New Line Discipline (HDLC)

Paul Fulghum (paulkf@microgate.com)
Wed, 13 Jan 1999 16:37:44 -0600

I am seeking input on a new line discipline I have written for use
with synchronous serial adapters (HDLC). I wrote this in conjunction
with a device driver for my company's multiprotocol serial adapter.

The goal was to use the standard tty programming and driver
interface for synchronous communications. The new line discipline
enforces a frame oriented view of data for the read and write
system calls. One write call == one HDLC frame, data returned
by one read call == one HDLC frame.

Other aspects of using the serial device remain the same
as for asynchronous use.

This has worked very well and I am preparing to submit the new
source (for 2.3.x) after the 2.2 dust settles.

Because the HDLC line discipline is intended to be generic to
any synchronous serial device driver and it is my hope that this
would be adopted as a common method for supporting synchronous
communications, I am seeking input from anyone with a common
interest before submission.

Thanks for any input,
Paul

Paul Fulghum, paulkf@microgate.com
Microgate Corporation
9501 Capital of TX Hwy
Austin, TX 78759
(512)-345-7791

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