val get_reserved : Cstruct.t -> Cstruct.uint32val set_reserved : Cstruct.t -> Cstruct.uint32 -> unitval get_target : Cstruct.t -> Ipaddr.V6.tval set_target : Cstruct.t -> Ipaddr.V6.t -> unitval get_first_reserved_byte : Cstruct.t -> Cstruct.uint8val get_router : Cstruct.t -> boolval get_solicited : Cstruct.t -> boolval get_override : Cstruct.t -> bool