示例#1
0
 /**
  * <em> Note that the byte[] buffer passed as argument must not be modified. Reason: if we
  * retransmit the message, it would still have a ref to the original byte[] buffer passed in as
  * argument, and so we would retransmit a changed byte[] buffer ! </em>
  */
 public final void setBuffer(Buffer buf) {
   if (buf != null) {
     this.buf = buf.getBuf();
     this.offset = buf.getOffset();
     this.length = buf.getLength();
   }
 }
示例#2
0
 private static void _testMessage(Message msg) throws Exception {
   Buffer buf = Util.messageToByteBuffer(msg);
   Message msg2 = Util.byteBufferToMessage(buf.getBuf(), buf.getOffset(), buf.getLength());
   Assert.assertEquals(msg.getSrc(), msg2.getSrc());
   Assert.assertEquals(msg.getDest(), msg2.getDest());
   Assert.assertEquals(msg.getLength(), msg2.getLength());
 }
示例#3
0
    public void run() {
      Throwable t = null;
      while (canRun()) {
        Buffer data = null;
        try {
          data = send_queue.take();
          if (data.hashCode() == termination.hashCode()) break;
        } catch (InterruptedException e) {
          t = e;
          break;
        }

        if (data != null) {
          try {
            _send(data.getBuf(), 0, data.getLength(), false, send_queue.isEmpty());
          } catch (Throwable ignored) {
            t = ignored;
          }
        }
      }
      server.notifyConnectionClosed(
          TcpConnection.this,
          String.format(
              "%s: %s", getClass().getSimpleName(), t != null ? t.toString() : "normal stop"));
    }
示例#4
0
  private void encryptAndSend(Message msg) throws Exception {
    EncryptHeader hdr = new EncryptHeader(EncryptHeader.ENCRYPT, getSymVersion());
    if (this.encrypt_entire_message) hdr.type |= EncryptHeader.ENCRYPT_ENTIRE_MSG;

    if (encrypt_entire_message) {
      if (msg.getSrc() == null) msg.setSrc(local_addr);

      Buffer serialized_msg = Util.streamableToBuffer(msg);
      byte[] encrypted_msg =
          code(
              serialized_msg.getBuf(),
              serialized_msg.getOffset(),
              serialized_msg.getLength(),
              false);

      // exclude existing headers, they will be seen again when we decrypt and unmarshal the msg at
      // the receiver
      Message tmp = msg.copy(false, false).setBuffer(encrypted_msg).putHeader(this.id, hdr);
      down_prot.down(new Event(Event.MSG, tmp));
      return;
    }

    // copy neeeded because same message (object) may be retransmitted -> no double encryption
    Message msgEncrypted =
        msg.copy(false)
            .putHeader(this.id, hdr)
            .setBuffer(code(msg.getRawBuffer(), msg.getOffset(), msg.getLength(), false));
    down_prot.down(new Event(Event.MSG, msgEncrypted));
  }
示例#5
0
    public void run() {

      for (int i = 1; i <= number_of_msgs; i++) {
        try {
          Message msg = new Message(null, buf);
          if (oob) msg.setFlag(Message.Flag.OOB);
          if (dont_bundle) msg.setFlag(Message.Flag.DONT_BUNDLE);
          if (i > 0 && do_print > 0 && i % do_print == 0) System.out.println("-- sent " + i);

          Buffer buffer = writeMessage(msg);

          output_lock.lock(); // need to sync if we have more than 1 sender
          try {
            // msg.writeTo(output);
            output.writeInt(buffer.getLength());
            output.write(buffer.getBuf(), buffer.getOffset(), buffer.getLength());
            // output.flush();
          } finally {
            output_lock.unlock();
          }
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }
示例#6
0
 /**
  * <em> Note that the byte[] buffer passed as argument must not be modified. Reason: if we
  * retransmit the message, it would still have a ref to the original byte[] buffer passed in as
  * argument, and so we would retransmit a changed byte[] buffer ! </em>
  */
 public final Message setBuffer(Buffer buf) {
   if (buf != null) {
     this.buf = buf.getBuf();
     this.offset = buf.getOffset();
     this.length = buf.getLength();
   }
   return this;
 }
示例#7
0
  void sendMessages() throws Exception {
    if (num_threads > 1 && num_msgs % num_threads != 0) {
      System.err.println(
          "num_msgs (" + num_msgs + " ) has to be divisible by num_threads (" + num_threads + ")");
      return;
    }

    System.out.println(
        "sending "
            + num_msgs
            + " messages ("
            + Util.printBytes(msg_size)
            + ") to "
            + remote
            + ": oob="
            + oob
            + ", "
            + num_threads
            + " sender thread(s)");
    ByteBuffer buf =
        ByteBuffer.allocate(Global.BYTE_SIZE + Global.LONG_SIZE).put(START).putLong(num_msgs);
    Message msg = new Message(null, buf.array());
    // msg.writeTo(output);

    ExposedByteArrayOutputStream out_stream = new ExposedByteArrayOutputStream((int) (msg.size()));
    ExposedDataOutputStream dos = new ExposedDataOutputStream(out_stream);
    byte flags = 0;
    dos.writeShort(Version.version); // write the version
    if (msg.getDest() == null) flags += (byte) 2;
    dos.writeByte(flags);
    msg.writeTo(dos);
    Buffer buffer = new Buffer(out_stream.getRawBuffer(), 0, out_stream.size());

    output_lock.lock(); // need to sync if we have more than 1 sender
    try {
      // msg.writeTo(output);
      output.writeInt(buffer.getLength());
      output.write(buffer.getBuf(), buffer.getOffset(), buffer.getLength());
    } finally {
      output_lock.unlock();
    }

    int msgs_per_sender = num_msgs / num_threads;
    Sender[] senders = new Sender[num_threads];
    for (int i = 0; i < senders.length; i++)
      senders[i] = new Sender(msgs_per_sender, msg_size, num_msgs / 10);
    for (Sender sender : senders) sender.start();
    for (Sender sender : senders) sender.join();
    output.flush();
    System.out.println("done sending " + num_msgs + " to " + remote);
  }
示例#8
0
  void sendMcastDiscoveryRequest(Message msg) {
    Buffer buf;
    DatagramPacket packet;
    DataOutputStream out = null;

    try {
      if (msg.getSrc() == null) msg.setSrc(local_addr);
      ExposedByteArrayOutputStream out_stream = new ExposedByteArrayOutputStream(128);
      out = new DataOutputStream(out_stream);
      msg.writeTo(out);
      out.flush(); // flushes contents to out_stream
      buf = new Buffer(out_stream.getRawBuffer(), 0, out_stream.size());
      packet =
          new DatagramPacket(
              buf.getBuf(), buf.getOffset(), buf.getLength(), mcast_addr, mcast_port);
      discovery_reception.reset();
      if (mcast_send_sockets != null) {
        MulticastSocket s;
        for (int i = 0; i < mcast_send_sockets.length; i++) {
          s = mcast_send_sockets[i];
          try {
            s.send(packet);
          } catch (Exception e) {
            log.error("failed sending packet on socket " + s);
          }
        }
      } else { // DEFAULT path
        if (mcast_sock != null) mcast_sock.send(packet);
      }
      waitForDiscoveryRequestReception();
    } catch (IOException ex) {
      log.error("failed sending discovery request", ex);
    } finally {
      Util.close(out);
    }
  }