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 );
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 );
275 /*****************************************************************************
276 * Open: initialize and create stuff
277 *****************************************************************************/
278 static int Open( vlc_object_t *p_this )
280 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
281 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
282 malloc( sizeof( services_discovery_sys_t ) );
284 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
292 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
293 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
296 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
302 /* Cache sap_timeshift value */
303 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
304 ? VLC_TRUE : VLC_FALSE;
306 /* Create our playlist node */
309 playlist_NodesPairCreate( pl_Get( p_sd ), _("SAP sessions"),
310 &p_sys->p_node_cat, &p_sys->p_node_one,
313 p_sys->i_announces = 0;
314 p_sys->pp_announces = NULL;
319 /*****************************************************************************
320 * OpenDemux: initialize and create stuff
321 *****************************************************************************/
322 static int OpenDemux( vlc_object_t *p_this )
324 demux_t *p_demux = (demux_t *)p_this;
326 int i_max_sdp = 1024;
328 char *psz_sdp = NULL;
331 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
333 /* We want livedotcom module to parse this SDP file */
340 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
342 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
343 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
344 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
350 psz_sdp = (char *)malloc( i_max_sdp );
351 if( !psz_sdp ) return VLC_EGENERIC;
353 /* Gather the complete sdp file */
356 int i_read = stream_Read( p_demux->s,
357 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
361 msg_Err( p_demux, "failed to read SDP" );
367 if( i_read < i_max_sdp - i_sdp - 1 )
369 psz_sdp[i_sdp] = '\0';
374 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
377 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
381 msg_Warn( p_demux, "invalid SDP");
385 if( p_sdp->i_media > 1 )
390 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
392 p_sdp->psz_uri = NULL;
394 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
395 p_sdp->i_media_type != 14 )
398 if( p_sdp->psz_uri == NULL ) goto error;
400 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
401 p_demux->p_sys->p_sdp = p_sdp;
402 p_demux->pf_control = Control;
403 p_demux->pf_demux = Demux;
410 if( p_sdp ) FreeSDP( p_sdp ); p_sdp = NULL;
411 stream_Seek( p_demux->s, 0 );
415 /*****************************************************************************
417 *****************************************************************************/
418 static void Close( vlc_object_t *p_this )
420 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
421 services_discovery_sys_t *p_sys = p_sd->p_sys;
425 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
427 net_Close( p_sys->pi_fd[i] );
429 FREENULL( p_sys->pi_fd );
432 if( config_GetInt( p_sd, "sap-cache" ) )
438 for( i = p_sys->i_announces - 1; i>= 0; i-- )
440 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
442 FREENULL( p_sys->pp_announces );
444 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_cat, VLC_TRUE,
446 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_one, VLC_TRUE,
452 /*****************************************************************************
453 * CloseDemux: Close the demuxer
454 *****************************************************************************/
455 static void CloseDemux( vlc_object_t *p_this )
457 demux_t *p_demux = (demux_t *)p_this;
460 if( p_demux->p_sys->p_sdp ) { FreeSDP( p_demux->p_sys->p_sdp ); p_demux->p_sys->p_sdp = NULL; }
461 free( p_demux->p_sys );
465 /*****************************************************************************
466 * Run: main SAP thread
467 *****************************************************************************
468 * Listens to SAP packets, and sends them to packet_handle
469 *****************************************************************************/
470 #define MAX_SAP_BUFFER 5000
472 static void Run( services_discovery_t *p_sd )
477 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
478 * DNS queries, even if the DNS server returns an error with milliseconds.
479 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
480 * Winsock 1.1 from Windows 95, if not Windows 3.1.
481 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
482 * we have to open sockets in Run() rather than Open(). */
483 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
485 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
486 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
487 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
488 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
490 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
492 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
495 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
497 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
498 InitSocket( p_sd, psz_address, SAP_PORT );
502 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
503 if( psz_addr && *psz_addr )
505 InitSocket( p_sd, psz_addr, SAP_PORT );
509 if( p_sd->p_sys->i_fd == 0 )
511 msg_Err( p_sd, "unable to listen on any address" );
515 /* read SAP packets */
516 while( !p_sd->b_die )
519 uint8_t p_buffer[MAX_SAP_BUFFER+1];
521 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
522 p_sd->p_sys->i_fd, p_buffer,
523 MAX_SAP_BUFFER, 500000 );
525 /* Check for items that need deletion */
526 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
528 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
530 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
532 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i] );
536 /* Minimum length is > 6 */
541 msg_Warn( p_sd, "socket read error" );
546 p_buffer[i_read] = '\0';
548 /* Parse the packet */
549 ParseSAP( p_sd, p_buffer, i_read );
553 /**********************************************************************
554 * Demux: reads and demuxes data packets
555 * Return -1 if error, 0 if EOF, 1 else
556 **********************************************************************/
557 static int Demux( demux_t *p_demux )
559 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
560 input_thread_t *p_input;
561 input_item_t *p_parent_input;
563 playlist_t *p_playlist = pl_Yield( p_demux );
564 p_input = (input_thread_t *)vlc_object_find( p_demux, VLC_OBJECT_INPUT,
569 msg_Err( p_demux, "parent input could not be found" );
573 p_parent_input = p_input->input.p_item;
575 vlc_mutex_lock( &p_parent_input->lock );
576 FREENULL( p_parent_input->psz_uri );
577 p_parent_input->psz_uri = strdup( p_sdp->psz_uri );
578 FREENULL( p_parent_input->psz_name );
579 p_parent_input->psz_name = strdup( EnsureUTF8( p_sdp->psz_sessionname ) );
580 p_parent_input->i_type = ITEM_TYPE_NET;
582 if( p_playlist->status.p_item &&
583 p_playlist->status.p_item->p_input == p_parent_input )
585 playlist_Control( p_playlist, PLAYLIST_VIEWPLAY,
586 p_playlist->status.p_node, p_playlist->status.p_item );
589 vlc_mutex_unlock( &p_parent_input->lock );
590 vlc_object_release( p_input );
591 vlc_object_release( p_playlist );
596 static int Control( demux_t *p_demux, int i_query, va_list args )
601 /**************************************************************
603 **************************************************************/
605 /* i_read is at least > 6 */
606 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
608 int i_version, i_address_type, i_hash, i;
609 char *psz_sdp, *psz_foo, *psz_initial_sdp;
610 uint8_t *p_decompressed_buffer = NULL;
612 vlc_bool_t b_compressed;
613 vlc_bool_t b_need_delete = VLC_FALSE;
615 /* First, check the sap announce is correct */
616 i_version = p_buffer[0] >> 5;
619 msg_Dbg( p_sd, "strange sap version %d found", i_version );
622 i_address_type = p_buffer[0] & 0x10;
624 if( (p_buffer[0] & 0x08) != 0 )
626 msg_Dbg( p_sd, "reserved bit incorrectly set" );
630 if( (p_buffer[0] & 0x04) != 0 )
632 msg_Dbg( p_sd, "session deletion packet" );
633 b_need_delete = VLC_TRUE;
636 if( p_buffer[0] & 0x02 )
638 msg_Dbg( p_sd, "encrypted packet, unsupported" );
642 b_compressed = p_buffer[0] & 0x01;
644 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
646 if( p_sd->p_sys->b_strict && i_hash == 0 )
648 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
652 psz_sdp = (char *)p_buffer + 4;
653 psz_initial_sdp = psz_sdp;
655 if( i_address_type == 0 ) /* ipv4 source address */
660 msg_Warn( p_sd, "too short SAP packet" );
664 else /* ipv6 source address */
669 msg_Warn( p_sd, "too short SAP packet" );
677 int i_decompressed_size;
679 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
680 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
681 if( i_decompressed_size > 0 )
683 psz_sdp = (char *)p_decompressed_buffer;
684 realloc( p_decompressed_buffer, i_decompressed_size++ );
685 psz_sdp[i_decompressed_size] = '\0';
689 msg_Warn( p_sd, "decompression of sap packet failed" );
693 msg_Warn( p_sd, "ignoring compressed sap packet" );
698 /* Add the size of authentification info */
699 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
701 msg_Warn( p_sd, "too short SAP packet\n");
704 psz_sdp += p_buffer[1];
707 /* Skip payload type */
708 /* Handle announces without \0 between SAP and SDP */
709 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
711 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
713 msg_Warn( p_sd, "empty SDP ?");
718 if( *psz_sdp == '\0' )
722 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
724 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
726 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
728 msg_Warn( p_sd, "package without content" );
733 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
740 /* Decide whether we should add a playlist item for this SDP */
741 /* Parse connection information (c= & m= ) */
742 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
744 p_sdp->psz_uri = NULL;
747 /* Multi-media or no-parse -> pass to LIVE.COM */
748 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
749 p_sdp->i_media_type != 32 &&
750 p_sdp->i_media_type != 33) ||
751 p_sd->p_sys->b_parse == VLC_FALSE )
753 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
754 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
757 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
759 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
762 /* FIXME: we create a new announce each time the sdp changes */
763 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
767 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
771 p_sd->p_sys->pp_announces[i]->i_last = mdate();
773 FreeSDP( p_sdp ); p_sdp = NULL;
778 if( p_sdp->i_media > 1 )
780 msg_Dbg( p_sd, "passing to liveMedia" );
783 CreateAnnounce( p_sd, i_hash, p_sdp );
785 FREENULL( p_decompressed_buffer );
789 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
792 input_item_t *p_input;
793 playlist_item_t *p_item, *p_child;
795 sap_announce_t *p_sap = (sap_announce_t *)malloc(
796 sizeof(sap_announce_t ) );
797 services_discovery_sys_t *p_sys;
803 EnsureUTF8( p_sdp->psz_sessionname );
804 p_sap->i_last = mdate();
805 p_sap->i_hash = i_hash;
806 p_sap->p_sdp = p_sdp;
808 /* Create the actual playlist item here */
809 p_input = input_ItemNewWithType( VLC_OBJECT(p_sd),
810 p_sap->p_sdp->psz_uri,
811 p_sdp->psz_sessionname,
812 0, NULL, -1, ITEM_TYPE_NET );
813 p_sap->i_input_id = p_input->i_id;
820 if( p_sys->b_timeshift )
821 input_ItemAddOption( p_input, ":access-filter=timeshift" );
823 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
824 if( psz_value != NULL )
826 input_ItemAddInfo( p_input, _("Session"),_("Tool"), psz_value );
828 if( strcmp( p_sdp->psz_username, "-" ) )
830 input_ItemAddInfo( p_input, _("Session"),
831 _("User"), p_sdp->psz_username );
835 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
836 if( psz_value == NULL )
837 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
839 if( psz_value != NULL )
841 EnsureUTF8( psz_value );
843 p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
845 if( p_child == NULL )
847 p_child = playlist_NodeCreate( pl_Get( p_sd ), psz_value,
849 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
854 p_child = p_sys->p_node_cat;
857 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input, p_child,
858 PLAYLIST_APPEND, PLAYLIST_END );
859 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
860 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
861 p_sap->i_item_id_cat = p_item->i_id;
863 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input,
864 p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
865 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
866 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
867 p_sap->i_item_id_one = p_item->i_id;
869 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
874 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
878 for( i = 0 ; i< p_sdp->i_attributes; i++ )
880 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
881 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
883 return p_sdp->pp_attributes[i]->psz_value;
890 /* Fill p_sdp->psz_uri */
891 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
893 char *psz_eof = NULL;
894 char *psz_parse = NULL;
895 char *psz_uri = NULL;
896 char *psz_proto = NULL;
897 char psz_source[256];
901 if( p_sdp->psz_connection )
903 psz_parse = p_sdp->psz_connection;
905 psz_eof = strchr( psz_parse, ' ' );
910 psz_parse = psz_eof + 1;
914 msg_Warn( p_obj, "unable to parse c field (1)");
918 psz_eof = strchr( psz_parse, ' ' );
923 if( !strncmp( psz_parse, "IP4", 3 ) )
927 else if( !strncmp( psz_parse, "IP6", 3 ) )
935 psz_parse = psz_eof + 1;
939 msg_Warn( p_obj, "unable to parse c field (2)");
943 psz_eof = strchr( psz_parse, '/' );
951 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
953 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
955 asprintf( &psz_uri, "[%s]", psz_parse );
957 else psz_uri = strdup( psz_parse );
962 if( p_sdp->psz_media )
964 psz_parse = p_sdp->psz_media;
966 psz_eof = strchr( psz_parse, ' ' );
972 if( strncmp( psz_parse, "audio", 5 ) &&
973 strncmp( psz_parse, "video", 5 ) )
975 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
980 psz_parse = psz_eof + 1;
984 msg_Warn( p_obj, "unable to parse m field (1)");
989 psz_eof = strchr( psz_parse, ' ' );
995 /* FIXME : multiple port ! */
996 i_port = atoi( psz_parse );
998 if( i_port <= 0 || i_port >= 65536 )
1000 msg_Warn( p_obj, "invalid transport port %i", i_port );
1003 psz_parse = psz_eof + 1;
1007 msg_Warn( p_obj, "unable to parse m field (2)");
1008 FREENULL( psz_uri );
1009 return VLC_EGENERIC;
1012 psz_eof = strchr( psz_parse, ' ' );
1017 psz_proto = strdup( psz_parse );
1019 psz_parse = psz_eof + 1;
1020 p_sdp->i_media_type = atoi( psz_parse );
1025 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1026 p_sdp->i_media_type = 33;
1027 psz_proto = strdup( psz_parse );
1031 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1034 psz_proto = strdup( "rtp" );
1036 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1039 psz_proto = strdup( "udp" );
1042 /* FIXME: HTTP support */
1049 /* handle SSM case */
1050 psz_parse = GetAttribute( p_sdp, "source-filter" );
1051 psz_source[0] = '\0';
1053 if( psz_parse ) sscanf( psz_parse, " incl IN IP%*s %*s %255s ", psz_source);
1055 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1058 FREENULL( psz_uri );
1059 FREENULL( psz_proto );
1063 /***********************************************************************
1064 * ParseSDP : SDP parsing
1065 * *********************************************************************
1066 * Validate SDP and parse all fields
1067 ***********************************************************************/
1068 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1071 vlc_bool_t b_invalid = VLC_FALSE;
1072 vlc_bool_t b_end = VLC_FALSE;
1073 if( psz_sdp == NULL )
1078 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1080 msg_Warn( p_obj, "bad packet" );
1084 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1088 p_sdp->psz_sdp = strdup( psz_sdp );
1089 if( p_sdp->psz_sdp == NULL )
1095 p_sdp->psz_sessionname = NULL;
1096 p_sdp->psz_media = NULL;
1097 p_sdp->psz_connection = NULL;
1098 p_sdp->psz_uri = NULL;
1099 p_sdp->psz_address = NULL;
1100 p_sdp->psz_address_type= NULL;
1103 p_sdp->i_attributes = 0;
1104 p_sdp->pp_attributes = NULL;
1106 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1113 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1114 *psz_sdp == ' ' || *psz_sdp == '\t' )
1119 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1121 psz_eol = psz_sdp + strlen( psz_sdp );
1124 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1129 if( psz_eol <= psz_sdp )
1135 /* no space allowed between fields */
1136 if( psz_sdp[1] != '=' )
1138 msg_Warn( p_obj, "invalid packet" ) ;
1139 FreeSDP( p_sdp ); p_sdp = NULL;
1143 /* Now parse each line */
1144 switch( psz_sdp[0] )
1149 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1154 /* o field is <username> <session id> <version>
1155 * <network type> <address type> <address> */
1157 #define GET_FIELD( store ) \
1158 psz_eof = strchr( psz_parse, ' ' ); \
1161 *psz_eof=0; store = strdup( psz_parse ); \
1165 if( i_field != 5 ) \
1167 b_invalid = VLC_TRUE; break; \
1171 store = strdup( psz_parse ); \
1174 psz_parse = psz_eof + 1; i_field++;
1177 psz_parse = &psz_sdp[2];
1178 GET_FIELD( p_sdp->psz_username );
1179 GET_FIELD( psz_sess_id );
1181 p_sdp->i_session_id = atoll( psz_sess_id );
1183 FREENULL( psz_sess_id );
1185 GET_FIELD( psz_sess_id );
1186 FREENULL( psz_sess_id );
1188 GET_FIELD( p_sdp->psz_network_type );
1189 GET_FIELD( p_sdp->psz_address_type );
1190 GET_FIELD( p_sdp->psz_address );
1201 case( 'a' ): /* attribute */
1203 char *psz_eon = strchr( &psz_sdp[2], ':' );
1204 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1206 /* Attribute with value */
1211 p_attr->psz_field = strdup( &psz_sdp[2] );
1212 p_attr->psz_value = strdup( psz_eon );
1214 else /* Attribute without value */
1216 p_attr->psz_field = strdup( &psz_sdp[2] );
1217 p_attr->psz_value = NULL;
1220 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1224 case( 'm' ): /* Media announcement */
1226 /* If we have several medias, we pass the announcement to
1227 * LIVE.COM, so just count them */
1229 if( p_sdp->i_media == 1 )
1231 p_sdp->psz_media = strdup( &psz_sdp[2] );
1238 if( p_sdp->i_media > 1 )
1241 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1251 FreeSDP( p_sdp ); p_sdp = NULL;
1261 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1264 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1268 net_StopSend( i_fd );
1269 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1270 p_sd->p_sys->i_fd, i_fd );
1274 return VLC_EGENERIC;
1278 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1280 int i_result, i_dstsize, n;
1281 unsigned char *psz_dst;
1284 d_stream.zalloc = (alloc_func)0;
1285 d_stream.zfree = (free_func)0;
1286 d_stream.opaque = (voidpf)0;
1288 i_result = inflateInit(&d_stream);
1289 if( i_result != Z_OK )
1291 printf( "inflateInit() failed. Result: %d\n", i_result );
1294 d_stream.next_in = (Bytef *)psz_src;
1295 d_stream.avail_in = i_len;
1303 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1304 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1305 d_stream.avail_out = 1000;
1307 i_result = inflate(&d_stream, Z_NO_FLUSH);
1308 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1310 printf( "Zlib decompression failed. Result: %d\n", i_result );
1314 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1315 ( i_result != Z_STREAM_END ) );
1317 i_dstsize = d_stream.total_out;
1318 inflateEnd( &d_stream );
1320 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1327 static void FreeSDP( sdp_t *p_sdp )
1330 FREENULL( p_sdp->psz_sdp );
1331 FREENULL( p_sdp->psz_sessionname );
1332 FREENULL( p_sdp->psz_connection );
1333 FREENULL( p_sdp->psz_media );
1334 FREENULL( p_sdp->psz_uri );
1335 FREENULL( p_sdp->psz_username );
1336 FREENULL( p_sdp->psz_network_type );
1338 FREENULL( p_sdp->psz_address );
1339 FREENULL( p_sdp->psz_address_type );
1341 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1343 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1344 FREENULL( p_sdp->pp_attributes[i]->psz_field );
1345 FREENULL( p_sdp->pp_attributes[i]->psz_value );
1346 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1352 static int RemoveAnnounce( services_discovery_t *p_sd,
1353 sap_announce_t *p_announce )
1357 if( p_announce->p_sdp )
1359 FreeSDP( p_announce->p_sdp );
1360 p_announce->p_sdp = NULL;
1363 if( p_announce->i_input_id > -1 )
1364 playlist_LockDeleteAllFromInput( pl_Get(p_sd), p_announce->i_input_id );
1366 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1368 if( p_sd->p_sys->pp_announces[i] == p_announce )
1370 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1381 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1383 /* A session is identified by
1384 * username, session_id, network type, address type and address */
1385 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1386 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1387 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1388 p_sdp1->psz_address && p_sdp2->psz_address )
1390 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1391 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1392 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1393 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1394 p_sdp1->i_session_id == p_sdp2->i_session_id )
1410 static void CacheLoad( services_discovery_t *p_sd )
1412 msg_Warn( p_sd, "cache not implemented") ;
1415 static void CacheSave( services_discovery_t *p_sd )
1417 msg_Warn( p_sd, "cache not implemented") ;