tools: Add NDN-FCH stage (service to get "closest" NDN hub) to ndn-autoconfig

Change-Id: Ia2b0bf93d3d25b45713eeba58924e64871715bdb
Refs: #3800
diff --git a/tools/ndn-autoconfig/ndn-fch-discovery.hpp b/tools/ndn-autoconfig/ndn-fch-discovery.hpp
new file mode 100644
index 0000000..2e587c6
--- /dev/null
+++ b/tools/ndn-autoconfig/ndn-fch-discovery.hpp
@@ -0,0 +1,62 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2016,  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_TOOLS_NDN_AUTOCONFIG_NDN_FCH_DISCOVERY_HPP
+#define NFD_TOOLS_NDN_AUTOCONFIG_NDN_FCH_DISCOVERY_HPP
+
+#include "base-dns.hpp"
+
+namespace ndn {
+namespace tools {
+namespace autoconfig {
+
+/**
+ * @brief Discovery NDN hub using NDN-FCH protocol
+ *
+ * @see https://github.com/cawka/ndn-fch/blob/master/README.md
+ */
+class NdnFchDiscovery : public Base
+{
+public:
+  /**
+   * @brief Create stage to discover NDN hub using NDN-FCH protocol
+   * @sa Base::Base
+   */
+  NdnFchDiscovery(Face& face, KeyChain& keyChain,
+                  const std::string& url,
+                  const NextStageCallback& nextStageOnFailure);
+
+  void
+  start() override;
+
+private:
+  std::string m_url;
+};
+
+} // namespace autoconfig
+} // namespace tools
+} // namespace ndn
+
+#endif // NFD_TOOLS_NDN_AUTOCONFIG_NDN_FCH_DISCOVERY_HPP