Re: [PATCH lnf-queue] api: add nfq_nlmsg_get_timestamp helper

[Florian Westphal <fw@strlen.de>]

Pablo Neira Ayuso <pablo@netfilter.org> wrote:
> Hi Florian,
> 
> On Thu, Aug 22, 2013 at 05:07:17PM +0200, Florian Westphal wrote:
> > The NFQA_TIMESTAMP structure is in network byte order, so it seems
> > appropriate to add a helper to convert it to a timeval struct.
[..]

> I think we can update nfq_get_timestamp to use libmnl without breaking
> backward compatibility. Same thing with all other getter functions
> that we have.

How did you plan to do this without breaking api/abi?

To call the existing libnfnetlink based function given an libmnl attr[] array
you need to:

struct nfq_data d;
d.data = (void **) &attr[1];
nfq_get_timestamp(&d, &tv);

Which is just "ewww".