Linux Ethernet Bridging - Apr 2008 - [Bridge] Access the bridge through the userspace (Rx/Tx)

Hello everybody,

I'm trying to implement Layer 2 packet processing, where I need  to
transfer packets arriving at the Linux Bridge to a dedicated userspace
application. So my very basic question would be whether you could
recommend a strategy to achieve this.

Can I use TUN/TAP or do I need to implement specific code around a socket?

Thanks in advance,
Faruk

On Thu, Apr 24, 2008 at 1:30 AM, Faruk Keskin <faruk at eit.uni-kl.de>
wrote:
> Hello everybody,
>
>  I'm trying to implement Layer 2 packet processing, where I need  to
>  transfer packets arriving at the Linux Bridge to a dedicated userspace
>  application. So my very basic question would be whether you could
>  recommend a strategy to achieve this.
>
>  Can I use TUN/TAP or do I need to implement specific code around a socket?
>
>  Thanks in advance,
>  Faruk
>
Yes that would work fine.  I've seen userspace apps that handle frames
work well with the tap driver.  I've also seen vpn clients in
userspace that do the same and successfully forward traffic.

On Thu, 24 Apr 2008, Faruk Keskin wrote:
> I'm trying to implement Layer 2 packet processing, where I need  to
> transfer packets arriving at the Linux Bridge to a dedicated userspace
> application. So my very basic question would be whether you could
> recommend a strategy to achieve this.
>
> Can I use TUN/TAP or do I need to implement specific code around a socket?
You could alternatively use libpcap, if I understand your requirements 
properly.

-- 
Malcolm Scott
Research Assistant
University of Cambridge Computer Laboratory