| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.carrierdefaultapp; |
| |
| import android.app.Activity; |
| import android.app.LoadedApk; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.ActivityInfo; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.graphics.Bitmap; |
| import android.net.ConnectivityManager; |
| import android.net.ConnectivityManager.NetworkCallback; |
| import android.net.Network; |
| import android.net.NetworkCapabilities; |
| import android.net.NetworkRequest; |
| import android.net.Proxy; |
| import android.net.TrafficStats; |
| import android.net.Uri; |
| import android.net.http.SslError; |
| import android.os.Bundle; |
| import android.telephony.CarrierConfigManager; |
| import android.telephony.Rlog; |
| import android.telephony.SubscriptionManager; |
| import android.text.TextUtils; |
| import android.util.ArrayMap; |
| import android.util.Log; |
| import android.util.TypedValue; |
| import android.webkit.SslErrorHandler; |
| import android.webkit.WebChromeClient; |
| import android.webkit.WebSettings; |
| import android.webkit.WebView; |
| import android.webkit.WebViewClient; |
| import android.widget.ProgressBar; |
| import android.widget.TextView; |
| |
| import com.android.internal.telephony.PhoneConstants; |
| import com.android.internal.telephony.TelephonyIntents; |
| import com.android.internal.util.ArrayUtils; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Field; |
| import java.lang.reflect.Method; |
| import java.net.HttpURLConnection; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.util.Random; |
| |
| /** |
| * Activity that launches in response to the captive portal notification |
| * @see com.android.carrierdefaultapp.CarrierActionUtils#CARRIER_ACTION_SHOW_PORTAL_NOTIFICATION |
| * This activity requests network connection if there is no available one before loading the real |
| * portal page and apply carrier actions on the portal activation result. |
| */ |
| public class CaptivePortalLoginActivity extends Activity { |
| private static final String TAG = CaptivePortalLoginActivity.class.getSimpleName(); |
| private static final boolean DBG = true; |
| |
| private static final int SOCKET_TIMEOUT_MS = 10 * 1000; |
| private static final int NETWORK_REQUEST_TIMEOUT_MS = 5 * 1000; |
| |
| private URL mUrl; |
| private Network mNetwork; |
| private NetworkCallback mNetworkCallback; |
| private ConnectivityManager mCm; |
| private WebView mWebView; |
| private MyWebViewClient mWebViewClient; |
| private boolean mLaunchBrowser = false; |
| private Thread mTestingThread = null; |
| private boolean mReload = false; |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| mCm = ConnectivityManager.from(this); |
| mUrl = getUrlForCaptivePortal(); |
| if (mUrl == null) { |
| done(false); |
| return; |
| } |
| if (DBG) logd(String.format("onCreate for %s", mUrl.toString())); |
| setContentView(R.layout.activity_captive_portal_login); |
| getActionBar().setDisplayShowHomeEnabled(false); |
| |
| mWebView = findViewById(R.id.webview); |
| mWebView.clearCache(true); |
| WebSettings webSettings = mWebView.getSettings(); |
| webSettings.setJavaScriptEnabled(true); |
| webSettings.setMixedContentMode(WebSettings.MIXED_CONTENT_COMPATIBILITY_MODE); |
| webSettings.setUseWideViewPort(true); |
| webSettings.setLoadWithOverviewMode(true); |
| webSettings.setSupportZoom(true); |
| webSettings.setBuiltInZoomControls(true); |
| webSettings.setDomStorageEnabled(true); |
| mWebViewClient = new MyWebViewClient(); |
| mWebView.setWebViewClient(mWebViewClient); |
| mWebView.setWebChromeClient(new MyWebChromeClient()); |
| |
| final Network network = getNetworkForCaptivePortal(); |
| if (network == null) { |
| requestNetworkForCaptivePortal(); |
| } else { |
| setNetwork(network); |
| // Start initial page load so WebView finishes loading proxy settings. |
| // Actual load of mUrl is initiated by MyWebViewClient. |
| mWebView.loadData("", "text/html", null); |
| } |
| } |
| |
| @Override |
| public void onBackPressed() { |
| WebView myWebView = findViewById(R.id.webview); |
| if (myWebView.canGoBack() && mWebViewClient.allowBack()) { |
| myWebView.goBack(); |
| } else { |
| super.onBackPressed(); |
| } |
| } |
| |
| @Override |
| public void onDestroy() { |
| if (mLaunchBrowser) { |
| // Give time for this network to become default. After 500ms just proceed. |
| for (int i = 0; i < 5; i++) { |
| // TODO: This misses when mNetwork underlies a VPN. |
| if (mNetwork.equals(mCm.getActiveNetwork())) break; |
| try { |
| Thread.sleep(100); |
| } catch (InterruptedException e) { |
| } |
| } |
| final String url = mUrl.toString(); |
| if (DBG) logd("starting activity with intent ACTION_VIEW for " + url); |
| startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(url))); |
| } |
| |
| if (mTestingThread != null) { |
| mTestingThread.interrupt(); |
| } |
| mWebView.destroy(); |
| releaseNetworkRequest(); |
| super.onDestroy(); |
| } |
| |
| private void setNetwork(Network network) { |
| if (network != null) { |
| network = network.getPrivateDnsBypassingCopy(); |
| mCm.bindProcessToNetwork(network); |
| mCm.setProcessDefaultNetworkForHostResolution(network); |
| } |
| mNetwork = network; |
| } |
| |
| // Find WebView's proxy BroadcastReceiver and prompt it to read proxy system properties. |
| private void setWebViewProxy() { |
| LoadedApk loadedApk = getApplication().mLoadedApk; |
| try { |
| Field receiversField = LoadedApk.class.getDeclaredField("mReceivers"); |
| receiversField.setAccessible(true); |
| ArrayMap receivers = (ArrayMap) receiversField.get(loadedApk); |
| for (Object receiverMap : receivers.values()) { |
| for (Object rec : ((ArrayMap) receiverMap).keySet()) { |
| Class clazz = rec.getClass(); |
| if (clazz.getName().contains("ProxyChangeListener")) { |
| Method onReceiveMethod = clazz.getDeclaredMethod("onReceive", Context.class, |
| Intent.class); |
| Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); |
| onReceiveMethod.invoke(rec, getApplicationContext(), intent); |
| Log.v(TAG, "Prompting WebView proxy reload."); |
| } |
| } |
| } |
| } catch (Exception e) { |
| loge("Exception while setting WebView proxy: " + e); |
| } |
| } |
| |
| private void done(boolean success) { |
| if (DBG) logd(String.format("Result success %b for %s", success, |
| mUrl != null ? mUrl.toString() : "null")); |
| if (success) { |
| // Trigger re-evaluation upon success http response code |
| CarrierActionUtils.applyCarrierAction( |
| CarrierActionUtils.CARRIER_ACTION_ENABLE_RADIO, getIntent(), |
| getApplicationContext()); |
| CarrierActionUtils.applyCarrierAction( |
| CarrierActionUtils.CARRIER_ACTION_ENABLE_METERED_APNS, getIntent(), |
| getApplicationContext()); |
| CarrierActionUtils.applyCarrierAction( |
| CarrierActionUtils.CARRIER_ACTION_CANCEL_ALL_NOTIFICATIONS, getIntent(), |
| getApplicationContext()); |
| CarrierActionUtils.applyCarrierAction( |
| CarrierActionUtils.CARRIER_ACTION_DISABLE_DEFAULT_URL_HANDLER, getIntent(), |
| getApplicationContext()); |
| CarrierActionUtils.applyCarrierAction( |
| CarrierActionUtils.CARRIER_ACTION_DEREGISTER_DEFAULT_NETWORK_AVAIL, getIntent(), |
| getApplicationContext()); |
| } |
| finishAndRemoveTask(); |
| } |
| |
| private URL getUrlForCaptivePortal() { |
| String url = getIntent().getStringExtra(TelephonyIntents.EXTRA_REDIRECTION_URL_KEY); |
| if (TextUtils.isEmpty(url)) url = mCm.getCaptivePortalServerUrl(); |
| final CarrierConfigManager configManager = getApplicationContext() |
| .getSystemService(CarrierConfigManager.class); |
| final int subId = getIntent().getIntExtra(PhoneConstants.SUBSCRIPTION_KEY, |
| SubscriptionManager.getDefaultVoiceSubscriptionId()); |
| final String[] portalURLs = configManager.getConfigForSubId(subId).getStringArray( |
| CarrierConfigManager.KEY_CARRIER_DEFAULT_REDIRECTION_URL_STRING_ARRAY); |
| if (!ArrayUtils.isEmpty(portalURLs)) { |
| for (String portalUrl : portalURLs) { |
| if (url.startsWith(portalUrl)) { |
| break; |
| } |
| } |
| url = null; |
| } |
| try { |
| return new URL(url); |
| } catch (MalformedURLException e) { |
| loge("Invalid captive portal URL " + url); |
| } |
| return null; |
| } |
| |
| private void testForCaptivePortal() { |
| mTestingThread = new Thread(new Runnable() { |
| public void run() { |
| // Give time for captive portal to open. |
| try { |
| Thread.sleep(1000); |
| } catch (InterruptedException e) { |
| } |
| if (isFinishing() || isDestroyed()) return; |
| HttpURLConnection urlConnection = null; |
| int httpResponseCode = 500; |
| int oldTag = TrafficStats.getAndSetThreadStatsTag(TrafficStats.TAG_SYSTEM_PROBE); |
| try { |
| urlConnection = (HttpURLConnection) mNetwork.openConnection( |
| new URL(mCm.getCaptivePortalServerUrl())); |
| urlConnection.setInstanceFollowRedirects(false); |
| urlConnection.setConnectTimeout(SOCKET_TIMEOUT_MS); |
| urlConnection.setReadTimeout(SOCKET_TIMEOUT_MS); |
| urlConnection.setUseCaches(false); |
| urlConnection.getInputStream(); |
| httpResponseCode = urlConnection.getResponseCode(); |
| } catch (IOException e) { |
| loge(e.getMessage()); |
| } finally { |
| if (urlConnection != null) urlConnection.disconnect(); |
| TrafficStats.setThreadStatsTag(oldTag); |
| } |
| if (httpResponseCode == 204) { |
| done(true); |
| } |
| } |
| }); |
| mTestingThread.start(); |
| } |
| |
| private Network getNetworkForCaptivePortal() { |
| Network[] info = mCm.getAllNetworks(); |
| if (!ArrayUtils.isEmpty(info)) { |
| for (Network nw : info) { |
| final NetworkCapabilities nc = mCm.getNetworkCapabilities(nw); |
| if (nc.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) |
| && nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) { |
| return nw; |
| } |
| } |
| } |
| return null; |
| } |
| |
| private void requestNetworkForCaptivePortal() { |
| NetworkRequest request = new NetworkRequest.Builder() |
| .addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR) |
| .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) |
| .removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED) |
| .build(); |
| |
| mNetworkCallback = new ConnectivityManager.NetworkCallback() { |
| @Override |
| public void onAvailable(Network network) { |
| if (DBG) logd("Network available: " + network); |
| setNetwork(network); |
| runOnUiThreadIfNotFinishing(() -> { |
| if (mReload) { |
| mWebView.reload(); |
| } else { |
| // Start initial page load so WebView finishes loading proxy settings. |
| // Actual load of mUrl is initiated by MyWebViewClient. |
| mWebView.loadData("", "text/html", null); |
| } |
| }); |
| } |
| |
| @Override |
| public void onUnavailable() { |
| if (DBG) logd("Network unavailable"); |
| runOnUiThreadIfNotFinishing(() -> { |
| // Instead of not loading anything in webview, simply load the page and return |
| // HTTP error page in the absence of network connection. |
| mWebView.loadUrl(mUrl.toString()); |
| }); |
| } |
| |
| @Override |
| public void onLost(Network lostNetwork) { |
| if (DBG) logd("Network lost"); |
| mReload = true; |
| } |
| }; |
| logd("request Network for captive portal"); |
| mCm.requestNetwork(request, mNetworkCallback, NETWORK_REQUEST_TIMEOUT_MS); |
| } |
| |
| private void releaseNetworkRequest() { |
| logd("release Network for captive portal"); |
| if (mNetworkCallback != null) { |
| mCm.unregisterNetworkCallback(mNetworkCallback); |
| mNetworkCallback = null; |
| mNetwork = null; |
| } |
| } |
| |
| private class MyWebViewClient extends WebViewClient { |
| private static final String INTERNAL_ASSETS = "file:///android_asset/"; |
| private final String mBrowserBailOutToken = Long.toString(new Random().nextLong()); |
| // How many Android device-independent-pixels per scaled-pixel |
| // dp/sp = (px/sp) / (px/dp) = (1/sp) / (1/dp) |
| private final float mDpPerSp = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 1, |
| getResources().getDisplayMetrics()) |
| / TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, |
| getResources().getDisplayMetrics()); |
| private int mPagesLoaded; |
| |
| // If we haven't finished cleaning up the history, don't allow going back. |
| public boolean allowBack() { |
| return mPagesLoaded > 1; |
| } |
| |
| @Override |
| public void onPageStarted(WebView view, String url, Bitmap favicon) { |
| if (url.contains(mBrowserBailOutToken)) { |
| mLaunchBrowser = true; |
| done(false); |
| return; |
| } |
| // The first page load is used only to cause the WebView to |
| // fetch the proxy settings. Don't update the URL bar, and |
| // don't check if the captive portal is still there. |
| if (mPagesLoaded == 0) return; |
| // For internally generated pages, leave URL bar listing prior URL as this is the URL |
| // the page refers to. |
| if (!url.startsWith(INTERNAL_ASSETS)) { |
| final TextView myUrlBar = findViewById(R.id.url_bar); |
| myUrlBar.setText(url); |
| } |
| if (mNetwork != null) { |
| testForCaptivePortal(); |
| } |
| } |
| |
| @Override |
| public void onPageFinished(WebView view, String url) { |
| mPagesLoaded++; |
| if (mPagesLoaded == 1) { |
| // Now that WebView has loaded at least one page we know it has read in the proxy |
| // settings. Now prompt the WebView read the Network-specific proxy settings. |
| setWebViewProxy(); |
| // Load the real page. |
| view.loadUrl(mUrl.toString()); |
| return; |
| } else if (mPagesLoaded == 2) { |
| // Prevent going back to empty first page. |
| view.clearHistory(); |
| } |
| if (mNetwork != null) { |
| testForCaptivePortal(); |
| } |
| } |
| |
| // Convert Android device-independent-pixels (dp) to HTML size. |
| private String dp(int dp) { |
| // HTML px's are scaled just like dp's, so just add "px" suffix. |
| return Integer.toString(dp) + "px"; |
| } |
| |
| // Convert Android scaled-pixels (sp) to HTML size. |
| private String sp(int sp) { |
| // Convert sp to dp's. |
| float dp = sp * mDpPerSp; |
| // Apply a scale factor to make things look right. |
| dp *= 1.3; |
| // Convert dp's to HTML size. |
| return dp((int) dp); |
| } |
| |
| // A web page consisting of a large broken lock icon to indicate SSL failure. |
| private final String SSL_ERROR_HTML = "<html><head><style>" |
| + "body { margin-left:" + dp(48) + "; margin-right:" + dp(48) + "; " |
| + "margin-top:" + dp(96) + "; background-color:#fafafa; }" |
| + "img { width:" + dp(48) + "; height:" + dp(48) + "; }" |
| + "div.warn { font-size:" + sp(16) + "; margin-top:" + dp(16) + "; " |
| + " opacity:0.87; line-height:1.28; }" |
| + "div.example { font-size:" + sp(14) + "; margin-top:" + dp(16) + "; " |
| + " opacity:0.54; line-height:1.21905; }" |
| + "a { font-size:" + sp(14) + "; text-decoration:none; text-transform:uppercase; " |
| + " margin-top:" + dp(24) + "; display:inline-block; color:#4285F4; " |
| + " height:" + dp(48) + "; font-weight:bold; }" |
| + "</style></head><body><p><img src=quantum_ic_warning_amber_96.png><br>" |
| + "<div class=warn>%s</div>" |
| + "<div class=example>%s</div>" + "<a href=%s>%s</a></body></html>"; |
| |
| @Override |
| public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) { |
| Log.w(TAG, "SSL error (error: " + error.getPrimaryError() + " host: " |
| // Only show host to avoid leaking private info. |
| + Uri.parse(error.getUrl()).getHost() + " certificate: " |
| + error.getCertificate() + "); displaying SSL warning."); |
| final String html = String.format(SSL_ERROR_HTML, getString(R.string.ssl_error_warning), |
| getString(R.string.ssl_error_example), mBrowserBailOutToken, |
| getString(R.string.ssl_error_continue)); |
| view.loadDataWithBaseURL(INTERNAL_ASSETS, html, "text/HTML", "UTF-8", null); |
| } |
| |
| @Override |
| public boolean shouldOverrideUrlLoading(WebView view, String url) { |
| if (url.startsWith("tel:")) { |
| startActivity(new Intent(Intent.ACTION_DIAL, Uri.parse(url))); |
| return true; |
| } |
| return false; |
| } |
| } |
| |
| private class MyWebChromeClient extends WebChromeClient { |
| @Override |
| public void onProgressChanged(WebView view, int newProgress) { |
| final ProgressBar myProgressBar = findViewById(R.id.progress_bar); |
| myProgressBar.setProgress(newProgress); |
| } |
| } |
| |
| private void runOnUiThreadIfNotFinishing(Runnable r) { |
| if (!isFinishing()) { |
| runOnUiThread(r); |
| } |
| } |
| |
| /** |
| * This alias presents the target activity, CaptivePortalLoginActivity, as a independent |
| * entity with its own intent filter to handle URL links. This alias will be enabled/disabled |
| * dynamically to handle url links based on the network conditions. |
| */ |
| public static String getAlias(Context context) { |
| try { |
| PackageInfo p = context.getPackageManager().getPackageInfo(context.getPackageName(), |
| PackageManager.GET_ACTIVITIES | PackageManager.MATCH_DISABLED_COMPONENTS); |
| for (ActivityInfo activityInfo : p.activities) { |
| String targetActivity = activityInfo.targetActivity; |
| if (CaptivePortalLoginActivity.class.getName().equals(targetActivity)) { |
| return activityInfo.name; |
| } |
| } |
| } catch (PackageManager.NameNotFoundException e) { |
| e.printStackTrace(); |
| } |
| return null; |
| } |
| |
| private static void logd(String s) { |
| Rlog.d(TAG, s); |
| } |
| |
| private static void loge(String s) { |
| Rlog.d(TAG, s); |
| } |
| |
| } |