net.clackrouter.component.simplerouter
Class IPTTLDec

java.lang.Object
  net.clackrouter.component.base.ClackComponent
      net.clackrouter.component.simplerouter.IPTTLDec

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Alarm

public class IPTTLDec
extends ClackComponent
implements java.lang.Cloneable, java.io.Serializable

Decrements the Time-to-Live field of the IP header for packets being forwarded through this router.

If the TTL value is greater than zero after decrement the packet is sent out one port to be forwarded, otherwise it is sent out a different port to generate an ICMP TTL-exceeded message.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class net.clackrouter.component.base.ClackComponent

ClackComponent.Waiter

Field Summary

static int	NUM_PORTS
static int	PORT_IN
static int	PORT_OUT
static int	TTL_XCD

Fields inherited from class net.clackrouter.component.base.ClackComponent

componentCell, m_has_error, m_log, m_name, m_num_ports, m_packetcount_in, m_packetcount_out, m_ports, mListeners, mRouter, pendingError, SIGNAL_ERROR_LEN_MSEC, UNIQUE_COUNT, view

Constructor Summary

IPTTLDec(Router router, java.lang.String name)

Method Summary

void	acceptPacket(VNSPacket packet, int port_number) The starting point for packet-processing when packets are "pushed" to this component.
java.awt.Color	getColor() The color this component should be rendered in, assuming a standard component rendering by the ComponentView.ComponentRenderer class.
protected void	setupPorts(int numports) Allocates an array of ClackPort objects to be used by this component

Methods inherited from class net.clackrouter.component.base.ClackComponent

createCopy, createInputPullPort, createInputPushPort, createOutputPullPort, createOutputPushPort, error, fireListeners, getComponentCell, getHierarchicalView, getLog, getName, getNumPorts, getPacketCountIn, getPacketCountOut, getPendingError, getPort, getPropertiesView, getRouter, getSerializableProperties, getTime, getTypeName, getUniqueCount, getView, handlePullRequest, hasError, initializeProperties, isHierarchical, isModifying, log, notifyAlarm, poll, registerListener, sendOutPort, setAlarm, setComponentCell, setName, setPendingError, setView, showErrorDialog, signalError, try_repaint, unregisterListener

Methods inherited from class java.lang.Object

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

Field Detail

PORT_IN

public static int PORT_IN

PORT_OUT

public static int PORT_OUT

TTL_XCD

public static int TTL_XCD

NUM_PORTS

public static int NUM_PORTS

Constructor Detail

IPTTLDec

public IPTTLDec(Router router,
                java.lang.String name)

Method Detail

setupPorts

protected void setupPorts(int numports)

Description copied from class: ClackComponent

Allocates an array of ClackPort objects to be used by this component

Overrides:

setupPorts in class ClackComponent

Parameters:

numports - the number of ports to create

acceptPacket

public void acceptPacket(VNSPacket packet,
                         int port_number)

Description copied from class: ClackComponent

The starting point for packet-processing when packets are "pushed" to this component.

The default implementation warns that the packet is being ignored.

Overrides:

acceptPacket in class ClackComponent

Parameters:

packet - The pushed packet

port_number - The number of the port that this packet is arriving on

getColor

public java.awt.Color getColor()

Description copied from class: ClackComponent

The color this component should be rendered in, assuming a standard component rendering by the ComponentView.ComponentRenderer class.

Other renderers may ignore this value.

Overrides:

getColor in class ClackComponent

Returns:

the rendering color