NTP impossible

Dylan · June 25, 2012, 4:36pm

hello !

i have some problem with NTP …

i use this code

public static bool NTPTime(string TimeServer, int GmtOffset)
        {
            Socket s = null;
            try
            {
                EndPoint rep = new IPEndPoint(Dns.GetHostEntry(TimeServer).AddressList[0], 123);
                s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                byte[] ntpData = new byte[48];
                Array.Clear(ntpData, 0, 48);
                ntpData[0] = 0x1B; // Set protocol version
                s.SendTo(ntpData, rep); // Send Request   
                if (s.Poll(30 * 1000 * 1000, SelectMode.SelectRead)) // Waiting an answer for 30s, if nothing: timeout
                {
                    s.ReceiveFrom(ntpData, ref rep); // Receive Time
                    byte offsetTransmitTime = 40;
                    ulong intpart = 0;
                    ulong fractpart = 0;
                    for (int i = 0; i <= 3; i++) intpart = (intpart << 8 ) | ntpData[offsetTransmitTime + i];
                    for (int i = 4; i <= 7; i++) fractpart = (fractpart << 8 ) | ntpData[offsetTransmitTime + i];
                    ulong milliseconds = (intpart * 1000 + (fractpart * 1000) / 0x100000000L);
                    s.Close();
                    DateTime dateTime = new DateTime(1900, 1, 1) + TimeSpan.FromTicks((long)milliseconds * TimeSpan.TicksPerMillisecond);
                    Utility.SetLocalTime(dateTime.AddMinutes(GmtOffset));
                    RealTimeClock.SetTime(DateTime.Now);
                    return true;
                }
                s.Close();
            }
            catch
            {
                try { s.Close(); }
                catch { }
            }
            return false;
        }

and i call it like this

NTPTime("193.49.146.254", +2);

i try with the ip of my computer but it still dosen’t work …

the fez panda is directly connect to the internet.

i had this to try but it dosen’t fix it

WIZnet_W5100.Enable(SPI.SPI_module.SPI1, (Cpu.Pin)FEZ_Pin.Digital.Di10, (Cpu.Pin)FEZ_Pin.Digital.Di7, true);
            NetworkInterface.EnableStaticIP(ip, subnet, gateway, mac);

thank you !! ( and sorry for the mistake i’m french )

mhectorgato · June 25, 2012, 4:54pm

What exception message are you getting from the code? Are you able to compile the code?

Are you able to connect to other servers on the internet with your device?

I’m using very similar code with no problems.

For the server I used: time.nist.gov (NIST Internet Time Service)

Dylan · June 25, 2012, 5:06pm

i have no execption, and all my code compile …

it dosen’t work with your adress.

Maybe you can show me the code you use ?

thank for help !

mhectorgato · June 25, 2012, 5:21pm

Are you sure you’re connected to the internet ok?

But here’s part of the code I put into Codeshare. My module calls DoTimeUpdate() - That first tries the primary site, and then if it fails, it tries a differently one directly.

My code will probably not compile, due my Status property - which comes from the full code on Codeshare.

http://www.tinyclr.com/codeshare/entry/453


DateTime NTPTime(string TimeServer)
        {
            // borrowed (and slightly modified) from Nicolas3 
            // http://www.tinyclr.com/codeshare/entry/244
            Socket s = null;
            try
            {
                EndPoint rep = new IPEndPoint(Dns.GetHostEntry(TimeServer).AddressList[0], 123);
                s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
                byte[] ntpData = new byte[48];
                Array.Clear(ntpData, 0, 48);
                ntpData[0] = 0x1B; // Set protocol version
                s.SendTo(ntpData, rep); // Send Request   
 
                if (s.Poll(10 * 1000 * 1000, SelectMode.SelectRead)) // Waiting an answer for 10s, if nothing: timeout
                {
                    s.ReceiveFrom(ntpData, ref rep); // Receive Time
                    byte offsetTransmitTime = 40;
                    ulong intpart = 0;
                    ulong fractpart = 0;
                    for (int i = 0; i <= 3; i++) intpart = (intpart << 8) | ntpData[offsetTransmitTime + i];
                    for (int i = 4; i <= 7; i++) fractpart = (fractpart << 8) | ntpData[offsetTransmitTime + i];
                    ulong milliseconds = (intpart * 1000 + (fractpart * 1000) / 0x100000000L);
                    s.Close();
                    DateTime dateTime = new DateTime(1900, 1, 1) + TimeSpan.FromTicks((long)milliseconds * TimeSpan.TicksPerMillisecond);
                    return dateTime;
                }
                s.Close();
            }
            catch (Exception e)
            {
                try { s.Close(); }
                catch { }
            }
            return DateTime.MinValue;
        }
        /// <summary>
        /// Go and get the time from NIST
        /// </summary>
        public void DoTimeUpdate()
        {
            if (!timeUpdated)
            {
                Status = WiFiStatus.GettingTime;
 
                DateTime dt;
 
                try
                {
                    // try the official site
                    dt = NTPTime("time.nist.gov");
                    timeUpdated = true;
                }
                catch (Exception ex)
                {
                    string s = ex.Message;
                    dt = DateTime.MinValue;
                }
 
                try
                {
                    // if the official site didn't work, then try a specific site
                    if (dt == DateTime.MinValue)
                    {
                        timeUpdated = true;
                        dt = NTPTime("nist1-ny.ustiming.org");
                    }
                }
                catch (Exception ex)
                {
                    string s = ex.Message;
                    dt = DateTime.MinValue;
                }
 
                if (timeUpdated && dt != DateTime.MinValue)
                {
                    // update the system clock with adjusted value
                    Utility.SetLocalTime(dt.AddHours(TimezoneOffset));
 
                    if (timeUpdated && TimeUpdated != null)
                    {
                        TimeUpdated(null, new TimeUpdatedArgs(dt));
                    }
                }
 
                Status = WiFiStatus.Connected;
            }
        }
    }

Dylan · June 25, 2012, 5:31pm

thank a lot for your code !!!

i will try this now.

How can i check that my FEZ PANDA is connect to internet ?

thank again to help me ! ( in a way you same my life because it’s for school ^^)

mhectorgato · June 25, 2012, 5:35pm

I would try to request a web page - like “www.google.com” – using the HttpWebRequest object.

BTW - I added a note about my code maybe not compiling for - the Status property in the DoTimeUpdate() method.

Dylan · June 25, 2012, 5:49pm

timeUpdated Status TimezoneOffset and WifiStatue dosen’t exit in my code, what i have miss ?

And i don’t know how use HttpWebRequest ( shame on me )

thanks !!

[edit] i try to ping the FEZ from my computer and it’s work ( the FEZ is connect by ethernet directly on my router and my pc use WIFI )

[edit 2] sorry i miss your codeshare, now i understand why they dosen’t exist ^^. but i think your program will impossible to add in my :s

mhectorgato · June 25, 2012, 5:56pm

Those are properties in my class. The only one you need to recreate is the TimeZoneOffset (hour difference from UTC). Just create a local variable with that name and make it an int .

The other lines can be removed.

Something like this:
taken from (from http://www.tinyclr.com/codeshare/entry/126)


HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("www.google.com");
// Get a response from the server.
            WebResponse resp = null;
 
            try
            {
                resp = request.GetResponse();
            }
            catch (Exception e)
            {
                Debug.Print("Exception in HttpWebRequest.GetResponse(): " +
                    e.ToString());
                throw e;
            }

Dylan · June 25, 2012, 6:19pm

mhectorgato:

Dylan:

timeUpdated Status TimezoneOffset and WifiStatue dosen’t exit in my code, what i have miss ?

And i don’t know how use HttpWebRequest ( shame on me )

thank

Those are properties in my class. The only one you need to recreate is the TimeZoneOffset (hour difference from UTC). Just create a local variable with that name and make it an int .

The other lines can be removed.

Something like this:
taken from (from http://www.tinyclr.com/codeshare/entry/126)
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("www.google.com");
// Get a response from the server.
            WebResponse resp = null;
 
            try
            {
                resp = request.GetResponse();
            }
            catch (Exception e)
            {
                Debug.Print("Exception in HttpWebRequest.GetResponse(): " +
                    e.ToString());
                throw e;
            }

i try your code but it don’t work. i have an execption on this line

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("www.google.com");

the exeption is =>

System.ArgumentException

in

GHIElectronics.NETMF.W5100.Http.dll

mhectorgato · June 25, 2012, 6:37pm

I’m not in front of my computer so it’s hard to help - perhaps its the missing http:// in the address??

Dylan · June 25, 2012, 6:37pm

ho it was just a problem with the URL of google ^^ ( just add http://)

but it’s dosen’t work i get this exception ( because it go to the catch) = >

Exception in HttpWebRequest.GetResponse(): GHIElectronics.NETMF.Net.WebException

Dylan · June 25, 2012, 6:38pm

faster than me ^^

mhectorgato · June 25, 2012, 6:43pm

Dylan:

ho it was just a problem with the URL of google ^^ ( just add http://)

but it’s dosen’t work i get this exception ( because it go to the catch) = >
Exception in HttpWebRequest.GetResponse(): GHIElectronics.NETMF.Net.WebException

Maybe put a breakpoint in the catch and look at the exception message itself??

Dylan · June 25, 2012, 6:51pm

#### Exception GHIElectronics.NETMF.Net.WebException - 0x00000000 (1) ####
    #### Message: 
    #### GHIElectronics.NETMF.Net.HttpWebRequest::GetResponse [IP: 00d3] ####
    #### MFConsoleApplication1.Program::Main [IP: 003d] ####

i got this.

[edit] and before i get this =>

#### Exception System.Exception - 0x00000000 (1) ####
    #### Message: DNS server IP address was not found.
    #### GHIElectronics.NETMF.Net.Dns::GetHostEntry [IP: 0038] ####
    #### GHIElectronics.NETMF.Net.HttpWebRequest::EstablishConnection [IP: 00e1] ####
    #### GHIElectronics.NETMF.Net.HttpWebRequest::SubmitRequest [IP: 0013] ####
    #### GHIElectronics.NETMF.Net.HttpWebRequest::GetResponse [IP: 000c] ####
    #### MFConsoleApplication1.Program::Main [IP: 003d] ####

what the problem with DNS ??

Brett · June 25, 2012, 7:15pm

Your problem with DNS is that you probably don’t have it set correctly - one of two situations come to mind, first that you have a typo in the address and DNS fails to talk to the DNS host, or secondly that you’ve just not set up DNS. Please show us the code where you set your fixed IP address up?

Brett · June 25, 2012, 7:21pm

If you enable Static IP you also need this:

NetworkInterface.EnableStaticDns(dnsAddress);

Dylan · June 25, 2012, 7:44pm

thanks for help !!
.
now i have this problem …

 #### Exception System.NullReferenceException - CLR_E_NULL_REFERENCE (1) ####
    #### Message: 
    #### GHIElectronics.NETMF.Net.HttpWebRequest::EstablishConnection [IP: 00f7] ####
    #### GHIElectronics.NETMF.Net.HttpWebRequest::SubmitRequest [IP: 0013] ####
    #### GHIElectronics.NETMF.Net.HttpWebRequest::GetResponse [IP: 000c] ####
    #### MFConsoleApplication1.Program::Main [IP: 0061] ####
    #### Exception GHIElectronics.NETMF.Net.WebException - 0x00000000 (1) ####
    #### Message: 
    #### GHIElectronics.NETMF.Net.HttpWebRequest::GetResponse [IP: 00d3] ####
    #### MFConsoleApplication1.Program::Main [IP: 0061] ####

mhectorgato · June 25, 2012, 7:48pm

Don’t forget to set the DNS as well - 8.8.8.8 is a good ip to use for DNS. You’ll need to use a gateway as well.

Dylan are you using DHCP? Or Static IP?

Brett · June 25, 2012, 7:53pm

Personally, I suggest you just go back to doing NTP and ignoring HTTP at this stage. All you want is your network time code to sync the time, right? Get that working and then worry about other stuff. HTTP is more complex and isn’t adding anything to your current goal. I think we’ve established that your code didn’t do DNS right, so now we should figure out what is next.

mhectorgato · June 25, 2012, 8:02pm

I was just trying to establish that he had a connection to the internet.