On 4 February 2017 at 01:56, Skip Tavakkolian <skip.tavakkolian@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