60 lines
2.5 KiB
Java
60 lines
2.5 KiB
Java
/*
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* This file is part of ViaProxy - https://github.com/RaphiMC/ViaProxy
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* Copyright (C) 2021-2024 RK_01/RaphiMC and contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.raphimc.viaproxy.proxy.client2proxy.passthrough;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandler;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.SimpleChannelInboundHandler;
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import net.raphimc.viaproxy.ViaProxy;
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import net.raphimc.viaproxy.plugins.events.Client2ProxyHandlerCreationEvent;
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import net.raphimc.viaproxy.proxy.util.ExceptionUtil;
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import java.util.function.Supplier;
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public class LegacyPassthroughInitialHandler extends SimpleChannelInboundHandler<ByteBuf> {
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@Override
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protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) {
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if (!ctx.channel().isOpen()) return;
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if (!msg.isReadable()) return;
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final int lengthOrPacketId = msg.getUnsignedByte(0);
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ctx.pipeline().remove(this);
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if (lengthOrPacketId == 0/*classic*/ || lengthOrPacketId == 1/*a1.0.15*/ || lengthOrPacketId == 2/*<= 1.6.4*/ || lengthOrPacketId == 254/*<= 1.6.4 (ping)*/) {
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while (ctx.pipeline().last() != null) {
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ctx.pipeline().removeLast();
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}
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final Supplier<ChannelHandler> handlerSupplier = () -> ViaProxy.EVENT_MANAGER.call(new Client2ProxyHandlerCreationEvent(new PassthroughClient2ProxyHandler(), true)).getHandler();
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final PassthroughClient2ProxyChannelInitializer channelInitializer = new PassthroughClient2ProxyChannelInitializer(handlerSupplier);
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channelInitializer.initChannel(ctx.channel());
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ctx.channel().pipeline().fireChannelActive();
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}
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ctx.pipeline().fireChannelRead(msg.retain());
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
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ExceptionUtil.handleNettyException(ctx, cause, null);
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}
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}
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