new file mode 100644
--- /dev/null
+++ b/dom/bluetooth/BluetoothSocketObserver.h
@@ -0,0 +1,28 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_dom_bluetooth_BluetoothSocketObserver_h
+#define mozilla_dom_bluetooth_BluetoothSocketObserver_h
+
+#include "BluetoothCommon.h"
+#include <mozilla/ipc/UnixSocket.h>
+
+using namespace mozilla::ipc;
+
+BEGIN_BLUETOOTH_NAMESPACE
+
+class BluetoothSocketObserver
+{
+public:
+  virtual void ReceiveSocketData(nsAutoPtr<UnixSocketRawData>& aMessage) = 0;
+  virtual void OnConnectSuccess() = 0;
+  virtual void OnConnectError() = 0;
+  virtual void OnDisconnect() = 0;
+};
+
+END_BLUETOOTH_NAMESPACE
+
+#endif