1 /*

     2  * Copyright (c) 2019, 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 jdk.dns.client;

    27 

    28 import java.net.Inet4Address;

    29 import java.net.Inet6Address;

    30 import java.net.InetAddress;

    31 import java.net.ProtocolFamily;

    32 import java.net.StandardProtocolFamily;

    33 

    34 public enum AddressFamily {

    35     IPv4,

    36     IPv6,

    37     ANY;

    38 

    39     public static AddressFamily fromProtocolFamily(ProtocolFamily protocolFamily) {

    40         if (protocolFamily == StandardProtocolFamily.INET) {

    41             return IPv4;

    42         } else if (protocolFamily == StandardProtocolFamily.INET6) {

    43             return IPv6;

    44         } else {

    45             return ANY;

    46         }

    47 

    48     }

    49 

    50     public boolean sameFamily(InetAddress inetAddress) {

    51         switch (this) {

    52             case IPv4:

    53                 return inetAddress instanceof Inet4Address;

    54             case IPv6:

    55                 return inetAddress instanceof Inet6Address;

    56             case ANY:

    57                 return true;

    58             default:

    59                 return false;

    60         }

    61     }

    62 

    63     public static AddressFamily fromInetAddress(InetAddress addr) {

    64         return addr instanceof Inet4Address ? IPv4 : addr instanceof Inet6Address ? IPv6 : ANY;

    65     }

    66 }