Paper/patches/server/0155-Expose-client-protocol-version-and-virtual-host.patch
Riley Park f17519338b
Expose server build information (#10729)
* Expose server build information

* squash patches

* final tweaks

---------

Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>
Co-authored-by: masmc05 <masmc05@gmail.com>
2024-05-15 17:06:59 -07:00

117 lines
4.8 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Minecrell <minecrell@minecrell.net>
Date: Tue, 10 Oct 2017 18:45:20 +0200
Subject: [PATCH] Expose client protocol version and virtual host
diff --git a/src/main/java/com/destroystokyo/paper/network/PaperNetworkClient.java b/src/main/java/com/destroystokyo/paper/network/PaperNetworkClient.java
new file mode 100644
index 0000000000000000000000000000000000000000..a5a7624f1f372a26b982836cd31cff15e2589e9b
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/network/PaperNetworkClient.java
@@ -0,0 +1,49 @@
+package com.destroystokyo.paper.network;
+
+import java.net.InetSocketAddress;
+
+import javax.annotation.Nullable;
+import net.minecraft.network.Connection;
+
+public class PaperNetworkClient implements NetworkClient {
+
+ private final Connection networkManager;
+
+ PaperNetworkClient(Connection networkManager) {
+ this.networkManager = networkManager;
+ }
+
+ @Override
+ public InetSocketAddress getAddress() {
+ return (InetSocketAddress) this.networkManager.getRemoteAddress();
+ }
+
+ @Override
+ public int getProtocolVersion() {
+ return this.networkManager.protocolVersion;
+ }
+
+ @Nullable
+ @Override
+ public InetSocketAddress getVirtualHost() {
+ return this.networkManager.virtualHost;
+ }
+
+ public static InetSocketAddress prepareVirtualHost(String host, int port) {
+ int len = host.length();
+
+ // FML appends a marker to the host to recognize FML clients (\0FML\0)
+ int pos = host.indexOf('\0');
+ if (pos >= 0) {
+ len = pos;
+ }
+
+ // When clients connect with a SRV record, their host contains a trailing '.'
+ if (len > 0 && host.charAt(len - 1) == '.') {
+ len--;
+ }
+
+ return InetSocketAddress.createUnresolved(host.substring(0, len), port);
+ }
+
+}
diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
index 0ccfdceea8e211c595be2dad2392876109b4eeef..1321b9adba4c9e45dce0f717d44a7cb4e64b9bf6 100644
--- a/src/main/java/net/minecraft/network/Connection.java
+++ b/src/main/java/net/minecraft/network/Connection.java
@@ -120,6 +120,10 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
@Nullable
BandwidthDebugMonitor bandwidthDebugMonitor;
public String hostname = ""; // CraftBukkit - add field
+ // Paper start - NetworkClient implementation
+ public int protocolVersion;
+ public java.net.InetSocketAddress virtualHost;
+ // Paper end
// Paper start - add utility methods
public final net.minecraft.server.level.ServerPlayer getPlayer() {
diff --git a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
index 9214fb6b8e21ff6aee8be0691f1fe6e41c901ba3..65333e0244d7c3c415266f1740929761ca890af7 100644
--- a/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerHandshakePacketListenerImpl.java
@@ -69,6 +69,10 @@ public class ServerHandshakePacketListenerImpl implements ServerHandshakePacketL
throw new UnsupportedOperationException("Invalid intention " + String.valueOf(packet.intention()));
}
+ // Paper start - NetworkClient implementation
+ this.connection.protocolVersion = packet.protocolVersion();
+ this.connection.virtualHost = com.destroystokyo.paper.network.PaperNetworkClient.prepareVirtualHost(packet.hostName(), packet.port());
+ // Paper end
}
private void beginLogin(ClientIntentionPacket packet, boolean transfer) {
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 3b0d7980801688d83bd4aa33f58e560d62659839..7635c501d71273ef85e6500ff15434c6b89c9e3c 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -332,6 +332,20 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
this.getHandle().transferCookieConnection.sendPacket(new ClientboundTransferPacket(host, port));
}
+ // Paper start - Implement NetworkClient
+ @Override
+ public int getProtocolVersion() {
+ if (getHandle().connection == null) return -1;
+ return getHandle().connection.connection.protocolVersion;
+ }
+
+ @Override
+ public InetSocketAddress getVirtualHost() {
+ if (getHandle().connection == null) return null;
+ return getHandle().connection.connection.virtualHost;
+ }
+ // Paper end
+
@Override
public double getEyeHeight(boolean ignorePose) {
if (ignorePose) {