[recon0]

Description

If a server is sent a large number of AS2_INFO packets, a degradation or denial of service condition will occur.

This extension replaces the server's existing AS2_INFO response system with a high performance cached responder.


Requirements

• Windows
• SourceMod 1.2.1+
• EP2/OB engine

I don't plan on supporting any other build configurations at this time.


Install

• Download the attached zip file and extract to modfolder/addons/sourcemod/extensions
• From RCON
  • sm exts load query_cache

Configuration (convars (you do not need to set these for some mods))

• qcache_gameversion - Sets the version reported in AS2_INFO query responses (you can find the correct version by looking in HLSW or running the version command at the server console)
• qcache_gamedesc - Sets the game description reported in AS2_INFO query responses (sometimes you will need to change this if your server runs special game type (e.g. terror town on gmod)

Source Code

The source code is available from SVN (https://svn.microbits.info:444/sm-extensions/trunk/query_cache). The public ro username and password is anonsvn.


Known Issues (these will be fixed in a later release)

• Hidden slots are ignored
• Protocol version is set by a cvar (qcache_gameversion). If someone can provide the HL2SDK call to get the version, I'll be happy to include it.

Changelog

• 1.0.0.2
  • Initial public release
• 1.0.0.4
  • Fixed issue with EmpiresMod servers not reporting the correct description
• 1.4.0.0
  • Added the following cvars
    • qcache_gameversion - Sets the version reported in AS2_INFO query responses (you can find the correct version by looking in HLSW or running the version command at the server console)
    • qcache_gamedesc - Sets the game description reported in AS2_INFO query responses (sometimes you will need to change this if your server runs special game type (e.g. terror town on gmod)
• Next item

Credits

• A huge thanks goes to CrimsonGT for helping (HL2SDK APIs, working with MM:S, debugging SM extensions, contributing code) me with this extension.
• Thanks also to Luigi Auriemma, whose Winsock code from UDP proxy/pipe helped me learn the Winsock API.
• This extension contains code from
  • SrcdsQueryCache by Beretta Claudio
  • SRCDS Denial of Service Protect by raydan
  • Left 4 Downtown by Downtown1

[CrimsonGT]

Aw, I just finished the VSP version of it too

[recon0]

Originally Posted by CrimsonGT Aw, I just finished the VSP version of it too

Ah well...

[Inflikted]

cool glad to see this finally made into an extension

[jockersoft]

looks good, much cleaner than the tool i put together

[pheadxdll]

Windows only

[DontWannaName]

So replace this http://forums.alliedmods.net/showthread.php?t=95312 with your plugin? I like keeping things simple.

[recon0]

Originally Posted by DontWannaName So replace this http://forums.alliedmods.net/showthread.php?t=95312 with your plugin? I like keeping things simple.

I'm not sure exactly what that plugin is supposed to do. I recommend running DAF, KAC and Query Cache.

Originally Posted by pheadxdll Windows only

It's probably not hard to add Linux support. I'll have to take another look at the Linux socket library (which seems to be almost exactly the same as Winsock) and install Cygwin.

[BAILOPAN]

Nice work. Kudos on going open-source with this!

-dvander

[CrimsonGT]

Originally Posted by recon0 Ah well...

Ive been working on the VSP all day/night and I think this is causing an issue. When running it in debug mode its spamming the console with NET_RecievePacket: UNKNOWN ERROR everytime the server is queried. Im going to look into it a little bit more tommorow and make sure its not causing any serious side effects. In the meantime its a great fix for anyone being attacked. I think the errors just happening due to the server waiting to get an incoming packet that never shows up.

If I can get my current code working we can switch it away from winsock and it will work for linux and windows, but im waiting to hear back from DS on wether or not he will reverse engineer the struct I need