java.net.DatagramPacket constructor allows length < 0

Name: yyC67448 Date: 11/11/97



The constructor java.net.DatagramPacket(byte[], int) does not check it's second
parameter (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[] array = new byte[20];
    int len = -10;
    
    try {
      pac = new DatagramPacket(array, len);
    } catch(IllegalArgumentException e)
    {
      System.out.println("OKAY");
      System.exit(0);
    }
    catch(Exception e)
    {
      System.out.println("Failed. Can not create DatagramPacket:" + e);
      System.exit(-1);
    }
    
    System.out.println("Failed. No Exceptions.");

  }

}

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