| /* |
| * 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.telecomm; |
| |
| import android.app.Activity; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.res.Resources; |
| import android.net.Uri; |
| import android.os.UserHandle; |
| import android.telecomm.GatewayInfo; |
| import android.telecomm.TelecommManager; |
| import android.telecomm.VideoProfile; |
| import android.telephony.DisconnectCause; |
| import android.telephony.PhoneNumberUtils; |
| import android.text.TextUtils; |
| |
| /** |
| * 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. |
| */ |
| class NewOutgoingCallIntentBroadcaster { |
| /** Required permission for any app that wants to consume ACTION_NEW_OUTGOING_CALL. */ |
| private static final String PERMISSION = android.Manifest.permission.PROCESS_OUTGOING_CALLS; |
| |
| private static final String EXTRA_ACTUAL_NUMBER_TO_DIAL = |
| "android.telecomm.extra.ACTUAL_NUMBER_TO_DIAL"; |
| |
| /** |
| * 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"; |
| public static final String EXTRA_GATEWAY_ORIGINAL_URI = |
| "com.android.phone.extra.GATEWAY_ORIGINAL_URI"; |
| |
| private static final String SCHEME_TEL = "tel"; |
| private static final String SCHEME_SIP = "sip"; |
| private static final String SCHEME_VOICEMAIL = "voicemail"; |
| |
| private final CallsManager mCallsManager; |
| private final Call mCall; |
| private final Intent mIntent; |
| /* |
| * 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; |
| |
| NewOutgoingCallIntentBroadcaster(CallsManager callsManager, Call call, Intent intent, |
| boolean isDefaultPhoneApp) { |
| mCallsManager = callsManager; |
| mCall = call; |
| mIntent = intent; |
| mIsDefaultOrSystemPhoneApp = isDefaultPhoneApp; |
| } |
| |
| /** |
| * Processes the result of the outgoing call broadcast intent, and performs callbacks to |
| * the OutgoingCallIntentBroadcasterListener as necessary. |
| */ |
| private class NewOutgoingCallBroadcastIntentReceiver extends BroadcastReceiver { |
| |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| 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 resultHandle = getResultData(); |
| Log.v(this, "- got number from resultData: %s", Log.pii(resultHandle)); |
| |
| boolean endEarly = false; |
| if (resultHandle == null) { |
| Log.v(this, "Call cancelled (null number), returning..."); |
| endEarly = true; |
| } else if (PhoneNumberUtils.isPotentialLocalEmergencyNumber(context, resultHandle)) { |
| Log.w(this, "Cannot modify outgoing call to emergency number %s.", resultHandle); |
| endEarly = true; |
| } |
| |
| if (endEarly) { |
| if (mCall != null) { |
| mCall.disconnect(); |
| } |
| return; |
| } |
| |
| Uri resultHandleUri = Uri.fromParts( |
| PhoneNumberUtils.isUriNumber(resultHandle) ? SCHEME_SIP : SCHEME_TEL, |
| resultHandle, |
| null); |
| |
| Uri originalUri = mIntent.getData(); |
| |
| if (originalUri.getSchemeSpecificPart().equals(resultHandle)) { |
| Log.v(this, "Call handle 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); |
| mCallsManager.placeOutgoingCall(mCall, resultHandleUri, gatewayInfo, |
| mIntent.getBooleanExtra(TelecommManager.EXTRA_START_CALL_WITH_SPEAKERPHONE, |
| false), |
| mIntent.getIntExtra(TelecommManager.EXTRA_START_CALL_WITH_VIDEO_STATE, |
| VideoProfile.VideoState.AUDIO_ONLY)); |
| } |
| } |
| |
| /** |
| * 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 CallActivity#OUTGOING_CALL_SUCCEEDED} if the call succeeded, and an |
| * appropriate {@link DisconnectCause} if the call did not, describing why it failed. |
| */ |
| int processIntent() { |
| Log.v(this, "Processing call intent in OutgoingCallIntentBroadcaster."); |
| |
| final Context context = TelecommApp.getInstance(); |
| Intent intent = mIntent; |
| |
| String handle = PhoneNumberUtils.getNumberFromIntent(intent, context); |
| |
| if (TextUtils.isEmpty(handle)) { |
| final Uri data = intent.getData(); |
| if (data != null && SCHEME_VOICEMAIL.equals(data.getScheme())) { |
| Log.w(this, "Voicemail scheme provided but no voicemail number set."); |
| return DisconnectCause.VOICEMAIL_NUMBER_MISSING; |
| } else { |
| Log.w(this, "Empty handle obtained from the call intent."); |
| return DisconnectCause.INVALID_NUMBER; |
| } |
| } |
| |
| boolean isUriNumber = PhoneNumberUtils.isUriNumber(handle); |
| |
| if (!isUriNumber) { |
| handle = PhoneNumberUtils.convertKeypadLettersToDigits(handle); |
| handle = PhoneNumberUtils.stripSeparators(handle); |
| } |
| |
| final boolean isPotentialEmergencyNumber = isPotentialEmergencyNumber(context, handle); |
| Log.v(this, "isPotentialEmergencyNumber = %s", isPotentialEmergencyNumber); |
| |
| rewriteCallIntentAction(intent, isPotentialEmergencyNumber); |
| // True for certain types of numbers that are not intended to be intercepted or modified |
| // by third parties (e.g. emergency numbers). |
| boolean callImmediately = false; |
| |
| String action = intent.getAction(); |
| if (Intent.ACTION_CALL.equals(action)) { |
| if (isPotentialEmergencyNumber) { |
| if (!mIsDefaultOrSystemPhoneApp) { |
| Log.w(this, "Cannot call potential emergency number %s with CALL Intent %s " |
| + "unless caller is system or default dialer.", handle, intent); |
| launchSystemDialer(context, intent.getData()); |
| return DisconnectCause.OUTGOING_CANCELED; |
| } else { |
| callImmediately = true; |
| } |
| } |
| } else if (Intent.ACTION_CALL_EMERGENCY.equals(action)) { |
| if (!isPotentialEmergencyNumber) { |
| Log.w(this, "Cannot call non-potential-emergency number %s with EMERGENCY_CALL " |
| + "Intent %s.", handle, intent); |
| return DisconnectCause.OUTGOING_CANCELED; |
| } |
| callImmediately = true; |
| } else { |
| Log.w(this, "Unhandled Intent %s. Ignoring and not placing call.", intent); |
| return DisconnectCause.INVALID_NUMBER; |
| } |
| |
| if (callImmediately) { |
| Log.i(this, "Placing call immediately instead of waiting for " |
| + " OutgoingCallBroadcastReceiver: %s", intent); |
| String scheme = isUriNumber ? SCHEME_SIP : SCHEME_TEL; |
| boolean speakerphoneOn = mIntent.getBooleanExtra( |
| TelecommManager.EXTRA_START_CALL_WITH_SPEAKERPHONE, false); |
| int videoState = mIntent.getIntExtra( |
| TelecommManager.EXTRA_START_CALL_WITH_VIDEO_STATE, |
| VideoProfile.VideoState.AUDIO_ONLY); |
| mCallsManager.placeOutgoingCall(mCall, Uri.fromParts(scheme, handle, null), null, |
| speakerphoneOn, videoState); |
| |
| // 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. |
| } |
| |
| broadcastIntent(intent, handle, context, !callImmediately); |
| return DisconnectCause.NOT_DISCONNECTED; |
| } |
| |
| /** |
| * 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 handle Call handle that was stored in the original call intent. |
| * @param context Valid context to send the ordered broadcast using. |
| * @param receiverRequired Whether or not the result from the ordered broadcast should be |
| * processed using a {@link NewOutgoingCallIntentBroadcaster}. |
| */ |
| private void broadcastIntent( |
| Intent originalCallIntent, |
| String handle, |
| Context context, |
| boolean receiverRequired) { |
| Intent broadcastIntent = new Intent(Intent.ACTION_NEW_OUTGOING_CALL); |
| if (handle != null) { |
| broadcastIntent.putExtra(Intent.EXTRA_PHONE_NUMBER, handle); |
| } |
| |
| // 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); |
| Log.v(this, "Broadcasting intent: %s.", broadcastIntent); |
| |
| checkAndCopyProviderExtras(originalCallIntent, broadcastIntent); |
| |
| context.sendOrderedBroadcastAsUser( |
| broadcastIntent, |
| UserHandle.OWNER, |
| PERMISSION, |
| receiverRequired ? new NewOutgoingCallBroadcastIntentReceiver() : null, |
| null, // scheduler |
| Activity.RESULT_OK, // initialCode |
| handle, // 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 launchSystemDialer(Context context, Uri handle) { |
| Intent systemDialerIntent = new Intent(); |
| final Resources resources = context.getResources(); |
| systemDialerIntent.setClassName( |
| resources.getString(R.string.ui_default_package), |
| resources.getString(R.string.dialer_default_class)); |
| 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); |
| context.startActivity(systemDialerIntent); |
| } |
| |
| /** |
| * 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. |
| * |
| * To prevent malicious 3rd party apps from making emergency calls by passing in an |
| * "invalid" number like "9111234" (that isn't technically an emergency number but might |
| * still result in an emergency call with some networks), we use |
| * isPotentialLocalEmergencyNumber instead of isLocalEmergencyNumber. |
| * |
| * @param context Valid context |
| * @param handle Handle to inspect in order to determine whether or not an emergency number |
| * is potentially being dialed |
| * @return True if the handle is potentially an emergency number. |
| */ |
| private boolean isPotentialEmergencyNumber(Context context, String handle) { |
| Log.v(this, "Checking restrictions for number : %s", Log.pii(handle)); |
| return (handle != null) && PhoneNumberUtils.isPotentialLocalEmergencyNumber(context,handle); |
| } |
| |
| /** |
| * Given a call intent and whether or not the number to dial is an emergency number, rewrite |
| * the call intent action to an appropriate one. |
| * |
| * @param intent Intent to rewrite the action for |
| * @param isPotentialEmergencyNumber Whether or not the handle is potentially an emergency |
| * number. |
| */ |
| private void rewriteCallIntentAction(Intent intent, boolean isPotentialEmergencyNumber) { |
| if (CallActivity.class.getName().equals(intent.getComponent().getClassName())) { |
| // If we were launched directly from the CallActivity, not one of its more privileged |
| // aliases, then make sure that only the non-privileged actions are allowed. |
| if (!Intent.ACTION_CALL.equals(intent.getAction())) { |
| Log.w(this, "Attempt to deliver non-CALL action; forcing to CALL"); |
| intent.setAction(Intent.ACTION_CALL); |
| } |
| } |
| |
| String action = intent.getAction(); |
| |
| /* Change CALL_PRIVILEGED into CALL or CALL_EMERGENCY as needed. */ |
| if (Intent.ACTION_CALL_PRIVILEGED.equals(action)) { |
| if (isPotentialEmergencyNumber) { |
| Log.i(this, "ACTION_CALL_PRIVILEGED is used while the number is a potential" |
| + " 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); |
| intent.setAction(action); |
| } |
| } |
| } |