116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
/*
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* This file is part of the Flowee project
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* Copyright (C) 2021-2026 Tom Zander <tom@flowee.org>
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*
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* This program 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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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ConnectionAuthorizer.h"
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#include <streaming/MessageParser.h>
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constexpr int INTRODUCTION_TIMEOUT = 4; // in seconds
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ConnectionAuthorizer::ConnectionAuthorizer(boost::asio::io_context &context)
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: m_timerRunning(false),
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m_newConTimer(context)
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{
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}
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ConnectionAuthorizer::~ConnectionAuthorizer()
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{
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}
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void ConnectionAuthorizer::newConnection(NetworkConnection &con)
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{
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if (!accept(con.endPoint())) {
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logWarning() << "Rejected incoming connection based on endpoint.";
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return;
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}
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con.setOnIncomingMessage(std::bind(&ConnectionAuthorizer::onIncomingMessage, this, std::placeholders::_1));
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{ // lock-scope
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std::unique_lock<std::mutex> lock(m_lock);
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m_openConnections.push_back(IncomingConnection(std::move(con)));
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if (!m_timerRunning) {
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m_timerRunning = true;
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m_newConTimer.expires_after(std::chrono::seconds(INTRODUCTION_TIMEOUT));
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m_newConTimer.async_wait(std::bind(&ConnectionAuthorizer::checkConnections, this, std::placeholders::_1));
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}
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} // lock-scope
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m_openConnections.back().connection.accept(NetworkConnection::AcceptForLogin);
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}
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bool ConnectionAuthorizer::validateLogin(const Message&)
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{
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return true;
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}
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bool ConnectionAuthorizer::accept(const EndPoint&)
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{
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return true;
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}
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void ConnectionAuthorizer::onIncomingMessage(const Message &message)
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{
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std::unique_lock<std::mutex> lock(m_lock);
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auto iter = m_openConnections.begin();
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while (iter != m_openConnections.end()) {
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if (iter->connection.connectionId() == message.remote) {
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if (!validateLogin(message)) {
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logWarning() << "Rejected connection due to login failure, disconnecting peer:" << message.remote;
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iter->connection.disconnect();
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}
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m_openConnections.erase(iter);
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return;
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}
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++iter;
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}
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}
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void ConnectionAuthorizer::checkConnections(boost::system::error_code error)
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{
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if (error.value() == boost::asio::error::operation_aborted)
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return;
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std::unique_lock<std::mutex> lock(m_lock);
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const auto limit = time(nullptr) - INTRODUCTION_TIMEOUT; // everything created before limit is too old
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auto iter = m_openConnections.begin();
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while (iter != m_openConnections.end()) {
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if (iter->connectedTime <= limit) {
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logWarning() << "Login-timeout, disconnecting peer:" << iter->connection.connectionId();
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iter->connection.disconnect();
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iter = m_openConnections.erase(iter);
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} else {
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++iter;
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}
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}
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// restart timer if there is still something left.
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if (!m_openConnections.empty()) {
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m_timerRunning = true;
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m_newConTimer.expires_after(std::chrono::seconds(2));
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m_newConTimer.async_wait(std::bind(&ConnectionAuthorizer::checkConnections, this, std::placeholders::_1));
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} else {
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m_timerRunning = false;
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}
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}
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// ---------------------------------------------------------------
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ConnectionAuthorizer::IncomingConnection::IncomingConnection(NetworkConnection && con)
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: connection(std::move(con))
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{
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connectedTime = time(nullptr);
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}
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