[Roll] DAO Projection - identifying storing, non-storing P-DAO

[Rahul Jadhav <[e-mail]>]

Hello Pascal, WG,

When i started implementing storing mode P-DAO, i faced one problem,
... as per the draft the only way to identify storing P-DAO from
non-storing P-DAO is that storing P-DAO has at-least 2 VIOs whereas
non-storing P-DAO has only one VIO.
The problem with implementation is that i need to traverse the whole
P-DAO before i know whether it is storing or non-storing P-DAO and
populate the route table accordingly. This way either i have
to buffer VIO/via temporarily and then act. Otherwise i have to have a
2-pass traversal through the P-DAO to check whether it is storing or
non-storing first and then act on the fields in later pass.

If we can have a flag somewhere in the P-DAO header to signal storing
or non-storing then it would make implementation much simpler.

For interested ones, part implementation of DAO projection code is at:
https://github.com/whitefield-framework/contiki/tree/dao_projection
It currently supports registration/unregistration of projected routes
using non-storing P-DAO with +/- ACKing.

Regards,
Rahul