| /* |
| * Copyright (c) 2010, 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); |
| } |
| } |
| |