1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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4 | * / __| | | | |_) | |
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5 | * | (__| |_| | _ <| |___
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6 | * \___|\___/|_| \_\_____|
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7 | *
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8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 |
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23 | #include "curl_setup.h"
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24 |
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25 | #include <curl/curl.h>
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26 | #include "urldata.h"
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27 | #include "share.h"
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28 | #include "vtls/vtls.h"
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29 | #include "curl_memory.h"
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30 |
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31 | /* The last #include file should be: */
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32 | #include "memdebug.h"
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33 |
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34 | struct Curl_share *
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35 | curl_share_init(void)
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36 | {
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37 | struct Curl_share *share = calloc(1, sizeof(struct Curl_share));
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38 | if(share) {
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39 | share->specifier |= (1<<CURL_LOCK_DATA_SHARE);
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40 |
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41 | if(Curl_mk_dnscache(&share->hostcache)) {
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42 | free(share);
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43 | return NULL;
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44 | }
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45 | }
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46 |
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47 | return share;
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48 | }
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49 |
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50 | #undef curl_share_setopt
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51 | CURLSHcode
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52 | curl_share_setopt(struct Curl_share *share, CURLSHoption option, ...)
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53 | {
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54 | va_list param;
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55 | int type;
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56 | curl_lock_function lockfunc;
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57 | curl_unlock_function unlockfunc;
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58 | void *ptr;
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59 | CURLSHcode res = CURLSHE_OK;
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60 |
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61 | if(share->dirty)
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62 | /* don't allow setting options while one or more handles are already
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63 | using this share */
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64 | return CURLSHE_IN_USE;
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65 |
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66 | va_start(param, option);
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67 |
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68 | switch(option) {
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69 | case CURLSHOPT_SHARE:
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70 | /* this is a type this share will share */
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71 | type = va_arg(param, int);
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72 | share->specifier |= (1<<type);
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73 | switch(type) {
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74 | case CURL_LOCK_DATA_DNS:
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75 | break;
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76 |
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77 | case CURL_LOCK_DATA_COOKIE:
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78 | #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
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79 | if(!share->cookies) {
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80 | share->cookies = Curl_cookie_init(NULL, NULL, NULL, TRUE);
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81 | if(!share->cookies)
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82 | res = CURLSHE_NOMEM;
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83 | }
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84 | #else /* CURL_DISABLE_HTTP */
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85 | res = CURLSHE_NOT_BUILT_IN;
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86 | #endif
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87 | break;
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88 |
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89 | case CURL_LOCK_DATA_SSL_SESSION:
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90 | #ifdef USE_SSL
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91 | if(!share->sslsession) {
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92 | share->max_ssl_sessions = 8;
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93 | share->sslsession = calloc(share->max_ssl_sessions,
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94 | sizeof(struct curl_ssl_session));
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95 | share->sessionage = 0;
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96 | if(!share->sslsession)
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97 | res = CURLSHE_NOMEM;
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98 | }
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99 | #else
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100 | res = CURLSHE_NOT_BUILT_IN;
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101 | #endif
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102 | break;
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103 |
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104 | case CURL_LOCK_DATA_CONNECT: /* not supported (yet) */
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105 | if(Curl_conncache_init(&share->conn_cache, 103))
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106 | res = CURLSHE_NOMEM;
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107 | break;
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108 |
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109 | default:
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110 | res = CURLSHE_BAD_OPTION;
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111 | }
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112 | break;
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113 |
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114 | case CURLSHOPT_UNSHARE:
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115 | /* this is a type this share will no longer share */
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116 | type = va_arg(param, int);
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117 | share->specifier &= ~(1<<type);
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118 | switch(type) {
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119 | case CURL_LOCK_DATA_DNS:
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120 | break;
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121 |
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122 | case CURL_LOCK_DATA_COOKIE:
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123 | #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
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124 | if(share->cookies) {
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125 | Curl_cookie_cleanup(share->cookies);
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126 | share->cookies = NULL;
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127 | }
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128 | #else /* CURL_DISABLE_HTTP */
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129 | res = CURLSHE_NOT_BUILT_IN;
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130 | #endif
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131 | break;
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132 |
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133 | case CURL_LOCK_DATA_SSL_SESSION:
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134 | #ifdef USE_SSL
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135 | Curl_safefree(share->sslsession);
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136 | #else
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137 | res = CURLSHE_NOT_BUILT_IN;
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138 | #endif
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139 | break;
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140 |
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141 | case CURL_LOCK_DATA_CONNECT:
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142 | break;
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143 |
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144 | default:
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145 | res = CURLSHE_BAD_OPTION;
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146 | break;
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147 | }
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148 | break;
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149 |
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150 | case CURLSHOPT_LOCKFUNC:
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151 | lockfunc = va_arg(param, curl_lock_function);
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152 | share->lockfunc = lockfunc;
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153 | break;
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154 |
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155 | case CURLSHOPT_UNLOCKFUNC:
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156 | unlockfunc = va_arg(param, curl_unlock_function);
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157 | share->unlockfunc = unlockfunc;
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158 | break;
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159 |
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160 | case CURLSHOPT_USERDATA:
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161 | ptr = va_arg(param, void *);
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162 | share->clientdata = ptr;
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163 | break;
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164 |
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165 | default:
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166 | res = CURLSHE_BAD_OPTION;
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167 | break;
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168 | }
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169 |
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170 | va_end(param);
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171 |
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172 | return res;
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173 | }
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174 |
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175 | CURLSHcode
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176 | curl_share_cleanup(struct Curl_share *share)
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177 | {
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178 | if(share == NULL)
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179 | return CURLSHE_INVALID;
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180 |
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181 | if(share->lockfunc)
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182 | share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
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183 | share->clientdata);
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184 |
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185 | if(share->dirty) {
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186 | if(share->unlockfunc)
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187 | share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
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188 | return CURLSHE_IN_USE;
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189 | }
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190 |
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191 | Curl_conncache_close_all_connections(&share->conn_cache);
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192 | Curl_conncache_destroy(&share->conn_cache);
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193 | Curl_hash_destroy(&share->hostcache);
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194 |
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195 | #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
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196 | Curl_cookie_cleanup(share->cookies);
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197 | #endif
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198 |
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199 | #ifdef USE_SSL
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200 | if(share->sslsession) {
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201 | size_t i;
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202 | for(i = 0; i < share->max_ssl_sessions; i++)
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203 | Curl_ssl_kill_session(&(share->sslsession[i]));
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204 | free(share->sslsession);
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205 | }
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206 | #endif
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207 |
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208 | if(share->unlockfunc)
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209 | share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
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210 | free(share);
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211 |
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212 | return CURLSHE_OK;
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213 | }
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214 |
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215 |
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216 | CURLSHcode
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217 | Curl_share_lock(struct Curl_easy *data, curl_lock_data type,
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218 | curl_lock_access accesstype)
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219 | {
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220 | struct Curl_share *share = data->share;
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221 |
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222 | if(share == NULL)
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223 | return CURLSHE_INVALID;
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224 |
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225 | if(share->specifier & (1<<type)) {
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226 | if(share->lockfunc) /* only call this if set! */
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227 | share->lockfunc(data, type, accesstype, share->clientdata);
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228 | }
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229 | /* else if we don't share this, pretend successful lock */
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230 |
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231 | return CURLSHE_OK;
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232 | }
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233 |
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234 | CURLSHcode
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235 | Curl_share_unlock(struct Curl_easy *data, curl_lock_data type)
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236 | {
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237 | struct Curl_share *share = data->share;
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238 |
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239 | if(share == NULL)
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240 | return CURLSHE_INVALID;
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241 |
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242 | if(share->specifier & (1<<type)) {
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243 | if(share->unlockfunc) /* only call this if set! */
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244 | share->unlockfunc (data, type, share->clientdata);
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245 | }
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246 |
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247 | return CURLSHE_OK;
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248 | }
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