NS-3 based Named Data Networking (NDN) simulator
ndnSIM 2.5: NDN, CCN, CCNx, content centric networks
API Documentation
access-strategy.hpp
Go to the documentation of this file.
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2014-2019, Regents of the University of California,
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* Arizona Board of Regents,
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* Colorado State University,
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* University Pierre & Marie Curie, Sorbonne University,
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* Washington University in St. Louis,
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* Beijing Institute of Technology,
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* The University of Memphis.
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*
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* This file is part of NFD (Named Data Networking Forwarding Daemon).
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* See AUTHORS.md for complete list of NFD authors and contributors.
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*
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* NFD is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef NFD_DAEMON_FW_ACCESS_STRATEGY_HPP
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#define NFD_DAEMON_FW_ACCESS_STRATEGY_HPP
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#include "
strategy.hpp
"
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#include "
retx-suppression-fixed.hpp
"
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#include <
ndn-cxx/util/rtt-estimator.hpp
>
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namespace
nfd
{
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namespace
fw {
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class
AccessStrategy
:
public
Strategy
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{
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public
:
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explicit
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AccessStrategy
(
Forwarder
& forwarder,
const
Name
&
name
=
getStrategyName
());
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static
const
Name
&
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getStrategyName
();
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public
:
// triggers
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void
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afterReceiveInterest
(
const
FaceEndpoint
& ingress,
const
Interest
& interest,
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const
shared_ptr<pit::Entry>& pitEntry)
override
;
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void
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beforeSatisfyInterest
(
const
shared_ptr<pit::Entry>& pitEntry,
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const
FaceEndpoint
& ingress,
const
Data
& data)
override
;
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private
:
// StrategyInfo
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using
RttEstimator
=
ndn::util::RttEstimator
;
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class
PitInfo :
public
StrategyInfo
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{
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public
:
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static
constexpr
int
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getTypeId()
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{
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return
1010;
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}
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public
:
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scheduler::ScopedEventId
rtoTimer;
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};
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class
MtInfo :
public
StrategyInfo
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{
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public
:
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static
constexpr
int
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getTypeId()
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{
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return
1011;
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}
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explicit
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MtInfo(shared_ptr<const RttEstimator::Options> opts)
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: rtt(
std::move
(opts))
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{
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}
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public
:
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FaceId
lastNexthop =
face::INVALID_FACEID
;
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RttEstimator
rtt;
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};
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std::tuple<Name, MtInfo*>
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findPrefixMeasurements(
const
pit::Entry
& pitEntry);
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MtInfo*
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addPrefixMeasurements(
const
Data
& data);
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class
FaceInfo
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{
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public
:
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explicit
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FaceInfo(shared_ptr<const RttEstimator::Options> opts)
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: rtt(
std::move
(opts))
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{
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}
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public
:
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RttEstimator
rtt;
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};
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private
:
// forwarding procedures
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void
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afterReceiveNewInterest(
const
FaceEndpoint
& ingress,
const
Interest
& interest,
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const
shared_ptr<pit::Entry>& pitEntry);
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void
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afterReceiveRetxInterest(
const
FaceEndpoint
& ingress,
const
Interest
& interest,
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const
shared_ptr<pit::Entry>& pitEntry);
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bool
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sendToLastNexthop(
const
FaceEndpoint
& ingress,
const
Interest
& interest,
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const
shared_ptr<pit::Entry>& pitEntry, MtInfo& mi,
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const
fib::Entry
& fibEntry);
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void
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afterRtoTimeout(
const
weak_ptr<pit::Entry>& pitWeak,
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FaceId
inFaceId,
EndpointId
inEndpointId,
FaceId
firstOutFaceId);
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size_t
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multicast(
const
Face
& inFace,
const
Interest
& interest,
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const
shared_ptr<pit::Entry>& pitEntry,
const
fib::Entry
& fibEntry,
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FaceId
exceptFace =
face::INVALID_FACEID
);
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void
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updateMeasurements(
const
Face
& inFace,
const
Data
& data, time::nanoseconds rtt);
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private
:
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const
shared_ptr<const RttEstimator::Options> m_rttEstimatorOpts;
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std::unordered_map<FaceId, FaceInfo> m_fit;
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RetxSuppressionFixed
m_retxSuppression;
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signal::ScopedConnection
m_removeFaceConn;
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};
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}
// namespace fw
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}
// namespace nfd
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#endif // NFD_DAEMON_FW_ACCESS_STRATEGY_HPP
nfd::fw::AccessStrategy::getStrategyName
static const Name & getStrategyName()
Definition:
access-strategy.cpp:53
nfd::fw::AccessStrategy
Access Router Strategy version 1.
Definition:
access-strategy.hpp:51
ndn::util::signal::ScopedConnection
Disconnects a Connection automatically upon destruction.
Definition:
scoped-connection.hpp:34
nonstd::optional_lite::std11::move
T & move(T &t)
Definition:
optional.hpp:421
nfd::fw::RetxSuppressionFixed
a retransmission suppression decision algorithm that suppresses retransmissions within a fixed durati...
Definition:
retx-suppression-fixed.hpp:39
rtt-estimator.hpp
ndn::Name
Represents an absolute name.
Definition:
name.hpp:44
nfd
Copyright (c) 2011-2015 Regents of the University of California.
Definition:
ndn-common.hpp:40
nfd::face::INVALID_FACEID
const FaceId INVALID_FACEID
indicates an invalid FaceId
Definition:
face-common.hpp:47
nfd::fw::StrategyInfo
contains arbitrary information forwarding strategy places on table entries
Definition:
strategy-info.hpp:37
nfd::face::FaceId
uint64_t FaceId
Identifies a face.
Definition:
face-common.hpp:44
nfd::face::Face
generalization of a network interface
Definition:
face.hpp:53
nfd::pit::Entry
An Interest table entry.
Definition:
pit-entry.hpp:59
nfd::FaceEndpoint
Represents a face-endpoint pair in the forwarder.
Definition:
face-endpoint.hpp:37
retx-suppression-fixed.hpp
ndn::Interest
Represents an Interest packet.
Definition:
interest.hpp:44
nfd::fw::AccessStrategy::afterReceiveInterest
void afterReceiveInterest(const FaceEndpoint &ingress, const Interest &interest, const shared_ptr< pit::Entry > &pitEntry) override
trigger after Interest is received
Definition:
access-strategy.cpp:60
nfd::fib::Entry
represents a FIB entry
Definition:
fib-entry.hpp:54
ndn::Data
Represents a Data packet.
Definition:
data.hpp:36
nfd::fw::Strategy
represents a forwarding strategy
Definition:
strategy.hpp:38
nfd::Forwarder
Main class of NFD's forwarding engine.
Definition:
forwarder.hpp:52
ndn::util::RttEstimator
RTT/RTO estimator.
Definition:
rtt-estimator.hpp:42
strategy.hpp
RttEstimator
ndn RttEstimator
Definition:
ndn-rtt-estimator.cpp:38
ndn::name
Definition:
name-component-types.hpp:33
nfd::face::EndpointId
uint64_t EndpointId
Identifies a remote endpoint on the link.
Definition:
face-common.hpp:65
nfd::fw::AccessStrategy::beforeSatisfyInterest
void beforeSatisfyInterest(const shared_ptr< pit::Entry > &pitEntry, const FaceEndpoint &ingress, const Data &data) override
trigger before PIT entry is satisfied
Definition:
access-strategy.cpp:209
ndn::detail::ScopedCancelHandle< EventId >
nfd::fw::AccessStrategy::AccessStrategy
AccessStrategy(Forwarder &forwarder, const Name &name=getStrategyName())
Definition:
access-strategy.cpp:37
ndnSIM
NFD
daemon
fw
access-strategy.hpp
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