I have two points:
1. Documentation?
in wireless-dev/Documentation there is hardly any mentioning of
mac80211. Lest is there any documentation at that place.
2. Scanning
I've backported mac80211 to my 2.6.21.1 kernel (with some help
from
http://intellinuxwireless.org/?p=mac80211&n=HOWTO-mac80211
I'm doing some range tests with a bunch of different cards, one
of the a prism54 based. The prism54pci.ko driver (which uses
mac80211) gives me the following output in dmesg:
p54: LM86 firmware
wmaster0: Selected rate control algorithm 'simple'
phy0: hwaddr 00:10:c6:21:e4:8a, isl3890
HW CONFIG: channel=1 freq=2412 phymode=3
wmaster0: Does not support passive scan, disabled
And of course it doesn't detect any access point. Manually
scannig helps, after "iwlist eth1 scanning" I get some output
from iwlist, and the following lines in dmesg:
HW CONFIG: channel=1 freq=2412 phymode=3
HW CONFIG: channel=2 freq=2417 phymode=3
HW CONFIG: channel=3 freq=2422 phymode=3
HW CONFIG: channel=4 freq=2427 phymode=3
HW CONFIG: channel=5 freq=2432 phymode=3
HW CONFIG: channel=6 freq=2437 phymode=3
HW CONFIG: channel=7 freq=2442 phymode=3
HW CONFIG: channel=8 freq=2447 phymode=3
HW CONFIG: channel=9 freq=2452 phymode=3
HW CONFIG: channel=10 freq=2457 phymode=3
HW CONFIG: channel=11 freq=2462 phymode=3
HW CONFIG: channel=1 freq=2412 phymode=3
HW CONFIG: channel=8 freq=2447 phymode=3
eth1: Initial auth_alg=0
eth1: authenticate with AP 00:13:19:80:da:30
eth1: RX authentication from 00:13:19:80:da:30 (alg=0
transaction=2 status=0)
eth1: authenticated
eth1: associate with AP 00:13:19:80:da:30
eth1: RX AssocResp from 00:13:19:80:da:30 (capab=0x11 status=0
aid=11)
eth1: associated
wmaster0: Added STA 00:13:19:80:da:30
eth1: CTS protection enabled (BSSID=00:13:19:80:da:30)
After this I'm associated and can use the wireless link. But hey,
adding "post-up iwlist eth1 scanning" or something like this is
just a kludge, not a solution. After all, non mac80211 drivers
can do that as well. And this kludge would probably not work in
a mobile scenario, where I constantly have to scan because I
move and my old AP might get out of range and I need to find,
without user intervention, one of the other APs.
So, what is the suggested solution to this problem ?
a) wait until this is finished and working
b) implement some scanning in the prism54common and populate
local->ops->passive_scan function pointer? Hmm, an
grep -rl passive_scan \
wireless-dev/drivers/net/wireless/mac80211
did not reveal anything ... so does currently
no driver can associate/roam?
c) do it from user space. But how, where is the cfg80211
interface documented? Oh, whoops, we're back at
Question 1 from above :-)
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