d-tail.h

在网络仿真模拟工具下实现支持QoS的MAC层EDCF协议

#ifndef ns_d_tail_h
#define ns_d_tail_h

#include <string.h>
#include "queue.h"
#include "config.h"

/*
 * A bounded, drop-tail queue
 */
class DTail : public Queue {
  public:
	DTail() { 
		
	    q_ = new PacketQueue; 
	    pq_ = q_;
	    bind_bool("drop_front_", &drop_front_);
	    bind_bool("summarystats_", &summarystats);
	    bind_bool("queue_in_bytes_", &qib_);  // boolean: q in bytes?
	    bind("mean_pktsize_", &mean_pktsize_);
	    //		_RENAMED("drop-front_", "drop_front_");
	    //parameter for backoff instance
	    PF = 0;
	    CW_MIN = 0;
	    CW_MAX = 0;
	    AIFS = 0;
	    
	    //added by smallko
	    //bind("qweight", &qweight);
	    avgquelen=0.0;
	}
	
	
	void target_handle(NsObject* targ);
	void recv(Packet* p, Handler* h);
	~DTail() {
	    delete q_;
	}
	void   setPF(int pf);
	void   setCW_MIN(int cw_min);
	void   setCW_MAX(int cw_max);
	void   setAIFS(int aifs);
	void   setTXOPLimit(double limit);
	int    getPF();
	int    getCW_MIN();
	int    getCW_MAX();
	int    getAIFS();
	double getTXOPLimit();
        int    getLen();
	int    getByteLen();
	void   recvHighPri(Packet* p);
	PacketQueue *q_;	/* underlying FIFO queue */
	Packet* deque();	
	void enque(Packet* p);
	void setdrop(NsObject* getdrop_);
	//Connector* pricon;
	//NsObject* qdrop_;
	
	//added by smallko
	double getavgLen();
	
protected:
	void   reset();
	int    command(int argc, const char*const* argv); 
	int    drop_front_;	/* drop-from-front (rather than from tail) */
	int    summarystats;
	void   print_summarystats();
	int    qib_;       	/* bool: queue measured in bytes? */
	int    mean_pktsize_;	/* configured mean packet size in bytes */
	int    PF;
	int    CW_MIN;
	int    CW_MAX;
	int    AIFS;
	double LIMIT;
	
	//added by smallko
	//double qweight;
	double avgquelen;
};

#endif