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;
227 playlist_t *p_playlist;
229 /* Table of announces */
231 struct sap_announce_t **pp_announces;
236 vlc_bool_t b_timeshift;
246 /*****************************************************************************
248 *****************************************************************************/
252 static int Demux( demux_t *p_demux );
253 static int Control( demux_t *, int, va_list );
254 static void Run ( services_discovery_t *p_sd );
256 /* Main parsing functions */
257 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
258 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
259 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
260 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
261 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
264 static void CacheLoad( services_discovery_t *p_sd );
265 static void CacheSave( services_discovery_t *p_sd );
266 /* Helper functions */
267 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
268 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
269 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
271 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
273 static void FreeSDP( sdp_t *p_sdp );
277 if( p ) { free( p ); (p) = NULL; }
278 /*****************************************************************************
279 * Open: initialize and create stuff
280 *****************************************************************************/
281 static int Open( vlc_object_t *p_this )
283 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
284 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
285 malloc( sizeof( services_discovery_sys_t ) );
287 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
295 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
296 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
299 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
305 /* Cache sap_timeshift value */
306 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
307 ? VLC_TRUE : VLC_FALSE;
309 /* Create our playlist node */
310 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
313 if( !p_sys->p_playlist )
315 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
319 playlist_NodesCreateForSD( p_sys->p_playlist, _("SAP sessions"),
320 &p_sys->p_node_cat, &p_sys->p_node_one );
322 p_sys->i_announces = 0;
323 p_sys->pp_announces = NULL;
328 /*****************************************************************************
329 * OpenDemux: initialize and create stuff
330 *****************************************************************************/
331 static int OpenDemux( vlc_object_t *p_this )
333 demux_t *p_demux = (demux_t *)p_this;
335 int i_max_sdp = 1024;
337 char *psz_sdp = NULL;
340 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
342 /* We want livedotcom module to parse this SDP file */
349 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
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] != '=' ) )
359 psz_sdp = (char *)malloc( i_max_sdp );
360 if( !psz_sdp ) return VLC_EGENERIC;
362 /* Gather the complete sdp file */
365 int i_read = stream_Read( p_demux->s,
366 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
370 msg_Err( p_demux, "failed to read SDP" );
376 if( i_read < i_max_sdp - i_sdp - 1 )
378 psz_sdp[i_sdp] = '\0';
383 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
386 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
390 msg_Warn( p_demux, "invalid SDP");
394 if( p_sdp->i_media > 1 )
399 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
401 p_sdp->psz_uri = NULL;
403 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
404 p_sdp->i_media_type != 14 )
407 if( p_sdp->psz_uri == NULL ) goto error;
409 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
410 p_demux->p_sys->p_sdp = p_sdp;
411 p_demux->pf_control = Control;
412 p_demux->pf_demux = Demux;
419 if( p_sdp ) FreeSDP( p_sdp ); p_sdp = NULL;
420 stream_Seek( p_demux->s, 0 );
424 /*****************************************************************************
426 *****************************************************************************/
427 static void Close( vlc_object_t *p_this )
429 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
430 services_discovery_sys_t *p_sys = p_sd->p_sys;
434 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
436 net_Close( p_sys->pi_fd[i] );
438 FREE( p_sys->pi_fd );
441 if( config_GetInt( p_sd, "sap-cache" ) )
447 for( i = p_sys->i_announces - 1; i>= 0; i-- )
449 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
451 FREE( p_sys->pp_announces );
453 if( p_sys->p_playlist )
455 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_cat, VLC_TRUE,
457 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_one, VLC_TRUE,
459 vlc_object_release( p_sys->p_playlist );
465 /*****************************************************************************
466 * CloseDemux: Close the demuxer
467 *****************************************************************************/
468 static void CloseDemux( vlc_object_t *p_this )
470 demux_t *p_demux = (demux_t *)p_this;
473 if( p_demux->p_sys->p_sdp ) { FreeSDP( p_demux->p_sys->p_sdp ); p_demux->p_sys->p_sdp = NULL; }
474 free( p_demux->p_sys );
478 /*****************************************************************************
479 * Run: main SAP thread
480 *****************************************************************************
481 * Listens to SAP packets, and sends them to packet_handle
482 *****************************************************************************/
483 #define MAX_SAP_BUFFER 5000
485 static void Run( services_discovery_t *p_sd )
490 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
491 * DNS queries, even if the DNS server returns an error with milliseconds.
492 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
493 * Winsock 1.1 from Windows 95, if not Windows 3.1.
494 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
495 * we have to open sockets in Run() rather than Open(). */
496 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
498 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
499 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
500 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
501 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
503 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
505 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
508 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
510 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
511 InitSocket( p_sd, psz_address, SAP_PORT );
515 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
516 if( psz_addr && *psz_addr )
518 InitSocket( p_sd, psz_addr, SAP_PORT );
522 if( p_sd->p_sys->i_fd == 0 )
524 msg_Err( p_sd, "unable to listen on any address" );
528 /* read SAP packets */
529 while( !p_sd->b_die )
532 uint8_t p_buffer[MAX_SAP_BUFFER+1];
534 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
535 p_sd->p_sys->i_fd, p_buffer,
536 MAX_SAP_BUFFER, 500000 );
538 /* Check for items that need deletion */
539 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
541 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
543 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
545 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i] );
549 /* Minimum length is > 6 */
554 msg_Warn( p_sd, "socket read error" );
559 p_buffer[i_read] = '\0';
561 /* Parse the packet */
562 ParseSAP( p_sd, p_buffer, i_read );
566 /**********************************************************************
567 * Demux: reads and demuxes data packets
568 * Return -1 if error, 0 if EOF, 1 else
569 **********************************************************************/
570 static int Demux( demux_t *p_demux )
572 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
573 playlist_t *p_playlist;
574 input_thread_t *p_input;
575 input_item_t *p_parent_input;
577 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
581 msg_Err( p_demux, "playlist could not be found" );
585 p_input = (input_thread_t *)vlc_object_find( p_demux, VLC_OBJECT_INPUT,
589 msg_Err( p_demux, "parent input could not be found" );
593 p_parent_input = p_input->input.p_item;
595 vlc_mutex_lock( &p_parent_input->lock );
596 FREE( p_parent_input->psz_uri );
597 p_parent_input->psz_uri = strdup( p_sdp->psz_uri );
598 FREE( p_parent_input->psz_name );
599 p_parent_input->psz_name = strdup( EnsureUTF8( p_sdp->psz_sessionname ) );
600 p_parent_input->i_type = ITEM_TYPE_NET;
602 if( p_playlist->status.p_item &&
603 p_playlist->status.p_item->p_input == p_parent_input )
605 playlist_Control( p_playlist, PLAYLIST_VIEWPLAY,
606 p_playlist->status.p_node, p_playlist->status.p_item );
609 vlc_mutex_unlock( &p_parent_input->lock );
610 vlc_object_release( p_input );
611 vlc_object_release( p_playlist );
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;
629 char *psz_sdp, *psz_foo, *psz_initial_sdp;
630 uint8_t *p_decompressed_buffer = NULL;
632 vlc_bool_t b_compressed;
633 vlc_bool_t b_need_delete = VLC_FALSE;
635 /* First, check the sap announce is correct */
636 i_version = p_buffer[0] >> 5;
639 msg_Dbg( p_sd, "strange sap version %d found", i_version );
642 i_address_type = p_buffer[0] & 0x10;
644 if( (p_buffer[0] & 0x08) != 0 )
646 msg_Dbg( p_sd, "reserved bit incorrectly set" );
650 if( (p_buffer[0] & 0x04) != 0 )
652 msg_Dbg( p_sd, "session deletion packet" );
653 b_need_delete = VLC_TRUE;
656 if( p_buffer[0] & 0x02 )
658 msg_Dbg( p_sd, "encrypted packet, unsupported" );
662 b_compressed = p_buffer[0] & 0x01;
664 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
666 if( p_sd->p_sys->b_strict && i_hash == 0 )
668 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
672 psz_sdp = (char *)p_buffer + 4;
673 psz_initial_sdp = psz_sdp;
675 if( i_address_type == 0 ) /* ipv4 source address */
680 msg_Warn( p_sd, "too short SAP packet" );
684 else /* ipv6 source address */
689 msg_Warn( p_sd, "too short SAP packet" );
697 int i_decompressed_size;
699 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
700 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
701 if( i_decompressed_size > 0 )
703 psz_sdp = (char *)p_decompressed_buffer;
704 realloc( p_decompressed_buffer, i_decompressed_size++ );
705 psz_sdp[i_decompressed_size] = '\0';
709 msg_Warn( p_sd, "decompression of sap packet failed" );
713 msg_Warn( p_sd, "ignoring compressed sap packet" );
718 /* Add the size of authentification info */
719 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
721 msg_Warn( p_sd, "too short SAP packet\n");
724 psz_sdp += p_buffer[1];
727 /* Skip payload type */
728 /* Handle announces without \0 between SAP and SDP */
729 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
731 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
733 msg_Warn( p_sd, "empty SDP ?");
738 if( *psz_sdp == '\0' )
742 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
744 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
746 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
748 msg_Warn( p_sd, "package without content" );
753 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
760 /* Decide whether we should add a playlist item for this SDP */
761 /* Parse connection information (c= & m= ) */
762 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
764 p_sdp->psz_uri = NULL;
767 /* Multi-media or no-parse -> pass to LIVE.COM */
768 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
769 p_sdp->i_media_type != 32 &&
770 p_sdp->i_media_type != 33) ||
771 p_sd->p_sys->b_parse == VLC_FALSE )
773 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
774 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
777 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
779 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
782 /* FIXME: we create a new announce each time the sdp changes */
783 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
787 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
791 p_sd->p_sys->pp_announces[i]->i_last = mdate();
793 FreeSDP( p_sdp ); p_sdp = NULL;
798 if( p_sdp->i_media > 1 )
800 msg_Dbg( p_sd, "passing to liveMedia" );
803 CreateAnnounce( p_sd, i_hash, p_sdp );
805 FREE( p_decompressed_buffer );
809 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
812 input_item_t *p_input;
813 playlist_item_t *p_item, *p_child;
815 sap_announce_t *p_sap = (sap_announce_t *)malloc(
816 sizeof(sap_announce_t ) );
817 services_discovery_sys_t *p_sys;
823 EnsureUTF8( p_sdp->psz_sessionname );
824 p_sap->i_last = mdate();
825 p_sap->i_hash = i_hash;
826 p_sap->p_sdp = p_sdp;
828 /* Create the actual playlist item here */
829 p_input = input_ItemNewWithType( VLC_OBJECT(p_sd),
830 p_sap->p_sdp->psz_uri,
831 p_sdp->psz_sessionname,
832 0, NULL, -1, ITEM_TYPE_NET );
833 p_sap->i_input_id = p_input->i_id;
840 if( p_sys->b_timeshift )
841 vlc_input_item_AddOption( p_input, ":access-filter=timeshift" );
843 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
844 if( psz_value != NULL )
846 vlc_input_item_AddInfo( p_input, _("Session"),_("Tool"), psz_value );
848 if( strcmp( p_sdp->psz_username, "-" ) )
850 vlc_input_item_AddInfo( p_input, _("Session"),
851 _("User"), p_sdp->psz_username );
855 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
856 if( psz_value == NULL )
857 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
859 if( psz_value != NULL )
861 EnsureUTF8( psz_value );
863 p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
865 if( p_child == NULL )
867 p_child = playlist_NodeCreate( p_sys->p_playlist, psz_value,
869 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
874 p_child = p_sys->p_node_cat;
877 p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input, p_child,
878 PLAYLIST_APPEND, PLAYLIST_END );
879 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
880 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
881 p_sap->i_item_id_cat = p_item->i_id;
883 p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input,
884 p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
885 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
886 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
887 p_sap->i_item_id_one = p_item->i_id;
889 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
894 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
898 for( i = 0 ; i< p_sdp->i_attributes; i++ )
900 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
901 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
903 return p_sdp->pp_attributes[i]->psz_value;
910 /* Fill p_sdp->psz_uri */
911 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
913 char *psz_eof = NULL;
914 char *psz_parse = NULL;
915 char *psz_uri = NULL;
916 char *psz_proto = NULL;
917 char psz_source[256];
921 if( p_sdp->psz_connection )
923 psz_parse = p_sdp->psz_connection;
925 psz_eof = strchr( psz_parse, ' ' );
930 psz_parse = psz_eof + 1;
934 msg_Warn( p_obj, "unable to parse c field (1)");
938 psz_eof = strchr( psz_parse, ' ' );
943 if( !strncmp( psz_parse, "IP4", 3 ) )
947 else if( !strncmp( psz_parse, "IP6", 3 ) )
955 psz_parse = psz_eof + 1;
959 msg_Warn( p_obj, "unable to parse c field (2)");
963 psz_eof = strchr( psz_parse, '/' );
971 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
973 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
975 asprintf( &psz_uri, "[%s]", psz_parse );
977 else psz_uri = strdup( psz_parse );
982 if( p_sdp->psz_media )
984 psz_parse = p_sdp->psz_media;
986 psz_eof = strchr( psz_parse, ' ' );
992 if( strncmp( psz_parse, "audio", 5 ) &&
993 strncmp( psz_parse, "video", 5 ) )
995 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
1000 psz_parse = psz_eof + 1;
1004 msg_Warn( p_obj, "unable to parse m field (1)");
1006 return VLC_EGENERIC;
1009 psz_eof = strchr( psz_parse, ' ' );
1015 /* FIXME : multiple port ! */
1016 i_port = atoi( psz_parse );
1018 if( i_port <= 0 || i_port >= 65536 )
1020 msg_Warn( p_obj, "invalid transport port %i", i_port );
1023 psz_parse = psz_eof + 1;
1027 msg_Warn( p_obj, "unable to parse m field (2)");
1029 return VLC_EGENERIC;
1032 psz_eof = strchr( psz_parse, ' ' );
1037 psz_proto = strdup( psz_parse );
1039 psz_parse = psz_eof + 1;
1040 p_sdp->i_media_type = atoi( psz_parse );
1045 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1046 p_sdp->i_media_type = 33;
1047 psz_proto = strdup( psz_parse );
1051 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1054 psz_proto = strdup( "rtp" );
1056 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1059 psz_proto = strdup( "udp" );
1062 /* FIXME: HTTP support */
1069 /* handle SSM case */
1070 psz_parse = GetAttribute( p_sdp, "source-filter" );
1071 psz_source[0] = '\0';
1073 if( psz_parse ) sscanf( psz_parse, " incl IN IP%*s %*s %255s ", psz_source);
1075 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1083 /***********************************************************************
1084 * ParseSDP : SDP parsing
1085 * *********************************************************************
1086 * Validate SDP and parse all fields
1087 ***********************************************************************/
1088 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1091 vlc_bool_t b_invalid = VLC_FALSE;
1092 vlc_bool_t b_end = VLC_FALSE;
1093 if( psz_sdp == NULL )
1098 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1100 msg_Warn( p_obj, "bad packet" );
1104 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1108 p_sdp->psz_sdp = strdup( psz_sdp );
1109 if( p_sdp->psz_sdp == NULL )
1115 p_sdp->psz_sessionname = NULL;
1116 p_sdp->psz_media = NULL;
1117 p_sdp->psz_connection = NULL;
1118 p_sdp->psz_uri = NULL;
1119 p_sdp->psz_address = NULL;
1120 p_sdp->psz_address_type= NULL;
1123 p_sdp->i_attributes = 0;
1124 p_sdp->pp_attributes = NULL;
1126 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1133 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1134 *psz_sdp == ' ' || *psz_sdp == '\t' )
1139 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1141 psz_eol = psz_sdp + strlen( psz_sdp );
1144 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1149 if( psz_eol <= psz_sdp )
1155 /* no space allowed between fields */
1156 if( psz_sdp[1] != '=' )
1158 msg_Warn( p_obj, "invalid packet" ) ;
1159 FreeSDP( p_sdp ); p_sdp = NULL;
1163 /* Now parse each line */
1164 switch( psz_sdp[0] )
1169 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1174 /* o field is <username> <session id> <version>
1175 * <network type> <address type> <address> */
1177 #define GET_FIELD( store ) \
1178 psz_eof = strchr( psz_parse, ' ' ); \
1181 *psz_eof=0; store = strdup( psz_parse ); \
1185 if( i_field != 5 ) \
1187 b_invalid = VLC_TRUE; break; \
1191 store = strdup( psz_parse ); \
1194 psz_parse = psz_eof + 1; i_field++;
1197 psz_parse = &psz_sdp[2];
1198 GET_FIELD( p_sdp->psz_username );
1199 GET_FIELD( psz_sess_id );
1201 p_sdp->i_session_id = atoll( psz_sess_id );
1203 FREE( psz_sess_id );
1205 GET_FIELD( psz_sess_id );
1206 FREE( psz_sess_id );
1208 GET_FIELD( p_sdp->psz_network_type );
1209 GET_FIELD( p_sdp->psz_address_type );
1210 GET_FIELD( p_sdp->psz_address );
1221 case( 'a' ): /* attribute */
1223 char *psz_eon = strchr( &psz_sdp[2], ':' );
1224 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1226 /* Attribute with value */
1231 p_attr->psz_field = strdup( &psz_sdp[2] );
1232 p_attr->psz_value = strdup( psz_eon );
1234 else /* Attribute without value */
1236 p_attr->psz_field = strdup( &psz_sdp[2] );
1237 p_attr->psz_value = NULL;
1240 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1244 case( 'm' ): /* Media announcement */
1246 /* If we have several medias, we pass the announcement to
1247 * LIVE.COM, so just count them */
1249 if( p_sdp->i_media == 1 )
1251 p_sdp->psz_media = strdup( &psz_sdp[2] );
1258 if( p_sdp->i_media > 1 )
1261 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1271 FreeSDP( p_sdp ); p_sdp = NULL;
1281 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1284 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1288 net_StopSend( i_fd );
1289 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1290 p_sd->p_sys->i_fd, i_fd );
1294 return VLC_EGENERIC;
1298 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1300 int i_result, i_dstsize, n;
1301 unsigned char *psz_dst;
1304 d_stream.zalloc = (alloc_func)0;
1305 d_stream.zfree = (free_func)0;
1306 d_stream.opaque = (voidpf)0;
1308 i_result = inflateInit(&d_stream);
1309 if( i_result != Z_OK )
1311 printf( "inflateInit() failed. Result: %d\n", i_result );
1314 d_stream.next_in = (Bytef *)psz_src;
1315 d_stream.avail_in = i_len;
1323 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1324 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1325 d_stream.avail_out = 1000;
1327 i_result = inflate(&d_stream, Z_NO_FLUSH);
1328 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1330 printf( "Zlib decompression failed. Result: %d\n", i_result );
1334 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1335 ( i_result != Z_STREAM_END ) );
1337 i_dstsize = d_stream.total_out;
1338 inflateEnd( &d_stream );
1340 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1347 static void FreeSDP( sdp_t *p_sdp )
1350 FREE( p_sdp->psz_sdp );
1351 FREE( p_sdp->psz_sessionname );
1352 FREE( p_sdp->psz_connection );
1353 FREE( p_sdp->psz_media );
1354 FREE( p_sdp->psz_uri );
1355 FREE( p_sdp->psz_username );
1356 FREE( p_sdp->psz_network_type );
1358 FREE( p_sdp->psz_address );
1359 FREE( p_sdp->psz_address_type );
1361 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1363 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1364 FREE( p_sdp->pp_attributes[i]->psz_field );
1365 FREE( p_sdp->pp_attributes[i]->psz_value );
1366 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1372 static int RemoveAnnounce( services_discovery_t *p_sd,
1373 sap_announce_t *p_announce )
1377 if( p_announce->p_sdp )
1379 FreeSDP( p_announce->p_sdp );
1380 p_announce->p_sdp = NULL;
1383 if( p_announce->i_input_id > -1 )
1385 playlist_LockDeleteAllFromInput(
1386 p_sd->p_sys->p_playlist, p_announce->i_input_id );
1389 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1391 if( p_sd->p_sys->pp_announces[i] == p_announce )
1393 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1404 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1406 /* A session is identified by
1407 * username, session_id, network type, address type and address */
1408 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1409 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1410 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1411 p_sdp1->psz_address && p_sdp2->psz_address )
1413 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1414 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1415 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1416 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1417 p_sdp1->i_session_id == p_sdp2->i_session_id )
1433 static void CacheLoad( services_discovery_t *p_sd )
1435 msg_Warn( p_sd, "cache not implemented") ;
1438 static void CacheSave( services_discovery_t *p_sd )
1440 msg_Warn( p_sd, "cache not implemented") ;