我使用以下代码来实现此目标:
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();
}
}下面是我对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.
}
}
}问题是这段代码可以在我的开发环境中工作,但当我将它移到生产环境中时,它总是超时(无论我将超时间隔设置为5秒还是20秒)。
是否有其他方法可以检查该IP是否在该特定端口上进行主动侦听?
为什么我不能在我的托管环境中做到这一点?
发布于 2011-09-11 02:02:58
您可以从命令行运行netstat -na来查看所有(包括侦听)端口。
如果添加-b,您还将看到链接到每个连接/侦听的可执行文件。
在.NET中,您可以使用System.Net.NetworkInformation.IPGlobalProperties.GetIPGlobalProperties().GetActiveTcpListeners()获取所有侦听连接
发布于 2011-09-16 17:54:02
您可以使用以下代码进行检查:
TcpClient tc = new TcpClient();
try
{
tc.Connect(<server ipaddress>, <port number>);
bool stat = tc.Connected;
if (stat)
MessageBox.Show("Connectivity to server available.");
tc.Close();
}
catch(Exception ex)
{
MessageBox.Show("Not able to connect : " + ex.Message);
tc.Close();
}https://stackoverflow.com/questions/7373537
复制相似问题