tftp with QUdpSocket - cannot do - have to use Q3SocketDevice

[wysota]

Use QUdpSocket::bind() to bind your socket to a specified port.

[yvan40]

perfect!
When I tried bind() I still had the conenctToHost(), my bad!

Problem solved, thank's a lot!

the correct source code, if it can help someone else:

basicTester::basicTester(QObject *parent) :
    QObject(parent)
{
    dAddr = QHostAddress("192.168.111.84"); //tftp server address
    dPort = 69;
    sock = new QUdpSocket(this);
    connect(sock, SIGNAL(readyRead()), this, SLOT(readData()));
    sock->bind(2152); /// \TODO need generate random client TID, and check if port available (select another if not) ; see RFC1350
}
 
void basicTester::send() {
    QByteArray dgram;
    QString remote("myfile.txt");
    QString modestring ("octet");
    dgram.resize(( 2 + remote.length() + 1 + modestring.length() + 1 ));
 
    //TFTP WRQ
    dgram[0] = 0x00;
    dgram[1] = 0x02;
    memcpy( dgram.data()+2, remote.toAscii(), remote.length() +1 );
    memcpy( dgram.data()+2+remote.length()+1, modestring.toAscii(), modestring.length() +1 );
 
    qDebug() << "Writing dgram to " << dAddr << ":" << dPort;
    if(sock->writeDatagram(dgram, dAddr, dPort) == -1){
        qDebug() << "Error sending WRQ packet " << sock->errorString();
    }
    qDebug() << "sock peer : " << sock->peerAddress() << sock->peerPort();
    qDebug() << "sock local: " << sock->localAddress() << sock->localPort();
}
 
void basicTester::readData() {
    qDebug() << "basicTester::readData";
    while(sock->hasPendingDatagrams()){
        QByteArray datagram;
        datagram.resize(sock->pendingDatagramSize());
        QHostAddress sender;
        quint16 senderPort;
        sock->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort);
        qDebug() << "tftp server response : " << datagram.toHex();
    }
}

basicTester::basicTester(QObject *parent) :
    QObject(parent)
{
    dAddr = QHostAddress("192.168.111.84"); //tftp server address
    dPort = 69;
    sock = new QUdpSocket(this);
    connect(sock, SIGNAL(readyRead()), this, SLOT(readData()));
    sock->bind(2152); /// \TODO need generate random client TID, and check if port available (select another if not) ; see RFC1350
}

void basicTester::send() {
    QByteArray dgram;
    QString remote("myfile.txt");
    QString modestring ("octet");
    dgram.resize(( 2 + remote.length() + 1 + modestring.length() + 1 ));

    //TFTP WRQ
    dgram[0] = 0x00;
    dgram[1] = 0x02;
    memcpy( dgram.data()+2, remote.toAscii(), remote.length() +1 );
    memcpy( dgram.data()+2+remote.length()+1, modestring.toAscii(), modestring.length() +1 );

    qDebug() << "Writing dgram to " << dAddr << ":" << dPort;
    if(sock->writeDatagram(dgram, dAddr, dPort) == -1){
        qDebug() << "Error sending WRQ packet " << sock->errorString();
    }
    qDebug() << "sock peer : " << sock->peerAddress() << sock->peerPort();
    qDebug() << "sock local: " << sock->localAddress() << sock->localPort();
}

void basicTester::readData() {
    qDebug() << "basicTester::readData";
    while(sock->hasPendingDatagrams()){
        QByteArray datagram;
        datagram.resize(sock->pendingDatagramSize());
        QHostAddress sender;
        quint16 senderPort;
        sock->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort);
        qDebug() << "tftp server response : " << datagram.toHex();
    }
}

To copy to clipboard, switch view to plain text mode 

[piper]

perfect!

sock->bind(2152); /// \TODO need generate random client TID, and check if port available (select another if not) ; see RFC1350

sock->bind(2152); /// \TODO need generate random client TID, and check if port available (select another if not) ; see RFC1350

To copy to clipboard, switch view to plain text mode 

No need to worry about available ports if you let bind() handle it for you like this:

sock->bind();

sock->bind();

To copy to clipboard, switch view to plain text mode