Linux Ethernet Bridging - Oct 2008 - [Bridge] RSTP location and GPL info

I am currently working on a project for work where I need to implement RSTP
on non-Linux platforms (possibly ThreadX). I saw that there was a form by
Mr. Srinivas Aji that implemented RSTP on Linux Bridge. Can someone please
tell me if that fork is somewhere on the kernel.org git repository?

I would like to use this work (without changing any code). I don't
understand the intricacies of GPL.

* Can someone please point me to resources that say what I can and cannot
use in my project?
* I cannot open source my project but I am willing to contribute back any
changes I make to portions of linux bridge. I don't mind testing it on linux
before submitting changes. Is this alright?
* Also, I just need to use portions of the project. For example, I only care
about the state machines and not the interaction with the Linux OS. Can I
just use bits and pieces of the linux bridge project?

Thanks,
MT
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On Wed, 1 Oct 2008 10:57:42 -0400
"M T" <m.t.linuxbridge at gmail.com> wrote:
> I am currently working on a project for work where I need to implement RSTP
> on non-Linux platforms (possibly ThreadX). I saw that there was a form by
> Mr. Srinivas Aji that implemented RSTP on Linux Bridge. Can someone please
> tell me if that fork is somewhere on the kernel.org git repository?
> 
> I would like to use this work (without changing any code). I don't
> understand the intricacies of GPL.
> 
> * Can someone please point me to resources that say what I can and cannot
> use in my project?
> * I cannot open source my project but I am willing to contribute back any
> changes I make to portions of linux bridge. I don't mind testing it on
linux
> before submitting changes. Is this alright?
> * Also, I just need to use portions of the project. For example, I only
care
> about the state machines and not the interaction with the Linux OS. Can I
> just use bits and pieces of the linux bridge project?
> 
> Thanks,
> MT
Did you look at
git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/rstp.git

It is GPL v2.