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Waterfall/BungeeCord-Patches/0033-Fix-potion-race-condition-on-Forge-1.8.9.patch
Shane Freeder 3426625706
Updated Upstream (BungeeCord) 
Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

BungeeCord Changes:
4cccf537 Minecraft 1.15 support
2019-12-10 22:53:39 +00:00

282 lines
11 KiB
Diff
Raw Blame History

From 87d20245a793e386d85bfcf181701da0d9847d18 Mon Sep 17 00:00:00 2001
From: Aaron Hill <aa1ronham@gmail.com>
Date: Thu, 15 Sep 2016 22:38:37 +0200
Subject: [PATCH] Fix potion race condition on Forge 1.8.9
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/AbstractPacketHandler.java b/protocol/src/main/java/net/md_5/bungee/protocol/AbstractPacketHandler.java
index 39e257c3..e4f14974 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/AbstractPacketHandler.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/AbstractPacketHandler.java
@@ -7,6 +7,8 @@ import net.md_5.bungee.protocol.packet.ClientStatus;
import net.md_5.bungee.protocol.packet.Commands;
import net.md_5.bungee.protocol.packet.EncryptionRequest;
import net.md_5.bungee.protocol.packet.EncryptionResponse;
+import net.md_5.bungee.protocol.packet.EntityEffect; // Waterfall
+import net.md_5.bungee.protocol.packet.EntityRemoveEffect; // Waterfall
import net.md_5.bungee.protocol.packet.EntityStatus;
import net.md_5.bungee.protocol.packet.Handshake;
import net.md_5.bungee.protocol.packet.KeepAlive;
@@ -173,4 +175,14 @@ public abstract class AbstractPacketHandler
public void handle(ViewDistance viewDistance) throws Exception
{
}
+
+ // Waterfall start
+ public void handle(EntityEffect entityEffect) throws Exception
+ {
+ }
+
+ public void handle(EntityRemoveEffect removeEffect) throws Exception
+ {
+ }
+ // Waterfall end
}
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java b/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
index 31cbaa53..3556eda0 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/Protocol.java
@@ -16,6 +16,8 @@ import net.md_5.bungee.protocol.packet.Commands;
import net.md_5.bungee.protocol.packet.EncryptionRequest;
import net.md_5.bungee.protocol.packet.EncryptionResponse;
import net.md_5.bungee.protocol.packet.EntityStatus;
+import net.md_5.bungee.protocol.packet.EntityEffect;
+import net.md_5.bungee.protocol.packet.EntityRemoveEffect;
import net.md_5.bungee.protocol.packet.Handshake;
import net.md_5.bungee.protocol.packet.KeepAlive;
import net.md_5.bungee.protocol.packet.Kick;
@@ -97,6 +99,29 @@ public enum Protocol
map( ProtocolConstants.MINECRAFT_1_9, 0x0C ),
map( ProtocolConstants.MINECRAFT_1_15, 0x0D )
);
+ // Waterfall start
+ TO_CLIENT.registerPacket(
+ EntityEffect.class,
+ map(ProtocolConstants.MINECRAFT_1_8, 0x1D),
+ map(ProtocolConstants.MINECRAFT_1_9, 0x4C),
+ map(ProtocolConstants.MINECRAFT_1_9_4, 0x4B),
+ map(ProtocolConstants.MINECRAFT_1_12, 0x4E),
+ map(ProtocolConstants.MINECRAFT_1_12_1, 0x4F),
+ map(ProtocolConstants.MINECRAFT_1_13, 0x53),
+ map(ProtocolConstants.MINECRAFT_1_14, 0x59),
+ map(ProtocolConstants.MINECRAFT_1_15, 0x5A)
+ );
+ TO_CLIENT.registerPacket(
+ EntityRemoveEffect.class,
+ map(ProtocolConstants.MINECRAFT_1_8, 0x1E),
+ map(ProtocolConstants.MINECRAFT_1_9, 0x31),
+ map(ProtocolConstants.MINECRAFT_1_12, 0x32),
+ map(ProtocolConstants.MINECRAFT_1_12_1, 0x33),
+ map(ProtocolConstants.MINECRAFT_1_13, 0x36),
+ map(ProtocolConstants.MINECRAFT_1_14, 0x38),
+ map(ProtocolConstants.MINECRAFT_1_15, 0x39)
+ );
+ // Waterfall end
TO_CLIENT.registerPacket(
PlayerListItem.class, // PlayerInfo
map( ProtocolConstants.MINECRAFT_1_8, 0x38 ),
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/packet/EntityEffect.java b/protocol/src/main/java/net/md_5/bungee/protocol/packet/EntityEffect.java
new file mode 100644
index 00000000..d11a9ea9
--- /dev/null
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/packet/EntityEffect.java
@@ -0,0 +1,45 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class EntityEffect extends DefinedPacket {
+
+ private int entityId;
+ private int effectId;
+ private int amplifier;
+ private int duration;
+ private boolean hideParticles;
+
+ @Override
+ public void read(ByteBuf buf) {
+ this.entityId = readVarInt(buf);
+ this.effectId = buf.readUnsignedByte();
+ this.amplifier = buf.readUnsignedByte();
+ this.duration = readVarInt(buf);
+ this.hideParticles = buf.readBoolean();
+ }
+
+ @Override
+ public void write(ByteBuf buf) {
+ writeVarInt(this.entityId, buf);
+ buf.writeByte(this.effectId);
+ buf.writeByte(this.amplifier);
+ writeVarInt(this.duration, buf);
+ buf.writeBoolean(this.hideParticles);
+ }
+
+ @Override
+ public void handle(AbstractPacketHandler handler) throws Exception {
+ handler.handle(this);
+ }
+}
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/packet/EntityRemoveEffect.java b/protocol/src/main/java/net/md_5/bungee/protocol/packet/EntityRemoveEffect.java
new file mode 100644
index 00000000..7ed2dc3a
--- /dev/null
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/packet/EntityRemoveEffect.java
@@ -0,0 +1,36 @@
+package net.md_5.bungee.protocol.packet;
+
+import io.netty.buffer.ByteBuf;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.NoArgsConstructor;
+import net.md_5.bungee.protocol.AbstractPacketHandler;
+import net.md_5.bungee.protocol.DefinedPacket;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@EqualsAndHashCode(callSuper = false)
+public class EntityRemoveEffect extends DefinedPacket {
+
+ private int entityId;
+ private int effectId;
+
+ @Override
+ public void read(ByteBuf buf) {
+ this.entityId = readVarInt(buf);
+ this.effectId = buf.readUnsignedByte();
+ }
+
+ @Override
+ public void write(ByteBuf buf) {
+ writeVarInt(this.entityId, buf);
+ buf.writeByte(effectId);
+ }
+
+ @Override
+ public void handle(AbstractPacketHandler handler) throws Exception {
+ handler.handle(this);
+ }
+}
diff --git a/proxy/src/main/java/net/md_5/bungee/UserConnection.java b/proxy/src/main/java/net/md_5/bungee/UserConnection.java
index f3466956..74aa4f3e 100644
--- a/proxy/src/main/java/net/md_5/bungee/UserConnection.java
+++ b/proxy/src/main/java/net/md_5/bungee/UserConnection.java
@@ -1,7 +1,9 @@
package net.md_5.bungee;
import com.google.common.base.Preconditions;
+import com.google.common.collect.HashMultimap;
import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Multimap;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
@@ -125,6 +127,10 @@ public final class UserConnection implements ProxiedPlayer
private final Scoreboard serverSentScoreboard = new Scoreboard();
@Getter
private final Collection<UUID> sentBossBars = new HashSet<>();
+ // Waterfall start
+ @Getter
+ private final Multimap<Integer, Integer> potions = HashMultimap.create();
+ // Waterfall end
/*========================================================================*/
@Getter
private String displayName;
diff --git a/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java b/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java
index 034040a0..fd14f518 100644
--- a/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java
+++ b/proxy/src/main/java/net/md_5/bungee/connection/DownstreamBridge.java
@@ -47,6 +47,8 @@ import net.md_5.bungee.protocol.PacketWrapper;
import net.md_5.bungee.protocol.ProtocolConstants;
import net.md_5.bungee.protocol.packet.BossBar;
import net.md_5.bungee.protocol.packet.Commands;
+import net.md_5.bungee.protocol.packet.EntityEffect;
+import net.md_5.bungee.protocol.packet.EntityRemoveEffect;
import net.md_5.bungee.protocol.packet.KeepAlive;
import net.md_5.bungee.protocol.packet.Kick;
import net.md_5.bungee.protocol.packet.PlayerListItem;
@@ -582,6 +584,32 @@ public class DownstreamBridge extends PacketHandler
}
}
+ // Waterfall start
+ @Override
+ public void handle(EntityEffect entityEffect) throws Exception
+ {
+ // Don't send any potions when switching between servers (which involves a handshake), which can trigger a race
+ // condition on the client.
+ if (this.con.getForgeClientHandler().isForgeUser() && !this.con.getForgeClientHandler().isHandshakeComplete()) {
+ throw CancelSendSignal.INSTANCE;
+ }
+ con.getPotions().put(rewriteEntityId(entityEffect.getEntityId()), entityEffect.getEffectId());
+ }
+
+ @Override
+ public void handle(EntityRemoveEffect removeEffect) throws Exception
+ {
+ con.getPotions().remove(rewriteEntityId(removeEffect.getEntityId()), removeEffect.getEffectId());
+ }
+
+ private int rewriteEntityId(int entityId) {
+ if (entityId == con.getServerEntityId()) {
+ return con.getClientEntityId();
+ }
+ return entityId;
+ }
+ // Waterfall end
+
@Override
public void handle(Respawn respawn)
{
diff --git a/proxy/src/main/java/net/md_5/bungee/forge/ForgeClientHandler.java b/proxy/src/main/java/net/md_5/bungee/forge/ForgeClientHandler.java
index 0d683856..c1272da3 100644
--- a/proxy/src/main/java/net/md_5/bungee/forge/ForgeClientHandler.java
+++ b/proxy/src/main/java/net/md_5/bungee/forge/ForgeClientHandler.java
@@ -9,6 +9,8 @@ import lombok.NonNull;
import lombok.RequiredArgsConstructor;
import lombok.Setter;
import net.md_5.bungee.UserConnection;
+import net.md_5.bungee.protocol.ProtocolConstants;
+import net.md_5.bungee.protocol.packet.EntityRemoveEffect;
import net.md_5.bungee.protocol.packet.PluginMessage;
/**
@@ -92,9 +94,23 @@ public class ForgeClientHandler
public void resetHandshake()
{
state = ForgeClientHandshakeState.HELLO;
+
+ // This issue only exists in Forge 1.8.9
+ if (this.con.getPendingConnection().getVersion() == ProtocolConstants.MINECRAFT_1_8) {
+ this.resetAllThePotions(con);
+ }
+
con.unsafe().sendPacket( ForgeConstants.FML_RESET_HANDSHAKE );
}
+ private void resetAllThePotions(UserConnection con) {
+ // Just to be sure
+ for (Map.Entry<Integer, Integer> entry: con.getPotions().entries()) {
+ con.unsafe().sendPacket(new EntityRemoveEffect(entry.getKey(), entry.getValue()));
+ }
+ con.getPotions().clear();
+ }
+
/**
* Sends the server mod list to the client, or stores it for sending later.
*
--
2.24.0
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