mirror of
https://github.com/vcmi/vcmi.git
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359 lines
8.1 KiB
C++
359 lines
8.1 KiB
C++
/*
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* Connection.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 "Connection.h"
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#include "../networkPacks/NetPacksBase.h"
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#include <boost/asio.hpp>
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VCMI_LIB_NAMESPACE_BEGIN
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using namespace boost;
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using namespace boost::asio::ip;
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struct ConnectionBuffers
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{
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boost::asio::streambuf readBuffer;
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boost::asio::streambuf writeBuffer;
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};
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void CConnection::init()
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{
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enableBufferedWrite = false;
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enableBufferedRead = false;
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connectionBuffers = std::make_unique<ConnectionBuffers>();
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socket->set_option(boost::asio::ip::tcp::no_delay(true));
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try
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{
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socket->set_option(boost::asio::socket_base::send_buffer_size(4194304));
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socket->set_option(boost::asio::socket_base::receive_buffer_size(4194304));
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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 socket option: %s", e.what());
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}
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enableSmartPointerSerialization();
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disableStackSendingByID();
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#ifndef VCMI_ENDIAN_BIG
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myEndianess = true;
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#else
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myEndianess = false;
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#endif
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connected = true;
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std::string pom;
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//we got connection
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oser & std::string("Aiya!\n") & name & uuid & myEndianess; //identify ourselves
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iser & pom & pom & contactUuid & contactEndianess;
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logNetwork->info("Established connection with %s. UUID: %s", pom, contactUuid);
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mutexRead = std::make_shared<boost::mutex>();
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mutexWrite = std::make_shared<boost::mutex>();
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iser.fileVersion = SERIALIZATION_VERSION;
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}
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CConnection::CConnection(const std::string & host, ui16 port, std::string Name, std::string UUID):
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io_service(std::make_shared<asio::io_service>()),
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iser(this),
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oser(this),
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name(std::move(Name)),
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uuid(std::move(UUID))
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{
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int i = 0;
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boost::system::error_code error = asio::error::host_not_found;
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socket = std::make_shared<tcp::socket>(*io_service);
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tcp::resolver resolver(*io_service);
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tcp::resolver::iterator end;
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tcp::resolver::iterator pom;
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tcp::resolver::iterator endpoint_iterator = resolver.resolve(tcp::resolver::query(host, std::to_string(port)), error);
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if(error)
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{
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logNetwork->error("Problem with resolving: \n%s", error.message());
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throw std::runtime_error("Problem with resolving");
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}
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pom = endpoint_iterator;
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if(pom != end)
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logNetwork->info("Found endpoints:");
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else
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{
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logNetwork->error("Critical problem: No endpoints found!");
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throw std::runtime_error("No endpoints found!");
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}
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while(pom != end)
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{
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logNetwork->info("\t%d:%s", i, (boost::asio::ip::tcp::endpoint&)*pom);
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pom++;
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}
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i=0;
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while(endpoint_iterator != end)
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{
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logNetwork->info("Trying connection to %s(%d)", (boost::asio::ip::tcp::endpoint&)*endpoint_iterator, i++);
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socket->connect(*endpoint_iterator, error);
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if(!error)
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{
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init();
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return;
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}
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else
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{
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throw std::runtime_error("Failed to connect!");
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}
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endpoint_iterator++;
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}
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}
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CConnection::CConnection(std::shared_ptr<TSocket> Socket, std::string Name, std::string UUID):
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iser(this),
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oser(this),
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socket(std::move(Socket)),
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name(std::move(Name)),
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uuid(std::move(UUID))
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{
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init();
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}
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CConnection::CConnection(const std::shared_ptr<TAcceptor> & acceptor,
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const std::shared_ptr<boost::asio::io_service> & io_service,
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std::string Name,
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std::string UUID):
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io_service(io_service),
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iser(this),
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oser(this),
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name(std::move(Name)),
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uuid(std::move(UUID))
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{
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boost::system::error_code error = asio::error::host_not_found;
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socket = std::make_shared<tcp::socket>(*io_service);
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acceptor->accept(*socket,error);
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if (error)
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{
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logNetwork->error("Error on accepting: %s", error.message());
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socket.reset();
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throw std::runtime_error("Can't establish connection :(");
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}
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init();
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}
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void CConnection::flushBuffers()
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{
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if(!enableBufferedWrite)
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return;
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try
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{
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asio::write(*socket, connectionBuffers->writeBuffer);
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}
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catch(...)
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{
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//connection has been lost
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connected = false;
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throw;
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}
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enableBufferedWrite = false;
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}
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int CConnection::write(const void * data, unsigned size)
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{
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try
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{
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if(enableBufferedWrite)
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{
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std::ostream ostream(&connectionBuffers->writeBuffer);
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ostream.write(static_cast<const char *>(data), size);
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return size;
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}
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int ret = static_cast<int>(asio::write(*socket, asio::const_buffers_1(asio::const_buffer(data, size))));
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return ret;
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}
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catch(...)
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{
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//connection has been lost
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connected = false;
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throw;
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}
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}
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int CConnection::read(void * data, unsigned size)
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{
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try
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{
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if(enableBufferedRead)
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{
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auto available = connectionBuffers->readBuffer.size();
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while(available < size)
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{
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auto bytesRead = socket->read_some(connectionBuffers->readBuffer.prepare(1024));
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connectionBuffers->readBuffer.commit(bytesRead);
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available = connectionBuffers->readBuffer.size();
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}
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std::istream istream(&connectionBuffers->readBuffer);
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istream.read(static_cast<char *>(data), size);
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return size;
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}
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int ret = static_cast<int>(asio::read(*socket,asio::mutable_buffers_1(asio::mutable_buffer(data,size))));
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return ret;
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}
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catch(...)
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{
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//connection has been lost
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connected = false;
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throw;
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}
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}
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CConnection::~CConnection()
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{
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close();
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if(handler)
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{
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// ugly workaround to avoid self-join if last strong reference to shared_ptr that owns this class has been released in this very thread, e.g. on netpack processing
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if (boost::this_thread::get_id() != handler->get_id())
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handler->join();
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else
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handler->detach();
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}
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}
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template<class T>
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CConnection & CConnection::operator&(const T &t) {
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// throw std::exception();
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//XXX this is temporaly ? solution to fix gcc (4.3.3, other?) compilation
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// problem for more details contact t0@czlug.icis.pcz.pl or impono@gmail.com
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// do not remove this exception it shoudnt be called
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return *this;
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}
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void CConnection::close()
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{
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if(socket)
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{
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try
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{
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socket->shutdown(boost::asio::ip::tcp::socket::shutdown_receive);
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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 closing socket: %s", e.what());
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}
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socket->close();
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socket.reset();
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}
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}
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bool CConnection::isOpen() const
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{
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return socket && connected;
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}
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void CConnection::reportState(vstd::CLoggerBase * out)
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{
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out->debug("CConnection");
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if(socket && socket->is_open())
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{
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out->debug("\tWe have an open and valid socket");
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out->debug("\t %d bytes awaiting", socket->available());
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}
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}
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CPack * CConnection::retrievePack()
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{
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enableBufferedRead = true;
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CPack * pack = nullptr;
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boost::unique_lock<boost::mutex> lock(*mutexRead);
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iser & pack;
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logNetwork->trace("Received CPack of type %s", (pack ? typeid(*pack).name() : "nullptr"));
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if(pack == nullptr)
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logNetwork->error("Received a nullptr CPack! You should check whether client and server ABI matches.");
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enableBufferedRead = false;
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return pack;
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}
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void CConnection::sendPack(const CPack * pack)
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{
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boost::unique_lock<boost::mutex> lock(*mutexWrite);
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logNetwork->trace("Sending a pack of type %s", typeid(*pack).name());
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enableBufferedWrite = true;
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oser & pack;
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flushBuffers();
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}
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void CConnection::disableStackSendingByID()
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{
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CSerializer::sendStackInstanceByIds = false;
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}
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void CConnection::enableStackSendingByID()
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{
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CSerializer::sendStackInstanceByIds = true;
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}
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void CConnection::disableSmartPointerSerialization()
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{
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iser.smartPointerSerialization = oser.smartPointerSerialization = false;
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}
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void CConnection::enableSmartPointerSerialization()
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{
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iser.smartPointerSerialization = oser.smartPointerSerialization = true;
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}
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void CConnection::enterLobbyConnectionMode()
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{
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iser.loadedPointers.clear();
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oser.savedPointers.clear();
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disableSmartVectorMemberSerialization();
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disableSmartPointerSerialization();
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}
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void CConnection::enterGameplayConnectionMode(CGameState * gs)
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{
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enableStackSendingByID();
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disableSmartPointerSerialization();
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addStdVecItems(gs);
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}
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void CConnection::disableSmartVectorMemberSerialization()
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{
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CSerializer::smartVectorMembersSerialization = false;
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}
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void CConnection::enableSmartVectorMemberSerializatoin()
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{
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CSerializer::smartVectorMembersSerialization = true;
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}
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std::string CConnection::toString() const
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{
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boost::format fmt("Connection with %s (ID: %d UUID: %s)");
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fmt % name % connectionID % uuid;
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return fmt.str();
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}
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VCMI_LIB_NAMESPACE_END
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