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/*
rateclass.h - Oscar Rate Limiting Implementation
Copyright (c) 2004 by Tom Linsky <twl6@po.cwru.edu>
Copyright (c) 2004 by Matt Rogers <mattr@k
Kopete (c) 2002-2003 by the Kopete developers <kopete-devel@kde.org>
*************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
*************************************************************************
*/
#ifndef RATECLASS_H
#define RATECLASS_H
#include "oscartypes.h"
#include <qobject.h>
#include <qvaluelist.h>
#include <qdatetime.h>
#include <qpair.h>
const int RATE_SAFETY_TIME = 50;
struct SnacPair
{
int family;
int subtype;
};
class Transfer;
class RateClass : public QObject
{
Q_OBJECT
public:
RateClass( QObject* parent = 0 );
~RateClass();
/** Accessor for classid */
Oscar::WORD id() const;
/** Sets rate information */
void setRateInfo( Oscar::RateInfo newRateInfo );
/** Add a SNAC to the rate class */
void addMember( const Oscar::SNAC& s );
/** Adds rate class members */
void addMember( Oscar::WORD family, Oscar::WORD subtype );
/** Tells whether the passed snac is a member of this rate class */
bool isMember( const Oscar::SNAC& s ) const;
/**
* Tells whether the passed family and subtype combo is a member
* of this rate class
*/
bool isMember( Oscar::WORD family, Oscar::WORD subtype ) const;
/** Add a packet to the queue */
void enqueue( Transfer* );
/** Takes a packet off the front of the queue */
void dequeue();
/** Check if the queue is empty */
bool queueIsEmpty() const;
/**
* Calulate the time until we can send again
* Uses the first packet on the queue to determine the time since that's
* the packet that will get sent.
* \return the time in milliseconds that we need to wait
*/
int timeToNextSend();
/**
* Calulate the time until we get to initial level
* \return the time in milliseconds that we need to wait
*/
int timeToInitialLevel();
/**
* Calculates a new rate level and updates the rate class' current level
* to match
*/
void updateRateInfo();
/**
* Dump the current packet queue. These packets will not be sent. Used
* on disconnection
*/
void dumpQueue();
signals:
/** Tell the rate class manager we're ready to send */
void dataReady( Transfer* );
private:
/** Calculate our new rate level */
Oscar::DWORD calcNewLevel( int timeDifference ) const;
/** sets up the timer for the transfer just added to the queue */
void setupTimer();
private slots:
/**
* Send the packet. Basically emits dataReady for the first transfer
*/
void slotSend();
private:
Oscar::RateInfo m_rateInfo;
QValueList<SnacPair> m_members;
QValueList<Transfer*> m_packetQueue;
QTime m_packetTimer;
// we are waiting for the QTimer::singleShot() to send
bool m_waitingToSend;
};
#endif
//kate: tab-width 4; indent-mode csands;
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