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Author Topic: UDP does not recieve second packet  (Read 2001 times)

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mvl

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UDP does not recieve second packet
« on: March 23, 2013, 06:10:04 pm »
I don't know what is wrong but the fist time it sends the coordinates
it recieves but the second time it just waits forever
I don't get it

this is my code
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Graphics.hpp>
#include <iostream>
#include <SFML/Network.hpp>

using namespace std;
////////////////////////////////////////////////////////////
/// Entry point of application
///
/// \return Application exit code
///
////////////////////////////////////////////////////////////
int main()
{
    int x=5,y=5;


    string choose;
    cout << "recieve or send:";
    cin >> choose;
    cout << endl;

    // Create the main rendering window
    sf::RenderWindow App(sf::VideoMode(800, 600, 32), "SFML Graphics");

    // Start game loop
    while (App.IsOpened())
    {
        // Process events
        sf::Event Event;
        while (App.GetEvent(Event))
        {
            // Close window : exit
            if (Event.Type == sf::Event::Closed)
                App.Close();

            // A key has been pressed
            if (Event.Type == sf::Event::KeyPressed)
            {
                // Escape key : exit
                if (Event.Key.Code == sf::Key::Escape)
                    App.Close();
            }
        }



        if(choose == "s"){
            x=10;
            y=10;
            //networking part
            // Create the UDP socket
            sf::SocketUDP Socket;

            sf::Packet send;
            send << x << y;
            cout << "send: "<< x << y <<endl;

            // Send data to "192.168.0.2" on port 4567
            if (Socket.Send(send, "127.0.0.1", 4567) != sf::Socket::Done)
            {
                cout << "error" << endl;
            }

        }else{
            // Create the UDP socket
            sf::SocketUDP Socket;

            // Bind it (listen) to the port 4567
            if (!Socket.Bind(4567))
            {
                // Error...
            }
            cout << "no error1" << endl;
            sf::Packet recieved;
            std::size_t r;
            sf::IPAddress ClientAddress;
            unsigned short ClientPort;
            cout << "no error2" << endl;
            if (Socket.Receive(recieved, ClientAddress,ClientPort) != sf::Socket::Done)
            {
                cout << "error somthing failes" << endl;
            }
            cout << "no error3" << endl;
            recieved >> x >> y;
            cout << "recieved :" << x << " " << y << endl;
        }

        // Clear the screen with red color
        App.Clear();

        App.Draw(sf::Shape::Rectangle(x,y,x+32,y+32,sf::Color::Red));

        // Display window contents on screen
        App.Display();
    }

    return EXIT_SUCCESS;
}
 

Ist in a infinite loop so it must work
Thanks

Laurent

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Re: UDP does not recieve second packet
« Reply #1 on: March 23, 2013, 07:38:40 pm »
It works for me. I tested with SFML 2, but I don't think that 1.6 has bugs that would make it not work.
Laurent Gomila - SFML developer

 

anything