1 /*****************************************************************************
2 * sap.c : SAP interface module
3 *****************************************************************************
4 * Copyright (C) 2004-2005 VideoLAN
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() */
32 #include <vlc/input.h>
37 #include <errno.h> /* ENOMEM */
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 #define SAP_V4_ADDRESS "224.2.127.254"
61 #define IPV6_ADDR_1 "FF0" /* Scope is inserted between them */
62 #define IPV6_ADDR_2 "::2:7FFE"
65 /*****************************************************************************
67 *****************************************************************************/
68 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
69 #define SAP_ADDR_LONGTEXT N_( "Listen for SAP announces on another address" )
70 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
71 #define SAP_IPV4_LONGTEXT N_( \
72 "Set this if you want the SAP module to listen to IPv4 announces " \
73 "on the standard address" )
74 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
75 #define SAP_IPV6_LONGTEXT N_( \
76 "Set this if you want the SAP module to listen to IPv6 announces " \
77 "on the standard address" )
78 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
79 #define SAP_SCOPE_LONGTEXT N_( \
80 "Sets the scope for IPv6 announces (default is 8)" )
81 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
82 #define SAP_TIMEOUT_LONGTEXT N_( \
83 "Sets the time before SAP items get deleted if no new announce " \
85 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
86 #define SAP_PARSE_LONGTEXT N_( \
87 "When SAP can it will try to parse the SAP. If you don't select " \
88 "this, all announces will be parsed by the livedotcom module" )
89 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
90 #define SAP_STRICT_LONGTEXT N_( \
91 "When this is set, the SAP parser will discard some non-compliant " \
93 #define SAP_CACHE_TEXT N_("Use SAP cache")
94 #define SAP_CACHE_LONGTEXT N_( \
95 "If this option is selected, a SAP caching mechanism will be used." \
96 "This will result in lower SAP startup time, but you could end up " \
97 "with items corresponding to legacy streams." )
100 static int Open ( vlc_object_t * );
101 static void Close( vlc_object_t * );
102 static int OpenDemux ( vlc_object_t * );
103 static void CloseDemux ( vlc_object_t * );
106 set_shortname( _("SAP"));
107 set_description( _("SAP announces") );
108 set_category( CAT_PLAYLIST );
109 set_subcategory( SUBCAT_PLAYLIST_SD );
111 add_string( "sap-addr", NULL, NULL,
112 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
113 add_bool( "sap-ipv4", 1 , NULL,
114 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
115 add_bool( "sap-ipv6", 0 , NULL,
116 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
117 add_string( "sap-ipv6-scope", "8" , NULL,
118 SAP_SCOPE_TEXT, SAP_SCOPE_LONGTEXT, VLC_TRUE);
119 add_integer( "sap-timeout", 1800, NULL,
120 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
121 add_bool( "sap-parse", 1 , NULL,
122 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
123 add_bool( "sap-strict", 0 , NULL,
124 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
125 add_bool( "sap-cache", 0 , NULL,
126 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
128 set_capability( "services_discovery", 0 );
129 set_callbacks( Open, Close );
132 set_description( _("SDP file parser for UDP") );
133 add_shortcut( "sdp" );
134 set_capability( "demux2", 51 );
135 set_callbacks( OpenDemux, CloseDemux );
139 /*****************************************************************************
141 *****************************************************************************/
143 typedef struct sdp_t sdp_t;
144 typedef struct attribute_t attribute_t;
145 typedef struct sap_announce_t sap_announce_t;
147 /* The structure that contains sdp information */
153 char *psz_sessionname;
155 /* Raw m= and c= fields */
156 char *psz_connection;
161 char *psz_network_type;
162 char *psz_address_type;
164 int64_t i_session_id;
169 int i_in; /* IP version */
175 attribute_t **pp_attributes;
184 struct sap_announce_t
189 uint32_t i_source[4];
191 /* SAP annnounces must only contain one SDP */
195 // playlist_item_t *p_item;
198 struct services_discovery_sys_t
200 /* Socket descriptors */
205 playlist_item_t *p_node;
207 /* charset conversion */
208 vlc_iconv_t iconvHandle;
210 /* Table of announces */
212 struct sap_announce_t **pp_announces;
226 /*****************************************************************************
228 *****************************************************************************/
232 static int Demux( demux_t *p_demux );
233 static int Control( demux_t *, int, va_list );
234 static void Run ( services_discovery_t *p_sd );
236 /* Main parsing functions */
237 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
238 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
239 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
240 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
241 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
244 static void CacheLoad( services_discovery_t *p_sd );
245 static void CacheSave( services_discovery_t *p_sd );
246 /* Helper functions */
247 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
248 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
249 static char *convert_from_utf8( struct services_discovery_t *p_sd,
251 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
253 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
254 static void FreeSDP( sdp_t *p_sdp );
257 /* Detect multicast addresses */
258 static int ismult( char * );
261 if( p ) { free( p ); (p) = NULL; }
262 /*****************************************************************************
263 * Open: initialize and create stuff
264 *****************************************************************************/
265 static int Open( vlc_object_t *p_this )
267 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
268 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
269 malloc( sizeof( services_discovery_sys_t ) );
271 playlist_t *p_playlist;
272 playlist_view_t *p_view;
273 char *psz_addr, *psz_charset;
276 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
278 vlc_current_charset( &psz_charset );
279 p_sys->iconvHandle = vlc_iconv_open( psz_charset, "UTF-8" );
281 if( p_sys->iconvHandle == (vlc_iconv_t)(-1) )
283 msg_Warn( p_sd, "Unable to do requested conversion" );
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 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
302 InitSocket( p_sd, SAP_V4_ADDRESS, SAP_PORT );
304 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
306 /* [ + 8x4+7*':' + ] */
307 char psz_address[42];
309 char *psz_scope = var_CreateGetString( p_sd, "sap-ipv6-scope" );
311 if( psz_scope == NULL || *psz_scope == '\0')
317 c_scope = psz_scope[0];
319 snprintf( psz_address, 42, "[%s%c%s]", IPV6_ADDR_1, c_scope,
321 InitSocket( p_sd, psz_address, SAP_PORT );
324 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
325 if( psz_addr && *psz_addr )
327 InitSocket( p_sd, psz_addr, SAP_PORT );
330 if( p_sys->i_fd == 0 )
332 msg_Err( p_sd, "unable to read on any address" );
336 /* Create our playlist node */
337 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
341 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
345 p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
346 p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
347 _("SAP"), p_view->p_root );
348 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
349 val.b_bool = VLC_TRUE;
350 var_Set( p_playlist, "intf-change", val );
352 vlc_object_release( p_playlist );
354 p_sys->i_announces = 0;
355 p_sys->pp_announces = NULL;
360 /*****************************************************************************
361 * OpenDemux: initialize and create stuff
362 *****************************************************************************/
363 static int OpenDemux( vlc_object_t *p_this )
365 demux_t *p_demux = (demux_t *)p_this;
367 int i_max_sdp = 1024;
369 char *psz_sdp = NULL;
375 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
377 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
378 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
379 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
385 psz_sdp = (char *)malloc( i_max_sdp );
386 if( !psz_sdp ) return VLC_EGENERIC;
388 /* Gather the complete sdp file */
391 int i_read = stream_Read( p_demux->s,
392 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
396 msg_Err( p_demux, "failed to read SDP" );
402 if( i_read < i_max_sdp - i_sdp - 1 )
404 psz_sdp[i_sdp] = '\0';
409 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
412 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
416 msg_Warn( p_demux, "invalid SDP");
420 if( p_sdp->i_media > 1 )
425 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
427 p_sdp->psz_uri = NULL;
429 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
430 p_sdp->i_media_type != 14 )
433 if( p_sdp->psz_uri == NULL ) goto error;
435 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
436 p_demux->p_sys->p_sdp = p_sdp;
437 p_demux->pf_control = Control;
438 p_demux->pf_demux = Demux;
445 if( p_sdp ) FreeSDP( p_sdp );
446 stream_Seek( p_demux->s, 0 );
450 /*****************************************************************************
452 *****************************************************************************/
453 static void Close( vlc_object_t *p_this )
455 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
456 services_discovery_sys_t *p_sys = p_sd->p_sys;
458 playlist_t *p_playlist;
461 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
463 net_Close( p_sys->pi_fd[i] );
465 FREE( p_sys->pi_fd );
467 if( config_GetInt( p_sd, "sap-cache" ) )
472 for( i = p_sys->i_announces - 1; i>= 0; i-- )
474 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
476 FREE( p_sys->pp_announces );
478 p_playlist = (playlist_t *) vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
483 playlist_NodeDelete( p_playlist, p_sys->p_node, VLC_TRUE , VLC_TRUE );
484 vlc_object_release( p_playlist );
487 if( p_sys->iconvHandle != (vlc_iconv_t)(-1) )
488 vlc_iconv_close( p_sys->iconvHandle );
493 /*****************************************************************************
494 * CloseDemux: Close the demuxer
495 *****************************************************************************/
496 static void CloseDemux( vlc_object_t *p_this )
501 /*****************************************************************************
502 * Run: main SAP thread
503 *****************************************************************************
504 * Listens to SAP packets, and sends them to packet_handle
505 *****************************************************************************/
506 #define MAX_SAP_BUFFER 5000
508 static void Run( services_discovery_t *p_sd )
511 playlist_t *p_playlist;
513 /* read SAP packets */
514 while( !p_sd->b_die )
517 uint8_t p_buffer[MAX_SAP_BUFFER];
519 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
520 p_sd->p_sys->i_fd, p_buffer,
521 MAX_SAP_BUFFER, 500000 );
523 /* Check for items that need deletion */
524 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
526 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
528 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
530 struct sap_announce_t *p_announce;
531 playlist_item_t * p_item;
532 p_announce = p_sd->p_sys->pp_announces[i];
534 /* Remove the playlist item */
535 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
539 p_item = playlist_ItemGetById( p_playlist,
540 p_announce->i_item_id );
541 if( !p_item ) continue;
543 msg_Dbg( p_sd, "Time out for %s, deleting (%i/%i)",
544 p_item->input.psz_name,
545 i , p_sd->p_sys->i_announces );
547 playlist_Delete( p_playlist, p_announce->i_item_id );
548 vlc_object_release( p_playlist );
551 /* Remove the sap_announce from the array */
552 REMOVE_ELEM( p_sd->p_sys->pp_announces,
553 p_sd->p_sys->i_announces, i );
559 /* Minimum length is > 6 */
564 msg_Warn( p_sd, "socket read error" );
569 p_buffer[i_read] = '\0';
571 /* Parse the packet */
572 ParseSAP( p_sd, p_buffer, i_read );
576 /**********************************************************************
577 * Demux: reads and demuxes data packets
578 * Return -1 if error, 0 if EOF, 1 else
579 **********************************************************************/
580 static int Demux( demux_t *p_demux )
582 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
583 playlist_t *p_playlist;
585 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
588 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
590 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
591 PLAYLIST_APPEND, PLAYLIST_END );
593 vlc_object_release( p_playlist );
594 if( p_sdp ) FreeSDP( p_sdp );
599 static int Control( demux_t *p_demux, int i_query, va_list args )
604 /**************************************************************
606 **************************************************************/
608 /* i_read is at least > 6 */
609 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
611 int i_version, i_address_type, i_hash, i;
613 uint8_t *psz_initial_sdp;
615 vlc_bool_t b_compressed;
616 vlc_bool_t b_need_delete = VLC_FALSE;
618 int i_decompressed_size;
619 uint8_t *p_decompressed_buffer;
623 /* First, check the sap announce is correct */
624 i_version = p_buffer[0] >> 5;
627 msg_Dbg( p_sd, "strange sap version %d found", i_version );
630 i_address_type = p_buffer[0] & 0x10;
632 if( (p_buffer[0] & 0x08) != 0 )
634 msg_Dbg( p_sd, "reserved bit incorrectly set" );
638 if( (p_buffer[0] & 0x04) != 0 )
640 msg_Dbg( p_sd, "session deletion packet" );
641 b_need_delete = VLC_TRUE;
644 if( p_buffer[0] & 0x02 )
646 msg_Dbg( p_sd, "encrypted packet, unsupported" );
650 b_compressed = p_buffer[0] & 0x01;
652 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
654 if( p_sd->p_sys->b_strict && i_hash == 0 )
656 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
660 psz_sdp = &p_buffer[4];
661 psz_initial_sdp = psz_sdp;
663 if( i_address_type == 0 ) /* ipv4 source address */
668 msg_Warn( p_sd, "too short SAP packet\n" );
672 else /* ipv6 source address */
677 msg_Warn( p_sd, "too short SAP packet\n" );
685 i_decompressed_size = Decompress( psz_sdp,
686 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
687 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
689 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
690 psz_sdp[i_decompressed_size] = '\0';
691 free( p_decompressed_buffer );
694 msg_Warn( p_sd, "Ignoring compressed sap packet" );
699 /* Add the size of authentification info */
700 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
702 msg_Warn( p_sd, "too short SAP packet\n");
705 psz_sdp += p_buffer[1];
708 /* Skip payload type */
709 /* Handle announces without \0 between SAP and SDP */
710 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
712 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
714 msg_Warn( p_sd, "empty SDP ?");
719 if( *psz_sdp == '\0' )
723 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
725 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
727 if( psz_sdp -p_buffer >= i_read )
729 msg_Warn( p_sd, "package without content" );
734 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
741 /* Decide whether we should add a playlist item for this SDP */
742 /* Parse connection information (c= & m= ) */
743 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
745 p_sdp->psz_uri = NULL;
748 /* Multi-media or no-parse -> pass to LIVE.COM */
749 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
750 p_sdp->i_media_type != 32 &&
751 p_sdp->i_media_type != 33) ||
752 p_sd->p_sys->b_parse == VLC_FALSE )
754 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
755 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
758 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
760 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
763 /* FIXME: we create a new announce each time the sdp changes */
764 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
768 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
773 p_sd->p_sys->pp_announces[i]->i_last = mdate();
780 if( p_sdp->i_media > 1 )
782 msg_Dbg( p_sd, "passing to LIVE.COM" );
785 CreateAnnounce( p_sd, i_hash, p_sdp );
790 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
793 playlist_t *p_playlist;
794 playlist_item_t *p_item, *p_child;
796 sap_announce_t *p_sap = (sap_announce_t *)malloc(
797 sizeof(sap_announce_t ) );
799 psz_value = convert_from_utf8( p_sd, p_sdp->psz_sessionname );
800 if( p_sap == NULL || psz_value == NULL )
802 msg_Err( p_sd, "out of memory");
805 p_sd->b_die = VLC_TRUE;
808 p_sap->i_last = mdate();
809 p_sap->i_hash = i_hash;
810 p_sap->p_sdp = p_sdp;
811 p_sap->i_item_id = -1;
813 /* Create the playlist item here */
814 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, psz_value );
823 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
824 if( psz_value != NULL )
826 vlc_input_item_AddInfo( &p_item->input, _("Session"),
827 _("Tool"), psz_value );
829 if( strcmp( p_sdp->psz_username, "-" ) )
831 vlc_input_item_AddInfo( &p_item->input, _("Session"),
832 _("User"), p_sdp->psz_username );
835 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
837 if( psz_value == NULL )
839 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
842 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
846 msg_Err( p_sd, "playlist not found" );
851 if( psz_value != NULL )
853 char *psz_grp = convert_from_utf8( p_sd, psz_value );
855 if( psz_grp != NULL )
857 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node,
860 if( p_child == NULL )
861 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
862 psz_grp, p_sd->p_sys->p_node );
867 vlc_object_release( p_playlist );
868 msg_Err( p_sd, "out of memory");
875 p_child = p_sd->p_sys->p_node;
878 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
879 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
881 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
882 PLAYLIST_APPEND, PLAYLIST_END );
884 vlc_object_release( p_playlist );
886 p_sap->i_item_id = p_item->input.i_id;
888 TAB_APPEND( p_sd->p_sys->i_announces,
889 p_sd->p_sys->pp_announces, p_sap );
894 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
898 for( i = 0 ; i< p_sdp->i_attributes; i++ )
900 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
901 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
903 return p_sdp->pp_attributes[i]->psz_value;
910 /* Fill p_sdp->psz_uri */
911 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
915 char *psz_uri = NULL;
916 char *psz_proto = NULL;
920 if( p_sdp->psz_connection )
922 psz_parse = p_sdp->psz_connection;
924 psz_eof = strchr( psz_parse, ' ' );
929 psz_parse = psz_eof + 1;
933 msg_Warn( p_obj, "unable to parse c field (1)");
937 psz_eof = strchr( psz_parse, ' ' );
942 if( !strncmp( psz_parse, "IP4", 3 ) )
946 else if( !strncmp( psz_parse, "IP6", 3 ) )
954 psz_parse = psz_eof + 1;
958 msg_Warn( p_obj, "unable to parse c field (2)");
962 psz_eof = strchr( psz_parse, '/' );
970 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
972 psz_uri = strdup( psz_parse );
977 if( p_sdp->psz_media )
979 psz_parse = p_sdp->psz_media;
981 psz_eof = strchr( psz_parse, ' ' );
987 if( strncmp( psz_parse, "audio", 5 ) &&
988 strncmp( psz_parse, "video",5 ) )
990 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
995 psz_parse = psz_eof + 1;
999 msg_Warn( p_obj, "unable to parse m field (1)");
1001 return VLC_EGENERIC;
1004 psz_eof = strchr( psz_parse, ' ' );
1010 /* FIXME : multiple port ! */
1011 i_port = atoi( psz_parse );
1013 if( i_port <= 0 || i_port >= 65536 )
1015 msg_Warn( p_obj, "invalid transport port %i", i_port );
1018 psz_parse = psz_eof + 1;
1022 msg_Warn( p_obj, "unable to parse m field (2)");
1024 return VLC_EGENERIC;
1027 psz_eof = strchr( psz_parse, ' ' );
1032 psz_proto = strdup( psz_parse );
1034 psz_parse = psz_eof + 1;
1035 p_sdp->i_media_type = atoi( psz_parse );
1040 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1041 p_sdp->i_media_type = 33;
1042 psz_proto = strdup( psz_parse );
1046 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1049 psz_proto = strdup( "rtp" );
1051 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1054 psz_proto = strdup( "udp" );
1057 /* FIXME: HTTP support */
1064 if( ismult( psz_uri ) )
1066 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1070 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1077 /***********************************************************************
1078 * ParseSDP : SDP parsing
1079 * *********************************************************************
1080 * Validate SDP and parse all fields
1081 ***********************************************************************/
1082 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1085 vlc_bool_t b_invalid = VLC_FALSE;
1086 vlc_bool_t b_end = VLC_FALSE;
1087 if( psz_sdp == NULL )
1092 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1094 msg_Warn( p_obj, "Bad packet" );
1098 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1100 p_sdp->psz_sdp = strdup( psz_sdp );
1102 p_sdp->psz_sessionname = NULL;
1103 p_sdp->psz_media = NULL;
1104 p_sdp->psz_connection = NULL;
1105 p_sdp->psz_uri = NULL;
1106 p_sdp->psz_address = NULL;
1107 p_sdp->psz_address_type= NULL;
1110 p_sdp->i_attributes = 0;
1111 p_sdp->pp_attributes = NULL;
1113 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1120 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1121 *psz_sdp == ' ' || *psz_sdp == '\t' )
1126 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1128 psz_eol = psz_sdp + strlen( psz_sdp );
1131 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1136 if( psz_eol <= psz_sdp )
1142 /* no space allowed between fields */
1143 if( psz_sdp[1] != '=' )
1145 msg_Warn( p_obj, "invalid packet" ) ;
1150 /* Now parse each line */
1151 switch( psz_sdp[0] )
1156 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1161 /* o field is <username> <session id> <version>
1162 * <network type> <address type> <address> */
1164 #define GET_FIELD( store ) \
1165 psz_eof = strchr( psz_parse, ' ' ); \
1168 *psz_eof=0; store = strdup( psz_parse ); \
1172 if( i_field != 5 ) \
1174 b_invalid = VLC_TRUE; break; \
1178 store = strdup( psz_parse ); \
1181 psz_parse = psz_eof + 1; i_field++;
1184 psz_parse = &psz_sdp[2];
1185 GET_FIELD( p_sdp->psz_username );
1186 GET_FIELD( psz_sess_id );
1188 p_sdp->i_session_id = atoll( psz_sess_id );
1190 FREE( psz_sess_id );
1192 GET_FIELD( psz_sess_id );
1193 FREE( psz_sess_id );
1195 GET_FIELD( p_sdp->psz_network_type );
1196 GET_FIELD( p_sdp->psz_address_type );
1197 GET_FIELD( p_sdp->psz_address );
1208 case( 'a' ): /* attribute */
1210 char *psz_eon = strchr( &psz_sdp[2], ':' );
1211 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1213 /* Attribute with value */
1218 p_attr->psz_field = strdup( &psz_sdp[2] );
1219 p_attr->psz_value = strdup( psz_eon );
1221 else /* Attribute without value */
1223 p_attr->psz_field = strdup( &psz_sdp[2] );
1224 p_attr->psz_value = NULL;
1227 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1231 case( 'm' ): /* Media announcement */
1233 /* If we have several medias, we pass the announcement to
1234 * LIVE.COM, so just count them */
1236 if( p_sdp->i_media == 1 )
1238 p_sdp->psz_media = strdup( &psz_sdp[2] );
1245 if( p_sdp->i_media > 1 )
1248 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1269 static char *convert_from_utf8( struct services_discovery_t *p_sd,
1272 char *psz_local, *psz_in, *psz_out;
1273 size_t ret, i_in, i_out;
1275 if( psz_unicode == NULL )
1277 if ( p_sd->p_sys->iconvHandle == (vlc_iconv_t)(-1) )
1278 return strdup( psz_unicode );
1280 psz_in = psz_unicode;
1281 i_in = strlen( psz_unicode );
1284 psz_local = malloc( i_out + 1 );
1285 if( psz_local == NULL )
1286 return strdup( psz_unicode );
1287 psz_out = psz_local;
1289 ret = vlc_iconv( p_sd->p_sys->iconvHandle,
1290 &psz_in, &i_in, &psz_out, &i_out);
1291 if( ret == (size_t)(-1) || i_in )
1293 msg_Warn( p_sd, "Failed to convert \"%s\" from UTF-8", psz_unicode );
1295 return strdup( psz_unicode );
1302 /***********************************************************************
1303 * ismult: returns true if we have a multicast address
1304 ***********************************************************************/
1305 static int ismult( char *psz_uri )
1310 i_value = strtol( psz_uri, &psz_end, 0 );
1313 if( psz_uri[0] == '[')
1315 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1316 strncasecmp( &psz_uri[2], "FF0" , 3))
1319 return( VLC_FALSE );
1322 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1324 return( i_value < 224 ? VLC_FALSE : VLC_TRUE );
1327 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1330 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1334 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1335 p_sd->p_sys->i_fd, i_fd );
1339 return VLC_EGENERIC;
1343 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1345 int i_result, i_dstsize, n;
1346 unsigned char *psz_dst;
1349 d_stream.zalloc = (alloc_func)0;
1350 d_stream.zfree = (free_func)0;
1351 d_stream.opaque = (voidpf)0;
1353 i_result = inflateInit(&d_stream);
1354 if( i_result != Z_OK )
1356 printf( "inflateInit() failed. Result: %d\n", i_result );
1360 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1361 i_position = p_playlist->i_index;
1363 /* Gather the complete sdp file */
1366 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1368 d_stream.next_in = (Bytef *)psz_src;
1369 d_stream.avail_in = i_len;
1377 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1378 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1379 d_stream.avail_out = 1000;
1381 i_result = inflate(&d_stream, Z_NO_FLUSH);
1382 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1384 printf( "Zlib decompression failed. Result: %d\n", i_result );
1388 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1389 ( i_result != Z_STREAM_END ) );
1391 i_dstsize = d_stream.total_out;
1392 inflateEnd( &d_stream );
1394 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1401 static void FreeSDP( sdp_t *p_sdp )
1404 FREE( p_sdp->psz_sdp );
1405 FREE( p_sdp->psz_sessionname );
1406 FREE( p_sdp->psz_connection );
1407 FREE( p_sdp->psz_media );
1408 FREE( p_sdp->psz_uri );
1409 FREE( p_sdp->psz_username );
1410 FREE( p_sdp->psz_network_type );
1412 FREE( p_sdp->psz_address );
1413 FREE( p_sdp->psz_address_type );
1415 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1417 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1418 FREE( p_sdp->pp_attributes[i]->psz_field );
1419 FREE( p_sdp->pp_attributes[i]->psz_value );
1420 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1426 static int RemoveAnnounce( services_discovery_t *p_sd,
1427 sap_announce_t *p_announce )
1430 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1431 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1433 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1438 return VLC_EGENERIC;
1441 if( p_announce->i_item_id > -1 )
1443 playlist_LockDelete( p_playlist, p_announce->i_item_id );
1446 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1448 if( p_sd->p_sys->pp_announces[i] == p_announce )
1450 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1456 vlc_object_release( p_playlist );
1463 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1465 /* A session is identified by
1466 * username, session_id, network type, address type and address */
1467 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1468 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1469 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1470 p_sdp1->psz_address && p_sdp2->psz_address )
1472 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1473 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1474 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1475 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1476 p_sdp1->i_session_id == p_sdp2->i_session_id )
1492 static void CacheLoad( services_discovery_t *p_sd )
1494 msg_Warn( p_sd, "Cache not implemented") ;
1497 static void CacheSave( services_discovery_t *p_sd )
1499 msg_Warn( p_sd, "Cache not implemented") ;