Re: [mpls-linux-general] Re: packet journey in mpls linux (for experts)

[James R. L. <jl...@mi...>]

On Sat, Mar 29, 2003 at 12:15:44PM +0000, Francesco Oppedisano wrote:
> >Are you asking if there are netfilter hooks in MPLS?  Not, not yet.
> 
> i'm not a kernel hacker but it seems not to be an hard task to put  a 
> netfilter hook in mpls....isn't it?

Shouldn't be.  In fact there is someone working on it.  I do not know
the status of their work.

> > As far as I know there are only netfilter hook in the IPv4 and IPv6 code.
> > Remember there are two differnt path a packet can take to get into the
> > MPLS code:
> > -packet arrives at ethernet driver with protocol ID of 0x8847
> >  (LSR or egress LER)
> > -packet get diverted from IPv4 into MPLS (ingress LER)
>  
> Yes i know this...
> 
> >May I ask what you are trying to do?  Maybe I can help point you in the
>  right direction.
> 
> I'm working on a Diffserv over MPLS trial and i have to implement a system 
> which takes some measures on aggregate flows and decides if more provisioning 
> is needed (really i'm not sure how to do everything, but now this is not the 
> problem...the problem in WHERE); so my idea was to make a netfilter hook but 
> now i have to take another way...but the problem is: to intercept a packet at 
> any place of the path i have to put a call to my code in that place (i.e. i 
> have to hack mpls code) or i can make a module and tell the kernel  (in some 
> way) where to plug it in the path (without hacking mpls code)?
> At the moment i'm only analysing the code to decide how and where to plug my 
> system in the kernel code, after this i can think what it had to do ;-).

Do you want to measure the flows at the LER or the LSR?

> PS: Thank you Ramon for the interesting pointers :-)))
> PPS: anyone knows why i'm not receiving ML replies in my e-mail....i read the 
> replies on the web :-((

I've been getting some "undeliverables" from the mailing list admin account
I'll look to see if you account is one of them.

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-- 
James R. Leu