Best Route strategy version 1. More...

#include <best-route-strategy.hpp>

Inheritance diagram for nfd::fw::BestRouteStrategy:

Collaboration diagram for nfd::fw::BestRouteStrategy:

[legend]

Public Member Functions
	BestRouteStrategy (Forwarder &forwarder, const Name &name=STRATEGY_NAME)

virtual void	afterReceiveInterest (const Face &inFace, const Interest &interest, const shared_ptr< pit::Entry > &pitEntry) override
	trigger after Interest is received More...

Public Member Functions inherited from nfd::fw::Strategy
	Strategy (Forwarder &forwarder, const Name &name)
	construct a strategy instance More...

virtual	~Strategy ()

const Name &	getName () const

virtual void	beforeSatisfyInterest (const shared_ptr< pit::Entry > &pitEntry, const Face &inFace, const Data &data)
	trigger before PIT entry is satisfied More...

virtual void	beforeExpirePendingInterest (const shared_ptr< pit::Entry > &pitEntry)
	trigger before PIT entry expires More...

virtual void	afterReceiveNack (const Face &inFace, const lp::Nack &nack, const shared_ptr< pit::Entry > &pitEntry)
	trigger after Nack is received More...

Static Public Attributes
static const Name	STRATEGY_NAME

Additional Inherited Members
Protected Member Functions inherited from nfd::fw::Strategy
void	sendInterest (const shared_ptr< pit::Entry > &pitEntry, Face &outFace, const Interest &interest)
	send Interest to outFace More...

	DEPRECATED (void sendInterest(const shared_ptr< pit::Entry > &pitEntry, Face &outFace, bool wantNewNonce=false))
	send Interest to outFace More...

void	rejectPendingInterest (const shared_ptr< pit::Entry > &pitEntry)
	decide that a pending Interest cannot be forwarded More...

void	sendNack (const shared_ptr< pit::Entry > &pitEntry, const Face &outFace, const lp::NackHeader &header)
	send Nack to outFace More...

void	sendNacks (const shared_ptr< pit::Entry > &pitEntry, const lp::NackHeader &header, std::initializer_list< const Face > exceptFaces=std::initializer_list< const Face >())
	send Nack to every face that has an in-record, except those in `exceptFaces` More...

const fib::Entry &	lookupFib (const pit::Entry &pitEntry) const
	performs a FIB lookup, considering Link object if present More...

MeasurementsAccessor &	getMeasurements ()

Face *	getFace (FaceId id) const

const FaceTable &	getFaceTable () const

Protected Attributes inherited from nfd::fw::Strategy
signal::Signal< FaceTable, Face & > &	afterAddFace

signal::Signal< FaceTable, Face & > &	beforeRemoveFace

Detailed Description

Best Route strategy version 1.

This strategy forwards a new Interest to the lowest-cost nexthop that is not same as the downstream, and does not violate scope. Subsequent similar Interests or consumer retransmissions are suppressed until after InterestLifetime expiry.

Deprecated:: This strategy is superceded by Best Route strategy version 2, which allows consumer retransmissions. This version is kept for comparison purposes and is not recommended for general usage.

Definition at line 45 of file best-route-strategy.hpp.

Constructor & Destructor Documentation

◆ BestRouteStrategy()

nfd::fw::BestRouteStrategy::BestRouteStrategy	(	Forwarder &	forwarder,
		const Name &	name = `STRATEGY_NAME`
	)

explicit

Definition at line 35 of file best-route-strategy.cpp.

Member Function Documentation

◆ afterReceiveInterest()

void nfd::fw::BestRouteStrategy::afterReceiveInterest	(	const Face &	inFace,
		const Interest &	interest,
		const shared_ptr< pit::Entry > &	pitEntry
	)

overridevirtual

trigger after Interest is received

The Interest:

does not violate Scope
is not looped
cannot be satisfied by ContentStore
is under a namespace managed by this strategy

The strategy should decide whether and where to forward this Interest.

If the strategy decides to forward this Interest, invoke this->sendInterest one or more times, either now or shortly after
If strategy concludes that this Interest cannot be forwarded, invoke this->rejectPendingInterest so that PIT entry will be deleted shortly

Warning: The strategy must not retain shared_ptr<pit::Entry>, otherwise undefined behavior may occur. However, the strategy is allowed to store weak_ptr<pit::Entry>.

Implements nfd::fw::Strategy.

Reimplemented in nfd::fw::ClientControlStrategy.

Definition at line 41 of file best-route-strategy.cpp.

References nfd::fw::canForwardToLegacy(), nfd::fib::Entry::getNextHops(), nfd::fw::hasPendingOutRecords(), nfd::fw::Strategy::lookupFib(), nfd::fw::Strategy::rejectPendingInterest(), nfd::fw::Strategy::sendInterest(), and nfd::fw::wouldViolateScope().

Referenced by nfd::fw::ClientControlStrategy::afterReceiveInterest().