lib/share.c

   1 /***************************************************************************
   2  *                                  _   _ ____  _
   3  *  Project                     ___| | | |  _ \| |
   4  *                             / __| | | | |_) | |
   5  *                            | (__| |_| |  _ <| |___
   6  *                             \___|\___/|_| \_\_____|
   7  *
   8  * Copyright (C) 1998 - 2017, 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       if(Curl_conncache_init(&share->conn_cache, 103))
 106         res = CURLSHE_NOMEM;
 107       break;
 108
 109     default:
 110       res = CURLSHE_BAD_OPTION;
 111     }
 112     break;
 113
 114   case CURLSHOPT_UNSHARE:
 115     /* this is a type this share will no longer share */
 116     type = va_arg(param, int);
 117     share->specifier &= ~(1<<type);
 118     switch(type) {
 119     case CURL_LOCK_DATA_DNS:
 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 #else   /* CURL_DISABLE_HTTP */
 129       res = CURLSHE_NOT_BUILT_IN;
 130 #endif
 131       break;
 132
 133     case CURL_LOCK_DATA_SSL_SESSION:
 134 #ifdef USE_SSL
 135       Curl_safefree(share->sslsession);
 136 #else
 137       res = CURLSHE_NOT_BUILT_IN;
 138 #endif
 139       break;
 140
 141     case CURL_LOCK_DATA_CONNECT:
 142       break;
 143
 144     default:
 145       res = CURLSHE_BAD_OPTION;
 146       break;
 147     }
 148     break;
 149
 150   case CURLSHOPT_LOCKFUNC:
 151     lockfunc = va_arg(param, curl_lock_function);
 152     share->lockfunc = lockfunc;
 153     break;
 154
 155   case CURLSHOPT_UNLOCKFUNC:
 156     unlockfunc = va_arg(param, curl_unlock_function);
 157     share->unlockfunc = unlockfunc;
 158     break;
 159
 160   case CURLSHOPT_USERDATA:
 161     ptr = va_arg(param, void *);
 162     share->clientdata = ptr;
 163     break;
 164
 165   default:
 166     res = CURLSHE_BAD_OPTION;
 167     break;
 168   }
 169
 170   va_end(param);
 171
 172   return res;
 173 }
 174
 175 CURLSHcode
 176 curl_share_cleanup(struct Curl_share *share)
 177 {
 178   if(share == NULL)
 179     return CURLSHE_INVALID;
 180
 181   if(share->lockfunc)
 182     share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,
 183                     share->clientdata);
 184
 185   if(share->dirty) {
 186     if(share->unlockfunc)
 187       share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 188     return CURLSHE_IN_USE;
 189   }
 190
 191   Curl_conncache_close_all_connections(&share->conn_cache);
 192   Curl_conncache_destroy(&share->conn_cache);
 193   Curl_hash_destroy(&share->hostcache);
 194
 195 #if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)
 196   Curl_cookie_cleanup(share->cookies);
 197 #endif
 198
 199 #ifdef USE_SSL
 200   if(share->sslsession) {
 201     size_t i;
 202     for(i = 0; i < share->max_ssl_sessions; i++)
 203       Curl_ssl_kill_session(&(share->sslsession[i]));
 204     free(share->sslsession);
 205   }
 206 #endif
 207
 208   if(share->unlockfunc)
 209     share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);
 210   free(share);
 211
 212   return CURLSHE_OK;
 213 }
 214
 215
 216 CURLSHcode
 217 Curl_share_lock(struct Curl_easy *data, curl_lock_data type,
 218                 curl_lock_access accesstype)
 219 {
 220   struct Curl_share *share = data->share;
 221
 222   if(share == NULL)
 223     return CURLSHE_INVALID;
 224
 225   if(share->specifier & (1<<type)) {
 226     if(share->lockfunc) /* only call this if set! */
 227       share->lockfunc(data, type, accesstype, share->clientdata);
 228   }
 229   /* else if we don't share this, pretend successful lock */
 230
 231   return CURLSHE_OK;
 232 }
 233
 234 CURLSHcode
 235 Curl_share_unlock(struct Curl_easy *data, curl_lock_data type)
 236 {
 237   struct Curl_share *share = data->share;
 238
 239   if(share == NULL)
 240     return CURLSHE_INVALID;
 241
 242   if(share->specifier & (1<<type)) {
 243     if(share->unlockfunc) /* only call this if set! */
 244       share->unlockfunc (data, type, share->clientdata);
 245   }
 246
 247   return CURLSHE_OK;
 248 }