1 /*
 2  * Copyright (c) 2002, 2021, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package java.net;
27 
28 import java.io.IOException;
29 import java.net.spi.InetAddressResolver.LookupPolicy;
30 
31 /*
32  * Package private interface to "implementation" used by
33  * {@link InetAddress}.
34  * <p>
35  * See {@link java.net.Inet4AddressImp} and
36  * {@link java.net.Inet6AddressImp}.
37  *
38  * @since 1.4
39  */
40 sealed interface InetAddressImpl permits Inet4AddressImpl, Inet6AddressImpl {
41 
42     String getLocalHostName() throws UnknownHostException;
43     InetAddress[]
44         lookupAllHostAddr(String hostname, LookupPolicy lookupPolicy) throws UnknownHostException;
45     String getHostByAddr(byte[] addr) throws UnknownHostException;
46 
47     InetAddress anyLocalAddress();
48     InetAddress loopbackAddress();
49     boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif,
50                         int ttl) throws IOException;
51 }