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use std::collections::HashSet;
use std::str::FromStr;
use anyhow::{anyhow, Result};
use aws_sdk_route53 as route53;
use aws_sdk_route53::types::{HostedZone, ResourceRecord, ResourceRecordSet, RrType};
use trust_dns_proto::rr::Name;
use crate::dns::suffixes;
use crate::hashable::Hashable;
pub trait Route53 {
fn route53(&self) -> &route53::Client;
}
pub async fn zone_for_domain<C>(name: &Name, aws_context: &C) -> Result<HostedZone>
where
C: Route53,
{
let names = suffixes(name.clone());
// Outer pagination loop needs to be pulled out to a trait - this is some hot nonsense.
let mut zone = None;
let mut depth = None;
let mut zones_marker = None;
loop {
let zones_resp = aws_context
.route53()
.list_hosted_zones()
.set_marker(zones_marker)
.send()
.await?;
let zones = zones_resp.hosted_zones().unwrap_or(&[]);
for candidate_zone in zones.iter() {
let zone_name = match candidate_zone.name() {
None => continue,
Some(name) => name,
};
let zone_name = Name::from_str(zone_name)?;
let match_position = names.iter().position(|name| *name == zone_name);
match (depth, match_position) {
(None, Some(matched_depth)) => {
zone = Some(candidate_zone.clone());
depth = Some(matched_depth);
}
(Some(found_depth), Some(matched_depth)) => {
if matched_depth < found_depth {
zone = Some(candidate_zone.clone());
depth = Some(matched_depth);
}
}
(_, _) => {}
}
}
if zones_resp.is_truncated() {
zones_marker = zones_resp.next_marker().map(String::from);
} else {
break;
}
}
zone.ok_or(anyhow!("No Route53 zone found for DNS suffix: {}", name))
}
pub async fn zone_suffix_recordsets<C>(
aws_context: &C,
zone_id: &str,
dns_name: &Name,
) -> Result<HashSet<Hashable<ResourceRecordSet>>>
where
C: Route53,
{
let mut suffix_records = HashSet::new();
let mut next_record_name = Some(dns_name.to_ascii());
let mut next_record_type = None;
let mut next_record_identifier = None;
loop {
let records_resp = aws_context
.route53()
.list_resource_record_sets()
.hosted_zone_id(zone_id)
.set_start_record_name(next_record_name)
.set_start_record_type(next_record_type)
.set_start_record_identifier(next_record_identifier)
.send()
.await?;
let recordsets = records_resp.resource_record_sets().unwrap_or(&[]);
for recordset in recordsets {
let recordset_name = recordset.name().ok_or(anyhow!(
"Record set with no name found in zone: {}",
zone_id
))?;
let recordset_name = Name::from_str(recordset_name)?;
if &recordset_name != dns_name {
break;
}
if let Some(rr_type) = recordset.r#type() {
if [RrType::A, RrType::Aaaa].contains(rr_type) {
suffix_records.insert(recordset.clone().into());
}
}
}
if records_resp.is_truncated() {
next_record_name = records_resp.next_record_name().map(String::from);
next_record_type = records_resp.next_record_type().map(Clone::clone);
next_record_identifier = records_resp.next_record_identifier().map(String::from);
} else {
break;
}
}
Ok(suffix_records)
}
pub fn recordset<I, S>(
apex_hostname: &str,
dns_ttl: i64,
rr_type: RrType,
addresses: I,
) -> ResourceRecordSet
where
I: IntoIterator<Item = S>,
S: Into<String>,
{
let apex_ip4_records = addresses
.into_iter()
.map(|address| address.into())
.map(|address| ResourceRecord::builder().value(address).build())
.collect();
ResourceRecordSet::builder()
.name(apex_hostname)
.r#type(rr_type)
.ttl(dns_ttl)
.set_resource_records(Some(apex_ip4_records))
.build()
}
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