Full Distribution

src/server.cpp

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+/**
+ * Tibia GIMUD Server - a free and open-source MMORPG server emulator
+ * Copyright (C) 2017  Alejandro Mujica <alejandrodemujica@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "otpch.h"
+
+#include "outputmessage.h"
+#include "server.h"
+#include "scheduler.h"
+#include "configmanager.h"
+#include "ban.h"
+
+extern ConfigManager g_config;
+Ban g_bans;
+
+ServiceManager::~ServiceManager()
+{
+	stop();
+}
+
+void ServiceManager::die()
+{
+	io_service.stop();
+}
+
+void ServiceManager::run()
+{
+	assert(!running);
+	running = true;
+	io_service.run();
+}
+
+void ServiceManager::stop()
+{
+	if (!running) {
+		return;
+	}
+
+	running = false;
+
+	for (auto& servicePortIt : acceptors) {
+		try {
+			io_service.post(std::bind(&ServicePort::onStopServer, servicePortIt.second));
+		} catch (boost::system::system_error& e) {
+			std::cout << "[ServiceManager::stop] Network Error: " << e.what() << std::endl;
+		}
+	}
+
+	acceptors.clear();
+
+	death_timer.expires_from_now(boost::posix_time::seconds(3));
+	death_timer.async_wait(std::bind(&ServiceManager::die, this));
+}
+
+ServicePort::~ServicePort()
+{
+	close();
+}
+
+bool ServicePort::is_single_socket() const
+{
+	return !services.empty() && services.front()->is_single_socket();
+}
+
+std::string ServicePort::get_protocol_names() const
+{
+	if (services.empty()) {
+		return std::string();
+	}
+
+	std::string str = services.front()->get_protocol_name();
+	for (size_t i = 1; i < services.size(); ++i) {
+		str.push_back(',');
+		str.push_back(' ');
+		str.append(services[i]->get_protocol_name());
+	}
+	return str;
+}
+
+void ServicePort::accept()
+{
+	if (!acceptor) {
+		return;
+	}
+
+	auto connection = ConnectionManager::getInstance().createConnection(io_service, shared_from_this());
+	acceptor->async_accept(connection->getSocket(), std::bind(&ServicePort::onAccept, shared_from_this(), connection, std::placeholders::_1));
+}
+
+void ServicePort::onAccept(Connection_ptr connection, const boost::system::error_code& error)
+{
+	if (!error) {
+		if (services.empty()) {
+			return;
+		}
+
+		auto remote_ip = connection->getIP();
+		if (remote_ip != 0 && g_bans.acceptConnection(remote_ip)) {
+			Service_ptr service = services.front();
+			if (service->is_single_socket()) {
+				connection->accept(service->make_protocol(connection));
+			} else {
+				connection->accept();
+			}
+		} else {
+			connection->close(Connection::FORCE_CLOSE);
+		}
+
+		accept();
+	} else if (error != boost::asio::error::operation_aborted) {
+		if (!pendingStart) {
+			close();
+			pendingStart = true;
+			g_scheduler.addEvent(createSchedulerTask(15000,
+			                     std::bind(&ServicePort::openAcceptor, std::weak_ptr<ServicePort>(shared_from_this()), serverPort)));
+		}
+	}
+}
+
+Protocol_ptr ServicePort::make_protocol(NetworkMessage& msg, const Connection_ptr& connection) const
+{
+	uint8_t protocolID = msg.getByte();
+	for (auto& service : services) {
+		if (protocolID != service->get_protocol_identifier()) {
+			continue;
+		}
+
+		return service->make_protocol(connection);
+	}
+	return nullptr;
+}
+
+void ServicePort::onStopServer()
+{
+	close();
+}
+
+void ServicePort::openAcceptor(std::weak_ptr<ServicePort> weak_service, uint16_t port)
+{
+	if (auto service = weak_service.lock()) {
+		service->open(port);
+	}
+}
+
+void ServicePort::open(uint16_t port)
+{
+	close();
+
+	serverPort = port;
+	pendingStart = false;
+
+	try {
+		if (g_config.getBoolean(ConfigManager::BIND_ONLY_GLOBAL_ADDRESS)) {
+			acceptor.reset(new boost::asio::ip::tcp::acceptor(io_service, boost::asio::ip::tcp::endpoint(
+			            boost::asio::ip::address(boost::asio::ip::address_v4::from_string(g_config.getString(ConfigManager::IP))), serverPort)));
+		} else {
+			acceptor.reset(new boost::asio::ip::tcp::acceptor(io_service, boost::asio::ip::tcp::endpoint(
+			            boost::asio::ip::address(boost::asio::ip::address_v4(INADDR_ANY)), serverPort)));
+		}
+
+		acceptor->set_option(boost::asio::ip::tcp::no_delay(true));
+
+		accept();
+	} catch (boost::system::system_error& e) {
+		std::cout << "[ServicePort::open] Error: " << e.what() << std::endl;
+
+		pendingStart = true;
+		g_scheduler.addEvent(createSchedulerTask(15000,
+		                     std::bind(&ServicePort::openAcceptor, std::weak_ptr<ServicePort>(shared_from_this()), port)));
+	}
+}
+
+void ServicePort::close()
+{
+	if (acceptor && acceptor->is_open()) {
+		boost::system::error_code error;
+		acceptor->close(error);
+	}
+}
+
+bool ServicePort::add_service(const Service_ptr& new_svc)
+{
+	if (std::any_of(services.begin(), services.end(), [](const Service_ptr& svc) {return svc->is_single_socket();})) {
+		return false;
+	}
+
+	services.push_back(new_svc);
+	return true;
+}