GET_DFS_REFERRALS and IPC$

[Richard Sharpe]

On Tue, Dec 1, 2015 at 10:42 AM, Jeremy Allison <jra at samba.org> wrote:
> On Tue, Dec 01, 2015 at 08:27:06AM -0800, Richard Sharpe wrote:
>> On Mon, Nov 30, 2015 at 2:59 PM, Richard Sharpe
>> <realrichardsharpe at gmail.com> wrote:
>> > Hi folks,
>> >
>> > my copy of [MS-SMB].pdf contains these words WRT DFS referrals:
>> >
>> > -----------------------------------------------
>> > 3.2.4.20.3 Application Requests DFS Referral Information
>> > ...
>> >
>> > The client MUST search for an existing Session and TreeConnect to any
>> > share on the server identified by ServerName for the user identified
>> > by UserCredentials. If no Session and TreeConnect are found, the
>> > client MUST establish a new Session and TreeConnect to IPC$ on the
>> > target server as described in section 3.2.4.2 using the supplied
>> > ServerName and UserCredentials.
>> > ...
>> > -------------------------------------------------
>> >
>> > However, Windows clients seem not to do that and always seem to use
>> > IPC$ for DFS referrals even when they have connections open on the
>> > target server.
>> >
>> > Has anyone seen any cases where Windows clients use shares other than IPC$?
>>
>> Following up from this, I have seen claims from Load Dynamics
>> (formerly, SwiftTest) that they have test cases where they send
>> GET_DFS_REFERRALS to Windows servers on normal shares and it works.
>>
>> I have asked for a capture.
>>
>> Samba does not like it, however, and sends back
>> NT_STATUS_INVALID_DEVICE_REQUEST.
>
> Interesting. If we get a Windows capture showing
> this we should implement the same semantics as
> a Windows server.

That was my thinking.

I should have a capture later today.

-- 
Regards,
Richard Sharpe
(何以解憂？唯有杜康。--曹操)