minetest.register_privilege("whois", { description = "Allows player to see other player IPs"}) -- Created by Krock to stop mass-account-creators -- License: WTFPL ipnames = {} ipnames.data = {} ipnames.tmp_data = {} ipnames.changes = false ipnames.save_interval = 120 ipnames.save_time = 0 ipnames.file = minetest.get_worldpath().."/ipnames.txt" ipnames.name_per_ip_limit = tonumber(minetest.setting_get("max_names_per_ip")) or 5 -- Get accounts self: minetest.register_chatcommand("whois", { description = "Gets all players who have the same IP as the specified player", privs = {whois = true}, func = function(name, param) if not ipnames.data[param] then minetest.chat_send_player(name, "The player \"" .. param .. "\" did not join yet.") return end local ip = ipnames.data[param] local names = ""; for k, v in pairs(ipnames.data) do if v == ip then if names ~= "" then names = names .. ", " .. k else names = names .. " " .. k end end end minetest.chat_send_player(name, "Players for IP address " .. ip .. ": " .. names) end, }) -- Get IP if player tries to join, ban if there are too much names per IP: minetest.register_on_prejoinplayer(function(name, ip) -- Only stop new accounts: ipnames.tmp_data[name] = ip if not ipnames.data[name] then local count = 1 local names = "" for k, v in pairs(ipnames.data) do if v == ip then count = count + 1 names = names .. k .. ", " end end if count <= ipnames.name_per_ip_limit and count > 1 then minetest.log("action", name .. " now has " .. count .. " accounts. Other accounts: " .. names) end if count > ipnames.name_per_ip_limit then ipnames.tmp_data[name] = nil if tostring(ip) ~= "127.0.0.1" then return ("\nYou exceeded the limit of accounts (" .. ipnames.name_per_ip_limit .. ").\nYou already have the following accounts:\n" .. names) end end end end) -- Save IP if player joined: minetest.register_on_joinplayer(function(player) local name = player:get_player_name() ipnames.data[name] = ipnames.tmp_data[name] ipnames.tmp_data[name] = nil ipnames.changes = true end) function ipnames.load_data() local file = io.open(ipnames.file, "r") if not file then return end for line in file:lines() do if line ~= "" then local data = line:split("|") if #data >= 2 then ipnames.data[data[1]] = data[2] end end end io.close(file) end function ipnames.save_data() if not ipnames.changes then return end ipnames.changes = false local file = io.open(ipnames.file, "w") for i, v in pairs(ipnames.data) do if v ~= nil then file:write(i .. "|" .. v .. "\n") end end io.close(file) end minetest.register_globalstep(function(t) ipnames.save_time = ipnames.save_time + t if ipnames.save_time < ipnames.save_interval then return end ipnames.save_time = 0 ipnames.save_data() end) minetest.register_on_shutdown(function() ipnames.save_data() end) minetest.after(3, function() ipnames.load_data() end)