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/*
* Copyright (C) 2010 Free Software Foundation, Inc.
*
* Author: Nikos Mavrogiannopoulos
*
* This file is part of GnuTLS.
*
* The GnuTLS is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA
*
*/
#include <system.h>
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <errno.h>
#ifdef _WIN32
#include <windows.h>
#else
#ifdef HAVE_PTHREAD_LOCKS
#include <pthread.h>
#endif
#endif
/* We need to disable gnulib's replacement wrappers to get native
Windows interfaces. */
#undef recv
#undef send
/* System specific function wrappers.
*/
/* wrappers for write() and writev()
*/
#ifdef _WIN32
int
system_errno (gnutls_transport_ptr p)
{
int tmperr = WSAGetLastError ();
int ret = 0;
switch (tmperr)
{
case WSAEWOULDBLOCK:
ret = EAGAIN;
break;
case WSAEINTR:
ret = EINTR;
break;
default:
ret = EIO;
break;
}
WSASetLastError (tmperr);
return ret;
}
ssize_t
system_write (gnutls_transport_ptr ptr, const void *data, size_t data_size)
{
return send (GNUTLS_POINTER_TO_INT (ptr), data, data_size, 0);
}
#else /* POSIX */
int
system_errno (gnutls_transport_ptr ptr)
{
return errno;
}
ssize_t
system_writev (gnutls_transport_ptr ptr, const giovec_t * iovec,
int iovec_cnt)
{
return writev (GNUTLS_POINTER_TO_INT (ptr), (struct iovec *) iovec,
iovec_cnt);
}
#endif
ssize_t
system_read (gnutls_transport_ptr ptr, void *data, size_t data_size)
{
return recv (GNUTLS_POINTER_TO_INT (ptr), data, data_size, 0);
}
ssize_t
system_read_peek (gnutls_transport_ptr ptr, void *data, size_t data_size)
{
return recv (GNUTLS_POINTER_TO_INT (ptr), data, data_size, MSG_PEEK);
}
/* Thread stuff */
#ifdef HAVE_WIN32_LOCKS
/* FIXME: win32 locks are untested */
static int
gnutls_system_mutex_init (void **priv)
{
CRITICAL_SECTION *lock = malloc (sizeof (CRITICAL_SECTION));
if (lock == NULL)
return GNUTLS_E_MEMORY_ERROR;
InitializeCriticalSection (lock);
*priv = lock;
return 0;
}
static int
gnutls_system_mutex_deinit (void **priv)
{
DeleteCriticalSection ((CRITICAL_SECTION *) * priv);
free (*priv);
return 0;
}
static int
gnutls_system_mutex_lock (void **priv)
{
EnterCriticalSection ((CRITICAL_SECTION *) * priv);
return 0;
}
static int
gnutls_system_mutex_unlock (void **priv)
{
LeaveCriticalSection ((CRITICAL_SECTION *) * priv);
return 0;
}
int
_gnutls_atfork (void (*prepare) (void), void (*parent) (void),
void (*child) (void))
{
return 0;
}
#endif /* WIN32_LOCKS */
#ifdef HAVE_PTHREAD_LOCKS
static int
gnutls_system_mutex_init (void **priv)
{
pthread_mutex_t *lock = malloc (sizeof (pthread_mutex_t));
int ret;
if (lock == NULL)
return GNUTLS_E_MEMORY_ERROR;
ret = pthread_mutex_init (lock, NULL);
if (ret)
{
free (lock);
gnutls_assert ();
return GNUTLS_E_LOCKING_ERROR;
}
*priv = lock;
return 0;
}
static int
gnutls_system_mutex_deinit (void **priv)
{
pthread_mutex_destroy ((pthread_mutex_t *) * priv);
free (*priv);
return 0;
}
static int
gnutls_system_mutex_lock (void **priv)
{
if (pthread_mutex_lock ((pthread_mutex_t *) * priv))
{
gnutls_assert ();
return GNUTLS_E_LOCKING_ERROR;
}
return 0;
}
static int
gnutls_system_mutex_unlock (void **priv)
{
if (pthread_mutex_unlock ((pthread_mutex_t *) * priv))
{
gnutls_assert ();
return GNUTLS_E_LOCKING_ERROR;
}
return 0;
}
int
_gnutls_atfork (void (*prepare) (void), void (*parent) (void),
void (*child) (void))
{
return pthread_atfork (prepare, parent, child);
}
#endif /* PTHREAD_LOCKS */
#ifdef HAVE_NO_LOCKS
static int
gnutls_system_mutex_init (void **priv)
{
return 0;
}
static int
gnutls_system_mutex_deinit (void **priv)
{
return 0;
}
static int
gnutls_system_mutex_lock (void **priv)
{
return 0;
}
static int
gnutls_system_mutex_unlock (void **priv)
{
return 0;
}
int
_gnutls_atfork (void (*prepare) (void), void (*parent) (void),
void (*child) (void))
{
return 0;
}
#endif /* NO_LOCKS */
gnutls_time_func gnutls_time = time;
mutex_init_func gnutls_mutex_init = gnutls_system_mutex_init;
mutex_deinit_func gnutls_mutex_deinit = gnutls_system_mutex_deinit;
mutex_lock_func gnutls_mutex_lock = gnutls_system_mutex_lock;
mutex_unlock_func gnutls_mutex_unlock = gnutls_system_mutex_unlock;
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