On Fri, 20 May 2022, Dmitry Karpov wrote:
I understand the rationale for keeping DNS entry in the cache for both addresses, but in my proposal, I suggest to use "dual-stack" DNS queries only for dual-stack and IPv6-only modes. This will make IPv4-only requests in IPv6-enabled libcurl builds behave the same way as they do in IPv4-only builds.
I believe that suggestion would basically revert 84d2839740ca7804, so it would need some careful considerations.
Maybe we should rather add some variation to CURLOPT_IPRESOLVE for more explicit *also applies to name resolving*? We might need to do something about caching/connection reuse too, or at least decide and document exactly how those would work in these siutations.
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