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* Copyright (c) 2000, 2008, 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.
*
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*/
/* 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");
}
}