[ns] R: why RTP header in UDP's sendmsg() ?

[Marco Fiore]

Hi Timo,

my guess is that those infos can be useful for
statistics 
collection. Is the RTP header considered
in the UDP header size? If 
not, it is an "invisible"
header, put there just for informational 
purposes
and not affecting the simulation outcome.

bye,

Marco


>----
Messaggio originale----
>Da: t.reimann at lancaster.ac.uk
>Data: 4-apr-
2007 4.37 PM
>A: <ns-users at ISI.EDU>
>Ogg: [ns] why RTP header in 
UDP&#39;s sendmsg() ?
>
>
>Hiya,
>
>I'm not sure if this issue rather 
belongs to the dev-mailinglist instead
>of the users' one but since 
it's just a question and not some sort of
>contribution I'll try here 
first:
>
>I've looked at the UDP code (in apps/udp.cc) and came to 
realize that
>everytime the sendmsg() function is called a RTP header 
is put on top of
>the packet, including (talk burst) flags, sequence 
number, and a time
>stamp.
>
>Just wondering: What's the rationale 
behind this?
>
>
>Cheers,
>
>--Timo
>
>