/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2014-2017,  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_GUESS_FROM_SEARCH_DOMAINS_HPP
#define NFD_TOOLS_NDN_AUTOCONFIG_GUESS_FROM_SEARCH_DOMAINS_HPP

#include "stage.hpp"

namespace ndn {
namespace tools {
namespace autoconfig {

/**
 * @brief Guessing home router based on DNS query with default suffix
 *
 * - Request
 *
 *     The end host sends a DNS query that is equivalent to this command:
 *
 *         dig +search +short +cmd +tries=2 +ndots=10 _ndn._udp srv
 *
 * - Response
 *
 *     The DNS server should answer with an SRV record that contains the hostname and UDP port
 *     number of the NDN router.
 */
class GuessFromSearchDomains : public Stage
{
public:
  /**
   * @brief Create stage to guess home router based on DNS query with default suffix
   */
  GuessFromSearchDomains(Face& face, KeyChain& keyChain,
                         const NextStageCallback& nextStageOnFailure);

  void
  start() override;
};

} // namespace autoconfig
} // namespace tools
} // namespace ndn

#endif // NFD_TOOLS_NDN_AUTOCONFIG_GUESS_FROM_SEARCH_DOMAINS_HPP