func decodeInGRELayer(data []byte, p gopacket.PacketBuilder) error {
switch (data[0] >> 4) & 0xf {
case 4:
ip4 := &layers.IPv4{}
err := ip4.DecodeFromBytes(data, p)
p.AddLayer(ip4)
p.SetNetworkLayer(ip4)
if err != nil {
return err
}
return p.NextDecoder(ip4.NextLayerType())
case 6:
ip6 := &layers.IPv6{}
err := ip6.DecodeFromBytes(data, p)
p.AddLayer(ip6)
p.SetNetworkLayer(ip6)
if err != nil {
return err
}
return p.NextDecoder(ip6.NextLayerType())
}
packet := gopacket.NewPacket(data, layers.LayerTypeARP, gopacket.Lazy)
layer := packet.Layer(layers.LayerTypeARP)
p.AddLayer(layer)
return nil
}
func decodeIPv4(data []byte, p gopacket.PacketBuilder) error {
ip := &IPv4{}
err := ip.DecodeFromBytes(data, p)
p.AddLayer(ip)
p.SetNetworkLayer(ip)
if err != nil {
return err
}
return p.NextDecoder(ip.NextLayerType())
}
func decodeIPv6(data []byte, p gopacket.PacketBuilder) error {
ip6 := &IPv6{}
err := ip6.DecodeFromBytes(data, p)
p.AddLayer(ip6)
p.SetNetworkLayer(ip6)
if ip6.HopByHop != nil {
p.AddLayer(ip6.HopByHop)
}
if err != nil {
return err
}
if ip6.HopByHop != nil {
return p.NextDecoder(ip6.HopByHop.NextHeader)
}
return p.NextDecoder(ip6.NextHeader)
}
func decodeIPv6(data []byte, p gopacket.PacketBuilder) error {
ip6 := &IPv6{}
err := ip6.DecodeFromBytes(data, p)
p.AddLayer(ip6)
p.SetNetworkLayer(ip6)
if ip6.HopByHop != nil {
// TODO(gconnell): Since HopByHop is now an integral part of the IPv6
// layer, should it actually be added as its own layer? I'm leaning towards
// no.
p.AddLayer(ip6.HopByHop)
}
if err != nil {
return err
}
if ip6.HopByHop != nil {
return p.NextDecoder(ip6.HopByHop.NextHeader)
}
return p.NextDecoder(ip6.NextHeader)
}