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1

Network / UDP transfer is stopping

« on: January 18, 2021, 03:54:04 pm »

Hello, It's my first time working with Network in SFML
In general, I'm trying to send OpenCV cv::Mat by UDP Package, but for now, I'm just trying to get a constant stream of data.
Unfortunately, there's something wrong with my program - or I'm don't quite understand something :<


Sending side (to minimalize errors, I do not use a loop and just execute the sending program a few times):

(click to show/hide)

{
   sf::IpAddress recipient = "10.3.189.55";
   unsigned short port = 54000;
   sf::UdpSocket socket;


   if (socket.bind(54000) != sf::Socket::Done)
   {
      return -1;
   }


   char data[100];
   sprintf(data, "Package #");


   if (socket.send(data, 10, recipient, port) != sf::Socket::Done)
   {
      return -2;
   }


   return 0;
}

And receiving side :

(click to show/hide)

{
   sf::UdpSocket socket;
   unsigned short port = 54000;


   if (socket.bind(54000) != sf::Socket::Done)
   {
      return -1;
   }


   sf::IpAddress sender;
   std::size_t received;
   while (true)
   {
      char data[100] = "";


      if (socket.receive(data, 100, received, sender, port) != sf::Socket::Done)
      {
         std::cout << "Error while reading\n";
         continue;
      }
      std::cout << "Received " << received << " bytes from " << sender << " on port " << port << "\n"
              << data << std::endl;
   }
   return 0;
}

After exactly 5 messages, receiving stop and resume only after some time (~minute or two) - which is obviously not good, I have no idea what I'm doing wrong

PS: One more question. Do I understand correctly that if I use sf::Packet then I don't need to be concerned about sf::UdpSocket::MaxDatagramSize?