RetxSuppressionResult
RetxSuppressionExponential::decidePerUpstream(pit::Entry& pitEntry, Face& outFace)
{
  // NEW if outRecord for the face does not exist
  auto outRecord = pitEntry.getOutRecord(outFace);
  if (outRecord == pitEntry.out_end()) {
    return RetxSuppressionResult::NEW;
  }

  auto lastOutgoing = outRecord->getLastRenewed();
  auto now = time::steady_clock::now();
  auto sinceLastOutgoing = now - lastOutgoing;

  // insertStrategyInfo does not insert m_initialInterval again if it already exists
  PitInfo* pi = outRecord->insertStrategyInfo<PitInfo>(m_initialInterval).first;
  bool shouldSuppress = sinceLastOutgoing < pi->suppressionInterval;

  if (shouldSuppress) {
    return RetxSuppressionResult::SUPPRESS;
  }

  return RetxSuppressionResult::FORWARD;
}
Beispiel #2
0
void
Forwarder::insertDeadNonceList(pit::Entry& pitEntry, bool isSatisfied,
                               const time::milliseconds& dataFreshnessPeriod,
                               Face* upstream)
{
  // need Dead Nonce List insert?
  bool needDnl = false;
  if (isSatisfied) {
    bool hasFreshnessPeriod = dataFreshnessPeriod >= time::milliseconds::zero();
    // Data never becomes stale if it doesn't have FreshnessPeriod field
    needDnl = static_cast<bool>(pitEntry.getInterest().getMustBeFresh()) &&
              (hasFreshnessPeriod && dataFreshnessPeriod < m_deadNonceList.getLifetime());
  }
  else {
    needDnl = true;
  }

  if (!needDnl) {
    return;
  }

  // Dead Nonce List insert
  if (upstream == 0) {
    // insert all outgoing Nonces
    const pit::OutRecordCollection& outRecords = pitEntry.getOutRecords();
    std::for_each(outRecords.begin(), outRecords.end(),
                  bind(&insertNonceToDnl, ref(m_deadNonceList), cref(pitEntry), _1));
  }
  else {
    // insert outgoing Nonce of a specific face
    pit::OutRecordCollection::const_iterator outRecord = pitEntry.getOutRecord(*upstream);
    if (outRecord != pitEntry.getOutRecords().end()) {
      m_deadNonceList.add(pitEntry.getName(), outRecord->getLastNonce());
    }
  }
}