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/*
* 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 4476378
* @library /test/lib
* @summary Check that SO_REUSEADDR allows a server to restart
* after a crash.
* @run main Restart
* @run main/othervm -Dsun.net.useExclusiveBind Restart
* @run main/othervm -Dsun.net.useExclusiveBind=true Restart
* @run main/othervm -Djava.net.preferIPv4Stack=true Restart
* @run main/othervm -Dsun.net.useExclusiveBind
* -Djava.net.preferIPv4Stack=true Restart
* @run main/othervm -Dsun.net.useExclusiveBind=true
* -Djava.net.preferIPv4Stack=true Restart
*/
import java.net.*;
import jdk.test.lib.net.IPSupport;
public class Restart {
/*
* Test that a server can bind to the same port after
* a crash -- ie: while previous connection still in
* TIME_WAIT state we should be able to re-bind if
* SO_REUSEADDR is enabled.
*/
public static void main(String args[]) throws Exception {
IPSupport.throwSkippedExceptionIfNonOperational();
InetAddress localHost = InetAddress.getLocalHost();
ServerSocket ss = new ServerSocket(0, 0, localHost);
Socket s1 = null, s2 = null;
try {
int port = ss.getLocalPort();
s1 = new Socket(localHost, port);
s2 = ss.accept();
// close server socket and the accepted connection
ss.close();
s2.close();
ss = new ServerSocket();
ss.bind( new InetSocketAddress(localHost, port) );
ss.close();
// close the client socket
s1.close();
} catch (BindException be) {
if (System.getProperty("sun.net.useExclusiveBind") != null) {
// exclusive bind, expected exception
} else {
throw be;
}
} finally {
if (ss != null) ss.close();
if (s1 != null) s1.close();
if (s2 != null) s2.close();
}
}
}
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