--- libelwix/src/pack.c	2014/02/11 01:06:21	1.6
+++ libelwix/src/pack.c	2014/02/13 15:06:44	1.6.2.3
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: pack.c,v 1.6 2014/02/11 01:06:21 misho Exp $
+* $Id: pack.c,v 1.6.2.3 2014/02/13 15:06:44 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -100,6 +100,77 @@ rpack_destroy(rpack_t ** __restrict rp)
 }
 
 /*
+ * rpack_attach() - Attach dynamic allocating buffer at packet
+ *
+ * @rp = raw packet;
+ * @len = allocate bytes
+ * return: -1 error or 0 ok, should be detached with rpack_detach() 
+ * 				before call rpack_destroy() after use!
+ */
+int
+rpack_attach(rpack_t * __restrict rp, size_t len)
+{
+	if (!rp)
+		return -1;
+
+	rp->r_buf = e_malloc(len);
+	if (!rp->r_buf) {
+		RPACK_FREE(rp);
+		return -1;
+	} else
+		rp->r_len = len;
+	rp->r_next = rp->r_buf;
+
+	return 0;
+}
+
+/*
+ * rpack_resize() - Resize dynamic allocated buffer at packet
+ *
+ * @rp = raw packet
+ * @newlen = resize buffer to bytes
+ * return: -1 error or 0 ok, should be detached with rpack_detach() 
+ * 				before call rpack_destroy() after use!
+ */
+int
+rpack_resize(rpack_t * __restrict rp, size_t newlen)
+{
+	void *buf = NULL;
+
+	if (!rp)
+		return -1;
+
+	buf = e_realloc(rp->r_buf, newlen);
+	if (!buf)
+		return -1;
+	else {
+		rp->r_buf = buf;
+		rp->r_len = newlen;
+	}
+
+	if (rp->r_next > (rp->r_buf + rp->r_len))
+		rp->r_next = rp->r_buf;
+
+	return 0;
+}
+
+/*
+ * rpack_detach() - Detach and free dynamic allocated buffer from packet
+ *
+ * @rp = raw packet
+ * return: none
+ */
+void
+rpack_detach(rpack_t * __restrict rp)
+{
+	if (!rp)
+		return;
+
+	e_free(rp->r_buf);
+	RPACK_FREE(rp);
+}
+
+/*
  * rpack_align_and_reserve() - Align & reserve space
  *
  * @rp = raw buffer
@@ -432,4 +503,52 @@ rpack_ruint64(rpack_t * __restrict rp, uint64_t * __re
 
 	rp->r_next += sizeof(uint64_t);
 	return u;
+}
+
+/*
+ * rpack_next() - Get and set current position
+ *
+ * @rp = raw packet
+ * @after_len = move aligned current position after length
+ * return: NULL error or current position
+ */
+uint8_t *
+rpack_next(rpack_t * __restrict rp, size_t after_len)
+{
+	uint8_t *cur = NULL, *next = NULL;
+
+	if (!RPACK_SANITY(rp))
+		return NULL;
+	/* No space left */
+	if (!(next = rpack_align_and_reserve(rp, after_len)))
+		return NULL;
+
+	cur = rp->r_next;
+
+	rp->r_next = next + after_len;
+	return cur;
+}
+
+/*
+ * rpack_rnext() - Get and set raw current position
+ *
+ * @rp = raw packet
+ * @after_len = !=0 move current position after length
+ * return: NULL error or raw current position
+ */
+uint8_t *
+rpack_rnext(rpack_t * __restrict rp, size_t after_len)
+{
+	uint8_t *next = NULL;
+
+	if (!RPACK_SANITY(rp))
+		return NULL;
+	/* No space left */
+	if (after_len + rp->r_next - rp->r_buf > rp->r_len)
+		return NULL;
+
+	next = rp->r_next;
+
+	rp->r_next += after_len;
+	return next;
 }