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/* -*- 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 the Daedalus Research Group, UC Berkeley
* (http://daedalus.cs.berkeley.edu)
*
* @(#) $Header: /cvsroot/nsnam/ns-2/queue/fec.h,v 1.1 2001/03/07 18:30:02 jahn Exp $ (UCB)
*/
#ifndef ns_fecmodel_h
#define ns_fecmodel_h
#include "bi-connector.h"
#include "ranvar.h"
#include "packet.h"
/*
* Basic object for error models. This can be used unchanged by error
* models that are characterized by a single parameter, the rate of errors
* (or equivalently, the mean duration/spacing between errors). Currently,
* this includes the uniform and exponentially-distributed models.
*/
class FECModel : public BiConnector {
public:
FECModel();
virtual void recv(Packet*, Handler*);
protected:
virtual int command(int argc, const char*const* argv);
void addfec(Packet *p);
void subfec(Packet *p);
int firstTime_; // to not corrupt first packet in byte model
int FECstrength_; // indicate how many corrupted bits are corrected
int FECbyte_;
int debug_;
};
#endif
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