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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2004 James Yonan <jim@yonan.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef WIN32
#include "config-win32.h"
#else
#include "config.h"
#endif
#ifdef USE_PTHREAD
#include "syshead.h"
#include "thread.h"
#include "buffer.h"
#include "common.h"
#include "error.h"
#include "crypto.h"
#include "memdbg.h"
#if defined(USE_CRYPTO) && defined(USE_SSL)
static pthread_mutex_t *ssl_lock_cs;
static long *ssl_lock_count;
static void
ssl_pthreads_locking_callback (int mode, int type, char *file, int line)
{
msg (D_OPENSSL_LOCK, "SSL LOCK thread=%4lu mode=%s lock=%s %s:%d",
CRYPTO_thread_id (),
(mode & CRYPTO_LOCK) ? "l" : "u",
(type & CRYPTO_READ) ? "r" : "w", file, line);
if (mode & CRYPTO_LOCK)
{
pthread_mutex_lock (&(ssl_lock_cs[type]));
ssl_lock_count[type]++;
}
else
{
pthread_mutex_unlock (&(ssl_lock_cs[type]));
}
}
static unsigned long
ssl_pthreads_thread_id (void)
{
unsigned long ret;
ret = (unsigned long) pthread_self ();
return ret;
}
static void
ssl_thread_setup (void)
{
int i;
ssl_lock_cs = OPENSSL_malloc (CRYPTO_num_locks () * sizeof (pthread_mutex_t));
ssl_lock_count = OPENSSL_malloc (CRYPTO_num_locks () * sizeof (long));
for (i = 0; i < CRYPTO_num_locks (); i++)
{
ssl_lock_count[i] = 0;
pthread_mutex_init (&(ssl_lock_cs[i]), NULL);
}
CRYPTO_set_id_callback ((unsigned long (*)(void)) ssl_pthreads_thread_id);
CRYPTO_set_locking_callback ((void (*)(int, int, const char*, int)) ssl_pthreads_locking_callback);
}
static void
ssl_thread_cleanup (void)
{
int i;
msg (D_OPENSSL_LOCK, "SSL LOCK cleanup");
CRYPTO_set_locking_callback (NULL);
for (i = 0; i < CRYPTO_num_locks (); i++)
pthread_mutex_destroy (&(ssl_lock_cs[i]));
OPENSSL_free (ssl_lock_cs);
OPENSSL_free (ssl_lock_count);
}
#endif /* defined(USE_CRYPTO) && defined(USE_SSL) */
pthread_t x_main_thread_id;
pthread_t x_work_thread_id;
pthread_mutex_t x_lock_cs[N_MUTEXES];
bool x_lock_cs_init;
void
work_thread_create (void *(*start_routine) (void *), void* arg)
{
ASSERT (x_main_thread_id);
ASSERT (!x_work_thread_id);
ASSERT (!pthread_create (&x_work_thread_id, NULL, start_routine, arg));
msg (D_THREAD_DEBUG, "CREATE THREAD ID=%lu", (unsigned long)x_work_thread_id);
}
void
work_thread_join ()
{
if (x_work_thread_id)
{
pthread_join (x_work_thread_id, NULL);
x_work_thread_id = 0;
}
}
void
thread_init ()
{
int i;
ASSERT (!x_main_thread_id);
ASSERT (!x_work_thread_id);
msg (M_INFO, "PTHREAD support initialized");
x_main_thread_id = pthread_self ();
/* initialize OpenSSL library locking */
#if defined(USE_CRYPTO) && defined(USE_SSL)
ssl_thread_setup();
#endif
/* initialize static mutexes */
ASSERT (!x_lock_cs_init);
for (i = 0; i < N_MUTEXES; i++)
ASSERT (!pthread_mutex_init (&(x_lock_cs[i]), NULL));
x_lock_cs_init = true;
}
void
thread_cleanup ()
{
ASSERT (!x_work_thread_id);
if (x_main_thread_id)
{
int i;
/* cleanup OpenSSL library locking */
#if defined(USE_CRYPTO) && defined(USE_SSL)
ssl_thread_cleanup();
#endif
/* destroy static mutexes */
if (x_lock_cs_init)
{
x_lock_cs_init = false;
for (i = 0; i < N_MUTEXES; i++)
ASSERT (!pthread_mutex_destroy (&(x_lock_cs[i])));
}
x_main_thread_id = 0;
}
}
#else
static void dummy(void) {}
#endif
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