ipv4 table dn42v4;
ipv6 table dn42v6;

function dn42_is_valid_network() {
  return net ~ [
    172.20.0.0/14{21,29}, # dn42
    172.20.0.0/24{28,32}, # dn42 Anycast
    172.21.0.0/24{28,32}, # dn42 Anycast
    172.22.0.0/24{28,32}, # dn42 Anycast
    172.23.0.0/24{28,32}  # dn42 Anycast
  ];
}

function dn42_is_valid_network_v6() {
  return net ~ [
    fd00::/8{44,64} # ULA address space as per RFC 4193
  ];
}

protocol pipe dn42v4_sync {
  table dn42v4;
  peer table master4;
  export filter {
    if bgp_large_community ~ [(DN42_ASN, 3,*)] then reject;
    accept;
    };
}
protocol pipe dn42v6_sync {
  table dn42v6;
  peer table master6;
  export filter {
    if bgp_large_community ~ [(DN42_ASN, 3,*)] then reject;
    accept;
    };
}