forwarder.hpp

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

#include "common.hpp"
#include "core/scheduler.hpp"
#include "forwarder-counters.hpp"
#include "face-table.hpp"
#include "table/fib.hpp"
#include "table/pit.hpp"
#include "table/cs.hpp"
#include "table/measurements.hpp"
#include "table/strategy-choice.hpp"
#include "table/dead-nonce-list.hpp"
#include "table/network-region-table.hpp"

#include "ns3/ndnSIM/model/cs/ndn-content-store.hpp"

namespace nfd {

namespace fw {
class Strategy;
} // namespace fw

class NullFace;

class Forwarder
{
public:
  Forwarder();

  VIRTUAL_WITH_TESTS
  ~Forwarder();

  const ForwarderCounters&
  getCounters() const;

public: // faces
  FaceTable&
  getFaceTable();

  shared_ptr<Face>
  getFace(FaceId id) const;

  void
  addFace(shared_ptr<Face> face);

public: // forwarding entrypoints and tables
  void
  startProcessInterest(Face& face, const Interest& interest);

  void
  startProcessData(Face& face, const Data& data);

  void
  startProcessNack(Face& face, const lp::Nack& nack);

  NameTree&
  getNameTree();

  Fib&
  getFib();

  Pit&
  getPit();

  Cs&
  getCs();

  Measurements&
  getMeasurements();

  StrategyChoice&
  getStrategyChoice();

  DeadNonceList&
  getDeadNonceList();

  NetworkRegionTable&
  getNetworkRegionTable();

public: // allow enabling ndnSIM content store (will be removed in the future)
  void
  setCsFromNdnSim(ns3::Ptr<ns3::ndn::ContentStore> cs);

public:
  signal::Signal<Forwarder, pit::Entry, Face, Data> beforeSatisfyInterest;

  signal::Signal<Forwarder, pit::Entry> beforeExpirePendingInterest;

PUBLIC_WITH_TESTS_ELSE_PRIVATE: // pipelines
  VIRTUAL_WITH_TESTS void
  onIncomingInterest(Face& inFace, const Interest& interest);

  VIRTUAL_WITH_TESTS void
  onInterestLoop(Face& inFace, const Interest& interest);

  VIRTUAL_WITH_TESTS void
  onContentStoreMiss(const Face& inFace, shared_ptr<pit::Entry> pitEntry, const Interest& interest);

  VIRTUAL_WITH_TESTS void
  onContentStoreHit(const Face& inFace, shared_ptr<pit::Entry> pitEntry,
                    const Interest& interest, const Data& data);

  VIRTUAL_WITH_TESTS void
  onOutgoingInterest(shared_ptr<pit::Entry> pitEntry, Face& outFace,
                     bool wantNewNonce = false);

  VIRTUAL_WITH_TESTS void
  onInterestReject(shared_ptr<pit::Entry> pitEntry);

  VIRTUAL_WITH_TESTS void
  onInterestUnsatisfied(shared_ptr<pit::Entry> pitEntry);

  VIRTUAL_WITH_TESTS void
  onInterestFinalize(shared_ptr<pit::Entry> pitEntry, bool isSatisfied,
                     const time::milliseconds& dataFreshnessPeriod = time::milliseconds(-1));

  VIRTUAL_WITH_TESTS void
  onIncomingData(Face& inFace, const Data& data);

  VIRTUAL_WITH_TESTS void
  onDataUnsolicited(Face& inFace, const Data& data);

  VIRTUAL_WITH_TESTS void
  onOutgoingData(const Data& data, Face& outFace);

  VIRTUAL_WITH_TESTS void
  onIncomingNack(Face& inFace, const lp::Nack& nack);

  VIRTUAL_WITH_TESTS void
  onOutgoingNack(shared_ptr<pit::Entry> pitEntry, const Face& outFace, const lp::NackHeader& nack);

PROTECTED_WITH_TESTS_ELSE_PRIVATE:
  VIRTUAL_WITH_TESTS void
  setUnsatisfyTimer(shared_ptr<pit::Entry> pitEntry);

  VIRTUAL_WITH_TESTS void
  setStragglerTimer(shared_ptr<pit::Entry> pitEntry, bool isSatisfied,
                    const time::milliseconds& dataFreshnessPeriod = time::milliseconds(-1));

  VIRTUAL_WITH_TESTS void
  cancelUnsatisfyAndStragglerTimer(shared_ptr<pit::Entry> pitEntry);

  VIRTUAL_WITH_TESTS void
  insertDeadNonceList(pit::Entry& pitEntry, bool isSatisfied,
                      const time::milliseconds& dataFreshnessPeriod,
                      Face* upstream);

#ifdef WITH_TESTS
  virtual void
  dispatchToStrategy(shared_ptr<pit::Entry> pitEntry, function<void(fw::Strategy*)> trigger);
#else
  template<class Function>
  void
  dispatchToStrategy(shared_ptr<pit::Entry> pitEntry, Function trigger);
#endif

private:
  ForwarderCounters m_counters;

  FaceTable m_faceTable;

  // tables
  NameTree           m_nameTree;
  Fib                m_fib;
  Pit                m_pit;
  Cs                 m_cs;
  Measurements       m_measurements;
  StrategyChoice     m_strategyChoice;
  DeadNonceList      m_deadNonceList;
  NetworkRegionTable m_networkRegionTable;
  shared_ptr<Face>   m_csFace;

  ns3::Ptr<ns3::ndn::ContentStore> m_csFromNdnSim;

  static const Name LOCALHOST_NAME;

  // allow Strategy (base class) to enter pipelines
  friend class fw::Strategy;
};

inline const ForwarderCounters&
Forwarder::getCounters() const
{
  return m_counters;
}

inline FaceTable&
Forwarder::getFaceTable()
{
  return m_faceTable;
}

inline shared_ptr<Face>
Forwarder::getFace(FaceId id) const
{
  return m_faceTable.get(id);
}

inline void
Forwarder::addFace(shared_ptr<Face> face)
{
  m_faceTable.add(face);
}

inline NameTree&
Forwarder::getNameTree()
{
  return m_nameTree;
}

inline Fib&
Forwarder::getFib()
{
  return m_fib;
}

inline Pit&
Forwarder::getPit()
{
  return m_pit;
}

inline Cs&
Forwarder::getCs()
{
  return m_cs;
}

inline Measurements&
Forwarder::getMeasurements()
{
  return m_measurements;
}

inline StrategyChoice&
Forwarder::getStrategyChoice()
{
  return m_strategyChoice;
}

inline DeadNonceList&
Forwarder::getDeadNonceList()
{
  return m_deadNonceList;
}

inline NetworkRegionTable&
Forwarder::getNetworkRegionTable()
{
  return m_networkRegionTable;
}

inline void
Forwarder::setCsFromNdnSim(ns3::Ptr<ns3::ndn::ContentStore> cs)
{
  m_csFromNdnSim = cs;
}

#ifdef WITH_TESTS
inline void
Forwarder::dispatchToStrategy(shared_ptr<pit::Entry> pitEntry, function<void(fw::Strategy*)> trigger)
#else
template<class Function>
inline void
Forwarder::dispatchToStrategy(shared_ptr<pit::Entry> pitEntry, Function trigger)
#endif
{
  fw::Strategy& strategy = m_strategyChoice.findEffectiveStrategy(*pitEntry);
  trigger(&strategy);
}

} // namespace nfd

#endif // NFD_DAEMON_FW_FORWARDER_HPP