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_IPV4_TEXT N_( "IPv4-SAP listening" )
80 #define SAP_IPV4_LONGTEXT N_( \
81 "Set this if you want the SAP module to listen to IPv4 announcements " \
82 "on the standard address." )
83 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
84 #define SAP_IPV6_LONGTEXT N_( \
85 "Set this if you want the SAP module to listen to IPv6 announcements " \
86 "on the standard address." )
87 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
88 #define SAP_SCOPE_LONGTEXT N_( \
89 "Sets the scope for IPv6 announcements (default is 8)." )
90 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
91 #define SAP_TIMEOUT_LONGTEXT N_( \
92 "Sets the time before SAP items get deleted if no new announcement " \
94 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
95 #define SAP_PARSE_LONGTEXT N_( \
96 "When SAP can it will try to parse the SAP. If you don't select " \
97 "this, all announcements will be parsed by the livedotcom module." )
98 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
99 #define SAP_STRICT_LONGTEXT N_( \
100 "When this is set, the SAP parser will discard some non-compliant " \
102 #define SAP_CACHE_TEXT N_("Use SAP cache")
103 #define SAP_CACHE_LONGTEXT N_( \
104 "If this option is selected, a SAP caching mechanism will be used. " \
105 "This will result in lower SAP startup time, but you could end up " \
106 "with items corresponding to legacy streams." )
107 #define SAP_TIMESHIFT_TEXT N_("Allow timeshifting")
108 #define SAP_TIMESHIFT_LONGTEXT N_( \
109 "Enable timeshifting automatically for streams " \
110 "discovered through SAP announcements." )
113 static int Open ( vlc_object_t * );
114 static void Close( vlc_object_t * );
115 static int OpenDemux ( vlc_object_t * );
116 static void CloseDemux ( vlc_object_t * );
119 set_shortname( _("SAP"));
120 set_description( _("SAP Announcements") );
121 set_category( CAT_PLAYLIST );
122 set_subcategory( SUBCAT_PLAYLIST_SD );
124 add_bool( "sap-ipv4", 1 , NULL,
125 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
126 add_bool( "sap-ipv6", 1 , NULL,
127 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
128 add_integer( "sap-timeout", 1800, NULL,
129 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
130 add_bool( "sap-parse", 1 , NULL,
131 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
132 add_bool( "sap-strict", 0 , NULL,
133 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
134 add_bool( "sap-cache", 0 , NULL,
135 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
136 add_bool( "sap-timeshift", 0 , NULL,
137 SAP_TIMESHIFT_TEXT,SAP_TIMESHIFT_LONGTEXT, VLC_TRUE );
138 add_suppressed_string( "sap-addr" );
140 set_capability( "services_discovery", 0 );
141 set_callbacks( Open, Close );
144 set_description( _("SDP file parser for UDP") );
145 add_shortcut( "sdp" );
146 set_capability( "demux2", 51 );
147 set_callbacks( OpenDemux, CloseDemux );
151 /*****************************************************************************
153 *****************************************************************************/
155 typedef struct sdp_t sdp_t;
156 typedef struct attribute_t attribute_t;
157 typedef struct sap_announce_t sap_announce_t;
159 /* The structure that contains sdp information */
165 char *psz_sessionname;
167 /* Raw m= and c= fields */
168 char *psz_connection;
173 char *psz_network_type;
174 char *psz_address_type;
176 int64_t i_session_id;
181 int i_in; /* IP version */
187 attribute_t **pp_attributes;
196 struct sap_announce_t
201 uint32_t i_source[4];
203 /* SAP annnounces must only contain one SDP */
207 // playlist_item_t *p_item;
210 struct services_discovery_sys_t
212 /* Socket descriptors */
217 playlist_item_t *p_node;
218 playlist_t *p_playlist;
220 /* Table of announces */
222 struct sap_announce_t **pp_announces;
227 vlc_bool_t b_timeshift;
237 /*****************************************************************************
239 *****************************************************************************/
243 static int Demux( demux_t *p_demux );
244 static int Control( demux_t *, int, va_list );
245 static void Run ( services_discovery_t *p_sd );
247 /* Main parsing functions */
248 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
249 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
250 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
251 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
252 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
255 static void CacheLoad( services_discovery_t *p_sd );
256 static void CacheSave( services_discovery_t *p_sd );
257 /* Helper functions */
258 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
259 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
260 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
262 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
264 static void FreeSDP( sdp_t *p_sdp );
268 if( p ) { free( p ); (p) = NULL; }
269 /*****************************************************************************
270 * Open: initialize and create stuff
271 *****************************************************************************/
272 static int Open( vlc_object_t *p_this )
274 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
275 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
276 malloc( sizeof( services_discovery_sys_t ) );
278 playlist_view_t *p_view;
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" );
292 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
297 /* Cache sap_timeshift value */
298 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
299 ? VLC_TRUE : VLC_FALSE;
301 /* Create our playlist node */
302 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
305 if( !p_sys->p_playlist )
307 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
311 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
312 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
313 _("Session Announcements (SAP)"), p_view->p_root );
314 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
315 p_sys->p_node->i_flags &= ~PLAYLIST_SKIP_FLAG;
316 val.b_bool = VLC_TRUE;
317 var_Set( p_sys->p_playlist, "intf-change", val );
319 p_sys->i_announces = 0;
320 p_sys->pp_announces = NULL;
325 /*****************************************************************************
326 * OpenDemux: initialize and create stuff
327 *****************************************************************************/
328 static int OpenDemux( vlc_object_t *p_this )
330 demux_t *p_demux = (demux_t *)p_this;
332 int i_max_sdp = 1024;
334 char *psz_sdp = NULL;
337 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
339 /* We want livedotcom module to parse this SDP file */
346 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
348 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
349 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
350 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
356 psz_sdp = (char *)malloc( i_max_sdp );
357 if( !psz_sdp ) return VLC_EGENERIC;
359 /* Gather the complete sdp file */
362 int i_read = stream_Read( p_demux->s,
363 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
367 msg_Err( p_demux, "failed to read SDP" );
373 if( i_read < i_max_sdp - i_sdp - 1 )
375 psz_sdp[i_sdp] = '\0';
380 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
383 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
387 msg_Warn( p_demux, "invalid SDP");
391 if( p_sdp->i_media > 1 )
396 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
398 p_sdp->psz_uri = NULL;
400 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
401 p_sdp->i_media_type != 14 )
404 if( p_sdp->psz_uri == NULL ) goto error;
406 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
407 p_demux->p_sys->p_sdp = p_sdp;
408 p_demux->pf_control = Control;
409 p_demux->pf_demux = Demux;
416 if( p_sdp ) FreeSDP( p_sdp );
417 stream_Seek( p_demux->s, 0 );
421 /*****************************************************************************
423 *****************************************************************************/
424 static void Close( vlc_object_t *p_this )
426 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
427 services_discovery_sys_t *p_sys = p_sd->p_sys;
431 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
433 net_Close( p_sys->pi_fd[i] );
435 FREE( p_sys->pi_fd );
437 if( config_GetInt( p_sd, "sap-cache" ) )
442 for( i = p_sys->i_announces - 1; i>= 0; i-- )
444 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
446 FREE( p_sys->pp_announces );
448 if( p_sys->p_playlist )
450 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
452 vlc_object_release( p_sys->p_playlist );
458 /*****************************************************************************
459 * CloseDemux: Close the demuxer
460 *****************************************************************************/
461 static void CloseDemux( vlc_object_t *p_this )
466 /*****************************************************************************
467 * Run: main SAP thread
468 *****************************************************************************
469 * Listens to SAP packets, and sends them to packet_handle
470 *****************************************************************************/
471 #define MAX_SAP_BUFFER 5000
473 static void Run( services_discovery_t *p_sd )
478 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
479 * DNS queries, even if the DNS server returns an error with milliseconds.
480 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
481 * Winsock 1.1 from Windows 95, if not Windows 3.1.
482 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
483 * we have to open sockets in Run() rather than Open(). */
484 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
486 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
487 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
488 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
489 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
491 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
493 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
496 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
498 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
499 InitSocket( p_sd, psz_address, SAP_PORT );
503 if( p_sd->p_sys->i_fd == 0 )
505 msg_Err( p_sd, "unable to listen on any address" );
509 /* read SAP packets */
510 while( !p_sd->b_die )
513 uint8_t p_buffer[MAX_SAP_BUFFER+1];
515 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
516 p_sd->p_sys->i_fd, p_buffer,
517 MAX_SAP_BUFFER, 500000 );
519 /* Check for items that need deletion */
520 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
522 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
524 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
526 struct sap_announce_t *p_announce;
527 p_announce = p_sd->p_sys->pp_announces[i];
529 /* Remove the playlist item */
530 playlist_LockDelete( p_sd->p_sys->p_playlist,
531 p_announce->i_item_id );
533 /* Remove the sap_announce from the array */
534 REMOVE_ELEM( p_sd->p_sys->pp_announces,
535 p_sd->p_sys->i_announces, i );
541 /* Minimum length is > 6 */
546 msg_Warn( p_sd, "socket read error" );
551 p_buffer[i_read] = '\0';
553 /* Parse the packet */
554 ParseSAP( p_sd, p_buffer, i_read );
558 /**********************************************************************
559 * Demux: reads and demuxes data packets
560 * Return -1 if error, 0 if EOF, 1 else
561 **********************************************************************/
562 static int Demux( demux_t *p_demux )
564 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
565 playlist_t *p_playlist;
567 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
570 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
572 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
573 PLAYLIST_APPEND, PLAYLIST_END );
575 vlc_object_release( p_playlist );
576 if( p_sdp ) FreeSDP( p_sdp );
581 static int Control( demux_t *p_demux, int i_query, va_list args )
586 /**************************************************************
588 **************************************************************/
590 /* i_read is at least > 6 */
591 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
593 int i_version, i_address_type, i_hash, i;
594 char *psz_sdp, *psz_foo, *psz_initial_sdp;
596 vlc_bool_t b_compressed;
597 vlc_bool_t b_need_delete = VLC_FALSE;
599 /* First, check the sap announce is correct */
600 i_version = p_buffer[0] >> 5;
603 msg_Dbg( p_sd, "strange sap version %d found", i_version );
606 i_address_type = p_buffer[0] & 0x10;
608 if( (p_buffer[0] & 0x08) != 0 )
610 msg_Dbg( p_sd, "reserved bit incorrectly set" );
614 if( (p_buffer[0] & 0x04) != 0 )
616 msg_Dbg( p_sd, "session deletion packet" );
617 b_need_delete = VLC_TRUE;
620 if( p_buffer[0] & 0x02 )
622 msg_Dbg( p_sd, "encrypted packet, unsupported" );
626 b_compressed = p_buffer[0] & 0x01;
628 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
630 if( p_sd->p_sys->b_strict && i_hash == 0 )
632 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
636 psz_sdp = (char *)p_buffer + 4;
637 psz_initial_sdp = psz_sdp;
639 if( i_address_type == 0 ) /* ipv4 source address */
644 msg_Warn( p_sd, "too short SAP packet" );
648 else /* ipv6 source address */
653 msg_Warn( p_sd, "too short SAP packet" );
661 uint8_t *p_decompressed_buffer = NULL;
662 int i_decompressed_size;
664 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
665 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
666 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
668 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
669 psz_sdp[i_decompressed_size] = '\0';
670 free( p_decompressed_buffer );
673 msg_Warn( p_sd, "ignoring compressed sap packet" );
678 /* Add the size of authentification info */
679 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
681 msg_Warn( p_sd, "too short SAP packet\n");
684 psz_sdp += p_buffer[1];
687 /* Skip payload type */
688 /* Handle announces without \0 between SAP and SDP */
689 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
691 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
693 msg_Warn( p_sd, "empty SDP ?");
698 if( *psz_sdp == '\0' )
702 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
704 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
706 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
708 msg_Warn( p_sd, "package without content" );
713 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
720 /* Decide whether we should add a playlist item for this SDP */
721 /* Parse connection information (c= & m= ) */
722 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
724 p_sdp->psz_uri = NULL;
727 /* Multi-media or no-parse -> pass to LIVE.COM */
728 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
729 p_sdp->i_media_type != 32 &&
730 p_sdp->i_media_type != 33) ||
731 p_sd->p_sys->b_parse == VLC_FALSE )
733 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
734 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
737 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
739 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
742 /* FIXME: we create a new announce each time the sdp changes */
743 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
747 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
752 p_sd->p_sys->pp_announces[i]->i_last = mdate();
759 if( p_sdp->i_media > 1 )
761 msg_Dbg( p_sd, "passing to liveMedia" );
764 CreateAnnounce( p_sd, i_hash, p_sdp );
769 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
772 playlist_item_t *p_item, *p_child;
774 sap_announce_t *p_sap = (sap_announce_t *)malloc(
775 sizeof(sap_announce_t ) );
776 services_discovery_sys_t *p_sys;
782 EnsureUTF8( p_sdp->psz_sessionname );
783 p_sap->i_last = mdate();
784 p_sap->i_hash = i_hash;
785 p_sap->p_sdp = p_sdp;
786 p_sap->i_item_id = -1;
788 /* Create the actual playlist item here */
789 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, p_sdp->psz_sessionname );
797 if( p_sys->b_timeshift )
798 playlist_ItemAddOption( p_item, ":access-filter=timeshift" );
800 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
801 if( psz_value != NULL )
803 vlc_input_item_AddInfo( &p_item->input, _("Session"),
804 _("Tool"), psz_value );
806 if( strcmp( p_sdp->psz_username, "-" ) )
808 vlc_input_item_AddInfo( &p_item->input, _("Session"),
809 _("User"), p_sdp->psz_username );
812 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
814 if( psz_value == NULL )
816 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
819 /* Find or Create the group playlist non-playable item */
820 if( psz_value != NULL )
822 EnsureUTF8( psz_value );
824 p_child = playlist_ChildSearchName( p_sys->p_node, psz_value );
826 if( p_child == NULL )
828 p_child = playlist_NodeCreate( p_sys->p_playlist,
829 VIEW_CATEGORY, psz_value,
831 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
836 p_child = p_sys->p_node;
839 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
840 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
842 playlist_NodeAddItem( p_sys->p_playlist, p_item, VIEW_CATEGORY, p_child,
843 PLAYLIST_APPEND, PLAYLIST_END );
845 p_sap->i_item_id = p_item->input.i_id;
847 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
852 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
856 for( i = 0 ; i< p_sdp->i_attributes; i++ )
858 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
859 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
861 return p_sdp->pp_attributes[i]->psz_value;
868 /* Fill p_sdp->psz_uri */
869 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
873 char *psz_uri = NULL;
874 char *psz_proto = NULL;
875 char psz_source[256];
879 if( p_sdp->psz_connection )
881 psz_parse = p_sdp->psz_connection;
883 psz_eof = strchr( psz_parse, ' ' );
888 psz_parse = psz_eof + 1;
892 msg_Warn( p_obj, "unable to parse c field (1)");
896 psz_eof = strchr( psz_parse, ' ' );
901 if( !strncmp( psz_parse, "IP4", 3 ) )
905 else if( !strncmp( psz_parse, "IP6", 3 ) )
913 psz_parse = psz_eof + 1;
917 msg_Warn( p_obj, "unable to parse c field (2)");
921 psz_eof = strchr( psz_parse, '/' );
929 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
931 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
933 asprintf( &psz_uri, "[%s]", psz_parse );
935 else psz_uri = strdup( psz_parse );
940 if( p_sdp->psz_media )
942 psz_parse = p_sdp->psz_media;
944 psz_eof = strchr( psz_parse, ' ' );
950 if( strncmp( psz_parse, "audio", 5 ) &&
951 strncmp( psz_parse, "video", 5 ) )
953 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
958 psz_parse = psz_eof + 1;
962 msg_Warn( p_obj, "unable to parse m field (1)");
967 psz_eof = strchr( psz_parse, ' ' );
973 /* FIXME : multiple port ! */
974 i_port = atoi( psz_parse );
976 if( i_port <= 0 || i_port >= 65536 )
978 msg_Warn( p_obj, "invalid transport port %i", i_port );
981 psz_parse = psz_eof + 1;
985 msg_Warn( p_obj, "unable to parse m field (2)");
990 psz_eof = strchr( psz_parse, ' ' );
995 psz_proto = strdup( psz_parse );
997 psz_parse = psz_eof + 1;
998 p_sdp->i_media_type = atoi( psz_parse );
1003 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1004 p_sdp->i_media_type = 33;
1005 psz_proto = strdup( psz_parse );
1009 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1012 psz_proto = strdup( "rtp" );
1014 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1017 psz_proto = strdup( "udp" );
1020 /* FIXME: HTTP support */
1027 /* handle SSM case */
1028 psz_parse = GetAttribute( p_sdp, "source-filter" );
1029 psz_source[0] = '\0';
1031 if( psz_parse ) sscanf( psz_parse, " incl IN IP%*s %*s %255s ", psz_source);
1033 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1041 /***********************************************************************
1042 * ParseSDP : SDP parsing
1043 * *********************************************************************
1044 * Validate SDP and parse all fields
1045 ***********************************************************************/
1046 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1049 vlc_bool_t b_invalid = VLC_FALSE;
1050 vlc_bool_t b_end = VLC_FALSE;
1051 if( psz_sdp == NULL )
1056 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1058 msg_Warn( p_obj, "bad packet" );
1062 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1066 p_sdp->psz_sdp = strdup( psz_sdp );
1067 if( p_sdp->psz_sdp == NULL )
1073 p_sdp->psz_sessionname = NULL;
1074 p_sdp->psz_media = NULL;
1075 p_sdp->psz_connection = NULL;
1076 p_sdp->psz_uri = NULL;
1077 p_sdp->psz_address = NULL;
1078 p_sdp->psz_address_type= NULL;
1081 p_sdp->i_attributes = 0;
1082 p_sdp->pp_attributes = NULL;
1084 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1091 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1092 *psz_sdp == ' ' || *psz_sdp == '\t' )
1097 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1099 psz_eol = psz_sdp + strlen( psz_sdp );
1102 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1107 if( psz_eol <= psz_sdp )
1113 /* no space allowed between fields */
1114 if( psz_sdp[1] != '=' )
1116 msg_Warn( p_obj, "invalid packet" ) ;
1121 /* Now parse each line */
1122 switch( psz_sdp[0] )
1127 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1132 /* o field is <username> <session id> <version>
1133 * <network type> <address type> <address> */
1135 #define GET_FIELD( store ) \
1136 psz_eof = strchr( psz_parse, ' ' ); \
1139 *psz_eof=0; store = strdup( psz_parse ); \
1143 if( i_field != 5 ) \
1145 b_invalid = VLC_TRUE; break; \
1149 store = strdup( psz_parse ); \
1152 psz_parse = psz_eof + 1; i_field++;
1155 psz_parse = &psz_sdp[2];
1156 GET_FIELD( p_sdp->psz_username );
1157 GET_FIELD( psz_sess_id );
1159 p_sdp->i_session_id = atoll( psz_sess_id );
1161 FREE( psz_sess_id );
1163 GET_FIELD( psz_sess_id );
1164 FREE( psz_sess_id );
1166 GET_FIELD( p_sdp->psz_network_type );
1167 GET_FIELD( p_sdp->psz_address_type );
1168 GET_FIELD( p_sdp->psz_address );
1179 case( 'a' ): /* attribute */
1181 char *psz_eon = strchr( &psz_sdp[2], ':' );
1182 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1184 /* Attribute with value */
1189 p_attr->psz_field = strdup( &psz_sdp[2] );
1190 p_attr->psz_value = strdup( psz_eon );
1192 else /* Attribute without value */
1194 p_attr->psz_field = strdup( &psz_sdp[2] );
1195 p_attr->psz_value = NULL;
1198 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1202 case( 'm' ): /* Media announcement */
1204 /* If we have several medias, we pass the announcement to
1205 * LIVE.COM, so just count them */
1207 if( p_sdp->i_media == 1 )
1209 p_sdp->psz_media = strdup( &psz_sdp[2] );
1216 if( p_sdp->i_media > 1 )
1219 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1239 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1242 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1246 net_StopSend( i_fd );
1247 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1248 p_sd->p_sys->i_fd, i_fd );
1252 return VLC_EGENERIC;
1256 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1258 int i_result, i_dstsize, n;
1259 unsigned char *psz_dst;
1262 d_stream.zalloc = (alloc_func)0;
1263 d_stream.zfree = (free_func)0;
1264 d_stream.opaque = (voidpf)0;
1266 i_result = inflateInit(&d_stream);
1267 if( i_result != Z_OK )
1269 printf( "inflateInit() failed. Result: %d\n", i_result );
1273 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1274 i_position = p_playlist->i_index;
1276 /* Gather the complete sdp file */
1279 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1281 d_stream.next_in = (Bytef *)psz_src;
1282 d_stream.avail_in = i_len;
1290 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1291 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1292 d_stream.avail_out = 1000;
1294 i_result = inflate(&d_stream, Z_NO_FLUSH);
1295 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1297 printf( "Zlib decompression failed. Result: %d\n", i_result );
1301 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1302 ( i_result != Z_STREAM_END ) );
1304 i_dstsize = d_stream.total_out;
1305 inflateEnd( &d_stream );
1307 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1314 static void FreeSDP( sdp_t *p_sdp )
1317 FREE( p_sdp->psz_sdp );
1318 FREE( p_sdp->psz_sessionname );
1319 FREE( p_sdp->psz_connection );
1320 FREE( p_sdp->psz_media );
1321 FREE( p_sdp->psz_uri );
1322 FREE( p_sdp->psz_username );
1323 FREE( p_sdp->psz_network_type );
1325 FREE( p_sdp->psz_address );
1326 FREE( p_sdp->psz_address_type );
1328 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1330 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1331 FREE( p_sdp->pp_attributes[i]->psz_field );
1332 FREE( p_sdp->pp_attributes[i]->psz_value );
1333 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1339 static int RemoveAnnounce( services_discovery_t *p_sd,
1340 sap_announce_t *p_announce )
1344 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1346 if( p_announce->i_item_id > -1 )
1348 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1351 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1353 if( p_sd->p_sys->pp_announces[i] == p_announce )
1355 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1366 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1368 /* A session is identified by
1369 * username, session_id, network type, address type and address */
1370 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1371 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1372 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1373 p_sdp1->psz_address && p_sdp2->psz_address )
1375 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1376 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1377 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1378 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1379 p_sdp1->i_session_id == p_sdp2->i_session_id )
1395 static void CacheLoad( services_discovery_t *p_sd )
1397 msg_Warn( p_sd, "cache not implemented") ;
1400 static void CacheSave( services_discovery_t *p_sd )
1402 msg_Warn( p_sd, "cache not implemented") ;