116 lines
5.5 KiB
Diff
116 lines
5.5 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: Tue, 27 Nov 2018 21:18:06 -0500
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Subject: [PATCH] Handle Large Packets disconnecting client
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If a players inventory is too big to send in a single packet,
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split the inventory set into multiple packets instead.
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diff --git a/src/main/java/net/minecraft/network/Connection.java b/src/main/java/net/minecraft/network/Connection.java
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index 636ac646bec67dbd933f00614693af03481b6173..3b943894750022aa84de8af97db3eebf71db1afa 100644
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--- a/src/main/java/net/minecraft/network/Connection.java
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+++ b/src/main/java/net/minecraft/network/Connection.java
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@@ -120,6 +120,15 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
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}
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public void exceptionCaught(ChannelHandlerContext channelhandlercontext, Throwable throwable) {
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+ // Paper start
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+ if (throwable instanceof io.netty.handler.codec.EncoderException && throwable.getCause() instanceof PacketEncoder.PacketTooLargeException) {
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+ if (((PacketEncoder.PacketTooLargeException) throwable.getCause()).getPacket().packetTooLarge(this)) {
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+ return;
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+ } else {
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+ throwable = throwable.getCause();
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+ }
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+ }
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+ // Paper end
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if (throwable instanceof SkipPacketException) {
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Connection.LOGGER.debug("Skipping packet due to errors", throwable.getCause());
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} else {
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diff --git a/src/main/java/net/minecraft/network/PacketEncoder.java b/src/main/java/net/minecraft/network/PacketEncoder.java
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index 092d8ecf8d6a7045d2fc379bc0f9ec4ee294d056..b039a32b805fc02033fa862a1c40c4a51639e69a 100644
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--- a/src/main/java/net/minecraft/network/PacketEncoder.java
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+++ b/src/main/java/net/minecraft/network/PacketEncoder.java
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@@ -54,7 +54,31 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
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throw var9;
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}
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}
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+
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+ // Paper start
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+ int packetLength = friendlyByteBuf.readableBytes();
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+ if (packetLength > MAX_PACKET_SIZE) {
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+ throw new PacketTooLargeException(packet, packetLength);
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+ }
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+ // Paper end
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}
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}
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}
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+
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+ // Paper start
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+ private static int MAX_PACKET_SIZE = 2097152;
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+
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+ public static class PacketTooLargeException extends RuntimeException {
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+ private final Packet<?> packet;
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+
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+ PacketTooLargeException(Packet<?> packet, int packetLength) {
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+ super("PacketTooLarge - " + packet.getClass().getSimpleName() + " is " + packetLength + ". Max is " + MAX_PACKET_SIZE);
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+ this.packet = packet;
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+ }
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+
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+ public Packet<?> getPacket() {
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+ return packet;
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+ }
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+ }
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+ // Paper end
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}
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diff --git a/src/main/java/net/minecraft/network/protocol/Packet.java b/src/main/java/net/minecraft/network/protocol/Packet.java
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index 10c1f2d8a92f848c3f2be9d1d06fd254978e6dcc..74bfe0d3942259c45702b099efdc4e101a4e3022 100644
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--- a/src/main/java/net/minecraft/network/protocol/Packet.java
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+++ b/src/main/java/net/minecraft/network/protocol/Packet.java
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@@ -8,6 +8,12 @@ public interface Packet<T extends PacketListener> {
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void handle(T listener);
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+ // Paper start
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+ default boolean packetTooLarge(net.minecraft.network.Connection manager) {
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+ return false;
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+ }
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+ // Paper end
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+
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default boolean isSkippable() {
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return false;
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}
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diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
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index 0e076173033278587df2b5dfbd01cc9005651eb5..a8a1ecfa349d4cb8daa1d426920988c64b392b14 100644
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--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
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+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundContainerSetContentPacket.java
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@@ -31,6 +31,16 @@ public class ClientboundContainerSetContentPacket implements Packet<ClientGamePa
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this.carriedItem = buf.readItem();
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}
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+ //Paper start
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+ @Override
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+ public boolean packetTooLarge(net.minecraft.network.Connection manager) {
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+ for (int i = 0 ; i < this.items.size() ; i++) {
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+ manager.send(new ClientboundContainerSetSlotPacket(this.containerId, this.stateId, i, this.items.get(i)));
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+ }
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+ return true;
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+ }
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+ // Paper end
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+
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@Override
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public void write(FriendlyByteBuf buf) {
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buf.writeByte(this.containerId);
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diff --git a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java
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index 1451a98d69b185dd15a2d1d7681bcecb6a4f99c1..96626835fee3c0fdb452acacdc9f737ad90c08de 100644
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--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java
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+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacket.java
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@@ -64,7 +64,7 @@ public class ClientboundLevelChunkPacket implements Packet<ClientGamePacketListe
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} else {
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this.biomes = buf.readVarIntArray(ChunkBiomeContainer.MAX_SIZE);
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int i = buf.readVarInt();
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- if (i > 2097152) {
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+ if (i > 2097152) { // Paper - diff on change - if this changes, update PacketEncoder
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throw new RuntimeException("Chunk Packet trying to allocate too much memory on read.");
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} else {
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this.buffer = new byte[i];
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