RE: [GD-General] UDP questions

[Jaek S. <smi...@cs...>]

> Given the feedback from you and others, however, it looks either 
> Beej's
> comments are wrong, or what he defines as a "packet" is something other 
> than a UDP packet (e.g. his own packet structure, etc.) and thus 
> possibly something that can become fragmented.  From looking at it, 
> though, it doesn't seem to be the case (i.e. the example he gives of a 
> simple chat protocol shouldn't have a case where it fragments at the 
> application level).

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.  Ex:

   if ((listener = socket(AF_INET, SOCK_STREAM, 0)) == -1) {

Thus... he is probably doing a message-over stream based protocol.

Calling recv will receive a single, complete datagram.  However, the following may be true (does someone want to verify these):

  - It may not be unique
  - It may be corrupt
  - It may be out of order

Later for now
--Jaek