datagramsocket.h

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/*
    
  This file is a part of ENUt, a library containing network
  programming utilities.
  
  Copyright (C) 2006-2008  Hasselt University - Expertise Centre for
                      Digital Media (EDM) (http://www.edm.uhasselt.be)

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  
  USA

*/

#ifndef NUT_DATAGRAMSOCKET_H

#define NUT_DATAGRAMSOCKET_H

#include "nutconfig.h"
#include "nuttypes.h"
#include "socket.h"

namespace nut
{

class NetworkLayerAddress;

class ENUT_IMPORTEXPORT DatagramSocket : public Socket
{
protected:
        DatagramSocket()                                                                                { }

        DatagramSocket(const std::string &objName) : Socket(objName)                                    { }
public:
        ~DatagramSocket()                                                                               { }
        
        virtual bool joinMulticastGroup(const NetworkLayerAddress &groupAddress) = 0;

        virtual bool leaveMulticastGroup(const NetworkLayerAddress &groupAddress) = 0;
        
        virtual bool write(const void *pData, size_t &length, 
                           const NetworkLayerAddress &destinationAddress, 
                           uint16_t destinationPort) = 0;
        
        virtual bool getAvailableDataLength(size_t &length, bool &available) = 0;

        virtual bool read(void *pBuffer, size_t &bufferSize) = 0;

        virtual const NetworkLayerAddress *getLastSourceAddress() const = 0;

        virtual uint16_t getLastSourcePort() const = 0;

        virtual const NetworkLayerAddress *getLastDestinationAddress() const = 0;
};
        
} // end namespace

#endif // NUT_DATAGRAMSOCKET_H