From owner-freebsd-questions@FreeBSD.ORG  Fri Jun 15 14:50:59 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 8361A16A46D
	for <freebsd-questions@freebsd.org>;
	Fri, 15 Jun 2007 14:50:59 +0000 (UTC)
	(envelope-from gigi_8439@yahoo.fr)
Received: from smtp009.mail.ukl.yahoo.com (smtp009.mail.ukl.yahoo.com
	[217.12.11.63]) by mx1.freebsd.org (Postfix) with SMTP id E302213C468
	for <freebsd-questions@freebsd.org>;
	Fri, 15 Jun 2007 14:50:58 +0000 (UTC)
	(envelope-from gigi_8439@yahoo.fr)
Received: (qmail 2979 invoked from network); 15 Jun 2007 14:24:18 -0000
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.fr;
	h=Received:X-YMail-OSG:Mime-Version:Content-Transfer-Encoding:Message-Id:Content-Type:To:From:Subject:Date:X-Mailer;
	b=DEy/Vv77rpPqe1rtxiWa2VRzzFqpTpm8r1AYok1ziBDgWcg5EcVFuxzdMLO+n+WTOA67YVjXdY9palNerqPs4yxMcdtdMscZ7Ng3Z/znE/3QzDtGbQOZvOL//zBCbgGVLSnMM1OTxUDqLZWdy6dudgxgyFE5FGQVQcbKJ90SnzQ=
	; 
Received: from unknown (HELO ?10.2.1.1?) (gigi_8439@217.128.170.68 with plain)
	by smtp009.mail.ukl.yahoo.com with SMTP; 15 Jun 2007 14:24:18 -0000
X-YMail-OSG: .FLhGI0VM1kNyY10fBQW7Cf0zj3CNwoLDgsIAlcRZ7a7Mn7aIeUKlXun0.Q0SLqHlKnWiVoyvg--
Mime-Version: 1.0 (Apple Message framework v752.3)
Content-Transfer-Encoding: 7bit
Message-Id: <AF02899D-E5F1-432D-BA19-D3D7DB22305E@yahoo.fr>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
To: freebsd-questions@freebsd.org
From: Ghislain <gigi_8439@yahoo.fr>
Date: Fri, 15 Jun 2007 16:25:04 +0200
X-Mailer: Apple Mail (2.752.3)
Subject: BPF and buffering
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 15 Jun 2007 14:50:59 -0000

Hi,

I'd like to write a specific BPF filter in order to read all packets  
( before routing them ) on a network interface and buffering them in  
order to process them and after routing them if I decide that they  
are correct. But I don't know how to intercept them ( then they are  
not processed immediatly by the kernel ) in order to buffering them  
before giving them back to the kernel.

Can you show me example, tutorials or documentation.

Thanks

Ghislain