[PATCH] Use BSS expiration age as fast association threshold

[Paul Stewart]

On Thu, Feb 28, 2013 at 6:37 AM, Jouni Malinen <j at w1.fi> wrote:
> On Tue, Feb 26, 2013 at 10:36:00PM +0900, Masashi Honma wrote:
>> diff --git a/wpa_supplicant/events.c b/wpa_supplicant/events.c
>> @@ -1344,7 +1344,7 @@ int wpa_supplicant_fast_associate(struct
>
>> -    if (now.sec - wpa_s->last_scan.sec > 5) {
>> +    if (now.sec - wpa_s->last_scan.sec > wpa_s->conf->bss_expiration_age) {
>>          wpa_printf(MSG_DEBUG, "Fast associate: Old scan results");
>
> This would change the default behavior to use up to 180 seconds old scan
> results to avoid the new scan. I don't think I want to go that far as
> the default behavior.. Scan results may have changed considerably and
> BSS or even network selection is not really going to be ideal if the
> device has moved.

Moreover, AFAIK the information needed in cfg80211 to perform association
expires fairly quickly, so it doesn't take long before a fast-associate will
fail anyway and necessitate a scan anyway.

>
> --
> Jouni Malinen                                            PGP id EFC895FA
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