[ENet-discuss] Problem with sending packets of certain sizes (near MTU)

[Lee Salzman]

Are you using version 1.1 of ENet?

Lee

Steffen Kolodziej wrote:
> Hi!
> I'm using enet - which I like a lot - with a basic-like programming 
> language called BlitzMax. BlitzMax is somewhat able to interface with 
> C/C++-code, but not quite smoothly. I had to write my own wrapper to 
> make use of it. Therefore my error may be caused by other factors than 
> enet, but I have no idea where else to post it.
> Whenever I send (reliable, not checked for unreliable) packets with a 
> size of more than 1356 bytes, they don't get to the recipient as well as 
> any other packets sent in the same direction after it. Sending packets 
> in the other direction still works and the connection is not noted to be 
> dead by enet.
> Looked like a MTU issue to me, but when i tried to send packets with 
> significantly larger sizes (~2500 bytes) they worked perfectly, so 
> packet fragmenting seems to work at least partly. Checking the MTU from 
> my PC to the server via Ping in the console returned 1492 or 1500 (???) 
> - not sure which one is right, but they're both quite a bit larger than 
> enet's standard MTU of 1400 or the packet size at which i encountered 
> the problem. I tried to change the server's enet's MTU, but it didn't 
> help either. I'm not sure if i really changed it, though, because 
> accessing the enet host's data fields is quite complicated through BlitzMax.
> I guess the problem is caused by my configuration in some way, and not 
> by enet, but i have no idea how to debug it and hope for some clues by a 
> enet expert.
> 
> Thank you for the otherwise great network library.
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