func (p *ReusingLayerParser) recycleOne(layer gopacket.DecodingLayer) {
typ := layer.CanDecode().LayerTypes()[0]
lc := p.layerCache[typ]
if lc == nil {
lc = &[]gopacket.DecodingLayer{}
p.layerCache[typ] = lc
}
*lc = append(*lc, layer)
}
func (p *ReusingLayerParser) tryDecode(tp *TypedPayload, oldLayer gopacket.DecodingLayer) (layer gopacket.DecodingLayer, err error) {
if oldLayer != nil && oldLayer.CanDecode().Contains(tp.Type) {
layer = oldLayer
} else {
if oldLayer != nil {
p.recycleOne(oldLayer)
}
if layer, err = p.getDecodingLayer(tp.Type); err != nil {
return
}
}
if err = layer.DecodeFromBytes(tp.Payload, p.df); err != nil {
p.recycleOne(layer)
layer = nil
}
return
}