Add NULL record

Sorely missing from this library. Add it. Signed-off-by: Miek Gieben <miek@miek.nl>
miekg · Dec 1, 2018 · 0df5fca · 0df5fca
1 parent 091d66a
commit 0df5fca
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Showing 6 changed files with 79 additions and 1 deletion.
diff --git a/msg_generate.go b/msg_generate.go
diff --git a/msg_helpers.go b/msg_helpers.go
@@ -363,6 +363,22 @@ func packStringHex(s string, msg []byte, off int) (int, error) {
 	return off, nil
 }
 
+func unpackStringAny(msg []byte, off, end int) (string, int, error) {
+	if end > len(msg) {
+		return "", len(msg), &Error{err: "overflow unpacking anything"}
+	}
+	return string(msg[off:end]), end, nil
+}
+
+func packStringAny(s string, msg []byte, off int) (int, error) {
+	if off+len(s) > len(msg) {
+		return len(msg), &Error{err: "overflow packing anything"}
+	}
+	copy(msg[off:off+len(s)], s)
+	off += len(s)
+	return off, nil
+}
+
 func unpackStringTxt(msg []byte, off int) ([]string, int, error) {
 	txt, off, err := unpackTxt(msg, off)
 	if err != nil {

diff --git a/types.go b/types.go
@@ -239,6 +239,14 @@ type ANY struct {
 
 func (rr *ANY) String() string { return rr.Hdr.String() }
 
+// NULL RR. See RFC 1035.
+type NULL struct {
+	Hdr      RR_Header
+	Anything string `dns:"any"`
+}
+
+func (rr *NULL) String() string { return rr.Hdr.String() + rr.Anything }
+
 // CNAME RR. See RFC 1034.
 type CNAME struct {
 	Hdr    RR_Header

diff --git a/zduplicate.go b/zduplicate.go
diff --git a/zmsg.go b/zmsg.go
diff --git a/ztypes.go b/ztypes.go