[VOL-1349] EPON OLT adapter (package B)
Change-Id: I634ef62c53813dcf4456f54948f13e06358e263c
diff --git a/vendor/github.com/google/gopacket/layers/tls.go b/vendor/github.com/google/gopacket/layers/tls.go
new file mode 100644
index 0000000..ddb6ff9
--- /dev/null
+++ b/vendor/github.com/google/gopacket/layers/tls.go
@@ -0,0 +1,208 @@
+// Copyright 2018 The GoPacket Authors. 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"
+)
+
+// TLSType defines the type of data after the TLS Record
+type TLSType uint8
+
+// TLSType known values.
+const (
+ TLSChangeCipherSpec TLSType = 20
+ TLSAlert TLSType = 21
+ TLSHandshake TLSType = 22
+ TLSApplicationData TLSType = 23
+ TLSUnknown TLSType = 255
+)
+
+// String shows the register type nicely formatted
+func (tt TLSType) String() string {
+ switch tt {
+ default:
+ return "Unknown"
+ case TLSChangeCipherSpec:
+ return "Change Cipher Spec"
+ case TLSAlert:
+ return "Alert"
+ case TLSHandshake:
+ return "Handshake"
+ case TLSApplicationData:
+ return "Application Data"
+ }
+}
+
+// TLSVersion represents the TLS version in numeric format
+type TLSVersion uint16
+
+// Strings shows the TLS version nicely formatted
+func (tv TLSVersion) String() string {
+ switch tv {
+ default:
+ return "Unknown"
+ case 0x0200:
+ return "SSL 2.0"
+ case 0x0300:
+ return "SSL 3.0"
+ case 0x0301:
+ return "TLS 1.0"
+ case 0x0302:
+ return "TLS 1.1"
+ case 0x0303:
+ return "TLS 1.2"
+ case 0x0304:
+ return "TLS 1.3"
+ }
+}
+
+// TLS is specified in RFC 5246
+//
+// TLS Record Protocol
+// 0 1 2 3 4 5 6 7 8
+// +--+--+--+--+--+--+--+--+
+// | Content Type |
+// +--+--+--+--+--+--+--+--+
+// | Version (major) |
+// +--+--+--+--+--+--+--+--+
+// | Version (minor) |
+// +--+--+--+--+--+--+--+--+
+// | Length |
+// +--+--+--+--+--+--+--+--+
+// | Length |
+// +--+--+--+--+--+--+--+--+
+
+// TLS is actually a slide of TLSrecord structures
+type TLS struct {
+ BaseLayer
+
+ // TLS Records
+ ChangeCipherSpec []TLSChangeCipherSpecRecord
+ Handshake []TLSHandshakeRecord
+ AppData []TLSAppDataRecord
+ Alert []TLSAlertRecord
+}
+
+// TLSRecordHeader contains all the information that each TLS Record types should have
+type TLSRecordHeader struct {
+ ContentType TLSType
+ Version TLSVersion
+ Length uint16
+}
+
+// LayerType returns gopacket.LayerTypeTLS.
+func (t *TLS) LayerType() gopacket.LayerType { return LayerTypeTLS }
+
+// decodeTLS decodes the byte slice into a TLS type. It also
+// setups the application Layer in PacketBuilder.
+func decodeTLS(data []byte, p gopacket.PacketBuilder) error {
+ t := &TLS{}
+ err := t.DecodeFromBytes(data, p)
+ if err != nil {
+ return err
+ }
+ p.AddLayer(t)
+ p.SetApplicationLayer(t)
+ return nil
+}
+
+// DecodeFromBytes decodes the slice into the TLS struct.
+func (t *TLS) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error {
+ t.BaseLayer.Contents = data
+ t.BaseLayer.Payload = nil
+
+ t.ChangeCipherSpec = t.ChangeCipherSpec[:0]
+ t.Handshake = t.Handshake[:0]
+ t.AppData = t.AppData[:0]
+ t.Alert = t.Alert[:0]
+
+ return t.decodeTLSRecords(data, df)
+}
+
+func (t *TLS) decodeTLSRecords(data []byte, df gopacket.DecodeFeedback) error {
+ if len(data) < 5 {
+ df.SetTruncated()
+ return errors.New("TLS record too short")
+ }
+
+ // since there are no further layers, the baselayer's content is
+ // pointing to this layer
+ t.BaseLayer = BaseLayer{Contents: data[:len(data)]}
+
+ var h TLSRecordHeader
+ h.ContentType = TLSType(data[0])
+ h.Version = TLSVersion(binary.BigEndian.Uint16(data[1:3]))
+ h.Length = binary.BigEndian.Uint16(data[3:5])
+
+ if h.ContentType.String() == "Unknown" {
+ return errors.New("Unknown TLS record type")
+ }
+
+ hl := 5 // header length
+ tl := hl + int(h.Length)
+ if len(data) < tl {
+ df.SetTruncated()
+ return errors.New("TLS packet length mismatch")
+ }
+
+ switch h.ContentType {
+ default:
+ return errors.New("Unknown TLS record type")
+ case TLSChangeCipherSpec:
+ var r TLSChangeCipherSpecRecord
+ e := r.decodeFromBytes(h, data[hl:tl], df)
+ if e != nil {
+ return e
+ }
+ t.ChangeCipherSpec = append(t.ChangeCipherSpec, r)
+ case TLSAlert:
+ var r TLSAlertRecord
+ e := r.decodeFromBytes(h, data[hl:tl], df)
+ if e != nil {
+ return e
+ }
+ t.Alert = append(t.Alert, r)
+ case TLSHandshake:
+ var r TLSHandshakeRecord
+ e := r.decodeFromBytes(h, data[hl:tl], df)
+ if e != nil {
+ return e
+ }
+ t.Handshake = append(t.Handshake, r)
+ case TLSApplicationData:
+ var r TLSAppDataRecord
+ e := r.decodeFromBytes(h, data[hl:tl], df)
+ if e != nil {
+ return e
+ }
+ t.AppData = append(t.AppData, r)
+ }
+
+ if len(data) == tl {
+ return nil
+ }
+ return t.decodeTLSRecords(data[tl:len(data)], df)
+}
+
+// CanDecode implements gopacket.DecodingLayer.
+func (t *TLS) CanDecode() gopacket.LayerClass {
+ return LayerTypeTLS
+}
+
+// NextLayerType implements gopacket.DecodingLayer.
+func (t *TLS) NextLayerType() gopacket.LayerType {
+ return gopacket.LayerTypeZero
+}
+
+// Payload returns nil, since TLS encrypted payload is inside TLSAppDataRecord
+func (t *TLS) Payload() []byte {
+ return nil
+}