adaptivered.hh

COPE the first practical network coding scheme which is developped on click

// -*- mode: c++; c-basic-offset: 4 -*-
#ifndef CLICK_ADAPTIVERED_HH
#define CLICK_ADAPTIVERED_HH
#include "red.hh"
#include <click/timer.hh>
CLICK_DECLS

/*
=c

AdaptiveRED(TARGET_Q, MAX_P [, I<KEYWORDS>])

=s dropping

drops packets according to Adaptive R<RED>

=d

Implements the Adaptive Random Early Detection packet dropping algorithm. This
algorithm implements Random Early Detection, as by the RED element, plus
automatic parameter setting.

The TARGET_Q argument is the target queue length. RED's MIN_THRESH parameter
is set to TARGET_Q/2, and MAX_THRESH to 3*TARGET_Q/2. The MAX_P parameter, and
QUEUES and STABILITY keywords, are as in the RED element.

=a RED */

class AdaptiveRED : public RED { public:

    AdaptiveRED();
    ~AdaptiveRED();

    const char *class_name() const		{ return "AdaptiveRED"; }
    void *cast(const char *);

    int configure(Vector<String> &, ErrorHandler *);
    int live_reconfigure(Vector<String> &, ErrorHandler *);
    int initialize(ErrorHandler *);
    void cleanup(CleanupStage);

    void run_timer();

  protected:

    Timer _timer;

    static const int ADAPTIVE_INTERVAL = 500;
    static const uint32_t ONE_HUNDREDTH = 655;
    static const uint32_t NINE_TENTHS = 58982;
    
};

CLICK_ENDDECLS
#endif