samba - Oct 2023 - rpc_pipe_open_ncalrpc: connect(/run/samba/ncalrpc/EPMAPPER) failed: No such file or directory

Forgot to tell: I'm on Samba 4.17.10 and that are no files, but sockets

Regards
Ingo
https://github.com/WAdama

Ingo Asche via samba schrieb am 02.10.2023 um 11:24:
> Hi Michael,
>
> just to second Rowland, this is my /run/samba/ncalrpc:
>
> root at DC1:/run/samba/ncalrpc # ls -la
> total 0
> drwxr-xr-x 3 root root 100 Sep 28 11:34 .
> drwxr-xr-x 6 root root 440 Sep 28 19:03 ..
> srwxrwxrwx 1 root root?? 0 Sep 28 11:34 DEFAULT
> srwxrwxrwx 1 root root?? 0 Sep 28 11:34 EPMAPPER
> drwx------ 2 root root 460 Oct? 1 08:25 np
>
> Regards
> Ingo
> https://github.com/WAdama
>
> Rowland Penny via samba schrieb am 02.10.2023 um 11:06:
>> On Mon, 2 Oct 2023 11:37:00 +0300
>> Michael Tokarev via samba <samba at lists.samba.org> wrote:
>>
>>> 01.10.2023 17:04, Rowland Penny via samba wrote:
>>>> On Sun, 1 Oct 2023 08:41:01 +0300
>>>> Michael Tokarev via samba <samba at lists.samba.org>
wrote:
>>>>
>>>>> This question has already been asked in the past, but there
was
>>>>> no answer.
>>>>>
>>>>> The above message is logged quite often
>>>>> in /var/log/samba/log.samba-dcerpcd. This is a stand-alone
>>>>> anonymous read-only server.
>>>>>
>>>>> Is it something to worry about?? It smells like samba
isn't working
>>>>> properly.
>>>> This could be something as simple as the directory being
created as
>>>> '/run/samba/ncalrpc/np/epmapper' and being searched for
as
>>>> '/run/samba/ncalrpc/np/EPMAPPER'. Which may or may not
matter,
>>>> depending on just what is supposed to end up in the
>>>> 'emapper/EMAPPER' directory. Interestingly, I have
>>>> '/run/samba/ncalcrpc/np/emapper' and
'/run/samba/ncalrpc/EPMAPPER',
>>>> I wonder if I should ?
>>>>
>>>> To me, this sounds like a bug, should the directory be created
as
>>>> '/run/samba/ncalrpc/np/EPMAPPER' or should it be
searched for as
>>>> '/run/samba/ncalrpc/np/epmapper' ?
>>> I tried (sym)linking one to the other the first time it happened, -
it
>>> didn't work. I don't remember the error at that time
though. Think it
>>> was with 4.16 still.? Lemme try it again..
>> What I was trying to get at was the 'error' is that it seems to
search
>> in uppercase, but it is created in lowercase, one of those must be 
>> wrong.
>> Which, I do not know, mainly because I also have 'EPMAPPER' in
>> /run/samba/ncalrpc.
>>
>> I initially thought they were directories, but a bit more investigation
>> turned up this from both:
>>
>> ls /run/samba/ncalrpc/EPMAPPER/
>> ls: cannot access '/run/samba/ncalrpc/EPMAPPER/': Not a
directory
>> ls -lad /run/samba/ncalrpc/np/epmapper/
>> ls: cannot access '/run/samba/ncalrpc/np/epmapper/': Not a
directory
>>
>> So, they must, it appears, be files
>>
>>>>> If yes, how can I fix it?
>>>> As a workaround, you could try setting 'log level = 0'.
>>> Nope, definitely not, - as I wrote before, this message fills in
the
>>> logs and *other* important messages are hidden in the flood as the
>>> result.? I want to know if something bad happens, not to hide
errors,
>>> - this is why I asked in the first place.? I can change debug level
of
>>> this very message to be something larger than current 0 and
recompile,
>>> *that* would be real workaround.
>> I didn't think it would work, I just threw it it in as a thought
and
>> placeholder whilst the proper problem was fixed :-(
>>
>>> But I'd rather find the root cause and fix it instead.
>> I 'think' the correct fix would be to find where
'epmapper' is being
>> set to 'EPMAPPER' and fix that, but my 'C' isn't
good enough to chase
>> it down, never mind fix it.
>> ? Perhaps you should log a bug report ?
>>
>>> ...
>>>> http://www.dcerpc.org/
>>>>
>>>>
https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-rpce/290c38b1-92fe-4229-91e6-4fc376610c15
>>>>
>>>>
>>>> https://wiki.samba.org/index.php/DCERPC
>>> I've one name forever associated with samba & dcerpc in my
mind -
>>> Luke Kenneth Casson Leighton.? I think he was the one who created
>>> dcerpc.org. And he was the strong advocate to rewrite most things
>>> in samba (samba2 at the time, iirc) to use dcerpc in late 1990s..
>>> with lots of emails on samba mailing lists, and with a lot of
>>> resistance around that.? Dunno where he is now..
>>>
>> Wasn't that the guy who tried to fork Samba (Samba-NG ?) after
falling
>> out with the rest of the Samba devs ? Before my time.
>>
>> Rowland
>>
>>
>>
>
>

On Mon, 2 Oct 2023 11:34:23 +0200
Ingo Asche via samba <samba at lists.samba.org> wrote:
> Forgot to tell: I'm on Samba 4.17.10 and that are no files, but
> sockets
> 
Interestingly, I was looking on Samba 4.17.10 running on my DCs
(Raspberry pi OS hasn't got to Bookworm yet) and that is where I have
/run/samba/ncalrpc/EPMAPPER.

I have just updated my main client and it is running 4.18.6 and it
doesn't have the 'EPMAPPER' socket, just
/run/samba/ncalrpc/np/epmapper.

Rowland