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Improve chunkban patch (#77)

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Luna 2023-04-08 16:10:07 -03:00 committed by GitHub
parent 9342bc1cbc
commit 205e742c56
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1 changed files with 100 additions and 89 deletions
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patches/server/0029-Block-server-side-chunkbans.patch
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@ -5,75 +5,110 @@ Subject: [PATCH] Block server side chunkbans
diff --git a/src/main/java/net/minecraft/network/PacketEncoder.java b/src/main/java/net/minecraft/network/PacketEncoder.java
index ebee957fb048da6ffcd2a5ba2ed989ed1a6634e9..b640c8e0e1f131299424c1f1ebe51a0591bbe1fd 100644
index ebee957fb048da6ffcd2a5ba2ed989ed1a6634e9..889342fac2903f16846e9303631a64df6fcfc589 100644
--- a/src/main/java/net/minecraft/network/PacketEncoder.java
+++ b/src/main/java/net/minecraft/network/PacketEncoder.java
@@ -6,9 +6,18 @@ import io.netty.channel.ChannelHandlerContext;
@@ -6,9 +6,26 @@ import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;
import io.papermc.paper.adventure.PaperAdventure; // Paper
import java.io.IOException;
+import java.util.Collections;
+import net.minecraft.ChatFormatting;
+import net.minecraft.core.NonNullList;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.network.chat.Component;
+import net.minecraft.network.chat.SignedMessageBody;
import net.minecraft.network.protocol.Packet;
import net.minecraft.network.protocol.PacketFlow;
+import net.minecraft.network.protocol.game.ClientboundBlockEntityDataPacket;
+import net.minecraft.network.protocol.game.ClientboundContainerSetContentPacket;
+import net.minecraft.network.protocol.game.ClientboundContainerSetSlotPacket;
+import net.minecraft.network.protocol.game.ClientboundDisguisedChatPacket;
+import net.minecraft.network.protocol.game.ClientboundLevelChunkPacketData;
+import net.minecraft.network.protocol.game.ClientboundMapItemDataPacket;
+import net.minecraft.network.protocol.game.ClientboundPlayerChatPacket;
+import net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket;
+import net.minecraft.network.protocol.game.ClientboundSetEquipmentPacket;
+import net.minecraft.network.protocol.game.ClientboundSystemChatPacket;
import net.minecraft.util.profiling.jfr.JvmProfiler;
+import net.minecraft.world.item.ItemStack;
import org.slf4j.Logger;
public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
@@ -41,30 +50,101 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
packet.write(friendlyByteBuf);
int k = friendlyByteBuf.writerIndex() - j;
if (k > 8388608) {
- throw new IllegalArgumentException("Packet too big (is " + k + ", should be less than 8388608): " + packet);
+ // Scissors start
+ noKicking(friendlyByteBuf, packet, i, channelHandlerContext);
+ // Scissors end
} else {
int l = channelHandlerContext.channel().attr(Connection.ATTRIBUTE_PROTOCOL).get().getId();
JvmProfiler.INSTANCE.onPacketSent(l, i, channelHandlerContext.channel().remoteAddress(), k);
@@ -19,6 +36,23 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
this.flow = side;
}
+ // Scissors start
+ private static int tryWrite(Packet packet, FriendlyByteBuf friendlyByteBuf, ChannelHandlerContext channelHandlerContext, int i) {
+ friendlyByteBuf.writeVarInt(i);
+ friendlyByteBuf.adventure$locale = channelHandlerContext.channel().attr(PaperAdventure.LOCALE_ATTRIBUTE).get();
+
+ int j = friendlyByteBuf.writerIndex();
+ packet.write(friendlyByteBuf);
+ int k = friendlyByteBuf.writerIndex() - j;
+ int packetLength = friendlyByteBuf.readableBytes();
+ if (k > 8388608 || packetLength > MAX_PACKET_SIZE) {
+ throw new SkipPacketException(new IllegalArgumentException("Packet too big (is " + k + "): " + packet));
+ }
+
+ return k;
+ }
+ // Scissors end
+
protected void encode(ChannelHandlerContext channelHandlerContext, Packet<?> packet, ByteBuf byteBuf) throws Exception {
ConnectionProtocol connectionProtocol = channelHandlerContext.channel().attr(Connection.ATTRIBUTE_PROTOCOL).get();
if (connectionProtocol == null) {
@@ -33,38 +67,87 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
throw new IOException("Can't serialize unregistered packet");
} else {
FriendlyByteBuf friendlyByteBuf = new FriendlyByteBuf(byteBuf);
- friendlyByteBuf.writeVarInt(i);
- friendlyByteBuf.adventure$locale = channelHandlerContext.channel().attr(PaperAdventure.LOCALE_ATTRIBUTE).get(); // Paper
-
+ // Scissors start
+ int k;
try {
- int j = friendlyByteBuf.writerIndex();
- packet.write(friendlyByteBuf);
- int k = friendlyByteBuf.writerIndex() - j;
- if (k > 8388608) {
- throw new IllegalArgumentException("Packet too big (is " + k + ", should be less than 8388608): " + packet);
- } else {
- int l = channelHandlerContext.channel().attr(Connection.ATTRIBUTE_PROTOCOL).get().getId();
- JvmProfiler.INSTANCE.onPacketSent(l, i, channelHandlerContext.channel().remoteAddress(), k);
- }
+ k = tryWrite(packet, friendlyByteBuf, channelHandlerContext, i);
} catch (Throwable var10) {
- LOGGER.error("Packet encoding of packet ID {} threw (skippable? {})", i, packet.isSkippable(), var10); // Paper - Give proper error message
- if (packet.isSkippable()) {
- throw new SkipPacketException(var10);
- } else {
- throw var10;
- }
+ noKicking(friendlyByteBuf, packet, i, channelHandlerContext);
+ packet = capPacket(packet, i);
+ if (packet == null) {
+ throw new SkipPacketException(new IllegalArgumentException("Packet too big: " + packet));
}
+ friendlyByteBuf.clear();
+ k = tryWrite(packet, friendlyByteBuf, channelHandlerContext, i);
}
// Paper start
int packetLength = friendlyByteBuf.readableBytes();
if (packetLength > MAX_PACKET_SIZE) {
- // Paper start
- int packetLength = friendlyByteBuf.readableBytes();
- if (packetLength > MAX_PACKET_SIZE) {
- throw new PacketTooLargeException(packet, packetLength);
+ // Scissors start
+ friendlyByteBuf.clear();
+ noKicking(friendlyByteBuf, packet, i, channelHandlerContext);
+ packetLength = friendlyByteBuf.readableBytes();
+ if (packetLength > MAX_PACKET_SIZE) {
+ friendlyByteBuf.clear();
+ }
- }
- // Paper end
+ int l = channelHandlerContext.channel().attr(Connection.ATTRIBUTE_PROTOCOL).get().getId();
+ JvmProfiler.INSTANCE.onPacketSent(l, i, channelHandlerContext.channel().remoteAddress(), k);
+ // Scissors end
}
// Paper end
}
}
}
+ // Scissors start
+ private static void noKicking(FriendlyByteBuf friendlyByteBuf, Packet packet, Integer integer, ChannelHandlerContext channelHandlerContext)
+ private static Packet capPacket(Packet packet, int i)
+ {
+ friendlyByteBuf.clear();
+ friendlyByteBuf.writeVarInt(integer);
+ friendlyByteBuf.adventure$locale = channelHandlerContext.channel().attr(PaperAdventure.LOCALE_ATTRIBUTE).get(); // Paper
+ boolean didIt = true;
+ if (packet instanceof ClientboundBlockEntityDataPacket blockEntityDataPacket)
+ {
+ packet = new ClientboundBlockEntityDataPacket(blockEntityDataPacket.getPos(), blockEntityDataPacket.getType(), new CompoundTag());
@ -82,55 +117,53 @@ index ebee957fb048da6ffcd2a5ba2ed989ed1a6634e9..b640c8e0e1f131299424c1f1ebe51a05
+ {
+ chunkPacket.clearNBT();
+ }
+ else if (packet instanceof ClientboundSetEntityDataPacket entityDataPacket)
+ else if (packet instanceof ClientboundSetEntityDataPacket)
+ {
+ friendlyByteBuf.writeVarInt(entityDataPacket.id());
+ friendlyByteBuf.writeByte(255);
+ didIt = false;//prevent default packet writing
+ return null; // Skip
+ }
+ else if (packet instanceof ClientboundContainerSetContentPacket containerSetContentPacket)
+ {
+ containerSetContentPacket.clearNBT();
+ packet = new ClientboundContainerSetContentPacket(containerSetContentPacket.getContainerId(), containerSetContentPacket.getStateId(), NonNullList.create(), ItemStack.EMPTY);
+ }
+ else if (packet instanceof ClientboundSetEquipmentPacket setEquipmentPacket)
+ {
+ friendlyByteBuf.writeVarInt(setEquipmentPacket.getEntity());
+ didIt = false; //prevent default
+ packet = new ClientboundSetEquipmentPacket(setEquipmentPacket.getEntity(), Collections.emptyList());
+ }
+ else if (packet instanceof ClientboundContainerSetSlotPacket containerSetSlotPacket)
+ {
+ friendlyByteBuf.writeByte(containerSetSlotPacket.getContainerId());
+ friendlyByteBuf.writeVarInt(containerSetSlotPacket.getStateId());
+ friendlyByteBuf.writeShort(containerSetSlotPacket.getSlot());
+ friendlyByteBuf.writeItem(ItemStack.EMPTY);
+ didIt = false; //prevent default
+ packet = new ClientboundContainerSetSlotPacket(containerSetSlotPacket.getContainerId(), containerSetSlotPacket.getStateId(), containerSetSlotPacket.getSlot(), ItemStack.EMPTY);
+ }
+ else if (packet instanceof ClientboundMapItemDataPacket mapItemDataPacket)
+ {
+ packet = new ClientboundMapItemDataPacket(mapItemDataPacket.getMapId(), mapItemDataPacket.getScale(), mapItemDataPacket.isLocked(), null, null);
+ }
+ else if (packet instanceof ClientboundSystemChatPacket)
+ {
+ return null;
+ }
+ else if (packet instanceof ClientboundDisguisedChatPacket)
+ {
+ return null;
+ }
+ else if (packet instanceof ClientboundPlayerChatPacket playerChatPacket)
+ {
+ final SignedMessageBody.Packed body = playerChatPacket.body();
+ packet = new ClientboundPlayerChatPacket(playerChatPacket.sender(), // Not sending this packet results in a kick when someone says something.
+ playerChatPacket.index(),
+ playerChatPacket.signature(),
+ playerChatPacket.body(),
+ Component.empty().append("** Message too large **").withStyle(ChatFormatting.RED),
+ playerChatPacket.filterMask(),
+ playerChatPacket.chatType()
+ );
+ }
+ else
+ {
+ didIt = false;
+ LOGGER.info(packet.getClass().getName() + " overflowed/errored and was not caught!!");
+ }
+ if (didIt)
+ {
+ try
+ {
+ int i = friendlyByteBuf.writerIndex();
+ packet.write(friendlyByteBuf);
+ int j = friendlyByteBuf.writerIndex() - i;
+ if (j > 8388608)
+ {
+ friendlyByteBuf.clear();
+ }
+ }
+ catch (Throwable var69)
+ {
+ friendlyByteBuf.clear();
+ }
+ LOGGER.error("Packet with ID {} was too large and was not caught. Please report this to the Scissors developers.", i);
+ return null;
+ }
+
+ return packet;
+ }
+ // Scissors end
+
@ -138,40 +171,18 @@ index ebee957fb048da6ffcd2a5ba2ed989ed1a6634e9..b640c8e0e1f131299424c1f1ebe51a05
private static int MAX_PACKET_SIZE = 2097152;
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java
index 3944852921335c78a04a9dc301882ab5b152b1ed..0d88828bc0bbd68328da4d0e7d3b880006d2c775 100644
index 3944852921335c78a04a9dc301882ab5b152b1ed..96ee53c7cc862e059328c5cdf5e07f309df6a79e 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundBlockEntityDataPacket.java
@@ -24,7 +24,8 @@ public class ClientboundBlockEntityDataPacket implements Packet<ClientGamePacket
@@ -24,7 +24,7 @@ public class ClientboundBlockEntityDataPacket implements Packet<ClientGamePacket
return create(blockEntity, BlockEntity::getUpdateTag);
}
- private ClientboundBlockEntityDataPacket(BlockPos pos, BlockEntityType<?> blockEntityType, CompoundTag nbt) {
+ // Scissors - make this public
+ public ClientboundBlockEntityDataPacket(BlockPos pos, BlockEntityType<?> blockEntityType, CompoundTag nbt) {
+ public ClientboundBlockEntityDataPacket(BlockPos pos, BlockEntityType<?> blockEntityType, CompoundTag nbt) { // Scissors - private -> public
this.pos = pos;
this.type = blockEntityType;
this.tag = nbt.isEmpty() ? null : nbt;
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
index dbd8b9b09b82c1b75e8be9dc7416d9f0863c8c87..24e0f4ee1dc9b5a46ed063e087d4b7bcd2a7fe46 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
@@ -10,7 +10,15 @@ public class ClientboundContainerSetContentPacket implements Packet<ClientGamePa
private final int containerId;
private final int stateId;
private final List<ItemStack> items;
- private final ItemStack carriedItem;
+ private ItemStack carriedItem; // Scissors - removed "final"
+
+ // Scissors start
+ public void clearNBT()
+ {
+ this.items.clear();
+ this.carriedItem = ItemStack.EMPTY;
+ }
+ // Scissors end
public ClientboundContainerSetContentPacket(int syncId, int revision, NonNullList<ItemStack> contents, ItemStack cursorStack) {
this.containerId = syncId;
diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
index f3fa2678796c33f3a408a02a1995ad117eac9169..c8dd976240aa4f640bb2d223d472f81fdd8dcf7c 100644
--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java