wpa_supplicant limitation with a large number of APs.

Jouni Malinen jkmaline
Thu Feb 24 20:08:44 PST 2005

On Fri, Feb 25, 2005 at 11:56:52AM +0800, YenJung Chang wrote:

> wpa_supplicant has problem to connect to a connecting available AP if
> the AP is not in the
> scanned result. 
> This problem would happen in the environment with much APs over than about 20. 
> The memory size of passing scanning result between wpa_supplicant and driver is 
> 4096, and the total number of APs can passed is only about 20.

That's not true with the latest wpa_supplicant version; or well, at
least it is not true for the drivers that use wireless extensions for
getting scan results. Yes, there is still a limit, but it is not 4k or
20 APs.

> Is it possible that wpa_supplicant tries to connect to target AP
> regardless of scanning result?

Yes, if the driver supports ap_scan=2 mode, wpa_supplicant does not need
to request scan results. Another option is to use scan_ssid=1 option to
limit the scan to one SSID.

Jouni Malinen                                            PGP id EFC895FA

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