drill(1) with IPv6 NS fails with UDP but works with TCP
YONETANI Tomokazu reported this issue on users@ mailing list: https://lists.dragonflybsd.org/pipermail/users/2021-August/404805.html
$ drill @2001:4860:4860::8888 aaaa leaf.dragonflybsd.org | egrep -v '^(\;|$)' Error: error sending query: Could not send or receive, because of network error
unless using TCP query:
$ drill -t @2001:4860:4860::8888 aaaa leaf.dragonflybsd.org | egrep -v '^(\;|$)' leaf.dragonflybsd.org. 3599 IN AAAA 2001:470:1:43b:1::68
Similar DNS queries on other boxes running different OSes don't have the same problem, and tcpdump output shows the response from the DNS server, so I doubt it's an network issue.
$ uname -a DragonFly c60 6.0-RELEASE DragonFly v126.96.36.199.gc7b638-RELEASE #0: Wed Aug 4 20:25:25 JST 2021 root at c60:/usr/obj/build/usr/src/sys/X86_64_GENERIC x86_64
I also confirmed this issue on leaf, which running master as of Aug 4.
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