--- libaitrpc/inc/aitrpc.h	2015/01/18 01:03:49	1.25.2.4
+++ libaitrpc/inc/aitrpc.h	2015/01/21 00:37:03	1.25.2.5
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitrpc.h,v 1.25.2.4 2015/01/18 01:03:49 misho Exp $
+* $Id: aitrpc.h,v 1.25.2.5 2015/01/21 00:37:03 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -62,7 +62,7 @@ SUCH DAMAGE.
 #include <aitsched.h>
 
 
-#define RPC_VERSION		7
+#define RPC_VERSION		8
 #define RPC_DEFPORT		2611
 
 /* Additional ELWIX RPC supporting protocols */
@@ -83,6 +83,11 @@ SUCH DAMAGE.
 #define RPC_REPLY		0x0
 #define RPC_NOREPLY		0x1
 
+/* RPC call I/O direction */
+
+#define RPC_REQ			0x0
+#define RPC_ACK			0x1
+
 /* RPC builtin registed calls */
 
 #define CALL_TAG_MAX		65535
@@ -154,7 +159,8 @@ struct tagRPCCall {
 	};
 
 	uint16_t	call_tag;
-	uint16_t	call_argc;
+	uint8_t		call_io;
+	uint8_t		call_argc;
 	ait_val_t	call_argv[0];
 } __packed;			/* size == 20 bytes */
 #define RPC_CHK_NOREPLY(x)	(ntohl((u_long) (x)->call_req.flags) & RPC_NOREPLY)