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%%% eturnal STUN/TURN server module. |
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%%% |
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%%% Copyright (c) 2020 Holger Weiss <holger@zedat.fu-berlin.de>. |
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%%% Copyright (c) 2020 ProcessOne, SARL. |
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%%% All rights reserved. |
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%%% |
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%%% Licensed under the Apache License, Version 2.0 (the "License"); |
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%%% you may not use this file except in compliance with the License. |
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%%% You may obtain a copy of the License at |
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%%% |
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%%% http://www.apache.org/licenses/LICENSE-2.0 |
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%%% |
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%%% Unless required by applicable law or agreed to in writing, software |
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%%% distributed under the License is distributed on an "AS IS" BASIS, |
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%%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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%%% See the License for the specific language governing permissions and |
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%%% limitations under the License. |
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%%% This module logs STUN queries (or rather, responses). |
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-module(mod_log_stun). |
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-behaviour(eturnal_module). |
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-export([start/0, |
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stop/0, |
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handle_event/2, |
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options/0]). |
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-import(yval, [enum/1]). |
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-include_lib("kernel/include/logger.hrl"). |
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-ifndef(LOG). % Erlang/OTP 21.0. |
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-define(LOG(Level, Format, Args), logger:log(Level, Format, Args)). |
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-endif. |
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%% API. |
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-spec start() -> {ok, eturnal_module:events()}. |
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start() -> |
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?LOG_DEBUG("Starting ~s", [?MODULE]), |
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{ok, [stun_query]}. |
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-spec handle_event(eturnal_module:event(), eturnal_module:info()) -> ok. |
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handle_event(stun_query, #{version := Version}) -> |
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Level = eturnal_module:get_opt(?MODULE, level), |
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?LOG(Level, "Responding to ~s request", [format_protocol(Version)]), |
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ok. |
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-spec stop() -> ok. |
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stop() -> |
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?LOG_DEBUG("Stopping ~s", [?MODULE]), |
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ok. |
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-spec options() -> eturnal_module:options(). |
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options() -> |
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{#{level => enum([critical, error, warning, notice, info, debug])}, |
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[{defaults, |
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#{level => info}}]}. |
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%% Internal functions. |
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-spec format_protocol(old | new) -> binary(). |
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format_protocol(old) -> <<"'classic' STUN">>; |
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format_protocol(new) -> <<"STUN">>. |