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|
%%% Copyright (c) 2019, Sunet.
%%% See LICENSE for licensing information.
-module(p11p_config).
-behaviour(gen_server).
%% API
-export([start_link/0]).
%%-export([config/0]).
-export([nameof/1]).
-export([tokens/0]).
-export([proxyapp_bin_path/0, modules_for_token/1, module_path/1, module_env/1,
token_mode/1]).
-export_type([token_mode_t/0]).
%% Genserver callbacks.
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
terminate/2, code_change/3]).
%% Records and types.
-record(p11module, {
name :: string(),
path :: string(),
env :: [{string(), string()}] %FIXME: maches [] too?
}).
-type p11module() :: #p11module{}.
-type token_mode_t() :: {failover, [timeout]} | {balance, [non_neg_integer()]}.
-record(token, {
name :: string(),
mode :: token_mode_t(),
modules = #{} :: #{string() => p11module()}
}).
-type token() :: #token{}.
%% Genserver state.
-record(state, {
proxyapp_bin_path :: string(),
tokens :: #{string() => token()}
}).
%%%%%%%%%%%%%%%%%%%%
%% API.
start_link() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
%% config() ->
%% gen_server:call(?MODULE, config).
proxyapp_bin_path() ->
gen_server:call(?MODULE, proxyapp_bin_path).
-spec tokens() -> [token()].
tokens() ->
gen_server:call(?MODULE, tokens).
-spec token_mode(string()) -> token_mode_t().
token_mode(TokName) ->
gen_server:call(?MODULE, {token_mode, TokName}).
-spec modules_for_token(string()) -> [p11module()].
modules_for_token(TokName) ->
gen_server:call(?MODULE, {modules_for_token, TokName}).
-spec module_path(p11module()) -> string().
module_path(Module) ->
Module#p11module.path.
-spec module_env(p11module()) -> [].
module_env(Module) ->
Module#p11module.env.
nameof(#token{name = Name}) ->
Name;
nameof(#p11module{name = Name}) ->
Name;
nameof(List) ->
[nameof(E) || E <- List].
%%%%%%%%%%%%%%%%%%%%
%% Genserver callbacks.
init(_Args) ->
State = init_state(),
{ok, State}.
%% handle_call(config, _From, State) ->
%% {reply, State, State};
handle_call(proxyapp_bin_path, _From, #state{proxyapp_bin_path = Path} = State) ->
{reply, Path, State};
handle_call(tokens, _From, #state{tokens = Tokens} = State) ->
{reply, maps:values(Tokens), State};
handle_call({modules_for_token, TokName}, _, #state{tokens = Tokens} = S) ->
#{TokName := Token} = Tokens,
{reply, maps:values(Token#token.modules), S};
handle_call({token_mode, TokName}, _, #state{tokens = Tokens} = State) ->
#{TokName := Token} = Tokens,
{reply, Token#token.mode, State};
handle_call(Request, _From, State) ->
lager:warning("Unhandled call: ~p", [Request]),
{reply, unhandled, State}.
handle_cast(Message, State) ->
lager:warning("Unhandled cast: ~p", [Message]),
{noreply, State}.
handle_info(Info, State) ->
lager:warning("Unhandled info: ~p", [Info]),
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVersion, State, _Extra) ->
{ok, State}.
%%%%%%%%%%%%%%%%%%%%
%% Private.
init_state() ->
#state {
proxyapp_bin_path =
application:get_env(p11p, proxyapp_bin_path,
"/usr/local/libexec/p11-kit/p11-kit-remote"),
tokens = conf_tokens(application:get_env(p11p, groups, []))
}.
conf_tokens(L) ->
conf_tokens(L, #{}).
conf_tokens([], Acc) ->
Acc;
conf_tokens([H = {Name, _}|T], Acc) ->
conf_tokens(T, Acc#{Name => new_token(H)}).
-spec new_token({string(), [tuple()]}) -> token().
new_token({Name, Settings}) ->
Modules = conf_modules(proplists:get_value(modules, Settings)),
Mode = mode(proplists:get_value(mode, Settings, {failover, [timeout]}), %FIXME: s/[timeout]/[10]/g or some other sane default?
maps:size(Modules)),
#token{
name = Name,
mode = Mode,
modules = Modules
}.
conf_modules(L) ->
conf_modules(L, #{}).
conf_modules([], Acc) ->
Acc;
conf_modules([{Name, Path}|T], Acc) ->
conf_modules(T, Acc#{Name => new_module(Name, Path, [])});
conf_modules([{Name, Path, Env}|T], Acc) ->
conf_modules(T, Acc#{Name => new_module(Name, Path, Env)}).
new_module(Name, Path, Env) ->
#p11module{
name = Name,
path = Path,
env = Env
}.
-spec mode(p11p_config:token_mode_t(), non_neg_integer()) ->
p11p_config:token_mode_t().
mode({balance, Args}, NModules) ->
{balance, Args ++ [1 || _ <- lists:seq(1, NModules - length(Args))]};
mode(Conf, _) ->
Conf.
%%%%%%%%%%%%%%
%% Unit tests.
-include_lib("eunit/include/eunit.hrl").
tokens_init_test_() ->
{setup,
fun() ->
conf_tokens(
[
{"vtoken0",
[{mode, {balance, [3]}},
{modules, [{"bogusmod0_0", "/path/to/bogusmod0_0"},
{"bogusmod0_1", "/path/to/bogusmod0_1"}
]}]},
{"vtoken1",
[{modules, [{"bogusmod1_0", "/path/to/bogusmod1_0"},
{"bogusmod1_1", "/path/to/bogusmod1_1", [{"MYENV", "myenv"}]}
]}]}
]) end,
fun(_) -> ok end,
fun(Conf) ->
[?_assertEqual(
#{"vtoken0" =>
{token,"vtoken0",
{balance,[3,1]},
#{"bogusmod0_0" =>
{p11module,"bogusmod0_0", "/path/to/bogusmod0_0", []},
"bogusmod0_1" =>
{p11module,"bogusmod0_1", "/path/to/bogusmod0_1", []}}},
"vtoken1" =>
{token,"vtoken1",
{failover,[timeout]},
#{"bogusmod1_0" =>
{p11module,"bogusmod1_0", "/path/to/bogusmod1_0", []},
"bogusmod1_1" =>
{p11module,"bogusmod1_1", "/path/to/bogusmod1_1", [{"MYENV", "myenv"}]}}}
},
Conf)] end}.
%% modules_for_token_test_() ->
%% {setup,
%% fun() ->
|
