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

//

// Copyright (c) 2006 Georgia Tech Research Corporation

// 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: George F. Riley<riley@ece.gatech.edu>

//

// Implementation of the InternetNode class for ns3.

// George F. Riley, Georgia Tech, Fall 2006

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

#include "application-list.h"

#include "l3-demux.h"

#include "ipv4-l4-demux.h"

#include "internet-node.h"

#include "udp.h"

#include "ipv4.h"

#include "arp.h"

#include "net-device.h"

namespace ns3 {

InternetNode::InternetNode()

{

  // Instantiate the capabilities

  m_applicationList = new ApplicationList(this);

  L3Demux *l3Demux = new L3Demux(this);

  NsUnknown::AddInterface (l3Demux);

  Ipv4 *ipv4 = new Ipv4 (this);

  Arp *arp = new Arp (this);

  Udp *udp = new Udp (this);

  l3Demux->Insert (ipv4);

  l3Demux->Insert (arp);

  l3Demux->Unref ();

  ipv4->Unref ();

  arp->Unref ();

  udp->Unref ();

}

InternetNode::~InternetNode ()

{}

void

InternetNode::SetName (std::string name)

{

  m_name = name;

}

TraceResolver *

InternetNode::CreateTraceResolver (TraceContext const &context)

{

  CompositeTraceResolver *resolver = new CompositeTraceResolver (context);

  Ipv4 *ipv4 = GetIpv4 ();

  resolver->Add ("ipv4",

                 MakeCallback (&Ipv4::CreateTraceResolver, ipv4),

                 InternetNode::IPV4);

  ipv4->Unref ();

  Arp *arp = GetArp ();

  resolver->Add ("arp",

                 MakeCallback (&Arp::CreateTraceResolver, arp),

                 InternetNode::ARP);

  arp->Unref ();

  Udp *udp = GetUdp ();

  resolver->Add ("udp",

                 MakeCallback (&Udp::CreateTraceResolver, udp),

                 InternetNode::UDP);

  udp->Unref ();

  return resolver;

}

void 

InternetNode::DoDispose()

{

  if (m_applicationList != 0)

    {

      m_applicationList->Dispose ();

      m_applicationList->Unref ();

      m_applicationList = 0;

    }

  Node::DoDispose ();

}

ApplicationList* 

InternetNode::GetApplicationList() const

{ 

  m_applicationList->Ref ();

  return m_applicationList;

} 

Ipv4 *

InternetNode::GetIpv4 (void) const

{

  L3Demux *l3Demux = QueryInterface<L3Demux> (L3Demux::iid);

  Ipv4 *ipv4 = static_cast<Ipv4*> (l3Demux->PeekProtocol (Ipv4::PROT_NUMBER));

  l3Demux->Unref ();

  ipv4->Ref ();

  return ipv4;

}

Udp *

InternetNode::GetUdp (void) const

{

  udp->Ref ();

  return udp;

}

Arp *

InternetNode::GetArp (void) const

{

  L3Demux *l3Demux = QueryInterface<L3Demux> (L3Demux::iid);

  Arp *arp = static_cast<Arp*> (l3Demux->PeekProtocol (Arp::PROT_NUMBER));

  l3Demux->Unref ();

  arp->Ref ();

  return arp;

}

void 

InternetNode::DoAddDevice (NetDevice *device) const

{

  device->SetReceiveCallback (MakeCallback (&InternetNode::ReceiveFromDevice, this));

}

bool

InternetNode::ReceiveFromDevice (NetDevice *device, const Packet &p, uint16_t protocolNumber) const

{

  L3Demux *demux = QueryInterface<L3Demux> (L3Demux::iid);

  L3Protocol *target = demux->PeekProtocol (protocolNumber);

  demux->Unref ();

  if (target != 0) 

    {

      Packet packet = p;

      target->Receive(packet, device);

      return true;

    }

  return false;

}

}//namespace ns3