From: Kalle Valo <kalle.valo@nokia.com>
To: "Tomas Winkler" <tomasw@gmail.com>
Cc: "Michael Buesch" <mb@bu3sch.de>,
"Luis R. Rodriguez" <mcgrof@gmail.com>,
"linux-wireless\@vger.kernel.org"
<linux-wireless@vger.kernel.org>
Subject: Re: No ProbeResp - assume out of range
Date: Mon, 03 Nov 2008 09:19:32 +0200 [thread overview]
Message-ID: <87prldb7jv.fsf@nokia.com> (raw)
In-Reply-To: <1ba2fa240811021442o178c98a1pa920b863b60d9293@mail.gmail.com> (ext Tomas Winkler's message of "Mon\, 3 Nov 2008 00\:42\:48 +0200")
Tomas Winkler <tomasw@gmail.com> writes:
>> mac80211 immediately assumes the connection is broken, if one probe-resp
>> to a keekalife-proberequest is lost.
>> So if you scan just after the request got sent, you'll never receive the response
>> and mac80211 will terminate the connection.
>> It should try a few times, instead, before blowing up things.
>
> I've seen this happening in high traffic with some APs but it can be
> also NIC issue. It needs to really investigate the sniffer capture I
> wouldn't assume its only mac80211 issue. Probe is issued only when RX
> is not received for some time so there is some problem, nevertheless
> monitoring beacons is a better approach from my experience.
I agree, monitoring received beacons and the number of failed
transmissions would be better. But on the other hand some broken APs
might work better if we periodically send frames to them.
--
Kalle Valo
next prev parent reply other threads:[~2008-11-03 7:19 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-02 21:05 No ProbeResp - assume out of range Luis R. Rodriguez
2008-11-02 22:03 ` Michael Buesch
2008-11-02 22:29 ` Luis R. Rodriguez
2008-11-02 22:52 ` Michael Buesch
2008-11-02 22:42 ` Tomas Winkler
2008-11-02 22:58 ` Luis R. Rodriguez
2008-11-03 0:25 ` Luis R. Rodriguez
2008-11-03 16:48 ` Felix Fietkau
2008-11-03 17:50 ` Johannes Berg
2008-11-04 5:32 ` Bharat Bhushan
2008-11-04 7:05 ` Kalle Valo
2008-11-04 6:58 ` Kalle Valo
2008-11-04 11:17 ` Michael Buesch
2008-11-04 12:43 ` Bob Copeland
2008-11-03 7:19 ` Kalle Valo [this message]
2008-11-02 22:33 ` Davide Pesavento
2008-11-04 18:19 ` Christoph Hellwig
2008-11-04 19:15 ` Luis R. Rodriguez
2008-11-05 10:30 ` Kalle Valo
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