BIND 10 #2057: ZoneFinder::Context::getWildcardProof

[BIND 10 Development]

#2057: ZoneFinder::Context::getWildcardProof
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            Reporter:  jinmei        |                        Owner:
                Type:  task          |                       Status:  new
            Priority:  medium        |                    Milestone:  Next-
           Component:  data source   |  Sprint-Proposed
           Sensitive:  0             |                     Keywords:
         Sub-Project:  DNS           |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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 See #2056 for background.  This is another one of such things,
 referring to trac1607exp branch:

 {{{#!cpp
     // Called for SUCCESS/CNAME cases when it's wildcard substitution
     // and return NSEC/NSEC3 RRset that proves the original qname doesn't
     // exist in the zone.
     // - With NSEC
     //     Default version: calls find() for the qname again, with the
     //       NO_WILDCARD option and add the returned NSEC.
     //     Optimized in-memory version: same for the NSEC + NXRRSET case
 above.
     // - With NSEC3
     //     Default version: call findNSEC3() in the recursive mode and
 returns
     //       the NSEC3 covering the next closer name.
     //     Optimized in-memory version: Like the NSEC case it should know
 the
     //       closest encloser in the original search and easily construct
 the
     //       next closer name from it.  Then calculate hash for it and
 search
     //       for the covering NSEC3.
 }}}

 And in this ticket we'll only need to do the "default version".  It
 should be essentially straightforward refactoring.

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Ticket URL: <http://bind10.isc.org/ticket/2057>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development