ldap_server.c

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		int policy_value, s;

		s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
		if (ret != 2 || policy_value == 0)
			continue;
		
		if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
			conn->limits.initial_timeout = policy_value;
			continue;
		}
		if (strcasecmp("MaxConnIdleTime", policy_name) == 0) {
			conn->limits.conn_idle_time = policy_value;
			continue;
		}
		if (strcasecmp("MaxPageSize", policy_name) == 0) {
			conn->limits.max_page_size = policy_value;
			continue;
		}
		if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
			conn->limits.search_timeout = policy_value;
			continue;
		}
	}

	return 0;

failed:
	DEBUG(0, ("Failed to load ldap server query policies\n"));
	talloc_free(tmp_ctx);
	return -1;
}

/*
  initialise a server_context from a open socket and register a event handler
  for reading from that socket
*/
static void ldapsrv_accept(struct stream_connection *c)
{
	struct ldapsrv_service *ldapsrv_service = 
		talloc_get_type(c->private, struct ldapsrv_service);
	struct ldapsrv_connection *conn;
	struct cli_credentials *server_credentials;
	struct socket_address *socket_address;
	NTSTATUS status;
	int port;

	conn = talloc_zero(c, struct ldapsrv_connection);
	if (!conn) {
		stream_terminate_connection(c, "ldapsrv_accept: out of memory");
		return;
	}

	conn->packet      = NULL;
	conn->connection  = c;
	conn->service     = ldapsrv_service;
	conn->sockets.raw = c->socket;
	conn->lp_ctx      = ldapsrv_service->task->lp_ctx;

	c->private        = conn;

	socket_address = socket_get_my_addr(c->socket, conn);
	if (!socket_address) {
		ldapsrv_terminate_connection(conn, "ldapsrv_accept: failed to obtain local socket address!");
		return;
	}
	port = socket_address->port;
	talloc_free(socket_address);

	if (port == 636) {
		struct socket_context *tls_socket = tls_init_server(ldapsrv_service->tls_params, c->socket, 
								    c->event.fde, NULL);
		if (!tls_socket) {
			ldapsrv_terminate_connection(conn, "ldapsrv_accept: tls_init_server() failed");
			return;
		}
		talloc_unlink(c, c->socket);
		talloc_steal(c, tls_socket);
		c->socket = tls_socket;
		conn->sockets.tls = tls_socket;

	} else if (port == 3268) /* Global catalog */ {
		conn->global_catalog = true;
	}
	conn->packet = packet_init(conn);
	if (conn->packet == NULL) {
		ldapsrv_terminate_connection(conn, "out of memory");
		return;
	}

	packet_set_private(conn->packet, conn);
	packet_set_socket(conn->packet, c->socket);
	packet_set_callback(conn->packet, ldapsrv_decode);
	packet_set_full_request(conn->packet, ldap_full_packet);
	packet_set_error_handler(conn->packet, ldapsrv_error_handler);
	packet_set_event_context(conn->packet, c->event.ctx);
	packet_set_fde(conn->packet, c->event.fde);
	packet_set_serialise(conn->packet);
	
	/* Ensure we don't get packets until the database is ready below */
	packet_recv_disable(conn->packet);

	server_credentials = cli_credentials_init(conn);
	if (!server_credentials) {
		stream_terminate_connection(c, "Failed to init server credentials\n");
		return;
	}
	
	cli_credentials_set_conf(server_credentials, conn->lp_ctx);
	status = cli_credentials_set_machine_account(server_credentials, conn->lp_ctx);
	if (!NT_STATUS_IS_OK(status)) {
		stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
		return;
	}
	conn->server_credentials = server_credentials;

	/* Connections start out anonymous */
	if (!NT_STATUS_IS_OK(auth_anonymous_session_info(conn, c->event.ctx, conn->lp_ctx, &conn->session_info))) {
		ldapsrv_terminate_connection(conn, "failed to setup anonymous session info");
		return;
	}

	if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
		ldapsrv_terminate_connection(conn, "backend Init failed");
		return;
	}

	/* load limits from the conf partition */
	ldapsrv_load_limits(conn); /* should we fail on error ? */

	/* register the server */	
	irpc_add_name(c->msg_ctx, "ldap_server");

	/* set connections limits */
	conn->limits.ite = event_add_timed(c->event.ctx, conn, 
					   timeval_current_ofs(conn->limits.initial_timeout, 0),
					   ldapsrv_conn_init_timeout, conn);

	packet_recv_enable(conn->packet);

}

static const struct stream_server_ops ldap_stream_ops = {
	.name			= "ldap",
	.accept_connection	= ldapsrv_accept,
	.recv_handler		= ldapsrv_recv,
	.send_handler		= ldapsrv_send,
};

/*
  add a socket address to the list of events, one event per port
*/
static NTSTATUS add_socket(struct event_context *event_context,
			   struct loadparm_context *lp_ctx, 
			   const struct model_ops *model_ops,
			   const char *address, struct ldapsrv_service *ldap_service)
{
	uint16_t port = 389;
	NTSTATUS status;
	struct ldb_context *ldb;

	status = stream_setup_socket(event_context, lp_ctx,
				     model_ops, &ldap_stream_ops, 
				     "ipv4", address, &port, 
				     lp_socket_options(lp_ctx), 
				     ldap_service);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
			 address, port, nt_errstr(status)));
	}

	if (tls_support(ldap_service->tls_params)) {
		/* add ldaps server */
		port = 636;
		status = stream_setup_socket(event_context, lp_ctx, 
					     model_ops, &ldap_stream_ops, 
					     "ipv4", address, &port, 
					     lp_socket_options(lp_ctx), 
					     ldap_service);
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
				 address, port, nt_errstr(status)));
		}
	}

	/* Load LDAP database */
	ldb = samdb_connect(ldap_service, ldap_service->task->event_ctx, 
			    lp_ctx, system_session(ldap_service, lp_ctx));
	if (!ldb) {
		return NT_STATUS_INTERNAL_DB_CORRUPTION;
	}
	
	if (samdb_is_gc(ldb)) {
		port = 3268;
		status = stream_setup_socket(event_context, lp_ctx,
					     model_ops, &ldap_stream_ops, 
					     "ipv4", address, &port, 
				     	     lp_socket_options(lp_ctx), 
					     ldap_service);
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
				 address, port, nt_errstr(status)));
		}
	}

	return status;
}

/*
  open the ldap server sockets
*/
static void ldapsrv_task_init(struct task_server *task)
{	
	char *ldapi_path;
	struct ldapsrv_service *ldap_service;
	NTSTATUS status;
	const struct model_ops *model_ops;

	switch (lp_server_role(task->lp_ctx)) {
	case ROLE_STANDALONE:
		task_server_terminate(task, "ldap_server: no LDAP server required in standalone configuration");
		return;
	case ROLE_DOMAIN_MEMBER:
		task_server_terminate(task, "ldap_server: no LDAP server required in member server configuration");
		return;
	case ROLE_DOMAIN_CONTROLLER:
		/* Yes, we want an LDAP server */
		break;
	}

	task_server_set_title(task, "task[ldapsrv]");

	/* run the ldap server as a single process */
	model_ops = process_model_byname("single");
	if (!model_ops) goto failed;

	ldap_service = talloc_zero(task, struct ldapsrv_service);
	if (ldap_service == NULL) goto failed;

	ldap_service->task = task;

	ldap_service->tls_params = tls_initialise(ldap_service, task->lp_ctx);
	if (ldap_service->tls_params == NULL) goto failed;

	if (lp_interfaces(task->lp_ctx) && lp_bind_interfaces_only(task->lp_ctx)) {
		struct interface *ifaces;
		int num_interfaces;
		int i;

		load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);
		num_interfaces = iface_count(ifaces);

		/* We have been given an interfaces line, and been 
		   told to only bind to those interfaces. Create a
		   socket per interface and bind to only these.
		*/
		for(i = 0; i < num_interfaces; i++) {
			const char *address = iface_n_ip(ifaces, i);
			status = add_socket(task->event_ctx, task->lp_ctx, model_ops, address, ldap_service);
			if (!NT_STATUS_IS_OK(status)) goto failed;
		}
	} else {
		status = add_socket(task->event_ctx, task->lp_ctx, model_ops, 
				    lp_socket_address(task->lp_ctx), ldap_service);
		if (!NT_STATUS_IS_OK(status)) goto failed;
	}

	ldapi_path = private_path(ldap_service, task->lp_ctx, "ldapi");
	if (!ldapi_path) {
		goto failed;
	}

	status = stream_setup_socket(task->event_ctx, task->lp_ctx,
				     model_ops, &ldap_stream_ops, 
				     "unix", ldapi_path, NULL, 
				     lp_socket_options(task->lp_ctx), 
				     ldap_service);
	talloc_free(ldapi_path);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(0,("ldapsrv failed to bind to %s - %s\n",
			 ldapi_path, nt_errstr(status)));
	}

	return;

failed:
	task_server_terminate(task, "Failed to startup ldap server task");	
}


NTSTATUS server_service_ldap_init(void)
{
	return register_server_service("ldap", ldapsrv_task_init);
}