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tcp: tracing the retransmission after a Timeout

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This commit is contained in:
Natale Patriciello
2017-02-03 14:02:58 +01:00
parent 02a42256a1
commit 5206b062a1
1 changed files with 11 additions and 2 deletions
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13
src/internet/model/tcp-socket-base.cc
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@@ -97,7 +97,7 @@ TcpSocketBase::GetTypeId (void)
MakeBooleanAccessor (&TcpSocketBase::m_winScalingEnabled),
MakeBooleanChecker ())
.AddAttribute ("Sack", "Enable or disable Sack option",
BooleanValue (false),
BooleanValue (true),
MakeBooleanAccessor (&TcpSocketBase::m_sackEnabled),
MakeBooleanChecker ())
.AddAttribute ("Timestamp", "Enable or disable Timestamp option",
@@ -3324,10 +3324,19 @@ TcpSocketBase::DoRetransmit ()
}
// Retransmit a data packet: Call SendDataPacket
SequenceNumber32 oldSequence = m_tcb->m_nextTxSequence;
m_tcb->m_nextTxSequence = m_txBuffer->HeadSequence ();
uint32_t sz = SendDataPacket (m_txBuffer->HeadSequence (), m_tcb->m_segmentSize, true);
// In case of RTO, advance m_tcb->m_nextTxSequence
m_tcb->m_nextTxSequence = std::max (m_tcb->m_nextTxSequence.Get (), m_txBuffer->HeadSequence () + sz);
if (oldSequence == m_tcb->m_nextTxSequence.Get ())
{
m_tcb->m_nextTxSequence = std::max (m_tcb->m_nextTxSequence.Get (), m_txBuffer->HeadSequence () + sz);
}
else
{
m_tcb->m_nextTxSequence = oldSequence;
}
NS_LOG_DEBUG ("retxing seq " << m_txBuffer->HeadSequence ());
}