question about cfg80211_inform_bss()

question about cfg80211_inform_bss()

[Holger Schurig]

Hi !

I did implement the cfg80211 scan command in libertas. Now I'm 
about to submit the results back to cfg80211. AFAIK I have to 
use cfg80211_inform_bss() for this.

There's just one subtle problem here:

I tell the firmware of libertas card to scan on some channels, 
e.g. on 4 channels at a time. The firmware does this, and then 
sends me back a scan response. This scan response may contain 
any number of APs, from different channels. I don't know which 
BSS entry belongs to which channel --- unless I parse the 
also-supplied IE.

However, cfg80211_inform_bss() want's a channel. And it wants the 
IEs as well. A presume it scans those IEs, too. So do we need to 
parse the IEs twice?

-- 
http://www.holgerschurig.de

Re: question about cfg80211_inform_bss()

[Dave]

Holger Schurig wrote:
> However, cfg80211_inform_bss() want's a channel. And it wants the 
> IEs as well. A presume it scans those IEs, too. So do we need to 
> parse the IEs twice?

That is what orinoco does.

It's slightly worse for non-WPA firmware on orinoco. They supply ssid
and supported rates in a structure, and don't give access to the
original IEs - so the driver has to reconstruct the approporiate IE as
best it can, so cfg80211 can export them (all in orinoco/scan.c).



Dave.