Date: Tue, 28 Feb 2012 02:38:38 GMT From: Adrian Chadd <adrian@FreeBSD.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/165517: [net80211] bgscan isn't triggered when invalid beacons are being sent Message-ID: <201202280238.q1S2ccfU022573@red.freebsd.org> Resent-Message-ID: <201202280240.q1S2e8aU068176@freefall.freebsd.org>
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>Number: 165517 >Category: kern >Synopsis: [net80211] bgscan isn't triggered when invalid beacons are being sent >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Feb 28 02:40:07 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Adrian Chadd >Release: -CURRENT >Organization: >Environment: 9.0-RELEASE with HEAD net80211/ath >Description: I was trying to figure out why bgscan isn't working in some instances. What's happening is this: * the bgscan is triggered via sta_recv_mgmt(), on a valid beacon frame * but if the beacon frame isn't valid, it fails an earlier check, so the ieee80211_bg_scan() call is never made. >How-To-Repeat: Find an AP whose beacons fail the check. >Fix: * Fix ieee80211_parse_beacon() if it needs to be fixed * potentially ignore the beacon contents _but_ still trigger a background scan if possible. >Release-Note: >Audit-Trail: >Unformatted:
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