/* -*- 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

 *

 * Authors: 

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

 */

#include "ns3/packet.h"

#include "ns3/composite-trace-resolver.h"

#include "arp-ipv4-interface.h"

#include "node.h"

#include "net-device.h"

#include "ipv4.h"

namespace ns3 {

ArpIpv4Interface::ArpIpv4Interface (Node *node, NetDevice *device)

  : Ipv4Interface (device),

    m_node (node)

{

  m_node->Ref ();

}

ArpIpv4Interface::~ArpIpv4Interface ()

{

  m_node->Unref ();

}

TraceResolver *

ArpIpv4Interface::DoCreateTraceResolver (TraceContext const &context)

{

  CompositeTraceResolver *resolver = new CompositeTraceResolver (context);

  if (PeekDevice () != 0)

    {

      resolver->Add ("netdevice",

                     MakeCallback (&NetDevice::CreateTraceResolver, PeekDevice ()),

                     ArpIpv4Interface::NETDEVICE);

    }

  return resolver;

}

void 

ArpIpv4Interface::SendTo (Packet p, Ipv4Address dest)

{

  NS_ASSERT (PeekDevice () != 0);

  if (PeekDevice ()->NeedsArp ())

    {

      MacAddress hardwareDestination;

      bool found = arp->Lookup (p, dest, PeekDevice (), &hardwareDestination);

      if (found)

        {

          PeekDevice ()->Send (p, hardwareDestination, Ipv4::PROT_NUMBER);

        }

      arp->Unref ();

    }

  else

    {

      PeekDevice ()->Send (p, PeekDevice ()->GetBroadcast (), Ipv4::PROT_NUMBER);

    }

}

}//namespace ns3