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