public sendUDPBroadcastThread() {
try {
// Creates the socket
if (socket == null) {
socket = new DatagramSocket(null);
socket.setReuseAddress(true);
socket.setBroadcast(true);
socket.bind(new InetSocketAddress(8080));
socket.setBroadcast(true);
}
} catch (SocketException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
int port = 5555;
DatagramSocket socket;
socket = null;
try {
socket = new DatagramSocket(port);
socket.setBroadcast(true);
socket.connect(InetAddress.getByName("255.255.255.255"), 5555);
} catch (Exception e) {
System.err.println("Connection failed. " + e.getMessage());
}
while (true) {
String message = "hey";
byte[] buf = message.getBytes();
DatagramPacket packet = new DatagramPacket(buf, buf.length);
try {
socket.send(packet);
} catch (Exception e) {
System.err.println("Sending failed. " + e.getMessage());
}
}
}
public void init() {
try {
localAddress = InetAddress.getLocalHost();
if (localAddress.isLoopbackAddress()) {
System.out.println("get local ip error!");
return;
}
NetworkInterface networkInterface = NetworkInterface.getByInetAddress(localAddress);
List<InterfaceAddress> addresses = networkInterface.getInterfaceAddresses();
for (InterfaceAddress address : addresses) {
if (address.getAddress() instanceof Inet6Address) {
continue;
}
if (address.getBroadcast() != null) {
broadcastAddress = address.getBroadcast();
break;
} else {
System.out.println("get broadcast address error!");
}
}
System.out.println("local ip address is " + localAddress.getHostAddress());
System.out.println("broadcast address is " + broadcastAddress.getHostAddress());
socket = new DatagramSocket(2000);
socket.setBroadcast(true);
} catch (UnknownHostException ue) {
ue.printStackTrace();
} catch (SocketException se) {
se.printStackTrace();
}
}
// on linux system
public void init2() {
try {
NetworkInterface networkInterface = NetworkInterface.getByName("eth0");
Enumeration<InetAddress> inetAddresses = networkInterface.getInetAddresses();
while (inetAddresses.hasMoreElements()) {
InetAddress address = inetAddresses.nextElement();
if (!address.isLinkLocalAddress()) { // just get IPv4 address
localAddress = address;
}
}
// get broadcast address
List<InterfaceAddress> addresses = networkInterface.getInterfaceAddresses();
for (InterfaceAddress address : addresses) {
if (address.getBroadcast() != null) {
broadcastAddress = address.getBroadcast();
break;
}
}
if (broadcastAddress == null) {
System.out.println("get broadcast address error!");
}
System.out.println("local ip address is " + localAddress.getHostAddress());
System.out.println("broadcast address is " + broadcastAddress.getHostAddress());
socket = new DatagramSocket();
socket.setBroadcast(true);
} catch (SocketException se) {
se.printStackTrace();
}
}
private static void setupService() {
try {
// setup webserver to listen on localhost:80
Webserver server = new Webserver(80);
// open broadcast socket on port 15000
DatagramSocket broadcast_socket = new DatagramSocket();
broadcast_socket.setBroadcast(true);
// {optional} mac address hash
String macHash = "12345678909876543212345678909876";
// get IP address from this machine
// Create broadcast message
String broadcast_msg = "Sensor online, MACHash=" + macHash + ", IP=" + getIP();
// Create broadcast packet
DatagramPacket broadcast_packet =
new DatagramPacket(
broadcast_msg.getBytes(),
broadcast_msg.getBytes().length,
InetAddress.getByName("255.255.255.255"),
15000);
// Send Broadcast packet
broadcast_socket.send(broadcast_packet);
} catch (IOException ex) {
Logger.getLogger(UserTrackerApplication.class.getName()).log(Level.SEVERE, null, ex);
}
}
@Override
public void run() {
DatagramSocket socket;
int clientListnport = Constants.UDPPort;
try {
// Keep a socket open to listen to all the UDP trafic that is
// destined for this port
socket = new DatagramSocket(clientListnport, (Inet4Address) InetAddress.getByName("0.0.0.0"));
socket.setBroadcast(true);
socket.setSoTimeout(10000);
while (WifiReceiver.isWifi) {
System.out.println(">>>Ready to receive broadcast packets!");
// Receive a packet
byte[] recvBuf = new byte[15000];
DatagramPacket packet = new DatagramPacket(recvBuf, recvBuf.length);
try {
socket.receive(packet);
// Packet received
System.out.println(
">>>Discovery packet received from: " + packet.getAddress().getHostAddress());
// See if the packet holds the right command (message)
String message = new String(packet.getData()).trim();
if (message.equals(Constants.serverDiscoverString)) {
byte[] sendData = Constants.clientReplyString.getBytes();
// Send a response
if (!WifiUtils.getipAddress()
.equalsIgnoreCase(packet.getAddress().getHostAddress().toString())) {
DatagramPacket sendPacket =
new DatagramPacket(
sendData, sendData.length, packet.getAddress(), packet.getPort());
socket.send(sendPacket);
System.out.println(">>>Sent packet to: " + sendPacket.getAddress().getHostAddress());
}
} else if (message.equals(Constants.serverFileSending)) {
System.out.println("sending reply to recive handshake");
byte[] sendData = Constants.clientFileReceive.getBytes();
DatagramPacket sendPacket =
new DatagramPacket(
sendData, sendData.length, packet.getAddress(), packet.getPort());
socket.send(sendPacket);
Log.d(loggerTag, "handshaking is done");
FileReceiver.waitConnection();
}
} catch (SocketTimeoutException e) {
// no need of doing anything
}
}
System.out.println("CLientListener : Listener is stoped");
} catch (IOException ex) {
System.err.println(ex);
}
}
public synchronized void init() {
try {
socket = new DatagramSocket();
socket.setBroadcast(true);
addr = InetAddress.getByName(castIP);
} catch (Exception e) {
e.printStackTrace();
}
}
// Discovery thread
@Override
public void run() {
while (!Thread.currentThread().isInterrupted()) {
try {
socket = new DatagramSocket(DISCOVERY_PORT, InetAddress.getByName("0.0.0.0"));
socket.setBroadcast(true);
// Keep an UDP Socket open
while (!Thread.currentThread().isInterrupted() && socket.isBound()) {
// Ready to receive sockets
// Receive a packet
byte[] rcvBuff = new byte[15000];
DatagramPacket packet = new DatagramPacket(rcvBuff, rcvBuff.length);
socket.receive(packet);
// Packet received
String msg = new String(packet.getData()).trim();
if (msg.equals("REMOTECRAFT_DISCOVERY_REQUEST")) {
// Attach world name
String msgResponse =
"REMOTECRAFT_DISCOVERY_RESPONSE:"
+ String.valueOf(this.worldSeed)
+ "_"
+ this.worldName;
byte[] sendData = msgResponse.getBytes();
// Send response
DatagramPacket sendPacket =
new DatagramPacket(
sendData, sendData.length, packet.getAddress(), packet.getPort());
if (socket.isBound()) {
try {
socket.send(sendPacket);
} catch (Exception e) {
e.printStackTrace();
}
} else {
continue;
}
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
socket.disconnect();
socket.close();
} catch (NullPointerException e) {
e.printStackTrace();
}
}
} // while !threadIsInterrupted
}
private void sendData(DatagramPacket packet, int localSendingPort) throws Exception {
DatagramSocket sock = null;
sock = new DatagramSocket(localSendingPort);
sock.setReuseAddress(true);
sock.setBroadcast(true);
sock.send(packet);
sock.close();
}
public Candidate discoverFromBroadcast()
throws IOException, RetryException, ParserConfigurationException {
DatagramSocket socket = new DatagramSocket();
socket.setBroadcast(true);
sendBroadcast(socket);
List<DatagramPacket> responses = collectBroadcastResponses(socket);
return getCandidateFromDatagramResponses(responses);
}
@Override
protected void open() throws IOException {
Log.d(TAG, "Opening udp connection.");
socket = (serverPort == -1) ? new DatagramSocket() : new DatagramSocket(serverPort);
socket.setBroadcast(true);
socket.setReuseAddress(true);
socket.setSoTimeout(readTimeout);
}
// @Override
// protected void onPreExecute() {
// Log.i("AsyncTask", "onPreExecute");
// }
@Override
protected Boolean doInBackground(Void... params) {
Log.i("AsyncTask", "doInBackground: Creating socket");
while (networkConnection == true) {
try {
DatagramSocket client_socket = new DatagramSocket(null);
client_socket.setReuseAddress(true);
client_socket.setBroadcast(true);
client_socket.bind(new InetSocketAddress(PORT));
byte[] receiveData = new byte[1024];
DatagramPacket packet = new DatagramPacket(receiveData, receiveData.length);
client_socket.receive(packet);
modifiedSentence = new String(packet.getData(), 0, packet.getLength());
Log.i("dostaje dane postaci", modifiedSentence);
/*String pierwszy = Character.toString(modifiedSentence.charAt(0));
Log.i("pierwszy znak to", pierwszy);*/
t.start();
u.start();
client_socket.close();
} catch (Throwable e) {
e.printStackTrace();
}
// setUpMap();
/*if (modifiedSentence.startsWith("$")) {
Log.i("parsuje", "nmee");
nmeaParser=new NmeaParser(modifiedSentence);
lat=nmeaParser.latitude;
lon=nmeaParser.longitude;
setUpMap();
} else {
sensor.setTxtaccel_x();
sensor.setTxtaccel_y();
sensor.setTxtaccel_z();
sensor.setTxtmac_id();
sensor.setTxtid();
Log.d("set text", "dziala");
}*/
}
return true;
}
public static void sendTo(String ip, int port, byte[] sendBuf) {
try {
if (_client == null) {
_client = new DatagramSocket(null);
_client.setReuseAddress(true);
_client.setBroadcast(true); // 设置标志，T OR E OR R广播数据报
// 在2.2左右版本不行。在4.0版本上可行
_client.bind(new InetSocketAddress(port));
}
InetAddress address = InetAddress.getByName(ip);
DatagramPacket sendpacket = new DatagramPacket(sendBuf, SEND_LENGHT, address, port);
_client.setSoTimeout(2000);
_client.send(sendpacket);
} catch (Exception e) {
e.printStackTrace();
}
}
// ------------------------------------------------------------
@Override
public void run() {
DatagramSocket ds;
int numServers = Integer.valueOf(rb.getString("NumServers"));
ServerDescription[] validServers = new ServerDescription[numServers];
int expectedServers = 0;
boolean addToFile = false, serverAdded;
System.out.println("Started listening for subagent broadcasts");
for (int i = 0; i < numServers; i++) validServers[i] = new ServerDescription();
try {
expectedServers = getExpectedServers(validServers);
} catch (GenericException e) {
System.out.println("Parse error in file, rejecting subagent");
}
int listenPort = Integer.valueOf(rb.getString("broadcastPort"));
System.out.println("listen Port is " + listenPort);
try {
ds = new DatagramSocket(null);
ds.setBroadcast(true);
ds.setReuseAddress(true);
ds.bind(new InetSocketAddress(listenPort));
} catch (IOException e) {
System.out.println("Error, broadcast socket not created successfully");
System.out.println("Got message: " + e);
return;
}
byte[] receiveData = new byte[1024];
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
while (keepRunning) {
try {
ds.receive(receivePacket);
System.out.println("Received a datagram packet");
if (expectedServers < numServers) addToFile = true;
else addToFile = false;
serverAdded = respondToDatagram(receivePacket, validServers, addToFile, expectedServers);
if (serverAdded) expectedServers++;
} catch (IOException e) {
System.out.println("Error, unable to connect with subagent");
System.out.println("Got message: " + e);
}
} // end while (keepRunning)
}
// Broadcasts a packet containing server address to the LAN every second
public void run() {
try {
DatagramSocket socket = new DatagramSocket();
InetSocketAddress address = new InetSocketAddress("255.255.255.255", DISCOVERY_PORT);
byte[] message = new byte[0];
socket.setBroadcast(true);
DatagramPacket packet = new DatagramPacket(message, message.length);
packet.setSocketAddress(address);
while (true) {
socket.send(packet);
Thread.sleep(1000);
}
} catch (IOException e) {
// Port is in use, we don't know our own address or we could not send the broadcast for some
// reason. Either way, discovery won't work.
logger.log(Level.SEVERE, null, e);
} catch (InterruptedException e) {
logger.log(Level.INFO, "Discovery service shutting down");
}
}
private void readPackets() {
try {
if (socket == null) {
// InetAddress addr =
// InetAddress.getByName(configuration.IP_HERMES);
InetSocketAddress socketaddress = new InetSocketAddress(configuration.PORT_HERMES);
socket = new DatagramSocket(socketaddress);
socket.setReuseAddress(true);
socket.setBroadcast(true);
socket.setSoTimeout(100);
}
DatagramPacket datagram = new DatagramPacket(rxbuffer, rxbuffer.length);
socket.receive(datagram);
handlePacket(datagram);
} catch (SocketException se) {
} catch (IOException ioe) {
}
}
public void start() throws Exception {
for (int i = bind_port; i <= bind_port + port_range; i++) {
try {
sock = getSocketFactory().createDatagramSocket("jgroups.bping.sock", i);
break;
} catch (Throwable t) {
if (i > bind_port + port_range)
throw new RuntimeException(
"failed to open a port in range ["
+ bind_port
+ " - "
+ (bind_port + port_range)
+ "]",
t);
}
}
sock.setBroadcast(true);
startReceiver();
super.start();
}
/**
* 获取设备信息
*
* @param msg
* @param listener
*/
public static void receive(String msg, UdpCallBackListener listener) {
ArrayList<String> responses = new ArrayList<String>();
String Strs = "";
try {
if (_client == null) {
_client = new DatagramSocket(null);
_client.setReuseAddress(true);
_client.setBroadcast(true); // 设置标志，T OR E OR R广播数据报
// 在2.2左右版本不行。在4.0版本上可行
_client.bind(new InetSocketAddress(port));
}
DatagramPacket sendDp =
new DatagramPacket(
msg.getBytes(), msg.getBytes().length, InetAddress.getByName(IP), port);
_client.setSoTimeout(2000);
_client.send(sendDp);
byte[] buf = new byte[1024];
DatagramPacket receiveDp = new DatagramPacket(buf, buf.length);
// 创建长度为100的数据接收包
while (true) {
Thread.sleep(50);
_client.receive(receiveDp); // 套接字接收数据包
String tmpStr = new String(buf, 0, receiveDp.getLength()).replace(" ", "");
Strs += tmpStr;
if (tmpStr.contains(SEND_CODE) && tmpStr.contains(",0")) {
String strdev = tmpStr + "|" + receiveDp.getAddress();
if (responses.indexOf(strdev) == -1) responses.add(strdev);
}
}
} catch (Exception e) {
if (listener != null) {
listener.onError(e);
}
}
if (listener != null) {
listener.onFinish(responses);
}
}
/**
* Constructor
*
* @param broadcastAddress destination address for probes
* @param handler update Handler in main thread
*/
public BroadcastDiscoveryClient(InetAddress broadcastAddress, Handler handler) {
mBroadcastAddress = broadcastAddress;
mHandler = handler;
try {
mSocket = new DatagramSocket(); // binds to random port
mSocket.setBroadcast(true);
} catch (SocketException e) {
Log.e(LOG_TAG, "Could not create broadcast client socket.", e);
throw new RuntimeException();
}
mProbeTimer = new Timer();
mProbeTimerTask =
new TimerTask() {
@Override
public void run() {
BroadcastDiscoveryClient.this.sendProbe();
}
};
Log.i(LOG_TAG, "Starting client on address " + mBroadcastAddress);
}
public CopyOfUdpClient(byte[] bytes) {
try {
udp = new DatagramSocket();
// 设置广播开关
udp.setBroadcast(false);
// recdp = new DatagramPacket(bytes, bytes.length,
// InetAddress.getByName("219.150.156.51"), UDP_PORT);
recdp = new DatagramPacket(bytes, bytes.length, InetAddress.getByName("127.0.0.1"), UDP_PORT);
udp.send(recdp);
udp.close();
} catch (SocketException e) {
System.out.println("创建端口监听客户端失败" + e);
e.printStackTrace();
} catch (UnknownHostException ex) {
System.out.println("UnknownHostException" + ex);
ex.printStackTrace();
} catch (IOException e) {
System.out.println("发送失败" + e);
e.printStackTrace();
}
}
@Override
public void run() {
try {
// Keep a socket open to listen to all the UDP trafic that is
// destined for this port
socket = new DatagramSocket(8888, InetAddress.getByName("0.0.0.0"));
socket.setBroadcast(true);
while (true) {
log.info("server >>>Ready to receive broadcast packets! on 0.0.0.0:8888");
// Receive a packet
byte[] recvBuf = new byte[15000];
DatagramPacket packet = new DatagramPacket(recvBuf, recvBuf.length);
socket.receive(packet);
// Packet received
log.info(
"server >>>Discovery packet received from: " + packet.getAddress().getHostAddress());
log.info("server >>>Packet received; data: " + new String(packet.getData()));
// See if the packet holds the right command (message)
String message = new String(packet.getData()).trim();
if (message.equals("DISCOVER_FUIFSERVER_REQUEST")) {
byte[] sendData = "DISCOVER_FUIFSERVER_RESPONSE".getBytes();
// Send a response
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, packet.getAddress(), packet.getPort());
socket.send(sendPacket);
log.info("server >>>Sent packet to: " + sendPacket.getAddress().getHostAddress());
}
}
} catch (Exception e) {
Logging.logException(e);
}
}
@Override
public void setBroadcast(boolean broadcast) {
try {
// See: https://github.com/netty/netty/issues/576
if (broadcast
&& !DetectionUtil.isWindows()
&& !DetectionUtil.isRoot()
&& !socket.getLocalAddress().isAnyLocalAddress()) {
// Warn a user about the fact that a non-root user can't receive a
// broadcast packet on *nix if the socket is bound on non-wildcard address.
logger.warn(
"A non-root user can't receive a broadcast packet if the socket "
+ "is not bound to a wildcard address; setting the SO_BROADCAST flag "
+ "anyway as requested on the socket which is bound to "
+ socket.getLocalSocketAddress()
+ '.');
}
socket.setBroadcast(broadcast);
} catch (SocketException e) {
throw new ChannelException(e);
}
}
@Override
public void run() {
// Open for voting
logger.log(Level.INFO, "Beginning voting");
voting.beginVoting();
VotingReceiver votingService = new VotingReceiver();
if (votingThread != null && !votingThread.isInterrupted()) {
votingThread.interrupt();
}
votingThread = new Thread(votingService);
votingThread.start();
try {
/*If client/server are on the same machine, broadcast may arrive at client
* before server opens receive socket. This is not relevant on separate machines
* but it avoids an extra voting cycle on single machine tests.
*/
Thread.sleep(200);
// Broadcast start of voting period
try {
DatagramSocket socket = new DatagramSocket();
InetSocketAddress address = new InetSocketAddress("255.255.255.255", VOTING_PORT);
byte[] message = new byte[0];
socket.setBroadcast(true);
DatagramPacket packet = new DatagramPacket(message, message.length);
packet.setSocketAddress(address);
socket.send(packet);
} catch (IOException e) {
logger.log(Level.SEVERE, null, e);
}
Thread.sleep(10000); // Run voting for 10 seconds
} catch (InterruptedException ex) {
logger.log(Level.INFO, "Voting shutting down");
}
votingThread.interrupt();
voting.endVoting(MCServer.this);
}
@Override
public void run() {
DatagramSocket socket = null;
try {
socket = new DatagramSocket(PORT);
socket.setReuseAddress(true);
socket.setBroadcast(true);
try {
while (mTransmit) {
byte[] buffer = new byte[Packet.LENGTH];
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
socket.receive(packet);
final Packet p = new Packet(buffer);
if (!p.mValid) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
mScreen.setBackgroundColor(Color.rgb(255, 255, 0));
}
});
Log.w(TAG, "Got bogus message");
continue;
}
// Handle keep alive
if (mKeepAliveThread != null && mKeepAliveThread.mInterval != p.mKeepAliveInterval) {
mKeepAliveThread.stopTransmission();
try {
mKeepAliveThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
mKeepAliveThread = null;
runOnUiThread(
new Runnable() {
@Override
public void run() {
mKeepAliveText.setText("");
}
});
}
if (mKeepAliveThread == null && p.mKeepAliveInterval != 0) {
runOnUiThread(
new Runnable() {
@Override
public void run() {
mKeepAliveText.setText("" + p.mKeepAliveInterval);
}
});
mKeepAliveThread =
new KeepAliveThread(packet.getAddress().getHostAddress(), p.mKeepAliveInterval);
mKeepAliveThread.start();
}
// We got a sequence number below that of the previous - reset!
if (mLastPacket > p.mPacketNumber) {
mLastPacket = 0;
mLostPackets = 0;
mPacketCount = 0;
}
if (mLastPacket != 0) {
mLostPackets += (p.mPacketNumber - mLastPacket) - 1;
}
mLastPacket = p.mPacketNumber;
mPacketCount += 1;
runOnUiThread(
new Runnable() {
@Override
public void run() {
resetAnimation(p.mSendInterval);
mLastPacketText.setText("" + p.mPacketNumber);
mPacketCountText.setText("" + mPacketCount);
mLostPacketsText.setText("" + mLostPackets);
}
});
}
} catch (IOException e) {
e.printStackTrace();
}
} catch (SocketException e) {
e.printStackTrace();
} finally {
if (socket != null) {
socket.close();
}
}
}
@Override
public void run() {
// TODO Auto-generated method stub
while (running) {
if (isDebug) Log.i(TAG, "5s扫描设备>>>>>>>>>>>>" + Thread.currentThread());
receive = 50; // 最大接收数量
isSend = false;
String recestr = null;
try {
listDevices.clear();
sendSocket = new DatagramSocket();
sendSocket.setBroadcast(true);
sendSocket.setSoTimeout(3000);
sendSocket.send(sendPacket);
while (receive-- > 0) {
sendSocket.receive(recePacket);
recestr = new String(recedata, recePacket.getOffset(), recePacket.getLength());
if (recestr.startsWith(DISCOVERY_RESP)) {
Device device = new Device();
device.setDeviceName(recestr.substring(9));
device.setDeviceIp(recePacket.getAddress().getHostAddress());
if (listDevices.indexOf(device) < 0) {
listDevices.add(device);
if (device.getDeviceIp().equals("10.8.8.1")) {
isSend = true;
if (isDebug) Log.i(TAG, "扫描到10.8.8.1" + listDevices + "|" + Thread.currentThread());
sendResult();
break;
}
}
}
// 每次接收完UDP数据后，重置长度。否则可能会导致下次收到数据包被截断。
recePacket.setLength(default_bufferSize);
}
} catch (SocketTimeoutException e) {
if (isDebug) Log.i(TAG, "扫描3s超时" + listDevices + "|" + Thread.currentThread());
if (!isSend) {
sendResult();
}
} catch (SocketException e) {
receive = 0;
if (isDebug) Log.i(TAG, "SocketException>>>>>>" + Thread.currentThread());
if (mScanListener != null) {
mScanListener.scanException();
}
} catch (IOException e) {
receive = 0;
if (isDebug) Log.i(TAG, "SocketException>>>>>>" + Thread.currentThread());
if (mScanListener != null) {
mScanListener.scanException();
}
}
sendSocket.close();
if (wipicoVersion >= 2) {
// 版本2才进行SSID 扫描
List<ScanResult> listScanResults = WifiAdmin.getInstance(mContext).getScanResults();
if (listScanResults != null) {
for (ScanResult bean : listScanResults) {
if (DeviceUtil.isMatchSSID(DeviceUtil.ssidCorrect(bean.SSID))) {
listWifiDevices.add(
new Device(DeviceUtil.ssidCorrect(bean.SSID), bean.capabilities, null));
}
}
}
sendWifiResult();
}
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
/**
* Automatic UDP discovery of a MAX!Cube
*
* @return if the cube is found, returns the IP address as a string. Otherwise returns null
*/
public static final String discoverIp() {
String maxCubeIP = null;
String maxCubeName = null;
String rfAddress = null;
Logger logger = LoggerFactory.getLogger(MaxCubeDiscover.class);
// Find the MaxCube using UDP broadcast
try {
DatagramSocket bcSend = new DatagramSocket();
bcSend.setBroadcast(true);
byte[] sendData = "eQ3Max*\0**********I".getBytes();
// Broadcast the message over all the network interfaces
Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
NetworkInterface networkInterface = (NetworkInterface) interfaces.nextElement();
if (networkInterface.isLoopback() || !networkInterface.isUp()) {
continue;
}
for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
InetAddress broadcast = interfaceAddress.getBroadcast();
if (broadcast == null) {
continue;
}
// Send the broadcast package!
try {
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, broadcast, 23272);
bcSend.send(sendPacket);
} catch (Exception e) {
logger.debug(e.getMessage());
logger.debug(Utils.getStackTrace(e));
}
logger.trace(
"Request packet sent to: {} Interface: {}",
broadcast.getHostAddress(),
networkInterface.getDisplayName());
}
}
logger.trace("Done looping over all network interfaces. Now waiting for a reply!");
bcSend.close();
DatagramSocket bcReceipt = new DatagramSocket(23272);
bcReceipt.setReuseAddress(true);
// Wait for a response
byte[] recvBuf = new byte[15000];
DatagramPacket receivePacket = new DatagramPacket(recvBuf, recvBuf.length);
bcReceipt.receive(receivePacket);
// We have a response
logger.trace("Broadcast response from server: {}", receivePacket.getAddress());
// Check if the message is correct
String message = new String(receivePacket.getData()).trim();
if (message.startsWith("eQ3Max")) {
maxCubeIP = receivePacket.getAddress().getHostAddress();
maxCubeName = message.substring(0, 8);
rfAddress = message.substring(8, 18);
logger.debug("Found at: {}", maxCubeIP);
logger.debug("Name : {}", maxCubeName);
logger.debug("Serial : {}", rfAddress);
logger.trace("Message : {}", message);
} else {
logger.info("No Max!Cube gateway found on network");
}
// Close the port!
bcReceipt.close();
} catch (IOException ex) {
logger.debug(ex.toString());
}
return maxCubeIP;
}
@Override
protected Void doInBackground(Void... params) {
Log.d("Discovery: ", "start UDP Server");
String data = "0::deskcon";
try {
// Send "Ask for Hosts" Broadcast
serverSocketUDP = new DatagramSocket(5108);
serverSocketUDP.setBroadcast(true);
InetAddress local = getBroadcast();
// has a broadcast address been found
if (local == null) {
Log.d("Discovery: ", "no Broadcast Address found");
return null;
}
DatagramPacket packet = new DatagramPacket(data.getBytes(), data.length(), local, 5108);
serverSocketUDP.send(packet);
} catch (Exception e) {
e.printStackTrace();
Log.d("Discovery: ", "could not start");
return null;
}
WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
MulticastLock lock = wifi.createMulticastLock("net.screenfreeze.deskcon");
lock.acquire();
// Receive responses from desktop hosts
while (!isStopped) {
byte[] receiveData = new byte[128];
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
try {
serverSocketUDP.receive(receivePacket);
} catch (Exception e) {
}
final InetAddress address = receivePacket.getAddress();
String msg = new String(receiveData, 0, receivePacket.getLength());
// Check for valid msg
boolean isvalismsg = msg.split("::").length == 3;
// Process msg if it is not our own broadcast msg
if (!msg.equals(data) && !isStopped && isvalismsg) {
final DesktopHost desktop = handleReceiveUdp(msg, address);
Log.d("udp from: ", "msg " + msg + " " + address);
runOnUiThread(
new Runnable() {
@Override
public void run() {
dha.add(desktop);
}
});
}
}
lock.release();
return null;
}
public List<MsgEvent> discover() {
List<MsgEvent> discoveryList = null;
// Find the server using UDP broadcast
try {
discoveryList = new ArrayList<MsgEvent>();
// Open a random port to send the package
c = new DatagramSocket();
c.setBroadcast(true);
byte[] sendData = "DISCOVER_FUIFSERVER_REQUEST".getBytes();
// Try the 255.255.255.255 first
try {
DatagramPacket sendPacket =
new DatagramPacket(
sendData, sendData.length, InetAddress.getByName("255.255.255.255"), 32005);
c.send(sendPacket);
// System.out.println(getClass().getName() + ">>> Request packet sent to: 255.255.255.255
// (DEFAULT)");
} catch (Exception e) {
}
// Broadcast the message over all the network interfaces
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
NetworkInterface networkInterface = (NetworkInterface) interfaces.nextElement();
if (networkInterface.isLoopback() || !networkInterface.isUp()) {
continue; // Don't want to broadcast to the loopback interface
}
for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
InetAddress broadcast = interfaceAddress.getBroadcast();
if (broadcast == null) {
continue;
}
// Send the broadcast package!
try {
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, broadcast, 32005);
c.send(sendPacket);
} catch (Exception e) {
}
// System.out.println(getClass().getName() + ">>> Request packet sent to: " +
// broadcast.getHostAddress() + "; Interface: " + networkInterface.getDisplayName());
}
}
// System.out.println(getClass().getName() + ">>> Done looping over all network interfaces.
// Now waiting for a reply!");
// Wait for a response
while (!c.isClosed()) {
try {
byte[] recvBuf = new byte[15000];
DatagramPacket receivePacket = new DatagramPacket(recvBuf, recvBuf.length);
c.receive(receivePacket);
// We have a response
// System.out.println(getClass().getName() + ">>> Broadcast response from server: " +
// receivePacket.getAddress().getHostAddress());
// Check if the message is correct
// System.out.println(new String(receivePacket.getData()));
String json = new String(receivePacket.getData()).trim();
// String response = "region=region0,agent=agent0,recaddr=" +
// packet.getAddress().getHostAddress();
try {
MsgEvent me = gson.fromJson(json, MsgEvent.class);
if (me != null) {
if (!me.getParam("clientip").equals(receivePacket.getAddress().getHostAddress())) {
// System.out.println("SAME HOST");
// System.out.println(me.getParamsString() +
// receivePacket.getAddress().getHostAddress());
me.setParam("serverip", receivePacket.getAddress().getHostAddress());
discoveryList.add(me);
}
}
} catch (Exception ex) {
System.out.println("in loop 0" + ex.toString());
}
} catch (SocketException ex) {
// eat message.. this should happen
} catch (Exception ex) {
System.out.println("in loop 1" + ex.toString());
}
}
// Close the port!
// c.close();
// System.out.println("CODY : Dicsicer Client Worker Engned!");
} catch (Exception ex) {
System.out.println("while not closed: " + ex.toString());
}
return discoveryList;
}
public ArrayList<InetAddress> ping() {
ArrayList<InetAddress> ret = new ArrayList<InetAddress>();
// Find the server using UDP broadcast
try {
// Open a random port to send the package
DatagramSocket c = new DatagramSocket();
c.setBroadcast(true);
byte[] sendData = "DISCOVER_FUIFSERVER_REQUEST".getBytes();
// Try the 255.255.255.255 first
try {
log.info("client >>> sending request packet to: 255.255.255.255:8888 (DEFAULT)");
DatagramPacket sendPacket =
new DatagramPacket(
sendData, sendData.length, InetAddress.getByName("255.255.255.255"), 8888);
c.send(sendPacket);
byte[] recvBuf = new byte[15000];
DatagramPacket pong = new DatagramPacket(recvBuf, recvBuf.length);
c.receive(pong);
log.info("client >>> recieved PONG");
} catch (Exception e) {
}
// Broadcast the message over all the network interfaces
Enumeration interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
NetworkInterface networkInterface = (NetworkInterface) interfaces.nextElement();
if (networkInterface.isLoopback() || !networkInterface.isUp()) {
continue; // Don't want to broadcast to the loopback
// interface
}
for (InterfaceAddress interfaceAddress : networkInterface.getInterfaceAddresses()) {
InetAddress broadcast = interfaceAddress.getBroadcast();
if (broadcast == null) {
continue;
}
// Send the broadcast package!
try {
log.info("client >>> sending request packet to: 255.255.255.255:8888 (DEFAULT)");
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, broadcast, 8888);
c.send(sendPacket);
} catch (Exception e) {
}
log.info(
"client >>> Request packet sent to: "
+ broadcast.getHostAddress()
+ "; Interface: "
+ networkInterface.getDisplayName());
}
}
log.info(">>> Done looping over all network interfaces. Now waiting for a reply!");
// Wait for a response
byte[] recvBuf = new byte[15000];
DatagramPacket receivePacket = new DatagramPacket(recvBuf, recvBuf.length);
c.receive(receivePacket);
// We have a response
log.info(
">>> Broadcast response from server: " + receivePacket.getAddress().getHostAddress());
// Check if the message is correct
String message = new String(receivePacket.getData()).trim();
if (message.equals("DISCOVER_FUIFSERVER_RESPONSE")) {
// DO SOMETHING WITH THE SERVER'S IP (for example, store it in
// your controller)
// Controller_Base.setServerIp(receivePacket.getAddress());
ret.add(receivePacket.getAddress());
}
// Close the port!
c.close();
} catch (IOException e) {
Logging.logException(e);
}
return ret;
}
@Override
public void run() {
long id = System.currentTimeMillis();
running = true;
log.info("Beacon thread starting");
long lastBeacon = System.currentTimeMillis() - BEACON_GAP;
while (running) {
while (running && (System.currentTimeMillis() - lastBeacon) < BEACON_GAP) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
}
if (!running) continue;
DatagramSocket socket = null;
try {
CentralBeacon beaconPackage =
CentralBeacon.newBuilder()
.setServerVersion(Central.VERSION)
.setSensorPort(deviceServer.getPort())
.setApiPort(apiServer.getPort())
.setServerId(id)
.build();
ByteArrayOutputStream data = new ByteArrayOutputStream();
beaconPackage.writeDelimitedTo(data);
socket = new DatagramSocket();
socket.setBroadcast(true);
List<InetAddress> broadcasts = new LinkedList<InetAddress>();
// Add global broadcast address
try {
broadcasts.add(InetAddress.getByName("255.255.255.255"));
} catch (UnknownHostException e) {
}
// Add all broadcast addresses for all known links
Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces();
while (interfaces.hasMoreElements()) {
NetworkInterface networkInterface = interfaces.nextElement();
if (networkInterface.isLoopback() || !networkInterface.isUp()) {
continue; // Skip loopback and interfaces that are down
}
for (InterfaceAddress address : networkInterface.getInterfaceAddresses()) {
broadcasts.add(address.getBroadcast());
}
}
// Send the beacon package on all braodcast addresses we got
for (InetAddress address : broadcasts) {
try {
socket.send(
new DatagramPacket(data.toByteArray(), data.toByteArray().length, address, 12354));
// log.info("Beacon package sent to "+address.getHostAddress());
} catch (Exception e) {
// Ignore
}
}
} catch (SocketException e) {
log.warning("SocketException in beacon send block");
log.warning(e.toString());
} catch (IOException e) {
log.warning("IOException in beacon send block");
log.warning(e.toString());
} finally {
lastBeacon = System.currentTimeMillis();
if (socket != null) {
socket.close();
}
}
}
log.info("Beacon thread stopping");
}