From owner-freebsd-net@FreeBSD.ORG  Wed Feb  8 13:32:00 2012
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id BE05F106564A;
	Wed,  8 Feb 2012 13:32:00 +0000 (UTC)
	(envelope-from glebius@FreeBSD.org)
Received: from cell.glebius.int.ru (glebius.int.ru [81.19.64.117])
	by mx1.freebsd.org (Postfix) with ESMTP id 4152A8FC13;
	Wed,  8 Feb 2012 13:32:00 +0000 (UTC)
Received: from cell.glebius.int.ru (localhost [127.0.0.1])
	by cell.glebius.int.ru (8.14.5/8.14.5) with ESMTP id q18DVw1K023042;
	Wed, 8 Feb 2012 17:31:58 +0400 (MSK)
	(envelope-from glebius@FreeBSD.org)
Received: (from glebius@localhost)
	by cell.glebius.int.ru (8.14.5/8.14.5/Submit) id q18DVwOL023041;
	Wed, 8 Feb 2012 17:31:58 +0400 (MSK)
	(envelope-from glebius@FreeBSD.org)
X-Authentication-Warning: cell.glebius.int.ru: glebius set sender to
	glebius@FreeBSD.org using -f
Date: Wed, 8 Feb 2012 17:31:58 +0400
From: Gleb Smirnoff <glebius@FreeBSD.org>
To: rozhuk.im@gmail.com
Message-ID: <20120208133158.GJ13554@FreeBSD.org>
References: <4f298d95.82b7cc0a.49b2.5d24@mx.google.com>
	<4F2A2C1F.1060609@freebsd.org>
	<4f2b0826.10cbcc0a.5660.ffff8aa9@mx.google.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=koi8-r
Content-Disposition: inline
In-Reply-To: <4f2b0826.10cbcc0a.5660.ffff8aa9@mx.google.com>
User-Agent: Mutt/1.5.21 (2010-09-15)
Cc: freebsd-net@FreeBSD.org, 'Julian Elischer' <julian@FreeBSD.org>
Subject: Re: m_pullup - fail
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 08 Feb 2012 13:32:00 -0000

On Fri, Feb 03, 2012 at 07:03:11AM +0900, rozhuk.im@gmail.com wrote:
r> I am writing a netgraph node for processing UDP packets passing through the
r> router / bridge.
r> Node must fully inspect the entire contents of the package, in some cases,
r> change them.

In this case you need something like m_megapullup() that can be found in
sys/netinet/libalias/alias.c

-- 
Totus tuus, Glebius.