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  1. 19th January 2011, 14:44 #1
    javed_alam786
    javed_alam786 is offline Novice
    Join Date
    Jan 2011
    Posts
    32
    Qt products
    Qt4
    Platforms
    Windows

    Default TCP IP Client : Host Not found : Permission Denied

    Hi All,

    I am new to QT and Symbian, and to be honest i have spent a week trying to figure out what is wrong here in my TCP IP Client that runs on Nokia E52, with no luck.

    Every time i try to connect to Server using domain name i get error : "Host Not Found"
    Every time is use IP addess is get "Permission Denied"

    I have tested the Server using SIC Ftp for Symbian and Ftp for Android they all can connect to server using same domain name and the port no, therefore i am sure i have something wrong in my client code. Any help would be greatly appreciated.

    Code:-

    qmake Code: 
    1. //TCP_Client.pro
    2. //---------
    3. QT += core gui
    4. QT += network
    5.  
    6.  
    7. TARGET = TCP_Client
    8.  
    9. TEMPLATE = app
    10.  
    11.  
    12. SOURCES += main.cpp\
    13.         tcp_client.cpp
    14.  
    15. HEADERS  += tcp_client.h
    16.  
    17. FORMS    += tcp_client.ui
    18.  
    19. CONFIG += mobility
    20. MOBILITY = bearer
    21.  
    22. symbian {
    23.     TARGET.UID3 = 0xe184b214
    24.     TARGET.CAPABILITY += "NetworkServies ReadUserData WriteUserData"
    25.     TARGET.EPOCSTACKSIZE = 0x14000
    26.     TARGET.EPOCHEAPSIZE = 0x020000 0x800000
    27. }
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    Qt Code: 
    1. //tcp_client.h
    2. //-------
    3. #ifndef TCP_CLIENT_H
    4. #define TCP_CLIENT_H
    5.  
    6. #include <QMainWindow>
    7. #include <QTcpSocket>
    8. #include <QtNetwork>
    9.  
    10. namespace Ui {
    11.     class TCP_Client;
    12. }
    13.  
    14. class TCP_Client : public QMainWindow
    15. {
    16.     Q_OBJECT
    17.  
    18. public:
    19.     explicit TCP_Client(QWidget *parent = 0);
    20.     ~TCP_Client();
    21.  
    22. private:
    23.     Ui::TCP_Client *ui;
    24.     QTcpSocket *tcpSocket;
    25.     quint16 blockSize;
    26.  
    27. private slots:
    28.     void requestNewFortune();
    29.     void readFortune();
    30.     void displayError(QAbstractSocket::SocketError socketError);
    31. };
    32.  
    33. #endif // TCP_CLIENT_H
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    Qt Code: 
    1. //tcp_client.cpp
    2. //---------
    3. #include "tcp_client.h"
    4. #include "ui_tcp_client.h"
    5.  
    6. #include<QtGui>
    7. #include<QtNetwork>
    8.  
    9. TCP_Client::TCP_Client(QWidget *parent) : QMainWindow(parent), ui(new Ui::TCP_Client)
    10. {
    11.     ui->setupUi(this);
    12.  
    13.     tcpSocket = new QTcpSocket(this);
    14.     connect(ui->pushButton, SIGNAL(clicked()), this, SLOT(requestNewFortune()));
    15.     connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(displayError(QAbstractSocket::SocketError)));
    16. }
    17.  
    18. TCP_Client::~TCP_Client()
    19. {
    20.     delete ui;
    21. }
    22.  
    23. void TCP_Client::requestNewFortune()
    24. {
    25.     ui->textEdit->clear();
    26.     ui->textEdit->append("Connecting to " + ui->lineEdit_1->text() + " Port No. " + ui->lineEdit_2->text());
    27.  
    28.     tcpSocket->connectToHost(ui->lineEdit_1->text(), ui->lineEdit_2->text().toInt());
    29.     if (tcpSocket->waitForConnected(-1))
    30.          ui->textEdit->append("Connected!");
    31. }
    32.  
    33.  
    34. void TCP_Client::displayError(QAbstractSocket::SocketError socketError)
    35. {
    36.     switch (socketError)
    37.     {
    38.         case QAbstractSocket::RemoteHostClosedError:
    39.             ui->textEdit->append("The remote host closed the connection.");
    40.             break;
    41.         case QAbstractSocket::HostNotFoundError:
    42.              ui->textEdit->append("The host was not found.");
    43.              break;
    44.         case QAbstractSocket::ConnectionRefusedError:
    45.             ui->textEdit->append("The connection was refused by the peer.");
    46.              break;
    47.          default:
    48.              ui->textEdit->append( tr("TCP_Client, the following error occured: %1").arg(tcpSocket->errorString()));
    49.              break;
    50.     }
    51. }
    52.  
    53. void TCP_Client::readFortune()
    54. {
    55.  
    56. }
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    Qt Code: 
    1. //main.cpp
    2. //--------
    3. #include <QtGui/QApplication>
    4. #include "tcp_client.h"
    5.  
    6. int main(int argc, char *argv[])
    7. {
    8.     QApplication a(argc, argv);
    9.     TCP_Client w;
    10. #if defined(Q_WS_S60)
    11.     w.showMaximized();
    12. #else
    13.     w.show();
    14. #endif
    15.  
    16.     return a.exec();
    17. }
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    //tcp_client.ui
    xml Code: 
    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <ui version="4.0">
    3.  <class>TCP_Client</class>
    4.  <widget class="QMainWindow" name="TCP_Client">
    5.   <property name="geometry">
    6.    <rect>
    7.     <x>0</x>
    8.     <y>0</y>
    9.     <width>230</width>
    10.     <height>239</height>
    11.    </rect>
    12.   </property>
    13.   <property name="windowTitle">
    14.    <string>TCP_Client</string>
    15.   </property>
    16.   <widget class="QWidget" name="centralWidget">
    17.    <widget class="QPushButton" name="pushButton">
    18.     <property name="geometry">
    19.      <rect>
    20.       <x>10</x>
    21.       <y>54</y>
    22.       <width>211</width>
    23.       <height>23</height>
    24.      </rect>
    25.     </property>
    26.     <property name="text">
    27.      <string>Connect and Send Message</string>
    28.     </property>
    29.    </widget>
    30.    <widget class="QTextEdit" name="textEdit">
    31.     <property name="geometry">
    32.      <rect>
    33.       <x>10</x>
    34.       <y>80</y>
    35.       <width>211</width>
    36.       <height>151</height>
    37.      </rect>
    38.     </property>
    39.    </widget>
    40.    <widget class="QLineEdit" name="lineEdit_1">
    41.     <property name="geometry">
    42.      <rect>
    43.       <x>10</x>
    44.       <y>10</y>
    45.       <width>131</width>
    46.       <height>20</height>
    47.      </rect>
    48.     </property>
    49.     <property name="text">
    50.      <string>xxxxxx.co.uk</string>
    51.     </property>
    52.    </widget>
    53.    <widget class="QLineEdit" name="lineEdit_2">
    54.     <property name="geometry">
    55.      <rect>
    56.       <x>150</x>
    57.       <y>10</y>
    58.       <width>71</width>
    59.       <height>20</height>
    60.      </rect>
    61.     </property>
    62.     <property name="text">
    63.      <string>12345</string>
    64.     </property>
    65.    </widget>
    66.    <widget class="QLineEdit" name="lineEdit_3">
    67.     <property name="geometry">
    68.      <rect>
    69.       <x>10</x>
    70.       <y>32</y>
    71.       <width>211</width>
    72.       <height>20</height>
    73.      </rect>
    74.     </property>
    75.     <property name="text">
    76.      <string>Hello World TCP_Client</string>
    77.     </property>
    78.    </widget>
    79.   </widget>
    80.  </widget>
    81.  <layoutdefault spacing="6" margin="11"/>
    82.  <resources/>
    83.  <connections/>
    84. </ui>
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    Last edited by wysota; 19th January 2011 at 15:13. Reason: missing [code] tags
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