1 files changed, 0 insertions, 77 deletions
diff --git a/middleware/kubernetes/autopath.go b/middleware/kubernetes/autopath.go
deleted file mode 100644
index fa79212a9..000000000
--- a/middleware/kubernetes/autopath.go
+++ /dev/null
@@ -1,77 +0,0 @@
-package kubernetes
-
-import "github.com/miekg/dns"
-
-// AutoPathWriter implements a ResponseWriter that also does the following:
-// * reverts question section of a packet to its original state.
-//   This is done to avoid the 'Question section mismatch:' error in client.
-// * Defers write to the client if the response code is NXDOMAIN.  This is needed
-//   to enable further search path probing if a search was not successful.
-// * Allow forced write to client regardless of response code.  This is needed to
-//   write the packet to the client if the final search in the path fails to
-//   produce results.
-// * Overwrites response code with AutoPathWriter.Rcode if the response code
-//   is NXDOMAIN (NameError).  This is needed to support the AutoPath.OnNXDOMAIN
-//   function, which returns a NOERROR to client instead of NXDOMAIN if the final
-//   search in the path fails to produce results.
-type AutoPathWriter struct {
-	dns.ResponseWriter
-	original dns.Question
-	Rcode    int
-	Sent     bool
-}
-
-// NewAutoPathWriter returns a pointer to a new AutoPathWriter
-func NewAutoPathWriter(w dns.ResponseWriter, r *dns.Msg) *AutoPathWriter {
-	return &AutoPathWriter{
-		ResponseWriter: w,
-		original:       r.Question[0],
-		Rcode:          dns.RcodeSuccess,
-	}
-}
-
-// WriteMsg writes to client, unless response will be NXDOMAIN
-func (apw *AutoPathWriter) WriteMsg(res *dns.Msg) error {
-	return apw.overrideMsg(res, false)
-}
-
-// ForceWriteMsg forces the write to client regardless of response code
-func (apw *AutoPathWriter) ForceWriteMsg(res *dns.Msg) error {
-	return apw.overrideMsg(res, true)
-}
-
-// overrideMsg overrides rcode, reverts question, adds CNAME, and calls the
-// underlying ResponseWriter's WriteMsg method unless the write is deferred,
-// or force = true.
-func (apw *AutoPathWriter) overrideMsg(res *dns.Msg, force bool) error {
-	if res.Rcode == dns.RcodeNameError {
-		res.Rcode = apw.Rcode
-	}
-	if res.Rcode != dns.RcodeSuccess && !force {
-		return nil
-	}
-	for _, a := range res.Answer {
-		if apw.original.Name == a.Header().Name {
-			continue
-		}
-		res.Answer = append(res.Answer, nil)
-		copy(res.Answer[1:], res.Answer)
-		res.Answer[0] = newCNAME(apw.original.Name, dns.Fqdn(a.Header().Name), a.Header().Ttl)
-	}
-	res.Question[0] = apw.original
-	apw.Sent = true
-	return apw.ResponseWriter.WriteMsg(res)
-}
-
-// Write is a wrapper that records the size of the message that gets written.
-func (apw *AutoPathWriter) Write(buf []byte) (int, error) {
-	n, err := apw.ResponseWriter.Write(buf)
-	return n, err
-}
-
-// Hijack implements dns.Hijacker. It simply wraps the underlying
-// ResponseWriter's Hijack method if there is one, or returns an error.
-func (apw *AutoPathWriter) Hijack() {
-	apw.ResponseWriter.Hijack()
-	return
-}