content: /**
   * This file is part of Aion-Lightning <aion-lightning.org>.
   *
   *  Aion-Lightning is free software: you can redistribute it and/or modify
   *  it under the terms of the GNU General Public License as published by
   *  the Free Software Foundation, either version 3 of the License, or
   *  (at your option) any later version.
   *
   *  Aion-Lightning is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   *  GNU General Public License for more details. *
   *  You should have received a copy of the GNU General Public License
   *  along with Aion-Lightning.
   *  If not, see <http://www.gnu.org/licenses/>.
   */
  package com.aionemu.gameserver.configs.network;
  
  import java.io.File;
  import java.net.InetAddress;
  import java.net.UnknownHostException;
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.xml.parsers.SAXParser;
  import javax.xml.parsers.SAXParserFactory;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  import org.xml.sax.helpers.DefaultHandler;
  
  import com.aionemu.commons.network.IPRange;
  
  /**
   * @author Taran, SoulKeeper Class that is designed to read IPConfig.xml
   */
  public class IPConfig {
  
  	/**
  	 * Logger
  	 */
  	private static final Logger log = LoggerFactory.getLogger(IPConfig.class);
  	/**
  	 * Location of config file
  	 */
  	private static final String CONFIG_FILE = "./config/network/ipconfig.xml";
  	/**
  	 * List of all ip ranges
  	 */
  	private static final List<IPRange> ranges = new ArrayList<IPRange>();
  	/**
  	 * Default address
  	 */
  	private static byte[] defaultAddress;
  
  	/**
  	 * Method that loads IPConfig
  	 */
  	public static void load() {
  		try {
  			SAXParser parser = SAXParserFactory.newInstance().newSAXParser();
  			parser.parse(new File(CONFIG_FILE), new DefaultHandler() {
  
  				@Override
  				public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
  
  					if (qName.equals("ipconfig")) {
  						try {
  							defaultAddress = InetAddress.getByName(attributes.getValue("default")).getAddress();
  						}
  						catch (UnknownHostException e) {
  							throw new RuntimeException("Failed to resolve DSN for address: " + attributes.getValue("default"), e);
  						}
  					}
  					else if (qName.equals("iprange")) {
  						String min = attributes.getValue("min");
  						String max = attributes.getValue("max");
  						String address = attributes.getValue("address");
  						IPRange ipRange = new IPRange(min, max, address);
  						ranges.add(ipRange);
  					}
  				}
  			});
  		}
  		catch (Exception e) {
  			log.error("Critical error while parsing ipConfig", e);
  			throw new Error("Can't load ipConfig", e);
  		}
  	}
  
  	/**
  	 * Returns list of ip ranges
  	 *
  	 * @return list of ip ranges
  	 */
  	public static List<IPRange> getRanges() {
  		return ranges;
  	}
  
  	/**
  	 * Returns default address
  	 *
  	 * @return default address
  	 */
  	public static byte[] getDefaultAddress() {
  		return defaultAddress;
  	}
  }
  