RE: Sending empty segment upon receiving partial ACK

ehalf Of jaeyong yoo Sent: Mittwoch, 19. Februar 2025 00:12 To: freebsd-net@freebsd.org Subject: Sending empty segment upon receiving partial ACK [Sie erhalten nicht häufig E-Mails von y.jaey...@gmail.com. Weitere Informationen, warum dies wichtig ist, finden Sie unter https

Re: Sending empty segment upon receiving partial ACK

I see Bug 285158 is created. Let's talk/track it there. thanks > On Mar 5, 2025, at 16:58, jaeyong yoo wrote: > > Yes it is data retransmission but my concern is that the > retransmission packet has the segment length of zero. > If ther

Re: Sending empty segment upon receiving partial ACK

Yes it is data retransmission but my concern is that the retransmission packet has the segment length of zero. If there is nothing to send, why don't we just not send it. What I meant by "no packets going out" is, that zero-length-segment can be considered as ACK to acknowledge some received packe

Re: Sending empty segment upon receiving partial ACK

> On Feb 26, 2025, at 10:21, jaeyong yoo wrote: > > Yes that behavior was observed during recovery phase and during that > time frame, there were no packets going out to the other direction so > there is no reason to send pure ACK (and the ack number for those 3 > acks are the same and no possi

Re: Sending empty segment upon receiving partial ACK

Thanks for your reply Cheng! Yes that behavior was observed during recovery phase and during that time frame, there were no packets going out to the other direction so there is no reason to send pure ACK (and the ack number for those 3 acks are the same and no possibility of challenge ack as well)

Re: Sending empty segment upon receiving partial ACK

> On Feb 18, 2025, at 12:11, jaeyong yoo wrote: > > Hi freebsd-net, > > I am observing somewhat strange pcap behavior. > Scenario: > A --> B > A is the only sender of the data and B is the only receiver. Note that > we use PRR. > When B is sending partial ACKs to A, there are cases when A se

Sending empty segment upon receiving partial ACK

Hi freebsd-net, I am observing somewhat strange pcap behavior. Scenario: A --> B A is the only sender of the data and B is the only receiver. Note that we use PRR. When B is sending partial ACKs to A, there are cases when A sends out just an empty segment with the same sequence number to B. Whi