qos-frame-exchange-manager.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2020 Universita' degli Studi di Napoli Federico II
 *
 * 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: Stefano Avallone <stavallo@unina.it>
 */

#ifndef QOS_FRAME_EXCHANGE_MANAGER_H
#define QOS_FRAME_EXCHANGE_MANAGER_H

#include "frame-exchange-manager.h"

namespace ns3 {


class QosFrameExchangeManager : public FrameExchangeManager
{
public:
  static TypeId GetTypeId (void);
  QosFrameExchangeManager ();
  virtual ~QosFrameExchangeManager ();

  bool StartTransmission (Ptr<Txop> edca) override;

  bool TryAddMpdu (Ptr<const WifiMacQueueItem> mpdu, WifiTxParameters& txParams, Time availableTime) const;

  virtual bool IsWithinLimitsIfAddMpdu (Ptr<const WifiMacQueueItem> mpdu, const WifiTxParameters& txParams,
                                        Time ppduDurationLimit) const;

  virtual bool IsWithinSizeAndTimeLimits (uint32_t ppduPayloadSize, Mac48Address receiver,
                                          const WifiTxParameters& txParams, Time ppduDurationLimit) const;

protected:
  void DoDispose () override;

  void ReceiveMpdu (Ptr<WifiMacQueueItem> mpdu, RxSignalInfo rxSignalInfo,
                    const WifiTxVector& txVector, bool inAmpdu) override;
  void PreProcessFrame (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector) override;
  Time GetFrameDurationId (const WifiMacHeader& header, uint32_t size,
                           const WifiTxParameters& txParams,
                           Ptr<Packet> fragmentedPacket) const override;
  Time GetRtsDurationId (const WifiTxVector& rtsTxVector, Time txDuration,
                         Time response) const override;
  Time GetCtsToSelfDurationId (const WifiTxVector& ctsTxVector, Time txDuration,
                               Time response) const override;
  void TransmissionSucceeded (void) override;
  void TransmissionFailed (void) override;

  virtual bool StartTransmission (Ptr<QosTxop> edca, Time txopDuration);

  virtual bool StartFrameExchange (Ptr<QosTxop> edca, Time availableTime, bool initialFrame);

  void PifsRecovery (void);

  virtual bool SendCfEndIfNeeded (void);

  virtual void SetTxopHolder (Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);

  Ptr<QosTxop> m_edca;                       
  Mac48Address m_txopHolder;                 

private:

  void CancelPifsRecovery (void);

  bool m_initialFrame;                       
  bool m_pifsRecovery;                       
  EventId m_pifsRecoveryEvent;               
  Ptr<Txop> m_edcaBackingOff;                
};

} //namespace ns3

#endif /* QOS_FRAME_EXCHANGE_MANAGER_H */