net.clackrouter.component.simplerouter
Class ARPLookup

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

All Implemented Interfaces:

Alarm

public class ARPLookup
extends ClackComponent

Contains ARP cache, sends ARP requests, handles ARP replies, and supplies Ethernet Destination addresses based on next hop addresses for packets.

Nested Class Summary

class

ARPLookup.CacheEntry Data structure representing a single ARP Cache entry

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

ClackComponent.Waiter

Field Summary

static int	DEFAULT_CACHE_TIMEOUT
static int	DEST_UNREACH_TIMER
static int	MAX_QUEUE_PACKETS
static int	NUM_PORTS
static int	PORT_IP_IN
static int	PORT_OUT
static int	PORT_REPLY_IN

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

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

Method Summary

void	acceptPacket(VNSPacket packet, int port_number) Handles both incoming ARP Replies and Outgoing IP packets needing an destination Ethernet address
void	addARPCacheEntry(java.lang.String interface_name, java.net.InetAddress ip, EthernetAddress hw) Adds an entry to the ARP cache
java.util.Hashtable	getARPCache()
java.awt.Color	getColor() The color this component should be rendered in, assuming a standard component rendering by the ComponentView.ComponentRenderer class.
javax.swing.JPanel	getPropertiesView() Method for getting the properties view associated with this component Property views are used to display more detailed information about internal component state.
boolean	removeARPCacheEntry(java.lang.String interface_name, java.net.InetAddress ip) Removes an entry in the specified ARP cache
protected void	setupPorts(int num_ports) 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, 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_REPLY_IN

public static int PORT_REPLY_IN

PORT_IP_IN

public static int PORT_IP_IN

PORT_OUT

public static int PORT_OUT

NUM_PORTS

public static int NUM_PORTS

DEFAULT_CACHE_TIMEOUT

public static int DEFAULT_CACHE_TIMEOUT

DEST_UNREACH_TIMER

public static int DEST_UNREACH_TIMER

MAX_QUEUE_PACKETS

public static int MAX_QUEUE_PACKETS

Constructor Detail

ARPLookup

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

Method Detail

setupPorts

protected void setupPorts(int num_ports)

Description copied from class: ClackComponent

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

Overrides:

setupPorts in class ClackComponent

Parameters:

num_ports - the number of ports to create

acceptPacket

public void acceptPacket(VNSPacket packet,
                         int port_number)

Handles both incoming ARP Replies and Outgoing IP packets needing an destination Ethernet address

Overrides:

acceptPacket in class ClackComponent

Parameters:

packet - The pushed packet

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

getPropertiesView

public javax.swing.JPanel getPropertiesView()

Description copied from class: ClackComponent

Method for getting the properties view associated with this component Property views are used to display more detailed information about internal component state. This method creates a default property view, and can be overriden to provide custom properties views

Overrides:

getPropertiesView in class ClackComponent

Returns:

this component's property view

getARPCache

public java.util.Hashtable getARPCache()

removeARPCacheEntry

public boolean removeARPCacheEntry(java.lang.String interface_name,
                                   java.net.InetAddress ip)

Removes an entry in the specified ARP cache

Parameters:

interface_name - interface of the entry to remove

ip - IP address of entry to remove

Returns:

true if an actual entry was removed, false otherwise.

addARPCacheEntry

public void addARPCacheEntry(java.lang.String interface_name,
                             java.net.InetAddress ip,
                             EthernetAddress hw)

Adds an entry to the ARP cache

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