From owner-freebsd-atm  Thu Aug 22 10:55:26 2002
Delivered-To: freebsd-atm@freebsd.org
Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id AAD1537B400
	for <freebsd-atm@FreeBSD.ORG>; Thu, 22 Aug 2002 10:55:24 -0700 (PDT)
Received: from venus.vincentjardin.net (AVelizy-102-1-5-103.abo.wanadoo.fr [80.13.229.103])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 0849C43E6E
	for <freebsd-atm@FreeBSD.ORG>; Thu, 22 Aug 2002 10:55:24 -0700 (PDT)
	(envelope-from jardin@venus.vincentjardin.net)
Received: by venus.vincentjardin.net (Postfix, from userid 501)
	id A849A15039F; Thu, 22 Aug 2002 20:08:51 +0200 (CEST)
Content-Type: text/plain;
  charset="iso-8859-1"
From: Vincent Jardin <vjardin@wanadoo.fr>
To: mark tinguely <tinguely@web.cs.ndsu.nodak.edu>,
	freebsd-atm@FreeBSD.ORG
Subject: Re: BPF into the HARP stack
Date: Thu, 22 Aug 2002 20:08:51 +0200
X-Mailer: KMail [version 1.3.1]
References: <200208221259.g7MCx3I34803@web.cs.ndsu.nodak.edu>
In-Reply-To: <200208221259.g7MCx3I34803@web.cs.ndsu.nodak.edu>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Message-Id: <20020822180851.A849A15039F@venus.vincentjardin.net>
Sender: owner-freebsd-atm@FreeBSD.ORG
Precedence: bulk
List-ID: <freebsd-atm.FreeBSD.ORG>
List-Archive: <http://docs.freebsd.org/mail/> (Web Archive)
List-Help: <mailto:majordomo@FreeBSD.ORG?subject=help> (List Instructions)
List-Subscribe: <mailto:majordomo@FreeBSD.ORG?subject=subscribe%20freebsd-atm>
List-Unsubscribe: <mailto:majordomo@FreeBSD.ORG?subject=unsubscribe%20freebsd-atm>
X-Loop: FreeBSD.org

> In my Nicstar driver, I put the hooks into the device driver, right
> after transmission, and as it recieved a new packet. In this way we
> are not HARP specific.

I saw your source code, however I would prefer a solution that is not driver 
depedent.


>
> I added a pseudo-header consisting of the following 5 octects:
>
>  DIRECTION    VPI    VCI      GFC    Payload Type    Cell Loss Priority
>    8bits      8bits 16 bits  4 bits    3 bits        1 bit
>  0x80 = transmit
>  0x00 = recieve
>
> New pcap rules have to be added to use the ATM packets with tcpdump and
> family.

Is it included into the official libpcap or tcpdump release ?

>
> when I supplied the DMA address for the first buffer of the PDU, I
> left 8 octects, so I knew I had room to add the pseudo-header without
> needing a m_pullup().

grr, the famous m_pullup issues ;-(

Thanks,
   Vincent

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-atm" in the body of the message