/* * Copyright (c) 2010-2012 OTClient * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "connection.h" #include #include #include asio::io_service g_ioService; Connection::Connection() : m_readTimer(g_ioService), m_writeTimer(g_ioService), m_resolver(g_ioService), m_socket(g_ioService) { m_connected = false; m_connecting = false; m_sendBufferSize = 0; } Connection::~Connection() { assert(!g_app.isTermianted()); close(); } void Connection::poll() { g_ioService.poll(); g_ioService.reset(); } void Connection::terminate() { g_ioService.stop(); } void Connection::connect(const std::string& host, uint16 port, const std::function& connectCallback) { m_connected = false; m_connecting = true; m_error.clear(); m_connectCallback = connectCallback; asio::ip::tcp::resolver::query query(host, stdext::unsafe_cast(port)); auto weakSelf = ConnectionWeakPtr(shared_from_this()); m_resolver.async_resolve(query, [=](const boost::system::error_code& error, asio::ip::tcp::resolver::iterator endpointIterator) { if(!weakSelf.lock()) return; m_readTimer.cancel(); if(!error) { m_socket.async_connect(*endpointIterator, std::bind(&Connection::onConnect, shared_from_this(), std::placeholders::_1)); m_readTimer.expires_from_now(boost::posix_time::seconds(READ_TIMEOUT)); m_readTimer.async_wait(std::bind(&Connection::onTimeout, shared_from_this(), std::placeholders::_1)); } else handleError(error); }); m_readTimer.expires_from_now(boost::posix_time::seconds(READ_TIMEOUT)); m_readTimer.async_wait(std::bind(&Connection::onTimeout, shared_from_this(), std::placeholders::_1)); } void Connection::close() { if(!m_connected && !m_connecting) return; // flush send data before disconnecting on clean connections if(m_connected && !m_error && m_sendBufferSize > 0 && m_sendEvent) m_sendEvent->execute(); m_connecting = false; m_connected = false; m_connectCallback = nullptr; m_errorCallback = nullptr; m_recvCallback = nullptr; m_resolver.cancel(); m_readTimer.cancel(); m_writeTimer.cancel(); if(m_socket.is_open()) { boost::system::error_code ec; m_socket.shutdown(boost::asio::ip::tcp::socket::shutdown_both, ec); m_socket.close(); } } void Connection::write(uint8* buffer, uint16 size) { if(!m_connected) return; // send old buffer if we can't add more data if(m_sendBufferSize + size >= SEND_BUFFER_SIZE && m_sendEvent) m_sendEvent->execute(); // we can't send the data right away, otherwise we could create tcp congestion memcpy(m_sendBuffer + m_sendBufferSize, buffer, size); m_sendBufferSize += size; if(!m_sendEvent || m_sendEvent->isExecuted() || m_sendEvent->isCanceled()) { auto weakSelf = ConnectionWeakPtr(shared_from_this()); // wait 1 ms to do the real send m_sendEvent = g_eventDispatcher.scheduleEvent([=] { if(!weakSelf.lock()) return; //m_writeTimer.cancel(); asio::async_write(m_socket, asio::buffer(m_sendBuffer, m_sendBufferSize), std::bind(&Connection::onWrite, shared_from_this(), std::placeholders::_1, std::placeholders::_2)); m_writeTimer.expires_from_now(boost::posix_time::seconds(WRITE_TIMEOUT)); m_writeTimer.async_wait(std::bind(&Connection::onTimeout, shared_from_this(), std::placeholders::_1)); m_sendBufferSize = 0; }, SEND_INTERVAL); } } void Connection::read(uint16 bytes, const RecvCallback& callback) { m_readTimer.cancel(); if(!m_connected) return; m_recvCallback = callback; asio::async_read(m_socket, asio::buffer(m_recvBuffer, bytes), std::bind(&Connection::onRecv, shared_from_this(), std::placeholders::_1, bytes)); m_readTimer.expires_from_now(boost::posix_time::seconds(READ_TIMEOUT)); m_readTimer.async_wait(std::bind(&Connection::onTimeout, shared_from_this(), std::placeholders::_1)); } void Connection::read_some(const RecvCallback& callback) { m_readTimer.cancel(); if(!m_connected) return; m_recvCallback = callback; m_socket.async_read_some(asio::buffer(m_recvBuffer, RECV_BUFFER_SIZE), std::bind(&Connection::onRecv, shared_from_this(), std::placeholders::_1, std::placeholders::_2)); m_readTimer.expires_from_now(boost::posix_time::seconds(READ_TIMEOUT)); m_readTimer.async_wait(std::bind(&Connection::onTimeout, shared_from_this(), std::placeholders::_1)); } void Connection::onConnect(const boost::system::error_code& error) { m_readTimer.cancel(); if(!error) { m_connected = true; // disable nagle's algorithm, this make the game play smoother boost::asio::ip::tcp::no_delay option(true); m_socket.set_option(option); if(m_connectCallback) m_connectCallback(); } else handleError(error); m_connecting = false; } void Connection::onWrite(const boost::system::error_code& error, size_t) { m_writeTimer.cancel(); if(!m_connected) return; if(error) handleError(error); } void Connection::onRecv(const boost::system::error_code& error, size_t recvSize) { m_readTimer.cancel(); if(!m_connected) return; if(!error) { if(m_recvCallback) m_recvCallback(m_recvBuffer, recvSize); } else handleError(error); } void Connection::onTimeout(const boost::system::error_code& error) { if(error != asio::error::operation_aborted) handleError(asio::error::timed_out); } void Connection::handleError(const boost::system::error_code& error) { if(error != asio::error::operation_aborted) { m_error = error; if(m_errorCallback) m_errorCallback(error); if(m_connected || m_connecting) close(); } }