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