NDN hub discovery procedure¶

1. Add multicast face, issue interest for /local/ndn/udp

*   if data returned, configure face to the hub and finish auto-config

*   auto-configured face is remembered using creating a "fake" route to ``/autoconf`` prefix

1. If previous step failed, issue the following DNS query using dig command

   dig +search +short +cmd +tries=2 +ndots=10 _nfd._udp srv
   

*   if valid data returned, get the first returned data, configure face, and finish auto-config

*   auto-configured face is remembered using creating a "fake" route to /autoconf prefix

1. If previous steps failed:

*   Obtain name of the default certificate configured for the user

*   Try to extract site-specific part from the certificate name (TBD).  If failed, abort auto-configuration step.

*   Append ``_homehub._autoconf.named-data.net.`` postfix to the site-specific DNSified name, e.g.

        alex.ucla.edu._homehub._autoconf.named-data.net.

*   Issue a SRV dns query with ``_ndnx._udp`` prefix (not really necessary, but should do it for clarity)