# Half Life 1 engine games (HL 1, Quake 2/3/World, Counterstrike 1.6, etc.)# Pattern attributes: good veryfast fast# Protocol groups: game proprietary# Wiki: http://www.protocolinfo.org/wiki/Half-Life http://www.protocolinfo.org/wiki/Counter-Strike http://www.protocolinfo.org/wiki/Day_of_Defeat# Copyright (C) 2008 Matthew Strait, Ethan Sommer; See ../LICENSE## Contributed by Laurens Blankers <laurens AT blankersfamily.com>, who says:## This pattern has been tested with QuakeWorld (2.30), Quake 2 (3.20), # Quake 3 (1.32), and Half-life (1.1.1.0). But may also work on other# games based on the Quake engine.## Clayton Macleod <cherrytwist A gmail.com> says:# [This should match] Counter-Strike v1.6, [...] the slightly updated# Counter-Strike: Condition Zero, and the game Day Of Defeat, Team# Fortress Classic, Deathmatch Classic, Ricochet, Half-Life [1] Deathmatch,# and I imagine all the other 3rd party mods that also use this engine# will match that pattern.quake-halflife# All quake (like) protocols start with 4x 0xFF. Then the client either# issues getinfo or getchallenge.^\xff\xff\xff\xffget(info|challenge)# A previous quake pattern allowed the connection to start with only 2 bytes# of 0xFF. This doesn't seem to ever happen, but we should keep an eye out# for it.