On Fri, Jul 05, 2019 at 02:15:05PM +0200, Phil Sutter wrote:
> Trying to add a range of size 1 was previously not allowed:
>
> | # nft add element ip t s '{ 40-40 }'
> | Error: Range has zero or negative size
> | add element ip t s { 40-40 }
> | ^^^^^
>
> The error message is not correct: If a range 40-41 is of size 2 (it
> contains elements 40 and 41), a range 40-40 must be of size 1.
>
> Handling this is even supported already: If a single element is added to
> an interval set, it is converted into just this range. The implication
> is that on output, previous input of '40-40' is indistinguishable from
> single element input '40'.
What kind of human is going to generate such range? :-)
I think we can place this item in the "nft ruleset optimization"
discussion during the NFWS.
