Marshal (tcpip.Icmpv4_packet.Marshal)

type error = string

val into_cstruct : 
  t ->
  Cstruct.t ->
  payload:Cstruct.t ->
  (unit, error) Stdlib.result

into_cstruct t buf ~payload generates an ICMPv4 header from t and writes it into buf at offset 0. payload is used to calculate the ICMPv4 header checksum, but is not included in the generated buffer. into_cstruct may fail if the buffer is of insufficient size.

val make_cstruct : t -> payload:Cstruct.t -> Cstruct.t

make_cstruct t ~payload allocates, fills, and returns a Cstruct.t with the header information from t. The payload is used to calculate the ICMPv4 header checksum, but is not included in the generated buffer. make_cstruct allocates 8 bytes for the ICMPv4 header.