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58 lines
1.6 KiB
58 lines
1.6 KiB
// Copyright 2012 Google, Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license
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// that can be found in the LICENSE file in the root of the source
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// tree.
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package layers
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import (
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"encoding/binary"
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"github.com/google/gopacket"
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)
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// EAPOL defines an EAP over LAN (802.1x) layer.
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type EAPOL struct {
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BaseLayer
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Version uint8
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Type EAPOLType
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Length uint16
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}
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// LayerType returns LayerTypeEAPOL.
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func (e *EAPOL) LayerType() gopacket.LayerType { return LayerTypeEAPOL }
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// DecodeFromBytes decodes the given bytes into this layer.
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func (e *EAPOL) DecodeFromBytes(data []byte, df gopacket.DecodeFeedback) error {
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e.Version = data[0]
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e.Type = EAPOLType(data[1])
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e.Length = binary.BigEndian.Uint16(data[2:4])
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e.BaseLayer = BaseLayer{data[:4], data[4:]}
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return nil
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}
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// SerializeTo writes the serialized form of this layer into the
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// SerializationBuffer, implementing gopacket.SerializableLayer
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func (e *EAPOL) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error {
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bytes, _ := b.PrependBytes(4)
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bytes[0] = e.Version
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bytes[1] = byte(e.Type)
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binary.BigEndian.PutUint16(bytes[2:], e.Length)
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return nil
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}
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// CanDecode returns the set of layer types that this DecodingLayer can decode.
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func (e *EAPOL) CanDecode() gopacket.LayerClass {
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return LayerTypeEAPOL
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}
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// NextLayerType returns the layer type contained by this DecodingLayer.
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func (e *EAPOL) NextLayerType() gopacket.LayerType {
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return e.Type.LayerType()
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}
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func decodeEAPOL(data []byte, p gopacket.PacketBuilder) error {
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e := &EAPOL{}
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return decodingLayerDecoder(e, data, p)
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}
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