author | ssahoo |
Wed, 31 Aug 2016 08:34:59 -0700 | |
changeset 40682 | b08455408de7 |
parent 36622 | 9406773bccd5 |
child 40973 | c0727530b5d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2012, 2016, 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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/* |
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* @test |
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* @bug 7162687 8015595 |
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* @key intermittent |
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* @summary enhance KDC server availability detection |
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* @compile -XDignore.symbol.file Unreachable.java |
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* @run main/othervm 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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/** |
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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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} |