New Settings symbols for captive portal detection am: 92eb22fdd2 (9cd1a356) · Commits · e / os / android_frameworks_base

core/java/android/provider/Settings.java

+33 −0

Original line number	Diff line number	Diff line
		@@ -7997,11 +7997,36 @@ public final class Settings {
		/**
		* The server used for captive portal detection upon a new conection. A
		* 204 response code from the server is used for validation.
		* TODO: remove this deprecated symbol.
		*
		* @hide
		*/
		public static final String CAPTIVE_PORTAL_SERVER = "captive_portal_server";

		/**
		* The URL used for HTTPS captive portal detection upon a new connection.
		* A 204 response code from the server is used for validation.
		*
		* @hide
		*/
		public static final String CAPTIVE_PORTAL_HTTPS_URL = "captive_portal_https_url";

		/**
		* The URL used for HTTP captive portal detection upon a new connection.
		* A 204 response code from the server is used for validation.
		*
		* @hide
		*/
		public static final String CAPTIVE_PORTAL_HTTP_URL = "captive_portal_http_url";

		/**
		* The URL used for fallback HTTP captive portal detection when previous HTTP
		* and HTTPS captive portal detection attemps did not return a conclusive answer.
		*
		* @hide
		*/
		public static final String CAPTIVE_PORTAL_FALLBACK_URL = "captive_portal_fallback_url";

		/**
		* Whether to use HTTPS for network validation. This is enabled by default and the setting
		* needs to be set to 0 to disable it. This setting is a misnomer because captive portals
		@@ -8011,6 +8036,14 @@ public final class Settings {
		*/
		public static final String CAPTIVE_PORTAL_USE_HTTPS = "captive_portal_use_https";

		/**
		* Which User-Agent string to use in the header of the captive portal detection probes.
		* The User-Agent field is unset when this setting has no value (HttpUrlConnection default).
		*
		* @hide
		*/
		public static final String CAPTIVE_PORTAL_USER_AGENT = "captive_portal_user_agent";

		/**
		* Whether network service discovery is enabled.
		*

services/core/java/com/android/server/ConnectivityService.java

+1 −1

Original line number	Diff line number	Diff line
		@@ -5489,7 +5489,7 @@ public class ConnectivityService extends IConnectivityManager.Stub

		@Override
		public String getCaptivePortalServerUrl() {
		return NetworkMonitor.getCaptivePortalServerUrl(mContext);
		return NetworkMonitor.getCaptivePortalServerHttpUrl(mContext);
		}

		@Override

services/core/java/com/android/server/connectivity/NetworkMonitor.java

+53 −21

Original line number	Diff line number	Diff line
		@@ -79,11 +79,20 @@ import java.util.concurrent.TimeUnit;
		* {@hide}
		*/
		public class NetworkMonitor extends StateMachine {
		private static final boolean DBG = false;
		private static final String TAG = NetworkMonitor.class.getSimpleName();
		private static final String DEFAULT_SERVER = "connectivitycheck.gstatic.com";
		private static final boolean DBG = false;

		// Default urls for captive portal detection probes
		private static final String DEFAULT_HTTPS_URL =
		"https://connectivitycheck.gstatic.com/generate_204";
		private static final String DEFAULT_HTTP_URL =
		"http://connectivitycheck.gstatic.com/generate_204";
		private static final String DEFAULT_FALLBACK_URL = null;
		private static final String DEFAULT_USER_AGENT = null;

		private static final int SOCKET_TIMEOUT_MS = 10000;
		private static final int PROBE_TIMEOUT_MS = 3000;

		public static final String ACTION_NETWORK_CONDITIONS_MEASURED =
		"android.net.conn.NETWORK_CONDITIONS_MEASURED";
		public static final String EXTRA_CONNECTIVITY_TYPE = "extra_connectivity_type";
		@@ -596,22 +605,33 @@ public class NetworkMonitor extends StateMachine {
		}
		}

		private static String getCaptivePortalServerUrl(Context context, boolean isHttps) {
		String server = Settings.Global.getString(context.getContentResolver(),
		Settings.Global.CAPTIVE_PORTAL_SERVER);
		if (server == null) server = DEFAULT_SERVER;
		return (isHttps ? "https" : "http") + "://" + server + "/generate_204";
		private static String getCaptivePortalServerHttpsUrl(Context context) {
		return getSetting(context, Settings.Global.CAPTIVE_PORTAL_HTTPS_URL, DEFAULT_HTTPS_URL);
		}

		public static String getCaptivePortalServerHttpUrl(Context context) {
		return getSetting(context, Settings.Global.CAPTIVE_PORTAL_HTTP_URL, DEFAULT_HTTP_URL);
		}

		private static String getCaptivePortalFallbackUrl(Context context) {
		return getSetting(context,
		Settings.Global.CAPTIVE_PORTAL_FALLBACK_URL, DEFAULT_FALLBACK_URL);
		}

		public static String getCaptivePortalServerUrl(Context context) {
		return getCaptivePortalServerUrl(context, false);
		private static String getCaptivePortalUserAgent(Context context) {
		return getSetting(context, Settings.Global.CAPTIVE_PORTAL_USER_AGENT, DEFAULT_USER_AGENT);
		}

		private static String getSetting(Context context, String symbol, String defaultValue) {
		final String value = Settings.Global.getString(context.getContentResolver(), symbol);
		return value != null ? value : defaultValue;
		}

		@VisibleForTesting
		protected CaptivePortalProbeResult isCaptivePortal() {
		if (!mIsCaptivePortalCheckEnabled) return new CaptivePortalProbeResult(204);

		URL pacUrl = null, httpUrl = null, httpsUrl = null;
		URL pacUrl = null, httpsUrl = null, httpUrl = null, fallbackUrl = null;

		// On networks with a PAC instead of fetching a URL that should result in a 204
		// response, we instead simply fetch the PAC script. This is done for a few reasons:
		@@ -632,20 +652,17 @@ public class NetworkMonitor extends StateMachine {
		// results for network validation.
		final ProxyInfo proxyInfo = mNetworkAgentInfo.linkProperties.getHttpProxy();
		if (proxyInfo != null && !Uri.EMPTY.equals(proxyInfo.getPacFileUrl())) {
		try {
		pacUrl = new URL(proxyInfo.getPacFileUrl().toString());
		} catch (MalformedURLException e) {
		validationLog("Invalid PAC URL: " + proxyInfo.getPacFileUrl().toString());
		pacUrl = makeURL(proxyInfo.getPacFileUrl().toString());
		if (pacUrl == null) {
		return CaptivePortalProbeResult.FAILED;
		}
		}

		if (pacUrl == null) {
		try {
		httpUrl = new URL(getCaptivePortalServerUrl(mContext, false));
		httpsUrl = new URL(getCaptivePortalServerUrl(mContext, true));
		} catch (MalformedURLException e) {
		validationLog("Bad validation URL: " + getCaptivePortalServerUrl(mContext, false));
		httpsUrl = makeURL(getCaptivePortalServerHttpsUrl(mContext));
		httpUrl = makeURL(getCaptivePortalServerHttpUrl(mContext));
		fallbackUrl = makeURL(getCaptivePortalFallbackUrl(mContext));
		if (httpUrl == null \|\| httpsUrl == null) {
		return CaptivePortalProbeResult.FAILED;
		}
		}
		@@ -691,7 +708,7 @@ public class NetworkMonitor extends StateMachine {
		if (pacUrl != null) {
		result = sendHttpProbe(pacUrl, ValidationProbeEvent.PROBE_PAC);
		} else if (mUseHttps) {
		result = sendParallelHttpProbes(httpsUrl, httpUrl, null);
		result = sendParallelHttpProbes(httpsUrl, httpUrl, fallbackUrl);
		} else {
		result = sendHttpProbe(httpUrl, ValidationProbeEvent.PROBE_HTTP);
		}
		@@ -721,6 +738,10 @@ public class NetworkMonitor extends StateMachine {
		urlConnection.setConnectTimeout(SOCKET_TIMEOUT_MS);
		urlConnection.setReadTimeout(SOCKET_TIMEOUT_MS);
		urlConnection.setUseCaches(false);
		final String userAgent = getCaptivePortalUserAgent(mContext);
		if (userAgent != null) {
		urlConnection.setRequestProperty("User-Agent", userAgent);
		}

		// Time how long it takes to get a response to our request
		long requestTimestamp = SystemClock.elapsedRealtime();
		@@ -846,6 +867,17 @@ public class NetworkMonitor extends StateMachine {
		return httpsProbe.result();
		}

		private URL makeURL(String url) {
		if (url != null) {
		try {
		return new URL(url);
		} catch (MalformedURLException e) {
		validationLog("Bad URL: " + url);
		}
		}
		return null;
		}

		/**
		* @param responseReceived - whether or not we received a valid HTTP response to our request.
		* If false, isCaptivePortal and responseTimestampMs are ignored