r8669: The objectguid module belongs in Samba's ldb module collection, not in

ldb, as it can't build without the NDR and GUID code.

Also make it properly use the NDR encoding for the GUID (I forgot last
time, and used a string), as well as set the dependencies on the
module correctly.

Andrew Bartlett
(This used to be commit 8054abc76e5e3588cebc7fc01062a1223b7f140b)

1 files changed, 224 insertions, 0 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/objectguid.c b/source4/dsdb/samdb/ldb_modules/objectguid.c
new file mode 100644
index 0000000000..45f1a10730
--- /dev/null
+++ b/source4/dsdb/samdb/ldb_modules/objectguid.c
@@ -0,0 +1,224 @@
+/* 
+   ldb database library
+
+   Copyright (C) Simo Sorce  2004
+
+     ** 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 2 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/*
+ *  Name: ldb
+ *
+ *  Component: ldb objectguid module
+ *
+ *  Description: add a unique objectGUID onto every new record
+ *
+ *  Author: Simo Sorce
+ */
+
+#include "includes.h"
+#include "ldb/include/ldb.h"
+#include "ldb/include/ldb_private.h"
+#include <time.h>
+
+struct private_data {
+	const char *error_string;
+};
+
+static int objectguid_search(struct ldb_module *module, const char *base,
+				  enum ldb_scope scope, const char *expression,
+				  const char * const *attrs, struct ldb_message ***res)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_search\n");
+	return ldb_next_search(module, base, scope, expression, attrs, res);
+}
+
+static int objectguid_search_bytree(struct ldb_module *module, const char *base,
+				    enum ldb_scope scope, struct ldb_parse_tree *tree,
+				    const char * const *attrs, struct ldb_message ***res)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_search\n");
+	return ldb_next_search_bytree(module, base, scope, tree, attrs, res);
+}
+
+static struct ldb_message_element *objectguid_find_attribute(const struct ldb_message *msg, const char *name)
+{
+	int i;
+
+	for (i = 0; i < msg->num_elements; i++) {
+		if (ldb_attr_cmp(name, msg->elements[i].name) == 0) {
+			return &msg->elements[i];
+		}
+	}
+
+	return NULL;
+}
+
+/* add_record: add crateTimestamp/modifyTimestamp attributes */
+static int objectguid_add_record(struct ldb_module *module, const struct ldb_message *msg)
+{
+	struct ldb_val v;
+	struct ldb_message *msg2;
+	struct ldb_message_element *attribute;
+	struct GUID guid;
+	NTSTATUS nt_status;
+	int ret, i;
+
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_add_record\n");
+
+	if (msg->dn[0] == '@') { /* do not manipulate our control entries */
+		return ldb_next_add_record(module, msg);
+	}
+
+	if ((attribute = objectguid_find_attribute(msg, "objectGUID")) != NULL ) {
+		return ldb_next_add_record(module, msg);
+	}
+
+	msg2 = talloc(module, struct ldb_message);
+	if (!msg2) {
+		return -1;
+	}
+
+	msg2->dn = msg->dn;
+	msg2->num_elements = msg->num_elements;
+	msg2->private_data = msg->private_data;
+	msg2->elements = talloc_array(msg2, struct ldb_message_element, msg2->num_elements);
+	for (i = 0; i < msg2->num_elements; i++) {
+		msg2->elements[i] = msg->elements[i];
+	}
+
+	/* a new GUID */
+	guid = GUID_random();
+
+	nt_status = ndr_push_struct_blob(&v, msg2, &guid, 
+					 (ndr_push_flags_fn_t)ndr_push_GUID);
+	if (!NT_STATUS_IS_OK(nt_status)) {
+		return -1;
+	}
+
+	ret = ldb_msg_add_value(module->ldb, msg2, "objectGUID", &v);
+	if (ret) {
+		return ret;
+	}
+
+	ret = ldb_next_add_record(module, msg2);
+	talloc_free(msg2);
+
+	return ret;
+}
+
+/* modify_record: change modifyTimestamp as well */
+static int objectguid_modify_record(struct ldb_module *module, const struct ldb_message *msg)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_modify_record\n");
+	return ldb_next_modify_record(module, msg);
+}
+
+static int objectguid_delete_record(struct ldb_module *module, const char *dn)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_delete_record\n");
+	return ldb_next_delete_record(module, dn);
+}
+
+static int objectguid_rename_record(struct ldb_module *module, const char *olddn, const char *newdn)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_rename_record\n");
+	return ldb_next_rename_record(module, olddn, newdn);
+}
+
+static int objectguid_lock(struct ldb_module *module, const char *lockname)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_lock\n");
+	return ldb_next_named_lock(module, lockname);
+}
+
+static int objectguid_unlock(struct ldb_module *module, const char *lockname)
+{
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_unlock\n");
+	return ldb_next_named_unlock(module, lockname);
+}
+
+/* return extended error information */
+static const char *objectguid_errstring(struct ldb_module *module)
+{
+	struct private_data *data = (struct private_data *)module->private_data;
+
+	ldb_debug(module->ldb, LDB_DEBUG_TRACE, "objectguid_errstring\n");
+	if (data->error_string) {
+		const char *error;
+
+		error = data->error_string;
+		data->error_string = NULL;
+		return error;
+	}
+
+	return ldb_next_errstring(module);
+}
+
+static int objectguid_destructor(void *module_ctx)
+{
+	/* struct ldb_module *ctx = module_ctx; */
+	/* put your clean-up functions here */
+	return 0;
+}
+
+static const struct ldb_module_ops objectguid_ops = {
+	.name          = "objectguid",
+	.search        = objectguid_search,
+	.search_bytree = objectguid_search_bytree,
+	.add_record    = objectguid_add_record,
+	.modify_record = objectguid_modify_record,
+	.delete_record = objectguid_delete_record,
+	.rename_record = objectguid_rename_record,
+	.named_lock    = objectguid_lock,
+	.named_unlock  = objectguid_unlock,
+	.errstring     = objectguid_errstring
+};
+
+
+/* the init function */
+#ifdef HAVE_DLOPEN_DISABLED
+ struct ldb_module *init_module(struct ldb_context *ldb, const char *options[])
+#else
+struct ldb_module *objectguid_module_init(struct ldb_context *ldb, const char *options[])
+#endif
+{
+	struct ldb_module *ctx;
+	struct private_data *data;
+
+	ctx = talloc(ldb, struct ldb_module);
+	if (!ctx)
+		return NULL;
+
+	data = talloc(ctx, struct private_data);
+	if (!data) {
+		talloc_free(ctx);
+		return NULL;
+	}
+
+	data->error_string = NULL;
+	ctx->private_data = data;
+	ctx->ldb = ldb;
+	ctx->prev = ctx->next = NULL;
+	ctx->ops = &objectguid_ops;
+
+	talloc_set_destructor (ctx, objectguid_destructor);
+
+	return ctx;
+}