Need help to write a new driver for a new wireless device (not yet in the market).

[Sriharsha Vedurmudi]

Hi Christian and Others,
 I am facing an issue while trying to add a WPA/RSN IE to an event. I
tried to follow the airo card (driver in airo.c) for this, but in that
firmware, the entire IE is being sent raw to iwe_stream_add_point()
function. But in our case, the IE is parsed and filled in our private
data structure. Is there any way in WE ver 21 where I can pass the WPA
IE into some structure and then send the event to wpa_supplicant?

Regards,
Harsha.

On 9/28/07, Christian Buennig <masala at web.de> wrote:
> Hi,
>
> some notes concerning wireless events ..
>
> Sriharsha Vedurmudi wrote:
> > Friends,
> >  I am a novice in Wireless drivers (did some Ethernet based drivers
> > though). I have a new 802.11b/g chip (not publically available yet)
> > with its internal documentation and need help from the community to
> > write a driver for it in Linux.
> >  I am using an Linux port (kernel 2.6.19-2) on an ARM based SoC (with
> > WE version 21). To begin with I have implemented the basics and my
> > system now associates with open mode AP and WEP based AP. Now, I want
> > to test out its WPA-PSK functionality. Are the following ioctls
> > sufficient or do I need to implement more (apart from the basic ones)?
> > SIOCSIWMODE,
> > SIOCSIWGENIE,
> > SIOCSIWAUTH,
> > SIOCSIWESSID
> >
> > Also, how do I use Wireless_Events (I am not able to find any proper
> > documentation for the same).
>
> What exactly do you mean by "use"? Listening for them in a user space
> application or raising them within the driver?
>
> Events are implemented with netlink sockets to transfer them from the
> driver to user space.
>
> Example code for listening can be found in the source code of the
> wireless tools:
> http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html#latest
> and there in the file iwevent.c
>
> Example code for raising an event can be found, for instance, in the
> Madwifi code:
> http://madwifi.org/browser/trunk/net80211/ieee80211_input.c and there in
> the function iwspy_event(), near line 145
>
> However, I am not that up to date about wireless driver development but
> doesn't the generic Linux 80211 stack implement all the event things?
>
> > Apart from this, is there some documentation (like 'Linux Device
> > Drivers') that specifically tutors someone at writing a driver for a
> > wireless station?
> >
> > Yours sincerely,
> > VSH.
>
>