/* * Copyright (c) 2019-2024 GeyserMC. http://geysermc.org * * 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. * * @author GeyserMC * @link https://github.com/GeyserMC/Geyser */ package org.geysermc.geyser.network; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.ChannelInboundHandlerAdapter; import lombok.RequiredArgsConstructor; import org.geysermc.geyser.session.GeyserSession; import java.util.stream.Stream; @RequiredArgsConstructor public class InvalidPacketHandler extends ChannelInboundHandlerAdapter { public static final String NAME = "rak-error-handler"; private final GeyserSession session; @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { Throwable rootCause = Stream.iterate(cause, Throwable::getCause) .filter(element -> element.getCause() == null) .findFirst() .orElse(cause); if (!(rootCause instanceof IllegalArgumentException)) { super.exceptionCaught(ctx, cause); return; } // Kick users that try to send illegal packets session.getGeyser().getLogger().warning(rootCause.getMessage()); session.disconnect("Invalid packet received!"); } }