private void encodeCommand(@Nonnull AbstractCommand cmd) throws IOException {
if (cmd.getId() != CommandList.CMD_KEEPALIVE) {
log.debug("SND: {}", cmd);
}
buffer.clear();
buffer.put((byte) cmd.getId());
buffer.put((byte) (cmd.getId() ^ COMMAND_XOR_MASK));
// keep some space for the length and the CRC
int headerLenCRC = buffer.position();
buffer.putShort((short) 0);
buffer.putShort((short) 0);
int startOfCmd = buffer.position();
// encode command into net protocol
cmd.encode(this);
int length = buffer.position() - startOfCmd;
buffer.flip();
buffer.position(startOfCmd);
int crc = NetComm.getCRC(buffer, length);
buffer.position(headerLenCRC);
buffer.putShort((short) length);
buffer.putShort((short) crc);
buffer.position(0);
if (NetComm.isDumpingActive()) {
NetComm.dump("snd => ", buffer);
buffer.flip();
}
outChannel.write(buffer);
}