Problem with ReadAndX

[Mahendran]

Thanks Christopher, your information is very useful to me. Thanks a lot.

I am actually enhancing the samba on our product, that is basically to
follow the CIFS standard. I actually wanted to post this into "
cifs-protocol at cifs.org" for quarries related to CIFS. I am sorry if I am in
wrong place.

The information given by You and Derrell are very useful. Do you know any
forum where I can get cleared all my doubts with respect to protocol
implementation?

On Wed, Jan 21, 2009 at 8:36 PM, Christopher R. Hertel <crh at ubiqx.mn.org>wrote:

> I don't see much reason to implement LM1.2X002 unless you are planning on
> supporting very old OSes.  Windows 95, Windows NT 3.51, and all later OS
> Windows version support the NT LM 0.12 dialect, which is still in use
> today.
>  The only newer dialect is SMB2 which appeared in Vista.
>
> ...and as Volker asked, what version of Samba are you "enhancing"?  Samba
> has supported long file names for a long time.
>
> Are you actually enhancing Samba, or are you enhancing your own product
> that
> implements the same protocols supported by Samba?
>
> Chris -)-----
>
> MaheNabble wrote:
> > Hi,
> >
> > I am enhancing the Samba Server on our product to support Long Name. So I
> > started implementing the dialect "LM1.2X002" (first dialect that supports
> > Long Name, the current dialect that we support is PC_Network_Program). I
> > have implemented Negotiation, TreeConnectAndX, OpenAndX and Transaction2
> > Commands (FIND_FIRST2, NEXT2, FS_INFO) etc.
> >
> > The problem that I have is, when I try to read a file (which is of 4
> bytes,
> > just a txt file), the client sends READ_ANDX command about 40 times and
> > after a long time (about 45 seconds), it opens the file. After some
> > investigation, I noticed that there is a request (packet no 370) in which
> it
> > expects only 4 bytes of data from the offset 0x0000, there the ReadAndX
> > ends.
> >
> > I am not sure why there are so many request for just to read 4 bytes of
> > data. Why is it not succeeded in the first ReadAndX itself? Why is it
> > expecting 256 bytes of data (in the packet 121) instead of 4 bytes?
> >
> > I have attached the capture (in zip format, ReadAndX.zip) for your
> > reference. Your help will be highly appreciated.
> >
> > http://www.nabble.com/file/p21581921/ReadAndX.zip ReadAndX.zip
> > Best Regards,
> > Mahendran
>
> --
> "Implementing CIFS - the Common Internet FileSystem" ISBN: 013047116X
> Samba Team -- http://www.samba.org/     -)-----   Christopher R. Hertel
> jCIFS Team -- http://jcifs.samba.org/   -)-----   ubiqx development,
> uninq.
> ubiqx Team -- http://www.ubiqx.org/     -)-----   crh at ubiqx.mn.org
> OnLineBook -- http://ubiqx.org/cifs/    -)-----   crh at ubiqx.org
>