epan/dissectors/packet-iua.c

   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 #include <wsutil/ws_roundup.h>
  28
  29 void proto_register_iua(void);
  30 void proto_reg_handoff_iua(void);
  31
  32 static module_t *iua_module;
  33
  34 static dissector_table_t lapd_gsm_sapi_dissector_table;
  35
  36 /* Whether to use GSM SAPI vals or not */
  37 static bool global_iua_gsm_sapis = true;
  38
  39 /* Initialize the protocol and registered fields */
  40 static int proto_iua;
  41 static int hf_int_interface_id;
  42 static int hf_text_interface_id;
  43 static int hf_info_string;
  44 static int hf_dlci_zero_bit;
  45 static int hf_dlci_spare_bit;
  46 static int hf_dlci_sapi;
  47 static int hf_dlci_gsm_sapi;
  48 static int hf_dlci_one_bit;
  49 static int hf_dlci_tei;
  50 static int hf_dlci_spare;
  51 static int hf_diag_info;
  52 static int hf_interface_range_start;
  53 static int hf_interface_range_end;
  54 static int hf_heartbeat_data;
  55 static int hf_asp_reason;
  56 static int hf_traffic_mode_type;
  57 static int hf_error_code;
  58 static int hf_error_code_ig;
  59 static int hf_status_type;
  60 static int hf_status_id;
  61 static int hf_release_reason;
  62 static int hf_tei_status;
  63 static int hf_asp_id;
  64 static int hf_parameter_tag;
  65 static int hf_parameter_tag_ig;
  66 static int hf_parameter_length;
  67 static int hf_parameter_value;
  68 static int hf_parameter_padding;
  69 static int hf_version;
  70 static int hf_reserved;
  71 static int hf_message_class;
  72 static int hf_message_type;
  73 static int hf_message_length;
  74
  75 /* Initialize the subtree pointers */
  76 static int ett_iua;
  77 static int ett_iua_parameter;
  78
  79 /* stores the current SAPI value */
  80 static uint8_t sapi_val;
  81 static bool sapi_val_assigned;
  82
  83 /* option setable via preferences, default is plain RFC 3057 */
  84 static bool support_IG;
  85
  86 static dissector_handle_t q931_handle;
  87 static dissector_handle_t x25_handle;
  88 static dissector_handle_t iua_handle;
  89
  90 #define PARAMETER_TAG_LENGTH    2
  91 #define PARAMETER_LENGTH_LENGTH 2
  92 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
  93
  94 #define PARAMETER_TAG_OFFSET    0
  95 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
  96 #define PARAMETER_VALUE_OFFSET  (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
  97 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
  98
  99 #define INT_INTERFACE_ID_LENGTH 4
 100
 101 static void
 102 dissect_int_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 103 {
 104   uint16_t number_of_ids, id_number;
 105   int offset;
 106
 107   number_of_ids= (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) / INT_INTERFACE_ID_LENGTH;
 108   offset = PARAMETER_VALUE_OFFSET;
 109
 110   proto_item_append_text(parameter_item, " (");
 111   for (id_number = 0; id_number < number_of_ids; id_number++) {
 112     proto_tree_add_item(parameter_tree, hf_int_interface_id, parameter_tvb, offset, INT_INTERFACE_ID_LENGTH, ENC_BIG_ENDIAN);
 113     proto_item_append_text(parameter_item, (id_number > 0) ? ", %d" : "%d", tvb_get_ntohl(parameter_tvb, offset));
 114     offset += INT_INTERFACE_ID_LENGTH;
 115   }
 116   proto_item_append_text(parameter_item, ")");
 117 }
 118
 119 #define TEXT_INTERFACE_ID_OFFSET PARAMETER_VALUE_OFFSET
 120
 121 static void
 122 dissect_text_interface_identifier_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
 123 {
 124   uint16_t interface_id_length;
 125
 126   interface_id_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 127
 128   proto_tree_add_item(parameter_tree, hf_text_interface_id, parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length, ENC_ASCII);
 129   proto_item_append_text(parameter_item, " (%s)",
 130                          tvb_format_text(pinfo->pool, parameter_tvb, TEXT_INTERFACE_ID_OFFSET, interface_id_length));
 131 }
 132
 133 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
 134
 135 static void
 136 dissect_info_string_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *parameter_tree, proto_item *parameter_item)
 137 {
 138   uint16_t info_string_length;
 139
 140   info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 141   proto_tree_add_item(parameter_tree, hf_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, ENC_ASCII);
 142   proto_item_append_text(parameter_item, " (%s)",
 143                          tvb_format_text(pinfo->pool, parameter_tvb, INFO_STRING_OFFSET, info_string_length));
 144 }
 145
 146 #define DLCI_SAPI_LENGTH  1
 147 #define DLCI_TEI_LENGTH   1
 148 #define DLCI_SPARE_LENGTH 2
 149
 150 #define DLCI_SAPI_OFFSET  PARAMETER_VALUE_OFFSET
 151 #define DLCI_TEI_OFFSET   (DLCI_SAPI_OFFSET + DLCI_SAPI_LENGTH)
 152 #define DLCI_SPARE_OFFSET (DLCI_TEI_OFFSET + DLCI_TEI_LENGTH)
 153
 154 #define ZERO_BIT_MASK     0x01
 155 #define SPARE_BIT_MASK    0x02
 156 #define SAPI_MASK         0xfc
 157 #define SAPI_SHIFT        2
 158 #define ONE_BIT_MASK      0x01
 159 #define TEI_MASK          0xfe
 160
 161 /* SAPI values taken from Q.921 */
 162 #define SAPI_VAL_CALL_CONTROL 0
 163 #define SAPI_VAL_Q931_PACKET  1
 164 #define SAPI_VAL_TELACTION    12
 165 #define SAPI_VAL_X25          16
 166 #define SAPI_VAL_LAYER_2      63
 167 static const value_string sapi_values[] = {
 168   { SAPI_VAL_CALL_CONTROL,    "Call control procedures" },
 169   { SAPI_VAL_Q931_PACKET,     "Q.931 packet mode communication" },
 170   { SAPI_VAL_TELACTION,       "Teleaction communication" },
 171   { SAPI_VAL_X25,             "X.25 packet communication" },
 172   { SAPI_VAL_LAYER_2,         "Layer 2 management procedures" },
 173   { 0,                        NULL }
 174 };
 175
 176 static const value_string gsm_sapi_vals[] = {
 177   { LAPD_GSM_SAPI_RA_SIG_PROC,  "Radio signalling procedures" },
 178   { LAPD_GSM_SAPI_NOT_USED_1,   "(Not used in GSM PLMN)" },
 179   { LAPD_GSM_SAPI_NOT_USED_16,  "(Not used in GSM PLMN)" },
 180   { LAPD_GSM_SAPI_OM_PROC,      "Operation and maintenance procedure" },
 181   { LAPD_SAPI_L2,               "Layer 2 management procedures" },
 182   { 0,                          NULL }
 183 };
 184
 185 static void
 186 dissect_dlci_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 187 {
 188   proto_tree_add_item(parameter_tree, hf_dlci_zero_bit,  parameter_tvb, DLCI_SAPI_OFFSET,  DLCI_SAPI_LENGTH,  ENC_BIG_ENDIAN);
 189   proto_tree_add_item(parameter_tree, hf_dlci_spare_bit, parameter_tvb, DLCI_SAPI_OFFSET,  DLCI_SAPI_LENGTH,  ENC_BIG_ENDIAN);
 190   /* Add the SAPI + some explanatory text, store the SAPI value so that we can later how to
 191    * dissect the protocol data */
 192   if(global_iua_gsm_sapis) {
 193     proto_tree_add_item(parameter_tree, hf_dlci_gsm_sapi, parameter_tvb, DLCI_SAPI_OFFSET,  DLCI_SAPI_LENGTH,  ENC_BIG_ENDIAN);
 194   } else {
 195     proto_tree_add_item(parameter_tree, hf_dlci_sapi, parameter_tvb, DLCI_SAPI_OFFSET,  DLCI_SAPI_LENGTH,  ENC_BIG_ENDIAN);
 196   }
 197   sapi_val = (tvb_get_uint8(parameter_tvb, DLCI_SAPI_OFFSET) & SAPI_MASK) >> SAPI_SHIFT;
 198   sapi_val_assigned = true;
 199
 200   proto_tree_add_item(parameter_tree, hf_dlci_one_bit,   parameter_tvb, DLCI_TEI_OFFSET,   DLCI_TEI_LENGTH,   ENC_BIG_ENDIAN);
 201   proto_tree_add_item(parameter_tree, hf_dlci_tei,       parameter_tvb, DLCI_TEI_OFFSET,   DLCI_TEI_LENGTH,   ENC_BIG_ENDIAN);
 202   proto_tree_add_item(parameter_tree, hf_dlci_spare,     parameter_tvb, DLCI_SPARE_OFFSET, DLCI_SPARE_LENGTH, ENC_BIG_ENDIAN);
 203 }
 204
 205 static void
 206 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 207 {
 208   uint16_t diag_info_length;
 209
 210   diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 211   proto_tree_add_item(parameter_tree, hf_diag_info, parameter_tvb, PARAMETER_VALUE_OFFSET, diag_info_length, ENC_NA);
 212   proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
 213 }
 214
 215 #define START_LENGTH 4
 216 #define END_LENGTH   4
 217 #define INTERVAL_LENGTH (START_LENGTH + END_LENGTH)
 218
 219 #define START_OFFSET 0
 220 #define END_OFFSET   (START_OFFSET + START_LENGTH)
 221
 222 static void
 223 dissect_integer_range_interface_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 224 {
 225   uint16_t number_of_ranges, range_number;
 226   int offset;
 227
 228   number_of_ranges = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) / INTERVAL_LENGTH;
 229   offset = PARAMETER_VALUE_OFFSET;
 230   proto_item_append_text(parameter_item, " (");
 231   for (range_number = 0; range_number < number_of_ranges; range_number++) {
 232     proto_tree_add_item(parameter_tree, hf_interface_range_start, parameter_tvb, offset + START_OFFSET, START_LENGTH, ENC_BIG_ENDIAN);
 233     proto_tree_add_item(parameter_tree, hf_interface_range_end,   parameter_tvb, offset + END_OFFSET,   END_LENGTH,   ENC_BIG_ENDIAN);
 234     proto_item_append_text(parameter_item, (range_number > 0) ? ", %d-%d" : "%d-%d",
 235                            tvb_get_ntohl(parameter_tvb, offset + START_OFFSET), tvb_get_ntohl(parameter_tvb, offset + END_OFFSET));
 236     offset += INTERVAL_LENGTH;
 237   }
 238   proto_item_append_text(parameter_item, ")");
 239 }
 240
 241 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
 242
 243 static void
 244 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 245 {
 246   uint16_t heartbeat_data_length;
 247
 248   heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 249   proto_tree_add_item(parameter_tree, hf_heartbeat_data, parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, ENC_NA);
 250   proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
 251 }
 252
 253 #define ASP_MGMT_REASON   1
 254
 255 static const value_string asp_reason_values[] = {
 256   { ASP_MGMT_REASON,      "Management inhibit" },
 257   { 0,                    NULL } };
 258
 259 #define ASP_REASON_LENGTH 4
 260 #define ASP_REASON_OFFSET PARAMETER_VALUE_OFFSET
 261
 262 static void
 263 dissect_asp_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 264 {
 265   proto_tree_add_item(parameter_tree, hf_asp_reason, parameter_tvb, ASP_REASON_OFFSET, ASP_REASON_LENGTH, ENC_BIG_ENDIAN);
 266   proto_item_append_text(parameter_item, " (%s)", val_to_str_const(tvb_get_ntohl(parameter_tvb, ASP_REASON_OFFSET), asp_reason_values, "unknown"));
 267 }
 268
 269 #define OVER_RIDE_TRAFFIC_MODE_TYPE  1
 270 #define LOAD_SHARE_TRAFFIC_MODE_TYPE 2
 271
 272 static const value_string traffic_mode_type_values[] = {
 273   { OVER_RIDE_TRAFFIC_MODE_TYPE,      "Over-ride" },
 274   { LOAD_SHARE_TRAFFIC_MODE_TYPE,     "Load-share" },
 275   { 0,                    NULL } };
 276
 277 #define TRAFFIC_MODE_TYPE_LENGTH 4
 278 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 279
 280 static void
 281 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 282 {
 283   proto_tree_add_item(parameter_tree, hf_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, ENC_BIG_ENDIAN);
 284   proto_item_append_text(parameter_item, " (%s)",
 285                          val_to_str_const(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), traffic_mode_type_values, "unknown"));
 286 }
 287
 288 #define INVALID_VERSION_ERROR                         0x01
 289 #define INVALID_INTERFACE_IDENTIFIER_ERROR            0x02
 290 #define UNSUPPORTED_MESSAGE_CLASS_ERROR               0x03
 291 #define UNSUPPORTED_MESSAGE_TYPE_ERROR                0x04
 292 #define UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR       0x05
 293 #define UNEXPECTED_MESSAGE_ERROR                      0x06
 294 #define PROTOCOL_ERROR                                0x07
 295 #define UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR   0x08
 296 #define INVALID_STREAM_IDENTIFIER_ERROR               0x09
 297 #define UNASSIGNED_TEI_ERROR                          0x0a
 298 #define UNRECOGNIZED_SAPI_ERROR                       0x0b
 299 #define INVALID_TEI_SAPI_COMBINATION_ERROR            0x0c
 300 #define REFUSED_MANAGEMENT_BLOCKING_ERROR             0x0d
 301 #define ASP_IDENTIFIER_REQUIRED_ERROR                 0x0e
 302 #define INVALID_ASP_IDENTIFIER_ERROR                  0x0f
 303
 304 static const value_string error_code_values[] = {
 305   { INVALID_VERSION_ERROR,                       "Invalid version" },
 306   { INVALID_INTERFACE_IDENTIFIER_ERROR,          "Invalid interface identifier" },
 307   { UNSUPPORTED_MESSAGE_CLASS_ERROR,             "Unsupported message class" },
 308   { UNSUPPORTED_MESSAGE_TYPE_ERROR,              "Unsupported message type" },
 309   { UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR,     "Unsupported traffic handling mode" },
 310   { UNEXPECTED_MESSAGE_ERROR,                    "Unexpected message" },
 311   { PROTOCOL_ERROR,                              "Protocol error" },
 312   { UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR, "Unsupported interface identifier type" },
 313   { INVALID_STREAM_IDENTIFIER_ERROR,             "Invalid stream identifier" },
 314   { UNASSIGNED_TEI_ERROR,                        "Unassigned TEI" },
 315   { UNRECOGNIZED_SAPI_ERROR,                     "Unrecognized SAPI" },
 316   { INVALID_TEI_SAPI_COMBINATION_ERROR,          "Invalid TEI/SAPI combination" },
 317   { 0,                                           NULL } };
 318
 319 static const value_string error_code_ig_values[] = {
 320   { INVALID_VERSION_ERROR,                       "Invalid version" },
 321   { INVALID_INTERFACE_IDENTIFIER_ERROR,          "Invalid interface identifier" },
 322   { UNSUPPORTED_MESSAGE_CLASS_ERROR,             "Unsupported message class" },
 323   { UNSUPPORTED_MESSAGE_TYPE_ERROR,              "Unsupported message type" },
 324   { UNSUPPORTED_TRAFFIC_HANDLING_MODE_ERROR,     "Unsupported traffic handling mode" },
 325   { UNEXPECTED_MESSAGE_ERROR,                    "Unexpected message" },
 326   { PROTOCOL_ERROR,                              "Protocol error" },
 327   { UNSUPPORTED_INTERFACE_IDENTIFIER_TYPE_ERROR, "Unsupported interface identifier type" },
 328   { INVALID_STREAM_IDENTIFIER_ERROR,             "Invalid stream identifier" },
 329   { UNASSIGNED_TEI_ERROR,                        "Unassigned TEI" },
 330   { UNRECOGNIZED_SAPI_ERROR,                     "Unrecognized SAPI" },
 331   { INVALID_TEI_SAPI_COMBINATION_ERROR,          "Invalid TEI/SAPI combination" },
 332   { REFUSED_MANAGEMENT_BLOCKING_ERROR,           "Refused - Management blocking" },
 333   { ASP_IDENTIFIER_REQUIRED_ERROR,               "ASP identifier required" },
 334   { INVALID_ASP_IDENTIFIER_ERROR,                "Invalid ASP identifier" },
 335   { 0,                                           NULL } };
 336
 337 #define ERROR_CODE_LENGTH 4
 338 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
 339
 340 static void
 341 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 342 {
 343   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);
 344   proto_item_append_text(parameter_item, " (%s)",
 345                          val_to_str_const(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), support_IG?error_code_ig_values:error_code_values, "unknown"));
 346 }
 347
 348 #define ASP_STATE_CHANGE_STATUS_TYPE  0x01
 349 #define OTHER_STATUS_TYPE             0x02
 350
 351 static const value_string status_type_values[] = {
 352   { ASP_STATE_CHANGE_STATUS_TYPE,        "Application server state change" },
 353   { OTHER_STATUS_TYPE,                   "Other" },
 354   { 0,                                   NULL } };
 355
 356 #define AS_DOWN_STATUS_IDENT          0x01
 357 #define AS_INACTIVE_STATUS_IDENT      0x02
 358 #define AS_ACTIVE_STATUS_IDENT        0x03
 359 #define AS_PENDING_STATUS_IDENT       0x04
 360
 361 #define INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT 0x01
 362 #define ALTERNATE_ASP_ACTIVE_STATUS_IDENT       0x02
 363
 364 static const value_string status_type_id_values[] = {
 365   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_DOWN_STATUS_IDENT,         "Application server down" },
 366   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_INACTIVE_STATUS_IDENT,     "Application server inactive" },
 367   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_ACTIVE_STATUS_IDENT,       "Application server active" },
 368   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_PENDING_STATUS_IDENT,      "Application server pending" },
 369   { OTHER_STATUS_TYPE * 256 * 256 + INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT, "Insufficient ASP resources active in AS" },
 370   { OTHER_STATUS_TYPE * 256 * 256 + ALTERNATE_ASP_ACTIVE_STATUS_IDENT,       "Alternate ASP active" },
 371   { 0,                                           NULL } };
 372
 373 static const value_string status_type_id_ig_values[] = {
 374   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_INACTIVE_STATUS_IDENT,     "Application server inactive" },
 375   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_ACTIVE_STATUS_IDENT,       "Application server active" },
 376   { ASP_STATE_CHANGE_STATUS_TYPE * 256 * 256 + AS_PENDING_STATUS_IDENT,      "Application server pending" },
 377   { OTHER_STATUS_TYPE * 256 * 256 + INSUFFICIENT_ASP_RESOURCES_STATUS_IDENT, "Insufficient ASP resources active in AS" },
 378   { OTHER_STATUS_TYPE * 256 * 256 + ALTERNATE_ASP_ACTIVE_STATUS_IDENT,       "Alternate ASP active" },
 379   { 0,                                           NULL } };
 380
 381 #define STATUS_TYPE_LENGTH  2
 382 #define STATUS_IDENT_LENGTH 2
 383 #define STATUS_TYPE_OFFSET  PARAMETER_VALUE_OFFSET
 384 #define STATUS_IDENT_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
 385
 386 static void
 387 dissect_status_type_identification_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 388 {
 389   uint16_t status_type, status_id;
 390
 391   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 392   status_id   = tvb_get_ntohs(parameter_tvb, STATUS_IDENT_OFFSET);
 393
 394   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, ENC_BIG_ENDIAN);
 395   proto_tree_add_uint_format_value(parameter_tree, hf_status_id,  parameter_tvb, STATUS_IDENT_OFFSET, STATUS_IDENT_LENGTH,
 396                              status_id, "%u (%s)", status_id,
 397                              val_to_str_const(status_type * 256 * 256 + status_id, support_IG?status_type_id_ig_values:status_type_id_values, "unknown"));
 398
 399   proto_item_append_text(parameter_item, " (%s)",
 400                          val_to_str_const(status_type * 256 * 256 + status_id, support_IG?status_type_id_ig_values:status_type_id_values, "unknown status information"));
 401 }
 402
 403 #define PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
 404
 405 static void
 406 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, proto_item *parameter_item, packet_info *pinfo, proto_tree *tree)
 407 {
 408   uint16_t protocol_data_length;
 409   tvbuff_t *protocol_data_tvb;
 410
 411   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 412   protocol_data_tvb    = tvb_new_subset_length(parameter_tvb, PROTOCOL_DATA_OFFSET, protocol_data_length);
 413   proto_item_append_text(parameter_item, " (%u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 414
 415   if(sapi_val_assigned == false)
 416   {
 417     return;
 418   }
 419   if(global_iua_gsm_sapis) {
 420     if (!dissector_try_uint(lapd_gsm_sapi_dissector_table, sapi_val, protocol_data_tvb, pinfo, tree))
 421       call_data_dissector(protocol_data_tvb, pinfo, tree);
 422     return;
 423   }
 424
 425   switch(sapi_val)
 426   {
 427     case SAPI_VAL_CALL_CONTROL:
 428     case SAPI_VAL_Q931_PACKET:
 429       call_dissector(q931_handle, protocol_data_tvb, pinfo, tree);
 430       break;
 431
 432     case SAPI_VAL_X25:
 433       call_dissector(x25_handle, protocol_data_tvb, pinfo, tree);
 434       break;
 435
 436     default:
 437       break;
 438   }
 439 }
 440
 441 #define RELEASE_MGMT_REASON   0
 442 #define RELEASE_PHYS_REASON   1
 443 #define RELEASE_DM_REASON     2
 444 #define RELEASE_OTHER_REASON  3
 445
 446 static const value_string release_reason_values[] = {
 447   { RELEASE_MGMT_REASON,  "Management layer generated release" },
 448   { RELEASE_PHYS_REASON,  "Physical layer alarm generated release" },
 449   { RELEASE_DM_REASON,    "Layer 2 should release" },
 450   { RELEASE_OTHER_REASON, "Other reason" },
 451   { 0,                    NULL } };
 452
 453 #define RELEASE_REASON_OFFSET PARAMETER_VALUE_OFFSET
 454 #define RELEASE_REASON_LENGTH 4
 455
 456 static void
 457 dissect_release_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 458 {
 459   proto_tree_add_item(parameter_tree, hf_release_reason, parameter_tvb, RELEASE_REASON_OFFSET, RELEASE_REASON_LENGTH, ENC_BIG_ENDIAN);
 460   proto_item_append_text(parameter_item, " (%s)",
 461                          val_to_str_const(tvb_get_ntohl(parameter_tvb, RELEASE_REASON_OFFSET), release_reason_values, "unknown"));
 462 }
 463
 464 #define TEI_STATUS_ASSIGNED       0
 465 #define TEI_STATUS_UNASSIGNED     1
 466
 467 static const value_string tei_status_values[] = {
 468   { TEI_STATUS_ASSIGNED,   "TEI is considered assigned by Q.921" },
 469   { TEI_STATUS_UNASSIGNED, "TEI is considered unassigned by Q.921" },
 470   { 0,                    NULL } };
 471
 472 #define TEI_STATUS_LENGTH 4
 473 #define TEI_STATUS_OFFSET PARAMETER_VALUE_OFFSET
 474
 475 static void
 476 dissect_tei_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 477 {
 478   proto_tree_add_item(parameter_tree, hf_tei_status, parameter_tvb, TEI_STATUS_OFFSET, TEI_STATUS_LENGTH, ENC_BIG_ENDIAN);
 479   proto_item_append_text(parameter_item, " (%s)",
 480                       val_to_str_const(tvb_get_ntohl(parameter_tvb, TEI_STATUS_OFFSET), tei_status_values, "unknown"));
 481 }
 482
 483 #define ASP_ID_LENGTH 4
 484 #define ASP_ID_OFFSET PARAMETER_VALUE_OFFSET
 485
 486 static void
 487 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 488 {
 489   proto_tree_add_item(parameter_tree, hf_asp_id, parameter_tvb, ASP_ID_OFFSET, ASP_ID_LENGTH, ENC_BIG_ENDIAN);
 490   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_ID_OFFSET));
 491 }
 492
 493 static void
 494 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 495 {
 496   uint16_t parameter_value_length;
 497
 498   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 499   if (parameter_value_length > 0)
 500     proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, ENC_NA);
 501   proto_item_append_text(parameter_item, " with tag %u and %u byte%s value",
 502                          tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET), parameter_value_length, plurality(parameter_value_length, "", "s"));
 503 }
 504
 505 #define INT_INTERFACE_IDENTIFIER_PARAMETER_TAG           0x01
 506 #define TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG          0x03
 507 #define INFO_PARAMETER_TAG                               0x04
 508 #define DLCI_PARAMETER_TAG                               0x05
 509 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG             0x07
 510 #define INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG 0x08
 511 #define HEARTBEAT_DATA_PARAMETER_TAG                     0x09
 512 #define ASP_REASON_PARAMETER_TAG                         0x0a
 513 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG                  0x0b
 514 #define ERROR_CODE_PARAMETER_TAG                         0x0c
 515 #define STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG        0x0d
 516 #define PROTOCOL_DATA_PARAMETER_TAG                      0x0e
 517 #define RELEASE_REASON_PARAMETER_TAG                     0x0f
 518 #define TEI_STATUS_PARAMETER_TAG                         0x10
 519 #define ASP_IDENTIFIER_PARAMETER_TAG                     0x11
 520
 521 static const value_string parameter_tag_values[] = {
 522   { INT_INTERFACE_IDENTIFIER_PARAMETER_TAG,                "Integer interface identifier" },
 523   { TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG,               "Text interface identifier" },
 524   { INFO_PARAMETER_TAG,                                    "Info" },
 525   { DLCI_PARAMETER_TAG,                                    "DLCI" },
 526   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,                  "Diagnostic information" },
 527   { INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG,      "Integer range interface identifier" },
 528   { HEARTBEAT_DATA_PARAMETER_TAG,                          "Heartbeat data" },
 529   { ASP_REASON_PARAMETER_TAG,                              "Reason" },
 530   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,                       "Traffic mode type" },
 531   { ERROR_CODE_PARAMETER_TAG,                              "Error code" },
 532   { STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG,             "Status type/identification" },
 533   { PROTOCOL_DATA_PARAMETER_TAG,                           "Protocol data" },
 534   { RELEASE_REASON_PARAMETER_TAG,                          "Release Reason" },
 535   { TEI_STATUS_PARAMETER_TAG,                              "TEI status" },
 536   { 0,                           NULL } };
 537
 538 static const value_string parameter_tag_ig_values[] = {
 539   { INT_INTERFACE_IDENTIFIER_PARAMETER_TAG,                "Integer interface identifier" },
 540   { TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG,               "Text interface identifier" },
 541   { INFO_PARAMETER_TAG,                                    "Info" },
 542   { DLCI_PARAMETER_TAG,                                    "DLCI" },
 543   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,                  "Diagnostic information" },
 544   { INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG,      "Integer range interface identifier" },
 545   { HEARTBEAT_DATA_PARAMETER_TAG,                          "Heartbeat data" },
 546   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,                       "Traffic mode type" },
 547   { ERROR_CODE_PARAMETER_TAG,                              "Error code" },
 548   { STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG,             "Status type/identification" },
 549   { PROTOCOL_DATA_PARAMETER_TAG,                           "Protocol data" },
 550   { RELEASE_REASON_PARAMETER_TAG,                          "Release Reason" },
 551   { TEI_STATUS_PARAMETER_TAG,                              "TEI status" },
 552   { ASP_IDENTIFIER_PARAMETER_TAG,                          "ASP identifier"},
 553   { 0,                           NULL } };
 554
 555 static void
 556 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *iua_tree)
 557 {
 558   uint16_t tag, length, padding_length;
 559   proto_item *parameter_item;
 560   proto_tree *parameter_tree;
 561
 562   /* extract tag and length from the parameter */
 563   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
 564   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 565   padding_length = tvb_reported_length(parameter_tvb) - length;
 566
 567   /* create proto_tree stuff */
 568   parameter_tree   = proto_tree_add_subtree_format(iua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, -1, ett_iua_parameter, &parameter_item,
 569                                          "%s parameter", val_to_str_const(tag, support_IG?parameter_tag_ig_values:parameter_tag_values, "Unknown"));
 570
 571   /* add tag and length to the iua tree */
 572   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);
 573   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, ENC_BIG_ENDIAN);
 574
 575   switch(tag) {
 576   case INT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
 577     dissect_int_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
 578     break;
 579   case TEXT_INTERFACE_IDENTIFIER_PARAMETER_TAG:
 580     dissect_text_interface_identifier_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
 581     break;
 582   case INFO_PARAMETER_TAG:
 583     dissect_info_string_parameter(parameter_tvb, pinfo, parameter_tree, parameter_item);
 584     break;
 585   case DLCI_PARAMETER_TAG:
 586     dissect_dlci_parameter(parameter_tvb, parameter_tree);
 587     break;
 588   case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
 589     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
 590     break;
 591   case INTEGER_RANGE_INTERFACE_IDENTIFIER_PARAMETER_TAG:
 592     dissect_integer_range_interface_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
 593     break;
 594   case HEARTBEAT_DATA_PARAMETER_TAG:
 595     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
 596     break;
 597   case ASP_REASON_PARAMETER_TAG:
 598     if (support_IG)
 599       dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
 600     else
 601       dissect_asp_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
 602     break;
 603   case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
 604     dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
 605     break;
 606   case ERROR_CODE_PARAMETER_TAG:
 607     dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
 608     break;
 609   case STATUS_TYPE_INDENTIFICATION_PARAMETER_TAG:
 610     dissect_status_type_identification_parameter(parameter_tvb, parameter_tree, parameter_item);
 611     break;
 612   case PROTOCOL_DATA_PARAMETER_TAG:
 613     dissect_protocol_data_parameter(parameter_tvb, parameter_item, pinfo, tree);
 614     break;
 615   case RELEASE_REASON_PARAMETER_TAG:
 616     dissect_release_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
 617     break;
 618   case TEI_STATUS_PARAMETER_TAG:
 619     dissect_tei_status_parameter(parameter_tvb, parameter_tree, parameter_item);
 620     break;
 621   case ASP_IDENTIFIER_PARAMETER_TAG:
 622     if (support_IG)
 623       dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
 624     else
 625       dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
 626     break;
 627   default:
 628     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
 629     break;
 630   };
 631
 632   if (padding_length > 0)
 633     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, ENC_NA);
 634 }
 635
 636 static void
 637 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *iua_tree)
 638 {
 639   int offset, length, total_length, remaining_length;
 640   tvbuff_t *parameter_tvb;
 641
 642   offset = 0;
 643   while((remaining_length = tvb_reported_length_remaining(parameters_tvb, offset))) {
 644     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
 645     total_length = WS_ROUNDUP_4(length);
 646     if (remaining_length >= length)
 647       total_length = MIN(total_length, remaining_length);
 648     /* create a tvb for the parameter including the padding bytes */
 649     parameter_tvb  = tvb_new_subset_length(parameters_tvb, offset, total_length);
 650     dissect_parameter(parameter_tvb, pinfo, tree, iua_tree);
 651     /* get rid of the handled parameter */
 652     offset += total_length;
 653   }
 654 }
 655
 656 #define VERSION_LENGTH         1
 657 #define RESERVED_LENGTH        1
 658 #define MESSAGE_CLASS_LENGTH   1
 659 #define MESSAGE_TYPE_LENGTH    1
 660 #define MESSAGE_LENGTH_LENGTH  4
 661 #define COMMON_HEADER_LENGTH   (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
 662                                 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
 663
 664 #define COMMON_HEADER_OFFSET   0
 665 #define VERSION_OFFSET         COMMON_HEADER_OFFSET
 666 #define RESERVED_OFFSET        (VERSION_OFFSET + VERSION_LENGTH)
 667 #define MESSAGE_CLASS_OFFSET   (RESERVED_OFFSET + RESERVED_LENGTH)
 668 #define MESSAGE_TYPE_OFFSET    (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
 669 #define MESSAGE_LENGTH_OFFSET  (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
 670 #define PARAMETERS_OFFSET      (COMMON_HEADER_OFFSET + COMMON_HEADER_LENGTH)
 671
 672 #define PROTOCOL_VERSION_RELEASE_1             1
 673
 674 static const value_string protocol_version_values[] = {
 675   { PROTOCOL_VERSION_RELEASE_1,  "Release 1" },
 676   { 0,                           NULL } };
 677
 678 #define MESSAGE_CLASS_MGMT_MESSAGE        0
 679 #define MESSAGE_CLASS_TFER_MESSAGE        1
 680 #define MESSAGE_CLASS_SSNM_MESSAGE        2
 681 #define MESSAGE_CLASS_ASPSM_MESSAGE       3
 682 #define MESSAGE_CLASS_ASPTM_MESSAGE       4
 683 #define MESSAGE_CLASS_QPTM_MESSAGE        5
 684 #define MESSAGE_CLASS_MAUP_MESSAGE        6
 685 #define MESSAGE_CLASS_CL_SUA_MESSAGE      7
 686 #define MESSAGE_CLASS_CO_SUA_MESSAGE      8
 687
 688 static const value_string message_class_values[] = {
 689   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
 690   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
 691   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
 692   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
 693   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
 694   { MESSAGE_CLASS_QPTM_MESSAGE,   "Q.921/Q.931 boundary primitive transport messages" },
 695   { MESSAGE_CLASS_MAUP_MESSAGE,   "MTP2 user adaptation messages" },
 696   { MESSAGE_CLASS_CL_SUA_MESSAGE, "Connectionless messages (SUA)" },
 697   { MESSAGE_CLASS_CO_SUA_MESSAGE, "Connection-oriented messages (SUA)" },
 698   { 0,                             NULL } };
 699
 700 /* message types for MGMT messages */
 701 #define MESSAGE_TYPE_ERR                  0
 702 #define MESSAGE_TYPE_NTFY                 1
 703 #define MESSAGE_TYPE_TEI_STATUS_REQ       2
 704 #define MESSAGE_TYPE_TEI_STATUS_CON       3
 705 #define MESSAGE_TYPE_TEI_STATUS_IND       4
 706 #define MESSAGE_TYPE_TEI_QUERY_REQ        5
 707
 708 /* message types for ASPSM messages */
 709 #define MESSAGE_TYPE_UP                   1
 710 #define MESSAGE_TYPE_DOWN                 2
 711 #define MESSAGE_TYPE_BEAT                 3
 712 #define MESSAGE_TYPE_UP_ACK               4
 713 #define MESSAGE_TYPE_DOWN_ACK             5
 714 #define MESSAGE_TYPE_BEAT_ACK             6
 715
 716 /* message types for ASPTM messages */
 717 #define MESSAGE_TYPE_ACTIVE               1
 718 #define MESSAGE_TYPE_INACTIVE             2
 719 #define MESSAGE_TYPE_ACTIVE_ACK           3
 720 #define MESSAGE_TYPE_INACTIVE_ACK         4
 721
 722 /* message types for QPTM messages */
 723 #define MESSAGE_TYPE_DATA_REQUEST         1
 724 #define MESSAGE_TYPE_DATA_INDICATION      2
 725 #define MESSAGE_TYPE_UNIT_DATA_REQUEST    3
 726 #define MESSAGE_TYPE_UNIT_DATA_INDICATION 4
 727 #define MESSAGE_TYPE_ESTABLISH_REQUEST    5
 728 #define MESSAGE_TYPE_ESTABLISH_CONFIRM    6
 729 #define MESSAGE_TYPE_ESTABLISH_INDICATION 7
 730 #define MESSAGE_TYPE_RELEASE_REQUEST      8
 731 #define MESSAGE_TYPE_RELEASE_CONFIRM      9
 732 #define MESSAGE_TYPE_RELEASE_INDICATION  10
 733
 734
 735 static const value_string message_class_type_values[] = {
 736   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,                  "Error" },
 737   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,                 "Notify" },
 738   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_REQ,       "TEI status request" },
 739   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_CON,       "TEI status confirmation" },
 740   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_IND,       "TEI status indication" },
 741   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,                   "ASP up" },
 742   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,                 "ASP down" },
 743   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,                 "Heartbeat" },
 744   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,               "ASP up ack" },
 745   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,             "ASP down ack" },
 746   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,             "Heartbeat ack" },
 747   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,              "ASP active" },
 748   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,            "ASP inactive" },
 749   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,          "ASP active ack" },
 750   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK ,        "ASP inactive ack" },
 751   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_REQUEST,         "Data request" },
 752   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_INDICATION,      "Data indication" },
 753   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST,    "Unit data request" },
 754   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "Unit data indication" },
 755   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST,    "Establish request" },
 756   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM,    "Establish confirmation" },
 757   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "Establish indication" },
 758   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_REQUEST,      "Release request" },
 759   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_CONFIRM,      "Release confirmation" },
 760   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_INDICATION,   "Release indication" },
 761   { 0,                                                                     NULL } };
 762
 763 static const value_string message_class_type_ig_values[] = {
 764   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,                  "Error" },
 765   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,                 "Notify" },
 766   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_REQ,       "TEI status request" },
 767   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_CON,       "TEI status confirmation" },
 768   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_IND,       "TEI status indication" },
 769   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_QUERY_REQ,        "TEI query request" },
 770   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,                   "ASP up" },
 771   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,                 "ASP down" },
 772   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,                 "Heartbeat" },
 773   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,               "ASP up ack" },
 774   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,             "ASP down ack" },
 775   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,             "Heartbeat ack" },
 776   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,              "ASP active" },
 777   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,            "ASP inactive" },
 778   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,          "ASP active ack" },
 779   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK ,        "ASP inactive ack" },
 780   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_REQUEST,         "Data request" },
 781   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_INDICATION,      "Data indication" },
 782   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST,    "Unit data request" },
 783   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "Unit data indication" },
 784   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST,    "Establish request" },
 785   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM,    "Establish confirmation" },
 786   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "Establish indication" },
 787   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_REQUEST,      "Release request" },
 788   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_CONFIRM,      "Release confirmation" },
 789   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_INDICATION,   "Release indication" },
 790   { 0,                                                                     NULL } };
 791
 792 static const value_string message_class_type_acro_values[] = {
 793   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,                  "ERR" },
 794   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,                 "NTFY" },
 795   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_REQ,       "TEI_STAT_REQ" },
 796   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_CON,       "TEI_STAT_CON" },
 797   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_IND,       "TEI_STAT_IND" },
 798   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,                   "ASP_UP" },
 799   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,                 "ASP_DOWN" },
 800   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,                 "BEAT" },
 801   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,               "ASP_UP_ACK" },
 802   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,             "ASP_DOWN_ACK" },
 803   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,             "BEAT_ACK" },
 804   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,              "ASP_ACTIVE" },
 805   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,            "ASP_INACTIVE" },
 806   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,          "ASP_ACTIVE_ACK" },
 807   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK ,        "ASP_INACTIVE_ACK" },
 808   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_REQUEST,         "DATA_REQ" },
 809   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_INDICATION,      "DATA_IND" },
 810   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST,    "U_DATA_REQ" },
 811   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "U_DATA_IND" },
 812   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST,    "EST_REQ" },
 813   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM,    "EST_CON" },
 814   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "EST_IND" },
 815   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_REQUEST,      "REL_REQ" },
 816   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_CONFIRM,      "REL_CON" },
 817   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_INDICATION,   "REL_IND" },
 818   { 0,                                                                     NULL } };
 819
 820 static const value_string message_class_type_acro_ig_values[] = {
 821   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,                  "ERR" },
 822   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,                 "NTFY" },
 823   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_REQ,       "TEI_STAT_REQ" },
 824   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_CON,       "TEI_STAT_CON" },
 825   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_STATUS_IND,       "TEI_STAT_IND" },
 826   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_TEI_QUERY_REQ,        "TEI_QUERY_REQ" },
 827   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,                   "ASP_UP" },
 828   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,                 "ASP_DOWN" },
 829   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,                 "BEAT" },
 830   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,               "ASP_UP_ACK" },
 831   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,             "ASP_DOWN_ACK" },
 832   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,             "BEAT_ACK" },
 833   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,              "ASP_ACTIVE" },
 834   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,            "ASP_INACTIVE" },
 835   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,          "ASP_ACTIVE_ACK" },
 836   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK ,        "ASP_INACTIVE_ACK" },
 837   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_REQUEST,         "DATA_REQ" },
 838   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_DATA_INDICATION,      "DATA_IND" },
 839   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_REQUEST,    "U_DATA_REQ" },
 840   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_UNIT_DATA_INDICATION, "U_DATA_IND" },
 841   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_REQUEST,    "EST_REQ" },
 842   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_CONFIRM,    "EST_CON" },
 843   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_ESTABLISH_INDICATION, "EST_IND" },
 844   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_REQUEST,      "REL_REQ" },
 845   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_CONFIRM,      "REL_CON" },
 846   { MESSAGE_CLASS_QPTM_MESSAGE  * 256 + MESSAGE_TYPE_RELEASE_INDICATION,   "REL_IND" },
 847   { 0,                                                                     NULL } };
 848
 849 static void
 850 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *iua_tree)
 851 {
 852   uint8_t message_class, message_type;
 853
 854   message_class  = tvb_get_uint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 855   message_type   = tvb_get_uint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 856
 857   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"));
 858
 859   if (iua_tree) {
 860     /* add the components of the common header to the protocol tree */
 861     proto_tree_add_item(iua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, ENC_BIG_ENDIAN);
 862     proto_tree_add_item(iua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, ENC_BIG_ENDIAN);
 863     proto_tree_add_item(iua_tree, hf_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, ENC_BIG_ENDIAN);
 864     proto_tree_add_uint_format_value(iua_tree, hf_message_type,
 865                                common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH,
 866                                message_type, "%u (%s)",
 867                                message_type, val_to_str_const(message_class * 256 + message_type, support_IG?message_class_type_ig_values:message_class_type_values, "reserved"));
 868     proto_tree_add_item(iua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, ENC_BIG_ENDIAN);
 869   }
 870 }
 871
 872 static void
 873 dissect_iua_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *iua_tree)
 874 {
 875   tvbuff_t *common_header_tvb, *parameters_tvb;
 876
 877   sapi_val_assigned = false;
 878
 879   common_header_tvb = tvb_new_subset_length(message_tvb, COMMON_HEADER_OFFSET, COMMON_HEADER_LENGTH);
 880   parameters_tvb    = tvb_new_subset_remaining(message_tvb, PARAMETERS_OFFSET);
 881   dissect_common_header(common_header_tvb, pinfo, iua_tree);
 882   dissect_parameters(parameters_tvb, pinfo, tree, iua_tree);
 883 }
 884
 885 static int
 886 dissect_iua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
 887 {
 888   proto_item *iua_item;
 889   proto_tree *iua_tree;
 890
 891   /* make entry in the Protocol column on summary display */
 892
 893   col_set_str(pinfo->cinfo, COL_PROTOCOL, support_IG?"IUA (RFC 3057 + IG)":"IUA (RFC 3057)");
 894
 895   /* create the m3ua protocol tree */
 896   iua_item = proto_tree_add_item(tree, proto_iua, message_tvb, 0, -1, ENC_NA);
 897   iua_tree = proto_item_add_subtree(iua_item, ett_iua);
 898
 899   /* dissect the message */
 900   dissect_iua_message(message_tvb, pinfo, tree, iua_tree);
 901   return tvb_captured_length(message_tvb);
 902 }
 903
 904 /* Register the protocol with Wireshark */
 905 void
 906 proto_register_iua(void)
 907 {
 908
 909   /* Setup list of header fields */
 910   static hf_register_info hf[] = {
 911     { &hf_int_interface_id,      { "Integer interface identifier", "iua.int_interface_identifier",  FT_UINT32,  BASE_HEX,  NULL,                           0x0,            NULL, HFILL } },
 912     { &hf_text_interface_id,     { "Text interface identifier",    "iua.text_interface_identifier", FT_STRING,  BASE_NONE, NULL,                           0x0,            NULL, HFILL } },
 913     { &hf_info_string,           { "Info string",                  "iua.info_string",               FT_STRING,  BASE_NONE, NULL,                           0x0,            NULL, HFILL } },
 914     { &hf_dlci_zero_bit,         { "Zero bit",                     "iua.dlci_zero_bit",             FT_BOOLEAN, 8,         NULL,                           ZERO_BIT_MASK,  NULL, HFILL } },
 915     { &hf_dlci_spare_bit,        { "Spare bit",                    "iua.dlci_spare_bit",            FT_BOOLEAN, 8,         NULL,                           SPARE_BIT_MASK, NULL, HFILL } },
 916     { &hf_dlci_sapi,             { "SAPI",                         "iua.dlci_sapi",                 FT_UINT8,   BASE_HEX,  VALS(sapi_values),              SAPI_MASK,      NULL, HFILL } },
 917     { &hf_dlci_gsm_sapi,             { "SAPI",                     "iua.dlci_gsm_sapi",             FT_UINT8,   BASE_HEX,  VALS(gsm_sapi_vals),            SAPI_MASK,      NULL, HFILL } },
 918     { &hf_dlci_one_bit,          { "One bit",                      "iua.dlci_one_bit",              FT_BOOLEAN, 8,         NULL,                           ONE_BIT_MASK,   NULL, HFILL } },
 919     { &hf_dlci_tei,              { "TEI",                          "iua.dlci_tei",                  FT_UINT8,   BASE_HEX,  NULL,                           TEI_MASK,       NULL, HFILL } },
 920     { &hf_dlci_spare,            { "Spare",                        "iua.dlci_spare",                FT_UINT16,  BASE_HEX,  NULL,                           0x0,            NULL, HFILL } },
 921     { &hf_diag_info,             { "Diagnostic information",       "iua.diagnostic_information",    FT_BYTES,   BASE_NONE, NULL,                           0x0,            NULL, HFILL } },
 922     { &hf_interface_range_start, { "Start",                        "iua.interface_range_start",     FT_UINT32,  BASE_DEC,  NULL,                           0x0,            NULL, HFILL } },
 923     { &hf_interface_range_end,   { "End",                          "iua.interface_range_end",       FT_UINT32,  BASE_DEC,  NULL,                           0x0,            NULL, HFILL } },
 924     { &hf_heartbeat_data,        { "Heartbeat data",               "iua.heartbeat_data",            FT_BYTES,   BASE_NONE, NULL,                           0x0,            NULL, HFILL } },
 925     { &hf_asp_reason,            { "Reason",                       "iua.asp_reason",                FT_UINT32,  BASE_HEX,  VALS(asp_reason_values),        0x0,            NULL, HFILL } },
 926     { &hf_traffic_mode_type,     { "Traffic mode type",            "iua.traffic_mode_type",         FT_UINT32,  BASE_HEX,  VALS(traffic_mode_type_values), 0x0,            NULL, HFILL } },
 927     { &hf_error_code,            { "Error code",                   "iua.error_code",                FT_UINT32,  BASE_DEC,  VALS(error_code_values),        0x0,            NULL, HFILL } },
 928     { &hf_error_code_ig,         { "Error code",                   "iua.error_code",                FT_UINT32,  BASE_DEC,  VALS(error_code_ig_values),     0x0,            NULL, HFILL } },
 929     { &hf_status_type,           { "Status type",                  "iua.status_type",               FT_UINT16,  BASE_DEC,  VALS(status_type_values),       0x0,            NULL, HFILL } },
 930     { &hf_status_id,             { "Status identification",        "iua.status_identification",     FT_UINT16,  BASE_DEC,  NULL,                           0x0,            NULL, HFILL } },
 931     { &hf_release_reason,        { "Reason",                       "iua.release_reason",            FT_UINT32,  BASE_HEX,  VALS(release_reason_values),    0x0,            NULL, HFILL } },
 932     { &hf_tei_status,            { "TEI status",                   "iua.tei_status",                FT_UINT32,  BASE_HEX,  VALS(tei_status_values),        0x0,            NULL, HFILL } },
 933     { &hf_asp_id,                { "ASP identifier",               "iua.asp_identifier",            FT_UINT32,  BASE_HEX,  NULL,                           0x0,            NULL, HFILL } },
 934     { &hf_parameter_tag,         { "Parameter Tag",                "iua.parameter_tag",             FT_UINT16,  BASE_DEC,  VALS(parameter_tag_values),     0x0,            NULL, HFILL } },
 935     { &hf_parameter_tag_ig,      { "Parameter Tag",                "iua.parameter_tag",             FT_UINT16,  BASE_DEC,  VALS(parameter_tag_ig_values),  0x0,            NULL, HFILL } },
 936     { &hf_parameter_length,      { "Parameter length",             "iua.parameter_length",          FT_UINT16,  BASE_DEC,  NULL,                           0x0,            NULL, HFILL } },
 937     { &hf_parameter_value,       { "Parameter value",              "iua.parameter_value",           FT_BYTES,   BASE_NONE, NULL,                           0x0,            NULL, HFILL } },
 938     { &hf_parameter_padding,     { "Parameter padding",            "iua.parameter_padding",         FT_BYTES,   BASE_NONE, NULL,                           0x0,            NULL, HFILL } },
 939     { &hf_version,               { "Version",                      "iua.version",                   FT_UINT8,   BASE_DEC,  VALS(protocol_version_values),  0x0,            NULL, HFILL } },
 940     { &hf_reserved,              { "Reserved",                     "iua.reserved",                  FT_UINT8,   BASE_HEX,  NULL,                           0x0,            NULL, HFILL } },
 941     { &hf_message_class,         { "Message class",                "iua.message_class",             FT_UINT8,   BASE_DEC,  VALS(message_class_values),     0x0,            NULL, HFILL } },
 942     { &hf_message_type,          { "Message Type",                 "iua.message_type",              FT_UINT8,   BASE_DEC,  NULL,                           0x0,            NULL, HFILL } },
 943     { &hf_message_length,        { "Message length",               "iua.message_length",            FT_UINT32,  BASE_DEC,  NULL,                           0x0,            NULL, HFILL } },
 944    };
 945   /* Setup protocol subtree array */
 946   static int *ett[] = {
 947     &ett_iua,
 948     &ett_iua_parameter,
 949   };
 950
 951   /* Register the protocol name and description */
 952   proto_iua = proto_register_protocol("ISDN Q.921-User Adaptation Layer", "IUA", "iua");
 953   iua_module = prefs_register_protocol(proto_iua, NULL);
 954
 955   /* Required function calls to register the header fields and subtrees used */
 956   proto_register_field_array(proto_iua, hf, array_length(hf));
 957   proto_register_subtree_array(ett, array_length(ett));
 958   prefs_register_bool_preference(iua_module, "support_ig", "Support Implementers Guide", "Support Implementers Guide (version 01)", &support_IG);
 959
 960   prefs_register_bool_preference(iua_module, "use_gsm_sapi_values",
 961         "Use GSM SAPI values",
 962         "Use SAPI values as specified in TS 48 056",
 963         &global_iua_gsm_sapis);
 964
 965   /* Allow other dissectors to find this one by name. */
 966   iua_handle = register_dissector("iua", dissect_iua, proto_iua);
 967 }
 968
 969 #define SCTP_PORT_IUA          9900
 970
 971 void
 972 proto_reg_handoff_iua(void)
 973 {
 974   q931_handle = find_dissector_add_dependency("q931", proto_iua);
 975   x25_handle  = find_dissector_add_dependency("x.25", proto_iua);
 976
 977   dissector_add_uint("sctp.port", SCTP_PORT_IUA,           iua_handle);
 978   dissector_add_uint("sctp.ppi",  IUA_PAYLOAD_PROTOCOL_ID, iua_handle);
 979
 980   lapd_gsm_sapi_dissector_table = find_dissector_table("lapd.gsm.sapi");
 981 }
 982
 983 /*
 984  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
 985  *
 986  * Local Variables:
 987  * c-basic-offset: 2
 988  * tab-width: 8
 989  * indent-tabs-mode: nil
 990  * End:
 991  *
 992  * ex: set shiftwidth=2 tabstop=8 expandtab:
 993  * :indentSize=2:tabSize=8:noTabs=true:
 994  */