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| 1 | +// SPDX-FileCopyrightText: 2026 UnionTech Software Technology Co., Ltd. |
| 2 | +// |
| 3 | +// SPDX-License-Identifier: LGPL-3.0-or-later |
| 4 | + |
| 5 | +#include "internetchecker.h" |
| 6 | + |
| 7 | +#include "httpmanager.h" |
| 8 | +#include "settingconfig.h" |
| 9 | +#include "constants.h" |
| 10 | + |
| 11 | +#include <QDebug> |
| 12 | +#include <QTimer> |
| 13 | +#include <QThread> |
| 14 | +#include <QElapsedTimer> |
| 15 | + |
| 16 | +#include <NetworkManagerQt/Manager> |
| 17 | +#include <NetworkManagerQt/ActiveConnection> |
| 18 | +#include <NetworkManagerQt/Ipv4Setting> |
| 19 | +#include <NetworkManagerQt/Ipv6Setting> |
| 20 | +#include <NetworkManagerQt/Settings> |
| 21 | + |
| 22 | +using namespace network::systemservice; |
| 23 | + |
| 24 | +InternetChecker::InternetChecker(QObject *parent) |
| 25 | + : QObject(parent) |
| 26 | + , m_tryIndex(0) |
| 27 | + , m_switchTimer(nullptr) |
| 28 | + , m_isSwitching(false) |
| 29 | +{ |
| 30 | + connect(NetworkManager::notifier(), &NetworkManager::Notifier::primaryConnectionChanged, |
| 31 | + this, &InternetChecker::onPrimaryConnectionChanged); |
| 32 | +} |
| 33 | + |
| 34 | +InternetChecker::~InternetChecker() |
| 35 | +{ |
| 36 | + if (m_switchTimer) { |
| 37 | + m_switchTimer->stop(); |
| 38 | + m_switchTimer->deleteLater(); |
| 39 | + } |
| 40 | +} |
| 41 | + |
| 42 | +void InternetChecker::resetAllNeverDefault() const |
| 43 | +{ |
| 44 | + const NetworkManager::Device::List devices = NetworkManager::networkInterfaces(); |
| 45 | + for (const NetworkManager::Device::Ptr &device : devices) { |
| 46 | + NetworkManager::ActiveConnection::Ptr activeConn = device->activeConnection(); |
| 47 | + if (!activeConn.isNull()) |
| 48 | + setConnectionNeverDefault(activeConn->connection(), device, false); |
| 49 | + } |
| 50 | +} |
| 51 | + |
| 52 | +bool InternetChecker::setConnectionNeverDefault(const NetworkManager::Connection::Ptr &conn, |
| 53 | + const NetworkManager::Device::Ptr &device, |
| 54 | + bool neverDefault) const |
| 55 | +{ |
| 56 | + if (conn.isNull()) |
| 57 | + return false; |
| 58 | + |
| 59 | + NMVariantMapMap settingsMap; |
| 60 | + bool changed = false; |
| 61 | + |
| 62 | + NetworkManager::Setting::Ptr ipv4Setting = conn->settings()->setting(NetworkManager::Setting::Ipv4); |
| 63 | + if (ipv4Setting) { |
| 64 | + NetworkManager::Ipv4Setting::Ptr ipv4 = ipv4Setting.dynamicCast<NetworkManager::Ipv4Setting>(); |
| 65 | + if (ipv4->neverDefault() != neverDefault) { |
| 66 | + ipv4->setNeverDefault(neverDefault); |
| 67 | + settingsMap.insert(ipv4->name(), ipv4->toMap()); |
| 68 | + changed = true; |
| 69 | + } |
| 70 | + } |
| 71 | + NetworkManager::Setting::Ptr ipv6Setting = conn->settings()->setting(NetworkManager::Setting::Ipv6); |
| 72 | + if (ipv6Setting) { |
| 73 | + NetworkManager::Ipv6Setting::Ptr ipv6 = ipv6Setting.dynamicCast<NetworkManager::Ipv6Setting>(); |
| 74 | + if (ipv6->neverDefault() != neverDefault) { |
| 75 | + ipv6->setNeverDefault(neverDefault); |
| 76 | + settingsMap.insert(ipv6->name(), ipv6->toMap()); |
| 77 | + changed = true; |
| 78 | + } |
| 79 | + } |
| 80 | + if (changed) { |
| 81 | + conn->updateUnsaved(settingsMap); |
| 82 | + if (!device.isNull()) |
| 83 | + device->reapplyConnection(conn->settings()->toMap(), 0, 0); |
| 84 | + qCInfo(DSM) << "Set connection" << conn->name() << "never-default to" << neverDefault; |
| 85 | + } |
| 86 | + return changed; |
| 87 | +} |
| 88 | + |
| 89 | +void InternetChecker::setPrimaryDeviceNeverDefault(bool neverDefault) const |
| 90 | +{ |
| 91 | + NetworkManager::ActiveConnection::Ptr primaryConn = NetworkManager::primaryConnection(); |
| 92 | + if (primaryConn.isNull()) |
| 93 | + return; |
| 94 | + |
| 95 | + const QStringList deviceUnis = primaryConn->devices(); |
| 96 | + for (const QString &uni : deviceUnis) { |
| 97 | + NetworkManager::Device::Ptr device = NetworkManager::findNetworkInterface(uni); |
| 98 | + if (!device.isNull()) |
| 99 | + changeDeviceNeverDefault(device, neverDefault); |
| 100 | + } |
| 101 | +} |
| 102 | + |
| 103 | +bool InternetChecker::checkInternetAccessible() const |
| 104 | +{ |
| 105 | + bool timedOut = false; |
| 106 | + return checkInternetAccessible(0, timedOut); |
| 107 | +} |
| 108 | + |
| 109 | +bool InternetChecker::checkInternetAccessible(int timeoutSec, bool &timedOut) const |
| 110 | +{ |
| 111 | + timedOut = false; |
| 112 | + |
| 113 | + const QStringList checkUrls = SettingConfig::instance()->networkCheckerUrls(); |
| 114 | + for (const QString &url : checkUrls) { |
| 115 | + network::service::HttpManager http; |
| 116 | + network::service::HttpReply *httpReply = (timeoutSec > 0) |
| 117 | + ? http.get(url, timeoutSec) |
| 118 | + : http.get(url); |
| 119 | + if (httpReply->httpCode() != 0) { |
| 120 | + return true; |
| 121 | + } |
| 122 | + if (httpReply->isTimeout()) { |
| 123 | + timedOut = true; |
| 124 | + break; |
| 125 | + } |
| 126 | + } |
| 127 | + return false; |
| 128 | +} |
| 129 | + |
| 130 | +bool InternetChecker::checkInternetAccessibleWithRetry(int maxRetry) const |
| 131 | +{ |
| 132 | + for (int i = 0; i < maxRetry; ++i) { |
| 133 | + // 每次检测前等待1秒，让NM路由表和DHCP先稳定 |
| 134 | + QThread::sleep(1); |
| 135 | + bool timedOut = false; |
| 136 | + // 首次使用20秒超时，避免在无网线路由器的环境中长时间阻塞 |
| 137 | + QElapsedTimer timer; |
| 138 | + timer.start(); |
| 139 | + if (checkInternetAccessible((i == 0) ? 20 : 0, timedOut)) { |
| 140 | + return true; |
| 141 | + } |
| 142 | + if (timedOut) { |
| 143 | + qCDebug(DSM) << "Request timed out after" << timer.elapsed() << "ms, skipping retries"; |
| 144 | + return false; |
| 145 | + } |
| 146 | + } |
| 147 | + return false; |
| 148 | +} |
| 149 | + |
| 150 | +void InternetChecker::changeDeviceNeverDefault(const NetworkManager::Device::Ptr &device, bool neverDefault) const |
| 151 | +{ |
| 152 | + if (device.isNull()) |
| 153 | + return; |
| 154 | + |
| 155 | + NetworkManager::ActiveConnection::Ptr activeConn = device->activeConnection(); |
| 156 | + if (activeConn.isNull()) |
| 157 | + return; |
| 158 | + |
| 159 | + NetworkManager::Connection::Ptr conn = activeConn->connection(); |
| 160 | + setConnectionNeverDefault(conn, device, neverDefault); |
| 161 | +} |
| 162 | + |
| 163 | +void InternetChecker::onPrimaryConnectionChanged(const QString &uni) |
| 164 | +{ |
| 165 | + Q_UNUSED(uni) |
| 166 | + |
| 167 | + // 停止超时定时器 |
| 168 | + if (m_switchTimer) { |
| 169 | + m_switchTimer->stop(); |
| 170 | + } |
| 171 | + |
| 172 | + qCInfo(DSM) << "Primary connection changed:" << uni; |
| 173 | + // NM已切换主连接，通过默认路由检测整体是否可以上网（重试3次，等待DHCP/路由生效） |
| 174 | + if (checkInternetAccessibleWithRetry(3)) { |
| 175 | + qCInfo(DSM) << "Found accessible device, switching done"; |
| 176 | + // 当前主设备已经是能上网的，它的never-default本来就是false，无需额外操作 |
| 177 | + // 此处不能恢复其他设备never default, 因为如果恢复后，NM 内部会根据每个设备的metric值又将主链接设置回去了，导致无法上网 |
| 178 | + m_tryIndex = 0; |
| 179 | + m_isSwitching = false; |
| 180 | + emit switchSuccess(); |
| 181 | + } else if (m_tryIndex < m_tryDevices.size()) { |
| 182 | + // 当前设备不能上网，把当前主设备的never-default设为true，让下一个设备接住默认路由 |
| 183 | + qCDebug(DSM) << "Current device still cannot access internet, trying next device, index:" << m_tryIndex; |
| 184 | + setPrimaryDeviceNeverDefault(true); |
| 185 | + NetworkManager::Device::Ptr nextDevice = m_tryDevices.at(m_tryIndex); |
| 186 | + changeDeviceNeverDefault(nextDevice, false); |
| 187 | + m_tryIndex++; |
| 188 | + } else { |
| 189 | + // 所有设备都尝试过了，全部恢复 |
| 190 | + qCInfo(DSM) << "All devices tried, none can access internet, resetting all never-default"; |
| 191 | + resetAllNeverDefault(); |
| 192 | + m_tryIndex = 0; |
| 193 | + m_isSwitching = false; |
| 194 | + emit switchFailed(); |
| 195 | + } |
| 196 | +} |
| 197 | + |
| 198 | +void InternetChecker::onPrimaryConnectionTimeout() |
| 199 | +{ |
| 200 | + // NM在超时时间内没有切换主连接，可能是只有一个可切换的设备 |
| 201 | + qCWarning(DSM) << "PrimaryConnection change timeout, trying next device manually, index:" << m_tryIndex; |
| 202 | + if (m_tryIndex < m_tryDevices.size()) { |
| 203 | + // 把当前主设备的never-default设为true，让下一个设备接住默认路由 |
| 204 | + setPrimaryDeviceNeverDefault(true); |
| 205 | + NetworkManager::Device::Ptr nextDevice = m_tryDevices.at(m_tryIndex); |
| 206 | + changeDeviceNeverDefault(nextDevice, false); |
| 207 | + m_tryIndex++; |
| 208 | + // 重置超时定时器 |
| 209 | + m_switchTimer->start(5000); |
| 210 | + } else { |
| 211 | + resetAllNeverDefault(); |
| 212 | + m_tryIndex = 0; |
| 213 | + m_isSwitching = false; |
| 214 | + emit switchFailed(); |
| 215 | + } |
| 216 | +} |
| 217 | + |
| 218 | +void InternetChecker::switchInternetAccess() |
| 219 | +{ |
| 220 | + // 正在切换中，忽略新的切换请求 |
| 221 | + if (m_isSwitching) { |
| 222 | + qCDebug(DSM) << "current is switching"; |
| 223 | + return; |
| 224 | + } |
| 225 | + |
| 226 | + m_isSwitching = true; |
| 227 | + NetworkManager::Device::List availableDevice; |
| 228 | + NetworkManager::Device::List devices = NetworkManager::networkInterfaces(); |
| 229 | + for (const NetworkManager::Device::Ptr &device : devices) { |
| 230 | + if (device->type() != NetworkManager::Device::Type::Ethernet |
| 231 | + && device->type() != NetworkManager::Device::Type::Wifi) |
| 232 | + continue; |
| 233 | + if (device->state() != NetworkManager::Device::State::Activated) |
| 234 | + continue; |
| 235 | + |
| 236 | + availableDevice << device; |
| 237 | + } |
| 238 | + |
| 239 | + if (availableDevice.size() <= 1) { |
| 240 | + qCDebug(DSM) << "only one available device,it will reset all never default"; |
| 241 | + resetAllNeverDefault(); |
| 242 | + m_isSwitching = false; |
| 243 | + return; |
| 244 | + } |
| 245 | + |
| 246 | + NetworkManager::ActiveConnection::Ptr primaryConnection = NetworkManager::primaryConnection(); |
| 247 | + if (primaryConnection.isNull()) { |
| 248 | + qCWarning(DSM) << "primary connection is null, it will reset all never default"; |
| 249 | + resetAllNeverDefault(); |
| 250 | + m_isSwitching = false; |
| 251 | + return; |
| 252 | + } |
| 253 | + |
| 254 | + // 找到当前主连接使用的网卡 |
| 255 | + QStringList primaryDeviceUnis = primaryConnection->devices(); |
| 256 | + NetworkManager::Device::Ptr primaryDevice; |
| 257 | + for (const NetworkManager::Device::Ptr &device : availableDevice) { |
| 258 | + if (primaryDeviceUnis.contains(device->uni())) { |
| 259 | + primaryDevice = device; |
| 260 | + qWarning() << "get primary device: " << primaryDevice->interfaceName(); |
| 261 | + break; |
| 262 | + } |
| 263 | + } |
| 264 | + |
| 265 | + if (primaryDevice.isNull()) { |
| 266 | + qWarning() << "primary device is null"; |
| 267 | + resetAllNeverDefault(); |
| 268 | + m_isSwitching = false; |
| 269 | + return; |
| 270 | + } |
| 271 | + |
| 272 | + // 保存需要遍历的设备列表（排除当前主设备） |
| 273 | + m_tryDevices.clear(); |
| 274 | + int primaryIdx = availableDevice.indexOf(primaryDevice); |
| 275 | + for (int i = 1; i < availableDevice.size(); ++i) { |
| 276 | + m_tryDevices << availableDevice.at((primaryIdx + i) % availableDevice.size()); |
| 277 | + } |
| 278 | + |
| 279 | + if (m_tryDevices.isEmpty()) { |
| 280 | + qCWarning(DSM) << "try device is empty"; |
| 281 | + resetAllNeverDefault(); |
| 282 | + m_isSwitching = false; |
| 283 | + return; |
| 284 | + } |
| 285 | + |
| 286 | + // 先将第一个候选设备的never-default恢复为false，确保它能接住默认路由 |
| 287 | + changeDeviceNeverDefault(m_tryDevices.first(), false); |
| 288 | + changeDeviceNeverDefault(primaryDevice, true); |
| 289 | + m_tryIndex = 1; |
| 290 | + |
| 291 | + // 设置超时定时器，防止NM没有触发信号时卡住 |
| 292 | + if (!m_switchTimer) { |
| 293 | + m_switchTimer = new QTimer(this); |
| 294 | + m_switchTimer->setSingleShot(true); |
| 295 | + connect(m_switchTimer, &QTimer::timeout, this, &InternetChecker::onPrimaryConnectionTimeout); |
| 296 | + } |
| 297 | + m_switchTimer->start(5000); |
| 298 | +} |
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