simnet
Class NATRouter.Connection

java.lang.Object
  simnet.NATRouter.Connection

Enclosing class:

NATRouter

class NATRouter.Connection

extends java.lang.Object

Class to store all relevant information about a given connection.

Field Summary

(package private) int	externalPort The port we will use to uniquely identify this connection to the outside world.
(package private) int	internalIP The NATted IP address of the sending node.
(package private) int	internalPort The port on which this connection was originally established.
(package private) int	lastSeqNum If this is a TCP connection, then use this field to match up ACKs to FINs
(package private) int	proto The protocol this connection uses.
(package private) NATRouter.StaleConnectionRemover	scr A TimerTask that will remove this connection when it is no longer in use.
(package private) long	timeOfLastUse The last time a packet was sent over this connection

Constructor Summary

NATRouter.Connection(int internalIP, int internalPort, int externalPort, int proto)
Create this connection.

Method Summary

java.lang.String	toString() Print out our basic stats.
void	updateUsage() Set the timeOfLastUse to the current time so TimerTasks will know that this connection is still active.

Methods inherited from class java.lang.Object

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

Field Detail

internalIP

int internalIP

The NATted IP address of the sending node.

internalPort

int internalPort

The port on which this connection was originally established.

externalPort

int externalPort

The port we will use to uniquely identify this connection to the outside world.

proto

int proto

The protocol this connection uses.

timeOfLastUse

long timeOfLastUse

The last time a packet was sent over this connection

scr

NATRouter.StaleConnectionRemover scr

A TimerTask that will remove this connection when it is no longer in use.

lastSeqNum

int lastSeqNum

If this is a TCP connection, then use this field to match up ACKs to FINs

Constructor Detail

NATRouter.Connection

public NATRouter.Connection(int internalIP,
                            int internalPort,
                            int externalPort,
                            int proto)

Create this connection. If this is not a TCP connection, create a new TimerTask to make sure that it is removed when it is stale.

Parameters:

internalIP - the original source address (NATted)

internalPort - the orignal port

externalPort - the port we will use on the outside to uniquely ID this connection

proto - The protocol of this connection

Method Detail

updateUsage

public void updateUsage()

Set the timeOfLastUse to the current time so TimerTasks will know that this connection is still active.

toString

public java.lang.String toString()

Print out our basic stats.