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/rfc/rfc3332.txt
   7  *
   8  * Copyright 2000, 2001, 2002, 2003 Michael Tuexen <Michael.Tuexen [AT] siemens.com>
   9  *
  10  * $Id: packet-m3ua.c,v 1.28 2003/02/18 19:48:31 tuexen Exp $
  11  *
  12  * Ethereal - Network traffic analyzer
  13  * By Gerald Combs <gerald@ethereal.com>
  14  * Copyright 1998 Gerald Combs
  15  *
  16  * Copied from README.developer
  17  *
  18  * This program is free software; you can redistribute it and/or
  19  * modify it under the terms of the GNU General Public License
  20  * as published by the Free Software Foundation; either version 2
  21  * of the License, or (at your option) any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  31  */
  32
  33 #ifdef HAVE_CONFIG_H
  34 # include "config.h"
  35 #endif
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39
  40
  41 #include <string.h>
  42 #include <glib.h>
  43
  44 #include <epan/packet.h>
  45 #include "prefs.h"
  46 #include "sctpppids.h"
  47
  48 #define SCTP_PORT_M3UA         2905
  49 #define NETWORK_BYTE_ORDER     FALSE
  50 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
  51
  52 #define VERSION_LENGTH         1
  53 #define RESERVED_LENGTH        1
  54 #define MESSAGE_CLASS_LENGTH   1
  55 #define MESSAGE_TYPE_LENGTH    1
  56 #define MESSAGE_LENGTH_LENGTH  4
  57 #define COMMON_HEADER_LENGTH   (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
  58                                 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
  59
  60 #define VERSION_OFFSET         0
  61 #define RESERVED_OFFSET        (VERSION_OFFSET + VERSION_LENGTH)
  62 #define MESSAGE_CLASS_OFFSET   (RESERVED_OFFSET + RESERVED_LENGTH)
  63 #define MESSAGE_TYPE_OFFSET    (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
  64 #define MESSAGE_LENGTH_OFFSET  (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
  65
  66 #define PARAMETER_TAG_LENGTH    2
  67 #define PARAMETER_LENGTH_LENGTH 2
  68 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
  69
  70 #define PARAMETER_TAG_OFFSET    0
  71 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
  72 #define PARAMETER_VALUE_OFFSET  (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
  73 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
  74
  75 #define PROTOCOL_VERSION_RELEASE_1             1
  76
  77 static const value_string protocol_version_values[] = {
  78   { PROTOCOL_VERSION_RELEASE_1,  "Release 1" },
  79   { 0,                           NULL } };
  80
  81 #define MESSAGE_CLASS_MGMT_MESSAGE        0
  82 #define MESSAGE_CLASS_TFER_MESSAGE        1
  83 #define MESSAGE_CLASS_SSNM_MESSAGE        2
  84 #define MESSAGE_CLASS_ASPSM_MESSAGE       3
  85 #define MESSAGE_CLASS_ASPTM_MESSAGE       4
  86 #define MESSAGE_CLASS_RKM_MESSAGE         9
  87
  88 static const value_string message_class_values[] = {
  89   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
  90   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
  91   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
  92   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
  93   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
  94   { MESSAGE_CLASS_RKM_MESSAGE,    "Routing key management messages" },
  95   { 0,                           NULL } };
  96
  97 static const value_string v5_message_class_values[] = {
  98   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
  99   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
 100   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
 101   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
 102   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
 103   { 0,                           NULL } };
 104
 105 #define MESSAGE_TYPE_ERR                  0
 106 #define MESSAGE_TYPE_NTFY                 1
 107
 108 #define MESSAGE_TYPE_DATA                 1
 109
 110 #define MESSAGE_TYPE_DUNA                 1
 111 #define MESSAGE_TYPE_DAVA                 2
 112 #define MESSAGE_TYPE_DAUD                 3
 113 #define MESSAGE_TYPE_SCON                 4
 114 #define MESSAGE_TYPE_DUPU                 5
 115 #define MESSAGE_TYPE_DRST                 6
 116
 117 #define MESSAGE_TYPE_UP                   1
 118 #define MESSAGE_TYPE_DOWN                 2
 119 #define MESSAGE_TYPE_BEAT                 3
 120 #define MESSAGE_TYPE_UP_ACK               4
 121 #define MESSAGE_TYPE_DOWN_ACK             5
 122 #define MESSAGE_TYPE_BEAT_ACK             6
 123
 124 #define MESSAGE_TYPE_ACTIVE               1
 125 #define MESSAGE_TYPE_INACTIVE             2
 126 #define MESSAGE_TYPE_ACTIVE_ACK           3
 127 #define MESSAGE_TYPE_INACTIVE_ACK         4
 128
 129 #define MESSAGE_TYPE_REG_REQ              1
 130 #define MESSAGE_TYPE_REG_RSP              2
 131 #define MESSAGE_TYPE_DEREG_REQ            3
 132 #define MESSAGE_TYPE_DEREG_RSP            4
 133
 134 static const value_string v5_message_class_type_values[] = {
 135   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 136   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 137   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 138   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 139   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 140   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 141   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 142   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 143   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (UP)" },
 144   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (DOWN)" },
 145   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 146   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (UP ACK)" },
 147   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (DOWN ACK)" },
 148   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT ACK)" },
 149   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ACTIVE)" },
 150   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (INACTIVE)" },
 151   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ACTIVE ACK)" },
 152   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (INACTIVE ACK)" },
 153   { 0,                                                              NULL } };
 154
 155 static const value_string message_class_type_values[] = {
 156   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 157   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 158   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 159   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 160   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 161   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 162   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 163   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 164   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "Destination Restricted (DRST)" },
 165   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (ASPUP)" },
 166   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (ASPDN)" },
 167   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 168   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (ASPUP_ACK)" },
 169   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (ASPDN_ACK)" },
 170   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT_ACK)" },
 171   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ASPAC)" },
 172   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (ASPIA)" },
 173   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ASPAC_ACK)" },
 174   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (ASPIA_ACK)" },
 175   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "Registration request (REG_REQ)" },
 176   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "Registration response (REG_RSP)" },
 177   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "Deregistration request (DEREG_REQ)" },
 178   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "Deregistration response (DEREG_RSP)" },
 179   { 0,                           NULL } };
 180
 181 static const value_string v5_message_class_type_acro_values[] = {
 182   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 183   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 184   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 185   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 186   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 187   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 188   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 189   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 190   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP_UP" },
 191   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP_DOWN" },
 192   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 193   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP_UP_ACK" },
 194   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP_DOWN_ACK" },
 195   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 196   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP_ACTIVE" },
 197   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP_INACTIVE" },
 198   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP_ACTIVE_ACK" },
 199   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
 200   { 0,                                                              NULL } };
 201
 202 static const value_string message_class_type_acro_values[] = {
 203   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 204   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 205   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 206   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 207   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 208   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 209   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 210   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 211   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "DRST" },
 212   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASPUP" },
 213   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASPDN" },
 214   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 215   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASPUP_ACK" },
 216   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASPDN_ACK" },
 217   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 218   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASPAC" },
 219   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASPIA" },
 220   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASPAC_ACK" },
 221   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASPIA_ACK" },
 222   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "REG_REQ" },
 223   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "REG_RSP" },
 224   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "DEREG_REQ" },
 225   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "DEREG_RSP" },
 226   { 0,                           NULL } };
 227
 228
 229
 230
 231
 232 #define PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
 233
 234
 235
 236 #define TRAFFIC_MODE_TYPE_LENGTH 4
 237 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 238
 239 /* Initialize the protocol and registered fields */
 240 static int proto_m3ua = -1;
 241 static int hf_version = -1;
 242 static int hf_reserved = -1;
 243 static int hf_message_class = -1;
 244 static int hf_v5_message_class = -1;
 245 static int hf_message_type = -1;
 246 static int hf_message_length = -1;
 247 static int hf_v5_parameter_tag = -1;
 248 static int hf_v6_parameter_tag = -1;
 249 static int hf_parameter_tag = -1;
 250 static int hf_parameter_length = -1;
 251 static int hf_parameter_value = -1;
 252 static int hf_parameter_padding = -1;
 253 static int hf_parameter_trailer = -1;
 254 static int hf_network_appearance = -1;
 255 static int hf_info_string = -1;
 256 static int hf_routing_context = -1;
 257 static int hf_diagnostic_information = -1;
 258 static int hf_heartbeat_data = -1;
 259 static int hf_v5_error_code = -1;
 260 static int hf_v6_error_code = -1;
 261 static int hf_error_code = -1;
 262 static int hf_status_type = -1;
 263 static int hf_status_info = -1;
 264 static int hf_asp_identifier = -1;
 265 static int hf_affected_point_code_mask = -1;
 266 static int hf_affected_point_code_pc = -1;
 267 static int hf_cause = -1;
 268 static int hf_user = -1;
 269 static int hf_reason = -1;
 270 static int hf_v5_traffic_mode_type = -1;
 271 static int hf_v6_traffic_mode_type = -1;
 272 static int hf_traffic_mode_type = -1;
 273 static int hf_congestion_reserved = -1;
 274 static int hf_congestion_level = -1;
 275 static int hf_concerned_dest_reserved = -1;
 276 static int hf_concerned_dest_pc = -1;
 277 static int hf_local_rk_identifier = -1;
 278 static int hf_dpc_mask = -1;
 279 static int hf_dpc_pc = -1;
 280 static int hf_si = -1;
 281 static int hf_ssn = -1;
 282 static int hf_opc_list_mask = -1;
 283 static int hf_opc_list_pc = -1;
 284 static int hf_cic_range_mask = -1;
 285 static int hf_cic_range_pc = -1;
 286 static int hf_cic_range_upper = -1;
 287 static int hf_cic_range_lower = -1;
 288 static int hf_protocol_data_opc = -1;
 289 static int hf_protocol_data_dpc = -1;
 290 static int hf_protocol_data_si = -1;
 291 static int hf_protocol_data_ni = -1;
 292 static int hf_protocol_data_mp = -1;
 293 static int hf_protocol_data_sls = -1;
 294 static int hf_correlation_identifier = -1;
 295 static int hf_registration_status = -1;
 296 static int hf_deregistration_status = -1;
 297 static int hf_registration_result_identifier = -1;
 298 static int hf_registration_result_status = -1;
 299 static int hf_registration_result_context = -1;
 300 static int hf_v6_deregistration_result_status = -1;
 301 static int hf_v6_deregistration_result_context = -1;
 302 static int hf_li = -1;
 303
 304 /* Initialize the subtree pointers */
 305 static gint ett_m3ua = -1;
 306 static gint ett_parameter = -1;
 307
 308 static module_t *m3ua_module;
 309 static dissector_handle_t mtp3_handle, data_handle;
 310 static dissector_table_t si_dissector_table;
 311
 312 /* stuff for supporting multiple versions */
 313 typedef enum {
 314   M3UA_V5,
 315   M3UA_V6,
 316   M3UA_RFC
 317 } Version_Type;
 318
 319 static Version_Type version = M3UA_RFC;
 320
 321 static void
 322 dissect_parameters(tvbuff_t *, packet_info *, proto_tree *, proto_tree *);
 323
 324 static void
 325 dissect_v5_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 326 {
 327   guint8  message_class, message_type;
 328
 329   /* Extract the common header */
 330   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 331   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 332
 333   if (check_col(pinfo->cinfo, COL_INFO)) {
 334     col_append_str(pinfo->cinfo, COL_INFO, val_to_str(message_class * 256 + message_type, v5_message_class_type_acro_values, "reserved"));
 335     col_append_str(pinfo->cinfo, COL_INFO, " ");
 336   }
 337
 338   if (m3ua_tree) {
 339     /* add the components of the common header to the protocol tree */
 340     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 341     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 342     proto_tree_add_item(m3ua_tree, hf_v5_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 343     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 344                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, v5_message_class_type_values, "reserved"), message_type);
 345     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 346   }
 347 }
 348
 349 static void
 350 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 351 {
 352   guint8  message_class, message_type;
 353
 354   /* Extract the common header */
 355   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 356   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 357
 358   if (check_col(pinfo->cinfo, COL_INFO)) {
 359     col_append_str(pinfo->cinfo, COL_INFO, val_to_str(message_class * 256 + message_type, message_class_type_acro_values, "reserved"));
 360     col_append_str(pinfo->cinfo, COL_INFO, " ");
 361   }
 362
 363   if (m3ua_tree) {
 364     /* add the components of the common header to the protocol tree */
 365     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 366     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 367     proto_tree_add_item(m3ua_tree, hf_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 368     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 369                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, message_class_type_values, "reserved"), message_type);
 370     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 371   }
 372 }
 373
 374 #define NETWORK_APPEARANCE_LENGTH 4
 375 #define NETWORK_APPEARANCE_OFFSET PARAMETER_VALUE_OFFSET
 376
 377 static void
 378 dissect_network_appearance_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 379 {
 380   proto_tree_add_item(parameter_tree, hf_network_appearance, parameter_tvb, NETWORK_APPEARANCE_OFFSET, NETWORK_APPEARANCE_LENGTH, NETWORK_BYTE_ORDER);
 381   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, NETWORK_APPEARANCE_OFFSET));
 382 }
 383
 384 static void
 385 dissect_v5_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 386 {
 387   guint16 length, protocol_data_length;
 388   tvbuff_t *payload_tvb;
 389
 390   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 391   protocol_data_length = length - PARAMETER_HEADER_LENGTH;
 392   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_OFFSET, protocol_data_length, protocol_data_length);
 393   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 394   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 395   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 396 }
 397
 398 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
 399
 400 static void
 401 dissect_info_string_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 402 {
 403   guint16 info_string_length;
 404
 405   info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 406   proto_tree_add_item(parameter_tree, hf_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, NETWORK_BYTE_ORDER);
 407   proto_item_append_text(parameter_item, " (%.*s)", info_string_length,
 408                          (const char *)tvb_get_ptr(parameter_tvb, INFO_STRING_OFFSET, info_string_length));
 409 }
 410
 411 #define AFFECTED_MASK_LENGTH 1
 412 #define AFFECTED_DPC_LENGTH  3
 413 #define AFFECTED_DESTINATION_LENGTH (AFFECTED_MASK_LENGTH + AFFECTED_DPC_LENGTH)
 414
 415 #define AFFECTED_MASK_OFFSET 0
 416 #define AFFECTED_DPC_OFFSET  1
 417
 418 static void
 419 dissect_affected_destinations_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 420 {
 421   guint16 number_of_destinations, destination_number;
 422   gint destination_offset;
 423
 424   number_of_destinations = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 425   destination_offset = PARAMETER_VALUE_OFFSET;
 426   for(destination_number=1; destination_number <= number_of_destinations; destination_number++) {
 427     proto_tree_add_item(parameter_tree, hf_affected_point_code_mask, parameter_tvb, destination_offset + AFFECTED_MASK_OFFSET, AFFECTED_MASK_LENGTH, NETWORK_BYTE_ORDER);
 428     proto_tree_add_item(parameter_tree, hf_affected_point_code_pc,   parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET,  AFFECTED_DPC_LENGTH,  NETWORK_BYTE_ORDER);
 429     destination_offset += AFFECTED_DESTINATION_LENGTH;
 430   }
 431   proto_item_append_text(parameter_item, " (%u destination%s)", number_of_destinations, plurality(number_of_destinations, "", "s"));
 432 }
 433
 434 #define ROUTING_CONTEXT_LENGTH 4
 435
 436 static void
 437 dissect_routing_context_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 438 {
 439   guint16 number_of_contexts, context_number;
 440   gint context_offset;
 441
 442   number_of_contexts = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 443   context_offset = PARAMETER_VALUE_OFFSET;
 444   for(context_number=1; context_number <= number_of_contexts; context_number++) {
 445     proto_tree_add_item(parameter_tree, hf_routing_context, parameter_tvb, context_offset, ROUTING_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 446     context_offset += ROUTING_CONTEXT_LENGTH;
 447   };
 448   proto_item_append_text(parameter_item, " (%u context%s)", number_of_contexts, plurality(number_of_contexts, "", "s"));
 449 }
 450
 451 #define DIAGNOSTIC_INFO_OFFSET PARAMETER_VALUE_OFFSET
 452
 453 static void
 454 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 455 {
 456   guint16 diag_info_length;
 457
 458   diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 459   proto_tree_add_item(parameter_tree, hf_diagnostic_information, parameter_tvb, DIAGNOSTIC_INFO_OFFSET, diag_info_length, NETWORK_BYTE_ORDER);
 460   proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
 461 }
 462
 463 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
 464
 465 static void
 466 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 467 {
 468   guint16 heartbeat_data_length;
 469
 470   heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 471   proto_tree_add_item(parameter_tree, hf_heartbeat_data, parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, NETWORK_BYTE_ORDER);
 472   proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
 473 }
 474
 475 #define UNKNOWN_UNAVAIL_CAUSE                  0
 476 #define UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE   1
 477 #define INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE 2
 478
 479 static const value_string unavailability_cause_values[] = {
 480   { UNKNOWN_UNAVAIL_CAUSE,                  "Unknown"                  },
 481   { UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE,   "Unequipped remote user"   },
 482   { INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE, "Inaccessable remote user" },
 483   {0,                                       NULL } };
 484
 485 #define RESERVED_0_USER_ID                0
 486 #define RESERVED_1_USER_ID                1
 487 #define RESERVED_2_USER_ID                2
 488 #define SCCP_USER_ID                      3
 489 #define TUP_USER_ID                       4
 490 #define ISUP_USER_ID                      5
 491 #define RESERVED_6_USER_ID                6
 492 #define RESERVED_7_USER_ID                7
 493 #define RESERVED_8_USER_ID                8
 494 #define BROADBAND_ISUP_USER_ID            9
 495 #define SATELLITE_ISUP_USER_ID           10
 496
 497 static const value_string user_identity_values[] = {
 498   { RESERVED_0_USER_ID,     "Reserved"       },
 499   { RESERVED_1_USER_ID,     "Reserved"       },
 500   { RESERVED_2_USER_ID,     "Reserved"       },
 501   { SCCP_USER_ID,           "SCCP"           },
 502   { TUP_USER_ID,            "TUP"            },
 503   { ISUP_USER_ID,           "ISUP"           },
 504   { RESERVED_6_USER_ID,     "Reserved"       },
 505   { RESERVED_7_USER_ID,     "Reserved"       },
 506   { RESERVED_8_USER_ID,     "Reserved"       },
 507   { BROADBAND_ISUP_USER_ID, "Broadband ISUP" },
 508   { SATELLITE_ISUP_USER_ID, "Satellite ISUP" },
 509   {0,                       NULL             } };
 510
 511 #define CAUSE_LENGTH 2
 512 #define USER_LENGTH  2
 513
 514 #define CAUSE_OFFSET  PARAMETER_VALUE_OFFSET
 515 #define USER_OFFSET   (CAUSE_OFFSET + CAUSE_LENGTH)
 516
 517 static void
 518 dissect_user_cause_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 519 {
 520   proto_tree_add_item(parameter_tree, hf_cause, parameter_tvb, CAUSE_OFFSET, CAUSE_LENGTH, NETWORK_BYTE_ORDER);
 521   proto_tree_add_item(parameter_tree, hf_user,  parameter_tvb, USER_OFFSET,  USER_LENGTH,  NETWORK_BYTE_ORDER);
 522   proto_item_append_text(parameter_item, " (%s: %s)",
 523                          val_to_str(tvb_get_ntohs(parameter_tvb, USER_OFFSET),  user_identity_values,        "Unknown user"),
 524                          val_to_str(tvb_get_ntohs(parameter_tvb, CAUSE_OFFSET), unavailability_cause_values, "unknown cause"));
 525 }
 526
 527 #define UNSPECIFIED_REASON          0
 528 #define USER_UNAVAILABLE_REASON     1
 529 #define MANAGEMENT_BLOCKING_REASON  2
 530
 531 static const value_string reason_values[] = {
 532   { UNSPECIFIED_REASON,         "Unspecified" },
 533   { USER_UNAVAILABLE_REASON,    "User unavailable" },
 534   { MANAGEMENT_BLOCKING_REASON, "Management blocking" },
 535   {0,                           NULL } };
 536
 537 #define REASON_LENGTH 4
 538 #define REASON_OFFSET PARAMETER_VALUE_OFFSET
 539
 540 static void
 541 dissect_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 542 {
 543   proto_tree_add_item(parameter_tree, hf_reason, parameter_tvb, REASON_OFFSET, REASON_LENGTH, NETWORK_BYTE_ORDER);
 544   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REASON_OFFSET), reason_values, "unknown"));
 545 }
 546
 547 static const value_string v5_traffic_mode_type_values[] = {
 548   { 1, "Over-ride"            },
 549   { 2, "Load-share"           },
 550   { 3, "Over-ride (standby)"  },
 551   { 4, "Load-share (standby)" },
 552   { 0, NULL                   } };
 553
 554 static void
 555 dissect_v5_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 556 {
 557   proto_tree_add_item(parameter_tree, hf_v5_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 558   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"));
 559 }
 560
 561 static const value_string v6_traffic_mode_type_values[] = {
 562   { 1, "Over-ride"            },
 563   { 2, "Load-share"           },
 564   { 3, "Over-ride (standby)"  },
 565   { 4, "Load-share (standby)" },
 566   { 0, NULL                   } };
 567
 568 static void
 569 dissect_v6_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 570 {
 571   proto_tree_add_item(parameter_tree, hf_v6_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 572   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"));
 573 }
 574
 575 static const value_string traffic_mode_type_values[] = {
 576   { 1, "Over-ride"  },
 577   { 2, "Load-share" },
 578   { 3, "Broadcast"  },
 579   { 0, NULL         } };
 580
 581 static void
 582 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 583 {
 584   proto_tree_add_item(parameter_tree, hf_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 585   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), traffic_mode_type_values, "unknown"));
 586 }
 587
 588 #define ERROR_CODE_LENGTH 4
 589 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
 590
 591 static const value_string v5_error_code_values[] = {
 592   {  1, "Invalid version"               },
 593   {  2, "Invalid network appearance"    },
 594   {  3, "Unsupported message class"     },
 595   {  4, "Unsupported message type"      },
 596   {  5, "Invalid traffic handling mode" },
 597   {  6, "Unexpected message"            },
 598   {  7, "Protocol error"                },
 599   {  8, "Invalid routing context"       },
 600   {  0,  NULL                           } };
 601
 602 static void
 603 dissect_v5_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 604 {
 605   proto_tree_add_item(parameter_tree, hf_v5_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 606   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v5_error_code_values, "unknown"));
 607 }
 608
 609 static const value_string v6_error_code_values[] = {
 610   {  1, "Invalid version"               },
 611   {  2, "Invalid network appearance"    },
 612   {  3, "Unsupported message class"     },
 613   {  4, "Unsupported message type"      },
 614   {  5, "Invalid traffic handling mode" },
 615   {  6, "Unexpected message"            },
 616   {  7, "Protocol error"                },
 617   {  8, "Invalid routing context"       },
 618   {  9, "Invalid stream identifier"     },
 619   { 10, "Invalid parameter value"       },
 620   {  0,  NULL                           } };
 621
 622
 623 static void
 624 dissect_v6_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 625 {
 626   proto_tree_add_item(parameter_tree, hf_v6_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 627   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v6_error_code_values, "unknown"));
 628 }
 629
 630 static const value_string error_code_values[] = {
 631   { 0x01, "Invalid version"                   },
 632   { 0x03, "Unsupported message class"         },
 633   { 0x04, "Unsupported message type"          },
 634   { 0x05, "Unsupported traffic handling mode" },
 635   { 0x06, "Unexpected message"                },
 636   { 0x07, "Protocol error"                    },
 637   { 0x09, "Invalid stream identifier"         },
 638   { 0x0d, "Refused - management blocking"     },
 639   { 0x0e, "ASP identifier required"           },
 640   { 0x0f, "Invalid ASP identifier"            },
 641   { 0x11, "Invalid parameter value"           },
 642   { 0x12, "Parameter field error"             },
 643   { 0x13, "Unexpected parameter"              },
 644   { 0x14, "Destination status unknown"        },
 645   { 0x15, "Invalid network appearance"        },
 646   { 0x16, "Missing parameter"                 },
 647   { 0x19, "Invalid routing context"           },
 648   { 0x1a, "No configured AS for ASP"          },
 649   { 0,    NULL                                } };
 650
 651 static void
 652 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 653 {
 654   proto_tree_add_item(parameter_tree, hf_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 655   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), error_code_values, "unknown"));
 656 }
 657
 658 #define AS_STATE_CHANGE_TYPE       1
 659 #define OTHER_TYPE                 2
 660
 661 static const value_string status_type_values[] = {
 662   { AS_STATE_CHANGE_TYPE,            "Application server state change" },
 663   { OTHER_TYPE,                      "Other" },
 664   { 0,                           NULL } };
 665
 666 #define RESERVED_INFO              1
 667 #define AS_INACTIVE_INFO           2
 668 #define AS_ACTIVE_INFO             3
 669 #define AS_PENDING_INFO            4
 670
 671 #define INSUFFICIENT_ASP_RES_INFO  1
 672 #define ALTERNATE_ASP_ACTIVE_INFO  2
 673 #define ASP_FAILURE_INFO           3
 674
 675 static const value_string v56_status_type_info_values[] = {
 676   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 677   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 678   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 679   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 680   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 681   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 682   {0,                           NULL } };
 683
 684
 685 #define STATUS_TYPE_LENGTH 2
 686 #define STATUS_INFO_LENGTH 2
 687
 688 #define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 689 #define STATUS_INFO_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
 690
 691 static void
 692 dissect_v56_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 693 {
 694   guint16 status_type, status_info;
 695
 696   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 697   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 698
 699   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 700   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 701                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, v56_status_type_info_values, "unknown"), status_info);
 702
 703   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, v56_status_type_info_values, "unknown status information"));
 704 }
 705
 706 static const value_string status_type_info_values[] = {
 707   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 708   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 709   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 710   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 711   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 712   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 713   { OTHER_TYPE           * 256 * 256 + ASP_FAILURE_INFO,          "ASP Failure" },
 714   {0,                           NULL } };
 715
 716 static void
 717 dissect_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 718 {
 719   guint16 status_type, status_info;
 720
 721   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 722   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 723
 724   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 725   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 726                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown"), status_info);
 727
 728   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown status information"));
 729 }
 730
 731 static const value_string congestion_level_values[] = {
 732   { 0, "No congestion or undefined" },
 733   { 1, "Congestion level 1"         },
 734   { 2, "Congestion level 2"         },
 735   { 3, "Congestion level 3"         },
 736   { 0, NULL                         } };
 737
 738 #define CONG_IND_RESERVED_LENGTH    3
 739 #define CONG_IND_LEVEL_LENGTH       1
 740
 741 #define CONG_IND_RESERVED_OFFSET     PARAMETER_VALUE_OFFSET
 742 #define CONG_IND_LEVEL_OFFSET        (CONG_IND_RESERVED_OFFSET + CONG_IND_RESERVED_LENGTH)
 743
 744 static void
 745 dissect_congestion_indication_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 746 {
 747   proto_tree_add_item(parameter_tree, hf_congestion_reserved, parameter_tvb, CONG_IND_RESERVED_OFFSET, CONG_IND_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 748   proto_tree_add_item(parameter_tree, hf_congestion_level,    parameter_tvb, CONG_IND_LEVEL_OFFSET,    CONG_IND_LEVEL_LENGTH,    NETWORK_BYTE_ORDER);
 749   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_guint8(parameter_tvb, CONG_IND_LEVEL_OFFSET), congestion_level_values, "unknown"));
 750 }
 751
 752 #define ASP_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 753 #define ASP_IDENTIFIER_LENGTH  4
 754
 755 static void
 756 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 757 {
 758   proto_tree_add_item(parameter_tree, hf_asp_identifier, parameter_tvb, ASP_IDENTIFIER_OFFSET, ASP_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 759   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_IDENTIFIER_OFFSET));
 760 }
 761
 762 static void
 763 dissect_protocol_data_1_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 764 {
 765   guint16 protocol_data_length;
 766   tvbuff_t *payload_tvb;
 767
 768   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 769   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_OFFSET, protocol_data_length, protocol_data_length);
 770   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 771   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 772   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 773
 774 }
 775
 776 #define LI_OCTETT_LENGTH 1
 777 #define LI_OCTETT_OFFSET PARAMETER_VALUE_OFFSET
 778
 779 static void
 780 dissect_protocol_data_2_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
 781 {
 782   guint8 li;
 783   guint16 protocol_data_length;
 784   tvbuff_t *payload_tvb;
 785
 786   li                   = tvb_get_guint8(parameter_tvb, LI_OCTETT_OFFSET);
 787   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - LI_OCTETT_LENGTH;
 788   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_OFFSET + LI_OCTETT_LENGTH, protocol_data_length, protocol_data_length);
 789   proto_tree_add_item(parameter_tree, hf_li, parameter_tvb, LI_OCTETT_OFFSET, LI_OCTETT_LENGTH, NETWORK_BYTE_ORDER);
 790   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 791   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + LI_OCTETT_LENGTH);
 792   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 793 }
 794
 795
 796
 797 #define CON_DEST_RESERVED_LENGTH    1
 798 #define CON_DEST_PC_LENGTH          3
 799
 800 #define CON_DEST_RESERVED_OFFSET    PARAMETER_VALUE_OFFSET
 801 #define CON_DEST_PC_OFFSET          (CON_DEST_RESERVED_OFFSET + CON_DEST_RESERVED_LENGTH)
 802
 803 static void
 804 dissect_concerned_destination_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 805 {
 806   proto_tree_add_item(parameter_tree, hf_concerned_dest_reserved, parameter_tvb, CON_DEST_RESERVED_OFFSET, CON_DEST_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 807   proto_tree_add_item(parameter_tree, hf_concerned_dest_pc,       parameter_tvb, CON_DEST_PC_OFFSET,       CON_DEST_PC_LENGTH,       NETWORK_BYTE_ORDER);
 808   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, CON_DEST_PC_OFFSET));
 809 }
 810
 811 static void
 812 dissect_routing_key_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 813 {
 814   tvbuff_t *parameters_tvb;
 815   guint16 length, parameters_length;
 816
 817   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 818   parameters_length = length - PARAMETER_HEADER_LENGTH;
 819   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 820   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 821 }
 822
 823 static const value_string registration_result_status_values[] = {
 824   { 0,           "Successfully Registered" } ,
 825   { 1,           "Error - Unknown" } ,
 826   { 2,           "Error - Invalid DPC" } ,
 827   { 3,           "Error - Invalid Network Appearance" } ,
 828   { 4,           "Error - Invalid Routing Key" } ,
 829   { 5,           "Error - Permission Denied" } ,
 830   { 6,           "Error - Overlapping (Non-unique) Routing Key" } ,
 831   { 7,           "Error - Routing Key not Provisioned" } ,
 832   { 8,           "Error - Insufficient Resources" } ,
 833   { 0,           NULL } };
 834
 835 #define REG_RES_IDENTIFIER_LENGTH 4
 836 #define REG_RES_STATUS_LENGTH     4
 837 #define REG_RES_CONTEXT_LENGTH    4
 838
 839 #define REG_RES_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 840 #define REG_RES_STATUS_OFFSET     (REG_RES_IDENTIFIER_OFFSET + REG_RES_IDENTIFIER_LENGTH)
 841 #define REG_RES_CONTEXT_OFFSET    (REG_RES_STATUS_OFFSET + REG_RES_STATUS_LENGTH)
 842
 843 static void
 844 dissect_v6_registration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 845 {
 846   proto_tree_add_item(parameter_tree, hf_registration_result_identifier, parameter_tvb, REG_RES_IDENTIFIER_OFFSET, REG_RES_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 847   proto_tree_add_item(parameter_tree, hf_registration_result_status,     parameter_tvb, REG_RES_STATUS_OFFSET,     REG_RES_STATUS_LENGTH,     NETWORK_BYTE_ORDER);
 848   proto_tree_add_item(parameter_tree, hf_registration_result_context,    parameter_tvb, REG_RES_CONTEXT_OFFSET,    REG_RES_CONTEXT_LENGTH,    NETWORK_BYTE_ORDER);
 849 }
 850
 851 static void
 852 dissect_registration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 853 {
 854   tvbuff_t *parameters_tvb;
 855   guint16 length, parameters_length;
 856
 857   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 858   parameters_length = length - PARAMETER_HEADER_LENGTH;
 859   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 860   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 861 }
 862
 863 static const value_string v6_deregistration_result_status_values[] = {
 864   { 0, "Successfully De-registered" } ,
 865   { 1, "Error - Unknown" } ,
 866   { 2, "Error - Invalid Routing context" } ,
 867   { 3, "Error - Permission Denied" } ,
 868   { 4, "Error - Not registered" } ,
 869   { 0, NULL } };
 870
 871 #define DEREG_RES_CONTEXT_LENGTH 4
 872 #define DEREG_RES_STATUS_LENGTH  4
 873
 874 #define DEREG_RES_CONTEXT_OFFSET PARAMETER_VALUE_OFFSET
 875 #define DEREG_RES_STATUS_OFFSET  (DEREG_RES_CONTEXT_OFFSET + DEREG_RES_CONTEXT_LENGTH)
 876
 877 static void
 878 dissect_v6_deregistration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 879 {
 880   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_context, parameter_tvb, DEREG_RES_CONTEXT_OFFSET, DEREG_RES_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 881   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_status,  parameter_tvb, DEREG_RES_STATUS_OFFSET,  DEREG_RES_STATUS_LENGTH,  NETWORK_BYTE_ORDER);
 882 }
 883
 884 static void
 885 dissect_deregistration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 886 {
 887   tvbuff_t *parameters_tvb;
 888   guint16 length, parameters_length;
 889
 890   length            = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 891   parameters_length = length - PARAMETER_HEADER_LENGTH;
 892   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 893   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 894 }
 895
 896
 897 #define LOCAL_RK_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 898 #define LOCAL_RK_IDENTIFIER_LENGTH 4
 899
 900 static void
 901 dissect_local_routing_key_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 902 {
 903   guint32 id;
 904
 905   id = tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET);
 906   proto_tree_add_item(parameter_tree, hf_local_rk_identifier, parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET, LOCAL_RK_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 907   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET));
 908 }
 909
 910 #define DPC_MASK_LENGTH    1
 911 #define DPC_PC_LENGTH      3
 912
 913 #define DPC_MASK_OFFSET    PARAMETER_VALUE_OFFSET
 914 #define DPC_PC_OFFSET      (DPC_MASK_OFFSET + DPC_MASK_LENGTH)
 915
 916 static void
 917 dissect_destination_point_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 918 {
 919   proto_tree_add_item(parameter_tree, hf_dpc_mask, parameter_tvb, DPC_MASK_OFFSET, DPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 920   proto_tree_add_item(parameter_tree, hf_dpc_pc,   parameter_tvb, DPC_PC_OFFSET,   DPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 921   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, DPC_PC_OFFSET));
 922 }
 923
 924 #define SI_LENGTH 1
 925
 926 static void
 927 dissect_service_indicators_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 928 {
 929   guint16 length, number_of_sis, si_number;
 930   gint si_offset;
 931
 932   length        = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 933   number_of_sis = length - PARAMETER_HEADER_LENGTH;
 934
 935   si_offset = PARAMETER_VALUE_OFFSET;
 936   for(si_number=1; si_number <= number_of_sis; si_number++) {
 937     proto_tree_add_item(parameter_tree, hf_si, parameter_tvb, si_offset, SI_LENGTH, NETWORK_BYTE_ORDER);
 938     si_offset += SI_LENGTH;
 939   };
 940   proto_item_append_text(parameter_item, " (%u indicator%s)", number_of_sis, plurality(number_of_sis, "", "s"));
 941
 942 }
 943 #define SSN_LENGTH 1
 944
 945 static void
 946 dissect_subsystem_numbers_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 947 {
 948   guint16 length, number_of_ssns, ssn_number;
 949   gint ssn_offset;
 950
 951   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 952   number_of_ssns = length - PARAMETER_HEADER_LENGTH;
 953
 954   ssn_offset = PARAMETER_VALUE_OFFSET;
 955   for(ssn_number=1; ssn_number <= number_of_ssns; ssn_number++) {
 956     proto_tree_add_item(parameter_tree, hf_ssn, parameter_tvb, ssn_offset, SSN_LENGTH, NETWORK_BYTE_ORDER);
 957     ssn_offset += SSN_LENGTH;
 958   };
 959   proto_item_append_text(parameter_item, " (%u number%s)", number_of_ssns, plurality(number_of_ssns, "", "s"));
 960
 961 }
 962
 963 #define OPC_MASK_LENGTH             1
 964 #define OPC_PC_LENGTH               3
 965 #define OPC_LENGTH                  (OPC_MASK_LENGTH + OPC_PC_LENGTH)
 966 #define OPC_MASK_OFFSET             0
 967 #define OPC_PC_OFFSET               (OPC_MASK_OFFSET + OPC_MASK_LENGTH)
 968
 969 static void
 970 dissect_originating_point_code_list_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 971 {
 972   guint16 length, number_of_point_codes, point_code_number;
 973   gint point_code_offset;
 974
 975   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 976   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / 4;
 977
 978   point_code_offset = PARAMETER_VALUE_OFFSET;
 979   for(point_code_number=1; point_code_number <= number_of_point_codes; point_code_number++) {
 980     proto_tree_add_item(parameter_tree, hf_opc_list_mask, parameter_tvb, point_code_offset + OPC_MASK_OFFSET, OPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 981     proto_tree_add_item(parameter_tree, hf_opc_list_pc,   parameter_tvb, point_code_offset + OPC_PC_OFFSET,   OPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 982     point_code_offset += OPC_LENGTH;
 983   };
 984   proto_item_append_text(parameter_item, " (%u point code%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
 985 }
 986
 987 #define CIC_RANGE_MASK_LENGTH             1
 988 #define CIC_RANGE_PC_LENGTH               3
 989 #define CIC_RANGE_LOWER_LENGTH            2
 990 #define CIC_RANGE_UPPER_LENGTH            2
 991 #define CIC_RANGE_LENGTH                  (CIC_RANGE_MASK_LENGTH + CIC_RANGE_PC_LENGTH + CIC_RANGE_LOWER_LENGTH + CIC_RANGE_UPPER_LENGTH)
 992 #define CIC_RANGE_MASK_OFFSET             0
 993 #define CIC_RANGE_PC_OFFSET               (CIC_RANGE_MASK_OFFSET + CIC_RANGE_MASK_LENGTH)
 994 #define CIC_RANGE_LOWER_OFFSET            (CIC_RANGE_PC_OFFSET + CIC_RANGE_PC_LENGTH)
 995 #define CIC_RANGE_UPPER_OFFSET            (CIC_RANGE_LOWER_OFFSET + CIC_RANGE_LOWER_LENGTH)
 996
 997 static void
 998 dissect_circuit_range_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 999 {
1000   guint16 length, number_of_point_codes, point_code_number;
1001   gint point_code_offset;
1002
1003   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1004   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / CIC_RANGE_LENGTH;
1005
1006   point_code_offset = PARAMETER_VALUE_OFFSET;
1007   for(point_code_number = 1; point_code_number <= number_of_point_codes; point_code_number++) {
1008     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);
1009     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);
1010     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);
1011     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);
1012     point_code_offset += CIC_RANGE_LENGTH;
1013   };
1014   proto_item_append_text(parameter_item, " (%u range%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
1015 }
1016
1017 #define DATA_OPC_LENGTH   4
1018 #define DATA_DPC_LENGTH   4
1019 #define DATA_SI_LENGTH    1
1020 #define DATA_NI_LENGTH    1
1021 #define DATA_MP_LENGTH    1
1022 #define DATA_SLS_LENGTH   1
1023 #define DATA_HDR_LENGTH   (DATA_OPC_LENGTH + DATA_DPC_LENGTH + DATA_SI_LENGTH + DATA_NI_LENGTH + DATA_MP_LENGTH + DATA_SLS_LENGTH)
1024
1025 #define DATA_OPC_OFFSET   PARAMETER_VALUE_OFFSET
1026 #define DATA_DPC_OFFSET   (DATA_OPC_OFFSET + DATA_OPC_LENGTH)
1027 #define DATA_SI_OFFSET    (DATA_DPC_OFFSET + DATA_DPC_LENGTH)
1028 #define DATA_NI_OFFSET    (DATA_SI_OFFSET  + DATA_SI_LENGTH)
1029 #define DATA_MP_OFFSET    (DATA_NI_OFFSET  + DATA_NI_LENGTH)
1030 #define DATA_SLS_OFFSET   (DATA_MP_OFFSET  + DATA_MP_LENGTH)
1031 #define DATA_ULP_OFFSET   (DATA_SLS_OFFSET + DATA_SLS_LENGTH)
1032
1033 static void
1034 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
1035 {
1036   guint16 ulp_length;
1037   tvbuff_t *payload_tvb;
1038
1039   ulp_length  = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - DATA_HDR_LENGTH;
1040
1041   if (parameter_tree) {
1042     proto_tree_add_item(parameter_tree, hf_protocol_data_opc, parameter_tvb, DATA_OPC_OFFSET, DATA_OPC_LENGTH, NETWORK_BYTE_ORDER);
1043     proto_tree_add_item(parameter_tree, hf_protocol_data_dpc, parameter_tvb, DATA_DPC_OFFSET, DATA_DPC_LENGTH, NETWORK_BYTE_ORDER);
1044     proto_tree_add_item(parameter_tree, hf_protocol_data_si,  parameter_tvb, DATA_SI_OFFSET,  DATA_SI_LENGTH,  NETWORK_BYTE_ORDER);
1045     proto_tree_add_item(parameter_tree, hf_protocol_data_ni,  parameter_tvb, DATA_NI_OFFSET,  DATA_NI_LENGTH,  NETWORK_BYTE_ORDER);
1046     proto_tree_add_item(parameter_tree, hf_protocol_data_mp,  parameter_tvb, DATA_MP_OFFSET,  DATA_MP_LENGTH,  NETWORK_BYTE_ORDER);
1047     proto_tree_add_item(parameter_tree, hf_protocol_data_sls, parameter_tvb, DATA_SLS_OFFSET, DATA_SLS_LENGTH, NETWORK_BYTE_ORDER);
1048
1049     proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", ulp_length, plurality(ulp_length, "", "s"));
1050     proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + DATA_HDR_LENGTH);
1051   }
1052
1053   payload_tvb = tvb_new_subset(parameter_tvb, DATA_ULP_OFFSET, ulp_length, ulp_length);
1054   if (!dissector_try_port(si_dissector_table, tvb_get_guint8(parameter_tvb, DATA_SI_OFFSET), payload_tvb, pinfo, tree))
1055     call_dissector(data_handle, payload_tvb, pinfo, tree);
1056 }
1057
1058 #define CORR_ID_OFFSET PARAMETER_VALUE_OFFSET
1059 #define CORR_ID_LENGTH 4
1060
1061 static void
1062 dissect_correlation_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1063 {
1064   proto_tree_add_item(parameter_tree, hf_correlation_identifier, parameter_tvb, CORR_ID_OFFSET, CORR_ID_LENGTH, NETWORK_BYTE_ORDER);
1065   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, CORR_ID_OFFSET));
1066 }
1067
1068 #define REG_STATUS_LENGTH  4
1069 #define REG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1070
1071 static const value_string registration_status_values[] = {
1072   {  0,           "Successfully Registered" },
1073   {  1,           "Error - Unknown" },
1074   {  2,           "Error - Invalid DPC" },
1075   {  3,           "Error - Invalid Network Appearance" },
1076   {  4,           "Error - Invalid Routing Key" },
1077   {  5,           "Error - Permission Denied" },
1078   {  6,           "Error - Cannot Support Unique Routing" },
1079   {  7,           "Error - Routing Key not Currently Provisioned" },
1080   {  8,           "Error - Insufficient Resources" },
1081   {  9,           "Error - Unsupported RK parameter Field" },
1082   { 10,           "Error - Unsupported/Invalid Traffic Handling Mode" },
1083   {  0,           NULL } };
1084
1085 static void
1086 dissect_registration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1087 {
1088   proto_tree_add_item(parameter_tree, hf_registration_status, parameter_tvb, REG_STATUS_OFFSET, REG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1089   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REG_STATUS_OFFSET), registration_status_values, "unknown"));
1090 }
1091
1092 #define DEREG_STATUS_LENGTH  4
1093 #define DEREG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1094
1095 static const value_string deregistration_status_values[] = {
1096   { 0,          "Successfully Deregistered" },
1097   { 1,          "Error - Unknown" },
1098   { 2,          "Error - Invalid Routing Context" },
1099   { 3,          "Error - Permission Denied" },
1100   { 4,          "Error - Not Registered" },
1101   { 5,          "Error - ASP Currently Active for Routing Context" },
1102   { 0,          NULL } };
1103
1104 static void
1105 dissect_deregistration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1106 {
1107   proto_tree_add_item(parameter_tree, hf_deregistration_status, parameter_tvb, DEREG_STATUS_OFFSET, DEREG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1108   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, DEREG_STATUS_OFFSET), deregistration_status_values, "unknown"));
1109 }
1110
1111 static void
1112 dissect_registration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1113 {
1114   tvbuff_t *parameters_tvb;
1115   guint16 parameters_length;
1116
1117   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1118   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1119   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1120 }
1121
1122 static void
1123 dissect_deregistration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1124 {
1125   tvbuff_t *parameters_tvb;
1126   guint16 parameters_length;
1127
1128   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1129   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1130   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1131 }
1132
1133 static void
1134 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1135 {
1136   guint16 tag, parameter_value_length;
1137
1138   tag                    = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1139   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1140   proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, NETWORK_BYTE_ORDER);
1141   proto_item_append_text(parameter_item, " (tag %u and %u byte%s value)", tag, parameter_value_length, plurality(parameter_value_length, "", "s"));
1142 }
1143
1144 #define V5_NETWORK_APPEARANCE_PARAMETER_TAG       1
1145 #define V5_PROTOCOL_DATA_PARAMETER_TAG            3
1146 #define V5_INFO_PARAMETER_TAG                     4
1147 #define V5_AFFECTED_DESTINATIONS_PARAMETER_TAG    5
1148 #define V5_ROUTING_CONTEXT_PARAMETER_TAG          6
1149 #define V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG   7
1150 #define V5_HEARTBEAT_DATA_PARAMETER_TAG           8
1151 #define V5_USER_CAUSE_PARAMETER_TAG               9
1152 #define V5_REASON_PARAMETER_TAG                   10
1153 #define V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG        11
1154 #define V5_ERROR_CODE_PARAMETER_TAG               12
1155 #define V5_STATUS_PARAMETER_TAG                   13
1156 #define V5_CONGESTION_INDICATION_PARAMETER_TAG    14
1157
1158 static const value_string v5_parameter_tag_values[] = {
1159   { V5_NETWORK_APPEARANCE_PARAMETER_TAG,     "Network appearance" },
1160   { V5_PROTOCOL_DATA_PARAMETER_TAG,          "Protocol data" },
1161   { V5_INFO_PARAMETER_TAG,                   "Info" },
1162   { V5_AFFECTED_DESTINATIONS_PARAMETER_TAG,  "Affected destinations" },
1163   { V5_ROUTING_CONTEXT_PARAMETER_TAG,        "Routing context" },
1164   { V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
1165   { V5_HEARTBEAT_DATA_PARAMETER_TAG,         "Heartbeat data" },
1166   { V5_USER_CAUSE_PARAMETER_TAG,             "User / Cause" },
1167   { V5_REASON_PARAMETER_TAG,                 "Reason" },
1168   { V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG,      "Traffic mode type" },
1169   { V5_ERROR_CODE_PARAMETER_TAG,             "Error code" },
1170   { V5_STATUS_PARAMETER_TAG,                 "Status" },
1171   { V5_CONGESTION_INDICATION_PARAMETER_TAG,  "Congestion indication" },
1172   { 0,                                       NULL } };
1173
1174 static void
1175 dissect_v5_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1176 {
1177   guint16 tag, length, padding_length;
1178   proto_item *parameter_item;
1179   proto_tree *parameter_tree;
1180
1181   /* extract tag and length from the parameter */
1182   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1183   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1184   padding_length = tvb_length(parameter_tvb) - length;
1185
1186   if (!tree && tag != V5_PROTOCOL_DATA_PARAMETER_TAG)
1187     return;     /* Nothing to do here */
1188
1189   /* create proto_tree stuff */
1190   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"));
1191   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1192
1193   /* add tag and length to the parameter tree */
1194   proto_tree_add_item(parameter_tree, hf_v5_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1195   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1196
1197   switch(tag) {
1198   case V5_NETWORK_APPEARANCE_PARAMETER_TAG:
1199     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1200     break;
1201   case V5_PROTOCOL_DATA_PARAMETER_TAG:
1202     dissect_v5_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_item);
1203     break;
1204   case V5_INFO_PARAMETER_TAG:
1205     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1206     break;
1207   case V5_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1208     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1209     break;
1210   case V5_ROUTING_CONTEXT_PARAMETER_TAG:
1211     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1212     break;
1213   case V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1214     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1215     break;
1216   case V5_HEARTBEAT_DATA_PARAMETER_TAG:
1217     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1218     break;
1219   case V5_USER_CAUSE_PARAMETER_TAG:
1220     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1221     break;
1222   case V5_REASON_PARAMETER_TAG:
1223     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1224     break;
1225   case V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1226     dissect_v5_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1227     break;
1228   case V5_ERROR_CODE_PARAMETER_TAG:
1229     dissect_v5_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1230     break;
1231   case V5_STATUS_PARAMETER_TAG:
1232     dissect_v56_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1233     break;
1234   case V5_CONGESTION_INDICATION_PARAMETER_TAG:
1235     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1236     break;
1237   default:
1238     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1239     break;
1240   };
1241   if (padding_length > 0)
1242     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1243 }
1244
1245 #define V6_NETWORK_APPEARANCE_PARAMETER_TAG            1
1246 #define V6_PROTOCOL_DATA_1_PARAMETER_TAG               2
1247 #define V6_PROTOCOL_DATA_2_PARAMETER_TAG               3
1248 #define V6_INFO_PARAMETER_TAG                          4
1249 #define V6_AFFECTED_DESTINATIONS_PARAMETER_TAG         5
1250 #define V6_ROUTING_CONTEXT_PARAMETER_TAG               6
1251 #define V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG        7
1252 #define V6_HEARTBEAT_DATA_PARAMETER_TAG                8
1253 #define V6_USER_CAUSE_PARAMETER_TAG                    9
1254 #define V6_REASON_PARAMETER_TAG                       10
1255 #define V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG            11
1256 #define V6_ERROR_CODE_PARAMETER_TAG                   12
1257 #define V6_STATUS_PARAMETER_TAG                       13
1258 #define V6_CONGESTION_INDICATION_PARAMETER_TAG        14
1259 #define V6_CONCERNED_DESTINATION_PARAMETER_TAG        15
1260 #define V6_ROUTING_KEY_PARAMETER_TAG                  16
1261 #define V6_REGISTRATION_RESULT_PARAMETER_TAG          17
1262 #define V6_DEREGISTRATION_RESULT_PARAMETER_TAG        18
1263 #define V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 19
1264 #define V6_DESTINATION_POINT_CODE_PARAMETER_TAG       20
1265 #define V6_SERVICE_INDICATORS_PARAMETER_TAG           21
1266 #define V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG            22
1267 #define V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  23
1268 #define V6_CIRCUIT_RANGE_PARAMETER_TAG                24
1269 #define V6_REGISTRATION_RESULTS_PARAMETER_TAG         25
1270 #define V6_DEREGISTRATION_RESULTS_PARAMETER_TAG       26
1271
1272 static const value_string v6_parameter_tag_values[] = {
1273   { V6_NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" },
1274   { V6_PROTOCOL_DATA_1_PARAMETER_TAG,              "Protocol data 1" },
1275   { V6_PROTOCOL_DATA_2_PARAMETER_TAG,              "Protocol data 2" },
1276   { V6_INFO_PARAMETER_TAG,                         "Info" },
1277   { V6_AFFECTED_DESTINATIONS_PARAMETER_TAG,        "Affected destinations" },
1278   { V6_ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" },
1279   { V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic information" },
1280   { V6_HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" },
1281   { V6_USER_CAUSE_PARAMETER_TAG,                   "User / Cause" },
1282   { V6_REASON_PARAMETER_TAG,                       "Reason" },
1283   { V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" },
1284   { V6_ERROR_CODE_PARAMETER_TAG,                   "Error code" },
1285   { V6_STATUS_PARAMETER_TAG,                       "Status" },
1286   { V6_CONGESTION_INDICATION_PARAMETER_TAG,        "Congestion indication" },
1287   { V6_CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" },
1288   { V6_ROUTING_KEY_PARAMETER_TAG,                  "Routing Key" },
1289   { V6_REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" },
1290   { V6_DEREGISTRATION_RESULT_PARAMETER_TAG,        "De-registration result" },
1291   { V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" },
1292   { V6_DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" },
1293   { V6_SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" },
1294   { V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG,            "Subsystem numbers" },
1295   { V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" },
1296   { V6_CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" },
1297   { V6_REGISTRATION_RESULTS_PARAMETER_TAG,         "Registration results" },
1298   { V6_DEREGISTRATION_RESULTS_PARAMETER_TAG,       "De-registration results" },
1299   { 0,                           NULL } };
1300
1301 static void
1302 dissect_v6_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1303 {
1304   guint16 tag, length, padding_length;
1305   proto_item *parameter_item;
1306   proto_tree *parameter_tree;
1307
1308   /* extract tag and length from the parameter */
1309   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1310   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1311   padding_length = tvb_length(parameter_tvb) - length;
1312
1313   if (!tree && tag != V6_PROTOCOL_DATA_1_PARAMETER_TAG && tag != V6_PROTOCOL_DATA_2_PARAMETER_TAG)
1314     return;     /* Nothing to do here */
1315
1316   /* create proto_tree stuff */
1317   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"));
1318   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1319
1320   /* add tag and length to the parameter tree */
1321   proto_tree_add_item(parameter_tree, hf_v6_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1322   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1323
1324   switch(tag) {
1325   case V6_NETWORK_APPEARANCE_PARAMETER_TAG:
1326     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1327     break;
1328   case V6_PROTOCOL_DATA_1_PARAMETER_TAG:
1329     dissect_protocol_data_1_parameter(parameter_tvb, pinfo, tree, parameter_item);
1330     break;
1331   case V6_PROTOCOL_DATA_2_PARAMETER_TAG:
1332     dissect_protocol_data_2_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1333     break;
1334   case V6_INFO_PARAMETER_TAG:
1335     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1336     break;
1337   case V6_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1338     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1339     break;
1340   case V6_ROUTING_CONTEXT_PARAMETER_TAG:
1341     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1342     break;
1343   case V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1344     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1345     break;
1346   case V6_HEARTBEAT_DATA_PARAMETER_TAG:
1347     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1348     break;
1349   case V6_USER_CAUSE_PARAMETER_TAG:
1350     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1351     break;
1352   case V6_REASON_PARAMETER_TAG:
1353     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1354     break;
1355   case V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1356     dissect_v6_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1357     break;
1358   case V6_ERROR_CODE_PARAMETER_TAG:
1359     dissect_v6_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1360     break;
1361   case V6_STATUS_PARAMETER_TAG:
1362     dissect_v56_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1363     break;
1364   case V6_CONGESTION_INDICATION_PARAMETER_TAG:
1365     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1366     break;
1367   case V6_CONCERNED_DESTINATION_PARAMETER_TAG:
1368     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1369     break;
1370   case V6_ROUTING_KEY_PARAMETER_TAG:
1371     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1372     break;
1373   case V6_REGISTRATION_RESULT_PARAMETER_TAG:
1374     dissect_v6_registration_result_parameter(parameter_tvb, parameter_tree);
1375     break;
1376   case V6_DEREGISTRATION_RESULT_PARAMETER_TAG:
1377     dissect_v6_deregistration_result_parameter(parameter_tvb, parameter_tree);
1378     break;
1379   case V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1380     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1381     break;
1382   case V6_DESTINATION_POINT_CODE_PARAMETER_TAG:
1383     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1384     break;
1385   case V6_SERVICE_INDICATORS_PARAMETER_TAG:
1386     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1387     break;
1388   case V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG:
1389     dissect_subsystem_numbers_parameter(parameter_tvb, parameter_tree, parameter_item);
1390     break;
1391   case V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1392     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1393     break;
1394   case V6_CIRCUIT_RANGE_PARAMETER_TAG:
1395     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1396     break;
1397   case V6_REGISTRATION_RESULTS_PARAMETER_TAG:
1398     dissect_registration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1399     break;
1400   case V6_DEREGISTRATION_RESULTS_PARAMETER_TAG:
1401     dissect_deregistration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1402     break;
1403   default:
1404     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1405     break;
1406   };
1407
1408   if (padding_length > 0)
1409     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1410 }
1411
1412 #define INFO_STRING_PARAMETER_TAG                  0x0004
1413 #define ROUTING_CONTEXT_PARAMETER_TAG              0x0006
1414 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG       0x0007
1415 #define HEARTBEAT_DATA_PARAMETER_TAG               0x0009
1416 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG            0x000b
1417 #define ERROR_CODE_PARAMETER_TAG                   0x000c
1418 #define STATUS_PARAMETER_TAG                       0x000d
1419 #define ASP_IDENTIFIER_PARAMETER_TAG               0x0011
1420 #define AFFECTED_POINT_CODE_PARAMETER_TAG          0x0012
1421 #define CORRELATION_IDENTIFIER_PARAMETER_TAG       0x0013
1422
1423 #define NETWORK_APPEARANCE_PARAMETER_TAG           0x0200
1424 #define USER_CAUSE_PARAMETER_TAG                   0x0204
1425 #define CONGESTION_INDICATIONS_PARAMETER_TAG       0x0205
1426 #define CONCERNED_DESTINATION_PARAMETER_TAG        0x0206
1427 #define ROUTING_KEY_PARAMETER_TAG                  0x0207
1428 #define REGISTRATION_RESULT_PARAMETER_TAG          0x0208
1429 #define DEREGISTRATION_RESULT_PARAMETER_TAG        0x0209
1430 #define LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 0x020a
1431 #define DESTINATION_POINT_CODE_PARAMETER_TAG       0x020b
1432 #define SERVICE_INDICATORS_PARAMETER_TAG           0x020c
1433 #define ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  0x020e
1434 #define CIRCUIT_RANGE_PARAMETER_TAG                0x020f
1435 #define PROTOCOL_DATA_PARAMETER_TAG                0x0210
1436 #define REGISTRATION_STATUS_PARAMETER_TAG          0x0212
1437 #define DEREGISTRATION_STATUS_PARAMETER_TAG        0x0213
1438
1439 static const value_string parameter_tag_values[] = {
1440   { INFO_STRING_PARAMETER_TAG,                  "Info string" } ,
1441   { ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" } ,
1442   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic Information" } ,
1443   { HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" } ,
1444   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" } ,
1445   { ERROR_CODE_PARAMETER_TAG,                   "Error code" } ,
1446   { STATUS_PARAMETER_TAG,                       "Status" } ,
1447   { ASP_IDENTIFIER_PARAMETER_TAG,               "ASP identifier" } ,
1448   { AFFECTED_POINT_CODE_PARAMETER_TAG,          "Affected point code" } ,
1449   { CORRELATION_IDENTIFIER_PARAMETER_TAG,       "Correlation identifier" } ,
1450   { NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" } ,
1451   { USER_CAUSE_PARAMETER_TAG,                   "User / cause" } ,
1452   { CONGESTION_INDICATIONS_PARAMETER_TAG,       "Congestion indications" } ,
1453   { CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" } ,
1454   { ROUTING_KEY_PARAMETER_TAG,                  "Routing key" } ,
1455   { REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" } ,
1456   { DEREGISTRATION_RESULT_PARAMETER_TAG,        "Deregistration result" } ,
1457   { LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" } ,
1458   { DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" } ,
1459   { SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" } ,
1460   { ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" } ,
1461   { CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" } ,
1462   { PROTOCOL_DATA_PARAMETER_TAG,                "Protocol data" } ,
1463   { REGISTRATION_STATUS_PARAMETER_TAG,          "Registration status" } ,
1464   { DEREGISTRATION_STATUS_PARAMETER_TAG,        "Deregistration status" } ,
1465   { 0,                           NULL } };
1466
1467 static void
1468 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1469 {
1470   guint16 tag, length, padding_length;
1471   proto_item *parameter_item;
1472   proto_tree *parameter_tree;
1473
1474   /* extract tag and length from the parameter */
1475   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1476   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1477   padding_length = tvb_length(parameter_tvb) - length;
1478
1479
1480   if (!tree && tag != PROTOCOL_DATA_PARAMETER_TAG)
1481     return;     /* Nothing to do here */
1482
1483   /* create proto_tree stuff */
1484   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"));
1485   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1486
1487   /* add tag and length to the parameter tree */
1488   proto_tree_add_item(parameter_tree, hf_parameter_tag,    parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1489   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1490
1491   switch(tag) {
1492   case INFO_STRING_PARAMETER_TAG:
1493     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1494     break;
1495   case ROUTING_CONTEXT_PARAMETER_TAG:
1496     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1497     break;
1498   case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1499     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1500     break;
1501   case HEARTBEAT_DATA_PARAMETER_TAG:
1502     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1503     break;
1504   case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1505     dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1506     break;
1507   case ERROR_CODE_PARAMETER_TAG:
1508     dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1509     break;
1510   case STATUS_PARAMETER_TAG:
1511     dissect_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1512     break;
1513   case ASP_IDENTIFIER_PARAMETER_TAG:
1514     dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1515     break;
1516   case AFFECTED_POINT_CODE_PARAMETER_TAG:
1517     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1518     break;
1519   case NETWORK_APPEARANCE_PARAMETER_TAG:
1520     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1521     break;
1522   case USER_CAUSE_PARAMETER_TAG:
1523     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1524     break;
1525   case CONGESTION_INDICATIONS_PARAMETER_TAG:
1526     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1527     break;
1528   case CONCERNED_DESTINATION_PARAMETER_TAG:
1529     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1530     break;
1531   case ROUTING_KEY_PARAMETER_TAG:
1532     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1533     break;
1534   case REGISTRATION_RESULT_PARAMETER_TAG:
1535     dissect_registration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1536     break;
1537   case DEREGISTRATION_RESULT_PARAMETER_TAG:
1538     dissect_deregistration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1539     break;
1540   case LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1541     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1542     break;
1543   case DESTINATION_POINT_CODE_PARAMETER_TAG:
1544     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1545     break;
1546   case SERVICE_INDICATORS_PARAMETER_TAG:
1547     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1548     break;
1549   case ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1550     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1551     break;
1552   case CIRCUIT_RANGE_PARAMETER_TAG:
1553     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1554     break;
1555   case PROTOCOL_DATA_PARAMETER_TAG:
1556     dissect_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1557     break;
1558   case CORRELATION_IDENTIFIER_PARAMETER_TAG:
1559     dissect_correlation_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1560     break;
1561   case REGISTRATION_STATUS_PARAMETER_TAG:
1562     dissect_registration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1563     break;
1564   case DEREGISTRATION_STATUS_PARAMETER_TAG:
1565     dissect_deregistration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1566     break;
1567   default:
1568     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1569     break;
1570   };
1571
1572   if (padding_length > 0)
1573     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1574 }
1575
1576 static void
1577 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1578 {
1579   gint offset, length, total_length, remaining_length;
1580   tvbuff_t *parameter_tvb;
1581
1582   offset = 0;
1583   while((remaining_length = tvb_length_remaining(parameters_tvb, offset))) {
1584     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
1585     total_length = ADD_PADDING(length);
1586     if (remaining_length >= length)
1587       total_length = MIN(total_length, remaining_length);
1588     /* create a tvb for the parameter including the padding bytes */
1589     parameter_tvb    = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
1590     switch(version) {
1591       case M3UA_V5:
1592         dissect_v5_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1593         break;
1594       case M3UA_V6:
1595         dissect_v6_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1596         break;
1597       case M3UA_RFC:
1598         dissect_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1599         break;
1600     }
1601     /* get rid of the handled parameter */
1602     offset += total_length;
1603   }
1604 }
1605
1606
1607 static void
1608 dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1609 {
1610   tvbuff_t *common_header_tvb, *parameters_tvb;
1611
1612   common_header_tvb = tvb_new_subset(message_tvb, 0, COMMON_HEADER_LENGTH, COMMON_HEADER_LENGTH);
1613   parameters_tvb    = tvb_new_subset(message_tvb, COMMON_HEADER_LENGTH, -1, -1);
1614   if (version == M3UA_V5)
1615         dissect_v5_common_header(common_header_tvb, pinfo, m3ua_tree);
1616   else
1617     dissect_common_header(common_header_tvb, pinfo, m3ua_tree);
1618
1619   /*  Need to dissect (certain) parameters even when !tree, so subdissectors
1620    *  (e.g., MTP3) are always called.
1621    */
1622   dissect_parameters(parameters_tvb, pinfo, tree, m3ua_tree);
1623 }
1624
1625 static void
1626 dissect_m3ua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
1627 {
1628   proto_item *m3ua_item;
1629   proto_tree *m3ua_tree;
1630
1631   /* make entry in the Protocol column on summary display */
1632   if (check_col(pinfo->cinfo, COL_PROTOCOL))
1633     col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA");
1634
1635   /* In the interest of speed, if "tree" is NULL, don't do any work not
1636      necessary to generate protocol tree items. */
1637   if (tree) {
1638     /* create the m3ua protocol tree */
1639     m3ua_item = proto_tree_add_item(tree, proto_m3ua, message_tvb, 0, -1, FALSE);
1640     m3ua_tree = proto_item_add_subtree(m3ua_item, ett_m3ua);
1641   } else {
1642     m3ua_tree = NULL;
1643   };
1644   /* dissect the message */
1645   dissect_message(message_tvb, pinfo, tree, m3ua_tree);
1646 }
1647
1648 /* Register the protocol with Ethereal */
1649 void
1650 proto_register_m3ua(void)
1651 {
1652
1653   /* Setup list of header fields */
1654   static hf_register_info hf[] = {
1655     { &hf_version,                          { "Version",                      "m3ua.version",                               FT_UINT8,  BASE_DEC,  VALS(protocol_version_values),                0x0, "", HFILL } },
1656     { &hf_reserved,                         { "Reserved",                     "m3ua.reserved",                              FT_UINT8,  BASE_HEX,  NULL,                                         0x0, "", HFILL } },
1657     { &hf_v5_message_class,                 { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(v5_message_class_values),                0x0, "", HFILL } },
1658     { &hf_message_class,                    { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(message_class_values),                   0x0, "", HFILL } },
1659     { &hf_message_type,                     { "Message Type",                 "m3ua.message_type",                          FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1660     { &hf_message_length,                   { "Message length",               "m3ua.message_length",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1661     { &hf_v5_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v5_parameter_tag_values),                0x0, "", HFILL } },
1662     { &hf_v6_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v6_parameter_tag_values),                0x0, "", HFILL } },
1663     { &hf_parameter_tag,                    { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(parameter_tag_values),                   0x0, "", HFILL } },
1664     { &hf_parameter_length,                 { "Parameter length",             "m3ua.parameter_length",                      FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1665     { &hf_parameter_value,                  { "Parameter value",              "m3ua.parameter_value",                       FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1666     { &hf_parameter_padding,                { "Padding",                      "m3ua.parameter_padding",                     FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1667     { &hf_parameter_trailer,                { "Trailer",                      "m3ua.paramter_trailer",                      FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1668     { &hf_network_appearance,               { "Network appearance",           "m3ua.network_appearance",                    FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1669     { &hf_info_string,                      { "Info string",                  "m3ua.info_string",                           FT_STRING, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1670     { &hf_routing_context,                  { "Routing context",              "m3ua.routing_context",                       FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1671     { &hf_diagnostic_information,           { "Diagnostic information",       "m3ua.diagnostic_information",                FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1672     { &hf_heartbeat_data,                   { "Heartbeat data",               "m3ua.heartbeat_data",                        FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1673     { &hf_v5_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v5_error_code_values),                   0x0, "", HFILL } },
1674     { &hf_v6_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v6_error_code_values),                   0x0, "", HFILL } },
1675     { &hf_error_code,                       { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(error_code_values),                      0x0, "", HFILL } },
1676     { &hf_status_type,                      { "Status type",                  "m3ua.status_type",                           FT_UINT16, BASE_DEC,  VALS(status_type_values),                     0x0, "", HFILL } },
1677     { &hf_status_info,                      { "Status info",                  "m3ua.status_info",                           FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1678     { &hf_asp_identifier,                   { "ASP identifier",               "m3ua.asp_identifier",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1679     { &hf_affected_point_code_mask,         { "Mask",                         "m3ua.affected_point_code_mask",              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1680     { &hf_affected_point_code_pc,           { "Affected point code",          "m3ua.affected_point_code_pc",                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1681     { &hf_cause,                            { "Unavailability cause",         "m3ua.unavailability_cause",                  FT_UINT16, BASE_DEC,  VALS(unavailability_cause_values),            0x0, "", HFILL } },
1682     { &hf_user,                             { "User Identity",                "m3ua.user_identity",                         FT_UINT16, BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1683     { &hf_reason,                           { "Reason",                       "m3ua.reason",                                FT_UINT32, BASE_DEC,  VALS(reason_values),                          0x0, "", HFILL } },
1684     { &hf_v5_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v5_traffic_mode_type_values),            0x0, "", HFILL } },
1685     { &hf_v6_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v6_traffic_mode_type_values),            0x0, "", HFILL } },
1686     { &hf_traffic_mode_type,                { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(traffic_mode_type_values),               0x0, "", HFILL } },
1687     { &hf_congestion_reserved,              { "Reserved",                     "m3ua.congestion_reserved",                   FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1688     { &hf_congestion_level,                 { "Congestion level",             "m3ua.congestion_level",                      FT_UINT8,  BASE_DEC,  VALS(congestion_level_values),                0x0, "", HFILL } },
1689     { &hf_concerned_dest_reserved,          { "Reserved",                     "m3ua.concerned_reserved",                    FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1690     { &hf_concerned_dest_pc,                { "Concerned DPC",                "m3ua.concerned_dpc",                         FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1691     { &hf_local_rk_identifier,              { "Local routing key identifier", "m3ua.local_rk_identifier",                   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1692     { &hf_dpc_mask,                         { "Mask",                         "m3ua.dpc_mask",                              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1693     { &hf_dpc_pc,                           { "Destination point code",       "m3ua.dpc_pc",                                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1694     { &hf_si,                               { "Service indicator",            "m3ua.si",                                    FT_UINT8,  BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1695     { &hf_ssn,                              { "Subsystem number",             "m3ua.ssn",                                   FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1696     { &hf_opc_list_mask,                    { "Mask",                         "m3ua.opc_list_mask",                         FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1697     { &hf_opc_list_pc,                      { "Originating point code",       "m3ua.opc_list_pc",                           FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1698     { &hf_cic_range_mask,                   { "Mask",                         "m3ua.cic_range_mask",                        FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1699     { &hf_cic_range_pc,                     { "Originating point code",       "m3ua.cic_range_pc",                          FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1700     { &hf_cic_range_lower,                  { "Lower CIC value",              "m3ua.cic_range_lower",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1701     { &hf_cic_range_upper,                  { "Upper CIC value",              "m3ua.cic_range_upper",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1702     { &hf_li,                               { "Length indicator",             "m3ua.protocol_data_2_li",                    FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1703     { &hf_protocol_data_opc,                { "OPC",                          "m3ua.protocol_data_opc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1704     { &hf_protocol_data_dpc,                { "DPC",                          "m3ua.protocol_data_dpc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1705     { &hf_protocol_data_si,                 { "SI",                           "m3ua.protocol_data_si",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1706     { &hf_protocol_data_ni,                 { "NI",                           "m3ua.protocol_data_ni",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1707     { &hf_protocol_data_mp,                 { "MP",                           "m3ua.protocol_data_mp",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1708     { &hf_protocol_data_sls,                { "SLS",                          "m3ua.protocol_data_sls",                     FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1709     { &hf_correlation_identifier,           { "Correlation Identifier",       "m3ua.correlation_identifier",                FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1710     { &hf_registration_status,              { "Registration status",          "m3ua.registration_status",                   FT_UINT32, BASE_DEC,  VALS(registration_status_values),             0x0, "", HFILL } },
1711     { &hf_deregistration_status,            { "Deregistration status",        "m3ua.deregistration_status",                 FT_UINT32, BASE_DEC,  VALS(deregistration_status_values),           0x0, "", HFILL } },
1712     { &hf_traffic_mode_type,                { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1713     { &hf_registration_result_identifier,   { "Local RK-identifier value",    "m3ua.registration_result_identifier",        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1714     { &hf_registration_result_status,       { "Registration status",          "m3ua.registration_results_status",           FT_UINT32, BASE_DEC,  VALS(registration_result_status_values),      0x0, "", HFILL } },
1715     { &hf_registration_result_context,      { "Routing context",              "m3ua.registration_result_routing_context",   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1716     { &hf_v6_deregistration_result_status,  { "De-Registration status",       "m3ua.deregistration_results_status",         FT_UINT32, BASE_DEC,  VALS(v6_deregistration_result_status_values), 0x0, "", HFILL } },
1717     { &hf_v6_deregistration_result_context, { "Routing context",              "m3ua.deregistration_result_routing_context", FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1718   };
1719
1720   /* Setup protocol subtree array */
1721   static gint *ett[] = {
1722     &ett_m3ua,
1723     &ett_parameter,
1724   };
1725
1726   static enum_val_t options[] = {
1727     { "Internet Draft version 5",        M3UA_V5  },
1728     { "Internet Draft version 6",        M3UA_V6  },
1729     { "RFC 3332",                        M3UA_RFC },
1730     { NULL, 0 }
1731   };
1732
1733   /* Register the protocol name and description */
1734   proto_m3ua = proto_register_protocol("MTP 3 User Adaptation Layer", "M3UA",  "m3ua");
1735   m3ua_module = prefs_register_protocol(proto_m3ua, NULL);
1736   prefs_register_enum_preference(m3ua_module, "version", "M3UA Version", "Version used by Ethereal", (gint *)&version, options, FALSE);
1737
1738   /* Required function calls to register the header fields and subtrees used */
1739   proto_register_field_array(proto_m3ua, hf, array_length(hf));
1740   proto_register_subtree_array(ett, array_length(ett));
1741   si_dissector_table = register_dissector_table("m3ua.protocol_data_si", "MTP3 Service indicator", FT_UINT8, BASE_HEX);
1742
1743 };
1744
1745 void
1746 proto_reg_handoff_m3ua(void)
1747 {
1748   dissector_handle_t m3ua_handle;
1749
1750   /*
1751    * Get a handle for the MTP3 dissector.
1752    */
1753   mtp3_handle = find_dissector("mtp3");
1754   data_handle = find_dissector("data");
1755   m3ua_handle = create_dissector_handle(dissect_m3ua, proto_m3ua);
1756   dissector_add("sctp.ppi",  M3UA_PAYLOAD_PROTOCOL_ID, m3ua_handle);
1757   dissector_add("sctp.port", SCTP_PORT_M3UA, m3ua_handle);
1758 }