val get_checksum : Cstruct.t -> Cstruct.uint16
val set_checksum : Cstruct.t -> Cstruct.uint16 -> unit
val get_reserved : Cstruct.t -> Cstruct.uint32
val set_reserved : Cstruct.t -> Cstruct.uint32 -> unit
val get_target : Cstruct.t -> Ipaddr.V6.t
val set_target : Cstruct.t -> Ipaddr.V6.t -> unit