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

/*

 * Copyright (c) 2005,2006 INRIA

 *

 * 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 "wifi-net-device.h"

#include "wifi-mac.h"

#include "wifi-phy.h"

#include "wifi-remote-station-manager.h"

#include "wifi-channel.h"

#include "ns3/llc-snap-header.h"

#include "ns3/packet.h"

#include "ns3/uinteger.h"

#include "ns3/node.h"

#include "ns3/trace-source-accessor.h"

namespace ns3 {

TypeId 

WifiNetDevice::GetTypeId (void)

{

  static TypeId tid = TypeId ("WifiNetDevice")

    .SetParent<NetDevice> ()

    .AddAttribute ("Channel", "XXX",

                   Ptr<Channel> (0),

                   MakePtrAccessor (&WifiNetDevice::GetChannel),

                   MakePtrChecker<Channel> ())

    .AddAttribute ("Phy", "XXX",

                   Ptr<WifiPhy> (0),

                   MakePtrAccessor (&WifiNetDevice::m_phy),

                   MakePtrChecker<WifiPhy> ())

    .AddAttribute ("Mac", "XXX",

                   Ptr<WifiMac> (0),

                   MakePtrAccessor (&WifiNetDevice::m_mac),

                   MakePtrChecker<WifiMac> ())

    .AddAttribute ("RemoteStationManager", "XXX",

                   Ptr<WifiRemoteStationManager> (0),

                   MakePtrAccessor (&WifiNetDevice::m_stationManager),

                   MakePtrChecker<WifiRemoteStationManager> ())

    .AddTraceSource ("Rx", "XXX",

                     MakeTraceSourceAccessor (&WifiNetDevice::m_rxLogger))

    .AddTraceSource ("Tx", "XXX",

                     MakeTraceSourceAccessor (&WifiNetDevice::m_txLogger))

    ;

  return tid;

}

WifiNetDevice::WifiNetDevice ()

  : m_mtu (0)

{}

WifiNetDevice::~WifiNetDevice ()

{}

void

WifiNetDevice::DoDispose (void)

{

  m_node = 0;

  m_mac->Dispose ();

  m_phy->Dispose ();

  m_stationManager->Dispose ();

  m_mac = 0;

  m_phy = 0;

  m_stationManager = 0;

  // chain up.

  NetDevice::DoDispose ();

}

void 

WifiNetDevice::Setup (Ptr<Node> node, Ptr<WifiMac> mac, Ptr<WifiPhy> phy,

                      Ptr<WifiRemoteStationManager> manager,

                      Ptr<WifiChannel> channel)

{

  m_node = node;

  m_mac = mac;

  m_phy = phy;

  m_stationManager = manager;

  m_stationManager->SetupPhy (m_phy);

  m_mac->SetWifiRemoteStationManager (m_stationManager);

  m_mac->SetWifiPhy (m_phy);

  m_mac->SetForwardUpCallback (MakeCallback (&WifiNetDevice::ForwardUp, this));

  m_mac->SetLinkUpCallback (MakeCallback (&WifiNetDevice::LinkUp, this));

  m_mac->SetLinkDownCallback (MakeCallback (&WifiNetDevice::LinkDown, this));

  channel->Add (this, m_phy);

  m_phy->SetChannel (channel);

}

Ptr<WifiMac> 

WifiNetDevice::GetMac (void) const

{

  return m_mac;

}

Ptr<WifiPhy> 

WifiNetDevice::GetPhy (void) const

{

  return m_phy;

}

Ptr<WifiRemoteStationManager> 

WifiNetDevice::GetRemoteStationManager (void) const

{

  return m_stationManager;

}

void 

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

{

  m_name = name;

}

std::string 

WifiNetDevice::GetName(void) const

{

  return m_name;

}

void 

WifiNetDevice::SetIfIndex(const uint32_t index)

{

  m_ifIndex = index;

}

uint32_t 

WifiNetDevice::GetIfIndex(void) const

{

  return m_ifIndex;

}

Ptr<Channel> 

WifiNetDevice::GetChannel (void) const

{

  return m_phy->GetChannel ();

}

Address 

WifiNetDevice::GetAddress (void) const

{

  return m_mac->GetAddress ();

}

bool 

WifiNetDevice::SetMtu (const uint16_t mtu)

{

  Uinteger maxMsduSize = m_mac->GetAttribute ("MaxMsduSize");

  if (mtu > maxMsduSize && mtu > 0)

    {

      return false;

    }

  m_mtu = mtu;

  return true;

}

uint16_t 

WifiNetDevice::GetMtu (void) const

{

  if (m_mtu == 0)

    {

      Uinteger maxMsduSize = m_mac->GetAttribute ("MaxMsduSize");

      m_mtu = maxMsduSize;

    }

  return m_mtu;

}

bool 

WifiNetDevice::IsLinkUp (void) const

{

  return m_phy != 0 && m_linkUp;

}

void 

WifiNetDevice::SetLinkChangeCallback (Callback<void> callback)

{

  m_linkChange = callback;

}

bool 

WifiNetDevice::IsBroadcast (void) const

{

  return true;

}

Address 

WifiNetDevice::GetBroadcast (void) const

{

  return Mac48Address::GetBroadcast ();

}

bool 

WifiNetDevice::IsMulticast (void) const

{

  return false;

}

Address 

WifiNetDevice::GetMulticast (void) const

{

  return Mac48Address ("01:00:5e:00:00:00");

}

Address 

WifiNetDevice::MakeMulticastAddress (Ipv4Address multicastGroup) const

{

  return GetMulticast ();

}

bool 

WifiNetDevice::IsPointToPoint (void) const

{

  return false;

}

bool 

WifiNetDevice::Send(Ptr<Packet> packet, const Address& dest, uint16_t protocolNumber)

{

  NS_ASSERT (Mac48Address::IsMatchingType (dest));

  Mac48Address realTo = Mac48Address::ConvertFrom (dest);

  LlcSnapHeader llc;

  llc.SetType (protocolNumber);

  packet->AddHeader (llc);

  m_txLogger (packet, realTo);

  m_mac->Enqueue (packet, realTo);

  return true;

}

Ptr<Node> 

WifiNetDevice::GetNode (void) const

{

  return m_node;

}

bool 

WifiNetDevice::NeedsArp (void) const

{

  return true;

}

void 

WifiNetDevice::SetReceiveCallback (NetDevice::ReceiveCallback cb)

{

  m_forwardUp = cb;

}

void

WifiNetDevice::ForwardUp (Ptr<Packet> packet, const Mac48Address &from)

{

  LlcSnapHeader llc;

  packet->RemoveHeader (llc);

  m_forwardUp (this, packet, llc.GetType (), from);

  m_rxLogger (packet, from);

}

void

WifiNetDevice::LinkUp (void)

{

  m_linkUp = true;

  if (!m_linkChange.IsNull ())

    {

      m_linkChange ();

    }

}

void

WifiNetDevice::LinkDown (void)

{

  m_linkUp = false;

  if (!m_linkChange.IsNull ())

    {

      m_linkChange ();

    }

}

} // namespace ns3