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