From ee0ff1c4a2327f66f26c4887a43ba509dd9a76b6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Sun, 19 Jul 2026 17:09:35 +0800
Subject: [PATCH] Fix DNS route suffix matching

---
 protocol/tailscale/dns_transport.go | 2 +-
 service/resolved/transport.go       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/protocol/tailscale/dns_transport.go b/protocol/tailscale/dns_transport.go
index 42452227..08876ea9 100644
--- a/protocol/tailscale/dns_transport.go
+++ b/protocol/tailscale/dns_transport.go
@@ -267,7 +267,7 @@ func (t *DNSTransport) PreferredDomain(domain string) bool {
 		return true
 	}
 	for suffix := range routes {
-		if strings.HasSuffix(domain, suffix) {
+		if mDNS.IsSubDomain(suffix, domain) {
 			return true
 		}
 	}
diff --git a/service/resolved/transport.go b/service/resolved/transport.go
index b00f31a3..c918870a 100644
--- a/service/resolved/transport.go
+++ b/service/resolved/transport.go
@@ -201,7 +201,7 @@ func (t *Transport) PreferredDomain(domain string) bool {
 			if linkDomain.Domain == "." {
 				continue
 			}
-			if strings.HasSuffix(domain, linkDomain.Domain) {
+			if mDNS.IsSubDomain(linkDomain.Domain, domain) {
 				return true
 			}
 		}