trace.h

ns2 中802.11 mac层的实现代码！

/* -*-	Mode:C++; c-basic-offset:8; tab-width:8 -*- */
/*
 * Copyright (c) 1997 Regents of the University of California.
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 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 	This product includes software developed by the MASH Research
 * 	Group at the University of California Berkeley.
 * 4. Neither the name of the University nor of the Research Group may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/trace/trace.h,v 1.34 2003/08/21 18:22:02 haldar Exp $
 */

#ifndef ns_trace_h
#define ns_trace_h

#define NUMFLAGS 8

#include <math.h> // floor
#include "packet.h"
#include "basetrace.h"


/* Tracing has evolved into two types, packet tracing and event tracing.
Class Trace essentially supports packet tracing. 
However in addition to the basic tracing properties (that it derives from a BaseTrace class), pkt-tracing also requires to inherit some of the Connector class properties as well.

Hence Trace should be renamed as ConnectorTrace in the future.
And it shall have a BaseTrace * variable, where BaseTrace class supporting pure tracing functionalities and should be the parent class for all subsequent trace-related classes.
*/

class Trace : public Connector {
protected:
	nsaddr_t src_;
        nsaddr_t dst_;
        int callback_;

        virtual void format(int tt, int s, int d, Packet* p);
        void annotate(const char* s);
	int show_tcphdr_;  // bool flags; backward compat
	int show_sctphdr_; // bool flags; backward compat
	void callback();
public:
	Trace(int type);
        ~Trace();

	BaseTrace *pt_;    // support for pkt tracing

	int type_;	
        int command(int argc, const char*const* argv);
	static int get_seqno(Packet* p);
        void recv(Packet* p, Handler*);
	void recvOnly(Packet *p);

	//Default rounding is to 6 digits after decimal
	//#define PRECISION 1.0E+6
	//According to freeBSD /usr/include/float.h 15 is the number of digits 
	// in a double.  We can specify all of them, because we're rounding to
	// 6 digits after the decimal and and %g removes trailing zeros.
	//#define TIME_FORMAT "%.15g"
	// annoying way of tackling sprintf rounding platform 
	// differences :
	// use round(Scheduler::instance().clock()) instead of 
	// Scheduler::instance().clock().
	//static double round (double x, double precision=PRECISION) {
	//return (double)floor(x*precision + 0.5)/precision;
	//}

	virtual void write_nam_trace(const char *s);
	void trace(TracedVar* var);
	//void namdump();
};

class DequeTrace : public Trace {
public:
	DequeTrace(int type) : Trace(type) {}
	~DequeTrace();
	void recv(Packet* p, Handler*);

};


#endif