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124 lines
3.8 KiB
124 lines
3.8 KiB
/* |
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* Copyright (c) 2001, 2002, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* @test |
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* @bug 4686717 |
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* @summary Test MulticastSocket.setLoopbackMode |
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*/ |
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import java.net.*; |
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import java.io.IOException; |
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public class SetLoopbackMode { |
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static final boolean FAILED = true; |
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static final boolean PASSED = false; |
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static boolean test(MulticastSocket mc, InetAddress grp) throws IOException { |
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boolean disabled = mc.getLoopbackMode(); |
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if (disabled) { |
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System.out.println("Loopback mode is disabled."); |
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} else { |
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System.out.println("Loopback mode is enabled."); |
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} |
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byte b[] = "hello".getBytes(); |
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DatagramPacket p = new DatagramPacket(b, b.length, grp, |
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mc.getLocalPort()); |
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mc.send(p); |
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boolean gotPacket = false; |
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mc.setSoTimeout(1000); |
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try { |
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b = new byte[16]; |
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p = new DatagramPacket(b, b.length); |
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mc.receive(p); |
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gotPacket = true; |
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/* purge any additional copies of the packet */ |
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for (;;) { |
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mc.receive(p); |
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} |
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} catch (SocketTimeoutException x) { |
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} |
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if (gotPacket && disabled) { |
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System.out.println("Packet received (unexpected as loopback is disabled)"); |
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return FAILED; |
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} |
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if (!gotPacket && !disabled) { |
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System.out.println |
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("Packet not received (packet excepted as loopback is enabled)"); |
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return FAILED; |
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} |
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if (gotPacket && !disabled) { |
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System.out.println("Packet received - correct."); |
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} else { |
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System.out.println("Packet not received - correct."); |
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} |
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return PASSED; |
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} |
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public static void main (String args[]) throws Exception { |
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int failures = 0; |
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MulticastSocket mc = new MulticastSocket(); |
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InetAddress grp = InetAddress.getByName("224.80.80.80"); |
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/* |
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* If IPv6 is available then use IPv6 multicast group - needed |
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* to workaround Linux IPv6 bug whereby !IPV6_MULTICAST_LOOP |
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* doesn't prevent loopback of IPv4 multicast packets. |
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*/ |
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InetAddress lb = InetAddress.getByName("::1"); |
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if (NetworkInterface.getByInetAddress(lb) != null) { |
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grp = InetAddress.getByName("ff01::1"); |
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} |
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System.out.println("\nTest will use multicast group: " + grp); |
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mc.joinGroup(grp); |
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System.out.println("\n******************\n"); |
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mc.setLoopbackMode(true); |
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if (test(mc, grp) == FAILED) failures++; |
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System.out.println("\n******************\n"); |
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mc.setLoopbackMode(false); |
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if (test(mc, grp) == FAILED) failures++; |
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System.out.println("\n******************\n"); |
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if (failures > 0) { |
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throw new RuntimeException("Test failed"); |
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} |
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} |
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}
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