mirror of
https://github.com/sys4-fr/server-nalc.git
synced 2024-12-26 18:50:38 +01:00
631 lines
16 KiB
Lua
631 lines
16 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(pos): runs the code in the controller at pos
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-- reset_meta(pos, code, errmsg): performs a software-reset, installs new code and prints error messages
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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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-- However, as this does not prevent you from using e.g. loops,
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-- we need to check for these prohibited commands first.
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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")) 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 overheat_off(pos)
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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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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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-- Wait for pending operations
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minetest.after(0.2, overheat_off, 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")) 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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print(dump(param))
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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 == "table" then
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for key, value in pairs(x) do
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local key_t, val_t = type(key), type(value)
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if key_t == "function" or val_t == "function" then
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x[key] = nil
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else
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if key_t == "table" then
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remove_functions(key)
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end
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if val_t == "table" then
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remove_functions(value)
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end
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end
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end
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elseif tp == "function" then
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return nil
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end
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return x
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end
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local function get_interrupt(pos)
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-- iid = interrupt id
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local function interrupt(time, iid)
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if type(time) ~= "number" then return end
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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_interrupt", {luac_id, iid}, time, iid, 1)
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end
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return interrupt
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end
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local function get_digiline_send(pos)
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if not digiline then return end
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return function(channel, msg)
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minetest.after(0, function()
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digiline:receptor_send(pos, digiline.rules.default, channel, msg)
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end)
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end
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end
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local safe_globals = {
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"assert", "error", "ipairs", "next", "pairs", "pcall", "select",
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"tonumber", "tostring", "type", "unpack", "_VERSION", "xpcall",
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}
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local function create_environment(pos, mem, event)
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-- Gather variables for the environment
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local vports = minetest.registered_nodes[minetest.get_node(pos).name].virtual_portstates
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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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-- Create new library tables on each call to prevent one LuaController
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-- from breaking a library and messing up other LuaControllers.
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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 = minetest.get_meta(pos):get_int("heat"),
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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),
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digiline_send = get_digiline_send(pos),
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string = {
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byte = string.byte,
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char = string.char,
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format = string.format,
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gsub = string.gsub,
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len = string.len,
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lower = string.lower,
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upper = string.upper,
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rep = string.rep,
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reverse = string.reverse,
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sub = string.sub,
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},
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math = {
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abs = math.abs,
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acos = math.acos,
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asin = math.asin,
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atan = math.atan,
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atan2 = math.atan2,
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ceil = math.ceil,
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cos = math.cos,
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cosh = math.cosh,
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deg = math.deg,
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exp = math.exp,
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floor = math.floor,
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fmod = math.fmod,
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frexp = math.frexp,
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huge = math.huge,
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ldexp = math.ldexp,
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log = math.log,
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log10 = math.log10,
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max = math.max,
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min = math.min,
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modf = math.modf,
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pi = math.pi,
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pow = math.pow,
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rad = math.rad,
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random = math.random,
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sin = math.sin,
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sinh = math.sinh,
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sqrt = math.sqrt,
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tan = math.tan,
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tanh = math.tanh,
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},
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table = {
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concat = table.concat,
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insert = table.insert,
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maxn = table.maxn,
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remove = table.remove,
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sort = table.sort,
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},
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os = {
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clock = os.clock,
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difftime = os.difftime,
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time = os.time,
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},
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}
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env._G = env
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for _, name in pairs(safe_globals) do
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env[name] = _G[name]
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end
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return env
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end
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local function timeout()
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debug.sethook() -- Clear hook
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error("Code timed out!")
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end
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local function code_prohibited(code)
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-- LuaJIT doesn't increment the instruction counter when running
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-- loops, so we have to sanitize inputs if we're using LuaJIT.
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if not jit then
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return false
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end
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local prohibited = {"while", "for", "do", "repeat", "until", "goto"}
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code = " "..code.." "
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for _, p in ipairs(prohibited) do
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if string.find(code, "[^%w_]"..p.."[^%w_]") then
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return "Prohibited command: "..p
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end
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end
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end
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local function create_sandbox(code, env)
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if code:byte(1) == 27 then
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return nil, "Binary code prohibited."
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end
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local f, msg = loadstring(code)
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if not f then return nil, msg end
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setfenv(f, env)
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return function(...)
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debug.sethook(timeout, "", 10000)
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local ok, ret = pcall(f, ...)
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debug.sethook() -- Clear hook
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if not ok then error(ret) end
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return ret
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end
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end
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local function load_memory(meta)
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return minetest.deserialize(meta:get_string("lc_memory")) or {}
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end
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local function save_memory(meta, mem)
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meta:set_string("lc_memory",
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minetest.serialize(
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remove_functions(mem)
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)
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)
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end
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local function run(pos, event)
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local meta = minetest.get_meta(pos)
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if overheat(pos) then return end
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if ignore_event(event, meta) then return end
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-- Load code & mem from meta
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local mem = load_memory(meta)
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local code = meta:get_string("code")
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local err = code_prohibited(code)
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if err then return err end
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-- Create environment
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local env = create_environment(pos, mem, event)
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-- Create the sandbox and execute code
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local f, msg = create_sandbox(code, env)
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if not f then return msg end
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local success, msg = pcall(f)
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if not success then return msg end
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if type(env.port) ~= "table" then
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return "Ports set are invalid."
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end
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save_memory(meta, env.mem)
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-- Actually set the ports
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set_port_states(pos, env.port)
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end
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mesecon.queue:add_function("lc_interrupt", function (pos, luac_id, iid)
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-- There is no luacontroller anymore / it has been reprogrammed / replaced
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if (minetest.get_meta(pos):get_int("luac_id") ~= luac_id) then return end
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run(pos, {type="interrupt", iid = iid})
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end)
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local function reset_meta(pos, code, errmsg)
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local meta = minetest.get_meta(pos)
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meta:set_string("code", code)
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code = minetest.formspec_escape(code or "")
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errmsg = minetest.formspec_escape(errmsg or "")
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meta:set_string("formspec", "size[10,8]"..
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"background[-0.2,-0.25;10.4,8.75;jeija_luac_background.png]"..
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"textarea[0.2,0.6;10.2,5;code;;"..code.."]"..
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"image_button[3.75,6;2.5,1;jeija_luac_runbutton.png;program;]"..
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"image_button_exit[9.72,-0.25;0.425,0.4;jeija_close_window.png;exit;]"..
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"label[0.1,5;"..errmsg.."]")
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meta:set_int("heat", 0)
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meta:set_int("luac_id", math.random(1, 65535))
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end
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local function reset(pos)
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set_port_states(pos, {a=false, b=false, c=false, d=false})
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end
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-----------------------
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-- Node Registration --
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-----------------------
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local output_rules = {}
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local input_rules = {}
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local node_box = {
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type = "fixed",
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fixed = {
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{-8/16, -8/16, -8/16, 8/16, -7/16, 8/16}, -- Bottom slab
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{-5/16, -7/16, -5/16, 5/16, -6/16, 5/16}, -- Circuit board
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{-3/16, -6/16, -3/16, 3/16, -5/16, 3/16}, -- IC
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}
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}
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local selection_box = {
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type = "fixed",
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fixed = { -8/16, -8/16, -8/16, 8/16, -5/16, 8/16 },
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}
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local digiline = {
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receptor = {},
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effector = {
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action = function(pos, node, channel, msg)
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run(pos, {type = "digiline", channel = channel, msg = msg})
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end
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}
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}
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local function on_receive_fields(pos, form_name, fields)
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if not fields.program then
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return
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end
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reset(pos)
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reset_meta(pos, fields.code)
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local err = run(pos, {type="program"})
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if err then
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print(err)
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reset_meta(pos, fields.code, err)
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end
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end
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for a = 0, 1 do -- 0 = off 1 = on
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for b = 0, 1 do
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for c = 0, 1 do
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for d = 0, 1 do
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local cid = tostring(d)..tostring(c)..tostring(b)..tostring(a)
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local node_name = BASENAME..cid
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local top = "jeija_luacontroller_top.png"
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if a == 1 then
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top = top.."^jeija_luacontroller_LED_A.png"
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end
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if b == 1 then
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top = top.."^jeija_luacontroller_LED_B.png"
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end
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if c == 1 then
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top = top.."^jeija_luacontroller_LED_C.png"
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end
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if d == 1 then
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top = top.."^jeija_luacontroller_LED_D.png"
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end
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local groups
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if a + b + c + d ~= 0 then
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groups = {dig_immediate=2, not_in_creative_inventory=1, overheat = 1}
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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]
|
|
}
|
|
}
|
|
|
|
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",
|
|
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.receptor_off(pos, output_rules)
|
|
end,
|
|
is_luacontroller = true,
|
|
})
|
|
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",
|
|
paramtype = "light",
|
|
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,
|
|
},
|
|
},
|
|
})
|
|
|
|
------------------------
|
|
-- 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', ''},
|
|
}
|
|
})
|
|
|