import java.io.*;

import java.net.*;

import java.util.*;

/**

 * @test

 * @bug 8135305

 * @key intermittent

 * @summary ensure we can't ping external hosts via loopback if

 */

public class IsReachableViaLoopbackTest {

    public static void main(String[] args) {

        try {

            InetAddress addr = InetAddress.getByName("localhost");

            InetAddress remoteAddr = InetAddress.getByName("bugs.openjdk.java.net");

            if (!addr.isReachable(10000))

                throw new RuntimeException("Localhost should always be reachable");

            NetworkInterface inf = NetworkInterface.getByInetAddress(addr);

            if (inf != null) {

                if (!addr.isReachable(inf, 20, 10000)) {

                    throw new RuntimeException("Localhost should always be reachable");

                } else {

                    System.out.println(addr + "  is reachable");

                }

                if (remoteAddr.isReachable(inf, 20, 10000)) {

                    throw new RuntimeException(remoteAddr + " is reachable");

                } else {

                    System.out.println(remoteAddr + "  is NOT reachable");

                }

            } else {

                System.out.println("inf == null");

            }

        } catch (IOException e) {

            throw new RuntimeException("Unexpected exception:" + e);

        }

        System.out.println("IsReachableViaLoopbackTest EXIT");

    }

}