mgmt refactoring: Refactor InternalFace

InternalFace is now exclusively for internal use by NFD's forwarding
pipelines.  A separate InternalClientFace has been introduced, intended
to be used by the NFD internal applications, including FIB, Face, RIB
manager, and others.

Change-Id: I4a06b9d05b1613a456c6267582091924557d73be
Refs: #2107
diff --git a/daemon/face/internal-client-face.hpp b/daemon/face/internal-client-face.hpp
new file mode 100644
index 0000000..8eb3c46
--- /dev/null
+++ b/daemon/face/internal-client-face.hpp
@@ -0,0 +1,118 @@
+/* -*- 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_INTERNAL_CLIENT_FACE_HPP
+#define NFD_DAEMON_FACE_INTERNAL_CLIENT_FACE_HPP
+
+#include "common.hpp"
+
+#include <ndn-cxx/face.hpp>
+#include <ndn-cxx/security/key-chain.hpp>
+#include <ndn-cxx/transport/transport.hpp>
+
+namespace nfd {
+
+class InternalFace;
+class InternalClientFace;
+
+shared_ptr<InternalClientFace>
+makeInternalClientFace(const shared_ptr<InternalFace>& face, ndn::KeyChain& keyChain);
+
+/** \brief a client face that is connected to NFD InternalFace
+ */
+class InternalClientFace : public ndn::Face
+{
+public:
+  template<typename Packet>
+  void
+  receive(const Packet& packet);
+
+private:
+  class Transport : public ndn::Transport
+  {
+  public:
+    signal::Signal<Transport, Block> onSendBlock;
+
+    void
+    receive(const Block& block);
+
+    virtual void
+    close() DECL_OVERRIDE;
+
+    virtual void
+    send(const Block& wire) DECL_OVERRIDE;
+
+    virtual void
+    send(const Block& header, const Block& payload) DECL_OVERRIDE;
+
+    virtual void
+    pause() DECL_OVERRIDE;
+
+    virtual void
+    resume() DECL_OVERRIDE;
+  };
+
+private:
+  InternalClientFace(const shared_ptr<InternalFace>& face,
+                     const shared_ptr<InternalClientFace::Transport>& transport,
+                     ndn::KeyChain& keyChain);
+
+  void
+  construct();
+
+  friend shared_ptr<InternalClientFace>
+  makeInternalClientFace(const shared_ptr<InternalFace>& face,
+                         ndn::KeyChain& keyChain);
+
+private:
+  shared_ptr<InternalFace> m_face;
+  shared_ptr<InternalClientFace::Transport> m_transport;
+};
+
+template<typename Packet>
+void
+InternalClientFace::receive(const Packet& packet)
+{
+  if (!packet.getLocalControlHeader().empty(ndn::nfd::LocalControlHeader::ENCODE_ALL)) {
+
+    Block header = packet.getLocalControlHeader()
+                         .wireEncode(packet, ndn::nfd::LocalControlHeader::ENCODE_ALL);
+    Block payload = packet.wireEncode();
+
+    ndn::EncodingBuffer encoder(header.size() + payload.size(),
+                                header.size() + payload.size());
+    encoder.appendByteArray(header.wire(), header.size());
+    encoder.appendByteArray(payload.wire(), payload.size());
+
+    m_transport->receive(encoder.block());
+  }
+  else {
+    m_transport->receive(packet.wireEncode());
+  }
+}
+
+} // namespace nfd
+
+#endif // NFD_DAEMON_FACE_INTERNAL_CLIENT_FACE_HPP