4d40e87b33
Had to drop some hunks modifying getEntities, as those methods were rewritten by Mojang in 1.17
40 lines
2.5 KiB
Diff
40 lines
2.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Zach Brown <zach@zachbr.io>
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Date: Tue, 23 Jul 2019 20:44:47 -0500
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Subject: [PATCH] Do not let the server load chunks from newer versions
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If the server attempts to load a chunk generated by a newer version of
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the game, immediately stop the server to prevent data corruption.
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You can override this functionality at your own peril.
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diff --git a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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index 1f95ac18990822a64f0bb2af947693c4b88cdf73..6b7d3433c6e26888b3c718cfe13237342ad9b2b4 100644
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--- a/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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+++ b/src/main/java/net/minecraft/world/level/chunk/storage/ChunkSerializer.java
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@@ -98,10 +98,25 @@ public class ChunkSerializer {
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holder.tasks.forEach(Runnable::run);
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return holder.protoChunk;
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}
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+
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+ // Paper start
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+ private static final int CURRENT_DATA_VERSION = SharedConstants.getCurrentVersion().getWorldVersion();
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+ private static final boolean JUST_CORRUPT_IT = Boolean.getBoolean("Paper.ignoreWorldDataVersion");
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+ // Paper end
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+
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public static InProgressChunkHolder loadChunk(ServerLevel world, StructureManager structureManager, PoiManager poiStorage, ChunkPos pos, CompoundTag nbt, boolean distinguish) {
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java.util.ArrayDeque<Runnable> tasksToExecuteOnMain = new java.util.ArrayDeque<>();
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// Paper end
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ChunkGenerator chunkgenerator = world.getChunkSource().getGenerator();
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+ // Paper start - Do NOT attempt to load chunks saved with newer versions
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+ if (nbt.contains("DataVersion", 99)) {
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+ int dataVersion = nbt.getInt("DataVersion");
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+ if (!JUST_CORRUPT_IT && dataVersion > CURRENT_DATA_VERSION) {
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+ new RuntimeException("Server attempted to load chunk saved with newer version of minecraft! " + dataVersion + " > " + CURRENT_DATA_VERSION).printStackTrace();
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+ System.exit(1);
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+ }
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+ }
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+ // Paper end
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BiomeSource worldchunkmanager = chunkgenerator.getBiomeSource();
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CompoundTag nbttagcompound1 = nbt.getCompound("Level"); // Paper - diff on change, see ChunkSerializer#getChunkCoordinate
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ChunkPos chunkcoordintpair1 = new ChunkPos(nbttagcompound1.getInt("xPos"), nbttagcompound1.getInt("zPos")); // Paper - diff on change, see ChunkSerializer#getChunkCoordinate
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