/***************************************************************************

 *                                  _   _ ____  _

 *  Project                     ___| | | |  _ \| |

 *                             / __| | | | |_) | |

 *                            | (__| |_| |  _ <| |___

 *                             \___|\___/|_| \_\_____|

 *

 * Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.

 *

 * This software is licensed as described in the file COPYING, which

 * you should have received as part of this distribution. The terms

 * are also available at https://curl.se/docs/copyright.html.

 *

 * You may opt to use, copy, modify, merge, publish, distribute and/or sell

 * copies of the Software, and permit persons to whom the Software is

 * furnished to do so, under the terms of the COPYING file.

 *

 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY

 * KIND, either express or implied.

 *

 * SPDX-License-Identifier: curl

 *

 ***************************************************************************/

#include "curl_setup.h"

#include <curl/curl.h>

#include "urldata.h"

#include "share.h"

#include "psl.h"

#include "vtls/vtls.h"

#include "curl_memory.h"

/* The last #include file should be: */

#include "memdebug.h"

struct Curl_share *

curl_share_init(void)

{

  struct Curl_share *share = calloc(1, sizeof(struct Curl_share));

  if(share) {

    share->magic = CURL_GOOD_SHARE;

    share->specifier |= (1<<CURL_LOCK_DATA_SHARE);

    Curl_init_dnscache(&share->hostcache, 23);

  }

  return share;

}

#undef curl_share_setopt

CURLSHcode

curl_share_setopt(struct Curl_share *share, CURLSHoption option, ...)

{

  va_list param;

  int type;

  curl_lock_function lockfunc;

  curl_unlock_function unlockfunc;

  void *ptr;

  CURLSHcode res = CURLSHE_OK;

  if(!GOOD_SHARE_HANDLE(share))

    return CURLSHE_INVALID;

  if(share->dirty)

    /* don't allow setting options while one or more handles are already

       using this share */

    return CURLSHE_IN_USE;

  va_start(param, option);

  switch(option) {

  case CURLSHOPT_SHARE:

    /* this is a type this share will share */

    type = va_arg(param, int);

    switch(type) {

    case CURL_LOCK_DATA_DNS:

      break;

    case CURL_LOCK_DATA_COOKIE:

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)

      if(!share->cookies) {

        share->cookies = Curl_cookie_init(NULL, NULL, NULL, TRUE);

        if(!share->cookies)

          res = CURLSHE_NOMEM;

      }

#else   /* CURL_DISABLE_HTTP */

      res = CURLSHE_NOT_BUILT_IN;

#endif

      break;

    case CURL_LOCK_DATA_SSL_SESSION:

#ifdef USE_SSL

      if(!share->sslsession) {

        share->max_ssl_sessions = 8;

        share->sslsession = calloc(share->max_ssl_sessions,

                                   sizeof(struct Curl_ssl_session));

        share->sessionage = 0;

        if(!share->sslsession)

          res = CURLSHE_NOMEM;

      }

#else

      res = CURLSHE_NOT_BUILT_IN;

#endif

      break;

    case CURL_LOCK_DATA_CONNECT:

      if(Curl_conncache_init(&share->conn_cache, 103))

        res = CURLSHE_NOMEM;

      break;

    case CURL_LOCK_DATA_PSL:

#ifndef USE_LIBPSL

      res = CURLSHE_NOT_BUILT_IN;

#endif

      break;

    default:

      res = CURLSHE_BAD_OPTION;

    }

    if(!res)

      share->specifier |= (1<<type);

    break;

  case CURLSHOPT_UNSHARE:

    /* this is a type this share will no longer share */

    type = va_arg(param, int);

    share->specifier &= ~(1<<type);

    switch(type) {

    case CURL_LOCK_DATA_DNS:

      break;

    case CURL_LOCK_DATA_COOKIE:

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)

      if(share->cookies) {

        Curl_cookie_cleanup(share->cookies);

        share->cookies = NULL;

      }

#else   /* CURL_DISABLE_HTTP */

      res = CURLSHE_NOT_BUILT_IN;

#endif

      break;

    case CURL_LOCK_DATA_SSL_SESSION:

#ifdef USE_SSL

      Curl_safefree(share->sslsession);

#else

      res = CURLSHE_NOT_BUILT_IN;

#endif

      break;

    case CURL_LOCK_DATA_CONNECT:

      break;

    default:

      res = CURLSHE_BAD_OPTION;

      break;

    }

    break;

  case CURLSHOPT_LOCKFUNC:

    lockfunc = va_arg(param, curl_lock_function);

    share->lockfunc = lockfunc;

    break;

  case CURLSHOPT_UNLOCKFUNC:

    unlockfunc = va_arg(param, curl_unlock_function);

    share->unlockfunc = unlockfunc;

    break;

  case CURLSHOPT_USERDATA:

    ptr = va_arg(param, void *);

    share->clientdata = ptr;

    break;

  default:

    res = CURLSHE_BAD_OPTION;

    break;

  }

  va_end(param);

  return res;

}

CURLSHcode

curl_share_cleanup(struct Curl_share *share)

{

  if(!GOOD_SHARE_HANDLE(share))

    return CURLSHE_INVALID;

  if(share->lockfunc)

    share->lockfunc(NULL, CURL_LOCK_DATA_SHARE, CURL_LOCK_ACCESS_SINGLE,

                    share->clientdata);

  if(share->dirty) {

    if(share->unlockfunc)

      share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);

    return CURLSHE_IN_USE;

  }

  Curl_conncache_close_all_connections(&share->conn_cache);

  Curl_conncache_destroy(&share->conn_cache);

  Curl_hash_destroy(&share->hostcache);

#if !defined(CURL_DISABLE_HTTP) && !defined(CURL_DISABLE_COOKIES)

  Curl_cookie_cleanup(share->cookies);

#endif

#ifdef USE_SSL

  if(share->sslsession) {

    size_t i;

    for(i = 0; i < share->max_ssl_sessions; i++)

      Curl_ssl_kill_session(&(share->sslsession[i]));

    free(share->sslsession);

  }

#endif

  Curl_psl_destroy(&share->psl);

  if(share->unlockfunc)

    share->unlockfunc(NULL, CURL_LOCK_DATA_SHARE, share->clientdata);

  share->magic = 0;

  free(share);

  return CURLSHE_OK;

}

CURLSHcode

Curl_share_lock(struct Curl_easy *data, curl_lock_data type,

                curl_lock_access accesstype)

{

  struct Curl_share *share = data->share;

  if(!share)

    return CURLSHE_INVALID;

  if(share->specifier & (1<<type)) {

    if(share->lockfunc) /* only call this if set! */

      share->lockfunc(data, type, accesstype, share->clientdata);

  }

  /* else if we don't share this, pretend successful lock */

  return CURLSHE_OK;

}

CURLSHcode

Curl_share_unlock(struct Curl_easy *data, curl_lock_data type)

{

  struct Curl_share *share = data->share;

  if(!share)

    return CURLSHE_INVALID;

  if(share->specifier & (1<<type)) {

    if(share->unlockfunc) /* only call this if set! */

      share->unlockfunc (data, type, share->clientdata);

  }

  return CURLSHE_OK;

}