[Click] 802.11 tunning

[David Fuste]

Hi all,
Currently, I am doing research in the area of wireless ad-hoc networks 
and more exactly, in some improvements to achieve better operation and 
functioning of these networks.
One of my needs is to be able to "tune" the values of DIFS, SIFS, NAV... 
parameters of the 802.11 standard. In Click Modular Router, I've found 
these parameters in "clicknet/wifi.h".
So, I just want to know if these parameters (constants in wifi.h) are 
beared in mind by the kernel (or wireless iface) when click starts to 
run, or simply are values never used by the kernel of linux (so, they 
are only nomenclature in wifi.h).
I mean, if I change the value of the SIFS for example, will it cause 
changes in the time that the wireless interface wait for sending ACKs or 
not? So, does Click can really change the value of the Short Inter Frame 
Space of the wireless interface?

Thanks a lot!