[RFC PATCH] getaddrinfo: Force name resolution for AI_CANONNAME [BZ# 24182]

[Florian Weimer]

* Heitor R. Alves de Siqueira:

> This patch forces name resolution if the AI_CANONNAME flag is set. Even
> if inet_aton_exact() identifies the input name as being a valid IPv4
> address, we will try name resolution in case it's a valid hostname. If
> no hostname is found after resolution, the input name is still copied
> to the ai_canonname field.

This is not correct because it sends queries for names such as 192.0.2.1
to the DNS root servers.

I'm sorry, but I still don't see how the general idea is useful.  Which
applications benefit if getaddrinfo returns in ai_canonname which will
most likely resolve to a completely different set of addresses?

Do you have a bug report that requests a behavior change in this area?
Which problem is this trying to address?

Thanks,
Florian