diff --git a/libweave/src/privet/device_delegate.h b/libweave/src/privet/device_delegate.h
new file mode 100644
index 0000000..a125a61
--- /dev/null
+++ b/libweave/src/privet/device_delegate.h
@@ -0,0 +1,45 @@
+// Copyright 2014 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef LIBWEAVE_SRC_PRIVET_DEVICE_DELEGATE_H_
+#define LIBWEAVE_SRC_PRIVET_DEVICE_DELEGATE_H_
+
+#include <memory>
+#include <utility>
+
+#include <base/time/time.h>
+
+namespace privetd {
+
+// Interface to provide access to general information about device.
+class DeviceDelegate {
+ public:
+  DeviceDelegate();
+  virtual ~DeviceDelegate();
+
+  // Returns HTTP ports for Privet. The first one is the primary port,
+  // the second is the port for a pooling updates requests. The second value
+  // could be 0. In this case the first port would be use for regular and for
+  // updates requests.
+  virtual std::pair<uint16_t, uint16_t> GetHttpEnpoint() const = 0;
+
+  // The same |GetHttpEnpoint| but for HTTPS.
+  virtual std::pair<uint16_t, uint16_t> GetHttpsEnpoint() const = 0;
+
+  // Returns device update.
+  virtual base::TimeDelta GetUptime() const = 0;
+
+  // Updates the HTTP port value.
+  virtual void SetHttpPort(uint16_t port) = 0;
+
+  // Updates the HTTPS port value.
+  virtual void SetHttpsPort(uint16_t port) = 0;
+
+  // Create default instance.
+  static std::unique_ptr<DeviceDelegate> CreateDefault();
+};
+
+}  // namespace privetd
+
+#endif  // LIBWEAVE_SRC_PRIVET_DEVICE_DELEGATE_H_