On Sun, 06 Mar 2011 22:34:03 EST erik quanstrom <[email protected]> wrote:
> > > there may be some controls determining how soon to turn
> > > off the wifi that may be of some help.
> >
> > You don't need to mess with the wifi. Just do
> >
> > $ sysctl -w net.inet.tcp.always_keepalive=0
> >
> > This will prevent the stack from sending any keepalive packets
> > on its own. But this will *not* help if the higher level
> > protocol generates such packets.
>
> i don't think that does what you think it does. the timers
> on the plan 9 side will keep running.
Don't know about plan9.
This setting works for ssh, xterm etc. between *BSD/Mac and I
think Linux (Windows forcibly terminates everything when the
link goes down -- there may be a setting to disable keepalives
but I try not to know more about Windows).
>From RFC1122:
4.2.3.6 TCP Keep-Alives
Implementors MAY include "keep-alives" in their TCP
implementations, although this practice is not universally
accepted. If keep-alives are included, the application MUST
be able to turn them on or off for each TCP connection, and
they MUST default to off.
