Hello, Thanks for your reply Bob.
I am trying to get it working the way I have explained...the only thing is that my raw socket script stops running when I execute Iperf client: - if I run my own packet transmitter, I can send as many packets as I want and the raw socket script does not end, just keep waiting for more packets to receive (I am using the function "recvfrom") -when I execute Iperf, it receives one packet, and just ends almost immediately (like as I had done ctrl+c) Any hint on why this happens? Might it the way Iperf handles the connection? Cheers, Christian On Sat, 8 Jun 2019, 00:15 Bob McMahon, <bob.mcma...@broadcom.com> wrote: > It sorta makes sense but not sure. My answers are from an iperf 2 > perspective. > > Currently, there is no way from the command line to add a header to the > UDP payload. It would have to be done in source code or by something like > linux tc or ip tables. > > The iperf client doesn't require an iperf server for it to send packets. > It just needs arp to be resolved. So a VB can receive traffic from client > (or transmit) only. > > Yes, I think you can get the measurements from the second computer > assuming the packet payload has what's expected for it to make the > computations. > > Bob > > On Fri, Jun 7, 2019 at 9:22 AM Christian Sánchez <crisanc...@gmail.com> > wrote: > >> Hi, >> Probably the topic is not very helpful...Let me explain my situation in >> more detail: I need to modify the UDP payload generated by Iperf, so I can >> add an additional header to it. My idea is to run an Iperf client in a >> computer, and use this client to send traffic to a virtual box in the same >> computer. In the virtual box I would be running a script using a raw socket >> to receive the data. After receiving it, and adding the header, I send it >> to another Iperf server (in another computer), which would receive the data >> after having removed the header. >> My questions: >> I don't have a clear understanding of the working details of Iperf, does >> what I have explained above make sense at all to you? >> Can I expect to get traffic in the VB from the client even when I'm not >> running any server in the VB? >> If by any chance I finally get traffic in the second computer, can I >> expect it to perform correct measures from the traffic generated by the >> client? >> >> Cheers >> Christian >> _______________________________________________ >> Iperf-users mailing list >> Iperf-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/iperf-users >> >
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