/** \brief determines whether a NextHop is eligible
* \param currentDownstream incoming FaceId of current Interest
* \param wantUnused if true, NextHop must not have unexpired OutRecord
* \param now time::steady_clock::now(), ignored if !wantUnused
*/
static inline bool
congestion_Predicate_NextHop_eligible(const shared_ptr<pit::Entry>& pitEntry,
const fib::NextHop& nexthop, FaceId currentDownstream, const Name& prefix,
bool wantUnused = false,
time::steady_clock::TimePoint now = time::steady_clock::TimePoint::min())
{
shared_ptr<Face> upstream = nexthop.getFace();
// upstream is current downstream
if (upstream->getId() == currentDownstream)
return false;
// forwarding would violate scope
if (pitEntry->violatesScope(*upstream))
return false;
// BOOST_CHECK_MESSAGE(true, "f**k");
if (!upstream->m_cc->available(prefix))
return false;
if (wantUnused) {
// NextHop must not have unexpired OutRecord
pit::OutRecordCollection::const_iterator outRecord = pitEntry->getOutRecord(*upstream);
if (outRecord != pitEntry->getOutRecords().end() &&
outRecord->getExpiry() > now) {
return false;
}
}
return true;
}
static bool
canForwardToNextHop(shared_ptr<pit::Entry> pitEntry, const fib::NextHop& nexthop)
{
return pitEntry->canForwardTo(*nexthop.getFace());
}