/* -*-	Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- *//* Modified and extended by Sandeep Kumar, Kopparapu Suman and Richa * Jain, Indian Institute of Technology, Bombay. * June, 2001*/ /* Copyright (c) 2001 Indian Insitute of Technology, Bombay.   * 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 and binary code must contain * the above copyright notice, this list of conditions and the following  * disclaimer. *  * 2. All advertising materials mentioning features or use of this software * must display the following acknowledgement:  * This product includes software developed at Indian Insitute of * Technology, Bombay.  * * 3. The name of the Institute may not be used to endorse or promote  * products derived from this software without specific prior written  * permission. * INDIAN INSTITUTE OF TECHNOLOGY, BOMBAY, MAKES NO REPRESENTATIONS  * CONCERNING EITHER THE MERCHANTABILITY OF THIS SOFTWARE OR THE  * SUITABILITY OF THIS SOFTWARE FOR ANY PARTICULAR PURPOSE.  The software  * is provided "as is" without express or implied warranty of any kind.*//* * 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 the Daedalus Research Group, http://daedalus.cs.berkeley.edu */#ifndef ns_ll_h#define ns_ll_h#include <delay.h>#include <queue.h>#include <arp.h>#include <classifier.h>#include <lanRouter.h>#include <varp.h>#include <ll-timers.h>enum LLFrameType {	LL_DATA		= 0x0001,	LL_ACK		= 0x0010};struct hdr_ll {	LLFrameType lltype_;		// link-layer frame type	int seqno_;			// sequence number	int ackno_;			// acknowledgement number	int bopno_;			// begin of packet seqno	int eopno_;			// end of packet seqno	int psize_;			// size of packet	double sendtime_;		// time the packet is sent	static int offset_;	inline int& offset() { return offset_; }	static hdr_ll* access(const Packet* p) {		return (hdr_ll*) p->access(offset_);	}	inline LLFrameType& lltype() { return lltype_; }	inline int& seqno() { return seqno_; }	inline int& ackno() { return ackno_; }	inline int& bopno() { return bopno_; }	inline int& eopno() { return eopno_; }	inline int& psize() { return psize_; }	inline double& sendtime() { return sendtime_; }};class LL : public LinkDelay {	friend class llTxTimer;		//rtx timer for datapkts	friend class llackTimer;		//rtx timer for llackspublic:	friend void ARPTable::arpinput(Packet *p, LL* ll);	friend void ARPTable::arprequest(nsaddr_t src, nsaddr_t dst, LL* ll);	LL();	virtual void recv(Packet* p, Handler* h);	void handle(Event* e) { recv((Packet*)e, 0); }	inline int initialized() {		return (mac_ && uptarget_ && downtarget_);	}// new funcs	virtual void recvACK(Packet* p);	//recv ack pkts	virtual void recvDATA(Packet* p);	//recv data pkts	virtual void sendUpDATA(Packet* p);	//reassemble and send data up	virtual void sendDown(Packet* p);		//hack for calls in snoop.cc	virtual void enqueDATA(Packet* p);		//set mac hdrs and arp 	virtual void fragDATA(Packet* p);		//fragment data 	virtual void sendDownDATA(void);		//send data down	virtual void sendACK(Packet* p);		//send ll ack//	virtual void sendUp(Packet* p);	virtual void sendHandler(void);		virtual void send_timer(void);			virtual void sendackHandler(void);	virtual void send_acktimer(void);	virtual void RetransmitDATA(void);		//rtx data on timeout	virtual void RetransmitACK(void);		//rtc ll ack on timeout		inline int seqno() { return seqno_; }	//seqno of data pkt	inline int ackno() { return ackno_; }	//ackno of ll ack pkt	inline int macDA() { return macDA_; }	        inline Queue *ifq() { return ifq_; }	//IFQ         inline NsObject* downtarget() { return downtarget_; }        inline NsObject* uptarget() { return uptarget_; } 	inline ARPTable *arp_table() { return arptable_; }	protected:	int command(int argc, const char*const* argv);	static int llverbose_; //ll layer debug output		int seqno_;			// link-layer sequence number	int ackno_;			// ACK received so far	int macDA_;			// destination MAC address	        Queue* ifq_;			// interface queue	   PacketQueue* buf_;		// queue to store frag pkts to sendDown	Mac*   mac_;		        // MAC object        LanRouter* lanrouter_;          	ARPTable*  arptable_;           // ARP table object	VARPTable* varp_;               // Virtual ARP object		NsObject* downtarget_;		// for outgoing packet 	NsObject* uptarget_;		// for incoming packet        	int acked_;			//LL layer acked?	int llfraged_;			//LL layer PDU fragmented?	int llfragsz_;			//LL layer frag size	int datacounter;		//no of rtx for data	int ackcounter;		//no of rtx for ll ack	Packet *pktTx_;		//store rtx data	Packet *pktRx_;		//store rtx ll ackprivate:	llTxTimer	lhSend_;			llackTimer acSend_;};#endif