131 lines
6.0 KiB
Diff
131 lines
6.0 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 7f4681910751047a26fdfc6b59bc460449c02001..35191d968fd30db16213540ef7121f4dede68e68 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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@@ -12,6 +12,7 @@ import io.netty.channel.epoll.EpollEventLoopGroup;
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import io.netty.channel.local.LocalChannel;
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import io.netty.channel.local.LocalServerChannel;
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import io.netty.channel.nio.NioEventLoopGroup;
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+import io.netty.handler.codec.EncoderException; // Paper
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import io.netty.handler.timeout.TimeoutException;
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import io.netty.util.AttributeKey;
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import io.netty.util.concurrent.Future;
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@@ -107,6 +108,15 @@ 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 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 d36d0424bcd4811af892f5f76fdcefda2af1ad33..a58c4fa8be7193b8acae5ea18a9780866312d768 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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@@ -53,7 +53,31 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
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throw throwable;
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}
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}
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+
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+ // Paper start
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+ int packetLength = bytebuf.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 29f10af7feabe2765f576586db4e3dba320dceda..9914a82ba0ec146ab13fe94c4dbf0ebf64926536 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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@@ -12,6 +12,12 @@ 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(NetworkManager 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 70684318c562a9c3ce566b16cd0e68cfe95cbd50..64a15dcaef40c4e16458ab71d648f9fff169a3b2 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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@@ -4,6 +4,7 @@ import java.io.IOException;
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import java.util.Iterator;
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import java.util.List;
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import net.minecraft.core.NonNullList;
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+import net.minecraft.network.Connection;
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import net.minecraft.network.FriendlyByteBuf;
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import net.minecraft.network.protocol.Packet;
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import net.minecraft.world.item.ItemStack;
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@@ -13,6 +14,15 @@ public class ClientboundContainerSetContentPacket implements Packet<ClientGamePa
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private int containerId;
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private List<ItemStack> items;
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+ //Paper start
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+ @Override
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+ public boolean packetTooLarge(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, 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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public ClientboundContainerSetContentPacket() {}
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public ClientboundContainerSetContentPacket(int syncId, NonNullList<ItemStack> contents) {
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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 4fe15aa331ca18319ca46d1b426f0d6fd24341f0..b7d303b5f51a35504888933efef74564fa01e59d 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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@@ -91,7 +91,7 @@ public class ClientboundLevelChunkPacket implements Packet<ClientGamePacketListe
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int i = buf.readVarInt();
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- if (i > 2097152) {
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+ if (i > 2097152) { // Paper - 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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