khanat-opennel-code/code/ryzom/client/src/gateway_fec_transport.cpp

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// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010 Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "stdpch.h"
#include "nel/net/module.h"
#include "nel/net/module_manager.h"
#include "nel/net/module_gateway.h"
// client include
#if !defined(RZ_CLIENT_DRONE)
# include "net_manager.h"
# include "network_connection.h"
#else
# include "../client_drone/network_connection.h"
# include "../client_drone/simulated_client.h"
# include "../game_share/generic_xml_msg_mngr.h"
#endif
using namespace std;
using namespace NLMISC;
using namespace NLNET;
extern CGenericXmlMsgHeaderManager GenericMsgHeaderMngr;
/** the specialized route for frontend client transport */
class CFEClientRoute : public CGatewayRoute
{
public:
// the network connection to use to send data
CNetworkConnection *NetConn;
CFEClientRoute(IGatewayTransport *transport, CNetworkConnection *netConn)
: CGatewayRoute(transport),
NetConn(netConn)
{
// warn the server that the transport is open
CBitMemStream bms;
GenericMsgHeaderMngr.pushNameToStream( "MODULE_GATEWAY:FEOPEN", bms );
sendRawMessage(bms);
}
~CFEClientRoute()
{
// warn the server that the transport is closed
CBitMemStream bms;
GenericMsgHeaderMngr.pushNameToStream( "MODULE_GATEWAY:FECLOSE", bms );
sendRawMessage(bms);
}
void sendMessage(const CMessage &message) const
{
// wrap the message in a transport message
CBitMemStream wrapper;
GenericMsgHeaderMngr.pushNameToStream( "MODULE_GATEWAY:GATEWAY_MSG", wrapper );
// wrapper.serial(message.getName());
// wrapper.serialBufferWithSize(const_cast<uint8*>(message.buffer())+message.getHeaderSize(), message.length()-message.getHeaderSize());
wrapper.serialBufferWithSize(const_cast<uint8*>(message.buffer()), message.length());
sendRawMessage(wrapper);
}
// send a bit mem stream to the server
void sendRawMessage(CBitMemStream &message) const
{
NetConn->push(message);
}
};
#define FE_CLIENT_CLASS_NAME "FEClient"
/** Transport for module gateway through front end service, client part. */
class CGatewayFEClientTransport : public IGatewayTransport
{
friend class CFEClientRoute;
public:
/// Invalid command
class EInvalidCommand : public NLMISC::Exception
{
};
/// The established route if any
CFEClientRoute *_Route;
/// Status of the transport.
bool _Open;
/// A flag that is false after opening the transport until we receive one message
bool _FirstMessageReceived;
enum TMessageType
{
mt_route_open,
mt_route_close,
mt_gw_msg,
};
/// Storage for message pending because or bad ordering
struct TWaitingMessage
{
TMessageType MessageType;
CBitMemStream Message;
};
typedef map<uint8, TWaitingMessage> TWaitingMessages;
/// The list of message waiting because or bad ordering
TWaitingMessages _WaitingMessages;
/// The message serial number that we are waiting to dispatch
uint8 _NextAwaitedMessage;
#if !defined(RZ_CLIENT_DRONE)
// store the unique active transport (only one transport of this type can be activated at a time)
static CGatewayFEClientTransport *&OpenTransport()
{
static CGatewayFEClientTransport *openTransport = NULL;
return openTransport;
}
#else
CSimulatedClient *SimClient;
#endif
/// Constructor
CGatewayFEClientTransport(const IGatewayTransport::TCtorParam &param)
: IGatewayTransport(param),
_Route(NULL),
_Open(false),
_FirstMessageReceived(false),
_NextAwaitedMessage(0)
{
#if defined(RZ_CLIENT_DRONE)
SimClient = CSimulatedClient::currentContext();
#endif
}
~CGatewayFEClientTransport()
{
#if !defined(RZ_CLIENT_DRONE)
if (OpenTransport() == this)
{
// the transport is still open, close it before destruction
close();
}
#else
// close anyway
close();
#endif
}
const std::string &getClassName() const
{
static string className(FE_CLIENT_CLASS_NAME);
return className;
}
virtual void update()
{
}
virtual uint32 getRouteCount() const
{
return _Route != NULL ? 1 : 0;
}
void dump(NLMISC::CLog &log) const
{
IModuleManager &mm = IModuleManager::getInstance();
log.displayNL(" Frontend service transport, client part");
if (!_Open)
{
log.displayNL(" The connection is currently closed.");
}
else
{
log.displayNL(" The connection is open :");
if (_Route == NULL)
{
log.displayNL(" There is no route.");
}
else
{
CFEClientRoute *route = _Route;
log.displayNL(" The route has %u entries in the proxy translation table :",
route->ForeignToLocalIdx.getAToBMap().size());
{
CGatewayRoute::TForeignToLocalIdx::TAToBMap::const_iterator first(route->ForeignToLocalIdx.getAToBMap().begin()), last(route->ForeignToLocalIdx.getAToBMap().end());
for (; first != last; ++first)
{
IModuleProxy *modProx = mm.getModuleProxy(first->second);
log.displayNL(" - Proxy '%s' : local proxy id %u => foreign module id %u",
modProx != NULL ? modProx->getModuleName().c_str() : "ERROR, invalid module",
first->second,
first->first);
}
}
}
}
}
void onCommand(const CMessage &/* command */) throw (IGatewayTransport::EInvalidCommand)
{
// nothing done for now
throw EInvalidCommand();
}
/// The gateway send a textual command to the transport
bool onCommand(const TParsedCommandLine &command) throw (IGatewayTransport::EInvalidCommand)
{
if (command.SubParams.size() < 1)
throw EInvalidCommand();
const std::string &commandName = command.SubParams[0]->ParamName;
if (commandName == "open")
{
if (_Open)
{
nlwarning("The transport is already open");
return false;
}
#if !defined(RZ_CLIENT_DRONE)
if (OpenTransport() != NULL)
{
nlwarning("A transport is already open, only one transport can be open at a time");
return false;
}
#endif
open();
}
else if (commandName == "close")
{
close();
}
else
return false;
return true;
}
/// Open the connection by intercepting client gateway message
void open() throw (ETransportError)
{
if (_Open)
{
nlwarning("Transport already open");
return;
}
#if !defined(RZ_CLIENT_DRONE)
if (OpenTransport() != NULL)
throw ETransportError("connect : a transport is already connected !");
// set this transport as the open transport
OpenTransport() = this;
#else
// associate this transport with the simulated client for later dispatching
SimClient->setGatewayTransport(this);
#endif
_Open = true;
_FirstMessageReceived = false;
// create a route
onConnection();
}
/// Close the server, this will close the listing socket and any active connection
void close()
{
if (!_Open)
{
nlwarning("Transport not open");
return;
}
#if !defined(RZ_CLIENT_DRONE)
if (OpenTransport() != this)
throw ETransportError("close : The connection is not open");
#else
// associate this transport with the simulated client for later dispatching
SimClient->setGatewayTransport(NULL);
#endif
if( _Route != NULL)
onDisconnection();
_Open = false;
_FirstMessageReceived = false;
#if !defined(RZ_CLIENT_DRONE)
// this transport is no longer open
OpenTransport() = NULL;
#endif
}
/***************************************************/
/** Event management **/
/***************************************************/
// handle the connection of the client
void onConnection ( )
{
if (_Route != NULL)
{
nlwarning("onConnection : route already created !");
return;
}
CNetworkConnection *netConn;
#if defined(RZ_CLIENT_DRONE)
netConn = &SimClient->getNetworkConnection();
#else
netConn = &NetMngr;
#endif
// Create a new route for this connection
_Route = new CFEClientRoute(this, netConn);
// callback the gateway
_Gateway->onRouteAdded(_Route);
}
// handle the deconnection of a new client on the client
void onDisconnection ()
{
if (_Route == NULL)
{
nlwarning("onDisconnection : route not created !");
return;
}
// callback the gateway that this route is no more
_Gateway->onRouteRemoved(_Route);
// delete the route
delete _Route;
_Route = NULL;
}
// Called to dispatch an incoming message to the gateway
void onDispatchMessage(NLMISC::CBitMemStream &bms)
{
if (_Route == NULL)
{
nlwarning("onDispatchMessage : no route created, message will be discarded");
return;
}
// now, we have received a message
_FirstMessageReceived = true;
// Build a CMessage from the bit mem stream
// string msgName;
// bms.serial(msgName);
// create an input stream for dispatching
CMessage msg("", true);
uint32 len;
bms.serial(len);
bms.serialBuffer(msg.bufferToFill(len), len);
msg.readType();
// forward to gateway
_Gateway->onReceiveMessage(_Route, msg);
}
// a message has been processed, try to process waiting message
void processPendingMessage()
{
if (_WaitingMessages.empty())
return;
TWaitingMessages::iterator it(_WaitingMessages.find(_NextAwaitedMessage));
while (it != _WaitingMessages.end())
{
TWaitingMessage &wm = _WaitingMessages.find(_NextAwaitedMessage)->second;
switch (wm.MessageType)
{
case mt_route_open:
impulsionGatewayOpen(wm.Message, false);
break;
case mt_route_close:
impulsionGatewayClose(wm.Message, false);
break;
case mt_gw_msg:
impulsionGatewayMessage(wm.Message, false);
break;
}
// remove the processed message
_WaitingMessages.erase(it);
// advance to next message, _NextAwaitedMessage is incremented by impulsion handler
it = _WaitingMessages.find(_NextAwaitedMessage);
}
}
// impulsion gateway open callback handler
void impulsionGatewayOpen(NLMISC::CBitMemStream &bms, bool readSerialNumber)
{
uint8 serialNumber;
if (readSerialNumber)
bms.serial(serialNumber);
else
serialNumber = _NextAwaitedMessage;
if (serialNumber != _NextAwaitedMessage)
{
// store the message for later processing
nlassert(_WaitingMessages.find(serialNumber) == _WaitingMessages.end());
_WaitingMessages[serialNumber].Message.swap(bms);
// _WaitingMessages[serialNumber].Message = bms;
_WaitingMessages[serialNumber].MessageType = mt_route_open;
return;
}
// advance to next message for next reception
++_NextAwaitedMessage;
if (_Route != NULL && _FirstMessageReceived)
{
// there is already a route here, and it have received some message,
// we need to delete it
onDisconnection();
}
if (_Route == NULL)
// if there is no route, create one
onConnection();
// try to process some messages
if (readSerialNumber)
processPendingMessage();
}
// impulsion gateway message callback handler
void impulsionGatewayMessage(NLMISC::CBitMemStream &bms, bool readSerialNumber)
{
uint8 serialNumber;
if (readSerialNumber)
bms.serial(serialNumber);
else
serialNumber = _NextAwaitedMessage;
if (serialNumber != _NextAwaitedMessage)
{
// store the message for later processing
nlassert(_WaitingMessages.find(serialNumber) == _WaitingMessages.end());
_WaitingMessages[serialNumber].Message.swap(bms);
// _WaitingMessages[serialNumber].Message = bms;
_WaitingMessages[serialNumber].MessageType = mt_gw_msg;
return;
}
// advance to next message for next reception
++_NextAwaitedMessage;
onDispatchMessage(bms);
if (readSerialNumber)
processPendingMessage();
}
// impulsion gateway open callback handler
void impulsionGatewayClose(NLMISC::CBitMemStream &bms, bool readSerialNumber)
{
uint8 serialNumber;
if (readSerialNumber)
bms.serial(serialNumber);
else
serialNumber = _NextAwaitedMessage;
if (serialNumber != _NextAwaitedMessage)
{
// store the message for later processing
nlassert(_WaitingMessages.find(serialNumber) == _WaitingMessages.end());
_WaitingMessages[serialNumber].Message.swap(bms);
// _WaitingMessages[serialNumber].Message = bms;
_WaitingMessages[serialNumber].MessageType = mt_route_close;
return;
}
// advance to next message for next reception
++_NextAwaitedMessage;
if (_Route == NULL)
{
// there is no route open
return;
}
onDisconnection();
if (readSerialNumber)
processPendingMessage();
}
/***************************************************/
static CGatewayFEClientTransport *getCurrentTransport()
{
#if defined(RZ_CLIENT_DRONE)
// the current transport is set to the current context of the client drone
if (CSimulatedClient::currentContext() == NULL)
return NULL;
if (CSimulatedClient::currentContext()->getGatewayTransport() == NULL)
return NULL;
return static_cast<CGatewayFEClientTransport*>(CSimulatedClient::currentContext()->getGatewayTransport());
#else
// normal client mode, there is only one transport
return OpenTransport();
#endif
}
};
void cbImpulsionGatewayOpen(NLMISC::CBitMemStream &bms)
{
if (CGatewayFEClientTransport::getCurrentTransport() != NULL)
CGatewayFEClientTransport::getCurrentTransport()->impulsionGatewayOpen(bms, true);
}
// impulsion gateway message callback handler
void cbImpulsionGatewayMessage(NLMISC::CBitMemStream &bms)
{
if (CGatewayFEClientTransport::getCurrentTransport() != NULL)
CGatewayFEClientTransport::getCurrentTransport()->impulsionGatewayMessage(bms, true);
}
// impulsion gateway close callback handler
void cbImpulsionGatewayClose(NLMISC::CBitMemStream &bms)
{
if (CGatewayFEClientTransport::getCurrentTransport() != NULL)
CGatewayFEClientTransport::getCurrentTransport()->impulsionGatewayClose(bms, true);
}
// register this class in the transport factory
NLMISC_REGISTER_OBJECT(IGatewayTransport, CGatewayFEClientTransport, std::string, string(FE_CLIENT_CLASS_NAME));