| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | COM class tables
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| 4 | Copyright (C) 2004 Jelmer Vernooij <jelmer@samba.org>
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| 5 |
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| 6 | This program is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2 of the License, or
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| 9 | (at your option) any later version.
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| 10 |
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| 11 | This program is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with this program; if not, write to the Free Software
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| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 19 | */
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| 20 |
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| 21 | #include "includes.h"
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| 22 | #include "../lib/util/dlinklist.h"
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| 23 | #include "lib/com/com.h"
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| 24 | #include "librpc/gen_ndr/ndr_misc.h"
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| 25 |
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| 26 | /* Specific implementation of one or more interfaces */
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| 27 | struct com_class
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| 28 | {
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| 29 | const char *progid;
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| 30 | struct GUID clsid;
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| 31 |
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| 32 | struct IUnknown *class_object;
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| 33 | struct com_class *prev, *next;
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| 34 | } * running_classes = NULL;
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| 35 |
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| 36 | static struct IUnknown *get_com_class_running(const struct GUID *clsid)
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| 37 | {
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| 38 | struct com_class *c = running_classes;
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| 39 |
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| 40 | while(c) {
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| 41 |
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| 42 | if (GUID_equal(clsid, &c->clsid)) {
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| 43 | return c->class_object;
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| 44 | }
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| 45 |
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| 46 | c = c->next;
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| 47 | }
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| 48 |
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| 49 | return NULL;
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| 50 | }
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| 51 |
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| 52 | static struct IUnknown *get_com_class_so(TALLOC_CTX *mem_ctx, const struct GUID *clsid)
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| 53 | {
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| 54 | char *mod_name;
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| 55 | char *clsid_str;
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| 56 | void *mod;
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| 57 | get_class_object_function f;
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| 58 |
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| 59 | clsid_str = GUID_string(mem_ctx, clsid);
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| 60 | mod_name = talloc_asprintf(mem_ctx, "%s.so", clsid_str);
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| 61 | talloc_free(clsid_str);
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| 62 |
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| 63 | mod = dlopen(mod_name, 0);
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| 64 |
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| 65 | if (!mod) {
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| 66 | return NULL;
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| 67 | }
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| 68 |
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| 69 | f = dlsym(mod, "get_class_object");
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| 70 |
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| 71 | if (!f) {
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| 72 | return NULL;
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| 73 | }
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| 74 |
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| 75 | return f(clsid);
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| 76 | }
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| 77 |
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| 78 | struct IUnknown *com_class_by_clsid(struct com_context *ctx, const struct GUID *clsid)
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| 79 | {
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| 80 | struct IUnknown *c;
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| 81 |
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| 82 | /* Check list of running COM classes first */
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| 83 | c = get_com_class_running(clsid);
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| 84 |
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| 85 | if (c != NULL) {
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| 86 | return c;
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| 87 | }
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| 88 |
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| 89 | c = get_com_class_so(ctx, clsid);
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| 90 |
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| 91 | if (c != NULL) {
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| 92 | return c;
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| 93 | }
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| 94 |
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| 95 | return NULL;
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| 96 | }
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| 97 |
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| 98 | NTSTATUS com_register_running_class(struct GUID *clsid, const char *progid, struct IUnknown *p)
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| 99 | {
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| 100 | struct com_class *l = talloc_zero(running_classes?running_classes:talloc_autofree_context(), struct com_class);
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| 101 |
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| 102 | l->clsid = *clsid;
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| 103 | l->progid = talloc_strdup(l, progid);
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| 104 | l->class_object = p;
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| 105 |
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| 106 | DLIST_ADD(running_classes, l);
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| 107 |
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| 108 | return NT_STATUS_OK;
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| 109 | }
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