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Paper/patches/server/0548-Add-Unix-domain-socket-support.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrew Steinborn <git@steinborn.me>
Date: Tue, 11 May 2021 17:39:22 -0400
Subject: [PATCH] Add Unix domain socket support
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index 5d62639b18d0bf8f5f7c8adc3470a6087980241b..4bc7b3d7c5214b3272614fe3fce8e4d8d2264867 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -232,6 +232,20 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
this.setEnforceWhitelist(dedicatedserverproperties.enforceWhitelist);
// this.worldData.setGameType(dedicatedserverproperties.gamemode); // CraftBukkit - moved to world loading
DedicatedServer.LOGGER.info("Default game type: {}", dedicatedserverproperties.gamemode);
+ // Paper start - Unix domain socket support
+ java.net.SocketAddress bindAddress;
+ if (this.getLocalIp().startsWith("unix:")) {
+ if (!io.netty.channel.epoll.Epoll.isAvailable()) {
+ DedicatedServer.LOGGER.error("**** INVALID CONFIGURATION!");
+ DedicatedServer.LOGGER.error("You are trying to use a Unix domain socket but you're not on a supported OS.");
+ return false;
+ } else if (!io.papermc.paper.configuration.GlobalConfiguration.get().proxies.velocity.enabled && !org.spigotmc.SpigotConfig.bungee) {
+ DedicatedServer.LOGGER.error("**** INVALID CONFIGURATION!");
+ DedicatedServer.LOGGER.error("Unix domain sockets require IPs to be forwarded from a proxy.");
+ return false;
+ }
+ bindAddress = new io.netty.channel.unix.DomainSocketAddress(this.getLocalIp().substring("unix:".length()));
+ } else {
InetAddress inetaddress = null;
if (!this.getLocalIp().isEmpty()) {
@@ -241,12 +255,15 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
if (this.getPort() < 0) {
this.setPort(dedicatedserverproperties.serverPort);
}
+ bindAddress = new java.net.InetSocketAddress(inetaddress, this.getPort());
+ }
+ // Paper end - Unix domain socket support
this.initializeKeyPair();
DedicatedServer.LOGGER.info("Starting Minecraft server on {}:{}", this.getLocalIp().isEmpty() ? "*" : this.getLocalIp(), this.getPort());
try {
- this.getConnection().startTcpServerListener(inetaddress, this.getPort());
+ this.getConnection().bind(bindAddress); // Paper - Unix domain socket support
} catch (IOException ioexception) {
DedicatedServer.LOGGER.warn("**** FAILED TO BIND TO PORT!");
DedicatedServer.LOGGER.warn("The exception was: {}", ioexception.toString());
diff --git a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
index d6d7f1c446ba5507f67038ff27775ba75156f4a7..c63c194c44646e6bc1a59426552787011fc2ced5 100644
--- a/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
+++ b/src/main/java/net/minecraft/server/network/ServerConnectionListener.java
@@ -76,7 +76,12 @@ public class ServerConnectionListener {
this.running = true;
}
+ // Paper start - Unix domain socket support
public void startTcpServerListener(@Nullable InetAddress address, int port) throws IOException {
+ bind(new java.net.InetSocketAddress(address, port));
+ }
+ public void bind(java.net.SocketAddress address) throws IOException {
+ // Paper end - Unix domain socket support
List list = this.channels;
synchronized (this.channels) {
@@ -84,7 +89,13 @@ public class ServerConnectionListener {
EventLoopGroup eventloopgroup;
if (Epoll.isAvailable() && this.server.isEpollEnabled()) {
+ // Paper start - Unix domain socket support
+ if (address instanceof io.netty.channel.unix.DomainSocketAddress) {
+ oclass = io.netty.channel.epoll.EpollServerDomainSocketChannel.class;
+ } else {
oclass = EpollServerSocketChannel.class;
+ }
+ // Paper end - Unix domain socket support
eventloopgroup = (EventLoopGroup) ServerConnectionListener.SERVER_EPOLL_EVENT_GROUP.get();
ServerConnectionListener.LOGGER.info("Using epoll channel type");
} else {
@@ -117,7 +128,7 @@ public class ServerConnectionListener {
((Connection) object).setListenerForServerboundHandshake(new ServerHandshakePacketListenerImpl(ServerConnectionListener.this.server, (Connection) object));
io.papermc.paper.network.ChannelInitializeListenerHolder.callListeners(channel); // Paper - Add Channel initialization listeners
}
- }).group(eventloopgroup).localAddress(address, port)).option(ChannelOption.AUTO_READ, false).bind().syncUninterruptibly()); // CraftBukkit
+ }).group(eventloopgroup).localAddress(address)).option(ChannelOption.AUTO_READ, false).bind().syncUninterruptibly()); // CraftBukkit // Paper - Unix domain socket support
}
}
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index a04c7677ded862890e6e809db610817b4cfff56a..f4c6e815253f3e49577c554bf632e5c9f4f578ff 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2534,6 +2534,11 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
// Spigot Start
public SocketAddress getRawAddress()
{
+ // Paper start - Unix domain socket support; this can be nullable in the case of a Unix domain socket, so if it is, fake something
+ if (connection.channel.remoteAddress() == null) {
+ return new java.net.InetSocketAddress(java.net.InetAddress.getLoopbackAddress(), 0);
+ }
+ // Paper end - Unix domain socket support
return this.connection.channel.remoteAddress();
}
// Spigot End
diff --git a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
index b5d8ef9dd24687b99f5cf547574351c359fb85ba..45a2683c9489bee6d67a1f3d702c17f2e9dc02e4 100644
--- a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
@@ -80,6 +80,7 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
this.connection.setupOutboundProtocol(LoginProtocols.CLIENTBOUND);
// CraftBukkit start - Connection throttle
try {
+ if (!(this.connection.channel.localAddress() instanceof io.netty.channel.unix.DomainSocketAddress)) { // Paper - Unix domain socket support; the connection throttle is useless when you have a Unix domain socket
long currentTime = System.currentTimeMillis();
long connectionThrottle = this.server.server.getConnectionThrottle();
InetAddress address = ((java.net.InetSocketAddress) this.connection.getRemoteAddress()).getAddress();
@@ -108,6 +109,7 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
}
}
}
+ } // Paper - Unix domain socket support
} catch (Throwable t) {
org.apache.logging.log4j.LogManager.getLogger().debug("Failed to check connection throttle", t);
}
@@ -165,8 +167,11 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
if (!handledByEvent && proxyLogicEnabled) { // Paper
// if (org.spigotmc.SpigotConfig.bungee) { // Paper - comment out, we check above!
if ( ( split.length == 3 || split.length == 4 ) && ( ServerHandshakePacketListenerImpl.BYPASS_HOSTCHECK || ServerHandshakePacketListenerImpl.HOST_PATTERN.matcher( split[1] ).matches() ) ) { // Paper - Add bypass host check
+ // Paper start - Unix domain socket support
+ java.net.SocketAddress socketAddress = this.connection.getRemoteAddress();
this.connection.hostname = split[0];
- this.connection.address = new java.net.InetSocketAddress(split[1], ((java.net.InetSocketAddress) this.connection.getRemoteAddress()).getPort());
+ this.connection.address = new java.net.InetSocketAddress(split[1], socketAddress instanceof java.net.InetSocketAddress ? ((java.net.InetSocketAddress) socketAddress).getPort() : 0);
+ // Paper end - Unix domain socket support
this.connection.spoofedUUID = com.mojang.util.UndashedUuid.fromStringLenient( split[2] );
} else
{
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