为什么IAsyncResult报告所有端口为打开状态？

概述我在线程中运行此方法,但是当我对其进行测试时,将所有端口报告为开放.似乎该方法：varresult=client.BeginConnect(host,port,null,null);在varsuccess=result.AsyncWaitHandle.WaitOne(tcpTimeout)中传递结果时,效果不佳…知道如何解决吗？我已经尝试过client.ConnectAsync(ho

我在线程中运行此方法,但是当我对其进行测试时,将所有端口报告为开放.似乎该方法：var result = clIEnt.BeginConnect(host,port,null,null);在var success = result.AsyncWaitHandle.WaitOne(tcpTimeout)中传递结果时,效果不佳…

知道如何解决吗？

我已经尝试过clIEnt.ConnectAsync(host,port).Wait(TcpTimeout);但这也无法按预期工作….

    public voID start()    {        Thread thread1 = new Thread(new ThreadStart(RunScanTcp));        thread1.IsBackground = true;        thread1.name = "THREAD ME EMER : " + i;        thread1.Priority = System.Threading.ThreadPriority.Highest;        thread1.Start();   }public voID RunScanTcp(){        while (((port = portList.NextPort()) != -1) && (nderprit != true))        {            TcpClIEnt clIEnt = new TcpClIEnt();            count = port;            tcp_count = tcp_count + 1;            Thread.Sleep(10);            try            {                var mre = new ManualresetEvent(false);                Console.Writeline("Current port count : " + port);                var result = clIEnt.BeginConnect(host, port, null, null);                var success = result.AsyncWaitHandle.WaitOne(tcpTimeout);                if (success)                {                    Console.Writeline("PORT IS OPEN : " + port);                    received_tcp = received_tcp + 1;                    Activity.RunOnUiThread(() =>                    {                        mre.Set();                    });                    mre.WaitOne();                    clIEnt.Close();                }                else                {                    clIEnt.Close();                }            }            catch (Exception)            {                clIEnt.Close();            }        }}

解决方法:

执行EndConnect时,根据非异常确定端口是否打开.

串行端口扫描的示例：

注意：如果您希望同时扫描多个端口,请使用一些linq将您的端口列表分成几组并执行Parallel.ForEach(并发4效果很好,并且不会淹没AndroID网络堆栈).

bool portopen;for (int portNo = 1; portNo < (fasttScan ? 1025 : 65537); portNo++){    TcpClIEnt clIEnt = new TcpClIEnt    {        SendTimeout = (fasttScan ? 2 : 10),        ReceiveTimeout = (fasttScan ? 2 : 10)    };    var tcpClIEntASyncResult = clIEnt.BeginConnect(ipAddress, portNo, asyncResult =>    {        portopen = false;        try        {            clIEnt.EndConnect(asyncResult);            portopen = true;        }        catch (SocketException)        {        }        catch (NullReferenceException)        {        }        catch (ObjectdisposedException)        {        }        catch (Exception ex)        {            Console.Writeline(ex.Message); // ? unkNown socket failure ?        }        if (portopen)            Console.Writeline($"{ipAddress}:{portNo}:{portopen}");        clIEnt.dispose();        clIEnt = null;    }, null);    tcpClIEntASyncResult.AsyncWaitHandle.WaitOne();}

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