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-- ______
-- |
-- |
-- | __ ___ _ __ _ _
-- | | | | | |\ | | |_| | | | | |_ |_|
-- |___| |______ |__| | \| | | \ |__| |_ |_ |_ |\ tube
-- |
-- |
--
-- Reference
-- ports = get_real_port_states(pos): gets if inputs are powered from outside
-- newport = merge_port_states(state1, state2): just does result = state1 or state2 for every port
-- set_port(pos, rule, state): activates/deactivates the mesecons according to the port states
-- set_port_states(pos, ports): Applies new port states to a Luacontroller at pos
-- run_inner(pos, code, event): runs code on the controller at pos and event
-- reset_formspec(pos, code, errmsg): installs new code and prints error messages, without resetting LCID
-- reset_meta(pos, code, errmsg): performs a software-reset, installs new code and prints error message
-- run(pos, event): a wrapper for run_inner which gets code & handles errors via reset_meta
-- resetn(pos): performs a hardware reset, turns off all ports
--
-- The Sandbox
-- The whole code of the controller runs in a sandbox,
-- a very restricted environment.
-- Actually the only way to damage the server is to
-- use too much memory from the sandbox.
-- You can add more functions to the environment
-- (see where local env is defined)
-- Something nice to play is appending minetest.env to it.
local BASENAME = "pipeworks:lua_tube"
local rules = {
red = {x = -1, y = 0, z = 0, name = "red"},
blue = {x = 1, y = 0, z = 0, name = "blue"},
yellow = {x = 0, y = -1, z = 0, name = "yellow"},
green = {x = 0, y = 1, z = 0, name = "green"},
black = {x = 0, y = 0, z = -1, name = "black"},
white = {x = 0, y = 0, z = 1, name = "white"},
}
local digiline_rules_luatube = {
{x=0, y=0, z=-1},
{x=1, y=0, z=0},
{x=-1, y=0, z=0},
{x=0, y=0, z=1},
{x=1, y=1, z=0},
{x=1, y=-1, z=0},
{x=-1, y=1, z=0},
{x=-1, y=-1, z=0},
{x=0, y=1, z=1},
{x=0, y=-1, z=1},
{x=0, y=1, z=-1},
{x=0, y=-1, z=-1},
-- vertical connectivity
{x=0, y=1, z=0},
{x=0, y=-1, z=0},
}
------------------
-- Action stuff --
------------------
-- These helpers are required to set the port states of the lua_tube
local function update_real_port_states(pos, rule_name, new_state)
local meta = minetest.get_meta(pos)
if rule_name == nil then
meta:set_int("real_portstates", 1)
return
end
local n = meta:get_int("real_portstates") - 1
local L = {}
for i = 1, 6 do
L[i] = n % 2
n = math.floor(n / 2)
end
-- (0,0,-1) (0,-1,0) (-1,0,0) (1,0,0) (0,1,0) (0,0,1)
local pos_to_side = { 5, 3, 1, nil, 2, 4, 6 }
if rule_name.x == nil then
for _, rname in ipairs(rule_name) do
local port = pos_to_side[rname.x + (2 * rname.y) + (3 * rname.z) + 4]
L[port] = (new_state == "on") and 1 or 0
end
else
local port = pos_to_side[rule_name.x + (2 * rule_name.y) + (3 * rule_name.z) + 4]
L[port] = (new_state == "on") and 1 or 0
end
meta:set_int("real_portstates",
1 +
1 * L[1] +
2 * L[2] +
4 * L[3] +
8 * L[4] +
16 * L[5] +
32 * L[6])
end
local port_names = {"red", "blue", "yellow", "green", "black", "white"}
local function get_real_port_states(pos)
-- Determine if ports are powered (by itself or from outside)
local meta = minetest.get_meta(pos)
local L = {}
local n = meta:get_int("real_portstates") - 1
for _, name in ipairs(port_names) do
L[name] = ((n % 2) == 1)
n = math.floor(n / 2)
end
return L
end
local function merge_port_states(ports, vports)
return {
red = ports.red or vports.red,
blue = ports.blue or vports.blue,
yellow = ports.yellow or vports.yellow,
green = ports.green or vports.green,
black = ports.black or vports.black,
white = ports.white or vports.white,
}
end
local function generate_name(ports)
local red = ports.red and 1 or 0
local blue = ports.blue and 1 or 0
local yellow = ports.yellow and 1 or 0
local green = ports.green and 1 or 0
local black = ports.black and 1 or 0
local white = ports.white and 1 or 0
return BASENAME..white..black..green..yellow..blue..red
end
local function set_port(pos, rule, state)
if state then
mesecon.receptor_on(pos, {rule})
else
mesecon.receptor_off(pos, {rule})
end
end
local function clean_port_states(ports)
ports.red = ports.red and true or false
ports.blue = ports.blue and true or false
ports.yellow = ports.yellow and true or false
ports.green = ports.green and true or false
ports.black = ports.black and true or false
ports.white = ports.white and true or false
end
local function set_port_states(pos, ports)
local node = minetest.get_node(pos)
local name = node.name
clean_port_states(ports)
local vports = minetest.registered_nodes[name].virtual_portstates
local new_name = generate_name(ports)
if name ~= new_name and vports then
-- Problem:
-- We need to place the new node first so that when turning
-- off some port, it won't stay on because the rules indicate
-- there is an onstate output port there.
-- When turning the output off then, it will however cause feedback
-- so that the lua_tube will receive an "off" event by turning
-- its output off.
-- Solution / Workaround:
-- Remember which output was turned off and ignore next "off" event.
local meta = minetest.get_meta(pos)
local ign = minetest.deserialize(meta:get_string("ignore_offevents"), true) or {}
if ports.red and not vports.red and not mesecon.is_powered(pos, rules.red) then ign.red = true end
if ports.blue and not vports.blue and not mesecon.is_powered(pos, rules.blue) then ign.blue = true end
if ports.yellow and not vports.yellow and not mesecon.is_powered(pos, rules.yellow) then ign.yellow = true end
if ports.green and not vports.green and not mesecon.is_powered(pos, rules.green) then ign.green = true end
if ports.black and not vports.black and not mesecon.is_powered(pos, rules.black) then ign.black = true end
if ports.white and not vports.white and not mesecon.is_powered(pos, rules.white) then ign.white = true end
meta:set_string("ignore_offevents", minetest.serialize(ign))
minetest.swap_node(pos, {name = new_name, param2 = node.param2})
if ports.red ~= vports.red then set_port(pos, rules.red, ports.red) end
if ports.blue ~= vports.blue then set_port(pos, rules.blue, ports.blue) end
if ports.yellow ~= vports.yellow then set_port(pos, rules.yellow, ports.yellow) end
if ports.green ~= vports.green then set_port(pos, rules.green, ports.green) end
if ports.black ~= vports.black then set_port(pos, rules.black, ports.black) end
if ports.white ~= vports.white then set_port(pos, rules.white, ports.white) end
end
end
-----------------
-- Overheating --
-----------------
local function burn_controller(pos)
local node = minetest.get_node(pos)
node.name = BASENAME.."_burnt"
minetest.swap_node(pos, node)
minetest.get_meta(pos):set_string("lc_memory", "");
-- Wait for pending operations
minetest.after(0.2, mesecon.receptor_off, pos, mesecon.rules.flat)
end
local function overheat(pos, meta)
if mesecon.do_overheat(pos) then -- If too hot
burn_controller(pos)
return true
end
end
------------------------
-- Ignored off events --
------------------------
local function ignore_event(event, meta)
if event.type ~= "off" then return false end
local ignore_offevents = minetest.deserialize(meta:get_string("ignore_offevents"), true) or {}
if ignore_offevents[event.pin.name] then
ignore_offevents[event.pin.name] = nil
meta:set_string("ignore_offevents", minetest.serialize(ignore_offevents))
return true
end
end
-------------------------
-- Parsing and running --
-------------------------
local function safe_print(param)
local string_meta = getmetatable("")
local sandbox = string_meta.__index
string_meta.__index = string -- Leave string sandbox temporarily
print(dump(param))
string_meta.__index = sandbox -- Restore string sandbox
end
local function safe_date()
return(os.date("*t",os.time()))
end
-- string.rep(str, n) with a high value for n can be used to DoS
-- the server. Therefore, limit max. length of generated string.
local function safe_string_rep(str, n)
if #str * n > mesecon.setting("luacontroller_string_rep_max", 64000) then
debug.sethook() -- Clear hook
error("string.rep: string length overflow", 2)
end
return string.rep(str, n)
end
-- string.find with a pattern can be used to DoS the server.
-- Therefore, limit string.find to patternless matching.
local function safe_string_find(...)
if (select(4, ...)) ~= true then
debug.sethook() -- Clear hook
error("string.find: 'plain' (fourth parameter) must always be true in a lua controlled tube")
end
return string.find(...)
end
local function remove_functions(x)
local tp = type(x)
if tp == "function" then
return nil
end
-- Make sure to not serialize the same table multiple times, otherwise
-- writing mem.test = mem in the lua controlled tube will lead to infinite recursion
local seen = {}
local function rfuncs(x)
if x == nil then return end
if seen[x] then return end
seen[x] = true
if type(x) ~= "table" then return end
for key, value in pairs(x) do
if type(key) == "function" or type(value) == "function" then
x[key] = nil
else
if type(key) == "table" then
rfuncs(key)
end
if type(value) == "table" then
rfuncs(value)
end
end
end
end
rfuncs(x)
return x
end
-- The setting affects API so is not intended to be changeable at runtime
local get_interrupt
if mesecon.setting("luacontroller_lightweight_interrupts", false) then
-- use node timer
get_interrupt = function(pos, itbl, send_warning)
return (function(time, iid)
if type(time) ~= "number" then error("Delay must be a number") end
if iid ~= nil then send_warning("Interrupt IDs are disabled on this server") end
table.insert(itbl, function() minetest.get_node_timer(pos):start(time) end)
end)
end
else
-- use global action queue
-- itbl: Flat table of functions to run after sandbox cleanup, used to prevent various security hazards
get_interrupt = function(pos, itbl, send_warning)
-- iid = interrupt id
local function interrupt(time, iid)
-- NOTE: This runs within string metatable sandbox, so don't *rely* on anything of the form (""):y
-- Hence the values get moved out. Should take less time than original, so totally compatible
if type(time) ~= "number" then error("Delay must be a number") end
table.insert(itbl, function ()
-- Outside string metatable sandbox, can safely run this now
local luac_id = minetest.get_meta(pos):get_int("luac_id")
-- Check if IID is dodgy, so you can't use interrupts to store an infinite amount of data.
-- Note that this is safe from alter-after-free because this code gets run after the sandbox has ended.
-- This runs outside of the timer and *shouldn't* harm perf. unless dodgy data is being sent in the first place
iid = remove_functions(iid)
local msg_ser = minetest.serialize(iid)
if #msg_ser <= mesecon.setting("luacontroller_interruptid_maxlen", 256) then
mesecon.queue:add_action(pos, "pipeworks:lc_tube_interrupt", {luac_id, iid}, time, iid, 1)
else
send_warning("An interrupt ID was too large!")
end
end)
end
return interrupt
end
end
-- Given a message object passed to digiline_send, clean it up into a form
-- which is safe to transmit over the network and compute its "cost" (a very
-- rough estimate of its memory usage).
--
-- The cleaning comprises the following:
-- 1. Functions (and userdata, though user scripts ought not to get hold of
-- those in the first place) are removed, because they break the model of
-- Digilines as a network that carries basic data, and they could exfiltrate
-- references to mutable objects from one Luacontroller to another, allowing
-- inappropriate high-bandwidth, no-wires communication.
-- 2. Tables are duplicated because, being mutable, they could otherwise be
-- modified after the send is complete in order to change what data arrives
-- at the recipient, perhaps in violation of the previous cleaning rule or
-- in violation of the message size limit.
--
-- The cost indication is only approximate; it’s not a perfect measurement of
-- the number of bytes of memory used by the message object.
--
-- Parameters:
-- msg -- the message to clean
-- back_references -- for internal use only; do not provide
--
-- Returns:
-- 1. The cleaned object.
-- 2. The approximate cost of the object.
local function clean_and_weigh_digiline_message(msg, back_references)
local t = type(msg)
if t == "string" then
-- Strings are immutable so can be passed by reference, and cost their
-- length plus the size of the Lua object header (24 bytes on a 64-bit
-- platform) plus one byte for the NUL terminator.
return msg, #msg + 25
elseif t == "number" then
-- Numbers are passed by value so need not be touched, and cost 8 bytes
-- as all numbers in Lua are doubles.
return msg, 8
elseif t == "boolean" then
-- Booleans are passed by value so need not be touched, and cost 1
-- byte.
return msg, 1
elseif t == "table" then
-- Tables are duplicated. Check if this table has been seen before
-- (self-referential or shared table); if so, reuse the cleaned value
-- of the previous occurrence, maintaining table topology and avoiding
-- infinite recursion, and charge zero bytes for this as the object has
-- already been counted.
back_references = back_references or {}
local bref = back_references[msg]
if bref then
return bref, 0
end
-- Construct a new table by cleaning all the keys and values and adding
-- up their costs, plus 8 bytes as a rough estimate of table overhead.
local cost = 8
local ret = {}
back_references[msg] = ret
for k, v in pairs(msg) do
local k_cost, v_cost
k, k_cost = clean_and_weigh_digiline_message(k, back_references)
v, v_cost = clean_and_weigh_digiline_message(v, back_references)
if k ~= nil and v ~= nil then
-- Only include an element if its key and value are of legal
-- types.
ret[k] = v
end
-- If we only counted the cost of a table element when we actually
-- used it, we would be vulnerable to the following attack:
-- 1. Construct a huge table (too large to pass the cost limit).
-- 2. Insert it somewhere in a table, with a function as a key.
-- 3. Insert it somewhere in another table, with a number as a key.
-- 4. The first occurrence doesn’t pay the cost because functions
-- are stripped and therefore the element is dropped.
-- 5. The second occurrence doesn’t pay the cost because it’s in
-- back_references.
-- By counting the costs regardless of whether the objects will be
-- included, we avoid this attack; it may overestimate the cost of
-- some messages, but only those that won’t be delivered intact
-- anyway because they contain illegal object types.
cost = cost + k_cost + v_cost
end
return ret, cost
else
return nil, 0
end
end
-- itbl: Flat table of functions to run after sandbox cleanup, used to prevent various security hazards
local function get_digiline_send(pos, itbl, send_warning)
if not minetest.global_exists("digilines") then return end
local chan_maxlen = mesecon.setting("luacontroller_digiline_channel_maxlen", 256)
local maxlen = mesecon.setting("luacontroller_digiline_maxlen", 50000)
return function(channel, msg)
-- NOTE: This runs within string metatable sandbox, so don't *rely* on anything of the form (""):y
-- or via anything that could.
-- Make sure channel is string, number or boolean
if type(channel) == "string" then
if #channel > chan_maxlen then
send_warning("Channel string too long.")
return false
end
elseif (type(channel) ~= "string" and type(channel) ~= "number" and type(channel) ~= "boolean") then
send_warning("Channel must be string, number or boolean.")
return false
end
local msg_cost
msg, msg_cost = clean_and_weigh_digiline_message(msg)
if msg == nil or msg_cost > maxlen then
send_warning("Message was too complex, or contained invalid data.")
return false
end
table.insert(itbl, function ()
-- Runs outside of string metatable sandbox
local luac_id = minetest.get_meta(pos):get_int("luac_id")
mesecon.queue:add_action(pos, "pipeworks:lt_digiline_relay", {channel, luac_id, msg})
end)
return true
end
end
local safe_globals = {
-- Don't add pcall/xpcall unless willing to deal with the consequences (unless very careful, incredibly likely to allow killing server indirectly)
"assert", "error", "ipairs", "next", "pairs", "select",
"tonumber", "tostring", "type", "unpack", "_VERSION"
}
local function create_environment(pos, mem, event, itbl, send_warning)
-- Make sure the tube hasn't broken.
local vports = minetest.registered_nodes[minetest.get_node(pos).name].virtual_portstates
if not vports then return {} end
-- Gather variables for the environment
local vports_copy = {}
for k, v in pairs(vports) do vports_copy[k] = v end
local rports = get_real_port_states(pos)
-- Create new library tables on each call to prevent one Luacontroller
-- from breaking a library and messing up other Luacontrollers.
local env = {
pin = merge_port_states(vports, rports),
port = vports_copy,
event = event,
mem = mem,
heat = mesecon.get_heat(pos),
heat_max = mesecon.setting("overheat_max", 20),
print = safe_print,
interrupt = get_interrupt(pos, itbl, send_warning),
digiline_send = get_digiline_send(pos, itbl, send_warning),
string = {
byte = string.byte,
char = string.char,
format = string.format,
len = string.len,
lower = string.lower,
upper = string.upper,
rep = safe_string_rep,
reverse = string.reverse,
sub = string.sub,
find = safe_string_find,
},
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: lua_tube memory overflow. "..memsize_max.." bytes available, "
..#memstring.." required. Controller overheats.")
burn_controller(pos)
end
end
-- Returns success (boolean), errmsg (string), retval(any, return value of the user supplied code)
-- 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, "", nil end
if ignore_event(event, meta) then return true, "", nil 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, nil 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, nil end
if type(env.port) ~= "table" then
return false, "Ports set are invalid.", nil
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, nil
end
end
return true, warning, msg
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]"
.."style_type[label,textarea;font=mono]"
.."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, retval = run_inner(pos, code, event)
if not ok then
reset_meta(pos, code, errmsg)
else
reset_formspec(meta, code, errmsg)
end
return ok, errmsg, retval
end
local function reset(pos)
set_port_states(pos, {red = false, blue = false, yellow = false,
green = false, black = false, white = 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("pipeworks:lc_tube_interrupt", function (pos, luac_id, iid)
-- There is no lua_tube 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("pipeworks:lt_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_luatube, channel, msg)
end)
-----------------------
-- Node Registration --
-----------------------
local output_rules = {}
local input_rules = {}
local node_box = {
type = "fixed",
fixed = {
pipeworks.tube_leftstub[1], -- tube segment against -X face
pipeworks.tube_rightstub[1], -- tube segment against +X face
pipeworks.tube_bottomstub[1], -- tube segment against -Y face
pipeworks.tube_topstub[1], -- tube segment against +Y face
pipeworks.tube_frontstub[1], -- tube segment against -Z face
pipeworks.tube_backstub[1], -- tube segment against +Z face
}
}
local selection_box = {
type = "fixed",
fixed = pipeworks.tube_selectboxes,
}
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
},
wire = {
rules = pipeworks.digilines_rules
},
}
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
local function go_back(velocity)
local adjlist={{x=0,y=0,z=1},{x=0,y=0,z=-1},{x=0,y=1,z=0},{x=0,y=-1,z=0},{x=1,y=0,z=0},{x=-1,y=0,z=0}}
local speed = math.abs(velocity.x + velocity.y + velocity.z)
if speed == 0 then
speed = 1
end
local vel = {x = velocity.x/speed, y = velocity.y/speed, z = velocity.z/speed,speed=speed}
if speed >= 4.1 then
speed = 4
elseif speed >= 1.1 then
speed = speed - 0.1
else
speed = 1
end
vel.speed = speed
return pipeworks.notvel(adjlist, vel)
end
local tiles_base = {
"pipeworks_mese_tube_plain_4.png", "pipeworks_mese_tube_plain_3.png",
"pipeworks_mese_tube_plain_2.png", "pipeworks_mese_tube_plain_1.png",
"pipeworks_mese_tube_plain_6.png", "pipeworks_mese_tube_plain_5.png"}
local tiles_on_off = {
R__0 = "^pipeworks_lua_tube_port_%s.png",
R_90 = "^(pipeworks_lua_tube_port_%s.png^[transformR90)",
R180 = "^(pipeworks_lua_tube_port_%s.png^[transformR180)",
R270 = "^(pipeworks_lua_tube_port_%s.png^[transformR270)"
}
local texture_alpha_mode = minetest.features.use_texture_alpha_string_modes
and "clip" or true
for red = 0, 1 do -- 0 = off 1 = on
for blue = 0, 1 do
for yellow = 0, 1 do
for green = 0, 1 do
for black = 0, 1 do
for white = 0, 1 do
local cid = white..black..green..yellow..blue..red
local node_name = BASENAME..cid
local tiles = table.copy(tiles_base)
-- Red
tiles[1] = tiles[1]..tiles_on_off.R_90:format(red == 1 and "on" or "off");
tiles[2] = tiles[2]..tiles_on_off.R_90:format(red == 1 and "on" or "off");
tiles[5] = tiles[5]..tiles_on_off.R270:format(red == 1 and "on" or "off");
tiles[6] = tiles[6]..tiles_on_off.R_90:format(red == 1 and "on" or "off");
-- Blue
tiles[1] = tiles[1]..tiles_on_off.R270:format(blue == 1 and "on" or "off");
tiles[2] = tiles[2]..tiles_on_off.R270:format(blue == 1 and "on" or "off");
tiles[5] = tiles[5]..tiles_on_off.R_90:format(blue == 1 and "on" or "off");
tiles[6] = tiles[6]..tiles_on_off.R270:format(blue == 1 and "on" or "off");
-- Yellow
tiles[1] = tiles[1]..tiles_on_off.R180:format(yellow == 1 and "on" or "off");
tiles[2] = tiles[2]..tiles_on_off.R180:format(yellow == 1 and "on" or "off");
tiles[5] = tiles[5]..tiles_on_off.R180:format(yellow == 1 and "on" or "off");
tiles[6] = tiles[6]..tiles_on_off.R180:format(yellow == 1 and "on" or "off");
-- Green
tiles[3] = tiles[3]..tiles_on_off.R__0:format(green == 1 and "on" or "off");
tiles[4] = tiles[4]..tiles_on_off.R__0:format(green == 1 and "on" or "off");
tiles[5] = tiles[5]..tiles_on_off.R__0:format(green == 1 and "on" or "off");
tiles[6] = tiles[6]..tiles_on_off.R__0:format(green == 1 and "on" or "off");
-- Black
tiles[1] = tiles[1]..tiles_on_off.R180:format(black == 1 and "on" or "off");
tiles[2] = tiles[2]..tiles_on_off.R__0:format(black == 1 and "on" or "off");
tiles[3] = tiles[3]..tiles_on_off.R_90:format(black == 1 and "on" or "off");
tiles[4] = tiles[4]..tiles_on_off.R270:format(black == 1 and "on" or "off");
-- White
tiles[1] = tiles[1]..tiles_on_off.R__0:format(white == 1 and "on" or "off");
tiles[2] = tiles[2]..tiles_on_off.R180:format(white == 1 and "on" or "off");
tiles[3] = tiles[3]..tiles_on_off.R270:format(white == 1 and "on" or "off");
tiles[4] = tiles[4]..tiles_on_off.R_90:format(white == 1 and "on" or "off");
local groups = {snappy = 3, tube = 1, tubedevice = 1, overheat = 1, dig_generic = 4}
if red + blue + yellow + green + black + white ~= 0 then
groups.not_in_creative_inventory = 1
end
output_rules[cid] = {}
input_rules[cid] = {}
if red == 1 then table.insert(output_rules[cid], rules.red) end
if blue == 1 then table.insert(output_rules[cid], rules.blue) end
if yellow == 1 then table.insert(output_rules[cid], rules.yellow) end
if green == 1 then table.insert(output_rules[cid], rules.green) end
if black == 1 then table.insert(output_rules[cid], rules.black) end
if white == 1 then table.insert(output_rules[cid], rules.white) end
if red == 0 then table.insert( input_rules[cid], rules.red) end
if blue == 0 then table.insert( input_rules[cid], rules.blue) end
if yellow == 0 then table.insert( input_rules[cid], rules.yellow) end
if green == 0 then table.insert( input_rules[cid], rules.green) end
if black == 0 then table.insert( input_rules[cid], rules.black) end
if white == 0 then table.insert( input_rules[cid], rules.white) 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 = "Lua controlled Tube",
drawtype = "nodebox",
tiles = tiles,
use_texture_alpha = texture_alpha_mode,
paramtype = "light",
is_ground_content = false,
groups = groups,
drop = BASENAME.."000000",
sunlight_propagates = true,
selection_box = selection_box,
node_box = node_box,
on_construct = reset_meta,
on_receive_fields = on_receive_fields,
_sound_def = {
key = "node_sound_wood_defaults",
},
mesecons = mesecons,
digiline = digiline,
-- Virtual portstates are the ports that
-- the node shows as powered up (light up).
virtual_portstates = {
red = red == 1,
blue = blue == 1,
yellow = yellow == 1,
green = green == 1,
black = black == 1,
white = white == 1,
},
after_dig_node = function(pos, node)
mesecon.do_cooldown(pos)
mesecon.receptor_off(pos, output_rules)
pipeworks.after_dig(pos, node)
end,
is_luacontroller = true,
on_timer = node_timer,
tubelike = 1,
tube = {
connect_sides = {front = 1, back = 1, left = 1, right = 1, top = 1, bottom = 1},
priority = 50,
can_go = function(pos, node, velocity, stack)
local src = {name = nil}
-- add color of the incoming tube explicitly; referring to rules, in case they change later
for _, rule in pairs(rules) do
if (-velocity.x == rule.x and -velocity.y == rule.y and -velocity.z == rule.z) then
src.name = rule.name
break
end
end
local succ, _, msg = run(pos, {
type = "item",
pin = src,
itemstring = stack:to_string(),
item = stack:to_table(),
velocity = velocity,
})
if not succ or type(msg) ~= "string" then
return go_back(velocity)
end
local r = rules[msg]
return r and {r} or go_back(velocity)
end,
},
after_place_node = pipeworks.after_place,
on_blast = function(pos, intensity)
if not intensity or intensity > 1 + 3^0.5 then
minetest.remove_node(pos)
return
end
minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
pipeworks.scan_for_tube_objects(pos)
end,
})
end
end
end
end
end
end
pipeworks.ui_cat_tube_list[#pipeworks.ui_cat_tube_list+1] = BASENAME.."000000"
------------------------------------
-- Overheated Lua controlled Tube --
------------------------------------
local tiles_burnt = table.copy(tiles_base)
tiles_burnt[1] = tiles_burnt[1].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
tiles_burnt[2] = tiles_burnt[2].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
tiles_burnt[5] = tiles_burnt[5].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
tiles_burnt[6] = tiles_burnt[6].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
tiles_burnt[1] = tiles_burnt[1].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
tiles_burnt[2] = tiles_burnt[2].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
tiles_burnt[5] = tiles_burnt[5].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
tiles_burnt[6] = tiles_burnt[6].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
tiles_burnt[3] = tiles_burnt[3].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
tiles_burnt[4] = tiles_burnt[4].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
tiles_burnt[5] = tiles_burnt[5].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
tiles_burnt[6] = tiles_burnt[6].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
tiles_burnt[3] = tiles_burnt[3].."^pipeworks_lua_tube_port_burnt.png"
tiles_burnt[4] = tiles_burnt[4].."^pipeworks_lua_tube_port_burnt.png"
tiles_burnt[5] = tiles_burnt[5].."^pipeworks_lua_tube_port_burnt.png"
tiles_burnt[6] = tiles_burnt[6].."^pipeworks_lua_tube_port_burnt.png"
tiles_burnt[1] = tiles_burnt[1].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
tiles_burnt[2] = tiles_burnt[2].."^pipeworks_lua_tube_port_burnt.png"
tiles_burnt[3] = tiles_burnt[3].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
tiles_burnt[4] = tiles_burnt[4].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
tiles_burnt[1] = tiles_burnt[1].."^pipeworks_lua_tube_port_burnt.png"
tiles_burnt[2] = tiles_burnt[2].."^(pipeworks_lua_tube_port_burnt.png^[transformR180)"
tiles_burnt[3] = tiles_burnt[3].."^(pipeworks_lua_tube_port_burnt.png^[transformR270)"
tiles_burnt[4] = tiles_burnt[4].."^(pipeworks_lua_tube_port_burnt.png^[transformR90)"
minetest.register_node(BASENAME .. "_burnt", {
drawtype = "nodebox",
tiles = tiles_burnt,
use_texture_alpha = texture_alpha_mode,
is_burnt = true,
paramtype = "light",
is_ground_content = false,
groups = {snappy = 3, tube = 1, tubedevice = 1, not_in_creative_inventory=1, dig_generic = 4},
drop = BASENAME.."000000",
sunlight_propagates = true,
selection_box = selection_box,
node_box = node_box,
on_construct = reset_meta,
on_receive_fields = on_receive_fields,
_sound_def = {
key = "node_sound_wood_defaults",
},
virtual_portstates = {red = false, blue = false, yellow = false,
green = false, black = false, white = false},
mesecons = {
effector = {
rules = mesecon.rules.alldirs,
action_change = function(pos, _, rule_name, new_state)
update_real_port_states(pos, rule_name, new_state)
end,
},
},
tubelike = 1,
tube = {
connect_sides = {front = 1, back = 1, left = 1, right = 1, top = 1, bottom = 1},
priority = 50,
},
after_place_node = pipeworks.after_place,
after_dig_node = pipeworks.after_dig,
on_blast = function(pos, intensity)
if not intensity or intensity > 1 + 3^0.5 then
minetest.remove_node(pos)
return
end
minetest.swap_node(pos, {name = "pipeworks:broken_tube_1"})
pipeworks.scan_for_tube_objects(pos)
end,
})
------------------------
-- Craft Registration --
------------------------
minetest.register_craft({
type = "shapeless",
output = BASENAME.."000000",
recipe = {"pipeworks:mese_tube_000000", "mesecons_luacontroller:luacontroller0000"},
})