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- -- LGPL
- --[[
- -- DO NOT INCLUDE THIS WITH SOURCES
- -- THIS will produce anticheat_routines.bin.
- -- instructions:
- -- 1. uncomment in init.lua around line 80:
- -- dofile(minetest.get_modpath("anticheat").."/anticheat_source.lua")
- -- just run server and .bin is generated. Then comment it again.
- -- how to use in code(already done):
- -- local anticheat_routines=loadfile(minetest.get_modpath("anticheat").."/anticheat_routines.bin")
- -- check_noclip, check_fly, check_player = anticheat_routines(minetest,cheat);
- -- Localize for performance.
- local math_floor = math.floor
- local anticheat_routines = function(minetest,cheat, CHECK_AGAIN, punish_cheat)
- -- DETAILED NOCLIP CHECK
- local check_noclip = function(pos)
- local nodename = minetest.get_node(pos).name;
- local clear=true;
- if nodename ~= "air" then -- check if forbidden material!
- clear = cheat.nodelist[nodename]; -- test clip violation
- if clear == nil then clear = true end
- end
- if not clear then -- more detailed check
- local anodes = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y-1, z=pos.z-1}, {x=pos.x+1, y=pos.y+1, z=pos.z+1}, {"air"});
- if #anodes == 0 then return false end
- clear=true;
- end
- return clear;
- end
- -- DETAILED FLY CHECK
- local check_fly = function(pos) -- return true if player not flying
- local fly = (minetest.get_node(pos).name=="air" and minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z}).name=="air"); -- prerequisite for flying is this to be "air", but not sufficient condition
- if not fly then return true end;
- local anodes = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y-1, z=pos.z-1}, {x=pos.x+1, y=pos.y, z=pos.z+1}, {"air"});
- if #anodes == 18 then -- player standing on air?
- return false
- else
- return true
- end
- end
- local round = function (x)
- if x > 0 then
- return math_floor(x+0.5)
- else
- return -math_floor(-x+0.5)
- end
- end
- --main check routine
- local check_player = function(player)
- local name = player:get_player_name();
- local privs = minetest.get_player_privs(name).kick;if privs then return end -- dont check moderators
- if cheat.watcher[name] then return end -- skip checking watchers while they watch
- local pos = player:getpos(); -- feet position
- pos.x = round(pos.x*10)/10;pos.z = round(pos.z*10)/10; -- less useless clutter
- pos.y = round(pos.y*10)/10; -- minetest buggy collision - need to do this or it returns wrong materials for feet position: aka magic number 0.498?????228
- if pos.y<0 then pos.y=pos.y+1 end -- weird, without this it fails to check feet block where y<0, it checks one below feet
- local nodename = minetest.get_node(pos).name;
- local clear=true;
- if nodename ~= "air" then -- check if forbidden material!
- clear = cheat.nodelist[nodename]; -- test clip violation
- if clear == nil then clear = true end
- end
- local fly = (nodename=="air" and minetest.get_node({x=pos.x,y=pos.y-1,z=pos.z}).name=="air"); -- prerequisite for flying, but not sufficient condition
- if cheat.players[name].count == 0 then -- player hasnt "cheated" yet, remember last clear position
- cheat.players[name].clearpos = cheat.players[name].lastpos
- end
- -- manage noclip cheats
- if not clear then -- player caught inside walls
- local moved = (cheat.players[name].lastpos.x~=pos.x) or (cheat.players[name].lastpos.y~=pos.y) or (cheat.players[name].lastpos.z~=pos.z);
- if moved then -- if player stands still whole time do nothing
- if cheat.players[name].count == 0 then cheat.players[name].cheatpos = pos end -- remember first position where player found inside wall
- if cheat.players[name].count == 0 then
- minetest.after(CHECK_AGAIN,
- function()
- cheat.players[name].count = 0;
- if not check_noclip(pos) then
- punish_cheat(name)-- we got a cheater!
- else
- cheat.players[name].count = 0; -- reset
- cheat.players[name].cheattype = 0;
- end
- end
- )
- end
- if cheat.players[name].count == 0 then -- mark as suspect
- cheat.players[name].count = 1;
- cheat.players[name].cheattype = 1;
- end
- end
- end
- -- manage flyers
- if fly then
- local fpos;
- fly,fpos = minetest.line_of_sight(pos, {x = pos.x, y = pos.y - 4, z = pos.z}, 1); --checking node maximal jump height below feet
- if fly then -- so we are in air, are we flying?
- if player:get_player_control().sneak then -- player sneaks, maybe on border?
- --search 18 nodes to find non air
- local anodes = minetest.find_nodes_in_area({x=pos.x-1, y=pos.y-1, z=pos.z-1}, {x=pos.x+1, y=pos.y, z=pos.z+1}, {"air"});
- if #anodes < 18 then fly = false end
- end -- if at this point fly = true means player is not standing on border
- if pos.y>=cheat.players[name].lastpos.y and fly then -- we actually didnt go down from last time and not on border
- -- was lastpos in air too?
- local lastpos = cheat.players[name].lastpos;
- local anodes = minetest.find_nodes_in_area({x=lastpos.x-1, y=lastpos.y-1, z=lastpos.z-1}, {x=lastpos.x+1, y=lastpos.y, z=lastpos.z+1}, {"air"});
- if #anodes == 18 then fly = true else fly = false end
- if fly then -- so now in air above previous position, which was in air too?
- if cheat.players[name].count == 0 then cheat.players[name].cheatpos = pos end -- remember first position where player found "cheating"
- if cheat.players[name].count == 0 then
- minetest.after(CHECK_AGAIN,
- function()
- cheat.players[name].count = 0;
- if not check_fly(pos) then
- punish_cheat(name)-- we got a cheater!
- else
- cheat.players[name].count = 0;
- cheat.players[name].cheattype = 0;
- end
- end
- )
- end
- if cheat.players[name].count == 0 then -- mark as suspect
- cheat.players[name].count = 1;
- cheat.players[name].cheattype = 2;
- end
- end
- end
- end
- end
- cheat.players[name].lastpos = pos
- end
- return check_noclip, check_fly, check_player;
- end
- -- this produces compiled version of source
- local out = io.open(minetest.get_modpath("anticheat").."\\anticheat_routines.bin", "wb");
- local s = string.dump(anticheat_routines);
- out:write(s);
- out:close()
- --]]
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