fix superClient

Tun/Super/SDLSuperClient.swift

@@ -22,9 +22,7 @@ actor SDLSuperClient {
     // 数据流
     public let messageStream: AsyncThrowingStream<SDLQUICInboundMessage, Error>
     private let messageCont: AsyncThrowingStream<SDLQUICInboundMessage, Error>.Continuation
-    
-    private var pendingConnectionError: Error?
-    
+
     private let connection: NWConnection
     private let maxBufferSize: Int
     
@@ -68,21 +66,14 @@ actor SDLSuperClient {
             return
         }
 
-        self.connection.stateUpdateHandler = { [weak self] state in
-            SDLLogger.log("[SDLSuperClient] new state: \(state)", for: .debug)
-            Task {
-                await self?.handleConnectionState(state: state)
-            }
-        }
-        self.connection.start(queue: queue)
-
+        let stateStream = Self.makeStateStream(for: self.connection)
         defer {
             self.stop()
         }
 
         try await withTaskCancellationHandler {
-            try await self.waitUntilReady()
-            try await self.readLoop()
+            self.connection.start(queue: self.queue)
+            try await self.runStateLoop(stateStream)
         } onCancel: {
             self.connection.cancel()
         }
@@ -99,35 +90,48 @@ actor SDLSuperClient {
 
         preconditionFailure("invalid super server IP: \(ip)")
     }
-    
-    private func handleConnectionState(state: NWConnection.State) {
-        switch state {
-        case .ready:
-            self.state = .running
-        case .failed(let error):
-            self.pendingConnectionError = SDLSuperError.connectionFailed(error)
-            self.messageCont.finish(throwing: SDLSuperError.connectionFailed(error))
-        case .cancelled:
-            self.pendingConnectionError = SDLSuperError.connectionCancelled
-            self.messageCont.finish(throwing: SDLSuperError.connectionCancelled)
-        default:
-            ()
+
+    private static func makeStateStream(for connection: NWConnection) -> AsyncThrowingStream<NWConnection.State, Error> {
+        return AsyncThrowingStream(bufferingPolicy: .bufferingNewest(16)) { continuation in
+            connection.stateUpdateHandler = { state in
+                SDLLogger.log("[SDLSuperClient] new state: \(state)", for: .debug)
+                continuation.yield(state)
+
+                switch state {
+                case .failed(let error):
+                    continuation.finish(throwing: SDLSuperError.connectionFailed(error))
+                case .cancelled:
+                    continuation.finish(throwing: SDLSuperError.connectionCancelled)
+                default:
+                    break
+                }
+            }
+
+            continuation.onTermination = { _ in
+                connection.stateUpdateHandler = nil
+            }
         }
     }
-    
-    private func waitUntilReady() async throws {
-        while true {
+
+    private func runStateLoop(_ stateStream: AsyncThrowingStream<NWConnection.State, Error>) async throws {
+        for try await state in stateStream {
             try Task.checkCancellation()
 
-            if case .running = self.state {
+            switch state {
+            case .ready:
+                self.state = .running
+                try await self.readLoop()
                 return
+            case .failed(let error):
+                let wrappedError = SDLSuperError.connectionFailed(error)
+                self.messageCont.finish(throwing: wrappedError)
+                throw wrappedError
+            case .cancelled:
+                self.messageCont.finish(throwing: SDLSuperError.connectionCancelled)
+                throw SDLSuperError.connectionCancelled
+            default:
+                break
             }
-
-            if let pendingConnectionError {
-                throw pendingConnectionError
-            }
-
-            try await Task.sleep(for: .milliseconds(100))
         }
     }