Jan Kiszka <jan.kis...@...> writes:

> 
> S Saravanan wrote:
> > Hi,
> >    I am currently envisaging a replay tool using RTnet.
> > It will basically be a user space program that reads 
> > data from a storage device(basically a file) which was recorded earlier and 
> > then sends it in UDP packets with a precise user input 
> > inter packet gap in order  of micro-seconds on the wire.
> > 
> > I have the following doubts:
> > 
> > 1.I just propose to use the real time stack minus
> >   the RTmac assuming a dedicated ethernet segment.Are there
> >   any problems in this?
> 
> Nope.
> 
> > 2.Is this replay a right application to target using RTnet?    
> 
> Sounds like a nice application of RTnet, some real-time pktgen. Will it
> read pcap files? Would be cool if you could share your work once finished.
> 
> Jan
> 
> 
> 
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Basically the idea is to record real time UDP traffic coming from a
source A again using RTnet and then replay the recorded data to a 
destination B or broadcast it .Working at the socket level makes it simple 
because one needs it bind only once to a given destination or set up 
broadcast.Your idea of reading pcap files is great,it would mean two
things

1.Firstly the pcap file would have to be re-written to send it to 
destination B(like in tcpreplay).

2.Secondly if recording raw packets the recording program will have 
to filter ICMP,ARP etc at giagabit line rate without missing UDP 
packets.

First sustained recording and replay using RTnet has to be proved
and then i can proceed further.
And of course i would love to share anything i come up with.

With Regards,

S Saravanan
 





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