git.sesse.net Git - vlc/blob - modules/stream_out/rtsp.c

   1 /*****************************************************************************
   2  * rtsp.c: RTSP support for RTP stream output module
   3  *****************************************************************************
   4  * Copyright (C) 2003-2004 the VideoLAN team
   5  * Copyright © 2007 Rémi Denis-Courmont
   6  *
   7  * $Id: rtp.c 21407 2007-08-22 20:10:41Z courmisch $
   8  *
   9  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 /*****************************************************************************
  27  * Preamble
  28  *****************************************************************************/
  29 #include <vlc/vlc.h>
  30 #include <vlc_sout.h>
  31
  32 #include <vlc_httpd.h>
  33 #include <vlc_url.h>
  34 #include <vlc_network.h>
  35 #include <assert.h>
  36 #include <errno.h>
  37 #include <stdlib.h>
  38
  39 #include "rtp.h"
  40
  41 typedef struct rtsp_session_t rtsp_session_t;
  42
  43 struct rtsp_stream_t
  44 {
  45     vlc_mutex_t     lock;
  46     sout_stream_t  *owner;
  47     httpd_host_t   *host;
  48     httpd_url_t    *url;
  49     char           *psz_path;
  50     unsigned        port;
  51
  52     int             sessionc;
  53     rtsp_session_t **sessionv;
  54 };
  55
  56
  57 static int  RtspCallback( httpd_callback_sys_t *p_args,
  58                           httpd_client_t *cl, httpd_message_t *answer,
  59                           const httpd_message_t *query );
  60 static int  RtspCallbackId( httpd_callback_sys_t *p_args,
  61                             httpd_client_t *cl, httpd_message_t *answer,
  62                             const httpd_message_t *query );
  63 static void RtspClientDel( rtsp_stream_t *rtsp, rtsp_session_t *session );
  64
  65 rtsp_stream_t *RtspSetup( sout_stream_t *p_stream, const vlc_url_t *url )
  66 {
  67     rtsp_stream_t *rtsp = malloc( sizeof( *rtsp ) );
  68
  69     if( rtsp == NULL || ( url->i_port > 99999 ) )
  70         return NULL;
  71
  72     rtsp->owner = p_stream;
  73     rtsp->sessionc = 0;
  74     rtsp->sessionv = NULL;
  75     vlc_mutex_init( p_stream, &rtsp->lock );
  76
  77     msg_Dbg( p_stream, "rtsp setup: %s : %d / %s\n",
  78              url->psz_host, url->i_port, url->psz_path );
  79
  80     rtsp->port = (url->i_port > 0) ? url->i_port : 554;
  81     if( url->psz_path != NULL )
  82         rtsp->psz_path = strdup( url->psz_path + 1 );
  83     else
  84         rtsp->psz_path = NULL;
  85
  86 #if 0
  87     if( asprintf( &rtsp->psz_control, "rtsp://%s:%d%s",
  88                   url->psz_host,  url->i_port > 0 ? url->i_port : 554,
  89                   rtsp->psz_path ) == -1 )
  90     {
  91         rtsp->psz_control = NULL;
  92         goto error;
  93     }
  94 #endif
  95
  96     rtsp->host = httpd_HostNew( VLC_OBJECT(p_stream), url->psz_host,
  97                                 rtsp->port );
  98     if( rtsp->host == NULL )
  99         goto error;
 100
 101     rtsp->url = httpd_UrlNewUnique( rtsp->host,
 102                                     url->psz_path ? url->psz_path : "/", NULL,
 103                                     NULL, NULL );
 104     if( rtsp->url == NULL )
 105         goto error;
 106
 107     httpd_UrlCatch( rtsp->url, HTTPD_MSG_DESCRIBE, RtspCallback, (void*)rtsp );
 108     httpd_UrlCatch( rtsp->url, HTTPD_MSG_SETUP,    RtspCallback, (void*)rtsp );
 109     httpd_UrlCatch( rtsp->url, HTTPD_MSG_PLAY,     RtspCallback, (void*)rtsp );
 110     httpd_UrlCatch( rtsp->url, HTTPD_MSG_PAUSE,    RtspCallback, (void*)rtsp );
 111     httpd_UrlCatch( rtsp->url, HTTPD_MSG_TEARDOWN, RtspCallback, (void*)rtsp );
 112     return rtsp;
 113
 114 error:
 115     RtspUnsetup( rtsp );
 116     return NULL;
 117 }
 118
 119
 120 void RtspUnsetup( rtsp_stream_t *rtsp )
 121 {
 122     while( rtsp->sessionc > 0 )
 123         RtspClientDel( rtsp, rtsp->sessionv[0] );
 124
 125     if( rtsp->url )
 126         httpd_UrlDelete( rtsp->url );
 127
 128     if( rtsp->host )
 129         httpd_HostDelete( rtsp->host );
 130
 131     vlc_mutex_destroy( &rtsp->lock );
 132 }
 133
 134
 135 struct rtsp_stream_id_t
 136 {
 137     rtsp_stream_t    *stream;
 138     sout_stream_id_t *sout_id;
 139     httpd_url_t      *url;
 140     const char       *dst;
 141     int               ttl;
 142     unsigned          loport, hiport;
 143 };
 144
 145
 146 typedef struct rtsp_strack_t rtsp_strack_t;
 147
 148 /* For unicast streaming */
 149 struct rtsp_session_t
 150 {
 151     rtsp_stream_t *stream;
 152     uint64_t       id;
 153
 154     /* output (id-access) */
 155     int            trackc;
 156     rtsp_strack_t *trackv;
 157 };
 158
 159
 160 /* Unicast session track */
 161 struct rtsp_strack_t
 162 {
 163     sout_stream_id_t  *id;
 164     sout_access_out_t *access;
 165     vlc_bool_t         playing;
 166 };
 167
 168
 169 rtsp_stream_id_t *RtspAddId( rtsp_stream_t *rtsp, sout_stream_id_t *sid,
 170                              unsigned num,
 171                              /* Multicast stuff - TODO: cleanup */
 172                              const char *dst, int ttl,
 173                              unsigned loport, unsigned hiport )
 174 {
 175     char urlbuf[sizeof( "//trackID=123" ) + strlen( rtsp->psz_path )];
 176     rtsp_stream_id_t *id = malloc( sizeof( *id ) );
 177     httpd_url_t *url;
 178
 179     if( id == NULL )
 180         return NULL;
 181
 182     id->stream = rtsp;
 183     id->sout_id = sid;
 184     /* TODO: can we assume that this need not be strdup'd? */
 185     id->dst = dst;
 186     if( id->dst != NULL )
 187     {
 188         id->ttl = ttl;
 189         id->loport = loport;
 190         id->hiport = hiport;
 191     }
 192
 193     snprintf( urlbuf, sizeof( urlbuf ), "/%s/trackID=%u", rtsp->psz_path,
 194               num );
 195     msg_Dbg( rtsp->owner, "RTSP: adding %s\n", urlbuf );
 196     url = id->url = httpd_UrlNewUnique( rtsp->host, urlbuf, NULL, NULL, NULL );
 197
 198     if( url == NULL )
 199     {
 200         free( id );
 201         return NULL;
 202     }
 203
 204     httpd_UrlCatch( url, HTTPD_MSG_DESCRIBE, RtspCallbackId, (void *)id );
 205     httpd_UrlCatch( url, HTTPD_MSG_SETUP,    RtspCallbackId, (void *)id );
 206     httpd_UrlCatch( url, HTTPD_MSG_PLAY,     RtspCallbackId, (void *)id );
 207     httpd_UrlCatch( url, HTTPD_MSG_PAUSE,    RtspCallbackId, (void *)id );
 208     httpd_UrlCatch( url, HTTPD_MSG_TEARDOWN, RtspCallbackId, (void *)id );
 209
 210     return id;
 211 }
 212
 213
 214 void RtspDelId( rtsp_stream_t *rtsp, rtsp_stream_id_t *id )
 215 {
 216     vlc_mutex_lock( &rtsp->lock );
 217     for( int i = 0; i < rtsp->sessionc; i++ )
 218     {
 219         rtsp_session_t *ses = rtsp->sessionv[i];
 220
 221         for( int j = 0; j < ses->trackc; j++ )
 222         {
 223             if( ses->trackv[j].id == id->sout_id )
 224             {
 225                 rtsp_strack_t *tr = ses->trackv + j;
 226                 sout_AccessOutDelete( tr->access );
 227                 REMOVE_ELEM( ses->trackv, ses->trackc, j );
 228                 /* FIXME: are we supposed to notify the client? */
 229             }
 230         }
 231     }
 232
 233     vlc_mutex_unlock( &rtsp->lock );
 234     httpd_UrlDelete( id->url );
 235     free( id );
 236 }
 237
 238
 239 /** rtsp must be locked */
 240 static
 241 rtsp_session_t *RtspClientNew( rtsp_stream_t *rtsp )
 242 {
 243     rtsp_session_t *s = malloc( sizeof( *s ) );
 244     if( s == NULL )
 245         return NULL;
 246
 247     s->stream = rtsp;
 248     s->id = rand(); /* FIXME: not enough entropy */
 249     s->trackc = 0;
 250     s->trackv = NULL;
 251
 252     TAB_APPEND( rtsp->sessionc, rtsp->sessionv, s );
 253
 254     return s;
 255 }
 256
 257
 258 /** rtsp must be locked */
 259 static
 260 rtsp_session_t *RtspClientGet( rtsp_stream_t *rtsp, const char *name )
 261 {
 262     char *end;
 263     uint64_t id;
 264     int i;
 265
 266     if( name == NULL )
 267         return NULL;
 268
 269     errno = 0;
 270     id = strtoull( name, &end, 0x10 );
 271     if( errno || *end )
 272         return NULL;
 273
 274     /* FIXME: use a hash/dictionary */
 275     for( i = 0; i < rtsp->sessionc; i++ )
 276     {
 277         if( rtsp->sessionv[i]->id == id )
 278             return rtsp->sessionv[i];
 279     }
 280     return NULL;
 281 }
 282
 283
 284 /** rtsp must be locked */
 285 static
 286 void RtspClientDel( rtsp_stream_t *rtsp, rtsp_session_t *session )
 287 {
 288     int i;
 289     TAB_REMOVE( rtsp->sessionc, rtsp->sessionv, session );
 290
 291     for( i = 0; i < session->trackc; i++ )
 292     {
 293         rtp_del_sink( session->trackv[i].id, session->trackv[i].access );
 294         sout_AccessOutDelete( session->trackv[i].access );
 295     }
 296
 297     free( session->trackv );
 298     free( session );
 299 }
 300
 301
 302 /** Aggregate RTSP callback */
 303 static int RtspCallback( httpd_callback_sys_t *p_args,
 304                          httpd_client_t *cl,
 305                          httpd_message_t *answer,
 306                          const httpd_message_t *query )
 307 {
 308     rtsp_stream_t *rtsp = (rtsp_stream_t *)p_args;
 309     const char *psz_session = NULL, *psz;
 310
 311     if( answer == NULL || query == NULL )
 312     {
 313         return VLC_SUCCESS;
 314     }
 315
 316     answer->i_proto = HTTPD_PROTO_RTSP;
 317     answer->i_version= query->i_version;
 318     answer->i_type   = HTTPD_MSG_ANSWER;
 319     answer->i_body = 0;
 320     answer->p_body = NULL;
 321
 322     if( httpd_MsgGet( query, "Require" ) != NULL )
 323     {
 324         answer->i_status = 551;
 325         httpd_MsgAdd( answer, "Unsupported", "%s",
 326                       httpd_MsgGet( query, "Require" ) );
 327     }
 328     else
 329     switch( query->i_type )
 330     {
 331         case HTTPD_MSG_DESCRIBE:
 332         {
 333             char ip[NI_MAXNUMERICHOST], *ptr;
 334             char control[sizeof("rtsp://[]:12345/") + sizeof( ip )
 335                             + strlen( rtsp->psz_path )];
 336
 337             /* Build self-referential URL */
 338             httpd_ServerIP( cl, ip );
 339             ptr = strchr( ip, '%' );
 340             if( ptr != NULL )
 341                 *ptr = '\0';
 342
 343             if( strchr( ip, ':' ) != NULL )
 344                 sprintf( control, "rtsp://[%s]:%u/%s", ip, rtsp->port,
 345                          ( rtsp->psz_path != NULL ) ? rtsp->psz_path : "" );
 346             else
 347                 sprintf( control, "rtsp://%s:%u/%s", ip, rtsp->port,
 348                          ( rtsp->psz_path != NULL ) ? rtsp->psz_path : "" );
 349
 350             ptr = SDPGenerate( rtsp->owner, control );
 351
 352             answer->i_status = 200;
 353             httpd_MsgAdd( answer, "Content-Type",  "%s", "application/sdp" );
 354             httpd_MsgAdd( answer, "Content-Base",  "%s", control );
 355             answer->p_body = (uint8_t *)ptr;
 356             answer->i_body = strlen( ptr );
 357             break;
 358         }
 359
 360         case HTTPD_MSG_SETUP:
 361             answer->i_status = 459;
 362             break;
 363
 364         case HTTPD_MSG_PLAY:
 365         {
 366             rtsp_session_t *ses;
 367             answer->i_status = 200;
 368
 369             psz_session = httpd_MsgGet( query, "Session" );
 370             if( httpd_MsgGet( query, "Range" ) != NULL )
 371             {
 372                 answer->i_status = 456; /* cannot seek */
 373                 break;
 374             }
 375
 376             vlc_mutex_lock( &rtsp->lock );
 377             ses = RtspClientGet( rtsp, psz_session );
 378             if( ses != NULL )
 379             {
 380                 for( int i = 0; i < ses->trackc; i++ )
 381                 {
 382                     rtsp_strack_t *tr = ses->trackv + i;
 383                     if( !tr->playing )
 384                     {
 385                         tr->playing = VLC_TRUE;
 386                         rtp_add_sink( tr->id, tr->access );
 387                     }
 388                 }
 389             }
 390             vlc_mutex_unlock( &rtsp->lock );
 391
 392             if( httpd_MsgGet( query, "Scale" ) != NULL )
 393                 httpd_MsgAdd( answer, "Scale", "1." );
 394             break;
 395         }
 396
 397         case HTTPD_MSG_PAUSE:
 398             answer->i_status = 405;
 399             httpd_MsgAdd( answer, "Allow", "DESCRIBE, PLAY, TEARDOWN" );
 400             break;
 401
 402         case HTTPD_MSG_TEARDOWN:
 403         {
 404             rtsp_session_t *ses;
 405
 406             /* for now only multicast so easy again */
 407             answer->i_status = 200;
 408
 409             psz_session = httpd_MsgGet( query, "Session" );
 410
 411             vlc_mutex_lock( &rtsp->lock );
 412             ses = RtspClientGet( rtsp, psz_session );
 413             if( ses != NULL )
 414                 RtspClientDel( rtsp, ses );
 415             vlc_mutex_unlock( &rtsp->lock );
 416             break;
 417         }
 418
 419         default:
 420             return VLC_EGENERIC;
 421     }
 422
 423     httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
 424     httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
 425
 426     psz = httpd_MsgGet( query, "Cseq" );
 427     if( psz != NULL )
 428         httpd_MsgAdd( answer, "Cseq", "%s", psz );
 429     psz = httpd_MsgGet( query, "Timestamp" );
 430     if( psz != NULL )
 431         httpd_MsgAdd( answer, "Timestamp", "%s", psz );
 432
 433     httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
 434
 435     if( psz_session )
 436         httpd_MsgAdd( answer, "Session", "%s;timeout=5", psz_session );
 437     return VLC_SUCCESS;
 438 }
 439
 440
 441 /** Finds the next transport choice */
 442 static inline const char *transport_next( const char *str )
 443 {
 444     /* Looks for comma */
 445     str = strchr( str, ',' );
 446     if( str == NULL )
 447         return NULL; /* No more transport options */
 448
 449     str++; /* skips comma */
 450     while( strchr( "\r\n\t ", *str ) )
 451         str++;
 452
 453     return (*str) ? str : NULL;
 454 }
 455
 456
 457 /** Finds the next transport parameter */
 458 static inline const char *parameter_next( const char *str )
 459 {
 460     while( strchr( ",;", *str ) == NULL )
 461         str++;
 462
 463     return (*str == ';') ? (str + 1) : NULL;
 464 }
 465
 466
 467 /** Non-aggregate RTSP callback */
 468 static int RtspCallbackId( httpd_callback_sys_t *p_args,
 469                            httpd_client_t *cl,
 470                            httpd_message_t *answer,
 471                            const httpd_message_t *query )
 472 {
 473     rtsp_stream_id_t *id = (rtsp_stream_id_t *)p_args;
 474     rtsp_stream_t    *rtsp = id->stream;
 475     sout_stream_t    *p_stream = id->stream->owner;
 476     char psz_sesbuf[17];
 477     const char *psz_session, *psz;
 478
 479     if( answer == NULL || query == NULL )
 480         return VLC_SUCCESS;
 481
 482     /* */
 483     answer->i_proto = HTTPD_PROTO_RTSP;
 484     answer->i_version= query->i_version;
 485     answer->i_type   = HTTPD_MSG_ANSWER;
 486     answer->i_body = 0;
 487     answer->p_body = NULL;
 488
 489     psz_session = httpd_MsgGet( query, "Session" );
 490
 491     if( httpd_MsgGet( query, "Require" ) != NULL )
 492     {
 493         answer->i_status = 551;
 494         httpd_MsgAdd( answer, "Unsupported", "%s",
 495                       httpd_MsgGet( query, "Require" ) );
 496     }
 497     else
 498     switch( query->i_type )
 499     {
 500         case HTTPD_MSG_SETUP:
 501         {
 502             answer->i_status = 461;
 503
 504             for( const char *tpt = httpd_MsgGet( query, "Transport" );
 505                  tpt != NULL;
 506                  tpt = transport_next( tpt ) )
 507             {
 508                 vlc_bool_t b_multicast = VLC_TRUE, b_unsupp = VLC_FALSE;
 509                 unsigned loport = 5004, hiport = 5005; /* from RFC3551 */
 510
 511                 /* Check transport protocol. */
 512                 /* Currently, we only support RTP/AVP over UDP */
 513                 if( strncmp( tpt, "RTP/AVP", 7 ) )
 514                     continue;
 515                 tpt += 7;
 516                 if( strncmp( tpt, "/UDP", 4 ) == 0 )
 517                     tpt += 4;
 518                 if( strchr( ";,", *tpt ) == NULL )
 519                     continue;
 520
 521                 /* Parse transport options */
 522                 for( const char *opt = parameter_next( tpt );
 523                      opt != NULL;
 524                      opt = parameter_next( opt ) )
 525                 {
 526                     if( strncmp( opt, "multicast", 9 ) == 0)
 527                         b_multicast = VLC_TRUE;
 528                     else
 529                     if( strncmp( opt, "unicast", 7 ) == 0 )
 530                         b_multicast = VLC_FALSE;
 531                     else
 532                     if( sscanf( opt, "client_port=%u-%u", &loport, &hiport ) == 2 )
 533                         ;
 534                     else
 535                     if( strncmp( opt, "mode=", 5 ) == 0 )
 536                     {
 537                         if( strncasecmp( opt + 5, "play", 4 )
 538                          && strncasecmp( opt + 5, "\"PLAY\"", 6 ) )
 539                         {
 540                             /* Not playing?! */
 541                             b_unsupp = VLC_TRUE;
 542                             break;
 543                         }
 544                     }
 545                     else
 546                     if( strncmp( opt,"destination=", 12 ) == 0 )
 547                     {
 548                         answer->i_status = 403;
 549                         b_unsupp = VLC_TRUE;
 550                     }
 551                     else
 552                     {
 553                     /*
 554                      * Every other option is unsupported:
 555                      *
 556                      * "source" and "append" are invalid (server-only);
 557                      * "ssrc" also (as clarified per RFC2326bis).
 558                      *
 559                      * For multicast, "port", "layers", "ttl" are set by the
 560                      * stream output configuration.
 561                      *
 562                      * For unicast, we want to decide "server_port" values.
 563                      *
 564                      * "interleaved" is not implemented.
 565                      */
 566                         b_unsupp = VLC_TRUE;
 567                         break;
 568                     }
 569                 }
 570
 571                 if( b_unsupp )
 572                     continue;
 573
 574                 if( b_multicast )
 575                 {
 576                     const char *dst = id->dst;
 577                     if( dst == NULL )
 578                         continue;
 579
 580                     answer->i_status = 200;
 581
 582                     httpd_MsgAdd( answer, "Transport",
 583                                   "RTP/AVP/UDP;destination=%s;port=%u-%u;"
 584                                   "ttl=%d;mode=play",
 585                                   dst, id->loport, id->hiport,
 586                                   ( id->ttl > 0 ) ? id->ttl : 1 );
 587                 }
 588                 else
 589                 {
 590                     char ip[NI_MAXNUMERICHOST], url[NI_MAXNUMERICHOST + 8];
 591                     static const char access[] = "udp{raw,rtcp}";
 592                     rtsp_session_t *ses = NULL;
 593                     rtsp_strack_t track = { id->sout_id, NULL, VLC_FALSE };
 594
 595                     if( httpd_ClientIP( cl, ip ) == NULL )
 596                     {
 597                         answer->i_status = 500;
 598                         continue;
 599                     }
 600
 601                     snprintf( url, sizeof( url ),
 602                               ( strchr( ip, ':' ) != NULL ) ? "[%s]:%d" : "%s:%d",
 603                               ip, loport );
 604
 605                     track.access = sout_AccessOutNew( p_stream->p_sout,
 606                                                       access, url );
 607                     if( track.access == NULL )
 608                     {
 609                         msg_Err( p_stream,
 610                                  "cannot create access output for %s://%s",
 611                                  access, url );
 612                         answer->i_status = 500;
 613                         continue;
 614                     }
 615
 616                     char *src = var_GetNonEmptyString( track.access, "src-addr" );
 617                     int sport = var_GetInteger( track.access, "src-port" );
 618
 619                     vlc_mutex_lock( &rtsp->lock );
 620                     if( psz_session == NULL )
 621                     {
 622                         ses = RtspClientNew( rtsp );
 623                         snprintf( psz_sesbuf, sizeof( psz_sesbuf ), I64Fx,
 624                                   ses->id );
 625                         psz_session = psz_sesbuf;
 626                     }
 627                     else
 628                     {
 629                         /* FIXME: we probably need to remove an access out,
 630                          * if there is already one for the same ID */
 631                         ses = RtspClientGet( rtsp, psz_session );
 632                         if( ses == NULL )
 633                         {
 634                             answer->i_status = 454;
 635                             vlc_mutex_unlock( &rtsp->lock );
 636                             continue;
 637                         }
 638                     }
 639
 640                     INSERT_ELEM( ses->trackv, ses->trackc, ses->trackc, track );
 641                     vlc_mutex_unlock( &rtsp->lock );
 642
 643                     httpd_ServerIP( cl, ip );
 644
 645                     if( ( src != NULL ) && strcmp( src, ip ) )
 646                     {
 647                         /* Specify source IP if it is different from the RTSP
 648                          * control connection server address */
 649                         char *ptr = strchr( src, '%' );
 650                         if( ptr != NULL ) *ptr = '\0'; /* remove scope ID */
 651
 652                         httpd_MsgAdd( answer, "Transport",
 653                                       "RTP/AVP/UDP;unicast;source=%s;"
 654                                       "client_port=%u-%u;server_port=%u-%u;"
 655                                       "mode=play",
 656                                       src, loport, loport + 1, sport, sport + 1 );
 657                     }
 658                     else
 659                     {
 660                         httpd_MsgAdd( answer, "Transport",
 661                                       "RTP/AVP/UDP;unicast;"
 662                                       "client_port=%u-%u;server_port=%u-%u;"
 663                                       "mode=play",
 664                                       loport, loport + 1, sport, sport + 1 );
 665                     }
 666
 667                     answer->i_status = 200;
 668                     free( src );
 669                 }
 670                 break;
 671             }
 672             break;
 673         }
 674
 675         case HTTPD_MSG_PLAY:
 676         {
 677             rtsp_session_t *ses;
 678             answer->i_status = 200;
 679
 680             psz_session = httpd_MsgGet( query, "Session" );
 681             if( httpd_MsgGet( query, "Range" ) != NULL )
 682             {
 683                 answer->i_status = 456; /* cannot seek */
 684                 break;
 685             }
 686
 687             vlc_mutex_lock( &rtsp->lock );
 688             ses = RtspClientGet( rtsp, psz_session );
 689             if( ses != NULL )
 690             {
 691                 for( int i = 0; i < ses->trackc; i++ )
 692                 {
 693                     rtsp_strack_t *tr = ses->trackv + i;
 694                     if( !tr->playing && ( tr->id == id->sout_id ) )
 695                     {
 696                         tr->playing = VLC_TRUE;
 697                         rtp_add_sink( tr->id, tr->access );
 698                     }
 699                 }
 700             }
 701             vlc_mutex_unlock( &rtsp->lock );
 702
 703             if( httpd_MsgGet( query, "Scale" ) != NULL )
 704                 httpd_MsgAdd( answer, "Scale", "1." );
 705             break;
 706         }
 707
 708         case HTTPD_MSG_PAUSE:
 709             answer->i_status = 405;
 710             httpd_MsgAdd( answer, "Allow", "SETUP, PLAY, TEARDOWN" );
 711             break;
 712
 713         case HTTPD_MSG_TEARDOWN:
 714         {
 715             rtsp_session_t *ses;
 716
 717             answer->i_status = 200;
 718
 719             psz_session = httpd_MsgGet( query, "Session" );
 720
 721             vlc_mutex_lock( &rtsp->lock );
 722             ses = RtspClientGet( rtsp, psz_session );
 723             if( ses != NULL )
 724             {
 725                 for( int i = 0; i < ses->trackc; i++ )
 726                 {
 727                     if( ses->trackv[i].id == id->sout_id )
 728                     {
 729                         rtp_del_sink( id->sout_id, ses->trackv[i].access );
 730                         sout_AccessOutDelete( ses->trackv[i].access );
 731                         REMOVE_ELEM( ses->trackv, ses->trackc, i );
 732                     }
 733                 }
 734             }
 735             vlc_mutex_unlock( &rtsp->lock );
 736             break;
 737         }
 738
 739         default:
 740             answer->i_status = 460;
 741             break;
 742     }
 743
 744     psz = httpd_MsgGet( query, "Cseq" );
 745     if( psz != NULL )
 746         httpd_MsgAdd( answer, "Cseq", "%s", psz );
 747     psz = httpd_MsgGet( query, "Timestamp" );
 748     if( psz != NULL )
 749         httpd_MsgAdd( answer, "Timestamp", "%s", psz );
 750     httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
 751     httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
 752     httpd_MsgAdd( answer, "Cache-Control", "%s", "no-cache" );
 753
 754     if( psz_session )
 755         httpd_MsgAdd( answer, "Session", "%s"/*;timeout=5*/, psz_session );
 756     return VLC_SUCCESS;
 757 }