> > libpcap does not need to be modified; it works already for
> > wireless. The fact that the DLT is named DLT_IEEE802_11_RADIO is a
> > bit of a misnomer; it's not entirely 802.11-specific.
> Ah, you mean we just exploit DLT_IEEE802_11_RADIO. Hmm... How about
> processing overhead? Can we synchronize the timestamping with system
> time?
It sounds to me like a reasonable thing to do would be to pass up
a raw version of the timestamp (as returned by the hardware). We'd
also pass up the regular microtime() timestamp. You can then do any
postprocessing to syncronise timestamps later in userland?
> Okay. But I am worried about timecounter <-> timeval conversion
> because I want to know timeval delta from system time, not just some
> timer value.
If we do it in the kernel, then we probably need to look into
expanding the timecounter infrastructure quite a lot, particularly
if you want to be able to apply NTP adjustments to multiple counters
at the same time.
David.
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