khanat-opennel-code/code/nel/samples/net/net_layer4/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 4 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.
*
* DEPRECATED: You should use layer5 (take a look in the layer5 sample directory)
*
*/
// We're using the NeL Service framework, and layer 4
#include "nel/net/service.h"
using namespace NLNET;
/*
* 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, TSockId from, CCallbackNetBase& server )
{
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 );
CNetManager::send( "PS", msgout, from );
nlinfo( "PING -> PONG %u", counter );
}
/*
* Callback array for messages received from a client
*/
TCallbackItem CallbackArray[] =
{
{ "PING", cbPing }
};
// We use IService directly, no need to inherit from it
/*
* 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_OLD_SERVICE_MAIN( IService, "PS", "ping_service", 0, CallbackArray, "", "" )