ix-bird-config/bgp4.conf

template bgp dnpeers {
        local as OWNAS;
        table T_BGP;

        # metric is the number of hops between us and the peer
        path metric 1;

        import all;
        export all;
};

template bgp iBGP_Peer {
	local as OWNAS;
        hold time 15;
	igp table T_OSPF;
	path metric on;
	import keep filtered;
#	import where iBGP_import_peer_policy();
#	export where iBGP_export_peer_policy();
	import all;
	export all;
	source address OWNIP_IBGP;
	next hop self;
}

template pipe iBGP_Pipe {
	# table name will come from peer definition
	peer table master;
	import all;
	export all;
}

roa table dn42_roa {
    include "/var/lib/bird/bird_roa_dn42.conf";
};

protocol pipe {
	table master;
        peer table T_BGP;
        import filter {
		if (roa_check(dn42_roa, net, bgp_path.last) = ROA_INVALID) then {
			print "[dn42] ROA check failed for ", net, " ASN ", bgp_path.last;
			reject;
		}
		
                # accept every subnet, except our own advertised subnet
                # filtering is important, because some guys try to advertise routes like 0.0.0$
                if is_valid_network() && !is_self_net() then {
                        accept;
                }
                reject;
        };

        export filter {
                # here we export the whole net
                if is_valid_network() then {
                        accept;
                }
                reject;
        };
};