face: Refactor Face as LinkService+Transport

LpFace: new Face implementation
LpFaceWrapper: allows new Face system to work with old Face system

Eventually, LpFace will be renamed to Face and LpFaceWrapper will be removed.

refs #3088 #3179

Change-Id: Ia4ad7c84631e65b444d4f24e1d7593392927c8db
diff --git a/daemon/face/lp-face.cpp b/daemon/face/lp-face.cpp
new file mode 100644
index 0000000..0b2e826
--- /dev/null
+++ b/daemon/face/lp-face.cpp
@@ -0,0 +1,45 @@
+/* -*- 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 "lp-face.hpp"
+
+namespace nfd {
+namespace face {
+
+LpFace::LpFace(unique_ptr<LinkService> service, unique_ptr<Transport> transport)
+  : afterReceiveInterest(service->afterReceiveInterest)
+  , afterReceiveData(service->afterReceiveData)
+  , afterReceiveNack(service->afterReceiveNack)
+  , afterStateChange(transport->afterStateChange)
+  , m_id(INVALID_FACEID)
+  , m_service(std::move(service))
+  , m_transport(std::move(transport))
+{
+  m_service->setFaceAndTransport(*this, *m_transport);
+  m_transport->setFaceAndLinkService(*this, *m_service);
+}
+
+} // namespace face
+} // namespace nfd