/lib/src/org/apache/http/conn/util/InetAddressUtils.java

 1/*
 2 * ====================================================================
 3 * Licensed to the Apache Software Foundation (ASF) under one
 4 * or more contributor license agreements.  See the NOTICE file
 5 * distributed with this work for additional information
 6 * regarding copyright ownership.  The ASF licenses this file
 7 * to you under the Apache License, Version 2.0 (the
 8 * "License"); you may not use this file except in compliance
 9 * with the License.  You may obtain a copy of the License at
10 *
11 *   http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied.  See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation.  For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27
28package org.apache.http.conn.util;
29
30import java.util.regex.Pattern;
31
32import org.apache.http.annotation.Immutable;
33
34/**
35 * A collection of utilities relating to InetAddresses.
36 *
37 * @since 4.0
38 */
39@Immutable
40public class InetAddressUtils {
41
42    private InetAddressUtils() {
43    }
44
45    private static final Pattern IPV4_PATTERN =
46        Pattern.compile(
47                "^(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}$");
48
49    private static final Pattern IPV6_STD_PATTERN =
50        Pattern.compile(
51                "^(?:[0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$");
52
53    private static final Pattern IPV6_HEX_COMPRESSED_PATTERN =
54        Pattern.compile(
55                "^((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)::((?:[0-9A-Fa-f]{1,4}(?::[0-9A-Fa-f]{1,4})*)?)$");
56
57    public static boolean isIPv4Address(final String input) {
58        return IPV4_PATTERN.matcher(input).matches();
59    }
60
61    public static boolean isIPv6StdAddress(final String input) {
62        return IPV6_STD_PATTERN.matcher(input).matches();
63    }
64
65    public static boolean isIPv6HexCompressedAddress(final String input) {
66        return IPV6_HEX_COMPRESSED_PATTERN.matcher(input).matches();
67    }
68
69    public static boolean isIPv6Address(final String input) {
70        return isIPv6StdAddress(input) || isIPv6HexCompressedAddress(input);
71    }
72
73}