russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
65 lines
2.6 KiB
Java
65 lines
2.6 KiB
Java
/*
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* Copyright (c) 2015, 2025, 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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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.NetworkInterface;
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/**
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* @test
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* @bug 8135305
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* @key intermittent
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* @library /test/lib
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* @summary ensure we can't ping external hosts via loopback if
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* @run main IsReachableViaLoopbackTest
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*/
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public class IsReachableViaLoopbackTest {
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public static void main(String[] args) {
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try {
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InetAddress addr = InetAddress.getLoopbackAddress();
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InetAddress remoteAddr = InetAddress.getByName("23.197.138.208"); // use literal address to avoid DNS checks
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if (!addr.isReachable(10000))
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throw new RuntimeException("Localhost should always be reachable");
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NetworkInterface inf = NetworkInterface.getByInetAddress(addr);
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if (inf != null) {
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if (!addr.isReachable(inf, 20, 10000)) {
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throw new RuntimeException("Localhost should always be reachable");
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} else {
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System.out.println(addr + " is reachable");
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}
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if (remoteAddr.isReachable(inf, 20, 10000)) {
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throw new RuntimeException(remoteAddr + " is reachable");
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} else {
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System.out.println(remoteAddr + " is NOT reachable");
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}
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} else {
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System.out.println("inf == null");
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}
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} catch (IOException e) {
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throw new RuntimeException("Unexpected exception:" + e);
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}
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System.out.println("IsReachableViaLoopbackTest EXIT");
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}
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}
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