%%% Copyright (c) 2011-2022 Michael Santos <michael.santos@gmail.com>. All
%%% rights reserved.
%%% Copyright (c) 2013, YAMAMOTO Takashi
%%% All rights reserved.
%%%
%%% Redistribution and use in source and binary forms, with or without
%%% modification, are permitted provided that the following conditions
%%% are met:
%%%
%%% 1. Redistributions of source code must retain the above copyright notice,
%%% this list of conditions and the following disclaimer.
%%%
%%% 2. Redistributions in binary form must reproduce the above copyright
%%% notice, this list of conditions and the following disclaimer in the
%%% documentation and/or other materials provided with the distribution.
%%%
%%% 3. Neither the name of the copyright holder nor the names of its
%%% contributors may be used to endorse or promote products derived from
%%% this software without specific prior written permission.
%%%
%%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
%%% "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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-module(tunctl_netbsd).

%% NOTE: On NetBSD, tap(4) and tun(4) are separate drivers.
%% The former, which this module deals with, is always "no_pi".
%% http://netbsd.gw.com/cgi-bin/man-cgi?tap
%% http://netbsd.gw.com/cgi-bin/man-cgi?tun

-include("tuntap.hrl").

-include_lib("procket/include/ioctl.hrl").
-include_lib("procket/include/procket.hrl").

-export([
    create/2,
    persist/2,
    owner/2,
    group/2
]).

%%--------------------------------------------------------------------
%%% Exports
%%--------------------------------------------------------------------
create(<<>>, Opt) ->
    create(<<"tap0">>, Opt);
create(Ifname, Opt) when byte_size(Ifname) < ?IFNAMSIZ, is_list(Opt) ->
    case proplists:get_bool(no_pi, Opt) of
        true ->
            case procket:dev(binary_to_list(Ifname)) of
                {ok, FD} ->
                    {ok, FD, Ifname};
                Error ->
                    Error
            end;
        false ->
            {error, unsupported}
    end.

%% N/A
persist(_FD, _Status) ->
    ok.

owner(_FD, _Owner) ->
    ok.

group(__FD, _Group) ->
    ok.

%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------