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Re: about the ULID in the TCP checksum



On 4-jan-2007, at 23:39, Henderson, Thomas R wrote:

If this is a problem, it's probably better to adjust the checksum
such that it appears to be correct to a non-shim6 aware observer.
This does have the downside that incorrect address rewriting isn't
detected by the checksum, though.

Why not both twiddle the checksum at the shim so that it is aligned with
locators, and de-twiddle when deshimming?

I think I like this approach better than what's currently in the draft.

However, it does have a downside: since the checksum is adjusted when doing the shim processing, it's not possible to detect incorrect shimming using the checksum.