public static void main(String[] args) {
if (args.length == 0) {
gui = true;
GUI.startGUI();
btServer = new BTServer();
try {
btServer.startServer();
} catch (IOException ioException) {
Log.e(TAG, "IOexception!", ioException);
}
} else {
try {
out = new OutputStreamWriter(new FileOutputStream(args[0]));
LocalDevice localDevice = LocalDevice.getLocalDevice();
writeMessage("Local System:\n");
writeMessage("Address: " + localDevice.getBluetoothAddress() + "\n");
writeMessage("Name: " + localDevice.getFriendlyName() + "\n");
btServer = new BTServer();
btServer.startServer();
} catch (IOException ioException) {
Log.e(TAG, "IOException!", ioException);
}
}
}
public void handleUpdatePacket(Packet p, String from) {
// dont update packets that came from this device
if (p.getSource().equals(localDevice.getBluetoothAddress())) return;
// get the md5 of the payload of the packet and store it
// if the previous md5 is the same with the new one
// then this packet is redundant
String hash = md5(p.getPayload());
if (history.containsKey(p.getSource())) {
String old = history.get(p.getSource());
if (old.equals(hash)) return;
}
ByteBuffer buffer = ByteBuffer.allocate(p.getPayload().length);
buffer.put(p.getPayload());
routingTable.remove(p.getSource());
routingTable.add(p.getSource());
byte[] tmp = new byte[12];
while (buffer.hasRemaining()) {
buffer.get(tmp, 0, 12);
routingTable.add(p.getSource(), new String(tmp));
}
for (String address : connections.keySet()) {
if (!address.equals(from)) {
connections.get(address).offer(p);
}
}
history.put(p.getSource(), hash);
}
public Set<String> getConnections() {
mutex.readLock().lock();
try {
return routingTable.devices(localDevice.getBluetoothAddress());
} finally {
mutex.readLock().unlock();
}
}
public void handleDataPacket(Packet p) {
// this packet is for this device
if (p.getDestination().equals(localDevice.getBluetoothAddress())) {
offer(p);
} else {
String nextHop = routingTable.nextHop(localDevice.getBluetoothAddress(), p.getDestination());
if (nextHop != null) {
Log("SynCore", "Packet from: " + p.getSource() + " routed to: " + nextHop);
for (String n : connections.keySet()) {
if (n.equals(nextHop)) {
connections.get(n).offer(p);
}
}
}
}
}
public boolean send(String destination, byte[] data) {
mutex.writeLock().lock();
try {
String nextHop = routingTable.nextHop(localDevice.getBluetoothAddress(), destination);
if (nextHop != null) {
Packet p =
new Packet(Packet.DATA_PACKET, localDevice.getBluetoothAddress(), destination, data);
ConnectionHandler handler = connections.get(nextHop);
if (handler != null) {
handler.offer(p);
return true;
}
}
} finally {
mutex.writeLock().unlock();
}
return false;
}
public boolean hasConnection(String address) {
mutex.readLock().lock();
try {
// check also visibility graph
return routingTable.search(localDevice.getBluetoothAddress(), address);
} finally {
mutex.readLock().unlock();
}
}
public void removeConnection(String address) {
mutex.writeLock().lock();
try {
if (connections.containsKey(address)) {
ConnectionHandler handler = connections.get(address);
connections.remove(address);
routingTable.remove(localDevice.getBluetoothAddress(), address);
handler.setStop(true);
}
} finally {
mutex.writeLock().unlock();
}
}
public BluetoothHandler() {
// display local device address and name
LocalDevice localDevice;
try {
localDevice = LocalDevice.getLocalDevice();
System.out.println("Address: " + localDevice.getBluetoothAddress());
System.out.println("Name: " + localDevice.getFriendlyName());
} catch (BluetoothStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public Packet requestUpdatePacket() {
mutex.readLock().lock();
try {
Set<String> n = connections.keySet();
ByteBuffer buf = ByteBuffer.allocate(n.size() * 12);
for (String i : n) {
buf.put(i.getBytes());
}
return new Packet(
Packet.UPDATE_PACKET, localDevice.getBluetoothAddress(), "UPDATEPACKET", buf.array());
} finally {
mutex.readLock().unlock();
}
}
private SyndicateCore() throws BluetoothStateException {
// initialize properties
initProperties();
Log("SynCore", "properties initialized");
SYNDICATE_UUID = new UUID("04A6C7B", false);
localDevice = LocalDevice.getLocalDevice();
Log("SynCore", "local device initialized");
mutex = new ReentrantReadWriteLock();
connections = new HashMap<String, ConnectionHandler>();
routingTable = new RoutingTable();
routingTable.add(localDevice.getBluetoothAddress());
lock = new ReentrantLock();
master = false;
in = new ConcurrentLinkedQueue<Packet>();
history = new ConcurrentHashMap<String, String>();
}
public void acceptConnection(BtConnection connection, boolean server) {
mutex.writeLock().lock();
try {
if (!hasConnection(connection.getRemoteDevice().getBluetoothAddress())
&& connections.size() < 2) {
ConnectionHandler handler = new ConnectionHandler(connection);
connections.put(handler.getBtAddress(), handler);
handler.start();
routingTable.add(localDevice.getBluetoothAddress(), handler.getBtAddress());
} else {
connection.close();
}
} catch (IOException e) {
Log("SynCore.acceptConnection", e.getMessage());
} finally {
mutex.writeLock().unlock();
}
}
public static void main(String[] args) throws Exception {
LocalDevice device = LocalDevice.getLocalDevice();
System.out.print(device.getFriendlyName() + " at ");
System.out.print(device.getBluetoothAddress());
System.exit(0);
}
@Override
public void run() {
try {
LocalDevice localDevice = LocalDevice.getLocalDevice();
logger.debug(
"Initializing local bluetooth device ({}, {})",
localDevice.getBluetoothAddress(),
localDevice.getFriendlyName());
DiscoveryAgent agent = localDevice.getDiscoveryAgent();
final Object inquiryCompletedEvent = new Object();
// this is the call back for the bluetooth driver
DiscoveryListener listener =
new DiscoveryListener() {
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
if (!newDevices.contains(btDevice)) {
newDevices.add(btDevice);
if (!oldDevices.contains(btDevice)) {
BluetoothDevice device = toBluetoothDevice(btDevice);
logger.debug("Device discovered: {}", device.toString());
for (BluetoothEventHandler handler : eventHandler) {
handler.handleDeviceInRange(device);
}
}
}
}
public void inquiryCompleted(int discType) {
// check if any device has disappeared
for (RemoteDevice btDevice : oldDevices) {
if (newDevices.contains(btDevice)) continue;
BluetoothDevice device = toBluetoothDevice(btDevice);
logger.debug("Device out of range: {}", device.toString());
for (BluetoothEventHandler handler : eventHandler) {
handler.handleDeviceOutOfRange(device);
}
}
oldDevices = new HashSet<RemoteDevice>(newDevices);
// we now pass the list of all devices in range to the event handlers
Iterable<BluetoothDevice> devices =
Iterables.transform(
newDevices,
new Function<RemoteDevice, BluetoothDevice>() {
public BluetoothDevice apply(RemoteDevice from) {
return toBluetoothDevice(from);
}
});
for (BluetoothEventHandler handler : eventHandler) {
handler.handleAllDevicesInRange(devices);
}
newDevices.clear();
synchronized (inquiryCompletedEvent) {
// tell the main thread that we are done
inquiryCompletedEvent.notifyAll();
}
}
public void serviceSearchCompleted(int transID, int respCode) {}
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {}
};
// this is the main loop, which will run as long as the thread is not marked as interrupted
while (!interrupted) {
long starttime = new Date().getTime();
// check if we at all need to run the bluetooth discovery
boolean runDiscovery = false;
for (BluetoothEventHandler handler : eventHandler) {
if (handler.isActive()) {
runDiscovery = true;
break;
}
}
if (runDiscovery) {
synchronized (inquiryCompletedEvent) {
try {
logger.debug("Launching bluetooth device discovery...");
boolean started = agent.startInquiry(DiscoveryAgent.GIAC, listener);
if (started) {
inquiryCompletedEvent.wait();
}
} catch (BluetoothStateException e) {
logger.error("Error while starting the bluetooth agent", e);
} catch (InterruptedException e) {
interrupted = true;
}
}
}
if (!interrupted) {
// let this thread sleep until the next discovery should be done
long sleeptime = refreshRate * 1000L - (new Date().getTime() - starttime);
if (sleeptime > 0) {
logger.debug("Sleeping for {} s...", sleeptime / 1000.0);
try {
Thread.sleep(sleeptime);
} catch (InterruptedException e) {
interrupted = true;
}
}
}
}
} catch (BluetoothStateException e) {
logger.error("Error while initializing local bluetooth device.", e);
}
}
