Paper/patches/server/0743-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
index d16c0311142e44ec1048818221796c09ab7a90d8..f9056ee057a22a11288405cd42cd0ba4c9d120c3 100644
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--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -30,6 +30,7 @@ dependencies {
log4jPlugins.annotationProcessorConfigurationName("org.apache.logging.log4j:log4j-core:2.19.0") // Paper - Needed to generate meta for our Log4j plugins
runtimeOnly(log4jPlugins.output)
alsoShade(log4jPlugins.output)
+ implementation("io.netty:netty-codec-haproxy:4.1.97.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
Updated Upstream (Bukkit/CraftBukkit) (#10379) Updated Upstream (Bukkit/CraftBukkit) Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing Bukkit Changes: f02baa38 PR-988: Add World#getIntersectingChunks(BoundingBox) 9321d665 Move getItemInUse up to LivingEntity 819eef73 PR-959: Add access to current item's remaining ticks c4fdadb0 SPIGOT-7601: Add AbstractArrow#getItem be8261ca Add support for Java 22 26119676 PR-979: Add more translation keys 66753362 PR-985: Correct book maximum pages and characters per page documentation c8be92fa PR-980: Improve getArmorContents() documentation f1120ee2 PR-983: Expose riptide velocity to PlayerRiptideEvent CraftBukkit Changes: dfaa89bbe PR-1369: Add World#getIntersectingChunks(BoundingBox) 51bbab2b9 Move getItemInUse up to LivingEntity 668e09602 PR-1331: Add access to current item's remaining ticks a639406d1 SPIGOT-7601: Add AbstractArrow#getItem 0398930fc SPIGOT-7602: Allow opening in-world horse and related inventories ffd15611c SPIGOT-7608: Allow empty lists to morph to any PDT list 2188dcfa9 Add support for Java 22 45d6a609f SPIGOT-7604: Revert "SPIGOT-7365: DamageCause blocked by shield should trigger invulnerableTime" 06d915943 SPIGOT-7365: DamageCause blocked by shield should trigger invulnerableTime ca3bc3707 PR-1361: Add more translation keys 366c3ca80 SPIGOT-7600: EntityChangeBlockEvent is not fired for frog eggs 06d0f9ba8 SPIGOT-7593: Fix sapling growth physics / client-side updates 45c2608e4 PR-1366: Expose riptide velocity to PlayerRiptideEvent 29b6bb79b SPIGOT-7587: Remove fixes for now-resolved MC-142590 and MC-109346
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implementation("org.ow2.asm:asm-commons:9.7")
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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
index 87abd6274f9da9367094bad0c28acfa47e01c50e..4f330a44c77a7ec3237a86fda04921a8c4a1c00f 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
@@ -121,6 +121,29 @@ public class ServerConnectionListener {
Connection object = j > 0 ? new RateKickingConnection(j) : new Connection(PacketFlow.SERVERBOUND); // CraftBukkit - decompile error
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//ServerConnectionListener.this.connections.add(object); // Paper
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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 - Add support for proxy protocol
pending.add(object); // Paper - prevent blocking on adding a new connection while the server is ticking
((Connection) object).configurePacketHandler(channelpipeline);
((Connection) object).setListenerForServerboundHandshake(new ServerHandshakePacketListenerImpl(ServerConnectionListener.this.server, (Connection) object));