Hi,
I am facing some difficulties in implementing the parser function.
Somehow - I keep getting a 'nca_s_fault_ndr' responses.
I guess this is due invalid parsing of parameters. I am counting on the
IDL specified here:
http://websvn.samba.org/cgi-bin/viewcvs.cgi/branches/SAMBA_4_0/source/librpc/idl/svcctl.idl?rev=18639&view=markup
And having couple of problems:
1.
svcctl_CreateServiceW defines [in,size_is(dependencies_size)] uint8
*dependencies and [in] uint32 dependencies_size. Which are uint8 type - I think
I can use a RPC_DATA_BLOB for that. This type appear in several places -
including the username/pass combination for the service user. Looking at a
Windows packet created with the CreateService() API, I can see the password is
encrypted. I don't know how to resolve this issue.
2. I am trying to create a simple service, ignoring all the
complicated issues, that is: passing 'null' at all places I don't
have to implement. But yet - all I am getting is a 'nca_s_fault_ndr'.
3. Questions:
1. How much should I count on the Samba4 IDL? How is it
generated? I found no official documentation on that.
2. Looking at the SMB package data I see that the
'Policy_handle' part is larger (in size) than the Windows
counterpart, my function does the same as the others
regarding this handle, so I am just ignoring this issue. Is
it wise?
3. I don't quite understand if it matters to declare a pointer
in the code (UNISTR2 *str) and then use the prs_pointer()
function rather than declaring a variable (UNISTR2 str) and
using the smb_io_unistr2() function. I saw the latter do
some padding (prs_align()), but I keep getting gaps in my
packets which I can't explain - no matter which function I use.
Regards, Danny.
Gerald (Jerry) Carter wrote:
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[EMAIL PROTECTED] wrote:
I am interested in implementing the 'createservice()' functionality
using the RPC protocol. I need this functionality badly, and I
understand it is not implemented.
I understand vaguely how this should be working and found
some documentation,
here: http://www.hsc.fr/ressources/articles/win_net_srv/
here:http://www.hsc.fr/ressources/articles/win_net_srv/
well_known_named_pipes.html
and here: http://www.hsc.fr/ressources/articles/win_net_srv/msrpc_srvsvc.html.
Also look at the svcctl.ild definition in SAMBA_4_0.
http://websvn.samba.org/cgi-bin/viewcvs.cgi/branches/SAMBA_4_0/source/librpc/idl/svcctl.idl?rev=18639&view=markup
I guess the issue here is to use the same method used
in the 'net' command ('net.c' - util) and try to call
the rpc-client with just different parameter as
the above mentioned links state.
I don't have much experience in samba programming and I
need to know:
(a) how complicate is that? should it be an easy task?
(b) I need some starting point.
(of course - if this is already implemented somewhere, i would
be glad to know!)
It's not too hard. Look at
svn://svnanon.samba.org/samba/SAMBA_3_0/source/utils/net_rpc_service.c
You'll need to do a few things.
* Add request/reply structures to include/rpc_svcctl.h
* Add the parsing functions to rpc_parse/parse_svcctl
* Add the client function to rpc_client/cli_svcctl.c
* Add in the new command to net_rpc_service.c
Start by looking at how the existing service management
calls are implemented and then start adapting that to the
new call. All make sure you have a current release of
wireshark to anaylze the traffic and make sure that
parsing functions are doing the right thing. Might even be
good idea to get comfortable with the trafiic between
two windows servers while playing with the Service Control
MMC plugin.
Hope this helps get you started.
cheers, jerry
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