Wireshark · Ethereal-users: Re: [Ethereal-users] SMB Trans2 request

[Guy Harris <gharris@xxxxxxxxx>]

Prize Jose wrote:

> Can some one please explain me the meaning of  'SMB Trans2 ' request and
> response.

SMB's "transaction" mechanism is used to implement requests and 
responses that could transfer more data than the limited amounts some 
mechanisms over which SMB is sent allow in a single packet.

Several different types of operations, including the operations that 
scan directories and return information about the files and 
subdirectories in that directory, use the "transaction" mechanism.  The 
directory-scanning operations are probably the most frequently seen 
operations that use the "trans2" request, and:

> Subcommand: QUERY_FILE_INFO (0x0007)

...that's probably what the Trans2 request you sent is (you'll probably 
see "find first" or "find next" (perhaps all capitalized, and perhaps 
with underscores or nothing between "find" and "first" or "next") in the 
dissection of those requests.

If the time between the request and the response is large, this might be 
a problem with the server - scanning a large directory might be slow. 
What operating system is the server running and, if it's some flavor of 
UN*X (commercial UN*X including Mac OS X, Linux, some flavor of BSD), is 
it using Samba and, if so, what version of Samba is it using?