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>
43 #ifdef HAVE_SYS_TIME_H
44 # include <sys/time.h>
51 /************************************************************************
52 * Macros and definitions
53 ************************************************************************/
55 #define MAX_LINE_LENGTH 256
57 /* SAP is always on that port */
59 /* Global-scope SAP address */
60 #define SAP_V4_GLOBAL_ADDRESS "224.2.127.254"
61 /* Organization-local SAP address */
62 #define SAP_V4_ORG_ADDRESS "239.195.255.255"
63 /* Local (smallest non-link-local scope) SAP address */
64 #define SAP_V4_LOCAL_ADDRESS "239.255.255.255"
65 /* Link-local SAP address */
66 #define SAP_V4_LINK_ADDRESS "224.0.0.255"
69 #define IPV6_ADDR_1 "FF0" /* Scope is inserted between them */
70 #define IPV6_ADDR_2 "::2:7FFE"
73 /*****************************************************************************
75 *****************************************************************************/
76 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
77 #define SAP_ADDR_LONGTEXT N_( "Listen for SAP announces on another address" )
78 #define SAP_IPV4_TEXT N_( "IPv4-SAP listening" )
79 #define SAP_IPV4_LONGTEXT N_( \
80 "Set this if you want the SAP module to listen to IPv4 announces " \
81 "on the standard address" )
82 #define SAP_IPV6_TEXT N_( "IPv6-SAP listening" )
83 #define SAP_IPV6_LONGTEXT N_( \
84 "Set this if you want the SAP module to listen to IPv6 announces " \
85 "on the standard address" )
86 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
87 #define SAP_SCOPE_LONGTEXT N_( \
88 "Sets the scope for IPv6 announces (default is 8)" )
89 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
90 #define SAP_TIMEOUT_LONGTEXT N_( \
91 "Sets the time before SAP items get deleted if no new announce " \
93 #define SAP_PARSE_TEXT N_( "Try to parse the SAP" )
94 #define SAP_PARSE_LONGTEXT N_( \
95 "When SAP can it will try to parse the SAP. If you don't select " \
96 "this, all announces will be parsed by the livedotcom module" )
97 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
98 #define SAP_STRICT_LONGTEXT N_( \
99 "When this is set, the SAP parser will discard some non-compliant " \
101 #define SAP_CACHE_TEXT N_("Use SAP cache")
102 #define SAP_CACHE_LONGTEXT N_( \
103 "If this option is selected, a SAP caching mechanism will be used." \
104 "This will result in lower SAP startup time, but you could end up " \
105 "with items corresponding to legacy streams." )
108 static int Open ( vlc_object_t * );
109 static void Close( vlc_object_t * );
110 static int OpenDemux ( vlc_object_t * );
111 static void CloseDemux ( vlc_object_t * );
114 set_shortname( _("SAP"));
115 set_description( _("SAP announces") );
116 set_category( CAT_PLAYLIST );
117 set_subcategory( SUBCAT_PLAYLIST_SD );
119 add_string( "sap-addr", NULL, NULL,
120 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
121 add_bool( "sap-ipv4", 1 , NULL,
122 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
123 add_bool( "sap-ipv6", 0 , NULL,
124 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
125 add_string( "sap-ipv6-scope", "8" , NULL,
126 SAP_SCOPE_TEXT, SAP_SCOPE_LONGTEXT, VLC_TRUE);
127 add_integer( "sap-timeout", 1800, NULL,
128 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
129 add_bool( "sap-parse", 1 , NULL,
130 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
131 add_bool( "sap-strict", 0 , NULL,
132 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
133 add_bool( "sap-cache", 0 , NULL,
134 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
136 set_capability( "services_discovery", 0 );
137 set_callbacks( Open, Close );
140 set_description( _("SDP file parser for UDP") );
141 add_shortcut( "sdp" );
142 set_capability( "demux2", 51 );
143 set_callbacks( OpenDemux, CloseDemux );
147 /*****************************************************************************
149 *****************************************************************************/
151 typedef struct sdp_t sdp_t;
152 typedef struct attribute_t attribute_t;
153 typedef struct sap_announce_t sap_announce_t;
155 /* The structure that contains sdp information */
161 char *psz_sessionname;
163 /* Raw m= and c= fields */
164 char *psz_connection;
169 char *psz_network_type;
170 char *psz_address_type;
172 int64_t i_session_id;
177 int i_in; /* IP version */
183 attribute_t **pp_attributes;
192 struct sap_announce_t
197 uint32_t i_source[4];
199 /* SAP annnounces must only contain one SDP */
203 // playlist_item_t *p_item;
206 struct services_discovery_sys_t
208 /* Socket descriptors */
213 playlist_item_t *p_node;
215 /* charset conversion */
216 vlc_iconv_t iconvHandle;
218 /* Table of announces */
220 struct sap_announce_t **pp_announces;
234 /*****************************************************************************
236 *****************************************************************************/
240 static int Demux( demux_t *p_demux );
241 static int Control( demux_t *, int, va_list );
242 static void Run ( services_discovery_t *p_sd );
244 /* Main parsing functions */
245 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
246 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
247 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
248 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
249 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
252 static void CacheLoad( services_discovery_t *p_sd );
253 static void CacheSave( services_discovery_t *p_sd );
254 /* Helper functions */
255 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
256 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
257 static char *convert_from_utf8( struct services_discovery_t *p_sd,
259 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
261 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
263 static void FreeSDP( sdp_t *p_sdp );
265 /* Detect multicast addresses */
266 static vlc_bool_t ismult( char * );
269 if( p ) { free( p ); (p) = NULL; }
270 /*****************************************************************************
271 * Open: initialize and create stuff
272 *****************************************************************************/
273 static int Open( vlc_object_t *p_this )
275 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
276 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
277 malloc( sizeof( services_discovery_sys_t ) );
279 playlist_t *p_playlist;
280 playlist_view_t *p_view;
281 char *psz_addr, *psz_charset;
284 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
286 vlc_current_charset( &psz_charset );
287 p_sys->iconvHandle = vlc_iconv_open( psz_charset, "UTF-8" );
289 if( p_sys->iconvHandle == (vlc_iconv_t)(-1) )
291 msg_Err( p_sd, "unable to perform characters conversion" );
301 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
302 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
304 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
309 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
311 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
312 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
313 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
314 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
316 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
318 /* [ + 8x4+7*':' + ] */
319 char psz_address[42];
321 char *psz_scope = var_CreateGetString( p_sd, "sap-ipv6-scope" );
323 if( psz_scope == NULL || *psz_scope == '\0')
329 c_scope = psz_scope[0];
331 snprintf( psz_address, 42, "[%s%c%s]", IPV6_ADDR_1, c_scope,
333 InitSocket( p_sd, psz_address, SAP_PORT );
336 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
337 if( psz_addr && *psz_addr )
339 InitSocket( p_sd, psz_addr, SAP_PORT );
342 if( p_sys->i_fd == 0 )
344 msg_Err( p_sd, "unable to read on any address" );
348 /* Create our playlist node */
349 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
353 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
357 p_view = playlist_ViewFind( p_playlist, VIEW_CATEGORY );
358 p_sys->p_node = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
359 _("SAP"), p_view->p_root );
360 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
361 p_sys->p_node->i_flags =~ PLAYLIST_SKIP_FLAG;
362 val.b_bool = VLC_TRUE;
363 var_Set( p_playlist, "intf-change", val );
365 vlc_object_release( p_playlist );
367 p_sys->i_announces = 0;
368 p_sys->pp_announces = NULL;
373 /*****************************************************************************
374 * OpenDemux: initialize and create stuff
375 *****************************************************************************/
376 static int OpenDemux( vlc_object_t *p_this )
378 demux_t *p_demux = (demux_t *)p_this;
380 int i_max_sdp = 1024;
382 char *psz_sdp = NULL;
388 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
390 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
391 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
392 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
398 psz_sdp = (char *)malloc( i_max_sdp );
399 if( !psz_sdp ) return VLC_EGENERIC;
401 /* Gather the complete sdp file */
404 int i_read = stream_Read( p_demux->s,
405 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
409 msg_Err( p_demux, "failed to read SDP" );
415 if( i_read < i_max_sdp - i_sdp - 1 )
417 psz_sdp[i_sdp] = '\0';
422 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
425 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
429 msg_Warn( p_demux, "invalid SDP");
433 if( p_sdp->i_media > 1 )
438 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
440 p_sdp->psz_uri = NULL;
442 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
443 p_sdp->i_media_type != 14 )
446 if( p_sdp->psz_uri == NULL ) goto error;
448 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
449 p_demux->p_sys->p_sdp = p_sdp;
450 p_demux->pf_control = Control;
451 p_demux->pf_demux = Demux;
458 if( p_sdp ) FreeSDP( p_sdp );
459 stream_Seek( p_demux->s, 0 );
463 /*****************************************************************************
465 *****************************************************************************/
466 static void Close( vlc_object_t *p_this )
468 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
469 services_discovery_sys_t *p_sys = p_sd->p_sys;
471 playlist_t *p_playlist;
474 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
476 net_Close( p_sys->pi_fd[i] );
478 FREE( p_sys->pi_fd );
480 if( config_GetInt( p_sd, "sap-cache" ) )
485 for( i = p_sys->i_announces - 1; i>= 0; i-- )
487 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
489 FREE( p_sys->pp_announces );
491 p_playlist = (playlist_t *) vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
496 playlist_NodeDelete( p_playlist, p_sys->p_node, VLC_TRUE , VLC_TRUE );
497 vlc_object_release( p_playlist );
500 vlc_iconv_close( p_sys->iconvHandle );
505 /*****************************************************************************
506 * CloseDemux: Close the demuxer
507 *****************************************************************************/
508 static void CloseDemux( vlc_object_t *p_this )
513 /*****************************************************************************
514 * Run: main SAP thread
515 *****************************************************************************
516 * Listens to SAP packets, and sends them to packet_handle
517 *****************************************************************************/
518 #define MAX_SAP_BUFFER 5000
520 static void Run( services_discovery_t *p_sd )
523 playlist_t *p_playlist;
525 /* read SAP packets */
526 while( !p_sd->b_die )
529 uint8_t p_buffer[MAX_SAP_BUFFER];
531 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
532 p_sd->p_sys->i_fd, p_buffer,
533 MAX_SAP_BUFFER, 500000 );
535 /* Check for items that need deletion */
536 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
538 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
540 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
542 struct sap_announce_t *p_announce;
543 playlist_item_t * p_item;
544 p_announce = p_sd->p_sys->pp_announces[i];
546 /* Remove the playlist item */
547 p_playlist = vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
551 p_item = playlist_ItemGetById( p_playlist,
552 p_announce->i_item_id );
553 if( !p_item ) continue;
555 msg_Dbg( p_sd, "Time out for %s, deleting (%i/%i)",
556 p_item->input.psz_name,
557 i , p_sd->p_sys->i_announces );
559 playlist_Delete( p_playlist, p_announce->i_item_id );
560 vlc_object_release( p_playlist );
563 /* Remove the sap_announce from the array */
564 REMOVE_ELEM( p_sd->p_sys->pp_announces,
565 p_sd->p_sys->i_announces, i );
571 /* Minimum length is > 6 */
576 msg_Warn( p_sd, "socket read error" );
581 p_buffer[i_read] = '\0';
583 /* Parse the packet */
584 ParseSAP( p_sd, p_buffer, i_read );
588 /**********************************************************************
589 * Demux: reads and demuxes data packets
590 * Return -1 if error, 0 if EOF, 1 else
591 **********************************************************************/
592 static int Demux( demux_t *p_demux )
594 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
595 playlist_t *p_playlist;
597 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
600 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
602 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
603 PLAYLIST_APPEND, PLAYLIST_END );
605 vlc_object_release( p_playlist );
606 if( p_sdp ) FreeSDP( p_sdp );
611 static int Control( demux_t *p_demux, int i_query, va_list args )
616 /**************************************************************
618 **************************************************************/
620 /* i_read is at least > 6 */
621 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
623 int i_version, i_address_type, i_hash, i;
625 uint8_t *psz_initial_sdp;
627 vlc_bool_t b_compressed;
628 vlc_bool_t b_need_delete = VLC_FALSE;
630 int i_decompressed_size;
631 uint8_t *p_decompressed_buffer;
635 /* First, check the sap announce is correct */
636 i_version = p_buffer[0] >> 5;
639 msg_Dbg( p_sd, "strange sap version %d found", i_version );
642 i_address_type = p_buffer[0] & 0x10;
644 if( (p_buffer[0] & 0x08) != 0 )
646 msg_Dbg( p_sd, "reserved bit incorrectly set" );
650 if( (p_buffer[0] & 0x04) != 0 )
652 msg_Dbg( p_sd, "session deletion packet" );
653 b_need_delete = VLC_TRUE;
656 if( p_buffer[0] & 0x02 )
658 msg_Dbg( p_sd, "encrypted packet, unsupported" );
662 b_compressed = p_buffer[0] & 0x01;
664 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
666 if( p_sd->p_sys->b_strict && i_hash == 0 )
668 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
672 psz_sdp = &p_buffer[4];
673 psz_initial_sdp = psz_sdp;
675 if( i_address_type == 0 ) /* ipv4 source address */
680 msg_Warn( p_sd, "too short SAP packet\n" );
684 else /* ipv6 source address */
689 msg_Warn( p_sd, "too short SAP packet\n" );
697 i_decompressed_size = Decompress( psz_sdp,
698 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
699 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
701 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
702 psz_sdp[i_decompressed_size] = '\0';
703 free( p_decompressed_buffer );
706 msg_Warn( p_sd, "Ignoring compressed sap packet" );
711 /* Add the size of authentification info */
712 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
714 msg_Warn( p_sd, "too short SAP packet\n");
717 psz_sdp += p_buffer[1];
720 /* Skip payload type */
721 /* Handle announces without \0 between SAP and SDP */
722 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
724 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
726 msg_Warn( p_sd, "empty SDP ?");
731 if( *psz_sdp == '\0' )
735 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
737 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
739 if( psz_sdp -p_buffer >= i_read )
741 msg_Warn( p_sd, "package without content" );
746 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
753 /* Decide whether we should add a playlist item for this SDP */
754 /* Parse connection information (c= & m= ) */
755 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
757 p_sdp->psz_uri = NULL;
760 /* Multi-media or no-parse -> pass to LIVE.COM */
761 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
762 p_sdp->i_media_type != 32 &&
763 p_sdp->i_media_type != 33) ||
764 p_sd->p_sys->b_parse == VLC_FALSE )
766 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
767 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
770 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
772 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
775 /* FIXME: we create a new announce each time the sdp changes */
776 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
780 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
785 p_sd->p_sys->pp_announces[i]->i_last = mdate();
792 if( p_sdp->i_media > 1 )
794 msg_Dbg( p_sd, "passing to LIVE.COM" );
797 CreateAnnounce( p_sd, i_hash, p_sdp );
802 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
805 playlist_t *p_playlist;
806 playlist_item_t *p_item, *p_child;
808 sap_announce_t *p_sap = (sap_announce_t *)malloc(
809 sizeof(sap_announce_t ) );
811 psz_value = convert_from_utf8( p_sd, p_sdp->psz_sessionname );
812 if( p_sap == NULL || psz_value == NULL )
818 p_sap->i_last = mdate();
819 p_sap->i_hash = i_hash;
820 p_sap->p_sdp = p_sdp;
821 p_sap->i_item_id = -1;
823 /* Create the playlist item here */
824 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, psz_value );
833 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
834 if( psz_value != NULL )
836 vlc_input_item_AddInfo( &p_item->input, _("Session"),
837 _("Tool"), psz_value );
839 if( strcmp( p_sdp->psz_username, "-" ) )
841 vlc_input_item_AddInfo( &p_item->input, _("Session"),
842 _("User"), p_sdp->psz_username );
845 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
847 if( psz_value == NULL )
849 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
852 p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
856 msg_Err( p_sd, "playlist not found" );
861 if( psz_value != NULL )
863 char *psz_grp = convert_from_utf8( p_sd, psz_value );
865 if( psz_grp != NULL )
867 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node,
870 if( p_child == NULL )
872 p_child = playlist_NodeCreate( p_playlist, VIEW_CATEGORY,
873 psz_grp, p_sd->p_sys->p_node );
874 p_child->i_flags =~ PLAYLIST_SKIP_FLAG;
880 vlc_object_release( p_playlist );
881 msg_Err( p_sd, "out of memory");
888 p_child = p_sd->p_sys->p_node;
891 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
892 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
894 playlist_NodeAddItem( p_playlist, p_item, VIEW_CATEGORY, p_child,
895 PLAYLIST_APPEND, PLAYLIST_END );
897 vlc_object_release( p_playlist );
899 p_sap->i_item_id = p_item->input.i_id;
901 TAB_APPEND( p_sd->p_sys->i_announces,
902 p_sd->p_sys->pp_announces, p_sap );
907 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
911 for( i = 0 ; i< p_sdp->i_attributes; i++ )
913 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
914 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
916 return p_sdp->pp_attributes[i]->psz_value;
923 /* Fill p_sdp->psz_uri */
924 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
928 char *psz_uri = NULL;
929 char *psz_proto = NULL;
933 if( p_sdp->psz_connection )
935 psz_parse = p_sdp->psz_connection;
937 psz_eof = strchr( psz_parse, ' ' );
942 psz_parse = psz_eof + 1;
946 msg_Warn( p_obj, "unable to parse c field (1)");
950 psz_eof = strchr( psz_parse, ' ' );
955 if( !strncmp( psz_parse, "IP4", 3 ) )
959 else if( !strncmp( psz_parse, "IP6", 3 ) )
967 psz_parse = psz_eof + 1;
971 msg_Warn( p_obj, "unable to parse c field (2)");
975 psz_eof = strchr( psz_parse, '/' );
983 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
985 psz_uri = strdup( psz_parse );
990 if( p_sdp->psz_media )
992 psz_parse = p_sdp->psz_media;
994 psz_eof = strchr( psz_parse, ' ' );
1000 if( strncmp( psz_parse, "audio", 5 ) &&
1001 strncmp( psz_parse, "video",5 ) )
1003 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
1005 return VLC_EGENERIC;
1008 psz_parse = psz_eof + 1;
1012 msg_Warn( p_obj, "unable to parse m field (1)");
1014 return VLC_EGENERIC;
1017 psz_eof = strchr( psz_parse, ' ' );
1023 /* FIXME : multiple port ! */
1024 i_port = atoi( psz_parse );
1026 if( i_port <= 0 || i_port >= 65536 )
1028 msg_Warn( p_obj, "invalid transport port %i", i_port );
1031 psz_parse = psz_eof + 1;
1035 msg_Warn( p_obj, "unable to parse m field (2)");
1037 return VLC_EGENERIC;
1040 psz_eof = strchr( psz_parse, ' ' );
1045 psz_proto = strdup( psz_parse );
1047 psz_parse = psz_eof + 1;
1048 p_sdp->i_media_type = atoi( psz_parse );
1053 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1054 p_sdp->i_media_type = 33;
1055 psz_proto = strdup( psz_parse );
1059 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1062 psz_proto = strdup( "rtp" );
1064 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1067 psz_proto = strdup( "udp" );
1070 /* FIXME: HTTP support */
1077 if( ismult( psz_uri ) )
1079 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1083 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1090 /***********************************************************************
1091 * ParseSDP : SDP parsing
1092 * *********************************************************************
1093 * Validate SDP and parse all fields
1094 ***********************************************************************/
1095 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1098 vlc_bool_t b_invalid = VLC_FALSE;
1099 vlc_bool_t b_end = VLC_FALSE;
1100 if( psz_sdp == NULL )
1105 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1107 msg_Warn( p_obj, "Bad packet" );
1111 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1113 p_sdp->psz_sdp = strdup( psz_sdp );
1115 p_sdp->psz_sessionname = NULL;
1116 p_sdp->psz_media = NULL;
1117 p_sdp->psz_connection = NULL;
1118 p_sdp->psz_uri = NULL;
1119 p_sdp->psz_address = NULL;
1120 p_sdp->psz_address_type= NULL;
1123 p_sdp->i_attributes = 0;
1124 p_sdp->pp_attributes = NULL;
1126 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1133 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1134 *psz_sdp == ' ' || *psz_sdp == '\t' )
1139 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1141 psz_eol = psz_sdp + strlen( psz_sdp );
1144 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1149 if( psz_eol <= psz_sdp )
1155 /* no space allowed between fields */
1156 if( psz_sdp[1] != '=' )
1158 msg_Warn( p_obj, "invalid packet" ) ;
1163 /* Now parse each line */
1164 switch( psz_sdp[0] )
1169 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1174 /* o field is <username> <session id> <version>
1175 * <network type> <address type> <address> */
1177 #define GET_FIELD( store ) \
1178 psz_eof = strchr( psz_parse, ' ' ); \
1181 *psz_eof=0; store = strdup( psz_parse ); \
1185 if( i_field != 5 ) \
1187 b_invalid = VLC_TRUE; break; \
1191 store = strdup( psz_parse ); \
1194 psz_parse = psz_eof + 1; i_field++;
1197 psz_parse = &psz_sdp[2];
1198 GET_FIELD( p_sdp->psz_username );
1199 GET_FIELD( psz_sess_id );
1201 p_sdp->i_session_id = atoll( psz_sess_id );
1203 FREE( psz_sess_id );
1205 GET_FIELD( psz_sess_id );
1206 FREE( psz_sess_id );
1208 GET_FIELD( p_sdp->psz_network_type );
1209 GET_FIELD( p_sdp->psz_address_type );
1210 GET_FIELD( p_sdp->psz_address );
1221 case( 'a' ): /* attribute */
1223 char *psz_eon = strchr( &psz_sdp[2], ':' );
1224 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1226 /* Attribute with value */
1231 p_attr->psz_field = strdup( &psz_sdp[2] );
1232 p_attr->psz_value = strdup( psz_eon );
1234 else /* Attribute without value */
1236 p_attr->psz_field = strdup( &psz_sdp[2] );
1237 p_attr->psz_value = NULL;
1240 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1244 case( 'm' ): /* Media announcement */
1246 /* If we have several medias, we pass the announcement to
1247 * LIVE.COM, so just count them */
1249 if( p_sdp->i_media == 1 )
1251 p_sdp->psz_media = strdup( &psz_sdp[2] );
1258 if( p_sdp->i_media > 1 )
1261 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1282 static char *convert_from_utf8( struct services_discovery_t *p_sd,
1285 char *psz_local, *psz_in, *psz_out;
1286 size_t ret, i_in, i_out;
1287 vlc_bool_t b_warn = VLC_FALSE;
1289 if( psz_unicode == NULL )
1292 psz_in = psz_unicode;
1293 i_in = strlen( psz_unicode );
1298 i_out = MB_CUR_MAX * i_in;
1300 psz_local = malloc( i_out + 1 );
1301 if( psz_local == NULL )
1303 psz_out = psz_local;
1307 ret = vlc_iconv( p_sd->p_sys->iconvHandle,
1308 &psz_in, &i_in, &psz_out, &i_out);
1315 if( ret == (size_t)(-1) )
1317 msg_Err( p_sd, "character conversion failure : %s",
1318 strerror( errno ) );
1326 msg_Warn( p_sd, "in \"%s\" : %s", psz_unicode,
1327 strerror( errno ) );
1334 /***********************************************************************
1335 * ismult: returns true if we have a multicast address
1336 ***********************************************************************/
1337 static vlc_bool_t ismult( char *psz_uri )
1343 if( psz_uri[0] == '[')
1345 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1346 ( !isalnum( psz_uri[1]) && strncasecmp( &psz_uri[2], "FF0" , 3) ) )
1349 return( VLC_FALSE );
1352 i_value = strtol( psz_uri, &psz_end, 0 );
1354 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1356 return ( ( i_value < 224 ) || ( i_value >= 240 ) ) ? VLC_FALSE : VLC_TRUE;
1359 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1362 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1366 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1367 p_sd->p_sys->i_fd, i_fd );
1371 return VLC_EGENERIC;
1375 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1377 int i_result, i_dstsize, n;
1378 unsigned char *psz_dst;
1381 d_stream.zalloc = (alloc_func)0;
1382 d_stream.zfree = (free_func)0;
1383 d_stream.opaque = (voidpf)0;
1385 i_result = inflateInit(&d_stream);
1386 if( i_result != Z_OK )
1388 printf( "inflateInit() failed. Result: %d\n", i_result );
1392 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1393 i_position = p_playlist->i_index;
1395 /* Gather the complete sdp file */
1398 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1400 d_stream.next_in = (Bytef *)psz_src;
1401 d_stream.avail_in = i_len;
1409 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1410 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1411 d_stream.avail_out = 1000;
1413 i_result = inflate(&d_stream, Z_NO_FLUSH);
1414 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1416 printf( "Zlib decompression failed. Result: %d\n", i_result );
1420 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1421 ( i_result != Z_STREAM_END ) );
1423 i_dstsize = d_stream.total_out;
1424 inflateEnd( &d_stream );
1426 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1433 static void FreeSDP( sdp_t *p_sdp )
1436 FREE( p_sdp->psz_sdp );
1437 FREE( p_sdp->psz_sessionname );
1438 FREE( p_sdp->psz_connection );
1439 FREE( p_sdp->psz_media );
1440 FREE( p_sdp->psz_uri );
1441 FREE( p_sdp->psz_username );
1442 FREE( p_sdp->psz_network_type );
1444 FREE( p_sdp->psz_address );
1445 FREE( p_sdp->psz_address_type );
1447 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1449 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1450 FREE( p_sdp->pp_attributes[i]->psz_field );
1451 FREE( p_sdp->pp_attributes[i]->psz_value );
1452 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1458 static int RemoveAnnounce( services_discovery_t *p_sd,
1459 sap_announce_t *p_announce )
1462 playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
1463 VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
1465 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1470 return VLC_EGENERIC;
1473 if( p_announce->i_item_id > -1 )
1475 playlist_LockDelete( p_playlist, p_announce->i_item_id );
1478 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1480 if( p_sd->p_sys->pp_announces[i] == p_announce )
1482 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1488 vlc_object_release( p_playlist );
1495 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1497 /* A session is identified by
1498 * username, session_id, network type, address type and address */
1499 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1500 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1501 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1502 p_sdp1->psz_address && p_sdp2->psz_address )
1504 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1505 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1506 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1507 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1508 p_sdp1->i_session_id == p_sdp2->i_session_id )
1524 static void CacheLoad( services_discovery_t *p_sd )
1526 msg_Warn( p_sd, "Cache not implemented") ;
1529 static void CacheSave( services_discovery_t *p_sd )
1531 msg_Warn( p_sd, "Cache not implemented") ;