net.clackrouter.component.tcp
Class ValidateChecksum

java.lang.Object
  net.clackrouter.component.base.ClackComponent
      net.clackrouter.component.tcp.ValidateChecksum

All Implemented Interfaces:

Alarm

public class ValidateChecksum
extends ClackComponent

TCP Subcomponent used to validate the checksum of an incoming TCP segment.

Segments with valid checksums are sent to one output port, and packets with invalid checksums are sent to the other.

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_IP_IN
static int	PORT_IP_INVALID
static int	PORT_TCP_VALID

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

ValidateChecksum(TCB tcb, Router router, java.lang.String name)

Method Summary

void	acceptPacket(VNSPacket packet, int port_num) The starting point for packet-processing when packets are "pushed" to this component.
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, getColor, 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_IP_IN

public static int PORT_IP_IN

PORT_IP_INVALID

public static int PORT_IP_INVALID

PORT_TCP_VALID

public static int PORT_TCP_VALID

NUM_PORTS

public static int NUM_PORTS

Constructor Detail

ValidateChecksum

public ValidateChecksum(TCB tcb,
                        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_num)

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