6 commits

Author	SHA1	Message	Date
Bruce Evans	402c1682aa	Fix misplaced idempotency #endif. ... Fix tabs and spaces in the wrong places.	1995-04-29 15:24:00 +00:00
Andrey A. Chernov	d86851edf5	Implement SLIOCSUNIT (set slip unit number)	1995-04-28 18:47:29 +00:00
Andrey A. Chernov	ca9301398c	This sl enhancement helps to keep serial line (modem) connection alive. ... It is common case when modem hangs with carier on but don't receive anything from another side. This thing commonly healed with hangup and redialing. Enhancements below allows to determine when such action is needed and inform attach program with SIGURG signal. There two ioctls set: outfill and keepalive, used from both sides of connection. Outfill repeatedly sends FRAME_END with specified timeout (i.e. 40 seconds). It is needed to get input on other side even if no user activity on slip line currently. Keepalive checks FRAME_ENDs from other side, and if no one got in specified timeout (i.e. 60 seconds, max modem retrain time), send SIGURG to attach program. I plan to add code to slattach to handle this thing too. Reviewed by: wollman	1995-03-30 20:43:32 +00:00
Paul Richards	cea1da3be2	Make idempotent. ... Submitted by: Paul	1994-08-21 05:11:48 +00:00
David Greenman	3c4dd3568f	Added $Id$	1994-08-02 07:55:43 +00:00
Rodney W. Grimes	df8bae1de4	BSD 4.4 Lite Kernel Sources	1994-05-24 10:09:53 +00:00