[ENet-discuss] NAT hole punching with Enet - query on an approach

[Lee Salzman]

Almost anything that doesn't look ike a valid ENet packet will be ignored.

Lee

M. Rijks wrote:
> Thank you for your reaction Shawn.
>
> Yes, I considered sending around UDP packets before getting ENet in 
> the equation. However, I have a timing issue there. After the game 
> server has punched through towards the client IP+port, I need to find 
> an appropriate time for the client to initiate the ENet connection on 
> the other end. But I don't exactly know if, or when, the server's 
> punch packet arrives at the client. I can't wait for its arrival since 
> the client's firewall may block it entirely. So there is the risk that 
> when I finally tell the client to initiate its connection to the 
> server, it first receives the UDP packet that was used to merely punch 
> the server-end hole. It will most likely contain data that will make 
> no sense to the client, throwing off ENet's connection protocol.
>
> Maybe I should change my question into "what kind of UDP packet 
> content will ENet happily ignore when waiting for the connection to 
> establish?" :)
>
> Cheers,
>
> Martin
>