RE: [GD-General] RE: Gamedevlists-general digest, Vol 1 #79 - 3 msgs

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

> Thats the whole point of the article, to my eye.  Establishing a protocol
> such that the sender includes enough information that the reciever knows
> where the packet boundaries are, once their udp packets have been
> converted into a meaningless byte stream (which is what the buffering
> inside recv() does for you)

Datagrams are never really converted to a 'meaningless byte stream'.

Here's part of the man-page on recv():

  "All  three  routines return the length of the message on
  successful completion.  If a message is too long to fit in
  the supplied buffer, excess bytes may be discarded depending
  on the  type  of socket the message is received from..."

Thus, for a datagram (UDP), you would generally lose the excess amount.  Generally, you want to pass a buffer the size of your maximum sized message.  (Note: 64K should be the max possible size for UDP - if I recall correctly).

--Jaek