gmsv_rcon2 - Control RCON authentication with lua

[Draiget]

I din't find any working version of old gmsv_rcon module for actual gmod, therefore, I created a new module.
With this module you can pass rcon protocol thought lua, here's available hooks list:

[QUOTE]
OnRconCheckPassword ( password:string, listenerID:number, isReservedAddr:boolean, ip:string, port:number )
* isReservedAddr tells that this is is private lan address or not (engine function IsReservedAdr)

OnRconWriteRequest ( listenerID:number, requestID:number, requestType:number, data:string, isReservedAddr:boolean, ip:string, port:number )
* requestType is engine enum ServerDataRequestType_t

OnRconLogCommand ( listenerID:number, msg:string, isKnownListener:boolean, isReservedAddr:boolean, ip:string, port:number )
* if server doesn't have ip entries for current listenerID, isKnownListener will be false (isReservedAddr, ip and port will be false values too), this is engine case for Log( "rcon from \"unknown\": %s\n", msg )[/QUOTE]

[B]Download:[/B]
You can download pre-compiled binary module and his sources here, [URL="https://github.com/Draiget/gmsv_rcon2"]on github page[/URL] ([URL="https://github.com/Draiget/gmsv_rcon2/releases/download/win32_1_1/gmsv_rcon2_win32.dll"]Direct win32 latest module link[/URL]).
No Linux support yet.

[B]Example usage of this library:[/B]

require("rcon2")

--[[
	The module also provide values of enum ServerDataRequestType_t

	SERVERDATA_REQUESTVALUE = 0
	SERVERDATA_SETVALUE = 1
	SERVERDATA_EXECCOMMAND = 2
	SERVERDATA_AUTH = 3 // special RCON command to authenticate a connection
	SERVERDATA_VPROF = 4 // subscribe to a vprof stream
	SERVERDATA_REMOVE_VPROF = 5 // unsubscribe from a vprof stream
	SERVERDATA_TAKE_SCREENSHOT = 6
	SERVERDATA_SEND_CONSOLE_LOG = 7
--]]

RconAllowList = {
	["192.168.137.5"] = "CoolPasswdInLocalArea",
	["1.3.3.7"] = "AnotherPasswordForYou"
}

RconRestictedCmds = {
	"lua_run"
}

hook.Add("OnRconCheckPassword", "RCON_IsPassword", function( password, listenerId, isLan, ip, port )
	-- Any error in rcon hooks will cause "Lua Panic" error and server crash
	-- This is simple try\catch style call
	local state, msgOrArgs = pcall( function()
		local passRef = RconAllowList[ ip ]
		if ( !passRef ) then
			-- Return nil to pass check onto engine
			-- Return false to mark password invalid and pass onto engine
			-- Return true to mark password valid and pass auth packet onto engine
			return
		end

		-- For example allow lan computers sending rcon with any or empty passwords
		if ( isLan ) then
			ServerLog(Format("[RCON] Auth from private lan network [%s:%d] successfull!\n", ip, port))
			return true
		end

		-- Check custom password for address entry
		if ( passRef == password ) then
			ServerLog(Format("[RCON] Auth from [%s:%d] successfull!\n", ip, port))
			return true
		end

		ServerLog(Format("[RCON] Auth from [%s:%d] failed!\n", ip, port))
		return false
	end )

	if ( !state ) then
		print( msgOrArgs )
		return false
	end

	return msgOrArgs
end)

hook.Add("OnRconWriteRequest", "RCON_WriteRequest", function( listenerId, requestId, requestType, data, isLan, ip, port )
	-- Any error in rcon hooks will cause "Lua Panic" error and server crash
	-- This is simple try\catch style call
	local state, msgOrArgs = pcall( function()
		local passRef = RconAllowList[ ip ]

		if ( !passRef ) then
			ServerLog(Format("[RCON] Unauthorized user from [%s:%d]\n", ip, port))
			return
		end

		-- Check for user command
		if ( requestType == SERVERDATA_EXECCOMMAND ) then
			local resticted = false

			for _, cmd in pairs(RconRestictedCmds) do
				if ( string.StartWith(data, cmd) ) then
					resticted = true
					break
				end
			end

			-- Disallow resticted commands from being called
			if ( resticted ) then
				ServerLog(Format("[RCON] User from [%s:%d] trying call resticted command '%s'\n", ip, port, data))

				-- Prevent engine to process this command packet
				return false
			end

			ServerLog(Format("[RCON] User from [%s:%d] execute command '%s'\n", ip, port, data))
		elseif ( requestType == SERVERDATA_AUTH ) then
			ServerLog(Format("[RCON] User from [%s:%d] trying to auth\n", ip, port))
		end
	end )

	if ( !state ) then
		print( msgOrArgs )
		return false
	end

	return msgOrArgs
end)

hook.Add("OnRconLogCommand", "RCON_LogCommand", function( listenerId, msg, isKnownListener, isLan, ip, port )
	-- Any error in rcon hooks will cause "Lua Panic" error and server crash
	-- This is simple try\catch style call
	local state, msgOrArgs = pcall( function()
		if ( isKnownListener ) then
			ServerLog(Format("[RCON] Rcon from [%s:%d]: %s\n", ip, port, msg))
			return
		end

		-- Unknown listener, let engine handle default LogCommand
		return false
	end )

	if ( !state ) then
		print( msgOrArgs )
		return false
	end

	return msgOrArgs
end)

[Draiget]

Added [I]CServerRemoteAccess::LogCommand[/I] hook, git and download link are updated.

[QUOTE]OnRconLogCommand ( listenerID:number, msg:string, isKnownListener:boolean, isReservedAddr:boolean, ip:string, port:number )[/QUOTE]

[Draiget]

Updated signatures to the latest update, windows binaries and sources may be found on github.
P.S. Posting because can't update thread header post link to the latest release after forum migration.