..
/var/log/bird.log
2019-08-22 15:38:38.604 <ERR> filters, line 1023: Stack underflow
2019-08-22 18:02:27.157 <ERR> filters, line 511: Stack underflow
2019-08-22 18:02:30.616 <ERR> filters, line 0: Stack underflow....
...
function bgp_in(int peer_as; prefix set peer_nets)
{
if ! (avoid_martians()) then return false;
if ! (net ~ peer_nets) then return false;
if (bgp_path.first != peer_as ) then return false;
# if (is_black()) then return true;
# if net.len > 24 then return false;
return true;
}
..
define DataClub_nets = [
46.183.216.0/21{21,32},
84.38.128.0/24{24,32},
84.38.130.0/24{24,32},
84.38.131.0/24{24,32},
84.38.132.0/24{24,32},
84.38.134.0/24{24,32},
84.38.135.0/24{24,32},
109.248.147.0/24{24,32},
109.248.148.0/24{24,32},
109.248.149.0/24{24,32},
185.220.116.0/24{24,32},
185.220.117.0/24{24,32},
185.220.118.0/24{24,32},
194.165.16.0/23{23,32}];
..
protocol bgp DataClub from PEERS {
description "DataClub/52048/as-dataclub";
neighbor 193.27.39.4 as 52048;
ipv4 {
import where bgp_in(52048, DataClub_nets);
export where bgp_out(52048, 64004);
};
}
...
I redid the configuration something like
...
ipv4 { import filter myfilter; ..
...
then I issue test "show route filter myfilter" and get all nets. But in fact, all these routes were filtered.
And, finally, only "accept" remained in the filter - this method unfiltered routes.
Bug, feature?
P.S.: Bird <= 2.0.3 is OK.