nxpandroid | 34627bd | 2016-05-27 15:52:30 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package com.android.nfc.cardemulation; |
| 17 | |
| 18 | import java.io.FileDescriptor; |
| 19 | import java.io.PrintWriter; |
| 20 | |
| 21 | import com.android.nfc.ForegroundUtils; |
| 22 | |
| 23 | import android.app.ActivityManager; |
| 24 | import android.content.ComponentName; |
| 25 | import android.content.Context; |
| 26 | import android.nfc.cardemulation.NfcFServiceInfo; |
| 27 | import android.os.Handler; |
| 28 | import android.os.Looper; |
| 29 | import android.util.Log; |
nxf50051 | 3a018e7 | 2019-04-23 17:11:41 +0530 | [diff] [blame] | 30 | import android.os.SystemProperties; |
nxpandroid | 34627bd | 2016-05-27 15:52:30 +0530 | [diff] [blame] | 31 | |
| 32 | public class EnabledNfcFServices implements com.android.nfc.ForegroundUtils.Callback { |
| 33 | static final String TAG = "EnabledNfcFCardEmulationServices"; |
nxf50051 | 3a018e7 | 2019-04-23 17:11:41 +0530 | [diff] [blame] | 34 | static final boolean DBG = ((SystemProperties.get("persist.nfc.ce_debug").equals("1")) ? true : false); |
nxpandroid | 34627bd | 2016-05-27 15:52:30 +0530 | [diff] [blame] | 35 | |
| 36 | final Context mContext; |
| 37 | final RegisteredNfcFServicesCache mNfcFServiceCache; |
| 38 | final RegisteredT3tIdentifiersCache mT3tIdentifiersCache; |
| 39 | final Callback mCallback; |
| 40 | final ForegroundUtils mForegroundUtils = ForegroundUtils.getInstance(); |
| 41 | final Handler mHandler = new Handler(Looper.getMainLooper()); |
| 42 | |
| 43 | final Object mLock = new Object(); |
| 44 | // Variables below synchronized on mLock |
| 45 | ComponentName mForegroundComponent = null; // The computed enabled foreground component |
| 46 | ComponentName mForegroundRequested = null; // The component requested to be enabled by fg app |
| 47 | int mForegroundUid = -1; // The UID of the fg app, or -1 if fg app didn't request |
| 48 | |
| 49 | boolean mComputeFgRequested = false; |
| 50 | boolean mActivated = false; |
| 51 | |
| 52 | public interface Callback { |
| 53 | void onEnabledForegroundNfcFServiceChanged(ComponentName service); |
| 54 | } |
| 55 | |
| 56 | public EnabledNfcFServices(Context context, |
| 57 | RegisteredNfcFServicesCache nfcFServiceCache, |
| 58 | RegisteredT3tIdentifiersCache t3tIdentifiersCache, Callback callback) { |
| 59 | if (DBG) Log.d(TAG, "EnabledNfcFServices"); |
| 60 | mContext = context; |
| 61 | mNfcFServiceCache = nfcFServiceCache; |
| 62 | mT3tIdentifiersCache = t3tIdentifiersCache; |
| 63 | mCallback = callback; |
| 64 | } |
| 65 | |
| 66 | void computeEnabledForegroundService() { |
| 67 | if (DBG) Log.d(TAG, "computeEnabledForegroundService"); |
| 68 | ComponentName foregroundRequested = null; |
| 69 | boolean changed = false; |
| 70 | synchronized (mLock) { |
| 71 | if (mActivated) { |
| 72 | Log.d(TAG, "configuration will be postponed until deactivation"); |
| 73 | mComputeFgRequested = true; |
| 74 | return; |
| 75 | } |
| 76 | mComputeFgRequested = false; |
| 77 | foregroundRequested = mForegroundRequested; |
| 78 | if (mForegroundRequested != null && |
| 79 | (mForegroundComponent == null || |
| 80 | !mForegroundRequested.equals(mForegroundComponent))) { |
| 81 | mForegroundComponent = mForegroundRequested; |
| 82 | changed = true; |
| 83 | } else if (mForegroundRequested == null && mForegroundComponent != null){ |
| 84 | mForegroundComponent = mForegroundRequested; |
| 85 | changed = true; |
| 86 | } |
| 87 | } |
| 88 | // Notify if anything changed |
| 89 | if (changed) { |
| 90 | mCallback.onEnabledForegroundNfcFServiceChanged(foregroundRequested); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | public void onServicesUpdated() { |
| 95 | if (DBG) Log.d(TAG, "onServicesUpdated"); |
| 96 | // If enabled foreground service is set, remove it |
| 97 | boolean changed = false; |
| 98 | synchronized (mLock) { |
| 99 | if (mForegroundComponent != null) { |
| 100 | Log.d(TAG, "Removing foreground enabled service because of service update."); |
| 101 | mForegroundRequested = null; |
| 102 | mForegroundUid = -1; |
| 103 | changed = true; |
| 104 | } |
| 105 | } |
| 106 | if (changed) { |
| 107 | computeEnabledForegroundService(); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | public boolean registerEnabledForegroundService(ComponentName service, int callingUid) { |
| 112 | if (DBG) Log.d(TAG, "registerEnabledForegroundService"); |
| 113 | boolean success = false; |
| 114 | synchronized (mLock) { |
| 115 | NfcFServiceInfo serviceInfo = mNfcFServiceCache.getService( |
| 116 | ActivityManager.getCurrentUser(), service); |
| 117 | if (serviceInfo == null) { |
| 118 | return false; |
| 119 | } else { |
| 120 | if (serviceInfo.getSystemCode().equalsIgnoreCase("NULL") || |
nxpandroid | 6fd9cdb | 2017-07-12 18:25:41 +0530 | [diff] [blame] | 121 | serviceInfo.getNfcid2().equalsIgnoreCase("NULL") || |
| 122 | serviceInfo.getT3tPmm().equalsIgnoreCase("NULL")) { |
nxpandroid | 34627bd | 2016-05-27 15:52:30 +0530 | [diff] [blame] | 123 | return false; |
| 124 | } |
| 125 | } |
| 126 | if (service.equals(mForegroundRequested)) { |
| 127 | Log.e(TAG, "The servcie is already requested to the foreground service."); |
| 128 | return true; |
| 129 | } |
| 130 | if (mForegroundUtils.registerUidToBackgroundCallback(this, callingUid)) { |
| 131 | mForegroundRequested = service; |
| 132 | mForegroundUid = callingUid; |
| 133 | success = true; |
| 134 | } else { |
| 135 | Log.e(TAG, "Calling UID is not in the foreground, ignorning!"); |
| 136 | } |
| 137 | } |
| 138 | if (success) { |
| 139 | computeEnabledForegroundService(); |
| 140 | } |
| 141 | return success; |
| 142 | } |
| 143 | |
| 144 | boolean unregisterForegroundService(int uid) { |
| 145 | if (DBG) Log.d(TAG, "unregisterForegroundService"); |
| 146 | boolean success = false; |
| 147 | synchronized (mLock) { |
| 148 | if (mForegroundUid == uid) { |
| 149 | mForegroundRequested = null; |
| 150 | mForegroundUid = -1; |
| 151 | success = true; |
| 152 | } // else, other UID in foreground |
| 153 | } |
| 154 | if (success) { |
| 155 | computeEnabledForegroundService(); |
| 156 | } |
| 157 | return success; |
| 158 | } |
| 159 | |
| 160 | public boolean unregisteredEnabledForegroundService(int callingUid) { |
| 161 | if (DBG) Log.d(TAG, "unregisterEnabledForegroundService"); |
| 162 | // Verify the calling UID is in the foreground |
| 163 | if (mForegroundUtils.isInForeground(callingUid)) { |
| 164 | return unregisterForegroundService(callingUid); |
| 165 | } else { |
| 166 | Log.e(TAG, "Calling UID is not in the foreground, ignorning!"); |
| 167 | return false; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | @Override |
| 172 | public void onUidToBackground(int uid) { |
| 173 | if (DBG) Log.d(TAG, "onUidToBackground"); |
| 174 | unregisterForegroundService(uid); |
| 175 | } |
| 176 | |
| 177 | public void onHostEmulationActivated() { |
| 178 | if (DBG) Log.d(TAG, "onHostEmulationActivated"); |
| 179 | synchronized (mLock) { |
| 180 | mActivated = true; |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | public void onHostEmulationDeactivated() { |
| 185 | if (DBG) Log.d(TAG, "onHostEmulationDeactivated"); |
| 186 | boolean needComputeFg = false; |
| 187 | synchronized (mLock) { |
| 188 | mActivated = false; |
| 189 | if (mComputeFgRequested) { |
| 190 | needComputeFg = true; |
| 191 | } |
| 192 | } |
| 193 | if (needComputeFg) { |
| 194 | Log.d(TAG, "do postponed configuration"); |
| 195 | computeEnabledForegroundService(); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | public void onNfcDisabled() { |
| 200 | synchronized (mLock) { |
| 201 | mForegroundComponent = null; |
| 202 | mForegroundRequested = null; |
| 203 | mActivated = false; |
| 204 | mComputeFgRequested = false; |
| 205 | mForegroundUid = -1; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | public void onUserSwitched(int userId) { |
| 210 | synchronized (mLock) { |
| 211 | mForegroundComponent = null; |
| 212 | mForegroundRequested = null; |
| 213 | mActivated = false; |
| 214 | mComputeFgRequested = false; |
| 215 | mForegroundUid = -1; |
| 216 | } |
| 217 | } |
| 218 | |
| 219 | public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| 220 | } |
| 221 | } |