/*
  *  OpenVPN -- An application to securely tunnel IP networks
  *             over a single 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.

  */
 

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #elif defined(_MSC_VER)
 #include "config-msvc.h"
 #endif
 

 #include "syshead.h"
 #include "shaper.h"
 #include "memdbg.h"
 

 #ifdef ENABLE_FEATURE_SHAPER

 
 /*
  * We want to wake up in delay microseconds.  If timeval is larger
  * than delay, set timeval to delay.
  */
 bool

 shaper_soonest_event(struct timeval *tv, int delay)

 {

     bool ret = false;
     if (delay < 1000000)

     {

         if (tv->tv_sec)
         {
             tv->tv_sec = 0;
             tv->tv_usec = delay;
             ret = true;
         }
         else if (delay < tv->tv_usec)
         {
             tv->tv_usec = delay;
             ret = true;
         }

     }

     else

     {

         const int sec = delay / 1000000;
         const int usec = delay % 1000000;

         if (sec < tv->tv_sec)
         {
             tv->tv_sec = sec;
             tv->tv_usec = usec;
             ret = true;
         }
         else if (sec == tv->tv_sec)
         {
             if (usec < tv->tv_usec)
             {
                 tv->tv_usec = usec;
                 ret = true;
             }
         }

     }
 #ifdef SHAPER_DEBUG

     dmsg(D_SHAPER_DEBUG, "SHAPER shaper_soonest_event sec=%"PRIi64" usec=%ld ret=%d",
          (int64_t)tv->tv_sec, (long)tv->tv_usec, (int)ret);

 #endif

     return ret;

 }
 
 void

 shaper_reset_wakeup(struct shaper *s)

 {

     CLEAR(s->wakeup);

 }
 
 void

 shaper_msg(struct shaper *s)

 {

     msg(M_INFO, "Output Traffic Shaping initialized at %d bytes per second",
         s->bytes_per_second);

 }
 

 #else  /* ifdef ENABLE_FEATURE_SHAPER */
 static void

 dummy(void)
 {

 }

 #endif /* ENABLE_FEATURE_SHAPER */