dhclient and wpa_supplicant
Sam Leffler
sam at errno.com
Sat Jul 30 18:20:48 GMT 2005
Ben Kaduk wrote:
> 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
>>_______________________________________________
>>freebsd-current at freebsd.org mailing list
>>http://lists.freebsd.org/mailman/listinfo/freebsd-current
>>To unsubscribe, send any mail to "freebsd-current-unsubscribe at freebsd.org"
>>
>
>
>
> 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
add weptxkey 1 or deftxkey 1--note "deftxkey UNDEF" above.
>
> 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.
There's supposed to be an update coming to the wireless setup section of
the freebsd handbook. I'd also like to see sysinstall do a better job
of setting up wireless interfaces (until the new installer is ready) and
I lobbied for a SoC project to build a GUI app to do this but w/o luck.
Setting up wpa_supplicant is actually not too bad; you just need an
/etc/wpa_supplicant.conf file that describes the networks you hook up
to. If you look in /usr/src/contrib/wpa_supplicant/wpa_supplicant.conf
there's an extensive set of examples you should be able to crib from.
Test things by running wpa_supplicant directly with something like:
wpa_supplicant -i ath0 -d -c /etc/wpa_supplicant.conf
and when you're happy configure stuff to start automatically by adding a
line to /etc/rc.conf like:
ifconfig_ath0="WPA DHCP"
The trickiest part is configuring 802.1x. I'm not sure how well ndis
drivers hookup to these tools. The only driver I know works well in all
configurations is ath.
>
> Thanks for putting in all this effort.
>
> Ben Kaduk
>
>
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