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(*
* Copyright (c) 2019 Anil Madhavapeddy
* Copyright (c) 2014 Nicolás Ojeda Bär
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*)
let try_with_result fn a =
try Ok (fn a)
with Macaddr.Parse_error (msg, _) -> Error (`Msg ("Macaddr: " ^ msg))
let of_cstruct_exn cs =
if Cstruct.length cs <> 6 then
raise (Macaddr.Parse_error ("MAC is exactly 6 bytes", Cstruct.to_string cs))
else Cstruct.to_string cs |> Macaddr.of_octets_exn
let of_cstruct cs = try_with_result of_cstruct_exn cs
let write_cstruct_exn (mac : Macaddr.t) cs =
let len = Cstruct.length cs in
let mac = Macaddr.to_octets mac in
if len <> 6 then raise (Macaddr.Parse_error ("MAC is exactly 6 bytes", mac));
Cstruct.blit_from_string mac 0 cs 0 6
let to_cstruct ?(allocator = Cstruct.create) mac =
let cs = allocator 6 in
write_cstruct_exn mac cs;
cs
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