From 6836d6112799bb52f9be9f6aaffd47153010316d Mon Sep 17 00:00:00 2001
From: Luna Yao <40349250+ZnqbuZ@users.noreply.github.com>
Date: Wed, 18 Feb 2026 18:52:58 +0100
Subject: [PATCH] utils: add a parse function for DNS name

---
 easytier/src/dns/utils.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/easytier/src/dns/utils.rs b/easytier/src/dns/utils.rs
index 192d7121..908c656b 100644
--- a/easytier/src/dns/utils.rs
+++ b/easytier/src/dns/utils.rs
@@ -6,6 +6,7 @@ use serde_with::{DeserializeFromStr, SerializeDisplay};
 use std::fmt::{Display, Formatter};
 use std::net::{IpAddr, SocketAddr};
 use std::str::FromStr;
+use hickory_proto::rr::LowerName;
 use url::Url;
 
 pub fn sanitize(name: &str) -> String {
@@ -34,6 +35,16 @@ pub fn sanitize(name: &str) -> String {
     name
 }
 
+pub fn parse(name: &str) -> LowerName {
+    if let Ok(name) = name.parse() {
+        name
+    } else {
+        let sanitized = sanitize(&name);
+        tracing::debug!("invalid hostname: {}, sanitized to: {}", name, sanitized);
+        sanitized.parse().unwrap_or_default()
+    }
+}
+
 static DNS_SUPPORTED_PROTOCOLS: [Protocol; 2] = [
     Protocol::Udp,
     Protocol::Tcp,