From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Lunn <andrew.lunn@ascom.ch>
To: Gary Thomas <gthomas@cambridge.redhat.com>
Cc: Grant Edwards <grante@visi.com>, ecos-discuss@sources.redhat.com
Subject: Re: [ECOS] RedBoot: __eth_install_handler?
Date: Tue, 23 Jan 2001 00:13:00 -0000
Message-id: <20010123091323.P11398@biferten.ma.tech.ascom.ch>
References: <20010122161351.A26689@visi.com> <XFMail.20010122155113.gthomas@cambridge.redhat.com>
X-SW-Source: 2001-01/msg00383.html

> > The only way for that to happen would be for another host to
> > intentionally send a short Ethernet frame (AFAIK). Even if that
> > happens it should be caught by the checksum verification,
> > right?
> >
> 
> That would certainly be true - the checksum routines will try
> and access the advertised length of data.  I see no way that the
> computed value would match if the actual data was too short.

Depends if your hardware is broken, leaves checksum verification to
the software, or passes runt packets up. Its a bad assumption to
make. It was made once before and it broken when the i82559 broke this
assumption for promisc mode.

        Andrew