From owner-freebsd-hackers@FreeBSD.ORG  Mon Mar 21 19:23:21 2005
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 4D0B816A4CE
	for <freebsd-hackers@freebsd.org>;
	Mon, 21 Mar 2005 19:23:21 +0000 (GMT)
Received: from arc.nasa.gov (pony2pub.arc.nasa.gov [128.102.31.42])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 251AE43D2F
	for <freebsd-hackers@freebsd.org>;
	Mon, 21 Mar 2005 19:23:21 +0000 (GMT)
	(envelope-from jtoung@arc.nasa.gov)
Received: from mrcrab.nas.nasa.gov ([129.99.139.47] verified)
  by pony2pub.arc.nasa.gov (CommuniGate Pro SMTP 4.2.8)
  with ESMTP id 17805135; Mon, 21 Mar 2005 11:18:58 -0800
From: Jerry Toung <jtoung@arc.nasa.gov>
To: hackers <freebsd-hackers@freebsd.org>
Date: Mon, 21 Mar 2005 11:18:04 -0800
User-Agent: KMail/1.5.4
MIME-Version: 1.0
Content-Type: text/plain;
  charset="us-ascii"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200503211118.04155.jtoung@arc.nasa.gov>
cc: Archie Cobbs <archie@dellroad.org>
Subject: ng_tty problem
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
Reply-To: jtoung@arc.nasa.gov
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 21 Mar 2005 19:23:21 -0000

Hello List,
I want to monitor traffic on serial port /dev/cuaa0.
I am trying to build the following netgraph.

socket <---> tee node <---> tty node

I run ngctl manually with the error message below:

+ mkpeer . tee hook1 left
+ name .:hook1 mytee
+ mkpeer mytee: tty right hook
ngctl : send msg: Operation not permitted

Why is this?

Although kldstat -v shows ng_socket.ko, ng_tty.ko and ng_tee.ko

+ list command only shows socket and tee nodes.

What is the righ way of using ng_tty?

Thank you in advance.
Jerry