/* * Copyright (C) 2014 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.server.telecom; import android.Manifest; import android.app.Activity; import android.app.AppOpsManager; import android.app.BroadcastOptions; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Trace; import android.os.UserHandle; import android.telecom.GatewayInfo; import android.telecom.Log; import android.telecom.PhoneAccount; import android.telecom.PhoneAccountHandle; import android.telecom.TelecomManager; import android.telecom.VideoProfile; import android.telephony.DisconnectCause; import android.telephony.TelephonyManager; import android.text.TextUtils; import com.android.internal.annotations.VisibleForTesting; import com.android.server.telecom.flags.FeatureFlags; import com.android.server.telecom.callredirection.CallRedirectionProcessor; // TODO: Needed for move to system service: import com.android.internal.R; /** * OutgoingCallIntentBroadcaster receives CALL and CALL_PRIVILEGED Intents, and broadcasts the * ACTION_NEW_OUTGOING_CALL intent. ACTION_NEW_OUTGOING_CALL is an ordered broadcast intent which * contains the phone number being dialed. Applications can use this intent to (1) see which numbers * are being dialed, (2) redirect a call (change the number being dialed), or (3) prevent a call * from being placed. * * After the other applications have had a chance to see the ACTION_NEW_OUTGOING_CALL intent, it * finally reaches the {@link NewOutgoingCallBroadcastIntentReceiver}. * * Calls where no number is present (like for a CDMA "empty flash" or a nonexistent voicemail * number) are exempt from being broadcast. * * Calls to emergency numbers are still broadcast for informative purposes. The call is placed * prior to sending ACTION_NEW_OUTGOING_CALL and cannot be redirected nor prevented. */ @VisibleForTesting public class NewOutgoingCallIntentBroadcaster { /** * Legacy string constants used to retrieve gateway provider extras from intents. These still * need to be copied from the source call intent to the destination intent in order to * support third party gateway providers that are still using old string constants in * Telephony. */ public static final String EXTRA_GATEWAY_PROVIDER_PACKAGE = "com.android.phone.extra.GATEWAY_PROVIDER_PACKAGE"; public static final String EXTRA_GATEWAY_URI = "com.android.phone.extra.GATEWAY_URI"; private final CallsManager mCallsManager; private Call mCall; private final Intent mIntent; private final Context mContext; private final PhoneNumberUtilsAdapter mPhoneNumberUtilsAdapter; private final TelecomSystem.SyncRoot mLock; private final DefaultDialerCache mDefaultDialerCache; private final MmiUtils mMmiUtils; private final FeatureFlags mFeatureFlags; /* * Whether or not the outgoing call intent originated from the default phone application. If * so, it will be allowed to make emergency calls, even with the ACTION_CALL intent. */ private final boolean mIsDefaultOrSystemPhoneApp; public static class CallDisposition { // True for certain types of numbers that are not intended to be intercepted or modified // by third parties (e.g. emergency numbers). public boolean callImmediately = false; // True for all managed calls, false for self-managed calls. public boolean sendBroadcast = true; // True for requesting call redirection, false for not requesting it. public boolean requestRedirection = true; public int disconnectCause = DisconnectCause.NOT_DISCONNECTED; String number; Uri callingAddress; } @VisibleForTesting public NewOutgoingCallIntentBroadcaster(Context context, CallsManager callsManager, Intent intent, PhoneNumberUtilsAdapter phoneNumberUtilsAdapter, boolean isDefaultPhoneApp, DefaultDialerCache defaultDialerCache, MmiUtils mmiUtils, FeatureFlags featureFlags) { mContext = context; mCallsManager = callsManager; mIntent = intent; mPhoneNumberUtilsAdapter = phoneNumberUtilsAdapter; mIsDefaultOrSystemPhoneApp = isDefaultPhoneApp; mLock = mCallsManager.getLock(); mDefaultDialerCache = defaultDialerCache; mMmiUtils = mmiUtils; mFeatureFlags = featureFlags; } /** * Processes the result of the outgoing call broadcast intent, and performs callbacks to * the OutgoingCallIntentBroadcasterListener as necessary. */ public class NewOutgoingCallBroadcastIntentReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { try { Log.startSession("NOCBIR.oR"); Trace.beginSection("onReceiveNewOutgoingCallBroadcast"); synchronized (mLock) { Log.v(this, "onReceive: %s", intent); // Once the NEW_OUTGOING_CALL broadcast is finished, the resultData is // used as the actual number to call. (If null, no call will be placed.) String resultNumber = getResultData(); Log.i(NewOutgoingCallIntentBroadcaster.this, "Received new-outgoing-call-broadcast for %s with data %s", mCall, Log.pii(resultNumber)); boolean endEarly = false; long disconnectTimeout = Timeouts.getNewOutgoingCallCancelMillis(mContext.getContentResolver()); if (resultNumber == null) { Log.v(this, "Call cancelled (null number), returning..."); disconnectTimeout = getDisconnectTimeoutFromApp( getResultExtras(false), disconnectTimeout); endEarly = true; } else if (isEmergencyNumber(resultNumber)) { Log.w(this, "Cannot modify outgoing call to emergency number %s.", resultNumber); disconnectTimeout = 0; endEarly = true; } if (endEarly) { if (mCall != null) { mCall.disconnect(disconnectTimeout); } return; } // If this call is already disconnected then we have nothing more to do. if (mCall.isDisconnected()) { Log.w(this, "Call has already been disconnected," + " ignore the broadcast Call %s", mCall); return; } // TODO: Remove the assumption that phone numbers are either SIP or TEL. // This does not impact self-managed ConnectionServices as they do not use the // NewOutgoingCallIntentBroadcaster. Uri resultHandleUri = Uri.fromParts( mPhoneNumberUtilsAdapter.isUriNumber(resultNumber) ? PhoneAccount.SCHEME_SIP : PhoneAccount.SCHEME_TEL, resultNumber, null); Uri originalUri = mIntent.getData(); if (originalUri.getSchemeSpecificPart().equals(resultNumber)) { Log.v(this, "Call number unmodified after" + " new outgoing call intent broadcast."); } else { Log.v(this, "Retrieved modified handle after outgoing call intent" + " broadcast: Original: %s, Modified: %s", Log.pii(originalUri), Log.pii(resultHandleUri)); } GatewayInfo gatewayInfo = getGateWayInfoFromIntent(intent, resultHandleUri); placeOutgoingCallImmediately(mCall, resultHandleUri, gatewayInfo, mIntent.getBooleanExtra( TelecomManager.EXTRA_START_CALL_WITH_SPEAKERPHONE, false), mIntent.getIntExtra(TelecomManager.EXTRA_START_CALL_WITH_VIDEO_STATE, VideoProfile.STATE_AUDIO_ONLY)); } } finally { Trace.endSection(); Log.endSession(); } } } /** * Processes the supplied intent and starts the outgoing call broadcast process relevant to the * intent. * * This method will handle three kinds of actions: * * - CALL (intent launched by all third party dialers) * - CALL_PRIVILEGED (intent launched by system apps e.g. system Dialer, voice Dialer) * - CALL_EMERGENCY (intent launched by lock screen emergency dialer) * * @return {@link DisconnectCause#NOT_DISCONNECTED} if the call succeeded, and an appropriate * {@link DisconnectCause} if the call did not, describing why it failed. */ @VisibleForTesting public CallDisposition evaluateCall() { CallDisposition result = new CallDisposition(); Intent intent = mIntent; String action = intent.getAction(); final Uri handle = intent.getData(); if (handle == null) { Log.w(this, "Empty handle obtained from the call intent."); result.disconnectCause = DisconnectCause.INVALID_NUMBER; return result; } boolean isVoicemailNumber = PhoneAccount.SCHEME_VOICEMAIL.equals(handle.getScheme()); if (isVoicemailNumber) { if (Intent.ACTION_CALL.equals(action) || Intent.ACTION_CALL_PRIVILEGED.equals(action)) { // Voicemail calls will be handled directly by the telephony connection manager Log.i(this, "Voicemail number dialed. Skipping redirection and broadcast", intent); mIntent.putExtra(TelecomManager.EXTRA_START_CALL_WITH_VIDEO_STATE, VideoProfile.STATE_AUDIO_ONLY); result.callImmediately = true; result.requestRedirection = false; result.sendBroadcast = false; result.callingAddress = handle; return result; } else { Log.i(this, "Unhandled intent %s. Ignoring and not placing call.", intent); result.disconnectCause = DisconnectCause.OUTGOING_CANCELED; return result; } } PhoneAccountHandle targetPhoneAccount = mIntent.getParcelableExtra( TelecomManager.EXTRA_PHONE_ACCOUNT_HANDLE); boolean isSelfManaged = false; if (targetPhoneAccount != null) { PhoneAccount phoneAccount = mCallsManager.getPhoneAccountRegistrar().getPhoneAccountUnchecked( targetPhoneAccount); if (phoneAccount != null) { isSelfManaged = phoneAccount.isSelfManaged(); } } result.number = ""; result.callingAddress = handle; if (isSelfManaged) { // Self-managed call. result.callImmediately = true; result.sendBroadcast = false; result.requestRedirection = false; Log.i(this, "Skipping NewOutgoingCallBroadcast for self-managed call."); return result; } // Placing a managed call String number = getNumberFromCallIntent(intent); result.number = number; if (number == null) { result.disconnectCause = DisconnectCause.NO_PHONE_NUMBER_SUPPLIED; return result; } final boolean isEmergencyNumber = isEmergencyNumber(number); Log.v(this, "isEmergencyNumber = %s", isEmergencyNumber); action = calculateCallIntentAction(intent, isEmergencyNumber); intent.setAction(action); if (Intent.ACTION_CALL.equals(action)) { if (isEmergencyNumber) { if (!mIsDefaultOrSystemPhoneApp) { Log.w(this, "Cannot call potential emergency number %s with CALL Intent %s " + "unless caller is system or default dialer.", number, intent); launchSystemDialer(intent.getData()); result.disconnectCause = DisconnectCause.OUTGOING_CANCELED; return result; } else { result.callImmediately = true; result.requestRedirection = false; } } else if (mMmiUtils.isDangerousMmiOrVerticalCode(intent.getData())) { if (!mIsDefaultOrSystemPhoneApp) { Log.w(this, "Potentially dangerous MMI code %s with CALL Intent %s can only be " + "sent if caller is the system or default dialer", number, intent); launchSystemDialer(intent.getData()); result.disconnectCause = DisconnectCause.OUTGOING_CANCELED; return result; } } } else if (Intent.ACTION_CALL_EMERGENCY.equals(action)) { if (!isEmergencyNumber) { Log.w(this, "Cannot call non-potential-emergency number %s with EMERGENCY_CALL " + "Intent %s.", number, intent); result.disconnectCause = DisconnectCause.OUTGOING_CANCELED; return result; } result.callImmediately = true; result.requestRedirection = false; } else { Log.w(this, "Unhandled Intent %s. Ignoring and not placing call.", intent); result.disconnectCause = DisconnectCause.INVALID_NUMBER; return result; } String scheme = mPhoneNumberUtilsAdapter.isUriNumber(number) ? PhoneAccount.SCHEME_SIP : PhoneAccount.SCHEME_TEL; result.callingAddress = Uri.fromParts(scheme, number, null); return result; } private String getNumberFromCallIntent(Intent intent) { String number = null; Uri uri = intent.getData(); if (uri != null) { String scheme = uri.getScheme(); if (scheme != null) { if (scheme.equals("tel") || scheme.equals("sip")) { number = uri.getSchemeSpecificPart(); } } } if (TextUtils.isEmpty(number)) { Log.w(this, "Empty number obtained from the call intent."); return null; } boolean isUriNumber = mPhoneNumberUtilsAdapter.isUriNumber(number); if (!isUriNumber) { number = mPhoneNumberUtilsAdapter.convertKeypadLettersToDigits(number); number = mPhoneNumberUtilsAdapter.stripSeparators(number); } return number; } public void processCall(Call call, CallDisposition disposition) { mCall = call; // If the new outgoing call broadast doesn't block, trigger the legacy process call // behavior and exit out here. if (!mFeatureFlags.isNewOutgoingCallBroadcastUnblocking()) { legacyProcessCall(disposition); return; } boolean callRedirectionWithService = false; // Only try to do redirection if it was requested and we're not calling immediately. // We can expect callImmediately to be true for emergency calls and voip calls. if (disposition.requestRedirection && !disposition.callImmediately) { CallRedirectionProcessor callRedirectionProcessor = new CallRedirectionProcessor( mContext, mCallsManager, mCall, disposition.callingAddress, mCallsManager.getPhoneAccountRegistrar(), getGateWayInfoFromIntent(mIntent, mIntent.getData()), mIntent.getBooleanExtra(TelecomManager.EXTRA_START_CALL_WITH_SPEAKERPHONE, false), mIntent.getIntExtra(TelecomManager.EXTRA_START_CALL_WITH_VIDEO_STATE, VideoProfile.STATE_AUDIO_ONLY)); /** * If there is an available {@link android.telecom.CallRedirectionService}, use the * {@link CallRedirectionProcessor} to perform call redirection instead of using * broadcasting. */ callRedirectionWithService = callRedirectionProcessor .canMakeCallRedirectionWithServiceAsUser(mCall.getAssociatedUser()); if (callRedirectionWithService) { callRedirectionProcessor.performCallRedirection(mCall.getAssociatedUser()); } } // If no redirection was kicked off, place the call now. if (!callRedirectionWithService) { callImmediately(disposition); } // Finally, send the non-blocking broadcast if we're supposed to (ie for any non-voip call). if (disposition.sendBroadcast) { UserHandle targetUser = mCall.getAssociatedUser(); broadcastIntent(mIntent, disposition.number, false /* receiverRequired */, targetUser); } } /** * The legacy non-flagged version of processing a call. Although there is some code duplication * if makes the new flow cleaner to read. * @param disposition */ private void legacyProcessCall(CallDisposition disposition) { if (disposition.callImmediately) { callImmediately(disposition); // Don't return but instead continue and send the ACTION_NEW_OUTGOING_CALL broadcast // so that third parties can still inspect (but not intercept) the outgoing call. When // the broadcast finally reaches the OutgoingCallBroadcastReceiver, we'll know not to // initiate the call again because of the presence of the EXTRA_ALREADY_CALLED extra. } boolean callRedirectionWithService = false; if (disposition.requestRedirection) { CallRedirectionProcessor callRedirectionProcessor = new CallRedirectionProcessor( mContext, mCallsManager, mCall, disposition.callingAddress, mCallsManager.getPhoneAccountRegistrar(), getGateWayInfoFromIntent(mIntent, mIntent.getData()), mIntent.getBooleanExtra(TelecomManager.EXTRA_START_CALL_WITH_SPEAKERPHONE, false), mIntent.getIntExtra(TelecomManager.EXTRA_START_CALL_WITH_VIDEO_STATE, VideoProfile.STATE_AUDIO_ONLY)); /** * If there is an available {@link android.telecom.CallRedirectionService}, use the * {@link CallRedirectionProcessor} to perform call redirection instead of using * broadcasting. */ callRedirectionWithService = callRedirectionProcessor .canMakeCallRedirectionWithServiceAsUser(mCall.getAssociatedUser()); if (callRedirectionWithService) { callRedirectionProcessor.performCallRedirection(mCall.getAssociatedUser()); } } if (disposition.sendBroadcast) { UserHandle targetUser = mCall.getAssociatedUser(); broadcastIntent(mIntent, disposition.number, !disposition.callImmediately && !callRedirectionWithService, targetUser); } } /** * Place a call immediately. * @param disposition The disposition; used for retrieving the address of the call. */ private void callImmediately(CallDisposition disposition) { boolean speakerphoneOn = mIntent.getBooleanExtra( TelecomManager.EXTRA_START_CALL_WITH_SPEAKERPHONE, false); int videoState = mIntent.getIntExtra( TelecomManager.EXTRA_START_CALL_WITH_VIDEO_STATE, VideoProfile.STATE_AUDIO_ONLY); placeOutgoingCallImmediately(mCall, disposition.callingAddress, null, speakerphoneOn, videoState); } /** * Sends a new outgoing call ordered broadcast so that third party apps can cancel the * placement of the call or redirect it to a different number. * * @param originalCallIntent The original call intent. * @param number Call number that was stored in the original call intent. * @param receiverRequired Whether or not the result from the ordered broadcast should be * processed using a {@link NewOutgoingCallIntentBroadcaster}. * @param targetUser User that the broadcast sent to. */ private void broadcastIntent( Intent originalCallIntent, String number, boolean receiverRequired, UserHandle targetUser) { Intent broadcastIntent = new Intent(Intent.ACTION_NEW_OUTGOING_CALL); if (number != null) { broadcastIntent.putExtra(Intent.EXTRA_PHONE_NUMBER, number); } Log.v(this, "Broadcasting intent: %s.", broadcastIntent); checkAndCopyProviderExtras(originalCallIntent, broadcastIntent); if (mFeatureFlags.isNewOutgoingCallBroadcastUnblocking()) { // Where the new outgoing call broadcast is unblocking, do not give receiver FG priority // and do not allow background activity starts. broadcastIntent.addFlags(Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND); Log.i(this, "broadcastIntent: Sending non-blocking for %s to %s", mCall.getId(), targetUser); if (mFeatureFlags.telecomResolveHiddenDependencies()) { mContext.sendBroadcastAsUser( broadcastIntent, targetUser, Manifest.permission.PROCESS_OUTGOING_CALLS); } else { mContext.sendBroadcastAsUser( broadcastIntent, targetUser, android.Manifest.permission.PROCESS_OUTGOING_CALLS, AppOpsManager.OP_PROCESS_OUTGOING_CALLS); // initialExtras } } else { Log.i(this, "broadcastIntent: Sending ordered for %s to %s, waitForResult=%b", mCall.getId(), targetUser, receiverRequired); final BroadcastOptions options = BroadcastOptions.makeBasic(); options.setBackgroundActivityStartsAllowed(true); // Force receivers of this broadcast intent to run at foreground priority because we // want to finish processing the broadcast intent as soon as possible. broadcastIntent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND | Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND); mContext.sendOrderedBroadcastAsUser( broadcastIntent, targetUser, android.Manifest.permission.PROCESS_OUTGOING_CALLS, AppOpsManager.OP_PROCESS_OUTGOING_CALLS, options.toBundle(), receiverRequired ? new NewOutgoingCallBroadcastIntentReceiver() : null, null, // scheduler Activity.RESULT_OK, // initialCode number, // initialData: initial value for the result data (number to be // modified) null); // initialExtras } } /** * Copy all the expected extras set when a 3rd party gateway provider is to be used, from the * source intent to the destination one. * * @param src Intent which may contain the provider's extras. * @param dst Intent where a copy of the extras will be added if applicable. */ public void checkAndCopyProviderExtras(Intent src, Intent dst) { if (src == null) { return; } if (hasGatewayProviderExtras(src)) { dst.putExtra(EXTRA_GATEWAY_PROVIDER_PACKAGE, src.getStringExtra(EXTRA_GATEWAY_PROVIDER_PACKAGE)); dst.putExtra(EXTRA_GATEWAY_URI, src.getStringExtra(EXTRA_GATEWAY_URI)); Log.d(this, "Found and copied gateway provider extras to broadcast intent."); return; } Log.d(this, "No provider extras found in call intent."); } /** * Check if valid gateway provider information is stored as extras in the intent * * @param intent to check for * @return true if the intent has all the gateway information extras needed. */ private boolean hasGatewayProviderExtras(Intent intent) { final String name = intent.getStringExtra(EXTRA_GATEWAY_PROVIDER_PACKAGE); final String uriString = intent.getStringExtra(EXTRA_GATEWAY_URI); return !TextUtils.isEmpty(name) && !TextUtils.isEmpty(uriString); } private static Uri getGatewayUriFromString(String gatewayUriString) { return TextUtils.isEmpty(gatewayUriString) ? null : Uri.parse(gatewayUriString); } /** * Extracts gateway provider information from a provided intent.. * * @param intent to extract gateway provider information from. * @param trueHandle The actual call handle that the user is trying to dial * @return GatewayInfo object containing extracted gateway provider information as well as * the actual handle the user is trying to dial. */ public static GatewayInfo getGateWayInfoFromIntent(Intent intent, Uri trueHandle) { if (intent == null) { return null; } // Check if gateway extras are present. String gatewayPackageName = intent.getStringExtra(EXTRA_GATEWAY_PROVIDER_PACKAGE); Uri gatewayUri = getGatewayUriFromString(intent.getStringExtra(EXTRA_GATEWAY_URI)); if (!TextUtils.isEmpty(gatewayPackageName) && gatewayUri != null) { return new GatewayInfo(gatewayPackageName, gatewayUri, trueHandle); } return null; } private void placeOutgoingCallImmediately(Call call, Uri handle, GatewayInfo gatewayInfo, boolean speakerphoneOn, int videoState) { Log.i(this, "Placing call immediately instead of waiting for OutgoingCallBroadcastReceiver"); // Since we are not going to go through "Outgoing call broadcast", make sure // we mark it as ready. mCall.setNewOutgoingCallIntentBroadcastIsDone(); mCallsManager.placeOutgoingCall(call, handle, gatewayInfo, speakerphoneOn, videoState); } private void launchSystemDialer(Uri handle) { Intent systemDialerIntent = new Intent(); systemDialerIntent.setComponent(mDefaultDialerCache.getDialtactsSystemDialerComponent()); systemDialerIntent.setAction(Intent.ACTION_DIAL); systemDialerIntent.setData(handle); systemDialerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); Log.v(this, "calling startActivity for default dialer: %s", systemDialerIntent); mContext.startActivityAsUser(systemDialerIntent, UserHandle.CURRENT); } /** * Check whether or not this is an emergency number, in order to enforce the restriction * that only the CALL_PRIVILEGED and CALL_EMERGENCY intents are allowed to make emergency * calls. * * @param number number to inspect in order to determine whether or not an emergency number * is being dialed * @return True if the handle is an emergency number. */ private boolean isEmergencyNumber(String number) { Log.v(this, "Checking restrictions for number : %s", Log.pii(number)); if (number == null) return false; try { return mContext.getSystemService(TelephonyManager.class).isEmergencyNumber( number); } catch (UnsupportedOperationException uoe) { Log.w(this, "isEmergencyNumber: Telephony not supported"); return false; } catch (Exception e) { Log.e(this, e, "isEmergencyNumber: Telephony threw an exception."); return false; } } /** * Given a call intent and whether or not the number to dial is an emergency number, determine * the appropriate call intent action. * * @param intent Intent to evaluate * @param isEmergencyNumber Whether or not the number is an emergency * number. * @return The appropriate action. */ private String calculateCallIntentAction(Intent intent, boolean isEmergencyNumber) { String action = intent.getAction(); /* Change CALL_PRIVILEGED into CALL or CALL_EMERGENCY as needed. */ if (Intent.ACTION_CALL_PRIVILEGED.equals(action)) { if (isEmergencyNumber) { Log.i(this, "ACTION_CALL_PRIVILEGED is used while the number is a" + " emergency number. Using ACTION_CALL_EMERGENCY as an action instead."); action = Intent.ACTION_CALL_EMERGENCY; } else { action = Intent.ACTION_CALL; } Log.v(this, " - updating action from CALL_PRIVILEGED to %s", action); } return action; } private long getDisconnectTimeoutFromApp(Bundle resultExtras, long defaultTimeout) { if (resultExtras != null) { long disconnectTimeout = resultExtras.getLong( TelecomManager.EXTRA_NEW_OUTGOING_CALL_CANCEL_TIMEOUT, defaultTimeout); if (disconnectTimeout < 0) { disconnectTimeout = 0; } return Math.min(disconnectTimeout, Timeouts.getMaxNewOutgoingCallCancelMillis(mContext.getContentResolver())); } else { return defaultTimeout; } } }