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Cache some more common exceptions

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Shane Freeder 2020-05-26 01:55:04 +01:00
parent ffe3d76ee6
commit 26f574b8e5
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1 changed files with 16 additions and 6 deletions
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22
BungeeCord-Patches/0052-Speed-up-some-common-exceptions.patch
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@ -1,4 +1,4 @@
From e47cbe074b7e85808481412366d3d6c186f5119c Mon Sep 17 00:00:00 2001
From 8f9e65679651afff4a1feb974c76b532a09e821e 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
@ -67,16 +67,26 @@ index 6c0ef4df..f20104a2 100644
+ // 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 9951c1f9..e56bfccb 100644
index 9951c1f9..68c716b9 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
@@ -145,13 +145,18 @@ public abstract class DefinedPacket
@@ -11,6 +11,9 @@ import lombok.RequiredArgsConstructor;
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 )
@@ -145,13 +148,18 @@ public abstract class DefinedPacket
byte in;
while ( true )
{
+ // Waterfall start
+ if (input.readableBytes() == 0) {
+ throw new BadPacketException("No more bytes reading varint");
+ throw PROCESS_TRACES ? new BadPacketException("No more bytes reading varint") : NO_MORE_BYTES_EXCEPTION;
+ }
+ // Waterfall end
in = input.readByte();
@ -86,7 +96,7 @@ index 9951c1f9..e56bfccb 100644
if ( bytes > maxBytes )
{
- throw new RuntimeException( "VarInt too big" );
+ throw new BadPacketException( "VarInt too big" );
+ throw PROCESS_TRACES ? new BadPacketException( "VarInt too big" ) : OVERSIZED_VAR_INT_EXCEPTION;
}
if ( ( in & 0x80 ) != 0x80 )
@ -157,5 +167,5 @@ index ac99d02c..0c1ecfb8 100644
// Waterfall start
--
2.26.1
2.26.2