/* -*-  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>

 */

#ifndef ARF_MAC_STATIONS_H

#define ARF_MAC_STATIONS_H

#include "mac-stations.h"

namespace ns3 {

class ArfMacStations : public MacStations {

public:

  ArfMacStations (WifiMode defaultTxMode, uint32_t timerThreshold, uint32_t successThreshold);

  virtual ~ArfMacStations ();

private:

  virtual class MacStation *CreateStation (void);

  uint32_t m_timerThreshold;

  uint32_t m_successThreshold;

};

class ArfMacStation : public MacStation

{

public:

  ArfMacStation (ArfMacStations *stations,

                 int minTimerTimeout,

                 int minSuccessThreshold);

  virtual ~ArfMacStation ();

  virtual void ReportRxOk (double rxSnr, WifiMode txMode);

  virtual void ReportRtsFailed (void);

  virtual void ReportDataFailed (void);

  virtual void ReportRtsOk (double ctsSnr, WifiMode ctsMode, double rtsSnr);

  virtual void ReportDataOk (double ackSnr, WifiMode ackMode, double dataSnr);

  virtual WifiMode GetDataMode (uint32_t size);

  virtual WifiMode GetRtsMode (void);

private:

  virtual ArfMacStations *GetStations (void) const;

  uint32_t m_timer;

  uint32_t m_success;

  uint32_t m_failed;

  bool m_recovery;

  uint32_t m_retry;

  uint32_t m_timerTimeout;

  uint32_t m_successThreshold;

  uint32_t m_rate;

  uint32_t m_minTimerTimeout;

  uint32_t m_minSuccessThreshold;

  ArfMacStations *m_stations;

private:

  // overriden by AarfMacStation.

  virtual void ReportRecoveryFailure (void);

  virtual void ReportFailure (void);

  uint32_t GetMaxRate (void);

  uint32_t GetMinRate (void);

  bool NeedRecoveryFallback (void);

  bool NeedNormalFallback (void);

protected:

  // called by AarfMacStation.

  uint32_t GetMinTimerTimeout (void);

  uint32_t GetMinSuccessThreshold (void);

  uint32_t GetTimerTimeout (void);

  uint32_t GetSuccessThreshold (void);

  void SetTimerTimeout (uint32_t timerTimeout);

  void SetSuccessThreshold (uint32_t successThreshold);

};

} // namespace ns3

#endif /* ARF_MAC_STATIONS_H */