1 /*****************************************************************************
2 * ftp.c: FTP input module
3 *****************************************************************************
4 * Copyright (C) 2001-2004 VideoLAN
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
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 *****************************************************************************/
30 #include <vlc/input.h>
34 /*****************************************************************************
36 *****************************************************************************/
37 static int Open ( vlc_object_t * );
38 static void Close( vlc_object_t * );
40 #define CACHING_TEXT N_("Caching value in ms")
41 #define CACHING_LONGTEXT N_( \
42 "Allows you to modify the default caching value for FTP streams. This " \
43 "value should be set in millisecond units." )
44 #define USER_TEXT N_("FTP user name")
45 #define USER_LONGTEXT N_("Allows you to modify the user name that will " \
46 "be used for the connection.")
47 #define PASS_TEXT N_("FTP password")
48 #define PASS_LONGTEXT N_("Allows you to modify the password that will be " \
49 "used for the connection.")
50 #define ACCOUNT_TEXT N_("FTP account")
51 #define ACCOUNT_LONGTEXT N_("Allows you to modify the account that will be " \
52 "used for the connection.")
55 set_description( _("FTP input") );
56 set_capability( "access2", 0 );
57 add_integer( "ftp-caching", 2 * DEFAULT_PTS_DELAY / 1000, NULL,
58 CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
59 add_string( "ftp-user", "anonymous", NULL, USER_TEXT, USER_LONGTEXT,
61 add_string( "ftp-pwd", "anonymous@dummy.org", NULL, PASS_TEXT,
62 PASS_LONGTEXT, VLC_FALSE );
63 add_string( "ftp-account", "anonymous", NULL, ACCOUNT_TEXT,
64 ACCOUNT_LONGTEXT, VLC_FALSE );
65 add_shortcut( "ftp" );
66 set_callbacks( Open, Close );
69 /*****************************************************************************
71 *****************************************************************************/
72 static int Read( access_t *, uint8_t *, int );
73 static int Seek( access_t *, int64_t );
74 static int Control( access_t *, int, va_list );
84 static int ftp_SendCommand( access_t *, char *, ... );
85 static int ftp_ReadCommand( access_t *, int *, char ** );
86 static int ftp_StartStream( access_t *, int64_t );
87 static int ftp_StopStream ( access_t *);
89 /****************************************************************************
90 * Open: connect to ftp server and ask for file
91 ****************************************************************************/
92 static int Open( vlc_object_t *p_this )
94 access_t *p_access = (access_t*)p_this;
103 p_access->pf_read = Read;
104 p_access->pf_block = NULL;
105 p_access->pf_seek = Seek;
106 p_access->pf_control = Control;
107 p_access->info.i_update = 0;
108 p_access->info.i_size = 0;
109 p_access->info.i_pos = 0;
110 p_access->info.b_eof = VLC_FALSE;
111 p_access->info.i_title = 0;
112 p_access->info.i_seekpoint = 0;
113 p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
114 memset( p_sys, 0, sizeof( access_sys_t ) );
118 /* *** Parse URL and get server addr/port and path *** */
119 psz = p_access->psz_path;
124 vlc_UrlParse( &p_sys->url, psz, 0 );
126 if( p_sys->url.psz_host == NULL || *p_sys->url.psz_host == '\0' )
128 msg_Err( p_access, "invalid server name" );
131 if( p_sys->url.i_port <= 0 )
133 p_sys->url.i_port = 21; /* default port */
136 /* *** Open a TCP connection with server *** */
137 msg_Dbg( p_access, "waiting for connection..." );
138 p_sys->fd_cmd = net_OpenTCP( p_access, p_sys->url.psz_host,
140 if( p_sys->fd_cmd < 0 )
142 msg_Err( p_access, "failed to connect with server" );
148 if( ftp_ReadCommand( p_access, &i_answer, NULL ) != 1 )
153 if( i_answer / 100 != 2 )
155 msg_Err( p_access, "connection rejected" );
159 msg_Dbg( p_access, "connection accepted (%d)", i_answer );
161 var_Create( p_access, "ftp-user", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
162 var_Get( p_access, "ftp-user", &val );
163 if( ftp_SendCommand( p_access, "USER %s", val.psz_string ) < 0 ||
164 ftp_ReadCommand( p_access, &i_answer, NULL ) < 0 )
166 if( val.psz_string ) free( val.psz_string );
169 if( val.psz_string ) free( val.psz_string );
171 switch( i_answer / 100 )
174 msg_Dbg( p_access, "user accepted" );
177 msg_Dbg( p_access, "password needed" );
178 var_Create( p_access, "ftp-pwd", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
179 var_Get( p_access, "ftp-pwd", &val );
180 if( ftp_SendCommand( p_access, "PASS %s", val.psz_string ) < 0 ||
181 ftp_ReadCommand( p_access, &i_answer, NULL ) < 0 )
183 if( val.psz_string ) free( val.psz_string );
186 if( val.psz_string ) free( val.psz_string );
188 switch( i_answer / 100 )
191 msg_Dbg( p_access, "password accepted" );
194 msg_Dbg( p_access, "account needed" );
195 var_Create( p_access, "ftp-account",
196 VLC_VAR_STRING | VLC_VAR_DOINHERIT );
197 var_Get( p_access, "ftp-account", &val );
198 if( ftp_SendCommand( p_access, "ACCT %s",
199 val.psz_string ) < 0 ||
200 ftp_ReadCommand( p_access, &i_answer, NULL ) < 0 )
202 if( val.psz_string ) free( val.psz_string );
205 if( val.psz_string ) free( val.psz_string );
207 if( i_answer / 100 != 2 )
209 msg_Err( p_access, "account rejected" );
212 msg_Dbg( p_access, "account accepted" );
216 msg_Err( p_access, "password rejected" );
221 msg_Err( p_access, "user rejected" );
226 if( ftp_SendCommand( p_access, "TYPE I" ) < 0 ||
227 ftp_ReadCommand( p_access, &i_answer, NULL ) != 2 )
229 msg_Err( p_access, "cannot set binary transfert mode" );
234 if( ftp_SendCommand( p_access, "SIZE %s", p_sys->url.psz_path ) < 0 ||
235 ftp_ReadCommand( p_access, &i_answer, &psz_arg ) != 2 )
237 msg_Err( p_access, "cannot get file size" );
240 p_access->info.i_size = atoll( &psz_arg[4] );
242 msg_Dbg( p_access, "file size: "I64Fd, p_access->info.i_size );
244 /* Start the 'stream' */
245 if( ftp_StartStream( p_access, 0 ) < 0 )
247 msg_Err( p_access, "cannot retrieve file" );
251 /* Update default_pts to a suitable value for ftp access */
252 var_Create( p_access, "ftp-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
257 if( p_sys->fd_cmd > 0 )
259 net_Close( p_sys->fd_cmd );
261 vlc_UrlClean( &p_sys->url );
266 /*****************************************************************************
267 * Close: free unused data structures
268 *****************************************************************************/
269 static void Close( vlc_object_t *p_this )
271 access_t *p_access = (access_t*)p_this;
272 access_sys_t *p_sys = p_access->p_sys;
274 msg_Dbg( p_access, "stopping stream" );
275 ftp_StopStream( p_access );
277 if( ftp_SendCommand( p_access, "QUIT" ) < 0 )
279 msg_Warn( p_access, "cannot quit" );
283 ftp_ReadCommand( p_access, NULL, NULL );
285 net_Close( p_sys->fd_cmd );
288 vlc_UrlClean( &p_sys->url );
292 /*****************************************************************************
293 * Seek: try to go at the right place
294 *****************************************************************************/
295 static int Seek( access_t *p_access, int64_t i_pos )
301 msg_Dbg( p_access, "seeking to "I64Fd, i_pos );
303 ftp_StopStream( p_access );
304 if( ftp_StartStream( p_access, i_pos ) < 0 )
306 p_access->info.b_eof = VLC_TRUE;
310 p_access->info.b_eof = VLC_FALSE;
311 p_access->info.i_pos = i_pos;
316 /*****************************************************************************
318 *****************************************************************************/
319 static int Read( access_t *p_access, uint8_t *p_buffer, int i_len )
321 access_sys_t *p_sys = p_access->p_sys;
324 if( p_access->info.b_eof )
327 i_read = net_Read( p_access, p_sys->fd_data, p_buffer, i_len, VLC_FALSE );
329 p_access->info.b_eof = VLC_TRUE;
330 else if( i_read > 0 )
331 p_access->info.i_pos += i_read;
336 /*****************************************************************************
338 *****************************************************************************/
339 static int Control( access_t *p_access, int i_query, va_list args )
349 case ACCESS_CAN_SEEK:
350 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
353 case ACCESS_CAN_FASTSEEK:
354 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
355 *pb_bool = VLC_FALSE;
357 case ACCESS_CAN_PAUSE:
358 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
359 *pb_bool = VLC_TRUE; /* FIXME */
361 case ACCESS_CAN_CONTROL_PACE:
362 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
363 *pb_bool = VLC_TRUE; /* FIXME */
368 pi_int = (int*)va_arg( args, int * );
372 case ACCESS_GET_PTS_DELAY:
373 pi_64 = (int64_t*)va_arg( args, int64_t * );
374 var_Get( p_access, "ftp-caching", &val );
375 *pi_64 = val.i_int * 1000;
379 case ACCESS_SET_PAUSE_STATE:
383 case ACCESS_GET_TITLE_INFO:
384 case ACCESS_GET_SEEKPOINT_INFO:
385 case ACCESS_SET_TITLE:
386 case ACCESS_SET_SEEKPOINT:
390 msg_Err( p_access, "unimplemented query in control" );
397 /*****************************************************************************
399 *****************************************************************************/
400 static int ftp_SendCommand( access_t *p_access, char *psz_fmt, ... )
402 access_sys_t *p_sys = p_access->p_sys;
407 va_start( args, psz_fmt );
408 vasprintf( &psz_cmd, psz_fmt, args );
411 msg_Dbg( p_access, "ftp_SendCommand:\"%s\"", psz_cmd);
412 if( ( i_ret = net_Printf( VLC_OBJECT(p_access), p_sys->fd_cmd,
413 "%s", psz_cmd ) ) > 0 )
415 i_ret = net_Printf( VLC_OBJECT(p_access), p_sys->fd_cmd, "\n" );
420 msg_Err( p_access, "failed to send command" );
426 /* TODO support this s**t :
427 RFC 959 allows the client to send certain TELNET strings at any moment,
428 even in the middle of a request:
431 * \377\376x where x is one byte.
432 * \377\375x where x is one byte. The server is obliged to send \377\374x
433 * immediately after reading x.
434 * \377\374x where x is one byte.
435 * \377\373x where x is one byte. The server is obliged to send \377\376x
436 * immediately after reading x.
437 * \377x for any other byte x.
439 These strings are not part of the requests, except in the case \377\377,
440 where the request contains one \377. */
441 static int ftp_ReadCommand( access_t *p_access,
442 int *pi_answer, char **ppsz_answer )
444 access_sys_t *p_sys = p_access->p_sys;
448 psz_line = net_Gets( p_access, p_sys->fd_cmd );
449 msg_Dbg( p_access, "answer=%s", psz_line );
450 if( psz_line == NULL || strlen( psz_line ) < 3 )
452 msg_Err( p_access, "cannot get answer" );
453 if( psz_line ) free( psz_line );
454 if( pi_answer ) *pi_answer = 500;
455 if( ppsz_answer ) *ppsz_answer = NULL;
459 i_answer = atoi( psz_line );
461 if( pi_answer ) *pi_answer = i_answer;
464 *ppsz_answer = psz_line;
470 return( i_answer / 100 );
473 static int ftp_StartStream( access_t *p_access, off_t i_start )
475 access_sys_t *p_sys = p_access->p_sys;
479 char *psz_arg, *psz_parser;
484 if( ftp_SendCommand( p_access, "PASV" ) < 0 ||
485 ftp_ReadCommand( p_access, &i_answer, &psz_arg ) != 2 )
487 msg_Err( p_access, "cannot set passive transfert mode" );
491 psz_parser = strchr( psz_arg, '(' );
493 sscanf( psz_parser, "(%d,%d,%d,%d,%d,%d", &a1, &a2, &a3,
494 &a4, &p1, &p2 ) < 6 )
497 msg_Err( p_access, "cannot get ip/port for passive transfert mode" );
502 sprintf( psz_ip, "%d.%d.%d.%d", a1, a2, a3, a4 );
503 i_port = p1 * 256 + p2;
504 msg_Dbg( p_access, "ip:%s port:%d", psz_ip, i_port );
506 if( ftp_SendCommand( p_access, "TYPE I" ) < 0 ||
507 ftp_ReadCommand( p_access, &i_answer, NULL ) != 2 )
509 msg_Err( p_access, "cannot set binary transfert mode" );
515 if( ftp_SendCommand( p_access, "REST "I64Fu, i_start ) < 0 ||
516 ftp_ReadCommand( p_access, &i_answer, NULL ) > 3 )
518 msg_Err( p_access, "cannot set restart point" );
523 msg_Dbg( p_access, "waiting for data connection..." );
524 p_sys->fd_data = net_OpenTCP( p_access, psz_ip, i_port );
525 if( p_sys->fd_data < 0 )
527 msg_Err( p_access, "failed to connect with server" );
530 msg_Dbg( p_access, "connection with \"%s:%d\" successful",
534 if( ftp_SendCommand( p_access, "RETR %s", p_sys->url.psz_path ) < 0 ||
535 ftp_ReadCommand( p_access, &i_answer, NULL ) > 2 )
537 msg_Err( p_access, "cannot retreive file" );
543 static int ftp_StopStream ( access_t *p_access )
545 access_sys_t *p_sys = p_access->p_sys;
549 if( ftp_SendCommand( p_access, "ABOR" ) < 0 )
551 msg_Warn( p_access, "cannot abord file" );
552 if( p_sys->fd_data > 0 )
553 net_Close( p_sys->fd_data );
557 if( p_sys->fd_data > 0 )
559 net_Close( p_sys->fd_data );
561 ftp_ReadCommand( p_access, &i_answer, NULL );
563 ftp_ReadCommand( p_access, &i_answer, NULL );