add metadata support

src/main/base/castcontroller.js

@@ -0,0 +1,24 @@
+var util                      = require('util');
+var castv2Cli                 = require('castv2-client');
+var RequestResponseController = castv2Cli.RequestResponseController;
+
+function CiderCastController(client, sourceId, destinationId) {
+  RequestResponseController.call(this, client, sourceId, destinationId, 'urn:x-cast:com.ciderapp.customdata');
+  this.once('close', onclose);
+  var self = this;
+  function onclose() {
+    self.stop();
+  }
+}
+
+util.inherits(CiderCastController, RequestResponseController);
+
+CiderCastController.prototype.sendIp = function(ip) {
+  // TODO: Implement Callback
+  let data = {
+      ip : ip
+  }
+  this.request(data);
+};
+
+module.exports = CiderCastController;