904 lines
28 KiB
Lua
904 lines
28 KiB
Lua
-- ______
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-- |
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-- |
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-- | __ ___ _ __ _ _
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-- | | | | | |\ | | |_| | | | | |_ |_|
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-- |___| |______ |__| | \| | | \ |__| |_ |_ |_ |\
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-- |
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-- |
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--
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-- Reference
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-- ports = get_real_port_states(pos): gets if inputs are powered from outside
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-- newport = merge_port_states(state1, state2): just does result = state1 or state2 for every port
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-- set_port(pos, rule, state): activates/deactivates the mesecons according to the port states
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-- set_port_states(pos, ports): Applies new port states to a Luacontroller at pos
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-- run_inner(pos, code, event): runs code on the controller at pos and event
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-- reset_formspec(pos, code, errmsg): installs new code and prints error messages, without resetting LCID
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-- reset_meta(pos, code, errmsg): performs a software-reset, installs new code and prints error message
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-- run(pos, event): a wrapper for run_inner which gets code & handles errors via reset_meta
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-- resetn(pos): performs a hardware reset, turns off all ports
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--
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-- The Sandbox
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-- The whole code of the controller runs in a sandbox,
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-- a very restricted environment.
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-- Actually the only way to damage the server is to
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-- use too much memory from the sandbox.
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-- You can add more functions to the environment
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-- (see where local env is defined)
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-- Something nice to play is is appending minetest.env to it.
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local BASENAME = "mesecons_luacontroller:luacontroller"
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local rules = {
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a = {x = -1, y = 0, z = 0, name="A"},
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b = {x = 0, y = 0, z = 1, name="B"},
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c = {x = 1, y = 0, z = 0, name="C"},
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d = {x = 0, y = 0, z = -1, name="D"},
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}
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------------------
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-- Action stuff --
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------------------
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-- These helpers are required to set the port states of the luacontroller
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local function update_real_port_states(pos, rule_name, new_state)
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local meta = minetest.get_meta(pos)
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if rule_name == nil then
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meta:set_int("real_portstates", 1)
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return
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end
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local n = meta:get_int("real_portstates") - 1
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local L = {}
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for i = 1, 4 do
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L[i] = n % 2
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n = math.floor(n / 2)
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end
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-- (0,-1) (-1,0) (1,0) (0,1)
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local pos_to_side = { 4, 1, nil, 3, 2 }
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if rule_name.x == nil then
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for _, rname in ipairs(rule_name) do
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local port = pos_to_side[rname.x + (2 * rname.z) + 3]
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L[port] = (newstate == "on") and 1 or 0
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end
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else
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local port = pos_to_side[rule_name.x + (2 * rule_name.z) + 3]
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L[port] = (new_state == "on") and 1 or 0
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end
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meta:set_int("real_portstates",
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1 +
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1 * L[1] +
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2 * L[2] +
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4 * L[3] +
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8 * L[4])
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end
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local port_names = {"a", "b", "c", "d"}
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local function get_real_port_states(pos)
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-- Determine if ports are powered (by itself or from outside)
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local meta = minetest.get_meta(pos)
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local L = {}
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local n = meta:get_int("real_portstates") - 1
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for _, name in ipairs(port_names) do
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L[name] = ((n % 2) == 1)
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n = math.floor(n / 2)
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end
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return L
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end
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local function merge_port_states(ports, vports)
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return {
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a = ports.a or vports.a,
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b = ports.b or vports.b,
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c = ports.c or vports.c,
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d = ports.d or vports.d,
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}
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end
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local function generate_name(ports)
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local d = ports.d and 1 or 0
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local c = ports.c and 1 or 0
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local b = ports.b and 1 or 0
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local a = ports.a and 1 or 0
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return BASENAME..d..c..b..a
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end
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local function set_port(pos, rule, state)
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if state then
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mesecon.receptor_on(pos, {rule})
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else
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mesecon.receptor_off(pos, {rule})
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end
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end
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local function clean_port_states(ports)
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ports.a = ports.a and true or false
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ports.b = ports.b and true or false
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ports.c = ports.c and true or false
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ports.d = ports.d and true or false
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end
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local function set_port_states(pos, ports)
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local node = minetest.get_node(pos)
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local name = node.name
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clean_port_states(ports)
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local vports = minetest.registered_nodes[name].virtual_portstates
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local new_name = generate_name(ports)
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if name ~= new_name and vports then
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-- Problem:
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-- We need to place the new node first so that when turning
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-- off some port, it won't stay on because the rules indicate
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-- there is an onstate output port there.
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-- When turning the output off then, it will however cause feedback
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-- so that the luacontroller will receive an "off" event by turning
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-- its output off.
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-- Solution / Workaround:
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-- Remember which output was turned off and ignore next "off" event.
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local meta = minetest.get_meta(pos)
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local ign = minetest.deserialize(meta:get_string("ignore_offevents"), true) or {}
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if ports.a and not vports.a and not mesecon.is_powered(pos, rules.a) then ign.A = true end
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if ports.b and not vports.b and not mesecon.is_powered(pos, rules.b) then ign.B = true end
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if ports.c and not vports.c and not mesecon.is_powered(pos, rules.c) then ign.C = true end
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if ports.d and not vports.d and not mesecon.is_powered(pos, rules.d) then ign.D = true end
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meta:set_string("ignore_offevents", minetest.serialize(ign))
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minetest.swap_node(pos, {name = new_name, param2 = node.param2})
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if ports.a ~= vports.a then set_port(pos, rules.a, ports.a) end
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if ports.b ~= vports.b then set_port(pos, rules.b, ports.b) end
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if ports.c ~= vports.c then set_port(pos, rules.c, ports.c) end
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if ports.d ~= vports.d then set_port(pos, rules.d, ports.d) end
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end
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end
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-----------------
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-- Overheating --
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-----------------
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local function burn_controller(pos)
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local node = minetest.get_node(pos)
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node.name = BASENAME.."_burnt"
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minetest.swap_node(pos, node)
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minetest.get_meta(pos):set_string("lc_memory", "");
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-- Wait for pending operations
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minetest.after(0.2, mesecon.receptor_off, pos, mesecon.rules.flat)
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end
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local function overheat(pos, meta)
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if mesecon.do_overheat(pos) then -- If too hot
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burn_controller(pos)
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return true
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end
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end
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------------------------
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-- Ignored off events --
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------------------------
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local function ignore_event(event, meta)
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if event.type ~= "off" then return false end
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local ignore_offevents = minetest.deserialize(meta:get_string("ignore_offevents"), true) or {}
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if ignore_offevents[event.pin.name] then
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ignore_offevents[event.pin.name] = nil
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meta:set_string("ignore_offevents", minetest.serialize(ignore_offevents))
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return true
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end
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end
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-------------------------
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-- Parsing and running --
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-------------------------
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local function safe_print(param)
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local string_meta = getmetatable("")
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local sandbox = string_meta.__index
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string_meta.__index = string -- Leave string sandbox temporarily
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print(dump(param))
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string_meta.__index = sandbox -- Restore string sandbox
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end
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local function safe_date()
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return(os.date("*t",os.time()))
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end
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-- string.rep(str, n) with a high value for n can be used to DoS
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-- the server. Therefore, limit max. length of generated string.
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local function safe_string_rep(str, n)
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if #str * n > mesecon.setting("luacontroller_string_rep_max", 64000) then
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debug.sethook() -- Clear hook
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error("string.rep: string length overflow", 2)
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end
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return string.rep(str, n)
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end
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-- string.find with a pattern can be used to DoS the server.
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-- Therefore, limit string.find to patternless matching.
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local function safe_string_find(...)
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if (select(4, ...)) ~= true then
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debug.sethook() -- Clear hook
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error("string.find: 'plain' (fourth parameter) must always be true in a Luacontroller")
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end
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return string.find(...)
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end
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local function remove_functions(x)
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local tp = type(x)
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if tp == "function" then
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return nil
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end
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-- Make sure to not serialize the same table multiple times, otherwise
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-- writing mem.test = mem in the Luacontroller will lead to infinite recursion
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local seen = {}
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local function rfuncs(x)
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if x == nil then return end
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if seen[x] then return end
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seen[x] = true
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if type(x) ~= "table" then return end
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for key, value in pairs(x) do
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if type(key) == "function" or type(value) == "function" then
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x[key] = nil
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else
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if type(key) == "table" then
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rfuncs(key)
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end
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if type(value) == "table" then
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rfuncs(value)
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end
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end
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end
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end
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rfuncs(x)
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return x
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end
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-- The setting affects API so is not intended to be changeable at runtime
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local get_interrupt
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if mesecon.setting("luacontroller_lightweight_interrupts", false) then
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-- use node timer
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get_interrupt = function(pos, itbl, send_warning)
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return (function(time, iid)
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if type(time) ~= "number" then error("Delay must be a number") end
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if iid ~= nil then send_warning("Interrupt IDs are disabled on this server") end
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table.insert(itbl, function() minetest.get_node_timer(pos):start(time) end)
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end)
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end
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else
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-- use global action queue
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-- itbl: Flat table of functions to run after sandbox cleanup, used to prevent various security hazards
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get_interrupt = function(pos, itbl, send_warning)
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-- iid = interrupt id
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local function interrupt(time, iid)
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-- NOTE: This runs within string metatable sandbox, so don't *rely* on anything of the form (""):y
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-- Hence the values get moved out. Should take less time than original, so totally compatible
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if type(time) ~= "number" then error("Delay must be a number") end
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table.insert(itbl, function ()
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-- Outside string metatable sandbox, can safely run this now
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local luac_id = minetest.get_meta(pos):get_int("luac_id")
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-- Check if IID is dodgy, so you can't use interrupts to store an infinite amount of data.
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-- Note that this is safe from alter-after-free because this code gets run after the sandbox has ended.
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-- This runs outside of the timer and *shouldn't* harm perf. unless dodgy data is being sent in the first place
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iid = remove_functions(iid)
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local msg_ser = minetest.serialize(iid)
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if #msg_ser <= mesecon.setting("luacontroller_interruptid_maxlen", 256) then
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mesecon.queue:add_action(pos, "lc_interrupt", {luac_id, iid}, time, iid, 1)
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else
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send_warning("An interrupt ID was too large!")
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end
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end)
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end
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return interrupt
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end
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end
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-- Given a message object passed to digiline_send, clean it up into a form
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-- which is safe to transmit over the network and compute its "cost" (a very
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-- rough estimate of its memory usage).
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--
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-- The cleaning comprises the following:
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-- 1. Functions (and userdata, though user scripts ought not to get hold of
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-- those in the first place) are removed, because they break the model of
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-- Digilines as a network that carries basic data, and they could exfiltrate
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-- references to mutable objects from one Luacontroller to another, allowing
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-- inappropriate high-bandwidth, no-wires communication.
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-- 2. Tables are duplicated because, being mutable, they could otherwise be
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-- modified after the send is complete in order to change what data arrives
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-- at the recipient, perhaps in violation of the previous cleaning rule or
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-- in violation of the message size limit.
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--
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-- The cost indication is only approximate; it’s not a perfect measurement of
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-- the number of bytes of memory used by the message object.
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--
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-- Parameters:
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-- msg -- the message to clean
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-- back_references -- for internal use only; do not provide
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--
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-- Returns:
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-- 1. The cleaned object.
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-- 2. The approximate cost of the object.
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local function clean_and_weigh_digiline_message(msg, back_references)
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local t = type(msg)
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if t == "string" then
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-- Strings are immutable so can be passed by reference, and cost their
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-- length plus the size of the Lua object header (24 bytes on a 64-bit
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-- platform) plus one byte for the NUL terminator.
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return msg, #msg + 25
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elseif t == "number" then
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-- Numbers are passed by value so need not be touched, and cost 8 bytes
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-- as all numbers in Lua are doubles.
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return msg, 8
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elseif t == "boolean" then
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-- Booleans are passed by value so need not be touched, and cost 1
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-- byte.
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return msg, 1
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elseif t == "table" then
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-- Tables are duplicated. Check if this table has been seen before
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-- (self-referential or shared table); if so, reuse the cleaned value
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-- of the previous occurrence, maintaining table topology and avoiding
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-- infinite recursion, and charge zero bytes for this as the object has
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-- already been counted.
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back_references = back_references or {}
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local bref = back_references[msg]
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if bref then
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return bref, 0
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end
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-- Construct a new table by cleaning all the keys and values and adding
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-- up their costs, plus 8 bytes as a rough estimate of table overhead.
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local cost = 8
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local ret = {}
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back_references[msg] = ret
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for k, v in pairs(msg) do
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local k_cost, v_cost
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k, k_cost = clean_and_weigh_digiline_message(k, back_references)
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v, v_cost = clean_and_weigh_digiline_message(v, back_references)
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if k ~= nil and v ~= nil then
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-- Only include an element if its key and value are of legal
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-- types.
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ret[k] = v
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end
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-- If we only counted the cost of a table element when we actually
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-- used it, we would be vulnerable to the following attack:
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-- 1. Construct a huge table (too large to pass the cost limit).
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-- 2. Insert it somewhere in a table, with a function as a key.
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-- 3. Insert it somewhere in another table, with a number as a key.
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-- 4. The first occurrence doesn’t pay the cost because functions
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-- are stripped and therefore the element is dropped.
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-- 5. The second occurrence doesn’t pay the cost because it’s in
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-- back_references.
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-- By counting the costs regardless of whether the objects will be
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-- included, we avoid this attack; it may overestimate the cost of
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-- some messages, but only those that won’t be delivered intact
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-- anyway because they contain illegal object types.
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cost = cost + k_cost + v_cost
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end
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return ret, cost
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else
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return nil, 0
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end
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end
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-- itbl: Flat table of functions to run after sandbox cleanup, used to prevent various security hazards
|
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local function get_digiline_send(pos, itbl, send_warning)
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if not minetest.global_exists("digilines") then return end
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local chan_maxlen = mesecon.setting("luacontroller_digiline_channel_maxlen", 256)
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local maxlen = mesecon.setting("luacontroller_digiline_maxlen", 50000)
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return function(channel, msg)
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-- NOTE: This runs within string metatable sandbox, so don't *rely* on anything of the form (""):y
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-- or via anything that could.
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-- Make sure channel is string, number or boolean
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||
if type(channel) == "string" then
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if #channel > chan_maxlen then
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send_warning("Channel string too long.")
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return false
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end
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elseif (type(channel) ~= "string" and type(channel) ~= "number" and type(channel) ~= "boolean") then
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send_warning("Channel must be string, number or boolean.")
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return false
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end
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|
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local msg_cost
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msg, msg_cost = clean_and_weigh_digiline_message(msg)
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if msg == nil or msg_cost > maxlen then
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send_warning("Message was too complex, or contained invalid data.")
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return false
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end
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table.insert(itbl, function ()
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-- Runs outside of string metatable sandbox
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local luac_id = minetest.get_meta(pos):get_int("luac_id")
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mesecon.queue:add_action(pos, "lc_digiline_relay", {channel, luac_id, msg})
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end)
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return true
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end
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end
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|
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local safe_globals = {
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||
-- Don't add pcall/xpcall unless willing to deal with the consequences (unless very careful, incredibly likely to allow killing server indirectly)
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||
"assert", "error", "ipairs", "next", "pairs", "select",
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||
"tonumber", "tostring", "type", "unpack", "_VERSION"
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||
}
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||
|
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local function create_environment(pos, mem, event, itbl, send_warning)
|
||
-- Gather variables for the environment
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||
local vports = minetest.registered_nodes[minetest.get_node(pos).name].virtual_portstates
|
||
local vports_copy = {}
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for k, v in pairs(vports) do vports_copy[k] = v end
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local rports = get_real_port_states(pos)
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||
|
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-- Create new library tables on each call to prevent one Luacontroller
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-- from breaking a library and messing up other Luacontrollers.
|
||
local env = {
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||
pin = merge_port_states(vports, rports),
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port = vports_copy,
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event = event,
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mem = mem,
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heat = mesecon.get_heat(pos),
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heat_max = mesecon.setting("overheat_max", 20),
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print = safe_print,
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interrupt = get_interrupt(pos, itbl, send_warning),
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||
digiline_send = get_digiline_send(pos, itbl, send_warning),
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string = {
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||
byte = string.byte,
|
||
char = string.char,
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||
format = string.format,
|
||
len = string.len,
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||
lower = string.lower,
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||
upper = string.upper,
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||
rep = safe_string_rep,
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||
reverse = string.reverse,
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||
sub = string.sub,
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||
find = safe_string_find,
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||
},
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||
math = {
|
||
abs = math.abs,
|
||
acos = math.acos,
|
||
asin = math.asin,
|
||
atan = math.atan,
|
||
atan2 = math.atan2,
|
||
ceil = math.ceil,
|
||
cos = math.cos,
|
||
cosh = math.cosh,
|
||
deg = math.deg,
|
||
exp = math.exp,
|
||
floor = math.floor,
|
||
fmod = math.fmod,
|
||
frexp = math.frexp,
|
||
huge = math.huge,
|
||
ldexp = math.ldexp,
|
||
log = math.log,
|
||
log10 = math.log10,
|
||
max = math.max,
|
||
min = math.min,
|
||
modf = math.modf,
|
||
pi = math.pi,
|
||
pow = math.pow,
|
||
rad = math.rad,
|
||
random = math.random,
|
||
sin = math.sin,
|
||
sinh = math.sinh,
|
||
sqrt = math.sqrt,
|
||
tan = math.tan,
|
||
tanh = math.tanh,
|
||
},
|
||
table = {
|
||
concat = table.concat,
|
||
insert = table.insert,
|
||
maxn = table.maxn,
|
||
remove = table.remove,
|
||
sort = table.sort,
|
||
},
|
||
os = {
|
||
clock = os.clock,
|
||
difftime = os.difftime,
|
||
time = os.time,
|
||
datetable = safe_date,
|
||
},
|
||
}
|
||
env._G = env
|
||
|
||
for _, name in pairs(safe_globals) do
|
||
env[name] = _G[name]
|
||
end
|
||
|
||
return env
|
||
end
|
||
|
||
|
||
local function timeout()
|
||
debug.sethook() -- Clear hook
|
||
error("Code timed out!", 2)
|
||
end
|
||
|
||
|
||
local function create_sandbox(code, env)
|
||
if code:byte(1) == 27 then
|
||
return nil, "Binary code prohibited."
|
||
end
|
||
local f, msg = loadstring(code)
|
||
if not f then return nil, msg end
|
||
setfenv(f, env)
|
||
|
||
-- Turn off JIT optimization for user code so that count
|
||
-- events are generated when adding debug hooks
|
||
if rawget(_G, "jit") then
|
||
jit.off(f, true)
|
||
end
|
||
|
||
local maxevents = mesecon.setting("luacontroller_maxevents", 10000)
|
||
return function(...)
|
||
-- NOTE: This runs within string metatable sandbox, so the setting's been moved out for safety
|
||
-- Use instruction counter to stop execution
|
||
-- after luacontroller_maxevents
|
||
debug.sethook(timeout, "", maxevents)
|
||
local ok, ret = pcall(f, ...)
|
||
debug.sethook() -- Clear hook
|
||
if not ok then error(ret, 0) end
|
||
return ret
|
||
end
|
||
end
|
||
|
||
|
||
local function load_memory(meta)
|
||
return minetest.deserialize(meta:get_string("lc_memory"), true) or {}
|
||
end
|
||
|
||
|
||
local function save_memory(pos, meta, mem)
|
||
local memstring = minetest.serialize(remove_functions(mem))
|
||
local memsize_max = mesecon.setting("luacontroller_memsize", 100000)
|
||
|
||
if (#memstring <= memsize_max) then
|
||
meta:set_string("lc_memory", memstring)
|
||
meta:mark_as_private("lc_memory")
|
||
else
|
||
print("Error: Luacontroller memory overflow. "..memsize_max.." bytes available, "
|
||
..#memstring.." required. Controller overheats.")
|
||
burn_controller(pos)
|
||
end
|
||
end
|
||
|
||
-- Returns success (boolean), errmsg (string)
|
||
-- run (as opposed to run_inner) is responsible for setting up meta according to this output
|
||
local function run_inner(pos, code, event)
|
||
local meta = minetest.get_meta(pos)
|
||
-- Note: These return success, presumably to avoid changing LC ID.
|
||
if overheat(pos) then return true, "" end
|
||
if ignore_event(event, meta) then return true, "" end
|
||
|
||
-- Load code & mem from meta
|
||
local mem = load_memory(meta)
|
||
local code = meta:get_string("code")
|
||
|
||
-- 'Last warning' label.
|
||
local warning = ""
|
||
local function send_warning(str)
|
||
warning = "Warning: " .. str
|
||
end
|
||
|
||
-- Create environment
|
||
local itbl = {}
|
||
local env = create_environment(pos, mem, event, itbl, send_warning)
|
||
|
||
-- Create the sandbox and execute code
|
||
local f, msg = create_sandbox(code, env)
|
||
if not f then return false, msg end
|
||
-- Start string true sandboxing
|
||
local onetruestring = getmetatable("")
|
||
-- If a string sandbox is already up yet inconsistent, something is very wrong
|
||
assert(onetruestring.__index == string)
|
||
onetruestring.__index = env.string
|
||
local success, msg = pcall(f)
|
||
onetruestring.__index = string
|
||
-- End string true sandboxing
|
||
if not success then return false, msg end
|
||
if type(env.port) ~= "table" then
|
||
return false, "Ports set are invalid."
|
||
end
|
||
|
||
-- Actually set the ports
|
||
set_port_states(pos, env.port)
|
||
|
||
-- Save memory. This may burn the luacontroller if a memory overflow occurs.
|
||
save_memory(pos, meta, env.mem)
|
||
|
||
-- Execute deferred tasks
|
||
for _, v in ipairs(itbl) do
|
||
local failure = v()
|
||
if failure then
|
||
return false, failure
|
||
end
|
||
end
|
||
return true, warning
|
||
end
|
||
|
||
local function reset_formspec(meta, code, errmsg)
|
||
meta:set_string("code", code)
|
||
meta:mark_as_private("code")
|
||
code = minetest.formspec_escape(code or "")
|
||
errmsg = minetest.formspec_escape(tostring(errmsg or ""))
|
||
meta:set_string("formspec", "size[12,10]"
|
||
.."background[-0.2,-0.25;12.4,10.75;jeija_luac_background.png]"
|
||
.."label[0.1,8.3;"..errmsg.."]"
|
||
.."textarea[0.2,0.2;12.2,9.5;code;;"..code.."]"
|
||
.."image_button[4.75,8.75;2.5,1;jeija_luac_runbutton.png;program;]"
|
||
.."image_button_exit[11.72,-0.25;0.425,0.4;jeija_close_window.png;exit;]"
|
||
)
|
||
end
|
||
|
||
local function reset_meta(pos, code, errmsg)
|
||
local meta = minetest.get_meta(pos)
|
||
reset_formspec(meta, code, errmsg)
|
||
meta:set_int("luac_id", math.random(1, 65535))
|
||
end
|
||
|
||
-- Wraps run_inner with LC-reset-on-error
|
||
local function run(pos, event)
|
||
local meta = minetest.get_meta(pos)
|
||
local code = meta:get_string("code")
|
||
local ok, errmsg = run_inner(pos, code, event)
|
||
if not ok then
|
||
reset_meta(pos, code, errmsg)
|
||
else
|
||
reset_formspec(meta, code, errmsg)
|
||
end
|
||
return ok, errmsg
|
||
end
|
||
|
||
local function reset(pos)
|
||
set_port_states(pos, {a=false, b=false, c=false, d=false})
|
||
end
|
||
|
||
local function node_timer(pos)
|
||
if minetest.registered_nodes[minetest.get_node(pos).name].is_burnt then
|
||
return false
|
||
end
|
||
run(pos, {type="interrupt"})
|
||
return false
|
||
end
|
||
|
||
-----------------------
|
||
-- A.Queue callbacks --
|
||
-----------------------
|
||
|
||
mesecon.queue:add_function("lc_interrupt", function (pos, luac_id, iid)
|
||
-- There is no luacontroller anymore / it has been reprogrammed / replaced / burnt
|
||
if (minetest.get_meta(pos):get_int("luac_id") ~= luac_id) then return end
|
||
if (minetest.registered_nodes[minetest.get_node(pos).name].is_burnt) then return end
|
||
run(pos, {type="interrupt", iid = iid})
|
||
end)
|
||
|
||
mesecon.queue:add_function("lc_digiline_relay", function (pos, channel, luac_id, msg)
|
||
if not digiline then return end
|
||
-- This check is only really necessary because in case of server crash, old actions can be thrown into the future
|
||
if (minetest.get_meta(pos):get_int("luac_id") ~= luac_id) then return end
|
||
if (minetest.registered_nodes[minetest.get_node(pos).name].is_burnt) then return end
|
||
-- The actual work
|
||
digiline:receptor_send(pos, digiline.rules.default, channel, msg)
|
||
end)
|
||
|
||
-----------------------
|
||
-- Node Registration --
|
||
-----------------------
|
||
|
||
local output_rules = {}
|
||
local input_rules = {}
|
||
|
||
local node_box = {
|
||
type = "fixed",
|
||
fixed = {
|
||
{-8/16, -8/16, -8/16, 8/16, -7/16, 8/16}, -- Bottom slab
|
||
{-5/16, -7/16, -5/16, 5/16, -6/16, 5/16}, -- Circuit board
|
||
{-3/16, -6/16, -3/16, 3/16, -5/16, 3/16}, -- IC
|
||
}
|
||
}
|
||
|
||
local selection_box = {
|
||
type = "fixed",
|
||
fixed = { -8/16, -8/16, -8/16, 8/16, -5/16, 8/16 },
|
||
}
|
||
|
||
local digiline = {
|
||
receptor = {},
|
||
effector = {
|
||
action = function(pos, node, channel, msg)
|
||
msg = clean_and_weigh_digiline_message(msg)
|
||
run(pos, {type = "digiline", channel = channel, msg = msg})
|
||
end
|
||
}
|
||
}
|
||
|
||
local function get_program(pos)
|
||
local meta = minetest.get_meta(pos)
|
||
return meta:get_string("code")
|
||
end
|
||
|
||
local function set_program(pos, code)
|
||
reset(pos)
|
||
reset_meta(pos, code)
|
||
return run(pos, {type="program"})
|
||
end
|
||
|
||
local function on_receive_fields(pos, form_name, fields, sender)
|
||
if not fields.program then
|
||
return
|
||
end
|
||
local name = sender:get_player_name()
|
||
if minetest.is_protected(pos, name) and not minetest.check_player_privs(name, {protection_bypass=true}) then
|
||
minetest.record_protection_violation(pos, name)
|
||
return
|
||
end
|
||
local ok, err = set_program(pos, fields.code)
|
||
if not ok then
|
||
-- it's not an error from the server perspective
|
||
minetest.log("action", "Lua controller programming error: " .. tostring(err))
|
||
end
|
||
end
|
||
|
||
for a = 0, 1 do -- 0 = off 1 = on
|
||
for b = 0, 1 do
|
||
for c = 0, 1 do
|
||
for d = 0, 1 do
|
||
local cid = tostring(d)..tostring(c)..tostring(b)..tostring(a)
|
||
local node_name = BASENAME..cid
|
||
local top = "jeija_luacontroller_top.png"
|
||
if a == 1 then
|
||
top = top.."^jeija_luacontroller_LED_A.png"
|
||
end
|
||
if b == 1 then
|
||
top = top.."^jeija_luacontroller_LED_B.png"
|
||
end
|
||
if c == 1 then
|
||
top = top.."^jeija_luacontroller_LED_C.png"
|
||
end
|
||
if d == 1 then
|
||
top = top.."^jeija_luacontroller_LED_D.png"
|
||
end
|
||
|
||
local groups
|
||
if a + b + c + d ~= 0 then
|
||
groups = {dig_immediate=2, not_in_creative_inventory=1, overheat = 1}
|
||
else
|
||
groups = {dig_immediate=2, overheat = 1}
|
||
end
|
||
|
||
output_rules[cid] = {}
|
||
input_rules[cid] = {}
|
||
if a == 1 then table.insert(output_rules[cid], rules.a) end
|
||
if b == 1 then table.insert(output_rules[cid], rules.b) end
|
||
if c == 1 then table.insert(output_rules[cid], rules.c) end
|
||
if d == 1 then table.insert(output_rules[cid], rules.d) end
|
||
|
||
if a == 0 then table.insert( input_rules[cid], rules.a) end
|
||
if b == 0 then table.insert( input_rules[cid], rules.b) end
|
||
if c == 0 then table.insert( input_rules[cid], rules.c) end
|
||
if d == 0 then table.insert( input_rules[cid], rules.d) end
|
||
|
||
local mesecons = {
|
||
effector = {
|
||
rules = input_rules[cid],
|
||
action_change = function (pos, _, rule_name, new_state)
|
||
update_real_port_states(pos, rule_name, new_state)
|
||
run(pos, {type=new_state, pin=rule_name})
|
||
end,
|
||
},
|
||
receptor = {
|
||
state = mesecon.state.on,
|
||
rules = output_rules[cid]
|
||
},
|
||
luacontroller = {
|
||
get_program = get_program,
|
||
set_program = set_program,
|
||
},
|
||
}
|
||
|
||
minetest.register_node(node_name, {
|
||
description = "Luacontroller",
|
||
drawtype = "nodebox",
|
||
tiles = {
|
||
top,
|
||
"jeija_microcontroller_bottom.png",
|
||
"jeija_microcontroller_sides.png",
|
||
"jeija_microcontroller_sides.png",
|
||
"jeija_microcontroller_sides.png",
|
||
"jeija_microcontroller_sides.png"
|
||
},
|
||
inventory_image = top,
|
||
paramtype = "light",
|
||
is_ground_content = false,
|
||
groups = groups,
|
||
drop = BASENAME.."0000",
|
||
sunlight_propagates = true,
|
||
selection_box = selection_box,
|
||
node_box = node_box,
|
||
on_construct = reset_meta,
|
||
on_receive_fields = on_receive_fields,
|
||
sounds = default.node_sound_stone_defaults(),
|
||
mesecons = mesecons,
|
||
digiline = digiline,
|
||
-- Virtual portstates are the ports that
|
||
-- the node shows as powered up (light up).
|
||
virtual_portstates = {
|
||
a = a == 1,
|
||
b = b == 1,
|
||
c = c == 1,
|
||
d = d == 1,
|
||
},
|
||
after_dig_node = function (pos, node)
|
||
mesecon.do_cooldown(pos)
|
||
mesecon.receptor_off(pos, output_rules)
|
||
end,
|
||
is_luacontroller = true,
|
||
on_timer = node_timer,
|
||
on_blast = mesecon.on_blastnode,
|
||
})
|
||
end
|
||
end
|
||
end
|
||
end
|
||
|
||
------------------------------
|
||
-- Overheated Luacontroller --
|
||
------------------------------
|
||
|
||
minetest.register_node(BASENAME .. "_burnt", {
|
||
drawtype = "nodebox",
|
||
tiles = {
|
||
"jeija_luacontroller_burnt_top.png",
|
||
"jeija_microcontroller_bottom.png",
|
||
"jeija_microcontroller_sides.png",
|
||
"jeija_microcontroller_sides.png",
|
||
"jeija_microcontroller_sides.png",
|
||
"jeija_microcontroller_sides.png"
|
||
},
|
||
inventory_image = "jeija_luacontroller_burnt_top.png",
|
||
is_burnt = true,
|
||
paramtype = "light",
|
||
is_ground_content = false,
|
||
groups = {dig_immediate=2, not_in_creative_inventory=1},
|
||
drop = BASENAME.."0000",
|
||
sunlight_propagates = true,
|
||
selection_box = selection_box,
|
||
node_box = node_box,
|
||
on_construct = reset_meta,
|
||
on_receive_fields = on_receive_fields,
|
||
sounds = default.node_sound_stone_defaults(),
|
||
virtual_portstates = {a = false, b = false, c = false, d = false},
|
||
mesecons = {
|
||
effector = {
|
||
rules = mesecon.rules.flat,
|
||
action_change = function(pos, _, rule_name, new_state)
|
||
update_real_port_states(pos, rule_name, new_state)
|
||
end,
|
||
},
|
||
},
|
||
on_blast = mesecon.on_blastnode,
|
||
})
|
||
|
||
------------------------
|
||
-- Craft Registration --
|
||
------------------------
|
||
|
||
minetest.register_craft({
|
||
output = BASENAME.."0000 2",
|
||
recipe = {
|
||
{'mesecons_materials:silicon', 'mesecons_materials:silicon', 'group:mesecon_conductor_craftable'},
|
||
{'mesecons_materials:silicon', 'mesecons_materials:silicon', 'group:mesecon_conductor_craftable'},
|
||
{'group:mesecon_conductor_craftable', 'group:mesecon_conductor_craftable', ''},
|
||
}
|
||
})
|
||
|