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/* -*- Mode:C++; c-basic-offset:2; tab-width:2; indent-tabs-mode:t -*- */
/*
* Copyright (c) 1994 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 Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 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.
*
* @(#) $Header: /usr/src/mash/repository/vint/ns-2/drop-tail.h,v 1.8 1998/06/27 01
:23:45 gnguyen Exp $ (LBL)
*/
/* This version of this program contains teh token-bucket formulation.
For a non token-bucket formulation and for one that is tested, please
look at vq_plain.cc and vq_plain.h
- Srisankar
01/07/2001.
*/
#ifndef ns_vq_h
#define ns_vq_h
#include <string.h>
#include "queue.h"
#include "assert.h"
class Vq;
class LinkDelay;
class Vq : public Queue {
public:
Vq(const char *);
protected:
int command(int argc, const char*const* argv);
void enque(Packet*);
Packet* deque();
int checkPacketForECN();
void markPacketForECN(Packet* pkt);
void dropPacketForECN(Packet* pkt);
LinkDelay* link_; /* outgoing link */
PacketQueue *q_; /* underlying FIFO queue */
int drop_front_; /* drop-from-front (rather than from tail) */
double ecnlim_; /* Limit when ecn marking comes into effect*/
double buflim_;
double vq_len;
double c_;
double prev_time;
double vqprev_time;
double curr_time;
double alpha2;
double gamma_;
int qib_; /* bool: queue measured in bytes? */
double ctilde; // Virtual Capacity
int markpkts_; // Whether to mark or drop packets
int markfront_; // Mark Front?
int firstpkt;
int Pktdrp;
int pkt_cnt;
long int qlength;
int mean_pktsize_;
FILE *fp;
// added to be able to trace EDrop Objects
// the other events - forced drop, enque and deque are traced by a
// different mechanism.
NsObject * EDTrace; //early drop trace
char traceType[20]; /* the preferred type for early drop trace.
better be less than 19 chars long */
Tcl_Channel tchan_; /* place to write trace records */
TracedInt curq_; /* current qlen seen by arrivals */
void trace(TracedVar*); /* routine to write trace records */
};
#endif
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