From: Randy General <randygeneral@...>
Date: 2009-11-20T19:23:59+09:00
Subject: Re: UDP Proxy

Hi Brian,

> I suspect what you're trying to do is handle
>     a --> proxy --> b
> and
>    a <-- proxy <-- b


"It also seems strange to me your requirement that if the proxy is
listening on port X, then it must also send with a source port of X.
That's not normally a requirement for a proxy, but then you haven't
really said much about the protocol itself."

I was mistaken there, what I meant to say was what you diagramed later 
where the source ports, while different on each side, remained 
consistent for each client.

> Anyway, in your code, life would be much easier if you bound two 
> different sockets (either on different ports, or on different IPs).
> 
>           X         Y
>    a ------> proxy -------> b
> 
> because you could select() on the two sockets, and easily distinguish 
> outbound from return packets.

Great, thanks for the suggestion. I was trying to think of how to deal 
with outgoing packet for which there's no response, that will hopefully 
take care of it.

I'll post what I come up with in here shortly.

Thanks for all of your help!
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