I have a customer *** running on Linux using our RC Linux JDK1.2.2
  with a testcase below that create datagram sockets to a host.

   The testcase works fine on our Solaris JDK, but fails with a
IOException "Connection refused" on Linux using RC2 Linux JDK1.2.2.
*** also noted that this bug appears in the RC3 JDK from Blackdown. This functionality is crucial to ***'s application.

***NOTE there are two test cases for the two problems seen here.
The test below is rather confusing...Brad ****


/*
A basic Java class stub for a Win32 Console Application.
 */
import java.net.*;
import java.io.*;

public class testudp {

public testudp () {

}

    static public void main(String args[]) {
        DatagramPacket rp;
        DatagramSocket s2host;
// English:
// own IP only with to generate the Socket one needs

        InetAddress ownIP; // eigene IP wird nur beim generieren des Socket ben÷tigt
        InetAddress toIP; // eigene IP wird nur beim generieren des Socket ben÷tigt
        byte [] recvbuf = new byte[1500]; // ReceiveBuffer
        int port;
        String srvIP;
        
        port = 7700;
        ownIP = null;
        srvIP = "10.10.10.174";
        //srvIP = "129.uuu.xxx.yyy"; // bongos
        // srvIP = "129.uuu.xxx.yyy"; // glimmer
        s2host = null;
        
        // socket wird ge÷ffnet
// English:
// Socket one opens
        try
        {
            ownIP = InetAddress.getLocalHost();
            s2host = new DatagramSocket(port, ownIP);
            System.out.println("Socket opened " + s2host);
        }
        catch(Exception e)
        {
            System.out.println(e.toString());
        }

        // Initialisierung des Timeouts f’r lesenden Zugriff auf den Socket
// English:
// Initialization of the Timeouts for reading access to the Socket
        try {
// English:
// if will not receive, after xx ms to abort
            s2host.setSoTimeout(30); // falls nicht empfangen wird, nach xx ms abbrechen
            System.out.println("Timeout set " + s2host);
        } catch(SocketException e) {
            System.out.println("setSoTiemout failed " + e.toString());
        }

        // der Versuch etwas zu empfangen
// English:
// the attempt something to receive
        rp = new DatagramPacket(recvbuf, 1500);

        try {
            s2host.receive(rp);
            System.out.println("Receive OK " + s2host);
        }
        catch (InterruptedIOException e)
        {
            System.out.println("receive ok but no data.");
        }
        catch(SocketException se)
        {
            System.out.println("SocketException " + se.toString());
        }
        catch(IOException ie)
        {
            System.out.println("IOException " + ie.toString());
        }

        // der versuch etwas zu senden
// English:
// the attempt something to transmit
        try
        {
            // Wegen Absturz Linux Test
// English:
// Because of crash Linux Test
            toIP = InetAddress.getByName(srvIP); // ZielAddresse, Targetaddress
            
            byte [] sendbuf = (new String("123456")).getBytes();
            rp = new DatagramPacket(sendbuf, 6, toIP, 7700);
            s2host.send(rp);
            System.out.println("Send OK ?!?!" + s2host);
        }
        catch (IOException e)
        {
            System.out.println("IOException beim Versenden " + e.toString());
        }

        // der Versuch etwas zu empfangen
// English:
// the attempt something to receive
        rp = new DatagramPacket(recvbuf, 1500);

        try {
            s2host.receive(rp);
            System.out.println("Receive OK " + s2host);
String myinput= new String(rp.getData());
System.out.println("rp.getData() ='" + myinput + "'");
        }
        catch (InterruptedIOException e)
        {
            System.out.println("receive Interrupted Exception is ok.");
        }
        catch(SocketException se)
        {
            System.out.println("Why ??? should work but : " + se.toString());
        }
        catch(IOException ie)
        {
            System.out.println("IOException " + ie.toString());
        }

    }

}