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) 2002-2011 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/* 26 * Maintain usage stats in a memory-mapped file 27 */ 28 29#if !defined(OPENVPN_MEMSTATS_H) && defined(ENABLE_MEMSTATS) 30#define OPENVPN_MEMSTATS_H 31 32#include "basic.h" 33 34/* this struct is mapped to the file */ 35struct mmap_stats { 36 counter_type link_read_bytes; /* counter_type can be assumed to be a uint64_t */ 37 counter_type link_write_bytes; 38 int n_clients; 39 40# define MSTATS_UNDEF 0 41# define MSTATS_ACTIVE 1 42# define MSTATS_EXPIRED 2 43 int state; 44}; 45 46extern volatile struct mmap_stats *mmap_stats; /* GLOBAL */ 47 48void mstats_open(const char *fn); 49void mstats_close(void); 50 51#endif 52