136 Zeilen
6.8 KiB
Diff
136 Zeilen
6.8 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 df5da9398c903d073485aaa0dce8e70947137cb9..6fcbf8205e1852d5193a42bfe1154f62ab01e7ad 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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@@ -156,6 +156,22 @@ 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 packetTooLargeException) {
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+ final Packet<?> packet = packetTooLargeException.getPacket();
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+ final io.netty.util.Attribute<ConnectionProtocol.CodecData<?>> codecDataAttribute = channelhandlercontext.channel().attr(packetTooLargeException.codecKey);
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+ if (packet.packetTooLarge(this)) {
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+ ProtocolSwapHandler.swapProtocolIfNeeded(codecDataAttribute, packet);
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+ return;
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+ } else if (packet.isSkippable()) {
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+ Connection.LOGGER.debug("Skipping packet due to errors", throwable.getCause());
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+ ProtocolSwapHandler.swapProtocolIfNeeded(codecDataAttribute, packet);
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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 3d359f80f52bff6f19fcb484f491a874f9dcff27..45b4f1c295eda2fcc5067a4b21de247218ef117f 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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@@ -41,7 +41,7 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
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int j = friendlyByteBuf.writerIndex();
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packet.write(friendlyByteBuf);
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int k = friendlyByteBuf.writerIndex() - j;
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- if (k > 8388608) {
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+ if (false && k > 8388608) { // Paper - disable
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throw new IllegalArgumentException("Packet too big (is " + k + ", should be less than 8388608): " + packet);
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}
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@@ -54,10 +54,35 @@ public class PacketEncoder extends MessageToByteEncoder<Packet<?>> {
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throw var13;
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} finally {
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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, this.codecKey, packetLength);
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+ }
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+ // Paper end
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ProtocolSwapHandler.swapProtocolIfNeeded(attribute, packet);
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}
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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 = 8388608;
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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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+ public final AttributeKey<ConnectionProtocol.CodecData<?>> codecKey;
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+
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+ PacketTooLargeException(Packet<?> packet, AttributeKey<ConnectionProtocol.CodecData<?>> codecKey, 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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+ this.codecKey = codecKey;
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+ }
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+
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+ public Packet<?> getPacket() {
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+ return this.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 700418bb0c9fbed3f161611881b1e222248ca4eb..cc658a61065d5c0021a4b88fa58b40211b94f8ec 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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@@ -10,6 +10,12 @@ 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..dbd8b9b09b82c1b75e8be9dc7416d9f0863c8c87 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/ClientboundLevelChunkPacketData.java b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
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index 932cca4d957c1fc212b7a514ea23e8dc7ab5b9d9..f47eeb70661661610ef1a96dd9da67785825c126 100644
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--- a/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
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+++ b/src/main/java/net/minecraft/network/protocol/game/ClientboundLevelChunkPacketData.java
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@@ -50,7 +50,7 @@ public class ClientboundLevelChunkPacketData {
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throw new RuntimeException("Can't read heightmap in packet for [" + x + ", " + z + "]");
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} else {
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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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