RRSet encode/decode

rr.go

@@ -119,3 +119,30 @@ func (s RRSet) OnlyTypes(allow ...uint16) (result RRSet) {
 
 	return
 }
+
+func (s RRSet) Encode() (result []byte, err error) {
+	var off int
+	for _, rr := range s {
+		buf := make([]byte, dns.Len(rr))
+		off, err = dns.PackRR(rr, buf, 0, nil, false)
+		if err != nil {
+			return nil, err
+		}
+		result = append(result, buf[:off]...)
+	}
+
+	return result, nil
+}
+
+func DecodeRRSet(buf []byte) (result RRSet, err error) {
+	for len(buf) > 0 {
+		rr, off, err := dns.UnpackRR(buf, 0)
+		if err != nil {
+			return nil, err
+		}
+		buf = buf[off:]
+		result = append(result, rr)
+	}
+
+	return result, nil
+}

rr_test.go

@@ -0,0 +1,32 @@
+package dns_api
+
+import (
+	"net"
+	"testing"
+)
+
+func TestDecodeEncode(t *testing.T) {
+	zone := NewZoneFromPrivateKey(testZone, DecodeTorPrivateKey(testPrivateKey))
+
+	zone.AddRecordTXT("@", []string{"test"}, 3600)
+	zone.AddRecordA("test", net.IPv4(1, 2, 3, 4), 3600)
+
+	t.Logf("encoded:")
+	for _, rr := range zone.GetRRSet() {
+		t.Logf("    %s\n", rr.String())
+	}
+
+	buf, err := zone.GetRRSet().Encode()
+	if err != nil {
+		t.Error(err)
+	}
+
+	rrset, err := DecodeRRSet(buf)
+	if err != nil {
+		t.Error(err)
+	}
+	t.Logf("decoded:")
+	for _, rr := range rrset {
+		t.Logf("    %s\n", rr.String())
+	}
+}