1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
ldb database library
Copyright (C) Simo Sorce 2005
Copyright (C) Stefa Metzmacher <metze@samba.org> 2007
** NOTE! The following LGPL license applies to the ldb
** library. This does NOT imply that all of Samba is released
** under the LGPL
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/*
* Name: ldb
*
* Component: ldb deleted objects control module
*
* Description: this module hides deleted objects, and returns them if the control is there
*
* Author: Stefan Metzmacher
*/
#include "includes.h"
#include "ldb/include/ldb.h"
#include "ldb/include/ldb_errors.h"
#include "ldb/include/ldb_private.h"
#include "dsdb/samdb/samdb.h"
/* search */
struct show_deleted_search_request {
struct ldb_module *module;
void *up_context;
int (*up_callback)(struct ldb_context *, void *, struct ldb_reply *);
bool remove_from_msg;
};
static int show_deleted_search_callback(struct ldb_context *ldb, void *context, struct ldb_reply *ares)
{
struct show_deleted_search_request *ar;
ar = talloc_get_type(context, struct show_deleted_search_request);
if (ares->type == LDB_REPLY_ENTRY) {
bool isDeleted;
isDeleted = ldb_msg_find_attr_as_bool(ares->message, "isDeleted", false);
if (isDeleted) {
goto skip_deleted;
}
if (ar->remove_from_msg) {
ldb_msg_remove_attr(ares->message, "isDeleted");
}
}
return ar->up_callback(ldb, ar->up_context, ares);
skip_deleted:
talloc_free(ares);
return LDB_SUCCESS;
}
static int show_deleted_search(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_control *control;
struct ldb_control **saved_controls;
struct show_deleted_search_request *ar;
struct ldb_request *down_req;
char **new_attrs;
uint32_t num_attrs = 0;
uint32_t i;
int ret;
/* check if there's a show deleted control */
control = ldb_request_get_control(req, LDB_CONTROL_SHOW_DELETED_OID);
/* copy the request for modification */
down_req = talloc(req, struct ldb_request);
if (down_req == NULL) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
/* copy the request */
*down_req = *req;
/* if a control is there remove if from the modified request */
if (control && !save_controls(control, down_req, &saved_controls)) {
return LDB_ERR_OPERATIONS_ERROR;
}
/* if we had a control, then just go on to the next request as we have nothing to hide */
if (control) {
goto next_request;
}
ar = talloc(down_req, struct show_deleted_search_request);
if (ar == NULL) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
ar->module = module;
ar->up_context = req->context;
ar->up_callback = req->callback;
ar->remove_from_msg = true;
/* check if attrs only is specified, in that case check wether we need to modify them */
if (down_req->op.search.attrs) {
for (i=0; (down_req->op.search.attrs && down_req->op.search.attrs[i]); i++) {
num_attrs++;
if (strcasecmp(down_req->op.search.attrs[i], "*") == 0) {
ar->remove_from_msg = false;
} else if (strcasecmp(down_req->op.search.attrs[i], "isDeleted") == 0) {
ar->remove_from_msg = false;
}
}
} else {
ar->remove_from_msg = false;
}
if (ar->remove_from_msg) {
new_attrs = talloc_array(down_req, char *, num_attrs + 2);
if (!new_attrs) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
for (i=0; i < num_attrs; i++) {
new_attrs[i] = discard_const_p(char, down_req->op.search.attrs[i]);
}
new_attrs[i] = talloc_strdup(new_attrs, "isDeleted");
if (!new_attrs[i]) {
ldb_oom(module->ldb);
return LDB_ERR_OPERATIONS_ERROR;
}
new_attrs[i+1] = NULL;
down_req->op.search.attrs = (const char * const *)new_attrs;
}
down_req->context = ar;
down_req->callback = show_deleted_search_callback;
ldb_set_timeout_from_prev_req(module->ldb, req, down_req);
next_request:
/* perform the search */
ret = ldb_next_request(module, down_req);
/* do not free down_req as the call results may be linked to it,
* it will be freed when the upper level request get freed */
if (ret == LDB_SUCCESS) {
req->handle = down_req->handle;
}
return ret;
}
static int show_deleted_init(struct ldb_module *module)
{
struct ldb_request *req;
int ret;
req = talloc(module, struct ldb_request);
if (req == NULL) {
return LDB_ERR_OPERATIONS_ERROR;
}
req->operation = LDB_REQ_REGISTER_CONTROL;
req->op.reg_control.oid = LDB_CONTROL_SHOW_DELETED_OID;
req->controls = NULL;
ret = ldb_request(module->ldb, req);
if (ret != LDB_SUCCESS) {
ldb_debug(module->ldb, LDB_DEBUG_ERROR, "show_deleted: Unable to register control with rootdse!\n");
talloc_free(req);
return LDB_ERR_OPERATIONS_ERROR;
}
talloc_free(req);
return ldb_next_init(module);
}
_PUBLIC_ const struct ldb_module_ops ldb_show_deleted_module_ops = {
.name = "show_deleted",
.search = show_deleted_search,
.init_context = show_deleted_init
};
|
