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/*
* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 6707289 7107883
* @summary InterfaceAddress.getNetworkPrefixLength() does not conform to Javadoc
*/
import java.net.InetAddress;
import java.net.Inet4Address;
import java.net.InterfaceAddress;
import java.net.NetworkInterface;
import java.util.Enumeration;
import static java.lang.System.out;
public class NetworkPrefixLength {
static boolean passed = true;
public static void main(String[] args) throws Exception {
Enumeration<NetworkInterface> nics = NetworkInterface.getNetworkInterfaces();
while (nics.hasMoreElements()) {
NetworkInterface nic = nics.nextElement();
for (InterfaceAddress iaddr : nic.getInterfaceAddresses()) {
boolean valid = checkPrefix(iaddr);
if (!valid) {
passed = false;
debug(nic.getName(), iaddr);
}
InetAddress ia = iaddr.getAddress();
if (ia.isLoopbackAddress() && ia instanceof Inet4Address) {
// assumption: prefix length will always be 8
if (iaddr.getNetworkPrefixLength() != 8) {
out.println("Expected prefix of 8, got " + iaddr);
passed = false;
}
}
}
}
if (!passed)
throw new RuntimeException("Failed: some interfaces have invalid prefix lengths");
}
static boolean checkPrefix(InterfaceAddress iaddr) {
InetAddress addr = iaddr.getAddress();
if (addr instanceof Inet4Address)
return checkIPv4PrefixLength(iaddr.getNetworkPrefixLength());
else
return checkIPv6PrefixLength(iaddr.getNetworkPrefixLength());
}
static boolean checkIPv4PrefixLength(int prefix) {
if (prefix >=0 && prefix <= 32)
return true;
return false;
}
static boolean checkIPv6PrefixLength(int prefix) {
if (prefix >=0 && prefix <= 128)
return true;
return false;
}
static void debug(String nicName, InterfaceAddress iaddr) {
out.println("NIC " + nicName + " has an address with an invalid prefix length:\n" + iaddr);
}
}
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