--- libelwix/inc/elwix/apack.h	2014/02/12 09:20:43	1.8.2.2
+++ libelwix/inc/elwix/apack.h	2014/02/12 09:29:15	1.8.2.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: apack.h,v 1.8.2.2 2014/02/12 09:20:43 misho Exp $
+* $Id: apack.h,v 1.8.2.3 2014/02/12 09:29:15 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -64,6 +64,7 @@ typedef struct tagRawPacket {
 #define RPACK_BUF(x)		(assert((x)), (x)->r_buf)
 #define RPACK_LEN(x)		(assert((x)), (x)->r_len)
 #define RPACK_REWIND(x)		(assert((x)), (x)->r_next = (x)->r_buf)
+#define RPACK_OFF(x)		(assert((x)), (x)->r_next - (x)->r_buf)
 
 #define RPACK_SET_16(x, n)	do { assert((x)); \
 					*((uint8_t *) (x) + 1) = *((const uint8_t *) (n) + 1); \