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/*
* 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.internal.telephony;
import android.annotation.Nullable;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Binder;
import android.os.PersistableBundle;
import android.telephony.CarrierConfigManager;
import com.android.telephony.Rlog;
import java.util.List;
/**
* This is a basic utility class for common Carrier SMS Functions
*/
public class CarrierSmsUtils {
protected static final boolean VDBG = false;
protected static final String TAG = CarrierSmsUtils.class.getSimpleName();
private static final String CARRIER_IMS_PACKAGE_KEY =
CarrierConfigManager.KEY_CONFIG_IMS_PACKAGE_OVERRIDE_STRING;
/** Return a Carrier-overridden IMS package, if it exists and is a CarrierSmsFilter
*
* @param context calling context
* @param phone object from telephony
* @param intent that should match a CarrierSmsFilter
* @return the name of the IMS CarrierService package
*/
@Nullable
public static String getCarrierImsPackageForIntent(
Context context, Phone phone, Intent intent) {
String carrierImsPackage = getCarrierImsPackage(context, phone);
if (carrierImsPackage == null) {
if (VDBG) Rlog.v(TAG, "No CarrierImsPackage override found");
return null;
}
PackageManager packageManager = context.getPackageManager();
List<ResolveInfo> receivers = packageManager.queryIntentServices(intent, 0);
for (ResolveInfo info : receivers) {
if (info.serviceInfo == null) {
Rlog.e(TAG, "Can't get service information from " + info);
continue;
}
if (carrierImsPackage.equals(info.serviceInfo.packageName)) {
return carrierImsPackage;
}
}
return null;
}
@Nullable
private static String getCarrierImsPackage(Context context, Phone phone) {
CarrierConfigManager cm = (CarrierConfigManager) context.getSystemService(
Context.CARRIER_CONFIG_SERVICE);
if (cm == null) {
Rlog.e(TAG, "Failed to retrieve CarrierConfigManager");
return null;
}
final long identity = Binder.clearCallingIdentity();
try {
PersistableBundle config = cm.getConfigForSubId(phone.getSubId());
if (config == null) {
if (VDBG) Rlog.v(TAG, "No CarrierConfig for subId:" + phone.getSubId());
return null;
}
return config.getString(CARRIER_IMS_PACKAGE_KEY, null);
} finally {
Binder.restoreCallingIdentity(identity);
}
}
private CarrierSmsUtils() {}
}
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