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 | * 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 "socks.h"
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71 | #include "smtp.h"
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72 |
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73 | #include "strtoofft.h"
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74 | #include "strequal.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 "rawstr.h"
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82 | #include "curl_gethostname.h"
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83 | #include "curl_sasl.h"
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84 | #include "warnless.h"
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85 | #include "curl_printf.h"
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86 | #include "curl_memory.h"
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87 | /* The last #include file should be: */
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88 | #include "memdebug.h"
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89 |
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90 | /* Local API functions */
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91 | static CURLcode smtp_regular_transfer(struct connectdata *conn, bool *done);
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92 | static CURLcode smtp_do(struct connectdata *conn, bool *done);
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93 | static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
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94 | bool premature);
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95 | static CURLcode smtp_connect(struct connectdata *conn, bool *done);
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96 | static CURLcode smtp_disconnect(struct connectdata *conn, bool dead);
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97 | static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done);
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98 | static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
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99 | int numsocks);
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100 | static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done);
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101 | static CURLcode smtp_setup_connection(struct connectdata *conn);
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102 | static CURLcode smtp_parse_url_options(struct connectdata *conn);
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103 | static CURLcode smtp_parse_url_path(struct connectdata *conn);
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104 | static CURLcode smtp_parse_custom_request(struct connectdata *conn);
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105 | static CURLcode smtp_perform_auth(struct connectdata *conn, const char *mech,
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106 | const char *initresp);
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107 | static CURLcode smtp_continue_auth(struct connectdata *conn, const char *resp);
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108 | static void smtp_get_message(char *buffer, char** outptr);
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109 |
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110 | /*
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111 | * SMTP protocol handler.
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112 | */
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113 |
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114 | const struct Curl_handler Curl_handler_smtp = {
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115 | "SMTP", /* scheme */
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116 | smtp_setup_connection, /* setup_connection */
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117 | smtp_do, /* do_it */
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118 | smtp_done, /* done */
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119 | ZERO_NULL, /* do_more */
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120 | smtp_connect, /* connect_it */
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121 | smtp_multi_statemach, /* connecting */
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122 | smtp_doing, /* doing */
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123 | smtp_getsock, /* proto_getsock */
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124 | smtp_getsock, /* doing_getsock */
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125 | ZERO_NULL, /* domore_getsock */
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126 | ZERO_NULL, /* perform_getsock */
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127 | smtp_disconnect, /* disconnect */
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128 | ZERO_NULL, /* readwrite */
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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 | };
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133 |
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134 | #ifdef USE_SSL
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135 | /*
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136 | * SMTPS protocol handler.
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137 | */
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138 |
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139 | const struct Curl_handler Curl_handler_smtps = {
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140 | "SMTPS", /* scheme */
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141 | smtp_setup_connection, /* setup_connection */
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142 | smtp_do, /* do_it */
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143 | smtp_done, /* done */
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144 | ZERO_NULL, /* do_more */
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145 | smtp_connect, /* connect_it */
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146 | smtp_multi_statemach, /* connecting */
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147 | smtp_doing, /* doing */
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148 | smtp_getsock, /* proto_getsock */
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149 | smtp_getsock, /* doing_getsock */
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150 | ZERO_NULL, /* domore_getsock */
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151 | ZERO_NULL, /* perform_getsock */
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152 | smtp_disconnect, /* disconnect */
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153 | ZERO_NULL, /* readwrite */
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154 | PORT_SMTPS, /* defport */
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155 | CURLPROTO_SMTPS, /* protocol */
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156 | PROTOPT_CLOSEACTION | PROTOPT_SSL
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157 | | PROTOPT_NOURLQUERY /* flags */
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158 | };
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159 | #endif
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160 |
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161 | #ifndef CURL_DISABLE_HTTP
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162 | /*
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163 | * HTTP-proxyed SMTP protocol handler.
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164 | */
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165 |
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166 | static const struct Curl_handler Curl_handler_smtp_proxy = {
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167 | "SMTP", /* scheme */
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168 | Curl_http_setup_conn, /* setup_connection */
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169 | Curl_http, /* do_it */
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170 | Curl_http_done, /* done */
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171 | ZERO_NULL, /* do_more */
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172 | ZERO_NULL, /* connect_it */
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173 | ZERO_NULL, /* connecting */
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174 | ZERO_NULL, /* doing */
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175 | ZERO_NULL, /* proto_getsock */
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176 | ZERO_NULL, /* doing_getsock */
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177 | ZERO_NULL, /* domore_getsock */
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178 | ZERO_NULL, /* perform_getsock */
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179 | ZERO_NULL, /* disconnect */
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180 | ZERO_NULL, /* readwrite */
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181 | PORT_SMTP, /* defport */
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182 | CURLPROTO_HTTP, /* protocol */
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183 | PROTOPT_NONE /* flags */
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184 | };
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185 |
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186 | #ifdef USE_SSL
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187 | /*
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188 | * HTTP-proxyed SMTPS protocol handler.
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189 | */
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190 |
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191 | static const struct Curl_handler Curl_handler_smtps_proxy = {
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192 | "SMTPS", /* scheme */
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193 | Curl_http_setup_conn, /* setup_connection */
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194 | Curl_http, /* do_it */
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195 | Curl_http_done, /* done */
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196 | ZERO_NULL, /* do_more */
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197 | ZERO_NULL, /* connect_it */
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198 | ZERO_NULL, /* connecting */
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199 | ZERO_NULL, /* doing */
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200 | ZERO_NULL, /* proto_getsock */
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201 | ZERO_NULL, /* doing_getsock */
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202 | ZERO_NULL, /* domore_getsock */
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203 | ZERO_NULL, /* perform_getsock */
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204 | ZERO_NULL, /* disconnect */
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205 | ZERO_NULL, /* readwrite */
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206 | PORT_SMTPS, /* defport */
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207 | CURLPROTO_HTTP, /* protocol */
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208 | PROTOPT_NONE /* flags */
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209 | };
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210 | #endif
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211 | #endif
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212 |
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213 | /* SASL parameters for the smtp protocol */
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214 | static const struct SASLproto saslsmtp = {
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215 | "smtp", /* The service name */
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216 | 334, /* Code received when continuation is expected */
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217 | 235, /* Code to receive upon authentication success */
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218 | 512 - 8, /* Maximum initial response length (no max) */
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219 | smtp_perform_auth, /* Send authentication command */
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220 | smtp_continue_auth, /* Send authentication continuation */
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221 | smtp_get_message /* Get SASL response message */
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222 | };
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223 |
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224 | #ifdef USE_SSL
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225 | static void smtp_to_smtps(struct connectdata *conn)
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226 | {
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227 | conn->handler = &Curl_handler_smtps;
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228 | }
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229 | #else
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230 | #define smtp_to_smtps(x) Curl_nop_stmt
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231 | #endif
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232 |
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233 | /***********************************************************************
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234 | *
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235 | * smtp_endofresp()
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236 | *
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237 | * Checks for an ending SMTP status code at the start of the given string, but
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238 | * also detects various capabilities from the EHLO response including the
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239 | * supported authentication mechanisms.
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240 | */
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241 | static bool smtp_endofresp(struct connectdata *conn, char *line, size_t len,
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242 | int *resp)
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243 | {
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244 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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245 | bool result = FALSE;
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246 |
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247 | /* Nothing for us */
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248 | if(len < 4 || !ISDIGIT(line[0]) || !ISDIGIT(line[1]) || !ISDIGIT(line[2]))
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249 | return FALSE;
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250 |
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251 | /* Do we have a command response? This should be the response code followed
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252 | by a space and optionally some text as per RFC-5321 and as outlined in
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253 | Section 4. Examples of RFC-4954 but some e-mail servers ignore this and
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254 | only send the response code instead as per Section 4.2. */
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255 | if(line[3] == ' ' || len == 5) {
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256 | result = TRUE;
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257 | *resp = curlx_sltosi(strtol(line, NULL, 10));
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258 |
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259 | /* Make sure real server never sends internal value */
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260 | if(*resp == 1)
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261 | *resp = 0;
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262 | }
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263 | /* Do we have a multiline (continuation) response? */
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264 | else if(line[3] == '-' &&
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265 | (smtpc->state == SMTP_EHLO || smtpc->state == SMTP_COMMAND)) {
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266 | result = TRUE;
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267 | *resp = 1; /* Internal response code */
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268 | }
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269 |
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270 | return result;
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271 | }
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272 |
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273 | /***********************************************************************
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274 | *
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275 | * smtp_get_message()
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276 | *
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277 | * Gets the authentication message from the response buffer.
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278 | */
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279 | static void smtp_get_message(char *buffer, char** outptr)
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280 | {
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281 | size_t len = 0;
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282 | char* message = NULL;
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283 |
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284 | /* Find the start of the message */
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285 | for(message = buffer + 4; *message == ' ' || *message == '\t'; message++)
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286 | ;
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287 |
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288 | /* Find the end of the message */
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289 | for(len = strlen(message); len--;)
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290 | if(message[len] != '\r' && message[len] != '\n' && message[len] != ' ' &&
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291 | message[len] != '\t')
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292 | break;
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293 |
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294 | /* Terminate the message */
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295 | if(++len) {
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296 | message[len] = '\0';
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297 | }
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298 |
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299 | *outptr = message;
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300 | }
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301 |
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302 | /***********************************************************************
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303 | *
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304 | * state()
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305 | *
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306 | * This is the ONLY way to change SMTP state!
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307 | */
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308 | static void state(struct connectdata *conn, smtpstate newstate)
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309 | {
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310 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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311 | #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
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312 | /* for debug purposes */
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313 | static const char * const names[] = {
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314 | "STOP",
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315 | "SERVERGREET",
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316 | "EHLO",
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317 | "HELO",
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318 | "STARTTLS",
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319 | "UPGRADETLS",
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320 | "AUTH",
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321 | "COMMAND",
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322 | "MAIL",
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323 | "RCPT",
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324 | "DATA",
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325 | "POSTDATA",
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326 | "QUIT",
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327 | /* LAST */
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328 | };
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329 |
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330 | if(smtpc->state != newstate)
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331 | infof(conn->data, "SMTP %p state change from %s to %s\n",
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332 | (void *)smtpc, names[smtpc->state], names[newstate]);
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333 | #endif
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334 |
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335 | smtpc->state = newstate;
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336 | }
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337 |
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338 | /***********************************************************************
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339 | *
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340 | * smtp_perform_ehlo()
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341 | *
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342 | * Sends the EHLO command to not only initialise communication with the ESMTP
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343 | * server but to also obtain a list of server side supported capabilities.
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344 | */
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345 | static CURLcode smtp_perform_ehlo(struct connectdata *conn)
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346 | {
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347 | CURLcode result = CURLE_OK;
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348 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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349 |
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350 | smtpc->sasl.authmechs = SASL_AUTH_NONE; /* No known auth. mechanism yet */
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351 | smtpc->sasl.authused = SASL_AUTH_NONE; /* Clear the authentication mechanism
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352 | used for esmtp connections */
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353 | smtpc->tls_supported = FALSE; /* Clear the TLS capability */
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354 | smtpc->auth_supported = FALSE; /* Clear the AUTH capability */
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355 |
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356 | /* Send the EHLO command */
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357 | result = Curl_pp_sendf(&smtpc->pp, "EHLO %s", smtpc->domain);
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358 |
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359 | if(!result)
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360 | state(conn, SMTP_EHLO);
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361 |
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362 | return result;
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363 | }
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364 |
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365 | /***********************************************************************
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366 | *
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367 | * smtp_perform_helo()
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368 | *
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369 | * Sends the HELO command to initialise communication with the SMTP server.
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370 | */
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371 | static CURLcode smtp_perform_helo(struct connectdata *conn)
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372 | {
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373 | CURLcode result = CURLE_OK;
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374 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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375 |
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376 | smtpc->sasl.authused = SASL_AUTH_NONE; /* No authentication mechanism used
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377 | in smtp connections */
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378 |
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379 | /* Send the HELO command */
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380 | result = Curl_pp_sendf(&smtpc->pp, "HELO %s", smtpc->domain);
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381 |
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382 | if(!result)
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383 | state(conn, SMTP_HELO);
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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_starttls()
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391 | *
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392 | * Sends the STLS command to start the upgrade to TLS.
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393 | */
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394 | static CURLcode smtp_perform_starttls(struct connectdata *conn)
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395 | {
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396 | CURLcode result = CURLE_OK;
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397 |
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398 | /* Send the STARTTLS command */
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399 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "STARTTLS");
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400 |
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401 | if(!result)
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402 | state(conn, SMTP_STARTTLS);
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403 |
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404 | return result;
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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 | * smtp_perform_upgrade_tls()
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410 | *
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411 | * Performs the upgrade to TLS.
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412 | */
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413 | static CURLcode smtp_perform_upgrade_tls(struct connectdata *conn)
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414 | {
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415 | CURLcode result = CURLE_OK;
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416 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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417 |
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418 | /* Start the SSL connection */
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419 | result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
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420 |
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421 | if(!result) {
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422 | if(smtpc->state != SMTP_UPGRADETLS)
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423 | state(conn, SMTP_UPGRADETLS);
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424 |
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425 | if(smtpc->ssldone) {
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426 | smtp_to_smtps(conn);
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427 | result = smtp_perform_ehlo(conn);
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428 | }
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429 | }
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430 |
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431 | return result;
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432 | }
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433 |
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434 | /***********************************************************************
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435 | *
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436 | * smtp_perform_auth()
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437 | *
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438 | * Sends an AUTH command allowing the client to login with the given SASL
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439 | * authentication mechanism.
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440 | */
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441 | static CURLcode smtp_perform_auth(struct connectdata *conn,
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442 | const char *mech,
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443 | const char *initresp)
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444 | {
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445 | CURLcode result = CURLE_OK;
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446 | struct smtp_conn *smtpc = &conn->proto.smtpc;
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447 |
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448 | if(initresp) { /* AUTH <mech> ...<crlf> */
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449 | /* Send the AUTH command with the initial response */
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450 | result = Curl_pp_sendf(&smtpc->pp, "AUTH %s %s", mech, initresp);
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451 | }
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452 | else {
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453 | /* Send the AUTH command */
|
---|
454 | result = Curl_pp_sendf(&smtpc->pp, "AUTH %s", mech);
|
---|
455 | }
|
---|
456 |
|
---|
457 | return result;
|
---|
458 | }
|
---|
459 |
|
---|
460 | /***********************************************************************
|
---|
461 | *
|
---|
462 | * smtp_continue_auth()
|
---|
463 | *
|
---|
464 | * Sends SASL continuation data or cancellation.
|
---|
465 | */
|
---|
466 | static CURLcode smtp_continue_auth(struct connectdata *conn, const char *resp)
|
---|
467 | {
|
---|
468 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
469 |
|
---|
470 | return Curl_pp_sendf(&smtpc->pp, "%s", resp);
|
---|
471 | }
|
---|
472 |
|
---|
473 | /***********************************************************************
|
---|
474 | *
|
---|
475 | * smtp_perform_authentication()
|
---|
476 | *
|
---|
477 | * Initiates the authentication sequence, with the appropriate SASL
|
---|
478 | * authentication mechanism.
|
---|
479 | */
|
---|
480 | static CURLcode smtp_perform_authentication(struct connectdata *conn)
|
---|
481 | {
|
---|
482 | CURLcode result = CURLE_OK;
|
---|
483 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
484 | saslprogress progress;
|
---|
485 |
|
---|
486 | /* Check we have enough data to authenticate with, and the
|
---|
487 | server supports authentiation, and end the connect phase if not */
|
---|
488 | if(!smtpc->auth_supported ||
|
---|
489 | !Curl_sasl_can_authenticate(&smtpc->sasl, conn)) {
|
---|
490 | state(conn, SMTP_STOP);
|
---|
491 | return result;
|
---|
492 | }
|
---|
493 |
|
---|
494 | /* Calculate the SASL login details */
|
---|
495 | result = Curl_sasl_start(&smtpc->sasl, conn, FALSE, &progress);
|
---|
496 |
|
---|
497 | if(!result) {
|
---|
498 | if(progress == SASL_INPROGRESS)
|
---|
499 | state(conn, SMTP_AUTH);
|
---|
500 | else {
|
---|
501 | /* Other mechanisms not supported */
|
---|
502 | infof(conn->data, "No known authentication mechanisms supported!\n");
|
---|
503 | result = CURLE_LOGIN_DENIED;
|
---|
504 | }
|
---|
505 | }
|
---|
506 |
|
---|
507 | return result;
|
---|
508 | }
|
---|
509 |
|
---|
510 | /***********************************************************************
|
---|
511 | *
|
---|
512 | * smtp_perform_command()
|
---|
513 | *
|
---|
514 | * Sends a SMTP based command.
|
---|
515 | */
|
---|
516 | static CURLcode smtp_perform_command(struct connectdata *conn)
|
---|
517 | {
|
---|
518 | CURLcode result = CURLE_OK;
|
---|
519 | struct SessionHandle *data = conn->data;
|
---|
520 | struct SMTP *smtp = data->req.protop;
|
---|
521 |
|
---|
522 | /* Send the command */
|
---|
523 | if(smtp->rcpt)
|
---|
524 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s %s",
|
---|
525 | smtp->custom && smtp->custom[0] != '\0' ?
|
---|
526 | smtp->custom : "VRFY",
|
---|
527 | smtp->rcpt->data);
|
---|
528 | else
|
---|
529 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s",
|
---|
530 | smtp->custom && smtp->custom[0] != '\0' ?
|
---|
531 | smtp->custom : "HELP");
|
---|
532 |
|
---|
533 | if(!result)
|
---|
534 | state(conn, SMTP_COMMAND);
|
---|
535 |
|
---|
536 | return result;
|
---|
537 | }
|
---|
538 |
|
---|
539 | /***********************************************************************
|
---|
540 | *
|
---|
541 | * smtp_perform_mail()
|
---|
542 | *
|
---|
543 | * Sends an MAIL command to initiate the upload of a message.
|
---|
544 | */
|
---|
545 | static CURLcode smtp_perform_mail(struct connectdata *conn)
|
---|
546 | {
|
---|
547 | char *from = NULL;
|
---|
548 | char *auth = NULL;
|
---|
549 | char *size = NULL;
|
---|
550 | CURLcode result = CURLE_OK;
|
---|
551 | struct SessionHandle *data = conn->data;
|
---|
552 |
|
---|
553 | /* Calculate the FROM parameter */
|
---|
554 | if(!data->set.str[STRING_MAIL_FROM])
|
---|
555 | /* Null reverse-path, RFC-5321, sect. 3.6.3 */
|
---|
556 | from = strdup("<>");
|
---|
557 | else if(data->set.str[STRING_MAIL_FROM][0] == '<')
|
---|
558 | from = aprintf("%s", data->set.str[STRING_MAIL_FROM]);
|
---|
559 | else
|
---|
560 | from = aprintf("<%s>", data->set.str[STRING_MAIL_FROM]);
|
---|
561 |
|
---|
562 | if(!from)
|
---|
563 | return CURLE_OUT_OF_MEMORY;
|
---|
564 |
|
---|
565 | /* Calculate the optional AUTH parameter */
|
---|
566 | if(data->set.str[STRING_MAIL_AUTH] && conn->proto.smtpc.sasl.authused) {
|
---|
567 | if(data->set.str[STRING_MAIL_AUTH][0] != '\0')
|
---|
568 | auth = aprintf("%s", data->set.str[STRING_MAIL_AUTH]);
|
---|
569 | else
|
---|
570 | /* Empty AUTH, RFC-2554, sect. 5 */
|
---|
571 | auth = strdup("<>");
|
---|
572 |
|
---|
573 | if(!auth) {
|
---|
574 | free(from);
|
---|
575 |
|
---|
576 | return CURLE_OUT_OF_MEMORY;
|
---|
577 | }
|
---|
578 | }
|
---|
579 |
|
---|
580 | /* Calculate the optional SIZE parameter */
|
---|
581 | if(conn->proto.smtpc.size_supported && conn->data->state.infilesize > 0) {
|
---|
582 | size = aprintf("%" CURL_FORMAT_CURL_OFF_T, data->state.infilesize);
|
---|
583 |
|
---|
584 | if(!size) {
|
---|
585 | free(from);
|
---|
586 | free(auth);
|
---|
587 |
|
---|
588 | return CURLE_OUT_OF_MEMORY;
|
---|
589 | }
|
---|
590 | }
|
---|
591 |
|
---|
592 | /* Send the MAIL command */
|
---|
593 | if(!auth && !size)
|
---|
594 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
595 | "MAIL FROM:%s", from);
|
---|
596 | else if(auth && !size)
|
---|
597 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
598 | "MAIL FROM:%s AUTH=%s", from, auth);
|
---|
599 | else if(auth && size)
|
---|
600 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
601 | "MAIL FROM:%s AUTH=%s SIZE=%s", from, auth, size);
|
---|
602 | else
|
---|
603 | result = Curl_pp_sendf(&conn->proto.smtpc.pp,
|
---|
604 | "MAIL FROM:%s SIZE=%s", from, size);
|
---|
605 |
|
---|
606 | free(from);
|
---|
607 | free(auth);
|
---|
608 | free(size);
|
---|
609 |
|
---|
610 | if(!result)
|
---|
611 | state(conn, SMTP_MAIL);
|
---|
612 |
|
---|
613 | return result;
|
---|
614 | }
|
---|
615 |
|
---|
616 | /***********************************************************************
|
---|
617 | *
|
---|
618 | * smtp_perform_rcpt_to()
|
---|
619 | *
|
---|
620 | * Sends a RCPT TO command for a given recipient as part of the message upload
|
---|
621 | * process.
|
---|
622 | */
|
---|
623 | static CURLcode smtp_perform_rcpt_to(struct connectdata *conn)
|
---|
624 | {
|
---|
625 | CURLcode result = CURLE_OK;
|
---|
626 | struct SessionHandle *data = conn->data;
|
---|
627 | struct SMTP *smtp = data->req.protop;
|
---|
628 |
|
---|
629 | /* Send the RCPT TO command */
|
---|
630 | if(smtp->rcpt->data[0] == '<')
|
---|
631 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:%s",
|
---|
632 | smtp->rcpt->data);
|
---|
633 | else
|
---|
634 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "RCPT TO:<%s>",
|
---|
635 | smtp->rcpt->data);
|
---|
636 | if(!result)
|
---|
637 | state(conn, SMTP_RCPT);
|
---|
638 |
|
---|
639 | return result;
|
---|
640 | }
|
---|
641 |
|
---|
642 | /***********************************************************************
|
---|
643 | *
|
---|
644 | * smtp_perform_quit()
|
---|
645 | *
|
---|
646 | * Performs the quit action prior to sclose() being called.
|
---|
647 | */
|
---|
648 | static CURLcode smtp_perform_quit(struct connectdata *conn)
|
---|
649 | {
|
---|
650 | CURLcode result = CURLE_OK;
|
---|
651 |
|
---|
652 | /* Send the QUIT command */
|
---|
653 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "QUIT");
|
---|
654 |
|
---|
655 | if(!result)
|
---|
656 | state(conn, SMTP_QUIT);
|
---|
657 |
|
---|
658 | return result;
|
---|
659 | }
|
---|
660 |
|
---|
661 | /* For the initial server greeting */
|
---|
662 | static CURLcode smtp_state_servergreet_resp(struct connectdata *conn,
|
---|
663 | int smtpcode,
|
---|
664 | smtpstate instate)
|
---|
665 | {
|
---|
666 | CURLcode result = CURLE_OK;
|
---|
667 | struct SessionHandle *data = conn->data;
|
---|
668 |
|
---|
669 | (void)instate; /* no use for this yet */
|
---|
670 |
|
---|
671 | if(smtpcode/100 != 2) {
|
---|
672 | failf(data, "Got unexpected smtp-server response: %d", smtpcode);
|
---|
673 | result = CURLE_FTP_WEIRD_SERVER_REPLY;
|
---|
674 | }
|
---|
675 | else
|
---|
676 | result = smtp_perform_ehlo(conn);
|
---|
677 |
|
---|
678 | return result;
|
---|
679 | }
|
---|
680 |
|
---|
681 | /* For STARTTLS responses */
|
---|
682 | static CURLcode smtp_state_starttls_resp(struct connectdata *conn,
|
---|
683 | int smtpcode,
|
---|
684 | smtpstate instate)
|
---|
685 | {
|
---|
686 | CURLcode result = CURLE_OK;
|
---|
687 | struct SessionHandle *data = conn->data;
|
---|
688 |
|
---|
689 | (void)instate; /* no use for this yet */
|
---|
690 |
|
---|
691 | if(smtpcode != 220) {
|
---|
692 | if(data->set.use_ssl != CURLUSESSL_TRY) {
|
---|
693 | failf(data, "STARTTLS denied. %c", smtpcode);
|
---|
694 | result = CURLE_USE_SSL_FAILED;
|
---|
695 | }
|
---|
696 | else
|
---|
697 | result = smtp_perform_authentication(conn);
|
---|
698 | }
|
---|
699 | else
|
---|
700 | result = smtp_perform_upgrade_tls(conn);
|
---|
701 |
|
---|
702 | return result;
|
---|
703 | }
|
---|
704 |
|
---|
705 | /* For EHLO responses */
|
---|
706 | static CURLcode smtp_state_ehlo_resp(struct connectdata *conn, int smtpcode,
|
---|
707 | smtpstate instate)
|
---|
708 | {
|
---|
709 | CURLcode result = CURLE_OK;
|
---|
710 | struct SessionHandle *data = conn->data;
|
---|
711 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
712 | const char *line = data->state.buffer;
|
---|
713 | size_t len = strlen(line);
|
---|
714 | size_t wordlen;
|
---|
715 |
|
---|
716 | (void)instate; /* no use for this yet */
|
---|
717 |
|
---|
718 | if(smtpcode/100 != 2 && smtpcode != 1) {
|
---|
719 | if(data->set.use_ssl <= CURLUSESSL_TRY || conn->ssl[FIRSTSOCKET].use)
|
---|
720 | result = smtp_perform_helo(conn);
|
---|
721 | else {
|
---|
722 | failf(data, "Remote access denied: %d", smtpcode);
|
---|
723 | result = CURLE_REMOTE_ACCESS_DENIED;
|
---|
724 | }
|
---|
725 | }
|
---|
726 | else {
|
---|
727 | line += 4;
|
---|
728 | len -= 4;
|
---|
729 |
|
---|
730 | /* Does the server support the STARTTLS capability? */
|
---|
731 | if(len >= 8 && !memcmp(line, "STARTTLS", 8))
|
---|
732 | smtpc->tls_supported = TRUE;
|
---|
733 |
|
---|
734 | /* Does the server support the SIZE capability? */
|
---|
735 | else if(len >= 4 && !memcmp(line, "SIZE", 4))
|
---|
736 | smtpc->size_supported = TRUE;
|
---|
737 |
|
---|
738 | /* Does the server support authentication? */
|
---|
739 | else if(len >= 5 && !memcmp(line, "AUTH ", 5)) {
|
---|
740 | smtpc->auth_supported = TRUE;
|
---|
741 |
|
---|
742 | /* Advance past the AUTH keyword */
|
---|
743 | line += 5;
|
---|
744 | len -= 5;
|
---|
745 |
|
---|
746 | /* Loop through the data line */
|
---|
747 | for(;;) {
|
---|
748 | size_t llen;
|
---|
749 | unsigned int mechbit;
|
---|
750 |
|
---|
751 | while(len &&
|
---|
752 | (*line == ' ' || *line == '\t' ||
|
---|
753 | *line == '\r' || *line == '\n')) {
|
---|
754 |
|
---|
755 | line++;
|
---|
756 | len--;
|
---|
757 | }
|
---|
758 |
|
---|
759 | if(!len)
|
---|
760 | break;
|
---|
761 |
|
---|
762 | /* Extract the word */
|
---|
763 | for(wordlen = 0; wordlen < len && line[wordlen] != ' ' &&
|
---|
764 | line[wordlen] != '\t' && line[wordlen] != '\r' &&
|
---|
765 | line[wordlen] != '\n';)
|
---|
766 | wordlen++;
|
---|
767 |
|
---|
768 | /* Test the word for a matching authentication mechanism */
|
---|
769 | if((mechbit = Curl_sasl_decode_mech(line, wordlen, &llen)) &&
|
---|
770 | llen == wordlen)
|
---|
771 | smtpc->sasl.authmechs |= mechbit;
|
---|
772 |
|
---|
773 | line += wordlen;
|
---|
774 | len -= wordlen;
|
---|
775 | }
|
---|
776 | }
|
---|
777 |
|
---|
778 | if(smtpcode != 1) {
|
---|
779 | if(data->set.use_ssl && !conn->ssl[FIRSTSOCKET].use) {
|
---|
780 | /* We don't have a SSL/TLS connection yet, but SSL is requested */
|
---|
781 | if(smtpc->tls_supported)
|
---|
782 | /* Switch to TLS connection now */
|
---|
783 | result = smtp_perform_starttls(conn);
|
---|
784 | else if(data->set.use_ssl == CURLUSESSL_TRY)
|
---|
785 | /* Fallback and carry on with authentication */
|
---|
786 | result = smtp_perform_authentication(conn);
|
---|
787 | else {
|
---|
788 | failf(data, "STARTTLS not supported.");
|
---|
789 | result = CURLE_USE_SSL_FAILED;
|
---|
790 | }
|
---|
791 | }
|
---|
792 | else
|
---|
793 | result = smtp_perform_authentication(conn);
|
---|
794 | }
|
---|
795 | }
|
---|
796 |
|
---|
797 | return result;
|
---|
798 | }
|
---|
799 |
|
---|
800 | /* For HELO responses */
|
---|
801 | static CURLcode smtp_state_helo_resp(struct connectdata *conn, int smtpcode,
|
---|
802 | smtpstate instate)
|
---|
803 | {
|
---|
804 | CURLcode result = CURLE_OK;
|
---|
805 | struct SessionHandle *data = conn->data;
|
---|
806 |
|
---|
807 | (void)instate; /* no use for this yet */
|
---|
808 |
|
---|
809 | if(smtpcode/100 != 2) {
|
---|
810 | failf(data, "Remote access denied: %d", smtpcode);
|
---|
811 | result = CURLE_REMOTE_ACCESS_DENIED;
|
---|
812 | }
|
---|
813 | else
|
---|
814 | /* End of connect phase */
|
---|
815 | state(conn, SMTP_STOP);
|
---|
816 |
|
---|
817 | return result;
|
---|
818 | }
|
---|
819 |
|
---|
820 | /* For SASL authentication responses */
|
---|
821 | static CURLcode smtp_state_auth_resp(struct connectdata *conn,
|
---|
822 | int smtpcode,
|
---|
823 | smtpstate instate)
|
---|
824 | {
|
---|
825 | CURLcode result = CURLE_OK;
|
---|
826 | struct SessionHandle *data = conn->data;
|
---|
827 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
828 | saslprogress progress;
|
---|
829 |
|
---|
830 | (void)instate; /* no use for this yet */
|
---|
831 |
|
---|
832 | result = Curl_sasl_continue(&smtpc->sasl, conn, smtpcode, &progress);
|
---|
833 | if(!result)
|
---|
834 | switch(progress) {
|
---|
835 | case SASL_DONE:
|
---|
836 | state(conn, SMTP_STOP); /* Authenticated */
|
---|
837 | break;
|
---|
838 | case SASL_IDLE: /* No mechanism left after cancellation */
|
---|
839 | failf(data, "Authentication cancelled");
|
---|
840 | result = CURLE_LOGIN_DENIED;
|
---|
841 | break;
|
---|
842 | default:
|
---|
843 | break;
|
---|
844 | }
|
---|
845 |
|
---|
846 | return result;
|
---|
847 | }
|
---|
848 |
|
---|
849 | /* For command responses */
|
---|
850 | static CURLcode smtp_state_command_resp(struct connectdata *conn, int smtpcode,
|
---|
851 | smtpstate instate)
|
---|
852 | {
|
---|
853 | CURLcode result = CURLE_OK;
|
---|
854 | struct SessionHandle *data = conn->data;
|
---|
855 | struct SMTP *smtp = data->req.protop;
|
---|
856 | char *line = data->state.buffer;
|
---|
857 | size_t len = strlen(line);
|
---|
858 |
|
---|
859 | (void)instate; /* no use for this yet */
|
---|
860 |
|
---|
861 | if((smtp->rcpt && smtpcode/100 != 2 && smtpcode != 553 && smtpcode != 1) ||
|
---|
862 | (!smtp->rcpt && smtpcode/100 != 2 && smtpcode != 1)) {
|
---|
863 | failf(data, "Command failed: %d", smtpcode);
|
---|
864 | result = CURLE_RECV_ERROR;
|
---|
865 | }
|
---|
866 | else {
|
---|
867 | /* Temporarily add the LF character back and send as body to the client */
|
---|
868 | if(!data->set.opt_no_body) {
|
---|
869 | line[len] = '\n';
|
---|
870 | result = Curl_client_write(conn, CLIENTWRITE_BODY, line, len + 1);
|
---|
871 | line[len] = '\0';
|
---|
872 | }
|
---|
873 |
|
---|
874 | if(smtpcode != 1) {
|
---|
875 | if(smtp->rcpt) {
|
---|
876 | smtp->rcpt = smtp->rcpt->next;
|
---|
877 |
|
---|
878 | if(smtp->rcpt) {
|
---|
879 | /* Send the next command */
|
---|
880 | result = smtp_perform_command(conn);
|
---|
881 | }
|
---|
882 | else
|
---|
883 | /* End of DO phase */
|
---|
884 | state(conn, SMTP_STOP);
|
---|
885 | }
|
---|
886 | else
|
---|
887 | /* End of DO phase */
|
---|
888 | state(conn, SMTP_STOP);
|
---|
889 | }
|
---|
890 | }
|
---|
891 |
|
---|
892 | return result;
|
---|
893 | }
|
---|
894 |
|
---|
895 | /* For MAIL responses */
|
---|
896 | static CURLcode smtp_state_mail_resp(struct connectdata *conn, int smtpcode,
|
---|
897 | smtpstate instate)
|
---|
898 | {
|
---|
899 | CURLcode result = CURLE_OK;
|
---|
900 | struct SessionHandle *data = conn->data;
|
---|
901 |
|
---|
902 | (void)instate; /* no use for this yet */
|
---|
903 |
|
---|
904 | if(smtpcode/100 != 2) {
|
---|
905 | failf(data, "MAIL failed: %d", smtpcode);
|
---|
906 | result = CURLE_SEND_ERROR;
|
---|
907 | }
|
---|
908 | else
|
---|
909 | /* Start the RCPT TO command */
|
---|
910 | result = smtp_perform_rcpt_to(conn);
|
---|
911 |
|
---|
912 | return result;
|
---|
913 | }
|
---|
914 |
|
---|
915 | /* For RCPT responses */
|
---|
916 | static CURLcode smtp_state_rcpt_resp(struct connectdata *conn, int smtpcode,
|
---|
917 | smtpstate instate)
|
---|
918 | {
|
---|
919 | CURLcode result = CURLE_OK;
|
---|
920 | struct SessionHandle *data = conn->data;
|
---|
921 | struct SMTP *smtp = data->req.protop;
|
---|
922 |
|
---|
923 | (void)instate; /* no use for this yet */
|
---|
924 |
|
---|
925 | if(smtpcode/100 != 2) {
|
---|
926 | failf(data, "RCPT failed: %d", smtpcode);
|
---|
927 | result = CURLE_SEND_ERROR;
|
---|
928 | }
|
---|
929 | else {
|
---|
930 | smtp->rcpt = smtp->rcpt->next;
|
---|
931 |
|
---|
932 | if(smtp->rcpt)
|
---|
933 | /* Send the next RCPT TO command */
|
---|
934 | result = smtp_perform_rcpt_to(conn);
|
---|
935 | else {
|
---|
936 | /* Send the DATA command */
|
---|
937 | result = Curl_pp_sendf(&conn->proto.smtpc.pp, "%s", "DATA");
|
---|
938 |
|
---|
939 | if(!result)
|
---|
940 | state(conn, SMTP_DATA);
|
---|
941 | }
|
---|
942 | }
|
---|
943 |
|
---|
944 | return result;
|
---|
945 | }
|
---|
946 |
|
---|
947 | /* For DATA response */
|
---|
948 | static CURLcode smtp_state_data_resp(struct connectdata *conn, int smtpcode,
|
---|
949 | smtpstate instate)
|
---|
950 | {
|
---|
951 | CURLcode result = CURLE_OK;
|
---|
952 | struct SessionHandle *data = conn->data;
|
---|
953 |
|
---|
954 | (void)instate; /* no use for this yet */
|
---|
955 |
|
---|
956 | if(smtpcode != 354) {
|
---|
957 | failf(data, "DATA failed: %d", smtpcode);
|
---|
958 | result = CURLE_SEND_ERROR;
|
---|
959 | }
|
---|
960 | else {
|
---|
961 | /* Set the progress upload size */
|
---|
962 | Curl_pgrsSetUploadSize(data, data->state.infilesize);
|
---|
963 |
|
---|
964 | /* SMTP upload */
|
---|
965 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, FIRSTSOCKET, NULL);
|
---|
966 |
|
---|
967 | /* End of DO phase */
|
---|
968 | state(conn, SMTP_STOP);
|
---|
969 | }
|
---|
970 |
|
---|
971 | return result;
|
---|
972 | }
|
---|
973 |
|
---|
974 | /* For POSTDATA responses, which are received after the entire DATA
|
---|
975 | part has been sent to the server */
|
---|
976 | static CURLcode smtp_state_postdata_resp(struct connectdata *conn,
|
---|
977 | int smtpcode,
|
---|
978 | smtpstate instate)
|
---|
979 | {
|
---|
980 | CURLcode result = CURLE_OK;
|
---|
981 |
|
---|
982 | (void)instate; /* no use for this yet */
|
---|
983 |
|
---|
984 | if(smtpcode != 250)
|
---|
985 | result = CURLE_RECV_ERROR;
|
---|
986 |
|
---|
987 | /* End of DONE phase */
|
---|
988 | state(conn, SMTP_STOP);
|
---|
989 |
|
---|
990 | return result;
|
---|
991 | }
|
---|
992 |
|
---|
993 | static CURLcode smtp_statemach_act(struct connectdata *conn)
|
---|
994 | {
|
---|
995 | CURLcode result = CURLE_OK;
|
---|
996 | curl_socket_t sock = conn->sock[FIRSTSOCKET];
|
---|
997 | struct SessionHandle *data = conn->data;
|
---|
998 | int smtpcode;
|
---|
999 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1000 | struct pingpong *pp = &smtpc->pp;
|
---|
1001 | size_t nread = 0;
|
---|
1002 |
|
---|
1003 | /* Busy upgrading the connection; right now all I/O is SSL/TLS, not SMTP */
|
---|
1004 | if(smtpc->state == SMTP_UPGRADETLS)
|
---|
1005 | return smtp_perform_upgrade_tls(conn);
|
---|
1006 |
|
---|
1007 | /* Flush any data that needs to be sent */
|
---|
1008 | if(pp->sendleft)
|
---|
1009 | return Curl_pp_flushsend(pp);
|
---|
1010 |
|
---|
1011 | do {
|
---|
1012 | /* Read the response from the server */
|
---|
1013 | result = Curl_pp_readresp(sock, pp, &smtpcode, &nread);
|
---|
1014 | if(result)
|
---|
1015 | return result;
|
---|
1016 |
|
---|
1017 | /* Store the latest response for later retrieval if necessary */
|
---|
1018 | if(smtpc->state != SMTP_QUIT && smtpcode != 1)
|
---|
1019 | data->info.httpcode = smtpcode;
|
---|
1020 |
|
---|
1021 | if(!smtpcode)
|
---|
1022 | break;
|
---|
1023 |
|
---|
1024 | /* We have now received a full SMTP server response */
|
---|
1025 | switch(smtpc->state) {
|
---|
1026 | case SMTP_SERVERGREET:
|
---|
1027 | result = smtp_state_servergreet_resp(conn, smtpcode, smtpc->state);
|
---|
1028 | break;
|
---|
1029 |
|
---|
1030 | case SMTP_EHLO:
|
---|
1031 | result = smtp_state_ehlo_resp(conn, smtpcode, smtpc->state);
|
---|
1032 | break;
|
---|
1033 |
|
---|
1034 | case SMTP_HELO:
|
---|
1035 | result = smtp_state_helo_resp(conn, smtpcode, smtpc->state);
|
---|
1036 | break;
|
---|
1037 |
|
---|
1038 | case SMTP_STARTTLS:
|
---|
1039 | result = smtp_state_starttls_resp(conn, smtpcode, smtpc->state);
|
---|
1040 | break;
|
---|
1041 |
|
---|
1042 | case SMTP_AUTH:
|
---|
1043 | result = smtp_state_auth_resp(conn, smtpcode, smtpc->state);
|
---|
1044 | break;
|
---|
1045 |
|
---|
1046 | case SMTP_COMMAND:
|
---|
1047 | result = smtp_state_command_resp(conn, smtpcode, smtpc->state);
|
---|
1048 | break;
|
---|
1049 |
|
---|
1050 | case SMTP_MAIL:
|
---|
1051 | result = smtp_state_mail_resp(conn, smtpcode, smtpc->state);
|
---|
1052 | break;
|
---|
1053 |
|
---|
1054 | case SMTP_RCPT:
|
---|
1055 | result = smtp_state_rcpt_resp(conn, smtpcode, smtpc->state);
|
---|
1056 | break;
|
---|
1057 |
|
---|
1058 | case SMTP_DATA:
|
---|
1059 | result = smtp_state_data_resp(conn, smtpcode, smtpc->state);
|
---|
1060 | break;
|
---|
1061 |
|
---|
1062 | case SMTP_POSTDATA:
|
---|
1063 | result = smtp_state_postdata_resp(conn, smtpcode, smtpc->state);
|
---|
1064 | break;
|
---|
1065 |
|
---|
1066 | case SMTP_QUIT:
|
---|
1067 | /* fallthrough, just stop! */
|
---|
1068 | default:
|
---|
1069 | /* internal error */
|
---|
1070 | state(conn, SMTP_STOP);
|
---|
1071 | break;
|
---|
1072 | }
|
---|
1073 | } while(!result && smtpc->state != SMTP_STOP && Curl_pp_moredata(pp));
|
---|
1074 |
|
---|
1075 | return result;
|
---|
1076 | }
|
---|
1077 |
|
---|
1078 | /* Called repeatedly until done from multi.c */
|
---|
1079 | static CURLcode smtp_multi_statemach(struct connectdata *conn, bool *done)
|
---|
1080 | {
|
---|
1081 | CURLcode result = CURLE_OK;
|
---|
1082 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1083 |
|
---|
1084 | if((conn->handler->flags & PROTOPT_SSL) && !smtpc->ssldone) {
|
---|
1085 | result = Curl_ssl_connect_nonblocking(conn, FIRSTSOCKET, &smtpc->ssldone);
|
---|
1086 | if(result || !smtpc->ssldone)
|
---|
1087 | return result;
|
---|
1088 | }
|
---|
1089 |
|
---|
1090 | result = Curl_pp_statemach(&smtpc->pp, FALSE);
|
---|
1091 | *done = (smtpc->state == SMTP_STOP) ? TRUE : FALSE;
|
---|
1092 |
|
---|
1093 | return result;
|
---|
1094 | }
|
---|
1095 |
|
---|
1096 | static CURLcode smtp_block_statemach(struct connectdata *conn)
|
---|
1097 | {
|
---|
1098 | CURLcode result = CURLE_OK;
|
---|
1099 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1100 |
|
---|
1101 | while(smtpc->state != SMTP_STOP && !result)
|
---|
1102 | result = Curl_pp_statemach(&smtpc->pp, TRUE);
|
---|
1103 |
|
---|
1104 | return result;
|
---|
1105 | }
|
---|
1106 |
|
---|
1107 | /* Allocate and initialize the SMTP struct for the current SessionHandle if
|
---|
1108 | required */
|
---|
1109 | static CURLcode smtp_init(struct connectdata *conn)
|
---|
1110 | {
|
---|
1111 | CURLcode result = CURLE_OK;
|
---|
1112 | struct SessionHandle *data = conn->data;
|
---|
1113 | struct SMTP *smtp;
|
---|
1114 |
|
---|
1115 | smtp = data->req.protop = calloc(sizeof(struct SMTP), 1);
|
---|
1116 | if(!smtp)
|
---|
1117 | result = CURLE_OUT_OF_MEMORY;
|
---|
1118 |
|
---|
1119 | return result;
|
---|
1120 | }
|
---|
1121 |
|
---|
1122 | /* For the SMTP "protocol connect" and "doing" phases only */
|
---|
1123 | static int smtp_getsock(struct connectdata *conn, curl_socket_t *socks,
|
---|
1124 | int numsocks)
|
---|
1125 | {
|
---|
1126 | return Curl_pp_getsock(&conn->proto.smtpc.pp, socks, numsocks);
|
---|
1127 | }
|
---|
1128 |
|
---|
1129 | /***********************************************************************
|
---|
1130 | *
|
---|
1131 | * smtp_connect()
|
---|
1132 | *
|
---|
1133 | * This function should do everything that is to be considered a part of
|
---|
1134 | * the connection phase.
|
---|
1135 | *
|
---|
1136 | * The variable pointed to by 'done' will be TRUE if the protocol-layer
|
---|
1137 | * connect phase is done when this function returns, or FALSE if not.
|
---|
1138 | */
|
---|
1139 | static CURLcode smtp_connect(struct connectdata *conn, bool *done)
|
---|
1140 | {
|
---|
1141 | CURLcode result = CURLE_OK;
|
---|
1142 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1143 | struct pingpong *pp = &smtpc->pp;
|
---|
1144 |
|
---|
1145 | *done = FALSE; /* default to not done yet */
|
---|
1146 |
|
---|
1147 | /* We always support persistent connections in SMTP */
|
---|
1148 | connkeep(conn, "SMTP default");
|
---|
1149 |
|
---|
1150 | /* Set the default response time-out */
|
---|
1151 | pp->response_time = RESP_TIMEOUT;
|
---|
1152 | pp->statemach_act = smtp_statemach_act;
|
---|
1153 | pp->endofresp = smtp_endofresp;
|
---|
1154 | pp->conn = conn;
|
---|
1155 |
|
---|
1156 | /* Initialize the SASL storage */
|
---|
1157 | Curl_sasl_init(&smtpc->sasl, &saslsmtp);
|
---|
1158 |
|
---|
1159 | /* Initialise the pingpong layer */
|
---|
1160 | Curl_pp_init(pp);
|
---|
1161 |
|
---|
1162 | /* Parse the URL options */
|
---|
1163 | result = smtp_parse_url_options(conn);
|
---|
1164 | if(result)
|
---|
1165 | return result;
|
---|
1166 |
|
---|
1167 | /* Parse the URL path */
|
---|
1168 | result = smtp_parse_url_path(conn);
|
---|
1169 | if(result)
|
---|
1170 | return result;
|
---|
1171 |
|
---|
1172 | /* Start off waiting for the server greeting response */
|
---|
1173 | state(conn, SMTP_SERVERGREET);
|
---|
1174 |
|
---|
1175 | result = smtp_multi_statemach(conn, done);
|
---|
1176 |
|
---|
1177 | return result;
|
---|
1178 | }
|
---|
1179 |
|
---|
1180 | /***********************************************************************
|
---|
1181 | *
|
---|
1182 | * smtp_done()
|
---|
1183 | *
|
---|
1184 | * The DONE function. This does what needs to be done after a single DO has
|
---|
1185 | * performed.
|
---|
1186 | *
|
---|
1187 | * Input argument is already checked for validity.
|
---|
1188 | */
|
---|
1189 | static CURLcode smtp_done(struct connectdata *conn, CURLcode status,
|
---|
1190 | bool premature)
|
---|
1191 | {
|
---|
1192 | CURLcode result = CURLE_OK;
|
---|
1193 | struct SessionHandle *data = conn->data;
|
---|
1194 | struct SMTP *smtp = data->req.protop;
|
---|
1195 | struct pingpong *pp = &conn->proto.smtpc.pp;
|
---|
1196 | char *eob;
|
---|
1197 | ssize_t len;
|
---|
1198 | ssize_t bytes_written;
|
---|
1199 |
|
---|
1200 | (void)premature;
|
---|
1201 |
|
---|
1202 | if(!smtp || !pp->conn)
|
---|
1203 | /* When the easy handle is removed from the multi interface while libcurl
|
---|
1204 | is still trying to resolve the host name, the SMTP struct is not yet
|
---|
1205 | initialized. However, the removal action calls Curl_done() which in
|
---|
1206 | turn calls this function, so we simply return success. */
|
---|
1207 | return CURLE_OK;
|
---|
1208 |
|
---|
1209 | if(status) {
|
---|
1210 | connclose(conn, "SMTP done with bad status"); /* marked for closure */
|
---|
1211 | result = status; /* use the already set error code */
|
---|
1212 | }
|
---|
1213 | else if(!data->set.connect_only && data->set.upload && data->set.mail_rcpt) {
|
---|
1214 | /* Calculate the EOB taking into account any terminating CRLF from the
|
---|
1215 | previous line of the email or the CRLF of the DATA command when there
|
---|
1216 | is "no mail data". RFC-5321, sect. 4.1.1.4.
|
---|
1217 |
|
---|
1218 | Note: As some SSL backends, such as OpenSSL, will cause Curl_write() to
|
---|
1219 | fail when using a different pointer following a previous write, that
|
---|
1220 | returned CURLE_AGAIN, we duplicate the EOB now rather than when the
|
---|
1221 | bytes written doesn't equal len. */
|
---|
1222 | if(smtp->trailing_crlf || !conn->data->state.infilesize) {
|
---|
1223 | eob = strdup(SMTP_EOB + 2);
|
---|
1224 | len = SMTP_EOB_LEN - 2;
|
---|
1225 | }
|
---|
1226 | else {
|
---|
1227 | eob = strdup(SMTP_EOB);
|
---|
1228 | len = SMTP_EOB_LEN;
|
---|
1229 | }
|
---|
1230 |
|
---|
1231 | if(!eob)
|
---|
1232 | return CURLE_OUT_OF_MEMORY;
|
---|
1233 |
|
---|
1234 | /* Send the end of block data */
|
---|
1235 | result = Curl_write(conn, conn->writesockfd, eob, len, &bytes_written);
|
---|
1236 | if(result) {
|
---|
1237 | free(eob);
|
---|
1238 | return result;
|
---|
1239 | }
|
---|
1240 |
|
---|
1241 | if(bytes_written != len) {
|
---|
1242 | /* The whole chunk was not sent so keep it around and adjust the
|
---|
1243 | pingpong structure accordingly */
|
---|
1244 | pp->sendthis = eob;
|
---|
1245 | pp->sendsize = len;
|
---|
1246 | pp->sendleft = len - bytes_written;
|
---|
1247 | }
|
---|
1248 | else {
|
---|
1249 | /* Successfully sent so adjust the response timeout relative to now */
|
---|
1250 | pp->response = Curl_tvnow();
|
---|
1251 |
|
---|
1252 | free(eob);
|
---|
1253 | }
|
---|
1254 |
|
---|
1255 | state(conn, SMTP_POSTDATA);
|
---|
1256 |
|
---|
1257 | /* Run the state-machine
|
---|
1258 |
|
---|
1259 | TODO: when the multi interface is used, this _really_ should be using
|
---|
1260 | the smtp_multi_statemach function but we have no general support for
|
---|
1261 | non-blocking DONE operations, not in the multi state machine and with
|
---|
1262 | Curl_done() invokes on several places in the code!
|
---|
1263 | */
|
---|
1264 | result = smtp_block_statemach(conn);
|
---|
1265 | }
|
---|
1266 |
|
---|
1267 | /* Cleanup our per-request based variables */
|
---|
1268 | Curl_safefree(smtp->custom);
|
---|
1269 |
|
---|
1270 | /* Clear the transfer mode for the next request */
|
---|
1271 | smtp->transfer = FTPTRANSFER_BODY;
|
---|
1272 |
|
---|
1273 | return result;
|
---|
1274 | }
|
---|
1275 |
|
---|
1276 | /***********************************************************************
|
---|
1277 | *
|
---|
1278 | * smtp_perform()
|
---|
1279 | *
|
---|
1280 | * This is the actual DO function for SMTP. Transfer a mail, send a command
|
---|
1281 | * or get some data according to the options previously setup.
|
---|
1282 | */
|
---|
1283 | static CURLcode smtp_perform(struct connectdata *conn, bool *connected,
|
---|
1284 | bool *dophase_done)
|
---|
1285 | {
|
---|
1286 | /* This is SMTP and no proxy */
|
---|
1287 | CURLcode result = CURLE_OK;
|
---|
1288 | struct SessionHandle *data = conn->data;
|
---|
1289 | struct SMTP *smtp = data->req.protop;
|
---|
1290 |
|
---|
1291 | DEBUGF(infof(conn->data, "DO phase starts\n"));
|
---|
1292 |
|
---|
1293 | if(data->set.opt_no_body) {
|
---|
1294 | /* Requested no body means no transfer */
|
---|
1295 | smtp->transfer = FTPTRANSFER_INFO;
|
---|
1296 | }
|
---|
1297 |
|
---|
1298 | *dophase_done = FALSE; /* not done yet */
|
---|
1299 |
|
---|
1300 | /* Store the first recipient (or NULL if not specified) */
|
---|
1301 | smtp->rcpt = data->set.mail_rcpt;
|
---|
1302 |
|
---|
1303 | /* Start the first command in the DO phase */
|
---|
1304 | if(data->set.upload && data->set.mail_rcpt)
|
---|
1305 | /* MAIL transfer */
|
---|
1306 | result = smtp_perform_mail(conn);
|
---|
1307 | else
|
---|
1308 | /* SMTP based command (VRFY, EXPN, NOOP, RSET or HELP) */
|
---|
1309 | result = smtp_perform_command(conn);
|
---|
1310 |
|
---|
1311 | if(result)
|
---|
1312 | return result;
|
---|
1313 |
|
---|
1314 | /* Run the state-machine */
|
---|
1315 | result = smtp_multi_statemach(conn, dophase_done);
|
---|
1316 |
|
---|
1317 | *connected = conn->bits.tcpconnect[FIRSTSOCKET];
|
---|
1318 |
|
---|
1319 | if(*dophase_done)
|
---|
1320 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
1321 |
|
---|
1322 | return result;
|
---|
1323 | }
|
---|
1324 |
|
---|
1325 | /***********************************************************************
|
---|
1326 | *
|
---|
1327 | * smtp_do()
|
---|
1328 | *
|
---|
1329 | * This function is registered as 'curl_do' function. It decodes the path
|
---|
1330 | * parts etc as a wrapper to the actual DO function (smtp_perform).
|
---|
1331 | *
|
---|
1332 | * The input argument is already checked for validity.
|
---|
1333 | */
|
---|
1334 | static CURLcode smtp_do(struct connectdata *conn, bool *done)
|
---|
1335 | {
|
---|
1336 | CURLcode result = CURLE_OK;
|
---|
1337 |
|
---|
1338 | *done = FALSE; /* default to false */
|
---|
1339 |
|
---|
1340 | /* Parse the custom request */
|
---|
1341 | result = smtp_parse_custom_request(conn);
|
---|
1342 | if(result)
|
---|
1343 | return result;
|
---|
1344 |
|
---|
1345 | result = smtp_regular_transfer(conn, done);
|
---|
1346 |
|
---|
1347 | return result;
|
---|
1348 | }
|
---|
1349 |
|
---|
1350 | /***********************************************************************
|
---|
1351 | *
|
---|
1352 | * smtp_disconnect()
|
---|
1353 | *
|
---|
1354 | * Disconnect from an SMTP server. Cleanup protocol-specific per-connection
|
---|
1355 | * resources. BLOCKING.
|
---|
1356 | */
|
---|
1357 | static CURLcode smtp_disconnect(struct connectdata *conn, bool dead_connection)
|
---|
1358 | {
|
---|
1359 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1360 |
|
---|
1361 | /* We cannot send quit unconditionally. If this connection is stale or
|
---|
1362 | bad in any way, sending quit and waiting around here will make the
|
---|
1363 | disconnect wait in vain and cause more problems than we need to. */
|
---|
1364 |
|
---|
1365 | /* The SMTP session may or may not have been allocated/setup at this
|
---|
1366 | point! */
|
---|
1367 | if(!dead_connection && smtpc->pp.conn && smtpc->pp.conn->bits.protoconnstart)
|
---|
1368 | if(!smtp_perform_quit(conn))
|
---|
1369 | (void)smtp_block_statemach(conn); /* ignore errors on QUIT */
|
---|
1370 |
|
---|
1371 | /* Disconnect from the server */
|
---|
1372 | Curl_pp_disconnect(&smtpc->pp);
|
---|
1373 |
|
---|
1374 | /* Cleanup the SASL module */
|
---|
1375 | Curl_sasl_cleanup(conn, smtpc->sasl.authused);
|
---|
1376 |
|
---|
1377 | /* Cleanup our connection based variables */
|
---|
1378 | Curl_safefree(smtpc->domain);
|
---|
1379 |
|
---|
1380 | return CURLE_OK;
|
---|
1381 | }
|
---|
1382 |
|
---|
1383 | /* Call this when the DO phase has completed */
|
---|
1384 | static CURLcode smtp_dophase_done(struct connectdata *conn, bool connected)
|
---|
1385 | {
|
---|
1386 | struct SMTP *smtp = conn->data->req.protop;
|
---|
1387 |
|
---|
1388 | (void)connected;
|
---|
1389 |
|
---|
1390 | if(smtp->transfer != FTPTRANSFER_BODY)
|
---|
1391 | /* no data to transfer */
|
---|
1392 | Curl_setup_transfer(conn, -1, -1, FALSE, NULL, -1, NULL);
|
---|
1393 |
|
---|
1394 | return CURLE_OK;
|
---|
1395 | }
|
---|
1396 |
|
---|
1397 | /* Called from multi.c while DOing */
|
---|
1398 | static CURLcode smtp_doing(struct connectdata *conn, bool *dophase_done)
|
---|
1399 | {
|
---|
1400 | CURLcode result = smtp_multi_statemach(conn, dophase_done);
|
---|
1401 |
|
---|
1402 | if(result)
|
---|
1403 | DEBUGF(infof(conn->data, "DO phase failed\n"));
|
---|
1404 | else if(*dophase_done) {
|
---|
1405 | result = smtp_dophase_done(conn, FALSE /* not connected */);
|
---|
1406 |
|
---|
1407 | DEBUGF(infof(conn->data, "DO phase is complete\n"));
|
---|
1408 | }
|
---|
1409 |
|
---|
1410 | return result;
|
---|
1411 | }
|
---|
1412 |
|
---|
1413 | /***********************************************************************
|
---|
1414 | *
|
---|
1415 | * smtp_regular_transfer()
|
---|
1416 | *
|
---|
1417 | * The input argument is already checked for validity.
|
---|
1418 | *
|
---|
1419 | * Performs all commands done before a regular transfer between a local and a
|
---|
1420 | * remote host.
|
---|
1421 | */
|
---|
1422 | static CURLcode smtp_regular_transfer(struct connectdata *conn,
|
---|
1423 | bool *dophase_done)
|
---|
1424 | {
|
---|
1425 | CURLcode result = CURLE_OK;
|
---|
1426 | bool connected = FALSE;
|
---|
1427 | struct SessionHandle *data = conn->data;
|
---|
1428 |
|
---|
1429 | /* Make sure size is unknown at this point */
|
---|
1430 | data->req.size = -1;
|
---|
1431 |
|
---|
1432 | /* Set the progress data */
|
---|
1433 | Curl_pgrsSetUploadCounter(data, 0);
|
---|
1434 | Curl_pgrsSetDownloadCounter(data, 0);
|
---|
1435 | Curl_pgrsSetUploadSize(data, -1);
|
---|
1436 | Curl_pgrsSetDownloadSize(data, -1);
|
---|
1437 |
|
---|
1438 | /* Carry out the perform */
|
---|
1439 | result = smtp_perform(conn, &connected, dophase_done);
|
---|
1440 |
|
---|
1441 | /* Perform post DO phase operations if necessary */
|
---|
1442 | if(!result && *dophase_done)
|
---|
1443 | result = smtp_dophase_done(conn, connected);
|
---|
1444 |
|
---|
1445 | return result;
|
---|
1446 | }
|
---|
1447 |
|
---|
1448 | static CURLcode smtp_setup_connection(struct connectdata *conn)
|
---|
1449 | {
|
---|
1450 | struct SessionHandle *data = conn->data;
|
---|
1451 | CURLcode result;
|
---|
1452 |
|
---|
1453 | if(conn->bits.httpproxy && !data->set.tunnel_thru_httpproxy) {
|
---|
1454 | /* Unless we have asked to tunnel SMTP operations through the proxy, we
|
---|
1455 | switch and use HTTP operations only */
|
---|
1456 | #ifndef CURL_DISABLE_HTTP
|
---|
1457 | if(conn->handler == &Curl_handler_smtp)
|
---|
1458 | conn->handler = &Curl_handler_smtp_proxy;
|
---|
1459 | else {
|
---|
1460 | #ifdef USE_SSL
|
---|
1461 | conn->handler = &Curl_handler_smtps_proxy;
|
---|
1462 | #else
|
---|
1463 | failf(data, "SMTPS not supported!");
|
---|
1464 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
1465 | #endif
|
---|
1466 | }
|
---|
1467 | /* set it up as a HTTP connection instead */
|
---|
1468 | return conn->handler->setup_connection(conn);
|
---|
1469 |
|
---|
1470 | #else
|
---|
1471 | failf(data, "SMTP over http proxy requires HTTP support built-in!");
|
---|
1472 | return CURLE_UNSUPPORTED_PROTOCOL;
|
---|
1473 | #endif
|
---|
1474 | }
|
---|
1475 |
|
---|
1476 | /* Initialise the SMTP layer */
|
---|
1477 | result = smtp_init(conn);
|
---|
1478 | if(result)
|
---|
1479 | return result;
|
---|
1480 |
|
---|
1481 | data->state.path++; /* don't include the initial slash */
|
---|
1482 |
|
---|
1483 | return CURLE_OK;
|
---|
1484 | }
|
---|
1485 |
|
---|
1486 | /***********************************************************************
|
---|
1487 | *
|
---|
1488 | * smtp_parse_url_options()
|
---|
1489 | *
|
---|
1490 | * Parse the URL login options.
|
---|
1491 | */
|
---|
1492 | static CURLcode smtp_parse_url_options(struct connectdata *conn)
|
---|
1493 | {
|
---|
1494 | CURLcode result = CURLE_OK;
|
---|
1495 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1496 | const char *ptr = conn->options;
|
---|
1497 |
|
---|
1498 | smtpc->sasl.resetprefs = TRUE;
|
---|
1499 |
|
---|
1500 | while(!result && ptr && *ptr) {
|
---|
1501 | const char *key = ptr;
|
---|
1502 | const char *value;
|
---|
1503 |
|
---|
1504 | while(*ptr && *ptr != '=')
|
---|
1505 | ptr++;
|
---|
1506 |
|
---|
1507 | value = ptr + 1;
|
---|
1508 |
|
---|
1509 | while(*ptr && *ptr != ';')
|
---|
1510 | ptr++;
|
---|
1511 |
|
---|
1512 | if(strnequal(key, "AUTH=", 5))
|
---|
1513 | result = Curl_sasl_parse_url_auth_option(&smtpc->sasl,
|
---|
1514 | value, ptr - value);
|
---|
1515 | else
|
---|
1516 | result = CURLE_URL_MALFORMAT;
|
---|
1517 |
|
---|
1518 | if(*ptr == ';')
|
---|
1519 | ptr++;
|
---|
1520 | }
|
---|
1521 |
|
---|
1522 | return result;
|
---|
1523 | }
|
---|
1524 |
|
---|
1525 | /***********************************************************************
|
---|
1526 | *
|
---|
1527 | * smtp_parse_url_path()
|
---|
1528 | *
|
---|
1529 | * Parse the URL path into separate path components.
|
---|
1530 | */
|
---|
1531 | static CURLcode smtp_parse_url_path(struct connectdata *conn)
|
---|
1532 | {
|
---|
1533 | /* The SMTP struct is already initialised in smtp_connect() */
|
---|
1534 | struct SessionHandle *data = conn->data;
|
---|
1535 | struct smtp_conn *smtpc = &conn->proto.smtpc;
|
---|
1536 | const char *path = data->state.path;
|
---|
1537 | char localhost[HOSTNAME_MAX + 1];
|
---|
1538 |
|
---|
1539 | /* Calculate the path if necessary */
|
---|
1540 | if(!*path) {
|
---|
1541 | if(!Curl_gethostname(localhost, sizeof(localhost)))
|
---|
1542 | path = localhost;
|
---|
1543 | else
|
---|
1544 | path = "localhost";
|
---|
1545 | }
|
---|
1546 |
|
---|
1547 | /* URL decode the path and use it as the domain in our EHLO */
|
---|
1548 | return Curl_urldecode(conn->data, path, 0, &smtpc->domain, NULL, TRUE);
|
---|
1549 | }
|
---|
1550 |
|
---|
1551 | /***********************************************************************
|
---|
1552 | *
|
---|
1553 | * smtp_parse_custom_request()
|
---|
1554 | *
|
---|
1555 | * Parse the custom request.
|
---|
1556 | */
|
---|
1557 | static CURLcode smtp_parse_custom_request(struct connectdata *conn)
|
---|
1558 | {
|
---|
1559 | CURLcode result = CURLE_OK;
|
---|
1560 | struct SessionHandle *data = conn->data;
|
---|
1561 | struct SMTP *smtp = data->req.protop;
|
---|
1562 | const char *custom = data->set.str[STRING_CUSTOMREQUEST];
|
---|
1563 |
|
---|
1564 | /* URL decode the custom request */
|
---|
1565 | if(custom)
|
---|
1566 | result = Curl_urldecode(data, custom, 0, &smtp->custom, NULL, TRUE);
|
---|
1567 |
|
---|
1568 | return result;
|
---|
1569 | }
|
---|
1570 |
|
---|
1571 | CURLcode Curl_smtp_escape_eob(struct connectdata *conn, const ssize_t nread)
|
---|
1572 | {
|
---|
1573 | /* When sending a SMTP payload we must detect CRLF. sequences making sure
|
---|
1574 | they are sent as CRLF.. instead, as a . on the beginning of a line will
|
---|
1575 | be deleted by the server when not part of an EOB terminator and a
|
---|
1576 | genuine CRLF.CRLF which isn't escaped will wrongly be detected as end of
|
---|
1577 | data by the server
|
---|
1578 | */
|
---|
1579 | ssize_t i;
|
---|
1580 | ssize_t si;
|
---|
1581 | struct SessionHandle *data = conn->data;
|
---|
1582 | struct SMTP *smtp = data->req.protop;
|
---|
1583 | char *scratch = data->state.scratch;
|
---|
1584 | char *newscratch = NULL;
|
---|
1585 | char *oldscratch = NULL;
|
---|
1586 | size_t eob_sent;
|
---|
1587 |
|
---|
1588 | /* Do we need to allocate a scratch buffer? */
|
---|
1589 | if(!scratch || data->set.crlf) {
|
---|
1590 | oldscratch = scratch;
|
---|
1591 |
|
---|
1592 | scratch = newscratch = malloc(2 * BUFSIZE);
|
---|
1593 | if(!newscratch) {
|
---|
1594 | failf(data, "Failed to alloc scratch buffer!");
|
---|
1595 |
|
---|
1596 | return CURLE_OUT_OF_MEMORY;
|
---|
1597 | }
|
---|
1598 | }
|
---|
1599 |
|
---|
1600 | /* Have we already sent part of the EOB? */
|
---|
1601 | eob_sent = smtp->eob;
|
---|
1602 |
|
---|
1603 | /* This loop can be improved by some kind of Boyer-Moore style of
|
---|
1604 | approach but that is saved for later... */
|
---|
1605 | for(i = 0, si = 0; i < nread; i++) {
|
---|
1606 | if(SMTP_EOB[smtp->eob] == data->req.upload_fromhere[i]) {
|
---|
1607 | smtp->eob++;
|
---|
1608 |
|
---|
1609 | /* Is the EOB potentially the terminating CRLF? */
|
---|
1610 | if(2 == smtp->eob || SMTP_EOB_LEN == smtp->eob)
|
---|
1611 | smtp->trailing_crlf = TRUE;
|
---|
1612 | else
|
---|
1613 | smtp->trailing_crlf = FALSE;
|
---|
1614 | }
|
---|
1615 | else if(smtp->eob) {
|
---|
1616 | /* A previous substring matched so output that first */
|
---|
1617 | memcpy(&scratch[si], &SMTP_EOB[eob_sent], smtp->eob - eob_sent);
|
---|
1618 | si += smtp->eob - eob_sent;
|
---|
1619 |
|
---|
1620 | /* Then compare the first byte */
|
---|
1621 | if(SMTP_EOB[0] == data->req.upload_fromhere[i])
|
---|
1622 | smtp->eob = 1;
|
---|
1623 | else
|
---|
1624 | smtp->eob = 0;
|
---|
1625 |
|
---|
1626 | eob_sent = 0;
|
---|
1627 |
|
---|
1628 | /* Reset the trailing CRLF flag as there was more data */
|
---|
1629 | smtp->trailing_crlf = FALSE;
|
---|
1630 | }
|
---|
1631 |
|
---|
1632 | /* Do we have a match for CRLF. as per RFC-5321, sect. 4.5.2 */
|
---|
1633 | if(SMTP_EOB_FIND_LEN == smtp->eob) {
|
---|
1634 | /* Copy the replacement data to the target buffer */
|
---|
1635 | memcpy(&scratch[si], &SMTP_EOB_REPL[eob_sent],
|
---|
1636 | SMTP_EOB_REPL_LEN - eob_sent);
|
---|
1637 | si += SMTP_EOB_REPL_LEN - eob_sent;
|
---|
1638 | smtp->eob = 0;
|
---|
1639 | eob_sent = 0;
|
---|
1640 | }
|
---|
1641 | else if(!smtp->eob)
|
---|
1642 | scratch[si++] = data->req.upload_fromhere[i];
|
---|
1643 | }
|
---|
1644 |
|
---|
1645 | if(smtp->eob - eob_sent) {
|
---|
1646 | /* A substring matched before processing ended so output that now */
|
---|
1647 | memcpy(&scratch[si], &SMTP_EOB[eob_sent], smtp->eob - eob_sent);
|
---|
1648 | si += smtp->eob - eob_sent;
|
---|
1649 | }
|
---|
1650 |
|
---|
1651 | /* Only use the new buffer if we replaced something */
|
---|
1652 | if(si != nread) {
|
---|
1653 | /* Upload from the new (replaced) buffer instead */
|
---|
1654 | data->req.upload_fromhere = scratch;
|
---|
1655 |
|
---|
1656 | /* Save the buffer so it can be freed later */
|
---|
1657 | data->state.scratch = scratch;
|
---|
1658 |
|
---|
1659 | /* Free the old scratch buffer */
|
---|
1660 | free(oldscratch);
|
---|
1661 |
|
---|
1662 | /* Set the new amount too */
|
---|
1663 | data->req.upload_present = si;
|
---|
1664 | }
|
---|
1665 | else
|
---|
1666 | free(newscratch);
|
---|
1667 |
|
---|
1668 | return CURLE_OK;
|
---|
1669 | }
|
---|
1670 |
|
---|
1671 | #endif /* CURL_DISABLE_SMTP */
|
---|