From a6ad95f2993d18a24a6bfb650bd66a0c9d0133dd Mon Sep 17 00:00:00 2001
From: WeebDataHoarder <57538841+WeebDataHoarder@users.noreply.github.com>
Date: Wed, 15 Jun 2022 11:59:49 +0200
Subject: [PATCH] RRSet encode/decode

---
 rr.go      | 27 +++++++++++++++++++++++++++
 rr_test.go | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 59 insertions(+)
 create mode 100644 rr_test.go

diff --git a/rr.go b/rr.go
index 3d57026..a4657b5 100644
--- a/rr.go
+++ b/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
+}
diff --git a/rr_test.go b/rr_test.go
new file mode 100644
index 0000000..ccad51b
--- /dev/null
+++ b/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())
+	}
+}