/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2007-2009 Strasbourg University

 *

 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * Author: Sebastien Vincent <vincent@clarinet.u-strasbg.fr>

 */

#ifndef IPV6_END_POINT_DEMUX_H

#define IPV6_END_POINT_DEMUX_H

#include <stdint.h>

#include <list>

#include "ns3/ipv6-address.h"

#include "ipv6-interface.h"

namespace ns3

{

class Ipv6EndPoint;

/**

 * \class Ipv6EndPointDemux

 * \brief Demultiplexor for end points.

 */

class Ipv6EndPointDemux

{

public:

  typedef std::list<Ipv6EndPoint *>EndPoints;

  typedef std::list<Ipv6EndPoint *>::iterator EndPointsI;

  /**

   * \brief Constructor.

   */

  Ipv6EndPointDemux ();

  /**

   * \brief Destructor.

   */

  ~Ipv6EndPointDemux ();

  /**

   * \brief Lookup for port local.

   * \param port port to test

   * \return true if a port local is in EndPoints, false otherwise

   */

  bool LookupPortLocal (uint16_t port);

  /**

   * \brief Lookup for address and port.

   * \param addr address to test

   * \param port port to test

   * \return true if there is a match in EndPoints, false otherwise

   */

  bool LookupLocal (Ipv6Address addr, uint16_t port);

  /**

   * \brief lookup for a match with all the parameters.

   * \param dst destination address to test

   * \param dport destination port to test

   * \param src source address to test

   * \param sport source port to test

   * \param incomingInterface the incoming interface

   * \return list en IPv6EndPoints (could be 0 element)

   */

  EndPoints Lookup (Ipv6Address dst, uint16_t dport, Ipv6Address src, uint16_t sport, Ptr<Ipv6Interface> incomingInterface);

  /**

   * \brief Simple lookup for a four-tuple match.

   * \param dst destination address to test

   * \param dport destination port to test

   * \param src source address to test

   * \param sport source port to test

   * \return match or 0 if not found

   */

  Ipv6EndPoint* SimpleLookup (Ipv6Address dst, uint16_t dport, Ipv6Address src, uint16_t sport);

  /**

   * \brief Allocate a Ipv6EndPoint.

   * \return an empty Ipv6EndPoint instance

   */

  Ipv6EndPoint *Allocate (void);

  /**

   * \brief Allocate a Ipv6EndPoint.

   * \param address IPv6 address

   * \return an Ipv6EndPoint instance

   */

  Ipv6EndPoint *Allocate (Ipv6Address address);

  /**

   * \brief Allocate a Ipv6EndPoint.

   * \param port local port

   * \return an Ipv6EndPoint instance

   */

  Ipv6EndPoint *Allocate (uint16_t port);

  /**

   * \brief Allocate a Ipv6EndPoint.

   * \param address local address

   * \param port local port

   * \return an Ipv6EndPoint instance

   */

  Ipv6EndPoint *Allocate (Ipv6Address address, uint16_t port);

  /**

   * \brief Allocate a Ipv6EndPoint.

   * \param localAddress local address

   * \param localPort local port

   * \param peerAddress peer address

   * \param peerPort peer port

   * \return an Ipv6EndPoint instance

   */

  Ipv6EndPoint *Allocate (Ipv6Address localAddress, uint16_t localPort, Ipv6Address peerAddress, uint16_t peerPort);

  /**

   * \brief Remove a end point.

   * \param endPoint the end point to remove

   */

  void DeAllocate (Ipv6EndPoint *endPoint);

  /**

   * \brief Get the entire list of end points registered.

   * \return list of Ipv6EndPoint

   */

  EndPoints GetEndPoints () const;

private:

  /**

   * \brief Allocate a ephemeral port.

   * \return a port

   */

  uint16_t AllocateEphemeralPort ();

  /**

   * \brief The ephemeral port.

   */

  uint16_t m_ephemeral;

  /**

   * \brief A list of IPv6 end points.

   */

  EndPoints m_endPoints;

};

} /* namespace ns3 */

#endif /* IPV6_END_POINT_DEMUX_H */