epan/dissectors/packet-m3ua.c

   1 /* packet-m3ua.c
   2  * Routines for MTP3 User Adaptation Layer dissection
   3  * It is hopefully (needs testing) compilant to
   4  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-05.txt (expired)
   5  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-06.txt (expired)
   6  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-07.txt (expired)
   7  * http://www.ietf.org/rfc/rfc3332.txt
   8  *
   9  * Copyright 2000, 2001, 2002, 2003, 2004 Michael Tuexen <tuexen [AT] fh-muenster.de>
  10  *
  11  * $Id$
  12  *
  13  * Ethereal - Network traffic analyzer
  14  * By Gerald Combs <gerald@ethereal.com>
  15  * Copyright 1998 Gerald Combs
  16  *
  17  * Copied from README.developer
  18  *
  19  * This program is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU General Public License
  21  * as published by the Free Software Foundation; either version 2
  22  * of the License, or (at your option) any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU General Public License
  30  * along with this program; if not, write to the Free Software
  31  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 # include "config.h"
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40
  41
  42 #include <string.h>
  43 #include <glib.h>
  44
  45 #include <epan/packet.h>
  46 #include <epan/prefs.h>
  47 #include "sctpppids.h"
  48 #include "packet-mtp3.h"
  49
  50 #define SCTP_PORT_M3UA         2905
  51 #define NETWORK_BYTE_ORDER     FALSE
  52 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
  53
  54 #define VERSION_LENGTH         1
  55 #define RESERVED_LENGTH        1
  56 #define MESSAGE_CLASS_LENGTH   1
  57 #define MESSAGE_TYPE_LENGTH    1
  58 #define MESSAGE_LENGTH_LENGTH  4
  59 #define COMMON_HEADER_LENGTH   (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
  60                                 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
  61
  62 #define VERSION_OFFSET         0
  63 #define RESERVED_OFFSET        (VERSION_OFFSET + VERSION_LENGTH)
  64 #define MESSAGE_CLASS_OFFSET   (RESERVED_OFFSET + RESERVED_LENGTH)
  65 #define MESSAGE_TYPE_OFFSET    (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
  66 #define MESSAGE_LENGTH_OFFSET  (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
  67
  68 #define PARAMETER_TAG_LENGTH    2
  69 #define PARAMETER_LENGTH_LENGTH 2
  70 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
  71
  72 #define PARAMETER_TAG_OFFSET    0
  73 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
  74 #define PARAMETER_VALUE_OFFSET  (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
  75 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
  76
  77 #define PROTOCOL_VERSION_RELEASE_1             1
  78
  79 static const value_string protocol_version_values[] = {
  80   { PROTOCOL_VERSION_RELEASE_1,  "Release 1" },
  81   { 0,                           NULL } };
  82
  83 #define MESSAGE_CLASS_MGMT_MESSAGE        0
  84 #define MESSAGE_CLASS_TFER_MESSAGE        1
  85 #define MESSAGE_CLASS_SSNM_MESSAGE        2
  86 #define MESSAGE_CLASS_ASPSM_MESSAGE       3
  87 #define MESSAGE_CLASS_ASPTM_MESSAGE       4
  88 #define MESSAGE_CLASS_RKM_MESSAGE         9
  89
  90 static const value_string message_class_values[] = {
  91   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
  92   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
  93   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
  94   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
  95   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
  96   { MESSAGE_CLASS_RKM_MESSAGE,    "Routing key management messages" },
  97   { 0,                           NULL } };
  98
  99 static const value_string v5_message_class_values[] = {
 100   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
 101   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
 102   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
 103   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
 104   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
 105   { 0,                           NULL } };
 106
 107 #define MESSAGE_TYPE_ERR                  0
 108 #define MESSAGE_TYPE_NTFY                 1
 109
 110 #define MESSAGE_TYPE_DATA                 1
 111
 112 #define MESSAGE_TYPE_DUNA                 1
 113 #define MESSAGE_TYPE_DAVA                 2
 114 #define MESSAGE_TYPE_DAUD                 3
 115 #define MESSAGE_TYPE_SCON                 4
 116 #define MESSAGE_TYPE_DUPU                 5
 117 #define MESSAGE_TYPE_DRST                 6
 118
 119 #define MESSAGE_TYPE_UP                   1
 120 #define MESSAGE_TYPE_DOWN                 2
 121 #define MESSAGE_TYPE_BEAT                 3
 122 #define MESSAGE_TYPE_UP_ACK               4
 123 #define MESSAGE_TYPE_DOWN_ACK             5
 124 #define MESSAGE_TYPE_BEAT_ACK             6
 125
 126 #define MESSAGE_TYPE_ACTIVE               1
 127 #define MESSAGE_TYPE_INACTIVE             2
 128 #define MESSAGE_TYPE_ACTIVE_ACK           3
 129 #define MESSAGE_TYPE_INACTIVE_ACK         4
 130
 131 #define MESSAGE_TYPE_REG_REQ              1
 132 #define MESSAGE_TYPE_REG_RSP              2
 133 #define MESSAGE_TYPE_DEREG_REQ            3
 134 #define MESSAGE_TYPE_DEREG_RSP            4
 135
 136 static const value_string v5_message_class_type_values[] = {
 137   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 138   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 139   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 140   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 141   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 142   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 143   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 144   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 145   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (UP)" },
 146   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (DOWN)" },
 147   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 148   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (UP ACK)" },
 149   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (DOWN ACK)" },
 150   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT ACK)" },
 151   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ACTIVE)" },
 152   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (INACTIVE)" },
 153   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ACTIVE ACK)" },
 154   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (INACTIVE ACK)" },
 155   { 0,                                                              NULL } };
 156
 157 static const value_string message_class_type_values[] = {
 158   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 159   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 160   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 161   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 162   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 163   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 164   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 165   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 166   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "Destination Restricted (DRST)" },
 167   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (ASPUP)" },
 168   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (ASPDN)" },
 169   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 170   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (ASPUP_ACK)" },
 171   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (ASPDN_ACK)" },
 172   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT_ACK)" },
 173   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ASPAC)" },
 174   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (ASPIA)" },
 175   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ASPAC_ACK)" },
 176   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (ASPIA_ACK)" },
 177   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "Registration request (REG_REQ)" },
 178   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "Registration response (REG_RSP)" },
 179   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "Deregistration request (DEREG_REQ)" },
 180   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "Deregistration response (DEREG_RSP)" },
 181   { 0,                           NULL } };
 182
 183 static const value_string v5_message_class_type_acro_values[] = {
 184   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 185   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 186   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 187   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 188   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 189   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 190   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 191   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 192   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP_UP" },
 193   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP_DOWN" },
 194   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 195   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP_UP_ACK" },
 196   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP_DOWN_ACK" },
 197   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 198   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP_ACTIVE" },
 199   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP_INACTIVE" },
 200   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP_ACTIVE_ACK" },
 201   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
 202   { 0,                                                              NULL } };
 203
 204 static const value_string message_class_type_acro_values[] = {
 205   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 206   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 207   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 208   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 209   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 210   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 211   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 212   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 213   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "DRST" },
 214   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASPUP" },
 215   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASPDN" },
 216   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 217   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASPUP_ACK" },
 218   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASPDN_ACK" },
 219   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 220   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASPAC" },
 221   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASPIA" },
 222   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASPAC_ACK" },
 223   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASPIA_ACK" },
 224   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "REG_REQ" },
 225   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "REG_RSP" },
 226   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "DEREG_REQ" },
 227   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "DEREG_RSP" },
 228   { 0,                           NULL } };
 229
 230 /* Initialize the protocol and registered fields */
 231 static int proto_m3ua = -1;
 232 static int hf_version = -1;
 233 static int hf_reserved = -1;
 234 static int hf_message_class = -1;
 235 static int hf_v5_message_class = -1;
 236 static int hf_message_type = -1;
 237 static int hf_message_length = -1;
 238 static int hf_v5_parameter_tag = -1;
 239 static int hf_v6_parameter_tag = -1;
 240 static int hf_v7_parameter_tag = -1;
 241 static int hf_parameter_tag = -1;
 242 static int hf_parameter_length = -1;
 243 static int hf_parameter_value = -1;
 244 static int hf_parameter_padding = -1;
 245 static int hf_parameter_trailer = -1;
 246 static int hf_network_appearance = -1;
 247 static int hf_info_string = -1;
 248 static int hf_routing_context = -1;
 249 static int hf_diagnostic_information = -1;
 250 static int hf_heartbeat_data = -1;
 251 static int hf_v5_error_code = -1;
 252 static int hf_v6_error_code = -1;
 253 static int hf_v7_error_code = -1;
 254 static int hf_error_code = -1;
 255 static int hf_status_type = -1;
 256 static int hf_status_info = -1;
 257 static int hf_asp_identifier = -1;
 258 static int hf_affected_point_code_mask = -1;
 259 static int hf_affected_point_code_pc = -1;
 260 static int hf_cause = -1;
 261 static int hf_user = -1;
 262 static int hf_reason = -1;
 263 static int hf_v5_traffic_mode_type = -1;
 264 static int hf_v6_traffic_mode_type = -1;
 265 static int hf_v7_traffic_mode_type = -1;
 266 static int hf_traffic_mode_type = -1;
 267 static int hf_congestion_reserved = -1;
 268 static int hf_congestion_level = -1;
 269 static int hf_concerned_dest_reserved = -1;
 270 static int hf_concerned_dest_pc = -1;
 271 static int hf_local_rk_identifier = -1;
 272 static int hf_dpc_mask = -1;
 273 static int hf_dpc_pc = -1;
 274 static int hf_si = -1;
 275 static int hf_ssn = -1;
 276 static int hf_opc_list_mask = -1;
 277 static int hf_opc_list_pc = -1;
 278 static int hf_cic_range_mask = -1;
 279 static int hf_cic_range_pc = -1;
 280 static int hf_cic_range_upper = -1;
 281 static int hf_cic_range_lower = -1;
 282 static int hf_protocol_data_opc = -1;
 283 static int hf_protocol_data_dpc = -1;
 284 static int hf_protocol_data_si = -1;
 285 static int hf_protocol_data_ni = -1;
 286 static int hf_protocol_data_mp = -1;
 287 static int hf_protocol_data_sls = -1;
 288 static int hf_correlation_identifier = -1;
 289 static int hf_registration_status = -1;
 290 static int hf_deregistration_status = -1;
 291 static int hf_registration_result_identifier = -1;
 292 static int hf_registration_result_status = -1;
 293 static int hf_registration_result_context = -1;
 294 static int hf_v6_deregistration_result_status = -1;
 295 static int hf_v6_deregistration_result_context = -1;
 296 static int hf_li = -1;
 297
 298 /* Initialize the subtree pointers */
 299 static gint ett_m3ua = -1;
 300 static gint ett_parameter = -1;
 301
 302 static module_t *m3ua_module;
 303 static dissector_handle_t mtp3_handle, data_handle;
 304 static dissector_table_t si_dissector_table;
 305
 306 /* stuff for supporting multiple versions */
 307 typedef enum {
 308   M3UA_V5,
 309   M3UA_V6,
 310   M3UA_V7,
 311   M3UA_RFC
 312 } Version_Type;
 313
 314 static gint version = M3UA_RFC;
 315
 316 static void
 317 dissect_parameters(tvbuff_t *, packet_info *, proto_tree *, proto_tree *);
 318
 319 static void
 320 dissect_v5_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 321 {
 322   guint8  message_class, message_type;
 323
 324   /* Extract the common header */
 325   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 326   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 327
 328   if (check_col(pinfo->cinfo, COL_INFO))
 329     col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(message_class * 256 + message_type, v5_message_class_type_acro_values, "reserved"));
 330
 331   if (m3ua_tree) {
 332     /* add the components of the common header to the protocol tree */
 333     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 334     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 335     proto_tree_add_item(m3ua_tree, hf_v5_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 336     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 337                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, v5_message_class_type_values, "reserved"), message_type);
 338     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 339   }
 340 }
 341
 342 static void
 343 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 344 {
 345   guint8  message_class, message_type;
 346
 347   /* Extract the common header */
 348   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 349   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 350
 351   if (check_col(pinfo->cinfo, COL_INFO))
 352     col_add_fstr(pinfo->cinfo, COL_INFO,"%s ", val_to_str(message_class * 256 + message_type, message_class_type_acro_values, "reserved"));
 353
 354   if (m3ua_tree) {
 355     /* add the components of the common header to the protocol tree */
 356     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 357     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 358     proto_tree_add_item(m3ua_tree, hf_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 359     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 360                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, message_class_type_values, "reserved"), message_type);
 361     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 362   }
 363 }
 364
 365 #define NETWORK_APPEARANCE_LENGTH 4
 366 #define NETWORK_APPEARANCE_OFFSET PARAMETER_VALUE_OFFSET
 367
 368 static void
 369 dissect_network_appearance_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 370 {
 371   proto_tree_add_item(parameter_tree, hf_network_appearance, parameter_tvb, NETWORK_APPEARANCE_OFFSET, NETWORK_APPEARANCE_LENGTH, NETWORK_BYTE_ORDER);
 372   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, NETWORK_APPEARANCE_OFFSET));
 373 }
 374
 375 #define V5_PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
 376
 377 static void
 378 dissect_v5_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 379 {
 380   guint16 length, protocol_data_length;
 381   tvbuff_t *payload_tvb;
 382
 383   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 384   protocol_data_length = length - PARAMETER_HEADER_LENGTH;
 385   payload_tvb          = tvb_new_subset(parameter_tvb, V5_PROTOCOL_DATA_OFFSET, protocol_data_length, protocol_data_length);
 386   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 387   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 388   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 389 }
 390
 391 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
 392
 393 static void
 394 dissect_info_string_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 395 {
 396   guint16 info_string_length;
 397
 398   info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 399   proto_tree_add_item(parameter_tree, hf_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, NETWORK_BYTE_ORDER);
 400   proto_item_append_text(parameter_item, " (%.*s)", info_string_length,
 401                          (const char *)tvb_get_ptr(parameter_tvb, INFO_STRING_OFFSET, info_string_length));
 402 }
 403
 404 #define AFFECTED_MASK_LENGTH 1
 405 #define AFFECTED_DPC_LENGTH  3
 406 #define AFFECTED_DESTINATION_LENGTH (AFFECTED_MASK_LENGTH + AFFECTED_DPC_LENGTH)
 407
 408 #define AFFECTED_MASK_OFFSET 0
 409 #define AFFECTED_DPC_OFFSET  1
 410
 411 static void
 412 dissect_affected_destinations_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 413 {
 414   guint16 number_of_destinations, destination_number;
 415   gint destination_offset;
 416   proto_item *item;
 417
 418   number_of_destinations = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 419   destination_offset = PARAMETER_VALUE_OFFSET;
 420   for(destination_number=1; destination_number <= number_of_destinations; destination_number++) {
 421     proto_tree_add_item(parameter_tree, hf_affected_point_code_mask, parameter_tvb, destination_offset + AFFECTED_MASK_OFFSET, AFFECTED_MASK_LENGTH, NETWORK_BYTE_ORDER);
 422     item = proto_tree_add_item(parameter_tree, hf_affected_point_code_pc,   parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET,  AFFECTED_DPC_LENGTH,  NETWORK_BYTE_ORDER);
 423     if (mtp3_pc_structured())
 424       proto_item_append_text(item, " (%s)", mtp3_pc_to_str(tvb_get_ntoh24(parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET)));
 425     destination_offset += AFFECTED_DESTINATION_LENGTH;
 426   }
 427   proto_item_append_text(parameter_item, " (%u destination%s)", number_of_destinations, plurality(number_of_destinations, "", "s"));
 428 }
 429
 430 #define ROUTING_CONTEXT_LENGTH 4
 431
 432 static void
 433 dissect_routing_context_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 434 {
 435   guint16 number_of_contexts, context_number;
 436   gint context_offset;
 437
 438   number_of_contexts = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 439   context_offset = PARAMETER_VALUE_OFFSET;
 440   for(context_number=1; context_number <= number_of_contexts; context_number++) {
 441     proto_tree_add_item(parameter_tree, hf_routing_context, parameter_tvb, context_offset, ROUTING_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 442     context_offset += ROUTING_CONTEXT_LENGTH;
 443   };
 444   proto_item_append_text(parameter_item, " (%u context%s)", number_of_contexts, plurality(number_of_contexts, "", "s"));
 445 }
 446
 447 #define DIAGNOSTIC_INFO_OFFSET PARAMETER_VALUE_OFFSET
 448
 449 static void
 450 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 451 {
 452   guint16 diag_info_length;
 453
 454   diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 455   proto_tree_add_item(parameter_tree, hf_diagnostic_information, parameter_tvb, DIAGNOSTIC_INFO_OFFSET, diag_info_length, NETWORK_BYTE_ORDER);
 456   proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
 457 }
 458
 459 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
 460
 461 static void
 462 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 463 {
 464   guint16 heartbeat_data_length;
 465
 466   heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 467   proto_tree_add_item(parameter_tree, hf_heartbeat_data, parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, NETWORK_BYTE_ORDER);
 468   proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
 469 }
 470
 471 #define UNKNOWN_UNAVAIL_CAUSE                  0
 472 #define UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE   1
 473 #define INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE 2
 474
 475 static const value_string unavailability_cause_values[] = {
 476   { UNKNOWN_UNAVAIL_CAUSE,                  "Unknown"                  },
 477   { UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE,   "Unequipped remote user"   },
 478   { INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE, "Inaccessable remote user" },
 479   {0,                                       NULL } };
 480
 481 #define RESERVED_0_USER_ID                0
 482 #define RESERVED_1_USER_ID                1
 483 #define RESERVED_2_USER_ID                2
 484 #define SCCP_USER_ID                      3
 485 #define TUP_USER_ID                       4
 486 #define ISUP_USER_ID                      5
 487 #define RESERVED_6_USER_ID                6
 488 #define RESERVED_7_USER_ID                7
 489 #define RESERVED_8_USER_ID                8
 490 #define BROADBAND_ISUP_USER_ID            9
 491 #define SATELLITE_ISUP_USER_ID           10
 492 #define RESERVED_11_USER_ID              11
 493 #define AAL_2_SIGNALING_USER_ID          12
 494 #define BICC_USER_ID                     13
 495 #define GATEWAY_CONTROL_PROTOCOL_USER_ID 14
 496 #define RESERVED_15_USER_ID              15
 497
 498 static const value_string user_identity_values[] = {
 499   { RESERVED_0_USER_ID,     "Reserved"       },
 500   { RESERVED_1_USER_ID,     "Reserved"       },
 501   { RESERVED_2_USER_ID,     "Reserved"       },
 502   { SCCP_USER_ID,           "SCCP"           },
 503   { TUP_USER_ID,            "TUP"            },
 504   { ISUP_USER_ID,           "ISUP"           },
 505   { RESERVED_6_USER_ID,     "Reserved"       },
 506   { RESERVED_7_USER_ID,     "Reserved"       },
 507   { RESERVED_8_USER_ID,     "Reserved"       },
 508   { BROADBAND_ISUP_USER_ID, "Broadband ISUP" },
 509   { SATELLITE_ISUP_USER_ID, "Satellite ISUP" },
 510   { RESERVED_11_USER_ID,    "Reserved"       },
 511   { AAL_2_SIGNALING_USER_ID,"AAL type2 Signaling"},
 512   { BICC_USER_ID,           "Bearer Independent Call Control (BICC)"},
 513   { GATEWAY_CONTROL_PROTOCOL_USER_ID, "Gateway Control Protocol"},
 514   { RESERVED_15_USER_ID,    "Reserved"       },
 515
 516   {0,                       NULL             } };
 517
 518 #define CAUSE_LENGTH 2
 519 #define USER_LENGTH  2
 520
 521 #define CAUSE_OFFSET  PARAMETER_VALUE_OFFSET
 522 #define USER_OFFSET   (CAUSE_OFFSET + CAUSE_LENGTH)
 523
 524 static void
 525 dissect_user_cause_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 526 {
 527   proto_tree_add_item(parameter_tree, hf_cause, parameter_tvb, CAUSE_OFFSET, CAUSE_LENGTH, NETWORK_BYTE_ORDER);
 528   proto_tree_add_item(parameter_tree, hf_user,  parameter_tvb, USER_OFFSET,  USER_LENGTH,  NETWORK_BYTE_ORDER);
 529   proto_item_append_text(parameter_item, " (%s: %s)",
 530                          val_to_str(tvb_get_ntohs(parameter_tvb, USER_OFFSET),  user_identity_values,        "Unknown user"),
 531                          val_to_str(tvb_get_ntohs(parameter_tvb, CAUSE_OFFSET), unavailability_cause_values, "unknown cause"));
 532 }
 533
 534 #define UNSPECIFIED_REASON          0
 535 #define USER_UNAVAILABLE_REASON     1
 536 #define MANAGEMENT_BLOCKING_REASON  2
 537
 538 static const value_string reason_values[] = {
 539   { UNSPECIFIED_REASON,         "Unspecified" },
 540   { USER_UNAVAILABLE_REASON,    "User unavailable" },
 541   { MANAGEMENT_BLOCKING_REASON, "Management blocking" },
 542   {0,                           NULL } };
 543
 544 #define REASON_LENGTH 4
 545 #define REASON_OFFSET PARAMETER_VALUE_OFFSET
 546
 547 static void
 548 dissect_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 549 {
 550   proto_tree_add_item(parameter_tree, hf_reason, parameter_tvb, REASON_OFFSET, REASON_LENGTH, NETWORK_BYTE_ORDER);
 551   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REASON_OFFSET), reason_values, "unknown"));
 552 }
 553
 554 #define TRAFFIC_MODE_TYPE_LENGTH 4
 555 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 556
 557 static const value_string v5_traffic_mode_type_values[] = {
 558   { 1, "Over-ride"            },
 559   { 2, "Load-share"           },
 560   { 3, "Over-ride (standby)"  },
 561   { 4, "Load-share (standby)" },
 562   { 0, NULL                   } };
 563
 564 static void
 565 dissect_v5_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 566 {
 567   proto_tree_add_item(parameter_tree, hf_v5_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 568   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), v5_traffic_mode_type_values, "unknown"));
 569 }
 570
 571 static const value_string v6_traffic_mode_type_values[] = {
 572   { 1, "Over-ride"            },
 573   { 2, "Load-share"           },
 574   { 3, "Over-ride (standby)"  },
 575   { 4, "Load-share (standby)" },
 576   { 0, NULL                   } };
 577
 578 static void
 579 dissect_v6_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 580 {
 581   proto_tree_add_item(parameter_tree, hf_v6_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 582   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), v6_traffic_mode_type_values, "unknown"));
 583 }
 584
 585 static const value_string v7_traffic_mode_type_values[] = {
 586   { 1, "Over-ride"            },
 587   { 2, "Load-share"           },
 588   { 0, NULL                   } };
 589
 590 static void
 591 dissect_v7_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 592 {
 593   proto_tree_add_item(parameter_tree, hf_v7_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 594   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), v7_traffic_mode_type_values, "unknown"));
 595 }
 596
 597 static const value_string traffic_mode_type_values[] = {
 598   { 1, "Over-ride"  },
 599   { 2, "Load-share" },
 600   { 3, "Broadcast"  },
 601   { 0, NULL         } };
 602
 603 static void
 604 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 605 {
 606   proto_tree_add_item(parameter_tree, hf_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 607   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), traffic_mode_type_values, "unknown"));
 608 }
 609
 610 #define ERROR_CODE_LENGTH 4
 611 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
 612
 613 static const value_string v5_error_code_values[] = {
 614   {  1, "Invalid version"               },
 615   {  2, "Invalid network appearance"    },
 616   {  3, "Unsupported message class"     },
 617   {  4, "Unsupported message type"      },
 618   {  5, "Invalid traffic handling mode" },
 619   {  6, "Unexpected message"            },
 620   {  7, "Protocol error"                },
 621   {  8, "Invalid routing context"       },
 622   {  0,  NULL                           } };
 623
 624 static void
 625 dissect_v5_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 626 {
 627   proto_tree_add_item(parameter_tree, hf_v5_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 628   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v5_error_code_values, "unknown"));
 629 }
 630
 631 static const value_string v6_error_code_values[] = {
 632   {  1, "Invalid version"               },
 633   {  2, "Invalid network appearance"    },
 634   {  3, "Unsupported message class"     },
 635   {  4, "Unsupported message type"      },
 636   {  5, "Invalid traffic handling mode" },
 637   {  6, "Unexpected message"            },
 638   {  7, "Protocol error"                },
 639   {  8, "Invalid routing context"       },
 640   {  9, "Invalid stream identifier"     },
 641   { 10, "Invalid parameter value"       },
 642   {  0,  NULL                           } };
 643
 644
 645 static void
 646 dissect_v6_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 647 {
 648   proto_tree_add_item(parameter_tree, hf_v6_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 649   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v6_error_code_values, "unknown"));
 650 }
 651
 652 static const value_string v7_error_code_values[] = {
 653   {  1, "Invalid version"               },
 654   {  2, "Invalid network appearance"    },
 655   {  3, "Unsupported message class"     },
 656   {  4, "Unsupported message type"      },
 657   {  5, "Invalid traffic handling mode" },
 658   {  6, "Unexpected message"            },
 659   {  7, "Protocol error"                },
 660   {  8, "Invalid routing context"       },
 661   {  9, "Invalid stream identifier"     },
 662   { 10, "Invalid parameter value"       },
 663   { 11, "Refused - Management Blocking" },
 664   { 12, "Unknown Routing Context"       },
 665   {  0,  NULL                           } };
 666
 667
 668 static void
 669 dissect_v7_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 670 {
 671   proto_tree_add_item(parameter_tree, hf_v7_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 672   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v7_error_code_values, "unknown"));
 673 }
 674
 675 static const value_string error_code_values[] = {
 676   { 0x01, "Invalid version"                   },
 677   { 0x03, "Unsupported message class"         },
 678   { 0x04, "Unsupported message type"          },
 679   { 0x05, "Unsupported traffic handling mode" },
 680   { 0x06, "Unexpected message"                },
 681   { 0x07, "Protocol error"                    },
 682   { 0x09, "Invalid stream identifier"         },
 683   { 0x0d, "Refused - management blocking"     },
 684   { 0x0e, "ASP identifier required"           },
 685   { 0x0f, "Invalid ASP identifier"            },
 686   { 0x11, "Invalid parameter value"           },
 687   { 0x12, "Parameter field error"             },
 688   { 0x13, "Unexpected parameter"              },
 689   { 0x14, "Destination status unknown"        },
 690   { 0x15, "Invalid network appearance"        },
 691   { 0x16, "Missing parameter"                 },
 692   { 0x19, "Invalid routing context"           },
 693   { 0x1a, "No configured AS for ASP"          },
 694   { 0,    NULL                                } };
 695
 696 static void
 697 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 698 {
 699   proto_tree_add_item(parameter_tree, hf_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 700   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), error_code_values, "unknown"));
 701 }
 702
 703 #define AS_STATE_CHANGE_TYPE       1
 704 #define OTHER_TYPE                 2
 705
 706 static const value_string status_type_values[] = {
 707   { AS_STATE_CHANGE_TYPE,            "Application server state change" },
 708   { OTHER_TYPE,                      "Other" },
 709   { 0,                           NULL } };
 710
 711 #define RESERVED_INFO              1
 712 #define AS_INACTIVE_INFO           2
 713 #define AS_ACTIVE_INFO             3
 714 #define AS_PENDING_INFO            4
 715
 716 #define INSUFFICIENT_ASP_RES_INFO  1
 717 #define ALTERNATE_ASP_ACTIVE_INFO  2
 718 #define ASP_FAILURE_INFO           3
 719
 720 static const value_string v567_status_type_info_values[] = {
 721   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 722   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 723   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 724   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 725   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 726   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 727   {0,                           NULL } };
 728
 729
 730 #define STATUS_TYPE_LENGTH 2
 731 #define STATUS_INFO_LENGTH 2
 732
 733 #define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 734 #define STATUS_INFO_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
 735
 736 static void
 737 dissect_v567_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 738 {
 739   guint16 status_type, status_info;
 740
 741   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 742   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 743
 744   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 745   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 746                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, v567_status_type_info_values, "unknown"), status_info);
 747
 748   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, v567_status_type_info_values, "unknown status information"));
 749 }
 750
 751 static const value_string status_type_info_values[] = {
 752   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 753   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 754   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 755   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 756   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 757   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 758   { OTHER_TYPE           * 256 * 256 + ASP_FAILURE_INFO,          "ASP Failure" },
 759   {0,                           NULL } };
 760
 761 static void
 762 dissect_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 763 {
 764   guint16 status_type, status_info;
 765
 766   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 767   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 768
 769   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 770   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 771                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown"), status_info);
 772
 773   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown status information"));
 774 }
 775
 776 static const value_string congestion_level_values[] = {
 777   { 0, "No congestion or undefined" },
 778   { 1, "Congestion level 1"         },
 779   { 2, "Congestion level 2"         },
 780   { 3, "Congestion level 3"         },
 781   { 0, NULL                         } };
 782
 783 #define CONG_IND_RESERVED_LENGTH    3
 784 #define CONG_IND_LEVEL_LENGTH       1
 785
 786 #define CONG_IND_RESERVED_OFFSET     PARAMETER_VALUE_OFFSET
 787 #define CONG_IND_LEVEL_OFFSET        (CONG_IND_RESERVED_OFFSET + CONG_IND_RESERVED_LENGTH)
 788
 789 static void
 790 dissect_congestion_indication_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 791 {
 792   proto_tree_add_item(parameter_tree, hf_congestion_reserved, parameter_tvb, CONG_IND_RESERVED_OFFSET, CONG_IND_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 793   proto_tree_add_item(parameter_tree, hf_congestion_level,    parameter_tvb, CONG_IND_LEVEL_OFFSET,    CONG_IND_LEVEL_LENGTH,    NETWORK_BYTE_ORDER);
 794   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_guint8(parameter_tvb, CONG_IND_LEVEL_OFFSET), congestion_level_values, "unknown"));
 795 }
 796
 797 #define ASP_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 798 #define ASP_IDENTIFIER_LENGTH  4
 799
 800 static void
 801 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 802 {
 803   proto_tree_add_item(parameter_tree, hf_asp_identifier, parameter_tvb, ASP_IDENTIFIER_OFFSET, ASP_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 804   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_IDENTIFIER_OFFSET));
 805 }
 806
 807 #define PROTOCOL_DATA_1_OFFSET PARAMETER_VALUE_OFFSET
 808
 809 static void
 810 dissect_protocol_data_1_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 811 {
 812   guint16 protocol_data_length;
 813   tvbuff_t *payload_tvb;
 814
 815   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 816   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_1_OFFSET, protocol_data_length, protocol_data_length);
 817   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 818   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 819   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 820 }
 821
 822 #define LI_OCTETT_LENGTH 1
 823 #define LI_OCTETT_OFFSET PARAMETER_VALUE_OFFSET
 824 #define PROTOCOL_DATA_2_OFFSET (PARAMETER_VALUE_OFFSET + LI_OCTETT_LENGTH)
 825
 826 static void
 827 dissect_protocol_data_2_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
 828 {
 829   guint8 li;
 830   guint16 protocol_data_length;
 831   tvbuff_t *payload_tvb;
 832
 833   li                   = tvb_get_guint8(parameter_tvb, LI_OCTETT_OFFSET);
 834   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - LI_OCTETT_LENGTH;
 835   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_2_OFFSET, protocol_data_length, protocol_data_length);
 836   proto_tree_add_item(parameter_tree, hf_li, parameter_tvb, LI_OCTETT_OFFSET, LI_OCTETT_LENGTH, NETWORK_BYTE_ORDER);
 837   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 838   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + LI_OCTETT_LENGTH);
 839   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 840 }
 841
 842
 843
 844 #define CON_DEST_RESERVED_LENGTH    1
 845 #define CON_DEST_PC_LENGTH          3
 846
 847 #define CON_DEST_RESERVED_OFFSET    PARAMETER_VALUE_OFFSET
 848 #define CON_DEST_PC_OFFSET          (CON_DEST_RESERVED_OFFSET + CON_DEST_RESERVED_LENGTH)
 849
 850 static void
 851 dissect_concerned_destination_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 852 {
 853   proto_item *item;
 854
 855   proto_tree_add_item(parameter_tree, hf_concerned_dest_reserved, parameter_tvb, CON_DEST_RESERVED_OFFSET, CON_DEST_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 856   item = proto_tree_add_item(parameter_tree, hf_concerned_dest_pc,       parameter_tvb, CON_DEST_PC_OFFSET,       CON_DEST_PC_LENGTH,       NETWORK_BYTE_ORDER);
 857   if (mtp3_pc_structured())
 858     proto_item_append_text(item, " (%s)", mtp3_pc_to_str(tvb_get_ntoh24(parameter_tvb, CON_DEST_PC_OFFSET)));
 859   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, CON_DEST_PC_OFFSET));
 860 }
 861
 862 static void
 863 dissect_routing_key_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 864 {
 865   tvbuff_t *parameters_tvb;
 866   guint16 length, parameters_length;
 867
 868   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 869   parameters_length = length - PARAMETER_HEADER_LENGTH;
 870   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 871   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 872 }
 873
 874 static const value_string registration_result_status_values[] = {
 875   { 0, "Successfully Registered" } ,
 876   { 1, "Error - Unknown" } ,
 877   { 2, "Error - Invalid DPC" } ,
 878   { 3, "Error - Invalid Network Appearance" } ,
 879   { 4, "Error - Invalid Routing Key" } ,
 880   { 5, "Error - Permission Denied" } ,
 881   { 6, "Error - Overlapping (Non-unique) Routing Key" } ,
 882   { 7, "Error - Routing Key not Provisioned" } ,
 883   { 8, "Error - Insufficient Resources" } ,
 884   { 0, NULL } };
 885
 886 #define REG_RES_IDENTIFIER_LENGTH 4
 887 #define REG_RES_STATUS_LENGTH     4
 888 #define REG_RES_CONTEXT_LENGTH    4
 889
 890 #define REG_RES_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 891 #define REG_RES_STATUS_OFFSET     (REG_RES_IDENTIFIER_OFFSET + REG_RES_IDENTIFIER_LENGTH)
 892 #define REG_RES_CONTEXT_OFFSET    (REG_RES_STATUS_OFFSET + REG_RES_STATUS_LENGTH)
 893
 894 static void
 895 dissect_v67_registration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 896 {
 897   proto_tree_add_item(parameter_tree, hf_registration_result_identifier, parameter_tvb, REG_RES_IDENTIFIER_OFFSET, REG_RES_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 898   proto_tree_add_item(parameter_tree, hf_registration_result_status,     parameter_tvb, REG_RES_STATUS_OFFSET,     REG_RES_STATUS_LENGTH,     NETWORK_BYTE_ORDER);
 899   proto_tree_add_item(parameter_tree, hf_registration_result_context,    parameter_tvb, REG_RES_CONTEXT_OFFSET,    REG_RES_CONTEXT_LENGTH,    NETWORK_BYTE_ORDER);
 900 }
 901
 902 static void
 903 dissect_registration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 904 {
 905   tvbuff_t *parameters_tvb;
 906   guint16 length, parameters_length;
 907
 908   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 909   parameters_length = length - PARAMETER_HEADER_LENGTH;
 910   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 911   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 912 }
 913
 914 static const value_string v6_deregistration_result_status_values[] = {
 915   { 0, "Successfully De-registered" } ,
 916   { 1, "Error - Unknown" } ,
 917   { 2, "Error - Invalid Routing context" } ,
 918   { 3, "Error - Permission Denied" } ,
 919   { 4, "Error - Not registered" } ,
 920   { 0, NULL } };
 921
 922 #define DEREG_RES_CONTEXT_LENGTH 4
 923 #define DEREG_RES_STATUS_LENGTH  4
 924
 925 #define DEREG_RES_CONTEXT_OFFSET PARAMETER_VALUE_OFFSET
 926 #define DEREG_RES_STATUS_OFFSET  (DEREG_RES_CONTEXT_OFFSET + DEREG_RES_CONTEXT_LENGTH)
 927
 928 static void
 929 dissect_v67_deregistration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 930 {
 931   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_context, parameter_tvb, DEREG_RES_CONTEXT_OFFSET, DEREG_RES_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 932   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_status,  parameter_tvb, DEREG_RES_STATUS_OFFSET,  DEREG_RES_STATUS_LENGTH,  NETWORK_BYTE_ORDER);
 933 }
 934
 935 static void
 936 dissect_deregistration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 937 {
 938   tvbuff_t *parameters_tvb;
 939   guint16 length, parameters_length;
 940
 941   length            = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 942   parameters_length = length - PARAMETER_HEADER_LENGTH;
 943   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 944   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 945 }
 946
 947
 948 #define LOCAL_RK_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 949 #define LOCAL_RK_IDENTIFIER_LENGTH 4
 950
 951 static void
 952 dissect_local_routing_key_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 953 {
 954   guint32 id;
 955
 956   id = tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET);
 957   proto_tree_add_item(parameter_tree, hf_local_rk_identifier, parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET, LOCAL_RK_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 958   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET));
 959 }
 960
 961 #define DPC_MASK_LENGTH    1
 962 #define DPC_PC_LENGTH      3
 963
 964 #define DPC_MASK_OFFSET    PARAMETER_VALUE_OFFSET
 965 #define DPC_PC_OFFSET      (DPC_MASK_OFFSET + DPC_MASK_LENGTH)
 966
 967 static void
 968 dissect_destination_point_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 969 {
 970   proto_item *item;
 971
 972   proto_tree_add_item(parameter_tree, hf_dpc_mask, parameter_tvb, DPC_MASK_OFFSET, DPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 973   item = proto_tree_add_item(parameter_tree, hf_dpc_pc,   parameter_tvb, DPC_PC_OFFSET,   DPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 974   if (mtp3_pc_structured())
 975     proto_item_append_text(item, " (%s)", mtp3_pc_to_str(tvb_get_ntoh24(parameter_tvb, DPC_PC_OFFSET)));
 976   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, DPC_PC_OFFSET));
 977 }
 978
 979 #define SI_LENGTH 1
 980
 981 static void
 982 dissect_service_indicators_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 983 {
 984   guint16 length, number_of_sis, si_number;
 985   gint si_offset;
 986
 987   length        = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 988   number_of_sis = length - PARAMETER_HEADER_LENGTH;
 989
 990   si_offset = PARAMETER_VALUE_OFFSET;
 991   for(si_number=1; si_number <= number_of_sis; si_number++) {
 992     proto_tree_add_item(parameter_tree, hf_si, parameter_tvb, si_offset, SI_LENGTH, NETWORK_BYTE_ORDER);
 993     si_offset += SI_LENGTH;
 994   };
 995   proto_item_append_text(parameter_item, " (%u indicator%s)", number_of_sis, plurality(number_of_sis, "", "s"));
 996
 997 }
 998 #define SSN_LENGTH 1
 999
1000 static void
1001 dissect_subsystem_numbers_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1002 {
1003   guint16 length, number_of_ssns, ssn_number;
1004   gint ssn_offset;
1005
1006   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1007   number_of_ssns = length - PARAMETER_HEADER_LENGTH;
1008
1009   ssn_offset = PARAMETER_VALUE_OFFSET;
1010   for(ssn_number=1; ssn_number <= number_of_ssns; ssn_number++) {
1011     proto_tree_add_item(parameter_tree, hf_ssn, parameter_tvb, ssn_offset, SSN_LENGTH, NETWORK_BYTE_ORDER);
1012     ssn_offset += SSN_LENGTH;
1013   };
1014   proto_item_append_text(parameter_item, " (%u number%s)", number_of_ssns, plurality(number_of_ssns, "", "s"));
1015
1016 }
1017
1018 #define OPC_MASK_LENGTH             1
1019 #define OPC_PC_LENGTH               3
1020 #define OPC_LENGTH                  (OPC_MASK_LENGTH + OPC_PC_LENGTH)
1021 #define OPC_MASK_OFFSET             0
1022 #define OPC_PC_OFFSET               (OPC_MASK_OFFSET + OPC_MASK_LENGTH)
1023
1024 static void
1025 dissect_originating_point_code_list_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1026 {
1027   guint16 length, number_of_point_codes, point_code_number;
1028   gint point_code_offset;
1029   proto_item *item;
1030
1031   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1032   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / 4;
1033
1034   point_code_offset = PARAMETER_VALUE_OFFSET;
1035   for(point_code_number=1; point_code_number <= number_of_point_codes; point_code_number++) {
1036     proto_tree_add_item(parameter_tree, hf_opc_list_mask, parameter_tvb, point_code_offset + OPC_MASK_OFFSET, OPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
1037     item = proto_tree_add_item(parameter_tree, hf_opc_list_pc,   parameter_tvb, point_code_offset + OPC_PC_OFFSET,   OPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
1038     if (mtp3_pc_structured())
1039       proto_item_append_text(item, " (%s)", mtp3_pc_to_str(tvb_get_ntoh24(parameter_tvb, point_code_offset + OPC_PC_OFFSET)));
1040     point_code_offset += OPC_LENGTH;
1041   };
1042   proto_item_append_text(parameter_item, " (%u point code%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
1043 }
1044
1045 #define CIC_RANGE_MASK_LENGTH             1
1046 #define CIC_RANGE_PC_LENGTH               3
1047 #define CIC_RANGE_LOWER_LENGTH            2
1048 #define CIC_RANGE_UPPER_LENGTH            2
1049 #define CIC_RANGE_LENGTH                  (CIC_RANGE_MASK_LENGTH + CIC_RANGE_PC_LENGTH + CIC_RANGE_LOWER_LENGTH + CIC_RANGE_UPPER_LENGTH)
1050 #define CIC_RANGE_MASK_OFFSET             0
1051 #define CIC_RANGE_PC_OFFSET               (CIC_RANGE_MASK_OFFSET + CIC_RANGE_MASK_LENGTH)
1052 #define CIC_RANGE_LOWER_OFFSET            (CIC_RANGE_PC_OFFSET + CIC_RANGE_PC_LENGTH)
1053 #define CIC_RANGE_UPPER_OFFSET            (CIC_RANGE_LOWER_OFFSET + CIC_RANGE_LOWER_LENGTH)
1054
1055 static void
1056 dissect_circuit_range_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1057 {
1058   guint16 length, number_of_point_codes, point_code_number;
1059   gint point_code_offset;
1060
1061   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1062   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / CIC_RANGE_LENGTH;
1063
1064   point_code_offset = PARAMETER_VALUE_OFFSET;
1065   for(point_code_number = 1; point_code_number <= number_of_point_codes; point_code_number++) {
1066     proto_tree_add_item(parameter_tree, hf_cic_range_mask,  parameter_tvb, point_code_offset + CIC_RANGE_MASK_OFFSET,  CIC_RANGE_MASK_LENGTH,  NETWORK_BYTE_ORDER);
1067     proto_tree_add_item(parameter_tree, hf_cic_range_pc,    parameter_tvb, point_code_offset + CIC_RANGE_PC_OFFSET,    CIC_RANGE_PC_LENGTH,    NETWORK_BYTE_ORDER);
1068     proto_tree_add_item(parameter_tree, hf_cic_range_lower, parameter_tvb, point_code_offset + CIC_RANGE_LOWER_OFFSET, CIC_RANGE_LOWER_LENGTH, NETWORK_BYTE_ORDER);
1069     proto_tree_add_item(parameter_tree, hf_cic_range_upper, parameter_tvb, point_code_offset + CIC_RANGE_UPPER_OFFSET, CIC_RANGE_UPPER_LENGTH, NETWORK_BYTE_ORDER);
1070     point_code_offset += CIC_RANGE_LENGTH;
1071   };
1072   proto_item_append_text(parameter_item, " (%u range%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
1073 }
1074
1075 #define DATA_OPC_LENGTH   4
1076 #define DATA_DPC_LENGTH   4
1077 #define DATA_SI_LENGTH    1
1078 #define DATA_NI_LENGTH    1
1079 #define DATA_MP_LENGTH    1
1080 #define DATA_SLS_LENGTH   1
1081 #define DATA_HDR_LENGTH   (DATA_OPC_LENGTH + DATA_DPC_LENGTH + DATA_SI_LENGTH + DATA_NI_LENGTH + DATA_MP_LENGTH + DATA_SLS_LENGTH)
1082
1083 #define DATA_OPC_OFFSET   PARAMETER_VALUE_OFFSET
1084 #define DATA_DPC_OFFSET   (DATA_OPC_OFFSET + DATA_OPC_LENGTH)
1085 #define DATA_SI_OFFSET    (DATA_DPC_OFFSET + DATA_DPC_LENGTH)
1086 #define DATA_NI_OFFSET    (DATA_SI_OFFSET  + DATA_SI_LENGTH)
1087 #define DATA_MP_OFFSET    (DATA_NI_OFFSET  + DATA_NI_LENGTH)
1088 #define DATA_SLS_OFFSET   (DATA_MP_OFFSET  + DATA_MP_LENGTH)
1089 #define DATA_ULP_OFFSET   (DATA_SLS_OFFSET + DATA_SLS_LENGTH)
1090
1091 static void
1092 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
1093 {
1094   guint16 ulp_length;
1095   tvbuff_t *payload_tvb;
1096   proto_item *item;
1097
1098   ulp_length  = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - DATA_HDR_LENGTH;
1099
1100   if (parameter_tree) {
1101     item = proto_tree_add_item(parameter_tree, hf_protocol_data_opc, parameter_tvb, DATA_OPC_OFFSET, DATA_OPC_LENGTH, NETWORK_BYTE_ORDER);
1102     if (mtp3_pc_structured())
1103       proto_item_append_text(item, " (%s)", mtp3_pc_to_str(tvb_get_ntohl(parameter_tvb, DATA_OPC_OFFSET)));
1104     item = proto_tree_add_item(parameter_tree, hf_protocol_data_dpc, parameter_tvb, DATA_DPC_OFFSET, DATA_DPC_LENGTH, NETWORK_BYTE_ORDER);
1105     if (mtp3_pc_structured())
1106       proto_item_append_text(item, " (%s)", mtp3_pc_to_str(tvb_get_ntohl(parameter_tvb, DATA_DPC_OFFSET)));
1107     proto_tree_add_item(parameter_tree, hf_protocol_data_si,  parameter_tvb, DATA_SI_OFFSET,  DATA_SI_LENGTH,  NETWORK_BYTE_ORDER);
1108     proto_tree_add_item(parameter_tree, hf_protocol_data_ni,  parameter_tvb, DATA_NI_OFFSET,  DATA_NI_LENGTH,  NETWORK_BYTE_ORDER);
1109     proto_tree_add_item(parameter_tree, hf_protocol_data_mp,  parameter_tvb, DATA_MP_OFFSET,  DATA_MP_LENGTH,  NETWORK_BYTE_ORDER);
1110     proto_tree_add_item(parameter_tree, hf_protocol_data_sls, parameter_tvb, DATA_SLS_OFFSET, DATA_SLS_LENGTH, NETWORK_BYTE_ORDER);
1111
1112     proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", ulp_length, plurality(ulp_length, "", "s"));
1113     proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + DATA_HDR_LENGTH);
1114   }
1115
1116   payload_tvb = tvb_new_subset(parameter_tvb, DATA_ULP_OFFSET, ulp_length, ulp_length);
1117   if (!dissector_try_port(si_dissector_table, tvb_get_guint8(parameter_tvb, DATA_SI_OFFSET), payload_tvb, pinfo, tree))
1118     call_dissector(data_handle, payload_tvb, pinfo, tree);
1119 }
1120
1121 #define CORR_ID_OFFSET PARAMETER_VALUE_OFFSET
1122 #define CORR_ID_LENGTH 4
1123
1124 static void
1125 dissect_correlation_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1126 {
1127   proto_tree_add_item(parameter_tree, hf_correlation_identifier, parameter_tvb, CORR_ID_OFFSET, CORR_ID_LENGTH, NETWORK_BYTE_ORDER);
1128   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, CORR_ID_OFFSET));
1129 }
1130
1131 #define REG_STATUS_LENGTH  4
1132 #define REG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1133
1134 static const value_string registration_status_values[] = {
1135   {  0, "Successfully Registered" },
1136   {  1, "Error - Unknown" },
1137   {  2, "Error - Invalid DPC" },
1138   {  3, "Error - Invalid Network Appearance" },
1139   {  4, "Error - Invalid Routing Key" },
1140   {  5, "Error - Permission Denied" },
1141   {  6, "Error - Cannot Support Unique Routing" },
1142   {  7, "Error - Routing Key not Currently Provisioned" },
1143   {  8, "Error - Insufficient Resources" },
1144   {  9, "Error - Unsupported RK parameter Field" },
1145   { 10, "Error - Unsupported/Invalid Traffic Handling Mode" },
1146   {  0, NULL } };
1147
1148 static void
1149 dissect_registration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1150 {
1151   proto_tree_add_item(parameter_tree, hf_registration_status, parameter_tvb, REG_STATUS_OFFSET, REG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1152   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REG_STATUS_OFFSET), registration_status_values, "unknown"));
1153 }
1154
1155 #define DEREG_STATUS_LENGTH  4
1156 #define DEREG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1157
1158 static const value_string deregistration_status_values[] = {
1159   { 0, "Successfully Deregistered" },
1160   { 1, "Error - Unknown" },
1161   { 2, "Error - Invalid Routing Context" },
1162   { 3, "Error - Permission Denied" },
1163   { 4, "Error - Not Registered" },
1164   { 5, "Error - ASP Currently Active for Routing Context" },
1165   { 0, NULL } };
1166
1167 static void
1168 dissect_deregistration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1169 {
1170   proto_tree_add_item(parameter_tree, hf_deregistration_status, parameter_tvb, DEREG_STATUS_OFFSET, DEREG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1171   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, DEREG_STATUS_OFFSET), deregistration_status_values, "unknown"));
1172 }
1173
1174 static void
1175 dissect_registration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1176 {
1177   tvbuff_t *parameters_tvb;
1178   guint16 parameters_length;
1179
1180   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1181   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1182   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1183 }
1184
1185 static void
1186 dissect_deregistration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1187 {
1188   tvbuff_t *parameters_tvb;
1189   guint16 parameters_length;
1190
1191   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1192   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1193   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1194 }
1195
1196 static void
1197 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1198 {
1199   guint16 tag, parameter_value_length;
1200
1201   tag                    = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1202   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1203   proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, NETWORK_BYTE_ORDER);
1204   proto_item_append_text(parameter_item, " (tag %u and %u byte%s value)", tag, parameter_value_length, plurality(parameter_value_length, "", "s"));
1205 }
1206
1207 #define V5_NETWORK_APPEARANCE_PARAMETER_TAG       1
1208 #define V5_PROTOCOL_DATA_PARAMETER_TAG            3
1209 #define V5_INFO_PARAMETER_TAG                     4
1210 #define V5_AFFECTED_DESTINATIONS_PARAMETER_TAG    5
1211 #define V5_ROUTING_CONTEXT_PARAMETER_TAG          6
1212 #define V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG   7
1213 #define V5_HEARTBEAT_DATA_PARAMETER_TAG           8
1214 #define V5_USER_CAUSE_PARAMETER_TAG               9
1215 #define V5_REASON_PARAMETER_TAG                   10
1216 #define V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG        11
1217 #define V5_ERROR_CODE_PARAMETER_TAG               12
1218 #define V5_STATUS_PARAMETER_TAG                   13
1219 #define V5_CONGESTION_INDICATION_PARAMETER_TAG    14
1220
1221 static const value_string v5_parameter_tag_values[] = {
1222   { V5_NETWORK_APPEARANCE_PARAMETER_TAG,     "Network appearance" },
1223   { V5_PROTOCOL_DATA_PARAMETER_TAG,          "Protocol data" },
1224   { V5_INFO_PARAMETER_TAG,                   "Info" },
1225   { V5_AFFECTED_DESTINATIONS_PARAMETER_TAG,  "Affected destinations" },
1226   { V5_ROUTING_CONTEXT_PARAMETER_TAG,        "Routing context" },
1227   { V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
1228   { V5_HEARTBEAT_DATA_PARAMETER_TAG,         "Heartbeat data" },
1229   { V5_USER_CAUSE_PARAMETER_TAG,             "User / Cause" },
1230   { V5_REASON_PARAMETER_TAG,                 "Reason" },
1231   { V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG,      "Traffic mode type" },
1232   { V5_ERROR_CODE_PARAMETER_TAG,             "Error code" },
1233   { V5_STATUS_PARAMETER_TAG,                 "Status" },
1234   { V5_CONGESTION_INDICATION_PARAMETER_TAG,  "Congestion indication" },
1235   { 0,                                       NULL } };
1236
1237 static void
1238 dissect_v5_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1239 {
1240   guint16 tag, length, padding_length;
1241   proto_item *parameter_item;
1242   proto_tree *parameter_tree;
1243
1244   /* extract tag and length from the parameter */
1245   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1246   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1247   padding_length = tvb_length(parameter_tvb) - length;
1248
1249   if (!tree && tag != V5_PROTOCOL_DATA_PARAMETER_TAG)
1250     return;     /* Nothing to do here */
1251
1252   /* create proto_tree stuff */
1253   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, v5_parameter_tag_values, "Unknown parameter"));
1254   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1255
1256   /* add tag and length to the parameter tree */
1257   proto_tree_add_item(parameter_tree, hf_v5_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1258   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1259
1260   switch(tag) {
1261   case V5_NETWORK_APPEARANCE_PARAMETER_TAG:
1262     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1263     break;
1264   case V5_PROTOCOL_DATA_PARAMETER_TAG:
1265     dissect_v5_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_item);
1266     break;
1267   case V5_INFO_PARAMETER_TAG:
1268     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1269     break;
1270   case V5_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1271     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1272     break;
1273   case V5_ROUTING_CONTEXT_PARAMETER_TAG:
1274     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1275     break;
1276   case V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1277     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1278     break;
1279   case V5_HEARTBEAT_DATA_PARAMETER_TAG:
1280     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1281     break;
1282   case V5_USER_CAUSE_PARAMETER_TAG:
1283     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1284     break;
1285   case V5_REASON_PARAMETER_TAG:
1286     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1287     break;
1288   case V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1289     dissect_v5_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1290     break;
1291   case V5_ERROR_CODE_PARAMETER_TAG:
1292     dissect_v5_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1293     break;
1294   case V5_STATUS_PARAMETER_TAG:
1295     dissect_v567_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1296     break;
1297   case V5_CONGESTION_INDICATION_PARAMETER_TAG:
1298     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1299     break;
1300   default:
1301     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1302     break;
1303   };
1304   if (padding_length > 0)
1305     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1306 }
1307
1308 #define V6_NETWORK_APPEARANCE_PARAMETER_TAG            1
1309 #define V6_PROTOCOL_DATA_1_PARAMETER_TAG               2
1310 #define V6_PROTOCOL_DATA_2_PARAMETER_TAG               3
1311 #define V6_INFO_PARAMETER_TAG                          4
1312 #define V6_AFFECTED_DESTINATIONS_PARAMETER_TAG         5
1313 #define V6_ROUTING_CONTEXT_PARAMETER_TAG               6
1314 #define V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG        7
1315 #define V6_HEARTBEAT_DATA_PARAMETER_TAG                8
1316 #define V6_USER_CAUSE_PARAMETER_TAG                    9
1317 #define V6_REASON_PARAMETER_TAG                       10
1318 #define V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG            11
1319 #define V6_ERROR_CODE_PARAMETER_TAG                   12
1320 #define V6_STATUS_PARAMETER_TAG                       13
1321 #define V6_CONGESTION_INDICATION_PARAMETER_TAG        14
1322 #define V6_CONCERNED_DESTINATION_PARAMETER_TAG        15
1323 #define V6_ROUTING_KEY_PARAMETER_TAG                  16
1324 #define V6_REGISTRATION_RESULT_PARAMETER_TAG          17
1325 #define V6_DEREGISTRATION_RESULT_PARAMETER_TAG        18
1326 #define V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 19
1327 #define V6_DESTINATION_POINT_CODE_PARAMETER_TAG       20
1328 #define V6_SERVICE_INDICATORS_PARAMETER_TAG           21
1329 #define V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG            22
1330 #define V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  23
1331 #define V6_CIRCUIT_RANGE_PARAMETER_TAG                24
1332 #define V6_REGISTRATION_RESULTS_PARAMETER_TAG         25
1333 #define V6_DEREGISTRATION_RESULTS_PARAMETER_TAG       26
1334
1335 static const value_string v6_parameter_tag_values[] = {
1336   { V6_NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" },
1337   { V6_PROTOCOL_DATA_1_PARAMETER_TAG,              "Protocol data 1" },
1338   { V6_PROTOCOL_DATA_2_PARAMETER_TAG,              "Protocol data 2" },
1339   { V6_INFO_PARAMETER_TAG,                         "Info" },
1340   { V6_AFFECTED_DESTINATIONS_PARAMETER_TAG,        "Affected destinations" },
1341   { V6_ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" },
1342   { V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic information" },
1343   { V6_HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" },
1344   { V6_USER_CAUSE_PARAMETER_TAG,                   "User / Cause" },
1345   { V6_REASON_PARAMETER_TAG,                       "Reason" },
1346   { V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" },
1347   { V6_ERROR_CODE_PARAMETER_TAG,                   "Error code" },
1348   { V6_STATUS_PARAMETER_TAG,                       "Status" },
1349   { V6_CONGESTION_INDICATION_PARAMETER_TAG,        "Congestion indication" },
1350   { V6_CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" },
1351   { V6_ROUTING_KEY_PARAMETER_TAG,                  "Routing Key" },
1352   { V6_REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" },
1353   { V6_DEREGISTRATION_RESULT_PARAMETER_TAG,        "De-registration result" },
1354   { V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" },
1355   { V6_DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" },
1356   { V6_SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" },
1357   { V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG,            "Subsystem numbers" },
1358   { V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" },
1359   { V6_CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" },
1360   { V6_REGISTRATION_RESULTS_PARAMETER_TAG,         "Registration results" },
1361   { V6_DEREGISTRATION_RESULTS_PARAMETER_TAG,       "De-registration results" },
1362   { 0,                           NULL } };
1363
1364 static void
1365 dissect_v6_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1366 {
1367   guint16 tag, length, padding_length;
1368   proto_item *parameter_item;
1369   proto_tree *parameter_tree;
1370
1371   /* extract tag and length from the parameter */
1372   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1373   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1374   padding_length = tvb_length(parameter_tvb) - length;
1375
1376   if (!tree && tag != V6_PROTOCOL_DATA_1_PARAMETER_TAG && tag != V6_PROTOCOL_DATA_2_PARAMETER_TAG)
1377     return;     /* Nothing to do here */
1378
1379   /* create proto_tree stuff */
1380   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, v6_parameter_tag_values, "Unknown parameter"));
1381   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1382
1383   /* add tag and length to the parameter tree */
1384   proto_tree_add_item(parameter_tree, hf_v6_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1385   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1386
1387   switch(tag) {
1388   case V6_NETWORK_APPEARANCE_PARAMETER_TAG:
1389     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1390     break;
1391   case V6_PROTOCOL_DATA_1_PARAMETER_TAG:
1392     dissect_protocol_data_1_parameter(parameter_tvb, pinfo, tree, parameter_item);
1393     break;
1394   case V6_PROTOCOL_DATA_2_PARAMETER_TAG:
1395     dissect_protocol_data_2_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1396     break;
1397   case V6_INFO_PARAMETER_TAG:
1398     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1399     break;
1400   case V6_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1401     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1402     break;
1403   case V6_ROUTING_CONTEXT_PARAMETER_TAG:
1404     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1405     break;
1406   case V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1407     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1408     break;
1409   case V6_HEARTBEAT_DATA_PARAMETER_TAG:
1410     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1411     break;
1412   case V6_USER_CAUSE_PARAMETER_TAG:
1413     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1414     break;
1415   case V6_REASON_PARAMETER_TAG:
1416     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1417     break;
1418   case V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1419     dissect_v6_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1420     break;
1421   case V6_ERROR_CODE_PARAMETER_TAG:
1422     dissect_v6_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1423     break;
1424   case V6_STATUS_PARAMETER_TAG:
1425     dissect_v567_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1426     break;
1427   case V6_CONGESTION_INDICATION_PARAMETER_TAG:
1428     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1429     break;
1430   case V6_CONCERNED_DESTINATION_PARAMETER_TAG:
1431     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1432     break;
1433   case V6_ROUTING_KEY_PARAMETER_TAG:
1434     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1435     break;
1436   case V6_REGISTRATION_RESULT_PARAMETER_TAG:
1437     dissect_v67_registration_result_parameter(parameter_tvb, parameter_tree);
1438     break;
1439   case V6_DEREGISTRATION_RESULT_PARAMETER_TAG:
1440     dissect_v67_deregistration_result_parameter(parameter_tvb, parameter_tree);
1441     break;
1442   case V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1443     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1444     break;
1445   case V6_DESTINATION_POINT_CODE_PARAMETER_TAG:
1446     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1447     break;
1448   case V6_SERVICE_INDICATORS_PARAMETER_TAG:
1449     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1450     break;
1451   case V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG:
1452     dissect_subsystem_numbers_parameter(parameter_tvb, parameter_tree, parameter_item);
1453     break;
1454   case V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1455     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1456     break;
1457   case V6_CIRCUIT_RANGE_PARAMETER_TAG:
1458     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1459     break;
1460   case V6_REGISTRATION_RESULTS_PARAMETER_TAG:
1461     dissect_registration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1462     break;
1463   case V6_DEREGISTRATION_RESULTS_PARAMETER_TAG:
1464     dissect_deregistration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1465     break;
1466   default:
1467     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1468     break;
1469   };
1470
1471   if (padding_length > 0)
1472     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1473 }
1474
1475 #define V7_NETWORK_APPEARANCE_PARAMETER_TAG            0x80
1476 #define V7_PROTOCOL_DATA_1_PARAMETER_TAG               0x81
1477 #define V7_PROTOCOL_DATA_2_PARAMETER_TAG               0x82
1478 #define V7_INFO_PARAMETER_TAG                          0x04
1479 #define V7_AFFECTED_DESTINATIONS_PARAMETER_TAG         0x83
1480 #define V7_ROUTING_CONTEXT_PARAMETER_TAG               0x06
1481 #define V7_DIAGNOSTIC_INFORMATION_PARAMETER_TAG        0x07
1482 #define V7_HEARTBEAT_DATA_PARAMETER_TAG                0x09
1483 #define V7_USER_CAUSE_PARAMETER_TAG                    0x84
1484 #define V7_REASON_PARAMETER_TAG                        0x0a
1485 #define V7_TRAFFIC_MODE_TYPE_PARAMETER_TAG             0x0b
1486 #define V7_ERROR_CODE_PARAMETER_TAG                    0x0c
1487 #define V7_STATUS_PARAMETER_TAG                        0x0d
1488 #define V7_CONGESTION_INDICATION_PARAMETER_TAG         0x85
1489 #define V7_CONCERNED_DESTINATION_PARAMETER_TAG         0x86
1490 #define V7_ROUTING_KEY_PARAMETER_TAG                   0x87
1491 #define V7_REGISTRATION_RESULT_PARAMETER_TAG           0x88
1492 #define V7_DEREGISTRATION_RESULT_PARAMETER_TAG         0x89
1493 #define V7_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG  0x8a
1494 #define V7_DESTINATION_POINT_CODE_PARAMETER_TAG        0x8b
1495 #define V7_SERVICE_INDICATORS_PARAMETER_TAG            0x8c
1496 #define V7_SUBSYSTEM_NUMBERS_PARAMETER_TAG             0x8d
1497 #define V7_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG   0x8e
1498 #define V7_CIRCUIT_RANGE_PARAMETER_TAG                 0x8f
1499 #define V7_REGISTRATION_RESULTS_PARAMETER_TAG          0x90
1500 #define V7_DEREGISTRATION_RESULTS_PARAMETER_TAG        0x91
1501
1502 static const value_string v7_parameter_tag_values[] = {
1503   { V7_NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" },
1504   { V7_PROTOCOL_DATA_1_PARAMETER_TAG,              "Protocol data 1" },
1505   { V7_PROTOCOL_DATA_2_PARAMETER_TAG,              "Protocol data 2" },
1506   { V7_INFO_PARAMETER_TAG,                         "Info" },
1507   { V7_AFFECTED_DESTINATIONS_PARAMETER_TAG,        "Affected destinations" },
1508   { V7_ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" },
1509   { V7_DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic information" },
1510   { V7_HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" },
1511   { V7_USER_CAUSE_PARAMETER_TAG,                   "User / Cause" },
1512   { V7_REASON_PARAMETER_TAG,                       "Reason" },
1513   { V7_TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" },
1514   { V7_ERROR_CODE_PARAMETER_TAG,                   "Error code" },
1515   { V7_STATUS_PARAMETER_TAG,                       "Status" },
1516   { V7_CONGESTION_INDICATION_PARAMETER_TAG,        "Congestion indication" },
1517   { V7_CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" },
1518   { V7_ROUTING_KEY_PARAMETER_TAG,                  "Routing Key" },
1519   { V7_REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" },
1520   { V7_DEREGISTRATION_RESULT_PARAMETER_TAG,        "De-registration result" },
1521   { V7_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" },
1522   { V7_DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" },
1523   { V7_SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" },
1524   { V7_SUBSYSTEM_NUMBERS_PARAMETER_TAG,            "Subsystem numbers" },
1525   { V7_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" },
1526   { V7_CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" },
1527   { V7_REGISTRATION_RESULTS_PARAMETER_TAG,         "Registration results" },
1528   { V7_DEREGISTRATION_RESULTS_PARAMETER_TAG,       "De-registration results" },
1529   { 0,                           NULL } };
1530
1531 static void
1532 dissect_v7_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1533 {
1534   guint16 tag, length, padding_length;
1535   proto_item *parameter_item;
1536   proto_tree *parameter_tree;
1537
1538   /* extract tag and length from the parameter */
1539   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1540   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1541   padding_length = tvb_length(parameter_tvb) - length;
1542
1543   if (!tree && tag != V7_PROTOCOL_DATA_1_PARAMETER_TAG && tag != V7_PROTOCOL_DATA_2_PARAMETER_TAG)
1544     return;     /* Nothing to do here */
1545
1546   /* create proto_tree stuff */
1547   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, v7_parameter_tag_values, "Unknown parameter"));
1548   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1549
1550   /* add tag and length to the parameter tree */
1551   proto_tree_add_item(parameter_tree, hf_v7_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1552   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1553
1554   switch(tag) {
1555   case V7_NETWORK_APPEARANCE_PARAMETER_TAG:
1556     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1557     break;
1558   case V7_PROTOCOL_DATA_1_PARAMETER_TAG:
1559     dissect_protocol_data_1_parameter(parameter_tvb, pinfo, tree, parameter_item);
1560     break;
1561   case V7_PROTOCOL_DATA_2_PARAMETER_TAG:
1562     dissect_protocol_data_2_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1563     break;
1564   case V7_INFO_PARAMETER_TAG:
1565     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1566     break;
1567   case V7_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1568     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1569     break;
1570   case V7_ROUTING_CONTEXT_PARAMETER_TAG:
1571     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1572     break;
1573   case V7_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1574     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1575     break;
1576   case V7_HEARTBEAT_DATA_PARAMETER_TAG:
1577     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1578     break;
1579   case V7_USER_CAUSE_PARAMETER_TAG:
1580     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1581     break;
1582   case V7_REASON_PARAMETER_TAG:
1583     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1584     break;
1585   case V7_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1586     dissect_v7_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1587     break;
1588   case V7_ERROR_CODE_PARAMETER_TAG:
1589     dissect_v7_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1590     break;
1591   case V7_STATUS_PARAMETER_TAG:
1592     dissect_v567_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1593     break;
1594   case V7_CONGESTION_INDICATION_PARAMETER_TAG:
1595     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1596     break;
1597   case V7_CONCERNED_DESTINATION_PARAMETER_TAG:
1598     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1599     break;
1600   case V7_ROUTING_KEY_PARAMETER_TAG:
1601     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1602     break;
1603   case V7_REGISTRATION_RESULT_PARAMETER_TAG:
1604     dissect_v67_registration_result_parameter(parameter_tvb, parameter_tree);
1605     break;
1606   case V7_DEREGISTRATION_RESULT_PARAMETER_TAG:
1607     dissect_v67_deregistration_result_parameter(parameter_tvb, parameter_tree);
1608     break;
1609   case V7_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1610     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1611     break;
1612   case V7_DESTINATION_POINT_CODE_PARAMETER_TAG:
1613     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1614     break;
1615   case V7_SERVICE_INDICATORS_PARAMETER_TAG:
1616     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1617     break;
1618   case V7_SUBSYSTEM_NUMBERS_PARAMETER_TAG:
1619     dissect_subsystem_numbers_parameter(parameter_tvb, parameter_tree, parameter_item);
1620     break;
1621   case V7_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1622     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1623     break;
1624   case V7_CIRCUIT_RANGE_PARAMETER_TAG:
1625     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1626     break;
1627   case V7_REGISTRATION_RESULTS_PARAMETER_TAG:
1628     dissect_registration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1629     break;
1630   case V7_DEREGISTRATION_RESULTS_PARAMETER_TAG:
1631     dissect_deregistration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1632     break;
1633   default:
1634     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1635     break;
1636   };
1637
1638   if (padding_length > 0)
1639     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1640 }
1641
1642 #define INFO_STRING_PARAMETER_TAG                  0x0004
1643 #define ROUTING_CONTEXT_PARAMETER_TAG              0x0006
1644 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG       0x0007
1645 #define HEARTBEAT_DATA_PARAMETER_TAG               0x0009
1646 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG            0x000b
1647 #define ERROR_CODE_PARAMETER_TAG                   0x000c
1648 #define STATUS_PARAMETER_TAG                       0x000d
1649 #define ASP_IDENTIFIER_PARAMETER_TAG               0x0011
1650 #define AFFECTED_POINT_CODE_PARAMETER_TAG          0x0012
1651 #define CORRELATION_IDENTIFIER_PARAMETER_TAG       0x0013
1652
1653 #define NETWORK_APPEARANCE_PARAMETER_TAG           0x0200
1654 #define USER_CAUSE_PARAMETER_TAG                   0x0204
1655 #define CONGESTION_INDICATIONS_PARAMETER_TAG       0x0205
1656 #define CONCERNED_DESTINATION_PARAMETER_TAG        0x0206
1657 #define ROUTING_KEY_PARAMETER_TAG                  0x0207
1658 #define REGISTRATION_RESULT_PARAMETER_TAG          0x0208
1659 #define DEREGISTRATION_RESULT_PARAMETER_TAG        0x0209
1660 #define LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 0x020a
1661 #define DESTINATION_POINT_CODE_PARAMETER_TAG       0x020b
1662 #define SERVICE_INDICATORS_PARAMETER_TAG           0x020c
1663 #define ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  0x020e
1664 #define CIRCUIT_RANGE_PARAMETER_TAG                0x020f
1665 #define PROTOCOL_DATA_PARAMETER_TAG                0x0210
1666 #define REGISTRATION_STATUS_PARAMETER_TAG          0x0212
1667 #define DEREGISTRATION_STATUS_PARAMETER_TAG        0x0213
1668
1669 static const value_string parameter_tag_values[] = {
1670   { INFO_STRING_PARAMETER_TAG,                  "Info string" } ,
1671   { ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" } ,
1672   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic Information" } ,
1673   { HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" } ,
1674   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" } ,
1675   { ERROR_CODE_PARAMETER_TAG,                   "Error code" } ,
1676   { STATUS_PARAMETER_TAG,                       "Status" } ,
1677   { ASP_IDENTIFIER_PARAMETER_TAG,               "ASP identifier" } ,
1678   { AFFECTED_POINT_CODE_PARAMETER_TAG,          "Affected point code" } ,
1679   { CORRELATION_IDENTIFIER_PARAMETER_TAG,       "Correlation identifier" } ,
1680   { NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" } ,
1681   { USER_CAUSE_PARAMETER_TAG,                   "User / cause" } ,
1682   { CONGESTION_INDICATIONS_PARAMETER_TAG,       "Congestion indications" } ,
1683   { CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" } ,
1684   { ROUTING_KEY_PARAMETER_TAG,                  "Routing key" } ,
1685   { REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" } ,
1686   { DEREGISTRATION_RESULT_PARAMETER_TAG,        "Deregistration result" } ,
1687   { LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" } ,
1688   { DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" } ,
1689   { SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" } ,
1690   { ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" } ,
1691   { CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" } ,
1692   { PROTOCOL_DATA_PARAMETER_TAG,                "Protocol data" } ,
1693   { REGISTRATION_STATUS_PARAMETER_TAG,          "Registration status" } ,
1694   { DEREGISTRATION_STATUS_PARAMETER_TAG,        "Deregistration status" } ,
1695   { 0,                           NULL } };
1696
1697 static void
1698 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1699 {
1700   guint16 tag, length, padding_length;
1701   proto_item *parameter_item;
1702   proto_tree *parameter_tree;
1703
1704   /* extract tag and length from the parameter */
1705   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1706   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1707   padding_length = tvb_length(parameter_tvb) - length;
1708
1709
1710   if (!tree && tag != PROTOCOL_DATA_PARAMETER_TAG)
1711     return;     /* Nothing to do here */
1712
1713   /* create proto_tree stuff */
1714   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, parameter_tag_values, "Unknown parameter"));
1715   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1716
1717   /* add tag and length to the parameter tree */
1718   proto_tree_add_item(parameter_tree, hf_parameter_tag,    parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1719   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1720
1721   switch(tag) {
1722   case INFO_STRING_PARAMETER_TAG:
1723     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1724     break;
1725   case ROUTING_CONTEXT_PARAMETER_TAG:
1726     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1727     break;
1728   case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1729     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1730     break;
1731   case HEARTBEAT_DATA_PARAMETER_TAG:
1732     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1733     break;
1734   case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1735     dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1736     break;
1737   case ERROR_CODE_PARAMETER_TAG:
1738     dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1739     break;
1740   case STATUS_PARAMETER_TAG:
1741     dissect_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1742     break;
1743   case ASP_IDENTIFIER_PARAMETER_TAG:
1744     dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1745     break;
1746   case AFFECTED_POINT_CODE_PARAMETER_TAG:
1747     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1748     break;
1749   case NETWORK_APPEARANCE_PARAMETER_TAG:
1750     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1751     break;
1752   case USER_CAUSE_PARAMETER_TAG:
1753     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1754     break;
1755   case CONGESTION_INDICATIONS_PARAMETER_TAG:
1756     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1757     break;
1758   case CONCERNED_DESTINATION_PARAMETER_TAG:
1759     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1760     break;
1761   case ROUTING_KEY_PARAMETER_TAG:
1762     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1763     break;
1764   case REGISTRATION_RESULT_PARAMETER_TAG:
1765     dissect_registration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1766     break;
1767   case DEREGISTRATION_RESULT_PARAMETER_TAG:
1768     dissect_deregistration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1769     break;
1770   case LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1771     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1772     break;
1773   case DESTINATION_POINT_CODE_PARAMETER_TAG:
1774     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1775     break;
1776   case SERVICE_INDICATORS_PARAMETER_TAG:
1777     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1778     break;
1779   case ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1780     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1781     break;
1782   case CIRCUIT_RANGE_PARAMETER_TAG:
1783     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1784     break;
1785   case PROTOCOL_DATA_PARAMETER_TAG:
1786     dissect_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1787     break;
1788   case CORRELATION_IDENTIFIER_PARAMETER_TAG:
1789     dissect_correlation_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1790     break;
1791   case REGISTRATION_STATUS_PARAMETER_TAG:
1792     dissect_registration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1793     break;
1794   case DEREGISTRATION_STATUS_PARAMETER_TAG:
1795     dissect_deregistration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1796     break;
1797   default:
1798     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1799     break;
1800   };
1801
1802   if (padding_length > 0)
1803     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1804 }
1805
1806 static void
1807 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1808 {
1809   gint offset, length, total_length, remaining_length;
1810   tvbuff_t *parameter_tvb;
1811
1812   offset = 0;
1813   while((remaining_length = tvb_length_remaining(parameters_tvb, offset))) {
1814     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
1815     total_length = ADD_PADDING(length);
1816     if (remaining_length >= length)
1817       total_length = MIN(total_length, remaining_length);
1818     /* create a tvb for the parameter including the padding bytes */
1819     parameter_tvb    = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
1820     switch(version) {
1821       case M3UA_V5:
1822         dissect_v5_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1823         break;
1824       case M3UA_V6:
1825         dissect_v6_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1826         break;
1827       case M3UA_V7:
1828         dissect_v7_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1829         break;
1830       case M3UA_RFC:
1831         dissect_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1832         break;
1833     }
1834     /* get rid of the handled parameter */
1835     offset += total_length;
1836   }
1837 }
1838
1839
1840 static void
1841 dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1842 {
1843   tvbuff_t *common_header_tvb, *parameters_tvb;
1844
1845   common_header_tvb = tvb_new_subset(message_tvb, 0, COMMON_HEADER_LENGTH, COMMON_HEADER_LENGTH);
1846   parameters_tvb    = tvb_new_subset(message_tvb, COMMON_HEADER_LENGTH, -1, -1);
1847   if (version == M3UA_V5)
1848         dissect_v5_common_header(common_header_tvb, pinfo, m3ua_tree);
1849   else
1850     dissect_common_header(common_header_tvb, pinfo, m3ua_tree);
1851
1852   /*  Need to dissect (certain) parameters even when !tree, so subdissectors
1853    *  (e.g., MTP3) are always called.
1854    */
1855   dissect_parameters(parameters_tvb, pinfo, tree, m3ua_tree);
1856 }
1857
1858 static void
1859 dissect_m3ua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
1860 {
1861   proto_item *m3ua_item;
1862   proto_tree *m3ua_tree;
1863
1864   /* make entry in the Protocol column on summary display */
1865   if (check_col(pinfo->cinfo, COL_PROTOCOL))
1866     switch(version) {
1867       case M3UA_V5:
1868         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (ID 05)");
1869         break;
1870       case M3UA_V6:
1871         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (ID 06)");
1872         break;
1873       case M3UA_V7:
1874         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (ID 07)");
1875         break;
1876       case M3UA_RFC:
1877         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (RFC 3332)");
1878         break;
1879       };
1880
1881   /* In the interest of speed, if "tree" is NULL, don't do any work not
1882      necessary to generate protocol tree items. */
1883   if (tree) {
1884     /* create the m3ua protocol tree */
1885     m3ua_item = proto_tree_add_item(tree, proto_m3ua, message_tvb, 0, -1, FALSE);
1886     m3ua_tree = proto_item_add_subtree(m3ua_item, ett_m3ua);
1887   } else {
1888     m3ua_tree = NULL;
1889   };
1890
1891   /* dissect the message */
1892   dissect_message(message_tvb, pinfo, tree, m3ua_tree);
1893 }
1894
1895 /* Register the protocol with Ethereal */
1896 void
1897 proto_register_m3ua(void)
1898 {
1899
1900   /* Setup list of header fields */
1901   static hf_register_info hf[] = {
1902     { &hf_version,                          { "Version",                      "m3ua.version",                               FT_UINT8,  BASE_DEC,  VALS(protocol_version_values),                0x0, "", HFILL } },
1903     { &hf_reserved,                         { "Reserved",                     "m3ua.reserved",                              FT_UINT8,  BASE_HEX,  NULL,                                         0x0, "", HFILL } },
1904     { &hf_v5_message_class,                 { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(v5_message_class_values),                0x0, "", HFILL } },
1905     { &hf_message_class,                    { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(message_class_values),                   0x0, "", HFILL } },
1906     { &hf_message_type,                     { "Message Type",                 "m3ua.message_type",                          FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1907     { &hf_message_length,                   { "Message length",               "m3ua.message_length",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1908     { &hf_v5_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v5_parameter_tag_values),                0x0, "", HFILL } },
1909     { &hf_v6_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v6_parameter_tag_values),                0x0, "", HFILL } },
1910     { &hf_v7_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v7_parameter_tag_values),                0x0, "", HFILL } },
1911     { &hf_parameter_tag,                    { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(parameter_tag_values),                   0x0, "", HFILL } },
1912     { &hf_parameter_length,                 { "Parameter length",             "m3ua.parameter_length",                      FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1913     { &hf_parameter_value,                  { "Parameter value",              "m3ua.parameter_value",                       FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1914     { &hf_parameter_padding,                { "Padding",                      "m3ua.parameter_padding",                     FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1915     { &hf_parameter_trailer,                { "Trailer",                      "m3ua.paramter_trailer",                      FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1916     { &hf_network_appearance,               { "Network appearance",           "m3ua.network_appearance",                    FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1917     { &hf_info_string,                      { "Info string",                  "m3ua.info_string",                           FT_STRING, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1918     { &hf_routing_context,                  { "Routing context",              "m3ua.routing_context",                       FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1919     { &hf_diagnostic_information,           { "Diagnostic information",       "m3ua.diagnostic_information",                FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1920     { &hf_heartbeat_data,                   { "Heartbeat data",               "m3ua.heartbeat_data",                        FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1921     { &hf_v5_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v5_error_code_values),                   0x0, "", HFILL } },
1922     { &hf_v6_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v6_error_code_values),                   0x0, "", HFILL } },
1923     { &hf_v7_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v7_error_code_values),                   0x0, "", HFILL } },
1924     { &hf_error_code,                       { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(error_code_values),                      0x0, "", HFILL } },
1925     { &hf_status_type,                      { "Status type",                  "m3ua.status_type",                           FT_UINT16, BASE_DEC,  VALS(status_type_values),                     0x0, "", HFILL } },
1926     { &hf_status_info,                      { "Status info",                  "m3ua.status_info",                           FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1927     { &hf_asp_identifier,                   { "ASP identifier",               "m3ua.asp_identifier",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1928     { &hf_affected_point_code_mask,         { "Mask",                         "m3ua.affected_point_code_mask",              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1929     { &hf_affected_point_code_pc,           { "Affected point code",          "m3ua.affected_point_code_pc",                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1930     { &hf_cause,                            { "Unavailability cause",         "m3ua.unavailability_cause",                  FT_UINT16, BASE_DEC,  VALS(unavailability_cause_values),            0x0, "", HFILL } },
1931     { &hf_user,                             { "User Identity",                "m3ua.user_identity",                         FT_UINT16, BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1932     { &hf_reason,                           { "Reason",                       "m3ua.reason",                                FT_UINT32, BASE_DEC,  VALS(reason_values),                          0x0, "", HFILL } },
1933     { &hf_v5_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v5_traffic_mode_type_values),            0x0, "", HFILL } },
1934     { &hf_v6_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v6_traffic_mode_type_values),            0x0, "", HFILL } },
1935     { &hf_v7_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v7_traffic_mode_type_values),            0x0, "", HFILL } },
1936     { &hf_traffic_mode_type,                { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(traffic_mode_type_values),               0x0, "", HFILL } },
1937     { &hf_congestion_reserved,              { "Reserved",                     "m3ua.congestion_reserved",                   FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1938     { &hf_congestion_level,                 { "Congestion level",             "m3ua.congestion_level",                      FT_UINT8,  BASE_DEC,  VALS(congestion_level_values),                0x0, "", HFILL } },
1939     { &hf_concerned_dest_reserved,          { "Reserved",                     "m3ua.concerned_reserved",                    FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1940     { &hf_concerned_dest_pc,                { "Concerned DPC",                "m3ua.concerned_dpc",                         FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1941     { &hf_local_rk_identifier,              { "Local routing key identifier", "m3ua.local_rk_identifier",                   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1942     { &hf_dpc_mask,                         { "Mask",                         "m3ua.dpc_mask",                              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1943     { &hf_dpc_pc,                           { "Destination point code",       "m3ua.dpc_pc",                                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1944     { &hf_si,                               { "Service indicator",            "m3ua.si",                                    FT_UINT8,  BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1945     { &hf_ssn,                              { "Subsystem number",             "m3ua.ssn",                                   FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1946     { &hf_opc_list_mask,                    { "Mask",                         "m3ua.opc_list_mask",                         FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1947     { &hf_opc_list_pc,                      { "Originating point code",       "m3ua.opc_list_pc",                           FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1948     { &hf_cic_range_mask,                   { "Mask",                         "m3ua.cic_range_mask",                        FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1949     { &hf_cic_range_pc,                     { "Originating point code",       "m3ua.cic_range_pc",                          FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1950     { &hf_cic_range_lower,                  { "Lower CIC value",              "m3ua.cic_range_lower",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1951     { &hf_cic_range_upper,                  { "Upper CIC value",              "m3ua.cic_range_upper",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1952     { &hf_li,                               { "Length indicator",             "m3ua.protocol_data_2_li",                    FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1953     { &hf_protocol_data_opc,                { "OPC",                          "m3ua.protocol_data_opc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1954     { &hf_protocol_data_dpc,                { "DPC",                          "m3ua.protocol_data_dpc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1955     { &hf_protocol_data_si,                 { "SI",                           "m3ua.protocol_data_si",                      FT_UINT8,  BASE_DEC,  VALS(user_identity_values),                                         0x0, "", HFILL } },
1956     { &hf_protocol_data_ni,                 { "NI",                           "m3ua.protocol_data_ni",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1957     { &hf_protocol_data_mp,                 { "MP",                           "m3ua.protocol_data_mp",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1958     { &hf_protocol_data_sls,                { "SLS",                          "m3ua.protocol_data_sls",                     FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1959     { &hf_correlation_identifier,           { "Correlation Identifier",       "m3ua.correlation_identifier",                FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1960     { &hf_registration_status,              { "Registration status",          "m3ua.registration_status",                   FT_UINT32, BASE_DEC,  VALS(registration_status_values),             0x0, "", HFILL } },
1961     { &hf_deregistration_status,            { "Deregistration status",        "m3ua.deregistration_status",                 FT_UINT32, BASE_DEC,  VALS(deregistration_status_values),           0x0, "", HFILL } },
1962     { &hf_registration_result_identifier,   { "Local RK-identifier value",    "m3ua.registration_result_identifier",        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1963     { &hf_registration_result_status,       { "Registration status",          "m3ua.registration_results_status",           FT_UINT32, BASE_DEC,  VALS(registration_result_status_values),      0x0, "", HFILL } },
1964     { &hf_registration_result_context,      { "Routing context",              "m3ua.registration_result_routing_context",   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1965     { &hf_v6_deregistration_result_status,  { "De-Registration status",       "m3ua.deregistration_results_status",         FT_UINT32, BASE_DEC,  VALS(v6_deregistration_result_status_values), 0x0, "", HFILL } },
1966     { &hf_v6_deregistration_result_context, { "Routing context",              "m3ua.deregistration_result_routing_context", FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1967   };
1968
1969   /* Setup protocol subtree array */
1970   static gint *ett[] = {
1971     &ett_m3ua,
1972     &ett_parameter,
1973   };
1974
1975   static enum_val_t options[] = {
1976     { "draft-5", "Internet Draft version 5",        M3UA_V5  },
1977     { "draft-6", "Internet Draft version 6",        M3UA_V6  },
1978     { "draft-7", "Internet Draft version 7",        M3UA_V7  },
1979     { "rfc3332", "RFC 3332",                        M3UA_RFC },
1980     { NULL, NULL, 0 }
1981   };
1982
1983   /* Register the protocol name and description */
1984   proto_m3ua = proto_register_protocol("MTP 3 User Adaptation Layer", "M3UA",  "m3ua");
1985   m3ua_module = prefs_register_protocol(proto_m3ua, NULL);
1986   prefs_register_enum_preference(m3ua_module, "version", "M3UA Version", "Version used by Ethereal", &version, options, FALSE);
1987
1988   /* Required function calls to register the header fields and subtrees used */
1989   proto_register_field_array(proto_m3ua, hf, array_length(hf));
1990   proto_register_subtree_array(ett, array_length(ett));
1991   si_dissector_table = register_dissector_table("m3ua.protocol_data_si", "MTP3 Service indicator", FT_UINT8, BASE_HEX);
1992
1993 }
1994
1995 void
1996 proto_reg_handoff_m3ua(void)
1997 {
1998   dissector_handle_t m3ua_handle;
1999
2000   /*
2001    * Get a handle for the MTP3 dissector.
2002    */
2003   mtp3_handle = find_dissector("mtp3");
2004   data_handle = find_dissector("data");
2005   m3ua_handle = create_dissector_handle(dissect_m3ua, proto_m3ua);
2006   dissector_add("sctp.ppi",  M3UA_PAYLOAD_PROTOCOL_ID, m3ua_handle);
2007   dissector_add("sctp.port", SCTP_PORT_M3UA, m3ua_handle);
2008 }