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-face.cpp b/daemon/face/internal-face.cpp
new file mode 100644
index 0000000..c5ab2ca
--- /dev/null
+++ b/daemon/face/internal-face.cpp
@@ -0,0 +1,93 @@
+/* -*- 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/>.
+ */
+
+#include "internal-face.hpp"
+
+namespace nfd {
+
+InternalFace::InternalFace()
+  : Face(FaceUri("internal://"), FaceUri("internal://"), true)
+{
+}
+
+void
+InternalFace::sendInterest(const Interest& interest)
+{
+  this->emitSignal(onSendInterest, interest);
+}
+
+void
+InternalFace::sendData(const Data& data)
+{
+  this->emitSignal(onSendData, data);
+}
+
+void
+InternalFace::close()
+{
+}
+
+void
+InternalFace::receive(const Block& blockFromClient)
+{
+  const Block& payLoad = ndn::nfd::LocalControlHeader::getPayload(blockFromClient);
+  if (payLoad.type() == ndn::tlv::Interest) {
+    receiveInterest(*extractPacketFromBlock<Interest>(blockFromClient, payLoad));
+  }
+  else if (payLoad.type() == ndn::tlv::Data) {
+    receiveData(*extractPacketFromBlock<Data>(blockFromClient, payLoad));
+  }
+}
+
+void
+InternalFace::receiveInterest(const Interest& interest)
+{
+  this->emitSignal(onReceiveInterest, interest);
+}
+
+void
+InternalFace::receiveData(const Data& data)
+{
+  this->emitSignal(onReceiveData, data);
+}
+
+template<typename Packet>
+shared_ptr<Packet>
+InternalFace::extractPacketFromBlock(const Block& blockFromClient, const Block& payLoad)
+{
+  auto packet = make_shared<Packet>(payLoad);
+  if (&payLoad != &blockFromClient) {
+    packet->getLocalControlHeader().wireDecode(blockFromClient);
+  }
+  return packet;
+}
+
+template shared_ptr<Interest>
+InternalFace::extractPacketFromBlock<Interest>(const Block& blockFromClient, const Block& payLoad);
+
+template shared_ptr<Data>
+InternalFace::extractPacketFromBlock<Data>(const Block& blockFromClient, const Block& payLoad);
+
+} // namespace nfd