ndis0 does not associate to open AP

Hi all,

My apologies if this is not the best list to which to send this. I've been
trying to get my dell laptop's built-in wireless card to work with my
university's wireless network for quite some time now, but nothing I try
seems to work. This is on a recent -current:
# uname -a
FreeBSD prolepsis.urh.uiuc.edu <http://prolepsis.urh.uiuc.edu>
7.0-CURRENTFreeBSD
7.0-CURRENT #15: Sat Oct 8 01:02:04 UTC 2005
kaduk_at_prolepsis.urh.uiuc.edu:/usr/obj/usr/src/sys/PROLEPSIS
i386

The university's setup, so far as I can tell, is as follows: They have all
access points open for association, but do not allow access to the outside
world -- when an http page is first requested, the request is intercepted
and substituted with a university page that has a link to a kerberos-based
authentication, or directions on how to use their vpn client. After
authentication, the protocol used is IPSec over UDP. The main point is that
the access points are open and running dhcp servers, as confirmed on my
iBook (on which I'm writing this message).
However, when I try to use the ndis driver on my dell to try to associate
with this AP and run dhclient, I get far-from-desireable results.
I am using recent (~2 week old) windows xp drivers for my broadcom (4324?)
card and I have regenerated bcmwl5_sys.ko after my latest buildworld, using
ndisgen(8). The wireless card is listed in pciconf -lv as:
ndis0_at_pci2:3:0: class=0x028000 card=0x00011028 chip=0x432414e4 rev=0x02
hdr=0x00[possibly more off screen]
vendor = 'Broadcom Corporation'
device = 'BCM4309 802.11a/b/g Wireless LAN Controller'
class = 'network'

In windows XP, this card is able to successfully associate with the
university AP.

The bcmwl5_sys.ko module produced by ndisgen seems to load successfully:
# kldload bcmwl5_sys
warning: KLD '/boot/modules/bcmwl5_sys.ko' is newer than the linker.hintsfile
ndis0: <Dell TrueMobile 1400 Dual Band WLAN Mini-PCI Card> mem
0xfaff6000-0xfaff7fff irq 9 at device 3.0 on pci2
ndis0: NDIS API version: 5.1
ndis0: Ethernet address: 00:90:4b:2d:46:ce
#


I can then scan and see (several) APs:
#ifconfig ndis0 up scan
SSID BSSID CHAN RATE S:N INT CAPS
UIUCnet [bssid1] 1 54M 151:0 100 E [5x ???] WME VEN VEN
UIUCnet [bssid2] 6 54M 120:0 100 E [5x ???] WME VEN VEN WME
UIUCnet [bssid3] 36 54M 130:0 100 E ??? ??? WME VEN VEN

I can then try to associate to one (the same one that my iBook picks by
default):
# ifconfig ndis0 ssid UIUCnet bssid [bssid1]
# ifconfig ndis0
ndis0: flags=8843<UP,BROADCAST,RUNNING,SIMPLES,MULTICAST> mtu 1500
inet6 fe80::290:4bff:fe2d:46ce%ndis0 prefixlen 64 scopeid 0x4
ether 00:90:4b:2d:46:ce
mdeia: IEEE 802.11 Wireless Ethernet autoselect
status: no carrier
ndis0: failed to get bssid
ssid "" channel 1
authmode OPEN privacy OFF txpowmax 100 protmode CTS
#
(The "failed to get bssid" bit is the console log)

The result is the same whether or not I have a dhclient attached to ndis0.


Am I doing something stupid, or missing something obvious? I can get more
info if necessary.

Thanks

Ben Kaduk