701 lines
22 KiB
Lua
701 lines
22 KiB
Lua
-- ANTI CHEAT by rnd
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-- Copyright 2016 rnd
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-- includes modified/bugfixed spectator mod by jp
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-------------------------------------------------------------------------
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-- This program is free software: you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation, either version 3 of the License, or
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-- (at your option) any later version.
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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-- You should have received a copy of the GNU General Public License
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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-------------------------------------------------------------------------
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local cheat = {};
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local version = "09/08/2017";
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anticheatsettings = {};
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dofile(minetest.get_modpath("anticheat").."/settings.lua")
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local CHEAT_TIMESTEP = anticheatsettings.CHEAT_TIMESTEP;
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local CHECK_AGAIN = anticheatsettings.CHECK_AGAIN;
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cheat.moderators = anticheatsettings.moderators;
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anticheatdb = {}; -- data about detected cheaters
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cheat.suspect = "";
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cheat.players = {}; -- temporary cheat detection db
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cheat.message = "";
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cheat.debuglist = {}; -- [name]=true -- who gets to see debug msgs
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cheat.scan_timer = 0; -- global scan of players
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cheat.stat_timer = 0; -- used to collect stats
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cheat.nodelist = {};
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cheat.watcher = {}; -- list of watchers
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cheat.timestep = CHEAT_TIMESTEP;
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-- list of forbidden nodes
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cheat.nodelist = {["default:stone"] = false, ["default:cobble"]= false, ["default:dirt"] = false, ["default:sand"]=false,["default:tree"]= false};
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local punish_cheat = function(name)
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local player = minetest.get_player_by_name(name);
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local ip = tostring(minetest.get_player_ip(name));
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if not player then return end
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local text=""; local logtext = "";
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if cheat.players[name].cheattype == 1 then
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text = "#anticheat: ".. name .. " was caught walking inside wall";
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logtext = os.date("%H:%M.%S").." #anticheat: ".. name .. " was caught walking inside wall at " .. minetest.pos_to_string(cheat.players[name].cheatpos);
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player:set_hp(0);
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elseif cheat.players[name].cheattype == 2 then
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local gravity = player:get_physics_override().gravity; if gravity<1 then return end
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logtext= os.date("%H:%M.%S").." #anticheat: ".. name .. " was caught flying at " .. minetest.pos_to_string(cheat.players[name].cheatpos);
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if cheat.players[name].cheatpos.y>5 then -- only above height 5 it directly damages flyer
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text = "#anticheat: ".. name .. " was caught flying";
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--player:set_hp(0);
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end
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end
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if text~="" then
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minetest.chat_send_all(text);
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end
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if logtext~="" then
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minetest.log("action", logtext);
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cheat.message = logtext;
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anticheatdb[ip] = {name = name, msg = logtext};
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cheat.players[name].count=0; -- reset counter
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cheat.players[name].cheattype = 0;
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for name,_ in pairs(cheat.moderators) do -- display full message to moderators
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minetest.chat_send_player(name,logtext);
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end
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end
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end
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-- CHECKS
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-- DETAILED NOCLIP CHECK
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local check_noclip = function(pos)
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local nodename = minetest.get_node(pos).name;
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local clear=true;
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if nodename ~= "air" then -- check if forbidden material!
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clear = cheat.nodelist[nodename]; -- test clip violation
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if clear == nil then clear = true end
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end
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if not clear then -- more detailed check
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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"});
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if #anodes == 0 then return false end
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clear=true;
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end
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return clear;
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end
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-- DETAILED FLY CHECK
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local check_fly = function(pos) -- return true if player not flying
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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
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if not fly then return true end;
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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"});
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if #anodes == 18 then -- player standing on air?
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return false
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else
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return true
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end
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end
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local round = function (x)
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if x > 0 then
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return math.floor(x+0.5)
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else
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return -math.floor(-x+0.5)
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end
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end
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--main check routine
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local check_player = function(player)
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local name = player:get_player_name();
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local privs = minetest.get_player_privs(name).kick;if privs then return end -- dont check moderators
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if cheat.watcher[name] then return end -- skip checking watchers while they watch
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local pos = player:getpos(); -- feet position
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pos.x = round(pos.x*10)/10;pos.z = round(pos.z*10)/10; -- less useless clutter
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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
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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
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local nodename = minetest.get_node(pos).name;
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local clear=true;
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if nodename ~= "air" then -- check if forbidden material!
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clear = cheat.nodelist[nodename]; -- test clip violation
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if clear == nil then clear = true end
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end
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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
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if cheat.players[name].count == 0 then -- player hasnt "cheated" yet, remember last clear position
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cheat.players[name].clearpos = cheat.players[name].lastpos
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end
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-- manage noclip cheats
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if not clear then -- player caught inside walls
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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);
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if moved then -- if player stands still whole time do nothing
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if cheat.players[name].count == 0 then cheat.players[name].cheatpos = pos end -- remember first position where player found inside wall
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if cheat.players[name].count == 0 then
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minetest.after(CHECK_AGAIN+math.random(5),
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function()
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cheat.players[name].count = 0;
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if not check_noclip(pos) then
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punish_cheat(name)-- we got a cheater!
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else
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cheat.players[name].count = 0; -- reset
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cheat.players[name].cheattype = 0;
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end
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end
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)
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end
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if cheat.players[name].count == 0 then -- mark as suspect
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cheat.players[name].count = 1;
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cheat.players[name].cheattype = 1;
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end
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end
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end
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-- manage flyers
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if fly then
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local fpos;
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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
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if fly then -- so we are in air, are we flying?
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if player:get_player_control().sneak then -- player sneaks, maybe on border?
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--search 18 nodes to find non air
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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"});
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if #anodes < 18 then fly = false end
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end -- if at this point fly = true means player is not standing on border
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if pos.y>=cheat.players[name].lastpos.y and fly then -- we actually didnt go down from last time and not on border
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-- was lastpos in air too?
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local lastpos = cheat.players[name].lastpos;
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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"});
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if #anodes == 18 then fly = true else fly = false end
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if fly then -- so now in air above previous position, which was in air too?
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if cheat.players[name].count == 0 then cheat.players[name].cheatpos = pos end -- remember first position where player found "cheating"
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if cheat.players[name].count == 0 then
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minetest.after(CHECK_AGAIN,
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function()
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cheat.players[name].count = 0;
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if not check_fly(pos) then
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punish_cheat(name)-- we got a cheater!
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else
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cheat.players[name].count = 0;
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cheat.players[name].cheattype = 0;
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end
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end
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)
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end
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if cheat.players[name].count == 0 then -- mark as suspect
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cheat.players[name].count = 1;
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cheat.players[name].cheattype = 2;
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end
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end
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end
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end
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end
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cheat.players[name].lastpos = pos
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end
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minetest.register_globalstep(function(dtime)
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cheat.scan_timer = cheat.scan_timer + dtime
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-- GENERAL SCAN OF ALL PLAYERS
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if cheat.scan_timer>cheat.timestep then
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cheat.stat_timer = cheat.stat_timer + cheat.timestep;
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-- dig xp stats every 2 minutes
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if boneworld and cheat.stat_timer>120 then
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cheat.stat_timer = 0;
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local players = minetest.get_connected_players();
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for _,player in pairs(players) do
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local pname = player:get_player_name();
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if cheat.players[pname].stats.state == 1 then -- only if dig xp loaded to prevent anomalous stats
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if boneworld.digxp[pname] then
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local deltadig = cheat.players[pname].stats.digxp;
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cheat.players[pname].stats.digxp = boneworld.digxp[pname];
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deltadig = boneworld.digxp[pname]-deltadig;
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cheat.players[pname].stats.deltadig = deltadig;
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if deltadig>cheat.players[pname].stats.maxdeltadig then
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cheat.players[pname].stats.maxdeltadig = deltadig;
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end
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if deltadig>2 then -- unnaturally high deltadig
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local ip = tostring(minetest.get_player_ip(pname));
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local logtext = os.date("%H:%M.%S") .. " #anticheat: " .. pname .. " (ip " .. ip .. ") is mining resources too fast, deltadig " .. deltadig;
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anticheatdb[ip] = {name = pname, msg = logtext};
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minetest.log("action", logtext);
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end
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end
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end
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end
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end
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cheat.timestep = CHEAT_TIMESTEP + (2*math.random()-1)*2; -- randomize step so its unpredictable
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cheat.scan_timer=0;
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--local t = minetest.get_gametime();
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local players = minetest.get_connected_players();
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for _,player in pairs(players) do
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check_player(player);
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end
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for name,_ in pairs(cheat.debuglist) do -- show suspects in debug
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for _,player in pairs(players) do
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local pname = player:get_player_name();
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if cheat.players[pname].count>0 then
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minetest.chat_send_player(name, "name " .. pname .. ", cheat pos " .. minetest.pos_to_string(cheat.players[pname].cheatpos) .. " last clear pos " .. minetest.pos_to_string(cheat.players[pname].clearpos) .. " cheat type " .. cheat.players[pname].cheattype .. " cheatcount " .. cheat.players[pname].count );
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end
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end
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end
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end
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end)
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-- long range dig check
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local check_can_dig = function(pos, digger)
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local p = digger:getpos();
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if p.y<0 then p.y=p.y+2 else p.y=p.y+1 end -- head position
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local dist = math.max(math.abs(p.x-pos.x),math.abs(p.y-pos.y),math.abs(p.z-pos.z));
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if dist>6 then -- here 5
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dist = math.floor(dist*100)/100;
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local pname = digger:get_player_name();
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local logtext = os.date("%H:%M.%S") .. "#anticheat: long range dig " .. pname ..", distance " .. dist .. ", pos " .. minetest.pos_to_string(pos);
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for name,_ in pairs(cheat.debuglist) do -- show to all watchers
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minetest.chat_send_player(name,logtext)
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end
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local ip = tostring(minetest.get_player_ip(pname));
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anticheatdb[ip] = {name = pname, msg = logtext};
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return false
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end
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return true
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end
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local set_check_can_dig = function(name)
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local tabl = minetest.registered_nodes[name];
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if not tabl then return end
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tabl.can_dig = check_can_dig;
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minetest.override_item(name, {can_dig = check_can_dig})
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--minetest.register_node(":"..name, tabl);
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end
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minetest.after(0,
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function()
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set_check_can_dig("default:stone");
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set_check_can_dig("default:stone_with_iron");
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set_check_can_dig("default:stone_with_copper");
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set_check_can_dig("default:stone_with_coal");
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set_check_can_dig("default:stone_with_gold");
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set_check_can_dig("default:stone_with_mese");
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set_check_can_dig("default:stone_with_diamond");
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end
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)
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-- DISABLED: lot of false positives
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-- collects misc stats on players
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-- minetest.register_on_cheat(
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-- function(player, c)
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-- local name = player:get_player_name(); if name == nil then return end
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-- local stats = cheat.players[name].stats;
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-- if not stats[c.type] then stats[c.type] = 0 end
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-- stats[c.type]=stats[c.type]+1;
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-- end
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-- )
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local watchers = {}; -- for each player a list of watchers
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minetest.register_on_joinplayer(function(player) -- init stuff on player join
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local name = player:get_player_name(); if name == nil then return end
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local pos = player:getpos();
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if cheat.players[name] == nil then
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cheat.players[name]={count=0,cheatpos = pos, clearpos = pos, lastpos = pos, cheattype = 0}; -- type 0: none, 1 noclip, 2 fly
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end
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if cheat.players[name] and cheat.players[name].stats == nil then
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cheat.players[name].stats = {maxdeltadig=0,deltadig = 0,digxp = 0, state = 0}; -- various statistics about player: max dig xp increase in 2 minutes, current dig xp increase
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minetest.after(5, -- load digxp after boneworld loads it
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function()
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if boneworld and boneworld.xp then
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cheat.players[name].stats.digxp = boneworld.digxp[name] or 0;
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cheat.players[name].stats.state = 1;
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end
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end
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)
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end
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--state 0 = stats not loaded yet
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watchers[name] = {}; -- for spectator mod
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local ip = tostring(minetest.get_player_ip(name));
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local msg = "";
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-- check anticheat db
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--check ip
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if anticheatdb[ip] then
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msg = "#anticheat: welcome back detected cheater, ip = " .. ip .. ", name " .. anticheatdb[ip].name .. ", new name = " .. name;
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end;
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--check names
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for ip,v in pairs(anticheatdb) do
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if v.name == name then
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msg = "#anticheat: welcome back detected cheater, ip = " .. ip .. ", name = newname = " .. v.name;
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break;
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end
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end
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if msg~="" then
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for name,_ in pairs(cheat.moderators) do
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minetest.chat_send_player(name,msg);
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end
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end
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end)
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minetest.register_chatcommand("cchk", {
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privs = {
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interact = true
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},
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description = "cchk NAME, checks if player is cheating in this moment",
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func = function(name, param)
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local privs = minetest.get_player_privs(name).privs;
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if not cheat.moderators[name] and not privs then return end
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local player = minetest.get_player_by_name(param);
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if not player then return end
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check_player(player);
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local players = minetest.get_connected_players();
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for name,_ in pairs(cheat.debuglist) do -- show suspects in debug
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for _,player in pairs(players) do
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local pname = player:get_player_name();
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if cheat.players[pname].count>0 then
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minetest.chat_send_player(name, "name " .. pname .. ", cheat pos " .. minetest.pos_to_string(cheat.players[pname].cheatpos) .. " last clear pos " .. minetest.pos_to_string(cheat.players[pname].clearpos) .. " cheat type " .. cheat.players[pname].cheattype .. " cheatcount " .. cheat.players[pname].count );
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end
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end
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end
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end
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})
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minetest.register_chatcommand("crep", { -- see cheat report
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privs = {
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interact = true
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},
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description = "crep 0/1, 0 = default cheat report, 1 = connected player stats",
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func = function(name, param)
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local privs = minetest.get_player_privs(name).privs;
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if not cheat.moderators[name] and not privs then return end
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if param == "" then
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minetest.chat_send_player(name,"use: crep type, types: 0(default) cheat report, 1 connected player stats (".. version ..")");
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end
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param = tonumber(param) or 0;
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if param == 0 then -- show cheat report
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local text = "";
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for ip,v in pairs(anticheatdb) do
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if v and v.name and v.msg then
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text = text .. "ip " .. ip .. " ".. v.msg .. "\n";
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end
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end
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if text ~= "" then
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local form = "size [6,7] textarea[0,0;6.5,8.5;creport;CHEAT REPORT;".. text.."]"
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minetest.show_formspec(name, "anticheatreport", form)
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end
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elseif param == 1 then -- show cheat stats
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|
local text = "";
|
|
local players = minetest.get_connected_players();
|
|
for _,player in pairs(players) do
|
|
local pname = player:get_player_name();
|
|
local ip = tostring(minetest.get_player_ip(pname));
|
|
|
|
|
|
text = text .. "\nname " .. pname .. ", digxp " .. math.floor(1000*cheat.players[pname].stats.digxp)/1000 ..
|
|
", deltadigxp(2min) " .. math.floor(1000*cheat.players[pname].stats.deltadig)/1000 .. ", maxdeltadigxp " .. math.floor(1000*cheat.players[pname].stats.maxdeltadig)/1000; -- .. " ".. string.gsub(dump(cheat.players[pname].stats), "\n", " ");
|
|
if anticheatdb[ip] then text = text .. " (DETECTED) ip ".. ip .. ", name " .. anticheatdb[ip].name end
|
|
end
|
|
if text ~= "" then
|
|
local form = "size [10,8] textarea[0,0;10.5,9.;creport;CHEAT STATISTICS;".. text.."]"
|
|
minetest.show_formspec(name, "anticheatreport", form)
|
|
end
|
|
end
|
|
-- suspects info
|
|
local players = minetest.get_connected_players();
|
|
for _,player in pairs(players) do
|
|
local pname = player:get_player_name();
|
|
if cheat.players[pname].count>0 then
|
|
minetest.chat_send_player(name, "name " .. pname .. ", cheat pos " .. minetest.pos_to_string(cheat.players[pname].cheatpos) .. " last clear pos " .. minetest.pos_to_string(cheat.players[pname].lastpos) .. " cheat type " .. cheat.players[pname].cheattype .. " cheatcount " .. cheat.players[pname].count );
|
|
end
|
|
end
|
|
|
|
end
|
|
})
|
|
|
|
minetest.register_chatcommand("cdebug", { -- toggle cdebug= display of stats on/off for this player
|
|
privs = {
|
|
interact = true
|
|
},
|
|
func = function(name, param)
|
|
local privs = minetest.get_player_privs(name).privs;
|
|
if not cheat.moderators[name] and not privs then return end
|
|
|
|
if cheat.debuglist[name] == nil then cheat.debuglist[name] = true else cheat.debuglist[name] = nil end;
|
|
|
|
minetest.chat_send_player(name,"#anticheat: " .. version);
|
|
if cheat.debuglist[name]==true then
|
|
minetest.chat_send_player(name,"#anticheat: display of debug messages is ON");
|
|
else
|
|
minetest.chat_send_player(name,"#anticheat: display of debug messages is OFF");
|
|
end
|
|
end
|
|
})
|
|
|
|
|
|
|
|
|
|
------------------------------------------------------
|
|
-- [Mod] Spectator Mode [git] [spectator_mode]
|
|
-- https://github.com/minetest-mods/spectator_mode
|
|
-- by jp » Tue Dec 08, 2015 15:34
|
|
-- modified/bugfixes by rnd
|
|
------------------------------------------------------
|
|
|
|
|
|
local original_pos = {}
|
|
|
|
local function unwatching(name)
|
|
local watcher = minetest.get_player_by_name(name)
|
|
local privs = minetest.get_player_privs(name)
|
|
|
|
if watcher and default.player_attached[name] == true then
|
|
watcher:set_detach()
|
|
|
|
|
|
local pos = original_pos[watcher]
|
|
if pos then
|
|
-- setpos seems to be very unreliable
|
|
-- this workaround helps though
|
|
minetest.after(0.1, function()
|
|
watcher:setpos(pos)
|
|
end)
|
|
original_pos[watcher] = nil
|
|
end
|
|
cheat.watcher[name]=nil;
|
|
|
|
minetest.after(5,
|
|
function()
|
|
default.player_attached[name] = false
|
|
watcher:set_eye_offset({x=0, y=0, z=0}, {x=0, y=0, z=0})
|
|
watcher:set_nametag_attributes({color = {a=255, r=255, g=255, b=255}})
|
|
|
|
watcher:hud_set_flags({
|
|
healthbar = true,
|
|
minimap = true,
|
|
breathbar = true,
|
|
hotbar = true,
|
|
wielditem = true,
|
|
crosshair = true
|
|
})
|
|
|
|
watcher:set_properties({
|
|
visual_size = {x=1, y=1},
|
|
makes_footstep_sound = true,
|
|
collisionbox = {-0.3, -1, -0.3, 0.3, 1, 0.3}
|
|
})
|
|
end
|
|
)
|
|
-- if not privs.interact and cheat.moderators[name] == true then
|
|
-- privs.interact = true
|
|
-- minetest.set_player_privs(name, privs)
|
|
-- end
|
|
|
|
|
|
|
|
end
|
|
end
|
|
|
|
minetest.register_chatcommand("watch", {
|
|
params = "<to_name>",
|
|
description = " - spectate what player is doing, stop with /unwatch",
|
|
privs = {interact=true},
|
|
func = function(name, param)
|
|
|
|
local privs = minetest.get_player_privs(name)
|
|
if not cheat.moderators[name] and not privs.kick then return end
|
|
local watcher = minetest.get_player_by_name(name)
|
|
|
|
|
|
if param == "" then -- no name given - select a suspect automatically
|
|
local players = minetest.get_connected_players();
|
|
for _,player in pairs(players) do
|
|
local pname = player:get_player_name();
|
|
if cheat.players[pname].count>0 then
|
|
param = pname;
|
|
cheat.suspect = param;
|
|
break;
|
|
end
|
|
end
|
|
if param == "" and cheat.suspect~="" then param = cheat.suspect end -- if none found watch last suspect
|
|
end
|
|
|
|
local target = minetest.get_player_by_name(param);
|
|
|
|
if not target then return end
|
|
if not cheat.players[param] then return end
|
|
|
|
|
|
local canwatch = false;
|
|
for ip,v in pairs(anticheatdb) do
|
|
if v.name == param then
|
|
canwatch = true;
|
|
break;
|
|
end
|
|
end
|
|
|
|
local ip = tostring(minetest.get_player_ip(param));
|
|
if anticheatdb[ip] then canwatch = true end -- can watch since this ip was detected before
|
|
|
|
|
|
if canwatch or cheat.players[param].count>0 or param == cheat.suspect or privs.kick then
|
|
else
|
|
minetest.chat_send_player(name, "ordinary watchers can only watch cheat suspects of detected cheaters");
|
|
return
|
|
end
|
|
|
|
if target and watcher ~= target then
|
|
if default.player_attached[name] == true then
|
|
unwatching(param)
|
|
else
|
|
original_pos[watcher] = watcher:getpos()
|
|
end
|
|
|
|
-- show inventory
|
|
local tinv = target:get_inventory():get_list("main");
|
|
for i,v in pairs(tinv) do tinv[i] = v:to_string(); end
|
|
tinv = dump(tinv);
|
|
local form = "size [6,7] textarea[0,0;6.5,8.5;creport;INVENTORY LIST;".. minetest.formspec_escape(tinv).."]"
|
|
minetest.show_formspec(name, "watch_inventory", form)
|
|
|
|
|
|
default.player_attached[name] = true
|
|
watcher:set_attach(target, "", {x=0, y=-5, z=-20}, {x=0, y=0, z=0})
|
|
watcher:set_eye_offset({x=0, y=-5, z=-20}, {x=0, y=0, z=0})
|
|
watcher:set_nametag_attributes({color = {a=0}})
|
|
|
|
watcher:hud_set_flags({
|
|
healthbar = false,
|
|
minimap = false,
|
|
breathbar = false,
|
|
hotbar = false,
|
|
wielditem = false,
|
|
crosshair = false
|
|
})
|
|
|
|
watcher:set_properties({
|
|
visual_size = {x=0, y=0},
|
|
makes_footstep_sound = false,
|
|
collisionbox = {0}
|
|
})
|
|
|
|
-- privs.interact = nil
|
|
-- minetest.set_player_privs(name, privs)
|
|
|
|
cheat.watcher[name]=true;
|
|
watchers[param][name] = true; -- register name as watcher of param
|
|
|
|
|
|
return true, "Watching '"..param.."' at "..minetest.pos_to_string(vector.round(target:getpos()))
|
|
end
|
|
|
|
return false, "Invalid parameter ('"..param.."')."
|
|
end
|
|
})
|
|
|
|
minetest.register_chatcommand("unwatch", {
|
|
description = "",
|
|
privs = {interact=true},
|
|
func = function(name, param)
|
|
unwatching(name)
|
|
-- unregister name as watcher
|
|
for pname,val in pairs (watchers) do
|
|
if val[name] then watchers[pname][name] = nil; end
|
|
end
|
|
|
|
end
|
|
})
|
|
|
|
minetest.register_on_leaveplayer(function(player)
|
|
local name = player:get_player_name()
|
|
if watchers[name] then
|
|
for pname,_ in pairs (watchers[name]) do --xxx
|
|
unwatching(pname); -- all watchers do /unwatch
|
|
end
|
|
end
|
|
watchers[name] = nil;
|
|
end) |