}
}
let mut asn_set = HashSet::with_capacity(cmp::max(v4_set.len(), v6_set.len()));
+ asn_set.insert(0);
for a in v4_set.iter().filter(|a| asn_set.insert(bgp_client.get_asn(**a))).choose_multiple(&mut rng, 21) {
dns_buff += &format!("x{:x}.dnsseed\tIN\tA\t{}\n", i, a);
}
asn_set.clear();
+ asn_set.insert(0);
for a in v6_set.iter().filter(|a| asn_set.insert(bgp_client.get_asn(**a))).choose_multiple(&mut rng, 12) {
dns_buff += &format!("x{:x}.dnsseed\tIN\tAAAA\t{}\n", i, a);
}