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Commit 2877796f authored by Remi NGUYEN VAN's avatar Remi NGUYEN VAN Committed by android-build-merger
Browse files

Merge "Expose captive portal urls for configuration" 

am: 7bb487a5

Change-Id: If5970fdafa7c624855ef9d29921542e2fb6fdfa0
parents 2beb5fa6 7bb487a5

core/res/res/values/config.xml

+5 −4
Original line number Diff line number Diff line
@@ -302,14 +302,15 @@ 
         Settings.Global.NETWORK_AVOID_BAD_WIFI. This is the default value of that setting. -->

    <integer translatable="false" name="config_networkAvoidBadWifi">1</integer>



    <!-- The URL returned by ConnectivityManager#getCaptivePortalServerUrl. The actual returned

         value is controlled by Settings.Global.CAPTIVE_PORTAL_HTTP_URL. This is the default value

         used if that setting is unset.

    <!-- Configuration hook for the URL returned by ConnectivityManager#getCaptivePortalServerUrl.

         If empty, the returned value is controlled by Settings.Global.CAPTIVE_PORTAL_HTTP_URL,

         and if that value is empty, the framework will use a hard-coded default.

         This is *NOT* a URL that will always be used by the system network validation to detect

         captive portals: NetworkMonitor may use different strategies and will not necessarily use

         this URL. NetworkMonitor behaviour should be configured with NetworkStack resource overlays

         instead. -->

    <string translatable="false" name="config_networkDefaultCaptivePortalServerUrl">http://connectivitycheck.gstatic.com/generate_204</string>

    <!--suppress CheckTagEmptyBody -->

    <string translatable="false" name="config_networkCaptivePortalServerUrl"></string>



    <!-- If the hardware supports specially marking packets that caused a wakeup of the

         main CPU, set this value to the mark used. -->

core/res/res/values/symbols.xml

+1 −1
Original line number Diff line number Diff line
@@ -1945,7 +1945,7 @@ 
  <java-symbol type="integer" name="config_networkNotifySwitchType" />

  <java-symbol type="array" name="config_networkNotifySwitches" />

  <java-symbol type="integer" name="config_networkAvoidBadWifi" />

  <java-symbol type="string" name="config_networkDefaultCaptivePortalServerUrl" />

  <java-symbol type="string" name="config_networkCaptivePortalServerUrl" />

  <java-symbol type="integer" name="config_networkWakeupPacketMark" />

  <java-symbol type="integer" name="config_networkWakeupPacketMask" />

  <java-symbol type="bool" name="config_apfDrop802_3Frames" />

packages/NetworkStack/Android.bp

+1 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ android_library { 
        ":services-networkstack-shared-srcs",

    ],

    static_libs: [

        "androidx.annotation_annotation",

        "ipmemorystore-client",

        "netd_aidl_interface-java",

        "networkstack-aidl-interfaces-java",

packages/NetworkStack/res/values/config.xml

+35 −2
Original line number Diff line number Diff line 
<?xml version="1.0" encoding="utf-8"?>

<resources>

    <!-- Captive portal http url -->

    <string name="config_captive_portal_http_url" translatable="false">http://connectivitycheck.gstatic.com/generate_204</string>

    <!--

    OEMs that wish to change the below settings must do so via a runtime resource overlay package

    and *NOT* by changing this file. This file is part of the NetworkStack mainline module.

    The overlays must apply to the config_* values, not the default_* values. The default_*

    values are meant to be the default when no other configuration is specified.

    -->



    <!-- HTTP URL for network validation, to use for detecting captive portals. -->

    <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. -->

    <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. -->

    <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>



    <!-- List of fallback probe specs to use for detecting captive portals.

         This is an alternative to fallback URLs that provides more flexibility on detection rules.

         Empty, so unused by default. -->

    <string-array name="default_captive_portal_fallback_probe_specs" translatable="false">

    </string-array>



    <!-- Configuration hooks for the above settings.

         Empty by default but may be overridden by RROs. -->

    <!--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>

    <string-array name="config_captive_portal_fallback_urls" translatable="false">

    </string-array>

    <string-array name="config_captive_portal_fallback_probe_specs" translatable="false">

    </string-array>

</resources>
 
 No newline at end of file

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

+124 −52
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ import static android.net.INetworkMonitor.NETWORK_TEST_RESULT_PARTIAL_CONNECTIVI 
import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED;

import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;

import static android.net.NetworkCapabilities.TRANSPORT_WIFI;

import static android.net.captiveportal.CaptivePortalProbeSpec.parseCaptivePortalProbeSpecs;

import static android.net.metrics.ValidationProbeEvent.DNS_FAILURE;

import static android.net.metrics.ValidationProbeEvent.DNS_SUCCESS;

import static android.net.metrics.ValidationProbeEvent.PROBE_FALLBACK;
@@ -42,6 +43,7 @@ import android.content.BroadcastReceiver; 
import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.content.res.Resources;

import android.net.ConnectivityManager;

import android.net.INetworkMonitor;

import android.net.INetworkMonitorCallbacks;
@@ -80,6 +82,9 @@ import android.text.TextUtils; 
import android.util.Log;

import android.util.Pair;



import androidx.annotation.ArrayRes;

import androidx.annotation.StringRes;



import com.android.internal.annotations.VisibleForTesting;

import com.android.internal.util.RingBufferIndices;

import com.android.internal.util.State;
@@ -94,7 +99,6 @@ import java.net.URL; 
import java.net.UnknownHostException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.Collections;

import java.util.LinkedHashMap;

import java.util.List;
@@ -102,6 +106,7 @@ import java.util.Random; 
import java.util.UUID;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.TimeUnit;

import java.util.function.Function;



/**

 * {@hide}
@@ -111,15 +116,6 @@ public class NetworkMonitor extends StateMachine { 
    private static final boolean DBG  = true;

    private static final boolean VDBG = false;

    private static final boolean VDBG_STALL = Log.isLoggable(TAG, Log.DEBUG);

    // TODO: use another permission for CaptivePortalLoginActivity once it has its own certificate

    private static final String PERMISSION_NETWORK_SETTINGS = "android.permission.NETWORK_SETTINGS";

    // Default configuration values for captive portal detection probes.

    // TODO: append a random length parameter to the default HTTPS url.

    // TODO: randomize browser version ids in the default User-Agent String.

    private static final String DEFAULT_HTTPS_URL = "https://www.google.com/generate_204";

    private static final String DEFAULT_FALLBACK_URL  = "http://www.google.com/gen_204";

    private static final String DEFAULT_OTHER_FALLBACK_URLS =

            "http://play.googleapis.com/generate_204";

    private static final String DEFAULT_USER_AGENT    = "Mozilla/5.0 (X11; Linux x86_64) "

                                                      + "AppleWebKit/537.36 (KHTML, like Gecko) "

                                                      + "Chrome/60.0.3112.32 Safari/537.36";
@@ -379,7 +375,7 @@ public class NetworkMonitor extends StateMachine { 
        mUseHttps = getUseHttpsValidation();

        mCaptivePortalUserAgent = getCaptivePortalUserAgent();

        mCaptivePortalHttpsUrl = makeURL(getCaptivePortalServerHttpsUrl());

        mCaptivePortalHttpUrl = makeURL(deps.getCaptivePortalServerHttpUrl(context));

        mCaptivePortalHttpUrl = makeURL(getCaptivePortalServerHttpUrl());

        mCaptivePortalFallbackUrls = makeCaptivePortalFallbackUrls();

        mCaptivePortalFallbackSpecs = makeCaptivePortalFallbackProbeSpecs();

        mRandom = deps.getRandom();
@@ -1179,8 +1175,22 @@ public class NetworkMonitor extends StateMachine { 
    }



    private String getCaptivePortalServerHttpsUrl() {

        return mDependencies.getSetting(mContext,

                Settings.Global.CAPTIVE_PORTAL_HTTPS_URL, DEFAULT_HTTPS_URL);

        return getSettingFromResource(mContext, R.string.config_captive_portal_https_url,

                R.string.default_captive_portal_https_url,

                Settings.Global.CAPTIVE_PORTAL_HTTPS_URL);

    }



    /**

     * Get the captive portal server HTTP URL that is configured on the device.

     *

     * NetworkMonitor does not use {@link ConnectivityManager#getCaptivePortalServerUrl()} as

     * it has its own updatable strategies to detect captive portals. The framework only advises

     * on one URL that can be used, while NetworkMonitor may implement more complex logic.

     */

    public String getCaptivePortalServerHttpUrl() {

        return getSettingFromResource(mContext, R.string.config_captive_portal_http_url,

                R.string.default_captive_portal_http_url,

                Settings.Global.CAPTIVE_PORTAL_HTTP_URL);

    }



    private int getConsecutiveDnsTimeoutThreshold() {
@@ -1208,24 +1218,23 @@ public class NetworkMonitor extends StateMachine { 


    private URL[] makeCaptivePortalFallbackUrls() {

        try {

            String separator = ",";

            String firstUrl = mDependencies.getSetting(mContext,

                    Settings.Global.CAPTIVE_PORTAL_FALLBACK_URL, DEFAULT_FALLBACK_URL);

            String joinedUrls = firstUrl + separator + mDependencies.getSetting(mContext,

                    Settings.Global.CAPTIVE_PORTAL_OTHER_FALLBACK_URLS,

                    DEFAULT_OTHER_FALLBACK_URLS);

            List<URL> urls = new ArrayList<>();

            for (String s : joinedUrls.split(separator)) {

                URL u = makeURL(s);

                if (u == null) {

                    continue;

                }

                urls.add(u);

            }

            if (urls.isEmpty()) {

                Log.e(TAG, String.format("could not create any url from %s", joinedUrls));

            }

            return urls.toArray(new URL[urls.size()]);

            final String firstUrl = mDependencies.getSetting(mContext,

                    Settings.Global.CAPTIVE_PORTAL_FALLBACK_URL, null);



            final URL[] settingProviderUrls;

            if (!TextUtils.isEmpty(firstUrl)) {

                final String otherUrls = mDependencies.getSetting(mContext,

                        Settings.Global.CAPTIVE_PORTAL_OTHER_FALLBACK_URLS, "");

                // otherUrls may be empty, but .split() ignores trailing empty strings

                final String separator = ",";

                final String[] urls = (firstUrl + separator + otherUrls).split(separator);

                settingProviderUrls = convertStrings(urls, this::makeURL, new URL[0]);

            } else {

                settingProviderUrls = new URL[0];

            }



            return getArrayConfig(settingProviderUrls, R.array.config_captive_portal_fallback_urls,

                    R.array.default_captive_portal_fallback_urls, this::makeURL);

        } catch (Exception e) {

            // Don't let a misconfiguration bootloop the system.

            Log.e(TAG, "Error parsing configured fallback URLs", e);
@@ -1237,15 +1246,14 @@ public class NetworkMonitor extends StateMachine { 
        try {

            final String settingsValue = mDependencies.getSetting(

                    mContext, Settings.Global.CAPTIVE_PORTAL_FALLBACK_PROBE_SPECS, null);

            // Probe specs only used if configured in settings

            if (TextUtils.isEmpty(settingsValue)) {

                return null;

            }



            final Collection<CaptivePortalProbeSpec> specs =

                    CaptivePortalProbeSpec.parseCaptivePortalProbeSpecs(settingsValue);

            final CaptivePortalProbeSpec[] specsArray = new CaptivePortalProbeSpec[specs.size()];

            return specs.toArray(specsArray);

            final CaptivePortalProbeSpec[] emptySpecs = new CaptivePortalProbeSpec[0];

            final CaptivePortalProbeSpec[] providerValue = TextUtils.isEmpty(settingsValue)

                    ? emptySpecs

                    : parseCaptivePortalProbeSpecs(settingsValue).toArray(emptySpecs);



            return getArrayConfig(providerValue, R.array.config_captive_portal_fallback_probe_specs,

                    R.array.default_captive_portal_fallback_probe_specs,

                    CaptivePortalProbeSpec::parseSpecOrNull);

        } catch (Exception e) {

            // Don't let a misconfiguration bootloop the system.

            Log.e(TAG, "Error parsing configured fallback probe specs", e);
@@ -1253,6 +1261,83 @@ public class NetworkMonitor extends StateMachine { 
        }

    }



    /**

     * Read a setting from a resource or the settings provider.

     *

     * <p>The configuration resource is prioritized, then the provider value, then the default

     * resource value.

     * @param context The context

     * @param configResource The resource id for the configuration parameter

     * @param defaultResource The resource id for the default value

     * @param symbol The symbol in the settings provider

     * @return The best available value

     */

    @NonNull

    private String getSettingFromResource(@NonNull final Context context,

            @StringRes int configResource, @StringRes int defaultResource,

            @NonNull String symbol) {

        final Resources res = context.getResources();

        String setting = res.getString(configResource);



        if (!TextUtils.isEmpty(setting)) return setting;



        setting = mDependencies.getSetting(context, symbol, null);

        if (!TextUtils.isEmpty(setting)) return setting;



        return res.getString(defaultResource);

    }



    /**

     * Get an array configuration from resources or the settings provider.

     *

     * <p>The configuration resource is prioritized, then the provider values, then the default

     * resource values.

     * @param providerValue Values obtained from the setting provider.

     * @param configResId ID of the configuration resource.

     * @param defaultResId ID of the default resource.

     * @param resourceConverter Converter from the resource strings to stored setting class. Null

     *                          return values are ignored.

     */

    private <T> T[] getArrayConfig(@NonNull T[] providerValue, @ArrayRes int configResId,

            @ArrayRes int defaultResId, @NonNull Function<String, T> resourceConverter) {

        final Resources res = mContext.getResources();

        String[] configValue = res.getStringArray(configResId);



        if (configValue.length == 0) {

            if (providerValue.length > 0) {

                return providerValue;

            }



            configValue = res.getStringArray(defaultResId);

        }



        return convertStrings(configValue, resourceConverter, Arrays.copyOf(providerValue, 0));

    }



    /**

     * Convert a String array to an array of some other type using the specified converter.

     *

     * <p>Any null value, or value for which the converter throws a {@link RuntimeException}, will

     * not be added to the output array, so the output array may be smaller than the input.

     */

    private <T> T[] convertStrings(

            @NonNull String[] strings, Function<String, T> converter, T[] emptyArray) {

        final ArrayList<T> convertedValues = new ArrayList<>(strings.length);

        for (String configString : strings) {

            T convertedValue = null;

            try {

                convertedValue = converter.apply(configString);

            } catch (Exception e) {

                Log.e(TAG, "Error parsing configuration", e);

                // Fall through

            }

            if (convertedValue != null) {

                convertedValues.add(convertedValue);

            }

        }

        return convertedValues.toArray(emptyArray);

    }



    private String getCaptivePortalUserAgent() {

        return mDependencies.getSetting(mContext,

                Settings.Global.CAPTIVE_PORTAL_USER_AGENT, DEFAULT_USER_AGENT);
@@ -1693,19 +1778,6 @@ public class NetworkMonitor extends StateMachine { 
            return new Random();

        }



        /**

         * Get the captive portal server HTTP URL that is configured on the device.

         *

         * NetworkMonitor does not use {@link ConnectivityManager#getCaptivePortalServerUrl()} as

         * it has its own updatable strategies to detect captive portals. The framework only advises

         * on one URL that can be used, while  NetworkMonitor may implement more complex logic.

         */

        public String getCaptivePortalServerHttpUrl(Context context) {

            final String defaultUrl =

                    context.getResources().getString(R.string.config_captive_portal_http_url);

            return NetworkMonitorUtils.getCaptivePortalServerHttpUrl(context, defaultUrl);

        }



        /**

         * Get the value of a global integer setting.

         * @param symbol Name of the setting