public void run() {
if (ServerSocket == null) return;
while (true) {
try {
InetAddress address;
int port;
DatagramPacket packet;
byte[] data = new byte[1460];
packet = new DatagramPacket(data, data.length);
ServerSocket.receive(packet);
//
//
address = packet.getAddress();
port = packet.getPort();
System.out.println("get the Client port is: " + port);
System.out.println("get the data length is: " + data.length);
FileWriter fw = new FileWriter("Fortunes.txt");
PrintWriter out = new PrintWriter(fw);
for (int i = 0; i < data.length; i++) {
out.print(data[i] + " ");
}
out.close();
System.out.println("Data has been writen to destination!");
packet = new DatagramPacket(data, data.length, address, port);
ServerSocket.send(packet);
System.out.println("Respond has been made!");
} catch (Exception e) {
System.err.println("Exception: " + e);
e.printStackTrace();
}
}
}
@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);
}
}
@Override
public void run() {
while (true) {
try {
byte[] dataBuffer = new byte[25600]; // 25kB buffer
DatagramPacket packet = new DatagramPacket(dataBuffer, dataBuffer.length);
multiplexerSocket.receive(packet);
// Check if packet is valid
int type = dataBuffer[0] >>> 4;
int version = dataBuffer[0] & 0x7;
if (version == Packet.VERSION) {
try {
Packet utpPacket = packetFactory.getFromId(type);
Stream inStream = new Stream(packet.getData(), packet.getOffset(), packet.getLength());
utpPacket.read(inStream);
UtpSocket socket = new UtpSocket(utpPacket.getConnectionId());
socket = utpSockets.find(socket);
if (socket != null) {
// log("Received " + utpPacket.getClass().getSimpleName() + " for " +
// (utpPacket.getConnectionId() & 0xFFFF));
socket.updateLastInteraction();
utpPacket.process(socket);
} else {
// log("Packet of " + packet.getLength() + " bytes (0x" +
// Integer.toHexString(dataBuffer[0]) + ") was send to a connection which was not
// established (" + packet.getAddress() + ":" + packet.getPort() + " | " +
// utpPacket.getConnectionId() + ")");
}
} catch (IllegalArgumentException e) {
log(
"Invalid Packet of "
+ packet.getLength()
+ " bytes with type "
+ type
+ " ("
+ packet.getAddress()
+ ":"
+ packet.getPort()
+ ")",
true);
}
} else {
log(
"Invalid Packet of "
+ packet.getLength()
+ " bytes with version "
+ version
+ " ("
+ packet.getAddress()
+ ":"
+ packet.getPort()
+ ")",
true);
}
} catch (IOException e) {
}
}
}
@Scheduled(fixedDelay = Integer.MAX_VALUE)
public void startListening() {
if (disable) {
return;
}
log.info("Starting UPNP Discovery Listener");
try (DatagramSocket responseSocket = new DatagramSocket(upnpResponsePort);
MulticastSocket upnpMulticastSocket = new MulticastSocket(UPNP_DISCOVERY_PORT); ) {
InetSocketAddress socketAddress =
new InetSocketAddress(UPNP_MULTICAST_ADDRESS, UPNP_DISCOVERY_PORT);
Enumeration<NetworkInterface> ifs = NetworkInterface.getNetworkInterfaces();
while (ifs.hasMoreElements()) {
NetworkInterface xface = ifs.nextElement();
Enumeration<InetAddress> addrs = xface.getInetAddresses();
String name = xface.getName();
int IPsPerNic = 0;
while (addrs.hasMoreElements()) {
InetAddress addr = addrs.nextElement();
log.debug(name + " ... has addr " + addr);
if (InetAddressUtils.isIPv4Address(addr.getHostAddress())) {
IPsPerNic++;
}
}
log.debug("Checking " + name + " to our interface set");
if (IPsPerNic > 0) {
upnpMulticastSocket.joinGroup(socketAddress, xface);
log.debug("Adding " + name + " to our interface set");
}
}
while (true) { // trigger shutdown here
byte[] buf = new byte[1024];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
upnpMulticastSocket.receive(packet);
String packetString = new String(packet.getData());
if (isSSDPDiscovery(packetString)) {
log.debug(
"Got SSDP Discovery packet from "
+ packet.getAddress().getHostAddress()
+ ":"
+ packet.getPort());
sendUpnpResponse(responseSocket, packet.getAddress(), packet.getPort());
}
}
} catch (IOException e) {
log.error("UpnpListener encountered an error. Shutting down", e);
ConfigurableApplicationContext context =
(ConfigurableApplicationContext) UpnpListener.this.applicationContext;
context.close();
}
log.info("UPNP Discovery Listener Stopped");
}
public void run() {
while (listen) {
try {
byte[] buf = new byte[256];
byte[] buf2 = new byte[256];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
InetAddress address;
socket.receive(packet);
String in = new String(packet.getData(), 0, packet.getLength());
address = packet.getAddress();
int port = packet.getPort();
// newClient = findPort(port, address, newClient);
String name = findPerson(port, address);
// System.out.println(name);
if (in.startsWith("1")) {
String nama = new String(packet.getData(), 0, packet.getLength());
nama = nama.substring(1);
newClient = new Client(packet.getAddress(), packet.getPort(), nama);
threads.add(newClient);
String wel =
"\nWelcome "
+ newClient.nama
+ "\n "
+ "to quit type \"bye\" and to whisper use prefix @name : ";
buf = (wel).getBytes();
packet = new DatagramPacket(buf, buf.length, packet.getAddress(), packet.getPort());
socket.send(packet);
wel = " enters the room";
buf = (newClient.nama + wel).getBytes();
Broadcast(address, port, buf);
} else if (in.startsWith("@")) {
// findPort(port, address, newClient);
Whisper(newClient, packet.getData());
} else if (in.equals("bye")) {
String bye = name + " is leaving";
buf2 = bye.getBytes();
// packet = new DatagramPacket(buf,buf.length,newClient.address, newClient.port);
Broadcast(address, port, buf2);
} else {
byte[] buf3 = new byte[256];
String text =
name + "<broadcast> : " + new String(packet.getData(), 0, packet.getLength());
buf3 = text.getBytes();
Broadcast(packet.getAddress(), packet.getPort(), buf3);
}
} catch (IOException ex) {
Logger.getLogger(DatagramServer.class.getName()).log(Level.SEVERE, null, ex);
}
}
socket.close();
}
public void run() {
try {
byte buf[] = new byte[DNSConstants.MAX_MSG_ABSOLUTE];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
while (this._jmDNSImpl.getState() != DNSState.CANCELED) {
packet.setLength(buf.length);
this._jmDNSImpl.getSocket().receive(packet);
if (this._jmDNSImpl.getState() == DNSState.CANCELED) {
break;
}
try {
if (this._jmDNSImpl.getLocalHost().shouldIgnorePacket(packet)) {
continue;
}
DNSIncoming msg = new DNSIncoming(packet);
logger.finest("SocketListener.run() JmDNS in:" + msg.print(true));
this._jmDNSImpl.ioLock();
try {
if (msg.isQuery()) {
if (packet.getPort() != DNSConstants.MDNS_PORT) {
this._jmDNSImpl.handleQuery(msg, packet.getAddress(), packet.getPort());
}
this._jmDNSImpl.handleQuery(msg, this._jmDNSImpl.getGroup(), DNSConstants.MDNS_PORT);
} else {
this._jmDNSImpl.handleResponse(msg);
}
} finally {
this._jmDNSImpl.ioUnlock();
}
} catch (IOException e) {
logger.log(Level.WARNING, "run() exception ", e);
}
}
} catch (IOException e) {
if (this._jmDNSImpl.getState() != DNSState.CANCELED) {
logger.log(Level.WARNING, "run() exception ", e);
this._jmDNSImpl.recover();
}
}
// jP: 20010-01-18. Per issue #2933183. If this thread was stopped
// by closeMulticastSocket, we need to signal the other party via
// the jmDNS monitor. The other guy will then check to see if this
// thread has died.
// Note: This is placed here to avoid locking the IoLock object and
// 'this' instance together.
synchronized (this._jmDNSImpl) {
this._jmDNSImpl.notifyAll();
}
}
/**
* Empfangen einer Nachricht ueber UDP
*
* @return Referenz auf Nachricht, die empfangen wurde
* @param timeout Wartezeit in ms
* @throws IOException
*/
public Object receive(int timeout) throws IOException, SocketTimeoutException {
// Maximale Wartezeit fuer Receive am Socket einstellen
try {
log.info("RECEIVE MIT TIMEOUT: " + timeout);
socket.setSoTimeout(timeout);
// System.out.println("RECEIVE: Maximale Wartezeit: " +
// timeout +" ms");
} catch (SocketException e) {
log.error("RECEIVE: " + "Fehler beim Einstellen der maximalen Wartezeit");
throw e;
}
byte[] bytes = new byte[65527];
DatagramPacket packet = new DatagramPacket(bytes, bytes.length);
// System.out.println("VOR: Empfangene Datenlaenge: " + packet.getLength());
try {
// Blockiert nur, bis Timeout abgelaufen ist
socket.receive(packet);
log.debug("RECEIVE: Empfangene Datenlaenge: " + packet.getLength());
System.out.println("RECEIVE: Empfangene Datenlaenge: " + packet.getLength());
} catch (IOException e2) {
log.error("RECEIVE: " + "Fehler beim Empfangen einer PDU ueber UDP", e2);
throw e2;
}
ByteArrayInputStream bais = new ByteArrayInputStream(packet.getData());
ObjectInputStream ois = new ObjectInputStream(bais);
Object pdu;
try {
// System.out.println("RECEIVE: " +
// "Verfuegbare Bytes Inputstream des UDP-Sockets:" +
// ois.available());
pdu = ois.readObject();
remoteAddress = packet.getAddress();
remotePort = packet.getPort();
log.debug("RECEIVE: " + packet.getPort() + "->" + socket.getLocalPort());
} catch (ClassNotFoundException e) {
log.error("RECEIVE: " + "ClassNotFoundException:", e);
return null;
}
log.info("RECEIVE MIT TIMEOUT ENDE: " + timeout);
return pdu;
}
public static void main(String[] args) throws IOException {
/* 接受发过来的数据 */
// 创建upd socket服务对象
DatagramSocket ds = new DatagramSocket(10039);
// 创建数据包，用于存储接收到的数据
byte[] bbuf = new byte[1024];
DatagramPacket dp = new DatagramPacket(bbuf, bbuf.length);
// 用socket对象的receive方法将接收到的数据存储到数据包中
ds.receive(dp);
// 获取ip
String ip = dp.getAddress().getHostAddress();
int port = dp.getPort();
// 获取数据内容
byte[] data = dp.getData();
String text = new String(data, 0, dp.getLength());
System.out.println(ip + ":" + port + ":" + text);
ds.close();
}
public List<EventReply> receive() throws IOException {
byte[] buf = new byte[0xff];
DatagramPacket packet = new DatagramPacket(buf, 0, 0xff);
m_dgSocket.receive(packet);
byte[] data = packet.getData();
// System.out.println("receive data is : "+new String(data,"utf-8"));
StringReader reader = new StringReader(new String(data, 0, packet.getLength(), "utf-8"));
EventReceipt receipt = null;
try {
receipt = (EventReceipt) Unmarshaller.unmarshal(EventReceipt.class, reader);
} catch (MarshalException e) {
e.printStackTrace();
} catch (ValidationException e) {
e.printStackTrace();
}
InetAddress remoteAddr = packet.getAddress();
int port = packet.getPort();
List<EventReply> replys = new ArrayList<EventReply>();
if (receipt != null) {
String[] uuids = receipt.getUuid();
for (String uuid : uuids) {
EventReply reply = new EventReply(remoteAddr, port, uuid);
replys.add(reply);
}
}
return replys;
}
public void run() {
while (true) {
try {
// System.out.println("Waiting for client on port " +serverSocket.getLocalPort() + "...");
byte[] receiveBuffer = new byte[512];
DatagramPacket receivePacket = new DatagramPacket(receiveBuffer, receiveBuffer.length);
UDPserverSocket.receive(receivePacket);
System.out.println(
"Request received from "
+ receivePacket.getSocketAddress()
+ ":"
+ receivePacket.getPort());
// Start new 'Servant' thread and make it serve the peer
new Servant(receivePacket, UDPserverSocket).start();
// socketFromPeer.close();
} catch (SocketTimeoutException s) {
System.out.println("Socket timed out!");
break;
} catch (IOException e) {
e.printStackTrace();
break;
}
}
}
public static void doEcho(int port) throws IOException {
byte[] buf = new byte[BUF_SIZE];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
DatagramSocket sock = new DatagramSocket(port);
System.out.println(
"Starting UDP echo on"
+ sock.getLocalAddress().getHostAddress()
+ ":"
+ sock.getLocalPort());
while (true) {
try {
sock.receive(packet);
sock.send(packet);
System.out.print(
"UDP From: "
+ packet.getAddress().getHostAddress()
+ ":"
+ packet.getPort()
+ "\n"
+ new String(packet.getData(), 0, packet.getLength())
+ "\n");
System.out.flush();
packet.setLength(buf.length);
// packet = new DatagramPacket(buf,buf.length);
} catch (IOException io_ex) {
}
}
}
/**
* Copies the properties of a specific <tt>DatagramPacket</tt> to another <tt>DatagramPacket</tt>.
* The property values are not cloned.
*
* @param src the <tt>DatagramPacket</tt> which is to have its properties copied to <tt>dest</tt>
* @param dest the <tt>DatagramPacket</tt> which is to have its properties set to the value of the
* respective properties of <tt>src</tt>
*/
public static void copy(DatagramPacket src, DatagramPacket dest) {
synchronized (dest) {
dest.setAddress(src.getAddress());
dest.setPort(src.getPort());
byte[] srcData = src.getData();
if (srcData == null) dest.setLength(0);
else {
byte[] destData = dest.getData();
if (destData == null) dest.setLength(0);
else {
int destOffset = dest.getOffset();
int destLength = destData.length - destOffset;
int srcLength = src.getLength();
if (destLength >= srcLength) destLength = srcLength;
else if (logger.isLoggable(Level.WARNING)) {
logger.log(Level.WARNING, "Truncating received DatagramPacket data!");
}
System.arraycopy(srcData, src.getOffset(), destData, destOffset, destLength);
dest.setLength(destLength);
}
}
}
}
public void run() {
boolean bContinue = true;
while (bContinue) {
try {
byte[] buf = new byte[256];
DatagramPacket packet = new DatagramPacket(buf, buf.length);
/** wait here for incoming data */
socket.receive(packet);
/** received data */
InetAddress address = packet.getAddress();
int port = packet.getPort();
byte[] data = packet.getData();
/** deserialize the data into a String object (what we expect) */
ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(data));
String sData = (String) in.readObject();
in.close();
String sText = ui.getTextIncoming().getText();
sText += address.getHostAddress() + ":" + port + " " + sData + "\n";
ui.getTextIncoming().setText(sText);
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
public void startServer() {
try {
serverSocket = MyUtil.getSocket();
log.info(MyUtil.getMyIPAddress());
log.info(MyUtil.getPort());
byte[] receiveData = new byte[1024];
byte[] sendData = new byte[1024];
while (true) {
log.info("RPCServer.main() Running");
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
serverSocket.receive(receivePacket);
InetAddress IPAddress = receivePacket.getAddress();
int port = receivePacket.getPort();
log.info(
"============================================Packet Received from :"
+ IPAddress.getHostAddress());
log.info("=============================================Packet Recieved from Port:" + port);
sendData = proccessRequest(receiveData);
log.info(
"=============================================Sending Response :"
+ new String(sendData));
DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, port);
serverSocket.send(sendPacket);
}
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/** Receive loop for private messaqes. Can be stopped with {@link #setRunning(boolean)} */
private void receivePrivateMessages() {
while (isRunning()) {
try {
final byte[] buf = new byte[BUFFER_SIZE];
final DatagramPacket receivePacket = new DatagramPacket(buf, buf.length);
if (LOG.isDebugEnabled()) {
LOG.debug(
"Waiting for private message, listening on port " + privateSocket.getLocalPort());
}
privateSocket.receive(receivePacket); // wait for a packet
final String data = toString(receivePacket);
if (LOG.isDebugEnabled()) {
LOG.debug("Got a private message: " + data);
}
if (LOG.isDebugEnabled()) {
LOG.debug(
"Received "
+ data
+ " from "
+ receivePacket.getAddress()
+ ":"
+ receivePacket.getPort()
+ ".");
}
processPrivateMessage(data);
} catch (IOException e) {
LOG.error(BUNDLE_MARKER, e.toString(), e);
}
}
if (LOG.isDebugEnabled()) {
LOG.debug("Stopped listening to private messages.");
}
}
private void listen() throws Exception {
System.out.println("Listening on port: " + serverPort);
// Initialize socket
socket = new DatagramSocket(serverPort);
// While running
while (run) {
// Wait for handshake
packet = new DatagramPacket(response, response.length);
socket.receive(packet); // Blocking
// System.out.println("RT: got packet");
Packet p = new Packet(packet.getData());
if (p.isHandshake()) {
// System.out.println("RT: is handshake");
// Get client connection info
InetAddress IPAddress = packet.getAddress();
int port = packet.getPort();
// Process handshake
processHandshake(p, IPAddress, port);
// Get message
MyMessage message = getMessage();
if (message != null) {
rc.rreceive(message);
}
}
}
}
/** Wait until there more data to process */
public synchronized void sendAndWaitUntilNextUdpMessage(UDPMessage message) throws Exception {
byte[] response = Serializer.serialize(message);
DatagramPacket reply =
new DatagramPacket(
response, response.length, receivedDatagram.getAddress(), receivedDatagram.getPort());
try {
// lock to wait for next DatagramPacket which is the answer of this reply
waitForNextDatagram = true;
aSocket.send(reply);
// wait for the response before continuing
while (waitForNextDatagram) {
try {
this.wait();
} catch (Exception e) {
}
}
waitForNextDatagram = true;
} catch (Exception e) {
// handled by the parent function
throw e;
}
}
public static void main(String[] args) throws IOException {
String strSend = "Hello ANDROID";
byte[] buf = new byte[1024];
// 服务端在3000端口监听接收到的数据
DatagramSocket ds = new DatagramSocket(3000);
// 接收从客户端发送过来的数据
DatagramPacket dpReceive = new DatagramPacket(buf, 1024);
System.out.println("server is on，waiting for client to send data......");
boolean f = true;
while (f) {
// 服务器端接收来自客户端的数据
ds.receive(dpReceive);
System.out.println("server received data from client：");
String strReceive =
new String(dpReceive.getData(), 0, dpReceive.getLength())
+ " from "
+ dpReceive.getAddress().getHostAddress()
+ ":"
+ dpReceive.getPort();
System.out.println(strReceive);
// 数据发动到客户端的3000端口
DatagramPacket dpSend =
new DatagramPacket(strSend.getBytes(), strSend.length(), dpReceive.getAddress(), 9000);
ds.send(dpSend);
// 由于dp_receive在接收了数据之后，其内部消息长度值会变为实际接收的消息的字节数，
// 所以这里要将dp_receive的内部消息长度重新置为1024
dpReceive.setLength(1024);
}
ds.close();
}
// usado por quem vai receber o arquivo
public miniSocket(
int porta_servidor, InetAddress endereco_servidor, FileOutputStream arquivo_receber)
throws IOException {
this.arquivo_receber = arquivo_receber;
real_socket = new DatagramSocket();
this.server_port = porta_servidor;
this.server_adress = endereco_servidor;
DatagramPacket receiver =
new DatagramPacket(new byte[Pacote.head_payload], Pacote.head_payload);
while (!connect.get()) {
for (int i = 0; i < max_win; i++) {
real_socket.send(
new DatagramPacket(SYN_BYTE, Pacote.head_payload, endereco_servidor, porta_servidor));
}
new Timer().scheduleAtFixedRate(new try_connect(), 300, 300);
real_socket.receive(receiver);
if (receiver.getAddress().equals(endereco_servidor) && receiver.getPort() == porta_servidor) {
connect.set(true);
} else {
System.out.println("Conexao comprometida....");
}
}
new Thread(new Receiver()).start();
}
public static void main(String args[]) {
DatagramSocket skt = null;
try {
skt = new DatagramSocket(6789);
byte[] buffer = new byte[1000];
while (true) {
DatagramPacket request = new DatagramPacket(buffer, buffer.length);
skt.receive(request);
System.out.println("Data received from client");
System.out.println(new String(request.getData()));
Thread.sleep(15000);
String[] arrayMsg = (new String(request.getData())).split(" ");
System.out.println(arrayMsg[0] + "server processed");
byte[] sendMsg = (arrayMsg[0] + "server processed").getBytes();
DatagramPacket reply =
new DatagramPacket(sendMsg, sendMsg.length, request.getAddress(), request.getPort());
System.out.println("sending data from server to client");
Thread.sleep(15000);
;
skt.send(reply);
}
} catch (Exception e) {
}
}
public static void displayInfo(DatagramPacket packet) {
System.out.println("Received: ");
System.out.println("IP Address: " + packet.getAddress());
System.out.println("Port: " + packet.getPort());
System.out.println("Date: " + new Date());
System.out.println("Message: " + new String(packet.getData()));
}
@Override
public SctpChannel accept()
throws IOException, SctpException, InvalidKeyException, NoSuchAlgorithmException {
logger.setLevel(Level.INFO);
DatagramPacket receivePacket = new DatagramPacket(buffer, buffer.length);
SctpPacket packet = null;
while (true) {
serverSocket.receive(receivePacket);
try {
packet = new SctpPacket(buffer, 0, receivePacket.getLength());
} catch (SctpException e) {
logger.log(Level.WARNING, e.getMessage());
continue;
}
logger.log(Level.INFO, "receive new packet");
InetSocketAddress address =
new InetSocketAddress(receivePacket.getAddress(), receivePacket.getPort());
packet.apply(address, this);
Association association = pendingAssociations.get(address);
if (association != null && association.getState() == State.ESTABLISHED) {
return new SctpChannel(association);
}
}
}
public void runReceivingDispather() {
int i = 0;
// change this to 2 loops
while (i < 2) {
// receiveData = new byte[12];
receivePacket = new DatagramPacket(receiveData, receiveData.length);
System.out.println("Dispatcher");
try {
serverSocket.receive(receivePacket);
} catch (IOException ex) {
Logger.getLogger(DispatcherReceiver.class.getName()).log(Level.SEVERE, null, ex);
}
String temp = this.assignReceiver(receivePacket);
// returns the port number for receiver server
sendData = temp.getBytes();
InetAddress address = receivePacket.getAddress();
int tempPort = receivePacket.getPort();
sendPacket = new DatagramPacket(sendData, sendData.length, address, tempPort);
try {
serverSocket.send(sendPacket);
} catch (IOException ex) {
Logger.getLogger(DispatcherReceiver.class.getName()).log(Level.SEVERE, null, ex);
}
i++;
}
}
public void run() throws SocketException {
DatagramSocket socket = null;
try {
socket = new DatagramSocket(53);
logger.info("Listening on DNS Port(53)");
int ECHOMAX = 2048;
DatagramPacket packet = new DatagramPacket(new byte[ECHOMAX], ECHOMAX);
while (true) {
try {
socket.receive(packet);
} catch (IOException e) {
e.printStackTrace();
}
byte[] data = packet.getData();
int length = packet.getLength();
byte[] d = new byte[length];
System.arraycopy(data, 0, d, 0, length);
byte[] response = parse(d);
DatagramPacket re =
new DatagramPacket(response, response.length, packet.getAddress(), packet.getPort());
re.setData(response);
socket.send(re);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
DatagramSocket socket = null;
try {
socket = new DatagramSocket(PORT);
while (true) {
DatagramPacket receivePacket = new DatagramPacket(new byte[256], 256);
socket.receive(receivePacket);
String date = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date());
byte[] sendData = date.getBytes(StandardCharsets.UTF_8);
DatagramPacket sendPacket =
new DatagramPacket(
sendData,
sendData.length,
new InetSocketAddress(receivePacket.getAddress(), receivePacket.getPort()));
socket.send(sendPacket);
}
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
if (socket != null && socket.isClosed() == false) {
socket.close();
}
}
}
public void run() {
while (moreQuotes) {
try {
byte[] buf = new byte[256];
// receive request
DatagramPacket packet = new DatagramPacket(buf, buf.length);
socket.receive(packet); // containing IP ecc.
// figure out response
String dString = null;
if (in == null) dString = new Date().toString();
else dString = getNextQuote();
buf = dString.getBytes();
// send the response to the client at "address" and "port"
InetAddress address = packet.getAddress();
int port = packet.getPort();
packet = new DatagramPacket(buf, buf.length, address, port);
socket.send(packet);
} catch (IOException e) {
e.printStackTrace();
moreQuotes = false;
}
}
socket.close();
}
public void run() {
try {
while (running) {
byte[] sendClientData = new byte[512];
byte[] sendServerData = new byte[512];
byte[] receiveClientData = new byte[512];
byte[] receiveServerData = new byte[512];
DatagramPacket receiveClientPacket = receivePacket(receiveClientData, receiveSocket);
receiveClientPacket.getLength();
// find port used by client
int clientPort = receiveClientPacket.getPort();
DatagramSocket hostSocket = new DatagramSocket();
sendServerData = receiveClientPacket.getData();
sendPacket(sendServerData, serverIPAddress, ServerPort, hostSocket);
DatagramPacket receiveServerPacket = receivePacket(receiveServerData, hostSocket);
if (receiveServerPacket.getData()[0] == 1) {
running = false;
}
sendClientData = receiveServerPacket.getData();
sendPacket(sendClientData, clientIPAddress, clientPort, hostSocket);
hostSocket.close();
}
receiveSocket.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public void run() {
System.out.println("ExeUDPServer开始监听..." + UDP_PORT);
DatagramSocket ds = null;
try {
ds = new DatagramSocket(UDP_PORT);
} catch (BindException e) {
System.out.println("UDP端口使用中...请重关闭程序启服务器");
} catch (SocketException e) {
e.printStackTrace();
}
while (ds != null) {
DatagramPacket dp = new DatagramPacket(buf, buf.length);
try {
ds.receive(dp);
// 得到把该数据包发来的端口和Ip
int rport = dp.getPort();
InetAddress addr = dp.getAddress();
String recvStr = new String(dp.getData(), 0, dp.getLength());
System.out.println("Server receive：" + recvStr + " from " + addr + " " + rport);
// 给客户端回应
String sendStr = "echo of " + recvStr;
byte[] sendBuf;
sendBuf = sendStr.getBytes();
DatagramPacket sendPacket = new DatagramPacket(sendBuf, sendBuf.length, addr, rport);
ds.send(sendPacket);
} catch (IOException e) {
e.printStackTrace();
}
}
}
public void run() {
boolean running = true;
DatagramPacket msg = new DatagramPacket(b, b.length);
logReader.debug("Reader running (Multicast=" + (sock instanceof MulticastSocket) + ").");
while (running) {
try {
sock.receive(msg);
if (debugFull) logReader.debug(":run: PtP datagram received. Size = " + msg.getLength());
if ((ignoreSource != null)
&& (ignoreSource.getPort() == msg.getPort())
&& (ignoreSource.getAddress().equals(msg.getAddress()))) {
if (debugFull) logReader.debug(":run: Ignored Last received message");
} else receiveFormatSend(msg);
} catch (SocketTimeoutException ste) {
// ste.printStackTrace();
} catch (IOException e) {
System.err.println("[UdpSimpleSession:reader:run] IOException: " + e.getMessage());
}
synchronized (this) {
if (terminate) running = false;
}
}
}
public static void main(String args[]) throws Exception {
String serverHostname = args[0];
int portNumber = Integer.parseInt(args[1]);
try {
BufferedReader inFromUser = new BufferedReader(new InputStreamReader(System.in));
DatagramSocket clientSocket = new DatagramSocket();
InetAddress IPAddress = InetAddress.getByName(serverHostname);
System.out.println("Attempting to connect to " + IPAddress + ") via UDP port " + portNumber);
System.out.println("Enter \"Quit\" to exit program");
while (true) {
byte[] sendData = new byte[1024];
byte[] receiveData = new byte[1024];
System.out.print("Enter Message: ");
String sentence = inFromUser.readLine();
if (sentence.equals("Quit")) break;
sendData = sentence.getBytes();
System.out.println("Sending data to " + sendData.length + " bytes to server.");
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, IPAddress, portNumber);
clientSocket.send(sendPacket);
DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length);
System.out.println("Waiting for return packet");
clientSocket.setSoTimeout(10000);
try {
clientSocket.receive(receivePacket);
String modifiedSentence = new String(receivePacket.getData());
InetAddress returnIPAddress = receivePacket.getAddress();
int port = receivePacket.getPort();
System.out.println("From server at: " + returnIPAddress + ":" + port);
System.out.println("Message: " + modifiedSentence);
} catch (SocketTimeoutException ste) {
System.out.println("Timeout Occurred: Packet assumed lost");
}
System.out.print("\n");
}
clientSocket.close();
} catch (UnknownHostException ex) {
System.err.println(ex);
} catch (IOException ex) {
System.err.println(ex);
}
}
