IPv6 and SIP

Project goals

The purpose of this project is to implement an IPv6 tunnel in pure Java which will be deployed on J2SE and on the Android platform. With the aid of this library it will be possible to use IPv6 on an IPv4 only Android phone and/or network. A web-applet will be implemented using the same library to allow IPv6 SIP calls from a web page.

Also the Android Linux kernel will be upgraded with IPv6. The project is sponsored by NLnet Foundation.

Implementation

M1

M1 has been implemented as a proof of concept. The Android application ipv6 can be downloaded. This application is an UDP server on port 1234. When you send text a response will appear with the text capitalized.

Screenshot of ipv6 application running on an Android

screenshot of nc6 which is used as an UDP client communicating with Android UDP server through port 1234

M2: jipv6 extentions

Preliminary jipv6 javadoc is available. The nl.mansoft package contains a class Jipv6DatagramSocketImpl which implements DatagramSocketImpl . The documentation will be soon improved and the jipv6 extensions will published on sourceforge.

package nl.mansoft;

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.util.Date;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Jipv6UDPTest {
    public static void ClientTest(String hostname) throws IOException 
    {
		System.out.println("ClientTest()");
		InetAddress address = InetAddress.getByName(hostname);
		// get a datagram socket
		DatagramSocket socket = new DatagramSocket();
//		DatagramSocket socket = new DatagramSocket(10001);
//		socket.connect(address, 1234);

		// send request
		byte[] buf = new byte[256];
		DatagramPacket packet = new DatagramPacket(buf, buf.length, address, 1234);
//		DatagramPacket packet = new DatagramPacket(buf, buf.length);
		packet.setData(new Date().toString().getBytes());
		socket.send(packet);

		// get response
		packet = new DatagramPacket(buf, buf.length);
		socket.receive(packet);

		// display response
		String received = new String(packet.getData(), 0, packet.getLength());
		System.out.println("Response: " + received);

		socket.close();
    }
    
    public static void ServertTest() throws IOException 
    {
		System.out.println("ServerTest()");
		// get a datagram socket
		DatagramSocket socket = new DatagramSocket(1234);

		byte[] buf = new byte[256];
		DatagramPacket packet = new DatagramPacket(buf, buf.length);

        while (true)
        {
            // get request
            packet = new DatagramPacket(buf, buf.length);
            socket.receive(packet);
            String data = new String(packet.getData(), 0, packet.getLength());

            // send response
            packet.setData(data.toUpperCase().getBytes());
            socket.send(packet);
        }
//		socket.close();
    }
    public static void Test(String[] args) throws IOException
    {
        if (args.length == 1)
            ServertTest();
        else
            ClientTest(args[1]);
    }
    
    public static void Usage()
    {
        System.out.println("Jipv6UDPTest  [IPv6 server]");
    }
	public static void main(String[] args){
        if (args.length == 0)
        {
            Usage();
        }
        else
        {
            try {
                Jipv6DatagramSocketImpl.connect6bed4(args[0]);
                DatagramSocket.setDatagramSocketImplFactory(new Jipv6DatagramSocketImplFactory());
                Test(args);
            } catch (IOException ex) {
                Logger.getLogger(Jipv6UDPTest.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
	}
}

java -cp jipv6.jar nl.mansoft.Jipv6UDPTest 145.100.190.242

java -cp jipv6.jar nl.mansoft.Jipv6UDPTest 145.100.190.242 

*** Tunneled packet received!!!
IPv6 packet received!
IPv6: from 2001:0610:0188:2001:524b:5922:c79e:0012
 to 2001:0610:0188:2001:524b:5922:c7a0:0012
 NxHdr: 17
#### PACKET FOR ME!!! 17
UDP Packet srcPort: 1234 destPort: 44444
UDP length: 36
Receiving packet...
Response: TUE NOV 15 16:32:44 CET 2011

Issues with jipv6 DatagramSocketImpl

IPv4 no longer available

DNS not available when using applets or webstart

public static InetAddress nl.mansoft.Jipv6Utils.getByName(String hostName) throws UnknownHostException

Timeline