asf-strategy.hpp

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

#include "asf-measurements.hpp"
#include "asf-probing-module.hpp"
#include "fw/retx-suppression-exponential.hpp"
#include "fw/strategy.hpp"

namespace nfd {
namespace fw {
namespace asf {

class AsfStrategy : public Strategy
{
public:
  explicit
  AsfStrategy(Forwarder& forwarder, const Name& name = getStrategyName());

  static const Name&
  getStrategyName();

public: // triggers
  virtual void
  afterReceiveInterest(const Face& inFace, const Interest& interest,
                       const shared_ptr<pit::Entry>& pitEntry) override;

  virtual void
  beforeSatisfyInterest(const shared_ptr<pit::Entry>& pitEntry,
                        const Face& inFace, const Data& data) override;

  virtual void
  afterReceiveNack(const Face& inFace, const lp::Nack& nack,
                   const shared_ptr<pit::Entry>& pitEntry) override;

private:
  void
  forwardInterest(const Interest& interest,
                  const fib::Entry& fibEntry,
                  const shared_ptr<pit::Entry>& pitEntry,
                  Face& outFace,
                  bool wantNewNonce = false);

  Face*
  getBestFaceForForwarding(const fib::Entry& fibEntry, const Interest& interest, const Face& inFace);

  void
  onTimeout(const Name& interestName, face::FaceId faceId);

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

private:
  AsfMeasurements m_measurements;
  ProbingModule m_probing;

private:
  RetxSuppressionExponential m_retxSuppression;

  static const time::milliseconds RETX_SUPPRESSION_INITIAL;
  static const time::milliseconds RETX_SUPPRESSION_MAX;
};

} // namespace asf

using asf::AsfStrategy;

} // namespace fw
} // namespace nfd

#endif // NFD_DAEMON_FW_ASF_STRATEGY_HPP