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change tunnels during stream resend attempts 5 and 6

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Vort 2024-04-07 16:47:06 +03:00
parent 1b5f67e185
commit df3dc1f574
1 changed files with 22 additions and 25 deletions
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47
libi2pd/Streaming.cpp
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@ -1024,34 +1024,31 @@ namespace stream
if (packets.size () > 0)
{
m_NumResendAttempts++;
if (m_RTO != INITIAL_RTO)
m_RTO *= 2;
switch (m_NumResendAttempts)
if (m_NumResendAttempts == 1 && m_RTO != INITIAL_RTO)
{
case 1: // congestion avoidance
m_WindowSize -= (m_WindowSize + WINDOW_SIZE_DROP_FRACTION) / WINDOW_SIZE_DROP_FRACTION; // adjustment >= 1
if (m_WindowSize < MIN_WINDOW_SIZE) m_WindowSize = MIN_WINDOW_SIZE;
break;
case 2:
m_TunnelsChangeSequenceNumber = m_SequenceNumber;
m_RTO = INITIAL_RTO; // drop RTO to initial upon tunnels pair change first time
#if (__cplusplus >= 201703L) // C++ 17 or higher
[[fallthrough]];
#endif
// no break here
case 4:
if (m_RoutingSession) m_RoutingSession->SetSharedRoutingPath (nullptr);
UpdateCurrentRemoteLease (); // pick another lease
LogPrint (eLogWarning, "Streaming: Another remote lease has been selected for stream with rSID=", m_RecvStreamID, ", sSID=", m_SendStreamID);
break;
case 3:
// congestion avoidance
m_RTO *= 2;
m_WindowSize -= (m_WindowSize + WINDOW_SIZE_DROP_FRACTION) / WINDOW_SIZE_DROP_FRACTION; // adjustment >= 1
if (m_WindowSize < MIN_WINDOW_SIZE) m_WindowSize = MIN_WINDOW_SIZE;
}
else
{
m_TunnelsChangeSequenceNumber = m_SequenceNumber;
m_RTO = INITIAL_RTO; // drop RTO to initial upon tunnels pair change
if (m_RoutingSession) m_RoutingSession->SetSharedRoutingPath (nullptr);
if (m_NumResendAttempts & 1)
{
// pick another outbound tunnel
m_TunnelsChangeSequenceNumber = m_SequenceNumber;
if (m_RoutingSession) m_RoutingSession->SetSharedRoutingPath (nullptr);
m_CurrentOutboundTunnel = m_LocalDestination.GetOwner ()->GetTunnelPool ()->GetNextOutboundTunnel (m_CurrentOutboundTunnel);
LogPrint (eLogWarning, "Streaming: Another outbound tunnel has been selected for stream with sSID=", m_SendStreamID);
break;
default: ;
LogPrint (eLogWarning, "Streaming: Resend #", m_NumResendAttempts,
", another outbound tunnel has been selected for stream with sSID=", m_SendStreamID);
}
else
{
UpdateCurrentRemoteLease (); // pick another lease
LogPrint (eLogWarning, "Streaming: Resend #", m_NumResendAttempts,
", another remote lease has been selected for stream with rSID=", m_RecvStreamID, ", sSID=", m_SendStreamID);
}
}
SendPackets (packets);
}