1 /*****************************************************************************
2 * sap.c : SAP interface module
3 *****************************************************************************
4 * Copyright (C) 2004-2005 the VideoLAN team
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc/input.h>
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 /* Global-scope SAP address */
59 #define SAP_V4_GLOBAL_ADDRESS "224.2.127.254"
60 /* Organization-local SAP address */
61 #define SAP_V4_ORG_ADDRESS "239.195.255.255"
62 /* Local (smallest non-link-local scope) SAP address */
63 #define SAP_V4_LOCAL_ADDRESS "239.255.255.255"
64 /* Link-local SAP address */
65 #define SAP_V4_LINK_ADDRESS "224.0.0.255"
68 #define SAP_V6_1 "FF0"
69 /* Scope is inserted between them */
70 #define SAP_V6_2 "::2:7FFE"
71 /* See RFC3513 for list of valid scopes */
72 /* FIXME: find a way to listen to link-local scope */
73 static const char ipv6_scopes[] = "1456789ABCDE";
76 /*****************************************************************************
78 *****************************************************************************/
79 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
80 #define SAP_ADDR_LONGTEXT N_( "The SAP module normally chooses itself the " \
81 "right addresses to listen to. However, you " \
82 "can specify a specific address." )
83 #define SAP_IPV4_TEXT N_( "IPv4 SAP" )
84 #define SAP_IPV4_LONGTEXT N_( \
85 "Listen to IPv4 announcements " \
86 "on the standard address." )
87 #define SAP_IPV6_TEXT N_( "IPv6 SAP" )
88 #define SAP_IPV6_LONGTEXT N_( \
89 "Listen to IPv6 announcements " \
90 "on the standard addresses." )
91 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
92 #define SAP_SCOPE_LONGTEXT N_( \
93 "Scope for IPv6 announcements (default is 8)." )
94 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
95 #define SAP_TIMEOUT_LONGTEXT N_( \
96 "Delay after which SAP items get deleted if no new announcement " \
98 #define SAP_PARSE_TEXT N_( "Try to parse the announce" )
99 #define SAP_PARSE_LONGTEXT N_( \
100 "This enables actual parsing of the announces by the SAP module. " \
101 "Otherwise, all announcements are parsed by the \"livedotcom\" " \
102 "(RTP/RTSP) module." )
103 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
104 #define SAP_STRICT_LONGTEXT N_( \
105 "When this is set, the SAP parser will discard some non-compliant " \
107 #define SAP_CACHE_TEXT N_("Use SAP cache")
108 #define SAP_CACHE_LONGTEXT N_( \
109 "This enables a SAP caching mechanism. " \
110 "This will result in lower SAP startup time, but you could end up " \
111 "with items corresponding to legacy streams." )
112 #define SAP_TIMESHIFT_TEXT N_("Allow timeshifting")
113 #define SAP_TIMESHIFT_LONGTEXT N_( "This automatically enables timeshifting " \
114 "for streams discovered through SAP announcements." )
117 static int Open ( vlc_object_t * );
118 static void Close( vlc_object_t * );
119 static int OpenDemux ( vlc_object_t * );
120 static void CloseDemux ( vlc_object_t * );
123 set_shortname( _("SAP"));
124 set_description( _("SAP Announcements") );
125 set_category( CAT_PLAYLIST );
126 set_subcategory( SUBCAT_PLAYLIST_SD );
128 add_string( "sap-addr", NULL, NULL,
129 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
130 add_bool( "sap-ipv4", 1 , NULL,
131 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
132 add_bool( "sap-ipv6", 1 , NULL,
133 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
134 add_integer( "sap-timeout", 1800, NULL,
135 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
136 add_bool( "sap-parse", 1 , NULL,
137 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
138 add_bool( "sap-strict", 0 , NULL,
139 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
141 add_bool( "sap-cache", 0 , NULL,
142 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
144 add_bool( "sap-timeshift", 0 , NULL,
145 SAP_TIMESHIFT_TEXT,SAP_TIMESHIFT_LONGTEXT, VLC_TRUE );
147 set_capability( "services_discovery", 0 );
148 set_callbacks( Open, Close );
151 set_description( _("SDP file parser for UDP") );
152 add_shortcut( "sdp" );
153 set_capability( "demux2", 51 );
154 set_callbacks( OpenDemux, CloseDemux );
158 /*****************************************************************************
160 *****************************************************************************/
162 typedef struct sdp_t sdp_t;
163 typedef struct attribute_t attribute_t;
164 typedef struct sap_announce_t sap_announce_t;
166 /* The structure that contains sdp information */
172 char *psz_sessionname;
174 /* Raw m= and c= fields */
175 char *psz_connection;
180 char *psz_network_type;
181 char *psz_address_type;
183 int64_t i_session_id;
188 int i_in; /* IP version */
194 attribute_t **pp_attributes;
203 struct sap_announce_t
208 uint32_t i_source[4];
210 /* SAP annnounces must only contain one SDP */
218 struct services_discovery_sys_t
220 /* Socket descriptors */
225 playlist_item_t *p_node_cat;
226 playlist_item_t *p_node_one;
228 /* Table of announces */
230 struct sap_announce_t **pp_announces;
235 vlc_bool_t b_timeshift;
245 /*****************************************************************************
247 *****************************************************************************/
251 static int Demux( demux_t *p_demux );
252 static int Control( demux_t *, int, va_list );
253 static void Run ( services_discovery_t *p_sd );
255 /* Main parsing functions */
256 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
257 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
258 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
259 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
260 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
263 static void CacheLoad( services_discovery_t *p_sd );
264 static void CacheSave( services_discovery_t *p_sd );
265 /* Helper functions */
266 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
267 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
268 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
270 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
272 static void FreeSDP( sdp_t *p_sdp );
274 /*****************************************************************************
275 * Open: initialize and create stuff
276 *****************************************************************************/
277 static int Open( vlc_object_t *p_this )
279 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
280 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
281 malloc( sizeof( services_discovery_sys_t ) );
283 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
291 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
292 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
295 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
301 /* Cache sap_timeshift value */
302 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
303 ? VLC_TRUE : VLC_FALSE;
305 /* Create our playlist node */
308 playlist_NodesPairCreate( pl_Get( p_sd ), _("SAP sessions"),
309 &p_sys->p_node_cat, &p_sys->p_node_one,
312 p_sys->i_announces = 0;
313 p_sys->pp_announces = NULL;
318 /*****************************************************************************
319 * OpenDemux: initialize and create stuff
320 *****************************************************************************/
321 static int OpenDemux( vlc_object_t *p_this )
323 demux_t *p_demux = (demux_t *)p_this;
325 int i_max_sdp = 1024;
327 char *psz_sdp = NULL;
330 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
332 /* We want livedotcom module to parse this SDP file */
339 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
341 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
342 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
343 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
349 psz_sdp = (char *)malloc( i_max_sdp );
350 if( !psz_sdp ) return VLC_EGENERIC;
352 /* Gather the complete sdp file */
355 int i_read = stream_Read( p_demux->s,
356 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
360 msg_Err( p_demux, "failed to read SDP" );
366 if( i_read < i_max_sdp - i_sdp - 1 )
368 psz_sdp[i_sdp] = '\0';
373 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
376 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
380 msg_Warn( p_demux, "invalid SDP");
384 if( p_sdp->i_media > 1 )
389 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
391 p_sdp->psz_uri = NULL;
393 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
394 p_sdp->i_media_type != 14 )
397 if( p_sdp->psz_uri == NULL ) goto error;
399 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
400 p_demux->p_sys->p_sdp = p_sdp;
401 p_demux->pf_control = Control;
402 p_demux->pf_demux = Demux;
409 if( p_sdp ) FreeSDP( p_sdp ); p_sdp = NULL;
410 stream_Seek( p_demux->s, 0 );
414 /*****************************************************************************
416 *****************************************************************************/
417 static void Close( vlc_object_t *p_this )
419 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
420 services_discovery_sys_t *p_sys = p_sd->p_sys;
424 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
426 net_Close( p_sys->pi_fd[i] );
428 FREENULL( p_sys->pi_fd );
431 if( config_GetInt( p_sd, "sap-cache" ) )
437 for( i = p_sys->i_announces - 1; i>= 0; i-- )
439 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
441 FREENULL( p_sys->pp_announces );
443 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_cat, VLC_TRUE,
445 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_one, VLC_TRUE,
451 /*****************************************************************************
452 * CloseDemux: Close the demuxer
453 *****************************************************************************/
454 static void CloseDemux( vlc_object_t *p_this )
456 demux_t *p_demux = (demux_t *)p_this;
459 if( p_demux->p_sys->p_sdp ) { FreeSDP( p_demux->p_sys->p_sdp ); p_demux->p_sys->p_sdp = NULL; }
460 free( p_demux->p_sys );
464 /*****************************************************************************
465 * Run: main SAP thread
466 *****************************************************************************
467 * Listens to SAP packets, and sends them to packet_handle
468 *****************************************************************************/
469 #define MAX_SAP_BUFFER 5000
471 static void Run( services_discovery_t *p_sd )
476 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
477 * DNS queries, even if the DNS server returns an error with milliseconds.
478 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
479 * Winsock 1.1 from Windows 95, if not Windows 3.1.
480 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
481 * we have to open sockets in Run() rather than Open(). */
482 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
484 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
485 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
486 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
487 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
489 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
491 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
494 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
496 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
497 InitSocket( p_sd, psz_address, SAP_PORT );
501 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
502 if( psz_addr && *psz_addr )
504 InitSocket( p_sd, psz_addr, SAP_PORT );
508 if( p_sd->p_sys->i_fd == 0 )
510 msg_Err( p_sd, "unable to listen on any address" );
514 /* read SAP packets */
515 while( !p_sd->b_die )
518 uint8_t p_buffer[MAX_SAP_BUFFER+1];
520 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
521 p_sd->p_sys->i_fd, p_buffer,
522 MAX_SAP_BUFFER, 500000 );
524 /* Check for items that need deletion */
525 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
527 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
529 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
531 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i] );
535 /* Minimum length is > 6 */
540 msg_Warn( p_sd, "socket read error" );
545 p_buffer[i_read] = '\0';
547 /* Parse the packet */
548 ParseSAP( p_sd, p_buffer, i_read );
552 /**********************************************************************
553 * Demux: reads and demuxes data packets
554 * Return -1 if error, 0 if EOF, 1 else
555 **********************************************************************/
556 static int Demux( demux_t *p_demux )
558 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
559 input_thread_t *p_input;
560 input_item_t *p_parent_input;
562 playlist_t *p_playlist = pl_Yield( p_demux );
563 p_input = (input_thread_t *)vlc_object_find( p_demux, VLC_OBJECT_INPUT,
568 msg_Err( p_demux, "parent input could not be found" );
572 p_parent_input = p_input->input.p_item;
574 vlc_mutex_lock( &p_parent_input->lock );
575 FREENULL( p_parent_input->psz_uri );
576 p_parent_input->psz_uri = strdup( p_sdp->psz_uri );
577 FREENULL( p_parent_input->psz_name );
578 p_parent_input->psz_name = strdup( EnsureUTF8( p_sdp->psz_sessionname ) );
579 p_parent_input->i_type = ITEM_TYPE_NET;
581 if( p_playlist->status.p_item &&
582 p_playlist->status.p_item->p_input == p_parent_input )
584 playlist_Control( p_playlist, PLAYLIST_VIEWPLAY,
585 p_playlist->status.p_node, p_playlist->status.p_item );
588 vlc_mutex_unlock( &p_parent_input->lock );
589 vlc_object_release( p_input );
590 vlc_object_release( p_playlist );
595 static int Control( demux_t *p_demux, int i_query, va_list args )
600 /**************************************************************
602 **************************************************************/
604 /* i_read is at least > 6 */
605 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
607 int i_version, i_address_type, i_hash, i;
608 char *psz_sdp, *psz_foo, *psz_initial_sdp;
609 uint8_t *p_decompressed_buffer = NULL;
611 vlc_bool_t b_compressed;
612 vlc_bool_t b_need_delete = VLC_FALSE;
614 /* First, check the sap announce is correct */
615 i_version = p_buffer[0] >> 5;
618 msg_Dbg( p_sd, "strange sap version %d found", i_version );
621 i_address_type = p_buffer[0] & 0x10;
623 if( (p_buffer[0] & 0x08) != 0 )
625 msg_Dbg( p_sd, "reserved bit incorrectly set" );
629 if( (p_buffer[0] & 0x04) != 0 )
631 msg_Dbg( p_sd, "session deletion packet" );
632 b_need_delete = VLC_TRUE;
635 if( p_buffer[0] & 0x02 )
637 msg_Dbg( p_sd, "encrypted packet, unsupported" );
641 b_compressed = p_buffer[0] & 0x01;
643 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
645 if( p_sd->p_sys->b_strict && i_hash == 0 )
647 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
651 psz_sdp = (char *)p_buffer + 4;
652 psz_initial_sdp = psz_sdp;
654 if( i_address_type == 0 ) /* ipv4 source address */
659 msg_Warn( p_sd, "too short SAP packet" );
663 else /* ipv6 source address */
668 msg_Warn( p_sd, "too short SAP packet" );
676 int i_decompressed_size;
678 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
679 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
680 if( i_decompressed_size > 0 )
682 psz_sdp = (char *)p_decompressed_buffer;
683 realloc( p_decompressed_buffer, i_decompressed_size++ );
684 psz_sdp[i_decompressed_size] = '\0';
688 msg_Warn( p_sd, "decompression of sap packet failed" );
692 msg_Warn( p_sd, "ignoring compressed sap packet" );
697 /* Add the size of authentification info */
698 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
700 msg_Warn( p_sd, "too short SAP packet\n");
703 psz_sdp += p_buffer[1];
706 /* Skip payload type */
707 /* Handle announces without \0 between SAP and SDP */
708 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
710 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
712 msg_Warn( p_sd, "empty SDP ?");
717 if( *psz_sdp == '\0' )
721 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
723 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
725 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
727 msg_Warn( p_sd, "package without content" );
732 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
739 /* Decide whether we should add a playlist item for this SDP */
740 /* Parse connection information (c= & m= ) */
741 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
743 p_sdp->psz_uri = NULL;
746 /* Multi-media or no-parse -> pass to LIVE.COM */
747 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
748 p_sdp->i_media_type != 32 &&
749 p_sdp->i_media_type != 33) ||
750 p_sd->p_sys->b_parse == VLC_FALSE )
752 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
753 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
756 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
758 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
761 /* FIXME: we create a new announce each time the sdp changes */
762 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
766 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
770 p_sd->p_sys->pp_announces[i]->i_last = mdate();
772 FreeSDP( p_sdp ); p_sdp = NULL;
777 if( p_sdp->i_media > 1 )
779 msg_Dbg( p_sd, "passing to liveMedia" );
782 CreateAnnounce( p_sd, i_hash, p_sdp );
784 FREENULL( p_decompressed_buffer );
788 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
791 input_item_t *p_input;
792 playlist_item_t *p_item, *p_child;
794 sap_announce_t *p_sap = (sap_announce_t *)malloc(
795 sizeof(sap_announce_t ) );
796 services_discovery_sys_t *p_sys;
802 EnsureUTF8( p_sdp->psz_sessionname );
803 p_sap->i_last = mdate();
804 p_sap->i_hash = i_hash;
805 p_sap->p_sdp = p_sdp;
807 /* Create the actual playlist item here */
808 p_input = input_ItemNewWithType( VLC_OBJECT(p_sd),
809 p_sap->p_sdp->psz_uri,
810 p_sdp->psz_sessionname,
811 0, NULL, -1, ITEM_TYPE_NET );
812 p_sap->i_input_id = p_input->i_id;
819 if( p_sys->b_timeshift )
820 input_ItemAddOption( p_input, ":access-filter=timeshift" );
822 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
823 if( psz_value != NULL )
825 input_ItemAddInfo( p_input, _("Session"),_("Tool"), psz_value );
827 if( strcmp( p_sdp->psz_username, "-" ) )
829 input_ItemAddInfo( p_input, _("Session"),
830 _("User"), p_sdp->psz_username );
834 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
835 if( psz_value == NULL )
836 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
838 if( psz_value != NULL )
840 EnsureUTF8( psz_value );
842 p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
844 if( p_child == NULL )
846 p_child = playlist_NodeCreate( pl_Get( p_sd ), psz_value,
848 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
853 p_child = p_sys->p_node_cat;
856 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input, p_child,
857 PLAYLIST_APPEND, PLAYLIST_END );
858 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
859 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
860 p_sap->i_item_id_cat = p_item->i_id;
862 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input,
863 p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
864 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
865 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
866 p_sap->i_item_id_one = p_item->i_id;
868 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
873 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
877 for( i = 0 ; i< p_sdp->i_attributes; i++ )
879 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
880 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
882 return p_sdp->pp_attributes[i]->psz_value;
889 /* Fill p_sdp->psz_uri */
890 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
892 char *psz_eof = NULL;
893 char *psz_parse = NULL;
894 char *psz_uri = NULL;
895 char *psz_proto = NULL;
896 char psz_source[256];
900 if( p_sdp->psz_connection )
902 psz_parse = p_sdp->psz_connection;
904 psz_eof = strchr( psz_parse, ' ' );
909 psz_parse = psz_eof + 1;
913 msg_Warn( p_obj, "unable to parse c field (1)");
917 psz_eof = strchr( psz_parse, ' ' );
922 if( !strncmp( psz_parse, "IP4", 3 ) )
926 else if( !strncmp( psz_parse, "IP6", 3 ) )
934 psz_parse = psz_eof + 1;
938 msg_Warn( p_obj, "unable to parse c field (2)");
942 psz_eof = strchr( psz_parse, '/' );
950 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
952 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
954 asprintf( &psz_uri, "[%s]", psz_parse );
956 else psz_uri = strdup( psz_parse );
961 if( p_sdp->psz_media )
963 psz_parse = p_sdp->psz_media;
965 psz_eof = strchr( psz_parse, ' ' );
971 if( strncmp( psz_parse, "audio", 5 ) &&
972 strncmp( psz_parse, "video", 5 ) )
974 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
979 psz_parse = psz_eof + 1;
983 msg_Warn( p_obj, "unable to parse m field (1)");
988 psz_eof = strchr( psz_parse, ' ' );
994 /* FIXME : multiple port ! */
995 i_port = atoi( psz_parse );
997 if( i_port <= 0 || i_port >= 65536 )
999 msg_Warn( p_obj, "invalid transport port %i", i_port );
1002 psz_parse = psz_eof + 1;
1006 msg_Warn( p_obj, "unable to parse m field (2)");
1007 FREENULL( psz_uri );
1008 return VLC_EGENERIC;
1011 psz_eof = strchr( psz_parse, ' ' );
1016 psz_proto = strdup( psz_parse );
1018 psz_parse = psz_eof + 1;
1019 p_sdp->i_media_type = atoi( psz_parse );
1024 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1025 p_sdp->i_media_type = 33;
1026 psz_proto = strdup( psz_parse );
1030 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1033 psz_proto = strdup( "rtp" );
1035 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1038 psz_proto = strdup( "udp" );
1041 /* FIXME: HTTP support */
1048 /* handle SSM case */
1049 psz_parse = GetAttribute( p_sdp, "source-filter" );
1050 psz_source[0] = '\0';
1052 if( psz_parse ) sscanf( psz_parse, " incl IN IP%*s %*s %255s ", psz_source);
1054 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1057 FREENULL( psz_uri );
1058 FREENULL( psz_proto );
1062 /***********************************************************************
1063 * ParseSDP : SDP parsing
1064 * *********************************************************************
1065 * Validate SDP and parse all fields
1066 ***********************************************************************/
1067 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1070 vlc_bool_t b_invalid = VLC_FALSE;
1071 vlc_bool_t b_end = VLC_FALSE;
1072 if( psz_sdp == NULL )
1077 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1079 msg_Warn( p_obj, "bad packet" );
1083 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1087 p_sdp->psz_sdp = strdup( psz_sdp );
1088 if( p_sdp->psz_sdp == NULL )
1094 p_sdp->psz_sessionname = NULL;
1095 p_sdp->psz_media = NULL;
1096 p_sdp->psz_connection = NULL;
1097 p_sdp->psz_uri = NULL;
1098 p_sdp->psz_address = NULL;
1099 p_sdp->psz_address_type= NULL;
1102 p_sdp->i_attributes = 0;
1103 p_sdp->pp_attributes = NULL;
1105 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1112 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1113 *psz_sdp == ' ' || *psz_sdp == '\t' )
1118 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1120 psz_eol = psz_sdp + strlen( psz_sdp );
1123 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1128 if( psz_eol <= psz_sdp )
1134 /* no space allowed between fields */
1135 if( psz_sdp[1] != '=' )
1137 msg_Warn( p_obj, "invalid packet" ) ;
1138 FreeSDP( p_sdp ); p_sdp = NULL;
1142 /* Now parse each line */
1143 switch( psz_sdp[0] )
1148 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1153 /* o field is <username> <session id> <version>
1154 * <network type> <address type> <address> */
1156 #define GET_FIELD( store ) \
1157 psz_eof = strchr( psz_parse, ' ' ); \
1160 *psz_eof=0; store = strdup( psz_parse ); \
1164 if( i_field != 5 ) \
1166 b_invalid = VLC_TRUE; break; \
1170 store = strdup( psz_parse ); \
1173 psz_parse = psz_eof + 1; i_field++;
1176 psz_parse = &psz_sdp[2];
1177 GET_FIELD( p_sdp->psz_username );
1178 GET_FIELD( psz_sess_id );
1180 p_sdp->i_session_id = atoll( psz_sess_id );
1182 FREENULL( psz_sess_id );
1184 GET_FIELD( psz_sess_id );
1185 FREENULL( psz_sess_id );
1187 GET_FIELD( p_sdp->psz_network_type );
1188 GET_FIELD( p_sdp->psz_address_type );
1189 GET_FIELD( p_sdp->psz_address );
1200 case( 'a' ): /* attribute */
1202 char *psz_eon = strchr( &psz_sdp[2], ':' );
1203 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1205 /* Attribute with value */
1210 p_attr->psz_field = strdup( &psz_sdp[2] );
1211 p_attr->psz_value = strdup( psz_eon );
1213 else /* Attribute without value */
1215 p_attr->psz_field = strdup( &psz_sdp[2] );
1216 p_attr->psz_value = NULL;
1219 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1223 case( 'm' ): /* Media announcement */
1225 /* If we have several medias, we pass the announcement to
1226 * LIVE.COM, so just count them */
1228 if( p_sdp->i_media == 1 )
1230 p_sdp->psz_media = strdup( &psz_sdp[2] );
1237 if( p_sdp->i_media > 1 )
1240 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1250 FreeSDP( p_sdp ); p_sdp = NULL;
1260 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1263 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1267 net_StopSend( i_fd );
1268 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1269 p_sd->p_sys->i_fd, i_fd );
1273 return VLC_EGENERIC;
1277 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1279 int i_result, i_dstsize, n;
1280 unsigned char *psz_dst;
1283 d_stream.zalloc = (alloc_func)0;
1284 d_stream.zfree = (free_func)0;
1285 d_stream.opaque = (voidpf)0;
1287 i_result = inflateInit(&d_stream);
1288 if( i_result != Z_OK )
1290 printf( "inflateInit() failed. Result: %d\n", i_result );
1293 d_stream.next_in = (Bytef *)psz_src;
1294 d_stream.avail_in = i_len;
1302 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1303 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1304 d_stream.avail_out = 1000;
1306 i_result = inflate(&d_stream, Z_NO_FLUSH);
1307 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1309 printf( "Zlib decompression failed. Result: %d\n", i_result );
1313 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1314 ( i_result != Z_STREAM_END ) );
1316 i_dstsize = d_stream.total_out;
1317 inflateEnd( &d_stream );
1319 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1326 static void FreeSDP( sdp_t *p_sdp )
1329 FREENULL( p_sdp->psz_sdp );
1330 FREENULL( p_sdp->psz_sessionname );
1331 FREENULL( p_sdp->psz_connection );
1332 FREENULL( p_sdp->psz_media );
1333 FREENULL( p_sdp->psz_uri );
1334 FREENULL( p_sdp->psz_username );
1335 FREENULL( p_sdp->psz_network_type );
1337 FREENULL( p_sdp->psz_address );
1338 FREENULL( p_sdp->psz_address_type );
1340 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1342 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1343 FREENULL( p_sdp->pp_attributes[i]->psz_field );
1344 FREENULL( p_sdp->pp_attributes[i]->psz_value );
1345 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1351 static int RemoveAnnounce( services_discovery_t *p_sd,
1352 sap_announce_t *p_announce )
1356 if( p_announce->p_sdp )
1358 FreeSDP( p_announce->p_sdp );
1359 p_announce->p_sdp = NULL;
1362 if( p_announce->i_input_id > -1 )
1363 playlist_LockDeleteAllFromInput( pl_Get(p_sd), p_announce->i_input_id );
1365 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1367 if( p_sd->p_sys->pp_announces[i] == p_announce )
1369 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1380 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1382 /* A session is identified by
1383 * username, session_id, network type, address type and address */
1384 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1385 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1386 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1387 p_sdp1->psz_address && p_sdp2->psz_address )
1389 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1390 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1391 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1392 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1393 p_sdp1->i_session_id == p_sdp2->i_session_id )
1409 static void CacheLoad( services_discovery_t *p_sd )
1411 msg_Warn( p_sd, "cache not implemented") ;
1414 static void CacheSave( services_discovery_t *p_sd )
1416 msg_Warn( p_sd, "cache not implemented") ;