How to send ping and receive data

[taek seo]

i have 32 boards that connected network,
each board has ipaddress
so, i want check boards are connected correctly by using send ping
How to send ping and receive data ?

[mrjj]

@taek-seo said:
Hi
A quick way is to use QProcess and call external ping command
https://github.com/edhana/qt-ping-example

If thats not an option, you need to dive into networking
http://doc.qt.io/qt-5/qtnetwork-programming.html

[kshegunov]

@mrjj, @taek-seo

If thats not an option, you need to dive into networking

You can't compose ICMP message through Qt. So the only viable way is to send your own pseudo "ping" through a datagram for example and put a timeout to that. However, the devices should be aware of such communications and have to able to respond respectively.

[mrjj]

@kshegunov said:

ICMP

not even when run with elevated privileges ?

[kshegunov]

@mrjj

not even when run with elevated privileges ?

No, not really. ICMP is really under the TCP/IP stack so you can't.

[mrjj]

@kshegunov
ok that explains why all seem to run ping as external process to ping something :)

[taek seo]

@mrjj Thank you!!!
I solved!! by using QProcess

    QString nParameter = "-n";
    QString pingCount = "1"; //(int)
    QString wParameter = "-w";
    QString pingWaitTime = "10"; //(ms)
    pingProcess = new QProcess;
    int exitCode = pingProcess->execute("ping",strIpaddress[i]<<nParameter<<pingCount<<wParameter<<pingWaitTime);
    if (exitCode==0){
        s_ApplyBoard->addItem(bdName[i]);
    }

and i want "Loading" shape mouse cursor when processing, use this :
QApplication::setOverrideCursor(Qt::WaitCursor);
QApplication::restoreOverrideCursor();

[taek seo]

This post is deleted!

[flyingtree]

You can use boost to achieve that.
Check this boost asio ping example