/*
  *  OpenVPN -- An application to securely tunnel IP networks
  *             over a single TCP/UDP port, with support for SSL/TLS-based
  *             session authentication and key exchange,
  *             packet encryption, packet authentication, and
  *             packet compression.
  *

  *  Copyright (C) 2002-2018 OpenVPN Inc <sales@openvpn.net>

  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License version 2
  *  as published by the Free Software Foundation.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *

  *  You should have received a copy of the GNU General Public License along
  *  with this program; if not, write to the Free Software Foundation, Inc.,
  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

  */
 
 /*
  * Maintain usage stats in a memory-mapped file
  */
 
 #if !defined(OPENVPN_MEMSTATS_H) && defined(ENABLE_MEMSTATS)
 #define OPENVPN_MEMSTATS_H
 
 #include "basic.h"
 
 /* this struct is mapped to the file */
 struct mmap_stats {

     counter_type link_read_bytes; /* counter_type can be assumed to be a uint64_t */
     counter_type link_write_bytes;
     int n_clients;
 
 #define MSTATS_UNDEF   0
 #define MSTATS_ACTIVE  1
 #define MSTATS_EXPIRED 2
     int state;

 };
 
 extern volatile struct mmap_stats *mmap_stats; /* GLOBAL */
 
 void mstats_open(const char *fn);

 void mstats_close(void);
 

 #endif /* if !defined(OPENVPN_MEMSTATS_H) && defined(ENABLE_MEMSTATS) */