Aireplay: open(/dev/rtc): No such device

whoisvince · 03-31-2005

I'm having a problem with aireplay on one of my Gentoo boxes. I've compiled and used it successfully it on another computer before, but on this one I get this error

Code:

open(/dev/rtc): No such device

when I try to run it, even when I run it as root with no command line switches.

I am running:
- custom kernel, version 2.6.10-gentoo-r6 (from uname -r output)
- a Hawking Technologies H-WU 300 prism2 usb wireless card
- linux-wlan-ng-0.2.1-pre26 drivers patched from the aireplay-2.2 tarball

I've tried rebuilding the drivers and aireplay after a make clean using a normal user and root. I know the drivers work because kismet and airodump work fine, and the output dumps look normal in ethereal.

I believe /dev/rtc is the real time clock in linux, and it does exist in my /dev directory.

Does anyone know why I'm getting this error?

wrzwaldo · 03-31-2005

Quote:

Originally Posted by whoisvince

I'm having a problem with aireplay on one of my Gentoo boxes. I've compiled and used it successfully it on another computer before, but on this one I get this error

Code:

open(/dev/rtc): No such device

when I try to run it, even when I run it as root with no command line switches.

I am running:
- custom kernel, version 2.6.10-gentoo-r6 (from uname -r output)
- a Hawking Technologies H-WU 300 prism2 usb wireless card
- linux-wlan-ng-0.2.1-pre26 drivers patched from the aireplay-2.2 tarball

I've tried rebuilding the drivers and aireplay after a make clean using a normal user and root. I know the drivers work because kismet and airodump work fine, and the output dumps look normal in ethereal.

I believe /dev/rtc is the real time clock in linux, and it does exist in my /dev directory.

Does anyone know why I'm getting this error?

See dark bold text.

And google says...

http://lists.us.dell.com/pipermail/l...er/035407.html "/dev/rtc"

I know it's probably not the same computer but you get the picture.

whoisvince · 04-01-2005

Ugh. If I get any dumber, I'm going to need to wear a helmet...

I had actually found some info like that right after I posted. I went through my kernel config and *thought* I had checked enhanced RTC support, but apparently I didn't save it correctly before I recompiled. I went back after getting your link, wrzwaldo, to compile it as a module, and lo and behold, it wasn't compiled into the kernel at all. I assumed it was a compiling problem, not a kernel module problem because I've never had an RTC problem before.

I enabled RTC support and aireplay works like a charm. I apologize for the superfluous post.

Dutch · 04-01-2005

Quote:

Originally Posted by whoisvince

Ugh. If I get any dumber, I'm going to need to wear a helmet...

Drop the helmet. Do a search for the Pcap. Weighs less, dumbness impression factor is high when worn, and is available for purchase over the internet.

Dutch

Kronk · 04-01-2005

Or you could just comment out the offending /dev/rtc checks in the aireplay.c file as I did. Aircrack seems to work fine on my DELL hardware running RedHat ES. Your times will be off, but I am not really interested in setting any speed records, I just want to test AP security.

This is also required if you are using RISC based hardware, like an Apple Powerbook, as enhanced RTC is not a kernel option.

03-31-2005	#1 (permalink)
whoisvince Registered Member Join Date: Mar 2005 Posts: 21	Aireplay: open(/dev/rtc): No such device I'm having a problem with aireplay on one of my Gentoo boxes. I've compiled and used it successfully it on another computer before, but on this one I get this error Code: open(/dev/rtc): No such device when I try to run it, even when I run it as root with no command line switches. I am running: - custom kernel, version 2.6.10-gentoo-r6 (from uname -r output) - a Hawking Technologies H-WU 300 prism2 usb wireless card - linux-wlan-ng-0.2.1-pre26 drivers patched from the aireplay-2.2 tarball I've tried rebuilding the drivers and aireplay after a make clean using a normal user and root. I know the drivers work because kismet and airodump work fine, and the output dumps look normal in ethereal. I believe /dev/rtc is the real time clock in linux, and it does exist in my /dev directory. Does anyone know why I'm getting this error?

04-01-2005	#3 (permalink)
whoisvince Registered Member Join Date: Mar 2005 Posts: 21	Problem resolved. Ugh. If I get any dumber, I'm going to need to wear a helmet... I had actually found some info like that right after I posted. I went through my kernel config and thought I had checked enhanced RTC support, but apparently I didn't save it correctly before I recompiled. I went back after getting your link, wrzwaldo, to compile it as a module, and lo and behold, it wasn't compiled into the kernel at all. I assumed it was a compiling problem, not a kernel module problem because I've never had an RTC problem before. I enabled RTC support and aireplay works like a charm. I apologize for the superfluous post.

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04-01-2005	#5 (permalink)
Kronk Registered Member Join Date: Jul 2004 Posts: 13	Or you could just comment out the offending /dev/rtc checks in the aireplay.c file as I did. Aircrack seems to work fine on my DELL hardware running RedHat ES. Your times will be off, but I am not really interested in setting any speed records, I just want to test AP security. This is also required if you are using RISC based hardware, like an Apple Powerbook, as enhanced RTC is not a kernel option.