| -rw-r--r-- | example/ntp.cpp | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/example/ntp.cpp b/example/ntp.cpp new file mode 100644 index 0000000..5357cae --- a/dev/null +++ b/example/ntp.cpp @@ -0,0 +1,130 @@ +#include "ntp.h" +#include <qpushbutton.h> +#include <qregexp.h> +#include <qlabel.h> +#include <qlineedit.h> +#include <qmultilineedit.h> +#include <opie/oprocess.h> +#include <qpe/config.h> +#include <qpe/global.h> +#include <qpe/timeconversion.h> +#include <qpe/tzselect.h> +#include <qpe/timestring.h> +#include <qpe/qpedialog.h> +#include <sys/time.h> +#include <time.h> +#include <stdlib.h> + + +Ntp::Ntp( QWidget* parent, const char* name, WFlags fl ) + : NtpBase( parent, name, fl ) +{ + Config cfg("ntp",Config::User); + cfg.setGroup("settings"); + _maxOffset = cfg.readNumEntry("maxOffset",5); + _minLookupDiff = cfg.readNumEntry("minLookupDiff",10); + LineEditNtpServer->setText( cfg.readEntry("ntpServer") ); + ntpProcess = new OProcess( ); + connect ( ntpProcess, SIGNAL(receivedStdout(OProcess*,char*,int)), + this, SLOT(getNtpOutput(OProcess*,char*,int))); + connect ( ntpProcess, SIGNAL(processExited(OProcess*)), + this, SLOT(ntpFinished(OProcess*))); + connect(runNtp, SIGNAL(clicked()), this, SLOT(slotRunNtp())); + _nextCorrection = new QTimer( this ); + connect( _nextCorrection, SIGNAL(timeout()), SLOT(correctClock()) ); + slotRunNtp(); +} + +Ntp::~Ntp() +{ + Config cfg("ntp",Config::User); + cfg.setGroup("settings"); + cfg.writeEntry("ntpServer", LineEditNtpServer->text()); +} + + +void Ntp::slotRunNtp() +{ + TextLabelStartTime->setText(QDateTime::currentDateTime().toString()); + ntpProcess->clearArguments(); + *ntpProcess << "ntpdate" << LineEditNtpServer->text(); + bool ret = ntpProcess->start(OProcess::NotifyOnExit,OProcess::AllOutput); + if ( !ret ) { + qDebug("Error while executing ntp"); + outPut->append("\nError while executing\n\n"); + } +} + +void Ntp::getNtpOutput(OProcess *proc, char *buffer, int buflen) +{ + QString lineStr, lineStrOld; + lineStr = buffer; + lineStr=lineStr.left(buflen); + if (lineStr!=lineStrOld) + { + outPut->append(lineStr); + _ntpOutput += lineStr; + } + lineStrOld = lineStr; +} + +void Ntp::ntpFinished(OProcess*) +{ + Config cfg("ntp",Config::User); + cfg.setGroup("lookups"); + int lastLookup = cfg.readNumEntry("time",0); + int lookupCount = cfg.readNumEntry("count",-1); + int time = TimeConversion::toUTC( QDateTime::currentDateTime() ); + cfg.writeEntry("time", time); + + float timeShift = getTimeShift(); + int secsSinceLast = time - lastLookup; + TextLabelNewTime->setText(QDateTime::currentDateTime().toString()); + if ( lastLookup > 0 && secsSinceLast > 60*_minLookupDiff) + { + lookupCount++; + cfg.writeEntry("count",lookupCount); + cfg.setGroup("lookup_"+QString::number(lookupCount)); + _shiftPerSec = timeShift / secsSinceLast; + float nextCorr = _maxOffset / _shiftPerSec; + qDebug("secs since last lookup %i", secsSinceLast);qDebug("timeshift since last lookup %f", timeShift);qDebug("timeshift since per sec %f", _shiftPerSec);qDebug("in %f secs the time will be shifted by %i", nextCorr,_maxOffset); + cfg.writeEntry("secsSinceLast",secsSinceLast); + cfg.writeEntry("timeShift",QString::number(timeShift)); + } +} + +void Ntp::correctClock() +{ + qDebug("current time: %s",QDateTime::currentDateTime().toString().latin1()); + Config cfg("ntp",Config::User); + cfg.setGroup("correction"); + int lastTime = cfg.readNumEntry("time",0); + int now = TimeConversion::toUTC( QDateTime::currentDateTime() ); + int corr = int((now - lastTime) * _shiftPerSec); + outPut->append( "time will be shifted by "+QString::number(corr)+ "secs"); + struct timeval myTv; + myTv.tv_sec = TimeConversion::toUTC( QDateTime::currentDateTime().addSecs(corr) ); + myTv.tv_usec = 0; + + if ( myTv.tv_sec != -1 ) + ::settimeofday( &myTv, 0 ); + Global::writeHWClock(); + cfg.writeEntry("time",now); + qDebug("current time: %s",QDateTime::currentDateTime().toString().latin1()); +} + +float Ntp::getTimeShift() +{ + QString _offset = "offset"; + QString _sec = "sec"; + QRegExp _reOffset = QRegExp(_offset); + QRegExp _reEndOffset = QRegExp(_sec); + int posOffset = _reOffset.match( _ntpOutput ); + int posEndOffset = _reEndOffset.match( _ntpOutput, posOffset ); + posOffset += _offset.length() + 1; + QString diff = _ntpOutput.mid(posOffset, posEndOffset-posOffset-1); + qDebug("%s", _ntpOutput.latin1()); + qDebug("diff = >%s<",diff.latin1()); + TextLabelTimeShift->setText(diff); + return diff.toFloat(); +}
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