Stephen Hemminger wrote:
> Make socket filters work for netlink unicast and notifications.
> This is useful for applications like Zebra that get overrun with
> messages that are then ignored.
> 
> Note: netlink messages are in host byte order, but packet filter
> state machine operations are done as network byte order.


Do you have an example for a filter for this? I have a similar
patch that adds a new filter instruction for parsing netlink
attributes, which seemed necessary for getting at nested
attributes without too much trouble.

Attached for reference together with a libnl testing
patch for ctnetlink.