| /* |
| * Copyright (c) 2002, 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 4512723 6621689 |
| * @summary Test that connect/send/receive with unbound DatagramChannel causes |
| * the channel's socket to be bound to a local address |
| */ |
| |
| import java.net.*; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.DatagramChannel; |
| import java.io.IOException; |
| |
| public class NotBound { |
| |
| static void checkBound(DatagramChannel dc) throws IOException { |
| if (dc.getLocalAddress() == null) |
| throw new RuntimeException("Not bound??"); |
| } |
| |
| // starts a thread to send a datagram to the given channel once the channel |
| // is bound to a local address |
| static void wakeupWhenBound(final DatagramChannel dc) { |
| Runnable wakeupTask = new Runnable() { |
| public void run() { |
| try { |
| // poll for local address |
| InetSocketAddress local; |
| do { |
| Thread.sleep(50); |
| local = (InetSocketAddress)dc.getLocalAddress(); |
| } while (local == null); |
| |
| // send message to channel to wakeup receiver |
| DatagramChannel sender = DatagramChannel.open(); |
| try { |
| ByteBuffer bb = ByteBuffer.wrap("hello".getBytes()); |
| InetAddress lh = InetAddress.getLocalHost(); |
| SocketAddress target = |
| new InetSocketAddress(lh, local.getPort()); |
| sender.send(bb, target); |
| } finally { |
| sender.close(); |
| } |
| |
| } catch (Exception x) { |
| x.printStackTrace(); |
| } |
| }}; |
| new Thread(wakeupTask).start(); |
| } |
| |
| public static void main(String[] args) throws IOException { |
| DatagramChannel dc; |
| |
| // connect |
| dc = DatagramChannel.open(); |
| try { |
| DatagramChannel peer = DatagramChannel.open() |
| .bind(new InetSocketAddress(0)); |
| int peerPort = ((InetSocketAddress)(peer.getLocalAddress())).getPort(); |
| try { |
| dc.connect(new InetSocketAddress(InetAddress.getLocalHost(), peerPort)); |
| checkBound(dc); |
| } finally { |
| peer.close(); |
| } |
| } finally { |
| dc.close(); |
| } |
| |
| // send |
| dc = DatagramChannel.open(); |
| try { |
| ByteBuffer bb = ByteBuffer.wrap("ignore this".getBytes()); |
| SocketAddress target = |
| new InetSocketAddress(InetAddress.getLocalHost(), 5000); |
| dc.send(bb, target); |
| checkBound(dc); |
| } finally { |
| dc.close(); |
| } |
| |
| // receive (blocking) |
| dc = DatagramChannel.open(); |
| try { |
| ByteBuffer bb = ByteBuffer.allocateDirect(128); |
| wakeupWhenBound(dc); |
| SocketAddress sender = dc.receive(bb); |
| if (sender == null) |
| throw new RuntimeException("Sender should not be null"); |
| checkBound(dc); |
| } finally { |
| dc.close(); |
| } |
| |
| // receive (non-blocking) |
| dc = DatagramChannel.open(); |
| try { |
| dc.configureBlocking(false); |
| ByteBuffer bb = ByteBuffer.allocateDirect(128); |
| SocketAddress sender = dc.receive(bb); |
| if (sender != null) |
| throw new RuntimeException("Sender should be null"); |
| checkBound(dc); |
| } finally { |
| dc.close(); |
| } |
| } |
| } |