[PATCH 2/4] wpa_supplicant: Do not expire scan results based on aborted scan

[Jouni Malinen]

On Wed, Oct 14, 2015 at 12:26:31PM +0300, Ilan Peer wrote:
> Do not expire scan results entries based on scan results from a scan
> that was aborted. The aborted scan did not scan all the requested
> channels or SSIDs, so the fact that a BSS is missing from the scan
> results does not mean it is not available.

I think I was kind of hoping the scanned frequency list to be accurate
for aborted scan, i.e., include only the channels that completed scan
before the operation was terminated. That would have already been
covered in wpa_bss_included_in_scan(), i.e., BSSes missing from the
results would not be expired if that frequency list were accurate..

Looking at the current cfg80211 implementation, it does not look like my
desired behavior is there, i.e., NL80211_ATTR_SCAN_FREQUENCIES is filled
based on the requested channels, not the channels that were actually
scanned. As such, I think I'll apply this to wpa_supplicant. Anyway, it
might be useful to consider a cfg80211 (and drivers, as may be the case)
contribution that would update the frequency list based on what actually
happened with the scan..

-- 
Jouni Malinen                                            PGP id EFC895FA