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I have read pages and pages of wiki and I'm just more confused than ever as to driver and patches to use with the aircrack-ng suite. The card chipset is ath5k but the info is conflicting as to which is the best to use.

cat /proc/version
Linux version 3.5.0-22-generic (buildd@lamiak) (gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1) ) #33-Ubuntu SMP Wed Jan 2 21:45:40 UTC 2013

lsmod | grep ath5k
ath5k                 135206  0 
ath                    19188  1 ath5k
mac80211              461203  1 ath5k
cfg80211              175574  3 ath5k,ath,mac80211

lsmod | grep mac80211
mac80211              461203  1 ath5k
cfg80211              175574  3 ath5k,ath,mac80211

so do I use ath5k or mac80211 and then do I have to blacklist all the others? or am I good to go as I followed the instructions to get to this point but it just seems really confusing and conflicting.

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Welcome to Ask Ubuntu! mac80211, cfg80211 and ath with ath5k are just modules to work together to provide support for your device. If you would blacklist any of these, it won't work, as your lsmod output clearly shows the dependencies of them. Now what is your question exactly? Your title is about getting aircrack-ng to work, the body contains just questions about the kernel modules and how they work together. If it's about aircrack-ng, please provide more information about your attempts, what failed and what errors you got. –  gertvdijk Jan 21 '13 at 11:49
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1 Answer 1

I have had same question, but the answer is:

Ath5k is a new, completely FOSS driver for Atheros cards. Wireless-N-enabled Atheros chipsets should use ath9k instead. Unlike madwifi-ng, this driver is based on the new mac80211 stack, meaning that it requires aircrack-ng v1.0-rc1 or newer.

Aircrack-ng support

As of 2.6.27-rc2, ath5k can inject without patches (2.6.26 not tested, <=2.6.25 is known to be broken). However, injection support is a bit flaky, and speeds are limited to about 50~100pps. To improve injection speed, apply this patch. It is recommended that you also apply the mac80211 fragmentation patch for your kernel version, to enable the fragmentation attack. For the released 2.6.27 and 2.6.28 kernels, the mac80211 patch suffices, no extra patch is needed.

If you have a kernel older than 2.6.26, it's recommended that you install the latest compat-wireless-old package, and apply the 2.6.27 mac80211 fragmentation patch on the package itself. No ath5k-specific patch is needed for either flavor of compat-wireless.

Note that in the latest wireless-testing & linux-2.6 kernels, as well as in compat-wireless-2.6 (but not in compat-wireless-old), there is a bug that prevents the fragmentation attack from working properly when no managed interface is brought up on the same PHY as the monitor interface. As a workaround, bring up wlan0 after creating mon0 with airmon-ng.

Source: Aircrack-ng: ath5k - FOSS driver for Atheros A/B/G/Super-G cards

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