r18866: Jeremy and Volker have given the go-ahead on the group mapping ldb

code. Yay!

This first commit copies lib/ldb/ from Samba4. A huge congratulations
should go to Simo on this - he has put an enormous amount of work into
ldb, and it's great to see it go into the Samba3 tree.
(This used to be commit bbedf2e34315f5c420a3a05dfe22b1d5cf79f042)

1 files changed, 825 insertions, 0 deletions

diff --git a/source3/lib/ldb/ldb_ildap/ldb_ildap.c b/source3/lib/ldb/ldb_ildap/ldb_ildap.c
new file mode 100644
index 0000000000..5b69ac06c9
--- /dev/null
+++ b/source3/lib/ldb/ldb_ildap/ldb_ildap.c
@@ -0,0 +1,825 @@
+/* 
+   ldb database library - ildap backend
+
+   Copyright (C) Andrew Tridgell  2005
+   Copyright (C) Simo Sorce       2006
+
+     ** 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_ildap
+ *
+ *  Component: ldb ildap backend
+ *
+ *  Description: This is a ldb backend for the internal ldap
+ *  client library in Samba4. By using this backend we are
+ *  independent of a system ldap library
+ *
+ *  Author: Andrew Tridgell
+ *
+ *  Modifications:
+ *
+ *  - description: make the module use asyncronous calls
+ *    date: Feb 2006
+ *    author: Simo Sorce
+ */
+
+
+#include "includes.h"
+#include "ldb/include/includes.h"
+
+#include "lib/events/events.h"
+#include "libcli/ldap/ldap.h"
+#include "libcli/ldap/ldap_client.h"
+#include "auth/auth.h"
+
+struct ildb_private {
+	struct ldap_connection *ldap;
+	struct ldb_context *ldb;
+};
+
+struct ildb_context {
+	struct ldb_module *module;
+	struct ldap_request *req;
+	void *context;
+	int (*callback)(struct ldb_context *, void *, struct ldb_reply *);
+};
+
+/*
+  convert a ldb_message structure to a list of ldap_mod structures
+  ready for ildap_add() or ildap_modify()
+*/
+static struct ldap_mod **ildb_msg_to_mods(void *mem_ctx, int *num_mods,
+					  const struct ldb_message *msg, int use_flags)
+{
+	struct ldap_mod **mods;
+	unsigned int i;
+	int n = 0;
+
+	/* allocate maximum number of elements needed */
+	mods = talloc_array(mem_ctx, struct ldap_mod *, msg->num_elements+1);
+	if (!mods) {
+		errno = ENOMEM;
+		return NULL;
+	}
+	mods[0] = NULL;
+
+	for (i = 0; i < msg->num_elements; i++) {
+		const struct ldb_message_element *el = &msg->elements[i];
+
+		mods[n] = talloc(mods, struct ldap_mod);
+		if (!mods[n]) {
+			goto failed;
+		}
+		mods[n + 1] = NULL;
+		mods[n]->type = 0;
+		mods[n]->attrib = *el;
+		if (use_flags) {
+			switch (el->flags & LDB_FLAG_MOD_MASK) {
+			case LDB_FLAG_MOD_ADD:
+				mods[n]->type = LDAP_MODIFY_ADD;
+				break;
+			case LDB_FLAG_MOD_DELETE:
+				mods[n]->type = LDAP_MODIFY_DELETE;
+				break;
+			case LDB_FLAG_MOD_REPLACE:
+				mods[n]->type = LDAP_MODIFY_REPLACE;
+				break;
+			}
+		}
+		n++;
+	}
+
+	*num_mods = n;
+	return mods;
+
+failed:
+	talloc_free(mods);
+	return NULL;
+}
+
+
+/*
+  map an ildap NTSTATUS to a ldb error code
+*/
+static int ildb_map_error(struct ildb_private *ildb, NTSTATUS status)
+{
+	if (NT_STATUS_IS_OK(status)) {
+		return LDB_SUCCESS;
+	}
+	ldb_set_errstring(ildb->ldb, ldap_errstr(ildb->ldap, status));
+	if (NT_STATUS_IS_LDAP(status)) {
+		return NT_STATUS_LDAP_CODE(status);
+	}
+	return LDB_ERR_OPERATIONS_ERROR;
+}
+
+static void ildb_request_timeout(struct event_context *ev, struct timed_event *te,
+				 struct timeval t, void *private_data)
+{
+	struct ldb_handle *handle = talloc_get_type(private_data, struct ldb_handle);
+	struct ildb_context *ac = talloc_get_type(handle->private_data, struct ildb_context);
+
+	if (ac->req->state == LDAP_REQUEST_PENDING) {
+		DLIST_REMOVE(ac->req->conn->pending, ac->req);
+	}
+
+	handle->status = LDB_ERR_TIME_LIMIT_EXCEEDED;
+
+	return;
+}
+
+static void ildb_callback(struct ldap_request *req)
+{
+	struct ldb_handle *handle = talloc_get_type(req->async.private_data, struct ldb_handle);
+	struct ildb_context *ac = talloc_get_type(handle->private_data, struct ildb_context);
+	struct ildb_private *ildb = talloc_get_type(ac->module->private_data, struct ildb_private);
+	NTSTATUS status;
+	int i;
+
+	handle->status = LDB_SUCCESS;
+
+	if (!NT_STATUS_IS_OK(req->status)) {
+		handle->status = ildb_map_error(ildb, req->status);
+		return;
+	}
+
+	if (req->num_replies < 1) {
+		handle->status = LDB_ERR_OPERATIONS_ERROR;
+		return;
+	} 
+		
+	switch (req->type) {
+
+	case LDAP_TAG_ModifyRequest:
+		if (req->replies[0]->type != LDAP_TAG_ModifyResponse) {
+			handle->status = LDB_ERR_PROTOCOL_ERROR;
+			return;
+		}
+		status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
+		handle->status = ildb_map_error(ildb, status);
+		if (ac->callback && handle->status == LDB_SUCCESS) {
+			/* FIXME: build a corresponding ares to pass on */
+			handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
+		}
+		handle->state = LDB_ASYNC_DONE;
+		break;
+
+	case LDAP_TAG_AddRequest:
+		if (req->replies[0]->type != LDAP_TAG_AddResponse) {
+			handle->status = LDB_ERR_PROTOCOL_ERROR;
+			return;
+		}
+		status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
+		handle->status = ildb_map_error(ildb, status);
+		if (ac->callback && handle->status == LDB_SUCCESS) {
+			/* FIXME: build a corresponding ares to pass on */
+			handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
+		}
+		handle->state = LDB_ASYNC_DONE;
+		break;
+
+	case LDAP_TAG_DelRequest:
+		if (req->replies[0]->type != LDAP_TAG_DelResponse) {
+			handle->status = LDB_ERR_PROTOCOL_ERROR;
+			return;
+		}
+		status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
+		handle->status = ildb_map_error(ildb, status);
+		if (ac->callback && handle->status == LDB_SUCCESS) {
+			/* FIXME: build a corresponding ares to pass on */
+			handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
+		}
+		handle->state = LDB_ASYNC_DONE;
+		break;
+
+	case LDAP_TAG_ModifyDNRequest:
+		if (req->replies[0]->type != LDAP_TAG_ModifyDNResponse) {
+			handle->status = LDB_ERR_PROTOCOL_ERROR;
+			return;
+		}
+		status = ldap_check_response(req->conn, &req->replies[0]->r.GeneralResult);
+		handle->status = ildb_map_error(ildb, status);
+		if (ac->callback && handle->status == LDB_SUCCESS) {
+			/* FIXME: build a corresponding ares to pass on */
+			handle->status = ac->callback(ac->module->ldb, ac->context, NULL);
+		}
+		handle->state = LDB_ASYNC_DONE;
+		break;
+
+	case LDAP_TAG_SearchRequest:
+		/* loop over all messages */
+		for (i = 0; i < req->num_replies; i++) {
+			struct ldap_SearchResEntry *search;
+			struct ldb_reply *ares = NULL;
+			struct ldap_message *msg;
+			int ret;
+
+			ares = talloc_zero(ac, struct ldb_reply);
+			if (!ares) {
+				handle->status = LDB_ERR_OPERATIONS_ERROR;
+				return;
+			}
+
+			msg = req->replies[i];
+			switch (msg->type) {
+
+			case LDAP_TAG_SearchResultDone:
+
+				status = ldap_check_response(req->conn, &msg->r.GeneralResult);
+				if (!NT_STATUS_IS_OK(status)) {
+					handle->status = ildb_map_error(ildb, status);
+					return;
+				}
+				
+				ares->controls = talloc_move(ares, &msg->controls);
+				if (msg->r.SearchResultDone.resultcode) {
+					if (msg->r.SearchResultDone.errormessage) {
+						ldb_set_errstring(ac->module->ldb, msg->r.SearchResultDone.errormessage);
+					}
+				}
+
+				handle->status = msg->r.SearchResultDone.resultcode;
+				handle->state = LDB_ASYNC_DONE;
+				ares->type = LDB_REPLY_DONE;
+				break;
+
+			case LDAP_TAG_SearchResultEntry:
+
+
+				ares->message = ldb_msg_new(ares);
+				if (!ares->message) {
+					handle->status = LDB_ERR_OPERATIONS_ERROR;
+					return;
+				}
+
+				search = &(msg->r.SearchResultEntry);
+		
+				ares->message->dn = ldb_dn_explode_or_special(ares->message, search->dn);
+				if (ares->message->dn == NULL) {
+					handle->status = LDB_ERR_OPERATIONS_ERROR;
+					return;
+				}
+				ares->message->num_elements = search->num_attributes;
+				ares->message->elements = talloc_move(ares->message,
+								      &search->attributes);
+
+				handle->status = LDB_SUCCESS;
+				handle->state = LDB_ASYNC_PENDING;
+				ares->type = LDB_REPLY_ENTRY;
+				break;
+
+			case LDAP_TAG_SearchResultReference:
+
+				ares->referral = talloc_strdup(ares, msg->r.SearchResultReference.referral);
+				
+				handle->status = LDB_SUCCESS;
+				handle->state = LDB_ASYNC_PENDING;
+				ares->type = LDB_REPLY_REFERRAL;
+				break;
+
+			default:
+				/* TAG not handled, fail ! */
+				handle->status = LDB_ERR_PROTOCOL_ERROR;
+				return;
+			}
+
+			ret = ac->callback(ac->module->ldb, ac->context, ares);
+			if (ret) {
+				handle->status = ret;
+			}
+		}
+
+		talloc_free(req->replies);
+		req->replies = NULL;
+		req->num_replies = 0;
+
+		break;
+		
+	default:
+		handle->status = LDB_ERR_PROTOCOL_ERROR;
+		return;
+	}
+}
+
+static struct ldb_handle *init_ildb_handle(struct ldb_module *module, 
+					   void *context,
+					   int (*callback)(struct ldb_context *, void *, struct ldb_reply *))
+{
+	struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
+	struct ildb_context *ildb_ac;
+	struct ldb_handle *h;
+
+	h = talloc_zero(ildb->ldap, struct ldb_handle);
+	if (h == NULL) {
+		ldb_set_errstring(module->ldb, "Out of Memory");
+		return NULL;
+	}
+
+	h->module = module;
+
+	ildb_ac = talloc(h, struct ildb_context);
+	if (ildb_ac == NULL) {
+		ldb_set_errstring(module->ldb, "Out of Memory");
+		talloc_free(h);
+		return NULL;
+	}
+
+	h->private_data = (void *)ildb_ac;
+
+	h->state = LDB_ASYNC_INIT;
+	h->status = LDB_SUCCESS;
+
+	ildb_ac->module = module;
+	ildb_ac->context = context;
+	ildb_ac->callback = callback;
+
+	return h;
+}
+
+static int ildb_request_send(struct ldb_module *module, struct ldap_message *msg,
+			     void *context,
+			     int (*callback)(struct ldb_context *, void *, struct ldb_reply *),
+			     int timeout,
+			     struct ldb_handle **handle)
+{
+	struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
+	struct ldb_handle *h = init_ildb_handle(module, context, callback);
+	struct ildb_context *ildb_ac;
+	struct ldap_request *req;
+
+	if (!h) {
+		return LDB_ERR_OPERATIONS_ERROR;		
+	}
+
+	ildb_ac = talloc_get_type(h->private_data, struct ildb_context);
+
+	req = ldap_request_send(ildb->ldap, msg);
+	if (req == NULL) {
+		ldb_set_errstring(module->ldb, "async send request failed");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	if (!req->conn) {
+		ldb_set_errstring(module->ldb, "connection to remote LDAP server dropped?");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	talloc_free(req->time_event);
+	req->time_event = NULL;
+	if (timeout) {
+		req->time_event = event_add_timed(req->conn->event.event_ctx, h, 
+						  timeval_current_ofs(timeout, 0),
+						  ildb_request_timeout, h);
+	}
+
+	req->async.fn = ildb_callback;
+	req->async.private_data = (void *)h;
+	ildb_ac->req = talloc_move(ildb_ac, &req);
+
+	*handle = h;
+	return LDB_SUCCESS;
+}
+
+static int ildb_request_noop(struct ldb_module *module, struct ldb_request *req) 
+{
+	struct ldb_handle *h = init_ildb_handle(module, req->context, req->callback);
+	struct ildb_context *ildb_ac;
+	int ret = LDB_SUCCESS;
+
+	if (!h) {
+		return LDB_ERR_OPERATIONS_ERROR;		
+	}
+
+	ildb_ac = talloc_get_type(h->private_data, struct ildb_context);
+	
+	req->handle = h;
+
+	if (ildb_ac->callback) {
+		ret = ildb_ac->callback(module->ldb, ildb_ac->context, NULL);
+	}
+	req->handle->state = LDB_ASYNC_DONE;
+	return ret;
+}
+
+/*
+  search for matching records using an asynchronous function
+ */
+static int ildb_search(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
+	struct ldap_message *msg;
+	int n;
+
+	req->handle = NULL;
+
+	if (!req->callback || !req->context) {
+		ldb_set_errstring(module->ldb, "Async interface called with NULL callback function or NULL context");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	
+	if (req->op.search.tree == NULL) {
+		ldb_set_errstring(module->ldb, "Invalid expression parse tree");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg = new_ldap_message(ildb);
+	if (msg == NULL) {
+		ldb_set_errstring(module->ldb, "Out of Memory");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_SearchRequest;
+
+	if (req->op.search.base == NULL) {
+		msg->r.SearchRequest.basedn = talloc_strdup(msg, "");
+	} else {
+		msg->r.SearchRequest.basedn  = ldb_dn_linearize(msg, req->op.search.base);
+	}
+	if (msg->r.SearchRequest.basedn == NULL) {
+		ldb_set_errstring(module->ldb, "Unable to determine baseDN");
+		talloc_free(msg);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	if (req->op.search.scope == LDB_SCOPE_DEFAULT) {
+		msg->r.SearchRequest.scope = LDB_SCOPE_SUBTREE;
+	} else {
+		msg->r.SearchRequest.scope = req->op.search.scope;
+	}
+	
+	msg->r.SearchRequest.deref  = LDAP_DEREFERENCE_NEVER;
+	msg->r.SearchRequest.timelimit = 0;
+	msg->r.SearchRequest.sizelimit = 0;
+	msg->r.SearchRequest.attributesonly = 0;
+	msg->r.SearchRequest.tree = discard_const(req->op.search.tree);
+	
+	for (n = 0; req->op.search.attrs && req->op.search.attrs[n]; n++) /* noop */ ;
+	msg->r.SearchRequest.num_attributes = n;
+	msg->r.SearchRequest.attributes = discard_const(req->op.search.attrs);
+	msg->controls = req->controls;
+
+	return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
+}
+
+/*
+  add a record
+*/
+static int ildb_add(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
+	struct ldap_message *msg;
+	struct ldap_mod **mods;
+	int i,n;
+
+	req->handle = NULL;
+
+	/* ignore ltdb specials */
+	if (ldb_dn_is_special(req->op.add.message->dn)) {
+		return ildb_request_noop(module, req);
+	}
+
+	msg = new_ldap_message(ildb->ldap);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_AddRequest;
+
+	msg->r.AddRequest.dn = ldb_dn_linearize(msg, req->op.add.message->dn);
+	if (msg->r.AddRequest.dn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_INVALID_DN_SYNTAX;
+	}
+
+	mods = ildb_msg_to_mods(msg, &n, req->op.add.message, 0);
+	if (mods == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->r.AddRequest.num_attributes = n;
+	msg->r.AddRequest.attributes = talloc_array(msg, struct ldb_message_element, n);
+	if (msg->r.AddRequest.attributes == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	for (i = 0; i < n; i++) {
+		msg->r.AddRequest.attributes[i] = mods[i]->attrib;
+	}
+
+	return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
+}
+
+/*
+  modify a record
+*/
+static int ildb_modify(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
+	struct ldap_message *msg;
+	struct ldap_mod **mods;
+	int i,n;
+
+	req->handle = NULL;
+
+	/* ignore ltdb specials */
+	if (ldb_dn_is_special(req->op.mod.message->dn)) {
+		return ildb_request_noop(module, req);
+	}
+
+	msg = new_ldap_message(ildb->ldap);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_ModifyRequest;
+
+	msg->r.ModifyRequest.dn = ldb_dn_linearize(msg, req->op.mod.message->dn);
+	if (msg->r.ModifyRequest.dn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_INVALID_DN_SYNTAX;
+	}
+
+	mods = ildb_msg_to_mods(msg, &n, req->op.mod.message, 1);
+	if (mods == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->r.ModifyRequest.num_mods = n;
+	msg->r.ModifyRequest.mods = talloc_array(msg, struct ldap_mod, n);
+	if (msg->r.ModifyRequest.mods == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	for (i = 0; i < n; i++) {
+		msg->r.ModifyRequest.mods[i] = *mods[i];
+	}
+
+	return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
+}
+
+/*
+  delete a record
+*/
+static int ildb_delete(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
+	struct ldap_message *msg;
+
+	req->handle = NULL;
+
+	/* ignore ltdb specials */
+	if (ldb_dn_is_special(req->op.del.dn)) {
+		return ildb_request_noop(module, req);
+	}
+
+	msg = new_ldap_message(ildb->ldap);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_DelRequest;
+	
+	msg->r.DelRequest.dn = ldb_dn_linearize(msg, req->op.del.dn);
+	if (msg->r.DelRequest.dn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_INVALID_DN_SYNTAX;
+	}
+
+	return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
+}
+
+/*
+  rename a record
+*/
+static int ildb_rename(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ildb_private *ildb = talloc_get_type(module->private_data, struct ildb_private);
+	struct ldap_message *msg;
+
+	req->handle = NULL;
+
+	/* ignore ltdb specials */
+	if (ldb_dn_is_special(req->op.rename.olddn) || ldb_dn_is_special(req->op.rename.newdn)) {
+		return ildb_request_noop(module, req);
+	}
+
+	msg = new_ldap_message(ildb->ldap);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_ModifyDNRequest;
+	msg->r.ModifyDNRequest.dn = ldb_dn_linearize(msg, req->op.rename.olddn);
+	if (msg->r.ModifyDNRequest.dn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_INVALID_DN_SYNTAX;
+	}
+
+	msg->r.ModifyDNRequest.newrdn = 
+		talloc_asprintf(msg, "%s=%s",
+				req->op.rename.newdn->components[0].name,
+				ldb_dn_escape_value(msg, req->op.rename.newdn->components[0].value));
+	if (msg->r.ModifyDNRequest.newrdn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->r.ModifyDNRequest.newsuperior =
+		ldb_dn_linearize(msg,
+				 ldb_dn_get_parent(msg, req->op.rename.newdn));
+	if (msg->r.ModifyDNRequest.newsuperior == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_INVALID_DN_SYNTAX;
+	}
+
+	msg->r.ModifyDNRequest.deleteolddn = True;
+
+	return ildb_request_send(module, msg, req->context, req->callback, req->timeout, &(req->handle));
+}
+
+static int ildb_start_trans(struct ldb_module *module)
+{
+	/* TODO implement a local locking mechanism here */
+
+	return LDB_SUCCESS;
+}
+
+static int ildb_end_trans(struct ldb_module *module)
+{
+	/* TODO implement a local transaction mechanism here */
+
+	return LDB_SUCCESS;
+}
+
+static int ildb_del_trans(struct ldb_module *module)
+{
+	/* TODO implement a local locking mechanism here */
+
+	return LDB_SUCCESS;
+}
+
+static int ildb_request(struct ldb_module *module, struct ldb_request *req)
+{
+	return LDB_ERR_OPERATIONS_ERROR;
+}
+
+static int ildb_wait(struct ldb_handle *handle, enum ldb_wait_type type)
+{
+	struct ildb_context *ac = talloc_get_type(handle->private_data, struct ildb_context);
+
+	if (handle->state == LDB_ASYNC_DONE) {
+		return handle->status;
+	}
+
+	if (!ac) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	handle->state = LDB_ASYNC_INIT;
+
+	switch(type) {
+	case LDB_WAIT_NONE:
+		if (event_loop_once(ac->req->conn->event.event_ctx) != 0) {
+			return LDB_ERR_OTHER;
+		}
+		break;
+	case LDB_WAIT_ALL:
+		while (handle->status == LDB_SUCCESS && handle->state != LDB_ASYNC_DONE) {
+			if (event_loop_once(ac->req->conn->event.event_ctx) != 0) {
+				return LDB_ERR_OTHER;
+			}
+		}
+		break;
+	default:
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	
+	return handle->status;
+}
+
+static const struct ldb_module_ops ildb_ops = {
+	.name              = "ldap",
+	.search            = ildb_search,
+	.add               = ildb_add,
+	.modify            = ildb_modify,
+	.del               = ildb_delete,
+	.rename            = ildb_rename,
+	.request           = ildb_request,
+	.start_transaction = ildb_start_trans,
+	.end_transaction   = ildb_end_trans,
+	.del_transaction   = ildb_del_trans,
+	.wait              = ildb_wait
+};
+
+/*
+  connect to the database
+*/
+static int ildb_connect(struct ldb_context *ldb, const char *url, 
+			unsigned int flags, const char *options[],
+			struct ldb_module **module)
+{
+	struct ildb_private *ildb = NULL;
+	NTSTATUS status;
+	struct cli_credentials *creds;
+
+	ildb = talloc(ldb, struct ildb_private);
+	if (!ildb) {
+		ldb_oom(ldb);
+		goto failed;
+	}
+
+	ildb->ldb     = ldb;
+
+	ildb->ldap = ldap4_new_connection(ildb, ldb_get_opaque(ldb, "EventContext"));
+	if (!ildb->ldap) {
+		ldb_oom(ldb);
+		goto failed;
+	}
+
+	if (flags & LDB_FLG_RECONNECT) {
+		ldap_set_reconn_params(ildb->ldap, 10);
+	}
+
+	status = ldap_connect(ildb->ldap, url);
+	if (!NT_STATUS_IS_OK(status)) {
+		ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to connect to ldap URL '%s' - %s\n",
+			  url, ldap_errstr(ildb->ldap, status));
+		goto failed;
+	}
+
+
+	*module = talloc(ldb, struct ldb_module);
+	if (!module) {
+		ldb_oom(ldb);
+		talloc_free(ildb);
+		return -1;
+	}
+	(*module)->ldb = ldb;
+	(*module)->prev = (*module)->next = NULL;
+	(*module)->private_data = ildb;
+	(*module)->ops = &ildb_ops;
+
+	/* caller can optionally setup credentials using the opaque token 'credentials' */
+	creds = talloc_get_type(ldb_get_opaque(ldb, "credentials"), struct cli_credentials);
+	if (creds == NULL) {
+		struct auth_session_info *session_info = talloc_get_type(ldb_get_opaque(ldb, "sessionInfo"), struct auth_session_info);
+		if (session_info) {
+			creds = session_info->credentials;
+		}
+	}
+
+	if (creds != NULL && cli_credentials_authentication_requested(creds)) {
+		const char *bind_dn = cli_credentials_get_bind_dn(creds);
+		if (bind_dn) {
+			const char *password = cli_credentials_get_password(creds);
+			status = ldap_bind_simple(ildb->ldap, bind_dn, password);
+			if (!NT_STATUS_IS_OK(status)) {
+				ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to bind - %s\n",
+					  ldap_errstr(ildb->ldap, status));
+				goto failed;
+			}
+		} else {
+			status = ldap_bind_sasl(ildb->ldap, creds);
+			if (!NT_STATUS_IS_OK(status)) {
+				ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to bind - %s\n",
+					  ldap_errstr(ildb->ldap, status));
+				goto failed;
+			}
+		}
+	}
+
+	return 0;
+
+failed:
+	talloc_free(ildb);
+	return -1;
+}
+
+int ldb_ildap_init(void)
+{
+	return ldb_register_backend("ldap", ildb_connect) + 
+		   ldb_register_backend("ldapi", ildb_connect) + 
+		   ldb_register_backend("ldaps", ildb_connect);
+}