From owner-freebsd-hackers  Fri Jan 20 09:38:09 1995
Return-Path: hackers-owner
Received: (from root@localhost) by freefall.cdrom.com (8.6.9/8.6.6) id JAA15740 for hackers-outgoing; Fri, 20 Jan 1995 09:38:09 -0800
Received: from inet-gw-3.pa.dec.com (inet-gw-3.pa.dec.com [16.1.0.33]) by freefall.cdrom.com (8.6.9/8.6.6) with SMTP id JAA15734 for <hackers@freebsd.org>; Fri, 20 Jan 1995 09:38:04 -0800
Received: from muggsy.lkg.dec.com by inet-gw-3.pa.dec.com (5.65/10Aug94)
	id AA26197; Fri, 20 Jan 95 09:34:41 -0800
Received:  from whydos.lkg.dec.com by muggsy.lkg.dec.com (5.65/DEC-Ultrix/4.3) with SMTP
	id AA24719; Fri, 20 Jan 1995 12:30:19 -0500
Received: from localhost (localhost [127.0.0.1]) by whydos.lkg.dec.com (8.6.9/8.6.9) with SMTP id NAA04311; Fri, 20 Jan 1995 13:35:39 GMT
Message-Id: <199501201335.NAA04311@whydos.lkg.dec.com>
X-Authentication-Warning: whydos.lkg.dec.com: Host localhost didn't use HELO protocol
To: Garrett Wollman <wollman@halloran-eldar.lcs.mit.edu>
Cc: hackers@FreeBSD.org
Subject: Re: NETBEUI for FreeBSD? Any docs? 
In-Reply-To: Your message of "Thu, 19 Jan 1995 20:35:35 EST."
             <9501200135.AA00248@halloran-eldar.lcs.mit.edu> 
X-Mailer: exmh version 1.5omega 10/6/94
Date: Fri, 20 Jan 1995 13:35:37 +0000
From: Matt Thomas <matt@lkg.dec.com>
Sender: hackers-owner@FreeBSD.org
Precedence: bulk


> <<On Thu, 19 Jan 1995 18:57:28 +0000, Matt Thomas <matt@lkg.dec.com> said:
> 
> > As does NETBEUI in Workgroup for Windows.  Most of the support for NETBEUI
> > already exists in FreeBSD in the netccitt directory.  NETBEUI is little more
> > than LLC2 (ISO 8802.2 Class 2) with SMB running over it.  LLC2 is really LAPB
> > slightly hacked to works over LANs.  netccitt already has the LAPB
> > engine, someone needs to add in the LAN support (as well as getting the
> > right hooks in ethersubr).
> 
> You mean like:
> 
> wollman@khavrinen(753)$ pwd
> /usr/src/sys/netccitt
> wollman@khavrinen(754)$ ls llc*
> llc_input.c     llc_output.c    llc_subr.c~     llc_var.h
> llc_input.c~    llc_subr.c      llc_timer.c
> 
> ?  Or is there something more?  (I suspect so, since the existing LLC2
> code only talks to the X.25 code.)

The llc code looks like it should work for doing the LLC2 work.  There are a
few datagrams that need to dealt with for name discovery but those should not
be hard to add.  

Adding a socket interface to the llc routines (look at the X.25 interface
to see what needs to added on the bottom) should suffice.  If I were doing
it, I'd make the interface a generic LLC2 interface with bind/listen/accept
/connect etc suppport.  (The UI packets would be delivered to the listener
to deal with -- the listener would also transmit).

The reason for that is so other LLC2 protocols could be added (such as RPL)
without additional kernel hacking.


Matt Thomas                          Internet:   matt@lkg.dec.com
U*X Networking                       WWW URL:    http://ftp.dec.com/%7Ethomas/
Digital Equipment Corporation        Disclaimer: This message reflects my
Littleton, MA                                    own warped views, etc.