OpenVPN
basic.h
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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) 2002-2017 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 along
20  * with this program; if not, write to the Free Software Foundation, Inc.,
21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22  */
23 
24 #ifndef BASIC_H
25 #define BASIC_H
26 
27 #define BOOL_CAST(x) ((x) ? (true) : (false))
28 
29 /* size of an array */
30 #define SIZE(x) (sizeof(x)/sizeof(x[0]))
31 
32 /* clear an object (may be optimized away, use secure_memzero() to erase secrets) */
33 #define CLEAR(x) memset(&(x), 0, sizeof(x))
34 
35 #define IPV4_NETMASK_HOST 0xffffffffU
36 
37 #endif