model+apps: Replace AppFace with AppFaceModel and relevant changes in ndn::App

Change-Id: I59faedaadf9d054ae22d813a4ce41f1f30b9321c
Refs: #3560
diff --git a/model/ndn-app-link-service.hpp b/model/ndn-app-link-service.hpp
new file mode 100644
index 0000000..798ac1a
--- /dev/null
+++ b/model/ndn-app-link-service.hpp
@@ -0,0 +1,86 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2011-2015  Regents of the University of California.
+ *
+ * This file is part of ndnSIM. See AUTHORS for complete list of ndnSIM authors and
+ * contributors.
+ *
+ * ndnSIM 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.
+ *
+ * ndnSIM 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
+ * ndnSIM, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#ifndef NDN_APP_LINK_SERVICE_HPP
+#define NDN_APP_LINK_SERVICE_HPP
+
+#include "ns3/ndnSIM/model/ndn-common.hpp"
+#include "ns3/ndnSIM/NFD/daemon/face/link-service.hpp"
+
+namespace ns3 {
+
+class Packet;
+class Node;
+
+namespace ndn {
+
+class App;
+
+/**
+ * \ingroup ndn-face
+ * \brief Implementation of LinkService for ndnSIM application
+ *
+ * \see NetDeviceLinkService
+ */
+class AppLinkService : public nfd::face::LinkService
+{
+public:
+  /**
+   * \brief Default constructor
+   */
+  AppLinkService(Ptr<App> app);
+
+  virtual ~AppLinkService();
+
+public:
+  void
+  onReceiveInterest(const Interest& interest);
+
+  void
+  onReceiveData(const Data& data);
+
+  void
+  onReceiveNack(const lp::Nack& nack);
+
+private:
+  virtual void
+  doSendInterest(const Interest& interest) override;
+
+  virtual void
+  doSendData(const Data& data) override;
+
+  virtual void
+  doSendNack(const lp::Nack& nack) override;
+
+  virtual void
+  doReceivePacket(nfd::face::Transport::Packet&& packet) override
+  {
+    // does nothing (all operations for now handled by LinkService)
+    BOOST_ASSERT(false);
+  }
+
+private:
+  Ptr<Node> m_node;
+  Ptr<App> m_app;
+};
+
+} // namespace ndn
+} // namespace ns3
+
+#endif // NDN_APP_LINK_SERVICE_HPP