From owner-freebsd-hackers@FreeBSD.ORG Tue Mar 8 22:49:43 2005 Return-Path: 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 9763316A4CE for ; Tue, 8 Mar 2005 22:49:43 +0000 (GMT) Received: from pony2pub.arc.nasa.gov (pony2pub.arc.nasa.gov [128.102.31.42]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7551143D41 for ; Tue, 8 Mar 2005 22:49:43 +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 4.2.6) with ESMTP id 17520652; Tue, 08 Mar 2005 14:49:42 -0800 From: Jerry Toung To: Stephan Uphoff Date: Tue, 8 Mar 2005 14:49:32 -0800 User-Agent: KMail/1.5.4 References: <200503081404.39320.jtoung@arc.nasa.gov> <1110320765.29804.7607.camel@palm> In-Reply-To: <1110320765.29804.7607.camel@palm> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200503081449.32741.jtoung@arc.nasa.gov> cc: hackers Subject: Re: send data to serial port from kernel code 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Mar 2005 22:49:43 -0000 Because all my IP traffic is directed to kernel module I wrote. It appends some headers after the IP header and when it's done with the specific processing, the packet can now be sent. At that point I used to make a call to the ethernet output routine (*ifp->if_start)() and all is well. Today I have a new requirement. I need to send those packets to the first serial port from the kernel module. Still looking for inputs. Thank you On Tuesday 08 March 2005 02:26 pm, Stephan Uphoff wrote: > 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 > > > > 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 -- --------------------------------------------------- Jerry Toung Network Software Engineer, AMTI NASA Ames Research Center mail stop: 258-6 Moffett Field, CA 94035 tel: 650-604-1310 ---------------------------------------------------