static void Main(string[] args)
{
// query the SNTP server
NtpPacket response;
using (var ntp = new NtpClient(Dns.GetHostAddresses("pool.ntp.org")[0]))
response = ntp.Query();
// offset = ntp.GetCorrectionOffset();
Console.WriteLine(response.CorrectionOffset);
}
/// <summary>
/// Gets the time from the server as needed, based on cache expiration
/// </summary>
/// <returns></returns>
protected override long GetUnixTime()
{
if (!TimeExpired()) return (long) (DateTime.UtcNow - UnixEpoch).TotalMilliseconds + _millisecondsDifference;
lock (_getTime)
{
if (!TimeExpired())
return (long) (DateTime.UtcNow - UnixEpoch).TotalMilliseconds + _millisecondsDifference;
using (var ntp = new NtpClient(_configuration.Server, _configuration.Port))
{
ntp.Timeout = _configuration.TimeOut;
var ntpResponse = ntp.Query();
_millisecondsDifference = (long)ntpResponse.CorrectionOffset.TotalMilliseconds;
}
ServerOffsetObtained = DateTime.UtcNow;
}
return (long)(DateTime.UtcNow - UnixEpoch).TotalMilliseconds + _millisecondsDifference;
}
static void Main(string[] args)
{
var servers = args.Length > 0 ? args : new[] { "pool.ntp.org" };
foreach (var host in servers)
{
Console.WriteLine("Querying {0}...", host);
try
{
using (var ntp = new NtpClient(Dns.GetHostAddresses(host)[0]))
{
var packet = ntp.Query();
Console.WriteLine();
Console.WriteLine("Received {0}B packet", packet.Bytes.Length);
Console.WriteLine("-------------------------------------");
Console.WriteLine("Correction offset: {0:s'.'FFFFFFF}", packet.CorrectionOffset);
Console.WriteLine("Round-trip time: {0:s'.'FFFFFFF}", packet.RoundTripTime);
Console.WriteLine("Origin time: {0:hh:mm:ss.fff}", packet.OriginTimestamp);
Console.WriteLine("Receive time: {0:hh:mm:ss.fff}", packet.ReceiveTimestamp);
Console.WriteLine("Transmit time: {0:hh:mm:ss.fff}", packet.TransmitTimestamp);
Console.WriteLine("Destination time: {0:hh:mm:ss.fff}", packet.DestinationTimestamp);
Console.WriteLine("Protocol version: {0}", packet.VersionNumber);
Console.WriteLine("Protocol mode: {0}", packet.Mode);
Console.WriteLine("Leap second: {0}", packet.LeapIndicator);
Console.WriteLine("Stratum: {0}", packet.Stratum);
Console.WriteLine("Reference ID: 0x{0:x}", packet.ReferenceId);
Console.WriteLine("Reference time: {0:hh:mm:ss.fff}", packet.ReferenceTimestamp);
Console.WriteLine("Root delay: {0}ms", packet.RootDelay.TotalMilliseconds);
Console.WriteLine("Root dispersion: {0}ms", packet.RootDispersion.TotalMilliseconds);
Console.WriteLine("Poll interval: 2^{0}s", packet.Poll);
Console.WriteLine("Precision: 2^{0}s", packet.Precision);
Console.WriteLine();
}
}
catch (Exception ex)
{
Console.WriteLine();
Console.WriteLine("NTP query failed: {0}", ex.Message);
}
}
}
/// <summary>
/// Retrieve the current time from a NTP service
/// </summary>
public DateTime retrieveCurrentTime()
{
//setTime("10:10");
//setDate("01.02.2017");
this.Log("Start retrieving time");
// perform only one query to get the offset
TimeSpan offset;
using (var ntp = new NtpClient(Settings.Default.NTP_Server))
{
ntp.Timeout = TimeSpan.FromSeconds(5);
var ntpResponse = ntp.Query();
offset = ntpResponse.CorrectionOffset;
}
//add UTC offset to achive the locat time
var UTC_offset = new TimeSpan(Settings.Default.UTC_Offset, 0, 0);
// use the offset throughout your app
return(DateTime.UtcNow + offset + UTC_offset);
}
/// <summary>
/// Gets the time from the server as needed, based on cache expiration
/// </summary>
/// <returns></returns>
protected override long GetUnixTime()
{
if (!TimeExpired())
{
return((long)(DateTime.UtcNow - UnixEpoch).TotalMilliseconds + _millisecondsDifference);
}
lock (_getTime)
{
if (!TimeExpired())
{
return((long)(DateTime.UtcNow - UnixEpoch).TotalMilliseconds + _millisecondsDifference);
}
using (var ntp = new NtpClient(_configuration.Server, _configuration.Port))
{
ntp.Timeout = _configuration.TimeOut;
var ntpResponse = ntp.Query();
_millisecondsDifference = (long)ntpResponse.CorrectionOffset.TotalMilliseconds;
}
ServerOffsetObtained = DateTime.UtcNow;
}
return((long)(DateTime.UtcNow - UnixEpoch).TotalMilliseconds + _millisecondsDifference);
}