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

/*

 * Copyright (c) 2009 IITP RAS

 *

 * 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: Kirill Andreev <andreev@iitp.ru>

 */

#include "ns3/assert.h"

#include "ns3/address-utils.h"

#include "dot11s-mac-header.h"

#include "ns3/packet.h"

namespace ns3 {

namespace dot11s {

/***********************************************************

 *  Here Mesh Mac Header functionality is defined.

 ***********************************************************/

TypeId

MeshHeader::GetTypeId ()

{

  static TypeId tid = TypeId ("ns3::Dot11sMacHeader")

    .SetParent<Header> ()

    .AddConstructor<MeshHeader> ();

  return tid;

}

MeshHeader::MeshHeader () :

  m_meshFlags (0), m_meshTtl (0), m_meshSeqno (0), m_addr4 (Mac48Address ()), m_addr5 (Mac48Address ()),

  m_addr6 (Mac48Address ())

{

}

MeshHeader::~MeshHeader ()

{

}

TypeId

MeshHeader::GetInstanceTypeId () const

{

  return GetTypeId ();

}

void

MeshHeader::SetAddr4 (Mac48Address address)

{

  m_addr4 = address;

}

void

MeshHeader::SetAddr5 (Mac48Address address)

{

  m_addr5 = address;

}

void

MeshHeader::SetAddr6 (Mac48Address address)

{

  m_addr6 = address;

}

Mac48Address

MeshHeader::GetAddr4 () const

{

  return m_addr4;

}

Mac48Address

MeshHeader::GetAddr5 () const

{

  return m_addr5;

}

Mac48Address

MeshHeader::GetAddr6 () const

{

  return m_addr6;

}

void

MeshHeader::SetMeshSeqno (uint32_t seqno)

{

  m_meshSeqno = seqno;

}

uint32_t

MeshHeader::GetMeshSeqno () const

{

  return m_meshSeqno;

}

void

MeshHeader::SetMeshTtl (uint8_t TTL)

{

  m_meshTtl = TTL;

}

uint8_t

MeshHeader::GetMeshTtl () const

{

  return m_meshTtl;

}

void

MeshHeader::SetAddressExt (uint8_t num_of_addresses)

{

  NS_ASSERT (num_of_addresses <= 3);

  m_meshFlags |= 0x03 & num_of_addresses;

}

uint8_t

MeshHeader::GetAddressExt () const

{

  return (0x03 & m_meshFlags);

}

uint32_t

MeshHeader::GetSerializedSize () const

{

  return 6 + GetAddressExt () * 6;

}

void

MeshHeader::Serialize (Buffer::Iterator start) const

{

  Buffer::Iterator i = start;

  i.WriteU8 (m_meshFlags);

  i.WriteU8 (m_meshTtl);

  i.WriteHtolsbU32 (m_meshSeqno);

  uint8_t addresses_to_add = GetAddressExt ();

  //Writing Address extensions:

  if ((addresses_to_add == 1) || (addresses_to_add == 3))

    {

      WriteTo (i, m_addr4);

    }

  if (addresses_to_add > 1)

    {

      WriteTo (i, m_addr5);

    }

  if (addresses_to_add > 1)

    {

      WriteTo (i, m_addr6);

    }

}

uint32_t

MeshHeader::Deserialize (Buffer::Iterator start)

{

  Buffer::Iterator i = start;

  uint8_t addresses_to_read = 0;

  m_meshFlags = i.ReadU8 ();

  m_meshTtl = i.ReadU8 ();

  m_meshSeqno = i.ReadLsbtohU32 ();

  addresses_to_read = m_meshFlags & 0x03;

  if ((addresses_to_read == 1) || (addresses_to_read == 3))

    {

      ReadFrom (i, m_addr4);

    }

  if (addresses_to_read > 1)

    {

      ReadFrom (i, m_addr5);

    }

  if (addresses_to_read > 1)

    {

      ReadFrom (i, m_addr6);

    }

  return i.GetDistanceFrom (start);

}

void

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

{

  os << "flags = " << (uint16_t) m_meshFlags << std::endl << "ttl = " << (uint16_t) m_meshTtl 

     << std::endl << "seqno = " << m_meshSeqno << std::endl<< "addr4 = " << m_addr4 << std::endl

     << "addr5 = " << m_addr5 << std::endl << "addr6 = " << m_addr6 << std::endl;

}

bool

operator== (const MeshHeader & a, const MeshHeader & b)

{

  return ((a.m_meshFlags == b.m_meshFlags) && (a.m_meshTtl == b.m_meshTtl)

          && (a.m_meshSeqno == b.m_meshSeqno) && (a.m_addr4 == b.m_addr4) && (a.m_addr5 == b.m_addr5)

          && (a.m_addr6 == b.m_addr6));

}

} // namespace dot11s

} // namespace ns3