face: WebSocketTransport

Change-Id: I28db9cd6f828e4a9fe5895bb7a6152cca5baa9fc
Refs: #3169, #3160
diff --git a/daemon/face/websocket-transport.hpp b/daemon/face/websocket-transport.hpp
new file mode 100644
index 0000000..6bfbdc3
--- /dev/null
+++ b/daemon/face/websocket-transport.hpp
@@ -0,0 +1,88 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2015,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_DAEMON_FACE_WEBSOCKET_TRANSPORT_HPP
+#define NFD_DAEMON_FACE_WEBSOCKET_TRANSPORT_HPP
+
+#include "transport.hpp"
+#include "websocketpp.hpp"
+#include "core/scheduler.hpp"
+
+namespace nfd {
+namespace face {
+
+/**
+ * \brief A Transport that communicates on a WebSocket connection
+ */
+class WebSocketTransport : public Transport
+{
+public:
+  WebSocketTransport(websocketpp::connection_hdl hdl,
+                     websocket::Server& server,
+                     time::milliseconds pingInterval);
+
+  /** \brief Translates a message into a Block
+   *         and delivers it to the link service
+   */
+  void
+  receiveMessage(const std::string& msg);
+
+  void
+  handlePong();
+
+  void
+  handlePongTimeout();
+
+protected:
+  virtual void
+  beforeChangePersistency(ndn::nfd::FacePersistency newPersistency) DECL_OVERRIDE;
+
+  virtual void
+  doClose() DECL_OVERRIDE;
+
+private:
+  virtual void
+  doSend(Transport::Packet&& packet) DECL_OVERRIDE;
+
+  void
+  schedulePing();
+
+  void
+  sendPing();
+
+  void
+  processErrorCode(const websocketpp::lib::error_code& error);
+
+private:
+  websocketpp::connection_hdl m_handle;
+  websocket::Server& m_server;
+  time::milliseconds m_pingInterval;
+  scheduler::ScopedEventId m_pingEventId;
+};
+
+} // namespace face
+} // namespace nfd
+
+#endif // NFD_DAEMON_FACE_WEBSOCKET_TRANSPORT_HPP