hostapd with Apple devices

[Krishna Chaitanya]

On Thu, Jun 5, 2014 at 8:38 PM, les paul <rw81junk at gmail.com> wrote:
>
> Hi all,
>
> I posted this yesterday but did not provide enough information. I've been banging my head for days trying to get this working and have tried every reasonable setting in hostapd.conf.
>
> I'm using hostapd 2.2 (2.1 before yesterday), TP-Link TL-WN822N USB wifi, Ubuntu 14.04 Server up-to-date.
>
> Problem: Apple devices (iPad/iPhone) do not connect, but Windows 7 works great.
>
> If anyone has successfully gotten an Apple device to connect to hostapd, please let me know what settings/hardware you're using so I can replicate it.
>
> This is what happens when I try to connect with my iPhone 4S:
>
> # ./hostapd /etc/hostapd/hostapd.conf
> Configuration file: /etc/hostapd/hostapd.conf
> wlan0: interface state UNINITIALIZED->COUNTRY_UPDATE
> Using interface wlan0 with hwaddr c0:4a:00:1c:99:c7 and ssid "rwtest1"
> wlan0: interface state COUNTRY_UPDATE->ENABLED
> wlan0: AP-ENABLED
> wlan0: STA d0:23:db:45:7a:90 IEEE 802.11: authenticated
> wlan0: STA d0:23:db:45:7a:90 IEEE 802.11: associated (aid 1)
> wlan0: AP-STA-CONNECTED d0:23:db:45:7a:90
> wlan0: STA d0:23:db:45:7a:90 RADIUS: starting accounting session 53908690-00000000
> wlan0: STA d0:23:db:45:7a:90 WPA: pairwise key handshake completed (RSN)
> wlan0: AP-STA-DISCONNECTED d0:23:db:45:7a:90
> wlan0: STA d0:23:db:45:7a:90 IEEE 802.11: disassociated
> wlan0: STA d0:23:db:45:7a:90 IEEE 802.11: deauthenticated due to inactivity (timer DEAUTH/REMOVE)

Can you share the time after which connection disconnects? (run
hostapd with -t option for timestamps)
Is the keepalive triggered from hostapd/Apple device/
If you keep some ping running, do you still see the issue?
Can you capture the sniffer trace when the issue occurs?

When "probes" are used for keepalive Some STA/AP's do not consider
then for resetting inactivity timer, and can cause the disconnection.

Instead if we use "qos null data" for keepalive we will see that the connection
remains active.