pkt

%% Copyright (c) 2013-2015, Michael Santos <michael.santos@gmail.com>
%% All rights reserved.
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%% modification, are permitted provided that the following conditions
%% are met:
%%
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%% Redistributions in binary form must reproduce the above copyright
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%% POSSIBILITY OF SUCH DAMAGE.
-module(pkt_ipv6_esp).

%% RFC 4303: IP Encapsulating Security Payload (ESP)

-include("pkt_ipproto.hrl").
-include("pkt_ipv6.hrl").

-export([codec/1]).

% XXX TODO
codec(
    <<SPI:32, Seq:32, Rest/binary>>
) ->
    {#ipv6_esp{
        spi = SPI,
        seq = Seq,
        data = Rest,
        pad = <<>>,
        padlen = 0,
        next = 0,
        icv = <<>>
    }, <<>>};
codec(#ipv6_esp{
        spi = SPI,
        seq = Seq,
        data = Data,
        pad = Pad,
        padlen = PadLen,
        next = Next,
        icv = ICV
        }) ->
    <<SPI:32, Seq:32, Data/binary, Pad/binary, PadLen:8, Next:8, ICV/binary>>.