4198 lines
123 KiB
C
4198 lines
123 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2008, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* $Id: ftp.c,v 1.490 2008-11-06 17:19:57 yangtse Exp $
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***************************************************************************/
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#include "setup.h"
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#ifndef CURL_DISABLE_FTP
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <ctype.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifndef WIN32
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef HAVE_UTSNAME_H
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#include <sys/utsname.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef VMS
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#include <in.h>
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#include <inet.h>
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#endif
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#endif /* !WIN32 */
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#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
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#undef in_addr_t
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#define in_addr_t unsigned long
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#endif
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#include <curl/curl.h>
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#include "urldata.h"
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#include "sendf.h"
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#include "easyif.h" /* for Curl_convert_... prototypes */
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#include "if2ip.h"
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#include "hostip.h"
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#include "progress.h"
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#include "transfer.h"
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#include "escape.h"
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#include "http.h" /* for HTTP proxy tunnel stuff */
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#include "socks.h"
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#include "ftp.h"
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#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
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#include "krb4.h"
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#endif
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#include "strtoofft.h"
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#include "strequal.h"
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#include "sslgen.h"
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#include "connect.h"
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#include "strerror.h"
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#include "inet_ntop.h"
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#include "inet_pton.h"
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#include "select.h"
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#include "parsedate.h" /* for the week day and month names */
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#include "sockaddr.h" /* required for Curl_sockaddr_storage */
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#include "multiif.h"
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#include "url.h"
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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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#include "memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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#ifdef HAVE_NI_WITHSCOPEID
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#define NIFLAGS NI_NUMERICHOST | NI_NUMERICSERV | NI_WITHSCOPEID
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#else
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#define NIFLAGS NI_NUMERICHOST | NI_NUMERICSERV
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#endif
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#ifdef __SYMBIAN32__
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/* Symbian OS panics when given a timeout much greater than 1/2 hour */
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#define RESP_TIMEOUT (1800*1000)
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#else
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/* Default response timeout in milliseconds */
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#define RESP_TIMEOUT (3600*1000)
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#endif
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#ifdef CURL_DISABLE_VERBOSE_STRINGS
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#define ftp_pasv_verbose(a,b,c,d) do { } while(0)
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#endif
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/* Local API functions */
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static CURLcode ftp_sendquote(struct connectdata *conn,
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struct curl_slist *quote);
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static CURLcode ftp_quit(struct connectdata *conn);
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static CURLcode ftp_parse_url_path(struct connectdata *conn);
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static CURLcode ftp_regular_transfer(struct connectdata *conn, bool *done);
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#ifndef CURL_DISABLE_VERBOSE_STRINGS
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static void ftp_pasv_verbose(struct connectdata *conn,
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Curl_addrinfo *ai,
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char *newhost, /* ascii version */
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int port);
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#endif
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static CURLcode ftp_state_post_rest(struct connectdata *conn);
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static CURLcode ftp_state_post_cwd(struct connectdata *conn);
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static CURLcode ftp_state_quote(struct connectdata *conn,
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bool init, ftpstate instate);
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static CURLcode ftp_nb_type(struct connectdata *conn,
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bool ascii, ftpstate newstate);
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static int ftp_need_type(struct connectdata *conn,
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bool ascii);
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static CURLcode ftp_do(struct connectdata *conn, bool *done);
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static CURLcode ftp_done(struct connectdata *conn,
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CURLcode, bool premature);
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static CURLcode ftp_connect(struct connectdata *conn, bool *done);
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static CURLcode ftp_disconnect(struct connectdata *conn);
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static CURLcode ftp_nextconnect(struct connectdata *conn);
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static CURLcode ftp_multi_statemach(struct connectdata *conn, bool *done);
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static int ftp_getsock(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks);
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static CURLcode ftp_doing(struct connectdata *conn,
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bool *dophase_done);
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static CURLcode ftp_setup_connection(struct connectdata * conn);
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#ifdef USE_SSL
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static CURLcode ftps_setup_connection(struct connectdata * conn);
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#endif
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/* easy-to-use macro: */
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#define FTPSENDF(x,y,z) if((result = Curl_ftpsendf(x,y,z)) != CURLE_OK) \
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return result
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#define NBFTPSENDF(x,y,z) if((result = Curl_nbftpsendf(x,y,z)) != CURLE_OK) \
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return result
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/*
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* FTP protocol handler.
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*/
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const struct Curl_handler Curl_handler_ftp = {
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"FTP", /* scheme */
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ftp_setup_connection, /* setup_connection */
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ftp_do, /* do_it */
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ftp_done, /* done */
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ftp_nextconnect, /* do_more */
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ftp_connect, /* connect_it */
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ftp_multi_statemach, /* connecting */
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ftp_doing, /* doing */
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ftp_getsock, /* proto_getsock */
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ftp_getsock, /* doing_getsock */
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ftp_disconnect, /* disconnect */
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PORT_FTP, /* defport */
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PROT_FTP /* protocol */
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};
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#ifdef USE_SSL
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/*
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* FTPS protocol handler.
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*/
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const struct Curl_handler Curl_handler_ftps = {
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"FTPS", /* scheme */
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ftps_setup_connection, /* setup_connection */
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ftp_do, /* do_it */
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ftp_done, /* done */
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ftp_nextconnect, /* do_more */
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ftp_connect, /* connect_it */
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ftp_multi_statemach, /* connecting */
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ftp_doing, /* doing */
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ftp_getsock, /* proto_getsock */
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ftp_getsock, /* doing_getsock */
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ftp_disconnect, /* disconnect */
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PORT_FTPS, /* defport */
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PROT_FTP | PROT_FTPS | PROT_SSL /* protocol */
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};
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#endif
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#ifndef CURL_DISABLE_HTTP
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/*
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* HTTP-proxyed FTP protocol handler.
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*/
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const struct Curl_handler Curl_handler_ftp_proxy = {
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"FTP", /* scheme */
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ZERO_NULL, /* setup_connection */
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Curl_http, /* do_it */
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Curl_http_done, /* done */
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ZERO_NULL, /* do_more */
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ZERO_NULL, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* disconnect */
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PORT_FTP, /* defport */
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PROT_HTTP /* protocol */
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};
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#ifdef USE_SSL
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/*
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* HTTP-proxyed FTPS protocol handler.
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*/
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const struct Curl_handler Curl_handler_ftps_proxy = {
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"FTPS", /* scheme */
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ZERO_NULL, /* setup_connection */
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Curl_http, /* do_it */
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Curl_http_done, /* done */
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ZERO_NULL, /* do_more */
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ZERO_NULL, /* connect_it */
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ZERO_NULL, /* connecting */
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ZERO_NULL, /* doing */
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ZERO_NULL, /* proto_getsock */
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ZERO_NULL, /* doing_getsock */
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ZERO_NULL, /* disconnect */
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PORT_FTPS, /* defport */
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PROT_HTTP /* protocol */
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};
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#endif
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#endif
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/*
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* NOTE: back in the old days, we added code in the FTP code that made NOBODY
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* requests on files respond with headers passed to the client/stdout that
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* looked like HTTP ones.
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*
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* This approach is not very elegant, it causes confusion and is error-prone.
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* It is subject for removal at the next (or at least a future) soname bump.
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* Until then you can test the effects of the removal by undefining the
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* following define named CURL_FTP_HTTPSTYLE_HEAD.
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*/
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#define CURL_FTP_HTTPSTYLE_HEAD 1
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static void freedirs(struct ftp_conn *ftpc)
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{
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int i;
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if(ftpc->dirs) {
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for (i=0; i < ftpc->dirdepth; i++){
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if(ftpc->dirs[i]) {
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free(ftpc->dirs[i]);
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ftpc->dirs[i]=NULL;
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}
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}
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free(ftpc->dirs);
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ftpc->dirs = NULL;
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ftpc->dirdepth = 0;
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}
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if(ftpc->file) {
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free(ftpc->file);
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ftpc->file = NULL;
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}
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}
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/* Returns non-zero if the given string contains CR (\r) or LF (\n),
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which are not allowed within RFC 959 <string>.
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Note: The input string is in the client's encoding which might
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not be ASCII, so escape sequences \r & \n must be used instead
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of hex values 0x0d & 0x0a.
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*/
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static bool isBadFtpString(const char *string)
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{
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return (bool)((NULL != strchr(string, '\r')) || (NULL != strchr(string, '\n')));
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}
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/***********************************************************************
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*
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* AllowServerConnect()
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*
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* When we've issue the PORT command, we have told the server to connect
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* to us. This function will sit and wait here until the server has
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* connected.
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*
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*/
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static CURLcode AllowServerConnect(struct connectdata *conn)
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{
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struct SessionHandle *data = conn->data;
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curl_socket_t sock = conn->sock[SECONDARYSOCKET];
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long timeout_ms = Curl_timeleft(conn, NULL, TRUE);
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if(timeout_ms < 0) {
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/* if a timeout was already reached, bail out */
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failf(data, "Timed out before server could connect to us");
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return CURLE_OPERATION_TIMEDOUT;
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}
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switch (Curl_socket_ready(sock, CURL_SOCKET_BAD, (int)timeout_ms)) {
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case -1: /* error */
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/* let's die here */
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failf(data, "Error while waiting for server connect");
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return CURLE_FTP_PORT_FAILED;
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case 0: /* timeout */
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/* let's die here */
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failf(data, "Timeout while waiting for server connect");
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return CURLE_FTP_PORT_FAILED;
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default:
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/* we have received data here */
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{
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curl_socket_t s = CURL_SOCKET_BAD;
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#ifdef ENABLE_IPV6
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struct Curl_sockaddr_storage add;
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#else
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struct sockaddr_in add;
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#endif
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socklen_t size = (socklen_t) sizeof(add);
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if(0 == getsockname(sock, (struct sockaddr *) &add, &size)) {
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size = sizeof(add);
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s=accept(sock, (struct sockaddr *) &add, &size);
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}
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sclose(sock); /* close the first socket */
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if(CURL_SOCKET_BAD == s) {
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/* DIE! */
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failf(data, "Error accept()ing server connect");
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return CURLE_FTP_PORT_FAILED;
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}
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infof(data, "Connection accepted from server\n");
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conn->sock[SECONDARYSOCKET] = s;
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Curl_nonblock(s, TRUE); /* enable non-blocking */
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}
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break;
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}
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return CURLE_OK;
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}
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/* initialize stuff to prepare for reading a fresh new response */
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static void ftp_respinit(struct connectdata *conn)
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{
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struct ftp_conn *ftpc = &conn->proto.ftpc;
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ftpc->nread_resp = 0;
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ftpc->linestart_resp = conn->data->state.buffer;
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}
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/* macro to check for a three-digit ftp status code at the start of the
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given string */
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#define STATUSCODE(line) (ISDIGIT(line[0]) && ISDIGIT(line[1]) && \
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ISDIGIT(line[2]))
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/* macro to check for the last line in an FTP server response */
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#define LASTLINE(line) (STATUSCODE(line) && (' ' == line[3]))
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static CURLcode ftp_readresp(curl_socket_t sockfd,
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struct connectdata *conn,
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int *ftpcode, /* return the ftp-code if done */
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size_t *size) /* size of the response */
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{
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ssize_t perline; /* count bytes per line */
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bool keepon=TRUE;
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ssize_t gotbytes;
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char *ptr;
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struct SessionHandle *data = conn->data;
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char * const buf = data->state.buffer;
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CURLcode result = CURLE_OK;
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struct ftp_conn *ftpc = &conn->proto.ftpc;
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int code = 0;
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*ftpcode = 0; /* 0 for errors or not done */
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*size = 0;
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ptr=buf + ftpc->nread_resp;
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/* number of bytes in the current line, so far */
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perline = (ssize_t)(ptr-ftpc->linestart_resp);
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keepon=TRUE;
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while((ftpc->nread_resp<BUFSIZE) && (keepon && !result)) {
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if(ftpc->cache) {
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/* we had data in the "cache", copy that instead of doing an actual
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* read
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*
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* ftp->cache_size is cast to int here. This should be safe,
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* because it would have been populated with something of size
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* int to begin with, even though its datatype may be larger
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* than an int.
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*/
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DEBUGASSERT((ptr+ftpc->cache_size) <= (buf+BUFSIZE+1));
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memcpy(ptr, ftpc->cache, (int)ftpc->cache_size);
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gotbytes = (int)ftpc->cache_size;
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free(ftpc->cache); /* free the cache */
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ftpc->cache = NULL; /* clear the pointer */
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ftpc->cache_size = 0; /* zero the size just in case */
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}
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else {
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int res;
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#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
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enum protection_level prot = conn->data_prot;
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conn->data_prot = 0;
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#endif
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DEBUGASSERT((ptr+BUFSIZE-ftpc->nread_resp) <= (buf+BUFSIZE+1));
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res = Curl_read(conn, sockfd, ptr, BUFSIZE-ftpc->nread_resp,
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&gotbytes);
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#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
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conn->data_prot = prot;
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#endif
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if(res < 0)
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/* EWOULDBLOCK */
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return CURLE_OK; /* return */
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#ifdef CURL_DOES_CONVERSIONS
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if((res == CURLE_OK) && (gotbytes > 0)) {
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/* convert from the network encoding */
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result = res = Curl_convert_from_network(data, ptr, gotbytes);
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/* Curl_convert_from_network calls failf if unsuccessful */
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}
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#endif /* CURL_DOES_CONVERSIONS */
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if(CURLE_OK != res)
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keepon = FALSE;
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}
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if(!keepon)
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;
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else if(gotbytes <= 0) {
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keepon = FALSE;
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result = CURLE_RECV_ERROR;
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failf(data, "FTP response reading failed");
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}
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else {
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/* we got a whole chunk of data, which can be anything from one
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* byte to a set of lines and possible just a piece of the last
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* line */
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ssize_t i;
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ssize_t clipamount = 0;
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bool restart = FALSE;
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data->req.headerbytecount += gotbytes;
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ftpc->nread_resp += gotbytes;
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for(i = 0; i < gotbytes; ptr++, i++) {
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perline++;
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if(*ptr=='\n') {
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/* a newline is CRLF in ftp-talk, so the CR is ignored as
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the line isn't really terminated until the LF comes */
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/* output debug output if that is requested */
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#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
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if(!conn->sec_complete)
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#endif
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if(data->set.verbose)
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Curl_debug(data, CURLINFO_HEADER_IN,
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ftpc->linestart_resp, (size_t)perline, conn);
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/*
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* We pass all response-lines to the callback function registered
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* for "headers". The response lines can be seen as a kind of
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* headers.
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*/
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result = Curl_client_write(conn, CLIENTWRITE_HEADER,
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ftpc->linestart_resp, perline);
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if(result)
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return result;
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if(perline>3 && LASTLINE(ftpc->linestart_resp)) {
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/* This is the end of the last line, copy the last line to the
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start of the buffer and zero terminate, for old times sake (and
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krb4)! */
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char *meow;
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int n;
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for(meow=ftpc->linestart_resp, n=0; meow<ptr; meow++, n++)
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buf[n] = *meow;
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*meow=0; /* zero terminate */
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keepon=FALSE;
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ftpc->linestart_resp = ptr+1; /* advance pointer */
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i++; /* skip this before getting out */
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*size = ftpc->nread_resp; /* size of the response */
|
|
ftpc->nread_resp = 0; /* restart */
|
|
break;
|
|
}
|
|
perline=0; /* line starts over here */
|
|
ftpc->linestart_resp = ptr+1;
|
|
}
|
|
}
|
|
|
|
if(!keepon && (i != gotbytes)) {
|
|
/* We found the end of the response lines, but we didn't parse the
|
|
full chunk of data we have read from the server. We therefore need
|
|
to store the rest of the data to be checked on the next invoke as
|
|
it may actually contain another end of response already! */
|
|
clipamount = gotbytes - i;
|
|
restart = TRUE;
|
|
}
|
|
else if(keepon) {
|
|
|
|
if((perline == gotbytes) && (gotbytes > BUFSIZE/2)) {
|
|
/* We got an excessive line without newlines and we need to deal
|
|
with it. First, check if it seems to start with a valid status
|
|
code and then we keep just that in the line cache. Then throw
|
|
away the rest. */
|
|
infof(data, "Excessive FTP response line length received, %zd bytes."
|
|
" Stripping\n", gotbytes);
|
|
restart = TRUE;
|
|
if(STATUSCODE(ftpc->linestart_resp))
|
|
/* we copy 4 bytes since after the three-digit number there is a
|
|
dash or a space and it is significant */
|
|
clipamount = 4;
|
|
}
|
|
else if(ftpc->nread_resp > BUFSIZE/2) {
|
|
/* We got a large chunk of data and there's potentially still trailing
|
|
data to take care of, so we put any such part in the "cache", clear
|
|
the buffer to make space and restart. */
|
|
clipamount = perline;
|
|
restart = TRUE;
|
|
}
|
|
}
|
|
else if(i == gotbytes)
|
|
restart = TRUE;
|
|
|
|
if(clipamount) {
|
|
ftpc->cache_size = clipamount;
|
|
ftpc->cache = malloc((int)ftpc->cache_size);
|
|
if(ftpc->cache)
|
|
memcpy(ftpc->cache, ftpc->linestart_resp, (int)ftpc->cache_size);
|
|
else
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
if(restart) {
|
|
/* now reset a few variables to start over nicely from the start of
|
|
the big buffer */
|
|
ftpc->nread_resp = 0; /* start over from scratch in the buffer */
|
|
ptr = ftpc->linestart_resp = buf;
|
|
perline = 0;
|
|
}
|
|
|
|
} /* there was data */
|
|
|
|
} /* while there's buffer left and loop is requested */
|
|
|
|
if(!result)
|
|
code = atoi(buf);
|
|
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
/* handle the security-oriented responses 6xx ***/
|
|
/* FIXME: some errorchecking perhaps... ***/
|
|
switch(code) {
|
|
case 631:
|
|
code = Curl_sec_read_msg(conn, buf, prot_safe);
|
|
break;
|
|
case 632:
|
|
code = Curl_sec_read_msg(conn, buf, prot_private);
|
|
break;
|
|
case 633:
|
|
code = Curl_sec_read_msg(conn, buf, prot_confidential);
|
|
break;
|
|
default:
|
|
/* normal ftp stuff we pass through! */
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
*ftpcode=code; /* return the initial number like this */
|
|
|
|
/* store the latest code for later retrieval */
|
|
conn->data->info.httpcode=code;
|
|
|
|
return result;
|
|
}
|
|
|
|
/* --- parse FTP server responses --- */
|
|
|
|
/*
|
|
* Curl_GetFTPResponse() is a BLOCKING function to read the full response
|
|
* from a server after a command.
|
|
*
|
|
*/
|
|
|
|
CURLcode Curl_GetFTPResponse(ssize_t *nreadp, /* return number of bytes read */
|
|
struct connectdata *conn,
|
|
int *ftpcode) /* return the ftp-code */
|
|
{
|
|
/*
|
|
* We cannot read just one byte per read() and then go back to select() as
|
|
* the OpenSSL read() doesn't grok that properly.
|
|
*
|
|
* Alas, read as much as possible, split up into lines, use the ending
|
|
* line in a response or continue reading. */
|
|
|
|
curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
|
long timeout; /* timeout in milliseconds */
|
|
long interval_ms;
|
|
struct SessionHandle *data = conn->data;
|
|
CURLcode result = CURLE_OK;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
struct timeval now = Curl_tvnow();
|
|
size_t nread;
|
|
int cache_skip=0;
|
|
int value_to_be_ignored=0;
|
|
|
|
if(ftpcode)
|
|
*ftpcode = 0; /* 0 for errors */
|
|
else
|
|
/* make the pointer point to something for the rest of this function */
|
|
ftpcode = &value_to_be_ignored;
|
|
|
|
*nreadp=0;
|
|
|
|
while(!*ftpcode && !result) {
|
|
/* check and reset timeout value every lap */
|
|
if(data->set.ftp_response_timeout )
|
|
/* if CURLOPT_FTP_RESPONSE_TIMEOUT is set, use that to determine
|
|
remaining time. Also, use "now" as opposed to "conn->now"
|
|
because ftp_response_timeout is only supposed to govern
|
|
the response for any given ftp response, not for the time
|
|
from connect to the given ftp response. */
|
|
timeout = data->set.ftp_response_timeout - /* timeout time */
|
|
Curl_tvdiff(Curl_tvnow(), now); /* spent time */
|
|
else if(data->set.timeout)
|
|
/* if timeout is requested, find out how much remaining time we have */
|
|
timeout = data->set.timeout - /* timeout time */
|
|
Curl_tvdiff(Curl_tvnow(), conn->now); /* spent time */
|
|
else
|
|
/* Even without a requested timeout, we only wait response_time
|
|
seconds for the full response to arrive before we bail out */
|
|
timeout = ftpc->response_time -
|
|
Curl_tvdiff(Curl_tvnow(), now); /* spent time */
|
|
|
|
if(timeout <=0 ) {
|
|
failf(data, "FTP response timeout");
|
|
return CURLE_OPERATION_TIMEDOUT; /* already too little time */
|
|
}
|
|
|
|
interval_ms = 1 * 1000; /* use 1 second timeout intervals */
|
|
if(timeout < interval_ms)
|
|
interval_ms = timeout;
|
|
|
|
/*
|
|
* Since this function is blocking, we need to wait here for input on the
|
|
* connection and only then we call the response reading function. We do
|
|
* timeout at least every second to make the timeout check run.
|
|
*
|
|
* A caution here is that the ftp_readresp() function has a cache that may
|
|
* contain pieces of a response from the previous invoke and we need to
|
|
* make sure we don't just wait for input while there is unhandled data in
|
|
* that cache. But also, if the cache is there, we call ftp_readresp() and
|
|
* the cache wasn't good enough to continue we must not just busy-loop
|
|
* around this function.
|
|
*
|
|
*/
|
|
|
|
if(ftpc->cache && (cache_skip < 2)) {
|
|
/*
|
|
* There's a cache left since before. We then skipping the wait for
|
|
* socket action, unless this is the same cache like the previous round
|
|
* as then the cache was deemed not enough to act on and we then need to
|
|
* wait for more data anyway.
|
|
*/
|
|
}
|
|
else {
|
|
switch (Curl_socket_ready(sockfd, CURL_SOCKET_BAD, (int)interval_ms)) {
|
|
case -1: /* select() error, stop reading */
|
|
failf(data, "FTP response aborted due to select/poll error: %d",
|
|
SOCKERRNO);
|
|
return CURLE_RECV_ERROR;
|
|
|
|
case 0: /* timeout */
|
|
if(Curl_pgrsUpdate(conn))
|
|
return CURLE_ABORTED_BY_CALLBACK;
|
|
continue; /* just continue in our loop for the timeout duration */
|
|
|
|
default: /* for clarity */
|
|
break;
|
|
}
|
|
}
|
|
result = ftp_readresp(sockfd, conn, ftpcode, &nread);
|
|
if(result)
|
|
break;
|
|
|
|
if(!nread && ftpc->cache)
|
|
/* bump cache skip counter as on repeated skips we must wait for more
|
|
data */
|
|
cache_skip++;
|
|
else
|
|
/* when we got data or there is no cache left, we reset the cache skip
|
|
counter */
|
|
cache_skip=0;
|
|
|
|
*nreadp += nread;
|
|
|
|
} /* while there's buffer left and loop is requested */
|
|
|
|
return result;
|
|
}
|
|
|
|
/* This is the ONLY way to change FTP state! */
|
|
static void state(struct connectdata *conn,
|
|
ftpstate newstate)
|
|
{
|
|
#if defined(CURLDEBUG) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
|
/* for debug purposes */
|
|
static const char * const names[]={
|
|
"STOP",
|
|
"WAIT220",
|
|
"AUTH",
|
|
"USER",
|
|
"PASS",
|
|
"ACCT",
|
|
"PBSZ",
|
|
"PROT",
|
|
"CCC",
|
|
"PWD",
|
|
"QUOTE",
|
|
"RETR_PREQUOTE",
|
|
"STOR_PREQUOTE",
|
|
"POSTQUOTE",
|
|
"CWD",
|
|
"MKD",
|
|
"MDTM",
|
|
"TYPE",
|
|
"LIST_TYPE",
|
|
"RETR_TYPE",
|
|
"STOR_TYPE",
|
|
"SIZE",
|
|
"RETR_SIZE",
|
|
"STOR_SIZE",
|
|
"REST",
|
|
"RETR_REST",
|
|
"PORT",
|
|
"PASV",
|
|
"LIST",
|
|
"RETR",
|
|
"STOR",
|
|
"QUIT"
|
|
};
|
|
#endif
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
#if defined(CURLDEBUG) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
|
if(ftpc->state != newstate)
|
|
infof(conn->data, "FTP %p state change from %s to %s\n",
|
|
ftpc, names[ftpc->state], names[newstate]);
|
|
#endif
|
|
ftpc->state = newstate;
|
|
}
|
|
|
|
static CURLcode ftp_state_user(struct connectdata *conn)
|
|
{
|
|
CURLcode result;
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
/* send USER */
|
|
NBFTPSENDF(conn, "USER %s", ftp->user?ftp->user:"");
|
|
|
|
state(conn, FTP_USER);
|
|
conn->data->state.ftp_trying_alternative = FALSE;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
static CURLcode ftp_state_pwd(struct connectdata *conn)
|
|
{
|
|
CURLcode result;
|
|
|
|
/* send PWD to discover our entry point */
|
|
NBFTPSENDF(conn, "PWD", NULL);
|
|
state(conn, FTP_PWD);
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* For the FTP "protocol connect" and "doing" phases only */
|
|
static int ftp_getsock(struct connectdata *conn,
|
|
curl_socket_t *socks,
|
|
int numsocks)
|
|
{
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if(!numsocks)
|
|
return GETSOCK_BLANK;
|
|
|
|
socks[0] = conn->sock[FIRSTSOCKET];
|
|
|
|
if(ftpc->sendleft) {
|
|
/* write mode */
|
|
return GETSOCK_WRITESOCK(0);
|
|
}
|
|
|
|
/* read mode */
|
|
return GETSOCK_READSOCK(0);
|
|
}
|
|
|
|
/* This is called after the FTP_QUOTE state is passed.
|
|
|
|
ftp_state_cwd() sends the range of PWD commands to the server to change to
|
|
the correct directory. It may also need to send MKD commands to create
|
|
missing ones, if that option is enabled.
|
|
*/
|
|
static CURLcode ftp_state_cwd(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if(ftpc->cwddone)
|
|
/* already done and fine */
|
|
result = ftp_state_post_cwd(conn);
|
|
else {
|
|
ftpc->count2 = 0;
|
|
if(conn->bits.reuse && ftpc->entrypath) {
|
|
/* This is a re-used connection. Since we change directory to where the
|
|
transfer is taking place, we must first get back to the original dir
|
|
where we ended up after login: */
|
|
ftpc->count1 = 0; /* we count this as the first path, then we add one
|
|
for all upcoming ones in the ftp->dirs[] array */
|
|
NBFTPSENDF(conn, "CWD %s", ftpc->entrypath);
|
|
state(conn, FTP_CWD);
|
|
}
|
|
else {
|
|
if(ftpc->dirdepth) {
|
|
ftpc->count1 = 1;
|
|
/* issue the first CWD, the rest is sent when the CWD responses are
|
|
received... */
|
|
NBFTPSENDF(conn, "CWD %s", ftpc->dirs[ftpc->count1 -1]);
|
|
state(conn, FTP_CWD);
|
|
}
|
|
else {
|
|
/* No CWD necessary */
|
|
result = ftp_state_post_cwd(conn);
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
typedef enum {
|
|
EPRT,
|
|
PORT,
|
|
DONE
|
|
} ftpport;
|
|
|
|
static CURLcode ftp_state_use_port(struct connectdata *conn,
|
|
ftpport fcmd) /* start with this */
|
|
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
struct SessionHandle *data=conn->data;
|
|
curl_socket_t portsock= CURL_SOCKET_BAD;
|
|
char myhost[256] = "";
|
|
|
|
#ifdef ENABLE_IPV6
|
|
/******************************************************************
|
|
* IPv6-specific section
|
|
*/
|
|
struct Curl_sockaddr_storage ss;
|
|
Curl_addrinfo *res, *ai;
|
|
socklen_t sslen;
|
|
char hbuf[NI_MAXHOST];
|
|
struct sockaddr *sa=(struct sockaddr *)&ss;
|
|
struct sockaddr_in * const sa4 = (void *)sa;
|
|
struct sockaddr_in6 * const sa6 = (void *)sa;
|
|
char tmp[1024];
|
|
static const char mode[][5] = { "EPRT", "PORT" };
|
|
int rc;
|
|
int error;
|
|
char *host=NULL;
|
|
struct Curl_dns_entry *h=NULL;
|
|
unsigned short port = 0;
|
|
|
|
/* Step 1, figure out what address that is requested */
|
|
|
|
if(data->set.str[STRING_FTPPORT] &&
|
|
(strlen(data->set.str[STRING_FTPPORT]) > 1)) {
|
|
/* attempt to get the address of the given interface name */
|
|
if(!Curl_if2ip(conn->ip_addr->ai_family, data->set.str[STRING_FTPPORT],
|
|
hbuf, sizeof(hbuf)))
|
|
/* not an interface, use the given string as host name instead */
|
|
host = data->set.str[STRING_FTPPORT];
|
|
else
|
|
host = hbuf; /* use the hbuf for host name */
|
|
} /* data->set.ftpport */
|
|
|
|
if(!host) {
|
|
/* not an interface and not a host name, get default by extracting
|
|
the IP from the control connection */
|
|
|
|
sslen = sizeof(ss);
|
|
if(getsockname(conn->sock[FIRSTSOCKET], (struct sockaddr *)&ss, &sslen)) {
|
|
failf(data, "getsockname() failed: %s",
|
|
Curl_strerror(conn, SOCKERRNO) );
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
|
|
if(sslen > (socklen_t)sizeof(ss))
|
|
sslen = sizeof(ss);
|
|
rc = getnameinfo((struct sockaddr *)&ss, sslen, hbuf, sizeof(hbuf), NULL,
|
|
0, NIFLAGS);
|
|
if(rc) {
|
|
failf(data, "getnameinfo() returned %d", rc);
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
host = hbuf; /* use this host name */
|
|
}
|
|
|
|
rc = Curl_resolv(conn, host, 0, &h);
|
|
if(rc == CURLRESOLV_PENDING)
|
|
rc = Curl_wait_for_resolv(conn, &h);
|
|
if(h) {
|
|
res = h->addr;
|
|
/* when we return from this function, we can forget about this entry
|
|
to we can unlock it now already */
|
|
Curl_resolv_unlock(data, h);
|
|
} /* (h) */
|
|
else
|
|
res = NULL; /* failure! */
|
|
|
|
|
|
/* step 2, create a socket for the requested address */
|
|
|
|
portsock = CURL_SOCKET_BAD;
|
|
error = 0;
|
|
for (ai = res; ai; ai = ai->ai_next) {
|
|
/*
|
|
* Workaround for AIX5 getaddrinfo() problem (it doesn't set ai_socktype):
|
|
*/
|
|
if(ai->ai_socktype == 0)
|
|
ai->ai_socktype = conn->socktype;
|
|
|
|
portsock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
|
|
if(portsock == CURL_SOCKET_BAD) {
|
|
error = SOCKERRNO;
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
if(!ai) {
|
|
failf(data, "socket failure: %s", Curl_strerror(conn, error));
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
|
|
/* step 3, bind to a suitable local address */
|
|
|
|
/* Try binding the given address. */
|
|
if(bind(portsock, ai->ai_addr, ai->ai_addrlen)) {
|
|
|
|
/* It failed. Bind the address used for the control connection instead */
|
|
sslen = sizeof(ss);
|
|
if(getsockname(conn->sock[FIRSTSOCKET], sa, &sslen)) {
|
|
failf(data, "getsockname() failed: %s",
|
|
Curl_strerror(conn, SOCKERRNO) );
|
|
sclose(portsock);
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
|
|
/* set port number to zero to make bind() pick "any" */
|
|
if(sa->sa_family == AF_INET)
|
|
sa4->sin_port = 0;
|
|
else
|
|
sa6->sin6_port = 0;
|
|
|
|
if(sslen > (socklen_t)sizeof(ss))
|
|
sslen = sizeof(ss);
|
|
|
|
if(bind(portsock, sa, sslen)) {
|
|
failf(data, "bind failed: %s", Curl_strerror(conn, SOCKERRNO));
|
|
sclose(portsock);
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
}
|
|
|
|
/* get the name again after the bind() so that we can extract the
|
|
port number it uses now */
|
|
sslen = sizeof(ss);
|
|
if(getsockname(portsock, (struct sockaddr *)sa, &sslen)) {
|
|
failf(data, "getsockname() failed: %s",
|
|
Curl_strerror(conn, SOCKERRNO) );
|
|
sclose(portsock);
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
|
|
/* step 4, listen on the socket */
|
|
|
|
if(listen(portsock, 1)) {
|
|
failf(data, "socket failure: %s", Curl_strerror(conn, SOCKERRNO));
|
|
sclose(portsock);
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
|
|
/* step 5, send the proper FTP command */
|
|
|
|
/* get a plain printable version of the numerical address to work with
|
|
below */
|
|
Curl_printable_address(ai, myhost, sizeof(myhost));
|
|
|
|
#ifdef PF_INET6
|
|
if(!conn->bits.ftp_use_eprt && conn->bits.ipv6)
|
|
/* EPRT is disabled but we are connected to a IPv6 host, so we ignore the
|
|
request and enable EPRT again! */
|
|
conn->bits.ftp_use_eprt = TRUE;
|
|
#endif
|
|
|
|
for (; fcmd != DONE; fcmd++) {
|
|
|
|
if(!conn->bits.ftp_use_eprt && (EPRT == fcmd))
|
|
/* if disabled, goto next */
|
|
continue;
|
|
|
|
switch (sa->sa_family) {
|
|
case AF_INET:
|
|
port = ntohs(sa4->sin_port);
|
|
break;
|
|
case AF_INET6:
|
|
port = ntohs(sa6->sin6_port);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if(EPRT == fcmd) {
|
|
/*
|
|
* Two fine examples from RFC2428;
|
|
*
|
|
* EPRT |1|132.235.1.2|6275|
|
|
*
|
|
* EPRT |2|1080::8:800:200C:417A|5282|
|
|
*/
|
|
|
|
result = Curl_nbftpsendf(conn, "%s |%d|%s|%d|", mode[fcmd],
|
|
ai->ai_family == AF_INET?1:2,
|
|
myhost, port);
|
|
if(result)
|
|
return result;
|
|
break;
|
|
}
|
|
else if(PORT == fcmd) {
|
|
char *source = myhost;
|
|
char *dest = tmp;
|
|
|
|
if((PORT == fcmd) && ai->ai_family != AF_INET)
|
|
continue;
|
|
|
|
/* translate x.x.x.x to x,x,x,x */
|
|
while(source && *source) {
|
|
if(*source == '.')
|
|
*dest=',';
|
|
else
|
|
*dest = *source;
|
|
dest++;
|
|
source++;
|
|
}
|
|
*dest = 0;
|
|
snprintf(dest, 20, ",%d,%d", port>>8, port&0xff);
|
|
|
|
result = Curl_nbftpsendf(conn, "%s %s", mode[fcmd], tmp);
|
|
if(result)
|
|
return result;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* store which command was sent */
|
|
ftpc->count1 = fcmd;
|
|
|
|
/* we set the secondary socket variable to this for now, it is only so that
|
|
the cleanup function will close it in case we fail before the true
|
|
secondary stuff is made */
|
|
if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET])
|
|
sclose(conn->sock[SECONDARYSOCKET]);
|
|
conn->sock[SECONDARYSOCKET] = portsock;
|
|
|
|
#else
|
|
/******************************************************************
|
|
* IPv4-specific section
|
|
*/
|
|
struct sockaddr_in sa;
|
|
unsigned short porttouse;
|
|
bool sa_filled_in = FALSE;
|
|
Curl_addrinfo *addr = NULL;
|
|
unsigned short ip[4];
|
|
bool freeaddr = TRUE;
|
|
socklen_t sslen = sizeof(sa);
|
|
const char *ftpportstr = data->set.str[STRING_FTPPORT];
|
|
|
|
(void)fcmd; /* not used in the IPv4 code */
|
|
if(ftpportstr) {
|
|
struct in_addr in;
|
|
|
|
/* First check if the given string is an IP address */
|
|
if(Curl_inet_pton(AF_INET, ftpportstr, &in) > 0) {
|
|
/* this is an IPv4 address */
|
|
addr = Curl_ip2addr(AF_INET, &in, ftpportstr, 0);
|
|
}
|
|
/* otherwise check if the given string is an interface */
|
|
else if(Curl_if2ip(AF_INET, ftpportstr, myhost, sizeof(myhost))) {
|
|
/* The interface to IP conversion provided a dotted address */
|
|
if(Curl_inet_pton(AF_INET, myhost, &in) > 0)
|
|
addr = Curl_ip2addr(AF_INET, &in, myhost, 0);
|
|
}
|
|
else if(strlen(ftpportstr)> 1) {
|
|
/* might be a host name! */
|
|
struct Curl_dns_entry *h=NULL;
|
|
int rc = Curl_resolv(conn, ftpportstr, 0, &h);
|
|
if(rc == CURLRESOLV_PENDING)
|
|
/* BLOCKING */
|
|
rc = Curl_wait_for_resolv(conn, &h);
|
|
if(h) {
|
|
addr = h->addr;
|
|
/* when we return from this function, we can forget about this entry
|
|
so we can unlock it now already */
|
|
Curl_resolv_unlock(data, h);
|
|
|
|
freeaddr = FALSE; /* make sure we don't free 'addr' in this function
|
|
since it points to a DNS cache entry! */
|
|
} /* (h) */
|
|
else {
|
|
infof(data, "Failed to resolve host name %s\n", ftpportstr);
|
|
}
|
|
} /* strlen */
|
|
} /* ftpportstr */
|
|
|
|
if(!addr) {
|
|
/* pick a suitable default here */
|
|
|
|
if(getsockname(conn->sock[FIRSTSOCKET],
|
|
(struct sockaddr *)&sa, &sslen)) {
|
|
failf(data, "getsockname() failed: %s",
|
|
Curl_strerror(conn, SOCKERRNO) );
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
if(sslen > (socklen_t)sizeof(sa))
|
|
sslen = sizeof(sa);
|
|
|
|
sa_filled_in = TRUE; /* the sa struct is filled in */
|
|
}
|
|
|
|
if(addr || sa_filled_in) {
|
|
portsock = socket(AF_INET, SOCK_STREAM, 0);
|
|
if(CURL_SOCKET_BAD != portsock) {
|
|
|
|
/* we set the secondary socket variable to this for now, it
|
|
is only so that the cleanup function will close it in case
|
|
we fail before the true secondary stuff is made */
|
|
if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET])
|
|
sclose(conn->sock[SECONDARYSOCKET]);
|
|
conn->sock[SECONDARYSOCKET] = portsock;
|
|
|
|
if(!sa_filled_in) {
|
|
memcpy(&sa, addr->ai_addr, sslen);
|
|
sa.sin_addr.s_addr = INADDR_ANY;
|
|
}
|
|
|
|
sa.sin_port = 0;
|
|
sslen = sizeof(sa);
|
|
|
|
if(bind(portsock, (struct sockaddr *)&sa, sslen) == 0) {
|
|
/* we succeeded to bind */
|
|
struct sockaddr_in add;
|
|
socklen_t socksize = sizeof(add);
|
|
|
|
if(getsockname(portsock, (struct sockaddr *) &add,
|
|
&socksize)) {
|
|
failf(data, "getsockname() failed: %s",
|
|
Curl_strerror(conn, SOCKERRNO) );
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
porttouse = ntohs(add.sin_port);
|
|
|
|
if( listen(portsock, 1) < 0 ) {
|
|
failf(data, "listen(2) failed on socket");
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
}
|
|
else {
|
|
failf(data, "bind(2) failed on socket");
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
}
|
|
else {
|
|
failf(data, "socket(2) failed (%s)");
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
}
|
|
else {
|
|
failf(data, "couldn't find IP address to use");
|
|
return CURLE_FTP_PORT_FAILED;
|
|
}
|
|
|
|
if(sa_filled_in)
|
|
Curl_inet_ntop(AF_INET, &((struct sockaddr_in *)&sa)->sin_addr,
|
|
myhost, sizeof(myhost));
|
|
else
|
|
Curl_printable_address(addr, myhost, sizeof(myhost));
|
|
|
|
if(4 == sscanf(myhost, "%hu.%hu.%hu.%hu",
|
|
&ip[0], &ip[1], &ip[2], &ip[3])) {
|
|
|
|
infof(data, "Telling server to connect to %d.%d.%d.%d:%d\n",
|
|
ip[0], ip[1], ip[2], ip[3], porttouse);
|
|
|
|
result=Curl_nbftpsendf(conn, "PORT %d,%d,%d,%d,%d,%d",
|
|
ip[0], ip[1], ip[2], ip[3],
|
|
porttouse >> 8, porttouse & 255);
|
|
if(result)
|
|
return result;
|
|
}
|
|
else
|
|
return CURLE_FTP_PORT_FAILED;
|
|
|
|
if(freeaddr)
|
|
Curl_freeaddrinfo(addr);
|
|
|
|
ftpc->count1 = PORT;
|
|
|
|
#endif /* end of ipv4-specific code */
|
|
|
|
/* this tcpconnect assignment below is a hackish work-around to make the
|
|
multi interface with active FTP work - as it will not wait for a
|
|
(passive) connect in Curl_is_connected().
|
|
|
|
The *proper* fix is to make sure that the active connection from the
|
|
server is done in a non-blocking way. Currently, it is still BLOCKING.
|
|
*/
|
|
conn->bits.tcpconnect = TRUE;
|
|
|
|
state(conn, FTP_PORT);
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_use_pasv(struct connectdata *conn)
|
|
{
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
CURLcode result = CURLE_OK;
|
|
/*
|
|
Here's the excecutive summary on what to do:
|
|
|
|
PASV is RFC959, expect:
|
|
227 Entering Passive Mode (a1,a2,a3,a4,p1,p2)
|
|
|
|
LPSV is RFC1639, expect:
|
|
228 Entering Long Passive Mode (4,4,a1,a2,a3,a4,2,p1,p2)
|
|
|
|
EPSV is RFC2428, expect:
|
|
229 Entering Extended Passive Mode (|||port|)
|
|
|
|
*/
|
|
|
|
static const char mode[][5] = { "EPSV", "PASV" };
|
|
int modeoff;
|
|
|
|
#ifdef PF_INET6
|
|
if(!conn->bits.ftp_use_epsv && conn->bits.ipv6)
|
|
/* EPSV is disabled but we are connected to a IPv6 host, so we ignore the
|
|
request and enable EPSV again! */
|
|
conn->bits.ftp_use_epsv = TRUE;
|
|
#endif
|
|
|
|
modeoff = conn->bits.ftp_use_epsv?0:1;
|
|
|
|
result = Curl_nbftpsendf(conn, "%s", mode[modeoff]);
|
|
if(result)
|
|
return result;
|
|
|
|
ftpc->count1 = modeoff;
|
|
state(conn, FTP_PASV);
|
|
infof(conn->data, "Connect data stream passively\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
/* REST is the last command in the chain of commands when a "head"-like
|
|
request is made. Thus, if an actual transfer is to be made this is where
|
|
we take off for real. */
|
|
static CURLcode ftp_state_post_rest(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
if(ftp->transfer != FTPTRANSFER_BODY) {
|
|
/* doesn't transfer any data */
|
|
|
|
/* still possibly do PRE QUOTE jobs */
|
|
state(conn, FTP_RETR_PREQUOTE);
|
|
result = ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
|
|
}
|
|
else if(data->set.ftp_use_port) {
|
|
/* We have chosen to use the PORT (or similar) command */
|
|
result = ftp_state_use_port(conn, EPRT);
|
|
}
|
|
else {
|
|
/* We have chosen (this is default) to use the PASV (or similar) command */
|
|
result = ftp_state_use_pasv(conn);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_post_size(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if((ftp->transfer != FTPTRANSFER_BODY) && ftpc->file) {
|
|
/* if a "head"-like request is being made (on a file) */
|
|
|
|
/* Determine if server can respond to REST command and therefore
|
|
whether it supports range */
|
|
NBFTPSENDF(conn, "REST %d", 0);
|
|
|
|
state(conn, FTP_REST);
|
|
}
|
|
else
|
|
result = ftp_state_post_rest(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_post_type(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if((ftp->transfer == FTPTRANSFER_INFO) && ftpc->file) {
|
|
/* if a "head"-like request is being made (on a file) */
|
|
|
|
/* we know ftpc->file is a valid pointer to a file name */
|
|
NBFTPSENDF(conn, "SIZE %s", ftpc->file);
|
|
|
|
state(conn, FTP_SIZE);
|
|
}
|
|
else
|
|
result = ftp_state_post_size(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_post_listtype(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
/* If this output is to be machine-parsed, the NLST command might be better
|
|
to use, since the LIST command output is not specified or standard in any
|
|
way. It has turned out that the NLST list output is not the same on all
|
|
servers either... */
|
|
|
|
/*
|
|
if FTPFILE_NOCWD was specified, we are currently in
|
|
the user's home directory, so we should add the path
|
|
as argument for the LIST / NLST / or custom command.
|
|
Whether the server will support this, is uncertain.
|
|
|
|
The other ftp_filemethods will CWD into dir/dir/ first and
|
|
then just do LIST (in that case: nothing to do here)
|
|
*/
|
|
char *cmd,*lstArg,*slashPos;
|
|
|
|
lstArg = NULL;
|
|
if((data->set.ftp_filemethod == FTPFILE_NOCWD) &&
|
|
data->state.path &&
|
|
data->state.path[0] &&
|
|
strchr(data->state.path,'/')) {
|
|
|
|
lstArg = strdup(data->state.path);
|
|
if(!lstArg)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* Check if path does not end with /, as then we cut off the file part */
|
|
if(lstArg[strlen(lstArg) - 1] != '/') {
|
|
|
|
/* chop off the file part if format is dir/dir/file */
|
|
slashPos = strrchr(lstArg,'/');
|
|
if(slashPos)
|
|
*(slashPos+1) = '\0';
|
|
}
|
|
}
|
|
|
|
cmd = aprintf( "%s%s%s",
|
|
data->set.str[STRING_CUSTOMREQUEST]?
|
|
data->set.str[STRING_CUSTOMREQUEST]:
|
|
(data->set.ftp_list_only?"NLST":"LIST"),
|
|
lstArg? " ": "",
|
|
lstArg? lstArg: "" );
|
|
|
|
if(!cmd) {
|
|
if(lstArg)
|
|
free(lstArg);
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
NBFTPSENDF(conn, "%s",cmd);
|
|
|
|
if(lstArg)
|
|
free(lstArg);
|
|
|
|
free(cmd);
|
|
|
|
state(conn, FTP_LIST);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_post_retrtype(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
/* We've sent the TYPE, now we must send the list of prequote strings */
|
|
|
|
result = ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_post_stortype(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
/* We've sent the TYPE, now we must send the list of prequote strings */
|
|
|
|
result = ftp_state_quote(conn, TRUE, FTP_STOR_PREQUOTE);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_post_mdtm(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
struct SessionHandle *data = conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
/* If we have selected NOBODY and HEADER, it means that we only want file
|
|
information. Which in FTP can't be much more than the file size and
|
|
date. */
|
|
if(data->set.opt_no_body && ftpc->file &&
|
|
ftp_need_type(conn, data->set.prefer_ascii)) {
|
|
/* The SIZE command is _not_ RFC 959 specified, and therefor many servers
|
|
may not support it! It is however the only way we have to get a file's
|
|
size! */
|
|
|
|
ftp->transfer = FTPTRANSFER_INFO;
|
|
/* this means no actual transfer will be made */
|
|
|
|
/* Some servers return different sizes for different modes, and thus we
|
|
must set the proper type before we check the size */
|
|
result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_TYPE);
|
|
if(result)
|
|
return result;
|
|
}
|
|
else
|
|
result = ftp_state_post_type(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* This is called after the CWD commands have been done in the beginning of
|
|
the DO phase */
|
|
static CURLcode ftp_state_post_cwd(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
/* Requested time of file or time-depended transfer? */
|
|
if((data->set.get_filetime || data->set.timecondition) && ftpc->file) {
|
|
|
|
/* we have requested to get the modified-time of the file, this is a white
|
|
spot as the MDTM is not mentioned in RFC959 */
|
|
NBFTPSENDF(conn, "MDTM %s", ftpc->file);
|
|
|
|
state(conn, FTP_MDTM);
|
|
}
|
|
else
|
|
result = ftp_state_post_mdtm(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* This is called after the TYPE and possible quote commands have been sent */
|
|
static CURLcode ftp_state_ul_setup(struct connectdata *conn,
|
|
bool sizechecked)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
struct SessionHandle *data = conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if((data->state.resume_from && !sizechecked) ||
|
|
((data->state.resume_from > 0) && sizechecked)) {
|
|
/* we're about to continue the uploading of a file */
|
|
/* 1. get already existing file's size. We use the SIZE command for this
|
|
which may not exist in the server! The SIZE command is not in
|
|
RFC959. */
|
|
|
|
/* 2. This used to set REST. But since we can do append, we
|
|
don't another ftp command. We just skip the source file
|
|
offset and then we APPEND the rest on the file instead */
|
|
|
|
/* 3. pass file-size number of bytes in the source file */
|
|
/* 4. lower the infilesize counter */
|
|
/* => transfer as usual */
|
|
|
|
if(data->state.resume_from < 0 ) {
|
|
/* Got no given size to start from, figure it out */
|
|
NBFTPSENDF(conn, "SIZE %s", ftpc->file);
|
|
state(conn, FTP_STOR_SIZE);
|
|
return result;
|
|
}
|
|
|
|
/* enable append */
|
|
data->set.ftp_append = TRUE;
|
|
|
|
/* Let's read off the proper amount of bytes from the input. */
|
|
if(conn->seek_func) {
|
|
curl_off_t readthisamountnow = data->state.resume_from;
|
|
|
|
if(conn->seek_func(conn->seek_client,
|
|
readthisamountnow, SEEK_SET) != 0) {
|
|
failf(data, "Could not seek stream");
|
|
return CURLE_FTP_COULDNT_USE_REST;
|
|
}
|
|
}
|
|
|
|
else {
|
|
curl_off_t passed=0;
|
|
do {
|
|
curl_off_t readthisamountnow = (data->state.resume_from - passed);
|
|
curl_off_t actuallyread;
|
|
|
|
if(readthisamountnow > BUFSIZE)
|
|
readthisamountnow = BUFSIZE;
|
|
|
|
actuallyread = (curl_off_t)
|
|
conn->fread_func(data->state.buffer, 1, (size_t)readthisamountnow,
|
|
conn->fread_in);
|
|
|
|
passed += actuallyread;
|
|
if((actuallyread <= 0) || (actuallyread > readthisamountnow)) {
|
|
/* this checks for greater-than only to make sure that the
|
|
CURL_READFUNC_ABORT return code still aborts */
|
|
failf(data, "Failed to read data");
|
|
return CURLE_FTP_COULDNT_USE_REST;
|
|
}
|
|
} while(passed < data->state.resume_from);
|
|
}
|
|
|
|
/* now, decrease the size of the read */
|
|
if(data->set.infilesize>0) {
|
|
data->set.infilesize -= data->state.resume_from;
|
|
|
|
if(data->set.infilesize <= 0) {
|
|
infof(data, "File already completely uploaded\n");
|
|
|
|
/* no data to transfer */
|
|
result=Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
|
|
|
/* Set ->transfer so that we won't get any error in
|
|
* ftp_done() because we didn't transfer anything! */
|
|
ftp->transfer = FTPTRANSFER_NONE;
|
|
|
|
state(conn, FTP_STOP);
|
|
return CURLE_OK;
|
|
}
|
|
}
|
|
/* we've passed, proceed as normal */
|
|
} /* resume_from */
|
|
|
|
NBFTPSENDF(conn, data->set.ftp_append?"APPE %s":"STOR %s",
|
|
ftpc->file);
|
|
|
|
state(conn, FTP_STOR);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_quote(struct connectdata *conn,
|
|
bool init,
|
|
ftpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
bool quote=FALSE;
|
|
struct curl_slist *item;
|
|
|
|
switch(instate) {
|
|
case FTP_QUOTE:
|
|
default:
|
|
item = data->set.quote;
|
|
break;
|
|
case FTP_RETR_PREQUOTE:
|
|
case FTP_STOR_PREQUOTE:
|
|
item = data->set.prequote;
|
|
break;
|
|
case FTP_POSTQUOTE:
|
|
item = data->set.postquote;
|
|
break;
|
|
}
|
|
|
|
if(init)
|
|
ftpc->count1 = 0;
|
|
else
|
|
ftpc->count1++;
|
|
|
|
if(item) {
|
|
int i = 0;
|
|
|
|
/* Skip count1 items in the linked list */
|
|
while((i< ftpc->count1) && item) {
|
|
item = item->next;
|
|
i++;
|
|
}
|
|
if(item) {
|
|
NBFTPSENDF(conn, "%s", item->data);
|
|
state(conn, instate);
|
|
quote = TRUE;
|
|
}
|
|
}
|
|
|
|
if(!quote) {
|
|
/* No more quote to send, continue to ... */
|
|
switch(instate) {
|
|
case FTP_QUOTE:
|
|
default:
|
|
result = ftp_state_cwd(conn);
|
|
break;
|
|
case FTP_RETR_PREQUOTE:
|
|
if(ftp->transfer != FTPTRANSFER_BODY)
|
|
state(conn, FTP_STOP);
|
|
else {
|
|
NBFTPSENDF(conn, "SIZE %s", ftpc->file);
|
|
state(conn, FTP_RETR_SIZE);
|
|
}
|
|
break;
|
|
case FTP_STOR_PREQUOTE:
|
|
result = ftp_state_ul_setup(conn, FALSE);
|
|
break;
|
|
case FTP_POSTQUOTE:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_pasv_resp(struct connectdata *conn,
|
|
int ftpcode)
|
|
{
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
CURLcode result;
|
|
struct SessionHandle *data=conn->data;
|
|
Curl_addrinfo *conninfo;
|
|
struct Curl_dns_entry *addr=NULL;
|
|
int rc;
|
|
unsigned short connectport; /* the local port connect() should use! */
|
|
unsigned short newport=0; /* remote port */
|
|
bool connected;
|
|
|
|
/* newhost must be able to hold a full IP-style address in ASCII, which
|
|
in the IPv6 case means 5*8-1 = 39 letters */
|
|
#define NEWHOST_BUFSIZE 48
|
|
char newhost[NEWHOST_BUFSIZE];
|
|
char *str=&data->state.buffer[4]; /* start on the first letter */
|
|
|
|
if((ftpc->count1 == 0) &&
|
|
(ftpcode == 229)) {
|
|
/* positive EPSV response */
|
|
char *ptr = strchr(str, '(');
|
|
if(ptr) {
|
|
unsigned int num;
|
|
char separator[4];
|
|
ptr++;
|
|
if(5 == sscanf(ptr, "%c%c%c%u%c",
|
|
&separator[0],
|
|
&separator[1],
|
|
&separator[2],
|
|
&num,
|
|
&separator[3])) {
|
|
const char sep1 = separator[0];
|
|
int i;
|
|
|
|
/* The four separators should be identical, or else this is an oddly
|
|
formatted reply and we bail out immediately. */
|
|
for(i=1; i<4; i++) {
|
|
if(separator[i] != sep1) {
|
|
ptr=NULL; /* set to NULL to signal error */
|
|
break;
|
|
}
|
|
}
|
|
if(ptr) {
|
|
newport = (unsigned short)(num & 0xffff);
|
|
|
|
if(conn->bits.tunnel_proxy ||
|
|
data->set.proxytype == CURLPROXY_SOCKS5 ||
|
|
data->set.proxytype == CURLPROXY_SOCKS5_HOSTNAME ||
|
|
data->set.proxytype == CURLPROXY_SOCKS4 ||
|
|
data->set.proxytype == CURLPROXY_SOCKS4A)
|
|
/* proxy tunnel -> use other host info because ip_addr_str is the
|
|
proxy address not the ftp host */
|
|
snprintf(newhost, sizeof(newhost), "%s", conn->host.name);
|
|
else
|
|
/* use the same IP we are already connected to */
|
|
snprintf(newhost, NEWHOST_BUFSIZE, "%s", conn->ip_addr_str);
|
|
}
|
|
}
|
|
else
|
|
ptr=NULL;
|
|
}
|
|
if(!ptr) {
|
|
failf(data, "Weirdly formatted EPSV reply");
|
|
return CURLE_FTP_WEIRD_PASV_REPLY;
|
|
}
|
|
}
|
|
else if((ftpc->count1 == 1) &&
|
|
(ftpcode == 227)) {
|
|
/* positive PASV response */
|
|
int ip[4];
|
|
int port[2];
|
|
|
|
/*
|
|
* Scan for a sequence of six comma-separated numbers and use them as
|
|
* IP+port indicators.
|
|
*
|
|
* Found reply-strings include:
|
|
* "227 Entering Passive Mode (127,0,0,1,4,51)"
|
|
* "227 Data transfer will passively listen to 127,0,0,1,4,51"
|
|
* "227 Entering passive mode. 127,0,0,1,4,51"
|
|
*/
|
|
while(*str) {
|
|
if(6 == sscanf(str, "%d,%d,%d,%d,%d,%d",
|
|
&ip[0], &ip[1], &ip[2], &ip[3],
|
|
&port[0], &port[1]))
|
|
break;
|
|
str++;
|
|
}
|
|
|
|
if(!*str) {
|
|
failf(data, "Couldn't interpret the 227-response");
|
|
return CURLE_FTP_WEIRD_227_FORMAT;
|
|
}
|
|
|
|
/* we got OK from server */
|
|
if(data->set.ftp_skip_ip) {
|
|
/* told to ignore the remotely given IP but instead use the one we used
|
|
for the control connection */
|
|
infof(data, "Skips %d.%d.%d.%d for data connection, uses %s instead\n",
|
|
ip[0], ip[1], ip[2], ip[3],
|
|
conn->ip_addr_str);
|
|
if(conn->bits.tunnel_proxy ||
|
|
data->set.proxytype == CURLPROXY_SOCKS5 ||
|
|
data->set.proxytype == CURLPROXY_SOCKS5_HOSTNAME ||
|
|
data->set.proxytype == CURLPROXY_SOCKS4 ||
|
|
data->set.proxytype == CURLPROXY_SOCKS4A)
|
|
/* proxy tunnel -> use other host info because ip_addr_str is the
|
|
proxy address not the ftp host */
|
|
snprintf(newhost, sizeof(newhost), "%s", conn->host.name);
|
|
else
|
|
snprintf(newhost, sizeof(newhost), "%s", conn->ip_addr_str);
|
|
}
|
|
else
|
|
snprintf(newhost, sizeof(newhost),
|
|
"%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
|
|
newport = (unsigned short)(((port[0]<<8) + port[1]) & 0xffff);
|
|
}
|
|
else if(ftpc->count1 == 0) {
|
|
/* EPSV failed, move on to PASV */
|
|
|
|
/* disable it for next transfer */
|
|
conn->bits.ftp_use_epsv = FALSE;
|
|
infof(data, "disabling EPSV usage\n");
|
|
|
|
NBFTPSENDF(conn, "PASV", NULL);
|
|
ftpc->count1++;
|
|
/* remain in the FTP_PASV state */
|
|
return result;
|
|
}
|
|
else {
|
|
failf(data, "Bad PASV/EPSV response: %03d", ftpcode);
|
|
return CURLE_FTP_WEIRD_PASV_REPLY;
|
|
}
|
|
|
|
if(data->set.str[STRING_PROXY] && *data->set.str[STRING_PROXY]) {
|
|
/*
|
|
* This is a tunnel through a http proxy and we need to connect to the
|
|
* proxy again here.
|
|
*
|
|
* We don't want to rely on a former host lookup that might've expired
|
|
* now, instead we remake the lookup here and now!
|
|
*/
|
|
rc = Curl_resolv(conn, conn->proxy.name, (int)conn->port, &addr);
|
|
if(rc == CURLRESOLV_PENDING)
|
|
/* BLOCKING */
|
|
rc = Curl_wait_for_resolv(conn, &addr);
|
|
|
|
connectport =
|
|
(unsigned short)conn->port; /* we connect to the proxy's port */
|
|
|
|
if(!addr) {
|
|
failf(data, "Can't resolve proxy host %s:%d",
|
|
conn->proxy.name, connectport);
|
|
return CURLE_FTP_CANT_GET_HOST;
|
|
}
|
|
}
|
|
else {
|
|
/* normal, direct, ftp connection */
|
|
rc = Curl_resolv(conn, newhost, newport, &addr);
|
|
if(rc == CURLRESOLV_PENDING)
|
|
/* BLOCKING */
|
|
rc = Curl_wait_for_resolv(conn, &addr);
|
|
|
|
connectport = newport; /* we connect to the remote port */
|
|
|
|
if(!addr) {
|
|
failf(data, "Can't resolve new host %s:%d", newhost, connectport);
|
|
return CURLE_FTP_CANT_GET_HOST;
|
|
}
|
|
}
|
|
|
|
result = Curl_connecthost(conn,
|
|
addr,
|
|
&conn->sock[SECONDARYSOCKET],
|
|
&conninfo,
|
|
&connected);
|
|
|
|
Curl_resolv_unlock(data, addr); /* we're done using this address */
|
|
|
|
if(result && ftpc->count1 == 0 && ftpcode == 229) {
|
|
infof(data, "got positive EPSV response, but can't connect. "
|
|
"Disabling EPSV\n");
|
|
/* disable it for next transfer */
|
|
conn->bits.ftp_use_epsv = FALSE;
|
|
data->state.errorbuf = FALSE; /* allow error message to get rewritten */
|
|
NBFTPSENDF(conn, "PASV", NULL);
|
|
ftpc->count1++;
|
|
/* remain in the FTP_PASV state */
|
|
return result;
|
|
}
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
conn->bits.tcpconnect = connected; /* simply TRUE or FALSE */
|
|
|
|
/*
|
|
* When this is used from the multi interface, this might've returned with
|
|
* the 'connected' set to FALSE and thus we are now awaiting a non-blocking
|
|
* connect to connect and we should not be "hanging" here waiting.
|
|
*/
|
|
|
|
if(data->set.verbose)
|
|
/* this just dumps information about this second connection */
|
|
ftp_pasv_verbose(conn, conninfo, newhost, connectport);
|
|
|
|
switch(data->set.proxytype) {
|
|
#ifndef CURL_DISABLE_PROXY
|
|
case CURLPROXY_SOCKS5:
|
|
case CURLPROXY_SOCKS5_HOSTNAME:
|
|
result = Curl_SOCKS5(conn->proxyuser, conn->proxypasswd, newhost, newport,
|
|
SECONDARYSOCKET, conn);
|
|
break;
|
|
case CURLPROXY_SOCKS4:
|
|
result = Curl_SOCKS4(conn->proxyuser, newhost, newport,
|
|
SECONDARYSOCKET, conn, FALSE);
|
|
break;
|
|
case CURLPROXY_SOCKS4A:
|
|
result = Curl_SOCKS4(conn->proxyuser, newhost, newport,
|
|
SECONDARYSOCKET, conn, TRUE);
|
|
break;
|
|
#endif /* CURL_DISABLE_PROXY */
|
|
case CURLPROXY_HTTP:
|
|
/* do nothing here. handled later. */
|
|
break;
|
|
default:
|
|
failf(data, "unknown proxytype option given");
|
|
result = CURLE_COULDNT_CONNECT;
|
|
break;
|
|
}
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
|
|
/* FIX: this MUST wait for a proper connect first if 'connected' is
|
|
* FALSE */
|
|
|
|
/* BLOCKING */
|
|
/* We want "seamless" FTP operations through HTTP proxy tunnel */
|
|
|
|
/* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the member
|
|
* conn->proto.http; we want FTP through HTTP and we have to change the
|
|
* member temporarily for connecting to the HTTP proxy. After
|
|
* Curl_proxyCONNECT we have to set back the member to the original struct
|
|
* FTP pointer
|
|
*/
|
|
struct HTTP http_proxy;
|
|
struct FTP *ftp_save = data->state.proto.ftp;
|
|
memset(&http_proxy, 0, sizeof(http_proxy));
|
|
data->state.proto.http = &http_proxy;
|
|
|
|
result = Curl_proxyCONNECT(conn, SECONDARYSOCKET, newhost, newport);
|
|
|
|
data->state.proto.ftp = ftp_save;
|
|
|
|
if(CURLE_OK != result)
|
|
return result;
|
|
}
|
|
#endif /* CURL_DISABLE_HTTP */
|
|
|
|
state(conn, FTP_STOP); /* this phase is completed */
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_port_resp(struct connectdata *conn,
|
|
int ftpcode)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
ftpport fcmd = (ftpport)ftpc->count1;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
if(ftpcode != 200) {
|
|
/* the command failed */
|
|
|
|
if(EPRT == fcmd) {
|
|
infof(data, "disabling EPRT usage\n");
|
|
conn->bits.ftp_use_eprt = FALSE;
|
|
}
|
|
fcmd++;
|
|
|
|
if(fcmd == DONE) {
|
|
failf(data, "Failed to do PORT");
|
|
result = CURLE_FTP_PORT_FAILED;
|
|
}
|
|
else
|
|
/* try next */
|
|
result = ftp_state_use_port(conn, fcmd);
|
|
}
|
|
else {
|
|
infof(data, "Connect data stream actively\n");
|
|
state(conn, FTP_STOP); /* end of DO phase */
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_mdtm_resp(struct connectdata *conn,
|
|
int ftpcode)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data=conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
switch(ftpcode) {
|
|
case 213:
|
|
{
|
|
/* we got a time. Format should be: "YYYYMMDDHHMMSS[.sss]" where the
|
|
last .sss part is optional and means fractions of a second */
|
|
int year, month, day, hour, minute, second;
|
|
char *buf = data->state.buffer;
|
|
if(6 == sscanf(buf+4, "%04d%02d%02d%02d%02d%02d",
|
|
&year, &month, &day, &hour, &minute, &second)) {
|
|
/* we have a time, reformat it */
|
|
time_t secs=time(NULL);
|
|
/* using the good old yacc/bison yuck */
|
|
snprintf(buf, sizeof(conn->data->state.buffer),
|
|
"%04d%02d%02d %02d:%02d:%02d GMT",
|
|
year, month, day, hour, minute, second);
|
|
/* now, convert this into a time() value: */
|
|
data->info.filetime = (long)curl_getdate(buf, &secs);
|
|
}
|
|
|
|
#ifdef CURL_FTP_HTTPSTYLE_HEAD
|
|
/* If we asked for a time of the file and we actually got one as well,
|
|
we "emulate" a HTTP-style header in our output. */
|
|
|
|
if(data->set.opt_no_body &&
|
|
ftpc->file &&
|
|
data->set.get_filetime &&
|
|
(data->info.filetime>=0) ) {
|
|
struct tm *tm;
|
|
time_t filetime = (time_t)data->info.filetime;
|
|
#ifdef HAVE_GMTIME_R
|
|
struct tm buffer;
|
|
tm = (struct tm *)gmtime_r(&filetime, &buffer);
|
|
#else
|
|
tm = gmtime(&filetime);
|
|
#endif
|
|
/* format: "Tue, 15 Nov 1994 12:45:26" */
|
|
snprintf(buf, BUFSIZE-1,
|
|
"Last-Modified: %s, %02d %s %4d %02d:%02d:%02d GMT\r\n",
|
|
Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
|
|
tm->tm_mday,
|
|
Curl_month[tm->tm_mon],
|
|
tm->tm_year + 1900,
|
|
tm->tm_hour,
|
|
tm->tm_min,
|
|
tm->tm_sec);
|
|
result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
|
|
if(result)
|
|
return result;
|
|
} /* end of a ridiculous amount of conditionals */
|
|
#endif
|
|
}
|
|
break;
|
|
default:
|
|
infof(data, "unsupported MDTM reply format\n");
|
|
break;
|
|
case 550: /* "No such file or directory" */
|
|
failf(data, "Given file does not exist");
|
|
result = CURLE_FTP_COULDNT_RETR_FILE;
|
|
break;
|
|
}
|
|
|
|
if(data->set.timecondition) {
|
|
if((data->info.filetime > 0) && (data->set.timevalue > 0)) {
|
|
switch(data->set.timecondition) {
|
|
case CURL_TIMECOND_IFMODSINCE:
|
|
default:
|
|
if(data->info.filetime <= data->set.timevalue) {
|
|
infof(data, "The requested document is not new enough\n");
|
|
ftp->transfer = FTPTRANSFER_NONE; /* mark this to not transfer data */
|
|
state(conn, FTP_STOP);
|
|
return CURLE_OK;
|
|
}
|
|
break;
|
|
case CURL_TIMECOND_IFUNMODSINCE:
|
|
if(data->info.filetime > data->set.timevalue) {
|
|
infof(data, "The requested document is not old enough\n");
|
|
ftp->transfer = FTPTRANSFER_NONE; /* mark this to not transfer data */
|
|
state(conn, FTP_STOP);
|
|
return CURLE_OK;
|
|
}
|
|
break;
|
|
} /* switch */
|
|
}
|
|
else {
|
|
infof(data, "Skipping time comparison\n");
|
|
}
|
|
}
|
|
|
|
if(!result)
|
|
result = ftp_state_post_mdtm(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_type_resp(struct connectdata *conn,
|
|
int ftpcode,
|
|
ftpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data=conn->data;
|
|
|
|
if(ftpcode/100 != 2) {
|
|
/* "sasserftpd" and "(u)r(x)bot ftpd" both responds with 226 after a
|
|
successful 'TYPE I'. While that is not as RFC959 says, it is still a
|
|
positive response code and we allow that. */
|
|
failf(data, "Couldn't set desired mode");
|
|
return CURLE_FTP_COULDNT_SET_TYPE;
|
|
}
|
|
if(ftpcode != 200)
|
|
infof(data, "Got a %03d response code instead of the assumed 200\n",
|
|
ftpcode);
|
|
|
|
if(instate == FTP_TYPE)
|
|
result = ftp_state_post_type(conn);
|
|
else if(instate == FTP_LIST_TYPE)
|
|
result = ftp_state_post_listtype(conn);
|
|
else if(instate == FTP_RETR_TYPE)
|
|
result = ftp_state_post_retrtype(conn);
|
|
else if(instate == FTP_STOR_TYPE)
|
|
result = ftp_state_post_stortype(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_post_retr_size(struct connectdata *conn,
|
|
curl_off_t filesize)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data=conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if(data->set.max_filesize && (filesize > data->set.max_filesize)) {
|
|
failf(data, "Maximum file size exceeded");
|
|
return CURLE_FILESIZE_EXCEEDED;
|
|
}
|
|
ftp->downloadsize = filesize;
|
|
|
|
if(data->state.resume_from) {
|
|
/* We always (attempt to) get the size of downloads, so it is done before
|
|
this even when not doing resumes. */
|
|
if(filesize == -1) {
|
|
infof(data, "ftp server doesn't support SIZE\n");
|
|
/* We couldn't get the size and therefore we can't know if there really
|
|
is a part of the file left to get, although the server will just
|
|
close the connection when we start the connection so it won't cause
|
|
us any harm, just not make us exit as nicely. */
|
|
}
|
|
else {
|
|
/* We got a file size report, so we check that there actually is a
|
|
part of the file left to get, or else we go home. */
|
|
if(data->state.resume_from< 0) {
|
|
/* We're supposed to download the last abs(from) bytes */
|
|
if(filesize < -data->state.resume_from) {
|
|
failf(data, "Offset (%" FORMAT_OFF_T
|
|
") was beyond file size (%" FORMAT_OFF_T ")",
|
|
data->state.resume_from, filesize);
|
|
return CURLE_BAD_DOWNLOAD_RESUME;
|
|
}
|
|
/* convert to size to download */
|
|
ftp->downloadsize = -data->state.resume_from;
|
|
/* download from where? */
|
|
data->state.resume_from = filesize - ftp->downloadsize;
|
|
}
|
|
else {
|
|
if(filesize < data->state.resume_from) {
|
|
failf(data, "Offset (%" FORMAT_OFF_T
|
|
") was beyond file size (%" FORMAT_OFF_T ")",
|
|
data->state.resume_from, filesize);
|
|
return CURLE_BAD_DOWNLOAD_RESUME;
|
|
}
|
|
/* Now store the number of bytes we are expected to download */
|
|
ftp->downloadsize = filesize-data->state.resume_from;
|
|
}
|
|
}
|
|
|
|
if(ftp->downloadsize == 0) {
|
|
/* no data to transfer */
|
|
result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
|
infof(data, "File already completely downloaded\n");
|
|
|
|
/* Set ->transfer so that we won't get any error in ftp_done()
|
|
* because we didn't transfer the any file */
|
|
ftp->transfer = FTPTRANSFER_NONE;
|
|
state(conn, FTP_STOP);
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* Set resume file transfer offset */
|
|
infof(data, "Instructs server to resume from offset %" FORMAT_OFF_T
|
|
"\n", data->state.resume_from);
|
|
|
|
NBFTPSENDF(conn, "REST %" FORMAT_OFF_T, data->state.resume_from);
|
|
|
|
state(conn, FTP_RETR_REST);
|
|
|
|
}
|
|
else {
|
|
/* no resume */
|
|
NBFTPSENDF(conn, "RETR %s", ftpc->file);
|
|
state(conn, FTP_RETR);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_size_resp(struct connectdata *conn,
|
|
int ftpcode,
|
|
ftpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data=conn->data;
|
|
curl_off_t filesize;
|
|
char *buf = data->state.buffer;
|
|
|
|
if((instate != FTP_STOR_SIZE) && (ftpcode == 550))
|
|
/* the file doesn't exist and we're not about to upload */
|
|
return CURLE_REMOTE_FILE_NOT_FOUND;
|
|
|
|
/* get the size from the ascii string: */
|
|
filesize = (ftpcode == 213)?curlx_strtoofft(buf+4, NULL, 0):-1;
|
|
|
|
if(instate == FTP_SIZE) {
|
|
#ifdef CURL_FTP_HTTPSTYLE_HEAD
|
|
if(-1 != filesize) {
|
|
snprintf(buf, sizeof(data->state.buffer),
|
|
"Content-Length: %" FORMAT_OFF_T "\r\n", filesize);
|
|
result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
|
|
if(result)
|
|
return result;
|
|
}
|
|
#endif
|
|
Curl_pgrsSetDownloadSize(data, filesize);
|
|
result = ftp_state_post_size(conn);
|
|
}
|
|
else if(instate == FTP_RETR_SIZE) {
|
|
Curl_pgrsSetDownloadSize(data, filesize);
|
|
result = ftp_state_post_retr_size(conn, filesize);
|
|
}
|
|
else if(instate == FTP_STOR_SIZE) {
|
|
data->state.resume_from = filesize;
|
|
result = ftp_state_ul_setup(conn, TRUE);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_rest_resp(struct connectdata *conn,
|
|
int ftpcode,
|
|
ftpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
switch(instate) {
|
|
case FTP_REST:
|
|
default:
|
|
#ifdef CURL_FTP_HTTPSTYLE_HEAD
|
|
if(ftpcode == 350) {
|
|
char buffer[24]= { "Accept-ranges: bytes\r\n" };
|
|
result = Curl_client_write(conn, CLIENTWRITE_BOTH, buffer, 0);
|
|
if(result)
|
|
return result;
|
|
}
|
|
#endif
|
|
result = ftp_state_post_rest(conn);
|
|
break;
|
|
|
|
case FTP_RETR_REST:
|
|
if(ftpcode != 350) {
|
|
failf(conn->data, "Couldn't use REST");
|
|
result = CURLE_FTP_COULDNT_USE_REST;
|
|
}
|
|
else {
|
|
NBFTPSENDF(conn, "RETR %s", ftpc->file);
|
|
state(conn, FTP_RETR);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_state_stor_resp(struct connectdata *conn,
|
|
int ftpcode)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
|
|
if(ftpcode>=400) {
|
|
failf(data, "Failed FTP upload: %0d", ftpcode);
|
|
/* oops, we never close the sockets! */
|
|
return CURLE_UPLOAD_FAILED;
|
|
}
|
|
|
|
if(data->set.ftp_use_port) {
|
|
/* BLOCKING */
|
|
/* PORT means we are now awaiting the server to connect to us. */
|
|
result = AllowServerConnect(conn);
|
|
if( result )
|
|
return result;
|
|
}
|
|
|
|
if(conn->ssl[SECONDARYSOCKET].use) {
|
|
/* since we only have a plaintext TCP connection here, we must now
|
|
do the TLS stuff */
|
|
infof(data, "Doing the SSL/TLS handshake on the data stream\n");
|
|
/* BLOCKING */
|
|
result = Curl_ssl_connect(conn, SECONDARYSOCKET);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
*(ftp->bytecountp)=0;
|
|
|
|
/* When we know we're uploading a specified file, we can get the file
|
|
size prior to the actual upload. */
|
|
|
|
Curl_pgrsSetUploadSize(data, data->set.infilesize);
|
|
|
|
result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, /* no download */
|
|
SECONDARYSOCKET, ftp->bytecountp);
|
|
state(conn, FTP_STOP);
|
|
|
|
return result;
|
|
}
|
|
|
|
/* for LIST and RETR responses */
|
|
static CURLcode ftp_state_get_resp(struct connectdata *conn,
|
|
int ftpcode,
|
|
ftpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
char *buf = data->state.buffer;
|
|
|
|
if((ftpcode == 150) || (ftpcode == 125)) {
|
|
|
|
/*
|
|
A;
|
|
150 Opening BINARY mode data connection for /etc/passwd (2241
|
|
bytes). (ok, the file is being transfered)
|
|
|
|
B:
|
|
150 Opening ASCII mode data connection for /bin/ls
|
|
|
|
C:
|
|
150 ASCII data connection for /bin/ls (137.167.104.91,37445) (0 bytes).
|
|
|
|
D:
|
|
150 Opening ASCII mode data connection for /linux/fisk/kpanelrc (0.0.0.0,0) (545 bytes).
|
|
|
|
E:
|
|
125 Data connection already open; Transfer starting. */
|
|
|
|
curl_off_t size=-1; /* default unknown size */
|
|
|
|
|
|
/*
|
|
* It appears that there are FTP-servers that return size 0 for files when
|
|
* SIZE is used on the file while being in BINARY mode. To work around
|
|
* that (stupid) behavior, we attempt to parse the RETR response even if
|
|
* the SIZE returned size zero.
|
|
*
|
|
* Debugging help from Salvatore Sorrentino on February 26, 2003.
|
|
*/
|
|
|
|
if((instate != FTP_LIST) &&
|
|
!data->set.prefer_ascii &&
|
|
(ftp->downloadsize < 1)) {
|
|
/*
|
|
* It seems directory listings either don't show the size or very
|
|
* often uses size 0 anyway. ASCII transfers may very well turn out
|
|
* that the transfered amount of data is not the same as this line
|
|
* tells, why using this number in those cases only confuses us.
|
|
*
|
|
* Example D above makes this parsing a little tricky */
|
|
char *bytes;
|
|
bytes=strstr(buf, " bytes");
|
|
if(bytes--) {
|
|
long in=(long)(bytes-buf);
|
|
/* this is a hint there is size information in there! ;-) */
|
|
while(--in) {
|
|
/* scan for the left parenthesis and break there */
|
|
if('(' == *bytes)
|
|
break;
|
|
/* skip only digits */
|
|
if(!ISDIGIT(*bytes)) {
|
|
bytes=NULL;
|
|
break;
|
|
}
|
|
/* one more estep backwards */
|
|
bytes--;
|
|
}
|
|
/* if we have nothing but digits: */
|
|
if(bytes++) {
|
|
/* get the number! */
|
|
size = curlx_strtoofft(bytes, NULL, 0);
|
|
}
|
|
}
|
|
}
|
|
else if(ftp->downloadsize > -1)
|
|
size = ftp->downloadsize;
|
|
|
|
if(data->set.ftp_use_port) {
|
|
/* BLOCKING */
|
|
result = AllowServerConnect(conn);
|
|
if( result )
|
|
return result;
|
|
}
|
|
|
|
if(conn->ssl[SECONDARYSOCKET].use) {
|
|
/* since we only have a plaintext TCP connection here, we must now
|
|
do the TLS stuff */
|
|
infof(data, "Doing the SSL/TLS handshake on the data stream\n");
|
|
result = Curl_ssl_connect(conn, SECONDARYSOCKET);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
if(size > data->req.maxdownload && data->req.maxdownload > 0)
|
|
size = data->req.size = data->req.maxdownload;
|
|
|
|
infof(data, "Maxdownload = %" FORMAT_OFF_T "\n", data->req.maxdownload);
|
|
|
|
if(instate != FTP_LIST)
|
|
infof(data, "Getting file with size: %" FORMAT_OFF_T "\n", size);
|
|
|
|
/* FTP download: */
|
|
result=Curl_setup_transfer(conn, SECONDARYSOCKET, size, FALSE,
|
|
ftp->bytecountp,
|
|
-1, NULL); /* no upload here */
|
|
if(result)
|
|
return result;
|
|
|
|
state(conn, FTP_STOP);
|
|
}
|
|
else {
|
|
if((instate == FTP_LIST) && (ftpcode == 450)) {
|
|
/* simply no matching files in the dir listing */
|
|
ftp->transfer = FTPTRANSFER_NONE; /* don't download anything */
|
|
state(conn, FTP_STOP); /* this phase is over */
|
|
}
|
|
else {
|
|
failf(data, "RETR response: %03d", ftpcode);
|
|
return CURLE_FTP_COULDNT_RETR_FILE;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* after USER, PASS and ACCT */
|
|
static CURLcode ftp_state_loggedin(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
#ifdef HAVE_KRB4
|
|
if(conn->data->set.krb) {
|
|
/* We may need to issue a KAUTH here to have access to the files
|
|
* do it if user supplied a password
|
|
*/
|
|
if(conn->passwd && *conn->passwd) {
|
|
/* BLOCKING */
|
|
result = Curl_krb_kauth(conn);
|
|
if(result)
|
|
return result;
|
|
}
|
|
}
|
|
#endif
|
|
if(conn->ssl[FIRSTSOCKET].use) {
|
|
/* PBSZ = PROTECTION BUFFER SIZE.
|
|
|
|
The 'draft-murray-auth-ftp-ssl' (draft 12, page 7) says:
|
|
|
|
Specifically, the PROT command MUST be preceded by a PBSZ
|
|
command and a PBSZ command MUST be preceded by a successful
|
|
security data exchange (the TLS negotiation in this case)
|
|
|
|
... (and on page 8):
|
|
|
|
Thus the PBSZ command must still be issued, but must have a
|
|
parameter of '0' to indicate that no buffering is taking place
|
|
and the data connection should not be encapsulated.
|
|
*/
|
|
NBFTPSENDF(conn, "PBSZ %d", 0);
|
|
state(conn, FTP_PBSZ);
|
|
}
|
|
else {
|
|
result = ftp_state_pwd(conn);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* for USER and PASS responses */
|
|
static CURLcode ftp_state_user_resp(struct connectdata *conn,
|
|
int ftpcode,
|
|
ftpstate instate)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
(void)instate; /* no use for this yet */
|
|
|
|
/* some need password anyway, and others just return 2xx ignored */
|
|
if((ftpcode == 331) && (ftpc->state == FTP_USER)) {
|
|
/* 331 Password required for ...
|
|
(the server requires to send the user's password too) */
|
|
NBFTPSENDF(conn, "PASS %s", ftp->passwd?ftp->passwd:"");
|
|
state(conn, FTP_PASS);
|
|
}
|
|
else if(ftpcode/100 == 2) {
|
|
/* 230 User ... logged in.
|
|
(the user logged in with or without password) */
|
|
result = ftp_state_loggedin(conn);
|
|
}
|
|
else if(ftpcode == 332) {
|
|
if(data->set.str[STRING_FTP_ACCOUNT]) {
|
|
NBFTPSENDF(conn, "ACCT %s", data->set.str[STRING_FTP_ACCOUNT]);
|
|
state(conn, FTP_ACCT);
|
|
}
|
|
else {
|
|
failf(data, "ACCT requested but none available");
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
}
|
|
else {
|
|
/* All other response codes, like:
|
|
|
|
530 User ... access denied
|
|
(the server denies to log the specified user) */
|
|
|
|
if(conn->data->set.str[STRING_FTP_ALTERNATIVE_TO_USER] &&
|
|
!conn->data->state.ftp_trying_alternative) {
|
|
/* Ok, USER failed. Let's try the supplied command. */
|
|
NBFTPSENDF(conn, "%s",
|
|
conn->data->set.str[STRING_FTP_ALTERNATIVE_TO_USER]);
|
|
conn->data->state.ftp_trying_alternative = TRUE;
|
|
state(conn, FTP_USER);
|
|
result = CURLE_OK;
|
|
}
|
|
else {
|
|
failf(data, "Access denied: %03d", ftpcode);
|
|
result = CURLE_LOGIN_DENIED;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/* for ACCT response */
|
|
static CURLcode ftp_state_acct_resp(struct connectdata *conn,
|
|
int ftpcode)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
if(ftpcode != 230) {
|
|
failf(data, "ACCT rejected by server: %03d", ftpcode);
|
|
result = CURLE_FTP_WEIRD_PASS_REPLY; /* FIX */
|
|
}
|
|
else
|
|
result = ftp_state_loggedin(conn);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
static CURLcode ftp_statemach_act(struct connectdata *conn)
|
|
{
|
|
CURLcode result;
|
|
curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
|
struct SessionHandle *data=conn->data;
|
|
int ftpcode;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
static const char ftpauth[][4] = { "SSL", "TLS" };
|
|
size_t nread = 0;
|
|
|
|
if(ftpc->sendleft) {
|
|
/* we have a piece of a command still left to send */
|
|
ssize_t written;
|
|
result = Curl_write(conn, sock, ftpc->sendthis + ftpc->sendsize -
|
|
ftpc->sendleft, ftpc->sendleft, &written);
|
|
if(result)
|
|
return result;
|
|
|
|
if(written != (ssize_t)ftpc->sendleft) {
|
|
/* only a fraction was sent */
|
|
ftpc->sendleft -= written;
|
|
}
|
|
else {
|
|
free(ftpc->sendthis);
|
|
ftpc->sendthis=NULL;
|
|
ftpc->sendleft = ftpc->sendsize = 0;
|
|
ftpc->response = Curl_tvnow();
|
|
}
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* we read a piece of response */
|
|
result = ftp_readresp(sock, conn, &ftpcode, &nread);
|
|
if(result)
|
|
return result;
|
|
|
|
if(ftpcode) {
|
|
/* we have now received a full FTP server response */
|
|
switch(ftpc->state) {
|
|
case FTP_WAIT220:
|
|
if(ftpcode != 220) {
|
|
failf(data, "Got a %03d ftp-server response when 220 was expected",
|
|
ftpcode);
|
|
return CURLE_FTP_WEIRD_SERVER_REPLY;
|
|
}
|
|
|
|
/* We have received a 220 response fine, now we proceed. */
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
if(data->set.krb) {
|
|
/* If not anonymous login, try a secure login. Note that this
|
|
procedure is still BLOCKING. */
|
|
|
|
Curl_sec_request_prot(conn, "private");
|
|
/* We set private first as default, in case the line below fails to
|
|
set a valid level */
|
|
Curl_sec_request_prot(conn, data->set.str[STRING_KRB_LEVEL]);
|
|
|
|
if(Curl_sec_login(conn) != 0)
|
|
infof(data, "Logging in with password in cleartext!\n");
|
|
else
|
|
infof(data, "Authentication successful\n");
|
|
}
|
|
#endif
|
|
|
|
if(data->set.ftp_ssl && !conn->ssl[FIRSTSOCKET].use) {
|
|
/* We don't have a SSL/TLS connection yet, but FTPS is
|
|
requested. Try a FTPS connection now */
|
|
|
|
ftpc->count3=0;
|
|
switch(data->set.ftpsslauth) {
|
|
case CURLFTPAUTH_DEFAULT:
|
|
case CURLFTPAUTH_SSL:
|
|
ftpc->count2 = 1; /* add one to get next */
|
|
ftpc->count1 = 0;
|
|
break;
|
|
case CURLFTPAUTH_TLS:
|
|
ftpc->count2 = -1; /* subtract one to get next */
|
|
ftpc->count1 = 1;
|
|
break;
|
|
default:
|
|
failf(data, "unsupported parameter to CURLOPT_FTPSSLAUTH: %d",
|
|
data->set.ftpsslauth);
|
|
return CURLE_FAILED_INIT; /* we don't know what to do */
|
|
}
|
|
NBFTPSENDF(conn, "AUTH %s", ftpauth[ftpc->count1]);
|
|
state(conn, FTP_AUTH);
|
|
}
|
|
else {
|
|
result = ftp_state_user(conn);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
break;
|
|
|
|
case FTP_AUTH:
|
|
/* we have gotten the response to a previous AUTH command */
|
|
|
|
/* RFC2228 (page 5) says:
|
|
*
|
|
* If the server is willing to accept the named security mechanism,
|
|
* and does not require any security data, it must respond with
|
|
* reply code 234/334.
|
|
*/
|
|
|
|
if((ftpcode == 234) || (ftpcode == 334)) {
|
|
/* Curl_ssl_connect is BLOCKING */
|
|
result = Curl_ssl_connect(conn, FIRSTSOCKET);
|
|
if(CURLE_OK == result) {
|
|
conn->protocol |= PROT_FTPS;
|
|
conn->ssl[SECONDARYSOCKET].use = FALSE; /* clear-text data */
|
|
result = ftp_state_user(conn);
|
|
}
|
|
}
|
|
else if(ftpc->count3 < 1) {
|
|
ftpc->count3++;
|
|
ftpc->count1 += ftpc->count2; /* get next attempt */
|
|
result = Curl_nbftpsendf(conn, "AUTH %s", ftpauth[ftpc->count1]);
|
|
/* remain in this same state */
|
|
}
|
|
else {
|
|
if(data->set.ftp_ssl > CURLUSESSL_TRY)
|
|
/* we failed and CURLUSESSL_CONTROL or CURLUSESSL_ALL is set */
|
|
result = CURLE_USE_SSL_FAILED;
|
|
else
|
|
/* ignore the failure and continue */
|
|
result = ftp_state_user(conn);
|
|
}
|
|
|
|
if(result)
|
|
return result;
|
|
break;
|
|
|
|
case FTP_USER:
|
|
case FTP_PASS:
|
|
result = ftp_state_user_resp(conn, ftpcode, ftpc->state);
|
|
break;
|
|
|
|
case FTP_ACCT:
|
|
result = ftp_state_acct_resp(conn, ftpcode);
|
|
break;
|
|
|
|
case FTP_PBSZ:
|
|
/* FIX: check response code */
|
|
|
|
/* For TLS, the data connection can have one of two security levels.
|
|
|
|
1) Clear (requested by 'PROT C')
|
|
|
|
2)Private (requested by 'PROT P')
|
|
*/
|
|
if(!conn->ssl[SECONDARYSOCKET].use) {
|
|
NBFTPSENDF(conn, "PROT %c",
|
|
data->set.ftp_ssl == CURLUSESSL_CONTROL ? 'C' : 'P');
|
|
state(conn, FTP_PROT);
|
|
}
|
|
else {
|
|
result = ftp_state_pwd(conn);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
break;
|
|
|
|
case FTP_PROT:
|
|
if(ftpcode/100 == 2)
|
|
/* We have enabled SSL for the data connection! */
|
|
conn->ssl[SECONDARYSOCKET].use =
|
|
(bool)(data->set.ftp_ssl != CURLUSESSL_CONTROL);
|
|
/* FTP servers typically responds with 500 if they decide to reject
|
|
our 'P' request */
|
|
else if(data->set.ftp_ssl > CURLUSESSL_CONTROL)
|
|
/* we failed and bails out */
|
|
return CURLE_USE_SSL_FAILED;
|
|
|
|
if(data->set.ftp_ccc) {
|
|
/* CCC - Clear Command Channel
|
|
*/
|
|
NBFTPSENDF(conn, "CCC", NULL);
|
|
state(conn, FTP_CCC);
|
|
}
|
|
else {
|
|
result = ftp_state_pwd(conn);
|
|
if(result)
|
|
return result;
|
|
}
|
|
break;
|
|
|
|
case FTP_CCC:
|
|
if(ftpcode < 500) {
|
|
/* First shut down the SSL layer (note: this call will block) */
|
|
result = Curl_ssl_shutdown(conn, FIRSTSOCKET);
|
|
|
|
if(result) {
|
|
failf(conn->data, "Failed to clear the command channel (CCC)");
|
|
return result;
|
|
}
|
|
}
|
|
|
|
/* Then continue as normal */
|
|
result = ftp_state_pwd(conn);
|
|
if(result)
|
|
return result;
|
|
break;
|
|
|
|
case FTP_PWD:
|
|
if(ftpcode == 257) {
|
|
char *dir = malloc(nread+1);
|
|
char *store=dir;
|
|
char *ptr=&data->state.buffer[4]; /* start on the first letter */
|
|
|
|
if(!dir)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* Reply format is like
|
|
257<space>"<directory-name>"<space><commentary> and the RFC959
|
|
says
|
|
|
|
The directory name can contain any character; embedded
|
|
double-quotes should be escaped by double-quotes (the
|
|
"quote-doubling" convention).
|
|
*/
|
|
if('\"' == *ptr) {
|
|
/* it started good */
|
|
ptr++;
|
|
while(ptr && *ptr) {
|
|
if('\"' == *ptr) {
|
|
if('\"' == ptr[1]) {
|
|
/* "quote-doubling" */
|
|
*store = ptr[1];
|
|
ptr++;
|
|
}
|
|
else {
|
|
/* end of path */
|
|
*store = '\0'; /* zero terminate */
|
|
break; /* get out of this loop */
|
|
}
|
|
}
|
|
else
|
|
*store = *ptr;
|
|
store++;
|
|
ptr++;
|
|
}
|
|
ftpc->entrypath =dir; /* remember this */
|
|
infof(data, "Entry path is '%s'\n", ftpc->entrypath);
|
|
/* also save it where getinfo can access it: */
|
|
data->state.most_recent_ftp_entrypath = ftpc->entrypath;
|
|
}
|
|
else {
|
|
/* couldn't get the path */
|
|
free(dir);
|
|
infof(data, "Failed to figure out path\n");
|
|
}
|
|
}
|
|
state(conn, FTP_STOP); /* we are done with the CONNECT phase! */
|
|
DEBUGF(infof(data, "protocol connect phase DONE\n"));
|
|
break;
|
|
|
|
case FTP_QUOTE:
|
|
case FTP_POSTQUOTE:
|
|
case FTP_RETR_PREQUOTE:
|
|
case FTP_STOR_PREQUOTE:
|
|
if(ftpcode >= 400) {
|
|
failf(conn->data, "QUOT command failed with %03d", ftpcode);
|
|
return CURLE_QUOTE_ERROR;
|
|
}
|
|
result = ftp_state_quote(conn, FALSE, ftpc->state);
|
|
if(result)
|
|
return result;
|
|
|
|
break;
|
|
|
|
case FTP_CWD:
|
|
if(ftpcode/100 != 2) {
|
|
/* failure to CWD there */
|
|
if(conn->data->set.ftp_create_missing_dirs &&
|
|
ftpc->count1 && !ftpc->count2) {
|
|
/* try making it */
|
|
ftpc->count2++; /* counter to prevent CWD-MKD loops */
|
|
NBFTPSENDF(conn, "MKD %s", ftpc->dirs[ftpc->count1 - 1]);
|
|
state(conn, FTP_MKD);
|
|
}
|
|
else {
|
|
/* return failure */
|
|
failf(data, "Server denied you to change to the given directory");
|
|
ftpc->cwdfail = TRUE; /* don't remember this path as we failed
|
|
to enter it */
|
|
return CURLE_REMOTE_ACCESS_DENIED;
|
|
}
|
|
}
|
|
else {
|
|
/* success */
|
|
ftpc->count2=0;
|
|
if(++ftpc->count1 <= ftpc->dirdepth) {
|
|
/* send next CWD */
|
|
NBFTPSENDF(conn, "CWD %s", ftpc->dirs[ftpc->count1 - 1]);
|
|
}
|
|
else {
|
|
result = ftp_state_post_cwd(conn);
|
|
if(result)
|
|
return result;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case FTP_MKD:
|
|
if(ftpcode/100 != 2) {
|
|
/* failure to MKD the dir */
|
|
failf(data, "Failed to MKD dir: %03d", ftpcode);
|
|
return CURLE_REMOTE_ACCESS_DENIED;
|
|
}
|
|
state(conn, FTP_CWD);
|
|
/* send CWD */
|
|
NBFTPSENDF(conn, "CWD %s", ftpc->dirs[ftpc->count1 - 1]);
|
|
break;
|
|
|
|
case FTP_MDTM:
|
|
result = ftp_state_mdtm_resp(conn, ftpcode);
|
|
break;
|
|
|
|
case FTP_TYPE:
|
|
case FTP_LIST_TYPE:
|
|
case FTP_RETR_TYPE:
|
|
case FTP_STOR_TYPE:
|
|
result = ftp_state_type_resp(conn, ftpcode, ftpc->state);
|
|
break;
|
|
|
|
case FTP_SIZE:
|
|
case FTP_RETR_SIZE:
|
|
case FTP_STOR_SIZE:
|
|
result = ftp_state_size_resp(conn, ftpcode, ftpc->state);
|
|
break;
|
|
|
|
case FTP_REST:
|
|
case FTP_RETR_REST:
|
|
result = ftp_state_rest_resp(conn, ftpcode, ftpc->state);
|
|
break;
|
|
|
|
case FTP_PASV:
|
|
result = ftp_state_pasv_resp(conn, ftpcode);
|
|
break;
|
|
|
|
case FTP_PORT:
|
|
result = ftp_state_port_resp(conn, ftpcode);
|
|
break;
|
|
|
|
case FTP_LIST:
|
|
case FTP_RETR:
|
|
result = ftp_state_get_resp(conn, ftpcode, ftpc->state);
|
|
break;
|
|
|
|
case FTP_STOR:
|
|
result = ftp_state_stor_resp(conn, ftpcode);
|
|
break;
|
|
|
|
case FTP_QUIT:
|
|
/* fallthrough, just stop! */
|
|
default:
|
|
/* internal error */
|
|
state(conn, FTP_STOP);
|
|
break;
|
|
}
|
|
} /* if(ftpcode) */
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Returns timeout in ms. 0 or negative number means the timeout has already
|
|
triggered */
|
|
static long ftp_state_timeout(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data=conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
long timeout_ms=360000; /* in milliseconds */
|
|
|
|
if(data->set.ftp_response_timeout )
|
|
/* if CURLOPT_FTP_RESPONSE_TIMEOUT is set, use that to determine remaining
|
|
time. Also, use ftp->response because FTP_RESPONSE_TIMEOUT is supposed
|
|
to govern the response for any given ftp response, not for the time
|
|
from connect to the given ftp response. */
|
|
timeout_ms = data->set.ftp_response_timeout - /* timeout time */
|
|
Curl_tvdiff(Curl_tvnow(), ftpc->response); /* spent time */
|
|
else if(data->set.timeout)
|
|
/* if timeout is requested, find out how much remaining time we have */
|
|
timeout_ms = data->set.timeout - /* timeout time */
|
|
Curl_tvdiff(Curl_tvnow(), conn->now); /* spent time */
|
|
else
|
|
/* Without a requested timeout, we only wait 'response_time' seconds for
|
|
the full response to arrive before we bail out */
|
|
timeout_ms = ftpc->response_time -
|
|
Curl_tvdiff(Curl_tvnow(), ftpc->response); /* spent time */
|
|
|
|
return timeout_ms;
|
|
}
|
|
|
|
|
|
/* called repeatedly until done from multi.c */
|
|
static CURLcode ftp_multi_statemach(struct connectdata *conn,
|
|
bool *done)
|
|
{
|
|
curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
|
int rc;
|
|
struct SessionHandle *data=conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
CURLcode result = CURLE_OK;
|
|
long timeout_ms = ftp_state_timeout(conn);
|
|
|
|
*done = FALSE; /* default to not done yet */
|
|
|
|
if(timeout_ms <= 0) {
|
|
failf(data, "FTP response timeout");
|
|
return CURLE_OPERATION_TIMEDOUT;
|
|
}
|
|
|
|
rc = Curl_socket_ready(ftpc->sendleft?CURL_SOCKET_BAD:sock, /* reading */
|
|
ftpc->sendleft?sock:CURL_SOCKET_BAD, /* writing */
|
|
0);
|
|
|
|
if(rc == -1) {
|
|
failf(data, "select/poll error");
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
else if(rc != 0) {
|
|
result = ftp_statemach_act(conn);
|
|
*done = (bool)(ftpc->state == FTP_STOP);
|
|
}
|
|
/* if rc == 0, then select() timed out */
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_easy_statemach(struct connectdata *conn)
|
|
{
|
|
curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
|
int rc;
|
|
struct SessionHandle *data=conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
while(ftpc->state != FTP_STOP) {
|
|
long timeout_ms = ftp_state_timeout(conn);
|
|
|
|
if(timeout_ms <=0 ) {
|
|
failf(data, "FTP response timeout");
|
|
return CURLE_OPERATION_TIMEDOUT; /* already too little time */
|
|
}
|
|
|
|
rc = Curl_socket_ready(ftpc->sendleft?CURL_SOCKET_BAD:sock, /* reading */
|
|
ftpc->sendleft?sock:CURL_SOCKET_BAD, /* writing */
|
|
(int)timeout_ms);
|
|
|
|
if(rc == -1) {
|
|
failf(data, "select/poll error");
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
else if(rc == 0) {
|
|
result = CURLE_OPERATION_TIMEDOUT;
|
|
break;
|
|
}
|
|
else {
|
|
result = ftp_statemach_act(conn);
|
|
if(result)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize the struct FTP for the current SessionHandle. If
|
|
* need be.
|
|
*/
|
|
static CURLcode ftp_init(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
if(!ftp) {
|
|
ftp = calloc(sizeof(struct FTP), 1);
|
|
if(!ftp)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
data->state.proto.ftp = ftp;
|
|
}
|
|
|
|
/* get some initial data into the ftp struct */
|
|
ftp->bytecountp = &data->req.bytecount;
|
|
|
|
/* No need to duplicate user+password, the connectdata struct won't change
|
|
during a session, but we re-init them here since on subsequent inits
|
|
since the conn struct may have changed or been replaced.
|
|
*/
|
|
ftp->user = conn->user;
|
|
ftp->passwd = conn->passwd;
|
|
if(isBadFtpString(ftp->user) || isBadFtpString(ftp->passwd))
|
|
return CURLE_URL_MALFORMAT;
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/*
|
|
* ftp_connect() should do everything that is to be considered a part of
|
|
* the connection phase.
|
|
*
|
|
* The variable 'done' points to will be TRUE if the protocol-layer connect
|
|
* phase is done when this function returns, or FALSE is not. When called as
|
|
* a part of the easy interface, it will always be TRUE.
|
|
*/
|
|
static CURLcode ftp_connect(struct connectdata *conn,
|
|
bool *done) /* see description above */
|
|
{
|
|
CURLcode result;
|
|
#ifndef CURL_DISABLE_HTTP
|
|
/* for FTP over HTTP proxy */
|
|
struct HTTP http_proxy;
|
|
struct FTP *ftp_save;
|
|
#endif /* CURL_DISABLE_HTTP */
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
struct SessionHandle *data=conn->data;
|
|
|
|
*done = FALSE; /* default to not done yet */
|
|
|
|
/* If there already is a protocol-specific struct allocated for this
|
|
sessionhandle, deal with it */
|
|
Curl_reset_reqproto(conn);
|
|
|
|
result = ftp_init(conn);
|
|
if(result)
|
|
return result;
|
|
|
|
/* We always support persistant connections on ftp */
|
|
conn->bits.close = FALSE;
|
|
|
|
ftpc->response_time = RESP_TIMEOUT; /* set default response time-out */
|
|
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
|
|
/* BLOCKING */
|
|
/* We want "seamless" FTP operations through HTTP proxy tunnel */
|
|
|
|
/* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the member
|
|
* conn->proto.http; we want FTP through HTTP and we have to change the
|
|
* member temporarily for connecting to the HTTP proxy. After
|
|
* Curl_proxyCONNECT we have to set back the member to the original struct
|
|
* FTP pointer
|
|
*/
|
|
ftp_save = data->state.proto.ftp;
|
|
memset(&http_proxy, 0, sizeof(http_proxy));
|
|
data->state.proto.http = &http_proxy;
|
|
|
|
result = Curl_proxyCONNECT(conn, FIRSTSOCKET,
|
|
conn->host.name, conn->remote_port);
|
|
|
|
data->state.proto.ftp = ftp_save;
|
|
|
|
if(CURLE_OK != result)
|
|
return result;
|
|
}
|
|
#endif /* CURL_DISABLE_HTTP */
|
|
|
|
if(conn->protocol & PROT_FTPS) {
|
|
/* BLOCKING */
|
|
/* FTPS is simply ftp with SSL for the control channel */
|
|
/* now, perform the SSL initialization for this socket */
|
|
result = Curl_ssl_connect(conn, FIRSTSOCKET);
|
|
if(result)
|
|
return result;
|
|
}
|
|
|
|
/* When we connect, we start in the state where we await the 220
|
|
response */
|
|
ftp_respinit(conn); /* init the response reader stuff */
|
|
state(conn, FTP_WAIT220);
|
|
ftpc->response = Curl_tvnow(); /* start response time-out now! */
|
|
|
|
if(data->state.used_interface == Curl_if_multi)
|
|
result = ftp_multi_statemach(conn, done);
|
|
else {
|
|
result = ftp_easy_statemach(conn);
|
|
if(!result)
|
|
*done = TRUE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_done()
|
|
*
|
|
* The DONE function. This does what needs to be done after a single DO has
|
|
* performed.
|
|
*
|
|
* Input argument is already checked for validity.
|
|
*/
|
|
static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
|
|
bool premature)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
ssize_t nread;
|
|
int ftpcode;
|
|
CURLcode result=CURLE_OK;
|
|
bool was_ctl_valid = ftpc->ctl_valid;
|
|
char *path;
|
|
const char *path_to_use = data->state.path;
|
|
|
|
if(!ftp)
|
|
/* When the easy handle is removed from the multi while libcurl is still
|
|
* trying to resolve the host name, it seems that the ftp struct is not
|
|
* yet initialized, but the removal action calls Curl_done() which calls
|
|
* this function. So we simply return success if no ftp pointer is set.
|
|
*/
|
|
return CURLE_OK;
|
|
|
|
switch(status) {
|
|
case CURLE_BAD_DOWNLOAD_RESUME:
|
|
case CURLE_FTP_WEIRD_PASV_REPLY:
|
|
case CURLE_FTP_PORT_FAILED:
|
|
case CURLE_FTP_COULDNT_SET_TYPE:
|
|
case CURLE_FTP_COULDNT_RETR_FILE:
|
|
case CURLE_UPLOAD_FAILED:
|
|
case CURLE_REMOTE_ACCESS_DENIED:
|
|
case CURLE_FILESIZE_EXCEEDED:
|
|
case CURLE_REMOTE_FILE_NOT_FOUND:
|
|
/* the connection stays alive fine even though this happened */
|
|
/* fall-through */
|
|
case CURLE_OK: /* doesn't affect the control connection's status */
|
|
if(!premature) {
|
|
ftpc->ctl_valid = was_ctl_valid;
|
|
break;
|
|
}
|
|
/* until we cope better with prematurely ended requests, let them
|
|
* fallback as if in complete failure */
|
|
default: /* by default, an error means the control connection is
|
|
wedged and should not be used anymore */
|
|
ftpc->ctl_valid = FALSE;
|
|
ftpc->cwdfail = TRUE; /* set this TRUE to prevent us to remember the
|
|
current path, as this connection is going */
|
|
conn->bits.close = TRUE; /* marked for closure */
|
|
break;
|
|
}
|
|
|
|
/* now store a copy of the directory we are in */
|
|
if(ftpc->prevpath)
|
|
free(ftpc->prevpath);
|
|
|
|
/* get the "raw" path */
|
|
path = curl_easy_unescape(data, path_to_use, 0, NULL);
|
|
if(!path) {
|
|
/* out of memory, but we can limp along anyway (and should try to
|
|
* since we're in the out of memory cleanup path) */
|
|
ftpc->prevpath = NULL; /* no path */
|
|
|
|
} else {
|
|
size_t flen = ftpc->file?strlen(ftpc->file):0; /* file is "raw" already */
|
|
size_t dlen = strlen(path)-flen;
|
|
if(!ftpc->cwdfail) {
|
|
if(dlen && (data->set.ftp_filemethod != FTPFILE_NOCWD)) {
|
|
ftpc->prevpath = path;
|
|
if(flen)
|
|
/* if 'path' is not the whole string */
|
|
ftpc->prevpath[dlen]=0; /* terminate */
|
|
}
|
|
else {
|
|
/* we never changed dir */
|
|
ftpc->prevpath=strdup("");
|
|
free(path);
|
|
}
|
|
infof(data, "Remembering we are in dir \"%s\"\n", ftpc->prevpath);
|
|
}
|
|
else {
|
|
ftpc->prevpath = NULL; /* no path */
|
|
free(path);
|
|
}
|
|
}
|
|
/* free the dir tree and file parts */
|
|
freedirs(ftpc);
|
|
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
Curl_sec_fflush_fd(conn, conn->sock[SECONDARYSOCKET]);
|
|
#endif
|
|
|
|
/* shut down the socket to inform the server we're done */
|
|
|
|
#ifdef _WIN32_WCE
|
|
shutdown(conn->sock[SECONDARYSOCKET],2); /* SD_BOTH */
|
|
#endif
|
|
|
|
if(conn->sock[SECONDARYSOCKET] != CURL_SOCKET_BAD) {
|
|
if(conn->ssl[SECONDARYSOCKET].use) {
|
|
/* The secondary socket is using SSL so we must close down that part first
|
|
before we close the socket for real */
|
|
Curl_ssl_close(conn, SECONDARYSOCKET);
|
|
|
|
/* Note that we keep "use" set to TRUE since that (next) connection is
|
|
still requested to use SSL */
|
|
}
|
|
sclose(conn->sock[SECONDARYSOCKET]);
|
|
|
|
conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
|
|
}
|
|
|
|
if((ftp->transfer == FTPTRANSFER_BODY) && !status && !premature) {
|
|
/*
|
|
* Let's see what the server says about the transfer we just performed,
|
|
* but lower the timeout as sometimes this connection has died while the
|
|
* data has been transfered. This happens when doing through NATs etc that
|
|
* abandon old silent connections.
|
|
*/
|
|
long old_time = ftpc->response_time;
|
|
|
|
ftpc->response_time = 60*1000; /* give it only a minute for now */
|
|
|
|
result = Curl_GetFTPResponse(&nread, conn, &ftpcode);
|
|
|
|
ftpc->response_time = old_time; /* set this back to previous value */
|
|
|
|
if(!nread && (CURLE_OPERATION_TIMEDOUT == result)) {
|
|
failf(data, "control connection looks dead");
|
|
ftpc->ctl_valid = FALSE; /* mark control connection as bad */
|
|
conn->bits.close = TRUE; /* mark for closure */
|
|
}
|
|
|
|
if(result)
|
|
return result;
|
|
|
|
if(!ftpc->dont_check) {
|
|
/* 226 Transfer complete, 250 Requested file action okay, completed. */
|
|
if((ftpcode != 226) && (ftpcode != 250)) {
|
|
failf(data, "server did not report OK, got %d", ftpcode);
|
|
result = CURLE_PARTIAL_FILE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if(result || premature)
|
|
/* the response code from the transfer showed an error already so no
|
|
use checking further */
|
|
;
|
|
else if(data->set.upload) {
|
|
if((-1 != data->set.infilesize) &&
|
|
(data->set.infilesize != *ftp->bytecountp) &&
|
|
!data->set.crlf &&
|
|
(ftp->transfer == FTPTRANSFER_BODY)) {
|
|
failf(data, "Uploaded unaligned file size (%" FORMAT_OFF_T
|
|
" out of %" FORMAT_OFF_T " bytes)",
|
|
*ftp->bytecountp, data->set.infilesize);
|
|
result = CURLE_PARTIAL_FILE;
|
|
}
|
|
}
|
|
else {
|
|
if((-1 != data->req.size) &&
|
|
(data->req.size != *ftp->bytecountp) &&
|
|
#ifdef CURL_DO_LINEEND_CONV
|
|
/* Most FTP servers don't adjust their file SIZE response for CRLFs, so
|
|
* we'll check to see if the discrepancy can be explained by the number
|
|
* of CRLFs we've changed to LFs.
|
|
*/
|
|
((data->req.size + data->state.crlf_conversions) !=
|
|
*ftp->bytecountp) &&
|
|
#endif /* CURL_DO_LINEEND_CONV */
|
|
(data->req.maxdownload != *ftp->bytecountp)) {
|
|
failf(data, "Received only partial file: %" FORMAT_OFF_T " bytes",
|
|
*ftp->bytecountp);
|
|
result = CURLE_PARTIAL_FILE;
|
|
}
|
|
else if(!ftpc->dont_check &&
|
|
!*ftp->bytecountp &&
|
|
(data->req.size>0)) {
|
|
failf(data, "No data was received!");
|
|
result = CURLE_FTP_COULDNT_RETR_FILE;
|
|
}
|
|
}
|
|
|
|
/* clear these for next connection */
|
|
ftp->transfer = FTPTRANSFER_BODY;
|
|
ftpc->dont_check = FALSE;
|
|
|
|
/* Send any post-transfer QUOTE strings? */
|
|
if(!status && !result && !premature && data->set.postquote)
|
|
result = ftp_sendquote(conn, data->set.postquote);
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_sendquote()
|
|
*
|
|
* Where a 'quote' means a list of custom commands to send to the server.
|
|
* The quote list is passed as an argument.
|
|
*/
|
|
|
|
static
|
|
CURLcode ftp_sendquote(struct connectdata *conn, struct curl_slist *quote)
|
|
{
|
|
struct curl_slist *item;
|
|
ssize_t nread;
|
|
int ftpcode;
|
|
CURLcode result;
|
|
|
|
item = quote;
|
|
while(item) {
|
|
if(item->data) {
|
|
FTPSENDF(conn, "%s", item->data);
|
|
|
|
result = Curl_GetFTPResponse(&nread, conn, &ftpcode);
|
|
if(result)
|
|
return result;
|
|
|
|
if(ftpcode >= 400) {
|
|
failf(conn->data, "QUOT string not accepted: %s", item->data);
|
|
return CURLE_QUOTE_ERROR;
|
|
}
|
|
}
|
|
|
|
item = item->next;
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_need_type()
|
|
*
|
|
* Returns TRUE if we in the current situation should send TYPE
|
|
*/
|
|
static int ftp_need_type(struct connectdata *conn,
|
|
bool ascii_wanted)
|
|
{
|
|
return conn->proto.ftpc.transfertype != (ascii_wanted?'A':'I');
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_nb_type()
|
|
*
|
|
* Set TYPE. We only deal with ASCII or BINARY so this function
|
|
* sets one of them.
|
|
* If the transfer type is not sent, simulate on OK response in newstate
|
|
*/
|
|
static CURLcode ftp_nb_type(struct connectdata *conn,
|
|
bool ascii, ftpstate newstate)
|
|
{
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
CURLcode result;
|
|
char want = (char)(ascii?'A':'I');
|
|
|
|
if(ftpc->transfertype == want) {
|
|
state(conn, newstate);
|
|
return ftp_state_type_resp(conn, 200, newstate);
|
|
}
|
|
|
|
NBFTPSENDF(conn, "TYPE %c", want);
|
|
state(conn, newstate);
|
|
|
|
/* keep track of our current transfer type */
|
|
ftpc->transfertype = want;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/***************************************************************************
|
|
*
|
|
* ftp_pasv_verbose()
|
|
*
|
|
* This function only outputs some informationals about this second connection
|
|
* when we've issued a PASV command before and thus we have connected to a
|
|
* possibly new IP address.
|
|
*
|
|
*/
|
|
#ifndef CURL_DISABLE_VERBOSE_STRINGS
|
|
static void
|
|
ftp_pasv_verbose(struct connectdata *conn,
|
|
Curl_addrinfo *ai,
|
|
char *newhost, /* ascii version */
|
|
int port)
|
|
{
|
|
char buf[256];
|
|
Curl_printable_address(ai, buf, sizeof(buf));
|
|
infof(conn->data, "Connecting to %s (%s) port %d\n", newhost, buf, port);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
Check if this is a range download, and if so, set the internal variables
|
|
properly.
|
|
*/
|
|
|
|
static CURLcode ftp_range(struct connectdata *conn)
|
|
{
|
|
curl_off_t from, to;
|
|
curl_off_t totalsize=-1;
|
|
char *ptr;
|
|
char *ptr2;
|
|
struct SessionHandle *data = conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if(data->state.use_range && data->state.range) {
|
|
from=curlx_strtoofft(data->state.range, &ptr, 0);
|
|
while(ptr && *ptr && (ISSPACE(*ptr) || (*ptr=='-')))
|
|
ptr++;
|
|
to=curlx_strtoofft(ptr, &ptr2, 0);
|
|
if(ptr == ptr2) {
|
|
/* we didn't get any digit */
|
|
to=-1;
|
|
}
|
|
if((-1 == to) && (from>=0)) {
|
|
/* X - */
|
|
data->state.resume_from = from;
|
|
DEBUGF(infof(conn->data, "FTP RANGE %" FORMAT_OFF_T " to end of file\n",
|
|
from));
|
|
}
|
|
else if(from < 0) {
|
|
/* -Y */
|
|
totalsize = -from;
|
|
data->req.maxdownload = -from;
|
|
data->state.resume_from = from;
|
|
DEBUGF(infof(conn->data, "FTP RANGE the last %" FORMAT_OFF_T " bytes\n",
|
|
totalsize));
|
|
}
|
|
else {
|
|
/* X-Y */
|
|
totalsize = to-from;
|
|
data->req.maxdownload = totalsize+1; /* include last byte */
|
|
data->state.resume_from = from;
|
|
DEBUGF(infof(conn->data, "FTP RANGE from %" FORMAT_OFF_T
|
|
" getting %" FORMAT_OFF_T " bytes\n",
|
|
from, data->req.maxdownload));
|
|
}
|
|
DEBUGF(infof(conn->data, "range-download from %" FORMAT_OFF_T
|
|
" to %" FORMAT_OFF_T ", totally %" FORMAT_OFF_T " bytes\n",
|
|
from, to, data->req.maxdownload));
|
|
ftpc->dont_check = TRUE; /* dont check for successful transfer */
|
|
}
|
|
else
|
|
data->req.maxdownload = -1;
|
|
return CURLE_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
* ftp_nextconnect()
|
|
*
|
|
* This function shall be called when the second FTP (data) connection is
|
|
* connected.
|
|
*/
|
|
|
|
static CURLcode ftp_nextconnect(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data=conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
CURLcode result = CURLE_OK;
|
|
|
|
/* the ftp struct is inited in ftp_connect() */
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
|
|
DEBUGF(infof(data, "DO-MORE phase starts\n"));
|
|
|
|
if(ftp->transfer <= FTPTRANSFER_INFO) {
|
|
/* a transfer is about to take place, or if not a file name was given
|
|
so we'll do a SIZE on it later and then we need the right TYPE first */
|
|
|
|
if(data->set.upload) {
|
|
result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_STOR_TYPE);
|
|
if(result)
|
|
return result;
|
|
}
|
|
else {
|
|
/* download */
|
|
ftp->downloadsize = -1; /* unknown as of yet */
|
|
|
|
result = ftp_range(conn);
|
|
if(result)
|
|
;
|
|
else if(data->set.ftp_list_only || !ftpc->file) {
|
|
/* The specified path ends with a slash, and therefore we think this
|
|
is a directory that is requested, use LIST. But before that we
|
|
need to set ASCII transfer mode. */
|
|
|
|
/* But only if a body transfer was requested. */
|
|
if(ftp->transfer == FTPTRANSFER_BODY) {
|
|
result = ftp_nb_type(conn, 1, FTP_LIST_TYPE);
|
|
if(result)
|
|
return result;
|
|
}
|
|
/* otherwise just fall through */
|
|
}
|
|
else {
|
|
result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_RETR_TYPE);
|
|
if(result)
|
|
return result;
|
|
}
|
|
}
|
|
result = ftp_easy_statemach(conn);
|
|
}
|
|
|
|
if((result == CURLE_OK) && (ftp->transfer != FTPTRANSFER_BODY))
|
|
/* no data to transfer. FIX: it feels like a kludge to have this here
|
|
too! */
|
|
result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
|
|
|
/* end of transfer */
|
|
DEBUGF(infof(data, "DO-MORE phase ends with %d\n", result));
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_perform()
|
|
*
|
|
* This is the actual DO function for FTP. Get a file/directory according to
|
|
* the options previously setup.
|
|
*/
|
|
|
|
static
|
|
CURLcode ftp_perform(struct connectdata *conn,
|
|
bool *connected, /* connect status after PASV / PORT */
|
|
bool *dophase_done)
|
|
{
|
|
/* this is FTP and no proxy */
|
|
CURLcode result=CURLE_OK;
|
|
|
|
DEBUGF(infof(conn->data, "DO phase starts\n"));
|
|
|
|
if(conn->data->set.opt_no_body) {
|
|
/* requested no body means no transfer... */
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
ftp->transfer = FTPTRANSFER_INFO;
|
|
}
|
|
|
|
|
|
*dophase_done = FALSE; /* not done yet */
|
|
|
|
/* start the first command in the DO phase */
|
|
result = ftp_state_quote(conn, TRUE, FTP_QUOTE);
|
|
if(result)
|
|
return result;
|
|
|
|
/* run the state-machine */
|
|
if(conn->data->state.used_interface == Curl_if_multi)
|
|
result = ftp_multi_statemach(conn, dophase_done);
|
|
else {
|
|
result = ftp_easy_statemach(conn);
|
|
*dophase_done = TRUE; /* with the easy interface we are done here */
|
|
}
|
|
*connected = conn->bits.tcpconnect;
|
|
|
|
if(*dophase_done)
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_do()
|
|
*
|
|
* This function is registered as 'curl_do' function. It decodes the path
|
|
* parts etc as a wrapper to the actual DO function (ftp_perform).
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*/
|
|
static CURLcode ftp_do(struct connectdata *conn, bool *done)
|
|
{
|
|
CURLcode retcode = CURLE_OK;
|
|
|
|
*done = FALSE; /* default to false */
|
|
|
|
/*
|
|
Since connections can be re-used between SessionHandles, this might be a
|
|
connection already existing but on a fresh SessionHandle struct so we must
|
|
make sure we have a good 'struct FTP' to play with. For new connections,
|
|
the struct FTP is allocated and setup in the ftp_connect() function.
|
|
*/
|
|
Curl_reset_reqproto(conn);
|
|
retcode = ftp_init(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
retcode = ftp_parse_url_path(conn);
|
|
if(retcode)
|
|
return retcode;
|
|
|
|
retcode = ftp_regular_transfer(conn, done);
|
|
|
|
return retcode;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* Curl_(nb)ftpsendf()
|
|
*
|
|
* Sends the formated string as a ftp command to a ftp server
|
|
*
|
|
* NOTE: we build the command in a fixed-length buffer, which sets length
|
|
* restrictions on the command!
|
|
*
|
|
* The "nb" version is made to Never Block.
|
|
*/
|
|
CURLcode Curl_nbftpsendf(struct connectdata *conn,
|
|
const char *fmt, ...)
|
|
{
|
|
ssize_t bytes_written;
|
|
/* may still not be big enough for some krb5 tokens */
|
|
#define SBUF_SIZE 1024
|
|
char s[SBUF_SIZE];
|
|
size_t write_len;
|
|
char *sptr=s;
|
|
CURLcode res = CURLE_OK;
|
|
struct SessionHandle *data = conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
enum protection_level data_sec = conn->data_prot;
|
|
#endif
|
|
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
vsnprintf(s, SBUF_SIZE-3, fmt, ap);
|
|
va_end(ap);
|
|
|
|
strcat(s, "\r\n"); /* append a trailing CRLF */
|
|
|
|
bytes_written=0;
|
|
write_len = strlen(s);
|
|
|
|
ftp_respinit(conn);
|
|
|
|
#ifdef CURL_DOES_CONVERSIONS
|
|
res = Curl_convert_to_network(data, s, write_len);
|
|
/* Curl_convert_to_network calls failf if unsuccessful */
|
|
if(res != CURLE_OK) {
|
|
return res;
|
|
}
|
|
#endif /* CURL_DOES_CONVERSIONS */
|
|
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
conn->data_prot = prot_cmd;
|
|
#endif
|
|
res = Curl_write(conn, conn->sock[FIRSTSOCKET], sptr, write_len,
|
|
&bytes_written);
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
conn->data_prot = data_sec;
|
|
#endif
|
|
|
|
if(CURLE_OK != res)
|
|
return res;
|
|
|
|
if(conn->data->set.verbose)
|
|
Curl_debug(conn->data, CURLINFO_HEADER_OUT,
|
|
sptr, (size_t)bytes_written, conn);
|
|
|
|
if(bytes_written != (ssize_t)write_len) {
|
|
/* the whole chunk was not sent, store the rest of the data */
|
|
write_len -= bytes_written;
|
|
sptr += bytes_written;
|
|
ftpc->sendthis = malloc(write_len);
|
|
if(ftpc->sendthis) {
|
|
memcpy(ftpc->sendthis, sptr, write_len);
|
|
ftpc->sendsize = ftpc->sendleft = write_len;
|
|
}
|
|
else {
|
|
failf(data, "out of memory");
|
|
res = CURLE_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
else
|
|
ftpc->response = Curl_tvnow();
|
|
|
|
return res;
|
|
}
|
|
|
|
CURLcode Curl_ftpsendf(struct connectdata *conn,
|
|
const char *fmt, ...)
|
|
{
|
|
ssize_t bytes_written;
|
|
char s[SBUF_SIZE];
|
|
size_t write_len;
|
|
char *sptr=s;
|
|
CURLcode res = CURLE_OK;
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
enum protection_level data_sec = conn->data_prot;
|
|
#endif
|
|
|
|
va_list ap;
|
|
va_start(ap, fmt);
|
|
vsnprintf(s, SBUF_SIZE-3, fmt, ap);
|
|
va_end(ap);
|
|
|
|
strcat(s, "\r\n"); /* append a trailing CRLF */
|
|
|
|
bytes_written=0;
|
|
write_len = strlen(s);
|
|
|
|
#ifdef CURL_DOES_CONVERSIONS
|
|
res = Curl_convert_to_network(conn->data, s, write_len);
|
|
/* Curl_convert_to_network calls failf if unsuccessful */
|
|
if(res != CURLE_OK) {
|
|
return(res);
|
|
}
|
|
#endif /* CURL_DOES_CONVERSIONS */
|
|
|
|
while(1) {
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
conn->data_prot = prot_cmd;
|
|
#endif
|
|
res = Curl_write(conn, conn->sock[FIRSTSOCKET], sptr, write_len,
|
|
&bytes_written);
|
|
#if defined(HAVE_KRB4) || defined(HAVE_GSSAPI)
|
|
conn->data_prot = data_sec;
|
|
#endif
|
|
|
|
if(CURLE_OK != res)
|
|
break;
|
|
|
|
if(conn->data->set.verbose)
|
|
Curl_debug(conn->data, CURLINFO_HEADER_OUT,
|
|
sptr, (size_t)bytes_written, conn);
|
|
|
|
if(bytes_written != (ssize_t)write_len) {
|
|
write_len -= bytes_written;
|
|
sptr += bytes_written;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_quit()
|
|
*
|
|
* This should be called before calling sclose() on an ftp control connection
|
|
* (not data connections). We should then wait for the response from the
|
|
* server before returning. The calling code should then try to close the
|
|
* connection.
|
|
*
|
|
*/
|
|
static CURLcode ftp_quit(struct connectdata *conn)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
|
|
if(conn->proto.ftpc.ctl_valid) {
|
|
NBFTPSENDF(conn, "QUIT", NULL);
|
|
state(conn, FTP_QUIT);
|
|
|
|
result = ftp_easy_statemach(conn);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_disconnect()
|
|
*
|
|
* Disconnect from an FTP server. Cleanup protocol-specific per-connection
|
|
* resources. BLOCKING.
|
|
*/
|
|
static CURLcode ftp_disconnect(struct connectdata *conn)
|
|
{
|
|
struct ftp_conn *ftpc= &conn->proto.ftpc;
|
|
|
|
/* We cannot send quit unconditionally. If this connection is stale or
|
|
bad in any way, sending quit and waiting around here will make the
|
|
disconnect wait in vain and cause more problems than we need to.
|
|
|
|
ftp_quit() will check the state of ftp->ctl_valid. If it's ok it
|
|
will try to send the QUIT command, otherwise it will just return.
|
|
*/
|
|
|
|
/* The FTP session may or may not have been allocated/setup at this point! */
|
|
(void)ftp_quit(conn); /* ignore errors on the QUIT */
|
|
|
|
if(ftpc->entrypath) {
|
|
struct SessionHandle *data = conn->data;
|
|
if(data->state.most_recent_ftp_entrypath == ftpc->entrypath) {
|
|
data->state.most_recent_ftp_entrypath = NULL;
|
|
}
|
|
free(ftpc->entrypath);
|
|
ftpc->entrypath = NULL;
|
|
}
|
|
if(ftpc->cache) {
|
|
free(ftpc->cache);
|
|
ftpc->cache = NULL;
|
|
}
|
|
freedirs(ftpc);
|
|
if(ftpc->prevpath) {
|
|
free(ftpc->prevpath);
|
|
ftpc->prevpath = NULL;
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_parse_url_path()
|
|
*
|
|
* Parse the URL path into separate path components.
|
|
*
|
|
*/
|
|
static
|
|
CURLcode ftp_parse_url_path(struct connectdata *conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
/* the ftp struct is already inited in ftp_connect() */
|
|
struct FTP *ftp = data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
const char *slash_pos; /* position of the first '/' char in curpos */
|
|
const char *path_to_use = data->state.path;
|
|
const char *cur_pos;
|
|
const char *filename = NULL;
|
|
|
|
cur_pos = path_to_use; /* current position in path. point at the begin
|
|
of next path component */
|
|
|
|
ftpc->ctl_valid = FALSE;
|
|
ftpc->cwdfail = FALSE;
|
|
|
|
switch(data->set.ftp_filemethod) {
|
|
case FTPFILE_NOCWD:
|
|
/* fastest, but less standard-compliant */
|
|
|
|
/*
|
|
The best time to check whether the path is a file or directory is right
|
|
here. so:
|
|
|
|
the first condition in the if() right here, is there just in case
|
|
someone decides to set path to NULL one day
|
|
*/
|
|
if(data->state.path &&
|
|
data->state.path[0] &&
|
|
(data->state.path[strlen(data->state.path) - 1] != '/') )
|
|
filename = data->state.path; /* this is a full file path */
|
|
/*
|
|
ftpc->file is not used anywhere other than for operations on a file.
|
|
In other words, never for directory operations.
|
|
So we can safely leave filename as NULL here and use it as a
|
|
argument in dir/file decisions.
|
|
*/
|
|
break;
|
|
|
|
case FTPFILE_SINGLECWD:
|
|
/* get the last slash */
|
|
if(!path_to_use[0]) {
|
|
/* no dir, no file */
|
|
ftpc->dirdepth = 0;
|
|
break;
|
|
}
|
|
slash_pos=strrchr(cur_pos, '/');
|
|
if(slash_pos || !*cur_pos) {
|
|
ftpc->dirs = calloc(1, sizeof(ftpc->dirs[0]));
|
|
if(!ftpc->dirs)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
ftpc->dirs[0] = curl_easy_unescape(conn->data, slash_pos ? cur_pos : "/",
|
|
slash_pos?(int)(slash_pos-cur_pos):1,
|
|
NULL);
|
|
if(!ftpc->dirs[0]) {
|
|
freedirs(ftpc);
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
ftpc->dirdepth = 1; /* we consider it to be a single dir */
|
|
filename = slash_pos ? slash_pos+1 : cur_pos; /* rest is file name */
|
|
}
|
|
else
|
|
filename = cur_pos; /* this is a file name only */
|
|
break;
|
|
|
|
default: /* allow pretty much anything */
|
|
case FTPFILE_MULTICWD:
|
|
ftpc->dirdepth = 0;
|
|
ftpc->diralloc = 5; /* default dir depth to allocate */
|
|
ftpc->dirs = calloc(ftpc->diralloc, sizeof(ftpc->dirs[0]));
|
|
if(!ftpc->dirs)
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
/* we have a special case for listing the root dir only */
|
|
if(strequal(path_to_use, "/")) {
|
|
cur_pos++; /* make it point to the zero byte */
|
|
ftpc->dirs[0] = strdup("/");
|
|
ftpc->dirdepth++;
|
|
}
|
|
else {
|
|
/* parse the URL path into separate path components */
|
|
while((slash_pos = strchr(cur_pos, '/')) != NULL) {
|
|
/* 1 or 0 to indicate absolute directory */
|
|
bool absolute_dir = (bool)((cur_pos - data->state.path > 0) &&
|
|
(ftpc->dirdepth == 0));
|
|
|
|
/* seek out the next path component */
|
|
if(slash_pos-cur_pos) {
|
|
/* we skip empty path components, like "x//y" since the FTP command
|
|
CWD requires a parameter and a non-existant parameter a) doesn't
|
|
work on many servers and b) has no effect on the others. */
|
|
int len = (int)(slash_pos - cur_pos + absolute_dir);
|
|
ftpc->dirs[ftpc->dirdepth] =
|
|
curl_easy_unescape(conn->data, cur_pos - absolute_dir, len, NULL);
|
|
if(!ftpc->dirs[ftpc->dirdepth]) { /* run out of memory ... */
|
|
failf(data, "no memory");
|
|
freedirs(ftpc);
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
if(isBadFtpString(ftpc->dirs[ftpc->dirdepth])) {
|
|
free(ftpc->dirs[ftpc->dirdepth]);
|
|
freedirs(ftpc);
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
}
|
|
else {
|
|
cur_pos = slash_pos + 1; /* jump to the rest of the string */
|
|
continue;
|
|
}
|
|
|
|
cur_pos = slash_pos + 1; /* jump to the rest of the string */
|
|
if(++ftpc->dirdepth >= ftpc->diralloc) {
|
|
/* enlarge array */
|
|
char *bigger;
|
|
ftpc->diralloc *= 2; /* double the size each time */
|
|
bigger = realloc(ftpc->dirs, ftpc->diralloc * sizeof(ftpc->dirs[0]));
|
|
if(!bigger) {
|
|
freedirs(ftpc);
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
ftpc->dirs = (char **)bigger;
|
|
}
|
|
}
|
|
}
|
|
filename = cur_pos; /* the rest is the file name */
|
|
break;
|
|
} /* switch */
|
|
|
|
if(filename && *filename) {
|
|
ftpc->file = curl_easy_unescape(conn->data, filename, 0, NULL);
|
|
if(NULL == ftpc->file) {
|
|
freedirs(ftpc);
|
|
failf(data, "no memory");
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
if(isBadFtpString(ftpc->file)) {
|
|
freedirs(ftpc);
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
}
|
|
else
|
|
ftpc->file=NULL; /* instead of point to a zero byte, we make it a NULL
|
|
pointer */
|
|
|
|
if(data->set.upload && !ftpc->file && (ftp->transfer == FTPTRANSFER_BODY)) {
|
|
/* We need a file name when uploading. Return error! */
|
|
failf(data, "Uploading to a URL without a file name!");
|
|
return CURLE_URL_MALFORMAT;
|
|
}
|
|
|
|
ftpc->cwddone = FALSE; /* default to not done */
|
|
|
|
if(ftpc->prevpath) {
|
|
/* prevpath is "raw" so we convert the input path before we compare the
|
|
strings */
|
|
int dlen;
|
|
char *path = curl_easy_unescape(conn->data, data->state.path, 0, &dlen);
|
|
if(!path) {
|
|
freedirs(ftpc);
|
|
return CURLE_OUT_OF_MEMORY;
|
|
}
|
|
|
|
dlen -= ftpc->file?strlen(ftpc->file):0;
|
|
if((dlen == (int)strlen(ftpc->prevpath)) &&
|
|
strnequal(path, ftpc->prevpath, dlen)) {
|
|
infof(data, "Request has same path as previous transfer\n");
|
|
ftpc->cwddone = TRUE;
|
|
}
|
|
free(path);
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
/* call this when the DO phase has completed */
|
|
static CURLcode ftp_dophase_done(struct connectdata *conn,
|
|
bool connected)
|
|
{
|
|
CURLcode result = CURLE_OK;
|
|
struct FTP *ftp = conn->data->state.proto.ftp;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
|
|
if(connected)
|
|
result = ftp_nextconnect(conn);
|
|
|
|
if(result && (conn->sock[SECONDARYSOCKET] != CURL_SOCKET_BAD)) {
|
|
/* Failure detected, close the second socket if it was created already */
|
|
sclose(conn->sock[SECONDARYSOCKET]);
|
|
conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
|
|
return result;
|
|
}
|
|
|
|
if(ftp->transfer != FTPTRANSFER_BODY)
|
|
/* no data to transfer */
|
|
result=Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
|
else if(!connected)
|
|
/* since we didn't connect now, we want do_more to get called */
|
|
conn->bits.do_more = TRUE;
|
|
|
|
ftpc->ctl_valid = TRUE; /* seems good */
|
|
|
|
return result;
|
|
}
|
|
|
|
/* called from multi.c while DOing */
|
|
static CURLcode ftp_doing(struct connectdata *conn,
|
|
bool *dophase_done)
|
|
{
|
|
CURLcode result;
|
|
result = ftp_multi_statemach(conn, dophase_done);
|
|
|
|
if(*dophase_done) {
|
|
result = ftp_dophase_done(conn, FALSE /* not connected */);
|
|
|
|
DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/***********************************************************************
|
|
*
|
|
* ftp_regular_transfer()
|
|
*
|
|
* The input argument is already checked for validity.
|
|
*
|
|
* Performs all commands done before a regular transfer between a local and a
|
|
* remote host.
|
|
*
|
|
* ftp->ctl_valid starts out as FALSE, and gets set to TRUE if we reach the
|
|
* ftp_done() function without finding any major problem.
|
|
*/
|
|
static
|
|
CURLcode ftp_regular_transfer(struct connectdata *conn,
|
|
bool *dophase_done)
|
|
{
|
|
CURLcode result=CURLE_OK;
|
|
bool connected=0;
|
|
struct SessionHandle *data = conn->data;
|
|
struct ftp_conn *ftpc = &conn->proto.ftpc;
|
|
data->req.size = -1; /* make sure this is unknown at this point */
|
|
|
|
Curl_pgrsSetUploadCounter(data, 0);
|
|
Curl_pgrsSetDownloadCounter(data, 0);
|
|
Curl_pgrsSetUploadSize(data, 0);
|
|
Curl_pgrsSetDownloadSize(data, 0);
|
|
|
|
ftpc->ctl_valid = TRUE; /* starts good */
|
|
|
|
result = ftp_perform(conn,
|
|
&connected, /* have we connected after PASV/PORT */
|
|
dophase_done); /* all commands in the DO-phase done? */
|
|
|
|
if(CURLE_OK == result) {
|
|
|
|
if(!*dophase_done)
|
|
/* the DO phase has not completed yet */
|
|
return CURLE_OK;
|
|
|
|
result = ftp_dophase_done(conn, connected);
|
|
if(result)
|
|
return result;
|
|
}
|
|
else
|
|
freedirs(ftpc);
|
|
|
|
return result;
|
|
}
|
|
|
|
static CURLcode ftp_setup_connection(struct connectdata * conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
char * type;
|
|
char command;
|
|
|
|
if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
|
|
/* Unless we have asked to tunnel ftp operations through the proxy, we
|
|
switch and use HTTP operations only */
|
|
#ifndef CURL_DISABLE_HTTP
|
|
if(conn->handler == &Curl_handler_ftp)
|
|
conn->handler = &Curl_handler_ftp_proxy;
|
|
else {
|
|
#ifdef USE_SSL
|
|
conn->handler = &Curl_handler_ftps_proxy;
|
|
#else
|
|
failf(data, "FTPS not supported!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
|
|
#else
|
|
failf(data, "FTP over http proxy requires HTTP support built-in!");
|
|
return CURLE_UNSUPPORTED_PROTOCOL;
|
|
#endif
|
|
}
|
|
|
|
data->state.path++; /* don't include the initial slash */
|
|
|
|
/* FTP URLs support an extension like ";type=<typecode>" that
|
|
* we'll try to get now! */
|
|
type = strstr(data->state.path, ";type=");
|
|
|
|
if(!type)
|
|
type = strstr(conn->host.rawalloc, ";type=");
|
|
|
|
if(type) {
|
|
*type = 0; /* it was in the middle of the hostname */
|
|
command = (char) toupper((int) type[6]);
|
|
|
|
switch (command) {
|
|
case 'A': /* ASCII mode */
|
|
data->set.prefer_ascii = TRUE;
|
|
break;
|
|
|
|
case 'D': /* directory mode */
|
|
data->set.ftp_list_only = TRUE;
|
|
break;
|
|
|
|
case 'I': /* binary mode */
|
|
default:
|
|
/* switch off ASCII */
|
|
data->set.prefer_ascii = FALSE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return CURLE_OK;
|
|
}
|
|
|
|
#ifdef USE_SSL
|
|
static CURLcode ftps_setup_connection(struct connectdata * conn)
|
|
{
|
|
struct SessionHandle *data = conn->data;
|
|
|
|
conn->ssl[SECONDARYSOCKET].use = data->set.ftp_ssl != CURLUSESSL_CONTROL;
|
|
return ftp_setup_connection(conn);
|
|
}
|
|
#endif
|
|
|
|
#endif /* CURL_DISABLE_FTP */
|