Jaikumar Ganesh | 15c7439 | 2010-12-21 22:31:44 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | |
| 17 | package android.bluetooth; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.net.ConnectivityManager; |
| 21 | import android.net.DhcpInfo; |
| 22 | import android.net.LinkAddress; |
| 23 | import android.net.LinkCapabilities; |
| 24 | import android.net.LinkProperties; |
| 25 | import android.net.NetworkInfo; |
| 26 | import android.net.NetworkInfo.DetailedState; |
| 27 | import android.net.NetworkStateTracker; |
| 28 | import android.net.NetworkUtils; |
| 29 | import android.os.Handler; |
| 30 | import android.os.Message; |
| 31 | import android.util.Log; |
| 32 | |
| 33 | import java.net.InetAddress; |
| 34 | import java.util.concurrent.atomic.AtomicBoolean; |
| 35 | import java.util.concurrent.atomic.AtomicInteger; |
| 36 | |
| 37 | /** |
| 38 | * This class tracks the data connection associated with Bluetooth |
| 39 | * reverse tethering. This is a singleton class and an instance will be |
| 40 | * created by ConnectivityService. BluetoothService will call into this |
| 41 | * when a reverse tethered connection needs to be activated. |
| 42 | * |
| 43 | * @hide |
| 44 | */ |
| 45 | public class BluetoothTetheringDataTracker implements NetworkStateTracker { |
| 46 | private static final String NETWORKTYPE = "BLUETOOTH_TETHER"; |
| 47 | private static final String TAG = "BluetoothTethering"; |
| 48 | |
| 49 | private AtomicBoolean mTeardownRequested = new AtomicBoolean(false); |
| 50 | private AtomicBoolean mPrivateDnsRouteSet = new AtomicBoolean(false); |
| 51 | private AtomicInteger mDefaultGatewayAddr = new AtomicInteger(0); |
| 52 | private AtomicBoolean mDefaultRouteSet = new AtomicBoolean(false); |
| 53 | |
| 54 | private LinkProperties mLinkProperties; |
| 55 | private LinkCapabilities mLinkCapabilities; |
| 56 | private NetworkInfo mNetworkInfo; |
| 57 | |
| 58 | private BluetoothPan mBluetoothPan; |
| 59 | private BluetoothDevice mDevice; |
| 60 | private static String mIface; |
| 61 | |
| 62 | /* For sending events to connectivity service handler */ |
| 63 | private Handler mCsHandler; |
| 64 | private Context mContext; |
| 65 | public static BluetoothTetheringDataTracker sInstance; |
| 66 | |
| 67 | private BluetoothTetheringDataTracker() { |
| 68 | mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_BLUETOOTH, 0, NETWORKTYPE, ""); |
| 69 | mLinkProperties = new LinkProperties(); |
| 70 | mLinkCapabilities = new LinkCapabilities(); |
| 71 | |
| 72 | mNetworkInfo.setIsAvailable(false); |
| 73 | setTeardownRequested(false); |
| 74 | } |
| 75 | |
| 76 | public static synchronized BluetoothTetheringDataTracker getInstance() { |
| 77 | if (sInstance == null) sInstance = new BluetoothTetheringDataTracker(); |
| 78 | return sInstance; |
| 79 | } |
| 80 | |
| 81 | public Object Clone() throws CloneNotSupportedException { |
| 82 | throw new CloneNotSupportedException(); |
| 83 | } |
| 84 | |
| 85 | public void setTeardownRequested(boolean isRequested) { |
| 86 | mTeardownRequested.set(isRequested); |
| 87 | } |
| 88 | |
| 89 | public boolean isTeardownRequested() { |
| 90 | return mTeardownRequested.get(); |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Begin monitoring connectivity |
| 95 | */ |
| 96 | public void startMonitoring(Context context, Handler target) { |
| 97 | mContext = context; |
| 98 | mCsHandler = target; |
| 99 | mBluetoothPan = new BluetoothPan(mContext); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Disable connectivity to a network |
| 104 | * TODO: do away with return value after making MobileDataStateTracker async |
| 105 | */ |
| 106 | public boolean teardown() { |
| 107 | mTeardownRequested.set(true); |
| 108 | for (BluetoothDevice device: mBluetoothPan.getConnectedDevices()) { |
| 109 | mBluetoothPan.disconnect(device); |
| 110 | } |
| 111 | return true; |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Re-enable connectivity to a network after a {@link #teardown()}. |
| 116 | */ |
| 117 | public boolean reconnect() { |
| 118 | mTeardownRequested.set(false); |
| 119 | //Ignore |
| 120 | return true; |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Turn the wireless radio off for a network. |
| 125 | * @param turnOn {@code true} to turn the radio on, {@code false} |
| 126 | */ |
| 127 | public boolean setRadio(boolean turnOn) { |
| 128 | return true; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * @return true - If are we currently tethered with another device. |
| 133 | */ |
| 134 | public synchronized boolean isAvailable() { |
| 135 | return mNetworkInfo.isAvailable(); |
| 136 | } |
| 137 | |
| 138 | /** |
| 139 | * Tells the underlying networking system that the caller wants to |
| 140 | * begin using the named feature. The interpretation of {@code feature} |
| 141 | * is completely up to each networking implementation. |
| 142 | * @param feature the name of the feature to be used |
| 143 | * @param callingPid the process ID of the process that is issuing this request |
| 144 | * @param callingUid the user ID of the process that is issuing this request |
| 145 | * @return an integer value representing the outcome of the request. |
| 146 | * The interpretation of this value is specific to each networking |
| 147 | * implementation+feature combination, except that the value {@code -1} |
| 148 | * always indicates failure. |
| 149 | * TODO: needs to go away |
| 150 | */ |
| 151 | public int startUsingNetworkFeature(String feature, int callingPid, int callingUid) { |
| 152 | return -1; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * Tells the underlying networking system that the caller is finished |
| 157 | * using the named feature. The interpretation of {@code feature} |
| 158 | * is completely up to each networking implementation. |
| 159 | * @param feature the name of the feature that is no longer needed. |
| 160 | * @param callingPid the process ID of the process that is issuing this request |
| 161 | * @param callingUid the user ID of the process that is issuing this request |
| 162 | * @return an integer value representing the outcome of the request. |
| 163 | * The interpretation of this value is specific to each networking |
| 164 | * implementation+feature combination, except that the value {@code -1} |
| 165 | * always indicates failure. |
| 166 | * TODO: needs to go away |
| 167 | */ |
| 168 | public int stopUsingNetworkFeature(String feature, int callingPid, int callingUid) { |
| 169 | return -1; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * @param enabled |
| 174 | */ |
| 175 | public void setDataEnable(boolean enabled) { |
| 176 | android.util.Log.d(TAG, "setDataEnabled: IGNORING enabled=" + enabled); |
| 177 | } |
| 178 | |
| 179 | /** |
| 180 | * Check if private DNS route is set for the network |
| 181 | */ |
| 182 | public boolean isPrivateDnsRouteSet() { |
| 183 | return mPrivateDnsRouteSet.get(); |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * Set a flag indicating private DNS route is set |
| 188 | */ |
| 189 | public void privateDnsRouteSet(boolean enabled) { |
| 190 | mPrivateDnsRouteSet.set(enabled); |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Fetch NetworkInfo for the network |
| 195 | */ |
| 196 | public synchronized NetworkInfo getNetworkInfo() { |
| 197 | return mNetworkInfo; |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Fetch LinkProperties for the network |
| 202 | */ |
| 203 | public synchronized LinkProperties getLinkProperties() { |
| 204 | return new LinkProperties(mLinkProperties); |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * A capability is an Integer/String pair, the capabilities |
| 209 | * are defined in the class LinkSocket#Key. |
| 210 | * |
| 211 | * @return a copy of this connections capabilities, may be empty but never null. |
| 212 | */ |
| 213 | public LinkCapabilities getLinkCapabilities() { |
| 214 | return new LinkCapabilities(mLinkCapabilities); |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * Fetch default gateway address for the network |
| 219 | */ |
| 220 | public int getDefaultGatewayAddr() { |
| 221 | return mDefaultGatewayAddr.get(); |
| 222 | } |
| 223 | |
| 224 | /** |
| 225 | * Check if default route is set |
| 226 | */ |
| 227 | public boolean isDefaultRouteSet() { |
| 228 | return mDefaultRouteSet.get(); |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * Set a flag indicating default route is set for the network |
| 233 | */ |
| 234 | public void defaultRouteSet(boolean enabled) { |
| 235 | mDefaultRouteSet.set(enabled); |
| 236 | } |
| 237 | |
| 238 | /** |
| 239 | * Return the system properties name associated with the tcp buffer sizes |
| 240 | * for this network. |
| 241 | */ |
| 242 | public String getTcpBufferSizesPropName() { |
| 243 | return "net.tcp.buffersize.wifi"; |
| 244 | } |
| 245 | |
| 246 | |
| 247 | public synchronized void startReverseTether(String iface, BluetoothDevice device) { |
| 248 | mIface = iface; |
| 249 | mDevice = device; |
| 250 | Thread dhcpThread = new Thread(new Runnable() { |
| 251 | public void run() { |
| 252 | //TODO(): Add callbacks for failure and success case. |
| 253 | //Currently this thread runs independently. |
| 254 | DhcpInfo dhcpInfo = new DhcpInfo(); |
| 255 | if (!NetworkUtils.runDhcp(mIface, dhcpInfo)) { |
| 256 | Log.e(TAG, "DHCP request error:" + NetworkUtils.getDhcpError()); |
| 257 | return; |
| 258 | } |
| 259 | mLinkProperties.addLinkAddress(new LinkAddress( |
| 260 | NetworkUtils.intToInetAddress(dhcpInfo.ipAddress), |
| 261 | NetworkUtils.intToInetAddress(dhcpInfo.netmask))); |
| 262 | mLinkProperties.setGateway(NetworkUtils.intToInetAddress(dhcpInfo.gateway)); |
| 263 | InetAddress dns1Addr = NetworkUtils.intToInetAddress(dhcpInfo.dns1); |
| 264 | if (dns1Addr == null || dns1Addr.equals("0.0.0.0")) { |
| 265 | mLinkProperties.addDns(dns1Addr); |
| 266 | } |
| 267 | InetAddress dns2Addr = NetworkUtils.intToInetAddress(dhcpInfo.dns2); |
| 268 | if (dns2Addr == null || dns2Addr.equals("0.0.0.0")) { |
| 269 | mLinkProperties.addDns(dns2Addr); |
| 270 | } |
| 271 | mLinkProperties.setInterfaceName(mIface); |
| 272 | |
| 273 | mNetworkInfo.setIsAvailable(true); |
| 274 | mNetworkInfo.setDetailedState(DetailedState.CONNECTED, null, null); |
| 275 | |
| 276 | Message msg = mCsHandler.obtainMessage(EVENT_CONFIGURATION_CHANGED, mNetworkInfo); |
| 277 | msg.sendToTarget(); |
| 278 | |
| 279 | msg = mCsHandler.obtainMessage(EVENT_STATE_CHANGED, mNetworkInfo); |
| 280 | msg.sendToTarget(); |
| 281 | } |
| 282 | }); |
| 283 | dhcpThread.start(); |
| 284 | } |
| 285 | |
| 286 | public synchronized void stopReverseTether(String iface) { |
| 287 | NetworkUtils.stopDhcp(iface); |
| 288 | |
| 289 | mLinkProperties.clear(); |
| 290 | mNetworkInfo.setIsAvailable(false); |
| 291 | mNetworkInfo.setDetailedState(DetailedState.DISCONNECTED, null, null); |
| 292 | |
| 293 | Message msg = mCsHandler.obtainMessage(EVENT_CONFIGURATION_CHANGED, mNetworkInfo); |
| 294 | msg.sendToTarget(); |
| 295 | |
| 296 | msg = mCsHandler.obtainMessage(EVENT_STATE_CHANGED, mNetworkInfo); |
| 297 | msg.sendToTarget(); |
| 298 | } |
| 299 | } |