fix

src/router.rs

-use crate::UpdatingState;
 use crate::data::{ConnectionData, RouterData};
 use crate::protocol::{Change, PeerQuality, Report};
 use crate::quality::Quality;
 use crate::settings::THROTTLE;
+use crate::UpdatingState;
 use serde::Serialize;
 use std::collections::BTreeMap;
 use std::net::SocketAddr;
@@ -64,6 +64,8 @@ impl Router {
     pub fn offline(&mut self) {
         if self.addr != None {
             tracing::info!("router {} offline", self.id);
+        } else {
+            tracing::info!("router {} offline to offline", self.id);
         }
         self.addr = None;
         for peer in self.peers.values_mut() {
@@ -101,6 +103,7 @@ impl Router {
             }
             None
         } else {
+            tracing::info!("router {} wrong ack ack={}, seq={}", self.id, data.ack, self.seq);
             // 序号不对的，忽略
             None
         }