Re: py80211 update on github

[Arend van Spriel <arend@broadcom.com>]

On 01/06/2014 11:36 AM, Johannes Berg wrote:
> On Mon, 2014-01-06 at 10:30 +0100, Arend van Spriel wrote:
> 
>> In the christmas holiday I tinkered a bit more on py80211. It comes with
>> a utility to extract definitions and netlink policies from the nl80211
>> source files. What is currently on github is in prototype state. It can
>> retrieve all wiphy information including band, frequency and rate
>> information. It relies on policy information and it turned out that not
>> all attributes are properly initialized in nl80211_policy. One that I
>> added manually is NL80211_ATTR_SUPPORTED_IFTYPES, which should actually
>> be typed as NLA_NESTED. There are other attributes that are not covered yet.
> 
> This makes sense because the kernel policy only covers things that are
> sent *to* the kernel. In some very rare cases, the stuff sent *to* the
> kernel and *by* the kernel may even differ, so you may have to add some
> special cases.

Yeah, I realized that indeed the policies in the kernel only cover
validation *to* the kernel. In iw the policies are used rarely and most
type information is covered in the code. py80211 relies on policies to
obtain the type information and I was hoping to extract it from the
kernel/iw code. I may end up maintaining it in py80211.

Gr. AvS

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