1/*
2 *  OpenVPN -- An application to securely tunnel IP networks
3 *             over a single TCP/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#ifndef PING_H
26#define PING_H
27
28#include "init.h"
29#include "forward.h"
30
31/*
32 * Initial default --ping-restart before --pull
33 */
34#define PRE_PULL_INITIAL_PING_RESTART 120  /* in seconds */
35
36extern const uint8_t ping_string[];
37
38/* PING_STRING_SIZE must be sizeof (ping_string) */
39#define PING_STRING_SIZE 16
40
41static inline bool
42is_ping_msg (const struct buffer* buf)
43{
44  return buf_string_match (buf, ping_string, PING_STRING_SIZE);
45}
46
47#endif
48