Multiple I/O on a serial device

Multiple I/O on a serial device

[Nicolas Olivier]

Hello,

I'm trying to setup multiple instances of locals ppp in order to test a L2TP daemon.
The problem, is that once ppp sets up the line discipline nothing can be read from or
written to the associated serial device. So I was wondering if there was an easy way
to do multiple I/O on a serial, or maybe "link" I/O of two serials.
If anyone has suggestions, it would be greatly appreciated.

Nicolas Olivier

Re: Multiple I/O on a serial device

[Miguel-Munoz]

Hi,

Now, I´m just trying to do something like this.
Somebody told me that you can use PTYs (pseudo terminals).
You can look in man: "openpty" and "forkpty".
The question is to do a simple task that create a pseudo-terminal.
This PTY is like a pipe; on one end you see the pipe, and on
the other you see a virtual ttySxx, where you can attach pppd.
After this, the new task can read from the other end and
decide if put the data to a real ttySxx.

Please, if you are suceed on it, let me know.

Miguel
----- Original Message ----- 
From: "Nicolas Olivier" <nolivier@alphalink.fr>
To: <linux-ppp@vger.kernel.org>
Sent: Wednesday, September 15, 2004 2:52 PM
Subject: Multiple I/O on a serial device


>
> Hello,
>
> I'm trying to setup multiple instances of locals ppp in order to test a
L2TP daemon.
> The problem, is that once ppp sets up the line discipline nothing can be
read from or
> written to the associated serial device. So I was wondering if there was
an easy way
> to do multiple I/O on a serial, or maybe "link" I/O of two serials.
> If anyone has suggestions, it would be greatly appreciated.
>
> Nicolas Olivier
> -
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Re: Multiple I/O on a serial device

[James Chapman]

Have you looked at OpenL2TP?

http://openl2tp.sourceforge.net/

/james

> I'm trying to setup multiple instances of locals ppp in order to
> test a L2TP daemon.
>
> The problem, is that once ppp sets up the line discipline nothing
> can be read from or written to the associated serial device. So I
> was wondering if there was an easy way to do multiple I/O on a
> serial, or maybe "link" I/O of two serials.
>
> If anyone has suggestions, it would be greatly appreciated.