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