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vcmi/lib/serializer/Connection.cpp
2023-06-26 17:15:59 +03:00

353 lines
7.9 KiB
C++

/*
* Connection.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#include "StdInc.h"
#include "Connection.h"
#include "../registerTypes/RegisterTypes.h"
#include "../mapping/CMapHeader.h"
#include <boost/asio.hpp>
VCMI_LIB_NAMESPACE_BEGIN
using namespace boost;
using namespace boost::asio::ip;
struct ConnectionBuffers
{
boost::asio::streambuf readBuffer;
boost::asio::streambuf writeBuffer;
};
void CConnection::init()
{
enableBufferedWrite = false;
enableBufferedRead = false;
connectionBuffers = std::make_unique<ConnectionBuffers>();
socket->set_option(boost::asio::ip::tcp::no_delay(true));
try
{
socket->set_option(boost::asio::socket_base::send_buffer_size(4194304));
socket->set_option(boost::asio::socket_base::receive_buffer_size(4194304));
}
catch (const boost::system::system_error & e)
{
logNetwork->error("error setting socket option: %s", e.what());
}
enableSmartPointerSerialization();
disableStackSendingByID();
registerTypes(iser);
registerTypes(oser);
#ifndef VCMI_ENDIAN_BIG
myEndianess = true;
#else
myEndianess = false;
#endif
connected = true;
std::string pom;
//we got connection
oser & std::string("Aiya!\n") & name & uuid & myEndianess; //identify ourselves
iser & pom & pom & contactUuid & contactEndianess;
logNetwork->info("Established connection with %s. UUID: %s", pom, contactUuid);
mutexRead = std::make_shared<boost::mutex>();
mutexWrite = std::make_shared<boost::mutex>();
iser.fileVersion = SERIALIZATION_VERSION;
}
CConnection::CConnection(const std::string & host, ui16 port, std::string Name, std::string UUID):
io_service(std::make_shared<asio::io_service>()),
iser(this),
oser(this),
name(std::move(Name)),
uuid(std::move(UUID))
{
int i = 0;
boost::system::error_code error = asio::error::host_not_found;
socket = std::make_shared<tcp::socket>(*io_service);
tcp::resolver resolver(*io_service);
tcp::resolver::iterator end;
tcp::resolver::iterator pom;
tcp::resolver::iterator endpoint_iterator = resolver.resolve(tcp::resolver::query(host, std::to_string(port)), error);
if(error)
{
logNetwork->error("Problem with resolving: \n%s", error.message());
throw std::runtime_error("Can't establish connection: Problem with resolving");
}
pom = endpoint_iterator;
if(pom != end)
logNetwork->info("Found endpoints:");
else
{
logNetwork->error("Critical problem: No endpoints found!");
throw std::runtime_error("Can't establish connection: No endpoints found!");
}
while(pom != end)
{
logNetwork->info("\t%d:%s", i, (boost::asio::ip::tcp::endpoint&)*pom);
pom++;
}
i=0;
while(endpoint_iterator != end)
{
logNetwork->info("Trying connection to %s(%d)", (boost::asio::ip::tcp::endpoint&)*endpoint_iterator, i++);
socket->connect(*endpoint_iterator, error);
if(!error)
{
init();
return;
}
else
{
throw std::runtime_error("Can't establish connection: Failed to connect!");
}
endpoint_iterator++;
}
}
CConnection::CConnection(std::shared_ptr<TSocket> Socket, std::string Name, std::string UUID):
iser(this),
oser(this),
socket(std::move(Socket)),
name(std::move(Name)),
uuid(std::move(UUID))
{
init();
}
CConnection::CConnection(const std::shared_ptr<TAcceptor> & acceptor,
const std::shared_ptr<boost::asio::io_service> & io_service,
std::string Name,
std::string UUID):
io_service(io_service),
iser(this),
oser(this),
name(std::move(Name)),
uuid(std::move(UUID))
{
boost::system::error_code error = asio::error::host_not_found;
socket = std::make_shared<tcp::socket>(*io_service);
acceptor->accept(*socket,error);
if (error)
{
logNetwork->error("Error on accepting: %s", error.message());
socket.reset();
throw std::runtime_error("Can't establish connection :(");
}
init();
}
void CConnection::flushBuffers()
{
if(!enableBufferedWrite)
return;
try
{
asio::write(*socket, connectionBuffers->writeBuffer);
}
catch(...)
{
//connection has been lost
connected = false;
throw;
}
enableBufferedWrite = false;
}
int CConnection::write(const void * data, unsigned size)
{
try
{
if(enableBufferedWrite)
{
std::ostream ostream(&connectionBuffers->writeBuffer);
ostream.write(static_cast<const char *>(data), size);
return size;
}
int ret = static_cast<int>(asio::write(*socket, asio::const_buffers_1(asio::const_buffer(data, size))));
return ret;
}
catch(...)
{
//connection has been lost
connected = false;
throw;
}
}
int CConnection::read(void * data, unsigned size)
{
try
{
if(enableBufferedRead)
{
auto available = connectionBuffers->readBuffer.size();
while(available < size)
{
auto bytesRead = socket->read_some(connectionBuffers->readBuffer.prepare(1024));
connectionBuffers->readBuffer.commit(bytesRead);
available = connectionBuffers->readBuffer.size();
}
std::istream istream(&connectionBuffers->readBuffer);
istream.read(static_cast<char *>(data), size);
return size;
}
int ret = static_cast<int>(asio::read(*socket,asio::mutable_buffers_1(asio::mutable_buffer(data,size))));
return ret;
}
catch(...)
{
//connection has been lost
connected = false;
throw;
}
}
CConnection::~CConnection()
{
if(handler)
handler->join();
close();
}
template<class T>
CConnection & CConnection::operator&(const T &t) {
// throw std::exception();
//XXX this is temporaly ? solution to fix gcc (4.3.3, other?) compilation
// problem for more details contact t0@czlug.icis.pcz.pl or impono@gmail.com
// do not remove this exception it shoudnt be called
return *this;
}
void CConnection::close()
{
if(socket)
{
socket->close();
socket.reset();
}
}
bool CConnection::isOpen() const
{
return socket && connected;
}
void CConnection::reportState(vstd::CLoggerBase * out)
{
out->debug("CConnection");
if(socket && socket->is_open())
{
out->debug("\tWe have an open and valid socket");
out->debug("\t %d bytes awaiting", socket->available());
}
}
CPack * CConnection::retrievePack()
{
enableBufferedRead = true;
CPack * pack = nullptr;
boost::unique_lock<boost::mutex> lock(*mutexRead);
iser & pack;
logNetwork->trace("Received CPack of type %s", (pack ? typeid(*pack).name() : "nullptr"));
if(pack == nullptr)
{
logNetwork->error("Received a nullptr CPack! You should check whether client and server ABI matches.");
}
else
{
pack->c = this->shared_from_this();
}
enableBufferedRead = false;
return pack;
}
void CConnection::sendPack(const CPack * pack)
{
boost::unique_lock<boost::mutex> lock(*mutexWrite);
logNetwork->trace("Sending a pack of type %s", typeid(*pack).name());
enableBufferedWrite = true;
oser & pack;
flushBuffers();
}
void CConnection::disableStackSendingByID()
{
CSerializer::sendStackInstanceByIds = false;
}
void CConnection::enableStackSendingByID()
{
CSerializer::sendStackInstanceByIds = true;
}
void CConnection::disableSmartPointerSerialization()
{
iser.smartPointerSerialization = oser.smartPointerSerialization = false;
}
void CConnection::enableSmartPointerSerialization()
{
iser.smartPointerSerialization = oser.smartPointerSerialization = true;
}
void CConnection::enterLobbyConnectionMode()
{
iser.loadedPointers.clear();
oser.savedPointers.clear();
disableSmartVectorMemberSerialization();
disableSmartPointerSerialization();
}
void CConnection::enterGameplayConnectionMode(CGameState * gs)
{
enableStackSendingByID();
disableSmartPointerSerialization();
addStdVecItems(gs);
}
void CConnection::disableSmartVectorMemberSerialization()
{
CSerializer::smartVectorMembersSerialization = false;
}
void CConnection::enableSmartVectorMemberSerializatoin()
{
CSerializer::smartVectorMembersSerialization = true;
}
std::string CConnection::toString() const
{
boost::format fmt("Connection with %s (ID: %d UUID: %s)");
fmt % name % connectionID % uuid;
return fmt.str();
}
VCMI_LIB_NAMESPACE_END