mirror of https://code.videolan.org/videolan/vlc
1216 lines
35 KiB
C
1216 lines
35 KiB
C
/*****************************************************************************
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* ftp.c: FTP input module
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*****************************************************************************
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* Copyright (C) 2001-2006 VLC authors and VideoLAN
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* Copyright © 2006 Rémi Denis-Courmont
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*
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* Authors: Laurent Aimar <fenrir@via.ecp.fr> - original code
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* Rémi Denis-Courmont - EPSV support
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <assert.h>
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#include <stdint.h>
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#include <errno.h>
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#include <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_access.h>
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#include <vlc_dialog.h>
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#include <vlc_input_item.h>
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#include <vlc_network.h>
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#include <vlc_url.h>
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#include <vlc_tls.h>
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#include <vlc_sout.h>
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#include <vlc_charset.h>
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#include <vlc_interrupt.h>
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#include <vlc_keystore.h>
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#ifndef IPPORT_FTP
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# define IPPORT_FTP 21u
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#endif
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#ifndef IPPORT_FTPS
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# define IPPORT_FTPS 990u
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#endif
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static int InOpen ( vlc_object_t * );
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static void InClose( vlc_object_t * );
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#ifdef ENABLE_SOUT
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static int OutOpen ( vlc_object_t * );
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static void OutClose( vlc_object_t * );
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#endif
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#define USER_TEXT N_("Username")
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#define USER_LONGTEXT N_("Username that will be used for the connection, " \
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"if no username is set in the URL.")
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#define PASS_TEXT N_("Password")
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#define PASS_LONGTEXT N_("Password that will be used for the connection, " \
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"if no username or password are set in URL.")
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#define ACCOUNT_TEXT N_("FTP account")
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#define ACCOUNT_LONGTEXT N_("Account that will be " \
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"used for the connection.")
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#define LOGIN_DIALOG_TITLE _("FTP authentication")
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#define LOGIN_DIALOG_TEXT _("Please enter a valid login and password for " \
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"the ftp connexion to %s")
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vlc_module_begin ()
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set_shortname( "FTP" )
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set_description( N_("FTP input") )
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set_capability( "access", 0 )
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set_category( CAT_INPUT )
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set_subcategory( SUBCAT_INPUT_ACCESS )
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add_string( "ftp-user", NULL, USER_TEXT, USER_LONGTEXT, false )
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add_string( "ftp-pwd", NULL, PASS_TEXT, PASS_LONGTEXT, false )
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add_string( "ftp-account", "anonymous", ACCOUNT_TEXT,
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ACCOUNT_LONGTEXT, false )
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add_shortcut( "ftp", "ftps", "ftpes" )
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set_callbacks( InOpen, InClose )
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#ifdef ENABLE_SOUT
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add_submodule ()
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set_shortname( "FTP" )
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set_description( N_("FTP upload output") )
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set_capability( "sout access", 0 )
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set_category( CAT_SOUT )
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set_subcategory( SUBCAT_SOUT_ACO )
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add_shortcut( "ftp", "ftps", "ftpes" )
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set_callbacks( OutOpen, OutClose )
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#endif
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vlc_module_end ()
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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typedef struct access_sys_t access_sys_t;
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static ssize_t Read( stream_t *, void *, size_t );
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static int Seek( stream_t *, uint64_t );
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static int Control( stream_t *, int, va_list );
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static int DirRead( stream_t *, input_item_node_t * );
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#ifdef ENABLE_SOUT
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static int OutSeek( sout_access_out_t *, off_t );
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static ssize_t Write( sout_access_out_t *, block_t * );
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#endif
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static int LoginUserPwd( vlc_object_t *, access_sys_t *,
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const char *, const char *, bool * );
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static void FeaturesCheck( void *, const char * );
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typedef struct ftp_features_t
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{
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bool b_unicode;
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bool b_authtls;
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bool b_mlst;
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} ftp_features_t;
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enum tls_mode_e
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{
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NONE = 0,
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IMPLICIT,/* ftps */
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EXPLICIT /* ftpes */
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};
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struct access_sys_t
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{
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vlc_url_t url;
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ftp_features_t features;
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vlc_tls_client_t *p_creds;
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enum tls_mode_e tlsmode;
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vlc_tls_t *cmd;
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vlc_tls_t *data;
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char sz_epsv_ip[NI_MAXNUMERICHOST];
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bool out;
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uint64_t offset;
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uint64_t size;
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};
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#define GET_OUT_SYS( p_this ) \
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((access_sys_t *)(((sout_access_out_t *)(p_this))->p_sys))
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VLC_FORMAT(3, 4)
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static int ftp_SendCommand( vlc_object_t *obj, access_sys_t *sys,
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const char *fmt, ... )
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{
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size_t fmtlen = strlen( fmt );
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char fmtbuf[fmtlen + 3];
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memcpy( fmtbuf, fmt, fmtlen );
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memcpy( fmtbuf + fmtlen, "\r\n", 3 );
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va_list args;
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char *cmd;
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int val;
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va_start( args, fmt );
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val = vasprintf( &cmd, fmtbuf, args );
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va_end( args );
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if( unlikely(val == -1) )
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return -1;
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if( strncmp( cmd, "PASS ", 5 ) && strncmp( cmd, "ACCT ", 5 ) )
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msg_Dbg( obj, "sending request: \"%.*s\" (%d bytes)", val-2, cmd, val );
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else
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msg_Dbg( obj, "sending request: \"%.*s XXXX\" (XX bytes)", 4, cmd );
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if( vlc_tls_Write( sys->cmd, cmd, val ) != val )
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{
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msg_Err( obj, "request failure" );
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val = -1;
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}
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else
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val = 0;
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free( cmd );
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return val;
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}
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static char *ftp_GetLine( vlc_object_t *obj, access_sys_t *sys )
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{
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char *resp = vlc_tls_GetLine( sys->cmd );
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if( resp == NULL )
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msg_Err( obj, "response failure" );
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return resp;
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}
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/* TODO support this s**t :
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RFC 959 allows the client to send certain TELNET strings at any moment,
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even in the middle of a request:
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* \377\377.
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* \377\376x where x is one byte.
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* \377\375x where x is one byte. The server is obliged to send \377\374x
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* immediately after reading x.
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* \377\374x where x is one byte.
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* \377\373x where x is one byte. The server is obliged to send \377\376x
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* immediately after reading x.
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* \377x for any other byte x.
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These strings are not part of the requests, except in the case \377\377,
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where the request contains one \377. */
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static int ftp_RecvReply( vlc_object_t *obj, access_sys_t *sys,
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char **restrict strp,
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void (*cb)(void *, const char *), void *opaque )
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{
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char *resp = ftp_GetLine( obj, sys );
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if( resp == NULL )
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return -1;
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char *end;
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unsigned code = strtoul( resp, &end, 10 );
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if( (end - resp) != 3 || (*end != '-' && *end != ' ') )
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{
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msg_Err( obj, "malformatted response" );
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goto error;
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}
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msg_Dbg( obj, "received response: \"%s\"", resp );
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if( *end == '-' ) /* Multi-line response */
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{
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bool done;
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*end = ' ';
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do
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{
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char *line = ftp_GetLine( obj, sys );
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if( line == NULL )
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goto error;
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done = !strncmp( resp, line, 4 );
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if( !done )
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cb( opaque, line );
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free( line );
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}
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while( !done );
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}
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if( strp != NULL )
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*strp = resp;
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else
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free( resp );
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return code;
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error:
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free( resp );
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return -1;
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}
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static int ftp_RecvAnswer( vlc_object_t *obj, access_sys_t *sys,
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int *restrict codep, char **restrict strp,
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void (*cb)(void *, const char *), void *opaque )
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{
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char *str;
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int val = ftp_RecvReply( obj, sys, &str, cb, opaque );
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if( (val / 100) == 1 )
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{ /* There can be zero or one preliminary reply per command */
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free( str );
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val = ftp_RecvReply( obj, sys, &str, cb, opaque );
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}
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if( val >= 0 )
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{
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if( codep != NULL )
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*codep = val;
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if( strp != NULL )
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*strp = str;
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else
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free( str );
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val /= 100;
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}
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else
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{
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if( codep != NULL )
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*codep = 500;
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if( strp != NULL )
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*strp = NULL;
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}
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return val;
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}
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static void DummyLine( void *data, const char *str )
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{
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(void) data; (void) str;
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}
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static int ftp_RecvCommand( vlc_object_t *obj, access_sys_t *sys,
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int *restrict codep, char **restrict strp )
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{
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return ftp_RecvAnswer( obj, sys, codep, strp, DummyLine, NULL );
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}
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static int ftp_RecvCommandInit( vlc_object_t *obj, access_sys_t *sys )
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{
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int val = ftp_RecvReply( obj, sys, NULL, DummyLine, NULL );
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if( val >= 0 )
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val /= 100;
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return val;
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}
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static int ftp_StartStream( vlc_object_t *, access_sys_t *, uint64_t, bool );
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static int ftp_StopStream ( vlc_object_t *, access_sys_t * );
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static int readTLSMode( vlc_object_t *obj, access_sys_t *p_sys,
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const char * psz_access )
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{
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if ( !strncmp( psz_access, "ftps", 4 ) )
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p_sys->tlsmode = IMPLICIT;
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else
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if ( !strncmp( psz_access, "ftpes", 5 ) )
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p_sys->tlsmode = EXPLICIT;
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else
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{
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p_sys->p_creds = NULL;
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p_sys->tlsmode = NONE;
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return 0;
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}
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p_sys->p_creds = vlc_tls_ClientCreate( obj );
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return (p_sys->p_creds != NULL) ? 0 : -1;
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}
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static int createCmdTLS( vlc_object_t *p_access, access_sys_t *p_sys,
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const char *psz_session_name )
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{
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/* TLS/SSL handshake */
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vlc_tls_t *secure = vlc_tls_ClientSessionCreate( p_sys->p_creds,
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p_sys->cmd,
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p_sys->url.psz_host,
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psz_session_name,
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NULL, NULL );
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if( secure == NULL )
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{
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msg_Err( p_access, "cannot establish FTP/TLS session on command channel" );
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return -1;
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}
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p_sys->cmd = secure;
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return 0;
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}
|
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|
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static void clearCmd( access_sys_t *p_sys )
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{
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if( p_sys->cmd != NULL )
|
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{
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vlc_tls_Close( p_sys->cmd );
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p_sys->cmd = NULL;
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}
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}
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|
|
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static int Login( vlc_object_t *p_access, access_sys_t *p_sys, const char *path )
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{
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int i_answer;
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/* *** Open a TCP connection with server *** */
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p_sys->cmd = vlc_tls_SocketOpenTCP( p_access, p_sys->url.psz_host,
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p_sys->url.i_port );
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if( p_sys->cmd == NULL )
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{
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msg_Err( p_access, "connection failed" );
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vlc_dialog_display_error( p_access, _("Network interaction failed"), "%s",
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_("VLC could not connect with the given server.") );
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goto error;
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}
|
|
|
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if ( p_sys->tlsmode == IMPLICIT ) /* FTPS Mode */
|
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{
|
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if ( createCmdTLS( p_access, p_sys, "ftps") < 0 )
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goto error;
|
|
}
|
|
|
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while( ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) == 1 );
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|
|
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if( i_answer / 100 != 2 )
|
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{
|
|
msg_Err( p_access, "connection rejected" );
|
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vlc_dialog_display_error( p_access, _("Network interaction failed"), "%s",
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_("VLC's connection to the given server was rejected.") );
|
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goto error;
|
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}
|
|
|
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msg_Dbg( p_access, "connection accepted (%d)", i_answer );
|
|
|
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/* Features check first */
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if( ftp_SendCommand( p_access, p_sys, "FEAT" ) < 0
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|| ftp_RecvAnswer( p_access, p_sys, NULL, NULL,
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FeaturesCheck, &p_sys->features ) < 0 )
|
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{
|
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msg_Err( p_access, "cannot get server features" );
|
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goto error;
|
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}
|
|
|
|
/* Create TLS Session */
|
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if( p_sys->tlsmode == EXPLICIT )
|
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{
|
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if ( ! p_sys->features.b_authtls )
|
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{
|
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msg_Err( p_access, "Server does not support TLS" );
|
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goto error;
|
|
}
|
|
|
|
if( ftp_SendCommand( p_access, p_sys, "AUTH TLS" ) < 0
|
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|| ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0
|
|
|| i_answer != 234 )
|
|
{
|
|
msg_Err( p_access, "cannot switch to TLS: server replied with code %d",
|
|
i_answer );
|
|
goto error;
|
|
}
|
|
|
|
if( createCmdTLS( p_access, p_sys, "ftpes") < 0 )
|
|
{
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
if( p_sys->tlsmode != NONE )
|
|
{
|
|
if( ftp_SendCommand( p_access, p_sys, "PBSZ 0" ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 ||
|
|
i_answer != 200 )
|
|
{
|
|
msg_Err( p_access, "Can't truncate Protection buffer size for TLS" );
|
|
goto error;
|
|
}
|
|
|
|
if( ftp_SendCommand( p_access, p_sys, "PROT P" ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 ||
|
|
i_answer != 200 )
|
|
{
|
|
msg_Err( p_access, "Can't set Data channel protection" );
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
vlc_url_t url;
|
|
vlc_credential credential;
|
|
if( vlc_UrlParseFixup( &url, path ) != 0 )
|
|
{
|
|
vlc_UrlClean( &url );
|
|
goto error;
|
|
}
|
|
vlc_credential_init( &credential, &url );
|
|
bool b_logged = false;
|
|
|
|
/* First: try credentials from url / option */
|
|
vlc_credential_get( &credential, p_access, "ftp-user", "ftp-pwd",
|
|
NULL, NULL );
|
|
do
|
|
{
|
|
const char *psz_username = credential.psz_username;
|
|
|
|
if( psz_username == NULL ) /* use anonymous by default */
|
|
psz_username = "anonymous";
|
|
|
|
if( LoginUserPwd( p_access, p_sys, psz_username,
|
|
credential.psz_password, &b_logged ) != 0
|
|
|| b_logged )
|
|
break;
|
|
}
|
|
while( vlc_credential_get( &credential, p_access, "ftp-user", "ftp-pwd",
|
|
LOGIN_DIALOG_TITLE, LOGIN_DIALOG_TEXT,
|
|
url.psz_host ) );
|
|
|
|
if( b_logged )
|
|
{
|
|
vlc_credential_store( &credential, p_access );
|
|
vlc_credential_clean( &credential );
|
|
vlc_UrlClean( &url );
|
|
return 0;
|
|
}
|
|
vlc_credential_clean( &credential );
|
|
vlc_UrlClean( &url );
|
|
error:
|
|
clearCmd( p_sys );
|
|
return -1;
|
|
}
|
|
|
|
static int LoginUserPwd( vlc_object_t *p_access, access_sys_t *p_sys,
|
|
const char *psz_user, const char *psz_pwd,
|
|
bool *p_logged )
|
|
{
|
|
int i_answer;
|
|
|
|
/* Send credentials over channel */
|
|
if( ftp_SendCommand( p_access, p_sys, "USER %s", psz_user ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 )
|
|
return -1;
|
|
|
|
switch( i_answer / 100 )
|
|
{
|
|
case 2:
|
|
/* X.509 auth successful after AUTH TLS / RFC 2228 sec. 4 */
|
|
if ( i_answer == 232 )
|
|
msg_Dbg( p_access, "user accepted and authenticated" );
|
|
else
|
|
msg_Dbg( p_access, "user accepted" );
|
|
break;
|
|
case 3:
|
|
msg_Dbg( p_access, "password needed" );
|
|
|
|
if( ftp_SendCommand( p_access, p_sys, "PASS %s", psz_pwd ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 )
|
|
return -1;
|
|
|
|
switch( i_answer / 100 )
|
|
{
|
|
case 2:
|
|
msg_Dbg( p_access, "password accepted" );
|
|
break;
|
|
case 3:
|
|
{
|
|
char *psz;
|
|
msg_Dbg( p_access, "account needed" );
|
|
psz = var_InheritString( p_access, "ftp-account" );
|
|
if( ftp_SendCommand( p_access, p_sys, "ACCT %s",
|
|
psz ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) < 0 )
|
|
{
|
|
free( psz );
|
|
return -1;
|
|
}
|
|
free( psz );
|
|
|
|
if( i_answer / 100 != 2 )
|
|
{
|
|
msg_Err( p_access, "account rejected" );
|
|
vlc_dialog_display_error( p_access,
|
|
_("Network interaction failed"),
|
|
"%s", _("Your account was rejected.") );
|
|
return -1;
|
|
}
|
|
msg_Dbg( p_access, "account accepted" );
|
|
break;
|
|
}
|
|
|
|
default:
|
|
msg_Warn( p_access, "password rejected" );
|
|
*p_logged = false;
|
|
return 0;
|
|
}
|
|
break;
|
|
default:
|
|
msg_Warn( p_access, "user rejected" );
|
|
*p_logged = false;
|
|
return 0;
|
|
}
|
|
|
|
*p_logged = true;
|
|
return 0;
|
|
}
|
|
|
|
static void FeaturesCheck( void *opaque, const char *feature )
|
|
{
|
|
ftp_features_t *features = opaque;
|
|
|
|
if( strcasestr( feature, "UTF8" ) != NULL )
|
|
features->b_unicode = true;
|
|
else
|
|
if( strcasestr( feature, "AUTH TLS" ) != NULL )
|
|
features->b_authtls = true;
|
|
|
|
if( strcasestr( feature, "MLST" ) != NULL )
|
|
features->b_mlst = true;
|
|
}
|
|
|
|
static int Connect( vlc_object_t *p_access, access_sys_t *p_sys, const char *path )
|
|
{
|
|
if( Login( p_access, p_sys, path ) < 0 )
|
|
return -1;
|
|
|
|
/* Extended passive mode */
|
|
if( ftp_SendCommand( p_access, p_sys, "EPSV ALL" ) < 0 )
|
|
{
|
|
msg_Err( p_access, "cannot request extended passive mode" );
|
|
goto error;
|
|
}
|
|
|
|
if( ftp_RecvCommand( p_access, p_sys, NULL, NULL ) == 2 )
|
|
{
|
|
int fd = vlc_tls_GetFD(p_sys->cmd);
|
|
if( net_GetPeerAddress( fd, p_sys->sz_epsv_ip, NULL ) )
|
|
goto 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.
|
|
*/
|
|
msg_Info( p_access, "FTP Extended passive mode disabled" );
|
|
clearCmd( p_sys );
|
|
|
|
if( Login( p_access, p_sys, path ) )
|
|
goto error;
|
|
}
|
|
|
|
if( p_sys->url.psz_path &&
|
|
(p_sys->features.b_unicode ? IsUTF8 : IsASCII)(p_sys->url.psz_path) == NULL )
|
|
{
|
|
msg_Err( p_access, "unsupported path: \"%s\"", p_sys->url.psz_path );
|
|
goto error;
|
|
}
|
|
|
|
/* check binary mode support */
|
|
if( ftp_SendCommand( p_access, p_sys, "TYPE I" ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, NULL, NULL ) != 2 )
|
|
{
|
|
msg_Err( p_access, "cannot set binary transfer mode" );
|
|
goto error;
|
|
}
|
|
|
|
return 0;
|
|
|
|
error:
|
|
clearCmd( p_sys );
|
|
return -1;
|
|
}
|
|
|
|
|
|
static int parseURL( vlc_url_t *url, const char *path, enum tls_mode_e mode )
|
|
{
|
|
if( path == NULL )
|
|
return VLC_EGENERIC;
|
|
|
|
/* *** Parse URL and get server addr/port and path *** */
|
|
while( *path == '/' )
|
|
path++;
|
|
|
|
vlc_UrlParseFixup( url, path );
|
|
|
|
if( url->psz_host == NULL || *url->psz_host == '\0' )
|
|
return VLC_EGENERIC;
|
|
|
|
if( url->i_port <= 0 )
|
|
{
|
|
if( mode == IMPLICIT )
|
|
url->i_port = IPPORT_FTPS;
|
|
else
|
|
url->i_port = IPPORT_FTP; /* default port */
|
|
}
|
|
|
|
if( url->psz_path == NULL )
|
|
return VLC_SUCCESS;
|
|
/* FTP URLs are relative to user's default directory (RFC1738 §3.2)
|
|
For absolute path use ftp://foo.bar//usr/local/etc/filename */
|
|
/* FIXME: we should issue a series of CWD, one per slash */
|
|
if( url->psz_path )
|
|
{
|
|
assert( url->psz_path[0] == '/' );
|
|
url->psz_path++;
|
|
}
|
|
|
|
char *type = strstr( url->psz_path, ";type=" );
|
|
if( type )
|
|
{
|
|
*type = '\0';
|
|
if( strchr( "iI", type[6] ) == NULL )
|
|
return VLC_EGENERIC; /* ASCII and directory not supported */
|
|
}
|
|
vlc_uri_decode( url->psz_path );
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
* Open: connect to ftp server and ask for file
|
|
****************************************************************************/
|
|
static int InOpen( vlc_object_t *p_this )
|
|
{
|
|
stream_t *p_access = (stream_t*)p_this;
|
|
access_sys_t *p_sys;
|
|
char *psz_arg;
|
|
bool b_directory;
|
|
|
|
/* Init p_access */
|
|
p_sys = p_access->p_sys = (access_sys_t*)vlc_obj_calloc( p_this, 1, sizeof( access_sys_t ) );
|
|
if( !p_sys )
|
|
return VLC_ENOMEM;
|
|
p_sys->data = NULL;
|
|
p_sys->out = false;
|
|
p_sys->offset = 0;
|
|
p_sys->size = UINT64_MAX;
|
|
|
|
if( readTLSMode( p_this, p_sys, p_access->psz_name ) )
|
|
goto exit_error;
|
|
|
|
if( parseURL( &p_sys->url, p_access->psz_url, p_sys->tlsmode ) )
|
|
goto exit_error;
|
|
|
|
if( Connect( p_this, p_sys, p_access->psz_url ) )
|
|
goto exit_error;
|
|
|
|
do {
|
|
/* get size */
|
|
if( p_sys->url.psz_path == NULL || !*p_sys->url.psz_path )
|
|
{
|
|
b_directory = true;
|
|
break;
|
|
}
|
|
|
|
if( ftp_SendCommand( p_this, p_sys, "SIZE %s",
|
|
p_sys->url.psz_path ) < 0 )
|
|
goto error;
|
|
|
|
int val = ftp_RecvCommand( p_this, p_sys, NULL, &psz_arg );
|
|
if( val == 2 )
|
|
{
|
|
b_directory = false;
|
|
p_sys->size = atoll( &psz_arg[4] );
|
|
free( psz_arg );
|
|
msg_Dbg( p_access, "file size: %"PRIu64, p_sys->size );
|
|
break;
|
|
}
|
|
if( val >= 0 )
|
|
free( psz_arg );
|
|
|
|
if( ftp_SendCommand( p_this, p_sys, "CWD %s",
|
|
p_sys->url.psz_path ) < 0 )
|
|
goto error;
|
|
|
|
if( ftp_RecvCommand( p_this, p_sys, NULL, NULL ) == 2 )
|
|
{
|
|
b_directory = true;
|
|
break;
|
|
}
|
|
|
|
msg_Err( p_this, "file or directory does not exist" );
|
|
goto error;
|
|
} while (0);
|
|
|
|
if( b_directory )
|
|
{
|
|
p_access->pf_readdir = DirRead;
|
|
p_access->pf_control = access_vaDirectoryControlHelper;
|
|
} else
|
|
ACCESS_SET_CALLBACKS( Read, NULL, Control, Seek ); \
|
|
|
|
/* Start the 'stream' */
|
|
if( ftp_StartStream( p_this, p_sys, 0, b_directory ) < 0 )
|
|
{
|
|
msg_Err( p_this, "cannot retrieve file" );
|
|
goto error;
|
|
}
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
error:
|
|
clearCmd( p_sys );
|
|
|
|
exit_error:
|
|
vlc_UrlClean( &p_sys->url );
|
|
vlc_tls_ClientDelete( p_sys->p_creds );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
#ifdef ENABLE_SOUT
|
|
static int OutOpen( vlc_object_t *p_this )
|
|
{
|
|
sout_access_out_t *p_access = (sout_access_out_t *)p_this;
|
|
access_sys_t *p_sys;
|
|
|
|
p_sys = vlc_obj_calloc( p_this, 1, sizeof( *p_sys ) );
|
|
if( !p_sys )
|
|
return VLC_ENOMEM;
|
|
|
|
/* Init p_access */
|
|
p_sys->data = NULL;
|
|
p_sys->out = true;
|
|
|
|
if( readTLSMode( p_this, p_sys, p_access->psz_access ) )
|
|
goto exit_error;
|
|
|
|
if( parseURL( &p_sys->url, p_access->psz_path, p_sys->tlsmode ) )
|
|
goto exit_error;
|
|
if( p_sys->url.psz_path == NULL )
|
|
{
|
|
msg_Err( p_this, "no filename specified" );
|
|
goto exit_error;
|
|
}
|
|
|
|
if( Connect( p_this, p_sys, p_access->psz_path ) )
|
|
goto exit_error;
|
|
|
|
/* Start the 'stream' */
|
|
if( ftp_StartStream( p_this, p_sys, 0, false ) < 0 )
|
|
{
|
|
msg_Err( p_access, "cannot store file" );
|
|
clearCmd( p_sys );
|
|
goto exit_error;
|
|
}
|
|
|
|
p_access->pf_seek = OutSeek;
|
|
p_access->pf_write = Write;
|
|
p_access->p_sys = (void *)p_sys;
|
|
|
|
return VLC_SUCCESS;
|
|
|
|
exit_error:
|
|
vlc_UrlClean( &p_sys->url );
|
|
vlc_tls_ClientDelete( p_sys->p_creds );
|
|
return VLC_EGENERIC;
|
|
}
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* Close: free unused data structures
|
|
*****************************************************************************/
|
|
static void Close( vlc_object_t *p_access, access_sys_t *p_sys )
|
|
{
|
|
msg_Dbg( p_access, "stopping stream" );
|
|
ftp_StopStream( p_access, p_sys );
|
|
|
|
if( ftp_SendCommand( p_access, p_sys, "QUIT" ) < 0 )
|
|
{
|
|
msg_Warn( p_access, "cannot quit" );
|
|
}
|
|
else
|
|
{
|
|
ftp_RecvCommand( p_access, p_sys, NULL, NULL );
|
|
}
|
|
|
|
clearCmd( p_sys );
|
|
|
|
/* free memory */
|
|
vlc_UrlClean( &p_sys->url );
|
|
vlc_tls_ClientDelete( p_sys->p_creds );
|
|
}
|
|
|
|
static void InClose( vlc_object_t *p_this )
|
|
{
|
|
Close( p_this, ((stream_t *)p_this)->p_sys);
|
|
}
|
|
|
|
#ifdef ENABLE_SOUT
|
|
static void OutClose( vlc_object_t *p_this )
|
|
{
|
|
Close( p_this, GET_OUT_SYS(p_this));
|
|
}
|
|
#endif
|
|
|
|
|
|
/*****************************************************************************
|
|
* Seek: try to go at the right place
|
|
*****************************************************************************/
|
|
static int SeekCommon( vlc_object_t *p_access, access_sys_t *p_sys,
|
|
uint64_t i_pos )
|
|
{
|
|
msg_Dbg( p_access, "seeking to %"PRIu64, i_pos );
|
|
|
|
ftp_StopStream( p_access, p_sys );
|
|
|
|
if( ftp_StartStream( p_access, p_sys, i_pos, false ) < 0 )
|
|
return VLC_EGENERIC;
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
static int Seek( stream_t *p_access, uint64_t i_pos )
|
|
{
|
|
access_sys_t *p_sys = p_access->p_sys;
|
|
|
|
int val = SeekCommon( (vlc_object_t *)p_access, p_sys, i_pos );
|
|
if( val )
|
|
return val;
|
|
|
|
p_sys->offset = i_pos;
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
#ifdef ENABLE_SOUT
|
|
static int OutSeek( sout_access_out_t *p_access, off_t i_pos )
|
|
{
|
|
return SeekCommon((vlc_object_t *)p_access, GET_OUT_SYS(p_access), i_pos);
|
|
}
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* Read:
|
|
*****************************************************************************/
|
|
static ssize_t Read( stream_t *p_access, void *p_buffer, size_t i_len )
|
|
{
|
|
access_sys_t *p_sys = p_access->p_sys;
|
|
|
|
if( p_sys->data == NULL )
|
|
return 0;
|
|
assert( !p_sys->out );
|
|
|
|
ssize_t i_read = vlc_tls_Read( p_sys->data, p_buffer, i_len, false );
|
|
if( i_read >= 0 )
|
|
p_sys->offset += i_read;
|
|
else if( errno != EINTR && errno != EAGAIN )
|
|
{
|
|
msg_Err( p_access, "receive error: %s", vlc_strerror_c(errno) );
|
|
i_read = 0;
|
|
}
|
|
|
|
return i_read;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* DirRead:
|
|
*****************************************************************************/
|
|
static int DirRead (stream_t *p_access, input_item_node_t *p_current_node)
|
|
{
|
|
access_sys_t *p_sys = p_access->p_sys;
|
|
int i_ret = VLC_SUCCESS;
|
|
|
|
assert( p_sys->data != NULL );
|
|
assert( !p_sys->out );
|
|
|
|
struct vlc_readdir_helper rdh;
|
|
vlc_readdir_helper_init( &rdh, p_access, p_current_node );
|
|
|
|
while (i_ret == VLC_SUCCESS)
|
|
{
|
|
char *psz_file;
|
|
int type = ITEM_TYPE_UNKNOWN;
|
|
|
|
char *psz_line = vlc_tls_GetLine( p_sys->data );
|
|
if( psz_line == NULL )
|
|
break;
|
|
|
|
if( p_sys->features.b_mlst )
|
|
{
|
|
/* MLST Format is key=val;key=val...; FILENAME */
|
|
if( strstr( psz_line, "type=dir" ) )
|
|
type = ITEM_TYPE_DIRECTORY;
|
|
if( strstr( psz_line, "type=file" ) )
|
|
type = ITEM_TYPE_FILE;
|
|
|
|
/* Get the filename or fail */
|
|
psz_file = strchr( psz_line, ' ' );
|
|
if( psz_file )
|
|
psz_file++;
|
|
else
|
|
{
|
|
msg_Warn( p_access, "Empty filename in MLST list" );
|
|
free( psz_line );
|
|
continue;
|
|
}
|
|
}
|
|
else
|
|
psz_file = psz_line;
|
|
|
|
char *psz_uri;
|
|
char *psz_filename = vlc_uri_encode( psz_file );
|
|
if( psz_filename != NULL &&
|
|
asprintf( &psz_uri, "%s://%s:%d%s%s/%s",
|
|
( p_sys->tlsmode == NONE ) ? "ftp" :
|
|
( ( p_sys->tlsmode == IMPLICIT ) ? "ftps" : "ftpes" ),
|
|
p_sys->url.psz_host, p_sys->url.i_port,
|
|
p_sys->url.psz_path ? "/" : "",
|
|
p_sys->url.psz_path ? p_sys->url.psz_path : "",
|
|
psz_filename ) != -1 )
|
|
{
|
|
i_ret = vlc_readdir_helper_additem( &rdh, psz_uri, NULL, psz_file,
|
|
type, ITEM_NET );
|
|
free( psz_uri );
|
|
}
|
|
free( psz_filename );
|
|
free( psz_line );
|
|
}
|
|
|
|
vlc_readdir_helper_finish( &rdh, i_ret == VLC_SUCCESS );
|
|
return i_ret;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Write:
|
|
*****************************************************************************/
|
|
#ifdef ENABLE_SOUT
|
|
static ssize_t Write( sout_access_out_t *p_access, block_t *p_buffer )
|
|
{
|
|
access_sys_t *p_sys = GET_OUT_SYS(p_access);
|
|
size_t i_write = 0;
|
|
|
|
assert( p_sys->data != NULL );
|
|
|
|
while( p_buffer != NULL )
|
|
{
|
|
block_t *p_next = p_buffer->p_next;
|
|
|
|
i_write += vlc_tls_Write( p_sys->data,
|
|
p_buffer->p_buffer, p_buffer->i_buffer );
|
|
block_Release( p_buffer );
|
|
|
|
p_buffer = p_next;
|
|
}
|
|
|
|
return i_write;
|
|
}
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* Control:
|
|
*****************************************************************************/
|
|
static int Control( stream_t *p_access, int i_query, va_list args )
|
|
{
|
|
access_sys_t *sys = p_access->p_sys;
|
|
bool *pb_bool;
|
|
|
|
switch( i_query )
|
|
{
|
|
case STREAM_CAN_SEEK:
|
|
pb_bool = va_arg( args, bool * );
|
|
*pb_bool = true;
|
|
break;
|
|
case STREAM_CAN_FASTSEEK:
|
|
pb_bool = va_arg( args, bool * );
|
|
*pb_bool = false;
|
|
break;
|
|
case STREAM_CAN_PAUSE:
|
|
pb_bool = va_arg( args, bool * );
|
|
*pb_bool = true; /* FIXME */
|
|
break;
|
|
case STREAM_CAN_CONTROL_PACE:
|
|
pb_bool = va_arg( args, bool * );
|
|
*pb_bool = true; /* FIXME */
|
|
break;
|
|
case STREAM_GET_SIZE:
|
|
if( sys->size == UINT64_MAX )
|
|
return VLC_EGENERIC;
|
|
*va_arg( args, uint64_t * ) = sys->size;
|
|
break;
|
|
|
|
case STREAM_GET_PTS_DELAY:
|
|
*va_arg( args, vlc_tick_t * ) =
|
|
VLC_TICK_FROM_MS(var_InheritInteger( p_access, "network-caching" ));
|
|
break;
|
|
|
|
case STREAM_SET_PAUSE_STATE:
|
|
pb_bool = va_arg( args, bool * );
|
|
if ( !pb_bool )
|
|
return Seek( p_access, sys->offset );
|
|
break;
|
|
|
|
default:
|
|
return VLC_EGENERIC;
|
|
|
|
}
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
static int ftp_StartStream( vlc_object_t *p_access, access_sys_t *p_sys,
|
|
uint64_t i_start, bool b_directory )
|
|
{
|
|
char psz_ipv4[16], *psz_ip = p_sys->sz_epsv_ip;
|
|
int i_answer;
|
|
char *psz_arg, *psz_parser;
|
|
int i_port;
|
|
|
|
assert( p_sys->data == NULL );
|
|
|
|
if( ( ftp_SendCommand( p_access, p_sys, *psz_ip ? "EPSV" : "PASV" ) < 0 )
|
|
|| ( ftp_RecvCommand( p_access, p_sys, &i_answer, &psz_arg ) != 2 ) )
|
|
{
|
|
msg_Err( p_access, "cannot set passive mode" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
psz_parser = strchr( psz_arg, '(' );
|
|
if( psz_parser == NULL )
|
|
{
|
|
free( psz_arg );
|
|
msg_Err( p_access, "cannot parse passive mode response" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
if( *psz_ip )
|
|
{
|
|
if( sscanf( psz_parser, "(%*3c%u", &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 );
|
|
|
|
msg_Dbg( p_access, "ip:%s port:%d", psz_ip, i_port );
|
|
|
|
if( ftp_SendCommand( p_access, p_sys, "TYPE I" ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) != 2 )
|
|
{
|
|
msg_Err( p_access, "cannot set binary transfer mode" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
|
|
if( i_start > 0 )
|
|
{
|
|
if( ftp_SendCommand( p_access, p_sys, "REST %"PRIu64, i_start ) < 0 ||
|
|
ftp_RecvCommand( p_access, p_sys, &i_answer, NULL ) > 3 )
|
|
{
|
|
msg_Err( p_access, "cannot set restart offset" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
}
|
|
|
|
msg_Dbg( p_access, "waiting for data connection..." );
|
|
p_sys->data = vlc_tls_SocketOpenTCP( p_access, psz_ip, i_port );
|
|
if( p_sys->data == NULL )
|
|
{
|
|
msg_Err( p_access, "failed to connect with server" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
msg_Dbg( p_access, "connection with \"%s:%d\" successful",
|
|
psz_ip, i_port );
|
|
|
|
if( b_directory )
|
|
{
|
|
if( p_sys->features.b_mlst &&
|
|
ftp_SendCommand( p_access, p_sys, "MLSD" ) >= 0 &&
|
|
ftp_RecvCommandInit( p_access, p_sys ) == 1 )
|
|
{
|
|
msg_Dbg( p_access, "Using MLST extension to list" );
|
|
}
|
|
else
|
|
if( ftp_SendCommand( p_access, p_sys, "NLST" ) < 0 ||
|
|
ftp_RecvCommandInit( p_access, p_sys ) == 1 )
|
|
{
|
|
msg_Err( p_access, "cannot list directory contents" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* "1xx" message */
|
|
assert( p_sys->url.psz_path );
|
|
if( ftp_SendCommand( p_access, p_sys, "%s %s",
|
|
p_sys->out ? "STOR" : "RETR",
|
|
p_sys->url.psz_path ) < 0
|
|
|| ftp_RecvCommandInit( p_access, p_sys ) != 1 )
|
|
{
|
|
msg_Err( p_access, "cannot retrieve file" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
}
|
|
|
|
if( p_sys->tlsmode != NONE )
|
|
{
|
|
/* FIXME: Do Reuse TLS Session */
|
|
/* TLS/SSL handshake */
|
|
vlc_tls_t *secure = vlc_tls_ClientSessionCreate( p_sys->p_creds,
|
|
p_sys->data, p_sys->url.psz_host,
|
|
( p_sys->tlsmode == EXPLICIT ) ? "ftpes-data"
|
|
: "ftps-data",
|
|
NULL, NULL );
|
|
if( secure == NULL )
|
|
{
|
|
msg_Err( p_access, "cannot establish FTP/TLS session for data" \
|
|
": server not allowing new session ?" );
|
|
return VLC_EGENERIC;
|
|
}
|
|
p_sys->data = secure;
|
|
}
|
|
|
|
return VLC_SUCCESS;
|
|
}
|
|
|
|
static int ftp_StopStream ( vlc_object_t *p_access, access_sys_t *p_sys )
|
|
{
|
|
int ret = VLC_SUCCESS;
|
|
|
|
if( ftp_SendCommand( p_access, p_sys, "ABOR" ) < 0 )
|
|
{
|
|
msg_Warn( p_access, "cannot abort file" );
|
|
ret = VLC_EGENERIC;
|
|
}
|
|
|
|
if( p_sys->data != NULL )
|
|
{
|
|
vlc_tls_Close( p_sys->data );
|
|
p_sys->data = NULL;
|
|
|
|
if( ret == VLC_SUCCESS )
|
|
/* Read the final response from RETR/STOR, i.e. 426 or 226 */
|
|
ftp_RecvCommand( p_access, p_sys, NULL, NULL );
|
|
}
|
|
|
|
if( ret == VLC_SUCCESS )
|
|
/* Read the response from ABOR, i.e. 226 or 225 */
|
|
ftp_RecvCommand( p_access, p_sys, NULL, NULL );
|
|
|
|
return ret;
|
|
}
|