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authorDenton Gentry <dgentry@google.com>2016-08-15 04:42:49 (GMT)
committerJouni Malinen <j@w1.fi>2016-09-21 21:45:24 (GMT)
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taxonomy: Store Probe Request frames in hostapd_sta_info
A weakness in the initial client taxonomy mechanism is from storing both the Probe and Associate in struct sta_info. struct sta_info is created after a client associates (or starts authentication frame exchange), which means that any Probe Request frames sent prior to association are not retained. The Associate Request frame has to be seen, and then another Probe Request frame after association, before we have a signature for the client. Most clients send lots of Probe Request frames (lots and lots and lots of Probes, actually), but a few do not. ChromeOS is notably sparing in sending Probe Request frames, it can take a long time before a signature for a ChromeOS device is available. Store the most recent Probe Request frame in struct hostapd_sta_info tracking list. When a struct sta_info is created, move the Probe Request frame information from struct hostapd_sta_info to struct sta_info. Signed-off-by: dgentry@google.com (Denton Gentry) Signed-off-by: denny@geekhold.com (Denton Gentry) Signed-off-by: rofrankel@google.com (Richard Frankel) Signed-off-by: richard@frankel.tv (Richard Frankel)
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