Date: Sat, 05 Mar 2005 01:47:05 +0800 From: gnn@freebsd.org To: Aziz KEZZOU <opensource.enthousiat@gmail.com> Cc: hackers@freebsd.org Subject: Re: generic network protocols parser ? Message-ID: <m2psyf2tie.wl%gnn@neville-neil.com> In-Reply-To: <37e13166050304080715525d7e@mail.gmail.com> References: <37e13166050304080715525d7e@mail.gmail.com>
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At Fri, 4 Mar 2005 11:07:34 -0500, 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 ? > > 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 ? > You might want to look at libnet and libnet-ng. Start here: http://www.packetfactory.net/libnet/ Perhaps not exactly what you want but the beginnings are there. Later, George
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