r10753: don't require every ldb module to implement both a search_bytree() and

a search() function, instead each module now only implements the
bytree method, and the expression based search is handled generically
by the modules code. This makes for more consistency and less code
duplication.

fixed the tdb backend to handle BASE searches much more
efficiently. They now always only lookup one record, regardless of the
search expression
(This used to be commit 7e44f9153c5578624e2fca04cdc0a00af0fd9eb4)

3 files changed, 37 insertions, 18 deletions

diff --git a/source4/lib/ldb/common/ldb.c b/source4/lib/ldb/common/ldb.c
index a743b2f584..29ee323ad4 100644
--- a/source4/lib/ldb/common/ldb.c
+++ b/source4/lib/ldb/common/ldb.c
@@ -172,13 +172,23 @@ int ldb_search(struct ldb_context *ldb,
 	       const char *expression,
 	       const char * const *attrs, struct ldb_message ***res)
 {
-	ldb_reset_err_string(ldb);
+	struct ldb_parse_tree *tree;
+	int ret;
+
+	tree = ldb_parse_tree(ldb, expression);
+	if (tree == NULL) {
+		ldb_set_errstring(ldb->modules, talloc_strdup(ldb, "Unable to parse search expression"));
+		return -1;
+	}
+
+	ret = ldb_search_bytree(ldb, base, scope, tree, attrs, res);
+	talloc_free(tree);
 
-	return ldb->modules->ops->search(ldb->modules, base, scope, expression, attrs, res);
+	return ret;
 }
 
 /*
-  search the database given a LDAP-like search expression
+  search the database given a search tree
 
   return the number of records found, or -1 on error
 
diff --git a/source4/lib/ldb/common/ldb_modules.c b/source4/lib/ldb/common/ldb_modules.c
index 9c536789b9..2885d46b37 100644
--- a/source4/lib/ldb/common/ldb_modules.c
+++ b/source4/lib/ldb/common/ldb_modules.c
@@ -133,6 +133,7 @@ int ldb_load_modules(struct ldb_context *ldb, const char *options[])
 		{ "objectguid", objectguid_module_init },
 		{ "samldb", samldb_module_init },
 		{ "samba3sam", ldb_samba3sam_module_init },
+		{ "proxy", proxy_module_init },
 #endif
 		{ NULL, NULL }
 	};
@@ -170,7 +171,7 @@ int ldb_load_modules(struct ldb_context *ldb, const char *options[])
 				return -1;
 			}
 			if (ret > 1) {
-				ldb_debug(ldb, LDB_DEBUG_FATAL, "Too many records found, bailing out\n");
+				ldb_debug(ldb, LDB_DEBUG_FATAL, "Too many records found (%d), bailing out\n", ret);
 				talloc_free(msg);
 				return -1;
 			}
@@ -215,6 +216,17 @@ int ldb_load_modules(struct ldb_context *ldb, const char *options[])
 /*
    helper functions to call the next module in chain
 */
+int ldb_next_search_bytree(struct ldb_module *module, 
+			   const struct ldb_dn *base,
+			   enum ldb_scope scope,
+			   struct ldb_parse_tree *tree,
+			   const char * const *attrs, struct ldb_message ***res)
+{
+	if (!module->next) {
+		return -1;
+	}
+	return module->next->ops->search_bytree(module->next, base, scope, tree, attrs, res);
+}
 
 int ldb_next_search(struct ldb_module *module, 
 		    const struct ldb_dn *base,
@@ -222,24 +234,22 @@ int ldb_next_search(struct ldb_module *module,
 		    const char *expression,
 		    const char * const *attrs, struct ldb_message ***res)
 {
+	struct ldb_parse_tree *tree;
+	int ret;
 	if (!module->next) {
 		return -1;
 	}
-	return module->next->ops->search(module->next, base, scope, expression, attrs, res);
-}
-
-int ldb_next_search_bytree(struct ldb_module *module, 
-			   const struct ldb_dn *base,
-			   enum ldb_scope scope,
-			   struct ldb_parse_tree *tree,
-			   const char * const *attrs, struct ldb_message ***res)
-{
-	if (!module->next) {
+	tree = ldb_parse_tree(module, expression);
+	if (tree == NULL) {
+		ldb_set_errstring(module, talloc_strdup(module, "Unable to parse search expression"));
 		return -1;
 	}
-	return module->next->ops->search_bytree(module->next, base, scope, tree, attrs, res);
+	ret = module->next->ops->search_bytree(module->next, base, scope, tree, attrs, res);
+	talloc_free(tree);
+	return ret;
 }
 
+
 int ldb_next_add_record(struct ldb_module *module, const struct ldb_message *message)
 {
 	if (!module->next) {
diff --git a/source4/lib/ldb/common/ldb_parse.c b/source4/lib/ldb/common/ldb_parse.c
index f43d7a7c7a..95110bfd00 100644
--- a/source4/lib/ldb/common/ldb_parse.c
+++ b/source4/lib/ldb/common/ldb_parse.c
@@ -620,9 +620,8 @@ static struct ldb_parse_tree *ldb_parse_filter(void *mem_ctx, const char **s)
 */
 struct ldb_parse_tree *ldb_parse_tree(void *mem_ctx, const char *s)
 {
-	/* allowing NULL makes the _bytree() searches easier */
-	if (s == NULL) {
-		return NULL;
+	if (s == NULL || *s == 0) {
+		s = "(|(objectClass=*)(dn=*))";
 	}
 
 	while (isspace((unsigned char)*s)) s++;