Esempio n. 1
0
  /*
   * Connect a UDP socket, disconnect it, then send and recv on it.
   * It will fail on Linux if we don't silently bind(2) again at the
   * end of DatagramSocket.disconnect().
   */
  private static void testConnectedUDP(InetAddress addr) throws Exception {
    try {
      DatagramSocket s = new DatagramSocket(0, addr);
      DatagramSocket ss = new DatagramSocket(0, addr);
      System.out.print("\tconnect...");
      s.connect(ss.getLocalAddress(), ss.getLocalPort());
      System.out.print("disconnect...");
      s.disconnect();

      byte[] data = {0, 1, 2};
      DatagramPacket p =
          new DatagramPacket(data, data.length, s.getLocalAddress(), s.getLocalPort());
      s.setSoTimeout(10000);
      System.out.print("send...");
      s.send(p);
      System.out.print("recv...");
      s.receive(p);
      System.out.println("OK");

      ss.close();
      s.close();
    } catch (Exception e) {
      e.printStackTrace();
      throw e;
    }
  }
Esempio n. 2
0
 public void FlushConnection() {
   try {
     socket.disconnect();
   } catch (Exception e) {
     e.printStackTrace();
   }
 }
Esempio n. 3
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  // 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
  }
Esempio n. 4
0
 /**
  * Forces the instant sending of a packet, ignoring the present packet queue.
  *
  * @param packet
  */
 public void forceInstantSend(DatagramPacket packet) {
   if (m_socket.isConnected() == true && !interrupted()) {
     try {
       m_socket.send(packet);
       m_packetsSent++;
     } catch (Exception e) {
       m_socket.disconnect();
     }
   }
 }
Esempio n. 5
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 /** stop the UDP server, clean up and delete its reference. */
 public void dispose() {
   isRunning = false;
   _myThread = null;
   if (_myDatagramSocket != null) {
     if (_myDatagramSocket.isConnected()) {
       Logger.printDebug("UdpServer.dispose()", "disconnect()");
       _myDatagramSocket.disconnect();
     }
     Logger.printDebug("UdpServer.dispose()", "close()");
     _myDatagramSocket.close();
     _myDatagramSocket = null;
     Logger.printDebug("UdpServer.dispose()", "Closing unicast datagram socket.");
   }
 }
Esempio n. 6
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 /**
  * A synchronized function for closing the UPD socket. It prevents the situation in which both the
  * listener thread and the GUI thread close the socket at the same time.
  */
 private synchronized void closeSocket() {
   if (ds != null) {
     if (ds.isConnected()) {
       ds.disconnect();
     }
     if (!ds.isClosed()) {
       ds.close();
     }
     ds = null;
     if (Debug.SHOW_PROXY_VEHICLE_DEBUG_MSG) {
       System.err.println("The UDP socket is closed.");
     }
   }
 }
  /**
   * Disconnects from Avatar.
   *
   * @throws IOException if the connection to Avatar could not be disconnected.
   */
  private void disconnect() throws IOException {
    // Do nothing if we are already disconnected
    if (socket == null) {
      return;
    }

    // disconnect.
    try {
      feedback.interrupt();
      feedback = null;
      socket.disconnect();
      socket.close();
    } finally {
      socket = null;
      feedback = null;
    }
    LOGGER.info("diconnected from Avatar");
  }
  /**
   * Returns an InetAddress instance that represents the localhost, and that a socket can bind upon
   * or distribute to peers as a contact address.
   *
   * @param intendedDestination the destination that we'd like to use the localhost address with.
   * @return an InetAddress instance representing the local host, and that a socket can bind upon or
   *     distribute to peers as a contact address.
   */
  public synchronized InetAddress getLocalHost(InetAddress intendedDestination) {
    // no point in making sure that the localHostFinderSocket is initialized.
    // better let it through a NullPointerException.
    InetAddress localHost = null;
    localHostFinderSocket.connect(intendedDestination, this.RANDOM_ADDR_DISC_PORT);
    localHost = localHostFinderSocket.getLocalAddress();
    localHostFinderSocket.disconnect();
    // windows socket implementations return the any address so we need to
    // find something else here ... InetAddress.getLocalHost seems to work
    // better on windows so lets hope it'll do the trick.
    if (localHost.isAnyLocalAddress()) {
      try {
        // all that's inside the if is an ugly IPv6 hack
        // (good ol' IPv6 - always causing more problems than it solves.)
        if (intendedDestination instanceof Inet6Address) {
          // return the first globally routable ipv6 address we find
          // on the machine (and hope it's a good one)
          Enumeration interfaces = NetworkInterface.getNetworkInterfaces();

          while (interfaces.hasMoreElements()) {
            NetworkInterface iface = (NetworkInterface) interfaces.nextElement();
            Enumeration addresses = iface.getInetAddresses();
            while (addresses.hasMoreElements()) {
              InetAddress address = (InetAddress) addresses.nextElement();
              if (address instanceof Inet6Address) {
                if (!address.isAnyLocalAddress()
                    && !address.isLinkLocalAddress()
                    && !address.isSiteLocalAddress()
                    && !address.isLoopbackAddress()) {
                  return address;
                }
              }
            }
          }
        } else localHost = InetAddress.getLocalHost();
        /** @todo test on windows for ipv6 cases */
      } catch (Exception ex) {
        // sigh ... ok return 0.0.0.0
        logger.warn("Failed to get localhost ", ex);
      }
    }

    return localHost;
  }
Esempio n. 9
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  /** Checks the queue for packets waiting to be sent, and sends any that are in waiting. */
  public void run() {
    while (m_socket.isConnected() == true && !interrupted()) {
      try {
        if (m_highPriorityPackets.isEmpty() == false) {
          m_socket.send(m_highPriorityPackets.remove(0));
          m_packetsSent++;
          Thread.sleep(1);
        } else if (m_packets.isEmpty() == false) {
          m_socket.send(m_packets.remove(0));
          m_packetsSent++;
          Thread.sleep(2);
        } else {
          Thread.sleep(5);
        }

      } catch (Exception e) {
        m_socket.disconnect();
      }
    }
  }
 public void closeSocket() { // s4s: add by snmp4sdn, because in junit test, occurs
   // "java.net.BindException: Address already in use: Cannot bind"
   if (dSocket == null) return;
   if (dSocket.isConnected()) dSocket.disconnect();
   dSocket.close();
 }
 @Override
 public void disconnect() {
   clientSide.disconnect();
   getCallback().onDisconnect();
 }