Beispiel #1
0
  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) {
      }
    }
  }
Beispiel #2
0
  void closeSocket() {
    if (sock != null) {
      // by sending a dummy packet, the thread will terminate (if it was flagged as stopped before)
      sendDummyPacket(sock.getLocalAddress(), sock.getLocalPort());

      sock.close();
      sock = null;
      if (Trace.trace) {
        Trace.info("UDP.closeSocket()", "socket closed");
      }
    }
  }
 /**
  * The method queries a Stun server for a binding for the port and address that <tt>sock</tt> is
  * bound on.
  *
  * @param sock the socket whose port and address we'dlike to resolve (the stun message gets sent
  *     trhough that socket)
  * @return StunAddress the address returned by the stun server or null if an error occurred or no
  *     address was returned
  * @throws IOException if an error occurs while stun4j is using sockets.
  * @throws BindException if the port is already in use.
  */
 private StunAddress queryStunServer(DatagramSocket sock) throws IOException, BindException {
   StunAddress mappedAddress = null;
   if (detector != null && useStun) {
     mappedAddress = detector.getMappingFor(sock);
     if (logger.isTraceEnabled()) {
       logger.trace(
           "For socket with address "
               + sock.getLocalAddress().getHostAddress()
               + " and port "
               + sock.getLocalPort()
               + " the stun server returned the "
               + "following mapping ["
               + mappedAddress
               + "]");
     }
   }
   return mappedAddress;
 }
  /**
   * 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;
  }
Beispiel #5
0
  String dumpSocketInfo() throws Exception {
    StringBuffer sb = new StringBuffer();
    sb.append("local_addr=").append(local_addr);
    sb.append(", mcast_addr=").append(mcast_addr);
    sb.append(", bind_addr=").append(bind_addr);
    sb.append(", ttl=").append(ip_ttl);

    if (sock != null) {
      sb.append("\nsocket: bound to ");
      sb.append(sock.getLocalAddress().getHostAddress()).append(":").append(sock.getLocalPort());
      sb.append(", receive buffer size=").append(sock.getReceiveBufferSize());
      sb.append(", send buffer size=").append(sock.getSendBufferSize());
    }

    if (mcast_sock != null) {
      sb.append("\nmulticast socket: bound to ");
      sb.append(mcast_sock.getInterface().getHostAddress())
          .append(":")
          .append(mcast_sock.getLocalPort());
      sb.append(", send buffer size=").append(mcast_sock.getSendBufferSize());
      sb.append(", receive buffer size=").append(mcast_sock.getReceiveBufferSize());
    }
    return sb.toString();
  }
  /**
   * Log the packet.
   *
   * @param packet packet to log
   */
  @Override
  protected void doLogPacket(RawPacket packet, InetSocketAddress target) {
    if (socket == null || packet == null || target == null) return;

    // Do not log the packet if it has been processed (and already
    // logged) by the ice4j stack.
    if (socket instanceof MultiplexingDatagramSocket) return;

    PacketLoggingService pktLogging = getPacketLoggingService();

    if (pktLogging != null) {
      pktLogging.logPacket(
          PacketLoggingService.ProtocolName.RTP,
          socket.getLocalAddress().getAddress(),
          socket.getLocalPort(),
          target.getAddress().getAddress(),
          target.getPort(),
          PacketLoggingService.TransportName.UDP,
          true,
          packet.getBuffer(),
          packet.getOffset(),
          packet.getLength());
    }
  }
Beispiel #7
0
  /**
   * Create UDP sender and receiver sockets. Currently there are 2 sockets (sending and receiving).
   * This is due to Linux's non-BSD compatibility in the JDK port (see DESIGN).
   */
  void createSockets() throws Exception {
    InetAddress tmp_addr = null;

    // bind_addr not set, try to assign one by default. This is needed on Windows

    // changed by bela Feb 12 2003: by default multicast sockets will be bound to all network
    // interfaces

    // CHANGED *BACK* by bela March 13 2003: binding to all interfaces did not result in a correct
    // local_addr. As a matter of fact, comparison between e.g. 0.0.0.0:1234 (on hostA) and
    // 0.0.0.0:1.2.3.4 (on hostB) would fail !
    if (bind_addr == null) {
      InetAddress[] interfaces =
          InetAddress.getAllByName(InetAddress.getLocalHost().getHostAddress());
      if (interfaces != null && interfaces.length > 0) bind_addr = interfaces[0];
    }

    if (bind_addr == null) bind_addr = InetAddress.getLocalHost();

    if (bind_addr != null && Trace.trace) {
      Trace.info(
          "UDP.createSockets()",
          "unicast sockets will use interface " + bind_addr.getHostAddress());

      // 2. Create socket for receiving unicast UDP packets. The address and port
      //    of this socket will be our local address (local_addr)

      // 27-6-2003 bgooren, find available port in range (start_port, start_port+port_range)
    }
    int rcv_port = bind_port, max_port = bind_port + port_range;
    while (rcv_port <= max_port) {

      try {
        sock = new DatagramSocket(rcv_port, bind_addr);
        break;
      } catch (SocketException bind_ex) { // Cannot listen on this port
        rcv_port++;
      } catch (SecurityException sec_ex) { // Not allowed to list on this port
        rcv_port++;
      }

      // Cannot listen at all, throw an Exception
      if (rcv_port == max_port + 1) { // +1 due to the increment above
        throw new Exception(
            "UDP.createSockets(): cannot list on any port in range "
                + bind_port
                + "-"
                + (bind_port + port_range));
      }
    }
    // ucast_recv_sock=new DatagramSocket(bind_port, bind_addr);
    if (sock == null) {
      throw new Exception("UDP.createSocket(): sock is null");
    }

    local_addr = new IpAddress(sock.getLocalAddress(), sock.getLocalPort());
    if (additional_data != null) {
      local_addr.setAdditionalData(additional_data);

      // 3. Create socket for receiving IP multicast packets
    }
    if (ip_mcast) {
      mcast_sock = new MulticastSocket(mcast_port);
      mcast_sock.setTimeToLive(ip_ttl);
      if (bind_addr != null) {
        mcast_sock.setInterface(bind_addr);
      }
      tmp_addr = InetAddress.getByName(mcast_addr_name);
      mcast_addr = new IpAddress(tmp_addr, mcast_port);
      mcast_sock.joinGroup(tmp_addr);
    }

    setBufferSizes();

    if (Trace.trace) {
      Trace.info("UDP.createSockets()", "socket information:\n" + dumpSocketInfo());
    }
  }
Beispiel #8
-1
 public UDPEcho(String host, int port) throws IOException, UnknownHostException {
   this.hostIP = InetAddress.getByName(host);
   this.port = port;
   sock = new DatagramSocket();
   System.out.println("UDP: " + sock.getLocalAddress() + ":" + sock.getLocalPort());
   // sock.connect(hostIP,port);
 }