ndnlp-partial-message-store.hpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#ifndef NFD_DAEMON_FACE_NDNLP_PARTIAL_MESSAGE_STORE_HPP
#define NFD_DAEMON_FACE_NDNLP_PARTIAL_MESSAGE_STORE_HPP

#include "ndnlp-data.hpp"
#include "core/scheduler.hpp"

namespace nfd {
namespace ndnlp {

class PartialMessage
{
public:
  PartialMessage();

  PartialMessage(const PartialMessage&) = delete;

  PartialMessage&
  operator=(const PartialMessage&) = delete;

  PartialMessage(PartialMessage&&) = default;

  PartialMessage&
  operator=(PartialMessage&&) = default;

  bool
  add(uint16_t fragIndex, uint16_t fragCount, const Block& payload);

  bool
  isComplete() const;

  std::tuple<bool, Block>
  reassemble();

  static std::tuple<bool, Block>
  reassembleSingle(const NdnlpData& fragment);

public:
  scheduler::ScopedEventId expiry;

private:
  size_t m_fragCount;
  size_t m_received;
  std::vector<Block> m_payloads;
  size_t m_totalLength;
};

class PartialMessageStore : noncopyable
{
public:
  explicit
  PartialMessageStore(const time::nanoseconds& idleDuration = time::milliseconds(100));

  void
  receive(const NdnlpData& pkt);

  signal::Signal<PartialMessageStore, Block> onReceive;

private:
  void
  scheduleCleanup(uint64_t messageIdentifier, PartialMessage& partialMessage);

  void
  cleanup(uint64_t messageIdentifier);

private:
  std::unordered_map<uint64_t, PartialMessage> m_partialMessages;

  time::nanoseconds m_idleDuration;
};

} // namespace ndnlp
} // namespace nfd

#endif // NFD_DAEMON_FACE_NDNLP_PARTIAL_MESSAGE_STORE_HPP