Paper/patches/server/0412-Brand-support.patch
Owen 89d51d5f29
Allow enabling sand duping (#10191)
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable.

It should be noted that this decision does not promise all future exploits will be configurable.
2024-03-03 17:05:34 -05:00

77 lines
4.9 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: DigitalRegent <misterwener@gmail.com>
Date: Sat, 11 Apr 2020 13:10:58 +0200
Subject: [PATCH] Brand support
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index 966b86a2b26a32aad2656d1f2beb6daf5b81b3b1..587cce4d3878bc5cba5f4f4e58eacce2f656e242 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -273,6 +273,7 @@ public class ServerPlayer extends Player {
public boolean isRealPlayer; // Paper
public final com.destroystokyo.paper.util.misc.PooledLinkedHashSets.PooledObjectLinkedOpenHashSet<ServerPlayer> cachedSingleHashSet; // Paper
public com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent playerNaturallySpawnedEvent; // Paper - PlayerNaturallySpawnCreaturesEvent
+ public @Nullable String clientBrandName = null; // Paper - Brand support
public ServerPlayer(MinecraftServer server, ServerLevel world, GameProfile profile, ClientInformation clientOptions) {
super(world, world.getSharedSpawnPos(), world.getSharedSpawnAngle(), profile);
diff --git a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
index e69043316372d98b122ed3788fda79cdd36849e8..6597e6e9987ddb5906909c22704fdfb6557aee8e 100644
--- a/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerCommonPacketListenerImpl.java
@@ -55,6 +55,7 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
private volatile boolean suspendFlushingOnServerThread = false;
public final java.util.Map<java.util.UUID, net.kyori.adventure.resource.ResourcePackCallback> packCallbacks = new java.util.concurrent.ConcurrentHashMap<>(); // Paper - adventure resource pack callbacks
private static final long KEEPALIVE_LIMIT = Long.getLong("paper.playerconnection.keepalive", 30) * 1000; // Paper - provide property to set keepalive limit
+ protected static final ResourceLocation MINECRAFT_BRAND = new ResourceLocation("brand"); // Paper - Brand support
public ServerCommonPacketListenerImpl(MinecraftServer minecraftserver, Connection networkmanager, CommonListenerCookie commonlistenercookie, ServerPlayer player) { // CraftBukkit
this.server = minecraftserver;
@@ -110,6 +111,11 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
@Override
public void handleCustomPayload(ServerboundCustomPayloadPacket packet) {
+ // Paper start - Brand support
+ if (packet.payload() instanceof net.minecraft.network.protocol.common.custom.BrandPayload brandPayload) {
+ this.player.clientBrandName = brandPayload.brand();
+ }
+ // Paper end - Brand support
if (!(packet.payload() instanceof ServerboundCustomPayloadPacket.UnknownPayload)) {
return;
}
@@ -141,6 +147,15 @@ public abstract class ServerCommonPacketListenerImpl implements ServerCommonPack
try {
byte[] data = new byte[payload.readableBytes()];
payload.readBytes(data);
+ // Paper start - Brand support; Retain this incase upstream decides to 'break' the new mechanism in favour of backwards compat...
+ if (identifier.equals(MINECRAFT_BRAND)) {
+ try {
+ this.player.clientBrandName = new net.minecraft.network.FriendlyByteBuf(io.netty.buffer.Unpooled.copiedBuffer(data)).readUtf(256);
+ } catch (StringIndexOutOfBoundsException ex) {
+ this.player.clientBrandName = "illegal";
+ }
+ }
+ // Paper end - Brand support
this.cserver.getMessenger().dispatchIncomingMessage(this.player.getBukkitEntity(), identifier.toString(), data);
} catch (Exception ex) {
ServerGamePacketListenerImpl.LOGGER.error("Couldn\'t dispatch custom payload", ex);
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 5ba0fa6fda6d496f7540185e6dc58439cc1e04f1..16d1338df730fd66c079b66117cbef91786f2146 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -3056,6 +3056,13 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
// Paper end
};
+ // Paper start - brand support
+ @Override
+ public String getClientBrandName() {
+ return getHandle().clientBrandName;
+ }
+ // Paper end
+
public Player.Spigot spigot()
{
return this.spigot;