simnet
Class DropPolicy

java.lang.Object
  simnet.DropPolicy

Direct Known Subclasses:

SimpleDropPolicy

public abstract class DropPolicy

extends java.lang.Object

An early dropper for a link's transmission queue.

Field Summary

protected int

qsize The transmission queue size on the link this drop policy is for.

Constructor Summary

DropPolicy()

Method Summary

abstract boolean	earlyDropPacket(Frame f, int remaining_bytes) Given a packet (inside a frame), and the bytes remaining in the queue, returns if the packet should be dropped.
protected void	finalize() For debugging
void	initialize(int new_qsize) Called when it first gets plugged in
void	updateSize(int new_qsize) Called when the size of the queue gets changed.

Methods inherited from class java.lang.Object

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

Field Detail

qsize

protected int qsize

The transmission queue size on the link this drop policy is for.

Constructor Detail

DropPolicy

public DropPolicy()

Method Detail

initialize

public void initialize(int new_qsize)

Called when it first gets plugged in

updateSize

public void updateSize(int new_qsize)

Called when the size of the queue gets changed. A size of -1 means infinite sized buffer.

earlyDropPacket

public abstract boolean earlyDropPacket(Frame f,
                                        int remaining_bytes)

Given a packet (inside a frame), and the bytes remaining in the queue, returns if the packet should be dropped. If remaining bytes is -1, then the queue is of unlimited size. If there is insufficient space remaining on the queue, the packet will be dropped regardless of what is returned.

finalize

protected void finalize()

For debugging