ru.asmsoft.p2p.incoming.LocalAddressesFilteringService.java Source code

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Here is the source code for ru.asmsoft.p2p.incoming.LocalAddressesFilteringService.java

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/**
 * The MIT License (MIT)
 * <p>
 * Copyright (c) 22.03.16 <Alex S. Marinenko> alex.marinenko@gmail.com
 * <p>
 * <p>
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package ru.asmsoft.p2p.incoming;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.messaging.Message;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

@Service("localAddressesFilteringService")
public class LocalAddressesFilteringService implements IPacketsFilteringService {

    Logger logger = LoggerFactory.getLogger(this.getClass());

    List<String> localIpAddresses = new ArrayList<String>();

    @PostConstruct
    public void init() {
        try {
            logger.info("Full list of Network Interfaces:");
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en
                    .hasMoreElements();) {
                NetworkInterface intf = en.nextElement();
                logger.info("    " + intf.getName() + " " + intf.getDisplayName());
                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) {
                    String ip = enumIpAddr.nextElement().toString().replace("/", "");
                    logger.info("        " + ip);
                    localIpAddresses.add(ip);
                }
            }
        } catch (SocketException e) {
            logger.info(" (error retrieving network interface list)");
        }
    }

    @Override
    public boolean isPacketAllowed(Message message) {
        return !localIpAddresses.contains((String) message.getHeaders().get("ip_address"));
    }

}