mirror of
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125 lines
3.3 KiB
C++
125 lines
3.3 KiB
C++
/*
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* NetworkConnection.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "NetworkConnection.h"
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VCMI_LIB_NAMESPACE_BEGIN
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NetworkConnection::NetworkConnection(INetworkConnectionListener & listener, const std::shared_ptr<NetworkSocket> & socket)
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: socket(socket)
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, listener(listener)
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{
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socket->set_option(boost::asio::ip::tcp::no_delay(true));
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// iOS throws exception on attempt to set buffer size
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constexpr auto bufferSize = 4 * 1024 * 1024;
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try
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{
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socket->set_option(boost::asio::socket_base::send_buffer_size{bufferSize});
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}
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catch(const boost::system::system_error & e)
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{
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logNetwork->error("error setting 'send buffer size' socket option: %s", e.what());
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}
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try
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{
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socket->set_option(boost::asio::socket_base::receive_buffer_size{bufferSize});
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}
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catch(const boost::system::system_error & e)
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{
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logNetwork->error("error setting 'receive buffer size' socket option: %s", e.what());
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}
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}
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void NetworkConnection::start()
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{
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boost::asio::async_read(*socket,
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readBuffer,
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boost::asio::transfer_exactly(messageHeaderSize),
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[self = shared_from_this()](const auto & ec, const auto & endpoint) { self->onHeaderReceived(ec); });
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}
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void NetworkConnection::onHeaderReceived(const boost::system::error_code & ecHeader)
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{
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if (ecHeader)
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{
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listener.onDisconnected(shared_from_this(), ecHeader.message());
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return;
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}
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if (readBuffer.size() < messageHeaderSize)
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throw std::runtime_error("Failed to read header!");
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uint32_t messageSize;
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readBuffer.sgetn(reinterpret_cast<char *>(&messageSize), sizeof(messageSize));
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if (messageSize > messageMaxSize)
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{
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listener.onDisconnected(shared_from_this(), "Invalid packet size!");
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return;
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}
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if (messageSize == 0)
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{
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listener.onDisconnected(shared_from_this(), "Zero-sized packet!");
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return;
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}
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boost::asio::async_read(*socket,
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readBuffer,
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boost::asio::transfer_exactly(messageSize),
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[self = shared_from_this(), messageSize](const auto & ecPayload, const auto & endpoint) { self->onPacketReceived(ecPayload, messageSize); });
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}
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void NetworkConnection::onPacketReceived(const boost::system::error_code & ec, uint32_t expectedPacketSize)
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{
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if (ec)
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{
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listener.onDisconnected(shared_from_this(), ec.message());
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return;
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}
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if (readBuffer.size() < expectedPacketSize)
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{
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throw std::runtime_error("Failed to read packet!");
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}
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std::vector<std::byte> message(expectedPacketSize);
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readBuffer.sgetn(reinterpret_cast<char *>(message.data()), expectedPacketSize);
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listener.onPacketReceived(shared_from_this(), message);
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start();
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}
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void NetworkConnection::sendPacket(const std::vector<std::byte> & message)
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{
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boost::system::error_code ec;
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// create array with single element - boost::asio::buffer can be constructed from containers, but not from plain integer
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std::array<uint32_t, 1> messageSize{static_cast<uint32_t>(message.size())};
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boost::asio::write(*socket, boost::asio::buffer(messageSize), ec );
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boost::asio::write(*socket, boost::asio::buffer(message), ec );
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//Note: ignoring error code, intended
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}
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void NetworkConnection::close()
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{
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boost::system::error_code ec;
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socket->close(ec);
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//NOTE: ignoring error code, intended
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}
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VCMI_LIB_NAMESPACE_END
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