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42 lines
1.0 KiB
42 lines
1.0 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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"github.com/google/gopacket"
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"net"
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)
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// FDDI contains the header for FDDI frames.
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type FDDI struct {
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BaseLayer
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FrameControl FDDIFrameControl
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Priority uint8
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SrcMAC, DstMAC net.HardwareAddr
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}
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// LayerType returns LayerTypeFDDI.
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func (f *FDDI) LayerType() gopacket.LayerType { return LayerTypeFDDI }
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// LinkFlow returns a new flow of type EndpointMAC.
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func (f *FDDI) LinkFlow() gopacket.Flow {
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return gopacket.NewFlow(EndpointMAC, f.SrcMAC, f.DstMAC)
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}
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func decodeFDDI(data []byte, p gopacket.PacketBuilder) error {
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f := &FDDI{
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FrameControl: FDDIFrameControl(data[0] & 0xF8),
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Priority: data[0] & 0x07,
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SrcMAC: net.HardwareAddr(data[1:7]),
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DstMAC: net.HardwareAddr(data[7:13]),
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BaseLayer: BaseLayer{data[:13], data[13:]},
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}
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p.SetLinkLayer(f)
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p.AddLayer(f)
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return p.NextDecoder(f.FrameControl)
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}
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