/*
  *  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) 2002-2010 OpenVPN Technologies, 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 (see the file COPYING included with this
  *  distribution); if not, write to the Free Software Foundation, Inc.,
  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include "syshead.h"
 #include "shaper.h"
 #include "memdbg.h"
 
 #ifdef HAVE_GETTIMEOFDAY
 
 /*
  * 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=%d usec=%d ret=%d",
        (int)tv->tv_sec, (int)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
 static void dummy(void) {}
 #endif /* HAVE_GETTIMEOFDAY */