如何在 Qt 中检查网络接口的类型？

Question

我的代码：

CheckNetwork.h

#include <QMainWindow>
#include <QDebug>
#include <QNetworkInterface>
#include <QNetworkAccessManager>
#include <QNetworkConfiguration>
#include <QNetworkConfigurationManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QNetworkSession>

namespace Ui {
class CheckNetwork;
}

class CheckNetwork : public QMainWindow
{
    Q_OBJECT

public:
    explicit CheckNetwork(QWidget *parent = 0);
    ~CheckNetwork();

protected:
    void showEvent(QShowEvent *event);
private slots:
    void reply_finished();
    void network_configuration_manager_updateCompleted();
private:
    Ui::CheckNetwork *ui;
    QNetworkInterface *network_interface;
    QNetworkConfigurationManager *network_configuration_manager;
    QNetworkSession *network_session;
    QNetworkReply *reply;

};

CheckNetwork.cpp

#include "checknetwork.h"
#include "ui_checknetwork.h"


/*

Qt Creator 3.3.1 (opensource)
Qt 5.4.1 (MSVC 2010, 32 bit)

*/

CheckNetwork::CheckNetwork(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::CheckNetwork)
{
    ui->setupUi(this);
}

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

void CheckNetwork::showEvent(QShowEvent *event){

    ui->textEdit->append("-----------------");
    ui->textEdit->append("NetworkInterfaces");
    ui->textEdit->append("-----------------");
    ui->textEdit->append("UP AND RUNNING:");
    network_interface = new QNetworkInterface();
    foreach (QNetworkInterface interface, network_interface->allInterfaces()) {
        if((interface.flags() & QNetworkInterface::IsUp) && (interface.flags() & QNetworkInterface::IsRunning))
            ui->textEdit->append("\t" + interface.name() + " " + interface.humanReadableName() + " " + interface.hardwareAddress());
    }


    ui->textEdit->append("-----------------------------");
    ui->textEdit->append("Network Configuration Manager");
    ui->textEdit->append("-----------------------------");
    ui->textEdit->append("ACTIVE:");
    network_configuration_manager = new QNetworkConfigurationManager(this);
    QObject::connect(network_configuration_manager, SIGNAL(updateCompleted()), this, SLOT(network_configuration_manager_updateCompleted()));
    network_configuration_manager->updateConfigurations();
}


void CheckNetwork::network_configuration_manager_updateCompleted(){
    foreach (QNetworkConfiguration configuration, network_configuration_manager->allConfigurations(QNetworkConfiguration::Active)) {
        ui->textEdit->append("\t" + configuration.name() + " " + configuration.bearerTypeName() + " " + configuration.identifier());
    }
    ui->textEdit->append("DEFAULT:");
    ui->textEdit->append("\t" + network_configuration_manager->defaultConfiguration().name() + " " + network_configuration_manager->defaultConfiguration().bearerTypeName());

    ui->textEdit->append("---------------");
    ui->textEdit->append("Network Session");
    ui->textEdit->append("---------------");
    network_session = new QNetworkSession(network_configuration_manager->defaultConfiguration(), this);
    network_session->open();
    if(network_session->isOpen()){
        ui->textEdit->append("\tisOpen");
    }else{
        ui->textEdit->append("\tnoOpen");
    }


    ui->textEdit->append("---------------");
    ui->textEdit->append("Network Manager");
    ui->textEdit->append("---------------");
    QNetworkAccessManager *network_access_manager = new QNetworkAccessManager(this);
    reply = network_access_manager->get(QNetworkRequest(QUrl("http://www.google.com")));
    QObject::connect(reply, SIGNAL(finished()), this, SLOT(reply_finished()));
}



void CheckNetwork::reply_finished(){
    ui->textEdit->append("REPLY: " + QString::number(reply->bytesAvailable()) + " byte(s)");
    ui->textEdit->append("REPLY DATAS: \n\n" + reply->readAll());
}

带有无线（WLAN）网卡（win 8.1 64bit）的QTextEdit内容：

-----------------
NetworkInterfaces
-----------------
UP AND RUNNING:
    {UUID} Wi-Fi XX:XX:XX:XX:XX:XX
    {UUID} VirtualBox Host-Only Network XX:XX:XX:XX:XX:XX
    {UUID} Loopback Pseudo-Interface 1 
    {UUID} Local Network Connexion* 2 XX:XX:XX:XX:XX:XX:XX:XX
-----------------------------
Network Configuration Manager
-----------------------------
ACTIVE:
    NetworkWireslessName WLAN XXXXXXXXX
    Local Network Connexion* 2 Unknown XXXXXXXXX
    VirtualBox Host-Only Network Ethernet XXXXXXXXX
    Wi-Fi Ethernet XXXXXXXXX
DEFAULT:
    VirtualBox Host-Only Network Ethernet
---------------
Network Session
---------------
    isOpen
---------------
Network Manager
---------------
REPLY: 256 byte(s)
REPLY DATAS: 

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带有有线（LAN）网卡（Win7 64bit / Win10 32bit）的QTextEdit内容：

-----------------
NetworkInterfaces
-----------------
UP AND RUNNING:
    {UUID} Local Network Connexion XX:XX:XX:XX:XX:XX
    {UUID} Loopback 
-----------------------------
Network Configuration Manager
-----------------------------
ACTIVE:
DEFAULT:

---------------
Network Session
---------------
    noOpen
---------------
Network Manager
---------------
REPLY: 258 byte(s)
REPLY DATAS: 
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我的问题是我没办法检查网络接口的类型，如果是“有线或无线”就在“在线”防止networkmanager自动启动连接网络（QNetworkConfigurationManager::CanStartAndStopInterfaces）如果用户未连接，因为通过此验证：

network_configuration_manager->defaultConfiguration();
if(!network_configuration_manager->isOnline()){        
        network_configuration_manager->deleteLater();
        return;
}

这非常适用于无线连接，但由于没有通过此检查找到连接电缆的默认配置，网络管理器无法继续...换句话说，如果网络连接正常，如何检查连接电缆活动的（不 ping 或查询诸如 Google 之类的服务器）。我也读过一些以前的版本存在类似的错误。例如，在这个版本的 Qt 中，我在他的消息框中有错误，那会是错误吗？会有人提供信息吗？谢谢

Answer 1

您应该能够检查承载类型以查看它是否是 wifi 连接，即：

configuration.bearerType() == QNetworkConfiguration::BearerWLAN

Answer 2

过程应该是，我认为：

1. 从管理器获取所有网络配置。

2. 为每个活动配置创建会话。

3. 查看会话的界面。检查QNetworkInterface::flags() 是否有QNetworkInterface::IsUp。

这样您也可以从非默认会话中检查接口。