J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * @test |
| 26 | * @bug 4742177 |
| 27 | * @summary Re-test IPv6 (and specifically MulticastSocket) with latest Linux & USAGI code |
| 28 | */ |
| 29 | import java.util.*; |
| 30 | import java.net.*; |
| 31 | |
| 32 | |
| 33 | public class NoLoopbackPackets { |
| 34 | private static int PORT = 9001; |
| 35 | private static String osname; |
| 36 | |
| 37 | static boolean isWindows() { |
| 38 | if (osname == null) |
| 39 | osname = System.getProperty("os.name"); |
| 40 | return osname.contains("Windows"); |
| 41 | } |
| 42 | |
| 43 | private static boolean hasIPv6() throws Exception { |
| 44 | List<NetworkInterface> nics = Collections.list( |
| 45 | NetworkInterface.getNetworkInterfaces()); |
| 46 | for (NetworkInterface nic : nics) { |
| 47 | if (!nic.isLoopback()) { |
| 48 | List<InetAddress> addrs = Collections.list(nic.getInetAddresses()); |
| 49 | for (InetAddress addr : addrs) { |
| 50 | if (addr instanceof Inet6Address) { |
| 51 | return true; |
| 52 | } |
| 53 | } |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | return false; |
| 58 | } |
| 59 | |
| 60 | public static void main(String[] args) throws Exception { |
| 61 | if (isWindows()) { |
| 62 | System.out.println("The test only run on non-Windows OS. Bye."); |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | if (!hasIPv6()) { |
| 67 | System.out.println("No IPv6 available. Bye."); |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | // we will send packets to three multicast groups :- |
| 72 | // 224.1.1.1, ::ffff:224.1.1.2, and ff02::1:1 |
| 73 | // |
| 74 | List<SocketAddress> groups = new ArrayList<SocketAddress>(); |
| 75 | groups.add(new InetSocketAddress(InetAddress.getByName("224.1.1.1"), PORT)); |
| 76 | groups.add(new InetSocketAddress(InetAddress.getByName("::ffff:224.1.1.2"), PORT)); |
| 77 | groups.add(new InetSocketAddress(InetAddress.getByName("ff02::1:1"), PORT)); |
| 78 | |
| 79 | Thread sender = new Thread(new Sender(groups)); |
| 80 | sender.setDaemon(true); // we want sender to stop when main thread exits |
| 81 | sender.start(); |
| 82 | |
| 83 | // Now try to receive multicast packets. we should not see any of them |
| 84 | // since we disable loopback mode. |
| 85 | // |
| 86 | MulticastSocket msock = new MulticastSocket(PORT); |
| 87 | msock.setSoTimeout(5000); // 5 seconds |
| 88 | |
| 89 | byte[] buf = new byte[1024]; |
| 90 | DatagramPacket packet = new DatagramPacket(buf, 0, buf.length); |
| 91 | List<SocketAddress> failedGroups = new ArrayList<SocketAddress>(); |
| 92 | for (SocketAddress group : groups) { |
| 93 | msock.joinGroup(group, null); |
| 94 | |
| 95 | try { |
| 96 | msock.receive(packet); |
| 97 | |
| 98 | // it is an error if we receive something |
| 99 | failedGroups.add(group); |
| 100 | } catch (SocketTimeoutException e) { |
| 101 | // we expect this |
| 102 | } |
| 103 | |
| 104 | msock.leaveGroup(group, null); |
| 105 | } |
| 106 | |
| 107 | if (failedGroups.size() > 0) { |
| 108 | System.out.println("We should not receive anything from following groups, but we did:"); |
| 109 | for (SocketAddress group : failedGroups) |
| 110 | System.out.println(group); |
| 111 | throw new RuntimeException("test failed."); |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | class Sender implements Runnable { |
| 117 | private List<SocketAddress> sendToGroups; |
| 118 | |
| 119 | public Sender(List<SocketAddress> groups) { |
| 120 | sendToGroups = groups; |
| 121 | } |
| 122 | |
| 123 | public void run() { |
| 124 | byte[] buf = "hello world".getBytes(); |
| 125 | List<DatagramPacket> packets = new ArrayList<DatagramPacket>(); |
| 126 | |
| 127 | try { |
| 128 | for (SocketAddress group : sendToGroups) { |
| 129 | DatagramPacket packet = new DatagramPacket(buf, buf.length, group); |
| 130 | packets.add(packet); |
| 131 | } |
| 132 | |
| 133 | MulticastSocket msock = new MulticastSocket(); |
| 134 | msock.setLoopbackMode(true); // disable loopback mode |
| 135 | for (;;) { |
| 136 | for (DatagramPacket packet : packets) { |
| 137 | msock.send(packet); |
| 138 | } |
| 139 | |
| 140 | Thread.currentThread().sleep(1000); // 1 second |
| 141 | } |
| 142 | } catch (Exception e) { |
| 143 | throw new RuntimeException(e); |
| 144 | } |
| 145 | } |
| 146 | } |