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  * $Id$
   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 #ifdef HAVE_CONFIG_H
  30 # include "config.h"
  31 #endif
  32
  33 #include <vlc_common.h>
  34 #include <vlc_sout.h>
  35
  36 #include <vlc_httpd.h>
  37 #include <vlc_url.h>
  38 #include <vlc_network.h>
  39 #include <vlc_rand.h>
  40 #include <assert.h>
  41 #include <errno.h>
  42 #include <stdlib.h>
  43
  44 #include "rtp.h"
  45
  46 typedef struct rtsp_session_t rtsp_session_t;
  47
  48 struct rtsp_stream_t
  49 {
  50     vlc_mutex_t     lock;
  51     sout_stream_t  *owner;
  52     httpd_host_t   *host;
  53     httpd_url_t    *url;
  54     char           *psz_path;
  55     const char     *track_fmt;
  56     unsigned        port;
  57
  58     int             sessionc;
  59     rtsp_session_t **sessionv;
  60 };
  61
  62
  63 static int  RtspCallback( httpd_callback_sys_t *p_args,
  64                           httpd_client_t *cl, httpd_message_t *answer,
  65                           const httpd_message_t *query );
  66 static int  RtspCallbackId( httpd_callback_sys_t *p_args,
  67                             httpd_client_t *cl, httpd_message_t *answer,
  68                             const httpd_message_t *query );
  69 static void RtspClientDel( rtsp_stream_t *rtsp, rtsp_session_t *session );
  70
  71 rtsp_stream_t *RtspSetup( sout_stream_t *p_stream, const vlc_url_t *url )
  72 {
  73     rtsp_stream_t *rtsp = malloc( sizeof( *rtsp ) );
  74
  75     if( rtsp == NULL || ( url->i_port > 99999 ) )
  76     {
  77         free( rtsp );
  78         return NULL;
  79     }
  80
  81     rtsp->owner = p_stream;
  82     rtsp->sessionc = 0;
  83     rtsp->sessionv = NULL;
  84     rtsp->host = NULL;
  85     rtsp->url = NULL;
  86     rtsp->psz_path = NULL;
  87     vlc_mutex_init( &rtsp->lock );
  88
  89     rtsp->port = (url->i_port > 0) ? url->i_port : 554;
  90     rtsp->psz_path = strdup( ( url->psz_path != NULL ) ? url->psz_path : "/" );
  91     if( rtsp->psz_path == NULL )
  92         goto error;
  93
  94     assert( strlen( rtsp->psz_path ) > 0 );
  95     if( rtsp->psz_path[strlen( rtsp->psz_path ) - 1] == '/' )
  96         rtsp->track_fmt = "%strackID=%u";
  97     else
  98         rtsp->track_fmt = "%s/trackID=%u";
  99
 100     msg_Dbg( p_stream, "RTSP stream: host %s port %d at %s",
 101              url->psz_host, rtsp->port, rtsp->psz_path );
 102
 103     rtsp->host = httpd_HostNew( VLC_OBJECT(p_stream), url->psz_host,
 104                                 rtsp->port );
 105     if( rtsp->host == NULL )
 106         goto error;
 107
 108     rtsp->url = httpd_UrlNewUnique( rtsp->host, rtsp->psz_path,
 109                                     NULL, NULL, NULL );
 110     if( rtsp->url == NULL )
 111         goto error;
 112
 113     httpd_UrlCatch( rtsp->url, HTTPD_MSG_DESCRIBE, RtspCallback, (void*)rtsp );
 114     httpd_UrlCatch( rtsp->url, HTTPD_MSG_SETUP,    RtspCallback, (void*)rtsp );
 115     httpd_UrlCatch( rtsp->url, HTTPD_MSG_PLAY,     RtspCallback, (void*)rtsp );
 116     httpd_UrlCatch( rtsp->url, HTTPD_MSG_PAUSE,    RtspCallback, (void*)rtsp );
 117     httpd_UrlCatch( rtsp->url, HTTPD_MSG_GETPARAMETER, RtspCallback,
 118                     (void*)rtsp );
 119     httpd_UrlCatch( rtsp->url, HTTPD_MSG_TEARDOWN, RtspCallback, (void*)rtsp );
 120     return rtsp;
 121
 122 error:
 123     RtspUnsetup( rtsp );
 124     return NULL;
 125 }
 126
 127
 128 void RtspUnsetup( rtsp_stream_t *rtsp )
 129 {
 130     while( rtsp->sessionc > 0 )
 131         RtspClientDel( rtsp, rtsp->sessionv[0] );
 132
 133     if( rtsp->url )
 134         httpd_UrlDelete( rtsp->url );
 135
 136     if( rtsp->host )
 137         httpd_HostDelete( rtsp->host );
 138
 139     free( rtsp->psz_path );
 140     vlc_mutex_destroy( &rtsp->lock );
 141 }
 142
 143
 144 struct rtsp_stream_id_t
 145 {
 146     rtsp_stream_t    *stream;
 147     sout_stream_id_t *sout_id;
 148     httpd_url_t      *url;
 149     const char       *dst;
 150     int               ttl;
 151     uint32_t          ssrc;
 152     uint16_t          loport, hiport;
 153 };
 154
 155
 156 typedef struct rtsp_strack_t rtsp_strack_t;
 157
 158 /* For unicast streaming */
 159 struct rtsp_session_t
 160 {
 161     rtsp_stream_t *stream;
 162     uint64_t       id;
 163
 164     /* output (id-access) */
 165     int            trackc;
 166     rtsp_strack_t *trackv;
 167 };
 168
 169
 170 /* Unicast session track */
 171 struct rtsp_strack_t
 172 {
 173     sout_stream_id_t  *id;
 174     int                fd;
 175     bool         playing;
 176 };
 177
 178
 179 rtsp_stream_id_t *RtspAddId( rtsp_stream_t *rtsp, sout_stream_id_t *sid,
 180                              unsigned num, uint32_t ssrc,
 181                              /* Multicast stuff - TODO: cleanup */
 182                              const char *dst, int ttl,
 183                              unsigned loport, unsigned hiport )
 184 {
 185     char urlbuf[sizeof( "/trackID=123" ) + strlen( rtsp->psz_path )];
 186     rtsp_stream_id_t *id = malloc( sizeof( *id ) );
 187     httpd_url_t *url;
 188
 189     if( id == NULL )
 190         return NULL;
 191
 192     id->stream = rtsp;
 193     id->sout_id = sid;
 194     id->ssrc = ssrc;
 195     /* TODO: can we assume that this need not be strdup'd? */
 196     id->dst = dst;
 197     if( id->dst != NULL )
 198     {
 199         id->ttl = ttl;
 200         id->loport = loport;
 201         id->hiport = hiport;
 202     }
 203
 204     /* FIXME: num screws up if any ES has been removed and re-added */
 205     snprintf( urlbuf, sizeof( urlbuf ), rtsp->track_fmt, rtsp->psz_path,
 206               num );
 207     msg_Dbg( rtsp->owner, "RTSP: adding %s", urlbuf );
 208     url = id->url = httpd_UrlNewUnique( rtsp->host, urlbuf, NULL, NULL, NULL );
 209
 210     if( url == NULL )
 211     {
 212         free( id );
 213         return NULL;
 214     }
 215
 216     httpd_UrlCatch( url, HTTPD_MSG_DESCRIBE, RtspCallbackId, (void *)id );
 217     httpd_UrlCatch( url, HTTPD_MSG_SETUP,    RtspCallbackId, (void *)id );
 218     httpd_UrlCatch( url, HTTPD_MSG_PLAY,     RtspCallbackId, (void *)id );
 219     httpd_UrlCatch( url, HTTPD_MSG_PAUSE,    RtspCallbackId, (void *)id );
 220     httpd_UrlCatch( url, HTTPD_MSG_GETPARAMETER, RtspCallbackId, (void *)id );
 221     httpd_UrlCatch( url, HTTPD_MSG_TEARDOWN, RtspCallbackId, (void *)id );
 222
 223     return id;
 224 }
 225
 226
 227 void RtspDelId( rtsp_stream_t *rtsp, rtsp_stream_id_t *id )
 228 {
 229     vlc_mutex_lock( &rtsp->lock );
 230     for( int i = 0; i < rtsp->sessionc; i++ )
 231     {
 232         rtsp_session_t *ses = rtsp->sessionv[i];
 233
 234         for( int j = 0; j < ses->trackc; j++ )
 235         {
 236             if( ses->trackv[j].id == id->sout_id )
 237             {
 238                 rtsp_strack_t *tr = ses->trackv + j;
 239                 net_Close( tr->fd );
 240                 REMOVE_ELEM( ses->trackv, ses->trackc, j );
 241             }
 242         }
 243     }
 244
 245     vlc_mutex_unlock( &rtsp->lock );
 246     httpd_UrlDelete( id->url );
 247     free( id );
 248 }
 249
 250
 251 /** rtsp must be locked */
 252 static
 253 rtsp_session_t *RtspClientNew( rtsp_stream_t *rtsp )
 254 {
 255     rtsp_session_t *s = malloc( sizeof( *s ) );
 256     if( s == NULL )
 257         return NULL;
 258
 259     s->stream = rtsp;
 260     vlc_rand_bytes (&s->id, sizeof (s->id));
 261     s->trackc = 0;
 262     s->trackv = NULL;
 263
 264     TAB_APPEND( rtsp->sessionc, rtsp->sessionv, s );
 265
 266     return s;
 267 }
 268
 269
 270 /** rtsp must be locked */
 271 static
 272 rtsp_session_t *RtspClientGet( rtsp_stream_t *rtsp, const char *name )
 273 {
 274     char *end;
 275     uint64_t id;
 276     int i;
 277
 278     if( name == NULL )
 279         return NULL;
 280
 281     errno = 0;
 282     id = strtoull( name, &end, 0x10 );
 283     if( errno || *end )
 284         return NULL;
 285
 286     /* FIXME: use a hash/dictionary */
 287     for( i = 0; i < rtsp->sessionc; i++ )
 288     {
 289         if( rtsp->sessionv[i]->id == id )
 290             return rtsp->sessionv[i];
 291     }
 292     return NULL;
 293 }
 294
 295
 296 /** rtsp must be locked */
 297 static
 298 void RtspClientDel( rtsp_stream_t *rtsp, rtsp_session_t *session )
 299 {
 300     int i;
 301     TAB_REMOVE( rtsp->sessionc, rtsp->sessionv, session );
 302
 303     for( i = 0; i < session->trackc; i++ )
 304         rtp_del_sink( session->trackv[i].id, session->trackv[i].fd );
 305
 306     free( session->trackv );
 307     free( session );
 308 }
 309
 310
 311 /** Finds the next transport choice */
 312 static inline const char *transport_next( const char *str )
 313 {
 314     /* Looks for comma */
 315     str = strchr( str, ',' );
 316     if( str == NULL )
 317         return NULL; /* No more transport options */
 318
 319     str++; /* skips comma */
 320     while( strchr( "\r\n\t ", *str ) )
 321         str++;
 322
 323     return (*str) ? str : NULL;
 324 }
 325
 326
 327 /** Finds the next transport parameter */
 328 static inline const char *parameter_next( const char *str )
 329 {
 330     while( strchr( ",;", *str ) == NULL )
 331         str++;
 332
 333     return (*str == ';') ? (str + 1) : NULL;
 334 }
 335
 336
 337 /** RTSP requests handler
 338  * @param id selected track for non-aggregate URLs,
 339  *           NULL for aggregate URLs
 340  */
 341 static int RtspHandler( rtsp_stream_t *rtsp, rtsp_stream_id_t *id,
 342                         httpd_client_t *cl,
 343                         httpd_message_t *answer,
 344                         const httpd_message_t *query )
 345 {
 346     sout_stream_t *p_stream = rtsp->owner;
 347     char psz_sesbuf[17];
 348     const char *psz_session = NULL, *psz;
 349     char control[sizeof("rtsp://[]:12345") + NI_MAXNUMERICHOST
 350                   + strlen( rtsp->psz_path )];
 351     time_t now;
 352
 353     time (&now);
 354
 355     if( answer == NULL || query == NULL || cl == NULL )
 356         return VLC_SUCCESS;
 357     else
 358     {
 359         /* Build self-referential control URL */
 360         char ip[NI_MAXNUMERICHOST], *ptr;
 361
 362         httpd_ServerIP( cl, ip );
 363         ptr = strchr( ip, '%' );
 364         if( ptr != NULL )
 365             *ptr = '\0';
 366
 367         if( strchr( ip, ':' ) != NULL )
 368             sprintf( control, "rtsp://[%s]:%u%s", ip, rtsp->port,
 369                      rtsp->psz_path );
 370         else
 371             sprintf( control, "rtsp://%s:%u%s", ip, rtsp->port,
 372                      rtsp->psz_path );
 373     }
 374
 375     /* */
 376     answer->i_proto = HTTPD_PROTO_RTSP;
 377     answer->i_version= 0;
 378     answer->i_type   = HTTPD_MSG_ANSWER;
 379     answer->i_body = 0;
 380     answer->p_body = NULL;
 381
 382     httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
 383
 384     /* Date: is always allowed, and sometimes mandatory with RTSP/2.0. */
 385     struct tm ut;
 386     if (gmtime_r (&now, &ut) != NULL)
 387     {   /* RFC1123 format, GMT is mandatory */
 388         static const char wdays[7][4] = {
 389             "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
 390         static const char mons[12][4] = {
 391             "Jan", "Feb", "Mar", "Apr", "May", "Jun",
 392             "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
 393         httpd_MsgAdd (answer, "Date", "%s, %02u %s %04u %02u:%02u:%02u GMT",
 394                       wdays[ut.tm_wday], ut.tm_mday, mons[ut.tm_mon],
 395                       1900 + ut.tm_year, ut.tm_hour, ut.tm_min, ut.tm_sec);
 396     }
 397
 398     if( query->i_proto != HTTPD_PROTO_RTSP )
 399     {
 400         answer->i_status = 505;
 401     }
 402     else
 403     if( httpd_MsgGet( query, "Require" ) != NULL )
 404     {
 405         answer->i_status = 551;
 406         httpd_MsgAdd( answer, "Unsupported", "%s",
 407                       httpd_MsgGet( query, "Require" ) );
 408     }
 409     else
 410     switch( query->i_type )
 411     {
 412         case HTTPD_MSG_DESCRIBE:
 413         {   /* Aggregate-only */
 414             if( id != NULL )
 415             {
 416                 answer->i_status = 460;
 417                 break;
 418             }
 419
 420             answer->i_status = 200;
 421             httpd_MsgAdd( answer, "Content-Type",  "%s", "application/sdp" );
 422             httpd_MsgAdd( answer, "Content-Base",  "%s", control );
 423             answer->p_body = (uint8_t *)SDPGenerate( rtsp->owner, control );
 424             if( answer->p_body != NULL )
 425                 answer->i_body = strlen( (char *)answer->p_body );
 426             else
 427                 answer->i_status = 500;
 428             break;
 429         }
 430
 431         case HTTPD_MSG_SETUP:
 432             /* Non-aggregate-only */
 433             if( id == NULL )
 434             {
 435                 answer->i_status = 459;
 436                 break;
 437             }
 438
 439             psz_session = httpd_MsgGet( query, "Session" );
 440             answer->i_status = 461;
 441
 442             for( const char *tpt = httpd_MsgGet( query, "Transport" );
 443                  tpt != NULL;
 444                  tpt = transport_next( tpt ) )
 445             {
 446                 bool b_multicast = true, b_unsupp = false;
 447                 unsigned loport = 5004, hiport = 5005; /* from RFC3551 */
 448
 449                 /* Check transport protocol. */
 450                 /* Currently, we only support RTP/AVP over UDP */
 451                 if( strncmp( tpt, "RTP/AVP", 7 ) )
 452                     continue;
 453                 tpt += 7;
 454                 if( strncmp( tpt, "/UDP", 4 ) == 0 )
 455                     tpt += 4;
 456                 if( strchr( ";,", *tpt ) == NULL )
 457                     continue;
 458
 459                 /* Parse transport options */
 460                 for( const char *opt = parameter_next( tpt );
 461                      opt != NULL;
 462                      opt = parameter_next( opt ) )
 463                 {
 464                     if( strncmp( opt, "multicast", 9 ) == 0)
 465                         b_multicast = true;
 466                     else
 467                     if( strncmp( opt, "unicast", 7 ) == 0 )
 468                         b_multicast = false;
 469                     else
 470                     if( sscanf( opt, "client_port=%u-%u", &loport, &hiport )
 471                                 == 2 )
 472                         ;
 473                     else
 474                     if( strncmp( opt, "mode=", 5 ) == 0 )
 475                     {
 476                         if( strncasecmp( opt + 5, "play", 4 )
 477                          && strncasecmp( opt + 5, "\"PLAY\"", 6 ) )
 478                         {
 479                             /* Not playing?! */
 480                             b_unsupp = true;
 481                             break;
 482                         }
 483                     }
 484                     else
 485                     if( strncmp( opt,"destination=", 12 ) == 0 )
 486                     {
 487                         answer->i_status = 403;
 488                         b_unsupp = true;
 489                     }
 490                     else
 491                     {
 492                     /*
 493                      * Every other option is unsupported:
 494                      *
 495                      * "source" and "append" are invalid (server-only);
 496                      * "ssrc" also (as clarified per RFC2326bis).
 497                      *
 498                      * For multicast, "port", "layers", "ttl" are set by the
 499                      * stream output configuration.
 500                      *
 501                      * For unicast, we want to decide "server_port" values.
 502                      *
 503                      * "interleaved" is not implemented.
 504                      */
 505                         b_unsupp = true;
 506                         break;
 507                     }
 508                 }
 509
 510                 if( b_unsupp )
 511                     continue;
 512
 513                 if( b_multicast )
 514                 {
 515                     const char *dst = id->dst;
 516                     if( dst == NULL )
 517                         continue;
 518
 519                     if( psz_session == NULL )
 520                     {
 521                         /* Create a dummy session ID */
 522                         snprintf( psz_sesbuf, sizeof( psz_sesbuf ), "%d",
 523                                   rand() );
 524                         psz_session = psz_sesbuf;
 525                     }
 526                     answer->i_status = 200;
 527
 528                     httpd_MsgAdd( answer, "Transport",
 529                                   "RTP/AVP/UDP;destination=%s;port=%u-%u;"
 530                                   "ttl=%d;mode=play",
 531                                   dst, id->loport, id->hiport,
 532                                   ( id->ttl > 0 ) ? id->ttl : 1 );
 533                 }
 534                 else
 535                 {
 536                     char ip[NI_MAXNUMERICHOST], src[NI_MAXNUMERICHOST];
 537                     rtsp_session_t *ses = NULL;
 538                     rtsp_strack_t track = { id->sout_id, -1, false };
 539                     int sport;
 540
 541                     if( httpd_ClientIP( cl, ip ) == NULL )
 542                     {
 543                         answer->i_status = 500;
 544                         continue;
 545                     }
 546
 547                     track.fd = net_ConnectDgram( p_stream, ip, loport, -1,
 548                                                  IPPROTO_UDP );
 549                     if( track.fd == -1 )
 550                     {
 551                         msg_Err( p_stream,
 552                                  "cannot create RTP socket for %s port %u",
 553                                  ip, loport );
 554                         answer->i_status = 500;
 555                         continue;
 556                     }
 557
 558                     net_GetSockAddress( track.fd, src, &sport );
 559
 560                     vlc_mutex_lock( &rtsp->lock );
 561                     if( psz_session == NULL )
 562                     {
 563                         ses = RtspClientNew( rtsp );
 564                         snprintf( psz_sesbuf, sizeof( psz_sesbuf ), "%"PRIx64,
 565                                   ses->id );
 566                         psz_session = psz_sesbuf;
 567                     }
 568                     else
 569                     {
 570                         /* FIXME: we probably need to remove an access out,
 571                          * if there is already one for the same ID */
 572                         ses = RtspClientGet( rtsp, psz_session );
 573                         if( ses == NULL )
 574                         {
 575                             answer->i_status = 454;
 576                             vlc_mutex_unlock( &rtsp->lock );
 577                             continue;
 578                         }
 579                     }
 580
 581                     INSERT_ELEM( ses->trackv, ses->trackc, ses->trackc,
 582                                  track );
 583                     vlc_mutex_unlock( &rtsp->lock );
 584
 585                     httpd_ServerIP( cl, ip );
 586
 587                     if( strcmp( src, ip ) )
 588                     {
 589                         /* Specify source IP if it is different from the RTSP
 590                          * control connection server address */
 591                         char *ptr = strchr( src, '%' );
 592                         if( ptr != NULL ) *ptr = '\0'; /* remove scope ID */
 593
 594                         httpd_MsgAdd( answer, "Transport",
 595                                       "RTP/AVP/UDP;unicast;source=%s;"
 596                                       "client_port=%u-%u;server_port=%u-%u;"
 597                                       "ssrc=%08X;mode=play",
 598                                       src, loport, loport + 1, sport,
 599                                       sport + 1, id->ssrc );
 600                     }
 601                     else
 602                     {
 603                         httpd_MsgAdd( answer, "Transport",
 604                                       "RTP/AVP/UDP;unicast;"
 605                                       "client_port=%u-%u;server_port=%u-%u;"
 606                                       "ssrc=%08X;mode=play",
 607                                       loport, loport + 1, sport, sport + 1,
 608                                       id->ssrc );
 609                     }
 610
 611                     answer->i_status = 200;
 612                 }
 613                 break;
 614             }
 615             break;
 616
 617         case HTTPD_MSG_PLAY:
 618         {
 619             rtsp_session_t *ses;
 620             answer->i_status = 200;
 621
 622             psz_session = httpd_MsgGet( query, "Session" );
 623             const char *range = httpd_MsgGet (query, "Range");
 624             if (range && strncmp (range, "npt=", 4))
 625             {
 626                 answer->i_status = 501;
 627                 break;
 628             }
 629
 630             vlc_mutex_lock( &rtsp->lock );
 631             ses = RtspClientGet( rtsp, psz_session );
 632             if( ses != NULL )
 633             {
 634                 /* FIXME: we really need to limit the number of tracks... */
 635                 char info[ses->trackc * ( strlen( control )
 636                                   + sizeof("/trackID=123;seq=65535, ") ) + 1];
 637                 size_t infolen = 0;
 638
 639                 for( int i = 0; i < ses->trackc; i++ )
 640                 {
 641                     rtsp_strack_t *tr = ses->trackv + i;
 642                     if( ( id == NULL ) || ( tr->id == id->sout_id ) )
 643                     {
 644                         if( !tr->playing )
 645                         {
 646                             tr->playing = true;
 647                             rtp_add_sink( tr->id, tr->fd, false );
 648                         }
 649                         infolen += sprintf( info + infolen,
 650                                             "%s/trackID=%u;seq=%u, ", control,
 651                                             rtp_get_num( tr->id ),
 652                                             rtp_get_seq( tr->id ) );
 653                     }
 654                 }
 655                 if( infolen > 0 )
 656                 {
 657                     info[infolen - 2] = '\0'; /* remove trailing ", " */
 658                     httpd_MsgAdd( answer, "RTP-Info", "%s", info );
 659                 }
 660             }
 661             vlc_mutex_unlock( &rtsp->lock );
 662
 663             if( httpd_MsgGet( query, "Scale" ) != NULL )
 664                 httpd_MsgAdd( answer, "Scale", "1." );
 665             break;
 666         }
 667
 668         case HTTPD_MSG_PAUSE:
 669             answer->i_status = 405;
 670             httpd_MsgAdd( answer, "Allow",
 671                           "%s, TEARDOWN, PLAY, GET_PARAMETER",
 672                           ( id != NULL ) ? "SETUP" : "DESCRIBE" );
 673             break;
 674
 675         case HTTPD_MSG_GETPARAMETER:
 676             if( query->i_body > 0 )
 677             {
 678                 answer->i_status = 451;
 679                 break;
 680             }
 681
 682             psz_session = httpd_MsgGet( query, "Session" );
 683             answer->i_status = 200;
 684             break;
 685
 686         case HTTPD_MSG_TEARDOWN:
 687         {
 688             rtsp_session_t *ses;
 689
 690             answer->i_status = 200;
 691
 692             psz_session = httpd_MsgGet( query, "Session" );
 693
 694             vlc_mutex_lock( &rtsp->lock );
 695             ses = RtspClientGet( rtsp, psz_session );
 696             if( ses != NULL )
 697             {
 698                 if( id == NULL ) /* Delete the entire session */
 699                     RtspClientDel( rtsp, ses );
 700                 else /* Delete one track from the session */
 701                 for( int i = 0; i < ses->trackc; i++ )
 702                 {
 703                     if( ses->trackv[i].id == id->sout_id )
 704                     {
 705                         rtp_del_sink( id->sout_id, ses->trackv[i].fd );
 706                         REMOVE_ELEM( ses->trackv, ses->trackc, i );
 707                     }
 708                 }
 709             }
 710             vlc_mutex_unlock( &rtsp->lock );
 711             break;
 712         }
 713
 714         default:
 715             return VLC_EGENERIC;
 716     }
 717
 718     if( psz_session )
 719         httpd_MsgAdd( answer, "Session", "%s"/*;timeout=5*/, psz_session );
 720
 721     httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
 722     httpd_MsgAdd( answer, "Cache-Control", "no-cache" );
 723
 724     psz = httpd_MsgGet( query, "Cseq" );
 725     if( psz != NULL )
 726         httpd_MsgAdd( answer, "Cseq", "%s", psz );
 727     psz = httpd_MsgGet( query, "Timestamp" );
 728     if( psz != NULL )
 729         httpd_MsgAdd( answer, "Timestamp", "%s", psz );
 730
 731     return VLC_SUCCESS;
 732 }
 733
 734
 735 /** Aggregate RTSP callback */
 736 static int RtspCallback( httpd_callback_sys_t *p_args,
 737                          httpd_client_t *cl,
 738                          httpd_message_t *answer,
 739                          const httpd_message_t *query )
 740 {
 741     return RtspHandler( (rtsp_stream_t *)p_args, NULL, cl, answer, query );
 742 }
 743
 744
 745 /** Non-aggregate RTSP callback */
 746 static int RtspCallbackId( httpd_callback_sys_t *p_args,
 747                            httpd_client_t *cl,
 748                            httpd_message_t *answer,
 749                            const httpd_message_t *query )
 750 {
 751     rtsp_stream_id_t *id = (rtsp_stream_id_t *)p_args;
 752     return RtspHandler( id->stream, id, cl, answer, query );
 753 }