2.2.4.50.1 Request

 SMB_Parameters
   {
   UCHAR  WordCount;
   }
 SMB_Data
   {
   USHORT ByteCount;
   Bytes
     {
     UCHAR      BufferFormat1;
     OEM_STRING Path;
     UCHAR      BufferFormat2;
     OEM_STRING Password;
     UCHAR      BufferFormat3;
     OEM_STRING Service;
     }
   }

SMB_Header

Flags2 (2 bytes): The SMB_FLAGS2_UNICODE flag bit SHOULD be zero. Servers MUST ignore the SMB_FLAGS2_UNICODE flag and interpret strings in this request as OEM_STRING strings.<74>

TID (2 bytes): This field MUST be ignored by the server.

UID (2 bytes): This field represents an authenticated user. If the server is operating in share level access control mode, then the UID is ignored. If the server is operating in user level access control mode, then the server MUST validate the UID.

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SMB_Parameters								SMB_Data (variable)
...

SMB_Parameters (1 byte):

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WordCount

WordCount (1 byte): This field MUST be 0x00. No parameters are sent by this message.

SMB_Data (variable):

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ByteCount																Bytes (variable)
...

ByteCount (2 bytes): This field MUST be greater than or equal to 0x0006.

Bytes (variable):

0	1	2	3	4	5	6	7	8	9	1 0	1	2	3	4	5	6	7	8	9	2 0	1	2	3	4	5	6	7	8	9	3 0	1
BufferFormat1								Path (variable)
...
BufferFormat2								Password (variable)
...
BufferFormat3								Service (variable)
...

BufferFormat1 (1 byte): A buffer format identifier. The value of this field MUST be 0x04.

Path (variable): A null-terminated string that represents the server and share name of the resource to which the client is attempting to connect. This field MUST be encoded using Universal Naming Convention (UNC) syntax. The string MUST be a null-terminated array of OEM characters, even if the client and server have negotiated to use Unicode strings.

A share path in UNC syntax would be represented by a string in the following form:

 \\server\share

BufferFormat2 (1 byte): A buffer format identifier. The value of this field MUST be 0x04.

Password (variable): A null-terminated string that represents a share password in plaintext form. The string MUST be a null-terminated array of OEM characters, even if the client and server have negotiated to use Unicode strings.

BufferFormat3 (1 byte): A buffer format identifier. The value of this field MUST be 0x04.

Service (variable): A null-terminated string representing the type of resource that the client intends to access. This field MUST be a null-terminated array of OEM characters, even if the client and server have negotiated to use Unicode strings. The valid values for this field are as follows:

Service String	Description
"A:"	Disk Share
"LPT1:"	Printer Share
"IPC"	Named Pipe
"COMM"	Serial Communications device
"?????"	Matches any type of device or resource