2.2.4.19.1 Request

 SMB_Parameters
   {
   UCHAR  WordCount;
   Words
     {
     USHORT FID;
     USHORT Mode;
     LONG   Offset;
     }
   }
 SMB_Data
   {
   USHORT ByteCount;
   }
            

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SMB_Parameters
...
...								SMB_Data

SMB_Parameters (9 bytes):

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WordCount								Words
...
...

WordCount (1 byte): This field MUST be 0x0004.

Words (8 bytes):

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FID																Mode
Offset

FID (2 bytes): The File ID of the open file within which to seek.

Mode (2 bytes): The seek mode. Possible values are as follows.

Value	Meaning
0x0000	Seek from the start of the file.
0x0001	Seek from the current position.
0x0002	Seek from the end of the file.

The "current position" is the offset specified in a previous seek request, or the offset plus data length specified in a previous read or write request, whichever is most recent. The next successful read, write, or seek command changes the position of the file pointer.

Offset (4 bytes): A 32-bit signed long value indicating the file position, relative to the position indicated in Mode, to which to set the updated file pointer. The value of Offset ranges from -2 gigabytes to +2 gigabytes ((-2**31) to (2**31 -1) bytes).<30>

SMB_Data (2 bytes):

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ByteCount

ByteCount (2 bytes): This field MUST be 0x0000. No data is sent by this message.