rib: Generate FIB updates using route flags

refs: #1325

Change-Id: I5c567da1c06819caeba5cc5b024914666ba70ab6
diff --git a/rib/fib-update.hpp b/rib/fib-update.hpp
new file mode 100644
index 0000000..02713ab
--- /dev/null
+++ b/rib/fib-update.hpp
@@ -0,0 +1,90 @@
+/* -*- 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_RIB_FIB_UPDATE_HPP
+#define NFD_RIB_FIB_UPDATE_HPP
+
+#include "common.hpp"
+
+namespace nfd {
+namespace rib {
+
+/** \class FibUpdate
+ *  \brief represents a FIB update
+ */
+class FibUpdate
+{
+public:
+  FibUpdate()
+    : faceId(0)
+    , cost(0)
+  {
+  }
+
+  static shared_ptr<FibUpdate>
+  createAddUpdate(const Name& name, const uint64_t faceId, const uint64_t cost);
+
+  static shared_ptr<FibUpdate>
+  createRemoveUpdate(const Name& name, const uint64_t faceId);
+
+  enum Action
+  {
+    ADD_NEXTHOP    = 0,
+    REMOVE_NEXTHOP = 1
+  };
+
+public:
+  Name name;
+  uint64_t faceId;
+  uint64_t cost;
+  Action action;
+};
+
+inline std::ostream&
+operator<<(std::ostream& os, const FibUpdate& update)
+{
+  os << "FibUpdate("
+     << " Name: " << update.name << ", "
+     << "faceId: " << update.faceId << ", ";
+
+  if (update.action == FibUpdate::ADD_NEXTHOP)
+    {
+      os << "cost: " << update.cost << ", "
+         << "action: ADD_NEXTHOP";
+    }
+  else
+    {
+      os << "action: REMOVE_NEXTHOP";
+    }
+
+  os << ")";
+
+  return os;
+}
+
+} // namespace rib
+} // namespace nfd
+
+#endif // NFD_RIB_FIB_UPDATE_HPP