key-locator.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013-2018 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx library is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * ndn-cxx library 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 Lesser General Public License for more details.
 *
 * You should have received copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 */

#ifndef NDN_KEY_LOCATOR_HPP
#define NDN_KEY_LOCATOR_HPP

#include "ndn-cxx/name.hpp"
#include "ndn-cxx/encoding/encoding-buffer.hpp"

namespace ndn {

class KeyLocator
{
public:
  class Error : public tlv::Error
  {
  public:
    using tlv::Error::Error;
  };

  enum Type {
    KeyLocator_None = 65535,
    KeyLocator_Name = 0,
    KeyLocator_KeyDigest = 1,
    KeyLocator_Unknown = 255
  };

public: // constructors
  KeyLocator();

  explicit
  KeyLocator(const Block& wire);

  KeyLocator(const Name& name);

public: // encode and decode
  template<encoding::Tag TAG>
  size_t
  wireEncode(EncodingImpl<TAG>& encoder) const;

  const Block&
  wireEncode() const;

  void
  wireDecode(const Block& wire);

public: // attributes
  bool
  empty() const
  {
    return m_type == KeyLocator_None;
  }

  Type
  getType() const
  {
    return m_type;
  }

  KeyLocator&
  clear();

  const Name&
  getName() const;

  KeyLocator&
  setName(const Name& name);

  const Block&
  getKeyDigest() const;

  KeyLocator&
  setKeyDigest(const Block& keyDigest);

  KeyLocator&
  setKeyDigest(const ConstBufferPtr& keyDigest);

public: // EqualityComparable concept
  bool
  operator==(const KeyLocator& other) const;

  bool
  operator!=(const KeyLocator& other) const
  {
    return !this->operator==(other);
  }

private:
  Type m_type;
  Name m_name;
  Block m_keyDigest;

  mutable Block m_wire;
};

NDN_CXX_DECLARE_WIRE_ENCODE_INSTANTIATIONS(KeyLocator);

std::ostream&
operator<<(std::ostream& os, const KeyLocator& keyLocator);

} // namespace ndn

#endif // NDN_KEY_LOCATOR_HPP