a forwarding strategy similar to CCNx 0.7.2
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#include <ncc-strategy.hpp>
a forwarding strategy similar to CCNx 0.7.2
Definition at line 36 of file ncc-strategy.hpp.
void nfd::fw::NccStrategy::afterReceiveInterest |
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const Face & |
inFace, |
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const Interest & |
interest, |
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const shared_ptr< pit::Entry > & |
pitEntry |
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) |
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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.
Definition at line 47 of file ncc-strategy.cpp.
void nfd::fw::Strategy::afterReceiveNack |
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const Face & |
inFace, |
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const lp::Nack & |
nack, |
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const shared_ptr< pit::Entry > & |
pitEntry |
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) |
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virtualinherited |
trigger after Nack is received
This trigger is invoked when an incoming Nack is received in response to an forwarded Interest. The Nack has been confirmed to be a response to the last Interest forwarded to that upstream, i.e. the PIT out-record exists and has a matching Nonce. The NackHeader has been recorded in the PIT out-record.
In this base class this method does nothing.
- 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>.
Reimplemented in nfd::fw::BestRouteStrategy2, and nfd::fw::asf::AsfStrategy.
Definition at line 61 of file strategy.cpp.
void nfd::fw::Strategy::beforeExpirePendingInterest |
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const shared_ptr< pit::Entry > & |
pitEntry | ) |
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virtualinherited |
trigger before PIT entry expires
PIT entry expires when InterestLifetime has elapsed for all InRecords, and it is not satisfied by an incoming Data.
This trigger is not invoked for PIT entry already satisfied.
In this base class this method does nothing.
- 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>, although this isn't useful here because PIT entry would be deleted shortly after.
Definition at line 55 of file strategy.cpp.
void nfd::fw::NccStrategy::beforeSatisfyInterest |
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const shared_ptr< pit::Entry > & |
pitEntry, |
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const Face & |
inFace, |
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const Data & |
data |
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) |
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overridevirtual |
trigger before PIT entry is satisfied
This trigger is invoked when an incoming Data satisfies the PIT entry. It can be invoked even if the PIT entry has already been satisfied.
In this base class this method does nothing.
- 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>.
Reimplemented from nfd::fw::Strategy.
Definition at line 178 of file ncc-strategy.cpp.
void nfd::fw::NccStrategy::doPropagate |
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weak_ptr< pit::Entry > |
pitEntryWeak | ) |
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protected |
Face* nfd::fw::Strategy::getFace |
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FaceId |
id | ) |
const |
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inlineprotectedinherited |
const FaceTable& nfd::fw::Strategy::getFaceTable |
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const |
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inlineprotectedinherited |
MeasurementsAccessor& nfd::fw::Strategy::getMeasurements |
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inlineprotectedinherited |
const Name& nfd::fw::Strategy::getName |
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const |
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inlineinherited |
- Returns
- a Name that represents the strategy program
Definition at line 56 of file strategy.hpp.
performs a FIB lookup, considering Link object if present
- Todo:
- Don't modify in-record Interests. Set SelectedDelegation in outgoing Interest pipeline.
Definition at line 91 of file strategy.cpp.
void nfd::fw::Strategy::rejectPendingInterest |
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const shared_ptr< pit::Entry > & |
pitEntry | ) |
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inlineprotectedinherited |
decide that a pending Interest cannot be forwarded
- Parameters
-
This shall not be called if the pending Interest has been forwarded earlier, and does not need to be resent now.
Definition at line 151 of file strategy.hpp.
void nfd::fw::Strategy::sendInterest |
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const shared_ptr< pit::Entry > & |
pitEntry, |
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Face & |
outFace, |
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bool |
wantNewNonce = false |
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inlineprotectedinherited |
send Interest to outFace
- Parameters
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pitEntry | PIT entry |
outFace | face through which to send out the Interest |
wantNewNonce | if true, a new Nonce will be generated, rather than reusing a Nonce from one of the PIT in-records |
Definition at line 138 of file strategy.hpp.
void nfd::fw::Strategy::sendNack |
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const shared_ptr< pit::Entry > & |
pitEntry, |
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const Face & |
outFace, |
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const lp::NackHeader & |
header |
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inlineprotectedinherited |
send Nack to outFace
- Parameters
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pitEntry | PIT entry |
outFace | face through which to send out the Nack |
header | Nack header |
The outFace must have a PIT in-record, otherwise this method has no effect.
Definition at line 164 of file strategy.hpp.
void nfd::fw::Strategy::sendNacks |
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const shared_ptr< pit::Entry > & |
pitEntry, |
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const lp::NackHeader & |
header, |
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std::initializer_list< const Face * > |
exceptFaces = std::initializer_list<const Face*>() |
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protectedinherited |
send Nack to every face that has an in-record, except those in exceptFaces
- Parameters
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pitEntry | PIT entry |
header | NACK header |
exceptFaces | list of faces that should be excluded from sending Nacks |
- Note
- This is not an action, but a helper that invokes the sendNack action.
Definition at line 69 of file strategy.cpp.
void nfd::fw::NccStrategy::timeoutOnBestFace |
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weak_ptr< pit::Entry > |
pitEntryWeak | ) |
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protected |
signal::Signal<FaceTable, Face&>& nfd::fw::Strategy::afterAddFace |
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protectedinherited |
signal::Signal<FaceTable, Face&>& nfd::fw::Strategy::beforeRemoveFace |
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protectedinherited |
const time::microseconds nfd::fw::NccStrategy::DEFER_FIRST_WITHOUT_BEST_FACE = time::microseconds(4000) |
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staticprotected |
const time::microseconds nfd::fw::NccStrategy::DEFER_RANGE_WITHOUT_BEST_FACE = time::microseconds(75000) |
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staticprotected |
const time::nanoseconds nfd::fw::NccStrategy::MEASUREMENTS_LIFETIME = time::seconds(16) |
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staticprotected |
const Name nfd::fw::NccStrategy::STRATEGY_NAME |
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const int nfd::fw::NccStrategy::UPDATE_MEASUREMENTS_N_LEVELS = 2 |
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staticprotected |