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

/*

 * Copyright (c) 2005 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 "adhoc-wifi-mac.h"

#include "dca-txop.h"

#include "mac-low.h"

#include "mac-rx-middle.h"

#include "wifi-phy.h"

#include "dcf-manager.h"

#include "ns3/packet.h"

#include "ns3/log.h"

NS_LOG_COMPONENT_DEFINE ("AdhocWifiMac");

namespace ns3 {

NS_OBJECT_ENSURE_REGISTERED (AdhocWifiMac);

TypeId 

AdhocWifiMac::GetTypeId (void)

{

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

    .SetParent<WifiMac> ()

    .AddConstructor<AdhocWifiMac> ()

    ;

  return tid;

}

AdhocWifiMac::AdhocWifiMac ()

{

  m_rxMiddle = new MacRxMiddle ();

  m_rxMiddle->SetForwardCallback (MakeCallback (&AdhocWifiMac::ForwardUp, this));

  m_low = CreateObject<MacLow> ();

  m_low->SetRxCallback (MakeCallback (&MacRxMiddle::Receive, m_rxMiddle));

  m_low->SetMac (this);

  m_dcfManager = new DcfManager ();

  m_dcfManager->SetupLowListener (m_low);

  m_dca = CreateObject<DcaTxop> ();

  m_dca->SetLow (m_low);

  m_dca->SetManager (m_dcfManager);

}

AdhocWifiMac::~AdhocWifiMac ()

{}

void

AdhocWifiMac::DoDispose (void)

{

  delete m_rxMiddle;

  delete m_dcfManager;

  m_rxMiddle = 0;

  m_dcfManager = 0;

  m_low = 0;

  m_phy = 0;

  m_dca = 0;

  m_stationManager = 0;

  WifiMac::DoDispose ();

}

void 

AdhocWifiMac::SetSlot (Time slotTime)

{

  m_dcfManager->SetSlot (slotTime);

  m_slot = slotTime;

}

void 

AdhocWifiMac::SetSifs (Time sifs)

{

  m_dcfManager->SetSifs (sifs);

  m_sifs = sifs;

}

void 

AdhocWifiMac::SetEifsNoDifs (Time eifsNoDifs)

{

  m_dcfManager->SetEifsNoDifs (eifsNoDifs);

  m_eifsNoDifs = eifsNoDifs;

}

Time 

AdhocWifiMac::GetSlot (void) const

{

  return m_slot;

}

Time 

AdhocWifiMac::GetSifs (void) const

{

  return m_sifs;

}

Time 

AdhocWifiMac::GetEifsNoDifs (void) const

{

  return m_eifsNoDifs;

}

void 

AdhocWifiMac::SetWifiPhy (Ptr<WifiPhy> phy)

{

  m_phy = phy;

  m_dcfManager->SetupPhyListener (phy);

  m_low->SetPhy (phy);

}

void 

AdhocWifiMac::SetWifiRemoteStationManager (Ptr<WifiRemoteStationManager> stationManager)

{

  m_stationManager = stationManager;

  m_dca->SetWifiRemoteStationManager (stationManager);

  m_low->SetWifiRemoteStationManager (stationManager);

}

void 

AdhocWifiMac::SetForwardUpCallback (Callback<void,Ptr<Packet>, const Mac48Address &> upCallback)

{

  m_upCallback = upCallback;

}

void 

AdhocWifiMac::SetLinkUpCallback (Callback<void> linkUp)

{

  // an Adhoc network is always UP.

  linkUp ();

}

void 

AdhocWifiMac::SetLinkDownCallback (Callback<void> linkDown)

{}

Mac48Address 

AdhocWifiMac::GetAddress (void) const

{

}

Ssid 

AdhocWifiMac::GetSsid (void) const

{

  return m_ssid;

}

Mac48Address 

AdhocWifiMac::GetBssid (void) const

{

  // XXX the bssid should be generated by the procedure

  // described in ieee802.11 section 11.1.3

  return Mac48Address::GetBroadcast ();

}

void 

AdhocWifiMac::SetAddress (Mac48Address address)

{

}

void 

AdhocWifiMac::SetSsid (Ssid ssid)

{

  // XXX: here, we should start a special adhoc network

  m_ssid = ssid;

}

void 

AdhocWifiMac::Enqueue (Ptr<const Packet> packet, Mac48Address to, Mac48Address from)

{

  NS_LOG_FUNCTION (packet->GetSize () << to << from);

  WifiMacHeader hdr;

  hdr.SetType (WIFI_MAC_DATA);

  hdr.SetAddr1 (to);

  hdr.SetAddr2 (from);

  hdr.SetAddr3 (GetBssid ());

  hdr.SetDsNotFrom ();

  hdr.SetDsNotTo ();

  WifiRemoteStation *destination = m_stationManager->Lookup (to);

  if (destination->IsBrandNew ())

    {

      // in adhoc mode, we assume that every destination

      // supports all the rates we support.

      for (uint32_t i = 0; i < m_phy->GetNModes (); i++)

        {

          destination->AddSupportedMode (m_phy->GetMode (i));

        }

      destination->RecordDisassociated ();

    }

  m_dca->Queue (packet, hdr);

}

void 

AdhocWifiMac::ForwardUp (Ptr<Packet> packet, WifiMacHeader const *hdr)

{

  NS_LOG_DEBUG ("received size="<<packet->GetSize ()<<", from="<<hdr->GetAddr2 ());

  if (hdr->GetAddr1 ().IsBroadcast () || hdr->GetAddr1 () == GetAddress ())

    {

      m_upCallback (packet, hdr->GetAddr2 ());

    }

}

} // namespace ns3