1/*
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/*
25 * @test
26 * @bug 4476378
27 * @summary Check that SO_REUSEADDR allows a server to restart
28 *          after a crash.
29 * @run main Restart
30 * @run main/othervm -Dsun.net.useExclusiveBind Restart
31 */
32import java.net.*;
33
34public class Restart {
35
36    /*
37     * Test that a server can bind to the same port after
38     * a crash -- ie: while previous connection still in
39     * TIME_WAIT state we should be able to re-bind if
40     * SO_REUSEADDR is enabled.
41     */
42
43    public static void main(String args[]) throws Exception {
44        ServerSocket ss = new ServerSocket(0);
45        Socket s1 = null, s2 = null;
46        try {
47            int port = ss.getLocalPort();
48
49            s1 = new Socket(InetAddress.getLocalHost(), port);
50            s2 = ss.accept();
51
52            // close server socket and the accepted connection
53            ss.close();
54            s2.close();
55
56            ss = new ServerSocket();
57            ss.bind( new InetSocketAddress(port) );
58            ss.close();
59
60            // close the client socket
61            s1.close();
62        } catch (BindException be) {
63            if (System.getProperty("sun.net.useExclusiveBind") != null) {
64                // exclusive bind, expected exception
65            } else {
66                throw be;
67            }
68        } finally {
69            if (ss != null) ss.close();
70            if (s1 != null) s1.close();
71            if (s2 != null) s2.close();
72        }
73    }
74}
75