com.wso2telco.gsma.authenticators.IPRangeChecker.java Source code

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Here is the source code for com.wso2telco.gsma.authenticators.IPRangeChecker.java

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/*******************************************************************************
 * Copyright (c) 2015-2016, WSO2.Telco Inc. (http://www.wso2telco.com) 
 *
 * All Rights Reserved. WSO2.Telco Inc. licences this file to you 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.wso2telco.gsma.authenticators;

import java.net.InetAddress;
import java.net.UnknownHostException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

// TODO: Auto-generated Javadoc

/**
 * The Class IPRangeChecker.
 */
public class IPRangeChecker {

    /**
     * The log.
     */
    private static Log log = LogFactory.getLog(IPRangeChecker.class);

    /**
     * Ip to long.
     *
     * @param ip the ip
     * @return the long
     */
    public static long ipToLong(InetAddress ip) {
        byte[] octets = ip.getAddress();
        long result = 0;
        for (byte octet : octets) {
            result <<= 8;
            result |= octet & 0xff;
        }
        return result;
    }

    /**
     * Checks if is valid range.
     *
     * @param ipStart   the ip start
     * @param ipEnd     the ip end
     * @param ipToCheck the ip to check
     * @return true, if is valid range
     */
    public static boolean isValidRange(String ipStart, String ipEnd, String ipToCheck) {
        try {
            long ipLo = ipToLong(InetAddress.getByName(ipStart));
            long ipHi = ipToLong(InetAddress.getByName(ipEnd));
            long ipToTest = ipToLong(InetAddress.getByName(ipToCheck));
            return (ipToTest >= ipLo && ipToTest <= ipHi);
        } catch (UnknownHostException e) {
            log.error("Error ", e);
            return false;
        }
    }

    /**
     * The main method.
     *
     * @param args the arguments
     */
    public static void main(String[] args) {

        log.info(isValidRange("122.170.122.0", "122.170.122.255", "122.170.122.215"));

    }

}