375 lines
15 KiB
Java
375 lines
15 KiB
Java
/*
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* Copyright (C) 2015 The Android Open Source Project
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* Copyright (C) 2024 The LineageOS Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.support.v7.mms;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.net.ConnectivityManager;
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import android.net.NetworkInfo;
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import android.os.SystemClock;
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import android.util.Log;
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import java.lang.reflect.Method;
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import java.util.Timer;
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import java.util.TimerTask;
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/**
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* Class manages MMS network connectivity using legacy platform APIs
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* (deprecated since Android L) on pre-L devices (or when forced to
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* be used on L and later)
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*/
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class MmsNetworkManager {
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// Hidden platform constants
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private static final String FEATURE_ENABLE_MMS = "enableMMS";
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private static final String REASON_VOICE_CALL_ENDED = "2GVoiceCallEnded";
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private static final int APN_ALREADY_ACTIVE = 0;
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private static final int APN_REQUEST_STARTED = 1;
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private static final int APN_TYPE_NOT_AVAILABLE = 2;
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private static final int APN_REQUEST_FAILED = 3;
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private static final int APN_ALREADY_INACTIVE = 4;
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// A map from platform APN constant to text string
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private static final String[] APN_RESULT_STRING = new String[]{
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"already active",
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"request started",
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"type not available",
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"request failed",
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"already inactive",
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"unknown",
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};
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private static final long NETWORK_ACQUIRE_WAIT_INTERVAL_MS = 15000;
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private static final long DEFAULT_NETWORK_ACQUIRE_TIMEOUT_MS = 180000;
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private static final String MMS_NETWORK_EXTENSION_TIMER = "mms_network_extension_timer";
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private static final long MMS_NETWORK_EXTENSION_TIMER_WAIT_MS = 30000;
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private static volatile long sNetworkAcquireTimeoutMs = DEFAULT_NETWORK_ACQUIRE_TIMEOUT_MS;
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/**
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* Set the network acquire timeout
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*
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* @param timeoutMs timeout in millisecond
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*/
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static void setNetworkAcquireTimeout(final long timeoutMs) {
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sNetworkAcquireTimeoutMs = timeoutMs;
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}
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private final Context mContext;
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private final ConnectivityManager mConnectivityManager;
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// If the connectivity intent receiver is registered
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private boolean mReceiverRegistered;
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// Count of requests that are using the MMS network
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private int mUseCount;
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// Count of requests that are waiting for connectivity (i.e. in acquireNetwork wait loop)
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private int mWaitCount;
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// Timer to extend the network connectivity
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private Timer mExtensionTimer;
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private final MmsHttpClient mHttpClient;
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private final IntentFilter mConnectivityIntentFilter;
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private final BroadcastReceiver mConnectivityChangeReceiver = new BroadcastReceiver() {
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@Override
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public void onReceive(final Context context, final Intent intent) {
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if (!ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {
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return;
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}
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final int networkType = getConnectivityChangeNetworkType(intent);
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if (networkType != ConnectivityManager.TYPE_MOBILE_MMS) {
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return;
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}
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onMmsConnectivityChange(context, intent);
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}
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};
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MmsNetworkManager(final Context context) {
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mContext = context;
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mConnectivityManager = (ConnectivityManager) mContext.getSystemService(
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Context.CONNECTIVITY_SERVICE);
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mHttpClient = new MmsHttpClient(mContext);
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mConnectivityIntentFilter = new IntentFilter();
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mConnectivityIntentFilter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
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mUseCount = 0;
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mWaitCount = 0;
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}
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ConnectivityManager getConnectivityManager() {
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return mConnectivityManager;
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}
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MmsHttpClient getHttpClient() {
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return mHttpClient;
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}
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/**
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* Synchronously acquire MMS network connectivity
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*
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* @throws MmsNetworkException If failed permanently or timed out
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*/
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void acquireNetwork() throws MmsNetworkException {
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Log.i(MmsService.TAG, "Acquire MMS network");
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synchronized (this) {
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try {
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mUseCount++;
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mWaitCount++;
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if (mWaitCount == 1) {
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// Register the receiver for the first waiting request
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registerConnectivityChangeReceiverLocked();
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}
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long waitMs = sNetworkAcquireTimeoutMs;
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final long beginMs = SystemClock.elapsedRealtime();
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do {
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if (!isMobileDataEnabled()) {
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// Fast fail if mobile data is not enabled
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throw new MmsNetworkException("Mobile data is disabled");
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}
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// Always try to extend and check the MMS network connectivity
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// before we start waiting to make sure we don't miss the change
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// of MMS connectivity. As one example, some devices fail to send
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// connectivity change intent. So this would make sure we catch
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// the state change.
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if (extendMmsConnectivityLocked()) {
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// Connected
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return;
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}
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try {
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wait(Math.min(waitMs, NETWORK_ACQUIRE_WAIT_INTERVAL_MS));
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} catch (final InterruptedException e) {
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Log.w(MmsService.TAG, "Unexpected exception", e);
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}
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// Calculate the remaining time to wait
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waitMs = sNetworkAcquireTimeoutMs - (SystemClock.elapsedRealtime() - beginMs);
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} while (waitMs > 0);
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// Last check
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if (extendMmsConnectivityLocked()) {
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return;
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} else {
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// Reaching here means timed out.
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throw new MmsNetworkException("Acquiring MMS network timed out");
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}
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} finally {
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mWaitCount--;
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if (mWaitCount == 0) {
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// Receiver is used to listen to connectivity change and unblock
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// the waiting requests. If nobody's waiting on change, there is
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// no need for the receiver. The auto extension timer will try
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// to maintain the connectivity periodically.
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unregisterConnectivityChangeReceiverLocked();
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}
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}
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}
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}
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/**
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* Release MMS network connectivity. This is ref counted. So it only disconnect
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* when the ref count is 0.
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*/
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void releaseNetwork() {
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Log.i(MmsService.TAG, "release MMS network");
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synchronized (this) {
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mUseCount--;
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if (mUseCount == 0) {
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stopNetworkExtensionTimerLocked();
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endMmsConnectivity();
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}
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}
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}
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String getApnName() {
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String apnName = null;
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final NetworkInfo mmsNetworkInfo = mConnectivityManager.getNetworkInfo(
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ConnectivityManager.TYPE_MOBILE_MMS);
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if (mmsNetworkInfo != null) {
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apnName = mmsNetworkInfo.getExtraInfo();
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}
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return apnName;
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}
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// Process mobile MMS connectivity change, waking up the waiting request thread
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// in certain conditions:
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// - Successfully connected
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// - Failed permanently
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// - Required another kickoff
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// We don't initiate connection here but just notifyAll so the waiting request
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// would wake up and retry connection before next wait.
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private void onMmsConnectivityChange(final Context context, final Intent intent) {
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if (mUseCount < 1) {
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return;
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}
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final NetworkInfo mmsNetworkInfo =
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mConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_MMS);
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// Check availability of the mobile network.
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if (mmsNetworkInfo != null) {
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if (REASON_VOICE_CALL_ENDED.equals(mmsNetworkInfo.getReason())) {
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// This is a very specific fix to handle the case where the phone receives an
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// incoming call during the time we're trying to setup the mms connection.
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// When the call ends, restart the process of mms connectivity.
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// Once the waiting request is unblocked, before the next wait, we would start
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// MMS network again.
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unblockWait();
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} else {
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final NetworkInfo.State state = mmsNetworkInfo.getState();
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if (state == NetworkInfo.State.CONNECTED ||
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(state == NetworkInfo.State.DISCONNECTED && !isMobileDataEnabled())) {
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// Unblock the waiting request when we either connected
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// OR
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// disconnected due to mobile data disabled therefore needs to fast fail
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// (on some devices if mobile data disabled and starting MMS would cause
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// an immediate state change to disconnected, so causing a tight loop of
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// trying and failing)
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// Once the waiting request is unblocked, before the next wait, we would
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// check mobile data and start MMS network again. So we should catch
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// both the success and the fast failure.
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unblockWait();
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}
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}
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}
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}
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private void unblockWait() {
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synchronized (this) {
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notifyAll();
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}
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}
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private void startNetworkExtensionTimerLocked() {
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if (mExtensionTimer == null) {
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mExtensionTimer = new Timer(MMS_NETWORK_EXTENSION_TIMER, true/*daemon*/);
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mExtensionTimer.schedule(
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new TimerTask() {
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@Override
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public void run() {
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synchronized (this) {
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if (mUseCount > 0) {
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try {
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// Try extending the connectivity
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extendMmsConnectivityLocked();
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} catch (final MmsNetworkException e) {
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// Ignore the exception
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}
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}
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}
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}
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},
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MMS_NETWORK_EXTENSION_TIMER_WAIT_MS);
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}
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}
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private void stopNetworkExtensionTimerLocked() {
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if (mExtensionTimer != null) {
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mExtensionTimer.cancel();
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mExtensionTimer = null;
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}
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}
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private boolean extendMmsConnectivityLocked() throws MmsNetworkException {
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final int result = startMmsConnectivity();
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if (result == APN_ALREADY_ACTIVE) {
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// Already active
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startNetworkExtensionTimerLocked();
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return true;
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} else if (result != APN_REQUEST_STARTED) {
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stopNetworkExtensionTimerLocked();
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throw new MmsNetworkException("Cannot acquire MMS network: " +
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result + " - " + getMmsConnectivityResultString(result));
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}
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return false;
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}
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private int startMmsConnectivity() {
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Log.i(MmsService.TAG, "Start MMS connectivity");
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try {
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final Method method = mConnectivityManager.getClass().getMethod(
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"startUsingNetworkFeature", Integer.TYPE, String.class);
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if (method != null) {
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return (Integer) method.invoke(
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mConnectivityManager, ConnectivityManager.TYPE_MOBILE, FEATURE_ENABLE_MMS);
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}
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} catch (final Exception e) {
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Log.w(MmsService.TAG, "ConnectivityManager.startUsingNetworkFeature failed " + e);
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}
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return APN_REQUEST_FAILED;
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}
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private void endMmsConnectivity() {
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Log.i(MmsService.TAG, "End MMS connectivity");
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try {
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final Method method = mConnectivityManager.getClass().getMethod(
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"stopUsingNetworkFeature", Integer.TYPE, String.class);
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if (method != null) {
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method.invoke(
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mConnectivityManager, ConnectivityManager.TYPE_MOBILE, FEATURE_ENABLE_MMS);
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}
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} catch (final Exception e) {
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Log.w(MmsService.TAG, "ConnectivityManager.stopUsingNetworkFeature failed " + e);
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}
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}
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private void registerConnectivityChangeReceiverLocked() {
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if (!mReceiverRegistered) {
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mContext.registerReceiver(mConnectivityChangeReceiver, mConnectivityIntentFilter,
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Context.RECEIVER_EXPORTED/*UNAUDITED*/);
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mReceiverRegistered = true;
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}
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}
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private void unregisterConnectivityChangeReceiverLocked() {
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if (mReceiverRegistered) {
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mContext.unregisterReceiver(mConnectivityChangeReceiver);
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mReceiverRegistered = false;
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}
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}
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/**
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* The absence of a connection type.
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*/
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private static final int TYPE_NONE = -1;
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/**
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* Get the network type of the connectivity change
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*
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* @param intent the broadcast intent of connectivity change
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* @return The change's network type
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*/
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private static int getConnectivityChangeNetworkType(final Intent intent) {
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return intent.getIntExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, TYPE_NONE);
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}
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private static String getMmsConnectivityResultString(int result) {
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if (result < 0 || result >= APN_RESULT_STRING.length) {
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result = APN_RESULT_STRING.length - 1;
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}
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return APN_RESULT_STRING[result];
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}
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private boolean isMobileDataEnabled() {
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try {
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final Class cmClass = mConnectivityManager.getClass();
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final Method method = cmClass.getDeclaredMethod("getMobileDataEnabled");
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method.setAccessible(true); // Make the method callable
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// get the setting for "mobile data"
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return (Boolean) method.invoke(mConnectivityManager);
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} catch (final Exception e) {
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Log.w(MmsService.TAG, "TelephonyManager.getMobileDataEnabled failed", e);
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}
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return false;
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}
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}
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