Name: mgC56079 Date: 09/05/97



The java.net.DatagramSocket.send(DatagramPacket) method does not send any
packets if it's data has zero length on Solaris 2.4, 2.5.x, no IOException
will be thrown.

Here is the test demonstrating the bug:

-------------------------------- Test.java -----------------------------

import java.net.*;

public class Test {
  public static void main( String argv[] ) {
     DatagramSocket soc=null;
     DatagramSocket server = null;
     DatagramPacket pac=null;
     int port = 6768;
     int server_port = 6869;
     byte[] array = new byte[10];
     byte array1[] = new byte[0];


    // Try to create datagram socket...
    try {
       soc = new DatagramSocket();
    } catch(Exception e)
    {
       System.out.println("Failed: Can not create DatagramSocket instance " + e);
       System.exit(0);
    }

    // Try to create test server
    try {
       server = new DatagramSocket(server_port);
    } catch(Exception e)
    {
       soc.close();
       System.out.println("Failed: Can not create test server " + e + ": possible port " + server_port + " already in use");
       System.exit(0);
    }

    pac = new DatagramPacket(array, array.length);

    try {
         server.setSoTimeout(1000);
         soc.send(new DatagramPacket(array1, array1.length, InetAddress.getLocalHost(), server_port));
         server.receive(pac);
         server.setSoTimeout(0);
    } catch(java.io.InterruptedIOException e)
    {
        soc.close();
        server.close();
        System.out.println("Failed: No packets received... Timeout expired.");
System.exit(0);
     }
     catch(Exception e)
     {
        soc.close();
        server.close();
        System.out.println("Failed: unexpected exception during send/receive data:" +e);
        System.exit(0);
     }


     if(pac.getLength() == 0 )
     {
         soc.close();
         server.close();
         System.out.println("Test passed: OKAY");
System.exit(0);
     }

     soc.close();
     server.close();
     System.out.println("Failed: Send/received data mismatch");
     System.exit(0);
  


  }

}

---------------- Output from the test on Solaris 2.4, 2.5.x --------------
Failed: No packets received... Timeout expired.
--------------------------------------------------------------------------

---------------- Output from the test on Solaris 2.6, Win32 --------------
Test passed: OKAY
--------------------------------------------------------------------------


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