Re: [PATCH RFC nf-next 0/2] ct helper object name matching

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On Tue, Mar 09, 2021 at 10:18:17PM +0100, Florian Westphal wrote:
> Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote:
> > From nftables, existing (inconsistent) syntax can be left in place for
> > backward compatibility. The new proposed syntax would more explicitly
> > refer to match the user wants to do, e.g.
> > 
> > 	ct helper name set "ftp-21"
> 
> That would be same as 'ct helper set "ftp-21" that we use at the
> moment, i.e. this generates same byte code, correct?

Yes.

> > 	ct helper name "ftp-21"
> 
> I see, kernel ct extension gains a pointer to the objref name.
> 
> > For NFT_CT_HELPER_TYPE (formerly NFT_CT_HELPER), syntax would be:
> > 
> > 	ct helper type "ftp"
> 
> That would be the 'new' name for existing 'ct helper', so same bytecode,
> correct?

Yes.

> > It should be also possible to support for:
> > 
> > 	ct helper type set "ftp"
> 
> IIRC another argument for objref usage was that this won't work
> with set infra.

Right. The (missing) implicit object support would make it fit into
the set infrastructure.

> > via implicit object, this infrastructure is missing in the kernel
> > though, the idea would be to create an implicit object that is attached
> > to the rule.  Such object would be released when the rule is removed.
> 
> Ah, I see.
> 
> Yes, that would work.
> 
> > Let me know.
> 
> Looks good to me.

Thanks for reviewing.



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