delay.h

ns2 中802.11 mac层的实现代码！

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 * 	This product includes software developed by the Network Research
 * 	Group at Lawrence Berkeley National Laboratory.
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 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/link/delay.h,v 1.16 2003/04/01 01:15:01 sfloyd Exp $ (LBL)
 */

#ifndef ns_delay_h
#define ns_delay_h

#include <assert.h>

#include "packet.h"
#include "queue.h"
#include "ip.h"
#include "connector.h"

class LinkDelay : public Connector {
 public:
	LinkDelay();
	void recv(Packet* p, Handler*);
	void send(Packet* p, Handler*);
	void handle(Event* e);
	double delay() { return delay_; }
	inline double txtime(Packet* p) {
		return (8. * hdr_cmn::access(p)->size() / bandwidth_);
	}
	double bandwidth() const { return bandwidth_; }
	void pktintran(int src, int group);
 protected:
	int command(int argc, const char*const* argv);
	void reset();
	double bandwidth_;	/* bandwidth of underlying link (bits/sec) */
	double delay_;		/* line latency */
	Event intr_;
	int dynamic_;		/* indicates whether or not link is ~ */
	double latest_time_;	/* latest scheduled packet time, for use
				 *  with avoidReordering_ */
	PacketQueue* itq_;
	int total_[4];
	int avoidReordering_;	/* indicates whether or not to avoid
				 *  reordering when link bandwidth or delay 
				 *  changes */
};

#endif