| /* |
| * Copyright (c) 2007, 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 4742177 |
| * @summary Re-test IPv6 (and specifically MulticastSocket) with latest Linux & USAGI code |
| */ |
| import java.util.*; |
| import java.net.*; |
| |
| public class NoLoopbackPackets { |
| private static String osname; |
| |
| static boolean isWindows() { |
| if (osname == null) |
| osname = System.getProperty("os.name"); |
| return osname.contains("Windows"); |
| } |
| |
| private static boolean hasIPv6() throws Exception { |
| List<NetworkInterface> nics = Collections.list( |
| NetworkInterface.getNetworkInterfaces()); |
| for (NetworkInterface nic : nics) { |
| if (!nic.isLoopback()) { |
| List<InetAddress> addrs = Collections.list(nic.getInetAddresses()); |
| for (InetAddress addr : addrs) { |
| if (addr instanceof Inet6Address) { |
| return true; |
| } |
| } |
| } |
| } |
| |
| return false; |
| } |
| |
| public static void main(String[] args) throws Exception { |
| if (isWindows()) { |
| System.out.println("The test only run on non-Windows OS. Bye."); |
| return; |
| } |
| |
| if (!hasIPv6()) { |
| System.out.println("No IPv6 available. Bye."); |
| return; |
| } |
| |
| MulticastSocket msock = null; |
| List<SocketAddress> failedGroups = new ArrayList<SocketAddress>(); |
| try { |
| msock = new MulticastSocket(); |
| int port = msock.getLocalPort(); |
| |
| // we will send packets to three multicast groups :- |
| // 224.1.1.1, ::ffff:224.1.1.2, and ff02::1:1 |
| // |
| List<SocketAddress> groups = new ArrayList<SocketAddress>(); |
| groups.add(new InetSocketAddress(InetAddress.getByName("224.1.1.1"), port)); |
| groups.add(new InetSocketAddress(InetAddress.getByName("::ffff:224.1.1.2"), port)); |
| groups.add(new InetSocketAddress(InetAddress.getByName("ff02::1:1"), port)); |
| |
| Thread sender = new Thread(new Sender(groups)); |
| sender.setDaemon(true); // we want sender to stop when main thread exits |
| sender.start(); |
| |
| // Now try to receive multicast packets. we should not see any of them |
| // since we disable loopback mode. |
| // |
| msock.setSoTimeout(5000); // 5 seconds |
| |
| byte[] buf = new byte[1024]; |
| DatagramPacket packet = new DatagramPacket(buf, 0, buf.length); |
| for (SocketAddress group : groups) { |
| msock.joinGroup(group, null); |
| |
| try { |
| msock.receive(packet); |
| |
| // it is an error if we receive something |
| failedGroups.add(group); |
| } catch (SocketTimeoutException e) { |
| // we expect this |
| } |
| |
| msock.leaveGroup(group, null); |
| } |
| } finally { |
| if (msock != null) try { msock.close(); } catch (Exception e) {} |
| } |
| |
| if (failedGroups.size() > 0) { |
| System.out.println("We should not receive anything from following groups, but we did:"); |
| for (SocketAddress group : failedGroups) |
| System.out.println(group); |
| throw new RuntimeException("test failed."); |
| } |
| } |
| |
| static class Sender implements Runnable { |
| private List<SocketAddress> sendToGroups; |
| |
| public Sender(List<SocketAddress> groups) { |
| sendToGroups = groups; |
| } |
| |
| public void run() { |
| byte[] buf = "hello world".getBytes(); |
| List<DatagramPacket> packets = new ArrayList<DatagramPacket>(); |
| |
| try { |
| for (SocketAddress group : sendToGroups) { |
| DatagramPacket packet = new DatagramPacket(buf, buf.length, group); |
| packets.add(packet); |
| } |
| |
| MulticastSocket msock = new MulticastSocket(); |
| msock.setLoopbackMode(true); // disable loopback mode |
| for (;;) { |
| for (DatagramPacket packet : packets) { |
| msock.send(packet); |
| } |
| |
| Thread.sleep(1000); // 1 second |
| } |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |