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Re: TCP/IP checksumming

To: linux-mips@fnet.fr
Subject: Re: TCP/IP checksumming
From: Dom Sweetman <dom@algor.co.uk>
Date: Wed, 13 Nov 1996 10:49:08 GMT
In-reply-to: <9611130849.AA19484@scimitar.dolphinics.no>
References: <9611130849.AA19484@scimitar.dolphinics.no>

> After musing a bit over [the IP checksum code], I have com to the
> conclusion that at least [one] of the following two statements are
> true for Linux/MIPS:
> 
>  o  Nobody uses TCP/IP.
>  o  All TCP/IP fragments are word aligned.

I suspect that, as with most flavours of unix, checksum generation is
optional.  A non-calculated checksum is set zero, and is then not
checked by the recipient.  So the third possibility is

o IP checksums are turned off

Dominic Sweetman
dom@algor.co.uk

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