Date: Thu, 27 Sep 2001 10:16:36 -0400 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Ronald G Minnich <rminnich@lanl.gov> Cc: hackers@FreeBSD.ORG Subject: Re: TCP&IP cksum offload on FreeBSD 4.2 Message-ID: <200109271416.f8REGaZ64624@whizzo.transsys.com> In-Reply-To: Your message of "Thu, 27 Sep 2001 07:40:53 MDT." <Pine.LNX.4.33.0109270728220.26552-100000@snaresland.acl.lanl.gov> References: <Pine.LNX.4.33.0109270728220.26552-100000@snaresland.acl.lanl.gov>
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The other type of failure you might not catch are software errors; that is, where a packet is produced by the network stack and then is subsequently stomped on by a random store from some other code. Or a mis-programmed I/O card with scatter/gather capability doesn't pick up what was intended, etc. The Internet checksum is useful for detecting this class of error. Louis Mamakos To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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