fix(quic): prune stopped endpoints from pool (#2195)

* remove wss port 0 compatibility code
* fix(quic): prune stopped endpoints from pool

easytier/src/common/dns.rs

@@ -73,16 +73,6 @@ pub async fn socket_addrs(
         .port()
         .or_else(default_port_number)
         .ok_or(Error::InvalidUrl(url.to_string()))?;
-    // See https://github.com/EasyTier/EasyTier/pull/947
-    // here is for compatibility with old version
-    let port = match port {
-        0 => match url.scheme() {
-            "ws" => 80,
-            "wss" => 443,
-            _ => port,
-        },
-        _ => port,
-    };
 
     // if host is an ip address, return it directly
     match host {
@@ -139,4 +129,23 @@ mod tests {
         assert_eq!(2, addrs.len(), "addrs: {:?}", addrs);
         println!("addrs2: {:?}", addrs);
     }
+
+    #[tokio::test]
+    async fn socket_addrs_preserves_explicit_zero_port() {
+        let cases = [
+            ("ws://127.0.0.1:0", 80, 0),
+            ("wss://127.0.0.1:0", 443, 0),
+            ("ws://127.0.0.1", 80, 80),
+            ("wss://127.0.0.1", 443, 443),
+        ];
+
+        for (raw_url, default_port, expected_port) in cases {
+            let url = url::Url::parse(raw_url).unwrap();
+            let addrs = socket_addrs(&url, || Some(default_port)).await.unwrap();
+            assert_eq!(
+                addrs,
+                vec![SocketAddr::from(([127, 0, 0, 1], expected_port))]
+            );
+        }
+    }
 }