132 lines
5.4 KiB
Java
132 lines
5.4 KiB
Java
/*
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* Copyright (c) 2012, 2018, 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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/*
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* @test
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* @bug 7162687 8015595 8194486
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* @summary enhance KDC server availability detection
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* @library /test/lib
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* @compile -XDignore.symbol.file Unreachable.java
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* @run main jdk.test.lib.FileInstaller TestHosts TestHosts
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* @run main/othervm -Djdk.net.hosts.file=TestHosts Unreachable
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*/
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import java.net.PortUnreachableException;
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import java.net.SocketTimeoutException;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetSocketAddress;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Future;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.TimeoutException;
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import java.util.concurrent.Executors;
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import javax.security.auth.login.LoginException;
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import sun.security.krb5.Config;
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public class Unreachable {
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// Wait for 20 second until unreachable KDC throws PortUnreachableException.
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private static final int TIMEOUT = 20;
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private static final String REALM = "RABBIT.HOLE";
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private static final String HOST = "127.0.0.1";
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private static final int PORT = 13434;
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private static final String KRB_CONF = "unreachable.krb5.conf";
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public static void main(String[] args) throws Exception {
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// - Only PortUnreachableException will allow to continue execution.
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// - SocketTimeoutException may occur on Mac because it will not throw
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// PortUnreachableException for unreachable port in which case the Test
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// execution will be skipped.
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// - For Reachable port, the Test execution will get skipped.
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// - Any other Exception will be treated as Test failure.
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if (!findPortUnreachableExc()) {
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System.out.println(String.format("WARNING: Either a reachable "
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+ "connection found to %s:%s or SocketTimeoutException "
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+ "occured which means PortUnreachableException not thrown"
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+ " by the platform.", HOST, PORT));
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return;
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}
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KDC kdc = KDC.existing(REALM, HOST, PORT);
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KDC.saveConfig(KRB_CONF, kdc);
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ExecutorService executor = Executors.newSingleThreadExecutor();
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Future<Exception> future = executor.submit(new Callable<Exception>() {
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@Override
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public Exception call() {
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System.setProperty("java.security.krb5.conf", KRB_CONF);
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try {
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Config.refresh();
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// If PortUnreachableException is not received, the login
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// will consume about 3*3*30 seconds and the test will
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// timeout.
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try {
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Context.fromUserPass("name", "pass".toCharArray(), true);
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} catch (LoginException le) {
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// This is OK
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}
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System.out.println("Execution successful.");
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} catch (Exception e) {
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return e;
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}
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return null;
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}
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});
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try {
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Exception ex = null;
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if ((ex = future.get(TIMEOUT, TimeUnit.SECONDS)) != null) {
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throw new RuntimeException(ex);
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}
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} catch (TimeoutException e) {
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future.cancel(true);
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throw new RuntimeException("PortUnreachableException not thrown.");
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} finally {
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executor.shutdownNow();
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}
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}
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/**
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* If the remote destination to which the socket is connected does not
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* exist, or is otherwise unreachable, and if an ICMP destination unreachable
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* packet has been received for that address, then a subsequent call to
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* send or receive may throw a PortUnreachableException. Note, there is no
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* guarantee that the exception will be thrown.
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*/
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private static boolean findPortUnreachableExc() throws Exception {
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try {
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InetSocketAddress iaddr = new InetSocketAddress(HOST, PORT);
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DatagramSocket dgSocket = new DatagramSocket();
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dgSocket.setSoTimeout(5000);
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dgSocket.connect(iaddr);
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byte[] data = new byte[]{};
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dgSocket.send(new DatagramPacket(data, data.length, iaddr));
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dgSocket.receive(new DatagramPacket(data, data.length));
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} catch (PortUnreachableException e) {
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return true;
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} catch (SocketTimeoutException e) {
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return false;
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}
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return false;
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}
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}
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