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 );
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 */
307 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
310 if( !p_sys->p_playlist )
312 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
316 playlist_NodesPairCreate( p_sys->p_playlist, _("SAP sessions"),
317 &p_sys->p_node_cat, &p_sys->p_node_one,
320 p_sys->i_announces = 0;
321 p_sys->pp_announces = NULL;
326 /*****************************************************************************
327 * OpenDemux: initialize and create stuff
328 *****************************************************************************/
329 static int OpenDemux( vlc_object_t *p_this )
331 demux_t *p_demux = (demux_t *)p_this;
333 int i_max_sdp = 1024;
335 char *psz_sdp = NULL;
338 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
340 /* We want livedotcom module to parse this SDP file */
347 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
349 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
350 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
351 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
357 psz_sdp = (char *)malloc( i_max_sdp );
358 if( !psz_sdp ) return VLC_EGENERIC;
360 /* Gather the complete sdp file */
363 int i_read = stream_Read( p_demux->s,
364 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
368 msg_Err( p_demux, "failed to read SDP" );
374 if( i_read < i_max_sdp - i_sdp - 1 )
376 psz_sdp[i_sdp] = '\0';
381 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
384 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
388 msg_Warn( p_demux, "invalid SDP");
392 if( p_sdp->i_media > 1 )
397 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
399 p_sdp->psz_uri = NULL;
401 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
402 p_sdp->i_media_type != 14 )
405 if( p_sdp->psz_uri == NULL ) goto error;
407 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
408 p_demux->p_sys->p_sdp = p_sdp;
409 p_demux->pf_control = Control;
410 p_demux->pf_demux = Demux;
417 if( p_sdp ) FreeSDP( p_sdp ); p_sdp = NULL;
418 stream_Seek( p_demux->s, 0 );
422 /*****************************************************************************
424 *****************************************************************************/
425 static void Close( vlc_object_t *p_this )
427 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
428 services_discovery_sys_t *p_sys = p_sd->p_sys;
432 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
434 net_Close( p_sys->pi_fd[i] );
436 FREENULL( p_sys->pi_fd );
439 if( config_GetInt( p_sd, "sap-cache" ) )
445 for( i = p_sys->i_announces - 1; i>= 0; i-- )
447 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
449 FREENULL( p_sys->pp_announces );
451 if( p_sys->p_playlist )
453 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_cat, VLC_TRUE,
455 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node_one, VLC_TRUE,
457 vlc_object_release( p_sys->p_playlist );
463 /*****************************************************************************
464 * CloseDemux: Close the demuxer
465 *****************************************************************************/
466 static void CloseDemux( vlc_object_t *p_this )
468 demux_t *p_demux = (demux_t *)p_this;
471 if( p_demux->p_sys->p_sdp ) { FreeSDP( p_demux->p_sys->p_sdp ); p_demux->p_sys->p_sdp = NULL; }
472 free( p_demux->p_sys );
476 /*****************************************************************************
477 * Run: main SAP thread
478 *****************************************************************************
479 * Listens to SAP packets, and sends them to packet_handle
480 *****************************************************************************/
481 #define MAX_SAP_BUFFER 5000
483 static void Run( services_discovery_t *p_sd )
488 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
489 * DNS queries, even if the DNS server returns an error with milliseconds.
490 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
491 * Winsock 1.1 from Windows 95, if not Windows 3.1.
492 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
493 * we have to open sockets in Run() rather than Open(). */
494 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
496 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
497 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
498 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
499 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
501 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
503 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
506 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
508 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
509 InitSocket( p_sd, psz_address, SAP_PORT );
513 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
514 if( psz_addr && *psz_addr )
516 InitSocket( p_sd, psz_addr, SAP_PORT );
520 if( p_sd->p_sys->i_fd == 0 )
522 msg_Err( p_sd, "unable to listen on any address" );
526 /* read SAP packets */
527 while( !p_sd->b_die )
530 uint8_t p_buffer[MAX_SAP_BUFFER+1];
532 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
533 p_sd->p_sys->i_fd, p_buffer,
534 MAX_SAP_BUFFER, 500000 );
536 /* Check for items that need deletion */
537 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
539 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
541 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
543 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i] );
547 /* Minimum length is > 6 */
552 msg_Warn( p_sd, "socket read error" );
557 p_buffer[i_read] = '\0';
559 /* Parse the packet */
560 ParseSAP( p_sd, p_buffer, i_read );
564 /**********************************************************************
565 * Demux: reads and demuxes data packets
566 * Return -1 if error, 0 if EOF, 1 else
567 **********************************************************************/
568 static int Demux( demux_t *p_demux )
570 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
571 playlist_t *p_playlist;
572 input_thread_t *p_input;
573 input_item_t *p_parent_input;
575 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
579 msg_Err( p_demux, "playlist could not be found" );
583 p_input = (input_thread_t *)vlc_object_find( p_demux, VLC_OBJECT_INPUT,
587 msg_Err( p_demux, "parent input could not be found" );
591 p_parent_input = p_input->input.p_item;
593 vlc_mutex_lock( &p_parent_input->lock );
594 FREENULL( p_parent_input->psz_uri );
595 p_parent_input->psz_uri = strdup( p_sdp->psz_uri );
596 FREENULL( p_parent_input->psz_name );
597 p_parent_input->psz_name = strdup( EnsureUTF8( p_sdp->psz_sessionname ) );
598 p_parent_input->i_type = ITEM_TYPE_NET;
600 if( p_playlist->status.p_item &&
601 p_playlist->status.p_item->p_input == p_parent_input )
603 playlist_Control( p_playlist, PLAYLIST_VIEWPLAY,
604 p_playlist->status.p_node, p_playlist->status.p_item );
607 vlc_mutex_unlock( &p_parent_input->lock );
608 vlc_object_release( p_input );
609 vlc_object_release( p_playlist );
614 static int Control( demux_t *p_demux, int i_query, va_list args )
619 /**************************************************************
621 **************************************************************/
623 /* i_read is at least > 6 */
624 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
626 int i_version, i_address_type, i_hash, i;
627 char *psz_sdp, *psz_foo, *psz_initial_sdp;
628 uint8_t *p_decompressed_buffer = NULL;
630 vlc_bool_t b_compressed;
631 vlc_bool_t b_need_delete = VLC_FALSE;
633 /* First, check the sap announce is correct */
634 i_version = p_buffer[0] >> 5;
637 msg_Dbg( p_sd, "strange sap version %d found", i_version );
640 i_address_type = p_buffer[0] & 0x10;
642 if( (p_buffer[0] & 0x08) != 0 )
644 msg_Dbg( p_sd, "reserved bit incorrectly set" );
648 if( (p_buffer[0] & 0x04) != 0 )
650 msg_Dbg( p_sd, "session deletion packet" );
651 b_need_delete = VLC_TRUE;
654 if( p_buffer[0] & 0x02 )
656 msg_Dbg( p_sd, "encrypted packet, unsupported" );
660 b_compressed = p_buffer[0] & 0x01;
662 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
664 if( p_sd->p_sys->b_strict && i_hash == 0 )
666 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
670 psz_sdp = (char *)p_buffer + 4;
671 psz_initial_sdp = psz_sdp;
673 if( i_address_type == 0 ) /* ipv4 source address */
678 msg_Warn( p_sd, "too short SAP packet" );
682 else /* ipv6 source address */
687 msg_Warn( p_sd, "too short SAP packet" );
695 int i_decompressed_size;
697 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
698 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
699 if( i_decompressed_size > 0 )
701 psz_sdp = (char *)p_decompressed_buffer;
702 realloc( p_decompressed_buffer, i_decompressed_size++ );
703 psz_sdp[i_decompressed_size] = '\0';
707 msg_Warn( p_sd, "decompression of sap packet failed" );
711 msg_Warn( p_sd, "ignoring compressed sap packet" );
716 /* Add the size of authentification info */
717 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
719 msg_Warn( p_sd, "too short SAP packet\n");
722 psz_sdp += p_buffer[1];
725 /* Skip payload type */
726 /* Handle announces without \0 between SAP and SDP */
727 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
729 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
731 msg_Warn( p_sd, "empty SDP ?");
736 if( *psz_sdp == '\0' )
740 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
742 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
744 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
746 msg_Warn( p_sd, "package without content" );
751 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
758 /* Decide whether we should add a playlist item for this SDP */
759 /* Parse connection information (c= & m= ) */
760 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
762 p_sdp->psz_uri = NULL;
765 /* Multi-media or no-parse -> pass to LIVE.COM */
766 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
767 p_sdp->i_media_type != 32 &&
768 p_sdp->i_media_type != 33) ||
769 p_sd->p_sys->b_parse == VLC_FALSE )
771 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
772 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
775 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
777 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
780 /* FIXME: we create a new announce each time the sdp changes */
781 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
785 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
789 p_sd->p_sys->pp_announces[i]->i_last = mdate();
791 FreeSDP( p_sdp ); p_sdp = NULL;
796 if( p_sdp->i_media > 1 )
798 msg_Dbg( p_sd, "passing to liveMedia" );
801 CreateAnnounce( p_sd, i_hash, p_sdp );
803 FREENULL( p_decompressed_buffer );
807 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
810 input_item_t *p_input;
811 playlist_item_t *p_item, *p_child;
813 sap_announce_t *p_sap = (sap_announce_t *)malloc(
814 sizeof(sap_announce_t ) );
815 services_discovery_sys_t *p_sys;
821 EnsureUTF8( p_sdp->psz_sessionname );
822 p_sap->i_last = mdate();
823 p_sap->i_hash = i_hash;
824 p_sap->p_sdp = p_sdp;
826 /* Create the actual playlist item here */
827 p_input = input_ItemNewWithType( VLC_OBJECT(p_sd),
828 p_sap->p_sdp->psz_uri,
829 p_sdp->psz_sessionname,
830 0, NULL, -1, ITEM_TYPE_NET );
831 p_sap->i_input_id = p_input->i_id;
838 if( p_sys->b_timeshift )
839 vlc_input_item_AddOption( p_input, ":access-filter=timeshift" );
841 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
842 if( psz_value != NULL )
844 vlc_input_item_AddInfo( p_input, _("Session"),_("Tool"), psz_value );
846 if( strcmp( p_sdp->psz_username, "-" ) )
848 vlc_input_item_AddInfo( p_input, _("Session"),
849 _("User"), p_sdp->psz_username );
853 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
854 if( psz_value == NULL )
855 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
857 if( psz_value != NULL )
859 EnsureUTF8( psz_value );
861 p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
863 if( p_child == NULL )
865 p_child = playlist_NodeCreate( p_sys->p_playlist, psz_value,
867 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
872 p_child = p_sys->p_node_cat;
875 p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input, p_child,
876 PLAYLIST_APPEND, PLAYLIST_END );
877 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
878 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
879 p_sap->i_item_id_cat = p_item->i_id;
881 p_item = playlist_NodeAddInput( p_sys->p_playlist, p_input,
882 p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
883 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
884 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
885 p_sap->i_item_id_one = p_item->i_id;
887 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
892 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
896 for( i = 0 ; i< p_sdp->i_attributes; i++ )
898 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
899 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
901 return p_sdp->pp_attributes[i]->psz_value;
908 /* Fill p_sdp->psz_uri */
909 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
911 char *psz_eof = NULL;
912 char *psz_parse = NULL;
913 char *psz_uri = NULL;
914 char *psz_proto = NULL;
915 char psz_source[256];
919 if( p_sdp->psz_connection )
921 psz_parse = p_sdp->psz_connection;
923 psz_eof = strchr( psz_parse, ' ' );
928 psz_parse = psz_eof + 1;
932 msg_Warn( p_obj, "unable to parse c field (1)");
936 psz_eof = strchr( psz_parse, ' ' );
941 if( !strncmp( psz_parse, "IP4", 3 ) )
945 else if( !strncmp( psz_parse, "IP6", 3 ) )
953 psz_parse = psz_eof + 1;
957 msg_Warn( p_obj, "unable to parse c field (2)");
961 psz_eof = strchr( psz_parse, '/' );
969 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
971 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
973 asprintf( &psz_uri, "[%s]", psz_parse );
975 else psz_uri = strdup( psz_parse );
980 if( p_sdp->psz_media )
982 psz_parse = p_sdp->psz_media;
984 psz_eof = strchr( psz_parse, ' ' );
990 if( strncmp( psz_parse, "audio", 5 ) &&
991 strncmp( psz_parse, "video", 5 ) )
993 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
998 psz_parse = psz_eof + 1;
1002 msg_Warn( p_obj, "unable to parse m field (1)");
1003 FREENULL( psz_uri );
1004 return VLC_EGENERIC;
1007 psz_eof = strchr( psz_parse, ' ' );
1013 /* FIXME : multiple port ! */
1014 i_port = atoi( psz_parse );
1016 if( i_port <= 0 || i_port >= 65536 )
1018 msg_Warn( p_obj, "invalid transport port %i", i_port );
1021 psz_parse = psz_eof + 1;
1025 msg_Warn( p_obj, "unable to parse m field (2)");
1026 FREENULL( psz_uri );
1027 return VLC_EGENERIC;
1030 psz_eof = strchr( psz_parse, ' ' );
1035 psz_proto = strdup( psz_parse );
1037 psz_parse = psz_eof + 1;
1038 p_sdp->i_media_type = atoi( psz_parse );
1043 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1044 p_sdp->i_media_type = 33;
1045 psz_proto = strdup( psz_parse );
1049 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1052 psz_proto = strdup( "rtp" );
1054 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1057 psz_proto = strdup( "udp" );
1060 /* FIXME: HTTP support */
1067 /* handle SSM case */
1068 psz_parse = GetAttribute( p_sdp, "source-filter" );
1069 psz_source[0] = '\0';
1071 if( psz_parse ) sscanf( psz_parse, " incl IN IP%*s %*s %255s ", psz_source);
1073 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1076 FREENULL( psz_uri );
1077 FREENULL( psz_proto );
1081 /***********************************************************************
1082 * ParseSDP : SDP parsing
1083 * *********************************************************************
1084 * Validate SDP and parse all fields
1085 ***********************************************************************/
1086 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1089 vlc_bool_t b_invalid = VLC_FALSE;
1090 vlc_bool_t b_end = VLC_FALSE;
1091 if( psz_sdp == NULL )
1096 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1098 msg_Warn( p_obj, "bad packet" );
1102 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1106 p_sdp->psz_sdp = strdup( psz_sdp );
1107 if( p_sdp->psz_sdp == NULL )
1113 p_sdp->psz_sessionname = NULL;
1114 p_sdp->psz_media = NULL;
1115 p_sdp->psz_connection = NULL;
1116 p_sdp->psz_uri = NULL;
1117 p_sdp->psz_address = NULL;
1118 p_sdp->psz_address_type= NULL;
1121 p_sdp->i_attributes = 0;
1122 p_sdp->pp_attributes = NULL;
1124 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1131 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1132 *psz_sdp == ' ' || *psz_sdp == '\t' )
1137 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1139 psz_eol = psz_sdp + strlen( psz_sdp );
1142 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1147 if( psz_eol <= psz_sdp )
1153 /* no space allowed between fields */
1154 if( psz_sdp[1] != '=' )
1156 msg_Warn( p_obj, "invalid packet" ) ;
1157 FreeSDP( p_sdp ); p_sdp = NULL;
1161 /* Now parse each line */
1162 switch( psz_sdp[0] )
1167 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1172 /* o field is <username> <session id> <version>
1173 * <network type> <address type> <address> */
1175 #define GET_FIELD( store ) \
1176 psz_eof = strchr( psz_parse, ' ' ); \
1179 *psz_eof=0; store = strdup( psz_parse ); \
1183 if( i_field != 5 ) \
1185 b_invalid = VLC_TRUE; break; \
1189 store = strdup( psz_parse ); \
1192 psz_parse = psz_eof + 1; i_field++;
1195 psz_parse = &psz_sdp[2];
1196 GET_FIELD( p_sdp->psz_username );
1197 GET_FIELD( psz_sess_id );
1199 p_sdp->i_session_id = atoll( psz_sess_id );
1201 FREENULL( psz_sess_id );
1203 GET_FIELD( psz_sess_id );
1204 FREENULL( psz_sess_id );
1206 GET_FIELD( p_sdp->psz_network_type );
1207 GET_FIELD( p_sdp->psz_address_type );
1208 GET_FIELD( p_sdp->psz_address );
1219 case( 'a' ): /* attribute */
1221 char *psz_eon = strchr( &psz_sdp[2], ':' );
1222 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1224 /* Attribute with value */
1229 p_attr->psz_field = strdup( &psz_sdp[2] );
1230 p_attr->psz_value = strdup( psz_eon );
1232 else /* Attribute without value */
1234 p_attr->psz_field = strdup( &psz_sdp[2] );
1235 p_attr->psz_value = NULL;
1238 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1242 case( 'm' ): /* Media announcement */
1244 /* If we have several medias, we pass the announcement to
1245 * LIVE.COM, so just count them */
1247 if( p_sdp->i_media == 1 )
1249 p_sdp->psz_media = strdup( &psz_sdp[2] );
1256 if( p_sdp->i_media > 1 )
1259 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1269 FreeSDP( p_sdp ); p_sdp = NULL;
1279 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1282 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1286 net_StopSend( i_fd );
1287 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1288 p_sd->p_sys->i_fd, i_fd );
1292 return VLC_EGENERIC;
1296 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1298 int i_result, i_dstsize, n;
1299 unsigned char *psz_dst;
1302 d_stream.zalloc = (alloc_func)0;
1303 d_stream.zfree = (free_func)0;
1304 d_stream.opaque = (voidpf)0;
1306 i_result = inflateInit(&d_stream);
1307 if( i_result != Z_OK )
1309 printf( "inflateInit() failed. Result: %d\n", i_result );
1312 d_stream.next_in = (Bytef *)psz_src;
1313 d_stream.avail_in = i_len;
1321 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1322 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1323 d_stream.avail_out = 1000;
1325 i_result = inflate(&d_stream, Z_NO_FLUSH);
1326 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1328 printf( "Zlib decompression failed. Result: %d\n", i_result );
1332 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1333 ( i_result != Z_STREAM_END ) );
1335 i_dstsize = d_stream.total_out;
1336 inflateEnd( &d_stream );
1338 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1345 static void FreeSDP( sdp_t *p_sdp )
1348 FREENULL( p_sdp->psz_sdp );
1349 FREENULL( p_sdp->psz_sessionname );
1350 FREENULL( p_sdp->psz_connection );
1351 FREENULL( p_sdp->psz_media );
1352 FREENULL( p_sdp->psz_uri );
1353 FREENULL( p_sdp->psz_username );
1354 FREENULL( p_sdp->psz_network_type );
1356 FREENULL( p_sdp->psz_address );
1357 FREENULL( p_sdp->psz_address_type );
1359 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1361 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1362 FREENULL( p_sdp->pp_attributes[i]->psz_field );
1363 FREENULL( p_sdp->pp_attributes[i]->psz_value );
1364 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1370 static int RemoveAnnounce( services_discovery_t *p_sd,
1371 sap_announce_t *p_announce )
1375 if( p_announce->p_sdp )
1377 FreeSDP( p_announce->p_sdp );
1378 p_announce->p_sdp = NULL;
1381 if( p_announce->i_input_id > -1 )
1383 playlist_LockDeleteAllFromInput(
1384 p_sd->p_sys->p_playlist, p_announce->i_input_id );
1387 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1389 if( p_sd->p_sys->pp_announces[i] == p_announce )
1391 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1402 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1404 /* A session is identified by
1405 * username, session_id, network type, address type and address */
1406 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1407 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1408 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1409 p_sdp1->psz_address && p_sdp2->psz_address )
1411 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1412 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1413 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1414 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1415 p_sdp1->i_session_id == p_sdp2->i_session_id )
1431 static void CacheLoad( services_discovery_t *p_sd )
1433 msg_Warn( p_sd, "cache not implemented") ;
1436 static void CacheSave( services_discovery_t *p_sd )
1438 msg_Warn( p_sd, "cache not implemented") ;