1/* 2 * OpenVPN -- An application to securely tunnel IP networks 3 * over a single UDP port, with support for SSL/TLS-based 4 * session authentication and key exchange, 5 * packet encryption, packet authentication, and 6 * packet compression. 7 * 8 * Copyright (C) 2002-2010 OpenVPN Technologies, Inc. <sales@openvpn.net> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 12 * as published by the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program (see the file COPYING included with this 21 * distribution); if not, write to the Free Software Foundation, Inc., 22 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23 */ 24 25#ifdef HAVE_CONFIG_H 26#include "config.h" 27#elif defined(_MSC_VER) 28#include "config-msvc.h" 29#endif 30 31#include "syshead.h" 32 33#include "fdmisc.h" 34#include "error.h" 35 36#include "memdbg.h" 37 38/* Set a file descriptor to non-blocking */ 39bool 40set_nonblock_action (int fd) 41{ 42#ifdef WIN32 43 u_long arg = 1; 44 if (ioctlsocket (fd, FIONBIO, &arg)) 45 return false; 46#else 47 if (fcntl (fd, F_SETFL, O_NONBLOCK) < 0) 48 return false; 49#endif 50 return true; 51} 52 53/* Set a file descriptor to not be passed across execs */ 54bool 55set_cloexec_action (int fd) 56{ 57#ifndef WIN32 58 if (fcntl (fd, F_SETFD, FD_CLOEXEC) < 0) 59 return false; 60#endif 61 return true; 62} 63 64/* Set a file descriptor to non-blocking */ 65void 66set_nonblock (int fd) 67{ 68 if (!set_nonblock_action (fd)) 69 msg (M_ERR, "Set socket to non-blocking mode failed"); 70} 71 72/* Set a file descriptor to not be passed across execs */ 73void 74set_cloexec (int fd) 75{ 76 if (!set_cloexec_action (fd)) 77 msg (M_ERR, "Set FD_CLOEXEC flag on file descriptor failed"); 78} 79