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Date: Sat, 19 Aug 2006 17:51:33 +0400
From: Ruslan Ermilov <ru@freebsd.org>
To: Rajkumar S <rajkumars@gmail.com>
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Cc: freebsd-net@freebsd.org
Subject: Re: ng_ip_input ?
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On Sat, Aug 19, 2006 at 07:05:49PM +0530, Rajkumar S wrote:
> On 8/19/06, Ruslan Ermilov <ru@freebsd.org> wrote:
> >On Sat, Aug 19, 2006 at 05:44:39PM +0530, Rajkumar S wrote:
> >> The man page states
> >>
> >> DESCRIPTION
> >>     The ip_input node type takes all received packets and queues them=
=20
> >into
> >>     the IP in input processing subsystem.
>=20
> >It does this simple thing:
> >
> >> netisr_dispatch(NETISR_IP, m);
> >
> >which means putting the mbuf pointed to by "m" into the IP
> >input queue and scheduling a call to ip_input().
>=20
> Thanks a lot for  your answer.
>=20
> So this is used to inject packets into the ip stack?
>
Yes.

> also, normally
> packets received from ethernet is passed into the same point, right?
>=20
Normally, yes.  By sys/net/if_ethersubr.c::ether_demux().

> Any points to docs to read about a packet's traversal in FreeBSD ip
> stack? (especially wrt pf)
>=20
What level of detalization do you need?  Filters, such as pf(4), are
embedded into the normal processing using the pfil(9) API.


Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer

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