From owner-freebsd-hackers Thu Feb 20 00:39:25 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id AAA29062 for hackers-outgoing; Thu, 20 Feb 1997 00:39:25 -0800 (PST) Received: from murkwood.gaffaneys.com (dialup14.gaffaneys.com [134.129.252.33]) by freefall.freebsd.org (8.8.5/8.8.5) with ESMTP id AAA29037 for ; Thu, 20 Feb 1997 00:39:20 -0800 (PST) Received: (from zach@localhost) by murkwood.gaffaneys.com (8.8.5/8.8.5) id CAA05813; Thu, 20 Feb 1997 02:39:56 -0600 (CST) To: hackers@freebsd.org Subject: Re: sbwait hang? References: <199702200206.MAA14275@genesis.atrad.adelaide.edu.au> Mime-Version: 1.0 (generated by tm-edit 7.100) Content-Type: text/plain; charset=US-ASCII From: Zach Heilig Date: 20 Feb 1997 02:39:55 -0600 In-Reply-To: Michael Smith's message of Thu, 20 Feb 1997 12:36:45 +1030 (CST) Message-ID: <87enebeuqs.fsf@murkwood.gaffaneys.com> Lines: 29 X-Mailer: Gnus v5.3/Emacs 19.34 Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Michael Smith writes: > The file is on BSD box 1. BSD box 1 has a modem on a serial port. > BSD box 2 has another mode on a serial port. BSD box 2 dials BSD > box 1, connects via SLIP. BSD box 2 attempts to transfer the File > Of Death from BSD box 1. Note that the file can come from systems > further away (BSD box 1 is a router), the transfer will still fail. > Other traffic, including larger files, moves fine. This file stops > after about 4M. Yep, I think I know the problem... I thought I was wrong when you mailed me that they were connected by serial ports, but now that you mention that there are modems on the loop, it's fairly probable that there is a sequence of bytes that need escaping (and these occur about 4Meg into the linux tar file). The modem is probably dropping or corrupting those bytes, and corrupting the packet (this might have something to do with the compression software in one of the modems). Other packets would still make it through though. Run tcpdump on the slip interface, and that should verify what's happening. BTW, what brand of modems are those? -- Zach Heilig (zach@blizzard.gaffaneys.com) | ALL unsolicited commercial email Support bacteria -- it's the only | is unwelcome. I avoid dealing form of culture some people have! | with companies that email ads.