[Click] packet size

[Koen Segers]

Hi,

I'm working on an evaluation of my protocol, which was created in nsclick. I 
need to check the packet size of my messages. I wrote my own tosimdump 
element to add extra info into the ns2 tracefiles. The problem I'm having is 
that the packet size written by click is not the same as the packet size 
written by ns2, while they are printing information about the same packet.

The difference between the two size is allways 38 bytes. This is suspicous 
(ethernet + ip + udp).

According to ethereal, click reports the correct packet size. 

So do I need to substract 38 bytes from every packet size reported by ns2 to 
get the real packet size? If so, why?

greetz
-- 

Koen Segers
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