[dev] Get router adresses from zebra

Hello, I am developping my own routing deamon based on the Zebra API included in FR Route ing. My deamon works and I am able to receive routes from zebra. I can get prefix and nexthop adresses (from ospf routers on dockers) but my problem is that I want to get routers IP adresses (or ID) of the routes I got. For the moment, I am basing my work on the ospf deamon. But I don’t understand how (and where in the code) ospf->new_rtrs is set from routes received. How can I get the routers ip adresses sent by ospf/zebra on my deamon ? Thank you for your answers. Pierre I.