[vlc] Re: vlm experiences

[Marian Durkovic]

On Thu, Dec 22, 2005 at 06:33:43PM -0700, Warren Young wrote:
> list at scttransport.dk wrote:
> >VLM currently has a DOS bug
> >
> >Meaning it will keep sending data to clients even after they have stopped
> >watching the stream, if they don't close it by pressing stop
> 
> This may not be something that VLC can do something about.  RTSP is a 
> UDP-based protocol, meaning that the server just blindly throws packets 
> at the client.  There is nothing at the UDP level to say whether a given 
> packet is received, lost, duplicated, or mangled; the server just hopes 
> for the best and keeps throwing packets at the client.  If the client 
> goes away without explicitly telling the server to stop sending packets, 
> you'll get the very symptom you describe. 

Well, not necessarily. A decent OS is expected to send back ICMP
PORT_UNREACHABLE message if it receives packet for which no application 
is listening. This is how e.g. traceroute works.


	With kind regards,

		M.

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