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_( "Listen for SAP announces on another 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 "on the standard address" )
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 "on the standard address" )
77 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
78 #define SAP_SCOPE_LONGTEXT N_( \
79 "Sets the scope for IPv6 announces (default is 8)" )
80 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
81 #define SAP_TIMEOUT_LONGTEXT N_( \
82 "Sets the time before SAP items get deleted if no new announce " \
84 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
85 #define SAP_PARSE_LONGTEXT N_( \
86 "When SAP can it will try to parse the SAP. If you don't select " \
87 "this, all announces will be parsed by the livedotcom module" )
88 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
89 #define SAP_STRICT_LONGTEXT N_( \
90 "When this is set, the SAP parser will discard some non-compliant " \
92 #define SAP_CACHE_TEXT N_("Use SAP cache")
93 #define SAP_CACHE_LONGTEXT N_( \
94 "If this option is selected, a SAP caching mechanism will be used." \
95 "This will result in lower SAP startup time, but you could end up " \
96 "with items corresponding to legacy streams." )
99 static int Open ( vlc_object_t * );
100 static void Close( vlc_object_t * );
101 static int OpenDemux ( vlc_object_t * );
102 static void CloseDemux ( vlc_object_t * );
105 set_description( _("SAP interface") );
107 add_string( "sap-addr", NULL, NULL,
108 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
109 add_bool( "sap-ipv4", 1 , NULL,
110 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
111 add_bool( "sap-ipv6", 0 , NULL,
112 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
113 add_string( "sap-ipv6-scope", "8" , NULL,
114 SAP_SCOPE_TEXT, SAP_SCOPE_LONGTEXT, VLC_TRUE);
115 add_integer( "sap-timeout", 1800, NULL,
116 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
117 add_bool( "sap-parse", 1 , NULL,
118 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
119 add_bool( "sap-strict", 0 , NULL,
120 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
121 add_bool( "sap-cache", 0 , NULL,
122 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
124 set_capability( "services_discovery", 0 );
125 set_callbacks( Open, Close );
128 set_description( _("SDP file parser for UDP") );
129 add_shortcut( "sdp" );
130 set_capability( "demux2", 51 );
131 set_callbacks( OpenDemux, CloseDemux );
135 /*****************************************************************************
137 *****************************************************************************/
139 typedef struct sdp_t sdp_t;
140 typedef struct attribute_t attribute_t;
141 typedef struct sap_announce_t sap_announce_t;
143 /* The structure that contains sdp information */
149 char *psz_sessionname;
151 /* Raw m= and c= fields */
152 char *psz_connection;
157 char *psz_network_type;
158 char *psz_address_type;
160 int64_t i_session_id;
165 int i_in; /* IP version */
170 attribute_t **pp_attributes;
179 struct sap_announce_t
184 uint32_t i_source[4];
186 /* SAP annnounces must only contain one SDP */
189 playlist_item_t *p_item;
192 struct services_discovery_sys_t
194 /* Socket descriptors */
199 playlist_item_t *p_node;
201 /* Table of announces */
203 struct sap_announce_t **pp_announces;
212 /*****************************************************************************
214 *****************************************************************************/
218 static int Demux( demux_t *p_demux );
219 static int Control( demux_t *, int, va_list );
220 static void Run ( services_discovery_t *p_sd );
222 /* Main parsing functions */
223 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
224 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
225 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
226 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
227 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
230 static void CacheLoad( services_discovery_t *p_sd );
231 static void CacheSave( services_discovery_t *p_sd );
232 /* Helper functions */
233 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
234 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
235 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
237 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
238 static void FreeSDP( sdp_t *p_sdp );
241 /* Detect multicast addresses */
242 static int ismult( char * );
245 if( p ) { free( p ); (p) = NULL; }
246 /*****************************************************************************
247 * Open: initialize and create stuff
248 *****************************************************************************/
249 static int Open( vlc_object_t *p_this )
251 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
252 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
253 malloc( sizeof( services_discovery_sys_t ) );
255 playlist_t *p_playlist;
256 playlist_view_t *p_view;
260 p_sys->i_timeout = config_GetInt( p_sd,"sap-timeout" );
268 p_sys->b_strict = config_GetInt( p_sd, "sap-strict");
269 p_sys->b_parse = config_GetInt( p_sd, "sap-parse" );
271 if( config_GetInt( p_sd, "sap-cache" ) )
276 if( config_GetInt( p_sd, "sap-ipv4" ) )
278 InitSocket( p_sd, SAP_V4_ADDRESS, SAP_PORT );
280 if( config_GetInt( p_sd, "sap-ipv6" ) )
282 /* [ + 8x4+7*':' + ] */
283 char psz_address[42];
285 char *psz_scope = config_GetPsz( p_sd, "sap-ipv6-scope" );
287 if( psz_scope == NULL || *psz_scope == '\0')
293 c_scope = psz_scope[0];
295 snprintf( psz_address, 42, "[%s%c%s]", IPV6_ADDR_1, c_scope,
297 InitSocket( p_sd, psz_address, SAP_PORT );
300 psz_addr = config_GetPsz( p_sd, "sap-addr" );
301 if( psz_addr && *psz_addr )
303 InitSocket( p_sd, psz_addr, SAP_PORT );
306 if( p_sys->i_fd == 0 )
308 msg_Err( p_sd, "unable to read on any address");
312 /* Create our playlist node */
313 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
317 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
321 p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
322 p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
323 _("SAP"), p_view->p_root );
324 val.b_bool = VLC_TRUE;
325 var_Set( p_playlist, "intf-change", val );
327 vlc_object_release( p_playlist );
329 p_sys->i_announces = 0;
330 p_sys->pp_announces = NULL;
335 /*****************************************************************************
336 * OpenDemux: initialize and create stuff
337 *****************************************************************************/
338 static int OpenDemux( vlc_object_t *p_this )
340 demux_t *p_demux = (demux_t *)p_this;
346 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 )
348 msg_Err( p_demux, "cannot peek" );
351 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
352 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
353 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
355 msg_Warn( p_demux, "SDP (UDP) module discarded" );
360 p_demux->pf_control = Control;
361 p_demux->pf_demux = Demux;
366 /*****************************************************************************
368 *****************************************************************************/
369 static void Close( vlc_object_t *p_this )
371 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
372 services_discovery_sys_t *p_sys = p_sd->p_sys;
374 playlist_t *p_playlist;
377 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
379 net_Close( p_sys->pi_fd[i] );
382 if( config_GetInt( p_sd, "sap-cache" ) )
387 for( i = p_sys->i_announces - 1; i>= 0; i-- )
389 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
392 p_playlist = (playlist_t *) vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
397 playlist_NodeDelete( p_playlist, p_sys->p_node, VLC_TRUE );
398 vlc_object_release( p_playlist );
404 /*****************************************************************************
405 * CloseDemux: Close the demuxer
406 *****************************************************************************/
407 static void CloseDemux( vlc_object_t *p_this )
412 /*****************************************************************************
413 * Run: main SAP thread
414 *****************************************************************************
415 * Listens to SAP packets, and sends them to packet_handle
416 *****************************************************************************/
417 #define MAX_SAP_BUFFER 5000
419 static void Run( services_discovery_t *p_sd )
422 /* Dirty hack to slow down the startup of the sap interface */
423 /* Unneeded now : our node is in no_select mode */
426 /* read SAP packets */
427 while( !p_sd->b_die )
429 p_buffer = (uint8_t *)malloc( MAX_SAP_BUFFER );
433 msg_Err( p_sd, "out of memory");
434 p_sd->b_die = VLC_TRUE;
438 int i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
439 p_sd->p_sys->i_fd, p_buffer,
440 MAX_SAP_BUFFER, 500000 );
442 /* Check for items that need deletion */
443 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
445 struct sap_announce_t *p_announce;
446 mtime_t i_timeout = ( mtime_t ) 1000000*p_sys->i_timeout;
447 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
449 msg_Dbg( p_sd,"Time out for %s, deleting (%i/%i)",
450 p_sd->p_sys->pp_announces[i]->psz_name,
451 i , p_sd->p_sys->i_announces );
453 /* Remove the playlist item */
454 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
458 int i_pos = playlist_GetPositionById( p_playlist,
459 p_sd->p_sys->pp_announces[i]->i_id );
460 playlist_Delete( p_playlist, i_pos );
461 vlc_object_release( p_playlist );
464 /* Free the p_announce */
465 p_announce = p_sd->p_sys->pp_announces[i];
466 if( p_announce->psz_name )
467 free( p_announce->psz_name );
468 if( p_announce->psz_uri )
469 free( p_announce->psz_uri );
471 /* Remove the sap_announce from the array */
472 REMOVE_ELEM( p_sd->p_sys->pp_announces,
473 p_sd->p_sys->i_announces,
482 /* Minimum length is > 6 */
487 msg_Warn( p_sd, "socket read error" );
493 p_buffer[i_read] = '\0';
495 /* Parse the packet */
496 ParseSAP( p_sd, p_buffer, i_read );
502 /**********************************************************************
503 * Demux: reads and demuxes data packets
504 * Return -1 if error, 0 if EOF, 1 else
505 **********************************************************************/
506 static int Demux( demux_t *p_demux )
508 int i_max_sdp = 1024;
510 char *psz_sdp = (char *)malloc( i_max_sdp );
513 playlist_t *p_playlist;
520 /* Gather the complete sdp file */
523 int i_read = stream_Read( p_demux->s,
524 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
529 msg_Err( p_demux, "failed to read SDP" );
535 if( i_read < i_max_sdp - i_sdp - 1 )
537 psz_sdp[i_sdp] = '\0';
542 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
545 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
549 msg_Warn( p_demux, "invalid SDP");
553 if( p_sdp->i_media > 1 )
558 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
560 p_sdp->psz_uri = NULL;
563 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
565 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
568 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
570 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
571 PLAYLIST_APPEND, PLAYLIST_END );
573 vlc_object_release( p_playlist );
581 static int Control( demux_t *p_demux, int i_query, va_list args )
586 /**************************************************************
588 **************************************************************/
590 /* i_read is at least > 6 */
591 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
593 int i_version, i_address_type, i_hash, i;
595 uint8_t *psz_initial_sdp;
597 vlc_bool_t b_compressed;
598 vlc_bool_t b_need_delete = VLC_FALSE;
600 int i_decompressed_size;
601 uint8_t *p_decompressed_buffer;
604 /* First, check the sap announce is correct */
605 i_version = p_buffer[0] >> 5;
609 msg_Dbg( p_sd, "strange sap version %d found", i_version );
612 i_address_type = p_buffer[0] & 0x10;
614 if( (p_buffer[0] & 0x08) != 0 )
616 msg_Dbg( p_sd, "reserved bit incorrectly set" );
620 if( (p_buffer[0] & 0x04) != 0 )
622 msg_Dbg( p_sd, "session deletion packet" );
623 b_need_delete = VLC_TRUE;
626 if( p_buffer[0] & 0x02 )
628 msg_Dbg( p_sd, "encrypted packet, unsupported" );
632 b_compressed = p_buffer[0] & 0x01;
634 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
636 if( p_sd->p_sys->b_strict && i_hash == 0 )
638 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
642 psz_sdp = &p_buffer[4];
643 psz_initial_sdp = psz_sdp;
645 if( i_address_type == 0 ) /* ipv4 source address */
650 msg_Warn( p_sd,"too short SAP packet\n" );
654 else /* ipv6 source address */
659 msg_Warn( p_sd,"too short SAP packet\n" );
667 i_decompressed_size = Decompress( psz_sdp,
668 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
669 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
671 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
672 psz_sdp[i_decompressed_size] = '\0';
673 free( p_decompressed_buffer );
676 msg_Warn( p_sd, "Ignoring compressed sap packet" );
681 /* Add the size of authentification info */
682 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
684 msg_Warn( p_sd, "too short SAP packet\n");
687 psz_sdp += p_buffer[1];
689 /* Skip payload type */
690 /* Handle announces without \0 between SAP and SDP */
691 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
693 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
695 msg_Warn( p_sd, "empty SDP ?");
700 if( *psz_sdp == '\0' )
706 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
713 /* Decide whether we should add a playlist item for this SDP */
715 /* Multi-media or no-parse -> pass to LIVE.COM */
716 if( p_sdp->i_media > 1 || p_sd->p_sys->b_parse == VLC_FALSE )
718 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
722 /* Parse connection information (c= & m= ) */
723 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
725 p_sdp->psz_uri = NULL;
729 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
731 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
734 /* FIXME: we create a new announce each time the sdp changes */
735 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
739 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
744 p_sd->p_sys->pp_announces[i]->i_last = mdate();
751 if( p_sdp->i_media > 1 )
753 msg_Dbg( p_sd, "passing to LIVE.COM" );
756 CreateAnnounce( p_sd, i_hash, p_sdp );
761 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
764 playlist_t *p_playlist;
765 playlist_item_t *p_item, *p_child;
767 sap_announce_t *p_sap = (sap_announce_t *)malloc(
768 sizeof(sap_announce_t ) );
771 msg_Err( p_sd, "out of memory");
772 p_sd->b_die = VLC_TRUE;
775 p_sap->i_last = mdate();
776 p_sap->i_hash = i_hash;
777 p_sap->p_sdp = p_sdp;
778 p_sap->p_item = NULL;
780 /* Create the playlist item here */
781 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
782 p_sap->p_sdp->psz_sessionname );
789 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
791 if( psz_value == NULL )
793 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
796 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
800 msg_Err( p_sd, "playlist not found" );
806 if( psz_value != NULL )
808 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
810 if( p_child == NULL )
812 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
813 psz_value, p_sd->p_sys->p_node );
818 p_child = p_sd->p_sys->p_node;
821 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
823 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
824 PLAYLIST_APPEND, PLAYLIST_END );
826 vlc_object_release( p_playlist );
828 p_sap->p_item = p_item;
830 TAB_APPEND( p_sd->p_sys->i_announces,
831 p_sd->p_sys->pp_announces,
837 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
841 for( i = 0 ; i< p_sdp->i_attributes; i++ )
843 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
844 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
846 return p_sdp->pp_attributes[i]->psz_value;
853 /* Fill p_sdp->psz_uri */
854 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
858 char *psz_uri = NULL;
859 char *psz_proto = NULL;
863 if( p_sdp->psz_connection )
865 psz_parse = p_sdp->psz_connection;
867 psz_eof = strchr( psz_parse, ' ' );
872 psz_parse = psz_eof + 1;
876 msg_Warn( p_obj, "unable to parse c field (1)");
880 psz_eof = strchr( psz_parse, ' ' );
885 if( !strncmp( psz_parse, "IP4", 3 ) )
889 else if( !strncmp( psz_parse, "IP6", 3 ) )
897 psz_parse = psz_eof + 1;
901 msg_Warn( p_obj, "unable to parse c field (2)");
905 psz_eof = strchr( psz_parse, '/' );
913 msg_Dbg( p_obj, "incorrect c field");
915 psz_uri = strdup( psz_parse );
920 if( p_sdp->psz_media )
922 psz_parse = p_sdp->psz_media;
924 psz_eof = strchr( psz_parse, ' ' );
930 if( strncmp( psz_parse, "audio", 5 ) &&
931 strncmp( psz_parse, "video",5 ) )
933 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
938 psz_parse = psz_eof + 1;
942 msg_Warn( p_obj, "unable to parse m field (1)");
947 psz_eof = strchr( psz_parse, ' ' );
953 /* FIXME : multiple port ! */
954 i_port = atoi( psz_parse );
956 if( i_port <= 0 || i_port >= 65536 )
958 msg_Warn( p_obj, "invalid transport port %i", i_port );
961 psz_parse = psz_eof + 1;
965 msg_Warn( p_obj, "unable to parse m field (2)");
970 psz_eof = strchr( psz_parse, ' ' );
978 msg_Dbg( p_obj, "incorrect m field");
980 psz_proto = strdup( psz_parse );
983 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
986 psz_proto = strdup( "rtp" );
988 if( psz_proto && !strncmp( psz_proto, "UDP", 3 ) )
991 psz_proto = strdup( "udp" );
995 /* FIXME: HTTP support */
1002 if( ismult( psz_uri ) )
1004 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1008 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1015 /***********************************************************************
1016 * ParseSDP : SDP parsing
1017 * *********************************************************************
1018 * Validate SDP and parse all fields
1019 ***********************************************************************/
1020 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1023 vlc_bool_t b_invalid = VLC_FALSE;
1024 vlc_bool_t b_end = VLC_FALSE;
1026 if( psz_sdp == NULL )
1031 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1033 msg_Warn( p_obj, "bad SDP packet, begins with 0x%x(%c) 0x%x(%c)",
1034 psz_sdp[0],psz_sdp[0],psz_sdp[1],psz_sdp[1]);
1038 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1040 p_sdp->psz_sdp = strdup( psz_sdp );
1042 p_sdp->psz_sessionname = NULL;
1043 p_sdp->psz_media = NULL;
1044 p_sdp->psz_connection = NULL;
1045 p_sdp->psz_uri = NULL;
1046 p_sdp->psz_address = NULL;
1047 p_sdp->psz_address_type= NULL;
1050 p_sdp->i_attributes = 0;
1051 p_sdp->pp_attributes = NULL;
1053 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1060 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1061 *psz_sdp == ' ' || *psz_sdp == '\t' )
1066 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1068 psz_eol = psz_sdp + strlen( psz_sdp );
1071 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1076 if( psz_eol <= psz_sdp )
1082 /* no space allowed between fields */
1083 if( psz_sdp[1] != '=' )
1085 msg_Warn( p_obj, "invalid packet" ) ;
1090 /* Now parse each line */
1091 switch( psz_sdp[0] )
1096 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1101 /* o field is <username> <session id> <version>
1102 * <network type> <address type> <address> */
1104 #define GET_FIELD( store ) \
1105 psz_eof = strchr( psz_parse, ' ' ); \
1108 *psz_eof=0; store = strdup( psz_parse ); \
1112 if( i_field != 5 ) \
1114 b_invalid = VLC_TRUE; break; \
1118 store = strdup( psz_parse ); \
1121 psz_parse = psz_eof + 1; i_field++;
1124 psz_parse = &psz_sdp[2];
1125 GET_FIELD( p_sdp->psz_username );
1126 GET_FIELD( psz_sess_id );
1128 p_sdp->i_session_id = atoll( psz_sess_id );
1130 FREE( psz_sess_id );
1132 GET_FIELD( psz_sess_id );
1133 FREE( psz_sess_id );
1135 GET_FIELD( p_sdp->psz_network_type );
1136 GET_FIELD( p_sdp->psz_address_type );
1137 GET_FIELD( p_sdp->psz_address );
1148 case( 'a' ): /* attribute */
1150 char *psz_eon = strchr( &psz_sdp[2], ':' );
1152 attribute_t *p_attr = (attribute_t *)malloc(
1153 sizeof( attribute_t ) );
1155 /* Attribute with value */
1160 p_attr->psz_field = strdup( &psz_sdp[2] );
1161 p_attr->psz_value = strdup( psz_eon );
1163 else /* Attribute without value */
1165 p_attr->psz_field = strdup( &psz_sdp[2] );
1166 p_attr->psz_value = NULL;
1169 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1173 case( 'm' ): /* Media announcement */
1175 /* If we have several medias, we pass the announcement to
1176 * LIVE.COM, so just count them */
1178 if( p_sdp->i_media == 1 )
1180 p_sdp->psz_media = strdup( &psz_sdp[2] );
1187 if( p_sdp->i_media > 1 )
1190 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1211 /***********************************************************************
1212 * ismult: returns true if we have a multicast address
1213 ***********************************************************************/
1215 static int ismult( char *psz_uri )
1220 i_value = strtol( psz_uri, &psz_end, 0 );
1223 if( psz_uri[0] == '[')
1225 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1226 strncasecmp( &psz_uri[2], "FF0" , 3))
1229 return( VLC_FALSE );
1232 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1234 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1237 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port )
1239 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1243 INSERT_ELEM( p_sd->p_sys->pi_fd,
1250 return VLC_EGENERIC;
1254 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1256 int i_result, i_dstsize, n;
1257 unsigned char *psz_dst;
1260 d_stream.zalloc = (alloc_func)0;
1261 d_stream.zfree = (free_func)0;
1262 d_stream.opaque = (voidpf)0;
1264 i_result = inflateInit(&d_stream);
1265 if( i_result != Z_OK )
1267 printf( "inflateInit() failed. Result: %d\n", i_result );
1271 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1272 i_position = p_playlist->i_index;
1274 /* Gather the complete sdp file */
1277 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1279 d_stream.next_in = (Bytef *)psz_src;
1280 d_stream.avail_in = i_len;
1288 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1289 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1290 d_stream.avail_out = 1000;
1292 i_result = inflate(&d_stream, Z_NO_FLUSH);
1293 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1295 printf( "Zlib decompression failed. Result: %d\n", i_result );
1299 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1300 ( i_result != Z_STREAM_END ) );
1302 i_dstsize = d_stream.total_out;
1303 inflateEnd( &d_stream );
1305 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1312 static void FreeSDP( sdp_t *p_sdp )
1315 FREE( p_sdp->psz_sdp );
1316 FREE( p_sdp->psz_sessionname );
1317 FREE( p_sdp->psz_connection );
1318 FREE( p_sdp->psz_media );
1319 FREE( p_sdp->psz_uri );
1321 FREE( p_sdp->psz_address );
1322 FREE( p_sdp->psz_address_type );
1324 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1326 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1327 FREE( p_sdp->pp_attributes[i]->psz_field );
1328 FREE( p_sdp->pp_attributes[i]->psz_value );
1329 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1335 static int RemoveAnnounce( services_discovery_t *p_sd,
1336 sap_announce_t *p_announce )
1339 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1340 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1342 if( p_announce->p_sdp )
1344 FreeSDP( p_announce->p_sdp );
1349 return VLC_EGENERIC;
1352 if( p_announce->p_item )
1354 playlist_Delete( p_playlist, p_announce->p_item->input.i_id );
1357 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1359 if( p_sd->p_sys->pp_announces[i] == p_announce )
1361 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1367 vlc_object_release( p_playlist );
1374 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1376 /* A session is identified by
1377 * username, session_id, network type, address type and address */
1378 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1379 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1380 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1381 p_sdp1->psz_address && p_sdp2->psz_address )
1384 !strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1385 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1386 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1387 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1388 p_sdp1->i_session_id == p_sdp2->i_session_id )
1404 static void CacheLoad( services_discovery_t *p_sd )
1406 msg_Warn( p_sd, "Cache not implemented") ;
1409 static void CacheSave( services_discovery_t *p_sd )
1411 msg_Warn( p_sd, "Cache not implemented") ;