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/*
* Copyright (c) 2018, 2019, 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 8215294
* @requires os.family == "linux"
* @library /test/lib
* @build jdk.test.lib.NetworkConfiguration
* PromiscuousIPv6
* @run main/othervm PromiscuousIPv6
* @key randomness
*/
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.Inet6Address;
import java.net.InetSocketAddress;
import java.net.MulticastSocket;
import java.net.NetworkInterface;
import java.net.SocketTimeoutException;
import java.net.StandardSocketOptions;
import java.util.List;
import java.util.Random;
import jdk.test.lib.NetworkConfiguration;
import jtreg.SkippedException;
import static java.lang.System.out;
import static java.nio.charset.StandardCharsets.UTF_8;
import static java.util.stream.Collectors.toList;
/*
* This test was created as a clone of the Promiscuous test and adapted for
* IPv6 node-local and link-local multicast addresses on Linux.
*/
public class PromiscuousIPv6 {
static final Random rand = new Random();
static final int TIMEOUT = 5 * 1000; // 5 secs
static int sendDatagram(NetworkInterface nif, InetAddress group, int port)
throws IOException
{
try (MulticastSocket mc = new MulticastSocket()) {
mc.setOption(StandardSocketOptions.IP_MULTICAST_IF, nif);
int id = rand.nextInt();
byte[] msg = Integer.toString(id).getBytes(UTF_8);
DatagramPacket p = new DatagramPacket(msg, msg.length);
p.setAddress(group);
p.setPort(port);
out.printf("Sending datagram to: %s/%d\n", group, port);
mc.send(p);
return id;
}
}
static void receiveDatagram(DatagramSocket 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(NetworkInterface nif, InetAddress group1, InetAddress group2)
throws IOException
{
// Bind addresses should include the same network interface / scope, so
// as to not reply on the default route when there are multiple interfaces
InetAddress bindAddr1 = Inet6Address.getByAddress(null, group1.getAddress(), nif);
InetAddress bindAddr2 = Inet6Address.getByAddress(null, group2.getAddress(), nif);
try (MulticastSocket mc1 = new MulticastSocket(new InetSocketAddress(bindAddr1, 0));
MulticastSocket mc2 = new MulticastSocket(new InetSocketAddress(bindAddr2, mc1.getLocalPort()))) {
final int port = mc1.getLocalPort();
out.printf("Using port: %d\n", port);
mc1.setSoTimeout(TIMEOUT);
mc2.setSoTimeout(TIMEOUT);
mc1.joinGroup(new InetSocketAddress(group1, 0), nif);
out.printf("mc1 joined the MC group: %s\n", group1);
mc2.joinGroup(new InetSocketAddress(group2, 0), nif);
out.printf("mc2 joined the MC group: %s\n", group2);
out.printf("Sending datagram to: %s/%d\n", group1, port);
int id = sendDatagram(nif, group1, port);
// the packet should be received by mc1 only
receiveDatagram(mc1, true, id);
receiveDatagram(mc2, false, 0);
out.printf("Sending datagram to: %s/%d\n", group2, port);
id = sendDatagram(nif, group2, port);
// the packet should be received by mc2 only
receiveDatagram(mc2, true, id);
receiveDatagram(mc1, false, 0);
mc1.leaveGroup(new InetSocketAddress(group1, 0), nif);
mc2.leaveGroup(new InetSocketAddress(group2, 0), nif);
}
}
public static void main(String args[]) throws IOException {
String os = System.getProperty("os.name");
if (!os.equals("Linux")) {
throw new SkippedException("This test should be run only on Linux");
} else {
String osVersion = System.getProperty("os.version");
String prefix = "3.10.0";
if (osVersion.startsWith(prefix)) {
throw new SkippedException(
String.format("The behavior under test is known NOT to work on '%s' kernels", prefix));
}
}
NetworkConfiguration.printSystemConfiguration(System.out);
List<NetworkInterface> nifs = NetworkConfiguration.probe()
.ip6MulticastInterfaces()
.collect(toList());
if (nifs.size() == 0) {
throw new SkippedException(
"No IPv6 interfaces that support multicast found");
}
InetAddress interfaceLocal1 = InetAddress.getByName("ff11::3.4.5.6");
InetAddress interfaceLocal2 = InetAddress.getByName("ff11::5.6.7.8");
InetAddress linkLocal1 = InetAddress.getByName("ff12::4.5.6.7");
InetAddress linkLocal2 = InetAddress.getByName("ff12::7.8.9.10");
for (NetworkInterface nif : nifs) {
test(nif, interfaceLocal1, interfaceLocal2);
test(nif, linkLocal1, linkLocal2);
}
}
}
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