freenet.io.xfer

Class PacketThrottle

java.lang.Object

freenet.io.xfer.PacketThrottle

public class PacketThrottle
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static long	DEFAULT_DELAY
protected static long	MAX_DELAY
protected static long	MIN_DELAY
protected static double	PACKET_DROP_DECREASE_MULTIPLE
protected static double	PACKET_TRANSMIT_INCREMENT
protected static double	SLOW_START_DIVISOR
static java.lang.String	VERSION

Constructor Summary

Constructors

Constructor and Description
PacketThrottle(int packetSize)

Method Summary

Modifier and Type	Method and Description
double	getBandwidth() returns the number of bytes-per-second in the transmition link (?).
long	getDelay() Only used for diagnostics.
long	getRoundTripTime()
double	getWindowSize()
void	maybeDisconnected()
void	notifyOfPacketAcknowledged(double maxWindowSize) Notify the throttle that a packet was transmitted successfully.
void	notifyOfPacketsLost(int numPackets)
void	setRoundTripTime(long rtt)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

PACKET_DROP_DECREASE_MULTIPLE

protected static final double PACKET_DROP_DECREASE_MULTIPLE

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Constant Field Values

PACKET_TRANSMIT_INCREMENT

protected static final double PACKET_TRANSMIT_INCREMENT

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Constant Field Values

SLOW_START_DIVISOR

protected static final double SLOW_START_DIVISOR

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Constant Field Values

MAX_DELAY

protected static final long MAX_DELAY

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Constant Field Values

MIN_DELAY

protected static final long MIN_DELAY

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Constant Field Values

VERSION

public static final java.lang.String VERSION

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Constant Field Values

DEFAULT_DELAY

public static final long DEFAULT_DELAY

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Constant Field Values

Constructor Detail

PacketThrottle

public PacketThrottle(int packetSize)

Method Detail

setRoundTripTime

public void setRoundTripTime(long rtt)

notifyOfPacketsLost

public void notifyOfPacketsLost(int numPackets)

notifyOfPacketAcknowledged

public void notifyOfPacketAcknowledged(double maxWindowSize)

Notify the throttle that a packet was transmitted successfully. We will increase the window size.

Parameters:

maxWindowSize - The maximum window size. This should be at least twice the largest window size actually seen in flight at any time so far. We will ensure that the throttle's window size does not get bigger than this. This works even for new packet format, and solves some of the problems that RFC 2861 does.

getDelay

public long getDelay()

Only used for diagnostics. We actually maintain a real window size. So we don't need lots of sanity checking here.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getRoundTripTime

public long getRoundTripTime()

getWindowSize

public double getWindowSize()

getBandwidth

public double getBandwidth()

returns the number of bytes-per-second in the transmition link (?). FIXME: Will not return more than 1M/s due to MIN_DELAY in getDelay().

maybeDisconnected

public void maybeDisconnected()