1 /*****************************************************************************
2 * ftp.c: FTP input module
3 *****************************************************************************
4 * Copyright (C) 2001-2006 the VideoLAN team
5 * Copyright © 2006 Rémi Denis-Courmont
8 * Authors: Laurent Aimar <fenrir@via.ecp.fr> - original code
9 * Rémi Denis-Courmont <rem # videolan.org> - EPSV support
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
38 #include <vlc_access.h>
39 #include <vlc_interface.h>
41 #include <vlc_network.h>
46 # define IPPORT_FTP 21u
49 /*****************************************************************************
51 *****************************************************************************/
52 static int InOpen ( vlc_object_t * );
53 static void InClose( vlc_object_t * );
54 static int OutOpen ( vlc_object_t * );
55 static void OutClose( vlc_object_t * );
57 #define CACHING_TEXT N_("Caching value in ms")
58 #define CACHING_LONGTEXT N_( \
59 "Caching value for FTP streams. This " \
60 "value should be set in milliseconds." )
61 #define USER_TEXT N_("FTP user name")
62 #define USER_LONGTEXT N_("User name that will " \
63 "be used for the connection.")
64 #define PASS_TEXT N_("FTP password")
65 #define PASS_LONGTEXT N_("Password that will be " \
66 "used for the connection.")
67 #define ACCOUNT_TEXT N_("FTP account")
68 #define ACCOUNT_LONGTEXT N_("Account that will be " \
69 "used for the connection.")
72 set_shortname( "FTP" )
73 set_description( N_("FTP input") )
74 set_capability( "access", 0 )
75 set_category( CAT_INPUT )
76 set_subcategory( SUBCAT_INPUT_ACCESS )
77 add_integer( "ftp-caching", 2 * DEFAULT_PTS_DELAY / 1000, NULL,
78 CACHING_TEXT, CACHING_LONGTEXT, true )
79 add_string( "ftp-user", "anonymous", NULL, USER_TEXT, USER_LONGTEXT,
81 add_string( "ftp-pwd", "anonymous@example.com", NULL, PASS_TEXT,
82 PASS_LONGTEXT, false )
83 add_string( "ftp-account", "anonymous", NULL, ACCOUNT_TEXT,
84 ACCOUNT_LONGTEXT, false )
86 set_callbacks( InOpen, InClose )
89 set_shortname( "FTP" )
90 set_description( N_("FTP upload output") )
91 set_capability( "sout access", 0 )
92 set_category( CAT_SOUT )
93 set_subcategory( SUBCAT_SOUT_ACO )
94 set_callbacks( OutOpen, OutClose )
97 /*****************************************************************************
99 *****************************************************************************/
100 static ssize_t Read( access_t *, uint8_t *, size_t );
101 static ssize_t Write( sout_access_out_t *, block_t * );
102 static int Seek( access_t *, int64_t );
103 static int OutSeek( sout_access_out_t *, off_t );
104 static int Control( access_t *, int, va_list );
113 char sz_epsv_ip[NI_MAXNUMERICHOST];
117 #define GET_OUT_SYS( p_this ) \
118 ((access_sys_t *)(((sout_access_out_t *)(p_this))->p_sys))
120 static int ftp_SendCommand( vlc_object_t *, access_sys_t *, const char *, ... );
121 static int ftp_ReadCommand( vlc_object_t *, access_sys_t *, int *, char ** );
122 static int ftp_StartStream( vlc_object_t *, access_sys_t *, int64_t );
123 static int ftp_StopStream ( vlc_object_t *, access_sys_t * );
125 static int Login( vlc_object_t *p_access, access_sys_t *p_sys )
130 /* *** Open a TCP connection with server *** */
131 int fd = p_sys->fd_cmd = net_ConnectTCP( p_access, p_sys->url.psz_host,
135 msg_Err( p_access, "connection failed" );
136 intf_UserFatal( p_access, false, _("Network interaction failed"),
137 _("VLC could not connect with the given server.") );
141 while( ftp_ReadCommand( p_access, p_sys, &i_answer, NULL ) == 1 );
143 if( i_answer / 100 != 2 )
145 msg_Err( p_access, "connection rejected" );
146 intf_UserFatal( p_access, false, _("Network interaction failed"),
147 _("VLC's connection to the given server was rejected.") );
151 msg_Dbg( p_access, "connection accepted (%d)", i_answer );
153 if( p_sys->url.psz_username && *p_sys->url.psz_username )
154 psz = strdup( p_sys->url.psz_username );
156 psz = var_CreateGetString( p_access, "ftp-user" );
160 if( ftp_SendCommand( p_access, p_sys, "USER %s", psz ) < 0 ||
161 ftp_ReadCommand( p_access, p_sys, &i_answer, NULL ) < 0 )
168 switch( i_answer / 100 )
171 msg_Dbg( p_access, "user accepted" );
174 msg_Dbg( p_access, "password needed" );
175 if( p_sys->url.psz_password && *p_sys->url.psz_password )
176 psz = strdup( p_sys->url.psz_password );
178 psz = var_CreateGetString( p_access, "ftp-pwd" );
182 if( ftp_SendCommand( p_access, p_sys, "PASS %s", psz ) < 0 ||
183 ftp_ReadCommand( p_access, p_sys, &i_answer, NULL ) < 0 )
190 switch( i_answer / 100 )
193 msg_Dbg( p_access, "password accepted" );
196 msg_Dbg( p_access, "account needed" );
197 psz = var_CreateGetString( p_access, "ftp-account" );
198 if( ftp_SendCommand( p_access, p_sys, "ACCT %s",
200 ftp_ReadCommand( p_access, p_sys, &i_answer, NULL ) < 0 )
207 if( i_answer / 100 != 2 )
209 msg_Err( p_access, "account rejected" );
210 intf_UserFatal( p_access, false,
211 _("Network interaction failed"),
212 _("Your account was rejected.") );
215 msg_Dbg( p_access, "account accepted" );
219 msg_Err( p_access, "password rejected" );
220 intf_UserFatal( p_access, false,
221 _("Network interaction failed"),
222 _("Your password was rejected.") );
227 msg_Err( p_access, "user rejected" );
228 intf_UserFatal( p_access, false,
229 _("Network interaction failed"),
230 _("Your connection attempt to the server was rejected.") );
237 static int Connect( vlc_object_t *p_access, access_sys_t *p_sys )
239 if( Login( p_access, p_sys ) < 0 )
242 /* Extended passive mode */
243 if( ftp_SendCommand( p_access, p_sys, "EPSV ALL" ) < 0 )
245 msg_Err( p_access, "cannot request extended passive mode" );
246 net_Close( p_sys->fd_cmd );
250 if( ftp_ReadCommand( p_access, p_sys, NULL, NULL ) == 2 )
252 if( net_GetPeerAddress( p_sys->fd_cmd, p_sys->sz_epsv_ip, NULL ) )
254 net_Close( p_sys->fd_cmd );
260 /* If ESPV ALL fails, we fallback to PASV.
261 * We have to restart the connection in case there is a NAT that
262 * understands EPSV ALL in the way, and hence won't allow PASV on
263 * the initial connection.
265 msg_Info( p_access, "FTP Extended passive mode disabled" );
266 net_Close( p_sys->fd_cmd );
268 if( Login( p_access, p_sys ) )
270 net_Close( p_sys->fd_cmd );
275 /* check binary mode support */
276 if( ftp_SendCommand( p_access, p_sys, "TYPE I" ) < 0 ||
277 ftp_ReadCommand( p_access, p_sys, NULL, NULL ) != 2 )
279 msg_Err( p_access, "cannot set binary transfer mode" );
280 net_Close( p_sys->fd_cmd );
288 static int parseURL( vlc_url_t *url, const char *path )
293 /* *** Parse URL and get server addr/port and path *** */
294 while( *path == '/' )
297 vlc_UrlParse( url, path, 0 );
299 if( url->psz_host == NULL || *url->psz_host == '\0' )
302 if( url->i_port <= 0 )
303 url->i_port = IPPORT_FTP; /* default port */
305 /* FTP URLs are relative to user's default directory (RFC1738)
306 For absolute path use ftp://foo.bar//usr/local/etc/filename */
308 if( url->psz_path && *url->psz_path == '/' )
315 /****************************************************************************
316 * Open: connect to ftp server and ask for file
317 ****************************************************************************/
318 static int InOpen( vlc_object_t *p_this )
320 access_t *p_access = (access_t*)p_this;
325 STANDARD_READ_ACCESS_INIT
328 p_sys->directory = false;
330 if( parseURL( &p_sys->url, p_access->psz_path ) )
333 if( Connect( p_this, p_sys ) )
337 if( ftp_SendCommand( p_this, p_sys, "SIZE %s", p_sys->url.psz_path ? : "" ) < 0 ||
338 ftp_ReadCommand( p_this, p_sys, NULL, &psz_arg ) != 2 )
340 msg_Dbg( p_access, "cannot get file size" );
341 msg_Dbg( p_access, "will try to get directory contents" );
342 if( ftp_SendCommand( p_this, p_sys, "CWD %s", p_sys->url.psz_path ?: "" ) < 0 ||
343 ftp_ReadCommand( p_this, p_sys, NULL, &psz_arg ) != 2 )
345 msg_Err( p_access, "file or directory doesn't exist" );
346 net_Close( p_sys->fd_cmd );
349 p_sys->directory = true;
353 p_access->info.i_size = atoll( &psz_arg[4] );
355 msg_Dbg( p_access, "file size: %"PRId64, p_access->info.i_size );
358 /* Start the 'stream' */
359 if( ftp_StartStream( p_this, p_sys, 0 ) < 0 )
361 msg_Err( p_access, "cannot retrieve file" );
362 net_Close( p_sys->fd_cmd );
366 /* Update default_pts to a suitable value for ftp access */
367 var_Create( p_access, "ftp-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
372 vlc_UrlClean( &p_sys->url );
377 static int OutOpen( vlc_object_t *p_this )
379 sout_access_out_t *p_access = (sout_access_out_t *)p_this;
382 p_sys = calloc( 1, sizeof( *p_sys ) );
390 if( parseURL( &p_sys->url, p_access->psz_path ) )
393 if( Connect( p_this, p_sys ) )
396 /* Start the 'stream' */
397 if( ftp_StartStream( p_this, p_sys, 0 ) < 0 )
399 msg_Err( p_access, "cannot store file" );
400 net_Close( p_sys->fd_cmd );
404 p_access->pf_seek = OutSeek;
405 p_access->pf_write = Write;
406 p_access->p_sys = (void *)p_sys;
411 vlc_UrlClean( &p_sys->url );
416 /*****************************************************************************
417 * Close: free unused data structures
418 *****************************************************************************/
419 static void Close( vlc_object_t *p_access, access_sys_t *p_sys )
421 msg_Dbg( p_access, "stopping stream" );
422 ftp_StopStream( p_access, p_sys );
424 if( ftp_SendCommand( p_access, p_sys, "QUIT" ) < 0 )
426 msg_Warn( p_access, "cannot quit" );
430 ftp_ReadCommand( p_access, p_sys, NULL, NULL );
432 net_Close( p_sys->fd_cmd );
435 vlc_UrlClean( &p_sys->url );
439 static void InClose( vlc_object_t *p_this )
441 Close( p_this, ((access_t *)p_this)->p_sys);
444 static void OutClose( vlc_object_t *p_this )
446 Close( p_this, GET_OUT_SYS(p_this));
450 /*****************************************************************************
451 * Seek: try to go at the right place
452 *****************************************************************************/
453 static int _Seek( vlc_object_t *p_access, access_sys_t *p_sys, int64_t i_pos )
458 msg_Dbg( p_access, "seeking to %"PRId64, i_pos );
460 ftp_StopStream( (vlc_object_t *)p_access, p_sys );
461 if( ftp_StartStream( (vlc_object_t *)p_access, p_sys, i_pos ) < 0 )
467 static int Seek( access_t *p_access, int64_t i_pos )
469 int val = _Seek( (vlc_object_t *)p_access, p_access->p_sys, i_pos );
473 p_access->info.b_eof = false;
474 p_access->info.i_pos = i_pos;
479 static int OutSeek( sout_access_out_t *p_access, off_t i_pos )
481 return _Seek( (vlc_object_t *)p_access, GET_OUT_SYS( p_access ), i_pos);
484 /*****************************************************************************
486 *****************************************************************************/
487 static ssize_t Read( access_t *p_access, uint8_t *p_buffer, size_t i_len )
489 access_sys_t *p_sys = p_access->p_sys;
491 assert( p_sys->fd_data != -1 );
492 assert( !p_sys->out );
494 if( p_access->info.b_eof )
497 if( p_sys->directory )
499 char *psz_line = net_Gets( p_access, p_sys->fd_data, NULL );
502 p_access->info.b_eof = true;
507 snprintf( (char*)p_buffer, i_len, "ftp://%s:%d/%s/%s\n",
508 p_sys->url.psz_host, p_sys->url.i_port,
509 p_sys->url.psz_path, psz_line );
511 return strlen( (const char *)p_buffer );
516 int i_read = net_Read( p_access, p_sys->fd_data, NULL,
517 p_buffer, i_len, false );
519 p_access->info.b_eof = true;
520 else if( i_read > 0 )
521 p_access->info.i_pos += i_read;
527 /*****************************************************************************
529 *****************************************************************************/
530 static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
532 access_sys_t *p_sys = GET_OUT_SYS(p_access);
535 assert( p_sys->fd_data != -1 );
537 while( p_buffer != NULL )
539 block_t *p_next = p_buffer->p_next;;
541 i_write += net_Write( p_access, p_sys->fd_data, NULL,
542 p_buffer->p_buffer, p_buffer->i_buffer );
543 block_Release( p_buffer );
551 /*****************************************************************************
553 *****************************************************************************/
554 static int Control( access_t *p_access, int i_query, va_list args )
562 case ACCESS_CAN_SEEK:
563 pb_bool = (bool*)va_arg( args, bool* );
566 case ACCESS_CAN_FASTSEEK:
567 pb_bool = (bool*)va_arg( args, bool* );
570 case ACCESS_CAN_PAUSE:
571 pb_bool = (bool*)va_arg( args, bool* );
572 *pb_bool = true; /* FIXME */
574 case ACCESS_CAN_CONTROL_PACE:
575 pb_bool = (bool*)va_arg( args, bool* );
576 *pb_bool = true; /* FIXME */
580 case ACCESS_GET_PTS_DELAY:
581 pi_64 = (int64_t*)va_arg( args, int64_t * );
582 *pi_64 = (int64_t)var_GetInteger( p_access, "ftp-caching" ) * INT64_C(1000);
586 case ACCESS_SET_PAUSE_STATE:
587 pb_bool = (bool*)va_arg( args, bool* );
589 return Seek( p_access, p_access->info.i_pos );
592 case ACCESS_GET_TITLE_INFO:
593 case ACCESS_SET_TITLE:
594 case ACCESS_SET_SEEKPOINT:
595 case ACCESS_SET_PRIVATE_ID_STATE:
596 case ACCESS_GET_CONTENT_TYPE:
597 case ACCESS_GET_META:
601 msg_Warn( p_access, "unimplemented query in control: %d", i_query);
608 /*****************************************************************************
610 *****************************************************************************/
611 static int ftp_SendCommand( vlc_object_t *p_access, access_sys_t *p_sys,
612 const char *psz_fmt, ... )
617 va_start( args, psz_fmt );
618 if( vasprintf( &psz_cmd, psz_fmt, args ) == -1 )
623 msg_Dbg( p_access, "ftp_SendCommand:\"%s\"", psz_cmd);
625 if( net_Printf( VLC_OBJECT(p_access), p_sys->fd_cmd, NULL, "%s\r\n",
628 msg_Err( p_access, "failed to send command" );
634 /* TODO support this s**t :
635 RFC 959 allows the client to send certain TELNET strings at any moment,
636 even in the middle of a request:
639 * \377\376x where x is one byte.
640 * \377\375x where x is one byte. The server is obliged to send \377\374x
641 * immediately after reading x.
642 * \377\374x where x is one byte.
643 * \377\373x where x is one byte. The server is obliged to send \377\376x
644 * immediately after reading x.
645 * \377x for any other byte x.
647 These strings are not part of the requests, except in the case \377\377,
648 where the request contains one \377. */
649 static int ftp_ReadCommand( vlc_object_t *p_access, access_sys_t *p_sys,
650 int *pi_answer, char **ppsz_answer )
655 psz_line = net_Gets( p_access, p_sys->fd_cmd, NULL );
656 if( psz_line == NULL || strlen( psz_line ) < 3 )
658 msg_Err( p_access, "cannot get answer" );
660 if( pi_answer ) *pi_answer = 500;
661 if( ppsz_answer ) *ppsz_answer = NULL;
664 msg_Dbg( p_access, "answer=%s", psz_line );
666 if( psz_line[3] == '-' ) /* Multiple response */
670 memcpy( end, psz_line, 3 );
675 char *psz_tmp = net_Gets( p_access, p_sys->fd_cmd, NULL );
677 if( psz_tmp == NULL ) /* Error */
680 if( !strncmp( psz_tmp, end, 4 ) )
689 i_answer = atoi( psz_line );
691 if( pi_answer ) *pi_answer = i_answer;
694 *ppsz_answer = psz_line;
700 return( i_answer / 100 );
703 static int ftp_StartStream( vlc_object_t *p_access, access_sys_t *p_sys,
706 char psz_ipv4[16], *psz_ip = p_sys->sz_epsv_ip;
708 char *psz_arg, *psz_parser;
711 assert( p_sys->fd_data == -1 );
713 if( ( ftp_SendCommand( p_access, p_sys, *psz_ip ? "EPSV" : "PASV" ) < 0 )
714 || ( ftp_ReadCommand( p_access, p_sys, &i_answer, &psz_arg ) != 2 ) )
716 msg_Err( p_access, "cannot set passive mode" );
720 psz_parser = strchr( psz_arg, '(' );
721 if( psz_parser == NULL )
724 msg_Err( p_access, "cannot parse passive mode response" );
730 char psz_fmt[7] = "(|||%u";
731 psz_fmt[1] = psz_fmt[2] = psz_fmt[3] = psz_parser[1];
733 if( sscanf( psz_parser, psz_fmt, &i_port ) < 1 )
736 msg_Err( p_access, "cannot parse passive mode response" );
742 unsigned a1, a2, a3, a4, p1, p2;
744 if( ( sscanf( psz_parser, "(%u,%u,%u,%u,%u,%u", &a1, &a2, &a3, &a4,
745 &p1, &p2 ) < 6 ) || ( a1 > 255 ) || ( a2 > 255 )
746 || ( a3 > 255 ) || ( a4 > 255 ) || ( p1 > 255 ) || ( p2 > 255 ) )
749 msg_Err( p_access, "cannot parse passive mode response" );
753 sprintf( psz_ipv4, "%u.%u.%u.%u", a1, a2, a3, a4 );
755 i_port = (p1 << 8) | p2;
759 msg_Dbg( p_access, "ip:%s port:%d", psz_ip, i_port );
761 if( ftp_SendCommand( p_access, p_sys, "TYPE I" ) < 0 ||
762 ftp_ReadCommand( p_access, p_sys, &i_answer, NULL ) != 2 )
764 msg_Err( p_access, "cannot set binary transfer mode" );
770 if( ftp_SendCommand( p_access, p_sys, "REST %"PRIu64, i_start ) < 0 ||
771 ftp_ReadCommand( p_access, p_sys, &i_answer, NULL ) > 3 )
773 msg_Err( p_access, "cannot set restart offset" );
778 msg_Dbg( p_access, "waiting for data connection..." );
779 p_sys->fd_data = net_ConnectTCP( p_access, psz_ip, i_port );
780 if( p_sys->fd_data < 0 )
782 msg_Err( p_access, "failed to connect with server" );
785 msg_Dbg( p_access, "connection with \"%s:%d\" successful",
788 if( p_sys->directory )
790 if( ftp_SendCommand( p_access, p_sys, "NLST" ) < 0 ||
791 ftp_ReadCommand( p_access, p_sys, NULL, &psz_arg ) > 2 )
793 msg_Err( p_access, "cannot list directory contents" );
800 if( ftp_SendCommand( p_access, p_sys, "%s %s",
801 p_sys->out ? "STOR" : "RETR",
802 p_sys->url.psz_path ?: "" ) < 0 ||
803 ftp_ReadCommand( p_access, p_sys, &i_answer, NULL ) > 2 )
805 msg_Err( p_access, "cannot retrieve file" );
810 shutdown( p_sys->fd_data, p_sys->out ? SHUT_RD : SHUT_WR );
815 static int ftp_StopStream ( vlc_object_t *p_access, access_sys_t *p_sys )
817 if( ftp_SendCommand( p_access, p_sys, "ABOR" ) < 0 )
819 msg_Warn( p_access, "cannot abort file" );
820 if( p_sys->fd_data > 0 )
821 net_Close( p_sys->fd_data );
826 if( p_sys->fd_data != -1 )
828 net_Close( p_sys->fd_data );
830 /* Read the final response from RETR/STOR, i.e. 426 or 226 */
831 ftp_ReadCommand( p_access, p_sys, NULL, NULL );
833 /* Read the response from ABOR, i.e. 226 or 225 */
834 ftp_ReadCommand( p_access, p_sys, NULL, NULL );