public DateTime Now(string timeServer)
{
try
{
SntpMessage requestMessage = new SntpMessage();
SntpMessage responseMessage = new SntpMessage();
if (!StringUtility.IsNullOrEmpty(timeServer))
{
// Resolve server address
IPHostEntry timeHost = Dns.GetHostEntry(timeServer);
IPEndPoint remoteEndPoint = new IPEndPoint(timeHost.AddressList[0], Constants.SNTP_CLIENT_PORT);
responseMessage = SendRequest(requestMessage, remoteEndPoint);
}
else
{
responseMessage = SendRequest(requestMessage);
}
return(responseMessage.TransmitDateTime);
}
catch
{
return(DateTime.MinValue);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="TimeChangedEventArgs" /> class.
/// </summary>
/// <param name="message">Response Message.</param>
public TimeChangedEventArgs(SntpMessage message)
{
this.ResponseMessage = message;
this.DeviceTime = DateTime.Now.ToUniversalTime();
this.NetworkTime = message.TransmitDateTime;
this.ClockOffset = message.LocalClockOffset;
//Debug.Print(TimeZone.CurrentTimeZone.GetUtcOffset(responseMessage.TransmitDateTime).ToString());
//Debug.Print(TimeZone.CurrentTimeZone.GetUtcOffset(this.NetworkTime).ToString());
Utility.SetLocalTime(message.TransmitDateTime.AddHours(-8));
Logger.WriteInfo(this, "Device time changed from " + this.DeviceTime.ToString() + " to " + DateTime.Now.ToString() + " using network time");
}
private void Synchronize(object state)
{
SntpMessage requestMessage = new SntpMessage();
SntpMessage responseMessage = new SntpMessage();
responseMessage = SendRequest(requestMessage);
if (responseMessage != null)
{
TimeChangedEventArgs args = new TimeChangedEventArgs(responseMessage);
this.OnTimeChanged(args);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="TimeChangedEventArgs" /> class.
/// </summary>
/// <param name="message">Response Message.</param>
public TimeChangedEventArgs(SntpMessage message)
{
this.ResponseMessage = message;
this.DeviceTime = DateTime.Now.ToUniversalTime();
this.NetworkTime = message.TransmitDateTime;
this.ClockOffset = message.LocalClockOffset;
//Debug.Print(TimeZone.CurrentTimeZone.GetUtcOffset(responseMessage.TransmitDateTime).ToString());
//Debug.Print(TimeZone.CurrentTimeZone.GetUtcOffset(this.NetworkTime).ToString());
Utility.SetLocalTime(message.TransmitDateTime.AddHours(-8));
Logger.WriteInfo(this, "Device time changed from " + this.DeviceTime.ToString() + " to " + DateTime.Now.ToString() + " using network time");
}
public SntpMessage SendRequest(SntpMessage sentMessage, IPEndPoint remoteEndPoint)
{
try
{
using (Socket _socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp))
{
if (remoteEndPoint == null)
{
try
{
IPHostEntry timeHost = Dns.GetHostEntry(_primaryServer);
remoteEndPoint = new IPEndPoint(timeHost.AddressList[0], Constants.SNTP_CLIENT_PORT);
_socket.Connect(remoteEndPoint);
}
catch
{
Logger.WriteInfo(this, "Failed to contact primary server " + _primaryServer + " failed. Trying again using alternate server " + _alternateServer
+ " endpoint " + remoteEndPoint.ToString());
IPHostEntry timeHost = Dns.GetHostEntry(_alternateServer);
remoteEndPoint = new IPEndPoint(timeHost.AddressList[0], Constants.SNTP_CLIENT_PORT);
_socket.Connect(remoteEndPoint);
}
}
try
{
_socket.Connect(remoteEndPoint);
}
catch
{
Logger.WriteInfo(this, "Failed to contact primary server " + _primaryServer + " failed. Trying again using alternate server " + _alternateServer
+ " endpoint " + remoteEndPoint.ToString());
}
if (remoteEndPoint != null)
{
Byte[] messageBuffer = new Byte[Constants.SNTP_MAX_MESSAGE_SIZE];
_socket.ReceiveTimeout = Constants.SNTP_RECEIVE_TIMEOUT;
_socket.SendTimeout = Constants.SNTP_SEND_TIMEOUT;
// send message
_socket.SendTo(sentMessage.ToArray(), remoteEndPoint);
Logger.WriteDebug(this, "PACKET was "
+ " successfully sent to client endpoint " +
remoteEndPoint.ToString());
Logger.WriteDebug(sentMessage.ToString());
// receive message
_socket.Receive(messageBuffer);
_socket.Close();
SntpMessage recivedMessage = new SntpMessage(messageBuffer);
Logger.WriteDebug(this, "PACKET was successfully received from client endpoint " +
remoteEndPoint.ToString());
Logger.WriteDebug(recivedMessage.ToString());
return(recivedMessage);
}
}
}
catch (SocketException ex)
{
Logger.WriteError(this, ex.Message + "Socket Error Code: " + ex.ErrorCode.ToString(), ex);
}
catch (Exception ex)
{
Logger.WriteError(this, "Error Message:" + ex.Message.ToString(), ex);
}
return(null);
}
public SntpMessage SendRequest(SntpMessage sentMessage)
{
return(this.SendRequest(sentMessage, null));
}
