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monitor.js
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monitor.js
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/**
* Monitor
* Pokemon Showdown - http://pokemonshowdown.com/
*
* Various utility functions to make sure PS is running healthily.
*
* @license MIT license
*/
'use strict';
const FS = require('./lib/fs');
const MONITOR_CLEAN_TIMEOUT = 2 * 60 * 60 * 1000;
/**
* This counts the number of times an action has been committed, and tracks the
* delta of time since the last time it was committed. Actions include
* connecting to the server, starting a battle, validating a team, and
* sending/receiving data over a connection's socket.
* @augments {Map<string, [number, number]>}
*/
// @ts-ignore TypeScript bug
class TimedCounter extends Map {
/**
* Increments the number of times an action has been committed by one, and
* updates the delta of time since it was last committed.
*
* @param {string} key
* @param {number} timeLimit
* @return {[number, number]} - [action count, time delta]
*/
increment(key, timeLimit) {
let val = this.get(key);
let now = Date.now();
if (!val || now > val[1] + timeLimit) {
this.set(key, [1, Date.now()]);
return [1, 0];
} else {
val[0]++;
return [val[0], now - val[1]];
}
}
}
// Config.loglevel is:
// 0 = everything
// 1 = debug (same as 0 for now)
// 2 = notice (default)
// 3 = warning
// (4 is currently unused)
// 5 = supposedly completely silent, but for now a lot of PS output doesn't respect loglevel
if (('Config' in global) &&
(typeof Config.loglevel !== 'number' || Config.loglevel < 0 || Config.loglevel > 5)) {
Config.loglevel = 2;
}
// @ts-ignore
const Monitor = module.exports = {
/*********************************************************
* Logging
*********************************************************/
/** @param {Error} error */
crashlog(error, source = 'The main process') {
require('./lib/crashlogger')(error, source);
},
/**
* @param {string} text
*/
log(text) {
this.notice(text);
if (Rooms('staff')) {
Rooms('staff').add(`|c|~|${text}`).update();
}
},
/**
* @param {string} text
*/
adminlog(text) {
this.notice(text);
if (Rooms('upperstaff')) {
Rooms('upperstaff').add(`|c|~|${text}`).update();
}
},
/**
* @param {string} text
*/
logHTML(text) {
this.notice(text);
if (Rooms('staff')) {
Rooms('staff').add(`|html|${text}`).update();
}
},
/**
* @param {string} text
*/
debug(text) {
if (Config.loglevel <= 1) console.log(text);
},
/**
* @param {string} text
*/
warn(text) {
if (Config.loglevel <= 3) console.log(text);
},
/**
* @param {string} text
*/
notice(text) {
if (Config.loglevel <= 2) console.log(text);
},
/*********************************************************
* Resource Monitor
*********************************************************/
clean() {
this.clearNetworkUse();
this.battlePreps.clear();
this.battles.clear();
this.connections.clear();
Dnsbl.cache.clear();
},
connections: new TimedCounter(),
battles: new TimedCounter(),
battlePreps: new TimedCounter(),
groupChats: new TimedCounter(),
tickets: new TimedCounter(),
/** @type {string | null} */
activeIp: null,
networkUse: {},
networkCount: {},
hotpatchLock: {},
/**
* Counts a connection. Returns true if the connection should be terminated for abuse.
*
* @param {string} ip
* @param {string} [name = '']
* @return {boolean}
*/
countConnection(ip, name = '') {
let [count, duration] = this.connections.increment(ip, 30 * 60 * 1000);
if (count === 500) {
this.adminlog(`[ResourceMonitor] IP ${ip} banned for cflooding (${count} times in ${Chat.toDurationString(duration)}${name ? ': ' + name : ''})`);
return true;
}
if (count > 500) {
if (count % 500 === 0) {
let c = count / 500;
if (c === 2 || c === 4 || c === 10 || c === 20 || c % 40 === 0) {
this.adminlog(`[ResourceMonitor] IP ${ip} still cflooding (${count} times in ${Chat.toDurationString(duration)}${name ? ': ' + name : ''})`);
}
}
return true;
}
return false;
},
/**
* Counts battles created. Returns true if the connection should be
* terminated for abuse.
*
* @param {string} ip
* @param {string} [name = '']
* @return {boolean}
*/
countBattle(ip, name = '') {
let [count, duration] = this.battles.increment(ip, 30 * 60 * 1000);
if (duration < 5 * 60 * 1000 && count % 30 === 0) {
this.adminlog(`[ResourceMonitor] IP ${ip} has battled ${count} times in the last ${Chat.toDurationString(duration)}${name ? ': ' + name : ''})`);
return true;
}
if (count % 150 === 0) {
this.adminlog(`[ResourceMonitor] IP ${ip} has battled ${count} times in the last ${Chat.toDurationString(duration)}${name ? ': ' + name : ''}`);
return true;
}
return false;
},
/**
* Counts team validations. Returns true if too many.
*
* @param {string} ip
* @param {Connection} connection
* @return {boolean}
*/
countPrepBattle(ip, connection) {
let count = this.battlePreps.increment(ip, 3 * 60 * 1000)[0];
if (count <= 12) return false;
if (count < 120 && Punishments.sharedIps.has(ip)) return false;
connection.popup('Due to high load, you are limited to 12 battles and team validations every 3 minutes.');
return true;
},
/**
* Counts concurrent battles. Returns true if too many.
*
* @param {number} count
* @param {Connection} connection
* @return {boolean}
*/
countConcurrentBattle(count, connection) {
if (count <= 5) return false;
connection.popup(`Due to high load, you are limited to 5 games at the same time.`);
return true;
},
/**
* Counts group chat creation. Returns true if too much.
*
* @param {string} ip
* @return {boolean}
*/
countGroupChat(ip) {
let count = this.groupChats.increment(ip, 60 * 60 * 1000)[0];
return count > 4;
},
/**
* Counts ticket creation. Returns true if too much.
*
* @param {string} ip
* @return {boolean}
*/
countTickets(ip) {
let count = this.tickets.increment(ip, 60 * 60 * 1000)[0];
if (Punishments.sharedIps.has(ip) && count >= 50) return true;
if (count >= 5) return true;
return false;
},
/**
* Counts the data length received by the last connection to send a
* message, as well as the data length in the server's response.
*
* @param {number} size
*/
countNetworkUse(size) {
if (!Config.emergency || typeof this.activeIp !== 'string') return;
// @ts-ignore
if (this.activeIp in this.networkUse) {
// @ts-ignore
this.networkUse[this.activeIp] += size;
// @ts-ignore
this.networkCount[this.activeIp]++;
} else {
// @ts-ignore
this.networkUse[this.activeIp] = size;
// @ts-ignore
this.networkCount[this.activeIp] = 1;
}
},
writeNetworkUse() {
let buf = '';
for (let i in this.networkUse) {
buf += `${this.networkUse[i]}\t${this.networkCount[i]}\t${i}\n`;
}
FS('logs/networkuse.tsv').write(buf);
},
clearNetworkUse() {
if (Config.emergency) {
this.networkUse = {};
this.networkCount = {};
}
},
/**
* Counts roughly the size of an object to have an idea of the server load.
*
* @param {any} object
* @return {number}
*/
sizeOfObject(object) {
/** @type {Set<(Array | Object)>} */
let objectCache = new Set();
let stack = [object];
let bytes = 0;
while (stack.length) {
let value = stack.pop();
switch (typeof value) {
case 'boolean':
bytes += 4;
break;
case 'string':
bytes += value.length * 2;
break;
case 'number':
bytes += 8;
break;
case 'object':
if (!objectCache.has(value)) objectCache.add(value);
if (Array.isArray(value)) {
for (let el of value) stack.push(el);
} else {
for (let i in value) stack.push(value[i]);
}
break;
}
}
return bytes;
},
/** @type {{new(entries: [any, [number, number]]): TimedCounter}} */
TimedCounter,
};
Monitor.cleanInterval = setInterval(() => Monitor.clean(), MONITOR_CLEAN_TIMEOUT);