1 /*****************************************************************************
2 * udp.c: raw UDP & RTP input module
3 *****************************************************************************
4 * Copyright (C) 2001-2004 VideoLAN
7 * Authors: Christophe Massiot <massiot@via.ecp.fr>
8 * Tristan Leteurtre <tooney@via.ecp.fr>
9 * Laurent Aimar <fenrir@via.ecp.fr>
11 * Reviewed: 23 October 2003, Jean-Paul Saman <jpsaman@wxs.nl>
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
26 *****************************************************************************/
28 /*****************************************************************************
30 *****************************************************************************/
34 #include <vlc/input.h>
38 /*****************************************************************************
40 *****************************************************************************/
41 #define CACHING_TEXT N_("Caching value in ms")
42 #define CACHING_LONGTEXT N_( \
43 "Allows you to modify the default caching value for UDP streams. This " \
44 "value should be set in millisecond units." )
46 #define AUTO_MTU_TEXT N_("Autodetection of MTU")
47 #define AUTO_MTU_LONGTEXT N_( \
48 "Allows growing the MTU if truncated packets are found" )
50 static int Open ( vlc_object_t * );
51 static void Close( vlc_object_t * );
54 set_shortname( _("UDP/RTP" ) );
55 set_description( _("UDP/RTP input") );
56 set_category( CAT_INPUT );
57 set_subcategory( SUBCAT_INPUT_ACCESS );
59 add_integer( "udp-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
60 CACHING_LONGTEXT, VLC_TRUE );
61 add_bool( "udp-auto-mtu", 1, NULL,
62 AUTO_MTU_TEXT, AUTO_MTU_LONGTEXT, VLC_TRUE );
64 set_capability( "access2", 0 );
65 add_shortcut( "udp" );
66 add_shortcut( "udpstream" );
67 add_shortcut( "udp4" );
68 add_shortcut( "udp6" );
69 add_shortcut( "rtp" );
70 add_shortcut( "rtp4" );
71 add_shortcut( "rtp6" );
72 set_callbacks( Open, Close );
75 /*****************************************************************************
77 *****************************************************************************/
78 #define RTP_HEADER_LEN 12
80 static block_t *BlockUDP( access_t * );
81 static block_t *BlockRTP( access_t * );
82 static block_t *BlockChoose( access_t * );
83 static int Control( access_t *, int, va_list );
90 vlc_bool_t b_auto_mtu;
93 /*****************************************************************************
94 * Open: open the socket
95 *****************************************************************************/
96 static int Open( vlc_object_t *p_this )
98 access_t *p_access = (access_t*)p_this;
101 char *psz_name = strdup( p_access->psz_path );
102 char *psz_parser = psz_name;
103 char *psz_server_addr = "";
104 char *psz_server_port = "";
105 char *psz_bind_addr = "";
106 char *psz_bind_port = "";
108 int i_server_port = 0;
111 /* First set ipv4/ipv6 */
112 var_Create( p_access, "ipv4", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
113 var_Create( p_access, "ipv6", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
115 if( *p_access->psz_access )
118 /* Find out which shortcut was used */
119 if( !strncmp( p_access->psz_access, "udp4", 6 ) ||
120 !strncmp( p_access->psz_access, "rtp4", 6 ))
122 val.b_bool = VLC_TRUE;
123 var_Set( p_access, "ipv4", val );
125 val.b_bool = VLC_FALSE;
126 var_Set( p_access, "ipv6", val );
128 else if( !strncmp( p_access->psz_access, "udp6", 6 ) ||
129 !strncmp( p_access->psz_access, "rtp6", 6 ) )
131 val.b_bool = VLC_TRUE;
132 var_Set( p_access, "ipv6", val );
134 val.b_bool = VLC_FALSE;
135 var_Set( p_access, "ipv4", val );
139 /* Parse psz_name syntax :
140 * [serveraddr[:serverport]][@[bindaddr]:[bindport]] */
141 if( *psz_parser && *psz_parser != '@' )
144 psz_server_addr = psz_parser;
146 while( *psz_parser && *psz_parser != ':' && *psz_parser != '@' )
148 if( *psz_parser == '[' )
151 while( *psz_parser && *psz_parser != ']' )
159 if( *psz_parser == ':' )
161 /* Found server port */
162 *psz_parser++ = '\0'; /* Terminate server name */
163 psz_server_port = psz_parser;
165 while( *psz_parser && *psz_parser != '@' )
172 if( *psz_parser == '@' )
174 /* Found bind address or bind port */
175 *psz_parser++ = '\0'; /* Terminate server port or name if necessary */
177 if( *psz_parser && *psz_parser != ':' )
179 /* Found bind address */
180 psz_bind_addr = psz_parser;
182 while( *psz_parser && *psz_parser != ':' )
184 if( *psz_parser == '[' )
187 while( *psz_parser && *psz_parser != ']' )
196 if( *psz_parser == ':' )
198 /* Found bind port */
199 *psz_parser++ = '\0'; /* Terminate bind address if necessary */
200 psz_bind_port = psz_parser;
204 i_server_port = strtol( psz_server_port, NULL, 10 );
205 if( ( i_bind_port = strtol( psz_bind_port, NULL, 10 ) ) == 0 )
207 i_bind_port = var_CreateGetInteger( p_access, "server-port" );
210 msg_Dbg( p_access, "opening server=%s:%d local=%s:%d",
211 psz_server_addr, i_server_port, psz_bind_addr, i_bind_port );
213 /* Set up p_access */
214 p_access->pf_read = NULL;
215 if( !strcasecmp( p_access->psz_access, "rtp" )
216 || !strcasecmp( p_access->psz_access, "rtp4" )
217 || !strcasecmp( p_access->psz_access, "rtp6" ) )
219 p_access->pf_block = BlockRTP;
223 p_access->pf_block = BlockChoose;
225 p_access->pf_control = Control;
226 p_access->pf_seek = NULL;
227 p_access->info.i_update = 0;
228 p_access->info.i_size = 0;
229 p_access->info.i_pos = 0;
230 p_access->info.b_eof = VLC_FALSE;
231 p_access->info.i_title = 0;
232 p_access->info.i_seekpoint = 0;
234 p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
235 p_sys->fd = net_OpenUDP( p_access, psz_bind_addr, i_bind_port,
236 psz_server_addr, i_server_port );
239 msg_Err( p_access, "cannot open socket" );
247 p_sys->i_mtu = var_CreateGetInteger( p_access, "mtu" );
248 if( p_sys->i_mtu <= 1 )
249 p_sys->i_mtu = 1500; /* Avoid problem */
251 p_sys->b_auto_mtu = var_CreateGetBool( p_access, "udp-auto-mtu" );;
253 /* Update default_pts to a suitable value for udp access */
254 var_Create( p_access, "udp-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
259 /*****************************************************************************
260 * Close: free unused data structures
261 *****************************************************************************/
262 static void Close( vlc_object_t *p_this )
264 access_t *p_access = (access_t*)p_this;
265 access_sys_t *p_sys = p_access->p_sys;
267 net_Close( p_sys->fd );
271 /*****************************************************************************
273 *****************************************************************************/
274 static int Control( access_t *p_access, int i_query, va_list args )
276 access_sys_t *p_sys = p_access->p_sys;
284 case ACCESS_CAN_SEEK:
285 case ACCESS_CAN_FASTSEEK:
286 case ACCESS_CAN_PAUSE:
287 case ACCESS_CAN_CONTROL_PACE:
288 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
289 *pb_bool = VLC_FALSE;
293 pi_int = (int*)va_arg( args, int * );
294 *pi_int = p_sys->i_mtu;
297 case ACCESS_GET_PTS_DELAY:
298 pi_64 = (int64_t*)va_arg( args, int64_t * );
299 *pi_64 = var_GetInteger( p_access, "udp-caching" ) * 1000;
303 case ACCESS_SET_PAUSE_STATE:
304 case ACCESS_GET_TITLE_INFO:
305 case ACCESS_SET_TITLE:
306 case ACCESS_SET_SEEKPOINT:
307 case ACCESS_SET_PRIVATE_ID_STATE:
311 msg_Warn( p_access, "unimplemented query in control" );
318 /*****************************************************************************
320 *****************************************************************************/
321 static block_t *BlockUDP( access_t *p_access )
323 access_sys_t *p_sys = p_access->p_sys;
327 p_block = block_New( p_access, p_sys->i_mtu );
328 p_block->i_buffer = net_Read( p_access, p_sys->fd, NULL,
329 p_block->p_buffer, p_sys->i_mtu,
331 if( p_block->i_buffer <= 0 )
333 block_Release( p_block );
337 if( p_block->i_buffer >= p_sys->i_mtu && p_sys->b_auto_mtu &&
338 p_sys->i_mtu < 32767 )
340 /* Increase by 100% */
342 msg_Dbg( p_access, "increasing MTU to %d", p_sys->i_mtu );
348 /*****************************************************************************
349 * BlockParseRTP/BlockRTP:
350 *****************************************************************************/
351 static block_t *BlockParseRTP( access_t *p_access, block_t *p_block )
358 if( p_block->i_buffer < RTP_HEADER_LEN )
361 /* Parse the header and make some verifications.
362 * See RFC 1889 & RFC 2250. */
363 i_rtp_version = ( p_block->p_buffer[0] & 0xC0 ) >> 6;
364 i_CSRC_count = ( p_block->p_buffer[0] & 0x0F );
365 i_payload_type = ( p_block->p_buffer[1] & 0x7F );
367 if ( i_rtp_version != 2 )
368 msg_Dbg( p_access, "RTP version is %u, should be 2", i_rtp_version );
370 if( i_payload_type == 14 )
372 else if( i_payload_type != 33 && i_payload_type != 32 )
373 msg_Dbg( p_access, "unsupported RTP payload type (%u)", i_payload_type );
375 i_skip += RTP_HEADER_LEN + 4*i_CSRC_count;
377 /* A CSRC extension field is 32 bits in size (4 bytes) */
378 if( i_skip >= p_block->i_buffer )
381 /* Return the packet without the RTP header. */
382 p_block->i_buffer -= i_skip;
383 p_block->p_buffer += i_skip;
388 msg_Warn( p_access, "received a too short packet for RTP" );
389 block_Release( p_block );
393 static block_t *BlockRTP( access_t *p_access )
395 return BlockParseRTP( p_access, BlockUDP( p_access ) );
398 /*****************************************************************************
399 * BlockChoose: decide between RTP and UDP
400 *****************************************************************************/
401 static block_t *BlockChoose( access_t *p_access )
408 if( ( p_block = BlockUDP( p_access ) ) == NULL )
411 if( p_block->p_buffer[0] == 0x47 )
413 msg_Dbg( p_access, "detected TS over raw UDP" );
414 p_access->pf_block = BlockUDP;
418 if( p_block->i_buffer < RTP_HEADER_LEN )
421 /* Parse the header and make some verifications.
422 * See RFC 1889 & RFC 2250. */
424 i_rtp_version = ( p_block->p_buffer[0] & 0xC0 ) >> 6;
425 i_CSRC_count = ( p_block->p_buffer[0] & 0x0F );
426 i_payload_type = ( p_block->p_buffer[1] & 0x7F );
428 if( i_rtp_version != 2 )
430 msg_Dbg( p_access, "no supported RTP header detected" );
431 p_access->pf_block = BlockUDP;
435 switch( i_payload_type )
438 msg_Dbg( p_access, "detected TS over RTP" );
439 p_access->psz_demux = strdup( "ts" );
443 msg_Dbg( p_access, "detected MPEG audio over RTP" );
444 p_access->psz_demux = strdup( "mpga" );
448 msg_Dbg( p_access, "detected MPEG video over RTP" );
449 p_access->psz_demux = strdup( "mpgv" );
453 msg_Dbg( p_access, "no RTP header detected" );
454 p_access->pf_block = BlockUDP;
458 p_access->pf_block = BlockRTP;
460 return BlockParseRTP( p_access, p_block );