/*

 * This file is part of PowerDNS or dnsdist.

 * Copyright -- PowerDNS.COM B.V. and its contributors

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * In addition, for the avoidance of any doubt, permission is granted to

 * link this program with OpenSSL and to (re)distribute the binaries

 * produced as the result of such linking.

 *

 * This program 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 this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

#pragma once

#include <array>

#include <cstdint>

#include <string>

namespace dnsdist

{

class Protocol

{

public:

  enum typeenum : uint8_t

  {

    DoUDP = 0,

    DoTCP,

    DNSCryptUDP,

    DNSCryptTCP,

    DoT,

    DoH,

    DoQ,

    DoH3

  };

  Protocol(typeenum protocol = DoUDP) :

    d_protocol(protocol)

  {

    if (protocol >= s_names.size()) {

      throw std::runtime_error("Unknown protocol: '" + std::to_string(protocol) + "'");

    }

  }

  explicit Protocol(const std::string& protocol);

  bool operator==(typeenum) const;

  bool operator!=(typeenum) const;

  bool operator==(const Protocol& rhs) const;

  bool operator!=(const Protocol& rhs) const;

  const std::string& toString() const;

  const std::string& toPrettyString() const;

  bool isUDP() const;

  bool isEncrypted() const;

  uint8_t toNumber() const;

private:

  typeenum d_protocol;

  static constexpr size_t s_numberOfProtocols = 8;

  static const std::array<std::string, s_numberOfProtocols> s_names;

  static const std::array<std::string, s_numberOfProtocols> s_prettyNames;

};

}