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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * 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: George Riley <riley@ece.gatech.edu>
 */

// Provides an interface to aggregate to MPI-compatible NetDevices 

#ifndef NS3_MPI_RECEIVER_H
#define NS3_MPI_RECEIVER_H

#include "ns3/object.h"
#include "ns3/packet.h"

namespace ns3 {

/**
 * \ingroup mpi
 *
 * Class to aggregate to a NetDevice if it supports MPI capability
 * 
 * MpiInterface::ReceiveMessages () needs to send packets to a NetDevice
 * Receive() method.  Since each NetDevice's Receive() method is specific
 * to the derived class, and since we do not know whether such a NetDevice
 * is MPI-capable, we aggregate one of these objects to each MPI-capable
 * device.  In addition, we must hook up a NetDevice::Receive() method
 * to the callback.  So the two steps to enable MPI capability are to
 * aggregate this object to a NetDevice, and to set the callback.
 */
class MpiReceiver : public Object
{
public:
  static TypeId GetTypeId (void);
  virtual ~MpiReceiver ();

  /**
   * \brief Direct an incoming packet to the device Receive() method
   * \param p Packet to receive
   */
  void Receive (Ptr<Packet> p);
  /**
   * \brief Set the receive callback to get packets to net devices
   * \param callback the callback itself
   */
  void SetReceiveCallback (Callback<void, Ptr<Packet> > callback);
private:
  Callback<void, Ptr<Packet> > m_rxCallback;
};

} // namespace ns3

#endif /* NS3_MPI_RECEIVER_H */