1 /* packet-dua.c
2 * Routines for DPNSS/DASS2-User Adaptation Layer dissection
3 *
4 * It is hopefully (needs testing) compliant to
5 * https://tools.ietf.org/html/draft-ietf-sigtran-dua-08
6 * https://tools.ietf.org/html/draft-ietf-sigtran-rfc3057bis-02
7 *
8 * To do: - provide better handling of length parameters
9 *
10 * Copyright 2005, Michael Tuexen <tuexen [AT] fh-muenster.de>
11 *
12 * Wireshark - Network traffic analyzer
13 * By Gerald Combs <gerald@wireshark.org>
14 * Copyright 1998 Gerald Combs
15 *
16 * Copied from packet-iua.c
17 *
18 * SPDX-License-Identifier: GPL-2.0-or-later
19 */
20
21 #include "config.h"
22
23 #include <epan/packet.h>
24 #include <epan/sctpppids.h>
25 #include <wsutil/str_util.h>
26
27 void proto_register_dua(void);
28 void proto_reg_handoff_dua(void);
29
30 /* Initialize the protocol and registered fields */
31 static int proto_dua = -1;
32 static int hf_int_interface_id = -1;
33 static int hf_text_interface_id = -1;
34 static int hf_info_string = -1;
35 static int hf_dlci_reserved = -1;
36 static int hf_dlci_v_bit = -1;
37 static int hf_dlci_zero_bit = -1;
38 static int hf_dlci_channel = -1;
39 static int hf_dlci_one_bit = -1;
40 static int hf_dlci_spare = -1;
41 static int hf_diag_info = -1;
42 static int hf_interface_range_start = -1;
43 static int hf_interface_range_end = -1;
44 static int hf_heartbeat_data = -1;
45 static int hf_traffic_mode_type = -1;
46 static int hf_error_code = -1;
47 static int hf_status_type = -1;
48 static int hf_status_id = -1;
49 static int hf_release_reason = -1;
50 static int hf_tei_status = -1;
51 static int hf_asp_id = -1;
52 static int hf_states = -1;
53 static int hf_parameter_tag = -1;
54 static int hf_parameter_length = -1;
55 static int hf_parameter_value = -1;
56 static int hf_parameter_padding = -1;
57 static int hf_version = -1;
58 static int hf_reserved = -1;
59 static int hf_message_class = -1;
60 static int hf_message_type = -1;
61 static int hf_message_length = -1;
62
63 /* Initialize the subtree pointers */
64 static gint ett_dua = -1;
65 static gint ett_dua_parameter = -1;
66
67 static dissector_handle_t dpnss_handle;
68 static dissector_handle_t dua_handle;
69
70 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
71
72 #define PARAMETER_TAG_LENGTH 2
73 #define PARAMETER_LENGTH_LENGTH 2
74 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
75
76 #define PARAMETER_TAG_OFFSET 0
77 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
78 #define PARAMETER_VALUE_OFFSET (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
79 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
80
81 #define INT_INTERFACE_ID_OFFSET PARAMETER_VALUE_OFFSET
82 #define INT_INTERFACE_ID_LENGTH 4
83
84 static void
dissect_int_interface_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)85 dissect_int_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
86 {
87 proto_tree_add_item(parameter_tree, hf_int_interface_id,
88 parameter_tvb, INT_INTERFACE_ID_OFFSET, INT_INTERFACE_ID_LENGTH, ENC_BIG_ENDIAN);
89 proto_item_append_text(parameter_item, " (%d)", tvb_get_ntohl(parameter_tvb, INT_INTERFACE_ID_OFFSET));
90 }
91
92 #define TEXT_INTERFACE_ID_OFFSET PARAMETER_VALUE_OFFSET
93
94 static void
dissect_text_interface_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)95 dissect_text_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
96 {
97 guint16 interface_id_length;
98
99 interface_id_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
100
101 proto_tree_add_item(parameter_tree, hf_text_interface_id,
102 parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length, ENC_ASCII|ENC_NA);
103 proto_item_append_text(parameter_item, " (%.*s)", interface_id_length,
104 tvb_format_text(wmem_packet_scope(), parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length));
105 }
106
107 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
108
109 static void
dissect_info_string_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)110 dissect_info_string_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
111 {
112 guint16 info_string_length;
113
114 info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
115 proto_tree_add_item(parameter_tree, hf_info_string,
116 parameter_tvb, INFO_STRING_OFFSET, info_string_length, ENC_ASCII|ENC_NA);
117 proto_item_append_text(parameter_item, " (%.*s)", info_string_length,
118 tvb_format_text(wmem_packet_scope(), parameter_tvb, INFO_STRING_OFFSET, info_string_length));
119 }
120
121 #define DLCI_LENGTH 2
122 #define SPARE_LENGTH 2
123
124 #define DLCI_OFFSET PARAMETER_VALUE_OFFSET
125 #define SPARE_OFFSET (DLCI_OFFSET + DLCI_LENGTH)
126
127 #define RESERVED_BIT_MASK 0xfe00
128 #define V_BIT_MASK 0x0100
129 #define ZERO_BIT_MASK 0x0080
130 #define CHANNEL_BIT_MASK 0x007e
131 #define ONE_BIT_MASK 0x0001
132
133 static void
dissect_dlci_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree)134 dissect_dlci_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
135 {
136 proto_tree_add_item(parameter_tree, hf_dlci_reserved, parameter_tvb, DLCI_OFFSET, DLCI_LENGTH, ENC_BIG_ENDIAN);
137 proto_tree_add_item(parameter_tree, hf_dlci_v_bit, parameter_tvb, DLCI_OFFSET, DLCI_LENGTH, ENC_BIG_ENDIAN);
138 proto_tree_add_item(parameter_tree, hf_dlci_zero_bit, parameter_tvb, DLCI_OFFSET, DLCI_LENGTH, ENC_BIG_ENDIAN);
139 proto_tree_add_item(parameter_tree, hf_dlci_channel, parameter_tvb, DLCI_OFFSET, DLCI_LENGTH, ENC_BIG_ENDIAN);
140 proto_tree_add_item(parameter_tree, hf_dlci_one_bit, parameter_tvb, DLCI_OFFSET, DLCI_LENGTH, ENC_BIG_ENDIAN);
141 proto_tree_add_item(parameter_tree, hf_dlci_spare, parameter_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
142 }
143
144 static void
dissect_diagnostic_information_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)145 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
146 {
147 guint16 diag_info_length;
148
149 diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
150 proto_tree_add_item(parameter_tree, hf_diag_info, parameter_tvb, PARAMETER_VALUE_OFFSET, diag_info_length, ENC_NA);
151 proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
152 }
153
154 #define START_LENGTH 4
155 #define END_LENGTH 4
156 #define INTERVAL_LENGTH (START_LENGTH + END_LENGTH)
157
158 #define START_OFFSET 0
159 #define END_OFFSET (START_OFFSET + START_LENGTH)
160
161 static void
dissect_integer_range_interface_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)162 dissect_integer_range_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
163 {
164 guint16 number_of_ranges, range_number;
165 gint offset;
166
167 number_of_ranges = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) / INTERVAL_LENGTH;
168 offset = PARAMETER_VALUE_OFFSET;
169 for(range_number = 0; range_number < number_of_ranges; range_number++) {
170 proto_tree_add_item(parameter_tree, hf_interface_range_start,
171 parameter_tvb, offset + START_OFFSET, START_LENGTH, ENC_BIG_ENDIAN);
172 proto_tree_add_item(parameter_tree, hf_interface_range_end,
173 parameter_tvb, offset + END_OFFSET, END_LENGTH, ENC_BIG_ENDIAN);
174 offset += INTERVAL_LENGTH;
175 };
176
177 proto_item_append_text(parameter_item, " (%u range%s)", number_of_ranges, plurality(number_of_ranges, "", "s"));
178 }
179
180 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
181
182 static void
dissect_heartbeat_data_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)183 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
184 {
185 guint16 heartbeat_data_length;
186
187 heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
188 proto_tree_add_item(parameter_tree, hf_heartbeat_data,
189 parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, ENC_NA);
190 proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
191 }
192
193 #define OVER_RIDE_TRAFFIC_MODE_TYPE 1
194 #define LOAD_SHARE_TRAFFIC_MODE_TYPE 2
195
196 static const value_string traffic_mode_type_values[] = {
197 { OVER_RIDE_TRAFFIC_MODE_TYPE, "Over-ride" },
198 { LOAD_SHARE_TRAFFIC_MODE_TYPE, "Load-share" },
199 { 0, NULL } };
200
201 #define TRAFFIC_MODE_TYPE_LENGTH 4
202 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
203
204 static void
dissect_traffic_mode_type_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)205 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
206 {
207 proto_tree_add_item(parameter_tree, hf_traffic_mode_type,
208 parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, ENC_BIG_ENDIAN);
209 proto_item_append_text(parameter_item, " (%s)",
210 val_to_str_const(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET),
211 traffic_mode_type_values, "unknown"));
212 }
213
214 #define INVALID_VERSION_ERROR 0x01
215 #define INVALID_INTERFACE_IDENTIFIER_ERROR 0x02
216 #define UNSUPPORTED_MESSAGE_CLASS_ERROR 0x03
217 #define UNSUPPORTED_MESSAGE_TYPE_ERROR 0x04
218 #define UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR 0x05
219 #define UNEXPECTED_MESSAGE_ERROR 0x06
220 #define PROTOCOL_ERROR 0x07
221 #define UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR 0x08
222 #define INVALID_STREAM_IDENTIFIER_ERROR 0x09
223 #define REFUSED_MANAGEMENT_BLOCKING_ERROR 0x0d
224 #define ASP_IDENTIFIER_REQUIRED_ERROR 0x0e
225 #define INVALID_ASP_IDENTIFIER_ERROR 0x0f
226 #define CHANNEL_NUMBER_OUT_OF_RANGE_ERROR 0x1c
227 #define CHANNEL_NUMBER_NOT_CONFIGURED 0x1d
228
229 static const value_string error_code_values[] = {
230 { INVALID_VERSION_ERROR, "Invalid version" },
231 { INVALID_INTERFACE_IDENTIFIER_ERROR, "Invalid interface identifier" },
232 { UNSUPPORTED_MESSAGE_CLASS_ERROR, "Unsupported message class" },
233 { UNSUPPORTED_MESSAGE_TYPE_ERROR, "Unsupported message type" },
234 { UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR, "Unsupported traffic handling mode" },
235 { UNEXPECTED_MESSAGE_ERROR, "Unexpected message" },
236 { PROTOCOL_ERROR, "Protocol error" },
237 { UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR, "Unsupported interface identifier type" },
238 { INVALID_STREAM_IDENTIFIER_ERROR, "Invalid stream identifier" },
239 { REFUSED_MANAGEMENT_BLOCKING_ERROR, "Refused - Management blocking" },
240 { ASP_IDENTIFIER_REQUIRED_ERROR, "ASP identifier required" },
241 { INVALID_ASP_IDENTIFIER_ERROR, "Invalid ASP Identifier" },
242 { CHANNEL_NUMBER_OUT_OF_RANGE_ERROR, "Channel number out of range" },
243 { CHANNEL_NUMBER_NOT_CONFIGURED, "Channel number not configured" },
244 { 0, NULL } };
245
246 #define ERROR_CODE_LENGTH 4
247 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
248
249 static void
dissect_error_code_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)250 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
251 {
252 proto_tree_add_item(parameter_tree, hf_error_code,
253 parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, ENC_BIG_ENDIAN);
254 proto_item_append_text(parameter_item, " (%s)",
255 val_to_str_const(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET),
256 error_code_values,
257 "unknown"));
258 }
259
260 #define ASP_STATE_CHANGE_STATUS_TYPE 0x01
261 #define OTHER_STATUS_TYPE 0x02
262
263 static const value_string status_type_values[] = {
264 { ASP_STATE_CHANGE_STATUS_TYPE, "Application server state change" },
265 { OTHER_STATUS_TYPE, "Other" },
266 { 0, NULL } };
267
268 #define AS_DOWN_STATUS_IDENT 0x01
269 #define AS_INACTIVE_STATUS_IDENT 0x02
270 #define AS_ACTIVE_STATUS_IDENT 0x03
271 #define AS_PENDING_STATUS_IDENT 0x04
272
273 #define INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT 0x01
274 #define ALTERNATE_ASP_ACTIVE_STATUS_IDENT 0x02
275
276 static const value_string status_type_id_values[] = {
277 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_DOWN_STATUS_IDENT, "Application server down" },
278 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_INACTIVE_STATUS_IDENT, "Application server inactive" },
279 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_ACTIVE_STATUS_IDENT, "Application server active" },
280 { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_PENDING_STATUS_IDENT, "Application server pending" },
281 { OTHER_STATUS_TYPE * 256 * 256 + INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT, "Insufficient ASP resources active in AS" },
282 { OTHER_STATUS_TYPE * 256 * 256 + ALTERNATE_ASP_ACTIVE_STATUS_IDENT, "Alternate ASP active" },
283 { 0, NULL } };
284
285 #define STATUS_TYPE_LENGTH 2
286 #define STATUS_IDENT_LENGTH 2
287 #define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
288 #define STATUS_IDENT_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
289
290 static void
dissect_status_type_identification_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)291 dissect_status_type_identification_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
292 {
293 guint16 status_type, status_id;
294
295 status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
296 status_id = tvb_get_ntohs(parameter_tvb, STATUS_IDENT_OFFSET);
297
298 proto_tree_add_item(parameter_tree, hf_status_type,
299 parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, ENC_BIG_ENDIAN);
300 proto_tree_add_uint_format_value(parameter_tree, hf_status_id, parameter_tvb, STATUS_IDENT_OFFSET, STATUS_IDENT_LENGTH,
301 status_id, "%u (%s)", status_id,
302 val_to_str_const(status_type * 256 * 256 + status_id, status_type_id_values, "unknown"));
303
304 proto_item_append_text(parameter_item, " (%s)",
305 val_to_str_const(status_type * 256 * 256 + status_id,
306 status_type_id_values,
307 "unknown status information"));
308 }
309
310 #define PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
311
312 static void
dissect_protocol_data_parameter(tvbuff_t * parameter_tvb,proto_item * parameter_item,packet_info * pinfo,proto_tree * tree)313 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, proto_item *parameter_item, packet_info *pinfo, proto_tree *tree)
314 {
315 guint16 protocol_data_length;
316 tvbuff_t *protocol_data_tvb;
317
318 protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
319 protocol_data_tvb = tvb_new_subset_length(parameter_tvb, PROTOCOL_DATA_OFFSET, protocol_data_length);
320 if(dpnss_handle){
321 call_dissector(dpnss_handle, protocol_data_tvb, pinfo, tree);
322 return;
323 }
324
325 call_data_dissector(protocol_data_tvb, pinfo, tree);
326
327 proto_item_append_text(parameter_item, " (%u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
328 }
329
330 #define RELEASE_MGMT_REASON 0
331 #define RELEASE_PHYS_REASON 1
332 #define RELEASE_DM_REASON 2
333 #define RELEASE_OTHER_REASON 3
334
335 static const value_string release_reason_values[] = {
336 { RELEASE_MGMT_REASON, "Management layer generated release" },
337 { RELEASE_PHYS_REASON, "Physical layer alarm generated release" },
338 { RELEASE_DM_REASON, "Layer 2 should release" },
339 { RELEASE_OTHER_REASON, "Other reason" },
340 { 0, NULL } };
341
342 #define RELEASE_REASON_OFFSET PARAMETER_VALUE_OFFSET
343 #define RELEASE_REASON_LENGTH 4
344
345 static void
dissect_release_reason_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)346 dissect_release_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
347 {
348 proto_tree_add_item(parameter_tree, hf_release_reason,
349 parameter_tvb, RELEASE_REASON_OFFSET, RELEASE_REASON_LENGTH, ENC_BIG_ENDIAN);
350 proto_item_append_text(parameter_item, " (%s)",
351 val_to_str_const(tvb_get_ntohl(parameter_tvb, RELEASE_REASON_OFFSET),
352 release_reason_values,
353 "unknown"));
354 }
355
356 #define TEI_STATUS_ASSIGNED 0
357 #define TEI_STATUS_UNASSIGNED 1
358
359 static const value_string tei_status_values[] = {
360 { TEI_STATUS_ASSIGNED, "TEI is considered assigned by Q.921" },
361 { TEI_STATUS_UNASSIGNED, "TEI is considered unassigned by Q.921" },
362 { 0, NULL } };
363
364 #define TEI_STATUS_LENGTH 4
365 #define TEI_STATUS_OFFSET PARAMETER_VALUE_OFFSET
366
367 static void
dissect_tei_status_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)368 dissect_tei_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
369 {
370 proto_tree_add_item(parameter_tree, hf_tei_status,
371 parameter_tvb, TEI_STATUS_OFFSET, TEI_STATUS_LENGTH, ENC_BIG_ENDIAN);
372 proto_item_append_text(parameter_item, " (%s)",
373 val_to_str_const(tvb_get_ntohl(parameter_tvb, TEI_STATUS_OFFSET),
374 tei_status_values,
375 "unknown"));
376 }
377
378 #define ASP_ID_LENGTH 4
379 #define ASP_ID_OFFSET PARAMETER_VALUE_OFFSET
380
381 static void
dissect_asp_identifier_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)382 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
383 {
384 proto_tree_add_item(parameter_tree, hf_asp_id, parameter_tvb, ASP_ID_OFFSET, ASP_ID_LENGTH, ENC_BIG_ENDIAN);
385 proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_ID_OFFSET));
386 }
387
388 static void
dissect_dlc_status_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item _U_)389 dissect_dlc_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item _U_)
390 {
391 guint16 parameter_value_length;
392
393 /* FIXME: This can be done better */
394 parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
395 if (parameter_value_length > 0)
396 proto_tree_add_item(parameter_tree,
397 hf_states, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
398 }
399
400 static void
dissect_unknown_parameter(tvbuff_t * parameter_tvb,proto_tree * parameter_tree,proto_item * parameter_item)401 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
402 {
403 guint16 parameter_value_length;
404
405 parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
406 if (parameter_value_length > 0)
407 proto_tree_add_item(parameter_tree, hf_parameter_value,
408 parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
409 proto_item_append_text(parameter_item, " with tag %u and %u byte%s value",
410 tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET),
411 parameter_value_length, plurality(parameter_value_length, "", "s"));
412 }
413
414 #define INT_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x01
415 #define TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x03
416 #define INFO_PARAMETER_TAG 0x04
417 #define DLCI_PARAMETER_TAG 0x05
418 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG 0x07
419 #define INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x08
420 #define HEARTBEAT_DATA_PARAMETER_TAG 0x09
421 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG 0x0b
422 #define ERROR_CODE_PARAMETER_TAG 0x0c
423 #define STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG 0x0d
424 #define PROTOCOL_DATA_PARAMETER_TAG 0x0e
425 #define RELEASE_REASON_PARAMETER_TAG 0x0f
426 #define TEI_STATUS_PARAMETER_TAG 0x10
427 #define ASP_IDENTIFIER_PARAMETER_TAG 0x11
428 #define DLC_STATUS_PARAMETER_TAG 0x12
429
430 static const value_string parameter_tag_values[] = {
431 { INT_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Integer interface identifier" },
432 { TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Text interface identifier" },
433 { INFO_PARAMETER_TAG, "Info" },
434 { DLCI_PARAMETER_TAG, "DLCI" },
435 { DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
436 { INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG, "Integer range interface identifier" },
437 { HEARTBEAT_DATA_PARAMETER_TAG, "Heartbeat data" },
438 { TRAFFIC_MODE_TYPE_PARAMETER_TAG, "Traffic mode type" },
439 { ERROR_CODE_PARAMETER_TAG, "Error code" },
440 { STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG, "Status type/identification" },
441 { PROTOCOL_DATA_PARAMETER_TAG, "Protocol data" },
442 { RELEASE_REASON_PARAMETER_TAG, "Reason" },
443 { TEI_STATUS_PARAMETER_TAG, "TEI status" },
444 { ASP_IDENTIFIER_PARAMETER_TAG, "ASP identifier"},
445 { DLC_STATUS_PARAMETER_TAG, "DLC status" },
446 { 0, NULL } };
447
448 static void
dissect_parameter(tvbuff_t * parameter_tvb,packet_info * pinfo,proto_tree * tree,proto_tree * dua_tree)449 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *dua_tree)
450 {
451 guint16 tag, length, padding_length;
452 proto_item *parameter_item;
453 proto_tree *parameter_tree;
454
455 /* extract tag and length from the parameter */
456 tag = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
457 length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
458 padding_length = tvb_reported_length(parameter_tvb) - length;
459
460 /* create proto_tree stuff */
461 parameter_tree = proto_tree_add_subtree(dua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET,
462 -1, ett_dua_parameter, ¶meter_item,
463 val_to_str_const(tag, parameter_tag_values, "Unknown parameter"));
464
465 /* add tag and length to the dua tree */
466 proto_tree_add_item(parameter_tree, hf_parameter_tag,
467 parameter_tvb, PARAMETER_TAG_OFFSET, PARAMETER_TAG_LENGTH, ENC_BIG_ENDIAN);
468 proto_tree_add_item(parameter_tree, hf_parameter_length,
469 parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, ENC_BIG_ENDIAN);
470
471 switch(tag) {
472 case INT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
473 dissect_int_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
474 break;
475 case TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
476 dissect_text_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
477 break;
478 case INFO_PARAMETER_TAG:
479 dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
480 break;
481 case DLCI_PARAMETER_TAG:
482 dissect_dlci_parameter(parameter_tvb, parameter_tree);
483 break;
484 case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
485 dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
486 break;
487 case INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG:
488 dissect_integer_range_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
489 break;
490 case HEARTBEAT_DATA_PARAMETER_TAG:
491 dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
492 break;
493 case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
494 dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
495 break;
496 case ERROR_CODE_PARAMETER_TAG:
497 dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
498 break;
499 case STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG:
500 dissect_status_type_identification_parameter(parameter_tvb, parameter_tree, parameter_item);
501 break;
502 case PROTOCOL_DATA_PARAMETER_TAG:
503 dissect_protocol_data_parameter(parameter_tvb, parameter_item, pinfo, tree);
504 break;
505 case RELEASE_REASON_PARAMETER_TAG:
506 dissect_release_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
507 break;
508 case TEI_STATUS_PARAMETER_TAG:
509 dissect_tei_status_parameter(parameter_tvb, parameter_tree, parameter_item);
510 break;
511 case ASP_IDENTIFIER_PARAMETER_TAG:
512 dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
513 break;
514 case DLC_STATUS_PARAMETER_TAG:
515 dissect_dlc_status_parameter(parameter_tvb, parameter_tree, parameter_item);
516 break;
517 default:
518 dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
519 break;
520 };
521
522 if (padding_length > 0)
523 proto_tree_add_item(parameter_tree, hf_parameter_padding,
524 parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, ENC_NA);
525 }
526
527 static void
dissect_parameters(tvbuff_t * parameters_tvb,packet_info * pinfo,proto_tree * tree,proto_tree * dua_tree)528 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *dua_tree)
529 {
530 gint offset, length, total_length, remaining_length;
531 tvbuff_t *parameter_tvb;
532
533 offset = 0;
534 while((remaining_length = tvb_reported_length_remaining(parameters_tvb, offset))) {
535 length = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
536 total_length = ADD_PADDING(length);
537 if (remaining_length >= length)
538 total_length = MIN(total_length, remaining_length);
539 /* create a tvb for the parameter including the padding bytes */
540 parameter_tvb = tvb_new_subset_length(parameters_tvb, offset, total_length);
541 dissect_parameter(parameter_tvb, pinfo, tree, dua_tree);
542 /* get rid of the handled parameter */
543 offset += total_length;
544 }
545 }
546
547 #define VERSION_LENGTH 1
548 #define RESERVED_LENGTH 1
549 #define MESSAGE_CLASS_LENGTH 1
550 #define MESSAGE_TYPE_LENGTH 1
551 #define MESSAGE_LENGTH_LENGTH 4
552 #define COMMON_HEADER_LENGTH (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
553 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
554
555 #define COMMON_HEADER_OFFSET 0
556 #define VERSION_OFFSET COMMON_HEADER_OFFSET
557 #define RESERVED_OFFSET (VERSION_OFFSET + VERSION_LENGTH)
558 #define MESSAGE_CLASS_OFFSET (RESERVED_OFFSET + RESERVED_LENGTH)
559 #define MESSAGE_TYPE_OFFSET (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
560 #define MESSAGE_LENGTH_OFFSET (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
561 #define PARAMETERS_OFFSET (COMMON_HEADER_OFFSET + COMMON_HEADER_LENGTH)
562
563 #define PROTOCOL_VERSION_RELEASE_1 1
564
565 static const value_string protocol_version_values[] = {
566 { PROTOCOL_VERSION_RELEASE_1, "Release 1" },
567 { 0, NULL } };
568
569 #define MESSAGE_CLASS_MGMT_MESSAGE 0
570 #define MESSAGE_CLASS_ASPSM_MESSAGE 3
571 #define MESSAGE_CLASS_ASPTM_MESSAGE 4
572 #define MESSAGE_CLASS_DPTM_MESSAGE 13
573
574 static const value_string message_class_values[] = {
575 { MESSAGE_CLASS_MGMT_MESSAGE, "Management messages" },
576 { MESSAGE_CLASS_ASPSM_MESSAGE, "ASP state maintenance messages" },
577 { MESSAGE_CLASS_ASPTM_MESSAGE, "ASP traffic maintenance messages" },
578 { MESSAGE_CLASS_DPTM_MESSAGE, "DPNSS/DASS2 boundary primitive transport messages" },
579 { 0, NULL } };
580
581 /* message types for MGMT messages */
582 #define MESSAGE_TYPE_ERR 0
583 #define MESSAGE_TYPE_NTFY 1
584 #define MESSAGE_TYPE_DLC_STAT_REQ 5
585 #define MESSAGE_TYPE_DLC_STAT_CON 6
586 #define MESSAGE_TYPE_DLC_STAT_IND 7
587
588 /* message types for ASPSM messages */
589 #define MESSAGE_TYPE_UP 1
590 #define MESSAGE_TYPE_DOWN 2
591 #define MESSAGE_TYPE_BEAT 3
592 #define MESSAGE_TYPE_UP_ACK 4
593 #define MESSAGE_TYPE_DOWN_ACK 5
594 #define MESSAGE_TYPE_BEAT_ACK 6
595
596 /* message types for ASPTM messages */
597 #define MESSAGE_TYPE_ACTIVE 1
598 #define MESSAGE_TYPE_INACTIVE 2
599 #define MESSAGE_TYPE_ACTIVE_ACK 3
600 #define MESSAGE_TYPE_INACTIVE_ACK 4
601
602 /* message types for DPTM messages */
603 #define MESSAGE_TYPE_DATA_REQUEST 1
604 #define MESSAGE_TYPE_DATA_INDICATION 2
605 #define MESSAGE_TYPE_ESTABLISH_REQUEST 5
606 #define MESSAGE_TYPE_ESTABLISH_CONFIRM 6
607 #define MESSAGE_TYPE_ESTABLISH_INDICATION 7
608 #define MESSAGE_TYPE_RELEASE_REQUEST 8
609 #define MESSAGE_TYPE_RELEASE_CONFIRM 9
610 #define MESSAGE_TYPE_RELEASE_INDICATION 10
611
612
613 static const value_string message_class_type_values[] = {
614 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "Error" },
615 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "Notify" },
616 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_DLC_STAT_REQ, "DLC status request" },
617 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_DLC_STAT_CON, "DLC status confirm" },
618 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_DLC_STAT_IND, "DLC status indication" },
619 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP up" },
620 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP down" },
621 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "Heartbeat" },
622 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP up ack" },
623 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP down ack" },
624 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "Heartbeat ack" },
625 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP active" },
626 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP inactive" },
627 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP active ack" },
628 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack" },
629 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_REQUEST, "Data request" },
630 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_INDICATION, "Data indication" },
631 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST, "Establish request" },
632 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM, "Establish confirmation" },
633 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "Establish indication" },
634 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_REQUEST, "Release request" },
635 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_CONFIRM, "Release confirmation" },
636 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_INDICATION, "Release indication" },
637 { 0, NULL } };
638
639 static const value_string message_class_type_acro_values[] = {
640 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_ERR, "ERR" },
641 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_NTFY, "NTFY" },
642 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_DLC_STAT_REQ, "DLC_STAT_REQ" },
643 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_DLC_STAT_CON, "DLC_STAT_CON" },
644 { MESSAGE_CLASS_MGMT_MESSAGE * 256 + MESSAGE_TYPE_DLC_STAT_IND, "DLC_STAT_IND" },
645 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP, "ASP_UP" },
646 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN, "ASP_DOWN" },
647 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT, "BEAT" },
648 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK, "ASP_UP_ACK" },
649 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK, "ASP_DOWN_ACK" },
650 { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK, "BEAT_ACK" },
651 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE , "ASP_ACTIVE" },
652 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE , "ASP_INACTIVE" },
653 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK , "ASP_ACTIVE_ACK" },
654 { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
655 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_REQUEST, "DATA_REQ" },
656 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_DATA_INDICATION, "DATA_IND" },
657 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST, "EST_REQ" },
658 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM, "EST_CON" },
659 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "EST_IND" },
660 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_REQUEST, "REL_REQ" },
661 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_CONFIRM, "REL_CON" },
662 { MESSAGE_CLASS_DPTM_MESSAGE * 256 + MESSAGE_TYPE_RELEASE_INDICATION, "REL_IND" },
663 { 0, NULL } };
664
665 static void
dissect_common_header(tvbuff_t * common_header_tvb,packet_info * pinfo,proto_tree * dua_tree)666 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *dua_tree)
667 {
668 guint8 message_class, message_type;
669
670 message_class = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
671 message_type = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
672
673 col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_class * 256 + message_type,
674 message_class_type_acro_values,
675 "Unknown"));
676
677 if (dua_tree) {
678 /* add the components of the common header to the protocol tree */
679 proto_tree_add_item(dua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
680 proto_tree_add_item(dua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, ENC_BIG_ENDIAN);
681 proto_tree_add_item(dua_tree, hf_message_class,
682 common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, ENC_BIG_ENDIAN);
683 proto_tree_add_uint_format_value(dua_tree, hf_message_type,
684 common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH,
685 message_type, "%u (%s)",
686 message_type, val_to_str_const(message_class * 256 + message_type,
687 message_class_type_values,
688 "reserved"));
689 proto_tree_add_item(dua_tree, hf_message_length,
690 common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
691 }
692 }
693
694 static void
dissect_dua_message(tvbuff_t * message_tvb,packet_info * pinfo,proto_tree * tree,proto_tree * dua_tree)695 dissect_dua_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *dua_tree)
696 {
697 tvbuff_t *common_header_tvb, *parameters_tvb;
698
699 common_header_tvb = tvb_new_subset_length(message_tvb, COMMON_HEADER_OFFSET, COMMON_HEADER_LENGTH);
700 parameters_tvb = tvb_new_subset_remaining(message_tvb, PARAMETERS_OFFSET);
701 dissect_common_header(common_header_tvb, pinfo, dua_tree);
702 dissect_parameters(parameters_tvb, pinfo, tree, dua_tree);
703 }
704
705 static int
dissect_dua(tvbuff_t * message_tvb,packet_info * pinfo,proto_tree * tree,void * data _U_)706 dissect_dua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
707 {
708 proto_item *dua_item;
709 proto_tree *dua_tree;
710
711 /* make entry in the Protocol column on summary display */
712 col_set_str(pinfo->cinfo, COL_PROTOCOL, "DUA");
713
714 /* create the m3ua protocol tree */
715 dua_item = proto_tree_add_item(tree, proto_dua, message_tvb, 0, -1, ENC_NA);
716 dua_tree = proto_item_add_subtree(dua_item, ett_dua);
717
718 /* dissect the message */
719 dissect_dua_message(message_tvb, pinfo, tree, dua_tree);
720 return tvb_captured_length(message_tvb);
721 }
722
723 /* Register the protocol with Wireshark */
724 void
proto_register_dua(void)725 proto_register_dua(void)
726 {
727
728 /* Setup list of header fields */
729 static hf_register_info hf[] = {
730 { &hf_int_interface_id,
731 { "Integer interface identifier", "dua.int_interface_identifier",
732 FT_UINT32, BASE_HEX, NULL, 0x0,
733 NULL, HFILL } },
734
735 { &hf_text_interface_id,
736 { "Text interface identifier", "dua.text_interface_identifier",
737 FT_STRING, BASE_NONE, NULL, 0x0,
738 NULL, HFILL } },
739
740 { &hf_info_string,
741 { "Info string", "dua.info_string",
742 FT_STRING, BASE_NONE, NULL, 0x0,
743 NULL, HFILL } },
744
745 { &hf_dlci_reserved,
746 { "Reserved", "dua.dlci_reserved",
747 FT_UINT16, BASE_DEC, NULL, RESERVED_BIT_MASK,
748 NULL, HFILL } },
749
750 { &hf_dlci_v_bit,
751 { "V-bit", "dua.dlci_v_bit",
752 FT_BOOLEAN, 16, NULL, V_BIT_MASK,
753 NULL, HFILL } },
754
755 { &hf_dlci_zero_bit,
756 { "Zero bit", "dua.dlci_zero_bit",
757 FT_BOOLEAN, 16, NULL, ZERO_BIT_MASK,
758 NULL, HFILL } },
759
760 { &hf_dlci_channel,
761 { "Channel", "dua.dlci_channel",
762 FT_UINT16, BASE_DEC, NULL, CHANNEL_BIT_MASK,
763 NULL, HFILL } },
764
765 { &hf_dlci_one_bit,
766 { "One bit", "dua.dlci_one_bit",
767 FT_BOOLEAN, 16, NULL, ONE_BIT_MASK,
768 NULL, HFILL } },
769
770 { &hf_dlci_spare,
771 { "Spare", "dua.dlci_spare",
772 FT_UINT16, BASE_DEC, NULL, 0x0,
773 NULL, HFILL } },
774
775 { &hf_diag_info,
776 { "Diagnostic information", "dua.diagnostic_information",
777 FT_BYTES, BASE_NONE, NULL, 0x0,
778 NULL, HFILL } },
779
780 { &hf_interface_range_start,
781 { "Start", "dua.interface_range_start",
782 FT_UINT32, BASE_DEC, NULL, 0x0,
783 NULL, HFILL } },
784
785 { &hf_interface_range_end,
786 { "End", "dua.interface_range_end",
787 FT_UINT32, BASE_DEC, NULL, 0x0,
788 NULL, HFILL } },
789
790 { &hf_heartbeat_data,
791 { "Heartbeat data", "dua.heartbeat_data",
792 FT_BYTES, BASE_NONE, NULL, 0x0,
793 NULL, HFILL } },
794
795 { &hf_traffic_mode_type,
796 { "Traffic mode type", "dua.traffic_mode_type",
797 FT_UINT32, BASE_HEX, VALS(traffic_mode_type_values), 0x0,
798 NULL, HFILL } },
799
800 { &hf_error_code,
801 { "Error code", "dua.error_code",
802 FT_UINT32, BASE_DEC, VALS(error_code_values), 0x0,
803 NULL, HFILL } },
804
805 { &hf_status_type,
806 { "Status type", "dua.status_type",
807 FT_UINT16, BASE_DEC, VALS(status_type_values), 0x0,
808 NULL, HFILL } },
809
810 { &hf_status_id,
811 { "Status identification", "dua.status_identification",
812 FT_UINT16, BASE_DEC, NULL, 0x0,
813 NULL, HFILL } },
814
815 { &hf_release_reason,
816 { "Reason", "dua.release_reason",
817 FT_UINT32, BASE_HEX, VALS(release_reason_values), 0x0,
818 NULL, HFILL } },
819
820 { &hf_tei_status,
821 { "TEI status", "dua.tei_status",
822 FT_UINT32, BASE_HEX, VALS(tei_status_values), 0x0,
823 NULL, HFILL } },
824
825 { &hf_asp_id,
826 { "ASP identifier", "dua.asp_identifier",
827 FT_UINT32, BASE_HEX, NULL, 0x0,
828 NULL, HFILL } },
829
830 { &hf_states,
831 { "States", "dua.states",
832 FT_BYTES, BASE_NONE, NULL, 0x0,
833 NULL, HFILL } },
834
835 { &hf_parameter_tag,
836 { "Parameter Tag", "dua.parameter_tag",
837 FT_UINT16, BASE_DEC, VALS(parameter_tag_values), 0x0,
838 NULL, HFILL } },
839
840 { &hf_parameter_length,
841 { "Parameter length", "dua.parameter_length",
842 FT_UINT16, BASE_DEC, NULL, 0x0,
843 NULL, HFILL } },
844
845 { &hf_parameter_value,
846 { "Parameter value", "dua.parameter_value",
847 FT_BYTES, BASE_NONE, NULL, 0x0,
848 NULL, HFILL } },
849
850 { &hf_parameter_padding,
851 { "Parameter padding", "dua.parameter_padding",
852 FT_BYTES, BASE_NONE, NULL, 0x0,
853 NULL, HFILL } },
854
855 { &hf_version,
856 { "Version", "dua.version",
857 FT_UINT8, BASE_DEC, VALS(protocol_version_values), 0x0,
858 NULL, HFILL } },
859
860 { &hf_reserved,
861 { "Reserved", "dua.reserved",
862 FT_UINT8, BASE_HEX, NULL, 0x0,
863 NULL, HFILL } },
864
865 { &hf_message_class,
866 { "Message class", "dua.message_class",
867 FT_UINT8, BASE_DEC, VALS(message_class_values), 0x0,
868 NULL, HFILL } },
869
870 { &hf_message_type,
871 { "Message Type", "dua.message_type",
872 FT_UINT8, BASE_DEC, NULL, 0x0,
873 NULL, HFILL } },
874
875 { &hf_message_length,
876 { "Message length", "dua.message_length",
877 FT_UINT32, BASE_DEC, NULL, 0x0,
878 NULL, HFILL } },
879
880 };
881 /* Setup protocol subtree array */
882 static gint *ett[] = {
883 &ett_dua,
884 &ett_dua_parameter,
885 };
886
887 /* Register the protocol name and description */
888 proto_dua = proto_register_protocol("DPNSS/DASS2-User Adaptation Layer", "DUA", "dua");
889
890 /* Required function calls to register the header fields and subtrees used */
891 proto_register_field_array(proto_dua, hf, array_length(hf));
892 proto_register_subtree_array(ett, array_length(ett));
893
894 /* Allow other dissectors to find this one by name. */
895 dua_handle = register_dissector("dua", dissect_dua, proto_dua);
896 }
897
898 void
proto_reg_handoff_dua(void)899 proto_reg_handoff_dua(void)
900 {
901 dpnss_handle = find_dissector_add_dependency("dpnss", proto_dua);
902 dissector_add_uint("sctp.ppi", DUA_PAYLOAD_PROTOCOL_ID, dua_handle);
903 }
904
905 /*
906 * Editor modelines - https://www.wireshark.org/tools/modelines.html
907 *
908 * Local Variables:
909 * c-basic-offset: 2
910 * tab-width: 8
911 * indent-tabs-mode: nil
912 * End:
913 *
914 * ex: set shiftwidth=2 tabstop=8 expandtab:
915 * :indentSize=2:tabSize=8:noTabs=true:
916 */
917