TCP chat

[zoe9]

To juz kolejny problem z TCP w QT.
Napisalem sobie prymitywna aplikacje chatu, jednak na serwerze kiedy chce wyslac wiadomosc pokazuje sie error i zamyka aplikacje. Niewiem jak to naprawic, na kliencie bo wcisnieciu buttona tekst znika i nie ma zadnego bledu.

To moje kody zrodlowe:
server.pro

#-------------------------------------------------
#
# Project created by QtCreator 2016-01-17T12:45:39
#
#-------------------------------------------------

QT       += core gui
QT       += network
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = server
TEMPLATE = app


SOURCES += main.cpp\
        server.cpp

HEADERS  += server.h

FORMS    += server.ui

server.h

#ifndef SERVER_H
#define SERVER_H

#include <QMainWindow>
#include <QTcpServer>
#include <QTcpSocket>
#include <QHostAddress>
#include <QList>

namespace Ui {
class server;
}

class server : public QMainWindow
{
    Q_OBJECT

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

public slots:
    void connect_new();
    void leer_socketclient();

private slots:
    void on_pushButton_clicked();

private:
    Ui::server *ui;
    QTcpServer *tcpserver;
    QTcpSocket *tcpclient;
};

#endif // SERVER_H

server.cpp

#include "server.h"
#include "ui_server.h"

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

    tcpserver = new QTcpServer (this);
    //tcpserver->setMaxPendingConnections();

    tcpserver->listen(QHostAddress::LocalHost, 1234);
    connect(tcpserver, SIGNAL(newConnection()), this, SLOT(connect_new()));
}

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

void server::connect_new()
{
    //tcpclient = tcpserver->nextPendingConnection();
    connect(tcpclient, SIGNAL(readyRead()), this, SLOT(leer_socketclient()));
}

void server::leer_socketclient()
{
    QByteArray buffer;
    buffer.resize( tcpclient->bytesAvailable() );
    tcpclient->read( buffer.data(), buffer.size() );
    ui->plainTextEdit->setReadOnly( true );
    ui->plainTextEdit->appendPlainText( QString (buffer));
}

void server::on_pushButton_clicked()
{
    tcpclient->write( ui->lineEdit->text().toLatin1().data(), ui->lineEdit->text().size());
    ui->lineEdit->clear();
}

main.cpp

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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    server w;
    w.show();

    return a.exec();
}

============================================================================
client.pro

#-------------------------------------------------
#
# Project created by QtCreator 2016-01-17T12:22:05
#
#-------------------------------------------------

QT       += core gui
QT       += network
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = client
TEMPLATE = app


SOURCES += main.cpp\
        client.cpp

HEADERS  += client.h

FORMS    += client.ui

client.h

#ifndef CLIENT_H
#define CLIENT_H

#include <QMainWindow>
#include <QTcpSocket>
#include <QHostAddress>
#include <QList>

namespace Ui {
class client;
}

class client : public QMainWindow
{
    Q_OBJECT

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


private slots:
    void on_pushButton_clicked();

public slots:
    void leer_socketserver();

private:
    Ui::client *ui;

    QTcpSocket *tcpclient;
};

#endif // CLIENT_H

client.cpp

#include "client.h"
#include "ui_client.h"

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

    tcpclient = new QTcpSocket (this);

    tcpclient->connectToHost( QHostAddress::LocalHost , 1234);

    connect (tcpclient, SIGNAL (readyRead()), this, SLOT (leer_socketserver()));
}

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

void client::on_pushButton_clicked()
{
    tcpclient->write( ui->lineEdit->text().toLatin1().data(), ui->lineEdit->text().size());
    ui->lineEdit->clear();
}

void client::leer_socketserver()
{
    QByteArray buffer;
    buffer.resize( tcpclient->bytesAvailable() );
    tcpclient->read( buffer.data(), buffer.size() );
    ui->plainTextEdit->setReadOnly( true );
    ui->plainTextEdit->appendPlainText( QString (buffer));
}

main.cpp

#include "client.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    client w;
    w.show();

    return a.exec();
}

[zoe9]

Udalo mi sie naprawic usuwajac w server.cpp

tcpserver->newConnection();
//i dodajac
tcpclient = new QTcpSocket (this);

Jednak pojawil sie kolejny problem. Wiadomosci dochodza kiedy odpale na 1 pc. Kiedy chce to zrobic na 2 podlaczonych do 1 routera, wiadomosci nie dochodza, a po stronie servera w 3 zakladce (komunikaty aplikacji) po probie wyslania wiadomosci pojawia sie :

QIODevice::write (QTcpSocket): device not open