khanat-opennel-code/code/nel/samples/net/udp/receive_task.cpp

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2016-01-24 16:08:32 +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/>.
#include "receive_task.h"
#ifdef NL_OS_WINDOWS
# ifndef NL_COMP_MINGW
# define NOMINMAX
# endif
# include <windows.h>
#elif defined NL_OS_UNIX
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <netdb.h>
#define WSAGetLastError() 0
#endif
using namespace NLMISC;
using namespace NLNET;
/*
* TReceivedMessage
*/
/// Constructor
TReceivedMessage::TReceivedMessage()
{
VAddrFrom.resize( sizeof(sockaddr_in) );
}
/// Return a vector containing the address info
void TReceivedMessage::addressToVector()
{
memcpy( &*VAddrFrom.begin(), AddrFrom.sockAddr(), sizeof(sockaddr_in) );
}
/// Set address with address info from specified vector
void TReceivedMessage::vectorToAddress()
{
AddrFrom.setSockAddr( (sockaddr_in*)&*VAddrFrom.begin() );
}
/*
* Constructor
*/
CReceiveTask::CReceiveTask( uint16 port, uint32 msgsize ) :
_DatagramLength( msgsize ),
_ReceivedMessage(),
_WriteQueue( "WriteQueue" ), // value unspecified
_ExitRequired( false )
{
// Socket
DataSock = new CUdpSock( false );
nlassert( DataSock );
DataSock->bind( port );
}
/*
* Destructor
*/
CReceiveTask::~CReceiveTask()
{
nlassert( DataSock != NULL );
delete DataSock;
DataSock = NULL;
}
/*
* Run
*/
void CReceiveTask::run()
{
uint maxrecvlength = _DatagramLength;
while ( ! _ExitRequired )
{
sint64 d;
try
{
// Receive into _ReceivedMessage
_DatagramLength = maxrecvlength;
_ReceivedMessage.resizeData( _DatagramLength );
_ReceivedMessage.setTypeEvent( TReceivedMessage::User );
DataSock->receivedFrom( _ReceivedMessage.userDataW(), _DatagramLength, _ReceivedMessage.AddrFrom );
d = CTime::getLocalTime ();
}
catch (const ESocket&)
{
// Remove the client corresponding to the address
_ReceivedMessage.setTypeEvent( TReceivedMessage::RemoveClient );
_DatagramLength = 0;
}
// Push into the write queue
_ReceivedMessage.addressToVector();
_ReceivedMessage.resizeData( _DatagramLength ); // _DatagramLength was modified by receivedFrom()
_ReceivedMessage.setDate ();
{
CSynchronized<CBufFIFO*>::CAccessor wq( &_WriteQueue );
wq.value()->push( _ReceivedMessage.data() );
wq.value()->push( _ReceivedMessage.VAddrFrom );
}
}
nlinfo( "Exiting from front-end receive task" );
}
/*
* Set new write queue
*/
void CReceiveTask::setWriteQueue( CBufFIFO *writequeue )
{
CSynchronized<CBufFIFO*>::CAccessor wq( &_WriteQueue );
wq.value() = writequeue;
}