1.8 Vendor-Extensible Fields

This protocol uses NTSTATUS values as defined in [MS-ERREF] section 2.3. Vendors are free to choose their own values for this field, as long as the C bit (0x20000000) is set, indicating that it is a customer code.

SMB command codes listed as Reserved or Unused can be defined in future versions of CIFS or new SMB dialects, and thus MUST NOT be used in any CIFS implementation. Similarly, fields (including bit fields) that are marked Reserved MUST NOT be used. Undefined transaction sub-command codes and undefined Information Level values are reserved for future use.