From: Ben Greear <greearb@candelatech.com>
To: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: No beacons generated when you bring ath9k AP interface down and up.
Date: Thu, 13 Jan 2011 23:13:40 -0800 [thread overview]
Message-ID: <4D2FF7A4.3070106@candelatech.com> (raw)
Been a long day, but I think I finally see the problem.
If you have an ath9k AP interface running with hostapd, and you
run: ip link set vap0 down; ip link set vap0 up;
then it will disable beaconing.
One reason is that the ieee80211_do_open calls the
ieee80211_bss_info_change_notify before it sets the RUNNING
flag, so it would disable beaconing. A second is that
it doesn't set the BEACON_CHANGED flag anyway, so even if you
hack things to set RUNNING first, it still doesn't work right.
I'm not sure where the problem actually lies: Should ath9k
start beaconing automatically on VAP interface add? Is
it up to hostapd to detect the ifdown/ifup and re-set everything
up properly? Or maybe it's just a very bad idea to bounce
a VAP interface with 'ip link set'?
Thanks,
Ben
--
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
next reply other threads:[~2011-01-14 7:13 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-14 7:13 Ben Greear [this message]
2011-01-14 8:26 ` No beacons generated when you bring ath9k AP interface down and up Johannes Berg
2011-01-14 9:12 ` Jouni Malinen
2011-01-14 13:22 ` Ben Greear
2011-01-14 14:17 ` Brian Prodoehl
2011-01-14 13:49 ` Jorge Boncompte [DTI2]
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