aircrack-ng doesn't work after kernel upgrade

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moment92 · Post by **moment92** » Thu Aug 26, 2010 3:32 pm

I upgraded from kernel 2.6.34-r1 to 2.6.35-r4. After that aircrack-ng doesn't work. It says, that wlan0 is fixed on channel -1 and I can't change that channel. Because of it dumping of data does not work correctly and aireplay-ng does nothing at all.

I use Atheros5007EG wireless device and ath5k driver.

I solved the problem temporarily by switching back to the old kernel. Iis there anything I can do in order to use the new one and still work with aircrack-ng?

idella4 · Post by **idella4** » Thu Aug 26, 2010 7:21 pm

emerge wpa_supplicant, follow the guides et the gentoo wiki to set it up.
It should put it in order or point you to the kernel fault.
How did you upgrade the kernel?

moment92 · Post by **moment92** » Fri Aug 27, 2010 9:25 am

How did you upgrade the kernel?

I upgraded it manually, without genkernel.

emerge wpa_supplicant, follow the guides et the gentoo wiki to set it up.
It should put it in order or point you to the kernel fault.

I already have wpa_supplicant and it is also set up correctly and working. Anyway, I actually can't see how this is relevant. Aircrack-ng doesn't need it, it even suggests to kill wpa_supplicant before doing anything.

I am not sure, the problem could also be in the aircrack-ng and not in the new kernel.

chithanh · Post by **chithanh** » Fri Aug 27, 2010 12:15 pm

For legacy software that still uses wireless extensions you have to enable nl80211 wext compatibility.

Code: Select all

CONFIG_CFG80211_WEXT=y

But I think aircrack-ng supports nl80211 at least as long as net-wireless/iw is installed

moment92 · Post by **moment92** » Thu Sep 02, 2010 3:32 pm

nl80211 wext compatibility is enabled in kernel configs and I also have net-wireless/iw installed, but the problem remains.

hiroru · Post by **hiroru** » Mon Jan 03, 2011 7:20 am

moment, how you finally resolved this?

Thanks

cach0rr0 · Post by **cach0rr0** » Tue Jan 04, 2011 5:55 am

curiosity, does it do the same with madwifi-ng?

after running airmon-ng start <ifname> check /proc/net/dev and see if some mysterious other interface is created.
I use ath9k but am still on .34 (kernel), it doesnt do any such thing, but i know my .35 build does with iwlagn.

If you see some new mysterious interface created, see if airodump-ng -c <channel> -w <blah> <strangeifname> actually stays fixed on a channel, as well do your aireplay on this interface and not the original (wlan0).

Other than that, no idea.

jms.gentoo · Post by **jms.gentoo** » Sun Jan 23, 2011 7:06 pm

airodump-ng: channel handling is broken.
have a look here
http://trac.aircrack-ng.org/ticket/742

a patch:
http://trac.aircrack-ng.org/attachment/ ... rror.patch

jms.gentoo · Post by **jms.gentoo** » Sun Jan 23, 2011 8:32 pm

change in kernel after 34 (I think) affect aircrack-ng
so downgrade to older kernel.(alternativly you can pach the kernel)
otherwise there is an ebuild
http://gpo.zugaina.org/net-wireless/aircrack-ng

there is a pached ebuild in pentoo overlay