Re: [PATCH nft] src: allow to map key to nfqueue number

[Florian Westphal <fw@strlen.de>]

Florian Westphal <fw@strlen.de> wrote:
> > From userdata path it should be possible to check for this special
> > internal queue_datatype then encode the queue number type in the TLV.
> 
> I have no idea how to do any of this.  I don't even know what a "queue number
> type" is.
> 
> How on earth do i flip the data type on postprocessing without any idea
> what "2 octets worth of data" is?

You seem to dislike EXPR_TYPE; I tried to sketch something but i would
turn EXPR_VALUE into EXPR_TYPE, including EXPR_TYPEOF_NFQUEUE_ID and
the udata build/parse functions, with the addition of a

 /* Dummy alias of integer_type for nf_queue id numbers */
 const struct datatype integer_queue_type = {

that has no actual function except to override what constant_expr_print()
ends up doing.

TL;DR I give up.