1 import { Server as TrackerServer } from 'bittorrent-tracker'
2 import express from 'express'
3 import { createServer } from 'http'
4 import proxyAddr from 'proxy-addr'
5 import { WebSocketServer } from 'ws'
6 import { Redis } from '@server/lib/redis'
7 import { logger } from '../helpers/logger'
8 import { CONFIG } from '../initializers/config'
9 import { TRACKER_RATE_LIMITS } from '../initializers/constants'
10 import { VideoFileModel } from '../models/video/video-file'
11 import { VideoStreamingPlaylistModel } from '../models/video/video-streaming-playlist'
13 const trackerRouter = express.Router()
16 let peersIpInfoHash = {}
19 const trackerServer = new TrackerServer({
23 filter: async function (infoHash, params, cb) {
24 if (CONFIG.TRACKER.ENABLED === false) {
25 return cb(new Error('Tracker is disabled on this instance.'))
30 if (params.type === 'ws') {
33 ip = params.httpReq.ip
36 const key = ip + '-' + infoHash
38 peersIps[ip] = peersIps[ip] ? peersIps[ip] + 1 : 1
39 peersIpInfoHash[key] = peersIpInfoHash[key] ? peersIpInfoHash[key] + 1 : 1
41 if (CONFIG.TRACKER.REJECT_TOO_MANY_ANNOUNCES && peersIpInfoHash[key] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP_PER_INFOHASH) {
42 return cb(new Error(`Too many requests (${peersIpInfoHash[key]} of ip ${ip} for torrent ${infoHash}`))
46 if (CONFIG.TRACKER.PRIVATE === false) return cb()
48 const videoFileExists = await VideoFileModel.doesInfohashExistCached(infoHash)
49 if (videoFileExists === true) return cb()
51 const playlistExists = await VideoStreamingPlaylistModel.doesInfohashExistCached(infoHash)
52 if (playlistExists === true) return cb()
54 cb(new Error(`Unknown infoHash ${infoHash} requested by ip ${ip}`))
56 // Close socket connection and block IP for a few time
57 if (params.type === 'ws') {
58 Redis.Instance.setTrackerBlockIP(ip)
59 .catch(err => logger.error('Cannot set tracker block ip.', { err }))
61 // setTimeout to wait filter response
62 setTimeout(() => params.socket.close(), 0)
65 logger.error('Error in tracker filter.', { err })
71 if (CONFIG.TRACKER.ENABLED !== false) {
73 trackerServer.on('error', function (err) {
74 logger.error('Error in tracker.', { err })
77 trackerServer.on('warning', function (err) {
78 logger.warn('Warning in tracker.', { err })
82 const onHttpRequest = trackerServer.onHttpRequest.bind(trackerServer)
83 trackerRouter.get('/tracker/announce', (req, res) => onHttpRequest(req, res, { action: 'announce' }))
84 trackerRouter.get('/tracker/scrape', (req, res) => onHttpRequest(req, res, { action: 'scrape' }))
86 function createWebsocketTrackerServer (app: express.Application) {
87 const server = createServer(app)
88 const wss = new WebSocketServer({ noServer: true })
90 wss.on('connection', function (ws, req) {
91 ws['ip'] = proxyAddr(req, CONFIG.TRUST_PROXY)
93 trackerServer.onWebSocketConnection(ws)
96 server.on('upgrade', (request: express.Request, socket, head) => {
97 if (request.url === '/tracker/socket') {
98 const ip = proxyAddr(request, CONFIG.TRUST_PROXY)
100 Redis.Instance.doesTrackerBlockIPExist(ip)
102 if (result === true) {
103 logger.debug('Blocking IP %s from tracker.', ip)
105 socket.write('HTTP/1.1 403 Forbidden\r\n\r\n')
111 return wss.handleUpgrade(request, socket as any, head, ws => wss.emit('connection', ws, request))
113 .catch(err => logger.error('Cannot check if tracker block ip exists.', { err }))
116 // Don't destroy socket, we have Socket.IO too
122 // ---------------------------------------------------------------------------
126 createWebsocketTrackerServer
129 // ---------------------------------------------------------------------------
131 function runPeersChecker () {
133 logger.debug('Checking peers.')
135 for (const ip of Object.keys(peersIpInfoHash)) {
136 if (peersIps[ip] > TRACKER_RATE_LIMITS.ANNOUNCES_PER_IP) {
137 logger.warn('Peer %s made abnormal requests (%d).', ip, peersIps[ip])
143 }, TRACKER_RATE_LIMITS.INTERVAL)