136 Zeilen
6.7 KiB
Diff
136 Zeilen
6.7 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 7fb162fa031fd76aa9a94f5fdaa3e32ceb9b9abc..58d28b6c1cc7da7d786f78308db971f7502ad844 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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@@ -180,6 +180,21 @@ 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 - Handle large packets disconnecting client
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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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+ if (packet.packetTooLarge(this)) {
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+ ProtocolSwapHandler.handleOutboundTerminalPacket(channelhandlercontext, 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.handleOutboundTerminalPacket(channelhandlercontext, 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 - Handle large packets disconnecting client
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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 046bfc212b640de174b300e7a05cc30bb3cac93e..af3ec112e142a2c91c46882dad6180b18f39eec2 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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@@ -40,7 +40,33 @@ public class PacketEncoder<T extends PacketListener> extends MessageToByteEncode
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throw var9;
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} finally {
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+ // Paper start - Handle large packets disconnecting client
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+ int packetLength = byteBuf.readableBytes();
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+ if (packetLength > MAX_PACKET_SIZE || (packetLength > MAX_FINAL_PACKET_SIZE && packet.hasLargePacketFallback())) {
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+ throw new PacketTooLargeException(packet, packetLength);
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+ }
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+ // Paper end - Handle large packets disconnecting client
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ProtocolSwapHandler.handleOutboundTerminalPacket(channelHandlerContext, packet);
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}
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}
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+
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+ // Paper start
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+ // packet size is encoded into 3-byte varint
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+ private static final int MAX_FINAL_PACKET_SIZE = (1 << 21) - 1;
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+ // Vanilla Max size for the encoder (before compression)
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+ private static final 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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+
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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 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 5ee2ba1225fb7e4f02152b45adeb66f79ed1650d..c9d283b7fc9ede79dc6cbc39dfc9e7ae986a6a47 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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@@ -11,6 +11,19 @@ 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 hasLargePacketFallback() {
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+ return false;
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+ }
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+
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+ /**
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+ * override {@link #hasLargePacketFallback()} to return true when overriding in subclasses
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+ */
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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 7e555ece0555b3d2a983ab2c39c5e7ec23fc7e88..8cca2ac616a2c80268c96b9f95e33f834a0fc8fd 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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@@ -36,6 +36,21 @@ public class ClientboundContainerSetContentPacket implements Packet<ClientGamePa
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this.carriedItem = ItemStack.OPTIONAL_STREAM_CODEC.decode(buf);
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}
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+ // Paper start - Handle large packets disconnecting client
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+ @Override
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+ public boolean hasLargePacketFallback() {
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+ return true;
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+ }
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+
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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 - Handle large packets disconnecting client
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+
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private void write(RegistryFriendlyByteBuf buf) {
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buf.writeByte(this.containerId);
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buf.writeVarInt(this.stateId);
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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 2501fbaf497d226051800c53d60a39bbc80db91c..0a8d07bf68b0ceabd13c70196d357fce79dcc2c3 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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@@ -80,7 +80,7 @@ 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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