+----------------+----------------+----------------+----------------+
    |major  | minor  |                |                |                |
    |version| version|      type      |     seq_no     |   flags        |
    +----------------+----------------+----------------+----------------+
    |                                                                   |
    |                            session_id                             |
    +----------------+----------------+----------------+----------------+
    |                                                                   |
    |                              length                               |
    +----------------+----------------+----------------+----------------+

snprintf(buffer, sizeof(buffer), "%x%x%x%x%x",version,version,type,seq,flags,session_id,length);

send(socket,buffer,sizeof(buffer),0);