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acx [2007/05/20 13:42]
hirte created
acx [2017/01/09 21:26]
mister_x Mark page as deprecated.
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 +====== DEPRECATED ======
 +
 +**IMPORTANT NOTE**: This page is deprecated, updated documentation can be found [[install_drivers|here]]
 +
 ====== ACX100/​ACX111 ​ ====== ====== ACX100/​ACX111 ​ ======
  
-You need to use a kernel version >= 2.6.10:+//Note: This page is about the older acx100/​acx111 drivers. For the new mac80211-based driver, see [[acx1xx]].//​ 
 + 
 +===== WARNING!!! ===== 
 +**There is legal controversy surrounding the development of this driver, see the wireless [[http://​kerneltrap.org/​comment/​reply/​6692|mailing list]] for more information. See [[http://​acx100.sourceforge.net/​wiki/​History#​Kernel_inclusion|kernel inclusion section]] for some background information on the previous attempt to include it in the mainline kernel.  
 +** 
 + 
 +===== Driver Status ​ ===== 
 + 
 +This is a short report about acx driver. See [[http://​forum.aircrack-ng.org/​index.php?​topic=2216.msg12412#​msg12412|this thread]] for details. 
 + 
 +There are 3 version of the driver: 
 +- plain 
 +- SoftMac 
 +- mac80211 
 + 
 +The current stable release of the "​plain"​ driver is v0.3.36 (acx-20070101) and it works t works on kernels equal or greater than 2.6.10. 
 + 
 +For kernel 2.6.21-22, a patch is needed: http://​acx100.sourceforge.net/​wiki/​Patch_2.6.22 
 +The driver does not support WPA. 
 + 
 +The driver can be patched for injection with the instructions below on this page. 
 + 
 +The SoftMac version uses deprecated stack layer, it's not updated anymore. 
 + 
 +The [[acx1xx|mac80211 version]] is still in beta. It requires a kernel equal or greater than 2.6.18 (with mac80211 support). Starting with 2.6.27, it will be integrated in the kernel. 
 + 
 +From kernel 2.6.23 forward, an injection patch is already integrated in the mac80211 stack in the kernel mainline. For fragmentation attack support, an additional patch is required. See the [[mac80211]] page for more details. 
 + 
 +All versions require a non-GPL firmware in /​lib/​firmware/,​ you can find it online. 
 + 
 +Read more at: http://​acx100.sourceforge.net/​wiki/​Main_Page 
 + 
 + 
 +===== Driver Installation ​ ===== 
 + 
 +You need to use a kernel version>​= 2.6.10:
  
   ifconfig wlan0 down   ifconfig wlan0 down
Line 13: Line 52:
   make -C /​lib/​modules/​`uname -r`/build/ M=`pwd` modules_install   make -C /​lib/​modules/​`uname -r`/build/ M=`pwd` modules_install
   modprobe acx   modprobe acx
 +
 +note: if the code doesn'​t work, Ubuntu users will want to change the following lines:
 +  make -C /​lib/​modules/​`uname -r`/build/ M=`pwd` modules
 +  make -C /​lib/​modules/​`uname -r`/build/ M=`pwd` modules_install
 +and replace `uname -r` by the name of their current kernel, followed by generic.
 +The reason for this is that the actual modules directory for the current kernel (which is what the /​lib/​modules/​`uname -r`/ commande will return) does not contain the build symbolic link, and therefore no makefile will be found for the make command.
 +Only the /​lib/​modules/​2.6.20-16-generic/​ contains a simlink called "​build"​ that will ensure the proper makefile is found.
 +
 +ie: as of 26th of June 2007, under Ubuntu 7.04 "​Feisty Fawn", the correct lines would be:
 +  make -C /​lib/​modules/​2.6.20-16-generic/​build/​ M=`pwd` modules
 +  make -C /​lib/​modules/​2.6.20-16-generic/​build/​ M=`pwd` modules_install
 +
 +
 +====== Troubleshooting Tips  ======
 +
 +===== FAILED to free any of the many full tx buffers =====
 +
 +You get kernel messagess similar to:
 +Jul  3 00:44:12 ubuntop kernel: [  736.008000] wlan0: FAILED to free any of the many full tx buffers. Switching to emergency freeing. Please report!
 +Jul  3 00:44:12 ubuntop kernel: [  736.008000] wlan0: tx timeout!
 +
 +From the author of the driver patch:
 +
 +That's a problem with the driver. I saw it several times while writing the acx111 patch. It works like this:
 +
 +Every packet you transmit allocates a tx buffer, so it will start filling up the whole buffer space until its freed again and that's the point. It just doesn'​t get freed in time.
 +Once you reached the limit and have eaten up all available buffers, it won't work again until you reload the driver. Its waiting for a TX_COMPLETE message...
 +
 +Possible workarounds (don't know for sure right now, just try it):
 +
 +    * This happens when you use the unpatched driver, double and trible check that you're infact using a patched driver: look at the buildtime, remove all acx modules, make sure your custom module is in the correct /​lib/​modules/​`uname -r`/ path...
 +    * Use aireplay-ng 0.8 or higher, as they incorporate indirect support for acx injection (sending more ack frames)
 +    * Change your hardware mac to the fakemac used for "​-h"​
  
acx.txt · Last modified: 2017/01/09 21:26 by mister_x