I did once have a use for this in an o/s of mine, in a sort of network pipe
to servers, but it was so variably implemented by other systems (data was
flushed, or not) I gave it up as not particularly useful in practice,
except between two known systems that did what you wanted.

On 4 February 2017 at 09:58, Charles Forsyth <charles.fors...@gmail.com>

> On 4 February 2017 at 01:56, Skip Tavakkolian <skip.tavakkol...@gmail.com>
> wrote:
>> Shutting down the write-end (i.e. 'shut_wr'), should send FIN, and
>> transition to Finwait1.
> i'd make it a "read" or "write" parameter to the existing "hangup"
> message. older implementations that don't accept the parameter will give an
> error on the request because the current tcp.c doesn't accept a parameter

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