On Fri, Apr 6, 2012 at 5:33 AM, Senthil Kumar S <senthilkuma...@sasken.com> wrote: > Hi Aaron, > > Thanks for a brief explanation. Our aplication/software actually does not > listen in any interface. Application/Software runs in centos pc as already > mentioned. > > Our application/software takes the packets from the tcp/ip stack (after the > packets reached the tcp/ip stack of cent-os) and then do some processing. > > Due to the confidentiality of this app/software, I am really sorry that I > cannot go beyond this limit, but this is how our app/soft works. > > I suspect packets replayed through tcpreplay didn't reach the tcp/ip stack. > > Am I doing anything wrong in the modification of pcap ???
The way you're describing your DUT makes me believe that you're opening a standard TCP socket on both DUT interfaces. And then you're trying to use tcpreplay to send client traffic to one socket/interface and server traffic to the other. As I explained in an earlier thread, you can't use tcpreplay to send traffic to DUT's which listen on a standard TCP socket. Ie: if you're doing something like this in your code: fd = socket(AF_INET, SOCK_STREAM, 0); then you have a 0% chance of it ever working because tcpreplay doesn't know how to respond to the TCP 3 way handshake required of a real TCP/IP stack on an endpoint. Game over. If you're not doing what I've just described above, you're going to have to pull back the veil of secrecy a little and explain what you are doing and how your DUT works. If you're not able to do that on a public forum, I'm available as a consultant and I can sign an NDA. If interested, email me off-list and we can talk further. But if you can't explain it any more then sorry, but I won't be able to help you further. Regards, Aaron -- Aaron Turner http://synfin.net/ Twitter: @synfinatic http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. -- Benjamin Franklin "carpe diem quam minimum credula postero" ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Tcpreplay-users mailing list Tcpreplay-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tcpreplay-users Support Information: http://tcpreplay.synfin.net/trac/wiki/Support
