ASN.1 parsing for H.323

ASN.1 parsing for H.323

[Philip Craig]

Hi,

I've seen a few messages in the list archives about the current
H.323 being a brute force approach, and that a better implementation
would be to do ASN.1 parsing.

Is ASN.1 parsing in the kernel still the desired approach?  I saw
some messages from Sampsa Ranta in 2001 where he concluded that it
was not suited for in the kernel and that it would be better in
user space.  I think his primary reason was the need to parse the
stream, rather than individual packets.

Has anyone else done any work on this yet?

If this is a worthwhile endeavour I may start some work on it.

-- 
Philip Craig - philipc@snapgear.com - http://www.SnapGear.com
SnapGear - Custom Embedded Solutions and Security Appliances

Re: ASN.1 parsing for H.323

[Jozsef Kadlecsik]

On Mon, 16 Jun 2003, Philip Craig wrote:

> I've seen a few messages in the list archives about the current
> H.323 being a brute force approach, and that a better implementation
> would be to do ASN.1 parsing.

Yes.

> Is ASN.1 parsing in the kernel still the desired approach?  I saw
> some messages from Sampsa Ranta in 2001 where he concluded that it
> was not suited for in the kernel and that it would be better in
> user space.  I think his primary reason was the need to parse the
> stream, rather than individual packets.

In my opinion because for H.323 there'd be need a minimal ASN.1 PER
decoder "only", it'd worth to do it in-kernel.

> Has anyone else done any work on this yet?

No time :-(.

> If this is a worthwhile endeavour I may start some work on it.

I'd definitely be good if someone had time to work on such a project.

Best regards,
Jozsef
-
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