src/sys/net/slip.h, branch release/7.0.0_cvs

This commit was manufactured by cvs2svn to create tag

2008-02-24T05:45:17+00:00

'RELENG_7_0_0_RELEASE'.

This commit was manufactured to restore the state of the 7.0-RELEASE image.

Remove advertising clause from University of California Regent's

2004-04-07T20:46:16+00:00

license, per letter dated July 22, 1999 and email from Peter Wemm,
Alan Cox and Robert Watson.

Approved by: core, peter, alc, rwatson

$Id$ -> $FreeBSD$

1999-08-28T01:08:13+00:00

Back out part 1 of the MCFH that changed $Id$ to $FreeBSD$. We are not

1997-02-22T09:48:43+00:00

ready for it yet.

Make the long-awaited change from $Id$ to $FreeBSD$

1997-01-14T07:20:47+00:00

This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.

Boy, I'm glad we're not using sup anymore.  This update would have been
insane otherwise.

Fix misplaced idempotency #endif.

1995-04-29T15:24:00+00:00

Fix tabs and spaces in the wrong places.

Implement SLIOCSUNIT (set slip unit number)

1995-04-28T18:47:29+00:00

This sl enhancement helps to keep serial line (modem) connection alive.

1995-03-30T20:43:32+00:00

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

Make idempotent.

1994-08-21T05:11:48+00:00

Submitted by:	Paul

Added $Id$

1994-08-02T07:55:43+00:00