rib: limit route prefix length in rib/register command
refs #4262
Change-Id: I567934419f6872cb0f5a823400f53014b9c6e85e
diff --git a/core/fib-max-depth.hpp b/core/fib-max-depth.hpp
new file mode 100644
index 0000000..af15a97
--- /dev/null
+++ b/core/fib-max-depth.hpp
@@ -0,0 +1,37 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2018, 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_CORE_FIB_MAX_DEPTH_HPP
+#define NFD_CORE_FIB_MAX_DEPTH_HPP
+
+namespace nfd {
+
+/** \brief Maximum number of components in a FIB entry prefix.
+ */
+static const int FIB_MAX_DEPTH = 32;
+
+} // namespace nfd
+
+#endif // NFD_CORE_FIB_MAX_DEPTH_HPP