3.2.5.8 Receiving an SMB_COM_WRITE_ANDX Response
The processing of an SMB_COM_WRITE_ANDX response is handled as specified in [MS-CIFS] section 3.2.5.27 with the following additions:
The 16-bit SMB_Parameters.Words.Reserved field, specified in [MS-CIFS] section 2.2.4.43.2, is now interpreted as a 16-bit CountHigh field followed by an 8-bit Reserved field. The CountHigh field MUST contain the two most-significant bytes of a 32-bit count of bytes written by the server.