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89d51d5f29
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.
132 lines
9.3 KiB
Diff
132 lines
9.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sun, 28 Jun 2020 03:59:10 -0400
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Subject: [PATCH] Fix Per World Difficulty / Remembering Difficulty
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Fixes per world difficulty with /difficulty command and also
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makes it so that the server keeps the last difficulty used instead
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of restoring the server.properties every single load.
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diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
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index f786bf10a42fa4e9f610416959c60c52729c277b..21176d6e57ae9e975b1e7de14b3364365cc1012d 100644
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--- a/src/main/java/net/minecraft/server/MinecraftServer.java
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+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
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@@ -825,7 +825,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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if (worldserver.getWorld().getKeepSpawnInMemory()) worldloadlistener.stop(); // Paper - Configurable Keep Spawn Loaded range per world
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// CraftBukkit start
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// this.updateMobSpawningFlags();
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- worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());
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+ worldserver.setSpawnSettings(worldserver.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals()); // Paper - per level difficulty (from setDifficulty(ServerLevel, Difficulty, boolean))
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this.forceTicks = false;
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// CraftBukkit end
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@@ -1768,11 +1768,14 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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}
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}
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- public void setDifficulty(Difficulty difficulty, boolean forceUpdate) {
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- if (forceUpdate || !this.worldData.isDifficultyLocked()) {
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- this.worldData.setDifficulty(this.worldData.isHardcore() ? Difficulty.HARD : difficulty);
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- this.updateMobSpawningFlags();
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- this.getPlayerList().getPlayers().forEach(this::sendDifficultyUpdate);
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+ // Paper start - per level difficulty
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+ public void setDifficulty(ServerLevel level, Difficulty difficulty, boolean forceUpdate) {
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+ PrimaryLevelData worldData = level.serverLevelData;
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+ if (forceUpdate || !worldData.isDifficultyLocked()) {
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+ worldData.setDifficulty(worldData.isHardcore() ? Difficulty.HARD : difficulty);
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+ level.setSpawnSettings(worldData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals());
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+ // this.getPlayerList().getPlayers().forEach(this::sendDifficultyUpdate);
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+ // Paper end - per level difficulty
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}
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}
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@@ -1786,7 +1789,7 @@ public abstract class MinecraftServer extends ReentrantBlockableEventLoop<TickTa
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while (iterator.hasNext()) {
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ServerLevel worldserver = (ServerLevel) iterator.next();
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- worldserver.setSpawnSettings(this.isSpawningMonsters(), this.isSpawningAnimals());
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+ worldserver.setSpawnSettings(worldserver.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && ((DedicatedServer) this).settings.getProperties().spawnMonsters, this.isSpawningAnimals()); // Paper - per level difficulty (from setDifficulty(ServerLevel, Difficulty, boolean))
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}
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}
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diff --git a/src/main/java/net/minecraft/server/commands/DifficultyCommand.java b/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
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index 997a96a21440ae72696d68f8031ece4ba487d3ef..3d8584929cee000ae7df10c5bd94f35820e70294 100644
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--- a/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
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+++ b/src/main/java/net/minecraft/server/commands/DifficultyCommand.java
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@@ -49,7 +49,7 @@ public class DifficultyCommand {
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if (worldServer.getDifficulty() == difficulty) { // CraftBukkit
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throw DifficultyCommand.ERROR_ALREADY_DIFFICULT.create(difficulty.getKey());
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} else {
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- worldServer.serverLevelData.setDifficulty(difficulty); // CraftBukkit
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+ minecraftserver.setDifficulty(worldServer, difficulty, true); // Paper - per level difficulty; don't skip other difficulty-changing logic (fix upstream's fix)
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source.sendSuccess(() -> {
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return Component.translatable("commands.difficulty.success", difficulty.getDisplayName());
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}, true);
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diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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index c41c53ee3b1a8b5c2c41fc9846f557eeb4d10f9b..ebea8a827aad108dd6d4222e8dfd251d2cea657a 100644
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--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
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@@ -325,7 +325,7 @@ public class DedicatedServer extends MinecraftServer implements ServerInterface
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@Override
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public void forceDifficulty() {
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- this.setDifficulty(this.getProperties().difficulty, true);
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+ // this.setDifficulty(this.getProperties().difficulty, true); // Paper - per level difficulty; Don't overwrite level.dat's difficulty, keep current
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}
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@Override
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diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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index e5653695a3fbcd260ce44ca37291406a1033a3fa..966b86a2b26a32aad2656d1f2beb6daf5b81b3b1 100644
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--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
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+++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
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@@ -1161,7 +1161,7 @@ public class ServerPlayer extends Player {
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this.isChangingDimension = true; // CraftBukkit - Set teleport invulnerability only if player changing worlds
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this.connection.send(new ClientboundRespawnPacket(this.createCommonSpawnInfo(worldserver), (byte) 3));
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- this.connection.send(new ClientboundChangeDifficultyPacket(this.level().getDifficulty(), this.level().getLevelData().isDifficultyLocked()));
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+ this.connection.send(new ClientboundChangeDifficultyPacket(worldserver.getDifficulty(), this.level().getLevelData().isDifficultyLocked())); // Paper - per level difficulty
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PlayerList playerlist = this.server.getPlayerList();
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playerlist.sendPlayerPermissionLevel(this);
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diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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index d78d411879275f11f395b4f9c94b7aab88342236..67e75982d712fdd2f751f2a0fcafba7aec779d74 100644
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--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
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@@ -3169,7 +3169,7 @@ public class ServerGamePacketListenerImpl extends ServerCommonPacketListenerImpl
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public void handleChangeDifficulty(ServerboundChangeDifficultyPacket packet) {
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PacketUtils.ensureRunningOnSameThread(packet, this, this.player.serverLevel());
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if (this.player.hasPermissions(2) || this.isSingleplayerOwner()) {
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- this.server.setDifficulty(packet.getDifficulty(), false);
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+ // this.server.setDifficulty(packet.getDifficulty(), false); // Paper - per level difficulty; don't allow clients to change this
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}
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}
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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index a5c84867708385ae78951872410914835ab3e7e5..edbf53c69bf788c2ac3b7d1be258e37cb801a5f6 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
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@@ -967,8 +967,8 @@ public final class CraftServer implements Server {
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org.spigotmc.SpigotConfig.init((File) this.console.options.valueOf("spigot-settings")); // Spigot
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this.console.paperConfigurations.reloadConfigs(this.console);
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for (ServerLevel world : this.console.getAllLevels()) {
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- world.serverLevelData.setDifficulty(config.difficulty);
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- world.setSpawnSettings(config.spawnMonsters, config.spawnAnimals);
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+ // world.serverLevelData.setDifficulty(config.difficulty); // Paper - per level difficulty
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+ world.setSpawnSettings(world.serverLevelData.getDifficulty() != Difficulty.PEACEFUL && config.spawnMonsters, config.spawnAnimals); // Paper - per level difficulty (from MinecraftServer#setDifficulty(ServerLevel, Difficulty, boolean))
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for (SpawnCategory spawnCategory : SpawnCategory.values()) {
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if (CraftSpawnCategory.isValidForLimits(spawnCategory)) {
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diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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index 6bb9d76f8c5f3dc683caecfbb7c7c2ca41cba659..aac25db85143ba09e96ef0775786732958f42ffb 100644
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--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
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@@ -1134,7 +1134,7 @@ public class CraftWorld extends CraftRegionAccessor implements World {
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@Override
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public void setDifficulty(Difficulty difficulty) {
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- this.getHandle().serverLevelData.setDifficulty(net.minecraft.world.Difficulty.byId(difficulty.getValue()));
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+ 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
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}
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@Override
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