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 )
430 p_buffer = (uint8_t *)malloc( MAX_SAP_BUFFER );
434 msg_Err( p_sd, "out of memory");
435 p_sd->b_die = VLC_TRUE;
439 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
440 p_sd->p_sys->i_fd, p_buffer,
441 MAX_SAP_BUFFER, 500000 );
443 /* Check for items that need deletion */
444 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
446 struct sap_announce_t *p_announce;
447 mtime_t i_timeout = ( mtime_t ) 1000000*p_sys->i_timeout;
448 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
450 msg_Dbg( p_sd,"Time out for %s, deleting (%i/%i)",
451 p_sd->p_sys->pp_announces[i]->psz_name,
452 i , p_sd->p_sys->i_announces );
454 /* Remove the playlist item */
455 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
459 int i_pos = playlist_GetPositionById( p_playlist,
460 p_sd->p_sys->pp_announces[i]->i_id );
461 playlist_Delete( p_playlist, i_pos );
462 vlc_object_release( p_playlist );
465 /* Free the p_announce */
466 p_announce = p_sd->p_sys->pp_announces[i];
467 if( p_announce->psz_name )
468 free( p_announce->psz_name );
469 if( p_announce->psz_uri )
470 free( p_announce->psz_uri );
472 /* Remove the sap_announce from the array */
473 REMOVE_ELEM( p_sd->p_sys->pp_announces,
474 p_sd->p_sys->i_announces, i );
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;
515 if( !psz_sdp ) return -1;
517 /* Gather the complete sdp file */
520 int i_read = stream_Read( p_demux->s,
521 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
526 msg_Err( p_demux, "failed to read SDP" );
532 if( i_read < i_max_sdp - i_sdp - 1 )
534 psz_sdp[i_sdp] = '\0';
539 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
542 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
546 msg_Warn( p_demux, "invalid SDP");
550 if( p_sdp->i_media > 1 )
555 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
557 p_sdp->psz_uri = NULL;
560 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
562 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
565 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
567 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
568 PLAYLIST_APPEND, PLAYLIST_END );
570 vlc_object_release( p_playlist );
578 static int Control( demux_t *p_demux, int i_query, va_list args )
583 /**************************************************************
585 **************************************************************/
587 /* i_read is at least > 6 */
588 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
590 int i_version, i_address_type, i_hash, i;
592 uint8_t *psz_initial_sdp;
594 vlc_bool_t b_compressed;
595 vlc_bool_t b_need_delete = VLC_FALSE;
597 int i_decompressed_size;
598 uint8_t *p_decompressed_buffer;
601 /* First, check the sap announce is correct */
602 i_version = p_buffer[0] >> 5;
606 msg_Dbg( p_sd, "strange sap version %d found", i_version );
609 i_address_type = p_buffer[0] & 0x10;
611 if( (p_buffer[0] & 0x08) != 0 )
613 msg_Dbg( p_sd, "reserved bit incorrectly set" );
617 if( (p_buffer[0] & 0x04) != 0 )
619 msg_Dbg( p_sd, "session deletion packet" );
620 b_need_delete = VLC_TRUE;
623 if( p_buffer[0] & 0x02 )
625 msg_Dbg( p_sd, "encrypted packet, unsupported" );
629 b_compressed = p_buffer[0] & 0x01;
631 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
633 if( p_sd->p_sys->b_strict && i_hash == 0 )
635 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
639 psz_sdp = &p_buffer[4];
640 psz_initial_sdp = psz_sdp;
642 if( i_address_type == 0 ) /* ipv4 source address */
647 msg_Warn( p_sd,"too short SAP packet\n" );
651 else /* ipv6 source address */
656 msg_Warn( p_sd,"too short SAP packet\n" );
664 i_decompressed_size = Decompress( psz_sdp,
665 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
666 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
668 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
669 psz_sdp[i_decompressed_size] = '\0';
670 free( p_decompressed_buffer );
673 msg_Warn( p_sd, "Ignoring compressed sap packet" );
678 /* Add the size of authentification info */
679 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
681 msg_Warn( p_sd, "too short SAP packet\n");
684 psz_sdp += p_buffer[1];
686 /* Skip payload type */
687 /* Handle announces without \0 between SAP and SDP */
688 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
690 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
692 msg_Warn( p_sd, "empty SDP ?");
697 if( *psz_sdp == '\0' )
703 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
710 /* Decide whether we should add a playlist item for this SDP */
712 /* Multi-media or no-parse -> pass to LIVE.COM */
713 if( p_sdp->i_media > 1 || p_sd->p_sys->b_parse == VLC_FALSE )
715 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
719 /* Parse connection information (c= & m= ) */
720 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
722 p_sdp->psz_uri = NULL;
726 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
728 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
731 /* FIXME: we create a new announce each time the sdp changes */
732 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
736 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
741 p_sd->p_sys->pp_announces[i]->i_last = mdate();
748 if( p_sdp->i_media > 1 )
750 msg_Dbg( p_sd, "passing to LIVE.COM" );
753 CreateAnnounce( p_sd, i_hash, p_sdp );
758 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
761 playlist_t *p_playlist;
762 playlist_item_t *p_item, *p_child;
764 sap_announce_t *p_sap = (sap_announce_t *)malloc(
765 sizeof(sap_announce_t ) );
768 msg_Err( p_sd, "out of memory");
769 p_sd->b_die = VLC_TRUE;
772 p_sap->i_last = mdate();
773 p_sap->i_hash = i_hash;
774 p_sap->p_sdp = p_sdp;
775 p_sap->p_item = NULL;
777 /* Create the playlist item here */
778 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri,
779 p_sap->p_sdp->psz_sessionname );
786 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
788 if( psz_value == NULL )
790 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
793 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
797 msg_Err( p_sd, "playlist not found" );
803 if( psz_value != NULL )
805 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node, psz_value );
807 if( p_child == NULL )
809 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
810 psz_value, p_sd->p_sys->p_node );
815 p_child = p_sd->p_sys->p_node;
818 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
820 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
821 PLAYLIST_APPEND, PLAYLIST_END );
823 vlc_object_release( p_playlist );
825 p_sap->p_item = p_item;
827 TAB_APPEND( p_sd->p_sys->i_announces,
828 p_sd->p_sys->pp_announces, p_sap );
833 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
837 for( i = 0 ; i< p_sdp->i_attributes; i++ )
839 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
840 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
842 return p_sdp->pp_attributes[i]->psz_value;
849 /* Fill p_sdp->psz_uri */
850 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
854 char *psz_uri = NULL;
855 char *psz_proto = NULL;
859 if( p_sdp->psz_connection )
861 psz_parse = p_sdp->psz_connection;
863 psz_eof = strchr( psz_parse, ' ' );
868 psz_parse = psz_eof + 1;
872 msg_Warn( p_obj, "unable to parse c field (1)");
876 psz_eof = strchr( psz_parse, ' ' );
881 if( !strncmp( psz_parse, "IP4", 3 ) )
885 else if( !strncmp( psz_parse, "IP6", 3 ) )
893 psz_parse = psz_eof + 1;
897 msg_Warn( p_obj, "unable to parse c field (2)");
901 psz_eof = strchr( psz_parse, '/' );
909 msg_Dbg( p_obj, "incorrect c field");
911 psz_uri = strdup( psz_parse );
916 if( p_sdp->psz_media )
918 psz_parse = p_sdp->psz_media;
920 psz_eof = strchr( psz_parse, ' ' );
926 if( strncmp( psz_parse, "audio", 5 ) &&
927 strncmp( psz_parse, "video",5 ) )
929 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
934 psz_parse = psz_eof + 1;
938 msg_Warn( p_obj, "unable to parse m field (1)");
943 psz_eof = strchr( psz_parse, ' ' );
949 /* FIXME : multiple port ! */
950 i_port = atoi( psz_parse );
952 if( i_port <= 0 || i_port >= 65536 )
954 msg_Warn( p_obj, "invalid transport port %i", i_port );
957 psz_parse = psz_eof + 1;
961 msg_Warn( p_obj, "unable to parse m field (2)");
966 psz_eof = strchr( psz_parse, ' ' );
974 msg_Dbg( p_obj, "incorrect m field");
976 psz_proto = strdup( psz_parse );
979 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
982 psz_proto = strdup( "rtp" );
984 if( psz_proto && !strncmp( psz_proto, "UDP", 3 ) )
987 psz_proto = strdup( "udp" );
991 /* FIXME: HTTP support */
998 if( ismult( psz_uri ) )
1000 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1004 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1011 /***********************************************************************
1012 * ParseSDP : SDP parsing
1013 * *********************************************************************
1014 * Validate SDP and parse all fields
1015 ***********************************************************************/
1016 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1019 vlc_bool_t b_invalid = VLC_FALSE;
1020 vlc_bool_t b_end = VLC_FALSE;
1022 if( psz_sdp == NULL )
1027 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1029 msg_Warn( p_obj, "bad SDP packet, begins with 0x%x(%c) 0x%x(%c)",
1030 psz_sdp[0],psz_sdp[0],psz_sdp[1],psz_sdp[1]);
1034 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1036 p_sdp->psz_sdp = strdup( psz_sdp );
1038 p_sdp->psz_sessionname = NULL;
1039 p_sdp->psz_media = NULL;
1040 p_sdp->psz_connection = NULL;
1041 p_sdp->psz_uri = NULL;
1042 p_sdp->psz_address = NULL;
1043 p_sdp->psz_address_type= NULL;
1046 p_sdp->i_attributes = 0;
1047 p_sdp->pp_attributes = NULL;
1049 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1056 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1057 *psz_sdp == ' ' || *psz_sdp == '\t' )
1062 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1064 psz_eol = psz_sdp + strlen( psz_sdp );
1067 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1072 if( psz_eol <= psz_sdp )
1078 /* no space allowed between fields */
1079 if( psz_sdp[1] != '=' )
1081 msg_Warn( p_obj, "invalid packet" ) ;
1086 /* Now parse each line */
1087 switch( psz_sdp[0] )
1092 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1097 /* o field is <username> <session id> <version>
1098 * <network type> <address type> <address> */
1100 #define GET_FIELD( store ) \
1101 psz_eof = strchr( psz_parse, ' ' ); \
1104 *psz_eof=0; store = strdup( psz_parse ); \
1108 if( i_field != 5 ) \
1110 b_invalid = VLC_TRUE; break; \
1114 store = strdup( psz_parse ); \
1117 psz_parse = psz_eof + 1; i_field++;
1120 psz_parse = &psz_sdp[2];
1121 GET_FIELD( p_sdp->psz_username );
1122 GET_FIELD( psz_sess_id );
1124 p_sdp->i_session_id = atoll( psz_sess_id );
1126 FREE( psz_sess_id );
1128 GET_FIELD( psz_sess_id );
1129 FREE( psz_sess_id );
1131 GET_FIELD( p_sdp->psz_network_type );
1132 GET_FIELD( p_sdp->psz_address_type );
1133 GET_FIELD( p_sdp->psz_address );
1144 case( 'a' ): /* attribute */
1146 char *psz_eon = strchr( &psz_sdp[2], ':' );
1147 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1149 /* Attribute with value */
1154 p_attr->psz_field = strdup( &psz_sdp[2] );
1155 p_attr->psz_value = strdup( psz_eon );
1157 else /* Attribute without value */
1159 p_attr->psz_field = strdup( &psz_sdp[2] );
1160 p_attr->psz_value = NULL;
1163 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1167 case( 'm' ): /* Media announcement */
1169 /* If we have several medias, we pass the announcement to
1170 * LIVE.COM, so just count them */
1172 if( p_sdp->i_media == 1 )
1174 p_sdp->psz_media = strdup( &psz_sdp[2] );
1181 if( p_sdp->i_media > 1 )
1184 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1205 /***********************************************************************
1206 * ismult: returns true if we have a multicast address
1207 ***********************************************************************/
1208 static int ismult( char *psz_uri )
1213 i_value = strtol( psz_uri, &psz_end, 0 );
1216 if( psz_uri[0] == '[')
1218 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1219 strncasecmp( &psz_uri[2], "FF0" , 3))
1222 return( VLC_FALSE );
1225 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1227 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1230 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1233 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1237 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1238 p_sd->p_sys->i_fd, i_fd );
1242 return VLC_EGENERIC;
1246 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1248 int i_result, i_dstsize, n;
1249 unsigned char *psz_dst;
1252 d_stream.zalloc = (alloc_func)0;
1253 d_stream.zfree = (free_func)0;
1254 d_stream.opaque = (voidpf)0;
1256 i_result = inflateInit(&d_stream);
1257 if( i_result != Z_OK )
1259 printf( "inflateInit() failed. Result: %d\n", i_result );
1263 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1264 i_position = p_playlist->i_index;
1266 /* Gather the complete sdp file */
1269 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1271 d_stream.next_in = (Bytef *)psz_src;
1272 d_stream.avail_in = i_len;
1280 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1281 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1282 d_stream.avail_out = 1000;
1284 i_result = inflate(&d_stream, Z_NO_FLUSH);
1285 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1287 printf( "Zlib decompression failed. Result: %d\n", i_result );
1291 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1292 ( i_result != Z_STREAM_END ) );
1294 i_dstsize = d_stream.total_out;
1295 inflateEnd( &d_stream );
1297 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1304 static void FreeSDP( sdp_t *p_sdp )
1307 FREE( p_sdp->psz_sdp );
1308 FREE( p_sdp->psz_sessionname );
1309 FREE( p_sdp->psz_connection );
1310 FREE( p_sdp->psz_media );
1311 FREE( p_sdp->psz_uri );
1313 FREE( p_sdp->psz_address );
1314 FREE( p_sdp->psz_address_type );
1316 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1318 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1319 FREE( p_sdp->pp_attributes[i]->psz_field );
1320 FREE( p_sdp->pp_attributes[i]->psz_value );
1321 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1327 static int RemoveAnnounce( services_discovery_t *p_sd,
1328 sap_announce_t *p_announce )
1331 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1332 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1334 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1336 if( !p_playlist ) return VLC_EGENERIC;
1338 if( p_announce->p_item )
1340 playlist_Delete( p_playlist, p_announce->p_item->input.i_id );
1343 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1345 if( p_sd->p_sys->pp_announces[i] == p_announce )
1347 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1353 vlc_object_release( p_playlist );
1360 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1362 /* A session is identified by
1363 * username, session_id, network type, address type and address */
1364 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1365 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1366 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1367 p_sdp1->psz_address && p_sdp2->psz_address )
1369 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1370 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1371 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1372 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1373 p_sdp1->i_session_id == p_sdp2->i_session_id )
1389 static void CacheLoad( services_discovery_t *p_sd )
1391 msg_Warn( p_sd, "Cache not implemented") ;
1394 static void CacheSave( services_discovery_t *p_sd )
1396 msg_Warn( p_sd, "Cache not implemented") ;