[systemd-devel] Mobile broadband modems support in systemd-networkd

[Dan Nicholson]

On Mon, Aug 23, 2021 at 2:41 PM Bruce A. Johnson
<bjohnson at blueridgenetworks.com> wrote:
> I suspect that ModemManager needs to be changed to inform systemd-networkd.

Nothing needs to change in ModemManager. networkd would need to be
changed to integrate with ModemManager over D-Bus. The communication
would go in 2 directions - networkd telling ModemManager to change
states and networkd listening for state changes from ModemManager.
FWIW, the NetworkManager code to integrate with ModemManager is in
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/tree/main/src/core/devices/wwan.
It uses libmm-glib, but that's really just a convenience wrapper
around the D-Bus interfaces.

Dan