[systemd-devel] dhcp address change callback?

[J Decker]

On Mon, Jan 25, 2016 at 4:43 AM, Lennart Poettering
<lennart at poettering.net> wrote:
> On Sat, 23.01.16 14:22, Johannes Ernst (johannes.ernst at gmail.com) wrote:
>
>> Is there a way to receive a callback when a dhcp client-side IP address changes?
>>
>> Use case: dynamic DNS update.
>
> On Linux changes regarding IP configuration are reported via rtnl (aka
> routing netlink). This works regardless how the IP address was
> required, and without any extra API from networkd.
>

that's somewhat more useful information than 'there's hooks in C for
it' Is there some standard daemon that listens and can bind to these
events?
And even so; can't a few lines (configuration defintion, a variable to
store a scriptname, and a call to exec the script like using a systemd
unit to setup a network be added to a single place that already does
the change?  Even if it's a systemd service that's added that in turn
listens to rtnl?

> Lennart
>
> --
> Lennart Poettering, Red Hat
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