4 Copyright (C) Andrew Tridgell 2005
6 ** NOTE! The following LGPL license applies to the ldb
7 ** library. This does NOT imply that all of Samba is released
10 This library is free software; you can redistribute it and/or
11 modify it under the terms of the GNU Lesser General Public
12 License as published by the Free Software Foundation; either
13 version 3 of the License, or (at your option) any later version.
15 This library is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with this library; if not, see <http://www.gnu.org/licenses/>.
24 register handlers for specific attributes and objectclass relationships
26 this allows a backend to store its schema information in any format
27 it likes (or to not have any schema information at all) while keeping the
28 message matching logic generic
31 #include "ldb_private.h"
34 add a attribute to the ldb_schema
36 if flags contains LDB_ATTR_FLAG_ALLOCATED
37 the attribute name string will be copied using
38 talloc_strdup(), otherwise it needs to be a static const
39 string at least with a lifetime longer than the ldb struct!
41 the ldb_schema_syntax structure should be a pointer
42 to a static const struct or at least it needs to be
43 a struct with a longer lifetime than the ldb context!
46 int ldb_schema_attribute_add_with_syntax(struct ldb_context
*ldb
,
47 const char *attribute
,
49 const struct ldb_schema_syntax
*syntax
)
52 struct ldb_schema_attribute
*a
;
55 return LDB_ERR_OPERATIONS_ERROR
;
58 n
= ldb
->schema
.num_attributes
+ 1;
60 a
= talloc_realloc(ldb
, ldb
->schema
.attributes
,
61 struct ldb_schema_attribute
, n
);
66 ldb
->schema
.attributes
= a
;
68 for (i
= 0; i
< ldb
->schema
.num_attributes
; i
++) {
69 int cmp
= ldb_attr_cmp(attribute
, a
[i
].name
);
71 /* silently ignore attempts to overwrite fixed attributes */
72 if (a
[i
].flags
& LDB_ATTR_FLAG_FIXED
) {
75 if (a
[i
].flags
& LDB_ATTR_FLAG_ALLOCATED
) {
76 talloc_free(discard_const_p(char, a
[i
].name
));
78 /* To cancel out increment below */
79 ldb
->schema
.num_attributes
--;
82 memmove(a
+i
+1, a
+i
, sizeof(*a
) * (ldb
->schema
.num_attributes
-i
));
86 ldb
->schema
.num_attributes
++;
88 a
[i
].name
= attribute
;
92 if (a
[i
].flags
& LDB_ATTR_FLAG_ALLOCATED
) {
93 a
[i
].name
= talloc_strdup(a
, a
[i
].name
);
94 if (a
[i
].name
== NULL
) {
103 static const struct ldb_schema_syntax ldb_syntax_default
= {
104 .name
= LDB_SYNTAX_OCTET_STRING
,
105 .ldif_read_fn
= ldb_handler_copy
,
106 .ldif_write_fn
= ldb_handler_copy
,
107 .canonicalise_fn
= ldb_handler_copy
,
108 .comparison_fn
= ldb_comparison_binary
111 static const struct ldb_schema_attribute ldb_attribute_default
= {
114 .syntax
= &ldb_syntax_default
118 return the attribute handlers for a given attribute
120 const struct ldb_schema_attribute
*ldb_schema_attribute_by_name(struct ldb_context
*ldb
,
124 const struct ldb_schema_attribute
*def
= &ldb_attribute_default
;
126 /* as handlers are sorted, '*' must be the first if present */
127 if (strcmp(ldb
->schema
.attributes
[0].name
, "*") == 0) {
128 def
= &ldb
->schema
.attributes
[0];
132 /* do a binary search on the array */
133 e
= ldb
->schema
.num_attributes
- 1;
139 r
= ldb_attr_cmp(name
, ldb
->schema
.attributes
[i
].name
);
141 return &ldb
->schema
.attributes
[i
];
156 add to the list of ldif handlers for this ldb context
158 void ldb_schema_attribute_remove(struct ldb_context
*ldb
, const char *name
)
160 const struct ldb_schema_attribute
*a
;
163 a
= ldb_schema_attribute_by_name(ldb
, name
);
164 if (a
== NULL
|| a
->name
== NULL
) {
168 /* FIXED attributes are never removed */
169 if (a
->flags
& LDB_ATTR_FLAG_FIXED
) {
173 if (a
->flags
& LDB_ATTR_FLAG_ALLOCATED
) {
174 talloc_free(discard_const_p(char, a
->name
));
177 i
= a
- ldb
->schema
.attributes
;
178 if (i
< ldb
->schema
.num_attributes
- 1) {
179 memmove(&ldb
->schema
.attributes
[i
],
180 a
+1, sizeof(*a
) * (ldb
->schema
.num_attributes
-(i
+1)));
183 ldb
->schema
.num_attributes
--;
187 setup a attribute handler using a standard syntax
189 int ldb_schema_attribute_add(struct ldb_context
*ldb
,
190 const char *attribute
,
194 const struct ldb_schema_syntax
*s
= ldb_standard_syntax_by_name(ldb
, syntax
);
195 return ldb_schema_attribute_add_with_syntax(ldb
, attribute
, flags
, s
);
199 setup the attribute handles for well known attributes
201 int ldb_setup_wellknown_attributes(struct ldb_context
*ldb
)
207 { "dn", LDB_SYNTAX_DN
},
208 { "distinguishedName", LDB_SYNTAX_DN
},
209 { "cn", LDB_SYNTAX_DIRECTORY_STRING
},
210 { "dc", LDB_SYNTAX_DIRECTORY_STRING
},
211 { "ou", LDB_SYNTAX_DIRECTORY_STRING
},
212 { "objectClass", LDB_SYNTAX_OBJECTCLASS
}
217 for (i
=0;i
<ARRAY_SIZE(wellknown
);i
++) {
218 ret
= ldb_schema_attribute_add(ldb
, wellknown
[i
].attr
, 0,
219 wellknown
[i
].syntax
);
220 if (ret
!= LDB_SUCCESS
) {
230 add a extended dn syntax to the ldb_schema
232 int ldb_dn_extended_add_syntax(struct ldb_context
*ldb
,
234 const struct ldb_dn_extended_syntax
*syntax
)
237 struct ldb_dn_extended_syntax
*a
;
240 return LDB_ERR_OPERATIONS_ERROR
;
243 n
= ldb
->schema
.num_dn_extended_syntax
+ 1;
245 a
= talloc_realloc(ldb
, ldb
->schema
.dn_extended_syntax
,
246 struct ldb_dn_extended_syntax
, n
);
249 return LDB_ERR_OPERATIONS_ERROR
;
252 a
[ldb
->schema
.num_dn_extended_syntax
] = *syntax
;
253 ldb
->schema
.dn_extended_syntax
= a
;
255 ldb
->schema
.num_dn_extended_syntax
= n
;
261 return the extended dn syntax for a given name
263 const struct ldb_dn_extended_syntax
*ldb_dn_extended_syntax_by_name(struct ldb_context
*ldb
,
267 for (i
=0; i
< ldb
->schema
.num_dn_extended_syntax
; i
++) {
268 if (ldb_attr_cmp(ldb
->schema
.dn_extended_syntax
[i
].name
, name
) == 0) {
269 return &ldb
->schema
.dn_extended_syntax
[i
];