[jcifs] VC Number = 0 from XP but not 2003

[Michael B Allen]

Hi Brian,

I have confirmed your diagnosis. Frame 458 is not as interesting
because even though there is an RST from the server, it is immediately
preceeded by an SMB_COM_FIND_CLOSE2. But frame 5656 is an
SMB_COM_NT_CREATE_ANDX request that clearly gets cut off by an RST
from the server immediately after the SMB_COM_SESSION_SETUP_ANDX with
VC Number = 0 from the XP machine hosting JCIFS.

I have just tried an XP install I have here and it also uses VC Number
= 0. However, a Windows 2003 Server I have uses VC Number = 0 for
connecting to IPC$ but it uses VC Number = 1 for connecting to a
conventional share (or maybe it's 1 because it's an additional session
- the session on IPC$ was on the same socket).

So I definitively confirm your diagnosis: The session setup from XP is
clearly cutting off the JCIFS transport.

Unfortunately I do not have a good solution for you. I don't know if
there's even a way to change this behavior of Windows. Do you know
Chris?

Mike

-- 
Michael B Allen
Java Active Directory Integration
http://www.ioplex.com/


On Tue, Sep 7, 2010 at 8:59 AM, Brian Bowley <bbowley at cleo.com> wrote:
> Hi Mike,
>
> Please see the attached screen captures from Wireshark using the JCIFSvsWindows.pcap file I sent previously.
>
> In the screen captures you can see a "VC Number: 0" (Frames 459 and 5653). Shortly afterwards the other (JCIFS) connection is reset by the server.
>
> Thanks,
> Brian Bowley | Senior Software Engineer
> Cleo Communications | P: 815-282-7631 | F: 800-380-7114 | bbowley at cleo.com | www.cleo.com
>
> CLEO - Helping Move Your Business Forward
> Find out how we are helping more than 30,000 customers Secure, Manage and Integrate data and documents.
>
> -----Original Message-----
> From: Michael B Allen [mailto:ioplex at gmail.com]
> Sent: Saturday, September 04, 2010 5:07 PM
> To: Brian Bowley
> Cc: jcifs at lists.samba.org
> Subject: Re: [jcifs] Connection Reset during jcifs data transfer .......
>
> Hi Brian,
>
> I did not see any session setups with VC Number = 0 in your capture.
>
> Mike
>
> On Tue, Aug 31, 2010 at 9:24 AM, Brian Bowley <bbowley at cleo.com> wrote:
>> Mike,
>>
>> Attached is a zip file containing the capture.
>
> --
> Michael B Allen
> Java Active Directory Integration
> http://www.ioplex.com/
>