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DEFINITIONS
This source file includes following definitions.
- get_com_class_running
- get_com_class_so
- com_class_by_clsid
- com_register_running_class
1 /*
2 Unix SMB/CIFS implementation.
3 COM class tables
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 "librpc/gen_ndr/ndr_misc.h"
25
26 /* Specific implementation of one or more interfaces */
27 struct com_class
28 {
29 const char *progid;
30 struct GUID clsid;
31
32 struct IUnknown *class_object;
33 struct com_class *prev, *next;
34 } * running_classes = NULL;
35
36 static struct IUnknown *get_com_class_running(const struct GUID *clsid)
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37 {
38 struct com_class *c = running_classes;
39
40 while(c) {
41
42 if (GUID_equal(clsid, &c->clsid)) {
43 return c->class_object;
44 }
45
46 c = c->next;
47 }
48
49 return NULL;
50 }
51
52 static struct IUnknown *get_com_class_so(TALLOC_CTX *mem_ctx, const struct GUID *clsid)
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53 {
54 char *mod_name;
55 char *clsid_str;
56 void *mod;
57 get_class_object_function f;
58
59 clsid_str = GUID_string(mem_ctx, clsid);
60 mod_name = talloc_asprintf(mem_ctx, "%s.so", clsid_str);
61 talloc_free(clsid_str);
62
63 mod = dlopen(mod_name, 0);
64
65 if (!mod) {
66 return NULL;
67 }
68
69 f = dlsym(mod, "get_class_object");
70
71 if (!f) {
72 return NULL;
73 }
74
75 return f(clsid);
76 }
77
78 struct IUnknown *com_class_by_clsid(struct com_context *ctx, const struct GUID *clsid)
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79 {
80 struct IUnknown *c;
81
82 /* Check list of running COM classes first */
83 c = get_com_class_running(clsid);
84
85 if (c != NULL) {
86 return c;
87 }
88
89 c = get_com_class_so(ctx, clsid);
90
91 if (c != NULL) {
92 return c;
93 }
94
95 return NULL;
96 }
97
98 NTSTATUS com_register_running_class(struct GUID *clsid, const char *progid, struct IUnknown *p)
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99 {
100 struct com_class *l = talloc_zero(running_classes?running_classes:talloc_autofree_context(), struct com_class);
101
102 l->clsid = *clsid;
103 l->progid = talloc_strdup(l, progid);
104 l->class_object = p;
105
106 DLIST_ADD(running_classes, l);
107
108 return NT_STATUS_OK;
109 }