test/jdk/java/net/Socket/B6210227.java

/*
 * Copyright (c) 2012, 2018, 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.
 */

/**
 * @test
 * @bug 6210227
 * @summary  REGRESSION: Socket.getLocalAddress() returns address of 0.0.0.0 on outbound TCP
 * @run main B6210227
 * @run main/othervm -Djava.net.preferIPv4Stack=true B6210227
 */

import java.util.*;
import java.net.*;

public class B6210227 {
    public static void main(String[] args) throws Exception
    {
        ServerSocket ss = new ServerSocket(0);
        int port = ss.getLocalPort();

        byte[] bad = {0,0,0,0};
        try {
            InetSocketAddress isa = new InetSocketAddress(InetAddress.getLocalHost(), port);
            Socket s = new Socket();
            s.connect( isa, 1000 );
            InetAddress iaLocal = s.getLocalAddress(); // if this comes back as 0.0. 0.0 this would demonstrate issue
            String      sLocalHostname = iaLocal.getHostName();
            if (Arrays.equals (iaLocal.getAddress(), bad)) {
                throw new RuntimeException ("0.0.0.0 returned");
            }
            System.out.println("local hostname is "+sLocalHostname );
        } catch(Exception e) {
            System.out.println("Exception happened");
            throw e;
        } finally {
            ss.close();
        }
    }
}