OpenVPN
src
openvpn
fdmisc.c
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/*
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* OpenVPN -- An application to securely tunnel IP networks
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* over a single UDP port, with support for SSL/TLS-based
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* session authentication and key exchange,
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* packet encryption, packet authentication, and
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* packet compression.
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*
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* Copyright (C) 2002-2025 OpenVPN Inc <sales@openvpn.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <https://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "
syshead.h
"
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#include "
fdmisc.h
"
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#include "
error.h
"
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#include "
memdbg.h
"
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/* Set a file descriptor to non-blocking */
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bool
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set_nonblock_action
(
socket_descriptor_t
fd)
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{
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#ifdef _WIN32
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u_long arg = 1;
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if
(ioctlsocket(fd, FIONBIO, &arg))
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{
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return
false
;
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}
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#else
/* ifdef _WIN32 */
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if
(fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
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{
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return
false
;
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}
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#endif
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return
true
;
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}
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/* Set a file descriptor to not be passed across execs */
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bool
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set_cloexec_action
(
socket_descriptor_t
fd)
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{
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#ifndef _WIN32
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if
(fcntl(fd, F_SETFD, FD_CLOEXEC) < 0)
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{
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return
false
;
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}
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#endif
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return
true
;
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}
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/* Set a file descriptor to non-blocking */
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void
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set_nonblock
(
socket_descriptor_t
fd)
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{
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if
(!
set_nonblock_action
(fd))
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{
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msg
(
M_ERR
,
"Set socket to non-blocking mode failed"
);
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}
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}
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/* Set a file descriptor to not be passed across execs */
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void
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set_cloexec
(
socket_descriptor_t
fd)
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{
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if
(!
set_cloexec_action
(fd))
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{
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msg
(
M_ERR
,
"Set FD_CLOEXEC flag on file descriptor failed"
);
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}
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}
set_nonblock
void set_nonblock(socket_descriptor_t fd)
Definition
fdmisc.c:68
set_cloexec_action
bool set_cloexec_action(socket_descriptor_t fd)
Definition
fdmisc.c:55
set_cloexec
void set_cloexec(socket_descriptor_t fd)
Definition
fdmisc.c:78
set_nonblock_action
bool set_nonblock_action(socket_descriptor_t fd)
Definition
fdmisc.c:36
fdmisc.h
memdbg.h
M_ERR
#define M_ERR
Definition
error.h:104
msg
#define msg(flags,...)
Definition
error.h:150
syshead.h
socket_descriptor_t
SOCKET socket_descriptor_t
Definition
syshead.h:440
error.h
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