how to read pc's network IP address

[wei243]

how use qt coding to read pc's network IP / internet IP address instead of 127.0.0.1?

[patrik08]

how use qt coding to read pc's network IP / internet IP address instead of 127.0.0.1?

On Window OS....

void Gui_FrontPage::TestQprocessqt4()
{
 
    QProcess process;
    #if defined Q_WS_WIN
    process.setReadChannelMode(QProcess::MergedChannels);
    process.start("ipconfig" ,  QStringList() << "/all");
 
    if (!process.waitForFinished()) {
        msgb->information( this , "QT4 function test", process.errorString() );
    } else {
      msgb->information( this , "QT4 function test", process.readAll() ); 
    }
 
    #endif
}

void Gui_FrontPage::TestQprocessqt4()
{
    
    QProcess process;
    #if defined Q_WS_WIN
    process.setReadChannelMode(QProcess::MergedChannels);
    process.start("ipconfig" ,  QStringList() << "/all");
   
    if (!process.waitForFinished()) {
        msgb->information( this , "QT4 function test", process.errorString() );
    } else {
      msgb->information( this , "QT4 function test", process.readAll() ); 
    }
     
    #endif
}

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on linux only admin user can discovery
sudo ifconfig

[wei243]

thx patrix08,
it is amazing - ur program show all the detail of ipconfig.
if i want to show ip address only, wat should i do?

[patrik08]

thx patrix08,
it is amazing - ur program show all the detail of ipconfig.
if i want to show ip address only, wat should i do?

first job .... split all line to a qstringlist....
register gateway or dns or network adress...
&& after .... http://www.regular-expressions.info/examples.html ...IP . && grep your
ip http://doc.trolltech.com/4.2/qregexp.html

similar to http://www.qtforum.de/forum/viewtopi...ighlight=regex

[wei243]

i failed to try the QRegExp in reading the ip address from qprocess's return string.
actually i m a newbie n never seen QRegExp.
pls give me an example coding to read it.
thx

[patrik08]

i failed to try the QRegExp in reading the ip address from qprocess's return string.
actually i m a newbie n never seen QRegExp.
pls give me an example coding to read it.
thx

Google have so match QRegExp ip adress
on is.....
http://lists.trolltech.com/qt-intere...ad00085-0.html
search on http://www.koders.com/ you can find app piece and code trick ...


if you beginn on qt search qt function on http://www.koders.com/ && test it....

I learning qt 50% from http://www.koders.com/ && 30% from books and the rest from my php5 objekt know-how ....

My original work is cook chief 15 years a go.... and on 1999 i begin to write php & phython


untested code .....

QString incomming = "result from ipconfig /all";  /* qprocess read*/
 QStringList alline = split("\n");; 
 
 
for (int i = 0; i < alline.size(); ++i)   {
          QString onrow = alline.at(i);
          if (onrow.contain("dns")) {
          /*  list onrow.split(" "); */
           qDebug() << "### onrow  " << onrow;
          }
 
 }
 
QString   myip = "[0-9]{1,3}(.[0-9]{1,3}){3,3}";
 
 
QString str = "dgsdgsdgsdgsgsg  192.168.1.71  sdgdsgsgsgsdgsdgsg";
 
QRegExp expression( myip , Qt::CaseInsensitive );
    expression.setMinimal(true);
    int iPosition = 0;
    while( (iPosition = expression.indexIn( str , iPosition )) != -1 ) {
        QString grep = expression.cap( 1 );
 
        qDebug() << "### grep  " << grep;
        iPosition += expression.matchedLength();
    }

QString incomming = "result from ipconfig /all";  /* qprocess read*/
 QStringList alline = split("\n");; 


for (int i = 0; i < alline.size(); ++i)   {
          QString onrow = alline.at(i);
          if (onrow.contain("dns")) {
          /*  list onrow.split(" "); */
           qDebug() << "### onrow  " << onrow;
          }

 }

QString   myip = "[0-9]{1,3}(.[0-9]{1,3}){3,3}";

    
QString str = "dgsdgsdgsdgsgsg  192.168.1.71  sdgdsgsgsgsdgsdgsg";

QRegExp expression( myip , Qt::CaseInsensitive );
    expression.setMinimal(true);
    int iPosition = 0;
    while( (iPosition = expression.indexIn( str , iPosition )) != -1 ) {
        QString grep = expression.cap( 1 );

        qDebug() << "### grep  " << grep;
        iPosition += expression.matchedLength();
    }

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&& on line 84 from http://qt-webdav.svn.sourceforge.net....h?view=markup
you find a sample wo find html image tag....
from my projekt

[wei243]

i manage to get ip now. thx alot.

[wysota]

With QT 4.2+ you can use QNetworkInterface:

#include <QtDebug>
QList<QHostAddress> addrlist = QNetworkInterface::allAddresses();
foreach(QHostAddress addr, addrlist){
  qDebug() << addr.toString();
}

#include <QtDebug>
QList<QHostAddress> addrlist = QNetworkInterface::allAddresses();
foreach(QHostAddress addr, addrlist){
  qDebug() << addr.toString();
}

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[wandson]

Continuing this thread, how'd you do that on linux. Specifically, I need to retrieve gateway address on linux.
Regards,

[wysota]

The gateway address is not tied to an interface. Each system can have any number of gateways. You can run "route -n" and parse it to find the default gateway (one for 0.0.0.0 network) or do the same for /proc/net/route but that's probably everything that can be done (unless HAL exposes gateway definitions).

[ManicQin]

The gateway address is not tied to an interface. Each system can have any number of gateways. You can run "route -n" and parse it to find the default gateway (one for 0.0.0.0 network) or do the same for /proc/net/route but that's probably everything that can be done (unless HAL exposes gateway definitions).

Meaning there is no ... QT way to get the gateway?
Is there a Qt wrapper class for getting the Adapter information?
(information such as the DHCP enabled, adapter name and etc. )

[wysota]

Gateway and network interface are two completely different things. For the latter see QNetworkInterface.

[wandson]

Thanks for the answer. I guess the simplest way is to use QProcess to run route -n command.
Regards