def _read_ip_hextet(self):
_htet = self._read_fileng(<NUM_LIT:4>).hex()<EOL>_vers = _htet[<NUM_LIT:0>]                    <EOL>_tcls = int(_htet[<NUM_LIT:0>:<NUM_LIT:2>], base=<NUM_LIT:16>)    <EOL>_flow = int(_htet[<NUM_LIT:2>:], base=<NUM_LIT:16>)     <EOL>return (_vers, _tcls, _flow)<EOL>
Read first four hextets of IPv6.