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#ifdef HAVE_CONFIG_H 26#include "config.h" 27#elif defined(_MSC_VER) 28#include "config-msvc.h" 29#endif 30 31#include "syshead.h" 32 33#include "interval.h" 34 35#include "memdbg.h" 36 37void 38interval_init (struct interval *top, int horizon, int refresh) 39{ 40 CLEAR (*top); 41 top->refresh = refresh; 42 top->horizon = horizon; 43} 44 45bool 46event_timeout_trigger (struct event_timeout *et, 47 struct timeval *tv, 48 const int et_const_retry) 49{ 50 bool ret = false; 51 const time_t local_now = now; 52 53 if (et->defined) 54 { 55 int wakeup = (int) et->last + et->n - local_now; 56 if (wakeup <= 0) 57 { 58#if INTERVAL_DEBUG 59 dmsg (D_INTERVAL, "EVENT event_timeout_trigger (%d) etcr=%d", et->n, et_const_retry); 60#endif 61 if (et_const_retry < 0) 62 { 63 et->last = local_now; 64 wakeup = et->n; 65 ret = true; 66 } 67 else 68 { 69 wakeup = et_const_retry; 70 } 71 } 72 73 if (tv && wakeup < tv->tv_sec) 74 { 75#if INTERVAL_DEBUG 76 dmsg (D_INTERVAL, "EVENT event_timeout_wakeup (%d/%d) etcr=%d", wakeup, et->n, et_const_retry); 77#endif 78 tv->tv_sec = wakeup; 79 tv->tv_usec = 0; 80 } 81 } 82 return ret; 83} 84