/* -*-  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 <iomanip>

#include <iostream>

#include "ns3/assert.h"

#include "ns3/log.h"

#include "ns3/header.h"

#include "ethernet-header.h"

#include "address-utils.h"

NS_LOG_COMPONENT_DEFINE ("EthernetHeader");

namespace ns3 {

NS_HEADER_ENSURE_REGISTERED (EthernetHeader);

uint32_t

EthernetHeader::GetUid (void)

{

  static uint32_t uid = AllocateUid<EthernetHeader> ("EthernetHeader.ns3");

  return uid;

}

EthernetHeader::EthernetHeader (bool hasPreamble)

  : m_enPreambleSfd (hasPreamble),

    m_lengthType (0)

{}

EthernetHeader::EthernetHeader ()

  : m_enPreambleSfd (false),

    m_lengthType (0)

{}

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 (Mac48Address source)

{

  m_source = source;

}

Mac48Address

EthernetHeader::GetSource (void) const

{

  return m_source;

}

void 

EthernetHeader::SetDestination (Mac48Address dst)

{

  m_destination = dst;

}

Mac48Address

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::GetName (void) const

{

  return "ETHERNET";

}

void 

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

{

  // ethernet, right ?

  if (m_enPreambleSfd)

    {

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

    }

  os << " length/type=0x" << std::hex << m_lengthType << std::dec

     << ", 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::Serialize (Buffer::Iterator start) const

{

  Buffer::Iterator i = start;

  if (m_enPreambleSfd)

    {

      i.WriteU64(m_preambleSfd);

    }

  WriteTo (i, m_destination);

  WriteTo (i, m_source);

  i.WriteHtonU16 (m_lengthType);

}

uint32_t

EthernetHeader::Deserialize (Buffer::Iterator start)

{

  Buffer::Iterator i = start;

  if (m_enPreambleSfd)

    {

      m_enPreambleSfd = i.ReadU64 ();

    }

  ReadFrom (i, m_destination);

  ReadFrom (i, m_source);

  m_lengthType = i.ReadNtohU16 ();

  return GetSerializedSize ();

}

} // namespace ns3