1 /* packet-iua.c
2 * Routines for ISDN Q.921-User Adaptation Layer dissection
3 *
4 * It is hopefully (needs testing) compliant to
5 * https://tools.ietf.org/html/rfc3057
6 * https://tools.ietf.org/html/draft-ietf-sigtran-iua-imp-guide-01
7 * To do: - provide better handling of length parameters
8 *
9 * Copyright 2002, Michael Tuexen <tuexen [AT] fh-muenster.de>
10 *
11 * Wireshark - Network traffic analyzer
12 * By Gerald Combs <gerald@wireshark.org>
13 * Copyright 1998 Gerald Combs
14 *
15 * Copied from README.developer
16 *
17 * SPDX-License-Identifier: GPL-2.0-or-later
18 */
19
20 #include "config.h"
21
22 #include <epan/packet.h>
23 #include <epan/prefs.h>
24 #include <epan/sctpppids.h>
25 #include <epan/lapd_sapi.h>
26 #include <wsutil/str_util.h>
27
28 void proto_register_iua(void);
29 void proto_reg_handoff_iua(void);
30
31 static module_t *iua_module;
32
33 static dissector_table_t lapd_gsm_sapi_dissector_table;
34
35 /* Whether to use GSM SAPI vals or not */
36 static gboolean global_iua_gsm_sapis = TRUE;
37
38 /* Initialize the protocol and registered fields */
39 static int proto_iua = -1;
40 static int hf_int_interface_id = -1;
41 static int hf_text_interface_id = -1;
42 static int hf_info_string = -1;
43 static int hf_dlci_zero_bit = -1;
44 static int hf_dlci_spare_bit = -1;
45 static int hf_dlci_sapi = -1;
46 static int hf_dlci_gsm_sapi = -1;
47 static int hf_dlci_one_bit = -1;
48 static int hf_dlci_tei = -1;
49 static int hf_dlci_spare = -1;
50 static int hf_diag_info = -1;
51 static int hf_interface_range_start = -1;
52 static int hf_interface_range_end = -1;
53 static int hf_heartbeat_data = -1;
54 static int hf_asp_reason = -1;
55 static int hf_traffic_mode_type = -1;
56 static int hf_error_code = -1;
57 static int hf_error_code_ig = -1;
58 static int hf_status_type = -1;
59 static int hf_status_id = -1;
60 static int hf_release_reason = -1;
61 static int hf_tei_status = -1;
62 static int hf_asp_id = -1;
63 static int hf_parameter_tag = -1;
64 static int hf_parameter_tag_ig = -1;
65 static int hf_parameter_length = -1;
66 static int hf_parameter_value = -1;
67 static int hf_parameter_padding = -1;
68 static int hf_version = -1;
69 static int hf_reserved = -1;
70 static int hf_message_class = -1;
71 static int hf_message_type = -1;
72 static int hf_message_length = -1;
73
74 /* Initialize the subtree pointers */
75 static gint ett_iua = -1;
76 static gint ett_iua_parameter = -1;
77
78 /* stores the current SAPI value */
79 static guint8 sapi_val;
80 static gboolean sapi_val_assigned = FALSE;
81
82 /* option setable via preferences, default is plain RFC 3057 */
83 static gboolean support_IG = FALSE;
84
85 static dissector_handle_t q931_handle;
86 static dissector_handle_t x25_handle;
87 static dissector_handle_t iua_handle;
88
89 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
90
91 #define PARAMETER_TAG_LENGTH 2
92 #define PARAMETER_LENGTH_LENGTH 2
93 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
94
95 #define PARAMETER_TAG_OFFSET 0
96 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
97 #define PARAMETER_VALUE_OFFSET (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
98 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
99
100 #define INT_INTERFACE_ID_LENGTH 4
101
102 static void
dissect_int_interface_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)103 dissect_int_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
104 {
105 guint16 number_of_ids, id_number;
106 gint offset;
107
108 number_of_ids= (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) / INT_INTERFACE_ID_LENGTH;
109 offset = PARAMETER_VALUE_OFFSET;
110
111 proto_item_append_text(parameter_item, " (");
112 for (id_number = 0; id_number < number_of_ids; id_number++) {
113 proto_tree_add_item(parameter_tree, hf_int_interface_id, parameter_tvb, offset, INT_INTERFACE_ID_LENGTH, ENC_BIG_ENDIAN);
114 proto_item_append_text(parameter_item, (id_number > 0) ? ", %d" : "%d", tvb_get_ntohl(parameter_tvb, offset));
115 offset += INT_INTERFACE_ID_LENGTH;
116 }
117 proto_item_append_text(parameter_item, ")");
118 }
119
120 #define TEXT_INTERFACE_ID_OFFSET PARAMETER_VALUE_OFFSET
121
122 static void
dissect_text_interface_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)123 dissect_text_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
124 {
125 guint16 interface_id_length;
126
127 interface_id_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
128
129 proto_tree_add_item(parameter_tree, hf_text_interface_id, parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length, ENC_ASCII|ENC_NA);
130 proto_item_append_text(parameter_item, " (%.*s)", interface_id_length,
131 tvb_format_text(wmem_packet_scope(), parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length));
132 }
133
134 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
135
136 static void
dissect_info_string_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)137 dissect_info_string_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
138 {
139 guint16 info_string_length;
140
141 info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
142 proto_tree_add_item(parameter_tree, hf_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, ENC_ASCII|ENC_NA);
143 proto_item_append_text(parameter_item, " (%.*s)", info_string_length,
144 tvb_format_text(wmem_packet_scope(), parameter_tvb, INFO_STRING_OFFSET, info_string_length));
145 }
146
147 #define DLCI_SAPI_LENGTH 1
148 #define DLCI_TEI_LENGTH 1
149 #define DLCI_SPARE_LENGTH 2
150
151 #define DLCI_SAPI_OFFSET PARAMETER_VALUE_OFFSET
152 #define DLCI_TEI_OFFSET (DLCI_SAPI_OFFSET + DLCI_SAPI_LENGTH)
153 #define DLCI_SPARE_OFFSET (DLCI_TEI_OFFSET + DLCI_TEI_LENGTH)
154
155 #define ZERO_BIT_MASK 0x01
156 #define SPARE_BIT_MASK 0x02
157 #define SAPI_MASK 0xfc
158 #define SAPI_SHIFT 2
159 #define ONE_BIT_MASK 0x01
160 #define TEI_MASK 0xfe
161
162 /* SAPI values taken from Q.921 */
163 #define SAPI_VAL_CALL_CONTROL 0
164 #define SAPI_VAL_Q931_PACKET 1
165 #define SAPI_VAL_TELACTION 12
166 #define SAPI_VAL_X25 16
167 #define SAPI_VAL_LAYER_2 63
168 static const value_string sapi_values[] = {
169 { SAPI_VAL_CALL_CONTROL, "Call control procedures" },
170 { SAPI_VAL_Q931_PACKET, "Q.931 packet mode communication" },
171 { SAPI_VAL_TELACTION, "Teleaction communication" },
172 { SAPI_VAL_X25, "X.25 packet communication" },
173 { SAPI_VAL_LAYER_2, "Layer 2 management procedures" },
174 { 0, NULL }
175 };
176
177 static const value_string gsm_sapi_vals[] = {
178 { LAPD_GSM_SAPI_RA_SIG_PROC, "Radio signalling procedures" },
179 { LAPD_GSM_SAPI_NOT_USED_1, "(Not used in GSM PLMN)" },
180 { LAPD_GSM_SAPI_NOT_USED_16, "(Not used in GSM PLMN)" },
181 { LAPD_GSM_SAPI_OM_PROC, "Operation and maintenance procedure" },
182 { LAPD_SAPI_L2, "Layer 2 management procedures" },
183 { 0, NULL }
184 };
185
186 static void
dissect_dlci_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)187 dissect_dlci_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
188 {
189 proto_tree_add_item(parameter_tree, hf_dlci_zero_bit, parameter_tvb, DLCI_SAPI_OFFSET, DLCI_SAPI_LENGTH, ENC_BIG_ENDIAN);
190 proto_tree_add_item(parameter_tree, hf_dlci_spare_bit, parameter_tvb, DLCI_SAPI_OFFSET, DLCI_SAPI_LENGTH, ENC_BIG_ENDIAN);
191 /* Add the SAPI + some explanatory text, store the SAPI value so that we can later how to
192 * dissect the protocol data */
193 if(global_iua_gsm_sapis) {
194 proto_tree_add_item(parameter_tree, hf_dlci_gsm_sapi, parameter_tvb, DLCI_SAPI_OFFSET, DLCI_SAPI_LENGTH, ENC_BIG_ENDIAN);
195 } else {
196 proto_tree_add_item(parameter_tree, hf_dlci_sapi, parameter_tvb, DLCI_SAPI_OFFSET, DLCI_SAPI_LENGTH, ENC_BIG_ENDIAN);
197 }
198 sapi_val = (tvb_get_guint8(parameter_tvb, DLCI_SAPI_OFFSET) & SAPI_MASK) >> SAPI_SHIFT;
199 sapi_val_assigned = TRUE;
200
201 proto_tree_add_item(parameter_tree, hf_dlci_one_bit, parameter_tvb, DLCI_TEI_OFFSET, DLCI_TEI_LENGTH, ENC_BIG_ENDIAN);
202 proto_tree_add_item(parameter_tree, hf_dlci_tei, parameter_tvb, DLCI_TEI_OFFSET, DLCI_TEI_LENGTH, ENC_BIG_ENDIAN);
203 proto_tree_add_item(parameter_tree, hf_dlci_spare, parameter_tvb, DLCI_SPARE_OFFSET, DLCI_SPARE_LENGTH, ENC_BIG_ENDIAN);
204 }
205
206 static void
dissect_diagnostic_information_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)207 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
208 {
209 guint16 diag_info_length;
210
211 diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
212 proto_tree_add_item(parameter_tree, hf_diag_info, parameter_tvb, PARAMETER_VALUE_OFFSET, diag_info_length, ENC_NA);
213 proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
214 }
215
216 #define START_LENGTH 4
217 #define END_LENGTH 4
218 #define INTERVAL_LENGTH (START_LENGTH + END_LENGTH)
219
220 #define START_OFFSET 0
221 #define END_OFFSET (START_OFFSET + START_LENGTH)
222
223 static void
dissect_integer_range_interface_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)224 dissect_integer_range_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
225 {
226 guint16 number_of_ranges, range_number;
227 gint offset;
228
229 number_of_ranges = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) / INTERVAL_LENGTH;
230 offset = PARAMETER_VALUE_OFFSET;
231 proto_item_append_text(parameter_item, " (");
232 for (range_number = 0; range_number < number_of_ranges; range_number++) {
233 proto_tree_add_item(parameter_tree, hf_interface_range_start, parameter_tvb, offset + START_OFFSET, START_LENGTH, ENC_BIG_ENDIAN);
234 proto_tree_add_item(parameter_tree, hf_interface_range_end, parameter_tvb, offset + END_OFFSET, END_LENGTH, ENC_BIG_ENDIAN);
235 proto_item_append_text(parameter_item, (range_number > 0) ? ", %d-%d" : "%d-%d",
236 tvb_get_ntohl(parameter_tvb, offset + START_OFFSET), tvb_get_ntohl(parameter_tvb, offset + END_OFFSET));
237 offset += INTERVAL_LENGTH;
238 }
239 proto_item_append_text(parameter_item, ")");
240 }
241
242 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
243
244 static void
dissect_heartbeat_data_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)245 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
246 {
247 guint16 heartbeat_data_length;
248
249 heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
250 proto_tree_add_item(parameter_tree, hf_heartbeat_data, parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, ENC_NA);
251 proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
252 }
253
254 #define ASP_MGMT_REASON 1
255
256 static const value_string asp_reason_values[] = {
257 { ASP_MGMT_REASON, "Management inhibit" },
258 { 0, NULL } };
259
260 #define ASP_REASON_LENGTH 4
261 #define ASP_REASON_OFFSET PARAMETER_VALUE_OFFSET
262
263 static void
dissect_asp_reason_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)264 dissect_asp_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
265 {
266 proto_tree_add_item(parameter_tree, hf_asp_reason, parameter_tvb, ASP_REASON_OFFSET, ASP_REASON_LENGTH, ENC_BIG_ENDIAN);
267 proto_item_append_text(parameter_item, " (%s)", val_to_str_const(tvb_get_ntohl(parameter_tvb, ASP_REASON_OFFSET), asp_reason_values, "unknown"));
268 }
269
270 #define OVER_RIDE_TRAFFIC_MODE_TYPE 1
271 #define LOAD_SHARE_TRAFFIC_MODE_TYPE 2
272
273 static const value_string traffic_mode_type_values[] = {
274 { OVER_RIDE_TRAFFIC_MODE_TYPE, "Over-ride" },
275 { LOAD_SHARE_TRAFFIC_MODE_TYPE, "Load-share" },
276 { 0, NULL } };
277
278 #define TRAFFIC_MODE_TYPE_LENGTH 4
279 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
280
281 static void
dissect_traffic_mode_type_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)282 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
283 {
284 proto_tree_add_item(parameter_tree, hf_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, ENC_BIG_ENDIAN);
285 proto_item_append_text(parameter_item, " (%s)",
286 val_to_str_const(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), traffic_mode_type_values, "unknown"));
287 }
288
289 #define INVALID_VERSION_ERROR 0x01
290 #define INVALID_INTERFACE_IDENTIFIER_ERROR 0x02
291 #define UNSUPPORTED_MESSAGE_CLASS_ERROR 0x03
292 #define UNSUPPORTED_MESSAGE_TYPE_ERROR 0x04
293 #define UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR 0x05
294 #define UNEXPECTED_MESSAGE_ERROR 0x06
295 #define PROTOCOL_ERROR 0x07
296 #define UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR 0x08
297 #define INVALID_STREAM_IDENTIFIER_ERROR 0x09
298 #define UNASSIGNED_TEI_ERROR 0x0a
299 #define UNRECOGNIZED_SAPI_ERROR 0x0b
300 #define INVALID_TEI_SAPI_COMBINATION_ERROR 0x0c
301 #define REFUSED_MANAGEMENT_BLOCKING_ERROR 0x0d
302 #define ASP_IDENTIFIER_REQUIRED_ERROR 0x0e
303 #define INVALID_ASP_IDENTIFIER_ERROR 0x0f
304
305 static const value_string error_code_values[] = {
306 { INVALID_VERSION_ERROR, "Invalid version" },
307 { INVALID_INTERFACE_IDENTIFIER_ERROR, "Invalid interface identifier" },
308 { UNSUPPORTED_MESSAGE_CLASS_ERROR, "Unsupported message class" },
309 { UNSUPPORTED_MESSAGE_TYPE_ERROR, "Unsupported message type" },
310 { UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR, "Unsupported traffic handling mode" },
311 { UNEXPECTED_MESSAGE_ERROR, "Unexpected message" },
312 { PROTOCOL_ERROR, "Protocol error" },
313 { UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR, "Unsupported interface identifier type" },
314 { INVALID_STREAM_IDENTIFIER_ERROR, "Invalid stream identifier" },
315 { UNASSIGNED_TEI_ERROR, "Unassigned TEI" },
316 { UNRECOGNIZED_SAPI_ERROR, "Unrecognized SAPI" },
317 { INVALID_TEI_SAPI_COMBINATION_ERROR, "Invalid TEI/SAPI combination" },
318 { 0, NULL } };
319
320 static const value_string error_code_ig_values[] = {
321 { INVALID_VERSION_ERROR, "Invalid version" },
322 { INVALID_INTERFACE_IDENTIFIER_ERROR, "Invalid interface identifier" },
323 { UNSUPPORTED_MESSAGE_CLASS_ERROR, "Unsupported message class" },
324 { UNSUPPORTED_MESSAGE_TYPE_ERROR, "Unsupported message type" },
325 { UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR, "Unsupported traffic handling mode" },
326 { UNEXPECTED_MESSAGE_ERROR, "Unexpected message" },
327 { PROTOCOL_ERROR, "Protocol error" },
328 { UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR, "Unsupported interface identifier type" },
329 { INVALID_STREAM_IDENTIFIER_ERROR, "Invalid stream identifier" },
330 { UNASSIGNED_TEI_ERROR, "Unassigned TEI" },
331 { UNRECOGNIZED_SAPI_ERROR, "Unrecognized SAPI" },
332 { INVALID_TEI_SAPI_COMBINATION_ERROR, "Invalid TEI/SAPI combination" },
333 { REFUSED_MANAGEMENT_BLOCKING_ERROR, "Refused - Management blocking" },
334 { ASP_IDENTIFIER_REQUIRED_ERROR, "ASP identifier required" },
335 { INVALID_ASP_IDENTIFIER_ERROR, "Invalid ASP identifier" },
336 { 0, NULL } };
337
338 #define ERROR_CODE_LENGTH 4
339 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
340
341 static void
dissect_error_code_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)342 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
343 {
344 proto_tree_add_item(parameter_tree, support_IG?hf_error_code_ig:hf_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, ENC_BIG_ENDIAN);
345 proto_item_append_text(parameter_item, " (%s)",
346 val_to_str_const(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), support_IG?error_code_ig_values:error_code_values, "unknown"));
347 }
348
349 #define ASP_STATE_CHANGE_STATUS_TYPE 0x01
350 #define OTHER_STATUS_TYPE 0x02
351
352 static const value_string status_type_values[] = {
353 { ASP_STATE_CHANGE_STATUS_TYPE, "Application server state change" },
354 { OTHER_STATUS_TYPE, "Other" },
355 { 0, NULL } };
356
357 #define AS_DOWN_STATUS_IDENT 0x01
358 #define AS_INACTIVE_STATUS_IDENT 0x02
359 #define AS_ACTIVE_STATUS_IDENT 0x03
360 #define AS_PENDING_STATUS_IDENT 0x04
361
362 #define INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT 0x01
363 #define ALTERNATE_ASP_ACTIVE_STATUS_IDENT 0x02
364
365 static const value_string status_type_id_values[] = {
366 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_DOWN_STATUS_IDENT, "Application server down" },
367 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_INACTIVE_STATUS_IDENT, "Application server inactive" },
368 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_ACTIVE_STATUS_IDENT, "Application server active" },
369 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_PENDING_STATUS_IDENT, "Application server pending" },
370 { OTHER_STATUS_TYPE * 256 * 256 + INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT, "Insufficient ASP resources active in AS" },
371 { OTHER_STATUS_TYPE * 256 * 256 + ALTERNATE_ASP_ACTIVE_STATUS_IDENT, "Alternate ASP active" },
372 { 0, NULL } };
373
374 static const value_string status_type_id_ig_values[] = {
375 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_INACTIVE_STATUS_IDENT, "Application server inactive" },
376 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_ACTIVE_STATUS_IDENT, "Application server active" },
377 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_PENDING_STATUS_IDENT, "Application server pending" },
378 { OTHER_STATUS_TYPE * 256 * 256 + INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT, "Insufficient ASP resources active in AS" },
379 { OTHER_STATUS_TYPE * 256 * 256 + ALTERNATE_ASP_ACTIVE_STATUS_IDENT, "Alternate ASP active" },
380 { 0, NULL } };
381
382 #define STATUS_TYPE_LENGTH 2
383 #define STATUS_IDENT_LENGTH 2
384 #define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
385 #define STATUS_IDENT_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
386
387 static void
dissect_status_type_identification_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)388 dissect_status_type_identification_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
389 {
390 guint16 status_type, status_id;
391
392 status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
393 status_id = tvb_get_ntohs(parameter_tvb, STATUS_IDENT_OFFSET);
394
395 proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, ENC_BIG_ENDIAN);
396 proto_tree_add_uint_format_value(parameter_tree, hf_status_id, parameter_tvb, STATUS_IDENT_OFFSET, STATUS_IDENT_LENGTH,
397 status_id, "%u (%s)", status_id,
398 val_to_str_const(status_type * 256 * 256 + status_id, support_IG?status_type_id_ig_values:status_type_id_values, "unknown"));
399
400 proto_item_append_text(parameter_item, " (%s)",
401 val_to_str_const(status_type * 256 * 256 + status_id, support_IG?status_type_id_ig_values:status_type_id_values, "unknown status information"));
402 }
403
404 #define PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
405
406 static void
dissect_protocol_data_parameter(tvbuff_t * parameter_tvb,proto_item * parameter_item,packet_info * pinfo,proto_tree * tree)407 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, proto_item *parameter_item, packet_info *pinfo, proto_tree *tree)
408 {
409 guint16 protocol_data_length;
410 tvbuff_t *protocol_data_tvb;
411
412 protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
413 protocol_data_tvb = tvb_new_subset_length(parameter_tvb, PROTOCOL_DATA_OFFSET, protocol_data_length);
414 proto_item_append_text(parameter_item, " (%u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
415
416 if(sapi_val_assigned == FALSE)
417 {
418 return;
419 }
420 if(global_iua_gsm_sapis) {
421 if (!dissector_try_uint(lapd_gsm_sapi_dissector_table, sapi_val, protocol_data_tvb, pinfo, tree))
422 call_data_dissector(protocol_data_tvb, pinfo, tree);
423 return;
424 }
425
426 switch(sapi_val)
427 {
428 case SAPI_VAL_CALL_CONTROL:
429 case SAPI_VAL_Q931_PACKET:
430 call_dissector(q931_handle, protocol_data_tvb, pinfo, tree);
431 break;
432
433 case SAPI_VAL_X25:
434 call_dissector(x25_handle, protocol_data_tvb, pinfo, tree);
435 break;
436
437 default:
438 break;
439 }
440 }
441
442 #define RELEASE_MGMT_REASON 0
443 #define RELEASE_PHYS_REASON 1
444 #define RELEASE_DM_REASON 2
445 #define RELEASE_OTHER_REASON 3
446
447 static const value_string release_reason_values[] = {
448 { RELEASE_MGMT_REASON, "Management layer generated release" },
449 { RELEASE_PHYS_REASON, "Physical layer alarm generated release" },
450 { RELEASE_DM_REASON, "Layer 2 should release" },
451 { RELEASE_OTHER_REASON, "Other reason" },
452 { 0, NULL } };
453
454 #define RELEASE_REASON_OFFSET PARAMETER_VALUE_OFFSET
455 #define RELEASE_REASON_LENGTH 4
456
457 static void
dissect_release_reason_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)458 dissect_release_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
459 {
460 proto_tree_add_item(parameter_tree, hf_release_reason, parameter_tvb, RELEASE_REASON_OFFSET, RELEASE_REASON_LENGTH, ENC_BIG_ENDIAN);
461 proto_item_append_text(parameter_item, " (%s)",
462 val_to_str_const(tvb_get_ntohl(parameter_tvb, RELEASE_REASON_OFFSET), release_reason_values, "unknown"));
463 }
464
465 #define TEI_STATUS_ASSIGNED 0
466 #define TEI_STATUS_UNASSIGNED 1
467
468 static const value_string tei_status_values[] = {
469 { TEI_STATUS_ASSIGNED, "TEI is considered assigned by Q.921" },
470 { TEI_STATUS_UNASSIGNED, "TEI is considered unassigned by Q.921" },
471 { 0, NULL } };
472
473 #define TEI_STATUS_LENGTH 4
474 #define TEI_STATUS_OFFSET PARAMETER_VALUE_OFFSET
475
476 static void
dissect_tei_status_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)477 dissect_tei_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
478 {
479 proto_tree_add_item(parameter_tree, hf_tei_status, parameter_tvb, TEI_STATUS_OFFSET, TEI_STATUS_LENGTH, ENC_BIG_ENDIAN);
480 proto_item_append_text(parameter_item, " (%s)",
481 val_to_str_const(tvb_get_ntohl(parameter_tvb, TEI_STATUS_OFFSET), tei_status_values, "unknown"));
482 }
483
484 #define ASP_ID_LENGTH 4
485 #define ASP_ID_OFFSET PARAMETER_VALUE_OFFSET
486
487 static void
dissect_asp_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)488 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
489 {
490 proto_tree_add_item(parameter_tree, hf_asp_id, parameter_tvb, ASP_ID_OFFSET, ASP_ID_LENGTH, ENC_BIG_ENDIAN);
491 proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_ID_OFFSET));
492 }
493
494 static void
dissect_unknown_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)495 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
496 {
497 guint16 parameter_value_length;
498
499 parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
500 if (parameter_value_length > 0)
501 proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
502 proto_item_append_text(parameter_item, " with tag %u and %u byte%s value",
503 tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET), parameter_value_length, plurality(parameter_value_length, "", "s"));
504 }
505
506 #define INT_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x01
507 #define TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x03
508 #define INFO_PARAMETER_TAG 0x04
509 #define DLCI_PARAMETER_TAG 0x05
510 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG 0x07
511 #define INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x08
512 #define HEARTBEAT_DATA_PARAMETER_TAG 0x09
513 #define ASP_REASON_PARAMETER_TAG 0x0a
514 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG 0x0b
515 #define ERROR_CODE_PARAMETER_TAG 0x0c
516 #define STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG 0x0d
517 #define PROTOCOL_DATA_PARAMETER_TAG 0x0e
518 #define RELEASE_REASON_PARAMETER_TAG 0x0f
519 #define TEI_STATUS_PARAMETER_TAG 0x10
520 #define ASP_IDENTIFIER_PARAMETER_TAG 0x11
521
522 static const value_string parameter_tag_values[] = {
523 { INT_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Integer interface identifier" },
524 { TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Text interface identifier" },
525 { INFO_PARAMETER_TAG, "Info" },
526 { DLCI_PARAMETER_TAG, "DLCI" },
527 { DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
528 { INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Integer range interface identifier" },
529 { HEARTBEAT_DATA_PARAMETER_TAG, "Heartbeat data" },
530 { ASP_REASON_PARAMETER_TAG, "Reason" },
531 { TRAFFIC_MODE_TYPE_PARAMETER_TAG, "Traffic mode type" },
532 { ERROR_CODE_PARAMETER_TAG, "Error code" },
533 { STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG, "Status type/identification" },
534 { PROTOCOL_DATA_PARAMETER_TAG, "Protocol data" },
535 { RELEASE_REASON_PARAMETER_TAG, "Reason" },
536 { TEI_STATUS_PARAMETER_TAG, "TEI status" },
537 { 0, NULL } };
538
539 static const value_string parameter_tag_ig_values[] = {
540 { INT_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Integer interface identifier" },
541 { TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Text interface identifier" },
542 { INFO_PARAMETER_TAG, "Info" },
543 { DLCI_PARAMETER_TAG, "DLCI" },
544 { DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
545 { INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Integer range interface identifier" },
546 { HEARTBEAT_DATA_PARAMETER_TAG, "Heartbeat data" },
547 { TRAFFIC_MODE_TYPE_PARAMETER_TAG, "Traffic mode type" },
548 { ERROR_CODE_PARAMETER_TAG, "Error code" },
549 { STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG, "Status type/identification" },
550 { PROTOCOL_DATA_PARAMETER_TAG, "Protocol data" },
551 { RELEASE_REASON_PARAMETER_TAG, "Reason" },
552 { TEI_STATUS_PARAMETER_TAG, "TEI status" },
553 { ASP_IDENTIFIER_PARAMETER_TAG, "ASP identifier"},
554 { 0, NULL } };
555
556 static void
dissect_parameter(tvbuff_t * parameter_tvb,packet_info * pinfo,proto_tree * tree,proto_tree * iua_tree)557 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *iua_tree)
558 {
559 guint16 tag, length, padding_length;
560 proto_item *parameter_item;
561 proto_tree *parameter_tree;
562
563 /* extract tag and length from the parameter */
564 tag = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
565 length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
566 padding_length = tvb_reported_length(parameter_tvb) - length;
567
568 /* create proto_tree stuff */
569 parameter_tree = proto_tree_add_subtree_format(iua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, -1, ett_iua_parameter, ¶meter_item,
570 "%s parameter", val_to_str_const(tag, support_IG?parameter_tag_ig_values:parameter_tag_values, "Unknown"));
571
572 /* add tag and length to the iua tree */
573 proto_tree_add_item(parameter_tree, support_IG?hf_parameter_tag_ig:hf_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET, PARAMETER_TAG_LENGTH, ENC_BIG_ENDIAN);
574 proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, ENC_BIG_ENDIAN);
575
576 switch(tag) {
577 case INT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
578 dissect_int_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
579 break;
580 case TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
581 dissect_text_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
582 break;
583 case INFO_PARAMETER_TAG:
584 dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
585 break;
586 case DLCI_PARAMETER_TAG:
587 dissect_dlci_parameter(parameter_tvb, parameter_tree);
588 break;
589 case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
590 dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
591 break;
592 case INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG:
593 dissect_integer_range_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
594 break;
595 case HEARTBEAT_DATA_PARAMETER_TAG:
596 dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
597 break;
598 case ASP_REASON_PARAMETER_TAG:
599 if (support_IG)
600 dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
601 else
602 dissect_asp_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
603 break;
604 case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
605 dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
606 break;
607 case ERROR_CODE_PARAMETER_TAG:
608 dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
609 break;
610 case STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG:
611 dissect_status_type_identification_parameter(parameter_tvb, parameter_tree, parameter_item);
612 break;
613 case PROTOCOL_DATA_PARAMETER_TAG:
614 dissect_protocol_data_parameter(parameter_tvb, parameter_item, pinfo, tree);
615 break;
616 case RELEASE_REASON_PARAMETER_TAG:
617 dissect_release_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
618 break;
619 case TEI_STATUS_PARAMETER_TAG:
620 dissect_tei_status_parameter(parameter_tvb, parameter_tree, parameter_item);
621 break;
622 case ASP_IDENTIFIER_PARAMETER_TAG:
623 if (support_IG)
624 dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
625 else
626 dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
627 break;
628 default:
629 dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
630 break;
631 };
632
633 if (padding_length > 0)
634 proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, ENC_NA);
635 }
636
637 static void
dissect_parameters(tvbuff_t * parameters_tvb,packet_info * pinfo,proto_tree * tree,proto_tree * iua_tree)638 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *iua_tree)
639 {
640 gint offset, length, total_length, remaining_length;
641 tvbuff_t *parameter_tvb;
642
643 offset = 0;
644 while((remaining_length = tvb_reported_length_remaining(parameters_tvb, offset))) {
645 length = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
646 total_length = ADD_PADDING(length);
647 if (remaining_length >= length)
648 total_length = MIN(total_length, remaining_length);
649 /* create a tvb for the parameter including the padding bytes */
650 parameter_tvb = tvb_new_subset_length(parameters_tvb, offset, total_length);
651 dissect_parameter(parameter_tvb, pinfo, tree, iua_tree);
652 /* get rid of the handled parameter */
653 offset += total_length;
654 }
655 }
656
657 #define VERSION_LENGTH 1
658 #define RESERVED_LENGTH 1
659 #define MESSAGE_CLASS_LENGTH 1
660 #define MESSAGE_TYPE_LENGTH 1
661 #define MESSAGE_LENGTH_LENGTH 4
662 #define COMMON_HEADER_LENGTH (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
663 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
664
665 #define COMMON_HEADER_OFFSET 0
666 #define VERSION_OFFSET COMMON_HEADER_OFFSET
667 #define RESERVED_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
668 #define MESSAGE_CLASS_OFFSET (RESERVED_OFFSET + RESERVED_LENGTH)
669 #define MESSAGE_TYPE_OFFSET (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
670 #define MESSAGE_LENGTH_OFFSET (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
671 #define PARAMETERS_OFFSET (COMMON_HEADER_OFFSET + COMMON_HEADER_LENGTH)
672
673 #define PROTOCOL_VERSION_RELEASE_1 1
674
675 static const value_string protocol_version_values[] = {
676 { PROTOCOL_VERSION_RELEASE_1, "Release 1" },
677 { 0, NULL } };
678
679 #define MESSAGE_CLASS_MGMT_MESSAGE 0
680 #define MESSAGE_CLASS_TFER_MESSAGE 1
681 #define MESSAGE_CLASS_SSNM_MESSAGE 2
682 #define MESSAGE_CLASS_ASPSM_MESSAGE 3
683 #define MESSAGE_CLASS_ASPTM_MESSAGE 4
684 #define MESSAGE_CLASS_QPTM_MESSAGE 5
685 #define MESSAGE_CLASS_MAUP_MESSAGE 6
686 #define MESSAGE_CLASS_CL_SUA_MESSAGE 7
687 #define MESSAGE_CLASS_CO_SUA_MESSAGE 8
688
689 static const value_string message_class_values[] = {
690 { MESSAGE_CLASS_MGMT_MESSAGE, "Management messages" },
691 { MESSAGE_CLASS_TFER_MESSAGE, "Transfer messages" },
692 { MESSAGE_CLASS_SSNM_MESSAGE, "SS7 signalling network management messages" },
693 { MESSAGE_CLASS_ASPSM_MESSAGE, "ASP state maintenance messages" },
694 { MESSAGE_CLASS_ASPTM_MESSAGE, "ASP traffic maintenance messages" },
695 { MESSAGE_CLASS_QPTM_MESSAGE, "Q.921/Q.931 boundary primitive transport messages" },
696 { MESSAGE_CLASS_MAUP_MESSAGE, "MTP2 user adaptation messages" },
697 { MESSAGE_CLASS_CL_SUA_MESSAGE, "Connectionless messages (SUA)" },
698 { MESSAGE_CLASS_CO_SUA_MESSAGE, "Connection-oriented messages (SUA)" },
699 { 0, NULL } };
700
701 /* message types for MGMT messages */
702 #define MESSAGE_TYPE_ERR 0
703 #define MESSAGE_TYPE_NTFY 1
704 #define MESSAGE_TYPE_TEI_STATUS_REQ 2
705 #define MESSAGE_TYPE_TEI_STATUS_CON 3
706 #define MESSAGE_TYPE_TEI_STATUS_IND 4
707 #define MESSAGE_TYPE_TEI_QUERY_REQ 5
708
709 /* message types for ASPSM messages */
710 #define MESSAGE_TYPE_UP 1
711 #define MESSAGE_TYPE_DOWN 2
712 #define MESSAGE_TYPE_BEAT 3
713 #define MESSAGE_TYPE_UP_ACK 4
714 #define MESSAGE_TYPE_DOWN_ACK 5
715 #define MESSAGE_TYPE_BEAT_ACK 6
716
717 /* message types for ASPTM messages */
718 #define MESSAGE_TYPE_ACTIVE 1
719 #define MESSAGE_TYPE_INACTIVE 2
720 #define MESSAGE_TYPE_ACTIVE_ACK 3
721 #define MESSAGE_TYPE_INACTIVE_ACK 4
722
723 /* message types for QPTM messages */
724 #define MESSAGE_TYPE_DATA_REQUEST 1
725 #define MESSAGE_TYPE_DATA_INDICATION 2
726 #define MESSAGE_TYPE_UNIT_DATA_REQUEST 3
727 #define MESSAGE_TYPE_UNIT_DATA_INDICATION 4
728 #define MESSAGE_TYPE_ESTABLISH_REQUEST 5
729 #define MESSAGE_TYPE_ESTABLISH_CONFIRM 6
730 #define MESSAGE_TYPE_ESTABLISH_INDICATION 7
731 #define MESSAGE_TYPE_RELEASE_REQUEST 8
732 #define MESSAGE_TYPE_RELEASE_CONFIRM 9
733 #define MESSAGE_TYPE_RELEASE_INDICATION 10
734
735
736 static const value_string message_class_type_values[] = {
737 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "Error" },
738 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "Notify" },
739 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_REQ, "TEI status request" },
740 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_CON, "TEI status confirmation" },
741 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_IND, "TEI status indication" },
742 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP up" },
743 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP down" },
744 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "Heartbeat" },
745 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP up ack" },
746 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP down ack" },
747 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "Heartbeat ack" },
748 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP active" },
749 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP inactive" },
750 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP active ack" },
751 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack" },
752 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_REQUEST, "Data request" },
753 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_INDICATION, "Data indication" },
754 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST, "Unit data request" },
755 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "Unit data indication" },
756 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST, "Establish request" },
757 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM, "Establish confirmation" },
758 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "Establish indication" },
759 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_REQUEST, "Release request" },
760 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_CONFIRM, "Release confirmation" },
761 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_INDICATION, "Release indication" },
762 { 0, NULL } };
763
764 static const value_string message_class_type_ig_values[] = {
765 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "Error" },
766 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "Notify" },
767 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_REQ, "TEI status request" },
768 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_CON, "TEI status confirmation" },
769 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_IND, "TEI status indication" },
770 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_QUERY_REQ, "TEI query request" },
771 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP up" },
772 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP down" },
773 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "Heartbeat" },
774 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP up ack" },
775 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP down ack" },
776 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "Heartbeat ack" },
777 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP active" },
778 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP inactive" },
779 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP active ack" },
780 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack" },
781 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_REQUEST, "Data request" },
782 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_INDICATION, "Data indication" },
783 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST, "Unit data request" },
784 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "Unit data indication" },
785 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST, "Establish request" },
786 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM, "Establish confirmation" },
787 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "Establish indication" },
788 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_REQUEST, "Release request" },
789 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_CONFIRM, "Release confirmation" },
790 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_INDICATION, "Release indication" },
791 { 0, NULL } };
792
793 static const value_string message_class_type_acro_values[] = {
794 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "ERR" },
795 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "NTFY" },
796 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_REQ, "TEI_STAT_REQ" },
797 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_CON, "TEI_STAT_CON" },
798 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_IND, "TEI_STAT_IND" },
799 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP_UP" },
800 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP_DOWN" },
801 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "BEAT" },
802 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP_UP_ACK" },
803 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP_DOWN_ACK" },
804 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "BEAT_ACK" },
805 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP_ACTIVE" },
806 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP_INACTIVE" },
807 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP_ACTIVE_ACK" },
808 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
809 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_REQUEST, "DATA_REQ" },
810 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_INDICATION, "DATA_IND" },
811 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST, "U_DATA_REQ" },
812 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "U_DATA_IND" },
813 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST, "EST_REQ" },
814 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM, "EST_CON" },
815 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "EST_IND" },
816 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_REQUEST, "REL_REQ" },
817 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_CONFIRM, "REL_CON" },
818 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_INDICATION, "REL_IND" },
819 { 0, NULL } };
820
821 static const value_string message_class_type_acro_ig_values[] = {
822 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "ERR" },
823 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "NTFY" },
824 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_REQ, "TEI_STAT_REQ" },
825 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_CON, "TEI_STAT_CON" },
826 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_STATUS_IND, "TEI_STAT_IND" },
827 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_TEI_QUERY_REQ, "TEI_QUERY_REQ" },
828 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP_UP" },
829 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP_DOWN" },
830 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "BEAT" },
831 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP_UP_ACK" },
832 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP_DOWN_ACK" },
833 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "BEAT_ACK" },
834 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP_ACTIVE" },
835 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP_INACTIVE" },
836 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP_ACTIVE_ACK" },
837 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
838 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_REQUEST, "DATA_REQ" },
839 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_INDICATION, "DATA_IND" },
840 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST, "U_DATA_REQ" },
841 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "U_DATA_IND" },
842 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST, "EST_REQ" },
843 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM, "EST_CON" },
844 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "EST_IND" },
845 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_REQUEST, "REL_REQ" },
846 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_CONFIRM, "REL_CON" },
847 { MESSAGE_CLASS_QPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_INDICATION, "REL_IND" },
848 { 0, NULL } };
849
850 static void
dissect_common_header(tvbuff_t * common_header_tvb,packet_info * pinfo,proto_tree * iua_tree)851 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *iua_tree)
852 {
853 guint8 message_class, message_type;
854
855 message_class = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
856 message_type = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
857
858 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_class * 256 + message_type, support_IG?message_class_type_acro_ig_values:message_class_type_acro_values, "UNKNOWN"));
859
860 if (iua_tree) {
861 /* add the components of the common header to the protocol tree */
862 proto_tree_add_item(iua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
863 proto_tree_add_item(iua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, ENC_BIG_ENDIAN);
864 proto_tree_add_item(iua_tree, hf_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, ENC_BIG_ENDIAN);
865 proto_tree_add_uint_format_value(iua_tree, hf_message_type,
866 common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH,
867 message_type, "%u (%s)",
868 message_type, val_to_str_const(message_class * 256 + message_type, support_IG?message_class_type_ig_values:message_class_type_values, "reserved"));
869 proto_tree_add_item(iua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
870 }
871 }
872
873 static void
dissect_iua_message(tvbuff_t * message_tvb,packet_info * pinfo,proto_tree * tree,proto_tree * iua_tree)874 dissect_iua_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *iua_tree)
875 {
876 tvbuff_t *common_header_tvb, *parameters_tvb;
877
878 sapi_val_assigned = FALSE;
879
880 common_header_tvb = tvb_new_subset_length(message_tvb, COMMON_HEADER_OFFSET, COMMON_HEADER_LENGTH);
881 parameters_tvb = tvb_new_subset_remaining(message_tvb, PARAMETERS_OFFSET);
882 dissect_common_header(common_header_tvb, pinfo, iua_tree);
883 dissect_parameters(parameters_tvb, pinfo, tree, iua_tree);
884 }
885
886 static int
dissect_iua(tvbuff_t * message_tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)887 dissect_iua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
888 {
889 proto_item *iua_item;
890 proto_tree *iua_tree;
891
892 /* make entry in the Protocol column on summary display */
893
894 col_set_str(pinfo->cinfo, COL_PROTOCOL, support_IG?"IUA (RFC 3057 + IG)":"IUA (RFC 3057)");
895
896 /* create the m3ua protocol tree */
897 iua_item = proto_tree_add_item(tree, proto_iua, message_tvb, 0, -1, ENC_NA);
898 iua_tree = proto_item_add_subtree(iua_item, ett_iua);
899
900 /* dissect the message */
901 dissect_iua_message(message_tvb, pinfo, tree, iua_tree);
902 return tvb_captured_length(message_tvb);
903 }
904
905 /* Register the protocol with Wireshark */
906 void
proto_register_iua(void)907 proto_register_iua(void)
908 {
909
910 /* Setup list of header fields */
911 static hf_register_info hf[] = {
912 { &hf_int_interface_id, { "Integer interface identifier", "iua.int_interface_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
913 { &hf_text_interface_id, { "Text interface identifier", "iua.text_interface_identifier", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
914 { &hf_info_string, { "Info string", "iua.info_string", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL } },
915 { &hf_dlci_zero_bit, { "Zero bit", "iua.dlci_zero_bit", FT_BOOLEAN, 8, NULL, ZERO_BIT_MASK, NULL, HFILL } },
916 { &hf_dlci_spare_bit, { "Spare bit", "iua.dlci_spare_bit", FT_BOOLEAN, 8, NULL, SPARE_BIT_MASK, NULL, HFILL } },
917 { &hf_dlci_sapi, { "SAPI", "iua.dlci_sapi", FT_UINT8, BASE_HEX, VALS(sapi_values), SAPI_MASK, NULL, HFILL } },
918 { &hf_dlci_gsm_sapi, { "SAPI", "iua.dlci_gsm_sapi", FT_UINT8, BASE_HEX, VALS(gsm_sapi_vals), SAPI_MASK, NULL, HFILL } },
919 { &hf_dlci_one_bit, { "One bit", "iua.dlci_one_bit", FT_BOOLEAN, 8, NULL, ONE_BIT_MASK, NULL, HFILL } },
920 { &hf_dlci_tei, { "TEI", "iua.dlci_tei", FT_UINT8, BASE_HEX, NULL, TEI_MASK, NULL, HFILL } },
921 { &hf_dlci_spare, { "Spare", "iua.dlci_spare", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } },
922 { &hf_diag_info, { "Diagnostic information", "iua.diagnostic_information", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
923 { &hf_interface_range_start, { "Start", "iua.interface_range_start", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
924 { &hf_interface_range_end, { "End", "iua.interface_range_end", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
925 { &hf_heartbeat_data, { "Heartbeat data", "iua.heartbeat_data", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
926 { &hf_asp_reason, { "Reason", "iua.asp_reason", FT_UINT32, BASE_HEX, VALS(asp_reason_values), 0x0, NULL, HFILL } },
927 { &hf_traffic_mode_type, { "Traffic mode type", "iua.traffic_mode_type", FT_UINT32, BASE_HEX, VALS(traffic_mode_type_values), 0x0, NULL, HFILL } },
928 { &hf_error_code, { "Error code", "iua.error_code", FT_UINT32, BASE_DEC, VALS(error_code_values), 0x0, NULL, HFILL } },
929 { &hf_error_code_ig, { "Error code", "iua.error_code", FT_UINT32, BASE_DEC, VALS(error_code_ig_values), 0x0, NULL, HFILL } },
930 { &hf_status_type, { "Status type", "iua.status_type", FT_UINT16, BASE_DEC, VALS(status_type_values), 0x0, NULL, HFILL } },
931 { &hf_status_id, { "Status identification", "iua.status_identification", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
932 { &hf_release_reason, { "Reason", "iua.release_reason", FT_UINT32, BASE_HEX, VALS(release_reason_values), 0x0, NULL, HFILL } },
933 { &hf_tei_status, { "TEI status", "iua.tei_status", FT_UINT32, BASE_HEX, VALS(tei_status_values), 0x0, NULL, HFILL } },
934 { &hf_asp_id, { "ASP identifier", "iua.asp_identifier", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL } },
935 { &hf_parameter_tag, { "Parameter Tag", "iua.parameter_tag", FT_UINT16, BASE_DEC, VALS(parameter_tag_values), 0x0, NULL, HFILL } },
936 { &hf_parameter_tag_ig, { "Parameter Tag", "iua.parameter_tag", FT_UINT16, BASE_DEC, VALS(parameter_tag_ig_values), 0x0, NULL, HFILL } },
937 { &hf_parameter_length, { "Parameter length", "iua.parameter_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } },
938 { &hf_parameter_value, { "Parameter value", "iua.parameter_value", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
939 { &hf_parameter_padding, { "Parameter padding", "iua.parameter_padding", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } },
940 { &hf_version, { "Version", "iua.version", FT_UINT8, BASE_DEC, VALS(protocol_version_values), 0x0, NULL, HFILL } },
941 { &hf_reserved, { "Reserved", "iua.reserved", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL } },
942 { &hf_message_class, { "Message class", "iua.message_class", FT_UINT8, BASE_DEC, VALS(message_class_values), 0x0, NULL, HFILL } },
943 { &hf_message_type, { "Message Type", "iua.message_type", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } },
944 { &hf_message_length, { "Message length", "iua.message_length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } },
945 };
946 /* Setup protocol subtree array */
947 static gint *ett[] = {
948 &ett_iua,
949 &ett_iua_parameter,
950 };
951
952 /* Register the protocol name and description */
953 proto_iua = proto_register_protocol("ISDN Q.921-User Adaptation Layer", "IUA", "iua");
954 iua_module = prefs_register_protocol(proto_iua, NULL);
955
956 /* Required function calls to register the header fields and subtrees used */
957 proto_register_field_array(proto_iua, hf, array_length(hf));
958 proto_register_subtree_array(ett, array_length(ett));
959 prefs_register_bool_preference(iua_module, "support_ig", "Support Implementers Guide", "Support Implementers Guide (version 01)", &support_IG);
960
961 prefs_register_bool_preference(iua_module, "use_gsm_sapi_values",
962 "Use GSM SAPI values",
963 "Use SAPI values as specified in TS 48 056",
964 &global_iua_gsm_sapis);
965
966 /* Allow other dissectors to find this one by name. */
967 iua_handle = register_dissector("iua", dissect_iua, proto_iua);
968 }
969
970 #define SCTP_PORT_IUA 9900
971
972 void
proto_reg_handoff_iua(void)973 proto_reg_handoff_iua(void)
974 {
975 q931_handle = find_dissector_add_dependency("q931", proto_iua);
976 x25_handle = find_dissector_add_dependency("x.25", proto_iua);
977
978 dissector_add_uint("sctp.port", SCTP_PORT_IUA, iua_handle);
979 dissector_add_uint("sctp.ppi", IUA_PAYLOAD_PROTOCOL_ID, iua_handle);
980
981 lapd_gsm_sapi_dissector_table = find_dissector_table("lapd.gsm.sapi");
982 }
983
984 /*
985 * Editor modelines - https://www.wireshark.org/tools/modelines.html
986 *
987 * Local Variables:
988 * c-basic-offset: 2
989 * tab-width: 8
990 * indent-tabs-mode: nil
991 * End:
992 *
993 * ex: set shiftwidth=2 tabstop=8 expandtab:
994 * :indentSize=2:tabSize=8:noTabs=true:
995 */
996