From 8bcafa4ef75dec34e916726104eae43f65bd6df3 Mon Sep 17 00:00:00 2001 From: Shane Freeder 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 ab9519f9..40281aa4 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 8b7e0708..37d28c01 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 } 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 b634d256..2d7101ff 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 @@ -14,6 +14,8 @@ 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; @@ -419,6 +421,14 @@ public class InitialHandler extends PacketHandler implements PendingConnection Preconditions.checkState( thisState == State.ENCRYPT, "Not expecting ENCRYPT" ); 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 /*========================================================================*/ private final Random random = new Random(); private final Cache 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 QuerySession session = sessions.getIfPresent( msg.sender().getAddress() ); if ( session == null || session.getToken() != challengeToken ) { - throw new IllegalStateException( "No session!" ); + throw cachedNoSessionException; // Waterfall } // Waterfall start -- 2.33.0