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

[BIND 10 Development]

#2057: ZoneFinder::Context::getWildcardProof
-------------------------------------------+----------------------------
                   Reporter:  jinmei       |                 Owner:
                       Type:  task         |                Status:  new
                   Priority:  medium       |             Milestone:
                  Component:  data source  |            Resolution:
                   Keywords:               |             Sensitive:  0
            Defect Severity:  N/A          |           Sub-Project:  DNS
Feature Depending on Ticket:               |  Estimated Difficulty:  4
        Add Hours to Ticket:  0            |           Total Hours:  0
                  Internal?:  0            |
-------------------------------------------+----------------------------
Description changed by jinmei:

Old description:

> 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.

New description:

 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.

 When done, also update `auth::Query` so it uses this implementation.
 It's better to do it before trying to implement the in-memory
 optimization in case we miss something in the interface.

--

-- 
Ticket URL: <http://bind10.isc.org/ticket/2057#comment:2>
BIND 10 Development <http://bind10.isc.org>
BIND 10 Development