2.2.4.53.2 Response

 SMB_Parameters
   {
   UCHAR  WordCount;
   Words
     {
     UCHAR  AndXCommand;
     UCHAR  AndXReserved;
     USHORT AndXOffset;
     USHORT Action;
     }
   }
 SMB_Data
   {
   USHORT ByteCount;
   Bytes
     {
     UCHAR      Pad[];
     SMB_STRING NativeOS[];
     SMB_STRING NativeLanMan[];
     SMB_STRING PrimaryDomain[];
     }
   }

SMB_Header:

UID (2 bytes): The UID returned in the response to a successful SMB_COM_SESSION_SETUP_ANDX request represents an authenticated session.

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SMB_Parameters
...																								SMB_Data (variable)
...

SMB_Parameters (7 bytes):

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WordCount								Words
...

WordCount (1 byte): The value of this field MUST be 0x03.

Words (6 bytes):

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AndXCommand								AndXReserved								AndXOffset
Action

AndXCommand (1 byte): The command code for the next SMB command in the packet. This value MUST be set to 0xFF if there are no additional SMB command responses in the server response packet.

AndXReserved (1 byte): A reserved field. This MUST be set to 0x00 when this response is sent, and the client MUST ignore this field.

AndXOffset (2 bytes): This field MUST be set to the offset in bytes from the start of the SMB Header (section 2.2.3.1) to the start of the WordCount field in the next SMB command response in this packet. This field is valid only if the AndXCommand field is not set to 0xFF. If AndXCommand is 0xFF, this field MUST be ignored by the client.

Action (2 bytes): A 16-bit field. The two lowest-order bits have been defined:

Name and Bitmask	Meaning
SMB_SETUP_GUEST 0x0001	If clear (0), the user successfully authenticated and is logged in. if set (1), authentication failed but the server has granted guest access. The user is logged in as Guest.
SMB_SETUP_USE_LANMAN_KEY 0x0002	If clear, the NTLM user session key will be used for message signing (if enabled). If set, the LM session key will be used for message signing.

SMB_Data (variable):

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ByteCount																Bytes (variable)
...

ByteCount (2 bytes): The sum of the lengths, in bytes, of the Pad, NativeOS, NativeLanMan, and PrimaryDomain fields.

Bytes (variable):

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Pad (variable)
...
NativeOS (variable)
...
NativeLanMan (variable)
...
PrimaryDomain (variable)
...

Pad (variable): Padding bytes. If Unicode support has been enabled, this field MUST contain zero or one null padding byte as needed to ensure that the NativeOS field, which follows, is aligned on a 16-bit boundary.

NativeOS (variable): A string that represents the native operating system of the server. If SMB_FLAGS2_UNICODE is set in the Flags2 field of the SMB header of the response, the string MUST be a null-terminated array of 16-bit Unicode characters. Otherwise, the string MUST be a null-terminated array of OEM characters. If the string consists of Unicode characters, this field MUST be aligned to start on a 2-byte boundary from the start of the SMB header.<102>

NativeLanMan (variable): A string that represents the native LAN Manager type of the server. If SMB_FLAGS2_UNICODE is set in the Flags2 field of the SMB header of the response, the string MUST be a null-terminated array of 16-bit Unicode characters. Otherwise, the string MUST be a null-terminated array of OEM characters. If the string consists of Unicode characters, this field MUST be aligned to start on a 2-byte boundary from the start of the SMB header.<103>

PrimaryDomain (variable): A string representing the primary domain or workgroup name of the server. If SMB_FLAGS2_UNICODE is set in the Flags2 field of the SMB header of the response, the string MUST be a null-terminated array of 16-bit Unicode characters. Otherwise, the string MUST be a null-terminated array of OEM characters. If the string consists of Unicode characters, this field MUST be aligned to start on a 2-byte boundary from the start of the SMB header.<104><105>

Error Codes

SMB error class	SMB error code	NT status code	POSIX equivalent	Description
ERRDOS (0x01)	ERRnoaccess (0x0005)	STATUS_LOGON_FAILURE (0xC000006D)	EPERM	Authentication failure.
ERRSRV (0x02)	ERRerror (0x0001)	STATUS_INVALID_SMB (0x00010002)		A corrupt or invalid SMB request was received.
ERRSRV (0x02)	ERRnomem (0x0008)	STATUS_INSUFF_SERVER_RESOURCES (0xC0000205)	ENOMEM	The server is out of resources.
ERRSRV (0x02)	ERRtoomanyuids (0x005A)	STATUS_TOO_MANY_SESSIONS (0xC00000CE)		The maximum number of active UIDs per SMB connection has been reached.