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

/*

 * Copyright (c) 2005,2006 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>

 */

#include <iostream>

#include "ns3/assert.h"

#include "net-device.h"

#include "l3-demux.h"

#include "l3-protocol.h"

#include "llc-snap-header.h"

#include "node.h"

namespace ns3 {

NetDevice::NetDevice(Node *node, const MacAddress& addr) : 

  m_node (node), 

  m_name(""), 

  m_ifIndex (0), 

  m_address (addr),

  m_mtu (0xffff), 

  m_isUp (false), 

  m_isBroadcast (false), 

  m_isMulticast (false), 

  m_isPointToPoint (false)

{}

MacAddress 

NetDevice::GetAddress (void) const

{

  return m_address;

}

bool

NetDevice::SetMtu (const uint16_t mtu) 

{

  m_mtu = mtu;

  return true;

}

uint16_t 

NetDevice::GetMtu (void) const

{

  return m_mtu;

}

void

NetDevice::SetName(const std::string name) 

{ 

  m_name = name; 

}

std::string 

NetDevice::GetName(void) const 

{ 

  return m_name; 

}

bool 

NetDevice::IsLinkUp (void) const

{

  return m_isUp;

}

void 

NetDevice::SetLinkChangeCallback (Callback<void> callback)

{

  m_linkChangeCallback = callback;

}

bool

NetDevice::IsBroadcast (void) const

{

  return m_isBroadcast;

}

MacAddress const &

NetDevice::GetBroadcast (void) const

{

  NS_ASSERT (m_isBroadcast);

  return m_broadcast;

}

void

NetDevice::EnableBroadcast (MacAddress broadcast)

{

  m_isBroadcast = true;

  m_broadcast = broadcast;

}

void

NetDevice::DisableBroadcast (void)

{

  m_isBroadcast = false;

}

bool

NetDevice::IsMulticast (void) const

{

  return m_isMulticast;

}

void

NetDevice::EnableMulticast (void)

{

  m_isMulticast = true;

}

void

NetDevice::DisableMulticast (void)

{

  m_isMulticast = false;

}

bool

NetDevice::IsPointToPoint (void) const

{

  return m_isPointToPoint;

}

void

NetDevice::EnablePointToPoint (void)

{

  m_isPointToPoint = true;

}

void

NetDevice::DisablePointToPoint (void)

{

  m_isPointToPoint = false;

}

// Receive packet from above

bool 

NetDevice::Send(Packet& p, const MacAddress& dest, uint16_t protocolNumber)

{

  if (m_isUp)

    {

      LlcSnapHeader llc;

      llc.SetType (protocolNumber);

      p.Add (llc);

      return SendTo(p, dest);

    }

  else

    {

      return false;

    }

}

TraceResolver *

NetDevice::CreateTraceResolver (TraceContext const &context)

{

  return DoCreateTraceResolver (context);

}

Channel *

NetDevice::GetChannel (void) const

{

  return DoGetChannel ();

}

// Receive packet from below

bool

NetDevice::ForwardUp (Packet& packet)

{

  LlcSnapHeader llc;

  packet.Peek (llc);

  packet.Remove (llc);

  if (GetNode()->GetL3Demux() != 0)

    {

      L3Protocol *target = GetNode()->GetL3Demux()->Lookup(llc.GetType ());

      if (target != 0) 

        {

          target->Receive(packet, *this);

          return true;

        }

    }

  return false;

}

void 

NetDevice::NotifyLinkUp (void)

{

  m_isUp = true;

  if (!m_linkChangeCallback.IsNull ())

    {

      m_linkChangeCallback ();

    }

}

void 

NetDevice::NotifyLinkDown (void)

{

  m_isUp = false;

  if (!m_linkChangeCallback.IsNull ())

    {

      m_linkChangeCallback ();

    }

}

Node *

NetDevice::GetNode (void) const

{

  return m_node;

}

}; // namespace ns3