Fix a segfault (buffer overflow for win32 only).
[vlc.git] / 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     free( rtsp );
143 }
144
145
146 struct rtsp_stream_id_t
147 {
148     rtsp_stream_t    *stream;
149     sout_stream_id_t *sout_id;
150     httpd_url_t      *url;
151     const char       *dst;
152     int               ttl;
153     uint32_t          ssrc;
154     uint16_t          loport, hiport;
155 };
156
157
158 typedef struct rtsp_strack_t rtsp_strack_t;
159
160 /* For unicast streaming */
161 struct rtsp_session_t
162 {
163     rtsp_stream_t *stream;
164     uint64_t       id;
165
166     /* output (id-access) */
167     int            trackc;
168     rtsp_strack_t *trackv;
169 };
170
171
172 /* Unicast session track */
173 struct rtsp_strack_t
174 {
175     sout_stream_id_t  *id;
176     int                fd;
177     bool         playing;
178 };
179
180
181 rtsp_stream_id_t *RtspAddId( rtsp_stream_t *rtsp, sout_stream_id_t *sid,
182                              unsigned num, uint32_t ssrc,
183                              /* Multicast stuff - TODO: cleanup */
184                              const char *dst, int ttl,
185                              unsigned loport, unsigned hiport )
186 {
187     char urlbuf[sizeof( "/trackID=123" ) + strlen( rtsp->psz_path )];
188     rtsp_stream_id_t *id = malloc( sizeof( *id ) );
189     httpd_url_t *url;
190
191     if( id == NULL )
192         return NULL;
193
194     id->stream = rtsp;
195     id->sout_id = sid;
196     id->ssrc = ssrc;
197     /* TODO: can we assume that this need not be strdup'd? */
198     id->dst = dst;
199     if( id->dst != NULL )
200     {
201         id->ttl = ttl;
202         id->loport = loport;
203         id->hiport = hiport;
204     }
205
206     /* FIXME: num screws up if any ES has been removed and re-added */
207     snprintf( urlbuf, sizeof( urlbuf ), rtsp->track_fmt, rtsp->psz_path,
208               num );
209     msg_Dbg( rtsp->owner, "RTSP: adding %s", urlbuf );
210     url = id->url = httpd_UrlNewUnique( rtsp->host, urlbuf, NULL, NULL, NULL );
211
212     if( url == NULL )
213     {
214         free( id );
215         return NULL;
216     }
217
218     httpd_UrlCatch( url, HTTPD_MSG_DESCRIBE, RtspCallbackId, (void *)id );
219     httpd_UrlCatch( url, HTTPD_MSG_SETUP,    RtspCallbackId, (void *)id );
220     httpd_UrlCatch( url, HTTPD_MSG_PLAY,     RtspCallbackId, (void *)id );
221     httpd_UrlCatch( url, HTTPD_MSG_PAUSE,    RtspCallbackId, (void *)id );
222     httpd_UrlCatch( url, HTTPD_MSG_GETPARAMETER, RtspCallbackId, (void *)id );
223     httpd_UrlCatch( url, HTTPD_MSG_TEARDOWN, RtspCallbackId, (void *)id );
224
225     return id;
226 }
227
228
229 void RtspDelId( rtsp_stream_t *rtsp, rtsp_stream_id_t *id )
230 {
231     vlc_mutex_lock( &rtsp->lock );
232     for( int i = 0; i < rtsp->sessionc; i++ )
233     {
234         rtsp_session_t *ses = rtsp->sessionv[i];
235
236         for( int j = 0; j < ses->trackc; j++ )
237         {
238             if( ses->trackv[j].id == id->sout_id )
239             {
240                 rtsp_strack_t *tr = ses->trackv + j;
241                 net_Close( tr->fd );
242                 REMOVE_ELEM( ses->trackv, ses->trackc, j );
243             }
244         }
245     }
246
247     vlc_mutex_unlock( &rtsp->lock );
248     httpd_UrlDelete( id->url );
249     free( id );
250 }
251
252
253 /** rtsp must be locked */
254 static
255 rtsp_session_t *RtspClientNew( rtsp_stream_t *rtsp )
256 {
257     rtsp_session_t *s = malloc( sizeof( *s ) );
258     if( s == NULL )
259         return NULL;
260
261     s->stream = rtsp;
262     vlc_rand_bytes (&s->id, sizeof (s->id));
263     s->trackc = 0;
264     s->trackv = NULL;
265
266     TAB_APPEND( rtsp->sessionc, rtsp->sessionv, s );
267
268     return s;
269 }
270
271
272 /** rtsp must be locked */
273 static
274 rtsp_session_t *RtspClientGet( rtsp_stream_t *rtsp, const char *name )
275 {
276     char *end;
277     uint64_t id;
278     int i;
279
280     if( name == NULL )
281         return NULL;
282
283     errno = 0;
284     id = strtoull( name, &end, 0x10 );
285     if( errno || *end )
286         return NULL;
287
288     /* FIXME: use a hash/dictionary */
289     for( i = 0; i < rtsp->sessionc; i++ )
290     {
291         if( rtsp->sessionv[i]->id == id )
292             return rtsp->sessionv[i];
293     }
294     return NULL;
295 }
296
297
298 /** rtsp must be locked */
299 static
300 void RtspClientDel( rtsp_stream_t *rtsp, rtsp_session_t *session )
301 {
302     int i;
303     TAB_REMOVE( rtsp->sessionc, rtsp->sessionv, session );
304
305     for( i = 0; i < session->trackc; i++ )
306         rtp_del_sink( session->trackv[i].id, session->trackv[i].fd );
307
308     free( session->trackv );
309     free( session );
310 }
311
312
313 /** Finds the next transport choice */
314 static inline const char *transport_next( const char *str )
315 {
316     /* Looks for comma */
317     str = strchr( str, ',' );
318     if( str == NULL )
319         return NULL; /* No more transport options */
320
321     str++; /* skips comma */
322     while( strchr( "\r\n\t ", *str ) )
323         str++;
324
325     return (*str) ? str : NULL;
326 }
327
328
329 /** Finds the next transport parameter */
330 static inline const char *parameter_next( const char *str )
331 {
332     while( strchr( ",;", *str ) == NULL )
333         str++;
334
335     return (*str == ';') ? (str + 1) : NULL;
336 }
337
338
339 /** RTSP requests handler
340  * @param id selected track for non-aggregate URLs,
341  *           NULL for aggregate URLs
342  */
343 static int RtspHandler( rtsp_stream_t *rtsp, rtsp_stream_id_t *id,
344                         httpd_client_t *cl,
345                         httpd_message_t *answer,
346                         const httpd_message_t *query )
347 {
348     sout_stream_t *p_stream = rtsp->owner;
349     char psz_sesbuf[17];
350     const char *psz_session = NULL, *psz;
351     char control[sizeof("rtsp://[]:12345") + NI_MAXNUMERICHOST
352                   + strlen( rtsp->psz_path )];
353     time_t now;
354
355     time (&now);
356
357     if( answer == NULL || query == NULL || cl == NULL )
358         return VLC_SUCCESS;
359     else
360     {
361         /* Build self-referential control URL */
362         char ip[NI_MAXNUMERICHOST], *ptr;
363
364         httpd_ServerIP( cl, ip );
365         ptr = strchr( ip, '%' );
366         if( ptr != NULL )
367             *ptr = '\0';
368
369         if( strchr( ip, ':' ) != NULL )
370             sprintf( control, "rtsp://[%s]:%u%s", ip, rtsp->port,
371                      rtsp->psz_path );
372         else
373             sprintf( control, "rtsp://%s:%u%s", ip, rtsp->port,
374                      rtsp->psz_path );
375     }
376
377     /* */
378     answer->i_proto = HTTPD_PROTO_RTSP;
379     answer->i_version= 0;
380     answer->i_type   = HTTPD_MSG_ANSWER;
381     answer->i_body = 0;
382     answer->p_body = NULL;
383
384     httpd_MsgAdd( answer, "Server", "%s", PACKAGE_STRING );
385
386     /* Date: is always allowed, and sometimes mandatory with RTSP/2.0. */
387     struct tm ut;
388     if (gmtime_r (&now, &ut) != NULL)
389     {   /* RFC1123 format, GMT is mandatory */
390         static const char wdays[7][4] = {
391             "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
392         static const char mons[12][4] = {
393             "Jan", "Feb", "Mar", "Apr", "May", "Jun",
394             "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
395         httpd_MsgAdd (answer, "Date", "%s, %02u %s %04u %02u:%02u:%02u GMT",
396                       wdays[ut.tm_wday], ut.tm_mday, mons[ut.tm_mon],
397                       1900 + ut.tm_year, ut.tm_hour, ut.tm_min, ut.tm_sec);
398     }
399
400     if( query->i_proto != HTTPD_PROTO_RTSP )
401     {
402         answer->i_status = 505;
403     }
404     else
405     if( httpd_MsgGet( query, "Require" ) != NULL )
406     {
407         answer->i_status = 551;
408         httpd_MsgAdd( answer, "Unsupported", "%s",
409                       httpd_MsgGet( query, "Require" ) );
410     }
411     else
412     switch( query->i_type )
413     {
414         case HTTPD_MSG_DESCRIBE:
415         {   /* Aggregate-only */
416             if( id != NULL )
417             {
418                 answer->i_status = 460;
419                 break;
420             }
421
422             answer->i_status = 200;
423             httpd_MsgAdd( answer, "Content-Type",  "%s", "application/sdp" );
424             httpd_MsgAdd( answer, "Content-Base",  "%s", control );
425             answer->p_body = (uint8_t *)SDPGenerate( rtsp->owner, control );
426             if( answer->p_body != NULL )
427                 answer->i_body = strlen( (char *)answer->p_body );
428             else
429                 answer->i_status = 500;
430             break;
431         }
432
433         case HTTPD_MSG_SETUP:
434             /* Non-aggregate-only */
435             if( id == NULL )
436             {
437                 answer->i_status = 459;
438                 break;
439             }
440
441             psz_session = httpd_MsgGet( query, "Session" );
442             answer->i_status = 461;
443
444             for( const char *tpt = httpd_MsgGet( query, "Transport" );
445                  tpt != NULL;
446                  tpt = transport_next( tpt ) )
447             {
448                 bool b_multicast = true, b_unsupp = false;
449                 unsigned loport = 5004, hiport = 5005; /* from RFC3551 */
450
451                 /* Check transport protocol. */
452                 /* Currently, we only support RTP/AVP over UDP */
453                 if( strncmp( tpt, "RTP/AVP", 7 ) )
454                     continue;
455                 tpt += 7;
456                 if( strncmp( tpt, "/UDP", 4 ) == 0 )
457                     tpt += 4;
458                 if( strchr( ";,", *tpt ) == NULL )
459                     continue;
460
461                 /* Parse transport options */
462                 for( const char *opt = parameter_next( tpt );
463                      opt != NULL;
464                      opt = parameter_next( opt ) )
465                 {
466                     if( strncmp( opt, "multicast", 9 ) == 0)
467                         b_multicast = true;
468                     else
469                     if( strncmp( opt, "unicast", 7 ) == 0 )
470                         b_multicast = false;
471                     else
472                     if( sscanf( opt, "client_port=%u-%u", &loport, &hiport )
473                                 == 2 )
474                         ;
475                     else
476                     if( strncmp( opt, "mode=", 5 ) == 0 )
477                     {
478                         if( strncasecmp( opt + 5, "play", 4 )
479                          && strncasecmp( opt + 5, "\"PLAY\"", 6 ) )
480                         {
481                             /* Not playing?! */
482                             b_unsupp = true;
483                             break;
484                         }
485                     }
486                     else
487                     if( strncmp( opt,"destination=", 12 ) == 0 )
488                     {
489                         answer->i_status = 403;
490                         b_unsupp = true;
491                     }
492                     else
493                     {
494                     /*
495                      * Every other option is unsupported:
496                      *
497                      * "source" and "append" are invalid (server-only);
498                      * "ssrc" also (as clarified per RFC2326bis).
499                      *
500                      * For multicast, "port", "layers", "ttl" are set by the
501                      * stream output configuration.
502                      *
503                      * For unicast, we want to decide "server_port" values.
504                      *
505                      * "interleaved" is not implemented.
506                      */
507                         b_unsupp = true;
508                         break;
509                     }
510                 }
511
512                 if( b_unsupp )
513                     continue;
514
515                 if( b_multicast )
516                 {
517                     const char *dst = id->dst;
518                     if( dst == NULL )
519                         continue;
520
521                     if( psz_session == NULL )
522                     {
523                         /* Create a dummy session ID */
524                         snprintf( psz_sesbuf, sizeof( psz_sesbuf ), "%d",
525                                   rand() );
526                         psz_session = psz_sesbuf;
527                     }
528                     answer->i_status = 200;
529
530                     httpd_MsgAdd( answer, "Transport",
531                                   "RTP/AVP/UDP;destination=%s;port=%u-%u;"
532                                   "ttl=%d;mode=play",
533                                   dst, id->loport, id->hiport,
534                                   ( id->ttl > 0 ) ? id->ttl : 1 );
535                 }
536                 else
537                 {
538                     char ip[NI_MAXNUMERICHOST], src[NI_MAXNUMERICHOST];
539                     rtsp_session_t *ses = NULL;
540                     rtsp_strack_t track = { id->sout_id, -1, false };
541                     int sport;
542
543                     if( httpd_ClientIP( cl, ip ) == NULL )
544                     {
545                         answer->i_status = 500;
546                         continue;
547                     }
548
549                     track.fd = net_ConnectDgram( p_stream, ip, loport, -1,
550                                                  IPPROTO_UDP );
551                     if( track.fd == -1 )
552                     {
553                         msg_Err( p_stream,
554                                  "cannot create RTP socket for %s port %u",
555                                  ip, loport );
556                         answer->i_status = 500;
557                         continue;
558                     }
559
560                     net_GetSockAddress( track.fd, src, &sport );
561
562                     vlc_mutex_lock( &rtsp->lock );
563                     if( psz_session == NULL )
564                     {
565                         ses = RtspClientNew( rtsp );
566                         snprintf( psz_sesbuf, sizeof( psz_sesbuf ), "%"PRIx64,
567                                   ses->id );
568                         psz_session = psz_sesbuf;
569                     }
570                     else
571                     {
572                         /* FIXME: we probably need to remove an access out,
573                          * if there is already one for the same ID */
574                         ses = RtspClientGet( rtsp, psz_session );
575                         if( ses == NULL )
576                         {
577                             answer->i_status = 454;
578                             vlc_mutex_unlock( &rtsp->lock );
579                             continue;
580                         }
581                     }
582
583                     INSERT_ELEM( ses->trackv, ses->trackc, ses->trackc,
584                                  track );
585                     vlc_mutex_unlock( &rtsp->lock );
586
587                     httpd_ServerIP( cl, ip );
588
589                     if( strcmp( src, ip ) )
590                     {
591                         /* Specify source IP if it is different from the RTSP
592                          * control connection server address */
593                         char *ptr = strchr( src, '%' );
594                         if( ptr != NULL ) *ptr = '\0'; /* remove scope ID */
595
596                         httpd_MsgAdd( answer, "Transport",
597                                       "RTP/AVP/UDP;unicast;source=%s;"
598                                       "client_port=%u-%u;server_port=%u-%u;"
599                                       "ssrc=%08X;mode=play",
600                                       src, loport, loport + 1, sport,
601                                       sport + 1, id->ssrc );
602                     }
603                     else
604                     {
605                         httpd_MsgAdd( answer, "Transport",
606                                       "RTP/AVP/UDP;unicast;"
607                                       "client_port=%u-%u;server_port=%u-%u;"
608                                       "ssrc=%08X;mode=play",
609                                       loport, loport + 1, sport, sport + 1,
610                                       id->ssrc );
611                     }
612
613                     answer->i_status = 200;
614                 }
615                 break;
616             }
617             break;
618
619         case HTTPD_MSG_PLAY:
620         {
621             rtsp_session_t *ses;
622             answer->i_status = 200;
623
624             psz_session = httpd_MsgGet( query, "Session" );
625             const char *range = httpd_MsgGet (query, "Range");
626             if (range && strncmp (range, "npt=", 4))
627             {
628                 answer->i_status = 501;
629                 break;
630             }
631
632             vlc_mutex_lock( &rtsp->lock );
633             ses = RtspClientGet( rtsp, psz_session );
634             if( ses != NULL )
635             {
636                 /* FIXME: we really need to limit the number of tracks... */
637                 char info[ses->trackc * ( strlen( control )
638                               + sizeof("url=/trackID=123;seq=65535, ") ) + 1];
639                 size_t infolen = 0;
640
641                 for( int i = 0; i < ses->trackc; i++ )
642                 {
643                     rtsp_strack_t *tr = ses->trackv + i;
644                     if( ( id == NULL ) || ( tr->id == id->sout_id ) )
645                     {
646                         if( !tr->playing )
647                         {
648                             tr->playing = true;
649                             rtp_add_sink( tr->id, tr->fd, false );
650                         }
651                         infolen += sprintf( info + infolen,
652                                             "url=%s/trackID=%u;seq=%u, ",
653                                             control,
654                                             rtp_get_num( tr->id ),
655                                             rtp_get_seq( tr->id ) );
656                     }
657                 }
658                 if( infolen > 0 )
659                 {
660                     info[infolen - 2] = '\0'; /* remove trailing ", " */
661                     httpd_MsgAdd( answer, "RTP-Info", "%s", info );
662                 }
663             }
664             vlc_mutex_unlock( &rtsp->lock );
665
666             if( httpd_MsgGet( query, "Scale" ) != NULL )
667                 httpd_MsgAdd( answer, "Scale", "1." );
668             break;
669         }
670
671         case HTTPD_MSG_PAUSE:
672             answer->i_status = 405;
673             httpd_MsgAdd( answer, "Allow",
674                           "%s, TEARDOWN, PLAY, GET_PARAMETER",
675                           ( id != NULL ) ? "SETUP" : "DESCRIBE" );
676             break;
677
678         case HTTPD_MSG_GETPARAMETER:
679             if( query->i_body > 0 )
680             {
681                 answer->i_status = 451;
682                 break;
683             }
684
685             psz_session = httpd_MsgGet( query, "Session" );
686             answer->i_status = 200;
687             break;
688
689         case HTTPD_MSG_TEARDOWN:
690         {
691             rtsp_session_t *ses;
692
693             answer->i_status = 200;
694
695             psz_session = httpd_MsgGet( query, "Session" );
696
697             vlc_mutex_lock( &rtsp->lock );
698             ses = RtspClientGet( rtsp, psz_session );
699             if( ses != NULL )
700             {
701                 if( id == NULL ) /* Delete the entire session */
702                     RtspClientDel( rtsp, ses );
703                 else /* Delete one track from the session */
704                 for( int i = 0; i < ses->trackc; i++ )
705                 {
706                     if( ses->trackv[i].id == id->sout_id )
707                     {
708                         rtp_del_sink( id->sout_id, ses->trackv[i].fd );
709                         REMOVE_ELEM( ses->trackv, ses->trackc, i );
710                     }
711                 }
712             }
713             vlc_mutex_unlock( &rtsp->lock );
714             break;
715         }
716
717         default:
718             return VLC_EGENERIC;
719     }
720
721     if( psz_session )
722         httpd_MsgAdd( answer, "Session", "%s"/*;timeout=5*/, psz_session );
723
724     httpd_MsgAdd( answer, "Content-Length", "%d", answer->i_body );
725     httpd_MsgAdd( answer, "Cache-Control", "no-cache" );
726
727     psz = httpd_MsgGet( query, "Cseq" );
728     if( psz != NULL )
729         httpd_MsgAdd( answer, "Cseq", "%s", psz );
730     psz = httpd_MsgGet( query, "Timestamp" );
731     if( psz != NULL )
732         httpd_MsgAdd( answer, "Timestamp", "%s", psz );
733
734     return VLC_SUCCESS;
735 }
736
737
738 /** Aggregate RTSP callback */
739 static int RtspCallback( httpd_callback_sys_t *p_args,
740                          httpd_client_t *cl,
741                          httpd_message_t *answer,
742                          const httpd_message_t *query )
743 {
744     return RtspHandler( (rtsp_stream_t *)p_args, NULL, cl, answer, query );
745 }
746
747
748 /** Non-aggregate RTSP callback */
749 static int RtspCallbackId( httpd_callback_sys_t *p_args,
750                            httpd_client_t *cl,
751                            httpd_message_t *answer,
752                            const httpd_message_t *query )
753 {
754     rtsp_stream_id_t *id = (rtsp_stream_id_t *)p_args;
755     return RtspHandler( id->stream, id, cl, answer, query );
756 }