| /* |
| * Copyright (c) 2001, 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 4686717 |
| * @summary Test MulticastSocket.setLoopbackMode |
| * @library /test/lib |
| * @build jdk.test.lib.NetworkConfiguration |
| * jdk.test.lib.Platform |
| * @run main/othervm SetLoopbackMode |
| */ |
| |
| import java.net.*; |
| import java.io.IOException; |
| import java.util.Enumeration; |
| import jdk.test.lib.NetworkConfiguration; |
| |
| public class SetLoopbackMode { |
| |
| static final boolean FAILED = true; |
| static final boolean PASSED = false; |
| |
| static boolean test(MulticastSocket mc, InetAddress grp) throws IOException { |
| |
| boolean disabled = mc.getLoopbackMode(); |
| |
| if (disabled) { |
| System.out.println("Loopback mode is disabled."); |
| } else { |
| System.out.println("Loopback mode is enabled."); |
| } |
| |
| byte b[] = "hello".getBytes(); |
| DatagramPacket p = new DatagramPacket(b, b.length, grp, |
| mc.getLocalPort()); |
| mc.send(p); |
| |
| boolean gotPacket = false; |
| |
| mc.setSoTimeout(1000); |
| try { |
| b = new byte[16]; |
| p = new DatagramPacket(b, b.length); |
| mc.receive(p); |
| gotPacket = true; |
| |
| /* purge any additional copies of the packet */ |
| for (;;) { |
| mc.receive(p); |
| } |
| |
| } catch (SocketTimeoutException x) { |
| } |
| |
| if (gotPacket && disabled) { |
| System.out.println("Packet received (unexpected as loopback is disabled)"); |
| return FAILED; |
| } |
| if (!gotPacket && !disabled) { |
| System.out.println |
| ("Packet not received (packet excepted as loopback is enabled)"); |
| return FAILED; |
| } |
| |
| if (gotPacket && !disabled) { |
| System.out.println("Packet received - correct."); |
| } else { |
| System.out.println("Packet not received - correct."); |
| } |
| |
| return PASSED; |
| } |
| |
| private static boolean canUseIPv6(NetworkConfiguration nc) { |
| return nc.ip6MulticastInterfaces().toArray().length > 0; |
| } |
| |
| public static void main (String args[]) throws Exception { |
| int failures = 0; |
| NetworkConfiguration nc = NetworkConfiguration.probe(); |
| |
| MulticastSocket mc = new MulticastSocket(); |
| InetAddress grp = InetAddress.getByName("224.80.80.80"); |
| |
| |
| /* |
| * If IPv6 is available then use IPv6 multicast group - needed |
| * to workaround Linux IPv6 bug whereby !IPV6_MULTICAST_LOOP |
| * doesn't prevent loopback of IPv4 multicast packets. |
| */ |
| |
| if (canUseIPv6(nc)) { |
| grp = InetAddress.getByName("ff01::1"); |
| } |
| |
| //mc.setNetworkInterface(NetworkInterface.getByInetAddress(lb)); |
| System.out.println("\nTest will use multicast group: " + grp); |
| mc.joinGroup(grp); |
| |
| System.out.println("\n******************\n"); |
| |
| mc.setLoopbackMode(true); |
| if (test(mc, grp) == FAILED) failures++; |
| |
| System.out.println("\n******************\n"); |
| |
| mc.setLoopbackMode(false); |
| if (test(mc, grp) == FAILED) failures++; |
| |
| System.out.println("\n******************\n"); |
| |
| if (failures > 0) { |
| throw new RuntimeException("Test failed"); |
| } |
| } |
| } |