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   clientConnection = new QTcpSocket(this);   
    tcpServer = new QTcpServer();
    connect(tcpServer, SIGNAL(newConnection()), this, SLOT(newConnect()));


void frmMain::newConnect()
{
    clientConnection = tcpServer->nextPendingConnection();    
    
    connect(clientConnection, SIGNAL(readyRead()),
            this, SLOT(receivePkg()));   
            
    connect(clientConnection, SIGNAL(disconnected()),
            clientConnection, SLOT(deleteLater()));            
            
}


void frmMain::receivePkg()
{
    read_size = clientConnection->read(buf_c, READ_BUF_SIZE);