184.108.40.206.6 Handling Incorrectly Formatted Requests
If the server receives a request that does not conform to the structures outlined in section 2, the server MUST fail the request, as specified in section 220.127.116.11, with the error code STATUS_INVALID_PARAMETER. The server MAY<205> also disconnect the connection.
The server MUST disconnect, as specified in section 18.104.22.168, without sending an error response if any of the following are true:
The ProtocolId field in the SMB2 header is not equal to 0xFE, 'S', 'M', and 'B' (in network order).
The Command code in the SMB2 header does not match one of the command codes in the SMB2 header as specified in section 2.2.1.
The server receives a request with a length less than the length of the SMB2 header as specified in section 2.2.1.