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/*
* Copyright (c) 2016, 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 8016521
* @summary InetAddress should not always re-order addresses returned from name
* service
* @run main/othervm -Djava.net.preferIPv6Addresses=false PreferIPv6AddressesTest
* @run main/othervm -Djava.net.preferIPv6Addresses=true PreferIPv6AddressesTest
* @run main/othervm -Djava.net.preferIPv6Addresses=system PreferIPv6AddressesTest
* @run main/othervm PreferIPv6AddressesTest
*/
import java.io.IOException;
import java.net.*;
import java.nio.channels.DatagramChannel;
import java.util.Arrays;
import java.util.stream.IntStream;
import static java.lang.System.out;
public class PreferIPv6AddressesTest {
// A name, that if resolves, returns both IPv4 and IPv6 addresses.
static final String HOST_NAME = "www.google.com";
static final InetAddress LOOPBACK = InetAddress.getLoopbackAddress();
static final String preferIPV6Address =
System.getProperty("java.net.preferIPv6Addresses", "false");
public static void main(String args[]) throws IOException {
InetAddress addrs[];
try {
addrs = InetAddress.getAllByName(HOST_NAME);
} catch (UnknownHostException e) {
out.println("Unknown host " + HOST_NAME + ", cannot run test.");
return;
}
int firstIPv4Address = IntStream.range(0, addrs.length)
.filter(x -> addrs[x] instanceof Inet4Address)
.findFirst().orElse(-1);
int firstIPv6Address = IntStream.range(0, addrs.length)
.filter(x -> addrs[x] instanceof Inet6Address)
.findFirst().orElse(-1);
out.println("IPv6 supported: " + IPv6Supported());
out.println("Addresses: " + Arrays.asList(addrs));
if (preferIPV6Address.equalsIgnoreCase("true") && firstIPv6Address != -1) {
int off = firstIPv4Address != -1 ? firstIPv4Address : addrs.length;
assertAllv6Addresses(addrs, 0, off);
assertAllv4Addresses(addrs, off, addrs.length);
assertLoopbackAddress(Inet6Address.class);
assertAnyLocalAddress(Inet6Address.class);
} else if (preferIPV6Address.equalsIgnoreCase("false") && firstIPv4Address != -1) {
int off = firstIPv6Address != -1 ? firstIPv6Address : addrs.length;
assertAllv4Addresses(addrs, 0, off);
assertAllv6Addresses(addrs, off, addrs.length);
assertLoopbackAddress(Inet4Address.class);
assertAnyLocalAddress(Inet4Address.class);
} else if (preferIPV6Address.equalsIgnoreCase("system") && IPv6Supported()) {
assertLoopbackAddress(Inet6Address.class);
assertAnyLocalAddress(Inet6Address.class);
} else if (preferIPV6Address.equalsIgnoreCase("system") && !IPv6Supported()) {
assertLoopbackAddress(Inet4Address.class);
assertAnyLocalAddress(Inet4Address.class);
}
}
static void assertAllv4Addresses(InetAddress[] addrs, int off, int len) {
IntStream.range(off, len)
.mapToObj(x -> addrs[x])
.forEach(x -> {
if (!(x instanceof Inet4Address))
throw new RuntimeException("Expected IPv4, got " + x);
});
}
static void assertAllv6Addresses(InetAddress[] addrs, int off, int len) {
IntStream.range(off, len)
.mapToObj(x -> addrs[x])
.forEach(x -> {
if (!(x instanceof Inet6Address))
throw new RuntimeException("Expected IPv6, got " + x);
});
}
static void assertLoopbackAddress(Class<?> expectedType) {
if (!LOOPBACK.getClass().isAssignableFrom(expectedType))
throw new RuntimeException("Expected " + expectedType
+ ", got " + LOOPBACK.getClass());
}
static void assertAnyLocalAddress(Class<?> expectedType) {
InetAddress anyAddr = (new InetSocketAddress(0)).getAddress();
if (!anyAddr.getClass().isAssignableFrom(expectedType))
throw new RuntimeException("Expected " + expectedType
+ ", got " + anyAddr.getClass());
}
static boolean IPv6Supported() throws IOException {
try {
DatagramChannel.open(StandardProtocolFamily.INET6);
return true;
} catch (UnsupportedOperationException x) {
return false;
}
}
}
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