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There's a lot of programming to be done.  I've tried to break things
down into discrete tasks, here:

          critique architecture :-)

          add Opaque LSAs to HSLS routing implementation; finish Opaque
          LSA client API for name service to use

          program web interface for a user to set pass/block rules,
          nameservers, domain name

          write a library for originating/receiving 'domain',
          'nameserver', 'srv', and 'txt'-type Opaque LSAs (use cases
          #0-#5)

          configure nsd(8) based on received 'domain'-type LSAs (see
          use-case #0)

          for non-Zeroconf hosts, originate appropriate LSAs and emit
          IP-redirect directives for IP Filter (use-case #1)

          program library (or adapt existing) for Multicast DNS and
          DNS Service Discovery with support for both querying and
          responding to iChat TXT and SRV records (use-cases #2-#4) (docs
          at <http://www.multicastdns.org/> and <http://www.dns-sd.org/>)
          [The 'howl' library's callback API is a good start.  I
           am wary of the implementation code, the Apple license terms,
           and the IPv4-centrism....  There is an Apple library & API for
           POSIX, but I cannot find API docs except a line-wrapped .h,
           the license is questionable, and they make stupid assumptions
           (like running mDNS on *every* interface, sheesh).]

          issue appropriate SRV / TXT records for received
          'srv'/'txt'-type Opaque LSAs

          apply pass/block filters to SRV records; originate appropriate
          LSAs and emit IP-redirect directives for IP Filter (use-cases
          #2-#4)

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