[systemd-devel] [PATCH] sd-dhcp: implement IPv4 link-local support

[Lennart Poettering]

On Fri, 28.02.14 09:17, Umut Tezduyar Lindskog (umut.tezduyar at axis.com) wrote:

> > > +                } else if (ll->state == IPV4LL_STATE_WAITING_PROBE ||
> > > +                           ll->state == IPV4LL_STATE_PROBING ||
> > > +                           ll->state ==
> > > + IPV4LL_STATE_WAITING_ANNOUNCE) {
> > IN_SET...
> 
> Sorry, didn't understand it. What is this?

IN_SET is a macro we have that makes comparison of a one variable
against a number of constants a bit nicer.

This:

    if (ll->state == IPV4LL_STATE_WAITING_PROBE ||
        ll->state == IPV4LL_STATE_PROBING ||
        ll->state == IPV4LL_STATE_WAITING_ANNOUNCE) ...

Becomes this:

    if (IN_SET(ll->state, 
               IPV4LL_STATE_WAITING_PROBE, 
               IPV4LL_STATE_PROBING, 
               IPV4LL_STATE_WAITING_ANNOUNCE) ...

Lennart

-- 
Lennart Poettering, Red Hat