[VOL-1349] EPON ONU adapter (package B)
Change-Id: I609ba349c429bc7e87c74b66bb1121841f9caef6
diff --git a/vendor/github.com/google/gopacket/layers/ppp.go b/vendor/github.com/google/gopacket/layers/ppp.go
new file mode 100644
index 0000000..e534d69
--- /dev/null
+++ b/vendor/github.com/google/gopacket/layers/ppp.go
@@ -0,0 +1,88 @@
+// Copyright 2012 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 (
+ "encoding/binary"
+ "errors"
+ "github.com/google/gopacket"
+)
+
+// PPP is the layer for PPP encapsulation headers.
+type PPP struct {
+ BaseLayer
+ PPPType PPPType
+ HasPPTPHeader bool
+}
+
+// PPPEndpoint is a singleton endpoint for PPP. Since there is no actual
+// addressing for the two ends of a PPP connection, we use a singleton value
+// named 'point' for each endpoint.
+var PPPEndpoint = gopacket.NewEndpoint(EndpointPPP, nil)
+
+// PPPFlow is a singleton flow for PPP. Since there is no actual addressing for
+// the two ends of a PPP connection, we use a singleton value to represent the
+// flow for all PPP connections.
+var PPPFlow = gopacket.NewFlow(EndpointPPP, nil, nil)
+
+// LayerType returns LayerTypePPP
+func (p *PPP) LayerType() gopacket.LayerType { return LayerTypePPP }
+
+// LinkFlow returns PPPFlow.
+func (p *PPP) LinkFlow() gopacket.Flow { return PPPFlow }
+
+func decodePPP(data []byte, p gopacket.PacketBuilder) error {
+ ppp := &PPP{}
+ offset := 0
+ if data[0] == 0xff && data[1] == 0x03 {
+ offset = 2
+ ppp.HasPPTPHeader = true
+ }
+ if data[offset]&0x1 == 0 {
+ if data[offset+1]&0x1 == 0 {
+ return errors.New("PPP has invalid type")
+ }
+ ppp.PPPType = PPPType(binary.BigEndian.Uint16(data[offset : offset+2]))
+ ppp.Contents = data[offset : offset+2]
+ ppp.Payload = data[offset+2:]
+ } else {
+ ppp.PPPType = PPPType(data[offset])
+ ppp.Contents = data[offset : offset+1]
+ ppp.Payload = data[offset+1:]
+ }
+ p.AddLayer(ppp)
+ p.SetLinkLayer(ppp)
+ return p.NextDecoder(ppp.PPPType)
+}
+
+// SerializeTo writes the serialized form of this layer into the
+// SerializationBuffer, implementing gopacket.SerializableLayer.
+// See the docs for gopacket.SerializableLayer for more info.
+func (p *PPP) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error {
+ if p.PPPType&0x100 == 0 {
+ bytes, err := b.PrependBytes(2)
+ if err != nil {
+ return err
+ }
+ binary.BigEndian.PutUint16(bytes, uint16(p.PPPType))
+ } else {
+ bytes, err := b.PrependBytes(1)
+ if err != nil {
+ return err
+ }
+ bytes[0] = uint8(p.PPPType)
+ }
+ if p.HasPPTPHeader {
+ bytes, err := b.PrependBytes(2)
+ if err != nil {
+ return err
+ }
+ bytes[0] = 0xff
+ bytes[1] = 0x03
+ }
+ return nil
+}