How to configure the ospf export filter in bird?

Question

linux

Config example

router id 255.255.255.255;

log syslog all;

protocol device {
        scan time 10;
}

filter im {
    if net ~ [ 10.0.0.0/8+ ] then reject;
    else accept;
}

protocol kernel {
        export all;
        scan time 15;
}

protocol ospf my {
        import filter im; 
        export all;
  area 0 {
    interface "br1", "tap*" {
      priority 255;
      type nonbroadcast;
      strict nonbroadcast no;
     	hello 20; retransmit 20; wait 50; dead 50;
                        authentication none;
      neighbors {
       172.17.11.1 eligible;
       172.17.11.4 eligible;
                        };
                };
        };
}

the filter on import works, but if you write it on export it doesn't help.
even if to register export none, routes all the same leave.
It is required that it sends only its own network and does not send networks received from neighbors.
I really need help.
Thank you.

Answer 1

OSPF MAY NOT send networks received from neighbors.