🚀 go-pugleaf

Thanks.  You refer to a "current tftp spec" which says "Acks
are retransmitted ONLY when the retransmit timer expires".
The most recent tftp spec I'm aware of is rfc783 which says
"If a packet gets lost in the network, the intended recipient
will timeout and may retransmit his last packet (which may be
data or an acknowledgement)".  Is there some later tftp spec?
Where?

Also, the problem we encountered was that 4.2bsd tftp never
retransmitted the ack.  It didn't retransmit in response to
repeated data packets, and it didn't timeout because the data
packets reset the timer.  Given that "acks are only retransmitted
when the timer expires", I can see the problem appears to be
an incorrectly reset timer.

Yep, we're bagging 4.2bsd's tftp, mostly.  A couple of pc's here
are still running a version of tftp assuming 4.2bsd's damaged
netascii.

Thanks again,

Ron
stanonik@nprdc.arpa