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         share->sessionage = 0;
  95         if(!share->sslsession)
  96           return CURLSHE_NOMEM;
  97       }
  98       break;
  99 #else
 100       return CURLSHE_NOT_BUILT_IN;
 101 #endif
 102
 103     case CURL_LOCK_DATA_CONNECT:     /* not supported (yet) */
 104
 105     default:
 106       return CURLSHE_BAD_OPTION;
 107     }
 108     break;
 109
 110   case CURLSHOPT_UNSHARE:
 111     /* this is a type this share will no longer share */
 112     type = va_arg(param, int);
 113     share->specifier &= ~(1<<type);
 114     switch( type ) {
 115     case CURL_LOCK_DATA_DNS:
 116       if(share->hostcache) {
 117         Curl_hash_destroy(share->hostcache);
 118         share->hostcache = NULL;
 119       }
 120       break;
 121
 122     case CURL_LOCK_DATA_COOKIE:
 123 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 124       if(share->cookies) {
 125         Curl_cookie_cleanup(share->cookies);
 126         share->cookies = NULL;
 127       }
 128       break;
 129 #else   /* CURL_DISABLE_HTTP */
 130       return CURLSHE_NOT_BUILT_IN;
 131 #endif
 132
 133     case CURL_LOCK_DATA_SSL_SESSION:
 134 #ifdef USE_SSL
 135       if(share->sslsession) {
 136         free(share->sslsession);
 137         share->sslsession = NULL;
 138         share->nsslsession = 0;
 139       }
 140       break;
 141 #else
 142       return CURLSHE_NOT_BUILT_IN;
 143 #endif
 144
 145     case CURL_LOCK_DATA_CONNECT:
 146       break;
 147
 148     default:
 149       return CURLSHE_BAD_OPTION;
 150     }
 151     break;
 152
 153   case CURLSHOPT_LOCKFUNC:
 154     lockfunc = va_arg(param, curl_lock_function);
 155     share->lockfunc = lockfunc;
 156     break;
 157
 158   case CURLSHOPT_UNLOCKFUNC:
 159     unlockfunc = va_arg(param, curl_unlock_function);
 160     share->unlockfunc = unlockfunc;
 161     break;
 162
 163   case CURLSHOPT_USERDATA:
 164     ptr = va_arg(param, void *);
 165     share->clientdata = ptr;
 166     break;
 167
 168   default:
 169     return CURLSHE_BAD_OPTION;
 170   }
 171
 172   return CURLSHE_OK;
 173 }
 174
 175 CURLSHcode
 176 curl_share_cleanup(CURLSH *sh)
 177 {
 178   struct Curl_share *share = (struct Curl_share *)sh;
 179
 180   if(share == NULL)
 181     return CURLSHE_INVALID;
 182
 183   if(share->lockfunc)
 184     share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
 185                     share->clientdata);
 186
 187   if(share->dirty) {
 188     if(share->unlockfunc)
 189       share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 190     return CURLSHE_IN_USE;
 191   }
 192
 193   if(share->hostcache) {
 194     Curl_hash_destroy(share->hostcache);
 195     share->hostcache = NULL;
 196   }
 197
 198 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 199   if(share->cookies)
 200     Curl_cookie_cleanup(share->cookies);
 201 #endif
 202
 203 #ifdef USE_SSL
 204   if(share->sslsession) {
 205     unsigned int i;
 206     for(i = 0; i < share->nsslsession; ++i)
 207       Curl_ssl_kill_session(&(share->sslsession[i]));
 208     free(share->sslsession);
 209   }
 210 #endif
 211
 212   if(share->unlockfunc)
 213     share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 214   free(share);
 215
 216   return CURLSHE_OK;
 217 }
 218
 219
 220 CURLSHcode
 221 Curl_share_lock(struct SessionHandle *data, curl_lock_data type,
 222                 curl_lock_access accesstype)
 223 {
 224   struct Curl_share *share = data->share;
 225
 226   if(share == NULL)
 227     return CURLSHE_INVALID;
 228
 229   if(share->specifier & (1<<type)) {
 230     if(share->lockfunc) /* only call this if set! */
 231       share->lockfunc(data, type, accesstype, share->clientdata);
 232   }
 233   /* else if we don't share this, pretend successful lock */
 234
 235   return CURLSHE_OK;
 236 }
 237
 238 CURLSHcode
 239 Curl_share_unlock(struct SessionHandle *data, curl_lock_data type)
 240 {
 241   struct Curl_share *share = data->share;
 242
 243   if(share == NULL)
 244     return CURLSHE_INVALID;
 245
 246   if(share->specifier & (1<<type)) {
 247     if(share->unlockfunc) /* only call this if set! */
 248       share->unlockfunc (data, type, share->clientdata);
 249   }
 250
 251   return CURLSHE_OK;
 252 }