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/*
 *  anytun
 *
 *  The secure anycast tunneling protocol (satp) defines a protocol used
 *  for communication between any combination of unicast and anycast
 *  tunnel endpoints.  It has less protocol overhead than IPSec in Tunnel
 *  mode and allows tunneling of every ETHER TYPE protocol (e.g.
 *  ethernet, ip, arp ...). satp directly includes cryptography and
 *  message authentication based on the methodes used by SRTP.  It is
 *  intended to deliver a generic, scaleable and secure solution for
 *  tunneling and relaying of packets of any protocol.
 *
 *
 *  Copyright (C) 2007 anytun.org <satp@wirdorange.org>
 *
 *  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 "portWindow.h"

PortWindow::PortWindow(u_int16_t start, u_int16_t end) : start_port_(start), end_port_(end)
{
}

PortWindow::~PortWindow()
{
}

PortWindow::PortSet::size_type PortWindow::getLength()
{
  Lock lock(mutex_);
  return ports_.size();
}

bool PortWindow::hasPort(u_int16_t port)
{
  Lock lock(mutex_);

  PortSet::const_iterator it=ports_.find(port);
  if(it == ports_.end())
    return false;
  return true;
}

bool PortWindow::freePort(u_int16_t port)
{
  Lock lock(mutex_);

  PortSet::iterator it=ports_.find(port);
  if(it == ports_.end())
    return false;
	ports_.erase(it);
  return true;
}

u_int16_t PortWindow::newPort()
{
  Lock lock(mutex_);
	u_int16_t port= start_port_;
	while (port<end_port_ && ports_.find(port) !=ports_.end())
	  port++;
  if (port>=end_port_)
		return 0;
	ports_.insert(port);
	return port;
}

void PortWindow::clear()
{
  Lock lock(mutex_);
  ports_.clear();
}