public static List <string> GetCurrentConnectedServerInfo()
{
try
{
List <string> info = new List <string>();
NtpResponse response = connectedNtpServer.GetTime();
NtpPacket packet = response.Packet;
string l1, l2, s1, s2;
l1 = packet.OriginateTimestamp.ToString() + ":" + packet.OriginateTimestamp.Microsecond.ToString();
l2 = packet.DestinationTimestamp.ToUniversalTime().ToString() + ":" + packet.OriginateTimestamp.Microsecond.ToString();
s1 = packet.ReceiveTimestamp.ToUniversalTime().ToLongTimeString() + ":" + packet.ReceiveTimestamp.Microsecond;
s2 = packet.TransmitTimestamp.ToUniversalTime().ToLongTimeString() + ":" + packet.TransmitTimestamp.Microsecond;
info.Add($"Request sent at: {l1} UTC" +
$" and received response at {l2} UTC");
info.Add($"Currently connected server ({ServerChooser.FinalServerAddress}) has stratum {packet.Stratum} and runs NTP version {packet.VersionNumber.ToString()}");
info.Add($"Choosed server received our request at {s1} UTC and sent response at {s2} UTC");
return(info);
}
catch (Exception ex)
{
MessageBox.Show("An error has occurred, please try to connect again!\n" +
"Error message: " + ex.Message);
return(new List <string>());
}
}
public static string RetrieveSynchronizationInfo()
{
try
{
NtpResponse response = NtpConnector.connectedNtpServer.GetTime();
return($"Moved local time by {response.TimeOffset.ToTimeSpan()}");
}catch (Exception ex)
{
return("Click Synchronize to see more details!");
}
}
static void Main(string[] args)
{
//var udpClient = new UdpClient("ntp1.gatech.edu", 123);
//var ipEndpoint = new IPEndPoint(IPAddress.Parse("130.207.165.28"), 123);
//var reqBytes = Encoding.ASCII.GetBytes("Anybody there?");
//udpClient.Send(reqBytes, reqBytes.Length);
//udpClient.Connect(ipEndpoint);
//udpClient.Send(System.Text.Encoding.ASCII.GetBytes(""), 0, ipEndpoint);
//var received = udpClient.Receive(ref ipEndpoint);
//var rcvString = Convert.ToString(received);
var req = new NtpRequest()
{
LeapIndicator = LeapIndicator.NoLeapSecondAdjustment,
Mode = Mode.Client,
Stratum = Stratum.PrimaryServer,
VersionNumber = 3,
OriginateTimestampUtc = DateTime.UtcNow
};
var bytes = req.GetBytes();
//const string ntpServer = "ntp2.gatech.edu";
const string ntpServer = "time.windows.com";
var addresses = Dns.GetHostEntry(ntpServer).AddressList;
//The UDP port number assigned to NTP is 123
var ipEndPoint = new IPEndPoint(addresses[0], 123);
//NTP uses UDP
var sw = new Stopwatch();
sw.Start();
using (var socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))
{
socket.Connect(ipEndPoint);
//Stops code hang if NTP is blocked
socket.ReceiveTimeout = 3000;
socket.Send(bytes);
socket.Receive(bytes);
socket.Close();
}
sw.Stop();
var elapsed = sw.ElapsedMilliseconds;
var response = NtpResponse.ParseBytes(bytes);
}
