NS-3 based Named Data Networking (NDN) simulator
ndnSIM 2.5: NDN, CCN, CCNx, content centric networks
API Documentation
asf-strategy.hpp
Go to the documentation of this file.
1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2014-2018, 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.
13  *
14  * NFD is free software: you can redistribute it and/or modify it under the terms
15  * of the GNU General Public License as published by the Free Software Foundation,
16  * either version 3 of the License, or (at your option) any later version.
17  *
18  * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
19  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
20  * PURPOSE. See the GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License along with
23  * NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
24  */
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 
44 class AsfStrategy : public Strategy
45 {
46 public:
47  explicit
48  AsfStrategy(Forwarder& forwarder, const Name& name = getStrategyName());
49 
50  static const Name&
52 
53 public: // triggers
54  void
55  afterReceiveInterest(const Face& inFace, const Interest& interest,
56  const shared_ptr<pit::Entry>& pitEntry) override;
57 
58  void
59  beforeSatisfyInterest(const shared_ptr<pit::Entry>& pitEntry,
60  const Face& inFace, const Data& data) override;
61 
62  void
63  afterReceiveNack(const Face& inFace, const lp::Nack& nack,
64  const shared_ptr<pit::Entry>& pitEntry) override;
65 
66 private:
67  void
68  forwardInterest(const Interest& interest,
69  const fib::Entry& fibEntry,
70  const shared_ptr<pit::Entry>& pitEntry,
71  Face& outFace,
72  bool wantNewNonce = false);
73 
74  Face*
75  getBestFaceForForwarding(const fib::Entry& fibEntry, const Interest& interest, const Face& inFace);
76 
77  void
78  onTimeout(const Name& interestName, const FaceId faceId);
79 
80  void
81  sendNoRouteNack(const Face& inFace, const Interest& interest, const shared_ptr<pit::Entry>& pitEntry);
82 
83  void
84  processParams(const PartialName& parsed);
85 
86  static uint64_t
87  getParamValue(const std::string& param, const std::string& value);
88 
89 private:
90  AsfMeasurements m_measurements;
91  ProbingModule m_probing;
92  size_t m_maxSilentTimeouts;
93 
94 private:
95  RetxSuppressionExponential m_retxSuppression;
96 
97  static const time::milliseconds RETX_SUPPRESSION_INITIAL;
98  static const time::milliseconds RETX_SUPPRESSION_MAX;
99 };
100 
101 } // namespace asf
102 
103 using asf::AsfStrategy;
104 
105 } // namespace fw
106 } // namespace nfd
107 
108 #endif // NFD_DAEMON_FW_ASF_STRATEGY_HPP
void beforeSatisfyInterest(const shared_ptr< pit::Entry > &pitEntry, const Face &inFace, const Data &data) override
trigger before PIT entry is satisfied
Helper class to retrieve and create strategy measurements.
generalization of a network interface
Definition: face.hpp:67
represents a FIB entry
Definition: fib-entry.hpp:51
static const Name & getStrategyName()
main class of NFD
Definition: forwarder.hpp:54
Represents an Interest packet.
Definition: interest.hpp:42
represents a Network Nack
Definition: nack.hpp:40
Copyright (c) 2011-2015 Regents of the University of California.
Definition: ndn-common.hpp:40
Name PartialName
Represents an arbitrary sequence of name components.
Definition: name.hpp:38
Represents an absolute name.
Definition: name.hpp:42
represents a forwarding strategy
Definition: strategy.hpp:37
void afterReceiveNack(const Face &inFace, const lp::Nack &nack, const shared_ptr< pit::Entry > &pitEntry) override
trigger after Nack is received
void afterReceiveInterest(const Face &inFace, const Interest &interest, const shared_ptr< pit::Entry > &pitEntry) override
trigger after Interest is received
uint64_t FaceId
identifies a face
Definition: face.hpp:39
Represents a Data packet.
Definition: data.hpp:35
a retransmission suppression decision algorithm that suppresses retransmissions using exponential bac...
AsfStrategy(Forwarder &forwarder, const Name &name=getStrategyName())
Adaptive SRTT-based Forwarding Strategy.