From owner-freebsd-hackers Thu Mar 16 09:20:54 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id JAA13442 for hackers-outgoing; Thu, 16 Mar 1995 09:20:54 -0800 Received: from hda.com (hda.com [199.232.40.182]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id JAA13429 for ; Thu, 16 Mar 1995 09:20:52 -0800 Received: (dufault@localhost) by hda.com (8.6.9/8.3) id MAA04543; Thu, 16 Mar 1995 12:17:23 -0500 From: Peter Dufault Message-Id: <199503161717.MAA04543@hda.com> Subject: Re: Splicing in a new serial line protocol To: bde@zeta.org.au (Bruce Evans) Date: Thu, 16 Mar 1995 12:17:23 -0500 (EST) Cc: freebsd-hackers@freefall.cdrom.com In-Reply-To: <199503161710.DAA31846@godzilla.zeta.org.au> from "Bruce Evans" at Mar 17, 95 03:10:38 am X-Mailer: ELM [version 2.4 PL24] Content-Type: text Content-Length: 918 Sender: hackers-owner@FreeBSD.org Precedence: bulk Bruce Evans writes: > > >Would anyone care to comment on where to splice in a new serial line > >protocol? I haven't looked at the code at all yet; I plan on looking > >later on today. > > Look at if_sl.c. Don't cp it :-). After looking I'm not tempted... That would be awful big hammer. I immediately notice this: /* * SLIP ABORT ESCAPE MECHANISM: * (inspired by HAYES modem escape arrangement) * 1sec escape 1sec escape 1sec escape { 1sec escape 1sec escape } * within window time signals a "soft" exit from slip mode by remote end * if the IFF_DEBUG flag is on. */ Has anyone ever seen discussion about Hayes US patent 4,549,302 (where they claim a patent on the idea of pausing after an escape sequence) and this code? Peter -- Peter Dufault Real Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267