[VOL-1349] EPON OLT adapter (package B)
Change-Id: I634ef62c53813dcf4456f54948f13e06358e263c
diff --git a/vendor/github.com/google/gopacket/layerclass.go b/vendor/github.com/google/gopacket/layerclass.go
new file mode 100644
index 0000000..775cd09
--- /dev/null
+++ b/vendor/github.com/google/gopacket/layerclass.go
@@ -0,0 +1,107 @@
+// 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 gopacket
+
+// LayerClass is a set of LayerTypes, used for grabbing one of a number of
+// different types from a packet.
+type LayerClass interface {
+ // Contains returns true if the given layer type should be considered part
+ // of this layer class.
+ Contains(LayerType) bool
+ // LayerTypes returns the set of all layer types in this layer class.
+ // Note that this may not be a fast operation on all LayerClass
+ // implementations.
+ LayerTypes() []LayerType
+}
+
+// Contains implements LayerClass.
+func (l LayerType) Contains(a LayerType) bool {
+ return l == a
+}
+
+// LayerTypes implements LayerClass.
+func (l LayerType) LayerTypes() []LayerType {
+ return []LayerType{l}
+}
+
+// LayerClassSlice implements a LayerClass with a slice.
+type LayerClassSlice []bool
+
+// Contains returns true if the given layer type should be considered part
+// of this layer class.
+func (s LayerClassSlice) Contains(t LayerType) bool {
+ return int(t) < len(s) && s[t]
+}
+
+// LayerTypes returns all layer types in this LayerClassSlice.
+// Because of LayerClassSlice's implementation, this could be quite slow.
+func (s LayerClassSlice) LayerTypes() (all []LayerType) {
+ for i := 0; i < len(s); i++ {
+ if s[i] {
+ all = append(all, LayerType(i))
+ }
+ }
+ return
+}
+
+// NewLayerClassSlice creates a new LayerClassSlice by creating a slice of
+// size max(types) and setting slice[t] to true for each type t. Note, if
+// you implement your own LayerType and give it a high value, this WILL create
+// a very large slice.
+func NewLayerClassSlice(types []LayerType) LayerClassSlice {
+ var max LayerType
+ for _, typ := range types {
+ if typ > max {
+ max = typ
+ }
+ }
+ t := make([]bool, int(max+1))
+ for _, typ := range types {
+ t[typ] = true
+ }
+ return t
+}
+
+// LayerClassMap implements a LayerClass with a map.
+type LayerClassMap map[LayerType]bool
+
+// Contains returns true if the given layer type should be considered part
+// of this layer class.
+func (m LayerClassMap) Contains(t LayerType) bool {
+ return m[t]
+}
+
+// LayerTypes returns all layer types in this LayerClassMap.
+func (m LayerClassMap) LayerTypes() (all []LayerType) {
+ for t := range m {
+ all = append(all, t)
+ }
+ return
+}
+
+// NewLayerClassMap creates a LayerClassMap and sets map[t] to true for each
+// type in types.
+func NewLayerClassMap(types []LayerType) LayerClassMap {
+ m := LayerClassMap{}
+ for _, typ := range types {
+ m[typ] = true
+ }
+ return m
+}
+
+// NewLayerClass creates a LayerClass, attempting to be smart about which type
+// it creates based on which types are passed in.
+func NewLayerClass(types []LayerType) LayerClass {
+ for _, typ := range types {
+ if typ > maxLayerType {
+ // NewLayerClassSlice could create a very large object, so instead create
+ // a map.
+ return NewLayerClassMap(types)
+ }
+ }
+ return NewLayerClassSlice(types)
+}