release/src/router/openvpn/ping.h

   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) 2002-2009 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
  36 extern const uint8_t ping_string[];
  37
  38 /* PING_STRING_SIZE must be sizeof (ping_string) */
  39 #define PING_STRING_SIZE 16
  40
  41 static inline bool
  42 is_ping_msg (const struct buffer* buf)
  43 {
  44   return buf_string_match (buf, ping_string, PING_STRING_SIZE);
  45 }
  46
  47 #endif