[jcifs] authentication problem when server is in shared security mode

[leostone]

Can someone please revise the code in jcifs.smb.SmbSession around line 300
and related code. From a first glance I suspect a program logic problem when a server is configured
with "shared" security. I encountered the same problem like Larry Weber, on a linux/samba server and 
on a XP/SP2 machine. I tracked the problem down to that if on the Windows Machine I DON'T use 
"Simple Sharing" ( "Einfache Dateifreigabe", I use a german system) (Explorer->Extras->Folder options->Use Simple Sharing)
everything works fine, but if I use it it seems even though I supply valid user credentials the session is beeing logged on as "Guest" and the
checking code throws an exception. 
Similar with the linux machine. I had the samba server configured with shared security and had 
a share that was configured "only user", see "man smb.conf", with that configuration the session on is also beeing established as guest.
When I changed the server security to "user" everthing worked as excpected. 
I guess the problem is that you do a tree connect to IPC$ and if the server is in "shared" security mode it will always? return a guest session which
causes all connections that are not beeing made as guest will get kickt out by that checking code around line 300.