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>
37 #include <errno.h> /* ENOMEM */
42 #ifdef HAVE_SYS_TIME_H
43 # include <sys/time.h>
50 /************************************************************************
51 * Macros and definitions
52 ************************************************************************/
54 #define MAX_LINE_LENGTH 256
56 /* SAP is always on that port */
58 #define SAP_V4_ADDRESS "224.2.127.254"
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_( "Listen for SAP announces on another 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 "on the standard address" )
74 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
75 #define SAP_IPV6_LONGTEXT N_( \
76 "Set this if you want the SAP module to listen to IPv6 announces " \
77 "on the standard address" )
78 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
79 #define SAP_SCOPE_LONGTEXT N_( \
80 "Sets the scope for IPv6 announces (default is 8)" )
81 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
82 #define SAP_TIMEOUT_LONGTEXT N_( \
83 "Sets the time before SAP items get deleted if no new announce " \
85 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
86 #define SAP_PARSE_LONGTEXT N_( \
87 "When SAP can it will try to parse the SAP. If you don't select " \
88 "this, all announces will be parsed by the livedotcom module" )
89 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
90 #define SAP_STRICT_LONGTEXT N_( \
91 "When this is set, the SAP parser will discard some non-compliant " \
93 #define SAP_CACHE_TEXT N_("Use SAP cache")
94 #define SAP_CACHE_LONGTEXT N_( \
95 "If this option is selected, a SAP caching mechanism will be used." \
96 "This will result in lower SAP startup time, but you could end up " \
97 "with items corresponding to legacy streams." )
100 static int Open ( vlc_object_t * );
101 static void Close( vlc_object_t * );
102 static int OpenDemux ( vlc_object_t * );
103 static void CloseDemux ( vlc_object_t * );
106 set_shortname( _("SAP"));
107 set_description( _("SAP announces") );
108 set_category( CAT_PLAYLIST );
109 set_subcategory( SUBCAT_PLAYLIST_SD );
111 add_string( "sap-addr", NULL, NULL,
112 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
113 add_bool( "sap-ipv4", 1 , NULL,
114 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
115 add_bool( "sap-ipv6", 0 , NULL,
116 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
117 add_string( "sap-ipv6-scope", "8" , NULL,
118 SAP_SCOPE_TEXT, SAP_SCOPE_LONGTEXT, VLC_TRUE);
119 add_integer( "sap-timeout", 1800, NULL,
120 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
121 add_bool( "sap-parse", 1 , NULL,
122 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
123 add_bool( "sap-strict", 0 , NULL,
124 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
125 add_bool( "sap-cache", 0 , NULL,
126 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
128 set_capability( "services_discovery", 0 );
129 set_callbacks( Open, Close );
132 set_description( _("SDP file parser for UDP") );
133 add_shortcut( "sdp" );
134 set_capability( "demux2", 51 );
135 set_callbacks( OpenDemux, CloseDemux );
139 /*****************************************************************************
141 *****************************************************************************/
143 typedef struct sdp_t sdp_t;
144 typedef struct attribute_t attribute_t;
145 typedef struct sap_announce_t sap_announce_t;
147 /* The structure that contains sdp information */
153 char *psz_sessionname;
155 /* Raw m= and c= fields */
156 char *psz_connection;
161 char *psz_network_type;
162 char *psz_address_type;
164 int64_t i_session_id;
169 int i_in; /* IP version */
175 attribute_t **pp_attributes;
184 struct sap_announce_t
189 uint32_t i_source[4];
191 /* SAP annnounces must only contain one SDP */
194 playlist_item_t *p_item;
197 struct services_discovery_sys_t
199 /* Socket descriptors */
204 playlist_item_t *p_node;
206 /* charset conversion */
207 vlc_iconv_t iconvHandle;
209 /* Table of announces */
211 struct sap_announce_t **pp_announces;
225 /*****************************************************************************
227 *****************************************************************************/
231 static int Demux( demux_t *p_demux );
232 static int Control( demux_t *, int, va_list );
233 static void Run ( services_discovery_t *p_sd );
235 /* Main parsing functions */
236 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
237 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
238 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
239 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
240 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
243 static void CacheLoad( services_discovery_t *p_sd );
244 static void CacheSave( services_discovery_t *p_sd );
245 /* Helper functions */
246 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
247 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
248 static char *convert_from_utf8( struct services_discovery_t *p_sd,
250 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
252 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
253 static void FreeSDP( sdp_t *p_sdp );
256 /* Detect multicast addresses */
257 static int ismult( char * );
260 if( p ) { free( p ); (p) = NULL; }
261 /*****************************************************************************
262 * Open: initialize and create stuff
263 *****************************************************************************/
264 static int Open( vlc_object_t *p_this )
266 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
267 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
268 malloc( sizeof( services_discovery_sys_t ) );
270 playlist_t *p_playlist;
271 playlist_view_t *p_view;
272 char *psz_addr, *psz_charset;
275 p_sys->i_timeout = config_GetInt( p_sd,"sap-timeout" );
277 vlc_current_charset( &psz_charset );
278 p_sys->iconvHandle = vlc_iconv_open( psz_charset, "UTF-8" );
280 if( p_sys->iconvHandle == (vlc_iconv_t)(-1) )
282 msg_Warn( p_sd, "Unable to do requested conversion" );
291 p_sys->b_strict = config_GetInt( p_sd, "sap-strict");
292 p_sys->b_parse = config_GetInt( p_sd, "sap-parse" );
294 if( config_GetInt( p_sd, "sap-cache" ) )
299 if( config_GetInt( p_sd, "sap-ipv4" ) )
301 InitSocket( p_sd, SAP_V4_ADDRESS, SAP_PORT );
303 if( config_GetInt( p_sd, "sap-ipv6" ) )
305 /* [ + 8x4+7*':' + ] */
306 char psz_address[42];
308 char *psz_scope = config_GetPsz( p_sd, "sap-ipv6-scope" );
310 if( psz_scope == NULL || *psz_scope == '\0')
316 c_scope = psz_scope[0];
318 snprintf( psz_address, 42, "[%s%c%s]", IPV6_ADDR_1, c_scope,
320 InitSocket( p_sd, psz_address, SAP_PORT );
323 psz_addr = config_GetPsz( p_sd, "sap-addr" );
324 if( psz_addr && *psz_addr )
326 InitSocket( p_sd, psz_addr, SAP_PORT );
329 if( p_sys->i_fd == 0 )
331 msg_Err( p_sd, "unable to read on any address");
335 /* Create our playlist node */
336 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
340 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
344 p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
345 p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
346 _("SAP"), p_view->p_root );
347 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
348 val.b_bool = VLC_TRUE;
349 var_Set( p_playlist, "intf-change", val );
351 vlc_object_release( p_playlist );
353 p_sys->i_announces = 0;
354 p_sys->pp_announces = NULL;
359 /*****************************************************************************
360 * OpenDemux: initialize and create stuff
361 *****************************************************************************/
362 static int OpenDemux( vlc_object_t *p_this )
364 demux_t *p_demux = (demux_t *)p_this;
366 int i_max_sdp = 1024;
368 char *psz_sdp = (char *)malloc( i_max_sdp );
379 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 )
381 msg_Err( p_demux, "cannot peek" );
384 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
385 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
386 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
388 msg_Warn( p_demux, "SDP (UDP) module discarded" );
393 /* Gather the complete sdp file */
396 int i_read = stream_Read( p_demux->s,
397 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
401 msg_Err( p_demux, "failed to read SDP" );
407 if( i_read < i_max_sdp - i_sdp - 1 )
409 psz_sdp[i_sdp] = '\0';
414 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
417 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
421 msg_Warn( p_demux, "invalid SDP");
425 if( p_sdp->i_media > 1 )
430 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
432 p_sdp->psz_uri = NULL;
434 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 && p_sdp->i_media_type != 14 )
437 if( p_sdp->psz_uri == NULL ) goto error;
439 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
440 p_demux->p_sys->p_sdp = p_sdp;
441 p_demux->pf_control = Control;
442 p_demux->pf_demux = Demux;
449 if( p_sdp ) FreeSDP( p_sdp );
450 stream_Seek( p_demux->s, 0 );
454 /*****************************************************************************
456 *****************************************************************************/
457 static void Close( vlc_object_t *p_this )
459 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
460 services_discovery_sys_t *p_sys = p_sd->p_sys;
462 playlist_t *p_playlist;
465 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
467 net_Close( p_sys->pi_fd[i] );
470 if( config_GetInt( p_sd, "sap-cache" ) )
475 for( i = p_sys->i_announces - 1; i>= 0; i-- )
477 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
480 p_playlist = (playlist_t *) vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
485 playlist_NodeDelete( p_playlist, p_sys->p_node, VLC_TRUE , VLC_TRUE );
486 vlc_object_release( p_playlist );
489 if( p_sys->iconvHandle != (vlc_iconv_t)(-1) )
490 vlc_iconv_close( p_sys->iconvHandle );
495 /*****************************************************************************
496 * CloseDemux: Close the demuxer
497 *****************************************************************************/
498 static void CloseDemux( vlc_object_t *p_this )
503 /*****************************************************************************
504 * Run: main SAP thread
505 *****************************************************************************
506 * Listens to SAP packets, and sends them to packet_handle
507 *****************************************************************************/
508 #define MAX_SAP_BUFFER 5000
510 static void Run( services_discovery_t *p_sd )
513 /* Dirty hack to slow down the startup of the sap interface */
514 /* Unneeded now : our node is in no_select mode */
517 /* read SAP packets */
518 while( !p_sd->b_die )
521 p_buffer = (uint8_t *)malloc( MAX_SAP_BUFFER );
525 msg_Err( p_sd, "out of memory");
526 p_sd->b_die = VLC_TRUE;
530 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
531 p_sd->p_sys->i_fd, p_buffer,
532 MAX_SAP_BUFFER, 500000 );
534 /* Check for items that need deletion */
535 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
537 struct sap_announce_t *p_announce;
538 mtime_t i_timeout = ( mtime_t ) 1000000*p_sys->i_timeout;
539 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
541 msg_Dbg( p_sd,"Time out for %s, deleting (%i/%i)",
542 p_sd->p_sys->pp_announces[i]->psz_name,
543 i , p_sd->p_sys->i_announces );
545 /* Remove the playlist item */
546 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
550 int i_pos = playlist_GetPositionById( p_playlist,
551 p_sd->p_sys->pp_announces[i]->i_id );
552 playlist_Delete( p_playlist, i_pos );
553 vlc_object_release( p_playlist );
556 /* Free the p_announce */
557 p_announce = p_sd->p_sys->pp_announces[i];
558 if( p_announce->psz_name )
559 free( p_announce->psz_name );
560 if( p_announce->psz_uri )
561 free( p_announce->psz_uri );
563 /* Remove the sap_announce from the array */
564 REMOVE_ELEM( p_sd->p_sys->pp_announces,
565 p_sd->p_sys->i_announces, i );
573 /* Minimum length is > 6 */
578 msg_Warn( p_sd, "socket read error" );
584 p_buffer[i_read] = '\0';
586 /* Parse the packet */
587 ParseSAP( p_sd, p_buffer, i_read );
593 /**********************************************************************
594 * Demux: reads and demuxes data packets
595 * Return -1 if error, 0 if EOF, 1 else
596 **********************************************************************/
597 static int Demux( demux_t *p_demux )
599 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
600 playlist_t *p_playlist;
602 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
605 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
607 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
608 PLAYLIST_APPEND, PLAYLIST_END );
610 vlc_object_release( p_playlist );
611 if( p_sdp ) FreeSDP( p_sdp );
616 static int Control( demux_t *p_demux, int i_query, va_list args )
621 /**************************************************************
623 **************************************************************/
625 /* i_read is at least > 6 */
626 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
628 int i_version, i_address_type, i_hash, i;
630 uint8_t *psz_initial_sdp;
632 vlc_bool_t b_compressed;
633 vlc_bool_t b_need_delete = VLC_FALSE;
635 int i_decompressed_size;
636 uint8_t *p_decompressed_buffer;
640 /* First, check the sap announce is correct */
641 i_version = p_buffer[0] >> 5;
644 msg_Dbg( p_sd, "strange sap version %d found", i_version );
647 i_address_type = p_buffer[0] & 0x10;
649 if( (p_buffer[0] & 0x08) != 0 )
651 msg_Dbg( p_sd, "reserved bit incorrectly set" );
655 if( (p_buffer[0] & 0x04) != 0 )
657 msg_Dbg( p_sd, "session deletion packet" );
658 b_need_delete = VLC_TRUE;
661 if( p_buffer[0] & 0x02 )
663 msg_Dbg( p_sd, "encrypted packet, unsupported" );
667 b_compressed = p_buffer[0] & 0x01;
669 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
671 if( p_sd->p_sys->b_strict && i_hash == 0 )
673 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
677 psz_sdp = &p_buffer[4];
678 psz_initial_sdp = psz_sdp;
680 if( i_address_type == 0 ) /* ipv4 source address */
685 msg_Warn( p_sd,"too short SAP packet\n" );
689 else /* ipv6 source address */
694 msg_Warn( p_sd,"too short SAP packet\n" );
702 i_decompressed_size = Decompress( psz_sdp,
703 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
704 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
706 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
707 psz_sdp[i_decompressed_size] = '\0';
708 free( p_decompressed_buffer );
711 msg_Warn( p_sd, "Ignoring compressed sap packet" );
716 /* Add the size of authentification info */
717 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
719 msg_Warn( p_sd, "too short SAP packet\n");
722 psz_sdp += p_buffer[1];
725 /* Skip payload type */
726 /* Handle announces without \0 between SAP and SDP */
727 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
729 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
731 msg_Warn( p_sd, "empty SDP ?");
736 if( *psz_sdp == '\0' )
740 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
742 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
744 if( psz_sdp -p_buffer >= i_read )
746 msg_Warn( p_sd, "package without content" );
751 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
758 /* Decide whether we should add a playlist item for this SDP */
759 /* Parse connection information (c= & m= ) */
760 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
762 p_sdp->psz_uri = NULL;
765 /* Multi-media or no-parse -> pass to LIVE.COM */
766 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
767 p_sdp->i_media_type != 32 &&
768 p_sdp->i_media_type != 33) ||
769 p_sd->p_sys->b_parse == VLC_FALSE )
771 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
772 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
775 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
777 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
780 /* FIXME: we create a new announce each time the sdp changes */
781 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
785 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
790 p_sd->p_sys->pp_announces[i]->i_last = mdate();
797 if( p_sdp->i_media > 1 )
799 msg_Dbg( p_sd, "passing to LIVE.COM" );
802 CreateAnnounce( p_sd, i_hash, p_sdp );
807 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
810 playlist_t *p_playlist;
811 playlist_item_t *p_item, *p_child;
813 sap_announce_t *p_sap = (sap_announce_t *)malloc(
814 sizeof(sap_announce_t ) );
816 psz_value = convert_from_utf8( p_sd, p_sdp->psz_sessionname );
817 if( p_sap == NULL || psz_value == NULL )
819 msg_Err( p_sd, "out of memory");
822 p_sd->b_die = VLC_TRUE;
825 p_sap->i_last = mdate();
826 p_sap->i_hash = i_hash;
827 p_sap->p_sdp = p_sdp;
828 p_sap->p_item = NULL;
830 /* Create the playlist item here */
831 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, psz_value );
839 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
840 if( psz_value != NULL )
842 vlc_input_item_AddInfo( &p_item->input, _("Session"),
843 _("Tool"), psz_value );
845 if( strcmp( p_sdp->psz_username, "-" ) )
847 vlc_input_item_AddInfo( &p_item->input, _("Session"),
848 _("User"), p_sdp->psz_username );
851 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
853 if( psz_value == NULL )
855 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
858 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
862 msg_Err( p_sd, "playlist not found" );
868 if( psz_value != NULL )
870 char *psz_grp = convert_from_utf8( p_sd, psz_value );
872 if( psz_grp != NULL )
874 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node,
877 if( p_child == NULL )
878 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
879 psz_grp, p_sd->p_sys->p_node );
884 vlc_object_release( p_playlist );
885 msg_Err( p_sd, "out of memory");
892 p_child = p_sd->p_sys->p_node;
895 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
896 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
898 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
899 PLAYLIST_APPEND, PLAYLIST_END );
901 vlc_object_release( p_playlist );
903 p_sap->p_item = p_item;
905 TAB_APPEND( p_sd->p_sys->i_announces,
906 p_sd->p_sys->pp_announces, p_sap );
911 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
915 for( i = 0 ; i< p_sdp->i_attributes; i++ )
917 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
918 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
920 return p_sdp->pp_attributes[i]->psz_value;
927 /* Fill p_sdp->psz_uri */
928 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
932 char *psz_uri = NULL;
933 char *psz_proto = NULL;
937 if( p_sdp->psz_connection )
939 psz_parse = p_sdp->psz_connection;
941 psz_eof = strchr( psz_parse, ' ' );
946 psz_parse = psz_eof + 1;
950 msg_Warn( p_obj, "unable to parse c field (1)");
954 psz_eof = strchr( psz_parse, ' ' );
959 if( !strncmp( psz_parse, "IP4", 3 ) )
963 else if( !strncmp( psz_parse, "IP6", 3 ) )
971 psz_parse = psz_eof + 1;
975 msg_Warn( p_obj, "unable to parse c field (2)");
979 psz_eof = strchr( psz_parse, '/' );
987 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
989 psz_uri = strdup( psz_parse );
994 if( p_sdp->psz_media )
996 psz_parse = p_sdp->psz_media;
998 psz_eof = strchr( psz_parse, ' ' );
1004 if( strncmp( psz_parse, "audio", 5 ) &&
1005 strncmp( psz_parse, "video",5 ) )
1007 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
1009 return VLC_EGENERIC;
1012 psz_parse = psz_eof + 1;
1016 msg_Warn( p_obj, "unable to parse m field (1)");
1018 return VLC_EGENERIC;
1021 psz_eof = strchr( psz_parse, ' ' );
1027 /* FIXME : multiple port ! */
1028 i_port = atoi( psz_parse );
1030 if( i_port <= 0 || i_port >= 65536 )
1032 msg_Warn( p_obj, "invalid transport port %i", i_port );
1035 psz_parse = psz_eof + 1;
1039 msg_Warn( p_obj, "unable to parse m field (2)");
1041 return VLC_EGENERIC;
1044 psz_eof = strchr( psz_parse, ' ' );
1049 psz_proto = strdup( psz_parse );
1051 psz_parse = psz_eof + 1;
1052 p_sdp->i_media_type = atoi( psz_parse );
1057 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1058 p_sdp->i_media_type = 33;
1059 psz_proto = strdup( psz_parse );
1063 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1066 psz_proto = strdup( "rtp" );
1068 if( psz_proto && !strncmp( psz_proto, "UDP", 3 ) )
1071 psz_proto = strdup( "udp" );
1074 /* FIXME: HTTP support */
1081 if( ismult( psz_uri ) )
1083 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1087 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1094 /***********************************************************************
1095 * ParseSDP : SDP parsing
1096 * *********************************************************************
1097 * Validate SDP and parse all fields
1098 ***********************************************************************/
1099 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1102 vlc_bool_t b_invalid = VLC_FALSE;
1103 vlc_bool_t b_end = VLC_FALSE;
1104 if( psz_sdp == NULL )
1109 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1111 msg_Warn( p_obj, "Bad packet" );
1115 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1117 p_sdp->psz_sdp = strdup( psz_sdp );
1119 p_sdp->psz_sessionname = NULL;
1120 p_sdp->psz_media = NULL;
1121 p_sdp->psz_connection = NULL;
1122 p_sdp->psz_uri = NULL;
1123 p_sdp->psz_address = NULL;
1124 p_sdp->psz_address_type= NULL;
1127 p_sdp->i_attributes = 0;
1128 p_sdp->pp_attributes = NULL;
1130 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1137 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1138 *psz_sdp == ' ' || *psz_sdp == '\t' )
1143 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1145 psz_eol = psz_sdp + strlen( psz_sdp );
1148 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1153 if( psz_eol <= psz_sdp )
1159 /* no space allowed between fields */
1160 if( psz_sdp[1] != '=' )
1162 msg_Warn( p_obj, "invalid packet" ) ;
1167 /* Now parse each line */
1168 switch( psz_sdp[0] )
1173 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1178 /* o field is <username> <session id> <version>
1179 * <network type> <address type> <address> */
1181 #define GET_FIELD( store ) \
1182 psz_eof = strchr( psz_parse, ' ' ); \
1185 *psz_eof=0; store = strdup( psz_parse ); \
1189 if( i_field != 5 ) \
1191 b_invalid = VLC_TRUE; break; \
1195 store = strdup( psz_parse ); \
1198 psz_parse = psz_eof + 1; i_field++;
1201 psz_parse = &psz_sdp[2];
1202 GET_FIELD( p_sdp->psz_username );
1203 GET_FIELD( psz_sess_id );
1205 p_sdp->i_session_id = atoll( psz_sess_id );
1207 FREE( psz_sess_id );
1209 GET_FIELD( psz_sess_id );
1210 FREE( psz_sess_id );
1212 GET_FIELD( p_sdp->psz_network_type );
1213 GET_FIELD( p_sdp->psz_address_type );
1214 GET_FIELD( p_sdp->psz_address );
1225 case( 'a' ): /* attribute */
1227 char *psz_eon = strchr( &psz_sdp[2], ':' );
1228 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1230 /* Attribute with value */
1235 p_attr->psz_field = strdup( &psz_sdp[2] );
1236 p_attr->psz_value = strdup( psz_eon );
1238 else /* Attribute without value */
1240 p_attr->psz_field = strdup( &psz_sdp[2] );
1241 p_attr->psz_value = NULL;
1244 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1248 case( 'm' ): /* Media announcement */
1250 /* If we have several medias, we pass the announcement to
1251 * LIVE.COM, so just count them */
1253 if( p_sdp->i_media == 1 )
1255 p_sdp->psz_media = strdup( &psz_sdp[2] );
1262 if( p_sdp->i_media > 1 )
1265 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1286 static char *convert_from_utf8( struct services_discovery_t *p_sd,
1289 char *psz_local, *psz_in, *psz_out;
1290 size_t ret, i_in, i_out;
1292 if( psz_unicode == NULL )
1294 if ( p_sd->p_sys->iconvHandle == (vlc_iconv_t)(-1) )
1295 return strdup( psz_unicode );
1297 psz_in = psz_unicode;
1298 i_in = strlen( psz_unicode );
1301 psz_local = malloc( i_out + 1 );
1302 if( psz_local == NULL )
1303 return strdup( psz_unicode );
1304 psz_out = psz_local;
1306 ret = vlc_iconv( p_sd->p_sys->iconvHandle,
1307 &psz_in, &i_in, &psz_out, &i_out);
1308 if( ret == (size_t)(-1) || i_in )
1310 msg_Warn( p_sd, "Failed to convert \"%s\" from UTF-8", psz_unicode );
1311 return strdup( psz_unicode );
1318 /***********************************************************************
1319 * ismult: returns true if we have a multicast address
1320 ***********************************************************************/
1321 static int ismult( char *psz_uri )
1326 i_value = strtol( psz_uri, &psz_end, 0 );
1329 if( psz_uri[0] == '[')
1331 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1332 strncasecmp( &psz_uri[2], "FF0" , 3))
1335 return( VLC_FALSE );
1338 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1340 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1343 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1346 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1350 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1351 p_sd->p_sys->i_fd, i_fd );
1355 return VLC_EGENERIC;
1359 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1361 int i_result, i_dstsize, n;
1362 unsigned char *psz_dst;
1365 d_stream.zalloc = (alloc_func)0;
1366 d_stream.zfree = (free_func)0;
1367 d_stream.opaque = (voidpf)0;
1369 i_result = inflateInit(&d_stream);
1370 if( i_result != Z_OK )
1372 printf( "inflateInit() failed. Result: %d\n", i_result );
1376 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1377 i_position = p_playlist->i_index;
1379 /* Gather the complete sdp file */
1382 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1384 d_stream.next_in = (Bytef *)psz_src;
1385 d_stream.avail_in = i_len;
1393 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1394 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1395 d_stream.avail_out = 1000;
1397 i_result = inflate(&d_stream, Z_NO_FLUSH);
1398 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1400 printf( "Zlib decompression failed. Result: %d\n", i_result );
1404 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1405 ( i_result != Z_STREAM_END ) );
1407 i_dstsize = d_stream.total_out;
1408 inflateEnd( &d_stream );
1410 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1417 static void FreeSDP( sdp_t *p_sdp )
1420 FREE( p_sdp->psz_sdp );
1421 FREE( p_sdp->psz_sessionname );
1422 FREE( p_sdp->psz_connection );
1423 FREE( p_sdp->psz_media );
1424 FREE( p_sdp->psz_uri );
1426 FREE( p_sdp->psz_address );
1427 FREE( p_sdp->psz_address_type );
1429 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1431 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1432 FREE( p_sdp->pp_attributes[i]->psz_field );
1433 FREE( p_sdp->pp_attributes[i]->psz_value );
1434 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1440 static int RemoveAnnounce( services_discovery_t *p_sd,
1441 sap_announce_t *p_announce )
1444 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1445 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1447 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1449 if( !p_playlist ) return VLC_EGENERIC;
1451 if( p_announce->p_item )
1453 playlist_LockDelete( p_playlist, p_announce->p_item->input.i_id );
1456 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1458 if( p_sd->p_sys->pp_announces[i] == p_announce )
1460 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1466 vlc_object_release( p_playlist );
1473 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1475 /* A session is identified by
1476 * username, session_id, network type, address type and address */
1477 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1478 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1479 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1480 p_sdp1->psz_address && p_sdp2->psz_address )
1482 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1483 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1484 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1485 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1486 p_sdp1->i_session_id == p_sdp2->i_session_id )
1502 static void CacheLoad( services_discovery_t *p_sd )
1504 msg_Warn( p_sd, "Cache not implemented") ;
1507 static void CacheSave( services_discovery_t *p_sd )
1509 msg_Warn( p_sd, "Cache not implemented") ;