[Bridge] Help Needed On Ethernet Bridge

[Stephen Hemminger]

On Thu, 28 May 2009 07:17:29 +0530
Thinkstor Inc <thinkstor at gmail.com> wrote:

>    Hi All,
>            My requirement is as below,
> 
> * I have to create a bridge on linux machine (kernel 2.6.23) and it has 2
> interfaces(eth0 & eth1)
> * I should have the control of Port State Changes
> (LISTENING,LEARNING,BLOCKING,FORWARDING,DISABLED) and
>    Only BLOCKING & FORWARDING States I Wud Be Using. I have to ensure that
> the port state never goes to any other states other than BLOCKING &
> FORWARDING.
> * Other thing is I have to send the control packets using the llc API's &
> NF_HOOK On both the interfaces and I recieve on LLC_SAP_BSPAN (Service
> Access Point Of STP)
> 
> The Messages I Send Wud be Control Packets Which Have To Pass Through Even
> If Port State Is BLOCKING...
> 
> I Have to form a ring like this
> 
>           NODE 1                NODE 2                NODE 3
>  -->eth1        eth0<----->eth1     eth0 <----->eth1      eth0<--
>  |--------------------------------------------------------------|
> 
> 
> What I have done So far is
>  * I have commented the STP port state change code So that Port wont
> traverse to any other state.
>  * I have IOCTL's to Send My Message And I Use LLC API's& NF_HOOK Which STP
> Uses to achieve sending.
>  * Recv Part I Do It On STP's stp_bpdu_rcv().
> 
> Everything Works Fine But Sometimes It Crashes...
> I'm not getting where exactly its breaking Can u please help me with this
> regard.

This looks a lot like the user level RSTP daemon. See:
 git://git.kernel.org/pub/scm/linux/kernel/git/shemminger/rstp.git

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