[B.A.T.M.A.N.] Manually Updating Translation table

[B.A.T.M.A.N.] Manually Updating Translation table

[Kartikeswar K]

Dear BATMAN Community members,

I am new to BATMAN Mesh network and looking forward for answer to my
query related to updating Local Translation Table in a BATMAN Node.

I would like to make a mesh network where I would like to update the
client entry in Local Translation manually. Is it possible to add the
entry manually in translation table?
If so, I would like to know how can I update this table in BATMAN from
user space?

Thanks in advance and would appreciate your responses.

Thanks & Regards,
Kartikeswar Koppula
kartikeswar@gmail.com

Re: [B.A.T.M.A.N.] Manually Updating Translation table

[Linus Lüssing]

Hi,

Currently, no there isn't. The only thing you could do to manually
add an entry from inside a node is by crafting a dummy packet with
the desired ethernet source address and transmit it on bat0. That
way batman-adv would add that MAC address. Deleting only happens
after a timeout though, no way to force it manually.

In case you are thinking about implementing such a feature:
The Linux bridge has a feature like that to update the FDB
(forwarding database, for unicast addresses) or MDB (multicast
database). It uses netlink for that and you can use
/usr/sbin/bridge to easily add and remove entries from userspace.
That'd probably be the approach to mimic in batman-adv for such a
feature.

Regards, Linus

PS: Out of curiousity, could you share what you'd need such a
feature for?


On Wed, Aug 16, 2017 at 03:57:29PM +0200, Kartikeswar K wrote:
> Dear BATMAN Community members,
> 
> I am new to BATMAN Mesh network and looking forward for answer to my
> query related to updating Local Translation Table in a BATMAN Node.
> 
> I would like to make a mesh network where I would like to update the
> client entry in Local Translation manually. Is it possible to add the
> entry manually in translation table?
> If so, I would like to know how can I update this table in BATMAN from
> user space?
> 
> Thanks in advance and would appreciate your responses.
> 
> Thanks & Regards,
> Kartikeswar Koppula
> kartikeswar@gmail.com

Re: [B.A.T.M.A.N.] Manually Updating Translation table

[Kartikeswar Koppula]

HI Linus,

Thanks a lot for the reply. I will try to do what you have described.

I am trying to use BATMAN for mesh networking of mobile Networks,
where the Mobile Gateway would be the BATMAN Node and UE (Client) is
not a batman node.
So I want to add UE's entry in Mobile Gateway's local translation
table manually which will be broadcast-ed in OGM to other Mobile
Gateway BATMAN nodes thereby UE's (clients) connected to other
Gateway's will be able to reach UE's connected to first mobile
gateway.

Best Regards,
Kartik

On Wed, Aug 16, 2017 at 4:47 PM, Linus Lüssing <linus.luessing@c0d3.blue> wrote:
> Hi,
>
> Currently, no there isn't. The only thing you could do to manually
> add an entry from inside a node is by crafting a dummy packet with
> the desired ethernet source address and transmit it on bat0. That
> way batman-adv would add that MAC address. Deleting only happens
> after a timeout though, no way to force it manually.
>
> In case you are thinking about implementing such a feature:
> The Linux bridge has a feature like that to update the FDB
> (forwarding database, for unicast addresses) or MDB (multicast
> database). It uses netlink for that and you can use
> /usr/sbin/bridge to easily add and remove entries from userspace.
> That'd probably be the approach to mimic in batman-adv for such a
> feature.
>
> Regards, Linus
>
> PS: Out of curiousity, could you share what you'd need such a
> feature for?
>
>
> On Wed, Aug 16, 2017 at 03:57:29PM +0200, Kartikeswar K wrote:
>> Dear BATMAN Community members,
>>
>> I am new to BATMAN Mesh network and looking forward for answer to my
>> query related to updating Local Translation Table in a BATMAN Node.
>>
>> I would like to make a mesh network where I would like to update the
>> client entry in Local Translation manually. Is it possible to add the
>> entry manually in translation table?
>> If so, I would like to know how can I update this table in BATMAN from
>> user space?
>>
>> Thanks in advance and would appreciate your responses.
>>
>> Thanks & Regards,
>> Kartikeswar Koppula
>> kartikeswar@gmail.com

Re: [B.A.T.M.A.N.] Manually Updating Translation table

[Linus Lüssing]

Hi Kartik,

Have you considered using a Linux bridge? That's usually the most
common and easiest approach to get external clients into a
batman-adv mesh network. batman-adv will learn MAC addresses
from passed through traffic automatically.

Regards, Linus


On Wed, Aug 16, 2017 at 05:05:27PM +0200, Kartikeswar Koppula via B.A.T.M.A.N wrote:
> Date: Wed, 16 Aug 2017 17:05:27 +0200
> From: Kartikeswar Koppula <kartik@corenetdynamics.com>
> To: The list for a Better Approach To Mobile Ad-hoc Networking
>  <b.a.t.m.a.n@lists.open-mesh.org>
> Subject: Re: [B.A.T.M.A.N.] Manually Updating Translation table
> 
> HI Linus,
> 
> Thanks a lot for the reply. I will try to do what you have described.
> 
> I am trying to use BATMAN for mesh networking of mobile Networks,
> where the Mobile Gateway would be the BATMAN Node and UE (Client) is
> not a batman node.
> So I want to add UE's entry in Mobile Gateway's local translation
> table manually which will be broadcast-ed in OGM to other Mobile
> Gateway BATMAN nodes thereby UE's (clients) connected to other
> Gateway's will be able to reach UE's connected to first mobile
> gateway.
> 
> Best Regards,
> Kartik
> 
> On Wed, Aug 16, 2017 at 4:47 PM, Linus Lüssing <linus.luessing@c0d3.blue> wrote:
> > Hi,
> >
> > Currently, no there isn't. The only thing you could do to manually
> > add an entry from inside a node is by crafting a dummy packet with
> > the desired ethernet source address and transmit it on bat0. That
> > way batman-adv would add that MAC address. Deleting only happens
> > after a timeout though, no way to force it manually.
> >
> > In case you are thinking about implementing such a feature:
> > The Linux bridge has a feature like that to update the FDB
> > (forwarding database, for unicast addresses) or MDB (multicast
> > database). It uses netlink for that and you can use
> > /usr/sbin/bridge to easily add and remove entries from userspace.
> > That'd probably be the approach to mimic in batman-adv for such a
> > feature.
> >
> > Regards, Linus
> >
> > PS: Out of curiousity, could you share what you'd need such a
> > feature for?
> >
> >
> > On Wed, Aug 16, 2017 at 03:57:29PM +0200, Kartikeswar K wrote:
> >> Dear BATMAN Community members,
> >>
> >> I am new to BATMAN Mesh network and looking forward for answer to my
> >> query related to updating Local Translation Table in a BATMAN Node.
> >>
> >> I would like to make a mesh network where I would like to update the
> >> client entry in Local Translation manually. Is it possible to add the
> >> entry manually in translation table?
> >> If so, I would like to know how can I update this table in BATMAN from
> >> user space?
> >>
> >> Thanks in advance and would appreciate your responses.
> >>
> >> Thanks & Regards,
> >> Kartikeswar Koppula
> >> kartikeswar@gmail.com

Re: [B.A.T.M.A.N.] Manually Updating Translation table

[Linus Lüssing]

Hi Kartik,

On Wed, Oct 25, 2017 at 02:46:32PM +0200, Kartikeswar Koppula wrote:
> I checked the routes manually and it looks okay.

Could you share those? Next to "ip route show" the following tables
would be interesting, too:

$ ip address show
$ brctl show
$ batctl tg
$ batctl o
$ batctl n

Regards, Linus