FULL PRODUCT VERSION :
java version "1.7.0"
Java(TM) SE Runtime Environment (build 1.7.0-b147)
Java HotSpot(TM) 64-Bit Server VM (build 21.0-b17, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7600]

EXTRA RELEVANT SYSTEM CONFIGURATION :
IP: 192.168.0.103 Subnetmask: 255.255.255.000

A DESCRIPTION OF THE PROBLEM :
I'm trying to get a subnet prefix with InterfaceAddress.getNetworkPrefixLength() but it always returns 128 (except 127.0.0.1 this returns 8).

It is exactly the same bug like this one:  http://bugs.sun.com/view_bug.do?bug_id=6707289

The above bug is marked is fixed but I don't think that it is fixed!



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public static void main(String[] args) throws Exception {
        Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces();
        while (ifaces.hasMoreElements()) {
            NetworkInterface iface = ifaces.nextElement();
            for (InterfaceAddress ifaceAddress : iface.getInterfaceAddresses()) {
                System.out.println("iface " + iface.getName() +
                                   " has address " + ifaceAddress.getAddress() +
                                   "/" + ifaceAddress.getNetworkPrefixLength());
            }
        }
    }
---------- END SOURCE ----------