Name: yyC67448 Date: 11/11/97



The java.net.DatagramPacket.setLength(int length) method does not check
length for negative values.

Here is the test demonstrating the bug:

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

import java.net.*;


class test
{

  public static void main(String args[])
  {
    DatagramPacket pac = null;
    byte[] ar = new byte[10];
    int len = -2;

    try {
      pac = new DatagramPacket(ar, ar.length);
    } catch(Exception e)
    {
      System.out.println("Failed. Can not create DatagramPacket:" + e);
      System.exit(-1);
    }
    
    try {
      pac.setLength(len);
    } catch(IllegalArgumentException e)
    {
        System.out.println("OKAY");
System.exit(0);
    }
    catch(Exception e)
    {
      System.out.println("Failed. Unexpected exception:" + e);
      System.exit(-1);
    }
    
    System.out.println("Failed. No exceptions.");

  }

}

---------------------- Output from the test -----------------
Failed. No exceptions.
-----------------------------------------------------------------
======================================================================