On Monday 14 February 2005 09:01, Charles M. Hannum wrote:
> will fail to notice that we're using the persist timer (because we have a 0
> window) and will arm the rexmt timer.

In case it wasn't clear: we're using the persist timer because we have a 0 
window; the reason we fail to notice we're using the persist timer is that 
TCP_TIMER_ISARMED() looks for CALLOUT_PENDING, which is no longer set.