networking - how to check computer's state using Qt?

Question

i'm trying to get computer's state in my LAN... thought about using QTcpSocket but it's not realy effective since port also should be inserted as:

socket->connectToHost("hostName", portNumber);
if (socket->waitForConnected(1000))
     qDebug("Connected!");

can anyone demonstare me a better way to check if computer is responding ?

Answer 1

ping

int exitCode = QProcess::execute("ping", QStringList() << "-c1" << "hostname");
if (0 == exitCode) {
    // it's alive
} else {
    // it's dead
}

Arguments may vary. For example, I believe it would be ping -n 1 "hostname" on Windows. The example should work on most non-Windows versions.