/*
* Copyright (c) 2002, 2011, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package java.net;
import java.io.IOException;
/*
* Package private implementation of InetAddressImpl for dual
* IPv4/IPv6 stack.
* <p>
* If InetAddress.preferIPv6Address is true then anyLocalAddress(),
* loopbackAddress(), and localHost() will return IPv6 addresses,
* otherwise IPv4 addresses.
*
* @since 1.4
*/
class Inet6AddressImpl implements InetAddressImpl {
public native String getLocalHostName() throws UnknownHostException;
public native InetAddress[]
lookupAllHostAddr(String hostname) throws UnknownHostException;
public native String getHostByAddr(byte[] addr) throws UnknownHostException;
private native boolean isReachable0(byte[] addr, int scope, int timeout, byte[] inf, int ttl, int if_scope) throws IOException;
public boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif, int ttl) throws IOException {
byte[] ifaddr = null;
int scope = -1;
int netif_scope = -1;
if (netif != null) {
/*
* Let's make sure we bind to an address of the proper family.
* Which means same family as addr because at this point it could
* be either an IPv6 address or an IPv4 address (case of a dual
* stack system).
*/
java.util.Enumeration<InetAddress> it = netif.getInetAddresses();
InetAddress inetaddr = null;
while (it.hasMoreElements()) {
inetaddr = it.nextElement();
if (inetaddr.getClass().isInstance(addr)) {
ifaddr = inetaddr.getAddress();
if (inetaddr instanceof Inet6Address) {
netif_scope = ((Inet6Address) inetaddr).getScopeId();
}
break;
}
}
if (ifaddr == null) {
// Interface doesn't support the address family of
// the destination
return false;
}
}
if (addr instanceof Inet6Address)
scope = ((Inet6Address) addr).getScopeId();
return isReachable0(addr.getAddress(), scope, timeout, ifaddr, ttl, netif_scope);
}
public synchronized InetAddress anyLocalAddress() {
if (anyLocalAddress == null) {
if (InetAddress.preferIPv6Address) {
anyLocalAddress = new Inet6Address();
anyLocalAddress.holder().hostName = "::";
} else {
anyLocalAddress = (new Inet4AddressImpl()).anyLocalAddress();
}
}
return anyLocalAddress;
}
public synchronized InetAddress loopbackAddress() {
if (loopbackAddress == null) {
if (InetAddress.preferIPv6Address) {
byte[] loopback =
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
loopbackAddress = new Inet6Address("localhost", loopback);
} else {
loopbackAddress = (new Inet4AddressImpl()).loopbackAddress();
}
}
return loopbackAddress;
}
private InetAddress anyLocalAddress;
private InetAddress loopbackAddress;
}