refactor: C++ 后端文件移入 src/ 目录，优化项目结构层级
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// SPDX-FileCopyrightText: 2024 MyCompany
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//
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// SPDX-License-Identifier: LGPL-3.0-or-later
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#include "networkmonitorapplet.h"
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#include <pluginfactory.h>
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#include <QFile>
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#include <QTextStream>
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#include <QDebug>
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#include <QDir>
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#include <QRegularExpression>
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#include <QNetworkInterface>
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DS_BEGIN_NAMESPACE
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NetworkMonitorApplet::NetworkMonitorApplet(QObject *parent)
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: DApplet(parent)
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, m_refreshTimer(nullptr)
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, m_lastRxBytes(0)
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, m_lastTxBytes(0)
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, m_downloadSpeed(0)
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, m_uploadSpeed(0)
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, m_totalDownload(0)
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, m_totalUpload(0)
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, m_ready(false)
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, m_firstUpdate(true)
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{
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}
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NetworkMonitorApplet::~NetworkMonitorApplet()
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{
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}
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bool NetworkMonitorApplet::load()
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{
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return DApplet::load();
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}
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bool NetworkMonitorApplet::init()
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{
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detectInterfaces();
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// 启动定时刷新
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m_refreshTimer = new QTimer(this);
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connect(m_refreshTimer, &QTimer::timeout, this, &NetworkMonitorApplet::refresh);
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m_refreshTimer->start(1000); // 每秒刷新一次
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// 初始读取
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readNetworkStats();
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return DApplet::init();
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}
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double NetworkMonitorApplet::downloadSpeed() const
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{
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return static_cast<double>(m_downloadSpeed);
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}
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double NetworkMonitorApplet::uploadSpeed() const
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{
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return static_cast<double>(m_uploadSpeed);
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}
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double NetworkMonitorApplet::totalDownload() const
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{
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return static_cast<double>(m_totalDownload);
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}
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double NetworkMonitorApplet::totalUpload() const
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{
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return static_cast<double>(m_totalUpload);
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}
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QStringList NetworkMonitorApplet::networkInterfaces() const
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{
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return m_interfaceList;
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}
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QStringList NetworkMonitorApplet::interfaceStats() const
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{
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QStringList stats;
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for (const QString &name : m_interfaceList) {
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if (m_interfaces.contains(name)) {
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const NetworkInterface &iface = m_interfaces[name];
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stats << QString("%1|%2|%3|%4|%5")
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.arg(iface.name)
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.arg(iface.rxBytes)
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.arg(iface.txBytes)
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.arg(iface.rxPackets)
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.arg(iface.txPackets);
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}
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}
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return stats;
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}
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bool NetworkMonitorApplet::ready() const
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{
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return m_ready;
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}
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QString NetworkMonitorApplet::activeInterface() const
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{
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return m_activeInterface;
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}
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// 返回活动接口的 IPv4 地址，供 QML 显示
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QString NetworkMonitorApplet::ipAddress() const
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{
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return m_ipAddress;
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}
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// 返回活动接口的 IPv6 全球地址，供 QML 显示
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QString NetworkMonitorApplet::ipv6Address() const
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{
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return m_ipv6Address;
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}
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void NetworkMonitorApplet::refresh()
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{
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readNetworkStats();
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}
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void NetworkMonitorApplet::setActiveInterface(const QString &interface)
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{
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if (m_activeInterface != interface) {
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m_activeInterface = interface;
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m_firstUpdate = true;
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emit activeInterfaceChanged();
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// 接口切换后立即检测新接口的 IP 地址
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detectIpAddress();
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}
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}
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void NetworkMonitorApplet::readNetworkStats()
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{
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QFile file("/proc/net/dev");
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if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
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qDebug() << "Failed to open /proc/net/dev";
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return;
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}
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QTextStream stream(&file);
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QStringList lines = stream.readAll().split('\n', Qt::SkipEmptyParts);
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file.close();
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QMap<QString, NetworkInterface> newInterfaces;
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// 跳过前两行标题
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for (int i = 2; i < lines.size(); ++i) {
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QString line = lines[i].trimmed();
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if (line.isEmpty()) continue;
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// 格式: "interface: rx_bytes rx_packets rx_errors rx_dropped ... tx_bytes tx_packets tx_errors tx_dropped ..."
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QRegularExpression re("^([^:]+):\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+\\d+\\s+\\d+\\s+\\d+\\s+\\d+\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)\\s+(\\d+)");
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QRegularExpressionMatch match = re.match(line);
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if (match.hasMatch()) {
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NetworkInterface iface;
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iface.name = match.captured(1);
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iface.rxBytes = match.captured(2).toLongLong();
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iface.rxPackets = match.captured(3).toLongLong();
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iface.rxErrors = match.captured(4).toLongLong();
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iface.rxDropped = match.captured(5).toLongLong();
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iface.txBytes = match.captured(6).toLongLong();
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iface.txPackets = match.captured(7).toLongLong();
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iface.txErrors = match.captured(8).toLongLong();
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iface.txDropped = match.captured(9).toLongLong();
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// 过滤掉回环接口和虚拟接口
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if (iface.name != "lo" && !iface.name.startsWith("veth") &&
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!iface.name.startsWith("docker") && !iface.name.startsWith("br-")) {
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newInterfaces[iface.name] = iface;
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}
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}
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}
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// 检测接口变化
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if (newInterfaces.keys() != m_interfaces.keys()) {
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m_interfaceList = newInterfaces.keys();
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m_interfaces = newInterfaces;
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// 自动选择活动接口
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if (m_activeInterface.isEmpty() && !m_interfaceList.isEmpty()) {
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// 优先选择物理网卡（wlp/wlan/enp/eth）中有流量的接口，
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// 避免选中 Meta/tun0 等虚拟代理接口作为默认显示
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for (const QString &name : m_interfaceList) {
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if (!isPhysicalInterface(name)) continue;
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const NetworkInterface &iface = m_interfaces[name];
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if (iface.rxBytes > 0 || iface.txBytes > 0) {
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m_activeInterface = name;
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break;
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}
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}
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// 其次选择任意有流量的接口（物理网卡都无流量时的兜底）
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if (m_activeInterface.isEmpty()) {
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for (const QString &name : m_interfaceList) {
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const NetworkInterface &iface = m_interfaces[name];
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if (iface.rxBytes > 0 || iface.txBytes > 0) {
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m_activeInterface = name;
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break;
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}
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}
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}
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// 最后选第一个（无任何流量时）
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if (m_activeInterface.isEmpty()) {
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m_activeInterface = m_interfaceList.first();
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}
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emit activeInterfaceChanged();
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}
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m_ready = !m_interfaceList.isEmpty();
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emit interfacesChanged();
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emit readyChanged();
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} else {
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m_interfaces = newInterfaces;
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}
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calculateSpeed();
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emit statsChanged();
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// 每次刷新都检测 IP，以应对 DHCP 续约等 IP 变更场景
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detectIpAddress();
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}
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void NetworkMonitorApplet::calculateSpeed()
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{
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qint64 currentRxBytes = getActiveRxBytes();
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qint64 currentTxBytes = getActiveTxBytes();
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if (m_firstUpdate) {
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m_firstUpdate = false;
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m_lastRxBytes = currentRxBytes;
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m_lastTxBytes = currentTxBytes;
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return;
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}
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// 计算速度（字节/秒）
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m_downloadSpeed = currentRxBytes - m_lastRxBytes;
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m_uploadSpeed = currentTxBytes - m_lastTxBytes;
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// 更新总量
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m_totalDownload = currentRxBytes;
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m_totalUpload = currentTxBytes;
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m_lastRxBytes = currentRxBytes;
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m_lastTxBytes = currentTxBytes;
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emit speedChanged();
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emit totalChanged();
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}
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void NetworkMonitorApplet::detectInterfaces()
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{
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QDir sysClass("/sys/class/net");
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if (!sysClass.exists()) return;
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QStringList entries = sysClass.entryList(QDir::Dirs | QDir::NoDotAndDotDot);
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m_interfaceList.clear();
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for (const QString &entry : entries) {
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// 过滤回环接口
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if (entry != "lo") {
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m_interfaceList << entry;
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}
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}
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m_ready = !m_interfaceList.isEmpty();
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emit interfacesChanged();
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emit readyChanged();
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}
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qint64 NetworkMonitorApplet::getActiveRxBytes() const
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{
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if (m_activeInterface.isEmpty() || !m_interfaces.contains(m_activeInterface)) {
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return 0;
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}
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return m_interfaces[m_activeInterface].rxBytes;
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}
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qint64 NetworkMonitorApplet::getActiveTxBytes() const
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{
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if (m_activeInterface.isEmpty() || !m_interfaces.contains(m_activeInterface)) {
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return 0;
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}
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return m_interfaces[m_activeInterface].txBytes;
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}
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// 检测活动接口的 IPv4 与 IPv6 地址
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// IPv4：跳过 loopback，取第一个
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// IPv6：跳过 loopback 和 link-local (fe80::)，取第一个全球地址
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// 任一地址变化时分别 emit 对应信号通知 QML 更新
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// 设计原因：DHCP 续约、网络切换、IPv6 SLAAC 等场景下地址可能变化，需持续检测
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void NetworkMonitorApplet::detectIpAddress()
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{
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QString newIp;
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QString newIpv6;
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if (!m_activeInterface.isEmpty()) {
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QNetworkInterface iface = QNetworkInterface::interfaceFromName(m_activeInterface);
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for (const QNetworkAddressEntry &entry : iface.addressEntries()) {
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// IPv4：跳过 loopback，取第一个
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if (entry.ip().protocol() == QAbstractSocket::IPv4Protocol
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&& !entry.ip().isLoopback()
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&& newIp.isEmpty()) {
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newIp = entry.ip().toString();
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}
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// IPv6：跳过 loopback 和 link-local (fe80::)，取第一个全球地址
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if (entry.ip().protocol() == QAbstractSocket::IPv6Protocol
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&& !entry.ip().isLoopback()
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&& !entry.ip().isLinkLocal()
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&& newIpv6.isEmpty()) {
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newIpv6 = entry.ip().toString();
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}
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}
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}
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if (m_ipAddress != newIp) {
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m_ipAddress = newIp;
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emit ipAddressChanged();
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}
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if (m_ipv6Address != newIpv6) {
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m_ipv6Address = newIpv6;
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emit ipv6AddressChanged();
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}
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}
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// 判断是否为物理网卡
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// 物理网卡前缀：无线 wlp/wlan/wifi，有线 enp/eth
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// 虚拟接口（Meta/tun/tap/docker/veth/br-）返回 false，
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// 用于自动选择时优先真实网卡而非代理 TUN 接口
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bool NetworkMonitorApplet::isPhysicalInterface(const QString &name) const
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{
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return name.startsWith("wlp") || name.startsWith("wlan")
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|| name.startsWith("enp") || name.startsWith("eth");
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}
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D_APPLET_CLASS(NetworkMonitorApplet)
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DS_END_NAMESPACE
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#include "networkmonitorapplet.moc"
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