在工作中,我必須路由一些使用UDP進入的數據。我已經學習了一些教程,如this blog或this tutorial,並製作了兩個控制檯應用程序,一個發送UDP消息(客戶端),另一個讀取它們(監聽器)。 當我輸入IP地址127.0.0.1(本地主機)一切順利,但沒有其他地址的作品。如果我使用我真正的本地IP地址,我沒有運氣。由於我本地沒有靜態IP,我也嘗試在有靜態IP的服務器上安裝偵聽器。爲此,我已經確保將規則添加到Windows防火牆入站規則集。仍然沒有運氣。有任何想法嗎?這裏是我的代碼:UDP到服務器不起作用
/西蒙/
客戶
class Client
{
private readonly Socket _sendingSocket;
private readonly IPEndPoint _receiverEndpoint;
private static int outboundPortNumber = int.Parse(ConfigurationManager.AppSettings["OutgoingPortNumber"]);
public Client()
{
var receiverAddress = IPAddress.Parse(ConfigurationManager.AppSettings["IpOfReceiver"]);
_receiverEndpoint = new IPEndPoint(receiverAddress, outboundPortNumber);
_sendingSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
_sendingSocket.EnableBroadcast = true;
}
public void Transmit()
{
bool done = false;
while (!done)
{
Console.WriteLine("Hit q to quit");
var keypress = Console.ReadKey();
if (keypress.KeyChar.ToString().ToLower() == "q")
done = true;
else
SendTextToServer();
}
}
private void SendTextToServer()
{
Console.WriteLine("Enter text to send");
var textToSend = Console.ReadLine();
byte[] send_buffer = Encoding.ASCII.GetBytes(textToSend);
try
{
_sendingSocket.SendTo(send_buffer, _receiverEndpoint);
}
catch (Exception send_exception)
{
Console.WriteLine(" Exception {0}", send_exception.Message);
}
}
}
監聽
class Listener
{
private bool _started;
private ManualResetEvent _stop;
private UdpClient _client;
private IPEndPoint _endPoint;
private Thread _workingThread;
private static int inboundPortNumber = int.Parse(ConfigurationManager.AppSettings["IncomingPortNumber"]);
public void Start()
{
_started = true;
_stop = new ManualResetEvent(false);
InitializeUdpClient();
InitializeWorkingThread();
}
private void InitializeUdpClient()
{
_endPoint = new IPEndPoint(IPAddress.Any, inboundPortNumber);
_client = new UdpClient(_endPoint);
}
private void InitializeWorkingThread()
{
_workingThread = new Thread(WorkerFunction);
_workingThread.Name = "WorkingThread";
_workingThread.Start();
}
private void WorkerFunction()
{
while (_started)
{
var res = _client.BeginReceive(iar =>
{
if (iar.IsCompleted)
{
byte[] receivedBytes = _client.EndReceive(iar, ref _endPoint);
OutputToConsole(receivedBytes);
}
}, null);
if (WaitHandle.WaitAny(new[] { _stop, res.AsyncWaitHandle }) == 0)
{
break;
}
}
}
private void OutputToConsole(byte[] receivedBytes)
{
string receivedPacket = Encoding.ASCII.GetString(receivedBytes);
Console.WriteLine("{0} received at {1}", receivedPacket, DateTime.Now.ToString("hhMMss.ffff"));
}
}
- 編輯 -
一個意見的建議我應該看看一些日誌。使用Microsoft網絡監視器來捕獲我的數據流量,我已經嘗試了以下內容: (1)在開發機器上:從我的開發機器發送到127.0.0.1(從localhost到localhost)時,沒有數據被記錄。我發現這很奇怪,因爲這是收到消息並很好地打印到控制檯的唯一場景。 (2)當我從我的開發機器發送到服務器時,在我的開發機器上有一些出站數據被捕獲,並且在服務器上也有輸入數據。我在服務器上運行了netstat -b,它根本沒有顯示任何UDP協議。由於在方法InitializeUdpClient()中,UdpClient使用IPEndpoint,所以我應該綁定到端口。那爲什麼當我運行netstat時不顯示呢?基於這個新的信息,建議爲什麼聽衆沒有收到任何數據?
/simon/
您的疑難解答數據包捕獲是什麼樣的? – admdrew
您的錯誤報告只包含「不起作用」或「沒有運氣」等短語。怎麼了?你有錯誤嗎?套接字是否被創建? –