Subject: Re: cfg80211 take 7

From: Larry Finger <[email-masked]>
Date: Mon, 09 Oct 2006 09:16:42 -0500

Stefan Rompf wrote:
> Am Montag, 9. Oktober 2006 13:49 schrieb Johannes Berg:
> 
>> Yeah, probably makes sense. Though, maybe not just the band but a set of
>> channels instead?
> 
> Yes, this would allow us to keep the definition of a band out of kernel. But 
> to distinguish between 802.11 b and g, we'd need a set of channels and 
> allowed modulations. I haven't looked at Larry's regulatory domain stuff yet, 
> but maybe band selection could use the same data structure. cfg80211 would 
> then just calculate the intersection of user supplied set and set permitted 
> by regulations.
> 
> Hopefully there is no country that forbids the user *NOT* to scan a specific 
> channel ;)
> 

Passive scanning is always allowed, AFAIK. Active scanning is a different matter. In the US, no one 
is allowed to active scan channels 12-14. In addition, there are a number of countries where the 
regulations prohibit active scanning in some or all of the 5 GHz bands.

Larry