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Datei: TestClose.java Sprache: JAVA

/*
* Copyright (c) 2001, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 4408755
* @library /test/lib
* @summary This tests whether it's possible to get some informations
*          out of a closed socket. This is for backward compatibility
*          purposes.
* @run main TestClose
* @run main/othervm -Djava.net.preferIPv4Stack=true TestClose
*/

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

public class TestClose {

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

        ServerSocket ss;
        Socket s;
        InetAddress ad1, ad2;
        int port1, port2, serverport;

        InetAddress loopback = InetAddress.getLoopbackAddress();
        ss = new ServerSocket();
        ss.bind(new InetSocketAddress(loopback, 0));
        serverport = ss.getLocalPort();
        s = new Socket(loopback, serverport);
        s.close();
        ss.close();
        ad1 = ss.getInetAddress();
        if (ad1 == null)
            throw new RuntimeException("ServerSocket.getInetAddress() returned null");
        port1 = ss.getLocalPort();
        if (port1 != serverport)
            throw new RuntimeException("ServerSocket.getLocalPort() returned the wrong value");
        ad2 = s.getInetAddress();
        if (ad2 == null)
            throw new RuntimeException("Socket.getInetAddress() returned null");
        port2 = s.getPort();
        if (port2 != serverport)
            throw new RuntimeException("Socket.getPort() returned wrong value");
        ad2 = s.getLocalAddress();
        if (ad2 == null)
            throw new RuntimeException("Socket.getLocalAddress() returned null");
        port2 = s.getLocalPort();
        if (port2 == -1)
            throw new RuntimeException("Socket.getLocalPort returned -1");
    }
}

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