/************************************************************************			       ---AODV-UIUC---			       This software can be used under GNU General Public License.Author: Binita Gupta <binita@uiuc.edu>	University of Illinois, Urbana-Champaign************************************************************************/#include "common.h"#include "externDec.h"RREP::RREP(RREP * rrepOb){	type = rrepOb->type;	R=0;	A=rrepOb->A;	reserved1=0;	reserved2=0;	prefix_size=rrepOb->prefix_size;	hop_cnt = rrepOb->hop_cnt;	dest_ip = rrepOb->dest_ip;	dest_seq_num = rrepOb->dest_seq_num;	src_ip = rrepOb->src_ip;	lifetime = rrepOb->lifetime;}RREP::RREP(u_int32_t dst, u_int32_t seqNum, u_int32_t srcIP, u_int8_t hopCnt, u_int32_t lTime){	type = AODV_RREP;	R = 0;	A = 0;	reserved1=0;	reserved2=0;	prefix_size=0;	hop_cnt = (hopCnt);	dest_ip = (dst);	dest_seq_num = (seqNum);	src_ip = (srcIP);	lifetime = (lTime);}int		RREP::getA(){	if( A == 1)		return 1;	else 		return 0;}void	RREP::createRREP(u_int32_t prevHop, RREQ *rreqOb){	rtable_entry	*rtEntryDst, *rtEntrySrc;	type = AODV_RREP;	R=0;	if(rrepAckFlag)		A=(1);	else		A=0;	reserved1=0;	reserved2=0;	prefix_size=0;	#ifdef DEBUG	cout << "RREP: createRREP: entered " << endl;#endif	if(rreqOb->getDestIP() == g_my_ip)	{#ifdef DEBUG		cout << "RREP: createRREP: local node case " << endl;#endif		dest_seq_num = localSeqNum; 		hop_cnt = 0;		lifetime = (MY_ROUTE_TIMEOUT);	}	else	{		/* intermediate node case */		/* also update the precursor list for both the src and destination entries */#ifdef DEBUG		cout << "RREP: createRREP: intermediate node case " << endl;#endif		rtEntryDst = rtable.findActiveRoute(rreqOb->getDestIP());		if(rtEntryDst != NULL)		{			dest_seq_num = (rtEntryDst->getDestSeqNum());			hop_cnt = (rtEntryDst->getHopCnt());#ifdef DEBUG			cout << "RREP: createRREP: hop count is " << (int)rtEntryDst->getHopCnt() << endl;			cout << "RREP: createRREP: hop count is " << (int)hop_cnt << endl;			cout << "RREP: createRREP: add prec entry " << endl;#endif			rtEntryDst->addToPrecursor(prevHop);			lifetime = (u_int32_t)(rtEntryDst->getLifeTime()-getcurrtime());			//lifetime = (u_int32_t)(15*ACTIVE_ROUTE_TIMEOUT);#ifdef DEBUG			cout << "RREP: createRREP: lifetime is " << lifetime << endl;#endif			rtEntrySrc = rtable.findActiveRoute(rreqOb->getSrcIP());			if(rtEntrySrc != NULL)			{#ifdef DEBUG				cout << "RREP: createRREP: add to src prec list " << endl;#endif				rtEntrySrc->addToPrecursor(rtEntryDst->getNextHop());			}		}	}			dest_ip = (rreqOb->getDestIP());	src_ip = (rreqOb->getSrcIP());} void	RREP::createGRREP(u_int32_t org_rreq_src, u_int32_t org_rreq_dst, u_int32_t seqNum){	rtable_entry	*rtEntry;	type = AODV_RREP;	R=0;	if(rrepAckFlag)		A=(1);	else		A=0;	reserved1=0;	reserved2=0;	prefix_size=0;#ifdef DEBUG	cout << "RREP: createGRREP: entered " << endl;#endif	rtEntry = rtable.findActiveRoute(org_rreq_src);	if(rtEntry != NULL)	{		hop_cnt = (rtEntry->getHopCnt());		lifetime = (u_int32_t)(rtEntry->getLifeTime()-getcurrtime());#ifdef DEBUG		cout << "RREP: createGRREP: hop cnt is " << (int)hop_cnt << endl;#endif	}	dest_ip = (org_rreq_src);	dest_seq_num = (seqNum);	src_ip = (org_rreq_dst);}int		RREP::recvRREP(u_int32_t prevHop){	rtable_entry	*rtEntryDst, *rtEntrySrc;	u_int64_t		currtime = getcurrtime();	u_int32_t		seqNum=0;	/* update routing entry for the prev hop node */	/* pass the source ip and seq number */	if(dest_ip == prevHop)		seqNum = dest_seq_num;	rtable.neighborUpdate(prevHop,src_ip,seqNum,(currtime+ALLOWED_HELLO_LOSS*HELLO_INTERVAL));		if(dest_ip != prevHop)		rtable.forwardRouteUpdate(prevHop, this);#ifdef DEBUG	cout << "RREP: recvRREP: dest seq num is" << dest_seq_num << endl;#endif	/* if the RREP is not for the local node and it was	 * not a hello message */	if(((src_ip) != g_my_ip) && (src_ip !=0))	{		/* need to forward the rrep */		/* update the precursor list here */		rtEntryDst = rtable.findActiveRoute((dest_ip));		rtEntrySrc = rtable.findActiveRoute((src_ip));		if(rtEntryDst != NULL)		{			if(rtEntrySrc != NULL)				rtEntryDst->addToPrecursor(rtEntrySrc->getNextHop());		}		hop_cnt = (hop_cnt+1);		/* reset the rrep ack flag at this node */		if(rrepAckFlag)			A=1;		else			A=0;		return SEND_RREP;	}	return 0;}