khanat-opennel-code/code/nel/samples/net/net_layer5/ping_service.cpp

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// NeL - MMORPG Framework <http://dev.ryzom.com/projects/nel/>
// 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/>.
/*
* Layer 5 and Service example, ping server.
*
* This ping service expects pings, sends pongs back.
*
* To run this program, ensure there is a file "ping_service.cfg"
* containing the location of the naming service (NSHost, NSPort)
* in the working directory. The naming service must be running.
*/
// We're using the NeL Service framework, and layer 5
#include "nel/net/service.h"
#include "nel/misc/displayer.h"
using namespace NLNET;
using namespace NLMISC;
CFileDisplayer fd("ps.log");
/*
* Callback function called when receiving a "PING" message
*
* Arguments:
* - msgin: the incoming message (coming from a client)
* - from: the "sockid" of the sender client
* - server: the CCallbackNetBase object (which really is a CCallbackServer object, for a server)
*
* Input (expected message from a client): PING
* - uint32: ping counter
*
* Output (sent message to the ping server): PONG
* - uint32: ping counter
*/
void cbPing(CMessage &msgin, const std::string &serviceName, TServiceId sid)
{
uint32 counter;
// Input
msgin.serial( counter );
// Output (uses layer 4 but this is not really necessary, see server.cpp in layer 3 example)
CMessage msgout("PONG");
msgout.serial( counter );
CUnifiedNetwork::getInstance()->send(sid, msgout);
nlinfo( "PING -> PONG %u", counter );
}
//
void cbUpService(const std::string &serviceName, TServiceId sid, void *arg)
{
nlinfo("Service %s %d is up", serviceName.c_str(), sid.get());
// Output (uses layer 4 but this is not really necessary, see server.cpp in layer 3 example)
CMessage msgout("PONG");
uint32 counter = 0xFFFFFFFF;
msgout.serial( counter );
CUnifiedNetwork::getInstance()->send(sid, msgout);
}
void cbDownService(const std::string &serviceName, TServiceId sid, void *arg)
{
nlinfo("Service %s %d is down", serviceName.c_str(), sid.get());
}
/*
* Callback array for messages received from a client
*/
TUnifiedCallbackItem CallbackArray[] =
{
{ "PING", cbPing }
};
//
class CPingService : public IService
{
public:
/*
* Initialization
*/
void init()
{
DebugLog->addDisplayer (&fd);
InfoLog->addDisplayer (&fd);
WarningLog->addDisplayer (&fd);
ErrorLog->addDisplayer (&fd);
// Connect to the ping service
CUnifiedNetwork *instance = CUnifiedNetwork::getInstance();
instance->setServiceUpCallback("*", cbUpService, NULL);
instance->setServiceDownCallback("*", cbDownService, NULL);
}
};
/*
* Declare a service with the class IService, the names "PS" (short) and "ping_service" (long).
* The port is automatically allocated (0) and the main callback array is CallbackArray.
*/
NLNET_SERVICE_MAIN( CPingService, "PS", "ping_service", 0, CallbackArray, "", "" )