| /* |
| * Copyright (c) 2002, 2020, 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. |
| */ |
| |
| import javax.naming.CommunicationException; |
| import javax.naming.Context; |
| import javax.naming.directory.InitialDirContext; |
| |
| /* |
| * @test |
| * @bug 8200151 |
| * @summary Tests that when a DNS server is unreachable and an ICMP Destination |
| * Unreachable packet is received, we fail quickly and don't wait for |
| * the full timeout interval. This could be caused, for example, by a |
| * dead DNS server or a flakey router. |
| * On AIX, no ICMP Destination Unreachable is received, so skip test. |
| * @requires os.family != "aix" |
| * @library ../lib/ |
| * @modules java.base/sun.security.util |
| * @run main PortUnreachable |
| */ |
| |
| public class PortUnreachable extends DNSTestBase { |
| |
| // Port 25 is the SMTP port, used here to simulate a dead DNS server. |
| private static final int PORT = 25; |
| |
| // Threshold in ms for elapsed time of request failed. Normally, it should |
| // be very quick, but consider to different platform and test machine |
| // performance, here we define 3000 ms as threshold which acceptable for |
| // this test. |
| private static final int THRESHOLD = 3000; |
| |
| private long startTime; |
| |
| public PortUnreachable() { |
| setLocalServer(false); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new PortUnreachable().run(args); |
| } |
| |
| /* |
| * Tests that when a DNS server is unreachable and an ICMP Destination |
| * Unreachable packet is received, we fail quickly and don't wait for |
| * the full timeout interval. |
| */ |
| @Override |
| public void runTest() throws Exception { |
| String deadServerUrl = "dns://localhost:" + PORT; |
| env().put(Context.PROVIDER_URL, deadServerUrl); |
| setContext(new InitialDirContext(env())); |
| |
| // Any request should fail quickly. |
| startTime = System.currentTimeMillis(); |
| context().getAttributes(""); |
| |
| // You're running a DNS server on your SMTP port? |
| throw new RuntimeException( |
| "Failed: getAttributes succeeded unexpectedly"); |
| } |
| |
| @Override |
| public boolean handleException(Exception e) { |
| if (e instanceof CommunicationException) { |
| long elapsedTime = System.currentTimeMillis() - startTime; |
| |
| Throwable cause = ((CommunicationException) e).getRootCause(); |
| if (!(cause instanceof java.net.PortUnreachableException)) { |
| DNSTestUtils.debug("Bug 7164518 can cause this failure on mac"); |
| return false; |
| } |
| |
| DNSTestUtils.debug("Elapsed (ms): " + elapsedTime); |
| |
| // Check that elapsed time is less than defined threshold. |
| if (elapsedTime < THRESHOLD) { |
| return true; |
| } |
| |
| throw new RuntimeException("Failed: call took " + elapsedTime |
| + " ms, expected less than " + THRESHOLD + " ms"); |
| } |
| |
| return super.handleException(e); |
| } |
| } |