72 lines
3.8 KiB
Diff
72 lines
3.8 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Andrew Steinborn <git@steinborn.me>
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Date: Sun, 5 Jul 2020 22:38:18 -0400
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Subject: [PATCH] Optimize NetworkManager Exception Handling
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diff --git a/src/main/java/net/minecraft/server/EnumProtocol.java b/src/main/java/net/minecraft/server/EnumProtocol.java
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index d384b1e857a5fe21a93e6fb956a2bfd777d92de3..ec3c8ec6a7c0a835d0bab9872d0ead68b2ff54df 100644
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--- a/src/main/java/net/minecraft/server/EnumProtocol.java
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+++ b/src/main/java/net/minecraft/server/EnumProtocol.java
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@@ -128,6 +128,7 @@ public enum EnumProtocol {
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@Nullable
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public Packet<?> a(int i) {
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+ if (i < 0 || i >= this.b.size()) return null; // Paper
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Supplier<? extends Packet<T>> supplier = (Supplier) this.b.get(i);
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return supplier != null ? (Packet) supplier.get() : null;
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diff --git a/src/main/java/net/minecraft/server/PacketSplitter.java b/src/main/java/net/minecraft/server/PacketSplitter.java
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index cdaa8be90d16b0e9e2f92a3e2ed120b856feab54..2aaa8770edfd8acc6861c23176e405863858b275 100644
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--- a/src/main/java/net/minecraft/server/PacketSplitter.java
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+++ b/src/main/java/net/minecraft/server/PacketSplitter.java
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@@ -9,11 +9,21 @@ import java.util.List;
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public class PacketSplitter extends ByteToMessageDecoder {
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+ private final byte[] lenBuf = new byte[3]; // Paper
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public PacketSplitter() {}
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protected void decode(ChannelHandlerContext channelhandlercontext, ByteBuf bytebuf, List<Object> list) throws Exception {
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+ // Paper start - if channel is not active just discard the packet
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+ if (!channelhandlercontext.channel().isActive()) {
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+ bytebuf.skipBytes(bytebuf.readableBytes());
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+ return;
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+ }
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+ // Paper end
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bytebuf.markReaderIndex();
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- byte[] abyte = new byte[3];
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+ // Paper start - reuse temporary length buffer
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+ byte[] abyte = lenBuf;
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+ java.util.Arrays.fill(abyte, (byte) 0);
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+ // Paper end
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for (int i = 0; i < abyte.length; ++i) {
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if (!bytebuf.isReadable()) {
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diff --git a/src/main/java/net/minecraft/server/PlayerConnectionUtils.java b/src/main/java/net/minecraft/server/PlayerConnectionUtils.java
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index eb3269e0ea3ce33d08e9eee3bca7cf434921e991..7ea293f38dedd6066601d94adbe175a31c502e1f 100644
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--- a/src/main/java/net/minecraft/server/PlayerConnectionUtils.java
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+++ b/src/main/java/net/minecraft/server/PlayerConnectionUtils.java
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@@ -22,6 +22,21 @@ public class PlayerConnectionUtils {
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try (Timing ignored = timing.startTiming()) { // Paper - timings
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packet.a(t0);
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} // Paper - timings
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+ // Paper start
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+ catch (Exception e) {
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+ NetworkManager networkmanager = t0.a();
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+ if (networkmanager.getPlayer() != null) {
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+ LOGGER.error("Error whilst processing packet {} for {}[{}]", packet, networkmanager.getPlayer().getName(), networkmanager.getSocketAddress(), e);
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+ } else {
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+ LOGGER.error("Error whilst processing packet {} for connection from {}", packet, networkmanager.getSocketAddress(), e);
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+ }
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+ ChatComponentText error = new ChatComponentText("Packet processing error");
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+ networkmanager.sendPacket(new PacketPlayOutKickDisconnect(error), (future) -> {
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+ networkmanager.close(error);
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+ });
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+ networkmanager.stopReading();
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+ }
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+ // Paper end
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} else {
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PlayerConnectionUtils.LOGGER.debug("Ignoring packet due to disconnection: " + packet);
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}
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