On Wed, Oct 19, 2016 at 1:38 PM, <emacsuser...@gmail.com> wrote:
> Hello.
>
> I'm having a problem when trying to send packets with trafgen to the loopback
> interface.
>
> Packets sent this way do not reach their destination.
>
> However, if packets are sent from an external machine, then I have no problem
> at all to receive these packets at the destination application.
>
> I use "-o lo" option on the command line when executing trafgen.
>
> I suspect the problem is that I'm building an incorrect packet, and the
> kernel is discarding it.
>
> The ethernet header on my cfg file looks like the following:
>
> --------------------------------------
> #include <stddef.h>
>
> {
> fill(0x00, ETH_ALEN),
> fill(0x00, ETH_ALEN),
> c16(ETH_P_LOOP),
> c32(0x00),
>
> ......
>
> (Both source and destination IP addresses are set to 127.0.0.1)
> --------------------------------------
>
> I have tried other combinations, like removing the ethernet header
> completely, for instance.
>
> None of them worked.
>
> How does the ethernet header have to to look like, when you want trafgen to
> generate a valid packet to be sent thru the loopback interface?
>
> Thanks a lot.
> -Bob
>
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Hi Bob,
Does it work if to increase packet length to 64 bytes length ?
Sorry, I have no time to check it right now, will do it later if the
above's approach did not help.
Regards,
Vadim Kochan
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