lib/share.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2015, 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 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     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(CURLSH *sh, CURLSHoption option, ...)
  53 {
  54   struct Curl_share *share = (struct Curl_share *)sh;
  55   va_list param;
  56   int type;
  57   curl_lock_function lockfunc;
  58   curl_unlock_function unlockfunc;
  59   void *ptr;
  60   CURLSHcode res = CURLSHE_OK;
  61
  62   if(share->dirty)
  63     /* don't allow setting options while one or more handles are already
  64        using this share */
  65     return CURLSHE_IN_USE;
  66
  67   va_start(param, option);
  68
  69   switch(option) {
  70   case CURLSHOPT_SHARE:
  71     /* this is a type this share will share */
  72     type = va_arg(param, int);
  73     share->specifier |= (1<<type);
  74     switch( type ) {
  75     case CURL_LOCK_DATA_DNS:
  76       break;
  77
  78     case CURL_LOCK_DATA_COOKIE:
  79 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
  80       if(!share->cookies) {
  81         share->cookies = Curl_cookie_init(NULL, NULL, NULL, TRUE );
  82         if(!share->cookies)
  83           res = CURLSHE_NOMEM;
  84       }
  85 #else   /* CURL_DISABLE_HTTP */
  86       res = CURLSHE_NOT_BUILT_IN;
  87 #endif
  88       break;
  89
  90     case CURL_LOCK_DATA_SSL_SESSION:
  91 #ifdef USE_SSL
  92       if(!share->sslsession) {
  93         share->max_ssl_sessions = 8;
  94         share->sslsession = calloc(share->max_ssl_sessions,
  95                                    sizeof(struct curl_ssl_session));
  96         share->sessionage = 0;
  97         if(!share->sslsession)
  98           res = CURLSHE_NOMEM;
  99       }
 100 #else
 101       res = CURLSHE_NOT_BUILT_IN;
 102 #endif
 103       break;
 104
 105     case CURL_LOCK_DATA_CONNECT:     /* not supported (yet) */
 106       break;
 107
 108     default:
 109       res = CURLSHE_BAD_OPTION;
 110     }
 111     break;
 112
 113   case CURLSHOPT_UNSHARE:
 114     /* this is a type this share will no longer share */
 115     type = va_arg(param, int);
 116     share->specifier &= ~(1<<type);
 117     switch( type ) {
 118     case CURL_LOCK_DATA_DNS:
 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 #else   /* CURL_DISABLE_HTTP */
 128       res = CURLSHE_NOT_BUILT_IN;
 129 #endif
 130       break;
 131
 132     case CURL_LOCK_DATA_SSL_SESSION:
 133 #ifdef USE_SSL
 134       Curl_safefree(share->sslsession);
 135 #else
 136       res = CURLSHE_NOT_BUILT_IN;
 137 #endif
 138       break;
 139
 140     case CURL_LOCK_DATA_CONNECT:
 141       break;
 142
 143     default:
 144       res = CURLSHE_BAD_OPTION;
 145       break;
 146     }
 147     break;
 148
 149   case CURLSHOPT_LOCKFUNC:
 150     lockfunc = va_arg(param, curl_lock_function);
 151     share->lockfunc = lockfunc;
 152     break;
 153
 154   case CURLSHOPT_UNLOCKFUNC:
 155     unlockfunc = va_arg(param, curl_unlock_function);
 156     share->unlockfunc = unlockfunc;
 157     break;
 158
 159   case CURLSHOPT_USERDATA:
 160     ptr = va_arg(param, void *);
 161     share->clientdata = ptr;
 162     break;
 163
 164   default:
 165     res = CURLSHE_BAD_OPTION;
 166     break;
 167   }
 168
 169   va_end(param);
 170
 171   return res;
 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   Curl_hash_destroy(&share->hostcache);
 193
 194 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 195   Curl_cookie_cleanup(share->cookies);
 196 #endif
 197
 198 #ifdef USE_SSL
 199   if(share->sslsession) {
 200     size_t i;
 201     for(i = 0; i < share->max_ssl_sessions; i++)
 202       Curl_ssl_kill_session(&(share->sslsession[i]));
 203     free(share->sslsession);
 204   }
 205 #endif
 206
 207   if(share->unlockfunc)
 208     share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 209   free(share);
 210
 211   return CURLSHE_OK;
 212 }
 213
 214
 215 CURLSHcode
 216 Curl_share_lock(struct SessionHandle *data, curl_lock_data type,
 217                 curl_lock_access accesstype)
 218 {
 219   struct Curl_share *share = data->share;
 220
 221   if(share == NULL)
 222     return CURLSHE_INVALID;
 223
 224   if(share->specifier & (1<<type)) {
 225     if(share->lockfunc) /* only call this if set! */
 226       share->lockfunc(data, type, accesstype, share->clientdata);
 227   }
 228   /* else if we don't share this, pretend successful lock */
 229
 230   return CURLSHE_OK;
 231 }
 232
 233 CURLSHcode
 234 Curl_share_unlock(struct SessionHandle *data, curl_lock_data type)
 235 {
 236   struct Curl_share *share = data->share;
 237
 238   if(share == NULL)
 239     return CURLSHE_INVALID;
 240
 241   if(share->specifier & (1<<type)) {
 242     if(share->unlockfunc) /* only call this if set! */
 243       share->unlockfunc (data, type, share->clientdata);
 244   }
 245
 246   return CURLSHE_OK;
 247 }