From f79a9f14dc463e3099a4e8dd34808ca0aa3ac620 Mon Sep 17 00:00:00 2001 From: AJ ONeal Date: Tue, 27 Sep 2016 17:56:06 -0400 Subject: [PATCH] muxing ws --- mux-ws.js | 212 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 212 insertions(+) create mode 100644 mux-ws.js diff --git a/mux-ws.js b/mux-ws.js new file mode 100644 index 0000000..5dd7be8 --- /dev/null +++ b/mux-ws.js @@ -0,0 +1,212 @@ +'use strict'; + +var net = require('net'); +var tls = require('tls'); +var http = require('http'); +var sni = require('sni'); +var url = require('url'); +var jwt = require('jsonwebtoken'); +//var packer = require('tunnel-packer'); +//var Transform = require('stream').Transform; +var tlsOpts = require('localhost.daplie.com-certificates').merge({}); +var Duplex = require('stream').Duplex; +var WebSocketServer = require('ws').Server; + +require('cluster-store').create().then(function (store) { + var remotes = {}; + var selfname = 'pokemap.hellabit.com'; + var secret = 'shhhhh'; + + var httpServer = http.createServer(function (req, res) { + res.end('Hello, World!'); + }); + var wss = new WebSocketServer({ server: httpServer }); + var tcp3000 = net.createServer(); + + wss.on('connection', function connection(ws) { + var location = url.parse(ws.upgradeReq.url, true); + //var token = jwt.decode(location.query.access_token); + var token = jwt.verify(location.query.access_token, secret); + + if (!token) { + ws.send({ error: { message: "invalid access token", code: "E_INVALID_TOKEN" } }); + ws.close(); + return; + } + + if (!token.name) { + ws.send({ error: { message: "invalid server name", code: "E_INVALID_NAME" } }); + ws.close(); + return; + } + + ws.on('close', function () { + console.log("TODO cleanup"); + }); + + remotes[token.name] = remotes[token.name] || {}; + // TODO allow more than one remote per servername + remotes[token.name].ws = ws; + // TODO allow tls to be decrypted by server if client is actually a browser + // and we haven't implemented tls in the browser yet + remotes[token.name].decrypt = token.decrypt; + // TODO how to allow a child process to communicate with this one? + remotes[token.name].handle = { address: null, handle: null }; + store.set(token.name, remotes[token.name].handle); + }); + + + tcp3000.listen(3000, function () { + console.log('listening on 3000'); + }); + + + var tls3000 = tls.createServer(tlsOpts, function (tlsSocket) { + httpServer.emit('connection', tlsSocket); + /* + tlsSocket.on('data', function (chunk) { + console.log('chunk', chunk.byteLength); + }); + */ + }); + + var Dup = { + write: function (chunk, encoding, cb) { + //console.log('_write', chunk.byteLength); + this.__my_socket.write(chunk, encoding); + cb(); + } + , read: function (size) { + //console.log('_read'); + var x = this.__my_socket.read(size); + if (x) { + console.log('_read', size); + this.push(x); + } + } + }; + + tcp3000.on('connection', function (socket) { + // this works when I put it here, but I don't know if it's tls yet here + // httpsServer.emit('connection', socket); + //tls3000.emit('connection', socket); + + //var tlsSocket = new tls.TLSSocket(socket, { secureContext: tls.createSecureContext(tlsOpts) }); + //tlsSocket.on('data', function (chunk) { + // console.log('dummy', chunk.byteLength); + //}); + + //return; + socket.once('data', function (firstChunk) { + // BUG XXX: this assumes that the packet won't be chunked smaller + // than the 'hello' or the point of the 'Host' header. + // This is fairly reasonable, but there are edge cases where + // it does not hold (such as manual debugging with telnet) + // and so it should be fixed at some point in the future + + // defer after return (instead of being in many places) + process.nextTick(function () { + socket.unshift(firstChunk); + }); + + var service = 'tcp'; + var servername; + var str; + var m; + + function connectHttps() { + // none of these methods work: + // httpsServer.emit('connection', socket); // this didn't work + // tlsServer.emit('connection', socket); // this didn't work either + //console.log('chunkLen', firstChunk.byteLength); + + var myDuplex = new Duplex(); + + myDuplex.__my_socket = socket; + myDuplex._write = Dup.write; + myDuplex._read = Dup.read; + socket.on('data', function (chunk) { + //console.log('[' + Date.now() + '] socket data', chunk.byteLength); + myDuplex.push(chunk); + }); + + tls3000.emit('connection', myDuplex); + } + + function pipeWs(socket, ws) { + socket.on('data', function (chunk) { + // TODO XXX pack + // var chunk = socket.read(); + ws.send(chunk, { binary: true }); + }); + ws.on('message', function (chunk) { + // TODO XXX pack + socket.write(chunk); + }); + } + + function tryTls() { + if (!servername || selfname === servername) { + connectHttps(); + return; + } + + if (remotes[servername]) { + pipeWs(socket, remotes[servername].ws); + return; + } + + store.get(servername, function (remote) { + if (!remote) { + connectHttps(); + return; + } + + if (!remote.address) { + console.error("connecting to a socket in a sibling process is not yet implemented"); + connectHttps(); + return; + } + + console.error("connecting to a socket in a sibling process is not yet implemented"); + connectHttps(); + }); + } + + // https://github.com/mscdex/httpolyglot/issues/3#issuecomment-173680155 + if (22 === firstChunk[0]) { + // TLS + service = 'https'; + servername = (sni(firstChunk)||'').toLowerCase(); + tryTls(); + return; + } + + if (firstChunk[0] > 32 && firstChunk[0] < 127) { + str = firstChunk.toString(); + m = str.match(/^Host: ([^\r\n]+)[\r\n]+/); + servername = m && m[1].toLowerCase() || ''; + if (/HTTP\//i.test(str)) { + service = 'http'; + if (/\/\.well-known\//.test(str)) { + // HTTP + httpServer.emit('connection', socket); + } + else { + // redirect to https + httpServer.emit('connection', socket); + } + return; + } + } + + console.error("Got unexpected connection", str); + socket.write(JSON.stringify({ error: { + message: "not sure what you were trying to do there..." + , code: 'E_INVALID_PROTOCOL' } + })); + socket.end(); + }); + + }); +});