WPS with many WPS enabled APs

Patrik Lahti plahti
Thu Jun 17 13:24:26 PDT 2010

On 10-06-17 03:45 PM, Jouni Malinen wrote:
> On Thu, Jun 17, 2010 at 03:20:34PM -0400, Patrik Lahti wrote:
>> One thing that I'm wondering about is: It seems that wpa_supplicant
>> takes scan results and attempts to do the WPS exchange with APs with
>> "[WPS]" in the scan results in the order they appear. I.e. it'll attempt
>> the first WPS AP a few times, and if that fails it'll move on the next
>> WPS AP, and so on...
>> The potential problem is that when there are many APs with announcing
>> [WPS] it may take a while to get to the actual AP which I've punched in
>> the PIN number into, and so it might time out...
>> Is this just a known limitation of WPS? Is this the fault of the driver
>> presenting the scan results in the wrong way? Or not presenting
>> up-to-date scan results as expected by wpa_supplicant? Or is there an
>> improvement to wpa_supplicants scanning algorithm that's possible?
> It is a workaround that is unfortunately needed with some of the
> deployed WPS APs.. There are some optimizations to this in the current
> development tree that will hopefully improve the likelihood of the
> correct AP being selected more quickly. Furthermore, there is ongoing
> work to improve this.

I see, no worries,

Thank you very much Jouni!

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