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