How to force a thread to stop

[Paul Rubin]

"Paul Boddie" <paul at boddie.org.uk> writes:
> Whether this solves the questioner's problems remains to be seen, but
> issues of handling SSH-based communications streams do seem to be
> addressed.

Actually I don't understand the need for SSH.  This is traffic over a
LAN, right?  Is all of the LAN traffic encrypted?  That's unusual; SSH
is normally used to secure connections over the internet, but the
local network is usually trusted.  Hopefully it's not wireless.