RE: [GD-General] UDP questions

[Brian H. <bri...@py...>]

> Taking an extremely quick look at the link you sent, it looks 
> like the methods he is showing are for a stream (TCP) socket, 
> and not a datagram (UDP) socket.

Yeah, he bounces around a bit between the two.

I'm leery of saying the guy is wrong, because the guide is extremely
comprehensive -- I don't see how you could write something that big and
in-depth and screw up something as fundamental as UDP packet delivery
constraints.  So I was assuming I didn't understand what he was saying
(entirely likely).

> Calling recv will receive a single, complete datagram.  

Which his comments contradict.  This would seem _especially_ true of a
TCP implementation.

> However, the following may be true (does someone want to 
> verify these):
> 
>   - It may not be unique

True.

>   - It may be corrupt

This I'm not sure about -- isn't a CRC check part of the UDP and TCP
protocols, or is this something that every application is expected to
implement?  I know that some application protocols do CRC (e.g. Quake)
but I was under the impression this was more to stop cheating, not to
verify that the data wasn't corrupted.

>   - It may be out of order

Definitely.

Brian