Index: uspace/lib/c/generic/ns.c
===================================================================
--- uspace/lib/c/generic/ns.c	(revision f51b1d33aaf46c98cee9c0ec13e8521a70b8616d)
+++ uspace/lib/c/generic/ns.c	(revision 4d194beedbc53e41134a652c4e3d8be31fecff2b)
@@ -37,4 +37,5 @@
 #include <async.h>
 #include <macros.h>
+#include <errno.h>
 #include "private/ns.h"
 
@@ -48,5 +49,5 @@
 }
 
-async_sess_t *service_connect(exch_mgmt_t mgmt, sysarg_t service, sysarg_t arg2,
+async_sess_t *service_connect(exch_mgmt_t mgmt, services_t service, sysarg_t arg2,
     sysarg_t arg3)
 {
@@ -72,5 +73,5 @@
 }
 
-async_sess_t *service_connect_blocking(exch_mgmt_t mgmt, sysarg_t service,
+async_sess_t *service_connect_blocking(exch_mgmt_t mgmt, services_t service,
     sysarg_t arg2, sysarg_t arg3)
 {
@@ -81,5 +82,5 @@
 	    async_connect_me_to_blocking(mgmt, exch, service, arg2, arg3);
 	async_exchange_end(exch);
-
+	
 	if (!sess)
 		return NULL;
@@ -91,4 +92,39 @@
 	 */
 	async_sess_args_set(sess, arg2, arg3, 0);
+	
+	return sess;
+}
+
+/** Create bidirectional connection with a service
+ *
+ * @param[in] service         Service.
+ * @param[in] arg1            First parameter.
+ * @param[in] arg2            Second parameter.
+ * @param[in] arg3            Third parameter.
+ * @param[in] client_receiver Message receiver.
+ *
+ * @return Session to the service.
+ * @return Other error codes as defined by async_connect_to_me().
+ *
+ */
+async_sess_t *service_bind(services_t service, sysarg_t arg1, sysarg_t arg2,
+    sysarg_t arg3, async_client_conn_t client_receiver)
+{
+	/* Connect to the needed service */
+	async_sess_t *sess =
+	    service_connect_blocking(EXCHANGE_SERIALIZE, service, 0, 0);
+	if (sess != NULL) {
+		/* Request callback connection */
+		async_exch_t *exch = async_exchange_begin(sess);
+		int rc = async_connect_to_me(exch, arg1, arg2, arg3,
+		    client_receiver, NULL);
+		async_exchange_end(exch);
+		
+		if (rc != EOK) {
+			async_hangup(sess);
+			errno = rc;
+			return NULL;
+		}
+	}
 	
 	return sess;