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", 1 , 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;
214 playlist_t *p_playlist;
216 /* charset conversion */
217 vlc_iconv_t iconvHandle;
219 /* Table of announces */
221 struct sap_announce_t **pp_announces;
235 /*****************************************************************************
237 *****************************************************************************/
241 static int Demux( demux_t *p_demux );
242 static int Control( demux_t *, int, va_list );
243 static void Run ( services_discovery_t *p_sd );
245 /* Main parsing functions */
246 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
247 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
248 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
249 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
250 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
253 static void CacheLoad( services_discovery_t *p_sd );
254 static void CacheSave( services_discovery_t *p_sd );
255 /* Helper functions */
256 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
257 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
258 static char *convert_from_utf8( struct services_discovery_t *p_sd,
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 );
266 /* Detect multicast addresses */
267 static vlc_bool_t ismult( char * );
270 if( p ) { free( p ); (p) = NULL; }
271 /*****************************************************************************
272 * Open: initialize and create stuff
273 *****************************************************************************/
274 static int Open( vlc_object_t *p_this )
276 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
277 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
278 malloc( sizeof( services_discovery_sys_t ) );
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_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
352 if( !p_sys->p_playlist )
354 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
358 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
359 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
360 _("SAP"), p_view->p_root );
361 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
362 p_sys->p_node->i_flags =~ PLAYLIST_SKIP_FLAG;
363 val.b_bool = VLC_TRUE;
364 var_Set( p_sys->p_playlist, "intf-change", val );
366 p_sys->i_announces = 0;
367 p_sys->pp_announces = NULL;
372 /*****************************************************************************
373 * OpenDemux: initialize and create stuff
374 *****************************************************************************/
375 static int OpenDemux( vlc_object_t *p_this )
377 demux_t *p_demux = (demux_t *)p_this;
379 int i_max_sdp = 1024;
381 char *psz_sdp = NULL;
387 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
389 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
390 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
391 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
397 psz_sdp = (char *)malloc( i_max_sdp );
398 if( !psz_sdp ) return VLC_EGENERIC;
400 /* Gather the complete sdp file */
403 int i_read = stream_Read( p_demux->s,
404 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
408 msg_Err( p_demux, "failed to read SDP" );
414 if( i_read < i_max_sdp - i_sdp - 1 )
416 psz_sdp[i_sdp] = '\0';
421 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
424 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
428 msg_Warn( p_demux, "invalid SDP");
432 if( p_sdp->i_media > 1 )
437 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
439 p_sdp->psz_uri = NULL;
441 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
442 p_sdp->i_media_type != 14 )
445 if( p_sdp->psz_uri == NULL ) goto error;
447 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
448 p_demux->p_sys->p_sdp = p_sdp;
449 p_demux->pf_control = Control;
450 p_demux->pf_demux = Demux;
457 if( p_sdp ) FreeSDP( p_sdp );
458 stream_Seek( p_demux->s, 0 );
462 /*****************************************************************************
464 *****************************************************************************/
465 static void Close( vlc_object_t *p_this )
467 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
468 services_discovery_sys_t *p_sys = p_sd->p_sys;
472 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
474 net_Close( p_sys->pi_fd[i] );
476 FREE( p_sys->pi_fd );
478 if( config_GetInt( p_sd, "sap-cache" ) )
483 for( i = p_sys->i_announces - 1; i>= 0; i-- )
485 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
487 FREE( p_sys->pp_announces );
489 if( p_sys->p_playlist )
491 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
493 vlc_object_release( p_sys->p_playlist );
496 vlc_iconv_close( p_sys->iconvHandle );
501 /*****************************************************************************
502 * CloseDemux: Close the demuxer
503 *****************************************************************************/
504 static void CloseDemux( vlc_object_t *p_this )
509 /*****************************************************************************
510 * Run: main SAP thread
511 *****************************************************************************
512 * Listens to SAP packets, and sends them to packet_handle
513 *****************************************************************************/
514 #define MAX_SAP_BUFFER 5000
516 static void Run( services_discovery_t *p_sd )
520 /* read SAP packets */
521 while( !p_sd->b_die )
524 uint8_t p_buffer[MAX_SAP_BUFFER];
526 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
527 p_sd->p_sys->i_fd, p_buffer,
528 MAX_SAP_BUFFER, 500000 );
530 /* Check for items that need deletion */
531 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
533 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
535 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
537 struct sap_announce_t *p_announce;
538 p_announce = p_sd->p_sys->pp_announces[i];
540 /* Remove the playlist item */
541 playlist_LockDelete( p_sd->p_sys->p_playlist,
542 p_announce->i_item_id );
544 /* Remove the sap_announce from the array */
545 REMOVE_ELEM( p_sd->p_sys->pp_announces,
546 p_sd->p_sys->i_announces, i );
552 /* Minimum length is > 6 */
557 msg_Warn( p_sd, "socket read error" );
562 p_buffer[i_read] = '\0';
564 /* Parse the packet */
565 ParseSAP( p_sd, p_buffer, i_read );
569 /**********************************************************************
570 * Demux: reads and demuxes data packets
571 * Return -1 if error, 0 if EOF, 1 else
572 **********************************************************************/
573 static int Demux( demux_t *p_demux )
575 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
576 playlist_t *p_playlist;
578 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
581 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
583 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
584 PLAYLIST_APPEND, PLAYLIST_END );
586 vlc_object_release( p_playlist );
587 if( p_sdp ) FreeSDP( p_sdp );
592 static int Control( demux_t *p_demux, int i_query, va_list args )
597 /**************************************************************
599 **************************************************************/
601 /* i_read is at least > 6 */
602 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
604 int i_version, i_address_type, i_hash, i;
606 uint8_t *psz_initial_sdp;
608 vlc_bool_t b_compressed;
609 vlc_bool_t b_need_delete = VLC_FALSE;
611 int i_decompressed_size;
612 uint8_t *p_decompressed_buffer;
616 /* First, check the sap announce is correct */
617 i_version = p_buffer[0] >> 5;
620 msg_Dbg( p_sd, "strange sap version %d found", i_version );
623 i_address_type = p_buffer[0] & 0x10;
625 if( (p_buffer[0] & 0x08) != 0 )
627 msg_Dbg( p_sd, "reserved bit incorrectly set" );
631 if( (p_buffer[0] & 0x04) != 0 )
633 msg_Dbg( p_sd, "session deletion packet" );
634 b_need_delete = VLC_TRUE;
637 if( p_buffer[0] & 0x02 )
639 msg_Dbg( p_sd, "encrypted packet, unsupported" );
643 b_compressed = p_buffer[0] & 0x01;
645 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
647 if( p_sd->p_sys->b_strict && i_hash == 0 )
649 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
653 psz_sdp = &p_buffer[4];
654 psz_initial_sdp = psz_sdp;
656 if( i_address_type == 0 ) /* ipv4 source address */
661 msg_Warn( p_sd, "too short SAP packet\n" );
665 else /* ipv6 source address */
670 msg_Warn( p_sd, "too short SAP packet\n" );
678 i_decompressed_size = Decompress( psz_sdp,
679 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
680 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
682 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
683 psz_sdp[i_decompressed_size] = '\0';
684 free( p_decompressed_buffer );
687 msg_Warn( p_sd, "Ignoring compressed sap packet" );
692 /* Add the size of authentification info */
693 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
695 msg_Warn( p_sd, "too short SAP packet\n");
698 psz_sdp += p_buffer[1];
701 /* Skip payload type */
702 /* Handle announces without \0 between SAP and SDP */
703 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
705 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
707 msg_Warn( p_sd, "empty SDP ?");
712 if( *psz_sdp == '\0' )
716 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
718 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
720 if( psz_sdp -p_buffer >= i_read )
722 msg_Warn( p_sd, "package without content" );
727 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
734 /* Decide whether we should add a playlist item for this SDP */
735 /* Parse connection information (c= & m= ) */
736 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
738 p_sdp->psz_uri = NULL;
741 /* Multi-media or no-parse -> pass to LIVE.COM */
742 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
743 p_sdp->i_media_type != 32 &&
744 p_sdp->i_media_type != 33) ||
745 p_sd->p_sys->b_parse == VLC_FALSE )
747 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
748 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
751 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
753 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
756 /* FIXME: we create a new announce each time the sdp changes */
757 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
761 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
766 p_sd->p_sys->pp_announces[i]->i_last = mdate();
773 if( p_sdp->i_media > 1 )
775 msg_Dbg( p_sd, "passing to LIVE.COM" );
778 CreateAnnounce( p_sd, i_hash, p_sdp );
783 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
786 playlist_item_t *p_item, *p_child;
788 sap_announce_t *p_sap = (sap_announce_t *)malloc(
789 sizeof(sap_announce_t ) );
791 psz_value = convert_from_utf8( p_sd, p_sdp->psz_sessionname );
792 if( p_sap == NULL || psz_value == NULL )
798 p_sap->i_last = mdate();
799 p_sap->i_hash = i_hash;
800 p_sap->p_sdp = p_sdp;
801 p_sap->i_item_id = -1;
803 /* Create the playlist item here */
804 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, psz_value );
813 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
814 if( psz_value != NULL )
816 vlc_input_item_AddInfo( &p_item->input, _("Session"),
817 _("Tool"), psz_value );
819 if( strcmp( p_sdp->psz_username, "-" ) )
821 vlc_input_item_AddInfo( &p_item->input, _("Session"),
822 _("User"), p_sdp->psz_username );
825 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
827 if( psz_value == NULL )
829 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
832 if( psz_value != NULL )
834 char *psz_grp = convert_from_utf8( p_sd, psz_value );
836 if( psz_grp != NULL )
838 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node,
841 if( p_child == NULL )
843 p_child = playlist_NodeCreate( p_sd->p_sys->p_playlist,
844 VIEW_CATEGORY, psz_grp,
845 p_sd->p_sys->p_node );
846 p_child->i_flags =~ PLAYLIST_SKIP_FLAG;
852 msg_Err( p_sd, "out of memory");
859 p_child = p_sd->p_sys->p_node;
862 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
863 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
865 playlist_NodeAddItem( p_sd->p_sys->p_playlist, p_item, VIEW_CATEGORY,
866 p_child, PLAYLIST_APPEND, PLAYLIST_END );
868 p_sap->i_item_id = p_item->input.i_id;
870 TAB_APPEND( p_sd->p_sys->i_announces,
871 p_sd->p_sys->pp_announces, p_sap );
876 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
880 for( i = 0 ; i< p_sdp->i_attributes; i++ )
882 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
883 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
885 return p_sdp->pp_attributes[i]->psz_value;
892 /* Fill p_sdp->psz_uri */
893 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
897 char *psz_uri = NULL;
898 char *psz_proto = NULL;
902 if( p_sdp->psz_connection )
904 psz_parse = p_sdp->psz_connection;
906 psz_eof = strchr( psz_parse, ' ' );
911 psz_parse = psz_eof + 1;
915 msg_Warn( p_obj, "unable to parse c field (1)");
919 psz_eof = strchr( psz_parse, ' ' );
924 if( !strncmp( psz_parse, "IP4", 3 ) )
928 else if( !strncmp( psz_parse, "IP6", 3 ) )
936 psz_parse = psz_eof + 1;
940 msg_Warn( p_obj, "unable to parse c field (2)");
944 psz_eof = strchr( psz_parse, '/' );
952 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
954 psz_uri = strdup( psz_parse );
959 if( p_sdp->psz_media )
961 psz_parse = p_sdp->psz_media;
963 psz_eof = strchr( psz_parse, ' ' );
969 if( strncmp( psz_parse, "audio", 5 ) &&
970 strncmp( psz_parse, "video",5 ) )
972 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
977 psz_parse = psz_eof + 1;
981 msg_Warn( p_obj, "unable to parse m field (1)");
986 psz_eof = strchr( psz_parse, ' ' );
992 /* FIXME : multiple port ! */
993 i_port = atoi( psz_parse );
995 if( i_port <= 0 || i_port >= 65536 )
997 msg_Warn( p_obj, "invalid transport port %i", i_port );
1000 psz_parse = psz_eof + 1;
1004 msg_Warn( p_obj, "unable to parse m field (2)");
1006 return VLC_EGENERIC;
1009 psz_eof = strchr( psz_parse, ' ' );
1014 psz_proto = strdup( psz_parse );
1016 psz_parse = psz_eof + 1;
1017 p_sdp->i_media_type = atoi( psz_parse );
1022 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1023 p_sdp->i_media_type = 33;
1024 psz_proto = strdup( psz_parse );
1028 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1031 psz_proto = strdup( "rtp" );
1033 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1036 psz_proto = strdup( "udp" );
1039 /* FIXME: HTTP support */
1046 if( ismult( psz_uri ) )
1048 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1052 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1059 /***********************************************************************
1060 * ParseSDP : SDP parsing
1061 * *********************************************************************
1062 * Validate SDP and parse all fields
1063 ***********************************************************************/
1064 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1067 vlc_bool_t b_invalid = VLC_FALSE;
1068 vlc_bool_t b_end = VLC_FALSE;
1069 if( psz_sdp == NULL )
1074 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1076 msg_Warn( p_obj, "Bad packet" );
1080 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1082 p_sdp->psz_sdp = strdup( psz_sdp );
1084 p_sdp->psz_sessionname = NULL;
1085 p_sdp->psz_media = NULL;
1086 p_sdp->psz_connection = NULL;
1087 p_sdp->psz_uri = NULL;
1088 p_sdp->psz_address = NULL;
1089 p_sdp->psz_address_type= NULL;
1092 p_sdp->i_attributes = 0;
1093 p_sdp->pp_attributes = NULL;
1095 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1102 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1103 *psz_sdp == ' ' || *psz_sdp == '\t' )
1108 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1110 psz_eol = psz_sdp + strlen( psz_sdp );
1113 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1118 if( psz_eol <= psz_sdp )
1124 /* no space allowed between fields */
1125 if( psz_sdp[1] != '=' )
1127 msg_Warn( p_obj, "invalid packet" ) ;
1132 /* Now parse each line */
1133 switch( psz_sdp[0] )
1138 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1143 /* o field is <username> <session id> <version>
1144 * <network type> <address type> <address> */
1146 #define GET_FIELD( store ) \
1147 psz_eof = strchr( psz_parse, ' ' ); \
1150 *psz_eof=0; store = strdup( psz_parse ); \
1154 if( i_field != 5 ) \
1156 b_invalid = VLC_TRUE; break; \
1160 store = strdup( psz_parse ); \
1163 psz_parse = psz_eof + 1; i_field++;
1166 psz_parse = &psz_sdp[2];
1167 GET_FIELD( p_sdp->psz_username );
1168 GET_FIELD( psz_sess_id );
1170 p_sdp->i_session_id = atoll( psz_sess_id );
1172 FREE( psz_sess_id );
1174 GET_FIELD( psz_sess_id );
1175 FREE( psz_sess_id );
1177 GET_FIELD( p_sdp->psz_network_type );
1178 GET_FIELD( p_sdp->psz_address_type );
1179 GET_FIELD( p_sdp->psz_address );
1190 case( 'a' ): /* attribute */
1192 char *psz_eon = strchr( &psz_sdp[2], ':' );
1193 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1195 /* Attribute with value */
1200 p_attr->psz_field = strdup( &psz_sdp[2] );
1201 p_attr->psz_value = strdup( psz_eon );
1203 else /* Attribute without value */
1205 p_attr->psz_field = strdup( &psz_sdp[2] );
1206 p_attr->psz_value = NULL;
1209 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1213 case( 'm' ): /* Media announcement */
1215 /* If we have several medias, we pass the announcement to
1216 * LIVE.COM, so just count them */
1218 if( p_sdp->i_media == 1 )
1220 p_sdp->psz_media = strdup( &psz_sdp[2] );
1227 if( p_sdp->i_media > 1 )
1230 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1251 static char *convert_from_utf8( struct services_discovery_t *p_sd,
1254 char *psz_local, *psz_in, *psz_out;
1255 size_t ret, i_in, i_out;
1256 vlc_bool_t b_warn = VLC_FALSE;
1258 if( psz_unicode == NULL )
1261 psz_in = psz_unicode;
1262 i_in = strlen( psz_unicode );
1267 i_out = MB_CUR_MAX * i_in;
1269 psz_local = malloc( i_out + 1 );
1270 if( psz_local == NULL )
1272 psz_out = psz_local;
1276 ret = vlc_iconv( p_sd->p_sys->iconvHandle,
1277 &psz_in, &i_in, &psz_out, &i_out);
1284 if( ret == (size_t)(-1) )
1286 msg_Err( p_sd, "character conversion failure : %s",
1287 strerror( errno ) );
1295 msg_Warn( p_sd, "in \"%s\" : %s", psz_unicode,
1296 strerror( errno ) );
1303 /***********************************************************************
1304 * ismult: returns true if we have a multicast address
1305 ***********************************************************************/
1306 static vlc_bool_t ismult( char *psz_uri )
1312 if( psz_uri[0] == '[')
1314 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1315 ( !isalnum( psz_uri[1]) && strncasecmp( &psz_uri[2], "FF0" , 3) ) )
1318 return( VLC_FALSE );
1321 i_value = strtol( psz_uri, &psz_end, 0 );
1323 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1325 return ( ( i_value < 224 ) || ( i_value >= 240 ) ) ? VLC_FALSE : VLC_TRUE;
1328 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1331 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1335 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1336 p_sd->p_sys->i_fd, i_fd );
1340 return VLC_EGENERIC;
1344 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1346 int i_result, i_dstsize, n;
1347 unsigned char *psz_dst;
1350 d_stream.zalloc = (alloc_func)0;
1351 d_stream.zfree = (free_func)0;
1352 d_stream.opaque = (voidpf)0;
1354 i_result = inflateInit(&d_stream);
1355 if( i_result != Z_OK )
1357 printf( "inflateInit() failed. Result: %d\n", i_result );
1361 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1362 i_position = p_playlist->i_index;
1364 /* Gather the complete sdp file */
1367 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1369 d_stream.next_in = (Bytef *)psz_src;
1370 d_stream.avail_in = i_len;
1378 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1379 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1380 d_stream.avail_out = 1000;
1382 i_result = inflate(&d_stream, Z_NO_FLUSH);
1383 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1385 printf( "Zlib decompression failed. Result: %d\n", i_result );
1389 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1390 ( i_result != Z_STREAM_END ) );
1392 i_dstsize = d_stream.total_out;
1393 inflateEnd( &d_stream );
1395 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1402 static void FreeSDP( sdp_t *p_sdp )
1405 FREE( p_sdp->psz_sdp );
1406 FREE( p_sdp->psz_sessionname );
1407 FREE( p_sdp->psz_connection );
1408 FREE( p_sdp->psz_media );
1409 FREE( p_sdp->psz_uri );
1410 FREE( p_sdp->psz_username );
1411 FREE( p_sdp->psz_network_type );
1413 FREE( p_sdp->psz_address );
1414 FREE( p_sdp->psz_address_type );
1416 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1418 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1419 FREE( p_sdp->pp_attributes[i]->psz_field );
1420 FREE( p_sdp->pp_attributes[i]->psz_value );
1421 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1427 static int RemoveAnnounce( services_discovery_t *p_sd,
1428 sap_announce_t *p_announce )
1432 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1434 if( p_announce->i_item_id > -1 )
1436 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1439 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1441 if( p_sd->p_sys->pp_announces[i] == p_announce )
1443 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1454 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1456 /* A session is identified by
1457 * username, session_id, network type, address type and address */
1458 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1459 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1460 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1461 p_sdp1->psz_address && p_sdp2->psz_address )
1463 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1464 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1465 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1466 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1467 p_sdp1->i_session_id == p_sdp2->i_session_id )
1483 static void CacheLoad( services_discovery_t *p_sd )
1485 msg_Warn( p_sd, "Cache not implemented") ;
1488 static void CacheSave( services_discovery_t *p_sd )
1490 msg_Warn( p_sd, "Cache not implemented") ;