Using UDP multi client with single server how to do?

Reply to Using UDP multi client with single server how to do? on Sat, 25 Aug 2018 06:32:49 GMT

bhargav — Sat, 25 Aug 2018 06:32:49 GMT

Here i am testing in single computer. so i thought local host means 127.0.0.1?

Reply to Using UDP multi client with single server how to do? on Sat, 25 Aug 2018 05:52:48 GMT

VRonin — Sat, 25 Aug 2018 05:52:48 GMT

@bhargav said in Using UDP multi client with single server how to do?:

serudpSocket->writeDatagram(clientData, QHostAddress::LocalHost, port );

you are sending to QHostAddress::LocalHost instead of sender

Reply to Using UDP multi client with single server how to do? on Sat, 25 Aug 2018 05:50:48 GMT

bhargav — Sat, 25 Aug 2018 05:50:48 GMT

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

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

    setWindowTitle("Server App");

    serudpSocket = new QUdpSocket();

    serudpSocket->bind(QHostAddress::Any, 6000);

    connect(serudpSocket, SIGNAL(readyRead()), this, SLOT(readingmsg()));

    connect(serudpSocket, SIGNAL(disconnected()), this, SLOT(deleteLater()));


}

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

void MainWindow::readingmsg()
{

        // reading from client
        QByteArray buffer;

        buffer.resize(serudpSocket->pendingDatagramSize());

        QHostAddress sender;
        quint16 port;

        qDebug()<<"port in reading:"<readDatagram(buffer.data(),buffer.size(),&sender,&port);

        ui->textEdit->setText(buffer);


        // Writing to the client,need to specify the client port number.

  //      static int i;
        QByteArray clientData;

        QString str = "reply";

//        QString index = QString::number(i);

        clientData.append(str);

        serudpSocket->writeDatagram(clientData, QHostAddress::LocalHost, port );

        // for debugging
        qDebug()<<"Datagram Recieved From client: "<< buffer.data();
        qDebug()<<"Client IP" << sender.toString();
        qDebug()<<"port in sending:"<< port;
        qDebug()<<"Datagram sending to client:"<< clientData.data();
        qDebug()<<"\n";

      //  i++;
}

this is my code help me to get desired output?

multi client single server
when client1 sends "test1" it has to send back "reply1"
when client1 sends "test2" it has to send back "reply2" like that ?

Reply to Using UDP multi client with single server how to do? on Fri, 24 Aug 2018 12:53:34 GMT

JonB — Fri, 24 Aug 2018 12:53:34 GMT

@bhargav
Can you even do this with UDP?? "Send replies back"? It makes no sense. For one thing, the client may (well) not even receive the datagram...

Reply to Using UDP multi client with single server how to do? on Fri, 24 Aug 2018 08:56:19 GMT

VRonin — Fri, 24 Aug 2018 08:56:19 GMT

QTcpSocket and QUdpSocket are both QIODevices so you can read/write them in the exact same way