Question on status-14 error

[Ben Greear]

On 12/05/2017 04:23 PM, Ben Greear wrote:
> Hello,
>
> We've been doing some tests where we have lots of virtual stations on
> a wave-2 9984 ath10k system, and another linux PC acting as an AP.  hostapd, supplicant,
> and kernels should be fairly recent on all of these, but all of them are modified at least
> a bit from stock software/firmware.
>
> We are restarting the AP over and over and verifying that the
> station system can properly reconnect.
>
> After some time, we see the stations fail to connect, due to status-14.
>
> I have uploaded a pcap here:
>
> http://www.candelatech.com/downloads/err-14.pcapng
>
> One example of this problem is in frames 76 and 77.
>
> Frame 53 and 54 show what appears to be a successful auth attempt.
>
> I have not dug into this in detail yet...but in case someone has
> time to take a look, I'd welcome suggestions as to where the problem
> might lie.

So, I noticed I can restart hostapd and problem persists (I have not restarted
the stations).

It is failing here in handle-auth (I added the debugging):

	if (hapd->tkip_countermeasures) {
		wpa_printf(MSG_DEBUG,
			   "Michael-MIC failure (tkip-countermeasures)");
		resp = WLAN_REASON_MICHAEL_MIC_FAILURE;
		goto fail;
	}


One thing, the resp here is assigned to a REASON code instead of a status, which seems
to be one bug.  What is the proper status code for this?

I don't yet know why tkip_countermeasures is true...

Thanks,
Ben


-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com