I try to add hotplug-script, which starts a sh-script if ip-address changes on specific wan interface (per dhcp-client).
Please, help to trigger hotplug events/variables for this event. Where the script should be placed (/etc/hotplug.d/dhcp/)?

My openvpn-client  is bounded to one of wan-interfaces on openwrt router. If the ip address changes it is disfunctional. So, I'd like to fix it.

Thank you in advance.

P.S. current openwrt from master-branch is used.