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Add host-to-npub static mapping with DNS hostname resolution

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Add a HostMap that resolves human-readable hostnames to npubs,
enabling `gateway.fips` instead of the full `npub1...xyz.fips`.
Two sources populate the map: peer `alias` fields from the YAML
config and an operator-maintained hosts file at /etc/fips/hosts.

The DNS responder auto-reloads the hosts file on each request by
checking the file modification time, so operators can update
mappings without restarting the daemon.

- New src/upper/hosts.rs: HostMap, HostMapReloader, hostname
  validation, hosts file parser with auto-reload on mtime change
- DNS resolver checks host map before falling back to direct npub
- Node uses host map for peer display names
- Default hosts file added to both .deb and tarball packaging
- 26 new tests (789 total)
This commit is contained in:
Johnathan Corgan
2026-03-08 18:34:54 +00:00
parent ead91c75da
commit 0bb6e70fb5
10 changed files with 1033 additions and 28 deletions
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src/node/lifecycle.rs
+5 -2
View File
@@ -448,10 +448,13 @@ impl Node {
let dns_channel_size = self.config.node.buffers.dns_channel;
let (identity_tx, identity_rx) = tokio::sync::mpsc::channel(dns_channel_size);
let dns_ttl = self.config.dns.ttl();
let handle = tokio::spawn(crate::upper::dns::run_dns_responder(socket, identity_tx, dns_ttl));
let base_hosts = crate::upper::hosts::HostMap::from_peer_configs(self.config.peers());
let hosts_path = std::path::PathBuf::from(crate::upper::hosts::DEFAULT_HOSTS_PATH);
let reloader = crate::upper::hosts::HostMapReloader::new(base_hosts, hosts_path);
info!(bind = %bind, hosts = reloader.hosts().len(), "DNS responder started for .fips domain (auto-reload enabled)");
let handle = tokio::spawn(crate::upper::dns::run_dns_responder(socket, identity_tx, dns_ttl, reloader));
self.dns_identity_rx = Some(identity_rx);
self.dns_task = Some(handle);
info!(bind = %bind, "DNS responder started for .fips domain");
}
Err(e) => {
warn!(bind = %bind, error = %e, "Failed to start DNS responder");