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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) 2002-2008 OpenVPN Technologies, Inc. <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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
*/
#include "syshead.h"
#ifdef USE_PTHREAD
#include "thread.h"
#include "buffer.h"
#include "common.h"
#include "error.h"
#include "crypto.h"
#include "memdbg.h"
static struct sparse_mutex *ssl_mutex; /* GLOBAL */
static void
ssl_pthreads_locking_callback (int mode, int type, char *file, int line)
{
dmsg (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_mutex[type].mutex);
else
pthread_mutex_unlock (&ssl_mutex[type].mutex);
}
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;
#error L_MSG needs to be initialized as a recursive mutex
ssl_mutex = OPENSSL_malloc (CRYPTO_num_locks () * sizeof (struct sparse_mutex));
for (i = 0; i < CRYPTO_num_locks (); i++)
pthread_mutex_init (&ssl_mutex[i].mutex, 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;
dmsg (D_OPENSSL_LOCK, "SSL LOCK cleanup");
CRYPTO_set_locking_callback (NULL);
for (i = 0; i < CRYPTO_num_locks (); i++)
pthread_mutex_destroy (&ssl_mutex[i].mutex);
OPENSSL_free (ssl_mutex);
}
struct sparse_mutex mutex_array[N_MUTEXES]; /* GLOBAL */
bool pthread_initialized; /* GLOBAL */
openvpn_thread_t
openvpn_thread_create (void *(*start_routine) (void *), void* arg)
{
openvpn_thread_t ret;
ASSERT (pthread_initialized);
ASSERT (!pthread_create (&ret, NULL, start_routine, arg));
dmsg (D_THREAD_DEBUG, "CREATE THREAD ID=%lu", (unsigned long)ret);
return ret;
}
void
openvpn_thread_join (openvpn_thread_t id)
{
ASSERT (pthread_initialized);
pthread_join (id, NULL);
}
void
openvpn_thread_init ()
{
int i;
ASSERT (!pthread_initialized);
msg (M_INFO, "PTHREAD support initialized");
/* initialize OpenSSL library locking */
#if defined(USE_CRYPTO) && defined(USE_SSL)
ssl_thread_setup();
#endif
/* initialize static mutexes */
for (i = 0; i < N_MUTEXES; i++)
ASSERT (!pthread_mutex_init (&mutex_array[i].mutex, NULL));
msg_thread_init ();
pthread_initialized = true;
}
void
openvpn_thread_cleanup ()
{
if (pthread_initialized)
{
int i;
pthread_initialized = false;
/* cleanup OpenSSL library locking */
#if defined(USE_CRYPTO) && defined(USE_SSL)
ssl_thread_cleanup();
#endif
/* destroy static mutexes */
for (i = 0; i < N_MUTEXES; i++)
ASSERT (!pthread_mutex_destroy (&mutex_array[i].mutex));
msg_thread_uninit ();
}
}
#else
static void dummy(void) {}
#endif
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