/* 
   Unix SMB/CIFS implementation.
   
   Extract the user/system database from a remote server

   Copyright (C) Stefan Metzmacher	2004-2006
   Copyright (C) Brad Henry 2005
   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2008
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program 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 General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/


#include "includes.h"
#include "libnet/libnet.h"
#include "lib/events/events.h"
#include "dsdb/samdb/samdb.h"
#include "../lib/util/dlinklist.h"
#include "lib/ldb/include/ldb.h"
#include "lib/ldb/include/ldb_errors.h"
#include "librpc/ndr/libndr.h"
#include "librpc/gen_ndr/ndr_drsuapi.h"
#include "librpc/gen_ndr/ndr_drsblobs.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "system/time.h"
#include "lib/ldb_wrap.h"
#include "auth/auth.h"
#include "param/param.h"
#include "param/provision.h"
#include "libcli/security/dom_sid.h"

/* 
List of tasks vampire.py must perform:
- Domain Join
 - but don't write the secrets.ldb
 - results for this should be enough to handle the provision
- if vampire method is samsync 
 - Provision using these results 
  - do we still want to support this NT4 technology?
- Start samsync with libnet code
 - provision in the callback 
- Write out the secrets database, using the code from libnet_Join

*/
struct vampire_state {
	const char *netbios_name;
	struct libnet_JoinDomain *join;
	struct cli_credentials *machine_account;
	struct dsdb_schema *self_made_schema;
	const struct dsdb_schema *schema;

	struct ldb_context *ldb;

	struct {
		uint32_t object_count;
		struct drsuapi_DsReplicaObjectListItemEx *first_object;
		struct drsuapi_DsReplicaObjectListItemEx *last_object;
	} schema_part;

	const char *targetdir;

	struct loadparm_context *lp_ctx;
	struct tevent_context *event_ctx;
	unsigned total_objects;
	char *last_partition;
};

static NTSTATUS vampire_prepare_db(void *private_data,
					      const struct libnet_BecomeDC_PrepareDB *p)
{
	struct vampire_state *s = talloc_get_type(private_data, struct vampire_state);
	struct provision_settings settings;
	struct provision_result result;
	NTSTATUS status;

	ZERO_STRUCT(settings);
	settings.site_name = p->dest_dsa->site_name;
	settings.root_dn_str = p->forest->root_dn_str;
	settings.domain_dn_str = p->domain->dn_str;
	settings.config_dn_str = p->forest->config_dn_str;
	settings.schema_dn_str = p->forest->schema_dn_str;
	settings.netbios_name = p->dest_dsa->netbios_name;
	settings.realm = s->join->out.realm;
	settings.domain = s->join->out.domain_name;
	settings.server_dn_str = p->dest_dsa->server_dn_str;
	settings.machine_password = generate_random_password(s, 16, 255);
	settings.targetdir = s->targetdir;

	status = provision_bare(s, s->lp_ctx, &settings, &result);

	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	s->ldb = result.samdb;
	s->lp_ctx = result.lp_ctx;

	/* wrap the entire vapire operation in a transaction.  This
	   isn't just cosmetic - we use this to ensure that linked
	   attribute back links are added at the end by relying on a
	   transaction commit hook in the linked attributes module. We
	   need to do this as the order of objects coming from the
	   server is not sufficiently deterministic to know that the
	   record that a backlink needs to be created in has itself
	   been created before the object containing the forward link
	   has come over the wire */
	if (ldb_transaction_start(s->ldb) != LDB_SUCCESS) {
		return NT_STATUS_FOOBAR;
	}

        return NT_STATUS_OK;


}

static NTSTATUS vampire_check_options(void *private_data,
					     const struct libnet_BecomeDC_CheckOptions *o)
{
	struct vampire_state *s = talloc_get_type(private_data, struct vampire_state);

	DEBUG(0,("Become DC [%s] of Domain[%s]/[%s]\n",
		s->netbios_name,
		o->domain->netbios_name, o->domain->dns_name));

	DEBUG(0,("Promotion Partner is Server[%s] from Site[%s]\n",
		o->source_dsa->dns_name, o->source_dsa->site_name));

	DEBUG(0,("Options:crossRef behavior_version[%u]\n"
		       "\tschema object_version[%u]\n"
		       "\tdomain behavior_version[%u]\n"
		       "\tdomain w2k3_update_revision[%u]\n", 
		o->forest->crossref_behavior_version,
		o->forest->schema_object_version,
		o->domain->behavior_version,
		o->domain->w2k3_update_revision));

	return NT_STATUS_OK;
}

static NTSTATUS vampire_apply_schema(struct vampire_state *s,
				  const struct libnet_BecomeDC_StoreChunk *c)
{
	WERROR status;
	const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr;
	uint32_t object_count;
	struct drsuapi_DsReplicaObjectListItemEx *first_object;
	struct drsuapi_DsReplicaObjectListItemEx *cur;
	uint32_t linked_attributes_count;
	struct drsuapi_DsReplicaLinkedAttribute *linked_attributes;
	const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector;
	struct dsdb_extended_replicated_objects *objs;
	struct repsFromTo1 *s_dsa;
	char *tmp_dns_name;
	struct ldb_message *msg;
	struct ldb_val prefixMap_val;
	struct ldb_message_element *prefixMap_el;
	struct ldb_val schemaInfo_val;
	uint32_t i;
	int ret;
	bool ok;
	uint64_t seq_num;

	DEBUG(0,("Analyze and apply schema objects\n"));

	s_dsa			= talloc_zero(s, struct repsFromTo1);
	NT_STATUS_HAVE_NO_MEMORY(s_dsa);
	s_dsa->other_info	= talloc(s_dsa, struct repsFromTo1OtherInfo);
	NT_STATUS_HAVE_NO_MEMORY(s_dsa->other_info);

	switch (c->ctr_level) {
	case 1:
		mapping_ctr			= &c->ctr1->mapping_ctr;
		object_count			= s->schema_part.object_count;
		first_object			= s->schema_part.first_object;
		linked_attributes_count		= 0;
		linked_attributes		= NULL;
		s_dsa->highwatermark		= c->ctr1->new_highwatermark;
		s_dsa->source_dsa_obj_guid	= c->ctr1->source_dsa_guid;
		s_dsa->source_dsa_invocation_id = c->ctr1->source_dsa_invocation_id;
		uptodateness_vector		= NULL; /* TODO: map it */
		break;
	case 6:
		mapping_ctr			= &c->ctr6->mapping_ctr;
		object_count			= s->schema_part.object_count;
		first_object			= s->schema_part.first_object;
		linked_attributes_count		= c->ctr6->linked_attributes_count;
		linked_attributes		= c->ctr6->linked_attributes;
		s_dsa->highwatermark		= c->ctr6->new_highwatermark;
		s_dsa->source_dsa_obj_guid	= c->ctr6->source_dsa_guid;
		s_dsa->source_dsa_invocation_id = c->ctr6->source_dsa_invocation_id;
		uptodateness_vector		= c->ctr6->uptodateness_vector;
		break;
	default:
		return NT_STATUS_INVALID_PARAMETER;
	}

	s_dsa->replica_flags		= DRSUAPI_DRS_WRIT_REP
					| DRSUAPI_DRS_INIT_SYNC
					| DRSUAPI_DRS_PER_SYNC;
	memset(s_dsa->schedule, 0x11, sizeof(s_dsa->schedule));

	tmp_dns_name	= GUID_string(s_dsa->other_info, &s_dsa->source_dsa_obj_guid);
	NT_STATUS_HAVE_NO_MEMORY(tmp_dns_name);
	tmp_dns_name	= talloc_asprintf_append_buffer(tmp_dns_name, "._msdcs.%s", c->forest->dns_name);
	NT_STATUS_HAVE_NO_MEMORY(tmp_dns_name);
	s_dsa->other_info->dns_name = tmp_dns_name;

	for (cur = first_object; cur; cur = cur->next_object) {
		bool is_attr = false;
		bool is_class = false;

		for (i=0; i < cur->object.attribute_ctr.num_attributes; i++) {
			struct drsuapi_DsReplicaAttribute *a;
			uint32_t j;
			const char *oid = NULL;

			a = &cur->object.attribute_ctr.attributes[i];
			status = dsdb_schema_pfm_oid_from_attid(s->self_made_schema->prefixmap,
								a->attid, s, &oid);
			if (!W_ERROR_IS_OK(status)) {
				return werror_to_ntstatus(status);
			}

			switch (a->attid) {
			case DRSUAPI_ATTRIBUTE_objectClass:
				for (j=0; j < a->value_ctr.num_values; j++) {
					uint32_t val = 0xFFFFFFFF;

					if (a->value_ctr.values[j].blob
					    && a->value_ctr.values[j].blob->length == 4) {
						val = IVAL(a->value_ctr.values[j].blob->data,0);
					}

					if (val == DRSUAPI_OBJECTCLASS_attributeSchema) {
						is_attr = true;
					}
					if (val == DRSUAPI_OBJECTCLASS_classSchema) {
						is_class = true;
					}
				}

				break;
			default:
				break;
			}
		}

		if (is_attr) {
			struct dsdb_attribute *sa;

			sa = talloc_zero(s->self_made_schema, struct dsdb_attribute);
			NT_STATUS_HAVE_NO_MEMORY(sa);

			status = dsdb_attribute_from_drsuapi(s->ldb, s->self_made_schema, &cur->object, s, sa);
			if (!W_ERROR_IS_OK(status)) {
				return werror_to_ntstatus(status);
			}

			DLIST_ADD_END(s->self_made_schema->attributes, sa, struct dsdb_attribute *);
		}

		if (is_class) {
			struct dsdb_class *sc;

			sc = talloc_zero(s->self_made_schema, struct dsdb_class);
			NT_STATUS_HAVE_NO_MEMORY(sc);

			status = dsdb_class_from_drsuapi(s->ldb, s->self_made_schema, &cur->object, s, sc);
			if (!W_ERROR_IS_OK(status)) {
				return werror_to_ntstatus(status);
			}
			DLIST_ADD_END(s->self_made_schema->classes, sc, struct dsdb_class *);
		}
	}

	/* attach the schema to the ldb */
	ret = dsdb_set_schema(s->ldb, s->self_made_schema);
	if (ret != LDB_SUCCESS) {
		return NT_STATUS_FOOBAR;
	}
	/* we don't want to access the self made schema anymore */
	s->schema = s->self_made_schema;
	s->self_made_schema = NULL;

	/* Now convert the schema elements again, using the schema we just imported */
	status = dsdb_extended_replicated_objects_convert(s->ldb, 
							  c->partition->nc.dn,
							  mapping_ctr,
							  object_count,
							  first_object,
							  linked_attributes_count,
							  linked_attributes,
							  s_dsa,
							  uptodateness_vector,
							  c->gensec_skey,
							  s, &objs);
	if (!W_ERROR_IS_OK(status)) {
		DEBUG(0,("Failed to commit objects: %s\n", win_errstr(status)));
		return werror_to_ntstatus(status);
	}

	if (lp_parm_bool(s->lp_ctx, NULL, "become dc", "dump objects", false)) {
		for (i=0; i < objs->num_objects; i++) {
			struct ldb_ldif ldif;
			fprintf(stdout, "#\n");
			ldif.changetype = LDB_CHANGETYPE_NONE;
			ldif.msg = objs->objects[i].msg;
			ldb_ldif_write_file(s->ldb, stdout, &ldif);
			NDR_PRINT_DEBUG(replPropertyMetaDataBlob, objs->objects[i].meta_data);
		}
	}

	status = dsdb_extended_replicated_objects_commit(s->ldb, objs, &seq_num);
	if (!W_ERROR_IS_OK(status)) {
		DEBUG(0,("Failed to commit objects: %s\n", win_errstr(status)));
		return werror_to_ntstatus(status);
	}

	msg = ldb_msg_new(objs);
	NT_STATUS_HAVE_NO_MEMORY(msg);
	msg->dn = objs->partition_dn;

	status = dsdb_get_oid_mappings_ldb(s->schema, msg, &prefixMap_val, &schemaInfo_val);
	if (!W_ERROR_IS_OK(status)) {
		DEBUG(0,("Failed dsdb_get_oid_mappings_ldb(%s)\n", win_errstr(status)));
		return werror_to_ntstatus(status);
	}

	/* we only add prefixMap here, because schemaInfo is a replicated attribute and already applied */
	ret = ldb_msg_add_value(msg, "prefixMap", &prefixMap_val, &prefixMap_el);
	if (ret != LDB_SUCCESS) {
		return NT_STATUS_FOOBAR;
	}
	prefixMap_el->flags = LDB_FLAG_MOD_REPLACE;

	ret = ldb_modify(s->ldb, msg);
	if (ret != LDB_SUCCESS) {
		DEBUG(0,("Failed to add prefixMap and schemaInfo %s\n", ldb_strerror(ret)));
		return NT_STATUS_FOOBAR;
	}

	talloc_free(s_dsa);
	talloc_free(objs);

	/* We must set these up to ensure the replMetaData is written
	 * correctly, before our NTDS Settings entry is replicated */
	ok = samdb_set_ntds_invocation_id(s->ldb, &c->dest_dsa->invocation_id);
	if (!ok) {
		DEBUG(0,("Failed to set cached ntds invocationId\n"));
		return NT_STATUS_FOOBAR;
	}
	ok = samdb_set_ntds_objectGUID(s->ldb, &c->dest_dsa->ntds_guid);
	if (!ok) {
		DEBUG(0,("Failed to set cached ntds objectGUID\n"));
		return NT_STATUS_FOOBAR;
	}

	s->schema = dsdb_get_schema(s->ldb, s);
	if (!s->schema) {
		DEBUG(0,("Failed to get loaded dsdb_schema\n"));
		return NT_STATUS_FOOBAR;
	}

	return NT_STATUS_OK;
}

static NTSTATUS vampire_schema_chunk(void *private_data,
					    const struct libnet_BecomeDC_StoreChunk *c)
{
	struct vampire_state *s = talloc_get_type(private_data, struct vampire_state);
	WERROR status;
	const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr;
	uint32_t nc_object_count;
	uint32_t object_count;
	struct drsuapi_DsReplicaObjectListItemEx *first_object;
	struct drsuapi_DsReplicaObjectListItemEx *cur;
	uint32_t nc_linked_attributes_count;
	uint32_t linked_attributes_count;
	struct drsuapi_DsReplicaLinkedAttribute *linked_attributes;

	switch (c->ctr_level) {
	case 1:
		mapping_ctr			= &c->ctr1->mapping_ctr;
		nc_object_count			= c->ctr1->extended_ret; /* maybe w2k send this unexpected? */
		object_count			= c->ctr1->object_count;
		first_object			= c->ctr1->first_object;
		nc_linked_attributes_count	= 0;
		linked_attributes_count		= 0;
		linked_attributes		= NULL;
		break;
	case 6:
		mapping_ctr			= &c->ctr6->mapping_ctr;
		nc_object_count			= c->ctr6->nc_object_count;
		object_count			= c->ctr6->object_count;
		first_object			= c->ctr6->first_object;
		nc_linked_attributes_count	= c->ctr6->nc_linked_attributes_count;
		linked_attributes_count		= c->ctr6->linked_attributes_count;
		linked_attributes		= c->ctr6->linked_attributes;
		break;
	default:
		return NT_STATUS_INVALID_PARAMETER;
	}

	if (nc_object_count) {
		DEBUG(0,("Schema-DN[%s] objects[%u/%u] linked_values[%u/%u]\n",
			c->partition->nc.dn, object_count, nc_object_count,
			linked_attributes_count, nc_linked_attributes_count));
	} else {
		DEBUG(0,("Schema-DN[%s] objects[%u] linked_values[%u]\n",
		c->partition->nc.dn, object_count, linked_attributes_count));
	}

	if (!s->schema) {
		s->self_made_schema = dsdb_new_schema(s, lp_iconv_convenience(s->lp_ctx));

		NT_STATUS_HAVE_NO_MEMORY(s->self_made_schema);

		status = dsdb_load_prefixmap_from_drsuapi(s->self_made_schema, mapping_ctr);
		if (!W_ERROR_IS_OK(status)) {
			return werror_to_ntstatus(status);
		}

		s->schema = s->self_made_schema;
	} else {
		status = dsdb_schema_pfm_contains_drsuapi_pfm(s->schema->prefixmap, mapping_ctr);
		if (!W_ERROR_IS_OK(status)) {
			return werror_to_ntstatus(status);
		}
	}

	if (!s->schema_part.first_object) {
		s->schema_part.object_count = object_count;
		s->schema_part.first_object = talloc_steal(s, first_object);
	} else {
		s->schema_part.object_count		+= object_count;
		s->schema_part.last_object->next_object = talloc_steal(s->schema_part.last_object,
								       first_object);
	}
	for (cur = first_object; cur->next_object; cur = cur->next_object) {}
	s->schema_part.last_object = cur;

	if (!c->partition->more_data) {
		return vampire_apply_schema(s, c);
	}

	return NT_STATUS_OK;
}

static NTSTATUS vampire_store_chunk(void *private_data,
					   const struct libnet_BecomeDC_StoreChunk *c)
{
	struct vampire_state *s = talloc_get_type(private_data, struct vampire_state);
	WERROR status;
	const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr;
	uint32_t nc_object_count;
	uint32_t object_count;
	struct drsuapi_DsReplicaObjectListItemEx *first_object;
	uint32_t nc_linked_attributes_count;
	uint32_t linked_attributes_count;
	struct drsuapi_DsReplicaLinkedAttribute *linked_attributes;
	const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector;
	struct dsdb_extended_replicated_objects *objs;
	struct repsFromTo1 *s_dsa;
	char *tmp_dns_name;
	uint32_t i;
	uint64_t seq_num;

	s_dsa			= talloc_zero(s, struct repsFromTo1);
	NT_STATUS_HAVE_NO_MEMORY(s_dsa);
	s_dsa->other_info	= talloc(s_dsa, struct repsFromTo1OtherInfo);
	NT_STATUS_HAVE_NO_MEMORY(s_dsa->other_info);

	switch (c->ctr_level) {
	case 1:
		mapping_ctr			= &c->ctr1->mapping_ctr;
		nc_object_count			= c->ctr1->extended_ret; /* maybe w2k send this unexpected? */
		object_count			= c->ctr1->object_count;
		first_object			= c->ctr1->first_object;
		nc_linked_attributes_count	= 0;
		linked_attributes_count		= 0;
		linked_attributes		= NULL;
		s_dsa->highwatermark		= c->ctr1->new_highwatermark;
		s_dsa->source_dsa_obj_guid	= c->ctr1->source_dsa_guid;
		s_dsa->source_dsa_invocation_id = c->ctr1->source_dsa_invocation_id;
		uptodateness_vector		= NULL; /* TODO: map it */
		break;
	case 6:
		mapping_ctr			= &c->ctr6->mapping_ctr;
		nc_object_count			= c->ctr6->nc_object_count;
		object_count			= c->ctr6->object_count;
		first_object			= c->ctr6->first_object;
		nc_linked_attributes_count	= c->ctr6->nc_linked_attributes_count;
		linked_attributes_count		= c->ctr6->linked_attributes_count;
		linked_attributes		= c->ctr6->linked_attributes;
		s_dsa->highwatermark		= c->ctr6->new_highwatermark;
		s_dsa->source_dsa_obj_guid	= c->ctr6->source_dsa_guid;
		s_dsa->source_dsa_invocation_id = c->ctr6->source_dsa_invocation_id;
		uptodateness_vector		= c->ctr6->uptodateness_vector;
		break;
	default:
		return NT_STATUS_INVALID_PARAMETER;
	}

	s_dsa->replica_flags		= DRSUAPI_DRS_WRIT_REP
					| DRSUAPI_DRS_INIT_SYNC
					| DRSUAPI_DRS_PER_SYNC;
	memset(s_dsa->schedule, 0x11, sizeof(s_dsa->schedule));

	tmp_dns_name	= GUID_string(s_dsa->other_info, &s_dsa->source_dsa_obj_guid);
	NT_STATUS_HAVE_NO_MEMORY(tmp_dns_name);
	tmp_dns_name	= talloc_asprintf_append_buffer(tmp_dns_name, "._msdcs.%s", c->forest->dns_name);
	NT_STATUS_HAVE_NO_MEMORY(tmp_dns_name);
	s_dsa->other_info->dns_name = tmp_dns_name;

	/* we want to show a count per partition */
	if (!s->last_partition || strcmp(s->last_partition, c->partition->nc.dn) != 0) {
		s->total_objects = 0;
		talloc_free(s->last_partition);
		s->last_partition = talloc_strdup(s, c->partition->nc.dn);
	}
	s->total_objects += object_count;

	if (nc_object_count) {
		DEBUG(0,("Partition[%s] objects[%u/%u] linked_values[%u/%u]\n",
			c->partition->nc.dn, s->total_objects, nc_object_count,
			linked_attributes_count, nc_linked_attributes_count));
	} else {
		DEBUG(0,("Partition[%s] objects[%u] linked_values[%u]\n",
		c->partition->nc.dn, s->total_objects, linked_attributes_count));
	}


	status = dsdb_extended_replicated_objects_convert(s->ldb,
							  c->partition->nc.dn,
							  mapping_ctr,
							  object_count,
							  first_object,
							  linked_attributes_count,
							  linked_attributes,
							  s_dsa,
							  uptodateness_vector,
							  c->gensec_skey,
							  s, &objs);
	if (!W_ERROR_IS_OK(status)) {
		DEBUG(0,("Failed to convert objects: %s\n", win_errstr(status)));
		return werror_to_ntstatus(status);
	}

	if (lp_parm_bool(s->lp_ctx, NULL, "become dc", "dump objects", false)) {
		for (i=0; i < objs->num_objects; i++) {
			struct ldb_ldif ldif;
			fprintf(stdout, "#\n");
			ldif.changetype = LDB_CHANGETYPE_NONE;
			ldif.msg = objs->objects[i].msg;
			ldb_ldif_write_file(s->ldb, stdout, &ldif);
			NDR_PRINT_DEBUG(replPropertyMetaDataBlob, objs->objects[i].meta_data);
		}
	}
	status = dsdb_extended_replicated_objects_commit(s->ldb,
							 objs, &seq_num);
	if (!W_ERROR_IS_OK(status)) {
		DEBUG(0,("Failed to commit objects: %s\n", win_errstr(status)));
		return werror_to_ntstatus(status);
	}

	talloc_free(s_dsa);
	talloc_free(objs);

	for (i=0; i < linked_attributes_count; i++) {
		const struct dsdb_attribute *sa;

		if (!linked_attributes[i].identifier) {
			return NT_STATUS_FOOBAR;		
		}

		if (!linked_attributes[i].value.blob) {
			return NT_STATUS_FOOBAR;		
		}

		sa = dsdb_attribute_by_attributeID_id(s->schema,
						      linked_attributes[i].attid);
		if (!sa) {
			return NT_STATUS_FOOBAR;
		}

		if (lp_parm_bool(s->lp_ctx, NULL, "become dc", "dump objects", false)) {
			DEBUG(0,("# %s\n", sa->lDAPDisplayName));
			NDR_PRINT_DEBUG(drsuapi_DsReplicaLinkedAttribute, &linked_attributes[i]);
			dump_data(0,
				linked_attributes[i].value.blob->data,
				linked_attributes[i].value.blob->length);
		}
	}

	return NT_STATUS_OK;
}

NTSTATUS libnet_Vampire(struct libnet_context *ctx, TALLOC_CTX *mem_ctx, 
			struct libnet_Vampire *r)
{
	struct libnet_JoinDomain *join;
	struct provision_store_self_join_settings *set_secrets;
	struct libnet_BecomeDC b;
	struct vampire_state *s;
	struct ldb_message *msg;
	const char *error_string;
	int ldb_ret;
	uint32_t i;
	NTSTATUS status;

	const char *account_name;
	const char *netbios_name;
	
	r->out.error_string = NULL;

	s = talloc_zero(mem_ctx, struct vampire_state);
	if (!s) {
		return NT_STATUS_NO_MEMORY;
	}

	s->lp_ctx = ctx->lp_ctx;
	s->event_ctx = ctx->event_ctx;

	join = talloc_zero(s, struct libnet_JoinDomain);
	if (!join) {
		return NT_STATUS_NO_MEMORY;
	}
		
	if (r->in.netbios_name != NULL) {
		netbios_name = r->in.netbios_name;
	} else {
		netbios_name = talloc_reference(join, lp_netbios_name(ctx->lp_ctx));
		if (!netbios_name) {
			r->out.error_string = NULL;
			talloc_free(s);
			return NT_STATUS_NO_MEMORY;
		}
	}

	account_name = talloc_asprintf(join, "%s$", netbios_name);
	if (!account_name) {
		r->out.error_string = NULL;
		talloc_free(s);
		return NT_STATUS_NO_MEMORY;
	}
	
	join->in.domain_name	= r->in.domain_name;
	join->in.account_name	= account_name;
	join->in.netbios_name	= netbios_name;
	join->in.level		= LIBNET_JOINDOMAIN_AUTOMATIC;
	join->in.acct_type	= ACB_WSTRUST;
	join->in.recreate_account = false;
	status = libnet_JoinDomain(ctx, join, join);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_steal(mem_ctx, join->out.error_string);
		talloc_free(s);
		return status;
	}
	
	s->join = join;

	s->targetdir = r->in.targetdir;

	ZERO_STRUCT(b);
	b.in.domain_dns_name		= join->out.realm;
	b.in.domain_netbios_name	= join->out.domain_name;
	b.in.domain_sid			= join->out.domain_sid;
	b.in.source_dsa_address		= join->out.samr_binding->host;
	b.in.dest_dsa_netbios_name	= netbios_name;

	b.in.callbacks.private_data	= s;
	b.in.callbacks.check_options	= vampire_check_options;
	b.in.callbacks.prepare_db       = vampire_prepare_db;
	b.in.callbacks.schema_chunk	= vampire_schema_chunk;
	b.in.callbacks.config_chunk	= vampire_store_chunk;
	b.in.callbacks.domain_chunk	= vampire_store_chunk;

	b.in.rodc_join = lp_parm_bool(s->lp_ctx, NULL, "repl", "RODC", false);

	status = libnet_BecomeDC(ctx, s, &b);
	if (!NT_STATUS_IS_OK(status)) {
		printf("libnet_BecomeDC() failed - %s\n", nt_errstr(status));
		talloc_free(s);
		return status;
	}

	msg = ldb_msg_new(s);
	if (!msg) {
		printf("ldb_msg_new() failed\n");
		talloc_free(s);
		return NT_STATUS_NO_MEMORY;
	}
	msg->dn = ldb_dn_new(msg, s->ldb, "@ROOTDSE");
	if (!msg->dn) {
		printf("ldb_msg_new(@ROOTDSE) failed\n");
		talloc_free(s);
		return NT_STATUS_NO_MEMORY;
	}

	ldb_ret = ldb_msg_add_string(msg, "isSynchronized", "TRUE");
	if (ldb_ret != LDB_SUCCESS) {
		printf("ldb_msg_add_string(msg, isSynchronized, TRUE) failed: %d\n", ldb_ret);
		talloc_free(s);
		return NT_STATUS_NO_MEMORY;
	}

	for (i=0; i < msg->num_elements; i++) {
		msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
	}

	printf("mark ROOTDSE with isSynchronized=TRUE\n");
	ldb_ret = ldb_modify(s->ldb, msg);
	if (ldb_ret != LDB_SUCCESS) {
		printf("ldb_modify() failed: %d : %s\n", ldb_ret, ldb_errstring(s->ldb));
		talloc_free(s);
		return NT_STATUS_INTERNAL_DB_ERROR;
	}

	/* prepare the transaction - this prepares to commit all the changes in
	   the ldb from the whole vampire.  Note that this 
	   triggers the writing of the linked attribute backlinks.
	*/
	if (ldb_transaction_prepare_commit(s->ldb) != LDB_SUCCESS) {
		printf("Failed to prepare_commit vampire transaction: %s\n", ldb_errstring(s->ldb));
		return NT_STATUS_INTERNAL_DB_ERROR;
	}

	set_secrets = talloc(s, struct provision_store_self_join_settings);
	if (!set_secrets) {
		r->out.error_string = NULL;
		talloc_free(s);
		return NT_STATUS_NO_MEMORY;
	}
	
	ZERO_STRUCTP(set_secrets);
	set_secrets->domain_name = join->out.domain_name;
	set_secrets->realm = join->out.realm;
	set_secrets->account_name = account_name;
	set_secrets->netbios_name = netbios_name;
	set_secrets->secure_channel_type = SEC_CHAN_BDC;
	set_secrets->machine_password = join->out.join_password;
	set_secrets->key_version_number = join->out.kvno;
	set_secrets->domain_sid = join->out.domain_sid;
	
	status = provision_store_self_join(ctx, ctx->lp_ctx, ctx->event_ctx, set_secrets, &error_string);
	if (!NT_STATUS_IS_OK(status)) {
		r->out.error_string = talloc_steal(mem_ctx, error_string);
		talloc_free(s);
		return status;
	}

	r->out.domain_name = talloc_steal(r, join->out.domain_name);
	r->out.domain_sid = dom_sid_dup(r, join->out.domain_sid);
	
	/* commit the transaction now we know the secrets were written
	 * out properly
	*/
	if (ldb_transaction_commit(s->ldb) != LDB_SUCCESS) {
		printf("Failed to commit vampire transaction\n");
		return NT_STATUS_INTERNAL_DB_ERROR;
	}

	talloc_free(s);

	return NT_STATUS_OK;

}