[Click] Information sharing in Click

[Roman Chertov]

The easiest way to do this would be to just hack/modify the Packet class 
to include the fields that you need.  I suppose you could also use 
Unstrip() to grow the space in front of the packet and then stuff your 
data in there.  Just make sure that elements which are not aware of your 
structure are pointed to the correct location.

Roman

Adam M wrote:
> Hi folks,
> 
> Sorry for the barrage of questions, but I'm trying to field questions
> from colleagues/managers around here that I don't know the answer to.
> There is concern about the ability for Elements to share information
> with each other outside of the standard push/pull processing. Perhaps
> it's more clear if I give an example.
> 
> In our case, we're considering using Click for simulating a wireless
> network. In our simulation, we deal with things like radio transmission
> radius, contention of the physical medium, signal quality, etc.
> 
> When packets first arrive in the simulation, we'd like to have them
> analyzed and some results of that analysis stored somewhere. This
> analyzer would likely be an Element, and could either be a pass-through
> or we could hook it up using Tee.
> 
> Now, the issue is that the results of this early analysis are needed by
> numerous downstream Elements. For example, some distant downstream
> Element might need to know what our estimate is for signal quality
> between two nodes. What I don't understand is how an Element can serve
> as an information repository that other Elements can query and get a
> response. All of the Click examples I've seen are unidirectional, where
> Element A pushes to B, which pushes to C, etc.
> 
> I suspect that all this is possible in Click, but at the moment I don't
> see how to do it. Could someone please explain?
> 
> Thanks again,
> Adam
> _______________________________________________
> click mailing list
> click at amsterdam.lcs.mit.edu
> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>