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., 59 Temple Place - Suite 330, Boston, MA 02111, 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_( "Listen for SAP announcements on another address" )
81 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
82 #define SAP_IPV4_LONGTEXT N_( \
83 "Set this if you want the SAP module to listen to IPv4 announcements " \
84 "on the standard address." )
85 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
86 #define SAP_IPV6_LONGTEXT N_( \
87 "Set this if you want the SAP module to listen to IPv6 announcements " \
88 "on the standard address." )
89 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
90 #define SAP_SCOPE_LONGTEXT N_( \
91 "Sets the scope for IPv6 announcements (default is 8)." )
92 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
93 #define SAP_TIMEOUT_LONGTEXT N_( \
94 "Sets the time before SAP items get deleted if no new announcement " \
96 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
97 #define SAP_PARSE_LONGTEXT N_( \
98 "When SAP can it will try to parse the SAP. If you don't select " \
99 "this, all announcements will be parsed by the livedotcom module." )
100 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
101 #define SAP_STRICT_LONGTEXT N_( \
102 "When this is set, the SAP parser will discard some non-compliant " \
104 #define SAP_CACHE_TEXT N_("Use SAP cache")
105 #define SAP_CACHE_LONGTEXT N_( \
106 "If this option is selected, a SAP caching mechanism will be used. " \
107 "This will result in lower SAP startup time, but you could end up " \
108 "with items corresponding to legacy streams." )
109 #define SAP_TIMESHIFT_TEXT N_("Allow timeshifting")
110 #define SAP_TIMESHIFT_LONGTEXT N_( \
111 "Enable timeshifting automatically for streams " \
112 "discovered through SAP announcements." )
115 static int Open ( vlc_object_t * );
116 static void Close( vlc_object_t * );
117 static int OpenDemux ( vlc_object_t * );
118 static void CloseDemux ( vlc_object_t * );
121 set_shortname( _("SAP"));
122 set_description( _("SAP Announcements") );
123 set_category( CAT_PLAYLIST );
124 set_subcategory( SUBCAT_PLAYLIST_SD );
126 add_string( "sap-addr", NULL, NULL,
127 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
128 add_bool( "sap-ipv4", 1 , NULL,
129 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
130 add_bool( "sap-ipv6", 1 , NULL,
131 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
132 add_integer( "sap-timeout", 1800, NULL,
133 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
134 add_bool( "sap-parse", 1 , NULL,
135 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
136 add_bool( "sap-strict", 0 , NULL,
137 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
138 add_bool( "sap-cache", 0 , NULL,
139 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
140 add_bool( "sap-timeshift", 0 , NULL,
141 SAP_TIMESHIFT_TEXT,SAP_TIMESHIFT_LONGTEXT, VLC_TRUE );
143 set_capability( "services_discovery", 0 );
144 set_callbacks( Open, Close );
147 set_description( _("SDP file parser for UDP") );
148 add_shortcut( "sdp" );
149 set_capability( "demux2", 51 );
150 set_callbacks( OpenDemux, CloseDemux );
154 /*****************************************************************************
156 *****************************************************************************/
158 typedef struct sdp_t sdp_t;
159 typedef struct attribute_t attribute_t;
160 typedef struct sap_announce_t sap_announce_t;
162 /* The structure that contains sdp information */
168 char *psz_sessionname;
170 /* Raw m= and c= fields */
171 char *psz_connection;
176 char *psz_network_type;
177 char *psz_address_type;
179 int64_t i_session_id;
184 int i_in; /* IP version */
190 attribute_t **pp_attributes;
199 struct sap_announce_t
204 uint32_t i_source[4];
206 /* SAP annnounces must only contain one SDP */
210 // playlist_item_t *p_item;
213 struct services_discovery_sys_t
215 /* Socket descriptors */
220 playlist_item_t *p_node;
221 playlist_t *p_playlist;
223 /* Table of announces */
225 struct sap_announce_t **pp_announces;
230 vlc_bool_t b_timeshift;
240 /*****************************************************************************
242 *****************************************************************************/
246 static int Demux( demux_t *p_demux );
247 static int Control( demux_t *, int, va_list );
248 static void Run ( services_discovery_t *p_sd );
250 /* Main parsing functions */
251 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
252 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
253 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
254 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
255 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
258 static void CacheLoad( services_discovery_t *p_sd );
259 static void CacheSave( services_discovery_t *p_sd );
260 /* Helper functions */
261 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
262 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
263 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
265 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
267 static void FreeSDP( sdp_t *p_sdp );
271 if( p ) { free( p ); (p) = NULL; }
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 playlist_view_t *p_view;
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" );
295 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
300 /* Cache sap_timeshift value */
301 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
302 ? VLC_TRUE : VLC_FALSE;
304 /* Create our playlist node */
305 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
308 if( !p_sys->p_playlist )
310 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
314 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
315 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
316 _("Session Announcements (SAP)"), p_view->p_root );
317 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
318 p_sys->p_node->i_flags &= ~PLAYLIST_SKIP_FLAG;
319 val.b_bool = VLC_TRUE;
320 var_Set( p_sys->p_playlist, "intf-change", val );
322 p_sys->i_announces = 0;
323 p_sys->pp_announces = NULL;
328 /*****************************************************************************
329 * OpenDemux: initialize and create stuff
330 *****************************************************************************/
331 static int OpenDemux( vlc_object_t *p_this )
333 demux_t *p_demux = (demux_t *)p_this;
335 int i_max_sdp = 1024;
337 char *psz_sdp = NULL;
340 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
342 /* We want livedotcom module to parse this SDP file */
349 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
351 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
352 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
353 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
359 psz_sdp = (char *)malloc( i_max_sdp );
360 if( !psz_sdp ) return VLC_EGENERIC;
362 /* Gather the complete sdp file */
365 int i_read = stream_Read( p_demux->s,
366 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
370 msg_Err( p_demux, "failed to read SDP" );
376 if( i_read < i_max_sdp - i_sdp - 1 )
378 psz_sdp[i_sdp] = '\0';
383 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
386 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
390 msg_Warn( p_demux, "invalid SDP");
394 if( p_sdp->i_media > 1 )
399 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
401 p_sdp->psz_uri = NULL;
403 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
404 p_sdp->i_media_type != 14 )
407 if( p_sdp->psz_uri == NULL ) goto error;
409 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
410 p_demux->p_sys->p_sdp = p_sdp;
411 p_demux->pf_control = Control;
412 p_demux->pf_demux = Demux;
419 if( p_sdp ) FreeSDP( p_sdp );
420 stream_Seek( p_demux->s, 0 );
424 /*****************************************************************************
426 *****************************************************************************/
427 static void Close( vlc_object_t *p_this )
429 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
430 services_discovery_sys_t *p_sys = p_sd->p_sys;
434 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
436 net_Close( p_sys->pi_fd[i] );
438 FREE( p_sys->pi_fd );
440 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 FREE( p_sys->pp_announces );
451 if( p_sys->p_playlist )
453 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
455 vlc_object_release( p_sys->p_playlist );
461 /*****************************************************************************
462 * CloseDemux: Close the demuxer
463 *****************************************************************************/
464 static void CloseDemux( vlc_object_t *p_this )
469 /*****************************************************************************
470 * Run: main SAP thread
471 *****************************************************************************
472 * Listens to SAP packets, and sends them to packet_handle
473 *****************************************************************************/
474 #define MAX_SAP_BUFFER 5000
476 static void Run( services_discovery_t *p_sd )
481 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
482 * DNS queries, even if the DNS server returns an error with milliseconds.
483 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
484 * Winsock 1.1 from Windows 95, if not Windows 3.1.
485 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
486 * we have to open sockets in Run() rather than Open(). */
487 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
489 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
490 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
491 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
492 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
494 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
496 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
499 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
501 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
502 InitSocket( p_sd, psz_address, SAP_PORT );
506 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
507 if( psz_addr && *psz_addr )
509 InitSocket( p_sd, psz_addr, SAP_PORT );
512 if( p_sd->p_sys->i_fd == 0 )
514 msg_Err( p_sd, "unable to listen on any address" );
518 /* read SAP packets */
519 while( !p_sd->b_die )
522 uint8_t p_buffer[MAX_SAP_BUFFER+1];
524 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
525 p_sd->p_sys->i_fd, p_buffer,
526 MAX_SAP_BUFFER, 500000 );
528 /* Check for items that need deletion */
529 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
531 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
533 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
535 struct sap_announce_t *p_announce;
536 p_announce = p_sd->p_sys->pp_announces[i];
538 /* Remove the playlist item */
539 playlist_LockDelete( p_sd->p_sys->p_playlist,
540 p_announce->i_item_id );
542 /* Remove the sap_announce from the array */
543 REMOVE_ELEM( p_sd->p_sys->pp_announces,
544 p_sd->p_sys->i_announces, i );
550 /* Minimum length is > 6 */
555 msg_Warn( p_sd, "socket read error" );
560 p_buffer[i_read] = '\0';
562 /* Parse the packet */
563 ParseSAP( p_sd, p_buffer, i_read );
567 /**********************************************************************
568 * Demux: reads and demuxes data packets
569 * Return -1 if error, 0 if EOF, 1 else
570 **********************************************************************/
571 static int Demux( demux_t *p_demux )
573 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
574 playlist_t *p_playlist;
576 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
579 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
581 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
582 PLAYLIST_APPEND, PLAYLIST_END );
584 vlc_object_release( p_playlist );
585 if( p_sdp ) FreeSDP( p_sdp );
590 static int Control( demux_t *p_demux, int i_query, va_list args )
595 /**************************************************************
597 **************************************************************/
599 /* i_read is at least > 6 */
600 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
602 int i_version, i_address_type, i_hash, i;
603 char *psz_sdp, *psz_foo, *psz_initial_sdp;
605 vlc_bool_t b_compressed;
606 vlc_bool_t b_need_delete = VLC_FALSE;
608 /* First, check the sap announce is correct */
609 i_version = p_buffer[0] >> 5;
612 msg_Dbg( p_sd, "strange sap version %d found", i_version );
615 i_address_type = p_buffer[0] & 0x10;
617 if( (p_buffer[0] & 0x08) != 0 )
619 msg_Dbg( p_sd, "reserved bit incorrectly set" );
623 if( (p_buffer[0] & 0x04) != 0 )
625 msg_Dbg( p_sd, "session deletion packet" );
626 b_need_delete = VLC_TRUE;
629 if( p_buffer[0] & 0x02 )
631 msg_Dbg( p_sd, "encrypted packet, unsupported" );
635 b_compressed = p_buffer[0] & 0x01;
637 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
639 if( p_sd->p_sys->b_strict && i_hash == 0 )
641 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
645 psz_sdp = (char *)p_buffer + 4;
646 psz_initial_sdp = psz_sdp;
648 if( i_address_type == 0 ) /* ipv4 source address */
653 msg_Warn( p_sd, "too short SAP packet\n" );
657 else /* ipv6 source address */
662 msg_Warn( p_sd, "too short SAP packet\n" );
670 uint8_t *p_decompressed_buffer = NULL;
671 int i_decompressed_size;
673 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
674 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
675 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
677 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
678 psz_sdp[i_decompressed_size] = '\0';
679 free( p_decompressed_buffer );
682 msg_Warn( p_sd, "Ignoring compressed sap packet" );
687 /* Add the size of authentification info */
688 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
690 msg_Warn( p_sd, "too short SAP packet\n");
693 psz_sdp += p_buffer[1];
696 /* Skip payload type */
697 /* Handle announces without \0 between SAP and SDP */
698 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
700 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
702 msg_Warn( p_sd, "empty SDP ?");
707 if( *psz_sdp == '\0' )
711 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
713 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
715 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
717 msg_Warn( p_sd, "package without content" );
722 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
729 /* Decide whether we should add a playlist item for this SDP */
730 /* Parse connection information (c= & m= ) */
731 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
733 p_sdp->psz_uri = NULL;
736 /* Multi-media or no-parse -> pass to LIVE.COM */
737 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
738 p_sdp->i_media_type != 32 &&
739 p_sdp->i_media_type != 33) ||
740 p_sd->p_sys->b_parse == VLC_FALSE )
742 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
743 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
746 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
748 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
751 /* FIXME: we create a new announce each time the sdp changes */
752 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
756 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
761 p_sd->p_sys->pp_announces[i]->i_last = mdate();
768 if( p_sdp->i_media > 1 )
770 msg_Dbg( p_sd, "passing to LIVE.COM" );
773 CreateAnnounce( p_sd, i_hash, p_sdp );
778 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
781 playlist_item_t *p_item, *p_child;
783 sap_announce_t *p_sap = (sap_announce_t *)malloc(
784 sizeof(sap_announce_t ) );
785 services_discovery_sys_t *p_sys;
791 EnsureUTF8( p_sdp->psz_sessionname );
792 p_sap->i_last = mdate();
793 p_sap->i_hash = i_hash;
794 p_sap->p_sdp = p_sdp;
795 p_sap->i_item_id = -1;
797 /* Create the actual playlist item here */
798 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, p_sdp->psz_sessionname );
806 if( p_sys->b_timeshift )
807 playlist_ItemAddOption( p_item, ":access-filter=timeshift" );
809 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
810 if( psz_value != NULL )
812 vlc_input_item_AddInfo( &p_item->input, _("Session"),
813 _("Tool"), psz_value );
815 if( strcmp( p_sdp->psz_username, "-" ) )
817 vlc_input_item_AddInfo( &p_item->input, _("Session"),
818 _("User"), p_sdp->psz_username );
821 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
823 if( psz_value == NULL )
825 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
828 /* Find or Create the group playlist non-playable item */
829 if( psz_value != NULL )
831 EnsureUTF8( psz_value );
833 p_child = playlist_ChildSearchName( p_sys->p_node, psz_value );
835 if( p_child == NULL )
837 p_child = playlist_NodeCreate( p_sys->p_playlist,
838 VIEW_CATEGORY, psz_value,
840 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
845 p_child = p_sys->p_node;
848 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
849 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
851 playlist_NodeAddItem( p_sys->p_playlist, p_item, VIEW_CATEGORY, p_child,
852 PLAYLIST_APPEND, PLAYLIST_END );
854 p_sap->i_item_id = p_item->input.i_id;
856 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
861 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
865 for( i = 0 ; i< p_sdp->i_attributes; i++ )
867 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
868 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
870 return p_sdp->pp_attributes[i]->psz_value;
877 /* Fill p_sdp->psz_uri */
878 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
882 char *psz_uri = NULL;
883 char *psz_proto = NULL;
887 if( p_sdp->psz_connection )
889 psz_parse = p_sdp->psz_connection;
891 psz_eof = strchr( psz_parse, ' ' );
896 psz_parse = psz_eof + 1;
900 msg_Warn( p_obj, "unable to parse c field (1)");
904 psz_eof = strchr( psz_parse, ' ' );
909 if( !strncmp( psz_parse, "IP4", 3 ) )
913 else if( !strncmp( psz_parse, "IP6", 3 ) )
921 psz_parse = psz_eof + 1;
925 msg_Warn( p_obj, "unable to parse c field (2)");
929 psz_eof = strchr( psz_parse, '/' );
937 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
939 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
941 asprintf( &psz_uri, "[%s]", psz_parse );
943 else psz_uri = strdup( psz_parse );
948 if( p_sdp->psz_media )
950 psz_parse = p_sdp->psz_media;
952 psz_eof = strchr( psz_parse, ' ' );
958 if( strncmp( psz_parse, "audio", 5 ) &&
959 strncmp( psz_parse, "video", 5 ) )
961 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
966 psz_parse = psz_eof + 1;
970 msg_Warn( p_obj, "unable to parse m field (1)");
975 psz_eof = strchr( psz_parse, ' ' );
981 /* FIXME : multiple port ! */
982 i_port = atoi( psz_parse );
984 if( i_port <= 0 || i_port >= 65536 )
986 msg_Warn( p_obj, "invalid transport port %i", i_port );
989 psz_parse = psz_eof + 1;
993 msg_Warn( p_obj, "unable to parse m field (2)");
998 psz_eof = strchr( psz_parse, ' ' );
1003 psz_proto = strdup( psz_parse );
1005 psz_parse = psz_eof + 1;
1006 p_sdp->i_media_type = atoi( psz_parse );
1011 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1012 p_sdp->i_media_type = 33;
1013 psz_proto = strdup( psz_parse );
1017 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1020 psz_proto = strdup( "rtp" );
1022 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1025 psz_proto = strdup( "udp" );
1028 /* FIXME: HTTP support */
1035 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1042 /***********************************************************************
1043 * ParseSDP : SDP parsing
1044 * *********************************************************************
1045 * Validate SDP and parse all fields
1046 ***********************************************************************/
1047 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1050 vlc_bool_t b_invalid = VLC_FALSE;
1051 vlc_bool_t b_end = VLC_FALSE;
1052 if( psz_sdp == NULL )
1057 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1059 msg_Warn( p_obj, "Bad packet" );
1063 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1067 p_sdp->psz_sdp = strdup( psz_sdp );
1068 if( p_sdp->psz_sdp == NULL )
1074 p_sdp->psz_sessionname = NULL;
1075 p_sdp->psz_media = NULL;
1076 p_sdp->psz_connection = NULL;
1077 p_sdp->psz_uri = NULL;
1078 p_sdp->psz_address = NULL;
1079 p_sdp->psz_address_type= NULL;
1082 p_sdp->i_attributes = 0;
1083 p_sdp->pp_attributes = NULL;
1085 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1092 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1093 *psz_sdp == ' ' || *psz_sdp == '\t' )
1098 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1100 psz_eol = psz_sdp + strlen( psz_sdp );
1103 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1108 if( psz_eol <= psz_sdp )
1114 /* no space allowed between fields */
1115 if( psz_sdp[1] != '=' )
1117 msg_Warn( p_obj, "invalid packet" ) ;
1122 /* Now parse each line */
1123 switch( psz_sdp[0] )
1128 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1133 /* o field is <username> <session id> <version>
1134 * <network type> <address type> <address> */
1136 #define GET_FIELD( store ) \
1137 psz_eof = strchr( psz_parse, ' ' ); \
1140 *psz_eof=0; store = strdup( psz_parse ); \
1144 if( i_field != 5 ) \
1146 b_invalid = VLC_TRUE; break; \
1150 store = strdup( psz_parse ); \
1153 psz_parse = psz_eof + 1; i_field++;
1156 psz_parse = &psz_sdp[2];
1157 GET_FIELD( p_sdp->psz_username );
1158 GET_FIELD( psz_sess_id );
1160 p_sdp->i_session_id = atoll( psz_sess_id );
1162 FREE( psz_sess_id );
1164 GET_FIELD( psz_sess_id );
1165 FREE( psz_sess_id );
1167 GET_FIELD( p_sdp->psz_network_type );
1168 GET_FIELD( p_sdp->psz_address_type );
1169 GET_FIELD( p_sdp->psz_address );
1180 case( 'a' ): /* attribute */
1182 char *psz_eon = strchr( &psz_sdp[2], ':' );
1183 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1185 /* Attribute with value */
1190 p_attr->psz_field = strdup( &psz_sdp[2] );
1191 p_attr->psz_value = strdup( psz_eon );
1193 else /* Attribute without value */
1195 p_attr->psz_field = strdup( &psz_sdp[2] );
1196 p_attr->psz_value = NULL;
1199 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1203 case( 'm' ): /* Media announcement */
1205 /* If we have several medias, we pass the announcement to
1206 * LIVE.COM, so just count them */
1208 if( p_sdp->i_media == 1 )
1210 p_sdp->psz_media = strdup( &psz_sdp[2] );
1217 if( p_sdp->i_media > 1 )
1220 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1240 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1243 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1247 net_StopSend( i_fd );
1248 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1249 p_sd->p_sys->i_fd, i_fd );
1253 return VLC_EGENERIC;
1257 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1259 int i_result, i_dstsize, n;
1260 unsigned char *psz_dst;
1263 d_stream.zalloc = (alloc_func)0;
1264 d_stream.zfree = (free_func)0;
1265 d_stream.opaque = (voidpf)0;
1267 i_result = inflateInit(&d_stream);
1268 if( i_result != Z_OK )
1270 printf( "inflateInit() failed. Result: %d\n", i_result );
1274 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1275 i_position = p_playlist->i_index;
1277 /* Gather the complete sdp file */
1280 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1282 d_stream.next_in = (Bytef *)psz_src;
1283 d_stream.avail_in = i_len;
1291 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1292 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1293 d_stream.avail_out = 1000;
1295 i_result = inflate(&d_stream, Z_NO_FLUSH);
1296 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1298 printf( "Zlib decompression failed. Result: %d\n", i_result );
1302 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1303 ( i_result != Z_STREAM_END ) );
1305 i_dstsize = d_stream.total_out;
1306 inflateEnd( &d_stream );
1308 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1315 static void FreeSDP( sdp_t *p_sdp )
1318 FREE( p_sdp->psz_sdp );
1319 FREE( p_sdp->psz_sessionname );
1320 FREE( p_sdp->psz_connection );
1321 FREE( p_sdp->psz_media );
1322 FREE( p_sdp->psz_uri );
1323 FREE( p_sdp->psz_username );
1324 FREE( p_sdp->psz_network_type );
1326 FREE( p_sdp->psz_address );
1327 FREE( p_sdp->psz_address_type );
1329 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1331 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1332 FREE( p_sdp->pp_attributes[i]->psz_field );
1333 FREE( p_sdp->pp_attributes[i]->psz_value );
1334 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1340 static int RemoveAnnounce( services_discovery_t *p_sd,
1341 sap_announce_t *p_announce )
1345 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1347 if( p_announce->i_item_id > -1 )
1349 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1352 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1354 if( p_sd->p_sys->pp_announces[i] == p_announce )
1356 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1367 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1369 /* A session is identified by
1370 * username, session_id, network type, address type and address */
1371 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1372 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1373 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1374 p_sdp1->psz_address && p_sdp2->psz_address )
1376 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1377 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1378 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1379 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1380 p_sdp1->i_session_id == p_sdp2->i_session_id )
1396 static void CacheLoad( services_discovery_t *p_sd )
1398 msg_Warn( p_sd, "Cache not implemented") ;
1401 static void CacheSave( services_discovery_t *p_sd )
1403 msg_Warn( p_sd, "Cache not implemented") ;