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 SAP_V6_1 "FF0"
70 /* Scope is inserted between them */
71 #define SAP_V6_2 "::2:7FFE"
72 /* See RFC3513 for list of valid scopes */
73 static const char ipv6_scopes[] = "12456789ABCDE";
76 /*****************************************************************************
78 *****************************************************************************/
79 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
80 #define SAP_ADDR_LONGTEXT N_( "Listen for SAP announces 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 announces " \
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 announces " \
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 announces (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 announce " \
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 announces 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." )
111 static int Open ( vlc_object_t * );
112 static void Close( vlc_object_t * );
113 static int OpenDemux ( vlc_object_t * );
114 static void CloseDemux ( vlc_object_t * );
117 set_shortname( _("SAP"));
118 set_description( _("SAP announces") );
119 set_category( CAT_PLAYLIST );
120 set_subcategory( SUBCAT_PLAYLIST_SD );
122 add_string( "sap-addr", NULL, NULL,
123 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
124 add_bool( "sap-ipv4", 1 , NULL,
125 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
126 add_bool( "sap-ipv6", 1 , NULL,
127 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
128 add_integer( "sap-timeout", 1800, NULL,
129 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
130 add_bool( "sap-parse", 1 , NULL,
131 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
132 add_bool( "sap-strict", 0 , NULL,
133 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
134 add_bool( "sap-cache", 0 , NULL,
135 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
137 set_capability( "services_discovery", 0 );
138 set_callbacks( Open, Close );
141 set_description( _("SDP file parser for UDP") );
142 add_shortcut( "sdp" );
143 set_capability( "demux2", 51 );
144 set_callbacks( OpenDemux, CloseDemux );
148 /*****************************************************************************
150 *****************************************************************************/
152 typedef struct sdp_t sdp_t;
153 typedef struct attribute_t attribute_t;
154 typedef struct sap_announce_t sap_announce_t;
156 /* The structure that contains sdp information */
162 char *psz_sessionname;
164 /* Raw m= and c= fields */
165 char *psz_connection;
170 char *psz_network_type;
171 char *psz_address_type;
173 int64_t i_session_id;
178 int i_in; /* IP version */
184 attribute_t **pp_attributes;
193 struct sap_announce_t
198 uint32_t i_source[4];
200 /* SAP annnounces must only contain one SDP */
204 // playlist_item_t *p_item;
207 struct services_discovery_sys_t
209 /* Socket descriptors */
214 playlist_item_t *p_node;
215 playlist_t *p_playlist;
217 /* charset conversion */
218 vlc_iconv_t iconvHandle;
220 /* Table of announces */
222 struct sap_announce_t **pp_announces;
236 /*****************************************************************************
238 *****************************************************************************/
242 static int Demux( demux_t *p_demux );
243 static int Control( demux_t *, int, va_list );
244 static void Run ( services_discovery_t *p_sd );
246 /* Main parsing functions */
247 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
248 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
249 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
250 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
251 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
254 static void CacheLoad( services_discovery_t *p_sd );
255 static void CacheSave( services_discovery_t *p_sd );
256 /* Helper functions */
257 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
258 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
259 static char *convert_from_utf8( struct services_discovery_t *p_sd,
261 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
263 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
265 static void FreeSDP( sdp_t *p_sdp );
267 /* Detect multicast addresses */
268 static vlc_bool_t ismult( char * );
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;
282 char *psz_addr, *psz_charset;
285 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
287 vlc_current_charset( &psz_charset );
288 p_sys->iconvHandle = vlc_iconv_open( psz_charset, "UTF-8" );
290 if( p_sys->iconvHandle == (vlc_iconv_t)(-1) )
292 msg_Err( p_sd, "unable to perform characters conversion" );
302 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
303 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
305 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
310 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
312 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
313 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
314 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
315 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
317 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
319 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
322 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
324 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
325 InitSocket( p_sd, psz_address, SAP_PORT );
329 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
330 if( psz_addr && *psz_addr )
332 InitSocket( p_sd, psz_addr, SAP_PORT );
335 if( p_sys->i_fd == 0 )
337 msg_Err( p_sd, "unable to read on any address" );
341 /* Create our playlist node */
342 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
345 if( !p_sys->p_playlist )
347 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
351 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
352 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
353 _("SAP"), p_view->p_root );
354 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
355 p_sys->p_node->i_flags =~ PLAYLIST_SKIP_FLAG;
356 val.b_bool = VLC_TRUE;
357 var_Set( p_sys->p_playlist, "intf-change", val );
359 p_sys->i_announces = 0;
360 p_sys->pp_announces = NULL;
365 /*****************************************************************************
366 * OpenDemux: initialize and create stuff
367 *****************************************************************************/
368 static int OpenDemux( vlc_object_t *p_this )
370 demux_t *p_demux = (demux_t *)p_this;
372 int i_max_sdp = 1024;
374 char *psz_sdp = NULL;
380 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
382 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
383 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
384 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
390 psz_sdp = (char *)malloc( i_max_sdp );
391 if( !psz_sdp ) return VLC_EGENERIC;
393 /* Gather the complete sdp file */
396 int i_read = stream_Read( p_demux->s,
397 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
401 msg_Err( p_demux, "failed to read SDP" );
407 if( i_read < i_max_sdp - i_sdp - 1 )
409 psz_sdp[i_sdp] = '\0';
414 psz_sdp = (uint8_t*)realloc( psz_sdp, i_max_sdp );
417 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
421 msg_Warn( p_demux, "invalid SDP");
425 if( p_sdp->i_media > 1 )
430 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
432 p_sdp->psz_uri = NULL;
434 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
435 p_sdp->i_media_type != 14 )
438 if( p_sdp->psz_uri == NULL ) goto error;
440 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
441 p_demux->p_sys->p_sdp = p_sdp;
442 p_demux->pf_control = Control;
443 p_demux->pf_demux = Demux;
450 if( p_sdp ) FreeSDP( p_sdp );
451 stream_Seek( p_demux->s, 0 );
455 /*****************************************************************************
457 *****************************************************************************/
458 static void Close( vlc_object_t *p_this )
460 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
461 services_discovery_sys_t *p_sys = p_sd->p_sys;
465 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
467 net_Close( p_sys->pi_fd[i] );
469 FREE( p_sys->pi_fd );
471 if( config_GetInt( p_sd, "sap-cache" ) )
476 for( i = p_sys->i_announces - 1; i>= 0; i-- )
478 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
480 FREE( p_sys->pp_announces );
482 if( p_sys->p_playlist )
484 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
486 vlc_object_release( p_sys->p_playlist );
489 vlc_iconv_close( p_sys->iconvHandle );
494 /*****************************************************************************
495 * CloseDemux: Close the demuxer
496 *****************************************************************************/
497 static void CloseDemux( vlc_object_t *p_this )
502 /*****************************************************************************
503 * Run: main SAP thread
504 *****************************************************************************
505 * Listens to SAP packets, and sends them to packet_handle
506 *****************************************************************************/
507 #define MAX_SAP_BUFFER 5000
509 static void Run( services_discovery_t *p_sd )
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 p_announce = p_sd->p_sys->pp_announces[i];
533 /* Remove the playlist item */
534 playlist_LockDelete( p_sd->p_sys->p_playlist,
535 p_announce->i_item_id );
537 /* Remove the sap_announce from the array */
538 REMOVE_ELEM( p_sd->p_sys->pp_announces,
539 p_sd->p_sys->i_announces, i );
545 /* Minimum length is > 6 */
550 msg_Warn( p_sd, "socket read error" );
555 p_buffer[i_read] = '\0';
557 /* Parse the packet */
558 ParseSAP( p_sd, p_buffer, i_read );
562 /**********************************************************************
563 * Demux: reads and demuxes data packets
564 * Return -1 if error, 0 if EOF, 1 else
565 **********************************************************************/
566 static int Demux( demux_t *p_demux )
568 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
569 playlist_t *p_playlist;
571 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
574 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
576 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
577 PLAYLIST_APPEND, PLAYLIST_END );
579 vlc_object_release( p_playlist );
580 if( p_sdp ) FreeSDP( p_sdp );
585 static int Control( demux_t *p_demux, int i_query, va_list args )
590 /**************************************************************
592 **************************************************************/
594 /* i_read is at least > 6 */
595 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
597 int i_version, i_address_type, i_hash, i;
599 uint8_t *psz_initial_sdp;
601 vlc_bool_t b_compressed;
602 vlc_bool_t b_need_delete = VLC_FALSE;
604 int i_decompressed_size;
605 uint8_t *p_decompressed_buffer;
609 /* First, check the sap announce is correct */
610 i_version = p_buffer[0] >> 5;
613 msg_Dbg( p_sd, "strange sap version %d found", i_version );
616 i_address_type = p_buffer[0] & 0x10;
618 if( (p_buffer[0] & 0x08) != 0 )
620 msg_Dbg( p_sd, "reserved bit incorrectly set" );
624 if( (p_buffer[0] & 0x04) != 0 )
626 msg_Dbg( p_sd, "session deletion packet" );
627 b_need_delete = VLC_TRUE;
630 if( p_buffer[0] & 0x02 )
632 msg_Dbg( p_sd, "encrypted packet, unsupported" );
636 b_compressed = p_buffer[0] & 0x01;
638 i_hash = ( p_buffer[2] << 8 ) + p_buffer[3];
640 if( p_sd->p_sys->b_strict && i_hash == 0 )
642 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
646 psz_sdp = &p_buffer[4];
647 psz_initial_sdp = psz_sdp;
649 if( i_address_type == 0 ) /* ipv4 source address */
654 msg_Warn( p_sd, "too short SAP packet\n" );
658 else /* ipv6 source address */
663 msg_Warn( p_sd, "too short SAP packet\n" );
671 i_decompressed_size = Decompress( psz_sdp,
672 &p_decompressed_buffer,i_read - ( psz_sdp - p_buffer ) );
673 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
675 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
676 psz_sdp[i_decompressed_size] = '\0';
677 free( p_decompressed_buffer );
680 msg_Warn( p_sd, "Ignoring compressed sap packet" );
685 /* Add the size of authentification info */
686 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
688 msg_Warn( p_sd, "too short SAP packet\n");
691 psz_sdp += p_buffer[1];
694 /* Skip payload type */
695 /* Handle announces without \0 between SAP and SDP */
696 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
698 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
700 msg_Warn( p_sd, "empty SDP ?");
705 if( *psz_sdp == '\0' )
709 if( psz_sdp != psz_foo && strcasecmp( psz_foo, "application/sdp" ) )
711 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
713 if( psz_sdp -p_buffer >= i_read )
715 msg_Warn( p_sd, "package without content" );
720 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
727 /* Decide whether we should add a playlist item for this SDP */
728 /* Parse connection information (c= & m= ) */
729 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
731 p_sdp->psz_uri = NULL;
734 /* Multi-media or no-parse -> pass to LIVE.COM */
735 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
736 p_sdp->i_media_type != 32 &&
737 p_sdp->i_media_type != 33) ||
738 p_sd->p_sys->b_parse == VLC_FALSE )
740 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
741 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
744 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
746 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
749 /* FIXME: we create a new announce each time the sdp changes */
750 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
754 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
759 p_sd->p_sys->pp_announces[i]->i_last = mdate();
766 if( p_sdp->i_media > 1 )
768 msg_Dbg( p_sd, "passing to LIVE.COM" );
771 CreateAnnounce( p_sd, i_hash, p_sdp );
776 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
779 playlist_item_t *p_item, *p_child;
781 sap_announce_t *p_sap = (sap_announce_t *)malloc(
782 sizeof(sap_announce_t ) );
784 psz_value = convert_from_utf8( p_sd, p_sdp->psz_sessionname );
785 if( p_sap == NULL || psz_value == NULL )
791 p_sap->i_last = mdate();
792 p_sap->i_hash = i_hash;
793 p_sap->p_sdp = p_sdp;
794 p_sap->i_item_id = -1;
796 /* Create the playlist item here */
797 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, psz_value );
806 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
807 if( psz_value != NULL )
809 vlc_input_item_AddInfo( &p_item->input, _("Session"),
810 _("Tool"), psz_value );
812 if( strcmp( p_sdp->psz_username, "-" ) )
814 vlc_input_item_AddInfo( &p_item->input, _("Session"),
815 _("User"), p_sdp->psz_username );
818 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
820 if( psz_value == NULL )
822 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
825 if( psz_value != NULL )
827 char *psz_grp = convert_from_utf8( p_sd, psz_value );
829 if( psz_grp != NULL )
831 p_child = playlist_ChildSearchName( p_sd->p_sys->p_node,
834 if( p_child == NULL )
836 p_child = playlist_NodeCreate( p_sd->p_sys->p_playlist,
837 VIEW_CATEGORY, psz_grp,
838 p_sd->p_sys->p_node );
839 p_child->i_flags =~ PLAYLIST_SKIP_FLAG;
845 msg_Err( p_sd, "out of memory");
852 p_child = p_sd->p_sys->p_node;
855 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
856 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
858 playlist_NodeAddItem( p_sd->p_sys->p_playlist, p_item, VIEW_CATEGORY,
859 p_child, PLAYLIST_APPEND, PLAYLIST_END );
861 p_sap->i_item_id = p_item->input.i_id;
863 TAB_APPEND( p_sd->p_sys->i_announces,
864 p_sd->p_sys->pp_announces, p_sap );
869 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
873 for( i = 0 ; i< p_sdp->i_attributes; i++ )
875 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
876 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
878 return p_sdp->pp_attributes[i]->psz_value;
885 /* Fill p_sdp->psz_uri */
886 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
890 char *psz_uri = NULL;
891 char *psz_proto = NULL;
895 if( p_sdp->psz_connection )
897 psz_parse = p_sdp->psz_connection;
899 psz_eof = strchr( psz_parse, ' ' );
904 psz_parse = psz_eof + 1;
908 msg_Warn( p_obj, "unable to parse c field (1)");
912 psz_eof = strchr( psz_parse, ' ' );
917 if( !strncmp( psz_parse, "IP4", 3 ) )
921 else if( !strncmp( psz_parse, "IP6", 3 ) )
929 psz_parse = psz_eof + 1;
933 msg_Warn( p_obj, "unable to parse c field (2)");
937 psz_eof = strchr( psz_parse, '/' );
945 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
947 psz_uri = strdup( psz_parse );
952 if( p_sdp->psz_media )
954 psz_parse = p_sdp->psz_media;
956 psz_eof = strchr( psz_parse, ' ' );
962 if( strncmp( psz_parse, "audio", 5 ) &&
963 strncmp( psz_parse, "video",5 ) )
965 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
970 psz_parse = psz_eof + 1;
974 msg_Warn( p_obj, "unable to parse m field (1)");
979 psz_eof = strchr( psz_parse, ' ' );
985 /* FIXME : multiple port ! */
986 i_port = atoi( psz_parse );
988 if( i_port <= 0 || i_port >= 65536 )
990 msg_Warn( p_obj, "invalid transport port %i", i_port );
993 psz_parse = psz_eof + 1;
997 msg_Warn( p_obj, "unable to parse m field (2)");
1002 psz_eof = strchr( psz_parse, ' ' );
1007 psz_proto = strdup( psz_parse );
1009 psz_parse = psz_eof + 1;
1010 p_sdp->i_media_type = atoi( psz_parse );
1015 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1016 p_sdp->i_media_type = 33;
1017 psz_proto = strdup( psz_parse );
1021 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1024 psz_proto = strdup( "rtp" );
1026 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1029 psz_proto = strdup( "udp" );
1032 /* FIXME: HTTP support */
1039 if( ismult( psz_uri ) )
1041 asprintf( &p_sdp->psz_uri, "%s://@%s:%i", psz_proto, psz_uri, i_port );
1045 asprintf( &p_sdp->psz_uri, "%s://%s:%i", psz_proto, psz_uri, i_port );
1052 /***********************************************************************
1053 * ParseSDP : SDP parsing
1054 * *********************************************************************
1055 * Validate SDP and parse all fields
1056 ***********************************************************************/
1057 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1060 vlc_bool_t b_invalid = VLC_FALSE;
1061 vlc_bool_t b_end = VLC_FALSE;
1062 if( psz_sdp == NULL )
1067 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1069 msg_Warn( p_obj, "Bad packet" );
1073 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1075 p_sdp->psz_sdp = strdup( psz_sdp );
1077 p_sdp->psz_sessionname = NULL;
1078 p_sdp->psz_media = NULL;
1079 p_sdp->psz_connection = NULL;
1080 p_sdp->psz_uri = NULL;
1081 p_sdp->psz_address = NULL;
1082 p_sdp->psz_address_type= NULL;
1085 p_sdp->i_attributes = 0;
1086 p_sdp->pp_attributes = NULL;
1088 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1095 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1096 *psz_sdp == ' ' || *psz_sdp == '\t' )
1101 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1103 psz_eol = psz_sdp + strlen( psz_sdp );
1106 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1111 if( psz_eol <= psz_sdp )
1117 /* no space allowed between fields */
1118 if( psz_sdp[1] != '=' )
1120 msg_Warn( p_obj, "invalid packet" ) ;
1125 /* Now parse each line */
1126 switch( psz_sdp[0] )
1131 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1136 /* o field is <username> <session id> <version>
1137 * <network type> <address type> <address> */
1139 #define GET_FIELD( store ) \
1140 psz_eof = strchr( psz_parse, ' ' ); \
1143 *psz_eof=0; store = strdup( psz_parse ); \
1147 if( i_field != 5 ) \
1149 b_invalid = VLC_TRUE; break; \
1153 store = strdup( psz_parse ); \
1156 psz_parse = psz_eof + 1; i_field++;
1159 psz_parse = &psz_sdp[2];
1160 GET_FIELD( p_sdp->psz_username );
1161 GET_FIELD( psz_sess_id );
1163 p_sdp->i_session_id = atoll( psz_sess_id );
1165 FREE( psz_sess_id );
1167 GET_FIELD( psz_sess_id );
1168 FREE( psz_sess_id );
1170 GET_FIELD( p_sdp->psz_network_type );
1171 GET_FIELD( p_sdp->psz_address_type );
1172 GET_FIELD( p_sdp->psz_address );
1183 case( 'a' ): /* attribute */
1185 char *psz_eon = strchr( &psz_sdp[2], ':' );
1186 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1188 /* Attribute with value */
1193 p_attr->psz_field = strdup( &psz_sdp[2] );
1194 p_attr->psz_value = strdup( psz_eon );
1196 else /* Attribute without value */
1198 p_attr->psz_field = strdup( &psz_sdp[2] );
1199 p_attr->psz_value = NULL;
1202 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1206 case( 'm' ): /* Media announcement */
1208 /* If we have several medias, we pass the announcement to
1209 * LIVE.COM, so just count them */
1211 if( p_sdp->i_media == 1 )
1213 p_sdp->psz_media = strdup( &psz_sdp[2] );
1220 if( p_sdp->i_media > 1 )
1223 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1244 static char *convert_from_utf8( struct services_discovery_t *p_sd,
1247 char *psz_local, *psz_in, *psz_out;
1248 size_t ret, i_in, i_out;
1249 vlc_bool_t b_warn = VLC_FALSE;
1251 if( psz_unicode == NULL )
1254 psz_in = psz_unicode;
1255 i_in = strlen( psz_unicode );
1260 i_out = MB_CUR_MAX * i_in;
1262 psz_local = malloc( i_out + 1 );
1263 if( psz_local == NULL )
1265 psz_out = psz_local;
1269 ret = vlc_iconv( p_sd->p_sys->iconvHandle,
1270 &psz_in, &i_in, &psz_out, &i_out);
1277 if( ret == (size_t)(-1) )
1279 msg_Err( p_sd, "character conversion failure : %s",
1280 strerror( errno ) );
1288 msg_Warn( p_sd, "in \"%s\" : %s", psz_unicode,
1289 strerror( errno ) );
1296 /***********************************************************************
1297 * ismult: returns true if we have a multicast address
1298 ***********************************************************************/
1299 static vlc_bool_t ismult( char *psz_uri )
1305 if( psz_uri[0] == '[')
1307 if( strncasecmp( &psz_uri[1], "FF0" , 3) ||
1308 ( !isalnum( psz_uri[1]) && strncasecmp( &psz_uri[2], "FF0" , 3) ) )
1311 return( VLC_FALSE );
1314 i_value = strtol( psz_uri, &psz_end, 0 );
1316 if( *psz_end != '.' ) { return( VLC_FALSE ); }
1318 return ( ( i_value < 224 ) || ( i_value >= 240 ) ) ? VLC_FALSE : VLC_TRUE;
1321 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1324 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, "", 0 );
1328 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1329 p_sd->p_sys->i_fd, i_fd );
1333 return VLC_EGENERIC;
1337 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1339 int i_result, i_dstsize, n;
1340 unsigned char *psz_dst;
1343 d_stream.zalloc = (alloc_func)0;
1344 d_stream.zfree = (free_func)0;
1345 d_stream.opaque = (voidpf)0;
1347 i_result = inflateInit(&d_stream);
1348 if( i_result != Z_OK )
1350 printf( "inflateInit() failed. Result: %d\n", i_result );
1354 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1355 i_position = p_playlist->i_index;
1357 /* Gather the complete sdp file */
1360 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1362 d_stream.next_in = (Bytef *)psz_src;
1363 d_stream.avail_in = i_len;
1371 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1372 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1373 d_stream.avail_out = 1000;
1375 i_result = inflate(&d_stream, Z_NO_FLUSH);
1376 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1378 printf( "Zlib decompression failed. Result: %d\n", i_result );
1382 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1383 ( i_result != Z_STREAM_END ) );
1385 i_dstsize = d_stream.total_out;
1386 inflateEnd( &d_stream );
1388 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1395 static void FreeSDP( sdp_t *p_sdp )
1398 FREE( p_sdp->psz_sdp );
1399 FREE( p_sdp->psz_sessionname );
1400 FREE( p_sdp->psz_connection );
1401 FREE( p_sdp->psz_media );
1402 FREE( p_sdp->psz_uri );
1403 FREE( p_sdp->psz_username );
1404 FREE( p_sdp->psz_network_type );
1406 FREE( p_sdp->psz_address );
1407 FREE( p_sdp->psz_address_type );
1409 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1411 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1412 FREE( p_sdp->pp_attributes[i]->psz_field );
1413 FREE( p_sdp->pp_attributes[i]->psz_value );
1414 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1420 static int RemoveAnnounce( services_discovery_t *p_sd,
1421 sap_announce_t *p_announce )
1425 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1427 if( p_announce->i_item_id > -1 )
1429 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1432 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1434 if( p_sd->p_sys->pp_announces[i] == p_announce )
1436 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1447 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1449 /* A session is identified by
1450 * username, session_id, network type, address type and address */
1451 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1452 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1453 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1454 p_sdp1->psz_address && p_sdp2->psz_address )
1456 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1457 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1458 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1459 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1460 p_sdp1->i_session_id == p_sdp2->i_session_id )
1476 static void CacheLoad( services_discovery_t *p_sd )
1478 msg_Warn( p_sd, "Cache not implemented") ;
1481 static void CacheSave( services_discovery_t *p_sd )
1483 msg_Warn( p_sd, "Cache not implemented") ;