generic-link-service.hpp

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

#include "core/common.hpp"
#include "core/logger.hpp"

#include "link-service.hpp"
#include "lp-fragmenter.hpp"
#include "lp-reassembler.hpp"

namespace nfd {
namespace face {

class GenericLinkServiceCounters : public virtual LinkService::Counters
{
public:
  explicit
  GenericLinkServiceCounters(const LpReassembler& reassembler);

  PacketCounter nFragmentationErrors;

  PacketCounter nOutOverMtu;

  PacketCounter nInLpInvalid;

  SizeCounter<LpReassembler> nReassembling;

  PacketCounter nReassemblyTimeouts;

  PacketCounter nInNetInvalid;
};

class GenericLinkService : public LinkService
                         , protected virtual GenericLinkServiceCounters
{
public:
  class Options
  {
  public:
    Options();

  public:
    bool allowLocalFields;

    bool allowFragmentation;

    LpFragmenter::Options fragmenterOptions;

    bool allowReassembly;

    LpReassembler::Options reassemblerOptions;
  };

  typedef GenericLinkServiceCounters Counters;

  explicit
  GenericLinkService(const Options& options = Options());

  const Options&
  getOptions() const;

  void
  setOptions(const Options& options);

  virtual const Counters&
  getCounters() const override;

private: // send path
  void
  doSendInterest(const Interest& interest) override;

  void
  doSendData(const Data& data) override;

  void
  doSendNack(const ndn::lp::Nack& nack) override;

  void
  encodeLpFields(const ndn::TagHost& netPkt, lp::Packet& lpPacket);

  void
  sendNetPacket(lp::Packet&& pkt);

  void
  assignSequence(lp::Packet& pkt);

  void
  assignSequences(std::vector<lp::Packet>& pkts);

private: // receive path
  void
  doReceivePacket(Transport::Packet&& packet) override;

  void
  decodeNetPacket(const Block& netPkt, const lp::Packet& firstPkt);

  void
  decodeInterest(const Block& netPkt, const lp::Packet& firstPkt);

  void
  decodeData(const Block& netPkt, const lp::Packet& firstPkt);

  void
  decodeNack(const Block& netPkt, const lp::Packet& firstPkt);

private:
  Options m_options;
  LpFragmenter m_fragmenter;
  LpReassembler m_reassembler;
  lp::Sequence m_lastSeqNo;
};

inline const GenericLinkService::Options&
GenericLinkService::getOptions() const
{
  return m_options;
}

inline void
GenericLinkService::setOptions(const GenericLinkService::Options& options)
{
  m_options = options;
}

inline const GenericLinkService::Counters&
GenericLinkService::getCounters() const
{
  return *this;
}

} // namespace face
} // namespace nfd

#endif // NFD_DAEMON_FACE_GENERIC_LINK_SERVICE_HPP