marker.h

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/*
 * Copyright (c) 2000-2002, by the Rector and Board of Visitors of the 
 * University of Virginia.
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/*
 *                                                                     
 * Marker module for JoBS (and WTP).
 *                                                                     
 * Authors: Constantinos Dovrolis <dovrolis@mail.eecis.udel.edu>, 
 *          Nicolas Christin <nicolas@cs.virginia.edu>, 2000-2002       
 *                                    
 * $Id: marker.h,v 1.1 2003/02/02 22:18:22 xuanc Exp $
 */
#ifndef MARKER_H
#define MARKER_H

#define NO_CLASSES 4    // This number cannot be changed 
            // w/o modifying the code. 
            // This is, again, a prototype 
            // implementation...
#define DETERM 1    // Deterministic marker: all traffic is marked with 
            // given class (marker_class_)
#define STATIS 2    // Probabilistic marker: class-marking follow given
            // (cumulative) distribution

class Marker: public Queue {
public:
    Marker();
    virtual int command(int argc, const char*const* argv); 
    void    enque(Packet*);
    Packet* deque();
    double  marker_arrvs_[NO_CLASSES+1];    // For monitoring purposes
protected:
    int marker_type_;           // Marker type 
    double  marker_frc_[NO_CLASSES+1];  // Class-marking fractions 
                        // (STATIS)
                        // marker_frc_ represent the 
                        // *cumulative* marking distribution
    int     marker_class_;          // Fixed class marking (DETERM)
    PacketQueue *q_;            // Underlying FIFO queue 
    int rn_seed_;           // Random seed
};

#endif /* MARKER_H */

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