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#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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