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Re: [tcpm] Francesca Palombini's No Objection on draft-ietf-tcpm-rfc793bis-25: (with COMMENT)

Jeremy Harris <jgh@wizmail.org> Thu, 23 September 2021 08:37 UTC

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Subject: Re: [tcpm] Francesca Palombini's No Objection on draft-ietf-tcpm-rfc793bis-25: (with COMMENT)
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On 22/09/2021 22:19, Francesca Palombini via Datatracker wrote:
>     2.  (Close)                                              (Close)
>         FIN-WAIT-1  --> <SEQ=100><ACK=300><CTL=FIN,ACK>  ... FIN-WAIT-1
>                     <-- <SEQ=300><ACK=100><CTL=FIN,ACK>  <--
>                     ... <SEQ=100><ACK=300><CTL=FIN,ACK>  -->
> 
>     3.  CLOSING     --> <SEQ=101><ACK=301><CTL=ACK>      ... CLOSING
>                     <-- <SEQ=301><ACK=101><CTL=ACK>      <--
>                     ... <SEQ=101><ACK=301><CTL=ACK>      -->
> 
> I am confused why in this case, in line 3, ACK does in fact occupy sequence
> number space. What am I missing?

FIN occupies sequence space.
-- 
Cheers,
   Jeremy

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