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