Re: RunningObjectTable problem

Hi Alexander,

Following your request, The following is bottom posted

Q:
***********************************************

Hi,

I am using COM with RunningObjectTable, take in mind the following points:

1. I have a server that runs as a service this service register an object
in
ROT, the object should be accesible to usermode applications
2. I have a user mode application trying to get the interface pointer to
the
objsect registered by thye service in ROT

spROT->GetObjectW failes with 0x800401e3 on the user mode application

when running my server as an application ( and not as a service ) the
interface is retrieved successfully.

Enumerating all the ROT objects by the app didn't show the object
registered
by the service.

It seems as if there is a different context per desktop ( such as with
named
kernel objects ), is there any special namespace I cane use ( such as
'Global' ) that will enable a non service app to resolve objects
registered
by a service?

Why does this happen? Why objects registered in ROT by a service are not
accessible to non service applications?

Any help would be appreciated.

--
Nadav
   http://www.sophin.com

A:
***********************************************
Have you register the object with the ROTFLAGS_ALLOWANYCLIENT flag set?

Willy.

Q:
***********************************************
Hi Willy,

Thanks for your immediate response, I have tried to use
ROTFLAGS_ALLOWANYCLIENT, this results: 0x80004015 The class is configured
to
run as a security id different from the caller

Some background:
My "server" is an AtlComModule DLL loaded by snmp.exe on the entry point
(
SnmpExtensionInit ) a specialized thread is created, this thread
instentiate
the COM object and register it on the ROT, when using
ROTFLAGS_ALLOWANYCLIENT
I get the error described above.

How can I resolve this problem ( 0x80004015 )how can I configure the class
security id? is there any COM specific configuration I should do ?

A:
***********************************************
Read the documentation carefully:

http://msdn2.microsoft.com/en-us/library/ms680747.aspx

In particular:

"A server registered as either LocalService or RunAs can set the
ROTFLAGS_ALLOWANYCLIENT flag in its call to Register to allow any client
to
connect to it. A server setting this bit must have its executable name in
the AppID section of the registry that refers to the AppID for the
executable."

HTH,

Brian

Q:
***********************************************
Hi Brian,

Thanks for your response, I have added the following:
HKCR
{
 ...
 ...
 NoRemove AppID
 {
   ForceRemove 'ROTTester.DLL'
   {
     val AppId = s '%APPID%'
   }
   ForceRemove '%APPID%'
   {
     val RunAs = s 'Interactive User'
   }
 }
}

Unfortunetly, it didn't help I still get 0x80004015

Additional background:
1. I am writing an SNMP Extension Agent
2. The extension agent expose SNMP API and enclose a CAtlDllModule
3. During SNMP initialization ( SnmpExtensionInit ) I create the COM
object
( implemented by the DLL ) and try to register it in ROT using
ROTFLAGS_ALLOWANYCLIENT, this returns 0x80004015

Taking the above in mind giving special attention to the fact that my DLL
is
registered as a SnmpExtension DLL and is loaded by snmp.exe, is it somehow
possible to have an inproc COM object registered in ROT with
ROTFLAGS_ALLOWANYCLIENT ?

A:
***********************************************
IMHO you haven't followed instructions. You must use an executable to
register the COM object in the ROT, and the executable must outlive the
registration period. A DLL is not an executable.

Unfortunately, I know nothing about SNMP extensions, but I reckon the
AppID
must be the name of the SNMP service.

This is admittedly on the fringe of my expertise but hopefully this will
be
of some help.

Brian

Q:
***********************************************
Hi Brian,

Thanks for your help, unfortunetly, my application must be implemneted as
a
DLL and not as EXEcutable, creating an AppId ( that reference the COM
DLL )
for snmp.exe doesn't help...

--
Nadav
   http://www.sophin.com