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authorMatthias Dieter Wallnöfer <mdw@samba.org>2010-11-03 17:50:30 +0100
committerMatthias Dieter Wallnöfer <mdw@samba.org>2010-11-03 17:48:18 +0000
commitb78bf4d72100f9aa8c50ee36b30ba353e2b72eae (patch)
tree68007f4266edd740289c6b596cdf207168825e6e /source4
parent4311438528aaf30fff878c3862fd1d76f6059f56 (diff)
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s4:samldb LDB module - improve the "get_single_valued_attr" call and move it into "ldb_modules/util.c"
It will be used by other LDB modules as well.
Diffstat (limited to 'source4')
-rw-r--r--source4/dsdb/samdb/ldb_modules/samldb.c90
-rw-r--r--source4/dsdb/samdb/ldb_modules/util.c30
2 files changed, 36 insertions, 84 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/samldb.c b/source4/dsdb/samdb/ldb_modules/samldb.c
index 13b173a6bc..73776abc25 100644
--- a/source4/dsdb/samdb/ldb_modules/samldb.c
+++ b/source4/dsdb/samdb/ldb_modules/samldb.c
@@ -757,53 +757,6 @@ static int samldb_schema_info_update(struct samldb_ctx *ac)
}
/*
- * Gets back a single-valued attribute by the rules of the SAM triggers when
- * performing a modify operation
- */
-static int samldb_get_single_valued_attr(struct samldb_ctx *ac,
- const char *attr_name,
- struct ldb_message_element **attr)
-{
- struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
- struct ldb_message_element *el = NULL;
- unsigned int i;
-
- /* We've to walk over all modification entries and consider the
- * "attr_name" ones.
- *
- * 1.) Add operations aren't allowed and there is returned
- * "ATTRIBUTE_OR_VALUE_EXISTS".
- * 2.) Replace operations are allowed but the last one is taken
- * 3.) Delete operations are also not allowed and there is returned
- * "UNWILLING_TO_PERFORM".
- *
- * If "el" is afterwards NULL then that means we've nothing to do here.
- */
- for (i = 0; i < ac->msg->num_elements; i++) {
- if (ldb_attr_cmp(ac->msg->elements[i].name, attr_name) != 0) {
- continue;
- }
-
- el = &ac->msg->elements[i];
- if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_ADD) {
- ldb_asprintf_errstring(ldb,
- "samldb: attribute '%s' already exists!",
- attr_name);
- return LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS;
- }
- if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
- ldb_asprintf_errstring(ldb,
- "samldb: attribute '%s' cannot be deleted!",
- attr_name);
- return LDB_ERR_UNWILLING_TO_PERFORM;
- }
- }
-
- *attr = el;
- return LDB_SUCCESS;
-}
-
-/*
* "Objectclass" trigger (MS-SAMR 3.1.1.8.1)
*
* Has to be invoked on "add" and "modify" operations on "user", "computer" and
@@ -1056,10 +1009,7 @@ static int samldb_prim_group_change(struct samldb_ctx *ac)
struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
int ret;
- ret = samldb_get_single_valued_attr(ac, "primaryGroupID", &el);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
+ el = dsdb_get_single_valued_attr(ac->msg, "primaryGroupID");
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
@@ -1204,10 +1154,7 @@ static int samldb_user_account_control_change(struct samldb_ctx *ac)
struct ldb_message *tmp_msg;
int ret;
- ret = samldb_get_single_valued_attr(ac, "userAccountControl", &el);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
+ el = dsdb_get_single_valued_attr(ac->msg, "userAccountControl");
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
@@ -1280,10 +1227,7 @@ static int samldb_group_type_change(struct samldb_ctx *ac)
struct ldb_message *tmp_msg;
int ret;
- ret = samldb_get_single_valued_attr(ac, "groupType", &el);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
+ el = dsdb_get_single_valued_attr(ac->msg, "groupType");
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
@@ -1369,10 +1313,7 @@ static int samldb_sam_accountname_check(struct samldb_ctx *ac)
struct ldb_message *tmp_msg;
int ret;
- ret = samldb_get_single_valued_attr(ac, "sAMAccountName", &el);
- if (ret != LDB_SUCCESS) {
- return ret;
- }
+ el = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName");
if (el == NULL) {
/* we are not affected */
return LDB_SUCCESS;
@@ -1529,27 +1470,8 @@ static int samldb_service_principal_names_change(struct samldb_ctx *ac)
unsigned int i;
int ret;
- /* Here it's not the same logic as with "samldb_get_single_valued_attr".
- * We need to:
- *
- * - consider "add" and "replace" operations - the last value we take
- * - ignore "delete" operations - obviously this attribute isn't
- * write protected
- */
- for (i = 0; i < ac->msg->num_elements; i++) {
- if ((ldb_attr_cmp(ac->msg->elements[i].name,
- "dNSHostName") == 0) &&
- (LDB_FLAG_MOD_TYPE(ac->msg->elements[i].flags)
- != LDB_FLAG_MOD_DELETE)) {
- el = &ac->msg->elements[i];
- }
- if ((ldb_attr_cmp(ac->msg->elements[i].name,
- "sAMAccountName") == 0) &&
- (LDB_FLAG_MOD_TYPE(ac->msg->elements[i].flags)
- != LDB_FLAG_MOD_DELETE)) {
- el2 = &ac->msg->elements[i];
- }
- }
+ el = dsdb_get_single_valued_attr(ac->msg, "dNSHostName");
+ el2 = dsdb_get_single_valued_attr(ac->msg, "sAMAccountName");
if ((el == NULL) && (el2 == NULL)) {
/* we are not affected */
return LDB_SUCCESS;
diff --git a/source4/dsdb/samdb/ldb_modules/util.c b/source4/dsdb/samdb/ldb_modules/util.c
index e42bc7715e..7d6fcc47ad 100644
--- a/source4/dsdb/samdb/ldb_modules/util.c
+++ b/source4/dsdb/samdb/ldb_modules/util.c
@@ -1108,3 +1108,33 @@ void dsdb_req_chain_debug(struct ldb_request *req, int level)
DEBUG(level, ("%s\n", s));
talloc_free(s);
}
+
+/*
+ * Gets back a single-valued attribute by the rules of the DSDB triggers when
+ * performing a modify operation.
+ *
+ * In order that the constraint checking by the "objectclass_attrs" LDB module
+ * does work properly, the change request should remain similar or only be
+ * enhanced (no other modifications as deletions, variations).
+ */
+struct ldb_message_element *dsdb_get_single_valued_attr(struct ldb_message *msg,
+ const char *attr_name)
+{
+ struct ldb_message_element *el = NULL;
+ unsigned int i;
+
+ /* We've to walk over all modification entries and consider the last
+ * non-delete one which belongs to "attr_name".
+ *
+ * If "el" is NULL afterwards then that means there was no interesting
+ * change entry. */
+ for (i = 0; i < msg->num_elements; i++) {
+ if ((ldb_attr_cmp(msg->elements[i].name, attr_name) == 0) &&
+ (LDB_FLAG_MOD_TYPE(msg->elements[i].flags)
+ != LDB_FLAG_MOD_DELETE)) {
+ el = &msg->elements[i];
+ }
+ }
+
+ return el;
+}