Re: technology preview: scan with cfg80211

["Tomas Winkler" <tomasw@gmail.com>]

On Fri, Sep 19, 2008 at 11:56 AM, Johannes Berg
<johannes@sipsolutions.net> wrote:
> On Fri, 2008-09-19 at 11:03 +0300, Tomas Winkler wrote:
>> On Fri, Sep 19, 2008 at 6:41 AM, Johannes Berg
>> <johannes@sipsolutions.net> wrote:
>> > On Fri, 2008-09-19 at 05:18 +0200, Johannes Berg wrote:
>> >> This is totally incomplete:
>> >>
>> >> cfg80211 needs to
>> >>  * actually hash on the BSSID instead of putting things into a list
>> >>  * provide BSS list functions so mac80211 need not keep track
>> >>  * allow a "private" area in each scan result with hw-provided size
>> >>  * handle mesh properly
>> >>  * provide a way for the hw to limit the number of SSIDs in a scan
>
>> Don't understand this requirement?
>
> Limiting the number of SSIDs? Well I don't want to have userspace
> request an active scan for like 100 SSIDs, which currently _is_ possible
> (mac80211 will reject anything but 1 right now though). Hence, I want to
> have a "max probes" or something like that in the wiphy structure that
> we can use (a) tell userspace how many we support and (b) limit the
> number appropriately.
>
>>   * provide a way to limit the number of channels in a scan (for
>> faster roaming candidate search)
>
> Hey, unfair! ;) I did leave a lot of TODOs but this wasn't one of them.
> You can provide a channel list and it'll scan only those (except hw scan
> right now but that'll be fixed once we pass the scan request struct
> through)

Agree, this would be the correct approach.
Tomas