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 *****************************************************************************/
28 #include <stdlib.h> /* malloc(), free() */
31 #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 /* FIXME: find a way to listen to link-local scope */
74 static const char ipv6_scopes[] = "1456789ABCDE";
77 /*****************************************************************************
79 *****************************************************************************/
80 #define SAP_ADDR_TEXT N_( "SAP multicast address" )
81 #define SAP_ADDR_LONGTEXT N_( "The SAP module normally chooses itself the " \
82 "right addresses to listen to. However, you " \
83 "can specify a specific address." )
84 #define SAP_IPV4_TEXT N_( "IPv4 SAP" )
85 #define SAP_IPV4_LONGTEXT N_( \
86 "Listen to IPv4 announcements " \
87 "on the standard address." )
88 #define SAP_IPV6_TEXT N_( "IPv6 SAP" )
89 #define SAP_IPV6_LONGTEXT N_( \
90 "Listen to IPv6 announcements " \
91 "on the standard addresses." )
92 #define SAP_SCOPE_TEXT N_( "IPv6 SAP scope" )
93 #define SAP_SCOPE_LONGTEXT N_( \
94 "Scope for IPv6 announcements (default is 8)." )
95 #define SAP_TIMEOUT_TEXT N_( "SAP timeout (seconds)" )
96 #define SAP_TIMEOUT_LONGTEXT N_( \
97 "Delay after which SAP items get deleted if no new announcement " \
99 #define SAP_PARSE_TEXT N_( "Try to parse the announce" )
100 #define SAP_PARSE_LONGTEXT N_( \
101 "This enables actual parsing of the announces by the SAP module. " \
102 "Otherwise, all announcements are parsed by the \"livedotcom\" " \
103 "(RTP/RTSP) module." )
104 #define SAP_STRICT_TEXT N_( "SAP Strict mode" )
105 #define SAP_STRICT_LONGTEXT N_( \
106 "When this is set, the SAP parser will discard some non-compliant " \
108 #define SAP_CACHE_TEXT N_("Use SAP cache")
109 #define SAP_CACHE_LONGTEXT N_( \
110 "This enables a SAP caching mechanism. " \
111 "This will result in lower SAP startup time, but you could end up " \
112 "with items corresponding to legacy streams." )
113 #define SAP_TIMESHIFT_TEXT N_("Allow timeshifting")
114 #define SAP_TIMESHIFT_LONGTEXT N_( "This automatically enables timeshifting " \
115 "for streams discovered through SAP announcements." )
118 static int Open ( vlc_object_t * );
119 static void Close( vlc_object_t * );
120 static int OpenDemux ( vlc_object_t * );
121 static void CloseDemux ( vlc_object_t * );
124 set_shortname( _("SAP"));
125 set_description( _("SAP Announcements") );
126 set_category( CAT_PLAYLIST );
127 set_subcategory( SUBCAT_PLAYLIST_SD );
129 add_string( "sap-addr", NULL, NULL,
130 SAP_ADDR_TEXT, SAP_ADDR_LONGTEXT, VLC_TRUE );
131 add_bool( "sap-ipv4", 1 , NULL,
132 SAP_IPV4_TEXT,SAP_IPV4_LONGTEXT, VLC_TRUE );
133 add_bool( "sap-ipv6", 1 , NULL,
134 SAP_IPV6_TEXT, SAP_IPV6_LONGTEXT, VLC_TRUE );
135 add_integer( "sap-timeout", 1800, NULL,
136 SAP_TIMEOUT_TEXT, SAP_TIMEOUT_LONGTEXT, VLC_TRUE );
137 add_bool( "sap-parse", 1 , NULL,
138 SAP_PARSE_TEXT,SAP_PARSE_LONGTEXT, VLC_TRUE );
139 add_bool( "sap-strict", 0 , NULL,
140 SAP_STRICT_TEXT,SAP_STRICT_LONGTEXT, VLC_TRUE );
142 add_bool( "sap-cache", 0 , NULL,
143 SAP_CACHE_TEXT,SAP_CACHE_LONGTEXT, VLC_TRUE );
145 add_bool( "sap-timeshift", 0 , NULL,
146 SAP_TIMESHIFT_TEXT,SAP_TIMESHIFT_LONGTEXT, VLC_TRUE );
148 set_capability( "services_discovery", 0 );
149 set_callbacks( Open, Close );
152 set_description( _("SDP file parser for UDP") );
153 add_shortcut( "sdp" );
154 set_capability( "demux2", 51 );
155 set_callbacks( OpenDemux, CloseDemux );
159 /*****************************************************************************
161 *****************************************************************************/
163 typedef struct sdp_t sdp_t;
164 typedef struct attribute_t attribute_t;
165 typedef struct sap_announce_t sap_announce_t;
167 /* The structure that contains sdp information */
173 char *psz_sessionname;
175 /* Raw m= and c= fields */
176 char *psz_connection;
181 char *psz_network_type;
182 char *psz_address_type;
184 int64_t i_session_id;
189 int i_in; /* IP version */
195 attribute_t **pp_attributes;
204 struct sap_announce_t
209 uint32_t i_source[4];
211 /* SAP annnounces must only contain one SDP */
219 struct services_discovery_sys_t
221 /* Socket descriptors */
226 playlist_item_t *p_node_cat;
227 playlist_item_t *p_node_one;
229 /* Table of announces */
231 struct sap_announce_t **pp_announces;
236 vlc_bool_t b_timeshift;
246 /*****************************************************************************
248 *****************************************************************************/
252 static int Demux( demux_t *p_demux );
253 static int Control( demux_t *, int, va_list );
254 static void Run ( services_discovery_t *p_sd );
256 /* Main parsing functions */
257 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp );
258 static int ParseSAP( services_discovery_t *p_sd, const uint8_t *p_buffer, size_t i_read );
259 static sdp_t *ParseSDP (vlc_object_t *p_sd, const char *psz_sdp);
260 static sap_announce_t *CreateAnnounce( services_discovery_t *, uint16_t, sdp_t * );
261 static int RemoveAnnounce( services_discovery_t *p_sd, sap_announce_t *p_announce );
263 /* Helper functions */
264 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search );
265 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 );
266 static int InitSocket( services_discovery_t *p_sd, const char *psz_address, int i_port );
267 static int Decompress( const unsigned char *psz_src, unsigned char **_dst, int i_len );
268 static void FreeSDP( sdp_t *p_sdp );
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 p_sys->i_timeout = var_CreateGetInteger( p_sd, "sap-timeout" );
287 p_sys->b_strict = var_CreateGetInteger( p_sd, "sap-strict");
288 p_sys->b_parse = var_CreateGetInteger( p_sd, "sap-parse" );
291 if( var_CreateGetInteger( p_sd, "sap-cache" ) )
297 /* Cache sap_timeshift value */
298 p_sys->b_timeshift = var_CreateGetInteger( p_sd, "sap-timeshift" )
299 ? VLC_TRUE : VLC_FALSE;
301 /* Create our playlist node */
304 playlist_NodesPairCreate( pl_Get( p_sd ), _("SAP sessions"),
305 &p_sys->p_node_cat, &p_sys->p_node_one,
308 p_sys->i_announces = 0;
309 p_sys->pp_announces = NULL;
314 /*****************************************************************************
315 * OpenDemux: initialize and create stuff
316 *****************************************************************************/
317 static int OpenDemux( vlc_object_t *p_this )
319 demux_t *p_demux = (demux_t *)p_this;
321 int i_max_sdp = 1024;
323 char *psz_sdp = NULL;
326 if( !var_CreateGetInteger( p_demux, "sap-parse" ) )
328 /* We want livedotcom module to parse this SDP file */
335 if( stream_Peek( p_demux->s, &p_peek, 7 ) < 7 ) return VLC_EGENERIC;
337 if( strncmp( (char*)p_peek, "v=0\r\n", 5 ) &&
338 strncmp( (char*)p_peek, "v=0\n", 4 ) &&
339 ( p_peek[0] < 'a' || p_peek[0] > 'z' || p_peek[1] != '=' ) )
345 psz_sdp = (char *)malloc( i_max_sdp );
346 if( !psz_sdp ) return VLC_EGENERIC;
348 /* Gather the complete sdp file */
351 int i_read = stream_Read( p_demux->s,
352 &psz_sdp[i_sdp], i_max_sdp - i_sdp - 1 );
356 msg_Err( p_demux, "failed to read SDP" );
362 if( i_read < i_max_sdp - i_sdp - 1 )
364 psz_sdp[i_sdp] = '\0';
369 psz_sdp = (char *)realloc( psz_sdp, i_max_sdp );
372 p_sdp = ParseSDP( VLC_OBJECT(p_demux), psz_sdp );
376 msg_Warn( p_demux, "invalid SDP");
380 if( p_sdp->i_media > 1 )
385 if( ParseConnection( VLC_OBJECT( p_demux ), p_sdp ) )
387 p_sdp->psz_uri = NULL;
389 if( p_sdp->i_media_type != 33 && p_sdp->i_media_type != 32 &&
390 p_sdp->i_media_type != 14 )
393 if( p_sdp->psz_uri == NULL ) goto error;
395 p_demux->p_sys = (demux_sys_t *)malloc( sizeof(demux_sys_t) );
396 p_demux->p_sys->p_sdp = p_sdp;
397 p_demux->pf_control = Control;
398 p_demux->pf_demux = Demux;
405 if( p_sdp ) FreeSDP( p_sdp ); p_sdp = NULL;
406 stream_Seek( p_demux->s, 0 );
410 /*****************************************************************************
412 *****************************************************************************/
413 static void Close( vlc_object_t *p_this )
415 services_discovery_t *p_sd = ( services_discovery_t* )p_this;
416 services_discovery_sys_t *p_sys = p_sd->p_sys;
420 for( i = p_sys->i_fd-1 ; i >= 0 ; i-- )
422 net_Close( p_sys->pi_fd[i] );
424 FREENULL( p_sys->pi_fd );
427 if( config_GetInt( p_sd, "sap-cache" ) )
433 for( i = p_sys->i_announces - 1; i>= 0; i-- )
435 RemoveAnnounce( p_sd, p_sys->pp_announces[i] );
437 FREENULL( p_sys->pp_announces );
439 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_cat, VLC_TRUE,
441 playlist_NodeDelete( pl_Get(p_sd), p_sys->p_node_one, VLC_TRUE,
447 /*****************************************************************************
448 * CloseDemux: Close the demuxer
449 *****************************************************************************/
450 static void CloseDemux( vlc_object_t *p_this )
452 demux_t *p_demux = (demux_t *)p_this;
455 if( p_demux->p_sys->p_sdp ) { FreeSDP( p_demux->p_sys->p_sdp ); p_demux->p_sys->p_sdp = NULL; }
456 free( p_demux->p_sys );
460 /*****************************************************************************
461 * Run: main SAP thread
462 *****************************************************************************
463 * Listens to SAP packets, and sends them to packet_handle
464 *****************************************************************************/
465 #define MAX_SAP_BUFFER 5000
467 static void Run( services_discovery_t *p_sd )
472 /* Braindead Winsock DNS resolver will get stuck over 2 seconds per failed
473 * DNS queries, even if the DNS server returns an error with milliseconds.
474 * You don't want to know why the bug (as of XP SP2) wasn't fixed since
475 * Winsock 1.1 from Windows 95, if not Windows 3.1.
476 * Anyway, to avoid a 30 seconds delay for failed IPv6 socket creation,
477 * we have to open sockets in Run() rather than Open(). */
478 if( var_CreateGetInteger( p_sd, "sap-ipv4" ) )
480 InitSocket( p_sd, SAP_V4_GLOBAL_ADDRESS, SAP_PORT );
481 InitSocket( p_sd, SAP_V4_ORG_ADDRESS, SAP_PORT );
482 InitSocket( p_sd, SAP_V4_LOCAL_ADDRESS, SAP_PORT );
483 InitSocket( p_sd, SAP_V4_LINK_ADDRESS, SAP_PORT );
485 if( var_CreateGetInteger( p_sd, "sap-ipv6" ) )
487 char psz_address[] = SAP_V6_1"0"SAP_V6_2;
490 for( c_scope = ipv6_scopes; *c_scope; c_scope++ )
492 psz_address[sizeof(SAP_V6_1) - 1] = *c_scope;
493 InitSocket( p_sd, psz_address, SAP_PORT );
497 psz_addr = var_CreateGetString( p_sd, "sap-addr" );
498 if( psz_addr && *psz_addr )
500 InitSocket( p_sd, psz_addr, SAP_PORT );
504 if( p_sd->p_sys->i_fd == 0 )
506 msg_Err( p_sd, "unable to listen on any address" );
510 /* read SAP packets */
511 while( !p_sd->b_die )
514 uint8_t p_buffer[MAX_SAP_BUFFER+1];
516 i_read = net_Select( p_sd, p_sd->p_sys->pi_fd, NULL,
517 p_sd->p_sys->i_fd, p_buffer,
518 MAX_SAP_BUFFER, 500000 );
520 /* Check for items that need deletion */
521 for( i = 0; i < p_sd->p_sys->i_announces; i++ )
523 mtime_t i_timeout = ( mtime_t ) 1000000 * p_sd->p_sys->i_timeout;
525 if( mdate() - p_sd->p_sys->pp_announces[i]->i_last > i_timeout )
527 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i] );
531 /* Minimum length is > 6 */
536 msg_Warn( p_sd, "socket read error" );
541 p_buffer[i_read] = '\0';
543 /* Parse the packet */
544 ParseSAP( p_sd, p_buffer, i_read );
548 /**********************************************************************
549 * Demux: reads and demuxes data packets
550 * Return -1 if error, 0 if EOF, 1 else
551 **********************************************************************/
552 static int Demux( demux_t *p_demux )
554 sdp_t *p_sdp = p_demux->p_sys->p_sdp;
555 input_thread_t *p_input;
556 input_item_t *p_parent_input;
558 playlist_t *p_playlist = pl_Yield( p_demux );
559 p_input = (input_thread_t *)vlc_object_find( p_demux, VLC_OBJECT_INPUT,
564 msg_Err( p_demux, "parent input could not be found" );
568 p_parent_input = p_input->input.p_item;
570 vlc_mutex_lock( &p_parent_input->lock );
571 FREENULL( p_parent_input->psz_uri );
572 p_parent_input->psz_uri = strdup( p_sdp->psz_uri );
573 FREENULL( p_parent_input->psz_name );
574 p_parent_input->psz_name = strdup( EnsureUTF8( p_sdp->psz_sessionname ) );
575 p_parent_input->i_type = ITEM_TYPE_NET;
577 if( p_playlist->status.p_item &&
578 p_playlist->status.p_item->p_input == p_parent_input )
580 playlist_Control( p_playlist, PLAYLIST_VIEWPLAY,
581 p_playlist->status.p_node, p_playlist->status.p_item );
584 vlc_mutex_unlock( &p_parent_input->lock );
585 vlc_object_release( p_input );
586 vlc_object_release( p_playlist );
591 static int Control( demux_t *p_demux, int i_query, va_list args )
596 /**************************************************************
598 **************************************************************/
600 /* i_read is at least > 6 */
601 static int ParseSAP( services_discovery_t *p_sd, const uint8_t *buf,
606 const uint8_t *end = buf + len;
609 assert (buf[len] == '\0');
614 uint8_t flags = buf[0];
616 /* First, check the sap announce is correct */
617 if ((flags >> 5) != 1)
620 vlc_bool_t b_ipv6 = (flags & 0x10) != 0;
621 vlc_bool_t b_need_delete = (flags & 0x04) != 0;
625 msg_Dbg( p_sd, "encrypted packet, unsupported" );
629 vlc_bool_t b_compressed = (flags & 0x01) != 0;
631 uint16_t i_hash = U16_AT (buf + 2);
633 if( p_sd->p_sys->b_strict && i_hash == 0 )
635 msg_Dbg( p_sd, "strict mode, discarding announce with null id hash");
639 // Skips source address and auth data
640 buf += 4 + (b_ipv6 ? 16 : 4) + buf[1];
644 uint8_t *decomp = NULL;
647 int newsize = Decompress (buf, &decomp, end - buf);
650 msg_Warn( p_sd, "decompression of sap packet failed" );
654 decomp = realloc (decomp, newsize + 1);
655 decomp[newsize++] = '\0';
657 psz_sdp = (const char *)decomp;
662 psz_sdp = (const char *)buf;
666 assert (buf[len] == '\0');
668 /* Skip payload type */
669 /* SAPv1 has implicit "application/sdp" payload type: first line is v=0 */
670 if (strncmp (psz_sdp, "v=0", 3))
672 size_t clen = strlen (psz_sdp) + 1;
674 if (strcmp (psz_sdp, "application/sdp"))
676 msg_Dbg (p_sd, "unsupported content type: %s", psz_sdp);
680 // skips content type
689 p_sdp = ParseSDP( VLC_OBJECT(p_sd), psz_sdp );
696 /* Decide whether we should add a playlist item for this SDP */
697 /* Parse connection information (c= & m= ) */
698 if( ParseConnection( VLC_OBJECT(p_sd), p_sdp ) )
700 p_sdp->psz_uri = NULL;
703 /* Multi-media or no-parse -> pass to LIVE.COM */
704 if( p_sdp->i_media > 1 || ( p_sdp->i_media_type != 14 &&
705 p_sdp->i_media_type != 32 &&
706 p_sdp->i_media_type != 33) ||
707 p_sd->p_sys->b_parse == VLC_FALSE )
709 if( p_sdp->psz_uri ) free( p_sdp->psz_uri );
710 asprintf( &p_sdp->psz_uri, "sdp://%s", p_sdp->psz_sdp );
713 if( p_sdp->psz_uri == NULL ) return VLC_EGENERIC;
715 for( i = 0 ; i< p_sd->p_sys->i_announces ; i++ )
718 /* FIXME: we create a new announce each time the sdp changes */
719 if( IsSameSession( p_sd->p_sys->pp_announces[i]->p_sdp, p_sdp ) )
723 RemoveAnnounce( p_sd, p_sd->p_sys->pp_announces[i]);
727 p_sd->p_sys->pp_announces[i]->i_last = mdate();
729 FreeSDP( p_sdp ); p_sdp = NULL;
734 if( p_sdp->i_media > 1 )
736 msg_Dbg( p_sd, "passing to liveMedia" );
739 CreateAnnounce( p_sd, i_hash, p_sdp );
745 sap_announce_t *CreateAnnounce( services_discovery_t *p_sd, uint16_t i_hash,
748 input_item_t *p_input;
749 playlist_item_t *p_item, *p_child;
751 sap_announce_t *p_sap = (sap_announce_t *)malloc(
752 sizeof(sap_announce_t ) );
753 services_discovery_sys_t *p_sys;
759 EnsureUTF8( p_sdp->psz_sessionname );
760 p_sap->i_last = mdate();
761 p_sap->i_hash = i_hash;
762 p_sap->p_sdp = p_sdp;
764 /* Create the actual playlist item here */
765 p_input = input_ItemNewWithType( VLC_OBJECT(p_sd),
766 p_sap->p_sdp->psz_uri,
767 p_sdp->psz_sessionname,
768 0, NULL, -1, ITEM_TYPE_NET );
769 p_sap->i_input_id = p_input->i_id;
776 if( p_sys->b_timeshift )
777 input_ItemAddOption( p_input, ":access-filter=timeshift" );
779 psz_value = GetAttribute( p_sap->p_sdp, "tool" );
780 if( psz_value != NULL )
782 input_ItemAddInfo( p_input, _("Session"),_("Tool"), psz_value );
784 if( strcmp( p_sdp->psz_username, "-" ) )
786 input_ItemAddInfo( p_input, _("Session"),
787 _("User"), p_sdp->psz_username );
791 psz_value = GetAttribute( p_sap->p_sdp, "x-plgroup" );
792 if( psz_value == NULL )
793 psz_value = GetAttribute( p_sap->p_sdp, "plgroup" );
795 if( psz_value != NULL )
797 EnsureUTF8( psz_value );
799 p_child = playlist_ChildSearchName( p_sys->p_node_cat, psz_value );
801 if( p_child == NULL )
803 p_child = playlist_NodeCreate( pl_Get( p_sd ), psz_value,
805 p_child->i_flags &= ~PLAYLIST_SKIP_FLAG;
810 p_child = p_sys->p_node_cat;
813 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input, p_child,
814 PLAYLIST_APPEND, PLAYLIST_END );
815 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
816 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
817 p_sap->i_item_id_cat = p_item->i_id;
819 p_item = playlist_NodeAddInput( pl_Get( p_sd ), p_input,
820 p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END );
821 p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
822 p_item->i_flags &= ~PLAYLIST_SAVE_FLAG;
823 p_sap->i_item_id_one = p_item->i_id;
825 TAB_APPEND( p_sys->i_announces, p_sys->pp_announces, p_sap );
830 static char *GetAttribute( sdp_t *p_sdp, const char *psz_search )
834 for( i = 0 ; i< p_sdp->i_attributes; i++ )
836 if( !strncmp( p_sdp->pp_attributes[i]->psz_field, psz_search,
837 strlen( p_sdp->pp_attributes[i]->psz_field ) ) )
839 return p_sdp->pp_attributes[i]->psz_value;
846 /* Fill p_sdp->psz_uri */
847 static int ParseConnection( vlc_object_t *p_obj, sdp_t *p_sdp )
849 char *psz_eof = NULL;
850 char *psz_parse = NULL;
852 char *psz_proto = NULL;
856 if( p_sdp->psz_connection )
862 * NOTE: we ignore the TTL parameter on-purpose, as some SAP
863 * advertisers don't include it (and it is utterly useless).
865 if (sscanf (p_sdp->psz_connection, "IN IP%d %1023[^/]", &ipv,
868 msg_Warn (p_obj, "unable to parse c field: \"%s\"",
869 p_sdp->psz_connection);
880 msg_Warn (p_obj, "unknown IP version %d", ipv);
884 if (strchr (hostname, ':') != NULL)
885 sprintf (psz_uri, "[%s]", hostname);
887 strcpy (psz_uri, hostname);
891 if( p_sdp->psz_media )
893 psz_parse = p_sdp->psz_media;
895 psz_eof = strchr( psz_parse, ' ' );
902 * That's ugly. We should go through every media, and make sure
903 * at least one of them is audio or video. In the mean time, I
904 * need to accept data too.
906 if( strncmp( psz_parse, "audio", 5 )
907 && strncmp( psz_parse, "video", 5 )
908 && strncmp( psz_parse, "data", 4 ) )
910 msg_Warn( p_obj, "unhandled media type \"%s\"", psz_parse );
914 psz_parse = psz_eof + 1;
918 msg_Warn( p_obj, "unable to parse m field (1)");
922 psz_eof = strchr( psz_parse, ' ' );
928 /* FIXME : multiple port ! */
929 i_port = atoi( psz_parse );
931 if( i_port <= 0 || i_port >= 65536 )
933 msg_Warn( p_obj, "invalid transport port %i", i_port );
936 psz_parse = psz_eof + 1;
940 msg_Warn( p_obj, "unable to parse m field (2)");
944 psz_eof = strchr( psz_parse, ' ' );
949 psz_proto = strdup( psz_parse );
951 psz_parse = psz_eof + 1;
952 p_sdp->i_media_type = atoi( psz_parse );
957 msg_Dbg( p_obj, "incorrect m field, %s", p_sdp->psz_media );
958 p_sdp->i_media_type = 33;
959 psz_proto = strdup( psz_parse );
963 if( psz_proto && !strncmp( psz_proto, "RTP/AVP", 7 ) )
966 psz_proto = strdup( "rtp" );
968 if( psz_proto && !strncasecmp( psz_proto, "UDP", 3 ) )
971 psz_proto = strdup( "udp" );
974 /* FIXME: HTTP support */
981 /* handle SSM case */
982 psz_parse = GetAttribute( p_sdp, "source-filter" );
983 char psz_source[258] = "";
984 if (psz_parse != NULL)
986 char psz_source_ip[256];
988 if (sscanf (psz_parse, " incl IN IP%*c %*s %255s ", psz_source_ip) == 1)
990 if (strchr (psz_source_ip, ':') != NULL)
991 sprintf (psz_source, "[%s]", psz_source_ip);
993 strcpy (psz_source, psz_source_ip);
997 asprintf( &p_sdp->psz_uri, "%s://%s@%s:%i", psz_proto, psz_source,
1000 FREENULL( psz_proto );
1004 /***********************************************************************
1005 * ParseSDP : SDP parsing
1006 * *********************************************************************
1007 * Validate SDP and parse all fields
1008 ***********************************************************************/
1009 static sdp_t *ParseSDP (vlc_object_t *p_obj, const char *psz_sdp)
1012 vlc_bool_t b_invalid = VLC_FALSE;
1013 vlc_bool_t b_end = VLC_FALSE;
1014 if( psz_sdp == NULL )
1019 if( psz_sdp[0] != 'v' || psz_sdp[1] != '=' )
1021 msg_Warn( p_obj, "bad packet" );
1025 p_sdp = (sdp_t *)malloc( sizeof( sdp_t ) );
1029 p_sdp->psz_sdp = strdup( psz_sdp );
1030 if( p_sdp->psz_sdp == NULL )
1036 p_sdp->psz_sessionname = NULL;
1037 p_sdp->psz_media = NULL;
1038 p_sdp->psz_connection = NULL;
1039 p_sdp->psz_uri = NULL;
1040 p_sdp->psz_address = NULL;
1041 p_sdp->psz_address_type= NULL;
1044 p_sdp->i_attributes = 0;
1045 p_sdp->pp_attributes = NULL;
1047 while( *psz_sdp != '\0' && b_end == VLC_FALSE )
1054 while( *psz_sdp == '\r' || *psz_sdp == '\n' ||
1055 *psz_sdp == ' ' || *psz_sdp == '\t' )
1060 if( ( psz_eol = strchr( psz_sdp, '\n' ) ) == NULL )
1062 psz_eol = psz_sdp + strlen( psz_sdp );
1065 if( psz_eol > psz_sdp && *( psz_eol - 1 ) == '\r' )
1070 if( psz_eol <= psz_sdp )
1076 /* no space allowed between fields */
1077 if( psz_sdp[1] != '=' )
1079 msg_Warn( p_obj, "invalid packet" ) ;
1080 FreeSDP( p_sdp ); p_sdp = NULL;
1084 /* Now parse each line */
1085 switch( psz_sdp[0] )
1090 p_sdp->psz_sessionname = strdup( &psz_sdp[2] );
1095 /* o field is <username> <session id> <version>
1096 * <network type> <address type> <address> */
1098 #define GET_FIELD( store ) \
1099 psz_eof = strchr( psz_parse, ' ' ); \
1102 *psz_eof=0; store = strdup( psz_parse ); \
1106 if( i_field != 5 ) \
1108 b_invalid = VLC_TRUE; break; \
1112 store = strdup( psz_parse ); \
1115 psz_parse = psz_eof + 1; i_field++;
1118 psz_parse = &psz_sdp[2];
1119 GET_FIELD( p_sdp->psz_username );
1120 GET_FIELD( psz_sess_id );
1122 p_sdp->i_session_id = atoll( psz_sess_id );
1124 FREENULL( psz_sess_id );
1126 GET_FIELD( psz_sess_id );
1127 FREENULL( psz_sess_id );
1129 GET_FIELD( p_sdp->psz_network_type );
1130 GET_FIELD( p_sdp->psz_address_type );
1131 GET_FIELD( p_sdp->psz_address );
1142 case( 'a' ): /* attribute */
1144 char *psz_eon = strchr( &psz_sdp[2], ':' );
1145 attribute_t *p_attr = malloc( sizeof( attribute_t ) );
1147 /* Attribute with value */
1152 p_attr->psz_field = strdup( &psz_sdp[2] );
1153 p_attr->psz_value = strdup( psz_eon );
1155 else /* Attribute without value */
1157 p_attr->psz_field = strdup( &psz_sdp[2] );
1158 p_attr->psz_value = NULL;
1161 TAB_APPEND( p_sdp->i_attributes, p_sdp->pp_attributes, p_attr );
1165 case( 'm' ): /* Media announcement */
1167 /* If we have several medias, we pass the announcement to
1168 * LIVE.COM, so just count them */
1170 if( p_sdp->i_media == 1 )
1172 p_sdp->psz_media = strdup( &psz_sdp[2] );
1179 if( p_sdp->psz_connection != NULL ) // FIXME
1182 p_sdp->psz_connection = strdup( &psz_sdp[2] );
1192 FreeSDP( p_sdp ); p_sdp = NULL;
1202 static int InitSocket( services_discovery_t *p_sd, const char *psz_address,
1205 int i_fd = net_ListenUDP1 ((vlc_object_t *)p_sd, psz_address, i_port);
1207 return VLC_EGENERIC;
1209 net_StopSend( i_fd );
1210 INSERT_ELEM (p_sd->p_sys->pi_fd, p_sd->p_sys->i_fd,
1211 p_sd->p_sys->i_fd, i_fd);
1215 static int Decompress( const unsigned char *psz_src, unsigned char **_dst, int i_len )
1218 int i_result, i_dstsize, n;
1219 unsigned char *psz_dst;
1222 d_stream.zalloc = (alloc_func)0;
1223 d_stream.zfree = (free_func)0;
1224 d_stream.opaque = (voidpf)0;
1226 i_result = inflateInit(&d_stream);
1227 if( i_result != Z_OK )
1230 d_stream.next_in = (Bytef *)psz_src;
1231 d_stream.avail_in = i_len;
1239 psz_dst = (unsigned char *)realloc( psz_dst, n * 1000 );
1240 d_stream.next_out = (Bytef *)&psz_dst[(n - 1) * 1000];
1241 d_stream.avail_out = 1000;
1243 i_result = inflate(&d_stream, Z_NO_FLUSH);
1244 if( ( i_result != Z_OK ) && ( i_result != Z_STREAM_END ) )
1247 while( ( d_stream.avail_out == 0 ) && ( d_stream.avail_in != 0 ) &&
1248 ( i_result != Z_STREAM_END ) );
1250 i_dstsize = d_stream.total_out;
1251 inflateEnd( &d_stream );
1253 *_dst = (unsigned char *)realloc( psz_dst, i_dstsize );
1265 static void FreeSDP( sdp_t *p_sdp )
1268 FREENULL( p_sdp->psz_sdp );
1269 FREENULL( p_sdp->psz_sessionname );
1270 FREENULL( p_sdp->psz_connection );
1271 FREENULL( p_sdp->psz_media );
1272 FREENULL( p_sdp->psz_uri );
1273 FREENULL( p_sdp->psz_username );
1274 FREENULL( p_sdp->psz_network_type );
1276 FREENULL( p_sdp->psz_address );
1277 FREENULL( p_sdp->psz_address_type );
1279 for( i= p_sdp->i_attributes - 1; i >= 0 ; i-- )
1281 struct attribute_t *p_attr = p_sdp->pp_attributes[i];
1282 FREENULL( p_sdp->pp_attributes[i]->psz_field );
1283 FREENULL( p_sdp->pp_attributes[i]->psz_value );
1284 REMOVE_ELEM( p_sdp->pp_attributes, p_sdp->i_attributes, i);
1290 static int RemoveAnnounce( services_discovery_t *p_sd,
1291 sap_announce_t *p_announce )
1295 if( p_announce->p_sdp )
1297 FreeSDP( p_announce->p_sdp );
1298 p_announce->p_sdp = NULL;
1301 if( p_announce->i_input_id > -1 )
1302 playlist_LockDeleteAllFromInput( pl_Get(p_sd), p_announce->i_input_id );
1304 for( i = 0; i< p_sd->p_sys->i_announces; i++)
1306 if( p_sd->p_sys->pp_announces[i] == p_announce )
1308 REMOVE_ELEM( p_sd->p_sys->pp_announces, p_sd->p_sys->i_announces,
1319 static vlc_bool_t IsSameSession( sdp_t *p_sdp1, sdp_t *p_sdp2 )
1321 /* A session is identified by
1322 * username, session_id, network type, address type and address */
1323 if( p_sdp1->psz_username && p_sdp2->psz_username &&
1324 p_sdp1->psz_network_type && p_sdp2->psz_network_type &&
1325 p_sdp1->psz_address_type && p_sdp2->psz_address_type &&
1326 p_sdp1->psz_address && p_sdp2->psz_address )
1328 if(!strcmp( p_sdp1->psz_username , p_sdp2->psz_username ) &&
1329 !strcmp( p_sdp1->psz_network_type , p_sdp2->psz_network_type ) &&
1330 !strcmp( p_sdp1->psz_address_type , p_sdp2->psz_address_type ) &&
1331 !strcmp( p_sdp1->psz_address , p_sdp2->psz_address ) &&
1332 p_sdp1->i_session_id == p_sdp2->i_session_id )