com.lightdev.app.ddnscl.net
Class DynDnsIPChecker

java.lang.Object

  java.lang.Thread

      com.lightdev.app.ddnscl.net.DynDnsIPChecker

All Implemented Interfaces:

Runnable

public class DynDnsIPChecker

extends Thread

This class uses the web based IP detection service of www.dyndns.org to find out the IP address a machine is connected to the internet under.

This is useful, when a client connects through a router and the client can not determine the IP address under which the router connects to the internet.

The class assumes the reply to be in the format DnyDNS.org used at the time this class was created:

   

     

       

     

     

       Current IP Address: 217.233.199.126

     

   

 

Important: the service at DynDNS.org has a limit of once every 10 minutes.

Version:

1, July 11, 2004

Author:

Ulrich Hilger, Light Development, http://www.lightdev.com, info@lightdev.com, published under the terms and conditions of the GNU General Public License, for details see file gpl.txt in the distribution package of this software as well as any licensing notes inside this documentation

Nested Class Summary

static interface

DynDnsIPChecker.DynDnsIPCheckerListener A class using a DynDnsIPChecker thread needs to implement this interface inorder to be notified when an IP address was received

Field Summary

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

DynDnsIPChecker(DynDnsIPChecker.DynDnsIPCheckerListener l)
constructor

Method Summary

void	detectIPAddress() initiate this thread, i.e. call method 'run' to connect to the given address (default is checkip.dyndns.org) and wait to receive the public IP address returned by respective address
String	getIP() get the received IP
void	run() run this thread, i.e. connect to the given address (default is checkip.dyndns.org) and wait until the public IP address is returned by respective address.
void	setRequestReceiver(String address) set the address to request an IP check at (e.g. checkip.dyndns.org) If the address is not set explicitly with this method, the default address checkip.dyndns.org is used.

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

DynDnsIPChecker

public DynDnsIPChecker(DynDnsIPChecker.DynDnsIPCheckerListener l)

constructor

Parameters:

l - DynDnsIPCheckerListener the listener to notify when the IP was received

Method Detail

setRequestReceiver

public void setRequestReceiver(String address)

set the address to request an IP check at (e.g. checkip.dyndns.org)

If the address is not set explicitly with this method, the default address checkip.dyndns.org is used.

Parameters:

address - String the address to request an IP at

getIP

public String getIP()

get the received IP

Returns:

String the IP

detectIPAddress

public void detectIPAddress()

initiate this thread, i.e. call method 'run' to connect to the given address (default is checkip.dyndns.org) and wait to receive the public IP address returned by respective address

See Also:

run

run

public void run()

run this thread, i.e. connect to the given address (default is checkip.dyndns.org) and wait until the public IP address is returned by respective address. Once recieved, parse the response, store the IP address found and notify the listener that an IP address is present.