diff --git a/Tun/Punchnet/Concurrency/SDLAsyncTimerStream.swift b/Tun/Punchnet/Concurrency/SDLAsyncTimerStream.swift
deleted file mode 100644
index 03f9fbe..0000000
--- a/Tun/Punchnet/Concurrency/SDLAsyncTimerStream.swift
+++ /dev/null
@@ -1,33 +0,0 @@
-//
-//  SDLAsyncTimerStream.swift
-//  Tun
-//
-//  Created by 安礼成 on 2026/2/3.
-//
-
-import Foundation
-
-class SDLAsyncTimerStream {
-    let timer: DispatchSourceTimer
-    let stream: AsyncStream<Void>
-    private let cont: AsyncStream<Void>.Continuation
-    
-    init() {
-        self.timer = DispatchSource.makeTimerSource(queue: .global())
-        (stream, cont) = AsyncStream.makeStream(of: Void.self)
-    }
-    
-    func start(interval: DispatchTimeInterval) {
-        timer.schedule(deadline: .now(), repeating: interval)
-        timer.setEventHandler { [weak self] in
-            self?.cont.yield()
-        }
-        timer.resume()
-    }
-    
-    deinit {
-        self.cont.finish()
-        self.timer.cancel()
-    }
-    
-}
diff --git a/Tun/Punchnet/Inbound/PacketInboundProcessor.swift b/Tun/Punchnet/Inbound/PacketInboundProcessor.swift
index 9ba880b..30d5065 100644
--- a/Tun/Punchnet/Inbound/PacketInboundProcessor.swift
+++ b/Tun/Punchnet/Inbound/PacketInboundProcessor.swift
@@ -8,6 +8,7 @@
 import Foundation
 
 final class PacketInboundProcessor {
+    
     enum ProcessingAction {
         case sendARPReply(dstMac: Data, data: Data)
         case appendARP(ip: UInt32, mac: Data)