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Ignore invalid chunk data in legacy versions (#3538)

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RK_01 2023-12-03 18:37:57 +01:00 committed by GitHub
parent 1f453dc0d9
commit 851295d48c
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 105 additions and 39 deletions
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11
api/src/main/java/com/viaversion/viaversion/api/type/types/chunk/ChunkType1_8.java
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@ -22,15 +22,19 @@
*/
package com.viaversion.viaversion.api.type.types.chunk;
import com.viaversion.viaversion.api.Via;
import com.viaversion.viaversion.api.minecraft.Environment;
import com.viaversion.viaversion.api.minecraft.chunks.BaseChunk;
import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
import com.viaversion.viaversion.api.type.Type;
import com.viaversion.viaversion.api.type.types.version.Types1_8;
import com.viaversion.viaversion.util.ChunkUtil;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import java.util.ArrayList;
import java.util.logging.Level;
public class ChunkType1_8 extends Type<Chunk> {
@ -62,7 +66,12 @@ public class ChunkType1_8 extends Type<Chunk> {
return new BaseChunk(chunkX, chunkZ, true, false, 0, new ChunkSection[16], null, new ArrayList<>());
}
return deserialize(chunkX, chunkZ, fullChunk, hasSkyLight, bitmask, data);
try {
return deserialize(chunkX, chunkZ, fullChunk, hasSkyLight, bitmask, data);
} catch (Throwable e) {
Via.getPlatform().getLogger().log(Level.WARNING, "The server sent an invalid chunk data packet, returning an empty chunk instead", e);
return ChunkUtil.createEmptyChunk(chunkX, chunkZ);
}
}
@Override

53
api/src/main/java/com/viaversion/viaversion/api/type/types/chunk/ChunkType1_9_1.java
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@ -22,15 +22,19 @@
*/
package com.viaversion.viaversion.api.type.types.chunk;
import com.viaversion.viaversion.api.Via;
import com.viaversion.viaversion.api.minecraft.Environment;
import com.viaversion.viaversion.api.minecraft.chunks.BaseChunk;
import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
import com.viaversion.viaversion.api.type.Type;
import com.viaversion.viaversion.api.type.types.version.Types1_9;
import com.viaversion.viaversion.util.ChunkUtil;
import io.netty.buffer.ByteBuf;
import java.util.ArrayList;
import java.util.BitSet;
import java.util.logging.Level;
public class ChunkType1_9_1 extends Type<Chunk> {
@ -56,31 +60,36 @@ public class ChunkType1_9_1 extends Type<Chunk> {
int primaryBitmask = Type.VAR_INT.readPrimitive(input);
ByteBuf data = input.readSlice(Type.VAR_INT.readPrimitive(input));
BitSet usedSections = new BitSet(16);
ChunkSection[] sections = new ChunkSection[16];
// Calculate section count from bitmask
for (int i = 0; i < 16; i++) {
if ((primaryBitmask & (1 << i)) != 0) {
usedSections.set(i);
}
}
// Read sections
for (int i = 0; i < 16; i++) {
if (!usedSections.get(i)) continue; // Section not set
ChunkSection section = Types1_9.CHUNK_SECTION.read(data);
sections[i] = section;
section.getLight().readBlockLight(data);
if (hasSkyLight) {
section.getLight().readSkyLight(data);
}
}
int[] biomeData = groundUp ? new int[256] : null;
if (groundUp) {
for (int i = 0; i < 256; i++) {
biomeData[i] = data.readByte() & 0xFF;
try {
BitSet usedSections = new BitSet(16);
// Calculate section count from bitmask
for (int i = 0; i < 16; i++) {
if ((primaryBitmask & (1 << i)) != 0) {
usedSections.set(i);
}
}
// Read sections
for (int i = 0; i < 16; i++) {
if (!usedSections.get(i)) continue; // Section not set
ChunkSection section = Types1_9.CHUNK_SECTION.read(data);
sections[i] = section;
section.getLight().readBlockLight(data);
if (hasSkyLight) {
section.getLight().readSkyLight(data);
}
}
if (groundUp) {
for (int i = 0; i < 256; i++) {
biomeData[i] = data.readByte() & 0xFF;
}
}
} catch (Throwable e) {
Via.getPlatform().getLogger().log(Level.WARNING, "The server sent an invalid chunk data packet, returning an empty chunk instead", e);
return ChunkUtil.createEmptyChunk(chunkX, chunkZ);
}
return new BaseChunk(chunkX, chunkZ, groundUp, false, primaryBitmask, sections, biomeData, new ArrayList<>());

40
api/src/main/java/com/viaversion/viaversion/api/type/types/chunk/ChunkType1_9_3.java
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@ -30,10 +30,13 @@ import com.viaversion.viaversion.api.minecraft.chunks.Chunk;
import com.viaversion.viaversion.api.minecraft.chunks.ChunkSection;
import com.viaversion.viaversion.api.type.Type;
import com.viaversion.viaversion.api.type.types.version.Types1_9;
import com.viaversion.viaversion.util.ChunkUtil;
import io.netty.buffer.ByteBuf;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Level;
public class ChunkType1_9_3 extends Type<Chunk> {
@ -59,24 +62,29 @@ public class ChunkType1_9_3 extends Type<Chunk> {
int primaryBitmask = Type.VAR_INT.readPrimitive(input);
ByteBuf data = input.readSlice(Type.VAR_INT.readPrimitive(input));
// Read sections
ChunkSection[] sections = new ChunkSection[16];
for (int i = 0; i < 16; i++) {
if ((primaryBitmask & (1 << i)) == 0) continue; // Section not set
ChunkSection section = Types1_9.CHUNK_SECTION.read(data);
sections[i] = section;
section.getLight().readBlockLight(data);
if (hasSkyLight) {
section.getLight().readSkyLight(data);
}
}
int[] biomeData = fullChunk ? new int[256] : null;
if (fullChunk) {
for (int i = 0; i < 256; i++) {
biomeData[i] = data.readByte() & 0xFF;
try {
// Read sections
for (int i = 0; i < 16; i++) {
if ((primaryBitmask & (1 << i)) == 0) continue; // Section not set
ChunkSection section = Types1_9.CHUNK_SECTION.read(data);
sections[i] = section;
section.getLight().readBlockLight(data);
if (hasSkyLight) {
section.getLight().readSkyLight(data);
}
}
if (fullChunk) {
for (int i = 0; i < 256; i++) {
biomeData[i] = data.readByte() & 0xFF;
}
}
} catch (Throwable e) {
Via.getPlatform().getLogger().log(Level.WARNING, "The server sent an invalid chunk data packet, returning an empty chunk instead", e);
return ChunkUtil.createEmptyChunk(chunkX, chunkZ);
}
List<CompoundTag> nbtData = new ArrayList<>(Arrays.asList(Type.NAMED_COMPOUND_TAG_ARRAY.read(input)));
@ -119,4 +127,4 @@ public class ChunkType1_9_3 extends Type<Chunk> {
// Write Block Entities
Type.NAMED_COMPOUND_TAG_ARRAY.write(output, chunk.getBlockEntities().toArray(new CompoundTag[0]));
}
}
}

40
api/src/main/java/com/viaversion/viaversion/util/ChunkUtil.java Normal file
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@ -0,0 +1,40 @@
/*
* This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
* Copyright (C) 2023 ViaVersion and contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.viaversion.viaversion.util;
import com.viaversion.viaversion.api.minecraft.chunks.*;
import java.util.ArrayList;
public class ChunkUtil {
public static Chunk createEmptyChunk(final int chunkX, final int chunkZ) {
final ChunkSection[] airSections = new ChunkSection[16];
for (int i = 0; i < airSections.length; i++) {
airSections[i] = new ChunkSectionImpl(true);
airSections[i].palette(PaletteType.BLOCKS).addId(0);
}
return new BaseChunk(chunkX, chunkZ, true, false, 0xFFFF, airSections, new int[256], new ArrayList<>());
}
}