Catch interface ip address assignment event

[Alexander Rumyantsev]

Hello!

What is the proper way to catch event when ip address assigned or renewed (in case of dhcp client) via DBus?

I want to act every time ip address appeared or changed in the system, then get ActiveConnection that event belongs to.

Could not figure out from documentation. Seems I have to catch PropertiesChanged signal of org.freedesktop.NetworkManager.Connection.Active interface and then filter by Ip4Config property. Am I right or there is more straight way? 

Best regards,
Alexander.