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958ae29cab
Waterfall/BungeeCord-Patches/0050-Speed-up-some-common-exceptions.patch
Noah van der Aa 958ae29cab
Updated Upstream (BungeeCord) (#741)
2022-06-07 18:12:20 +01:00

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From 9ef43c2b8ed992ad9637f1fae53685c0d728a6e1 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Mon, 25 Nov 2019 19:54:06 +0000
Subject: [PATCH] Speed up some common exceptions
diff --git a/api/src/main/java/io/github/waterfallmc/waterfall/utils/FastException.java b/api/src/main/java/io/github/waterfallmc/waterfall/utils/FastException.java
new file mode 100644
index 00000000..11e103cb
--- /dev/null
+++ b/api/src/main/java/io/github/waterfallmc/waterfall/utils/FastException.java
@@ -0,0 +1,19 @@
+package io.github.waterfallmc.waterfall.utils;
+
+// This is basically a copy of QuietException
+public class FastException extends RuntimeException {
+
+ public FastException(String message) {
+ super(message);
+ }
+
+ @Override
+ public synchronized Throwable initCause(Throwable cause) {
+ return this;
+ }
+
+ @Override
+ public synchronized Throwable fillInStackTrace() {
+ return this;
+ }
+}
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/BadPacketException.java b/protocol/src/main/java/net/md_5/bungee/protocol/BadPacketException.java
index 6c0ef4df..f20104a2 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/BadPacketException.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/BadPacketException.java
@@ -2,6 +2,7 @@ package net.md_5.bungee.protocol;
public class BadPacketException extends RuntimeException
{
+ private static final boolean PROCESS_TRACES = Boolean.getBoolean("waterfall.bad-packet-traces");
public BadPacketException(String message)
{
@@ -12,4 +13,24 @@ public class BadPacketException extends RuntimeException
{
super( message, cause );
}
+
+ // Waterfall start
+ @Override
+ public Throwable initCause(Throwable cause)
+ {
+ if (PROCESS_TRACES) {
+ return super.initCause(cause);
+ }
+ return this;
+ }
+
+ @Override
+ public Throwable fillInStackTrace()
+ {
+ if (PROCESS_TRACES) {
+ return super.fillInStackTrace();
+ }
+ return this;
+ }
+ // Waterfall end
}
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/DefinedPacket.java b/protocol/src/main/java/net/md_5/bungee/protocol/DefinedPacket.java
index 9d7d4b9a..18e548df 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/DefinedPacket.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/DefinedPacket.java
@@ -19,6 +19,9 @@ import se.llbit.nbt.Tag;
public abstract class DefinedPacket
{
+ private static final boolean PROCESS_TRACES = Boolean.getBoolean("waterfall.bad-packet-traces");
+ private static final BadPacketException OVERSIZED_VAR_INT_EXCEPTION = new BadPacketException( "VarInt too big" );
+ private static final BadPacketException NO_MORE_BYTES_EXCEPTION = new BadPacketException("No more bytes reading varint");
public static void writeString(String s, ByteBuf buf)
{
if ( s.length() > Short.MAX_VALUE )
@@ -150,13 +153,18 @@ public abstract class DefinedPacket
byte in;
while ( true )
{
+ // Waterfall start
+ if (input.readableBytes() == 0) {
+ throw PROCESS_TRACES ? new BadPacketException("No more bytes reading varint") : NO_MORE_BYTES_EXCEPTION;
+ }
+ // Waterfall end
in = input.readByte();
out |= ( in & 0x7F ) << ( bytes++ * 7 );
if ( bytes > maxBytes )
{
- throw new RuntimeException( "VarInt too big" );
+ throw PROCESS_TRACES ? new BadPacketException( "VarInt too big" ) : OVERSIZED_VAR_INT_EXCEPTION;
}
if ( ( in & 0x80 ) != 0x80 )
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/FastDecoderException.java b/protocol/src/main/java/net/md_5/bungee/protocol/FastDecoderException.java
new file mode 100644
index 00000000..2583aa2c
--- /dev/null
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/FastDecoderException.java
@@ -0,0 +1,26 @@
+package net.md_5.bungee.protocol;
+
+import io.netty.handler.codec.DecoderException;
+
+public class FastDecoderException extends DecoderException {
+
+ public FastDecoderException(String message, Throwable cause) {
+ super(message, cause);
+ }
+
+ public FastDecoderException(String message) {
+ super(message);
+ }
+
+ @Override
+ public Throwable initCause(Throwable cause)
+ {
+ return this;
+ }
+
+ @Override
+ public Throwable fillInStackTrace()
+ {
+ return this;
+ }
+}
diff --git a/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java b/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java
index b68b33a9..f5e414c1 100644
--- a/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java
+++ b/protocol/src/main/java/net/md_5/bungee/protocol/MinecraftDecoder.java
@@ -78,7 +78,7 @@ public class MinecraftDecoder extends MessageToMessageDecoder<ByteBuf>
} else {
packetTypeStr = "unknown";
}
- throw new DecoderException("Error decoding packet " + packetTypeStr + " with contents:\n" + ByteBufUtil.prettyHexDump(slice), e);
+ throw new FastDecoderException("Error decoding packet " + packetTypeStr + " with contents:\n" + ByteBufUtil.prettyHexDump(slice), e); // Waterfall
} finally
{
if ( slice != null )
diff --git a/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java b/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java
index edd44135..08af9d08 100644
--- a/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java
+++ b/proxy/src/main/java/net/md_5/bungee/connection/InitialHandler.java
@@ -15,6 +15,8 @@ import java.util.Set;
import java.util.UUID;
import java.util.logging.Level;
import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+
import lombok.Getter;
import lombok.RequiredArgsConstructor;
import net.md_5.bungee.BungeeCord;
@@ -445,6 +447,14 @@ public class InitialHandler extends PacketHandler implements PendingConnection
Preconditions.checkState( EncryptionUtil.check( loginRequest.getPublicKey(), encryptResponse, request ), "Invalid verification" );
SecretKey sharedKey = EncryptionUtil.getSecret( encryptResponse, request );
+ // Waterfall start
+ if (sharedKey instanceof SecretKeySpec) {
+ if (sharedKey.getEncoded().length != 16) {
+ this.ch.close();
+ return;
+ }
+ }
+ // Waterfall end
BungeeCipher decrypt = EncryptionUtil.getCipher( false, sharedKey );
ch.addBefore( PipelineUtils.FRAME_DECODER, PipelineUtils.DECRYPT_HANDLER, new CipherDecoder( decrypt ) );
BungeeCipher encrypt = EncryptionUtil.getCipher( true, sharedKey );
diff --git a/query/src/main/java/net/md_5/bungee/query/QueryHandler.java b/query/src/main/java/net/md_5/bungee/query/QueryHandler.java
index ac99d02c..0c1ecfb8 100644
--- a/query/src/main/java/net/md_5/bungee/query/QueryHandler.java
+++ b/query/src/main/java/net/md_5/bungee/query/QueryHandler.java
@@ -32,6 +32,7 @@ public class QueryHandler extends SimpleChannelInboundHandler<DatagramPacket>
/*========================================================================*/
private final Random random = new Random();
private final Cache<InetAddress, QuerySession> sessions = CacheBuilder.newBuilder().expireAfterWrite( 30, TimeUnit.SECONDS ).build();
+ private static io.github.waterfallmc.waterfall.utils.FastException cachedNoSessionException = new io.github.waterfallmc.waterfall.utils.FastException("No Session!");
private void writeShort(ByteBuf buf, int s)
{
@@ -96,7 +97,7 @@ public class QueryHandler extends SimpleChannelInboundHandler<DatagramPacket>
QuerySession session = sessions.getIfPresent( msg.sender().getAddress() );
if ( session == null || session.getToken() != challengeToken )
{
- throw new IllegalStateException( "No session!" );
+ throw cachedNoSessionException; // Waterfall
}
// Waterfall start
--
2.35.3
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