Mountain/Binary/Build/DnsCommands/StartupTime.rs
1
2//! DNS server startup-time storage. The wall-clock instant the
3//! Hickory server bound its UDP socket is captured once and
4//! returned to the webview via `dns_get_server_info`.
5//!
6//! Two siblings live here for cohesion: `init_dns_startup_time`
7//! (fire-and-forget setter called from the bind path) and
8//! private `Get` (read accessor used by `dns_get_server_info`).
9
10use std::time::{SystemTime, UNIX_EPOCH};
11
12use once_cell::sync::OnceCell;
13
14static DNS_STARTUP_TIME:OnceCell<String> = OnceCell::new();
15
16/// Records the moment the DNS server starts. Idempotent - the
17/// `OnceCell` swallows subsequent calls.
18pub fn init_dns_startup_time() {
19 let now_iso = SystemTime::now()
20 .duration_since(UNIX_EPOCH)
21 .map(|d| {
22 let secs = d.as_secs();
23 let hh = (secs % 86400) / 3600;
24 let mm = (secs % 3600) / 60;
25 let ss = secs % 60;
26 format!("T{:02}:{:02}:{:02}Z", hh, mm, ss)
27 })
28 .unwrap_or_else(|_| "unknown".to_string());
29
30 let _ = DNS_STARTUP_TIME.set(now_iso);
31}
32
33pub(super) fn Get() -> String { DNS_STARTUP_TIME.get().cloned().unwrap_or_else(|| "unknown".to_string()) }