| /* |
| * Copyright (C) 2012 Google Inc. |
| */ |
| |
| package com.android.bluetooth.pan; |
| |
| import android.app.Service; |
| import android.bluetooth.BluetoothAdapter; |
| import android.bluetooth.BluetoothDevice; |
| import android.bluetooth.BluetoothPan; |
| import android.bluetooth.BluetoothProfile; |
| import android.bluetooth.BluetoothTetheringDataTracker; |
| import android.bluetooth.IBluetooth; |
| import android.bluetooth.IBluetoothPan; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.pm.PackageManager; |
| import android.content.res.Resources.NotFoundException; |
| import android.net.ConnectivityManager; |
| import android.net.InterfaceConfiguration; |
| import android.net.LinkAddress; |
| import android.net.NetworkUtils; |
| import android.os.IBinder; |
| import android.os.INetworkManagementService; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.provider.Settings; |
| import android.util.Log; |
| |
| import java.net.InetAddress; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import com.android.bluetooth.Utils; |
| import com.android.bluetooth.btservice.AdapterService; |
| import com.android.bluetooth.btservice.ProfileService; |
| |
| /** |
| * Provides Bluetooth Pan Device profile, as a service in |
| * the Bluetooth application. |
| * @hide |
| */ |
| public class PanService extends ProfileService { |
| private static final String TAG = "PanService"; |
| private static final boolean DBG = true; |
| |
| private static final String BLUETOOTH_IFACE_ADDR_START= "192.168.44.1"; |
| private static final int BLUETOOTH_MAX_PAN_CONNECTIONS = 5; |
| private static final int BLUETOOTH_PREFIX_LENGTH = 24; |
| |
| private HashMap<BluetoothDevice, BluetoothPanDevice> mPanDevices; |
| private ArrayList<String> mBluetoothIfaceAddresses; |
| private int mMaxPanDevices; |
| private String mPanIfName; |
| |
| private static final int MESSAGE_CONNECT = 1; |
| private static final int MESSAGE_DISCONNECT = 2; |
| private static final int MESSAGE_CONNECT_STATE_CHANGED = 11; |
| private boolean mTetherOn = false; |
| |
| |
| static { |
| classInitNative(); |
| } |
| |
| protected String getName() { |
| return TAG; |
| } |
| |
| @Override |
| public IBinder onBind(Intent intent) { |
| log("onBind"); |
| return mBinder; |
| } |
| |
| protected boolean start() { |
| |
| //Cleanup referenced objects here |
| |
| if(mPanDevices != null) { |
| mPanDevices.clear(); |
| mPanDevices = null; |
| } |
| if(mBluetoothIfaceAddresses != null) { |
| mBluetoothIfaceAddresses.clear(); |
| mBluetoothIfaceAddresses = null; |
| } |
| if(mPanIfName != null) |
| mPanIfName = null; |
| if(mHandler != null) |
| mHandler.removeCallbacksAndMessages(null); |
| |
| if (DBG) log("start"); |
| mPanDevices = new HashMap<BluetoothDevice, BluetoothPanDevice>(); |
| mBluetoothIfaceAddresses = new ArrayList<String>(); |
| try { |
| mMaxPanDevices = getResources().getInteger( |
| com.android.internal.R.integer.config_max_pan_devices); |
| } catch (NotFoundException e) { |
| mMaxPanDevices = BLUETOOTH_MAX_PAN_CONNECTIONS; |
| } |
| |
| initializeNative(); |
| return true; |
| } |
| |
| protected boolean stop() { |
| if (DBG) log("stop"); |
| |
| //Cleanup native |
| cleanupNative(); |
| |
| if(mPanDevices != null) { |
| mPanDevices.clear(); |
| mPanDevices = null; |
| } |
| if(mBluetoothIfaceAddresses != null) { |
| mBluetoothIfaceAddresses.clear(); |
| mBluetoothIfaceAddresses = null; |
| } |
| if(mPanIfName != null) |
| mPanIfName = null; |
| if(mHandler != null) |
| mHandler.removeCallbacksAndMessages(null); |
| return true; |
| } |
| |
| private final Handler mHandler = new Handler() { |
| |
| @Override |
| public void handleMessage(Message msg) { |
| switch (msg.what) { |
| case MESSAGE_CONNECT: |
| { |
| BluetoothDevice device = (BluetoothDevice) msg.obj; |
| if (!connectPanNative(getByteAddress(device), BluetoothPan.LOCAL_PANU_ROLE, BluetoothPan.REMOTE_NAP_ROLE)) { |
| handlePanDeviceStateChange(device, null, BluetoothProfile.STATE_CONNECTING, |
| BluetoothPan.LOCAL_PANU_ROLE, BluetoothPan.REMOTE_NAP_ROLE); |
| handlePanDeviceStateChange(device, null, BluetoothProfile.STATE_DISCONNECTED, |
| BluetoothPan.LOCAL_PANU_ROLE, BluetoothPan.REMOTE_NAP_ROLE); |
| break; |
| } |
| } |
| break; |
| case MESSAGE_DISCONNECT: |
| { |
| BluetoothDevice device = (BluetoothDevice) msg.obj; |
| if (!disconnectPanNative(getByteAddress(device)) ) { |
| handlePanDeviceStateChange(device, mPanIfName, BluetoothProfile.STATE_DISCONNECTING, |
| BluetoothPan.LOCAL_PANU_ROLE, BluetoothPan.REMOTE_NAP_ROLE); |
| handlePanDeviceStateChange(device, mPanIfName, BluetoothProfile.STATE_DISCONNECTED, |
| BluetoothPan.LOCAL_PANU_ROLE, BluetoothPan.REMOTE_NAP_ROLE); |
| break; |
| } |
| } |
| break; |
| case MESSAGE_CONNECT_STATE_CHANGED: |
| { |
| ConnectState cs = (ConnectState)msg.obj; |
| BluetoothDevice device = getDevice(cs.addr); |
| // TBD get iface from the msg |
| if (DBG) log("MESSAGE_CONNECT_STATE_CHANGED: " + device + " state: " + cs.state); |
| handlePanDeviceStateChange(device, mPanIfName /* iface */, convertHalState(cs.state), |
| cs.local_role, cs.remote_role); |
| } |
| break; |
| } |
| } |
| }; |
| |
| /** |
| * Handlers for incoming service calls |
| */ |
| private final IBluetoothPan.Stub mBinder = new IBluetoothPan.Stub() { |
| public boolean connect(BluetoothDevice device) { |
| enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission"); |
| if (getConnectionState(device) != BluetoothProfile.STATE_DISCONNECTED) { |
| Log.e(TAG, "Pan Device not disconnected: " + device); |
| return false; |
| } |
| Message msg = mHandler.obtainMessage(MESSAGE_CONNECT); |
| msg.obj = device; |
| mHandler.sendMessage(msg); |
| return true; |
| } |
| |
| public boolean disconnect(BluetoothDevice device) { |
| enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission"); |
| Message msg = mHandler.obtainMessage(MESSAGE_DISCONNECT); |
| msg.obj = device; |
| mHandler.sendMessage(msg); |
| return true; |
| } |
| |
| public int getConnectionState(BluetoothDevice device) { |
| BluetoothPanDevice panDevice = mPanDevices.get(device); |
| if (panDevice == null) { |
| return BluetoothPan.STATE_DISCONNECTED; |
| } |
| return panDevice.mState; |
| } |
| private boolean isPanNapOn() { |
| if(DBG) Log.d(TAG, "isTetheringOn call getPanLocalRoleNative"); |
| return (getPanLocalRoleNative() & BluetoothPan.LOCAL_NAP_ROLE) != 0; |
| } |
| private boolean isPanUOn() { |
| if(DBG) Log.d(TAG, "isTetheringOn call getPanLocalRoleNative"); |
| return (getPanLocalRoleNative() & BluetoothPan.LOCAL_PANU_ROLE) != 0; |
| } |
| public boolean isTetheringOn() { |
| // TODO(BT) have a variable marking the on/off state |
| return mTetherOn; |
| } |
| |
| public void setBluetoothTethering(boolean value) { |
| if(DBG) Log.d(TAG, "setBluetoothTethering: " + value +", mTetherOn: " + mTetherOn); |
| enforceCallingOrSelfPermission(BLUETOOTH_ADMIN_PERM, "Need BLUETOOTH_ADMIN permission"); |
| if(mTetherOn != value) { |
| //drop any existing panu or pan-nap connection when changing the tethering state |
| mTetherOn = value; |
| List<BluetoothDevice> DevList = getConnectedDevices(); |
| for(BluetoothDevice dev : DevList) |
| disconnect(dev); |
| } |
| } |
| |
| public List<BluetoothDevice> getConnectedDevices() { |
| enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission"); |
| List<BluetoothDevice> devices = getDevicesMatchingConnectionStates( |
| new int[] {BluetoothProfile.STATE_CONNECTED}); |
| return devices; |
| } |
| |
| public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) { |
| enforceCallingOrSelfPermission(BLUETOOTH_PERM, "Need BLUETOOTH permission"); |
| List<BluetoothDevice> panDevices = new ArrayList<BluetoothDevice>(); |
| |
| for (BluetoothDevice device: mPanDevices.keySet()) { |
| int panDeviceState = getConnectionState(device); |
| for (int state : states) { |
| if (state == panDeviceState) { |
| panDevices.add(device); |
| break; |
| } |
| } |
| } |
| return panDevices; |
| } |
| }; |
| static protected class ConnectState { |
| public ConnectState(byte[] address, int state, int error, int local_role, int remote_role) { |
| this.addr = address; |
| this.state = state; |
| this.error = error; |
| this.local_role = local_role; |
| this.remote_role = remote_role; |
| } |
| byte[] addr; |
| int state; |
| int error; |
| int local_role; |
| int remote_role; |
| }; |
| private void onConnectStateChanged(byte[] address, int state, int error, int local_role, int remote_role) { |
| if (DBG) log("onConnectStateChanged: " + state + ", local role:" + local_role + ", remote_role: " + remote_role); |
| Message msg = mHandler.obtainMessage(MESSAGE_CONNECT_STATE_CHANGED); |
| msg.obj = new ConnectState(address, state, error, local_role, remote_role); |
| mHandler.sendMessage(msg); |
| } |
| private void onControlStateChanged(int local_role, int state, int error, String ifname) { |
| if (DBG) |
| log("onControlStateChanged: " + state + ", error: " + error + ", ifname: " + ifname); |
| if(error == 0) |
| mPanIfName = ifname; |
| } |
| private BluetoothDevice getDevice(byte[] address) { |
| return mAdapter.getRemoteDevice(Utils.getAddressStringFromByte(address)); |
| } |
| |
| private byte[] getByteAddress(BluetoothDevice device) { |
| return Utils.getBytesFromAddress(device.getAddress()); |
| } |
| |
| private int convertHalState(int halState) { |
| switch (halState) { |
| case CONN_STATE_CONNECTED: |
| return BluetoothProfile.STATE_CONNECTED; |
| case CONN_STATE_CONNECTING: |
| return BluetoothProfile.STATE_CONNECTING; |
| case CONN_STATE_DISCONNECTED: |
| return BluetoothProfile.STATE_DISCONNECTED; |
| case CONN_STATE_DISCONNECTING: |
| return BluetoothProfile.STATE_DISCONNECTING; |
| default: |
| Log.e(TAG, "bad pan connection state: " + halState); |
| return BluetoothProfile.STATE_DISCONNECTED; |
| } |
| } |
| |
| void handlePanDeviceStateChange(BluetoothDevice device, |
| String iface, int state, int local_role, int remote_role) { |
| if(DBG) Log.d(TAG, "handlePanDeviceStateChange: device: " + device + ", iface: " + iface + |
| ", state: " + state + ", local_role:" + local_role + ", remote_role:" + remote_role); |
| int prevState; |
| String ifaceAddr = null; |
| BluetoothPanDevice panDevice = mPanDevices.get(device); |
| if (panDevice == null) { |
| prevState = BluetoothProfile.STATE_DISCONNECTED; |
| } else { |
| prevState = panDevice.mState; |
| ifaceAddr = panDevice.mIfaceAddr; |
| } |
| Log.d(TAG, "handlePanDeviceStateChange preState: " + prevState + " state: " + state); |
| if (prevState == state) return; |
| if (remote_role == BluetoothPan.LOCAL_PANU_ROLE) { |
| Log.d(TAG, "handlePanDeviceStateChange LOCAL_NAP_ROLE:REMOTE_PANU_ROLE"); |
| if (state == BluetoothProfile.STATE_CONNECTED) { |
| if(!mTetherOn) { |
| Log.d(TAG, "handlePanDeviceStateChange bluetooth tethering is off, drop the connection"); |
| disconnectPanNative(getByteAddress(device)); |
| return; |
| } |
| ifaceAddr = enableTethering(iface); |
| if (ifaceAddr == null) Log.e(TAG, "Error seting up tether interface"); |
| |
| } else if (state == BluetoothProfile.STATE_DISCONNECTED) { |
| if (ifaceAddr != null) { |
| mBluetoothIfaceAddresses.remove(ifaceAddr); |
| ifaceAddr = null; |
| } |
| } |
| } else { |
| // PANU Role = reverse Tether |
| Log.d(TAG, "handlePanDeviceStateChange LOCAL_PANU_ROLE:REMOTE_NAP_ROLE"); |
| if (state == BluetoothProfile.STATE_CONNECTED) { |
| if(DBG) Log.d(TAG, "handlePanDeviceStateChange: panu STATE_CONNECTED, startReverseTether"); |
| IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE); |
| INetworkManagementService service = INetworkManagementService.Stub.asInterface(b); |
| Log.d(TAG, "call INetworkManagementService.startReverseTethering()"); |
| try { |
| service.startReverseTethering(iface); |
| } catch (Exception e) { |
| Log.e(TAG, "Cannot start reverse tethering: " + e); |
| return; |
| } |
| } else if (state == BluetoothProfile.STATE_DISCONNECTED && |
| (prevState == BluetoothProfile.STATE_CONNECTED || |
| prevState == BluetoothProfile.STATE_DISCONNECTING)) { |
| if(DBG) Log.d(TAG, "handlePanDeviceStateChange: stopReverseTether, panDevice.mIface: " |
| + panDevice.mIface); |
| IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE); |
| INetworkManagementService service = INetworkManagementService.Stub.asInterface(b); |
| try { |
| service.stopReverseTethering(); |
| } catch(Exception e) { |
| Log.e(TAG, "Cannot stop reverse tethering: " + e); |
| return; |
| } |
| } |
| } |
| |
| if (panDevice == null) { |
| panDevice = new BluetoothPanDevice(state, ifaceAddr, iface, local_role); |
| mPanDevices.put(device, panDevice); |
| } else { |
| panDevice.mState = state; |
| panDevice.mIfaceAddr = ifaceAddr; |
| panDevice.mLocalRole = local_role; |
| panDevice.mIface = iface; |
| } |
| |
| Intent intent = new Intent(BluetoothPan.ACTION_CONNECTION_STATE_CHANGED); |
| intent.putExtra(BluetoothDevice.EXTRA_DEVICE, device); |
| intent.putExtra(BluetoothPan.EXTRA_PREVIOUS_STATE, prevState); |
| intent.putExtra(BluetoothPan.EXTRA_STATE, state); |
| intent.putExtra(BluetoothPan.EXTRA_LOCAL_ROLE, local_role); |
| sendBroadcast(intent, BLUETOOTH_PERM); |
| |
| if (DBG) Log.d(TAG, "Pan Device state : device: " + device + " State:" + |
| prevState + "->" + state); |
| AdapterService svc = AdapterService.getAdapterService(); |
| if (svc != null) { |
| svc.onProfileConnectionStateChanged(device, BluetoothProfile.PAN, state, prevState); |
| } |
| } |
| |
| // configured when we start tethering |
| private String enableTethering(String iface) { |
| if (DBG) Log.d(TAG, "updateTetherState:" + iface); |
| |
| IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE); |
| INetworkManagementService service = INetworkManagementService.Stub.asInterface(b); |
| ConnectivityManager cm = |
| (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); |
| String[] bluetoothRegexs = cm.getTetherableBluetoothRegexs(); |
| |
| // bring toggle the interfaces |
| String[] currentIfaces = new String[0]; |
| try { |
| currentIfaces = service.listInterfaces(); |
| } catch (Exception e) { |
| Log.e(TAG, "Error listing Interfaces :" + e); |
| return null; |
| } |
| |
| boolean found = false; |
| for (String currIface: currentIfaces) { |
| if (currIface.equals(iface)) { |
| found = true; |
| break; |
| } |
| } |
| |
| if (!found) return null; |
| |
| String address = createNewTetheringAddressLocked(); |
| if (address == null) return null; |
| |
| InterfaceConfiguration ifcg = null; |
| try { |
| ifcg = service.getInterfaceConfig(iface); |
| if (ifcg != null) { |
| InetAddress addr = null; |
| if (ifcg.addr == null || (addr = ifcg.addr.getAddress()) == null || |
| addr.equals(NetworkUtils.numericToInetAddress("0.0.0.0")) || |
| addr.equals(NetworkUtils.numericToInetAddress("::0"))) { |
| addr = NetworkUtils.numericToInetAddress(address); |
| } |
| ifcg.interfaceFlags = ifcg.interfaceFlags.replace("down", "up"); |
| ifcg.addr = new LinkAddress(addr, BLUETOOTH_PREFIX_LENGTH); |
| ifcg.interfaceFlags = ifcg.interfaceFlags.replace("running", ""); |
| ifcg.interfaceFlags = ifcg.interfaceFlags.replace(" "," "); |
| service.setInterfaceConfig(iface, ifcg); |
| if (cm.tether(iface) != ConnectivityManager.TETHER_ERROR_NO_ERROR) { |
| Log.e(TAG, "Error tethering "+iface); |
| } |
| } |
| } catch (Exception e) { |
| Log.e(TAG, "Error configuring interface " + iface + ", :" + e); |
| return null; |
| } |
| return address; |
| } |
| |
| private String createNewTetheringAddressLocked() { |
| if (getConnectedPanDevices().size() == mMaxPanDevices) { |
| if (DBG) Log.d(TAG, "Max PAN device connections reached"); |
| return null; |
| } |
| String address = BLUETOOTH_IFACE_ADDR_START; |
| while (true) { |
| if (mBluetoothIfaceAddresses.contains(address)) { |
| String[] addr = address.split("\\."); |
| Integer newIp = Integer.parseInt(addr[2]) + 1; |
| address = address.replace(addr[2], newIp.toString()); |
| } else { |
| break; |
| } |
| } |
| mBluetoothIfaceAddresses.add(address); |
| return address; |
| } |
| |
| private List<BluetoothDevice> getConnectedPanDevices() { |
| List<BluetoothDevice> devices = new ArrayList<BluetoothDevice>(); |
| |
| for (BluetoothDevice device: mPanDevices.keySet()) { |
| if (getPanDeviceConnectionState(device) == BluetoothProfile.STATE_CONNECTED) { |
| devices.add(device); |
| } |
| } |
| return devices; |
| } |
| |
| private int getPanDeviceConnectionState(BluetoothDevice device) { |
| BluetoothPanDevice panDevice = mPanDevices.get(device); |
| if (panDevice == null) { |
| return BluetoothProfile.STATE_DISCONNECTED; |
| } |
| return panDevice.mState; |
| } |
| |
| private class BluetoothPanDevice { |
| private int mState; |
| private String mIfaceAddr; |
| private String mIface; |
| private int mLocalRole; // Which local role is this PAN device bound to |
| |
| BluetoothPanDevice(int state, String ifaceAddr, String iface, int localRole) { |
| mState = state; |
| mIfaceAddr = ifaceAddr; |
| mIface = iface; |
| mLocalRole = localRole; |
| } |
| } |
| |
| // Constants matching Hal header file bt_hh.h |
| // bthh_connection_state_t |
| private final static int CONN_STATE_CONNECTED = 0; |
| private final static int CONN_STATE_CONNECTING = 1; |
| private final static int CONN_STATE_DISCONNECTED = 2; |
| private final static int CONN_STATE_DISCONNECTING = 3; |
| |
| private native static void classInitNative(); |
| private native void initializeNative(); |
| private native void cleanupNative(); |
| private native boolean connectPanNative(byte[] btAddress, int local_role, int remote_role); |
| private native boolean disconnectPanNative(byte[] btAddress); |
| private native boolean enablePanNative(int local_role); |
| private native int getPanLocalRoleNative(); |
| } |
