tunnel via ws

package.json

@@ -23,6 +23,7 @@
   "dependencies": {
     "jsonwebtoken": "^7.1.9",
     "sni": "^1.0.0",
-    "tunnel-packer": "^1.0.0"
+    "tunnel-packer": "^1.0.0",
+    "ws": "^1.1.1"
   }
 }

wsclient.js

@@ -0,0 +1,151 @@
+(function () {
+'use strict';
+
+var net = require('net');
+var WebSocket = require('ws');
+var jwt = require('jsonwebtoken');
+var sni = require('sni');
+// TODO ask oauth3.org where to connect
+// TODO reconnect on disconnect
+
+// Assumption: will not get next tcp packet unless previous packet succeeded
+//var services = { 'ssh': 22, 'http': 80, 'https': 443 };
+var services = { 'ssh': 22, 'http': 4080, 'https': 8443 };
+var hostname = 'aj.daplie.me'; // 'pokemap.hellabit.com'
+
+function addrToId(address) {
+  return address.family + ',' + address.address + ',' + address.port;
+}
+
+/*
+function socketToAddr(socket) {
+  return { family: socket.remoteFamily, address: socket.remoteAddress, port: socket.remotePort };
+}
+
+function socketToId(socket) {
+  return addrToId(socketToAddr(socket));
+}
+*/
+
+var token = jwt.sign({ name: hostname }, 'shhhhh');
+
+/*
+var request = require('request');
+request.get('https://pokemap.hellabit.com:3000?access_token=' + token, { rejectUnauthorized: false }, function (err, resp) {
+  console.log('resp.body');
+  console.log(resp.body);
+});
+
+return;
+//*/
+
+var wstunneler = new WebSocket('wss://pokemap.hellabit.com:3000/?access_token=' + token, { rejectUnauthorized: false });
+wstunneler.on('open', function () {
+  console.log('[open] tunneler connected');
+  var localclients = {};
+
+  /*
+  setInterval(function () {
+    console.log('');
+    console.log('localclients.length:', Object.keys(localclients).length);
+    console.log('');
+  }, 5000);
+  */
+
+  //wstunneler.send(token);
+
+  // BaaS / Backendless / noBackend / horizon.io
+  // user authentication
+  // a place to store data
+  // file management
+  // Synergy Teamwork Paradigm = Jabberwocky
+  var pack = require('tunnel-packer').pack;
+
+  function onMessage(opts) {
+    var cid = addrToId(opts);
+    console.log('[wsclient] onMessage:', cid);
+    var service = opts.service;
+    var port = services[service];
+    var lclient;
+    var servername;
+    var str;
+    var m;
+
+    if (opts.data.byteLength < 20) {
+      if ('|__ERROR__|' === opts.data.toString('ascii')
+        || '|__END__|' === opts.data.toString('ascii')) {
+
+        console.log("['" + opts.data.toString('ascii') + "'] '" + cid + "'");
+        if (localclients[cid]) {
+          localclients[cid].end();
+          delete localclients[cid];
+        }
+        return;
+      }
+    }
+
+    function endWithError() {
+      wstunneler.send(pack(opts, Buffer.from('|__ERROR__|')), { binary: true });
+    }
+
+    if (localclients[cid]) {
+      console.log("[=>] received data from '" + cid + "' =>", opts.data.byteLength);
+      localclients[cid].write(opts.data);
+      return;
+    }
+    else if ('http' === service) {
+      str = opts.data.toString();
+      m = str.match(/(?:^|[\r\n])Host: ([^\r\n]+)[\r\n]*/im);
+      servername = (m && m[1].toLowerCase() || '').split(':')[0];
+    }
+    else if ('https' === service) {
+      servername = sni(opts.data);
+    }
+    else {
+      endWithError();
+      return;
+    }
+
+    if (!servername) {
+      console.warn("|__ERROR__| no servername found for '" + cid + "'");
+      console.warn(opts.data.toString());
+      wstunneler.send(pack(opts, Buffer.from('|__ERROR__|')), { binary: true });
+      return;
+    }
+
+    console.log("servername: '" + servername + "'");
+
+    lclient = localclients[cid] = net.createConnection({ port: port, host: '127.0.0.1' }, function () {
+
+      lclient.on('data', function (chunk) {
+        console.log("[<=] local '" + opts.service + "' sent to '" + cid + "' <= ", chunk.byteLength, "bytes");
+        console.log(JSON.stringify(chunk.toString()));
+        wstunneler.send(pack(opts, chunk), { binary: true });
+      });
+      lclient.on('error', function (err) {
+        console.error("[error] local '" + opts.service + "' '" + cid + "'");
+        console.error(err);
+        delete localclients[cid];
+        wstunneler.send(pack(opts, Buffer.from('|__ERROR__|')), { binary: true });
+      });
+      lclient.on('end', function () {
+        console.log("[end] local '" + opts.service + "' '" + cid + "'");
+        delete localclients[cid];
+        wstunneler.send(pack(opts, Buffer.from('|__END__|')), { binary: true });
+      });
+
+      console.log("[=>] first packet from tunneler to '" + cid + "' as '" + opts.service + "'", opts.data.byteLength);
+      lclient.write(opts.data);
+    });
+  }
+
+  var machine = require('tunnel-packer').create({ onMessage: onMessage });
+
+  wstunneler.on('message', machine.fns.addChunk);
+
+  wstunneler.on('close', function () {
+    console.log('end');
+  });
+});
+
+}());