1/*
2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/conn/util/InetAddressUtils.java $
3 * $Revision: 652020 $
4 * $Date: 2008-04-27 14:23:31 -0700 (Sun, 27 Apr 2008) $
5 *
6 * ====================================================================
7 * Licensed to the Apache Software Foundation (ASF) under one
8 * or more contributor license agreements.  See the NOTICE file
9 * distributed with this work for additional information
10 * regarding copyright ownership.  The ASF licenses this file
11 * to you under the Apache License, Version 2.0 (the
12 * "License"); you may not use this file except in compliance
13 * with the License.  You may obtain a copy of the License at
14 *
15 *   http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing,
18 * software distributed under the License is distributed on an
19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
20 * KIND, either express or implied.  See the License for the
21 * specific language governing permissions and limitations
22 * under the License.
23 * ====================================================================
24 *
25 * This software consists of voluntary contributions made by many
26 * individuals on behalf of the Apache Software Foundation.  For more
27 * information on the Apache Software Foundation, please see
28 * <http://www.apache.org/>.
29 *
30 */
31
32package org.apache.http.conn.util;
33
34import java.util.regex.Pattern;
35
36/**
37 * A collection of utilities relating to InetAddresses.
38 */
39public class InetAddressUtils {
40
41    private InetAddressUtils() {
42    }
43
44    private static final Pattern IPV4_PATTERN =
45        Pattern.compile(
46                "^(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}$");
47
48    private static final Pattern IPV6_STD_PATTERN =
49        Pattern.compile(
50                "^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$");
51
52    private static final Pattern IPV6_HEX_COMPRESSED_PATTERN =
53        Pattern.compile(
54                "^((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)$");
55
56    public static boolean isIPv4Address(final String input) {
57        return IPV4_PATTERN.matcher(input).matches();
58    }
59
60    public static boolean isIPv6StdAddress(final String input) {
61        return IPV6_STD_PATTERN.matcher(input).matches();
62    }
63
64    public static boolean isIPv6HexCompressedAddress(final String input) {
65        return IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
66    }
67
68    public static boolean isIPv6Address(final String input) {
69        return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input);
70    }
71
72}
73