qos-frame-exchange-manager.h

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/*
 * 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"
 
#include <optional>
 
namespace ns3
{
 
class QosFrameExchangeManager : public FrameExchangeManager
{
  public:
    static TypeId GetTypeId();
    QosFrameExchangeManager();
    ~QosFrameExchangeManager() override;
 
    bool StartTransmission(Ptr<Txop> edca, uint16_t allowedWidth) override;
 
    bool TryAddMpdu(Ptr<const WifiMpdu> mpdu, WifiTxParameters& txParams, Time availableTime) const;
 
    virtual bool IsWithinLimitsIfAddMpdu(Ptr<const WifiMpdu> mpdu,
                                         const WifiTxParameters& txParams,
                                         Time ppduDurationLimit) const;
 
    virtual bool IsWithinSizeAndTimeLimits(uint32_t ppduPayloadSize,
                                           Mac48Address receiver,
                                           const WifiTxParameters& txParams,
                                           Time ppduDurationLimit) const;
 
    virtual Ptr<WifiMpdu> CreateAliasIfNeeded(Ptr<WifiMpdu> mpdu) const;
 
  protected:
    void DoDispose() override;
 
    void ReceiveMpdu(Ptr<const WifiMpdu> mpdu,
                     RxSignalInfo rxSignalInfo,
                     const WifiTxVector& txVector,
                     bool inAmpdu) override;
    void PreProcessFrame(Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector) override;
    void PostProcessFrame(Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector) override;
    void NavResetTimeout() override;
    void UpdateNav(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() override;
    void TransmissionFailed() override;
    void ForwardMpduDown(Ptr<WifiMpdu> mpdu, WifiTxVector& txVector) override;
 
    virtual bool StartTransmission(Ptr<QosTxop> edca, Time txopDuration);
 
    virtual bool StartFrameExchange(Ptr<QosTxop> edca, Time availableTime, bool initialFrame);
 
    void PifsRecovery();
 
    virtual bool SendCfEndIfNeeded();
 
    virtual void SetTxopHolder(Ptr<const WifiPsdu> psdu, const WifiTxVector& txVector);
 
    virtual void ClearTxopHolderIfNeeded();
 
    Ptr<QosTxop> m_edca;                      
    std::optional<Mac48Address> m_txopHolder; 
    bool m_setQosQueueSize;                   
  private:
    void CancelPifsRecovery();
 
    bool m_initialFrame;         
    bool m_pifsRecovery;         
    EventId m_pifsRecoveryEvent; 
    Ptr<Txop> m_edcaBackingOff;  
};
 
} // namespace ns3
 
#endif /* QOS_FRAME_EXCHANGE_MANAGER_H */