regdomain.xml

[Aaron]

On 7/21/2020 5:41 PM, Adrian Chadd wrote:
> (cc'ing the list again, hehe :-)
> On Tue, 21 Jul 2020 at 14:35, Aaron <notjanedeere at gmail.com 
> <mailto:notjanedeere at gmail.com>> wrote:
>
>     On 7/21/2020 5:33 PM, Adrian Chadd wrote:
>
>>     Ok. Please do dig into it.
>>
>>     Do try to treat the regdomain code as a black box - input is
>>     "what regulatory domain do we want" and the output is "a list of
>>     channels and properties of those channels that we currently
>>     program into net80211." Hopefully we don't have to change the
>>     net80211 channel API!
>     This is the sort of information I'm looking for!  So far all I'm
>     looking at is an XML file.  Where would I find the "regdomain code"?
>
>
> (We really should write a page in the wiki about regdomain stuff.)
>
> So, here's my suggestion:
>
> * get freebsd with a supported wifi card
> * look at what happens when you type "ifconfig wlan0 create wlandev 
> XXX"; and then "ifconfig wlan0 regdomain FCC3"
> * .. see what it does with the channel programming in 
> src/sbin/ifconfig/ and src/lib/lib80211/
> * Also 'ifconfig wlan0 list sta" and "ifconfig -v wlan0 list sta"
>
> in src/sbin/ifconfig/ifieee80211.c look at 
> setdefregdomain(), setregdomain_cb(), print_channels() and list_channels()
>
> * print_channels() queries net80211 for the list of channels
> * list_channels() calls it :-)
> * setregdomain_cb() sucks in the lib80211 regdomain code, does a bunch 
> of hijinx, and then calls into net80211 using the 
> IEEE80211_IOC_REGDOMAIN ioctl to set the sku/country and the channel list.
>
>
>
> -adrian

So much for limiting myself to XML parsing.  I'll grab some source files 
and take a look, I can code but might be too removed from what's being 
done here to get my ahead around it.  Thanks all.