*BSD News Article 28781


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From: timj@tiac.net (Tim Jackson)
Newsgroups: comp.os.386bsd.questions
Subject: NetBSD TCP/IP Networking BUG
Date: 24 Mar 1994 21:26:31 GMT
Organization: The Internet Access Company
Lines: 44
Message-ID: <2mt0i7$7ph@sundog.tiac.net>
NNTP-Posting-Host: max.tiac.net
X-Newsreader: TIN [version 1.2 PL2]

Hi,

	I think I have found a bug that has been in the NetBSD-current
TCP protocol engine.  Try the following :

1. telnet into a NetBSD-current machine  {My configuration is below}

2. Execute the following script.

# while [ true ]
> do
> cat /etc/termcap {or any text file}
> done

You will notice that the output will stop after a short while and will
not continue.  When doing a netstat via another session I notice
that the sending side is stuck with about 5700 characters in the
send queue.  After several minute the telnet connection breaks from
the client side.  Caveat: I have not put a Lan Detector on this
to really know the sequence of events.  I will if the developer of
the TCP protocol engine contacts me.

I have tried this on three types of i386 boxes.

1. 486/66 DX2 32MB memory NE2000 (real)
2. 386/33 8MB memory NE2000 (real)
3. 486/33 8MB memory NE2000 (real)

Any help would be appreciated since the machines are being used
to service and Internet POP.

PS> I tried this same test with FreeBSD 1.0 and it didn't lock the
session.

PSS> I tried this test from a FreeBSD box, SUNOS 4.1.3, and NetBSD.
I got the same results every time.

--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~  Timothy Jackson/TIAC - The Internet Access Company - Voice:617/275-2221  ~
~  President            - 7 Railroad Avenue           - Fax  :617/275-2224  ~
~                       - Bedford, MA 01730           - Data :617/275-0331  ~
~  timj@tiac.net                                                            ~
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