lib/share.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
   9  *
  10  * This software is licensed as described in the file COPYING, which
  11  * you should have received as part of this distribution. The terms
  12  * are also available at https://curl.haxx.se/docs/copyright.html.
  13  *
  14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  15  * copies of the Software, and permit persons to whom the Software is
  16  * furnished to do so, under the terms of the COPYING file.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ***************************************************************************/
  22
  23 #include "curl_setup.h"
  24
  25 #include <curl/curl.h>
  26 #include "urldata.h"
  27 #include "share.h"
  28 #include "vtls/vtls.h"
  29 #include "curl_memory.h"
  30
  31 /* The last #include file should be: */
  32 #include "memdebug.h"
  33
  34 struct Curl_share *
  35 curl_share_init(void)
  36 {
  37   struct Curl_share *share = calloc(1, sizeof(struct Curl_share));
  38   if(share) {
  39     share->specifier |= (1<<CURL_LOCK_DATA_SHARE);
  40
  41     if(Curl_mk_dnscache(&share->hostcache)) {
  42       free(share);
  43       return NULL;
  44     }
  45   }
  46
  47   return share;
  48 }
  49
  50 #undef curl_share_setopt
  51 CURLSHcode
  52 curl_share_setopt(struct Curl_share *share, CURLSHoption option, ...)
  53 {
  54   va_list param;
  55   int type;
  56   curl_lock_function lockfunc;
  57   curl_unlock_function unlockfunc;
  58   void *ptr;
  59   CURLSHcode res = CURLSHE_OK;
  60
  61   if(share->dirty)
  62     /* don't allow setting options while one or more handles are already
  63        using this share */
  64     return CURLSHE_IN_USE;
  65
  66   va_start(param, option);
  67
  68   switch(option) {
  69   case CURLSHOPT_SHARE:
  70     /* this is a type this share will share */
  71     type = va_arg(param, int);
  72     share->specifier |= (1<<type);
  73     switch(type) {
  74     case CURL_LOCK_DATA_DNS:
  75       break;
  76
  77     case CURL_LOCK_DATA_COOKIE:
  78 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
  79       if(!share->cookies) {
  80         share->cookies = Curl_cookie_init(NULL, NULL, NULL, TRUE);
  81         if(!share->cookies)
  82           res = CURLSHE_NOMEM;
  83       }
  84 #else   /* CURL_DISABLE_HTTP */
  85       res = CURLSHE_NOT_BUILT_IN;
  86 #endif
  87       break;
  88
  89     case CURL_LOCK_DATA_SSL_SESSION:
  90 #ifdef USE_SSL
  91       if(!share->sslsession) {
  92         share->max_ssl_sessions = 8;
  93         share->sslsession = calloc(share->max_ssl_sessions,
  94                                    sizeof(struct curl_ssl_session));
  95         share->sessionage = 0;
  96         if(!share->sslsession)
  97           res = CURLSHE_NOMEM;
  98       }
  99 #else
 100       res = CURLSHE_NOT_BUILT_IN;
 101 #endif
 102       break;
 103
 104     case CURL_LOCK_DATA_CONNECT:     /* not supported (yet) */
 105       break;
 106
 107     default:
 108       res = CURLSHE_BAD_OPTION;
 109     }
 110     break;
 111
 112   case CURLSHOPT_UNSHARE:
 113     /* this is a type this share will no longer share */
 114     type = va_arg(param, int);
 115     share->specifier &= ~(1<<type);
 116     switch(type) {
 117     case CURL_LOCK_DATA_DNS:
 118       break;
 119
 120     case CURL_LOCK_DATA_COOKIE:
 121 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 122       if(share->cookies) {
 123         Curl_cookie_cleanup(share->cookies);
 124         share->cookies = NULL;
 125       }
 126 #else   /* CURL_DISABLE_HTTP */
 127       res = CURLSHE_NOT_BUILT_IN;
 128 #endif
 129       break;
 130
 131     case CURL_LOCK_DATA_SSL_SESSION:
 132 #ifdef USE_SSL
 133       Curl_safefree(share->sslsession);
 134 #else
 135       res = CURLSHE_NOT_BUILT_IN;
 136 #endif
 137       break;
 138
 139     case CURL_LOCK_DATA_CONNECT:
 140       break;
 141
 142     default:
 143       res = CURLSHE_BAD_OPTION;
 144       break;
 145     }
 146     break;
 147
 148   case CURLSHOPT_LOCKFUNC:
 149     lockfunc = va_arg(param, curl_lock_function);
 150     share->lockfunc = lockfunc;
 151     break;
 152
 153   case CURLSHOPT_UNLOCKFUNC:
 154     unlockfunc = va_arg(param, curl_unlock_function);
 155     share->unlockfunc = unlockfunc;
 156     break;
 157
 158   case CURLSHOPT_USERDATA:
 159     ptr = va_arg(param, void *);
 160     share->clientdata = ptr;
 161     break;
 162
 163   default:
 164     res = CURLSHE_BAD_OPTION;
 165     break;
 166   }
 167
 168   va_end(param);
 169
 170   return res;
 171 }
 172
 173 CURLSHcode
 174 curl_share_cleanup(struct Curl_share *share)
 175 {
 176   if(share == NULL)
 177     return CURLSHE_INVALID;
 178
 179   if(share->lockfunc)
 180     share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
 181                     share->clientdata);
 182
 183   if(share->dirty) {
 184     if(share->unlockfunc)
 185       share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 186     return CURLSHE_IN_USE;
 187   }
 188
 189   Curl_hash_destroy(&share->hostcache);
 190
 191 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 192   Curl_cookie_cleanup(share->cookies);
 193 #endif
 194
 195 #ifdef USE_SSL
 196   if(share->sslsession) {
 197     size_t i;
 198     for(i = 0; i < share->max_ssl_sessions; i++)
 199       Curl_ssl_kill_session(&(share->sslsession[i]));
 200     free(share->sslsession);
 201   }
 202 #endif
 203
 204   if(share->unlockfunc)
 205     share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 206   free(share);
 207
 208   return CURLSHE_OK;
 209 }
 210
 211
 212 CURLSHcode
 213 Curl_share_lock(struct Curl_easy *data, curl_lock_data type,
 214                 curl_lock_access accesstype)
 215 {
 216   struct Curl_share *share = data->share;
 217
 218   if(share == NULL)
 219     return CURLSHE_INVALID;
 220
 221   if(share->specifier & (1<<type)) {
 222     if(share->lockfunc) /* only call this if set! */
 223       share->lockfunc(data, type, accesstype, share->clientdata);
 224   }
 225   /* else if we don't share this, pretend successful lock */
 226
 227   return CURLSHE_OK;
 228 }
 229
 230 CURLSHcode
 231 Curl_share_unlock(struct Curl_easy *data, curl_lock_data type)
 232 {
 233   struct Curl_share *share = data->share;
 234
 235   if(share == NULL)
 236     return CURLSHE_INVALID;
 237
 238   if(share->specifier & (1<<type)) {
 239     if(share->unlockfunc) /* only call this if set! */
 240       share->unlockfunc (data, type, share->clientdata);
 241   }
 242
 243   return CURLSHE_OK;
 244 }