Re: [systemd-devel] dhcp address change callback?

2016-01-28 Thread Johannes Ernst
> On Jan 25, 2016, at 4:43, Lennart Poettering wrote: > > On Sat, 23.01.16 14:22, Johannes Ernst (johannes.er...@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

Re: [systemd-devel] dhcp address change callback?

2016-01-25 Thread Lennart Poettering
On Sat, 23.01.16 14:22, Johannes Ernst (johannes.er...@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

Re: [systemd-devel] dhcp address change callback?

2016-01-25 Thread Lennart Poettering
On Mon, 25.01.16 05:08, J Decker (d3c...@gmail.com) wrote: > On Mon, Jan 25, 2016 at 4:43 AM, Lennart Poettering > wrote: > > On Sat, 23.01.16 14:22, Johannes Ernst (johannes.er...@gmail.com) wrote: > > > >> Is there a way to receive a callback when a dhcp client-side IP

Re: [systemd-devel] dhcp address change callback?

2016-01-25 Thread J Decker
On Mon, Jan 25, 2016 at 4:43 AM, Lennart Poettering wrote: > On Sat, 23.01.16 14:22, Johannes Ernst (johannes.er...@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

Re: [systemd-devel] dhcp address change callback?

2016-01-25 Thread Dan Williams
On Mon, 2016-01-25 at 14:27 +0100, Lennart Poettering wrote: > On Mon, 25.01.16 05:08, J Decker (d3c...@gmail.com) wrote: > > > On Mon, Jan 25, 2016 at 4:43 AM, Lennart Poettering > > wrote: > > > On Sat, 23.01.16 14:22, Johannes Ernst (johannes.er...@gmail.com) > > >

Re: [systemd-devel] dhcp address change callback?

2016-01-25 Thread Lennart Poettering
On Mon, 25.01.16 10:25, Dan Williams (d...@redhat.com) wrote: > While it would be nice to attach metadata to addresses to indicate that > an address came from DHCP or RA or PPP or LL or whatever, the kernel > has no facility for that so users are stuck asking management daemons > like networkd or

Re: [systemd-devel] dhcp address change callback?

2016-01-24 Thread J Decker
There isn't. Arch Linux proposes a cron job that runs every so often. They say there's support in the C library; but I was unable to identify where that was so I could add a clone of existing exec( some_configured_script ); Seems like something really easy to add, but noone has taken this as a

[systemd-devel] dhcp address change callback?

2016-01-23 Thread Johannes Ernst
Is there a way to receive a callback when a dhcp client-side IP address changes? Use case: dynamic DNS update. Thanks, Johannes. ___ systemd-devel mailing list systemd-devel@lists.freedesktop.org