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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * 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
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 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 */
package test.java.net.InetAddress;

/**
 * @test
 * @bug 8135305
 * @key intermittent
 * @summary ensure we can't ping external hosts via loopback if
 */

import java.io.*;
import java.net.*;
import java.util.*;
import org.testng.annotations.Test;
import static org.testng.Assert.fail;

public class IsReachableViaLoopbackTest {
    @Test
    public void testReachableViaLoopback() {
        try {
            InetAddress addr = InetAddress.getByName("localhost");
            // Android-changed: use alternative DNS address (b/255943063#comment49)
            // and switch to literal address to avoid DNS lookup flakes.
            // InetAddress remoteAddr = InetAddress.getByName("bugs.openjdk.java.net");
            InetAddress remoteAddr = InetAddress.getByAddress(new byte[]{8, 8, 8, 8});
            if (!addr.isReachable(10000))
                fail("Localhost should always be reachable");
            NetworkInterface inf = NetworkInterface.getByInetAddress(addr);
            if (inf != null) {
                if (!addr.isReachable(inf, 20, 10000)) {
                    fail("Localhost should always be reachable");
                } else {
                }
                if (remoteAddr.isReachable(inf, 20, 10000)) {
                    fail(remoteAddr + " is reachable");
                } else {
                }
            }

        } catch (IOException e) {
           fail("Unexpected exception:" + e);
        }
    }
}