NS-3 based Named Data Networking (NDN) simulator
ndnSIM 2.3: NDN, CCN, CCNx, content centric networks
API Documentation
ncc-strategy.hpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
26 #ifndef NFD_DAEMON_FW_NCC_STRATEGY_HPP
27 #define NFD_DAEMON_FW_NCC_STRATEGY_HPP
28 
29 #include "strategy.hpp"
30 
31 namespace nfd {
32 namespace fw {
33 
36 class NccStrategy : public Strategy
37 {
38 public:
39  explicit
40  NccStrategy(Forwarder& forwarder, const Name& name = getStrategyName());
41 
42  static const Name&
44 
45  virtual void
46  afterReceiveInterest(const Face& inFace, const Interest& interest,
47  const shared_ptr<pit::Entry>& pitEntry) override;
48 
49  virtual void
50  beforeSatisfyInterest(const shared_ptr<pit::Entry>& pitEntry,
51  const Face& inFace, const Data& data) override;
52 
56  {
57  public:
58  static constexpr int
60  {
61  return 1000;
62  }
63 
65 
66  void
67  inheritFrom(const MeasurementsEntryInfo& other);
68 
69  shared_ptr<Face>
70  getBestFace();
71 
72  void
73  updateBestFace(const Face& face);
74 
75  void
77 
78  private:
79  void
80  adjustPredictDown();
81 
82  void
83  ageBestFace();
84 
85  public:
86  weak_ptr<Face> bestFace;
87  weak_ptr<Face> previousFace;
88  time::microseconds prediction;
89 
90  static const time::microseconds INITIAL_PREDICTION;
91  static const time::microseconds MIN_PREDICTION;
92  static const int ADJUST_PREDICT_DOWN_SHIFT = 7;
93  static const time::microseconds MAX_PREDICTION;
94  static const int ADJUST_PREDICT_UP_SHIFT = 3;
95  };
96 
98  class PitEntryInfo : public StrategyInfo
99  {
100  public:
101  static constexpr int
103  {
104  return 1001;
105  }
106 
107  virtual
108  ~PitEntryInfo() override;
109 
110  public:
116  time::microseconds maxInterval;
117  };
118 
119 protected:
122 
124  getMeasurementsEntryInfo(const shared_ptr<pit::Entry>& entry);
125 
127  void
128  doPropagate(FaceId inFaceId, weak_ptr<pit::Entry> pitEntryWeak);
129 
131  void
132  timeoutOnBestFace(weak_ptr<pit::Entry> pitEntryWeak);
133 
134 protected:
135  static const time::microseconds DEFER_FIRST_WITHOUT_BEST_FACE;
136  static const time::microseconds DEFER_RANGE_WITHOUT_BEST_FACE;
137  static const int UPDATE_MEASUREMENTS_N_LEVELS = 2;
138  static const time::nanoseconds MEASUREMENTS_LIFETIME;
139 };
140 
141 } // namespace fw
142 } // namespace nfd
143 
144 #endif // NFD_DAEMON_FW_NCC_STRATEGY_HPP
static const time::microseconds DEFER_FIRST_WITHOUT_BEST_FACE
static const Name & getStrategyName()
a forwarding strategy similar to CCNx 0.7.2
StrategyInfo on measurements::Entry.
void doPropagate(FaceId inFaceId, weak_ptr< pit::Entry > pitEntryWeak)
propagate to another upstream
static const int UPDATE_MEASUREMENTS_N_LEVELS
static const time::microseconds DEFER_RANGE_WITHOUT_BEST_FACE
NccStrategy(Forwarder &forwarder, const Name &name=getStrategyName())
time::microseconds maxInterval
maximum interval between forwarding to two nexthops except best and previous
main class of NFD
Definition: forwarder.hpp:54
represents an Interest packet
Definition: interest.hpp:42
virtual void afterReceiveInterest(const Face &inFace, const Interest &interest, const shared_ptr< pit::Entry > &pitEntry) override
trigger after Interest is received
static const time::microseconds MIN_PREDICTION
represents a Measurements entry
std::shared_ptr< ns3::EventId > EventId
Definition: scheduler.hpp:48
ndn Face
Definition: face-impl.hpp:41
static constexpr int getTypeId()
Copyright (c) 2011-2015 Regents of the University of California.
Definition: ndn-common.hpp:40
void inheritFrom(const MeasurementsEntryInfo &other)
void timeoutOnBestFace(weak_ptr< pit::Entry > pitEntryWeak)
best face did not reply within prediction
static const time::nanoseconds MEASUREMENTS_LIFETIME
Represents an absolute name.
Definition: name.hpp:42
scheduler::EventId propagateTimer
timer for propagating to another face
scheduler::EventId bestFaceTimeout
timer that expires when best face does not respond within predicted time
StrategyInfo on pit::Entry.
represents a forwarding strategy
Definition: strategy.hpp:37
MeasurementsEntryInfo & getMeasurementsEntryInfo(measurements::Entry *entry)
static const time::microseconds INITIAL_PREDICTION
uint64_t FaceId
identifies a face
Definition: face.hpp:39
Represents a Data packet.
Definition: data.hpp:35
virtual void beforeSatisfyInterest(const shared_ptr< pit::Entry > &pitEntry, const Face &inFace, const Data &data) override
trigger before PIT entry is satisfied
#define PUBLIC_WITH_TESTS_ELSE_PROTECTED
Definition: common.hpp:39
static const time::microseconds MAX_PREDICTION
contains arbitrary information forwarding strategy places on table entries