[164] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #ifndef CURL_DISABLE_FTP
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| 26 |
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| 27 | #ifdef HAVE_NETINET_IN_H
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| 28 | #include <netinet/in.h>
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| 29 | #endif
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| 30 | #ifdef HAVE_ARPA_INET_H
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| 31 | #include <arpa/inet.h>
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| 32 | #endif
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| 33 | #ifdef HAVE_UTSNAME_H
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| 34 | #include <sys/utsname.h>
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| 35 | #endif
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| 36 | #ifdef HAVE_NETDB_H
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| 37 | #include <netdb.h>
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| 38 | #endif
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| 39 | #ifdef __VMS
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| 40 | #include <in.h>
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| 41 | #include <inet.h>
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| 42 | #endif
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| 43 |
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| 44 | #if (defined(NETWARE) && defined(__NOVELL_LIBC__))
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| 45 | #undef in_addr_t
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| 46 | #define in_addr_t unsigned long
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| 47 | #endif
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| 48 |
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| 49 | #include <curl/curl.h>
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| 50 | #include "urldata.h"
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| 51 | #include "sendf.h"
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| 52 | #include "if2ip.h"
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| 53 | #include "hostip.h"
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| 54 | #include "progress.h"
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| 55 | #include "transfer.h"
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| 56 | #include "escape.h"
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| 57 | #include "http.h" /* for HTTP proxy tunnel stuff */
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| 58 | #include "socks.h"
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| 59 | #include "ftp.h"
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| 60 | #include "fileinfo.h"
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| 61 | #include "ftplistparser.h"
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| 62 | #include "curl_sec.h"
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| 63 | #include "strtoofft.h"
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| 64 | #include "strequal.h"
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| 65 | #include "vtls/vtls.h"
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| 66 | #include "connect.h"
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| 67 | #include "strerror.h"
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| 68 | #include "inet_ntop.h"
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| 69 | #include "inet_pton.h"
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| 70 | #include "select.h"
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| 71 | #include "parsedate.h" /* for the week day and month names */
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| 72 | #include "sockaddr.h" /* required for Curl_sockaddr_storage */
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| 73 | #include "multiif.h"
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| 74 | #include "url.h"
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| 75 | #include "rawstr.h"
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| 76 | #include "speedcheck.h"
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| 77 | #include "warnless.h"
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| 78 | #include "http_proxy.h"
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| 79 | #include "non-ascii.h"
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| 80 | #include "curl_printf.h"
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| 81 |
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| 82 | #include "curl_memory.h"
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| 83 | /* The last #include file should be: */
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| 84 | #include "memdebug.h"
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| 85 |
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| 86 | #ifndef NI_MAXHOST
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| 87 | #define NI_MAXHOST 1025
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| 88 | #endif
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| 89 | #ifndef INET_ADDRSTRLEN
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| 90 | #define INET_ADDRSTRLEN 16
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| 91 | #endif
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| 92 |
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| 93 | #ifdef CURL_DISABLE_VERBOSE_STRINGS
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| 94 | #define ftp_pasv_verbose(a,b,c,d) Curl_nop_stmt
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| 95 | #endif
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| 96 |
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| 97 | /* Local API functions */
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| 98 | #ifndef DEBUGBUILD
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| 99 | static void _state(struct connectdata *conn,
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| 100 | ftpstate newstate);
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| 101 | #define state(x,y) _state(x,y)
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| 102 | #else
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| 103 | static void _state(struct connectdata *conn,
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| 104 | ftpstate newstate,
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| 105 | int lineno);
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| 106 | #define state(x,y) _state(x,y,__LINE__)
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| 107 | #endif
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| 108 |
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| 109 | static CURLcode ftp_sendquote(struct connectdata *conn,
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| 110 | struct curl_slist *quote);
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| 111 | static CURLcode ftp_quit(struct connectdata *conn);
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| 112 | static CURLcode ftp_parse_url_path(struct connectdata *conn);
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| 113 | static CURLcode ftp_regular_transfer(struct connectdata *conn, bool *done);
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| 114 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
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| 115 | static void ftp_pasv_verbose(struct connectdata *conn,
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| 116 | Curl_addrinfo *ai,
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| 117 | char *newhost, /* ascii version */
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| 118 | int port);
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| 119 | #endif
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| 120 | static CURLcode ftp_state_prepare_transfer(struct connectdata *conn);
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| 121 | static CURLcode ftp_state_mdtm(struct connectdata *conn);
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| 122 | static CURLcode ftp_state_quote(struct connectdata *conn,
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| 123 | bool init, ftpstate instate);
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| 124 | static CURLcode ftp_nb_type(struct connectdata *conn,
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| 125 | bool ascii, ftpstate newstate);
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| 126 | static int ftp_need_type(struct connectdata *conn,
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| 127 | bool ascii);
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| 128 | static CURLcode ftp_do(struct connectdata *conn, bool *done);
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| 129 | static CURLcode ftp_done(struct connectdata *conn,
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| 130 | CURLcode, bool premature);
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| 131 | static CURLcode ftp_connect(struct connectdata *conn, bool *done);
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| 132 | static CURLcode ftp_disconnect(struct connectdata *conn, bool dead_connection);
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| 133 | static CURLcode ftp_do_more(struct connectdata *conn, int *completed);
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| 134 | static CURLcode ftp_multi_statemach(struct connectdata *conn, bool *done);
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| 135 | static int ftp_getsock(struct connectdata *conn, curl_socket_t *socks,
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| 136 | int numsocks);
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| 137 | static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
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| 138 | int numsocks);
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| 139 | static CURLcode ftp_doing(struct connectdata *conn,
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| 140 | bool *dophase_done);
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| 141 | static CURLcode ftp_setup_connection(struct connectdata * conn);
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| 142 |
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| 143 | static CURLcode init_wc_data(struct connectdata *conn);
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| 144 | static CURLcode wc_statemach(struct connectdata *conn);
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| 145 |
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| 146 | static void wc_data_dtor(void *ptr);
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| 147 |
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| 148 | static CURLcode ftp_state_retr(struct connectdata *conn, curl_off_t filesize);
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| 149 |
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| 150 | static CURLcode ftp_readresp(curl_socket_t sockfd,
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| 151 | struct pingpong *pp,
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| 152 | int *ftpcode,
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| 153 | size_t *size);
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| 154 | static CURLcode ftp_dophase_done(struct connectdata *conn,
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| 155 | bool connected);
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| 156 |
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| 157 | /* easy-to-use macro: */
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| 158 | #define PPSENDF(x,y,z) if((result = Curl_pp_sendf(x,y,z))) \
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| 159 | return result
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| 160 |
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| 161 |
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| 162 | /*
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| 163 | * FTP protocol handler.
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| 164 | */
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| 165 |
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| 166 | const struct Curl_handler Curl_handler_ftp = {
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| 167 | "FTP", /* scheme */
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| 168 | ftp_setup_connection, /* setup_connection */
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| 169 | ftp_do, /* do_it */
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| 170 | ftp_done, /* done */
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| 171 | ftp_do_more, /* do_more */
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| 172 | ftp_connect, /* connect_it */
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| 173 | ftp_multi_statemach, /* connecting */
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| 174 | ftp_doing, /* doing */
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| 175 | ftp_getsock, /* proto_getsock */
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| 176 | ftp_getsock, /* doing_getsock */
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| 177 | ftp_domore_getsock, /* domore_getsock */
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| 178 | ZERO_NULL, /* perform_getsock */
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| 179 | ftp_disconnect, /* disconnect */
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| 180 | ZERO_NULL, /* readwrite */
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| 181 | PORT_FTP, /* defport */
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| 182 | CURLPROTO_FTP, /* protocol */
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| 183 | PROTOPT_DUAL | PROTOPT_CLOSEACTION | PROTOPT_NEEDSPWD
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| 184 | | PROTOPT_NOURLQUERY /* flags */
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| 185 | };
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| 186 |
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| 187 |
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| 188 | #ifdef USE_SSL
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| 189 | /*
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| 190 | * FTPS protocol handler.
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| 191 | */
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| 192 |
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| 193 | const struct Curl_handler Curl_handler_ftps = {
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| 194 | "FTPS", /* scheme */
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| 195 | ftp_setup_connection, /* setup_connection */
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| 196 | ftp_do, /* do_it */
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| 197 | ftp_done, /* done */
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| 198 | ftp_do_more, /* do_more */
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| 199 | ftp_connect, /* connect_it */
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| 200 | ftp_multi_statemach, /* connecting */
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| 201 | ftp_doing, /* doing */
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| 202 | ftp_getsock, /* proto_getsock */
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| 203 | ftp_getsock, /* doing_getsock */
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| 204 | ftp_domore_getsock, /* domore_getsock */
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| 205 | ZERO_NULL, /* perform_getsock */
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| 206 | ftp_disconnect, /* disconnect */
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| 207 | ZERO_NULL, /* readwrite */
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| 208 | PORT_FTPS, /* defport */
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| 209 | CURLPROTO_FTPS, /* protocol */
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| 210 | PROTOPT_SSL | PROTOPT_DUAL | PROTOPT_CLOSEACTION |
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| 211 | PROTOPT_NEEDSPWD | PROTOPT_NOURLQUERY /* flags */
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| 212 | };
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| 213 | #endif
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| 214 |
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| 215 | #ifndef CURL_DISABLE_HTTP
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| 216 | /*
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| 217 | * HTTP-proxyed FTP protocol handler.
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| 218 | */
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| 219 |
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| 220 | static const struct Curl_handler Curl_handler_ftp_proxy = {
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| 221 | "FTP", /* scheme */
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| 222 | Curl_http_setup_conn, /* setup_connection */
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| 223 | Curl_http, /* do_it */
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| 224 | Curl_http_done, /* done */
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| 225 | ZERO_NULL, /* do_more */
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| 226 | ZERO_NULL, /* connect_it */
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| 227 | ZERO_NULL, /* connecting */
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| 228 | ZERO_NULL, /* doing */
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| 229 | ZERO_NULL, /* proto_getsock */
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| 230 | ZERO_NULL, /* doing_getsock */
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| 231 | ZERO_NULL, /* domore_getsock */
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| 232 | ZERO_NULL, /* perform_getsock */
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| 233 | ZERO_NULL, /* disconnect */
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| 234 | ZERO_NULL, /* readwrite */
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| 235 | PORT_FTP, /* defport */
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| 236 | CURLPROTO_HTTP, /* protocol */
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| 237 | PROTOPT_NONE /* flags */
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| 238 | };
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| 239 |
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| 240 |
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| 241 | #ifdef USE_SSL
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| 242 | /*
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| 243 | * HTTP-proxyed FTPS protocol handler.
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| 244 | */
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| 245 |
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| 246 | static const struct Curl_handler Curl_handler_ftps_proxy = {
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| 247 | "FTPS", /* scheme */
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| 248 | Curl_http_setup_conn, /* setup_connection */
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| 249 | Curl_http, /* do_it */
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| 250 | Curl_http_done, /* done */
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| 251 | ZERO_NULL, /* do_more */
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| 252 | ZERO_NULL, /* connect_it */
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| 253 | ZERO_NULL, /* connecting */
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| 254 | ZERO_NULL, /* doing */
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| 255 | ZERO_NULL, /* proto_getsock */
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| 256 | ZERO_NULL, /* doing_getsock */
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| 257 | ZERO_NULL, /* domore_getsock */
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| 258 | ZERO_NULL, /* perform_getsock */
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| 259 | ZERO_NULL, /* disconnect */
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| 260 | ZERO_NULL, /* readwrite */
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| 261 | PORT_FTPS, /* defport */
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| 262 | CURLPROTO_HTTP, /* protocol */
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| 263 | PROTOPT_NONE /* flags */
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| 264 | };
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| 265 | #endif
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| 266 | #endif
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| 267 |
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| 268 |
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| 269 | /*
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| 270 | * NOTE: back in the old days, we added code in the FTP code that made NOBODY
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| 271 | * requests on files respond with headers passed to the client/stdout that
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| 272 | * looked like HTTP ones.
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| 273 | *
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| 274 | * This approach is not very elegant, it causes confusion and is error-prone.
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| 275 | * It is subject for removal at the next (or at least a future) soname bump.
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| 276 | * Until then you can test the effects of the removal by undefining the
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| 277 | * following define named CURL_FTP_HTTPSTYLE_HEAD.
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| 278 | */
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| 279 | #define CURL_FTP_HTTPSTYLE_HEAD 1
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| 280 |
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| 281 | static void freedirs(struct ftp_conn *ftpc)
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| 282 | {
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| 283 | int i;
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| 284 | if(ftpc->dirs) {
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| 285 | for(i=0; i < ftpc->dirdepth; i++) {
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| 286 | free(ftpc->dirs[i]);
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| 287 | ftpc->dirs[i]=NULL;
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| 288 | }
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| 289 | free(ftpc->dirs);
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| 290 | ftpc->dirs = NULL;
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| 291 | ftpc->dirdepth = 0;
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| 292 | }
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| 293 | Curl_safefree(ftpc->file);
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| 294 |
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| 295 | /* no longer of any use */
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| 296 | Curl_safefree(ftpc->newhost);
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| 297 | }
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| 298 |
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| 299 | /* Returns non-zero if the given string contains CR (\r) or LF (\n),
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| 300 | which are not allowed within RFC 959 <string>.
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| 301 | Note: The input string is in the client's encoding which might
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| 302 | not be ASCII, so escape sequences \r & \n must be used instead
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| 303 | of hex values 0x0d & 0x0a.
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| 304 | */
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| 305 | static bool isBadFtpString(const char *string)
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| 306 | {
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| 307 | return ((NULL != strchr(string, '\r')) ||
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| 308 | (NULL != strchr(string, '\n'))) ? TRUE : FALSE;
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| 309 | }
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| 310 |
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| 311 | /***********************************************************************
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| 312 | *
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| 313 | * AcceptServerConnect()
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| 314 | *
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| 315 | * After connection request is received from the server this function is
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| 316 | * called to accept the connection and close the listening socket
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| 317 | *
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| 318 | */
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| 319 | static CURLcode AcceptServerConnect(struct connectdata *conn)
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| 320 | {
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| 321 | struct SessionHandle *data = conn->data;
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| 322 | curl_socket_t sock = conn->sock[SECONDARYSOCKET];
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| 323 | curl_socket_t s = CURL_SOCKET_BAD;
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| 324 | #ifdef ENABLE_IPV6
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| 325 | struct Curl_sockaddr_storage add;
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| 326 | #else
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| 327 | struct sockaddr_in add;
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| 328 | #endif
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| 329 | curl_socklen_t size = (curl_socklen_t) sizeof(add);
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| 330 |
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| 331 | if(0 == getsockname(sock, (struct sockaddr *) &add, &size)) {
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| 332 | size = sizeof(add);
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| 333 |
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| 334 | s=accept(sock, (struct sockaddr *) &add, &size);
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| 335 | }
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| 336 | Curl_closesocket(conn, sock); /* close the first socket */
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| 337 |
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| 338 | if(CURL_SOCKET_BAD == s) {
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| 339 | failf(data, "Error accept()ing server connect");
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| 340 | return CURLE_FTP_PORT_FAILED;
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| 341 | }
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| 342 | infof(data, "Connection accepted from server\n");
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| 343 | /* when this happens within the DO state it is important that we mark us as
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| 344 | not needing DO_MORE anymore */
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| 345 | conn->bits.do_more = FALSE;
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| 346 |
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| 347 | conn->sock[SECONDARYSOCKET] = s;
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| 348 | (void)curlx_nonblock(s, TRUE); /* enable non-blocking */
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| 349 | conn->sock_accepted[SECONDARYSOCKET] = TRUE;
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| 350 |
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| 351 | if(data->set.fsockopt) {
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| 352 | int error = 0;
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| 353 |
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| 354 | /* activate callback for setting socket options */
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| 355 | error = data->set.fsockopt(data->set.sockopt_client,
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| 356 | s,
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| 357 | CURLSOCKTYPE_ACCEPT);
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| 358 |
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| 359 | if(error) {
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| 360 | Curl_closesocket(conn, s); /* close the socket and bail out */
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| 361 | conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
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| 362 | return CURLE_ABORTED_BY_CALLBACK;
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| 363 | }
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| 364 | }
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| 365 |
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| 366 | return CURLE_OK;
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| 367 |
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| 368 | }
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| 369 |
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| 370 | /*
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| 371 | * ftp_timeleft_accept() returns the amount of milliseconds left allowed for
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| 372 | * waiting server to connect. If the value is negative, the timeout time has
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| 373 | * already elapsed.
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| 374 | *
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| 375 | * The start time is stored in progress.t_acceptdata - as set with
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| 376 | * Curl_pgrsTime(..., TIMER_STARTACCEPT);
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| 377 | *
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| 378 | */
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| 379 | static long ftp_timeleft_accept(struct SessionHandle *data)
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| 380 | {
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| 381 | long timeout_ms = DEFAULT_ACCEPT_TIMEOUT;
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| 382 | long other;
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| 383 | struct timeval now;
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| 384 |
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| 385 | if(data->set.accepttimeout > 0)
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| 386 | timeout_ms = data->set.accepttimeout;
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| 387 |
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| 388 | now = Curl_tvnow();
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| 389 |
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| 390 | /* check if the generic timeout possibly is set shorter */
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| 391 | other = Curl_timeleft(data, &now, FALSE);
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| 392 | if(other && (other < timeout_ms))
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| 393 | /* note that this also works fine for when other happens to be negative
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| 394 | due to it already having elapsed */
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| 395 | timeout_ms = other;
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| 396 | else {
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| 397 | /* subtract elapsed time */
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| 398 | timeout_ms -= Curl_tvdiff(now, data->progress.t_acceptdata);
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| 399 | if(!timeout_ms)
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| 400 | /* avoid returning 0 as that means no timeout! */
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| 401 | return -1;
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| 402 | }
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| 403 |
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| 404 | return timeout_ms;
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| 405 | }
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| 406 |
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| 407 |
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| 408 | /***********************************************************************
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| 409 | *
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| 410 | * ReceivedServerConnect()
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| 411 | *
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| 412 | * After allowing server to connect to us from data port, this function
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| 413 | * checks both data connection for connection establishment and ctrl
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| 414 | * connection for a negative response regarding a failure in connecting
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| 415 | *
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| 416 | */
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| 417 | static CURLcode ReceivedServerConnect(struct connectdata *conn, bool *received)
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| 418 | {
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| 419 | struct SessionHandle *data = conn->data;
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| 420 | curl_socket_t ctrl_sock = conn->sock[FIRSTSOCKET];
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| 421 | curl_socket_t data_sock = conn->sock[SECONDARYSOCKET];
|
---|
| 422 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 423 | struct pingpong *pp = &ftpc->pp;
|
---|
| 424 | int result;
|
---|
| 425 | long timeout_ms;
|
---|
| 426 | ssize_t nread;
|
---|
| 427 | int ftpcode;
|
---|
| 428 |
|
---|
| 429 | *received = FALSE;
|
---|
| 430 |
|
---|
| 431 | timeout_ms = ftp_timeleft_accept(data);
|
---|
| 432 | infof(data, "Checking for server connect\n");
|
---|
| 433 | if(timeout_ms < 0) {
|
---|
| 434 | /* if a timeout was already reached, bail out */
|
---|
| 435 | failf(data, "Accept timeout occurred while waiting server connect");
|
---|
| 436 | return CURLE_FTP_ACCEPT_TIMEOUT;
|
---|
| 437 | }
|
---|
| 438 |
|
---|
| 439 | /* First check whether there is a cached response from server */
|
---|
| 440 | if(pp->cache_size && pp->cache && pp->cache[0] > '3') {
|
---|
| 441 | /* Data connection could not be established, let's return */
|
---|
| 442 | infof(data, "There is negative response in cache while serv connect\n");
|
---|
| 443 | Curl_GetFTPResponse(&nread, conn, &ftpcode);
|
---|
| 444 | return CURLE_FTP_ACCEPT_FAILED;
|
---|
| 445 | }
|
---|
| 446 |
|
---|
| 447 | result = Curl_socket_check(ctrl_sock, data_sock, CURL_SOCKET_BAD, 0);
|
---|
| 448 |
|
---|
| 449 | /* see if the connection request is already here */
|
---|
| 450 | switch (result) {
|
---|
| 451 | case -1: /* error */
|
---|
| 452 | /* let's die here */
|
---|
| 453 | failf(data, "Error while waiting for server connect");
|
---|
| 454 | return CURLE_FTP_ACCEPT_FAILED;
|
---|
| 455 | case 0: /* Server connect is not received yet */
|
---|
| 456 | break; /* loop */
|
---|
| 457 | default:
|
---|
| 458 |
|
---|
| 459 | if(result & CURL_CSELECT_IN2) {
|
---|
| 460 | infof(data, "Ready to accept data connection from server\n");
|
---|
| 461 | *received = TRUE;
|
---|
| 462 | }
|
---|
| 463 | else if(result & CURL_CSELECT_IN) {
|
---|
| 464 | infof(data, "Ctrl conn has data while waiting for data conn\n");
|
---|
| 465 | Curl_GetFTPResponse(&nread, conn, &ftpcode);
|
---|
| 466 |
|
---|
| 467 | if(ftpcode/100 > 3)
|
---|
| 468 | return CURLE_FTP_ACCEPT_FAILED;
|
---|
| 469 |
|
---|
| 470 | return CURLE_FTP_WEIRD_SERVER_REPLY;
|
---|
| 471 | }
|
---|
| 472 |
|
---|
| 473 | break;
|
---|
| 474 | } /* switch() */
|
---|
| 475 |
|
---|
| 476 | return CURLE_OK;
|
---|
| 477 | }
|
---|
| 478 |
|
---|
| 479 |
|
---|
| 480 | /***********************************************************************
|
---|
| 481 | *
|
---|
| 482 | * InitiateTransfer()
|
---|
| 483 | *
|
---|
| 484 | * After connection from server is accepted this function is called to
|
---|
| 485 | * setup transfer parameters and initiate the data transfer.
|
---|
| 486 | *
|
---|
| 487 | */
|
---|
| 488 | static CURLcode InitiateTransfer(struct connectdata *conn)
|
---|
| 489 | {
|
---|
| 490 | struct SessionHandle *data = conn->data;
|
---|
| 491 | struct FTP *ftp = data->req.protop;
|
---|
| 492 | CURLcode result = CURLE_OK;
|
---|
| 493 |
|
---|
| 494 | if(conn->ssl[SECONDARYSOCKET].use) {
|
---|
| 495 | /* since we only have a plaintext TCP connection here, we must now
|
---|
| 496 | * do the TLS stuff */
|
---|
| 497 | infof(data, "Doing the SSL/TLS handshake on the data stream\n");
|
---|
| 498 | result = Curl_ssl_connect(conn, SECONDARYSOCKET);
|
---|
| 499 | if(result)
|
---|
| 500 | return result;
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | if(conn->proto.ftpc.state_saved == FTP_STOR) {
|
---|
| 504 | *(ftp->bytecountp)=0;
|
---|
| 505 |
|
---|
| 506 | /* When we know we're uploading a specified file, we can get the file
|
---|
| 507 | size prior to the actual upload. */
|
---|
| 508 |
|
---|
| 509 | Curl_pgrsSetUploadSize(data, data->state.infilesize);
|
---|
| 510 |
|
---|
| 511 | /* set the SO_SNDBUF for the secondary socket for those who need it */
|
---|
| 512 | Curl_sndbufset(conn->sock[SECONDARYSOCKET]);
|
---|
| 513 |
|
---|
| 514 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, /* no download */
|
---|
| 515 | SECONDARYSOCKET, ftp->bytecountp);
|
---|
| 516 | }
|
---|
| 517 | else {
|
---|
| 518 | /* FTP download: */
|
---|
| 519 | Curl_setup_transfer(conn, SECONDARYSOCKET,
|
---|
| 520 | conn->proto.ftpc.retr_size_saved, FALSE,
|
---|
| 521 | ftp->bytecountp, -1, NULL); /* no upload here */
|
---|
| 522 | }
|
---|
| 523 |
|
---|
| 524 | conn->proto.ftpc.pp.pending_resp = TRUE; /* expect server response */
|
---|
| 525 | state(conn, FTP_STOP);
|
---|
| 526 |
|
---|
| 527 | return CURLE_OK;
|
---|
| 528 | }
|
---|
| 529 |
|
---|
| 530 | /***********************************************************************
|
---|
| 531 | *
|
---|
| 532 | * AllowServerConnect()
|
---|
| 533 | *
|
---|
| 534 | * When we've issue the PORT command, we have told the server to connect to
|
---|
| 535 | * us. This function checks whether data connection is established if so it is
|
---|
| 536 | * accepted.
|
---|
| 537 | *
|
---|
| 538 | */
|
---|
| 539 | static CURLcode AllowServerConnect(struct connectdata *conn, bool *connected)
|
---|
| 540 | {
|
---|
| 541 | struct SessionHandle *data = conn->data;
|
---|
| 542 | long timeout_ms;
|
---|
| 543 | CURLcode result = CURLE_OK;
|
---|
| 544 |
|
---|
| 545 | *connected = FALSE;
|
---|
| 546 | infof(data, "Preparing for accepting server on data port\n");
|
---|
| 547 |
|
---|
| 548 | /* Save the time we start accepting server connect */
|
---|
| 549 | Curl_pgrsTime(data, TIMER_STARTACCEPT);
|
---|
| 550 |
|
---|
| 551 | timeout_ms = ftp_timeleft_accept(data);
|
---|
| 552 | if(timeout_ms < 0) {
|
---|
| 553 | /* if a timeout was already reached, bail out */
|
---|
| 554 | failf(data, "Accept timeout occurred while waiting server connect");
|
---|
| 555 | return CURLE_FTP_ACCEPT_TIMEOUT;
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | /* see if the connection request is already here */
|
---|
| 559 | result = ReceivedServerConnect(conn, connected);
|
---|
| 560 | if(result)
|
---|
| 561 | return result;
|
---|
| 562 |
|
---|
| 563 | if(*connected) {
|
---|
| 564 | result = AcceptServerConnect(conn);
|
---|
| 565 | if(result)
|
---|
| 566 | return result;
|
---|
| 567 |
|
---|
| 568 | result = InitiateTransfer(conn);
|
---|
| 569 | if(result)
|
---|
| 570 | return result;
|
---|
| 571 | }
|
---|
| 572 | else {
|
---|
| 573 | /* Add timeout to multi handle and break out of the loop */
|
---|
| 574 | if(!result && *connected == FALSE) {
|
---|
| 575 | if(data->set.accepttimeout > 0)
|
---|
| 576 | Curl_expire(data, data->set.accepttimeout);
|
---|
| 577 | else
|
---|
| 578 | Curl_expire(data, DEFAULT_ACCEPT_TIMEOUT);
|
---|
| 579 | }
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | return result;
|
---|
| 583 | }
|
---|
| 584 |
|
---|
| 585 | /* macro to check for a three-digit ftp status code at the start of the
|
---|
| 586 | given string */
|
---|
| 587 | #define STATUSCODE(line) (ISDIGIT(line[0]) && ISDIGIT(line[1]) && \
|
---|
| 588 | ISDIGIT(line[2]))
|
---|
| 589 |
|
---|
| 590 | /* macro to check for the last line in an FTP server response */
|
---|
| 591 | #define LASTLINE(line) (STATUSCODE(line) && (' ' == line[3]))
|
---|
| 592 |
|
---|
| 593 | static bool ftp_endofresp(struct connectdata *conn, char *line, size_t len,
|
---|
| 594 | int *code)
|
---|
| 595 | {
|
---|
| 596 | (void)conn;
|
---|
| 597 |
|
---|
| 598 | if((len > 3) && LASTLINE(line)) {
|
---|
| 599 | *code = curlx_sltosi(strtol(line, NULL, 10));
|
---|
| 600 | return TRUE;
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 | return FALSE;
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 | static CURLcode ftp_readresp(curl_socket_t sockfd,
|
---|
| 607 | struct pingpong *pp,
|
---|
| 608 | int *ftpcode, /* return the ftp-code if done */
|
---|
| 609 | size_t *size) /* size of the response */
|
---|
| 610 | {
|
---|
| 611 | struct connectdata *conn = pp->conn;
|
---|
| 612 | struct SessionHandle *data = conn->data;
|
---|
| 613 | #ifdef HAVE_GSSAPI
|
---|
| 614 | char * const buf = data->state.buffer;
|
---|
| 615 | #endif
|
---|
| 616 | CURLcode result = CURLE_OK;
|
---|
| 617 | int code;
|
---|
| 618 |
|
---|
| 619 | result = Curl_pp_readresp(sockfd, pp, &code, size);
|
---|
| 620 |
|
---|
| 621 | #if defined(HAVE_GSSAPI)
|
---|
| 622 | /* handle the security-oriented responses 6xx ***/
|
---|
| 623 | /* FIXME: some errorchecking perhaps... ***/
|
---|
| 624 | switch(code) {
|
---|
| 625 | case 631:
|
---|
| 626 | code = Curl_sec_read_msg(conn, buf, PROT_SAFE);
|
---|
| 627 | break;
|
---|
| 628 | case 632:
|
---|
| 629 | code = Curl_sec_read_msg(conn, buf, PROT_PRIVATE);
|
---|
| 630 | break;
|
---|
| 631 | case 633:
|
---|
| 632 | code = Curl_sec_read_msg(conn, buf, PROT_CONFIDENTIAL);
|
---|
| 633 | break;
|
---|
| 634 | default:
|
---|
| 635 | /* normal ftp stuff we pass through! */
|
---|
| 636 | break;
|
---|
| 637 | }
|
---|
| 638 | #endif
|
---|
| 639 |
|
---|
| 640 | /* store the latest code for later retrieval */
|
---|
| 641 | data->info.httpcode=code;
|
---|
| 642 |
|
---|
| 643 | if(ftpcode)
|
---|
| 644 | *ftpcode = code;
|
---|
| 645 |
|
---|
| 646 | if(421 == code) {
|
---|
| 647 | /* 421 means "Service not available, closing control connection." and FTP
|
---|
| 648 | * servers use it to signal that idle session timeout has been exceeded.
|
---|
| 649 | * If we ignored the response, it could end up hanging in some cases.
|
---|
| 650 | *
|
---|
| 651 | * This response code can come at any point so having it treated
|
---|
| 652 | * generically is a good idea.
|
---|
| 653 | */
|
---|
| 654 | infof(data, "We got a 421 - timeout!\n");
|
---|
| 655 | state(conn, FTP_STOP);
|
---|
| 656 | return CURLE_OPERATION_TIMEDOUT;
|
---|
| 657 | }
|
---|
| 658 |
|
---|
| 659 | return result;
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | /* --- parse FTP server responses --- */
|
---|
| 663 |
|
---|
| 664 | /*
|
---|
| 665 | * Curl_GetFTPResponse() is a BLOCKING function to read the full response
|
---|
| 666 | * from a server after a command.
|
---|
| 667 | *
|
---|
| 668 | */
|
---|
| 669 |
|
---|
| 670 | CURLcode Curl_GetFTPResponse(ssize_t *nreadp, /* return number of bytes read */
|
---|
| 671 | struct connectdata *conn,
|
---|
| 672 | int *ftpcode) /* return the ftp-code */
|
---|
| 673 | {
|
---|
| 674 | /*
|
---|
| 675 | * We cannot read just one byte per read() and then go back to select() as
|
---|
| 676 | * the OpenSSL read() doesn't grok that properly.
|
---|
| 677 | *
|
---|
| 678 | * Alas, read as much as possible, split up into lines, use the ending
|
---|
| 679 | * line in a response or continue reading. */
|
---|
| 680 |
|
---|
| 681 | curl_socket_t sockfd = conn->sock[FIRSTSOCKET];
|
---|
| 682 | long timeout; /* timeout in milliseconds */
|
---|
| 683 | long interval_ms;
|
---|
| 684 | struct SessionHandle *data = conn->data;
|
---|
| 685 | CURLcode result = CURLE_OK;
|
---|
| 686 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 687 | struct pingpong *pp = &ftpc->pp;
|
---|
| 688 | size_t nread;
|
---|
| 689 | int cache_skip=0;
|
---|
| 690 | int value_to_be_ignored=0;
|
---|
| 691 |
|
---|
| 692 | if(ftpcode)
|
---|
| 693 | *ftpcode = 0; /* 0 for errors */
|
---|
| 694 | else
|
---|
| 695 | /* make the pointer point to something for the rest of this function */
|
---|
| 696 | ftpcode = &value_to_be_ignored;
|
---|
| 697 |
|
---|
| 698 | *nreadp=0;
|
---|
| 699 |
|
---|
| 700 | while(!*ftpcode && !result) {
|
---|
| 701 | /* check and reset timeout value every lap */
|
---|
| 702 | timeout = Curl_pp_state_timeout(pp);
|
---|
| 703 |
|
---|
| 704 | if(timeout <=0 ) {
|
---|
| 705 | failf(data, "FTP response timeout");
|
---|
| 706 | return CURLE_OPERATION_TIMEDOUT; /* already too little time */
|
---|
| 707 | }
|
---|
| 708 |
|
---|
| 709 | interval_ms = 1000; /* use 1 second timeout intervals */
|
---|
| 710 | if(timeout < interval_ms)
|
---|
| 711 | interval_ms = timeout;
|
---|
| 712 |
|
---|
| 713 | /*
|
---|
| 714 | * Since this function is blocking, we need to wait here for input on the
|
---|
| 715 | * connection and only then we call the response reading function. We do
|
---|
| 716 | * timeout at least every second to make the timeout check run.
|
---|
| 717 | *
|
---|
| 718 | * A caution here is that the ftp_readresp() function has a cache that may
|
---|
| 719 | * contain pieces of a response from the previous invoke and we need to
|
---|
| 720 | * make sure we don't just wait for input while there is unhandled data in
|
---|
| 721 | * that cache. But also, if the cache is there, we call ftp_readresp() and
|
---|
| 722 | * the cache wasn't good enough to continue we must not just busy-loop
|
---|
| 723 | * around this function.
|
---|
| 724 | *
|
---|
| 725 | */
|
---|
| 726 |
|
---|
| 727 | if(pp->cache && (cache_skip < 2)) {
|
---|
| 728 | /*
|
---|
| 729 | * There's a cache left since before. We then skipping the wait for
|
---|
| 730 | * socket action, unless this is the same cache like the previous round
|
---|
| 731 | * as then the cache was deemed not enough to act on and we then need to
|
---|
| 732 | * wait for more data anyway.
|
---|
| 733 | */
|
---|
| 734 | }
|
---|
| 735 | else {
|
---|
| 736 | switch (Curl_socket_ready(sockfd, CURL_SOCKET_BAD, interval_ms)) {
|
---|
| 737 | case -1: /* select() error, stop reading */
|
---|
| 738 | failf(data, "FTP response aborted due to select/poll error: %d",
|
---|
| 739 | SOCKERRNO);
|
---|
| 740 | return CURLE_RECV_ERROR;
|
---|
| 741 |
|
---|
| 742 | case 0: /* timeout */
|
---|
| 743 | if(Curl_pgrsUpdate(conn))
|
---|
| 744 | return CURLE_ABORTED_BY_CALLBACK;
|
---|
| 745 | continue; /* just continue in our loop for the timeout duration */
|
---|
| 746 |
|
---|
| 747 | default: /* for clarity */
|
---|
| 748 | break;
|
---|
| 749 | }
|
---|
| 750 | }
|
---|
| 751 | result = ftp_readresp(sockfd, pp, ftpcode, &nread);
|
---|
| 752 | if(result)
|
---|
| 753 | break;
|
---|
| 754 |
|
---|
| 755 | if(!nread && pp->cache)
|
---|
| 756 | /* bump cache skip counter as on repeated skips we must wait for more
|
---|
| 757 | data */
|
---|
| 758 | cache_skip++;
|
---|
| 759 | else
|
---|
| 760 | /* when we got data or there is no cache left, we reset the cache skip
|
---|
| 761 | counter */
|
---|
| 762 | cache_skip=0;
|
---|
| 763 |
|
---|
| 764 | *nreadp += nread;
|
---|
| 765 |
|
---|
| 766 | } /* while there's buffer left and loop is requested */
|
---|
| 767 |
|
---|
| 768 | pp->pending_resp = FALSE;
|
---|
| 769 |
|
---|
| 770 | return result;
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 | #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
| 774 | /* for debug purposes */
|
---|
| 775 | static const char * const ftp_state_names[]={
|
---|
| 776 | "STOP",
|
---|
| 777 | "WAIT220",
|
---|
| 778 | "AUTH",
|
---|
| 779 | "USER",
|
---|
| 780 | "PASS",
|
---|
| 781 | "ACCT",
|
---|
| 782 | "PBSZ",
|
---|
| 783 | "PROT",
|
---|
| 784 | "CCC",
|
---|
| 785 | "PWD",
|
---|
| 786 | "SYST",
|
---|
| 787 | "NAMEFMT",
|
---|
| 788 | "QUOTE",
|
---|
| 789 | "RETR_PREQUOTE",
|
---|
| 790 | "STOR_PREQUOTE",
|
---|
| 791 | "POSTQUOTE",
|
---|
| 792 | "CWD",
|
---|
| 793 | "MKD",
|
---|
| 794 | "MDTM",
|
---|
| 795 | "TYPE",
|
---|
| 796 | "LIST_TYPE",
|
---|
| 797 | "RETR_TYPE",
|
---|
| 798 | "STOR_TYPE",
|
---|
| 799 | "SIZE",
|
---|
| 800 | "RETR_SIZE",
|
---|
| 801 | "STOR_SIZE",
|
---|
| 802 | "REST",
|
---|
| 803 | "RETR_REST",
|
---|
| 804 | "PORT",
|
---|
| 805 | "PRET",
|
---|
| 806 | "PASV",
|
---|
| 807 | "LIST",
|
---|
| 808 | "RETR",
|
---|
| 809 | "STOR",
|
---|
| 810 | "QUIT"
|
---|
| 811 | };
|
---|
| 812 | #endif
|
---|
| 813 |
|
---|
| 814 | /* This is the ONLY way to change FTP state! */
|
---|
| 815 | static void _state(struct connectdata *conn,
|
---|
| 816 | ftpstate newstate
|
---|
| 817 | #ifdef DEBUGBUILD
|
---|
| 818 | , int lineno
|
---|
| 819 | #endif
|
---|
| 820 | )
|
---|
| 821 | {
|
---|
| 822 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 823 |
|
---|
| 824 | #if defined(DEBUGBUILD)
|
---|
| 825 |
|
---|
| 826 | #if defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
| 827 | (void) lineno;
|
---|
| 828 | #else
|
---|
| 829 | if(ftpc->state != newstate)
|
---|
| 830 | infof(conn->data, "FTP %p (line %d) state change from %s to %s\n",
|
---|
| 831 | (void *)ftpc, lineno, ftp_state_names[ftpc->state],
|
---|
| 832 | ftp_state_names[newstate]);
|
---|
| 833 | #endif
|
---|
| 834 | #endif
|
---|
| 835 |
|
---|
| 836 | ftpc->state = newstate;
|
---|
| 837 | }
|
---|
| 838 |
|
---|
| 839 | static CURLcode ftp_state_user(struct connectdata *conn)
|
---|
| 840 | {
|
---|
| 841 | CURLcode result;
|
---|
| 842 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 843 | /* send USER */
|
---|
| 844 | PPSENDF(&conn->proto.ftpc.pp, "USER %s", ftp->user?ftp->user:"");
|
---|
| 845 |
|
---|
| 846 | state(conn, FTP_USER);
|
---|
| 847 | conn->data->state.ftp_trying_alternative = FALSE;
|
---|
| 848 |
|
---|
| 849 | return CURLE_OK;
|
---|
| 850 | }
|
---|
| 851 |
|
---|
| 852 | static CURLcode ftp_state_pwd(struct connectdata *conn)
|
---|
| 853 | {
|
---|
| 854 | CURLcode result;
|
---|
| 855 |
|
---|
| 856 | /* send PWD to discover our entry point */
|
---|
| 857 | PPSENDF(&conn->proto.ftpc.pp, "%s", "PWD");
|
---|
| 858 | state(conn, FTP_PWD);
|
---|
| 859 |
|
---|
| 860 | return CURLE_OK;
|
---|
| 861 | }
|
---|
| 862 |
|
---|
| 863 | /* For the FTP "protocol connect" and "doing" phases only */
|
---|
| 864 | static int ftp_getsock(struct connectdata *conn,
|
---|
| 865 | curl_socket_t *socks,
|
---|
| 866 | int numsocks)
|
---|
| 867 | {
|
---|
| 868 | return Curl_pp_getsock(&conn->proto.ftpc.pp, socks, numsocks);
|
---|
| 869 | }
|
---|
| 870 |
|
---|
| 871 | /* For the FTP "DO_MORE" phase only */
|
---|
| 872 | static int ftp_domore_getsock(struct connectdata *conn, curl_socket_t *socks,
|
---|
| 873 | int numsocks)
|
---|
| 874 | {
|
---|
| 875 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 876 |
|
---|
| 877 | if(!numsocks)
|
---|
| 878 | return GETSOCK_BLANK;
|
---|
| 879 |
|
---|
| 880 | /* When in DO_MORE state, we could be either waiting for us to connect to a
|
---|
| 881 | * remote site, or we could wait for that site to connect to us. Or just
|
---|
| 882 | * handle ordinary commands.
|
---|
| 883 | */
|
---|
| 884 |
|
---|
| 885 | if(FTP_STOP == ftpc->state) {
|
---|
| 886 | int bits = GETSOCK_READSOCK(0);
|
---|
| 887 |
|
---|
| 888 | /* if stopped and still in this state, then we're also waiting for a
|
---|
| 889 | connect on the secondary connection */
|
---|
| 890 | socks[0] = conn->sock[FIRSTSOCKET];
|
---|
| 891 |
|
---|
| 892 | if(!conn->data->set.ftp_use_port) {
|
---|
| 893 | int s;
|
---|
| 894 | int i;
|
---|
| 895 | /* PORT is used to tell the server to connect to us, and during that we
|
---|
| 896 | don't do happy eyeballs, but we do if we connect to the server */
|
---|
| 897 | for(s=1, i=0; i<2; i++) {
|
---|
| 898 | if(conn->tempsock[i] != CURL_SOCKET_BAD) {
|
---|
| 899 | socks[s] = conn->tempsock[i];
|
---|
| 900 | bits |= GETSOCK_WRITESOCK(s++);
|
---|
| 901 | }
|
---|
| 902 | }
|
---|
| 903 | }
|
---|
| 904 | else {
|
---|
| 905 | socks[1] = conn->sock[SECONDARYSOCKET];
|
---|
| 906 | bits |= GETSOCK_WRITESOCK(1);
|
---|
| 907 | }
|
---|
| 908 |
|
---|
| 909 | return bits;
|
---|
| 910 | }
|
---|
| 911 | else
|
---|
| 912 | return Curl_pp_getsock(&conn->proto.ftpc.pp, socks, numsocks);
|
---|
| 913 | }
|
---|
| 914 |
|
---|
| 915 | /* This is called after the FTP_QUOTE state is passed.
|
---|
| 916 |
|
---|
| 917 | ftp_state_cwd() sends the range of CWD commands to the server to change to
|
---|
| 918 | the correct directory. It may also need to send MKD commands to create
|
---|
| 919 | missing ones, if that option is enabled.
|
---|
| 920 | */
|
---|
| 921 | static CURLcode ftp_state_cwd(struct connectdata *conn)
|
---|
| 922 | {
|
---|
| 923 | CURLcode result = CURLE_OK;
|
---|
| 924 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 925 |
|
---|
| 926 | if(ftpc->cwddone)
|
---|
| 927 | /* already done and fine */
|
---|
| 928 | result = ftp_state_mdtm(conn);
|
---|
| 929 | else {
|
---|
| 930 | ftpc->count2 = 0; /* count2 counts failed CWDs */
|
---|
| 931 |
|
---|
| 932 | /* count3 is set to allow a MKD to fail once. In the case when first CWD
|
---|
| 933 | fails and then MKD fails (due to another session raced it to create the
|
---|
| 934 | dir) this then allows for a second try to CWD to it */
|
---|
| 935 | ftpc->count3 = (conn->data->set.ftp_create_missing_dirs==2)?1:0;
|
---|
| 936 |
|
---|
| 937 | if(conn->bits.reuse && ftpc->entrypath) {
|
---|
| 938 | /* This is a re-used connection. Since we change directory to where the
|
---|
| 939 | transfer is taking place, we must first get back to the original dir
|
---|
| 940 | where we ended up after login: */
|
---|
| 941 | ftpc->count1 = 0; /* we count this as the first path, then we add one
|
---|
| 942 | for all upcoming ones in the ftp->dirs[] array */
|
---|
| 943 | PPSENDF(&conn->proto.ftpc.pp, "CWD %s", ftpc->entrypath);
|
---|
| 944 | state(conn, FTP_CWD);
|
---|
| 945 | }
|
---|
| 946 | else {
|
---|
| 947 | if(ftpc->dirdepth) {
|
---|
| 948 | ftpc->count1 = 1;
|
---|
| 949 | /* issue the first CWD, the rest is sent when the CWD responses are
|
---|
| 950 | received... */
|
---|
| 951 | PPSENDF(&conn->proto.ftpc.pp, "CWD %s", ftpc->dirs[ftpc->count1 -1]);
|
---|
| 952 | state(conn, FTP_CWD);
|
---|
| 953 | }
|
---|
| 954 | else {
|
---|
| 955 | /* No CWD necessary */
|
---|
| 956 | result = ftp_state_mdtm(conn);
|
---|
| 957 | }
|
---|
| 958 | }
|
---|
| 959 | }
|
---|
| 960 | return result;
|
---|
| 961 | }
|
---|
| 962 |
|
---|
| 963 | typedef enum {
|
---|
| 964 | EPRT,
|
---|
| 965 | PORT,
|
---|
| 966 | DONE
|
---|
| 967 | } ftpport;
|
---|
| 968 |
|
---|
| 969 | static CURLcode ftp_state_use_port(struct connectdata *conn,
|
---|
| 970 | ftpport fcmd) /* start with this */
|
---|
| 971 |
|
---|
| 972 | {
|
---|
| 973 | CURLcode result = CURLE_OK;
|
---|
| 974 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 975 | struct SessionHandle *data=conn->data;
|
---|
| 976 | curl_socket_t portsock= CURL_SOCKET_BAD;
|
---|
| 977 | char myhost[256] = "";
|
---|
| 978 |
|
---|
| 979 | struct Curl_sockaddr_storage ss;
|
---|
| 980 | Curl_addrinfo *res, *ai;
|
---|
| 981 | curl_socklen_t sslen;
|
---|
| 982 | char hbuf[NI_MAXHOST];
|
---|
| 983 | struct sockaddr *sa=(struct sockaddr *)&ss;
|
---|
| 984 | struct sockaddr_in * const sa4 = (void *)sa;
|
---|
| 985 | #ifdef ENABLE_IPV6
|
---|
| 986 | struct sockaddr_in6 * const sa6 = (void *)sa;
|
---|
| 987 | #endif
|
---|
| 988 | char tmp[1024];
|
---|
| 989 | static const char mode[][5] = { "EPRT", "PORT" };
|
---|
| 990 | int rc;
|
---|
| 991 | int error;
|
---|
| 992 | char *host = NULL;
|
---|
| 993 | char *string_ftpport = data->set.str[STRING_FTPPORT];
|
---|
| 994 | struct Curl_dns_entry *h=NULL;
|
---|
| 995 | unsigned short port_min = 0;
|
---|
| 996 | unsigned short port_max = 0;
|
---|
| 997 | unsigned short port;
|
---|
| 998 | bool possibly_non_local = TRUE;
|
---|
| 999 |
|
---|
| 1000 | char *addr = NULL;
|
---|
| 1001 |
|
---|
| 1002 | /* Step 1, figure out what is requested,
|
---|
| 1003 | * accepted format :
|
---|
| 1004 | * (ipv4|ipv6|domain|interface)?(:port(-range)?)?
|
---|
| 1005 | */
|
---|
| 1006 |
|
---|
| 1007 | if(data->set.str[STRING_FTPPORT] &&
|
---|
| 1008 | (strlen(data->set.str[STRING_FTPPORT]) > 1)) {
|
---|
| 1009 |
|
---|
| 1010 | #ifdef ENABLE_IPV6
|
---|
| 1011 | size_t addrlen = INET6_ADDRSTRLEN > strlen(string_ftpport) ?
|
---|
| 1012 | INET6_ADDRSTRLEN : strlen(string_ftpport);
|
---|
| 1013 | #else
|
---|
| 1014 | size_t addrlen = INET_ADDRSTRLEN > strlen(string_ftpport) ?
|
---|
| 1015 | INET_ADDRSTRLEN : strlen(string_ftpport);
|
---|
| 1016 | #endif
|
---|
| 1017 | char *ip_start = string_ftpport;
|
---|
| 1018 | char *ip_end = NULL;
|
---|
| 1019 | char *port_start = NULL;
|
---|
| 1020 | char *port_sep = NULL;
|
---|
| 1021 |
|
---|
| 1022 | addr = calloc(addrlen+1, 1);
|
---|
| 1023 | if(!addr)
|
---|
| 1024 | return CURLE_OUT_OF_MEMORY;
|
---|
| 1025 |
|
---|
| 1026 | #ifdef ENABLE_IPV6
|
---|
| 1027 | if(*string_ftpport == '[') {
|
---|
| 1028 | /* [ipv6]:port(-range) */
|
---|
| 1029 | ip_start = string_ftpport + 1;
|
---|
| 1030 | if((ip_end = strchr(string_ftpport, ']')) != NULL )
|
---|
| 1031 | strncpy(addr, ip_start, ip_end - ip_start);
|
---|
| 1032 | }
|
---|
| 1033 | else
|
---|
| 1034 | #endif
|
---|
| 1035 | if(*string_ftpport == ':') {
|
---|
| 1036 | /* :port */
|
---|
| 1037 | ip_end = string_ftpport;
|
---|
| 1038 | }
|
---|
| 1039 | else if((ip_end = strchr(string_ftpport, ':')) != NULL) {
|
---|
| 1040 | /* either ipv6 or (ipv4|domain|interface):port(-range) */
|
---|
| 1041 | #ifdef ENABLE_IPV6
|
---|
| 1042 | if(Curl_inet_pton(AF_INET6, string_ftpport, sa6) == 1) {
|
---|
| 1043 | /* ipv6 */
|
---|
| 1044 | port_min = port_max = 0;
|
---|
| 1045 | strcpy(addr, string_ftpport);
|
---|
| 1046 | ip_end = NULL; /* this got no port ! */
|
---|
| 1047 | }
|
---|
| 1048 | else
|
---|
| 1049 | #endif
|
---|
| 1050 | /* (ipv4|domain|interface):port(-range) */
|
---|
| 1051 | strncpy(addr, string_ftpport, ip_end - ip_start );
|
---|
| 1052 | }
|
---|
| 1053 | else
|
---|
| 1054 | /* ipv4|interface */
|
---|
| 1055 | strcpy(addr, string_ftpport);
|
---|
| 1056 |
|
---|
| 1057 | /* parse the port */
|
---|
| 1058 | if(ip_end != NULL) {
|
---|
| 1059 | if((port_start = strchr(ip_end, ':')) != NULL) {
|
---|
| 1060 | port_min = curlx_ultous(strtoul(port_start+1, NULL, 10));
|
---|
| 1061 | if((port_sep = strchr(port_start, '-')) != NULL) {
|
---|
| 1062 | port_max = curlx_ultous(strtoul(port_sep + 1, NULL, 10));
|
---|
| 1063 | }
|
---|
| 1064 | else
|
---|
| 1065 | port_max = port_min;
|
---|
| 1066 | }
|
---|
| 1067 | }
|
---|
| 1068 |
|
---|
| 1069 | /* correct errors like:
|
---|
| 1070 | * :1234-1230
|
---|
| 1071 | * :-4711 , in this case port_min is (unsigned)-1,
|
---|
| 1072 | * therefore port_min > port_max for all cases
|
---|
| 1073 | * but port_max = (unsigned)-1
|
---|
| 1074 | */
|
---|
| 1075 | if(port_min > port_max )
|
---|
| 1076 | port_min = port_max = 0;
|
---|
| 1077 |
|
---|
| 1078 |
|
---|
| 1079 | if(*addr != '\0') {
|
---|
| 1080 | /* attempt to get the address of the given interface name */
|
---|
| 1081 | switch(Curl_if2ip(conn->ip_addr->ai_family,
|
---|
| 1082 | Curl_ipv6_scope(conn->ip_addr->ai_addr),
|
---|
| 1083 | conn->scope_id, addr, hbuf, sizeof(hbuf))) {
|
---|
| 1084 | case IF2IP_NOT_FOUND:
|
---|
| 1085 | /* not an interface, use the given string as host name instead */
|
---|
| 1086 | host = addr;
|
---|
| 1087 | break;
|
---|
| 1088 | case IF2IP_AF_NOT_SUPPORTED:
|
---|
| 1089 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1090 | case IF2IP_FOUND:
|
---|
| 1091 | host = hbuf; /* use the hbuf for host name */
|
---|
| 1092 | }
|
---|
| 1093 | }
|
---|
| 1094 | else
|
---|
| 1095 | /* there was only a port(-range) given, default the host */
|
---|
| 1096 | host = NULL;
|
---|
| 1097 | } /* data->set.ftpport */
|
---|
| 1098 |
|
---|
| 1099 | if(!host) {
|
---|
| 1100 | /* not an interface and not a host name, get default by extracting
|
---|
| 1101 | the IP from the control connection */
|
---|
| 1102 |
|
---|
| 1103 | sslen = sizeof(ss);
|
---|
| 1104 | if(getsockname(conn->sock[FIRSTSOCKET], sa, &sslen)) {
|
---|
| 1105 | failf(data, "getsockname() failed: %s",
|
---|
| 1106 | Curl_strerror(conn, SOCKERRNO) );
|
---|
| 1107 | free(addr);
|
---|
| 1108 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1109 | }
|
---|
| 1110 | switch(sa->sa_family) {
|
---|
| 1111 | #ifdef ENABLE_IPV6
|
---|
| 1112 | case AF_INET6:
|
---|
| 1113 | Curl_inet_ntop(sa->sa_family, &sa6->sin6_addr, hbuf, sizeof(hbuf));
|
---|
| 1114 | break;
|
---|
| 1115 | #endif
|
---|
| 1116 | default:
|
---|
| 1117 | Curl_inet_ntop(sa->sa_family, &sa4->sin_addr, hbuf, sizeof(hbuf));
|
---|
| 1118 | break;
|
---|
| 1119 | }
|
---|
| 1120 | host = hbuf; /* use this host name */
|
---|
| 1121 | possibly_non_local = FALSE; /* we know it is local now */
|
---|
| 1122 | }
|
---|
| 1123 |
|
---|
| 1124 | /* resolv ip/host to ip */
|
---|
| 1125 | rc = Curl_resolv(conn, host, 0, &h);
|
---|
| 1126 | if(rc == CURLRESOLV_PENDING)
|
---|
| 1127 | (void)Curl_resolver_wait_resolv(conn, &h);
|
---|
| 1128 | if(h) {
|
---|
| 1129 | res = h->addr;
|
---|
| 1130 | /* when we return from this function, we can forget about this entry
|
---|
| 1131 | to we can unlock it now already */
|
---|
| 1132 | Curl_resolv_unlock(data, h);
|
---|
| 1133 | } /* (h) */
|
---|
| 1134 | else
|
---|
| 1135 | res = NULL; /* failure! */
|
---|
| 1136 |
|
---|
| 1137 | if(res == NULL) {
|
---|
| 1138 | failf(data, "failed to resolve the address provided to PORT: %s", host);
|
---|
| 1139 | free(addr);
|
---|
| 1140 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1141 | }
|
---|
| 1142 |
|
---|
| 1143 | free(addr);
|
---|
| 1144 | host = NULL;
|
---|
| 1145 |
|
---|
| 1146 | /* step 2, create a socket for the requested address */
|
---|
| 1147 |
|
---|
| 1148 | portsock = CURL_SOCKET_BAD;
|
---|
| 1149 | error = 0;
|
---|
| 1150 | for(ai = res; ai; ai = ai->ai_next) {
|
---|
| 1151 | result = Curl_socket(conn, ai, NULL, &portsock);
|
---|
| 1152 | if(result) {
|
---|
| 1153 | error = SOCKERRNO;
|
---|
| 1154 | continue;
|
---|
| 1155 | }
|
---|
| 1156 | break;
|
---|
| 1157 | }
|
---|
| 1158 | if(!ai) {
|
---|
| 1159 | failf(data, "socket failure: %s", Curl_strerror(conn, error));
|
---|
| 1160 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1161 | }
|
---|
| 1162 |
|
---|
| 1163 | /* step 3, bind to a suitable local address */
|
---|
| 1164 |
|
---|
| 1165 | memcpy(sa, ai->ai_addr, ai->ai_addrlen);
|
---|
| 1166 | sslen = ai->ai_addrlen;
|
---|
| 1167 |
|
---|
| 1168 | for(port = port_min; port <= port_max;) {
|
---|
| 1169 | if(sa->sa_family == AF_INET)
|
---|
| 1170 | sa4->sin_port = htons(port);
|
---|
| 1171 | #ifdef ENABLE_IPV6
|
---|
| 1172 | else
|
---|
| 1173 | sa6->sin6_port = htons(port);
|
---|
| 1174 | #endif
|
---|
| 1175 | /* Try binding the given address. */
|
---|
| 1176 | if(bind(portsock, sa, sslen) ) {
|
---|
| 1177 | /* It failed. */
|
---|
| 1178 | error = SOCKERRNO;
|
---|
| 1179 | if(possibly_non_local && (error == EADDRNOTAVAIL)) {
|
---|
| 1180 | /* The requested bind address is not local. Use the address used for
|
---|
| 1181 | * the control connection instead and restart the port loop
|
---|
| 1182 | */
|
---|
| 1183 |
|
---|
| 1184 | infof(data, "bind(port=%hu) on non-local address failed: %s\n", port,
|
---|
| 1185 | Curl_strerror(conn, error) );
|
---|
| 1186 |
|
---|
| 1187 | sslen = sizeof(ss);
|
---|
| 1188 | if(getsockname(conn->sock[FIRSTSOCKET], sa, &sslen)) {
|
---|
| 1189 | failf(data, "getsockname() failed: %s",
|
---|
| 1190 | Curl_strerror(conn, SOCKERRNO) );
|
---|
| 1191 | Curl_closesocket(conn, portsock);
|
---|
| 1192 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1193 | }
|
---|
| 1194 | port = port_min;
|
---|
| 1195 | possibly_non_local = FALSE; /* don't try this again */
|
---|
| 1196 | continue;
|
---|
| 1197 | }
|
---|
| 1198 | else if(error != EADDRINUSE && error != EACCES) {
|
---|
| 1199 | failf(data, "bind(port=%hu) failed: %s", port,
|
---|
| 1200 | Curl_strerror(conn, error) );
|
---|
| 1201 | Curl_closesocket(conn, portsock);
|
---|
| 1202 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1203 | }
|
---|
| 1204 | }
|
---|
| 1205 | else
|
---|
| 1206 | break;
|
---|
| 1207 |
|
---|
| 1208 | port++;
|
---|
| 1209 | }
|
---|
| 1210 |
|
---|
| 1211 | /* maybe all ports were in use already*/
|
---|
| 1212 | if(port > port_max) {
|
---|
| 1213 | failf(data, "bind() failed, we ran out of ports!");
|
---|
| 1214 | Curl_closesocket(conn, portsock);
|
---|
| 1215 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1216 | }
|
---|
| 1217 |
|
---|
| 1218 | /* get the name again after the bind() so that we can extract the
|
---|
| 1219 | port number it uses now */
|
---|
| 1220 | sslen = sizeof(ss);
|
---|
| 1221 | if(getsockname(portsock, (struct sockaddr *)sa, &sslen)) {
|
---|
| 1222 | failf(data, "getsockname() failed: %s",
|
---|
| 1223 | Curl_strerror(conn, SOCKERRNO) );
|
---|
| 1224 | Curl_closesocket(conn, portsock);
|
---|
| 1225 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1226 | }
|
---|
| 1227 |
|
---|
| 1228 | /* step 4, listen on the socket */
|
---|
| 1229 |
|
---|
| 1230 | if(listen(portsock, 1)) {
|
---|
| 1231 | failf(data, "socket failure: %s", Curl_strerror(conn, SOCKERRNO));
|
---|
| 1232 | Curl_closesocket(conn, portsock);
|
---|
| 1233 | return CURLE_FTP_PORT_FAILED;
|
---|
| 1234 | }
|
---|
| 1235 |
|
---|
| 1236 | /* step 5, send the proper FTP command */
|
---|
| 1237 |
|
---|
| 1238 | /* get a plain printable version of the numerical address to work with
|
---|
| 1239 | below */
|
---|
| 1240 | Curl_printable_address(ai, myhost, sizeof(myhost));
|
---|
| 1241 |
|
---|
| 1242 | #ifdef ENABLE_IPV6
|
---|
| 1243 | if(!conn->bits.ftp_use_eprt && conn->bits.ipv6)
|
---|
| 1244 | /* EPRT is disabled but we are connected to a IPv6 host, so we ignore the
|
---|
| 1245 | request and enable EPRT again! */
|
---|
| 1246 | conn->bits.ftp_use_eprt = TRUE;
|
---|
| 1247 | #endif
|
---|
| 1248 |
|
---|
| 1249 | for(; fcmd != DONE; fcmd++) {
|
---|
| 1250 |
|
---|
| 1251 | if(!conn->bits.ftp_use_eprt && (EPRT == fcmd))
|
---|
| 1252 | /* if disabled, goto next */
|
---|
| 1253 | continue;
|
---|
| 1254 |
|
---|
| 1255 | if((PORT == fcmd) && sa->sa_family != AF_INET)
|
---|
| 1256 | /* PORT is IPv4 only */
|
---|
| 1257 | continue;
|
---|
| 1258 |
|
---|
| 1259 | switch(sa->sa_family) {
|
---|
| 1260 | case AF_INET:
|
---|
| 1261 | port = ntohs(sa4->sin_port);
|
---|
| 1262 | break;
|
---|
| 1263 | #ifdef ENABLE_IPV6
|
---|
| 1264 | case AF_INET6:
|
---|
| 1265 | port = ntohs(sa6->sin6_port);
|
---|
| 1266 | break;
|
---|
| 1267 | #endif
|
---|
| 1268 | default:
|
---|
| 1269 | continue; /* might as well skip this */
|
---|
| 1270 | }
|
---|
| 1271 |
|
---|
| 1272 | if(EPRT == fcmd) {
|
---|
| 1273 | /*
|
---|
| 1274 | * Two fine examples from RFC2428;
|
---|
| 1275 | *
|
---|
| 1276 | * EPRT |1|132.235.1.2|6275|
|
---|
| 1277 | *
|
---|
| 1278 | * EPRT |2|1080::8:800:200C:417A|5282|
|
---|
| 1279 | */
|
---|
| 1280 |
|
---|
| 1281 | result = Curl_pp_sendf(&ftpc->pp, "%s |%d|%s|%hu|", mode[fcmd],
|
---|
| 1282 | sa->sa_family == AF_INET?1:2,
|
---|
| 1283 | myhost, port);
|
---|
| 1284 | if(result) {
|
---|
| 1285 | failf(data, "Failure sending EPRT command: %s",
|
---|
| 1286 | curl_easy_strerror(result));
|
---|
| 1287 | Curl_closesocket(conn, portsock);
|
---|
| 1288 | /* don't retry using PORT */
|
---|
| 1289 | ftpc->count1 = PORT;
|
---|
| 1290 | /* bail out */
|
---|
| 1291 | state(conn, FTP_STOP);
|
---|
| 1292 | return result;
|
---|
| 1293 | }
|
---|
| 1294 | break;
|
---|
| 1295 | }
|
---|
| 1296 | else if(PORT == fcmd) {
|
---|
| 1297 | char *source = myhost;
|
---|
| 1298 | char *dest = tmp;
|
---|
| 1299 |
|
---|
| 1300 | /* translate x.x.x.x to x,x,x,x */
|
---|
| 1301 | while(source && *source) {
|
---|
| 1302 | if(*source == '.')
|
---|
| 1303 | *dest=',';
|
---|
| 1304 | else
|
---|
| 1305 | *dest = *source;
|
---|
| 1306 | dest++;
|
---|
| 1307 | source++;
|
---|
| 1308 | }
|
---|
| 1309 | *dest = 0;
|
---|
| 1310 | snprintf(dest, 20, ",%d,%d", (int)(port>>8), (int)(port&0xff));
|
---|
| 1311 |
|
---|
| 1312 | result = Curl_pp_sendf(&ftpc->pp, "%s %s", mode[fcmd], tmp);
|
---|
| 1313 | if(result) {
|
---|
| 1314 | failf(data, "Failure sending PORT command: %s",
|
---|
| 1315 | curl_easy_strerror(result));
|
---|
| 1316 | Curl_closesocket(conn, portsock);
|
---|
| 1317 | /* bail out */
|
---|
| 1318 | state(conn, FTP_STOP);
|
---|
| 1319 | return result;
|
---|
| 1320 | }
|
---|
| 1321 | break;
|
---|
| 1322 | }
|
---|
| 1323 | }
|
---|
| 1324 |
|
---|
| 1325 | /* store which command was sent */
|
---|
| 1326 | ftpc->count1 = fcmd;
|
---|
| 1327 |
|
---|
| 1328 | /* we set the secondary socket variable to this for now, it is only so that
|
---|
| 1329 | the cleanup function will close it in case we fail before the true
|
---|
| 1330 | secondary stuff is made */
|
---|
| 1331 | if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET])
|
---|
| 1332 | Curl_closesocket(conn, conn->sock[SECONDARYSOCKET]);
|
---|
| 1333 | conn->sock[SECONDARYSOCKET] = portsock;
|
---|
| 1334 |
|
---|
| 1335 | /* this tcpconnect assignment below is a hackish work-around to make the
|
---|
| 1336 | multi interface with active FTP work - as it will not wait for a
|
---|
| 1337 | (passive) connect in Curl_is_connected().
|
---|
| 1338 |
|
---|
| 1339 | The *proper* fix is to make sure that the active connection from the
|
---|
| 1340 | server is done in a non-blocking way. Currently, it is still BLOCKING.
|
---|
| 1341 | */
|
---|
| 1342 | conn->bits.tcpconnect[SECONDARYSOCKET] = TRUE;
|
---|
| 1343 |
|
---|
| 1344 | state(conn, FTP_PORT);
|
---|
| 1345 | return result;
|
---|
| 1346 | }
|
---|
| 1347 |
|
---|
| 1348 | static CURLcode ftp_state_use_pasv(struct connectdata *conn)
|
---|
| 1349 | {
|
---|
| 1350 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1351 | CURLcode result = CURLE_OK;
|
---|
| 1352 | /*
|
---|
| 1353 | Here's the excecutive summary on what to do:
|
---|
| 1354 |
|
---|
| 1355 | PASV is RFC959, expect:
|
---|
| 1356 | 227 Entering Passive Mode (a1,a2,a3,a4,p1,p2)
|
---|
| 1357 |
|
---|
| 1358 | LPSV is RFC1639, expect:
|
---|
| 1359 | 228 Entering Long Passive Mode (4,4,a1,a2,a3,a4,2,p1,p2)
|
---|
| 1360 |
|
---|
| 1361 | EPSV is RFC2428, expect:
|
---|
| 1362 | 229 Entering Extended Passive Mode (|||port|)
|
---|
| 1363 |
|
---|
| 1364 | */
|
---|
| 1365 |
|
---|
| 1366 | static const char mode[][5] = { "EPSV", "PASV" };
|
---|
| 1367 | int modeoff;
|
---|
| 1368 |
|
---|
| 1369 | #ifdef PF_INET6
|
---|
| 1370 | if(!conn->bits.ftp_use_epsv && conn->bits.ipv6)
|
---|
| 1371 | /* EPSV is disabled but we are connected to a IPv6 host, so we ignore the
|
---|
| 1372 | request and enable EPSV again! */
|
---|
| 1373 | conn->bits.ftp_use_epsv = TRUE;
|
---|
| 1374 | #endif
|
---|
| 1375 |
|
---|
| 1376 | modeoff = conn->bits.ftp_use_epsv?0:1;
|
---|
| 1377 |
|
---|
| 1378 | PPSENDF(&ftpc->pp, "%s", mode[modeoff]);
|
---|
| 1379 |
|
---|
| 1380 | ftpc->count1 = modeoff;
|
---|
| 1381 | state(conn, FTP_PASV);
|
---|
| 1382 | infof(conn->data, "Connect data stream passively\n");
|
---|
| 1383 |
|
---|
| 1384 | return result;
|
---|
| 1385 | }
|
---|
| 1386 |
|
---|
| 1387 | /*
|
---|
| 1388 | * ftp_state_prepare_transfer() starts PORT, PASV or PRET etc.
|
---|
| 1389 | *
|
---|
| 1390 | * REST is the last command in the chain of commands when a "head"-like
|
---|
| 1391 | * request is made. Thus, if an actual transfer is to be made this is where we
|
---|
| 1392 | * take off for real.
|
---|
| 1393 | */
|
---|
| 1394 | static CURLcode ftp_state_prepare_transfer(struct connectdata *conn)
|
---|
| 1395 | {
|
---|
| 1396 | CURLcode result = CURLE_OK;
|
---|
| 1397 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 1398 | struct SessionHandle *data = conn->data;
|
---|
| 1399 |
|
---|
| 1400 | if(ftp->transfer != FTPTRANSFER_BODY) {
|
---|
| 1401 | /* doesn't transfer any data */
|
---|
| 1402 |
|
---|
| 1403 | /* still possibly do PRE QUOTE jobs */
|
---|
| 1404 | state(conn, FTP_RETR_PREQUOTE);
|
---|
| 1405 | result = ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
|
---|
| 1406 | }
|
---|
| 1407 | else if(data->set.ftp_use_port) {
|
---|
| 1408 | /* We have chosen to use the PORT (or similar) command */
|
---|
| 1409 | result = ftp_state_use_port(conn, EPRT);
|
---|
| 1410 | }
|
---|
| 1411 | else {
|
---|
| 1412 | /* We have chosen (this is default) to use the PASV (or similar) command */
|
---|
| 1413 | if(data->set.ftp_use_pret) {
|
---|
| 1414 | /* The user has requested that we send a PRET command
|
---|
| 1415 | to prepare the server for the upcoming PASV */
|
---|
| 1416 | if(!conn->proto.ftpc.file) {
|
---|
| 1417 | PPSENDF(&conn->proto.ftpc.pp, "PRET %s",
|
---|
| 1418 | data->set.str[STRING_CUSTOMREQUEST]?
|
---|
| 1419 | data->set.str[STRING_CUSTOMREQUEST]:
|
---|
| 1420 | (data->set.ftp_list_only?"NLST":"LIST"));
|
---|
| 1421 | }
|
---|
| 1422 | else if(data->set.upload) {
|
---|
| 1423 | PPSENDF(&conn->proto.ftpc.pp, "PRET STOR %s", conn->proto.ftpc.file);
|
---|
| 1424 | }
|
---|
| 1425 | else {
|
---|
| 1426 | PPSENDF(&conn->proto.ftpc.pp, "PRET RETR %s", conn->proto.ftpc.file);
|
---|
| 1427 | }
|
---|
| 1428 | state(conn, FTP_PRET);
|
---|
| 1429 | }
|
---|
| 1430 | else {
|
---|
| 1431 | result = ftp_state_use_pasv(conn);
|
---|
| 1432 | }
|
---|
| 1433 | }
|
---|
| 1434 | return result;
|
---|
| 1435 | }
|
---|
| 1436 |
|
---|
| 1437 | static CURLcode ftp_state_rest(struct connectdata *conn)
|
---|
| 1438 | {
|
---|
| 1439 | CURLcode result = CURLE_OK;
|
---|
| 1440 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 1441 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1442 |
|
---|
| 1443 | if((ftp->transfer != FTPTRANSFER_BODY) && ftpc->file) {
|
---|
| 1444 | /* if a "head"-like request is being made (on a file) */
|
---|
| 1445 |
|
---|
| 1446 | /* Determine if server can respond to REST command and therefore
|
---|
| 1447 | whether it supports range */
|
---|
| 1448 | PPSENDF(&conn->proto.ftpc.pp, "REST %d", 0);
|
---|
| 1449 |
|
---|
| 1450 | state(conn, FTP_REST);
|
---|
| 1451 | }
|
---|
| 1452 | else
|
---|
| 1453 | result = ftp_state_prepare_transfer(conn);
|
---|
| 1454 |
|
---|
| 1455 | return result;
|
---|
| 1456 | }
|
---|
| 1457 |
|
---|
| 1458 | static CURLcode ftp_state_size(struct connectdata *conn)
|
---|
| 1459 | {
|
---|
| 1460 | CURLcode result = CURLE_OK;
|
---|
| 1461 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 1462 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1463 |
|
---|
| 1464 | if((ftp->transfer == FTPTRANSFER_INFO) && ftpc->file) {
|
---|
| 1465 | /* if a "head"-like request is being made (on a file) */
|
---|
| 1466 |
|
---|
| 1467 | /* we know ftpc->file is a valid pointer to a file name */
|
---|
| 1468 | PPSENDF(&ftpc->pp, "SIZE %s", ftpc->file);
|
---|
| 1469 |
|
---|
| 1470 | state(conn, FTP_SIZE);
|
---|
| 1471 | }
|
---|
| 1472 | else
|
---|
| 1473 | result = ftp_state_rest(conn);
|
---|
| 1474 |
|
---|
| 1475 | return result;
|
---|
| 1476 | }
|
---|
| 1477 |
|
---|
| 1478 | static CURLcode ftp_state_list(struct connectdata *conn)
|
---|
| 1479 | {
|
---|
| 1480 | CURLcode result = CURLE_OK;
|
---|
| 1481 | struct SessionHandle *data = conn->data;
|
---|
| 1482 |
|
---|
| 1483 | /* If this output is to be machine-parsed, the NLST command might be better
|
---|
| 1484 | to use, since the LIST command output is not specified or standard in any
|
---|
| 1485 | way. It has turned out that the NLST list output is not the same on all
|
---|
| 1486 | servers either... */
|
---|
| 1487 |
|
---|
| 1488 | /*
|
---|
| 1489 | if FTPFILE_NOCWD was specified, we are currently in
|
---|
| 1490 | the user's home directory, so we should add the path
|
---|
| 1491 | as argument for the LIST / NLST / or custom command.
|
---|
| 1492 | Whether the server will support this, is uncertain.
|
---|
| 1493 |
|
---|
| 1494 | The other ftp_filemethods will CWD into dir/dir/ first and
|
---|
| 1495 | then just do LIST (in that case: nothing to do here)
|
---|
| 1496 | */
|
---|
| 1497 | char *cmd, *lstArg, *slashPos;
|
---|
| 1498 |
|
---|
| 1499 | lstArg = NULL;
|
---|
| 1500 | if((data->set.ftp_filemethod == FTPFILE_NOCWD) &&
|
---|
| 1501 | data->state.path &&
|
---|
| 1502 | data->state.path[0] &&
|
---|
| 1503 | strchr(data->state.path, '/')) {
|
---|
| 1504 |
|
---|
| 1505 | lstArg = strdup(data->state.path);
|
---|
| 1506 | if(!lstArg)
|
---|
| 1507 | return CURLE_OUT_OF_MEMORY;
|
---|
| 1508 |
|
---|
| 1509 | /* Check if path does not end with /, as then we cut off the file part */
|
---|
| 1510 | if(lstArg[strlen(lstArg) - 1] != '/') {
|
---|
| 1511 |
|
---|
| 1512 | /* chop off the file part if format is dir/dir/file */
|
---|
| 1513 | slashPos = strrchr(lstArg, '/');
|
---|
| 1514 | if(slashPos)
|
---|
| 1515 | *(slashPos+1) = '\0';
|
---|
| 1516 | }
|
---|
| 1517 | }
|
---|
| 1518 |
|
---|
| 1519 | cmd = aprintf( "%s%s%s",
|
---|
| 1520 | data->set.str[STRING_CUSTOMREQUEST]?
|
---|
| 1521 | data->set.str[STRING_CUSTOMREQUEST]:
|
---|
| 1522 | (data->set.ftp_list_only?"NLST":"LIST"),
|
---|
| 1523 | lstArg? " ": "",
|
---|
| 1524 | lstArg? lstArg: "" );
|
---|
| 1525 |
|
---|
| 1526 | if(!cmd) {
|
---|
| 1527 | free(lstArg);
|
---|
| 1528 | return CURLE_OUT_OF_MEMORY;
|
---|
| 1529 | }
|
---|
| 1530 |
|
---|
| 1531 | result = Curl_pp_sendf(&conn->proto.ftpc.pp, "%s", cmd);
|
---|
| 1532 |
|
---|
| 1533 | free(lstArg);
|
---|
| 1534 | free(cmd);
|
---|
| 1535 |
|
---|
| 1536 | if(result)
|
---|
| 1537 | return result;
|
---|
| 1538 |
|
---|
| 1539 | state(conn, FTP_LIST);
|
---|
| 1540 |
|
---|
| 1541 | return result;
|
---|
| 1542 | }
|
---|
| 1543 |
|
---|
| 1544 | static CURLcode ftp_state_retr_prequote(struct connectdata *conn)
|
---|
| 1545 | {
|
---|
| 1546 | CURLcode result = CURLE_OK;
|
---|
| 1547 |
|
---|
| 1548 | /* We've sent the TYPE, now we must send the list of prequote strings */
|
---|
| 1549 |
|
---|
| 1550 | result = ftp_state_quote(conn, TRUE, FTP_RETR_PREQUOTE);
|
---|
| 1551 |
|
---|
| 1552 | return result;
|
---|
| 1553 | }
|
---|
| 1554 |
|
---|
| 1555 | static CURLcode ftp_state_stor_prequote(struct connectdata *conn)
|
---|
| 1556 | {
|
---|
| 1557 | CURLcode result = CURLE_OK;
|
---|
| 1558 |
|
---|
| 1559 | /* We've sent the TYPE, now we must send the list of prequote strings */
|
---|
| 1560 |
|
---|
| 1561 | result = ftp_state_quote(conn, TRUE, FTP_STOR_PREQUOTE);
|
---|
| 1562 |
|
---|
| 1563 | return result;
|
---|
| 1564 | }
|
---|
| 1565 |
|
---|
| 1566 | static CURLcode ftp_state_type(struct connectdata *conn)
|
---|
| 1567 | {
|
---|
| 1568 | CURLcode result = CURLE_OK;
|
---|
| 1569 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 1570 | struct SessionHandle *data = conn->data;
|
---|
| 1571 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1572 |
|
---|
| 1573 | /* If we have selected NOBODY and HEADER, it means that we only want file
|
---|
| 1574 | information. Which in FTP can't be much more than the file size and
|
---|
| 1575 | date. */
|
---|
| 1576 | if(data->set.opt_no_body && ftpc->file &&
|
---|
| 1577 | ftp_need_type(conn, data->set.prefer_ascii)) {
|
---|
| 1578 | /* The SIZE command is _not_ RFC 959 specified, and therefor many servers
|
---|
| 1579 | may not support it! It is however the only way we have to get a file's
|
---|
| 1580 | size! */
|
---|
| 1581 |
|
---|
| 1582 | ftp->transfer = FTPTRANSFER_INFO;
|
---|
| 1583 | /* this means no actual transfer will be made */
|
---|
| 1584 |
|
---|
| 1585 | /* Some servers return different sizes for different modes, and thus we
|
---|
| 1586 | must set the proper type before we check the size */
|
---|
| 1587 | result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_TYPE);
|
---|
| 1588 | if(result)
|
---|
| 1589 | return result;
|
---|
| 1590 | }
|
---|
| 1591 | else
|
---|
| 1592 | result = ftp_state_size(conn);
|
---|
| 1593 |
|
---|
| 1594 | return result;
|
---|
| 1595 | }
|
---|
| 1596 |
|
---|
| 1597 | /* This is called after the CWD commands have been done in the beginning of
|
---|
| 1598 | the DO phase */
|
---|
| 1599 | static CURLcode ftp_state_mdtm(struct connectdata *conn)
|
---|
| 1600 | {
|
---|
| 1601 | CURLcode result = CURLE_OK;
|
---|
| 1602 | struct SessionHandle *data = conn->data;
|
---|
| 1603 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1604 |
|
---|
| 1605 | /* Requested time of file or time-depended transfer? */
|
---|
| 1606 | if((data->set.get_filetime || data->set.timecondition) && ftpc->file) {
|
---|
| 1607 |
|
---|
| 1608 | /* we have requested to get the modified-time of the file, this is a white
|
---|
| 1609 | spot as the MDTM is not mentioned in RFC959 */
|
---|
| 1610 | PPSENDF(&ftpc->pp, "MDTM %s", ftpc->file);
|
---|
| 1611 |
|
---|
| 1612 | state(conn, FTP_MDTM);
|
---|
| 1613 | }
|
---|
| 1614 | else
|
---|
| 1615 | result = ftp_state_type(conn);
|
---|
| 1616 |
|
---|
| 1617 | return result;
|
---|
| 1618 | }
|
---|
| 1619 |
|
---|
| 1620 |
|
---|
| 1621 | /* This is called after the TYPE and possible quote commands have been sent */
|
---|
| 1622 | static CURLcode ftp_state_ul_setup(struct connectdata *conn,
|
---|
| 1623 | bool sizechecked)
|
---|
| 1624 | {
|
---|
| 1625 | CURLcode result = CURLE_OK;
|
---|
| 1626 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 1627 | struct SessionHandle *data = conn->data;
|
---|
| 1628 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1629 | int seekerr = CURL_SEEKFUNC_OK;
|
---|
| 1630 |
|
---|
| 1631 | if((data->state.resume_from && !sizechecked) ||
|
---|
| 1632 | ((data->state.resume_from > 0) && sizechecked)) {
|
---|
| 1633 | /* we're about to continue the uploading of a file */
|
---|
| 1634 | /* 1. get already existing file's size. We use the SIZE command for this
|
---|
| 1635 | which may not exist in the server! The SIZE command is not in
|
---|
| 1636 | RFC959. */
|
---|
| 1637 |
|
---|
| 1638 | /* 2. This used to set REST. But since we can do append, we
|
---|
| 1639 | don't another ftp command. We just skip the source file
|
---|
| 1640 | offset and then we APPEND the rest on the file instead */
|
---|
| 1641 |
|
---|
| 1642 | /* 3. pass file-size number of bytes in the source file */
|
---|
| 1643 | /* 4. lower the infilesize counter */
|
---|
| 1644 | /* => transfer as usual */
|
---|
| 1645 |
|
---|
| 1646 | if(data->state.resume_from < 0 ) {
|
---|
| 1647 | /* Got no given size to start from, figure it out */
|
---|
| 1648 | PPSENDF(&ftpc->pp, "SIZE %s", ftpc->file);
|
---|
| 1649 | state(conn, FTP_STOR_SIZE);
|
---|
| 1650 | return result;
|
---|
| 1651 | }
|
---|
| 1652 |
|
---|
| 1653 | /* enable append */
|
---|
| 1654 | data->set.ftp_append = TRUE;
|
---|
| 1655 |
|
---|
| 1656 | /* Let's read off the proper amount of bytes from the input. */
|
---|
| 1657 | if(conn->seek_func) {
|
---|
| 1658 | seekerr = conn->seek_func(conn->seek_client, data->state.resume_from,
|
---|
| 1659 | SEEK_SET);
|
---|
| 1660 | }
|
---|
| 1661 |
|
---|
| 1662 | if(seekerr != CURL_SEEKFUNC_OK) {
|
---|
| 1663 | if(seekerr != CURL_SEEKFUNC_CANTSEEK) {
|
---|
| 1664 | failf(data, "Could not seek stream");
|
---|
| 1665 | return CURLE_FTP_COULDNT_USE_REST;
|
---|
| 1666 | }
|
---|
| 1667 | /* seekerr == CURL_SEEKFUNC_CANTSEEK (can't seek to offset) */
|
---|
| 1668 | else {
|
---|
| 1669 | curl_off_t passed=0;
|
---|
| 1670 | do {
|
---|
| 1671 | size_t readthisamountnow =
|
---|
| 1672 | (data->state.resume_from - passed > CURL_OFF_T_C(BUFSIZE)) ?
|
---|
| 1673 | BUFSIZE : curlx_sotouz(data->state.resume_from - passed);
|
---|
| 1674 |
|
---|
| 1675 | size_t actuallyread =
|
---|
| 1676 | data->state.fread_func(data->state.buffer, 1, readthisamountnow,
|
---|
| 1677 | data->state.in);
|
---|
| 1678 |
|
---|
| 1679 | passed += actuallyread;
|
---|
| 1680 | if((actuallyread == 0) || (actuallyread > readthisamountnow)) {
|
---|
| 1681 | /* this checks for greater-than only to make sure that the
|
---|
| 1682 | CURL_READFUNC_ABORT return code still aborts */
|
---|
| 1683 | failf(data, "Failed to read data");
|
---|
| 1684 | return CURLE_FTP_COULDNT_USE_REST;
|
---|
| 1685 | }
|
---|
| 1686 | } while(passed < data->state.resume_from);
|
---|
| 1687 | }
|
---|
| 1688 | }
|
---|
| 1689 | /* now, decrease the size of the read */
|
---|
| 1690 | if(data->state.infilesize>0) {
|
---|
| 1691 | data->state.infilesize -= data->state.resume_from;
|
---|
| 1692 |
|
---|
| 1693 | if(data->state.infilesize <= 0) {
|
---|
| 1694 | infof(data, "File already completely uploaded\n");
|
---|
| 1695 |
|
---|
| 1696 | /* no data to transfer */
|
---|
| 1697 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
| 1698 |
|
---|
| 1699 | /* Set ->transfer so that we won't get any error in
|
---|
| 1700 | * ftp_done() because we didn't transfer anything! */
|
---|
| 1701 | ftp->transfer = FTPTRANSFER_NONE;
|
---|
| 1702 |
|
---|
| 1703 | state(conn, FTP_STOP);
|
---|
| 1704 | return CURLE_OK;
|
---|
| 1705 | }
|
---|
| 1706 | }
|
---|
| 1707 | /* we've passed, proceed as normal */
|
---|
| 1708 | } /* resume_from */
|
---|
| 1709 |
|
---|
| 1710 | PPSENDF(&ftpc->pp, data->set.ftp_append?"APPE %s":"STOR %s",
|
---|
| 1711 | ftpc->file);
|
---|
| 1712 |
|
---|
| 1713 | state(conn, FTP_STOR);
|
---|
| 1714 |
|
---|
| 1715 | return result;
|
---|
| 1716 | }
|
---|
| 1717 |
|
---|
| 1718 | static CURLcode ftp_state_quote(struct connectdata *conn,
|
---|
| 1719 | bool init,
|
---|
| 1720 | ftpstate instate)
|
---|
| 1721 | {
|
---|
| 1722 | CURLcode result = CURLE_OK;
|
---|
| 1723 | struct SessionHandle *data = conn->data;
|
---|
| 1724 | struct FTP *ftp = data->req.protop;
|
---|
| 1725 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1726 | bool quote=FALSE;
|
---|
| 1727 | struct curl_slist *item;
|
---|
| 1728 |
|
---|
| 1729 | switch(instate) {
|
---|
| 1730 | case FTP_QUOTE:
|
---|
| 1731 | default:
|
---|
| 1732 | item = data->set.quote;
|
---|
| 1733 | break;
|
---|
| 1734 | case FTP_RETR_PREQUOTE:
|
---|
| 1735 | case FTP_STOR_PREQUOTE:
|
---|
| 1736 | item = data->set.prequote;
|
---|
| 1737 | break;
|
---|
| 1738 | case FTP_POSTQUOTE:
|
---|
| 1739 | item = data->set.postquote;
|
---|
| 1740 | break;
|
---|
| 1741 | }
|
---|
| 1742 |
|
---|
| 1743 | /*
|
---|
| 1744 | * This state uses:
|
---|
| 1745 | * 'count1' to iterate over the commands to send
|
---|
| 1746 | * 'count2' to store wether to allow commands to fail
|
---|
| 1747 | */
|
---|
| 1748 |
|
---|
| 1749 | if(init)
|
---|
| 1750 | ftpc->count1 = 0;
|
---|
| 1751 | else
|
---|
| 1752 | ftpc->count1++;
|
---|
| 1753 |
|
---|
| 1754 | if(item) {
|
---|
| 1755 | int i = 0;
|
---|
| 1756 |
|
---|
| 1757 | /* Skip count1 items in the linked list */
|
---|
| 1758 | while((i< ftpc->count1) && item) {
|
---|
| 1759 | item = item->next;
|
---|
| 1760 | i++;
|
---|
| 1761 | }
|
---|
| 1762 | if(item) {
|
---|
| 1763 | char *cmd = item->data;
|
---|
| 1764 | if(cmd[0] == '*') {
|
---|
| 1765 | cmd++;
|
---|
| 1766 | ftpc->count2 = 1; /* the sent command is allowed to fail */
|
---|
| 1767 | }
|
---|
| 1768 | else
|
---|
| 1769 | ftpc->count2 = 0; /* failure means cancel operation */
|
---|
| 1770 |
|
---|
| 1771 | PPSENDF(&ftpc->pp, "%s", cmd);
|
---|
| 1772 | state(conn, instate);
|
---|
| 1773 | quote = TRUE;
|
---|
| 1774 | }
|
---|
| 1775 | }
|
---|
| 1776 |
|
---|
| 1777 | if(!quote) {
|
---|
| 1778 | /* No more quote to send, continue to ... */
|
---|
| 1779 | switch(instate) {
|
---|
| 1780 | case FTP_QUOTE:
|
---|
| 1781 | default:
|
---|
| 1782 | result = ftp_state_cwd(conn);
|
---|
| 1783 | break;
|
---|
| 1784 | case FTP_RETR_PREQUOTE:
|
---|
| 1785 | if(ftp->transfer != FTPTRANSFER_BODY)
|
---|
| 1786 | state(conn, FTP_STOP);
|
---|
| 1787 | else {
|
---|
| 1788 | if(ftpc->known_filesize != -1) {
|
---|
| 1789 | Curl_pgrsSetDownloadSize(data, ftpc->known_filesize);
|
---|
| 1790 | result = ftp_state_retr(conn, ftpc->known_filesize);
|
---|
| 1791 | }
|
---|
| 1792 | else {
|
---|
| 1793 | if(data->set.ignorecl) {
|
---|
| 1794 | /* This code is to support download of growing files. It prevents
|
---|
| 1795 | the state machine from requesting the file size from the
|
---|
| 1796 | server. With an unknown file size the download continues until
|
---|
| 1797 | the server terminates it, otherwise the client stops if the
|
---|
| 1798 | received byte count exceeds the reported file size. Set option
|
---|
| 1799 | CURLOPT_IGNORE_CONTENT_LENGTH to 1 to enable this behavior.*/
|
---|
| 1800 | PPSENDF(&ftpc->pp, "RETR %s", ftpc->file);
|
---|
| 1801 | state(conn, FTP_RETR);
|
---|
| 1802 | }
|
---|
| 1803 | else {
|
---|
| 1804 | PPSENDF(&ftpc->pp, "SIZE %s", ftpc->file);
|
---|
| 1805 | state(conn, FTP_RETR_SIZE);
|
---|
| 1806 | }
|
---|
| 1807 | }
|
---|
| 1808 | }
|
---|
| 1809 | break;
|
---|
| 1810 | case FTP_STOR_PREQUOTE:
|
---|
| 1811 | result = ftp_state_ul_setup(conn, FALSE);
|
---|
| 1812 | break;
|
---|
| 1813 | case FTP_POSTQUOTE:
|
---|
| 1814 | break;
|
---|
| 1815 | }
|
---|
| 1816 | }
|
---|
| 1817 |
|
---|
| 1818 | return result;
|
---|
| 1819 | }
|
---|
| 1820 |
|
---|
| 1821 | /* called from ftp_state_pasv_resp to switch to PASV in case of EPSV
|
---|
| 1822 | problems */
|
---|
| 1823 | static CURLcode ftp_epsv_disable(struct connectdata *conn)
|
---|
| 1824 | {
|
---|
| 1825 | CURLcode result = CURLE_OK;
|
---|
| 1826 |
|
---|
| 1827 | if(conn->bits.ipv6) {
|
---|
| 1828 | /* We can't disable EPSV when doing IPv6, so this is instead a fail */
|
---|
| 1829 | failf(conn->data, "Failed EPSV attempt, exiting\n");
|
---|
| 1830 | return CURLE_FTP_WEIRD_SERVER_REPLY;
|
---|
| 1831 | }
|
---|
| 1832 |
|
---|
| 1833 | infof(conn->data, "Failed EPSV attempt. Disabling EPSV\n");
|
---|
| 1834 | /* disable it for next transfer */
|
---|
| 1835 | conn->bits.ftp_use_epsv = FALSE;
|
---|
| 1836 | conn->data->state.errorbuf = FALSE; /* allow error message to get
|
---|
| 1837 | rewritten */
|
---|
| 1838 | PPSENDF(&conn->proto.ftpc.pp, "%s", "PASV");
|
---|
| 1839 | conn->proto.ftpc.count1++;
|
---|
| 1840 | /* remain in/go to the FTP_PASV state */
|
---|
| 1841 | state(conn, FTP_PASV);
|
---|
| 1842 | return result;
|
---|
| 1843 | }
|
---|
| 1844 |
|
---|
| 1845 | /*
|
---|
| 1846 | * Perform the necessary magic that needs to be done once the TCP connection
|
---|
| 1847 | * to the proxy has completed.
|
---|
| 1848 | */
|
---|
| 1849 | static CURLcode proxy_magic(struct connectdata *conn,
|
---|
| 1850 | char *newhost, unsigned short newport,
|
---|
| 1851 | bool *magicdone)
|
---|
| 1852 | {
|
---|
| 1853 | CURLcode result = CURLE_OK;
|
---|
| 1854 | struct SessionHandle *data = conn->data;
|
---|
| 1855 |
|
---|
| 1856 | #if defined(CURL_DISABLE_PROXY)
|
---|
| 1857 | (void) newhost;
|
---|
| 1858 | (void) newport;
|
---|
| 1859 | #endif
|
---|
| 1860 |
|
---|
| 1861 | *magicdone = FALSE;
|
---|
| 1862 |
|
---|
| 1863 | switch(conn->proxytype) {
|
---|
| 1864 | case CURLPROXY_SOCKS5:
|
---|
| 1865 | case CURLPROXY_SOCKS5_HOSTNAME:
|
---|
| 1866 | result = Curl_SOCKS5(conn->proxyuser, conn->proxypasswd, newhost,
|
---|
| 1867 | newport, SECONDARYSOCKET, conn);
|
---|
| 1868 | *magicdone = TRUE;
|
---|
| 1869 | break;
|
---|
| 1870 | case CURLPROXY_SOCKS4:
|
---|
| 1871 | result = Curl_SOCKS4(conn->proxyuser, newhost, newport,
|
---|
| 1872 | SECONDARYSOCKET, conn, FALSE);
|
---|
| 1873 | *magicdone = TRUE;
|
---|
| 1874 | break;
|
---|
| 1875 | case CURLPROXY_SOCKS4A:
|
---|
| 1876 | result = Curl_SOCKS4(conn->proxyuser, newhost, newport,
|
---|
| 1877 | SECONDARYSOCKET, conn, TRUE);
|
---|
| 1878 | *magicdone = TRUE;
|
---|
| 1879 | break;
|
---|
| 1880 | case CURLPROXY_HTTP:
|
---|
| 1881 | case CURLPROXY_HTTP_1_0:
|
---|
| 1882 | /* do nothing here. handled later. */
|
---|
| 1883 | break;
|
---|
| 1884 | default:
|
---|
| 1885 | failf(data, "unknown proxytype option given");
|
---|
| 1886 | result = CURLE_COULDNT_CONNECT;
|
---|
| 1887 | break;
|
---|
| 1888 | }
|
---|
| 1889 |
|
---|
| 1890 | if(conn->bits.tunnel_proxy && conn->bits.httpproxy) {
|
---|
| 1891 | /* BLOCKING */
|
---|
| 1892 | /* We want "seamless" FTP operations through HTTP proxy tunnel */
|
---|
| 1893 |
|
---|
| 1894 | /* Curl_proxyCONNECT is based on a pointer to a struct HTTP at the
|
---|
| 1895 | * member conn->proto.http; we want FTP through HTTP and we have to
|
---|
| 1896 | * change the member temporarily for connecting to the HTTP proxy. After
|
---|
| 1897 | * Curl_proxyCONNECT we have to set back the member to the original
|
---|
| 1898 | * struct FTP pointer
|
---|
| 1899 | */
|
---|
| 1900 | struct HTTP http_proxy;
|
---|
| 1901 | struct FTP *ftp_save = data->req.protop;
|
---|
| 1902 | memset(&http_proxy, 0, sizeof(http_proxy));
|
---|
| 1903 | data->req.protop = &http_proxy;
|
---|
| 1904 |
|
---|
| 1905 | result = Curl_proxyCONNECT(conn, SECONDARYSOCKET, newhost, newport, TRUE);
|
---|
| 1906 |
|
---|
| 1907 | data->req.protop = ftp_save;
|
---|
| 1908 |
|
---|
| 1909 | if(result)
|
---|
| 1910 | return result;
|
---|
| 1911 |
|
---|
| 1912 | if(conn->tunnel_state[SECONDARYSOCKET] != TUNNEL_COMPLETE) {
|
---|
| 1913 | /* the CONNECT procedure is not complete, the tunnel is not yet up */
|
---|
| 1914 | state(conn, FTP_STOP); /* this phase is completed */
|
---|
| 1915 | return result;
|
---|
| 1916 | }
|
---|
| 1917 | else
|
---|
| 1918 | *magicdone = TRUE;
|
---|
| 1919 | }
|
---|
| 1920 |
|
---|
| 1921 | return result;
|
---|
| 1922 | }
|
---|
| 1923 |
|
---|
| 1924 | static char *control_address(struct connectdata *conn)
|
---|
| 1925 | {
|
---|
| 1926 | /* Returns the control connection IP address.
|
---|
| 1927 | If a proxy tunnel is used, returns the original host name instead, because
|
---|
| 1928 | the effective control connection address is the proxy address,
|
---|
| 1929 | not the ftp host. */
|
---|
| 1930 | if(conn->bits.tunnel_proxy ||
|
---|
| 1931 | conn->proxytype == CURLPROXY_SOCKS5 ||
|
---|
| 1932 | conn->proxytype == CURLPROXY_SOCKS5_HOSTNAME ||
|
---|
| 1933 | conn->proxytype == CURLPROXY_SOCKS4 ||
|
---|
| 1934 | conn->proxytype == CURLPROXY_SOCKS4A)
|
---|
| 1935 | return conn->host.name;
|
---|
| 1936 |
|
---|
| 1937 | return conn->ip_addr_str;
|
---|
| 1938 | }
|
---|
| 1939 |
|
---|
| 1940 | static CURLcode ftp_state_pasv_resp(struct connectdata *conn,
|
---|
| 1941 | int ftpcode)
|
---|
| 1942 | {
|
---|
| 1943 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 1944 | CURLcode result;
|
---|
| 1945 | struct SessionHandle *data=conn->data;
|
---|
| 1946 | struct Curl_dns_entry *addr=NULL;
|
---|
| 1947 | int rc;
|
---|
| 1948 | unsigned short connectport; /* the local port connect() should use! */
|
---|
| 1949 | char *str=&data->state.buffer[4]; /* start on the first letter */
|
---|
| 1950 |
|
---|
| 1951 | /* if we come here again, make sure the former name is cleared */
|
---|
| 1952 | Curl_safefree(ftpc->newhost);
|
---|
| 1953 |
|
---|
| 1954 | if((ftpc->count1 == 0) &&
|
---|
| 1955 | (ftpcode == 229)) {
|
---|
| 1956 | /* positive EPSV response */
|
---|
| 1957 | char *ptr = strchr(str, '(');
|
---|
| 1958 | if(ptr) {
|
---|
| 1959 | unsigned int num;
|
---|
| 1960 | char separator[4];
|
---|
| 1961 | ptr++;
|
---|
| 1962 | if(5 == sscanf(ptr, "%c%c%c%u%c",
|
---|
| 1963 | &separator[0],
|
---|
| 1964 | &separator[1],
|
---|
| 1965 | &separator[2],
|
---|
| 1966 | &num,
|
---|
| 1967 | &separator[3])) {
|
---|
| 1968 | const char sep1 = separator[0];
|
---|
| 1969 | int i;
|
---|
| 1970 |
|
---|
| 1971 | /* The four separators should be identical, or else this is an oddly
|
---|
| 1972 | formatted reply and we bail out immediately. */
|
---|
| 1973 | for(i=1; i<4; i++) {
|
---|
| 1974 | if(separator[i] != sep1) {
|
---|
| 1975 | ptr=NULL; /* set to NULL to signal error */
|
---|
| 1976 | break;
|
---|
| 1977 | }
|
---|
| 1978 | }
|
---|
| 1979 | if(num > 0xffff) {
|
---|
| 1980 | failf(data, "Illegal port number in EPSV reply");
|
---|
| 1981 | return CURLE_FTP_WEIRD_PASV_REPLY;
|
---|
| 1982 | }
|
---|
| 1983 | if(ptr) {
|
---|
| 1984 | ftpc->newport = (unsigned short)(num & 0xffff);
|
---|
| 1985 | ftpc->newhost = strdup(control_address(conn));
|
---|
| 1986 | if(!ftpc->newhost)
|
---|
| 1987 | return CURLE_OUT_OF_MEMORY;
|
---|
| 1988 | }
|
---|
| 1989 | }
|
---|
| 1990 | else
|
---|
| 1991 | ptr=NULL;
|
---|
| 1992 | }
|
---|
| 1993 | if(!ptr) {
|
---|
| 1994 | failf(data, "Weirdly formatted EPSV reply");
|
---|
| 1995 | return CURLE_FTP_WEIRD_PASV_REPLY;
|
---|
| 1996 | }
|
---|
| 1997 | }
|
---|
| 1998 | else if((ftpc->count1 == 1) &&
|
---|
| 1999 | (ftpcode == 227)) {
|
---|
| 2000 | /* positive PASV response */
|
---|
| 2001 | int ip[4];
|
---|
| 2002 | int port[2];
|
---|
| 2003 |
|
---|
| 2004 | /*
|
---|
| 2005 | * Scan for a sequence of six comma-separated numbers and use them as
|
---|
| 2006 | * IP+port indicators.
|
---|
| 2007 | *
|
---|
| 2008 | * Found reply-strings include:
|
---|
| 2009 | * "227 Entering Passive Mode (127,0,0,1,4,51)"
|
---|
| 2010 | * "227 Data transfer will passively listen to 127,0,0,1,4,51"
|
---|
| 2011 | * "227 Entering passive mode. 127,0,0,1,4,51"
|
---|
| 2012 | */
|
---|
| 2013 | while(*str) {
|
---|
| 2014 | if(6 == sscanf(str, "%d,%d,%d,%d,%d,%d",
|
---|
| 2015 | &ip[0], &ip[1], &ip[2], &ip[3],
|
---|
| 2016 | &port[0], &port[1]))
|
---|
| 2017 | break;
|
---|
| 2018 | str++;
|
---|
| 2019 | }
|
---|
| 2020 |
|
---|
| 2021 | if(!*str) {
|
---|
| 2022 | failf(data, "Couldn't interpret the 227-response");
|
---|
| 2023 | return CURLE_FTP_WEIRD_227_FORMAT;
|
---|
| 2024 | }
|
---|
| 2025 |
|
---|
| 2026 | /* we got OK from server */
|
---|
| 2027 | if(data->set.ftp_skip_ip) {
|
---|
| 2028 | /* told to ignore the remotely given IP but instead use the host we used
|
---|
| 2029 | for the control connection */
|
---|
| 2030 | infof(data, "Skip %d.%d.%d.%d for data connection, re-use %s instead\n",
|
---|
| 2031 | ip[0], ip[1], ip[2], ip[3],
|
---|
| 2032 | conn->host.name);
|
---|
| 2033 | ftpc->newhost = strdup(control_address(conn));
|
---|
| 2034 | }
|
---|
| 2035 | else
|
---|
| 2036 | ftpc->newhost = aprintf("%d.%d.%d.%d", ip[0], ip[1], ip[2], ip[3]);
|
---|
| 2037 |
|
---|
| 2038 | if(!ftpc->newhost)
|
---|
| 2039 | return CURLE_OUT_OF_MEMORY;
|
---|
| 2040 |
|
---|
| 2041 | ftpc->newport = (unsigned short)(((port[0]<<8) + port[1]) & 0xffff);
|
---|
| 2042 | }
|
---|
| 2043 | else if(ftpc->count1 == 0) {
|
---|
| 2044 | /* EPSV failed, move on to PASV */
|
---|
| 2045 | return ftp_epsv_disable(conn);
|
---|
| 2046 | }
|
---|
| 2047 | else {
|
---|
| 2048 | failf(data, "Bad PASV/EPSV response: %03d", ftpcode);
|
---|
| 2049 | return CURLE_FTP_WEIRD_PASV_REPLY;
|
---|
| 2050 | }
|
---|
| 2051 |
|
---|
| 2052 | if(conn->bits.proxy) {
|
---|
| 2053 | /*
|
---|
| 2054 | * This connection uses a proxy and we need to connect to the proxy again
|
---|
| 2055 | * here. We don't want to rely on a former host lookup that might've
|
---|
| 2056 | * expired now, instead we remake the lookup here and now!
|
---|
| 2057 | */
|
---|
| 2058 | rc = Curl_resolv(conn, conn->proxy.name, (int)conn->port, &addr);
|
---|
| 2059 | if(rc == CURLRESOLV_PENDING)
|
---|
| 2060 | /* BLOCKING, ignores the return code but 'addr' will be NULL in
|
---|
| 2061 | case of failure */
|
---|
| 2062 | (void)Curl_resolver_wait_resolv(conn, &addr);
|
---|
| 2063 |
|
---|
| 2064 | connectport =
|
---|
| 2065 | (unsigned short)conn->port; /* we connect to the proxy's port */
|
---|
| 2066 |
|
---|
| 2067 | if(!addr) {
|
---|
| 2068 | failf(data, "Can't resolve proxy host %s:%hu",
|
---|
| 2069 | conn->proxy.name, connectport);
|
---|
| 2070 | return CURLE_FTP_CANT_GET_HOST;
|
---|
| 2071 | }
|
---|
| 2072 | }
|
---|
| 2073 | else {
|
---|
| 2074 | /* normal, direct, ftp connection */
|
---|
| 2075 | rc = Curl_resolv(conn, ftpc->newhost, ftpc->newport, &addr);
|
---|
| 2076 | if(rc == CURLRESOLV_PENDING)
|
---|
| 2077 | /* BLOCKING */
|
---|
| 2078 | (void)Curl_resolver_wait_resolv(conn, &addr);
|
---|
| 2079 |
|
---|
| 2080 | connectport = ftpc->newport; /* we connect to the remote port */
|
---|
| 2081 |
|
---|
| 2082 | if(!addr) {
|
---|
| 2083 | failf(data, "Can't resolve new host %s:%hu", ftpc->newhost, connectport);
|
---|
| 2084 | return CURLE_FTP_CANT_GET_HOST;
|
---|
| 2085 | }
|
---|
| 2086 | }
|
---|
| 2087 |
|
---|
| 2088 | conn->bits.tcpconnect[SECONDARYSOCKET] = FALSE;
|
---|
| 2089 | result = Curl_connecthost(conn, addr);
|
---|
| 2090 |
|
---|
| 2091 | if(result) {
|
---|
| 2092 | Curl_resolv_unlock(data, addr); /* we're done using this address */
|
---|
| 2093 | if(ftpc->count1 == 0 && ftpcode == 229)
|
---|
| 2094 | return ftp_epsv_disable(conn);
|
---|
| 2095 |
|
---|
| 2096 | return result;
|
---|
| 2097 | }
|
---|
| 2098 |
|
---|
| 2099 |
|
---|
| 2100 | /*
|
---|
| 2101 | * When this is used from the multi interface, this might've returned with
|
---|
| 2102 | * the 'connected' set to FALSE and thus we are now awaiting a non-blocking
|
---|
| 2103 | * connect to connect.
|
---|
| 2104 | */
|
---|
| 2105 |
|
---|
| 2106 | if(data->set.verbose)
|
---|
| 2107 | /* this just dumps information about this second connection */
|
---|
| 2108 | ftp_pasv_verbose(conn, addr->addr, ftpc->newhost, connectport);
|
---|
| 2109 |
|
---|
| 2110 | Curl_resolv_unlock(data, addr); /* we're done using this address */
|
---|
| 2111 | conn->bits.do_more = TRUE;
|
---|
| 2112 | state(conn, FTP_STOP); /* this phase is completed */
|
---|
| 2113 |
|
---|
| 2114 | return result;
|
---|
| 2115 | }
|
---|
| 2116 |
|
---|
| 2117 | static CURLcode ftp_state_port_resp(struct connectdata *conn,
|
---|
| 2118 | int ftpcode)
|
---|
| 2119 | {
|
---|
| 2120 | struct SessionHandle *data = conn->data;
|
---|
| 2121 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2122 | ftpport fcmd = (ftpport)ftpc->count1;
|
---|
| 2123 | CURLcode result = CURLE_OK;
|
---|
| 2124 |
|
---|
| 2125 | /* The FTP spec tells a positive response should have code 200.
|
---|
| 2126 | Be more permissive here to tolerate deviant servers. */
|
---|
| 2127 | if(ftpcode / 100 != 2) {
|
---|
| 2128 | /* the command failed */
|
---|
| 2129 |
|
---|
| 2130 | if(EPRT == fcmd) {
|
---|
| 2131 | infof(data, "disabling EPRT usage\n");
|
---|
| 2132 | conn->bits.ftp_use_eprt = FALSE;
|
---|
| 2133 | }
|
---|
| 2134 | fcmd++;
|
---|
| 2135 |
|
---|
| 2136 | if(fcmd == DONE) {
|
---|
| 2137 | failf(data, "Failed to do PORT");
|
---|
| 2138 | result = CURLE_FTP_PORT_FAILED;
|
---|
| 2139 | }
|
---|
| 2140 | else
|
---|
| 2141 | /* try next */
|
---|
| 2142 | result = ftp_state_use_port(conn, fcmd);
|
---|
| 2143 | }
|
---|
| 2144 | else {
|
---|
| 2145 | infof(data, "Connect data stream actively\n");
|
---|
| 2146 | state(conn, FTP_STOP); /* end of DO phase */
|
---|
| 2147 | result = ftp_dophase_done(conn, FALSE);
|
---|
| 2148 | }
|
---|
| 2149 |
|
---|
| 2150 | return result;
|
---|
| 2151 | }
|
---|
| 2152 |
|
---|
| 2153 | static CURLcode ftp_state_mdtm_resp(struct connectdata *conn,
|
---|
| 2154 | int ftpcode)
|
---|
| 2155 | {
|
---|
| 2156 | CURLcode result = CURLE_OK;
|
---|
| 2157 | struct SessionHandle *data=conn->data;
|
---|
| 2158 | struct FTP *ftp = data->req.protop;
|
---|
| 2159 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2160 |
|
---|
| 2161 | switch(ftpcode) {
|
---|
| 2162 | case 213:
|
---|
| 2163 | {
|
---|
| 2164 | /* we got a time. Format should be: "YYYYMMDDHHMMSS[.sss]" where the
|
---|
| 2165 | last .sss part is optional and means fractions of a second */
|
---|
| 2166 | int year, month, day, hour, minute, second;
|
---|
| 2167 | char *buf = data->state.buffer;
|
---|
| 2168 | if(6 == sscanf(buf+4, "%04d%02d%02d%02d%02d%02d",
|
---|
| 2169 | &year, &month, &day, &hour, &minute, &second)) {
|
---|
| 2170 | /* we have a time, reformat it */
|
---|
| 2171 | time_t secs=time(NULL);
|
---|
| 2172 | /* using the good old yacc/bison yuck */
|
---|
| 2173 | snprintf(buf, sizeof(conn->data->state.buffer),
|
---|
| 2174 | "%04d%02d%02d %02d:%02d:%02d GMT",
|
---|
| 2175 | year, month, day, hour, minute, second);
|
---|
| 2176 | /* now, convert this into a time() value: */
|
---|
| 2177 | data->info.filetime = (long)curl_getdate(buf, &secs);
|
---|
| 2178 | }
|
---|
| 2179 |
|
---|
| 2180 | #ifdef CURL_FTP_HTTPSTYLE_HEAD
|
---|
| 2181 | /* If we asked for a time of the file and we actually got one as well,
|
---|
| 2182 | we "emulate" a HTTP-style header in our output. */
|
---|
| 2183 |
|
---|
| 2184 | if(data->set.opt_no_body &&
|
---|
| 2185 | ftpc->file &&
|
---|
| 2186 | data->set.get_filetime &&
|
---|
| 2187 | (data->info.filetime>=0) ) {
|
---|
| 2188 | time_t filetime = (time_t)data->info.filetime;
|
---|
| 2189 | struct tm buffer;
|
---|
| 2190 | const struct tm *tm = &buffer;
|
---|
| 2191 |
|
---|
| 2192 | result = Curl_gmtime(filetime, &buffer);
|
---|
| 2193 | if(result)
|
---|
| 2194 | return result;
|
---|
| 2195 |
|
---|
| 2196 | /* format: "Tue, 15 Nov 1994 12:45:26" */
|
---|
| 2197 | snprintf(buf, BUFSIZE-1,
|
---|
| 2198 | "Last-Modified: %s, %02d %s %4d %02d:%02d:%02d GMT\r\n",
|
---|
| 2199 | Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
|
---|
| 2200 | tm->tm_mday,
|
---|
| 2201 | Curl_month[tm->tm_mon],
|
---|
| 2202 | tm->tm_year + 1900,
|
---|
| 2203 | tm->tm_hour,
|
---|
| 2204 | tm->tm_min,
|
---|
| 2205 | tm->tm_sec);
|
---|
| 2206 | result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
|
---|
| 2207 | if(result)
|
---|
| 2208 | return result;
|
---|
| 2209 | } /* end of a ridiculous amount of conditionals */
|
---|
| 2210 | #endif
|
---|
| 2211 | }
|
---|
| 2212 | break;
|
---|
| 2213 | default:
|
---|
| 2214 | infof(data, "unsupported MDTM reply format\n");
|
---|
| 2215 | break;
|
---|
| 2216 | case 550: /* "No such file or directory" */
|
---|
| 2217 | failf(data, "Given file does not exist");
|
---|
| 2218 | result = CURLE_FTP_COULDNT_RETR_FILE;
|
---|
| 2219 | break;
|
---|
| 2220 | }
|
---|
| 2221 |
|
---|
| 2222 | if(data->set.timecondition) {
|
---|
| 2223 | if((data->info.filetime > 0) && (data->set.timevalue > 0)) {
|
---|
| 2224 | switch(data->set.timecondition) {
|
---|
| 2225 | case CURL_TIMECOND_IFMODSINCE:
|
---|
| 2226 | default:
|
---|
| 2227 | if(data->info.filetime <= data->set.timevalue) {
|
---|
| 2228 | infof(data, "The requested document is not new enough\n");
|
---|
| 2229 | ftp->transfer = FTPTRANSFER_NONE; /* mark to not transfer data */
|
---|
| 2230 | data->info.timecond = TRUE;
|
---|
| 2231 | state(conn, FTP_STOP);
|
---|
| 2232 | return CURLE_OK;
|
---|
| 2233 | }
|
---|
| 2234 | break;
|
---|
| 2235 | case CURL_TIMECOND_IFUNMODSINCE:
|
---|
| 2236 | if(data->info.filetime > data->set.timevalue) {
|
---|
| 2237 | infof(data, "The requested document is not old enough\n");
|
---|
| 2238 | ftp->transfer = FTPTRANSFER_NONE; /* mark to not transfer data */
|
---|
| 2239 | data->info.timecond = TRUE;
|
---|
| 2240 | state(conn, FTP_STOP);
|
---|
| 2241 | return CURLE_OK;
|
---|
| 2242 | }
|
---|
| 2243 | break;
|
---|
| 2244 | } /* switch */
|
---|
| 2245 | }
|
---|
| 2246 | else {
|
---|
| 2247 | infof(data, "Skipping time comparison\n");
|
---|
| 2248 | }
|
---|
| 2249 | }
|
---|
| 2250 |
|
---|
| 2251 | if(!result)
|
---|
| 2252 | result = ftp_state_type(conn);
|
---|
| 2253 |
|
---|
| 2254 | return result;
|
---|
| 2255 | }
|
---|
| 2256 |
|
---|
| 2257 | static CURLcode ftp_state_type_resp(struct connectdata *conn,
|
---|
| 2258 | int ftpcode,
|
---|
| 2259 | ftpstate instate)
|
---|
| 2260 | {
|
---|
| 2261 | CURLcode result = CURLE_OK;
|
---|
| 2262 | struct SessionHandle *data=conn->data;
|
---|
| 2263 |
|
---|
| 2264 | if(ftpcode/100 != 2) {
|
---|
| 2265 | /* "sasserftpd" and "(u)r(x)bot ftpd" both responds with 226 after a
|
---|
| 2266 | successful 'TYPE I'. While that is not as RFC959 says, it is still a
|
---|
| 2267 | positive response code and we allow that. */
|
---|
| 2268 | failf(data, "Couldn't set desired mode");
|
---|
| 2269 | return CURLE_FTP_COULDNT_SET_TYPE;
|
---|
| 2270 | }
|
---|
| 2271 | if(ftpcode != 200)
|
---|
| 2272 | infof(data, "Got a %03d response code instead of the assumed 200\n",
|
---|
| 2273 | ftpcode);
|
---|
| 2274 |
|
---|
| 2275 | if(instate == FTP_TYPE)
|
---|
| 2276 | result = ftp_state_size(conn);
|
---|
| 2277 | else if(instate == FTP_LIST_TYPE)
|
---|
| 2278 | result = ftp_state_list(conn);
|
---|
| 2279 | else if(instate == FTP_RETR_TYPE)
|
---|
| 2280 | result = ftp_state_retr_prequote(conn);
|
---|
| 2281 | else if(instate == FTP_STOR_TYPE)
|
---|
| 2282 | result = ftp_state_stor_prequote(conn);
|
---|
| 2283 |
|
---|
| 2284 | return result;
|
---|
| 2285 | }
|
---|
| 2286 |
|
---|
| 2287 | static CURLcode ftp_state_retr(struct connectdata *conn,
|
---|
| 2288 | curl_off_t filesize)
|
---|
| 2289 | {
|
---|
| 2290 | CURLcode result = CURLE_OK;
|
---|
| 2291 | struct SessionHandle *data=conn->data;
|
---|
| 2292 | struct FTP *ftp = data->req.protop;
|
---|
| 2293 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2294 |
|
---|
| 2295 | if(data->set.max_filesize && (filesize > data->set.max_filesize)) {
|
---|
| 2296 | failf(data, "Maximum file size exceeded");
|
---|
| 2297 | return CURLE_FILESIZE_EXCEEDED;
|
---|
| 2298 | }
|
---|
| 2299 | ftp->downloadsize = filesize;
|
---|
| 2300 |
|
---|
| 2301 | if(data->state.resume_from) {
|
---|
| 2302 | /* We always (attempt to) get the size of downloads, so it is done before
|
---|
| 2303 | this even when not doing resumes. */
|
---|
| 2304 | if(filesize == -1) {
|
---|
| 2305 | infof(data, "ftp server doesn't support SIZE\n");
|
---|
| 2306 | /* We couldn't get the size and therefore we can't know if there really
|
---|
| 2307 | is a part of the file left to get, although the server will just
|
---|
| 2308 | close the connection when we start the connection so it won't cause
|
---|
| 2309 | us any harm, just not make us exit as nicely. */
|
---|
| 2310 | }
|
---|
| 2311 | else {
|
---|
| 2312 | /* We got a file size report, so we check that there actually is a
|
---|
| 2313 | part of the file left to get, or else we go home. */
|
---|
| 2314 | if(data->state.resume_from< 0) {
|
---|
| 2315 | /* We're supposed to download the last abs(from) bytes */
|
---|
| 2316 | if(filesize < -data->state.resume_from) {
|
---|
| 2317 | failf(data, "Offset (%" CURL_FORMAT_CURL_OFF_T
|
---|
| 2318 | ") was beyond file size (%" CURL_FORMAT_CURL_OFF_T ")",
|
---|
| 2319 | data->state.resume_from, filesize);
|
---|
| 2320 | return CURLE_BAD_DOWNLOAD_RESUME;
|
---|
| 2321 | }
|
---|
| 2322 | /* convert to size to download */
|
---|
| 2323 | ftp->downloadsize = -data->state.resume_from;
|
---|
| 2324 | /* download from where? */
|
---|
| 2325 | data->state.resume_from = filesize - ftp->downloadsize;
|
---|
| 2326 | }
|
---|
| 2327 | else {
|
---|
| 2328 | if(filesize < data->state.resume_from) {
|
---|
| 2329 | failf(data, "Offset (%" CURL_FORMAT_CURL_OFF_T
|
---|
| 2330 | ") was beyond file size (%" CURL_FORMAT_CURL_OFF_T ")",
|
---|
| 2331 | data->state.resume_from, filesize);
|
---|
| 2332 | return CURLE_BAD_DOWNLOAD_RESUME;
|
---|
| 2333 | }
|
---|
| 2334 | /* Now store the number of bytes we are expected to download */
|
---|
| 2335 | ftp->downloadsize = filesize-data->state.resume_from;
|
---|
| 2336 | }
|
---|
| 2337 | }
|
---|
| 2338 |
|
---|
| 2339 | if(ftp->downloadsize == 0) {
|
---|
| 2340 | /* no data to transfer */
|
---|
| 2341 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
| 2342 | infof(data, "File already completely downloaded\n");
|
---|
| 2343 |
|
---|
| 2344 | /* Set ->transfer so that we won't get any error in ftp_done()
|
---|
| 2345 | * because we didn't transfer the any file */
|
---|
| 2346 | ftp->transfer = FTPTRANSFER_NONE;
|
---|
| 2347 | state(conn, FTP_STOP);
|
---|
| 2348 | return CURLE_OK;
|
---|
| 2349 | }
|
---|
| 2350 |
|
---|
| 2351 | /* Set resume file transfer offset */
|
---|
| 2352 | infof(data, "Instructs server to resume from offset %"
|
---|
| 2353 | CURL_FORMAT_CURL_OFF_T "\n", data->state.resume_from);
|
---|
| 2354 |
|
---|
| 2355 | PPSENDF(&ftpc->pp, "REST %" CURL_FORMAT_CURL_OFF_T,
|
---|
| 2356 | data->state.resume_from);
|
---|
| 2357 |
|
---|
| 2358 | state(conn, FTP_RETR_REST);
|
---|
| 2359 | }
|
---|
| 2360 | else {
|
---|
| 2361 | /* no resume */
|
---|
| 2362 | PPSENDF(&ftpc->pp, "RETR %s", ftpc->file);
|
---|
| 2363 | state(conn, FTP_RETR);
|
---|
| 2364 | }
|
---|
| 2365 |
|
---|
| 2366 | return result;
|
---|
| 2367 | }
|
---|
| 2368 |
|
---|
| 2369 | static CURLcode ftp_state_size_resp(struct connectdata *conn,
|
---|
| 2370 | int ftpcode,
|
---|
| 2371 | ftpstate instate)
|
---|
| 2372 | {
|
---|
| 2373 | CURLcode result = CURLE_OK;
|
---|
| 2374 | struct SessionHandle *data=conn->data;
|
---|
| 2375 | curl_off_t filesize;
|
---|
| 2376 | char *buf = data->state.buffer;
|
---|
| 2377 |
|
---|
| 2378 | /* get the size from the ascii string: */
|
---|
| 2379 | filesize = (ftpcode == 213)?curlx_strtoofft(buf+4, NULL, 0):-1;
|
---|
| 2380 |
|
---|
| 2381 | if(instate == FTP_SIZE) {
|
---|
| 2382 | #ifdef CURL_FTP_HTTPSTYLE_HEAD
|
---|
| 2383 | if(-1 != filesize) {
|
---|
| 2384 | snprintf(buf, sizeof(data->state.buffer),
|
---|
| 2385 | "Content-Length: %" CURL_FORMAT_CURL_OFF_T "\r\n", filesize);
|
---|
| 2386 | result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
|
---|
| 2387 | if(result)
|
---|
| 2388 | return result;
|
---|
| 2389 | }
|
---|
| 2390 | #endif
|
---|
| 2391 | Curl_pgrsSetDownloadSize(data, filesize);
|
---|
| 2392 | result = ftp_state_rest(conn);
|
---|
| 2393 | }
|
---|
| 2394 | else if(instate == FTP_RETR_SIZE) {
|
---|
| 2395 | Curl_pgrsSetDownloadSize(data, filesize);
|
---|
| 2396 | result = ftp_state_retr(conn, filesize);
|
---|
| 2397 | }
|
---|
| 2398 | else if(instate == FTP_STOR_SIZE) {
|
---|
| 2399 | data->state.resume_from = filesize;
|
---|
| 2400 | result = ftp_state_ul_setup(conn, TRUE);
|
---|
| 2401 | }
|
---|
| 2402 |
|
---|
| 2403 | return result;
|
---|
| 2404 | }
|
---|
| 2405 |
|
---|
| 2406 | static CURLcode ftp_state_rest_resp(struct connectdata *conn,
|
---|
| 2407 | int ftpcode,
|
---|
| 2408 | ftpstate instate)
|
---|
| 2409 | {
|
---|
| 2410 | CURLcode result = CURLE_OK;
|
---|
| 2411 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2412 |
|
---|
| 2413 | switch(instate) {
|
---|
| 2414 | case FTP_REST:
|
---|
| 2415 | default:
|
---|
| 2416 | #ifdef CURL_FTP_HTTPSTYLE_HEAD
|
---|
| 2417 | if(ftpcode == 350) {
|
---|
| 2418 | char buffer[24]= { "Accept-ranges: bytes\r\n" };
|
---|
| 2419 | result = Curl_client_write(conn, CLIENTWRITE_BOTH, buffer, 0);
|
---|
| 2420 | if(result)
|
---|
| 2421 | return result;
|
---|
| 2422 | }
|
---|
| 2423 | #endif
|
---|
| 2424 | result = ftp_state_prepare_transfer(conn);
|
---|
| 2425 | break;
|
---|
| 2426 |
|
---|
| 2427 | case FTP_RETR_REST:
|
---|
| 2428 | if(ftpcode != 350) {
|
---|
| 2429 | failf(conn->data, "Couldn't use REST");
|
---|
| 2430 | result = CURLE_FTP_COULDNT_USE_REST;
|
---|
| 2431 | }
|
---|
| 2432 | else {
|
---|
| 2433 | PPSENDF(&ftpc->pp, "RETR %s", ftpc->file);
|
---|
| 2434 | state(conn, FTP_RETR);
|
---|
| 2435 | }
|
---|
| 2436 | break;
|
---|
| 2437 | }
|
---|
| 2438 |
|
---|
| 2439 | return result;
|
---|
| 2440 | }
|
---|
| 2441 |
|
---|
| 2442 | static CURLcode ftp_state_stor_resp(struct connectdata *conn,
|
---|
| 2443 | int ftpcode, ftpstate instate)
|
---|
| 2444 | {
|
---|
| 2445 | CURLcode result = CURLE_OK;
|
---|
| 2446 | struct SessionHandle *data = conn->data;
|
---|
| 2447 |
|
---|
| 2448 | if(ftpcode>=400) {
|
---|
| 2449 | failf(data, "Failed FTP upload: %0d", ftpcode);
|
---|
| 2450 | state(conn, FTP_STOP);
|
---|
| 2451 | /* oops, we never close the sockets! */
|
---|
| 2452 | return CURLE_UPLOAD_FAILED;
|
---|
| 2453 | }
|
---|
| 2454 |
|
---|
| 2455 | conn->proto.ftpc.state_saved = instate;
|
---|
| 2456 |
|
---|
| 2457 | /* PORT means we are now awaiting the server to connect to us. */
|
---|
| 2458 | if(data->set.ftp_use_port) {
|
---|
| 2459 | bool connected;
|
---|
| 2460 |
|
---|
| 2461 | state(conn, FTP_STOP); /* no longer in STOR state */
|
---|
| 2462 |
|
---|
| 2463 | result = AllowServerConnect(conn, &connected);
|
---|
| 2464 | if(result)
|
---|
| 2465 | return result;
|
---|
| 2466 |
|
---|
| 2467 | if(!connected) {
|
---|
| 2468 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2469 | infof(data, "Data conn was not available immediately\n");
|
---|
| 2470 | ftpc->wait_data_conn = TRUE;
|
---|
| 2471 | }
|
---|
| 2472 |
|
---|
| 2473 | return CURLE_OK;
|
---|
| 2474 | }
|
---|
| 2475 | else
|
---|
| 2476 | return InitiateTransfer(conn);
|
---|
| 2477 | }
|
---|
| 2478 |
|
---|
| 2479 | /* for LIST and RETR responses */
|
---|
| 2480 | static CURLcode ftp_state_get_resp(struct connectdata *conn,
|
---|
| 2481 | int ftpcode,
|
---|
| 2482 | ftpstate instate)
|
---|
| 2483 | {
|
---|
| 2484 | CURLcode result = CURLE_OK;
|
---|
| 2485 | struct SessionHandle *data = conn->data;
|
---|
| 2486 | struct FTP *ftp = data->req.protop;
|
---|
| 2487 | char *buf = data->state.buffer;
|
---|
| 2488 |
|
---|
| 2489 | if((ftpcode == 150) || (ftpcode == 125)) {
|
---|
| 2490 |
|
---|
| 2491 | /*
|
---|
| 2492 | A;
|
---|
| 2493 | 150 Opening BINARY mode data connection for /etc/passwd (2241
|
---|
| 2494 | bytes). (ok, the file is being transferred)
|
---|
| 2495 |
|
---|
| 2496 | B:
|
---|
| 2497 | 150 Opening ASCII mode data connection for /bin/ls
|
---|
| 2498 |
|
---|
| 2499 | C:
|
---|
| 2500 | 150 ASCII data connection for /bin/ls (137.167.104.91,37445) (0 bytes).
|
---|
| 2501 |
|
---|
| 2502 | D:
|
---|
| 2503 | 150 Opening ASCII mode data connection for [file] (0.0.0.0,0) (545 bytes)
|
---|
| 2504 |
|
---|
| 2505 | E:
|
---|
| 2506 | 125 Data connection already open; Transfer starting. */
|
---|
| 2507 |
|
---|
| 2508 | curl_off_t size=-1; /* default unknown size */
|
---|
| 2509 |
|
---|
| 2510 |
|
---|
| 2511 | /*
|
---|
| 2512 | * It appears that there are FTP-servers that return size 0 for files when
|
---|
| 2513 | * SIZE is used on the file while being in BINARY mode. To work around
|
---|
| 2514 | * that (stupid) behavior, we attempt to parse the RETR response even if
|
---|
| 2515 | * the SIZE returned size zero.
|
---|
| 2516 | *
|
---|
| 2517 | * Debugging help from Salvatore Sorrentino on February 26, 2003.
|
---|
| 2518 | */
|
---|
| 2519 |
|
---|
| 2520 | if((instate != FTP_LIST) &&
|
---|
| 2521 | !data->set.prefer_ascii &&
|
---|
| 2522 | (ftp->downloadsize < 1)) {
|
---|
| 2523 | /*
|
---|
| 2524 | * It seems directory listings either don't show the size or very
|
---|
| 2525 | * often uses size 0 anyway. ASCII transfers may very well turn out
|
---|
| 2526 | * that the transferred amount of data is not the same as this line
|
---|
| 2527 | * tells, why using this number in those cases only confuses us.
|
---|
| 2528 | *
|
---|
| 2529 | * Example D above makes this parsing a little tricky */
|
---|
| 2530 | char *bytes;
|
---|
| 2531 | bytes=strstr(buf, " bytes");
|
---|
| 2532 | if(bytes--) {
|
---|
| 2533 | long in=(long)(bytes-buf);
|
---|
| 2534 | /* this is a hint there is size information in there! ;-) */
|
---|
| 2535 | while(--in) {
|
---|
| 2536 | /* scan for the left parenthesis and break there */
|
---|
| 2537 | if('(' == *bytes)
|
---|
| 2538 | break;
|
---|
| 2539 | /* skip only digits */
|
---|
| 2540 | if(!ISDIGIT(*bytes)) {
|
---|
| 2541 | bytes=NULL;
|
---|
| 2542 | break;
|
---|
| 2543 | }
|
---|
| 2544 | /* one more estep backwards */
|
---|
| 2545 | bytes--;
|
---|
| 2546 | }
|
---|
| 2547 | /* if we have nothing but digits: */
|
---|
| 2548 | if(bytes++) {
|
---|
| 2549 | /* get the number! */
|
---|
| 2550 | size = curlx_strtoofft(bytes, NULL, 0);
|
---|
| 2551 | }
|
---|
| 2552 | }
|
---|
| 2553 | }
|
---|
| 2554 | else if(ftp->downloadsize > -1)
|
---|
| 2555 | size = ftp->downloadsize;
|
---|
| 2556 |
|
---|
| 2557 | if(size > data->req.maxdownload && data->req.maxdownload > 0)
|
---|
| 2558 | size = data->req.size = data->req.maxdownload;
|
---|
| 2559 | else if((instate != FTP_LIST) && (data->set.prefer_ascii))
|
---|
| 2560 | size = -1; /* kludge for servers that understate ASCII mode file size */
|
---|
| 2561 |
|
---|
| 2562 | infof(data, "Maxdownload = %" CURL_FORMAT_CURL_OFF_T "\n",
|
---|
| 2563 | data->req.maxdownload);
|
---|
| 2564 |
|
---|
| 2565 | if(instate != FTP_LIST)
|
---|
| 2566 | infof(data, "Getting file with size: %" CURL_FORMAT_CURL_OFF_T "\n",
|
---|
| 2567 | size);
|
---|
| 2568 |
|
---|
| 2569 | /* FTP download: */
|
---|
| 2570 | conn->proto.ftpc.state_saved = instate;
|
---|
| 2571 | conn->proto.ftpc.retr_size_saved = size;
|
---|
| 2572 |
|
---|
| 2573 | if(data->set.ftp_use_port) {
|
---|
| 2574 | bool connected;
|
---|
| 2575 |
|
---|
| 2576 | result = AllowServerConnect(conn, &connected);
|
---|
| 2577 | if(result)
|
---|
| 2578 | return result;
|
---|
| 2579 |
|
---|
| 2580 | if(!connected) {
|
---|
| 2581 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2582 | infof(data, "Data conn was not available immediately\n");
|
---|
| 2583 | state(conn, FTP_STOP);
|
---|
| 2584 | ftpc->wait_data_conn = TRUE;
|
---|
| 2585 | }
|
---|
| 2586 | }
|
---|
| 2587 | else
|
---|
| 2588 | return InitiateTransfer(conn);
|
---|
| 2589 | }
|
---|
| 2590 | else {
|
---|
| 2591 | if((instate == FTP_LIST) && (ftpcode == 450)) {
|
---|
| 2592 | /* simply no matching files in the dir listing */
|
---|
| 2593 | ftp->transfer = FTPTRANSFER_NONE; /* don't download anything */
|
---|
| 2594 | state(conn, FTP_STOP); /* this phase is over */
|
---|
| 2595 | }
|
---|
| 2596 | else {
|
---|
| 2597 | failf(data, "RETR response: %03d", ftpcode);
|
---|
| 2598 | return instate == FTP_RETR && ftpcode == 550?
|
---|
| 2599 | CURLE_REMOTE_FILE_NOT_FOUND:
|
---|
| 2600 | CURLE_FTP_COULDNT_RETR_FILE;
|
---|
| 2601 | }
|
---|
| 2602 | }
|
---|
| 2603 |
|
---|
| 2604 | return result;
|
---|
| 2605 | }
|
---|
| 2606 |
|
---|
| 2607 | /* after USER, PASS and ACCT */
|
---|
| 2608 | static CURLcode ftp_state_loggedin(struct connectdata *conn)
|
---|
| 2609 | {
|
---|
| 2610 | CURLcode result = CURLE_OK;
|
---|
| 2611 |
|
---|
| 2612 | if(conn->ssl[FIRSTSOCKET].use) {
|
---|
| 2613 | /* PBSZ = PROTECTION BUFFER SIZE.
|
---|
| 2614 |
|
---|
| 2615 | The 'draft-murray-auth-ftp-ssl' (draft 12, page 7) says:
|
---|
| 2616 |
|
---|
| 2617 | Specifically, the PROT command MUST be preceded by a PBSZ
|
---|
| 2618 | command and a PBSZ command MUST be preceded by a successful
|
---|
| 2619 | security data exchange (the TLS negotiation in this case)
|
---|
| 2620 |
|
---|
| 2621 | ... (and on page 8):
|
---|
| 2622 |
|
---|
| 2623 | Thus the PBSZ command must still be issued, but must have a
|
---|
| 2624 | parameter of '0' to indicate that no buffering is taking place
|
---|
| 2625 | and the data connection should not be encapsulated.
|
---|
| 2626 | */
|
---|
| 2627 | PPSENDF(&conn->proto.ftpc.pp, "PBSZ %d", 0);
|
---|
| 2628 | state(conn, FTP_PBSZ);
|
---|
| 2629 | }
|
---|
| 2630 | else {
|
---|
| 2631 | result = ftp_state_pwd(conn);
|
---|
| 2632 | }
|
---|
| 2633 | return result;
|
---|
| 2634 | }
|
---|
| 2635 |
|
---|
| 2636 | /* for USER and PASS responses */
|
---|
| 2637 | static CURLcode ftp_state_user_resp(struct connectdata *conn,
|
---|
| 2638 | int ftpcode,
|
---|
| 2639 | ftpstate instate)
|
---|
| 2640 | {
|
---|
| 2641 | CURLcode result = CURLE_OK;
|
---|
| 2642 | struct SessionHandle *data = conn->data;
|
---|
| 2643 | struct FTP *ftp = data->req.protop;
|
---|
| 2644 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2645 | (void)instate; /* no use for this yet */
|
---|
| 2646 |
|
---|
| 2647 | /* some need password anyway, and others just return 2xx ignored */
|
---|
| 2648 | if((ftpcode == 331) && (ftpc->state == FTP_USER)) {
|
---|
| 2649 | /* 331 Password required for ...
|
---|
| 2650 | (the server requires to send the user's password too) */
|
---|
| 2651 | PPSENDF(&ftpc->pp, "PASS %s", ftp->passwd?ftp->passwd:"");
|
---|
| 2652 | state(conn, FTP_PASS);
|
---|
| 2653 | }
|
---|
| 2654 | else if(ftpcode/100 == 2) {
|
---|
| 2655 | /* 230 User ... logged in.
|
---|
| 2656 | (the user logged in with or without password) */
|
---|
| 2657 | result = ftp_state_loggedin(conn);
|
---|
| 2658 | }
|
---|
| 2659 | else if(ftpcode == 332) {
|
---|
| 2660 | if(data->set.str[STRING_FTP_ACCOUNT]) {
|
---|
| 2661 | PPSENDF(&ftpc->pp, "ACCT %s", data->set.str[STRING_FTP_ACCOUNT]);
|
---|
| 2662 | state(conn, FTP_ACCT);
|
---|
| 2663 | }
|
---|
| 2664 | else {
|
---|
| 2665 | failf(data, "ACCT requested but none available");
|
---|
| 2666 | result = CURLE_LOGIN_DENIED;
|
---|
| 2667 | }
|
---|
| 2668 | }
|
---|
| 2669 | else {
|
---|
| 2670 | /* All other response codes, like:
|
---|
| 2671 |
|
---|
| 2672 | 530 User ... access denied
|
---|
| 2673 | (the server denies to log the specified user) */
|
---|
| 2674 |
|
---|
| 2675 | if(conn->data->set.str[STRING_FTP_ALTERNATIVE_TO_USER] &&
|
---|
| 2676 | !conn->data->state.ftp_trying_alternative) {
|
---|
| 2677 | /* Ok, USER failed. Let's try the supplied command. */
|
---|
| 2678 | PPSENDF(&conn->proto.ftpc.pp, "%s",
|
---|
| 2679 | conn->data->set.str[STRING_FTP_ALTERNATIVE_TO_USER]);
|
---|
| 2680 | conn->data->state.ftp_trying_alternative = TRUE;
|
---|
| 2681 | state(conn, FTP_USER);
|
---|
| 2682 | result = CURLE_OK;
|
---|
| 2683 | }
|
---|
| 2684 | else {
|
---|
| 2685 | failf(data, "Access denied: %03d", ftpcode);
|
---|
| 2686 | result = CURLE_LOGIN_DENIED;
|
---|
| 2687 | }
|
---|
| 2688 | }
|
---|
| 2689 | return result;
|
---|
| 2690 | }
|
---|
| 2691 |
|
---|
| 2692 | /* for ACCT response */
|
---|
| 2693 | static CURLcode ftp_state_acct_resp(struct connectdata *conn,
|
---|
| 2694 | int ftpcode)
|
---|
| 2695 | {
|
---|
| 2696 | CURLcode result = CURLE_OK;
|
---|
| 2697 | struct SessionHandle *data = conn->data;
|
---|
| 2698 | if(ftpcode != 230) {
|
---|
| 2699 | failf(data, "ACCT rejected by server: %03d", ftpcode);
|
---|
| 2700 | result = CURLE_FTP_WEIRD_PASS_REPLY; /* FIX */
|
---|
| 2701 | }
|
---|
| 2702 | else
|
---|
| 2703 | result = ftp_state_loggedin(conn);
|
---|
| 2704 |
|
---|
| 2705 | return result;
|
---|
| 2706 | }
|
---|
| 2707 |
|
---|
| 2708 |
|
---|
| 2709 | static CURLcode ftp_statemach_act(struct connectdata *conn)
|
---|
| 2710 | {
|
---|
| 2711 | CURLcode result;
|
---|
| 2712 | curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
---|
| 2713 | struct SessionHandle *data=conn->data;
|
---|
| 2714 | int ftpcode;
|
---|
| 2715 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 2716 | struct pingpong *pp = &ftpc->pp;
|
---|
| 2717 | static const char ftpauth[][4] = { "SSL", "TLS" };
|
---|
| 2718 | size_t nread = 0;
|
---|
| 2719 |
|
---|
| 2720 | if(pp->sendleft)
|
---|
| 2721 | return Curl_pp_flushsend(pp);
|
---|
| 2722 |
|
---|
| 2723 | result = ftp_readresp(sock, pp, &ftpcode, &nread);
|
---|
| 2724 | if(result)
|
---|
| 2725 | return result;
|
---|
| 2726 |
|
---|
| 2727 | if(ftpcode) {
|
---|
| 2728 | /* we have now received a full FTP server response */
|
---|
| 2729 | switch(ftpc->state) {
|
---|
| 2730 | case FTP_WAIT220:
|
---|
| 2731 | if(ftpcode == 230)
|
---|
| 2732 | /* 230 User logged in - already! */
|
---|
| 2733 | return ftp_state_user_resp(conn, ftpcode, ftpc->state);
|
---|
| 2734 | else if(ftpcode != 220) {
|
---|
| 2735 | failf(data, "Got a %03d ftp-server response when 220 was expected",
|
---|
| 2736 | ftpcode);
|
---|
| 2737 | return CURLE_FTP_WEIRD_SERVER_REPLY;
|
---|
| 2738 | }
|
---|
| 2739 |
|
---|
| 2740 | /* We have received a 220 response fine, now we proceed. */
|
---|
| 2741 | #ifdef HAVE_GSSAPI
|
---|
| 2742 | if(data->set.krb) {
|
---|
| 2743 | /* If not anonymous login, try a secure login. Note that this
|
---|
| 2744 | procedure is still BLOCKING. */
|
---|
| 2745 |
|
---|
| 2746 | Curl_sec_request_prot(conn, "private");
|
---|
| 2747 | /* We set private first as default, in case the line below fails to
|
---|
| 2748 | set a valid level */
|
---|
| 2749 | Curl_sec_request_prot(conn, data->set.str[STRING_KRB_LEVEL]);
|
---|
| 2750 |
|
---|
| 2751 | if(Curl_sec_login(conn))
|
---|
| 2752 | infof(data, "Logging in with password in cleartext!\n");
|
---|
| 2753 | else
|
---|
| 2754 | infof(data, "Authentication successful\n");
|
---|
| 2755 | }
|
---|
| 2756 | #endif
|
---|
| 2757 |
|
---|
| 2758 | if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
|
---|
| 2759 | /* We don't have a SSL/TLS connection yet, but FTPS is
|
---|
| 2760 | requested. Try a FTPS connection now */
|
---|
| 2761 |
|
---|
| 2762 | ftpc->count3=0;
|
---|
| 2763 | switch(data->set.ftpsslauth) {
|
---|
| 2764 | case CURLFTPAUTH_DEFAULT:
|
---|
| 2765 | case CURLFTPAUTH_SSL:
|
---|
| 2766 | ftpc->count2 = 1; /* add one to get next */
|
---|
| 2767 | ftpc->count1 = 0;
|
---|
| 2768 | break;
|
---|
| 2769 | case CURLFTPAUTH_TLS:
|
---|
| 2770 | ftpc->count2 = -1; /* subtract one to get next */
|
---|
| 2771 | ftpc->count1 = 1;
|
---|
| 2772 | break;
|
---|
| 2773 | default:
|
---|
| 2774 | failf(data, "unsupported parameter to CURLOPT_FTPSSLAUTH: %d",
|
---|
| 2775 | (int)data->set.ftpsslauth);
|
---|
| 2776 | return CURLE_UNKNOWN_OPTION; /* we don't know what to do */
|
---|
| 2777 | }
|
---|
| 2778 | PPSENDF(&ftpc->pp, "AUTH %s", ftpauth[ftpc->count1]);
|
---|
| 2779 | state(conn, FTP_AUTH);
|
---|
| 2780 | }
|
---|
| 2781 | else {
|
---|
| 2782 | result = ftp_state_user(conn);
|
---|
| 2783 | if(result)
|
---|
| 2784 | return result;
|
---|
| 2785 | }
|
---|
| 2786 |
|
---|
| 2787 | break;
|
---|
| 2788 |
|
---|
| 2789 | case FTP_AUTH:
|
---|
| 2790 | /* we have gotten the response to a previous AUTH command */
|
---|
| 2791 |
|
---|
| 2792 | /* RFC2228 (page 5) says:
|
---|
| 2793 | *
|
---|
| 2794 | * If the server is willing to accept the named security mechanism,
|
---|
| 2795 | * and does not require any security data, it must respond with
|
---|
| 2796 | * reply code 234/334.
|
---|
| 2797 | */
|
---|
| 2798 |
|
---|
| 2799 | if((ftpcode == 234) || (ftpcode == 334)) {
|
---|
| 2800 | /* Curl_ssl_connect is BLOCKING */
|
---|
| 2801 | result = Curl_ssl_connect(conn, FIRSTSOCKET);
|
---|
| 2802 | if(!result) {
|
---|
| 2803 | conn->ssl[SECONDARYSOCKET].use = FALSE; /* clear-text data */
|
---|
| 2804 | result = ftp_state_user(conn);
|
---|
| 2805 | }
|
---|
| 2806 | }
|
---|
| 2807 | else if(ftpc->count3 < 1) {
|
---|
| 2808 | ftpc->count3++;
|
---|
| 2809 | ftpc->count1 += ftpc->count2; /* get next attempt */
|
---|
| 2810 | result = Curl_pp_sendf(&ftpc->pp, "AUTH %s", ftpauth[ftpc->count1]);
|
---|
| 2811 | /* remain in this same state */
|
---|
| 2812 | }
|
---|
| 2813 | else {
|
---|
| 2814 | if(data->set.use_ssl > CURLUSESSL_TRY)
|
---|
| 2815 | /* we failed and CURLUSESSL_CONTROL or CURLUSESSL_ALL is set */
|
---|
| 2816 | result = CURLE_USE_SSL_FAILED;
|
---|
| 2817 | else
|
---|
| 2818 | /* ignore the failure and continue */
|
---|
| 2819 | result = ftp_state_user(conn);
|
---|
| 2820 | }
|
---|
| 2821 |
|
---|
| 2822 | if(result)
|
---|
| 2823 | return result;
|
---|
| 2824 | break;
|
---|
| 2825 |
|
---|
| 2826 | case FTP_USER:
|
---|
| 2827 | case FTP_PASS:
|
---|
| 2828 | result = ftp_state_user_resp(conn, ftpcode, ftpc->state);
|
---|
| 2829 | break;
|
---|
| 2830 |
|
---|
| 2831 | case FTP_ACCT:
|
---|
| 2832 | result = ftp_state_acct_resp(conn, ftpcode);
|
---|
| 2833 | break;
|
---|
| 2834 |
|
---|
| 2835 | case FTP_PBSZ:
|
---|
| 2836 | PPSENDF(&ftpc->pp, "PROT %c",
|
---|
| 2837 | data->set.use_ssl == CURLUSESSL_CONTROL ? 'C' : 'P');
|
---|
| 2838 | state(conn, FTP_PROT);
|
---|
| 2839 |
|
---|
| 2840 | break;
|
---|
| 2841 |
|
---|
| 2842 | case FTP_PROT:
|
---|
| 2843 | if(ftpcode/100 == 2)
|
---|
| 2844 | /* We have enabled SSL for the data connection! */
|
---|
| 2845 | conn->ssl[SECONDARYSOCKET].use =
|
---|
| 2846 | (data->set.use_ssl != CURLUSESSL_CONTROL) ? TRUE : FALSE;
|
---|
| 2847 | /* FTP servers typically responds with 500 if they decide to reject
|
---|
| 2848 | our 'P' request */
|
---|
| 2849 | else if(data->set.use_ssl > CURLUSESSL_CONTROL)
|
---|
| 2850 | /* we failed and bails out */
|
---|
| 2851 | return CURLE_USE_SSL_FAILED;
|
---|
| 2852 |
|
---|
| 2853 | if(data->set.ftp_ccc) {
|
---|
| 2854 | /* CCC - Clear Command Channel
|
---|
| 2855 | */
|
---|
| 2856 | PPSENDF(&ftpc->pp, "%s", "CCC");
|
---|
| 2857 | state(conn, FTP_CCC);
|
---|
| 2858 | }
|
---|
| 2859 | else {
|
---|
| 2860 | result = ftp_state_pwd(conn);
|
---|
| 2861 | if(result)
|
---|
| 2862 | return result;
|
---|
| 2863 | }
|
---|
| 2864 | break;
|
---|
| 2865 |
|
---|
| 2866 | case FTP_CCC:
|
---|
| 2867 | if(ftpcode < 500) {
|
---|
| 2868 | /* First shut down the SSL layer (note: this call will block) */
|
---|
| 2869 | result = Curl_ssl_shutdown(conn, FIRSTSOCKET);
|
---|
| 2870 |
|
---|
| 2871 | if(result) {
|
---|
| 2872 | failf(conn->data, "Failed to clear the command channel (CCC)");
|
---|
| 2873 | return result;
|
---|
| 2874 | }
|
---|
| 2875 | }
|
---|
| 2876 |
|
---|
| 2877 | /* Then continue as normal */
|
---|
| 2878 | result = ftp_state_pwd(conn);
|
---|
| 2879 | if(result)
|
---|
| 2880 | return result;
|
---|
| 2881 | break;
|
---|
| 2882 |
|
---|
| 2883 | case FTP_PWD:
|
---|
| 2884 | if(ftpcode == 257) {
|
---|
| 2885 | char *ptr=&data->state.buffer[4]; /* start on the first letter */
|
---|
| 2886 | char *dir;
|
---|
| 2887 | char *store;
|
---|
| 2888 |
|
---|
| 2889 | dir = malloc(nread + 1);
|
---|
| 2890 | if(!dir)
|
---|
| 2891 | return CURLE_OUT_OF_MEMORY;
|
---|
| 2892 |
|
---|
| 2893 | /* Reply format is like
|
---|
| 2894 | 257<space>[rubbish]"<directory-name>"<space><commentary> and the
|
---|
| 2895 | RFC959 says
|
---|
| 2896 |
|
---|
| 2897 | The directory name can contain any character; embedded
|
---|
| 2898 | double-quotes should be escaped by double-quotes (the
|
---|
| 2899 | "quote-doubling" convention).
|
---|
| 2900 | */
|
---|
| 2901 |
|
---|
| 2902 | /* scan for the first double-quote for non-standard responses */
|
---|
| 2903 | while(ptr < &data->state.buffer[sizeof(data->state.buffer)]
|
---|
| 2904 | && *ptr != '\n' && *ptr != '\0' && *ptr != '"')
|
---|
| 2905 | ptr++;
|
---|
| 2906 |
|
---|
| 2907 | if('\"' == *ptr) {
|
---|
| 2908 | /* it started good */
|
---|
| 2909 | ptr++;
|
---|
| 2910 | for(store = dir; *ptr;) {
|
---|
| 2911 | if('\"' == *ptr) {
|
---|
| 2912 | if('\"' == ptr[1]) {
|
---|
| 2913 | /* "quote-doubling" */
|
---|
| 2914 | *store = ptr[1];
|
---|
| 2915 | ptr++;
|
---|
| 2916 | }
|
---|
| 2917 | else {
|
---|
| 2918 | /* end of path */
|
---|
| 2919 | *store = '\0'; /* zero terminate */
|
---|
| 2920 | break; /* get out of this loop */
|
---|
| 2921 | }
|
---|
| 2922 | }
|
---|
| 2923 | else
|
---|
| 2924 | *store = *ptr;
|
---|
| 2925 | store++;
|
---|
| 2926 | ptr++;
|
---|
| 2927 | }
|
---|
| 2928 |
|
---|
| 2929 | /* If the path name does not look like an absolute path (i.e.: it
|
---|
| 2930 | does not start with a '/'), we probably need some server-dependent
|
---|
| 2931 | adjustments. For example, this is the case when connecting to
|
---|
| 2932 | an OS400 FTP server: this server supports two name syntaxes,
|
---|
| 2933 | the default one being incompatible with standard pathes. In
|
---|
| 2934 | addition, this server switches automatically to the regular path
|
---|
| 2935 | syntax when one is encountered in a command: this results in
|
---|
| 2936 | having an entrypath in the wrong syntax when later used in CWD.
|
---|
| 2937 | The method used here is to check the server OS: we do it only
|
---|
| 2938 | if the path name looks strange to minimize overhead on other
|
---|
| 2939 | systems. */
|
---|
| 2940 |
|
---|
| 2941 | if(!ftpc->server_os && dir[0] != '/') {
|
---|
| 2942 |
|
---|
| 2943 | result = Curl_pp_sendf(&ftpc->pp, "%s", "SYST");
|
---|
| 2944 | if(result) {
|
---|
| 2945 | free(dir);
|
---|
| 2946 | return result;
|
---|
| 2947 | }
|
---|
| 2948 | Curl_safefree(ftpc->entrypath);
|
---|
| 2949 | ftpc->entrypath = dir; /* remember this */
|
---|
| 2950 | infof(data, "Entry path is '%s'\n", ftpc->entrypath);
|
---|
| 2951 | /* also save it where getinfo can access it: */
|
---|
| 2952 | data->state.most_recent_ftp_entrypath = ftpc->entrypath;
|
---|
| 2953 | state(conn, FTP_SYST);
|
---|
| 2954 | break;
|
---|
| 2955 | }
|
---|
| 2956 |
|
---|
| 2957 | Curl_safefree(ftpc->entrypath);
|
---|
| 2958 | ftpc->entrypath = dir; /* remember this */
|
---|
| 2959 | infof(data, "Entry path is '%s'\n", ftpc->entrypath);
|
---|
| 2960 | /* also save it where getinfo can access it: */
|
---|
| 2961 | data->state.most_recent_ftp_entrypath = ftpc->entrypath;
|
---|
| 2962 | }
|
---|
| 2963 | else {
|
---|
| 2964 | /* couldn't get the path */
|
---|
| 2965 | free(dir);
|
---|
| 2966 | infof(data, "Failed to figure out path\n");
|
---|
| 2967 | }
|
---|
| 2968 | }
|
---|
| 2969 | state(conn, FTP_STOP); /* we are done with the CONNECT phase! */
|
---|
| 2970 | DEBUGF(infof(data, "protocol connect phase DONE\n"));
|
---|
| 2971 | break;
|
---|
| 2972 |
|
---|
| 2973 | case FTP_SYST:
|
---|
| 2974 | if(ftpcode == 215) {
|
---|
| 2975 | char *ptr=&data->state.buffer[4]; /* start on the first letter */
|
---|
| 2976 | char *os;
|
---|
| 2977 | char *store;
|
---|
| 2978 |
|
---|
| 2979 | os = malloc(nread + 1);
|
---|
| 2980 | if(!os)
|
---|
| 2981 | return CURLE_OUT_OF_MEMORY;
|
---|
| 2982 |
|
---|
| 2983 | /* Reply format is like
|
---|
| 2984 | 215<space><OS-name><space><commentary>
|
---|
| 2985 | */
|
---|
| 2986 | while(*ptr == ' ')
|
---|
| 2987 | ptr++;
|
---|
| 2988 | for(store = os; *ptr && *ptr != ' ';)
|
---|
| 2989 | *store++ = *ptr++;
|
---|
| 2990 | *store = '\0'; /* zero terminate */
|
---|
| 2991 |
|
---|
| 2992 | /* Check for special servers here. */
|
---|
| 2993 |
|
---|
| 2994 | if(strequal(os, "OS/400")) {
|
---|
| 2995 | /* Force OS400 name format 1. */
|
---|
| 2996 | result = Curl_pp_sendf(&ftpc->pp, "%s", "SITE NAMEFMT 1");
|
---|
| 2997 | if(result) {
|
---|
| 2998 | free(os);
|
---|
| 2999 | return result;
|
---|
| 3000 | }
|
---|
| 3001 | /* remember target server OS */
|
---|
| 3002 | Curl_safefree(ftpc->server_os);
|
---|
| 3003 | ftpc->server_os = os;
|
---|
| 3004 | state(conn, FTP_NAMEFMT);
|
---|
| 3005 | break;
|
---|
| 3006 | }
|
---|
| 3007 | else {
|
---|
| 3008 | /* Nothing special for the target server. */
|
---|
| 3009 | /* remember target server OS */
|
---|
| 3010 | Curl_safefree(ftpc->server_os);
|
---|
| 3011 | ftpc->server_os = os;
|
---|
| 3012 | }
|
---|
| 3013 | }
|
---|
| 3014 | else {
|
---|
| 3015 | /* Cannot identify server OS. Continue anyway and cross fingers. */
|
---|
| 3016 | }
|
---|
| 3017 |
|
---|
| 3018 | state(conn, FTP_STOP); /* we are done with the CONNECT phase! */
|
---|
| 3019 | DEBUGF(infof(data, "protocol connect phase DONE\n"));
|
---|
| 3020 | break;
|
---|
| 3021 |
|
---|
| 3022 | case FTP_NAMEFMT:
|
---|
| 3023 | if(ftpcode == 250) {
|
---|
| 3024 | /* Name format change successful: reload initial path. */
|
---|
| 3025 | ftp_state_pwd(conn);
|
---|
| 3026 | break;
|
---|
| 3027 | }
|
---|
| 3028 |
|
---|
| 3029 | state(conn, FTP_STOP); /* we are done with the CONNECT phase! */
|
---|
| 3030 | DEBUGF(infof(data, "protocol connect phase DONE\n"));
|
---|
| 3031 | break;
|
---|
| 3032 |
|
---|
| 3033 | case FTP_QUOTE:
|
---|
| 3034 | case FTP_POSTQUOTE:
|
---|
| 3035 | case FTP_RETR_PREQUOTE:
|
---|
| 3036 | case FTP_STOR_PREQUOTE:
|
---|
| 3037 | if((ftpcode >= 400) && !ftpc->count2) {
|
---|
| 3038 | /* failure response code, and not allowed to fail */
|
---|
| 3039 | failf(conn->data, "QUOT command failed with %03d", ftpcode);
|
---|
| 3040 | return CURLE_QUOTE_ERROR;
|
---|
| 3041 | }
|
---|
| 3042 | result = ftp_state_quote(conn, FALSE, ftpc->state);
|
---|
| 3043 | if(result)
|
---|
| 3044 | return result;
|
---|
| 3045 |
|
---|
| 3046 | break;
|
---|
| 3047 |
|
---|
| 3048 | case FTP_CWD:
|
---|
| 3049 | if(ftpcode/100 != 2) {
|
---|
| 3050 | /* failure to CWD there */
|
---|
| 3051 | if(conn->data->set.ftp_create_missing_dirs &&
|
---|
| 3052 | ftpc->count1 && !ftpc->count2) {
|
---|
| 3053 | /* try making it */
|
---|
| 3054 | ftpc->count2++; /* counter to prevent CWD-MKD loops */
|
---|
| 3055 | PPSENDF(&ftpc->pp, "MKD %s", ftpc->dirs[ftpc->count1 - 1]);
|
---|
| 3056 | state(conn, FTP_MKD);
|
---|
| 3057 | }
|
---|
| 3058 | else {
|
---|
| 3059 | /* return failure */
|
---|
| 3060 | failf(data, "Server denied you to change to the given directory");
|
---|
| 3061 | ftpc->cwdfail = TRUE; /* don't remember this path as we failed
|
---|
| 3062 | to enter it */
|
---|
| 3063 | return CURLE_REMOTE_ACCESS_DENIED;
|
---|
| 3064 | }
|
---|
| 3065 | }
|
---|
| 3066 | else {
|
---|
| 3067 | /* success */
|
---|
| 3068 | ftpc->count2=0;
|
---|
| 3069 | if(++ftpc->count1 <= ftpc->dirdepth) {
|
---|
| 3070 | /* send next CWD */
|
---|
| 3071 | PPSENDF(&ftpc->pp, "CWD %s", ftpc->dirs[ftpc->count1 - 1]);
|
---|
| 3072 | }
|
---|
| 3073 | else {
|
---|
| 3074 | result = ftp_state_mdtm(conn);
|
---|
| 3075 | if(result)
|
---|
| 3076 | return result;
|
---|
| 3077 | }
|
---|
| 3078 | }
|
---|
| 3079 | break;
|
---|
| 3080 |
|
---|
| 3081 | case FTP_MKD:
|
---|
| 3082 | if((ftpcode/100 != 2) && !ftpc->count3--) {
|
---|
| 3083 | /* failure to MKD the dir */
|
---|
| 3084 | failf(data, "Failed to MKD dir: %03d", ftpcode);
|
---|
| 3085 | return CURLE_REMOTE_ACCESS_DENIED;
|
---|
| 3086 | }
|
---|
| 3087 | state(conn, FTP_CWD);
|
---|
| 3088 | /* send CWD */
|
---|
| 3089 | PPSENDF(&ftpc->pp, "CWD %s", ftpc->dirs[ftpc->count1 - 1]);
|
---|
| 3090 | break;
|
---|
| 3091 |
|
---|
| 3092 | case FTP_MDTM:
|
---|
| 3093 | result = ftp_state_mdtm_resp(conn, ftpcode);
|
---|
| 3094 | break;
|
---|
| 3095 |
|
---|
| 3096 | case FTP_TYPE:
|
---|
| 3097 | case FTP_LIST_TYPE:
|
---|
| 3098 | case FTP_RETR_TYPE:
|
---|
| 3099 | case FTP_STOR_TYPE:
|
---|
| 3100 | result = ftp_state_type_resp(conn, ftpcode, ftpc->state);
|
---|
| 3101 | break;
|
---|
| 3102 |
|
---|
| 3103 | case FTP_SIZE:
|
---|
| 3104 | case FTP_RETR_SIZE:
|
---|
| 3105 | case FTP_STOR_SIZE:
|
---|
| 3106 | result = ftp_state_size_resp(conn, ftpcode, ftpc->state);
|
---|
| 3107 | break;
|
---|
| 3108 |
|
---|
| 3109 | case FTP_REST:
|
---|
| 3110 | case FTP_RETR_REST:
|
---|
| 3111 | result = ftp_state_rest_resp(conn, ftpcode, ftpc->state);
|
---|
| 3112 | break;
|
---|
| 3113 |
|
---|
| 3114 | case FTP_PRET:
|
---|
| 3115 | if(ftpcode != 200) {
|
---|
| 3116 | /* there only is this one standard OK return code. */
|
---|
| 3117 | failf(data, "PRET command not accepted: %03d", ftpcode);
|
---|
| 3118 | return CURLE_FTP_PRET_FAILED;
|
---|
| 3119 | }
|
---|
| 3120 | result = ftp_state_use_pasv(conn);
|
---|
| 3121 | break;
|
---|
| 3122 |
|
---|
| 3123 | case FTP_PASV:
|
---|
| 3124 | result = ftp_state_pasv_resp(conn, ftpcode);
|
---|
| 3125 | break;
|
---|
| 3126 |
|
---|
| 3127 | case FTP_PORT:
|
---|
| 3128 | result = ftp_state_port_resp(conn, ftpcode);
|
---|
| 3129 | break;
|
---|
| 3130 |
|
---|
| 3131 | case FTP_LIST:
|
---|
| 3132 | case FTP_RETR:
|
---|
| 3133 | result = ftp_state_get_resp(conn, ftpcode, ftpc->state);
|
---|
| 3134 | break;
|
---|
| 3135 |
|
---|
| 3136 | case FTP_STOR:
|
---|
| 3137 | result = ftp_state_stor_resp(conn, ftpcode, ftpc->state);
|
---|
| 3138 | break;
|
---|
| 3139 |
|
---|
| 3140 | case FTP_QUIT:
|
---|
| 3141 | /* fallthrough, just stop! */
|
---|
| 3142 | default:
|
---|
| 3143 | /* internal error */
|
---|
| 3144 | state(conn, FTP_STOP);
|
---|
| 3145 | break;
|
---|
| 3146 | }
|
---|
| 3147 | } /* if(ftpcode) */
|
---|
| 3148 |
|
---|
| 3149 | return result;
|
---|
| 3150 | }
|
---|
| 3151 |
|
---|
| 3152 |
|
---|
| 3153 | /* called repeatedly until done from multi.c */
|
---|
| 3154 | static CURLcode ftp_multi_statemach(struct connectdata *conn,
|
---|
| 3155 | bool *done)
|
---|
| 3156 | {
|
---|
| 3157 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3158 | CURLcode result = Curl_pp_statemach(&ftpc->pp, FALSE);
|
---|
| 3159 |
|
---|
| 3160 | /* Check for the state outside of the Curl_socket_ready() return code checks
|
---|
| 3161 | since at times we are in fact already in this state when this function
|
---|
| 3162 | gets called. */
|
---|
| 3163 | *done = (ftpc->state == FTP_STOP) ? TRUE : FALSE;
|
---|
| 3164 |
|
---|
| 3165 | return result;
|
---|
| 3166 | }
|
---|
| 3167 |
|
---|
| 3168 | static CURLcode ftp_block_statemach(struct connectdata *conn)
|
---|
| 3169 | {
|
---|
| 3170 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3171 | struct pingpong *pp = &ftpc->pp;
|
---|
| 3172 | CURLcode result = CURLE_OK;
|
---|
| 3173 |
|
---|
| 3174 | while(ftpc->state != FTP_STOP) {
|
---|
| 3175 | result = Curl_pp_statemach(pp, TRUE);
|
---|
| 3176 | if(result)
|
---|
| 3177 | break;
|
---|
| 3178 | }
|
---|
| 3179 |
|
---|
| 3180 | return result;
|
---|
| 3181 | }
|
---|
| 3182 |
|
---|
| 3183 | /*
|
---|
| 3184 | * ftp_connect() should do everything that is to be considered a part of
|
---|
| 3185 | * the connection phase.
|
---|
| 3186 | *
|
---|
| 3187 | * The variable 'done' points to will be TRUE if the protocol-layer connect
|
---|
| 3188 | * phase is done when this function returns, or FALSE if not.
|
---|
| 3189 | *
|
---|
| 3190 | */
|
---|
| 3191 | static CURLcode ftp_connect(struct connectdata *conn,
|
---|
| 3192 | bool *done) /* see description above */
|
---|
| 3193 | {
|
---|
| 3194 | CURLcode result;
|
---|
| 3195 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3196 | struct pingpong *pp = &ftpc->pp;
|
---|
| 3197 |
|
---|
| 3198 | *done = FALSE; /* default to not done yet */
|
---|
| 3199 |
|
---|
| 3200 | /* We always support persistent connections on ftp */
|
---|
| 3201 | connkeep(conn, "FTP default");
|
---|
| 3202 |
|
---|
| 3203 | pp->response_time = RESP_TIMEOUT; /* set default response time-out */
|
---|
| 3204 | pp->statemach_act = ftp_statemach_act;
|
---|
| 3205 | pp->endofresp = ftp_endofresp;
|
---|
| 3206 | pp->conn = conn;
|
---|
| 3207 |
|
---|
| 3208 | if(conn->handler->flags & PROTOPT_SSL) {
|
---|
| 3209 | /* BLOCKING */
|
---|
| 3210 | result = Curl_ssl_connect(conn, FIRSTSOCKET);
|
---|
| 3211 | if(result)
|
---|
| 3212 | return result;
|
---|
| 3213 | }
|
---|
| 3214 |
|
---|
| 3215 | Curl_pp_init(pp); /* init the generic pingpong data */
|
---|
| 3216 |
|
---|
| 3217 | /* When we connect, we start in the state where we await the 220
|
---|
| 3218 | response */
|
---|
| 3219 | state(conn, FTP_WAIT220);
|
---|
| 3220 |
|
---|
| 3221 | result = ftp_multi_statemach(conn, done);
|
---|
| 3222 |
|
---|
| 3223 | return result;
|
---|
| 3224 | }
|
---|
| 3225 |
|
---|
| 3226 | /***********************************************************************
|
---|
| 3227 | *
|
---|
| 3228 | * ftp_done()
|
---|
| 3229 | *
|
---|
| 3230 | * The DONE function. This does what needs to be done after a single DO has
|
---|
| 3231 | * performed.
|
---|
| 3232 | *
|
---|
| 3233 | * Input argument is already checked for validity.
|
---|
| 3234 | */
|
---|
| 3235 | static CURLcode ftp_done(struct connectdata *conn, CURLcode status,
|
---|
| 3236 | bool premature)
|
---|
| 3237 | {
|
---|
| 3238 | struct SessionHandle *data = conn->data;
|
---|
| 3239 | struct FTP *ftp = data->req.protop;
|
---|
| 3240 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3241 | struct pingpong *pp = &ftpc->pp;
|
---|
| 3242 | ssize_t nread;
|
---|
| 3243 | int ftpcode;
|
---|
| 3244 | CURLcode result = CURLE_OK;
|
---|
| 3245 | bool was_ctl_valid = ftpc->ctl_valid;
|
---|
| 3246 | char *path;
|
---|
| 3247 | const char *path_to_use = data->state.path;
|
---|
| 3248 |
|
---|
| 3249 | if(!ftp)
|
---|
| 3250 | /* When the easy handle is removed from the multi while libcurl is still
|
---|
| 3251 | * trying to resolve the host name, it seems that the ftp struct is not
|
---|
| 3252 | * yet initialized, but the removal action calls Curl_done() which calls
|
---|
| 3253 | * this function. So we simply return success if no ftp pointer is set.
|
---|
| 3254 | */
|
---|
| 3255 | return CURLE_OK;
|
---|
| 3256 |
|
---|
| 3257 | switch(status) {
|
---|
| 3258 | case CURLE_BAD_DOWNLOAD_RESUME:
|
---|
| 3259 | case CURLE_FTP_WEIRD_PASV_REPLY:
|
---|
| 3260 | case CURLE_FTP_PORT_FAILED:
|
---|
| 3261 | case CURLE_FTP_ACCEPT_FAILED:
|
---|
| 3262 | case CURLE_FTP_ACCEPT_TIMEOUT:
|
---|
| 3263 | case CURLE_FTP_COULDNT_SET_TYPE:
|
---|
| 3264 | case CURLE_FTP_COULDNT_RETR_FILE:
|
---|
| 3265 | case CURLE_PARTIAL_FILE:
|
---|
| 3266 | case CURLE_UPLOAD_FAILED:
|
---|
| 3267 | case CURLE_REMOTE_ACCESS_DENIED:
|
---|
| 3268 | case CURLE_FILESIZE_EXCEEDED:
|
---|
| 3269 | case CURLE_REMOTE_FILE_NOT_FOUND:
|
---|
| 3270 | case CURLE_WRITE_ERROR:
|
---|
| 3271 | /* the connection stays alive fine even though this happened */
|
---|
| 3272 | /* fall-through */
|
---|
| 3273 | case CURLE_OK: /* doesn't affect the control connection's status */
|
---|
| 3274 | if(!premature) {
|
---|
| 3275 | ftpc->ctl_valid = was_ctl_valid;
|
---|
| 3276 | break;
|
---|
| 3277 | }
|
---|
| 3278 | /* until we cope better with prematurely ended requests, let them
|
---|
| 3279 | * fallback as if in complete failure */
|
---|
| 3280 | default: /* by default, an error means the control connection is
|
---|
| 3281 | wedged and should not be used anymore */
|
---|
| 3282 | ftpc->ctl_valid = FALSE;
|
---|
| 3283 | ftpc->cwdfail = TRUE; /* set this TRUE to prevent us to remember the
|
---|
| 3284 | current path, as this connection is going */
|
---|
| 3285 | connclose(conn, "FTP ended with bad error code");
|
---|
| 3286 | result = status; /* use the already set error code */
|
---|
| 3287 | break;
|
---|
| 3288 | }
|
---|
| 3289 |
|
---|
| 3290 | /* now store a copy of the directory we are in */
|
---|
| 3291 | free(ftpc->prevpath);
|
---|
| 3292 |
|
---|
| 3293 | if(data->set.wildcardmatch) {
|
---|
| 3294 | if(data->set.chunk_end && ftpc->file) {
|
---|
| 3295 | data->set.chunk_end(data->wildcard.customptr);
|
---|
| 3296 | }
|
---|
| 3297 | ftpc->known_filesize = -1;
|
---|
| 3298 | }
|
---|
| 3299 |
|
---|
| 3300 | /* get the "raw" path */
|
---|
| 3301 | path = curl_easy_unescape(data, path_to_use, 0, NULL);
|
---|
| 3302 | if(!path) {
|
---|
| 3303 | /* out of memory, but we can limp along anyway (and should try to
|
---|
| 3304 | * since we may already be in the out of memory cleanup path) */
|
---|
| 3305 | if(!result)
|
---|
| 3306 | result = CURLE_OUT_OF_MEMORY;
|
---|
| 3307 | ftpc->ctl_valid = FALSE; /* mark control connection as bad */
|
---|
| 3308 | connclose(conn, "FTP: out of memory!"); /* mark for connection closure */
|
---|
| 3309 | ftpc->prevpath = NULL; /* no path remembering */
|
---|
| 3310 | }
|
---|
| 3311 | else {
|
---|
| 3312 | size_t flen = ftpc->file?strlen(ftpc->file):0; /* file is "raw" already */
|
---|
| 3313 | size_t dlen = strlen(path)-flen;
|
---|
| 3314 | if(!ftpc->cwdfail) {
|
---|
| 3315 | if(dlen && (data->set.ftp_filemethod != FTPFILE_NOCWD)) {
|
---|
| 3316 | ftpc->prevpath = path;
|
---|
| 3317 | if(flen)
|
---|
| 3318 | /* if 'path' is not the whole string */
|
---|
| 3319 | ftpc->prevpath[dlen]=0; /* terminate */
|
---|
| 3320 | }
|
---|
| 3321 | else {
|
---|
| 3322 | /* we never changed dir */
|
---|
| 3323 | ftpc->prevpath=strdup("");
|
---|
| 3324 | free(path);
|
---|
| 3325 | }
|
---|
| 3326 | if(ftpc->prevpath)
|
---|
| 3327 | infof(data, "Remembering we are in dir \"%s\"\n", ftpc->prevpath);
|
---|
| 3328 | }
|
---|
| 3329 | else {
|
---|
| 3330 | ftpc->prevpath = NULL; /* no path */
|
---|
| 3331 | free(path);
|
---|
| 3332 | }
|
---|
| 3333 | }
|
---|
| 3334 | /* free the dir tree and file parts */
|
---|
| 3335 | freedirs(ftpc);
|
---|
| 3336 |
|
---|
| 3337 | /* shut down the socket to inform the server we're done */
|
---|
| 3338 |
|
---|
| 3339 | #ifdef _WIN32_WCE
|
---|
| 3340 | shutdown(conn->sock[SECONDARYSOCKET], 2); /* SD_BOTH */
|
---|
| 3341 | #endif
|
---|
| 3342 |
|
---|
| 3343 | if(conn->sock[SECONDARYSOCKET] != CURL_SOCKET_BAD) {
|
---|
| 3344 | if(!result && ftpc->dont_check && data->req.maxdownload > 0) {
|
---|
| 3345 | /* partial download completed */
|
---|
| 3346 | result = Curl_pp_sendf(pp, "%s", "ABOR");
|
---|
| 3347 | if(result) {
|
---|
| 3348 | failf(data, "Failure sending ABOR command: %s",
|
---|
| 3349 | curl_easy_strerror(result));
|
---|
| 3350 | ftpc->ctl_valid = FALSE; /* mark control connection as bad */
|
---|
| 3351 | connclose(conn, "ABOR command failed"); /* connection closure */
|
---|
| 3352 | }
|
---|
| 3353 | }
|
---|
| 3354 |
|
---|
| 3355 | if(conn->ssl[SECONDARYSOCKET].use) {
|
---|
| 3356 | /* The secondary socket is using SSL so we must close down that part
|
---|
| 3357 | first before we close the socket for real */
|
---|
| 3358 | Curl_ssl_close(conn, SECONDARYSOCKET);
|
---|
| 3359 |
|
---|
| 3360 | /* Note that we keep "use" set to TRUE since that (next) connection is
|
---|
| 3361 | still requested to use SSL */
|
---|
| 3362 | }
|
---|
| 3363 | if(CURL_SOCKET_BAD != conn->sock[SECONDARYSOCKET]) {
|
---|
| 3364 | Curl_closesocket(conn, conn->sock[SECONDARYSOCKET]);
|
---|
| 3365 | conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
|
---|
| 3366 | conn->bits.tcpconnect[SECONDARYSOCKET] = FALSE;
|
---|
| 3367 | }
|
---|
| 3368 | }
|
---|
| 3369 |
|
---|
| 3370 | if(!result && (ftp->transfer == FTPTRANSFER_BODY) && ftpc->ctl_valid &&
|
---|
| 3371 | pp->pending_resp && !premature) {
|
---|
| 3372 | /*
|
---|
| 3373 | * Let's see what the server says about the transfer we just performed,
|
---|
| 3374 | * but lower the timeout as sometimes this connection has died while the
|
---|
| 3375 | * data has been transferred. This happens when doing through NATs etc that
|
---|
| 3376 | * abandon old silent connections.
|
---|
| 3377 | */
|
---|
| 3378 | long old_time = pp->response_time;
|
---|
| 3379 |
|
---|
| 3380 | pp->response_time = 60*1000; /* give it only a minute for now */
|
---|
| 3381 | pp->response = Curl_tvnow(); /* timeout relative now */
|
---|
| 3382 |
|
---|
| 3383 | result = Curl_GetFTPResponse(&nread, conn, &ftpcode);
|
---|
| 3384 |
|
---|
| 3385 | pp->response_time = old_time; /* set this back to previous value */
|
---|
| 3386 |
|
---|
| 3387 | if(!nread && (CURLE_OPERATION_TIMEDOUT == result)) {
|
---|
| 3388 | failf(data, "control connection looks dead");
|
---|
| 3389 | ftpc->ctl_valid = FALSE; /* mark control connection as bad */
|
---|
| 3390 | connclose(conn, "Timeout or similar in FTP DONE operation"); /* close */
|
---|
| 3391 | }
|
---|
| 3392 |
|
---|
| 3393 | if(result)
|
---|
| 3394 | return result;
|
---|
| 3395 |
|
---|
| 3396 | if(ftpc->dont_check && data->req.maxdownload > 0) {
|
---|
| 3397 | /* we have just sent ABOR and there is no reliable way to check if it was
|
---|
| 3398 | * successful or not; we have to close the connection now */
|
---|
| 3399 | infof(data, "partial download completed, closing connection\n");
|
---|
| 3400 | connclose(conn, "Partial download with no ability to check");
|
---|
| 3401 | return result;
|
---|
| 3402 | }
|
---|
| 3403 |
|
---|
| 3404 | if(!ftpc->dont_check) {
|
---|
| 3405 | /* 226 Transfer complete, 250 Requested file action okay, completed. */
|
---|
| 3406 | if((ftpcode != 226) && (ftpcode != 250)) {
|
---|
| 3407 | failf(data, "server did not report OK, got %d", ftpcode);
|
---|
| 3408 | result = CURLE_PARTIAL_FILE;
|
---|
| 3409 | }
|
---|
| 3410 | }
|
---|
| 3411 | }
|
---|
| 3412 |
|
---|
| 3413 | if(result || premature)
|
---|
| 3414 | /* the response code from the transfer showed an error already so no
|
---|
| 3415 | use checking further */
|
---|
| 3416 | ;
|
---|
| 3417 | else if(data->set.upload) {
|
---|
| 3418 | if((-1 != data->state.infilesize) &&
|
---|
| 3419 | (data->state.infilesize != *ftp->bytecountp) &&
|
---|
| 3420 | !data->set.crlf &&
|
---|
| 3421 | (ftp->transfer == FTPTRANSFER_BODY)) {
|
---|
| 3422 | failf(data, "Uploaded unaligned file size (%" CURL_FORMAT_CURL_OFF_T
|
---|
| 3423 | " out of %" CURL_FORMAT_CURL_OFF_T " bytes)",
|
---|
| 3424 | *ftp->bytecountp, data->state.infilesize);
|
---|
| 3425 | result = CURLE_PARTIAL_FILE;
|
---|
| 3426 | }
|
---|
| 3427 | }
|
---|
| 3428 | else {
|
---|
| 3429 | if((-1 != data->req.size) &&
|
---|
| 3430 | (data->req.size != *ftp->bytecountp) &&
|
---|
| 3431 | #ifdef CURL_DO_LINEEND_CONV
|
---|
| 3432 | /* Most FTP servers don't adjust their file SIZE response for CRLFs, so
|
---|
| 3433 | * we'll check to see if the discrepancy can be explained by the number
|
---|
| 3434 | * of CRLFs we've changed to LFs.
|
---|
| 3435 | */
|
---|
| 3436 | ((data->req.size + data->state.crlf_conversions) !=
|
---|
| 3437 | *ftp->bytecountp) &&
|
---|
| 3438 | #endif /* CURL_DO_LINEEND_CONV */
|
---|
| 3439 | (data->req.maxdownload != *ftp->bytecountp)) {
|
---|
| 3440 | failf(data, "Received only partial file: %" CURL_FORMAT_CURL_OFF_T
|
---|
| 3441 | " bytes", *ftp->bytecountp);
|
---|
| 3442 | result = CURLE_PARTIAL_FILE;
|
---|
| 3443 | }
|
---|
| 3444 | else if(!ftpc->dont_check &&
|
---|
| 3445 | !*ftp->bytecountp &&
|
---|
| 3446 | (data->req.size>0)) {
|
---|
| 3447 | failf(data, "No data was received!");
|
---|
| 3448 | result = CURLE_FTP_COULDNT_RETR_FILE;
|
---|
| 3449 | }
|
---|
| 3450 | }
|
---|
| 3451 |
|
---|
| 3452 | /* clear these for next connection */
|
---|
| 3453 | ftp->transfer = FTPTRANSFER_BODY;
|
---|
| 3454 | ftpc->dont_check = FALSE;
|
---|
| 3455 |
|
---|
| 3456 | /* Send any post-transfer QUOTE strings? */
|
---|
| 3457 | if(!status && !result && !premature && data->set.postquote)
|
---|
| 3458 | result = ftp_sendquote(conn, data->set.postquote);
|
---|
| 3459 |
|
---|
| 3460 | return result;
|
---|
| 3461 | }
|
---|
| 3462 |
|
---|
| 3463 | /***********************************************************************
|
---|
| 3464 | *
|
---|
| 3465 | * ftp_sendquote()
|
---|
| 3466 | *
|
---|
| 3467 | * Where a 'quote' means a list of custom commands to send to the server.
|
---|
| 3468 | * The quote list is passed as an argument.
|
---|
| 3469 | *
|
---|
| 3470 | * BLOCKING
|
---|
| 3471 | */
|
---|
| 3472 |
|
---|
| 3473 | static
|
---|
| 3474 | CURLcode ftp_sendquote(struct connectdata *conn, struct curl_slist *quote)
|
---|
| 3475 | {
|
---|
| 3476 | struct curl_slist *item;
|
---|
| 3477 | ssize_t nread;
|
---|
| 3478 | int ftpcode;
|
---|
| 3479 | CURLcode result;
|
---|
| 3480 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3481 | struct pingpong *pp = &ftpc->pp;
|
---|
| 3482 |
|
---|
| 3483 | item = quote;
|
---|
| 3484 | while(item) {
|
---|
| 3485 | if(item->data) {
|
---|
| 3486 | char *cmd = item->data;
|
---|
| 3487 | bool acceptfail = FALSE;
|
---|
| 3488 |
|
---|
| 3489 | /* if a command starts with an asterisk, which a legal FTP command never
|
---|
| 3490 | can, the command will be allowed to fail without it causing any
|
---|
| 3491 | aborts or cancels etc. It will cause libcurl to act as if the command
|
---|
| 3492 | is successful, whatever the server reponds. */
|
---|
| 3493 |
|
---|
| 3494 | if(cmd[0] == '*') {
|
---|
| 3495 | cmd++;
|
---|
| 3496 | acceptfail = TRUE;
|
---|
| 3497 | }
|
---|
| 3498 |
|
---|
| 3499 | PPSENDF(&conn->proto.ftpc.pp, "%s", cmd);
|
---|
| 3500 |
|
---|
| 3501 | pp->response = Curl_tvnow(); /* timeout relative now */
|
---|
| 3502 |
|
---|
| 3503 | result = Curl_GetFTPResponse(&nread, conn, &ftpcode);
|
---|
| 3504 | if(result)
|
---|
| 3505 | return result;
|
---|
| 3506 |
|
---|
| 3507 | if(!acceptfail && (ftpcode >= 400)) {
|
---|
| 3508 | failf(conn->data, "QUOT string not accepted: %s", cmd);
|
---|
| 3509 | return CURLE_QUOTE_ERROR;
|
---|
| 3510 | }
|
---|
| 3511 | }
|
---|
| 3512 |
|
---|
| 3513 | item = item->next;
|
---|
| 3514 | }
|
---|
| 3515 |
|
---|
| 3516 | return CURLE_OK;
|
---|
| 3517 | }
|
---|
| 3518 |
|
---|
| 3519 | /***********************************************************************
|
---|
| 3520 | *
|
---|
| 3521 | * ftp_need_type()
|
---|
| 3522 | *
|
---|
| 3523 | * Returns TRUE if we in the current situation should send TYPE
|
---|
| 3524 | */
|
---|
| 3525 | static int ftp_need_type(struct connectdata *conn,
|
---|
| 3526 | bool ascii_wanted)
|
---|
| 3527 | {
|
---|
| 3528 | return conn->proto.ftpc.transfertype != (ascii_wanted?'A':'I');
|
---|
| 3529 | }
|
---|
| 3530 |
|
---|
| 3531 | /***********************************************************************
|
---|
| 3532 | *
|
---|
| 3533 | * ftp_nb_type()
|
---|
| 3534 | *
|
---|
| 3535 | * Set TYPE. We only deal with ASCII or BINARY so this function
|
---|
| 3536 | * sets one of them.
|
---|
| 3537 | * If the transfer type is not sent, simulate on OK response in newstate
|
---|
| 3538 | */
|
---|
| 3539 | static CURLcode ftp_nb_type(struct connectdata *conn,
|
---|
| 3540 | bool ascii, ftpstate newstate)
|
---|
| 3541 | {
|
---|
| 3542 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3543 | CURLcode result;
|
---|
| 3544 | char want = (char)(ascii?'A':'I');
|
---|
| 3545 |
|
---|
| 3546 | if(ftpc->transfertype == want) {
|
---|
| 3547 | state(conn, newstate);
|
---|
| 3548 | return ftp_state_type_resp(conn, 200, newstate);
|
---|
| 3549 | }
|
---|
| 3550 |
|
---|
| 3551 | PPSENDF(&ftpc->pp, "TYPE %c", want);
|
---|
| 3552 | state(conn, newstate);
|
---|
| 3553 |
|
---|
| 3554 | /* keep track of our current transfer type */
|
---|
| 3555 | ftpc->transfertype = want;
|
---|
| 3556 | return CURLE_OK;
|
---|
| 3557 | }
|
---|
| 3558 |
|
---|
| 3559 | /***************************************************************************
|
---|
| 3560 | *
|
---|
| 3561 | * ftp_pasv_verbose()
|
---|
| 3562 | *
|
---|
| 3563 | * This function only outputs some informationals about this second connection
|
---|
| 3564 | * when we've issued a PASV command before and thus we have connected to a
|
---|
| 3565 | * possibly new IP address.
|
---|
| 3566 | *
|
---|
| 3567 | */
|
---|
| 3568 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
|
---|
| 3569 | static void
|
---|
| 3570 | ftp_pasv_verbose(struct connectdata *conn,
|
---|
| 3571 | Curl_addrinfo *ai,
|
---|
| 3572 | char *newhost, /* ascii version */
|
---|
| 3573 | int port)
|
---|
| 3574 | {
|
---|
| 3575 | char buf[256];
|
---|
| 3576 | Curl_printable_address(ai, buf, sizeof(buf));
|
---|
| 3577 | infof(conn->data, "Connecting to %s (%s) port %d\n", newhost, buf, port);
|
---|
| 3578 | }
|
---|
| 3579 | #endif
|
---|
| 3580 |
|
---|
| 3581 | /*
|
---|
| 3582 | Check if this is a range download, and if so, set the internal variables
|
---|
| 3583 | properly.
|
---|
| 3584 | */
|
---|
| 3585 |
|
---|
| 3586 | static CURLcode ftp_range(struct connectdata *conn)
|
---|
| 3587 | {
|
---|
| 3588 | curl_off_t from, to;
|
---|
| 3589 | char *ptr;
|
---|
| 3590 | char *ptr2;
|
---|
| 3591 | struct SessionHandle *data = conn->data;
|
---|
| 3592 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3593 |
|
---|
| 3594 | if(data->state.use_range && data->state.range) {
|
---|
| 3595 | from=curlx_strtoofft(data->state.range, &ptr, 0);
|
---|
| 3596 | while(*ptr && (ISSPACE(*ptr) || (*ptr=='-')))
|
---|
| 3597 | ptr++;
|
---|
| 3598 | to=curlx_strtoofft(ptr, &ptr2, 0);
|
---|
| 3599 | if(ptr == ptr2) {
|
---|
| 3600 | /* we didn't get any digit */
|
---|
| 3601 | to=-1;
|
---|
| 3602 | }
|
---|
| 3603 | if((-1 == to) && (from>=0)) {
|
---|
| 3604 | /* X - */
|
---|
| 3605 | data->state.resume_from = from;
|
---|
| 3606 | DEBUGF(infof(conn->data, "FTP RANGE %" CURL_FORMAT_CURL_OFF_T
|
---|
| 3607 | " to end of file\n", from));
|
---|
| 3608 | }
|
---|
| 3609 | else if(from < 0) {
|
---|
| 3610 | /* -Y */
|
---|
| 3611 | data->req.maxdownload = -from;
|
---|
| 3612 | data->state.resume_from = from;
|
---|
| 3613 | DEBUGF(infof(conn->data, "FTP RANGE the last %" CURL_FORMAT_CURL_OFF_T
|
---|
| 3614 | " bytes\n", -from));
|
---|
| 3615 | }
|
---|
| 3616 | else {
|
---|
| 3617 | /* X-Y */
|
---|
| 3618 | data->req.maxdownload = (to-from)+1; /* include last byte */
|
---|
| 3619 | data->state.resume_from = from;
|
---|
| 3620 | DEBUGF(infof(conn->data, "FTP RANGE from %" CURL_FORMAT_CURL_OFF_T
|
---|
| 3621 | " getting %" CURL_FORMAT_CURL_OFF_T " bytes\n",
|
---|
| 3622 | from, data->req.maxdownload));
|
---|
| 3623 | }
|
---|
| 3624 | DEBUGF(infof(conn->data, "range-download from %" CURL_FORMAT_CURL_OFF_T
|
---|
| 3625 | " to %" CURL_FORMAT_CURL_OFF_T ", totally %"
|
---|
| 3626 | CURL_FORMAT_CURL_OFF_T " bytes\n",
|
---|
| 3627 | from, to, data->req.maxdownload));
|
---|
| 3628 | ftpc->dont_check = TRUE; /* dont check for successful transfer */
|
---|
| 3629 | }
|
---|
| 3630 | else
|
---|
| 3631 | data->req.maxdownload = -1;
|
---|
| 3632 | return CURLE_OK;
|
---|
| 3633 | }
|
---|
| 3634 |
|
---|
| 3635 |
|
---|
| 3636 | /*
|
---|
| 3637 | * ftp_do_more()
|
---|
| 3638 | *
|
---|
| 3639 | * This function shall be called when the second FTP (data) connection is
|
---|
| 3640 | * connected.
|
---|
| 3641 | *
|
---|
| 3642 | * 'complete' can return 0 for incomplete, 1 for done and -1 for go back
|
---|
| 3643 | * (which basically is only for when PASV is being sent to retry a failed
|
---|
| 3644 | * EPSV).
|
---|
| 3645 | */
|
---|
| 3646 |
|
---|
| 3647 | static CURLcode ftp_do_more(struct connectdata *conn, int *completep)
|
---|
| 3648 | {
|
---|
| 3649 | struct SessionHandle *data=conn->data;
|
---|
| 3650 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3651 | CURLcode result = CURLE_OK;
|
---|
| 3652 | bool connected = FALSE;
|
---|
| 3653 | bool complete = FALSE;
|
---|
| 3654 |
|
---|
| 3655 | /* the ftp struct is inited in ftp_connect() */
|
---|
| 3656 | struct FTP *ftp = data->req.protop;
|
---|
| 3657 |
|
---|
| 3658 | /* if the second connection isn't done yet, wait for it */
|
---|
| 3659 | if(!conn->bits.tcpconnect[SECONDARYSOCKET]) {
|
---|
| 3660 | if(conn->tunnel_state[SECONDARYSOCKET] == TUNNEL_CONNECT) {
|
---|
| 3661 | /* As we're in TUNNEL_CONNECT state now, we know the proxy name and port
|
---|
| 3662 | aren't used so we blank their arguments. TODO: make this nicer */
|
---|
| 3663 | result = Curl_proxyCONNECT(conn, SECONDARYSOCKET, NULL, 0, FALSE);
|
---|
| 3664 |
|
---|
| 3665 | return result;
|
---|
| 3666 | }
|
---|
| 3667 |
|
---|
| 3668 | result = Curl_is_connected(conn, SECONDARYSOCKET, &connected);
|
---|
| 3669 |
|
---|
| 3670 | /* Ready to do more? */
|
---|
| 3671 | if(connected) {
|
---|
| 3672 | DEBUGF(infof(data, "DO-MORE connected phase starts\n"));
|
---|
| 3673 | if(conn->bits.proxy) {
|
---|
| 3674 | infof(data, "Connection to proxy confirmed\n");
|
---|
| 3675 | result = proxy_magic(conn, ftpc->newhost, ftpc->newport, &connected);
|
---|
| 3676 | }
|
---|
| 3677 | }
|
---|
| 3678 | else {
|
---|
| 3679 | if(result && (ftpc->count1 == 0)) {
|
---|
| 3680 | *completep = -1; /* go back to DOING please */
|
---|
| 3681 | /* this is a EPSV connect failing, try PASV instead */
|
---|
| 3682 | return ftp_epsv_disable(conn);
|
---|
| 3683 | }
|
---|
| 3684 | return result;
|
---|
| 3685 | }
|
---|
| 3686 | }
|
---|
| 3687 |
|
---|
| 3688 | if(ftpc->state) {
|
---|
| 3689 | /* already in a state so skip the intial commands.
|
---|
| 3690 | They are only done to kickstart the do_more state */
|
---|
| 3691 | result = ftp_multi_statemach(conn, &complete);
|
---|
| 3692 |
|
---|
| 3693 | *completep = (int)complete;
|
---|
| 3694 |
|
---|
| 3695 | /* if we got an error or if we don't wait for a data connection return
|
---|
| 3696 | immediately */
|
---|
| 3697 | if(result || (ftpc->wait_data_conn != TRUE))
|
---|
| 3698 | return result;
|
---|
| 3699 |
|
---|
| 3700 | if(ftpc->wait_data_conn)
|
---|
| 3701 | /* if we reach the end of the FTP state machine here, *complete will be
|
---|
| 3702 | TRUE but so is ftpc->wait_data_conn, which says we need to wait for
|
---|
| 3703 | the data connection and therefore we're not actually complete */
|
---|
| 3704 | *completep = 0;
|
---|
| 3705 | }
|
---|
| 3706 |
|
---|
| 3707 | if(ftp->transfer <= FTPTRANSFER_INFO) {
|
---|
| 3708 | /* a transfer is about to take place, or if not a file name was given
|
---|
| 3709 | so we'll do a SIZE on it later and then we need the right TYPE first */
|
---|
| 3710 |
|
---|
| 3711 | if(ftpc->wait_data_conn == TRUE) {
|
---|
| 3712 | bool serv_conned;
|
---|
| 3713 |
|
---|
| 3714 | result = ReceivedServerConnect(conn, &serv_conned);
|
---|
| 3715 | if(result)
|
---|
| 3716 | return result; /* Failed to accept data connection */
|
---|
| 3717 |
|
---|
| 3718 | if(serv_conned) {
|
---|
| 3719 | /* It looks data connection is established */
|
---|
| 3720 | result = AcceptServerConnect(conn);
|
---|
| 3721 | ftpc->wait_data_conn = FALSE;
|
---|
| 3722 | if(!result)
|
---|
| 3723 | result = InitiateTransfer(conn);
|
---|
| 3724 |
|
---|
| 3725 | if(result)
|
---|
| 3726 | return result;
|
---|
| 3727 |
|
---|
| 3728 | *completep = 1; /* this state is now complete when the server has
|
---|
| 3729 | connected back to us */
|
---|
| 3730 | }
|
---|
| 3731 | }
|
---|
| 3732 | else if(data->set.upload) {
|
---|
| 3733 | result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_STOR_TYPE);
|
---|
| 3734 | if(result)
|
---|
| 3735 | return result;
|
---|
| 3736 |
|
---|
| 3737 | result = ftp_multi_statemach(conn, &complete);
|
---|
| 3738 | if(ftpc->wait_data_conn)
|
---|
| 3739 | /* if we reach the end of the FTP state machine here, *complete will be
|
---|
| 3740 | TRUE but so is ftpc->wait_data_conn, which says we need to wait for
|
---|
| 3741 | the data connection and therefore we're not actually complete */
|
---|
| 3742 | *completep = 0;
|
---|
| 3743 | else
|
---|
| 3744 | *completep = (int)complete;
|
---|
| 3745 | }
|
---|
| 3746 | else {
|
---|
| 3747 | /* download */
|
---|
| 3748 | ftp->downloadsize = -1; /* unknown as of yet */
|
---|
| 3749 |
|
---|
| 3750 | result = ftp_range(conn);
|
---|
| 3751 | if(result)
|
---|
| 3752 | ;
|
---|
| 3753 | else if(data->set.ftp_list_only || !ftpc->file) {
|
---|
| 3754 | /* The specified path ends with a slash, and therefore we think this
|
---|
| 3755 | is a directory that is requested, use LIST. But before that we
|
---|
| 3756 | need to set ASCII transfer mode. */
|
---|
| 3757 |
|
---|
| 3758 | /* But only if a body transfer was requested. */
|
---|
| 3759 | if(ftp->transfer == FTPTRANSFER_BODY) {
|
---|
| 3760 | result = ftp_nb_type(conn, TRUE, FTP_LIST_TYPE);
|
---|
| 3761 | if(result)
|
---|
| 3762 | return result;
|
---|
| 3763 | }
|
---|
| 3764 | /* otherwise just fall through */
|
---|
| 3765 | }
|
---|
| 3766 | else {
|
---|
| 3767 | result = ftp_nb_type(conn, data->set.prefer_ascii, FTP_RETR_TYPE);
|
---|
| 3768 | if(result)
|
---|
| 3769 | return result;
|
---|
| 3770 | }
|
---|
| 3771 |
|
---|
| 3772 | result = ftp_multi_statemach(conn, &complete);
|
---|
| 3773 | *completep = (int)complete;
|
---|
| 3774 | }
|
---|
| 3775 | return result;
|
---|
| 3776 | }
|
---|
| 3777 |
|
---|
| 3778 | if(!result && (ftp->transfer != FTPTRANSFER_BODY))
|
---|
| 3779 | /* no data to transfer. FIX: it feels like a kludge to have this here
|
---|
| 3780 | too! */
|
---|
| 3781 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
| 3782 |
|
---|
| 3783 | if(!ftpc->wait_data_conn) {
|
---|
| 3784 | /* no waiting for the data connection so this is now complete */
|
---|
| 3785 | *completep = 1;
|
---|
| 3786 | DEBUGF(infof(data, "DO-MORE phase ends with %d\n", (int)result));
|
---|
| 3787 | }
|
---|
| 3788 |
|
---|
| 3789 | return result;
|
---|
| 3790 | }
|
---|
| 3791 |
|
---|
| 3792 |
|
---|
| 3793 |
|
---|
| 3794 | /***********************************************************************
|
---|
| 3795 | *
|
---|
| 3796 | * ftp_perform()
|
---|
| 3797 | *
|
---|
| 3798 | * This is the actual DO function for FTP. Get a file/directory according to
|
---|
| 3799 | * the options previously setup.
|
---|
| 3800 | */
|
---|
| 3801 |
|
---|
| 3802 | static
|
---|
| 3803 | CURLcode ftp_perform(struct connectdata *conn,
|
---|
| 3804 | bool *connected, /* connect status after PASV / PORT */
|
---|
| 3805 | bool *dophase_done)
|
---|
| 3806 | {
|
---|
| 3807 | /* this is FTP and no proxy */
|
---|
| 3808 | CURLcode result=CURLE_OK;
|
---|
| 3809 |
|
---|
| 3810 | DEBUGF(infof(conn->data, "DO phase starts\n"));
|
---|
| 3811 |
|
---|
| 3812 | if(conn->data->set.opt_no_body) {
|
---|
| 3813 | /* requested no body means no transfer... */
|
---|
| 3814 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 3815 | ftp->transfer = FTPTRANSFER_INFO;
|
---|
| 3816 | }
|
---|
| 3817 |
|
---|
| 3818 | *dophase_done = FALSE; /* not done yet */
|
---|
| 3819 |
|
---|
| 3820 | /* start the first command in the DO phase */
|
---|
| 3821 | result = ftp_state_quote(conn, TRUE, FTP_QUOTE);
|
---|
| 3822 | if(result)
|
---|
| 3823 | return result;
|
---|
| 3824 |
|
---|
| 3825 | /* run the state-machine */
|
---|
| 3826 | result = ftp_multi_statemach(conn, dophase_done);
|
---|
| 3827 |
|
---|
| 3828 | *connected = conn->bits.tcpconnect[SECONDARYSOCKET];
|
---|
| 3829 |
|
---|
| 3830 | infof(conn->data, "ftp_perform ends with SECONDARY: %d\n", *connected);
|
---|
| 3831 |
|
---|
| 3832 | if(*dophase_done)
|
---|
| 3833 | DEBUGF(infof(conn->data, "DO phase is complete1\n"));
|
---|
| 3834 |
|
---|
| 3835 | return result;
|
---|
| 3836 | }
|
---|
| 3837 |
|
---|
| 3838 | static void wc_data_dtor(void *ptr)
|
---|
| 3839 | {
|
---|
| 3840 | struct ftp_wc_tmpdata *tmp = ptr;
|
---|
| 3841 | if(tmp)
|
---|
| 3842 | Curl_ftp_parselist_data_free(&tmp->parser);
|
---|
| 3843 | free(tmp);
|
---|
| 3844 | }
|
---|
| 3845 |
|
---|
| 3846 | static CURLcode init_wc_data(struct connectdata *conn)
|
---|
| 3847 | {
|
---|
| 3848 | char *last_slash;
|
---|
| 3849 | char *path = conn->data->state.path;
|
---|
| 3850 | struct WildcardData *wildcard = &(conn->data->wildcard);
|
---|
| 3851 | CURLcode result = CURLE_OK;
|
---|
| 3852 | struct ftp_wc_tmpdata *ftp_tmp;
|
---|
| 3853 |
|
---|
| 3854 | last_slash = strrchr(conn->data->state.path, '/');
|
---|
| 3855 | if(last_slash) {
|
---|
| 3856 | last_slash++;
|
---|
| 3857 | if(last_slash[0] == '\0') {
|
---|
| 3858 | wildcard->state = CURLWC_CLEAN;
|
---|
| 3859 | result = ftp_parse_url_path(conn);
|
---|
| 3860 | return result;
|
---|
| 3861 | }
|
---|
| 3862 | else {
|
---|
| 3863 | wildcard->pattern = strdup(last_slash);
|
---|
| 3864 | if(!wildcard->pattern)
|
---|
| 3865 | return CURLE_OUT_OF_MEMORY;
|
---|
| 3866 | last_slash[0] = '\0'; /* cut file from path */
|
---|
| 3867 | }
|
---|
| 3868 | }
|
---|
| 3869 | else { /* there is only 'wildcard pattern' or nothing */
|
---|
| 3870 | if(path[0]) {
|
---|
| 3871 | wildcard->pattern = strdup(path);
|
---|
| 3872 | if(!wildcard->pattern)
|
---|
| 3873 | return CURLE_OUT_OF_MEMORY;
|
---|
| 3874 | path[0] = '\0';
|
---|
| 3875 | }
|
---|
| 3876 | else { /* only list */
|
---|
| 3877 | wildcard->state = CURLWC_CLEAN;
|
---|
| 3878 | result = ftp_parse_url_path(conn);
|
---|
| 3879 | return result;
|
---|
| 3880 | }
|
---|
| 3881 | }
|
---|
| 3882 |
|
---|
| 3883 | /* program continues only if URL is not ending with slash, allocate needed
|
---|
| 3884 | resources for wildcard transfer */
|
---|
| 3885 |
|
---|
| 3886 | /* allocate ftp protocol specific temporary wildcard data */
|
---|
| 3887 | ftp_tmp = calloc(1, sizeof(struct ftp_wc_tmpdata));
|
---|
| 3888 | if(!ftp_tmp) {
|
---|
| 3889 | Curl_safefree(wildcard->pattern);
|
---|
| 3890 | return CURLE_OUT_OF_MEMORY;
|
---|
| 3891 | }
|
---|
| 3892 |
|
---|
| 3893 | /* INITIALIZE parselist structure */
|
---|
| 3894 | ftp_tmp->parser = Curl_ftp_parselist_data_alloc();
|
---|
| 3895 | if(!ftp_tmp->parser) {
|
---|
| 3896 | Curl_safefree(wildcard->pattern);
|
---|
| 3897 | free(ftp_tmp);
|
---|
| 3898 | return CURLE_OUT_OF_MEMORY;
|
---|
| 3899 | }
|
---|
| 3900 |
|
---|
| 3901 | wildcard->tmp = ftp_tmp; /* put it to the WildcardData tmp pointer */
|
---|
| 3902 | wildcard->tmp_dtor = wc_data_dtor;
|
---|
| 3903 |
|
---|
| 3904 | /* wildcard does not support NOCWD option (assert it?) */
|
---|
| 3905 | if(conn->data->set.ftp_filemethod == FTPFILE_NOCWD)
|
---|
| 3906 | conn->data->set.ftp_filemethod = FTPFILE_MULTICWD;
|
---|
| 3907 |
|
---|
| 3908 | /* try to parse ftp url */
|
---|
| 3909 | result = ftp_parse_url_path(conn);
|
---|
| 3910 | if(result) {
|
---|
| 3911 | Curl_safefree(wildcard->pattern);
|
---|
| 3912 | wildcard->tmp_dtor(wildcard->tmp);
|
---|
| 3913 | wildcard->tmp_dtor = ZERO_NULL;
|
---|
| 3914 | wildcard->tmp = NULL;
|
---|
| 3915 | return result;
|
---|
| 3916 | }
|
---|
| 3917 |
|
---|
| 3918 | wildcard->path = strdup(conn->data->state.path);
|
---|
| 3919 | if(!wildcard->path) {
|
---|
| 3920 | Curl_safefree(wildcard->pattern);
|
---|
| 3921 | wildcard->tmp_dtor(wildcard->tmp);
|
---|
| 3922 | wildcard->tmp_dtor = ZERO_NULL;
|
---|
| 3923 | wildcard->tmp = NULL;
|
---|
| 3924 | return CURLE_OUT_OF_MEMORY;
|
---|
| 3925 | }
|
---|
| 3926 |
|
---|
| 3927 | /* backup old write_function */
|
---|
| 3928 | ftp_tmp->backup.write_function = conn->data->set.fwrite_func;
|
---|
| 3929 | /* parsing write function */
|
---|
| 3930 | conn->data->set.fwrite_func = Curl_ftp_parselist;
|
---|
| 3931 | /* backup old file descriptor */
|
---|
| 3932 | ftp_tmp->backup.file_descriptor = conn->data->set.out;
|
---|
| 3933 | /* let the writefunc callback know what curl pointer is working with */
|
---|
| 3934 | conn->data->set.out = conn;
|
---|
| 3935 |
|
---|
| 3936 | infof(conn->data, "Wildcard - Parsing started\n");
|
---|
| 3937 | return CURLE_OK;
|
---|
| 3938 | }
|
---|
| 3939 |
|
---|
| 3940 | /* This is called recursively */
|
---|
| 3941 | static CURLcode wc_statemach(struct connectdata *conn)
|
---|
| 3942 | {
|
---|
| 3943 | struct WildcardData * const wildcard = &(conn->data->wildcard);
|
---|
| 3944 | CURLcode result = CURLE_OK;
|
---|
| 3945 |
|
---|
| 3946 | switch (wildcard->state) {
|
---|
| 3947 | case CURLWC_INIT:
|
---|
| 3948 | result = init_wc_data(conn);
|
---|
| 3949 | if(wildcard->state == CURLWC_CLEAN)
|
---|
| 3950 | /* only listing! */
|
---|
| 3951 | break;
|
---|
| 3952 | else
|
---|
| 3953 | wildcard->state = result ? CURLWC_ERROR : CURLWC_MATCHING;
|
---|
| 3954 | break;
|
---|
| 3955 |
|
---|
| 3956 | case CURLWC_MATCHING: {
|
---|
| 3957 | /* In this state is LIST response successfully parsed, so lets restore
|
---|
| 3958 | previous WRITEFUNCTION callback and WRITEDATA pointer */
|
---|
| 3959 | struct ftp_wc_tmpdata *ftp_tmp = wildcard->tmp;
|
---|
| 3960 | conn->data->set.fwrite_func = ftp_tmp->backup.write_function;
|
---|
| 3961 | conn->data->set.out = ftp_tmp->backup.file_descriptor;
|
---|
| 3962 | ftp_tmp->backup.write_function = ZERO_NULL;
|
---|
| 3963 | ftp_tmp->backup.file_descriptor = NULL;
|
---|
| 3964 | wildcard->state = CURLWC_DOWNLOADING;
|
---|
| 3965 |
|
---|
| 3966 | if(Curl_ftp_parselist_geterror(ftp_tmp->parser)) {
|
---|
| 3967 | /* error found in LIST parsing */
|
---|
| 3968 | wildcard->state = CURLWC_CLEAN;
|
---|
| 3969 | return wc_statemach(conn);
|
---|
| 3970 | }
|
---|
| 3971 | else if(wildcard->filelist->size == 0) {
|
---|
| 3972 | /* no corresponding file */
|
---|
| 3973 | wildcard->state = CURLWC_CLEAN;
|
---|
| 3974 | return CURLE_REMOTE_FILE_NOT_FOUND;
|
---|
| 3975 | }
|
---|
| 3976 | return wc_statemach(conn);
|
---|
| 3977 | }
|
---|
| 3978 |
|
---|
| 3979 | case CURLWC_DOWNLOADING: {
|
---|
| 3980 | /* filelist has at least one file, lets get first one */
|
---|
| 3981 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 3982 | struct curl_fileinfo *finfo = wildcard->filelist->head->ptr;
|
---|
| 3983 |
|
---|
| 3984 | char *tmp_path = aprintf("%s%s", wildcard->path, finfo->filename);
|
---|
| 3985 | if(!tmp_path)
|
---|
| 3986 | return CURLE_OUT_OF_MEMORY;
|
---|
| 3987 |
|
---|
| 3988 | /* switch default "state.pathbuffer" and tmp_path, good to see
|
---|
| 3989 | ftp_parse_url_path function to understand this trick */
|
---|
| 3990 | Curl_safefree(conn->data->state.pathbuffer);
|
---|
| 3991 | conn->data->state.pathbuffer = tmp_path;
|
---|
| 3992 | conn->data->state.path = tmp_path;
|
---|
| 3993 |
|
---|
| 3994 | infof(conn->data, "Wildcard - START of \"%s\"\n", finfo->filename);
|
---|
| 3995 | if(conn->data->set.chunk_bgn) {
|
---|
| 3996 | long userresponse = conn->data->set.chunk_bgn(
|
---|
| 3997 | finfo, wildcard->customptr, (int)wildcard->filelist->size);
|
---|
| 3998 | switch(userresponse) {
|
---|
| 3999 | case CURL_CHUNK_BGN_FUNC_SKIP:
|
---|
| 4000 | infof(conn->data, "Wildcard - \"%s\" skipped by user\n",
|
---|
| 4001 | finfo->filename);
|
---|
| 4002 | wildcard->state = CURLWC_SKIP;
|
---|
| 4003 | return wc_statemach(conn);
|
---|
| 4004 | case CURL_CHUNK_BGN_FUNC_FAIL:
|
---|
| 4005 | return CURLE_CHUNK_FAILED;
|
---|
| 4006 | }
|
---|
| 4007 | }
|
---|
| 4008 |
|
---|
| 4009 | if(finfo->filetype != CURLFILETYPE_FILE) {
|
---|
| 4010 | wildcard->state = CURLWC_SKIP;
|
---|
| 4011 | return wc_statemach(conn);
|
---|
| 4012 | }
|
---|
| 4013 |
|
---|
| 4014 | if(finfo->flags & CURLFINFOFLAG_KNOWN_SIZE)
|
---|
| 4015 | ftpc->known_filesize = finfo->size;
|
---|
| 4016 |
|
---|
| 4017 | result = ftp_parse_url_path(conn);
|
---|
| 4018 | if(result)
|
---|
| 4019 | return result;
|
---|
| 4020 |
|
---|
| 4021 | /* we don't need the Curl_fileinfo of first file anymore */
|
---|
| 4022 | Curl_llist_remove(wildcard->filelist, wildcard->filelist->head, NULL);
|
---|
| 4023 |
|
---|
| 4024 | if(wildcard->filelist->size == 0) { /* remains only one file to down. */
|
---|
| 4025 | wildcard->state = CURLWC_CLEAN;
|
---|
| 4026 | /* after that will be ftp_do called once again and no transfer
|
---|
| 4027 | will be done because of CURLWC_CLEAN state */
|
---|
| 4028 | return CURLE_OK;
|
---|
| 4029 | }
|
---|
| 4030 | } break;
|
---|
| 4031 |
|
---|
| 4032 | case CURLWC_SKIP: {
|
---|
| 4033 | if(conn->data->set.chunk_end)
|
---|
| 4034 | conn->data->set.chunk_end(conn->data->wildcard.customptr);
|
---|
| 4035 | Curl_llist_remove(wildcard->filelist, wildcard->filelist->head, NULL);
|
---|
| 4036 | wildcard->state = (wildcard->filelist->size == 0) ?
|
---|
| 4037 | CURLWC_CLEAN : CURLWC_DOWNLOADING;
|
---|
| 4038 | return wc_statemach(conn);
|
---|
| 4039 | }
|
---|
| 4040 |
|
---|
| 4041 | case CURLWC_CLEAN: {
|
---|
| 4042 | struct ftp_wc_tmpdata *ftp_tmp = wildcard->tmp;
|
---|
| 4043 | result = CURLE_OK;
|
---|
| 4044 | if(ftp_tmp)
|
---|
| 4045 | result = Curl_ftp_parselist_geterror(ftp_tmp->parser);
|
---|
| 4046 |
|
---|
| 4047 | wildcard->state = result ? CURLWC_ERROR : CURLWC_DONE;
|
---|
| 4048 | } break;
|
---|
| 4049 |
|
---|
| 4050 | case CURLWC_DONE:
|
---|
| 4051 | case CURLWC_ERROR:
|
---|
| 4052 | break;
|
---|
| 4053 | }
|
---|
| 4054 |
|
---|
| 4055 | return result;
|
---|
| 4056 | }
|
---|
| 4057 |
|
---|
| 4058 | /***********************************************************************
|
---|
| 4059 | *
|
---|
| 4060 | * ftp_do()
|
---|
| 4061 | *
|
---|
| 4062 | * This function is registered as 'curl_do' function. It decodes the path
|
---|
| 4063 | * parts etc as a wrapper to the actual DO function (ftp_perform).
|
---|
| 4064 | *
|
---|
| 4065 | * The input argument is already checked for validity.
|
---|
| 4066 | */
|
---|
| 4067 | static CURLcode ftp_do(struct connectdata *conn, bool *done)
|
---|
| 4068 | {
|
---|
| 4069 | CURLcode result = CURLE_OK;
|
---|
| 4070 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 4071 |
|
---|
| 4072 | *done = FALSE; /* default to false */
|
---|
| 4073 | ftpc->wait_data_conn = FALSE; /* default to no such wait */
|
---|
| 4074 |
|
---|
| 4075 | if(conn->data->set.wildcardmatch) {
|
---|
| 4076 | result = wc_statemach(conn);
|
---|
| 4077 | if(conn->data->wildcard.state == CURLWC_SKIP ||
|
---|
| 4078 | conn->data->wildcard.state == CURLWC_DONE) {
|
---|
| 4079 | /* do not call ftp_regular_transfer */
|
---|
| 4080 | return CURLE_OK;
|
---|
| 4081 | }
|
---|
| 4082 | if(result) /* error, loop or skipping the file */
|
---|
| 4083 | return result;
|
---|
| 4084 | }
|
---|
| 4085 | else { /* no wildcard FSM needed */
|
---|
| 4086 | result = ftp_parse_url_path(conn);
|
---|
| 4087 | if(result)
|
---|
| 4088 | return result;
|
---|
| 4089 | }
|
---|
| 4090 |
|
---|
| 4091 | result = ftp_regular_transfer(conn, done);
|
---|
| 4092 |
|
---|
| 4093 | return result;
|
---|
| 4094 | }
|
---|
| 4095 |
|
---|
| 4096 |
|
---|
| 4097 | CURLcode Curl_ftpsendf(struct connectdata *conn,
|
---|
| 4098 | const char *fmt, ...)
|
---|
| 4099 | {
|
---|
| 4100 | ssize_t bytes_written;
|
---|
| 4101 | #define SBUF_SIZE 1024
|
---|
| 4102 | char s[SBUF_SIZE];
|
---|
| 4103 | size_t write_len;
|
---|
| 4104 | char *sptr=s;
|
---|
| 4105 | CURLcode result = CURLE_OK;
|
---|
| 4106 | #ifdef HAVE_GSSAPI
|
---|
| 4107 | enum protection_level data_sec = conn->data_prot;
|
---|
| 4108 | #endif
|
---|
| 4109 |
|
---|
| 4110 | va_list ap;
|
---|
| 4111 | va_start(ap, fmt);
|
---|
| 4112 | write_len = vsnprintf(s, SBUF_SIZE-3, fmt, ap);
|
---|
| 4113 | va_end(ap);
|
---|
| 4114 |
|
---|
| 4115 | strcpy(&s[write_len], "\r\n"); /* append a trailing CRLF */
|
---|
| 4116 | write_len +=2;
|
---|
| 4117 |
|
---|
| 4118 | bytes_written=0;
|
---|
| 4119 |
|
---|
| 4120 | result = Curl_convert_to_network(conn->data, s, write_len);
|
---|
| 4121 | /* Curl_convert_to_network calls failf if unsuccessful */
|
---|
| 4122 | if(result)
|
---|
| 4123 | return result;
|
---|
| 4124 |
|
---|
| 4125 | for(;;) {
|
---|
| 4126 | #ifdef HAVE_GSSAPI
|
---|
| 4127 | conn->data_prot = PROT_CMD;
|
---|
| 4128 | #endif
|
---|
| 4129 | result = Curl_write(conn, conn->sock[FIRSTSOCKET], sptr, write_len,
|
---|
| 4130 | &bytes_written);
|
---|
| 4131 | #ifdef HAVE_GSSAPI
|
---|
| 4132 | DEBUGASSERT(data_sec > PROT_NONE && data_sec < PROT_LAST);
|
---|
| 4133 | conn->data_prot = data_sec;
|
---|
| 4134 | #endif
|
---|
| 4135 |
|
---|
| 4136 | if(result)
|
---|
| 4137 | break;
|
---|
| 4138 |
|
---|
| 4139 | if(conn->data->set.verbose)
|
---|
| 4140 | Curl_debug(conn->data, CURLINFO_HEADER_OUT,
|
---|
| 4141 | sptr, (size_t)bytes_written, conn);
|
---|
| 4142 |
|
---|
| 4143 | if(bytes_written != (ssize_t)write_len) {
|
---|
| 4144 | write_len -= bytes_written;
|
---|
| 4145 | sptr += bytes_written;
|
---|
| 4146 | }
|
---|
| 4147 | else
|
---|
| 4148 | break;
|
---|
| 4149 | }
|
---|
| 4150 |
|
---|
| 4151 | return result;
|
---|
| 4152 | }
|
---|
| 4153 |
|
---|
| 4154 | /***********************************************************************
|
---|
| 4155 | *
|
---|
| 4156 | * ftp_quit()
|
---|
| 4157 | *
|
---|
| 4158 | * This should be called before calling sclose() on an ftp control connection
|
---|
| 4159 | * (not data connections). We should then wait for the response from the
|
---|
| 4160 | * server before returning. The calling code should then try to close the
|
---|
| 4161 | * connection.
|
---|
| 4162 | *
|
---|
| 4163 | */
|
---|
| 4164 | static CURLcode ftp_quit(struct connectdata *conn)
|
---|
| 4165 | {
|
---|
| 4166 | CURLcode result = CURLE_OK;
|
---|
| 4167 |
|
---|
| 4168 | if(conn->proto.ftpc.ctl_valid) {
|
---|
| 4169 | result = Curl_pp_sendf(&conn->proto.ftpc.pp, "%s", "QUIT");
|
---|
| 4170 | if(result) {
|
---|
| 4171 | failf(conn->data, "Failure sending QUIT command: %s",
|
---|
| 4172 | curl_easy_strerror(result));
|
---|
| 4173 | conn->proto.ftpc.ctl_valid = FALSE; /* mark control connection as bad */
|
---|
| 4174 | connclose(conn, "QUIT command failed"); /* mark for connection closure */
|
---|
| 4175 | state(conn, FTP_STOP);
|
---|
| 4176 | return result;
|
---|
| 4177 | }
|
---|
| 4178 |
|
---|
| 4179 | state(conn, FTP_QUIT);
|
---|
| 4180 |
|
---|
| 4181 | result = ftp_block_statemach(conn);
|
---|
| 4182 | }
|
---|
| 4183 |
|
---|
| 4184 | return result;
|
---|
| 4185 | }
|
---|
| 4186 |
|
---|
| 4187 | /***********************************************************************
|
---|
| 4188 | *
|
---|
| 4189 | * ftp_disconnect()
|
---|
| 4190 | *
|
---|
| 4191 | * Disconnect from an FTP server. Cleanup protocol-specific per-connection
|
---|
| 4192 | * resources. BLOCKING.
|
---|
| 4193 | */
|
---|
| 4194 | static CURLcode ftp_disconnect(struct connectdata *conn, bool dead_connection)
|
---|
| 4195 | {
|
---|
| 4196 | struct ftp_conn *ftpc= &conn->proto.ftpc;
|
---|
| 4197 | struct pingpong *pp = &ftpc->pp;
|
---|
| 4198 |
|
---|
| 4199 | /* We cannot send quit unconditionally. If this connection is stale or
|
---|
| 4200 | bad in any way, sending quit and waiting around here will make the
|
---|
| 4201 | disconnect wait in vain and cause more problems than we need to.
|
---|
| 4202 |
|
---|
| 4203 | ftp_quit() will check the state of ftp->ctl_valid. If it's ok it
|
---|
| 4204 | will try to send the QUIT command, otherwise it will just return.
|
---|
| 4205 | */
|
---|
| 4206 | if(dead_connection)
|
---|
| 4207 | ftpc->ctl_valid = FALSE;
|
---|
| 4208 |
|
---|
| 4209 | /* The FTP session may or may not have been allocated/setup at this point! */
|
---|
| 4210 | (void)ftp_quit(conn); /* ignore errors on the QUIT */
|
---|
| 4211 |
|
---|
| 4212 | if(ftpc->entrypath) {
|
---|
| 4213 | struct SessionHandle *data = conn->data;
|
---|
| 4214 | if(data->state.most_recent_ftp_entrypath == ftpc->entrypath) {
|
---|
| 4215 | data->state.most_recent_ftp_entrypath = NULL;
|
---|
| 4216 | }
|
---|
| 4217 | free(ftpc->entrypath);
|
---|
| 4218 | ftpc->entrypath = NULL;
|
---|
| 4219 | }
|
---|
| 4220 |
|
---|
| 4221 | freedirs(ftpc);
|
---|
| 4222 | free(ftpc->prevpath);
|
---|
| 4223 | ftpc->prevpath = NULL;
|
---|
| 4224 | free(ftpc->server_os);
|
---|
| 4225 | ftpc->server_os = NULL;
|
---|
| 4226 |
|
---|
| 4227 | Curl_pp_disconnect(pp);
|
---|
| 4228 |
|
---|
| 4229 | #ifdef HAVE_GSSAPI
|
---|
| 4230 | Curl_sec_end(conn);
|
---|
| 4231 | #endif
|
---|
| 4232 |
|
---|
| 4233 | return CURLE_OK;
|
---|
| 4234 | }
|
---|
| 4235 |
|
---|
| 4236 | /***********************************************************************
|
---|
| 4237 | *
|
---|
| 4238 | * ftp_parse_url_path()
|
---|
| 4239 | *
|
---|
| 4240 | * Parse the URL path into separate path components.
|
---|
| 4241 | *
|
---|
| 4242 | */
|
---|
| 4243 | static
|
---|
| 4244 | CURLcode ftp_parse_url_path(struct connectdata *conn)
|
---|
| 4245 | {
|
---|
| 4246 | struct SessionHandle *data = conn->data;
|
---|
| 4247 | /* the ftp struct is already inited in ftp_connect() */
|
---|
| 4248 | struct FTP *ftp = data->req.protop;
|
---|
| 4249 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 4250 | const char *slash_pos; /* position of the first '/' char in curpos */
|
---|
| 4251 | const char *path_to_use = data->state.path;
|
---|
| 4252 | const char *cur_pos;
|
---|
| 4253 | const char *filename = NULL;
|
---|
| 4254 |
|
---|
| 4255 | cur_pos = path_to_use; /* current position in path. point at the begin
|
---|
| 4256 | of next path component */
|
---|
| 4257 |
|
---|
| 4258 | ftpc->ctl_valid = FALSE;
|
---|
| 4259 | ftpc->cwdfail = FALSE;
|
---|
| 4260 |
|
---|
| 4261 | switch(data->set.ftp_filemethod) {
|
---|
| 4262 | case FTPFILE_NOCWD:
|
---|
| 4263 | /* fastest, but less standard-compliant */
|
---|
| 4264 |
|
---|
| 4265 | /*
|
---|
| 4266 | The best time to check whether the path is a file or directory is right
|
---|
| 4267 | here. so:
|
---|
| 4268 |
|
---|
| 4269 | the first condition in the if() right here, is there just in case
|
---|
| 4270 | someone decides to set path to NULL one day
|
---|
| 4271 | */
|
---|
| 4272 | if(data->state.path &&
|
---|
| 4273 | data->state.path[0] &&
|
---|
| 4274 | (data->state.path[strlen(data->state.path) - 1] != '/') )
|
---|
| 4275 | filename = data->state.path; /* this is a full file path */
|
---|
| 4276 | /*
|
---|
| 4277 | ftpc->file is not used anywhere other than for operations on a file.
|
---|
| 4278 | In other words, never for directory operations.
|
---|
| 4279 | So we can safely leave filename as NULL here and use it as a
|
---|
| 4280 | argument in dir/file decisions.
|
---|
| 4281 | */
|
---|
| 4282 | break;
|
---|
| 4283 |
|
---|
| 4284 | case FTPFILE_SINGLECWD:
|
---|
| 4285 | /* get the last slash */
|
---|
| 4286 | if(!path_to_use[0]) {
|
---|
| 4287 | /* no dir, no file */
|
---|
| 4288 | ftpc->dirdepth = 0;
|
---|
| 4289 | break;
|
---|
| 4290 | }
|
---|
| 4291 | slash_pos=strrchr(cur_pos, '/');
|
---|
| 4292 | if(slash_pos || !*cur_pos) {
|
---|
| 4293 | size_t dirlen = slash_pos-cur_pos;
|
---|
| 4294 |
|
---|
| 4295 | ftpc->dirs = calloc(1, sizeof(ftpc->dirs[0]));
|
---|
| 4296 | if(!ftpc->dirs)
|
---|
| 4297 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4298 |
|
---|
| 4299 | if(!dirlen)
|
---|
| 4300 | dirlen++;
|
---|
| 4301 |
|
---|
| 4302 | ftpc->dirs[0] = curl_easy_unescape(conn->data, slash_pos ? cur_pos : "/",
|
---|
| 4303 | slash_pos ? curlx_uztosi(dirlen) : 1,
|
---|
| 4304 | NULL);
|
---|
| 4305 | if(!ftpc->dirs[0]) {
|
---|
| 4306 | freedirs(ftpc);
|
---|
| 4307 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4308 | }
|
---|
| 4309 | ftpc->dirdepth = 1; /* we consider it to be a single dir */
|
---|
| 4310 | filename = slash_pos ? slash_pos+1 : cur_pos; /* rest is file name */
|
---|
| 4311 | }
|
---|
| 4312 | else
|
---|
| 4313 | filename = cur_pos; /* this is a file name only */
|
---|
| 4314 | break;
|
---|
| 4315 |
|
---|
| 4316 | default: /* allow pretty much anything */
|
---|
| 4317 | case FTPFILE_MULTICWD:
|
---|
| 4318 | ftpc->dirdepth = 0;
|
---|
| 4319 | ftpc->diralloc = 5; /* default dir depth to allocate */
|
---|
| 4320 | ftpc->dirs = calloc(ftpc->diralloc, sizeof(ftpc->dirs[0]));
|
---|
| 4321 | if(!ftpc->dirs)
|
---|
| 4322 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4323 |
|
---|
| 4324 | /* we have a special case for listing the root dir only */
|
---|
| 4325 | if(strequal(path_to_use, "/")) {
|
---|
| 4326 | cur_pos++; /* make it point to the zero byte */
|
---|
| 4327 | ftpc->dirs[0] = strdup("/");
|
---|
| 4328 | ftpc->dirdepth++;
|
---|
| 4329 | }
|
---|
| 4330 | else {
|
---|
| 4331 | /* parse the URL path into separate path components */
|
---|
| 4332 | while((slash_pos = strchr(cur_pos, '/')) != NULL) {
|
---|
| 4333 | /* 1 or 0 pointer offset to indicate absolute directory */
|
---|
| 4334 | ssize_t absolute_dir = ((cur_pos - data->state.path > 0) &&
|
---|
| 4335 | (ftpc->dirdepth == 0))?1:0;
|
---|
| 4336 |
|
---|
| 4337 | /* seek out the next path component */
|
---|
| 4338 | if(slash_pos-cur_pos) {
|
---|
| 4339 | /* we skip empty path components, like "x//y" since the FTP command
|
---|
| 4340 | CWD requires a parameter and a non-existent parameter a) doesn't
|
---|
| 4341 | work on many servers and b) has no effect on the others. */
|
---|
| 4342 | int len = curlx_sztosi(slash_pos - cur_pos + absolute_dir);
|
---|
| 4343 | ftpc->dirs[ftpc->dirdepth] =
|
---|
| 4344 | curl_easy_unescape(conn->data, cur_pos - absolute_dir, len, NULL);
|
---|
| 4345 | if(!ftpc->dirs[ftpc->dirdepth]) { /* run out of memory ... */
|
---|
| 4346 | failf(data, "no memory");
|
---|
| 4347 | freedirs(ftpc);
|
---|
| 4348 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4349 | }
|
---|
| 4350 | if(isBadFtpString(ftpc->dirs[ftpc->dirdepth])) {
|
---|
| 4351 | free(ftpc->dirs[ftpc->dirdepth]);
|
---|
| 4352 | freedirs(ftpc);
|
---|
| 4353 | return CURLE_URL_MALFORMAT;
|
---|
| 4354 | }
|
---|
| 4355 | }
|
---|
| 4356 | else {
|
---|
| 4357 | cur_pos = slash_pos + 1; /* jump to the rest of the string */
|
---|
| 4358 | if(!ftpc->dirdepth) {
|
---|
| 4359 | /* path starts with a slash, add that as a directory */
|
---|
| 4360 | ftpc->dirs[ftpc->dirdepth] = strdup("/");
|
---|
| 4361 | if(!ftpc->dirs[ftpc->dirdepth++]) { /* run out of memory ... */
|
---|
| 4362 | failf(data, "no memory");
|
---|
| 4363 | freedirs(ftpc);
|
---|
| 4364 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4365 | }
|
---|
| 4366 | }
|
---|
| 4367 | continue;
|
---|
| 4368 | }
|
---|
| 4369 |
|
---|
| 4370 | cur_pos = slash_pos + 1; /* jump to the rest of the string */
|
---|
| 4371 | if(++ftpc->dirdepth >= ftpc->diralloc) {
|
---|
| 4372 | /* enlarge array */
|
---|
| 4373 | char **bigger;
|
---|
| 4374 | ftpc->diralloc *= 2; /* double the size each time */
|
---|
| 4375 | bigger = realloc(ftpc->dirs, ftpc->diralloc * sizeof(ftpc->dirs[0]));
|
---|
| 4376 | if(!bigger) {
|
---|
| 4377 | freedirs(ftpc);
|
---|
| 4378 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4379 | }
|
---|
| 4380 | ftpc->dirs = bigger;
|
---|
| 4381 | }
|
---|
| 4382 | }
|
---|
| 4383 | }
|
---|
| 4384 | filename = cur_pos; /* the rest is the file name */
|
---|
| 4385 | break;
|
---|
| 4386 | } /* switch */
|
---|
| 4387 |
|
---|
| 4388 | if(filename && *filename) {
|
---|
| 4389 | ftpc->file = curl_easy_unescape(conn->data, filename, 0, NULL);
|
---|
| 4390 | if(NULL == ftpc->file) {
|
---|
| 4391 | freedirs(ftpc);
|
---|
| 4392 | failf(data, "no memory");
|
---|
| 4393 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4394 | }
|
---|
| 4395 | if(isBadFtpString(ftpc->file)) {
|
---|
| 4396 | freedirs(ftpc);
|
---|
| 4397 | return CURLE_URL_MALFORMAT;
|
---|
| 4398 | }
|
---|
| 4399 | }
|
---|
| 4400 | else
|
---|
| 4401 | ftpc->file=NULL; /* instead of point to a zero byte, we make it a NULL
|
---|
| 4402 | pointer */
|
---|
| 4403 |
|
---|
| 4404 | if(data->set.upload && !ftpc->file && (ftp->transfer == FTPTRANSFER_BODY)) {
|
---|
| 4405 | /* We need a file name when uploading. Return error! */
|
---|
| 4406 | failf(data, "Uploading to a URL without a file name!");
|
---|
| 4407 | return CURLE_URL_MALFORMAT;
|
---|
| 4408 | }
|
---|
| 4409 |
|
---|
| 4410 | ftpc->cwddone = FALSE; /* default to not done */
|
---|
| 4411 |
|
---|
| 4412 | if(ftpc->prevpath) {
|
---|
| 4413 | /* prevpath is "raw" so we convert the input path before we compare the
|
---|
| 4414 | strings */
|
---|
| 4415 | int dlen;
|
---|
| 4416 | char *path = curl_easy_unescape(conn->data, data->state.path, 0, &dlen);
|
---|
| 4417 | if(!path) {
|
---|
| 4418 | freedirs(ftpc);
|
---|
| 4419 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4420 | }
|
---|
| 4421 |
|
---|
| 4422 | dlen -= ftpc->file?curlx_uztosi(strlen(ftpc->file)):0;
|
---|
| 4423 | if((dlen == curlx_uztosi(strlen(ftpc->prevpath))) &&
|
---|
| 4424 | strnequal(path, ftpc->prevpath, dlen)) {
|
---|
| 4425 | infof(data, "Request has same path as previous transfer\n");
|
---|
| 4426 | ftpc->cwddone = TRUE;
|
---|
| 4427 | }
|
---|
| 4428 | free(path);
|
---|
| 4429 | }
|
---|
| 4430 |
|
---|
| 4431 | return CURLE_OK;
|
---|
| 4432 | }
|
---|
| 4433 |
|
---|
| 4434 | /* call this when the DO phase has completed */
|
---|
| 4435 | static CURLcode ftp_dophase_done(struct connectdata *conn,
|
---|
| 4436 | bool connected)
|
---|
| 4437 | {
|
---|
| 4438 | struct FTP *ftp = conn->data->req.protop;
|
---|
| 4439 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 4440 |
|
---|
| 4441 | if(connected) {
|
---|
| 4442 | int completed;
|
---|
| 4443 | CURLcode result = ftp_do_more(conn, &completed);
|
---|
| 4444 |
|
---|
| 4445 | if(result) {
|
---|
| 4446 | if(conn->sock[SECONDARYSOCKET] != CURL_SOCKET_BAD) {
|
---|
| 4447 | /* close the second socket if it was created already */
|
---|
| 4448 | Curl_closesocket(conn, conn->sock[SECONDARYSOCKET]);
|
---|
| 4449 | conn->sock[SECONDARYSOCKET] = CURL_SOCKET_BAD;
|
---|
| 4450 | }
|
---|
| 4451 | return result;
|
---|
| 4452 | }
|
---|
| 4453 | }
|
---|
| 4454 |
|
---|
| 4455 | if(ftp->transfer != FTPTRANSFER_BODY)
|
---|
| 4456 | /* no data to transfer */
|
---|
| 4457 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
| 4458 | else if(!connected)
|
---|
| 4459 | /* since we didn't connect now, we want do_more to get called */
|
---|
| 4460 | conn->bits.do_more = TRUE;
|
---|
| 4461 |
|
---|
| 4462 | ftpc->ctl_valid = TRUE; /* seems good */
|
---|
| 4463 |
|
---|
| 4464 | return CURLE_OK;
|
---|
| 4465 | }
|
---|
| 4466 |
|
---|
| 4467 | /* called from multi.c while DOing */
|
---|
| 4468 | static CURLcode ftp_doing(struct connectdata *conn,
|
---|
| 4469 | bool *dophase_done)
|
---|
| 4470 | {
|
---|
| 4471 | CURLcode result = ftp_multi_statemach(conn, dophase_done);
|
---|
| 4472 |
|
---|
| 4473 | if(result)
|
---|
| 4474 | DEBUGF(infof(conn->data, "DO phase failed\n"));
|
---|
| 4475 | else if(*dophase_done) {
|
---|
| 4476 | result = ftp_dophase_done(conn, FALSE /* not connected */);
|
---|
| 4477 |
|
---|
| 4478 | DEBUGF(infof(conn->data, "DO phase is complete2\n"));
|
---|
| 4479 | }
|
---|
| 4480 | return result;
|
---|
| 4481 | }
|
---|
| 4482 |
|
---|
| 4483 | /***********************************************************************
|
---|
| 4484 | *
|
---|
| 4485 | * ftp_regular_transfer()
|
---|
| 4486 | *
|
---|
| 4487 | * The input argument is already checked for validity.
|
---|
| 4488 | *
|
---|
| 4489 | * Performs all commands done before a regular transfer between a local and a
|
---|
| 4490 | * remote host.
|
---|
| 4491 | *
|
---|
| 4492 | * ftp->ctl_valid starts out as FALSE, and gets set to TRUE if we reach the
|
---|
| 4493 | * ftp_done() function without finding any major problem.
|
---|
| 4494 | */
|
---|
| 4495 | static
|
---|
| 4496 | CURLcode ftp_regular_transfer(struct connectdata *conn,
|
---|
| 4497 | bool *dophase_done)
|
---|
| 4498 | {
|
---|
| 4499 | CURLcode result=CURLE_OK;
|
---|
| 4500 | bool connected=FALSE;
|
---|
| 4501 | struct SessionHandle *data = conn->data;
|
---|
| 4502 | struct ftp_conn *ftpc = &conn->proto.ftpc;
|
---|
| 4503 | data->req.size = -1; /* make sure this is unknown at this point */
|
---|
| 4504 |
|
---|
| 4505 | Curl_pgrsSetUploadCounter(data, 0);
|
---|
| 4506 | Curl_pgrsSetDownloadCounter(data, 0);
|
---|
| 4507 | Curl_pgrsSetUploadSize(data, -1);
|
---|
| 4508 | Curl_pgrsSetDownloadSize(data, -1);
|
---|
| 4509 |
|
---|
| 4510 | ftpc->ctl_valid = TRUE; /* starts good */
|
---|
| 4511 |
|
---|
| 4512 | result = ftp_perform(conn,
|
---|
| 4513 | &connected, /* have we connected after PASV/PORT */
|
---|
| 4514 | dophase_done); /* all commands in the DO-phase done? */
|
---|
| 4515 |
|
---|
| 4516 | if(!result) {
|
---|
| 4517 |
|
---|
| 4518 | if(!*dophase_done)
|
---|
| 4519 | /* the DO phase has not completed yet */
|
---|
| 4520 | return CURLE_OK;
|
---|
| 4521 |
|
---|
| 4522 | result = ftp_dophase_done(conn, connected);
|
---|
| 4523 |
|
---|
| 4524 | if(result)
|
---|
| 4525 | return result;
|
---|
| 4526 | }
|
---|
| 4527 | else
|
---|
| 4528 | freedirs(ftpc);
|
---|
| 4529 |
|
---|
| 4530 | return result;
|
---|
| 4531 | }
|
---|
| 4532 |
|
---|
| 4533 | static CURLcode ftp_setup_connection(struct connectdata *conn)
|
---|
| 4534 | {
|
---|
| 4535 | struct SessionHandle *data = conn->data;
|
---|
| 4536 | char *type;
|
---|
| 4537 | char command;
|
---|
| 4538 | struct FTP *ftp;
|
---|
| 4539 |
|
---|
| 4540 | if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
|
---|
| 4541 | /* Unless we have asked to tunnel ftp operations through the proxy, we
|
---|
| 4542 | switch and use HTTP operations only */
|
---|
| 4543 | #ifndef CURL_DISABLE_HTTP
|
---|
| 4544 | if(conn->handler == &Curl_handler_ftp)
|
---|
| 4545 | conn->handler = &Curl_handler_ftp_proxy;
|
---|
| 4546 | else {
|
---|
| 4547 | #ifdef USE_SSL
|
---|
| 4548 | conn->handler = &Curl_handler_ftps_proxy;
|
---|
| 4549 | #else
|
---|
| 4550 | failf(data, "FTPS not supported!");
|
---|
| 4551 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
| 4552 | #endif
|
---|
| 4553 | }
|
---|
| 4554 | /* set it up as a HTTP connection instead */
|
---|
| 4555 | return conn->handler->setup_connection(conn);
|
---|
| 4556 | #else
|
---|
| 4557 | failf(data, "FTP over http proxy requires HTTP support built-in!");
|
---|
| 4558 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
| 4559 | #endif
|
---|
| 4560 | }
|
---|
| 4561 |
|
---|
| 4562 | conn->data->req.protop = ftp = malloc(sizeof(struct FTP));
|
---|
| 4563 | if(NULL == ftp)
|
---|
| 4564 | return CURLE_OUT_OF_MEMORY;
|
---|
| 4565 |
|
---|
| 4566 | data->state.path++; /* don't include the initial slash */
|
---|
| 4567 | data->state.slash_removed = TRUE; /* we've skipped the slash */
|
---|
| 4568 |
|
---|
| 4569 | /* FTP URLs support an extension like ";type=<typecode>" that
|
---|
| 4570 | * we'll try to get now! */
|
---|
| 4571 | type = strstr(data->state.path, ";type=");
|
---|
| 4572 |
|
---|
| 4573 | if(!type)
|
---|
| 4574 | type = strstr(conn->host.rawalloc, ";type=");
|
---|
| 4575 |
|
---|
| 4576 | if(type) {
|
---|
| 4577 | *type = 0; /* it was in the middle of the hostname */
|
---|
| 4578 | command = Curl_raw_toupper(type[6]);
|
---|
| 4579 | conn->bits.type_set = TRUE;
|
---|
| 4580 |
|
---|
| 4581 | switch (command) {
|
---|
| 4582 | case 'A': /* ASCII mode */
|
---|
| 4583 | data->set.prefer_ascii = TRUE;
|
---|
| 4584 | break;
|
---|
| 4585 |
|
---|
| 4586 | case 'D': /* directory mode */
|
---|
| 4587 | data->set.ftp_list_only = TRUE;
|
---|
| 4588 | break;
|
---|
| 4589 |
|
---|
| 4590 | case 'I': /* binary mode */
|
---|
| 4591 | default:
|
---|
| 4592 | /* switch off ASCII */
|
---|
| 4593 | data->set.prefer_ascii = FALSE;
|
---|
| 4594 | break;
|
---|
| 4595 | }
|
---|
| 4596 | }
|
---|
| 4597 |
|
---|
| 4598 | /* get some initial data into the ftp struct */
|
---|
| 4599 | ftp->bytecountp = &conn->data->req.bytecount;
|
---|
| 4600 | ftp->transfer = FTPTRANSFER_BODY;
|
---|
| 4601 | ftp->downloadsize = 0;
|
---|
| 4602 |
|
---|
| 4603 | /* No need to duplicate user+password, the connectdata struct won't change
|
---|
| 4604 | during a session, but we re-init them here since on subsequent inits
|
---|
| 4605 | since the conn struct may have changed or been replaced.
|
---|
| 4606 | */
|
---|
| 4607 | ftp->user = conn->user;
|
---|
| 4608 | ftp->passwd = conn->passwd;
|
---|
| 4609 | if(isBadFtpString(ftp->user))
|
---|
| 4610 | return CURLE_URL_MALFORMAT;
|
---|
| 4611 | if(isBadFtpString(ftp->passwd))
|
---|
| 4612 | return CURLE_URL_MALFORMAT;
|
---|
| 4613 |
|
---|
| 4614 | conn->proto.ftpc.known_filesize = -1; /* unknown size for now */
|
---|
| 4615 |
|
---|
| 4616 | return CURLE_OK;
|
---|
| 4617 | }
|
---|
| 4618 |
|
---|
| 4619 | #endif /* CURL_DISABLE_FTP */
|
---|