/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- *//* * Copyright (c) 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 Daedalus Research *	Group at the University of California Berkeley. * 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. * * Contributed by Giao Nguyen, http://daedalus.cs.berkeley.edu/~gnguyen * * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/mac/mac-csma.h,v 1.16 1998/08/12 23:41:07 gnguyen Exp $ (UCB) */#ifndef ns_mac_csma_h#define ns_mac_csma_h#include "mac.h"/*// Carrier Sense Multiple Access MAC*/class MacCsma;class MacHandlerEoc : public Handler {public:	MacHandlerEoc(MacCsma* m) : mac_(m) {}	void handle(Event* e);protected:	MacCsma* mac_;};class MacCsma : public Mac {public:	MacCsma();	virtual void send(Packet* p);	virtual void resume(Packet* p = 0);	virtual void endofContention(Packet* p);protected:	virtual void backoff(Handler* h, Packet* p, double delay=0);	double txstart_;	// when the transmission starts	double ifs_;		// interframe spacing	double slotTime_;	// duration of contention slot in seconds	int cw_;		// current contention window	int cwmin_;		// minimum contention window for 1st backoff	int cwmax_;		// maximum contention window (backoff range)	int rtx_;		// number of retransmission attempt	int rtxLimit_;		// maximum number of retransmission attempt	int csense_;		// carrier sense or not	Event eEoc_;		// event at the end-of-contention	MacHandlerEoc hEoc_;	// handle end-of-contention};class MacCsmaCd : public MacCsma {public:	void endofContention(Packet*);};class MacCsmaCa : public MacCsma {public:	virtual void send(Packet*);};#endif