shared_ptr<Entry>
Measurements::get(const fib::Entry& fibEntry)
{
shared_ptr<name_tree::Entry> nte = m_nameTree.get(fibEntry);
if (nte == nullptr) {
// must be Fib::s_emptyEntry that is unattched
BOOST_ASSERT(fibEntry.getPrefix().empty());
nte = m_nameTree.lookup(fibEntry.getPrefix());
}
BOOST_ASSERT(nte != nullptr);
return this->get(*nte);
}
void
ProbingModule::scheduleProbe(const fib::Entry& fibEntry, const time::milliseconds& interval)
{
Name prefix = fibEntry.getPrefix();
// Set the probing flag for the namespace to true after passed interval of time
scheduler::schedule(interval, [this, prefix] {
NamespaceInfo* info = m_measurements.getNamespaceInfo(prefix);
if (info == nullptr) {
// fib::Entry with the passed prefix has been removed or the fib::Entry has
// a name that is not controlled by the AsfStrategy
return;
}
else {
info->setIsProbingDue(true);
}
});
}
void
AsfStrategy::forwardInterest(const Interest& interest,
const fib::Entry& fibEntry,
const shared_ptr<pit::Entry>& pitEntry,
Face& outFace,
bool wantNewNonce)
{
if (wantNewNonce) {
//Send probe: interest with new Nonce
Interest probeInterest(interest);
probeInterest.refreshNonce();
NFD_LOG_TRACE("Sending probe for " << probeInterest << probeInterest.getNonce()
<< " to FaceId: " << outFace.getId());
this->sendInterest(pitEntry, outFace, probeInterest);
}
else {
this->sendInterest(pitEntry, outFace, interest);
}
FaceInfo& faceInfo = m_measurements.getOrCreateFaceInfo(fibEntry, interest, outFace);
// Refresh measurements since Face is being used for forwarding
NamespaceInfo& namespaceInfo = m_measurements.getOrCreateNamespaceInfo(fibEntry, interest);
namespaceInfo.extendFaceInfoLifetime(faceInfo, outFace);
if (!faceInfo.isTimeoutScheduled()) {
// Estimate and schedule timeout
RttEstimator::Duration timeout = faceInfo.computeRto();
NFD_LOG_TRACE("Scheduling timeout for " << fibEntry.getPrefix()
<< " FaceId: " << outFace.getId()
<< " in " << time::duration_cast<time::milliseconds>(timeout) << " ms");
scheduler::EventId id = scheduler::schedule(timeout,
bind(&AsfStrategy::onTimeout, this, interest.getName(), outFace.getId()));
faceInfo.setTimeoutEvent(id, interest.getName());
}
}