// UnmarshalBinary allocates a byte slice and marshals a Frame into binary form.
//
// If a VNI value is invalid, ErrInvalidVNI will be returned.
func (f *Frame) UnmarshalBinary(b []byte) error {
// Need at least VXLAN frame and empty Ethernet frame
if len(b) < 18 {
return io.ErrUnexpectedEOF
}
// I flag must be set to 1.
if (b[0] >> 3) != 1 {
return ErrInvalidFrame
}
f.VNI = VNI(binary.BigEndian.Uint32(b[3:]))
ef := new(ethernet.Frame)
if err := ef.UnmarshalFCS(b[8:]); err != nil {
return err
}
f.Ethernet = ef
return nil
}
