Notification of change of IP address/Routing etc

From: Martin Stiemerling <mls.ietf_at_gmail.com>
Date: Wed, 31 Aug 2022 08:18:44 UTC
Hi,

I am looking for a mechanism to get a notification from the OS when, for instance, an IP address on an interface or a routing entry is being changed. 

I came across devd, but this is AFAIK only for IFUP/IFDOWN/IFATTACH events but not beyond. 

Thanks in advance,

  Martin