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

/*

 * Copyright (c) 2005 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: Emmanuelle Laprise <emmanuelle.laprise@bluekazoo.ca>

 */

#include "ns3/assert.h"

#include "ns3/debug.h"

#include "ns3/header.h"

#include "ethernet-header.h"

#include "address-utils.h"

NS_DEBUG_COMPONENT_DEFINE ("EthernetHeader");

namespace ns3 {

bool EthernetHeader::m_enPreambleSfd = false;

EthernetHeader::EthernetHeader ()

{

  Init();

}

EthernetHeader::~EthernetHeader ()

{}

void 

EthernetHeader::Init()

{

  m_preambleSfd = 0;

  m_lengthType = 0x0;

}

void 

EthernetHeader::EnablePreambleSfd (bool enable)

{

  m_enPreambleSfd = enable;

}

void 

EthernetHeader::SetLengthType (uint16_t lengthType)

{

  m_lengthType = lengthType;

}

uint16_t 

EthernetHeader::GetLengthType (void) const

{

  return m_lengthType;

}

void 

EthernetHeader::SetPreambleSfd (uint64_t preambleSfd)

{

  m_preambleSfd = preambleSfd;

}

uint64_t 

EthernetHeader::GetPreambleSfd (void) const

{

  return m_preambleSfd;

}

void 

EthernetHeader::SetSource (MacAddress source)

{

  m_source = source;

}

MacAddress

EthernetHeader::GetSource (void) const

{

  return m_source;

}

void 

EthernetHeader::SetDestination (MacAddress dst)

{

  m_destination = dst;

}

MacAddress

EthernetHeader::GetDestination (void) const

{

  return m_destination;

}

ethernet_header_t 

EthernetHeader::GetPacketType (void) const

{

  return LENGTH;

}

uint32_t 

EthernetHeader::GetHeaderSize (void) const

{

  return GetSerializedSize();

}

std::string

EthernetHeader::DoGetName (void) const

{

  return "ETHERNET";

}

void 

EthernetHeader::PrintTo (std::ostream &os) const

{

  // ethernet, right ?

  os << "(ethernet)";

  if (m_enPreambleSfd)

    {

      os << " preamble/sfd=" << m_preambleSfd << ",";

    }

  os << " length/type=" << m_lengthType

     << ", source=" << m_source

     << ", destination=" << m_destination;

}

uint32_t 

EthernetHeader::GetSerializedSize (void) const

{

  if (m_enPreambleSfd)

    {

      return PREAMBLE_SIZE + LENGTH_SIZE + 2*MAC_ADDR_SIZE;

    } else {

      return LENGTH_SIZE + 2*MAC_ADDR_SIZE;

    }

}

void

EthernetHeader::SerializeTo (Buffer::Iterator start) const

{

  Buffer::Iterator i = start;

  if (m_enPreambleSfd)

    {

      i.WriteU64(m_preambleSfd);

    }

  NS_ASSERT (m_destination.GetLength () == MAC_ADDR_SIZE);

  NS_ASSERT (m_source.GetLength () == MAC_ADDR_SIZE);

  WriteTo (i, m_destination);

  WriteTo (i, m_source);

  i.WriteU16 (m_lengthType);

}

uint32_t

EthernetHeader::DeserializeFrom (Buffer::Iterator start)

{

  Buffer::Iterator i = start;

  if (m_enPreambleSfd)

    {

      m_enPreambleSfd = i.ReadU64 ();

    }

  ReadFrom (i, m_destination, MAC_ADDR_SIZE);

  ReadFrom (i, m_source, MAC_ADDR_SIZE);

  m_lengthType = i.ReadU16 ();

  return GetSerializedSize ();

}

}; // namespace ns3