netdev - Re: Using Wireless Extensions in a Kernel Module

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Date:	Fri, 10 Jul 2009 09:39:24 -0700
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Tim Schneider <schneid5@...uni-bonn.de>
Cc:	netdev <netdev@...r.kernel.org>,
	Johannes Berg <johannes@...solutions.net>
Subject: Re: Using Wireless Extensions in a Kernel Module

Hi Tim,

> I am trying to write a Kernel Module with an implementation of a new  
> TCP-Algorithm. Since I need to know the RSSI-Value (Received Signal  
> Strength indication) of the sent package, I extended the Pluggable  
> Congestion Control Mechanism by a new function which is called right  
> after the package is send. At that point, I need to read the RSSI-Value.
> 
> I'm now trying to somehow access that value, but I can't figure out  
> how. I've come as far, that I found out about the Wirelless  
> Extensions, which seem to be very promising. In the header file the  
> author states, that this mechanism can be used by both user-space apps  
> and kernel modules. Unfortunately nobody seems to ever have used it in  
> kernel space, since I can't find any documentations about it.
> 
> I would be very glad, if somebody could give me link to a page  
> containing informations about this topic, or even just a hint that  
> could help me.

we are in the process of killing Wireless Extensions (WEXT) and
replacing it with a netlink based cfg80211/nl80211 interface. The better
mailing list is linux-wireless@...r.kernel.org for such questions.

Regards

Marcel


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