[Aironet] Change of mtu size > than 1500 Byte

[Jean-Pierre E. <eb...@ee...>]

Hi, 

i added a new routine to the aironet driver, which allow to set the
maximum transfer unit (MTU)
to a value greater than 1500 Byte by the standard unix ifconfig command:

e.g. ifconfig eth[x] mtu 2312

This is in particular interesting for those people how work in adhoc
mode. By allowing larger packets you
improve the performance of the network (a test measurement showed up to
7 MBit/s for directional 
UDP traffic and packet sizes of 2312 Byte). Keep in mind, that when
using aironet in infrastructure 
mode with a ethernet backbone it is not a good idea to allow for large
packets, since ethernet packet 
are at max. 1500 Byte.

BTW, 2312 Byte is the specified maximum payload length of a data frame
for IEEE802.11.

Ben, would be nice if you would incorporate that in the "official"
distribution of the aironet driver.
Let me know, what you think about that. I made the changes in the
0.98sa-version (attached).

Bye
JP