Author Topic: UDP packet size (Read 2643 times)

Reiv · « **on:** June 09, 2011, 02:53:02 pm »

I am using sfml for my project and i want to ask what is the difference in size between sending bitstream(char *data, sizeof(data) and sending packet with data?

Because sizeof(sf::Packet) returns 32 B to and that seems to much to me.
Does this mean that if i make my own bitstream representation of packet (char *mypacket = "00011100 ...etc" (eg first 4 bites represents size of head etc..)) and it will be smaller than 32bytes is it than smaller then packet or does Send function wraps some other data on it?

Laurent · « **Reply #1 on:** June 09, 2011, 08:49:03 pm »

sf::Packet only adds an extra Uint32 to the packet data (but this has nothing to do with the size of sf::Packet being 32, just a coincidence).

Using 4 bits instead of 32 would limit the size of a packet to 15 bytes... this is really small.

Reiv · « **Reply #2 on:** June 09, 2011, 10:33:37 pm »

of course it was just example in reality it would be bigger, but since packet adds only 4 bytes i will stick with that, thanks for reply

Reiv · « **Reply #3 on:** June 16, 2011, 05:23:51 pm »

btw is there some way to send only bits? eg. for character direction in 2d game I would need only 4-bit information. (Dont look on portability right now)

Groogy · « **Reply #4 on:** June 16, 2011, 05:54:56 pm »

Quote from: "Reiv"

btw is there some way to send only bits? eg. for character direction in 2d game I would need only 4-bit information. (Dont look on portability right now)

No, smallest thing a computer can address is a byte, I am not experienced with network but I believe that is also the case for that field.