5 SMB Symbolic Constants

5.1 SMB Command Codes

The following values have been assigned for the SMB Commands.

 SMB_COM_CREATE_DIRECTORY              0x00 SMB_COM_DELETE_DIRECTORY              0x01 SMB_COM_OPEN                          0x02 SMB_COM_CREATE                        0x03 SMB_COM_CLOSE                         0x04 SMB_COM_FLUSH                         0x05 SMB_COM_DELETE                        0x06 SMB_COM_RENAME                        0x07 SMB_COM_QUERY_INFORMATION             0x08 SMB_COM_SET_INFORMATION               0x09 SMB_COM_READ                          0x0A SMB_COM_WRITE                         0x0B SMB_COM_LOCK_BYTE_RANGE               0x0C SMB_COM_UNLOCK_BYTE_RANGE             0x0D SMB_COM_CREATE_TEMPORARY              0x0E SMB_COM_CREATE_NEW                    0x0F SMB_COM_CHECK_DIRECTORY               0x10 SMB_COM_PROCESS_EXIT                  0x11 SMB_COM_SEEK                          0x12 SMB_COM_LOCK_AND_READ                 0x13 SMB_COM_WRITE_AND_UNLOCK              0x14 SMB_COM_READ_RAW                      0x1A SMB_COM_READ_MPX                      0x1B SMB_COM_READ_MPX_SECONDARY            0x1C SMB_COM_WRITE_RAW                     0x1D SMB_COM_WRITE_MPX                     0x1E SMB_COM_WRITE_MPX_SECONDARY           0x1F SMB_COM_WRITE_COMPLETE                0x20 SMB_COM_QUERY_SERVER                  0x21 SMB_COM_SET_INFORMATION2              0x22 SMB_COM_QUERY_INFORMATION2            0x23 SMB_COM_LOCKING_ANDX                  0x24 SMB_COM_TRANSACTION                   0x25 SMB_COM_TRANSACTION_SECONDARY         0x26 SMB_COM_IOCTL                         0x27 SMB_COM_IOCTL_SECONDARY               0x28 SMB_COM_COPY                          0x29 SMB_COM_MOVE                          0x2A SMB_COM_ECHO                          0x2B SMB_COM_WRITE_AND_CLOSE               0x2C SMB_COM_OPEN_ANDX                     0x2D SMB_COM_READ_ANDX                     0x2E SMB_COM_WRITE_ANDX                    0x2F SMB_COM_NEW_FILE_SIZE                 0x30 SMB_COM_CLOSE_AND_TREE_DISC           0x31 SMB_COM_TRANSACTION2                  0x32 SMB_COM_TRANSACTION2_SECONDARY        0x33 SMB_COM_FIND_CLOSE2                   0x34 SMB_COM_FIND_NOTIFY_CLOSE             0x35 /* Used by Xenix/Unix 0x60        0x6E */ SMB_COM_TREE_CONNECT                  0x70 SMB_COM_TREE_DISCONNECT               0x71 SMB_COM_NEGOTIATE                     0x72 SMB_COM_SESSION_SETUP_ANDX            0x73 SMB_COM_LOGOFF_ANDX                   0x74 SMB_COM_TREE_CONNECT_ANDX             0x75 SMB_COM_QUERY_INFORMATION_DISK        0x80 SMB_COM_SEARCH                        0x81 SMB_COM_FIND                          0x82 SMB_COM_FIND_UNIQUE                   0x83 SMB_COM_FIND_CLOSE                    0x84 SMB_COM_NT_TRANSACT                   0xA0 SMB_COM_NT_TRANSACT_SECONDARY         0xA1 SMB_COM_NT_CREATE_ANDX                0xA2 SMB_COM_NT_CANCEL                     0xA4 SMB_COM_NT_RENAME                    0xA5 SMB_COM_OPEN_PRINT_FILE               0xC0 SMB_COM_WRITE_PRINT_FILE              0xC1 SMB_COM_CLOSE_PRINT_FILE              0xC2 SMB_COM_GET_PRINT_QUEUE               0xC3 SMB_COM_READ_BULK                     0xD8 SMB_COM_WRITE_BULK                    0xD9 SMB_COM_WRITE_BULK_DATA               0xDA 

5.2 SMB_COM_TRANSACTION2 Subcommand codes

The subcommand code for SMB_COM_TRANSACTION2 request is placed in Setup[0]. The parameters associated with any particular request are placed in the Parameters vector of the request. The defined subcommand codes are:

Setup[0] Transaction2 Subcommand Code	Value	Meaning
TRANS2_OPEN2	0x00	Create file with extended attributes
TRANS2_FIND_FIRST2	0x01	Begin search for files
TRANS2_FIND_NEXT2	0x02	Resume search for files
TRANS2_QUERY_FS_INFORMATION	0x03	Get file system information
	0x04	Reserved (TRANS_SET_FS_INFORMATION?)
TRANS2_QUERY_PATH_INFORMATION	0x05	Get information about a named file or directory
TRANS2_SET_PATH_INFORMATION	0x06	Set information about a named file or directory
TRANS2_QUERY_FILE_INFORMATION	0x07	Get information about a handle
TRANS2_SET_FILE_INFORMATION	0x08	Set information by handle
TRANS2_FSCTL	0x09	Not implemented by NT server
TRANS2_IOCTL2	0x0A	Not implemented by NT server
TRANS2_FIND_NOTIFY_FIRST	0x0B	Not implemented by NT server
TRANS2_FIND_NOTIFY_NEXT	0x0C	Not implemented by NT server
TRANS2_CREATE_DIRECTORY	Ox0D	Create directory with extended attributes
TRANS2_SESSION_SETUP	0x0E	Session setup with extended security information
TRANS2_GET_DFS_REFERRAL	0x10	Get a DFS referral
TRANS2_REPORT_DFS_INCONSISTENCY	0x11	Report a DFS knowledge inconsistency

5.3 SMB_COM_NT_TRANSACTION Subcommand Codes

For these transactions, Function in the primary client request indicates the operation to be performed. It may assume one of the following values:

Transaction Subcommand Code	Value	Meaning
NT_TRANSACT_CREATE	1	File open /create
NT_TRANSACT_IOCTL	2	Device IOCTL
NT_TRANSACT_SET_SECURITY_DESC	3	Set security descriptor
NT_TRANSACT_NOTIFY_CHANGE	4	Start directory watch
NT_TRANSACT_RENAME	5	Reserved (Handle-based rename)
NT_TRANSACT_QUERY_SECURITY_DESC	6	Retrieve security descriptor info

5.4 SMB Protocol Dialect Constants

This is the list of CIFS protocol dialects, ordered from least functional (earliest) version to most functional (most recent) version:

Dialect Name	Comment
PC NETWORK PROGRAM 1.0	The original MSNET SMB protocol ( otherwise known as the " core protocol")
PCLAN1.0	Some versions of the original MSNET defined this as an alternate to the core protocol name
MICROSOFT NETWORKS 1.03	This is used for the MS-NET 1.03 product. It defines Lock&Read,Write&Unlock, and a special version of raw read and raw write.
MICROSOFT NETWORKS 3.0	This is the DOS LANMAN 1.0 specific protocol. It is equivalent to the LANMAN 1.0 protocol, except the server is required to map errors from the OS/2 error to an appropriate DOS error.
LANMAN1.0	This is the first version of the full LANMAN 1.0 protocol
Windows for Workgroups 3.1a	Windows for Workgroups Version 1.0 (similar to LANMAN1.0 dialect)
LM1.2X002	This is the first version of the full LANMAN 2.0 protocol
DOS LM1.2X002	This is the DOS equivalent of the LM1.2X002 protocol. It is identical to the LM1.2X002 protocol, but the server will perform error mapping to appropriate DOS errors. See section 6.0
DOS LANMAN2.1	DOS LANMAN2.1
LANMAN2.1	OS/2 LANMAN2.1
NT LM 0.12	The SMB protocol designed for NT networking. This has special SMBs which duplicate the NT semantics.

CIFS servers select the most recent version of the protocol known to both client and server. Any CIFS server, which supports dialects newer than the original core dialect, must support all the messages and semantics of the dialects between the core dialect and the newer one. This is to say that a server, which supports the NT LM 0.12 dialect, must also support all of the messages of the previous 10 dialects. It is the client's responsibility to ensure it only sends SMBs, which are appropriate to the dialect negotiated. Clients must be prepared to receive an SMB response from an earlier protocol dialect -- even if the client used the most recent form of the request.