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"
58 #define SAP_V4_ADDRESS "0.0.0.0"
61 #define IPV6_ADDR_1 "FF0" /* Scope is inserted between them */
62 #define IPV6_ADDR_2 "::2:7FFE"
65 /*****************************************************************************
67 *****************************************************************************/
68 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
69 #define SAP_ADDR_LONGTEXT N_( "SAP multicast address" )
70 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
71 #define SAP_IPV4_LONGTEXT N_( \
72 "Set this if you want the SAP module to listen to IPv4 announces" )
73 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
74 #define SAP_IPV6_LONGTEXT N_( \
75 "Set this if you want the SAP module to listen to IPv6 announces" )
76 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
77 #define SAP_SCOPE_LONGTEXT N_( \
78 "Sets the scope for IPv6 announces (default is 8)" )
79 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
80 #define SAP_TIMEOUT_LONGTEXT N_( \
81 "Sets the time before SAP items get deleted if no new announce " \
83 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
84 #define SAP_PARSE_LONGTEXT N_( \
85 "When SAP can it will try to parse the SAP. If you don't select " \
86 "this, all announces will be parsed by the livedotcom module" )
87 #define SAP_CACHE_TEXT N_("Use SAP cache")
88 #define SAP_CACHE_LONGTEXT N_( \
89 "If this option is selected, a SAP caching mechanism will be used." \
90 "This will result in lower SAP startup time, but you could end up " \
91 "with items corresponding to legacy streams." )
94 static int Open ( vlc_object_t * );
95 static void Close( vlc_object_t * );
96 static int OpenDemux ( vlc_object_t * );
97 static void CloseDemux ( vlc_object_t * );
100 set_description( _("SAP interface") );
102 add_string( "sap-addr", NULL, NULL,
103 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
104 add_bool( "sap-ipv4", 1 , NULL,
105 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
106 add_bool( "sap-ipv6", 0 , NULL,
107 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
108 add_string( "sap-ipv6-scope", "8" , NULL,
109 SAP_SCOPE_TEXT, SAP_SCOPE_LONGTEXT, VLC_TRUE);
110 add_integer( "sap-timeout", 1800, NULL,
111 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
112 add_bool( "sap-parse", 1 , NULL,
113 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
114 add_bool( "sap-cache", 0 , NULL,
115 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
117 set_capability( "services_discovery", 0 );
118 set_callbacks( Open, Close );
121 set_description( _("SDP file parser for UDP") );
122 add_shortcut( "sdp" );
123 set_capability( "demux2", 51 );
124 set_callbacks( OpenDemux, CloseDemux );
128 /*****************************************************************************
130 *****************************************************************************/
132 typedef struct sdp_t sdp_t;
133 typedef struct attribute_t attribute_t;
134 typedef struct sap_announce_t sap_announce_t;
136 /* The structure that contains sdp information */
142 char *psz_sessionname;
144 /* Raw m= and c= fields */
145 char *psz_connection;
150 char *psz_network_type;
151 char *psz_address_type;
158 int i_in; /* IP version */
163 attribute_t **pp_attributes;
172 struct sap_announce_t
177 uint32_t i_source[4];
179 /* SAP annnounces must only contain one SDP */
182 playlist_item_t *p_item;
185 struct services_discovery_sys_t
187 /* Socket descriptors */
192 playlist_item_t *p_node;
194 /* Table of announces */
196 struct sap_announce_t **pp_announces;
205 /*****************************************************************************
207 *****************************************************************************/
211 static int Demux( demux_t *p_demux );
212 static int Control( demux_t *, int, va_list );
213 static void Run ( services_discovery_t *p_sd );
215 /* Main parsing functions */
216 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
217 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
218 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
219 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
220 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
223 static void CacheLoad( services_discovery_t *p_sd );
224 static void CacheSave( services_discovery_t *p_sd );
225 /* Helper functions */
226 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
227 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
228 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
230 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
231 static void FreeSDP( sdp_t *p_sdp );
234 /* Detect multicast addresses */
235 static int ismult( char * );
238 if( p ) { free( p ); (p) = NULL; }
239 /*****************************************************************************
240 * Open: initialize and create stuff
241 *****************************************************************************/
242 static int Open( vlc_object_t *p_this )
244 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
245 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
246 malloc( sizeof( services_discovery_sys_t ) );
248 playlist_t *p_playlist;
249 playlist_view_t *p_view;
251 p_sys->i_timeout = config_GetInt( p_sd,"sap-timeout" );
260 p_sys->b_strict = VLC_FALSE;
261 p_sys->b_parse = config_GetInt( p_sd, "sap-parse" );
263 if( config_GetInt( p_sd, "sap-cache" ) )
268 if( config_GetInt( p_sd, "sap-ipv4" ) )
270 InitSocket( p_sd, SAP_V4_ADDRESS, SAP_PORT );
272 if( config_GetInt( p_sd, "sap-ipv6" ) )
277 /* TODO : Handle additionnal adresses */
279 if( p_sys->i_fd == 0 )
281 msg_Err( p_sd, "unable to read on any address");
285 /* Create our playlist node */
286 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
290 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
294 p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
295 p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
296 _("SAP"), p_view->p_root );
298 vlc_object_release( p_playlist );
300 p_sys->i_announces = 0;
301 p_sys->pp_announces = NULL;
306 /*****************************************************************************
307 * OpenDemux: initialize and create stuff
308 *****************************************************************************/
309 static int OpenDemux( vlc_object_t *p_this )
311 demux_t *p_demux = (demux_t *)p_this;
317 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 )
319 msg_Err( p_demux, "cannot peek" );
322 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
323 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
324 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
326 msg_Warn( p_demux, "SDP (UDP) module discarded" );
333 p_demux->pf_control = Control;
334 p_demux->pf_demux = Demux;
339 /*****************************************************************************
341 *****************************************************************************/
342 static void Close( vlc_object_t *p_this )
344 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
345 services_discovery_sys_t *p_sys = p_sd->p_sys;
348 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
350 net_Close( p_sys->pi_fd[i] );
353 if( config_GetInt( p_sd, "sap-cache" ) )
358 for( i = p_sys->i_announces - 1; i>= 0; i-- )
360 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
366 /*****************************************************************************
367 * CloseDemux: Close the demuxer
368 *****************************************************************************/
369 static void CloseDemux( vlc_object_t *p_this )
374 /*****************************************************************************
375 * Run: main SAP thread
376 *****************************************************************************
377 * Listens to SAP packets, and sends them to packet_handle
378 *****************************************************************************/
379 #define MAX_SAP_BUFFER 5000
381 static void Run( services_discovery_t *p_sd )
384 /* Dirty hack to slow down the startup of the sap interface */
385 /* Unneeded now : our node is in no_select mode */
388 /* read SAP packets */
389 while( !p_sd->b_die )
391 p_buffer = (uint8_t *)malloc( MAX_SAP_BUFFER );
395 msg_Err( p_sd, "out of memory");
396 p_sd->b_die = VLC_TRUE;
400 int i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
401 p_sd->p_sys->i_fd, p_buffer,
402 MAX_SAP_BUFFER, 500000 );
404 /* Check for items that need deletion */
405 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
407 struct sap_announce_t *p_announce;
408 mtime_t i_timeout = ( mtime_t ) 1000000*p_sys->i_timeout;
409 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
411 msg_Dbg( p_sd,"Time out for %s, deleting (%i/%i)",
412 p_sd->p_sys->pp_announces[i]->psz_name,
413 i , p_sd->p_sys->i_announces );
415 /* Remove the playlist item */
416 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
420 int i_pos = playlist_GetPositionById( p_playlist,
421 p_sd->p_sys->pp_announces[i]->i_id );
422 playlist_Delete( p_playlist, i_pos );
423 vlc_object_release( p_playlist );
426 /* Free the p_announce */
427 p_announce = p_sd->p_sys->pp_announces[i];
428 if( p_announce->psz_name )
429 free( p_announce->psz_name );
430 if( p_announce->psz_uri )
431 free( p_announce->psz_uri );
433 /* Remove the sap_announce from the array */
434 REMOVE_ELEM( p_sd->p_sys->pp_announces,
435 p_sd->p_sys->i_announces,
444 /* Minimum length is > 6 */
449 msg_Warn( p_sd, "socket read error" );
455 p_buffer[i_read] = '\0';
457 /* Parse the packet */
458 ParseSAP( p_sd, p_buffer, i_read );
464 /**********************************************************************
465 * Demux: reads and demuxes data packets
466 * Return -1 if error, 0 if EOF, 1 else
467 **********************************************************************/
468 static int Demux( demux_t *p_demux )
470 int i_max_sdp = 1024;
472 char *psz_sdp = (char *)malloc( i_max_sdp );
475 playlist_t *p_playlist;
477 /* Gather the complete sdp file */
480 int i_read = stream_Read( p_demux->s,
481 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
487 msg_Err( p_demux, "failed to read SDP" );
493 if( i_read < i_max_sdp - i_sdp - 1 )
495 psz_sdp[i_sdp] = '\0';
500 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
503 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
505 if( !p_sdp ) return -1;
507 if( p_sdp->i_media > 1 )
512 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
514 p_sdp->psz_uri = NULL;
517 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
519 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
522 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
524 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
525 PLAYLIST_APPEND, PLAYLIST_END );
527 vlc_object_release( p_playlist );
535 static int Control( demux_t *p_demux, int i_query, va_list args )
540 /**************************************************************
542 **************************************************************/
544 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
546 int i_version, i_address_type, i_hash, i;
549 vlc_bool_t b_compressed;
550 vlc_bool_t b_need_delete = VLC_FALSE;
552 int i_decompressed_size;
553 uint8_t *p_decompressed_buffer;
556 /* First, check the sap announce is correct */
557 i_version = p_buffer[0] >> 5;
561 msg_Dbg( p_sd, "strange sap version %d found", i_version );
564 i_address_type = p_buffer[0] & 0x10;
566 if( (p_buffer[0] & 0x08) != 0 )
568 msg_Dbg( p_sd, "reserved bit incorrectly set" );
572 if( (p_buffer[0] & 0x04) != 0 )
574 msg_Dbg( p_sd, "session deletion packet" );
575 b_need_delete = VLC_TRUE;
578 if( p_buffer[0] & 0x02 )
580 msg_Dbg( p_sd, "encrypted packet, unsupported" );
584 b_compressed = p_buffer[0] & 0x01;
586 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
588 if( p_sd->p_sys->b_strict && i_hash == 0 )
590 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
594 psz_sdp = &p_buffer[4];
596 if( i_address_type == 0 ) /* ipv4 source address */
600 else /* ipv6 source address */
608 i_decompressed_size = Decompress( psz_sdp,
609 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
610 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
612 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
613 psz_sdp[i_decompressed_size] = '\0';
614 free( p_decompressed_buffer );
617 msg_Warn( p_sd, "Ignoring compressed sap packet" );
622 /* Add the size of authentification info */
623 psz_sdp += p_buffer[1];
625 /* Skip payload type */
626 /* Handle announces without \0 between SAP and SDP */
627 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
632 if( *psz_sdp == '\0' )
639 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
646 /* Decide whether we should add a playlist item for this SDP */
648 /* Multi-media or no-parse -> pass to LIVE.COM */
649 if( p_sdp->i_media > 1 || p_sd->p_sys->b_parse == VLC_FALSE )
651 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
655 /* Parse connection information (c= & m= ) */
656 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
658 p_sdp->psz_uri = NULL;
662 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
664 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
667 /* FIXME: we create a new announce each time the sdp changes */
668 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
672 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
677 p_sd->p_sys->pp_announces[i]->i_last = mdate();
684 if( p_sdp->i_media > 1 )
686 msg_Dbg( p_sd, "passing to LIVE.COM" );
689 CreateAnnounce( p_sd, i_hash, p_sdp );
694 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
697 playlist_t *p_playlist;
698 playlist_item_t *p_item, *p_child;
700 sap_announce_t *p_sap = (sap_announce_t *)malloc(
701 sizeof(sap_announce_t ) );
704 msg_Err( p_sd, "out of memory");
705 p_sd->b_die = VLC_TRUE;
708 p_sap->i_last = mdate();
709 p_sap->i_hash = i_hash;
710 p_sap->p_sdp = p_sdp;
711 p_sap->p_item = NULL;
713 /* Create the playlist item here */
714 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
715 p_sap->p_sdp->psz_sessionname );
722 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
724 if( psz_value == NULL )
726 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
729 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
733 msg_Err( p_sd, "playlist not found" );
739 if( psz_value != NULL )
741 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
743 if( p_child == NULL )
745 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
746 psz_value, p_sd->p_sys->p_node );
751 p_child = p_sd->p_sys->p_node;
754 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
756 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
757 PLAYLIST_APPEND, PLAYLIST_END );
759 vlc_object_release( p_playlist );
761 p_sap->p_item = p_item;
763 TAB_APPEND( p_sd->p_sys->i_announces,
764 p_sd->p_sys->pp_announces,
770 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
774 for( i = 0 ; i< p_sdp->i_attributes; i++ )
776 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
777 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
779 return p_sdp->pp_attributes[i]->psz_value;
786 /* Fill p_sdp->psz_uri */
787 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
791 char *psz_uri = NULL;
792 char *psz_proto = NULL;
796 if( p_sdp->psz_connection )
798 psz_parse = p_sdp->psz_connection;
800 psz_eof = strchr( psz_parse, ' ' );
805 psz_parse = psz_eof + 1;
809 msg_Warn( p_obj, "unable to parse c field (1)");
813 psz_eof = strchr( psz_parse, ' ' );
818 if( !strncmp( psz_parse, "IP4", 3 ) )
822 else if( !strncmp( psz_parse, "IP6", 3 ) )
830 psz_parse = psz_eof + 1;
834 msg_Warn( p_obj, "unable to parse c field (2)");
838 psz_eof = strchr( psz_parse, '/' );
843 psz_uri = strdup( psz_parse );
848 msg_Warn( p_obj, "unable to parse c field (3)");
855 if( p_sdp->psz_media )
857 psz_parse = p_sdp->psz_media;
859 psz_eof = strchr( psz_parse, ' ' );
865 if( strncmp( psz_parse, "audio", 5 ) &&
866 strncmp( psz_parse, "video",5 ) )
868 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
873 psz_parse = psz_eof + 1;
877 msg_Warn( p_obj, "unable to parse m field (1)");
882 psz_eof = strchr( psz_parse, ' ' );
888 /* FIXME : multiple port ! */
889 i_port = atoi( psz_parse );
891 if( i_port <= 0 || i_port >= 65536 )
893 msg_Warn( p_obj, "invalid transport port %i", i_port );
896 psz_parse = psz_eof + 1;
900 msg_Warn( p_obj, "unable to parse m field (2)");
905 psz_eof = strchr( psz_parse, ' ' );
911 psz_proto = strdup( psz_parse );
915 msg_Warn( p_obj, "unable to parse m field (3)");
920 /* FIXME: HTTP support */
927 if( ismult( psz_uri ) )
929 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
933 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
940 /***********************************************************************
941 * ParseSDP : SDP parsing
942 * *********************************************************************
943 * Validate SDP and parse all fields
944 ***********************************************************************/
945 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
949 if( psz_sdp == NULL )
954 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
956 msg_Warn( p_obj, "bad SDP packet" );
960 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
962 p_sdp->psz_sdp = strdup( psz_sdp );
964 p_sdp->psz_sessionname = NULL;
965 p_sdp->psz_media = NULL;
966 p_sdp->psz_connection = NULL;
969 p_sdp->i_attributes = 0;
970 p_sdp->pp_attributes = NULL;
972 while( *psz_sdp != '\0' )
979 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
980 *psz_sdp == ' ' || *psz_sdp == '\t' )
985 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
987 psz_eol = psz_sdp + strlen( psz_sdp );
989 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
994 if( psz_eol <= psz_sdp )
1000 /* no space allowed between fields */
1001 if( psz_sdp[1] != '=' )
1003 msg_Warn( p_obj, "invalid packet" ) ;
1008 /* Now parse each line */
1009 switch( psz_sdp[0] )
1014 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1018 /* o field is <username> <session id> <version>
1019 * <network type> <address type> <address> */
1021 #define GET_FIELD( store ) \
1022 psz_eof = strchr( psz_parse, ' ' ); \
1023 if( psz_eof ) { *psz_eof=0; store = strdup( psz_parse ); } \
1024 else { store = strdup( psz_parse );}; psz_parse = psz_eof + 1 ;
1026 psz_parse = &psz_sdp[2];
1027 GET_FIELD( p_sdp->psz_username );
1028 GET_FIELD( psz_sess_id );
1030 p_sdp->i_session_id = atoi( psz_sess_id );
1032 FREE( psz_sess_id );
1034 GET_FIELD( psz_sess_id );
1035 FREE( psz_sess_id );
1037 GET_FIELD( p_sdp->psz_network_type );
1038 GET_FIELD( p_sdp->psz_address_type );
1039 GET_FIELD( p_sdp->psz_address );
1050 case( 'a' ): /* attribute */
1052 char *psz_eon = strchr( &psz_sdp[2], ':' );
1054 attribute_t *p_attr = (attribute_t *)malloc(
1055 sizeof( attribute_t ) );
1057 /* Attribute with value */
1062 p_attr->psz_field = strdup( &psz_sdp[2] );
1063 p_attr->psz_value = strdup( psz_eon );
1065 else /* Attribute without value */
1067 p_attr->psz_field = strdup( &psz_sdp[2] );
1068 p_attr->psz_value = NULL;
1071 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1075 case( 'm' ): /* Media announcement */
1077 /* If we have several medias, we pass the announcement to
1078 * LIVE.COM, so just count them */
1080 if( p_sdp->i_media == 1 )
1082 p_sdp->psz_media = strdup( &psz_sdp[2] );
1089 if( p_sdp->i_media > 1 )
1092 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1107 /***********************************************************************
1108 * ismult: returns true if we have a multicast address
1109 ***********************************************************************/
1111 static int ismult( char *psz_uri )
1116 i_value = strtol( psz_uri, &psz_end, 0 );
1119 if( psz_uri[0] == '[')
1121 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1122 strncasecmp( &psz_uri[2], "FF0" , 3))
1125 return( VLC_FALSE );
1128 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1130 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1133 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port )
1135 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1139 INSERT_ELEM( p_sd->p_sys->pi_fd,
1146 return VLC_EGENERIC;
1150 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1152 int i_result, i_dstsize, n;
1153 unsigned char *psz_dst;
1156 d_stream.zalloc = (alloc_func)0;
1157 d_stream.zfree = (free_func)0;
1158 d_stream.opaque = (voidpf)0;
1160 i_result = inflateInit(&d_stream);
1161 if( i_result != Z_OK )
1163 printf( "inflateInit() failed. Result: %d\n", i_result );
1167 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1168 i_position = p_playlist->i_index;
1170 /* Gather the complete sdp file */
1173 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1175 d_stream.next_in = (Bytef *)psz_src;
1176 d_stream.avail_in = i_len;
1184 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1185 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1186 d_stream.avail_out = 1000;
1188 i_result = inflate(&d_stream, Z_NO_FLUSH);
1189 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1191 printf( "Zlib decompression failed. Result: %d\n", i_result );
1195 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1196 ( i_result != Z_STREAM_END ) );
1198 i_dstsize = d_stream.total_out;
1199 inflateEnd( &d_stream );
1201 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1208 static void FreeSDP( sdp_t *p_sdp )
1211 FREE( p_sdp->psz_sdp );
1212 FREE( p_sdp->psz_sessionname );
1213 FREE( p_sdp->psz_connection );
1214 FREE( p_sdp->psz_media );
1215 FREE( p_sdp->psz_uri );
1216 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1218 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1219 FREE( p_sdp->pp_attributes[i]->psz_field );
1220 FREE( p_sdp->pp_attributes[i]->psz_value );
1221 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1227 static int RemoveAnnounce( services_discovery_t *p_sd,
1228 sap_announce_t *p_announce )
1231 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1232 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1234 if( p_announce->p_sdp )
1236 FreeSDP( p_announce->p_sdp );
1241 return VLC_EGENERIC;
1244 if( p_announce->p_item )
1246 playlist_Delete( p_playlist, p_announce->p_item->input.i_id );
1249 vlc_object_release( p_playlist );
1256 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1258 /* A session is identified by
1259 * username, session_id, network type, address type and address */
1260 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1261 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1262 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1263 p_sdp1->psz_address && p_sdp2->psz_address )
1266 !strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1267 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1268 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1269 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1270 p_sdp1->i_session_id == p_sdp2->i_session_id )
1286 static void CacheLoad( services_discovery_t *p_sd )
1288 msg_Warn( p_sd, "Cache not implemented") ;
1291 static void CacheSave( services_discovery_t *p_sd )
1293 msg_Warn( p_sd, "Cache not implemented") ;