face: Implement WebSocket channel, face, and factory.
Change-Id: Ic4dbb1abdbbdbec028746ba14b11be8ab9cc1edb
Refs: #1468
diff --git a/daemon/face/websocket-channel.hpp b/daemon/face/websocket-channel.hpp
new file mode 100644
index 0000000..05d8f99
--- /dev/null
+++ b/daemon/face/websocket-channel.hpp
@@ -0,0 +1,122 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014 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_CHANNEL_HPP
+#define NFD_DAEMON_FACE_WEBSOCKET_CHANNEL_HPP
+
+#include "channel.hpp"
+#include "core/global-io.hpp"
+#include "core/scheduler.hpp"
+#include "websocket-face.hpp"
+
+namespace nfd {
+
+/**
+ * \brief Class implementing WebSocket-based channel to create faces
+ *
+ *
+ */
+class WebSocketChannel : public Channel
+{
+public:
+ /**
+ * \brief Exception of WebSocketChannel
+ */
+ class Error : public std::runtime_error
+ {
+ public:
+ explicit
+ Error(const std::string& what)
+ : runtime_error(what)
+ {
+ }
+ };
+
+ /**
+ * \brief Create WebSocket channel for the local endpoint
+ *
+ * To enable creation of faces upon incoming connections,
+ * one needs to explicitly call WebSocketChannel::listen method.
+ * The created socket is bound to the localEndpoint.
+ *
+ * \throw WebSocketChannel::Error if bind on the socket fails
+ */
+ explicit
+ WebSocketChannel(const websocket::Endpoint& localEndpoint);
+
+ virtual
+ ~WebSocketChannel();
+
+ /**
+ * \brief Enable listening on the local endpoint, accept connections,
+ * and create faces when remote host makes a connection
+ * \param onFaceCreated Callback to notify successful creation of the face
+ *
+ * \throws WebSocketChannel::Error if called multiple times
+ */
+ void
+ listen(const FaceCreatedCallback& onFaceCreated);
+
+ /**
+ * \brief Get number of faces in the channel
+ */
+ size_t
+ size() const;
+
+private:
+ void
+ handleMessage(websocketpp::connection_hdl hdl, websocket::Server::message_ptr msg);
+
+ void
+ handleOpen(websocketpp::connection_hdl hdl);
+
+ void
+ handleClose(websocketpp::connection_hdl hdl);
+
+private:
+ websocket::Endpoint m_localEndpoint;
+
+ websocket::Server m_server;
+
+ /**
+ * Callbacks for face creation.
+ * New communications are detected using async_receive_from.
+ * Its handler has a fixed signature. No space for the face callback
+ */
+ FaceCreatedCallback m_onFaceCreatedCallback;
+
+ typedef std::map< websocketpp::connection_hdl, shared_ptr<WebSocketFace> > ChannelFaceMap;
+ ChannelFaceMap m_channelFaces;
+
+ /**
+ * \brief If true, it means the function listen has already been called
+ */
+ bool m_isListening;
+
+};
+
+} // namespace nfd
+
+#endif // NFD_DAEMON_FACE_WEBSOCKET_CHANNEL_HPP