eu.xworlds.util.raknet.ConnectionHandler.java Source code

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Here is the source code for eu.xworlds.util.raknet.ConnectionHandler.java

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/*
This file is part of "xWorlds utilities".
    
"xWorlds utilities" 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.
    
"xWorlds utilities" 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 "nukkit xWorlds plugin". If not, see <http://www.gnu.org/licenses/>.
    
 */
package eu.xworlds.util.raknet;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.socket.DatagramPacket;

/**
 * Pipeline for incoming server connections.
 * 
 * <p>
 * This handler asks the server listeners if the incoming traffic should be blocked. This can be used to establish some kind of spam protection.
 * </p>
 * 
 * @author mepeisen
 */
class ConnectionHandler extends SimpleChannelInboundHandler<DatagramPacket> {

    /** the raknet server listeners. */
    private RaknetServerListener[] listeners;

    /**
     * The handler for incoming connections.
     * 
     * @param serverListeners
     *            the server listeners.
     */
    public ConnectionHandler(RaknetServerListener[] serverListeners) {
        this.listeners = serverListeners;
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket msg) throws Exception {
        for (final RaknetServerListener listener : this.listeners) {
            if (listener.isBlocked(ctx, msg)) {
                ctx.fireChannelReadComplete();
            } else {
                ctx.fireChannelRead(msg);
            }
        }
    }

}