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/*
* 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) 2002-2021 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) */
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