fix udpHole

Tun/UDPHole/SDLUDPHoleHandler.swift

@@ -1,7 +1,7 @@
 //
 //  SDLUDPHoleHandler.swift
 //  punchnet
-//
+//  上游的SDLUDPHole是基于actor实现的，串行实现的逻辑已经保证了SDLUDPHoleHandler的内部的一致性
 //  Created by 安礼成 on 2026/5/22.
 //
 import Foundation
@@ -23,9 +23,6 @@ final class SDLUDPHoleHandler: ChannelInboundHandler {
     public let messageStream: AsyncThrowingStream<SDLHoleDatagram, Error>
     private let messageContinuation: AsyncThrowingStream<SDLHoleDatagram, Error>.Continuation
     
-    private let locker = NSLock()
-    private var isStopped: Bool = false
-
     // 启动函数
     init() throws {
         let (stream, continuation) = AsyncThrowingStream.makeStream(of: SDLHoleDatagram.self, bufferingPolicy: .bufferingNewest(2048))
@@ -102,16 +99,6 @@ final class SDLUDPHoleHandler: ChannelInboundHandler {
     }
         
     func stop() {
-        locker.lock()
-        defer {
-            locker.unlock()
-        }
-        
-        guard !self.isStopped else {
-            return
-        }
-        self.isStopped = true
-        
         self.messageContinuation.finish()
         let channel = self.channel
         self.channel = nil