iwi, hidden SSID and wpa_supplicant problem

[Goran Lowkrantz]

Hi,

Reporting back after a few days with the patch. The connect and switching 
between accesspoints work but there are still a few down/up events, about 
once every two hours but that may have somthing to do with the dhcp cleint. 
At the moment, the number of lease renewals match the number of link 
down/up events. I leave this to the clever folks. When running from the em 
interface, I do not see any down/up at all and thet net uses the same DCHP 
server etc.

iwi0: link state changed to DOWN
iwi0: link state changed to UP
iwi0: link state changed to DOWN
iwi0: link state changed to UP
iwi0: link state changed to DOWN
iwi0: link state changed to UP
iwi0: link state changed to DOWN
iwi0: link state changed to UP
iwi0: link state changed to DOWN
iwi0: scan stuck
iwi0: link state changed to UP

/glz

--On Tuesday, October 10, 2006 05:04:46 +0200 Max Laier 
<max at love2party.net> wrote:

> On Monday 09 October 2006 20:26, Max Laier wrote:
>> On Monday 09 October 2006 19:53, Andrew N. Below wrote:
>> > Hi.
>> >
>> > [..]
>> >
>> > > You can try using ap_scan=2 or whatever it is in the
>> > > wpa_supplicant.conf file.  This causes wpa_supplicant to use
>> > > directed broadcasts msgs to each ap listed in the file.
>> >
>> > In my case setting ap_scan to 2 doesn't help.
>> >
>> > BTW, I got successfull connection some time ago when I
>> > start to use /etc/rc.d/netif start iwi0 instead of manual
>> > running of wpa_supplicant:
>> >
>> > defanbook# ifconfig iwi0
>> > iwi0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>> >         inet 213.189.198.75 netmask 0xfffffff0 broadcast
>> > 213.189.198.79 ether 00:12:f0:3d:cd:58
>> >         media: IEEE 802.11 Wireless Ethernet autoselect mode 11b
>> > (DS/11Mbps) status: associated
>> >         ssid ZENON-RADIO channel 11 bssid 00:07:0e:b8:d8:ee
>> >         authmode WPA privacy ON deftxkey UNDEF TKIP 2:128-bit TKIP
>> > 3:128-bit txpowmax 100 bmiss 10 protmode CTS roaming MANUAL bintval
>> > 100
>> >
>> > I wrote bssid value to /etc/wpa_supplicant.conf and run
>> > /etc/rc.d/netif.
>> >
>> > Then I drop connection (netif stop iwi0) and tried to start it again.
>> > I got "associated" state in 5-6 minutes.
>> >
>> > In rc.conf I have:
>> >
>> > ifconfig_iwi0="ssid MY-SSID channel 11 WPA
>> >
>> > How can I get "-dd" output from wpa_supplicant started with netif?
>> > It could be interesting.
>>
>> No idea, but a bit more stress testing did reveal a similar problem
>> here. After I associated with the AP w/ hidden SSID I changed the
>> channel via webinterface.  The disconnect resulted in the exact problem
>> you were having.  Only stopping and restarting wpa_supplicant fixed the
>> issue and I got associated on the new channel.  Not sure what happens
>> there yet, but something seems to get stuck in an undefined state.
>
> Could you try the attached - untested - patch?  It seems - from looking
> at  the linux driver - that we have to remind the firmware of the ESSID
> before doing a directed scan.  That explains why it would sometimes work
> (whenever we are coming straight from iwi_config) and sometimes not.
>
> Let me know if that improves things for you.  Thanks.
>
> --
> /"\  Best regards,                      | mlaier at freebsd.org
> \ /  Max Laier                          | ICQ #67774661
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  Goran Lowkrantz <goran.lowkrantz at ismobile.com>
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