mirror of https://github.com/GeyserMC/Geyser.git
82 lines
3.7 KiB
Java
82 lines
3.7 KiB
Java
/*
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* Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @author GeyserMC
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* @link https://github.com/GeyserMC/Geyser
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*/
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package org.geysermc.geyser.network.netty.proxy;
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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 io.netty.channel.socket.DatagramPacket;
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import io.netty.handler.codec.haproxy.HAProxyMessage;
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import io.netty.handler.codec.haproxy.HAProxyProtocolException;
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import io.netty.util.internal.logging.InternalLogger;
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import io.netty.util.internal.logging.InternalLoggerFactory;
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import org.cloudburstmc.protocol.bedrock.BedrockPeer;
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import org.geysermc.geyser.GeyserImpl;
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import org.geysermc.geyser.network.GeyserBedrockPeer;
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import java.net.InetSocketAddress;
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@ChannelHandler.Sharable
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public class ProxyServerHandler extends SimpleChannelInboundHandler<DatagramPacket> {
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private static final InternalLogger log = InternalLoggerFactory.getInstance(ProxyServerHandler.class);
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public static final String NAME = "rak-proxy-server-handler";
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@Override
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protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket packet) {
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ByteBuf content = packet.content();
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GeyserBedrockPeer peer = (GeyserBedrockPeer) ctx.pipeline().get(BedrockPeer.NAME);
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int detectedVersion = peer != null ? -1 : ProxyProtocolDecoder.findVersion(content);
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InetSocketAddress presentAddress = GeyserImpl.getInstance().getGeyserServer().getProxiedAddresses().get(packet.sender());
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if (presentAddress == null && detectedVersion == -1) {
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// We haven't received a header from given address before and we couldn't detect a
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// PROXY header, ignore.
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return;
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}
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if (presentAddress == null) {
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final HAProxyMessage decoded;
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try {
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if ((decoded = ProxyProtocolDecoder.decode(content, detectedVersion)) == null) {
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// PROXY header was not present in the packet, ignore.
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return;
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}
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} catch (HAProxyProtocolException e) {
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log.debug("{} sent malformed PROXY header", packet.sender(), e);
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return;
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}
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presentAddress = new InetSocketAddress(decoded.sourceAddress(), decoded.sourcePort());
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log.debug("Got PROXY header: (from {}) {}", packet.sender(), presentAddress);
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GeyserImpl.getInstance().getGeyserServer().getProxiedAddresses().put(packet.sender(), presentAddress);
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} else {
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log.trace("Reusing PROXY header: (from {}) {}", packet.sender(), presentAddress);
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}
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ctx.fireChannelRead(packet.retain());
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}
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} |