123 lines
5.4 KiB
Diff
123 lines
5.4 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/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
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index 2916119507ec5ecd9266569b0003d0504a79f6c4..e7b4c7f2d7b0eed4c145f6476f35b637d861551e 100644
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--- a/src/main/java/net/minecraft/server/NetworkManager.java
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+++ b/src/main/java/net/minecraft/server/NetworkManager.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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@@ -97,6 +98,15 @@ public class NetworkManager 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 SkipEncodeException) {
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NetworkManager.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/server/Packet.java b/src/main/java/net/minecraft/server/Packet.java
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index 601d4d0fa2a0b3e90f81aed55a2d3473c66c7875..2d8e6a2f4a0c3c5d74a647d7164b0028781d3bf5 100644
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--- a/src/main/java/net/minecraft/server/Packet.java
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+++ b/src/main/java/net/minecraft/server/Packet.java
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@@ -10,6 +10,12 @@ public interface Packet<T extends PacketListener> {
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void a(T t0);
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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 a() {
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return false;
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}
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diff --git a/src/main/java/net/minecraft/server/PacketEncoder.java b/src/main/java/net/minecraft/server/PacketEncoder.java
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index 63c4dbd327beb7b6ab42eb44650d68accd3b0de6..b0cfef52cbb5e23beae528668e4e98cedecf603c 100644
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--- a/src/main/java/net/minecraft/server/PacketEncoder.java
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+++ b/src/main/java/net/minecraft/server/PacketEncoder.java
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@@ -49,7 +49,31 @@ 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/server/PacketPlayOutMapChunk.java b/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java
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index 72ff0a1e6428a1776f49c26e1715f5f2428ba242..6e1426127fc5b5ddc205603b8d03b98a046f9741 100644
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--- a/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java
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+++ b/src/main/java/net/minecraft/server/PacketPlayOutMapChunk.java
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@@ -82,7 +82,7 @@ public class PacketPlayOutMapChunk implements Packet<PacketListenerPlayOut> {
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int i = packetdataserializer.i();
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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.f = new byte[i];
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diff --git a/src/main/java/net/minecraft/server/PacketPlayOutWindowItems.java b/src/main/java/net/minecraft/server/PacketPlayOutWindowItems.java
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index ac42c913246f1aa9425fdf6eca48adf29e917c90..901a5df3f7d3f9ee60485ec1044a05e8aff89ccb 100644
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--- a/src/main/java/net/minecraft/server/PacketPlayOutWindowItems.java
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+++ b/src/main/java/net/minecraft/server/PacketPlayOutWindowItems.java
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@@ -9,6 +9,15 @@ public class PacketPlayOutWindowItems implements Packet<PacketListenerPlayOut> {
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private int a;
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private List<ItemStack> b;
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+ //Paper start
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+ @Override
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+ public boolean packetTooLarge(NetworkManager manager) {
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+ for (int i = 0 ; i < this.b.size() ; i++) {
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+ manager.sendPacket(new PacketPlayOutSetSlot(this.a, i, this.b.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 PacketPlayOutWindowItems() {}
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public PacketPlayOutWindowItems(int i, NonNullList<ItemStack> nonnulllist) {
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