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wifi: Check if an agreement exists before resetting it

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Fix crashes with non-null inactivity timeout
This commit is contained in:
Stefano Avallone
2019-09-19 18:11:49 +02:00
parent 1b96764ead
commit 33dd9ce2f1
1 changed files with 6 additions and 1 deletions
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7
src/wifi/model/qos-txop.cc
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@@ -1741,7 +1741,12 @@ void
QosTxop::ResetBa (Mac48Address recipient, uint8_t tid)
{
NS_LOG_FUNCTION (this << recipient << +tid);
if (!m_baManager->ExistsAgreementInState (recipient, tid, OriginatorBlockAckAgreement::ESTABLISHED))
// This function is scheduled when waiting for an ADDBA response. However,
// before this function is called, a DELBA request may arrive, which causes
// the agreement to be deleted. Hence, check if an agreement exists before
// notifying that the agreement has to be reset.
if (m_baManager->ExistsAgreement (recipient, tid)
&& !m_baManager->ExistsAgreementInState (recipient, tid, OriginatorBlockAckAgreement::ESTABLISHED))
{
m_baManager->NotifyAgreementReset (recipient, tid);
}