Best Route strategy version 2. More...

#include <best-route-strategy2.hpp>

Inheritance diagram for nfd::fw::BestRouteStrategy2:

Collaboration diagram for nfd::fw::BestRouteStrategy2:

Public Member Functions
	BestRouteStrategy2 (Forwarder &forwarder, const Name &name=STRATEGY_NAME)

virtual void	afterReceiveInterest (const Face &inFace, const Interest &interest, shared_ptr< fib::Entry > fibEntry, shared_ptr< pit::Entry > pitEntry) 1
	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
	a Name that represent the Strategy program More...

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

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

Static Public Attributes
static const Name	STRATEGY_NAME

static const time::milliseconds	MIN_RETRANSMISSION_INTERVAL

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

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

MeasurementsAccessor &	getMeasurements ()

shared_ptr< Face >	getFace (FaceId id)

const FaceTable &	getFaceTable ()

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

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

Detailed Description

Best Route strategy version 2.

This strategy forwards a new Interest to the lowest-cost nexthop (except downstream). After that, it recognizes consumer retransmission: if a similar Interest arrives from any downstream after MIN_RETRANSMISSION_INTERVAL, the strategy forwards the Interest again to the lowest-cost nexthop (except downstream) that is not previously used. If all nexthops have been used, the strategy starts over.

Definition at line 42 of file best-route-strategy2.hpp.

Constructor & Destructor Documentation

nfd::fw::BestRouteStrategy2::BestRouteStrategy2	(	Forwarder &	forwarder,
		const Name &	name = `STRATEGY_NAME`
	)

Definition at line 38 of file best-route-strategy2.cpp.

Member Function Documentation

void nfd::fw::BestRouteStrategy2::afterReceiveInterest	(	const Face &	inFace,
		const Interest &	interest,
		shared_ptr< fib::Entry >	fibEntry,
		shared_ptr< pit::Entry >	pitEntry
	)

virtual

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

Note: The strategy is permitted to store a weak reference to fibEntry. Do not store a shared reference, because PIT entry may be deleted at any moment. fibEntry is passed by value to allow obtaining a weak reference from it.; The strategy is permitted to store a shared reference to pitEntry. pitEntry is passed by value to reflect this fact.

Implements nfd::fw::Strategy.

Definition at line 106 of file best-route-strategy2.cpp.

References nfd::fw::compare_OutRecord_lastRenewed(), nfd::fw::findEligibleNextHopWithEarliestOutRecord(), nfd::Face::getId(), MIN_RETRANSMISSION_INTERVAL, NFD_LOG_DEBUG, nfd::fw::predicate_NextHop_eligible(), nfd::fw::Strategy::rejectPendingInterest(), and nfd::fw::Strategy::sendInterest().