epan/dissectors/packet-dua.c

   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 #include <wsutil/ws_roundup.h>
  27
  28 void proto_register_dua(void);
  29 void proto_reg_handoff_dua(void);
  30
  31 /* Initialize the protocol and registered fields */
  32 static int proto_dua;
  33 static int hf_int_interface_id;
  34 static int hf_text_interface_id;
  35 static int hf_info_string;
  36 static int hf_dlci_reserved;
  37 static int hf_dlci_v_bit;
  38 static int hf_dlci_zero_bit;
  39 static int hf_dlci_channel;
  40 static int hf_dlci_one_bit;
  41 static int hf_dlci_spare;
  42 static int hf_diag_info;
  43 static int hf_interface_range_start;
  44 static int hf_interface_range_end;
  45 static int hf_heartbeat_data;
  46 static int hf_traffic_mode_type;
  47 static int hf_error_code;
  48 static int hf_status_type;
  49 static int hf_status_id;
  50 static int hf_release_reason;
  51 static int hf_tei_status;
  52 static int hf_asp_id;
  53 static int hf_states;
  54 static int hf_parameter_tag;
  55 static int hf_parameter_length;
  56 static int hf_parameter_value;
  57 static int hf_parameter_padding;
  58 static int hf_version;
  59 static int hf_reserved;
  60 static int hf_message_class;
  61 static int hf_message_type;
  62 static int hf_message_length;
  63
  64 /* Initialize the subtree pointers */
  65 static int ett_dua;
  66 static int ett_dua_parameter;
  67
  68 static dissector_handle_t dpnss_handle;
  69 static dissector_handle_t dua_handle;
  70
  71 #define PARAMETER_TAG_LENGTH    2
  72 #define PARAMETER_LENGTH_LENGTH 2
  73 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
  74
  75 #define PARAMETER_TAG_OFFSET    0
  76 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
  77 #define PARAMETER_VALUE_OFFSET  (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
  78 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
  79
  80 #define INT_INTERFACE_ID_OFFSET PARAMETER_VALUE_OFFSET
  81 #define INT_INTERFACE_ID_LENGTH 4
  82
  83 static void
  84 dissect_int_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
  85 {
  86   proto_tree_add_item(parameter_tree, hf_int_interface_id,
  87                       parameter_tvb, INT_INTERFACE_ID_OFFSET, INT_INTERFACE_ID_LENGTH, ENC_BIG_ENDIAN);
  88   proto_item_append_text(parameter_item, " (%d)", tvb_get_ntohl(parameter_tvb, INT_INTERFACE_ID_OFFSET));
  89 }
  90
  91 #define TEXT_INTERFACE_ID_OFFSET PARAMETER_VALUE_OFFSET
  92
  93 static void
  94 dissect_text_interface_identifier_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
  95 {
  96   uint16_t interface_id_length;
  97
  98   interface_id_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
  99
 100   proto_tree_add_item(parameter_tree, hf_text_interface_id,
 101                       parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length, ENC_ASCII);
 102   proto_item_append_text(parameter_item, " (%s)",
 103                          tvb_format_text(pinfo->pool, parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length));
 104 }
 105
 106 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
 107
 108 static void
 109 dissect_info_string_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
 110 {
 111   uint16_t info_string_length;
 112
 113   info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 114   proto_tree_add_item(parameter_tree, hf_info_string,
 115                       parameter_tvb, INFO_STRING_OFFSET, info_string_length, ENC_ASCII);
 116   proto_item_append_text(parameter_item, " (%s)",
 117                          tvb_format_text(pinfo->pool, parameter_tvb, INFO_STRING_OFFSET, info_string_length));
 118 }
 119
 120 #define DLCI_LENGTH  2
 121 #define SPARE_LENGTH 2
 122
 123 #define DLCI_OFFSET  PARAMETER_VALUE_OFFSET
 124 #define SPARE_OFFSET (DLCI_OFFSET + DLCI_LENGTH)
 125
 126 #define RESERVED_BIT_MASK 0xfe00
 127 #define V_BIT_MASK        0x0100
 128 #define ZERO_BIT_MASK     0x0080
 129 #define CHANNEL_BIT_MASK  0x007e
 130 #define ONE_BIT_MASK      0x0001
 131
 132 static void
 133 dissect_dlci_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 134 {
 135   proto_tree_add_item(parameter_tree, hf_dlci_reserved, parameter_tvb, DLCI_OFFSET,  DLCI_LENGTH,  ENC_BIG_ENDIAN);
 136   proto_tree_add_item(parameter_tree, hf_dlci_v_bit,    parameter_tvb, DLCI_OFFSET,  DLCI_LENGTH,  ENC_BIG_ENDIAN);
 137   proto_tree_add_item(parameter_tree, hf_dlci_zero_bit, parameter_tvb, DLCI_OFFSET,  DLCI_LENGTH,  ENC_BIG_ENDIAN);
 138   proto_tree_add_item(parameter_tree, hf_dlci_channel,  parameter_tvb, DLCI_OFFSET,  DLCI_LENGTH,  ENC_BIG_ENDIAN);
 139   proto_tree_add_item(parameter_tree, hf_dlci_one_bit,  parameter_tvb, DLCI_OFFSET,  DLCI_LENGTH,  ENC_BIG_ENDIAN);
 140   proto_tree_add_item(parameter_tree, hf_dlci_spare,    parameter_tvb, SPARE_OFFSET, SPARE_LENGTH, ENC_BIG_ENDIAN);
 141 }
 142
 143 static void
 144 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 145 {
 146   uint16_t diag_info_length;
 147
 148   diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 149   proto_tree_add_item(parameter_tree, hf_diag_info, parameter_tvb, PARAMETER_VALUE_OFFSET, diag_info_length, ENC_NA);
 150   proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
 151 }
 152
 153 #define START_LENGTH 4
 154 #define END_LENGTH   4
 155 #define INTERVAL_LENGTH (START_LENGTH + END_LENGTH)
 156
 157 #define START_OFFSET 0
 158 #define END_OFFSET   (START_OFFSET + START_LENGTH)
 159
 160 static void
 161 dissect_integer_range_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 162 {
 163   uint16_t number_of_ranges, range_number;
 164   int offset;
 165
 166   number_of_ranges = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) / INTERVAL_LENGTH;
 167   offset = PARAMETER_VALUE_OFFSET;
 168   for(range_number = 0; range_number < number_of_ranges; range_number++) {
 169     proto_tree_add_item(parameter_tree, hf_interface_range_start,
 170                         parameter_tvb, offset + START_OFFSET, START_LENGTH, ENC_BIG_ENDIAN);
 171     proto_tree_add_item(parameter_tree, hf_interface_range_end,
 172                         parameter_tvb, offset + END_OFFSET,   END_LENGTH,   ENC_BIG_ENDIAN);
 173     offset += INTERVAL_LENGTH;
 174   };
 175
 176   proto_item_append_text(parameter_item, " (%u range%s)", number_of_ranges, plurality(number_of_ranges, "", "s"));
 177 }
 178
 179 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
 180
 181 static void
 182 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 183 {
 184   uint16_t heartbeat_data_length;
 185
 186   heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 187   proto_tree_add_item(parameter_tree, hf_heartbeat_data,
 188                       parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, ENC_NA);
 189   proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
 190 }
 191
 192 #define OVER_RIDE_TRAFFIC_MODE_TYPE  1
 193 #define LOAD_SHARE_TRAFFIC_MODE_TYPE 2
 194
 195 static const value_string traffic_mode_type_values[] = {
 196   { OVER_RIDE_TRAFFIC_MODE_TYPE,      "Over-ride" },
 197   { LOAD_SHARE_TRAFFIC_MODE_TYPE,     "Load-share" },
 198   { 0,                    NULL } };
 199
 200 #define TRAFFIC_MODE_TYPE_LENGTH 4
 201 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 202
 203 static void
 204 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 205 {
 206   proto_tree_add_item(parameter_tree, hf_traffic_mode_type,
 207                       parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, ENC_BIG_ENDIAN);
 208   proto_item_append_text(parameter_item, " (%s)",
 209                          val_to_str_const(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET),
 210                                           traffic_mode_type_values, "unknown"));
 211 }
 212
 213 #define INVALID_VERSION_ERROR                         0x01
 214 #define INVALID_INTERFACE_IDENTIFIER_ERROR            0x02
 215 #define UNSUPPORTED_MESSAGE_CLASS_ERROR               0x03
 216 #define UNSUPPORTED_MESSAGE_TYPE_ERROR                0x04
 217 #define UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR       0x05
 218 #define UNEXPECTED_MESSAGE_ERROR                      0x06
 219 #define PROTOCOL_ERROR                                0x07
 220 #define UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR   0x08
 221 #define INVALID_STREAM_IDENTIFIER_ERROR               0x09
 222 #define REFUSED_MANAGEMENT_BLOCKING_ERROR             0x0d
 223 #define ASP_IDENTIFIER_REQUIRED_ERROR                 0x0e
 224 #define INVALID_ASP_IDENTIFIER_ERROR                  0x0f
 225 #define CHANNEL_NUMBER_OUT_OF_RANGE_ERROR             0x1c
 226 #define CHANNEL_NUMBER_NOT_CONFIGURED                 0x1d
 227
 228 static const value_string error_code_values[] = {
 229   { INVALID_VERSION_ERROR,                       "Invalid version" },
 230   { INVALID_INTERFACE_IDENTIFIER_ERROR,          "Invalid interface identifier" },
 231   { UNSUPPORTED_MESSAGE_CLASS_ERROR,             "Unsupported message class" },
 232   { UNSUPPORTED_MESSAGE_TYPE_ERROR,              "Unsupported message type" },
 233   { UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR,     "Unsupported traffic handling mode" },
 234   { UNEXPECTED_MESSAGE_ERROR,                    "Unexpected message" },
 235   { PROTOCOL_ERROR,                              "Protocol error" },
 236   { UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR, "Unsupported interface identifier type" },
 237   { INVALID_STREAM_IDENTIFIER_ERROR,             "Invalid stream identifier" },
 238   { REFUSED_MANAGEMENT_BLOCKING_ERROR,           "Refused - Management blocking" },
 239   { ASP_IDENTIFIER_REQUIRED_ERROR,               "ASP identifier required" },
 240   { INVALID_ASP_IDENTIFIER_ERROR,                "Invalid ASP Identifier" },
 241   { CHANNEL_NUMBER_OUT_OF_RANGE_ERROR,           "Channel number out of range" },
 242   { CHANNEL_NUMBER_NOT_CONFIGURED,               "Channel number not configured" },
 243   { 0,                                           NULL } };
 244
 245 #define ERROR_CODE_LENGTH 4
 246 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
 247
 248 static void
 249 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 250 {
 251   proto_tree_add_item(parameter_tree, hf_error_code,
 252                       parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, ENC_BIG_ENDIAN);
 253   proto_item_append_text(parameter_item, " (%s)",
 254                          val_to_str_const(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET),
 255                                           error_code_values,
 256                                           "unknown"));
 257 }
 258
 259 #define ASP_STATE_CHANGE_STATUS_TYPE  0x01
 260 #define OTHER_STATUS_TYPE             0x02
 261
 262 static const value_string status_type_values[] = {
 263   { ASP_STATE_CHANGE_STATUS_TYPE,        "Application server state change" },
 264   { OTHER_STATUS_TYPE,                   "Other" },
 265   { 0,                                   NULL } };
 266
 267 #define AS_DOWN_STATUS_IDENT          0x01
 268 #define AS_INACTIVE_STATUS_IDENT      0x02
 269 #define AS_ACTIVE_STATUS_IDENT        0x03
 270 #define AS_PENDING_STATUS_IDENT       0x04
 271
 272 #define INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT 0x01
 273 #define ALTERNATE_ASP_ACTIVE_STATUS_IDENT       0x02
 274
 275 static const value_string status_type_id_values[] = {
 276   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_DOWN_STATUS_IDENT,         "Application server down" },
 277   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_INACTIVE_STATUS_IDENT,     "Application server inactive" },
 278   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_ACTIVE_STATUS_IDENT,       "Application server active" },
 279   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_PENDING_STATUS_IDENT,      "Application server pending" },
 280   { OTHER_STATUS_TYPE * 256 * 256 + INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT, "Insufficient ASP resources active in AS" },
 281   { OTHER_STATUS_TYPE * 256 * 256 + ALTERNATE_ASP_ACTIVE_STATUS_IDENT,       "Alternate ASP active" },
 282   { 0,                                           NULL } };
 283
 284 #define STATUS_TYPE_LENGTH  2
 285 #define STATUS_IDENT_LENGTH 2
 286 #define STATUS_TYPE_OFFSET  PARAMETER_VALUE_OFFSET
 287 #define STATUS_IDENT_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
 288
 289 static void
 290 dissect_status_type_identification_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 291 {
 292   uint16_t status_type, status_id;
 293
 294   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 295   status_id   = tvb_get_ntohs(parameter_tvb, STATUS_IDENT_OFFSET);
 296
 297   proto_tree_add_item(parameter_tree, hf_status_type,
 298                       parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, ENC_BIG_ENDIAN);
 299   proto_tree_add_uint_format_value(parameter_tree, hf_status_id,  parameter_tvb, STATUS_IDENT_OFFSET, STATUS_IDENT_LENGTH,
 300                              status_id, "%u (%s)", status_id,
 301                              val_to_str_const(status_type * 256 * 256 + status_id, status_type_id_values, "unknown"));
 302
 303   proto_item_append_text(parameter_item, " (%s)",
 304                          val_to_str_const(status_type * 256 * 256 + status_id,
 305                                           status_type_id_values,
 306                                           "unknown status information"));
 307 }
 308
 309 #define PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
 310
 311 static void
 312 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, proto_item *parameter_item, packet_info *pinfo, proto_tree *tree)
 313 {
 314   uint16_t protocol_data_length;
 315   tvbuff_t *protocol_data_tvb;
 316
 317   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 318   protocol_data_tvb    = tvb_new_subset_length(parameter_tvb, PROTOCOL_DATA_OFFSET, protocol_data_length);
 319   if(dpnss_handle){
 320     call_dissector(dpnss_handle, protocol_data_tvb, pinfo, tree);
 321     return;
 322   }
 323
 324   call_data_dissector(protocol_data_tvb, pinfo, tree);
 325
 326   proto_item_append_text(parameter_item, " (%u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 327 }
 328
 329 #define RELEASE_MGMT_REASON   0
 330 #define RELEASE_PHYS_REASON   1
 331 #define RELEASE_DM_REASON     2
 332 #define RELEASE_OTHER_REASON  3
 333
 334 static const value_string release_reason_values[] = {
 335   { RELEASE_MGMT_REASON,  "Management layer generated release" },
 336   { RELEASE_PHYS_REASON,  "Physical layer alarm generated release" },
 337   { RELEASE_DM_REASON,    "Layer 2 should release" },
 338   { RELEASE_OTHER_REASON, "Other reason" },
 339   { 0,                    NULL } };
 340
 341 #define RELEASE_REASON_OFFSET PARAMETER_VALUE_OFFSET
 342 #define RELEASE_REASON_LENGTH 4
 343
 344 static void
 345 dissect_release_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 346 {
 347   proto_tree_add_item(parameter_tree, hf_release_reason,
 348                       parameter_tvb, RELEASE_REASON_OFFSET, RELEASE_REASON_LENGTH, ENC_BIG_ENDIAN);
 349   proto_item_append_text(parameter_item, " (%s)",
 350                          val_to_str_const(tvb_get_ntohl(parameter_tvb, RELEASE_REASON_OFFSET),
 351                                           release_reason_values,
 352                                           "unknown"));
 353 }
 354
 355 #define TEI_STATUS_ASSIGNED       0
 356 #define TEI_STATUS_UNASSIGNED     1
 357
 358 static const value_string tei_status_values[] = {
 359   { TEI_STATUS_ASSIGNED,   "TEI is considered assigned by Q.921" },
 360   { TEI_STATUS_UNASSIGNED, "TEI is considered unassigned by Q.921" },
 361   { 0,                    NULL } };
 362
 363 #define TEI_STATUS_LENGTH 4
 364 #define TEI_STATUS_OFFSET PARAMETER_VALUE_OFFSET
 365
 366 static void
 367 dissect_tei_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 368 {
 369   proto_tree_add_item(parameter_tree, hf_tei_status,
 370                       parameter_tvb, TEI_STATUS_OFFSET, TEI_STATUS_LENGTH, ENC_BIG_ENDIAN);
 371   proto_item_append_text(parameter_item, " (%s)",
 372                       val_to_str_const(tvb_get_ntohl(parameter_tvb, TEI_STATUS_OFFSET),
 373                                        tei_status_values,
 374                                        "unknown"));
 375 }
 376
 377 #define ASP_ID_LENGTH 4
 378 #define ASP_ID_OFFSET PARAMETER_VALUE_OFFSET
 379
 380 static void
 381 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 382 {
 383   proto_tree_add_item(parameter_tree, hf_asp_id, parameter_tvb, ASP_ID_OFFSET, ASP_ID_LENGTH, ENC_BIG_ENDIAN);
 384   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_ID_OFFSET));
 385 }
 386
 387 static void
 388 dissect_dlc_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item _U_)
 389 {
 390   uint16_t parameter_value_length;
 391
 392   /* FIXME: This can be done better */
 393   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 394   if (parameter_value_length > 0)
 395     proto_tree_add_item(parameter_tree,
 396                         hf_states, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
 397 }
 398
 399 static void
 400 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 401 {
 402   uint16_t parameter_value_length;
 403
 404   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 405   if (parameter_value_length > 0)
 406     proto_tree_add_item(parameter_tree, hf_parameter_value,
 407                         parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
 408   proto_item_append_text(parameter_item, " with tag %u and %u byte%s value",
 409                          tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET),
 410                          parameter_value_length, plurality(parameter_value_length, "", "s"));
 411 }
 412
 413 #define INT_INTERFACE_IDENTIFIER_PARAMETER_TAG           0x01
 414 #define TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG          0x03
 415 #define INFO_PARAMETER_TAG                               0x04
 416 #define DLCI_PARAMETER_TAG                               0x05
 417 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG             0x07
 418 #define INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x08
 419 #define HEARTBEAT_DATA_PARAMETER_TAG                     0x09
 420 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG                  0x0b
 421 #define ERROR_CODE_PARAMETER_TAG                         0x0c
 422 #define STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG        0x0d
 423 #define PROTOCOL_DATA_PARAMETER_TAG                      0x0e
 424 #define RELEASE_REASON_PARAMETER_TAG                     0x0f
 425 #define TEI_STATUS_PARAMETER_TAG                         0x10
 426 #define ASP_IDENTIFIER_PARAMETER_TAG                     0x11
 427 #define DLC_STATUS_PARAMETER_TAG                         0x12
 428
 429 static const value_string parameter_tag_values[] = {
 430   { INT_INTERFACE_IDENTIFIER_PARAMETER_TAG,                "Integer interface identifier" },
 431   { TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG,               "Text interface identifier" },
 432   { INFO_PARAMETER_TAG,                                    "Info" },
 433   { DLCI_PARAMETER_TAG,                                    "DLCI" },
 434   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,                  "Diagnostic information" },
 435   { INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG,      "Integer range interface identifier" },
 436   { HEARTBEAT_DATA_PARAMETER_TAG,                          "Heartbeat data" },
 437   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,                       "Traffic mode type" },
 438   { ERROR_CODE_PARAMETER_TAG,                              "Error code" },
 439   { STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG,             "Status type/identification" },
 440   { PROTOCOL_DATA_PARAMETER_TAG,                           "Protocol data" },
 441   { RELEASE_REASON_PARAMETER_TAG,                          "Reason" },
 442   { TEI_STATUS_PARAMETER_TAG,                              "TEI status" },
 443   { ASP_IDENTIFIER_PARAMETER_TAG,                          "ASP identifier"},
 444   { DLC_STATUS_PARAMETER_TAG,                              "DLC status" },
 445   { 0,                                                     NULL } };
 446
 447 static void
 448 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *dua_tree)
 449 {
 450   uint16_t tag, length, padding_length;
 451   proto_item *parameter_item;
 452   proto_tree *parameter_tree;
 453
 454   /* extract tag and length from the parameter */
 455   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
 456   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 457   padding_length = tvb_reported_length(parameter_tvb) - length;
 458
 459   /* create proto_tree stuff */
 460   parameter_tree   = proto_tree_add_subtree(dua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET,
 461                                          -1, ett_dua_parameter, &parameter_item,
 462                                          val_to_str_const(tag, parameter_tag_values, "Unknown parameter"));
 463
 464   /* add tag and length to the dua tree */
 465   proto_tree_add_item(parameter_tree, hf_parameter_tag,
 466                       parameter_tvb, PARAMETER_TAG_OFFSET, PARAMETER_TAG_LENGTH, ENC_BIG_ENDIAN);
 467   proto_tree_add_item(parameter_tree, hf_parameter_length,
 468                       parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, ENC_BIG_ENDIAN);
 469
 470   switch(tag) {
 471   case INT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
 472     dissect_int_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
 473     break;
 474   case TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
 475     dissect_text_interface_identifier_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
 476     break;
 477   case INFO_PARAMETER_TAG:
 478     dissect_info_string_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
 479     break;
 480   case DLCI_PARAMETER_TAG:
 481     dissect_dlci_parameter(parameter_tvb, parameter_tree);
 482     break;
 483   case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
 484     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
 485     break;
 486   case INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG:
 487     dissect_integer_range_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
 488     break;
 489   case HEARTBEAT_DATA_PARAMETER_TAG:
 490     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
 491     break;
 492   case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
 493     dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
 494     break;
 495   case ERROR_CODE_PARAMETER_TAG:
 496     dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
 497     break;
 498   case STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG:
 499     dissect_status_type_identification_parameter(parameter_tvb, parameter_tree, parameter_item);
 500     break;
 501   case PROTOCOL_DATA_PARAMETER_TAG:
 502     dissect_protocol_data_parameter(parameter_tvb, parameter_item, pinfo, tree);
 503     break;
 504   case RELEASE_REASON_PARAMETER_TAG:
 505     dissect_release_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
 506     break;
 507   case TEI_STATUS_PARAMETER_TAG:
 508     dissect_tei_status_parameter(parameter_tvb, parameter_tree, parameter_item);
 509     break;
 510   case ASP_IDENTIFIER_PARAMETER_TAG:
 511     dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
 512     break;
 513   case DLC_STATUS_PARAMETER_TAG:
 514     dissect_dlc_status_parameter(parameter_tvb, parameter_tree, parameter_item);
 515     break;
 516   default:
 517     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
 518     break;
 519   };
 520
 521   if (padding_length > 0)
 522     proto_tree_add_item(parameter_tree, hf_parameter_padding,
 523                         parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, ENC_NA);
 524 }
 525
 526 static void
 527 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *dua_tree)
 528 {
 529   int offset, length, total_length, remaining_length;
 530   tvbuff_t *parameter_tvb;
 531
 532   offset = 0;
 533   while((remaining_length = tvb_reported_length_remaining(parameters_tvb, offset))) {
 534     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
 535     total_length = WS_ROUNDUP_4(length);
 536     if (remaining_length >= length)
 537       total_length = MIN(total_length, remaining_length);
 538     /* create a tvb for the parameter including the padding bytes */
 539     parameter_tvb  = tvb_new_subset_length(parameters_tvb, offset, total_length);
 540     dissect_parameter(parameter_tvb, pinfo, tree, dua_tree);
 541     /* get rid of the handled parameter */
 542     offset += total_length;
 543   }
 544 }
 545
 546 #define VERSION_LENGTH         1
 547 #define RESERVED_LENGTH        1
 548 #define MESSAGE_CLASS_LENGTH   1
 549 #define MESSAGE_TYPE_LENGTH    1
 550 #define MESSAGE_LENGTH_LENGTH  4
 551 #define COMMON_HEADER_LENGTH   (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
 552                                 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
 553
 554 #define COMMON_HEADER_OFFSET   0
 555 #define VERSION_OFFSET         COMMON_HEADER_OFFSET
 556 #define RESERVED_OFFSET        (VERSION_OFFSET + VERSION_LENGTH)
 557 #define MESSAGE_CLASS_OFFSET   (RESERVED_OFFSET + RESERVED_LENGTH)
 558 #define MESSAGE_TYPE_OFFSET    (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
 559 #define MESSAGE_LENGTH_OFFSET  (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
 560 #define PARAMETERS_OFFSET      (COMMON_HEADER_OFFSET + COMMON_HEADER_LENGTH)
 561
 562 #define PROTOCOL_VERSION_RELEASE_1             1
 563
 564 static const value_string protocol_version_values[] = {
 565   { PROTOCOL_VERSION_RELEASE_1,  "Release 1" },
 566   { 0,                           NULL } };
 567
 568 #define MESSAGE_CLASS_MGMT_MESSAGE        0
 569 #define MESSAGE_CLASS_ASPSM_MESSAGE       3
 570 #define MESSAGE_CLASS_ASPTM_MESSAGE       4
 571 #define MESSAGE_CLASS_DPTM_MESSAGE       13
 572
 573 static const value_string message_class_values[] = {
 574   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
 575   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
 576   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
 577   { MESSAGE_CLASS_DPTM_MESSAGE,   "DPNSS/DASS2 boundary primitive transport messages" },
 578   { 0,                             NULL } };
 579
 580 /* message types for MGMT messages */
 581 #define MESSAGE_TYPE_ERR                  0
 582 #define MESSAGE_TYPE_NTFY                 1
 583 #define MESSAGE_TYPE_DLC_STAT_REQ         5
 584 #define MESSAGE_TYPE_DLC_STAT_CON         6
 585 #define MESSAGE_TYPE_DLC_STAT_IND         7
 586
 587 /* message types for ASPSM messages */
 588 #define MESSAGE_TYPE_UP                   1
 589 #define MESSAGE_TYPE_DOWN                 2
 590 #define MESSAGE_TYPE_BEAT                 3
 591 #define MESSAGE_TYPE_UP_ACK               4
 592 #define MESSAGE_TYPE_DOWN_ACK             5
 593 #define MESSAGE_TYPE_BEAT_ACK             6
 594
 595 /* message types for ASPTM messages */
 596 #define MESSAGE_TYPE_ACTIVE               1
 597 #define MESSAGE_TYPE_INACTIVE             2
 598 #define MESSAGE_TYPE_ACTIVE_ACK           3
 599 #define MESSAGE_TYPE_INACTIVE_ACK         4
 600
 601 /* message types for DPTM messages */
 602 #define MESSAGE_TYPE_DATA_REQUEST         1
 603 #define MESSAGE_TYPE_DATA_INDICATION      2
 604 #define MESSAGE_TYPE_ESTABLISH_REQUEST    5
 605 #define MESSAGE_TYPE_ESTABLISH_CONFIRM    6
 606 #define MESSAGE_TYPE_ESTABLISH_INDICATION 7
 607 #define MESSAGE_TYPE_RELEASE_REQUEST      8
 608 #define MESSAGE_TYPE_RELEASE_CONFIRM      9
 609 #define MESSAGE_TYPE_RELEASE_INDICATION  10
 610
 611
 612 static const value_string message_class_type_values[] = {
 613   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,                  "Error" },
 614   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,                 "Notify" },
 615   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_DLC_STAT_REQ,         "DLC status request" },
 616   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_DLC_STAT_CON,         "DLC status confirm" },
 617   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_DLC_STAT_IND,         "DLC status indication" },
 618   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,                   "ASP up" },
 619   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,                 "ASP down" },
 620   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,                 "Heartbeat" },
 621   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,               "ASP up ack" },
 622   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,             "ASP down ack" },
 623   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,             "Heartbeat ack" },
 624   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,              "ASP active" },
 625   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,            "ASP inactive" },
 626   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,          "ASP active ack" },
 627   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK ,        "ASP inactive ack" },
 628   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_REQUEST,         "Data request" },
 629   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_INDICATION,      "Data indication" },
 630   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST,    "Establish request" },
 631   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM,    "Establish confirmation" },
 632   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "Establish indication" },
 633   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_REQUEST,      "Release request" },
 634   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_CONFIRM,      "Release confirmation" },
 635   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_INDICATION,   "Release indication" },
 636   { 0,                                                                     NULL } };
 637
 638 static const value_string message_class_type_acro_values[] = {
 639   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,                  "ERR" },
 640   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,                 "NTFY" },
 641   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_DLC_STAT_REQ,         "DLC_STAT_REQ" },
 642   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_DLC_STAT_CON,         "DLC_STAT_CON" },
 643   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_DLC_STAT_IND,         "DLC_STAT_IND" },
 644   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,                   "ASP_UP" },
 645   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,                 "ASP_DOWN" },
 646   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,                 "BEAT" },
 647   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,               "ASP_UP_ACK" },
 648   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,             "ASP_DOWN_ACK" },
 649   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,             "BEAT_ACK" },
 650   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,              "ASP_ACTIVE" },
 651   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,            "ASP_INACTIVE" },
 652   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,          "ASP_ACTIVE_ACK" },
 653   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK ,        "ASP_INACTIVE_ACK" },
 654   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_REQUEST,         "DATA_REQ" },
 655   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_INDICATION,      "DATA_IND" },
 656   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST,    "EST_REQ" },
 657   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM,    "EST_CON" },
 658   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "EST_IND" },
 659   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_REQUEST,      "REL_REQ" },
 660   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_CONFIRM,      "REL_CON" },
 661   { MESSAGE_CLASS_DPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_INDICATION,   "REL_IND" },
 662   { 0,                                                                     NULL } };
 663
 664 static void
 665 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *dua_tree)
 666 {
 667   uint8_t message_class, message_type;
 668
 669   message_class  = tvb_get_uint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 670   message_type   = tvb_get_uint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 671
 672   col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str_const(message_class * 256 + message_type,
 673                                                                  message_class_type_acro_values,
 674                                                                  "Unknown"));
 675
 676   if (dua_tree) {
 677     /* add the components of the common header to the protocol tree */
 678     proto_tree_add_item(dua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
 679     proto_tree_add_item(dua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, ENC_BIG_ENDIAN);
 680     proto_tree_add_item(dua_tree, hf_message_class,
 681                         common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, ENC_BIG_ENDIAN);
 682     proto_tree_add_uint_format_value(dua_tree, hf_message_type,
 683                                common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH,
 684                                message_type, "%u (%s)",
 685                                message_type, val_to_str_const(message_class * 256 + message_type,
 686                                                               message_class_type_values,
 687                                                               "reserved"));
 688     proto_tree_add_item(dua_tree, hf_message_length,
 689                         common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
 690   }
 691 }
 692
 693 static void
 694 dissect_dua_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *dua_tree)
 695 {
 696   tvbuff_t *common_header_tvb, *parameters_tvb;
 697
 698   common_header_tvb = tvb_new_subset_length(message_tvb, COMMON_HEADER_OFFSET, COMMON_HEADER_LENGTH);
 699   parameters_tvb    = tvb_new_subset_remaining(message_tvb, PARAMETERS_OFFSET);
 700   dissect_common_header(common_header_tvb, pinfo, dua_tree);
 701   dissect_parameters(parameters_tvb, pinfo, tree, dua_tree);
 702 }
 703
 704 static int
 705 dissect_dua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
 706 {
 707   proto_item *dua_item;
 708   proto_tree *dua_tree;
 709
 710   /* make entry in the Protocol column on summary display */
 711   col_set_str(pinfo->cinfo, COL_PROTOCOL, "DUA");
 712
 713   /* create the m3ua protocol tree */
 714   dua_item = proto_tree_add_item(tree, proto_dua, message_tvb, 0, -1, ENC_NA);
 715   dua_tree = proto_item_add_subtree(dua_item, ett_dua);
 716
 717   /* dissect the message */
 718   dissect_dua_message(message_tvb, pinfo, tree, dua_tree);
 719   return tvb_captured_length(message_tvb);
 720 }
 721
 722 /* Register the protocol with Wireshark */
 723 void
 724 proto_register_dua(void)
 725 {
 726
 727   /* Setup list of header fields */
 728   static hf_register_info hf[] = {
 729     { &hf_int_interface_id,
 730       { "Integer interface identifier", "dua.int_interface_identifier",
 731         FT_UINT32,   BASE_HEX,  NULL,                          0x0,
 732         NULL, HFILL } },
 733
 734     { &hf_text_interface_id,
 735       { "Text interface identifier",    "dua.text_interface_identifier",
 736         FT_STRING,  BASE_NONE, NULL,                           0x0,
 737         NULL, HFILL } },
 738
 739     { &hf_info_string,
 740       { "Info string",                  "dua.info_string",
 741         FT_STRING,  BASE_NONE, NULL,                           0x0,
 742         NULL, HFILL } },
 743
 744     { &hf_dlci_reserved,
 745       { "Reserved",                     "dua.dlci_reserved",
 746         FT_UINT16,  BASE_DEC,  NULL,                           RESERVED_BIT_MASK,
 747         NULL, HFILL } },
 748
 749     { &hf_dlci_v_bit,
 750       { "V-bit",                        "dua.dlci_v_bit",
 751         FT_BOOLEAN, 16,        NULL,                           V_BIT_MASK,
 752         NULL, HFILL } },
 753
 754     { &hf_dlci_zero_bit,
 755       { "Zero bit",                     "dua.dlci_zero_bit",
 756         FT_BOOLEAN, 16,        NULL,                           ZERO_BIT_MASK,
 757         NULL, HFILL } },
 758
 759     { &hf_dlci_channel,
 760       { "Channel",                      "dua.dlci_channel",
 761         FT_UINT16,   BASE_DEC, NULL,                           CHANNEL_BIT_MASK,
 762         NULL, HFILL } },
 763
 764     { &hf_dlci_one_bit,
 765       { "One bit",                      "dua.dlci_one_bit",
 766         FT_BOOLEAN, 16,        NULL,                           ONE_BIT_MASK,
 767         NULL, HFILL } },
 768
 769     { &hf_dlci_spare,
 770       { "Spare",                        "dua.dlci_spare",
 771         FT_UINT16,  BASE_DEC,  NULL,                           0x0,
 772         NULL, HFILL } },
 773
 774     { &hf_diag_info,
 775       { "Diagnostic information",       "dua.diagnostic_information",
 776         FT_BYTES,   BASE_NONE, NULL,                           0x0,
 777         NULL, HFILL } },
 778
 779     { &hf_interface_range_start,
 780       { "Start",                        "dua.interface_range_start",
 781         FT_UINT32,  BASE_DEC,  NULL,                           0x0,
 782         NULL, HFILL } },
 783
 784     { &hf_interface_range_end,
 785       { "End",                          "dua.interface_range_end",
 786         FT_UINT32,  BASE_DEC,  NULL,                           0x0,
 787         NULL, HFILL } },
 788
 789     { &hf_heartbeat_data,
 790       { "Heartbeat data",               "dua.heartbeat_data",
 791         FT_BYTES,   BASE_NONE, NULL,                           0x0,
 792         NULL, HFILL } },
 793
 794     { &hf_traffic_mode_type,
 795       { "Traffic mode type",            "dua.traffic_mode_type",
 796         FT_UINT32,  BASE_HEX,  VALS(traffic_mode_type_values), 0x0,
 797         NULL, HFILL } },
 798
 799     { &hf_error_code,
 800       { "Error code",                   "dua.error_code",
 801         FT_UINT32,  BASE_DEC,  VALS(error_code_values),        0x0,
 802         NULL, HFILL } },
 803
 804     { &hf_status_type,
 805       { "Status type",                  "dua.status_type",
 806         FT_UINT16,  BASE_DEC,  VALS(status_type_values),       0x0,
 807         NULL, HFILL } },
 808
 809     { &hf_status_id,
 810       { "Status identification",        "dua.status_identification",
 811         FT_UINT16,  BASE_DEC,  NULL,                           0x0,
 812         NULL, HFILL } },
 813
 814     { &hf_release_reason,
 815       { "Reason",                       "dua.release_reason",
 816         FT_UINT32,  BASE_HEX,  VALS(release_reason_values),    0x0,
 817         NULL, HFILL } },
 818
 819     { &hf_tei_status,
 820       { "TEI status",                   "dua.tei_status",
 821         FT_UINT32,  BASE_HEX,  VALS(tei_status_values),        0x0,
 822         NULL, HFILL } },
 823
 824     { &hf_asp_id,
 825       { "ASP identifier",               "dua.asp_identifier",
 826         FT_UINT32,  BASE_HEX,  NULL,                           0x0,
 827         NULL, HFILL } },
 828
 829     { &hf_states,
 830       { "States",                       "dua.states",
 831         FT_BYTES,   BASE_NONE, NULL,                           0x0,
 832         NULL, HFILL } },
 833
 834     { &hf_parameter_tag,
 835       { "Parameter Tag",                "dua.parameter_tag",
 836         FT_UINT16,  BASE_DEC,  VALS(parameter_tag_values),     0x0,
 837         NULL, HFILL } },
 838
 839     { &hf_parameter_length,
 840       { "Parameter length",             "dua.parameter_length",
 841         FT_UINT16,  BASE_DEC,  NULL,                           0x0,
 842         NULL, HFILL } },
 843
 844     { &hf_parameter_value,
 845       { "Parameter value",              "dua.parameter_value",
 846         FT_BYTES,   BASE_NONE, NULL,                           0x0,
 847         NULL, HFILL } },
 848
 849     { &hf_parameter_padding,
 850       { "Parameter padding",            "dua.parameter_padding",
 851         FT_BYTES,   BASE_NONE, NULL,                           0x0,
 852         NULL, HFILL } },
 853
 854     { &hf_version,
 855       { "Version",                      "dua.version",
 856         FT_UINT8,   BASE_DEC,  VALS(protocol_version_values),  0x0,
 857         NULL, HFILL } },
 858
 859     { &hf_reserved,
 860       { "Reserved",                     "dua.reserved",
 861         FT_UINT8,   BASE_HEX,  NULL,                           0x0,
 862         NULL, HFILL } },
 863
 864     { &hf_message_class,
 865       { "Message class",                "dua.message_class",
 866         FT_UINT8,   BASE_DEC,  VALS(message_class_values),     0x0,
 867         NULL, HFILL } },
 868
 869     { &hf_message_type,
 870       { "Message Type",                 "dua.message_type",
 871         FT_UINT8,   BASE_DEC,  NULL,                           0x0,
 872         NULL, HFILL } },
 873
 874     { &hf_message_length,
 875       { "Message length",               "dua.message_length",
 876         FT_UINT32,  BASE_DEC,  NULL,                           0x0,
 877         NULL, HFILL } },
 878
 879    };
 880   /* Setup protocol subtree array */
 881   static int *ett[] = {
 882     &ett_dua,
 883     &ett_dua_parameter,
 884   };
 885
 886   /* Register the protocol name and description */
 887   proto_dua = proto_register_protocol("DPNSS/DASS2-User Adaptation Layer", "DUA", "dua");
 888
 889   /* Required function calls to register the header fields and subtrees used */
 890   proto_register_field_array(proto_dua, hf, array_length(hf));
 891   proto_register_subtree_array(ett, array_length(ett));
 892
 893   /* Allow other dissectors to find this one by name. */
 894   dua_handle = register_dissector("dua", dissect_dua, proto_dua);
 895 }
 896
 897 void
 898 proto_reg_handoff_dua(void)
 899 {
 900   dpnss_handle = find_dissector_add_dependency("dpnss", proto_dua);
 901   dissector_add_uint("sctp.ppi", DUA_PAYLOAD_PROTOCOL_ID, dua_handle);
 902 }
 903
 904 /*
 905  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 906  *
 907  * Local Variables:
 908  * c-basic-offset: 2
 909  * tab-width: 8
 910  * indent-tabs-mode: nil
 911  * End:
 912  *
 913  * ex: set shiftwidth=2 tabstop=8 expandtab:
 914  * :indentSize=2:tabSize=8:noTabs=true:
 915  */