View Javadoc
1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  package org.apache.commons.net.examples.cidr;
18  
19  import java.nio.charset.Charset;
20  import java.util.Arrays;
21  import java.util.Scanner;
22  
23  import org.apache.commons.net.util.SubnetUtils;
24  import org.apache.commons.net.util.SubnetUtils.SubnetInfo;
25  
26  /**
27   * Example class that shows how to use the {@link SubnetUtils} class.
28   */
29  public class SubnetUtilsExample {
30  
31      public static void main(final String[] args) {
32          final String subnet = "192.168.0.3/31";
33          final SubnetUtils utils = new SubnetUtils(subnet);
34          final SubnetInfo info = utils.getInfo();
35  
36          System.out.printf("Subnet Information for %s:%n", subnet);
37          System.out.println("--------------------------------------");
38          System.out.printf("IP Address:\t\t\t%s\t[%s]%n", info.getAddress(), Integer.toBinaryString(info.asInteger(info.getAddress())));
39          System.out.printf("Netmask:\t\t\t%s\t[%s]%n", info.getNetmask(), Integer.toBinaryString(info.asInteger(info.getNetmask())));
40          System.out.printf("CIDR Representation:\t\t%s%n%n", info.getCidrSignature());
41  
42          System.out.printf("Supplied IP Address:\t\t%s%n%n", info.getAddress());
43  
44          System.out.printf("Network Address:\t\t%s\t[%s]%n", info.getNetworkAddress(), Integer.toBinaryString(info.asInteger(info.getNetworkAddress())));
45          System.out.printf("Broadcast Address:\t\t%s\t[%s]%n", info.getBroadcastAddress(), Integer.toBinaryString(info.asInteger(info.getBroadcastAddress())));
46          System.out.printf("Low Address:\t\t\t%s\t[%s]%n", info.getLowAddress(), Integer.toBinaryString(info.asInteger(info.getLowAddress())));
47          System.out.printf("High Address:\t\t\t%s\t[%s]%n", info.getHighAddress(), Integer.toBinaryString(info.asInteger(info.getHighAddress())));
48  
49          System.out.printf("Total usable addresses: \t%d%n", Long.valueOf(info.getAddressCountLong()));
50          System.out.printf("Address List: %s%n%n", Arrays.toString(info.getAllAddresses()));
51  
52          final String prompt = "Enter an IP address (e.g. 192.168.0.10):";
53          System.out.println(prompt);
54          try (final Scanner scanner = new Scanner(System.in, Charset.defaultCharset().name())) {
55              while (scanner.hasNextLine()) {
56                  final String address = scanner.nextLine();
57                  System.out.println("The IP address [" + address + "] is " + (info.isInRange(address) ? "" : "not ") + "within the subnet [" + subnet + "]");
58                  System.out.println(prompt);
59              }
60          }
61      }
62  
63  }