
1864 * Variable-length IE.
1865 */
1866 info_element_len = tvb_get_guint8(tvb, offset + 1);
1867 if (q933_tree != NULL) {
1868 ie_tree = proto_tree_add_subtree(q933_tree, tvb, offset,
1869 1+1+info_element_len, ett_q933_ie, NULL,
1870 val_to_str(info_element, q933_info_element_vals[codeset],
1871 "Unknown information element (0x%02X)"));
1872 proto_tree_add_uint_format_value(ie_tree, hf_q933_information_element, tvb, offset, 1, info_element,
1873 "%s", val_to_str(info_element, q933_info_element_vals[codeset], "Unknown (0x%02X)"));
1874 proto_tree_add_item(ie_tree, hf_q933_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
1875
1876 switch ((codeset << 8) | info_element) {
1877
1878 case CS0 | Q933_IE_SEGMENTED_MESSAGE:
1879 dissect_q933_segmented_message_ie(tvb,
1880 pinfo, offset + 2, info_element_len,
1881 ie_tree);
1882 break;
1883
1884 case CS0 | Q933_IE_BEARER_CAPABILITY:
1885 case CS0 | Q933_IE_LOW_LAYER_COMPAT:
1886 dissect_q933_bearer_capability_ie(tvb,
1887 offset + 2, info_element_len,
1888 ie_tree);
1889 break;
1890
1891 case CS0 | Q933_IE_CAUSE:
1892 dissect_q933_cause_ie(tvb,
1893 offset + 2, info_element_len,
1894 ie_tree,
1895 hf_q933_cause_value);
1896 break;
1897
1898 case CS0 | Q933_IE_CALL_STATE:
1899 dissect_q933_call_state_ie(tvb,
1900 offset + 2, info_element_len,
1901 ie_tree);
1902 break;
1903
1904 case CS0 | Q933_IE_CHANNEL_IDENTIFICATION:
1905 dissect_q933_channel_identification_ie(
1906 tvb, offset + 2, info_element_len,
1907 ie_tree);
1908 break;
1909
1910 case CS0 | Q933_IE_PROGRESS_INDICATOR:
1911 dissect_q933_progress_indicator_ie(tvb,
1912 offset + 2, info_element_len,
1913 ie_tree);
1914 break;
1915
1916 case CS0 | Q933_IE_NETWORK_SPECIFIC_FACIL:
1917 case CS0 | Q933_IE_TRANSIT_NETWORK_SEL:
1918 dissect_q933_ns_facilities_ie(tvb,
1919 offset + 2, info_element_len,
1920 ie_tree);
1921 break;
1922
1923 case CS0 | Q933_IE_DISPLAY:
1924 dissect_q933_ia5_ie(tvb, offset + 2,
1925 info_element_len, ie_tree,
1926 hf_q933_display_information);
1927 break;
1928
1929 case CS0 | Q933_IE_E2E_TRANSIT_DELAY:
1930 dissect_q933_e2e_transit_delay_ie(tvb,
1931 pinfo, offset + 2, info_element_len,
1932 ie_tree);
1933 break;
1934
1935 case CS0 | Q933_IE_TD_SELECTION_AND_INT:
1936 dissect_q933_td_selection_and_int_ie(
1937 tvb, pinfo, offset + 2, info_element_len,
1938 ie_tree);
1939 break;
1940
1941 case CS0 | Q933_IE_PL_BINARY_PARAMETERS:
1942 dissect_q933_pl_binary_parameters_ie(
1943 tvb, offset + 2, info_element_len,
1944 ie_tree);
1945 break;
1946
1947 case CS0 | Q933_IE_REVERSE_CHARGE_IND:
1948 dissect_q933_reverse_charge_ind_ie(tvb,
1949 offset + 2, info_element_len,
1950 ie_tree);
1951 break;
1952
1953 case CS0 | Q933_IE_CALLING_PARTY_NUMBER:
1954 dissect_q933_number_ie(tvb,
1955 offset + 2, info_element_len,
1956 ie_tree,
1957 hf_q933_calling_party_number);
1958 break;
1959
1960 case CS0 | Q933_IE_CONNECTED_NUMBER:
1961 dissect_q933_number_ie(tvb,
1962 offset + 2, info_element_len,
1963 ie_tree,
1964 hf_q933_connected_number);
1965 break;
1966
1967 case CS0 | Q933_IE_CALLED_PARTY_NUMBER:
1968 dissect_q933_number_ie(tvb,
1969 offset + 2, info_element_len,
1970 ie_tree,
1971 hf_q933_called_party_number);
1972 break;
1973
1974 case CS0 | Q933_IE_CALLING_PARTY_SUBADDR:
1975 case CS0 | Q933_IE_CALLED_PARTY_SUBADDR:
1976 dissect_q933_party_subaddr_ie(tvb,
1977 offset + 2, info_element_len,
1978 ie_tree);
1979 break;
1980
1981 case CS0 | Q933_IE_HIGH_LAYER_COMPAT:
1982 dissect_q933_high_layer_compat_ie(tvb,
1983 offset + 2, info_element_len,
1984 ie_tree);
1985 break;
1986
1987 case CS0 | Q933_IE_USER_USER:
1988 dissect_q933_user_user_ie(tvb,
1989 offset + 2, info_element_len,
1990 ie_tree);
1991 break;
1992
1993
1994 case CS0 | Q933_IE_REPORT_TYPE:
1995 case CS5 | Q933_IE_REPORT_TYPE:
1996 case CS5 | Q933_IE_ANSI_REPORT_TYPE:
1997 dissect_q933_report_type_ie(tvb,
1998 offset + 2, info_element_len,
1999 ie_tree);
2000 break;
2001
2002 case CS0 | Q933_IE_LINK_INTEGRITY_VERF:
2003 case CS5 | Q933_IE_LINK_INTEGRITY_VERF:
2004 case CS5 | Q933_IE_ANSI_LINK_INTEGRITY_VERF:
2005 dissect_q933_link_integrity_verf_ie(tvb,
2006 offset + 2, info_element_len,
2007 ie_tree);
2008 break;
2009
2010 case CS0 | Q933_IE_PVC_STATUS:
2011 case CS5 | Q933_IE_PVC_STATUS:
2012 case CS5 | Q933_IE_ANSI_PVC_STATUS:
2013 dissect_q933_pvc_status_ie(tvb,
2014 offset + 2, info_element_len,
2015 ie_tree);
2016 break;
2017
2018 default:
2019 proto_tree_add_item(ie_tree, hf_q933_data, tvb, offset + 2, info_element_len, ENC_NA);
2020 break;
2021 }
2022 }
2023 offset += 1 + 1 + info_element_len;
2024 codeset = locked_codeset;
2025 }
2026 return tvb_captured_length(tvb);
2027 }
2028
2029 void
proto_register_q933(void)2030 proto_register_q933(void)
2031 {
2032 static hf_register_info hf[] = {
2033 { &hf_q933_discriminator,
2034 { "Protocol discriminator", "q933.disc", FT_UINT8, BASE_HEX, NULL, 0x0,
2035 NULL, HFILL }},
2036
2037 { &hf_q933_call_ref_flag,
2038 { "Call reference flag", "q933.call_ref_flag", FT_BOOLEAN, BASE_NONE, TFS(&tfs_call_ref_flag), 0x0,
2039 NULL, HFILL }},
2040
2041 { &hf_q933_call_ref,
2042 { "Call reference value", "q933.call_ref", FT_BYTES, BASE_NONE, NULL, 0x0,
2043 NULL, HFILL }},
2044
2045
2046 { &hf_q933_coding_standard,
2047 { "Coding standard", "q933.coding_standard", FT_UINT8, BASE_HEX,
2048 VALS(q933_coding_standard_vals), 0x60,NULL, HFILL }},
2049
2050 { &hf_q933_information_transfer_capability,
2051 { "Information transfer capability", "q933.information_transfer_capability", FT_UINT8, BASE_HEX,
2052 VALS(q933_information_transfer_capability_vals), 0x1f,NULL, HFILL }},
2053
2054 { &hf_q933_transfer_mode,
2055 { "Transfer mode", "q933.transfer_mode", FT_UINT8, BASE_HEX,
2056 VALS(q933_transfer_mode_vals), 0x60,NULL, HFILL }},
2057
2058 { &hf_q933_uil1,
2059 { "User information layer 1 protocol", "q933.uil1", FT_UINT8, BASE_HEX,
2060 VALS(q933_uil1_vals), 0x1f,NULL, HFILL }},
2061
2062 { &hf_q933_call_ref_len,
2063 { "Call reference value length", "q933.call_ref_len", FT_UINT8, BASE_DEC, NULL, 0x0,
2064 NULL, HFILL }},
2065
2066 { &hf_q933_message_type,
2067 { "Message type", "q933.message_type", FT_UINT8, BASE_HEX, VALS(q933_message_type_vals), 0x0,
2068 NULL, HFILL }},
2069
2070 { &hf_q933_cause_location,
2071 { "Cause location", "q933.cause_location", FT_UINT8, BASE_DEC, VALS(q933_cause_location_vals), 0x0f,
2072 NULL, HFILL }},
2073
2074 { &hf_q933_cause_value,
2075 { "Cause value", "q933.cause_value", FT_UINT8, BASE_DEC, VALS(q933_cause_code_vals), 0x7f,
2076 NULL, HFILL }},
2077
2078 { &hf_q933_number_type,
2079 { "Number type", "q933.number_type", FT_UINT8, BASE_HEX, VALS(q933_number_type_vals), 0x70,
2080 NULL, HFILL }},
2081
2082 { &hf_q933_numbering_plan,
2083 { "numbering plan", "q933.numbering_plan", FT_UINT8, BASE_HEX, VALS(q933_numbering_plan_vals), 0x0f,
2084 NULL, HFILL }},
2085
2086 { &hf_q933_screening_ind,
2087 { "Screening indicator", "q933.screening_ind", FT_UINT8, BASE_HEX, VALS(q933_screening_indicator_vals), 0x03,
2088 NULL, HFILL }},
2089
2090 { &hf_q933_presentation_ind,
2091 { "Presentation indicator", "q933.presentation_ind", FT_UINT8, BASE_HEX, VALS(q933_presentation_indicator_vals), 0x60,
2092 NULL, HFILL }},
2093
2094 { &hf_q933_extension_ind,
2095 { "Extension indicator", "q933.extension_ind",
2096 FT_BOOLEAN, 8, TFS(&q933_extension_ind_value), 0x80,
2097 NULL, HFILL }},
2098
2099 { &hf_q933_calling_party_number,
2100 { "Calling party number digits", "q933.calling_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
2101 NULL, HFILL }},
2102
2103 { &hf_q933_called_party_number,
2104 { "Called party number digits", "q933.called_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
2105 NULL, HFILL }},
2106
2107 { &hf_q933_connected_number,
2108 { "Connected party number digits", "q933.connected_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
2109 NULL, HFILL }},
2110
2111 #if 0
2112 { &hf_q933_redirecting_number,
2113 { "Redirecting party number digits", "q933.redirecting_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
2114 NULL, HFILL }},
2115 #endif
2116 { &hf_q933_report_type,
2117 { "Report type", "q933.report_type", FT_UINT8, BASE_DEC, VALS(q933_report_type_vals), 0x0,
2118 NULL, HFILL }},
2119 { &hf_q933_link_verf_txseq,
2120 { "TX Sequence", "q933.link_verification.txseq", FT_UINT8, BASE_DEC, NULL, 0x0,
2121 NULL, HFILL }},
2122 { &hf_q933_link_verf_rxseq,
2123 { "RX Sequence", "q933.link_verification.rxseq", FT_UINT8, BASE_DEC, NULL, 0x0,
2124 NULL, HFILL }},
2125 { &hf_q933_data,
2126 { "Data", "q933.data", FT_BYTES, BASE_NONE, NULL, 0x0,
2127 NULL, HFILL }},
2128
2129 /* Generated from convert_proto_tree_add_text.pl */
2130 { &hf_q933_first_segment, { "First segment", "q933.first_segment", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_segment_remaining, 0x7F, NULL, HFILL }},
2131 { &hf_q933_not_first_segment, { "Not first segment", "q933.not_first_segment", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_segment_remaining, 0x7F, NULL, HFILL }},
2132 { &hf_q933_segmented_message_type, { "Segmented message type", "q933.segmented_message_type", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2133 { &hf_q933_out_band_negotiation, { "Out-band negotiation", "q933.out_band_negotiation", FT_BOOLEAN, 8, TFS(&tfs_possible_not_possible), 0x40, NULL, HFILL }},
2134 { &hf_q933_layer_1, { "Layer 1", "q933.layer_1", FT_BOOLEAN, 8, TFS(&tfs_asynchronous_synchronous), 0x40, NULL, HFILL }},
2135 { &hf_q933_user_rate, { "User rate", "q933.user_rate", FT_UINT8, BASE_DEC, VALS(q933_l1_user_rate_vals), 0x1F, NULL, HFILL }},
2136 { &hf_q933_rate_adaption_header, { "Rate adaption header", "q933.rate_adaption_header", FT_BOOLEAN, 8, TFS(&tfs_included_not_included), 0x40, NULL, HFILL }},
2137 { &hf_q933_multiple_frame_establishment, { "Multiple frame establishment", "q933.multiple_frame_establishment", FT_BOOLEAN, 8, TFS(&tfs_supported_not_supported), 0x20, NULL, HFILL }},
2138 { &hf_q933_mode_of_operation, { "Mode of operation", "q933.mode_of_operation", FT_BOOLEAN, 8, TFS(&tfs_protocol_sensative_bit_transparent), 0x10, NULL, HFILL }},
2139 { &hf_q933_stop_bits, { "Stop bits", "q933.stop_bits", FT_UINT8, BASE_DEC, VALS(q933_l1_stop_bits_vals), 0x60, NULL, HFILL }},
2140 { &hf_q933_data_bits, { "Data bits", "q933.data_bits", FT_UINT8, BASE_DEC, VALS(q933_l1_data_bits_vals), 0x18, NULL, HFILL }},
2141 { &hf_q933_parity, { "Parity", "q933.parity", FT_UINT8, BASE_DEC, VALS(q933_l1_parity_vals), 0x07, NULL, HFILL }},
2142 { &hf_q933_duplex, { "Duplex", "q933.duplex", FT_BOOLEAN, 8, TFS(&tfs_full_half), 0x40, NULL, HFILL }},
2143 { &hf_q933_modem_type, { "Modem type (Network-specific rules)", "q933.modem_type", FT_UINT8, BASE_HEX, NULL, 0x3F, NULL, HFILL }},
2144 { &hf_q933_user_information_layer_2_protocol, { "User information layer 2 protocol", "q933.user_information_layer_2_protocol", FT_UINT8, BASE_HEX, VALS(q933_uil2_vals), 0x1F, NULL, HFILL }},
2145 { &hf_q933_user_specified_layer_2_protocol_information, { "User-specified layer 2 protocol information", "q933.user_specified_layer_2_protocol_information", FT_UINT8, BASE_HEX, NULL, 0x7F, NULL, HFILL }},
2146 { &hf_q933_address_inclusion, { "Address inclusion", "q933.address_inclusion", FT_UINT8, BASE_HEX, VALS(q933_address_inclusion_vals), 0x03, NULL, HFILL }},
2147 { &hf_q933_user_information_layer_3_protocol, { "User information layer 3 protocol", "q933.user_information_layer_3_protocol", FT_UINT8, BASE_HEX, VALS(q933_uil3_vals), 0x1F, NULL, HFILL }},
2148 { &hf_q933_mode, { "Mode", "q933.mode", FT_UINT8, BASE_HEX, VALS(q933_mode_vals), 0x60, NULL, HFILL }},
2149 { &hf_q933_default_packet_size_0F, { "Default packet size", "q933.default_packet_size", FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL }},
2150 { &hf_q933_packet_window_size, { "Packet window size", "q933.packet_window_size", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL }},
2151 { &hf_q933_default_packet_size, { "Default packet size", "q933.default_packet_size", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_octet_octets, 0x0, NULL, HFILL }},
2152 { &hf_q933_additional_layer_3_protocol_information, { "Additional layer 3 protocol information", "q933.additional_layer_3_protocol_information", FT_UINT16, BASE_HEX, VALS(nlpid_vals), 0x0FF0, NULL, HFILL }},
2153 { &hf_q933_recommendation, { "Recommendation", "q933.recommendation", FT_UINT8, BASE_HEX, VALS(q933_cause_recommendation_vals), 0x7F, NULL, HFILL }},
2154 { &hf_q933_network_service, { "Network service", "q933.network_service", FT_BOOLEAN, 8, TFS(&tfs_user_provider), 0x80, NULL, HFILL }},
2155 { &hf_q933_condition_normal, { "Condition", "q933.condition_normal", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
2156 { &hf_q933_condition, { "Condition", "q933.condition", FT_UINT8, BASE_HEX, VALS(q933_cause_condition_vals), 0x03, NULL, HFILL }},
2157 { &hf_q933_rejection_reason, { "Rejection reason", "q933.rejection_reason", FT_UINT8, BASE_HEX, VALS(q933_rejection_reason_vals), 0x7C, NULL, HFILL }},
2158 { &hf_q933_user_specific_diagnostic, { "User specific diagnostic", "q933.user_specific_diagnostic", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2159 { &hf_q933_missing_information_element, { "Missing information element", "q933.missing_information_element", FT_UINT8, BASE_HEX, VALS(q933_info_element_vals0), 0x0, NULL, HFILL }},
2160 { &hf_q933_insufficient_information_element, { "Insufficient information element", "q933.insufficient_information_element", FT_UINT8, BASE_HEX, VALS(q933_info_element_vals0), 0x0, NULL, HFILL }},
2161 { &hf_q933_diagnostic, { "Diagnostic", "q933.diagnostic", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2162 { &hf_q933_information_element, { "Information element", "q933.information_element", FT_UINT8, BASE_HEX, VALS(q933_info_element_vals0), 0x0, NULL, HFILL }},
2163 { &hf_q933_timer, { "Timer", "q933.timer", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2164 { &hf_q933_call_state, { "Call state", "q933.call_state", FT_UINT8, BASE_HEX, VALS(q933_call_state_vals), 0x3F, NULL, HFILL }},
2165 { &hf_q933_dlci, { "DLCI", "q933.dlci", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2166 { &hf_q933_status, { "Status", "q933.status", FT_UINT8, BASE_DEC, VALS(q933_pvc_status_vals), 0x0E, NULL, HFILL }},
2167 { &hf_q933_interface_identified, { "Interface", "q933.interface_identified", FT_BOOLEAN, 8, TFS(&tfs_explicitly_implicitly_identified), Q933_INTERFACE_IDENTIFIED, NULL, HFILL }},
2168 { &hf_q933_interface_basic, { "Interface", "q933.interface_basic", FT_BOOLEAN, 8, TFS(&tfs_not_basic_basic), Q933_NOT_BASIC_CHANNEL, NULL, HFILL }},
2169 { &hf_q933_indicated_channel_required, { "Indicated channel", "q933.indicated_channel_required", FT_BOOLEAN, 8, TFS(&tfs_required_preferred), 0x08, NULL, HFILL }},
2170 { &hf_q933_indicated_channel_d_channel, { "Indicated channel", "q933.indicated_channel_d_channel", FT_BOOLEAN, 8, TFS(&tfs_dchannel_not_dchannel), 0x04, NULL, HFILL }},
2171 { &hf_q933_not_channel_selection, { "Channel selection", "q933.channel_selection", FT_UINT8, BASE_HEX, VALS(q933_not_basic_channel_selection_vals), 0x03, NULL, HFILL }},
2172 { &hf_q933_channel_selection, { "Channel selection", "q933.channel_selection", FT_UINT8, BASE_HEX, VALS(q933_basic_channel_selection_vals), 0x03, NULL, HFILL }},
2173 { &hf_q933_interface_identifier, { "Interface identifier", "q933.interface_identifier", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2174 { &hf_q933_channel_indicated_by, { "Channel indicated by", "q933.channel_indicated_by", FT_BOOLEAN, 8, TFS(&tfs_slot_map_number), Q933_IS_SLOT_MAP, NULL, HFILL }},
2175 { &hf_q933_map_element_type, { "Map element type", "q933.map_element_type", FT_UINT8, BASE_HEX, VALS(q933_element_type_vals), 0x0F, NULL, HFILL }},
2176 { &hf_q933_channel_type, { "Channel", "q933.channel_type", FT_UINT8, BASE_HEX, VALS(q933_element_type_vals), 0x0F, NULL, HFILL }},
2177 { &hf_q933_location, { "Location", "q933.location", FT_UINT8, BASE_HEX, VALS(q933_cause_location_vals), 0x0F, NULL, HFILL }},
2178 { &hf_q933_progress_description, { "Progress description", "q933.progress_description", FT_UINT8, BASE_HEX, VALS(q933_progress_description_vals), 0x7F, NULL, HFILL }},
2179 { &hf_q933_network_identification_length, { "Network identification length", "q933.network_identification_length", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL }},
2180 { &hf_q933_type_of_network_identification, { "Type of network identification", "q933.type_of_network_identification", FT_UINT8, BASE_HEX, VALS(q933_netid_type_vals), 0x70, NULL, HFILL }},
2181 { &hf_q933_network_identification_plan, { "Network identification plan", "q933.network_identification_plan", FT_UINT8, BASE_HEX, VALS(q933_netid_plan_vals), 0x0F, NULL, HFILL }},
2182 { &hf_q933_network_identification, { "Network identification", "q933.network_identification", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2183 { &hf_q933_network_specific_facility_specification, { "Network-specific facility specification", "q933.network_specific_facility_specification", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2184 { &hf_q933_confirmation, { "Confirmation", "q933.confirmation", FT_BOOLEAN, 8, TFS(&tfs_link_by_link_end_to_end), 0x02, NULL, HFILL }},
2185 { &hf_q933_reverse_charging_indication, { "Reverse charging indication", "q933.reverse_charging_indication", FT_UINT8, BASE_HEX, VALS(q933_reverse_charging_indication_vals), 0x07, NULL, HFILL }},
2186 { &hf_q933_reason_for_redirection, { "Reason for redirection", "q933.reason_for_redirection", FT_UINT8, BASE_HEX, VALS(q933_redirection_reason_vals), 0x0F, NULL, HFILL }},
2187 { &hf_q933_type_of_subaddress, { "Type of subaddress", "q933.type_of_subaddress", FT_UINT8, BASE_HEX, VALS(q933_subaddress_type_vals), 0x70, NULL, HFILL }},
2188 { &hf_q933_odd_even_indicator, { "Odd/even indicator", "q933.odd_even_indicator", FT_UINT8, BASE_HEX, VALS(q933_odd_even_indicator_vals), 0x10, NULL, HFILL }},
2189 { &hf_q933_subaddress, { "Subaddress", "q933.subaddress", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2190 { &hf_q933_high_layer_characteristics_identification, { "High layer characteristics identification", "q933.high_layer_characteristics_identification", FT_UINT8, BASE_HEX, VALS(q933_high_layer_characteristics_vals), 0x7F, NULL, HFILL }},
2191 { &hf_q933_extended_audiovisual_characteristics_id, { "Extended audiovisual characteristics identification", "q933.extended_audiovisual_characteristics_id", FT_UINT8, BASE_HEX, VALS(q933_audiovisual_characteristics_vals), 0x7F, NULL, HFILL }},
2192 { &hf_q933_extended_high_layer_characteristics_id, { "Extended high layer characteristics identification", "q933.extended_high_layer_characteristics_id", FT_UINT8, BASE_HEX, VALS(q933_high_layer_characteristics_vals), 0x7F, NULL, HFILL }},
2193 { &hf_q933_protocol_discriminator, { "Protocol discriminator", "q933.protocol_discriminator", FT_UINT8, BASE_HEX, VALS(q933_protocol_discriminator_vals), 0x0, NULL, HFILL }},
2194 { &hf_q933_user_information_str, { "User information", "q933.user_information_str", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2195 { &hf_q933_user_information_bytes, { "User information", "q933.user_information_bytes", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2196 { &hf_q933_locking_shift_to_codeset, { "Locking shift to codeset", "q933.locking_shift_to_codeset", FT_UINT8, BASE_DEC, VALS(q933_codeset_vals), Q933_IE_SHIFT_CODESET, NULL, HFILL }},
2197 { &hf_q933_non_locking_shift_to_codeset, { "Non-locking shift to codeset", "q933.non_locking_shift_to_codeset", FT_UINT8, BASE_DEC, VALS(q933_codeset_vals), Q933_IE_SHIFT_CODESET, NULL, HFILL }},
2198 { &hf_q933_repeat_indicator, { "Repeat indicator", "q933.repeat_indicator", FT_UINT8, BASE_HEX, VALS(q933_repeat_indication_vals), Q933_IE_SO_IE_MASK, NULL, HFILL }},
2199 { &hf_q933_length, { "Length", "q933.length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
2200 { &hf_q933_diagnostics, { "Diagnostics", "q933.diagnostics", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2201 { &hf_q933_display_information, { "Display information", "q933.display_information", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
2202 { &hf_q933_cumulative_transit_delay, { "Cumulative transit delay", "q933.cumulative_transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
2203 { &hf_q933_requested_end_to_end_transit_delay, { "Requested end-to-end transit delay", "q933.requested_end_to_end_transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
2204 { &hf_q933_max_end_to_end_transit_delay, { "Maximum end-to-end transit delay", "q933.max_end_to_end_transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
2205 { &hf_q933_transit_delay, { "Transit Delay", "q933.transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
2206 { &hf_q933_request, { "Request", "q933.request", FT_BOOLEAN, 8, TFS(&tfs_no_request_request_indicated), 0x04, NULL, HFILL }},
2207
2208 };
2209 static gint *ett[] = {
2210 &ett_q933,
2211 &ett_q933_ie,
2212 };
2213
2214 static ei_register_info ei[] = {
2215 { &ei_q933_invalid_length, { "q933.invalid_length", PI_MALFORMED, PI_ERROR, "Invalid length", EXPFILL }},
2216 { &ei_q933_information_element, { "q933.information_element.unknown", PI_PROTOCOL, PI_WARN, "Unknown information element", EXPFILL }},
2217 };
2218 expert_module_t* expert_q933;
2219
2220 proto_q933 = proto_register_protocol("Q.933", "Q.933", "q933");
2221 proto_register_field_array (proto_q933, hf, array_length(hf));
2222 proto_register_subtree_array(ett, array_length(ett));
2223 expert_q933 = expert_register_protocol(proto_q933);
2224 expert_register_field_array(expert_q933, ei, array_length(ei));
2225
2226 q933_handle = register_dissector("q933", dissect_q933, proto_q933);
2227 }
2228
2229 void
proto_reg_handoff_q933(void)2230 proto_reg_handoff_q933(void)
2231 {
2232 dissector_add_uint("fr.osinl", NLPID_Q_933, q933_handle);
2233 dissector_add_uint("juniper.proto", JUNIPER_PROTO_Q933, q933_handle);
2234 }
2235
2236 /*
2237 * Editor modelines - https://www.wireshark.org/tools/modelines.html
2238 *
2239 * Local variables:
2240 * c-basic-offset: 8
2241 * tab-width: 8
2242 * indent-tabs-mode: t
2243 * End:
2244 *
2245 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
2246 * :indentSize=8:tabSize=8:noTabs=false:
2247 */
2248