| /* |
| * Copyright (c) 2013, 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 8014499 |
| * @summary Test for interference when two sockets are bound to the same |
| * port but joined to different multicast groups |
| * @run main Promiscuous |
| * @run main/othervm -Djava.net.preferIPv4Stack=true Promiscuous |
| */ |
| |
| import java.io.IOException; |
| import static java.lang.System.out; |
| import java.net.*; |
| |
| public class Promiscuous { |
| |
| static final int TIMEOUT = 5 * 1000; // 5 secs |
| static int id = 1000; |
| |
| static void receive(MulticastSocket mc, boolean datagramExpected, int id) |
| throws IOException |
| { |
| byte[] ba = new byte[100]; |
| DatagramPacket p = new DatagramPacket(ba, ba.length); |
| try { |
| mc.receive(p); |
| int recvId = Integer.parseInt( |
| new String(p.getData(), 0, p.getLength(), "UTF-8")); |
| if (datagramExpected) { |
| if (recvId != id) |
| throw new RuntimeException("Unexpected id, got " + recvId |
| + ", expected: " + id); |
| out.printf("Received message as expected, %s\n", p.getAddress()); |
| } else { |
| throw new RuntimeException("Unexpected message received, " |
| + p.getAddress()); |
| } |
| } catch (SocketTimeoutException e) { |
| if (datagramExpected) |
| throw new RuntimeException("Expected message not received, " |
| + e.getMessage()); |
| else |
| out.printf("Message not received, as expected\n"); |
| } |
| } |
| |
| static void test(InetAddress group1, InetAddress group2) |
| throws IOException |
| { |
| try (MulticastSocket mc1 = new MulticastSocket(); |
| MulticastSocket mc2 = new MulticastSocket(mc1.getLocalPort()); |
| DatagramSocket ds = new DatagramSocket()) { |
| final int port = mc1.getLocalPort(); |
| out.printf("Using port: %d\n", port); |
| |
| mc1.setSoTimeout(TIMEOUT); |
| mc2.setSoTimeout(TIMEOUT); |
| int nextId = id; |
| byte[] msg = Integer.toString(nextId).getBytes("UTF-8"); |
| DatagramPacket p = new DatagramPacket(msg, msg.length); |
| p.setAddress(group1); |
| p.setPort(port); |
| |
| mc1.joinGroup(group1); |
| out.printf("mc1 joined the MC group: %s\n", group1); |
| mc2.joinGroup(group2); |
| out.printf("mc2 joined the MC group: %s\n", group2); |
| |
| out.printf("Sending datagram to: %s/%d\n", group1, port); |
| ds.send(p); |
| |
| // the packet should be received by mc1 only |
| receive(mc1, true, nextId); |
| receive(mc2, false, 0); |
| |
| nextId = ++id; |
| msg = Integer.toString(nextId).getBytes("UTF-8"); |
| p = new DatagramPacket(msg, msg.length); |
| p.setAddress(group2); |
| p.setPort(port); |
| |
| out.printf("Sending datagram to: %s/%d\n", group2, port); |
| ds.send(p); |
| |
| // the packet should be received by mc2 only |
| receive(mc2, true, nextId); |
| receive(mc1, false, 0); |
| |
| mc1.leaveGroup(group1); |
| mc2.leaveGroup(group2); |
| } |
| } |
| |
| public static void main(String args[]) throws IOException { |
| String os = System.getProperty("os.name"); |
| |
| // Requires IP_MULTICAST_ALL on Linux (new since 2.6.31) so skip |
| // on older kernels. Note that we skip on <= version 3 to keep the |
| // parsing simple |
| if (os.equals("Linux")) { |
| String osversion = System.getProperty("os.version"); |
| String[] vers = osversion.split("\\.", 0); |
| int major = Integer.parseInt(vers[0]); |
| if (major < 3) { |
| System.out.format("Kernel version is %s, test skipped%n", osversion); |
| return; |
| } |
| } |
| |
| // multicast groups used for the test |
| InetAddress ip4Group1 = InetAddress.getByName("224.7.8.9"); |
| InetAddress ip4Group2 = InetAddress.getByName("225.4.5.6"); |
| |
| test(ip4Group1, ip4Group2); |
| } |
| } |