我使用以下代码来实现这个目标:
public static bool IsServerListening()
{
var endpoint = new IPEndPoint(IPAddress.Parse("201.212.1.167"), 2593);
var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
socket.Connect(endpoint, TimeSpan.FromSeconds(5));
return true;
}
catch (SocketException exception)
{
if (exception.SocketErrorCode == SocketError.TimedOut)
{
Logging.Log.Warn("Timeout while connecting to UO server game port.", exception);
}
else
{
Logging.Log.Error("Exception while connecting to UO server game port.", exception);
}
return false;
}
catch (Exception exception)
{
Logging.Log.Error("Exception while connecting to UO server game port.", exception);
return false;
}
finally
{
socket.Close();
}
}
这是我对Socket
类的扩展方法:
public static class SocketExtensions
{
public const int CONNECTION_TIMEOUT_ERROR = 10060;
/// <summary>
/// Connects the specified socket.
/// </summary>
/// <param name="socket">The socket.</param>
/// <param name="endpoint">The IP endpoint.</param>
/// <param name="timeout">The connection timeout interval.</param>
public static void Connect(this Socket socket, EndPoint endpoint, TimeSpan timeout)
{
var result = socket.BeginConnect(endpoint, null, null);
bool success = result.AsyncWaitHandle.WaitOne(timeout, true);
if (!success)
{
socket.Close();
throw new SocketException(CONNECTION_TIMEOUT_ERROR); // Connection timed out.
}
}
}
这段代码在我的开发环境中可以正常工作,但当我将其移到生产环境中时,它总是超时(无论我将超时间隔设置为5或20秒)。
是否有其他方法可以检查该IP地址是否正在特定端口上进行监听?
为什么我不能从我的托管环境中执行此操作的原因是什么?
System.Net.IPAddress.Any
是更好的解决方案,它可以监听所有IP地址(如果这是可接受的)。 - Matej