1 files changed, 11 insertions, 0 deletions
diff --git a/middleware/middleware.go b/middleware/middleware.go
index 47d732f4d..da0107cd3 100644
--- a/middleware/middleware.go
+++ b/middleware/middleware.go
@@ -2,6 +2,7 @@
 package middleware
 
 import (
+	"errors"
 	"fmt"
 
 	"github.com/miekg/dns"
@@ -65,5 +66,15 @@ func (f HandlerFunc) Name() string { return "handlerfunc" }
 // Error returns err with 'middleware/name: ' prefixed to it.
 func Error(name string, err error) error { return fmt.Errorf("%s/%s: %s", "middleware", name, err) }
 
+// NextOrFailure calls next.ServeDNS when next is not nill, otherwise it will return, a ServerFailure
+// and a nil error.
+func NextOrFailure(name string, next Handler, ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
+	if next != nil {
+		return next.ServeDNS(ctx, w, r)
+	}
+
+	return dns.RcodeServerFailure, Error(name, errors.New("no next middleware found"))
+}
+
 // Namespace is the namespace used for the metrics.
 const Namespace = "coredns"