Client on device connect to Server on pc by socket

[Ludos]

Hi,

I'm a newbie in qt

I use nokia qt sdk, installed trk on the device and I have all the sdk up to date.

I have a problem, I 'm trying to send a simple hello world from a nokia 5800 XpressMusic to a simple application on the pc via QTcpSocket. When I try the to send the "hello world" by the simulator, it works fine, BUT when I deploy the application to the device I notice the QAbstractSocket::ConnectedState stay in the stateconnecting. I don't understand why? so follow the code I wrote:

Client

main.cpp:

#include <QtGui/QApplication>
#include "mainwindow.h"
#include "client.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Client c;
    //c.sendXML();
    MainWindow w;
#if defined(Q_WS_S60)
    w.showMaximized();
#else
    w.show();
#endif

    return a.exec();
}

mainwindow.h:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private:
    Ui::MainWindow *ui;
};

#endif // MAINWINDOW_H

mainwindow.cpp:

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

client.h:

#ifndef CLIENT_H
#define CLIENT_H

#include <QObject>
#include <QtNetwork>
#include <QTcpSocket>
#include <QHostAddress>

class Client : public QObject
{
    Q_OBJECT
public:
    explicit Client(QObject *parent = 0);

signals:

public slots:

private slots:
    void sendXML();

private:
    QTcpSocket* socket;
};

#endif // CLIENT_H

client.cpp

#include "client.h"

Client::Client(QObject *parent) :
        QObject(parent)
{

   //set up connection
    socket = new QTcpSocket(this); 

    socket->connectToHost(QHostAddress::QHostAddress("192.168.0.191"), 44444, QIODevice::WriteOnly );
    connect(socket, SIGNAL(connected()), this, SLOT(sendXML()));

    if(socket->isOpen())
        qDebug() << "is open";

}

void Client::sendXML(){
    QByteArray block = "hello World";

    block.append("!!!!");

    qDebug() << socket->state();

    if(socket->state() != QAbstractSocket::ConnectedState){
        qDebug() << "error:" << socket->errorString();
        return;
    }
    if(socket->isValid()){
        socket->write(block, block.length());
        qDebug() << "sent!!!!";
    }
}

Server

main.cpp

#include <QtGui/QApplication>
#include "mainwindow.h"
#include "server.h"
#include <QSqlDatabase>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);



    qDebug()  << QSqlDatabase::drivers();

    Server *s = new Server();
    MainWindow w;

    w.setServer(s);
    s->setMW(&w);

    w.show();

    return a.exec();
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include "server.h"

namespace Ui {
    class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
    void setServer(Server *s);
    void setTextLabel(QString str);

private:
    Ui::MainWindow *ui;
    Server *s;
};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    //s.setLabel(this->ui->label);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::setServer(Server *s)
{
    this->s = s;
}

void MainWindow::setTextLabel(QString str){
    this->ui->label->setText(str);
}

server.h

#ifndef SERVER_H
#define SERVER_H

#include <QObject>
#include <QTcpServer>
#include <QTcpSocket>
#include <QLabel>


class MainWindow;

class Server : public QObject
{
    Q_OBJECT
public:
    explicit Server(QObject *parent = 0);
    void setMW(MainWindow *mw);
signals:

public slots:

private slots:
    void on_newConnection();
    void on_ReadyRead();

private:
    QTcpServer *server;
    QTcpSocket * s;    
    MainWindow * mw;

};

#endif // SERVER_H

server.cpp

#include "server.h"
#include "mainwindow.h"

Server::Server(QObject *parent) :
    QObject(parent)
{
    // set up connection
    server = new QTcpServer(this);

    // if server does not listen

    if(! server->listen(QHostAddress::Any, 44444)){
        server->close();
        return;
    }

    // new connection coming in
    connect(server,SIGNAL(newConnection()),this, SLOT(on_newConnection()));
}

void Server::on_newConnection()
{
    s = server->nextPendingConnection();
    connect( s, SIGNAL(readyRead()), SLOT(on_ReadyRead()) );
}
void Server::on_ReadyRead(){

    QByteArray xml = s->readAll();
    QString sXml(xml);
    qDebug() << "xml \n" << sXml;
    mw->setTextLabel(sXml);

}

void Server::setMW(MainWindow *mw){
    this->mw = mw;
}

thanks for helping!

[Ludos]

Nobody know why is not working ?

Ok i will ask by other way... How can I send data or connect to a remote sqlite by gprs or 3g?

Thanks for helping!

[divanov]

Do you have NetworkServices capabilities?

[Ludos]

Yes I think!

following is my pro file

#-------------------------------------------------
#
# Project created by QtCreator 2010-09-01T09:27:16
#
#-------------------------------------------------

QT       += core gui
QT           += sql
QT      += xml
QT      += network

TARGET = Servico+
TEMPLATE = app


SOURCES += main.cpp \
    blueprint.cpp \
    config.cpp \
    databasemanager.cpp \
    entity.cpp \
    room.cpp \
    unit.cpp \
    wall.cpp \
    frameblueprint.cpp \
    framecamera.cpp \
    framechooseclient.cpp \
    framelogin.cpp \
    framemeasure.cpp \
    frameorganize.cpp \
    frameroom.cpp \
    servicomais.cpp \
    databasemysql.cpp \
    customdoor.cpp \
    customgv.cpp

HEADERS  += \
    blueprint.h \
    config.h \
    databasemanager.h \
    entity.h \
    room.h \
    unit.h \
    wall.h \
    frameblueprint.h \
    framecamera.h \
    framechooseclient.h \
    framelogin.h \
    framemeasure.h \
    frameorganize.h \
    frameroom.h \
    servicomais.h \
    databasemysql.h \
    customdoor.h \
    customgv.h

FORMS    += \
    frameblueprint.ui \
    framecamera.ui \
    framechooseclient.ui \
    framelogin.ui \
    framemeasure.ui \
    frameorganize.ui \
    frameroom.ui \
    servicomais.ui

CONFIG += mobility
MOBILITY += multimedia bearer #sensors

symbian {
    TARGET.UID3 = 0xec245946
    TARGET.CAPABILITY += UserEnvironment NetworkServices #ReadDeviceData
    TARGET.EPOCSTACKSIZE = 0x14000
    TARGET.EPOCHEAPSIZE = 0x020000 0x800000
}

RESOURCES += \
    Resources.qrc