UDP packet size

Blitz3D Forums/Blitz3D Programming/UDP packet size

LAB[au] (Posted 2005) [#1]

it seems that udpstreams are limited to more or less 8000 bytes, above that sendudpmsg fails to send the stream. Does anyone knows about this limitation?

KuRiX (Posted 2005) [#2]

There is a limit on the UDP packet size. I thought it was about 2500, but could be what you say. Here you can read about the maximum datagram packet size: http://forum.java.sun.com/thread.jspa?threadID=668796&messageID=3914070 You need to split your message into sub packets to avoid this limit... Good Luck, Cheers, KuRi

LAB[au] (Posted 2005) [#3]

Thanks for the info, according to my tests, the largest UDP packet you can send under winXP+Blitz3D is 8192 bytes, minus the 28 bytes for IP/UDP headers that makes that the maximum packet you can send is 8166 bytes (tested succesfully).

t3K|Mac (Posted 2005) [#4]

this should be fairly enough data per packet.

LAB[au] (Posted 2005) [#5]

Not if you are trying to send 320*240 RGBA image.

Mighty Raven (Posted 2005) [#6]

Thanks alot for the info, I'm ready to try my first test the BB network.

Mighty Raven (Posted 2005) [#7]

Thanks alot for the info, I'm ready to try my first test with the networking in BB.

KuRiX (Posted 2005) [#8]

LAB, just divide the image and send 4 or more packets... along with a number packet, then you can reconstruct the image at the other side :D Or use my free Raknet wrapper that does this for you!

LAB[au] (Posted 2005) [#9]

Yep Kurix I have solved it this way, with numbered packets, altough it took me some time to understand what was going wrong, until I found the UDP packet size limitation.

Techlord (Posted 2005) [#10]

508 bytes for optimum performance.