public boolean handleMessage() throws java.io.IOException {
      ByteBuffer buf = ByteBuffer.allocate(4);
      int nBytes = ChannelUtil.fillBuffer(buf, agentSocket);
      if (nBytes == 0) {
        Log.info("DomainServer: agent closed connection " + agentSocket);
        return false;
      }
      if (nBytes < 4) {
        Log.error("DomainServer: invalid message " + nBytes);
        return false;
      }

      int msgLen = buf.getInt();
      if (msgLen < 0) {
        return false;
      }

      MVByteBuffer buffer = new MVByteBuffer(msgLen);
      nBytes = ChannelUtil.fillBuffer(buffer.getNioBuf(), agentSocket);
      if (nBytes == 0) {
        Log.info("DomainServer: agent closed connection " + agentSocket);
        return false;
      }
      if (nBytes < msgLen) {
        Log.error(
            "DomainServer: invalid message, expecting "
                + msgLen
                + " got "
                + nBytes
                + " from "
                + agentSocket);
        return false;
      }

      Message message = (Message) MarshallingRuntime.unmarshalObject(buffer);

      if (message instanceof AgentHelloMessage) {
        // Successfully added agent, clear our socket var
        // so we don't close it.
        if (handleAgentHello((AgentHelloMessage) message)) agentSocket = null;
        return false;
      } else if (message instanceof AllocNameMessage)
        handleAllocName((AllocNameMessage) message, agentSocket);

      return true;
    }
  /** make sure the packet as the remote address and remote port set */
  static void sendPacket(DatagramChannel dc, RDPPacket packet) {

    sendMeter.add();

    // allocate a buffer
    int bufSize = 100 + (packet.numEacks() * 4);
    if (packet.getData() != null) {
      bufSize += packet.getData().length;
      sendDataMeter.add();
    }
    MVByteBuffer buf = new MVByteBuffer(bufSize);
    packet.toByteBuffer(buf); // function flips the buffer

    int remotePort = packet.getPort();
    InetAddress remoteAddr = packet.getInetAddress();

    if ((remotePort < 0) || (remoteAddr == null)) {
      throw new MVRuntimeException("RDPServer.sendPacket: remotePort or addr is null");
    }

    try {
      int bytes = dc.send(buf.getNioBuf(), new InetSocketAddress(remoteAddr, remotePort));
      if (bytes == 0) {
        Log.error("RDPServer.sendPacket: could not send packet, size=" + bufSize);
      }

      if (Log.loggingNet)
        Log.net(
            "RDPServer.sendPacket: remoteAddr="
                + remoteAddr
                + ", remotePort="
                + remotePort
                + ", numbytes sent="
                + bytes);
    } catch (java.io.IOException e) {
      Log.exception(
          "RDPServer.sendPacket: remoteAddr="
              + remoteAddr
              + ", remotePort="
              + remotePort
              + ", got exception",
          e);
      throw new MVRuntimeException("RDPServer.sendPacket", e);
    }
  }