Paper/patches/server/0819-Add-support-for-Proxy-Protocol.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: PanSzelescik <panszelescik@gmail.com>
Date: Thu, 7 Apr 2022 16:13:39 +0200
Subject: [PATCH] Add support for Proxy Protocol
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diff --git a/build.gradle.kts b/build.gradle.kts
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index e1e8f7c42f5e68da25b11c4cfadd67425395e558..7a17e05b630517a6861c34a4561198db62acf82a 100644
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--- a/build.gradle.kts
+++ b/build.gradle.kts
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@@ -20,6 +20,7 @@ dependencies {
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*/
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implementation("org.apache.logging.log4j:log4j-core:2.14.1") // Paper - implementation
annotationProcessor("org.apache.logging.log4j:log4j-core:2.14.1") // Paper - Needed to generate meta for our Log4j plugins
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+ implementation("io.netty:netty-codec-haproxy:4.1.87.Final") // Paper - Add support for proxy protocol
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// Paper end
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implementation("org.apache.logging.log4j:log4j-iostreams:2.19.0") // Paper - remove exclusion
implementation("org.ow2.asm:asm:9.4")
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diff --git a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
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index 17f42a4097d9c91bae2ccb02365498a0f7c7f8f8..0f578e870f2bed207a8650a31e89b3672ae8a57b 100644
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--- a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
+++ b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
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@@ -106,6 +106,12 @@ public class ServerConnectionListener {
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ServerConnectionListener.LOGGER.info("Paper: Using " + com.velocitypowered.natives.util.Natives.cipher.getLoadedVariant() + " cipher from Velocity.");
// Paper end
+ // Paper start - indicate Proxy Protocol usage
+ if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.proxyProtocol) {
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+ ServerConnectionListener.LOGGER.info("Paper: Using Proxy Protocol");
+ }
+ // Paper end
+
this.channels.add(((ServerBootstrap) ((ServerBootstrap) (new ServerBootstrap()).channel(oclass)).childHandler(new ChannelInitializer<Channel>() {
protected void initChannel(Channel channel) {
try {
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@@ -120,6 +126,30 @@ public class ServerConnectionListener {
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int j = ServerConnectionListener.this.server.getRateLimitPacketsPerSecond();
Connection object = j > 0 ? new RateKickingConnection(j) : new Connection(PacketFlow.SERVERBOUND); // CraftBukkit - decompile error
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+ // Paper start - Add support for Proxy Protocol
+ if (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.proxyProtocol) {
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+ channel.pipeline().addAfter("timeout", "haproxy-decoder", new io.netty.handler.codec.haproxy.HAProxyMessageDecoder());
+ channel.pipeline().addAfter("haproxy-decoder", "haproxy-handler", new ChannelInboundHandlerAdapter() {
+ @Override
+ public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+ if (msg instanceof io.netty.handler.codec.haproxy.HAProxyMessage message) {
+ if (message.command() == io.netty.handler.codec.haproxy.HAProxyCommand.PROXY) {
+ String realaddress = message.sourceAddress();
+ int realport = message.sourcePort();
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+
+ SocketAddress socketaddr = new java.net.InetSocketAddress(realaddress, realport);
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+
+ Connection connection = (Connection) channel.pipeline().get("packet_handler");
+ connection.address = socketaddr;
+ }
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+ } else {
+ super.channelRead(ctx, msg);
+ }
+ }
+ });
+ }
+ // Paper end
+
//ServerConnectionListener.this.connections.add(object);
pending.add(object); // Paper
channelpipeline.addLast("packet_handler", (ChannelHandler) object);