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;
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" );
332 p_demux->pf_control = Control;
333 p_demux->pf_demux = Demux;
338 /*****************************************************************************
340 *****************************************************************************/
341 static void Close( vlc_object_t *p_this )
343 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
344 services_discovery_sys_t *p_sys = p_sd->p_sys;
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] );
365 /*****************************************************************************
366 * CloseDemux: Close the demuxer
367 *****************************************************************************/
368 static void CloseDemux( vlc_object_t *p_this )
373 /*****************************************************************************
374 * Run: main SAP thread
375 *****************************************************************************
376 * Listens to SAP packets, and sends them to packet_handle
377 *****************************************************************************/
378 #define MAX_SAP_BUFFER 5000
380 static void Run( services_discovery_t *p_sd )
383 /* Dirty hack to slow down the startup of the sap interface */
384 /* Unneeded now : our node is in no_select mode */
387 /* read SAP packets */
388 while( !p_sd->b_die )
390 p_buffer = (uint8_t *)malloc( MAX_SAP_BUFFER );
394 msg_Err( p_sd, "out of memory");
395 p_sd->b_die = VLC_TRUE;
399 int i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
400 p_sd->p_sys->i_fd, p_buffer,
401 MAX_SAP_BUFFER, 500000 );
403 /* Check for items that need deletion */
404 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
406 struct sap_announce_t *p_announce;
407 mtime_t i_timeout = ( mtime_t ) 1000000*p_sys->i_timeout;
408 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
410 msg_Dbg( p_sd,"Time out for %s, deleting (%i/%i)",
411 p_sd->p_sys->pp_announces[i]->psz_name,
412 i , p_sd->p_sys->i_announces );
414 /* Remove the playlist item */
415 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
419 int i_pos = playlist_GetPositionById( p_playlist,
420 p_sd->p_sys->pp_announces[i]->i_id );
421 playlist_Delete( p_playlist, i_pos );
422 vlc_object_release( p_playlist );
425 /* Free the p_announce */
426 p_announce = p_sd->p_sys->pp_announces[i];
427 if( p_announce->psz_name )
428 free( p_announce->psz_name );
429 if( p_announce->psz_uri )
430 free( p_announce->psz_uri );
432 /* Remove the sap_announce from the array */
433 REMOVE_ELEM( p_sd->p_sys->pp_announces,
434 p_sd->p_sys->i_announces,
443 /* Minimum length is > 6 */
448 msg_Warn( p_sd, "socket read error" );
454 p_buffer[i_read] = '\0';
456 /* Parse the packet */
457 ParseSAP( p_sd, p_buffer, i_read );
463 /**********************************************************************
464 * Demux: reads and demuxes data packets
465 * Return -1 if error, 0 if EOF, 1 else
466 **********************************************************************/
467 static int Demux( demux_t *p_demux )
469 int i_max_sdp = 1024;
471 char *psz_sdp = (char *)malloc( i_max_sdp );
474 playlist_t *p_playlist;
476 /* Gather the complete sdp file */
479 int i_read = stream_Read( p_demux->s,
480 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
486 msg_Err( p_demux, "failed to read SDP" );
492 if( i_read < i_max_sdp - i_sdp - 1 )
494 psz_sdp[i_sdp] = '\0';
499 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
502 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
504 if( !p_sdp ) return -1;
506 if( p_sdp->i_media > 1 )
511 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
513 p_sdp->psz_uri = NULL;
516 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
518 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
521 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
523 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
524 PLAYLIST_APPEND, PLAYLIST_END );
526 vlc_object_release( p_playlist );
534 static int Control( demux_t *p_demux, int i_query, va_list args )
539 /**************************************************************
541 **************************************************************/
543 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
545 int i_version, i_address_type, i_hash, i;
548 vlc_bool_t b_compressed;
549 vlc_bool_t b_need_delete = VLC_FALSE;
551 int i_decompressed_size;
552 uint8_t *p_decompressed_buffer;
555 /* First, check the sap announce is correct */
556 i_version = p_buffer[0] >> 5;
560 msg_Dbg( p_sd, "strange sap version %d found", i_version );
563 i_address_type = p_buffer[0] & 0x10;
565 if( (p_buffer[0] & 0x08) != 0 )
567 msg_Dbg( p_sd, "reserved bit incorrectly set" );
571 if( (p_buffer[0] & 0x04) != 0 )
573 msg_Dbg( p_sd, "session deletion packet" );
574 b_need_delete = VLC_TRUE;
577 if( p_buffer[0] & 0x02 )
579 msg_Dbg( p_sd, "encrypted packet, unsupported" );
583 b_compressed = p_buffer[0] & 0x01;
585 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
587 if( p_sd->p_sys->b_strict && i_hash == 0 )
589 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
593 psz_sdp = &p_buffer[4];
595 if( i_address_type == 0 ) /* ipv4 source address */
599 else /* ipv6 source address */
607 i_decompressed_size = Decompress( psz_sdp,
608 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
609 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
611 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
612 psz_sdp[i_decompressed_size] = '\0';
613 free( p_decompressed_buffer );
616 msg_Warn( p_sd, "Ignoring compressed sap packet" );
621 /* Add the size of authentification info */
622 psz_sdp += p_buffer[1];
624 /* Skip payload type */
625 /* Handle announces without \0 between SAP and SDP */
626 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
631 if( *psz_sdp == '\0' )
638 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
645 /* Decide whether we should add a playlist item for this SDP */
647 /* Multi-media or no-parse -> pass to LIVE.COM */
648 if( p_sdp->i_media > 1 || p_sd->p_sys->b_parse == VLC_FALSE )
650 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
654 /* Parse connection information (c= & m= ) */
655 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
657 p_sdp->psz_uri = NULL;
661 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
663 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
666 /* FIXME: we create a new announce each time the sdp changes */
667 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
671 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
676 p_sd->p_sys->pp_announces[i]->i_last = mdate();
683 if( p_sdp->i_media > 1 )
685 msg_Dbg( p_sd, "passing to LIVE.COM" );
688 CreateAnnounce( p_sd, i_hash, p_sdp );
693 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
696 playlist_t *p_playlist;
697 playlist_item_t *p_item, *p_child;
699 sap_announce_t *p_sap = (sap_announce_t *)malloc(
700 sizeof(sap_announce_t ) );
703 msg_Err( p_sd, "out of memory");
704 p_sd->b_die = VLC_TRUE;
707 p_sap->i_last = mdate();
708 p_sap->i_hash = i_hash;
709 p_sap->p_sdp = p_sdp;
710 p_sap->p_item = NULL;
712 /* Create the playlist item here */
713 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
714 p_sap->p_sdp->psz_sessionname );
721 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
723 if( psz_value == NULL )
725 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
728 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
732 msg_Err( p_sd, "playlist not found" );
738 if( psz_value != NULL )
740 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
742 if( p_child == NULL )
744 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
745 psz_value, p_sd->p_sys->p_node );
750 p_child = p_sd->p_sys->p_node;
753 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
755 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
756 PLAYLIST_APPEND, PLAYLIST_END );
758 vlc_object_release( p_playlist );
760 p_sap->p_item = p_item;
762 TAB_APPEND( p_sd->p_sys->i_announces,
763 p_sd->p_sys->pp_announces,
769 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
773 for( i = 0 ; i< p_sdp->i_attributes; i++ )
775 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
776 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
778 return p_sdp->pp_attributes[i]->psz_value;
785 /* Fill p_sdp->psz_uri */
786 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
790 char *psz_uri = NULL;
791 char *psz_proto = NULL;
795 if( p_sdp->psz_connection )
797 psz_parse = p_sdp->psz_connection;
799 psz_eof = strchr( psz_parse, ' ' );
804 psz_parse = psz_eof + 1;
808 msg_Warn( p_obj, "unable to parse c field (1)");
812 psz_eof = strchr( psz_parse, ' ' );
817 if( !strncmp( psz_parse, "IP4", 3 ) )
821 else if( !strncmp( psz_parse, "IP6", 3 ) )
829 psz_parse = psz_eof + 1;
833 msg_Warn( p_obj, "unable to parse c field (2)");
837 psz_eof = strchr( psz_parse, '/' );
842 psz_uri = strdup( psz_parse );
847 msg_Warn( p_obj, "unable to parse c field (3)");
854 if( p_sdp->psz_media )
856 psz_parse = p_sdp->psz_media;
858 psz_eof = strchr( psz_parse, ' ' );
864 if( strncmp( psz_parse, "audio", 5 ) &&
865 strncmp( psz_parse, "video",5 ) )
867 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
872 psz_parse = psz_eof + 1;
876 msg_Warn( p_obj, "unable to parse m field (1)");
881 psz_eof = strchr( psz_parse, ' ' );
887 /* FIXME : multiple port ! */
888 i_port = atoi( psz_parse );
890 if( i_port <= 0 || i_port >= 65536 )
892 msg_Warn( p_obj, "invalid transport port %i", i_port );
895 psz_parse = psz_eof + 1;
899 msg_Warn( p_obj, "unable to parse m field (2)");
904 psz_eof = strchr( psz_parse, ' ' );
910 psz_proto = strdup( psz_parse );
914 msg_Warn( p_obj, "unable to parse m field (3)");
919 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
922 psz_proto = strdup( "rtp" );
926 /* FIXME: HTTP support */
933 if( ismult( psz_uri ) )
935 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
939 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
946 /***********************************************************************
947 * ParseSDP : SDP parsing
948 * *********************************************************************
949 * Validate SDP and parse all fields
950 ***********************************************************************/
951 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
955 if( psz_sdp == NULL )
960 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
962 msg_Warn( p_obj, "bad SDP packet" );
966 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
968 p_sdp->psz_sdp = strdup( psz_sdp );
970 p_sdp->psz_sessionname = NULL;
971 p_sdp->psz_media = NULL;
972 p_sdp->psz_connection = NULL;
975 p_sdp->i_attributes = 0;
976 p_sdp->pp_attributes = NULL;
978 while( *psz_sdp != '\0' )
985 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
986 *psz_sdp == ' ' || *psz_sdp == '\t' )
991 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
993 psz_eol = psz_sdp + strlen( psz_sdp );
995 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1000 if( psz_eol <= psz_sdp )
1006 /* no space allowed between fields */
1007 if( psz_sdp[1] != '=' )
1009 msg_Warn( p_obj, "invalid packet" ) ;
1014 /* Now parse each line */
1015 switch( psz_sdp[0] )
1020 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1024 /* o field is <username> <session id> <version>
1025 * <network type> <address type> <address> */
1027 #define GET_FIELD( store ) \
1028 psz_eof = strchr( psz_parse, ' ' ); \
1029 if( psz_eof ) { *psz_eof=0; store = strdup( psz_parse ); } \
1030 else { store = strdup( psz_parse );}; psz_parse = psz_eof + 1 ;
1032 psz_parse = &psz_sdp[2];
1033 GET_FIELD( p_sdp->psz_username );
1034 GET_FIELD( psz_sess_id );
1036 p_sdp->i_session_id = atoi( psz_sess_id );
1038 FREE( psz_sess_id );
1040 GET_FIELD( psz_sess_id );
1041 FREE( psz_sess_id );
1043 GET_FIELD( p_sdp->psz_network_type );
1044 GET_FIELD( p_sdp->psz_address_type );
1045 GET_FIELD( p_sdp->psz_address );
1056 case( 'a' ): /* attribute */
1058 char *psz_eon = strchr( &psz_sdp[2], ':' );
1060 attribute_t *p_attr = (attribute_t *)malloc(
1061 sizeof( attribute_t ) );
1063 /* Attribute with value */
1068 p_attr->psz_field = strdup( &psz_sdp[2] );
1069 p_attr->psz_value = strdup( psz_eon );
1071 else /* Attribute without value */
1073 p_attr->psz_field = strdup( &psz_sdp[2] );
1074 p_attr->psz_value = NULL;
1077 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1081 case( 'm' ): /* Media announcement */
1083 /* If we have several medias, we pass the announcement to
1084 * LIVE.COM, so just count them */
1086 if( p_sdp->i_media == 1 )
1088 p_sdp->psz_media = strdup( &psz_sdp[2] );
1095 if( p_sdp->i_media > 1 )
1098 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1113 /***********************************************************************
1114 * ismult: returns true if we have a multicast address
1115 ***********************************************************************/
1117 static int ismult( char *psz_uri )
1122 i_value = strtol( psz_uri, &psz_end, 0 );
1125 if( psz_uri[0] == '[')
1127 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1128 strncasecmp( &psz_uri[2], "FF0" , 3))
1131 return( VLC_FALSE );
1134 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1136 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1139 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port )
1141 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1145 INSERT_ELEM( p_sd->p_sys->pi_fd,
1152 return VLC_EGENERIC;
1156 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1158 int i_result, i_dstsize, n;
1159 unsigned char *psz_dst;
1162 d_stream.zalloc = (alloc_func)0;
1163 d_stream.zfree = (free_func)0;
1164 d_stream.opaque = (voidpf)0;
1166 i_result = inflateInit(&d_stream);
1167 if( i_result != Z_OK )
1169 printf( "inflateInit() failed. Result: %d\n", i_result );
1173 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1174 i_position = p_playlist->i_index;
1176 /* Gather the complete sdp file */
1179 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1181 d_stream.next_in = (Bytef *)psz_src;
1182 d_stream.avail_in = i_len;
1190 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1191 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1192 d_stream.avail_out = 1000;
1194 i_result = inflate(&d_stream, Z_NO_FLUSH);
1195 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1197 printf( "Zlib decompression failed. Result: %d\n", i_result );
1201 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1202 ( i_result != Z_STREAM_END ) );
1204 i_dstsize = d_stream.total_out;
1205 inflateEnd( &d_stream );
1207 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1214 static void FreeSDP( sdp_t *p_sdp )
1217 FREE( p_sdp->psz_sdp );
1218 FREE( p_sdp->psz_sessionname );
1219 FREE( p_sdp->psz_connection );
1220 FREE( p_sdp->psz_media );
1221 FREE( p_sdp->psz_uri );
1222 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1224 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1225 FREE( p_sdp->pp_attributes[i]->psz_field );
1226 FREE( p_sdp->pp_attributes[i]->psz_value );
1227 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1233 static int RemoveAnnounce( services_discovery_t *p_sd,
1234 sap_announce_t *p_announce )
1237 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1238 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1240 if( p_announce->p_sdp )
1242 FreeSDP( p_announce->p_sdp );
1247 return VLC_EGENERIC;
1250 if( p_announce->p_item )
1252 playlist_Delete( p_playlist, p_announce->p_item->input.i_id );
1255 vlc_object_release( p_playlist );
1262 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1264 /* A session is identified by
1265 * username, session_id, network type, address type and address */
1266 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1267 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1268 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1269 p_sdp1->psz_address && p_sdp2->psz_address )
1272 !strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1273 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1274 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1275 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1276 p_sdp1->i_session_id == p_sdp2->i_session_id )
1292 static void CacheLoad( services_discovery_t *p_sd )
1294 msg_Warn( p_sd, "Cache not implemented") ;
1297 static void CacheSave( services_discovery_t *p_sd )
1299 msg_Warn( p_sd, "Cache not implemented") ;