78 lines
2.8 KiB
Java
78 lines
2.8 KiB
Java
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/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @bug 8059309
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* @summary Test that querrying the mac address of the loopback interface
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* returns null and doesn't throw a SocketException.
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* @library /test/lib
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* @run testng/othervm NullMacAddress
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* @run testng/othervm -Djava.net.preferIPv6Addresses=true NullMacAddress
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* @run testng/othervm -Djava.net.preferIPv4Stack=true NullMacAddress
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*/
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import org.testng.annotations.BeforeTest;
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import org.testng.annotations.Test;
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import static org.testng.Assert.*;
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import java.io.UncheckedIOException;
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import java.math.BigInteger;
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import java.net.NetworkInterface;
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import java.net.SocketException;
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import java.util.Locale;
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import jdk.test.lib.net.IPSupport;
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public class NullMacAddress {
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@BeforeTest
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void setup() {
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IPSupport.throwSkippedExceptionIfNonOperational();
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}
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@Test
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public void testNetworkInterfaces() throws SocketException {
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NetworkInterface.networkInterfaces().forEach(this::testMacAddress);
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}
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private void testMacAddress(NetworkInterface ni) {
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try {
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var name = ni.getDisplayName();
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System.out.println("Testing: " + name);
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var loopback = ni.isLoopback();
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var macAddress = ni.getHardwareAddress();
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var hdr = macAddress == null ? "null"
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: "0x" + new BigInteger(1, macAddress)
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.toString(16).toUpperCase(Locale.ROOT);
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System.out.println(" MAC address: " + hdr + (loopback ? " (loopback)" : ""));
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if (loopback) {
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assertNull(macAddress, "Loopback interface \""
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+ name + "\" doesn't have a null MAC Address");
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}
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} catch (SocketException ex) {
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throw new UncheckedIOException(ex);
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}
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}
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}
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