From 7195ce739ca4469fb892d8d7450514683f94a95b Mon Sep 17 00:00:00 2001
From: Miek Gieben <miek@miek.nl>
Date: Mon, 22 Aug 2011 15:35:52 +0200
Subject: [PATCH] Need to think about naming

---
 update.go | 41 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/update.go b/update.go
index f975ccc0..92f8fc27 100644
--- a/update.go
+++ b/update.go
@@ -79,7 +79,7 @@ func (u *Update) RRsetUsed(rr []RR) {
 	for i, r := range rr {
                 u.Answer[i] = r
                 u.Answer[i].Header().Class = ClassANY
-                /* rdata should be cleared */
+                u.Answer[i].Header().Rdlength = 0
 	}
 }
 
@@ -90,6 +90,43 @@ func (u *Update) RRsetNotUsed(rr []RR) {
 	for i, r := range rr {
                 u.Answer[i] = r
                 u.Answer[i].Header().Class = ClassNONE
-                /* rdata should be cleared */
+                u.Answer[i].Header().Rdlength = 0
 	}
 }
+
+// 3.4.2.6 - Table Of Metavalues Used In Update Section
+//
+//   CLASS    TYPE     RDATA    Meaning
+//   ---------------------------------------------------------
+//   ANY      ANY      empty    Delete all RRsets from a name
+//   ANY      rrset    empty    Delete an RRset
+//   NONE     rrset    rr       Delete an RR from an RRset
+//   zone     rrset    rr       Add to an RRset
+
+
+// RRsetAddFull adds an complete RRset, see RFC 2136 section 2.5.1
+func (u *Update) RRsetAddFull(rr []RR) {
+        u.Ns = make([]RR, len(rr))
+        for i, r := range rr {
+                u.Ns[i] = r
+                u.Ns[i].Header().Class = u.Msg.Question[0].Qclass       // TODO crashes if question is zero
+        }
+}
+
+// RRsetDeleteFull delete the full RR, see RFC 2136 section 2.5.2
+func (u *Update) RRsetDeleteFull(rr []RR) {
+        u.Ns = make([]RR, len(rr))
+        for i, r := range rr {
+                u.Ns[i] = r
+                u.Ns[i].Header().Class = ClassNONE
+        }
+}
+
+// RRsetDelete delete the RRset, see RFC 2136 section 2.5.2
+func (u *Update) DeleteFull(rr []RR) {
+        u.Ns = make([]RR, len(rr))
+        for i, r := range rr {
+                u.Ns[i] = r
+                u.Ns[i].Header().Class = ClassNONE
+        }
+}