nicselector.cpp Example File

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 #include <limits>

 #include <QtCore>
 #include <QtNetwork>

 #include "nicselector.h"
 #include "ui_nicselector.h"

 NicSelector::NicSelector(QWidget *parent) :
     QDialog(parent),
     ui(new Ui::NicSelector)
 {
     ui->setupUi(this);
     auto portValidator = new QIntValidator(0, int(std::numeric_limits<quint16>::max()),
                                            ui->portSelector);
     ui->portSelector->setValidator(portValidator);
     ui->portSelector->setText(QStringLiteral("22334"));

     const QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
     availableAddresses.reserve(ipAddressesList.size());
     for (const QHostAddress &ip : ipAddressesList) {
         if (ip != QHostAddress::LocalHost && ip.toIPv4Address()) {
             availableAddresses.push_back(ip);
             ui->ipSelector->addItem(ip.toString());
         }
     }
 }

 NicSelector::~NicSelector()
 {
     delete ui;
 }

 QHostAddress NicSelector::selectedIp() const
 {
     if (!availableAddresses.size())
         return {};

     return availableAddresses[ui->ipSelector->currentIndex()];
 }

 quint16 NicSelector::selectedPort() const
 {
     return quint16(ui->portSelector->text().toUInt());
 }