packet-m3ua.c

   1 /* packet-m3ua.c
   2  * Routines for MTP3 User Adaptation Layer dissection
   3  * It is hopefully (needs testing) compilant to
   4  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-05.txt (expired)
   5  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-06.txt (expired)
   6  * http://www.ietf.org/internet-drafts/draft-ietf-sigtran-m3ua-07.txt (expired)
   7  * http://www.ietf.org/rfc/rfc3332.txt
   8  *
   9  * Copyright 2000, 2001, 2002, 2003, 2004 Michael Tuexen <tuexen [AT] fh-muenster.de>
  10  *
  11  * $Id: packet-m3ua.c,v 1.39 2004/03/25 23:25:20 tuexen Exp $
  12  *
  13  * Ethereal - Network traffic analyzer
  14  * By Gerald Combs <gerald@ethereal.com>
  15  * Copyright 1998 Gerald Combs
  16  *
  17  * Copied from README.developer
  18  *
  19  * This program is free software; you can redistribute it and/or
  20  * modify it under the terms of the GNU General Public License
  21  * as published by the Free Software Foundation; either version 2
  22  * of the License, or (at your option) any later version.
  23  *
  24  * This program is distributed in the hope that it will be useful,
  25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  27  * GNU General Public License for more details.
  28  *
  29  * You should have received a copy of the GNU General Public License
  30  * along with this program; if not, write to the Free Software
  31  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  32  */
  33
  34 #ifdef HAVE_CONFIG_H
  35 # include "config.h"
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40
  41
  42 #include <string.h>
  43 #include <glib.h>
  44
  45 #include <epan/packet.h>
  46 #include "prefs.h"
  47 #include "sctpppids.h"
  48
  49 #define SCTP_PORT_M3UA         2905
  50 #define NETWORK_BYTE_ORDER     FALSE
  51 #define ADD_PADDING(x) ((((x) + 3) >> 2) << 2)
  52
  53 #define VERSION_LENGTH         1
  54 #define RESERVED_LENGTH        1
  55 #define MESSAGE_CLASS_LENGTH   1
  56 #define MESSAGE_TYPE_LENGTH    1
  57 #define MESSAGE_LENGTH_LENGTH  4
  58 #define COMMON_HEADER_LENGTH   (VERSION_LENGTH + RESERVED_LENGTH + MESSAGE_CLASS_LENGTH + \
  59                                 MESSAGE_TYPE_LENGTH + MESSAGE_LENGTH_LENGTH)
  60
  61 #define VERSION_OFFSET         0
  62 #define RESERVED_OFFSET        (VERSION_OFFSET + VERSION_LENGTH)
  63 #define MESSAGE_CLASS_OFFSET   (RESERVED_OFFSET + RESERVED_LENGTH)
  64 #define MESSAGE_TYPE_OFFSET    (MESSAGE_CLASS_OFFSET + MESSAGE_CLASS_LENGTH)
  65 #define MESSAGE_LENGTH_OFFSET  (MESSAGE_TYPE_OFFSET + MESSAGE_TYPE_LENGTH)
  66
  67 #define PARAMETER_TAG_LENGTH    2
  68 #define PARAMETER_LENGTH_LENGTH 2
  69 #define PARAMETER_HEADER_LENGTH (PARAMETER_TAG_LENGTH + PARAMETER_LENGTH_LENGTH)
  70
  71 #define PARAMETER_TAG_OFFSET    0
  72 #define PARAMETER_LENGTH_OFFSET (PARAMETER_TAG_OFFSET + PARAMETER_TAG_LENGTH)
  73 #define PARAMETER_VALUE_OFFSET  (PARAMETER_LENGTH_OFFSET + PARAMETER_LENGTH_LENGTH)
  74 #define PARAMETER_HEADER_OFFSET PARAMETER_TAG_OFFSET
  75
  76 #define PROTOCOL_VERSION_RELEASE_1             1
  77
  78 static const value_string protocol_version_values[] = {
  79   { PROTOCOL_VERSION_RELEASE_1,  "Release 1" },
  80   { 0,                           NULL } };
  81
  82 #define MESSAGE_CLASS_MGMT_MESSAGE        0
  83 #define MESSAGE_CLASS_TFER_MESSAGE        1
  84 #define MESSAGE_CLASS_SSNM_MESSAGE        2
  85 #define MESSAGE_CLASS_ASPSM_MESSAGE       3
  86 #define MESSAGE_CLASS_ASPTM_MESSAGE       4
  87 #define MESSAGE_CLASS_RKM_MESSAGE         9
  88
  89 static const value_string message_class_values[] = {
  90   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
  91   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
  92   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
  93   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
  94   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
  95   { MESSAGE_CLASS_RKM_MESSAGE,    "Routing key management messages" },
  96   { 0,                           NULL } };
  97
  98 static const value_string v5_message_class_values[] = {
  99   { MESSAGE_CLASS_MGMT_MESSAGE,   "Management messages" },
 100   { MESSAGE_CLASS_TFER_MESSAGE,   "Transfer messages" },
 101   { MESSAGE_CLASS_SSNM_MESSAGE,   "SS7 signalling network management messages" },
 102   { MESSAGE_CLASS_ASPSM_MESSAGE,  "ASP state maintenance messages" },
 103   { MESSAGE_CLASS_ASPTM_MESSAGE,  "ASP traffic maintenance messages" },
 104   { 0,                           NULL } };
 105
 106 #define MESSAGE_TYPE_ERR                  0
 107 #define MESSAGE_TYPE_NTFY                 1
 108
 109 #define MESSAGE_TYPE_DATA                 1
 110
 111 #define MESSAGE_TYPE_DUNA                 1
 112 #define MESSAGE_TYPE_DAVA                 2
 113 #define MESSAGE_TYPE_DAUD                 3
 114 #define MESSAGE_TYPE_SCON                 4
 115 #define MESSAGE_TYPE_DUPU                 5
 116 #define MESSAGE_TYPE_DRST                 6
 117
 118 #define MESSAGE_TYPE_UP                   1
 119 #define MESSAGE_TYPE_DOWN                 2
 120 #define MESSAGE_TYPE_BEAT                 3
 121 #define MESSAGE_TYPE_UP_ACK               4
 122 #define MESSAGE_TYPE_DOWN_ACK             5
 123 #define MESSAGE_TYPE_BEAT_ACK             6
 124
 125 #define MESSAGE_TYPE_ACTIVE               1
 126 #define MESSAGE_TYPE_INACTIVE             2
 127 #define MESSAGE_TYPE_ACTIVE_ACK           3
 128 #define MESSAGE_TYPE_INACTIVE_ACK         4
 129
 130 #define MESSAGE_TYPE_REG_REQ              1
 131 #define MESSAGE_TYPE_REG_RSP              2
 132 #define MESSAGE_TYPE_DEREG_REQ            3
 133 #define MESSAGE_TYPE_DEREG_RSP            4
 134
 135 static const value_string v5_message_class_type_values[] = {
 136   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 137   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 138   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 139   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 140   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 141   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 142   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 143   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 144   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (UP)" },
 145   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (DOWN)" },
 146   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 147   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (UP ACK)" },
 148   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (DOWN ACK)" },
 149   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT ACK)" },
 150   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ACTIVE)" },
 151   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (INACTIVE)" },
 152   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ACTIVE ACK)" },
 153   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (INACTIVE ACK)" },
 154   { 0,                                                              NULL } };
 155
 156 static const value_string message_class_type_values[] = {
 157   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "Error (ERR)" },
 158   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "Notify (NTFY)" },
 159   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "Payload data (DATA)" },
 160   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "Destination unavailable (DUNA)" },
 161   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "Destination available (DAVA)" },
 162   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "Destination state audit (DAUD)" },
 163   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SS7 Network congestion state (SCON)" },
 164   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "Destination userpart unavailable (DUPU)" },
 165   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "Destination Restricted (DRST)" },
 166   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP up (ASPUP)" },
 167   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP down (ASPDN)" },
 168   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "Heartbeat (BEAT)" },
 169   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP up ack (ASPUP_ACK)" },
 170   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP down ack (ASPDN_ACK)" },
 171   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "Heartbeat ack (BEAT_ACK)" },
 172   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP active (ASPAC)" },
 173   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP inactive (ASPIA)" },
 174   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP active ack (ASPAC_ACK)" },
 175   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP inactive ack (ASPIA_ACK)" },
 176   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "Registration request (REG_REQ)" },
 177   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "Registration response (REG_RSP)" },
 178   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "Deregistration request (DEREG_REQ)" },
 179   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "Deregistration response (DEREG_RSP)" },
 180   { 0,                           NULL } };
 181
 182 static const value_string v5_message_class_type_acro_values[] = {
 183   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 184   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 185   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 186   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 187   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 188   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 189   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 190   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 191   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASP_UP" },
 192   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASP_DOWN" },
 193   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 194   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASP_UP_ACK" },
 195   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASP_DOWN_ACK" },
 196   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 197   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASP_ACTIVE" },
 198   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASP_INACTIVE" },
 199   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASP_ACTIVE_ACK" },
 200   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASP_INACTIVE_ACK" },
 201   { 0,                                                              NULL } };
 202
 203 static const value_string message_class_type_acro_values[] = {
 204   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_ERR,           "ERR" },
 205   { MESSAGE_CLASS_MGMT_MESSAGE  * 256 + MESSAGE_TYPE_NTFY,          "NTFY" },
 206   { MESSAGE_CLASS_TFER_MESSAGE  * 256 + MESSAGE_TYPE_DATA,          "DATA" },
 207   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUNA,          "DUNA" },
 208   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAVA,          "DAVA" },
 209   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DAUD,          "DAUD" },
 210   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_SCON,          "SCON" },
 211   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DUPU,          "DUPU" },
 212   { MESSAGE_CLASS_SSNM_MESSAGE  * 256 + MESSAGE_TYPE_DRST,          "DRST" },
 213   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP,            "ASPUP" },
 214   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN,          "ASPDN" },
 215   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT,          "BEAT" },
 216   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_UP_ACK,        "ASPUP_ACK" },
 217   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_DOWN_ACK,      "ASPDN_ACK" },
 218   { MESSAGE_CLASS_ASPSM_MESSAGE * 256 + MESSAGE_TYPE_BEAT_ACK,      "BEAT_ACK" },
 219   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE ,       "ASPAC" },
 220   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE ,     "ASPIA" },
 221   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_ACTIVE_ACK ,   "ASPAC_ACK" },
 222   { MESSAGE_CLASS_ASPTM_MESSAGE * 256 + MESSAGE_TYPE_INACTIVE_ACK , "ASPIA_ACK" },
 223   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_REQ ,      "REG_REQ" },
 224   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_REG_RSP ,      "REG_RSP" },
 225   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_REQ ,    "DEREG_REQ" },
 226   { MESSAGE_CLASS_RKM_MESSAGE   * 256 + MESSAGE_TYPE_DEREG_RSP ,    "DEREG_RSP" },
 227   { 0,                           NULL } };
 228
 229 /* Initialize the protocol and registered fields */
 230 static int proto_m3ua = -1;
 231 static int hf_version = -1;
 232 static int hf_reserved = -1;
 233 static int hf_message_class = -1;
 234 static int hf_v5_message_class = -1;
 235 static int hf_message_type = -1;
 236 static int hf_message_length = -1;
 237 static int hf_v5_parameter_tag = -1;
 238 static int hf_v6_parameter_tag = -1;
 239 static int hf_v7_parameter_tag = -1;
 240 static int hf_parameter_tag = -1;
 241 static int hf_parameter_length = -1;
 242 static int hf_parameter_value = -1;
 243 static int hf_parameter_padding = -1;
 244 static int hf_parameter_trailer = -1;
 245 static int hf_network_appearance = -1;
 246 static int hf_info_string = -1;
 247 static int hf_routing_context = -1;
 248 static int hf_diagnostic_information = -1;
 249 static int hf_heartbeat_data = -1;
 250 static int hf_v5_error_code = -1;
 251 static int hf_v6_error_code = -1;
 252 static int hf_v7_error_code = -1;
 253 static int hf_error_code = -1;
 254 static int hf_status_type = -1;
 255 static int hf_status_info = -1;
 256 static int hf_asp_identifier = -1;
 257 static int hf_affected_point_code_mask = -1;
 258 static int hf_affected_point_code_pc = -1;
 259 static int hf_cause = -1;
 260 static int hf_user = -1;
 261 static int hf_reason = -1;
 262 static int hf_v5_traffic_mode_type = -1;
 263 static int hf_v6_traffic_mode_type = -1;
 264 static int hf_v7_traffic_mode_type = -1;
 265 static int hf_traffic_mode_type = -1;
 266 static int hf_congestion_reserved = -1;
 267 static int hf_congestion_level = -1;
 268 static int hf_concerned_dest_reserved = -1;
 269 static int hf_concerned_dest_pc = -1;
 270 static int hf_local_rk_identifier = -1;
 271 static int hf_dpc_mask = -1;
 272 static int hf_dpc_pc = -1;
 273 static int hf_si = -1;
 274 static int hf_ssn = -1;
 275 static int hf_opc_list_mask = -1;
 276 static int hf_opc_list_pc = -1;
 277 static int hf_cic_range_mask = -1;
 278 static int hf_cic_range_pc = -1;
 279 static int hf_cic_range_upper = -1;
 280 static int hf_cic_range_lower = -1;
 281 static int hf_protocol_data_opc = -1;
 282 static int hf_protocol_data_dpc = -1;
 283 static int hf_protocol_data_si = -1;
 284 static int hf_protocol_data_ni = -1;
 285 static int hf_protocol_data_mp = -1;
 286 static int hf_protocol_data_sls = -1;
 287 static int hf_correlation_identifier = -1;
 288 static int hf_registration_status = -1;
 289 static int hf_deregistration_status = -1;
 290 static int hf_registration_result_identifier = -1;
 291 static int hf_registration_result_status = -1;
 292 static int hf_registration_result_context = -1;
 293 static int hf_v6_deregistration_result_status = -1;
 294 static int hf_v6_deregistration_result_context = -1;
 295 static int hf_li = -1;
 296
 297 /* Initialize the subtree pointers */
 298 static gint ett_m3ua = -1;
 299 static gint ett_parameter = -1;
 300
 301 static module_t *m3ua_module;
 302 static dissector_handle_t mtp3_handle, data_handle;
 303 static dissector_table_t si_dissector_table;
 304
 305 /* stuff for supporting multiple versions */
 306 typedef enum {
 307   M3UA_V5,
 308   M3UA_V6,
 309   M3UA_V7,
 310   M3UA_RFC
 311 } Version_Type;
 312
 313 static Version_Type version = M3UA_RFC;
 314
 315 static void
 316 dissect_parameters(tvbuff_t *, packet_info *, proto_tree *, proto_tree *);
 317
 318 static void
 319 dissect_v5_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 320 {
 321   guint8  message_class, message_type;
 322
 323   /* Extract the common header */
 324   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 325   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 326
 327   if (check_col(pinfo->cinfo, COL_INFO))
 328     col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(message_class * 256 + message_type, v5_message_class_type_acro_values, "reserved"));
 329
 330   if (m3ua_tree) {
 331     /* add the components of the common header to the protocol tree */
 332     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 333     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 334     proto_tree_add_item(m3ua_tree, hf_v5_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 335     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 336                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, v5_message_class_type_values, "reserved"), message_type);
 337     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 338   }
 339 }
 340
 341 static void
 342 dissect_common_header(tvbuff_t *common_header_tvb, packet_info *pinfo, proto_tree *m3ua_tree)
 343 {
 344   guint8  message_class, message_type;
 345
 346   /* Extract the common header */
 347   message_class  = tvb_get_guint8(common_header_tvb, MESSAGE_CLASS_OFFSET);
 348   message_type   = tvb_get_guint8(common_header_tvb, MESSAGE_TYPE_OFFSET);
 349
 350   if (check_col(pinfo->cinfo, COL_INFO))
 351     col_add_fstr(pinfo->cinfo, COL_INFO,"%s ", val_to_str(message_class * 256 + message_type, message_class_type_acro_values, "reserved"));
 352
 353   if (m3ua_tree) {
 354     /* add the components of the common header to the protocol tree */
 355     proto_tree_add_item(m3ua_tree, hf_version, common_header_tvb, VERSION_OFFSET, VERSION_LENGTH, NETWORK_BYTE_ORDER);
 356     proto_tree_add_item(m3ua_tree, hf_reserved, common_header_tvb, RESERVED_OFFSET, RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 357     proto_tree_add_item(m3ua_tree, hf_message_class, common_header_tvb, MESSAGE_CLASS_OFFSET, MESSAGE_CLASS_LENGTH, NETWORK_BYTE_ORDER);
 358     proto_tree_add_uint_format(m3ua_tree, hf_message_type, common_header_tvb, MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type,
 359                                "Message type: %s (%u)", val_to_str(message_class * 256 + message_type, message_class_type_values, "reserved"), message_type);
 360     proto_tree_add_item(m3ua_tree, hf_message_length, common_header_tvb, MESSAGE_LENGTH_OFFSET, MESSAGE_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
 361   }
 362 }
 363
 364 #define NETWORK_APPEARANCE_LENGTH 4
 365 #define NETWORK_APPEARANCE_OFFSET PARAMETER_VALUE_OFFSET
 366
 367 static void
 368 dissect_network_appearance_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 369 {
 370   proto_tree_add_item(parameter_tree, hf_network_appearance, parameter_tvb, NETWORK_APPEARANCE_OFFSET, NETWORK_APPEARANCE_LENGTH, NETWORK_BYTE_ORDER);
 371   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, NETWORK_APPEARANCE_OFFSET));
 372 }
 373
 374 #define V5_PROTOCOL_DATA_OFFSET PARAMETER_VALUE_OFFSET
 375
 376 static void
 377 dissect_v5_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 378 {
 379   guint16 length, protocol_data_length;
 380   tvbuff_t *payload_tvb;
 381
 382   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 383   protocol_data_length = length - PARAMETER_HEADER_LENGTH;
 384   payload_tvb          = tvb_new_subset(parameter_tvb, V5_PROTOCOL_DATA_OFFSET, protocol_data_length, protocol_data_length);
 385   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 386   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 387   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 388 }
 389
 390 #define INFO_STRING_OFFSET PARAMETER_VALUE_OFFSET
 391
 392 static void
 393 dissect_info_string_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 394 {
 395   guint16 info_string_length;
 396
 397   info_string_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 398   proto_tree_add_item(parameter_tree, hf_info_string, parameter_tvb, INFO_STRING_OFFSET, info_string_length, NETWORK_BYTE_ORDER);
 399   proto_item_append_text(parameter_item, " (%.*s)", info_string_length,
 400                          (const char *)tvb_get_ptr(parameter_tvb, INFO_STRING_OFFSET, info_string_length));
 401 }
 402
 403 #define AFFECTED_MASK_LENGTH 1
 404 #define AFFECTED_DPC_LENGTH  3
 405 #define AFFECTED_DESTINATION_LENGTH (AFFECTED_MASK_LENGTH + AFFECTED_DPC_LENGTH)
 406
 407 #define AFFECTED_MASK_OFFSET 0
 408 #define AFFECTED_DPC_OFFSET  1
 409
 410 static void
 411 dissect_affected_destinations_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 412 {
 413   guint16 number_of_destinations, destination_number;
 414   gint destination_offset;
 415
 416   number_of_destinations = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 417   destination_offset = PARAMETER_VALUE_OFFSET;
 418   for(destination_number=1; destination_number <= number_of_destinations; destination_number++) {
 419     proto_tree_add_item(parameter_tree, hf_affected_point_code_mask, parameter_tvb, destination_offset + AFFECTED_MASK_OFFSET, AFFECTED_MASK_LENGTH, NETWORK_BYTE_ORDER);
 420     proto_tree_add_item(parameter_tree, hf_affected_point_code_pc,   parameter_tvb, destination_offset + AFFECTED_DPC_OFFSET,  AFFECTED_DPC_LENGTH,  NETWORK_BYTE_ORDER);
 421     destination_offset += AFFECTED_DESTINATION_LENGTH;
 422   }
 423   proto_item_append_text(parameter_item, " (%u destination%s)", number_of_destinations, plurality(number_of_destinations, "", "s"));
 424 }
 425
 426 #define ROUTING_CONTEXT_LENGTH 4
 427
 428 static void
 429 dissect_routing_context_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 430 {
 431   guint16 number_of_contexts, context_number;
 432   gint context_offset;
 433
 434   number_of_contexts = (tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH) >> 2;
 435   context_offset = PARAMETER_VALUE_OFFSET;
 436   for(context_number=1; context_number <= number_of_contexts; context_number++) {
 437     proto_tree_add_item(parameter_tree, hf_routing_context, parameter_tvb, context_offset, ROUTING_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 438     context_offset += ROUTING_CONTEXT_LENGTH;
 439   };
 440   proto_item_append_text(parameter_item, " (%u context%s)", number_of_contexts, plurality(number_of_contexts, "", "s"));
 441 }
 442
 443 #define DIAGNOSTIC_INFO_OFFSET PARAMETER_VALUE_OFFSET
 444
 445 static void
 446 dissect_diagnostic_information_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 447 {
 448   guint16 diag_info_length;
 449
 450   diag_info_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 451   proto_tree_add_item(parameter_tree, hf_diagnostic_information, parameter_tvb, DIAGNOSTIC_INFO_OFFSET, diag_info_length, NETWORK_BYTE_ORDER);
 452   proto_item_append_text(parameter_item, " (%u byte%s)", diag_info_length, plurality(diag_info_length, "", "s"));
 453 }
 454
 455 #define HEARTBEAT_DATA_OFFSET PARAMETER_VALUE_OFFSET
 456
 457 static void
 458 dissect_heartbeat_data_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 459 {
 460   guint16 heartbeat_data_length;
 461
 462   heartbeat_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 463   proto_tree_add_item(parameter_tree, hf_heartbeat_data, parameter_tvb, HEARTBEAT_DATA_OFFSET, heartbeat_data_length, NETWORK_BYTE_ORDER);
 464   proto_item_append_text(parameter_item, " (%u byte%s)", heartbeat_data_length, plurality(heartbeat_data_length, "", "s"));
 465 }
 466
 467 #define UNKNOWN_UNAVAIL_CAUSE                  0
 468 #define UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE   1
 469 #define INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE 2
 470
 471 static const value_string unavailability_cause_values[] = {
 472   { UNKNOWN_UNAVAIL_CAUSE,                  "Unknown"                  },
 473   { UNEQUIPPED_REMOTE_USER_UNAVAIL_CAUSE,   "Unequipped remote user"   },
 474   { INACCESSABLE_REMOTE_USER_UNAVAIL_CAUSE, "Inaccessable remote user" },
 475   {0,                                       NULL } };
 476
 477 #define RESERVED_0_USER_ID                0
 478 #define RESERVED_1_USER_ID                1
 479 #define RESERVED_2_USER_ID                2
 480 #define SCCP_USER_ID                      3
 481 #define TUP_USER_ID                       4
 482 #define ISUP_USER_ID                      5
 483 #define RESERVED_6_USER_ID                6
 484 #define RESERVED_7_USER_ID                7
 485 #define RESERVED_8_USER_ID                8
 486 #define BROADBAND_ISUP_USER_ID            9
 487 #define SATELLITE_ISUP_USER_ID           10
 488 #define RESERVED_11_USER_ID              11
 489 #define AAL_2_SIGNALING_USER_ID          12
 490 #define BICC_USER_ID                     13
 491 #define GATEWAY_CONTROL_PROTOCOL_USER_ID 14
 492 #define RESERVED_15_USER_ID              15
 493
 494 static const value_string user_identity_values[] = {
 495   { RESERVED_0_USER_ID,     "Reserved"       },
 496   { RESERVED_1_USER_ID,     "Reserved"       },
 497   { RESERVED_2_USER_ID,     "Reserved"       },
 498   { SCCP_USER_ID,           "SCCP"           },
 499   { TUP_USER_ID,            "TUP"            },
 500   { ISUP_USER_ID,           "ISUP"           },
 501   { RESERVED_6_USER_ID,     "Reserved"       },
 502   { RESERVED_7_USER_ID,     "Reserved"       },
 503   { RESERVED_8_USER_ID,     "Reserved"       },
 504   { BROADBAND_ISUP_USER_ID, "Broadband ISUP" },
 505   { SATELLITE_ISUP_USER_ID, "Satellite ISUP" },
 506   { RESERVED_11_USER_ID,    "Reserved"       },
 507   { AAL_2_SIGNALING_USER_ID,"AAL type2 Signaling"},
 508   { BICC_USER_ID,           "Bearer Independent Call Control (BICC)"},
 509   { GATEWAY_CONTROL_PROTOCOL_USER_ID, "Gateway Control Protocol"},
 510   { RESERVED_15_USER_ID,    "Reserved"       },
 511
 512   {0,                       NULL             } };
 513
 514 #define CAUSE_LENGTH 2
 515 #define USER_LENGTH  2
 516
 517 #define CAUSE_OFFSET  PARAMETER_VALUE_OFFSET
 518 #define USER_OFFSET   (CAUSE_OFFSET + CAUSE_LENGTH)
 519
 520 static void
 521 dissect_user_cause_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 522 {
 523   proto_tree_add_item(parameter_tree, hf_cause, parameter_tvb, CAUSE_OFFSET, CAUSE_LENGTH, NETWORK_BYTE_ORDER);
 524   proto_tree_add_item(parameter_tree, hf_user,  parameter_tvb, USER_OFFSET,  USER_LENGTH,  NETWORK_BYTE_ORDER);
 525   proto_item_append_text(parameter_item, " (%s: %s)",
 526                          val_to_str(tvb_get_ntohs(parameter_tvb, USER_OFFSET),  user_identity_values,        "Unknown user"),
 527                          val_to_str(tvb_get_ntohs(parameter_tvb, CAUSE_OFFSET), unavailability_cause_values, "unknown cause"));
 528 }
 529
 530 #define UNSPECIFIED_REASON          0
 531 #define USER_UNAVAILABLE_REASON     1
 532 #define MANAGEMENT_BLOCKING_REASON  2
 533
 534 static const value_string reason_values[] = {
 535   { UNSPECIFIED_REASON,         "Unspecified" },
 536   { USER_UNAVAILABLE_REASON,    "User unavailable" },
 537   { MANAGEMENT_BLOCKING_REASON, "Management blocking" },
 538   {0,                           NULL } };
 539
 540 #define REASON_LENGTH 4
 541 #define REASON_OFFSET PARAMETER_VALUE_OFFSET
 542
 543 static void
 544 dissect_reason_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 545 {
 546   proto_tree_add_item(parameter_tree, hf_reason, parameter_tvb, REASON_OFFSET, REASON_LENGTH, NETWORK_BYTE_ORDER);
 547   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REASON_OFFSET), reason_values, "unknown"));
 548 }
 549
 550 #define TRAFFIC_MODE_TYPE_LENGTH 4
 551 #define TRAFFIC_MODE_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 552
 553 static const value_string v5_traffic_mode_type_values[] = {
 554   { 1, "Over-ride"            },
 555   { 2, "Load-share"           },
 556   { 3, "Over-ride (standby)"  },
 557   { 4, "Load-share (standby)" },
 558   { 0, NULL                   } };
 559
 560 static void
 561 dissect_v5_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 562 {
 563   proto_tree_add_item(parameter_tree, hf_v5_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 564   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"));
 565 }
 566
 567 static const value_string v6_traffic_mode_type_values[] = {
 568   { 1, "Over-ride"            },
 569   { 2, "Load-share"           },
 570   { 3, "Over-ride (standby)"  },
 571   { 4, "Load-share (standby)" },
 572   { 0, NULL                   } };
 573
 574 static void
 575 dissect_v6_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 576 {
 577   proto_tree_add_item(parameter_tree, hf_v6_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 578   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"));
 579 }
 580
 581 static const value_string v7_traffic_mode_type_values[] = {
 582   { 1, "Over-ride"            },
 583   { 2, "Load-share"           },
 584   { 0, NULL                   } };
 585
 586 static void
 587 dissect_v7_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 588 {
 589   proto_tree_add_item(parameter_tree, hf_v7_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 590   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), v7_traffic_mode_type_values, "unknown"));
 591 }
 592
 593 static const value_string traffic_mode_type_values[] = {
 594   { 1, "Over-ride"  },
 595   { 2, "Load-share" },
 596   { 3, "Broadcast"  },
 597   { 0, NULL         } };
 598
 599 static void
 600 dissect_traffic_mode_type_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 601 {
 602   proto_tree_add_item(parameter_tree, hf_traffic_mode_type, parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET, TRAFFIC_MODE_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 603   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, TRAFFIC_MODE_TYPE_OFFSET), traffic_mode_type_values, "unknown"));
 604 }
 605
 606 #define ERROR_CODE_LENGTH 4
 607 #define ERROR_CODE_OFFSET PARAMETER_VALUE_OFFSET
 608
 609 static const value_string v5_error_code_values[] = {
 610   {  1, "Invalid version"               },
 611   {  2, "Invalid network appearance"    },
 612   {  3, "Unsupported message class"     },
 613   {  4, "Unsupported message type"      },
 614   {  5, "Invalid traffic handling mode" },
 615   {  6, "Unexpected message"            },
 616   {  7, "Protocol error"                },
 617   {  8, "Invalid routing context"       },
 618   {  0,  NULL                           } };
 619
 620 static void
 621 dissect_v5_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 622 {
 623   proto_tree_add_item(parameter_tree, hf_v5_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), v5_error_code_values, "unknown"));
 625 }
 626
 627 static const value_string v6_error_code_values[] = {
 628   {  1, "Invalid version"               },
 629   {  2, "Invalid network appearance"    },
 630   {  3, "Unsupported message class"     },
 631   {  4, "Unsupported message type"      },
 632   {  5, "Invalid traffic handling mode" },
 633   {  6, "Unexpected message"            },
 634   {  7, "Protocol error"                },
 635   {  8, "Invalid routing context"       },
 636   {  9, "Invalid stream identifier"     },
 637   { 10, "Invalid parameter value"       },
 638   {  0,  NULL                           } };
 639
 640
 641 static void
 642 dissect_v6_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 643 {
 644   proto_tree_add_item(parameter_tree, hf_v6_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 645   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v6_error_code_values, "unknown"));
 646 }
 647
 648 static const value_string v7_error_code_values[] = {
 649   {  1, "Invalid version"               },
 650   {  2, "Invalid network appearance"    },
 651   {  3, "Unsupported message class"     },
 652   {  4, "Unsupported message type"      },
 653   {  5, "Invalid traffic handling mode" },
 654   {  6, "Unexpected message"            },
 655   {  7, "Protocol error"                },
 656   {  8, "Invalid routing context"       },
 657   {  9, "Invalid stream identifier"     },
 658   { 10, "Invalid parameter value"       },
 659   { 11, "Refused - Management Blocking" },
 660   { 12, "Unknown Routing Context"       },
 661   {  0,  NULL                           } };
 662
 663
 664 static void
 665 dissect_v7_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 666 {
 667   proto_tree_add_item(parameter_tree, hf_v7_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 668   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), v7_error_code_values, "unknown"));
 669 }
 670
 671 static const value_string error_code_values[] = {
 672   { 0x01, "Invalid version"                   },
 673   { 0x03, "Unsupported message class"         },
 674   { 0x04, "Unsupported message type"          },
 675   { 0x05, "Unsupported traffic handling mode" },
 676   { 0x06, "Unexpected message"                },
 677   { 0x07, "Protocol error"                    },
 678   { 0x09, "Invalid stream identifier"         },
 679   { 0x0d, "Refused - management blocking"     },
 680   { 0x0e, "ASP identifier required"           },
 681   { 0x0f, "Invalid ASP identifier"            },
 682   { 0x11, "Invalid parameter value"           },
 683   { 0x12, "Parameter field error"             },
 684   { 0x13, "Unexpected parameter"              },
 685   { 0x14, "Destination status unknown"        },
 686   { 0x15, "Invalid network appearance"        },
 687   { 0x16, "Missing parameter"                 },
 688   { 0x19, "Invalid routing context"           },
 689   { 0x1a, "No configured AS for ASP"          },
 690   { 0,    NULL                                } };
 691
 692 static void
 693 dissect_error_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 694 {
 695   proto_tree_add_item(parameter_tree, hf_error_code, parameter_tvb, ERROR_CODE_OFFSET, ERROR_CODE_LENGTH, NETWORK_BYTE_ORDER);
 696   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, ERROR_CODE_OFFSET), error_code_values, "unknown"));
 697 }
 698
 699 #define AS_STATE_CHANGE_TYPE       1
 700 #define OTHER_TYPE                 2
 701
 702 static const value_string status_type_values[] = {
 703   { AS_STATE_CHANGE_TYPE,            "Application server state change" },
 704   { OTHER_TYPE,                      "Other" },
 705   { 0,                           NULL } };
 706
 707 #define RESERVED_INFO              1
 708 #define AS_INACTIVE_INFO           2
 709 #define AS_ACTIVE_INFO             3
 710 #define AS_PENDING_INFO            4
 711
 712 #define INSUFFICIENT_ASP_RES_INFO  1
 713 #define ALTERNATE_ASP_ACTIVE_INFO  2
 714 #define ASP_FAILURE_INFO           3
 715
 716 static const value_string v567_status_type_info_values[] = {
 717   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 718   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 719   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 720   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 721   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 722   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 723   {0,                           NULL } };
 724
 725
 726 #define STATUS_TYPE_LENGTH 2
 727 #define STATUS_INFO_LENGTH 2
 728
 729 #define STATUS_TYPE_OFFSET PARAMETER_VALUE_OFFSET
 730 #define STATUS_INFO_OFFSET (STATUS_TYPE_OFFSET + STATUS_TYPE_LENGTH)
 731
 732 static void
 733 dissect_v567_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 734 {
 735   guint16 status_type, status_info;
 736
 737   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 738   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 739
 740   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 741   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 742                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, v567_status_type_info_values, "unknown"), status_info);
 743
 744   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, v567_status_type_info_values, "unknown status information"));
 745 }
 746
 747 static const value_string status_type_info_values[] = {
 748   { AS_STATE_CHANGE_TYPE * 256 * 256 + RESERVED_INFO,             "Reserved" },
 749   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_INACTIVE_INFO,          "Application server inactive" },
 750   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_ACTIVE_INFO,            "Application server active" },
 751   { AS_STATE_CHANGE_TYPE * 256 * 256 + AS_PENDING_INFO,           "Application server pending" },
 752   { OTHER_TYPE           * 256 * 256 + INSUFFICIENT_ASP_RES_INFO, "Insufficient ASP resources active in AS" },
 753   { OTHER_TYPE           * 256 * 256 + ALTERNATE_ASP_ACTIVE_INFO, "Alternate ASP active" },
 754   { OTHER_TYPE           * 256 * 256 + ASP_FAILURE_INFO,          "ASP Failure" },
 755   {0,                           NULL } };
 756
 757 static void
 758 dissect_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 759 {
 760   guint16 status_type, status_info;
 761
 762   status_type = tvb_get_ntohs(parameter_tvb, STATUS_TYPE_OFFSET);
 763   status_info = tvb_get_ntohs(parameter_tvb, STATUS_INFO_OFFSET);
 764
 765   proto_tree_add_item(parameter_tree, hf_status_type, parameter_tvb, STATUS_TYPE_OFFSET, STATUS_TYPE_LENGTH, NETWORK_BYTE_ORDER);
 766   proto_tree_add_uint_format(parameter_tree, hf_status_info, parameter_tvb, STATUS_INFO_OFFSET, STATUS_INFO_LENGTH, status_info,
 767                              "Status info: %s (%u)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown"), status_info);
 768
 769   proto_item_append_text(parameter_item, " (%s)", val_to_str(status_type * 256 * 256 + status_info, status_type_info_values, "unknown status information"));
 770 }
 771
 772 static const value_string congestion_level_values[] = {
 773   { 0, "No congestion or undefined" },
 774   { 1, "Congestion level 1"         },
 775   { 2, "Congestion level 2"         },
 776   { 3, "Congestion level 3"         },
 777   { 0, NULL                         } };
 778
 779 #define CONG_IND_RESERVED_LENGTH    3
 780 #define CONG_IND_LEVEL_LENGTH       1
 781
 782 #define CONG_IND_RESERVED_OFFSET     PARAMETER_VALUE_OFFSET
 783 #define CONG_IND_LEVEL_OFFSET        (CONG_IND_RESERVED_OFFSET + CONG_IND_RESERVED_LENGTH)
 784
 785 static void
 786 dissect_congestion_indication_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 787 {
 788   proto_tree_add_item(parameter_tree, hf_congestion_reserved, parameter_tvb, CONG_IND_RESERVED_OFFSET, CONG_IND_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 789   proto_tree_add_item(parameter_tree, hf_congestion_level,    parameter_tvb, CONG_IND_LEVEL_OFFSET,    CONG_IND_LEVEL_LENGTH,    NETWORK_BYTE_ORDER);
 790   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_guint8(parameter_tvb, CONG_IND_LEVEL_OFFSET), congestion_level_values, "unknown"));
 791 }
 792
 793 #define ASP_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 794 #define ASP_IDENTIFIER_LENGTH  4
 795
 796 static void
 797 dissect_asp_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 798 {
 799   proto_tree_add_item(parameter_tree, hf_asp_identifier, parameter_tvb, ASP_IDENTIFIER_OFFSET, ASP_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 800   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, ASP_IDENTIFIER_OFFSET));
 801 }
 802
 803 #define PROTOCOL_DATA_1_OFFSET PARAMETER_VALUE_OFFSET
 804
 805 static void
 806 dissect_protocol_data_1_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_item *parameter_item)
 807 {
 808   guint16 protocol_data_length;
 809   tvbuff_t *payload_tvb;
 810
 811   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
 812   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_1_OFFSET, protocol_data_length, protocol_data_length);
 813   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 814   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH);
 815   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 816 }
 817
 818 #define LI_OCTETT_LENGTH 1
 819 #define LI_OCTETT_OFFSET PARAMETER_VALUE_OFFSET
 820 #define PROTOCOL_DATA_2_OFFSET (PARAMETER_VALUE_OFFSET + LI_OCTETT_LENGTH)
 821
 822 static void
 823 dissect_protocol_data_2_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
 824 {
 825   guint8 li;
 826   guint16 protocol_data_length;
 827   tvbuff_t *payload_tvb;
 828
 829   li                   = tvb_get_guint8(parameter_tvb, LI_OCTETT_OFFSET);
 830   protocol_data_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - LI_OCTETT_LENGTH;
 831   payload_tvb          = tvb_new_subset(parameter_tvb, PROTOCOL_DATA_2_OFFSET, protocol_data_length, protocol_data_length);
 832   proto_tree_add_item(parameter_tree, hf_li, parameter_tvb, LI_OCTETT_OFFSET, LI_OCTETT_LENGTH, NETWORK_BYTE_ORDER);
 833   proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", protocol_data_length, plurality(protocol_data_length, "", "s"));
 834   proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + LI_OCTETT_LENGTH);
 835   call_dissector(mtp3_handle, payload_tvb, pinfo, tree);
 836 }
 837
 838
 839
 840 #define CON_DEST_RESERVED_LENGTH    1
 841 #define CON_DEST_PC_LENGTH          3
 842
 843 #define CON_DEST_RESERVED_OFFSET    PARAMETER_VALUE_OFFSET
 844 #define CON_DEST_PC_OFFSET          (CON_DEST_RESERVED_OFFSET + CON_DEST_RESERVED_LENGTH)
 845
 846 static void
 847 dissect_concerned_destination_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 848 {
 849   proto_tree_add_item(parameter_tree, hf_concerned_dest_reserved, parameter_tvb, CON_DEST_RESERVED_OFFSET, CON_DEST_RESERVED_LENGTH, NETWORK_BYTE_ORDER);
 850   proto_tree_add_item(parameter_tree, hf_concerned_dest_pc,       parameter_tvb, CON_DEST_PC_OFFSET,       CON_DEST_PC_LENGTH,       NETWORK_BYTE_ORDER);
 851   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, CON_DEST_PC_OFFSET));
 852 }
 853
 854 static void
 855 dissect_routing_key_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 856 {
 857   tvbuff_t *parameters_tvb;
 858   guint16 length, parameters_length;
 859
 860   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 861   parameters_length = length - PARAMETER_HEADER_LENGTH;
 862   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 863   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 864 }
 865
 866 static const value_string registration_result_status_values[] = {
 867   { 0, "Successfully Registered" } ,
 868   { 1, "Error - Unknown" } ,
 869   { 2, "Error - Invalid DPC" } ,
 870   { 3, "Error - Invalid Network Appearance" } ,
 871   { 4, "Error - Invalid Routing Key" } ,
 872   { 5, "Error - Permission Denied" } ,
 873   { 6, "Error - Overlapping (Non-unique) Routing Key" } ,
 874   { 7, "Error - Routing Key not Provisioned" } ,
 875   { 8, "Error - Insufficient Resources" } ,
 876   { 0, NULL } };
 877
 878 #define REG_RES_IDENTIFIER_LENGTH 4
 879 #define REG_RES_STATUS_LENGTH     4
 880 #define REG_RES_CONTEXT_LENGTH    4
 881
 882 #define REG_RES_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 883 #define REG_RES_STATUS_OFFSET     (REG_RES_IDENTIFIER_OFFSET + REG_RES_IDENTIFIER_LENGTH)
 884 #define REG_RES_CONTEXT_OFFSET    (REG_RES_STATUS_OFFSET + REG_RES_STATUS_LENGTH)
 885
 886 static void
 887 dissect_v67_registration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 888 {
 889   proto_tree_add_item(parameter_tree, hf_registration_result_identifier, parameter_tvb, REG_RES_IDENTIFIER_OFFSET, REG_RES_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 890   proto_tree_add_item(parameter_tree, hf_registration_result_status,     parameter_tvb, REG_RES_STATUS_OFFSET,     REG_RES_STATUS_LENGTH,     NETWORK_BYTE_ORDER);
 891   proto_tree_add_item(parameter_tree, hf_registration_result_context,    parameter_tvb, REG_RES_CONTEXT_OFFSET,    REG_RES_CONTEXT_LENGTH,    NETWORK_BYTE_ORDER);
 892 }
 893
 894 static void
 895 dissect_registration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 896 {
 897   tvbuff_t *parameters_tvb;
 898   guint16 length, parameters_length;
 899
 900   length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 901   parameters_length = length - PARAMETER_HEADER_LENGTH;
 902   parameters_tvb          = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 903   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 904 }
 905
 906 static const value_string v6_deregistration_result_status_values[] = {
 907   { 0, "Successfully De-registered" } ,
 908   { 1, "Error - Unknown" } ,
 909   { 2, "Error - Invalid Routing context" } ,
 910   { 3, "Error - Permission Denied" } ,
 911   { 4, "Error - Not registered" } ,
 912   { 0, NULL } };
 913
 914 #define DEREG_RES_CONTEXT_LENGTH 4
 915 #define DEREG_RES_STATUS_LENGTH  4
 916
 917 #define DEREG_RES_CONTEXT_OFFSET PARAMETER_VALUE_OFFSET
 918 #define DEREG_RES_STATUS_OFFSET  (DEREG_RES_CONTEXT_OFFSET + DEREG_RES_CONTEXT_LENGTH)
 919
 920 static void
 921 dissect_v67_deregistration_result_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree)
 922 {
 923   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_context, parameter_tvb, DEREG_RES_CONTEXT_OFFSET, DEREG_RES_CONTEXT_LENGTH, NETWORK_BYTE_ORDER);
 924   proto_tree_add_item(parameter_tree, hf_v6_deregistration_result_status,  parameter_tvb, DEREG_RES_STATUS_OFFSET,  DEREG_RES_STATUS_LENGTH,  NETWORK_BYTE_ORDER);
 925 }
 926
 927 static void
 928 dissect_deregistration_result_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
 929 {
 930   tvbuff_t *parameters_tvb;
 931   guint16 length, parameters_length;
 932
 933   length            = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 934   parameters_length = length - PARAMETER_HEADER_LENGTH;
 935   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
 936   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
 937 }
 938
 939
 940 #define LOCAL_RK_IDENTIFIER_OFFSET PARAMETER_VALUE_OFFSET
 941 #define LOCAL_RK_IDENTIFIER_LENGTH 4
 942
 943 static void
 944 dissect_local_routing_key_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 945 {
 946   guint32 id;
 947
 948   id = tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET);
 949   proto_tree_add_item(parameter_tree, hf_local_rk_identifier, parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET, LOCAL_RK_IDENTIFIER_LENGTH, NETWORK_BYTE_ORDER);
 950   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, LOCAL_RK_IDENTIFIER_OFFSET));
 951 }
 952
 953 #define DPC_MASK_LENGTH    1
 954 #define DPC_PC_LENGTH      3
 955
 956 #define DPC_MASK_OFFSET    PARAMETER_VALUE_OFFSET
 957 #define DPC_PC_OFFSET      (DPC_MASK_OFFSET + DPC_MASK_LENGTH)
 958
 959 static void
 960 dissect_destination_point_code_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 961 {
 962   proto_tree_add_item(parameter_tree, hf_dpc_mask, parameter_tvb, DPC_MASK_OFFSET, DPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
 963   proto_tree_add_item(parameter_tree, hf_dpc_pc,   parameter_tvb, DPC_PC_OFFSET,   DPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
 964   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntoh24(parameter_tvb, DPC_PC_OFFSET));
 965 }
 966
 967 #define SI_LENGTH 1
 968
 969 static void
 970 dissect_service_indicators_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 971 {
 972   guint16 length, number_of_sis, si_number;
 973   gint si_offset;
 974
 975   length        = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 976   number_of_sis = length - PARAMETER_HEADER_LENGTH;
 977
 978   si_offset = PARAMETER_VALUE_OFFSET;
 979   for(si_number=1; si_number <= number_of_sis; si_number++) {
 980     proto_tree_add_item(parameter_tree, hf_si, parameter_tvb, si_offset, SI_LENGTH, NETWORK_BYTE_ORDER);
 981     si_offset += SI_LENGTH;
 982   };
 983   proto_item_append_text(parameter_item, " (%u indicator%s)", number_of_sis, plurality(number_of_sis, "", "s"));
 984
 985 }
 986 #define SSN_LENGTH 1
 987
 988 static void
 989 dissect_subsystem_numbers_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
 990 {
 991   guint16 length, number_of_ssns, ssn_number;
 992   gint ssn_offset;
 993
 994   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
 995   number_of_ssns = length - PARAMETER_HEADER_LENGTH;
 996
 997   ssn_offset = PARAMETER_VALUE_OFFSET;
 998   for(ssn_number=1; ssn_number <= number_of_ssns; ssn_number++) {
 999     proto_tree_add_item(parameter_tree, hf_ssn, parameter_tvb, ssn_offset, SSN_LENGTH, NETWORK_BYTE_ORDER);
1000     ssn_offset += SSN_LENGTH;
1001   };
1002   proto_item_append_text(parameter_item, " (%u number%s)", number_of_ssns, plurality(number_of_ssns, "", "s"));
1003
1004 }
1005
1006 #define OPC_MASK_LENGTH             1
1007 #define OPC_PC_LENGTH               3
1008 #define OPC_LENGTH                  (OPC_MASK_LENGTH + OPC_PC_LENGTH)
1009 #define OPC_MASK_OFFSET             0
1010 #define OPC_PC_OFFSET               (OPC_MASK_OFFSET + OPC_MASK_LENGTH)
1011
1012 static void
1013 dissect_originating_point_code_list_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1014 {
1015   guint16 length, number_of_point_codes, point_code_number;
1016   gint point_code_offset;
1017
1018   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1019   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / 4;
1020
1021   point_code_offset = PARAMETER_VALUE_OFFSET;
1022   for(point_code_number=1; point_code_number <= number_of_point_codes; point_code_number++) {
1023     proto_tree_add_item(parameter_tree, hf_opc_list_mask, parameter_tvb, point_code_offset + OPC_MASK_OFFSET, OPC_MASK_LENGTH, NETWORK_BYTE_ORDER);
1024     proto_tree_add_item(parameter_tree, hf_opc_list_pc,   parameter_tvb, point_code_offset + OPC_PC_OFFSET,   OPC_PC_LENGTH,   NETWORK_BYTE_ORDER);
1025     point_code_offset += OPC_LENGTH;
1026   };
1027   proto_item_append_text(parameter_item, " (%u point code%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
1028 }
1029
1030 #define CIC_RANGE_MASK_LENGTH             1
1031 #define CIC_RANGE_PC_LENGTH               3
1032 #define CIC_RANGE_LOWER_LENGTH            2
1033 #define CIC_RANGE_UPPER_LENGTH            2
1034 #define CIC_RANGE_LENGTH                  (CIC_RANGE_MASK_LENGTH + CIC_RANGE_PC_LENGTH + CIC_RANGE_LOWER_LENGTH + CIC_RANGE_UPPER_LENGTH)
1035 #define CIC_RANGE_MASK_OFFSET             0
1036 #define CIC_RANGE_PC_OFFSET               (CIC_RANGE_MASK_OFFSET + CIC_RANGE_MASK_LENGTH)
1037 #define CIC_RANGE_LOWER_OFFSET            (CIC_RANGE_PC_OFFSET + CIC_RANGE_PC_LENGTH)
1038 #define CIC_RANGE_UPPER_OFFSET            (CIC_RANGE_LOWER_OFFSET + CIC_RANGE_LOWER_LENGTH)
1039
1040 static void
1041 dissect_circuit_range_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1042 {
1043   guint16 length, number_of_point_codes, point_code_number;
1044   gint point_code_offset;
1045
1046   length                = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1047   number_of_point_codes = (length - PARAMETER_HEADER_LENGTH) / CIC_RANGE_LENGTH;
1048
1049   point_code_offset = PARAMETER_VALUE_OFFSET;
1050   for(point_code_number = 1; point_code_number <= number_of_point_codes; point_code_number++) {
1051     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);
1052     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);
1053     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);
1054     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);
1055     point_code_offset += CIC_RANGE_LENGTH;
1056   };
1057   proto_item_append_text(parameter_item, " (%u range%s)", number_of_point_codes, plurality(number_of_point_codes, "", "s"));
1058 }
1059
1060 #define DATA_OPC_LENGTH   4
1061 #define DATA_DPC_LENGTH   4
1062 #define DATA_SI_LENGTH    1
1063 #define DATA_NI_LENGTH    1
1064 #define DATA_MP_LENGTH    1
1065 #define DATA_SLS_LENGTH   1
1066 #define DATA_HDR_LENGTH   (DATA_OPC_LENGTH + DATA_DPC_LENGTH + DATA_SI_LENGTH + DATA_NI_LENGTH + DATA_MP_LENGTH + DATA_SLS_LENGTH)
1067
1068 #define DATA_OPC_OFFSET   PARAMETER_VALUE_OFFSET
1069 #define DATA_DPC_OFFSET   (DATA_OPC_OFFSET + DATA_OPC_LENGTH)
1070 #define DATA_SI_OFFSET    (DATA_DPC_OFFSET + DATA_DPC_LENGTH)
1071 #define DATA_NI_OFFSET    (DATA_SI_OFFSET  + DATA_SI_LENGTH)
1072 #define DATA_MP_OFFSET    (DATA_NI_OFFSET  + DATA_NI_LENGTH)
1073 #define DATA_SLS_OFFSET   (DATA_MP_OFFSET  + DATA_MP_LENGTH)
1074 #define DATA_ULP_OFFSET   (DATA_SLS_OFFSET + DATA_SLS_LENGTH)
1075
1076 static void
1077 dissect_protocol_data_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree, proto_item *parameter_item)
1078 {
1079   guint16 ulp_length;
1080   tvbuff_t *payload_tvb;
1081
1082   ulp_length  = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH - DATA_HDR_LENGTH;
1083
1084   if (parameter_tree) {
1085     proto_tree_add_item(parameter_tree, hf_protocol_data_opc, parameter_tvb, DATA_OPC_OFFSET, DATA_OPC_LENGTH, NETWORK_BYTE_ORDER);
1086     proto_tree_add_item(parameter_tree, hf_protocol_data_dpc, parameter_tvb, DATA_DPC_OFFSET, DATA_DPC_LENGTH, NETWORK_BYTE_ORDER);
1087     proto_tree_add_item(parameter_tree, hf_protocol_data_si,  parameter_tvb, DATA_SI_OFFSET,  DATA_SI_LENGTH,  NETWORK_BYTE_ORDER);
1088     proto_tree_add_item(parameter_tree, hf_protocol_data_ni,  parameter_tvb, DATA_NI_OFFSET,  DATA_NI_LENGTH,  NETWORK_BYTE_ORDER);
1089     proto_tree_add_item(parameter_tree, hf_protocol_data_mp,  parameter_tvb, DATA_MP_OFFSET,  DATA_MP_LENGTH,  NETWORK_BYTE_ORDER);
1090     proto_tree_add_item(parameter_tree, hf_protocol_data_sls, parameter_tvb, DATA_SLS_OFFSET, DATA_SLS_LENGTH, NETWORK_BYTE_ORDER);
1091
1092     proto_item_append_text(parameter_item, " (SS7 message of %u byte%s)", ulp_length, plurality(ulp_length, "", "s"));
1093     proto_item_set_len(parameter_item, PARAMETER_HEADER_LENGTH + DATA_HDR_LENGTH);
1094   }
1095
1096   payload_tvb = tvb_new_subset(parameter_tvb, DATA_ULP_OFFSET, ulp_length, ulp_length);
1097   if (!dissector_try_port(si_dissector_table, tvb_get_guint8(parameter_tvb, DATA_SI_OFFSET), payload_tvb, pinfo, tree))
1098     call_dissector(data_handle, payload_tvb, pinfo, tree);
1099 }
1100
1101 #define CORR_ID_OFFSET PARAMETER_VALUE_OFFSET
1102 #define CORR_ID_LENGTH 4
1103
1104 static void
1105 dissect_correlation_identifier_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1106 {
1107   proto_tree_add_item(parameter_tree, hf_correlation_identifier, parameter_tvb, CORR_ID_OFFSET, CORR_ID_LENGTH, NETWORK_BYTE_ORDER);
1108   proto_item_append_text(parameter_item, " (%u)", tvb_get_ntohl(parameter_tvb, CORR_ID_OFFSET));
1109 }
1110
1111 #define REG_STATUS_LENGTH  4
1112 #define REG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1113
1114 static const value_string registration_status_values[] = {
1115   {  0, "Successfully Registered" },
1116   {  1, "Error - Unknown" },
1117   {  2, "Error - Invalid DPC" },
1118   {  3, "Error - Invalid Network Appearance" },
1119   {  4, "Error - Invalid Routing Key" },
1120   {  5, "Error - Permission Denied" },
1121   {  6, "Error - Cannot Support Unique Routing" },
1122   {  7, "Error - Routing Key not Currently Provisioned" },
1123   {  8, "Error - Insufficient Resources" },
1124   {  9, "Error - Unsupported RK parameter Field" },
1125   { 10, "Error - Unsupported/Invalid Traffic Handling Mode" },
1126   {  0, NULL } };
1127
1128 static void
1129 dissect_registration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1130 {
1131   proto_tree_add_item(parameter_tree, hf_registration_status, parameter_tvb, REG_STATUS_OFFSET, REG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1132   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, REG_STATUS_OFFSET), registration_status_values, "unknown"));
1133 }
1134
1135 #define DEREG_STATUS_LENGTH  4
1136 #define DEREG_STATUS_OFFSET  PARAMETER_VALUE_OFFSET
1137
1138 static const value_string deregistration_status_values[] = {
1139   { 0, "Successfully Deregistered" },
1140   { 1, "Error - Unknown" },
1141   { 2, "Error - Invalid Routing Context" },
1142   { 3, "Error - Permission Denied" },
1143   { 4, "Error - Not Registered" },
1144   { 5, "Error - ASP Currently Active for Routing Context" },
1145   { 0, NULL } };
1146
1147 static void
1148 dissect_deregistration_status_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1149 {
1150   proto_tree_add_item(parameter_tree, hf_deregistration_status, parameter_tvb, DEREG_STATUS_OFFSET, DEREG_STATUS_LENGTH, NETWORK_BYTE_ORDER);
1151   proto_item_append_text(parameter_item, " (%s)", val_to_str(tvb_get_ntohl(parameter_tvb, DEREG_STATUS_OFFSET), deregistration_status_values, "unknown"));
1152 }
1153
1154 static void
1155 dissect_registration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1156 {
1157   tvbuff_t *parameters_tvb;
1158   guint16 parameters_length;
1159
1160   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1161   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1162   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1163 }
1164
1165 static void
1166 dissect_deregistration_results_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *parameter_tree)
1167 {
1168   tvbuff_t *parameters_tvb;
1169   guint16 parameters_length;
1170
1171   parameters_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1172   parameters_tvb    = tvb_new_subset(parameter_tvb, PARAMETER_VALUE_OFFSET, parameters_length, parameters_length);
1173   dissect_parameters(parameters_tvb, pinfo, tree, parameter_tree);
1174 }
1175
1176 static void
1177 dissect_unknown_parameter(tvbuff_t *parameter_tvb, proto_tree *parameter_tree, proto_item *parameter_item)
1178 {
1179   guint16 tag, parameter_value_length;
1180
1181   tag                    = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1182   parameter_value_length = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET) - PARAMETER_HEADER_LENGTH;
1183   proto_tree_add_item(parameter_tree, hf_parameter_value, parameter_tvb, PARAMETER_VALUE_OFFSET, parameter_value_length, NETWORK_BYTE_ORDER);
1184   proto_item_append_text(parameter_item, " (tag %u and %u byte%s value)", tag, parameter_value_length, plurality(parameter_value_length, "", "s"));
1185 }
1186
1187 #define V5_NETWORK_APPEARANCE_PARAMETER_TAG       1
1188 #define V5_PROTOCOL_DATA_PARAMETER_TAG            3
1189 #define V5_INFO_PARAMETER_TAG                     4
1190 #define V5_AFFECTED_DESTINATIONS_PARAMETER_TAG    5
1191 #define V5_ROUTING_CONTEXT_PARAMETER_TAG          6
1192 #define V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG   7
1193 #define V5_HEARTBEAT_DATA_PARAMETER_TAG           8
1194 #define V5_USER_CAUSE_PARAMETER_TAG               9
1195 #define V5_REASON_PARAMETER_TAG                   10
1196 #define V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG        11
1197 #define V5_ERROR_CODE_PARAMETER_TAG               12
1198 #define V5_STATUS_PARAMETER_TAG                   13
1199 #define V5_CONGESTION_INDICATION_PARAMETER_TAG    14
1200
1201 static const value_string v5_parameter_tag_values[] = {
1202   { V5_NETWORK_APPEARANCE_PARAMETER_TAG,     "Network appearance" },
1203   { V5_PROTOCOL_DATA_PARAMETER_TAG,          "Protocol data" },
1204   { V5_INFO_PARAMETER_TAG,                   "Info" },
1205   { V5_AFFECTED_DESTINATIONS_PARAMETER_TAG,  "Affected destinations" },
1206   { V5_ROUTING_CONTEXT_PARAMETER_TAG,        "Routing context" },
1207   { V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG, "Diagnostic information" },
1208   { V5_HEARTBEAT_DATA_PARAMETER_TAG,         "Heartbeat data" },
1209   { V5_USER_CAUSE_PARAMETER_TAG,             "User / Cause" },
1210   { V5_REASON_PARAMETER_TAG,                 "Reason" },
1211   { V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG,      "Traffic mode type" },
1212   { V5_ERROR_CODE_PARAMETER_TAG,             "Error code" },
1213   { V5_STATUS_PARAMETER_TAG,                 "Status" },
1214   { V5_CONGESTION_INDICATION_PARAMETER_TAG,  "Congestion indication" },
1215   { 0,                                       NULL } };
1216
1217 static void
1218 dissect_v5_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1219 {
1220   guint16 tag, length, padding_length;
1221   proto_item *parameter_item;
1222   proto_tree *parameter_tree;
1223
1224   /* extract tag and length from the parameter */
1225   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1226   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1227   padding_length = tvb_length(parameter_tvb) - length;
1228
1229   if (!tree && tag != V5_PROTOCOL_DATA_PARAMETER_TAG)
1230     return;     /* Nothing to do here */
1231
1232   /* create proto_tree stuff */
1233   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"));
1234   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1235
1236   /* add tag and length to the parameter tree */
1237   proto_tree_add_item(parameter_tree, hf_v5_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1238   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1239
1240   switch(tag) {
1241   case V5_NETWORK_APPEARANCE_PARAMETER_TAG:
1242     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1243     break;
1244   case V5_PROTOCOL_DATA_PARAMETER_TAG:
1245     dissect_v5_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_item);
1246     break;
1247   case V5_INFO_PARAMETER_TAG:
1248     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1249     break;
1250   case V5_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1251     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1252     break;
1253   case V5_ROUTING_CONTEXT_PARAMETER_TAG:
1254     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1255     break;
1256   case V5_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1257     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1258     break;
1259   case V5_HEARTBEAT_DATA_PARAMETER_TAG:
1260     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1261     break;
1262   case V5_USER_CAUSE_PARAMETER_TAG:
1263     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1264     break;
1265   case V5_REASON_PARAMETER_TAG:
1266     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1267     break;
1268   case V5_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1269     dissect_v5_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1270     break;
1271   case V5_ERROR_CODE_PARAMETER_TAG:
1272     dissect_v5_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1273     break;
1274   case V5_STATUS_PARAMETER_TAG:
1275     dissect_v567_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1276     break;
1277   case V5_CONGESTION_INDICATION_PARAMETER_TAG:
1278     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1279     break;
1280   default:
1281     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1282     break;
1283   };
1284   if (padding_length > 0)
1285     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1286 }
1287
1288 #define V6_NETWORK_APPEARANCE_PARAMETER_TAG            1
1289 #define V6_PROTOCOL_DATA_1_PARAMETER_TAG               2
1290 #define V6_PROTOCOL_DATA_2_PARAMETER_TAG               3
1291 #define V6_INFO_PARAMETER_TAG                          4
1292 #define V6_AFFECTED_DESTINATIONS_PARAMETER_TAG         5
1293 #define V6_ROUTING_CONTEXT_PARAMETER_TAG               6
1294 #define V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG        7
1295 #define V6_HEARTBEAT_DATA_PARAMETER_TAG                8
1296 #define V6_USER_CAUSE_PARAMETER_TAG                    9
1297 #define V6_REASON_PARAMETER_TAG                       10
1298 #define V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG            11
1299 #define V6_ERROR_CODE_PARAMETER_TAG                   12
1300 #define V6_STATUS_PARAMETER_TAG                       13
1301 #define V6_CONGESTION_INDICATION_PARAMETER_TAG        14
1302 #define V6_CONCERNED_DESTINATION_PARAMETER_TAG        15
1303 #define V6_ROUTING_KEY_PARAMETER_TAG                  16
1304 #define V6_REGISTRATION_RESULT_PARAMETER_TAG          17
1305 #define V6_DEREGISTRATION_RESULT_PARAMETER_TAG        18
1306 #define V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 19
1307 #define V6_DESTINATION_POINT_CODE_PARAMETER_TAG       20
1308 #define V6_SERVICE_INDICATORS_PARAMETER_TAG           21
1309 #define V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG            22
1310 #define V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  23
1311 #define V6_CIRCUIT_RANGE_PARAMETER_TAG                24
1312 #define V6_REGISTRATION_RESULTS_PARAMETER_TAG         25
1313 #define V6_DEREGISTRATION_RESULTS_PARAMETER_TAG       26
1314
1315 static const value_string v6_parameter_tag_values[] = {
1316   { V6_NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" },
1317   { V6_PROTOCOL_DATA_1_PARAMETER_TAG,              "Protocol data 1" },
1318   { V6_PROTOCOL_DATA_2_PARAMETER_TAG,              "Protocol data 2" },
1319   { V6_INFO_PARAMETER_TAG,                         "Info" },
1320   { V6_AFFECTED_DESTINATIONS_PARAMETER_TAG,        "Affected destinations" },
1321   { V6_ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" },
1322   { V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic information" },
1323   { V6_HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" },
1324   { V6_USER_CAUSE_PARAMETER_TAG,                   "User / Cause" },
1325   { V6_REASON_PARAMETER_TAG,                       "Reason" },
1326   { V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" },
1327   { V6_ERROR_CODE_PARAMETER_TAG,                   "Error code" },
1328   { V6_STATUS_PARAMETER_TAG,                       "Status" },
1329   { V6_CONGESTION_INDICATION_PARAMETER_TAG,        "Congestion indication" },
1330   { V6_CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" },
1331   { V6_ROUTING_KEY_PARAMETER_TAG,                  "Routing Key" },
1332   { V6_REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" },
1333   { V6_DEREGISTRATION_RESULT_PARAMETER_TAG,        "De-registration result" },
1334   { V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" },
1335   { V6_DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" },
1336   { V6_SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" },
1337   { V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG,            "Subsystem numbers" },
1338   { V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" },
1339   { V6_CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" },
1340   { V6_REGISTRATION_RESULTS_PARAMETER_TAG,         "Registration results" },
1341   { V6_DEREGISTRATION_RESULTS_PARAMETER_TAG,       "De-registration results" },
1342   { 0,                           NULL } };
1343
1344 static void
1345 dissect_v6_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1346 {
1347   guint16 tag, length, padding_length;
1348   proto_item *parameter_item;
1349   proto_tree *parameter_tree;
1350
1351   /* extract tag and length from the parameter */
1352   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1353   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1354   padding_length = tvb_length(parameter_tvb) - length;
1355
1356   if (!tree && tag != V6_PROTOCOL_DATA_1_PARAMETER_TAG && tag != V6_PROTOCOL_DATA_2_PARAMETER_TAG)
1357     return;     /* Nothing to do here */
1358
1359   /* create proto_tree stuff */
1360   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"));
1361   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1362
1363   /* add tag and length to the parameter tree */
1364   proto_tree_add_item(parameter_tree, hf_v6_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1365   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1366
1367   switch(tag) {
1368   case V6_NETWORK_APPEARANCE_PARAMETER_TAG:
1369     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1370     break;
1371   case V6_PROTOCOL_DATA_1_PARAMETER_TAG:
1372     dissect_protocol_data_1_parameter(parameter_tvb, pinfo, tree, parameter_item);
1373     break;
1374   case V6_PROTOCOL_DATA_2_PARAMETER_TAG:
1375     dissect_protocol_data_2_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1376     break;
1377   case V6_INFO_PARAMETER_TAG:
1378     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1379     break;
1380   case V6_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1381     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1382     break;
1383   case V6_ROUTING_CONTEXT_PARAMETER_TAG:
1384     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1385     break;
1386   case V6_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1387     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1388     break;
1389   case V6_HEARTBEAT_DATA_PARAMETER_TAG:
1390     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1391     break;
1392   case V6_USER_CAUSE_PARAMETER_TAG:
1393     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1394     break;
1395   case V6_REASON_PARAMETER_TAG:
1396     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1397     break;
1398   case V6_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1399     dissect_v6_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1400     break;
1401   case V6_ERROR_CODE_PARAMETER_TAG:
1402     dissect_v6_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1403     break;
1404   case V6_STATUS_PARAMETER_TAG:
1405     dissect_v567_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1406     break;
1407   case V6_CONGESTION_INDICATION_PARAMETER_TAG:
1408     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1409     break;
1410   case V6_CONCERNED_DESTINATION_PARAMETER_TAG:
1411     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1412     break;
1413   case V6_ROUTING_KEY_PARAMETER_TAG:
1414     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1415     break;
1416   case V6_REGISTRATION_RESULT_PARAMETER_TAG:
1417     dissect_v67_registration_result_parameter(parameter_tvb, parameter_tree);
1418     break;
1419   case V6_DEREGISTRATION_RESULT_PARAMETER_TAG:
1420     dissect_v67_deregistration_result_parameter(parameter_tvb, parameter_tree);
1421     break;
1422   case V6_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1423     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1424     break;
1425   case V6_DESTINATION_POINT_CODE_PARAMETER_TAG:
1426     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1427     break;
1428   case V6_SERVICE_INDICATORS_PARAMETER_TAG:
1429     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1430     break;
1431   case V6_SUBSYSTEM_NUMBERS_PARAMETER_TAG:
1432     dissect_subsystem_numbers_parameter(parameter_tvb, parameter_tree, parameter_item);
1433     break;
1434   case V6_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1435     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1436     break;
1437   case V6_CIRCUIT_RANGE_PARAMETER_TAG:
1438     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1439     break;
1440   case V6_REGISTRATION_RESULTS_PARAMETER_TAG:
1441     dissect_registration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1442     break;
1443   case V6_DEREGISTRATION_RESULTS_PARAMETER_TAG:
1444     dissect_deregistration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1445     break;
1446   default:
1447     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1448     break;
1449   };
1450
1451   if (padding_length > 0)
1452     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1453 }
1454
1455 #define V7_NETWORK_APPEARANCE_PARAMETER_TAG            0x80
1456 #define V7_PROTOCOL_DATA_1_PARAMETER_TAG               0x81
1457 #define V7_PROTOCOL_DATA_2_PARAMETER_TAG               0x82
1458 #define V7_INFO_PARAMETER_TAG                          0x04
1459 #define V7_AFFECTED_DESTINATIONS_PARAMETER_TAG         0x83
1460 #define V7_ROUTING_CONTEXT_PARAMETER_TAG               0x06
1461 #define V7_DIAGNOSTIC_INFORMATION_PARAMETER_TAG        0x07
1462 #define V7_HEARTBEAT_DATA_PARAMETER_TAG                0x09
1463 #define V7_USER_CAUSE_PARAMETER_TAG                    0x84
1464 #define V7_REASON_PARAMETER_TAG                        0x0a
1465 #define V7_TRAFFIC_MODE_TYPE_PARAMETER_TAG             0x0b
1466 #define V7_ERROR_CODE_PARAMETER_TAG                    0x0c
1467 #define V7_STATUS_PARAMETER_TAG                        0x0d
1468 #define V7_CONGESTION_INDICATION_PARAMETER_TAG         0x85
1469 #define V7_CONCERNED_DESTINATION_PARAMETER_TAG         0x86
1470 #define V7_ROUTING_KEY_PARAMETER_TAG                   0x87
1471 #define V7_REGISTRATION_RESULT_PARAMETER_TAG           0x88
1472 #define V7_DEREGISTRATION_RESULT_PARAMETER_TAG         0x89
1473 #define V7_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG  0x8a
1474 #define V7_DESTINATION_POINT_CODE_PARAMETER_TAG        0x8b
1475 #define V7_SERVICE_INDICATORS_PARAMETER_TAG            0x8c
1476 #define V7_SUBSYSTEM_NUMBERS_PARAMETER_TAG             0x8d
1477 #define V7_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG   0x8e
1478 #define V7_CIRCUIT_RANGE_PARAMETER_TAG                 0x8f
1479 #define V7_REGISTRATION_RESULTS_PARAMETER_TAG          0x90
1480 #define V7_DEREGISTRATION_RESULTS_PARAMETER_TAG        0x91
1481
1482 static const value_string v7_parameter_tag_values[] = {
1483   { V7_NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" },
1484   { V7_PROTOCOL_DATA_1_PARAMETER_TAG,              "Protocol data 1" },
1485   { V7_PROTOCOL_DATA_2_PARAMETER_TAG,              "Protocol data 2" },
1486   { V7_INFO_PARAMETER_TAG,                         "Info" },
1487   { V7_AFFECTED_DESTINATIONS_PARAMETER_TAG,        "Affected destinations" },
1488   { V7_ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" },
1489   { V7_DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic information" },
1490   { V7_HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" },
1491   { V7_USER_CAUSE_PARAMETER_TAG,                   "User / Cause" },
1492   { V7_REASON_PARAMETER_TAG,                       "Reason" },
1493   { V7_TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" },
1494   { V7_ERROR_CODE_PARAMETER_TAG,                   "Error code" },
1495   { V7_STATUS_PARAMETER_TAG,                       "Status" },
1496   { V7_CONGESTION_INDICATION_PARAMETER_TAG,        "Congestion indication" },
1497   { V7_CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" },
1498   { V7_ROUTING_KEY_PARAMETER_TAG,                  "Routing Key" },
1499   { V7_REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" },
1500   { V7_DEREGISTRATION_RESULT_PARAMETER_TAG,        "De-registration result" },
1501   { V7_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" },
1502   { V7_DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" },
1503   { V7_SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" },
1504   { V7_SUBSYSTEM_NUMBERS_PARAMETER_TAG,            "Subsystem numbers" },
1505   { V7_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" },
1506   { V7_CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" },
1507   { V7_REGISTRATION_RESULTS_PARAMETER_TAG,         "Registration results" },
1508   { V7_DEREGISTRATION_RESULTS_PARAMETER_TAG,       "De-registration results" },
1509   { 0,                           NULL } };
1510
1511 static void
1512 dissect_v7_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1513 {
1514   guint16 tag, length, padding_length;
1515   proto_item *parameter_item;
1516   proto_tree *parameter_tree;
1517
1518   /* extract tag and length from the parameter */
1519   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1520   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1521   padding_length = tvb_length(parameter_tvb) - length;
1522
1523   if (!tree && tag != V7_PROTOCOL_DATA_1_PARAMETER_TAG && tag != V7_PROTOCOL_DATA_2_PARAMETER_TAG)
1524     return;     /* Nothing to do here */
1525
1526   /* create proto_tree stuff */
1527   parameter_item   = proto_tree_add_text(m3ua_tree, parameter_tvb, PARAMETER_HEADER_OFFSET, tvb_length(parameter_tvb), val_to_str(tag, v7_parameter_tag_values, "Unknown parameter"));
1528   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1529
1530   /* add tag and length to the parameter tree */
1531   proto_tree_add_item(parameter_tree, hf_v7_parameter_tag, parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1532   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1533
1534   switch(tag) {
1535   case V7_NETWORK_APPEARANCE_PARAMETER_TAG:
1536     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1537     break;
1538   case V7_PROTOCOL_DATA_1_PARAMETER_TAG:
1539     dissect_protocol_data_1_parameter(parameter_tvb, pinfo, tree, parameter_item);
1540     break;
1541   case V7_PROTOCOL_DATA_2_PARAMETER_TAG:
1542     dissect_protocol_data_2_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1543     break;
1544   case V7_INFO_PARAMETER_TAG:
1545     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1546     break;
1547   case V7_AFFECTED_DESTINATIONS_PARAMETER_TAG:
1548     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1549     break;
1550   case V7_ROUTING_CONTEXT_PARAMETER_TAG:
1551     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1552     break;
1553   case V7_DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1554     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1555     break;
1556   case V7_HEARTBEAT_DATA_PARAMETER_TAG:
1557     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1558     break;
1559   case V7_USER_CAUSE_PARAMETER_TAG:
1560     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1561     break;
1562   case V7_REASON_PARAMETER_TAG:
1563     dissect_reason_parameter(parameter_tvb, parameter_tree, parameter_item);
1564     break;
1565   case V7_TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1566     dissect_v7_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1567     break;
1568   case V7_ERROR_CODE_PARAMETER_TAG:
1569     dissect_v7_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1570     break;
1571   case V7_STATUS_PARAMETER_TAG:
1572     dissect_v567_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1573     break;
1574   case V7_CONGESTION_INDICATION_PARAMETER_TAG:
1575     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1576     break;
1577   case V7_CONCERNED_DESTINATION_PARAMETER_TAG:
1578     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1579     break;
1580   case V7_ROUTING_KEY_PARAMETER_TAG:
1581     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1582     break;
1583   case V7_REGISTRATION_RESULT_PARAMETER_TAG:
1584     dissect_v67_registration_result_parameter(parameter_tvb, parameter_tree);
1585     break;
1586   case V7_DEREGISTRATION_RESULT_PARAMETER_TAG:
1587     dissect_v67_deregistration_result_parameter(parameter_tvb, parameter_tree);
1588     break;
1589   case V7_LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1590     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1591     break;
1592   case V7_DESTINATION_POINT_CODE_PARAMETER_TAG:
1593     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1594     break;
1595   case V7_SERVICE_INDICATORS_PARAMETER_TAG:
1596     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1597     break;
1598   case V7_SUBSYSTEM_NUMBERS_PARAMETER_TAG:
1599     dissect_subsystem_numbers_parameter(parameter_tvb, parameter_tree, parameter_item);
1600     break;
1601   case V7_ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1602     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1603     break;
1604   case V7_CIRCUIT_RANGE_PARAMETER_TAG:
1605     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1606     break;
1607   case V7_REGISTRATION_RESULTS_PARAMETER_TAG:
1608     dissect_registration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1609     break;
1610   case V7_DEREGISTRATION_RESULTS_PARAMETER_TAG:
1611     dissect_deregistration_results_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1612     break;
1613   default:
1614     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1615     break;
1616   };
1617
1618   if (padding_length > 0)
1619     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1620 }
1621
1622 #define INFO_STRING_PARAMETER_TAG                  0x0004
1623 #define ROUTING_CONTEXT_PARAMETER_TAG              0x0006
1624 #define DIAGNOSTIC_INFORMATION_PARAMETER_TAG       0x0007
1625 #define HEARTBEAT_DATA_PARAMETER_TAG               0x0009
1626 #define TRAFFIC_MODE_TYPE_PARAMETER_TAG            0x000b
1627 #define ERROR_CODE_PARAMETER_TAG                   0x000c
1628 #define STATUS_PARAMETER_TAG                       0x000d
1629 #define ASP_IDENTIFIER_PARAMETER_TAG               0x0011
1630 #define AFFECTED_POINT_CODE_PARAMETER_TAG          0x0012
1631 #define CORRELATION_IDENTIFIER_PARAMETER_TAG       0x0013
1632
1633 #define NETWORK_APPEARANCE_PARAMETER_TAG           0x0200
1634 #define USER_CAUSE_PARAMETER_TAG                   0x0204
1635 #define CONGESTION_INDICATIONS_PARAMETER_TAG       0x0205
1636 #define CONCERNED_DESTINATION_PARAMETER_TAG        0x0206
1637 #define ROUTING_KEY_PARAMETER_TAG                  0x0207
1638 #define REGISTRATION_RESULT_PARAMETER_TAG          0x0208
1639 #define DEREGISTRATION_RESULT_PARAMETER_TAG        0x0209
1640 #define LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG 0x020a
1641 #define DESTINATION_POINT_CODE_PARAMETER_TAG       0x020b
1642 #define SERVICE_INDICATORS_PARAMETER_TAG           0x020c
1643 #define ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG  0x020e
1644 #define CIRCUIT_RANGE_PARAMETER_TAG                0x020f
1645 #define PROTOCOL_DATA_PARAMETER_TAG                0x0210
1646 #define REGISTRATION_STATUS_PARAMETER_TAG          0x0212
1647 #define DEREGISTRATION_STATUS_PARAMETER_TAG        0x0213
1648
1649 static const value_string parameter_tag_values[] = {
1650   { INFO_STRING_PARAMETER_TAG,                  "Info string" } ,
1651   { ROUTING_CONTEXT_PARAMETER_TAG,              "Routing context" } ,
1652   { DIAGNOSTIC_INFORMATION_PARAMETER_TAG,       "Diagnostic Information" } ,
1653   { HEARTBEAT_DATA_PARAMETER_TAG,               "Heartbeat data" } ,
1654   { TRAFFIC_MODE_TYPE_PARAMETER_TAG,            "Traffic mode type" } ,
1655   { ERROR_CODE_PARAMETER_TAG,                   "Error code" } ,
1656   { STATUS_PARAMETER_TAG,                       "Status" } ,
1657   { ASP_IDENTIFIER_PARAMETER_TAG,               "ASP identifier" } ,
1658   { AFFECTED_POINT_CODE_PARAMETER_TAG,          "Affected point code" } ,
1659   { CORRELATION_IDENTIFIER_PARAMETER_TAG,       "Correlation identifier" } ,
1660   { NETWORK_APPEARANCE_PARAMETER_TAG,           "Network appearance" } ,
1661   { USER_CAUSE_PARAMETER_TAG,                   "User / cause" } ,
1662   { CONGESTION_INDICATIONS_PARAMETER_TAG,       "Congestion indications" } ,
1663   { CONCERNED_DESTINATION_PARAMETER_TAG,        "Concerned destination" } ,
1664   { ROUTING_KEY_PARAMETER_TAG,                  "Routing key" } ,
1665   { REGISTRATION_RESULT_PARAMETER_TAG,          "Registration result" } ,
1666   { DEREGISTRATION_RESULT_PARAMETER_TAG,        "Deregistration result" } ,
1667   { LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG, "Local routing key identifier" } ,
1668   { DESTINATION_POINT_CODE_PARAMETER_TAG,       "Destination point code" } ,
1669   { SERVICE_INDICATORS_PARAMETER_TAG,           "Service indicators" } ,
1670   { ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG,  "Originating point code list" } ,
1671   { CIRCUIT_RANGE_PARAMETER_TAG,                "Circuit range" } ,
1672   { PROTOCOL_DATA_PARAMETER_TAG,                "Protocol data" } ,
1673   { REGISTRATION_STATUS_PARAMETER_TAG,          "Registration status" } ,
1674   { DEREGISTRATION_STATUS_PARAMETER_TAG,        "Deregistration status" } ,
1675   { 0,                           NULL } };
1676
1677 static void
1678 dissect_parameter(tvbuff_t *parameter_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1679 {
1680   guint16 tag, length, padding_length;
1681   proto_item *parameter_item;
1682   proto_tree *parameter_tree;
1683
1684   /* extract tag and length from the parameter */
1685   tag            = tvb_get_ntohs(parameter_tvb, PARAMETER_TAG_OFFSET);
1686   length         = tvb_get_ntohs(parameter_tvb, PARAMETER_LENGTH_OFFSET);
1687   padding_length = tvb_length(parameter_tvb) - length;
1688
1689
1690   if (!tree && tag != PROTOCOL_DATA_PARAMETER_TAG)
1691     return;     /* Nothing to do here */
1692
1693   /* create proto_tree stuff */
1694   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"));
1695   parameter_tree   = proto_item_add_subtree(parameter_item, ett_parameter);
1696
1697   /* add tag and length to the parameter tree */
1698   proto_tree_add_item(parameter_tree, hf_parameter_tag,    parameter_tvb, PARAMETER_TAG_OFFSET,    PARAMETER_TAG_LENGTH,    NETWORK_BYTE_ORDER);
1699   proto_tree_add_item(parameter_tree, hf_parameter_length, parameter_tvb, PARAMETER_LENGTH_OFFSET, PARAMETER_LENGTH_LENGTH, NETWORK_BYTE_ORDER);
1700
1701   switch(tag) {
1702   case INFO_STRING_PARAMETER_TAG:
1703     dissect_info_string_parameter(parameter_tvb, parameter_tree, parameter_item);
1704     break;
1705   case ROUTING_CONTEXT_PARAMETER_TAG:
1706     dissect_routing_context_parameter(parameter_tvb, parameter_tree, parameter_item);
1707     break;
1708   case DIAGNOSTIC_INFORMATION_PARAMETER_TAG:
1709     dissect_diagnostic_information_parameter(parameter_tvb, parameter_tree, parameter_item);
1710     break;
1711   case HEARTBEAT_DATA_PARAMETER_TAG:
1712     dissect_heartbeat_data_parameter(parameter_tvb, parameter_tree, parameter_item);
1713     break;
1714   case TRAFFIC_MODE_TYPE_PARAMETER_TAG:
1715     dissect_traffic_mode_type_parameter(parameter_tvb, parameter_tree, parameter_item);
1716     break;
1717   case ERROR_CODE_PARAMETER_TAG:
1718     dissect_error_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1719     break;
1720   case STATUS_PARAMETER_TAG:
1721     dissect_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1722     break;
1723   case ASP_IDENTIFIER_PARAMETER_TAG:
1724     dissect_asp_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1725     break;
1726   case AFFECTED_POINT_CODE_PARAMETER_TAG:
1727     dissect_affected_destinations_parameter(parameter_tvb, parameter_tree, parameter_item);
1728     break;
1729   case NETWORK_APPEARANCE_PARAMETER_TAG:
1730     dissect_network_appearance_parameter(parameter_tvb, parameter_tree, parameter_item);
1731     break;
1732   case USER_CAUSE_PARAMETER_TAG:
1733     dissect_user_cause_parameter(parameter_tvb, parameter_tree, parameter_item);
1734     break;
1735   case CONGESTION_INDICATIONS_PARAMETER_TAG:
1736     dissect_congestion_indication_parameter(parameter_tvb, parameter_tree, parameter_item);
1737     break;
1738   case CONCERNED_DESTINATION_PARAMETER_TAG:
1739     dissect_concerned_destination_parameter(parameter_tvb, parameter_tree, parameter_item);
1740     break;
1741   case ROUTING_KEY_PARAMETER_TAG:
1742     dissect_routing_key_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1743     break;
1744   case REGISTRATION_RESULT_PARAMETER_TAG:
1745     dissect_registration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1746     break;
1747   case DEREGISTRATION_RESULT_PARAMETER_TAG:
1748     dissect_deregistration_result_parameter(parameter_tvb, pinfo, tree, parameter_tree);
1749     break;
1750   case LOCAL_ROUTING_KEY_IDENTIFIER_PARAMETER_TAG:
1751     dissect_local_routing_key_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1752     break;
1753   case DESTINATION_POINT_CODE_PARAMETER_TAG:
1754     dissect_destination_point_code_parameter(parameter_tvb, parameter_tree, parameter_item);
1755     break;
1756   case SERVICE_INDICATORS_PARAMETER_TAG:
1757     dissect_service_indicators_parameter(parameter_tvb, parameter_tree, parameter_item);
1758     break;
1759   case ORIGINATING_POINT_CODE_LIST_PARAMETER_TAG:
1760     dissect_originating_point_code_list_parameter(parameter_tvb, parameter_tree, parameter_item);
1761     break;
1762   case CIRCUIT_RANGE_PARAMETER_TAG:
1763     dissect_circuit_range_parameter(parameter_tvb, parameter_tree, parameter_item);
1764     break;
1765   case PROTOCOL_DATA_PARAMETER_TAG:
1766     dissect_protocol_data_parameter(parameter_tvb, pinfo, tree, parameter_tree, parameter_item);
1767     break;
1768   case CORRELATION_IDENTIFIER_PARAMETER_TAG:
1769     dissect_correlation_identifier_parameter(parameter_tvb, parameter_tree, parameter_item);
1770     break;
1771   case REGISTRATION_STATUS_PARAMETER_TAG:
1772     dissect_registration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1773     break;
1774   case DEREGISTRATION_STATUS_PARAMETER_TAG:
1775     dissect_deregistration_status_parameter(parameter_tvb, parameter_tree, parameter_item);
1776     break;
1777   default:
1778     dissect_unknown_parameter(parameter_tvb, parameter_tree, parameter_item);
1779     break;
1780   };
1781
1782   if (padding_length > 0)
1783     proto_tree_add_item(parameter_tree, hf_parameter_padding, parameter_tvb, PARAMETER_HEADER_OFFSET + length, padding_length, NETWORK_BYTE_ORDER);
1784 }
1785
1786 static void
1787 dissect_parameters(tvbuff_t *parameters_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1788 {
1789   gint offset, length, total_length, remaining_length;
1790   tvbuff_t *parameter_tvb;
1791
1792   offset = 0;
1793   while((remaining_length = tvb_length_remaining(parameters_tvb, offset))) {
1794     length       = tvb_get_ntohs(parameters_tvb, offset + PARAMETER_LENGTH_OFFSET);
1795     total_length = ADD_PADDING(length);
1796     if (remaining_length >= length)
1797       total_length = MIN(total_length, remaining_length);
1798     /* create a tvb for the parameter including the padding bytes */
1799     parameter_tvb    = tvb_new_subset(parameters_tvb, offset, total_length, total_length);
1800     switch(version) {
1801       case M3UA_V5:
1802         dissect_v5_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1803         break;
1804       case M3UA_V6:
1805         dissect_v6_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1806         break;
1807       case M3UA_V7:
1808         dissect_v7_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1809         break;
1810       case M3UA_RFC:
1811         dissect_parameter(parameter_tvb, pinfo, tree, m3ua_tree);
1812         break;
1813     }
1814     /* get rid of the handled parameter */
1815     offset += total_length;
1816   }
1817 }
1818
1819
1820 static void
1821 dissect_message(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree, proto_tree *m3ua_tree)
1822 {
1823   tvbuff_t *common_header_tvb, *parameters_tvb;
1824
1825   common_header_tvb = tvb_new_subset(message_tvb, 0, COMMON_HEADER_LENGTH, COMMON_HEADER_LENGTH);
1826   parameters_tvb    = tvb_new_subset(message_tvb, COMMON_HEADER_LENGTH, -1, -1);
1827   if (version == M3UA_V5)
1828         dissect_v5_common_header(common_header_tvb, pinfo, m3ua_tree);
1829   else
1830     dissect_common_header(common_header_tvb, pinfo, m3ua_tree);
1831
1832   /*  Need to dissect (certain) parameters even when !tree, so subdissectors
1833    *  (e.g., MTP3) are always called.
1834    */
1835   dissect_parameters(parameters_tvb, pinfo, tree, m3ua_tree);
1836 }
1837
1838 static void
1839 dissect_m3ua(tvbuff_t *message_tvb, packet_info *pinfo, proto_tree *tree)
1840 {
1841   proto_item *m3ua_item;
1842   proto_tree *m3ua_tree;
1843
1844   /* make entry in the Protocol column on summary display */
1845   if (check_col(pinfo->cinfo, COL_PROTOCOL))
1846     switch(version) {
1847       case M3UA_V5:
1848         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (ID 05)");
1849         break;
1850       case M3UA_V6:
1851         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (ID 06)");
1852         break;
1853       case M3UA_V7:
1854         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (ID 07)");
1855         break;
1856       case M3UA_RFC:
1857         col_set_str(pinfo->cinfo, COL_PROTOCOL, "M3UA (RFC 3332)");
1858         break;
1859       };
1860
1861   /* In the interest of speed, if "tree" is NULL, don't do any work not
1862      necessary to generate protocol tree items. */
1863   if (tree) {
1864     /* create the m3ua protocol tree */
1865     m3ua_item = proto_tree_add_item(tree, proto_m3ua, message_tvb, 0, -1, FALSE);
1866     m3ua_tree = proto_item_add_subtree(m3ua_item, ett_m3ua);
1867   } else {
1868     m3ua_tree = NULL;
1869   };
1870
1871   /* dissect the message */
1872   dissect_message(message_tvb, pinfo, tree, m3ua_tree);
1873 }
1874
1875 /* Register the protocol with Ethereal */
1876 void
1877 proto_register_m3ua(void)
1878 {
1879
1880   /* Setup list of header fields */
1881   static hf_register_info hf[] = {
1882     { &hf_version,                          { "Version",                      "m3ua.version",                               FT_UINT8,  BASE_DEC,  VALS(protocol_version_values),                0x0, "", HFILL } },
1883     { &hf_reserved,                         { "Reserved",                     "m3ua.reserved",                              FT_UINT8,  BASE_HEX,  NULL,                                         0x0, "", HFILL } },
1884     { &hf_v5_message_class,                 { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(v5_message_class_values),                0x0, "", HFILL } },
1885     { &hf_message_class,                    { "Message class",                "m3ua.message_class",                         FT_UINT8,  BASE_DEC,  VALS(message_class_values),                   0x0, "", HFILL } },
1886     { &hf_message_type,                     { "Message Type",                 "m3ua.message_type",                          FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1887     { &hf_message_length,                   { "Message length",               "m3ua.message_length",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1888     { &hf_v5_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v5_parameter_tag_values),                0x0, "", HFILL } },
1889     { &hf_v6_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v6_parameter_tag_values),                0x0, "", HFILL } },
1890     { &hf_v7_parameter_tag,                 { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(v7_parameter_tag_values),                0x0, "", HFILL } },
1891     { &hf_parameter_tag,                    { "Parameter Tag",                "m3ua.parameter_tag",                         FT_UINT16, BASE_DEC,  VALS(parameter_tag_values),                   0x0, "", HFILL } },
1892     { &hf_parameter_length,                 { "Parameter length",             "m3ua.parameter_length",                      FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1893     { &hf_parameter_value,                  { "Parameter value",              "m3ua.parameter_value",                       FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1894     { &hf_parameter_padding,                { "Padding",                      "m3ua.parameter_padding",                     FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1895     { &hf_parameter_trailer,                { "Trailer",                      "m3ua.paramter_trailer",                      FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1896     { &hf_network_appearance,               { "Network appearance",           "m3ua.network_appearance",                    FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1897     { &hf_info_string,                      { "Info string",                  "m3ua.info_string",                           FT_STRING, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1898     { &hf_routing_context,                  { "Routing context",              "m3ua.routing_context",                       FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1899     { &hf_diagnostic_information,           { "Diagnostic information",       "m3ua.diagnostic_information",                FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1900     { &hf_heartbeat_data,                   { "Heartbeat data",               "m3ua.heartbeat_data",                        FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1901     { &hf_v5_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v5_error_code_values),                   0x0, "", HFILL } },
1902     { &hf_v6_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v6_error_code_values),                   0x0, "", HFILL } },
1903     { &hf_v7_error_code,                    { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(v7_error_code_values),                   0x0, "", HFILL } },
1904     { &hf_error_code,                       { "Error code",                   "m3ua.error_code",                            FT_UINT32, BASE_DEC,  VALS(error_code_values),                      0x0, "", HFILL } },
1905     { &hf_status_type,                      { "Status type",                  "m3ua.status_type",                           FT_UINT16, BASE_DEC,  VALS(status_type_values),                     0x0, "", HFILL } },
1906     { &hf_status_info,                      { "Status info",                  "m3ua.status_info",                           FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1907     { &hf_asp_identifier,                   { "ASP identifier",               "m3ua.asp_identifier",                        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1908     { &hf_affected_point_code_mask,         { "Mask",                         "m3ua.affected_point_code_mask",              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1909     { &hf_affected_point_code_pc,           { "Affected point code",          "m3ua.affected_point_code_pc",                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1910     { &hf_cause,                            { "Unavailability cause",         "m3ua.unavailability_cause",                  FT_UINT16, BASE_DEC,  VALS(unavailability_cause_values),            0x0, "", HFILL } },
1911     { &hf_user,                             { "User Identity",                "m3ua.user_identity",                         FT_UINT16, BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1912     { &hf_reason,                           { "Reason",                       "m3ua.reason",                                FT_UINT32, BASE_DEC,  VALS(reason_values),                          0x0, "", HFILL } },
1913     { &hf_v5_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v5_traffic_mode_type_values),            0x0, "", HFILL } },
1914     { &hf_v6_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v6_traffic_mode_type_values),            0x0, "", HFILL } },
1915     { &hf_v7_traffic_mode_type,             { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(v7_traffic_mode_type_values),            0x0, "", HFILL } },
1916     { &hf_traffic_mode_type,                { "Traffic mode Type",            "m3ua.traffic_mode_type",                     FT_UINT32, BASE_DEC,  VALS(traffic_mode_type_values),               0x0, "", HFILL } },
1917     { &hf_congestion_reserved,              { "Reserved",                     "m3ua.congestion_reserved",                   FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1918     { &hf_congestion_level,                 { "Congestion level",             "m3ua.congestion_level",                      FT_UINT8,  BASE_DEC,  VALS(congestion_level_values),                0x0, "", HFILL } },
1919     { &hf_concerned_dest_reserved,          { "Reserved",                     "m3ua.concerned_reserved",                    FT_BYTES,  BASE_NONE, NULL,                                         0x0, "", HFILL } },
1920     { &hf_concerned_dest_pc,                { "Concerned DPC",                "m3ua.concerned_dpc",                         FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1921     { &hf_local_rk_identifier,              { "Local routing key identifier", "m3ua.local_rk_identifier",                   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1922     { &hf_dpc_mask,                         { "Mask",                         "m3ua.dpc_mask",                              FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1923     { &hf_dpc_pc,                           { "Destination point code",       "m3ua.dpc_pc",                                FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1924     { &hf_si,                               { "Service indicator",            "m3ua.si",                                    FT_UINT8,  BASE_DEC,  VALS(user_identity_values),                   0x0, "", HFILL } },
1925     { &hf_ssn,                              { "Subsystem number",             "m3ua.ssn",                                   FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1926     { &hf_opc_list_mask,                    { "Mask",                         "m3ua.opc_list_mask",                         FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1927     { &hf_opc_list_pc,                      { "Originating point code",       "m3ua.opc_list_pc",                           FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1928     { &hf_cic_range_mask,                   { "Mask",                         "m3ua.cic_range_mask",                        FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1929     { &hf_cic_range_pc,                     { "Originating point code",       "m3ua.cic_range_pc",                          FT_UINT24, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1930     { &hf_cic_range_lower,                  { "Lower CIC value",              "m3ua.cic_range_lower",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1931     { &hf_cic_range_upper,                  { "Upper CIC value",              "m3ua.cic_range_upper",                       FT_UINT16, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1932     { &hf_li,                               { "Length indicator",             "m3ua.protocol_data_2_li",                    FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1933     { &hf_protocol_data_opc,                { "OPC",                          "m3ua.protocol_data_opc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1934     { &hf_protocol_data_dpc,                { "DPC",                          "m3ua.protocol_data_dpc",                     FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1935     { &hf_protocol_data_si,                 { "SI",                           "m3ua.protocol_data_si",                      FT_UINT8,  BASE_DEC,  VALS(user_identity_values),                                         0x0, "", HFILL } },
1936     { &hf_protocol_data_ni,                 { "NI",                           "m3ua.protocol_data_ni",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1937     { &hf_protocol_data_mp,                 { "MP",                           "m3ua.protocol_data_mp",                      FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1938     { &hf_protocol_data_sls,                { "SLS",                          "m3ua.protocol_data_sls",                     FT_UINT8,  BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1939     { &hf_correlation_identifier,           { "Correlation Identifier",       "m3ua.correlation_identifier",                FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1940     { &hf_registration_status,              { "Registration status",          "m3ua.registration_status",                   FT_UINT32, BASE_DEC,  VALS(registration_status_values),             0x0, "", HFILL } },
1941     { &hf_deregistration_status,            { "Deregistration status",        "m3ua.deregistration_status",                 FT_UINT32, BASE_DEC,  VALS(deregistration_status_values),           0x0, "", HFILL } },
1942     { &hf_registration_result_identifier,   { "Local RK-identifier value",    "m3ua.registration_result_identifier",        FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1943     { &hf_registration_result_status,       { "Registration status",          "m3ua.registration_results_status",           FT_UINT32, BASE_DEC,  VALS(registration_result_status_values),      0x0, "", HFILL } },
1944     { &hf_registration_result_context,      { "Routing context",              "m3ua.registration_result_routing_context",   FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1945     { &hf_v6_deregistration_result_status,  { "De-Registration status",       "m3ua.deregistration_results_status",         FT_UINT32, BASE_DEC,  VALS(v6_deregistration_result_status_values), 0x0, "", HFILL } },
1946     { &hf_v6_deregistration_result_context, { "Routing context",              "m3ua.deregistration_result_routing_context", FT_UINT32, BASE_DEC,  NULL,                                         0x0, "", HFILL } },
1947   };
1948
1949   /* Setup protocol subtree array */
1950   static gint *ett[] = {
1951     &ett_m3ua,
1952     &ett_parameter,
1953   };
1954
1955   static enum_val_t options[] = {
1956     { "Internet Draft version 5",        M3UA_V5  },
1957     { "Internet Draft version 6",        M3UA_V6  },
1958     { "Internet Draft version 7",        M3UA_V7  },
1959     { "RFC 3332",                        M3UA_RFC },
1960     { NULL, 0 }
1961   };
1962
1963   /* Register the protocol name and description */
1964   proto_m3ua = proto_register_protocol("MTP 3 User Adaptation Layer", "M3UA",  "m3ua");
1965   m3ua_module = prefs_register_protocol(proto_m3ua, NULL);
1966   prefs_register_enum_preference(m3ua_module, "version", "M3UA Version", "Version used by Ethereal", (gint *)&version, options, FALSE);
1967
1968   /* Required function calls to register the header fields and subtrees used */
1969   proto_register_field_array(proto_m3ua, hf, array_length(hf));
1970   proto_register_subtree_array(ett, array_length(ett));
1971   si_dissector_table = register_dissector_table("m3ua.protocol_data_si", "MTP3 Service indicator", FT_UINT8, BASE_HEX);
1972
1973 }
1974
1975 void
1976 proto_reg_handoff_m3ua(void)
1977 {
1978   dissector_handle_t m3ua_handle;
1979
1980   /*
1981    * Get a handle for the MTP3 dissector.
1982    */
1983   mtp3_handle = find_dissector("mtp3");
1984   data_handle = find_dissector("data");
1985   m3ua_handle = create_dissector_handle(dissect_m3ua, proto_m3ua);
1986   dissector_add("sctp.ppi",  M3UA_PAYLOAD_PROTOCOL_ID, m3ua_handle);
1987   dissector_add("sctp.port", SCTP_PORT_M3UA, m3ua_handle);
1988 }