Callback for service changed

[JH]

Hi,

In connman Python, there is callback:

bus.add_signal_receiver(property_changed,
                bus_name="net.connman",
                dbus_interface="net.connman.Manager",
                signal_name="PropertyChanged",
                path_keyword="path")

What is the equivalent callback statement for C API?

Thank you.

Kind regards,

- jupiter