From owner-freebsd-hackers@FreeBSD.ORG  Tue Mar  8 22:26:08 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 E543916A4CE
	for <freebsd-hackers@freebsd.org>;
	Tue,  8 Mar 2005 22:26:08 +0000 (GMT)
Received: from duchess.speedfactory.net (duchess.speedfactory.net
	[66.23.201.84])	by mx1.FreeBSD.org (Postfix) with SMTP id 46C9143D39
	for <freebsd-hackers@freebsd.org>;
	Tue,  8 Mar 2005 22:26:08 +0000 (GMT)	(envelope-from ups@tree.com)
Received: (qmail 11261 invoked by uid 89); 8 Mar 2005 22:26:06 -0000
Received: from duchess.speedfactory.net (66.23.201.84)
  by duchess.speedfactory.net with SMTP; 8 Mar 2005 22:26:06 -0000
Received: (qmail 11226 invoked by uid 89); 8 Mar 2005 22:26:06 -0000
Received: from unknown (HELO palm.tree.com) (66.23.216.49)
  by duchess.speedfactory.net with SMTP; 8 Mar 2005 22:26:06 -0000
Received: from [127.0.0.1] (localhost.tree.com [127.0.0.1])
	by palm.tree.com (8.12.10/8.12.10) with ESMTP id j28MQ5w6047275;
	Tue, 8 Mar 2005 17:26:05 -0500 (EST)
	(envelope-from ups@tree.com)
From: Stephan Uphoff <ups@tree.com>
To: jtoung@arc.nasa.gov
In-Reply-To: <200503081404.39320.jtoung@arc.nasa.gov>
References: <200503081404.39320.jtoung@arc.nasa.gov>
Content-Type: text/plain
Message-Id: <1110320765.29804.7607.camel@palm>
Mime-Version: 1.0
X-Mailer: Ximian Evolution 1.4.6 
Date: Tue, 08 Mar 2005 17:26:05 -0500
Content-Transfer-Encoding: 7bit
cc: hackers <freebsd-hackers@freebsd.org>
Subject: Re: send data to serial port from kernel code
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
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: Tue, 08 Mar 2005 22:26:09 -0000

On Tue, 2005-03-08 at 17:04, Jerry Toung wrote:
> Good afternoon list,
> I am looking for a way to write data to the serial interface (/dev/cuaa0) from 
> a kernel module and also read /dev/ttyd0 still from that same kernel module.
> Any pointers to doing that will be great.
> 
> I want on exchange IP traffic from FreeBSD to another host with different OS 
> via serial cable (null modem). So instead of making a call the NIC driver, I 
> want to use the serial port as may physical layer.
> Any other ideas for doing this is welcome as well.
> 
> I know the basics of serial programming from a regular C application:
> 
> #include <termios.h>
> 
> fd = open("/dev/cuaa0", O_RDWR|O_NDELAY)
> tcsetattr and tcgetattr
> etc etc.
> 
> 
> but that's not what I am looking for.
> 
> Thank you.
> Jerry

What is wrong with just using PPP ?

Stephan