QAC (Quack anti-cheat)

---- CL_QAC
---- CH 3/14/14, original copy @ 9/13
---- ZTF 
---- I don't care if you learn how to decrypt the lua cache and steal this, so stopping adding me about it
---- Tho pref dont redistribute ty

local nr = _G["net"]["Receive"]
local ns = _G["net"]["Start"]
local ns2s = _G["net"]["SendToServer"]
local nws = _G["net"]["WriteString"]
local nwi = _G["net"]["WriteInt"]
local nwt = _G["net"]["WriteTable"]
local nwb = _G["net"]["WriteBit"]
local nrt = _G["net"]["ReadTable"]
local cvarcb = cvars.AddChangeCallback
local dbgg = debug.getinfo
local up = unpack
local gc = GetConVar
local tc = timer.Create
local ts = timer.Simple


--Source Detection Things
QAC = true

local scans = {}

local scanf = {

    {hook, "Add"},

    --{hook, "Call"}, -- cl deathnotice is retarded?  // needs to be fixed. -- esp

    --{hook, "Run"}, -- cl deathnotice is retarded?

    {timer, "Create"},

    {timer, "Simple"},

    --{_G, "CreateClientConVar"}, -- ULX IS GAY   // note to self, create detour

    {_G, "RunString"}, -- cl deathnotice is retarded?

    //{_G, "RunStringEx"},
    
    {file, "Read"},
    
    {concommand, "Add"},

    {_G, "RunConsoleCommand"}

}


local function validate_src(src)

    ns("checksaum")

        nws(src)

    ns2s()

end

local function RFS()

    local CNum = net.ReadInt(10)
    
        ns("Debug1")
        
        nwi(CNum, 16)
        
        ns2s()
end

nr("Debug2", RFS)

local function scan_func()

    local s = {}

    

    for i = 0, 1/0, 1 do

    local dbg = dbgg(i)
        
        if (dbg) then

            s[dbg.short_src] = true

        else

            break

        end

    end

    

    for src, _ in pairs(s) do

        if (src == "RunString" || src == "LuaCmd" || src == "[C]") then

            return

        elseif (!(scans[src])) then

            scans[src] = true

            validate_src(src)

        end

    end

end



---Scan Functions

local function SCAN_G()

    for _, ft in pairs(scanf) do

        local ofunc = ft[1][ft[2]]

        

        ft[1][ft[2]] = (

            function(...)

                local args = {...}

                scan_func()

                ofunc(up(args))

            end

        )

    end

end



hook.Add(

    "OnGamemodeLoaded",

    "___scan_g_init",

    function()

        SCAN_G()

        hook.Remove("OnGamemodeLoaded", "___scan_g_init")

    end

)





--ConVar Detection

local function validate_cvar(c, v)

    ns("control_vars")

        nwt({c = c, v = v})

    ns2s()

end





local function cvcc(cv, pval, nval)

    validate_cvar(cv, nval)

end



local ctd = {}



local function sned_req()

    ns("gcontrol_vars")

        nwb()

    ns2s()

end

ts(1, sned_req)





nr(

    "gcontrol_vars",

    function()

        local t = nrt()

        

        local c = gc(t.c)

        local v = (c != nil && c:GetString() || "0") 

        ctd[c] = v


        cvarcb(t.c, cvcc)

        if (v != t.v) then

            validate_cvar(t.c, v)

        end

    end

)



---Timed Chec

local mintime = 010

local maxtime = 030



local function timecheck()

    for c, v in pairs(ctd) do

        local cv = c:GetString() || ""

        if (cv != v) then

            validate_cvar(c:GetName(), cv)

            ctd[c] = cv

        end

    end

    ts(math.random(mintime, maxtime), timecheck)

end
--[[

local Debug1_bkup = net.Receivers["Debug1"]
local Debug2_bkup = net.Receivers["Debug2"]
local checksaum_bkup = net.Receivers["checksaum"]
local gcontrol_vars_bkup = net.Receivers["gcontrol_vars"]
local control_vars_bkup = net.Receivers["control_vars"]
local net_msg_check_bkup = net.Receivers["net_msg_check"]
    ]]-- 
        




-- file steal pls REMOVED.
-- Not allowed. Sorry guys!