1 /*****************************************************************************
2 * sap.c : SAP interface module
3 *****************************************************************************
4 * Copyright (C) 2004 VideoLAN
7 * Authors: Clément Stenac <zorglub@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
32 #include <vlc/input.h>
36 #include <errno.h> /* ENOMEM */
41 #ifdef HAVE_SYS_TIME_H
42 # include <sys/time.h>
49 /************************************************************************
50 * Macros and definitions
51 ************************************************************************/
53 #define MAX_LINE_LENGTH 256
55 /* SAP is always on that port */
57 #define SAP_V4_ADDRESS "224.2.127.254"
60 #define IPV6_ADDR_1 "FF0" /* Scope is inserted between them */
61 #define IPV6_ADDR_2 "::2:7FFE"
64 /*****************************************************************************
66 *****************************************************************************/
67 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
68 #define SAP_ADDR_LONGTEXT N_( "SAP multicast address" )
69 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
70 #define SAP_IPV4_LONGTEXT N_( \
71 "Set this if you want the SAP module to listen to IPv4 announces" )
72 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
73 #define SAP_IPV6_LONGTEXT N_( \
74 "Set this if you want the SAP module to listen to IPv6 announces" )
75 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
76 #define SAP_SCOPE_LONGTEXT N_( \
77 "Sets the scope for IPv6 announces (default is 8)" )
78 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
79 #define SAP_TIMEOUT_LONGTEXT N_( \
80 "Sets the time before SAP items get deleted if no new announce " \
82 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
83 #define SAP_PARSE_LONGTEXT N_( \
84 "When SAP can it will try to parse the SAP. If you don't select " \
85 "this, all announces will be parsed by the livedotcom module" )
86 #define SAP_CACHE_TEXT N_("Use SAP cache")
87 #define SAP_CACHE_LONGTEXT N_( \
88 "If this option is selected, a SAP caching mechanism will be used." \
89 "This will result in lower SAP startup time, but you could end up " \
90 "with items corresponding to legacy streams." )
93 static int Open ( vlc_object_t * );
94 static void Close( vlc_object_t * );
95 static int OpenDemux ( vlc_object_t * );
96 static void CloseDemux ( vlc_object_t * );
99 set_description( _("SAP interface") );
101 add_string( "sap-addr", NULL, NULL,
102 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
103 add_bool( "sap-ipv4", 1 , NULL,
104 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
105 add_bool( "sap-ipv6", 0 , NULL,
106 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
107 add_string( "sap-ipv6-scope", "8" , NULL,
108 SAP_SCOPE_TEXT, SAP_SCOPE_LONGTEXT, VLC_TRUE);
109 add_integer( "sap-timeout", 1800, NULL,
110 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
111 add_bool( "sap-parse", 1 , NULL,
112 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
113 add_bool( "sap-cache", 0 , NULL,
114 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
116 set_capability( "services_discovery", 0 );
117 set_callbacks( Open, Close );
120 set_description( _("SDP file parser for UDP") );
121 add_shortcut( "sdp" );
122 set_capability( "demux2", 51 );
123 set_callbacks( OpenDemux, CloseDemux );
127 /*****************************************************************************
129 *****************************************************************************/
131 typedef struct sdp_t sdp_t;
132 typedef struct attribute_t attribute_t;
133 typedef struct sap_announce_t sap_announce_t;
135 /* The structure that contains sdp information */
141 char *psz_sessionname;
143 /* Raw m= and c= fields */
144 char *psz_connection;
149 char *psz_network_type;
150 char *psz_address_type;
152 int64_t i_session_id;
157 int i_in; /* IP version */
162 attribute_t **pp_attributes;
171 struct sap_announce_t
176 uint32_t i_source[4];
178 /* SAP annnounces must only contain one SDP */
181 playlist_item_t *p_item;
184 struct services_discovery_sys_t
186 /* Socket descriptors */
191 playlist_item_t *p_node;
193 /* Table of announces */
195 struct sap_announce_t **pp_announces;
204 /*****************************************************************************
206 *****************************************************************************/
210 static int Demux( demux_t *p_demux );
211 static int Control( demux_t *, int, va_list );
212 static void Run ( services_discovery_t *p_sd );
214 /* Main parsing functions */
215 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
216 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
217 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
218 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
219 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
222 static void CacheLoad( services_discovery_t *p_sd );
223 static void CacheSave( services_discovery_t *p_sd );
224 /* Helper functions */
225 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
226 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
227 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
229 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
230 static void FreeSDP( sdp_t *p_sdp );
233 /* Detect multicast addresses */
234 static int ismult( char * );
237 if( p ) { free( p ); (p) = NULL; }
238 /*****************************************************************************
239 * Open: initialize and create stuff
240 *****************************************************************************/
241 static int Open( vlc_object_t *p_this )
243 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
244 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
245 malloc( sizeof( services_discovery_sys_t ) );
247 playlist_t *p_playlist;
248 playlist_view_t *p_view;
250 p_sys->i_timeout = config_GetInt( p_sd,"sap-timeout" );
259 p_sys->b_strict = VLC_FALSE;
260 p_sys->b_parse = config_GetInt( p_sd, "sap-parse" );
262 if( config_GetInt( p_sd, "sap-cache" ) )
267 if( config_GetInt( p_sd, "sap-ipv4" ) )
269 InitSocket( p_sd, SAP_V4_ADDRESS, SAP_PORT );
271 if( config_GetInt( p_sd, "sap-ipv6" ) )
276 /* TODO : Handle additionnal adresses */
278 if( p_sys->i_fd == 0 )
280 msg_Err( p_sd, "unable to read on any address");
284 /* Create our playlist node */
285 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
289 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
293 p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
294 p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
295 _("SAP"), p_view->p_root );
297 vlc_object_release( p_playlist );
299 p_sys->i_announces = 0;
300 p_sys->pp_announces = NULL;
305 /*****************************************************************************
306 * OpenDemux: initialize and create stuff
307 *****************************************************************************/
308 static int OpenDemux( vlc_object_t *p_this )
310 demux_t *p_demux = (demux_t *)p_this;
316 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 )
318 msg_Err( p_demux, "cannot peek" );
321 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
322 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
323 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
325 msg_Warn( p_demux, "SDP (UDP) module discarded" );
330 p_demux->pf_control = Control;
331 p_demux->pf_demux = Demux;
336 /*****************************************************************************
338 *****************************************************************************/
339 static void Close( vlc_object_t *p_this )
341 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
342 services_discovery_sys_t *p_sys = p_sd->p_sys;
344 playlist_t *p_playlist;
347 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
349 net_Close( p_sys->pi_fd[i] );
352 if( config_GetInt( p_sd, "sap-cache" ) )
357 for( i = p_sys->i_announces - 1; i>= 0; i-- )
359 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
362 p_playlist = (playlist_t *) vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
367 playlist_NodeDelete( p_playlist, p_sys->p_node, VLC_TRUE );
368 vlc_object_release( p_playlist );
374 /*****************************************************************************
375 * CloseDemux: Close the demuxer
376 *****************************************************************************/
377 static void CloseDemux( vlc_object_t *p_this )
382 /*****************************************************************************
383 * Run: main SAP thread
384 *****************************************************************************
385 * Listens to SAP packets, and sends them to packet_handle
386 *****************************************************************************/
387 #define MAX_SAP_BUFFER 5000
389 static void Run( services_discovery_t *p_sd )
392 /* Dirty hack to slow down the startup of the sap interface */
393 /* Unneeded now : our node is in no_select mode */
396 /* read SAP packets */
397 while( !p_sd->b_die )
399 p_buffer = (uint8_t *)malloc( MAX_SAP_BUFFER );
403 msg_Err( p_sd, "out of memory");
404 p_sd->b_die = VLC_TRUE;
408 int i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
409 p_sd->p_sys->i_fd, p_buffer,
410 MAX_SAP_BUFFER, 500000 );
412 /* Check for items that need deletion */
413 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
415 struct sap_announce_t *p_announce;
416 mtime_t i_timeout = ( mtime_t ) 1000000*p_sys->i_timeout;
417 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
419 msg_Dbg( p_sd,"Time out for %s, deleting (%i/%i)",
420 p_sd->p_sys->pp_announces[i]->psz_name,
421 i , p_sd->p_sys->i_announces );
423 /* Remove the playlist item */
424 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
428 int i_pos = playlist_GetPositionById( p_playlist,
429 p_sd->p_sys->pp_announces[i]->i_id );
430 playlist_Delete( p_playlist, i_pos );
431 vlc_object_release( p_playlist );
434 /* Free the p_announce */
435 p_announce = p_sd->p_sys->pp_announces[i];
436 if( p_announce->psz_name )
437 free( p_announce->psz_name );
438 if( p_announce->psz_uri )
439 free( p_announce->psz_uri );
441 /* Remove the sap_announce from the array */
442 REMOVE_ELEM( p_sd->p_sys->pp_announces,
443 p_sd->p_sys->i_announces,
452 /* Minimum length is > 6 */
457 msg_Warn( p_sd, "socket read error" );
463 p_buffer[i_read] = '\0';
465 /* Parse the packet */
466 ParseSAP( p_sd, p_buffer, i_read );
472 /**********************************************************************
473 * Demux: reads and demuxes data packets
474 * Return -1 if error, 0 if EOF, 1 else
475 **********************************************************************/
476 static int Demux( demux_t *p_demux )
478 int i_max_sdp = 1024;
480 char *psz_sdp = (char *)malloc( i_max_sdp );
483 playlist_t *p_playlist;
490 /* Gather the complete sdp file */
493 int i_read = stream_Read( p_demux->s,
494 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
499 msg_Err( p_demux, "failed to read SDP" );
505 if( i_read < i_max_sdp - i_sdp - 1 )
507 psz_sdp[i_sdp] = '\0';
512 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
515 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
519 msg_Warn( p_demux, "invalid SDP");
523 if( p_sdp->i_media > 1 )
528 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
530 p_sdp->psz_uri = NULL;
533 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
535 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
538 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
540 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
541 PLAYLIST_APPEND, PLAYLIST_END );
543 vlc_object_release( p_playlist );
551 static int Control( demux_t *p_demux, int i_query, va_list args )
556 /**************************************************************
558 **************************************************************/
560 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
562 int i_version, i_address_type, i_hash, i;
565 vlc_bool_t b_compressed;
566 vlc_bool_t b_need_delete = VLC_FALSE;
568 int i_decompressed_size;
569 uint8_t *p_decompressed_buffer;
572 /* First, check the sap announce is correct */
573 i_version = p_buffer[0] >> 5;
577 msg_Dbg( p_sd, "strange sap version %d found", i_version );
580 i_address_type = p_buffer[0] & 0x10;
582 if( (p_buffer[0] & 0x08) != 0 )
584 msg_Dbg( p_sd, "reserved bit incorrectly set" );
588 if( (p_buffer[0] & 0x04) != 0 )
590 msg_Dbg( p_sd, "session deletion packet" );
591 b_need_delete = VLC_TRUE;
594 if( p_buffer[0] & 0x02 )
596 msg_Dbg( p_sd, "encrypted packet, unsupported" );
600 b_compressed = p_buffer[0] & 0x01;
602 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
604 if( p_sd->p_sys->b_strict && i_hash == 0 )
606 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
610 psz_sdp = &p_buffer[4];
612 if( i_address_type == 0 ) /* ipv4 source address */
616 else /* ipv6 source address */
624 i_decompressed_size = Decompress( psz_sdp,
625 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
626 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
628 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
629 psz_sdp[i_decompressed_size] = '\0';
630 free( p_decompressed_buffer );
633 msg_Warn( p_sd, "Ignoring compressed sap packet" );
638 /* Add the size of authentification info */
639 psz_sdp += p_buffer[1];
641 /* Skip payload type */
642 /* Handle announces without \0 between SAP and SDP */
643 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
648 if( *psz_sdp == '\0' )
655 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
662 /* Decide whether we should add a playlist item for this SDP */
664 /* Multi-media or no-parse -> pass to LIVE.COM */
665 if( p_sdp->i_media > 1 || p_sd->p_sys->b_parse == VLC_FALSE )
667 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
671 /* Parse connection information (c= & m= ) */
672 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
674 p_sdp->psz_uri = NULL;
678 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
680 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
683 /* FIXME: we create a new announce each time the sdp changes */
684 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
688 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
693 p_sd->p_sys->pp_announces[i]->i_last = mdate();
700 if( p_sdp->i_media > 1 )
702 msg_Dbg( p_sd, "passing to LIVE.COM" );
705 CreateAnnounce( p_sd, i_hash, p_sdp );
710 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
713 playlist_t *p_playlist;
714 playlist_item_t *p_item, *p_child;
716 sap_announce_t *p_sap = (sap_announce_t *)malloc(
717 sizeof(sap_announce_t ) );
720 msg_Err( p_sd, "out of memory");
721 p_sd->b_die = VLC_TRUE;
724 p_sap->i_last = mdate();
725 p_sap->i_hash = i_hash;
726 p_sap->p_sdp = p_sdp;
727 p_sap->p_item = NULL;
729 /* Create the playlist item here */
730 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
731 p_sap->p_sdp->psz_sessionname );
738 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
740 if( psz_value == NULL )
742 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
745 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
749 msg_Err( p_sd, "playlist not found" );
755 if( psz_value != NULL )
757 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
759 if( p_child == NULL )
761 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
762 psz_value, p_sd->p_sys->p_node );
767 p_child = p_sd->p_sys->p_node;
770 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
772 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
773 PLAYLIST_APPEND, PLAYLIST_END );
775 vlc_object_release( p_playlist );
777 p_sap->p_item = p_item;
779 TAB_APPEND( p_sd->p_sys->i_announces,
780 p_sd->p_sys->pp_announces,
786 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
790 for( i = 0 ; i< p_sdp->i_attributes; i++ )
792 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
793 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
795 return p_sdp->pp_attributes[i]->psz_value;
802 /* Fill p_sdp->psz_uri */
803 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
807 char *psz_uri = NULL;
808 char *psz_proto = NULL;
812 if( p_sdp->psz_connection )
814 psz_parse = p_sdp->psz_connection;
816 psz_eof = strchr( psz_parse, ' ' );
821 psz_parse = psz_eof + 1;
825 msg_Warn( p_obj, "unable to parse c field (1)");
829 psz_eof = strchr( psz_parse, ' ' );
834 if( !strncmp( psz_parse, "IP4", 3 ) )
838 else if( !strncmp( psz_parse, "IP6", 3 ) )
846 psz_parse = psz_eof + 1;
850 msg_Warn( p_obj, "unable to parse c field (2)");
854 psz_eof = strchr( psz_parse, '/' );
862 msg_Dbg( p_obj, "incorrect c field");
864 psz_uri = strdup( psz_parse );
869 if( p_sdp->psz_media )
871 psz_parse = p_sdp->psz_media;
873 psz_eof = strchr( psz_parse, ' ' );
879 if( strncmp( psz_parse, "audio", 5 ) &&
880 strncmp( psz_parse, "video",5 ) )
882 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
887 psz_parse = psz_eof + 1;
891 msg_Warn( p_obj, "unable to parse m field (1)");
896 psz_eof = strchr( psz_parse, ' ' );
902 /* FIXME : multiple port ! */
903 i_port = atoi( psz_parse );
905 if( i_port <= 0 || i_port >= 65536 )
907 msg_Warn( p_obj, "invalid transport port %i", i_port );
910 psz_parse = psz_eof + 1;
914 msg_Warn( p_obj, "unable to parse m field (2)");
919 psz_eof = strchr( psz_parse, ' ' );
927 msg_Dbg( p_obj, "incorrect m field");
929 psz_proto = strdup( psz_parse );
932 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
935 psz_proto = strdup( "rtp" );
937 if( psz_proto && !strncmp( psz_proto, "UDP", 3 ) )
940 psz_proto = strdup( "udp" );
944 /* FIXME: HTTP support */
951 if( ismult( psz_uri ) )
953 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
957 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
964 /***********************************************************************
965 * ParseSDP : SDP parsing
966 * *********************************************************************
967 * Validate SDP and parse all fields
968 ***********************************************************************/
969 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
972 vlc_bool_t b_invalid = VLC_FALSE;
974 if( psz_sdp == NULL )
979 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
981 msg_Warn( p_obj, "bad SDP packet" );
985 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
987 p_sdp->psz_sdp = strdup( psz_sdp );
989 p_sdp->psz_sessionname = NULL;
990 p_sdp->psz_media = NULL;
991 p_sdp->psz_connection = NULL;
992 p_sdp->psz_uri = NULL;
993 p_sdp->psz_address = NULL;
994 p_sdp->psz_address_type= NULL;
997 p_sdp->i_attributes = 0;
998 p_sdp->pp_attributes = NULL;
1000 while( *psz_sdp != '\0' )
1007 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1008 *psz_sdp == ' ' || *psz_sdp == '\t' )
1013 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1015 psz_eol = psz_sdp + strlen( psz_sdp );
1017 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1022 if( psz_eol <= psz_sdp )
1028 /* no space allowed between fields */
1029 if( psz_sdp[1] != '=' )
1031 msg_Warn( p_obj, "invalid packet" ) ;
1036 /* Now parse each line */
1037 switch( psz_sdp[0] )
1042 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1047 /* o field is <username> <session id> <version>
1048 * <network type> <address type> <address> */
1050 #define GET_FIELD( store ) \
1051 psz_eof = strchr( psz_parse, ' ' ); \
1054 *psz_eof=0; store = strdup( psz_parse ); \
1058 if( i_field != 5 ) \
1060 b_invalid = VLC_TRUE; break; \
1064 store = strdup( psz_parse ); \
1067 psz_parse = psz_eof + 1; i_field++;
1070 psz_parse = &psz_sdp[2];
1071 GET_FIELD( p_sdp->psz_username );
1072 GET_FIELD( psz_sess_id );
1074 p_sdp->i_session_id = atoll( psz_sess_id );
1076 FREE( psz_sess_id );
1078 GET_FIELD( psz_sess_id );
1079 FREE( psz_sess_id );
1081 GET_FIELD( p_sdp->psz_network_type );
1082 GET_FIELD( p_sdp->psz_address_type );
1083 GET_FIELD( p_sdp->psz_address );
1094 case( 'a' ): /* attribute */
1096 char *psz_eon = strchr( &psz_sdp[2], ':' );
1098 attribute_t *p_attr = (attribute_t *)malloc(
1099 sizeof( attribute_t ) );
1101 /* Attribute with value */
1106 p_attr->psz_field = strdup( &psz_sdp[2] );
1107 p_attr->psz_value = strdup( psz_eon );
1109 else /* Attribute without value */
1111 p_attr->psz_field = strdup( &psz_sdp[2] );
1112 p_attr->psz_value = NULL;
1115 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1119 case( 'm' ): /* Media announcement */
1121 /* If we have several medias, we pass the announcement to
1122 * LIVE.COM, so just count them */
1124 if( p_sdp->i_media == 1 )
1126 p_sdp->psz_media = strdup( &psz_sdp[2] );
1133 if( p_sdp->i_media > 1 )
1136 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1157 /***********************************************************************
1158 * ismult: returns true if we have a multicast address
1159 ***********************************************************************/
1161 static int ismult( char *psz_uri )
1166 i_value = strtol( psz_uri, &psz_end, 0 );
1169 if( psz_uri[0] == '[')
1171 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1172 strncasecmp( &psz_uri[2], "FF0" , 3))
1175 return( VLC_FALSE );
1178 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1180 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1183 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port )
1185 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1189 INSERT_ELEM( p_sd->p_sys->pi_fd,
1196 return VLC_EGENERIC;
1200 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1202 int i_result, i_dstsize, n;
1203 unsigned char *psz_dst;
1206 d_stream.zalloc = (alloc_func)0;
1207 d_stream.zfree = (free_func)0;
1208 d_stream.opaque = (voidpf)0;
1210 i_result = inflateInit(&d_stream);
1211 if( i_result != Z_OK )
1213 printf( "inflateInit() failed. Result: %d\n", i_result );
1217 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1218 i_position = p_playlist->i_index;
1220 /* Gather the complete sdp file */
1223 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1225 d_stream.next_in = (Bytef *)psz_src;
1226 d_stream.avail_in = i_len;
1234 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1235 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1236 d_stream.avail_out = 1000;
1238 i_result = inflate(&d_stream, Z_NO_FLUSH);
1239 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1241 printf( "Zlib decompression failed. Result: %d\n", i_result );
1245 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1246 ( i_result != Z_STREAM_END ) );
1248 i_dstsize = d_stream.total_out;
1249 inflateEnd( &d_stream );
1251 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1258 static void FreeSDP( sdp_t *p_sdp )
1261 FREE( p_sdp->psz_sdp );
1262 FREE( p_sdp->psz_sessionname );
1263 FREE( p_sdp->psz_connection );
1264 FREE( p_sdp->psz_media );
1265 FREE( p_sdp->psz_uri );
1267 FREE( p_sdp->psz_address );
1268 FREE( p_sdp->psz_address_type );
1270 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1272 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1273 FREE( p_sdp->pp_attributes[i]->psz_field );
1274 FREE( p_sdp->pp_attributes[i]->psz_value );
1275 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1281 static int RemoveAnnounce( services_discovery_t *p_sd,
1282 sap_announce_t *p_announce )
1285 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1286 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1288 if( p_announce->p_sdp )
1290 FreeSDP( p_announce->p_sdp );
1295 return VLC_EGENERIC;
1298 if( p_announce->p_item )
1300 playlist_Delete( p_playlist, p_announce->p_item->input.i_id );
1303 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1305 if( p_sd->p_sys->pp_announces[i] == p_announce )
1307 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1313 vlc_object_release( p_playlist );
1320 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1322 /* A session is identified by
1323 * username, session_id, network type, address type and address */
1324 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1325 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1326 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1327 p_sdp1->psz_address && p_sdp2->psz_address )
1330 !strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1331 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1332 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1333 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1334 p_sdp1->i_session_id == p_sdp2->i_session_id )
1350 static void CacheLoad( services_discovery_t *p_sd )
1352 msg_Warn( p_sd, "Cache not implemented") ;
1355 static void CacheSave( services_discovery_t *p_sd )
1357 msg_Warn( p_sd, "Cache not implemented") ;