Hello,
I'm not sure if the fault is hostapd or the wireless stack (or something else),
but this is what I see:
I put an AP on channel 100, configured for RRM.
STA associates to it and sends a channel report request.
hostapd reports tx of the response frame failed with EBUSY (-16).
Debugging in the kernel (4.20.8+ hacks) shows it fails because
of the offchannel check. This appears to be because hostapd marks
the frame as off-channel-OK, and nl80211 fails because of the
CAC logic (I think):
static bool cfg80211_off_channel_oper_allowed(struct wireless_dev *wdev)
{
ASSERT_WDEV_LOCK(wdev);
if (!cfg80211_beaconing_iface_active(wdev))
return true;
if (!(wdev->chandef.chan->flags & IEEE80211_CHAN_RADAR))
return true;
return regulatory_pre_cac_allowed(wdev->wiphy);
}
In this case, the packet is not actually off-channel, and CAC has already
completed successfully.
Any opinions on where to fix this?
Thanks,
Ben
--
Ben Greear <[email protected]>
Candela Technologies Inc http://www.candelatech.com
