1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | * RFC1870 SMTP Service Extension for Message Size
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22 | * RFC2195 CRAM-MD5 authentication
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23 | * RFC2831 DIGEST-MD5 authentication
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24 | * RFC3207 SMTP over TLS
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25 | * RFC4422 Simple Authentication and Security Layer (SASL)
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26 | * RFC4616 PLAIN authentication
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27 | * RFC4752 The Kerberos V5 ("GSSAPI") SASL Mechanism
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28 | * RFC4954 SMTP Authentication
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29 | * RFC5321 SMTP protocol
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30 | * RFC6749 OAuth 2.0 Authorization Framework
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31 | * Draft SMTP URL Interface <draft-earhart-url-smtp-00.txt>
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32 | * Draft LOGIN SASL Mechanism <draft-murchison-sasl-login-00.txt>
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33 | *
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34 | ***************************************************************************/
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35 |
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36 | #include "curl_setup.h"
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37 |
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38 | #ifndef CURL_DISABLE_SMTP
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39 |
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40 | #ifdef HAVE_NETINET_IN_H
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41 | #include <netinet/in.h>
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42 | #endif
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43 | #ifdef HAVE_ARPA_INET_H
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44 | #include <arpa/inet.h>
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45 | #endif
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46 | #ifdef HAVE_UTSNAME_H
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47 | #include <sys/utsname.h>
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48 | #endif
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49 | #ifdef HAVE_NETDB_H
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50 | #include <netdb.h>
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51 | #endif
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52 | #ifdef __VMS
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53 | #include <in.h>
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54 | #include <inet.h>
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55 | #endif
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56 |
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57 | #if (defined(NETWARE) && defined(__NOVELL_LIBC__))
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58 | #undef in_addr_t
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59 | #define in_addr_t unsigned long
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60 | #endif
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61 |
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62 | #include <curl/curl.h>
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63 | #include "urldata.h"
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64 | #include "sendf.h"
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65 | #include "hostip.h"
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66 | #include "progress.h"
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67 | #include "transfer.h"
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68 | #include "escape.h"
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69 | #include "http.h" /* for HTTP proxy tunnel stuff */
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70 | #include "mime.h"
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71 | #include "socks.h"
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72 | #include "smtp.h"
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73 | #include "strtoofft.h"
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74 | #include "strcase.h"
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75 | #include "vtls/vtls.h"
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76 | #include "connect.h"
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77 | #include "strerror.h"
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78 | #include "select.h"
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79 | #include "multiif.h"
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80 | #include "url.h"
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81 | #include "curl_gethostname.h"
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82 | #include "curl_sasl.h"
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83 | #include "warnless.h"
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84 | /* The last 3 #include files should be in this order */
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85 | #include "curl_printf.h"
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86 | #include "curl_memory.h"
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87 | #include "memdebug.h"
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88 |
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89 | /* Local API functions */
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90 | static CURLcode smtp_regular_transfer(struct connectdata *conn, bool *done);
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91 | static CURLcode smtp_do(struct connectdata *conn, bool *done);
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92 | static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
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93 | bool premature);
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94 | static CURLcode smtp_connect(struct connectdata *conn, bool *done);
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95 | static CURLcode smtp_disconnect(struct connectdata *conn, bool dead);
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96 | static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
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97 | static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
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98 | int numsocks);
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99 | static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done);
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100 | static CURLcode smtp_setup_connection(struct connectdata *conn);
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101 | static CURLcode smtp_parse_url_options(struct connectdata *conn);
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102 | static CURLcode smtp_parse_url_path(struct connectdata *conn);
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103 | static CURLcode smtp_parse_custom_request(struct connectdata *conn);
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104 | static CURLcode smtp_perform_auth(struct connectdata *conn, const char *mech,
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105 | const char *initresp);
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106 | static CURLcode smtp_continue_auth(struct connectdata *conn, const char *resp);
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107 | static void smtp_get_message(char *buffer, char **outptr);
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108 |
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109 | /*
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110 | * SMTP protocol handler.
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111 | */
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112 |
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113 | const struct Curl_handler Curl_handler_smtp = {
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114 | "SMTP", /* scheme */
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115 | smtp_setup_connection, /* setup_connection */
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116 | smtp_do, /* do_it */
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117 | smtp_done, /* done */
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118 | ZERO_NULL, /* do_more */
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119 | smtp_connect, /* connect_it */
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120 | smtp_multi_statemach, /* connecting */
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121 | smtp_doing, /* doing */
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122 | smtp_getsock, /* proto_getsock */
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123 | smtp_getsock, /* doing_getsock */
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124 | ZERO_NULL, /* domore_getsock */
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125 | ZERO_NULL, /* perform_getsock */
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126 | smtp_disconnect, /* disconnect */
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127 | ZERO_NULL, /* readwrite */
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128 | ZERO_NULL, /* connection_check */
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129 | PORT_SMTP, /* defport */
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130 | CURLPROTO_SMTP, /* protocol */
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131 | PROTOPT_CLOSEACTION | PROTOPT_NOURLQUERY | /* flags */
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132 | PROTOPT_URLOPTIONS
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133 | };
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134 |
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135 | #ifdef USE_SSL
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136 | /*
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137 | * SMTPS protocol handler.
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138 | */
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139 |
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140 | const struct Curl_handler Curl_handler_smtps = {
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141 | "SMTPS", /* scheme */
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142 | smtp_setup_connection, /* setup_connection */
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143 | smtp_do, /* do_it */
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144 | smtp_done, /* done */
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145 | ZERO_NULL, /* do_more */
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146 | smtp_connect, /* connect_it */
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147 | smtp_multi_statemach, /* connecting */
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148 | smtp_doing, /* doing */
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149 | smtp_getsock, /* proto_getsock */
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150 | smtp_getsock, /* doing_getsock */
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151 | ZERO_NULL, /* domore_getsock */
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152 | ZERO_NULL, /* perform_getsock */
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153 | smtp_disconnect, /* disconnect */
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154 | ZERO_NULL, /* readwrite */
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155 | ZERO_NULL, /* connection_check */
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156 | PORT_SMTPS, /* defport */
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157 | CURLPROTO_SMTPS, /* protocol */
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158 | PROTOPT_CLOSEACTION | PROTOPT_SSL
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159 | | PROTOPT_NOURLQUERY | PROTOPT_URLOPTIONS /* flags */
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160 | };
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161 | #endif
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162 |
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163 | /* SASL parameters for the smtp protocol */
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164 | static const struct SASLproto saslsmtp = {
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165 | "smtp", /* The service name */
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166 | 334, /* Code received when continuation is expected */
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167 | 235, /* Code to receive upon authentication success */
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168 | 512 - 8, /* Maximum initial response length (no max) */
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169 | smtp_perform_auth, /* Send authentication command */
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170 | smtp_continue_auth, /* Send authentication continuation */
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171 | smtp_get_message /* Get SASL response message */
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172 | };
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173 |
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174 | #ifdef USE_SSL
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175 | static void smtp_to_smtps(struct connectdata *conn)
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176 | {
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177 | /* Change the connection handler */
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178 | conn->handler = &Curl_handler_smtps;
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179 |
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180 | /* Set the connection's upgraded to TLS flag */
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181 | conn->tls_upgraded = TRUE;
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182 | }
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183 | #else
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184 | #define smtp_to_smtps(x) Curl_nop_stmt
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185 | #endif
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186 |
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187 | /***********************************************************************
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188 | *
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189 | * smtp_endofresp()
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190 | *
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191 | * Checks for an ending SMTP status code at the start of the given string, but
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192 | * also detects various capabilities from the EHLO response including the
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193 | * supported authentication mechanisms.
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194 | */
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195 | static bool smtp_endofresp(struct connectdata *conn, char *line, size_t len,
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196 | int *resp)
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197 | {
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198 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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199 | bool result = FALSE;
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200 |
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201 | /* Nothing for us */
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202 | if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2]))
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203 | return FALSE;
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204 |
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205 | /* Do we have a command response? This should be the response code followed
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206 | by a space and optionally some text as per RFC-5321 and as outlined in
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207 | Section 4. Examples of RFC-4954 but some e-mail servers ignore this and
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208 | only send the response code instead as per Section 4.2. */
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209 | if(line[3] == ' ' || len == 5) {
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210 | result = TRUE;
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211 | *resp = curlx_sltosi(strtol(line, NULL, 10));
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212 |
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213 | /* Make sure real server never sends internal value */
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214 | if(*resp == 1)
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215 | *resp = 0;
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216 | }
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217 | /* Do we have a multiline (continuation) response? */
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218 | else if(line[3] == '-' &&
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219 | (smtpc->state == SMTP_EHLO || smtpc->state == SMTP_COMMAND)) {
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220 | result = TRUE;
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221 | *resp = 1; /* Internal response code */
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222 | }
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223 |
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224 | return result;
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225 | }
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226 |
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227 | /***********************************************************************
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228 | *
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229 | * smtp_get_message()
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230 | *
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231 | * Gets the authentication message from the response buffer.
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232 | */
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233 | static void smtp_get_message(char *buffer, char **outptr)
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234 | {
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235 | size_t len = 0;
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236 | char *message = NULL;
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237 |
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238 | /* Find the start of the message */
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239 | for(message = buffer + 4; *message == ' ' || *message == '\t'; message++)
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240 | ;
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241 |
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242 | /* Find the end of the message */
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243 | for(len = strlen(message); len--;)
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244 | if(message[len] != '\r' && message[len] != '\n' && message[len] != ' ' &&
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245 | message[len] != '\t')
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246 | break;
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247 |
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248 | /* Terminate the message */
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249 | if(++len) {
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250 | message[len] = '\0';
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251 | }
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252 |
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253 | *outptr = message;
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254 | }
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255 |
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256 | /***********************************************************************
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257 | *
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258 | * state()
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259 | *
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260 | * This is the ONLY way to change SMTP state!
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261 | */
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262 | static void state(struct connectdata *conn, smtpstate newstate)
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263 | {
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264 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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265 | #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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266 | /* for debug purposes */
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267 | static const char * const names[] = {
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268 | "STOP",
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269 | "SERVERGREET",
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270 | "EHLO",
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271 | "HELO",
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272 | "STARTTLS",
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273 | "UPGRADETLS",
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274 | "AUTH",
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275 | "COMMAND",
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276 | "MAIL",
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277 | "RCPT",
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278 | "DATA",
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279 | "POSTDATA",
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280 | "QUIT",
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281 | /* LAST */
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282 | };
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283 |
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284 | if(smtpc->state != newstate)
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285 | infof(conn->data, "SMTP %p state change from %s to %s\n",
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286 | (void *)smtpc, names[smtpc->state], names[newstate]);
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287 | #endif
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288 |
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289 | smtpc->state = newstate;
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290 | }
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291 |
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292 | /***********************************************************************
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293 | *
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294 | * smtp_perform_ehlo()
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295 | *
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296 | * Sends the EHLO command to not only initialise communication with the ESMTP
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297 | * server but to also obtain a list of server side supported capabilities.
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298 | */
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299 | static CURLcode smtp_perform_ehlo(struct connectdata *conn)
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300 | {
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301 | CURLcode result = CURLE_OK;
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302 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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303 |
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304 | smtpc->sasl.authmechs = SASL_AUTH_NONE; /* No known auth. mechanism yet */
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305 | smtpc->sasl.authused = SASL_AUTH_NONE; /* Clear the authentication mechanism
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306 | used for esmtp connections */
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307 | smtpc->tls_supported = FALSE; /* Clear the TLS capability */
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308 | smtpc->auth_supported = FALSE; /* Clear the AUTH capability */
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309 |
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310 | /* Send the EHLO command */
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311 | result = Curl_pp_sendf(&smtpc->pp, "EHLO %s", smtpc->domain);
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312 |
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313 | if(!result)
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314 | state(conn, SMTP_EHLO);
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315 |
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316 | return result;
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317 | }
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318 |
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319 | /***********************************************************************
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320 | *
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321 | * smtp_perform_helo()
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322 | *
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323 | * Sends the HELO command to initialise communication with the SMTP server.
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324 | */
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325 | static CURLcode smtp_perform_helo(struct connectdata *conn)
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326 | {
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327 | CURLcode result = CURLE_OK;
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328 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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329 |
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330 | smtpc->sasl.authused = SASL_AUTH_NONE; /* No authentication mechanism used
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331 | in smtp connections */
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332 |
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333 | /* Send the HELO command */
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334 | result = Curl_pp_sendf(&smtpc->pp, "HELO %s", smtpc->domain);
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335 |
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336 | if(!result)
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337 | state(conn, SMTP_HELO);
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338 |
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339 | return result;
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340 | }
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341 |
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342 | /***********************************************************************
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343 | *
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344 | * smtp_perform_starttls()
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345 | *
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346 | * Sends the STLS command to start the upgrade to TLS.
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347 | */
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348 | static CURLcode smtp_perform_starttls(struct connectdata *conn)
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349 | {
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350 | CURLcode result = CURLE_OK;
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351 |
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352 | /* Send the STARTTLS command */
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353 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "STARTTLS");
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354 |
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355 | if(!result)
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356 | state(conn, SMTP_STARTTLS);
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357 |
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358 | return result;
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359 | }
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360 |
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361 | /***********************************************************************
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362 | *
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363 | * smtp_perform_upgrade_tls()
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364 | *
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365 | * Performs the upgrade to TLS.
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366 | */
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367 | static CURLcode smtp_perform_upgrade_tls(struct connectdata *conn)
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368 | {
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369 | CURLcode result = CURLE_OK;
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370 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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371 |
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372 | /* Start the SSL connection */
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373 | result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
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374 |
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375 | if(!result) {
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376 | if(smtpc->state != SMTP_UPGRADETLS)
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377 | state(conn, SMTP_UPGRADETLS);
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378 |
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379 | if(smtpc->ssldone) {
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380 | smtp_to_smtps(conn);
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381 | result = smtp_perform_ehlo(conn);
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382 | }
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383 | }
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384 |
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385 | return result;
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386 | }
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387 |
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388 | /***********************************************************************
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389 | *
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390 | * smtp_perform_auth()
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391 | *
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392 | * Sends an AUTH command allowing the client to login with the given SASL
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393 | * authentication mechanism.
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394 | */
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395 | static CURLcode smtp_perform_auth(struct connectdata *conn,
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396 | const char *mech,
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397 | const char *initresp)
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398 | {
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399 | CURLcode result = CURLE_OK;
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400 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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401 |
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402 | if(initresp) { /* AUTH <mech> ...<crlf> */
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403 | /* Send the AUTH command with the initial response */
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404 | result = Curl_pp_sendf(&smtpc->pp, "AUTH %s %s", mech, initresp);
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405 | }
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406 | else {
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407 | /* Send the AUTH command */
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408 | result = Curl_pp_sendf(&smtpc->pp, "AUTH %s", mech);
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409 | }
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410 |
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411 | return result;
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412 | }
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413 |
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414 | /***********************************************************************
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415 | *
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416 | * smtp_continue_auth()
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417 | *
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418 | * Sends SASL continuation data or cancellation.
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419 | */
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420 | static CURLcode smtp_continue_auth(struct connectdata *conn, const char *resp)
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421 | {
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422 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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423 |
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424 | return Curl_pp_sendf(&smtpc->pp, "%s", resp);
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425 | }
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426 |
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427 | /***********************************************************************
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428 | *
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429 | * smtp_perform_authentication()
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430 | *
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431 | * Initiates the authentication sequence, with the appropriate SASL
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432 | * authentication mechanism.
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433 | */
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434 | static CURLcode smtp_perform_authentication(struct connectdata *conn)
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435 | {
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436 | CURLcode result = CURLE_OK;
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437 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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438 | saslprogress progress;
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439 |
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440 | /* Check we have enough data to authenticate with, and the
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441 | server supports authentiation, and end the connect phase if not */
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442 | if(!smtpc->auth_supported ||
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443 | !Curl_sasl_can_authenticate(&smtpc->sasl, conn)) {
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444 | state(conn, SMTP_STOP);
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445 | return result;
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446 | }
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447 |
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448 | /* Calculate the SASL login details */
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449 | result = Curl_sasl_start(&smtpc->sasl, conn, FALSE, &progress);
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450 |
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451 | if(!result) {
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452 | if(progress == SASL_INPROGRESS)
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453 | state(conn, SMTP_AUTH);
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454 | else {
|
---|
455 | /* Other mechanisms not supported */
|
---|
456 | infof(conn->data, "No known authentication mechanisms supported!\n");
|
---|
457 | result = CURLE_LOGIN_DENIED;
|
---|
458 | }
|
---|
459 | }
|
---|
460 |
|
---|
461 | return result;
|
---|
462 | }
|
---|
463 |
|
---|
464 | /***********************************************************************
|
---|
465 | *
|
---|
466 | * smtp_perform_command()
|
---|
467 | *
|
---|
468 | * Sends a SMTP based command.
|
---|
469 | */
|
---|
470 | static CURLcode smtp_perform_command(struct connectdata *conn)
|
---|
471 | {
|
---|
472 | CURLcode result = CURLE_OK;
|
---|
473 | struct Curl_easy *data = conn->data;
|
---|
474 | struct SMTP *smtp = data->req.protop;
|
---|
475 |
|
---|
476 | /* Send the command */
|
---|
477 | if(smtp->rcpt)
|
---|
478 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s %s",
|
---|
479 | smtp->custom && smtp->custom[0] != '\0' ?
|
---|
480 | smtp->custom : "VRFY",
|
---|
481 | smtp->rcpt->data);
|
---|
482 | else
|
---|
483 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s",
|
---|
484 | smtp->custom && smtp->custom[0] != '\0' ?
|
---|
485 | smtp->custom : "HELP");
|
---|
486 |
|
---|
487 | if(!result)
|
---|
488 | state(conn, SMTP_COMMAND);
|
---|
489 |
|
---|
490 | return result;
|
---|
491 | }
|
---|
492 |
|
---|
493 | /***********************************************************************
|
---|
494 | *
|
---|
495 | * smtp_perform_mail()
|
---|
496 | *
|
---|
497 | * Sends an MAIL command to initiate the upload of a message.
|
---|
498 | */
|
---|
499 | static CURLcode smtp_perform_mail(struct connectdata *conn)
|
---|
500 | {
|
---|
501 | char *from = NULL;
|
---|
502 | char *auth = NULL;
|
---|
503 | char *size = NULL;
|
---|
504 | CURLcode result = CURLE_OK;
|
---|
505 | struct Curl_easy *data = conn->data;
|
---|
506 |
|
---|
507 | /* Calculate the FROM parameter */
|
---|
508 | if(!data->set.str[STRING_MAIL_FROM])
|
---|
509 | /* Null reverse-path, RFC-5321, sect. 3.6.3 */
|
---|
510 | from = strdup("<>");
|
---|
511 | else if(data->set.str[STRING_MAIL_FROM][0] == '<')
|
---|
512 | from = aprintf("%s", data->set.str[STRING_MAIL_FROM]);
|
---|
513 | else
|
---|
514 | from = aprintf("<%s>", data->set.str[STRING_MAIL_FROM]);
|
---|
515 |
|
---|
516 | if(!from)
|
---|
517 | return CURLE_OUT_OF_MEMORY;
|
---|
518 |
|
---|
519 | /* Calculate the optional AUTH parameter */
|
---|
520 | if(data->set.str[STRING_MAIL_AUTH] && conn->proto.smtpc.sasl.authused) {
|
---|
521 | if(data->set.str[STRING_MAIL_AUTH][0] != '\0')
|
---|
522 | auth = aprintf("%s", data->set.str[STRING_MAIL_AUTH]);
|
---|
523 | else
|
---|
524 | /* Empty AUTH, RFC-2554, sect. 5 */
|
---|
525 | auth = strdup("<>");
|
---|
526 |
|
---|
527 | if(!auth) {
|
---|
528 | free(from);
|
---|
529 |
|
---|
530 | return CURLE_OUT_OF_MEMORY;
|
---|
531 | }
|
---|
532 | }
|
---|
533 |
|
---|
534 | /* Prepare the mime data if some. */
|
---|
535 | if(data->set.mimepost.kind != MIMEKIND_NONE) {
|
---|
536 | /* Use the whole structure as data. */
|
---|
537 | data->set.mimepost.flags &= ~MIME_BODY_ONLY;
|
---|
538 |
|
---|
539 | /* Add external headers and mime version. */
|
---|
540 | curl_mime_headers(&data->set.mimepost, data->set.headers, 0);
|
---|
541 | result = Curl_mime_prepare_headers(&data->set.mimepost, NULL,
|
---|
542 | NULL, MIMESTRATEGY_MAIL);
|
---|
543 |
|
---|
544 | if(!result)
|
---|
545 | if(!Curl_checkheaders(conn, "Mime-Version"))
|
---|
546 | result = Curl_mime_add_header(&data->set.mimepost.curlheaders,
|
---|
547 | "Mime-Version: 1.0");
|
---|
548 |
|
---|
549 | /* Make sure we will read the entire mime structure. */
|
---|
550 | if(!result)
|
---|
551 | result = Curl_mime_rewind(&data->set.mimepost);
|
---|
552 |
|
---|
553 | if(result) {
|
---|
554 | free(from);
|
---|
555 | free(auth);
|
---|
556 | return result;
|
---|
557 | }
|
---|
558 |
|
---|
559 | data->state.infilesize = Curl_mime_size(&data->set.mimepost);
|
---|
560 |
|
---|
561 | /* Read from mime structure. */
|
---|
562 | data->state.fread_func = (curl_read_callback) Curl_mime_read;
|
---|
563 | data->state.in = (void *) &data->set.mimepost;
|
---|
564 | }
|
---|
565 |
|
---|
566 | /* Calculate the optional SIZE parameter */
|
---|
567 | if(conn->proto.smtpc.size_supported && data->state.infilesize > 0) {
|
---|
568 | size = aprintf("%" CURL_FORMAT_CURL_OFF_T, data->state.infilesize);
|
---|
569 |
|
---|
570 | if(!size) {
|
---|
571 | free(from);
|
---|
572 | free(auth);
|
---|
573 |
|
---|
574 | return CURLE_OUT_OF_MEMORY;
|
---|
575 | }
|
---|
576 | }
|
---|
577 |
|
---|
578 | /* Send the MAIL command */
|
---|
579 | if(!auth && !size)
|
---|
580 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
581 | "MAIL FROM:%s", from);
|
---|
582 | else if(auth && !size)
|
---|
583 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
584 | "MAIL FROM:%s AUTH=%s", from, auth);
|
---|
585 | else if(auth && size)
|
---|
586 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
587 | "MAIL FROM:%s AUTH=%s SIZE=%s", from, auth, size);
|
---|
588 | else
|
---|
589 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
590 | "MAIL FROM:%s SIZE=%s", from, size);
|
---|
591 |
|
---|
592 | free(from);
|
---|
593 | free(auth);
|
---|
594 | free(size);
|
---|
595 |
|
---|
596 | if(!result)
|
---|
597 | state(conn, SMTP_MAIL);
|
---|
598 |
|
---|
599 | return result;
|
---|
600 | }
|
---|
601 |
|
---|
602 | /***********************************************************************
|
---|
603 | *
|
---|
604 | * smtp_perform_rcpt_to()
|
---|
605 | *
|
---|
606 | * Sends a RCPT TO command for a given recipient as part of the message upload
|
---|
607 | * process.
|
---|
608 | */
|
---|
609 | static CURLcode smtp_perform_rcpt_to(struct connectdata *conn)
|
---|
610 | {
|
---|
611 | CURLcode result = CURLE_OK;
|
---|
612 | struct Curl_easy *data = conn->data;
|
---|
613 | struct SMTP *smtp = data->req.protop;
|
---|
614 |
|
---|
615 | /* Send the RCPT TO command */
|
---|
616 | if(smtp->rcpt->data[0] == '<')
|
---|
617 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s",
|
---|
618 | smtp->rcpt->data);
|
---|
619 | else
|
---|
620 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:<%s>",
|
---|
621 | smtp->rcpt->data);
|
---|
622 | if(!result)
|
---|
623 | state(conn, SMTP_RCPT);
|
---|
624 |
|
---|
625 | return result;
|
---|
626 | }
|
---|
627 |
|
---|
628 | /***********************************************************************
|
---|
629 | *
|
---|
630 | * smtp_perform_quit()
|
---|
631 | *
|
---|
632 | * Performs the quit action prior to sclose() being called.
|
---|
633 | */
|
---|
634 | static CURLcode smtp_perform_quit(struct connectdata *conn)
|
---|
635 | {
|
---|
636 | CURLcode result = CURLE_OK;
|
---|
637 |
|
---|
638 | /* Send the QUIT command */
|
---|
639 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "QUIT");
|
---|
640 |
|
---|
641 | if(!result)
|
---|
642 | state(conn, SMTP_QUIT);
|
---|
643 |
|
---|
644 | return result;
|
---|
645 | }
|
---|
646 |
|
---|
647 | /* For the initial server greeting */
|
---|
648 | static CURLcode smtp_state_servergreet_resp(struct connectdata *conn,
|
---|
649 | int smtpcode,
|
---|
650 | smtpstate instate)
|
---|
651 | {
|
---|
652 | CURLcode result = CURLE_OK;
|
---|
653 | struct Curl_easy *data = conn->data;
|
---|
654 |
|
---|
655 | (void)instate; /* no use for this yet */
|
---|
656 |
|
---|
657 | if(smtpcode/100 != 2) {
|
---|
658 | failf(data, "Got unexpected smtp-server response: %d", smtpcode);
|
---|
659 | result = CURLE_WEIRD_SERVER_REPLY;
|
---|
660 | }
|
---|
661 | else
|
---|
662 | result = smtp_perform_ehlo(conn);
|
---|
663 |
|
---|
664 | return result;
|
---|
665 | }
|
---|
666 |
|
---|
667 | /* For STARTTLS responses */
|
---|
668 | static CURLcode smtp_state_starttls_resp(struct connectdata *conn,
|
---|
669 | int smtpcode,
|
---|
670 | smtpstate instate)
|
---|
671 | {
|
---|
672 | CURLcode result = CURLE_OK;
|
---|
673 | struct Curl_easy *data = conn->data;
|
---|
674 |
|
---|
675 | (void)instate; /* no use for this yet */
|
---|
676 |
|
---|
677 | if(smtpcode != 220) {
|
---|
678 | if(data->set.use_ssl != CURLUSESSL_TRY) {
|
---|
679 | failf(data, "STARTTLS denied, code %d", smtpcode);
|
---|
680 | result = CURLE_USE_SSL_FAILED;
|
---|
681 | }
|
---|
682 | else
|
---|
683 | result = smtp_perform_authentication(conn);
|
---|
684 | }
|
---|
685 | else
|
---|
686 | result = smtp_perform_upgrade_tls(conn);
|
---|
687 |
|
---|
688 | return result;
|
---|
689 | }
|
---|
690 |
|
---|
691 | /* For EHLO responses */
|
---|
692 | static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
|
---|
693 | smtpstate instate)
|
---|
694 | {
|
---|
695 | CURLcode result = CURLE_OK;
|
---|
696 | struct Curl_easy *data = conn->data;
|
---|
697 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
698 | const char *line = data->state.buffer;
|
---|
699 | size_t len = strlen(line);
|
---|
700 | size_t wordlen;
|
---|
701 |
|
---|
702 | (void)instate; /* no use for this yet */
|
---|
703 |
|
---|
704 | if(smtpcode/100 != 2 && smtpcode != 1) {
|
---|
705 | if(data->set.use_ssl <= CURLUSESSL_TRY || conn->ssl[FIRSTSOCKET].use)
|
---|
706 | result = smtp_perform_helo(conn);
|
---|
707 | else {
|
---|
708 | failf(data, "Remote access denied: %d", smtpcode);
|
---|
709 | result = CURLE_REMOTE_ACCESS_DENIED;
|
---|
710 | }
|
---|
711 | }
|
---|
712 | else {
|
---|
713 | line += 4;
|
---|
714 | len -= 4;
|
---|
715 |
|
---|
716 | /* Does the server support the STARTTLS capability? */
|
---|
717 | if(len >= 8 && !memcmp(line, "STARTTLS", 8))
|
---|
718 | smtpc->tls_supported = TRUE;
|
---|
719 |
|
---|
720 | /* Does the server support the SIZE capability? */
|
---|
721 | else if(len >= 4 && !memcmp(line, "SIZE", 4))
|
---|
722 | smtpc->size_supported = TRUE;
|
---|
723 |
|
---|
724 | /* Does the server support authentication? */
|
---|
725 | else if(len >= 5 && !memcmp(line, "AUTH ", 5)) {
|
---|
726 | smtpc->auth_supported = TRUE;
|
---|
727 |
|
---|
728 | /* Advance past the AUTH keyword */
|
---|
729 | line += 5;
|
---|
730 | len -= 5;
|
---|
731 |
|
---|
732 | /* Loop through the data line */
|
---|
733 | for(;;) {
|
---|
734 | size_t llen;
|
---|
735 | unsigned int mechbit;
|
---|
736 |
|
---|
737 | while(len &&
|
---|
738 | (*line == ' ' || *line == '\t' ||
|
---|
739 | *line == '\r' || *line == '\n')) {
|
---|
740 |
|
---|
741 | line++;
|
---|
742 | len--;
|
---|
743 | }
|
---|
744 |
|
---|
745 | if(!len)
|
---|
746 | break;
|
---|
747 |
|
---|
748 | /* Extract the word */
|
---|
749 | for(wordlen = 0; wordlen < len && line[wordlen] != ' ' &&
|
---|
750 | line[wordlen] != '\t' && line[wordlen] != '\r' &&
|
---|
751 | line[wordlen] != '\n';)
|
---|
752 | wordlen++;
|
---|
753 |
|
---|
754 | /* Test the word for a matching authentication mechanism */
|
---|
755 | mechbit = Curl_sasl_decode_mech(line, wordlen, &llen);
|
---|
756 | if(mechbit && llen == wordlen)
|
---|
757 | smtpc->sasl.authmechs |= mechbit;
|
---|
758 |
|
---|
759 | line += wordlen;
|
---|
760 | len -= wordlen;
|
---|
761 | }
|
---|
762 | }
|
---|
763 |
|
---|
764 | if(smtpcode != 1) {
|
---|
765 | if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
|
---|
766 | /* We don't have a SSL/TLS connection yet, but SSL is requested */
|
---|
767 | if(smtpc->tls_supported)
|
---|
768 | /* Switch to TLS connection now */
|
---|
769 | result = smtp_perform_starttls(conn);
|
---|
770 | else if(data->set.use_ssl == CURLUSESSL_TRY)
|
---|
771 | /* Fallback and carry on with authentication */
|
---|
772 | result = smtp_perform_authentication(conn);
|
---|
773 | else {
|
---|
774 | failf(data, "STARTTLS not supported.");
|
---|
775 | result = CURLE_USE_SSL_FAILED;
|
---|
776 | }
|
---|
777 | }
|
---|
778 | else
|
---|
779 | result = smtp_perform_authentication(conn);
|
---|
780 | }
|
---|
781 | }
|
---|
782 |
|
---|
783 | return result;
|
---|
784 | }
|
---|
785 |
|
---|
786 | /* For HELO responses */
|
---|
787 | static CURLcode smtp_state_helo_resp(struct connectdata *conn, int smtpcode,
|
---|
788 | smtpstate instate)
|
---|
789 | {
|
---|
790 | CURLcode result = CURLE_OK;
|
---|
791 | struct Curl_easy *data = conn->data;
|
---|
792 |
|
---|
793 | (void)instate; /* no use for this yet */
|
---|
794 |
|
---|
795 | if(smtpcode/100 != 2) {
|
---|
796 | failf(data, "Remote access denied: %d", smtpcode);
|
---|
797 | result = CURLE_REMOTE_ACCESS_DENIED;
|
---|
798 | }
|
---|
799 | else
|
---|
800 | /* End of connect phase */
|
---|
801 | state(conn, SMTP_STOP);
|
---|
802 |
|
---|
803 | return result;
|
---|
804 | }
|
---|
805 |
|
---|
806 | /* For SASL authentication responses */
|
---|
807 | static CURLcode smtp_state_auth_resp(struct connectdata *conn,
|
---|
808 | int smtpcode,
|
---|
809 | smtpstate instate)
|
---|
810 | {
|
---|
811 | CURLcode result = CURLE_OK;
|
---|
812 | struct Curl_easy *data = conn->data;
|
---|
813 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
814 | saslprogress progress;
|
---|
815 |
|
---|
816 | (void)instate; /* no use for this yet */
|
---|
817 |
|
---|
818 | result = Curl_sasl_continue(&smtpc->sasl, conn, smtpcode, &progress);
|
---|
819 | if(!result)
|
---|
820 | switch(progress) {
|
---|
821 | case SASL_DONE:
|
---|
822 | state(conn, SMTP_STOP); /* Authenticated */
|
---|
823 | break;
|
---|
824 | case SASL_IDLE: /* No mechanism left after cancellation */
|
---|
825 | failf(data, "Authentication cancelled");
|
---|
826 | result = CURLE_LOGIN_DENIED;
|
---|
827 | break;
|
---|
828 | default:
|
---|
829 | break;
|
---|
830 | }
|
---|
831 |
|
---|
832 | return result;
|
---|
833 | }
|
---|
834 |
|
---|
835 | /* For command responses */
|
---|
836 | static CURLcode smtp_state_command_resp(struct connectdata *conn, int smtpcode,
|
---|
837 | smtpstate instate)
|
---|
838 | {
|
---|
839 | CURLcode result = CURLE_OK;
|
---|
840 | struct Curl_easy *data = conn->data;
|
---|
841 | struct SMTP *smtp = data->req.protop;
|
---|
842 | char *line = data->state.buffer;
|
---|
843 | size_t len = strlen(line);
|
---|
844 |
|
---|
845 | (void)instate; /* no use for this yet */
|
---|
846 |
|
---|
847 | if((smtp->rcpt && smtpcode/100 != 2 && smtpcode != 553 && smtpcode != 1) ||
|
---|
848 | (!smtp->rcpt && smtpcode/100 != 2 && smtpcode != 1)) {
|
---|
849 | failf(data, "Command failed: %d", smtpcode);
|
---|
850 | result = CURLE_RECV_ERROR;
|
---|
851 | }
|
---|
852 | else {
|
---|
853 | /* Temporarily add the LF character back and send as body to the client */
|
---|
854 | if(!data->set.opt_no_body) {
|
---|
855 | line[len] = '\n';
|
---|
856 | result = Curl_client_write(conn, CLIENTWRITE_BODY, line, len + 1);
|
---|
857 | line[len] = '\0';
|
---|
858 | }
|
---|
859 |
|
---|
860 | if(smtpcode != 1) {
|
---|
861 | if(smtp->rcpt) {
|
---|
862 | smtp->rcpt = smtp->rcpt->next;
|
---|
863 |
|
---|
864 | if(smtp->rcpt) {
|
---|
865 | /* Send the next command */
|
---|
866 | result = smtp_perform_command(conn);
|
---|
867 | }
|
---|
868 | else
|
---|
869 | /* End of DO phase */
|
---|
870 | state(conn, SMTP_STOP);
|
---|
871 | }
|
---|
872 | else
|
---|
873 | /* End of DO phase */
|
---|
874 | state(conn, SMTP_STOP);
|
---|
875 | }
|
---|
876 | }
|
---|
877 |
|
---|
878 | return result;
|
---|
879 | }
|
---|
880 |
|
---|
881 | /* For MAIL responses */
|
---|
882 | static CURLcode smtp_state_mail_resp(struct connectdata *conn, int smtpcode,
|
---|
883 | smtpstate instate)
|
---|
884 | {
|
---|
885 | CURLcode result = CURLE_OK;
|
---|
886 | struct Curl_easy *data = conn->data;
|
---|
887 |
|
---|
888 | (void)instate; /* no use for this yet */
|
---|
889 |
|
---|
890 | if(smtpcode/100 != 2) {
|
---|
891 | failf(data, "MAIL failed: %d", smtpcode);
|
---|
892 | result = CURLE_SEND_ERROR;
|
---|
893 | }
|
---|
894 | else
|
---|
895 | /* Start the RCPT TO command */
|
---|
896 | result = smtp_perform_rcpt_to(conn);
|
---|
897 |
|
---|
898 | return result;
|
---|
899 | }
|
---|
900 |
|
---|
901 | /* For RCPT responses */
|
---|
902 | static CURLcode smtp_state_rcpt_resp(struct connectdata *conn, int smtpcode,
|
---|
903 | smtpstate instate)
|
---|
904 | {
|
---|
905 | CURLcode result = CURLE_OK;
|
---|
906 | struct Curl_easy *data = conn->data;
|
---|
907 | struct SMTP *smtp = data->req.protop;
|
---|
908 |
|
---|
909 | (void)instate; /* no use for this yet */
|
---|
910 |
|
---|
911 | if(smtpcode/100 != 2) {
|
---|
912 | failf(data, "RCPT failed: %d", smtpcode);
|
---|
913 | result = CURLE_SEND_ERROR;
|
---|
914 | }
|
---|
915 | else {
|
---|
916 | smtp->rcpt = smtp->rcpt->next;
|
---|
917 |
|
---|
918 | if(smtp->rcpt)
|
---|
919 | /* Send the next RCPT TO command */
|
---|
920 | result = smtp_perform_rcpt_to(conn);
|
---|
921 | else {
|
---|
922 | /* Send the DATA command */
|
---|
923 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "DATA");
|
---|
924 |
|
---|
925 | if(!result)
|
---|
926 | state(conn, SMTP_DATA);
|
---|
927 | }
|
---|
928 | }
|
---|
929 |
|
---|
930 | return result;
|
---|
931 | }
|
---|
932 |
|
---|
933 | /* For DATA response */
|
---|
934 | static CURLcode smtp_state_data_resp(struct connectdata *conn, int smtpcode,
|
---|
935 | smtpstate instate)
|
---|
936 | {
|
---|
937 | CURLcode result = CURLE_OK;
|
---|
938 | struct Curl_easy *data = conn->data;
|
---|
939 |
|
---|
940 | (void)instate; /* no use for this yet */
|
---|
941 |
|
---|
942 | if(smtpcode != 354) {
|
---|
943 | failf(data, "DATA failed: %d", smtpcode);
|
---|
944 | result = CURLE_SEND_ERROR;
|
---|
945 | }
|
---|
946 | else {
|
---|
947 | /* Set the progress upload size */
|
---|
948 | Curl_pgrsSetUploadSize(data, data->state.infilesize);
|
---|
949 |
|
---|
950 | /* SMTP upload */
|
---|
951 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
|
---|
952 |
|
---|
953 | /* End of DO phase */
|
---|
954 | state(conn, SMTP_STOP);
|
---|
955 | }
|
---|
956 |
|
---|
957 | return result;
|
---|
958 | }
|
---|
959 |
|
---|
960 | /* For POSTDATA responses, which are received after the entire DATA
|
---|
961 | part has been sent to the server */
|
---|
962 | static CURLcode smtp_state_postdata_resp(struct connectdata *conn,
|
---|
963 | int smtpcode,
|
---|
964 | smtpstate instate)
|
---|
965 | {
|
---|
966 | CURLcode result = CURLE_OK;
|
---|
967 |
|
---|
968 | (void)instate; /* no use for this yet */
|
---|
969 |
|
---|
970 | if(smtpcode != 250)
|
---|
971 | result = CURLE_RECV_ERROR;
|
---|
972 |
|
---|
973 | /* End of DONE phase */
|
---|
974 | state(conn, SMTP_STOP);
|
---|
975 |
|
---|
976 | return result;
|
---|
977 | }
|
---|
978 |
|
---|
979 | static CURLcode smtp_statemach_act(struct connectdata *conn)
|
---|
980 | {
|
---|
981 | CURLcode result = CURLE_OK;
|
---|
982 | curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
---|
983 | struct Curl_easy *data = conn->data;
|
---|
984 | int smtpcode;
|
---|
985 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
986 | struct pingpong *pp = &smtpc->pp;
|
---|
987 | size_t nread = 0;
|
---|
988 |
|
---|
989 | /* Busy upgrading the connection; right now all I/O is SSL/TLS, not SMTP */
|
---|
990 | if(smtpc->state == SMTP_UPGRADETLS)
|
---|
991 | return smtp_perform_upgrade_tls(conn);
|
---|
992 |
|
---|
993 | /* Flush any data that needs to be sent */
|
---|
994 | if(pp->sendleft)
|
---|
995 | return Curl_pp_flushsend(pp);
|
---|
996 |
|
---|
997 | do {
|
---|
998 | /* Read the response from the server */
|
---|
999 | result = Curl_pp_readresp(sock, pp, &smtpcode, &nread);
|
---|
1000 | if(result)
|
---|
1001 | return result;
|
---|
1002 |
|
---|
1003 | /* Store the latest response for later retrieval if necessary */
|
---|
1004 | if(smtpc->state != SMTP_QUIT && smtpcode != 1)
|
---|
1005 | data->info.httpcode = smtpcode;
|
---|
1006 |
|
---|
1007 | if(!smtpcode)
|
---|
1008 | break;
|
---|
1009 |
|
---|
1010 | /* We have now received a full SMTP server response */
|
---|
1011 | switch(smtpc->state) {
|
---|
1012 | case SMTP_SERVERGREET:
|
---|
1013 | result = smtp_state_servergreet_resp(conn, smtpcode, smtpc->state);
|
---|
1014 | break;
|
---|
1015 |
|
---|
1016 | case SMTP_EHLO:
|
---|
1017 | result = smtp_state_ehlo_resp(conn, smtpcode, smtpc->state);
|
---|
1018 | break;
|
---|
1019 |
|
---|
1020 | case SMTP_HELO:
|
---|
1021 | result = smtp_state_helo_resp(conn, smtpcode, smtpc->state);
|
---|
1022 | break;
|
---|
1023 |
|
---|
1024 | case SMTP_STARTTLS:
|
---|
1025 | result = smtp_state_starttls_resp(conn, smtpcode, smtpc->state);
|
---|
1026 | break;
|
---|
1027 |
|
---|
1028 | case SMTP_AUTH:
|
---|
1029 | result = smtp_state_auth_resp(conn, smtpcode, smtpc->state);
|
---|
1030 | break;
|
---|
1031 |
|
---|
1032 | case SMTP_COMMAND:
|
---|
1033 | result = smtp_state_command_resp(conn, smtpcode, smtpc->state);
|
---|
1034 | break;
|
---|
1035 |
|
---|
1036 | case SMTP_MAIL:
|
---|
1037 | result = smtp_state_mail_resp(conn, smtpcode, smtpc->state);
|
---|
1038 | break;
|
---|
1039 |
|
---|
1040 | case SMTP_RCPT:
|
---|
1041 | result = smtp_state_rcpt_resp(conn, smtpcode, smtpc->state);
|
---|
1042 | break;
|
---|
1043 |
|
---|
1044 | case SMTP_DATA:
|
---|
1045 | result = smtp_state_data_resp(conn, smtpcode, smtpc->state);
|
---|
1046 | break;
|
---|
1047 |
|
---|
1048 | case SMTP_POSTDATA:
|
---|
1049 | result = smtp_state_postdata_resp(conn, smtpcode, smtpc->state);
|
---|
1050 | break;
|
---|
1051 |
|
---|
1052 | case SMTP_QUIT:
|
---|
1053 | /* fallthrough, just stop! */
|
---|
1054 | default:
|
---|
1055 | /* internal error */
|
---|
1056 | state(conn, SMTP_STOP);
|
---|
1057 | break;
|
---|
1058 | }
|
---|
1059 | } while(!result && smtpc->state != SMTP_STOP && Curl_pp_moredata(pp));
|
---|
1060 |
|
---|
1061 | return result;
|
---|
1062 | }
|
---|
1063 |
|
---|
1064 | /* Called repeatedly until done from multi.c */
|
---|
1065 | static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done)
|
---|
1066 | {
|
---|
1067 | CURLcode result = CURLE_OK;
|
---|
1068 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1069 |
|
---|
1070 | if((conn->handler->flags & PROTOPT_SSL) && !smtpc->ssldone) {
|
---|
1071 | result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
|
---|
1072 | if(result || !smtpc->ssldone)
|
---|
1073 | return result;
|
---|
1074 | }
|
---|
1075 |
|
---|
1076 | result = Curl_pp_statemach(&smtpc->pp, FALSE);
|
---|
1077 | *done = (smtpc->state == SMTP_STOP) ? TRUE : FALSE;
|
---|
1078 |
|
---|
1079 | return result;
|
---|
1080 | }
|
---|
1081 |
|
---|
1082 | static CURLcode smtp_block_statemach(struct connectdata *conn)
|
---|
1083 | {
|
---|
1084 | CURLcode result = CURLE_OK;
|
---|
1085 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1086 |
|
---|
1087 | while(smtpc->state != SMTP_STOP && !result)
|
---|
1088 | result = Curl_pp_statemach(&smtpc->pp, TRUE);
|
---|
1089 |
|
---|
1090 | return result;
|
---|
1091 | }
|
---|
1092 |
|
---|
1093 | /* Allocate and initialize the SMTP struct for the current Curl_easy if
|
---|
1094 | required */
|
---|
1095 | static CURLcode smtp_init(struct connectdata *conn)
|
---|
1096 | {
|
---|
1097 | CURLcode result = CURLE_OK;
|
---|
1098 | struct Curl_easy *data = conn->data;
|
---|
1099 | struct SMTP *smtp;
|
---|
1100 |
|
---|
1101 | smtp = data->req.protop = calloc(sizeof(struct SMTP), 1);
|
---|
1102 | if(!smtp)
|
---|
1103 | result = CURLE_OUT_OF_MEMORY;
|
---|
1104 |
|
---|
1105 | return result;
|
---|
1106 | }
|
---|
1107 |
|
---|
1108 | /* For the SMTP "protocol connect" and "doing" phases only */
|
---|
1109 | static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
|
---|
1110 | int numsocks)
|
---|
1111 | {
|
---|
1112 | return Curl_pp_getsock(&conn->proto.smtpc.pp, socks, numsocks);
|
---|
1113 | }
|
---|
1114 |
|
---|
1115 | /***********************************************************************
|
---|
1116 | *
|
---|
1117 | * smtp_connect()
|
---|
1118 | *
|
---|
1119 | * This function should do everything that is to be considered a part of
|
---|
1120 | * the connection phase.
|
---|
1121 | *
|
---|
1122 | * The variable pointed to by 'done' will be TRUE if the protocol-layer
|
---|
1123 | * connect phase is done when this function returns, or FALSE if not.
|
---|
1124 | */
|
---|
1125 | static CURLcode smtp_connect(struct connectdata *conn, bool *done)
|
---|
1126 | {
|
---|
1127 | CURLcode result = CURLE_OK;
|
---|
1128 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1129 | struct pingpong *pp = &smtpc->pp;
|
---|
1130 |
|
---|
1131 | *done = FALSE; /* default to not done yet */
|
---|
1132 |
|
---|
1133 | /* We always support persistent connections in SMTP */
|
---|
1134 | connkeep(conn, "SMTP default");
|
---|
1135 |
|
---|
1136 | /* Set the default response time-out */
|
---|
1137 | pp->response_time = RESP_TIMEOUT;
|
---|
1138 | pp->statemach_act = smtp_statemach_act;
|
---|
1139 | pp->endofresp = smtp_endofresp;
|
---|
1140 | pp->conn = conn;
|
---|
1141 |
|
---|
1142 | /* Initialize the SASL storage */
|
---|
1143 | Curl_sasl_init(&smtpc->sasl, &saslsmtp);
|
---|
1144 |
|
---|
1145 | /* Initialise the pingpong layer */
|
---|
1146 | Curl_pp_init(pp);
|
---|
1147 |
|
---|
1148 | /* Parse the URL options */
|
---|
1149 | result = smtp_parse_url_options(conn);
|
---|
1150 | if(result)
|
---|
1151 | return result;
|
---|
1152 |
|
---|
1153 | /* Parse the URL path */
|
---|
1154 | result = smtp_parse_url_path(conn);
|
---|
1155 | if(result)
|
---|
1156 | return result;
|
---|
1157 |
|
---|
1158 | /* Start off waiting for the server greeting response */
|
---|
1159 | state(conn, SMTP_SERVERGREET);
|
---|
1160 |
|
---|
1161 | result = smtp_multi_statemach(conn, done);
|
---|
1162 |
|
---|
1163 | return result;
|
---|
1164 | }
|
---|
1165 |
|
---|
1166 | /***********************************************************************
|
---|
1167 | *
|
---|
1168 | * smtp_done()
|
---|
1169 | *
|
---|
1170 | * The DONE function. This does what needs to be done after a single DO has
|
---|
1171 | * performed.
|
---|
1172 | *
|
---|
1173 | * Input argument is already checked for validity.
|
---|
1174 | */
|
---|
1175 | static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
|
---|
1176 | bool premature)
|
---|
1177 | {
|
---|
1178 | CURLcode result = CURLE_OK;
|
---|
1179 | struct Curl_easy *data = conn->data;
|
---|
1180 | struct SMTP *smtp = data->req.protop;
|
---|
1181 | struct pingpong *pp = &conn->proto.smtpc.pp;
|
---|
1182 | char *eob;
|
---|
1183 | ssize_t len;
|
---|
1184 | ssize_t bytes_written;
|
---|
1185 |
|
---|
1186 | (void)premature;
|
---|
1187 |
|
---|
1188 | if(!smtp || !pp->conn)
|
---|
1189 | return CURLE_OK;
|
---|
1190 |
|
---|
1191 | /* Cleanup our per-request based variables */
|
---|
1192 | Curl_safefree(smtp->custom);
|
---|
1193 |
|
---|
1194 | if(status) {
|
---|
1195 | connclose(conn, "SMTP done with bad status"); /* marked for closure */
|
---|
1196 | result = status; /* use the already set error code */
|
---|
1197 | }
|
---|
1198 | else if(!data->set.connect_only && data->set.mail_rcpt &&
|
---|
1199 | (data->set.upload || data->set.mimepost.kind)) {
|
---|
1200 | /* Calculate the EOB taking into account any terminating CRLF from the
|
---|
1201 | previous line of the email or the CRLF of the DATA command when there
|
---|
1202 | is "no mail data". RFC-5321, sect. 4.1.1.4.
|
---|
1203 |
|
---|
1204 | Note: As some SSL backends, such as OpenSSL, will cause Curl_write() to
|
---|
1205 | fail when using a different pointer following a previous write, that
|
---|
1206 | returned CURLE_AGAIN, we duplicate the EOB now rather than when the
|
---|
1207 | bytes written doesn't equal len. */
|
---|
1208 | if(smtp->trailing_crlf || !conn->data->state.infilesize) {
|
---|
1209 | eob = strdup(SMTP_EOB + 2);
|
---|
1210 | len = SMTP_EOB_LEN - 2;
|
---|
1211 | }
|
---|
1212 | else {
|
---|
1213 | eob = strdup(SMTP_EOB);
|
---|
1214 | len = SMTP_EOB_LEN;
|
---|
1215 | }
|
---|
1216 |
|
---|
1217 | if(!eob)
|
---|
1218 | return CURLE_OUT_OF_MEMORY;
|
---|
1219 |
|
---|
1220 | /* Send the end of block data */
|
---|
1221 | result = Curl_write(conn, conn->writesockfd, eob, len, &bytes_written);
|
---|
1222 | if(result) {
|
---|
1223 | free(eob);
|
---|
1224 | return result;
|
---|
1225 | }
|
---|
1226 |
|
---|
1227 | if(bytes_written != len) {
|
---|
1228 | /* The whole chunk was not sent so keep it around and adjust the
|
---|
1229 | pingpong structure accordingly */
|
---|
1230 | pp->sendthis = eob;
|
---|
1231 | pp->sendsize = len;
|
---|
1232 | pp->sendleft = len - bytes_written;
|
---|
1233 | }
|
---|
1234 | else {
|
---|
1235 | /* Successfully sent so adjust the response timeout relative to now */
|
---|
1236 | pp->response = Curl_now();
|
---|
1237 |
|
---|
1238 | free(eob);
|
---|
1239 | }
|
---|
1240 |
|
---|
1241 | state(conn, SMTP_POSTDATA);
|
---|
1242 |
|
---|
1243 | /* Run the state-machine
|
---|
1244 |
|
---|
1245 | TODO: when the multi interface is used, this _really_ should be using
|
---|
1246 | the smtp_multi_statemach function but we have no general support for
|
---|
1247 | non-blocking DONE operations!
|
---|
1248 | */
|
---|
1249 | result = smtp_block_statemach(conn);
|
---|
1250 | }
|
---|
1251 |
|
---|
1252 | /* Clear the transfer mode for the next request */
|
---|
1253 | smtp->transfer = FTPTRANSFER_BODY;
|
---|
1254 |
|
---|
1255 | return result;
|
---|
1256 | }
|
---|
1257 |
|
---|
1258 | /***********************************************************************
|
---|
1259 | *
|
---|
1260 | * smtp_perform()
|
---|
1261 | *
|
---|
1262 | * This is the actual DO function for SMTP. Transfer a mail, send a command
|
---|
1263 | * or get some data according to the options previously setup.
|
---|
1264 | */
|
---|
1265 | static CURLcode smtp_perform(struct connectdata *conn, bool *connected,
|
---|
1266 | bool *dophase_done)
|
---|
1267 | {
|
---|
1268 | /* This is SMTP and no proxy */
|
---|
1269 | CURLcode result = CURLE_OK;
|
---|
1270 | struct Curl_easy *data = conn->data;
|
---|
1271 | struct SMTP *smtp = data->req.protop;
|
---|
1272 |
|
---|
1273 | DEBUGF(infof(conn->data, "DO phase starts\n"));
|
---|
1274 |
|
---|
1275 | if(data->set.opt_no_body) {
|
---|
1276 | /* Requested no body means no transfer */
|
---|
1277 | smtp->transfer = FTPTRANSFER_INFO;
|
---|
1278 | }
|
---|
1279 |
|
---|
1280 | *dophase_done = FALSE; /* not done yet */
|
---|
1281 |
|
---|
1282 | /* Store the first recipient (or NULL if not specified) */
|
---|
1283 | smtp->rcpt = data->set.mail_rcpt;
|
---|
1284 |
|
---|
1285 | /* Start the first command in the DO phase */
|
---|
1286 | if((data->set.upload || data->set.mimepost.kind) && data->set.mail_rcpt)
|
---|
1287 | /* MAIL transfer */
|
---|
1288 | result = smtp_perform_mail(conn);
|
---|
1289 | else
|
---|
1290 | /* SMTP based command (VRFY, EXPN, NOOP, RSET or HELP) */
|
---|
1291 | result = smtp_perform_command(conn);
|
---|
1292 |
|
---|
1293 | if(result)
|
---|
1294 | return result;
|
---|
1295 |
|
---|
1296 | /* Run the state-machine */
|
---|
1297 | result = smtp_multi_statemach(conn, dophase_done);
|
---|
1298 |
|
---|
1299 | *connected = conn->bits.tcpconnect[FIRSTSOCKET];
|
---|
1300 |
|
---|
1301 | if(*dophase_done)
|
---|
1302 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
1303 |
|
---|
1304 | return result;
|
---|
1305 | }
|
---|
1306 |
|
---|
1307 | /***********************************************************************
|
---|
1308 | *
|
---|
1309 | * smtp_do()
|
---|
1310 | *
|
---|
1311 | * This function is registered as 'curl_do' function. It decodes the path
|
---|
1312 | * parts etc as a wrapper to the actual DO function (smtp_perform).
|
---|
1313 | *
|
---|
1314 | * The input argument is already checked for validity.
|
---|
1315 | */
|
---|
1316 | static CURLcode smtp_do(struct connectdata *conn, bool *done)
|
---|
1317 | {
|
---|
1318 | CURLcode result = CURLE_OK;
|
---|
1319 |
|
---|
1320 | *done = FALSE; /* default to false */
|
---|
1321 |
|
---|
1322 | /* Parse the custom request */
|
---|
1323 | result = smtp_parse_custom_request(conn);
|
---|
1324 | if(result)
|
---|
1325 | return result;
|
---|
1326 |
|
---|
1327 | result = smtp_regular_transfer(conn, done);
|
---|
1328 |
|
---|
1329 | return result;
|
---|
1330 | }
|
---|
1331 |
|
---|
1332 | /***********************************************************************
|
---|
1333 | *
|
---|
1334 | * smtp_disconnect()
|
---|
1335 | *
|
---|
1336 | * Disconnect from an SMTP server. Cleanup protocol-specific per-connection
|
---|
1337 | * resources. BLOCKING.
|
---|
1338 | */
|
---|
1339 | static CURLcode smtp_disconnect(struct connectdata *conn, bool dead_connection)
|
---|
1340 | {
|
---|
1341 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1342 |
|
---|
1343 | /* We cannot send quit unconditionally. If this connection is stale or
|
---|
1344 | bad in any way, sending quit and waiting around here will make the
|
---|
1345 | disconnect wait in vain and cause more problems than we need to. */
|
---|
1346 |
|
---|
1347 | /* The SMTP session may or may not have been allocated/setup at this
|
---|
1348 | point! */
|
---|
1349 | if(!dead_connection && smtpc->pp.conn && smtpc->pp.conn->bits.protoconnstart)
|
---|
1350 | if(!smtp_perform_quit(conn))
|
---|
1351 | (void)smtp_block_statemach(conn); /* ignore errors on QUIT */
|
---|
1352 |
|
---|
1353 | /* Disconnect from the server */
|
---|
1354 | Curl_pp_disconnect(&smtpc->pp);
|
---|
1355 |
|
---|
1356 | /* Cleanup the SASL module */
|
---|
1357 | Curl_sasl_cleanup(conn, smtpc->sasl.authused);
|
---|
1358 |
|
---|
1359 | /* Cleanup our connection based variables */
|
---|
1360 | Curl_safefree(smtpc->domain);
|
---|
1361 |
|
---|
1362 | return CURLE_OK;
|
---|
1363 | }
|
---|
1364 |
|
---|
1365 | /* Call this when the DO phase has completed */
|
---|
1366 | static CURLcode smtp_dophase_done(struct connectdata *conn, bool connected)
|
---|
1367 | {
|
---|
1368 | struct SMTP *smtp = conn->data->req.protop;
|
---|
1369 |
|
---|
1370 | (void)connected;
|
---|
1371 |
|
---|
1372 | if(smtp->transfer != FTPTRANSFER_BODY)
|
---|
1373 | /* no data to transfer */
|
---|
1374 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
1375 |
|
---|
1376 | return CURLE_OK;
|
---|
1377 | }
|
---|
1378 |
|
---|
1379 | /* Called from multi.c while DOing */
|
---|
1380 | static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done)
|
---|
1381 | {
|
---|
1382 | CURLcode result = smtp_multi_statemach(conn, dophase_done);
|
---|
1383 |
|
---|
1384 | if(result)
|
---|
1385 | DEBUGF(infof(conn->data, "DO phase failed\n"));
|
---|
1386 | else if(*dophase_done) {
|
---|
1387 | result = smtp_dophase_done(conn, FALSE /* not connected */);
|
---|
1388 |
|
---|
1389 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
1390 | }
|
---|
1391 |
|
---|
1392 | return result;
|
---|
1393 | }
|
---|
1394 |
|
---|
1395 | /***********************************************************************
|
---|
1396 | *
|
---|
1397 | * smtp_regular_transfer()
|
---|
1398 | *
|
---|
1399 | * The input argument is already checked for validity.
|
---|
1400 | *
|
---|
1401 | * Performs all commands done before a regular transfer between a local and a
|
---|
1402 | * remote host.
|
---|
1403 | */
|
---|
1404 | static CURLcode smtp_regular_transfer(struct connectdata *conn,
|
---|
1405 | bool *dophase_done)
|
---|
1406 | {
|
---|
1407 | CURLcode result = CURLE_OK;
|
---|
1408 | bool connected = FALSE;
|
---|
1409 | struct Curl_easy *data = conn->data;
|
---|
1410 |
|
---|
1411 | /* Make sure size is unknown at this point */
|
---|
1412 | data->req.size = -1;
|
---|
1413 |
|
---|
1414 | /* Set the progress data */
|
---|
1415 | Curl_pgrsSetUploadCounter(data, 0);
|
---|
1416 | Curl_pgrsSetDownloadCounter(data, 0);
|
---|
1417 | Curl_pgrsSetUploadSize(data, -1);
|
---|
1418 | Curl_pgrsSetDownloadSize(data, -1);
|
---|
1419 |
|
---|
1420 | /* Carry out the perform */
|
---|
1421 | result = smtp_perform(conn, &connected, dophase_done);
|
---|
1422 |
|
---|
1423 | /* Perform post DO phase operations if necessary */
|
---|
1424 | if(!result && *dophase_done)
|
---|
1425 | result = smtp_dophase_done(conn, connected);
|
---|
1426 |
|
---|
1427 | return result;
|
---|
1428 | }
|
---|
1429 |
|
---|
1430 | static CURLcode smtp_setup_connection(struct connectdata *conn)
|
---|
1431 | {
|
---|
1432 | struct Curl_easy *data = conn->data;
|
---|
1433 | CURLcode result;
|
---|
1434 |
|
---|
1435 | /* Clear the TLS upgraded flag */
|
---|
1436 | conn->tls_upgraded = FALSE;
|
---|
1437 |
|
---|
1438 | /* Initialise the SMTP layer */
|
---|
1439 | result = smtp_init(conn);
|
---|
1440 | if(result)
|
---|
1441 | return result;
|
---|
1442 |
|
---|
1443 | data->state.path++; /* don't include the initial slash */
|
---|
1444 |
|
---|
1445 | return CURLE_OK;
|
---|
1446 | }
|
---|
1447 |
|
---|
1448 | /***********************************************************************
|
---|
1449 | *
|
---|
1450 | * smtp_parse_url_options()
|
---|
1451 | *
|
---|
1452 | * Parse the URL login options.
|
---|
1453 | */
|
---|
1454 | static CURLcode smtp_parse_url_options(struct connectdata *conn)
|
---|
1455 | {
|
---|
1456 | CURLcode result = CURLE_OK;
|
---|
1457 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1458 | const char *ptr = conn->options;
|
---|
1459 |
|
---|
1460 | smtpc->sasl.resetprefs = TRUE;
|
---|
1461 |
|
---|
1462 | while(!result && ptr && *ptr) {
|
---|
1463 | const char *key = ptr;
|
---|
1464 | const char *value;
|
---|
1465 |
|
---|
1466 | while(*ptr && *ptr != '=')
|
---|
1467 | ptr++;
|
---|
1468 |
|
---|
1469 | value = ptr + 1;
|
---|
1470 |
|
---|
1471 | while(*ptr && *ptr != ';')
|
---|
1472 | ptr++;
|
---|
1473 |
|
---|
1474 | if(strncasecompare(key, "AUTH=", 5))
|
---|
1475 | result = Curl_sasl_parse_url_auth_option(&smtpc->sasl,
|
---|
1476 | value, ptr - value);
|
---|
1477 | else
|
---|
1478 | result = CURLE_URL_MALFORMAT;
|
---|
1479 |
|
---|
1480 | if(*ptr == ';')
|
---|
1481 | ptr++;
|
---|
1482 | }
|
---|
1483 |
|
---|
1484 | return result;
|
---|
1485 | }
|
---|
1486 |
|
---|
1487 | /***********************************************************************
|
---|
1488 | *
|
---|
1489 | * smtp_parse_url_path()
|
---|
1490 | *
|
---|
1491 | * Parse the URL path into separate path components.
|
---|
1492 | */
|
---|
1493 | static CURLcode smtp_parse_url_path(struct connectdata *conn)
|
---|
1494 | {
|
---|
1495 | /* The SMTP struct is already initialised in smtp_connect() */
|
---|
1496 | struct Curl_easy *data = conn->data;
|
---|
1497 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1498 | const char *path = data->state.path;
|
---|
1499 | char localhost[HOSTNAME_MAX + 1];
|
---|
1500 |
|
---|
1501 | /* Calculate the path if necessary */
|
---|
1502 | if(!*path) {
|
---|
1503 | if(!Curl_gethostname(localhost, sizeof(localhost)))
|
---|
1504 | path = localhost;
|
---|
1505 | else
|
---|
1506 | path = "localhost";
|
---|
1507 | }
|
---|
1508 |
|
---|
1509 | /* URL decode the path and use it as the domain in our EHLO */
|
---|
1510 | return Curl_urldecode(conn->data, path, 0, &smtpc->domain, NULL, TRUE);
|
---|
1511 | }
|
---|
1512 |
|
---|
1513 | /***********************************************************************
|
---|
1514 | *
|
---|
1515 | * smtp_parse_custom_request()
|
---|
1516 | *
|
---|
1517 | * Parse the custom request.
|
---|
1518 | */
|
---|
1519 | static CURLcode smtp_parse_custom_request(struct connectdata *conn)
|
---|
1520 | {
|
---|
1521 | CURLcode result = CURLE_OK;
|
---|
1522 | struct Curl_easy *data = conn->data;
|
---|
1523 | struct SMTP *smtp = data->req.protop;
|
---|
1524 | const char *custom = data->set.str[STRING_CUSTOMREQUEST];
|
---|
1525 |
|
---|
1526 | /* URL decode the custom request */
|
---|
1527 | if(custom)
|
---|
1528 | result = Curl_urldecode(data, custom, 0, &smtp->custom, NULL, TRUE);
|
---|
1529 |
|
---|
1530 | return result;
|
---|
1531 | }
|
---|
1532 |
|
---|
1533 | CURLcode Curl_smtp_escape_eob(struct connectdata *conn, const ssize_t nread)
|
---|
1534 | {
|
---|
1535 | /* When sending a SMTP payload we must detect CRLF. sequences making sure
|
---|
1536 | they are sent as CRLF.. instead, as a . on the beginning of a line will
|
---|
1537 | be deleted by the server when not part of an EOB terminator and a
|
---|
1538 | genuine CRLF.CRLF which isn't escaped will wrongly be detected as end of
|
---|
1539 | data by the server
|
---|
1540 | */
|
---|
1541 | ssize_t i;
|
---|
1542 | ssize_t si;
|
---|
1543 | struct Curl_easy *data = conn->data;
|
---|
1544 | struct SMTP *smtp = data->req.protop;
|
---|
1545 | char *scratch = data->state.scratch;
|
---|
1546 | char *newscratch = NULL;
|
---|
1547 | char *oldscratch = NULL;
|
---|
1548 | size_t eob_sent;
|
---|
1549 |
|
---|
1550 | /* Do we need to allocate a scratch buffer? */
|
---|
1551 | if(!scratch || data->set.crlf) {
|
---|
1552 | oldscratch = scratch;
|
---|
1553 |
|
---|
1554 | scratch = newscratch = malloc(2 * data->set.buffer_size);
|
---|
1555 | if(!newscratch) {
|
---|
1556 | failf(data, "Failed to alloc scratch buffer!");
|
---|
1557 |
|
---|
1558 | return CURLE_OUT_OF_MEMORY;
|
---|
1559 | }
|
---|
1560 | }
|
---|
1561 |
|
---|
1562 | /* Have we already sent part of the EOB? */
|
---|
1563 | eob_sent = smtp->eob;
|
---|
1564 |
|
---|
1565 | /* This loop can be improved by some kind of Boyer-Moore style of
|
---|
1566 | approach but that is saved for later... */
|
---|
1567 | for(i = 0, si = 0; i < nread; i++) {
|
---|
1568 | if(SMTP_EOB[smtp->eob] == data->req.upload_fromhere[i]) {
|
---|
1569 | smtp->eob++;
|
---|
1570 |
|
---|
1571 | /* Is the EOB potentially the terminating CRLF? */
|
---|
1572 | if(2 == smtp->eob || SMTP_EOB_LEN == smtp->eob)
|
---|
1573 | smtp->trailing_crlf = TRUE;
|
---|
1574 | else
|
---|
1575 | smtp->trailing_crlf = FALSE;
|
---|
1576 | }
|
---|
1577 | else if(smtp->eob) {
|
---|
1578 | /* A previous substring matched so output that first */
|
---|
1579 | memcpy(&scratch[si], &SMTP_EOB[eob_sent], smtp->eob - eob_sent);
|
---|
1580 | si += smtp->eob - eob_sent;
|
---|
1581 |
|
---|
1582 | /* Then compare the first byte */
|
---|
1583 | if(SMTP_EOB[0] == data->req.upload_fromhere[i])
|
---|
1584 | smtp->eob = 1;
|
---|
1585 | else
|
---|
1586 | smtp->eob = 0;
|
---|
1587 |
|
---|
1588 | eob_sent = 0;
|
---|
1589 |
|
---|
1590 | /* Reset the trailing CRLF flag as there was more data */
|
---|
1591 | smtp->trailing_crlf = FALSE;
|
---|
1592 | }
|
---|
1593 |
|
---|
1594 | /* Do we have a match for CRLF. as per RFC-5321, sect. 4.5.2 */
|
---|
1595 | if(SMTP_EOB_FIND_LEN == smtp->eob) {
|
---|
1596 | /* Copy the replacement data to the target buffer */
|
---|
1597 | memcpy(&scratch[si], &SMTP_EOB_REPL[eob_sent],
|
---|
1598 | SMTP_EOB_REPL_LEN - eob_sent);
|
---|
1599 | si += SMTP_EOB_REPL_LEN - eob_sent;
|
---|
1600 | smtp->eob = 0;
|
---|
1601 | eob_sent = 0;
|
---|
1602 | }
|
---|
1603 | else if(!smtp->eob)
|
---|
1604 | scratch[si++] = data->req.upload_fromhere[i];
|
---|
1605 | }
|
---|
1606 |
|
---|
1607 | if(smtp->eob - eob_sent) {
|
---|
1608 | /* A substring matched before processing ended so output that now */
|
---|
1609 | memcpy(&scratch[si], &SMTP_EOB[eob_sent], smtp->eob - eob_sent);
|
---|
1610 | si += smtp->eob - eob_sent;
|
---|
1611 | }
|
---|
1612 |
|
---|
1613 | /* Only use the new buffer if we replaced something */
|
---|
1614 | if(si != nread) {
|
---|
1615 | /* Upload from the new (replaced) buffer instead */
|
---|
1616 | data->req.upload_fromhere = scratch;
|
---|
1617 |
|
---|
1618 | /* Save the buffer so it can be freed later */
|
---|
1619 | data->state.scratch = scratch;
|
---|
1620 |
|
---|
1621 | /* Free the old scratch buffer */
|
---|
1622 | free(oldscratch);
|
---|
1623 |
|
---|
1624 | /* Set the new amount too */
|
---|
1625 | data->req.upload_present = si;
|
---|
1626 | }
|
---|
1627 | else
|
---|
1628 | free(newscratch);
|
---|
1629 |
|
---|
1630 | return CURLE_OK;
|
---|
1631 | }
|
---|
1632 |
|
---|
1633 | #endif /* CURL_DISABLE_SMTP */
|
---|