Ntp client does not work! urgent!

**wysota** · 31st March 2010, 23:28

Oh... an "urgent" thread, lol

I have one question for you - why are you using QDataStream? Not that you actually send some data to it but you do realize no NTP server will know how to deserialize data serialized with QDataStream, right?

**ChrisW67** · 1st April 2010, 01:15

Just a quick test using netcat against my NTP server shows that the intent of AtomicClock::connectSuccsess(), which is sending a stream of 48 '0' characters to the server (did you mean NUL characters?), does not elicit a response. Perhaps you need to send a well-formed NTP request to the server?

I would suggest getting a hold of the NTP server code from ntp.org and looking at the source to the bundled ntpdate program.

**kknd** · 1st April 2010, 11:33

Hello,

to fatjuicymole, i know that i have just written that after i couldnt make work with this small code about 3 days, its just feeiling and wish..
second, i have checked the server with windows ntp client and few other free programs too, it works and the server address i use is a free organization server ntp.org. actually i used my code for other servers too so same problem occurs again.

to wysota, I dindnt think in that way, i try to write just a client program, i need to use QByteArray for time request. It is the same way the other codes do same jobb.. no way tried without datastream, and tried with connectToHost, write, read does not call readPendingDatagrams() anyway.

to ChrisW67, yeah i ment to send null characters with 48 length.

**faldzip** · 1st April 2010, 12:26

Originally Posted by kknd

Hello,
to ChrisW67, yeah i ment to send null characters with 48 length.

So 4 zeros or 4 null characters?

Qt Code:

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QChar zeroChar = '0';
QChar nullChar = '\0';

QChar zeroChar = '0';
QChar nullChar = '\0';

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**kknd** · 1st April 2010, 13:28

use of flush() makes no difference, i mean char '0', saw that in a c# example..

**wysota** · 1st April 2010, 17:14

Originally Posted by kknd

use of flush() makes no difference, i mean char '0', saw that in a c# example..

It would be nice if you actually checked what you were supposed to send instead of randomly trying your luck. Not very efficient...

**ChrisW67** · 2nd April 2010, 03:36

RFC 1305 Section 3 and Appendix A. The packet format is substantially more complex than an 48-byte block of zero bytes. This is a request and response on my machine.

Qt Code:

Switch view

Frame 1 (90 bytes on wire, 90 bytes captured)
Ethernet II, Src: 192.168.1.6 (00:1a:4d:70:61:9c), Dst: CameoCom_c1:3e:76 (00:40:f4:c1:3e:76)
Internet Protocol, Src: 192.168.1.6 (192.168.1.6), Dst: 192.168.1.1 (192.168.1.1)
User Datagram Protocol, Src Port: 53531 (53531), Dst Port: ntp (123)
Network Time Protocol
    Flags: 0xe3
        11.. .... = Leap Indicator: alarm condition (clock not synchronized) (3)
        ..10 0... = Version number: NTP Version 4 (4)
        .... .011 = Mode: client (3)
    Peer Clock Stratum: unspecified or unavailable (0)
    Peer Polling Interval: 4 (16 sec)
    Peer Clock Precision: 0.015625 sec
    Root Delay:    1.0000 sec
    Root Dispersion:    1.0000 sec
    Reference Clock ID: NULL
    Reference Clock Update Time: NULL
    Originate Time Stamp: NULL
    Receive Time Stamp: NULL
    Transmit Time Stamp: Apr  2, 2010 02:12:51.5572 UTC
 
0000  00 40 f4 c1 3e 76 00 1a 4d 70 61 9c 08 00 45 00   .@..>v..Mpa...E.
0010  00 4c 00 00 40 00 40 11 b7 49 c0 a8 01 06 c0 a8   .L..@.@..I......
0020  01 01 d1 1b 00 7b 00 38 83 a1 e3 00 04 fa 00 01   .....{.8........
0030  00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00   ................
0040  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0050  00 00 cf 5f d1 23 8e a1 83 72                     ..._.#...r
 
No.     Time        Source                Destination           Protocol Info
      2 0.000254    192.168.1.1           192.168.1.6           NTP      NTP server
 
Frame 2 (90 bytes on wire, 90 bytes captured)
Ethernet II, Src: CameoCom_c1:3e:76 (00:40:f4:c1:3e:76), Dst: 192.168.1.6 (00:1a:4d:70:61:9c)
Internet Protocol, Src: 192.168.1.1 (192.168.1.1), Dst: 192.168.1.6 (192.168.1.6)
User Datagram Protocol, Src Port: ntp (123), Dst Port: 53531 (53531)
Network Time Protocol
    Flags: 0x24
        00.. .... = Leap Indicator: no warning (0)
        ..10 0... = Version number: NTP Version 4 (4)
        .... .100 = Mode: server (4)
    Peer Clock Stratum: secondary reference (3)
    Peer Polling Interval: 4 (16 sec)
    Peer Clock Precision: 0.000001 sec
    Root Delay:    0.0388 sec
    Root Dispersion:    0.1307 sec
    Reference Clock ID: 192.231.203.132
    Reference Clock Update Time: Apr  2, 2010 02:05:40.4534 UTC
    Originate Time Stamp: Apr  2, 2010 02:12:51.5572 UTC
    Receive Time Stamp: Apr  2, 2010 02:12:51.5165 UTC
    Transmit Time Stamp: Apr  2, 2010 02:12:51.5165 UTC
 
0000  00 1a 4d 70 61 9c 00 40 f4 c1 3e 76 08 00 45 00   ..Mpa..@..>v..E.
0010  00 4c 00 00 40 00 40 11 b7 49 c0 a8 01 01 c0 a8   .L..@.@..I......
0020  01 06 00 7b d1 1b 00 38 82 6e 24 03 04 ec 00 00   ...{...8.n$.....
0030  09 ef 00 00 21 73 c0 e7 cb 84 cf 5f cf 74 74 10   ....!s....._.tt.
0040  e8 71 cf 5f d1 23 8e a1 83 72 cf 5f d1 23 84 38   .q._.#...r._.#.8
0050  8d a6 cf 5f d1 23 84 3b c2 52                     ..._.#.;.R

Frame 1 (90 bytes on wire, 90 bytes captured)
Ethernet II, Src: 192.168.1.6 (00:1a:4d:70:61:9c), Dst: CameoCom_c1:3e:76 (00:40:f4:c1:3e:76)
Internet Protocol, Src: 192.168.1.6 (192.168.1.6), Dst: 192.168.1.1 (192.168.1.1)
User Datagram Protocol, Src Port: 53531 (53531), Dst Port: ntp (123)
Network Time Protocol
    Flags: 0xe3
        11.. .... = Leap Indicator: alarm condition (clock not synchronized) (3)
        ..10 0... = Version number: NTP Version 4 (4)
        .... .011 = Mode: client (3)
    Peer Clock Stratum: unspecified or unavailable (0)
    Peer Polling Interval: 4 (16 sec)
    Peer Clock Precision: 0.015625 sec
    Root Delay:    1.0000 sec
    Root Dispersion:    1.0000 sec
    Reference Clock ID: NULL
    Reference Clock Update Time: NULL
    Originate Time Stamp: NULL
    Receive Time Stamp: NULL
    Transmit Time Stamp: Apr  2, 2010 02:12:51.5572 UTC

0000  00 40 f4 c1 3e 76 00 1a 4d 70 61 9c 08 00 45 00   .@..>v..Mpa...E.
0010  00 4c 00 00 40 00 40 11 b7 49 c0 a8 01 06 c0 a8   .L..@.@..I......
0020  01 01 d1 1b 00 7b 00 38 83 a1 e3 00 04 fa 00 01   .....{.8........
0030  00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00   ................
0040  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
0050  00 00 cf 5f d1 23 8e a1 83 72                     ..._.#...r

No.     Time        Source                Destination           Protocol Info
      2 0.000254    192.168.1.1           192.168.1.6           NTP      NTP server

Frame 2 (90 bytes on wire, 90 bytes captured)
Ethernet II, Src: CameoCom_c1:3e:76 (00:40:f4:c1:3e:76), Dst: 192.168.1.6 (00:1a:4d:70:61:9c)
Internet Protocol, Src: 192.168.1.1 (192.168.1.1), Dst: 192.168.1.6 (192.168.1.6)
User Datagram Protocol, Src Port: ntp (123), Dst Port: 53531 (53531)
Network Time Protocol
    Flags: 0x24
        00.. .... = Leap Indicator: no warning (0)
        ..10 0... = Version number: NTP Version 4 (4)
        .... .100 = Mode: server (4)
    Peer Clock Stratum: secondary reference (3)
    Peer Polling Interval: 4 (16 sec)
    Peer Clock Precision: 0.000001 sec
    Root Delay:    0.0388 sec
    Root Dispersion:    0.1307 sec
    Reference Clock ID: 192.231.203.132
    Reference Clock Update Time: Apr  2, 2010 02:05:40.4534 UTC
    Originate Time Stamp: Apr  2, 2010 02:12:51.5572 UTC
    Receive Time Stamp: Apr  2, 2010 02:12:51.5165 UTC
    Transmit Time Stamp: Apr  2, 2010 02:12:51.5165 UTC

0000  00 1a 4d 70 61 9c 00 40 f4 c1 3e 76 08 00 45 00   ..Mpa..@..>v..E.
0010  00 4c 00 00 40 00 40 11 b7 49 c0 a8 01 01 c0 a8   .L..@.@..I......
0020  01 06 00 7b d1 1b 00 38 82 6e 24 03 04 ec 00 00   ...{...8.n$.....
0030  09 ef 00 00 21 73 c0 e7 cb 84 cf 5f cf 74 74 10   ....!s....._.tt.
0040  e8 71 cf 5f d1 23 8e a1 83 72 cf 5f d1 23 84 38   .q._.#...r._.#.8
0050  8d a6 cf 5f d1 23 84 3b c2 52                     ..._.#.;.R

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In the request the first UDP payload byte is the "e3" on line 23 of the listing.

**kknd** · 2nd April 2010, 11:31

thanks to everyone, now it is one step ahead. the code works as a client and retrieves server response. i used wireshark(it didnt like wireless but got the frames with cable connection) to examine the client and server packets, i used my code and an SNTPClient Solution from DaveyM69, the problem was the udp request(as many of you mentioned), i used very stupid(because its not complex) way to code my request. its shown below, now the problem is to get the data(i couldnt read it or show it, dont know why)..

Qt Code:

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void AtomicClock::connectSuccsess()
{
    ui->time->setText("Connected");    
    QByteArray timeRequest(48, 0);
    timeRequest[0] = 0x23;       //Obs! first byte, important, makes a ntp client version 4, lazy way
                                            //the rest of the btes sends null, it means very wrong timestamps, but i dont need them now..just get the
                                           //time from server.
    udpSocket->write(timeRequest);
}

void AtomicClock::connectSuccsess()
{
    ui->time->setText("Connected");    
    QByteArray timeRequest(48, 0);
    timeRequest[0] = 0x23;       //Obs! first byte, important, makes a ntp client version 4, lazy way
                                            //the rest of the btes sends null, it means very wrong timestamps, but i dont need them now..just get the
                                           //time from server.
    udpSocket->write(timeRequest);
}

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the second part which is stll not working properly..

Qt Code:

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void AtomicClock::readPendingDatagrams()
{
    ui->statusLabel->setText("Reading...");
    QByteArray newTime;
 
    do {
        newTime.resize(udpSocket->pendingDatagramSize());
        udpSocket->read(newTime.data(), newTime.size());
    } while(udpSocket->hasPendingDatagrams());
 
    QString dateTime;
    QDataStream in(&newTime, QIODevice::ReadOnly);
    in.setVersion(QDataStream::Qt_4_6);
    in >> dateTime;
    ui->textEdit->setText(dateTime);
}

void AtomicClock::readPendingDatagrams()
{
    ui->statusLabel->setText("Reading...");
    QByteArray newTime;

    do {
        newTime.resize(udpSocket->pendingDatagramSize());
        udpSocket->read(newTime.data(), newTime.size());
    } while(udpSocket->hasPendingDatagrams());

    QString dateTime;
    QDataStream in(&newTime, QIODevice::ReadOnly);
    in.setVersion(QDataStream::Qt_4_6);
    in >> dateTime;
    ui->textEdit->setText(dateTime);
}

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**ChrisW67** · 3rd April 2010, 01:31

You are not getting a response because there's insufficient information in the request you are sending. The minimum that seems to elicit a response from my NTP server is (hex):

Qt Code:

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echo -ne "\xe3\x00\x04\xfa\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" | nc -u ptolemy 123 | od -tx1
0000000 24 03 04 ec 00 00 09 ac 00 00 28 4a c0 e7 cb 84
0000020 cf 61 03 93 73 5d d6 6e 00 00 00 00 00 00 00 00
0000040 cf 61 09 af 61 26 62 2c cf 61 09 af 61 29 fa 5e

echo -ne "\xe3\x00\x04\xfa\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" | nc -u ptolemy 123 | od -tx1
0000000 24 03 04 ec 00 00 09 ac 00 00 28 4a c0 e7 cb 84
0000020 cf 61 03 93 73 5d d6 6e 00 00 00 00 00 00 00 00
0000040 cf 61 09 af 61 26 62 2c cf 61 09 af 61 29 fa 5e

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The first ten bytes have values. (nc is the netcat utility)

You still need to disassemble the 64-bit time stamp into something that you can use as a time.

**kknd** · 3rd April 2010, 12:48

Hi, I managed to get response from the ntp server, if you just see my code up there. now the problem is to get the transmit timestamp or read it in a proper way to get the time UTC 1.1.1970 + seconds.. I changed my readPendingDatagrams() function..but it gives ugly reply if i run the code. Can i get little bit help for that? i am just conderned wtih last 8 bytes(transmit stamp)..thanks.

Qt Code:

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void AtomicClock::readPendingDatagrams()
{
    ui->statusLabel->setText("Reading...");
    QByteArray newTime;
    QDateTime Epoch(QDate(1900, 1, 1));
    do {
        newTime.resize(udpSocket->pendingDatagramSize());
        udpSocket->read(newTime.data(), newTime.size());
    } while(udpSocket->hasPendingDatagrams());
 
    QByteArray TransmitTimeStamp ;
    TransmitTimeStamp = newTime.right(8);
 
    quint64 seconds = 0;
    for (int i=0; i<= 3; i++)
    {
         seconds = (seconds << 8) | TransmitTimeStamp[i];
    }
    quint64 fractions = 0;
    for (int i=4; i<= 7; i++)
    {
         fractions = (fractions << 8) | TransmitTimeStamp[i];
     }
    double ticks = seconds + (fractions / 0x100000000L);
 
    ui->textEdit->append(QString::number(ticks,' ', 0));
    //QDateTime  newestTime = Epoch + ticks;

void AtomicClock::readPendingDatagrams()
{
    ui->statusLabel->setText("Reading...");
    QByteArray newTime;
    QDateTime Epoch(QDate(1900, 1, 1));
    do {
        newTime.resize(udpSocket->pendingDatagramSize());
        udpSocket->read(newTime.data(), newTime.size());
    } while(udpSocket->hasPendingDatagrams());

    QByteArray TransmitTimeStamp ;
    TransmitTimeStamp = newTime.right(8);

    quint64 seconds = 0;
    for (int i=0; i<= 3; i++)
    {
         seconds = (seconds << 8) | TransmitTimeStamp[i];
    }
    quint64 fractions = 0;
    for (int i=4; i<= 7; i++)
    {
         fractions = (fractions << 8) | TransmitTimeStamp[i];
     }
    double ticks = seconds + (fractions / 0x100000000L);

    ui->textEdit->append(QString::number(ticks,' ', 0));
    //QDateTime  newestTime = Epoch + ticks;

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**kknd** · 3rd April 2010, 23:10

yes, got it! even i cant call that code perfect, it works, sends ntp client request ver. 4 to server on udp port 123 and gets server response 48 bytes, after that TransmitTimeStamp is choosen from the bytearray last (8 bytes), actually i used just the seconds the first 4 bytes but not last 4 bytes(fraction) dont need to be very sensitive within this prog. code includes some labels and texedit objects, the purpose is just to see on gui how the code would run.. i copy my code here, so maybe someone needs in the future. thanks eveyone on this thread..got much help with wireshark, and ntp request advices..

Qt Code:

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#ifndef ATOMICCLOCK_H
#define ATOMICCLOCK_H
 
#include <QMainWindow>
#include <QAbstractSocket>
#include <QUdpSocket>
#include <QHostInfo>
#include <QHostAddress>
#include <QDateTime>
namespace Ui {
    class AtomicClock;
}
 
class AtomicClock : public QMainWindow {
    Q_OBJECT
public:
    AtomicClock(QWidget *parent = 0);
    ~AtomicClock();
 
protected:
    void changeEvent(QEvent *e);
 
private:
    Ui::AtomicClock *ui;
    QUdpSocket *udpSocket;
 
private slots:
    void on_TimeUpdate_clicked();
    void readPendingDatagrams();
    void connectSuccsess();
};
 
#endif // ATOMICCLOCK_H

#ifndef ATOMICCLOCK_H
#define ATOMICCLOCK_H

#include <QMainWindow>
#include <QAbstractSocket>
#include <QUdpSocket>
#include <QHostInfo>
#include <QHostAddress>
#include <QDateTime>
namespace Ui {
    class AtomicClock;
}

class AtomicClock : public QMainWindow {
    Q_OBJECT
public:
    AtomicClock(QWidget *parent = 0);
    ~AtomicClock();

protected:
    void changeEvent(QEvent *e);

private:
    Ui::AtomicClock *ui;
    QUdpSocket *udpSocket;

private slots:
    void on_TimeUpdate_clicked();
    void readPendingDatagrams();
    void connectSuccsess();
};

#endif // ATOMICCLOCK_H

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Qt Code:

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#include "atomicclock.h"
#include "ui_atomicclock.h"
 
AtomicClock::AtomicClock(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::AtomicClock)
{
    ui->setupUi(this);
}
AtomicClock::~AtomicClock()
{
    delete ui;
    udpSocket->close();
}
void AtomicClock::changeEvent(QEvent *e)
{
    QMainWindow::changeEvent(e);
    switch (e->type()) {
    case QEvent::LanguageChange:
        ui->retranslateUi(this);
        break;
    default:
        break;
    }
}
void AtomicClock::on_TimeUpdate_clicked()
{
    QHostInfo info = QHostInfo::fromName("0.pool.ntp.org");
    QString ipAddress = info.addresses().first().toString();
    ui->ipAddress->setText(ipAddress);
    udpSocket = new QUdpSocket(this);
 
    connect(udpSocket, SIGNAL(readyRead()), this, SLOT(readPendingDatagrams()));
    connect(udpSocket, SIGNAL(connected()), this, SLOT(connectSuccsess()));
    udpSocket->abort();
    udpSocket->connectToHost("0.pool.ntp.org", 123);
}
void AtomicClock::readPendingDatagrams()
{
    ui->statusLabel->setText("Reading...");
    QByteArray newTime;
    QDateTime Epoch(QDate(1900, 1, 1));
    QDateTime unixStart(QDate(1970, 1, 1));
    do {
        newTime.resize(udpSocket->pendingDatagramSize());
        udpSocket->read(newTime.data(), newTime.size());
    } while(udpSocket->hasPendingDatagrams());
 
    QByteArray TransmitTimeStamp ;
    TransmitTimeStamp = newTime.right(8);
 
    quint64 seconds = 0;
    for (int i=0; i<= 3; ++i)
    {
         seconds = (seconds << 8) | TransmitTimeStamp[i];
    }
 
    ui->textEdit->append(QString::number(seconds, 10));
    QDateTime newestTime;
    newestTime.setTime_t(seconds - Epoch.secsTo(unixStart));
    ui->textEdit->append(newestTime.toString());
}
void AtomicClock::connectSuccsess()
{
    ui->time->setText("Connected");    
    QByteArray timeRequest(48, 0);
    timeRequest[0] = '\x23';
    udpSocket->flush();
    udpSocket->write(timeRequest); 
}

#include "atomicclock.h"
#include "ui_atomicclock.h"

AtomicClock::AtomicClock(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::AtomicClock)
{
    ui->setupUi(this);
}
AtomicClock::~AtomicClock()
{
    delete ui;
    udpSocket->close();
}
void AtomicClock::changeEvent(QEvent *e)
{
    QMainWindow::changeEvent(e);
    switch (e->type()) {
    case QEvent::LanguageChange:
        ui->retranslateUi(this);
        break;
    default:
        break;
    }
}
void AtomicClock::on_TimeUpdate_clicked()
{
    QHostInfo info = QHostInfo::fromName("0.pool.ntp.org");
    QString ipAddress = info.addresses().first().toString();
    ui->ipAddress->setText(ipAddress);
    udpSocket = new QUdpSocket(this);

    connect(udpSocket, SIGNAL(readyRead()), this, SLOT(readPendingDatagrams()));
    connect(udpSocket, SIGNAL(connected()), this, SLOT(connectSuccsess()));
    udpSocket->abort();
    udpSocket->connectToHost("0.pool.ntp.org", 123);
}
void AtomicClock::readPendingDatagrams()
{
    ui->statusLabel->setText("Reading...");
    QByteArray newTime;
    QDateTime Epoch(QDate(1900, 1, 1));
    QDateTime unixStart(QDate(1970, 1, 1));
    do {
        newTime.resize(udpSocket->pendingDatagramSize());
        udpSocket->read(newTime.data(), newTime.size());
    } while(udpSocket->hasPendingDatagrams());

    QByteArray TransmitTimeStamp ;
    TransmitTimeStamp = newTime.right(8);

    quint64 seconds = 0;
    for (int i=0; i<= 3; ++i)
    {
         seconds = (seconds << 8) | TransmitTimeStamp[i];
    }

    ui->textEdit->append(QString::number(seconds, 10));
    QDateTime newestTime;
    newestTime.setTime_t(seconds - Epoch.secsTo(unixStart));
    ui->textEdit->append(newestTime.toString());
}
void AtomicClock::connectSuccsess()
{
    ui->time->setText("Connected");    
    QByteArray timeRequest(48, 0);
    timeRequest[0] = '\x23';
    udpSocket->flush();
    udpSocket->write(timeRequest); 
}

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**kknd** · 9th April 2010, 18:03

hi again,

the code over there sometimes does not work, do you know why? i need to make it correct, nedd help of you , guys!

can not get (or calculate wrong) correct time from server..

thanks in advance

Qt Code:

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#
void AtomicClock::readPendingDatagrams()
#
{
#
ui->statusLabel->setText("Reading...");
#
QByteArray newTime;
#
QDateTime Epoch(QDate(1900, 1, 1));
#
QDateTime unixStart(QDate(1970, 1, 1));
#
do {
#
newTime.resize(udpSocket->pendingDatagramSize());
#
udpSocket->read(newTime.data(), newTime.size());
#
} while(udpSocket->hasPendingDatagrams());
#
 
#
QByteArray TransmitTimeStamp ;
#
TransmitTimeStamp = newTime.right(8);
#
 
#
quint64 seconds = 0;
#
for (int i=0; i<= 3; ++i)
#
{
#
seconds = (seconds << 8) | TransmitTimeStamp[i];
#
}
#
 
#
ui->textEdit->append(QString::number(seconds, 10));
#
QDateTime newestTime;
#
newestTime.setTime_t(seconds - Epoch.secsTo(unixStart));
#
ui->textEdit->append(newestTime.toString());

#
void AtomicClock::readPendingDatagrams()
#
{
#
ui->statusLabel->setText("Reading...");
#
QByteArray newTime;
#
QDateTime Epoch(QDate(1900, 1, 1));
#
QDateTime unixStart(QDate(1970, 1, 1));
#
do {
#
newTime.resize(udpSocket->pendingDatagramSize());
#
udpSocket->read(newTime.data(), newTime.size());
#
} while(udpSocket->hasPendingDatagrams());
#
 
#
QByteArray TransmitTimeStamp ;
#
TransmitTimeStamp = newTime.right(8);
#
 
#
quint64 seconds = 0;
#
for (int i=0; i<= 3; ++i)
#
{
#
seconds = (seconds << 8) | TransmitTimeStamp[i];
#
}
#
 
#
ui->textEdit->append(QString::number(seconds, 10));
#
QDateTime newestTime;
#
newestTime.setTime_t(seconds - Epoch.secsTo(unixStart));
#
ui->textEdit->append(newestTime.toString());

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Re: Ntp client does not work! urgent!

Re: Ntp client does not work! urgent!

Re: Ntp client does not work! urgent!

Re: Ntp client does not work! urgent!

Re: Ntp client does not work! urgent!

Re: Ntp client does not work! urgent!

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