Experimental Physics and
Industrial Control System

[email protected] (Nick Rees) · Fri, 11 Oct 1996 15:33:43 -1000 (HST)

Whilst on this subject, we have a piece of code written by Bret
Goodrich at Gemini, that lurks behind a pty driver and enables you to
connect to any serial line on any terminal server anywhere on the
ethernet. The bit at the top of the source code says:

"This program acts as a VxWorks client for a remote terminal server.  The
remote host may be identified by either name or IP address.  The port must
be greater than the reserved IP port numbers (currently 1024).  A TCP socket
is connected to the remote host and a task spawned to monitor the socket.
A pseudo-terminal device is created to buffer input and output through
the socket to the user.  A typical application might look like:

        hostAdd ("sim2ioc", "140.252.15.83");
        tnetDevCreate ("/pty/tmp.", "sim2ioc", 3301);
        fd = open ("/pty/tmp.M", O_RDWR, 0);
        write (fd, "i\n", 2);
        n = read (fd, buf, 1024);    "

I must admit it isn't fully tested yet, but in principle it is very
useful for those (like us) who have a load of stupid serial devices
distributed around the place and whose nearest ethernet is closer to
them than their nearest IOC.

Nick

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System