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SlowStart.hpp

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 * This file is part of openWNS (open Wireless Network Simulator)
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#ifndef TCP_SLOWSTART_HPP
#define TCP_SLOWSTART_HPP


#include <WNS/pyconfig/View.hpp>
#include <WNS/logger/Logger.hpp>

#include <TCP/CongestionControlStrategy.hpp>


namespace tcp {

    class SlowStart :
        virtual public SlowStartStrategy
    {   

    public:
        explicit
        SlowStart(const wns::pyconfig::View& _pyco);

        virtual
        ~SlowStart();

        virtual void
        onSegmentLoss(segmentLoss _sl, unsigned long int _ackNR);

        virtual void
        onRTTSample();

        virtual unsigned long int
        getWindowSize();

        virtual simTimeType
        getRetransmissionTimeout();

        virtual void
        onSegmentAcknowledged();

        virtual void
        setWindowSize(unsigned long int new_cwnd);

        virtual bool
        duplicateACKThresholdReached(unsigned long int _ackNR);

        virtual void
        clearDuplicateACKCounter();

        unsigned long int
        getSlowStartThreshold();

        void
        reCalcThreshold();

    private:
        std::string
        printReason(segmentLoss reason);

        const wns::pyconfig::View pyco;

        unsigned long int cwnd;

        unsigned long int ssthresh;

        wns::logger::Logger logger;

        simTimeType timeout;

        unsigned long int
        max(unsigned long int x, unsigned long int y);
    };
} // namespace 

#endif // NOT defined TCP_SLOWSTART_HPP

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