Date: Tue, 24 Sep 1996 19:27:47 -0500 (CDT) From: David Kelly <dkelly@hiwaay.net> To: (Hans Zuidam) <hans@brandinnovators.com> Cc: John Perry <perry@alpha.jpunix.com>, freebsd-hackers@freebsd.org Subject: RE: SLIP and ptys Message-ID: <XFMail.960924193301.dkelly@hiwaay.net> In-Reply-To: <199609241502.RAA08319@truk.brandinnovators.com>
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On 22:02:45 hans@brandinnovators.com wrote: >>Hi, > >I'm experimenting with TCP/IP and for testing I thought of the >following setup: > > > n-freebsd +------+ n-test > -----------o-------| push |-------o--------- > ttypa ptypa +------+ ptypb ttypb > (s) (m) (m) (s) > >i.e. I use two pty's each configured as SLIP interfaces (slattach) >in the ttyp[ab] side. On the pty[ab] side I have a simple process >which select()'s on both ptys for data and pushing it to the opposite >one. This works with ping and telnet, but ftp is giving trouble. >After a while data stops flowing and nothing happens. I would be >grateful for any ideas. I'd be interested also too. A couple of weeks ago when I last tried it, I couldn't get slattach to run on a PTY at all. It barfed on TIOCSCTTY or some such. Maybe I was running it on the wrong side of a pty pair? Quite likely. Anyhow, the above setup is similar to what I was attempting to establish a connection between the kernel and an amateur radio TCP/IP stack known as TNOS <http://www.lantz.com>. Got tired trying to make it work so I routed slattach out /dev/ttyd5 and in TNOS on /dev/ttyd4. So at least I know something is working now. 73,
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