diff --git a/src/util/util.hpp b/src/util/util.hpp
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+++ b/src/util/util.hpp
@@ -0,0 +1,44 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014, Regents of the University of California.
+ *
+ * This file is part of NDNS (Named Data Networking Domain Name Service).
+ * See AUTHORS.md for complete list of NDNS authors and contributors.
+ *
+ * NDNS 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.
+ *
+ * NDNS 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
+ * NDNS, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NDNS_UTIL_UTIL_HPP
+#define NDNS_UTIL_UTIL_HPP
+
+namespace ndn {
+namespace ndns {
+
+NdnsType
+toNdnsType(const std::string& str)
+{
+  if (str == "resp")
+    return NDNS_RESP;
+  else if (str == "nack")
+    return NDNS_NACK;
+  else if (str == "auth")
+    return NDNS_AUTH;
+  else if (str == "raw")
+    return NDNS_RAW;
+  else
+    return NDNS_UNKNOWN;
+}
+
+} // namespace ndns
+} // namespace ndn
+
+#endif // NDNS_UTIL_UTIL_HPP