[systemd-devel] [RFT] DHCPv4 support in networkd

[Patrik Flykt]

On Thu, 2014-01-02 at 16:52 +0100, Tom Gundersen wrote:
> On Thu, Jan 2, 2014 at 4:48 PM, Reindl Harald <h.reindl at thelounge.net> wrote:
> >
> >
> > Am 02.01.2014 16:41, schrieb Tom Gundersen:
> >> On Thu, Jan 2, 2014 at 4:37 PM, Reindl Harald <h.reindl at thelounge.net> wrote:
> >>> the problems are that if someone comes back with his Apple notebook
> >>> this crap starts to using the old ip-address and triggering all sorts
> >>> of alarms, firewall-rules and so on
> >>
> >> Hm, sounds odd. This protocol is precisely meant to avoid that sort of
> >> problem (by detecting whether or not you are connecting to the same
> >> network). I heard that some old Apple devices used a more naive
> >> protocol that would indeed just reuse the old IP... When did you last
> >> experience this? Any clue about what hardware/software version it was
> >> causing the problem?
> >
> > 2013, OSX 10.6, the first Mac Book Pro generation not supported
> > by OSX > 10.6 as far as i know, one bought a few months later
> > would be supported
> >
> > given that this machines are not that old and expensive they
> > will exist longer here and there (yes i know about the securtiy
> > nightmare but in that context OSX should be banned at all)
> 
> Thanks, I'll try to dig into this a bit before implementing anything
> (and anyway, I expect this to be configurable if we add it).

So from the DHCP point of view, once we'll get around to implement
Init-Reboot, let's not set up the IP address before a positive response
is received from the DHCP server. Unless RFC 4436 will give some other
indications that it indeed is the same network.

Cheers,

	Patrik