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.loginserver.utils;
  
  import javolution.util.FastMap;
  
  import com.aionemu.loginserver.configs.Config;
  
  /**
   * @author Mr. Poke
   *
   */
  public class BruteForceProtector {
  
      private FastMap<String, FailedLoginInfo> failedConnections = new FastMap<String, FailedLoginInfo>();
  
      class FailedLoginInfo {
  
          private int count;
          private long time;
  
          /**
           * @param count
           * @param time
           */
          public FailedLoginInfo(int count, long time) {
              super();
              this.count = count;
              this.time = time;
          }
  
          public void increseCount() {
              count++;
          }
  
          /**
           * @return the count
           */
          public int getCount() {
              return count;
          }
  
          /**
           * @return the time
           */
          public long getTime() {
              return time;
          }
      }
  
      public static final BruteForceProtector getInstance() {
          return SingletonHolder.instance;
      }
  
      public boolean addFailedConnect(String ip) {
          FailedLoginInfo failed = failedConnections.get(ip);
          if (failed == null || System.currentTimeMillis() - failed.getTime() > Config.WRONG_LOGIN_BAN_TIME * 1000 * 60) {
              failedConnections.put(ip, new FailedLoginInfo(1, System.currentTimeMillis()));
          } else {
              if (failed.getCount() >= Config.LOGIN_TRY_BEFORE_BAN) {
                  failedConnections.remove(ip);
                  return true;
              } else {
                  failed.increseCount();
              }
          }
          return false;
      }
  
      @SuppressWarnings("synthetic-access")
      private static class SingletonHolder {
  
          protected static final BruteForceProtector instance = new BruteForceProtector();
      }
  }
  