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Paper-Old/patches/server/0532-Add-Unix-domain-socket-support.patch
Spottedleaf 8c5b837e05 Rework async chunk api implementation 
Firstly, the old methods all routed to the CompletableFuture method.
However, the CF method could not guarantee that if the caller
was off-main that the future would be "completed" on-main. Since
the callback methods used the CF one, this meant that the callback
methods did not guarantee that the callbacks were to be called on
the main thread.

Now, all methods route to getChunkAtAsync(x, z, gen, urgent, cb)
so that the methods with the callback are guaranteed to invoke
the callback on the main thread. The CF behavior remains unchanged;
it may still appear to complete on main if invoked off-main.

Secondly, remove the scheduleOnMain invocation in the async
chunk completion. This unnecessarily delays the callback
by 1 tick.

Thirdly, add getChunksAtAsync(minX, minZ, maxX, maxZ, ...) which
will load chunks within an area. This method is provided as a helper
as keeping all chunks loaded within an area can be complicated to
implement for plugins (due to the lacking ticket API), and is
already implemented internally anyways.

Fourthly, remove the ticket addition that occured with getChunkAt
and getChunkAtAsync. The ticket addition may delay the unloading
of the chunk unnecessarily. It also fixes a very rare timing bug
where the future/callback would be completed after the chunk
unloads.
2024-11-18 23:00:59 -08:00

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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 761663514b98a1c0a0a905150411aff450a0cc50..21d6f728d6ecd35a05933e9406a386c36135a456 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -233,6 +233,20 @@ 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()) {
@@ -242,12 +256,15 @@ 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 cad988c90749183e3af01b319206d49a8734ac15..34258a58ea7b75363eff825e3db27832d3559557 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -2566,6 +2566,11 @@ 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 a5bbea6a073e00c10c3c5facd997eb8473fd9a5f..ddf42645402afefc0f5caebc684b191eef9d6ec2 100644
--- a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
@@ -81,6 +81,7 @@ 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();
@@ -109,6 +110,7 @@ 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);
}
@@ -166,8 +168,11 @@ 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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