net.clackrouter.component.extension
Class UDP

java.lang.Object
  net.clackrouter.component.base.ClackComponent
      net.clackrouter.component.extension.UDP

All Implemented Interfaces:

Alarm

public class UDP
extends ClackComponent

Simplified implementation of the User Datagram Protocol (UDP).

Takes care of UDP's main functions of performing a checksum and demultiplexing packets by port

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_FROM_NET
static int	PORT_TO_NET
static int	PORT_UNREACH

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

UDP(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.
void	addMapping(java.net.InetAddress addr, int port, UDPSocket sock) Adds a local address / port binding to the UDP stack
void	sendPacket(VNSUDPPacket packet) Interface for packets to be send by UDP sockets.
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_FROM_NET

public static final int PORT_FROM_NET

See Also:

Constant Field Values

PORT_TO_NET

public static final int PORT_TO_NET

See Also:

Constant Field Values

PORT_UNREACH

public static final int PORT_UNREACH

See Also:

Constant Field Values

NUM_PORTS

public static final int NUM_PORTS

See Also:

Constant Field Values

Constructor Detail

UDP

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

Method Detail

setupPorts

public 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

sendPacket

public void sendPacket(VNSUDPPacket packet)

Interface for packets to be send by UDP sockets.

Parameters:

packet -

addMapping

public void addMapping(java.net.InetAddress addr,
                       int port,
                       UDPSocket sock)
                throws java.lang.Exception

Adds a local address / port binding to the UDP stack

Parameters:

addr -

port -

sock -

Throws:

java.lang.Exception - if another socket is already bound to this IP / UDP port pair