平臺

RK3588 + Android 12

問題描述

ConnectivityService是Android系統中負責處理網絡連接的服務之一。它負責管理設備的網絡連接狀態，包括Wi-Fi、移動數據、藍牙等。
在Android系統中，ConnectivityService提供了一些關鍵功能，包括但不限于：

1. 網絡狀態監測： 它監測設備的網絡狀態，包括連接到的網絡類型（如Wi-Fi、移動數據）、網絡是否可用等。
2. 網絡類型切換： 當設備從一個網絡切換到另一個網絡時，ConnectivityService負責協調這個過程，以確保應用程序可以繼續正常工作。
3. 網絡連接管理： 它允許應用程序查詢當前網絡連接的狀態，并可以請求建立或中斷網絡連接。
4. 網絡通知： 它可以向應用程序發送廣播通知，以通知它們有關網絡狀態的變化。

本文主要記錄兩點:

1. Android 12 的ConnectivityService源碼路徑和機構的一些變化
2. Wifi連接中的"已連接到設備,但無法提供互聯網連接"問題.
   
   
   
   在連接到指定的WIFI熱點后, 有時候會顯示上面的提示信息, 大致的意思就是, 連上了但是上不了網

WIFI 設置

packages/apps/Settings/src/com/android/settings/network/NetworkProviderSettings.java

Can’t provide internet在哪里? 不在Settings 也不在 SettingsLib, 而是在WifiTrackerLib

frameworks/opt/net/wifi/libs/WifiTrackerLib/res/values/strings.xml

    <!-- Summary for connected wifi network without internet [CHAR LIMIT=NONE] --><string name="wifitrackerlib_wifi_connected_cannot_provide_internet">Connected to device. Can\'t provide internet.</string>

frameworks/opt/net/wifi/libs/WifiTrackerLib/src/com/android/wifitrackerlib/Utils.java
wifitrackerlib_wifi_connected_cannot_provide_internet

    static String getCurrentNetworkCapabilitiesInformation(Context context,NetworkCapabilities networkCapabilities) {if (context == null || networkCapabilities == null) {return "";}if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL)) {return context.getString(context.getResources().getIdentifier("network_available_sign_in", "string", "android"));}if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_PARTIAL_CONNECTIVITY)) {return context.getString(R.string.wifitrackerlib_wifi_limited_connection);}if (!networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)) {if (networkCapabilities.isPrivateDnsBroken()) {return context.getString(R.string.wifitrackerlib_private_dns_broken);}return context.getString(R.string.wifitrackerlib_wifi_connected_cannot_provide_internet);}return "";}

ConnectivityManager.java 有幾個, 需要注意不要改錯

frameworks/layoutlib/bridge/src/android/net/ConnectivityManager.java
packages/modules/Connectivity/core/java/android/net/ConnectivityManager.java
packages/modules/Connectivity/framework/src/android/net/ConnectivityManager.java

ConnectivityService.java 同樣有多個

packages/modules/Connectivity/service/src/com/android/server/ConnectivityService.java
packages/modules/Connectivity/services/core/java/com/android/server/ConnectivityService.java

如何單編譯ConnectivityService 注意, 使用的是service.

mmm packages/modules/Connectivity/service/:service-connectivity
# 將會生成文件:
out/target/product/rk3588_s/system/apex/com.android.tethering/javalib/service-connectivity.jar

替換主板中的文件并重啟即可

# 需注意,主板中有兩個同名文件:
#	/apex/com.android.tethering/javalib/service-connectivity.jar
#	/system/apex/com.android.tethering.inprocess/javalib/service-connectivity.jar
# 不要搞錯路徑
## root 和 remount 之后
adb push service-connectivity.jar /system/apex/com.android.tethering.inprocess/javalib/

????在 Android 源代碼中，com.android.tethering 通常用于處理網絡共享（Tethering）的功能。網絡共享允許設備通過不同的網絡接口（如移動數據、Wi-Fi或藍牙）與其他設備共享其網絡連接。

具體來說，com.android.tethering 是 Android 框架的一部分，負責實現和管理網絡共享的相關功能。這包括創建和管理 Wi-Fi 熱點、USB 網絡共享以及藍牙網絡共享等。

簡單整理下Wifi列表中連接狀態的數據傳遞:

修改

1. 修改認證地址
   先看一段LOG:

PROBE_DNS www.google.cn 5055ms OK 220.181.174.226
PROBE_DNS www.google.cn 5059ms OK 220.181.174.226
PROBE_HTTP http://www.google.cn/generate_204 time=126ms ret=204 request={Connection=[close], User-Agent=[Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.32 Safari/537.36]} headers={null=[HTTP/1.1 204 No Content], Connection=[close], Content-Length=[0], Cross-Origin-Resource-Policy=[cross-origin], Date=[Tue, 05 Dec 2023 01:21:40 GMT], X-Android-Received-Millis=[1701739300483], X-Android-Response-Source=[NETWORK 204], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1701739300402]}
PROBE_HTTPS https://www.google.cn/generate_204 time=284ms ret=204 request={Connection=[close], User-Agent=[Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.32 Safari/537.36]} headers={null=[HTTP/1.1 204 No Content], Alt-Svc=[h3=":443"; ma=2592000,h3-29=":443"; ma=2592000], Connection=[close], Content-Length=[0], Cross-Origin-Resource-Policy=[cross-origin], Date=[Tue, 05 Dec 2023 01:21:40 GMT], X-Android-Received-Millis=[1701739300641], X-Android-Response-Source=[NETWORK 204], X-Android-Selected-Protocol=[http/1.1], X-Android-Sent-Millis=[1701739300521]}
PROBE_FALLBACK http://www.google.com/gen_204 Probe failed with exception java.net.ConnectException: Failed to connect to www.google.com/4.78.139.54:80
PROBE_FALLBACK http://www.google.com/gen_204 Probe failed with exception java.net.SocketTimeoutException: failed to connect to www.google.com/31.13.94.37 (port 80) from /192.168.1.86 (port 51118) after 10000ms

packages/modules/NetworkStack/src/com/android/server/connectivity/NetworkMonitor.java

    @VisibleForTestingpublic NetworkMonitor(Context context, INetworkMonitorCallbacks cb, Network network,IpConnectivityLog logger, SharedLog validationLogs,@NonNull NetworkStackServiceManager serviceManager, Dependencies deps,@Nullable TcpSocketTracker tst) {// Add suffix indicating which NetworkMonitor we're talking about.super(TAG + "/" + network.toString());// ...mIsCaptivePortalCheckEnabled = getIsCaptivePortalCheckEnabled();mPrivateIpNoInternetEnabled = getIsPrivateIpNoInternetEnabled();mMetricsEnabled = deps.isFeatureEnabled(context, NAMESPACE_CONNECTIVITY,NetworkStackUtils.VALIDATION_METRICS_VERSION, true /* defaultEnabled */);mUseHttps = getUseHttpsValidation();mCaptivePortalUserAgent = getCaptivePortalUserAgent();mCaptivePortalHttpsUrls = makeCaptivePortalHttpsUrls();android.util.Log.d(TAG, "mCaptivePortalHttpsUrls[0]=" + mCaptivePortalHttpsUrls[0].toString());mCaptivePortalHttpUrls = makeCaptivePortalHttpUrls();mCaptivePortalFallbackUrls = makeCaptivePortalFallbackUrls();mCaptivePortalFallbackSpecs = makeCaptivePortalFallbackProbeSpecs();//....}private URL[] makeCaptivePortalHttpsUrls() {final URL testUrl = getTestUrl(TEST_CAPTIVE_PORTAL_HTTPS_URL);if (testUrl != null) return new URL[] { testUrl };final String firstUrl = getCaptivePortalServerHttpsUrl();try {final URL[] settingProviderUrls =combineCaptivePortalUrls(firstUrl, CAPTIVE_PORTAL_OTHER_HTTPS_URLS);// firstUrl will at least be default configuration, so default value in// getProbeUrlArrayConfig is actually never used.return getProbeUrlArrayConfig(settingProviderUrls,R.array.config_captive_portal_https_urls,DEFAULT_CAPTIVE_PORTAL_HTTPS_URLS, this::makeURL);} catch (Exception e) {// Don't let a misconfiguration bootloop the system.Log.e(TAG, "Error parsing configured https URLs", e);// Ensure URL aligned with legacy configuration.return new URL[]{makeURL(firstUrl)};}}private String getCaptivePortalServerHttpsUrl() {return getSettingFromResource(mCustomizedContext,R.string.config_captive_portal_https_url, CAPTIVE_PORTAL_HTTPS_URL,mCustomizedContext.getResources().getString(R.string.default_captive_portal_https_url));}

修改配置文件即可:

packages/modules/NetworkStack/res/values/config.xml

<!-- HTTP URL for network validation, to use for detecting captive portals. --><!-- default_captive_portal_http_url is not configured as overlayable soOEMs that wish to change captive_portal_http_url configuration mustdo so via configuring runtime resource overlay toconfig_captive_portal_http_url and *NOT* by changing or overlayingthis resource. It will break if the enforcement of overlayable starts.--><string name="default_captive_portal_http_url" translatable="false">http://connectivitycheck.gstatic.com/generate_204</string><!-- HTTPS URL for network validation, to use for confirming internet connectivity. --><!-- default_captive_portal_https_url is not configured as overlayable soOEMs that wish to change captive_portal_https_url configuration mustdo so via configuring runtime resource overlay toconfig_captive_portal_https_url and *NOT* by changing or overlayingthis resource. It will break if the enforcement of overlayable starts.--><string name="default_captive_portal_https_url" translatable="false">https://www.google.com/generate_204</string><!-- List of fallback URLs to use for detecting captive portals. --><!-- default_captive_portal_fallback_urls is not configured as overlayableso OEMs that wish to change captive_portal_fallback_urls configurationmust do so via configuring runtime resource overlay toconfig_captive_portal_fallback_urls and *NOT* by changing or overlayingthis resource. It will break if the enforcement of overlayable starts.--><string-array name="default_captive_portal_fallback_urls" translatable="false"><item>http://www.google.com/gen_204</item><item>http://play.googleapis.com/generate_204</item></string-array><!-- Configuration hooks for the above settings.Empty by default but may be overridden by RROs. --><integer name="config_captive_portal_dns_probe_timeout"></integer><!--suppress CheckTagEmptyBody: overlayable resource to use as configuration hook --><string name="config_captive_portal_http_url" translatable="false"></string><!--suppress CheckTagEmptyBody: overlayable resource to use as configuration hook --><string name="config_captive_portal_https_url" translatable="false"></string>

前面改了不生效, 注意:OVERLAY

device/rockchip/common/overlay/packages/modules/NetworkStack/res/values/config.xml

<string name="config_captive_portal_http_url" translatable="false">http://www.google.cn/generate_204</string>

編譯:mmm packages/modules/NetworkStack/:InProcessNetworkStack

還可以嘗試使用RRO的方式

vendor/rockchip/common/gms/RockchipNetworkStackConfigOverlay/res/values/config.xml

<string name="config_captive_portal_https_url" translatable="false">https://www.google.cn/generate_204</string>

2. 自動確認保持連接
   通知的發出:

showNotification tag=ConnectivityNotification:100 event=NO_INTERNET transport=WLAN name=XXXX highPriority=true

 private void showNetworkNotification(NetworkAgentInfo nai, NotificationType type) {final String action;final boolean highPriority;switch (type) {case NO_INTERNET:action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED;// High priority because it is only displayed for explicitly selected networks.highPriority = true;break;case PRIVATE_DNS_BROKEN:action = Settings.ACTION_WIRELESS_SETTINGS;// High priority because we should let user know why there is no internet.highPriority = true;break;case LOST_INTERNET:action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION;// High priority because it could help the user avoid unexpected data usage.highPriority = true;break;case PARTIAL_CONNECTIVITY:action = ConnectivityManager.ACTION_PROMPT_PARTIAL_CONNECTIVITY;// Don't bother the user with a high-priority notification if the network was not// explicitly selected by the user.highPriority = nai.networkAgentConfig.explicitlySelected;break;default:Log.wtf(TAG, "Unknown notification type " + type);return;}Intent intent = new Intent(action);if (type != NotificationType.PRIVATE_DNS_BROKEN) {intent.putExtra(ConnectivityManager.EXTRA_NETWORK, nai.network);intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);// Some OEMs have their own Settings package. Thus, need to get the current using// Settings package name instead of just use default name "com.android.settings".final String settingsPkgName = getSettingsPackageName(mContext.getPackageManager());intent.setClassName(settingsPkgName,settingsPkgName + ".wifi.WifiNoInternetDialog");}PendingIntent pendingIntent = PendingIntent.getActivity(mContext.createContextAsUser(UserHandle.CURRENT, 0 /* flags */),0 /* requestCode */,intent,PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_IMMUTABLE);mNotifier.showNotification(nai.network.getNetId(), type, nai, null, pendingIntent, highPriority);}

點擊通知后:

START u0 {act=android.net.action.PROMPT_UNVALIDATED flg=0x10000000 cmp=com.android.settings/.wifi.WifiNoInternetDialog (has extras)} from uid 1000

看Settings的清單:

packages/apps/Settings/AndroidManifest.xml

        <activity android:name=".wifi.WifiNoInternetDialog"android:clearTaskOnLaunch="true"android:excludeFromRecents="true"android:exported="true"android:permission="android.permission.NETWORK_STACK"android:theme="@*android:style/Theme.DeviceDefault.Dialog.Alert.DayNight"><!-- TODO: Consider removing below two intent filters.It seems like below two intent filters can be removed because when the notificationis clicked, this activity will be launched anyway. --><intent-filter><action android:name="android.net.action.PROMPT_UNVALIDATED" /><category android:name="android.intent.category.DEFAULT" /></intent-filter><intent-filter><action android:name="android.net.action.PROMPT_LOST_VALIDATION" /><category android:name="android.intent.category.DEFAULT" /></intent-filter><meta-data android:name="com.android.settings.PRIMARY_PROFILE_CONTROLLED"android:value="true" /></activity>

packages/apps/Settings/src/com/android/settings/wifi/WifiNoInternetDialog.java

    @Overridepublic void onClick(DialogInterface dialog, int which) {if (which != BUTTON_NEGATIVE && which != BUTTON_POSITIVE) return;final boolean always = mAlwaysAllow.isChecked();final String what, action;mButtonClicked = true;if (ACTION_PROMPT_UNVALIDATED.equals(mAction)) {what = "NO_INTERNET";final boolean accept = (which == BUTTON_POSITIVE);action = (accept ? "Connect" : "Ignore");mCM.setAcceptUnvalidated(mNetwork, accept, always);} else if (ACTION_PROMPT_PARTIAL_CONNECTIVITY.equals(mAction)) {what = "PARTIAL_CONNECTIVITY";final boolean accept = (which == BUTTON_POSITIVE);action = (accept ? "Connect" : "Ignore");mCM.setAcceptPartialConnectivity(mNetwork, accept, always);} else {what = "LOST_INTERNET";final boolean avoid = (which == BUTTON_POSITIVE);action = (avoid ? "Switch away" : "Get stuck");if (always) {Settings.Global.putString(mAlertParams.mContext.getContentResolver(),Settings.Global.NETWORK_AVOID_BAD_WIFI, avoid ? "1" : "0");} else if (avoid) {mCM.setAvoidUnvalidated(mNetwork);}}Log.d(TAG, what + ": " + action +  " network=" + mNetwork +(always ? " and remember" : ""));}

packages/modules/Connectivity/service/src/com/android/server/ConnectivityService.java

    @Overridepublic void setAcceptUnvalidated(Network network, boolean accept, boolean always) {enforceNetworkStackSettingsOrSetup();mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED,encodeBool(accept), encodeBool(always), network));}private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) {if (DBG) log("handleSetAcceptUnvalidated network=" + network +" accept=" + accept + " always=" + always);NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);if (nai == null) {// Nothing to do.return;}if (nai.everValidated) {// The network validated while the dialog box was up. Take no action.return;}if (!nai.networkAgentConfig.explicitlySelected) {Log.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network");}if (accept != nai.networkAgentConfig.acceptUnvalidated) {nai.networkAgentConfig.acceptUnvalidated = accept;// If network becomes partial connectivity and user already accepted to use this// network, we should respect the user's option and don't need to popup the// PARTIAL_CONNECTIVITY notification to user again.nai.networkAgentConfig.acceptPartialConnectivity = accept;nai.updateScoreForNetworkAgentUpdate();rematchAllNetworksAndRequests();}if (always) {nai.onSaveAcceptUnvalidated(accept);}if (!accept) {// Tell the NetworkAgent to not automatically reconnect to the network.nai.onPreventAutomaticReconnect();// Teardown the network.teardownUnneededNetwork(nai);}}

增加屬性控制, 不發送通知, 并執行保持連接:

    private void handlePromptUnvalidated(Network network) {//Force keep-connect for networkif("1".equals(android.os.SystemProperties.get("persist.sys.keepNetworkConnect"))){handleSetAcceptUnvalidated(network, true, true);return;}}

3. 關閉網絡測試

packages/modules/NetworkStack/src/com/android/server/connectivity/NetworkMonitor.java

//    public static final String CAPTIVE_PORTAL_MODE = "captive_portal_mode";
//    public static final int CAPTIVE_PORTAL_MODE_IGNORE = 0;
//    public static final int CAPTIVE_PORTAL_MODE_PROMPT = 1;private boolean getIsCaptivePortalCheckEnabled() {String symbol = CAPTIVE_PORTAL_MODE;int defaultValue = CAPTIVE_PORTAL_MODE_PROMPT;int mode = mDependencies.getSetting(mContext, symbol, defaultValue);return mode != CAPTIVE_PORTAL_MODE_IGNORE;}public static class Dependencies {//..../*** Get the value of a global integer setting.* @param symbol Name of the setting* @param defaultValue Value to return if the setting is not defined.*/public int getSetting(Context context, String symbol, int defaultValue) {return Settings.Global.getInt(context.getContentResolver(), symbol, defaultValue);}

adb shell settings put global captive_portal_mode 0

參考

ConnectivityService處理wifi連接
android 網絡連接受限解決
android 網絡重新連接時BaseActivity處理 android網絡連接受限
android wif 去掉 雙引號 原生安卓去掉wifi叉號
AndroidQ RRO(Runtime Resource Overlay)機制（1）