NS-3 based Named Data Networking (NDN) simulator
ndnSIM 2.5: NDN, CCN, CCNx, content centric networks
API Documentation
asf-strategy.hpp
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3  * Copyright (c) 2014-2021, Regents of the University of California,
4  * Arizona Board of Regents,
5  * Colorado State University,
6  * University Pierre & Marie Curie, Sorbonne University,
7  * Washington University in St. Louis,
8  * Beijing Institute of Technology,
9  * The University of Memphis.
10  *
11  * This file is part of NFD (Named Data Networking Forwarding Daemon).
12  * See AUTHORS.md for complete list of NFD authors and contributors.
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25 
26 #ifndef NFD_DAEMON_FW_ASF_STRATEGY_HPP
27 #define NFD_DAEMON_FW_ASF_STRATEGY_HPP
28 
29 #include "asf-measurements.hpp"
30 #include "asf-probing-module.hpp"
32 #include "fw/strategy.hpp"
33 
34 namespace nfd {
35 namespace fw {
36 namespace asf {
37 
45 class AsfStrategy : public Strategy
46 {
47 public:
48  explicit
49  AsfStrategy(Forwarder& forwarder, const Name& name = getStrategyName());
50 
51  static const Name&
53 
54 public: // triggers
55  void
56  afterReceiveInterest(const Interest& interest, const FaceEndpoint& ingress,
57  const shared_ptr<pit::Entry>& pitEntry) override;
58 
59  void
60  beforeSatisfyInterest(const Data& data, const FaceEndpoint& ingress,
61  const shared_ptr<pit::Entry>& pitEntry) override;
62 
63  void
64  afterReceiveNack(const lp::Nack& nack, const FaceEndpoint& ingress,
65  const shared_ptr<pit::Entry>& pitEntry) override;
66 
67 private:
68  void
69  processParams(const PartialName& parsed);
70 
72  forwardInterest(const Interest& interest, Face& outFace, const fib::Entry& fibEntry,
73  const shared_ptr<pit::Entry>& pitEntry);
74 
75  void
76  sendProbe(const Interest& interest, const FaceEndpoint& ingress, const Face& faceToUse,
77  const fib::Entry& fibEntry, const shared_ptr<pit::Entry>& pitEntry);
78 
79  Face*
80  getBestFaceForForwarding(const Interest& interest, const Face& inFace,
81  const fib::Entry& fibEntry, const shared_ptr<pit::Entry>& pitEntry,
82  bool isNewInterest = true);
83 
84  void
85  onTimeoutOrNack(const Name& interestName, FaceId faceId, bool isNack);
86 
87  void
88  sendNoRouteNack(Face& face, const shared_ptr<pit::Entry>& pitEntry);
89 
90 private:
91  AsfMeasurements m_measurements;
92  ProbingModule m_probing;
93  RetxSuppressionExponential m_retxSuppression;
94  size_t m_nMaxTimeouts = 3;
95 
96  static const time::milliseconds RETX_SUPPRESSION_INITIAL;
97  static const time::milliseconds RETX_SUPPRESSION_MAX;
98 };
99 
100 } // namespace asf
101 
102 using asf::AsfStrategy;
103 
104 } // namespace fw
105 } // namespace nfd
106 
107 #endif // NFD_DAEMON_FW_ASF_STRATEGY_HPP
Helper class to retrieve and create strategy measurements.
void afterReceiveNack(const lp::Nack &nack, const FaceEndpoint &ingress, const shared_ptr< pit::Entry > &pitEntry) override
Trigger after a Nack is received.
void afterReceiveInterest(const Interest &interest, const FaceEndpoint &ingress, const shared_ptr< pit::Entry > &pitEntry) override
Trigger after an Interest is received.
void beforeSatisfyInterest(const Data &data, const FaceEndpoint &ingress, const shared_ptr< pit::Entry > &pitEntry) override
trigger before PIT entry is satisfied
Represents a face-endpoint pair in the forwarder.
represents a FIB entry
Definition: fib-entry.hpp:53
static const Name & getStrategyName()
Main class of NFD&#39;s forwarding engine.
Definition: forwarder.hpp:53
Represents an Interest packet.
Definition: interest.hpp:48
represents a Network Nack
Definition: nack.hpp:38
ndn Face
Definition: face-impl.hpp:42
Copyright (c) 2011-2015 Regents of the University of California.
Definition: ndn-common.hpp:39
Name PartialName
Represents an arbitrary sequence of name components.
Definition: name.hpp:36
Represents an absolute name.
Definition: name.hpp:41
Represents a forwarding strategy.
Definition: strategy.hpp:38
Contains information about an Interest toward an outgoing face.
Represents a Data packet.
Definition: data.hpp:37
a retransmission suppression decision algorithm that suppresses retransmissions using exponential bac...
AsfStrategy(Forwarder &forwarder, const Name &name=getStrategyName())
Adaptive SRTT-based Forwarding Strategy.
uint64_t FaceId
Identifies a face.
Definition: face-common.hpp:44
boost::chrono::milliseconds milliseconds
Definition: time.hpp:48