From d94cb3a96dce17f34a516dc4f9bc65d55b2e510c Mon Sep 17 00:00:00 2001
From: Luna Yao <40349250+ZnqbuZ@users.noreply.github.com>
Date: Fri, 3 Apr 2026 16:30:23 +0200
Subject: [PATCH] peer_mgr: ignore unsupported peer

---
 easytier/src/dns/peer_mgr.rs | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/easytier/src/dns/peer_mgr.rs b/easytier/src/dns/peer_mgr.rs
index 30292112..0baf8d7a 100644
--- a/easytier/src/dns/peer_mgr.rs
+++ b/easytier/src/dns/peer_mgr.rs
@@ -99,14 +99,20 @@ impl DnsPeerMgr {
 
         self.dirty.mark();
 
-        match self.fetch(peer_id).await {
-            Ok(info) => {
-                self.peers.insert(peer_id, info).await;
-            }
-            Err(error) => {
-                tracing::warn!(%peer_id, ?error, "failed to fetch dns export config from peer");
-                self.peers.invalidate(&peer_id).await;
-            }
+        let invalidate = route.dns.is_empty()
+            || match self.fetch(peer_id).await {
+                Ok(info) => {
+                    self.peers.insert(peer_id, info).await;
+                    false
+                }
+                Err(error) => {
+                    tracing::warn!(%peer_id, ?error, "failed to fetch dns export config from peer");
+                    true
+                }
+            };
+
+        if invalidate {
+            self.peers.invalidate(&peer_id).await;
         }
 
         self.dirty.notify_one();