BIND 10 #2110: redefine in-memory zone finder (wildcard)

[BIND 10 Development]

#2110: redefine in-memory zone finder (wildcard)
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                   Reporter:         |                 Owner:
  jinmei                             |                Status:  new
                       Type:  task   |             Milestone:
                   Priority:         |            Resolution:
  medium                             |             Sensitive:  0
                  Component:  data   |           Sub-Project:  DNS
  source                             |  Estimated Difficulty:  5
                   Keywords:         |           Total Hours:  0
            Defect Severity:  N/A    |
Feature Depending on Ticket:         |
  scalable inmemory                  |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Description changed by jinmei:

Old description:

> On top of #2109, we extend the new finder find() for the case of
> wildcard substitution.  When building a resulting `TreeNodeRRset`,
> allocate its "wild data" buffer from some pool (maybe in the data
> source client or finder) and build the expanded name label data there.
>
> Make sure TreeNodeRRset::toWire() use that data.

New description:

 On top of #2109, we extend the new finder find() for the case of
 wildcard substitution.  When building a resulting `TreeNodeRRset`,
 allocate its "wild data" buffer from some pool (maybe in the data
 source client or finder) and build the expanded name label data there.

 Make sure TreeNodeRRset::toWire() use that data.

 See also #2150.  If we agree on that approach, #2150 should (better)
 be done first.

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Ticket URL: <http://bind10.isc.org/ticket/2110#comment:2>
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