WIP [VOL-2811] - Incorporate preliminary onu-adapter-go code into opencord repo

- reason "discovery-mibsync-complete" reached (via full MibUpload only, received data won't be stored yet)
- first review comments of patchset #4 considered
 (please have a look into our inline-comments in Gerrit to know more about the current state)
- no refactoring done yet

Change-Id: Iac47817f8ce4bd28dd8132f530b0570d57ae99b8
Signed-off-by: Holger Hildebrandt <holger.hildebrandt@adtran.com>
diff --git a/vendor/github.com/google/gopacket/layers/stp.go b/vendor/github.com/google/gopacket/layers/stp.go
new file mode 100644
index 0000000..bde7d7c
--- /dev/null
+++ b/vendor/github.com/google/gopacket/layers/stp.go
@@ -0,0 +1,27 @@
+// Copyright 2017 Google, Inc. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style license
+// that can be found in the LICENSE file in the root of the source
+// tree.
+
+package layers
+
+import (
+	"github.com/google/gopacket"
+)
+
+// STP decode spanning tree protocol packets to transport BPDU (bridge protocol data unit) message.
+type STP struct {
+	BaseLayer
+}
+
+// LayerType returns gopacket.LayerTypeSTP.
+func (s *STP) LayerType() gopacket.LayerType { return LayerTypeSTP }
+
+func decodeSTP(data []byte, p gopacket.PacketBuilder) error {
+	stp := &STP{}
+	stp.Contents = data[:]
+	// TODO:  parse the STP protocol into actual subfields.
+	p.AddLayer(stp)
+	return nil
+}