/*
* Copyright (c) 2007, 2010, 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
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* questions.
*/
/*
* @test
* @bug 4742177
* @summary Re-test IPv6 (and specifically MulticastSocket) with latest Linux & USAGI code
*/
import java.net.*;
import java.util.*;
public class SetOutgoingIf {
private static int PORT = 9001;
private static String osname;
static boolean isWindows() {
if (osname == null)
osname = System.getProperty("os.name");
return osname.contains("Windows");
}
private static boolean hasIPv6() throws Exception {
List<NetworkInterface> nics = Collections.list(
NetworkInterface.getNetworkInterfaces());
for (NetworkInterface nic : nics) {
List<InetAddress> addrs = Collections.list(nic.getInetAddresses());
for (InetAddress addr : addrs) {
if (addr instanceof Inet6Address)
return true;
}
}
return false;
}
public static void main(String[] args) throws Exception {
if (isWindows()) {
System.out.println("The test only run on non-Windows OS. Bye.");
return;
}
if (!hasIPv6()) {
System.out.println("No IPv6 available. Bye.");
return;
}
// We need 2 or more network interfaces to run the test
//
List<NetIf> netIfs = new ArrayList<NetIf>();
int index = 1;
for (NetworkInterface nic : Collections.list(NetworkInterface.getNetworkInterfaces())) {
// we should use only network interfaces with multicast support which are in "up" state
if (!nic.isLoopback() && nic.supportsMulticast() && nic.isUp()) {
NetIf netIf = NetIf.create(nic);
// now determine what (if any) type of addresses are assigned to this interface
for (InetAddress addr : Collections.list(nic.getInetAddresses())) {
if (addr.isAnyLocalAddress())
continue;
System.out.println(" addr " + addr);
if (addr instanceof Inet4Address) {
netIf.ipv4Address(true);
} else if (addr instanceof Inet6Address) {
netIf.ipv6Address(true);
}
}
if (netIf.ipv4Address() || netIf.ipv6Address()) {
netIf.index(index++);
netIfs.add(netIf);
debug("Using: " + nic);
}
}
}
if (netIfs.size() <= 1) {
System.out.println("Need 2 or more network interfaces to run. Bye.");
return;
}
// We will send packets to one ipv4, and one ipv6
// multicast group using each network interface :-
// 224.1.1.1 --|
// ff02::1:1 --|--> using network interface #1
// 224.1.2.1 --|
// ff02::1:2 --|--> using network interface #2
// and so on.
//
for (NetIf netIf : netIfs) {
int NetIfIndex = netIf.index();
List<InetAddress> groups = new ArrayList<InetAddress>();
if (netIf.ipv4Address()) {
InetAddress groupv4 = InetAddress.getByName("224.1." + NetIfIndex + ".1");
groups.add(groupv4);
}
if (netIf.ipv6Address()) {
InetAddress groupv6 = InetAddress.getByName("ff02::1:" + NetIfIndex);
groups.add(groupv6);
}
debug("Adding " + groups + " groups for " + netIf.nic().getName());
netIf.groups(groups);
// use a separated thread to send to those 2 groups
Thread sender = new Thread(new Sender(netIf,
groups,
PORT));
sender.setDaemon(true); // we want sender to stop when main thread exits
sender.start();
}
// try to receive on each group, then check if the packet comes
// from the expected network interface
//
byte[] buf = new byte[1024];
for (NetIf netIf : netIfs) {
NetworkInterface nic = netIf.nic();
for (InetAddress group : netIf.groups()) {
MulticastSocket mcastsock = new MulticastSocket(PORT);
mcastsock.setSoTimeout(5000); // 5 second
DatagramPacket packet = new DatagramPacket(buf, 0, buf.length);
// the interface supports the IP multicast group
debug("Joining " + group + " on " + nic.getName());
mcastsock.joinGroup(new InetSocketAddress(group, PORT), nic);
try {
mcastsock.receive(packet);
debug("received packet on " + packet.getAddress());
} catch (Exception e) {
// test failed if any exception
throw new RuntimeException(e);
}
// now check which network interface this packet comes from
NetworkInterface from = NetworkInterface.getByInetAddress(packet.getAddress());
NetworkInterface shouldbe = nic;
if (!from.equals(shouldbe)) {
System.out.println("Packets on group "
+ group + " should come from "
+ shouldbe.getName() + ", but came from "
+ from.getName());
//throw new RuntimeException("Test failed.");
}
mcastsock.leaveGroup(new InetSocketAddress(group, PORT), nic);
}
}
}
private static boolean debug = true;
static void debug(String message) {
if (debug)
System.out.println(message);
}
}
class Sender implements Runnable {
private NetIf netIf;
private List<InetAddress> groups;
private int port;
public Sender(NetIf netIf,
List<InetAddress> groups,
int port) {
this.netIf = netIf;
this.groups = groups;
this.port = port;
}
public void run() {
try {
MulticastSocket mcastsock = new MulticastSocket();
mcastsock.setNetworkInterface(netIf.nic());
List<DatagramPacket> packets = new LinkedList<DatagramPacket>();
byte[] buf = "hello world".getBytes();
for (InetAddress group : groups) {
packets.add(new DatagramPacket(buf, buf.length, new InetSocketAddress(group, port)));
}
for (;;) {
for (DatagramPacket packet : packets)
mcastsock.send(packet);
Thread.sleep(1000); // sleep 1 second
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
@SuppressWarnings("unchecked")
class NetIf {
private boolean ipv4Address; //false
private boolean ipv6Address; //false
private int index;
List<InetAddress> groups = Collections.EMPTY_LIST;
private final NetworkInterface nic;
private NetIf(NetworkInterface nic) {
this.nic = nic;
}
static NetIf create(NetworkInterface nic) {
return new NetIf(nic);
}
NetworkInterface nic() {
return nic;
}
boolean ipv4Address() {
return ipv4Address;
}
void ipv4Address(boolean ipv4Address) {
this.ipv4Address = ipv4Address;
}
boolean ipv6Address() {
return ipv6Address;
}
void ipv6Address(boolean ipv6Address) {
this.ipv6Address = ipv6Address;
}
int index() {
return index;
}
void index(int index) {
this.index = index;
}
List<InetAddress> groups() {
return groups;
}
void groups(List<InetAddress> groups) {
this.groups = groups;
}
}