ldb: make ldb a top level library for Samba 4.0

Signed-off-by: Andrew Tridgell <tridge@samba.org>

1 files changed, 879 insertions, 0 deletions

diff --git a/lib/ldb-samba/ldb_ildap.c b/lib/ldb-samba/ldb_ildap.c
new file mode 100644
index 0000000000..3c28690bd6
--- /dev/null
+++ b/lib/ldb-samba/ldb_ildap.c
@@ -0,0 +1,879 @@
+/*
+   ldb database library - ildap backend
+
+   Copyright (C) Andrew Tridgell  2005
+   Copyright (C) Simo Sorce       2008
+
+     ** 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ *  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 asynchronous calls
+ *    date: Feb 2006
+ *    author: Simo Sorce
+ */
+
+#include "includes.h"
+#include "ldb_module.h"
+#include "util/dlinklist.h"
+
+#include "libcli/ldap/libcli_ldap.h"
+#include "libcli/ldap/ldap_client.h"
+#include "auth/auth.h"
+#include "auth/credentials/credentials.h"
+
+struct ildb_private {
+	struct ldap_connection *ldap;
+	struct tevent_context *event_ctx;
+};
+
+struct ildb_context {
+	struct ldb_module *module;
+	struct ldb_request *req;
+
+	struct ildb_private *ildb;
+	struct ldap_request *ireq;
+
+	/* indicate we are already processing
+	 * the ldap_request in ildb_callback() */
+	bool in_ildb_callback;
+
+	bool done;
+
+	struct ildb_destructor_ctx *dc;
+};
+
+static void ildb_request_done(struct ildb_context *ctx,
+			      struct ldb_control **ctrls, int error)
+{
+	struct ldb_context *ldb;
+	struct ldb_reply *ares;
+
+	ldb = ldb_module_get_ctx(ctx->module);
+
+	ctx->done = true;
+
+	if (ctx->req == NULL) {
+		/* if the req has been freed already just return */
+		return;
+	}
+
+	ares = talloc_zero(ctx->req, struct ldb_reply);
+	if (!ares) {
+		ldb_oom(ldb);
+		ctx->req->callback(ctx->req, NULL);
+		return;
+	}
+	ares->type = LDB_REPLY_DONE;
+	ares->controls = talloc_steal(ares, ctrls);
+	ares->error = error;
+
+	ctx->req->callback(ctx->req, ares);
+}
+
+static void ildb_auto_done_callback(struct tevent_context *ev,
+				    struct tevent_timer *te,
+				    struct timeval t,
+				    void *private_data)
+{
+	struct ildb_context *ac;
+
+	ac = talloc_get_type(private_data, struct ildb_context);
+	ildb_request_done(ac, NULL, LDB_SUCCESS);
+}
+
+/*
+  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 ldb_module *module, NTSTATUS status)
+{
+	struct ildb_private *ildb;
+	struct ldb_context *ldb;
+	TALLOC_CTX *mem_ctx;
+
+	ildb = talloc_get_type(ldb_module_get_private(module), struct ildb_private);
+	ldb = ldb_module_get_ctx(module);
+
+	if (NT_STATUS_IS_OK(status)) {
+		return LDB_SUCCESS;
+	}
+
+	mem_ctx = talloc_new(ildb);
+	if (!mem_ctx) {
+		ldb_oom(ldb);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	ldb_set_errstring(ldb,
+			  ldap_errstr(ildb->ldap, mem_ctx, status));
+	talloc_free(mem_ctx);
+	if (NT_STATUS_IS_LDAP(status)) {
+		return NT_STATUS_LDAP_CODE(status);
+	}
+	return LDB_ERR_OPERATIONS_ERROR;
+}
+
+static void ildb_request_timeout(struct tevent_context *ev, struct tevent_timer *te,
+				 struct timeval t, void *private_data)
+{
+	struct ildb_context *ac = talloc_get_type(private_data, struct ildb_context);
+
+	if (ac->ireq->state == LDAP_REQUEST_PENDING) {
+		DLIST_REMOVE(ac->ireq->conn->pending, ac->ireq);
+	}
+
+	ildb_request_done(ac, NULL, LDB_ERR_TIME_LIMIT_EXCEEDED);
+}
+
+static void ildb_callback(struct ldap_request *req)
+{
+	struct ldb_context *ldb;
+	struct ildb_context *ac;
+	NTSTATUS status;
+	struct ldap_SearchResEntry *search;
+	struct ldap_message *msg;
+	struct ldb_control **controls;
+	struct ldb_message *ldbmsg;
+	char *referral;
+	bool callback_failed;
+	bool request_done;
+	int ret;
+	int i;
+
+	ac = talloc_get_type(req->async.private_data, struct ildb_context);
+	ldb = ldb_module_get_ctx(ac->module);
+	callback_failed = false;
+	request_done = false;
+	controls = NULL;
+
+	/* check if we are already processing this request */
+	if (ac->in_ildb_callback) {
+		return;
+	}
+	/* mark the request as being in process */
+	ac->in_ildb_callback = true;
+
+	if (!NT_STATUS_IS_OK(req->status)) {
+		ret = ildb_map_error(ac->module, req->status);
+		ildb_request_done(ac, NULL, ret);
+		return;
+	}
+
+	if (req->num_replies < 1) {
+		ret = LDB_ERR_OPERATIONS_ERROR;
+		ildb_request_done(ac, NULL, ret);
+		return;
+	}
+
+	switch (req->type) {
+
+	case LDAP_TAG_ModifyRequest:
+		if (req->replies[0]->type != LDAP_TAG_ModifyResponse) {
+			ret = LDB_ERR_PROTOCOL_ERROR;
+			break;
+		}
+		status = ldap_check_response(ac->ireq->conn, &req->replies[0]->r.GeneralResult);
+		ret = ildb_map_error(ac->module, status);
+		request_done = true;
+		break;
+
+	case LDAP_TAG_AddRequest:
+		if (req->replies[0]->type != LDAP_TAG_AddResponse) {
+			ret = LDB_ERR_PROTOCOL_ERROR;
+			return;
+		}
+		status = ldap_check_response(ac->ireq->conn, &req->replies[0]->r.GeneralResult);
+		ret = ildb_map_error(ac->module, status);
+		request_done = true;
+		break;
+
+	case LDAP_TAG_DelRequest:
+		if (req->replies[0]->type != LDAP_TAG_DelResponse) {
+			ret = LDB_ERR_PROTOCOL_ERROR;
+			return;
+		}
+		status = ldap_check_response(ac->ireq->conn, &req->replies[0]->r.GeneralResult);
+		ret = ildb_map_error(ac->module, status);
+		request_done = true;
+		break;
+
+	case LDAP_TAG_ModifyDNRequest:
+		if (req->replies[0]->type != LDAP_TAG_ModifyDNResponse) {
+			ret = LDB_ERR_PROTOCOL_ERROR;
+			return;
+		}
+		status = ldap_check_response(ac->ireq->conn, &req->replies[0]->r.GeneralResult);
+		ret = ildb_map_error(ac->module, status);
+		request_done = true;
+		break;
+
+	case LDAP_TAG_SearchRequest:
+		/* loop over all messages */
+		for (i = 0; i < req->num_replies; i++) {
+
+			msg = req->replies[i];
+			switch (msg->type) {
+
+			case LDAP_TAG_SearchResultDone:
+
+				status = ldap_check_response(ac->ireq->conn, &msg->r.GeneralResult);
+				if (!NT_STATUS_IS_OK(status)) {
+					ret = ildb_map_error(ac->module, status);
+					break;
+				}
+
+				controls = talloc_steal(ac, msg->controls);
+				if (msg->r.SearchResultDone.resultcode) {
+					if (msg->r.SearchResultDone.errormessage) {
+						ldb_set_errstring(ldb, msg->r.SearchResultDone.errormessage);
+					}
+				}
+
+				ret = msg->r.SearchResultDone.resultcode;
+				request_done = true;
+				break;
+
+			case LDAP_TAG_SearchResultEntry:
+
+				ldbmsg = ldb_msg_new(ac);
+				if (!ldbmsg) {
+					ret = LDB_ERR_OPERATIONS_ERROR;
+					break;
+				}
+
+				search = &(msg->r.SearchResultEntry);
+
+				ldbmsg->dn = ldb_dn_new(ldbmsg, ldb, search->dn);
+				if ( ! ldb_dn_validate(ldbmsg->dn)) {
+					ret = LDB_ERR_OPERATIONS_ERROR;
+					break;
+				}
+				ldbmsg->num_elements = search->num_attributes;
+				ldbmsg->elements = talloc_move(ldbmsg, &search->attributes);
+
+				controls = talloc_steal(ac, msg->controls);
+
+				ret = ldb_module_send_entry(ac->req, ldbmsg, controls);
+				if (ret != LDB_SUCCESS) {
+					callback_failed = true;
+				}
+
+				break;
+
+			case LDAP_TAG_SearchResultReference:
+
+				referral = talloc_strdup(ac, msg->r.SearchResultReference.referral);
+
+				ret = ldb_module_send_referral(ac->req, referral);
+				if (ret != LDB_SUCCESS) {
+					callback_failed = true;
+				}
+
+				break;
+
+			default:
+				/* TAG not handled, fail ! */
+				ret = LDB_ERR_PROTOCOL_ERROR;
+				break;
+			}
+
+			if (ret != LDB_SUCCESS) {
+				break;
+			}
+		}
+
+		talloc_free(req->replies);
+		req->replies = NULL;
+		req->num_replies = 0;
+
+		break;
+
+	default:
+		ret = LDB_ERR_PROTOCOL_ERROR;
+		break;
+	}
+
+	if (ret != LDB_SUCCESS) {
+
+		/* if the callback failed the caller will have freed the
+		 * request. Just return and don't try to use it */
+		if ( ! callback_failed) {
+			request_done = true;
+		}
+	}
+
+	/* mark the request as not being in progress */
+	ac->in_ildb_callback = false;
+
+	if (request_done) {
+		ildb_request_done(ac, controls, ret);
+	}
+
+	return;
+}
+
+static int ildb_request_send(struct ildb_context *ac, struct ldap_message *msg)
+{
+	struct ldb_context *ldb;
+	struct ldap_request *req;
+
+	if (!ac) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ldb = ldb_module_get_ctx(ac->module);
+
+	ldb_request_set_state(ac->req, LDB_ASYNC_PENDING);
+
+	req = ldap_request_send(ac->ildb->ldap, msg);
+	if (req == NULL) {
+		ldb_set_errstring(ldb, "async send request failed");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+	ac->ireq = talloc_reparent(ac->ildb->ldap, ac, req);
+
+	if (!ac->ireq->conn) {
+		ldb_set_errstring(ldb, "connection to remote LDAP server dropped?");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	talloc_free(req->time_event);
+	req->time_event = NULL;
+	if (ac->req->timeout) {
+		req->time_event = tevent_add_timer(ac->ildb->event_ctx, ac,
+						   timeval_current_ofs(ac->req->timeout, 0),
+						   ildb_request_timeout, ac);
+	}
+
+	req->async.fn = ildb_callback;
+	req->async.private_data = ac;
+
+	return LDB_SUCCESS;
+}
+
+/*
+  search for matching records using an asynchronous function
+ */
+static int ildb_search(struct ildb_context *ac)
+{
+	struct ldb_context *ldb;
+	struct ldb_request *req = ac->req;
+	struct ldap_message *msg;
+	int n;
+
+	ldb = ldb_module_get_ctx(ac->module);
+
+	if (!req->callback || !req->context) {
+		ldb_set_errstring(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(ldb, "Invalid expression parse tree");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg = new_ldap_message(req);
+	if (msg == NULL) {
+		ldb_set_errstring(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_get_extended_linearized(msg, req->op.search.base, 0);
+	}
+	if (msg->r.SearchRequest.basedn == NULL) {
+		ldb_set_errstring(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 = req->op.search.attrs;
+	msg->controls = req->controls;
+
+	return ildb_request_send(ac, msg);
+}
+
+/*
+  add a record
+*/
+static int ildb_add(struct ildb_context *ac)
+{
+	struct ldb_request *req = ac->req;
+	struct ldap_message *msg;
+	struct ldap_mod **mods;
+	int i,n;
+
+	msg = new_ldap_message(req);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_AddRequest;
+
+	msg->r.AddRequest.dn = ldb_dn_get_extended_linearized(msg, req->op.add.message->dn, 0);
+	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;
+	}
+	msg->controls = req->controls;
+
+	return ildb_request_send(ac, msg);
+}
+
+/*
+  modify a record
+*/
+static int ildb_modify(struct ildb_context *ac)
+{
+	struct ldb_request *req = ac->req;
+	struct ldap_message *msg;
+	struct ldap_mod **mods;
+	int i,n;
+
+	msg = new_ldap_message(req);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_ModifyRequest;
+
+	msg->r.ModifyRequest.dn = ldb_dn_get_extended_linearized(msg, req->op.mod.message->dn, 0);
+	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];
+	}
+	msg->controls = req->controls;
+	return ildb_request_send(ac, msg);
+}
+
+/*
+  delete a record
+*/
+static int ildb_delete(struct ildb_context *ac)
+{
+	struct ldb_request *req = ac->req;
+	struct ldap_message *msg;
+
+	msg = new_ldap_message(req);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_DelRequest;
+
+	msg->r.DelRequest.dn = ldb_dn_get_extended_linearized(msg, req->op.del.dn, 0);
+	if (msg->r.DelRequest.dn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_INVALID_DN_SYNTAX;
+	}
+	msg->controls = req->controls;
+
+	return ildb_request_send(ac, msg);
+}
+
+/*
+  rename a record
+*/
+static int ildb_rename(struct ildb_context *ac)
+{
+	struct ldb_request *req = ac->req;
+	struct ldap_message *msg;
+	const char *rdn_name;
+	const struct ldb_val *rdn_val;
+
+	msg = new_ldap_message(req);
+	if (msg == NULL) {
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->type = LDAP_TAG_ModifyDNRequest;
+	msg->r.ModifyDNRequest.dn = ldb_dn_get_extended_linearized(msg, req->op.rename.olddn, 0);
+	if (msg->r.ModifyDNRequest.dn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_INVALID_DN_SYNTAX;
+	}
+
+	rdn_name = ldb_dn_get_rdn_name(req->op.rename.newdn);
+	rdn_val = ldb_dn_get_rdn_val(req->op.rename.newdn);
+
+	if ((rdn_name != NULL) && (rdn_val != NULL)) {
+		msg->r.ModifyDNRequest.newrdn =
+			talloc_asprintf(msg, "%s=%s", rdn_name,
+					rdn_val->length > 0 ? ldb_dn_escape_value(msg, *rdn_val) : "");
+	} else {
+		msg->r.ModifyDNRequest.newrdn = talloc_strdup(msg, "");
+	}
+	if (msg->r.ModifyDNRequest.newrdn == NULL) {
+		talloc_free(msg);
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	msg->r.ModifyDNRequest.newsuperior =
+		ldb_dn_alloc_linearized(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;
+	msg->controls = req->controls;
+
+	return ildb_request_send(ac, msg);
+}
+
+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 bool ildb_dn_is_special(struct ldb_request *req)
+{
+	struct ldb_dn *dn = NULL;
+
+	switch (req->operation) {
+	case LDB_ADD:
+		dn = req->op.add.message->dn;
+		break;
+	case LDB_MODIFY:
+		dn = req->op.mod.message->dn;
+		break;
+	case LDB_DELETE:
+		dn = req->op.del.dn;
+		break;
+	case LDB_RENAME:
+		dn = req->op.rename.olddn;
+		break;
+	default:
+		break;
+	}
+
+	if (dn && ldb_dn_is_special(dn)) {
+		return true;
+	}
+	return false;
+}
+
+static int ildb_handle_request(struct ldb_module *module, struct ldb_request *req)
+{
+	struct ldb_context *ldb;
+	struct ildb_private *ildb;
+	struct ildb_context *ac;
+	struct tevent_timer *te;
+	int ret;
+
+	ildb = talloc_get_type(ldb_module_get_private(module), struct ildb_private);
+	ldb = ldb_module_get_ctx(module);
+
+	if (req->starttime == 0 || req->timeout == 0) {
+		ldb_set_errstring(ldb, "Invalid timeout settings");
+		return LDB_ERR_TIME_LIMIT_EXCEEDED;
+	}
+
+	ac = talloc_zero(req, struct ildb_context);
+	if (ac == NULL) {
+		ldb_set_errstring(ldb, "Out of Memory");
+		return LDB_ERR_OPERATIONS_ERROR;
+	}
+
+	ac->module = module;
+	ac->req = req;
+	ac->ildb = ildb;
+
+	if (ildb_dn_is_special(req)) {
+
+		te = tevent_add_timer(ac->ildb->event_ctx,
+				      ac, timeval_zero(),
+				      ildb_auto_done_callback, ac);
+		if (NULL == te) {
+			return LDB_ERR_OPERATIONS_ERROR;
+		}
+
+		return LDB_SUCCESS;
+	}
+
+	switch (ac->req->operation) {
+	case LDB_SEARCH:
+		ret = ildb_search(ac);
+		break;
+	case LDB_ADD:
+		ret = ildb_add(ac);
+		break;
+	case LDB_MODIFY:
+		ret = ildb_modify(ac);
+		break;
+	case LDB_DELETE:
+		ret = ildb_delete(ac);
+		break;
+	case LDB_RENAME:
+		ret = ildb_rename(ac);
+		break;
+	default:
+		/* no other op supported */
+		ret = LDB_ERR_PROTOCOL_ERROR;
+		break;
+	}
+
+	return ret;
+}
+
+static const struct ldb_module_ops ildb_ops = {
+	.name              = "ldap",
+	.search            = ildb_handle_request,
+	.add               = ildb_handle_request,
+	.modify            = ildb_handle_request,
+	.del               = ildb_handle_request,
+	.rename            = ildb_handle_request,
+/*	.request           = ildb_handle_request, */
+	.start_transaction = ildb_start_trans,
+	.end_transaction   = ildb_end_trans,
+	.del_transaction   = ildb_del_trans,
+};
+
+/*
+  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 ldb_module *module;
+	struct ildb_private *ildb;
+	NTSTATUS status;
+	struct cli_credentials *creds;
+	struct loadparm_context *lp_ctx;
+
+	module = ldb_module_new(ldb, ldb, "ldb_ildap backend", &ildb_ops);
+	if (!module) return LDB_ERR_OPERATIONS_ERROR;
+
+	ildb = talloc(module, struct ildb_private);
+	if (!ildb) {
+		ldb_oom(ldb);
+		goto failed;
+	}
+	ldb_module_set_private(module, ildb);
+
+	ildb->event_ctx = ldb_get_event_context(ldb);
+
+	lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
+				 struct loadparm_context);
+
+	ildb->ldap = ldap4_new_connection(ildb, lp_ctx,
+					  ildb->event_ctx);
+	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",
+			  url, ldap_errstr(ildb->ldap, module, status));
+		goto failed;
+	}
+
+	/* 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",
+					  ldap_errstr(ildb->ldap, module, status));
+				goto failed;
+			}
+		} else {
+			status = ldap_bind_sasl(ildb->ldap, creds, lp_ctx);
+			if (!NT_STATUS_IS_OK(status)) {
+				ldb_debug(ldb, LDB_DEBUG_ERROR, "Failed to bind - %s",
+					  ldap_errstr(ildb->ldap, module, status));
+				goto failed;
+			}
+		}
+	}
+
+	*_module = module;
+	return LDB_SUCCESS;
+
+failed:
+	talloc_free(module);
+	return LDB_ERR_OPERATIONS_ERROR;
+}
+
+/*
+  initialise the module
+ */
+_PUBLIC_ int ldb_ildap_init(const char *ldb_version)
+{
+	int ret, i;
+	const char *names[] = { "ldap", "ldaps", "ldapi", NULL };
+	for (i=0; names[i]; i++) {
+		ret = ldb_register_backend(names[i], ildb_connect, true);
+		if (ret != LDB_SUCCESS) {
+			return ret;
+		}
+	}
+	return LDB_SUCCESS;
+}