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 <tuexen [AT] fh-muenster.de>
   9  *
  10  * $Id: packet-m3ua.c,v 1.30 2003/04/19 20:09:00 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,          "DATA1" },
 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 /* Initialize the protocol and registered fields */
 229 static int proto_m3ua = -1;
 230 static int hf_version = -1;
 231 static int hf_reserved = -1;
 232 static int hf_message_class = -1;
 233 static int hf_v5_message_class = -1;
 234 static int hf_message_type = -1;
 235 static int hf_message_length = -1;
 236 static int hf_v5_parameter_tag = -1;
 237 static int hf_v6_parameter_tag = -1;
 238 static int hf_parameter_tag = -1;
 239 static int hf_parameter_length = -1;
 240 static int hf_parameter_value = -1;
 241 static int hf_parameter_padding = -1;
 242 static int hf_parameter_trailer = -1;
 243 static int hf_network_appearance = -1;
 244 static int hf_info_string = -1;
 245 static int hf_routing_context = -1;
 246 static int hf_diagnostic_information = -1;
 247 static int hf_heartbeat_data = -1;
 248 static int hf_v5_error_code = -1;
 249 static int hf_v6_error_code = -1;
 250 static int hf_error_code = -1;
 251 static int hf_status_type = -1;
 252 static int hf_status_info = -1;
 253 static int hf_asp_identifier = -1;
 254 static int hf_affected_point_code_mask = -1;
 255 static int hf_affected_point_code_pc = -1;
 256 static int hf_cause = -1;
 257 static int hf_user = -1;
 258 static int hf_reason = -1;
 259 static int hf_v5_traffic_mode_type = -1;
 260 static int hf_v6_traffic_mode_type = -1;
 261 static int hf_traffic_mode_type = -1;
 262 static int hf_congestion_reserved = -1;
 263 static int hf_congestion_level = -1;
 264 static int hf_concerned_dest_reserved = -1;
 265 static int hf_concerned_dest_pc = -1;
 266 static int hf_local_rk_identifier = -1;
 267 static int hf_dpc_mask = -1;
 268 static int hf_dpc_pc = -1;
 269 static int hf_si = -1;
 270 static int hf_ssn = -1;
 271 static int hf_opc_list_mask = -1;
 272 static int hf_opc_list_pc = -1;
 273 static int hf_cic_range_mask = -1;
 274 static int hf_cic_range_pc = -1;
 275 static int hf_cic_range_upper = -1;
 276 static int hf_cic_range_lower = -1;
 277 static int hf_protocol_data_opc = -1;
 278 static int hf_protocol_data_dpc = -1;
 279 static int hf_protocol_data_si = -1;
 280 static int hf_protocol_data_ni = -1;
 281 static int hf_protocol_data_mp = -1;
 282 static int hf_protocol_data_sls = -1;
 283 static int hf_correlation_identifier = -1;
 284 static int hf_registration_status = -1;
 285 static int hf_deregistration_status = -1;
 286 static int hf_registration_result_identifier = -1;
 287 static int hf_registration_result_status = -1;
 288 static int hf_registration_result_context = -1;
 289 static int hf_v6_deregistration_result_status = -1;
 290 static int hf_v6_deregistration_result_context = -1;
 291 static int hf_li = -1;
 292
 293 /* Initialize the subtree pointers */
 294 static gint ett_m3ua = -1;
 295 static gint ett_parameter = -1;
 296
 297 static module_t *m3ua_module;
 298 static dissector_handle_t mtp3_handle, data_handle;
 299 static dissector_table_t si_dissector_table;
 300
 301 /* stuff for supporting multiple versions */
 302 typedef enum {
 303   M3UA_V5,
 304   M3UA_V6,
 305   M3UA_RFC
 306 } Version_Type;
 307
 308 static Version_Type version = M3UA_RFC;
 309
 310 static void
 311 dissect_parameters(tvbuff_t *, packet_info *, proto_tree *, proto_tree *);
 312
 313 static void
 314 dissect_v5_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 315 {
 316   guint8  message_class, message_type;
 317
 318   /* Extract the common header */
 319   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 320   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 321
 322   if (check_col(pinfo->cinfo, COL_INFO)) {
 323     col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(message_class * 256 + message_type, v5_message_class_type_acro_values, "reserved"));
 324     if (!(message_class == MESSAGE_CLASS_TFER_MESSAGE && message_type == MESSAGE_TYPE_DATA)){
 325       col_set_fence(pinfo->cinfo, COL_INFO);
 326     }
 327   }
 328
 329   if (m3ua_tree) {
 330     /* add the components of the common header to the protocol tree */
 331     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 332     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 333     proto_tree_add_item(m3ua_tree, hf_v5_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 334     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 335                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, v5_message_class_type_values, "reserved"), message_type);
 336     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 337   }
 338 }
 339
 340 static void
 341 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 342 {
 343   guint8  message_class, message_type;
 344
 345   /* Extract the common header */
 346   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 347   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 348
 349   if (check_col(pinfo->cinfo, COL_INFO)) {
 350     col_add_fstr(pinfo->cinfo, COL_INFO,"%s ", val_to_str(message_class * 256 + message_type, message_class_type_acro_values, "reserved"));
 351     if (!(message_class == MESSAGE_CLASS_TFER_MESSAGE && message_type == MESSAGE_TYPE_DATA))
 352       col_set_fence(pinfo->cinfo, COL_INFO);
 353   }
 354
 355   if (m3ua_tree) {
 356     /* add the components of the common header to the protocol tree */
 357     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 358     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 359     proto_tree_add_item(m3ua_tree, hf_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 360     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 361                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, message_class_type_values, "reserved"), message_type);
 362     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 363   }
 364 }
 365
 366 #define NETWORK_APPEARANCE_LENGTH 4
 367 #define NETWORK_APPEARANCE_OFFSET PARAMETER_VALUE_OFFSET
 368
 369 static void
 370 dissect_network_appearance_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 371 {
 372   proto_tree_add_item(parameter_tree, hf_network_appearance, parameter_tvb, NETWORK_APPEARANCE_OFFSET, NETWORK_APPEARANCE_LENGTH, NETWORK_BYTE_ORDER);
 373   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, NETWORK_APPEARANCE_OFFSET));
 374 }
 375
 376 #define V5_PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
 377
 378 static void
 379 dissect_v5_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 380 {
 381   guint16 length, protocol_data_length;
 382   tvbuff_t *payload_tvb;
 383
 384   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 385   protocol_data_length = length - PARAMETER_HEADER_LENGTH;
 386   payload_tvb          = tvb_new_subset(parameter_tvb, V5_PROTOCOL_DATA_OFFSET, protocol_data_length, protocol_data_length);
 387   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 388   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 389   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 390 }
 391
 392 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
 393
 394 static void
 395 dissect_info_string_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 396 {
 397   guint16 info_string_length;
 398
 399   info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 400   proto_tree_add_item(parameter_tree, hf_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, NETWORK_BYTE_ORDER);
 401   proto_item_append_text(parameter_item, " (%.*s)", info_string_length,
 402                          (const char *)tvb_get_ptr(parameter_tvb, INFO_STRING_OFFSET, info_string_length));
 403 }
 404
 405 #define AFFECTED_MASK_LENGTH 1
 406 #define AFFECTED_DPC_LENGTH  3
 407 #define AFFECTED_DESTINATION_LENGTH (AFFECTED_MASK_LENGTH + AFFECTED_DPC_LENGTH)
 408
 409 #define AFFECTED_MASK_OFFSET 0
 410 #define AFFECTED_DPC_OFFSET  1
 411
 412 static void
 413 dissect_affected_destinations_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 414 {
 415   guint16 number_of_destinations, destination_number;
 416   gint destination_offset;
 417
 418   number_of_destinations = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 419   destination_offset = PARAMETER_VALUE_OFFSET;
 420   for(destination_number=1; destination_number <= number_of_destinations; destination_number++) {
 421     proto_tree_add_item(parameter_tree, hf_affected_point_code_mask, parameter_tvb, destination_offset + AFFECTED_MASK_OFFSET, AFFECTED_MASK_LENGTH, NETWORK_BYTE_ORDER);
 422     proto_tree_add_item(parameter_tree, hf_affected_point_code_pc,   parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET,  AFFECTED_DPC_LENGTH,  NETWORK_BYTE_ORDER);
 423     destination_offset += AFFECTED_DESTINATION_LENGTH;
 424   }
 425   proto_item_append_text(parameter_item, " (%u destination%s)", number_of_destinations, plurality(number_of_destinations, "", "s"));
 426 }
 427
 428 #define ROUTING_CONTEXT_LENGTH 4
 429
 430 static void
 431 dissect_routing_context_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 432 {
 433   guint16 number_of_contexts, context_number;
 434   gint context_offset;
 435
 436   number_of_contexts = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 437   context_offset = PARAMETER_VALUE_OFFSET;
 438   for(context_number=1; context_number <= number_of_contexts; context_number++) {
 439     proto_tree_add_item(parameter_tree, hf_routing_context, parameter_tvb, context_offset, ROUTING_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 440     context_offset += ROUTING_CONTEXT_LENGTH;
 441   };
 442   proto_item_append_text(parameter_item, " (%u context%s)", number_of_contexts, plurality(number_of_contexts, "", "s"));
 443 }
 444
 445 #define DIAGNOSTIC_INFO_OFFSET PARAMETER_VALUE_OFFSET
 446
 447 static void
 448 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 449 {
 450   guint16 diag_info_length;
 451
 452   diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 453   proto_tree_add_item(parameter_tree, hf_diagnostic_information, parameter_tvb, DIAGNOSTIC_INFO_OFFSET, diag_info_length, NETWORK_BYTE_ORDER);
 454   proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
 455 }
 456
 457 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
 458
 459 static void
 460 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 461 {
 462   guint16 heartbeat_data_length;
 463
 464   heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 465   proto_tree_add_item(parameter_tree, hf_heartbeat_data, parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, NETWORK_BYTE_ORDER);
 466   proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
 467 }
 468
 469 #define UNKNOWN_UNAVAIL_CAUSE                  0
 470 #define UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE   1
 471 #define INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE 2
 472
 473 static const value_string unavailability_cause_values[] = {
 474   { UNKNOWN_UNAVAIL_CAUSE,                  "Unknown"                  },
 475   { UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE,   "Unequipped remote user"   },
 476   { INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE, "Inaccessable remote user" },
 477   {0,                                       NULL } };
 478
 479 #define RESERVED_0_USER_ID                0
 480 #define RESERVED_1_USER_ID                1
 481 #define RESERVED_2_USER_ID                2
 482 #define SCCP_USER_ID                      3
 483 #define TUP_USER_ID                       4
 484 #define ISUP_USER_ID                      5
 485 #define RESERVED_6_USER_ID                6
 486 #define RESERVED_7_USER_ID                7
 487 #define RESERVED_8_USER_ID                8
 488 #define BROADBAND_ISUP_USER_ID            9
 489 #define SATELLITE_ISUP_USER_ID           10
 490
 491 static const value_string user_identity_values[] = {
 492   { RESERVED_0_USER_ID,     "Reserved"       },
 493   { RESERVED_1_USER_ID,     "Reserved"       },
 494   { RESERVED_2_USER_ID,     "Reserved"       },
 495   { SCCP_USER_ID,           "SCCP"           },
 496   { TUP_USER_ID,            "TUP"            },
 497   { ISUP_USER_ID,           "ISUP"           },
 498   { RESERVED_6_USER_ID,     "Reserved"       },
 499   { RESERVED_7_USER_ID,     "Reserved"       },
 500   { RESERVED_8_USER_ID,     "Reserved"       },
 501   { BROADBAND_ISUP_USER_ID, "Broadband ISUP" },
 502   { SATELLITE_ISUP_USER_ID, "Satellite ISUP" },
 503   {0,                       NULL             } };
 504
 505 #define CAUSE_LENGTH 2
 506 #define USER_LENGTH  2
 507
 508 #define CAUSE_OFFSET  PARAMETER_VALUE_OFFSET
 509 #define USER_OFFSET   (CAUSE_OFFSET + CAUSE_LENGTH)
 510
 511 static void
 512 dissect_user_cause_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 513 {
 514   proto_tree_add_item(parameter_tree, hf_cause, parameter_tvb, CAUSE_OFFSET, CAUSE_LENGTH, NETWORK_BYTE_ORDER);
 515   proto_tree_add_item(parameter_tree, hf_user,  parameter_tvb, USER_OFFSET,  USER_LENGTH,  NETWORK_BYTE_ORDER);
 516   proto_item_append_text(parameter_item, " (%s: %s)",
 517                          val_to_str(tvb_get_ntohs(parameter_tvb, USER_OFFSET),  user_identity_values,        "Unknown user"),
 518                          val_to_str(tvb_get_ntohs(parameter_tvb, CAUSE_OFFSET), unavailability_cause_values, "unknown cause"));
 519 }
 520
 521 #define UNSPECIFIED_REASON          0
 522 #define USER_UNAVAILABLE_REASON     1
 523 #define MANAGEMENT_BLOCKING_REASON  2
 524
 525 static const value_string reason_values[] = {
 526   { UNSPECIFIED_REASON,         "Unspecified" },
 527   { USER_UNAVAILABLE_REASON,    "User unavailable" },
 528   { MANAGEMENT_BLOCKING_REASON, "Management blocking" },
 529   {0,                           NULL } };
 530
 531 #define REASON_LENGTH 4
 532 #define REASON_OFFSET PARAMETER_VALUE_OFFSET
 533
 534 static void
 535 dissect_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 536 {
 537   proto_tree_add_item(parameter_tree, hf_reason, parameter_tvb, REASON_OFFSET, REASON_LENGTH, NETWORK_BYTE_ORDER);
 538   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REASON_OFFSET), reason_values, "unknown"));
 539 }
 540
 541 #define TRAFFIC_MODE_TYPE_LENGTH 4
 542 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 543
 544 static const value_string v5_traffic_mode_type_values[] = {
 545   { 1, "Over-ride"            },
 546   { 2, "Load-share"           },
 547   { 3, "Over-ride (standby)"  },
 548   { 4, "Load-share (standby)" },
 549   { 0, NULL                   } };
 550
 551 static void
 552 dissect_v5_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 553 {
 554   proto_tree_add_item(parameter_tree, hf_v5_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 555   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"));
 556 }
 557
 558 static const value_string v6_traffic_mode_type_values[] = {
 559   { 1, "Over-ride"            },
 560   { 2, "Load-share"           },
 561   { 3, "Over-ride (standby)"  },
 562   { 4, "Load-share (standby)" },
 563   { 0, NULL                   } };
 564
 565 static void
 566 dissect_v6_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 567 {
 568   proto_tree_add_item(parameter_tree, hf_v6_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 569   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"));
 570 }
 571
 572 static const value_string traffic_mode_type_values[] = {
 573   { 1, "Over-ride"  },
 574   { 2, "Load-share" },
 575   { 3, "Broadcast"  },
 576   { 0, NULL         } };
 577
 578 static void
 579 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 580 {
 581   proto_tree_add_item(parameter_tree, hf_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 582   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), traffic_mode_type_values, "unknown"));
 583 }
 584
 585 #define ERROR_CODE_LENGTH 4
 586 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
 587
 588 static const value_string v5_error_code_values[] = {
 589   {  1, "Invalid version"               },
 590   {  2, "Invalid network appearance"    },
 591   {  3, "Unsupported message class"     },
 592   {  4, "Unsupported message type"      },
 593   {  5, "Invalid traffic handling mode" },
 594   {  6, "Unexpected message"            },
 595   {  7, "Protocol error"                },
 596   {  8, "Invalid routing context"       },
 597   {  0,  NULL                           } };
 598
 599 static void
 600 dissect_v5_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 601 {
 602   proto_tree_add_item(parameter_tree, hf_v5_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 603   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v5_error_code_values, "unknown"));
 604 }
 605
 606 static const value_string v6_error_code_values[] = {
 607   {  1, "Invalid version"               },
 608   {  2, "Invalid network appearance"    },
 609   {  3, "Unsupported message class"     },
 610   {  4, "Unsupported message type"      },
 611   {  5, "Invalid traffic handling mode" },
 612   {  6, "Unexpected message"            },
 613   {  7, "Protocol error"                },
 614   {  8, "Invalid routing context"       },
 615   {  9, "Invalid stream identifier"     },
 616   { 10, "Invalid parameter value"       },
 617   {  0,  NULL                           } };
 618
 619
 620 static void
 621 dissect_v6_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 622 {
 623   proto_tree_add_item(parameter_tree, hf_v6_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 624   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v6_error_code_values, "unknown"));
 625 }
 626
 627 static const value_string error_code_values[] = {
 628   { 0x01, "Invalid version"                   },
 629   { 0x03, "Unsupported message class"         },
 630   { 0x04, "Unsupported message type"          },
 631   { 0x05, "Unsupported traffic handling mode" },
 632   { 0x06, "Unexpected message"                },
 633   { 0x07, "Protocol error"                    },
 634   { 0x09, "Invalid stream identifier"         },
 635   { 0x0d, "Refused - management blocking"     },
 636   { 0x0e, "ASP identifier required"           },
 637   { 0x0f, "Invalid ASP identifier"            },
 638   { 0x11, "Invalid parameter value"           },
 639   { 0x12, "Parameter field error"             },
 640   { 0x13, "Unexpected parameter"              },
 641   { 0x14, "Destination status unknown"        },
 642   { 0x15, "Invalid network appearance"        },
 643   { 0x16, "Missing parameter"                 },
 644   { 0x19, "Invalid routing context"           },
 645   { 0x1a, "No configured AS for ASP"          },
 646   { 0,    NULL                                } };
 647
 648 static void
 649 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 650 {
 651   proto_tree_add_item(parameter_tree, hf_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 652   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), error_code_values, "unknown"));
 653 }
 654
 655 #define AS_STATE_CHANGE_TYPE       1
 656 #define OTHER_TYPE                 2
 657
 658 static const value_string status_type_values[] = {
 659   { AS_STATE_CHANGE_TYPE,            "Application server state change" },
 660   { OTHER_TYPE,                      "Other" },
 661   { 0,                           NULL } };
 662
 663 #define RESERVED_INFO              1
 664 #define AS_INACTIVE_INFO           2
 665 #define AS_ACTIVE_INFO             3
 666 #define AS_PENDING_INFO            4
 667
 668 #define INSUFFICIENT_ASP_RES_INFO  1
 669 #define ALTERNATE_ASP_ACTIVE_INFO  2
 670 #define ASP_FAILURE_INFO           3
 671
 672 static const value_string v56_status_type_info_values[] = {
 673   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 674   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 675   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 676   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 677   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 678   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 679   {0,                           NULL } };
 680
 681
 682 #define STATUS_TYPE_LENGTH 2
 683 #define STATUS_INFO_LENGTH 2
 684
 685 #define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 686 #define STATUS_INFO_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
 687
 688 static void
 689 dissect_v56_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 690 {
 691   guint16 status_type, status_info;
 692
 693   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 694   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 695
 696   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 697   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 698                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, v56_status_type_info_values, "unknown"), status_info);
 699
 700   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, v56_status_type_info_values, "unknown status information"));
 701 }
 702
 703 static const value_string status_type_info_values[] = {
 704   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 705   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 706   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 707   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 708   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 709   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 710   { OTHER_TYPE           * 256 * 256 + ASP_FAILURE_INFO,          "ASP Failure" },
 711   {0,                           NULL } };
 712
 713 static void
 714 dissect_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 715 {
 716   guint16 status_type, status_info;
 717
 718   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 719   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 720
 721   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 722   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 723                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown"), status_info);
 724
 725   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown status information"));
 726 }
 727
 728 static const value_string congestion_level_values[] = {
 729   { 0, "No congestion or undefined" },
 730   { 1, "Congestion level 1"         },
 731   { 2, "Congestion level 2"         },
 732   { 3, "Congestion level 3"         },
 733   { 0, NULL                         } };
 734
 735 #define CONG_IND_RESERVED_LENGTH    3
 736 #define CONG_IND_LEVEL_LENGTH       1
 737
 738 #define CONG_IND_RESERVED_OFFSET     PARAMETER_VALUE_OFFSET
 739 #define CONG_IND_LEVEL_OFFSET        (CONG_IND_RESERVED_OFFSET + CONG_IND_RESERVED_LENGTH)
 740
 741 static void
 742 dissect_congestion_indication_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 743 {
 744   proto_tree_add_item(parameter_tree, hf_congestion_reserved, parameter_tvb, CONG_IND_RESERVED_OFFSET, CONG_IND_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 745   proto_tree_add_item(parameter_tree, hf_congestion_level,    parameter_tvb, CONG_IND_LEVEL_OFFSET,    CONG_IND_LEVEL_LENGTH,    NETWORK_BYTE_ORDER);
 746   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_guint8(parameter_tvb, CONG_IND_LEVEL_OFFSET), congestion_level_values, "unknown"));
 747 }
 748
 749 #define ASP_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 750 #define ASP_IDENTIFIER_LENGTH  4
 751
 752 static void
 753 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 754 {
 755   proto_tree_add_item(parameter_tree, hf_asp_identifier, parameter_tvb, ASP_IDENTIFIER_OFFSET, ASP_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 756   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_IDENTIFIER_OFFSET));
 757 }
 758
 759 #define PROTOCOL_DATA_1_OFFSET PARAMETER_VALUE_OFFSET
 760
 761 static void
 762 dissect_protocol_data_1_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 763 {
 764   guint16 protocol_data_length;
 765   tvbuff_t *payload_tvb;
 766
 767   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 768   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_1_OFFSET, protocol_data_length, protocol_data_length);
 769   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 770   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 771   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 772 }
 773
 774 #define LI_OCTETT_LENGTH 1
 775 #define LI_OCTETT_OFFSET PARAMETER_VALUE_OFFSET
 776 #define PROTOCOL_DATA_2_OFFSET (PARAMETER_VALUE_OFFSET + LI_OCTETT_LENGTH)
 777
 778 static void
 779 dissect_protocol_data_2_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
 780 {
 781   guint8 li;
 782   guint16 protocol_data_length;
 783   tvbuff_t *payload_tvb;
 784
 785   li                   = tvb_get_guint8(parameter_tvb, LI_OCTETT_OFFSET);
 786   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - LI_OCTETT_LENGTH;
 787   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_2_OFFSET, protocol_data_length, protocol_data_length);
 788   proto_tree_add_item(parameter_tree, hf_li, parameter_tvb, LI_OCTETT_OFFSET, LI_OCTETT_LENGTH, NETWORK_BYTE_ORDER);
 789   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 790   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + LI_OCTETT_LENGTH);
 791   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 792 }
 793
 794
 795
 796 #define CON_DEST_RESERVED_LENGTH    1
 797 #define CON_DEST_PC_LENGTH          3
 798
 799 #define CON_DEST_RESERVED_OFFSET    PARAMETER_VALUE_OFFSET
 800 #define CON_DEST_PC_OFFSET          (CON_DEST_RESERVED_OFFSET + CON_DEST_RESERVED_LENGTH)
 801
 802 static void
 803 dissect_concerned_destination_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 804 {
 805   proto_tree_add_item(parameter_tree, hf_concerned_dest_reserved, parameter_tvb, CON_DEST_RESERVED_OFFSET, CON_DEST_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 806   proto_tree_add_item(parameter_tree, hf_concerned_dest_pc,       parameter_tvb, CON_DEST_PC_OFFSET,       CON_DEST_PC_LENGTH,       NETWORK_BYTE_ORDER);
 807   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, CON_DEST_PC_OFFSET));
 808 }
 809
 810 static void
 811 dissect_routing_key_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 812 {
 813   tvbuff_t *parameters_tvb;
 814   guint16 length, parameters_length;
 815
 816   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 817   parameters_length = length - PARAMETER_HEADER_LENGTH;
 818   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 819   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 820 }
 821
 822 static const value_string registration_result_status_values[] = {
 823   { 0, "Successfully Registered" } ,
 824   { 1, "Error - Unknown" } ,
 825   { 2, "Error - Invalid DPC" } ,
 826   { 3, "Error - Invalid Network Appearance" } ,
 827   { 4, "Error - Invalid Routing Key" } ,
 828   { 5, "Error - Permission Denied" } ,
 829   { 6, "Error - Overlapping (Non-unique) Routing Key" } ,
 830   { 7, "Error - Routing Key not Provisioned" } ,
 831   { 8, "Error - Insufficient Resources" } ,
 832   { 0, NULL } };
 833
 834 #define REG_RES_IDENTIFIER_LENGTH 4
 835 #define REG_RES_STATUS_LENGTH     4
 836 #define REG_RES_CONTEXT_LENGTH    4
 837
 838 #define REG_RES_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 839 #define REG_RES_STATUS_OFFSET     (REG_RES_IDENTIFIER_OFFSET + REG_RES_IDENTIFIER_LENGTH)
 840 #define REG_RES_CONTEXT_OFFSET    (REG_RES_STATUS_OFFSET + REG_RES_STATUS_LENGTH)
 841
 842 static void
 843 dissect_v6_registration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 844 {
 845   proto_tree_add_item(parameter_tree, hf_registration_result_identifier, parameter_tvb, REG_RES_IDENTIFIER_OFFSET, REG_RES_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 846   proto_tree_add_item(parameter_tree, hf_registration_result_status,     parameter_tvb, REG_RES_STATUS_OFFSET,     REG_RES_STATUS_LENGTH,     NETWORK_BYTE_ORDER);
 847   proto_tree_add_item(parameter_tree, hf_registration_result_context,    parameter_tvb, REG_RES_CONTEXT_OFFSET,    REG_RES_CONTEXT_LENGTH,    NETWORK_BYTE_ORDER);
 848 }
 849
 850 static void
 851 dissect_registration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 852 {
 853   tvbuff_t *parameters_tvb;
 854   guint16 length, parameters_length;
 855
 856   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 857   parameters_length = length - PARAMETER_HEADER_LENGTH;
 858   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 859   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 860 }
 861
 862 static const value_string v6_deregistration_result_status_values[] = {
 863   { 0, "Successfully De-registered" } ,
 864   { 1, "Error - Unknown" } ,
 865   { 2, "Error - Invalid Routing context" } ,
 866   { 3, "Error - Permission Denied" } ,
 867   { 4, "Error - Not registered" } ,
 868   { 0, NULL } };
 869
 870 #define DEREG_RES_CONTEXT_LENGTH 4
 871 #define DEREG_RES_STATUS_LENGTH  4
 872
 873 #define DEREG_RES_CONTEXT_OFFSET PARAMETER_VALUE_OFFSET
 874 #define DEREG_RES_STATUS_OFFSET  (DEREG_RES_CONTEXT_OFFSET + DEREG_RES_CONTEXT_LENGTH)
 875
 876 static void
 877 dissect_v6_deregistration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 878 {
 879   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_context, parameter_tvb, DEREG_RES_CONTEXT_OFFSET, DEREG_RES_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 880   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_status,  parameter_tvb, DEREG_RES_STATUS_OFFSET,  DEREG_RES_STATUS_LENGTH,  NETWORK_BYTE_ORDER);
 881 }
 882
 883 static void
 884 dissect_deregistration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 885 {
 886   tvbuff_t *parameters_tvb;
 887   guint16 length, parameters_length;
 888
 889   length            = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 890   parameters_length = length - PARAMETER_HEADER_LENGTH;
 891   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 892   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 893 }
 894
 895
 896 #define LOCAL_RK_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 897 #define LOCAL_RK_IDENTIFIER_LENGTH 4
 898
 899 static void
 900 dissect_local_routing_key_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 901 {
 902   guint32 id;
 903
 904   id = tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET);
 905   proto_tree_add_item(parameter_tree, hf_local_rk_identifier, parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET, LOCAL_RK_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 906   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET));
 907 }
 908
 909 #define DPC_MASK_LENGTH    1
 910 #define DPC_PC_LENGTH      3
 911
 912 #define DPC_MASK_OFFSET    PARAMETER_VALUE_OFFSET
 913 #define DPC_PC_OFFSET      (DPC_MASK_OFFSET + DPC_MASK_LENGTH)
 914
 915 static void
 916 dissect_destination_point_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 917 {
 918   proto_tree_add_item(parameter_tree, hf_dpc_mask, parameter_tvb, DPC_MASK_OFFSET, DPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 919   proto_tree_add_item(parameter_tree, hf_dpc_pc,   parameter_tvb, DPC_PC_OFFSET,   DPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 920   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, DPC_PC_OFFSET));
 921 }
 922
 923 #define SI_LENGTH 1
 924
 925 static void
 926 dissect_service_indicators_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 927 {
 928   guint16 length, number_of_sis, si_number;
 929   gint si_offset;
 930
 931   length        = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 932   number_of_sis = length - PARAMETER_HEADER_LENGTH;
 933
 934   si_offset = PARAMETER_VALUE_OFFSET;
 935   for(si_number=1; si_number <= number_of_sis; si_number++) {
 936     proto_tree_add_item(parameter_tree, hf_si, parameter_tvb, si_offset, SI_LENGTH, NETWORK_BYTE_ORDER);
 937     si_offset += SI_LENGTH;
 938   };
 939   proto_item_append_text(parameter_item, " (%u indicator%s)", number_of_sis, plurality(number_of_sis, "", "s"));
 940
 941 }
 942 #define SSN_LENGTH 1
 943
 944 static void
 945 dissect_subsystem_numbers_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 946 {
 947   guint16 length, number_of_ssns, ssn_number;
 948   gint ssn_offset;
 949
 950   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 951   number_of_ssns = length - PARAMETER_HEADER_LENGTH;
 952
 953   ssn_offset = PARAMETER_VALUE_OFFSET;
 954   for(ssn_number=1; ssn_number <= number_of_ssns; ssn_number++) {
 955     proto_tree_add_item(parameter_tree, hf_ssn, parameter_tvb, ssn_offset, SSN_LENGTH, NETWORK_BYTE_ORDER);
 956     ssn_offset += SSN_LENGTH;
 957   };
 958   proto_item_append_text(parameter_item, " (%u number%s)", number_of_ssns, plurality(number_of_ssns, "", "s"));
 959
 960 }
 961
 962 #define OPC_MASK_LENGTH             1
 963 #define OPC_PC_LENGTH               3
 964 #define OPC_LENGTH                  (OPC_MASK_LENGTH + OPC_PC_LENGTH)
 965 #define OPC_MASK_OFFSET             0
 966 #define OPC_PC_OFFSET               (OPC_MASK_OFFSET + OPC_MASK_LENGTH)
 967
 968 static void
 969 dissect_originating_point_code_list_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 970 {
 971   guint16 length, number_of_point_codes, point_code_number;
 972   gint point_code_offset;
 973
 974   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 975   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / 4;
 976
 977   point_code_offset = PARAMETER_VALUE_OFFSET;
 978   for(point_code_number=1; point_code_number <= number_of_point_codes; point_code_number++) {
 979     proto_tree_add_item(parameter_tree, hf_opc_list_mask, parameter_tvb, point_code_offset + OPC_MASK_OFFSET, OPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 980     proto_tree_add_item(parameter_tree, hf_opc_list_pc,   parameter_tvb, point_code_offset + OPC_PC_OFFSET,   OPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 981     point_code_offset += OPC_LENGTH;
 982   };
 983   proto_item_append_text(parameter_item, " (%u point code%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
 984 }
 985
 986 #define CIC_RANGE_MASK_LENGTH             1
 987 #define CIC_RANGE_PC_LENGTH               3
 988 #define CIC_RANGE_LOWER_LENGTH            2
 989 #define CIC_RANGE_UPPER_LENGTH            2
 990 #define CIC_RANGE_LENGTH                  (CIC_RANGE_MASK_LENGTH + CIC_RANGE_PC_LENGTH + CIC_RANGE_LOWER_LENGTH + CIC_RANGE_UPPER_LENGTH)
 991 #define CIC_RANGE_MASK_OFFSET             0
 992 #define CIC_RANGE_PC_OFFSET               (CIC_RANGE_MASK_OFFSET + CIC_RANGE_MASK_LENGTH)
 993 #define CIC_RANGE_LOWER_OFFSET            (CIC_RANGE_PC_OFFSET + CIC_RANGE_PC_LENGTH)
 994 #define CIC_RANGE_UPPER_OFFSET            (CIC_RANGE_LOWER_OFFSET + CIC_RANGE_LOWER_LENGTH)
 995
 996 static void
 997 dissect_circuit_range_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 998 {
 999   guint16 length, number_of_point_codes, point_code_number;
1000   gint point_code_offset;
1001
1002   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1003   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / CIC_RANGE_LENGTH;
1004
1005   point_code_offset = PARAMETER_VALUE_OFFSET;
1006   for(point_code_number = 1; point_code_number <= number_of_point_codes; point_code_number++) {
1007     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);
1008     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);
1009     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);
1010     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);
1011     point_code_offset += CIC_RANGE_LENGTH;
1012   };
1013   proto_item_append_text(parameter_item, " (%u range%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
1014 }
1015
1016 #define DATA_OPC_LENGTH   4
1017 #define DATA_DPC_LENGTH   4
1018 #define DATA_SI_LENGTH    1
1019 #define DATA_NI_LENGTH    1
1020 #define DATA_MP_LENGTH    1
1021 #define DATA_SLS_LENGTH   1
1022 #define DATA_HDR_LENGTH   (DATA_OPC_LENGTH + DATA_DPC_LENGTH + DATA_SI_LENGTH + DATA_NI_LENGTH + DATA_MP_LENGTH + DATA_SLS_LENGTH)
1023
1024 #define DATA_OPC_OFFSET   PARAMETER_VALUE_OFFSET
1025 #define DATA_DPC_OFFSET   (DATA_OPC_OFFSET + DATA_OPC_LENGTH)
1026 #define DATA_SI_OFFSET    (DATA_DPC_OFFSET + DATA_DPC_LENGTH)
1027 #define DATA_NI_OFFSET    (DATA_SI_OFFSET  + DATA_SI_LENGTH)
1028 #define DATA_MP_OFFSET    (DATA_NI_OFFSET  + DATA_NI_LENGTH)
1029 #define DATA_SLS_OFFSET   (DATA_MP_OFFSET  + DATA_MP_LENGTH)
1030 #define DATA_ULP_OFFSET   (DATA_SLS_OFFSET + DATA_SLS_LENGTH)
1031
1032 static void
1033 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
1034 {
1035   guint16 ulp_length;
1036   tvbuff_t *payload_tvb;
1037
1038   ulp_length  = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - DATA_HDR_LENGTH;
1039
1040   if (parameter_tree) {
1041     proto_tree_add_item(parameter_tree, hf_protocol_data_opc, parameter_tvb, DATA_OPC_OFFSET, DATA_OPC_LENGTH, NETWORK_BYTE_ORDER);
1042     proto_tree_add_item(parameter_tree, hf_protocol_data_dpc, parameter_tvb, DATA_DPC_OFFSET, DATA_DPC_LENGTH, NETWORK_BYTE_ORDER);
1043     proto_tree_add_item(parameter_tree, hf_protocol_data_si,  parameter_tvb, DATA_SI_OFFSET,  DATA_SI_LENGTH,  NETWORK_BYTE_ORDER);
1044     proto_tree_add_item(parameter_tree, hf_protocol_data_ni,  parameter_tvb, DATA_NI_OFFSET,  DATA_NI_LENGTH,  NETWORK_BYTE_ORDER);
1045     proto_tree_add_item(parameter_tree, hf_protocol_data_mp,  parameter_tvb, DATA_MP_OFFSET,  DATA_MP_LENGTH,  NETWORK_BYTE_ORDER);
1046     proto_tree_add_item(parameter_tree, hf_protocol_data_sls, parameter_tvb, DATA_SLS_OFFSET, DATA_SLS_LENGTH, NETWORK_BYTE_ORDER);
1047
1048     proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", ulp_length, plurality(ulp_length, "", "s"));
1049     proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + DATA_HDR_LENGTH);
1050   }
1051
1052   payload_tvb = tvb_new_subset(parameter_tvb, DATA_ULP_OFFSET, ulp_length, ulp_length);
1053   if (!dissector_try_port(si_dissector_table, tvb_get_guint8(parameter_tvb, DATA_SI_OFFSET), payload_tvb, pinfo, tree))
1054     call_dissector(data_handle, payload_tvb, pinfo, tree);
1055 }
1056
1057 #define CORR_ID_OFFSET PARAMETER_VALUE_OFFSET
1058 #define CORR_ID_LENGTH 4
1059
1060 static void
1061 dissect_correlation_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1062 {
1063   proto_tree_add_item(parameter_tree, hf_correlation_identifier, parameter_tvb, CORR_ID_OFFSET, CORR_ID_LENGTH, NETWORK_BYTE_ORDER);
1064   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, CORR_ID_OFFSET));
1065 }
1066
1067 #define REG_STATUS_LENGTH  4
1068 #define REG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1069
1070 static const value_string registration_status_values[] = {
1071   {  0, "Successfully Registered" },
1072   {  1, "Error - Unknown" },
1073   {  2, "Error - Invalid DPC" },
1074   {  3, "Error - Invalid Network Appearance" },
1075   {  4, "Error - Invalid Routing Key" },
1076   {  5, "Error - Permission Denied" },
1077   {  6, "Error - Cannot Support Unique Routing" },
1078   {  7, "Error - Routing Key not Currently Provisioned" },
1079   {  8, "Error - Insufficient Resources" },
1080   {  9, "Error - Unsupported RK parameter Field" },
1081   { 10, "Error - Unsupported/Invalid Traffic Handling Mode" },
1082   {  0, NULL } };
1083
1084 static void
1085 dissect_registration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1086 {
1087   proto_tree_add_item(parameter_tree, hf_registration_status, parameter_tvb, REG_STATUS_OFFSET, REG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1088   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REG_STATUS_OFFSET), registration_status_values, "unknown"));
1089 }
1090
1091 #define DEREG_STATUS_LENGTH  4
1092 #define DEREG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1093
1094 static const value_string deregistration_status_values[] = {
1095   { 0, "Successfully Deregistered" },
1096   { 1, "Error - Unknown" },
1097   { 2, "Error - Invalid Routing Context" },
1098   { 3, "Error - Permission Denied" },
1099   { 4, "Error - Not Registered" },
1100   { 5, "Error - ASP Currently Active for Routing Context" },
1101   { 0, NULL } };
1102
1103 static void
1104 dissect_deregistration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1105 {
1106   proto_tree_add_item(parameter_tree, hf_deregistration_status, parameter_tvb, DEREG_STATUS_OFFSET, DEREG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1107   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, DEREG_STATUS_OFFSET), deregistration_status_values, "unknown"));
1108 }
1109
1110 static void
1111 dissect_registration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1112 {
1113   tvbuff_t *parameters_tvb;
1114   guint16 parameters_length;
1115
1116   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1117   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1118   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1119 }
1120
1121 static void
1122 dissect_deregistration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1123 {
1124   tvbuff_t *parameters_tvb;
1125   guint16 parameters_length;
1126
1127   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1128   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1129   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1130 }
1131
1132 static void
1133 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1134 {
1135   guint16 tag, parameter_value_length;
1136
1137   tag                    = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1138   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1139   proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, NETWORK_BYTE_ORDER);
1140   proto_item_append_text(parameter_item, " (tag %u and %u byte%s value)", tag, parameter_value_length, plurality(parameter_value_length, "", "s"));
1141 }
1142
1143 #define V5_NETWORK_APPEARANCE_PARAMETER_TAG       1
1144 #define V5_PROTOCOL_DATA_PARAMETER_TAG            3
1145 #define V5_INFO_PARAMETER_TAG                     4
1146 #define V5_AFFECTED_DESTINATIONS_PARAMETER_TAG    5
1147 #define V5_ROUTING_CONTEXT_PARAMETER_TAG          6
1148 #define V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG   7
1149 #define V5_HEARTBEAT_DATA_PARAMETER_TAG           8
1150 #define V5_USER_CAUSE_PARAMETER_TAG               9
1151 #define V5_REASON_PARAMETER_TAG                   10
1152 #define V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG        11
1153 #define V5_ERROR_CODE_PARAMETER_TAG               12
1154 #define V5_STATUS_PARAMETER_TAG                   13
1155 #define V5_CONGESTION_INDICATION_PARAMETER_TAG    14
1156
1157 static const value_string v5_parameter_tag_values[] = {
1158   { V5_NETWORK_APPEARANCE_PARAMETER_TAG,     "Network appearance" },
1159   { V5_PROTOCOL_DATA_PARAMETER_TAG,          "Protocol data" },
1160   { V5_INFO_PARAMETER_TAG,                   "Info" },
1161   { V5_AFFECTED_DESTINATIONS_PARAMETER_TAG,  "Affected destinations" },
1162   { V5_ROUTING_CONTEXT_PARAMETER_TAG,        "Routing context" },
1163   { V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
1164   { V5_HEARTBEAT_DATA_PARAMETER_TAG,         "Heartbeat data" },
1165   { V5_USER_CAUSE_PARAMETER_TAG,             "User / Cause" },
1166   { V5_REASON_PARAMETER_TAG,                 "Reason" },
1167   { V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG,      "Traffic mode type" },
1168   { V5_ERROR_CODE_PARAMETER_TAG,             "Error code" },
1169   { V5_STATUS_PARAMETER_TAG,                 "Status" },
1170   { V5_CONGESTION_INDICATION_PARAMETER_TAG,  "Congestion indication" },
1171   { 0,                                       NULL } };
1172
1173 static void
1174 dissect_v5_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1175 {
1176   guint16 tag, length, padding_length;
1177   proto_item *parameter_item;
1178   proto_tree *parameter_tree;
1179
1180   /* extract tag and length from the parameter */
1181   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1182   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1183   padding_length = tvb_length(parameter_tvb) - length;
1184
1185   if (!tree && tag != V5_PROTOCOL_DATA_PARAMETER_TAG)
1186     return;     /* Nothing to do here */
1187
1188   /* create proto_tree stuff */
1189   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"));
1190   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1191
1192   /* add tag and length to the parameter tree */
1193   proto_tree_add_item(parameter_tree, hf_v5_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1194   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1195
1196   switch(tag) {
1197   case V5_NETWORK_APPEARANCE_PARAMETER_TAG:
1198     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1199     break;
1200   case V5_PROTOCOL_DATA_PARAMETER_TAG:
1201     dissect_v5_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_item);
1202     break;
1203   case V5_INFO_PARAMETER_TAG:
1204     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1205     break;
1206   case V5_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1207     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1208     break;
1209   case V5_ROUTING_CONTEXT_PARAMETER_TAG:
1210     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1211     break;
1212   case V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1213     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1214     break;
1215   case V5_HEARTBEAT_DATA_PARAMETER_TAG:
1216     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1217     break;
1218   case V5_USER_CAUSE_PARAMETER_TAG:
1219     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1220     break;
1221   case V5_REASON_PARAMETER_TAG:
1222     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1223     break;
1224   case V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1225     dissect_v5_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1226     break;
1227   case V5_ERROR_CODE_PARAMETER_TAG:
1228     dissect_v5_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1229     break;
1230   case V5_STATUS_PARAMETER_TAG:
1231     dissect_v56_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1232     break;
1233   case V5_CONGESTION_INDICATION_PARAMETER_TAG:
1234     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1235     break;
1236   default:
1237     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1238     break;
1239   };
1240   if (padding_length > 0)
1241     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1242 }
1243
1244 #define V6_NETWORK_APPEARANCE_PARAMETER_TAG            1
1245 #define V6_PROTOCOL_DATA_1_PARAMETER_TAG               2
1246 #define V6_PROTOCOL_DATA_2_PARAMETER_TAG               3
1247 #define V6_INFO_PARAMETER_TAG                          4
1248 #define V6_AFFECTED_DESTINATIONS_PARAMETER_TAG         5
1249 #define V6_ROUTING_CONTEXT_PARAMETER_TAG               6
1250 #define V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG        7
1251 #define V6_HEARTBEAT_DATA_PARAMETER_TAG                8
1252 #define V6_USER_CAUSE_PARAMETER_TAG                    9
1253 #define V6_REASON_PARAMETER_TAG                       10
1254 #define V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG            11
1255 #define V6_ERROR_CODE_PARAMETER_TAG                   12
1256 #define V6_STATUS_PARAMETER_TAG                       13
1257 #define V6_CONGESTION_INDICATION_PARAMETER_TAG        14
1258 #define V6_CONCERNED_DESTINATION_PARAMETER_TAG        15
1259 #define V6_ROUTING_KEY_PARAMETER_TAG                  16
1260 #define V6_REGISTRATION_RESULT_PARAMETER_TAG          17
1261 #define V6_DEREGISTRATION_RESULT_PARAMETER_TAG        18
1262 #define V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 19
1263 #define V6_DESTINATION_POINT_CODE_PARAMETER_TAG       20
1264 #define V6_SERVICE_INDICATORS_PARAMETER_TAG           21
1265 #define V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG            22
1266 #define V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  23
1267 #define V6_CIRCUIT_RANGE_PARAMETER_TAG                24
1268 #define V6_REGISTRATION_RESULTS_PARAMETER_TAG         25
1269 #define V6_DEREGISTRATION_RESULTS_PARAMETER_TAG       26
1270
1271 static const value_string v6_parameter_tag_values[] = {
1272   { V6_NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" },
1273   { V6_PROTOCOL_DATA_1_PARAMETER_TAG,              "Protocol data 1" },
1274   { V6_PROTOCOL_DATA_2_PARAMETER_TAG,              "Protocol data 2" },
1275   { V6_INFO_PARAMETER_TAG,                         "Info" },
1276   { V6_AFFECTED_DESTINATIONS_PARAMETER_TAG,        "Affected destinations" },
1277   { V6_ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" },
1278   { V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic information" },
1279   { V6_HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" },
1280   { V6_USER_CAUSE_PARAMETER_TAG,                   "User / Cause" },
1281   { V6_REASON_PARAMETER_TAG,                       "Reason" },
1282   { V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" },
1283   { V6_ERROR_CODE_PARAMETER_TAG,                   "Error code" },
1284   { V6_STATUS_PARAMETER_TAG,                       "Status" },
1285   { V6_CONGESTION_INDICATION_PARAMETER_TAG,        "Congestion indication" },
1286   { V6_CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" },
1287   { V6_ROUTING_KEY_PARAMETER_TAG,                  "Routing Key" },
1288   { V6_REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" },
1289   { V6_DEREGISTRATION_RESULT_PARAMETER_TAG,        "De-registration result" },
1290   { V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" },
1291   { V6_DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" },
1292   { V6_SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" },
1293   { V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG,            "Subsystem numbers" },
1294   { V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" },
1295   { V6_CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" },
1296   { V6_REGISTRATION_RESULTS_PARAMETER_TAG,         "Registration results" },
1297   { V6_DEREGISTRATION_RESULTS_PARAMETER_TAG,       "De-registration results" },
1298   { 0,                           NULL } };
1299
1300 static void
1301 dissect_v6_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1302 {
1303   guint16 tag, length, padding_length;
1304   proto_item *parameter_item;
1305   proto_tree *parameter_tree;
1306
1307   /* extract tag and length from the parameter */
1308   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1309   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1310   padding_length = tvb_length(parameter_tvb) - length;
1311
1312   if (!tree && tag != V6_PROTOCOL_DATA_1_PARAMETER_TAG && tag != V6_PROTOCOL_DATA_2_PARAMETER_TAG)
1313     return;     /* Nothing to do here */
1314
1315   /* create proto_tree stuff */
1316   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"));
1317   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1318
1319   /* add tag and length to the parameter tree */
1320   proto_tree_add_item(parameter_tree, hf_v6_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1321   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1322
1323   switch(tag) {
1324   case V6_NETWORK_APPEARANCE_PARAMETER_TAG:
1325     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1326     break;
1327   case V6_PROTOCOL_DATA_1_PARAMETER_TAG:
1328     dissect_protocol_data_1_parameter(parameter_tvb, pinfo, tree, parameter_item);
1329     break;
1330   case V6_PROTOCOL_DATA_2_PARAMETER_TAG:
1331     dissect_protocol_data_2_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1332     break;
1333   case V6_INFO_PARAMETER_TAG:
1334     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1335     break;
1336   case V6_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1337     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1338     break;
1339   case V6_ROUTING_CONTEXT_PARAMETER_TAG:
1340     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1341     break;
1342   case V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1343     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1344     break;
1345   case V6_HEARTBEAT_DATA_PARAMETER_TAG:
1346     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1347     break;
1348   case V6_USER_CAUSE_PARAMETER_TAG:
1349     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1350     break;
1351   case V6_REASON_PARAMETER_TAG:
1352     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1353     break;
1354   case V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1355     dissect_v6_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1356     break;
1357   case V6_ERROR_CODE_PARAMETER_TAG:
1358     dissect_v6_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1359     break;
1360   case V6_STATUS_PARAMETER_TAG:
1361     dissect_v56_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1362     break;
1363   case V6_CONGESTION_INDICATION_PARAMETER_TAG:
1364     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1365     break;
1366   case V6_CONCERNED_DESTINATION_PARAMETER_TAG:
1367     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1368     break;
1369   case V6_ROUTING_KEY_PARAMETER_TAG:
1370     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1371     break;
1372   case V6_REGISTRATION_RESULT_PARAMETER_TAG:
1373     dissect_v6_registration_result_parameter(parameter_tvb, parameter_tree);
1374     break;
1375   case V6_DEREGISTRATION_RESULT_PARAMETER_TAG:
1376     dissect_v6_deregistration_result_parameter(parameter_tvb, parameter_tree);
1377     break;
1378   case V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1379     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1380     break;
1381   case V6_DESTINATION_POINT_CODE_PARAMETER_TAG:
1382     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1383     break;
1384   case V6_SERVICE_INDICATORS_PARAMETER_TAG:
1385     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1386     break;
1387   case V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG:
1388     dissect_subsystem_numbers_parameter(parameter_tvb, parameter_tree, parameter_item);
1389     break;
1390   case V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1391     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1392     break;
1393   case V6_CIRCUIT_RANGE_PARAMETER_TAG:
1394     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1395     break;
1396   case V6_REGISTRATION_RESULTS_PARAMETER_TAG:
1397     dissect_registration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1398     break;
1399   case V6_DEREGISTRATION_RESULTS_PARAMETER_TAG:
1400     dissect_deregistration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1401     break;
1402   default:
1403     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1404     break;
1405   };
1406
1407   if (padding_length > 0)
1408     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1409 }
1410
1411 #define INFO_STRING_PARAMETER_TAG                  0x0004
1412 #define ROUTING_CONTEXT_PARAMETER_TAG              0x0006
1413 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG       0x0007
1414 #define HEARTBEAT_DATA_PARAMETER_TAG               0x0009
1415 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG            0x000b
1416 #define ERROR_CODE_PARAMETER_TAG                   0x000c
1417 #define STATUS_PARAMETER_TAG                       0x000d
1418 #define ASP_IDENTIFIER_PARAMETER_TAG               0x0011
1419 #define AFFECTED_POINT_CODE_PARAMETER_TAG          0x0012
1420 #define CORRELATION_IDENTIFIER_PARAMETER_TAG       0x0013
1421
1422 #define NETWORK_APPEARANCE_PARAMETER_TAG           0x0200
1423 #define USER_CAUSE_PARAMETER_TAG                   0x0204
1424 #define CONGESTION_INDICATIONS_PARAMETER_TAG       0x0205
1425 #define CONCERNED_DESTINATION_PARAMETER_TAG        0x0206
1426 #define ROUTING_KEY_PARAMETER_TAG                  0x0207
1427 #define REGISTRATION_RESULT_PARAMETER_TAG          0x0208
1428 #define DEREGISTRATION_RESULT_PARAMETER_TAG        0x0209
1429 #define LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 0x020a
1430 #define DESTINATION_POINT_CODE_PARAMETER_TAG       0x020b
1431 #define SERVICE_INDICATORS_PARAMETER_TAG           0x020c
1432 #define ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  0x020e
1433 #define CIRCUIT_RANGE_PARAMETER_TAG                0x020f
1434 #define PROTOCOL_DATA_PARAMETER_TAG                0x0210
1435 #define REGISTRATION_STATUS_PARAMETER_TAG          0x0212
1436 #define DEREGISTRATION_STATUS_PARAMETER_TAG        0x0213
1437
1438 static const value_string parameter_tag_values[] = {
1439   { INFO_STRING_PARAMETER_TAG,                  "Info string" } ,
1440   { ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" } ,
1441   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic Information" } ,
1442   { HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" } ,
1443   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" } ,
1444   { ERROR_CODE_PARAMETER_TAG,                   "Error code" } ,
1445   { STATUS_PARAMETER_TAG,                       "Status" } ,
1446   { ASP_IDENTIFIER_PARAMETER_TAG,               "ASP identifier" } ,
1447   { AFFECTED_POINT_CODE_PARAMETER_TAG,          "Affected point code" } ,
1448   { CORRELATION_IDENTIFIER_PARAMETER_TAG,       "Correlation identifier" } ,
1449   { NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" } ,
1450   { USER_CAUSE_PARAMETER_TAG,                   "User / cause" } ,
1451   { CONGESTION_INDICATIONS_PARAMETER_TAG,       "Congestion indications" } ,
1452   { CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" } ,
1453   { ROUTING_KEY_PARAMETER_TAG,                  "Routing key" } ,
1454   { REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" } ,
1455   { DEREGISTRATION_RESULT_PARAMETER_TAG,        "Deregistration result" } ,
1456   { LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" } ,
1457   { DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" } ,
1458   { SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" } ,
1459   { ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" } ,
1460   { CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" } ,
1461   { PROTOCOL_DATA_PARAMETER_TAG,                "Protocol data" } ,
1462   { REGISTRATION_STATUS_PARAMETER_TAG,          "Registration status" } ,
1463   { DEREGISTRATION_STATUS_PARAMETER_TAG,        "Deregistration status" } ,
1464   { 0,                           NULL } };
1465
1466 static void
1467 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1468 {
1469   guint16 tag, length, padding_length;
1470   proto_item *parameter_item;
1471   proto_tree *parameter_tree;
1472
1473   /* extract tag and length from the parameter */
1474   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1475   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1476   padding_length = tvb_length(parameter_tvb) - length;
1477
1478
1479   if (!tree && tag != PROTOCOL_DATA_PARAMETER_TAG)
1480     return;     /* Nothing to do here */
1481
1482   /* create proto_tree stuff */
1483   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"));
1484   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1485
1486   /* add tag and length to the parameter tree */
1487   proto_tree_add_item(parameter_tree, hf_parameter_tag,    parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1488   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1489
1490   switch(tag) {
1491   case INFO_STRING_PARAMETER_TAG:
1492     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1493     break;
1494   case ROUTING_CONTEXT_PARAMETER_TAG:
1495     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1496     break;
1497   case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1498     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1499     break;
1500   case HEARTBEAT_DATA_PARAMETER_TAG:
1501     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1502     break;
1503   case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1504     dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1505     break;
1506   case ERROR_CODE_PARAMETER_TAG:
1507     dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1508     break;
1509   case STATUS_PARAMETER_TAG:
1510     dissect_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1511     break;
1512   case ASP_IDENTIFIER_PARAMETER_TAG:
1513     dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1514     break;
1515   case AFFECTED_POINT_CODE_PARAMETER_TAG:
1516     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1517     break;
1518   case NETWORK_APPEARANCE_PARAMETER_TAG:
1519     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1520     break;
1521   case USER_CAUSE_PARAMETER_TAG:
1522     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1523     break;
1524   case CONGESTION_INDICATIONS_PARAMETER_TAG:
1525     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1526     break;
1527   case CONCERNED_DESTINATION_PARAMETER_TAG:
1528     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1529     break;
1530   case ROUTING_KEY_PARAMETER_TAG:
1531     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1532     break;
1533   case REGISTRATION_RESULT_PARAMETER_TAG:
1534     dissect_registration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1535     break;
1536   case DEREGISTRATION_RESULT_PARAMETER_TAG:
1537     dissect_deregistration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1538     break;
1539   case LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1540     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1541     break;
1542   case DESTINATION_POINT_CODE_PARAMETER_TAG:
1543     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1544     break;
1545   case SERVICE_INDICATORS_PARAMETER_TAG:
1546     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1547     break;
1548   case ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1549     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1550     break;
1551   case CIRCUIT_RANGE_PARAMETER_TAG:
1552     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1553     break;
1554   case PROTOCOL_DATA_PARAMETER_TAG:
1555     dissect_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1556     break;
1557   case CORRELATION_IDENTIFIER_PARAMETER_TAG:
1558     dissect_correlation_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1559     break;
1560   case REGISTRATION_STATUS_PARAMETER_TAG:
1561     dissect_registration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1562     break;
1563   case DEREGISTRATION_STATUS_PARAMETER_TAG:
1564     dissect_deregistration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1565     break;
1566   default:
1567     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1568     break;
1569   };
1570
1571   if (padding_length > 0)
1572     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1573 }
1574
1575 static void
1576 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1577 {
1578   gint offset, length, total_length, remaining_length;
1579   tvbuff_t *parameter_tvb;
1580
1581   offset = 0;
1582   while((remaining_length = tvb_length_remaining(parameters_tvb, offset))) {
1583     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
1584     total_length = ADD_PADDING(length);
1585     if (remaining_length >= length)
1586       total_length = MIN(total_length, remaining_length);
1587     /* create a tvb for the parameter including the padding bytes */
1588     parameter_tvb    = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
1589     switch(version) {
1590       case M3UA_V5:
1591         dissect_v5_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1592         break;
1593       case M3UA_V6:
1594         dissect_v6_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1595         break;
1596       case M3UA_RFC:
1597         dissect_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1598         break;
1599     }
1600     /* get rid of the handled parameter */
1601     offset += total_length;
1602   }
1603 }
1604
1605
1606 static void
1607 dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1608 {
1609   tvbuff_t *common_header_tvb, *parameters_tvb;
1610
1611   common_header_tvb = tvb_new_subset(message_tvb, 0, COMMON_HEADER_LENGTH, COMMON_HEADER_LENGTH);
1612   parameters_tvb    = tvb_new_subset(message_tvb, COMMON_HEADER_LENGTH, -1, -1);
1613   if (version == M3UA_V5)
1614         dissect_v5_common_header(common_header_tvb, pinfo, m3ua_tree);
1615   else
1616     dissect_common_header(common_header_tvb, pinfo, m3ua_tree);
1617
1618   /*  Need to dissect (certain) parameters even when !tree, so subdissectors
1619    *  (e.g., MTP3) are always called.
1620    */
1621   dissect_parameters(parameters_tvb, pinfo, tree, m3ua_tree);
1622 }
1623
1624 static void
1625 dissect_m3ua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
1626 {
1627   proto_item *m3ua_item;
1628   proto_tree *m3ua_tree;
1629
1630   /* make entry in the Protocol column on summary display */
1631   if (check_col(pinfo->cinfo, COL_PROTOCOL))
1632     col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA");
1633
1634   /* In the interest of speed, if "tree" is NULL, don't do any work not
1635      necessary to generate protocol tree items. */
1636   if (tree) {
1637     /* create the m3ua protocol tree */
1638     m3ua_item = proto_tree_add_item(tree, proto_m3ua, message_tvb, 0, -1, FALSE);
1639     m3ua_tree = proto_item_add_subtree(m3ua_item, ett_m3ua);
1640   } else {
1641     m3ua_tree = NULL;
1642   };
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 }