1/*
2 * Copyright (c) 2002, 2005, 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
26package java.net;
27import java.io.IOException;
28/*
29 * Package private interface to "implementation" used by
30 * {@link InetAddress}.
31 * <p>
32 * See {@link java.net.Inet4AddressImp} and
33 * {@link java.net.Inet6AddressImp}.
34 *
35 * @since 1.4
36 */
37interface InetAddressImpl {
38    /**
39     * Lookup all addresses for {@code hostname} on the given {@code netId}.
40     */
41    InetAddress[] lookupAllHostAddr(String hostname, int netId) throws UnknownHostException;
42
43    /**
44     * Reverse-lookup the host name for a given {@code addr}.
45     */
46    String getHostByAddr(byte[] addr) throws UnknownHostException;
47
48    /**
49     * Clear address caches (if any).
50     */
51    public void clearAddressCache();
52
53    /**
54     * Return the "any" local address.
55     */
56    InetAddress anyLocalAddress();
57
58    /**
59     * Return a list of loop back adresses for this implementation.
60     */
61    InetAddress[] loopbackAddresses();
62
63    /**
64     * Whether {@code addr} is reachable over {@code netif}.
65     */
66    boolean isReachable(InetAddress addr, int timeout, NetworkInterface netif,
67                        int ttl) throws IOException;
68}
69