netdev - Re: Using skb->mark outside netfilter

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Message-ID: <518901DC.2050100@mojatatu.com>
Date:	Tue, 07 May 2013 09:30:04 -0400
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	Antonio Quartulli <antonio@...n-mesh.com>
CC:	"David S. Miller" <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: Using skb->mark outside netfilter

On 13-05-07 09:23 AM, Antonio Quartulli wrote:

> The mark is not really encoded in the batman header.
>
> Each node is configured with a mark value (the values have to be the same on
> everynode in order to make the mechanism work correctly), then batman-adv will
> advertise to the rest of the mesh which host is sending marked packets.
>
[..]
> Receiving nodes will then restore the mark in the skb each time it is coming from
> one of those advertised hosts.
>

I see - so some control "protocol" will be used to advertise the mark
and which host will use such a mark? Or are you saying some admin is
going around and configuring 100 batman nodes? ;->

Note: I have no freaking clue in regards to batman or its usage.

> A future feature may consists in carrying the mark directly into the header so
> that batman-adv itself does not have to take care about the meaning of such
> value but will just carry it (we still have to think about it...it is just an
> idea now)
>

I think that may be more interesting because it may allow you to use
many different marks with many different meanings. It doesnt disqualify
a control protocol advertising the mark.

cheers,
jamal



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