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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (c) 2000 International Computer Science Institute
* 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 ACIRI, the AT&T
* Center for Internet Research at ICSI (the International Computer
* Science Institute).
* 4. Neither the name of ACIRI nor of ICSI may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ICSI 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 ICSI 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.
*
*/
#ifndef ns_rate_limit_strategy_h
#define ns_rate_limit_strategy_h
#include "pushback-constants.h"
#include "packet.h"
#include "rate-estimator.h"
#include "timer-handler.h"
//container class for rate limiter
class RateLimiter {
public:
virtual ~RateLimiter () {}
virtual int rateLimit(Packet * p, double estRate, double targetRate,
int mine, int lowDemand)=0;
virtual void reset()=0;
};
class PacketTypeLog;
class RateLimitStrategy {
public:
double target_rate_; //predefined flow rate in bps
double reset_time_; //time since the aggregate stats are being collected
RateEstimator * rateEstimator_;
RateLimiter * rateLimiter_;
int ptype_;
double ptype_share_;
RateEstimator * ptypeRateEstimator_;
RateLimiter * ptypeRateLimiter_;
PacketTypeLog * ptypeLog_;
RateLimitStrategy(double rate, int ptype, double share, double estimate);
~RateLimitStrategy();
double process(Packet * p, int mine, int lowDemand);
void restrictPacketType(int type, double share, double actual);
double getDropRate();
double getArrivalRate();
void reset();
};
class PacketTypeLog : public TimerHandler {
public:
int count_;
int typeCount_[MAX_PACKET_TYPES];
RateLimitStrategy * rlStrategy_;
PacketTypeLog(RateLimitStrategy *);
virtual ~PacketTypeLog();
void log(Packet *);
static int mapTypeToIndex(int type);
static int mapIndexToType(int index);
static double mapTypeToShare(int type);
protected:
void expire(Event *e);
};
class TokenBucketRateLimiter: public RateLimiter {
public:
//the static parameters
double bucket_depth_; //depth of the token bucket in bytes
//the dynamic state
double tbucket_; //number of tokens in the bucket; in bytes
double time_last_token_;
double total_passed_;
double total_dropped_;
TokenBucketRateLimiter();
virtual ~TokenBucketRateLimiter () {}
int rateLimit(Packet * p, double estRate, double targetRate, int mine, int lowDemand);
void reset();
};
class PrefDropRateLimiter : public RateLimiter {
public:
//state for Pref Drop Implementation Goes Here
/* virtual double process(Packet *p) { */
/* //todo" stuff here */
/* return 0; */
/* } */
};
#endif
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