test/jdk/java/net/Socket/GetLocalAddress.java

/*
 * Copyright (c) 1998, 2019, 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
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 * questions.
 */

/*
 * @test
 * @bug 4106601 8026245 8071424
 * @library /test/lib
 * @run main/othervm GetLocalAddress
 * @run main/othervm -Djava.net.preferIPv4Stack=true GetLocalAddress
 * @run main/othervm -Djava.net.preferIPv6Addresses=true GetLocalAddress
 * @summary Test the java.net.socket.GetLocalAddress method
 *
 */

import java.net.*;
import jdk.test.lib.net.IPSupport;

public class GetLocalAddress implements Runnable {
    static ServerSocket ss;
    static InetAddress addr;
    static int port;

    public static void main(String args[]) throws Exception {
        IPSupport.throwSkippedExceptionIfNonOperational();

        testBindNull();

        boolean      error = true;
        int          linger = 65546;
        int          value = 0;
        addr = InetAddress.getLocalHost();
        ss = new ServerSocket();
        ss.bind(new InetSocketAddress(addr, 0));
        port = ss.getLocalPort();

        Thread t = new Thread(new GetLocalAddress());
        t.start();
        Socket soc = ss.accept();

        if(addr.equals(soc.getLocalAddress())) {
           error = false;
           }
        if (error)
            throw new RuntimeException("Socket.GetLocalAddress failed.");
        soc.close();
    }

    public void run() {
        try {
            Socket s = new Socket(addr, port);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    static void testBindNull() throws Exception {
        try (Socket soc = new Socket()) {
            soc.bind(null);
            if (!soc.isBound())
                throw new RuntimeException(
                    "should be bound after bind(null)");
            if (soc.getLocalPort() <= 0)
                throw new RuntimeException(
                   "bind(null) failed, local port: " + soc.getLocalPort());
            if (soc.getLocalAddress() == null)
                 throw new RuntimeException(
                   "bind(null) failed, local address is null");
        }
    }
}