source4/lib/com/main.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Main COM functionality
   4    Copyright (C) 2004 Jelmer Vernooij <jelmer@samba.org>
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22 #include "../lib/util/dlinklist.h"
  23 #include "lib/com/com.h"
  24 #include "lib/events/events.h"
  25 #include "librpc/gen_ndr/com_dcom.h"
  26
  27 WERROR com_init_ctx(struct com_context **ctx, struct tevent_context *event_ctx)
  28 {
  29         *ctx = talloc(NULL, struct com_context);
  30         if (event_ctx == NULL) {
  31                 event_ctx = samba_tevent_context_init(*ctx);
  32         }
  33         (*ctx)->event_ctx = event_ctx;
  34         return WERR_OK;
  35 }
  36
  37 WERROR com_create_object(struct com_context *ctx, struct GUID *clsid, int num_ifaces, struct GUID *iid, struct IUnknown **ip, WERROR *results)
  38 {
  39         struct IUnknown *iunk = NULL;
  40         struct IClassFactory *factory;
  41         WERROR error;
  42         int i;
  43         struct GUID classfact_iid;
  44
  45         GUID_from_string(NDR_ICLASSFACTORY_UUID, &classfact_iid);
  46
  47         /* Obtain class object */
  48         error = com_get_class_object(ctx, clsid, &classfact_iid, (struct IUnknown **)&factory);
  49         if (!W_ERROR_IS_OK(error)) {
  50                 DEBUG(3, ("Unable to obtain class object for %s\n", GUID_string(NULL, clsid)));
  51                 return error;
  52         }
  53
  54         /* Run IClassFactory::CreateInstance() */
  55         error = IClassFactory_CreateInstance(factory, ctx, NULL, &classfact_iid, (struct MInterfacePointer *) &iunk);
  56         if (!W_ERROR_IS_OK(error)) {
  57                 DEBUG(3, ("Error while calling IClassFactory::CreateInstance : %s\n", win_errstr(error)));
  58                 return error;
  59         }
  60
  61         if (!iunk) {
  62                 DEBUG(0, ("IClassFactory_CreateInstance returned success but result pointer is still NULL!\n"));
  63                 return WERR_GENERAL_FAILURE;
  64         }
  65
  66         /* Release class object */
  67         IUnknown_Release(factory, ctx);
  68
  69         error = WERR_OK;
  70
  71         /* Do one or more QueryInterface calls */
  72         for (i = 0; i < num_ifaces; i++) {
  73                 results[i] = IUnknown_QueryInterface(iunk, ctx, &iid[i], &ip[i]);
  74                 if (!W_ERROR_IS_OK(results[i])) error = results[i];
  75         }
  76
  77         return error;
  78 }
  79
  80 WERROR com_get_class_object(struct com_context *ctx, struct GUID *clsid, struct GUID *iid, struct IUnknown **ip)
  81 {
  82         struct IUnknown *iu;
  83
  84         iu = com_class_by_clsid(ctx, clsid);
  85         if (!iu) {
  86                 return WERR_CLASS_NOT_REGISTERED;
  87         }
  88
  89         return IUnknown_QueryInterface(iu, ctx, iid, ip);
  90 }