Re: [tcpinc] TCP's treatment of data in SYN packets

[Jeremy Harris <[e-mail]>]

On 01/08/16 08:36, David Mazieres wrote:
> 4.7.  Data in SYN segments
[...]
>    A host implementing ENO, even if ENO has been disabled by
>    configuration, MUST discard the data in a received SYN+ENO segment if
>    any of the following applies:
[...]
>    A host MUST NOT acknowledge the sequence number of any discarded SYN
>    data, but rather MUST acknowledge the other host's initial sequence
>    number as if the received SYN segment contained no data.
>    Furthermore, a host MUST NOT assume discarded SYN data will be
>    identically retransmitted.  If later non-SYN segments contain
>    different data for the same sequence numbers as SYN data, the host
>    MUST process only data from non-SYN segments.

Nit: the last two sentences could be read as specifying behaviour
for discarded SYN data even for either non-SYN+ENO segments or
for non-ENO-implementing hosts.  I don't think those should be
covered.

Otherwise, I think I'm happy.
-- 
Jeremy