asn1/h245/packet-h245-template.c

   1 /* packet-h245_asn1.c
   2  * Routines for h245 packet dissection
   3  * Copyright 2004, Anders Broman <anders.broman@ericsson.com>
   4  *
   5  * $Id$
   6  *
   7  * Wireshark - Network traffic analyzer
   8  * By Gerald Combs <gerald@wireshark.org>
   9  * Copyright 1998 Gerald Combs
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  *
  25  * To quote the author of the previous H245 dissector:
  26  *   "This is a complete replacement of the previous limitied dissector
  27  * that Ronnie was crazy enough to write by hand. It was a lot of time
  28  * to hack it by hand, but it is incomplete and buggy and it is good when
  29  * it will go away."
  30  * Ronnie did a great job and all the VoIP users had made good use of it!
  31  * Credit to Tomas Kukosa for developing the asn2wrs compiler.
  32  *
  33  */
  34
  35 #ifdef HAVE_CONFIG_H
  36 # include "config.h"
  37 #endif
  38
  39 #include <glib.h>
  40 #include <epan/packet.h>
  41 #include <epan/strutil.h>
  42
  43 #include <stdio.h>
  44 #include <string.h>
  45
  46 #include <epan/prefs.h>
  47 #include <epan/t35.h>
  48 #include <epan/emem.h>
  49 #include <epan/oids.h>
  50 #include <epan/asn1.h>
  51 #include <epan/tap.h>
  52 #include "packet-tpkt.h"
  53 #include "packet-per.h"
  54 #include "packet-h323.h"
  55 #include "packet-h245.h"
  56 #include "packet-rtp.h"
  57 #include "packet-rtcp.h"
  58 #include "packet-t38.h"
  59
  60 #define PNAME  "MULTIMEDIA-SYSTEM-CONTROL"
  61 #define PSNAME "H.245"
  62 #define PFNAME "h245"
  63
  64 static dissector_handle_t rtp_handle=NULL;
  65 static dissector_handle_t rtcp_handle=NULL;
  66 static dissector_handle_t t38_handle=NULL;
  67 static dissector_table_t nsp_object_dissector_table;
  68 static dissector_table_t nsp_h221_dissector_table;
  69 static dissector_table_t gef_name_dissector_table;
  70 static dissector_table_t gef_content_dissector_table;
  71 static dissector_handle_t nsp_handle;
  72 static dissector_handle_t data_handle;
  73 static dissector_handle_t MultimediaSystemControlMessage_handle;
  74 static dissector_handle_t h263_handle = NULL;
  75 static dissector_handle_t amr_handle = NULL;
  76
  77 static void init_h245_packet_info(h245_packet_info *pi);
  78 static int hf_h245_pdu_type = -1;
  79 static int hf_h245Manufacturer = -1;
  80 static int h245_tap = -1;
  81 static int h245dg_tap = -1;
  82 h245_packet_info *h245_pi=NULL;
  83
  84 static gboolean h245_reassembly = TRUE;
  85 static gboolean h245_shorttypes = FALSE;
  86
  87 #include "packet-h245-val.h"
  88
  89 static const value_string h245_RequestMessage_short_vals[] = {
  90         { RequestMessage_nonStandard              ,     "NSM" },
  91         { RequestMessage_masterSlaveDetermination ,     "MSD" },
  92         { RequestMessage_terminalCapabilitySet    ,     "TCS" },
  93         { RequestMessage_openLogicalChannel       ,     "OLC" },
  94         { RequestMessage_closeLogicalChannel      ,     "CLC" },
  95         { RequestMessage_requestChannelClose      ,     "RCC" },
  96         { RequestMessage_multiplexEntrySend       ,     "MES" },
  97         { RequestMessage_requestMultiplexEntry    ,     "RME" },
  98         { RequestMessage_requestMode              ,     "RM"  },
  99         { RequestMessage_roundTripDelayRequest    ,     "RTDR" },
 100         { RequestMessage_maintenanceLoopRequest   ,     "MLR" },
 101         { RequestMessage_communicationModeRequest ,     "CMR" },
 102         { RequestMessage_conferenceRequest        ,     "CR"  },
 103         { RequestMessage_multilinkRequest         ,     "MR"  },
 104         { RequestMessage_logicalChannelRateRequest,     "LCRR" },
 105         { RequestMessage_genericRequest           ,     "GR"  },
 106         {  0, NULL }
 107 };
 108 static const value_string h245_ResponseMessage_short_vals[] = {
 109         { ResponseMessage_nonStandard                   ,       "NSM" },
 110         { ResponseMessage_masterSlaveDeterminationAck   ,       "MSDAck" },
 111         { ResponseMessage_masterSlaveDeterminationReject,       "MSDReject" },
 112         { ResponseMessage_terminalCapabilitySetAck      ,       "TCSAck" },
 113         { ResponseMessage_terminalCapabilitySetReject   ,       "TCSReject" },
 114         { ResponseMessage_openLogicalChannelAck         ,       "OLCAck" },
 115         { ResponseMessage_openLogicalChannelReject      ,       "OLCReject" },
 116         { ResponseMessage_closeLogicalChannelAck        ,       "CLCAck" },
 117         { ResponseMessage_requestChannelCloseAck        ,       "RCCAck" },
 118         { ResponseMessage_requestChannelCloseReject     ,       "RCCReject" },
 119         { ResponseMessage_multiplexEntrySendAck         ,       "MESAck" },
 120         { ResponseMessage_multiplexEntrySendReject      ,       "MESReject" },
 121         { ResponseMessage_requestMultiplexEntryAck      ,       "RMEAck" },
 122         { ResponseMessage_requestMultiplexEntryReject   ,       "RMEReject" },
 123         { ResponseMessage_requestModeAck                ,       "RMAck" },
 124         { ResponseMessage_requestModeReject             ,       "RMReject" },
 125         { ResponseMessage_roundTripDelayResponse        ,       "RTDResponse" },
 126         { ResponseMessage_maintenanceLoopAck            ,       "MLAck" },
 127         { ResponseMessage_maintenanceLoopReject         ,       "MLReject" },
 128         { ResponseMessage_communicationModeResponse     ,       "CMResponse" },
 129         { ResponseMessage_conferenceResponse            ,       "CResponse" },
 130         { ResponseMessage_multilinkResponse             ,       "MResponse" },
 131         { ResponseMessage_logicalChannelRateAcknowledge ,       "LCRAck" },
 132         { ResponseMessage_logicalChannelRateReject      ,       "LCRReject" },
 133         { ResponseMessage_genericResponse               ,       "GR" },
 134         {  0, NULL }
 135 };
 136 static const value_string h245_IndicationMessage_short_vals[] = {
 137         { IndicationMessage_nonStandard                             ,   "NSM" },
 138         { IndicationMessage_functionNotUnderstood                   ,   "FNU" },
 139         { IndicationMessage_masterSlaveDeterminationRelease         ,   "MSDRelease" },
 140         { IndicationMessage_terminalCapabilitySetRelease            ,   "TCSRelease" },
 141         { IndicationMessage_openLogicalChannelConfirm               ,   "OLCConfirm" },
 142         { IndicationMessage_requestChannelCloseRelease              ,   "RCCRelease" },
 143         { IndicationMessage_multiplexEntrySendRelease               ,   "MESRelease" },
 144         { IndicationMessage_requestMultiplexEntryRelease            ,   "RMERelease" },
 145         { IndicationMessage_requestModeRelease                      ,   "RMRelease" },
 146         { IndicationMessage_miscellaneousIndication                 ,   "MI" },
 147         { IndicationMessage_jitterIndication                        ,   "JI" },
 148         { IndicationMessage_h223SkewIndication                      ,   "H223SI" },
 149         { IndicationMessage_newATMVCIndication                      ,   "NATMVCI" },
 150         { IndicationMessage_userInput                               ,   "UII" },
 151         { IndicationMessage_h2250MaximumSkewIndication              ,   "H2250MSI" },
 152         { IndicationMessage_mcLocationIndication                    ,   "MCLI" },
 153         { IndicationMessage_conferenceIndication                    ,   "CI" },
 154         { IndicationMessage_vendorIdentification                    ,   "VI" },
 155         { IndicationMessage_functionNotSupported                    ,   "FNS" },
 156         { IndicationMessage_multilinkIndication                     ,   "MultilinkIndication" },
 157         { IndicationMessage_logicalChannelRateRelease               ,   "LCRRelease" },
 158         { IndicationMessage_flowControlIndication                   ,   "FCIndication" },
 159         { IndicationMessage_mobileMultilinkReconfigurationIndication,   "MMRI" },
 160         { IndicationMessage_genericIndication                       ,   "GI" },
 161         {  0, NULL }
 162 };
 163 static const value_string h245_CommandMessage_short_vals[] = {
 164         { CommandMessage_nonStandard                          , "NSM" },
 165         { CommandMessage_maintenanceLoopOffCommand            , "MLOC" },
 166         { CommandMessage_sendTerminalCapabilitySet            , "STCS" },
 167         { CommandMessage_encryptionCommand                    , "EC" },
 168         { CommandMessage_flowControlCommand                   , "FCC" },
 169         { CommandMessage_endSessionCommand                    , "ESC" },
 170         { CommandMessage_miscellaneousCommand                 , "MC" },
 171         { CommandMessage_communicationModeCommand             , "CMC" },
 172         { CommandMessage_conferenceCommand                    , "CC" },
 173         { CommandMessage_h223MultiplexReconfiguration         , "H223MR" },
 174         { CommandMessage_newATMVCCommand                      , "NATMVCC" },
 175         { CommandMessage_mobileMultilinkReconfigurationCommand, "MMRC" },
 176         { CommandMessage_genericCommand                       , "GC" },
 177         {  0, NULL }
 178 };
 179
 180 static const value_string h245_AudioCapability_short_vals[] = {
 181   { AudioCapability_nonStandard           , "nonStd" },
 182   { AudioCapability_g711Alaw64k           , "g711A" },
 183   { AudioCapability_g711Alaw56k           , "g711A56k" },
 184   { AudioCapability_g711Ulaw64k           , "g711U" },
 185   { AudioCapability_g711Ulaw56k           , "g711U56k" },
 186   { AudioCapability_g722_64k              , "g722-64k" },
 187   { AudioCapability_g722_56k              , "g722-56k" },
 188   { AudioCapability_g722_48k              , "g722-48k" },
 189   { AudioCapability_g7231                 , "g7231" },
 190   { AudioCapability_g728                  , "g728" },
 191   { AudioCapability_g729                  , "g729" },
 192   { AudioCapability_g729AnnexA            , "g729A" },
 193   { AudioCapability_is11172AudioCapability, "is11172" },
 194   { AudioCapability_is13818AudioCapability, "is13818" },
 195   { AudioCapability_g729wAnnexB           , "g729B" },
 196   { AudioCapability_g729AnnexAwAnnexB     , "g729AB" },
 197   { AudioCapability_g7231AnnexCCapability , "g7231C" },
 198   { AudioCapability_gsmFullRate           , "gsmFR" },
 199   { AudioCapability_gsmHalfRate           , "gsmHR" },
 200   { AudioCapability_gsmEnhancedFullRate   , "gsmEFR" },
 201   { AudioCapability_genericAudioCapability, "generic" },
 202   { AudioCapability_g729Extensions        , "g729Ext" },
 203   { AudioCapability_vbd                   , "vbd" },
 204   { AudioCapability_audioTelephonyEvent   , "audioTelEvent" },
 205   { AudioCapability_audioTone             , "audioTone" },
 206   {  0, NULL }
 207 };
 208
 209 /* To put the codec type only in COL_INFO when
 210    an OLC is read */
 211 const char* codec_type = NULL;
 212 static guint32 rfc_number;
 213
 214 typedef struct _unicast_addr_t {
 215   address addr;
 216   guint8 addr_buf[16];
 217   guint32 port;
 218 } unicast_addr_t;
 219
 220 typedef struct _channel_info_t {
 221   gchar data_type_str[32];
 222   unicast_addr_t *upcoming_addr;
 223   unicast_addr_t media_addr;
 224   unicast_addr_t media_control_addr;
 225   unsigned int rfc2198;
 226   gboolean srtp_flag;
 227   gboolean is_video;
 228 } channel_info_t;
 229
 230 typedef struct _olc_info_t {
 231   guint16 fwd_lc_num;
 232   channel_info_t fwd_lc;
 233   channel_info_t rev_lc;
 234 } olc_info_t;
 235
 236 static GHashTable* h245_pending_olc_reqs = NULL;
 237 static gboolean fast_start = FALSE;
 238 static olc_info_t *upcoming_olc = NULL;
 239 static channel_info_t *upcoming_channel = NULL;
 240
 241 /* NonStandardParameter */
 242 static const char *nsiOID;
 243 static guint32 h221NonStandard;
 244 static guint32 t35CountryCode;
 245 static guint32 t35Extension;
 246 static guint32 manufacturerCode;
 247
 248 static const value_string h245_RFC_number_vals[] = {
 249         {  2190,        "RFC 2190 - H.263 Video Streams" },
 250         {  2198,        "RFC 2198 - RTP Payload for Redundant Audio Data" },
 251         {  2429,        "RFC 2429 - 1998 Version of ITU-T Rec. H.263 Video (H.263+)" },
 252         {  3016,        "RFC 3016 - RTP Payload Format for MPEG-4 Audio/Visual Streams" },
 253         {  3267,        "RFC 3267 - Adaptive Multi-Rate (AMR) and Adaptive Multi-Rate Wideband (AMR-WB)" },
 254         {  3984,        "RFC 3984 - RTP Payload Format for H.264 Video" },
 255         {  0, NULL }
 256 };
 257
 258 /* h223 multiplex codes */
 259 static h223_set_mc_handle_t h223_set_mc_handle = NULL;
 260 h223_mux_element *h223_me=NULL;
 261 guint8 h223_mc=0;
 262 void h245_set_h223_set_mc_handle( h223_set_mc_handle_t handle )
 263 {
 264         h223_set_mc_handle = handle;
 265 }
 266
 267 /* h223 logical channels */
 268 typedef struct {
 269         h223_lc_params *fw_channel_params;
 270         h223_lc_params *rev_channel_params;
 271 } h223_pending_olc;
 272
 273 static GHashTable*          h223_pending_olc_reqs[] = { NULL, NULL };
 274 static dissector_handle_t   h245_lc_dissector;
 275 static guint16              h245_lc_temp;
 276 static guint16              h223_fw_lc_num;
 277 static guint16              h223_rev_lc_num;
 278 static h223_lc_params      *h223_lc_params_temp;
 279 static h223_lc_params      *h223_fw_lc_params;
 280 static h223_lc_params      *h223_rev_lc_params;
 281 static h223_add_lc_handle_t h223_add_lc_handle = NULL;
 282
 283 static void h223_lc_init_dir( int dir )
 284 {
 285         if ( h223_pending_olc_reqs[dir] )
 286                 g_hash_table_destroy( h223_pending_olc_reqs[dir] );
 287         h223_pending_olc_reqs[dir] = g_hash_table_new( g_direct_hash, g_direct_equal );
 288 }
 289
 290 static void h223_lc_init( void )
 291 {
 292         h223_lc_init_dir( P2P_DIR_SENT );
 293         h223_lc_init_dir( P2P_DIR_RECV );
 294         h223_lc_params_temp = NULL;
 295         h245_lc_dissector = NULL;
 296         h223_fw_lc_num = 0;
 297 }
 298
 299 static void h245_init(void)
 300 {
 301         if ( h245_pending_olc_reqs)
 302                 g_hash_table_destroy(h245_pending_olc_reqs);
 303         h245_pending_olc_reqs = g_hash_table_new(g_str_hash, g_str_equal);
 304
 305         h223_lc_init();
 306 }
 307
 308 void h245_set_h223_add_lc_handle( h223_add_lc_handle_t handle )
 309 {
 310         h223_add_lc_handle = handle;
 311 }
 312
 313 static const gchar *gen_olc_key(guint16 lc_num, address *dst_addr, address *src_addr)
 314 {
 315   return ep_strdup_printf("%s/%s/%u", ep_address_to_str(dst_addr), ep_address_to_str(src_addr), lc_num);
 316 }
 317
 318 static void update_unicast_addr(unicast_addr_t *req_addr, unicast_addr_t *ack_addr)
 319 {
 320   if (ack_addr->addr.type!=AT_NONE && ack_addr->port!=0) {
 321     memcpy(req_addr->addr_buf, ack_addr->addr_buf, sizeof(req_addr->addr_buf));
 322     SET_ADDRESS(&req_addr->addr, ack_addr->addr.type, ack_addr->addr.len, req_addr->addr_buf);
 323     req_addr->port = ack_addr->port;
 324   }
 325 }
 326
 327 static void h245_setup_channels(packet_info *pinfo, channel_info_t *upcoming_channel)
 328 {
 329         gint *key;
 330         GHashTable *rtp_dyn_payload = NULL;
 331         struct srtp_info *dummy_srtp_info = NULL;
 332
 333         if (!upcoming_channel) return;
 334
 335         /* T.38 */
 336         if (!strcmp(upcoming_channel->data_type_str, "t38fax")) {
 337                 if (upcoming_channel->media_addr.addr.type!=AT_NONE && upcoming_channel->media_addr.port!=0 && t38_handle) {
 338                         t38_add_address(pinfo, &upcoming_channel->media_addr.addr,
 339                                                         upcoming_channel->media_addr.port, 0,
 340                                                         "H245", pinfo->fd->num);
 341                 }
 342                 return;
 343         }
 344
 345         /* (S)RTP, (S)RTCP */
 346         if (upcoming_channel->rfc2198 > 0) {
 347                 rtp_dyn_payload = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
 348                 key = g_malloc(sizeof(gint));
 349                 *key = upcoming_channel->rfc2198;
 350                 g_hash_table_insert(rtp_dyn_payload, key, g_strdup("red"));
 351         }
 352
 353         if (upcoming_channel->srtp_flag) {
 354                 dummy_srtp_info = se_alloc0(sizeof(struct srtp_info));
 355         }
 356
 357         /* DEBUG        g_warning("h245_setup_channels media_addr.addr.type %u port %u",upcoming_channel->media_addr.addr.type, upcoming_channel->media_addr.port );
 358         */
 359         if (upcoming_channel->media_addr.addr.type!=AT_NONE && upcoming_channel->media_addr.port!=0 && rtp_handle) {
 360                 srtp_add_address(pinfo, &upcoming_channel->media_addr.addr,
 361                                                 upcoming_channel->media_addr.port, 0,
 362                                                 "H245", pinfo->fd->num, upcoming_channel->is_video , rtp_dyn_payload, dummy_srtp_info);
 363         }
 364         if (upcoming_channel->media_control_addr.addr.type!=AT_NONE && upcoming_channel->media_control_addr.port!=0 && rtcp_handle) {
 365                 srtcp_add_address(pinfo, &upcoming_channel->media_control_addr.addr,
 366                                                 upcoming_channel->media_control_addr.port, 0,
 367                                                 "H245", pinfo->fd->num, dummy_srtp_info);
 368         }
 369 }
 370
 371 /* Initialize the protocol and registered fields */
 372 int proto_h245 = -1;
 373 #include "packet-h245-hf.c"
 374
 375 /* Initialize the subtree pointers */
 376 static int ett_h245 = -1;
 377 static int ett_h245_returnedFunction = -1;
 378 #include "packet-h245-ett.c"
 379
 380 /* Forward declarations */
 381 static int dissect_h245_MultimediaSystemControlMessage(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_);
 382 static void reset_h245_pi(void *dummy _U_)
 383 {
 384         h245_pi = NULL; /* Make sure we don't leave ep_alloc()ated memory lying around */
 385 }
 386
 387 #include "packet-h245-fn.c"
 388
 389 static void
 390 dissect_h245(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
 391 {
 392         /*
 393          * MultimediaSystemControlMessage_handle is the handle for
 394          * dissect_h245_h245, so we don't want to do any h245_pi or tap stuff here.
 395          */
 396         dissect_tpkt_encap(tvb, pinfo, parent_tree, h245_reassembly, MultimediaSystemControlMessage_handle);
 397 }
 398
 399
 400 static void
 401 dissect_h245_h245(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree)
 402 {
 403         proto_item *it;
 404         proto_tree *tr;
 405         guint32 offset=0;
 406         asn1_ctx_t asn1_ctx;
 407
 408         fast_start = FALSE;
 409         /* Clean up from any previous packet dissection */
 410         upcoming_olc = NULL;
 411         upcoming_channel = NULL;
 412         codec_type = NULL;
 413
 414         if (check_col(pinfo->cinfo, COL_PROTOCOL)){
 415                 col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
 416         }
 417
 418         it=proto_tree_add_protocol_format(parent_tree, proto_h245, tvb, 0, tvb_length(tvb), PSNAME);
 419         tr=proto_item_add_subtree(it, ett_h245);
 420
 421         /* assume that whilst there is more tvb data, there are more h245 commands */
 422         while ( tvb_length_remaining( tvb, offset>>3 )>0 ){
 423                 CLEANUP_PUSH(reset_h245_pi, NULL);
 424                 h245_pi=ep_alloc(sizeof(h245_packet_info));
 425                 init_h245_packet_info(h245_pi);
 426                 asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo);
 427                 offset = dissect_h245_MultimediaSystemControlMessage(tvb, offset, &asn1_ctx, tr, hf_h245_pdu_type);
 428                 tap_queue_packet(h245dg_tap, pinfo, h245_pi);
 429                 offset = (offset+0x07) & 0xfffffff8;
 430                 CLEANUP_CALL_AND_POP;
 431         }
 432 }
 433
 434 void
 435 dissect_h245_FastStart_OLC(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, char *codec_str) {
 436
 437   fast_start = TRUE;
 438   /* Clean up from any previous packet dissection */
 439   upcoming_olc = NULL;
 440   upcoming_channel = NULL;
 441   codec_type = NULL;
 442
 443   dissect_OpenLogicalChannel_PDU(tvb, pinfo, tree);
 444
 445   if (h245_pi != NULL)
 446           h245_pi->msg_type = H245_OpenLogChn;
 447
 448   if (codec_str && codec_type){
 449         g_strlcpy(codec_str, codec_type, 50);
 450   }
 451
 452 }
 453
 454 /*--- proto_register_h245 -------------------------------------------*/
 455 void proto_register_h245(void) {
 456
 457   /* List of fields */
 458   static hf_register_info hf[] = {
 459     { &hf_h245_pdu_type,
 460  { "PDU Type", "h245.pdu_type", FT_UINT32, BASE_DEC,
 461                 VALS(h245_MultimediaSystemControlMessage_vals), 0, "Type of H.245 PDU", HFILL }},
 462         { &hf_h245Manufacturer,
 463                 { "H.245 Manufacturer", "h245.Manufacturer", FT_UINT32, BASE_HEX,
 464                 VALS(H221ManufacturerCode_vals), 0, "h245.H.221 Manufacturer", HFILL }},
 465 #include "packet-h245-hfarr.c"
 466   };
 467
 468   /* List of subtrees */
 469   static gint *ett[] = {
 470           &ett_h245,
 471           &ett_h245_returnedFunction,
 472 #include "packet-h245-ettarr.c"
 473   };
 474   module_t *h245_module;
 475
 476   /* Register protocol */
 477   proto_h245 = proto_register_protocol(PNAME, PSNAME, PFNAME);
 478   register_init_routine(h245_init);
 479   /* Register fields and subtrees */
 480   proto_register_field_array(proto_h245, hf, array_length(hf));
 481   proto_register_subtree_array(ett, array_length(ett));
 482
 483   /* From Ronnie Sahlbergs original H245 dissector */
 484
 485   h245_module = prefs_register_protocol(proto_h245, NULL);
 486   prefs_register_bool_preference(h245_module, "reassembly",
 487                 "Reassemble H.245 messages spanning multiple TCP segments",
 488                 "Whether the H.245 dissector should reassemble messages spanning multiple TCP segments."
 489                 " To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
 490                 &h245_reassembly);
 491   prefs_register_bool_preference(h245_module, "shorttypes",
 492                 "Show short message types",
 493                 "Whether the dissector should show short names or the long names from the standard",
 494                 &h245_shorttypes);
 495   register_dissector("h245dg", dissect_h245_h245, proto_h245);
 496   register_dissector("h245", dissect_h245, proto_h245);
 497
 498   nsp_object_dissector_table = register_dissector_table("h245.nsp.object", "H.245 NonStandardParameter (object)", FT_STRING, BASE_NONE);
 499   nsp_h221_dissector_table = register_dissector_table("h245.nsp.h221", "H.245 NonStandardParameter (h221)", FT_UINT32, BASE_HEX);
 500   gef_name_dissector_table = register_dissector_table("h245.gef.name", "H.245 Generic Extensible Framework (names)", FT_STRING, BASE_NONE);
 501   gef_content_dissector_table = register_dissector_table("h245.gef.content", "H.245 Generic Extensible Framework", FT_STRING, BASE_NONE);
 502
 503   h245_tap = register_tap("h245");
 504   h245dg_tap = register_tap("h245dg");
 505
 506   oid_add_from_string("h239ControlCapability","0.0.8.239.1.1");
 507   oid_add_from_string("h239ExtendedVideoCapability","0.0.8.239.1.2");
 508   oid_add_from_string("generic-message","0.0.8.239.2");
 509   oid_add_from_string("h245 version 3","0.0.8.245.0.3");
 510   oid_add_from_string("h245 version 4","0.0.8.245.0.4");
 511   oid_add_from_string("h245 version 5","0.0.8.245.0.5");
 512   oid_add_from_string("h245 version 6","0.0.8.245.0.6");
 513   oid_add_from_string("h245 version 7","0.0.8.245.0.7");
 514   oid_add_from_string("h245 version 8","0.0.8.245.0.8");
 515   oid_add_from_string("h245 version 9","0.0.8.245.0.9");
 516   oid_add_from_string("h245 version 10","0.0.8.245.0.10");
 517   oid_add_from_string("h245 version 11","0.0.8.245.0.11");
 518   oid_add_from_string("h245 version 12","0.0.8.245.0.12");
 519   oid_add_from_string("h245 version 13","0.0.8.245.0.13");
 520   /* This capability is defined in Annex E. */
 521   oid_add_from_string("ISO/IEC 14496-2 MPEG-4 video","0.0.8.245.1.0.0");
 522   /* This capability is defined in Annex H. */
 523   oid_add_from_string("ISO/IEC 14496-3 MPEG-4 audio","0.0.8.245.1.1.0");
 524   /* This capability is defined in Annex I. */
 525   oid_add_from_string("AMR","0.0.8.245.1.1.1");
 526   /* This capability is defined in Annex J. */
 527   oid_add_from_string("acelp","0.0.8.245.1.1.2");
 528   /* This capability is defined in Annex K. */
 529   oid_add_from_string("us1","0.0.8.245.1.1.3");
 530   /* This capability is defined in Annex L. */
 531   oid_add_from_string("is127evrc","0.0.8.245.1.1.4");
 532   /* This capability is defined in Annex M. */
 533   oid_add_from_string("ISO/IEC 13818-7","0.0.8.245.1.1.5");
 534   /* This capability is defined in Annex N. */
 535   oid_add_from_string("rfc3389","0.0.8.245.1.1.6");
 536   /* This capability is defined in Annex O. */
 537   oid_add_from_string("L-16","0.0.8.245.1.1.7");
 538   /* This capability is defined in Annex P. */
 539   oid_add_from_string("bounded-audio-stream","0.0.8.245.1.1.8");
 540   /* This capability is defined in Annex R. */
 541   oid_add_from_string("AMR-NB","0.0.8.245.1.1.9");
 542   /* This capability is defined in Annex R. */
 543   oid_add_from_string("AMR-WB","0.0.8.245.1.1.10");
 544   /* This capability is defined in Annex S. */
 545   oid_add_from_string("ilbc","0.0.8.245.1.1.11");
 546
 547   oid_add_from_string("ISO/IEC 14496-1","0.0.8.245.1.2.0");
 548   oid_add_from_string("Nx64","0.0.8.245.1.2.1");
 549   oid_add_from_string("logical-channel-bit-ratemanagement","0.0.8.245.1.3.0");
 550
 551   oid_add_from_string("h264 generic-capabilities","0.0.8.241.0.0.1");
 552   oid_add_from_string("iPpacketization_h241AnnexA(single NAL unit mode)","0.0.8.241.0.0.0.0");
 553   oid_add_from_string("iPpacketization_RFC3984NonInterleaved","0.0.8.241.0.0.0.1");
 554   oid_add_from_string("iPpacketization_RFC3984Interleaved","0.0.8.241.0.0.0.2");
 555 }
 556
 557
 558 /*--- proto_reg_handoff_h245 ---------------------------------------*/
 559 void proto_reg_handoff_h245(void) {
 560         dissector_handle_t h245_handle;
 561
 562         rtp_handle = find_dissector("rtp");
 563         rtcp_handle = find_dissector("rtcp");
 564         t38_handle = find_dissector("t38");
 565         data_handle = find_dissector("data");
 566         h263_handle = find_dissector("h263data");
 567         amr_handle = find_dissector("amr_if2_nb");
 568
 569
 570         h245_handle = find_dissector("h245");
 571         dissector_add_handle("tcp.port", h245_handle);
 572         MultimediaSystemControlMessage_handle = find_dissector("h245dg");
 573         dissector_add_handle("udp.port", MultimediaSystemControlMessage_handle);
 574 }
 575
 576 static void init_h245_packet_info(h245_packet_info *pi)
 577 {
 578         if(pi == NULL) {
 579                 return;
 580         }
 581
 582         pi->msg_type = H245_OTHER;
 583                 pi->frame_label[0] = '\0';
 584                 g_snprintf(pi->comment, sizeof(pi->comment), "H245 ");
 585 }
 586