[ovs-discuss] How to send information from ovs to controller through Openflow

[Ben Pfaff]

On Thu, Feb 28, 2019 at 12:49:27AM +0700, Tuyen Dinh wrote:
> I'm doing a project that need to modify ovs source code to do some
> statistics about the packets (which I can't get that information from flow
> tables). After get that statistics , I need to send them to the controller.
> As far as I know, Openvswitch has the vswitchd deamon which communicate
> with the controller through Openflow protocol. How can I add a new type of
> Openflow message or modify an available message to attach that information
> and send to the controller? Where is the function or module in Openvswitch
> responsible for that job?

This is in the FAQ.