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Messages - arthuro

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1
Network / Re: Problem when sending big paquet with TCP
« on: August 08, 2013, 12:39:28 pm »
Thanks you for this clear reply ;)

edit:
Sorry if I don't understand English well but you say that every packet I receive on client-side was the start of a big packet on server-side. But when the problem appear, I get ever and ever a packet every time I try to receive somethings and I receive many more packets than the server send. Thus the packet I receive isn't the packet I send but something else I don't understand. A problem caused by incomplete packet.
But okay for the Send problem.

2
Network / Problem when sending big paquet with TCP
« on: August 07, 2013, 02:08:48 pm »
Hi,

I have some troubles when I try to send big packet with TCP.

When packets are too big, sending status become sf::Status::Not_Ready regardless on how much time I sleep the program.
When the server have problem, the receiving status of the client still sf::Status::Done and I receive the same packet indefinitely.

I already post a topic on the SFML French forum here--> http://fr.sfml-dev.org/forums/index.php?topic=12537
Laurent advise me to ask it on the English forum.

Some details:
  • I use SFML 2.1
  • I use not blocking sockets    ( everything work with blocking sockets)
  • I use the localhost (127.0.0.1) and 2 instances of my applications to test.
  • I use Linux (Lubuntu)

I have done a minimal code that reproduce this problem:

The serveur sends packets. Packets grow up by multipling its size by 2 each time.
If the sending status is NotReady, the program sleep during a time which is multiplied by 2 each time.

The client receives each packets.

#include <SFML/Network.hpp>
#include <iostream>

void sendBigPaquet(int size, sf::TcpSocket& socket, int timeout=1)
{
        std::cout<<"sending paquet size="<<size;
        sf::Packet paquet;
        paquet<<sf::Uint32(size);
        for(int i=0;i<size;++i)
        {
                paquet<<sf::Uint32(0);
        }
        switch (socket.send(paquet))
        {
                case sf::Socket::Done:
                        std::cout<<" Status : Done"<<std::endl;
                        break;
                case sf::Socket::NotReady:
                        std::cout<<" Status : NotReady"<<std::endl;
                        std::cout<<"waiting "<<timeout<<" secondes"<<std::endl;
                        sf::sleep(sf::seconds(timeout));
                        sendBigPaquet(size,socket,timeout*2);
                        break;
                case sf::Socket::Disconnected:
                        std::cout<<" Status : Diconnected"<<std::endl;
                        break;
                case sf::Socket::Error:
                        std::cout<<" Status : Error"<<std::endl;
                        break;
        }
}

void receiveBigPaquet(sf::TcpSocket& socket)
{
        sf::Packet paquet;
        switch (socket.receive(paquet))
        {
                case sf::Socket::Done:
                        std::cout<<"Status : Done ";
                        sf::Uint32 size;
                        paquet>>size;  
                        std::cout<<"receiving paquet size = " << int(size)<<std::endl;
                        //for(int i=0;i<int(size);++i)
                        //{
                                //sf::Uint32 b;
                                //paquet>>b;
                        //}
                break;
               
                case sf::Socket::NotReady:
                        std::cout<<"Status : Not ready"<<std::endl;
                        break;

                case sf::Socket::Disconnected:
                        std::cout<<"Status : Disconnected"<<std::endl;
                        break;
               
                case sf::Socket::Error:
                        std::cout<<"Status : Error"<<std::endl;
                        break;
        }
}


int main(int argc, const char *argv[])
{
        std::cout<<"server(0) ou client(1)"<<std::endl;
        int server;
        std::cin>>server;
        std::cout<<"port:"<<std::endl;
        int port;
        std::cin>>port;

        if (server==0)
        {
                // Server
                sf::TcpListener serverListener;
                sf::TcpSocket socket;
               
                socket.setBlocking(false);
                serverListener.setBlocking(false);
       
                serverListener.listen(port);
                while (serverListener.accept(socket)!=sf::Socket::Done)
                                sf::sleep(sf::seconds(0.3));
               
               
                int size=1;
                for(;;)
                {
                        sendBigPaquet(size,socket);    
                        sf::sleep(sf::seconds(1.0));
                        size*=2;
                }

        }
        else
        {
                // client
                sf::TcpSocket socket;
               
                socket.setBlocking(false);
               
                while(socket.connect("127.0.0.1",port)!=sf::Socket::Done)
                        sf::sleep(sf::seconds(0.3));
               
                for(;;)
                {
                        receiveBigPaquet(socket);
                        sf::sleep(sf::seconds(0.3));
                }
        }
        return 0;
}
 

And that is what I get for the server
./main
server(0) ou client(1)
0
port:
2222
sending paquet size=1 Status : Done
sending paquet size=2 Status : Done
sending paquet size=4 Status : Done
sending paquet size=8 Status : Done
sending paquet size=16 Status : Done
sending paquet size=32 Status : Done
sending paquet size=64 Status : Done
sending paquet size=128 Status : Done
sending paquet size=256 Status : Done
sending paquet size=512 Status : Done
sending paquet size=1024 Status : Done
sending paquet size=2048 Status : Done
sending paquet size=4096 Status : Done
sending paquet size=8192 Status : Done
sending paquet size=16384 Status : Done
sending paquet size=32768 Status : Done
sending paquet size=65536 Status : Done
sending paquet size=131072 Status : Done
sending paquet size=262144 Status : Done
sending paquet size=524288 Status : Done
sending paquet size=1048576 Status : NotReady
waiting 1 secondes
sending paquet size=1048576 Status : NotReady
waiting 2 secondes
sending paquet size=1048576 Status : NotReady
waiting 4 secondes
sending paquet size=1048576 Status : NotReady
waiting 8 secondes
 


And for the client
./main
server(0) ou client(1)
1
port:
2222
Status : Done receiving paquet size = 1
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 2
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 4
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 8
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 16
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 32
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 64
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 128
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 256
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 512
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 1024
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 2048
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 4096
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 8192
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 16384
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 32768
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 65536
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 131072
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 262144
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 524288
Status : Not ready
Status : Not ready
Status : Not ready
Status : Not ready
Status : Not ready
Status : Not ready
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
Status : Done receiving paquet size = 1048576
 




Anybody has an idea ?
Thanks.

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