Re: dhclient and wpa_supplicant

On 7/30/05, Sam Leffler <sam_at_errno.com> wrote:
> Brooks fixed a bunch of bugs in dhclient and I just committed an
> important fix to wpa_supplicant to work right when wireless cards are
> ejected (previously it would loop).
> 
> I also tested that dhclient does the right thing for roaming between
> ap's--switching causes dhclient to immediately collect a new lease.
> 
> I just ran tests with wpa_supplicant and found that it does appear to
> handle open ap's properly.
> 
> Everything except the wpa_supplicant changes have been MFC'd to RELENG_6
> for the 6.0RC2 build that's going to happen soon (I'm hoping to get re
> to approve the wpa_supplicant changes).
> 
> So the question is what are the outstanding issues with dhclient and
> wpa_supplicant?  I'm mostly concerned with wireless devices but feel
> free to talk about wired interfaces too.  If something doesn't work
> right please try to give steps to reproduce the problem.  Otherwise
> please provide detailed info include ifconfig output.  Remember that
> dhclient logs info to /var/log/messages and you should also see link
> state change msgs there too.
> 
>         Sam
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> 


Well, I don't know if this is something in the code or just operator
incompotence, but I'm having some problems with dhclient on a wireless
interface.  I've got current from last night:

prolepsis# uname -a
FreeBSD prolepsis.math.uiuc.edu 7.0-CURRENT FreeBSD 7.0-CURRENT #6:
Fri Jul 29 04:30:11 UTC 2005    
kaduk_at_prolepsis.math.uiuc.edu:/usr/obj/usr/src/sys/PROLEPSIS  i386

and I'm trying to connect to a friend's ap using wep.  My ndis card
seems to be recognized just fine:

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: 5.0
ndis0: Ethernet address: 00:90:4b:2d:46:ce

When I issue an:

prolepsis# ifconfig ndis0 inet up ssid 'NetworkXcAe5_at_r' wepmode on
wepkey 0xdeadc0de

my interface associates fine, giving me this:

prolepsis# ifconfig ndis0
ndis0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::290:4bff:fe2d:46ce%ndis0 prefixlen 64 scopeid 0x3
        ether 00:90:4b:2d:46:ce
        media: IEEE 802.11 Wireless Ethernet autoselect
        status: associated
        ssid NetworkXcAe5_at_r bssid 00:12:17:1d:f7:08
        authmode OPEN privacy ON deftxkey UNDEF wepkey 1:40-bit txpowmax 100

but when I run:

prolepsis# dhclient ndis0
DHCPDISCOVER on ndis0 to 255.255.255.255 port 67 interval 8
DHCPDISCOVER on ndis0 to 255.255.255.255 port 67 interval 9
DHCPDISCOVER on ndis0 to 255.255.255.255 port 67 interval 16
DHCPDISCOVER on ndis0 to 255.255.255.255 port 67 interval 9
DHCPDISCOVER on ndis0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on ndis0 to 255.255.255.255 port 67 interval 8
No DHCPOFFERS received.
No working leases in persistent database - sleeping.

prolepsis# ifconfig ndis0
ndis0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet6 fe80::290:4bff:fe2d:46ce%ndis0 prefixlen 64 scopeid 0x3
        inet 0.0.0.0 netmask 0xff000000 broadcast 255.255.255.255
        ether 00:90:4b:2d:46:ce
        media: IEEE 802.11 Wireless Ethernet autoselect
        status: associated
        ssid NetworkXcAe5_at_r bssid 00:12:17:1d:f7:08
        authmode OPEN privacy ON deftxkey UNDEF wepkey 1:40-bit txpowmax 100


dhclient doesn't seem to pick it up.  I know this ap is actually
running a dhcp server; it works on darwin.

I have read that using ifconfig for wireless (encryption?) is not the
way of the future, that I should be using wpa_supplicant, but I
haven't been able to succesfully modify a config file to get it to
work, and google wasn't very helpful in finding a tutorial or
instructions for wpa_supplicant on freebsd.  The archives weren't
terribly helpful, either -- this is something that would be on
freebsd-questions, right?  Anyways, if someone could point me to a
tutorial for wpa_supplicant, I can check that and see if I get better
results, or if you want further information about my configuration, I
can get that too.

Thanks for putting in all this effort.

Ben  Kaduk