vq.h
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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