1 /*****************************************************************************
2 * sap.c : SAP interface module
3 *****************************************************************************
4 * Copyright (C) 2004-2005 the VideoLAN team
7 * Authors: Clément Stenac <zorglub@videolan.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
30 #include <vlc/input.h>
42 #ifdef HAVE_SYS_TIME_H
43 # include <sys/time.h>
50 /************************************************************************
51 * Macros and definitions
52 ************************************************************************/
54 #define MAX_LINE_LENGTH 256
56 /* SAP is always on that port */
58 /* Global-scope SAP address */
59 #define SAP_V4_GLOBAL_ADDRESS "224.2.127.254"
60 /* Organization-local SAP address */
61 #define SAP_V4_ORG_ADDRESS "239.195.255.255"
62 /* Local (smallest non-link-local scope) SAP address */
63 #define SAP_V4_LOCAL_ADDRESS "239.255.255.255"
64 /* Link-local SAP address */
65 #define SAP_V4_LINK_ADDRESS "224.0.0.255"
68 #define SAP_V6_1 "FF0"
69 /* Scope is inserted between them */
70 #define SAP_V6_2 "::2:7FFE"
71 /* See RFC3513 for list of valid scopes */
72 /* FIXME: find a way to listen to link-local scope */
73 static const char ipv6_scopes[] = "1456789ABCDE";
76 /*****************************************************************************
78 *****************************************************************************/
79 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
80 #define SAP_ADDR_LONGTEXT N_( "The SAP module normally chooses itself the " \
81 "right addresses to listen to. However, you " \
82 "can specify a specific address." )
83 #define SAP_IPV4_TEXT N_( "IPv4 SAP" )
84 #define SAP_IPV4_LONGTEXT N_( \
85 "Listen to IPv4 announcements " \
86 "on the standard address." )
87 #define SAP_IPV6_TEXT N_( "IPv6 SAP" )
88 #define SAP_IPV6_LONGTEXT N_( \
89 "Listen to IPv6 announcements " \
90 "on the standard addresses." )
91 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
92 #define SAP_SCOPE_LONGTEXT N_( \
93 "Scope for IPv6 announcements (default is 8)." )
94 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
95 #define SAP_TIMEOUT_LONGTEXT N_( \
96 "Delay after which SAP items get deleted if no new announcement " \
98 #define SAP_PARSE_TEXT N_( "Try to parse the announce" )
99 #define SAP_PARSE_LONGTEXT N_( \
100 "This enables actual parsing of the announces by the SAP module. " \
101 "Otherwise, all announcements are parsed by the \"livedotcom\" " \
102 "(RTP/RTSP) module." )
103 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
104 #define SAP_STRICT_LONGTEXT N_( \
105 "When this is set, the SAP parser will discard some non-compliant " \
107 #define SAP_CACHE_TEXT N_("Use SAP cache")
108 #define SAP_CACHE_LONGTEXT N_( \
109 "This enables a SAP caching mechanism. " \
110 "This will result in lower SAP startup time, but you could end up " \
111 "with items corresponding to legacy streams." )
112 #define SAP_TIMESHIFT_TEXT N_("Allow timeshifting")
113 #define SAP_TIMESHIFT_LONGTEXT N_( "This automatically enables timeshifting " \
114 "for streams discovered through SAP announcements." )
117 static int Open ( vlc_object_t * );
118 static void Close( vlc_object_t * );
119 static int OpenDemux ( vlc_object_t * );
120 static void CloseDemux ( vlc_object_t * );
123 set_shortname( _("SAP"));
124 set_description( _("SAP Announcements") );
125 set_category( CAT_PLAYLIST );
126 set_subcategory( SUBCAT_PLAYLIST_SD );
128 add_string( "sap-addr", NULL, NULL,
129 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
130 add_bool( "sap-ipv4", 1 , NULL,
131 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
132 add_bool( "sap-ipv6", 1 , NULL,
133 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
134 add_integer( "sap-timeout", 1800, NULL,
135 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
136 add_bool( "sap-parse", 1 , NULL,
137 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
138 add_bool( "sap-strict", 0 , NULL,
139 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
141 add_bool( "sap-cache", 0 , NULL,
142 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
144 add_bool( "sap-timeshift", 0 , NULL,
145 SAP_TIMESHIFT_TEXT,SAP_TIMESHIFT_LONGTEXT, VLC_TRUE );
147 set_capability( "services_discovery", 0 );
148 set_callbacks( Open, Close );
151 set_description( _("SDP file parser for UDP") );
152 add_shortcut( "sdp" );
153 set_capability( "demux2", 51 );
154 set_callbacks( OpenDemux, CloseDemux );
158 /*****************************************************************************
160 *****************************************************************************/
162 typedef struct sdp_t sdp_t;
163 typedef struct attribute_t attribute_t;
164 typedef struct sap_announce_t sap_announce_t;
166 /* The structure that contains sdp information */
172 char *psz_sessionname;
174 /* Raw m= and c= fields */
175 char *psz_connection;
180 char *psz_network_type;
181 char *psz_address_type;
183 int64_t i_session_id;
188 int i_in; /* IP version */
194 attribute_t **pp_attributes;
203 struct sap_announce_t
208 uint32_t i_source[4];
210 /* SAP annnounces must only contain one SDP */
214 // playlist_item_t *p_item;
217 struct services_discovery_sys_t
219 /* Socket descriptors */
224 playlist_item_t *p_node;
225 playlist_t *p_playlist;
227 /* Table of announces */
229 struct sap_announce_t **pp_announces;
234 vlc_bool_t b_timeshift;
244 /*****************************************************************************
246 *****************************************************************************/
250 static int Demux( demux_t *p_demux );
251 static int Control( demux_t *, int, va_list );
252 static void Run ( services_discovery_t *p_sd );
254 /* Main parsing functions */
255 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
256 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read );
257 static sdp_t * ParseSDP( vlc_object_t *p_sd, char* psz_sdp );
258 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
259 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
262 static void CacheLoad( services_discovery_t *p_sd );
263 static void CacheSave( services_discovery_t *p_sd );
264 /* Helper functions */
265 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
266 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
267 static int InitSocket( services_discovery_t *p_sd, char *psz_address, int i_port );
269 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len );
271 static void FreeSDP( sdp_t *p_sdp );
275 if( p ) { free( p ); (p) = NULL; }
276 /*****************************************************************************
277 * Open: initialize and create stuff
278 *****************************************************************************/
279 static int Open( vlc_object_t *p_this )
281 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
282 services_discovery_sys_t *p_sys = (services_discovery_sys_t *)
283 malloc( sizeof( services_discovery_sys_t ) );
285 playlist_view_t *p_view;
288 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
296 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
297 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
300 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
306 /* Cache sap_timeshift value */
307 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
308 ? VLC_TRUE : VLC_FALSE;
310 /* Create our playlist node */
311 p_sys->p_playlist = (playlist_t *)vlc_object_find( p_sd,
314 if( !p_sys->p_playlist )
316 msg_Warn( p_sd, "unable to find playlist, cancelling SAP listening");
320 p_view = playlist_ViewFind( p_sys->p_playlist, VIEW_CATEGORY );
321 p_sys->p_node = playlist_NodeCreate( p_sys->p_playlist, VIEW_CATEGORY,
322 _("Session Announcements (SAP)"), p_view->p_root );
323 p_sys->p_node->i_flags |= PLAYLIST_RO_FLAG;
324 p_sys->p_node->i_flags &= ~PLAYLIST_SKIP_FLAG;
325 val.b_bool = VLC_TRUE;
326 var_Set( p_sys->p_playlist, "intf-change", val );
328 p_sys->i_announces = 0;
329 p_sys->pp_announces = NULL;
334 /*****************************************************************************
335 * OpenDemux: initialize and create stuff
336 *****************************************************************************/
337 static int OpenDemux( vlc_object_t *p_this )
339 demux_t *p_demux = (demux_t *)p_this;
341 int i_max_sdp = 1024;
343 char *psz_sdp = NULL;
346 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
348 /* We want livedotcom module to parse this SDP file */
355 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
357 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
358 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
359 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
365 psz_sdp = (char *)malloc( i_max_sdp );
366 if( !psz_sdp ) return VLC_EGENERIC;
368 /* Gather the complete sdp file */
371 int i_read = stream_Read( p_demux->s,
372 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
376 msg_Err( p_demux, "failed to read SDP" );
382 if( i_read < i_max_sdp - i_sdp - 1 )
384 psz_sdp[i_sdp] = '\0';
389 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
392 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
396 msg_Warn( p_demux, "invalid SDP");
400 if( p_sdp->i_media > 1 )
405 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
407 p_sdp->psz_uri = NULL;
409 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
410 p_sdp->i_media_type != 14 )
413 if( p_sdp->psz_uri == NULL ) goto error;
415 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
416 p_demux->p_sys->p_sdp = p_sdp;
417 p_demux->pf_control = Control;
418 p_demux->pf_demux = Demux;
425 if( p_sdp ) FreeSDP( p_sdp );
426 stream_Seek( p_demux->s, 0 );
430 /*****************************************************************************
432 *****************************************************************************/
433 static void Close( vlc_object_t *p_this )
435 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
436 services_discovery_sys_t *p_sys = p_sd->p_sys;
440 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
442 net_Close( p_sys->pi_fd[i] );
444 FREE( p_sys->pi_fd );
447 if( config_GetInt( p_sd, "sap-cache" ) )
453 for( i = p_sys->i_announces - 1; i>= 0; i-- )
455 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
457 FREE( p_sys->pp_announces );
459 if( p_sys->p_playlist )
461 playlist_NodeDelete( p_sys->p_playlist, p_sys->p_node, VLC_TRUE,
463 vlc_object_release( p_sys->p_playlist );
469 /*****************************************************************************
470 * CloseDemux: Close the demuxer
471 *****************************************************************************/
472 static void CloseDemux( vlc_object_t *p_this )
477 /*****************************************************************************
478 * Run: main SAP thread
479 *****************************************************************************
480 * Listens to SAP packets, and sends them to packet_handle
481 *****************************************************************************/
482 #define MAX_SAP_BUFFER 5000
484 static void Run( services_discovery_t *p_sd )
489 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
490 * DNS queries, even if the DNS server returns an error with milliseconds.
491 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
492 * Winsock 1.1 from Windows 95, if not Windows 3.1.
493 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
494 * we have to open sockets in Run() rather than Open(). */
495 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
497 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
498 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
499 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
500 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
502 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
504 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
507 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
509 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
510 InitSocket( p_sd, psz_address, SAP_PORT );
514 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
515 if( psz_addr && *psz_addr )
517 InitSocket( p_sd, psz_addr, SAP_PORT );
520 if( p_sd->p_sys->i_fd == 0 )
522 msg_Err( p_sd, "unable to listen on any address" );
526 /* read SAP packets */
527 while( !p_sd->b_die )
530 uint8_t p_buffer[MAX_SAP_BUFFER+1];
532 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
533 p_sd->p_sys->i_fd, p_buffer,
534 MAX_SAP_BUFFER, 500000 );
536 /* Check for items that need deletion */
537 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
539 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
541 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
543 struct sap_announce_t *p_announce;
544 p_announce = p_sd->p_sys->pp_announces[i];
546 /* Remove the playlist item */
547 playlist_LockDelete( p_sd->p_sys->p_playlist,
548 p_announce->i_item_id );
550 /* Remove the sap_announce from the array */
551 REMOVE_ELEM( p_sd->p_sys->pp_announces,
552 p_sd->p_sys->i_announces, i );
558 /* Minimum length is > 6 */
563 msg_Warn( p_sd, "socket read error" );
568 p_buffer[i_read] = '\0';
570 /* Parse the packet */
571 ParseSAP( p_sd, p_buffer, i_read );
575 /**********************************************************************
576 * Demux: reads and demuxes data packets
577 * Return -1 if error, 0 if EOF, 1 else
578 **********************************************************************/
579 static int Demux( demux_t *p_demux )
581 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
582 playlist_t *p_playlist;
584 p_playlist = (playlist_t *)vlc_object_find( p_demux, VLC_OBJECT_PLAYLIST,
587 p_playlist->status.p_item->i_flags |= PLAYLIST_DEL_FLAG;
589 playlist_Add( p_playlist, p_sdp->psz_uri, p_sdp->psz_sessionname,
590 PLAYLIST_APPEND, PLAYLIST_END );
592 vlc_object_release( p_playlist );
593 if( p_sdp ) FreeSDP( p_sdp );
598 static int Control( demux_t *p_demux, int i_query, va_list args )
603 /**************************************************************
605 **************************************************************/
607 /* i_read is at least > 6 */
608 static int ParseSAP( services_discovery_t *p_sd, uint8_t *p_buffer, int i_read )
610 int i_version, i_address_type, i_hash, i;
611 char *psz_sdp, *psz_foo, *psz_initial_sdp;
613 vlc_bool_t b_compressed;
614 vlc_bool_t b_need_delete = VLC_FALSE;
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 = (char *)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" );
665 else /* ipv6 source address */
670 msg_Warn( p_sd, "too short SAP packet" );
678 uint8_t *p_decompressed_buffer = NULL;
679 int i_decompressed_size;
681 i_decompressed_size = Decompress( (uint8_t *)psz_sdp,
682 &p_decompressed_buffer, i_read - ( psz_sdp - (char *)p_buffer ) );
683 if( i_decompressed_size > 0 && i_decompressed_size < MAX_SAP_BUFFER )
685 memcpy( psz_sdp, p_decompressed_buffer, i_decompressed_size );
686 psz_sdp[i_decompressed_size] = '\0';
687 free( p_decompressed_buffer );
690 msg_Warn( p_sd, "ignoring compressed sap packet" );
695 /* Add the size of authentification info */
696 if( i_read < p_buffer[1] + (psz_sdp - psz_initial_sdp ) )
698 msg_Warn( p_sd, "too short SAP packet\n");
701 psz_sdp += p_buffer[1];
704 /* Skip payload type */
705 /* Handle announces without \0 between SAP and SDP */
706 while( *psz_sdp != '\0' && ( psz_sdp[0] != 'v' && psz_sdp[1] != '=' ) )
708 if( psz_sdp - psz_initial_sdp >= i_read - 5 )
710 msg_Warn( p_sd, "empty SDP ?");
715 if( *psz_sdp == '\0' )
719 if( ( psz_sdp != psz_foo ) && strcasecmp( psz_foo, "application/sdp" ) )
721 msg_Dbg( p_sd, "unhandled content type: %s", psz_foo );
723 if( ( psz_sdp - (char *)p_buffer ) >= i_read )
725 msg_Warn( p_sd, "package without content" );
730 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
737 /* Decide whether we should add a playlist item for this SDP */
738 /* Parse connection information (c= & m= ) */
739 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
741 p_sdp->psz_uri = NULL;
744 /* Multi-media or no-parse -> pass to LIVE.COM */
745 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
746 p_sdp->i_media_type != 32 &&
747 p_sdp->i_media_type != 33) ||
748 p_sd->p_sys->b_parse == VLC_FALSE )
750 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
751 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
754 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
756 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
759 /* FIXME: we create a new announce each time the sdp changes */
760 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
764 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
769 p_sd->p_sys->pp_announces[i]->i_last = mdate();
776 if( p_sdp->i_media > 1 )
778 msg_Dbg( p_sd, "passing to liveMedia" );
781 CreateAnnounce( p_sd, i_hash, p_sdp );
786 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
789 playlist_item_t *p_item, *p_child;
791 sap_announce_t *p_sap = (sap_announce_t *)malloc(
792 sizeof(sap_announce_t ) );
793 services_discovery_sys_t *p_sys;
799 EnsureUTF8( p_sdp->psz_sessionname );
800 p_sap->i_last = mdate();
801 p_sap->i_hash = i_hash;
802 p_sap->p_sdp = p_sdp;
803 p_sap->i_item_id = -1;
805 /* Create the actual playlist item here */
806 p_item = playlist_ItemNew( p_sd, p_sap->p_sdp->psz_uri, p_sdp->psz_sessionname );
814 if( p_sys->b_timeshift )
815 playlist_ItemAddOption( p_item, ":access-filter=timeshift" );
817 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
818 if( psz_value != NULL )
820 vlc_input_item_AddInfo( &p_item->input, _("Session"),
821 _("Tool"), psz_value );
823 if( strcmp( p_sdp->psz_username, "-" ) )
825 vlc_input_item_AddInfo( &p_item->input, _("Session"),
826 _("User"), p_sdp->psz_username );
829 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
831 if( psz_value == NULL )
833 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
836 /* Find or Create the group playlist non-playable item */
837 if( psz_value != NULL )
839 EnsureUTF8( psz_value );
841 p_child = playlist_ChildSearchName( p_sys->p_node, psz_value );
843 if( p_child == NULL )
845 p_child = playlist_NodeCreate( p_sys->p_playlist,
846 VIEW_CATEGORY, psz_value,
848 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
853 p_child = p_sys->p_node;
856 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
857 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
859 playlist_NodeAddItem( p_sys->p_playlist, p_item, VIEW_CATEGORY, p_child,
860 PLAYLIST_APPEND, PLAYLIST_END );
862 p_sap->i_item_id = p_item->input.i_id;
864 TAB_APPEND( p_sys->i_announces, 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;
892 char psz_source[256];
896 if( p_sdp->psz_connection )
898 psz_parse = p_sdp->psz_connection;
900 psz_eof = strchr( psz_parse, ' ' );
905 psz_parse = psz_eof + 1;
909 msg_Warn( p_obj, "unable to parse c field (1)");
913 psz_eof = strchr( psz_parse, ' ' );
918 if( !strncmp( psz_parse, "IP4", 3 ) )
922 else if( !strncmp( psz_parse, "IP6", 3 ) )
930 psz_parse = psz_eof + 1;
934 msg_Warn( p_obj, "unable to parse c field (2)");
938 psz_eof = strchr( psz_parse, '/' );
946 msg_Dbg( p_obj, "incorrect c field, %s", p_sdp->psz_connection );
948 if( p_sdp->i_in == 6 && ( isxdigit( *psz_parse ) || *psz_parse == ':' ) )
950 asprintf( &psz_uri, "[%s]", psz_parse );
952 else psz_uri = strdup( psz_parse );
957 if( p_sdp->psz_media )
959 psz_parse = p_sdp->psz_media;
961 psz_eof = strchr( psz_parse, ' ' );
967 if( strncmp( psz_parse, "audio", 5 ) &&
968 strncmp( psz_parse, "video", 5 ) )
970 msg_Warn( p_obj, "unhandled media type -%s-", psz_parse );
975 psz_parse = psz_eof + 1;
979 msg_Warn( p_obj, "unable to parse m field (1)");
984 psz_eof = strchr( psz_parse, ' ' );
990 /* FIXME : multiple port ! */
991 i_port = atoi( psz_parse );
993 if( i_port <= 0 || i_port >= 65536 )
995 msg_Warn( p_obj, "invalid transport port %i", i_port );
998 psz_parse = psz_eof + 1;
1002 msg_Warn( p_obj, "unable to parse m field (2)");
1004 return VLC_EGENERIC;
1007 psz_eof = strchr( psz_parse, ' ' );
1012 psz_proto = strdup( psz_parse );
1014 psz_parse = psz_eof + 1;
1015 p_sdp->i_media_type = atoi( psz_parse );
1020 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
1021 p_sdp->i_media_type = 33;
1022 psz_proto = strdup( psz_parse );
1026 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
1029 psz_proto = strdup( "rtp" );
1031 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
1034 psz_proto = strdup( "udp" );
1037 /* FIXME: HTTP support */
1044 /* handle SSM case */
1045 psz_parse = GetAttribute( p_sdp, "source-filter" );
1046 psz_source[0] = '\0';
1048 if( psz_parse ) sscanf( psz_parse, " incl IN IP%*s %*s %255s ", psz_source);
1050 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1058 /***********************************************************************
1059 * ParseSDP : SDP parsing
1060 * *********************************************************************
1061 * Validate SDP and parse all fields
1062 ***********************************************************************/
1063 static sdp_t * ParseSDP( vlc_object_t *p_obj, char* psz_sdp )
1066 vlc_bool_t b_invalid = VLC_FALSE;
1067 vlc_bool_t b_end = VLC_FALSE;
1068 if( psz_sdp == NULL )
1073 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1075 msg_Warn( p_obj, "bad packet" );
1079 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1083 p_sdp->psz_sdp = strdup( psz_sdp );
1084 if( p_sdp->psz_sdp == NULL )
1090 p_sdp->psz_sessionname = NULL;
1091 p_sdp->psz_media = NULL;
1092 p_sdp->psz_connection = NULL;
1093 p_sdp->psz_uri = NULL;
1094 p_sdp->psz_address = NULL;
1095 p_sdp->psz_address_type= NULL;
1098 p_sdp->i_attributes = 0;
1099 p_sdp->pp_attributes = NULL;
1101 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1108 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1109 *psz_sdp == ' ' || *psz_sdp == '\t' )
1114 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1116 psz_eol = psz_sdp + strlen( psz_sdp );
1119 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1124 if( psz_eol <= psz_sdp )
1130 /* no space allowed between fields */
1131 if( psz_sdp[1] != '=' )
1133 msg_Warn( p_obj, "invalid packet" ) ;
1138 /* Now parse each line */
1139 switch( psz_sdp[0] )
1144 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1149 /* o field is <username> <session id> <version>
1150 * <network type> <address type> <address> */
1152 #define GET_FIELD( store ) \
1153 psz_eof = strchr( psz_parse, ' ' ); \
1156 *psz_eof=0; store = strdup( psz_parse ); \
1160 if( i_field != 5 ) \
1162 b_invalid = VLC_TRUE; break; \
1166 store = strdup( psz_parse ); \
1169 psz_parse = psz_eof + 1; i_field++;
1172 psz_parse = &psz_sdp[2];
1173 GET_FIELD( p_sdp->psz_username );
1174 GET_FIELD( psz_sess_id );
1176 p_sdp->i_session_id = atoll( psz_sess_id );
1178 FREE( psz_sess_id );
1180 GET_FIELD( psz_sess_id );
1181 FREE( psz_sess_id );
1183 GET_FIELD( p_sdp->psz_network_type );
1184 GET_FIELD( p_sdp->psz_address_type );
1185 GET_FIELD( p_sdp->psz_address );
1196 case( 'a' ): /* attribute */
1198 char *psz_eon = strchr( &psz_sdp[2], ':' );
1199 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1201 /* Attribute with value */
1206 p_attr->psz_field = strdup( &psz_sdp[2] );
1207 p_attr->psz_value = strdup( psz_eon );
1209 else /* Attribute without value */
1211 p_attr->psz_field = strdup( &psz_sdp[2] );
1212 p_attr->psz_value = NULL;
1215 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1219 case( 'm' ): /* Media announcement */
1221 /* If we have several medias, we pass the announcement to
1222 * LIVE.COM, so just count them */
1224 if( p_sdp->i_media == 1 )
1226 p_sdp->psz_media = strdup( &psz_sdp[2] );
1233 if( p_sdp->i_media > 1 )
1236 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1256 static int InitSocket( services_discovery_t *p_sd, char *psz_address,
1259 int i_fd = net_OpenUDP( p_sd, psz_address, i_port, NULL, 0 );
1263 net_StopSend( i_fd );
1264 INSERT_ELEM( p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1265 p_sd->p_sys->i_fd, i_fd );
1269 return VLC_EGENERIC;
1273 static int Decompress( unsigned char *psz_src, unsigned char **_dst, int i_len )
1275 int i_result, i_dstsize, n;
1276 unsigned char *psz_dst;
1279 d_stream.zalloc = (alloc_func)0;
1280 d_stream.zfree = (free_func)0;
1281 d_stream.opaque = (voidpf)0;
1283 i_result = inflateInit(&d_stream);
1284 if( i_result != Z_OK )
1286 printf( "inflateInit() failed. Result: %d\n", i_result );
1290 p_playlist->pp_items[p_playlist->i_index]->b_autodeletion = VLC_TRUE;
1291 i_position = p_playlist->i_index;
1293 /* Gather the complete sdp file */
1296 int i_read = stream_Read( p_demux->s, &p_sdp[i_sdp], i_sdp_max - i_sdp - 1 );
1298 d_stream.next_in = (Bytef *)psz_src;
1299 d_stream.avail_in = i_len;
1307 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1308 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1309 d_stream.avail_out = 1000;
1311 i_result = inflate(&d_stream, Z_NO_FLUSH);
1312 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1314 printf( "Zlib decompression failed. Result: %d\n", i_result );
1318 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1319 ( i_result != Z_STREAM_END ) );
1321 i_dstsize = d_stream.total_out;
1322 inflateEnd( &d_stream );
1324 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1331 static void FreeSDP( sdp_t *p_sdp )
1334 FREE( p_sdp->psz_sdp );
1335 FREE( p_sdp->psz_sessionname );
1336 FREE( p_sdp->psz_connection );
1337 FREE( p_sdp->psz_media );
1338 FREE( p_sdp->psz_uri );
1339 FREE( p_sdp->psz_username );
1340 FREE( p_sdp->psz_network_type );
1342 FREE( p_sdp->psz_address );
1343 FREE( p_sdp->psz_address_type );
1345 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1347 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1348 FREE( p_sdp->pp_attributes[i]->psz_field );
1349 FREE( p_sdp->pp_attributes[i]->psz_value );
1350 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1356 static int RemoveAnnounce( services_discovery_t *p_sd,
1357 sap_announce_t *p_announce )
1361 if( p_announce->p_sdp ) FreeSDP( p_announce->p_sdp );
1363 if( p_announce->i_item_id > -1 )
1365 playlist_LockDelete( p_sd->p_sys->p_playlist, p_announce->i_item_id );
1368 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1370 if( p_sd->p_sys->pp_announces[i] == p_announce )
1372 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1383 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1385 /* A session is identified by
1386 * username, session_id, network type, address type and address */
1387 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1388 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1389 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1390 p_sdp1->psz_address && p_sdp2->psz_address )
1392 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1393 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1394 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1395 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1396 p_sdp1->i_session_id == p_sdp2->i_session_id )
1412 static void CacheLoad( services_discovery_t *p_sd )
1414 msg_Warn( p_sd, "cache not implemented") ;
1417 static void CacheSave( services_discovery_t *p_sd )
1419 msg_Warn( p_sd, "cache not implemented") ;