lib/share.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2011, 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 "setup.h"
  24
  25 #include <curl/curl.h>
  26 #include "urldata.h"
  27 #include "share.h"
  28 #include "sslgen.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
  55   if(share->dirty)
  56     /* don't allow setting options while one or more handles are already
  57        using this share */
  58     return CURLSHE_IN_USE;
  59
  60   va_start(param, option);
  61
  62   switch(option) {
  63   case CURLSHOPT_SHARE:
  64     /* this is a type this share will share */
  65     type = va_arg(param, int);
  66     share->specifier |= (1<<type);
  67     switch( type ) {
  68     case CURL_LOCK_DATA_DNS:
  69       if(!share->hostcache) {
  70         share->hostcache = Curl_mk_dnscache();
  71         if(!share->hostcache)
  72           return CURLSHE_NOMEM;
  73       }
  74       break;
  75
  76     case CURL_LOCK_DATA_COOKIE:
  77 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
  78       if(!share->cookies) {
  79         share->cookies = Curl_cookie_init(NULL, NULL, NULL, TRUE );
  80         if(!share->cookies)
  81           return CURLSHE_NOMEM;
  82       }
  83       break;
  84 #else   /* CURL_DISABLE_HTTP */
  85       return CURLSHE_NOT_BUILT_IN;
  86 #endif
  87
  88     case CURL_LOCK_DATA_SSL_SESSION:
  89 #ifdef USE_SSL
  90       if(!share->sslsession) {
  91         share->nsslsession = 8;
  92         share->sslsession = calloc(share->nsslsession,
  93                                    sizeof(struct curl_ssl_session));
  94         if(!share->sslsession)
  95           return CURLSHE_NOMEM;
  96       }
  97       break;
  98 #else
  99       return CURLSHE_NOT_BUILT_IN;
 100 #endif
 101
 102     case CURL_LOCK_DATA_CONNECT:     /* not supported (yet) */
 103
 104     default:
 105       return CURLSHE_BAD_OPTION;
 106     }
 107     break;
 108
 109   case CURLSHOPT_UNSHARE:
 110     /* this is a type this share will no longer share */
 111     type = va_arg(param, int);
 112     share->specifier &= ~(1<<type);
 113     switch( type ) {
 114     case CURL_LOCK_DATA_DNS:
 115       if(share->hostcache) {
 116         Curl_hash_destroy(share->hostcache);
 117         share->hostcache = NULL;
 118       }
 119       break;
 120
 121     case CURL_LOCK_DATA_COOKIE:
 122 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 123       if(share->cookies) {
 124         Curl_cookie_cleanup(share->cookies);
 125         share->cookies = NULL;
 126       }
 127       break;
 128 #else   /* CURL_DISABLE_HTTP */
 129       return CURLSHE_NOT_BUILT_IN;
 130 #endif
 131
 132     case CURL_LOCK_DATA_SSL_SESSION:
 133 #ifdef USE_SSL
 134       if(share->sslsession) {
 135         free(share->sslsession);
 136         share->sslsession = NULL;
 137         share->nsslsession = 0;
 138       }
 139       break;
 140 #else
 141       return CURLSHE_NOT_BUILT_IN;
 142 #endif
 143
 144     case CURL_LOCK_DATA_CONNECT:
 145       break;
 146
 147     default:
 148       return CURLSHE_BAD_OPTION;
 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     return CURLSHE_BAD_OPTION;
 169   }
 170
 171   return CURLSHE_OK;
 172 }
 173
 174 CURLSHcode
 175 curl_share_cleanup(CURLSH *sh)
 176 {
 177   struct Curl_share *share = (struct Curl_share *)sh;
 178
 179   if(share == NULL)
 180     return CURLSHE_INVALID;
 181
 182   if(share->lockfunc)
 183     share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
 184                     share->clientdata);
 185
 186   if(share->dirty) {
 187     if(share->unlockfunc)
 188       share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 189     return CURLSHE_IN_USE;
 190   }
 191
 192   if(share->hostcache) {
 193     Curl_hash_destroy(share->hostcache);
 194     share->hostcache = NULL;
 195   }
 196
 197 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 198   if(share->cookies)
 199     Curl_cookie_cleanup(share->cookies);
 200 #endif
 201
 202 #ifdef USE_SSL
 203   if(share->sslsession) {
 204     unsigned int i;
 205     for(i = 0; i < share->nsslsession; ++i)
 206       Curl_ssl_kill_session(&(share->sslsession[i]));
 207     free(share->sslsession);
 208   }
 209 #endif
 210
 211   if(share->unlockfunc)
 212     share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 213   free(share);
 214
 215   return CURLSHE_OK;
 216 }
 217
 218
 219 CURLSHcode
 220 Curl_share_lock(struct SessionHandle *data, curl_lock_data type,
 221                 curl_lock_access accesstype)
 222 {
 223   struct Curl_share *share = data->share;
 224
 225   if(share == NULL)
 226     return CURLSHE_INVALID;
 227
 228   if(share->specifier & (1<<type)) {
 229     if(share->lockfunc) /* only call this if set! */
 230       share->lockfunc(data, type, accesstype, share->clientdata);
 231   }
 232   /* else if we don't share this, pretend successful lock */
 233
 234   return CURLSHE_OK;
 235 }
 236
 237 CURLSHcode
 238 Curl_share_unlock(struct SessionHandle *data, curl_lock_data type)
 239 {
 240   struct Curl_share *share = data->share;
 241
 242   if(share == NULL)
 243     return CURLSHE_INVALID;
 244
 245   if(share->specifier & (1<<type)) {
 246     if(share->unlockfunc) /* only call this if set! */
 247       share->unlockfunc (data, type, share->clientdata);
 248   }
 249
 250   return CURLSHE_OK;
 251 }