Hi Eddy,
On Thu, Oct 20, 2016 at 3:58 PM, Eddy G <eddyg...@gmail.com> wrote:
> It does not seem like it is possible to do something like:
>
> const16(dinc(1,1023))
>
> because 1) dinc() and ddec() are limited to single octets, and 2) you can't
> nest dinc() or ddec() inside the c* helpers.
>
> The above would be useful to allow a dynamic trafgen cfg that iterates
> through a range of source/destination ports (for example).
>
> Is expanding dinc()/ddec() to allow values larger than an octet and
> "nesting" of other helper functions inside the c*() helpers something that
> has been discussed?
>
> Or perhaps a plan to add dinc16() / ddec16(), dinc32()/ddec32(), etc.?
Well, the easier way might be to add new dinc16/32 ddec16/32 in the
way like there
are other func16/32(...).
>
>
> Also, the new protocol header functions are terrific, but are limited by
> their inability to prevent more complex / partial dynamic configuration
> parameters as values. For example:
>
> eth(da=00:53:00:dinc(0,1):drnd(2))
> ipv4(da=1.2.drnd(2))
>
> Any possibility this is something that has been discussed? Such partial
> constructs would be *very* useful in generating randomized traffic for
> testing purposes.
I'd focus 1st on proto functions and then move to the low-level functions,
and I'd propose the following (for example) way to apply
dynamic funcs to the part of field:
eth(sa=<initial value>, sa[from:to]=dinc())
ftom:to - in bytes offset, it might be also [from:len], not sure what
would be better.
Currently I don't know exactly if it will hard to parse this, just an
proposal for the syntax.
>
>
> Thanks,
> Eddy
>
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All these ideas look reasonable to add to trafgen.
Thanks,
Vadim Kochan
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