From: Denis Kirjanov <[email protected]> Date: Thu, 25 Jun 2020 14:51:06 +0300
> there is a problem with the CWR flag set in an incoming ACK segment > and it leads to the situation when the ECE flag is latched forever > > the following packetdrill script shows what happens: ... > In the situation above we will continue to send ECN ECHO packets > and trigger the peer to reduce the congestion window. To avoid that > we can check CWR on pure ACKs received. > > v3: > - Add a sequence check to avoid sending an ACK to an ACK > > v2: > - Adjusted the comment > - move CWR check before checking for unacknowledged packets > > Signed-off-by: Denis Kirjanov <[email protected]> Applied, thanks.
