/* -*-  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/pointer.h"

#include "ns3/node.h"

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

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED (WifiNetDevice);

TypeId 

WifiNetDevice::GetTypeId (void)

{

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

    .SetParent<NetDevice> ()

    .AddAttribute ("Channel", "The channel attached to this device",

                   PointerValue (),

                   MakePointerAccessor (&WifiNetDevice::DoGetChannel),

                   MakePointerChecker<WifiChannel> ())

    .AddAttribute ("Phy", "The PHY layer attached to this device.",

                   PointerValue (),

                   MakePointerAccessor (&WifiNetDevice::GetPhy,

                                        &WifiNetDevice::SetPhy),

                   MakePointerChecker<WifiPhy> ())

    .AddAttribute ("Mac", "The MAC layer attached to this device.",

                   PointerValue (),

                   MakePointerAccessor (&WifiNetDevice::GetMac,

                                        &WifiNetDevice::SetMac),

                   MakePointerChecker<WifiMac> ())

    .AddAttribute ("RemoteStationManager", "The station manager attached to this device.",

                   PointerValue (),

                   MakePointerAccessor (&WifiNetDevice::SetRemoteStationManager,

                                        &WifiNetDevice::GetRemoteStationManager),

                   MakePointerChecker<WifiRemoteStationManager> ())

    ;

  return tid;

}

WifiNetDevice::WifiNetDevice ()

  : m_mtu (0),

    m_configComplete (false)

{}

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::CompleteConfig (void)

{

  if (m_mac == 0 || 

      m_phy == 0 || 

      m_stationManager == 0 ||

      m_node == 0 ||

      m_configComplete)

    {

      return;

    }

  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));

  m_stationManager->SetupPhy (m_phy);

  m_configComplete = true;

}

void 

WifiNetDevice::SetMac (Ptr<WifiMac> mac)

{

  m_mac = mac;

  CompleteConfig ();

}

void 

WifiNetDevice::SetPhy (Ptr<WifiPhy> phy)

{

  m_phy = phy;

  CompleteConfig ();

}

void 

WifiNetDevice::SetRemoteStationManager (Ptr<WifiRemoteStationManager> manager)

{

  m_stationManager = manager;

  CompleteConfig ();

}

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::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 ();

}

Ptr<WifiChannel> 

WifiNetDevice::DoGetChannel (void) const

{

  return m_phy->GetChannel ();

}

Address 

WifiNetDevice::GetAddress (void) const

{

  return m_mac->GetAddress ();

}

bool 

WifiNetDevice::SetMtu (const uint16_t mtu)

{

  UintegerValue maxMsduSize;

  m_mac->GetAttribute ("MaxMsduSize", maxMsduSize);

  if (mtu > maxMsduSize.Get () || mtu == 0)

    {

      return false;

    }

  m_mtu = mtu;

  return true;

}

uint16_t 

WifiNetDevice::GetMtu (void) const

{

  if (m_mtu == 0)

    {

      UintegerValue maxMsduSize;

      m_mac->GetAttribute ("MaxMsduSize", maxMsduSize);

      m_mtu = maxMsduSize.Get ();

    }

  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 true;

}

Address 

WifiNetDevice::GetMulticast (Ipv4Address multicastGroup) const

{

  return Mac48Address::GetMulticast (multicastGroup);

}

Address WifiNetDevice::GetMulticast (Ipv6Address addr) const

{

  return Mac48Address::GetMulticast (addr);

}

bool 

WifiNetDevice::IsPointToPoint (void) const

{

  return false;

}

bool 

WifiNetDevice::IsBridge (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);

  Mac48Address realFrom = Mac48Address::ConvertFrom (GetAddress ());

  LlcSnapHeader llc;

  llc.SetType (protocolNumber);

  packet->AddHeader (llc);

  m_mac->NotifyTx (packet);

  m_mac->Enqueue (packet, realTo);

  return true;

}

Ptr<Node> 

WifiNetDevice::GetNode (void) const

{

  return m_node;

}

void 

WifiNetDevice::SetNode (Ptr<Node> node)

{

  m_node = node;

  CompleteConfig ();

}

bool 

WifiNetDevice::NeedsArp (void) const

{

  return true;

}

void 

WifiNetDevice::SetReceiveCallback (NetDevice::ReceiveCallback cb)

{

  m_forwardUp = cb;

}

void

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

{

  LlcSnapHeader llc;

  packet->RemoveHeader (llc);

  enum NetDevice::PacketType type;

  if (to.IsBroadcast ())

    {

      type = NetDevice::PACKET_BROADCAST;

    }

  else if (to.IsGroup ())

    {

      type = NetDevice::PACKET_MULTICAST;

    }

  else if (to == m_mac->GetAddress ())

    {

      type = NetDevice::PACKET_HOST;

    }

  else

    {

      type = NetDevice::PACKET_OTHERHOST;

    }

  if (type != NetDevice::PACKET_OTHERHOST)

    {

      m_mac->NotifyRx (packet);

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

    }

  if (!m_promiscRx.IsNull ())

    {

      m_mac->NotifyPromiscRx (packet);

      m_promiscRx (this, packet, llc.GetType (), from, to, type);

    }

}

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 ();

    }

}

bool

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

{

  NS_ASSERT (Mac48Address::IsMatchingType (dest));

  NS_ASSERT (Mac48Address::IsMatchingType (source));

  Mac48Address realTo = Mac48Address::ConvertFrom (dest);

  Mac48Address realFrom = Mac48Address::ConvertFrom (source);

  LlcSnapHeader llc;

  llc.SetType (protocolNumber);

  packet->AddHeader (llc);

  m_mac->NotifyTx (packet);

  m_mac->Enqueue (packet, realTo, realFrom);

  return true;

}

void

WifiNetDevice::SetPromiscReceiveCallback (PromiscReceiveCallback cb)

{

  m_promiscRx = cb;

}

bool

WifiNetDevice::SupportsSendFrom (void) const

{

  return m_mac->SupportsSendFrom ();

}

} // namespace ns3