From owner-freebsd-hackers@FreeBSD.ORG  Fri Mar  4 19:41:34 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id BDA9E16A4CE; Fri,  4 Mar 2005 19:41:34 +0000 (GMT)
Received: from mail.vicor-nb.com (bigwoop.vicor-nb.com [208.206.78.2])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 9B26943D2D; Fri,  4 Mar 2005 19:41:34 +0000 (GMT)
	(envelope-from julian@elischer.org)
Received: from [208.206.78.97] (julian.vicor-nb.com [208.206.78.97])
	by mail.vicor-nb.com (Postfix) with ESMTP
	id 3A5E37A41E; Fri,  4 Mar 2005 11:41:34 -0800 (PST)
Message-ID: <4228B9ED.9040906@elischer.org>
Date: Fri, 04 Mar 2005 11:41:33 -0800
From: Julian Elischer <julian@elischer.org>
User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.5) Gecko/20050218
X-Accept-Language: en, hu
MIME-Version: 1.0
To: Aziz KEZZOU <opensource.enthousiat@gmail.com>
References: <37e13166050304080715525d7e@mail.gmail.com>
In-Reply-To: <37e13166050304080715525d7e@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
cc: freebsd-net@freebsd.org
cc: hackers@freebsd.org
Subject: Re: generic network protocols parser ?
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 04 Mar 2005 19:41:34 -0000



Aziz KEZZOU wrote:

>Hi all,
>I am wondering if any one knows  about a generic parser which takes a
>packet (mbuf) of a certain protocol (e.g RSVP ) as input and generates
>some data structre representing the packet ?
>  
>

you might look at DPF
 (a packet filter/classifier)..
it has an interesting filter description language.

>I've been searching for a while and found that ethereal and tcpdump
>for example use specific data structres and functions to dissect each
>protocol packets. Is this the only approach possible ?
>
>My supervisor suggested using a TLV (Type/Length/Value) approach
>instead. Any opinions about that?
>
>If no such a parser exists is there any practical reason why ?
>
>Thanks,
>Aziz
>_______________________________________________
>freebsd-net@freebsd.org mailing list
>http://lists.freebsd.org/mailman/listinfo/freebsd-net
>To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
>  
>