/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- *//* * Copyright (c) 1993-1997 Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the Computer Systems *	Engineering Group at Lawrence Berkeley Laboratory. * 4. Neither the name of the University nor of the Laboratory 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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/common/agent.h,v 1.36 2003/10/05 06:20:30 xuanc Exp $ (LBL) */#ifndef ns_agent_h#define ns_agent_h#include "connector.h"#include "packet.h"#include "timer-handler.h"#include "ns-process.h"#include "app.h"//#include "basetrace.h"#define TIME_FORMAT "%.15g"// TIME_FORMAT is in basetrace.h, but including that header leads to problems#define TIMER_IDLE 0#define TIMER_PENDING 1/*  * Note that timers are now implemented using timer-handler.{cc,h} */#define TRACEVAR_MAXVALUELENGTH 128class Application;// store old value of traced vars// work only for TracedVarTclstruct OldValue {	TracedVar *var_;	char val_[TRACEVAR_MAXVALUELENGTH];	struct OldValue *next_;};class EventTrace;class Agent : public Connector { public:	Agent(packet_t pktType);	virtual ~Agent();	void recv(Packet*, Handler*);		//added for edrop tracing - ratul	void recvOnly(Packet *) {};	void send(Packet* p, Handler* h) { target_->recv(p, h); }	virtual void timeout(int tno);                // SLP	virtual int supportSLP() { return 0; }        virtual void enableSLP() {}	virtual void sendmsg(int sz, AppData*, const char* flags = 0);	virtual void send(int sz, AppData *data) { sendmsg(sz, data, 0); }	virtual void sendto(int sz, AppData*, const char* flags,			    nsaddr_t dst);	virtual void sendto(int sz, AppData*, const char* flags,			    ns_addr_t dst);	virtual void sendmsg(int nbytes, const char *flags = 0);	virtual void send(int nbytes) { sendmsg(nbytes); }	virtual void sendto(int nbytes, const char* flags, nsaddr_t dst);	virtual void sendto(int nbytes, const char* flags, ns_addr_t dst);	virtual void connect(nsaddr_t dst);	virtual void close();	virtual void listen();	virtual void attachApp(Application* app);	virtual int& size() { return size_; }	inline nsaddr_t& addr() { return here_.addr_; }	inline nsaddr_t& port() { return here_.port_; }	inline nsaddr_t& daddr() { return dst_.addr_; }	inline nsaddr_t& dport() { return dst_.port_; }	void set_pkttype(packet_t pkttype) { type_ = pkttype; }	inline packet_t get_pkttype() { return type_; } protected:	int command(int argc, const char*const* argv);	virtual void delay_bind_init_all();	virtual int delay_bind_dispatch(const char *varName, const char *localName, TclObject *tracer);	virtual void recvBytes(int bytes);	virtual void idle();	Packet* allocpkt() const;	// alloc + set up new pkt	Packet* allocpkt(int) const;	// same, but w/data buffer	void initpkt(Packet*) const;	// set up fields in a pkt	ns_addr_t here_;		// address of this agent	ns_addr_t dst_;			// destination address for pkt flow	int size_;			// fixed packet size	packet_t type_;			// type to place in packet header	int fid_;			// for IPv6 flow id field	int prio_;			// for IPv6 prio field	int flags_;			// for experiments (see ip.h)	int defttl_;			// default ttl for outgoing pkts#ifdef notdef	int seqno_;		/* current seqno */	int class_;		/* class to place in packet header */#endif	static int uidcnt_;	Tcl_Channel channel_;	char *traceName_;		// name used in agent traces	OldValue *oldValueList_; 	Application *app_;		// ptr to application for callback	virtual void trace(TracedVar *v);	void deleteAgentTrace();	void addAgentTrace(const char *name);	void monitorAgentTrace();	OldValue* lookupOldValue(TracedVar *v);	void insertOldValue(TracedVar *v, const char *value);	void dumpTracedVars();	/* support for event-tracing */        EventTrace *et_;        virtual void trace_event(char *eventtype){} private:	void flushAVar(TracedVar *v);};#endif