Re: [GNUnet-developers] Kernel Patch for raising plan transport plugin speed

[David Brodski]

Hi Christian and Florian,

I did not try to patch the kernel since it would not have solve a lot of other issues.
I
 think that they had driver problems and nobody needed faster speeds for
 penetration testing, but I can not find my source anymore. One problem 
was at least that the radiotap format had only one byte for the speed 
and the unit was 500Kbps so max speed would have been 128Mbits (see 
http://www.radiotap.org/defined-fields/Rate).
I saw that they added new fields since I last looked at it but it does not seem to change anything.
Anyways
 patching the kernel would not have solved that the program then needed a
 method to calculate the best data rate, basically reimplement big parts
 of the AP infrastructure of the kernel.
A better solution then 
probably would have been to create a new operating mode as a kernel 
module, so that all the information from the hardware (signal strength, 
...) could be attained. This would have to be implemented for all the 
wlan driver and would have used a lot of time. So not a good solution 
either.

A week ago I tried out Wifi direct on an linux openWrt 
platform (carambola2). That could be a better solution, we probably have
 to reimplement some parts of wpa_supplicant to get rid of the wpa 
autentication (or use a generic gnunet network name and password or auto
 accept incoming wpa-push requests. That would have the benefit of bing 
compatible with the standard). Benifit would be that wifi-direct already
 supports being in an AP network at the same time and is supported in a 
lot of wlan drivers (my samsung galaxy s3 works can do it without patch 
in the wps-push method). It is not perfect but faster :-)

Regards,
David

P.s. the first mail was probably not send to the list ;-)

Am 04.02.2015 17:41:24, schrieb Christian Grothoff:

Hi!

Not as far as I know. I do recall some discussion about the patch not
being the issue but the Linux kernel developers not wanting such a
change. David might recall more details, it's been a while ;-).

-Christian

On 02/04/2015 02:11 PM, Florian Felgenhauer wrote:

Hi *,

in the GNUnet documentation on page https://gnunet.org/configuring-wlan-transport-plugin
there is some limitation mentioned for the wlan transport plugin:

"Wlan speed is at the maximum of 1 Mbit/s because support for choosing the wlan speed with packet injection was removed in newer kernels“

Did anybody tried to patch the kernel to get rid off this limitation?

Cheers

Florian



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