[Nfd-dev] Clarification on usage of ChildSelector in Content Store

Junxiao Shi shijunxiao at email.arizona.edu
Thu Mar 17 21:09:07 PDT 2016


Hi Bastiaan

The two attachments on #1706 <http://redmine.named-data.net/issues/1706> is
worth a read. These are the main design documents of CS lookup procedure,
although one of them are originally designed for the repo.

Yours, Junxiao

On Thu, Mar 17, 2016 at 2:47 AM, Wissingh, B.F. (Bastiaan) <
bastiaan.wissingh at tno.nl> wrote:

> Hi,
>
> I’m currently trying to figure out how exactly NFD matches an Interest on
> a Content Store object by looking through the nfd code. So far I understand
> the process, the function Cs::find seems to be the “general entry” used by
> the forwarder to request the Content Store to find a match for an Interest
> it received, however it is not really clear to me how the ChildSelector
> parameter of an Interest is used here. Based on the value, it will either
> try to find a LeftMost or RightMost match.
>
> I found some explanatory documentation on (
> http://named-data.net/doc/ndn-tlv/interest.html#childselector), however
> with the example given there I’m still not quite sure what the purpose is
> and how it works.
>
> Could some of you provide me with a more extensive example on this?
>
> Thank you,
> Bastiaan Wissingh
>
>
>
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