WPA Association with wext versus hostap

Ram ramprasad.rajendran
Thu May 31 22:34:19 PDT 2007

Aric D. Blumer wrote:
> I didn't see anything relating to this problem in bugzilla, so I'd like
> to bounce it off the list:
> I have a D-Link DI-524 access point.  I am connecting to it with a
> Prism-based AmbiCom WL1100C-CF 802.11b card.  This is with Linux kernel
> version 2.6.15 on a PXA255-based handheld computer with wpa_supplicant
> 0.4.9.
> If I do "wpa_supplicant  -d -D wext -i wlan0 -c
> /etc/wpa_supplicant.conf" it associates with the DI-524 just fine. 
> However, if I do "wpa_supplicant  -d -D hostap -i wlan0 -c
> /etc/wpa_supplicant.conf" it will not associate.  That last bit of info
> I see is:
> wpa_driver_hostap_set_key: alg=TKIP key_idx=0 set_tx=1 seq_len=6 key_len=32
> EAPOL: startWhen --> 0
> EAPOL: txStart
> WPA: drop TX EAPOL in non-IEEE 802.1X mode (type=1 len=0)

I don't know if your problem is the same. I did try with a Dlink WI-524 
with WPA2-PSK as the authentication and wpa_supplicant 0.5.7

What I did notice was that the AP was sending EAPOL Key packets where 
key data length was not multiples of 8.

In other words, this piece of code

		if (keydatalen % 8) {
			wpa_printf(MSG_WARNING, "WPA: Unsupported "
				   "AES-WRAP len %d", keydatalen);
			return -1;

in wpa_supplicant_decrypt_key_data() in wpa.c was failing.

> It then times out and tries again.
> Anyone have any idea why the wext wap_supplicant driver would work, and
> the hostap driver would not?
> Thanks.
> _______________________________________________
> HostAP mailing list
> HostAP at shmoo.com
> http://lists.shmoo.com/mailman/listinfo/hostap


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