fdmisc.h

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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) 2002-2023 OpenVPN 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; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef FD_MISC_H
#define FD_MISC_H
 
#include "basic.h"
#include "error.h"
#include "syshead.h"
 
bool set_nonblock_action(socket_descriptor_t fd);
 
bool set_cloexec_action(socket_descriptor_t fd);
 
void set_nonblock(socket_descriptor_t fd);
 
void set_cloexec(socket_descriptor_t fd);
 
static inline void
openvpn_fd_set(socket_descriptor_t fd, fd_set *setp)
{
#ifndef _WIN32 /* The Windows FD_SET() implementation does not overflow */
    ASSERT(fd >= 0 && fd < FD_SETSIZE);
#endif
    FD_SET(fd, setp);
}
#undef FD_SET /* prevent direct use of FD_SET() */
 
#endif /* FD_MISC_H */