Name: dfR10049 Date: 01/19/2001



isMCGlobal() method of Inet4Address class does not work as expected.

According to rfc2365 the range of IPv4 multicast addresses with global scope is:
224.0.1.0 - 238.255.255.255. But the Inet4Address.isMCGlobal() incorrectly returns
false for addresses from this range.

This is the test demonstrating the bug:
========== Test.java ==============
import java.net.*;
import java.io.*;


public class Test {

    final static byte[][] MCGlobal_4 = {
        { (byte)224, 0, 1, 0 },
        { (byte)224, 0, 1, 1 },

        { (byte)225, 0, 0, 0 },
        { (byte)230, 11, 22, 33 },
        { (byte)237, -1, -1, -1 },

        { (byte)238, 0, 0, 0 },
        { (byte)238, -1, -1, -1 },
    };

    public static void main (String args[]){
       

        boolean passed = true;
        try {
            for (int i = 0; i < MCGlobal_4.length; i++) {
                Inet4Address address =
                    (Inet4Address)InetAddress.getByAddr(MCGlobal_4[i]);

                if (!address.isMCGlobal()) {
                    System.out.println(address + " has not global scope");
                    passed = false;
                };
           }
        } catch (Exception e) {
            System.out.println(" " + e);
            passed = false;
        }
    }
}

================================================
output from the test:

#> java Test
/224.0.1.0 has not global scope
/224.0.1.1 has not global scope
/225.0.0.0 has not global scope
/230.11.22.33 has not global scope
/237.255.255.255 has not global scope
/238.0.0.0 has not global scope
/238.255.255.255 has not global scope

#> java -version
java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b46)
Java HotSpot(TM) Client VM (build 1.4beta-B45, mixed mode)

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