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      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 
     26 package java.net;
     27 import 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  */
     37 interface 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