Rebase signal master to current GIT

signalmaster/.jshintrc

@@ -6,8 +6,9 @@
     "evil": true,
     "white": true,
     "undef": true,
-    "node": true,
+    "browser": true,
     "predef": [
+        "app",
         "$",
         "FormBot",
         "socket",

signalmaster/Procfile

@@ -0,0 +1 @@
+web: node server.js

signalmaster/README.md

@@ -4,7 +4,9 @@ A simple signaling server for clients to connect and do signaling for WebRTC.
 
 Specifically created as a default connection point for [SimpleWebRTC.js](https://github.com/HenrikJoreteg/SimpleWebRTC)
 
+It also supports vending STUN/TURN servers with the shared secret mechanism as described in [this draft](http://tools.ietf.org/html/draft-uberti-behave-turn-rest-00).
+
 Read more: 
  - [Introducing SimpleWebRTC and conversat.io](http://blog.andyet.com/2013/feb/22/introducing-simplewebrtcjs-and-conversatio/)
  - [SimpleWebRTC.com](http://simplewebrtc.com)
- - [conversat.io](http://conversat.io)
+ - [talky.io](https://talky.io)

signalmaster/dev_config.json.sample

@@ -1,8 +1,17 @@
 {
     "isDev": false,
+    "logLevel": 3,
     "server": {
         "port": 8888
     },
+    /*"stunservers" : [
+        {"url": "stun:stun.l.google.com:19302"}
+    ],
+    "turnservers" : [
+        { "url": "turn:your.turn.server.here",
+          "secret": "turnserversharedsecret"
+          "expiry": 86400 }
+    ]*/
     "mysql": {
         "server": "localhost",
         "database": "vroom",

signalmaster/package.json

@@ -1,21 +1,17 @@
 {
   "name": "signal-master",
-  "version": "0.0.1",
-  "repository": {
-    "type": "git", 
-    "url": "git@github.com:andyet/signal-master.git"
-  },
-  "description": "Mind-meldification for teams",
+  "description": "Simple signaling server for SimpleWebRTC",
+  "version": "0.1.0",
   "dependencies": {
-    "async": "0.1.9",
+    "getconfig": "0.3.0",
     "node-uuid": "1.2.0",
-    "redis": "",
-    "underscore": "",
-    "precommit-hook": "",
-    "getconfig": "",
-    "socket.io": "",
+    "socket.io": "0.9.16",
     "mysql": "",
     "cookie": ""
   },
-  "main": "server.js"
+  "main": "server.js",
+  "repository": {
+    "type": "git",
+    "url": "git@github.com:andyet/signal-master.git"
+  }
 }

signalmaster/server.js

@@ -3,7 +3,9 @@ var config = require('getconfig'),
     uuid = require('node-uuid'),
     mysql = require('mysql'),
     cookie_reader = require('cookie'),
-    io = require('socket.io').listen(config.server.port);
+    crypto = require('crypto'),
+    port = parseInt(process.env.PORT || config.server.port, 10),
+    io = require('socket.io').listen(port);
 
 var sql = mysql.createConnection({
   host     : config.mysql.server,
@@ -11,6 +13,11 @@ var sql = mysql.createConnection({
   user     : config.mysql.user,
   password : config.mysql.password});
 
+if (config.logLevel) {
+    // https://github.com/Automattic/socket.io/wiki/Configuring-Socket.IO
+    io.set('log level', config.logLevel);
+}
+
 function describeRoom(name) {
     var clients = io.sockets.clients(name);
     var result = {
@@ -94,24 +101,30 @@ io.sockets.on('connection', function (client) {
 
     client.on('unshareScreen', function (type) {
         client.resources.screen = false;
-        if (client.room) removeFeed('screen');
+        removeFeed('screen');
     });
 
     client.on('join', join);
 
     function removeFeed(type) {
+        if (client.room) {
             io.sockets.in(client.room).emit('remove', {
                 id: client.id,
                 type: type
             });
+            if (!type) {
+                client.leave(client.room);
+                client.room = undefined;
+            }
+        }
     }
 
     function join(name, cb) {
         // sanity check
         if (typeof name !== 'string') return;
         // leave any existing rooms
-        if (client.room) removeFeed();
-        safeCb(cb)(null, describeRoom(name))
+        removeFeed();
+        safeCb(cb)(null, describeRoom(name));
         client.join(name);
         client.room = name;
     }
@@ -121,7 +134,9 @@ io.sockets.on('connection', function (client) {
     client.on('disconnect', function () {
         removeFeed();
     });
-    client.on('leave', removeFeed);
+    client.on('leave', function () {
+        removeFeed();
+    });
 
     client.on('create', function (name, cb) {
         if (arguments.length == 2) {
@@ -139,7 +154,29 @@ io.sockets.on('connection', function (client) {
             safeCb(cb)(null, name);
         }
     });
+
+    // tell client about stun and turn servers and generate nonces
+    if (config.stunservers) {
+        client.emit('stunservers', config.stunservers);
+    }
+    if (config.turnservers) {
+        // create shared secret nonces for TURN authentication
+        // the process is described in draft-uberti-behave-turn-rest
+        var credentials = [];
+        config.turnservers.forEach(function (server) {
+            var hmac = crypto.createHmac('sha1', server.secret);
+            // default to 86400 seconds timeout unless specified
+            var username = Math.floor(new Date().getTime() / 1000) + (server.expiry || 86400) + "";
+            hmac.update(username);
+            credentials.push({
+                username: username,
+                credential: hmac.digest('base64'),
+                url: server.url
+            });
+        });
+        client.emit('turnservers', credentials);
+    }
 });
 
 if (config.uid) process.setuid(config.uid);
-console.log('signal master is running at: http://localhost:' + config.server.port);
+console.log('signal master is running at: http://localhost:' + port);