rca-ll.cc

可以在ns-2中进行仿真的SPIN路由协议的源码

/*
 * 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
 *
 * $Id: rca-ll.cc,v 1.1.1.1 1999/06/09 14:43:19 hari Exp $
 */

#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /var/cvs/sensnet.ns-2/mit/rca/rca-ll.cc,v 1.1.1.1 1999/06/09 14:43:19 hari Exp $ (UCB)";
#endif

#include <delay.h>
// #include <object.h>
#include <packet.h>

//#include <debug.h>
#include <list.h>
#include <arp.h>
#include <topography.h>
#include <trace.h>
#include <node.h>
#include <mac.h>
#include <ll.h>
#include <mit/rca/rca-ll.h>
#include <random.h>

static class RCALinkLayerClass : public TclClass {
public:
  RCALinkLayerClass() : TclClass("RCALinkLayer") {}
  TclObject* create(int, const char*const*) {
    return (new RCALinkLayer);
  }
} class_rcalinklayer;


void RCALinkLayer::sendDown(Packet* p)
{	
	Scheduler& s = Scheduler::instance();
	hdr_rca *rcah = HDR_RCA(p);
	hdr_ll *llh = HDR_LL(p);
	char *mh = (char*)p->access(hdr_mac::offset_);

	llh->seqno() = ++seqno_;
	llh->lltype() = LL_DATA;

	mac_->hdr_src(mh, mac_->addr());
	mac_->hdr_type(mh, ETHERTYPE_IP);
	
	//Packet::PrintRcHeader(p,"Link Outgoing");
	
	mac_->hdr_dst((char*)HDR_MAC(p),rcah->rca_mac_dst());
	//s.schedule(downtarget_, p, mindelay_ / 2 + delay_ * Random::uniform());
	s.schedule(downtarget_, p, delay_);
}

void RCALinkLayer::sendUp(Packet* p)
{
  Scheduler& s = Scheduler::instance();
  //Packet::PrintRcHeader(p,"Link Incomming");
  if (hdr_cmn::access(p)->error() > 0)
    drop(p);
  else
    s.schedule(uptarget_, p, delay_);
}