1/* 2 * OpenVPN -- An application to securely tunnel IP networks 3 * over a single 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#include "shaper.h" 33#include "memdbg.h" 34 35#ifdef ENABLE_FEATURE_SHAPER 36 37/* 38 * We want to wake up in delay microseconds. If timeval is larger 39 * than delay, set timeval to delay. 40 */ 41bool 42shaper_soonest_event (struct timeval *tv, int delay) 43{ 44 bool ret = false; 45 if (delay < 1000000) 46 { 47 if (tv->tv_sec) 48 { 49 tv->tv_sec = 0; 50 tv->tv_usec = delay; 51 ret = true; 52 } 53 else if (delay < tv->tv_usec) 54 { 55 tv->tv_usec = delay; 56 ret = true; 57 } 58 } 59 else 60 { 61 const int sec = delay / 1000000; 62 const int usec = delay % 1000000; 63 64 if (sec < tv->tv_sec) 65 { 66 tv->tv_sec = sec; 67 tv->tv_usec = usec; 68 ret = true; 69 } 70 else if (sec == tv->tv_sec) 71 { 72 if (usec < tv->tv_usec) 73 { 74 tv->tv_usec = usec; 75 ret = true; 76 } 77 } 78 } 79#ifdef SHAPER_DEBUG 80 dmsg (D_SHAPER_DEBUG, "SHAPER shaper_soonest_event sec=%d usec=%d ret=%d", 81 (int)tv->tv_sec, (int)tv->tv_usec, (int)ret); 82#endif 83 return ret; 84} 85 86void 87shaper_reset_wakeup (struct shaper *s) 88{ 89 CLEAR (s->wakeup); 90} 91 92void 93shaper_msg (struct shaper *s) 94{ 95 msg (M_INFO, "Output Traffic Shaping initialized at %d bytes per second", 96 s->bytes_per_second); 97} 98 99#else 100static void dummy(void) {} 101#endif /* ENABLE_FEATURE_SHAPER */ 102