public static NtpResponse ParseBytes(byte[] bytes)
{
if (bytes.Length != 48)
{
return(null);
}
var response = new NtpResponse();
response.TransmitTimestampUtc = response.GetDateTime(bytes, TransmitTimestampOffset);
response.ReceiveTimestampUtc = response.GetDateTime(bytes, ReceiveTimestampOffset);
response.OriginateTimestampUtc = response.GetDateTime(bytes, OriginateTimestampOffset);
response.ReferenceTimestampUtc = response.GetDateTime(bytes, ReferenceTimestampOffset);
response.RootDispersion = BitConverter.ToInt32(new byte[] { bytes[8], bytes[9], bytes[10], bytes[11] }, 0);
response.RootDelay = BitConverter.ToInt32(new byte[] { bytes[4], bytes[5], bytes[6], bytes[7] }, 0);
response.PrecisionLog2Seconds = Convert.ToInt32(bytes[3]);
response.PrecisionLog2Seconds = Convert.ToInt32(bytes[2]);
response.Stratum = response.GetStratum(bytes[1]);
response.ReferenceIdentifier = response.GetReferenceIdentifier(response.Stratum, new byte[] { bytes[12], bytes[13], bytes[14], bytes[15] });
response.LeapIndicator = response.GetLeapIndictator(bytes[0]);
response.VersionNumber = response.GetVersionNumber(bytes[0]);
response.Mode = response.GetMode(bytes[0]);
return(response);
}
public byte[] GetOriginateTimestamp()
{
var time = OriginateTimestampUtc;
var totalTicks = (time - Base).Ticks;
var totalSeconds = (uint)(totalTicks / 10000000);
var leftOverPicoseconds = (uint)(((totalTicks % 10000000) * 100000) / 232);
totalSeconds = NtpResponse.SwapEndianness(totalSeconds);
leftOverPicoseconds = NtpResponse.SwapEndianness(leftOverPicoseconds);
var result = new byte[8];
BitConverter.GetBytes(totalSeconds).CopyTo(result, 0);
BitConverter.GetBytes(leftOverPicoseconds).CopyTo(result, 4);
return(result);
}