QTcpServer Problem

[ionutdanila]

My question is simple, I suppose, but I can't figure out why this is happening.

I have a QTcpServer:

//server initialization
    server= new QTcpServer();
    bool success = server->listen(QHostAddress::Any, 10101);
 
    if(!success)
    {
        ui->textEdit->setTextColor(Qt::red);
        ui->textEdit->append(" > Could not create TopMovie Server! \n   Reason: TopMovie Server is already running! \n\n   This Window will automatically close!");
        ui->textEdit->setTextColor(Qt::black);
        QTimer *timer = new QTimer(this);
        connect(timer, SIGNAL(timeout()), this, SLOT(sterge_server()));
        timer->start(3000);
    }
    else
    {
        ui->textEdit->setTextColor(Qt::white);
        ui->textEdit->append(" > TopMovie Server Online!");
        connect(server, SIGNAL(newConnection()), this, SLOT(incomingConnection()));
        ui->textEdit->setTextColor(Qt::black);
        DataBase();
    }
 
//incomingConnection
void TopMovieS::incomingConnection()
{
    int Socketfd=server->nextPendingConnection()->socketDescriptor();
    QTcpSocket *client = new QTcpSocket(this);
    client->setSocketDescriptor(Socketfd);
    clients.insert(client);
 
    string adresa=" > New client from: "+client->peerAddress().toString().toStdString();
    ui->textEdit->setTextColor(Qt::yellow);
    ui->textEdit->append(adresa.c_str());
    ui->textEdit->setTextColor(Qt::black);
 
    connect(client, SIGNAL(readyRead()), this, SLOT(readyRead()));
    connect(client, SIGNAL(disconnected()), this, SLOT(disconnected()));
}

//server initialization
    server= new QTcpServer();
    bool success = server->listen(QHostAddress::Any, 10101);

    if(!success)
    {
        ui->textEdit->setTextColor(Qt::red);
        ui->textEdit->append(" > Could not create TopMovie Server! \n   Reason: TopMovie Server is already running! \n\n   This Window will automatically close!");
        ui->textEdit->setTextColor(Qt::black);
        QTimer *timer = new QTimer(this);
        connect(timer, SIGNAL(timeout()), this, SLOT(sterge_server()));
        timer->start(3000);
    }
    else
    {
        ui->textEdit->setTextColor(Qt::white);
        ui->textEdit->append(" > TopMovie Server Online!");
        connect(server, SIGNAL(newConnection()), this, SLOT(incomingConnection()));
        ui->textEdit->setTextColor(Qt::black);
        DataBase();
    }

//incomingConnection
void TopMovieS::incomingConnection()
{
    int Socketfd=server->nextPendingConnection()->socketDescriptor();
    QTcpSocket *client = new QTcpSocket(this);
    client->setSocketDescriptor(Socketfd);
    clients.insert(client);

    string adresa=" > New client from: "+client->peerAddress().toString().toStdString();
    ui->textEdit->setTextColor(Qt::yellow);
    ui->textEdit->append(adresa.c_str());
    ui->textEdit->setTextColor(Qt::black);

    connect(client, SIGNAL(readyRead()), this, SLOT(readyRead()));
    connect(client, SIGNAL(disconnected()), this, SLOT(disconnected()));
}

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I read on QTcpServer Documentation that I have to call nextPendingConnection() instead of IncommingConnection(). And also IncommingConnection() needs a QTcpSocket parameter... Anyway, this code on Windows gives a warning every time a new client is connecting: "QSocketNotifier: Multiple socket notifiers for same socket 768 and type Read", but it still works.

On Ubuntu the same code doesn't work. It gives the same error, but doesn't continue: "QSocketNotifier: Invalid socket 24 and type 'Read', disabling..."

Please help me, I am new to Qt and this is my first QTcpServer. I didn't understood everything from documentation, so the code is, I suppose, wrong.

Thank you!

[stillwaiting]

"QSocketNotifier: Multiple socket notifiers for same socket 768 and type Read" warning tells you that there are multiple QTcpSocket instances that use the same socket descriptor.

Instead of doing this:

int Socketfd=server->nextPendingConnection()->socketDescriptor();
QTcpSocket *client = new QTcpSocket(this);
client->setSocketDescriptor(Socketfd);

int Socketfd=server->nextPendingConnection()->socketDescriptor();
QTcpSocket *client = new QTcpSocket(this);
client->setSocketDescriptor(Socketfd);

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try this:

QTcpSocket *client = server->nextPendingConnection();

QTcpSocket *client = server->nextPendingConnection();

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[ionutdanila]

@stillwaiting Thank you very very much! It works now!