// Internal Methods
/// <summary>
/// A SNTPData that is used by a client to send to a server to request data.
/// </summary>
internal static SNTPData GetClientRequestPacket(VersionNumber versionNumber)
{
SNTPData packet = new SNTPData();
packet.Mode = Mode.Client;
packet.VersionNumber = versionNumber;
packet.TransmitDateTime = DateTime.Now.ToUniversalTime();
return(packet);
}
/// <summary>
/// This is the 'nuts and bolts' method that queries the server.
/// </summary>
/// <returns>A QueryServerResults instance that holds the results of the query.</returns>
private QueryServerCompletedEventArgs QueryServer()
{
QueryServerCompletedEventArgs result = new QueryServerCompletedEventArgs();
Initialize();
using (UdpClient client = new UdpClient())
{
try
{
// Configure and connect the socket.
IPEndPoint ipEndPoint = RemoteSNTPServer.GetIPEndPoint();
client.Client.SendTimeout = (int)this.Timeout.TotalMilliseconds;
client.Client.ReceiveTimeout = (int)this.Timeout.TotalMilliseconds;
client.Connect(ipEndPoint);
// Send and receive the data, and save the completion DateTime.
SNTPData request = SNTPData.GetClientRequestPacket(this.VersionNumber);
client.Send(request, request.Length);
result.Data = client.Receive(ref ipEndPoint);
result.Data.DestinationDateTime = DateTime.Now.ToUniversalTime();
// Check the data
if (result.Data.Mode == Mode.Server)
{
result.Succeeded = true;
// Call other method(s) if needed
if (this.UpdateLocalDateTime)
{
this.UpdateTime(result.Data.LocalClockOffset);
result.LocalDateTimeUpdated = true;
}
}
else
{
result.ErrorData = new ErrorData("The response from the server was invalid.");
}
return(result);
}
catch (Exception ex)
{
result.ErrorData = new ErrorData(ex);
return(result);
}
}
}
