fix

src/router.rs

@@ -77,12 +77,20 @@ impl Router {
         self.addr.is_some()
     }
 
+    pub fn apply_peers(&mut self, uplink: &mut Uplink) {
+        if uplink.peers.len() == self.peers.len() {
+            for (current, new) in self.peers.values_mut().zip(&mut uplink.peers) {
+                *current = *new
+            }
+        } else if uplink.peers.len() != 0 {
+            tracing::error!("router {} peers count wrong. local {} remote {}", self.id, self.peers.len(), uplink.peers.len());
+        }
+    }
+
     pub fn on_message(&mut self, uplink: &mut Uplink, addr: SocketAddr, updating: &mut UpdatingState, now: Instant) -> Option<Downlink> {
         match uplink.action {
             MessageType::Query => {
-                for (current, new) in self.peers.values_mut().zip(&mut uplink.peers) {
-                    *current = *new
-                }
+                self.apply_peers(uplink);
                 Some(Downlink {
                     action: MessageType::Full,
                     version: self.version,
@@ -97,14 +105,11 @@ impl Router {
                     self.via.append(&mut uplink.via);
                     self.plan.append(&mut uplink.plan);
                     self.online(addr, now);
-                    tracing::info!("router {} full via={:?}", self.id, self.via);
                 }
                 None
             }
             MessageType::Update => {
-                for (current, new) in self.peers.values_mut().zip(&mut uplink.peers) {
-                    *current = *new
-                }
+                self.apply_peers(uplink);
                 if uplink.version == self.version {
                     self.online(addr, now);
                     if updating.router_id == self.id {