content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.nacos.config.server.utils;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  /**
   * ip util
   *
   * @author Nacos
   */
  @SuppressWarnings("PMD.ClassNamingShouldBeCamelRule")
  public class IPUtil {
  
      public static boolean isIPV4(String addr) {
          if (null == addr) {
              return false;
          }
          String rexp = "^((25[0-5]|2[0-4]\\d|[01]?\\d\\d?)\\.){3}(25[0-5]|2[0-4]\\d|[01]?\\d\\d?)$";
  
          Pattern pat = Pattern.compile(rexp);
  
          Matcher mat = pat.matcher(addr);
  
          boolean ipAddress = mat.find();
          return ipAddress;
      }
  
      public static boolean isIPV6(String addr) {
          if (null == addr) {
              return false;
          }
          String rexp = "^([\\da-fA-F]{1,4}:){7}[\\da-fA-F]{1,4}$";
  
          Pattern pat = Pattern.compile(rexp);
  
          Matcher mat = pat.matcher(addr);
  
          boolean ipAddress = mat.find();
          return ipAddress;
      }
  }
  