Add dns.resolve that returns all results

[skeggse]

Similar to #736, it'd be nice if we had a dns.resolve that queries for all results.

Would the Node core maintainers be amenable to a pr that adds this functionality via c-ares, or should such an addition be delayed until after #1013 has been resolved?

[silverwind]

resolve already returns an array of results, what's exactly the issue?

[skeggse]

Unless I'm mistaken, resolve returns an array of results for one record type (like A, AAAA, CNAME, MX, etc). I'd like to be able to do a wildcard query, supported by c-ares with the ns_t_any type.

[silverwind]

Oh, you're talking about the ANY query. Well, that'd be indeed something we should support imho.

[skeggse]

Thoughts on whether we should wait for #1013? Or should I put together a pr?

Edit: er... not sure how #1843 fits into this

[silverwind]

Personally, I'd rather see #1843 reviewed, fixed and shipped. @mscdex's call if we should further extend c-ares now.

[skeggse]

Sounds good. This isn't super critical for me atm.

[mscdex]

Work is still ongoing with the js dns resolver. If it's a simple change and someone wants to add it for c-ares in the meantime, feel free to do so.

[silverwind]

This shouldn't be too hard to add. dns.resolve should take a new rrtype ANY, and we likely want a resolveAny method as well.

[silverwind]

On the other hand, there is the issue that we need to return the rrtype of the various records to the user, but we can't really change the addresses array on dns.resolve to something else. Maybe this special query should live only as resolveAny where we could return an array of objects like

[
  {rrtype: 'A', record: 'something.com'},
  {rrtype: 'MX', record: 'mx.something.com'},
]

[kulkarniankita]

Is anyone working on adding this? If not, I can work on this. (cc: @jasnell, @silverwind )

[kulkarniankita]

Working on this one now. @jasnell @mhdawson