| /* |
| * Copyright (c) 2000, 2012, 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 utilities |
| * |
| */ |
| |
| import java.io.*; |
| import java.net.*; |
| import java.nio.channels.*; |
| import java.util.Random; |
| |
| |
| public class TestUtil { |
| |
| // Test hosts used by the channels tests - change these when |
| // executing in a different network. |
| public static final String UNRESOLVABLE_HOST = "blah-blah.blah-blah.blah"; |
| |
| private TestUtil() { } |
| |
| // Repeatedly try random ports until we bind to one. You might be tempted |
| // to do this: |
| // |
| // ServerSocketChannel ssc = ServerSocketChannel.open(); |
| // ssc.socket().bind(new InetSocketAddress(0)); |
| // SocketAddress sa = ssc.socket().getLocalSocketAddress(); |
| // |
| // but unfortunately it doesn't work on NT 4.0. |
| // |
| // Returns the bound port. |
| // |
| static int bind(ServerSocketChannel ssc) throws IOException { |
| InetAddress lh = InetAddress.getLocalHost(); |
| Random r = new Random(); |
| for (;;) { |
| int p = r.nextInt((1 << 16) - 1024) + 1024; |
| InetSocketAddress isa = new InetSocketAddress(lh, p); |
| try { |
| ssc.socket().bind(isa); |
| } catch (IOException x) { |
| continue; |
| } |
| return p; |
| } |
| } |
| |
| // A more convenient form of bind(ServerSocketChannel) that returns a full |
| // socket address. |
| // |
| static InetSocketAddress bindToRandomPort(ServerSocketChannel ssc) |
| throws IOException |
| { |
| int p = bind(ssc); |
| return new InetSocketAddress(InetAddress.getLocalHost(), p); |
| } |
| |
| private static String osName = System.getProperty("os.name"); |
| |
| static boolean onSolaris() { |
| return osName.startsWith("SunOS"); |
| } |
| |
| static boolean onWindows() { |
| return osName.startsWith("Windows"); |
| } |
| } |