/* -*-  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 "ns3/mesh-wifi-mac-header.h"

namespace ns3 {

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

 *  Here Mesh Mac Header functionality is defined.

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

TypeId

WifiMeshHeader::GetTypeId ()

{

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

  return tid;

}

WifiMeshHeader::WifiMeshHeader ():

  m_meshFlags (0),

  m_meshTtl (0),

  m_meshSeqno (0),

  m_addr4 (Mac48Address ()),

  m_addr5 (Mac48Address ()),

  m_addr6 (Mac48Address ())

{

}

WifiMeshHeader::~WifiMeshHeader ()

{

}

TypeId

WifiMeshHeader::GetInstanceTypeId () const

{

  return GetTypeId ();

}

void

WifiMeshHeader::SetAddr4 (Mac48Address address)

{

  m_addr4 = address;

}

void

WifiMeshHeader::SetAddr5 (Mac48Address address)

{

  m_addr5 = address;

}

void

WifiMeshHeader::SetAddr6 (Mac48Address address)

{

  m_addr6 = address;

}

Mac48Address

WifiMeshHeader::GetAddr4 () const

{

  return m_addr4;

}

Mac48Address

WifiMeshHeader::GetAddr5 () const

{

  return m_addr5;

}

Mac48Address

WifiMeshHeader::GetAddr6 () const

{

  return m_addr6;

}

void

WifiMeshHeader::SetMeshSeqno (uint32_t seqno)

{

  m_meshSeqno = seqno;

}

uint32_t

WifiMeshHeader::GetMeshSeqno () const

{

  return m_meshSeqno;

}

void

WifiMeshHeader::SetMeshTtl (uint8_t TTL)

{

  m_meshTtl = TTL;

}

uint8_t

WifiMeshHeader::GetMeshTtl () const

{

  return m_meshTtl;

}

void

WifiMeshHeader::SetAddressExt (uint8_t num_of_addresses)

{

  if (num_of_addresses > 3)

    return;

  m_meshFlags |= 0xc0 & (num_of_addresses << 6);

}

uint8_t

WifiMeshHeader::GetAddressExt () const

{

  return ((0xc0 & m_meshFlags) >> 6);

}

uint32_t

WifiMeshHeader::GetSerializedSize () const

{

  return 6 + GetAddressExt () * 6;

}

void

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

{

  Buffer::Iterator i = start;

  i.WriteU8 (m_meshFlags);

  i.WriteU8 (m_meshTtl);

  i.WriteU32 (m_meshSeqno);

  uint8_t addresses_to_add = GetAddressExt ();

  //Writing Address extensions:

  if (addresses_to_add > 0)

    WriteTo (i, m_addr4);

  if (addresses_to_add > 1)

    WriteTo (i, m_addr5);

  if (addresses_to_add > 2)

    WriteTo (i, m_addr6);

}

uint32_t

WifiMeshHeader::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.ReadU32 ();

  addresses_to_read = (m_meshFlags & 0xc0) >> 6;

  if (addresses_to_read > 0)

    ReadFrom (i, m_addr4);

  if (addresses_to_read > 1)

    ReadFrom (i, m_addr5);

  if (addresses_to_read > 2)

    ReadFrom (i, m_addr6);

  return i.GetDistanceFrom (start);

}

void

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

{

  os << "flags" << m_meshFlags

  << "ttl" << m_meshTtl

  << "seqno" << m_meshSeqno;

}

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

 *   MultihopActionFrame

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

WifiMeshMultihopActionHeader::WifiMeshMultihopActionHeader ()

{

}

WifiMeshMultihopActionHeader::~WifiMeshMultihopActionHeader ()

{

}

void

WifiMeshMultihopActionHeader::SetAction (

  enum WifiMeshMultihopActionHeader::CategoryValue type,

  WifiMeshMultihopActionHeader::ACTION_VALUE action)

{

  switch (type)

    {

    case MESH_PEER_LINK_MGT:

      m_category = 4;

      switch (action.peerLink)

        {

        case PEER_LINK_OPEN:

          m_actionValue = 0;

          break;

        case PEER_LINK_CONFIRM:

          m_actionValue = 1;

          break;

        case PEER_LINK_CLOSE:

          m_actionValue = 2;

          break;

        };

      break;

    case MESH_LINK_METRIC:

      m_category = 5;

      break;

    case MESH_PATH_SELECTION:

      m_category = 6;

      switch (action.pathSelection)

        {

        case PATH_REQUEST:

          m_actionValue = 0;

          break;

        case PATH_REPLY:

          m_actionValue = 1;

          break;

        case PATH_ERROR:

          m_actionValue = 2;

          break;

        case ROOT_ANNOUNCEMENT:

          m_actionValue = 3;

          break;

        };

      break;

    case MESH_INTERWORK_ACTION:

      m_category = 7;

      break;

    case MESH_RESOURCE_COORDINATION:

      m_category = 8;

      break;

    };

}

enum WifiMeshMultihopActionHeader::CategoryValue

WifiMeshMultihopActionHeader::GetCategory ()

{

  switch (m_category)

    {

    case 4:

      return MESH_PEER_LINK_MGT;

    case 5:

      return MESH_LINK_METRIC;

    case 6:

      return MESH_PATH_SELECTION;

    case 7:

      return MESH_INTERWORK_ACTION;

    case 8:

      return MESH_RESOURCE_COORDINATION;

    default:

      NS_ASSERT (false);

      return MESH_PEER_LINK_MGT;

    }

}

WifiMeshMultihopActionHeader::ACTION_VALUE

WifiMeshMultihopActionHeader::GetAction ()

{

  ACTION_VALUE retval;

  switch (m_category)

    {

    case 4:

      //MESH_PEER_LINK_MGT;

      switch (m_actionValue)

        {

        case 0:

          retval.peerLink = PEER_LINK_OPEN;

          return retval;

        case 1:

          retval.peerLink = PEER_LINK_CONFIRM;

          return retval;

        case 2:

          retval.peerLink = PEER_LINK_CLOSE;

          return retval;

        default:

          NS_ASSERT (false);

          return retval;

        }

    case 5:

      //MESH_LINK_METRIC;

    case 6:

      //MESH_PATH_SELECTION;

      switch (m_actionValue)

        {

        case 0:

          retval.pathSelection = PATH_REQUEST;

          return retval;

        case 1:

          retval.pathSelection = PATH_REPLY;

          return retval;

        case 2:

          retval.pathSelection = PATH_ERROR;

          return retval;

        case 3:

          retval.pathSelection = ROOT_ANNOUNCEMENT;

          return retval;

        default:

          NS_ASSERT (false);

          return retval;

        }

    case 7:

      //MESH_INTERWORK_ACTION;

    case 8:

      //MESH_RESOURCE_COORDINATION;

    default:

      NS_ASSERT (false);

      return retval;

    }

}

TypeId

WifiMeshMultihopActionHeader::GetTypeId ()

{

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

                      .SetParent<Header> ()

                      .AddConstructor<WifiMeshMultihopActionHeader> ()

                      ;

  return tid;

}

TypeId

WifiMeshMultihopActionHeader::GetInstanceTypeId () const

{

  return GetTypeId ();

}

void

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

{

}

uint32_t

WifiMeshMultihopActionHeader::GetSerializedSize () const

{

  return 2;

}

void

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

{

  start.WriteU8 (m_category);

  start.WriteU8 (m_actionValue);

}

uint32_t

WifiMeshMultihopActionHeader::Deserialize (Buffer::Iterator start)

{

  Buffer::Iterator i = start;

  m_category = i.ReadU8 ();

  m_actionValue = i.ReadU8 ();

  return i.GetDistanceFrom (start);

}

} // namespace ns3