khanat-opennel-code/code/nel/samples/net/net_layer3/client.cpp

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2011-04-29 17:15:53 +00:00
// 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 3 example, client.
*
* This client connects to a front-end server at localhost:37000.
* It sends pings and expects pongs (ping replies).
*/
// We're using NeL
#include "nel/misc/types_nl.h"
#include "nel/misc/debug.h"
using namespace NLMISC;
// We're using CInetAddress, CMessage and CCallbackClient (because we're building a client)
#include "nel/net/inet_address.h"
#include "nel/net/message.h"
#include "nel/net/callback_client.h"
using namespace NLNET;
/*
* Callback function called when receiving a "PONG" message
*
* Arguments:
* - msgin: the incoming message
* - from: the "sockid" of the sender (usually useless for a CCallbackClient)
* - client: the CCallbackNetBase object (which really is a CCallbackClient object, for a client)
*
* Input (expected message): PONG
* - uint32: ping counter
*
* Output (sent message): PING
* - uint32: new ping counter
*/
void cbPong( CMessage& msgin, TSockId from, CCallbackNetBase& client )
{
uint32 counter;
// Input
msgin.serial( counter );
nlinfo( "Received PONG number %u", counter );
counter++;
// Output
CMessage msgout ( "PING" );
msgout.serial( counter );
client.send( msgout );
nlinfo( "Sent PING number %u", counter );
}
/*
* Callback array
*/
TCallbackItem CallbackArray[] =
{
{ "PONG", cbPong } // when receiving a "PONG" message, call cbPong()
};
/*
* main
*/
void main( int argc, char **argv )
{
try
{
// Initialize and connect to the front-end server at localhost:37000
CCallbackClient client;
client.addCallbackArray( CallbackArray, sizeof(CallbackArray)/sizeof(CallbackArray[0]) );
client.connect( CInetAddress( "localhost" , 37000 ) );
// Send a PING message
uint32 counter = 0;
CMessage msg( "PING" ); // create the message
msg.serial( counter ); // serialize the counter into the message
client.send( msg ); // put into the send queue
nlinfo( "Sent PING number %u", counter );
// Main loop
while ( client.connected() )
{
// Perform sends and receives, call callbacks
client.update();
}
nlinfo( "Disconnected" );
}
catch ( Exception &e )
{
nlerror( "Error: %s", e.what() );
}
}