private void WatchClients()
{
while (Listen)
{
Thread.Sleep(new TimeSpan(0, 1, 0)); //check the servers every 1 minute
ConnectedClients.AsParallel().ForAll(o => {
try {
if (o.TcpClient?.Client != null && o.TcpClient.Client.Connected)
{
/* pear to the documentation on Poll:
* When passing SelectMode.SelectRead as a parameter to the Poll method it will return
* -either- true if Socket.Listen(Int32) has been called and a connection is pending;
* -or- true if data is available for reading;
* -or- true if the connection has been closed, reset, or terminated;
* otherwise, returns false
*/
// Detect if client disconnected
if (o.TcpClient.Client.Poll(0, SelectMode.SelectRead))
{
byte[] buff = new byte[1];
if (o.TcpClient.Client.Receive(buff, SocketFlags.Peek) == 0)
{
// Client disconnected
ConnectedClients.Remove(o);
o.TcpClient.Close();
}
}
}
else
{
ConnectedClients.Remove(o);
o.TcpClient?.Close();
}
}
catch {
ConnectedClients.Remove(o);
o.TcpClient?.Close();
}
});
Thread.Sleep(16);
}
}