fix SuperClient

Tun/Super/SDLSuperClient.swift

@@ -54,13 +54,14 @@ actor SDLSuperClient {
             },
             queue
         )
-        SDLLogger.log("[SDLSuperClient] start with tls protocol", for: .debug)
         
         let params = NWParameters(tls: options)
         // 关键：让 Network.framework 忽略系统代理
         params.preferNoProxies = true
         
         self.connection = NWConnection(host: Self.makeEndpointHost(address: serverEndpoint.ip), port: .init(rawValue: port)!, using: params)
+        
+        SDLLogger.log("[SDLSuperClient] start with tls protocol", for: .debug)
     }
     
     func start() {
@@ -158,6 +159,10 @@ actor SDLSuperClient {
     }
     
     private static func readOnce(connection: NWConnection) async throws -> Data {
+        guard connection.state == .ready else {
+            throw SDLSuperError.connectionCancelled
+        }
+        
         let readContinuation = OnceContinuation<Data, Error>()
         
         return try await withTaskCancellationHandler {