Re: use of radiotap bit 14?

Loris Degioanni wrote:

> AirPcap uses the IEEE80211_RADIOTAP_FCS flag. We can remove it, but all 
> the trace files produced with airpcap+radiotap until now include it.

Oh, well.

Is it time to either rev the version number or pick a new DLT_ for 
"standard" radiotap?

That doesn't help with existing captures - we'd probably have to add a 
preference setting to control how to interpret bit 14 (and bits 15 and 
16, if we ever add support for them, given that there's a collision 
between the NetBSD and OpenBSD uses of them) - but it'd at least give us 
a new DLT_ or version number value to use in the future, and anybody who 
wants tcpdump or Wireshark to interpret any presence bits in a 
non-standard fashion in files with that DLT_ value/version number can be 
politely told "no, ask for an assignment from the radiotap list".