From 9cd656b3777df28579cee8dc85879246de2d9afa Mon Sep 17 00:00:00 2001
From: Miek Gieben <miek@miek.nl>
Date: Tue, 22 Jan 2013 13:27:48 +0100
Subject: [PATCH 1/2] typo

---
 edns.go               | 2 +-
 ex/reflect/reflect.go | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/edns.go b/edns.go
index 7c3b722b..a274a38a 100644
--- a/edns.go
+++ b/edns.go
@@ -14,7 +14,7 @@
 // Basic use pattern for a server to check if (and which) options are set:
 //
 //	// o is a dns.OPT
-//	for _, s := range o.Options {
+//	for _, s := range o.Option {
 //		switch e := s.(type) {
 //		case *dns.EDNS0_NSID:
 //			// do stuff with e.Nsid
diff --git a/ex/reflect/reflect.go b/ex/reflect/reflect.go
index ef47c6cb..e9b824a4 100644
--- a/ex/reflect/reflect.go
+++ b/ex/reflect/reflect.go
@@ -72,6 +72,15 @@ func handleReflect(w dns.ResponseWriter, r *dns.Msg) {
 		v4 = a.To4() != nil
 	}
 
+	if o := r.IsEdns0(); o != nil {
+		for _, s := range o.Options {
+			switch e = s.(type) {
+			case *dns.EDNS0_SUBNET:
+				println("SUBNET")
+			}
+		}
+	}
+
 	if v4 {
 		rr = new(dns.A)
 		rr.(*dns.A).Hdr = dns.RR_Header{Name: dom, Rrtype: dns.TypeA, Class: dns.ClassINET, Ttl: 0}

From 951af98c7ef7d80c30a19447fbce2a49c7f285f8 Mon Sep 17 00:00:00 2001
From: Miek Gieben <miek@miek.nl>
Date: Tue, 22 Jan 2013 16:41:41 +0100
Subject: [PATCH 2/2] fix multiple edns0 option code

---
 msg.go | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/msg.go b/msg.go
index 8eb5ab7a..294164ed 100644
--- a/msg.go
+++ b/msg.go
@@ -712,6 +712,7 @@ func unpackStructValue(val reflect.Value, msg []byte, off int) (off1 int, err er
 				fv.Set(reflect.ValueOf(txt))
 			case `dns:"opt"`: // edns0
 				rdlength := int(val.FieldByName("Hdr").FieldByName("Rdlength").Uint())
+				endrr := off + rdlength
 				if rdlength == 0 {
 					// This is an EDNS0 (OPT Record) with no rdata
 					// We can safely return here.
@@ -744,8 +745,11 @@ func unpackStructValue(val reflect.Value, msg []byte, off int) (off1 int, err er
 					e.unpack(msg[off1 : off1+int(optlen)])
 					edns = append(edns, e)
 					off = off1 + int(optlen)
+				default:
+					// do nothing?
+					off = off1 + int(optlen)
 				}
-				if off < rdlength {
+				if off < endrr {
 					goto Option
 				}
 				fv.Set(reflect.ValueOf(edns))