58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
/*
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* Copyright (C) 2019 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <chrono>
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#include <unordered_map>
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#include <Wt/WDateTime.h>
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#include "core/Exception.hpp"
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#include "core/NetAddress.hpp"
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namespace lms::auth
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{
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class LoginThrottler
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{
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public:
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LoginThrottler(std::size_t maxEntries)
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: _maxEntries{ maxEntries } {}
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// user must lock these calls to avoid races
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bool isClientThrottled(const boost::asio::ip::address& address) const;
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void onBadClientAttempt(const boost::asio::ip::address& address);
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void onGoodClientAttempt(const boost::asio::ip::address& address);
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private:
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void removeOutdatedEntries();
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const std::size_t _maxEntries;
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static constexpr std::size_t _maxBadConsecutiveAttemptCount{ 5 };
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static constexpr std::chrono::seconds _throttlingDuration{ 3 };
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struct AttemptInfo
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{
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Wt::WDateTime nextAttempt;
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std::size_t badConsecutiveAttemptCount{};
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};
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std::unordered_map<boost::asio::ip::address, AttemptInfo> _attemptsInfo;
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};
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} // namespace lms::auth
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