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 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #include <vlc/input.h>
43 #ifdef HAVE_SYS_TIME_H
44 # include <sys/time.h>
51 /************************************************************************
52 * Macros and definitions
53 ************************************************************************/
55 #define MAX_LINE_LENGTH 256
57 /* SAP is always on that port */
59 /* Global-scope SAP address */
60 #define SAP_V4_GLOBAL_ADDRESS "224.2.127.254"
61 /* Organization-local SAP address */
62 #define SAP_V4_ORG_ADDRESS "239.195.255.255"
63 /* Local (smallest non-link-local scope) SAP address */
64 #define SAP_V4_LOCAL_ADDRESS "239.255.255.255"
65 /* Link-local SAP address */
66 #define SAP_V4_LINK_ADDRESS "224.0.0.255"
69 #define SAP_V6_1 "FF0"
70 /* Scope is inserted between them */
71 #define SAP_V6_2 "::2:7FFE"
72 /* See RFC3513 for list of valid scopes */
73 /* FIXME: find a way to listen to link-local scope */
74 static const char ipv6_scopes[] = "1456789ABCDE";
77 /*****************************************************************************
79 *****************************************************************************/
80 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
81 #define SAP_ADDR_LONGTEXT N_( "The SAP module normally chooses itself the " \
82 "right addresses to listen to. However, you " \
83 "can specify a specific address." )
84 #define SAP_IPV4_TEXT N_( "IPv4 SAP" )
85 #define SAP_IPV4_LONGTEXT N_( \
86 "Listen to IPv4 announcements " \
87 "on the standard address." )
88 #define SAP_IPV6_TEXT N_( "IPv6 SAP" )
89 #define SAP_IPV6_LONGTEXT N_( \
90 "Listen to IPv6 announcements " \
91 "on the standard addresses." )
92 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
93 #define SAP_SCOPE_LONGTEXT N_( \
94 "Scope for IPv6 announcements (default is 8)." )
95 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
96 #define SAP_TIMEOUT_LONGTEXT N_( \
97 "Delay after which SAP items get deleted if no new announcement " \
99 #define SAP_PARSE_TEXT N_( "Try to parse the announce" )
100 #define SAP_PARSE_LONGTEXT N_( \
101 "This enables actual parsing of the announces by the SAP module. " \
102 "Otherwise, all announcements are parsed by the \"livedotcom\" " \
103 "(RTP/RTSP) module." )
104 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
105 #define SAP_STRICT_LONGTEXT N_( \
106 "When this is set, the SAP parser will discard some non-compliant " \
108 #define SAP_CACHE_TEXT N_("Use SAP cache")
109 #define SAP_CACHE_LONGTEXT N_( \
110 "This enables a SAP caching mechanism. " \
111 "This will result in lower SAP startup time, but you could end up " \
112 "with items corresponding to legacy streams." )
113 #define SAP_TIMESHIFT_TEXT N_("Allow timeshifting")
114 #define SAP_TIMESHIFT_LONGTEXT N_( "This automatically enables timeshifting " \
115 "for streams discovered through SAP announcements." )
118 static int Open ( vlc_object_t * );
119 static void Close( vlc_object_t * );
120 static int OpenDemux ( vlc_object_t * );
121 static void CloseDemux ( vlc_object_t * );
124 set_shortname( _("SAP"));
125 set_description( _("SAP Announcements") );
126 set_category( CAT_PLAYLIST );
127 set_subcategory( SUBCAT_PLAYLIST_SD );
129 add_string( "sap-addr", NULL, NULL,
130 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
131 add_bool( "sap-ipv4", 1 , NULL,
132 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
133 add_bool( "sap-ipv6", 1 , NULL,
134 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
135 add_integer( "sap-timeout", 1800, NULL,
136 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
137 add_bool( "sap-parse", 1 , NULL,
138 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
139 add_bool( "sap-strict", 0 , NULL,
140 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
142 add_bool( "sap-cache", 0 , NULL,
143 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
145 add_bool( "sap-timeshift", 0 , NULL,
146 SAP_TIMESHIFT_TEXT,SAP_TIMESHIFT_LONGTEXT, VLC_TRUE );
148 set_capability( "services_discovery", 0 );
149 set_callbacks( Open, Close );
152 set_description( _("SDP file parser for UDP") );
153 add_shortcut( "sdp" );
154 set_capability( "demux2", 51 );
155 set_callbacks( OpenDemux, CloseDemux );
159 /*****************************************************************************
161 *****************************************************************************/
163 typedef struct sdp_t sdp_t;
164 typedef struct attribute_t attribute_t;
165 typedef struct sap_announce_t sap_announce_t;
167 /* The structure that contains sdp information */
173 char *psz_sessionname;
175 /* Raw m= and c= fields */
176 char *psz_connection;
181 char *psz_network_type;
182 char *psz_address_type;
184 int64_t i_session_id;
189 int i_in; /* IP version */
195 attribute_t **pp_attributes;
204 struct sap_announce_t
209 uint32_t i_source[4];
211 /* SAP annnounces must only contain one SDP */
219 struct services_discovery_sys_t
221 /* Socket descriptors */
226 playlist_item_t *p_node_cat;
227 playlist_item_t *p_node_one;
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 );
263 /* Helper functions */
264 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
265 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
266 static int InitSocket( services_discovery_t *p_sd, const char *psz_address, int i_port );
268 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
270 static void FreeSDP( sdp_t *p_sdp );
272 /*****************************************************************************
273 * Open: initialize and create stuff
274 *****************************************************************************/
275 static int Open( vlc_object_t *p_this )
277 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
278 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
279 malloc( sizeof( services_discovery_sys_t ) );
281 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
289 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
290 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
293 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
299 /* Cache sap_timeshift value */
300 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
301 ? VLC_TRUE : VLC_FALSE;
303 /* Create our playlist node */
306 playlist_NodesPairCreate( pl_Get( p_sd ), _("SAP sessions"),
307 &p_sys->p_node_cat, &p_sys->p_node_one,
310 p_sys->i_announces = 0;
311 p_sys->pp_announces = NULL;
316 /*****************************************************************************
317 * OpenDemux: initialize and create stuff
318 *****************************************************************************/
319 static int OpenDemux( vlc_object_t *p_this )
321 demux_t *p_demux = (demux_t *)p_this;
323 int i_max_sdp = 1024;
325 char *psz_sdp = NULL;
328 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
330 /* We want livedotcom module to parse this SDP file */
337 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
339 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
340 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
341 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
347 psz_sdp = (char *)malloc( i_max_sdp );
348 if( !psz_sdp ) return VLC_EGENERIC;
350 /* Gather the complete sdp file */
353 int i_read = stream_Read( p_demux->s,
354 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
358 msg_Err( p_demux, "failed to read SDP" );
364 if( i_read < i_max_sdp - i_sdp - 1 )
366 psz_sdp[i_sdp] = '\0';
371 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
374 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
378 msg_Warn( p_demux, "invalid SDP");
382 if( p_sdp->i_media > 1 )
387 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
389 p_sdp->psz_uri = NULL;
391 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
392 p_sdp->i_media_type != 14 )
395 if( p_sdp->psz_uri == NULL ) goto error;
397 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
398 p_demux->p_sys->p_sdp = p_sdp;
399 p_demux->pf_control = Control;
400 p_demux->pf_demux = Demux;
407 if( p_sdp ) FreeSDP( p_sdp ); p_sdp = NULL;
408 stream_Seek( p_demux->s, 0 );
412 /*****************************************************************************
414 *****************************************************************************/
415 static void Close( vlc_object_t *p_this )
417 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
418 services_discovery_sys_t *p_sys = p_sd->p_sys;
422 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
424 net_Close( p_sys->pi_fd[i] );
426 FREENULL( p_sys->pi_fd );
429 if( config_GetInt( p_sd, "sap-cache" ) )
435 for( i = p_sys->i_announces - 1; i>= 0; i-- )
437 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
439 FREENULL( p_sys->pp_announces );
441 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_cat, VLC_TRUE,
443 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_one, VLC_TRUE,
449 /*****************************************************************************
450 * CloseDemux: Close the demuxer
451 *****************************************************************************/
452 static void CloseDemux( vlc_object_t *p_this )
454 demux_t *p_demux = (demux_t *)p_this;
457 if( p_demux->p_sys->p_sdp ) { FreeSDP( p_demux->p_sys->p_sdp ); p_demux->p_sys->p_sdp = NULL; }
458 free( p_demux->p_sys );
462 /*****************************************************************************
463 * Run: main SAP thread
464 *****************************************************************************
465 * Listens to SAP packets, and sends them to packet_handle
466 *****************************************************************************/
467 #define MAX_SAP_BUFFER 5000
469 static void Run( services_discovery_t *p_sd )
474 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
475 * DNS queries, even if the DNS server returns an error with milliseconds.
476 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
477 * Winsock 1.1 from Windows 95, if not Windows 3.1.
478 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
479 * we have to open sockets in Run() rather than Open(). */
480 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
482 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
483 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
484 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
485 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
487 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
489 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
492 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
494 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
495 InitSocket( p_sd, psz_address, SAP_PORT );
499 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
500 if( psz_addr && *psz_addr )
502 InitSocket( p_sd, psz_addr, SAP_PORT );
506 if( p_sd->p_sys->i_fd == 0 )
508 msg_Err( p_sd, "unable to listen on any address" );
512 /* read SAP packets */
513 while( !p_sd->b_die )
516 uint8_t p_buffer[MAX_SAP_BUFFER+1];
518 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
519 p_sd->p_sys->i_fd, p_buffer,
520 MAX_SAP_BUFFER, 500000 );
522 /* Check for items that need deletion */
523 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
525 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
527 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
529 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i] );
533 /* Minimum length is > 6 */
538 msg_Warn( p_sd, "socket read error" );
543 p_buffer[i_read] = '\0';
545 /* Parse the packet */
546 ParseSAP( p_sd, p_buffer, i_read );
550 /**********************************************************************
551 * Demux: reads and demuxes data packets
552 * Return -1 if error, 0 if EOF, 1 else
553 **********************************************************************/
554 static int Demux( demux_t *p_demux )
556 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
557 input_thread_t *p_input;
558 input_item_t *p_parent_input;
560 playlist_t *p_playlist = pl_Yield( p_demux );
561 p_input = (input_thread_t *)vlc_object_find( p_demux, VLC_OBJECT_INPUT,
566 msg_Err( p_demux, "parent input could not be found" );
570 p_parent_input = p_input->input.p_item;
572 vlc_mutex_lock( &p_parent_input->lock );
573 FREENULL( p_parent_input->psz_uri );
574 p_parent_input->psz_uri = strdup( p_sdp->psz_uri );
575 FREENULL( p_parent_input->psz_name );
576 p_parent_input->psz_name = strdup( EnsureUTF8( p_sdp->psz_sessionname ) );
577 p_parent_input->i_type = ITEM_TYPE_NET;
579 if( p_playlist->status.p_item &&
580 p_playlist->status.p_item->p_input == p_parent_input )
582 playlist_Control( p_playlist, PLAYLIST_VIEWPLAY,
583 p_playlist->status.p_node, p_playlist->status.p_item );
586 vlc_mutex_unlock( &p_parent_input->lock );
587 vlc_object_release( p_input );
588 vlc_object_release( p_playlist );
593 static int Control( demux_t *p_demux, int i_query, va_list args )
598 /**************************************************************
600 **************************************************************/
602 /* i_read is at least > 6 */
603 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
605 int i_version, i_address_type, i_hash, i;
606 char *psz_sdp, *psz_foo, *psz_initial_sdp;
607 uint8_t *p_decompressed_buffer = NULL;
609 vlc_bool_t b_compressed;
610 vlc_bool_t b_need_delete = VLC_FALSE;
612 /* First, check the sap announce is correct */
613 i_version = p_buffer[0] >> 5;
616 msg_Dbg( p_sd, "strange sap version %d found", i_version );
619 i_address_type = p_buffer[0] & 0x10;
621 if( (p_buffer[0] & 0x08) != 0 )
623 msg_Dbg( p_sd, "reserved bit incorrectly set" );
627 if( (p_buffer[0] & 0x04) != 0 )
629 msg_Dbg( p_sd, "session deletion packet" );
630 b_need_delete = VLC_TRUE;
633 if( p_buffer[0] & 0x02 )
635 msg_Dbg( p_sd, "encrypted packet, unsupported" );
639 b_compressed = p_buffer[0] & 0x01;
641 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
643 if( p_sd->p_sys->b_strict && i_hash == 0 )
645 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
649 psz_sdp = (char *)p_buffer + 4;
650 psz_initial_sdp = psz_sdp;
652 if( i_address_type == 0 ) /* ipv4 source address */
657 msg_Warn( p_sd, "too short SAP packet" );
661 else /* ipv6 source address */
666 msg_Warn( p_sd, "too short SAP packet" );
674 int i_decompressed_size;
676 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
677 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
678 if( i_decompressed_size > 0 )
680 psz_sdp = (char *)p_decompressed_buffer;
681 realloc( p_decompressed_buffer, i_decompressed_size++ );
682 psz_sdp[i_decompressed_size] = '\0';
686 msg_Warn( p_sd, "decompression of sap packet failed" );
690 msg_Warn( p_sd, "ignoring compressed sap packet" );
695 /* Add the size of authentification info */
696 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
698 msg_Warn( p_sd, "too short SAP packet\n");
701 psz_sdp += p_buffer[1];
704 /* Skip payload type */
705 /* Handle announces without \0 between SAP and SDP */
706 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
708 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
710 msg_Warn( p_sd, "empty SDP ?");
715 if( *psz_sdp == '\0' )
719 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
721 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
723 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
725 msg_Warn( p_sd, "package without content" );
730 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
737 /* Decide whether we should add a playlist item for this SDP */
738 /* Parse connection information (c= & m= ) */
739 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
741 p_sdp->psz_uri = NULL;
744 /* Multi-media or no-parse -> pass to LIVE.COM */
745 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
746 p_sdp->i_media_type != 32 &&
747 p_sdp->i_media_type != 33) ||
748 p_sd->p_sys->b_parse == VLC_FALSE )
750 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
751 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
754 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
756 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
759 /* FIXME: we create a new announce each time the sdp changes */
760 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
764 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
768 p_sd->p_sys->pp_announces[i]->i_last = mdate();
770 FreeSDP( p_sdp ); p_sdp = NULL;
775 if( p_sdp->i_media > 1 )
777 msg_Dbg( p_sd, "passing to liveMedia" );
780 CreateAnnounce( p_sd, i_hash, p_sdp );
782 FREENULL( p_decompressed_buffer );
786 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
789 input_item_t *p_input;
790 playlist_item_t *p_item, *p_child;
792 sap_announce_t *p_sap = (sap_announce_t *)malloc(
793 sizeof(sap_announce_t ) );
794 services_discovery_sys_t *p_sys;
800 EnsureUTF8( p_sdp->psz_sessionname );
801 p_sap->i_last = mdate();
802 p_sap->i_hash = i_hash;
803 p_sap->p_sdp = p_sdp;
805 /* Create the actual playlist item here */
806 p_input = input_ItemNewWithType( VLC_OBJECT(p_sd),
807 p_sap->p_sdp->psz_uri,
808 p_sdp->psz_sessionname,
809 0, NULL, -1, ITEM_TYPE_NET );
810 p_sap->i_input_id = p_input->i_id;
817 if( p_sys->b_timeshift )
818 input_ItemAddOption( p_input, ":access-filter=timeshift" );
820 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
821 if( psz_value != NULL )
823 input_ItemAddInfo( p_input, _("Session"),_("Tool"), psz_value );
825 if( strcmp( p_sdp->psz_username, "-" ) )
827 input_ItemAddInfo( p_input, _("Session"),
828 _("User"), p_sdp->psz_username );
832 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
833 if( psz_value == NULL )
834 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
836 if( psz_value != NULL )
838 EnsureUTF8( psz_value );
840 p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
842 if( p_child == NULL )
844 p_child = playlist_NodeCreate( pl_Get( p_sd ), psz_value,
846 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
851 p_child = p_sys->p_node_cat;
854 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input, p_child,
855 PLAYLIST_APPEND, PLAYLIST_END );
856 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
857 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
858 p_sap->i_item_id_cat = p_item->i_id;
860 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input,
861 p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
862 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
863 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
864 p_sap->i_item_id_one = p_item->i_id;
866 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
871 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
875 for( i = 0 ; i< p_sdp->i_attributes; i++ )
877 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
878 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
880 return p_sdp->pp_attributes[i]->psz_value;
887 /* Fill p_sdp->psz_uri */
888 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
890 char *psz_eof = NULL;
891 char *psz_parse = NULL;
892 char *psz_uri = NULL;
893 char *psz_proto = NULL;
897 if( p_sdp->psz_connection )
899 psz_parse = p_sdp->psz_connection;
901 psz_eof = strchr( psz_parse, ' ' );
906 psz_parse = psz_eof + 1;
910 msg_Warn( p_obj, "unable to parse c field (1)");
914 psz_eof = strchr( psz_parse, ' ' );
919 if( !strncmp( psz_parse, "IP4", 3 ) )
923 else if( !strncmp( psz_parse, "IP6", 3 ) )
931 psz_parse = psz_eof + 1;
935 msg_Warn( p_obj, "unable to parse c field (2)");
939 psz_eof = strchr( psz_parse, '/' );
947 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
949 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
951 asprintf( &psz_uri, "[%s]", psz_parse );
953 else psz_uri = strdup( psz_parse );
958 if( p_sdp->psz_media )
960 psz_parse = p_sdp->psz_media;
962 psz_eof = strchr( psz_parse, ' ' );
968 if( strncmp( psz_parse, "audio", 5 ) &&
969 strncmp( psz_parse, "video", 5 ) )
971 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
976 psz_parse = psz_eof + 1;
980 msg_Warn( p_obj, "unable to parse m field (1)");
985 psz_eof = strchr( psz_parse, ' ' );
991 /* FIXME : multiple port ! */
992 i_port = atoi( psz_parse );
994 if( i_port <= 0 || i_port >= 65536 )
996 msg_Warn( p_obj, "invalid transport port %i", i_port );
999 psz_parse = psz_eof + 1;
1003 msg_Warn( p_obj, "unable to parse m field (2)");
1004 FREENULL( psz_uri );
1005 return VLC_EGENERIC;
1008 psz_eof = strchr( psz_parse, ' ' );
1013 psz_proto = strdup( psz_parse );
1015 psz_parse = psz_eof + 1;
1016 p_sdp->i_media_type = atoi( psz_parse );
1021 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1022 p_sdp->i_media_type = 33;
1023 psz_proto = strdup( psz_parse );
1027 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1030 psz_proto = strdup( "rtp" );
1032 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1035 psz_proto = strdup( "udp" );
1038 /* FIXME: HTTP support */
1045 /* handle SSM case */
1046 psz_parse = GetAttribute( p_sdp, "source-filter" );
1047 char psz_source[258] = "";
1048 if (psz_parse != NULL)
1050 char psz_source_ip[256];
1052 if (sscanf (psz_parse, " incl IN IP%*c %*s %255s ", psz_source_ip) == 1)
1054 if (strchr (psz_source_ip, ':') != NULL)
1055 sprintf (psz_source, "[%s]", psz_source_ip);
1057 strcpy (psz_source, psz_source_ip);
1061 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1064 FREENULL( psz_uri );
1065 FREENULL( psz_proto );
1069 /***********************************************************************
1070 * ParseSDP : SDP parsing
1071 * *********************************************************************
1072 * Validate SDP and parse all fields
1073 ***********************************************************************/
1074 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1077 vlc_bool_t b_invalid = VLC_FALSE;
1078 vlc_bool_t b_end = VLC_FALSE;
1079 if( psz_sdp == NULL )
1084 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1086 msg_Warn( p_obj, "bad packet" );
1090 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1094 p_sdp->psz_sdp = strdup( psz_sdp );
1095 if( p_sdp->psz_sdp == NULL )
1101 p_sdp->psz_sessionname = NULL;
1102 p_sdp->psz_media = NULL;
1103 p_sdp->psz_connection = NULL;
1104 p_sdp->psz_uri = NULL;
1105 p_sdp->psz_address = NULL;
1106 p_sdp->psz_address_type= NULL;
1109 p_sdp->i_attributes = 0;
1110 p_sdp->pp_attributes = NULL;
1112 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1119 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1120 *psz_sdp == ' ' || *psz_sdp == '\t' )
1125 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1127 psz_eol = psz_sdp + strlen( psz_sdp );
1130 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1135 if( psz_eol <= psz_sdp )
1141 /* no space allowed between fields */
1142 if( psz_sdp[1] != '=' )
1144 msg_Warn( p_obj, "invalid packet" ) ;
1145 FreeSDP( p_sdp ); p_sdp = NULL;
1149 /* Now parse each line */
1150 switch( psz_sdp[0] )
1155 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1160 /* o field is <username> <session id> <version>
1161 * <network type> <address type> <address> */
1163 #define GET_FIELD( store ) \
1164 psz_eof = strchr( psz_parse, ' ' ); \
1167 *psz_eof=0; store = strdup( psz_parse ); \
1171 if( i_field != 5 ) \
1173 b_invalid = VLC_TRUE; break; \
1177 store = strdup( psz_parse ); \
1180 psz_parse = psz_eof + 1; i_field++;
1183 psz_parse = &psz_sdp[2];
1184 GET_FIELD( p_sdp->psz_username );
1185 GET_FIELD( psz_sess_id );
1187 p_sdp->i_session_id = atoll( psz_sess_id );
1189 FREENULL( psz_sess_id );
1191 GET_FIELD( psz_sess_id );
1192 FREENULL( psz_sess_id );
1194 GET_FIELD( p_sdp->psz_network_type );
1195 GET_FIELD( p_sdp->psz_address_type );
1196 GET_FIELD( p_sdp->psz_address );
1207 case( 'a' ): /* attribute */
1209 char *psz_eon = strchr( &psz_sdp[2], ':' );
1210 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1212 /* Attribute with value */
1217 p_attr->psz_field = strdup( &psz_sdp[2] );
1218 p_attr->psz_value = strdup( psz_eon );
1220 else /* Attribute without value */
1222 p_attr->psz_field = strdup( &psz_sdp[2] );
1223 p_attr->psz_value = NULL;
1226 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1230 case( 'm' ): /* Media announcement */
1232 /* If we have several medias, we pass the announcement to
1233 * LIVE.COM, so just count them */
1235 if( p_sdp->i_media == 1 )
1237 p_sdp->psz_media = strdup( &psz_sdp[2] );
1244 if( p_sdp->i_media > 1 )
1247 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1257 FreeSDP( p_sdp ); p_sdp = NULL;
1267 static int InitSocket( services_discovery_t *p_sd, const char *psz_address,
1270 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1274 net_StopSend( i_fd );
1275 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1276 p_sd->p_sys->i_fd, i_fd );
1280 return VLC_EGENERIC;
1284 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1286 int i_result, i_dstsize, n;
1287 unsigned char *psz_dst;
1290 d_stream.zalloc = (alloc_func)0;
1291 d_stream.zfree = (free_func)0;
1292 d_stream.opaque = (voidpf)0;
1294 i_result = inflateInit(&d_stream);
1295 if( i_result != Z_OK )
1297 printf( "inflateInit() failed. Result: %d\n", i_result );
1300 d_stream.next_in = (Bytef *)psz_src;
1301 d_stream.avail_in = i_len;
1309 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1310 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1311 d_stream.avail_out = 1000;
1313 i_result = inflate(&d_stream, Z_NO_FLUSH);
1314 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1316 printf( "Zlib decompression failed. Result: %d\n", i_result );
1320 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1321 ( i_result != Z_STREAM_END ) );
1323 i_dstsize = d_stream.total_out;
1324 inflateEnd( &d_stream );
1326 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1333 static void FreeSDP( sdp_t *p_sdp )
1336 FREENULL( p_sdp->psz_sdp );
1337 FREENULL( p_sdp->psz_sessionname );
1338 FREENULL( p_sdp->psz_connection );
1339 FREENULL( p_sdp->psz_media );
1340 FREENULL( p_sdp->psz_uri );
1341 FREENULL( p_sdp->psz_username );
1342 FREENULL( p_sdp->psz_network_type );
1344 FREENULL( p_sdp->psz_address );
1345 FREENULL( p_sdp->psz_address_type );
1347 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1349 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1350 FREENULL( p_sdp->pp_attributes[i]->psz_field );
1351 FREENULL( p_sdp->pp_attributes[i]->psz_value );
1352 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1358 static int RemoveAnnounce( services_discovery_t *p_sd,
1359 sap_announce_t *p_announce )
1363 if( p_announce->p_sdp )
1365 FreeSDP( p_announce->p_sdp );
1366 p_announce->p_sdp = NULL;
1369 if( p_announce->i_input_id > -1 )
1370 playlist_LockDeleteAllFromInput( pl_Get(p_sd), p_announce->i_input_id );
1372 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1374 if( p_sd->p_sys->pp_announces[i] == p_announce )
1376 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1387 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1389 /* A session is identified by
1390 * username, session_id, network type, address type and address */
1391 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1392 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1393 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1394 p_sdp1->psz_address && p_sdp2->psz_address )
1396 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1397 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1398 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1399 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1400 p_sdp1->i_session_id == p_sdp2->i_session_id )