BIND 10 #145: DNAME-CNAME synthesis can throw if the result is too long.

[BIND 10 Development]

#145: DNAME-CNAME synthesis can throw if the result is too long.
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                 Reporter:  jinmei   |                Owner:  UnAssigned
                     Type:  defect   |               Status:  assigned
                 Priority:           |            Milestone:  feature
  critical                           |  backlog item
                Component:  data     |           Resolution:
  source                             |            Sensitive:  0
                 Keywords:           |  Add Hours to Ticket:
Estimated Number of Hours:  0.0      |          Total Hours:
                Billable?:  0        |
                Internal?:  0        |
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Comment (by jreed):

 I tested using the b10-resolver in default interative mode. I set up two
 labels elsewhere that are too long and one that is shorter that works.

 Yes, it does return SERVFAIL. The authoritative server sent back the DNAME
 (but no CNAME) for when the synthesized DNAME is too long.

 But it also returns a SERVFAIL for shorter DNAME that synthesized CNAME is
 short enough. The authoritative server sent back a DNAME and a CNAME (I
 also watch with tcpdump). But the b10-resolver only returned a SERVFAIL. I
 doesn't seem to know how to handle that response. Should this be a
 different ticket?

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Ticket URL: <https://bind10.isc.org/ticket/145#comment:11>
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