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

/*

 * Copyright (c) 2007 INRIA

 * All rights reserved.

 *

 * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#ifndef UDP_SOCKET_H

#define UDP_SOCKET_H

#include <stdint.h>

#include "ns3/callback.h"

#include "socket.h"

namespace ns3 {

class UdpEndPoint;

class Node;

class Packet;

class Udp;

class UdpSocket : public Socket

{

public:

  /**

   * Create an unbound udp socket.

   */

  UdpSocket (Node *node);

  virtual ~UdpSocket ();

  virtual enum SocketErrno GetErrno (void) const;

  virtual Node *GetNode (void) const;

  virtual int Bind (void);

  virtual int Bind (Ipv4Address address);

  virtual int Bind (uint16_t port); 

  virtual int Bind (Ipv4Address address, uint16_t port);

  virtual int ShutdownSend (void);

  virtual int ShutdownRecv (void);

private:

  virtual void DoClose(ns3::Callback<void, Socket*> closeCompleted);

  virtual void DoConnect(const Ipv4Address & address,

			 uint16_t portNumber,

			 ns3::Callback<void, Socket*> connectionSucceeded,

			 ns3::Callback<void, Socket*> connectionFailed,

			 ns3::Callback<void, Socket*> halfClose);

  virtual int DoAccept(ns3::Callback<bool, Socket*, const Ipv4Address&, uint16_t> connectionRequest,

		       ns3::Callback<void, Socket*, const Ipv4Address&, uint16_t> newConnectionCreated,

		       ns3::Callback<void, Socket*> closeRequested);

  virtual int DoSend (const uint8_t* buffer,

                    uint32_t size,

                    ns3::Callback<void, Socket*, uint32_t> dataSent);

  virtual int DoSendTo(const Ipv4Address &address,

                      uint16_t port,

                      const uint8_t *buffer,

                      uint32_t size,

                      ns3::Callback<void, Socket*, uint32_t> dataSent);

  virtual void DoRecv(ns3::Callback<void, Socket*, const uint8_t*, uint32_t,const Ipv4Address&, uint16_t>);

  virtual void DoRecvDummy(ns3::Callback<void, Socket*, uint32_t,const Ipv4Address&, uint16_t>);

private:

  friend class Udp;

  // invoked by Udp class

  void ForwardUp (Packet &p, Ipv4Address saddr, uint16_t sport);

  Udp *GetUdp (void) const;

  int DoSendPacketTo (const Packet &p, Ipv4Address daddr, uint16_t dport,

		      ns3::Callback<void, Socket*, uint32_t> dataSent);

  UdpEndPoint *m_endPoint;

  Node *m_node;

  Ipv4Address m_defaultAddress;

  uint16_t m_defaultPort;

  Callback<void,Socket*,uint32_t,const Ipv4Address &,uint16_t> m_dummyRxCallback;

  Callback<void,Socket*,uint8_t const*,uint32_t,const Ipv4Address &,uint16_t> m_rxCallback;

  enum SocketErrno m_errno;

  bool m_shutdownSend;

  bool m_shutdownRecv;

  bool m_connected;

};

}//namespace ns3

#endif /* UDP_SOCKET_H */