Paper/patches/server/0390-Fix-Per-World-Difficulty-Remembering-Difficulty.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

132 lines
9.3 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 28 Jun 2020 03:59:10 -0400
Subject: [PATCH] Fix Per World Difficulty / Remembering Difficulty
Fixes per world difficulty with /difficulty command and also
makes it so that the server keeps the last difficulty used instead
of restoring the server.properties every single load.
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index f786bf10a42fa4e9f610416959c60c52729c277b..21176d6e57ae9e975b1e7de14b3364365cc1012d 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -825,7 +825,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
if (worldserver.getWorld().getKeepSpawnInMemory()) worldloadlistener.stop(); // Paper - Configurable Keep Spawn Loaded range per world
// CraftBukkit start
// this.updateMobSpawningFlags();
- worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());
+ worldserver.setSpawnSettings(worldserver.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals()); // Paper - per level difficulty (from setDifficulty(ServerLevel, Difficulty, boolean))
this.forceTicks = false;
// CraftBukkit end
@@ -1768,11 +1768,14 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
}
}
- public void setDifficulty(Difficulty difficulty, boolean forceUpdate) {
- if (forceUpdate || !this.worldData.isDifficultyLocked()) {
- this.worldData.setDifficulty(this.worldData.isHardcore() ? Difficulty.HARD : difficulty);
- this.updateMobSpawningFlags();
- this.getPlayerList().getPlayers().forEach(this::sendDifficultyUpdate);
+ // Paper start - per level difficulty
+ public void setDifficulty(ServerLevel level, Difficulty difficulty, boolean forceUpdate) {
+ PrimaryLevelData worldData = level.serverLevelData;
+ if (forceUpdate || !worldData.isDifficultyLocked()) {
+ worldData.setDifficulty(worldData.isHardcore() ? Difficulty.HARD : difficulty);
+ level.setSpawnSettings(worldData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals());
+ // this.getPlayerList().getPlayers().forEach(this::sendDifficultyUpdate);
+ // Paper end - per level difficulty
}
}
@@ -1786,7 +1789,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
while (iterator.hasNext()) {
ServerLevel worldserver = (ServerLevel) iterator.next();
- worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());
+ worldserver.setSpawnSettings(worldserver.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals()); // Paper - per level difficulty (from setDifficulty(ServerLevel, Difficulty, boolean))
}
}
diff --git a/src/main/java/net/minecraft/server/commands/DifficultyCommand.java b/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
index 997a96a21440ae72696d68f8031ece4ba487d3ef..3d8584929cee000ae7df10c5bd94f35820e70294 100644
--- a/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
+++ b/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
@@ -49,7 +49,7 @@ public class DifficultyCommand {
if (worldServer.getDifficulty() == difficulty) { // CraftBukkit
throw DifficultyCommand.ERROR_ALREADY_DIFFICULT.create(difficulty.getKey());
} else {
- worldServer.serverLevelData.setDifficulty(difficulty); // CraftBukkit
+ minecraftserver.setDifficulty(worldServer, difficulty, true); // Paper - per level difficulty; don't skip other difficulty-changing logic (fix upstream's fix)
source.sendSuccess(() -> {
return Component.translatable("commands.difficulty.success", difficulty.getDisplayName());
}, true);
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index c41c53ee3b1a8b5c2c41fc9846f557eeb4d10f9b..ebea8a827aad108dd6d4222e8dfd251d2cea657a 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -325,7 +325,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
@Override
public void forceDifficulty() {
- this.setDifficulty(this.getProperties().difficulty, true);
+ // this.setDifficulty(this.getProperties().difficulty, true); // Paper - per level difficulty; Don't overwrite level.dat's difficulty, keep current
}
@Override
diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
index e5653695a3fbcd260ce44ca37291406a1033a3fa..966b86a2b26a32aad2656d1f2beb6daf5b81b3b1 100644
--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
@@ -1161,7 +1161,7 @@ public class ServerPlayer extends Player {
this.isChangingDimension = true; // CraftBukkit - Set teleport invulnerability only if player changing worlds
this.connection.send(new ClientboundRespawnPacket(this.createCommonSpawnInfo(worldserver), (byte) 3));
- this.connection.send(new ClientboundChangeDifficultyPacket(this.level().getDifficulty(), this.level().getLevelData().isDifficultyLocked()));
+ this.connection.send(new ClientboundChangeDifficultyPacket(worldserver.getDifficulty(), this.level().getLevelData().isDifficultyLocked())); // Paper - per level difficulty
PlayerList playerlist = this.server.getPlayerList();
playerlist.sendPlayerPermissionLevel(this);
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index d78d411879275f11f395b4f9c94b7aab88342236..67e75982d712fdd2f751f2a0fcafba7aec779d74 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -3169,7 +3169,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
public void handleChangeDifficulty(ServerboundChangeDifficultyPacket packet) {
PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
if (this.player.hasPermissions(2) || this.isSingleplayerOwner()) {
- this.server.setDifficulty(packet.getDifficulty(), false);
+ // this.server.setDifficulty(packet.getDifficulty(), false); // Paper - per level difficulty; don't allow clients to change this
}
}
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index a5c84867708385ae78951872410914835ab3e7e5..edbf53c69bf788c2ac3b7d1be258e37cb801a5f6 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -967,8 +967,8 @@ public final class CraftServer implements Server {
org.spigotmc.SpigotConfig.init((File) this.console.options.valueOf("spigot-settings")); // Spigot
this.console.paperConfigurations.reloadConfigs(this.console);
for (ServerLevel world : this.console.getAllLevels()) {
- world.serverLevelData.setDifficulty(config.difficulty);
- world.setSpawnSettings(config.spawnMonsters, config.spawnAnimals);
+ // world.serverLevelData.setDifficulty(config.difficulty); // Paper - per level difficulty
+ world.setSpawnSettings(world.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && config.spawnMonsters, config.spawnAnimals); // Paper - per level difficulty (from MinecraftServer#setDifficulty(ServerLevel, Difficulty, boolean))
for (SpawnCategory spawnCategory : SpawnCategory.values()) {
if (CraftSpawnCategory.isValidForLimits(spawnCategory)) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 6bb9d76f8c5f3dc683caecfbb7c7c2ca41cba659..aac25db85143ba09e96ef0775786732958f42ffb 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1134,7 +1134,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
@Override
public void setDifficulty(Difficulty difficulty) {
- this.getHandle().serverLevelData.setDifficulty(net.minecraft.world.Difficulty.byId(difficulty.getValue()));
+ this.getHandle().getServer().setDifficulty(this.getHandle(), net.minecraft.world.Difficulty.byId(difficulty.getValue()), true); // Paper - per level difficulty; don't skip other difficulty-changing logic
}
@Override