drcl.inet.core.queue
Class FRED

java.lang.Object
  drcl.DrclObj
      drcl.comp.queue.QLogic
          drcl.inet.core.queue.RED
              drcl.inet.core.queue.FRED

All Implemented Interfaces:

java.lang.Cloneable, ObjectCloneable, ObjectDuplicable, PktClassifier, java.io.Serializable

public class FRED

extends RED

implements PktClassifier

The Fair Random Early Detection queue logic.

See Also:

Serialized Form

Field Summary

static boolean

SANITY_CHECK

Fields inherited from class drcl.inet.core.queue.RED

EVENT_AVG_QSIZE, RED_EWMA, RED_HOLT_WINTERS

Fields inherited from class drcl.comp.queue.QLogic

capacity, EVENT_QSIZE, qlen, qsize

Constructor Summary

FRED()

FRED(Component host_, java.lang.String avgpid_)

Method Summary

java.lang.String	adviceOn(java.lang.Object obj_, int psize_) Returns advice (in String) on whether or not to drop the packet.
int	classify(Packet pkt_) Returns the class the packet belongs to.
void	dequeueHandler(java.lang.Object obj_, int psize_) Handles the event of dequeuing the object of the given size.
void	duplicate(java.lang.Object source_) Duplicates the content of the source object to this object.
void	enqueueHandler(java.lang.Object obj_, int psize_) Handles the event of enqueuing the object of the given size.
PktClassifier	getClassifier()
java.lang.String	info(java.lang.String prefix_) Prints the content (states) of this queue management instance.
void	reset() Resets this object to the initial state.
void	setClassifier(PktClassifier c_)

Methods inherited from class drcl.inet.core.queue.RED

getBandwidth, getInvProb, getMaxThresh, getMeanPacketSize, getMinThresh, getSeed, getWeight, isMarkEnabled, isWait, setAvgQSizePort, setBandwidth, setInvProb, setMarkEnabled, setMaxThresh, setMeanPacketSize, setMinThresh, setRandomNumberGenerator, setRandomNumberGenerator, setREDParam, setSeed, setWait, setWeight

Methods inherited from class drcl.comp.queue.QLogic

dropHandler, getCapacity, getCurrentQLength, getCurrentQSize, getHost, info, isEmpty, isFull, set, setCapacity, setHost, setQSizePort

Methods inherited from class drcl.DrclObj

clone, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

SANITY_CHECK

public static boolean SANITY_CHECK

Constructor Detail

FRED

public FRED()

FRED

public FRED(Component host_,
            java.lang.String avgpid_)

Parameters:

avgpid_ - ID of the average queue size change event port that will be created at the host component.

Method Detail

reset

public void reset()

Description copied from class: QLogic

Resets this object to the initial state. Subclasses must call super.reset() when overriding this method.

Overrides:

reset in class RED

duplicate

public void duplicate(java.lang.Object source_)

Description copied from class: QLogic

Duplicates the content of the source object to this object. If the host component is already set, this method also creates the queue size change event port of the same ID as that in source_. Subclasses must call super.duplicate() when overriding this method.

Specified by:

duplicate in interface ObjectDuplicable

Overrides:

duplicate in class RED

info

public java.lang.String info(java.lang.String prefix_)

Description copied from class: QLogic

Prints the content (states) of this queue management instance.

Overrides:

info in class RED

classify

public int classify(Packet pkt_)

Description copied from interface: PktClassifier

Returns the class the packet belongs to.

Specified by:

classify in interface PktClassifier

setClassifier

public void setClassifier(PktClassifier c_)

getClassifier

public PktClassifier getClassifier()

adviceOn

public java.lang.String adviceOn(java.lang.Object obj_,
                                 int psize_)

Returns advice (in String) on whether or not to drop the packet. Returns false if not to drop the packet.

Overrides:

adviceOn in class RED

dequeueHandler

public void dequeueHandler(java.lang.Object obj_,
                           int psize_)

Description copied from class: QLogic

Handles the event of dequeuing the object of the given size.

Overrides:

dequeueHandler in class RED

enqueueHandler

public void enqueueHandler(java.lang.Object obj_,
                           int psize_)

Description copied from class: QLogic

Handles the event of enqueuing the object of the given size.

Overrides:

enqueueHandler in class RED