samba - Sep 2002 - For developers

Hello, developers of samba.

http://support.microsoft.com/default.aspx?scid=KB;EN-US;Q316740&

SMB Logoff Command Is Not Sent When Session Is Disconnected

The information in this article applies to:

Microsoft Windows 2000 Advanced Server
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Server
Microsoft Windows XP Professional
Microsoft Windows XP Home Edition

SYMPTOMS

Windows 2000 and Windows XP do not send an SMB Logoff & X command when an
SMB session is disconnected from an SMB server that does not understand
Microsoft Windows NT status codes. This includes certain UNIX servers such as
Linux that is running Samba SMB Server, Microsoft Windows 98, Microsoft Lan
Manager, and so on.

CAUSE

When you disconnect a mapped drive to a share on the server, the client sends a
Tree Disconnect &X command to the server. If that is the last mapped drive
to that server, this command is followed by a logoff &X command to clean up
all sessions for that user. Windows 2000 and Windows XP clients do not send the
logoff &X command to the SMB server if the server does not understand
Windows NT status codes, even if the dialect that was negotiated is NT LM 0.12
(the highest version of dialect that is supported by Windows 2000 and Windows
XP). This design change was made in Windows 2000 and Windows XP because many SMB
servers that do not support Windows NT status codes cannot correctly handle
session logoffs.

STATUS

This behavior is by design.

MORE INFORMATION

The user session is cleaned up when the transport session between the client and
server is closed. For example, if you are using TCP/IP for the connection,
Windows 2000 and Windows XP will close that TCP session with the server, ending
the user session as well. Windows 2000 and Windows XP closes this transport
session much sooner than earlier versions of Windows to prevent open user
sessions to linger on the server.

p.s. I think, this bug must be closed before samba 2.2.6 is released.

-- 
 Vladimir I. Umnov                         mailto:samba@ezmail.ru

On Tue, 10 Sep 2002, Vladimir I. Umnov wrote:
> Windows 2000 and Windows XP do not send an SMB Logoff & X command when
> an SMB session is disconnected from an SMB server that does not
> understand Microsoft Windows NT status codes. This includes certain UNIX
> servers such as Linux that is running Samba SMB Server, Microsoft
> Windows 98, Microsoft Lan Manager, and so on.
SAMBA_2_2 does support NT status codes.  This bug does not apply to us.
The KB article is wrong.






cheers, jerry
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Hello, Gerald.

GJC> On Tue, 10 Sep 2002, Vladimir I. Umnov wrote:
>> Windows 2000 and Windows XP do not send an SMB Logoff & X command
when
>> an SMB session is disconnected from an SMB server that does not
>> understand Microsoft Windows NT status codes. This includes certain
UNIX
>> servers such as Linux that is running Samba SMB Server, Microsoft
>> Windows 98, Microsoft Lan Manager, and so on.
GJC> SAMBA_2_2 does support NT status codes.  This bug does not apply to us.
GJC> The KB article is wrong.
Ok, according to Microsoft related article, we must set
HKLM\SYSTEM\CurrentControlSet\Services\lanmanworkstation\parameters\EnableDownLevelLogOff
to "1"
for enabling sending of SMB Logoff & X command!!!
I check it tomorrow and send results after that.

-- 
 Vladimir I. Umnov                          mailto:samba@ezmail.ru