Re: ipsets: examples?

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On Tue, 21 Dec 2010, Reuben Martin wrote:

> I want to be able to do:
> 
> ... -j MY_TARGET --ipset foo
> 
> where MY_TARGET would iterate over the members of foo, and for each
> member of foo the original packet is duplicated, the duplicate's
> destination is changed to the address value of the member, checksums
> recalculated, and sent on it's way.
> 
> My intent is to be able to take RTP media stream packets, and
> transparently forward them to a dynamically changing group of
> destination addresses.in a network where multicast is not an option.
> I'm sure there might be other uses for it, but that's all I'm
> concerned about at the moment.

I see. Sorry, it's not possible to use ipset for this purpose: there are 
no iterators which'd return the members of a set (listing is not similar 
or applicable). To design such an interface is not trivial. Maybe instead 
of iterating, passing your function to ipset is more feasible: ipset would 
call your function for every member of the given set.

(I Cc-ed netfilter-devel, because that's more appropriate list for such a 
discussion.)

Best regards,
Jozsef
-
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