commit 6a92ffb100c691da190416f9b2556abf2c7117cc
author Ruslan Ermilov <ru@nginx.com> Thu Dec 17 17:21:16 2015 +0300
committer Ruslan Ermilov <ru@nginx.com> Thu Dec 17 17:21:16 2015 +0300
tree 1e55cfaf5c6f757e2a82348632a30c3e8a33284d
parent 441e93ba84998e40652f018e675e0e8ae64c9748

Resolver: improved PTR response processing.

The previous code only parsed the first answer, without checking its
type, and required a compressed RR name.

The new code checks the RR type, supports responses with multiple
answers, and doesn't require the RR name to be compressed.

This has a side effect in limited support of CNAME.  If a response
includes both CNAME and PTR RRs, like when recursion is enabled on
the server, PTR RR is handled.

Full CNAME support in PTR response is not implemented in this change.