Date: Wed, 30 May 2001 22:04:08 -0400 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Brooks Davis <brooks@one-eyed-alien.net> Cc: Bob Willcox <bob@immure.com>, Giorgos Keramidas <keramidi@otenet.gr>, Jesper Skriver <jesper@skriver.dk>, hackers list <freebsd-hackers@FreeBSD.ORG> Subject: Re: How to disable software TCP checksumming? Message-ID: <200105310204.f4V248n15260@whizzo.transsys.com> In-Reply-To: Your message of "Wed, 30 May 2001 08:51:55 PDT." <20010530085155.B24096@Odin.AC.HMC.Edu> References: <20010529144114.I19771@luke.immure.com> <20010529221107.C49875@skriver.dk> <20010529155212.M19771@luke.immure.com> <20010530045200.A1031@hades.hell.gr> <20010529235215.A60177@luke.immure.com> <20010530085155.B24096@Odin.AC.HMC.Edu>
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The TCP checksum protects more than just the contents of the packet on the wire; it's also a (somewhat) weak check on the contents of your packet sitting in memory, and as it's going over the bus in your computer between memory and peripherals and for other end-to-end sorts of issues. Of course, with rude things like NAT boxes and other network elements taking liberties with your data, this becomes less and less useful as time goes on, sigh. louie To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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