lib/share.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2013, 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 http://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 CURLSH *
  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   return share;
  42 }
  43
  44 #undef curl_share_setopt
  45 CURLSHcode
  46 curl_share_setopt(CURLSH *sh, CURLSHoption option, ...)
  47 {
  48   struct Curl_share *share = (struct Curl_share *)sh;
  49   va_list param;
  50   int type;
  51   curl_lock_function lockfunc;
  52   curl_unlock_function unlockfunc;
  53   void *ptr;
  54   CURLSHcode res = CURLSHE_OK;
  55
  56   if(share->dirty)
  57     /* don't allow setting options while one or more handles are already
  58        using this share */
  59     return CURLSHE_IN_USE;
  60
  61   va_start(param, option);
  62
  63   switch(option) {
  64   case CURLSHOPT_SHARE:
  65     /* this is a type this share will share */
  66     type = va_arg(param, int);
  67     share->specifier |= (1<<type);
  68     switch( type ) {
  69     case CURL_LOCK_DATA_DNS:
  70       if(!share->hostcache) {
  71         share->hostcache = Curl_mk_dnscache();
  72         if(!share->hostcache)
  73           res = CURLSHE_NOMEM;
  74       }
  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       if(share->hostcache) {
 119         Curl_hash_destroy(share->hostcache);
 120         share->hostcache = NULL;
 121       }
 122       break;
 123
 124     case CURL_LOCK_DATA_COOKIE:
 125 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 126       if(share->cookies) {
 127         Curl_cookie_cleanup(share->cookies);
 128         share->cookies = NULL;
 129       }
 130 #else   /* CURL_DISABLE_HTTP */
 131       res = CURLSHE_NOT_BUILT_IN;
 132 #endif
 133       break;
 134
 135     case CURL_LOCK_DATA_SSL_SESSION:
 136 #ifdef USE_SSL
 137       Curl_safefree(share->sslsession);
 138 #else
 139       res = CURLSHE_NOT_BUILT_IN;
 140 #endif
 141       break;
 142
 143     case CURL_LOCK_DATA_CONNECT:
 144       break;
 145
 146     default:
 147       res = CURLSHE_BAD_OPTION;
 148       break;
 149     }
 150     break;
 151
 152   case CURLSHOPT_LOCKFUNC:
 153     lockfunc = va_arg(param, curl_lock_function);
 154     share->lockfunc = lockfunc;
 155     break;
 156
 157   case CURLSHOPT_UNLOCKFUNC:
 158     unlockfunc = va_arg(param, curl_unlock_function);
 159     share->unlockfunc = unlockfunc;
 160     break;
 161
 162   case CURLSHOPT_USERDATA:
 163     ptr = va_arg(param, void *);
 164     share->clientdata = ptr;
 165     break;
 166
 167   default:
 168     res = CURLSHE_BAD_OPTION;
 169     break;
 170   }
 171
 172   va_end(param);
 173
 174   return res;
 175 }
 176
 177 CURLSHcode
 178 curl_share_cleanup(CURLSH *sh)
 179 {
 180   struct Curl_share *share = (struct Curl_share *)sh;
 181
 182   if(share == NULL)
 183     return CURLSHE_INVALID;
 184
 185   if(share->lockfunc)
 186     share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
 187                     share->clientdata);
 188
 189   if(share->dirty) {
 190     if(share->unlockfunc)
 191       share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 192     return CURLSHE_IN_USE;
 193   }
 194
 195   if(share->hostcache) {
 196     Curl_hash_destroy(share->hostcache);
 197     share->hostcache = NULL;
 198   }
 199
 200 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 201   if(share->cookies)
 202     Curl_cookie_cleanup(share->cookies);
 203 #endif
 204
 205 #ifdef USE_SSL
 206   if(share->sslsession) {
 207     size_t i;
 208     for(i = 0; i < share->max_ssl_sessions; i++)
 209       Curl_ssl_kill_session(&(share->sslsession[i]));
 210     free(share->sslsession);
 211   }
 212 #endif
 213
 214   if(share->unlockfunc)
 215     share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 216   free(share);
 217
 218   return CURLSHE_OK;
 219 }
 220
 221
 222 CURLSHcode
 223 Curl_share_lock(struct SessionHandle *data, curl_lock_data type,
 224                 curl_lock_access accesstype)
 225 {
 226   struct Curl_share *share = data->share;
 227
 228   if(share == NULL)
 229     return CURLSHE_INVALID;
 230
 231   if(share->specifier & (1<<type)) {
 232     if(share->lockfunc) /* only call this if set! */
 233       share->lockfunc(data, type, accesstype, share->clientdata);
 234   }
 235   /* else if we don't share this, pretend successful lock */
 236
 237   return CURLSHE_OK;
 238 }
 239
 240 CURLSHcode
 241 Curl_share_unlock(struct SessionHandle *data, curl_lock_data type)
 242 {
 243   struct Curl_share *share = data->share;
 244
 245   if(share == NULL)
 246     return CURLSHE_INVALID;
 247
 248   if(share->specifier & (1<<type)) {
 249     if(share->unlockfunc) /* only call this if set! */
 250       share->unlockfunc (data, type, share->clientdata);
 251   }
 252
 253   return CURLSHE_OK;
 254 }