/*****************************************************************************
* ftp.c: FTP input module
*****************************************************************************
- * Copyright (C) 2001-2004 VideoLAN
+ * Copyright (C) 2001-2006 the VideoLAN team
* $Id$
*
- * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr> - original code
+ * Rémi Denis-Courmont <rem # videolan.org> - EPSV support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
#include <vlc/input.h>
#include "network.h"
+#include "vlc_url.h"
/*****************************************************************************
* Module descriptor
#define CACHING_TEXT N_("Caching value in ms")
#define CACHING_LONGTEXT N_( \
- "Allows you to modify the default caching value for FTP streams. This " \
- "value should be set in millisecond units." )
+ "Caching value for FTP streams. This " \
+ "value should be set in milliseconds." )
#define USER_TEXT N_("FTP user name")
-#define USER_LONGTEXT N_("Allows you to modify the user name that will " \
+#define USER_LONGTEXT N_("User name that will " \
"be used for the connection.")
#define PASS_TEXT N_("FTP password")
-#define PASS_LONGTEXT N_("Allows you to modify the password that will be " \
+#define PASS_LONGTEXT N_("Password that will be " \
"used for the connection.")
#define ACCOUNT_TEXT N_("FTP account")
-#define ACCOUNT_LONGTEXT N_("Allows you to modify the account that will be " \
+#define ACCOUNT_LONGTEXT N_("Account that will be " \
"used for the connection.")
vlc_module_begin();
+ set_shortname( "FTP" );
set_description( _("FTP input") );
set_capability( "access2", 0 );
+ set_category( CAT_INPUT );
+ set_subcategory( SUBCAT_INPUT_ACCESS );
add_integer( "ftp-caching", 2 * DEFAULT_PTS_DELAY / 1000, NULL,
CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
add_string( "ftp-user", "anonymous", NULL, USER_TEXT, USER_LONGTEXT,
struct access_sys_t
{
- vlc_url_t url;
+ vlc_url_t url;
- int fd_cmd;
- int fd_data;
+ int fd_cmd;
+ int fd_data;
+
+ char sz_epsv_ip[NI_MAXNUMERICHOST];
};
static int ftp_SendCommand( access_t *, char *, ... );
static int ftp_StartStream( access_t *, int64_t );
static int ftp_StopStream ( access_t *);
-/****************************************************************************
- * Open: connect to ftp server and ask for file
- ****************************************************************************/
-static int Open( vlc_object_t *p_this )
+static int Connect( access_t *p_access, access_sys_t *p_sys )
{
- access_t *p_access = (access_t*)p_this;
- access_sys_t *p_sys;
- char *psz;
-
- int i_answer;
- char *psz_arg;
-
- /* Init p_access */
- p_access->pf_read = Read;
- p_access->pf_block = NULL;
- p_access->pf_seek = Seek;
- p_access->pf_control = Control;
- p_access->info.i_update = 0;
- p_access->info.i_size = 0;
- p_access->info.i_pos = 0;
- p_access->info.b_eof = VLC_FALSE;
- p_access->info.i_title = 0;
- p_access->info.i_seekpoint = 0;
- p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
- memset( p_sys, 0, sizeof( access_sys_t ) );
- p_sys->fd_cmd = -1;
- p_sys->fd_data = -1;
-
- /* *** Parse URL and get server addr/port and path *** */
- psz = p_access->psz_path;
- while( *psz == '/' )
- {
- psz++;
- }
- vlc_UrlParse( &p_sys->url, psz, 0 );
-
- if( p_sys->url.psz_host == NULL || *p_sys->url.psz_host == '\0' )
- {
- msg_Err( p_access, "invalid server name" );
- goto exit_error;
- }
- if( p_sys->url.i_port <= 0 )
- {
- p_sys->url.i_port = 21; /* default port */
- }
+ int fd, i_answer;
+ char *psz;
/* *** Open a TCP connection with server *** */
msg_Dbg( p_access, "waiting for connection..." );
- p_sys->fd_cmd = net_OpenTCP( p_access, p_sys->url.psz_host,
- p_sys->url.i_port );
- if( p_sys->fd_cmd < 0 )
+ p_sys->fd_cmd = fd = net_ConnectTCP( p_access, p_sys->url.psz_host,
+ p_sys->url.i_port );
+ if( fd < 0 )
{
msg_Err( p_access, "failed to connect with server" );
- goto exit_error;
+ return -1;
}
for( ;; )
if( i_answer / 100 != 2 )
{
msg_Err( p_access, "connection rejected" );
- goto exit_error;
+ return -1;
}
msg_Dbg( p_access, "connection accepted (%d)", i_answer );
+
+ if( p_sys->url.psz_username && *p_sys->url.psz_username )
+ psz = strdup( p_sys->url.psz_username );
+ else
+ psz = var_CreateGetString( p_access, "ftp-user" );
- psz = var_CreateGetString( p_access, "ftp-user" );
if( ftp_SendCommand( p_access, "USER %s", psz ) < 0 ||
ftp_ReadCommand( p_access, &i_answer, NULL ) < 0 )
{
free( psz );
- goto exit_error;
+ return -1;
}
free( psz );
break;
case 3:
msg_Dbg( p_access, "password needed" );
- psz = var_CreateGetString( p_access, "ftp-pwd" );
+ if( p_sys->url.psz_password && *p_sys->url.psz_password )
+ psz = strdup( p_sys->url.psz_password );
+ else
+ psz = var_CreateGetString( p_access, "ftp-pwd" );
+
if( ftp_SendCommand( p_access, "PASS %s", psz ) < 0 ||
ftp_ReadCommand( p_access, &i_answer, NULL ) < 0 )
{
free( psz );
- goto exit_error;
+ return -1;
}
free( psz );
ftp_ReadCommand( p_access, &i_answer, NULL ) < 0 )
{
free( psz );
- goto exit_error;
+ return -1;
}
free( psz );
if( i_answer / 100 != 2 )
{
msg_Err( p_access, "account rejected" );
- goto exit_error;
+ return -1;
}
msg_Dbg( p_access, "account accepted" );
break;
default:
msg_Err( p_access, "password rejected" );
- goto exit_error;
+ return -1;
}
break;
default:
msg_Err( p_access, "user rejected" );
+ return -1;
+ }
+
+ return 0;
+}
+
+/****************************************************************************
+ * Open: connect to ftp server and ask for file
+ ****************************************************************************/
+static int Open( vlc_object_t *p_this )
+{
+ access_t *p_access = (access_t*)p_this;
+ access_sys_t *p_sys;
+ char *psz;
+
+ int i_answer;
+ char *psz_arg;
+
+ /* Init p_access */
+ STANDARD_READ_ACCESS_INIT
+ p_sys->fd_cmd = -1;
+ p_sys->fd_data = -1;
+
+ /* *** Parse URL and get server addr/port and path *** */
+ psz = p_access->psz_path;
+ while( *psz == '/' )
+ {
+ psz++;
+ }
+ vlc_UrlParse( &p_sys->url, psz, 0 );
+
+ if( p_sys->url.psz_host == NULL || *p_sys->url.psz_host == '\0' )
+ {
+ msg_Err( p_access, "invalid server name" );
+ goto exit_error;
+ }
+ if( p_sys->url.i_port <= 0 )
+ {
+ p_sys->url.i_port = 21; /* default port */
+ }
+
+ /* FTP URLs are relative to user's default directory (RFC1738)
+ For absolute path use ftp://foo.bar//usr/local/etc/filename */
+
+ if( *p_sys->url.psz_path == '/' )
+ p_sys->url.psz_path++;
+
+ if( Connect( p_access, p_sys ) < 0 )
+ goto exit_error;
+
+ /* Extended passive mode */
+ if( ftp_SendCommand( p_access, "EPSV ALL" ) < 0 )
+ {
+ msg_Err( p_access, "cannot request extended passive mode" );
+ return -1;
+ }
+
+ if( ftp_ReadCommand( p_access, &i_answer, NULL ) == 2 )
+ {
+ if( net_GetPeerAddress( p_sys->fd_cmd, p_sys->sz_epsv_ip, NULL ) )
goto exit_error;
}
+ else
+ {
+ /* If ESPV ALL fails, we fallback to PASV.
+ * We have to restart the connection in case there is a NAT that
+ * understands EPSV ALL in the way, and hence won't allow PASV on
+ * the initial connection.
+ */
+ net_Close( p_sys->fd_cmd );
+ p_sys->fd_cmd = -1;
+ *p_sys->sz_epsv_ip = '\0';
+
+ msg_Info( p_access, "FTP Extended passive mode disabled" );
+
+ if( ( p_sys->fd_cmd = Connect( p_access, p_sys ) ) < 0 )
+ goto exit_error;
+ }
/* binary mode */
if( ftp_SendCommand( p_access, "TYPE I" ) < 0 ||
return VLC_SUCCESS;
exit_error:
- if( p_sys->fd_cmd > 0 )
- {
+ if( p_sys->fd_cmd >= 0 )
net_Close( p_sys->fd_cmd );
- }
vlc_UrlClean( &p_sys->url );
free( p_sys );
return VLC_EGENERIC;
access_sys_t *p_sys = p_access->p_sys;
va_list args;
char *psz_cmd;
- int i_ret;
va_start( args, psz_fmt );
vasprintf( &psz_cmd, psz_fmt, args );
va_end( args );
msg_Dbg( p_access, "ftp_SendCommand:\"%s\"", psz_cmd);
- if( ( i_ret = net_Printf( VLC_OBJECT(p_access), p_sys->fd_cmd, NULL,
- "%s", psz_cmd ) ) > 0 )
- {
- i_ret = net_Printf( VLC_OBJECT(p_access), p_sys->fd_cmd, NULL,
- "\r\n" );
- }
-
- if( i_ret < 0 )
+ if( net_Printf( VLC_OBJECT(p_access), p_sys->fd_cmd, NULL, "%s\r\n",
+ psz_cmd ) < 0 )
{
msg_Err( p_access, "failed to send command" );
return VLC_EGENERIC;
{
access_sys_t *p_sys = p_access->p_sys;
- char psz_ip[1000];
+ char psz_ipv4[16], *psz_ip;
int i_answer;
char *psz_arg, *psz_parser;
- int a1,a2,a3,a4;
- int p1,p2;
int i_port;
- if( ftp_SendCommand( p_access, "PASV" ) < 0 ||
- ftp_ReadCommand( p_access, &i_answer, &psz_arg ) != 2 )
+ psz_ip = p_sys->sz_epsv_ip;
+
+ if( ( ftp_SendCommand( p_access, *psz_ip ? "EPSV" : "PASV" ) < 0 )
+ || ( ftp_ReadCommand( p_access, &i_answer, &psz_arg ) != 2 ) )
{
- msg_Err( p_access, "cannot set passive transfer mode" );
+ msg_Err( p_access, "cannot set passive mode" );
return VLC_EGENERIC;
}
psz_parser = strchr( psz_arg, '(' );
- if( !psz_parser ||
- sscanf( psz_parser, "(%d,%d,%d,%d,%d,%d", &a1, &a2, &a3,
- &a4, &p1, &p2 ) < 6 )
+ if( psz_parser == NULL )
{
free( psz_arg );
- msg_Err( p_access, "cannot get ip/port for passive transfer mode" );
+ msg_Err( p_access, "cannot parse passive mode response" );
return VLC_EGENERIC;
}
+
+ if( psz_ip != NULL )
+ {
+ char psz_fmt[7] = "(|||%u";
+ psz_fmt[1] = psz_fmt[2] = psz_fmt[3] = psz_parser[1];
+
+ if( sscanf( psz_parser, psz_fmt, &i_port ) < 1 )
+ {
+ free( psz_arg );
+ msg_Err( p_access, "cannot parse passive mode response" );
+ return VLC_EGENERIC;
+ }
+ }
+ else
+ {
+ unsigned a1, a2, a3, a4, p1, p2;
+
+ if( ( sscanf( psz_parser, "(%u,%u,%u,%u,%u,%u", &a1, &a2, &a3, &a4,
+ &p1, &p2 ) < 6 ) || ( a1 > 255 ) || ( a2 > 255 )
+ || ( a3 > 255 ) || ( a4 > 255 ) || ( p1 > 255 ) || ( p2 > 255 ) )
+ {
+ free( psz_arg );
+ msg_Err( p_access, "cannot parse passive mode response" );
+ return VLC_EGENERIC;
+ }
+
+ sprintf( psz_ipv4, "%u.%u.%u.%u", a1, a2, a3, a4 );
+ psz_ip = psz_ipv4;
+ i_port = (p1 << 8) | p2;
+ }
free( psz_arg );
- sprintf( psz_ip, "%d.%d.%d.%d", a1, a2, a3, a4 );
- i_port = p1 * 256 + p2;
msg_Dbg( p_access, "ip:%s port:%d", psz_ip, i_port );
if( ftp_SendCommand( p_access, "TYPE I" ) < 0 ||
}
msg_Dbg( p_access, "waiting for data connection..." );
- p_sys->fd_data = net_OpenTCP( p_access, psz_ip, i_port );
+ p_sys->fd_data = net_ConnectTCP( p_access, psz_ip, i_port );
if( p_sys->fd_data < 0 )
{
msg_Err( p_access, "failed to connect with server" );
if( ftp_SendCommand( p_access, "ABOR" ) < 0 )
{
- msg_Warn( p_access, "cannot abord file" );
+ msg_Warn( p_access, "cannot abort file" );
if( p_sys->fd_data > 0 )
net_Close( p_sys->fd_data );
p_sys->fd_data = -1;
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