Re: [B.A.T.M.A.N.] MAC addresses of loop detect frames in global translation-table

[Simon Wunderlich <sw@simonwunderlich.de>]

[-- Attachment #1: Type: text/plain, Size: 2668 bytes --]

Hi Andreas,

yes, those are loop detection packets. Preventing these entries from the local 
translation table has been implemented only recently. We can potentially do 
the same for global addresses as well, it just hasn't been done so far ... at 
least I don't see a reason prevening us from that. It is probably added by 
"speedy join" in the first place.

Thanks,
      Simon

On Wednesday, May 31, 2017 3:18:39 PM CEST Andreas Pape wrote:
> Hello,
> 
> I stumbled across some weired MAC addresses starting with ba:be in the
> global translation-table when running batman-adv-2017.0.1. I run my setup
> with bla enabled.
> 
> Most of the entries in the global tt of my devices consist of these mac
> addresses. Looking through the code they come from frames which seem to be
> used for loop detection. Adding such MAC addresses to the local tt is
> prevented with the help of the batadv_bla_is_loopdetect_mac function. I
> wonder why adding these macs to the global tt is not prevented in a
> simliar way. Would it be possible to add a corresponding check to
> batadv_tt_global_add to prevent these macs from being added to the global
> tt? Or is there a specific reason why these mac addresses must occur in
> the global tt and which I have not understood so far?
> 
> Best regards,
> Andreas
> 
> 
> 
> ..................................................................
> PHOENIX CONTACT ELECTRONICS GmbH
> 
> Sitz der Gesellschaft / registered office of the company: 31812 Bad Pyrmont
> USt-Id-Nr.: DE811742156
> Amtsgericht Hannover HRB 100528 / district court Hannover HRB 100528
> Geschäftsführer / Executive Board: Ulrich Leidecker, Christoph Leifer
> __________________________________________________________________
> Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte
> Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail
> irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und
> vernichten Sie diese Mail. Das unerlaubte Kopieren, jegliche anderweitige
> Verwendung sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet.
> ---------------------------------------------------------------------------
> ------------------------- This e-mail may contain confidential and/or
> privileged information. If you are not the intended recipient (or have
> received this e-mail in error) please notify the sender immediately and
> destroy this e-mail. Any unauthorized copying, disclosure, distribution or
> other use of the material or parts thereof is strictly forbidden.
> ___________________________________________________________________


[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 833 bytes --]