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/*
* sr_forwarder.h
* Copyright (C) 2000 by the University of Southern California
* $Id: sr_forwarder.h,v 1.2 2005/08/25 18:58:05 johnh Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module with free software programs or
* libraries that are released under the GNU LGPL and with code
* included in the standard release of ns-2 under the Apache 2.0
* license or under otherwise-compatible licenses with advertising
* requirements (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for this module and the licenses of the
* other code concerned, provided that you include the source code of
* that other code when and as the GNU GPL requires distribution of
* source code.
*
* Note that people who make modified versions of this module
* are not obligated to grant this special exception for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*
*/
// Other copyrights might apply to parts of this software and are so
// noted when applicable.
//
// Ported from CMU/Monarch's code, appropriate copyright applies.
/* -*- c++ -*-
sr_forwarder.h
source route forwarder
*/
#ifndef _sr_forwarder_
#define _sr_forwarder_
#include <object.h>
#include <trace.h>
#include "dsr_proto.h"
#include "requesttable.h"
#include "routecache.h"
/* a source route forwarding object takes packets and if it has a SR
routing header it forwards the packets into target_ according to the
header. Otherwise, it gives the packet to the noroute_ object in
hopes that it knows what to do with it. */
class SRForwarder : public NsObject {
public:
SRForwarder();
protected:
virtual int command(int argc, const char*const* argv);
virtual void recv(Packet*, Handler* callback = 0);
NsObject* target_; /* where to send forwarded pkts */
DSRProto* route_agent_; /* where to send unforwardable pkts */
RouteCache* routecache_; /* the routecache */
private:
void handlePktWithoutSR(Packet *p);
Trace *tracetarget;
int off_mac_;
int off_ll_;
int off_ip_;
int off_sr_;
};
#endif //_sr_forwarder_
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